CN221162016U - Shock attenuation truckle structure and wheelchair - Google Patents

Abstract

The utility model discloses a shock-absorbing castor structure and a wheelchair. This shock attenuation truckle structure, including truckle, base, damper and dust cover, damper includes the back shaft body, elasticity cushioning member, elastic support spare and first bearing, and elasticity cushioning member cover is established at first axial region, and the dust cover is established at second axial region, and the notch of dust cover mounting groove, and elastic support spare is including elastic support portion and the installation department that are connected, and the installation department sets up between dust cover and first bearing to make elastic support portion can elastic support dust cover. According to the utility model, the elastic damping part is sleeved on the supporting shaft body, so that vibration caused by load transmission to the wheelchair is reduced, the stability of the wheelchair in moving is ensured, in addition, the elastic supporting part is arranged between the dust cover and the first bearing, the elastic supporting part can elastically support the dust cover, the moving amplitude of the dust cover is reduced, and the contact between the dust cover and the base or the first bearing is avoided, so that the steering of the caster wheel is smoother.

Description

Shock attenuation truckle structure and wheelchair

Technical Field

The utility model relates to a shock-absorbing trundle structure and a wheelchair, and belongs to the technical field of nursing equipment.

Background

Universal wheels are so-called casters, which are structured to allow 360-degree horizontal rotation in either dynamic or static loads. The device is widely applied to various industries and fields such as mines, mechanical equipment, electronic equipment, medical equipment, engineering decoration, textile, printing and dyeing, furniture, logistics equipment, storage, turnover vehicles, cabinets, equipment, electromechanics, dust-free workshops, production lines, supermarkets and the like, and is applied to wheelchairs.

The existing universal wheel generally carries out horizontal steering through the matching of the bearing and the main shaft, and in order to protect the bearing, a dust cover is usually arranged on the upper side of the bearing so as to prevent external sundries from entering the bearing and further influence the rotation of the universal wheel. However, when a patient takes a wheelchair or encounters a bumpy road surface, the structure can apply downward pressure to the main shaft and the dust cover, so that the dust cover can easily move downwards and be abutted against the bearing, friction is generated between the dust cover and the bearing when the universal wheel is required to turn, the turning of the universal wheel is prevented, the bearing is easily scratched, and the service life of the bearing is reduced.

Disclosure of utility model

Aiming at the defects of the prior art, the utility model aims to provide a shock-absorbing castor structure and a wheelchair.

In order to achieve the purpose of the utility model, the technical scheme adopted by the utility model comprises the following steps:

The utility model provides a shock absorption trundle structure which comprises a trundle, a base, a shock absorption component and a dust cover, wherein the trundle is movably connected with the base, one end of the base, which is far away from the trundle, is provided with a mounting groove, the shock absorption component comprises a supporting shaft body, an elastic shock absorption part, an elastic supporting part and a first bearing, the supporting shaft body is provided with a first limiting boss which radially extends along the supporting shaft body, the first limiting boss divides the supporting shaft body into a first shaft part and a second shaft part, the first bearing is arranged in the mounting groove, the second shaft part at least partially stretches into the mounting groove and is movably connected with the first bearing in a matched mode, the elastic shock absorption part is sleeved on the first shaft part, the projection of the elastic shock absorption part falls into the projection of the first limiting boss, the dust cover is sleeved on the second shaft part, the dust cover covers the notch of the mounting groove, and the elastic supporting part comprises an elastic supporting part and a mounting part which is connected with the first bearing, and the dust cover is arranged between the first bearing and the elastic supporting part.

Further, the installation department includes the installation ring body, the installation ring body cover is established the second shaft portion, the elastic support portion is including the first section and the second section that connect gradually, the first section with the installation ring body is connected, just the first section is followed the outside slope of axis of installation ring body sets up, the second section is followed the radial extension of installation ring body, the second section can with the dust cover looks butt, with elastic support the dust cover.

Further, the elastic support piece is provided with a plurality of elastic support parts, and the elastic support parts are uniformly arranged along the circumferential direction of the mounting ring body.

Further, the support shaft body is provided with a second limiting boss extending radially along the support shaft body, the second limiting boss is connected with the second limiting boss, the dust cover is sleeved on the second limiting boss, the mounting ring body is sleeved between the second limiting boss and the first bearing, and the diameter of the second limiting boss is not smaller than that of the mounting ring body.

Further, a first gasket is arranged between the mounting ring body and the first bearing, and the first gasket is sleeved on the second shaft portion.

Further, the damping component comprises a protection sleeve, the protection sleeve is sleeved outside the elastic damping part, a limiting gasket is arranged between the protection sleeve and the first limiting boss, the limiting gasket is sleeved on the first shaft part, and the diameter of the limiting gasket is larger than that of the protection sleeve.

Further, the elastic cushioning member is an elastic cylinder structure or a spring.

Further, the end face of the limiting gasket, which is close to the elastic damping part, is provided with an annular mounting groove, and one end of the protection sleeve is arranged in the annular mounting groove.

Further, the damping component comprises a first nut, the first nut is connected with the end part of the first shaft part in a matched mode, an elastic gasket is arranged between the first nut and the protection sleeve, one end of the elastic gasket is abutted to the first nut, and the other end of the elastic gasket is abutted to the protection sleeve.

Further, the damping component comprises a second bearing and a second nut, the second bearing is arranged in the mounting groove, the second bearing is movably connected with the second shaft part in a matched mode, the second nut is connected with the end portion of the second shaft part in a matched mode, a second gasket is arranged between the second nut and the second bearing, one end of the second gasket is abutted to the second nut, and the other end of the second gasket is abutted to the second bearing.

Further, the shock-absorbing castor structure further comprises a baffle, one end of the baffle is connected with the end of the second shaft portion, and the baffle is arranged in an outward inclined mode along the axis of the second shaft portion.

The utility model also provides a wheelchair, characterized by comprising: a wheelchair frame and any one of the shock absorbing caster structures, the support shaft being connected to the wheelchair frame.

Compared with the prior art, the utility model has the advantages that:

(1) According to the utility model, the elastic shock-absorbing member is sleeved on the supporting shaft body, so that when the situation of bumpy road surface or poor road surface is met, the caster wheel can receive vertical impact load, the elastic shock-absorbing member elastically deforms in the vertical direction, and the vertical load is counteracted and absorbed, so that the vibration caused by the load transmitted to the wheelchair is reduced, and the stability of the wheelchair in moving is ensured.

(2) According to the utility model, the elastic supporting piece is arranged between the dust cover and the first bearing, when the dust cover is stressed to move downwards, the elastic supporting part can elastically support the dust cover, so that the movement amplitude of the dust cover is reduced, the contact between the dust cover and the base or the first bearing is avoided, the steering of the caster wheel is smoother, the abrasion of the first bearing is reduced, and the service life of the caster wheel is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.

FIG. 1 is a schematic view of the shock absorbing caster structure of embodiment 1 of the present utility model;

FIG. 2 is a partial sectional view of the shock absorbing assembly and the base in embodiment 1;

FIG. 3 is an enlarged view at A in FIG. 2;

FIG. 4 is a schematic structural view of the elastic support member in embodiment 1;

fig. 5 is a schematic view showing the structure of a wheelchair according to embodiment 2 of the present utility model.

Reference numerals illustrate:

100. Casters; 110. a base; 120. a mounting groove; 210. a support shaft body; 211. the first limiting boss; 212. a first shaft portion; 213. a second shaft portion; 214. the second limiting boss; 220. an elastic damping member; 230. an elastic support; 231. installing a ring body; 232. an elastic support part; 233. a first section; 234. a second section; 240. a first bearing; 260. a second bearing; 271. a first gasket; 272. a limiting gasket; 273. an annular mounting groove; 274. an elastic pad; 275. a second gasket; 280. a protective sleeve; 291. a first nut; 292. a second nut; 300. a dust cover; 400. a baffle; 510. a wheelchair frame; 520. and (5) supporting legs.

Detailed Description

In view of the shortcomings in the prior art, the inventor of the present utility model has long studied and practiced in a large number of ways to propose the technical scheme of the present utility model. The technical scheme, the implementation process, the principle and the like are further explained as follows.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways than those described herein, and therefore the scope of the present utility model is not limited to the specific embodiments disclosed below.

In addition, in the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "horizontal", "vertical", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present specification, reference to the term "one embodiment," "an embodiment," "the embodiment," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The technical scheme, the implementation process and the principle thereof are further explained with reference to the attached drawings.

Example 1

Referring to fig. 1-4, a shock-absorbing caster structure includes a caster 100 and a base 110, wherein the caster 100 is movably connected with the base 110, one end of the base 110 far away from the caster 100 is provided with a mounting groove 120, in the existing structure, the base 110 is provided with a base, a pair of support arms are connected to the bottom of the base, two support arms and the base enclose a containing space for containing a part of the caster 100, a through connecting hole is formed in the center of the caster 100, one end of each support arm is movably connected with the connecting hole of the caster 100 through a connecting pin, so that the caster 100 can rotate on the base 110 along its own axis, wherein the top of the base along the vertical direction is provided with the mounting groove 120, and the mounting groove 120 can be a slotted hole structure with the top of the base recessed downwards along the vertical direction and is communicated with the containing space.

In addition, as shown in fig. 2, the shock-absorbing caster structure further includes a shock-absorbing assembly and a dust cover 300, the shock-absorbing assembly includes a supporting shaft body 210, an elastic shock-absorbing member 220, an elastic supporting member 230 and a first bearing 240, the supporting shaft body 210 is provided with a first limiting boss 211 extending radially along the supporting shaft body 210, the first limiting boss 211 divides the supporting shaft body 210 into a first shaft portion 212 and a second shaft portion 213, the first bearing 240 is disposed in the mounting groove 120, the second shaft portion 213 at least partially extends into the mounting groove 120 and is movably connected with the first bearing 240 in a matching manner, the elastic shock-absorbing member 220 is sleeved on the first shaft portion 212, in the axial direction of the supporting shaft body 210, the projection of the elastic shock-absorbing member 220 falls into the projection of the first limiting boss 211, the dust cover 300 is sleeved on the second shaft portion 213, and the dust cover 300 covers the notch of the mounting groove 120, the elastic supporting member 230 includes an elastic supporting portion 232 and a mounting portion connected, and the mounting portion is disposed between the dust cover 300 and the first bearing 240, so that the elastic supporting portion 232 can elastically support the dust cover 300.

In the present embodiment, the support shaft body 210 is mounted on the base 110 in the vertical direction, the support shaft body 210 is divided into a first shaft portion 212 and a second shaft portion 213 by a first limiting boss 211, the first shaft portion 212 is located at an upper side of the second shaft portion 213, and the first limiting boss 211 may be an annular boss structure provided on the support shaft body 210. During installation, the first bearing 240 is firstly installed in the installation groove 120, wherein an annular supporting boss is arranged on the inner wall of the installation groove 120 and used for supporting the bottom end of the first bearing 240, the first bearing 240 is prevented from moving downwards along the vertical direction, then the dust cover 300 and the installation part of the elastic supporting piece 230 are sequentially installed on the second shaft part 213, the second shaft part 213 of the supporting shaft body 210 is inserted into the installation groove 120, the inner ring of the first bearing 240 is fixedly connected with the second shaft part 213 in a matched manner, the outer ring of the first bearing 240 is fixedly connected in the installation groove 120, so that the outer ring of the first bearing 240 can rotate relative to the supporting shaft body 210, and the base 110 and the caster 100 can rotate relative to the supporting shaft body 210, so that the steering of the caster 100 is realized. After the second shaft portion 213 is mounted on the base 110, the dust cover is located on the upper portion of the base 110 and covers the notch of the mounting groove 120, so that foreign matters such as external particles can be prevented from entering the mounting groove 120 and being clamped between the first bearing 240 and the supporting shaft body 210, and further the rotation of the caster 100 can be affected. In addition, the first limiting boss 211 may effectively limit the upward movement of the dust cap 300, thereby reducing a gap between the dust cap and the base 110. At this time, the elastic supporting portion 232 of the elastic supporting member 230 is located between the dust cover 300 and the first bearing 240. And the elastic damping member 220 is sleeved on the outer side surface of the first shaft portion 212 of the supporting shaft body 210, wherein the elastic damping member 220 is a cylindrical knot, and the diameter of the elastic damping member 220 is smaller than that of the first limiting boss 211, so that the elastic damping member 220 can be vertically limited, and the elastic damping member 220 can absorb shock of the caster 100 in the axial direction of the supporting shaft body 210.

When the shock absorbing caster structure is used, the shock absorbing caster structure can be applied to a wheelchair, and particularly, the shock absorbing caster structure is applied to the wheelchair, which is only one application mode of the application, and the application range of the shock absorbing caster structure is not limited. When a patient takes the wheelchair and moves, the caster 100 receives a vertical impact load when the patient encounters a bumpy road surface or a worse road surface condition and transmits the load to the support shaft body 210, and the elastic cushioning member 220 positioned on the support shaft body 210 generates elastic deformation in the vertical direction at this time, so as to offset and absorb the vertical load, thereby reducing the vibration caused by the load transmitted to the wheelchair and ensuring the stability of the wheelchair during movement. In addition, when a patient takes a wheelchair or encounters a bumpy road, a downward load is generated on the support shaft body 210, the support shaft body 210 is driven to move downward, so that downward pressure is applied to the dust cover 300, the dust cover 300 is easy to move downward and is abutted against the first bearing 240 or the base 110, friction is generated between the dust cover and the base 110 or the first bearing 240 when the caster 100 is required to be steered, and the steering of the caster 100 is hindered, therefore, the elastic support member 230 is arranged between the dust cover 300 and the first bearing 240, and when the dust cover 300 is forced to move downward, the elastic support member 232 can elastically support the dust cover 300, and counteract or slow down the load of the dust cover 300 by generating elastic deformation, so that the movement amplitude of the dust cover 300 is reduced, and the contact between the dust cover 300 and the base 110 or the first bearing 240 is effectively avoided, so that the steering of the caster 100 is smoother.

In the specific structure of the elastic supporting member 230, as shown in fig. 2, 3 and 4, the mounting portion includes a mounting ring 231, the mounting ring 231 is sleeved on the second shaft 213, the elastic supporting portion 232 includes a first section 233 and a second section 234 connected in sequence, the first section 233 is connected with the mounting ring 231, the first section 233 is inclined outwards along the axis of the mounting ring 231, and the second section 234 extends along the radial direction of the mounting ring 231, and the second section 234 can abut against the dust cover 300 to elastically support the dust cover 300. In this embodiment, the mounting ring body 231 is sleeved on the second shaft portion 213, one end of the first section 233 on the elastic support portion 232 is fixedly connected to the upper end surface of the mounting ring body 231, the first section 233 extends upward relative to the mounting ring body 231, and the extending direction extends outward relative to the axis of the mounting ring body 231, so that elastic deformation is convenient to occur when downward load is applied, one end of the second section 234 of the elastic support portion 232 is connected with the other end of the first section 233, and the extending direction of the second section 234 extends along the radial direction of the mounting ring body 231, so that after the elastic support member 230 is mounted on the support shaft body 210, the second section 234 can be in a relatively horizontal position, and the contact area with the protective cover can be increased, so that the protective cover is better supported. When the protective cover is subjected to downward load to move downwards, the protective cover is abutted against the second section 234 of the elastic supporting part 232, the second section 234 moves downwards, and the first section 233 elastically deforms downwards, so that most of the load is counteracted or absorbed, contact friction between the protective cover and the base 110 or the first bearing 240 is effectively avoided, and the caster 100 is conveniently steered.

The elastic support 230 is provided with a plurality of elastic support portions 232, and the plurality of elastic support portions 232 are uniformly arranged along the circumferential direction of the mounting ring 231. In this embodiment, four two-section elastic supporting portions 232 are provided, and the four elastic supporting portions 232 are uniformly connected in the circumferential direction of the mounting ring body 231, so that the supporting stability of the protective cover is improved, the stress is uniform, and the situation that the protective cover is inclined and deviated is effectively avoided.

In addition, as shown in fig. 2, the supporting shaft body 210 is provided with a second limiting boss 214 extending radially along the supporting shaft body, the second limiting boss 214 is connected with the second limiting boss 214, the dust cover 300 is sleeved on the second limiting boss 214, the mounting ring body 231 is sleeved between the second limiting boss 214 and the first bearing 240, and the diameter of the second limiting boss 214 is not smaller than that of the mounting ring body 231. In this embodiment, the second limiting boss 214 is also an annular boss structure disposed on the support shaft body 210, where the diameter of the second limiting boss 214 is smaller than that of the first limiting boss 211, the protective cover is sleeved on the second limiting boss 214, the mounting portion of the elastic supporting member 230 is sleeved on the lower side of the second limiting boss 214, and the diameter of the mounting portion is not greater than that of the second limiting boss 214, and the second limiting boss 214 plays a role in vertically limiting the elastic supporting member 230, so as to prevent the elastic supporting member 230 from moving upwards, and further affect the effect on the supporting stability of the protective cover. Wherein, a first gasket 271 is provided between the mounting ring 231 and the first bearing 240, and the first gasket 271 is sleeved on the second shaft 213. On the one hand, the first pad 271 can avoid direct contact friction between the mounting ring 231 and the first bearing 240, so that the caster 100 can be steered more smoothly, and the mounting ring 231 and the first bearing 240 can be better protected. On the other hand, the first pad 271 can effectively increase the vertical distance between the shield and the first bearing 240, and better reduce the contact friction between the shield and the first bearing 240.

In the shock-absorbing assembly's concrete structure, shock-absorbing assembly still includes protection sleeve 280, and protection sleeve 280 cover is established in the elasticity cushioning member 220 outside, is equipped with spacing gasket 272 between protection sleeve 280 and the first spacing boss 211, and spacing gasket 272 cover is established at first shaft portion 212, and the diameter of spacing gasket 272 is greater than the diameter of protection sleeve 280. The protection sleeve 280 is sleeved on the outer side surface of the elastic damping member 220, so that on one hand, the elastic damping member 220 can be protected, and external sundries are prevented from being wound or clamped on the elastic damping member 220, and the elastic damping effect of the elastic damping member is prevented from being influenced; on the other hand, the protection sleeve 280 may play a radial limiting role on the elastic damping member 220, so as to avoid the movement of the elastic damping member 220 in the radial direction, thereby resulting in the problem of reducing the damping effect in the vertical direction. And be provided with spacing gasket 272 between protection sleeve 280 and the first spacing boss 211, wherein the diameter of spacing gasket 272 is greater than the diameter of protection sleeve 280, can carry out spacing to protection sleeve 280, the effectual protection sleeve 280 of avoiding and first spacing boss 211 direct contact friction, in addition, protection sleeve 280 is after receiving vertical load, its bottom and spacing gasket 272 produce vertical impact, if the diameter of spacing gasket 272 equals or is less than the diameter of protection sleeve 280, the problem such as cracking deformation appears in the bottom of protection sleeve 280 easily to the impact between the two, reduce protection sleeve 280's life, consequently, the diameter of spacing gasket 272 is greater than the diameter of protection sleeve 280, make spacing gasket 272 increase the area of contact with protection sleeve 280 bottom, thereby load that can better accept protection sleeve 280 bottom applys, the problem of cracking deformation appears in the bottom of protection sleeve 280 is avoided.

Specifically, as shown in fig. 3, an annular mounting groove 273 is formed on the end surface of the limiting gasket 272 near the elastic damping member 220, and one end of the protection sleeve 280 is disposed in the annular mounting groove 273. The bottom part of the protection sleeve 280 is inserted into the annular mounting groove 273, so that the connection stability of the protection sleeve 280 and the limiting gasket 272 is improved, the annular mounting groove 273 can radially limit the bottom of the protection sleeve 280, the protection sleeve 280 is effectively prevented from being deformed radially under the impact force, the protection sleeve 280 is further protected, and the service life of the protection sleeve 280 is prolonged.

In addition, in this embodiment, the elastic damping member 220 is an elastic cylinder structure, and the elastic damping member 220 may be made of rubber material and may be provided with one or more vertical stacking arrangements. In addition, the elastic damping member 220 may be a spring, and the spring is sleeved on the support shaft 210.

Specifically, the damper assembly includes a first nut 291, wherein the first nut 291 is connected to an end of the first shaft 212 in a mating manner, and an elastic pad 274 is disposed between the first nut 291 and the protection sleeve 280, one end of the elastic pad 274 abuts against the first nut 291, and the other end abuts against the protection sleeve 280. After the elastic damping member 220 and the protection sleeve 280 are mounted on the support shaft body 210, the elastic damping member 220 and the protection sleeve 280 are required to be limited, the elastic damping member is limited on the lower side by using the limiting gasket 272 and the first limiting boss 211, an external thread structure matched with the first nut 291 is arranged on the top end portion of the support shaft body 210 on the upper side limit, the first nut 291 is connected to the top of the support shaft body 210, the upper sides of the elastic damping member 220 and the protection sleeve 280 are limited, the elastic damping member 220 and the protection sleeve 280 are relatively fixed on the support shaft body 210, the stability of the damping process is improved, an elastic gasket 274 is arranged between the first nut 291 and the protection sleeve 280, the elastic damping effect between the first nut 291 and the protection sleeve 280 is improved, and accordingly vibration of the protection sleeve 280 is reduced.

The damping assembly further comprises a second bearing 260 and a second nut 292, the second bearing 260 is arranged in the mounting groove 120, the second bearing 260 is movably connected with the second bearing 213 in a matched mode, a limiting ring is sleeved between the first bearing 240 and the second bearing 260 on the second bearing 213, the second nut 292 is connected with the end portion of the second bearing 213 in a matched mode, a second gasket 275 is arranged between the second nut 292 and the second bearing 260, one end of the second gasket 275 abuts against the second nut 292, and the other end abuts against the second bearing 260. In this embodiment, the annular supporting boss inside the mounting groove 120 divides the mounting groove 120 into two areas along the vertical direction, and is used for accommodating the first bearing 240 and the second bearing 260, wherein the first bearing 240 is mounted in the upper area, the bottom of the first bearing 240 is abutted against the annular supporting boss, the second bearing 260 is mounted in the lower area, the top of the second bearing 260 is abutted against the annular supporting boss, and the supporting shaft body 210 is inserted into the mounting groove 120 and is respectively connected with the first bearing 240 and the second bearing 260 in a matching manner, so that the steering smoothness of the caster 100 is further improved. In addition, an external screw structure matched with the second nut 292 is disposed at the lower end portion of the support shaft body 210, the second nut 292 is connected to the support shaft body 210, so that the lower side of the second bearing 260 can be limited, friction with the second bearing 260 is likely to occur when the second nut 292 is mounted and dismounted, and thus the second bearing 260 is easily scratched, and therefore, the second gasket 275 is disposed between the second nut 292 and the second bearing 260, so that the second nut 292 is effectively prevented from being in direct contact with the second bearing 260.

In addition, the shock-absorbing caster structure further includes a barrier 400, one end of the barrier 400 is connected to an end of the second shaft portion 213, and the barrier 400 is disposed to be inclined outwardly along an axis of the second shaft portion 213. In this embodiment, the upper end of the baffle 400 is mounted at the bottom end of the supporting shaft body 210, and may be sleeved on the second nut 292, or mounted at the lower side of the second nut 292, the baffle 400 extends downward and is disposed obliquely outward along the axis of the supporting shaft body 210, and the end of the baffle 400 extending outward is at least at the same height as the axis of the caster 100, so that when passing through some ground with water accumulation, the caster 100 can be effectively blocked from splashing water onto the wheelchair and the patient, thereby further improving the riding comfort of the patient.

Example 2

Referring to fig. 5, the present utility model further provides a wheelchair, which includes a wheelchair frame 510 and the shock-absorbing caster structure, and a support shaft 210 is connected to the wheelchair frame 510.

In this embodiment, the wheelchair frame 510 is a wheelchair skeleton structure, or the wheelchair skeleton structure, the covered fabric and the related filler, two supporting legs 520 are disposed in front of the wheelchair frame 510, and two shock-absorbing caster structures are respectively mounted at the bottoms of the two supporting legs 520, wherein a mounting cylinder is disposed at the bottom of the wheelchair frame 510, and the supporting shaft body 210 can be inserted into the mounting cylinder for connection, and the connection manner can be a connection manner such as welding or threaded connection, so as to improve the connection strength.

It should be understood that the above embodiments are merely for illustrating the technical concept and features of the present utility model, and are intended to enable those skilled in the art to understand the present utility model and implement the same according to the present utility model without limiting the scope of the present utility model. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.

Claims (10)

1. The utility model provides a shock attenuation truckle structure, includes truckle, base, the truckle with base swing joint, the base is kept away from the one end of truckle is equipped with the mounting groove, its characterized in that still includes: the damping assembly comprises a supporting shaft body, an elastic damping part, an elastic supporting part and a first bearing, wherein the supporting shaft body is provided with a first limiting boss extending radially along the supporting shaft body, the first limiting boss divides the supporting shaft body into a first shaft portion and a second shaft portion, the first bearing is arranged in the mounting groove, the second shaft portion at least partially stretches into the mounting groove and is movably connected with the first bearing in a matched mode, the elastic damping part is sleeved on the first shaft portion, the elastic damping part is projected in the axial direction of the supporting shaft body, the dust cover is sleeved on the second shaft portion, the dust cover covers the notch of the mounting groove, and the elastic supporting part comprises an elastic supporting portion and a mounting portion which are connected, and the mounting portion is arranged between the dust cover and the first bearing, so that the elastic supporting portion can elastically support the dust cover.

2. A shock absorbing castor structure according to claim 1, wherein: the installation department includes the installation ring body, the installation ring body cover is established the second shaft portion, the elastic support portion is including the first section and the second section that connect gradually, the first section with the installation ring body is connected, just the first section is followed the outside slope of axis of installation ring body sets up, the second section is followed the radial extension of installation ring body, the second section can with the dust cover looks butt to elastic support the dust cover.

3. A shock absorbing castor structure according to claim 2, wherein: the elastic support piece is provided with a plurality of elastic support parts, and the elastic support parts are uniformly arranged along the circumference of the mounting ring body.

4. A shock absorbing castor structure according to claim 2, wherein: the support shaft body is provided with a second limiting boss extending radially along the support shaft body, the second limiting boss is connected with the first limiting boss, the dust cover is sleeved on the second limiting boss, the mounting ring body is sleeved between the second limiting boss and the first bearing, and the diameter of the second limiting boss is not smaller than that of the mounting ring body;

And/or a first gasket is arranged between the mounting ring body and the first bearing, and the first gasket is sleeved on the second shaft part.

5. A shock absorbing castor structure according to claim 1, wherein: the damping component comprises a protective sleeve, the protective sleeve is sleeved on the outer side of the elastic damping part, a limiting gasket is arranged between the protective sleeve and the first limiting boss, the limiting gasket is sleeved on the first shaft part, and the diameter of the limiting gasket is larger than that of the protective sleeve;

and/or the elastic cushioning member is an elastic cylinder structure or a spring.

6. The shock absorbing caster structure of claim 5, wherein: the limiting gasket is close to the end face of the elastic damping part, an annular mounting groove is formed in the end face of the elastic damping part, and one end of the protection sleeve is arranged in the annular mounting groove.

7. The shock absorbing caster structure as defined in claim 6, wherein: the damping component comprises a first nut, the first nut is connected with the end part of the first shaft part in a matched mode, an elastic gasket is arranged between the first nut and the protection sleeve, one end of the elastic gasket is abutted to the first nut, and the other end of the elastic gasket is abutted to the protection sleeve.

8. A shock absorbing castor structure according to claim 1, wherein: the damping component comprises a second bearing and a second nut, wherein the second bearing is arranged in the mounting groove, the second bearing is movably connected with the second shaft part in a matched mode, the second nut is connected with the end portion of the second shaft part in a matched mode, a second gasket is arranged between the second nut and the second bearing, one end of the second gasket is abutted to the second nut, and the other end of the second gasket is abutted to the second bearing.

9. A shock absorbing castor structure according to claim 1, wherein: the device further comprises a baffle, one end of the baffle is connected with the end part of the second shaft part, and the baffle is arranged in an outward inclined mode along the axis of the second shaft part.

10. A wheelchair, comprising: a wheelchair frame and a shock absorbing castor arrangement according to any one of claims 1 to 9, the support shaft being connected to the wheelchair frame.