Damping type castor
Technical Field
The invention relates to the technical field of casters, in particular to a vibration reduction type caster.
Background
The truckle is a common mechanical hardware fitting, and its is extensively applicable to the bottom that bears equipment (such as furniture, shallow, machining equipment, medical instrument) for conveniently bear the removal of equipment, when the truckle passes through some rugged ground, can produce great vibration, not only can influence and bear equipment and use experience, can exert an influence to the life-span of truckle moreover. At present, some casters in the prior art also have a vibration reduction function, but the vibration reduction effect of the vibration reduction mode is poor due to the fact that the springs are directly used for bearing and reducing vibration, and the vibration reduction function is easy to lose efficacy due to the fact that the springs are directly used for bearing and are high in requirements on the springs and high in loss of the springs.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide the vibration reduction type castor, which utilizes the vibration reduction mechanism of the lever principle formed by matching the bracket body, the vibration reduction frame and the spring, has good vibration reduction effect, has smaller requirement and loss on the spring, has more stable and durable overall structure, and is beneficial to prolonging the service life of the castor.
The task of the invention is realized by the following technical scheme:
The damping type castor comprises a castor bracket, wheels arranged at the lower part of the castor bracket and a mounting structure arranged at the upper part of the castor bracket and used for connecting bearing equipment, wherein the castor bracket comprises a bracket body, a damping bracket, a fixing frame, at least one group of springs and a fixing rod, the damping bracket is of an integrated structure and comprises two inner side plates which are vertically arranged in parallel and a pressing plate which is transversely connected with the upper ends of the front parts of the two inner side plates, and the rear parts of the two inner side plates are respectively hinged with wheel shafts at two sides of the wheels; the support body is integrated into one piece structure, including two vertical curb plates that set up side by side and the roof of transversely connecting two curb plate upper ends, two curb plates set up in two inboard outsides, and the rear portion lower extreme of each curb plate articulates through the hinge respectively with corresponding inboard, hinge and the parallel interval setting of shaft and hinge are located the place ahead of shaft, two curb plates of mount transverse fixed connection just are located between roof and the clamp plate, the dead lever passes the through-hole that sets up on the clamp plate, the mount is connected to the upper end of dead lever, lower extreme threaded connection bearing piece, the spring housing is outside the dead lever that corresponds, and the upper end and the lower extreme of spring butt clamp plate and bearing piece respectively.
Preferably, the support is a screw cap or the support is a combination of screw cap and pallet.
Preferably, the both ends of mount are equipped with the connecting portion of buckling downwards respectively, and two connecting portions paste with two respectively the lateral plate inner wall mutually and pass through bolt or rivet fixed connection, two of shock absorber frame the medial plate is located between two connecting portions, thereby makes the mount can be spacing to the shock absorber frame in the left and right sides direction.
Preferably, a gap is provided between the front portions of the two inner side plates and the corresponding outer side plate, and the connecting portion is located in the gap between the corresponding inner side plate and the corresponding outer side plate.
Preferably, the through hole is a long hole arranged along the front-back direction, and the vibration reduction rack can move in the range of the through hole relative to the fixed rod.
Preferably, the upper end of the fixing rod is fixedly connected with the fixing frame, or an upper end head is fixedly arranged at the upper end of the fixing rod, and the fixing rod penetrates through a through hole in the fixing frame and is hung on the fixing frame through the upper end head.
Preferably, the mounting structure is connected through the carousel subassembly that can horizontal rotation the support body, the carousel subassembly includes ripples dish, ripples dish down, a plurality of first ball, a plurality of second ball and fastener, and the roof is located between ripples dish and the ripples dish down, be equipped with annular connecting portion on the roof, the lower surface of ripples dish and the upper surface of annular connecting portion are equipped with first annular and second annular relatively respectively, and the lower surface of annular connecting portion and the upper surface of ripples dish down are equipped with third annular and fourth annular relatively respectively, and the cross-section of first annular, second annular, third annular and fourth annular is concave arc structure, first ball is located between first annular and the second annular, and second ball is located between third annular and the fourth annular, the truckle support rotates with the carousel subassembly through first ball and is connected, the fastener passes perpendicularly in proper order and goes up the perforation at ripples dish and ripples dish center and is in the same place its fastening connection, mounting structure fixed connection is in on the ripples dish or the fastener.
Preferably, the perforated edge of the upper wave plate and the perforated edge of the lower wave plate are tightly attached together under the action of the fastener, the perforated inner side wall of the upper wave plate and the perforated inner side wall of the lower wave plate are tightly attached to the outer side wall of the fastener, the second annular groove and the third annular groove are staggered in the radial direction of the annular connecting part, and the second annular groove is positioned at the outer side of the third annular groove in the radial direction.
Preferably, the mounting structure is fixedly connected with the top plate, or the mounting structure and the top plate are integrally formed.
Preferably, the mounting structure is one of a mounting plate, a plug rod, a screw rod and a jack.
Compared with the prior art, the damping castor has the following advantages: ① The wheel can jump upwards when running on uneven ground, the vibration-damping frame is driven to deflect anticlockwise around the hinge shaft, the spring is compressed downwards through the pressing plate on the vibration-damping frame, so that the jump of the wheel is absorbed and filtered through the spring, vibration damping of the caster is realized, compared with a traditional spring direct bearing type vibration damping structure, the vibration-damping caster has better vibration damping effect by utilizing the lever principle vibration-damping mechanism formed by matching the bracket body, the vibration-damping frame and the spring, the bearing of the spring can be effectively reduced by utilizing the lever principle, the requirement on the spring is smaller, and the loss of the spring can be reduced, so that the vibration-damping mechanism is more stable and durable, and has longer service life; the springs in the embodiment are horizontally arranged, so that the height of the integral castor can be reduced, the space is saved, the matching between the vibration reduction rack and the bracket body is more compact, and the structural design is ingenious; ② When the bearing equipment borne above the caster bracket is heavy, the jump generated at different places where the wheels travel on the caster bracket can cause the contact position of the upper end of the spring and the vibration reduction frame to generate very large instant impact force, and based on the consideration, the pressure plate on the vibration reduction frame downwards presses the upper end of the spring, the contact area of the pressure plate and the upper end of the spring is relatively large, and the pressure plate and the vibration reduction frame are of an integrated structure, so that the bearing performance of the matched position of the pressure plate and the upper end of the spring is good, the pressure plate is not easy to loosen or damage under the action of repeated instant impact force for many times, and the stability and the durability are better; in addition, the application supports the lower end of the spring through the support member which is in threaded connection with the lower end (free end) of the fixed rod, and the instantaneous impact force of the upper end of the spring is filtered and absorbed by the spring, so that the impact force transmitted to the lower end of the spring is smaller, the support member can stably support the impact force of the lower end of the spring for a long time and is not easy to loosen, and simultaneously, the pretightening force of the spring can be adjusted by screwing or unscrewing the support member so as to adjust the vibration damping performance, and the lower end (free end) of the fixed rod and the support member occupy smaller space in the longitudinal direction, so that the longitudinal swinging space of the vibration damping frame is larger, and the support member is in threaded connection with the lower end (free end) of the fixed rod, thereby being convenient to assemble and disassemble; ③ The damping frame is located between two connecting portions of the fixing frame, and the gap between the inner side plate of the damping frame and the connecting portion of the fixing frame is smaller, so that the fixing frame can limit the damping frame in the left-right direction, the damping frame does not shake left and right or as little as possible when swinging longitudinally, the risk of damage to the fixing rod and the spring due to transverse torsion is avoided or reduced, and the structural strength and durability of the whole caster can be improved.
The conception, specific structure, and resulting effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present invention.
Drawings
FIG. 1 is a schematic view of the shock absorbing caster of the present invention;
FIG. 2 is a schematic view of another angle configuration of the shock absorbing caster of the present invention;
fig. 3 is an exploded view of the shock absorbing caster of the present invention.
Wherein: the caster bracket 1, the bracket body 11, the outer side plate 111, the top plate 112, the shock absorber 12, the inner side plate 121, the pressing plate 122, the through hole 123, the fixing frame 13, the connecting portion 131, the spring 14, the fixing rod 15, the nut 152, the supporting plate 153, the upper end 154, the wheel 2, the wheel axle 21, the mounting plate 3, the hinge shaft 4, the turntable assembly 5, the upper wave plate 51, the lower wave plate 52, the first ball 53, the second ball 54, and the fastener 55.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the description of the specific embodiments is intended for purposes of illustration only and is not intended to limit the scope of the present disclosure.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be indirectly connected through intervening elements. In addition, the terms "upper", "lower", "left", "right", "front", "rear", "lateral", "vertical" and the like are used herein for illustrative purposes only and do not represent the only embodiment.
As shown in fig. 1-3, the vibration-damping castor comprises a castor frame 1, wheels 2 arranged at the lower part of the castor frame 1 and a mounting plate 3 arranged at the upper part of the castor frame 1 and used for connecting bearing equipment, wherein the castor frame 1 comprises a frame body 11, a vibration-damping frame 12, a fixing frame 13, a group of springs 14 and a fixing rod 15, the vibration-damping frame 12 is of an integrated structure and comprises two inner side plates 121 which are vertically arranged in parallel and a pressing plate 122 transversely connected with the upper ends of the front parts of the two inner side plates 121, and the rear parts of the two inner side plates 121 are respectively hinged with wheel shafts 21 at two sides of the wheels 2; the bracket body 11 is of an integrated structure and comprises two outer side plates 111 which are vertically arranged in parallel and a top plate 112 which is transversely connected with the upper ends of the two outer side plates 111, the two outer side plates 111 are arranged outside the two inner side plates 121, the lower ends of the rear parts of the outer side plates 111 are hinged with the corresponding inner side plates 121 through hinge shafts 4 respectively, the hinge shafts 4 are arranged at intervals parallel to the wheel shafts 21 and the hinge shafts 4 are positioned in front of the wheel shafts 21, the fixing frame 13 is transversely fixedly connected with the two outer side plates 111 and positioned between the top plate 112 and the pressing plate 122, a fixing rod 15 penetrates through a through hole 123 formed in the pressing plate 122, the upper end of the fixing rod 15 is connected with the fixing frame 13, the lower end of the fixing rod is in threaded connection with a supporting piece, the supporting piece is a combination of a nut 152 and a supporting plate 153, a spring 14 is sleeved outside the corresponding fixing rod 15, and the upper end and the lower end of the spring 14 are respectively abutted against the pressing plate 122 and the supporting plate 153.
When the damping type castor is used, the wheel 2 can jump upwards when running on uneven ground, so that the damping frame 12 is driven to deflect anticlockwise around the hinge shaft 4, and the spring 14 is compressed downwards through the pressing plate 122 on the damping frame 12, so that the jump of the wheel 2 is absorbed and filtered through the spring 14, and the damping of the castor is realized. Compared with the traditional spring 14 direct bearing type damping structure, the damping type castor has the following advantages: ① The lever principle vibration damping mechanism formed by the cooperation of the bracket body 11, the vibration damping bracket 12 and the spring 14 has better vibration damping effect, and the bearing of the spring 14 can be effectively reduced by utilizing the lever principle, so that the requirement on the spring 14 is smaller, the loss of the spring 14 can be reduced, and the vibration damping mechanism is more stable and durable and has longer service life; the springs 14 in the embodiment are horizontally arranged, so that the height of the integral castor can be reduced, the space is saved, the matching between the vibration reduction frame 12 and the bracket body 11 is more compact, and the structural design is ingenious; ② The application has better bearing performance, stability and durability, because when the bearing equipment borne above the caster bracket 1 is heavy, the jump generated at the place with different traveling convex and concave of the wheels 2 can repeatedly generate very large instant impact force at the contact position of the upper end of the spring 14 and the vibration reduction frame 12, and based on the consideration, the contact area between the pressing plate 122 and the upper end of the spring 14 is relatively large by the downward pressing of the pressing plate 122 on the vibration reduction frame 12, and the pressing plate 122 and the vibration reduction frame 12 are of an integrated structure, the structural strength is high, so that the bearing performance of the matching position of the pressing plate 122 and the upper end of the spring 14 is good, the looseness or damage is not easy to occur under the action of repeated instant impact force for many times, and the stability and durability are better; in addition, the application supports the lower end of the spring 14 through the support member which is in threaded connection with the lower end (free end) of the fixing rod 15, and the instantaneous impact force of the upper end of the spring 14 is filtered and absorbed by the spring 14, so that the impact force transmitted to the lower end of the spring 14 is smaller, the support member can stably support the impact force of the lower end of the spring 14 for a long time and is not easy to loosen, and simultaneously, the pretightening force of the spring 14 can be adjusted through screwing or unscrewing the support member so as to adjust the vibration reduction performance, and the lower end (free end) of the fixing rod 15 and the support member occupy smaller space in the longitudinal space, so that the longitudinal swinging space of the vibration reduction frame 12 is larger, and the support member is in threaded connection with the lower end (free end) of the fixing rod 15, thereby being convenient for disassembly.
The both ends of mount 13 are equipped with the connecting portion 131 of buckling downwards respectively, and two connecting portion 131 paste mutually and pass through bolt or rivet fixed connection with two lateral plate 111 inner walls respectively, and two medial plate 121 of shock absorber 12 are located between two connecting portion 131 and the clearance is very little (approximately about 1 mm), thereby make the mount can be spacing to the shock absorber in the left and right directions for the shock absorber can not appear or rock about seldom as far as possible when vertically swaing, and then avoid or reduce dead lever, spring and bear horizontal torsion and lead to the risk of damage, and can increase the structural strength and the durability of whole truckle.
A gap is arranged between the front parts of the two inner side plates 121 and the corresponding outer side plate 111, and the connecting part 131 is positioned in the gap between the corresponding inner side plate 121 and the outer side plate 111; the design can more reasonably utilize the longitudinal space of the caster bracket 1 and increase the longitudinal swinging space of the vibration reduction frame 12 as much as possible.
The through hole 123 is a long hole provided in the front-rear direction, and the damper 12 can move within the range of the through hole 123 with respect to the fixing rod 15, so that the damper 12 can swing freely and smoothly.
An upper end 154 is fixedly arranged at the upper end of the fixed rod 15, and the fixed rod 15 passes through a perforation on the fixed frame 13 and is hung on the fixed frame 13 through the upper end 154.
The mounting plate 3 is connected with the bracket body 11 through the turntable assembly 5 capable of horizontally rotating, the turntable assembly 5 comprises an upper wave disc 51, a lower wave disc 52, a plurality of first balls 53, a plurality of second balls 54 and a fastener 55, a top plate 112 is positioned between the upper wave disc 51 and the lower wave disc 52, an annular connecting part is arranged on the top plate 112, a first annular groove and a second annular groove are respectively and oppositely arranged on the lower surface of the upper wave disc 51 and the upper surface of the annular connecting part, a third annular groove and a fourth annular groove are respectively and oppositely arranged on the lower surface of the annular connecting part and the upper surface of the lower wave disc 52, the cross sections of the first annular groove, the second annular groove, the third annular groove and the fourth annular groove are of concave arc structures, the first balls 53 are arranged between the first annular groove and the second annular groove, the second balls 54 are arranged between the third annular groove and the fourth annular groove, the caster bracket 1 and the turntable assembly 5 are in rotary connection through the first balls 53 and the second balls 54, the fastener 55 sequentially vertically penetrates through the through holes in the centers of the upper wave disc 51 and the lower wave disc 52 and is in a fastening connection together, and the mounting plate 3 is fixedly connected with the upper wave disc 51 or the fastener 55.
The perforated edge of the upper wave plate 51 and the perforated edge of the lower wave plate 52 are tightly attached together under the action of the fastening piece 55, and the perforated inner side wall of the upper wave plate 51 and the perforated inner side wall of the lower wave plate 52 are tightly attached to the outer side wall of the fastening piece 55. The second annular groove and the third annular groove are staggered in the radial direction of the annular connecting part, and the second annular groove is positioned at the outer side of the third annular groove in the radial direction, so that the thickness of the rotating part of the caster bracket 1 can be reduced, and the stability can be increased.
The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the application referred to in the present application is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.