CN108128094A - It is a kind of with the vibration damping universal wheel unit that can be braked - Google Patents

Abstract

A brakeable vibration-damping universal wheel device, the other end of the universal shaft is provided with an annular long groove, the lower end of the thick gasket is provided with a shock-absorbing spring, the thick gasket is provided with a spherical groove, the universal shaft and Balls are arranged between the thick gaskets, and the spring damping mechanism is set in the hole of the universal shaft. When the screw is clamped, it is clamped in the annular long groove on the universal shaft. Installed on the wheel seat, the roller shaft is connected with the floating block through the limit strip groove, and the two ends of the roller shaft are respectively connected and fixed with the roller. There is a spring in the hole, a sliding keyway is set on the underside of the inner spring hole, a limit bar groove is set on the wheel seat, and the roller shaft is set through the limit bar groove, and the spring is clamped in the middle of the floating block through the inner spring buckle, and the floating The block is snap-connected with the sliding keyway; the invention can make the universal wheel perform vibration-absorbing motion when impacted, and brake when necessary.

Description

A kind of anti-vibration universal wheel device with brake

technical field

The invention relates to a vibration-damping wheel device, in particular to a brake-damping universal wheel device.

Background technique

Vibration damping wheels have important applications in various fields. Universal wheels are also called movable casters. Its structure allows horizontal free rotation. It is widely used in many industries and various fields, such as daily necessities bags, baby carriages, trolleys, etc., medical equipment, Furniture, logistics equipment, warehousing, chassis, cabinets, production lines, large supermarkets, etc.

The existing universal wheels for luggage are mainly composed of a tray (also called wrap angle), a universal shaft, a wheel seat and a roller. The roller is installed on the wheel seat. It has an annular groove and is inserted into the wheel seat. The wheel seat can rotate freely relative to the cardan shaft. One side of the wheel seat corresponds to the annular groove on the cardan shaft and penetrates the pin. The shaft is connected with the wheel seat. The universal wheel for luggage has the following technical defects when in use, because there is no vibration damping device, when the luggage is dragged, the rollers will vibrate when they come into contact with the ground.

In railway stations, subway stations and other places where there are ramp anti-slip speed bumps and the road surface is uneven, when the trolley case passes through the deceleration anti-slip belt and the potholes, the rollers respond to the excitation of the road surface, and the pulleys of the trolley case and the case The body is rigidly connected, and the potholes make the box vibrate, which is likely to cause damage to the digital electronic products and fragile items that are afraid of vibration in the box. Wrapping soft or inflatable items will increase the luggage volume, which is not conducive to long-distance travel.

In order to solve the problem of vibration reduction of universal wheels commonly used today, the present invention designs vibration-damping springs at two places inside the wheel base to avoid damage to items caused by vibration during carrying.

Contents of the invention

The object of the present invention is to provide a brakeable vibration-damping universal wheel device, which mainly solves the deficiency of the current universal wheel's vibration-damping direction. Response, the pulleys of the trolley case are rigidly connected to the case body, and the potholes on the road will cause the case body to vibrate, which is likely to cause damage to the digital electronic products and fragile items that are afraid of vibration in the case. .

In order to achieve the above object, the technical solution of the present invention is: a brakeable damping universal wheel device, including a tray, a spring damping mechanism, a second spring damping mechanism and a brake structure, the spring damping mechanism includes a thick Spacers, damping springs, balls and cardan shafts, the upper end of the cardan shaft is fixed to the tray, the tray is provided with a shoulder hole, the other end of the cardan shaft is provided with a circular long groove, the lower end of the thick gasket A shock-absorbing spring is provided, a spherical groove is provided on the thick gasket, balls are arranged between the cardan shaft and the thick gasket, the spring shock-absorbing mechanism is arranged in the hole of the cardan shaft, and it is clipped on the cardan shaft when the screw is clamped. In the long annular groove on the

The second spring damping mechanism includes wheel seat, roller, floating block, limit bar groove, spring, sliding keyway, roller shaft, built-in spring buckle and built-in spring hole. Roller is installed by sliding block in the second spring damping mechanism On the wheel seat, the roller shaft is connected with the floating block through the limit strip groove, and the two ends of the roller shaft are respectively connected and fixed with the roller. The inner side of the roller is provided with cylindrical teeth, and the inner spring hole is arranged in the wheel seat. The inner spring hole A spring is arranged inside, and a sliding keyway is arranged on the lower side of the inner spring hole, the wheel seat is provided with a limiting bar-shaped groove, and the roller shaft is set through the limiting bar-shaped groove, and the spring is clamped in the middle of the floating block through a built-in spring buckle. The floating block is engaged with the sliding keyway;

The wheel seat is provided with a brake button, and the brake button is provided with a brake shaft, and the brake button can be braked by clamping the brake shaft with the cylindrical teeth when the brake button is pressed.

As a preferred technical solution, the ball and the cardan shaft are set in point contact.

As a preferred technical solution, the limiting bar-shaped groove is set in an oval shape.

Compared with the prior art, the friendship effect of the present invention lies in:

(1) The invention can make the universal wheel perform vibration-absorbing motion when it is impacted, and brake when necessary. It has beautiful appearance, simple structure, easy assembly, replaceable and low cost.

(2) The present invention is equipped with a spring shock absorbing mechanism, a second spring shock absorbing mechanism, and a brake mechanism. The ball and the cardan shaft are in point contact, which minimizes the constraint of frictional resistance on the free rotation of the cardan shaft. , this structure increases the free rotation of the cardan shaft as much as possible.

(3) The cardan shaft of the present invention is provided with an annular long groove, which is engaged with the engaging screw so that the damping spring 8 can perform vibration-absorbing movement within the elastic range.

(4) The spring provided inside the wheel seat of the present invention solves the defects that the external spring is not beautiful and the structure is easily damaged.

(5) The built-in hole of the present invention is provided with a sliding keyway for the floating block, which can guide the floating block to slide on the track, reducing the impact response caused by the vibration-damping sliding.

(6) In the present invention, when the universal wheel passes through the deceleration anti-skid belt and the potholed road surface, the roller is stimulated by the road surface to generate a response. At this time, the roller is impacted by an external force, and the roller absorbs vibration through the spring to make the roller damp the vibration up and down in the limit strip groove scroll.

(7) In the present invention, the keyway of the floating block provided in the built-in hole of the roller is coated with lubricating grease, which can increase the vibration reduction effect and improve the service life of the universal wheel, and the roller can be disassembled to replace the spring.

(8) The present invention is applicable to daily necessities such as bags, baby carriages, trolleys, etc., medical equipment, furniture, etc.

Description of drawings

Accompanying drawing 1 is the structural sectional view of damping wheel;

Accompanying drawing 2 is a sectional view of the built-in hole structure of the roller in the figure;

Accompanying drawing 3 is the partial sectional view of wheel base 9 among the figure;

Accompanying drawing 4 is the axonometric view of roller 17 among the figure.

Accompanying drawing 5 is the axonometric view of brake button 13 in the figure.

In the figure, shoulder hole 1, tray 2, cardan shaft 3, annular long groove 4, ball 5, spherical groove 6, thick washer 7, spring 8, wheel seat 9, clip screw 10, spring buckle 11, spring 12. Brake button 13, keyway 14, floating block 15, roller shaft 16, roller 17, cylindrical tooth 18, brake shaft 19, limit strip groove 20, cardan shaft hole 21, built-in spring hole 22.

Detailed ways

Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

With reference to accompanying drawing 1-accompanying drawing 5, a kind of anti-vibration universal wheel device that can brake, comprises tray 2, spring shock-absorbing mechanism, second spring

Shock absorbing mechanism and brake structure, the spring shock absorbing mechanism includes thick gasket 7, shock absorbing spring 8, ball 5 and cardan shaft 3, the upper end of cardan shaft 3 is fixed with the tray 2, and the tray 2 is provided with a shaft shoulder hole 1. The other end of the cardan shaft 3 is provided with an annular long groove 4, the lower end of the thick gasket 7 is provided with a shock absorbing spring 8, and the thick gasket 7 is provided with a spherical groove 6, and the cardan shaft 3 and the thick gasket 7 is provided with a ball 5, and the spring damping mechanism is arranged in the cardan shaft hole 21, and when the screw is clamped, it is clamped in the annular long groove 4 on the cardan shaft 3, and the ball 5 and the cardan shaft 3 are set as The point contact minimizes the constraint of frictional resistance on the free rotation of the universal wheel 3, and this structure increases the free rotation of the universal wheel as much as possible.

The second spring damping mechanism includes a wheel seat 9 , a roller 17 , a floating block 15 , a limit bar groove 20 , and a spring 12 . The sliding keyway 14, the roller shaft 16, the built-in spring buckle 11 and the built-in spring hole 22 described in the second spring damping mechanism, the roller 17 is installed on the wheel seat 9 through the sliding block 15, and the roller shaft 16 passes through the limit strip groove 20 and The floating block 15 is connected, and the two ends of the roller shaft 16 are respectively connected and fixed with the roller 17. The inner side of the roller is provided with a cylindrical tooth 18, the wheel seat 9 is provided with a built-in spring hole 22, and the built-in spring hole 22 is provided with a spring 12. To eliminate the defects of unsightly external springs and easily damaged structures, the underside of the inner spring hole 22 is provided with a sliding keyway 14, which can guide the floating block to slide on a track, reducing the impact response caused by the vibration-damping sliding. When the universal wheel passes through the deceleration anti-skid belt and the potholed road surface, the roller 17 responds to the excitation of the road surface. At this time, the roller is impacted by an external force, and the vibration is absorbed by the spring 12 to make the roller roll up and down in the limiting strip groove 20.

The wheel seat 9 is provided with a limiting bar-shaped groove 20, the limiting bar-shaped groove 20 is set to an oval shape, the roller shaft 16 is set through the limiting bar-shaped groove 20, and the spring 12 is snapped on the floating block 15 through the built-in spring buckle 11 In the middle, the floating block 15 is clamped and connected with the sliding keyway 14;

The wheel seat 9 is provided with a brake button 13, and the brake button 13 is provided with a brake shaft 19. Pressing the brake button 13, the brake shaft 19 can be engaged with the cylindrical teeth 18 for braking. When the roller is still and needs to be locked, the brake can be activated When the button 13 is pressed, the brake shaft and the cylindrical tooth 18 are clamped and braked; when the brake needs to be released, the brake button 13 can be lifted to the original position.

As an example, the keyway of the floating block set in the built-in hole of the roller 17 is coated with grease to increase the vibration reduction effect and improve the service life of the universal wheel. When the built-in spring 12 has poor vibration reduction effect, the roller can be removed and replaced. And add grease.

As an embodiment, the floating block 15 is provided with a sliding keyway 14 in the built-in hole, which can guide the floating block to do track sliding, and the dynamic performance analysis of the vibration damping wheel in the rolling process is carried out. It is completely within the distance of the keyway, and will not cause movement impact on the top of the keyway so as to damage the ring structure.

As an example, the end of the clamping screw 10 is clamped with the annular long groove 4. When the universal wheel passes the deceleration anti-skid belt and the potholed road surface, the roller 17 responds to the excitation of the road surface. At this time, the roller is impacted by an external force. , shock-absorbing spring 8 compresses after absorbing the shock, makes the wheel base 9 drive the roller as a whole to buffer and move up and down along the annular long groove 4, wherein the elastic range of the shock-absorbing spring 8 is within the length of the annular long groove 4.

As an example, the bottom of the tray 2 is provided with a shoulder hole 1 mainly to prevent the wheel base 9 from moving up to impact the shaft shoulder when the shock absorbing spring 8 absorbs vibration, and avoiding friction with the wheel base 9 to damage the structure of the parts.

As an embodiment, a spherical groove 6 is provided above the thick gasket 7, mainly to prevent the wheel base 9 from being difficult to rotate freely due to the rebound effect of the damping spring 8, and a spherical groove 6 is provided below the ball 5 to utilize the ball The gravity and extrusion effect of 5 itself make it difficult for the steel ball to shift position, which greatly improves the stability of rolling, and makes point contact on the top of the ball 5, which greatly reduces frictional resistance.

In describing the present invention, it should be understood that the terms "one end", "front upper", "end", "length", "width", "inner", "upper", "another end", "both The orientation or positional relationship indicated by "end", "horizontal", "coaxial", "bottom", "below" and so on are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and It is not to indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, or operate in a particular orientation, and thus should not be construed as limiting the invention.

In the present invention, unless otherwise clearly specified and limited, the terms "arrangement", "engagement", "connection", "embedded", "cover" and other terms should be understood in a broad sense, for example, it may be a fixed connection, It can also be detachable connection, or integrated; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction of two components relationship, unless expressly defined otherwise. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

The above is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made by the content of the specification of the present invention, or direct or indirect use of the technical fields attached to other related products, are all the same. The theory is included in the patent protection scope of the present invention.

Claims (3)

1. It is 1. a kind of with the vibration damping universal wheel unit that can be braked, it is characterised in that：Including pallet（2）, spring shock absorption mechanism, second Spring shock absorption mechanism and brake structure, spring shock absorption mechanism include hassock piece（7）, damping spring（8）, ball（5）And universal shaft （3）, universal shaft（3）Upper end and pallet（2）It is mutually fixed, pallet（2）It is equipped with shaft shoulder hole（1）, the universal shaft（3）It is another End is provided with annular long recess（4）, hassock piece（7）Lower end is provided with damping spring（8）, it is provided on hassock piece (7) arc-shaped Spherical groove (6), universal shaft (3) and hassock piece（7）Between be provided with ball（5）, spring shock absorption mechanism is arranged on universal axis hole （21）It is interior, it is connected to universal shaft when being clamped screw（3）On annular long recess（4）It is interior；

   Second spring damping includes wheel seat（9）, idler wheel（17）, rocker piece（15）, limiting bar-shaped trough（20）, spring（12）； Sliding keyway（14）, roller shaft（16）, built-in snak link（11）With built-in spring eye（22）In the second spring damping Idler wheel（17）Pass through sliding shoe（15）Mounted on wheel seat（9）On, roller shaft（16）By limiting bar-shaped trough（20）With rocker piece （15）Connection, roller shaft（16）Both ends respectively with idler wheel（17）Connection is fixed, and columnar tooth is provided on the inside of the idler wheel（18）, wheel Seat（9）Inside it is provided with built-in spring eye（22）, built-in spring eye（22）Inside it is provided with spring（12）, built-in spring eye（22）Under Side is provided with sliding keyway（14）, wheel seat（9）It is provided with limiting bar-shaped trough（20）, roller shaft（16）Across limiting bar-shaped trough（20） Setting, the spring（12）Pass through built-in snak link（11）It is connected to rocker piece（15）Centre, rocker piece（15）With sliding keyway （14）Clamping connection；

   Wheel seat（9）It is provided with brake button（13）, brake button（13）On be provided with brake axle（19）, brake button（13）Pressing Brake axle can be passed through（19）With columnar tooth（18）Clamping is braked.
2. It is 2. according to claim 1 a kind of with the vibration damping universal wheel unit that can be braked, it is characterised in that：Ball（5）With Universal shaft（3）It is set as point contact.
3. 3. a kind of vibration damping wheel according to claim 1, it is characterised in that：Limiting bar-shaped trough (20) is set as ellipse.