Welded heavy-duty shock absorbing caster

Abstract

The utility model discloses a kind of welding heavy shock-absorbing universal caster, including bottom plate, support and wheel body, support includes top cover and two legs, bottom plate is connected with top cover by rotating structure, support shaft is equipped between the front end of two legs, wheel body is rotatably installed on the support shaft, top cover is integrally made by top plate and its below fixed frame, two legs are stretched into the fixed frame and are rotatably connected with it by rotating shaft, the rear end of the two legs has installation slot with opening downwards, the installation slot forms a mounting cavity in the fixed frame, elastic component for providing elastic buffer force is equipped in the mounting cavity, limiting rod is equipped on the fixed frame and above installation slot. The utility model is when through uneven road surface, wheel jumps upwards, the front end of leg rotates upwards around rotating shaft, its rear end then generates downward pressure on elastic component, shock-absorbing effect is generated under the action of compressing elastic component, shock-absorbing structure is simple, low in cost, and shock-absorbing effect is good.

Description

Technical Field

[0001] This utility model relates to a caster for transportation vehicles, and more particularly to a welded heavy-duty shock-absorbing swivel caster. Background Technology

[0002] Currently, casters used in transportation vehicles have the following structural defects:

[0003] (1) The caster bracket has many components and the shock absorption structure of the caster is complex.

[0004] (2) The rotating structure between the base plate and the support usually adopts a large and small ball bearing and steel ball structure, which is complex. Utility Model Content

[0005] The purpose of this utility model is to provide a welded heavy-duty shock-absorbing universal caster with simple structure, low cost and good shock absorption effect.

[0006] The purpose of this utility model is achieved through the following technical measures: a welded heavy-duty shock-absorbing omnidirectional caster, comprising a base plate, a bracket, and a wheel body, wherein the bracket comprises a top cover and two legs, the base plate is connected to the top cover via a rotating structure, a support shaft is provided between the front ends of the two legs, and the wheel body is rotatably mounted on the support shaft, characterized in that the top cover is integrally formed by a top plate and a fixed frame below it, the two legs extend rearward into the fixed frame and are rotatably connected to it via a rotating shaft, the rear ends of the two legs have downward-opening mounting grooves, the mounting grooves are located within the fixed frame to form a mounting cavity, an elastic component for providing elastic buffering force is provided in the mounting cavity, and a limiting rod is provided on the fixed frame above the mounting groove.

[0007] When the present invention passes over uneven road surfaces, the wheels bounce upwards, the front end of the outrigger rotates upwards around the pivot axis, and the rear end exerts downward pressure on the elastic component. Under the action of compressing the elastic component, a shock absorption effect is produced. The shock absorption structure of the present invention is simple, low in cost, and has a good shock absorption effect.

[0008] The elastic component of this utility model consists of a block-shaped spring seat and a pair of springs. The spring seat has a pair of hollow cylindrical cavities with open lower ends. The springs are disposed in the cavities and the lower ends of the springs are fixed to the fixing frame. The rear side of the mounting groove is open and a baffle for limiting the spring seat is provided on this side.

[0009] The rotating structure of this utility model includes a main shaft, a double-row thickened deep groove ball bearing, and a bearing housing at the bottom of the base plate. The main shaft is mounted on the top plate of the top cover, and the double-row thickened deep groove ball bearing is fitted onto the main shaft and installed within the bearing housing. This utility model uses a double-row thickened deep groove ball bearing instead of the existing large and small ball bearing structure, resulting in fewer parts, a high degree of standardization, a simple installation process, and low cost.

[0010] The surfaces of the base plate and bracket described in this invention are treated with blue paint.

[0011] The present invention has a braking mechanism installed on the support shaft, which is a double-snap-fit ​​braking mechanism or a fork-type braking mechanism.

[0012] The thickness of the rubber coating layer of the wheel body described in this utility model is 23mm or more.

[0013] The double-row thickened deep groove ball bearing described in this utility model is a model 3205-2RS precision bearing.

[0014] Compared with the prior art, the present invention has the following significant advantages:

[0015] (1) When the present invention passes over uneven road surfaces, the wheels bounce upwards, the front end of the outrigger rotates upwards around the pivot axis, and its rear end exerts downward pressure on the elastic component. Under the action of compressing the elastic component, a shock absorption effect is produced. The shock absorption structure of the present invention is simple, low in cost, and has a good shock absorption effect.

[0016] (2) This utility model uses a double-row thickened deep groove ball bearing to replace the existing large and small ball disc structure, which has fewer parts, a high degree of standardization, a simple installation process, and low cost.

[0017] (3) The bracket of this utility model consists of a top cover and legs. The bracket has few components, a simple structure, and is easy to manufacture. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 This is an exploded view of the structure of this utility model;

[0021] Figure 3 This is a side view of the present invention;

[0022] Figure 4 This is a rear view of the present invention.

[0023] In the diagram: 1-base plate, 2-bracket, 3-wheel body, 4-top cover, 5-support leg, 6-support shaft, 7-fixed frame, 8-top plate, 9-rotating shaft, 10-mounting groove, 11-mounting cavity, 12-limiting rod, 13-spring seat, 14-spring, 15-baffle, 16-main shaft, 17-double row thickened deep groove ball bearing, 18-bearing seat, 19-brake mechanism, 20-front side wall. Detailed Implementation

[0024] like Figures 1-4 As shown, this utility model discloses a welded heavy-duty shock-absorbing omnidirectional caster, comprising a base plate 1, a bracket 2, and a wheel body 3. The bracket 2 includes a top cover 4 and two legs 5. The base plate 1 is connected to the top cover 4 via a rotating structure. A support shaft 6 is provided between the front ends of the two legs 5, and the wheel body 3 is rotatably mounted on the support shaft 6. The top cover 4 is integrally formed by a top plate 8 and a fixing frame 7 below it. The two legs 5 extend rearward into the fixing frame 7 and are rotatably connected to it via a rotating shaft 9. The rear ends of the two legs 5 have downward-opening mounting grooves 10, which form a mounting cavity 11 within the fixing frame 7. An elastic component for providing elastic buffering force is provided in the mounting cavity 11. A limiting rod 12 is provided on the fixing frame 7 above the mounting groove 10. The inner and outer plates of the legs 5 are stamped, bent, and welded, resulting in less material usage, high rigidity, and low cost.

[0025] In this embodiment, the elastic component consists of a block-shaped spring seat 13 and a pair of springs 14. The springs 14 have a diameter of 25mm. The spring seat 13 has a pair of hollow cylindrical chambers with openings at the lower ends. The springs 14 are disposed in the chambers and their lower ends are fixed to the fixing frame 7. The mounting groove 10 is a rectangular groove with an opening only on the rear side, where a baffle 15 is provided for limiting the spring seat 13. The other three sides have sidewalls, including two sidewalls and a front sidewall 20, so that the spring seat 13 is limited within the mounting cavity 11. During installation, the spring seat 13 is inserted into the mounting cavity through the opening between the baffle 15 and the fixing frame 7. During the insertion process, the spring is in a compressed state, and after insertion, the spring returns to its original shape. This utility model uses a combination of high-strength springs and PU spring seats for shock absorption, resulting in a simplified structure and easy installation.

[0026] This utility model limits the maximum downward rotation of the outrigger 5 by limiting the rod 12. When passing over an uneven road surface, the wheel bounces upward, the front end of the outrigger 5 rotates upward around the pivot 9, and its rear end exerts downward pressure on the elastic component, producing a shock absorption effect under the action of compressing the elastic component.

[0027] The rotating structure includes a main shaft 16, a double-row thickened deep groove ball bearing 17, and a bearing housing 18 at the bottom of the base plate 1. The main shaft 16 is mounted on the top plate 8 of the top cover 4. The double-row thickened deep groove ball bearing 17 is fitted onto the main shaft 16 and installed within the bearing housing 18. The double-row thickened deep groove ball bearing is a model 3205-2RS precision bearing. The main shaft 16 has a diameter of 25mm, high load capacity, and is not easily deformed. Using a double-row thickened deep groove ball bearing instead of the existing large and small ball bearing structure reduces the number of parts, increases standardization, simplifies the installation process, and lowers costs.

[0028] A brake mechanism 19 is installed on the support shaft 6. The brake mechanism 19 adopts a double snap-on brake mechanism or a fork-in brake mechanism.

[0029] Wheel 3 uses a cast iron core polyurethane wheel with a built-in 6204 bearing and a 6204 plastic dust cover. The rubber coating of wheel 3 is more than 23mm thick, making it lighter, longer in service life, and reducing usage costs.

[0030] The surfaces of the base plate 1 and the bracket 2 are treated with blue paint. The blue paint thickness on the base plate is 6mm, the blue paint thickness on the top plate and the fixed frame is 5mm, and the blue paint thickness on the legs is 6mm.

[0031] The embodiments of this utility model are not limited thereto. Based on the above content of this utility model and in accordance with the common technical knowledge and conventional means in this field, this utility model can also be modified, replaced or changed in various other forms, all of which fall within the scope of protection of this utility model.

Claims

1. A welded heavy-duty shock-absorbing swivel caster, comprising a base plate, a bracket, and a wheel body, wherein the bracket includes a top cover and two legs, the base plate is connected to the top cover via a rotating structure, a support shaft is provided between the front ends of the two legs, and the wheel body is rotatably mounted on the support shaft, characterized in that: The top cover is integrally formed by a top plate and a fixed frame below it. Two legs extend backward into the fixed frame and are rotatably connected to it via a pivot. The rear ends of the two legs have downward-facing mounting grooves. The mounting grooves are located within the fixed frame to form a mounting cavity. An elastic component for providing elastic buffering force is provided in the mounting cavity. A limiting rod is provided on the fixed frame and above the mounting groove.

2. The welded heavy-duty shock-absorbing swivel caster according to claim 1, characterized in that: The elastic component consists of a block-shaped spring seat and a pair of springs. The spring seat has a pair of hollow cylindrical chambers with open lower ends. The springs are disposed in the chambers and the lower ends of the springs are fixed to the fixing frame. The rear side of the mounting groove is open and a baffle for limiting the spring seat is provided on this side.

3. The welded heavy-duty shock-absorbing swivel caster according to claim 2, characterized in that: The rotating structure includes a main shaft, a double-row thickened deep groove ball bearing, and a bearing seat at the bottom of the base plate. The main shaft is located on the top plate of the top cover, the double-row thickened deep groove ball bearing is mounted on the main shaft, and the double-row thickened deep groove ball bearing is installed in the bearing seat.

4. The welded heavy-duty shock-absorbing swivel caster according to claim 3, characterized in that: The surfaces of the base plate and the bracket are treated with blue paint.

5. The welded heavy-duty shock-absorbing swivel caster according to claim 4, characterized in that: A braking mechanism is installed on the support shaft.

6. The welded heavy-duty shock-absorbing swivel caster according to claim 5, characterized in that: The braking mechanism adopts a double-clamp braking mechanism or a fork-type braking mechanism.

7. The welded heavy-duty shock-absorbing swivel caster according to claim 6, characterized in that: The thickness of the rubber coating layer on the wheel body is 23mm or more.

8. The welded heavy-duty shock-absorbing swivel caster according to claim 7, characterized in that: The double-row thickened deep groove ball bearing is a model 3205-2RS precision bearing.

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