Heavy industrial trundle

Abstract

The utility model discloses a heavy industrial caster which comprises a bearing bottom plate, a caster body, a caster support, a connecting shaft, a connecting sleeve and a plurality of steel balls, the caster body is in pin joint with the bottom of the caster support, the top of the caster support is fixedly connected with the connecting sleeve, a first annular groove is formed in the inner ring of the connecting sleeve, and a steel ball filling opening is formed in the side wall of the connecting sleeve. A second annular groove is formed in a shaft body of the connecting shaft, the connecting shaft is connected into the connecting sleeve in an inserted mode, the first annular groove and the second annular groove form an annular roller path, the steel balls enter the annular roller path through the steel ball filling opening, and a boss is fixedly arranged on the upper portion of the connecting shaft. A plurality of connecting holes connected with a carrier are formed in the edge of the bearing bottom plate. According to the heavy industrial trundle, the overall strength and the bearing capacity of the trundle are enhanced, the service life of the trundle is prolonged, meanwhile, the effect that one brake mechanism controls the trundle to move and rotate is achieved, and the heavy industrial trundle is high in reliability and low in cost.

Description

Technical Field

[0001] The utility model relates to the field of casters, in particular to a heavy industrial caster. Background Art

[0002] Caster is a general term, including swivel casters, fixed casters and swivel casters with brakes. The swivel caster, also known as the universal wheel, has a structure that allows 360-degree rotation. Caster is a common mechanical accessory, usually installed at the bottom of carts, suitcases, medical carts, furniture, mechanical equipment, etc. to facilitate the movement of objects. When the object moves and turns, the caster rotation system needs to rotate to achieve an easy and labor-saving effect.

[0003] Heavy industrial caster is a type of caster, and its application scenarios are usually high-load working conditions. The common structure of heavy industrial casters on the market includes a caster bracket and a caster. The caster bracket part is generally composed of a concave bottom plate after stamping, plus steel balls and a large ball tray that wraps the steel balls. A circle of grooves is formed by stamping below the large ball tray. Steel balls are placed on the grooves and covered with a small brake ball tray, and the above-mentioned components are riveted together by rivets to form the caster load-bearing and rotating caster bracket. For example, in CN201320800183.6, its rotation mainly depends on the large ball tray, small ball tray and two circles of steel balls. To increase the load-bearing capacity, steel balls with higher strength are usually used. The bottom plate and the large ball tray, and the large ball tray and the small ball tray are squeezed or rubbed by high-strength steel balls for a long time, resulting in deformation and even damage of the bottom plate, large ball tray and small ball tray, affecting the use. When the caster bears heavy loads, even safety accidents may occur. Content of the Utility Model

[0004] The purpose of the utility model is to provide a heavy industrial caster to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A heavy industrial caster includes a load-bearing bottom plate, a caster, a caster bracket, a connecting shaft, a connecting sleeve and a number of steel balls. The caster is pin-connected to the bottom of the caster bracket. The top of the caster bracket is fixedly connected to the connecting sleeve. The inner circle of the connecting sleeve is provided with a first annular groove, and a steel ball filling port is opened on the side wall of the connecting sleeve. The steel ball filling port is communicated with the first annular groove. A second annular groove is opened on the shaft body of the connecting shaft. The connecting shaft is inserted into the connecting sleeve. The first annular groove and the second annular groove form an annular raceway. The steel balls enter the annular raceway through the steel ball filling port. A boss is fixedly arranged on the upper part of the connecting shaft. A number of connecting holes for connecting with the carrier are opened on the edge of the load-bearing bottom plate. A through hole is opened in the middle of the load-bearing bottom plate. The upper edge of the boss extends into the through hole of the load-bearing bottom plate, and the lower edge of the boss is welded to the inner wall of the through hole of the load-bearing bottom plate. The upper part of the connecting shaft is welded to the lower part of the load-bearing bottom plate.

[0007] With the above structure, the force on the steel balls in the vertical direction is transferred to the connecting shaft and the connecting sleeve, reducing the extrusion between the steel balls and the bearing bottom plate, and between the large / small ball trays and the steel balls. At the same time, there is no need to punch slots on the bearing bottom plate, enhancing the strength and load-bearing capacity of the bearing bottom plate. Moreover, the structure is simple, greatly reducing the assembly difficulty compared with the background technology and having low production costs.

[0008] The present utility model is further improved and also includes a braking device, screws and nuts. A through hole is axially opened in the connecting shaft. The braking device includes a foot brake mechanism and a brake disc. The brake disc is arranged at the lower part of the connecting shaft. The screw passes through the connecting shaft and the brake disc and is connected to the nut. The foot brake mechanism includes a foot brake, a foot brake bracket and a brake pad. The foot brake bracket is fixedly arranged on the caster bracket. The foot brake and the brake pad are arranged on the foot brake bracket and the foot brake can control the lifting and lowering of the brake pad to achieve the braking of the caster.

[0009] The present utility model is further improved. A bayonet is opened at the front end of the brake pad, and a plurality of claws are annularly arranged at the lower end of the brake disc. The bayonet is arranged directly below the claws, thereby realizing the control of the rotation of the caster.

[0010] The present utility model is further improved and also includes a plug cap which can be clamped in the steel ball filling port. Firstly, it can prevent dust, and at the same time, it can achieve sealing after injecting oil into the raceway.

[0011] A heavy-duty industrial caster proposed by the present utility model enhances the overall strength and load-bearing capacity of the caster, improves the service life of the caster, and at the same time realizes the effect that a braking mechanism can control both the movement and rotation of the caster. The overall structure is simple, highly reliable, and the production and assembly are simple with low costs. Brief Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of a heavy-duty industrial caster proposed by the present utility model.

[0013] Figure 2 is Figure 1 the exploded structural diagram of

[0014] Figure 3 is the schematic structural diagram of the connecting shaft.

[0015] Figure 4 is the schematic structural diagram of the connecting sleeve.

[0016] Figure 5 is the schematic structural diagram of the braking device. Detailed Description of the Embodiment

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] Refer to Figures 1-5 , a heavy-duty industrial caster, comprising a load-bearing bottom plate 1, casters 2, caster brackets 21, a connecting shaft 3, a connecting sleeve 4, and a plurality of steel balls 5. The casters 2 are pin-connected to the bottom of the caster brackets 21. The top of the caster brackets 21 is fixedly connected to the connecting sleeve 4. A first annular groove 42 is formed in the inner ring of the connecting sleeve 4. A steel ball filling port 41 is formed in the side wall of the connecting sleeve 4, and the steel ball filling port 41 communicates with the first annular groove 42. A second annular groove 31 is formed on the shaft body of the connecting shaft 3. The connecting shaft 3 is inserted into the connecting sleeve 4. The first annular groove 42 and the second annular groove 31 form an annular raceway. The steel balls 5 enter the annular raceway through the steel ball filling port 41. A boss 32 is fixedly provided on the upper part of the connecting shaft 3. A plurality of connecting holes for connecting with a vehicle are formed at the edge of the load-bearing bottom plate 1. A through hole is formed in the middle of the load-bearing bottom plate 1. The upper edge of the boss 32 extends into the through hole of the load-bearing bottom plate 1, and the lower edge of the boss 32 is welded to the inner wall of the through hole of the load-bearing bottom plate 1. The upper part of the connecting shaft 3 is welded to the lower part of the load-bearing bottom plate 1.

[0019] With the above structure, the vertical force on the steel balls 5 is transferred to the connecting shaft 3 and the connecting sleeve 4, reducing the extrusion between the steel balls 5 and the load-bearing bottom plate 1, and the extrusion between the large / small bead discs and the steel balls 5. At the same time, there is no need to punch and groove the load-bearing bottom plate 1, enhancing the strength and load-bearing capacity of the load-bearing bottom plate 1. Moreover, the structure is simple, greatly reducing the assembly difficulty compared with the background technology, and the production cost is low.

[0020] The present utility model is further improved and further includes a braking device, a screw 9, and a nut 10. A through hole 33 is axially formed in the connecting shaft 3. The braking device includes a foot brake mechanism and a brake disc 6. The brake disc 6 is arranged at the lower part of the connecting shaft 3. The screw 9 passes through the connecting shaft 3 and the brake disc 6 and is connected to the nut 10. The foot brake mechanism includes a foot brake 7, a foot brake bracket 71, and a brake pad 8. The foot brake bracket 71 is fixedly arranged on the caster bracket 21. The foot brake 7 and the brake pad 8 are arranged on the foot brake bracket 71, and the foot brake 7 can control the lifting and lowering of the brake pad 8 to achieve the braking of the caster 2.

[0021] The present utility model is further improved. A bayonet 81 is formed at the front end of the brake pad 8. A plurality of claws 61 are arranged in a circular pattern at the lower end of the brake disc 6. The bayonet 81 is arranged directly below the claws 61, thereby realizing the control of the rotation of the caster 2.

[0022] The present utility model is further improved and further includes a plug cap 11 which can be snap-fitted into the steel ball filling port 41. On one hand, it can prevent dust, and at the same time, it can achieve sealing after injecting oil into the raceway.

[0023] A heavy-duty industrial caster proposed by the present utility model enhances the overall strength and load-bearing capacity of the caster, improves the service life of the caster, and at the same time achieves the effect that a braking mechanism controls both the movement and rotation of the caster. The overall structure is simple, with high reliability, and the production and assembly are simple, and the cost is low.

[0024] The above are only specific embodiments of the present utility model, enabling those skilled in the art to understand or implement the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but rather will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heavy-duty industrial caster, characterized in that: It includes a load-bearing bottom plate, casters, caster brackets, a connecting shaft, a connecting sleeve and a number of steel balls. The casters are pin-connected to the bottom of the caster brackets. The top of the caster brackets is fixedly connected to the connecting sleeve. A first annular groove is formed in the inner ring of the connecting sleeve, and a steel ball filling port is formed in the side wall of the connecting sleeve. The steel ball filling port is communicated with the first annular groove. A second annular groove is formed on the shaft body of the connecting shaft. The connecting shaft is inserted into the connecting sleeve. The first annular groove and the second annular groove form an annular raceway. The steel balls enter the annular raceway through the steel ball filling port. A boss is fixedly arranged on the upper part of the connecting shaft. A number of connecting holes for connecting with the vehicle are formed at the edge of the load-bearing bottom plate. A through hole is formed in the middle of the load-bearing bottom plate. The upper edge of the boss extends into the through hole of the load-bearing bottom plate, and the lower edge of the boss is welded to the inner wall of the through hole of the load-bearing bottom plate. The upper part of the connecting shaft is welded to the lower part of the load-bearing bottom plate.

2. The heavy-duty industrial caster according to claim 1, characterized in that: It further includes a braking device, screws and nuts. A through hole is axially formed in the connecting shaft. The braking device includes a foot brake mechanism and a brake disc. The brake disc is arranged at the lower part of the connecting shaft. The screw passes through the connecting shaft and the brake disc and is connected to the nut. The foot brake mechanism includes a foot brake, a foot brake bracket and a brake pad. The foot brake bracket is fixedly arranged on the caster bracket. The foot brake and the brake pad are arranged on the foot brake bracket, and the foot brake can control the lifting and lowering of the brake pad.

3. The heavy-duty industrial caster according to claim 2, wherein: A bayonet is formed at the front end of the brake pad, and a number of claws are annularly arranged at the lower end of the brake disc. The bayonet is arranged directly below the claws.

4. A heavy-duty industrial caster according to claim 1, characterized in that: It further includes a plug cap, and the plug cap can be clamped in the steel ball filling port.

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