High-stability low-gravity-center high-load trundle

Abstract

The utility model relates to the technical field of trundle bearing, and discloses a high-stability low-gravity-center high-load-capacity trundle which comprises an L-shaped wheel frame, a horizontal guide rail is fixedly connected to the upper inner wall of the L-shaped wheel frame, a reversible motor is fixedly connected to the interior of the horizontal guide rail, and the reversible motor is located at the rear end of the horizontal guide rail. The output end of the reversible motor is fixedly connected with a horizontal screw rod, and the horizontal screw rod is in threaded connection with a horizontal sliding block; the damping mechanism is composed of the U-shaped mounting frame, the damper, the damping spring and the supporting base, damping protection can be conducted on the trundle body, assembly damage caused by excessive vibration of the trundle is prevented, the adaptability of the trundle to complex terrains is enhanced, and the protection performance of the trundle is guaranteed; the gravity center adjusting mechanism is composed of the L-shaped wheel base, the horizontal guide rail, the reversible motor, the horizontal screw rod, the horizontal sliding block and the supporting base, the gravity center of the trundle can be adjusted in good time so as to meet different moving states, the loading capacity is high, the trundle can adapt to vehicles of different types, and the adaptability of the trundle is improved.

Description

Technical Field

[0001] This utility model relates to the field of caster load-bearing technology, and in particular to a high-stability, low-center-of-gravity, high-load-bearing caster. Background Technology

[0002] Existing high-stability, low-center-of-gravity, high-load-bearing casters have a fixed center of gravity and are prone to damage from vibration, resulting in limited load-bearing capacity. A Chinese patent discloses a "high-load-bearing transport trolley caster" (application number CN202421308426.9), which features a dual-mounting bracket for mounting two sets of casters, distributing the pressure across the load and effectively increasing overall load-bearing capacity. Double-layer support plates are installed on both sides of the bracket, with reinforcing ribs at the junction of the support plates and the top plate to prevent bracket deformation and ensure the caster's compatibility with high-load-bearing transport trolleys. However, this caster has a fixed center of gravity, resulting in poor adaptability to different vehicles, inability to adjust according to movement, and a lack of shock absorption, leading to insufficient load-bearing capacity and stability. Utility Model Content

[0003] To overcome the above shortcomings, this utility model provides a high-stability, low-center-of-gravity, high-load-bearing caster, which aims to improve the problem of casters being prone to vibration and damage during movement in the prior art, and at the same time solve the problem of insufficient stability caused by the excessively high center of gravity of the caster.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a high-stability, low-center-of-gravity, high-load-bearing caster, comprising an L-shaped wheel frame, a horizontal guide rail fixedly connected to the upper inner wall of the L-shaped wheel frame, a reversible motor fixedly connected inside the horizontal guide rail, the reversible motor located at the rear end of the horizontal guide rail, a horizontal screw fixedly connected to the output end of the reversible motor, and a horizontal slider threadedly connected to the horizontal screw; a U-shaped mounting bracket, the U-shaped mounting bracket located below the L-shaped wheel frame, a front unit wheel fixedly connected to the lower end of the U-shaped mounting bracket, the front unit wheel located at the four corners of the lower end of the U-shaped mounting bracket, a damper fixedly connected to the lower inner wall of the U-shaped mounting bracket, a shock-absorbing spring fixedly connected to the upper end of the damper, a support base fixedly connected to the upper end of the shock-absorbing spring, and the upper end of the support base fixedly connected to the lower end of the horizontal slider.

[0005] Furthermore, a horizontal mounting plate is fixedly connected to the upper end of the L-shaped wheel frame. The horizontal mounting plate has threaded mounting holes located at its four corners. This facilitates the installation and fixing of heavy-duty casters.

[0006] Furthermore, a rear unit wheel is fixedly connected to the lower end of the L-shaped wheel frame, and the rear unit wheels are symmetrically distributed at both ends of the L-shaped wheel frame. This improves the stability of the casters.

[0007] Furthermore, the rear end of the horizontal guide rail is fixedly connected to the rear inner wall of the L-shaped wheel frame, and horizontal grooves are provided on the left and right inner walls of the horizontal guide rail. This facilitates the limiting installation of the horizontal slider.

[0008] Furthermore, horizontal sliding rods are fixedly connected to both ends of the horizontal slider, and the horizontal slider is slidably connected to the horizontal sliding groove through the horizontal sliding rods. This facilitates the stable movement of the horizontal slider.

[0009] Furthermore, the number of damping springs is nine, and the damping springs are evenly arranged at the upper end of the damper. This is beneficial for stable damping.

[0010] Furthermore, the inner walls of the left and right sides of the U-shaped mounting bracket are provided with vertical sliding grooves to facilitate the positioning and installation of the support base.

[0011] Furthermore, vertical sliding rods are fixedly connected to both ends of the support base, and the support base is slidably connected to a vertical sliding groove via the vertical sliding rods. This facilitates the stable installation of the support base.

[0012] Furthermore, a fixed base is fixedly connected to the lower end of the U-shaped mounting bracket, and a fixed shaft is fixedly connected to the side end of the fixed base. The fixed shaft is sleeved with the front unit wheel. This facilitates the stable rotation of the front unit wheel.

[0013] This utility model has the following beneficial effects:

[0014] 1. In this utility model, a shock absorption mechanism is formed by a U-shaped mounting bracket, a damper, a shock-absorbing spring, and a support base. This mechanism can protect the caster body from shock, prevent damage to components caused by excessive vibration of the caster, enhance the caster's adaptability to complex terrain, and ensure the caster's protective performance.

[0015] 2. In this utility model, the center of gravity adjustment mechanism is composed of an L-shaped wheel seat, a horizontal guide rail, a reversible motor, a horizontal screw, a horizontal slider, and a support base. The center of gravity of the caster can be adjusted in a timely manner to meet different movement states. It has a strong load-bearing capacity and can adapt to different types of vehicles, thus improving the adaptability of the caster. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a high-stability, low-center-of-gravity, high-load-bearing caster proposed in this utility model.

[0017] Figure 2 This is a bottom view of the structure of a high-stability, low-center-of-gravity, high-load-bearing caster proposed in this utility model.

[0018] Figure 3 This is a schematic diagram of the transverse three-dimensional cross-sectional structure of a high-stability, low-center-of-gravity, high-load-bearing caster proposed in this utility model.

[0019] Figure 4 This is a longitudinal three-dimensional cross-sectional structural diagram of a high-stability, low-center-of-gravity, high-load-bearing caster proposed in this utility model.

[0020] Legend:

[0021] 1. L-shaped wheel frame; 2. Horizontal mounting plate; 3. Threaded mounting hole; 4. Vertical slide rail; 5. Vertical slide bar; 6. Horizontal slide rail; 7. Horizontal guide rail; 8. Horizontal screw; 9. Support base; 10. Fixed base; 11. Damper; 12. U-shaped mounting bracket; 13. Horizontal slide bar; 14. Front unit wheel; 15. Rear unit wheel; 16. Fixed shaft; 17. Reversible motor; 18. Shock-absorbing spring; 19. Horizontal slider. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figure 1 and Figure 3 This utility model provides an embodiment of a high-stability, low-center-of-gravity, high-load-bearing caster, comprising an L-shaped wheel frame 1, a horizontal mounting plate 2 fixedly connected to the upper end of the L-shaped wheel frame 1, threaded mounting holes 3 provided in the horizontal mounting plate 2, the threaded mounting holes 3 being located at the four corners of the horizontal mounting plate 2, a rear unit wheel 15 fixedly connected to the lower end of the L-shaped wheel frame 1, the rear unit wheels 15 being symmetrically distributed at the left and right ends of the L-shaped wheel frame 1, a horizontal guide rail 7 fixedly connected to the upper inner wall of the L-shaped wheel frame 1, the rear end of the horizontal guide rail 7 being fixedly connected to the rear inner wall of the L-shaped wheel frame 1, horizontal sliding grooves 6 provided on the left and right inner walls of the horizontal guide rail 7, a reversible motor 17 fixedly connected inside the horizontal guide rail 7, the reversible motor 17 being located at the rear end of the horizontal guide rail 7, a horizontal screw 8 fixedly connected to the output end of the reversible motor 17, a horizontal slider 19 threadedly connected to the horizontal screw 8, horizontal sliding rods 13 fixedly connected to the left and right ends of the horizontal slider 19, and the horizontal slider 19 being slidably connected to the horizontal sliding grooves 6 through the horizontal sliding rods 13;

[0024] Specifically, during the process of adjusting the center of gravity of the caster, the reversible motor 17 inside the horizontal guide rail 7 is first started. The reversible motor 17 will drive the horizontal screw 8 to rotate in both directions. The horizontal screw 8 will drive the horizontal slider 19 to move back and forth. The horizontal slider 19 will drive the U-shaped mounting bracket 12 to move back and forth. When the horizontal slider 19 drives the U-shaped mounting bracket 12 to move forward, the center of gravity of the caster will move forward. When the horizontal slider 19 drives the U-shaped mounting bracket 12 to move backward, the center of gravity of the caster will move backward.

[0025] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 A U-shaped mounting bracket 12 is located below the L-shaped wheel frame 1. A front unit wheel 14 is fixedly connected to the lower end of the U-shaped mounting bracket 12, located at the four corners of the lower end of the U-shaped mounting bracket 12. A fixing seat 10 is fixedly connected to the lower end of the U-shaped mounting bracket 12, and a fixing shaft 16 is fixedly connected to the side end of the fixing seat 10. The fixing shaft 16 is sleeved with the front unit wheel 14. Vertical sliding grooves 4 are provided on the left and right inner walls of the U-shaped mounting bracket 12. A damper 11 is fixedly connected to the lower inner wall of the mounting bracket 12. A shock-absorbing spring 18 is fixedly connected to the upper end of the damper 11. There are nine shock-absorbing springs 18, which are evenly arranged on the upper end of the damper 11. A support seat 9 is fixedly connected to the upper end of the shock-absorbing spring 18. The upper end of the support seat 9 is fixedly connected to the lower end of the horizontal slider 19. Vertical slide rods 5 are fixedly connected to the left and right ends of the support seat 9. The support seat 9 is slidably connected to the vertical slide groove 4 through the vertical slide rods 5.

[0026] Specifically, when the caster is damping, the damper 11 inside the U-shaped mounting bracket 12 will cooperate with the damping spring 18 to dampen. During the damping process, the vertical slide bar 5 on the side of the support seat 9 will slide in the vertical slide groove 4 on the inner side wall of the U-shaped mounting bracket 12. The fixed shaft 16 on the side of the fixed seat 10 is sleeved inside the front unit wheel 14, making the front unit wheel 14 more stable when rotating.

[0027] Working principle: The high-stability, low-center-of-gravity, high-load-bearing casters can adjust their center of gravity during movement. The horizontal guide rail 7 will drive the U-shaped mounting bracket 12 to move back and forth. When the U-shaped mounting bracket 12 moves forward, the center of gravity of the caster will move forward, and when the U-shaped mounting bracket 12 moves backward, the center of gravity of the caster will move backward. The damper 11 and the shock-absorbing spring 18 will work together to generate a shock-absorbing effect to protect the casters from shock.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high stability low center of gravity high load capacity caster wheel characterized by, include: L-shaped wheel frame (1), with a horizontal guide rail (7) fixedly connected to the upper inner wall of the L-shaped wheel frame (1), and a reversible motor (17) fixedly connected inside the horizontal guide rail (7). The reversible motor (17) is located at the rear end of the horizontal guide rail (7), and a horizontal screw (8) is fixedly connected to the output end of the reversible motor (17). A horizontal slider (19) is threadedly connected to the horizontal screw (8). U-shaped mounting bracket (12), the U-shaped mounting bracket (12) is located below the L-shaped wheel bracket (1), the lower end of the U-shaped mounting bracket (12) is fixedly connected to the front unit wheel (14), the front unit wheel (14) is located at the four corners of the lower end of the U-shaped mounting bracket (12), the lower inner wall of the U-shaped mounting bracket (12) is fixedly connected to the damper (11), the upper end of the damper (11) is fixedly connected to the shock-absorbing spring (18), the upper end of the shock-absorbing spring (18) is fixedly connected to the support seat (9), the upper end of the support seat (9) is fixedly connected to the lower end of the horizontal slider (19).

2. A high stability low center of gravity high load capacity caster wheel according to claim 1, characterized in that: The upper end of the L-shaped wheel frame (1) is fixedly connected to a horizontal mounting plate (2), and the horizontal mounting plate (2) is provided with threaded mounting holes (3), which are located at the four corners of the horizontal mounting plate (2).

3. The high-stability, low-center-of-gravity, high-load-bearing caster according to claim 1, characterized in that: The lower end of the L-shaped wheel frame (1) is fixedly connected to a rear unit wheel (15), which is symmetrically distributed on the left and right ends of the L-shaped wheel frame (1).

4. A high-stability, low-center-of-gravity, high-load-bearing caster according to claim 1, characterized in that: The rear end of the horizontal guide rail (7) is fixedly connected to the rear inner wall of the L-shaped wheel frame (1), and the left and right inner walls of the horizontal guide rail (7) are provided with horizontal sliding grooves (6).

5. A high-stability, low-center-of-gravity, high-load-bearing caster according to claim 1, characterized in that: The horizontal slider (19) is fixedly connected to the left and right ends of the horizontal slider (13), and the horizontal slider (19) is slidably connected to the horizontal slide groove (6) through the horizontal slide rod (13).

6. A high stability low center of gravity high load capacity caster wheel according to claim 1 wherein: The number of damping springs (18) is nine, and the damping springs (18) are evenly arranged on the upper end of the damper (11).

7. A high-stability, low-center-of-gravity, high-load-bearing caster according to claim 1, characterized in that: The U-shaped mounting bracket (12) has vertical sliding grooves (4) on its left and right inner walls.

8. A high-stability, low-center-of-gravity, high-load-bearing caster according to claim 1, characterized in that: The left and right ends of the support base (9) are fixedly connected with vertical slide rods (5), and the support base (9) is slidably connected to the vertical slide groove (4) through the vertical slide rods (5).

9. A high-stability, low-center-of-gravity, high-load-bearing caster according to claim 1, characterized in that: The lower end of the U-shaped mounting bracket (12) is fixedly connected to a fixed seat (10), and the side end of the fixed seat (10) is fixedly connected to a fixed shaft (16), which is sleeved with the front unit wheel (14).

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