Anti-skid trundle self-adaptive to concave-convex ground

Abstract

The utility model relates to the technical field of anti-skid trundles, in particular to an anti-skid trundle self-adaptive to a concave-convex ground, which comprises a main connecting plate, a main wheel and at least two auxiliary wheels, the upper end of the main connecting plate is connected with an equipment main body through a rotary connecting mechanism, the main wheel is arranged below the main connecting plate, and the auxiliary wheels are arranged below the main connecting plate. The auxiliary wheels are connected with the main connecting plate through vertical damping mechanisms, symmetrically arranged on the two sides of the main wheel and hinged to the bottoms of the vertical damping mechanisms through hinge shafts, and swing damping mechanisms are arranged between the auxiliary wheels and the vertical damping mechanisms. The multi-wheel synergistic effect can disperse impact force, meanwhile, the vertical damping mechanism can disperse impact force in the vertical direction, when the swing damping mechanism encounters a concave-convex road surface, the auxiliary wheel can swing up and down with a hinge shaft as the center and actively fit the fluctuation of the road surface, and equipment jamming or toppling caused by suspension of a single main wheel is avoided.

Description

Technical Field

[0001] This utility model relates to the field of anti-slip caster technology, and in particular to an anti-slip caster that adapts to uneven ground. Background Technology

[0002] In modern logistics, warehousing, and daily life, mobile devices such as trolleys and pallet trucks widely use casters as their walking components. Traditional casters typically adopt a single-wheel structure, which is connected to the main body of the equipment through a bearing, enabling free steering and providing good flexibility and maneuverability on flat surfaces.

[0003] However, because this single-wheel structure relies on only one wheel for load-bearing, when encountering uneven road surfaces such as potholes or bumps, the wheel is very likely to get stuck in the potholes or be lifted off the ground, causing the entire wheel to be completely suspended in the air. Once suspended, the wheel loses contact with the ground and cannot obtain ground friction, thus losing driving force and making the equipment unable to move normally. In addition, the suspension of a single wheel will also disrupt the original balance of the equipment, causing the center of gravity of the equipment to shift and increasing the risk of tipping over. Especially when carrying heavy objects, it may cause the goods to tip over or be damaged.

[0004] Based on the above situation, it is necessary to design an anti-slip caster that adapts to uneven ground to solve the above problems. Utility Model Content

[0005] This invention provides an anti-slip caster that adapts to uneven surfaces to solve the problems in the prior art.

[0006] The technical problem solved by this utility model is achieved by the following technical solution:

[0007] An adaptive anti-slip caster for uneven surfaces includes a main connecting plate, a main wheel, and at least two auxiliary wheels. The upper end of the main connecting plate is connected to the main body of the equipment via a rotating connecting mechanism. The main wheel is located below the main connecting plate and is connected to the main connecting plate via a vertical shock-absorbing mechanism. It is symmetrically located on both sides of the main wheel and is hinged to the bottom of the vertical shock-absorbing mechanism via a hinge shaft. A swing shock-absorbing mechanism is provided between the auxiliary wheel and the vertical shock-absorbing mechanism. When the auxiliary wheel contacts the uneven surface, it can swing around the hinge shaft, causing the auxiliary wheel to move up and down to adapt to the undulations of the surface.

[0008] Preferably, the swing damping mechanism includes an arc-shaped rod on the auxiliary wheel and an arc-shaped sleeve on the vertical damping mechanism. The arc-shaped rod is slidably connected to the inside of the arc-shaped sleeve, and a first spring connects the arc-shaped rod and the arc-shaped sleeve.

[0009] Preferably, the vertical damping mechanism includes a main body base and a main body column slidably connected inside the main body base. The main body column is connected to the main connecting plate, and a second spring is connected between the main body column and the main body base.

[0010] Preferably, dampers are provided between the arc-shaped rod and the arc-shaped sleeve, and between the main column and the main seat.

[0011] Preferably, the rotating connection mechanism includes a connecting column connected to the main connecting plate and a bearing disposed on the connecting column.

[0012] Preferably, the grounding height of the auxiliary wheel is higher than that of the main wheel.

[0013] The beneficial effects of this utility model are: by symmetrically arranging at least two auxiliary wheels on both sides of the main wheel, the multiple wheels can work together to disperse the impact force. At the same time, the vertical shock absorption mechanism can disperse the vertical impact force. When encountering uneven road surfaces, the auxiliary wheels of the swing shock absorption mechanism can swing up and down around the hinge axis to actively conform to the road surface undulations, avoiding equipment jamming or tipping caused by a single main wheel being suspended in the air. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 A three-dimensional structural schematic diagram provided for this utility model;

[0016] Figure 2 A front view structural schematic diagram provided for this utility model;

[0017] Figure 3 A cross-sectional structural schematic diagram provided for this utility model;

[0018] Figure 4 This utility model Figure 3 Enlarged schematic diagram of the structure at point A;

[0019] Figure 5 This is a structural schematic diagram of the present invention when driving on uneven road surfaces.

[0020] In the diagram, 1. Main connecting plate; 2. Rotating connecting mechanism; 21. Connecting column; 22. Bearing; 3. Main wheel; 4. Vertical damping mechanism; 41. Main seat; 42. Main column; 5. Auxiliary wheel; 6. Hinge shaft; 7. Swinging damping mechanism; 71. Arc rod; 72. Arc sleeve; 8. First spring; 9. Damper; 10. Second spring. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0022] Reference Figures 1-5 As shown, an adaptive anti-slip caster for uneven surfaces includes a main connecting plate 1. During installation, the upper end of the main connecting plate 1 is mounted on the main body of the equipment (such as a trolley or pallet trolley) via a rotating mechanism. A main wheel 3 is located below the main connecting plate 1, and at least two auxiliary wheels 5 are symmetrically arranged on both sides of the main wheel 3. In actual use, an even number of auxiliary wheels 5, such as 4 or 6, can be set as needed, symmetrically arranged on both sides of the main wheel 3 to improve load-bearing capacity and stability. To adapt to the undulations of uneven surfaces and to reduce shock during movement, the main wheel 3 and auxiliary wheels 5 have swing arms, which are hinged to a vertical shock-absorbing mechanism 4 via hinge shafts 6. This disperses the vertical impact force of items on the mobile device during movement. Simultaneously, a swinging shock-absorbing mechanism 7 is provided between the auxiliary wheels 5 and the vertical shock-absorbing mechanism 4. For example, when encountering a raised surface... The auxiliary wheel 5 first moves forward with the mobile device, contacting the edge of the raised road surface. Then, the swing arm on the auxiliary wheel 5 begins to swing upward around the hinge shaft 6, simultaneously acting on the swing damping mechanism 7 for shock absorption. The auxiliary wheel 5 then climbs along the convex surface, causing it to swing upward during this process. As the mobile device moves forward, when the auxiliary wheel 5 descends from the convex surface into a flat or concave road section, the swing damping mechanism 7 generates a counterclockwise torque around the hinge shaft 6, actively causing the swing arm to swing the auxiliary wheel 5 downward. During this process, the up-and-down swing of the auxiliary wheel 5 actively conforms to the undulations of the road surface, preventing the equipment from jamming or tipping over due to the single main wheel 3 being suspended in the air. At the same time, the auxiliary wheel 5 can automatically adjust the overall center of gravity of the casters under the action of the swing damping mechanism 7, maintaining the horizontal posture of the equipment and preventing the center of gravity from shifting or the goods from slipping due to the tilt of the ground.

[0023] Reference Figure 4 , Figure 5As shown, furthermore, to improve the adaptive effect of the caster, the swing damping mechanism 7 includes an arc-shaped rod 71 on the auxiliary wheel 5 and an arc-shaped sleeve 72 on the vertical damping mechanism 4. When traveling on uneven surfaces, the curved contours of the arc-shaped rod 71 and the arc-shaped sleeve 72 match each other. The arc-shaped rod 71 slides within the arc-shaped sleeve 72, forcing the auxiliary wheel 5 to swing around the hinge axis 6 along a preset arc trajectory, precisely conforming to the undulations of the ground and avoiding disorderly shaking. For example, in an uphill scenario, when the convex slope pushes the auxiliary wheel 5 to swing upward, the arc-shaped rod 71 slides along the upper arc surface of the arc-shaped sleeve 72, guiding the swing direction to be tangent to the uphill angle, reducing vertical impact. In a downhill scenario, when the auxiliary wheel 5 sinks, the arc-shaped rod 71 slides along the lower arc surface, guiding the auxiliary wheel 5 to swing smoothly through the curved surface, avoiding a "sudden fall" caused by free swinging. In order to flexibly offset the impact load, when the auxiliary wheel 5 is lifted by the protrusion, the arc-shaped rod 71 slides into the arc-shaped sleeve 72 and compresses the first spring 8. The first spring 8 absorbs the impact energy through elastic deformation. At the same time, the high-frequency reciprocating action of the first spring 8 can keep the auxiliary wheel 5 in contact with the ground, improving the responsiveness of the caster.

[0024] Reference Figure 3 , Figure 4 As shown, furthermore, in order to reduce vertical impact and vibration during travel by reducing vertical bumps, the vertical shock absorption mechanism 4 includes a main body base 41 and a main body column 42 slidably connected inside the main body base 41. The main body column 42 is connected to the main connecting plate 1. When the mobile device encounters bumps on uneven roads, the vertical impact force transmitted by the main wheel 3 and the auxiliary wheel 5 drives the main body column 42 to slide linearly within the main body base 41 and continuously compresses the second spring 10 located between the main body column 42 and the main body base 41. Under the elastic action of the second spring 10, the vertical impact and vibration are attenuated.

[0025] Reference Figure 3 , Figure 4As shown, further, to further improve the smoothness of movement, dampers 9 are provided between the arc-shaped rod 71 and the arc-shaped sleeve 72, and between the main column 42 and the main seat 41. The damper 9 can be a friction damper, which dissipates vibration energy through friction. When the auxiliary wheel 5 contacts the uneven road surface, it will swing rapidly around the hinge shaft 6. The friction damper, through the friction between its internal friction plate and the contact surface of the arc-shaped rod 71 and the arc-shaped sleeve 72, hinders the swing speed and avoids the auxiliary wheel 5 from swaying too much due to inertia, such as jumping or violent bumping. After passing the obstacle, the auxiliary wheel 5 returns to its original position under the elastic action of the first spring 8. The friction of the friction damper will suppress the rebound speed during the return, preventing the auxiliary wheel 5 from swinging in the opposite direction due to the excessive elastic force of the first spring 8, and ensuring the caster is fast and stable. For the main wheel 3, during the sliding process of the main column 42, the damper 9 suppresses lateral swing or eccentric movement through the uniformly distributed damping force, ensuring that the main column 42 slides linearly in the vertical direction and avoiding structural wear or jamming caused by offset.

[0026] Reference Figures 1-3 As shown, furthermore, in order to facilitate the change of running direction of the mobile device, the rotating connection mechanism 2 includes a connecting column 21 connected to the main connecting plate 1 and a bearing 22 provided on the connecting column 21. The bearing 22 can be a ball bearing, a sliding bearing, etc., which can reduce the friction between the connecting column 21 and the main connecting plate 1, making the steering operation easier. When in use, the bearing 22 allows the connecting column 21 to rotate freely around the axis relative to the main connecting plate 1, so that the mobile device can easily change the direction of travel, making it flexible and convenient to use.

[0027] Reference Figure 3 As shown, furthermore, in order to provide overload protection, the grounding height of the auxiliary wheel 5 is higher than that of the main wheel 3. The auxiliary wheel 5 only touches the ground when the main wheel 3 is subjected to abnormal loads such as bumps or overload impacts. During normal driving, it remains suspended to avoid the additional rolling resistance, wear or increased energy consumption caused by the auxiliary wheel 5 being grounded for a long time. At the same time, when the main wheel 3 causes the vehicle body to sink abnormally due to a malfunction, the auxiliary wheel 5 touches the ground to form a rigid support to prevent the mobile equipment from overturning or losing control.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A type of anti-slip caster that adapts to uneven surfaces, characterized in that, include; The upper end of the main connecting plate (1) is connected to the main body of the equipment through a rotating connecting mechanism (2); The main wheel (3) is located below the main connecting plate (1) and is connected to the main connecting plate (1) through a vertical shock absorption mechanism (4); At least two auxiliary wheels (5) are symmetrically arranged on both sides of the main wheel (3) and are hinged to the bottom of the vertical damping mechanism (4) through the hinge shaft (6). A swing damping mechanism (7) is provided between the auxiliary wheel (5) and the vertical damping mechanism (4). When the auxiliary wheel (5) contacts the uneven road surface, it can swing around the hinge shaft (6) as the center, driving the auxiliary wheel (5) to move up and down to adapt to the road surface undulation.

2. The self-adaptive anti-skid caster for uneven ground according to claim 1, wherein, The swing damping mechanism (7) includes an arc-shaped rod (71) on the auxiliary wheel (5) and an arc-shaped sleeve (72) on the vertical damping mechanism (4). The arc-shaped rod (71) is slidably connected to the inside of the arc-shaped sleeve (72). A first spring (8) is connected between the arc-shaped rod (71) and the arc-shaped sleeve (72). The vertical damping mechanism (4) includes a main body seat (41) and a main body column (42) slidably connected to the inside of the main body seat (41). The main body column (42) is connected to the main connecting plate (1). A second spring (10) is connected between the main body column (42) and the main body seat (41).

3. The self-adjusting anti-slip caster for uneven surfaces as claimed in claim 2 wherein, Dampers (9) are provided between the arc-shaped rod (71) and the arc-shaped sleeve (72) and between the main column (42) and the main seat (41).

4. The self-adjusting anti-slip caster for uneven surfaces as claimed in claim 1 wherein, The rotating connection mechanism (2) includes a connecting column (21) connected to the main connecting plate (1) and a bearing (22) provided on the connecting column (21).

5. The self-adjusting anti-slip caster for uneven surfaces as claimed in claim 1 wherein, The grounding height of the auxiliary wheel (5) is higher than that of the main wheel (3).

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