Obstacle crossing universal wheel

Abstract

The utility model provides an obstacle crossing universal wheel which comprises a universal wheel connecting plate, a universal wheel rotating frame, a universal wheel support, a front wheel and a rear wheel, the universal wheel connecting plate is rotationally connected with the universal wheel rotating frame through a vertically-arranged connecting assembly, and the universal wheel support is rotationally connected with the universal wheel rotating frame through a transversely-arranged rotating pin shaft; the front wheel and the rear wheel are installed at the front end and the rear end of the universal wheel support respectively, and in a normal state, the front wheel is in a suspended state, and the rear wheel is in a ground contact state. An elastic compression reset mechanism is arranged between the universal wheel support and the universal wheel rotating frame and located above the rear wheel. Limiting columns are arranged on the universal wheel supports above the front wheels, and in the normal state, the upper ends of the limiting columns abut against the lower surface of the top plate of the universal wheel rotating frame. According to the obstacle crossing universal wheel, when the rear wheels cross obstacles, the front wheels and the rear wheels can rotate around the rotating pin shafts, the front wheels touch the ground and the rear wheels are lifted, and therefore the obstacle crossing action of the universal wheel is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of universal wheels, in particular to an obstacle-crossing universal wheel. Background Art

[0002] At present, the universal wheels commonly found on the market consist of a rubber-coated wheel and a universal seat thereon. This type of universal wheel can rotate 360 ​​degrees horizontally, but it does not have an obstacle crossing function. When the universal wheel passes over a bump or a pit, some wheels in the wheel system may have a small contact area with the ground and cannot smoothly cross the path. The universal wheel needs to be manually lifted, which is inconvenient to use and has low practicality. Utility Model Content

[0003] The purpose of the utility model is to provide an obstacle-crossing universal wheel, which can solve the technical problem that traditional universal wheels do not have the obstacle-crossing function.

[0004] The utility model provides an obstacle-crossing universal wheel, comprising a universal wheel connecting plate, a universal wheel rotating frame, a universal wheel bracket, a front wheel and a rear wheel, the universal wheel connecting plate and the universal wheel rotating frame being rotatably connected by a vertically arranged connecting assembly, the universal wheel bracket and the universal wheel rotating frame being rotatably connected by a transversely arranged rotating pin; the front wheel and the rear wheel are respectively mounted on the front and rear ends of the universal wheel bracket. In a normal state, the front wheel is in a suspended state, and the rear wheel is in a ground-contacting state; an elastic compression reset mechanism is provided between the universal wheel bracket and the top plate of the universal wheel rotating frame, and the elastic compression reset mechanism is located above the rear wheel; a limiting column is provided on the universal wheel bracket above the front wheel. In a normal state, the upper end of the limiting column can conflict with the lower surface of the top plate of the universal wheel rotating frame; the rotating pin is located between the limiting column and the elastic compression reset mechanism.

[0005] According to an obstacle-crossing universal wheel provided by the utility model, the elastic compression reset mechanism includes a top column guide hole arranged on the universal wheel bracket, a compression spring arranged in the top column guide hole, and a top column arranged on the upper part of the compression spring, and the top column can pass through the upper port of the top column guide hole and conflict with the lower surface of the top plate of the universal wheel rotating frame.

[0006] According to an obstacle-crossing universal wheel provided by the utility model, the universal wheel connecting plate includes an upper connecting end plate, an annular side wall and a lower connecting bottom plate. The upper connecting end plate is fixedly arranged at the upper end extension of the annular side wall, and the lower connecting bottom plate is fixedly arranged at the bottom of the annular side wall, so that the upper connecting end plate, the annular side wall and the lower connecting bottom plate form a groove with an upper end opening.

[0007] According to an obstacle-crossing universal wheel provided by the utility model, the connection assembly includes a fastening connector and a bearing, the bearing is installed on the universal wheel connecting plate, and the top plate of the universal wheel rotating frame and the bearing are connected through the fastening connector, so that the universal wheel rotating frame and the universal wheel connecting plate can rotate relative to each other.

[0008] According to an obstacle-crossing universal wheel provided by the utility model, the front wheel is mounted on the universal wheel bracket through the front wheel axle, the front wheel includes a front wheel bearing and a front wheel body fixedly connected to the outer ring of the front wheel bearing, and the inner ring of the front wheel bearing is fixedly connected to the front wheel axle; the rear wheel is mounted on the universal wheel bracket through the rear wheel axle, the rear wheel includes a rear wheel bearing and a rear wheel body fixedly connected to the outer ring of the rear wheel bearing, and the inner ring of the rear wheel bearing is fixedly connected to the rear wheel axle.

[0009] The utility model also provides another obstacle-crossing universal wheel, comprising a universal wheel connecting plate, a universal wheel rotating frame, a universal wheel bracket, a front wheel and a rear wheel, the universal wheel connecting plate and the universal wheel rotating frame are rotatably connected by a vertically arranged connecting assembly, the universal wheel bracket and the universal wheel rotating frame are rotatably connected by a horizontally arranged rotating pin; the front wheel and the rear wheel are respectively installed at the front and rear ends of the universal wheel bracket. In a normal state, the front wheel is in a suspended state, and the rear wheel is in a ground-contacting state; an elastic compression reset mechanism is provided between the universal wheel bracket and the top plate of the universal wheel rotating frame, and the elastic compression reset mechanism is provided above the rear wheel; the rotating pin is provided above the front wheel, and a rotating positioning pin is rotatably installed on the universal wheel bracket between the rotating pin and the elastic compression reset mechanism, and an arc-shaped waist hole is provided on the universal wheel rotating frame, and the rotating positioning pin can slide with the arc-shaped waist hole.

[0010] According to an obstacle-crossing universal wheel provided by the utility model, the elastic compression reset mechanism includes a top column guide hole arranged on the universal wheel bracket, a compression spring arranged in the top column guide hole, and a top column arranged on the upper part of the compression spring, and the top column can pass through the upper port of the top column guide hole and conflict with the lower surface of the top plate of the universal wheel rotating frame.

[0011] According to an obstacle-crossing universal wheel provided by the utility model, the universal wheel connecting plate includes an upper connecting end plate, an annular side wall and a lower connecting bottom plate. The upper connecting end plate is fixedly arranged at the upper end extension of the annular side wall, and the lower connecting bottom plate is fixedly arranged at the bottom of the annular side wall, so that the upper connecting end plate, the annular side wall and the lower connecting bottom plate form a groove with an upper end opening.

[0012] According to an obstacle-crossing universal wheel provided by the utility model, the connection assembly includes a fastening connector and a bearing, the bearing is installed on the universal wheel connecting plate, and the top plate of the universal wheel rotating frame and the bearing are connected through the fastening connector, so that the universal wheel rotating frame and the universal wheel connecting plate can rotate relative to each other.

[0013] According to an obstacle-crossing universal wheel provided by the utility model, the front wheel is mounted on the universal wheel bracket through the front wheel axle, the front wheel includes a front wheel bearing and a front wheel body fixedly connected to the outer ring of the front wheel bearing, and the inner ring of the front wheel bearing is fixedly connected to the front wheel axle; the rear wheel is mounted on the universal wheel bracket through the rear wheel axle, the rear wheel includes a rear wheel bearing and a rear wheel body fixedly connected to the outer ring of the rear wheel bearing, and the inner ring of the rear wheel bearing is fixedly connected to the rear wheel axle.

[0014] The obstacle-crossing universal wheel provided by the utility model rotates and connects the universal wheel connecting plate and the universal wheel rotating frame through a vertically arranged connecting assembly, and the universal wheel connecting plate is used to be connected to the upper structure, and the obstacle-crossing universal wheel can rotate 360 ​​degrees horizontally relative to the upper structure through the rotating connection mode of the connecting assembly; wherein the universal wheel bracket and the universal wheel rotating frame are rotatably connected through a horizontally arranged rotating pin shaft, so that the front wheel and the rear wheel can swing back and forth through the universal wheel bracket when the obstacle-crossing universal wheel crosses obstacles; wherein the front wheel and the rear wheel are respectively mounted on the front and rear ends of the universal wheel bracket, and in a normal state, the front wheel is in a suspended state and the rear wheel is in a ground-contacting state, that is, in a normal state, the rear wheel, as the main wheel of the obstacle-crossing universal wheel, touches the ground and rolls; by connecting the universal wheel bracket and the universal wheel bracket An elastic compression reset mechanism is provided between the top plates of the wheel rotating frame, and the elastic compression reset mechanism is located above the rear wheel. Under the elastic force of the elastic compression reset mechanism, the rear wheel is kept on the ground and the front wheel is suspended in the air under normal conditions. A limit post is provided on the universal wheel bracket above the front wheel. Under normal conditions, the upper end of the limit post can contact the lower surface of the top plate of the universal wheel rotating frame, and a rotation pin is provided between the limit post and the elastic compression reset mechanism, thereby preventing the elastic compression reset mechanism from passing over the top, thereby ensuring the stability of the universal wheel. When the rear wheel encounters an obstacle, the rear wheel is subjected to force to compress the elastic compression reset mechanism, causing the rear wheel of the obstacle-crossing universal wheel to swing around the rotation pin and rise, while the front wheel moves downward and touches the ground, allowing it to continue to move forward to achieve the purpose of overcoming the obstacle. Therefore, the obstacle-crossing universal wheel provided by the utility model can rotate and swing around the rotation pin by the universal wheel bracket when overcoming obstacles, so that the front wheel touches the ground and the rear wheel rises, thereby achieving the obstacle-crossing action of the universal wheel, which is convenient to use and more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a structural diagram of the first embodiment of the obstacle-crossing universal wheel of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the first embodiment of the obstacle-crossing universal wheel of the present invention;

[0018] Figure 3 This is a structural diagram of the universal wheel bracket in the first embodiment of the obstacle-crossing universal wheel of the present invention;

[0019] Figure 4 This is a structural diagram of the universal wheel rotating frame in the first embodiment of the obstacle-crossing universal wheel of the present invention;

[0020] Figure 5 This is a structural diagram of the second embodiment of the obstacle-crossing universal wheel of the present invention;

[0021] Figure 6 This is a schematic diagram of the internal structure of the second embodiment of the obstacle-crossing universal wheel of the present invention;

[0022] Figure 7 This is a structural diagram of a universal wheel bracket in the second embodiment of the obstacle-crossing universal wheel of the present invention;

[0023] Figure 8 This is a schematic structural diagram of the universal wheel rotating frame in the second embodiment of the obstacle-crossing universal wheel of the present invention.

[0024] Description of reference numerals:

[0025] 1. Universal wheel connecting plate; 101. Upper connecting end plate; 102. Annular side wall; 103. Lower connecting bottom plate;

[0026] 2. Universal wheel rotating frame; 201. Top plate; 202. Side plate; 203. Arc waist hole; 204. First rotating pin hole; 205. Fastening bolt hole;

[0027] 3. Universal wheel bracket; 301. Second rotation pin hole; 302. Front wheel hole; 303. Rear wheel hole; 304. Rotation positioning pin hole;

[0028] 4. Front wheel; 401. Front wheel bearing; 402. Front wheel body; 403. Front wheel axle;

[0029] 5. Rear wheel; 501. Rear wheel bearing; 502. Rear wheel body; 503. Rear wheel axle;

[0030] 6. Connecting assembly; 601. Fastening bolt; 602. Fastening nut; 603. Bearing;

[0031] 7. Rotating pin; 8. Guide hole for ejector column; 9. Compression spring; 10. Ejector column; 11. Limiting column; 12. Rotating positioning pin; 13. Wheel cover. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0035] like Figures 1 to 4As shown, an embodiment of the utility model provides an obstacle-crossing universal wheel, including a universal wheel connecting plate 1, a universal wheel rotating frame 2, a universal wheel bracket 3, a front wheel 4 and a rear wheel 5. The universal wheel connecting plate 1 is arranged on the universal wheel rotating frame 2, and the universal wheel connecting plate 1 and the universal wheel rotating frame 2 are rotatably connected through a vertically arranged connecting component 6. The universal wheel connecting plate 1 is used to be connected to the upper structure, and the horizontal 360-degree rotation of the obstacle-crossing universal wheel relative to the upper structure can be achieved through the rotating connection method of the connecting component 6.

[0036] Among them, the universal wheel bracket 3 and the universal wheel rotating frame 2 are rotatably connected through a horizontally arranged rotating pin 7, so that when the obstacle-crossing universal wheel overcomes obstacles, the front wheel 4 and the rear wheel 5 can swing back and forth around the rotating pin 7 relative to the universal wheel rotating frame 2 through the universal wheel bracket 3.

[0037] The front wheel 4 and rear wheel 5 are mounted on the front and rear ends of the universal wheel bracket 3, respectively. In normal operation, the front wheel 4 is suspended in the air, while the rear wheel 5 is grounded. In other words, in normal operation, the rear wheel 5 acts as the main wheel of the universal wheel for overcoming obstacles and rolls on the ground.

[0038] An elastic compression reset mechanism is provided between the universal wheel bracket 3 and the top plate 201 of the universal wheel rotating frame 2, and is located above the rear wheel 5. In other words, under normal conditions, the elastic force of the elastic compression reset mechanism keeps the rear wheel 5 on the ground and the front wheel 4 suspended in the air.

[0039] Among them, a limit column 11 is also provided on the universal wheel bracket 3 above the front wheel 4, and the rotating pin shaft 7 is located between the limit column 11 and the elastic compression reset mechanism. Under normal conditions, the upper end of the limit column 11 can conflict with the lower surface of the top plate 201 of the universal wheel rotating frame 2, thereby preventing the elastic compression reset mechanism from going over the top and ensuring the stability of the universal wheel.

[0040] When the rear wheel 5 encounters an obstacle, the rear wheel 5 is subjected to force to compress the elastic compression reset mechanism, so that the rear wheel 5 swings and rises around the rotating pin 7 under the action of the universal wheel bracket 3, and at the same time the front wheel 4 moves downward and touches the ground, so that the universal wheel can continue to move forward to achieve the purpose of overcoming the obstacle.

[0041] Therefore, when overcoming obstacles, the obstacle-crossing universal wheel of the embodiment of the present invention can rotate and swing the front wheel 4 and the rear wheel 5 around the rotating pin 7 through the universal wheel bracket 3, so that the front wheel 4 touches the ground and the rear wheel 5 is lifted, thereby realizing the obstacle-crossing action of the universal wheel, which is easy to use and more practical.

[0042] Specifically, the elastic compression reset mechanism includes a top post guide hole 8 provided on the universal wheel bracket 3. A compression spring 9 is installed in the top post guide hole 8. A top post 10 is installed on the top of the compression spring 9. The top post 10 can pass through the upper end of the top post guide hole 8 and contact the lower surface of the top plate 201 of the universal wheel rotating frame 2. Under the elastic force of the compression spring 9, the top post 10 can be pressed against the bottom of the top plate 201 of the universal wheel rotating frame 2. When the rotational torque applied to the rear wheel 5 is less than the torque generated by the compression spring 9, the rear wheel 5 remains grounded and the front wheel 4 is suspended. When the rear wheel 5 encounters an obstacle, the compression spring 9 in the top post guide hole 8 is compressed by the rear wheel 5. The compression spring 9 contracts, causing the rear wheel 5 to rotate and rise around the rotation pin 7 under the action of the universal wheel bracket 3. At the same time, the front wheel 4 moves downward and touches the ground, allowing the universal wheel to continue to move forward to overcome the obstacle.

[0043] The top of the top column 10 is configured to be spherical, so that when the universal wheel rotating frame 2 is subjected to a rotational torque, the universal wheel rotating frame 2 can smoothly rotate and swing around the rotating pin 7 .

[0044] In addition, according to actual use requirements, the elastic compression reset mechanism can also adopt a structure with elastic compression reset function such as a shock absorber or a torsion spring.

[0045] Specifically, when the elastic compression reset mechanism adopts a structure consisting of a top column guide hole 8, a compression spring 9 and a top column 10, under normal conditions, the upper end surface of the limit column 11 is higher than the upper end surface of the top column guide hole 8, so that the upper end of the limit column 11 conflicts with the lower surface of the top plate 201 of the universal wheel rotating frame 2, thereby preventing the elastic compression reset mechanism from going over the top and ensuring the stability of the universal wheel.

[0046] The rotating pin 7 is arranged between the limiting column 11 and the elastic compression reset mechanism, which can ensure the reliability of the universal wheel bracket 3 when rotating and swinging relative to the universal wheel rotating frame 2.

[0047] Specifically, the universal wheel connecting plate 1 includes an upper connecting end plate 101, an annular side wall 102, and a lower connecting bottom plate 103. The upper connecting end plate 101 is fixedly mounted at the upper end extension of the annular side wall 102, and the lower connecting bottom plate 103 is fixedly mounted at the bottom of the annular side wall 102, so that the upper connecting end plate 101, the annular side wall 102, and the lower connecting bottom plate 103 enclose a groove with an upper end opening, which facilitates the rotational coordination and installation between the universal wheel connecting plate 1 and the universal wheel rotating frame 2 through the connecting assembly 6. In order to ensure the structural strength of the universal wheel connecting plate 1, the upper connecting end plate 101, the annular side wall 102, and the lower connecting bottom plate 103 are formed into an integral structure. Among them, a plurality of mounting holes are provided on the upper connecting end plate 101 for connection and installation with the upper structure.

[0048] Specifically, the connecting assembly 6 includes a fastening connector and a bearing 603. The bearing 603 can be installed in the groove of the universal wheel connecting plate 1, and the top plate 201 of the universal wheel rotating frame 2 and the bearing 603 are connected through the fastening connector so that the universal wheel rotating frame 2 and the universal wheel connecting plate 1 can rotate relative to each other.

[0049] According to actual use requirements, the fastening connector can be a bolt connector or a riveted connector, or a fastening connector of other structural forms, as long as a reliable connection between the universal wheel connecting plate 1 and the universal wheel rotating frame 2 can be achieved.

[0050] In this embodiment, the fastening connection includes a cooperating fastening bolt 601 and a fastening nut 602. The fastening bolt 601 passes through the top plate 201 of the universal wheel swivel frame 2, the lower connecting base plate 103 of the universal wheel connecting plate 1, and the bearing 603, and then is threadedly fastened to the fastening nut 602. In other words, the provision of the fastening bolt 601 and the fastening nut 602 ensures a secure connection between the universal wheel connecting plate 1 and the universal wheel swivel frame 2. The fastening bolt 601 is not threaded at the position corresponding to the bearing 603, but rather has threads at its upper end for mating with the fastening nut 602. When the fastening bolt 601 and the fastening nut 602 are securely connected, the fastening nut 602 presses against the bearing 603, while the nut of the fastening bolt 601 presses against the top plate 201 of the universal wheel swivel frame 2.

[0051] Specifically, the universal wheel rotating frame 2 includes a top plate 201 and two side plates 202. The two side plates 202 are respectively vertically connected to the two sides of the top plate 201, so that an inverted U-shaped installation groove is formed between the top plate 201 and the two side plates 202. The universal wheel rotating frame 2 is buckled and arranged on the upper outer side of the universal wheel bracket 3 through the installation groove.

[0052] The two side plates 202 are respectively provided with first rotation pin holes 204 for installing the rotation pin 7 , and the top plate 201 is provided with fastening bolt holes 205 for installing the fastening bolts 601 .

[0053] Specifically, the front wheel 4 includes a front wheel bearing 401 and a front wheel body 402 fixedly connected to the outer ring of the front wheel bearing 401. The inner ring of the front wheel bearing 401 is fixedly connected to the front wheel axle 403. The front wheel 4 is mounted on the universal wheel bracket 3 via the front wheel axle 403, thereby ensuring the normal rotation of the front wheel 4. The rear wheel 5 includes a rear wheel bearing 501 and a rear wheel body 502 fixedly connected to the outer ring of the rear wheel bearing 501. The inner ring of the rear wheel bearing 501 is fixedly connected to the rear wheel axle 503. The rear wheel 5 is mounted on the universal wheel bracket 3 via the rear wheel axle 503, thereby ensuring the normal rotation of the rear wheel 5.

[0054] The universal wheel bracket 3 is provided with a second rotation pin hole 301 for mounting the rotation pin 7 , and also with a front wheel hole 302 and a rear wheel hole 303 for mounting the front wheel 4 and the rear wheel 5 respectively.

[0055] In addition, a wheel cover 13 is installed on the outside of the universal wheel bracket 3 to shield and protect the internal structure thereof.

[0056] like Figures 5 to 8 As shown, an embodiment of the utility model provides another obstacle-crossing universal wheel, including a universal wheel connecting plate 1, a universal wheel rotating frame 2, a universal wheel bracket 3, a front wheel 4 and a rear wheel 5. The universal wheel connecting plate 1 is arranged on the universal wheel rotating frame 2, and the universal wheel connecting plate 1 and the universal wheel rotating frame 2 are rotatably connected through a vertically arranged connecting component 6. The universal wheel connecting plate 1 is used to be connected to the upper structure, and the horizontal 360-degree rotation of the obstacle-crossing universal wheel relative to the upper structure can be achieved through the rotating connection method of the connecting component 6.

[0057] The front wheel 4 and rear wheel 5 are mounted on the front and rear ends of the universal wheel bracket 3, respectively. In normal operation, the front wheel 4 is suspended in the air, while the rear wheel 5 is grounded. In other words, in normal operation, the rear wheel 5 acts as the main wheel of the universal wheel for overcoming obstacles and rolls on the ground.

[0058] Among them, the universal wheel bracket 3 and the universal wheel rotating frame 2 are rotatably connected through a horizontally arranged rotating pin 7, and the rotating pin 7 is located above the front wheel 4, so that when the obstacle-crossing universal wheel overcomes obstacles, the front wheel 4 and the rear wheel 5 can rotate and swing around the rotating pin 7 relative to the universal wheel rotating frame 2 through the universal wheel bracket 3.

[0059] An elastic compression reset mechanism is provided between the universal wheel bracket 3 and the top plate 201 of the universal wheel rotating frame 2, and is located above the rear wheel 5. In other words, under normal conditions, the elastic force of the elastic compression reset mechanism keeps the rear wheel 5 on the ground and the front wheel 4 suspended in the air.

[0060] A rotational positioning pin 12 is rotatably mounted on the universal wheel bracket 3 between the rotation pin 7 and the elastic compression reset mechanism. A curved waist hole 203 is provided on the universal wheel swivel frame 2, and the rotational positioning pin 12 is able to slidably engage with the curved waist hole 203. That is, when the universal wheel bracket 3 rotates and swings around the rotation pin 7 relative to the universal wheel swivel frame 2, the rotational positioning pin 12 can move along the curved waist hole 203, thereby limiting the rotation angle of the universal wheel bracket 3 and preventing the elastic compression reset mechanism from over-riding.

[0061] When the rear wheel 5 encounters an obstacle, the rear wheel 5 is subjected to force to compress the elastic compression reset mechanism, so that the rear wheel 5 swings and rises around the rotating pin 7 under the action of the universal wheel bracket 3, and at the same time the front wheel 4 moves downward and touches the ground, so that the universal wheel can continue to move forward to achieve the purpose of overcoming the obstacle.

[0062] Therefore, when overcoming obstacles, the obstacle-crossing universal wheel of the embodiment of the present invention can rotate and swing the front wheel 4 and the rear wheel 5 around the rotating pin 7 through the universal wheel bracket 3, so that the front wheel 4 touches the ground and the rear wheel 5 is lifted, thereby realizing the obstacle-crossing action of the universal wheel, which is easy to use and more practical.

[0063] Specifically, the elastic compression reset mechanism includes a top post guide hole 8 provided on the universal wheel bracket 3. A compression spring 9 is installed in the top post guide hole 8. A top post 10 is installed on the top of the compression spring 9. The top post 10 can pass through the upper end of the top post guide hole 8 and contact the lower surface of the top plate 201 of the universal wheel rotating frame 2. Under the elastic force of the compression spring 9, the top post 10 can be pressed against the bottom of the top plate 201 of the universal wheel rotating frame 2. When the rotational torque applied to the rear wheel 5 is less than the torque generated by the compression spring 9, the rear wheel 5 remains grounded and the front wheel 4 is suspended. When the rear wheel 5 encounters an obstacle, the compression spring 9 in the top post guide hole 8 is compressed by the rear wheel 5. The compression spring 9 contracts, causing the rear wheel 5 to rotate and rise around the rotation pin 7 under the action of the universal wheel bracket 3. At the same time, the front wheel 4 moves downward and touches the ground, allowing the universal wheel to continue to move forward to overcome the obstacle.

[0064] The top of the top column 10 is configured to be spherical, so that when the universal wheel rotating frame 2 is subjected to a rotational torque, the universal wheel rotating frame 2 can smoothly rotate and swing around the rotating pin 7 .

[0065] In addition, according to actual use requirements, the elastic compression reset mechanism can also adopt a structure with elastic compression reset function such as a shock absorber or a torsion spring.

[0066] Specifically, the universal wheel connecting plate 1 includes an upper connecting end plate, an annular side wall, and a lower connecting base plate. The upper connecting end plate is fixedly mounted at the upper extension of the annular side wall, and the lower connecting base plate is fixedly mounted at the bottom of the annular side wall. This allows the upper connecting end plate, the annular side wall, and the lower connecting base plate to enclose a groove with an upper opening, facilitating the rotational and mating installation between the universal wheel connecting plate 1 and the universal wheel rotating frame 2 via the connecting assembly 6. To ensure the structural strength of the universal wheel connecting plate 1, the upper connecting end plate, the annular side wall, and the lower connecting base plate are integrally formed. The upper connecting end plate is provided with multiple mounting holes for connection and installation with the upper structure.

[0067] Specifically, the connecting assembly 6 includes a fastening connector and a bearing 603. The bearing 603 can be installed in the groove of the universal wheel connecting plate 1, and the top plate 201 of the universal wheel rotating frame 2 and the bearing 603 are connected through the fastening connector so that the universal wheel rotating frame 2 and the universal wheel connecting plate 1 can rotate relative to each other.

[0068] Among them, according to actual use requirements, the fastening connector can be a bolt connector or a riveted connector, or a fastening connector of other structural forms, as long as a reliable connection between the universal wheel connecting plate 1 and the universal wheel rotating frame 2 can be achieved.

[0069] In this embodiment, the fastening connection includes a cooperating fastening bolt 601 and a fastening nut 602. The fastening bolt 601 passes through the top plate 201 of the universal wheel swivel frame 2, the lower connecting plate of the universal wheel connecting plate 1, and the bearing 603, and then is threadedly fastened to the fastening nut 602. In other words, the provision of the fastening bolt 601 and the fastening nut 602 ensures a secure connection between the universal wheel connecting plate 1 and the universal wheel swivel frame 2. The fastening bolt 601 is not threaded at the position corresponding to the bearing 603, but rather has threads at its upper end for mating with the fastening nut 602. When the fastening bolt 601 and the fastening nut 602 are securely connected, the fastening nut 602 presses against the bearing 603, while the nut of the fastening bolt 601 presses against the top plate 201 of the universal wheel swivel frame 2.

[0070] Specifically, the universal wheel rotating frame 2 includes a top plate 201 and two side plates 202. The two side plates 202 are respectively vertically connected to the two sides of the top plate 201, so that an inverted U-shaped installation groove is formed between the top plate 201 and the two side plates 202. The universal wheel rotating frame 2 is buckled and arranged on the upper outer side of the universal wheel bracket 3 through the installation groove.

[0071] The two side plates 202 are respectively provided with first rotation pin holes 204 for installing the rotation pin 7 , and the top plate 201 is provided with fastening bolt holes 205 for installing the fastening bolts 601 .

[0072] Specifically, the front wheel 4 includes a front wheel bearing and a front wheel body fixedly connected to the outer ring of the front wheel bearing. The inner ring of the front wheel bearing is fixedly connected to the front wheel axle. The front wheel 4 is mounted on the universal wheel bracket 3 via the front wheel axle, thereby ensuring the normal rotation of the front wheel 4. The rear wheel 5 includes a rear wheel bearing and a rear wheel body fixedly connected to the outer ring of the rear wheel bearing. The inner ring of the rear wheel bearing is fixedly connected to the rear wheel axle. The rear wheel 5 is mounted on the universal wheel bracket 3 via the rear wheel axle, thereby ensuring the normal rotation of the rear wheel 5.

[0073] Among them, a second rotating pin hole 301 for installing the rotating pin 7 is provided on the universal wheel bracket 3, a front wheel hole 302 and a rear wheel hole 303 for installing the front wheel 4 and the rear wheel 5 respectively are provided, and a rotating positioning pin hole 304 for installing the rotating positioning pin 12 is also provided.

[0074] In addition, a wheel cover 13 is installed on the outside of the universal wheel bracket 3 to shield and protect the internal structure thereof.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An obstacle-crossing universal wheel, characterized in that: The yoke is provided with a plurality of cams, each of which is connected to the front wheel and the rear wheel and is pivotally connected to the front wheel by a plurality of cams, each of which is connected to the cam by a plurality of cams. The rotating pin is located between the limiting column and the elastic compression reset mechanism.

2. The obstacle-crossing universal wheel according to claim 1, characterized in that: The elastic compression reset mechanism includes a top column guide hole arranged on the universal wheel bracket, a compression spring arranged in the top column guide hole, and a top column arranged on the upper part of the compression spring. The top column can pass through the upper end of the top column guide hole and conflict with the lower surface of the top plate of the universal wheel rotating frame.

3. The obstacle-crossing universal wheel according to claim 1, characterized in that: The universal wheel connecting plate includes an upper connecting end plate, an annular side wall and a lower connecting bottom plate. The upper connecting end plate is fixedly arranged at the upper end extension of the annular side wall, and the lower connecting bottom plate is fixedly arranged at the bottom of the annular side wall, so that the upper connecting end plate, the annular side wall and the lower connecting bottom plate form a groove with an upper end opening.

4. The obstacle-crossing universal wheel according to claim 1, characterized in that: The connecting assembly includes a fastening connector and a bearing, the bearing is installed on the universal wheel connecting plate, and the top plate of the universal wheel rotating frame and the bearing are connected through the fastening connector, so that the universal wheel rotating frame and the universal wheel connecting plate can rotate relative to each other.

5. The obstacle-crossing universal wheel according to claim 1, characterized in that: The front wheel is mounted on the universal wheel bracket via a front wheel axle, the front wheel includes a front wheel bearing and a front wheel body fixedly connected to the outer ring of the front wheel bearing, and the inner ring of the front wheel bearing is fixedly connected to the front wheel axle; the rear wheel is mounted on the universal wheel bracket via a rear wheel axle, the rear wheel includes a rear wheel bearing and a rear wheel body fixedly connected to the outer ring of the rear wheel bearing, and the inner ring of the rear wheel bearing is fixedly connected to the rear wheel axle.

6. An obstacle-crossing universal wheel, characterized in that: The camshaft is connected to the front wheel frame by a plurality of movable members, and the movable members are connected to the front wheel frame by a plurality of movable members.

7. The obstacle-crossing universal wheel according to claim 6, characterized in that: The elastic compression reset mechanism includes a top column guide hole arranged on the universal wheel bracket, a compression spring arranged in the top column guide hole, and a top column arranged on the upper part of the compression spring. The top column can pass through the upper end of the top column guide hole and conflict with the lower surface of the top plate of the universal wheel rotating frame.

8. The obstacle-crossing universal wheel according to claim 6, characterized in that: The universal wheel connecting plate includes an upper connecting end plate, an annular side wall and a lower connecting bottom plate. The upper connecting end plate is fixedly arranged at the upper end extension of the annular side wall, and the lower connecting bottom plate is fixedly arranged at the bottom of the annular side wall, so that the upper connecting end plate, the annular side wall and the lower connecting bottom plate form a groove with an upper end opening.

9. The obstacle-crossing universal wheel according to claim 6, characterized in that: The connecting assembly includes a fastening connector and a bearing, the bearing is installed on the universal wheel connecting plate, and the top plate of the universal wheel rotating frame and the bearing are connected through the fastening connector, so that the universal wheel rotating frame and the universal wheel connecting plate can rotate relative to each other.

10. The obstacle-crossing universal wheel according to claim 6, characterized in that: The front wheel is mounted on the universal wheel bracket via a front wheel axle, the front wheel includes a front wheel bearing and a front wheel body fixedly connected to the outer ring of the front wheel bearing, and the inner ring of the front wheel bearing is fixedly connected to the front wheel axle; the rear wheel is mounted on the universal wheel bracket via a rear wheel axle, the rear wheel includes a rear wheel bearing and a rear wheel body fixedly connected to the outer ring of the rear wheel bearing, and the inner ring of the rear wheel bearing is fixedly connected to the rear wheel axle.

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