Automatic aligning trundle convenient to assemble

Abstract

The utility model discloses a self-aligning trundle convenient to assemble, which comprises a vertical shaft, a trundle frame and a trundle, a bearing seat is arranged at the top of the trundle frame, supporting plates are respectively arranged on the left side and the right side of the trundle frame, two ends of a rotating shaft of the trundle are respectively installed with the two supporting plates, and the lower end of the vertical shaft is installed in the bearing seat through a bearing. A small rolling wheel, a mounting disc and a spring are arranged above the wheel between the two supporting plates, the mounting disc is fixedly connected with the bottom of the vertical shaft, the small rolling wheel is mounted on the mounting disc and is eccentric with the vertical shaft, the two ends of the spring are connected with the two supporting plates respectively, and the spring is stretched to be pressed on the wheel surface of the small rolling wheel. According to the self-aligning trundle, the aligning structure is simple, the trundle can have the aligning function only through one spring and one small idler wheel, the trundle is easy to assemble, and therefore the production efficiency of the trundle can be greatly improved, and the production cost of the trundle can be greatly reduced.

Description

Technical Field

[0001] The utility model relates to the field of walking wheels, in particular to an automatic self-centering caster which is easy to assemble. Background Art

[0002] In order to facilitate the movement of equipment, casters are often installed at the bottom of the equipment, such as in trolleys, mobile tripods, workshop push trucks and other equipment. A large part of casters are universal wheels, which can change the direction of travel at will when subjected to force during travel. The caster needs to be corrected after changing direction, otherwise the caster is easy to spin in place. In the past, when the caster was subjected to force and changed direction, the user's body twisted to correct the direction of the caster. In order to reduce the user's physical fatigue, a variety of casters with automatic return function are now publicly designed. The existing automatic return casters generally have a complex return structure, which reduces the assembly speed of the caster and increases the production cost of the caster. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an automatic self-centering caster which has a simple self-centering structure and is convenient to assemble.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is: an automatic self-centering caster that is easy to assemble, including: a vertical axis, a wheel frame, and a wheel. A bearing seat is arranged on the top of the wheel frame, and a support plate is arranged on the left and right sides of the wheel frame respectively. The two ends of the wheel shaft are respectively installed with the two support plates, so that the wheel can be rotatably installed between the two support plates. The lower end of the vertical axis is installed in the bearing seat through a bearing, so that the wheel and the wheel frame can rotate around the vertical axis. It is characterized in that: a small roller, a mounting plate, and a spring are arranged above the wheel between the two support plates. The mounting plate is connected and fixed to the bottom of the vertical axis. The small roller is mounted on the mounting plate and is eccentric to the vertical axis. Both ends of the spring are respectively connected to the two support plates, and the spring is stretched and pressed on the wheel surface of the small roller. When the wheel is in the forward position, the spring is in the minimum stretching state. When the wheel is driven to turn, the wheel frame will rotate around the vertical axis with the spring. Since the small roller is eccentric to the vertical axis, the spring will increase its stretching under the action of the small roller. When the external force disappears, under the action of the spring, the wheel will return to the center under the drive of the wheel frame until the spring returns to the minimum stretching state.

[0005] Furthermore, the aforementioned easy-to-assemble self-centering caster, wherein: when the wheel is in the forward position, the small roller and the vertical axis are aligned front to back, and the two ends of the spring are aligned left to right.

[0006] Furthermore, the aforementioned automatic return caster is easy to assemble, wherein: the connection structure between the spring end and the support plate is: an opening is provided on the wall of the support plate, a hook-shaped plate is provided in the opening, and the end of the spring is bent into a hook so that the spring end can be hooked on the hook-shaped plate through the hook and connected to the support plate.

[0007] Furthermore, the aforementioned easy-to-assemble automatic return caster comprises: a plurality of locking grooves are arranged on the lower surface of the mounting plate, each locking groove is arranged at intervals along the circumference of the mounting plate, a pedal lock block that can rotate forward and backward is arranged at the rear of the top of the wheel frame, a linkage frame is arranged between the pedal lock block and the mounting plate, the linkage frame can be installed on the top of the wheel frame to rotate forward and backward, an elastic sheet with a fixed rear end and a front end tilted forward is arranged on the linkage frame, a brake plate located below the pedal lock block is arranged on the rear part of the linkage frame, and a brake plate is arranged on the front part of the linkage frame The locking plate can be tilted upward so that the locking teeth thereon can be stuck in the locking groove, so that the wheel frame can be locked and cannot rotate around the vertical axis.

[0008] The advantages of the utility model are: the self-centering structure of the automatic self-centering caster is relatively simple, and only one spring and a small roller are used to enable the caster to have the self-centering function, making the assembly of the caster relatively simple, thereby greatly improving the production efficiency of the caster and reducing the production cost of the caster. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 The present invention is a three-dimensional structural schematic diagram from one viewing angle of the automatic self-centering caster described in the present invention.

[0010] Figure 2 This is a three-dimensional structural schematic diagram of the automatic self-centering caster described in the utility model from another perspective.

[0011] Figure 3 This is a schematic structural diagram of the automatic self-centering caster of the utility model after the wheel frame is removed.

[0012] Figure 4 The utility model is a schematic cross-sectional structure diagram of the automatic self-centering caster.

[0013] Figure 5 It is a schematic cross-sectional structural diagram of the mounting plate described in the utility model.

[0014] Figure 6 It is a schematic cross-sectional structural diagram of the linkage frame described in the utility model. DETAILED DESCRIPTION

[0015] The present invention will be described in further detail below in conjunction with specific embodiments and accompanying drawings.

[0016] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, a self-aligning caster that is easy to assemble comprises: a vertical axis 1, a wheel frame 2, and a wheel 3. A threaded hole is usually provided at the top of the vertical axis 1, and the caster can be installed on the supporting foot of the equipment through the threaded hole; a bearing seat 4 is provided at the top of the wheel frame 2, and a support plate 5 is provided on the left and right sides of the wheel frame 2, and the two ends of the rotating shaft of the wheel 3 are respectively installed with the two support plates 5, so that the wheel 3 can be rotatably installed between the two support plates 5, and the lower end of the vertical axis 1 is installed in the bearing seat 4 through a bearing, so that the wheel 3 and the wheel frame 2 can rotate around the vertical axis 1, and a small roller 6, a mounting plate 7, a A spring 8 and a mounting plate 7 are connected and fixed to the bottom of the vertical axis 1. A small roller 6 is mounted on the mounting plate 7 and is eccentric to the vertical axis 1. Both ends of the spring 8 are respectively connected to two support plates 5, and the spring 8 is stretched and pressed on the wheel surface of the small roller 6. When the wheel 3 is in the forward position, the spring 8 is in the minimum stretching state. When the wheel 3 is driven and turned, the wheel frame 2 will rotate around the vertical axis 1 with the spring 8. Since the small roller 6 and the vertical axis 1 are eccentric, the spring 8 will increase its stretching under the action of the small roller 6. When the external force disappears, under the action of the spring 8, the wheel 3 will return to the center under the drive of the wheel frame 2 until the spring 8 returns to the minimum stretching state.

[0017] In actual production design, when the wheel 3 is in the forward position, the small roller 6 and the vertical axis 1 are aligned front to back, and the two ends of the spring 8 are aligned left to right.

[0018] The self-centering structure of the above-mentioned automatic self-centering caster is relatively simple. Only a spring 8 and a small roller 6 are used to make the caster have a self-centering function, making the assembly of the caster relatively simple, thereby greatly improving the production efficiency of the caster and reducing the production cost of the caster.

[0019] In this embodiment, the connection structure between the end of the spring 8 and the support plate 5 is as follows: an opening 9 is provided on the wall of the support plate 5, a hook-shaped plate 10 is provided in the opening 9, and the end of the spring 8 is bent into a hook, so that the end of the spring 8 can be hooked on the hook-shaped plate 10 and connected to the support plate 5. This arrangement can facilitate the disassembly and assembly of the spring 8.

[0020] A plurality of locking grooves 11 are provided on the lower surface of the mounting plate 7, and each locking groove 11 is evenly spaced along the circumference of the mounting plate 7. A pedal lock block 12 that can rotate forward and backward is provided at the rear of the top of the wheel frame 2, and a linkage frame 13 is provided between the pedal lock block 12 and the mounting plate 7. The linkage frame 13 is installed on the top of the wheel frame 2 so as to rotate forward and backward. An elastic sheet 14 with a fixed rear end and a front end tilted forward is provided on the linkage frame 13. A brake plate 15 located below the pedal lock block 12 is provided on the rear part of the linkage frame 13. A lock plate 16 located below the mounting plate 7 is provided on the front part of the linkage frame 13. The front of the lock plate 16 Three locking teeth 17 that can be inserted into the locking groove 11 are provided on the end, the elastic sheet 14 is located above the locking plate 16, and the elastic sheet 14 abuts against the inner side of the top of the wheel frame 2, so that the linkage frame 13 can be pressed by the wheel frame 2, so that the brake plate 15 can be tilted upward and abut against the bottom of the pedal lock block 12. When the foot steps on the rear part of the pedal lock block 12, the bottom of the pedal lock block 12 can press the brake plate 15 downward. After the brake plate 15 swings downward, it can abut against the wheel surface of the wheel 3 to brake the wheel 3, and the locking plate 16 can be tilted upward so that the three locking teeth 17 thereon can be respectively inserted into a locking groove 11, so that the wheel frame 2 can be locked and cannot rotate around the vertical axis 1.

Claims

1. An easy-to-assemble self-centering caster, comprising: A vertical shaft, a wheel frame, and a wheel. A bearing seat is arranged on the top of the wheel frame. A support plate is arranged on the left and right sides of the wheel frame respectively. The two ends of the wheel shaft are respectively installed with the two support plates, so that the wheel can be rotatably installed between the two support plates. The lower end of the vertical shaft is installed in the bearing seat through a bearing, so that the wheel and the wheel frame can rotate around the vertical shaft. It is characterized in that: a small roller, a mounting plate, and a spring are arranged above the wheel between the two support plates. The mounting plate is connected and fixed to the bottom of the vertical shaft. The small roller is installed on The spring is mounted on a mounting plate and is eccentric to the vertical axis. Both ends of the spring are connected to two support plates respectively, and the spring is stretched and pressed on the wheel surface of the small roller. When the wheel is not turning and is in a forward position, the spring is in a state of minimum stretching. When the wheel is moving and is forced to turn, the wheel frame will rotate around the vertical axis with the spring. Since the small roller is eccentric to the vertical axis, the spring will increase in stretch under the action of the small roller. When the external force disappears, under the action of the spring, the wheel will return to the center under the drive of the wheel frame until the spring returns to a state of minimum stretching.

2. The easy-to-assemble self-centering caster according to claim 1, characterized in that: When the wheel is in the forward position, the small roller and the vertical axis are aligned front to back, and the two ends of the spring are aligned left to right.

3. The easy-to-assemble self-centering caster according to claim 1 or 2, characterized in that: The connection structure between the spring end and the support plate is as follows: an opening is provided on the wall of the support plate, a hook-shaped plate is provided in the opening, and the end of the spring is bent into a hook so that the spring end can be hooked on the hook-shaped plate through the hook and connected to the support plate.

4. The easy-to-assemble self-centering caster according to claim 1 or 2, characterized in that: A plurality of locking grooves are arranged on the lower surface of the mounting plate, and each locking groove is arranged at intervals along the circumference of the mounting plate. A pedal lock block that can rotate forward and backward is arranged at the rear of the top of the wheel frame. A linkage frame is arranged between the pedal lock block and the mounting plate. The linkage frame can be installed on the top of the wheel frame and can rotate forward and backward. An elastic sheet with a fixed rear end and a front end tilted forward is arranged on the linkage frame. A brake plate located below the pedal lock block is arranged on the rear of the linkage frame. A lock plate located below the mounting plate is arranged on the front of the linkage frame. The front end of the lock plate is provided with a locking tooth that can be inserted into the locking groove. The elastic sheet is located above the lock plate, and the elastic sheet abuts against the inner side of the top of the wheel frame, so that the linkage frame can be pressed by the wheel frame, so that the brake plate can be tilted upward and abut against the bottom of the pedal lock block. When the foot steps on the rear part of the pedal lock block, the bottom of the pedal lock block can press the brake plate downward. After the brake plate swings downward, it can abut against the wheel surface to brake the wheel, and the lock plate can be tilted upward so that the locking teeth thereon can be inserted into the locking groove, so that the wheel frame can be locked and cannot rotate around the vertical axis.

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