Double-layer sliding side-locked universal wheel

Abstract

The utility model discloses a double-layer sliding side locking universal wheel which is characterized in that a top sealing cover is arranged at the lower part of a top connecting plate, a bottom sealing cover is arranged at the lower part of the top sealing cover, an upper ball is arranged between the top sealing cover and the top connecting plate, and a lower ball is arranged between the top sealing cover and the bottom sealing cover; the locking bolt penetrates through the top sealing cover, the bottom sealing cover and the top connecting plate to achieve locking and fixing of the top sealing cover, the bottom sealing cover and the top connecting plate, and by means of the structure, the rotating efficiency can be effectively improved, and meanwhile rapid maintenance in the follow-up using process can be achieved. A fixing plate and soft moving wheels are arranged on the top sealing cover, a locking frame is fixed to the outer side of the fixing plate, and inserting parts are arranged on the locking frame and face the soft moving wheels; the matched locking frame is provided with a trigger end and a trigger extrusion part, and in a natural state, the trigger end is separated from the locking stress baffle to reach a non-locking state; and in a force application state, the trigger end presses down and locks the stress baffle plate, so that the insertion part and the soft moving wheel are extruded and locked.

Description

Technical Field

[0001] This utility model belongs to the technical field of mobile vehicle accessories, specifically relating to a double-layer sliding side-locking omnidirectional wheel. Background Technology

[0002] In the field of material trolley technology, existing soft-body casters used in this field are mostly ordinary 360-degree rotating casters. These casters achieve support and rotation of the entire wheel body by setting up bearing assemblies. When locking, they achieve friction by pressing down the pressure plate to directly rub against the wheel body through a downward locking structure. The current technical problems are: 1. When using bearing assemblies, if the bearing assembly fails, it must be disassembled with special tools, resulting in high maintenance costs and inconvenience; 2. When using the downward pressing method to achieve wheel body friction, because the wheel body and the pressure plate are squeezed together, when the tangential force is greater than the frictional force, the locking state is prone to failure, affecting the stability of the locking.

[0003] In view of the shortcomings of the existing technology, the technical problem that urgently needs to be solved by those skilled in the art is: to design a swivel wheel with a lockable structure that can achieve the rotation of the wheel in place with a relatively simple structure and is easier to maintain; its friction locking structure can achieve embedded compression, which can prevent the locking state from loosening and avoid the locking state from easily failing. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this utility model provides a double-layer sliding side-locking omnidirectional wheel. By setting a double-layer ball bearing structure, it can ensure rotation in place and is easy to disassemble. It adopts an embedded locking structure to lock and fix the wheel body, and sets an anti-loosening structure to prevent the locking state from failing.

[0005] To achieve the above technical objectives, this utility model adopts the following solution: a double-layer sliding side-locking universal wheel, comprising a top connecting plate with a central fixing hole, a top sealing cover at the bottom of the top connecting plate, a bottom sealing cover at the bottom of the top sealing cover, an upper ball bearing between the top sealing cover and the top connecting plate, and a lower ball bearing between the top sealing cover and the bottom sealing cover. At least one locking bolt passes through the top sealing cover, the bottom sealing cover, and the top connecting plate to lock and fix them together. A fixing plate is provided on the top sealing cover, and a flexible moving wheel is provided on the fixing plate. A locking frame is coaxially fixed to the outside of the fixing plate and the flexible moving wheel. The locking frame is L-shaped, with a top beam at the top and an insertion part on the bottom surface of the top beam facing the flexible moving wheel. A locking force baffle and a long fixing groove are provided on the side wall of the locking frame. A foot pedal is provided in conjunction with the locking frame, and a trigger end and a trigger pressing part are provided on the foot pedal. The rear end of the trigger pressing part is heavier than the front end.

[0006] A compression guide assembly is provided between the side wall of the locking frame and the fixing plate, the compression guide assembly including a guide protrusion and a guide groove.

[0007] The long fixing groove provided on the side wall of the locking frame is used for coaxial fixation with the soft moving wheel, and the locking frame can move and adjust within the long fixing groove.

[0008] The top sealing cover has an upper ball bearing fixing groove inside, which is used to constrain and fix the upper ball bearing.

[0009] The bottom sealing cover is provided with a lower ball bearing fixing groove on its upper part, which is used to constrain and fix the lower ball bearing.

[0010] The area between the top sealing cover and the top connecting plate is the upper lubrication area, and the area between the top sealing cover and the bottom sealing cover is the lower lubrication area. The upper and lower lubrication areas are interconnected, and an oil injection port is provided on either the upper or lower lubrication area to allow for the injection of lubricating oil.

[0011] The beneficial effects of this utility model are as follows: Through the above structural design, the top connecting plate of this utility model has a central fixing hole; a top sealing cover is located at the lower part of the top connecting plate; a bottom sealing cover is located at the lower part of the top sealing cover; an upper ball bearing is located between the top sealing cover and the top connecting plate; a lower ball bearing is located between the top sealing cover and the bottom sealing cover; and a locking bolt passes through the top sealing cover, the bottom sealing cover, and the top connecting plate to achieve locking and fixing of the three. This structure allows for double-layer ball bearing sliding, effectively improving rotational efficiency while also enabling rapid maintenance during subsequent use; the top sealing cover is equipped with… The system includes a fixed plate and flexible casters. A locking frame, L-shaped in design, is fixed to the outer side of the fixed plate. A top beam is positioned on the top of the locking frame, and a connector is located on the bottom surface of the top beam facing the flexible casters. Limiting protrusions and elongated fixing grooves are provided on the side walls of the locking frame. A foot pedal is attached to the locking frame, featuring a trigger end and a trigger compression part. The rear end of the trigger compression part is heavier than its front end. In its natural state, under external force and its own weight, the trigger end disengages from the locking baffle, achieving a non-locked state. Under applied force, the trigger end presses down on the locking baffle, locking the connector and the flexible casters together. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0013] Figure 2 This is a schematic diagram of the locking structure of this utility model from the main view.

[0014] Figure 3This is a schematic diagram of the non-locking structure of this utility model from the front view;

[0015] Figure 4 Schematic diagram of the internal cross-sectional structure of this utility model;

[0016] Figure 5 for Figure 4 Enlarged schematic diagram of the structure of region A in the middle;

[0017] In the attached diagram, 1. Top connecting plate, 11. Upper countersunk hole, 12. Bottom sealing surface, 13. Upper ball bearing, 14. Lower ball bearing, 2. Fixing plate, 21. Guide groove, 3. Soft moving wheel, 4. Locking frame, 40. Top beam, 41. Guide protrusion, 42. Limiting protrusion, 43. Locking force baffle, 44. Long strip fixing groove, 5. Footrest, 51. Footrest center fixing part, 52. Front triggering compression part, 53. Rear triggering compression part, 54. Top limiting arc surface, 55. Trigger end, 56. Limiting plane, 6. Insertion part, 7. Bolt, 8. Top sealing cover, 81. Upper ball bearing fixing groove, 82. Upper lubrication area, 9. Bottom sealing cover, 91. Lower ball bearing fixing groove, 92. Lower lubrication area. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0019] As shown in the attached figure, a double-layer sliding side-locking universal wheel includes a top connecting plate 1, on which a central fixing hole is provided. The central fixing hole is a countersunk hole 11.

[0020] The bottom surface of the top connecting plate 1 is the bottom sealing surface 12, which is matched with the top surface of the top sealing cover 8. The upper surface of the top sealing cover 8 is provided with an upper ball fixing groove 81. An upper lubrication area 82 is formed between the top sealing cover 8 and the bottom sealing surface 12. Several upper balls 13 are provided in the upper ball fixing groove 81.

[0021] A bottom sealing cover 9 is provided below the top sealing cover 8. The top surface of the bottom sealing cover 9, facing the top sealing cover 8, has a lower ball bearing fixing groove 91 and a lower lubrication area 92. The lower ball bearing fixing groove 91 contains several lower balls 14. For lubrication, both the lower lubrication area 92 and the upper lubrication area 82 are filled with solid grease. The lower lubrication area 92 and the upper lubrication area 82 are interconnected. An oil injection hole can be provided on either the top sealing cover 8 or the bottom sealing cover 9 to pour grease into the lower lubrication area 92 and the upper lubrication area 82 for ball bearing lubrication.

[0022] When the top sealing cover 8 and the bottom sealing cover 9 are fixed, as shown in the attached... Figure 5 As shown, a locking bolt passes through the top sealing cover 8, the bottom sealing cover 9, and the top connecting plate 1 to lock and fix the three together. The central fixing hole on the top connecting plate 1 is set with a countersunk hole 11, which can sink the locking bolt for assembly and fixation, so as to avoid the locking bolt protruding from the top connecting plate 1 and affecting the assembly.

[0023] This utility model features a fixing plate 2 on the top sealing cover 8, with a flexible moving wheel 3 mounted on the fixing plate 2. A locking frame 4, L-shaped and coaxially fixed to the outer side of the fixing plate 2 and the flexible moving wheel 3, is also present. A top beam 40 is located at the top of the locking frame 4, and a insertion part 6 is located on the bottom surface of the top beam 40 facing the flexible moving wheel 3. A locking force-bearing baffle 43 is located at the bottom end of the side wall of the locking frame 4, and a long fixing groove 44 is located in the middle of the side wall of the locking frame 4 for coaxial fixing with the flexible moving wheel 3. Furthermore, the locking frame 4 can be moved and adjusted within the elongated fixing groove 44; a foot pedal 5 is provided in conjunction with the locking frame 4, and the foot pedal 5 is provided with a trigger end 55, a front trigger pressing part 52, and a rear trigger pressing part 53. The weight of the rear trigger pressing part 53 is greater than the weight of the front trigger pressing part 52. Under non-external force conditions, the rear trigger pressing part 53 is lower than the height of the front trigger pressing part 52 under the action of gravity. The limiting protrusion 42 on the side wall of the locking frame 4 is pressed against the top limiting arc surface 54 on the foot pedal 5. At this time, the state is as follows. Figure 3 As shown, this state is the non-locked state.

[0024] In a further design, the locking frame 4 has a guide protrusion 41 on its side wall and a guide groove 21 on its fixing plate. When the two work together, they can constrain the locking frame 4 to move in the radial direction of the moving wheel.

[0025] When this utility model is used, as shown in the attached drawings, in Figure 3 In this state, the weight of the rear triggering compression part 53 is greater than the weight of the front triggering compression part 52. In the non-externally applied state, the rear triggering compression part 53 is lower than the height of the front triggering compression part 52 under the action of gravity. At this time, the limiting plane 56 at the bottom of the footrest 5 is in contact with the locking force baffle 43. At this time, the limiting protrusion 42 on the side wall of the locking frame 4 is pressed against the top limiting arc surface 54 on the footrest 5. Under the dual action of the top limiting arc surface 54 and the locking force baffle 43, there is a certain gap between the constraint top beam 40 and the soft moving wheel 3. The plug part 6 located within this gap is disengaged from the soft moving wheel 3. At this time, it is in a non-locked state.

[0026] As shown in the attached diagram, Figure 2In this state, the front trigger pressing part 52 is subjected to external force, and the rear trigger pressing part 53 is higher than the front trigger pressing part 52 under the action of external force. At this time, the limiting plane 56 at the bottom of the footrest 5 disengages from the locking force baffle 43, and the trigger end 55 presses against the locking force baffle 43. The entire locking frame 4 moves downward along the constraint direction of the guide protrusion 41 and the guide groove 21, so that the top beam 40 and the soft moving wheel 3 are pressed together to form a small gap. The insertion part 6 located in this gap is inserted into the soft moving wheel 3, and at this time it is in a locked state. When an external person applies force to the rear trigger pressing part 53, the locked state is released.

[0027] This utility model achieves stationary rotation through a multi-layer ball bearing sealing structure and allows for internal maintenance by disassembling the bolts, making maintenance convenient and cost-effective. Furthermore, it achieves a locking state by inserting the soft moving wheel 3 into the plug part 6, ensuring stable locking without slippage. It is an ideal double-layer sliding side-locking universal wheel.

Claims

1. A double-layer sliding side-locking omnidirectional wheel, characterized in that: It includes a top connecting plate with a central fixing hole, a top sealing cover at the bottom of the top connecting plate, a bottom sealing cover at the bottom of the top sealing cover, an upper ball bearing between the top sealing cover and the top connecting plate, and a lower ball bearing between the top sealing cover and the bottom sealing cover. At least one locking bolt passes through the top sealing cover, the bottom sealing cover, and the top connecting plate to lock and fix them together. A fixing plate is provided on the top sealing cover, and a flexible moving wheel is provided on the fixing plate. A locking frame is coaxially fixed to the outside of the fixing plate and the flexible moving wheel. The locking frame is L-shaped, with a top beam at the top and a plug-in part on the bottom surface of the top beam facing the flexible moving wheel. A locking force baffle and a long fixing groove are provided on the side wall of the locking frame. A foot pedal is provided in conjunction with the locking frame, and a trigger end and a trigger pressing part are provided on the foot pedal. The rear end of the trigger pressing part is heavier than the front end.

2. The double-layer sliding side-locking caster wheel as described in claim 1, characterized in that: A compression guide assembly is provided between the side wall of the locking frame and the fixing plate, the compression guide assembly including a guide protrusion and a guide groove.

3. A double-layer sliding side-locking caster wheel as described in claim 1, characterized in that: The long fixing groove provided on the side wall of the locking frame is used for coaxial fixation with the soft moving wheel, and the locking frame can move and adjust within the long fixing groove.

4. A double-layer sliding side-locking caster wheel as described in claim 1, characterized in that: The top sealing cover has an upper ball bearing retaining groove inside.

5. A double-layer sliding side-locking caster wheel as described in claim 1, characterized in that: The bottom sealing cover is provided with a lower ball bearing fixing groove on its upper part.

6. A double-layer sliding side-locking caster wheel as described in claim 1, characterized in that: The area between the top sealing cover and the top connecting plate is the upper lubrication area, and the area between the top sealing cover and the bottom sealing cover is the lower lubrication area. The upper and lower lubrication areas are interconnected, and an oil injection port is provided on either the upper or lower lubrication area.

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