High-load-bearing trundle
By employing a bearing structure in the swivel casters that connects the connecting cylinder to the inner ring of the bracket, the problem of ball wear is solved, achieving higher load-bearing capacity and stability.
Patent Information
- Application Number
- CN202520582520.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-03-28
AI Technical Summary
Existing swivel casters rely on a bearing structure consisting of a dial and ball bearings, which makes the ball bearings prone to wear and difficult to improve load-bearing capacity.
By using the existing bearing structure, the pressure on the outer ring of the first bearing is applied through the upper connecting seat, and the connecting cylinder is connected to the inner ring of the bracket, forming a bearing structure that does not rely on the top plate and balls, thereby enhancing the connection strength and improving the load-bearing capacity.
It improves the load-bearing capacity of the casters, reduces wear on the bearing structure, and increases service life and stability.
Smart Images
Figure CN223791249U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of caster technology, and in particular to a high load-bearing caster. Background Technology
[0002] Swivel casters are a special type of caster that can rotate 360 degrees horizontally around a vertical direction, facilitating vehicle steering. Existing swivel casters typically use a dial and top plate to hold ball bearings, forming a bearing structure. The ball bearings in these traditional swivel casters are prone to wear, making it difficult to further improve their load-bearing capacity. Utility Model Content
[0003] This utility model provides a high load-bearing caster that can improve load-bearing capacity.
[0004] To solve the above problems, the present invention adopts the following technical solution:
[0005] This utility model provides a high-load-bearing caster, including an upper connecting seat, a connecting cylinder, a first bearing, a bracket, and a wheel body. The wheel body is rotatably connected to the bracket. The upper connecting seat includes a top plate and a top seat connected to the bottom surface of the top plate. The bottom surface of the top seat is provided with a receiving groove. The first bearing is located in the receiving groove, and the axial direction of the first bearing is parallel to the vertical direction. The upper connecting seat is fixedly connected to the outer ring of the first bearing. The upper end of the connecting cylinder is fixedly connected to the inner ring of the first bearing, and the lower end of the connecting cylinder is connected to the bracket.
[0006] In some embodiments, the outer periphery of the connecting cylinder is provided with an outwardly protruding ring, which is located below the first bearing and abuts against the bracket.
[0007] In some embodiments, the top end of the connecting cylinder is provided with an outwardly extending flange, the flange being located above the first bearing, and the convex ring and the flange clamping and fixing the inner ring of the first bearing.
[0008] In some embodiments, the top plate is provided with a through hole communicating with the receiving groove, the top plate abuts against the outer ring of the first bearing, and the flange is located in the through hole.
[0009] In some embodiments, the bracket is provided with a socket, and the bottom end of the connecting cylinder is inserted into the socket, wherein the diameter of the socket is smaller than the outer diameter of the convex ring.
[0010] In some embodiments, the bottom opening of the receiving groove is provided with an inwardly tapering flange, which is located below the outer ring of the first bearing.
[0011] In some embodiments, two wheels are provided, and the two wheels are coaxially arranged.
[0012] In some embodiments, the bracket includes two arms, with the same screw passing through the two arms. A sleeve is fitted onto the screw, and the sleeve and two wheels are located between the two arms. A second bearing is provided on the inner side of the wheel, and the wheel is fitted onto the outer ring of the second bearing. The inner ring of the second bearing is fitted onto the sleeve.
[0013] In some embodiments, the sleeve is further fitted with a first limiting sleeve, a second limiting sleeve, and a third limiting sleeve, all of which are located between two support arms. The first limiting sleeve, the second bearing of one wheel, the second limiting sleeve, the second bearing of the other wheel, and the third limiting sleeve are sequentially arranged along the axial direction of the screw. The two ends of the first limiting sleeve and the two ends of the third limiting sleeve respectively abut against the inner rings of the adjacent support arm and the second bearing, and the two ends of the second limiting sleeve respectively abut against the inner rings of two adjacent second bearings.
[0014] This utility model has at least the following beneficial effects: This utility model uses existing bearings and does not rely on top plates, dials and balls to form a bearing structure. The pressure on the upper connecting seat is applied to the outer ring of the first bearing, while the inner ring of the first bearing is connected to the bracket through a connecting cylinder. This structure can improve the load-bearing capacity of the caster. Attached Figure Description
[0015] Figure 1 This is a structural schematic diagram of a high-load-bearing caster according to an embodiment of the present invention;
[0016] Figure 2 for Figure 1 The diagram shown is a partial exploded view of a high-load-bearing caster.
[0017] Figure 3 This is a side view of a high-load-bearing caster according to an embodiment of the present invention;
[0018] Figure 4 for Figure 3 A sectional view taken along section line AA;
[0019] Figure 5 This is a partially exploded view of another embodiment of the high-load-bearing caster of this utility model;
[0020] Figure 6 for Figure 3 A cross-sectional view taken along section line BB.
[0021] The attached figures are labeled as follows:
[0022] Upper connecting seat 100, top plate 110, through hole 111, top seat 120, fastening edge 121;
[0023] Connecting cylinder 200, convex ring 210, flange 220;
[0024] First bearing 300;
[0025] 400 bracket, 410 socket, 420 support arm;
[0026] Wheel body 500;
[0027] Screw 600, nut 610, sleeve 620, second bearing 630, first limiting sleeve 640, second limiting sleeve 650, third limiting sleeve 660. Detailed Implementation
[0028] This invention provides the following description with reference to the accompanying drawings to aid in a comprehensive understanding of the various embodiments of the invention as defined by the claims and their equivalents. The description includes various specific details to aid understanding, but these details should be considered exemplary only. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the invention.
[0029] In the description of this utility model, the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0030] It should be understood that when one element (e.g., the first element) is “connected” to another element (e.g., the second element), the element may be directly connected to the other element, or there may be an intervening element (e.g., the third element) between the element and the other element.
[0031] An embodiment of this utility model provides a high-load-bearing caster, such as... Figure 1-4 As shown, the vehicle includes an upper connecting seat 100, a connecting cylinder 200, a first bearing 300, a bracket 400, and a wheel 500. The wheel 500 is rotatably connected to the bracket 400, allowing it to rotate relative to the bracket 400 for easy movement of the vehicle. The upper connecting seat 100 includes a top plate 110 and a top seat 120 connected to the bottom surface of the top plate 110. The top plate 110 can be horizontally positioned to stably support the vehicle above. The bottom surface of the top seat 120 has a receiving groove in which the first bearing 300 is located, with its axial direction parallel to the vertical direction. The upper connecting seat 100 is fixedly connected to the outer ring of the first bearing 300. The connecting cylinder 200 can be vertically positioned, with its upper end fixedly connected to the inner ring of the first bearing 300 and its lower end connected to the bracket 400.
[0032] The bracket 400 can rotate relative to the upper connecting seat 100 in the vertical direction, thereby adjusting the direction of vehicle movement. This embodiment uses existing bearings and does not rely on top plates, dials and balls to form the bearing structure. The pressure on the upper connecting seat 100 is applied to the outer ring of the first bearing 300, while the inner ring of the first bearing 300 is connected to the bracket 400 through the connecting sleeve 200. The bearing with this structure is not easily worn and can improve the load-bearing capacity of the casters.
[0033] In some embodiments, the outer periphery of the connecting cylinder 200 is provided with an outwardly protruding ring 210, which is located below the first bearing 300 and abuts against the bracket 400. The weight of the vehicle is transmitted to the connecting cylinder 200 through the first bearing 300, and then pressed onto the bracket 400 by the connecting cylinder 200. The presence of the ring 210 is equivalent to increasing the thickness of the contact portion between the connecting cylinder 200 and the bracket 400, thereby enhancing the structural strength of the connecting cylinder 200 and further improving the load-bearing capacity of the caster.
[0034] Furthermore, the top end of the connecting cylinder 200 is provided with an outwardly extending flange 220, which is located above the first bearing 300. The convex ring 210 and the flange 220 clamp and fix the inner ring of the first bearing 300, thereby realizing the fixed connection between the connecting cylinder 200 and the inner ring of the first bearing 300. The flange 220 can be stamped on the top end of the connecting cylinder 200 by stamping.
[0035] Furthermore, the top plate 110 is provided with a through hole 111 communicating with the receiving groove. The top plate 110 abuts against the outer ring of the first bearing 300, and the flange 220 is located in the through hole 111. The through hole 111 can prevent the top plate 110 from abutting against the inner ring of the first bearing 300, ensuring that the inner ring of the first bearing 300 can rotate smoothly relative to its outer ring. At the same time, the through hole 111 can avoid the flange 220, preventing the flange 220 from abutting against the top plate 110 and causing the connecting cylinder 200 to rotate unevenly.
[0036] In some embodiments, the bracket 400 is provided with a socket 410, and the bottom end of the connecting cylinder 200 is inserted into the socket 410. The diameter of the socket 410 is smaller than the outer diameter of the convex ring 210. In this embodiment, the connecting cylinder 200 is positioned by the socket 410, which facilitates quick determination of the installation position of the connecting cylinder 200 and restricts the horizontal movement of the connecting cylinder 200 on the bracket 400. Because the diameter of the socket 410 is smaller than the outer diameter of the convex ring 210, the convex ring 210 will not be inserted into the socket 410, thus maintaining its position against the bracket 400.
[0037] In this embodiment, the bottom end of the connecting cylinder 200 can be interference-fitted with the insertion hole 410, or the bottom end of the connecting cylinder 200 can be welded and fixed to the inner wall of the insertion hole 410. The bottom surface of the convex ring 210 can be pasted and fixed to the bracket 400, or the bottom surface of the convex ring 210 can be welded and fixed to the bracket 400.
[0038] In some embodiments, an inwardly tapering flange 121 is provided at the bottom opening of the receiving groove. The flange 121 is located below the outer ring of the first bearing 300 to restrict the first bearing 300 from disengaging from the receiving groove and to strengthen the connection between the upper connecting seat 100 and the outer ring of the first bearing 300.
[0039] In some embodiments, the top plate 110 and the top seat 120 can be integrally formed, and the connecting cylinder 200 and the protruding ring 210 can be integrally formed, which facilitates the overall manufacturing of the components and can also strengthen the connection between them.
[0040] In some embodiments, such as Figure 4-6 As shown, there are two wheel bodies 500, which are coaxially arranged. This embodiment forms a double-wheel structure, which can increase the contact area with the ground and thus improve stability.
[0041] Furthermore, the bracket 400 includes two support arms 420, with the same screw 600 passing through the two support arms 420. A sleeve 620 is fitted onto the screw 600, and the sleeve 620 and two wheel bodies 500 are located between the two support arms 420. A second bearing 630 is provided on the inner side of the wheel body 500, and the wheel body 500 is fitted onto the outer ring of the second bearing 630. The inner ring of the second bearing 630 is fitted onto the sleeve 620.
[0042] The sleeve 620 can rotate relative to the screw 600, so that the wheel 500 can rotate relative to the screw 600.
[0043] Furthermore, a first limiting sleeve 640, a second limiting sleeve 650, and a third limiting sleeve 660 are also fitted onto the sleeve 620. The first limiting sleeve 640, the second limiting sleeve 650, and the third limiting sleeve 660 are all located between the two support arms 420. The first limiting sleeve 640, the second bearing 630 of one wheel 500, the second limiting sleeve 650, the second bearing 630 of the other wheel 500, and the third limiting sleeve 660 are sequentially arranged along the axial direction of the screw 600. The two ends of the first limiting sleeve 640 and the two ends of the third limiting sleeve 660 respectively abut against the inner ring of the adjacent support arm 420 and the second bearing 630, and the two ends of the second limiting sleeve 650 respectively abut against the inner ring of the two adjacent second bearings 630.
[0044] Multiple limiting sleeves restrict the axial movement of the second bearing 630 along the screw 600, ensuring that the wheel 500 remains relatively stable relative to the bracket 400. Furthermore, the separate arrangement of multiple limiting sleeves facilitates the assembly of the wheel 500 between the two support arms 420.
[0045] In some embodiments, both support arms 420 are provided with through holes, and screws 600 pass through the through holes of the two support arms 420. Nuts 610 are also fitted onto screws 600. The heads of nuts 610 and screws 600 are located on the outer sides of the two support arms 420 respectively. After tightening nuts 610, the heads of nuts 610 and screws 600 will restrict the screws 600 from moving axially.
[0046] The terms and words used in the foregoing description and claims are not limited to their literal meaning, but are merely used by the applicant to enable a clear and consistent understanding of the present invention. Therefore, those skilled in the art should understand that the foregoing description of various embodiments of the present invention is for illustrative purposes only, and not intended to limit the present invention as defined by the appended claims and their equivalents.
Claims
1. A high-load-bearing caster, characterized in that: The device includes an upper connecting seat, a connecting cylinder, a first bearing, a bracket, and a wheel. The wheel is rotatably connected to the bracket. The upper connecting seat includes a top plate and a top seat connected to the bottom surface of the top plate. The bottom surface of the top seat is provided with a receiving groove. The first bearing is located in the receiving groove, and the axial direction of the first bearing is parallel to the vertical direction. The upper connecting seat is fixedly connected to the outer ring of the first bearing. The upper end of the connecting cylinder is fixedly connected to the inner ring of the first bearing, and the lower end of the connecting cylinder is connected to the bracket.
2. The high load-bearing caster according to claim 1, characterized in that: The outer periphery of the connecting cylinder is provided with an outwardly protruding ring, which is located below the first bearing and abuts against the bracket.
3. The high load-bearing caster according to claim 2, characterized in that: The top end of the connecting cylinder is provided with an outwardly extending flange, which is located above the first bearing. The convex ring and the flange clamp and fix the inner ring of the first bearing.
4. The high load-bearing caster according to claim 3, characterized in that: The top plate is provided with a through hole communicating with the receiving groove, the top plate abuts against the outer ring of the first bearing, and the flange is located in the through hole.
5. The high load-bearing caster according to claim 2, characterized in that: The bracket is provided with a socket, and the bottom end of the connecting cylinder is inserted into the socket. The diameter of the socket is smaller than the outer diameter of the convex ring.
6. The high load-bearing caster according to claim 1, characterized in that: The bottom opening of the receiving groove is provided with an inwardly tapering flange, which is located below the outer ring of the first bearing.
7. The high-load-bearing caster according to any one of claims 1-6, characterized in that: The wheel body is provided in two parts, and the two wheels are coaxially arranged.
8. The high load-bearing caster according to claim 7, characterized in that: The bracket includes two support arms, with the same screw passing through both support arms. A sleeve is fitted onto the screw, and the sleeve and two wheels are located between the two support arms. A second bearing is provided on the inner side of the wheel, and the wheel is fitted onto the outer ring of the second bearing. The inner ring of the second bearing is fitted onto the sleeve.
9. The high-load-bearing caster according to claim 8, characterized in that: The sleeve is further fitted with a first limiting sleeve, a second limiting sleeve, and a third limiting sleeve, all of which are located between the two support arms. The first limiting sleeve, the second bearing of one wheel, the second limiting sleeve, the second bearing of the other wheel, and the third limiting sleeve are sequentially arranged along the axial direction of the screw. The two ends of the first limiting sleeve and the two ends of the third limiting sleeve respectively abut against the inner rings of the adjacent support arm and the second bearing, and the two ends of the second limiting sleeve abut against the inner rings of the two adjacent second bearings respectively.