Universal wheel support structure

Abstract

The utility model relates to a universal wheel support structure, which belongs to the technical field of universal wheel support, and comprises a support unit, a universal wheel and a connecting bolt. The support unit and the universal wheel are coaxially formed with a thread groove whose inner wall is provided with a thread. The universal wheel is coaxially provided with a hidden groove, the hidden groove is connected with the thread groove, the hidden groove is connected with one end face of the universal wheel, the connecting bolt is hidden in the hidden groove, and the connecting bolt is threadedly connected with the thread groove, so that the connecting bolt is hidden in the universal wheel, and the connection between the universal wheel and the support unit can also be achieved, thereby reducing the overall width of the device, and solving the problem that the existing support structure for unilateral support of the universal wheel is solved, and the connection between the support structure and the universal wheel is achieved by bolt connection, but because the bolt head between the connecting support structure and the universal wheel is exposed outside the universal wheel, the overall width of the device will actually be increased, thereby affecting the ability of the device to pass through narrow roads.

Description

Technical Field

[0001] The utility model belongs to the technical field of universal wheel supports, and in particular relates to a universal wheel support structure. Background Art

[0002] Universal wheels are widely used in various industries in today's society. Generally speaking, universal wheels need to be used with a supporting structure.

[0003] For example, the invention patent with patent application number: CN201210003220.0, which involves a low-profile, strong and durable universal wheel. The product is divided into two modules: a rotating frame and an axle wheel. It consists of only 19 parts, including fastening bolts, eccentric rotating frame, leakproof washers, rolling bearings, elastic pressure blocks, bolt guards, split pins, rolling bearings, elastic tires, rims, bearing retaining plates, axles, fixing washers, bearing retaining plates, etc., forming a universal wheel product with a unique structure.

[0004] Based on the search of the above patent authorization announcement number and the shortcomings found therein:

[0005] The existing support structure for unilaterally supporting the universal wheel is connected to the universal wheel by bolts. However, since the bolt heads connecting the support structure and the universal wheel are exposed outside the universal wheel, the overall width of the device is actually increased, which in turn affects the device's ability to pass through narrow roads. Utility Model Content

[0006] In order to solve the problem that the existing support structure for unilaterally supporting the universal wheel is connected to the universal wheel by bolt connection, but since the bolt heads connecting the support structure and the universal wheel are exposed outside the universal wheel, the overall width of the device will actually be increased, which will further affect the ability of the device to pass through narrow roads. The utility model provides a universal wheel support structure.

[0007] The purpose of the utility model can be achieved through the following technical solutions:

[0008] A universal wheel support structure, comprising a support unit, a universal wheel and a connecting bolt, wherein the support unit and the universal wheel are coaxially formed with a thread groove whose inner side wall is provided with a thread, the universal wheel is coaxially provided with a hidden groove, the hidden groove is communicated with the thread groove, and the hidden groove is communicated with one end surface of the universal wheel;

[0009] The connecting bolt includes a coaxially arranged threaded shaft and a connecting head, the outer diameter of the connecting head is smaller than the inner diameter of the hidden groove, the length of the connecting head is smaller than the length of the hidden groove, the length of the threaded shaft is smaller than the length of the threaded groove, and the threaded shaft is threadedly connected to the threaded groove to connect the support unit and the universal wheel.

[0010] As an optimal technical solution of the utility model, the universal wheel includes a universal wheel hub, a connecting bearing and a fixed shaft, the support unit includes a support top cover, a support side pillar and a support connecting shaft, one end of the support side pillar is connected to the support top cover, the support connecting shaft is arranged at the other end of the support side pillar, the fixed shaft is coaxially connected to the support connecting shaft, the support side pillar, the support connecting shaft and the fixed shaft jointly form a threaded groove, the fixed shaft is also provided with a hidden groove, the connecting bearing is coaxially sleeved at the connection between the fixed shaft and the support connecting shaft, the universal hub is coaxially provided with a universal slot hole, and the universal hub is coaxially connected to the outer side wall of the connecting bearing through the universal slot hole.

[0011] As a preferred technical solution of the utility model, the universal slot hole includes a coaxially arranged mounting slot hole and a limiting slot hole, the limiting slot hole is coaxially and centrally arranged in the universal wheel hub, the mounting slot hole is arranged at one end of the limiting slot hole close to the supporting connecting shaft, the inner diameter dimension of the mounting slot hole is larger than the inner diameter dimension of the limiting slot hole, the inner diameter dimension of the mounting slot hole is equal to the outer diameter dimension of the connecting bearing, and the connecting bearing is coaxially arranged in the mounting slot hole.

[0012] As a preferred technical solution of the present utility model, the width of the mounting slot hole is smaller than the width of the connecting bearing.

[0013] As a preferred technical solution of the utility model, the connecting bearing is respectively fitted with the end faces of the limiting slot and the supporting side pillar, and the central vertical plane of the connecting bearing coincides with the connection between the fixed shaft and the supporting connecting shaft.

[0014] As a preferred technical solution of the utility model, the universal wheel also includes a stabilizing bearing, two mounting slots are provided, the other mounting slot is relatively coaxially arranged at the other end of the limiting slot, the stabilizing bearing is located in the other mounting slot, and the stabilizing bearing is coaxially arranged at the other end of the fixed shaft.

[0015] As a preferred technical solution of the utility model, the universal wheel includes a coaxially connected positioning shaft and a limit block, the positioning shaft is threadedly engaged with one end of the hidden groove away from the supporting side pillar, the diameter of the positioning shaft is smaller than the outer diameter of the fixed shaft, the diameter of the limit block is larger than the outer diameter of the fixed shaft, and the two end faces of the stabilizing bearing are respectively fitted with the other end face of the limit slot and the end face of the limit block.

[0016] As a preferred technical solution of the utility model, the support top cover includes a support connecting cover, an arc cover and a fixing bolt. The support connecting cover is arranged on the top of the universal hub, the support connecting cover is fixedly connected to one end of the support side pillar, the arc cover is located between the universal hub and the support connecting cover, the arc cover is connected to the support connecting cover by the fixing bolt, and the fixing bolt is vertically arranged.

[0017] As a preferred technical solution of the utility model, it also includes a rotating shell and a rotating bearing. The rotating shell is rotatably arranged on the top of the supporting and connecting cover. The rotating shell and the supporting and connecting cover together form a rotating space. The rotating bearing is arranged in the rotating space. There is a gap between the rotating shell and the supporting and connecting cover along the central axis direction of the rotating bearing.

[0018] As a preferred technical solution of the utility model, it also includes a rotating bolt, the rotating shell and the supporting connecting cover jointly form a rotating groove, the rotating bolt is hidden in the rotating groove and meshingly connected with the rotating groove, and the central axis of the rotating bolt and the central axis of the fixing bolt coincide with each other.

[0019] The beneficial effects of the utility model are:

[0020] The utility model provides a universal wheel support structure, including a support unit, a universal wheel and a connecting bolt. The support unit and the universal wheel are coaxially formed with a thread groove with a thread on the inner wall. The universal wheel is coaxially provided with a hidden groove, the hidden groove and the thread groove are connected to each other, and the hidden groove is connected to one end surface of the universal wheel. The connecting bolt is hidden in the hidden groove, and the connecting bolt is threadedly connected to the thread groove, so that the connecting bolt is hidden in the universal wheel, and the connection between the universal wheel and the support unit can also be achieved, thereby reducing the overall width of the device, solving the problem that the existing support structure for unilateral support of the universal wheel is solved, and the connection between the support structure and the universal wheel is achieved by bolt connection. However, since the bolt head between the support structure and the universal wheel is exposed outside the universal wheel, the overall width of the device will actually be increased, thereby affecting the ability of the device to pass through narrow roads. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0022] Figure 1 This is an overall diagram of a universal wheel support structure of the utility model;

[0023] Figure 2 This is a front view of a universal wheel support structure of the utility model;

[0024] Figure 3 A cross-sectional view of a universal wheel of a universal wheel support structure of the utility model;

[0025] Figure 4 A diagram of connecting bolts of a universal wheel support structure of the utility model;

[0026] Figure 5 The utility model is a cross-sectional view of a support unit of a universal wheel support structure.

[0027] Description of main symbols

[0028] In the figure: 1. support unit; 101. support top cover; 1011. support connecting cover; 1012. arc cover; 1013. fixing bolt; 102. support side pillar; 103. support connecting shaft; 2. universal wheel; 201. universal wheel hub; 202. connecting bearing; 203. fixing shaft; 204. stabilizing bearing; 205. positioning shaft; 206. limit block; 3. connecting bolt; 301. threaded shaft; 302. connecting head; 4. rotating shell; 5. rotating bearing; 6. rotating bolt. DETAILED DESCRIPTION

[0029] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0030] See also Figure 1-5 The present embodiment provides a universal wheel support structure, including a support unit 1, a universal wheel 2 and a connecting bolt 3. The support unit 1 and the universal wheel 2 are coaxially formed with a thread groove with a thread on the inner side wall. The universal wheel 2 is coaxially provided with a hidden groove, the hidden groove is connected with the thread groove, and the hidden groove is connected with one end surface of the universal wheel 2;

[0031] The connecting bolt 3 includes a coaxially arranged threaded shaft 301 and a connecting head 302, the outer diameter of the connecting head 302 is smaller than the inner diameter of the hidden groove, the length of the connecting head 302 is smaller than the length of the hidden groove, the length of the threaded shaft 301 is smaller than the length of the threaded groove, and the threaded shaft 301 is threadedly connected with the threaded groove to achieve the connection between the support unit 1 and the universal wheel 2; this solution is provided with a hidden groove and a threaded groove, and the setting of the threaded groove enables the connecting bolt 3 to connect the support unit 1 and the universal wheel 2; and the setting of the hidden groove enables the connecting bolt 3 to be hidden in the universal wheel 2, thereby reducing the overall width of the device, and solves the existing support structure for unilateral support of the universal wheel 2, and the connection between the supporting structure and the universal wheel 2 is achieved by bolt connection, but because the bolt head between the connecting support structure and the universal wheel 2 is exposed outside the universal wheel 2, the overall width of the device will actually be increased, thereby affecting the problem of the device's ability to pass through narrow roads.

[0032] Specifically, the universal wheel 2 of the present invention includes a universal wheel hub 201, a connecting bearing 202 and a fixed shaft 203, the support unit 1 includes a support top cover 101, a support side support 102 and a support connecting shaft 103, one end of the support side support 102 is connected to the support top cover 101, the support connecting shaft 103 is arranged at the other end of the support side support 102, the fixed shaft 203 is coaxially connected with the support connecting shaft 103, the support side support 102, the support connecting shaft 103 and the fixed shaft 203 are jointly formed with a thread groove, the fixed shaft 203 is also provided with a hidden groove, the connecting bearing 202 is coaxially sleeved at the connection between the fixed shaft 203 and the support connecting shaft 103, the universal wheel hub 201 is coaxially provided with a universal slot hole, and the universal wheel hub 201 is coaxially provided with a universal slot hole. The wheel hub 201 is coaxially connected to the outer wall of the connecting bearing 202 through a universal slot hole; in the present embodiment, the hidden groove and the threaded groove are both arranged in the fixed shaft 203, the connecting bolt 3 coaxially connects the fixed shaft 203 and the supporting connecting shaft 103, and the connecting bearing 202 is coaxially sleeved at the connection between the fixed shaft 203 and the supporting connecting shaft 103, which further ensures the coaxial connection relationship between the fixed shaft 203 and the supporting connecting shaft 103. In addition, due to the setting relationship of the connecting bearing 202, the connection relationship between the fixed shaft 203 and the supporting connecting shaft 103 is strengthened, preventing the fixed shaft 203 from releasing its coaxial connection relationship with the supporting connecting shaft 103 due to the pressure on the fixed shaft 203.

[0033] Furthermore, in order to limit the movement of the connecting bearing 202, the universal slot of the present invention comprises a coaxially arranged mounting slot and a limiting slot, and the limiting slot is coaxially arranged in the center of the universal hub 201. It is worth noting that the limiting slot of the present invention is located in the middle of the fixed tube, and the mounting slot is arranged at one end of the limiting slot close to the supporting connecting shaft 103, that is, the mounting slot is located at one end of the fixed tube close to the supporting connecting shaft 103, and the inner diameter of the mounting slot is larger than the inner diameter of the limiting slot, and the mounting slot The inner diameter dimension is equal to the outer diameter dimension of the connecting bearing 202, and the connecting bearing 202 is coaxially arranged in the mounting slot hole; since the inner diameter dimension of the mounting slot hole is larger than the inner diameter dimension of the limiting slot hole, when the connecting bearing 202 is installed in the mounting slot hole, one end face of the connecting bearing 202 fits with the end face of the limiting slot hole, and the other end face of the connecting bearing 202 fits with the end face of the supporting side pillar 102, thereby limiting the movement of the connecting bearing 202 and ensuring that the connecting bearing 202 rotates in the mounting slot hole.

[0034] It is worth noting that the width of the installation slot of the present solution is smaller than the width of the connecting bearing 202, so that when the two end faces of the connecting bearing 202 respectively fit with the end faces of the supporting side pillar 102 and the end faces of the limiting slot, the universal hub 201 will not fit with the end faces of the supporting side pillar 102, thereby ensuring that the rotation of the universal hub 201 will not interfere with the supporting side pillar 102. It should be emphasized that the connecting bearing 202 of the present solution fits with the end faces of the limiting slot and the supporting side pillar 102 respectively, and the central vertical plane of the connecting bearing 202 coincides with the connection between the fixed shaft 203 and the supporting connecting shaft 103. Such a setting makes the length of the part of the connecting bearing 202 sleeved on the fixed shaft 203 and the length of the part of the supporting connecting shaft 103 the same, so that the force of the connecting bearing 202 distributed to the fixed shaft 203 and the supporting connecting shaft 103 is consistent, further extending the service life of the device.

[0035] Furthermore, the universal wheel 2 of the present embodiment also includes a stabilizing bearing 204, which has two mounting slots. The other mounting slot is relatively coaxially arranged at the other end of the limiting slot. The stabilizing bearing 204 is located in the other mounting slot. The stabilizing bearing 204 is coaxially arranged at the other end of the fixed shaft 203. Through such an arrangement, it is ensured that the two ends of the fixed shaft 203 are subjected to consistent force, thereby avoiding the situation where one end of the fixed shaft 203 is subjected to excessive force and bends.

[0036] Furthermore, the universal wheel 2 of the present scheme includes a coaxially connected positioning shaft 205 and a limit block 206, the side wall of the positioning shaft 205 is provided with a thread, and the end of the hidden groove away from the supporting side pillar 102 is also provided with a thread, the positioning shaft 205 is threadedly engaged with the end of the hidden groove away from the supporting side pillar 102, the diameter of the positioning shaft 205 is smaller than the outer diameter of the fixed shaft 203, the diameter of the limit block 206 is larger than the outer diameter of the fixed shaft 203, and the two end faces of the stabilizing bearing 204 are respectively fitted with the other end face of the limit slot and the end face of the limit block 206, thereby limiting the position of the stabilizing bearing 204. In addition, such a connection method also limits the movement of the universal hub 201, so that the universal hub 201 can only rotate relative to the fixed shaft 203, but cannot move relative to the fixed shaft 203.

[0037] Furthermore, the support top cover 101 of the present scheme includes a support connection cover 1011, an arc cover 1012 and a fixing bolt 1013. The support connection cover 1011 is arranged on the top of the universal hub 201. The support connection cover 1011 is fixedly connected to one end of the support side pillar 102. The arc cover 1012 is located between the universal hub 201 and the support connection cover 1011. The arc cover 1012 is connected to the support connection cover 1011 by a fixing bolt 1013, and the fixing bolt 1013 is vertically arranged.

[0038] In addition, the present solution also includes a rotating shell 4 and a rotating bearing 5. The rotating shell 4 is rotatably arranged on the top of the supporting and connecting cover 1011. The rotating shell 4 and the supporting and connecting cover 1011 jointly form a rotating space. The rotating bearing 5 is arranged in the rotating space. There is a gap between the rotating shell 4 and the supporting and connecting cover 1011 along the central axis direction of the rotating bearing 5. Such an arrangement ensures that when the supporting and connecting cover 1011 rotates relative to the rotating shell 4, the friction between the two will not increase due to the fit.

[0039] Furthermore, the present scheme also includes a rotating bolt 6, and the rotating shell 4 and the supporting connecting cover 1011 jointly form a rotating groove, the rotating bolt 6 is hidden in the rotating groove, and is meshed with the rotating groove, and the central axis of the rotating bolt 6 and the central axis of the fixing bolt 1013 coincide with each other; such a setting makes the structural strength of the fixing bolt 1013 in the supporting connecting cover 1011 reach the maximum, and the weight of the rotating shell 4 will be transferred to the supporting connecting cover 1011 through the rotating bolt 6. Since the central axis of the rotating bolt 6 and the central axis of the fixing bolt 1013 coincide with each other, the weight of the rotating shell 4 will be transferred to the structural support of the fixing bolt 1013 of the supporting connecting cover 1011, and the structural strength of the fixing bolt 1013 in the supporting connecting cover 1011 is the largest, so it can be ensured that the structure of the supporting connecting cover 1011 will not be deformed during the operation of the device.

[0040] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A universal wheel support structure, characterized in that: It comprises a support unit, a universal wheel and a connecting bolt, wherein the support unit and the universal wheel are coaxially formed with a thread groove whose inner side wall is provided with a thread, the universal wheel is coaxially provided with a hidden groove, the hidden groove is connected with the thread groove, and the hidden groove is connected with one end surface of the universal wheel; The connecting bolt includes a coaxially arranged threaded shaft and a connecting head, the outer diameter of the connecting head is smaller than the inner diameter of the hidden groove, the length of the connecting head is smaller than the length of the hidden groove, the length of the threaded shaft is smaller than the length of the threaded groove, and the threaded shaft is threadedly connected to the threaded groove to connect the support unit and the universal wheel.

2. The universal wheel support structure according to claim 1, characterized in that: The universal wheel includes a universal wheel hub, a connecting bearing and a fixed shaft, the supporting unit includes a supporting top cover, a supporting side pillar and a supporting connecting shaft, one end of the supporting side pillar is connected to the supporting top cover, the supporting connecting shaft is arranged at the other end of the supporting side pillar, the fixed shaft is coaxially connected to the supporting connecting shaft, the supporting side pillar, the supporting connecting shaft and the fixed shaft are jointly formed with a threaded groove, the fixed shaft is also provided with a hidden groove, the connecting bearing is coaxially sleeved at the connection between the fixed shaft and the supporting connecting shaft, the universal wheel hub is coaxially provided with a universal slot hole, and the universal wheel hub is coaxially connected to the outer side wall of the connecting bearing through the universal slot hole.

3. The universal wheel support structure according to claim 2, characterized in that: The universal slot hole includes a coaxially arranged mounting slot hole and a limiting slot hole, the limiting slot hole is coaxially and centrally arranged in the universal wheel hub, the mounting slot hole is arranged at one end of the limiting slot hole close to the supporting connecting shaft, the inner diameter dimension of the mounting slot hole is larger than the inner diameter dimension of the limiting slot hole, the inner diameter dimension of the mounting slot hole is equal to the outer diameter dimension of the connecting bearing, and the connecting bearing is coaxially arranged in the mounting slot hole.

4. The universal wheel support structure according to claim 3, characterized in that: The width of the mounting slot hole is smaller than the width of the connecting bearing.

5. The universal wheel support structure according to claim 3, characterized in that: The connecting bearing is respectively fitted with the end surface of the limiting slot and the supporting side support, and the central vertical surface of the connecting bearing coincides with the connection between the fixed shaft and the supporting connecting shaft.

6. The universal wheel support structure according to claim 3, characterized in that: The universal wheel also includes a stabilizing bearing. Two mounting slots are provided. The other mounting slot is coaxially arranged at the other end of the limiting slot. The stabilizing bearing is located in the other mounting slot. The stabilizing bearing is coaxially arranged at the other end of the fixed shaft.

7. The universal wheel support structure according to claim 6, characterized in that: The universal wheel includes a coaxially connected positioning shaft and a limit block, the positioning shaft is threadedly engaged with one end of the hidden groove away from the supporting side pillar, the diameter of the positioning shaft is smaller than the outer diameter of the fixed shaft, the diameter of the limit block is larger than the outer diameter of the fixed shaft, and the two end faces of the stabilizing bearing are respectively fitted with the other end face of the limit slot and the end face of the limit block.

8. The universal wheel support structure according to claim 6, characterized in that: The support top cover includes a support connecting cover, an arc cover and a fixing bolt. The support connecting cover is arranged on the top of the universal hub. The support connecting cover is fixedly connected to one end of the support side pillar. The arc cover is located between the universal hub and the support connecting cover. The arc cover is connected to the support connecting cover through the fixing bolt, and the fixing bolt is vertically arranged.

9. The universal wheel support structure according to claim 8, characterized in that: It also includes a rotating shell and a rotating bearing. The rotating shell is rotatably arranged on the top of the supporting and connecting cover. The rotating shell and the supporting and connecting cover together form a rotating space. The rotating bearing is arranged in the rotating space. There is a gap between the rotating shell and the supporting and connecting cover along the central axis direction of the rotating bearing.

10. The universal wheel support structure according to claim 9, characterized in that: It also includes a rotating bolt, the rotating shell and the supporting connection cover jointly form a rotating groove, the rotating bolt is hidden in the rotating groove and meshed with the rotating groove, and the central axis of the rotating bolt and the central axis of the fixing bolt coincide with each other.

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