Tire replacement device for automobile maintenance

Abstract

The utility model provides an automobile maintenance tire replacing device which comprises a rack, a placing table is arranged on the rack, a positioning assembly is arranged on the placing table, mounting parts are fixedly arranged on the two sides of the placing table, each mounting part is provided with an abutting part, and the abutting parts are used for abutting against the tread of a tire. The abutting parts are in sliding connection with the mounting part, a first elastic piece is arranged on the mounting part and used for applying acting force to the abutting parts so that the two abutting parts can move in the direction close to each other, a limiting piece is arranged on the mounting part and used for limiting the positions of the abutting parts on the mounting part, and the limiting piece is used for limiting the positions of the abutting parts on the mounting part. The automobile tire positioning device can improve the automobile tire positioning effect.

Description

Technical Field

[0001] This utility model relates to the field of automotive repair technology, and more specifically, to an automotive tire replacement device. Background Technology

[0002] The content in this section only provides background information related to this utility model and may not constitute prior art.

[0003] Automotive repair is a general term for the maintenance and repair of automobiles. It involves using technical means to troubleshoot and find the cause of a malfunctioning vehicle. As the only part of a car that comes into contact with the ground, the tires are usually the most prone to problems. When a car tire malfunctions, it is usually necessary to remove and replace it.

[0004] Chinese patent CN222040139U discloses a vehicle repair tire replacement device, which includes a vehicle body and a repair trolley located under the vehicle body. When installing a tire, the tire is placed on a placement box, and the tire is clamped onto the placement box by adjusting blocks, after which the tire can be installed.

[0005] However, the aforementioned technologies have the following drawbacks: when positioning the tire on the mounting box, the tire's axial direction is only positioned by adjusting the block. When there is a deviation between the tire's axis and the installation position, the tire's axis can only be aligned with the axis of the tire positioning post by adjusting the position of the mounting box. The positioning operation is cumbersome, time-consuming, and labor-intensive. Utility Model Content

[0006] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a tire replacement device for automobile repair, which can improve the positioning effect of automobile tires.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] A tire replacement device for automobile repair includes a frame, a placement platform on the frame, a positioning component on the placement platform, mounting portions fixedly mounted on both sides of the placement platform, and an abutment portion on each mounting portion for contacting the tire tread. The abutment portion and the mounting portion are slidably connected. A first elastic member is provided on the mounting portion for applying a force to the abutment portion to move the two abutment portions toward each other. A limiting member is provided on the mounting portion for limiting the position of the abutment portion on the mounting portion.

[0009] By adopting the above technical solution, in actual use, the tire is placed on the placement platform, and then the tire sidewall is clamped and positioned by the positioning component. During this process, the limiting member releases the restriction on the position of the abutment part on the mounting part. Then, under the action of the first elastic member, the abutment part moves towards each other, thereby abutting the abutment part against the tire tread. This abuts and positions the tire in a direction perpendicular to the tire axis. By positioning the tire in two mutually perpendicular directions through the positioning component and the abutment part, the positioning effect of the car tire can be effectively improved, thereby ensuring that the tire axis matches the tire positioning axis, simplifying the tire positioning operation, and improving the efficiency of tire positioning.

[0010] In some possible embodiments, a sliding groove is provided at the top of the mounting part, a sliding block is slidably disposed in the sliding groove, a mounting groove is provided at the top of the sliding block, the abutting part is vertically disposed in the mounting groove, the top end of the abutting part extends out of the mounting groove and contacts the tire tread, the abutting part is rotatably connected to the inner wall of the mounting groove, a second elastic member is provided on the abutting part, the second elastic member acts on the abutting part to keep the abutting part in a vertical state, and the limiting member is used to limit the position of the sliding block in the sliding groove.

[0011] By adopting the above technical solution, when positioning the tire, after the tire comes into contact with the contact part, the contact part deflects in a direction away from each other under the force of the tire, thereby improving the applicability of the tire gear within a certain range. At the same time, when inspecting the tire, it improves the support stability of the tire. Compared with vertical support, the support force of diagonal support is more stable, which can further facilitate the subsequent maintenance of the tire by the staff.

[0012] In some possible embodiments, the limiting member is configured as a limiting pin, and a strip hole is provided in the horizontal direction on the side wall of the mounting part. The limiting member is slidably disposed in the strip hole. A limiting hole for the limiting member to be inserted is provided on the side wall of the sliding block. The limiting hole is provided through the limiting member. A positioning member is provided on the limiting member. The positioning member is used to limit the position of the limiting member in the strip hole.

[0013] By adopting the above technical solution, when a tire needs to be installed, the limiting component moves away from the limiting hole, and at the same time, the positioning component releases the limitation on the position of the limiting component in the positioning hole. At this time, the sliding block can move in the sliding groove. After the sliding block moves to the predetermined position, the positioning component limits the position of the limiting component in the strip hole. At this time, the limiting component re-inserts into the limiting hole, thereby completing the limitation on the position of the sliding block in the sliding groove. This not only ensures the overall applicability of the device and allows the position of the sliding block to be adjusted according to different tire sizes, but also prevents tire displacement during installation, thus having good practicality.

[0014] In some possible embodiments, the limiting hole is a square hole, and a block is fixedly provided at the end of the limiting member. The block is adapted to the square hole, and one end of the block located in the mounting groove is set as an inclined surface. The inclined surface of the block is slidably connected to the bottom end of the abutment part. A third elastic element is provided on the sliding block. The third elastic element acts on the limiting member to make the limiting member move toward the sliding groove.

[0015] In some possible embodiments, the positioning element is configured as a positioning gear, the positioning element is coaxially fixedly sleeved on the limiting element, a positioning rack is fixedly provided on the inner wall of the strip hole along the length direction of the strip hole, the positioning rack meshes with the positioning gear, and a pull ring is fixedly provided at the end of the positioning element away from the sliding groove.

[0016] By adopting the above technical solution, when the tire is placed on the placement platform, the tire tread first abuts against the contact part. Then, under the force of the tire, the contact part deflects in a direction away from the contact point. As the contact part deflects, its bottom end abuts against the inclined surface of the block. This further pushes the block into the limiting hole. At this time, the sliding block moves towards the tire under the action of the first elastic element, causing the block to completely disengage from the limiting hole. As the block completely disengages from the limiting hole, the positioning gear disengages from the positioning rack. The sliding block can then slide within the sliding groove, with the end of the block abutting against the side wall of the sliding block. After the block slides to the predetermined position, it drives the limiting component to move within the slot. When the block coincides with the limiting hole, the block can be inserted into the limiting hole under the action of the third elastic component. At this time, the positioning gear and the positioning rack re-mesh, thereby limiting the position of the sliding block within the sliding groove. During the process of placing the tire on the placement platform and positioning the tire, the tire drives the abutment part to deflect, thereby driving the limiting component to move. There is no need for the staff to manually pull the limiting component, reducing the workload of the staff. In the subsequent process of installing the tire to the tire mounting shaft, limiting the position of the sliding block can prevent the tire from shifting, which has good practicality.

[0017] In some possible embodiments, a connecting block is slidably disposed within the strip-shaped hole along its length. A connecting hole is formed on the connecting block along the axial direction of the limiting member. The limiting member is slidably disposed within the connecting hole. An mounting hole is formed inside the connecting block along the axial direction of the connecting hole. The diameter of the mounting hole is larger than the diameter of the connecting hole. The mounting hole communicates with the connecting hole. An mounting ring is coaxially fixedly sleeved on the limiting member. The mounting ring is slidably disposed within the mounting hole. The third elastic member is a compression spring. The third elastic member is sleeved on the limiting member. One end of the third elastic member abuts against the mounting ring, and the other end abuts against the inner wall of the mounting hole.

[0018] In some possible embodiments, the first elastic element is configured as a tension spring, the first elastic element is located in the sliding groove, one end of the first elastic element is fixedly connected to the inner wall of the sliding groove, and the other end is fixedly connected to the side wall of the sliding block.

[0019] In some possible embodiments, a rotating hole is provided on the side wall of the mounting groove, and a rotating rod is fixedly provided on the side wall of the abutment portion. The rotating rod is rotatably disposed in the rotating hole. The second elastic element is a torsion spring, which is sleeved on the rotating rod. One end of the second elastic element is fixedly connected to the rotating rod, and the other end is fixedly connected to the inner wall of the rotating hole.

[0020] In some possible embodiments, an abutment roller is rotatably disposed on top of the abutment portion, the abutment roller being used to make rolling contact with the tire tread.

[0021] By adopting the above technical solution, the sliding friction between the top of the contact part and the tire tread is transformed into rolling friction by setting the contact roller, which significantly reduces the friction between the contact part and the tire tread, thereby improving the protection effect on the tire tread.

[0022] In summary, the technical solution of this utility model embodiment has at least the following advantages and beneficial effects:

[0023] 1. By positioning the tire in two mutually perpendicular directions using positioning components and abutment parts, the tire positioning effect can be effectively improved, thereby ensuring that the tire axis matches the tire positioning axis, simplifying the tire positioning operation and improving the efficiency of tire positioning.

[0024] 2. Under the force of the tire, the contact part deflects in a direction away from each other, thereby improving the applicability to the tire gears within a certain range, and improving the support stability of the tire during tire maintenance.

[0025] 3. The position of the limiting member in the slot is limited by the positioning member. At this time, the limiting member is reinserted into the limiting hole, thereby completing the limitation of the position of the sliding block in the sliding groove. This not only ensures the overall applicability of the device, but also allows the position of the sliding block to be adjusted according to different tire sizes. At the same time, it avoids tire displacement when installing tires, thus having good practicality.

[0026] 4. During the process of placing the tire on the placement platform and positioning the tire, the tire drives the abutment part to deflect, which in turn moves the limiting part. This eliminates the need for workers to manually pull the limiting part, reducing their workload. In the subsequent process of installing the tire to the tire mounting shaft, the position of the sliding block is limited, which can prevent the tire from shifting, making it highly practical. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0028] Figure 2 This is a schematic diagram of the structure of the placement platform and mounting part of this utility model;

[0029] Figure 3 This is an exploded structural diagram of the sliding block of this utility model;

[0030] Figure 4 This is a cross-sectional view of the sliding block and a structural schematic diagram of the second elastic element of this utility model;

[0031] Figure 5 This is a cross-sectional view of the connecting block and a structural schematic diagram of the third elastic element of this utility model;

[0032] Figure 6 This is a cross-sectional view of the sliding block and mounting block of this utility model when no tire is placed on them;

[0033] Figure 7 This is a cross-sectional view of the sliding block and mounting block after the tire is placed in this utility model.

[0034] Icons: 1. Frame; 11. Placement platform; 12. Mounting part; 13. Abutment part; 14. Tire; 2. Positioning assembly; 21. Positioning plate; 211. Positioning groove; 212. Positioning block; 22. Drive device; 221. Drive motor; 222. Lead screw; 3. First elastic element; 4. Limiting element; 5. Sliding groove; 51. Sliding block; 52. Mounting groove; 53. Second elastic element; 54. Rotating hole; 55. Rotating rod; 6. Strip hole; 61. Limiting hole; 62. Positioning element; 63. Block; 64. Inclined surface; 65. Third elastic element; 66. Positioning rack; 67. Pull ring; 7. Connecting block; 71. Connecting hole; 72. Mounting hole; 73. Mounting ring; 8. Abutment roller. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] The following is for reference Figures 1 to 5 The present invention will be described in further detail below.

[0037] Reference Figure 1 and Figure 2A tire changing device for automobile repair includes a frame 1, a placement platform 11 on the frame 1, a lifting rod fixedly installed at the bottom of the frame 1, a support plate installed at the bottom of the lifting rod, and self-locking casters installed at the four corners of the bottom of the support plate. Figure 1 As shown, in actual use, the tire 14 is placed on the placement platform 11. A positioning component 2 is provided on the placement platform 11, and mounting parts 12 are fixedly provided on both sides of the placement platform 11. Each mounting part 12 is provided with an abutment part 13, which is used to abut against the tire tread. The abutment part 13 and the mounting part 12 are slidably connected.

[0038] Reference Figure 2 In one embodiment of this utility model, the positioning component 2 includes a positioning plate 21 and a driving device 22. A positioning groove 211 is provided on the top of the placement platform 11, and a positioning block 212 is slidably disposed in the positioning groove 211. Two positioning blocks 212 are provided, and two corresponding positioning plates 21 are also provided. The positioning plates 21 and positioning blocks 212 are fixedly connected one-to-one. In another embodiment of this utility model, the driving device 22 includes a driving motor 221 and a lead screw 222. The lead screw 222 is rotatably disposed in the positioning groove 211 along the length direction of the positioning groove 211. The driving motor 221 is fixedly installed on the side wall of the placement platform 11. One end of the lever 222 is rotatably connected to the inner wall of the positioning groove 211, and the other end is driven to the output shaft of the drive motor 221. The lead screw 222 is set as a bidirectional lead screw 222, that is, the spirals at both ends of the lead screw 222 are in opposite directions. Two positioning blocks 212 are respectively threaded onto both ends of the lead screw 222. In actual use, the drive motor 221 is started, and the drive motor 221 drives the lead screw 222 to rotate. As the lead screw 222 rotates, it can drive the positioning blocks 212 to move in the positioning groove 211 toward each other or away from each other, thereby driving the positioning plate 21 to move in the same direction, thus achieving clamping of the tire sidewall.

[0039] Reference Figure 2 and Figure 3 A first elastic member 3 is provided on the mounting part 12. The first elastic member 3 is used to apply a force to the abutting part 13 so that the two abutting parts 13 move toward each other.

[0040] Reference Figure 3 A limiting member 4 is provided on the mounting part 12, which is used to limit the position of the abutment part 13 on the mounting part 12.

[0041] Reference Figure 3 and Figure 4A sliding groove 5 is provided at the top of the mounting part 12, and a sliding block 51 is slidably disposed in the sliding groove 5. A mounting groove 52 is provided at the top of the sliding block 51. A contact part 13 is vertically disposed in the mounting groove 52. The top end of the contact part 13 extends out of the mounting groove 52 and contacts the tire tread. The contact part 13 is rotatably connected to the inner wall of the mounting groove 52. A second elastic member 53 is provided on the contact part 13. The second elastic member 53 acts on the contact part 13 to keep the contact part 13 in a vertical state. The limiting member 4 is used to limit the position of the sliding block 51 in the sliding groove 5.

[0042] As one embodiment of this utility model, refer to Figure 2 and Figure 3 The first elastic element 3 is configured as a tension spring. The first elastic element 3 is located in the sliding groove 5. One end of the first elastic element 3 is fixedly connected to the inner wall of the sliding groove 5, and the other end is fixedly connected to the side wall of the sliding block 51.

[0043] Reference Figure 4 A rotating hole 54 is provided on the side wall of the mounting groove 52, and a rotating rod 55 is fixedly provided on the side wall of the abutment part 13. The rotating rod 55 is rotatably disposed in the rotating hole 54. As one embodiment of this utility model, see reference. Figure 4 The second elastic element 53 is a torsion spring. The second elastic element 53 is sleeved on the rotating rod 55. One end of the second elastic element 53 is fixedly connected to the rotating rod 55, and the other end is fixedly connected to the inner wall of the rotating hole 54.

[0044] When positioning the tire, after the tire comes into contact with the abutment part 13, the abutment part 13 deflects in a direction away from each other under the force of the tire, thereby improving the applicability of the tire gear within a certain range. At the same time, when the tire is being inspected, the support stability of the tire is improved. Compared with vertical support, the support force of diagonal support is more stable, which can further facilitate the subsequent maintenance of the tire by the staff.

[0045] Reference Figure 4 In one embodiment of this utility model, the limiting member 4 is configured as a limiting pin. A strip hole 6 is provided in the horizontal direction on the side wall of the mounting part 12. The limiting member 4 is slidably disposed in the strip hole 6. A limiting hole 61 for the limiting member 4 to be inserted is provided in the side wall of the sliding block 51. The limiting hole 61 is provided through. A positioning member 62 is provided on the limiting member 4. The positioning member 62 is used to limit the position of the limiting member 4 in the strip hole 6.

[0046] Reference Figure 4 and Figure 5The limiting hole 61 is a square hole, and a square block 63 is fixedly provided at the end of the limiting member 4. The square block 63 is adapted to the square hole. One end of the square block 63 located in the mounting groove 52 is set as an inclined surface 64. The inclined surface 64 of the square block 63 is slidably connected to the bottom end of the abutment part 13. A third elastic member 65 is provided on the sliding block 51. The third elastic member 65 acts on the limiting member 4 to make the limiting member 4 move toward the sliding groove 5.

[0047] Reference Figure 3 and Figure 5 As one embodiment of this utility model, the positioning member 62 is configured as a positioning gear. The positioning member 62 is coaxially fixedly sleeved on the limiting member 4. A positioning rack 66 is fixedly provided on the inner wall of the strip hole 6 along the length direction of the strip hole 6. The positioning rack 66 meshes with the positioning gear. A pull ring 67 is fixedly provided at the end of the positioning member 62 away from the sliding groove 5.

[0048] Reference Figure 3 and Figure 5 A connecting block 7 is slidably disposed within the strip-shaped hole 6 along its length. A connecting hole 71 is formed on the connecting block 7 along the axial direction of the limiting member 4. The limiting member 4 slidably passes through the connecting hole 71. An mounting hole 72 is formed inside the connecting block 7 along the axial direction of the connecting hole 71. The diameter of the mounting hole 72 is larger than the diameter of the connecting hole 71, and the mounting hole 72 communicates with the connecting hole 71. An mounting ring 73 is coaxially fixedly sleeved on the limiting member 4, and the mounting ring 73 is slidably disposed within the mounting hole 72. This is one embodiment of the present invention. (Refer to...) Figure 5 The third elastic element 65 is configured as a compression spring. The third elastic element 65 is sleeved on the limiting element 4. One end of the third elastic element 65 abuts against the mounting ring 73, and the other end abuts against the inner wall of the mounting hole 72.

[0049] As one embodiment of this utility model, refer to Figure 6 The length of block 63 is greater than the depth of the limiting hole 61. Simultaneously, the side wall of the abutment portion 13 slides in contact with the inner wall of the mounting groove 52. The width of the abutment portion 13 matches the width of the mounting groove 52. The inclined surface 64 of block 63 is oriented away from the first elastic member 3. When no tire is placed, the position of block 63 is as follows: Figure 6 As shown, the side of block 63 away from the first elastic member 3 abuts against the inner wall of the limiting hole 61, thereby limiting the position of sliding block 51 in sliding groove 5.

[0050] When the tire is placed on the placement platform 11, the tire tread first comes into contact with the contact part 13. Then, under the force of the tire, the contact part 13 deflects in a direction away from the contact point. As the contact part 13 deflects, its bottom end comes into contact with the inclined surface 64 of the block 63. This further pushes the block 63 into the limiting hole 61. Figure 7 As shown, since the inclined surface 64 of the block 63 abuts against the wall of the limiting hole 61 at this time, the sliding block 51 can move towards the tire under the action of the first elastic member 3, so that the block 63 completely disengages from the limiting hole 61. As the block 63 completely disengages from the limiting hole 61, the positioning gear also disengages from the positioning rack 66. At this time, the sliding block 51 can slide in the sliding groove 5, and the end of the block 63 abuts against the side wall of the sliding block 51. When the sliding block 51 slides to the predetermined position, it drives the limiting member 4 to move in the strip hole 6, and then drives the connecting block 7 to move in the strip hole 6. When the block 63 and the limiting member 61 are in contact, the sliding block 51 can move towards the tire under the action of the first elastic member 3, so that the block 63 completely disengages from the limiting hole 61. After the holes 61 are aligned, the block 63 can be inserted into the limiting hole 61 under the action of the third elastic element 65. At this time, the positioning gear and the positioning rack 66 re-mesh, thereby limiting the position of the sliding block 51 in the sliding groove 5. During the process of placing the tire on the placement platform 11 and positioning the tire, the tire drives the abutment part 13 to deflect, thereby driving the limiting element 4 to move. There is no need for the staff to manually pull the limiting element 4, which reduces the workload of the staff. In the subsequent process of installing the tire to the tire mounting shaft, limiting the position of the sliding block 51 can prevent the tire from shifting, which has good practicality.

[0051] Reference Figure 4 An abutment roller 8 is rotatably disposed on the top of the abutment portion 13, and the abutment roller 8 is used to make rolling contact with the tire tread. By setting the abutment roller 8, the sliding friction between the top of the abutment portion 13 and the tire tread is transformed into rolling friction, which significantly reduces the friction between the abutment portion 13 and the tire tread, thereby improving the protection effect on the tire tread.

[0052] The implementation principle of the automobile tire replacement device proposed in this embodiment is as follows:

[0053] In actual use, the tire is placed on the placement platform 11, and then the sidewall of the tire is clamped and positioned by the positioning component 2. During this process, the limiting member 4 is released from the restriction on the position of the abutment part 13 on the mounting part 12. Then, under the action of the first elastic member 3, the abutment part 13 moves towards each other, thereby abutting the tire tread and positioning the tire in a direction perpendicular to the tire axis. By positioning the tire in two mutually perpendicular directions through the positioning component 2 and the abutment part 13, the positioning effect of the car tire can be effectively improved, thereby ensuring that the tire axis matches the tire positioning axis, simplifying the tire positioning operation and improving the efficiency of tire positioning.

[0054] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A tire replacement device for automobile repair, comprising a frame (1), a placement platform (11) disposed on the frame (1), and a positioning component (2) disposed on the placement platform (11), characterized in that: Mounting parts (12) are fixedly provided on both sides of the mounting platform (11). Each mounting part (12) is provided with an abutment part (13). The abutment part (13) is used to abut against the tread of the tire. The abutment part (13) and the mounting part (12) are slidably connected. A first elastic member (3) is provided on the mounting part (12). The first elastic member (3) is used to apply force to the abutment part (13) so that the two abutment parts (13) move toward each other. A limiting member (4) is provided on the mounting part (12). The limiting member (4) is used to limit the position of the abutment part (13) on the mounting part (12).

2. A tire changing apparatus for servicing vehicles as defined in claim 1 wherein: A sliding groove (5) is provided at the top of the mounting part (12), and a sliding block (51) is slidably arranged in the sliding groove (5). A mounting groove (52) is provided at the top of the sliding block (51). The abutting part (13) is vertically arranged in the mounting groove (52). The top end of the abutting part (13) extends out of the mounting groove (52) and contacts the tire tread. The abutting part (13) is rotatably connected to the inner wall of the mounting groove (52). A second elastic member (53) is provided on the abutting part (13). The second elastic member (53) acts on the abutting part (13) to keep the abutting part (13) in a vertical state. The limiting member (4) is used to limit the position of the sliding block (51) in the sliding groove (5).

3. A tire changing apparatus for servicing vehicles as defined in claim 2 wherein: The limiting member (4) is set as a limiting pin. A strip hole (6) is opened in the horizontal direction on the side wall of the mounting part (12). The limiting member (4) is slidably disposed in the strip hole (6). A limiting hole (61) for the limiting member (4) to be inserted is opened on the side wall of the sliding block (51). The limiting hole (61) is through. A positioning member (62) is provided on the limiting member (4). The positioning member (62) is used to limit the position of the limiting member (4) in the strip hole (6).

4. A tire changing apparatus for servicing vehicles as defined in claim 3 wherein: The limiting hole (61) is a square hole, and a block (63) is fixedly provided at the end of the limiting member (4). The block (63) is adapted to the square hole. One end of the block (63) located in the mounting groove (52) is set as an inclined surface (64). The inclined surface (64) of the block (63) is slidably connected to the bottom end of the abutment part (13). A third elastic element (65) is provided on the sliding block (51). The third elastic element (65) acts on the limiting member (4) to make the limiting member (4) move toward the sliding groove (5).

5. A tire changing apparatus for servicing vehicles as defined in claim 4 wherein: The positioning element (62) is configured as a positioning gear. The positioning element (62) is coaxially fixedly sleeved on the limiting element (4). A positioning rack (66) is fixedly provided on the inner wall of the strip hole (6) along the length direction of the strip hole (6). The positioning rack (66) meshes with the positioning gear. A pull ring (67) is fixedly provided at the end of the positioning element (62) away from the sliding groove (5).

6. A tire changing apparatus for servicing vehicles as defined in claim 4 wherein: A connecting block (7) is slidably disposed in the strip hole (6) along the length direction of the strip hole (6). A connecting hole (71) is provided on the connecting block (7) along the axial direction of the limiting member (4). The limiting member (4) is slidably disposed in the connecting hole (71). An installation hole (72) is provided inside the connecting block (7) along the axial direction of the connecting hole (71). The diameter of the installation hole (72) is larger than the diameter of the connecting hole (71). The installation hole (72) is connected to the connecting hole (71). An installation ring (73) is coaxially fixedly sleeved on the limiting member (4). The installation ring (73) is slidably disposed in the installation hole (72). The third elastic member (65) is set as a compression spring. The third elastic member (65) is sleeved on the limiting member (4). One end of the third elastic member (65) abuts against the installation ring (73), and the other end abuts against the inner wall of the installation hole (72).

7. A tire changing apparatus for servicing vehicles as defined in claim 2 wherein: The first elastic element (3) is configured as a tension spring. The first elastic element (3) is located in the sliding groove (5). One end of the first elastic element (3) is fixedly connected to the inner wall of the sliding groove (5), and the other end is fixedly connected to the side wall of the sliding block (51).

8. A tire changing apparatus for servicing vehicles as defined in claim 2 wherein: A rotating hole (54) is provided on the side wall of the mounting groove (52), and a rotating rod (55) is fixedly provided on the side wall of the abutment part (13). The rotating rod (55) is rotatably disposed in the rotating hole (54). The second elastic element (53) is a torsion spring. The second elastic element (53) is sleeved on the rotating rod (55). One end of the second elastic element (53) is fixedly connected to the rotating rod (55), and the other end is fixedly connected to the inner wall of the rotating hole (54).

9. A tire changing apparatus for servicing vehicles as claimed in any one of claims 1 to 8, wherein: An abutment roller (8) is rotatably provided on the top of the abutment portion (13), the abutment roller (8) being used to make rolling contact with the tire tread.

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