Tool for welding saddle tube and connecting assembly of electric bicycle

Abstract

The utility model discloses a tool for welding a saddle tube and a connecting assembly of an electric bicycle. The tool comprises a positioning frame assembly, a first positioning assembly, a second positioning assembly, a third positioning assembly and a fourth positioning assembly. The positioning frame assembly is used for bearing a cushion mounting part of the cushion tube and a battery mounting part connected with the cushion mounting part; the first positioning assembly is arranged on the positioning frame assembly and is used for positioning the battery fixing plate at a first preset position on the battery mounting part; and the second positioning assembly is arranged on the positioning frame assembly and positions the first connecting pipe at a second preset position on the battery mounting part. The third positioning assembly is arranged on the positioning frame assembly, and the second connecting pipe is positioned at a third preset position of the cushion mounting part. The fourth positioning assembly is arranged on the positioning frame assembly, and the cushion fixing plate is positioned at a fourth preset position of the cushion mounting part. The tool can improve the welding efficiency of welding the cushion pipe and the connecting assembly.

Description

Technical Field

[0001] The embodiments of this utility model relate to the technical field, and more specifically, to a tool for welding the seat tube and connecting components of an electric bicycle. Background Technology

[0002] With social development and the improvement of people's living standards, more and more people are choosing electric bicycles as their mode of transportation. To facilitate carrying passengers, electric bicycles are designed with a seat at the rear. The seat is mounted on the saddle tube of the electric bicycle. To make the electric bicycle more aesthetically pleasing, one end of the saddle tube is usually used to mount the seat, and the other end is used to mount the battery pack. However, in the bicycle manufacturing process, especially in the welding process between the saddle tube and the connecting components (including the battery mounting plate for mounting the battery pack, the saddle mounting plate for mounting the seat, and the first and second connecting tubes for reinforcing the support strength of the saddle tube), the welding operation in the existing technology suffers from low efficiency.

[0003] Specifically, the welding of the seat tube and the connecting assembly typically involves manually positioning the connecting assembly to keep it fixed relative to the seat tube. However, since the connecting assembly includes multiple parts to be welded (i.e., the battery fixing plate, the fixing plate, the first connecting tube, and the second connecting tube), and it is necessary to ensure that the welding area does not shift during the welding process, the connecting assembly needs to be manually positioned multiple times and adjusted for the corresponding angles and positions, resulting in low welding efficiency between the seat tube and the connecting assembly. Utility Model Content

[0004] In order to solve one or more of the technical problems mentioned above, this utility model provides a tool for welding the seat tube and connecting components of an electric bicycle, which can improve the welding efficiency of the seat tube and the connecting components.

[0005] This utility model embodiment provides a tool for welding the seat tube and connecting assembly of an electric bicycle. The connecting assembly includes a battery fixing plate, a first connecting tube, a second connecting tube, and a seat fixing plate mounted on the seat tube. The tool includes:

[0006] A positioning frame assembly for supporting a seat mounting portion of a seat tube and a battery mounting portion of the seat tube connected to the seat mounting portion;

[0007] A first positioning component is disposed on the positioning frame assembly and positions the battery fixing plate at a first preset position on the battery mounting part;

[0008] The second positioning component is disposed on the positioning frame assembly and positions the first connecting tube at a second preset position on the battery mounting part;

[0009] The third positioning component is disposed on the positioning frame assembly and positions the second connecting tube at the third preset position of the seat cushion mounting part;

[0010] The fourth positioning component is disposed on the positioning frame assembly and positions the seat cushion fixing plate at the fourth preset position of the seat cushion mounting part.

[0011] Furthermore, the positioning frame assembly includes a frame having a first region corresponding to the seat cushion mounting portion and a second region corresponding to the battery mounting portion, a limiting block disposed on the first region and a pushing block disposed on the second region. The limiting block has a limiting groove that can limit the bending portion of the seat cushion mounting portion, and the pushing block has a pushing surface that can abut against the opening of the battery mounting portion on the side away from the seat cushion mounting portion. The pushing block can press the bending portion against the groove wall of the limiting groove.

[0012] Furthermore, the limiting groove is a semi-circular groove, and the limiting block is also provided with a limiting protrusion with an arc-shaped surface disposed in the limiting groove, so as to limit the bending part of the seat cushion mounting part between the arc-shaped surface of the limiting protrusion and the groove wall of the limiting groove.

[0013] Furthermore, the positioning frame assembly also includes a plurality of positioning protrusions disposed on the frame and distributed on both sides of the seat cushion tube along the length direction of the seat cushion tube, for positioning the seat cushion tube.

[0014] Furthermore, the tool also includes a pressure-applying component disposed on the frame and capable of applying pressure to the seat cushion mounting portion in the first region, the pressure-applying component comprising:

[0015] A mounting base is provided on the first region of the frame;

[0016] A pressing member, hinged to the fixed base, wherein the pressing head of the pressing member can press against the seat cushion mounting portion; and

[0017] A connecting rod, which is hinged to both the fixed base and the pressing member;

[0018] The connecting rod can be operated to drive the pressing head of the pressing member to press against the seat cushion mounting part and adjust the pressing head of the pressing member to press the seat cushion mounting part tightly.

[0019] Further, the first positioning component includes:

[0020] A first support frame is disposed on the second region of the frame;

[0021] The first positioning block is disposed on the first support frame and has a first bearing inclined surface for bearing the battery fixing plate and an abutting protrusion for abutting against the battery fixing plate.

[0022] Furthermore, the second positioning component includes:

[0023] A second support frame is disposed on the second region of the frame;

[0024] The second positioning block is disposed on the second support frame and has a first positioning groove that can fit against the wall of the first connecting pipe.

[0025] Furthermore, the third positioning component includes a third positioning block disposed in the first region on the frame, and has a second positioning groove thereon that can fit against the wall of the second connecting pipe.

[0026] Furthermore, the third positioning component also includes a positioning pin that is sequentially inserted into the second positioning groove and the first connecting hole of the second connecting tube.

[0027] Furthermore, the fourth positioning component includes a fourth positioning block disposed in the first region on the frame, the fourth positioning block being provided with a second bearing ramp for supporting the seat cushion fixing plate and a positioning post disposed on the second bearing ramp that can pass through the second connecting hole of the seat cushion fixing plate.

[0028] The tool provided in this embodiment uses a positioning frame assembly to position the seat cushion tube, and utilizes a first positioning assembly, a second positioning assembly, a third positioning assembly, and a fourth positioning assembly to position the battery fixing plate, the first connecting tube, the second connecting tube, and the seat cushion fixing plate, enabling them to be positioned in one step. This tool replaces manual positioning; positioning is achieved simply by placing the battery fixing plate, the first connecting tube, the second connecting tube, and the seat cushion fixing plate in the corresponding positioning assembly positions. This reduces the multiple positioning and adjustment steps required by manual positioning of the battery fixing plate, the first connecting tube, the second connecting tube, and the seat cushion fixing plate, thereby reducing the preparation time before welding the seat cushion tube and the connecting assembly, thus improving the welding efficiency of the seat cushion tube and the connecting assembly, and reducing the operator's workload. Furthermore, since the seat cushion tube and the connecting assembly welded by this tool are in the same position, the welding quality of the seat cushion tube and the connecting assembly is also improved. Attached Figure Description

[0029] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0030] Figure 1 This invention provides a schematic diagram of the tool for welding the seat tube and connecting components of an electric bicycle in use, according to an embodiment of the present invention.

[0031] Figure 2 A schematic diagram of the structure of the cushion tube and connecting components involved in the embodiment of this utility model is shown;

[0032] Figure 3 This invention provides a schematic diagram of the structure of the positioning frame assembly, the first positioning assembly, and the second positioning assembly provided in an embodiment of the present invention.

[0033] Figure 4 The diagram shows the structural schematics of the positioning frame assembly, pressure application assembly, third positioning assembly, and fourth positioning assembly provided in the embodiments of this utility model.

[0034] In the picture:

[0035] 1. Positioning frame assembly; 11. Frame body; 111. First area; 112. Second area; 12. Limiting block; 121. Limiting groove; 13. Pushing block; 131. Pushing surface; 14. Limiting protrusion; 15. Positioning protrusion;

[0036] 2. Pressure application component; 21. Fixing base; 22. Pressing element; 23. Connecting rod;

[0037] 3. First positioning component; 31. First support frame; 32. First positioning block; 321. First bearing inclined surface; 322. Abutment protrusion;

[0038] 4. Second positioning component; 41. Second support frame; 42. Second positioning block; 421. First positioning groove;

[0039] 5. Third positioning component; 51. Third positioning block; 511. Second positioning groove; 52. Positioning pin;

[0040] 6. Fourth positioning component; 61. Fourth positioning block; 611. Second bearing inclined surface; 612. Positioning post;

[0041] 100. Connecting component; 101. Battery mounting plate; 102. First connecting tube; 103. Second connecting tube; 104. Seat cushion mounting plate; 200. Seat cushion tube; 201. Seat cushion mounting part; 202. Battery mounting part. Detailed Implementation

[0042] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0043] Figure 1 This diagram shows a schematic representation of the tool provided in this embodiment for welding the seat tube 200 and connecting assembly 100 of an electric bicycle in use. Figure 2 A schematic diagram of the seat cushion tube 200 and connecting assembly 100 involved in this embodiment is shown. Figure 1 and Figure 2 As shown, this embodiment provides a tool for welding a seat tube 200 and a connecting assembly 100 of an electric bicycle. The connecting assembly 100 includes a battery fixing plate 101, a first connecting tube 102, a second connecting tube 103, and a seat fixing plate 104 mounted on the seat tube 200. The tool includes a positioning frame assembly 1, a first positioning assembly 3, a second positioning assembly 4, a third positioning assembly 5, and a fourth positioning assembly 6. The positioning frame assembly 1 supports the seat mounting portion 201 of the seat tube 200 and the battery mounting portion 202 of the seat tube 200 connected to the seat mounting portion 201. The first positioning assembly 3 is disposed on the positioning frame assembly 1 and positions the battery fixing plate 101 at a first preset position on the battery mounting portion 202. The second positioning assembly 4 is disposed on the positioning frame assembly 1 and positions the first connecting tube 102 at a second preset position on the battery mounting portion 202. The third positioning assembly 5 is disposed on the positioning frame assembly 1 and positions the second connecting tube 103 at a third preset position on the seat mounting portion 201. The fourth positioning component 6 is disposed on the positioning frame component 1 and positions the seat cushion fixing plate 104 at the fourth preset position of the seat cushion mounting part 201.

[0044] When using this tool, first place the seat tube 200 on the positioning frame assembly 1 to accurately position the seat tube 200. Then, place the battery fixing plate 101, the first connecting tube 102, the second connecting tube 103, and the seat fixing plate 104 of the connecting assembly 100 on the corresponding first positioning assembly 3, the second positioning assembly 4, the third positioning assembly 5, and the fourth positioning assembly 6 to hold the battery fixing plate 101, the first connecting tube 102, the second connecting tube 103, and the seat fixing plate 104 in the corresponding first preset position, second preset position, third preset position, and fourth preset position. Then, weld the seat tube 200 and the connecting assembly 100 by welding equipment or by manual means.

[0045] The tool provided in this embodiment uses the positioning frame assembly 1 to position the seat cushion tube 200, and uses the first positioning assembly 3, the second positioning assembly 4, the third positioning assembly 5 and the fourth positioning assembly 6 to position the battery fixing plate 101, the first connecting tube 102, the second connecting tube 103 and the seat cushion fixing plate 104, so that the battery fixing plate 101, the first connecting tube 102, the second connecting tube 103 and the seat cushion fixing plate 104 can be positioned in one go. This tool replaces manual positioning. Positioning is achieved simply by placing the battery fixing plate 101, first connecting pipe 102, second connecting pipe 103, and seat cushion fixing plate 104 in their respective positions on the positioning components. This reduces the multiple positioning adjustments required by manual intervention, thereby reducing preparation time before welding the seat cushion tube 200 to the connecting component 100. This improves welding efficiency and reduces operator workload. Furthermore, the tool ensures that the seat cushion tube 200 and connecting component 100 are welded in the same position, thus improving welding quality.

[0046] It should be noted that, in this embodiment, the first preset position is the installation position on the battery mounting part 202 corresponding to the battery pack mounting point; the second preset position is the position where the first connecting pipe 102 can provide optimal support for the battery mounting part 202; the third preset position is the position where the second connecting pipe 103 can provide optimal support for the seat cushion mounting part 201; and the fourth preset position is the installation position on the seat cushion mounting part 201 corresponding to the seat cushion mounting point. In other embodiments, the first, second, third, and fourth preset positions can be any position on the wall of the seat cushion tube 200 and can be adjusted according to actual needs. The first connecting pipe 102 and the second connecting pipe 103 are cylindrical tubes that improve the support strength of the seat cushion tube 200.

[0047] Figure 3 This diagram shows the structure of the positioning frame assembly 1, the first positioning assembly 3, and the second positioning assembly 4 provided in this embodiment. Figure 4 A schematic diagram of the positioning frame assembly 1, pressure application assembly 2, third positioning assembly 5, and fourth positioning assembly 6 provided in this embodiment is shown. Figure 3 and Figure 4 and combined Figure 1 and Figure 2As shown, the positioning frame assembly 1 includes a frame 11 having a first region 111 corresponding to the seat cushion mounting part 201 and a second region 112 corresponding to the battery mounting part 202, a limiting block 12 provided on the first region 111 and a pushing block 13 provided on the second region 112. The limiting block 12 has a limiting groove 121 that can limit the bending part of the seat cushion mounting part 201. The pushing block 13 has a pushing surface 131 that can abut against the tube opening of the battery mounting part 202 away from the seat cushion mounting part. The pushing block 13 can press the bending part against the groove wall of the limiting groove 121 so that the seat cushion tube 200 is firmly positioned on the frame 11 to prevent the seat cushion tube 200 from shifting during the installation of the connecting assembly 100. The pushing block 13 and the limiting groove 121 also make it convenient for the operator to pick up and put down the seat cushion tube 200.

[0048] Preferably, the limiting groove 121 is a semi-circular groove, and the limiting block 12 is also provided with a limiting protrusion 14 with an arc-shaped surface disposed in the limiting groove 121, so as to limit the bending part of the cushion mounting part 201 between the arc-shaped surface of the limiting protrusion 14 and the groove wall of the limiting groove 121. When the cushion mounting part 201 of the cushion tube 200 is installed, the limiting protrusion 14 and the limiting groove 121 limit the bending part of the cushion mounting part 201 between the limiting protrusion 14 and the limiting groove 121 to play a positioning role. The semi-circular groove can reduce the slotting area on the frame 11 while playing an effective limiting role, thereby reducing the processing difficulty of the frame 11.

[0049] The limiting groove 121 and the pushing block 13 can effectively limit the length of the seat tube 200. However, since the seat tube 200 is a slender piece formed by connecting multiple tube segments, it is easy to bend. Therefore, the positioning frame assembly 1 also includes multiple positioning protrusions 15 on the frame 11 and distributed on both sides of the seat tube 200 along the length of the seat tube 200 to position the seat tube 200, thereby ensuring that the entire seat tube 200 can be effectively positioned and preventing the seat tube 200 from bending or bending locally due to its excessive length.

[0050] Furthermore, the tool also includes a pressure-applying component 2 mounted on the frame 11 and capable of applying pressure to the seat cushion mounting portion 201 on the first region 111. The pressure-applying component 2 includes a fixed base 21, a pressing member 22, and a connecting rod 23. The fixed base 21 is mounted on the first region 111 of the frame 11. The pressing member 22 is hinged to the fixed base 21, and the pressing head of the pressing member 22 can press against the seat cushion mounting portion 201. The connecting rod 23 is hinged to both the fixed base 21 and the pressing member 22. Operating the connecting rod 23 can cause the pressing head of the pressing member 22 to press against the seat cushion mounting portion 201 and can adjust the pressing head of the pressing member 22 to press the seat cushion mounting portion 201 firmly, thereby fixing the seat cushion tube 200 to the frame 11 and preventing the seat cushion tube 200 from shaking during welding with the connecting component 100, which would affect the welding quality of the seat cushion tube 200 with the connecting component 100.

[0051] Furthermore, the first positioning component 3 includes a first support frame 31 and a first positioning block 32. The first support frame 31 is disposed on the second region 112 of the frame 11. The first positioning block 32 is disposed on the first support frame 31, and is provided with a first bearing inclined surface 321 for bearing the battery fixing plate 101 and an abutment protrusion 322 for abutting against the battery fixing plate 101. The first bearing inclined surface 321 can restrict the battery fixing plate 101 placed thereon to be in an inclined state to adapt to the battery fixing part of the seat tube 200. The abutment protrusion 322 abuts against the battery fixing plate 101 and uses the weight of the battery fixing plate 101 itself to keep the battery fixing plate 101 in an inclined state throughout the welding process with the seat tube 200.

[0052] Furthermore, the second positioning component 4 includes a second support frame 41 and a second positioning block 42. The second support frame 41 is disposed on the second region 112 of the frame 11. The second positioning block 42 is disposed on the second support frame 41 and has a first positioning groove 421 that can fit against the wall of the first connecting pipe 102. After the first connecting pipe 102 is placed in the first positioning groove 421, it remains in a fitted state with the groove wall of the first positioning groove 421, so that the first connecting pipe 102 is held in a fixed state and welded to the cushion tube 200. The first positioning groove 421 also facilitates the operator to pick up and put down the first connecting pipe 102.

[0053] Furthermore, the third positioning component 5 includes a third positioning block 51 disposed in the first region 111 on the frame 11, and there is a second positioning groove 511 thereon that can fit against the wall of the second connecting pipe 103. After the second connecting pipe 103 is placed in the second positioning groove 511, it remains in a fitted state with the groove wall of the second positioning groove 511, so that the second connecting pipe 103 is held in a fixed state and welded to the cushion tube 200. The second positioning groove 511 also makes it easy for the operator to pick up and put down the second connecting pipe 103.

[0054] Since the second connecting pipe 103 is an important supporting component for the seat mounting part 201 of the seat cushion tube 200, the third positioning assembly 5 also includes a positioning pin 52 that passes through the second positioning groove 511 and the first connecting hole of the second connecting pipe 103 in sequence. The positioning pin 52 passes through the first connecting hole of the second connecting pipe 103 to correct the second connecting pipe 103, so that the two ends of the second connecting pipe 103 are kept in close contact with the pipe wall of the seat cushion tube 200 for welding, thereby improving the welding quality between the second connecting pipe 103 and the seat cushion tube 200.

[0055] Furthermore, the fourth positioning component 6 includes a fourth positioning block 61 located in the first region 111 on the frame 11. The fourth positioning block 61 is provided with a second bearing inclined surface 611 for supporting the seat cushion fixing plate 104 and a positioning post 612 located on the second bearing inclined surface 611 that can pass through the second connecting hole of the seat cushion fixing plate 104. The second bearing inclined surface 611 can restrict the seat cushion fixing plate 104 placed thereon to an inclined state to adapt to the seat cushion fixing part of the seat cushion tube 200. The positioning post 612 passes through the original second connecting hole of the seat cushion fixing plate 104 for installing the seat cushion to position the seat cushion fixing plate 104, so that the seat cushion fixing plate 104 is always kept in an inclined state during the welding process with the seat cushion tube 200.

[0056] In the foregoing description of this application, unless otherwise expressly specified and limited, the terms "fixed," "installed," "connected," or "linked" should be interpreted broadly. For example, the term "linked" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can refer to the internal communication of two components or the interaction between two components. Therefore, unless otherwise expressly limited in this application, those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0057] Based on the above description of this application, those skilled in the art will also understand that the terms used, such as "upper," "length," and "inner," which indicate orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings of this application. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as a limitation on the present invention.

[0058] Furthermore, the terms "first" or "second," etc., used in this application to refer to numbers or ordinal numbers are for descriptive purposes only and should not be construed as explicitly or implicitly indicating relative importance or specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, or more, unless otherwise explicitly specified.

[0059] While various embodiments of the present invention have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and intent of the present invention. It should be understood that various alternatives to the embodiments of the present invention described herein may be employed in the practice of the present invention. The appended claims are intended to define the scope of protection of the present invention and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A tool for welding a seat tube and a connecting assembly for an electric bicycle, the connecting assembly comprising a battery fixing plate, a first connecting tube, a second connecting tube, and a seat fixing plate mounted on the seat tube, characterized in that, The tools include: A positioning frame assembly for supporting the seat cushion mounting portion of the seat cushion tube and the battery mounting portion of the seat cushion tube connected to the seat cushion mounting portion; A first positioning component is disposed on the positioning frame assembly and positions the battery fixing plate at a first preset position on the battery mounting part; The second positioning component is disposed on the positioning frame assembly and positions the first connecting tube at a second preset position on the battery mounting part; The third positioning component is disposed on the positioning frame component and positions the second connecting tube at the third preset position of the seat cushion mounting part; The fourth positioning component is disposed on the positioning frame assembly and positions the seat cushion fixing plate at the fourth preset position of the seat cushion mounting part.

2. The tool according to claim 1, characterized in that, The positioning frame assembly includes a frame having a first region corresponding to the seat cushion mounting portion and a second region corresponding to the battery mounting portion, a limiting block disposed on the first region and a pushing block disposed on the second region. The limiting block has a limiting groove that can limit the bending part of the seat cushion mounting portion, and the pushing block has a pushing surface that can abut against the opening of the battery mounting portion on the side away from the seat cushion mounting portion. The pushing block can press the bending part against the groove wall of the limiting groove.

3. The tool according to claim 2, characterized in that, The limiting groove is a semi-circular groove, and the limiting block is also provided with a limiting protrusion with an arc-shaped surface disposed in the limiting groove, so as to limit the bending part of the seat cushion mounting part between the arc-shaped surface of the limiting protrusion and the groove wall of the limiting groove.

4. The tool according to claim 2, characterized in that, The positioning frame assembly also includes a plurality of positioning protrusions disposed on the frame and distributed on both sides of the seat tube along the length of the seat tube, for positioning the seat tube.

5. The tool according to claim 2, characterized in that, The tool further includes a pressure-applying component disposed on the frame and capable of applying pressure to the seat cushion mounting portion in the first region, the pressure-applying component comprising: A mounting base is provided on the first region of the frame; A pressing member, hinged to the fixed base, wherein the pressing head of the pressing member can press against the seat cushion mounting portion; and A connecting rod, which is hinged to both the fixed base and the pressing member; The connecting rod can be operated to drive the pressing head of the pressing member to press against the seat cushion mounting part and adjust the pressing head of the pressing member to press the seat cushion mounting part tightly.

6. The tool according to claim 2, characterized in that, The first positioning component includes: A first support frame is disposed on the second region of the frame; The first positioning block is disposed on the first support frame and has a first bearing inclined surface for bearing the battery fixing plate and an abutting protrusion for abutting against the battery fixing plate.

7. The tool according to claim 2, characterized in that, The second positioning component includes: A second support frame is disposed on the second region of the frame; The second positioning block is disposed on the second support frame and has a first positioning groove that can fit against the wall of the first connecting pipe.

8. The tool according to claim 2, characterized in that, The third positioning component includes a third positioning block disposed in the first area on the frame, and has a second positioning groove that can fit against the wall of the second connecting pipe.

9. The tool according to claim 8, characterized in that, The third positioning component also includes a positioning pin that is sequentially inserted into the second positioning groove and the first connecting hole of the second connecting tube.

10. The tool according to claim 2, characterized in that, The fourth positioning component includes a fourth positioning block disposed in the first area on the frame. The fourth positioning block is provided with a second bearing slope for supporting the seat cushion fixing plate and a positioning post disposed on the second bearing slope that can pass through the second connecting hole of the seat cushion fixing plate.

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