Cab welding tool

Abstract

The embodiment of the utility model provides a cab welding tool, and relates to the technical field of tools of vehicle parts. The cab welding tool comprises a base, an upper supporting seat, a lower supporting seat and a connecting supporting seat. The upper supporting seat is connected with the base, an upper supporting face is arranged on the side, away from the base, of the upper supporting seat and used for supporting the upper underframe, a lower supporting face is arranged on the side, away from the base, of the lower supporting seat and used for supporting the lower underframe, the connecting supporting seat is provided with a connecting supporting face, the connecting frame is provided with an abutting face, and the connecting supporting face is matched with the abutting face. The connecting supporting face is used for abutting against the abutting face. When the cab welding tool and the bottom framework are assembled, the lower chassis of the bottom framework is taken as a reference, the cab welding tool and the bottom framework are pre-assembled on the lower supporting surface to finish preliminary positioning, and after the connecting supporting surface of the connecting supporting seat is propped against the propping surface, the accurate assembly of the cab welding tool and the bottom framework can be ensured; therefore, the accuracy of the appearance and the framework size of the manufactured cab framework is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling for vehicle parts, in particular to a cab welding tooling. Background Art

[0002] At present, when the cab of the vehicle is in the trial production stage, because the production quantity is small, it is not necessary to invest a lot of manpower and material resources, but the product manufacturing quality must be guaranteed. Therefore, it is necessary to provide a cab welding tool that can not only meet the use requirements but also reduce the production cost. When welding the cab frame, the bottom frame of the cab frame needs to be placed on the welding tool, and then the side door pillars and the top frame are welded to the second frame to complete the welding of the cab frame.

[0003] The inventor has found through research that when welding some existing cab frames, the bottom frames cannot be placed stably, thereby affecting the shape and frame size of the cab frame welding. Utility Model Content

[0004] The utility model aims to provide a cab welding tool, which can improve the accuracy of the shape and size of the cab frame.

[0005] The embodiment of the utility model is achieved as follows:

[0006] In a first aspect, the utility model provides a cab welding tool for fixing a cab frame, wherein the cab frame comprises a bottom frame, the bottom frame comprises an upper chassis, a connecting frame and a lower chassis, the upper chassis is connected to the connecting frame, the lower chassis is connected to the connecting frame, the lower chassis and the upper chassis are arranged at intervals in a height direction and the height of the lower chassis is lower than that of the upper chassis, the orthographic projection of the lower chassis in the height direction and the orthographic projection of the upper chassis in the height direction are arranged at intervals along a first direction, the first direction is perpendicular to the height direction, the lower chassis is parallel to the upper chassis, and the cab welding tool comprises:

[0007] Base;

[0008] An upper support seat, the upper support seat is connected to the base, and a side of the upper support seat away from the base has an upper support surface, and the upper support surface is used to support the upper chassis;

[0009] A lower support seat, the lower support seat is connected to the base, and a side of the lower support seat away from the base has a lower support surface, and the lower support surface is used to support the lower chassis;

[0010] A connecting support seat; the connecting support seat is connected to the base, the connecting support seat has a connecting support surface, the connecting frame has an abutting surface, the connecting support surface is adapted to the abutting surface, and the connecting support surface is used to abut the abutting surface.

[0011] In an optional embodiment, the cab welding tooling also includes a first limiting portion, which is connected to the base, and the height of one end of the first limiting portion away from the base is higher than the height of the upper support seat, and the first limiting portion is used to abut against a side of the upper frame away from the lower frame, and the first limiting portion is used to limit the movement of the upper frame in the first direction.

[0012] In an optional embodiment, the first limiting portion and the upper support seat are arranged in the first direction and are located on a side of the upper support seat away from the lower support seat.

[0013] In an optional embodiment, the number of the connecting support seats is two and the two connecting support seats are arranged at intervals along the second direction, and the first direction, the second direction and the height direction are perpendicular to each other;

[0014] There are two connecting frames arranged at intervals along the second direction, each connecting frame is placed on the connecting support seat, and two sides of the lower base frame are respectively connected to the two connecting frames.

[0015] In an optional embodiment, the cab welding tool further includes a second limiting portion, and the second limiting portion is connected to the base;

[0016] The second limiting portion is used to abut against the connecting frame to limit the movement of the connecting frame in the second direction, and / or the second limiting portion is used to abut against the lower base frame to limit the movement of the lower base frame in the first direction.

[0017] In an optional embodiment, there are two second limiting portions, and the two second limiting portions are arranged at intervals along the second direction. When the bottom frame is placed on the cab welding tooling, the two second limiting portions are located between the two connecting frames, and each second limiting portion is used to abut against the connecting frame and the lower frame at the same time.

[0018] In an optional embodiment, the lower frame includes a cross beam and a longitudinal beam, the two ends of the cross beam are respectively connected to two connecting frames, the longitudinal beam is connected to the cross beam and extends along the first direction, and the base is also provided with a third limiting portion, which extends along the height direction. The third limiting portion is used to abut against the longitudinal beam to limit the movement of the lower frame in the second direction.

[0019] In an optional embodiment, there are multiple longitudinal beams and they are spaced apart from the cross beams along the second direction, there are multiple third limiting portions and they are spaced apart along the second direction, and when the bottom frame is placed on the cab welding tooling, there is a third limiting portion between any two adjacent longitudinal beams, and the third limiting portion abuts against the longitudinal beams.

[0020] In an optional embodiment, the cab welding tool further includes a connecting support portion disposed on the base, the connecting support portion being located between the upper support seat and the lower support seat;

[0021] The bottom frame also includes a connecting pipe, which extends in the height direction. Both ends of the connecting pipe are respectively connected to the upper bottom frame and the lower bottom frame. The connecting pipe is used to abut against the connecting support part.

[0022] In an optional embodiment, the cab welding tool further includes a tool clamp, and the tool clamp is used to clamp the bottom frame and the cab welding tool.

[0023] The beneficial effect of the embodiment of the utility model is as follows: the embodiment of the utility model provides a cab welding tool including a base, an upper support seat, a lower support seat and a connecting support seat. The upper support seat is connected to the base, and the side of the upper support seat away from the base has an upper support surface, and the upper support surface is used to support the upper chassis, the lower support seat is connected to the base, and the side of the lower support seat away from the base has a lower support surface, and the lower support surface is used to support the lower chassis, the connecting support seat is connected to the base, the connecting support seat has a connecting support surface, and the connecting frame has an abutting surface, and the connecting support surface is adapted to the abutting surface, and the connecting support surface is used to abut the abutting surface. The height of the lower support surface is lower than the height of the upper support surface. Therefore, when assembling the cab welding tool and the bottom frame, the lower chassis of the bottom frame is used as a reference, and the lower support surface is pre-assembled on the lower support surface to complete the preliminary positioning. After the connecting support surface of the connecting support seat is abutted with the abutting surface, the accurate assembly of the cab welding tool and the cab frame can be ensured, and the bottom frame can be ensured to be in a stable state, thereby improving the accuracy of the shape and frame size of the cab frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the assembly of the cab welding tool and the cab frame provided in an embodiment of the utility model;

[0026] Figure 2 A schematic diagram of the assembly of the cab welding tooling and the bottom frame provided in the embodiment of the utility model;

[0027] Figure 3 An exploded schematic diagram of the cab welding tooling and the bottom frame provided in an embodiment of the utility model.

[0028] Icons: 1-cab welding tooling; 100-base; 200-upper support seat; 201-upper support surface; 300-lower support seat; 301-lower support surface; 310-crossbeam; 320-longitudinal beam; 400-connecting support seat; 401-connecting support surface; 101-first limiting part; 102-second limiting part; 103-third limiting part; 104-connecting support part; 500-tooling fixture; 2-cab frame; 2100-bottom frame; 2110-upper frame; 2120-lower frame; 2130-connecting frame; 2131-butt surface; 2140-connecting pipe; 2200-side door pillar; 2300-top frame. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0033] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] The specific structure of a cab welding tooling provided by an embodiment of the utility model and the corresponding technical effects it brings are described in detail below in conjunction with the patent drawings.

[0036] It should be noted that, in this embodiment, the height direction refers to the height direction of the bottom frame 2100 and the cab welding tool 1 when they are upright, that is, Figure 1 In the height direction, Figure 1 For reference, the first direction is direction a, the second direction is direction b, and the height direction is direction c. The first direction, the second direction, and the height direction are perpendicular to each other.

[0037] Please refer to Figure 1-Figure 3 A cab welding tool 1 provided in an embodiment of the utility model is used to fix a cab frame 2.

[0038] The cab frame 2 includes a bottom frame 2100, a top frame 2300 and two side door pillars 2200 arranged at intervals along the width direction of the bottom frame 2100. The top frame 2300 is arranged at one end of the side door pillar 2200 away from the bottom frame 2100. That is to say, the bottom frame 2100 and the top frame 2300 are respectively arranged at the two ends of the two side door pillars 2200.

[0039] It can be understood that, during the assembly of the cab welding tool 1 and the cab frame 2 , it is necessary to ensure that the bottom frame 2100 is accurately assembled on the cab welding tool 1 , so as to ensure the basic external structure of the cab frame 2 .

[0040] Among them, the bottom frame 2100 includes an upper base frame 2110, a connecting frame 2130 and a lower base frame 2120, the upper base frame 2110 is connected to the connecting frame 2130, the lower base frame 2120 is connected to the connecting frame 2130, the lower base frame 2120 and the upper base frame 2110 are arranged at intervals in the height direction and the height of the lower base frame 2120 is lower than the height of the upper base frame 2110, the orthographic projection of the lower base frame 2120 in the height direction and the orthographic projection of the upper base frame 2110 in the height direction are arranged at intervals along a first direction, and the first direction is perpendicular to the height direction.

[0041] The cab welding tool 1 includes a base 100 , an upper support seat 200 , a lower support seat 300 and a connecting support seat 400 .

[0042] The upper support seat 200 is connected to the base 100 , and the side of the upper support seat 200 away from the base 100 has an upper support surface 201 , and the upper support surface 201 is used to support the upper chassis 2110 , that is, when the bottom frame 2100 is assembled on the cab welding tooling 1 , the upper chassis 2110 will be placed on the upper support surface 201 .

[0043] The lower support seat 300 is connected to the base 100 , and the side of the lower support seat 300 away from the base 100 has a lower support surface 301 , and the lower support surface 301 is used to support the lower frame 2120 . It can be understood that when the bottom frame 2100 is assembled on the cab welding tooling 1 , the lower frame 2120 will be placed on the lower support surface 301 .

[0044] The height of the lower support surface 301 is lower than that of the upper support surface 201 . Therefore, when assembling the cab welding tooling 1 and the cab frame 2 , the lower frame 2120 of the bottom frame 2100 is used as a reference to pre-assemble it on the lower support surface 301 to complete preliminary positioning.

[0045] The connecting support seat 400 is connected to the base 100 , and the connecting support seat 400 has a connecting support surface 401 . The connecting frame 2130 has a contact surface 2131 . The connecting support surface 401 is matched with the contact surface 2131 , and the connecting support surface 401 is used to contact the contact surface 2131 .

[0046] That is to say, the shapes of the connecting support surface 401 and the abutting surface 2131 are adapted to each other. When assembling the cab welding tooling 1 and the bottom frame 2100, by abutting the connecting support surface 401 of the connecting support seat 400 with the abutting surface 2131, the cab welding tooling 1 and the cab frame 2 can be accurately assembled, and the bottom frame 2100 can be kept in a stable state, thereby ensuring that the cab frame 2 is in the welding process, and improving the accuracy of the shape and frame size of the cab frame 2.

[0047] It should be noted that, in this embodiment, there are two connecting support seats 400 and the two connecting support seats 400 are arranged at intervals along the second direction, and the first direction, the second direction and the height direction are perpendicular to each other. There are also two connecting frames 2130 and they are arranged at intervals along the second direction, each connecting frame 2130 is placed on the connecting support seat 400, and the two sides of the lower chassis 2120 are respectively connected to the two connecting frames 2130, so as to ensure that the cab welding tool 1 can stably support the bottom frame 2100 of the cab frame 2.

[0048] It should be noted that the second direction can be understood as the width direction of the cab welding tool 1 and the cab frame 2 , and the first direction can be understood as the length direction of the cab welding tool 1 and the cab frame 2 .

[0049] The cab welding tooling 1 also includes a first limiting portion 101, which is connected to the base 100. The height of one end of the first limiting portion 101 away from the base 100 is higher than the height of the upper base 100. The first limiting portion 101 is used to abut against the side of the upper base frame 2110 away from the lower base frame 2120. The first limiting portion 101 is used to limit the movement of the upper base frame 2110 in the first direction. It can be understood that when the bottom frame 2100 is assembled on the cab welding tooling 1, the first limiting portion 101 abuts against the upper base frame 2110, which can play a pre-positioning effect, thereby ensuring that the bottom frame 2100 and the cab welding tooling 1 are assembled in place in time, and also improving the assembly accuracy of the bottom frame 2100 and the cab welding tooling 1.

[0050] Optionally, the first limiting portion 101 and the upper support seat 200 are arranged in the first direction and are located on a side of the upper support seat 200 away from the lower support seat 300 , that is, the first limiting portion 101 can limit the upper base frame 2110 from moving in a direction away from the lower base frame 2120 .

[0051] Optionally, the cab welding tool 1 also includes a second limiting portion 102, which is connected to the base 100, and is used to abut against the connecting frame 2130 to limit the movement of the connecting frame 2130 along the second direction. In detail, the second limiting portion 102 is also used to abut against the lower frame 2120 to limit the movement of the lower frame 2120 in the first direction.

[0052] In detail, the lower base frame 2120 includes a connected cross beam 310 and a longitudinal beam 320. The two sides of the cross beam 310 are respectively connected to two connecting frames 2130. The longitudinal beam 320 extends along the first direction and is connected to the cross beam 310. It can be understood that the lower support surface 301 can be understood as a side of the cross beam 310 away from the base 100 and a side of the longitudinal beam 320 away from the base 100.

[0053] That is, when the bottom frame 2100 is assembled on the cab welding tool 1, the second limit portion 102 abuts against the connecting frame 2130 and the lower bottom frame 2120 at the same time, and the second limit portion 102 is located on one side of the connecting frame 2130 in the second direction, thereby limiting the movement of the connecting frame 2130 in the second direction. The second limit portion 102 is also located on one side of the cross beam 310 in the first direction, thereby limiting the movement of the lower bottom frame 2120 in the first direction.

[0054] Optionally, there are two second limiting portions 102, and the two second limiting portions 102 are arranged at intervals along the second direction. When the bottom frame 2100 is placed on the cab welding tooling 1, the two second limiting portions 102 are located between the two connecting frames 2130, and each second limiting portion 102 is used to abut against the connecting frame 2130 and the lower frame 2120 at the same time, that is, each second limiting portion 102 abuts against the inner side of the connecting frame 2130 and the cross beam 310 at the same time.

[0055] It can be understood that the two second limiting portions 102 can further improve the assembly accuracy of the bottom frame 2100 and the cab welding tooling 1.

[0056] Optionally, the base 100 is further provided with a third limiting portion 103. In detail, the third limiting portion 103 extends along the height direction, and the third limiting portion 103 is used to abut against the longitudinal beam 320 to limit the movement of the lower base frame 2120 in the second direction.

[0057] Optionally, there are multiple longitudinal beams 320 and they are spaced apart on the cross beam 310 along the second direction, and there are multiple third limiting portions 103 and they are spaced apart along the second direction. When the bottom frame 2100 is placed on the cab welding tooling 1, there is a third limiting portion 103 between any two adjacent longitudinal beams 320, and one third limiting portion 103 abuts against one longitudinal beam 320.

[0058] Optionally, the cab welding tool 1 also includes a connecting support portion 104 arranged on the base 100, and the connecting support portion 104 is located between the upper support seat 200 and the lower support seat 300. The bottom frame 2100 also includes a connecting pipe 2140, and the connecting pipe 2140 extends along the height direction. The two ends of the connecting pipe 2140 are respectively connected to the upper base frame 2110 and the lower base frame 2120. The connecting pipe 2140 is used to abut against the connecting support portion 104. That is, when the bottom frame 2100 is placed on the cab welding tool 1, the connecting pipe 2140 abuts against the connecting support portion 104.

[0059] It can be understood that the third limiting portion 103 can further improve the assembly accuracy of the bottom frame 2100 and the cab welding tooling 1.

[0060] Optionally, in order to further improve the assembly strength between the cab welding tool 1 and the bottom frame 2100 , the cab welding tool 1 further includes a tool fixture 500 , and the tool fixture 500 is used to clamp the bottom frame 2100 and the cab welding tool 1 .

[0061] For example, the tooling fixture 500 can clamp the second limiting portion 102 and the connecting frame 2130, clamp the lower support seat 300 and the lower base frame 2120, clamp the connecting tube 2140 and the connecting support portion 104, clamp the upper support seat 200 and the upper base frame 2110, clamp the connecting frame 2130 and the connecting support seat 400, etc.

[0062] In summary, the embodiment of the utility model provides a cab welding tool 1 including a base 100, an upper support seat 200, a lower support seat 300 and a connecting support seat 400. The upper support seat 200 is connected to the base 100, and the side of the upper support seat 200 away from the base 100 has an upper support surface 201, and the upper support surface 201 is used to support the upper chassis 2110, the lower support seat 300 is connected to the base 100, and the side of the lower support seat 300 away from the base 100 has a lower support surface 301, and the lower support surface 301 is used to support the lower chassis 2120, the connecting support seat 400 is connected to the base 100, and the connecting support seat 400 has a connecting support surface 401, and the connecting frame 2130 has a butting surface 2131, and the connecting support surface 401 is adapted to the butting surface 2131, and the connecting support surface 401 is used to butt against the butting surface 2131. The height of the lower support surface 301 is lower than that of the upper support surface 201. Therefore, when assembling the cab welding tooling 1 and the bottom frame 2100, the lower frame 2120 of the bottom frame 2100 is used as a reference to pre-assemble it on the lower support surface 301 to complete the initial positioning. By abutting the connecting support surface 401 of the connecting support seat 400 with the abutting surface 2131, the cab welding tooling 1 and the cab frame 2 can be accurately assembled, and the bottom frame 2100 can be kept in a stable state, thereby ensuring that the cab frame 2 is in the welding process, thereby improving the accuracy of the shape and frame size of the cab frame 2.

[0063] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A cab welding tool, used for fixing a cab frame, the cab frame comprises a bottom frame, the bottom frame comprises an upper frame, a connecting frame and a lower frame, the upper frame is connected to the connecting frame, the lower frame is connected to the connecting frame, the lower frame and the upper frame are arranged at intervals in the height direction and the height of the lower frame is lower than the height of the upper frame, the orthographic projection of the lower frame in the height direction and the orthographic projection of the upper frame in the height direction are arranged at intervals along a first direction, the first direction is perpendicular to the height direction, the lower frame is parallel to the upper frame, and is characterized in that: Cab welding tooling includes: Base; An upper support seat, the upper support seat is connected to the base, and the side of the upper support seat away from the base has an upper support surface, and the upper support surface is used to support the upper chassis; A lower support seat, the lower support seat is connected to the base, and the lower support seat has a lower support surface on a side away from the base, and the lower support surface is used to support the lower chassis; A connecting support seat; the connecting support seat is connected to the base, the connecting support seat has a connecting support surface, the connecting frame has a butt surface, the connecting support surface is adapted to the butt surface, and the connecting support surface is used to butt against the butt surface.

2. The cab welding tool according to claim 1, characterized in that: The cab welding tooling also includes a first limiting portion, which is connected to the base, and the height of one end of the first limiting portion away from the base is higher than the height of the upper support seat, and the first limiting portion is used to abut against a side of the upper frame away from the lower frame, and the first limiting portion is used to limit the movement of the upper frame in the first direction.

3. The cab welding tool according to claim 2, characterized in that: The first limiting portion and the upper supporting seat are arranged in the first direction and are located on a side of the upper supporting seat away from the lower supporting seat.

4. The cab welding tool according to claim 1, characterized in that: The number of the connecting support seats is two and the two connecting support seats are arranged at intervals along the second direction, and the first direction, the second direction and the height direction are perpendicular to each other; The number of the connecting frames is two and they are arranged at intervals along the second direction. Each connecting frame is placed on the connecting support seat, and the two sides of the lower base frame are respectively connected to the two connecting frames.

5. The cab welding tool according to claim 4, characterized in that: The cab welding tool further includes a second limiting portion, and the second limiting portion is connected to the base; The second limiting portion is used to abut against the connecting frame to limit the movement of the connecting frame along the second direction, and / or the second limiting portion is used to abut against the lower base frame to limit the movement of the lower base frame in the first direction.

6. The cab welding tool according to claim 5, characterized in that: There are two second limiting portions, and the two second limiting portions are arranged at intervals along the second direction. When the bottom frame is placed on the cab welding tooling, the two second limiting portions are located between the two connecting frames, and each second limiting portion is used to abut against the connecting frame and the lower frame at the same time.

7. The cab welding tool according to claim 4, characterized in that: The lower chassis includes a cross beam and a longitudinal beam, the two ends of the cross beam are respectively connected to the two connecting frames, the longitudinal beam is connected to the cross beam and extends along the first direction, and the base is also provided with a third limiting portion, which extends along the height direction and is used to abut against the longitudinal beam to limit the movement of the lower chassis in the second direction.

8. The cab welding tool according to claim 7, characterized in that: There are multiple longitudinal beams and they are spaced apart from the cross beam along the second direction. There are multiple third limiting portions and they are spaced apart along the second direction. When the bottom frame is placed on the cab welding tooling, there is a third limiting portion between any two adjacent longitudinal beams, and the third limiting portion abuts against the longitudinal beams.

9. The cab welding tool according to claim 1, characterized in that: The cab welding tool further comprises a connecting support portion provided on the base, wherein the connecting support portion is located between the upper support seat and the lower support seat; The bottom frame further includes a connecting pipe, which extends in the height direction. Both ends of the connecting pipe are respectively connected to the upper bottom frame and the lower bottom frame. The connecting pipe is used to abut against the connecting support portion.

10. The cab welding tool according to claim 1, characterized in that: The cab welding tool also includes a tool fixture, and the tool fixture is used to clamp the bottom frame and the cab welding tool.

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