Riveting tool for frame cross beam

Abstract

The utility model discloses a riveting tool for a frame cross beam, which comprises two oppositely arranged positioning plate components and two oppositely arranged positioner connecting plates which are encircled to form a rack and are used for positioning and fixing a bent connecting plate and the cross beam so as to overturn along with a positioner, wherein the two ends of one positioning plate assembly are connected with the sliding rails on the two positioner connecting plates, the positioning plate assemblies are used for fixing cross beams of different sizes through sliding adjustment, and rivet anti-falling assemblies are arranged on the positioning plate assemblies and used for abutting against rivets between the bending connecting plates and the cross beams so as to prevent the rivets from falling off when the rack turns over. The riveting tool for the frame cross member has the advantages of being simple in structure, high in applicability, stable in riveting quality, high in percent of pass, high in riveting efficiency and the like.

Description

Technical Field

[0001] This utility model relates to the technical field of crossbeam assembly devices, specifically to a riveting fixture for vehicle frame crossbeams. Background Technology

[0002] The crossbeam assembly is assembled from the crossbeam body and the bent connecting plate by riveting or bolting. The crossbeam assembly is not only used to ensure the torsional stiffness of the frame and to bear longitudinal and lateral loads, but also to support other components on the vehicle. It is an important component of the chassis, so its assembly quality is very important.

[0003] The existing riveting devices for vehicle frame crossbeams have inconsistent assembly quality and low pass rates, making them unsuitable for automated riveting. Manual riveting involves high labor intensity and low assembly efficiency. Existing technical solutions have the following shortcomings:

[0004] 1. The existing crossbeam assembly riveting device has poor versatility and cannot adapt to various types of crossbeam riveting. However, crossbeams come in various forms with different dimensions, and the rivet directions on the upper and lower sides may be the same or opposite.

[0005] 2. When the riveting directions on the upper and lower sides of the crossbeam are different, the workpiece needs to be rotated to expose the riveting points so that the robot can perform automatic riveting. When the existing frame crossbeam assembly riveting device drives the crossbeam to the working surface, the rivets are prone to fall off, resulting in unstable riveting quality and low pass rate. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a riveting fixture for vehicle frame crossbeams that is simple in structure, highly versatile, has stable riveting quality and a high pass rate.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A riveting fixture for a vehicle frame crossbeam includes two opposing positioning plate assemblies and two opposing positioner connecting plates to form a frame for positioning and fixing the bending connecting plate and the crossbeam so that they can rotate with the positioner. Both ends of one of the positioning plate assemblies are connected to slide rails on the two positioner connecting plates for adjusting the crossbeams of different sizes by sliding. The positioning plate assembly is provided with a rivet anti-drop component for pressing the rivets between the bending connecting plate and the crossbeam to prevent the rivets from falling off when the frame rotates.

[0009] As a further improvement to the above technical solution:

[0010] The rivet anti-falling assembly comprises a rotating shaft, a connecting part and an abutting part, one end of the rotating shaft is connected with a spinning driving element, the other end of the rotating shaft is connected with the connecting part, the abutting part is hinged on the connecting part, the spinning driving element drives the rotating shaft to rotate to the position of the rivet in the rack and then presses down to make the abutting part abut against the rivet.

[0011] The positioning plate assembly comprises a mounting plate, guide rails and a plurality of positioning and clamping units for clamping two ends of the bent connecting plate, the guide rails are arranged on the inner wall of the mounting plate along the length direction of the mounting plate, and the positioning and clamping units are slidably arranged on the guide rails and used for clamping and fixing bent connecting plates of different sizes by sliding adjustment.

[0012] The positioning and clamping unit comprises a quick-release backing plate and a telescopic pressing arm, the quick-release backing plate is detachably connected with a positioning pin and used for positioning and fixing the bent connecting plate, and the telescopic pressing arm is connected with a telescopic cylinder and used for retracting to the mounting plate direction after the positioning pin is inserted into the bent connecting plate to press the bent connecting plate.

[0013] The quick-release backing plate is provided with a quick-release locking screw for connecting the positioning pin.

[0014] The quick-release backing plate is provided with a plurality of quick-insert blocks connected with the positioning pin and used for adapting to bent connecting plates of different angles, and the positioning pin is inserted into the quick-insert block and then the quick-release locking screw is rotated to realize quick connection.

[0015] The guide rails are provided with stop blocks at two ends and used for avoiding the positioning and clamping units from sliding out of the guide rails.

[0016] The variable-positioning machine connecting plate is provided with a screw rod transmission assembly for driving the slidable positioning plate assembly to slide, the screw rod transmission assembly comprises a screw rod driving element fixed on the variable-positioning machine connecting plate and a screw rod arranged on the positioning plate assembly, and the driving end of the screw rod driving element is connected with the screw rod and used for driving the screw rod to rotate to drive the positioning plate assembly to slide along the slide rail.

[0017] The mounting plate is provided with a plurality of pin hole positioning blocks for inserting pins to limit the positioning and clamping units when the positioning and clamping units slide into position.

[0018] The two ends of the other non-slidable positioning plate assembly are fixedly connected with the two variable-positioning machine connecting plates through right-angle fixing elements.

[0019] Compared with the prior art, the positioning plate assembly has the advantages that:

[0020] The utility model discloses a kind of riveting tool for frame crossbeam, through the positioning plate component of relatively arranged and the frame positioning and fixed bending connecting plate and crossbeam formed by the frame connecting plate of relatively arranged positioner, when fixed bending connecting plate and crossbeam have multiple riveting points of different riveting directions, overturn positioner drives frame and bending connecting plate and crossbeam fixed on frame overturn, expose riveting point, so that welding robot can conveniently and quickly rivet, and so that artificial once continuous time intervention can realize the insertion of crossbeam two sides rivet, greatly improve riveting efficiency and quality.

[0021] The utility model discloses a kind of riveting tool for frame crossbeam, by the positioning plate component of one end and the frame connecting plate of relatively arranged positioner slide rail connection of two ends, so that positioning plate component can slide along slide rail, flexibly adaptability adjustment is carried out according to the size of crossbeam assembly, so that the general-purpose of this tool is strong.

[0022] The utility model discloses a kind of riveting tool for frame crossbeam, by setting rivet prevent falling component and resist the rivet between bending connecting plate and crossbeam, avoid rivet drop when frame rotates, improve tool riveting efficiency and quality.

[0023] The utility model discloses a kind of riveting tool for frame crossbeam, by setting rivet prevent falling component including pivot, connecting portion and abutting portion, before positioner drives frame to rotate 0 °, spinning drive member drives pivot and drives connecting portion to press down, so that connecting portion resists rivet.Rivet not welded in the process of rotating when frame overturn is avoided to drop, avoid to increase the process of supplementary rivet, greatly improve riveting quality and efficiency.

[0024] The utility model discloses a kind of riveting tool for frame crossbeam, by setting positioning clamping unit slidably connected with mounting plate, on the one hand, the quick positioning and connection of bending connecting plate are realized, on the other hand, it is suitable for bending connecting plate of multiple sizes, greatly improve the applicability of device.

[0025] The utility model discloses a kind of riveting tool for frame crossbeam, by setting positioning clamping unit can detachably connect bending connecting plate, positioning pin passes through the pupil of bending connecting plate, and bending connecting plate is positioned and fixed, then, drive pressure arm is retracted to mounting plate direction to press bending connecting plate tightly, further fix bending connecting plate to avoid bending connecting plate to come out, improve connection strength.

[0026] The utility model discloses a kind of riveting tool for frame crossbeam, by setting quick-release locking screw, different shapes sizes positioning pin can be quickly disassembled to adapt to different bending connecting plate, improve the applicability of tool.

[0027] Eight, the utility model discloses a riveting tool for frame crossbeam, a plurality of quick insertion blocks connected with the positioning pin are equipped on the quick detachable base plate to adapt to the bending connecting plate of different angles, and the applicability of the tool is further improved.

[0028] Nine, the utility model discloses a riveting tool for frame crossbeam, by setting the stopper, avoid the derailment of the positioning and clamping unit, greatly improve the reliability of the tool.

[0029] Ten, the utility model discloses a riveting tool for frame crossbeam, by setting the pin hole positioning block, the positioning and clamping unit that has slid into position is positioned, avoid the positioning and clamping unit to continue to slide and cause the positioning deviation of the bending connecting plate. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is the three-dimensional structure principle schematic view of the utility model discloses a riveting tool for frame crossbeam.

[0031] Figure 2 It is the enlarged structure principle schematic view of A of Figure 1

[0032] Figure 3 It is the structure principle schematic view of the positioning and clamping unit of the utility model discloses a riveting tool for frame crossbeam.

[0033] Figure 4 It is the overhead structure principle schematic view of the utility model discloses a riveting tool for frame crossbeam.

[0034] The various reference numerals in the drawing represent: 1, crossbeam;2, bending connecting plate;3, rack;31, positioning plate assembly;311, mounting plate;312, guide rail;313, positioning and clamping unit;3131, quick detachable base plate;3132, pressing arm;3133, positioning pin;3134, quick detachable locking screw;314, stopper;315, pin hole positioning block;32, positioner connecting plate;321, slide rail;33, rivet anti-drop assembly;331, rotating shaft;332, connecting portion;333, abutting portion;334, spinning driving part;4, screw rod transmission assembly;41, screw rod;42, screw rod driving part;5, right-angle fixing piece. DETAILED DESCRIPTION

[0035] The utility model will be further explained in detail in combination with the drawing and specific embodiment of the specification.

[0036] ​In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] like Figures 1 to 4 As shown, the riveting fixture for the crossbeam of the vehicle frame in this embodiment includes two opposing positioning plate assemblies 31 and two opposing positioner connecting plates 32 to form a frame 3, which is used to position and fix the bending connecting plate 2 and the crossbeam 1 so that they can rotate with the positioner. Both ends of one positioning plate assembly 31 are connected to the slide rails 321 on the two positioner connecting plates 32, and are used to fix crossbeams 1 of different sizes by sliding adjustment. The positioning plate assembly 31 is provided with a rivet anti-drop component 33, which is used to press the rivets between the bending connecting plate 2 and the crossbeam 1 to prevent the rivets from falling off when the frame 3 rotates.

[0040] The specific implementation principle of the riveting fixture used for the crossbeam of the vehicle frame is as follows:

[0041] The riveting tool for the frame crossbeam, in use, first, the two bottom bent connecting plates 2 are respectively fixed on the opposite positioning plate assemblies 31. Then, according to the size of the crossbeam 1, one of the positioning plate assemblies 31 is driven to slide on the slide rail 321 to the position where the two bent connecting plates 2 respectively bear the two ends of the crossbeam 1 and the riveting points correspond, and the positioning plate assembly 31 and the positioner connecting plate 32 are slidably connected, so that the tool is suitable for crossbeams 1 of different sizes. Further, after the crossbeam 1 is placed on the fixed bent connecting plates 2, the two top bent connecting plates 2 are respectively fixed on the opposite positioning plate assemblies 31, so that the top and bottom of the two ends of the crossbeam 1 respectively abut against the bent connecting plates 2. Then, the rivets are placed at the riveting points of the crossbeam 1 and the top bent connecting plates 2 at the two ends of the crossbeam 1, and the rivet anti-falling assembly 33 is driven to abut against the rivets between the bent connecting plates 2 and the crossbeam 1 to avoid the falling of the rivets that have not been welded when the rack 3 is turned over. After ensuring that the rivet anti-falling assembly 33 limits the rivets, the rack 3 and the bent connecting plates 2 and the crossbeam 1 fixed on the rack 3 are turned over 180° by driving the turnover positioner, at this time, the bent connecting plate 2 originally located at the bottom of the crossbeam 1 is turned over to the top, exposing the riveting points of the crossbeam 1 and the bottom bent connecting plate 2, and the rivets are placed at the riveting points. Finally, the worker is manually removed to a safe position, and the welding robot is started to automatically rivet. After turning back, the rivet anti-falling assembly 33 is removed, and the welding of the rivets that have not been welded is performed.

[0042] Through the above special design, the riveting tool for the frame crossbeam has the following advantages:

[0043] I. The rack 3 formed by the opposite positioning plate assemblies 31 and the opposite positioner connecting plates 32 encloses and fixes the bent connecting plates 2 and the crossbeam 1. When the fixed bent connecting plates 2 and the crossbeam 1 have multiple riveting points with different riveting directions, the rack 3 and the bent connecting plates 2 and the crossbeam 1 fixed on the rack 3 are turned over by driving the turnover positioner, exposing the riveting points, so that the welding robot can conveniently and quickly rivet, and only one continuous time intervention of the worker can complete the insertion of the rivets on both sides of the crossbeam 1, greatly improving the safety of production and the production efficiency.

[0044] II. By slidably connecting the two ends of one of the positioning plate assemblies 31 with the opposite positioner connecting plates 32, the positioning plate assembly 31 can slide along the slide rail 321, and can be adaptively adjusted according to the size of the crossbeam assembly, so that the tool has strong versatility.

[0045] III. By abutting the rivets between the bent connecting plates 2 and the crossbeam 1 through the rivet anti-falling assembly 33, the falling of the rivets when the rack 3 is turned over is avoided, and the riveting efficiency and quality of the tool are improved.

[0046] As Figure 1 and Figure 4As shown, in the embodiment, the rivet anti-falling assembly 33 includes a rotating shaft 331, a connecting part 332 and an abutting part 333. One end of the rotating shaft 331 is connected with a spinning driving part 334, and the other end is connected with the connecting part 332. The abutting part 333 is hinged on the connecting part 332. The spinning driving part 334 drives the rotating shaft 331 to rotate the connecting part 332 to the rivet position in the rack 3, and then drives the connecting part 332 to press down to make the abutting part 333 tightly abut against the rivet. Before the rack 3 is rotated 180° by the positioner, the spinning driving part 334 drives the rotating shaft 331 to rotate the connecting part 332 to the rivet position in the rack 3, and then drives the connecting part 332 to press down, so that the connecting part 332 tightly abuts against the rivet. This avoids the un-welded rivet from falling during the rotation of the rack 3 when it is turned over, and avoids the process of adding rivets, greatly improving the riveting quality and efficiency.

[0047] As shown in the drawings, Figures 1 to 3 In the embodiment, the positioning plate assembly 31 includes a mounting plate 311, a guide rail 312 and a plurality of positioning and clamping units 313 for clamping both ends of the bent connecting plate 2. The guide rail 312 is arranged on the inner wall of the mounting plate 311 along the length direction of the mounting plate 311. The positioning and clamping units 313 are slidably mounted on the guide rail 312 and are used to clamp and fix bent connecting plates 2 of different sizes by sliding adjustment. According to the size of the bent connecting plate 2, the positioning and clamping units 313 are driven to slide on the guide rail 312 on the mounting plate 311, so that the positioning and clamping units 313 connect both ends of the bent connecting plate 2 at the bottom of the cross beam 1, and the bent connecting plate 2 at the bottom is detachably connected to the mounting plate 311. The bent connecting plate 2 at the bottom is fixed to bear the cross beam 1, improving the reliability of the tooling, and also providing a positioning basis for connecting the bent connecting plate 2 at the top, improving the assembly efficiency. After the positioner is rotated 180°, the clamping of the positioning and clamping units 313 is released, and the riveting points of the cross beam 1 and the bent connecting plate 2 are exposed to facilitate workers to insert rivets. By setting the positioning and clamping units 313 which are slidably connected with the mounting plate 311, on the one hand, the positioning and clamping units 313 realize quick positioning and connection of the bent connecting plate 2, and on the other hand, they are suitable for bent connecting plates 2 of multiple sizes, greatly improving the applicability of the device.

[0048] As shown in the drawings, Figures 1 to 3As shown, in the embodiment, the positioning and clamping unit 313 comprises a quick-release base plate 3131 and a telescopic pressing arm 3132, the positioning pin 3133 is detachably connected to the quick-release base plate 3131 for positioning and fixing the folded bending connecting plate 2, the telescopic pressing arm 3132 is connected with the telescopic cylinder and is used to drive the telescopic pressing arm 3132 to retract towards the mounting plate 311 after the positioning pin 3133 is inserted into the folded bending connecting plate 2, so as to press the folded bending connecting plate 2 tightly. By detachably connecting the folded bending connecting plate 2 through the positioning and clamping unit 313, the positioning pin 3133 is inserted into the through hole of the folded bending connecting plate 2 to position and fix the folded bending connecting plate 2, then the telescopic pressing arm 3132 is driven to retract towards the mounting plate 311 to press the folded bending connecting plate 2 tightly, so as to further fix the folded bending connecting plate 2 and avoid the folded bending connecting plate 2 from coming out, thereby improving the connecting strength.

[0049] As shown in Figure 3 In the embodiment, the quick-release base plate 3131 is provided with a quick-release locking screw 3134 for connecting the positioning pin 3133. By providing the quick-release locking screw 3134, the positioning pin 3133 with different shapes and sizes can be quickly disassembled and assembled to adapt to different folded bending connecting plates 2, thereby improving the applicability of the tooling.

[0050] As shown in Figure 3 In the embodiment, the quick-release base plate 3131 is provided with a plurality of quick-insert blocks (not shown in the figure) connected with the positioning pin 3133 for adapting to the folded bending connecting plates 2 with different angles, the positioning pin 3133 is inserted into the quick-insert block and then the quick-release locking screw 3134 is rotated to realize quick connection. By providing a plurality of quick-insert blocks connected with the positioning pin 3133 on the quick-release base plate 3131 to adapt to the folded bending connecting plates 2 with different angles, the applicability of the tooling is further improved.

[0051] As shown in Figure 1 In the embodiment, the guide rail 312 is provided with a stop block 314 at both ends for avoiding the positioning and clamping unit 313 from sliding out of the guide rail 312. By providing the stop block 314, the positioning and clamping unit 313 is prevented from derailing and sliding out, thereby greatly improving the reliability of the tooling.

[0052] As shown in Figure 1 and Figure 4As shown in the drawings, in the embodiment, the positioner connecting plate 32 is provided with a screw rod transmission assembly 4 for driving the slidable positioning plate assembly 31 to slide, the screw rod transmission assembly 4 comprises a screw rod driving part 42 fixed on the positioner connecting plate 32 and a screw rod 41 penetrating through the positioning plate assembly 31, the driving end of the screw rod driving part 42 is connected with the screw rod 41, and the screw rod driving part 42 is used for driving the screw rod 41 to rotate so as to drive the positioning plate assembly 31 to slide along the slide rail 321. By arranging the screw rod transmission assembly 4 to drive the positioning plate assembly 31 to slide on the slide rail 321 to adapt to the size of the cross beam 1, the screw rod driving part 42 drives the screw rod 41 to rotate to drive the positioning plate assembly 31 to slide along the slide rail 321, the screw rod driving part 42 has high driving stability and high precision, and the high positioning precision requirement of the tooling can be realized.

[0053] As Figure 2 shown, in the embodiment, the mounting plate 311 is provided with a plurality of pin hole positioning blocks 315 for inserting a pin to limit the positioning and clamping unit 313 after the positioning and clamping unit 313 is slid to the position. The pin hole positioning block 315 is arranged to limit the positioning and clamping unit 313 that has been slid to the position, so that the positioning and clamping unit 313 is prevented from continuously sliding to cause the positioning deviation of the bent connecting plate 2.

[0054] As Figure 1 and Figure 4 shown, in the embodiment, the two ends of the other slidable positioning plate assembly 31 are fixedly connected with the two positioner connecting plates 32 through the right-angle fixing parts 5. The right-angle fixing parts 5 are arranged between the two positioner connecting plates 32 at the two ends of the slidable positioning plate assembly 31 to improve the connection strength of the positioning plate assembly 31 and the positioner connecting plate 32, the deformation of the large-size plate during use is avoided, and the reliability of the tooling is greatly improved.

[0055] Although the present application has been disclosed with reference to the preferred embodiments, it is not intended to limit the present application. Any person skilled in the art, without departing from the technical scheme of the present application, can make many possible changes and modifications to the technical scheme of the present application disclosed above, or modify equivalent embodiments with equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application should fall within the protection scope of the technical scheme of the present application.

Claims

1. A riveting tool for a vehicle frame cross member, characterized by: The application discloses a bending connecting plate positioning device, which comprises two positioning plate assemblies (31) and two positioner connecting plates (32) which are oppositely arranged to form a rack (3) for positioning and fixing a bending connecting plate (2) and a cross beam (1) to be turned with the positioner, wherein the two ends of one of the positioning plate assemblies (31) are connected with slide rails (321) on the two positioner connecting plates (32) for adjusting the size of the cross beam (1) by sliding, and a rivet anti-falling assembly (33) is arranged on the positioning plate assembly (31) for abutting against the rivet between the bending connecting plate (2) and the cross beam (1) to prevent the rivet from falling when the rack (3) is turned.

2. The riveting tool for a vehicle frame cross member according to claim 1, characterized by: The rivet anti-falling assembly (33) comprises a rotating shaft (331), a connecting part (332) and an abutting part (333), one end of the rotating shaft (331) is connected with a spinning driving part (334), the other end is connected with the connecting part (332), the connecting part (332) is hinged with the abutting part (333), and the spinning driving part (334) drives the rotating shaft (331) to rotate the connecting part (332) to the position of the rivet in the rack (3) and then press down to make the abutting part (333) abut against the rivet.

3. The riveting tool for a vehicle frame cross member according to claim 1, characterized by: The positioning plate assembly (31) comprises a mounting plate (311), a guide rail (312) and a plurality of positioning clamping units (313) for clamping the two ends of the bending connecting plate (2), the guide rail (312) is arranged on the inner wall of the mounting plate (311) along the length direction of the mounting plate (311), and the positioning clamping units (313) are slidably arranged on the guide rail (312) for clamping and fixing the bending connecting plate (2) of different sizes by sliding.

4. The riveting tool for a vehicle frame cross member according to claim 3, characterized by: The positioning clamping unit (313) comprises a quick-release backing plate (3131) and a telescopic pressing arm (3132), the quick-release backing plate (3131) is detachably connected with a positioning pin (3133) for positioning and fixing the bending connecting plate (2), and the telescopic pressing arm (3132) is connected with a telescopic cylinder for driving the telescopic pressing arm (3132) to retract towards the mounting plate (311) after the positioning pin (3133) is inserted into the bending connecting plate (2) to press the bending connecting plate (2) tightly.

5. The riveting tool for a vehicle frame cross member according to claim 4, characterized by: The quick-release backing plate (3131) is provided with a quick-release locking screw (3134) for connecting the positioning pin (3133).

6. The riveting tool for a vehicle frame cross member according to claim 5, characterized by: The quick-release backing plate (3131) is provided with a plurality of quick-insert blocks connected with the positioning pin (3133) for adapting to the bending connecting plate (2) of different angles, and the positioning pin (3133) is inserted into the quick-insert block and then the quick-release locking screw (3134) is rotated to realize quick connection.

7. The riveting tool for a vehicle frame cross member according to claim 3, characterized by: The guide rail (312) is provided with a stop block (314) at both ends for preventing the positioning clamping unit (313) from sliding out of the guide rail (312).

8. The riveting tool for a vehicle frame cross member according to claim 1, characterized by: The variable positioner connecting plate (32) is provided with a screw rod transmission assembly (4) for driving the slidable positioning plate assembly (31) to slide, the screw rod transmission assembly (4) comprises a screw rod driving part (42) fixed on the variable positioner connecting plate (32) and a screw rod (41) penetrating through the positioning plate assembly (31), the driving end of the screw rod driving part (42) is connected with the screw rod (41) for driving the screw rod (41) to rotate so as to drive the positioning plate assembly (31) to slide along the slide rail (321).

9. The riveting tool for a vehicle frame cross member according to claim 3, characterized by: The mounting plate (311) is provided with a plurality of pin hole positioning blocks (315) for inserting the pin to limit the positioning clamping unit (313) after the positioning clamping unit (313) is slid to the position.

10. The riveting tool for a vehicle frame cross member according to claim 8, characterized by: The two ends of the other slidable positioning plate assembly (31) are fixedly connected with the two variable positioner connecting plates (32) through the right-angle fixing parts (5).

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