Clamping device for automobile floor laser welding

Abstract

The utility model provides a clamping device for automobile floor laser welding, and belongs to the technical field of automobile welding. The base is used for placing a to-be-welded automobile floor assembly; the rotary pressing mechanism is arranged on one side of the base, the fixed end of the rotary pressing mechanism is fixedly arranged relative to the base, and the movable end of the rotary pressing mechanism rotates relative to the fixed end and abuts against the surface of the non-welding position of the automobile floor assembly; the auxiliary pressing mechanisms are arranged on the side face of the base and used for conducting position locking on the movable ends of the rotary pressing mechanisms abutting against the automobile floor assembly; and the floating pressing devices are arranged at the movable end of the rotary pressing mechanism and used for pressing the area where the welding seam of the automobile floor assembly is located, and the pressing force of the floating pressing devices on the automobile floor assembly is independently adjustable. By locking the position of the rotary pressing mechanism and adjusting the pressure of each floating pressing device to be consistent with the pressure of the welding position, reliable pressing is achieved through fine adjustment of the pressure, and the quality of laser fusion welding is improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive welding technology, and in particular to a clamping device for laser welding of automotive flooring. Background Technology

[0002] Existing automotive floor assemblies are often assembled from multiple sheet metal parts. For large-area welding of overlapping parts, floor laser welding fixtures typically use cylinders for clamping. The clamping pressure of the cylinders is constant, and the fit between the workpieces cannot be guaranteed. If the pressure on the sheet metal parts is too low, gaps will exist between the sheet metal parts, resulting in welding defects such as slag inclusions, bubbles, and incomplete welds during laser welding. If the pressure on the sheet metal parts is too high, it may cause local deformation of the sheet metal parts, resulting in poor appearance after laser welding.

[0003] Therefore, it is essential to propose a clamping device for laser welding of automotive flooring that can independently adjust the clamping force in the welding area to ensure that the pressure at each clamping position is basically consistent, thereby improving the welding quality. Utility Model Content

[0004] In view of this, the present invention proposes a clamping device for laser welding of automotive floor components, which can independently adjust the pressure of each floating clamping device on the automotive floor assembly to be welded, improve the consistency of pressure in the welding area, and thus improve the welding quality.

[0005] This utility model provides a clamping device for laser welding of automotive flooring, comprising:

[0006] A base for holding the automotive floor assembly to be welded;

[0007] A rotary clamping mechanism is set on one side of the base. The fixed end of the rotary clamping mechanism is fixed relative to the base, and the movable end rotates relative to the fixed end and abuts against the surface of the non-welded position of the automotive floor assembly.

[0008] Several auxiliary clamping mechanisms are provided on the side of the base to lock the position of the movable end of the rotary clamping mechanism that abuts against the automotive floor assembly;

[0009] Several floating clamping devices are installed at the movable end of the rotary clamping mechanism to clamp the area where the weld of the automotive floor assembly is located. The clamping force of the several floating clamping devices on the automotive floor assembly is independently adjustable.

[0010] Based on the above technical solution, preferably, the rotary pressing mechanism includes two fixed bases, a rotating shaft, a connecting rod, a pressure arm, and a first linear drive mechanism; the two fixed bases are arranged opposite each other and spaced apart, the rotating shaft passes through the ends of the two fixed bases away from the ground, and the rotating shaft is rotatably connected to the two fixed bases; a connecting rod and a pressure arm are provided on the rotating shaft, one end of the connecting rod and one end of the pressure arm are respectively fixedly connected to the rotating shaft, the connecting rod and the pressure arm both extend along the radial direction of the rotating shaft, and the connecting rod and the pressure arm are arranged at an angle; the first linear drive mechanism is fixed relative to the ground, the movable end of the first linear drive mechanism is hinged to the end of the connecting rod away from the rotating shaft, and the first linear drive mechanism drives the rotating shaft to rotate relative to the two fixed bases, so that the pressure arm rotates and abuts against or separates from the automotive floor assembly.

[0011] Preferably, the length of the connecting rod extending radially along the rotation axis is less than the length of the pressure arm extending radially along the rotation axis; a counterweight is also provided on the connecting rod, and the counterweight is fixedly connected to the connecting rod.

[0012] More preferably, each of the two fixed bases is provided with a second linear drive mechanism, the central axis of the movable end of the second linear drive mechanism is arranged parallel to the central axis of the rotating shaft; a positioning part is fixedly provided on the rotating shaft, the positioning part extends outward in a direction away from the rotating shaft, and one end of the positioning part is fixedly connected to the pressure arm, and the other end of the positioning part is in the same direction as the extension of the connecting rod; a first through hole is also provided on the side where the other end of the positioning part is located, the shape of the first through hole matches the shape of the movable end of the second linear drive mechanism; the movable end of the second linear drive mechanism is used to insert into the first through hole to lock the initial position of the rotating shaft.

[0013] Preferably, a mounting bracket is fixedly provided on the side of the pressure arm near the vehicle floor assembly, and the mounting bracket is arranged along the extension direction of the rotation axis; a plurality of floating clamping devices are arranged in an array on the mounting bracket, the plurality of floating clamping devices extend toward the direction near the vehicle floor assembly, and the gap between the two ends of the plurality of floating clamping devices near the vehicle floor assembly and the vehicle floor assembly is adjustable.

[0014] In a further preferred embodiment, each of the floating clamping devices includes a fixing bolt, two guide rods, a pressure block, two threaded guide sleeves, and a telescopic spring. The mounting bracket is provided with several second through holes and several third through holes. The pressure block is parallel to the mounting bracket and spaced apart. One end of the fixing bolt is connected to the pressure block, and the other end of the fixing bolt passes through the second through hole and is fastened to the mounting bracket. Two guide rods are respectively provided at the edge of the pressure block. The surfaces of the two guide rods are provided with external threads. The two guide rods extend towards the mounting bracket and pass through the third through holes respectively. The two threaded guide sleeves are screwed onto the surfaces of the two guide rods passing through the third through holes. The two threaded guide sleeves are provided with internal threads and are threadedly connected to the guide rods. A telescopic spring is also sleeved on the two guide rods between the pressure block and the mounting bracket.

[0015] More preferably, the pressure block includes a first stop, a second stop, a third stop, and a step portion. The first stop and the second stop are parallel and spaced apart. The third stop is fixedly connected to the adjacent ends of the first stop and the second stop. The step portion is located on the edge of the first stop, the third stop, and the second stop away from the vehicle floor assembly, and extends outward toward the first stop, the third stop, and the second stop. Fixing bolts and two guide rods are spaced apart at different positions on the step portion.

[0016] In an even more preferred embodiment, the gap area between the first stop, the second stop, and the third stop does not coincide with the projection of the mounting bracket on the horizontal plane.

[0017] More preferably, the side of the pressure arm near the automotive floor assembly is further provided with a plurality of third linear drive mechanisms arranged in an array, the fixed ends of the plurality of third linear drive mechanisms being fixedly connected to the pressure arm, and the movable ends of the plurality of third linear drive mechanisms abutting against the surface of the non-welded position of the automotive floor assembly.

[0018] Preferably, a plurality of auxiliary pressing mechanisms are respectively disposed at both ends of the base extending along the axial direction of the rotation axis; a horizontal positioning block is disposed on the base; each of the plurality of auxiliary pressing mechanisms includes a fourth linear drive mechanism, two first swing arms, two second swing arms and a floating block, the movable end of the fourth linear drive mechanism is hinged to the base, the two first swing arms are arranged in parallel, the horizontal positioning block and the floating block are both located in the gap between the two first swing arms, and the floating block is hinged to the end of the horizontal positioning block away from the vehicle floor assembly; each of the two first swing arms includes a first end, a second end and a third end, the first end of the two first swing arms is hinged to the base, the second end extends outward in a direction away from the ground, the third end extends outward horizontally in a direction away from the vehicle floor assembly, the third end of the two first swing arms is hinged to the movable end of the fourth linear drive mechanism, the second end of the first swing arm is hinged to one end of the second swing arm, and the other end of the second swing arm is hinged to the non-end position of the floating block.

[0019] The clamping device for laser welding of automotive flooring provided by this utility model has the following advantages compared with the prior art:

[0020] (1) The rotary pressing mechanism provided by this utility model, together with the floating pressing device and multiple third linear drive mechanisms, can reliably press the welded and non-welded parts of a large area of ​​sheet metal parts, and can make targeted pressure adjustment for the weld area to achieve tight fit of different sheet metal parts, improve the quality of subsequent laser welding, and the floating pressing device can adapt to the combination requirements of different sheet metal parts, and has good practicality and reliability.

[0021] (2) Based on the actual installation situation, manually check whether the gap between each floating clamping device and the sheet metal part to be welded meets the requirements. If the gap does not meet the requirements, adjust the position of the guide rod at that position by adjusting the threaded guide sleeve, thereby adjusting the pressure provided by the telescopic spring. When all floating clamping devices meet the gap and pressure requirements, subsequent welding can be carried out.

[0022] (3) The second linear drive mechanism is combined with the positioning part to lock the position of the rotary clamping mechanism in the non-clamping state, which can prevent personal injury accidents caused by abnormal fall of the moving end of the rotary clamping mechanism; when the rotary clamping mechanism is in the clamping state, the position of the moving end of the rotary clamping mechanism is further fixed by the auxiliary clamping mechanisms on both sides, thereby improving the reliability of the clamping state. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a perspective view of the clamping device for laser welding of automotive flooring according to the present invention in use.

[0025] Figure 2 This is a perspective view of the rotary clamping mechanism of a clamping device for laser welding of automotive flooring according to the present invention;

[0026] Figure 3 for Figure 2 A magnified view of part A;

[0027] Figure 4 This is a top view of a clamping device for laser welding of automotive flooring according to the present invention;

[0028] Figure 5 This is a right view of a clamping device for laser welding of automotive flooring according to the present invention;

[0029] Figure 6 This is an enlarged perspective view of the auxiliary clamping mechanism of a clamping device for laser welding of automotive flooring according to this utility model.

[0030] Reference numerals: 1. Base; 2. Rotary clamping mechanism; 3. Auxiliary clamping mechanism; 4. Floating clamping device;

[0031] 21. Fixed base; 22. Rotating shaft; 23. Connecting rod; 24. Pressure arm; 25. First linear drive mechanism; 26. Counterweight; 27. Second linear drive mechanism; 28. Positioning part; 100. First through hole; 29. ​​Mounting bracket; 210. Third linear drive mechanism;

[0032] 41. Fixing bolt; 42. Guide rod; 43. Pressure block; 44. Threaded guide sleeve; 45. Telescopic spring; 200. Second through hole; 300. Third through hole; 431. First stop block; 432. Second stop block; 433. Third stop block; 434. Stepped section;

[0033] 11. Horizontal positioning block; 31. Fourth linear drive mechanism; 32. First swing arm; 33. Second swing arm; 34. Floating block; 32a. First end; 32b. Second end; 32c. Third end. Detailed Implementation

[0034] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0035] Existing automotive floor assemblies are typically clamped directly using cylinders before welding. However, the constant pressure of the cylinders makes it difficult to guarantee the fit between workpieces, often resulting in poor welding. Therefore, if... Figure 1 and Figure 2 As shown, this utility model provides a clamping device for laser welding of automotive flooring, comprising:

[0036] Base 1 is used to hold the automotive floor assembly to be welded;

[0037] The rotary clamping mechanism 2 is located on one side of the base 1. The fixed end of the rotary clamping mechanism 2 is fixed relative to the base 1, and the movable end rotates relative to the fixed end and abuts against the surface of the non-welded position of the automotive floor assembly.

[0038] Several auxiliary clamping mechanisms 3 are provided on the side of the base 1 for locking the position of the movable end of the rotary clamping mechanism 2 that abuts against the automotive floor assembly;

[0039] Several floating clamping devices 4 are installed at the movable end of the rotary clamping mechanism 2 to clamp the area where the weld of the automotive floor assembly is located. The clamping force of the several floating clamping devices 4 on the automotive floor assembly is independently adjustable.

[0040] The floating clamping device 4 can independently adjust the pressure of the weld area to ensure that each clamping part meets the clamping requirements for welding, thereby improving the quality of subsequent laser welding.

[0041] like Figure 2 As shown, the rotary pressing mechanism 2 includes two fixed bases 21, a rotating shaft 22, a connecting rod 23, a pressing arm 24, and a first linear drive mechanism 25. The two fixed bases 21 are arranged opposite each other and spaced apart. The rotating shaft 22 passes through the ends of the two fixed bases 21 away from the ground and is rotatably connected to the two fixed bases 21. The rotating shaft 22 is provided with a connecting rod 23 and a pressing arm 24. One end of the connecting rod 23 and one end of the pressing arm 24 are respectively fixedly connected to the rotating shaft 22. The connecting rod 23 and the pressing arm 24 both extend along the radial direction of the rotating shaft 22 and are arranged at an angle to each other. The first linear drive mechanism 25 is fixed relative to the ground. The movable end of the first linear drive mechanism 25 is hinged to the end of the connecting rod 23 away from the rotating shaft 22. The first linear drive mechanism 25 drives the rotating shaft 22 to rotate relative to the two fixed bases 21, causing the pressing arm 24 to rotate and abut against or separate from the car floor assembly.

[0042] like Figure 2 As shown, the rotating shaft 22 is provided with connecting rods 23 and pressure arms 24 extending in different directions. The length of connecting rod 23 extending radially along the rotating shaft 22 is less than the length of pressure arms 24 extending radially along the rotating shaft 22, i.e., the length of connecting rod 23 is shorter. It is used to connect with the first linear drive mechanism 25. When the movable end of the first linear drive mechanism 25 extends horizontally, the driving connecting rod 23 drives the rotating shaft 22 and pressure arms 24 to rotate clockwise and press them onto the automotive floor assembly to be welded. After welding, the movable end of the first linear drive mechanism 25 retracts horizontally, and the driving connecting rod 23 drives the rotating shaft 22 and pressure arms 24 to rotate counterclockwise, realizing the opening and resetting of pressure arms 24. This process is repeated to achieve continuous welding operations in conjunction with the installation and unloading of the automotive floor assembly on the base 1.

[0043] In addition, a counterweight 26 is provided on the connecting rod 23, and the counterweight 26 is fixedly connected to the connecting rod 23. The counterweight 26 is used to improve the unbalanced mass distribution on the connecting rod 23 and the pressure arm 24. This improvement in mass distribution balance by adding the counterweight 26 is beneficial to improving the stability of the rotary pressing mechanism 2 during rotation. In this invention, the counterweight is plate-shaped, and the counterweight 26 is detachably connected to the connecting rod 23. Moreover, the number of counterweights 26 can be increased or decreased as needed.

[0044] like Figure 2 and Figure 4As shown, in order to limit the pressure arm 24 in the open state and prevent accidental flipping of the pressure arm 24 that could cause personal injury or damage to the car floor assembly, this utility model is equipped with a position locking structure. Specifically, a second linear drive mechanism 27 is provided on each of the two fixed bases 21. The central axis of the movable end of the second linear drive mechanism 27 is arranged parallel to the central axis of the rotating shaft 22. A positioning part 28 is fixedly provided on the rotating shaft 22. The positioning part 28 extends outward in a direction away from the rotating shaft 22, and one end of the positioning part 28 is fixedly connected to the pressure arm 24. The other end of the positioning part 28 is in the same direction as the extension of the connecting rod 23. A first through hole 100 is also provided on the side where the other end of the positioning part 28 is located. The shape of the first through hole 100 matches the shape of the movable end of the second linear drive mechanism 27. The movable end of the second linear drive mechanism 27 is used to insert into the first through hole 100 to lock the initial position of the rotating shaft 22. When the rotating shaft 22 and the pressure arm 24 rotate counterclockwise to the designated position, the movable end of the second linear drive mechanism 27 extends and inserts into the first through hole 100 of the positioning part 28, thereby locking the current position of the rotating shaft 22, the pressure arm 24 and the positioning part 28.

[0045] A mounting bracket 29 is fixedly installed on the side of the pressure arm 24 near the automotive floor assembly. The mounting bracket 29 is arranged along the extension direction of the rotation axis 22. A plurality of floating clamping devices 4 are arrayed on the mounting bracket 29, extending towards the automotive floor assembly. The gap between the two ends of the floating clamping devices 4 near the automotive floor assembly and the automotive floor assembly is adjustable. A plurality of third linear drive mechanisms 210 are also arrayed on the side of the pressure arm 24 near the automotive floor assembly. The fixed ends of the third linear drive mechanisms 210 are fixedly connected to the pressure arm 24, and the movable ends of the third linear drive mechanisms 210 abut against the surface of the non-welded portion of the automotive floor assembly. Through the multiple floating clamping devices 4 on the mounting bracket 29 and the multiple third linear drive mechanisms 210 on the pressure arm 24, adjustable pressure clamping and fixed pressure clamping can be applied to different positions of the automotive floor assembly to be welded.

[0046] like Figure 3As shown, each of the floating clamping devices 4 includes a fixing bolt 41, two guide rods 42, a pressure block 43, two threaded guide sleeves 44, and a telescopic spring 45. The mounting bracket 29 is provided with several second through holes 200 and several third through holes 300. The pressure block 43 is parallel to the mounting bracket 29 and spaced apart. One end of the fixing bolt 41 is connected to the pressure block 43, and the other end of the fixing bolt 41 passes through the second through hole 200 and is fastened to the mounting bracket 29. Two guide rods 42 are respectively provided at the edge of the pressure block 43. The surfaces of the two guide rods 42 are provided with external threads. The two guide rods 42 extend towards the mounting bracket 29 and pass through the third through holes 300 respectively. The two threaded guide sleeves 44 are screwed onto the surfaces of the two guide rods 42 passing through the third through holes 300. The two threaded guide sleeves 44 are provided with internal threads and are threadedly connected to the guide rods 42. The two guide rods 42 between the pressure block 43 and the mounting bracket 29 are also fitted with telescopic springs 45. The fixing bolt 41 keeps the position of the middle position of the pressure block 43 and the position of the mounting bracket 29 unchanged. However, the gap between the two ends of the pressure block 43 and the automotive floor assembly to be welded does not fully meet the welding requirements. Therefore, the gap between the end face of each pressure block 43 and the automotive floor assembly can be checked by feeler gauge or feeler gauge. If the gap is too large, the threaded guide sleeve on the corresponding side of the corresponding pressure block 43 needs to be rotated to adjust the degree of compression of the pressure block 43 by the telescopic spring 45 so that the gap meets the welding requirements. After checking the gap of each floating pressing device 4's pressure block 43 in turn, laser welding can be performed.

[0047] Further as Figure 3 As shown, as a further improvement of this embodiment, the pressure block 43 includes a first stop 431, a second stop 432, a third stop 433, and a step portion 434. The first stop 431 and the second stop 432 are parallel and spaced apart. The third stop 433 is fixedly connected to the adjacent ends of the first stop 431 and the second stop 432. The step portion 434 is located at the edge of the end of the first stop 431, the third stop 433, and the second stop 432 away from the vehicle floor assembly, and extends outward toward the first stop 431, the third stop 433, and the second stop 432. The fixing bolt 41 and the two guide rods 42 are spaced apart at different positions on the step portion 434. The area between the first stop 431, the second stop 432, and the third stop 433 can be a rounded rectangular area, which can serve as a reference boundary for the weld seam in laser welding.

[0048] See attached document Figure 4 The gap area between the first stop 431, the second stop 432, and the third stop 433 does not coincide with the projection of the mounting bracket 29 on the horizontal plane. This vertical non-obstruction ensures that the mounting bracket 29 will not block the movement trajectory of the laser welding process during subsequent welding.

[0049] like Figure 5 and Figure 6 As shown, several auxiliary pressing mechanisms 3 are respectively arranged at both ends of the base 1 extending along the axial direction of the rotation axis 22; a horizontal positioning block 11 is provided on the base 1, which extends upward and outward to facilitate the installation of the components of the auxiliary pressing mechanism 3; each of the auxiliary pressing mechanisms 3 includes a fourth linear drive mechanism 31, two first swing arms 32, two second swing arms 33, and a floating block 34. The movable end of the fourth linear drive mechanism 31 is hinged to the base 1, the two first swing arms 32 are arranged in parallel, and the horizontal positioning block 11 and the floating block 34 are both located within the gap between the two first swing arms 32. The floating block 34 and the horizontal positioning block 11 are... The end away from the car floor assembly is hinged; both first swing arms 32 include a first end 32a, a second end 32b and a third end 32c. The first end 32a of the two first swing arms 32 is hinged to the base 1, the second end 32b extends outward in a direction away from the ground, and the third end 32c extends outward horizontally in a direction away from the car floor assembly. The third end 32c of both first swing arms 32 is hinged to the movable end of the fourth linear drive mechanism 31. The second end 32b of the first swing arm 32 is hinged to one end of the second swing arm 33, and the other end of the second swing arm 33 is hinged to the non-end position of the floating block 34.

[0050] When the movable end of the fourth linear drive mechanism 31 extends, it pushes the third end 32c of the two first swing arms 32 upward, further driving the two first swing arms 32 to rotate relative to the hinge point between the first end 32a and the horizontal positioning block 11 towards the pressure arm 24. The second end 32b of the two first swing arms 32 drives the second swing arm 33 to move downward, thereby causing the non-hinged end of the floating block 34 to press against the end face of the pressure arm 24, stabilizing the current position of the pressure arm. Conversely, when the movable end of the fourth linear drive mechanism 31 resets downward, it drives the two first swing arms 32 to rotate relative to the hinge point between the first end 32a and the horizontal positioning block 11 away from the pressure arm 24. At this time, the second swing arm 33 drives the floating block 34 to separate from the pressure arm 24, releasing the position locking relationship of the pressure arm 24.

[0051] In this invention, each linear drive mechanism can be implemented using a linear movement mechanism such as a cylinder, hydraulic cylinder, or electric push rod. To improve positioning accuracy, a marker can be further set on the positioning part 28, and a proximity switch can be set on the fixed base 21. When the proximity switch is triggered, it drives the second linear drive mechanism 27 or the auxiliary clamping mechanism 3 to operate / reset. Further details are omitted here.

[0052] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A clamping device for laser welding of automotive flooring, characterized in that, include: Base (1), for placing the automotive floor assembly to be welded; A rotary clamping mechanism (2) is set on one side of the base (1). The fixed end of the rotary clamping mechanism (2) is fixed relative to the base (1), and the movable end rotates relative to the fixed end and abuts against the surface of the non-welded position of the automotive floor assembly. Several auxiliary clamping mechanisms (3) are provided on the side of the base (1) for locking the position of the movable end of the rotary clamping mechanism (2) that abuts against the car floor assembly; Several floating clamping devices (4) are set at the movable end of the rotary clamping mechanism (2) to clamp the area where the weld of the car floor assembly is located. The clamping force of the several floating clamping devices (4) on the car floor assembly is independently adjustable.

2. The clamping device for laser welding of automotive flooring according to claim 1, characterized in that, The rotary pressing mechanism (2) includes two fixed bases (21), a rotating shaft (22), a connecting rod (23), a pressure arm (24), and a first linear drive mechanism (25); the two fixed bases (21) are opposite to each other and spaced apart, and the rotating shaft (22) passes through the ends of the two fixed bases (21) away from the ground, and the rotating shaft (22) is rotatably connected to the two fixed bases (21); the rotating shaft (22) is provided with a connecting rod (23) and a pressure arm (24), and one end of the connecting rod (23) and one end of the pressure arm (24) are respectively fixed to the rotating shaft (22). The connecting rod (23) and the pressure arm (24) are both arranged to extend radially along the rotation axis (22), and the connecting rod (23) and the pressure arm (24) are arranged at an angle. The first linear drive mechanism (25) is fixed relative to the ground. The movable end of the first linear drive mechanism (25) is hinged to the end of the connecting rod (23) away from the rotation axis (22). The first linear drive mechanism (25) drives the rotation axis (22) to rotate relative to the two fixed bases (21), so that the pressure arm (24) rotates and abuts against or separates from the car floor assembly.

3. A clamping device for laser welding of automotive flooring according to claim 2, characterized in that, The length of the connecting rod (23) extending radially along the rotation axis (22) is less than the length of the pressure arm (24) extending radially along the rotation axis (22); a counterweight (26) is also provided on the connecting rod (23), and the counterweight (26) is fixedly connected to the connecting rod (23).

4. A clamping device for laser welding of automotive flooring according to claim 3, characterized in that, A second linear drive mechanism (27) is provided on each of the two fixed bases (21). The central axis of the movable end of the second linear drive mechanism (27) is parallel to the central axis of the rotating shaft (22). A positioning part (28) is fixedly provided on the rotating shaft (22). The positioning part (28) extends outward in a direction away from the rotating shaft (22). One end of the positioning part (28) is fixedly connected to the pressure arm (24). The other end of the positioning part (28) is in the same direction as the extension of the connecting rod (23). A first through hole (100) is also provided on the side where the other end of the positioning part (28) is located. The shape of the first through hole (100) matches the shape of the movable end of the second linear drive mechanism (27). The movable end of the second linear drive mechanism (27) is used to insert into the first through hole (100) to lock the initial position of the rotating shaft (22).

5. A clamping device for laser welding of automotive flooring according to claim 2, characterized in that, The pressure arm (24) is fixedly provided with a mounting bracket (29) on the side near the car floor assembly. The mounting bracket (29) is arranged along the extension direction of the rotation axis (22). A plurality of floating pressing devices (4) are arranged in an array on the mounting bracket (29). The plurality of floating pressing devices (4) extend toward the direction near the car floor assembly. The gap between the two ends of the plurality of floating pressing devices (4) near the car floor assembly and the car floor assembly is adjustable.

6. A clamping device for laser welding of automotive flooring according to claim 5, characterized in that, Several floating clamping devices (4) each include a fixing bolt (41), two guide rods (42), a pressure block (43), two threaded guide sleeves (44), and a telescopic spring (45). The mounting bracket (29) is provided with several second through holes (200) and several third through holes (300). The pressure block (43) is parallel to and spaced apart from the mounting bracket (29). One end of the fixing bolt (41) is connected to the pressure block (43), and the other end of the fixing bolt (41) passes through the second through hole (200) and is securely connected to the mounting bracket (29). Two guide rods (42) are respectively provided at the edge. The surfaces of the two guide rods (42) are provided with external threads. The two guide rods (42) extend towards the mounting bracket (29) and pass through the third through hole (300) respectively. Two threaded guide sleeves (44) are screwed onto the surfaces of the two guide rods (42) that pass through the third through hole (300). The two threaded guide sleeves (44) are provided with internal threads. The threaded guide sleeves (44) are threadedly connected to the guide rods (42). A telescopic spring (45) is also sleeved on the two guide rods (42) between the pressure block (43) and the mounting bracket (29).

7. A clamping device for laser welding of automotive flooring according to claim 6, characterized in that, The pressure block (43) includes a first stop (431), a second stop (432), a third stop (433), and a step (434). The first stop (431) and the second stop (432) are parallel and spaced apart. The third stop (433) is fixedly connected to the adjacent ends of the first stop (431) and the second stop (432). The step (434) is located at the edge of the end of the first stop (431), the third stop (433), and the second stop (432) away from the vehicle floor assembly, and extends outward toward the first stop (431), the third stop (433), and the second stop (432). The fixing bolt (41) and the two guide rods (42) are spaced apart at different positions on the step (434).

8. A clamping device for laser welding of automotive flooring according to claim 7, characterized in that, The gap area between the first stop (431), the second stop (432), and the third stop (433) does not coincide with the projection of the mounting bracket (29) on the horizontal plane.

9. A clamping device for laser welding of automotive flooring according to claim 5, characterized in that, The pressure arm (24) is also provided with a plurality of third linear drive mechanisms (210) arranged in an array on the side near the car floor assembly. The fixed ends of the plurality of third linear drive mechanisms (210) are fixedly connected to the pressure arm (24), and the movable ends of the plurality of third linear drive mechanisms (210) abut against the surface of the non-welded position of the car floor assembly.

10. A clamping device for laser welding of automotive flooring according to claim 2, characterized in that, Several auxiliary pressing mechanisms (3) are respectively set at both ends of the base (1) extending along the axial direction of the rotation axis (22); a horizontal positioning block (11) is provided on the base (1); each of the several auxiliary pressing mechanisms (3) includes a fourth linear drive mechanism (31), two first swing arms (32), two second swing arms (33) and a floating block (34). The movable end of the fourth linear drive mechanism (31) is hinged to the base (1), the two first swing arms (32) are arranged in parallel, the horizontal positioning block (11) and the floating block (34) are both located in the gap between the two first swing arms (32), and the floating block (34) is hinged to the end of the horizontal positioning block (11) away from the car floor assembly. Both first swing arms (32) include a first end (32a), a second end (32b) and a third end (32c). The first end (32a) of both first swing arms (32) is hinged to the base (1), the second end (32b) extends outward in a direction away from the ground, and the third end (32c) extends outward horizontally in a direction away from the car floor assembly. The third end (32c) of both first swing arms (32) is hinged to the movable end of the fourth linear drive mechanism (31). The second end (32b) of the first swing arm (32) is hinged to one end of the second swing arm (33), and the other end of the second swing arm (33) is hinged to the non-end position of the floating block (34).

Images