CN224088288U - Bending arm welding fixture - Google Patents

Abstract

The utility model discloses a bent arm welding tool, belongs to the field of welding auxiliary facilities, and aims to improve welding efficiency and accuracy. The vehicle door connecting device comprises a base, wherein a first limiting structure for supporting and limiting the first position of a connecting rod, a second limiting structure for supporting and limiting the position of an upper bent arm, a third limiting structure for supporting and limiting the position of a lower bent arm, a fourth limiting structure for supporting and limiting the position of a connecting shaft on a vehicle door, a fifth limiting structure for supporting and limiting the position of the lower connecting shaft of the vehicle door, and a sixth limiting structure for supporting and limiting the second connecting rod are arranged on the base, and the relative position relation among the first connecting rod, the upper connecting shaft of the vehicle door, the lower connecting shaft of the vehicle door, the upper bent arm, the lower bent arm and the second connecting rod meets the requirement of a bent arm assembly after the first connecting rod, the upper connecting shaft of the vehicle door, the upper bent arm, the lower bent arm and the second connecting rod are in place. Therefore, after all the parts forming the arm assembly are mounted on the bent arm welding tool at one time, the construction of all the welding seams can be completed at one time, so that all the welding seams are based on the same welding standard, the consistency of the welding seams of all the welding seams is ensured, and the quality of a finished product of the bent arm assembly is ensured.

Description

Bent arm welding tool

Technical Field

The utility model belongs to the field of welding auxiliary facilities, and particularly relates to a bent arm welding tool.

Background

The door bending arm assembly in the passenger car is one of key components in a passenger car door system, is mainly used for connecting a car door and a car body, supporting the opening and closing movement of the car door and ensuring the stability and the safety of the car door in the running process. Fig. 1 discloses a passenger car middle door bent arm assembly structure, which comprises a lower bent arm 101, an upper bent arm 102, a first connecting rod 103, a second connecting rod 104, a vehicle door upper connecting shaft 106 and a vehicle door lower connecting shaft 105, wherein the components are welded into the bent arm assembly 1.

The two ends of the first connecting rod 103 are respectively provided with a connecting shaft head 103A, one connecting shaft head 103A is used for installing an upper vehicle body support, the other connecting shaft head 103A is used for installing a lower vehicle body support, the lower bent arm 101 and the upper bent arm 102 are respectively provided with an arc section 101A close to a vehicle body, a bent section 101B close to a vehicle door and a straight line section 101C for connecting the arc section 101A and the bent section 101B, the lower vehicle door connecting shaft 105 is a stepped shaft and comprises a lower large shaft section 105A, a lower middle shaft section 105B and a lower small shaft section 105C, a plane is machined on the lower small shaft section 105C along the axial direction of the lower connecting shaft, the lower large shaft section 105A is connected with the bent section 101B of the lower bent arm 101 through a welding line, the upper connecting shaft 106 is a stepped shaft and comprises an upper large shaft section 106A and an upper middle shaft section 106B, the upper large shaft section 106A is connected with the bent section 101B of the upper bent arm 102 through a welding line, one end of the connecting rod 104 is parallel to the first 103, the straight line section 101C of the upper bent arm 102 is connected with the straight line section 101C of the upper bent arm 102 through the welding line section 103, the other end of the lower connecting rod 103 is connected with the straight line section 101C of the lower bent arm 101 through the welding line section 101A through the welding line section 108, the lower connecting rod 101A is parallel to the arc section 101A of the connecting rod 101A, and the welding line section 107 is connected with the lower connecting rod 101A is parallel to the arc section 101A through the welding line section of the lower connecting rod 101A.

The bent arm assembly is provided with a plurality of welding seams, at present, no special auxiliary welding tool is used for clamping the rod components, two components are fixedly welded on a welding operation table during welding, and a structure welded in the prior art is welded with other components as a whole until the construction of all the welding seams is completed.

Disclosure of utility model

The utility model aims to provide a bent arm welding tool which is used for fixing all parts forming a bent arm assembly, realizing simultaneous welding of all parts and improving welding efficiency and precision.

The technical proposal adopted by the utility model is that a bent arm welding tool,

Comprises a base;

the base is provided with:

A first limit structure for supporting and limiting the first position of the connecting rod;

A limiting structure II for supporting and limiting the position of the upper bent arm;

a third limit structure for supporting and limiting the position of the lower bent arm;

A limiting structure IV for supporting and limiting the position of the connecting shaft on the vehicle door;

a limiting structure V for supporting and limiting the position of the lower connecting shaft of the vehicle door;

A limiting structure six for supporting and limiting the connecting rod II;

When the first connecting rod is positioned in the first limiting structure, the upper connecting shaft of the vehicle door is positioned in the fourth limiting structure, the lower connecting shaft of the vehicle door is positioned in the fifth limiting structure, the upper bent arm is positioned in the second limiting structure, and the second connecting rod is positioned in the sixth limiting structure, the relative position relationship among the first connecting rod, the upper connecting shaft of the vehicle door, the lower connecting shaft of the vehicle door, the upper bent arm and the lower bent arm meets the requirement of the bent arm assembly.

The base comprises a horizontal bottom frame, a first supporting beam for installing a first limiting structure and a second supporting beam for installing a second limiting structure and a third limiting structure, wherein the first supporting beam is supported on the bottom frame through upright posts at the bottoms of two ends of the first supporting beam, and the second supporting beam is supported on the bottom frame through upright posts at the bottoms of two ends of the second supporting beam.

Further, the first limiting structure comprises end brackets for supporting the connecting shaft heads at two ends of the connecting rod, the end brackets are provided with V-shaped grooves for clamping the connecting shaft heads, and the end surfaces of the two ends of the connecting rod are abutted against the limiting end surfaces of the two sets of end brackets;

and the outer sides of the end brackets are respectively provided with a pressing device along the transverse direction, a pressing head of the pressing device centers the end brackets above the end brackets, and after the connecting shaft heads are supported on the end brackets, the pressing head of the pressing device presses the connecting shaft heads.

Further, two sets of limiting claws are transversely arranged, each limiting claw comprises a mounting seat and a claw arm, the mounting seat is mounted on the base, one end of each claw arm is hinged to the mounting seat, the other end of each claw arm extends upwards and is bent forwards to the upper side of the connecting rod, one set of claw arms resists the lower bent arm from the right side of the lower bent arm, and the other set of claw arms resists the upper bent arm from the left side of the upper bent arm.

Further, the second limiting structure and the third limiting structure comprise a first clamp for locking the straight line section and a second clamp for locking the bending section.

The clamp comprises a clamp body, a base, a clamp body, a clamp plate and a straight line section, wherein the clamp body comprises a clamp block I and a clamp plate I, the clamp block I comprises a connecting section used for being connected with the base and a lifting section used for supporting the straight line section, the lifting section comprises a bottom lifting plane and a lateral limiting plane, the bottom lifting plane is obliquely arranged and has the same inclination as the straight line section, the clamp plate I is arranged on the opposite side of the lateral limiting plane, and the clamp plate I clamps the straight line section oppositely to the lateral limiting plane.

Further, the first clamping plate is movably arranged on the first clamping block in the longitudinal direction, and when the first clamping plate moves to the limit position in the longitudinal direction, the front end of the first clamping plate is positioned at the rear side of the bottom lifting plane in the longitudinal direction.

Furthermore, a strip-shaped hole extending longitudinally is formed in the first clamping plate, a threaded rod is fixed to the side face of the first clamping block, and the threaded rod penetrates through the strip-shaped hole and then is connected with the adjusting nut.

Further, the connecting section of the first clamping block is of a square pipe structure;

The second limiting structure further comprises a support for lifting the arc section of the upper bent arm, the support is L-shaped, the horizontal section of the support is inserted into the cavity of the connecting section, and the top end of the vertical section supports the arc section.

Further, the third limiting structure further comprises a support column for supporting the limiting shaft, the top end of the support column comprises a vertical plate and a horizontal plate, the horizontal plate is provided with a cushion block, the limiting shaft is arranged in a limiting groove of the cushion block, the vertical plate is provided with an adjusting through hole for installing an adjusting rod, the adjusting rod passes through the adjusting through hole to abut against the end face of the limiting shaft, the inner side of the horizontal plate is provided with a limiting plate matched with the inclination of a connecting pipe, the connecting pipe abuts against the limiting plate, and the bottom end of the connecting pipe is supported on the horizontal plate.

Further, the second clamp comprises a second clamp block and a second clamp plate, the second clamp block is arranged on the base, the second clamp plate is detachably connected to the second clamp block, and the second clamp plate and the second clamp block clamp the bending section.

The limiting structure comprises an L-shaped upper positioning block, a limiting screw rod, a base, a step surface of the upper positioning block, a limiting screw rod, a plurality of connecting rods and a plurality of connecting rods, wherein the upper positioning block is provided with a jack which is transversely communicated with an upper middle shaft section and a slot which is matched with an upper large shaft section;

A pressing device is arranged on the front side of the upper positioning block in the longitudinal direction, and when the upper connecting shaft of the vehicle door is positioned behind the upper positioning block, a pressing head of the pressing device presses down the upper large shaft section.

Further, the limiting structure five comprises a step-type lower positioning block,

The second step surface of the lower positioning block is provided with a stepped limiting groove matched with the lower large shaft section and the lower middle shaft section, and when the lower positioning block works, the lower large shaft section and the lower middle shaft section are inserted into the limiting groove, and the step surface of the limiting groove abuts against the step surface between the lower large shaft section and the lower middle shaft section;

A limiting block is arranged on the first ladder step surface of the lower positioning block, and the rear side surface of the limiting block is attached to the plane of the lower small shaft section;

A pressing device is arranged on the front side of the lower positioning block in the longitudinal direction, and when the lower connecting shaft of the vehicle door is positioned on the lower positioning block, a lower pressing head of the pressing device presses down the large shaft section.

Further, the limiting structure six comprises two support blocks and a pressing device which are transversely arranged along the base, and when the second connecting rod is located in the groove of the support block, a pressing head of the pressing device presses the second connecting rod.

The bent arm welding tool disclosed by the utility model has the beneficial effects that the first connecting rod, the upper bent arm, the lower bent arm, the upper connecting shaft of the vehicle door, the lower connecting shaft of the vehicle door, the connecting rod and the like which form the bent arm assembly can be limited through the corresponding limiting structures, so that the relative positions of the components meet the requirements of a finished bent arm assembly after the bent arm welding tool is positioned, and therefore, the construction of all welding seams can be completed once after all the components forming the bent arm assembly are mounted to the bent arm welding tool, the construction of all the welding seams is based on the same welding standard, the consistency of the welding seams of all the welding seams is ensured, and the finished quality of the bent arm assembly is ensured by utilization of the welding seam. In addition, the whole process does not need frequent adjustment of the positions of the components, so that the adjustment time is saved.

Drawings

FIG. 1 is a schematic view of a flexure arm assembly;

FIG. 2 is a schematic diagram of a bent arm welding fixture disclosed by the utility model;

FIG. 3 is a schematic view of a structure of the clamp;

FIG. 4 is a schematic view of the structure of the lower positioning block;

FIG. 5 is a schematic diagram of a four-part limiting structure;

FIG. 6 is a schematic view of the structure of the components of the positioning crimping arm assembly using the crimping arm welding tool;

FIG. 7 is a front view of FIG. 6;

FIG. 8 is a top view of FIG. 6;

FIG. 9 is a left side view of FIG. 6;

Fig. 10 is a right side view of fig. 6.

In the drawing, a bent arm assembly 1, a lower bent arm 101, an arc section 101A, a bent section 101B, a straight line section 101C, an upper bent arm 102, a first connecting rod 103, a connecting shaft head 103A, a second connecting rod 104, a door lower connecting shaft 105, a lower large shaft section 105A, a lower middle shaft section 105B, a lower small shaft section 105C, a door upper connecting shaft 106, an upper large shaft section 106A, an upper middle shaft section 106B, a limiting shaft 107, a connecting pipe 108, a limiting structure one 3, an end bracket 301, a limiting claw 302, a mounting seat 3021, a claw arm 3022, a limiting structure two 4, a clamping block one 401, a connecting section 4011, a lifting section 4012, a bottom lifting plane 4013, a lateral limiting plane 4014, a clamping plate one 402, a strip hole 4021, a threaded rod 403, an adjusting nut 404, a bracket 405, a clamping block two 406, a clamping plate two 407, a limiting structure three 5, a supporting column 501, a vertical plate 1, a horizontal plate 5012, an adjusting through hole 3, a cushion block 502, a limiting plate 503, a limiting structure four 6, an upper positioning block 601, a step face 6011, a 6012, a jack 6012, a lower lug 602, a limiting block 707, a limiting device 702, a limiting device five-shaped block seat 708, a limiting device 702, a limiting device lower positioning block position fixing device fixing one 11, and a plurality of blocks.

Detailed Description

The utility model is further illustrated in the following figures and examples, in which:

In the present utility model, the terms "longitudinal", "transverse", "vertical", "upper", "front", "rear", "vertical", "horizontal", "top", "bottom", etc. indicate an azimuth or positional relationship based on that shown in fig. 2. It is used solely for the convenience of description and does not infer or suggest that the device or element in question must be oriented, configured and operated in a specific orientation, and therefore should not be construed as limiting the utility model.

Bent arm welding fixture, as shown in fig. 2, including base 2, be provided with on the base 2:

A first limit structure 3 for supporting and limiting the position of the first connecting rod 103;

A second limiting structure 4 for supporting and limiting the position of the upper bent arm 102;

a third limit structure 5 for supporting and limiting the position of the lower bent arm 101;

a fourth limit structure 6 for supporting and limiting the position of the connecting shaft 106 on the vehicle door;

a fifth limit structure 7 for supporting and limiting the position of the lower door connecting shaft 105;

a limit structure six 8 for supporting and limiting the connecting rod two 104;

as shown in fig. 6 to 10, when the first connecting rod 103 is located in the first limiting structure 3, the upper door connecting shaft 106 is located in the fourth limiting structure 6, the lower door connecting shaft 105 is located in the fifth limiting structure 7, the upper bent arm 102 is located in the second limiting structure 4, the lower bent arm 101 is located in the third limiting structure 5, and the second connecting rod 104 is located in the sixth limiting structure 8, the relative positional relationship among the first connecting rod 103, the upper door connecting shaft 106, the lower door connecting shaft 105, the upper bent arm 102, the lower bent arm 101 and the second connecting rod 104 satisfies the requirement of the bent arm assembly 1.

The first connecting rod 103, the upper bent arm 102, the lower bent arm 101, the upper connecting shaft 106 of the vehicle door, the lower connecting shaft 105 of the vehicle door, the second connecting rod 104 and other components forming the bent arm assembly 1 can be limited through the corresponding limiting structures, so that the relative positions of the components meet the requirements of the finished bent arm assembly 1 after the bent arm assembly 1 is positioned, and therefore, after all the components forming the finished arm assembly 1 are mounted to the bent arm welding tool, the construction of all welding seams can be completed at one time, the construction of all the welding seams is based on the same welding standard, the consistency of the welding seams of all the welding seams is ensured, and the quality of the finished bent arm assembly 1 is ensured by utilizing the guarantee of the finished product quality of the bent arm assembly 1. In addition, the whole process does not need frequent adjustment of the positions of the components, so that the adjustment time is saved.

As shown in fig. 1, the base 2 includes a horizontal bottom frame 201, a first supporting beam 202 for mounting the first limiting structure 3, and a second supporting beam 203 for mounting the second limiting structure 4 and the third limiting structure 5, where the first supporting beam 202 is supported by the bottom frame 201 through the upright posts at the bottoms of the two ends of the first supporting beam, and the second supporting beam 203 is supported by the bottom frame 201 through the upright posts at the bottoms of the two ends of the second supporting beam. The frame type base 2 enclosed by the cross beam, the upright post and the like has the advantages of simple structure, light weight and material saving.

The first limiting structure 3 comprises end brackets 301 for supporting the connecting shaft heads 103A at two ends of the first connecting rod 103, wherein the end brackets 301 are provided with V-shaped grooves for clamping the connecting shaft heads 103A, and the end surfaces of the two ends of the first connecting rod 103 are abutted against the limiting end surfaces of the two sets of end brackets 301;

The pressing devices 9 are respectively arranged outside the end brackets 301 along the transverse direction, the pressing heads of the pressing devices 9 center the end brackets 301 above the end brackets 301, and after the connecting shaft heads 103A are supported on the end brackets 301, the pressing heads of the pressing devices 9 press the connecting shaft heads 103A.

The first connecting rod 103 is clamped in the V-shaped groove, and the V-shaped groove plays a limiting role on the first connecting rod 103 in the longitudinal direction, so that the first connecting rod 103 is prevented from moving in the longitudinal direction.

The right end face of the end bracket 301 at the left end is a limiting end face thereof in the transverse direction, the left end face of the end bracket 301 at the right end is a limiting end face thereof, the end faces at the two ends of the first connecting rod 103 are end faces of the first connecting rod 103, which are in contact with the connecting shaft head 103A, the two ends of the first connecting rod 103 are clamped between the right end face of the end bracket 301 at the left end and the left end face of the end bracket 301 at the right end, the first connecting rod 103 is limited in the axial direction, and the first connecting rod 103 is prevented from moving in the transverse direction, namely, the axial direction of the first connecting rod 103.

When the first connecting rod 103 is in place in the end bracket 301, the first connecting rod 103 is completely locked by pressing down the connecting stub shaft 103A by the pressing device 9, preventing the first connecting rod 103 from moving.

In order to avoid bending of the first connecting rod 103 due to suspension, a middle supporting block can be arranged in the middle of the first connecting rod 103 and fixed on the base 2, and when in use, the first connecting rod 103 is directly placed on the middle supporting block.

Of course, the first limiting structure 3 may also adopt a pair of oppositely arranged ejector rods, and the first connecting rod 103 is tightly pushed from the two ends of the first connecting rod 103 along the axial direction of the first connecting rod 103 by the pair of ejector rods.

In order to further limit the first connecting rod 103, two sets of limiting claws 302 are preferably arranged along the transverse direction, the limiting claws 302 comprise mounting seats 3021 and claw arms 3022, the mounting seats 3021 are mounted on the base 2, one ends of the claw arms 3022 are hinged to the mounting seats 3021, and the other ends extend upwards and are bent forwards above the first connecting rod 103. And the first connecting rod 103 is limited by the two sets of limiting claws 302, so that the risk of deformation joints caused by welding is further reduced. One set of claw arms 3022 resists the lower bent arm 101 from the right side of the lower bent arm 101, the other set of claw arms 3022 resists the upper bent arm 102 from the left side of the upper bent arm 102, and the claw arms also play a certain limiting role on the lower bent arm 101 and the upper bent arm 102 in the welding process, so that the risk that the upper bent arm 102 or the lower bent arm 101 deflects and deforms along the axial direction of the first connecting rod 103 due to welding is reduced.

Preferably, the second limiting structure 4 and the third limiting structure 5 comprise a first clamp for locking the straight line segment 101C and a second clamp for locking the bending segment 101B. The first clamp and the second clamp are limited at a plurality of positions along the extending direction of the upper bent arm 102 or the lower bent arm 101, so that the stability and the reliability of clamping the upper bent arm 102 or the lower bent arm 101 are improved.

The clamp I comprises a clamp block I401 and a clamp plate I402, wherein the clamp block I401 comprises a connecting section 4011 used for being connected with a base 2 and a lifting section 4012 used for supporting a straight line section 101C, the lifting section 4012 comprises a bottom lifting plane 4013 and a lateral limiting plane 4014, the bottom lifting plane 4013 is obliquely arranged and has the same inclination as that of the straight line section 101C, the lifting plane 4013 lifts the straight line section 101C from the lower side of the straight line section 101C, the clamp plate I402 is arranged on the opposite side of the lateral limiting plane 4014, and the clamp plate I402 clamps the straight line section 101C opposite to the lateral limiting plane 4014.

The clamp plate one 402 can be directly clamped on the clamp block one 401 by a fastening screw. In use, first, the first clamping plate 402 is loosened, the straight section 101C is placed on the bottom lifting plane 4013, and then the fastening screw is tightened again to push the first clamping plate 402 toward the lateral limiting plane 4014 to clamp the straight section 101C.

To facilitate insertion of straight section 101C while avoiding removal of clamp one 402 from clamp one 401, preferably,

The first clamping plate 402 is longitudinally movably mounted on the first clamping block 401, and when the first clamping plate 402 is longitudinally moved back to the limit position, the front end of the first clamping plate 402 is longitudinally positioned at the rear side of the bottom lifting plane 4013.

The movable connection between the clamping plate I402 and the clamping block I401 can be realized in the form of a sliding groove sliding block, in the embodiment, a strip-shaped hole 4021 extending longitudinally is arranged on the clamping plate I402, a threaded rod 403 is fixed on the side surface of the clamping block I401, and the threaded rod 403 penetrates through the strip-shaped hole 4021 and then is connected with an adjusting nut 404. The structure is simple, and the processing is convenient.

Preferably, the connecting section 4011 of the first clamping block 401 is a square tube structure, the second limiting structure 4 further comprises a bracket 405 for lifting the arc section 101A of the upper bent arm 102, the bracket 405 is L-shaped, a horizontal section of the bracket 405 is inserted into a cavity of the connecting section 4011, and the top end of the vertical section supports the arc section 101A. The support 405 adds a support to the arc segment 101A, which is more beneficial to ensure the stability of the upper curved arm 102. The bracket 405 is inserted into the connecting section 4011 and then connected to the base 2 through a bolt, so that the structure of the second limiting structure 4 is more compact.

In order to complete the welding of the limiting shaft 107 and the connecting pipe 108 at the same time, preferably, the third limiting structure 5 further comprises a supporting column 501 supporting the limiting shaft 107, the top end of the supporting column 501 comprises a vertical plate 5011 and a horizontal plate 5012, a cushion block 502 is arranged on the horizontal plate 5012, the limiting shaft 107 is arranged in a limiting groove of the cushion block 502, an adjusting through hole 5013 for installing an adjusting rod is arranged on the vertical plate 5011, the adjusting rod passes through the adjusting through hole 5013 to abut against the end face of the limiting shaft 107, a limiting plate 503 adapting to the inclination of the connecting pipe 108 is arranged on the inner side of the horizontal plate 5012, and the connecting pipe 108 abuts against the limiting plate 503 and the bottom end of the connecting pipe is supported on the horizontal plate 5012.

The second clamp comprises a second clamping block 406 and a second clamping plate 407, the second clamping block 406 is arranged on the base 2, the second clamping plate 407 is detachably connected to the second clamping block 406, and the second clamping plate 407 and the second clamping block 406 clamp the bending section 101B oppositely.

A semicircular hoop can be used as a limiting structure IV 6 to encircle and fix the connecting shaft 106 on the vehicle door on the base 2. In this embodiment, as shown in fig. 5, the fourth limit structure 6 includes an L-shaped upper positioning block 601, a jack 6012 penetrating the upper middle shaft section 106B in a transverse direction and a slot 6013 adapted to the upper large shaft section 106A are provided on the upper positioning block 601, the jack 6012 is coaxial with the slot 6013, a limit screw 602 is provided on the right side of the upper positioning block 601, the limit screw 602 is mounted on the base 2 via an ear seat 603, and the step surface 6011 of the upper positioning block 601 and the limit screw 602 clamp the upper large shaft section 106A relatively along the axial direction of the upper large shaft section 106A, so that the position of the upper connecting shaft 106 on the vehicle door is determined.

A pressing device 9 is arranged on the front side of the upper positioning block 601 in the longitudinal direction, and when the upper connecting shaft 106 of the vehicle door is positioned on the upper positioning block 601, a pressing head of the pressing device 9 presses down the large shaft section 106A. The pressing device 9 can fix the upper connecting shaft 106 of the vehicle door and prevent the upper connecting shaft 106 of the vehicle door from rotating.

Similarly, as shown in fig. 4, the fifth limiting structure 7 comprises a lower stepped positioning block 701, a stepped limiting groove 7011 matched with the lower large shaft section 105A and the lower middle shaft section 105B is formed in the second stepped surface of the lower positioning block 701, when the limiting structure works, the lower large shaft section 105A and the lower middle shaft section 105B are inserted into the limiting groove 7011, the stepped surface 6011 of the limiting groove 7011 abuts against the stepped surface between the lower large shaft section 105A and the lower middle shaft section 105B, a limiting block 702 is arranged on the first stepped surface of the lower positioning block 701, and the rear side surface of the limiting block 702 is attached to the plane of the lower small shaft section 105C. This allows the position of the door lower connecting shaft 105 to be determined.

A pressing device 9 is provided on the front side of the lower positioning block 701 in the longitudinal direction, and when the door lower connecting shaft 105 is positioned in the lower positioning block 701, the large shaft section 105A is pressed down by the lower ram of the pressing device 9.

The limiting structure six 8 comprises two support blocks 801 and a pressing device 9 which are transversely arranged along the base 2, and when the second connecting rod 104 is positioned in the groove of the support blocks 801, a pressing head of the pressing device 9 presses the second connecting rod 104. And the limiting structure six 8 can also adopt a hoop structure and the like.

The pressing device 9 disclosed in the present embodiment may be a conventional quick clamp or the like.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. Bent arm welding fixture, its characterized in that:

Comprises a base (2);

The base (2) is provided with:

A first limit structure (3) for supporting and limiting the first position (103) of the connecting rod;

A limiting structure II (4) for supporting and limiting the position of the upper bent arm (102);

A third limiting structure (5) for supporting and limiting the position of the lower bent arm (101);

A fourth limit structure (6) for supporting and limiting the position of the connecting shaft (106) on the vehicle door;

a fifth limit structure (7) for supporting and limiting the position of the lower connecting shaft (105) of the vehicle door;

And a limit structure six (8) for supporting and limiting the connecting rod two (104);

When the connecting rod I (103) is positioned in the limiting structure I (3), the upper connecting shaft (106) of the vehicle door is positioned in the limiting structure IV (6), the lower connecting shaft (105) of the vehicle door is positioned in the limiting structure V (7), the upper bent arm (102) is positioned in the limiting structure II (4), the lower bent arm (101) is positioned in the limiting structure III (5), the connecting rod II (104) is positioned in the limiting structure V (8), the relative position relationship among the connecting rod I (103), the upper connecting shaft (106) of the vehicle door, the lower connecting shaft (105) of the vehicle door, the upper bent arm (102), the lower bent arm (101) and the connecting rod II (104) meets the requirement of the bent arm assembly (1).

2. The bent arm welding fixture according to claim 1, wherein the limiting structure I (3) comprises end brackets (301) for supporting the connecting shaft heads (103A) at two ends of the connecting rod I (103), the end brackets (301) are provided with V-shaped grooves for clamping the connecting shaft heads (103A), and the end surfaces of the two ends of the connecting rod I (103) are abutted against the limiting end surfaces of the two sets of end brackets (301);

And the outer sides of the end brackets (301) are respectively provided with a pressing device (9) along the transverse direction, the pressing heads of the pressing devices (9) center the end brackets (301) above the end brackets (301), and after the connecting shaft heads (103A) are supported on the end brackets (301), the pressing heads of the pressing devices (9) press the connecting shaft heads (103A).

3. The bent arm welding fixture according to claim 2, wherein two sets of limiting claws (302) are arranged transversely, each limiting claw (302) comprises a mounting seat (3021) and a claw arm (3022), each mounting seat (3021) is mounted on the base (2), one end of each claw arm (3022) is hinged to each mounting seat (3021), the other end of each claw arm extends upwards and is bent forwards above the corresponding connecting rod one (103), one claw arm (3022) withstands the lower bent arm (101) from the right side of the lower bent arm (101), and the other claw arm (3022) withstands the upper bent arm (102) from the left side of the upper bent arm (102).

4. A welding fixture for bent arm as set forth in any one of claims 1-3, wherein the second and third limit structures (4, 5) each comprise a first clamp for locking the straight section (101C) and a second clamp for locking the bent section (101B).

5. The bent arm welding fixture according to claim 4, wherein the first fixture comprises a first clamping block (401) and a first clamping plate (402), the first clamping block (401) comprises a connecting section (4011) used for being connected with the base (2) and a lifting section (4012) used for supporting the straight line section (101C), the lifting section (4012) comprises a bottom lifting plane (4013) and a lateral limiting plane (4014), the bottom lifting plane (4013) is obliquely arranged, and the inclination is consistent with that of the straight line section (101C), the first clamping plate (402) is arranged on the opposite side of the lateral limiting plane (4014), and the straight line section (101C) is clamped by the first clamping plate (402) and the lateral limiting plane (4014) in a relative mode;

the clamp II comprises a clamp block II (406) and a clamp plate II (407), the clamp block II (406) is arranged on the base (2), the clamp plate II (407) is detachably connected with the clamp block II (406), and the clamp block II (407) and the clamp block II (406) clamp the bending section (101B) relatively.

6. The bent arm welding fixture as set forth in claim 5, wherein the first clamping plate (402) is movably mounted on the first clamping block (401) in the longitudinal direction, when the first clamping plate (402) moves to the limit position in the longitudinal direction, the front end of the first clamping plate (402) is located at the rear side of the bottom lifting plane (4013) in the longitudinal direction, a longitudinally extending strip-shaped hole (4021) is formed in the first clamping plate (402), a threaded rod (403) is fixed to the side face of the first clamping block (401), and the threaded rod (403) penetrates through the strip-shaped hole (4021) and then is connected with an adjusting nut (404).

7. The bent arm welding fixture according to claim 5, wherein the connecting section (4011) of the first clamping block (401) is of a square tube structure;

The second limiting structure (4) further comprises a support (405) for lifting the arc section (101A) of the upper bent arm (102), the support (405) is L-shaped, the horizontal section of the support (405) is inserted into the cavity of the connecting section (4011), and the top end of the vertical section supports the arc section (101A).

8. The bent arm welding fixture according to any one of claims 1-3, wherein the limiting structure III (5) further comprises a supporting column (501) supporting the limiting shaft (107), the top end of the supporting column (501) comprises a vertical plate (5011) and a horizontal plate (5012), a cushion block (502) is arranged on the horizontal plate (5012), the limiting shaft (107) is arranged in a limiting groove of the cushion block (502), an adjusting through hole (5013) for installing an adjusting rod is arranged on the vertical plate (5011), the adjusting rod passes through the adjusting through hole (5013) to be abutted against the end face of the limiting shaft (107), a limiting plate (503) matched with the inclination of a connecting pipe (108) is arranged on the inner side of the horizontal plate (5012), the connecting pipe (108) is abutted against the limiting plate (503), and the bottom end of the connecting pipe is supported on the horizontal plate (5012).

9. The bent arm welding fixture as set forth in any one of claims 1-3, wherein the limit structure IV (6) comprises an L-shaped upper positioning block (601), a jack (6012) which is transversely penetrated with the upper middle shaft section (106B) and a slot (6013) which is matched with the upper large shaft section (106A) are arranged on the upper positioning block (601), the jack (6012) is coaxial with the slot (6013), a limit screw (602) is arranged on the right side of the upper positioning block (601), the limit screw (602) is mounted on the base (2) through an ear seat (603), and a step surface (6011) of the upper positioning block (601) and the limit screw (602) axially clamp the upper large shaft section (106A) relatively along the upper large shaft section (106A);

A pressing device (9) is arranged on the front side of the upper positioning block (601) in the longitudinal direction, and when the upper connecting shaft (106) of the vehicle door is positioned on the upper positioning block (601), a pressing head of the pressing device (9) presses down the upper large shaft section (106A).

10. The welding fixture for bent arms according to any one of the claims 1-3, wherein the limiting structure five (7) comprises a stepped lower positioning block (701),

The second stair step surface of the lower positioning block (701) is provided with a stepped limiting groove (7011) which is matched with the lower large shaft section (105A) and the lower middle shaft section (105B), when the stair step surface is in work, the lower large shaft section (105A) and the lower middle shaft section (105B) are inserted into the limiting groove (7011), and the step surface (6011) of the limiting groove (7011) is abutted against the step surface between the lower large shaft section (105A) and the lower middle shaft section (105B);

A limiting block (702) is arranged on the first stair step surface of the lower positioning block (701), and the rear side surface of the limiting block (702) is attached to the plane of the lower small shaft section (105C);

A pressing device (9) is arranged on the front side of the lower positioning block (701) along the longitudinal direction, and when the lower connecting shaft (105) of the vehicle door is positioned on the lower positioning block (701), a large shaft section (105A) is pressed down by a lower pressing head of the pressing device (9).