Positioning clamp for welding of automobile exhaust pipe

Abstract

The utility model relates to an automobile exhaust pipe welding positioning clamp which comprises a base, two mounting seats are arranged on the upper surface of the base, an arc-shaped groove is formed in the upper surface of each mounting seat, a mounting ring is rotationally connected to the inner wall of each arc-shaped groove, and a fixing assembly used for fixing an exhaust pipe is mounted in each mounting ring. Each set of fixing assembly comprises a fixing rod, an upper fixing plate, an air cylinder and a lower fixing plate, a limiting assembly is jointly installed on the installation ring and the installation base, when the automobile exhaust pipe needs to be welded, a worker places the automobile exhaust pipe on the lower fixing plate, the lower fixing plate moves upwards by controlling the air cylinder to be matched with the upper fixing plate and abut against the exhaust pipe, and then the automobile exhaust pipe is welded. In the welding process of the exhaust pipe, a worker rotates the installation base to enable the exhaust pipe to rotate, rotation of the installation ring is limited through the limiting assembly after the installation base rotates to a proper angle, therefore, annular welding is conducted on the connected position, and the welding efficiency of the automobile exhaust pipe is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning fixtures, in particular to a positioning fixture for welding automobile exhaust pipes. Background Art

[0002] Positioning fixture is an important process equipment, which is widely used in various production links such as mechanical manufacturing, processing and assembly. Its main task is to accurately position and fix the workpiece in the production process to ensure the processing accuracy and product quality of the workpiece. As an important part of the automobile emission system, the welding quality of the automobile exhaust pipe directly affects the performance and service life of the exhaust system. In the manufacturing or maintenance process of the exhaust pipe, different sections of pipes need to be welded together, which requires precise positioning of the pipes during the welding process to ensure the uniformity of the weld and the sealing of the joint.

[0003] A Chinese utility model patent with publication number CN213615034U discloses a welding fixture for automobile exhaust pipe, comprising: a base; an intake pipe clamping device vertically mounted on the base, the intake pipe clamping device comprising: a mounting disc, a support column slidably connected to the mounting disc, a clamping assembly fixedly mounted on the support column; an exhaust pipe main body clamping device located on one side of the intake pipe clamping device, and a tail pipe clamping device away from the side of the exhaust pipe main body clamping device.

[0004] With respect to the above-mentioned related technologies, the inventors believe that the following defects exist: during the welding process of the automobile exhaust pipe, circular welding needs to be performed at the connection position. After the above-mentioned positioning fixture clamps the automobile exhaust pipe, it is difficult to rotate the exhaust pipe for welding, which reduces the efficiency of the automobile exhaust pipe welding. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a positioning fixture for welding an automobile exhaust pipe.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions: a positioning fixture for welding automobile exhaust pipes, including a base, two mounting seats are arranged on the upper surface of the base, each of the mounting seats is provided with an arc-shaped groove on the upper surface, each of the arc-shaped groove inner walls is rotatably connected with a mounting ring, each of the mounting rings is installed with a fixing component for fixing the exhaust pipe, each group of the fixing components includes a fixing rod fixed to the inner top wall of the mounting ring, an upper fixing plate fixed to the lower end of the fixing rod, a cylinder fixed to the inner bottom wall of the mounting ring and a lower fixing plate fixed to the end of the piston rod of the cylinder, and a limiting component for limiting the rotation of the mounting ring is jointly installed on the mounting ring and the mounting seat.

[0007] By adopting the above technical solution, when it is necessary to weld the automobile exhaust pipe, the staff will place the automobile exhaust pipe on the lower fixing plate, and control the cylinder to move the lower fixing plate upward to cooperate with the upper fixing plate and press against the exhaust pipe, thereby fixing the exhaust pipe. During the welding process of the exhaust pipe, the staff can rotate the exhaust pipe by rotating the mounting seat, and after rotating it to a suitable angle, limit the rotation of the mounting ring by the limiting assembly, thereby performing annular welding on the connection position, thereby improving the efficiency of automobile exhaust pipe welding.

[0008] Furthermore, the limiting assembly includes a gear fixedly mounted on the mounting ring, a mounting block fixed to the side wall of the mounting seat, a cross bar penetrating the side wall of the mounting block and slidably connected, a limit block fixed to the end of the cross bar and meshing with the gear, and a pulling block fixed to one end of the cross bar away from the limit block.

[0009] By adopting the above technical solution, after the mounting ring and the automobile exhaust pipe are rotated to a suitable angle, the staff engages the limit block with the tooth groove on the gear by pulling the block, thereby limiting the rotation of the mounting ring and reducing the probability of the mounting ring rotating during the welding process.

[0010] Furthermore, a fixing groove is provided on the side wall of the mounting block away from the limiting block, a spring is arranged in the fixing groove, one end of the spring is fixed to the side wall of the pulling block, and the other end of the spring is fixed to the inner wall of the fixing groove.

[0011] By adopting the above technical solution and setting the spring, the pulling block drives the limit block to maintain a state of meshing with the gear under the elastic force of the spring, so that the limit block presses against the gear, reducing the probability of the limit block detaching from the gear and causing the mounting ring to rotate.

[0012] Furthermore, an anti-slip sheet is fixed to the side wall of the limiting block away from the cross bar.

[0013] By adopting the above technical solution, the anti-skid sheet is made of rubber material, and its surface has a large friction coefficient. The limit block cooperates with the gear and presses against the anti-skid sheet, which increases the friction between the limit block and the gear and enhances the stability of the engagement between the limit block and the gear.

[0014] Furthermore, the cross section of the cross bar is rectangular.

[0015] By adopting the above technical solution, the rectangular cross section reduces the probability of the crossbar rotating, thereby reducing the probability of the limit block being out of engagement with the gear due to rotation.

[0016] Furthermore, the side walls of the upper fixing plate and the lower fixing plate on the side close to each other are both provided with rubber pads.

[0017] By adopting the above technical solution, the rubber pad is made of rubber material, and the material has greater friction. The upper fixing plate and the lower fixing plate cooperate with the automobile exhaust pipe and press against the rubber pad, thereby increasing the friction between the upper fixing plate, the lower fixing plate and the automobile exhaust pipe and enhancing the fixing effect of the automobile exhaust pipe.

[0018] Furthermore, a movable groove is provided on the upper surface of the base, and a movable block is fixed to the bottom of each mounting seat and is slidably connected to the inner wall of the groove. A groove connected to the movable groove is provided on the side wall of the base, and a limiting component for limiting the movable block is installed on the movable block. The limiting component includes a screw fixed to the side wall of the movable block and slidably connected to the inner wall of the groove, and a limiting nut sleeved on the screw and threadedly connected.

[0019] By adopting the above technical solution, the distance between the two mounting seats can be adjusted by moving the moving block in the moving groove, thereby facilitating the fixation of exhaust pipes of different lengths. After adjusting the positions of the two mounting seats, the staff needs to tighten the limit nut so that the side wall of the limit nut is pressed against the side wall of the base, thereby limiting the movement of the moving block and reducing the probability of displacement of the mounting seat during welding.

[0020] Furthermore, an annular rubber sheet is sleeved on the screw rod and is located between the limit nut and the base.

[0021] By adopting the above technical solution, the annular rubber sheet is made of rubber material, and its surface has a large friction coefficient. The side wall of the limit nut cooperates with the side wall of the base and presses against the annular rubber sheet, thereby increasing the friction between the side wall of the limit nut and the side wall of the base and reducing the probability of the limit nut rotating.

[0022] In summary, the utility model has the following beneficial effects:

[0023] 1. In the present application, when welding of automobile exhaust pipe is required, the staff places the automobile exhaust pipe on the lower fixing plate, and controls the cylinder to move the lower fixing plate upward to cooperate with the upper fixing plate and press against the exhaust pipe, thereby fixing the exhaust pipe. During the welding of the exhaust pipe, the staff can rotate the exhaust pipe by rotating the mounting seat, and after rotating to a suitable angle, the staff can limit the rotation of the mounting ring by the limiting assembly, thereby performing annular welding on the connection position, thereby improving the efficiency of automobile exhaust pipe welding;

[0024] 2. In this application, after rotating the mounting ring and the automobile exhaust pipe to a suitable angle, the staff engages the limit block with the tooth groove on the gear by pulling the block, thereby limiting the rotation of the mounting ring and reducing the probability of the mounting ring rotating during the welding process;

[0025] 3. In the present application, the distance between the two mounting seats can be adjusted by moving the moving block in the moving groove, so as to facilitate the fixation of exhaust pipes of different lengths. After adjusting the positions of the two mounting seats, the staff needs to tighten the limit nut so that the side wall of the limit nut is pressed against the side wall of the base, thereby limiting the movement of the moving block and reducing the probability of displacement of the mounting seat during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0027] Figure 2 It is a schematic cross-sectional structure diagram of an embodiment of the utility model;

[0028] Figure 3 yes Figure 2 A magnified schematic diagram of center A.

[0029] In the figure: 1. base; 11. movable groove; 12. slide groove; 2. mounting seat; 21. arc groove; 3. mounting ring; 4. fixing assembly; 41. fixing rod; 42. upper fixing plate; 43. cylinder; 44. lower fixing plate; 5. limiting assembly; 51. gear; 52. mounting block; 521. fixing groove; 53. cross bar; 54. limiting block; 541. anti-slip sheet; 55. pulling block; 6. spring; 7. rubber pad; 8. movable block; 9. limiting assembly; 91. screw; 92. limiting nut; 10. annular rubber sheet. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0031] like Figure 1-3 As shown, an embodiment of the present application discloses a positioning fixture for welding an automobile exhaust pipe, comprising a base 1, a mounting seat 2, a mounting ring 3, a fixing component 4 and a limiting component 5.

[0032] The base 1 is a rectangular parallelepiped structure, and the base 1 is used to carry the device. The mounting seat 2 is arranged on the upper surface of the base 1, and two mounting seats 2 are provided, and an arc groove 21 is opened on the upper surface of each mounting seat 2. The mounting ring 3 is a structure with a ring-shaped cross section, and two mounting rings 3 are provided, and the two mounting rings 3 are rotatably connected to the inner walls of the two arc grooves 21 respectively.

[0033] Two groups of fixing components 4 are provided, and the two groups of fixing components 4 are respectively installed on two mounting rings 3 for fixing the exhaust pipe. Each group of fixing components 4 includes a fixing rod 41, an upper fixing plate 42, a cylinder 43 and a lower fixing plate 44. The fixing rod 41 is a vertically arranged rectangular rod-shaped structure, and the fixing rod 41 is fixed on the inner top wall of the mounting ring 3. The upper fixing plate 42 is a plate-shaped structure with an arc-shaped cross section, and the upper fixing plate 42 is fixed to the lower end of the fixing rod 41. The cylinder 43 is fixed on the inner bottom wall of the mounting ring 3, and the piston rod of the cylinder 43 extends vertically upward. The lower fixing plate 44 is a plate-shaped structure with an arc-shaped cross section, and the lower fixing plate 44 is fixed to the end of the piston rod of the cylinder 43, and the lower fixing plate 44 is symmetrically arranged with the upper fixing plate 42.

[0034] The limiting assembly 5 is installed on the mounting ring 3 and the mounting seat 2, and is used to limit the rotation of the mounting ring 3. The limiting assembly 5 includes a gear 51, a mounting block 52, a cross bar 53, a limit block 54 and a pulling block 55. The gear 51 is fixedly sleeved on the mounting ring 3, and the axis of the gear 51 coincides with the axis of the mounting ring 3. The mounting block 52 is a rectangular parallelepiped structure, and the mounting block 52 is fixed on the side wall of the mounting seat 2. The cross bar 53 is a horizontally arranged rod-shaped structure, and the cross bar 53 is penetrated and slidably connected on the side wall of the mounting block 52. The limit block 54 is fixed at the end of the cross bar 53, and the limit block 54 is meshed with the gear 51. The pulling block 55 is a round block structure, and the pulling block 55 is fixed at one end of the cross bar 53 away from the limit block 54.

[0035] When it is necessary to weld the automobile exhaust pipe, the staff places the automobile exhaust pipe on the lower fixing plate 44, and controls the cylinder 43 to move the lower fixing plate 44 upward to cooperate with the upper fixing plate 42 and press against the exhaust pipe, thereby fixing the exhaust pipe. During the welding of the exhaust pipe, the staff can rotate the exhaust pipe by rotating the mounting seat 2. After rotating to a suitable angle, the limit block 54 is engaged with the tooth groove on the gear 51 by pulling the block 55, thereby limiting the rotation of the mounting ring 3, reducing the probability of the mounting ring 3 rotating during the welding process, thereby performing annular welding on the connection position, and improving the efficiency of automobile exhaust pipe welding.

[0036] In order to reduce the probability that the limit block 54 is separated from the gear 51 and causes the mounting ring 3 to rotate, a fixing groove 521 is provided on the side wall of the mounting block 52 away from the limit block 54, and a spring 6 is arranged in the fixing groove 521. One end of the spring 6 is fixed to the side wall of the pulling block 55, and the other end of the spring 6 is fixed to the inner wall of the fixing groove 521. The setting of the spring 6 enables the pulling block 55 to drive the limit block 54 to maintain a meshing state with the gear 51 under the elastic force of the spring 6, so that the limit block 54 is pressed against the gear 51, thereby reducing the probability that the limit block 54 is separated from the gear 51 and causes the mounting ring 3 to rotate.

[0037] In order to enhance the stability of the engagement between the limit block 54 and the gear 51, an anti-skid sheet 541 is fixed to the side wall of the limit block 54 away from the cross bar 53. The anti-skid sheet 541 is made of rubber material and its surface has a large friction coefficient. The limit block 54 cooperates with the gear 51 and presses against the anti-skid sheet 541, thereby increasing the friction between the limit block 54 and the gear 51, thereby enhancing the stability of the engagement between the limit block 54 and the gear 51.

[0038] In order to reduce the probability of the limit block 54 being out of engagement with the gear 51 due to rotation, the cross bar 53 has a rectangular cross section. The rectangular cross section reduces the probability of the cross bar 53 rotating, thereby reducing the probability of the limit block 54 being out of engagement with the gear 51 due to rotation.

[0039] In order to enhance the fixing effect on the automobile exhaust pipe, the side walls of the upper fixing plate 42 and the lower fixing plate 44 close to each other are provided with rubber pads 7, and the rubber pads 7 are made of rubber material, and the material has a large friction force. The upper fixing plate 42 and the lower fixing plate 44 cooperate with the automobile exhaust pipe and press against the rubber pad 7, thereby increasing the friction between the upper fixing plate 42, the lower fixing plate 44 and the automobile exhaust pipe, thereby enhancing the fixing effect on the automobile exhaust pipe.

[0040] In order to fix exhaust pipes of different lengths, a moving groove 11 is provided on the upper surface of the base 1, and a moving block 8 is fixed at the bottom of each mounting seat 2, which is slidably connected to the inner wall of the chute 12. The side wall of the base 1 is provided with a chute 12 connected to the moving groove 11. A limiting assembly 9 is installed on the moving block 8 to limit the moving block 8. The limiting assembly 9 includes a screw 91 and a limiting nut 92. The screw 91 is fixed on the side wall of the moving block 8, and the screw 91 is slidably connected to the inner wall of the chute 12. The limiting nut 92 is sleeved on the screw 91 and threadedly connected, and the axis of the limiting nut 92 coincides with the axis of the screw 91. The distance between the two mounting seats 2 can be adjusted by moving the moving block 8 in the moving groove 11, so as to facilitate the fixing of exhaust pipes of different lengths. After adjusting the positions of the two mounting seats 2, the staff needs to tighten the limiting nut 92 so that the side wall of the limiting nut 92 is pressed against the side wall of the base 1, thereby limiting the movement of the moving block 8 and reducing the probability of displacement of the mounting seat 2 during welding.

[0041] In order to reduce the probability of the limit nut 92 rotating, an annular rubber sheet 10 is sleeved on the screw rod 91 and is located between the limit nut 92 and the base 1. The annular rubber sheet 10 is made of rubber material and its surface has a large friction coefficient. The side wall of the limit nut 92 cooperates with the side wall of the base 1 and presses against the annular rubber sheet 10, thereby increasing the friction between the side wall of the limit nut 92 and the side wall of the base 1, thereby reducing the probability of the limit nut 92 rotating.

[0042] The use principle of a positioning fixture for welding an automobile exhaust pipe in the present embodiment is as follows: when it is necessary to weld the automobile exhaust pipe, the staff places the automobile exhaust pipe on the lower fixing plate 44, and controls the cylinder 43 to move the lower fixing plate 44 upward to cooperate with the upper fixing plate 42 and press against the exhaust pipe, thereby fixing the exhaust pipe. During the welding of the exhaust pipe, the staff can rotate the exhaust pipe by rotating the mounting seat 2, and after rotating it to a suitable angle, the limit block 54 is engaged with the tooth groove on the gear 51 by pulling the block 55, thereby limiting the rotation of the mounting ring 3, reducing the probability of the mounting ring 3 rotating during the welding process, thereby performing annular welding on the connection position, and improving the efficiency of automobile exhaust pipe welding.

[0043] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A positioning fixture for welding an automobile exhaust pipe, comprising a base (1), characterized in that: Two mounting seats (2) are arranged on the upper surface of the base (1), and each mounting seat (2) is provided with an arc-shaped groove (21) on its upper surface. The inner wall of each arc-shaped groove (21) is rotatably connected to a mounting ring (3). A fixing assembly (4) for fixing the exhaust pipe is installed in each mounting ring (3). Each group of the fixing assemblies (4) comprises a fixing rod (41) fixed to the inner top wall of the mounting ring (3), an upper fixing plate (42) fixed to the lower end of the fixing rod (41), a cylinder (43) fixed to the inner bottom wall of the mounting ring (3), and a lower fixing plate (44) fixed to the end of the piston rod of the cylinder (43). A limiting assembly (5) for limiting the rotation of the mounting ring (3) is installed on the mounting ring (3) and the mounting seat (2).

2. The positioning fixture for welding an automobile exhaust pipe according to claim 1 is characterized in that: The limiting assembly (5) comprises a gear (51) fixedly sleeved on the mounting ring (3), a mounting block (52) fixed to the side wall of the mounting seat (2), a cross bar (53) penetrating the side wall of the mounting block (52) and slidably connected, a limit block (54) fixed to the end of the cross bar (53) and meshing with the gear (51), and a pulling block (55) fixed to one end of the cross bar (53) away from the limit block (54).

3. The positioning fixture for welding an automobile exhaust pipe according to claim 2 is characterized in that: A fixing groove (521) is provided on the side wall of the mounting block (52) away from the limiting block (54), a spring (6) is arranged in the fixing groove (521), one end of the spring (6) is fixed to the side wall of the pulling block (55), and the other end of the spring (6) is fixed to the inner wall of the fixing groove (521).

4. The positioning fixture for welding an automobile exhaust pipe according to claim 3 is characterized in that: An anti-slip sheet (541) is fixed to the side wall of the limiting block (54) on the side away from the cross bar (53).

5. The positioning fixture for welding an automobile exhaust pipe according to claim 4 is characterized in that: The cross-section of the crossbar (53) is rectangular.

6. The positioning fixture for welding an automobile exhaust pipe according to claim 1 is characterized in that: The side walls of the upper fixing plate (42) and the lower fixing plate (44) on the side close to each other are both provided with rubber pads (7).

7. The positioning fixture for welding an automobile exhaust pipe according to claim 1 is characterized in that: The upper surface of the base (1) is provided with a moving groove (11), and a moving block (8) slidably connected to the inner wall of the sliding groove (12) is fixed at the bottom of each of the mounting seats (2). The side wall of the base (1) is provided with a sliding groove (12) connected to the moving groove (11), and a limiting assembly (9) for limiting the moving block (8) is installed on the moving block (8), and the limiting assembly (9) comprises a screw (91) fixed to the side wall of the moving block (8) and slidably connected to the inner wall of the sliding groove (12), and a limiting nut (92) sleeved on the screw (91) and threadedly connected.

8. The positioning fixture for welding an automobile exhaust pipe according to claim 7 is characterized in that: The screw rod (91) is sleeved with an annular rubber sheet (10) located between the limiting nut (92) and the base (1).

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