Automobile exhaust pipeline positioning and clamping structure

Abstract

The invention relates to the technical field of clamping equipment, in particular to an automobile exhaust pipeline positioning and clamping structure which comprises a rack, two sets of positive clamping parts installed on the rack and side pushing parts installed on the positive clamping parts, the positive clamping parts are used for extruding and clamping the middle section of a Z-shaped pipeline, and the side pushing parts are used for pushing the middle section of the Z-shaped pipeline. The lateral pushing part is used for laterally extruding the lateral bending part of the Z-shaped pipeline by utilizing the bending characteristic of the Z-shaped pipeline; each positive clamping part comprises a movable table slidably mounted on the rack, the sliding directions of the two movable tables on the two positive clamping parts are opposite, a flat supporting plate is horizontally arranged on the side wall of each movable table, and a lower pressing plate is vertically inserted into the top of each movable table in a sliding mode; multi-point contact is carried out on the middle section part and the lateral bending part of the Z-shaped pipeline through the two sets of positive clamping parts and the two sets of lateral pushing parts, it is guaranteed that the Z-shaped pipeline can be accurately aligned, positioned and clamped, positioning errors are reduced, and the clamping strength and the clamping effectiveness are improved.

Description

Technical Field

[0001] The invention relates to the technical field of clamping equipment, in particular to a positioning clamping structure for an automobile exhaust pipe. Background Art

[0002] With the continuous development of the automobile industry, the performance and reliability of automobile exhaust systems have received more and more attention. The exhaust system not only affects the performance and fuel economy of the engine, but also is related to the vehicle's emission standards and driving comfort. In complex exhaust systems, Z-type pipes, as a common design element, are often used to solve problems such as space limitations and vibration absorption. However, the positioning and fixation of Z-type pipes have always been a difficult point in the design. Improper clamping structures can easily lead to the inability to accurately grind, weld, or open holes in the pipeline, which can easily cause exhaust leakage, increased noise, and even system failure.

[0003] Traditional exhaust pipe clamping structures mostly use simple bolt fixing or clamp connection. These methods have the following problems when dealing with the special geometric shape of the Z-shaped pipe: Insufficient positioning accuracy: Due to the multi-angle bending of the Z-shaped tube, the traditional clamping structure is difficult to align accurately, resulting in installation difficulties and positioning deviations; Weak fixation: There is little effective clamping of the pipeline, and it can only play a simple limiting role; Stress concentration: Clamping can only be achieved by applying a strong squeezing force to the clamping position on the pipeline, which can easily cause damage to the pipeline. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a positioning and clamping structure for an automobile exhaust pipe, and the specific technical solution adopted is: According to a first aspect of the present invention, there is provided a positioning and clamping structure for an automobile exhaust pipe, comprising a frame, two groups of positive clamping parts mounted on the frame, and side pushing parts mounted on each group of positive clamping parts, wherein the positive clamping parts are used to squeeze and clamp the middle section of the Z-shaped pipe, and the side pushing parts are used to squeeze the side bending part of the Z-shaped pipe by utilizing the bending characteristics of the Z-shaped pipe; The positive clamping part comprises a moving platform slidably mounted on the frame, the sliding directions of the two moving platforms on the two sets of positive clamping parts are opposite, a flat support plate is horizontally arranged on the side wall of the moving platform, a lower pressing plate is vertically slidably inserted on the top of the moving platform, the lower pressing plate is connected to the moving platform by a first elastic sheet, and a plurality of pressing belts are connected between the lower pressing plate and the flat support plate, and the pressing belts are used to hold and fix the middle section of the Z-shaped pipe; Among them, the end of the flat supporting plate away from the moving platform and the end of the lower pressing plate away from the moving platform are both provided with inclined edges, the two groups of positive clamping parts move synchronously, and the two groups of side pushing parts move synchronously.

[0005] Furthermore, sliders are slidably arranged on the flat support plate and the lower pressure plate, the sliding direction of the sliders is perpendicular to the moving direction of the moving platform, the end of the pressing belt is fixed on the sliders, and the lower pressure plate and its upper slider, and the flat support plate and its upper slider are connected by second spring sheets.

[0006] Furthermore, the side thrust part includes a support rod fixed on the side wall of the moving platform, a groove plate is obliquely arranged at the end of the support rod away from the moving platform, a prism is slidably arranged in the groove plate, an arc-shaped pressure plate is arranged at one end of the prism, a limit plate is arranged at the other end of the prism, and the limit plate and the support rod are connected by a first spring, and the first spring is sleeved on the prism.

[0007] Furthermore, a spherical shell is arranged between the prism and the arc-shaped pressure plate, a moving disk is slidably arranged in the spherical shell, and the center point of the moving disk is located at the center of the spherical shell, and a plurality of second springs are arranged on the end surface of the moving disk, and the plurality of second springs are parallel to each other and fixedly connected to the inner wall of the spherical shell; The moving disk is provided with a push-pull column, which is connected to the arc-shaped pressure plate, and the end of the prism is fixedly connected to the outer wall of the spherical shell.

[0008] Furthermore, the arc-shaped pressing plate is hollow inside, and a plurality of suction holes are provided on the working surface of the arc-shaped pressing plate, and the suction holes are connected to the inside of the arc-shaped pressing plate; A piston is slidably arranged inside the arc-shaped pressing plate, and the piston divides the inner space of the arc-shaped pressing plate into an energy storage chamber and an adsorption chamber, and the adsorption chamber is connected to the suction hole, and the piston is connected to the inner wall of the arc-shaped pressing plate through a third elastic sheet, and an air pipe is arranged on the piston, and the end of the air pipe passes through the arc-shaped pressing plate and extends out, and a side hole is opened on the side wall of the air pipe; The push-pull column passes through the arc-shaped pressure plate and is fixedly connected to the piston.

[0009] Furthermore, clamping plates are provided on both upper and lower sides of the arc-shaped pressure plate, the clamping plates are rotatably connected to the arc-shaped pressure plate via two mutually parallel guide plates, and the clamping plates are rotatably connected to the ball shell via a push-pull rod.

[0010] Furthermore, a first oblique arm is rotatably arranged on the frame, and the rotation connection point between the first oblique arm and the frame is located in the middle of the first oblique arm, and the rotation connection point of the first oblique arm is located in the middle position of the two movable platforms. Second oblique arms are rotatably arranged at both ends of the first oblique arm, and the two second oblique arms are respectively rotatably connected to the side walls of the two movable platforms.

[0011] Furthermore, a connecting arm is rotatably provided on the side wall of each prism, a cylinder is provided on the connecting arm, and a fixed end of the cylinder is mounted on the frame.

[0012] The beneficial effects of the present invention are: The middle section and the side bend of the Z-shaped pipe are contacted at multiple points by two sets of positive clamps and side pushers, ensuring accurate alignment, positioning and clamping of the Z-shaped pipe, reducing positioning errors and improving clamping strength and clamping effectiveness; the two sets of positive clamps and side pushers move synchronously, ensuring the positioning consistency of the Z-shaped pipe in all directions and avoiding deflection and asymmetry problems caused by single-point fixation; the deformation design of the pressure belt can automatically adjust the clamping shape and contact area according to the shape of the Z-shaped pipe, ensuring the fixing effect and avoiding damage to the Z-shaped pipe caused by excessive compression; the combined design of the positive clamp and the side pusher not only provides clamping force for the Z-shaped pipe in the horizontal direction by utilizing the shape characteristics of the Z-shaped pipe, but also realizes the vertical direction of the Z-shaped pipe through the interaction of the oblique edges. The comprehensive positioning of the pipe ensures the stability of the Z-type pipe under various working conditions; the entire clamping structure adopts a modular design, and each component can be replaced and adjusted independently, which reduces the difficulty of installation and maintenance, and the clamping is achieved through sliding and elastic deformation, which is easy to operate and does not require complicated tools and equipment; the elastic deformation design of the pressing belt enables it to adapt to Z-type pipes of different diameters, thereby improving the versatility of the clamping structure; in summary, the above technical scheme solves the shortcomings of the traditional clamping structure in terms of positioning accuracy, fixing effect and stress concentration through designs such as multi-point contact, synchronous movement, elastic clamping and multi-directional positioning. These advantages make the clamping structure easier to operate and produce high-quality Z-type pipes during the processing of automobile exhaust pipes, significantly improving the performance and reliability of the exhaust system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 is a schematic diagram of a Z-shaped pipe clamping state in an embodiment of the present invention; Figure 3 is a schematic structural diagram of a rack in an embodiment of the present invention; Figure 4 2 is a schematic structural diagram of a front clamping portion and a side pushing portion in an embodiment of the present invention; Figure 5 yes Figure 4 A schematic diagram of the structure from another perspective; Figure 6 is a schematic structural diagram of a side thrust portion in an embodiment of the present invention; Figure 7 yes Figure 6 A schematic diagram of the structure in cross-section; Figure 8 Schematic diagram of the structure of the arc pressure plate in an embodiment of the present invention. Reference numerals: 1. Frame; 2. Front clamping part; 3. Side push part; 4. Z-shaped pipe; 5. Moving table; 6. Flat support plate; 7. Lower pressure plate; 8. First spring piece; 9. Pressing belt; 10. Oblique edge; 11. Sliding block; 12. Second spring piece; 13. Support rod; 14. Groove plate; 15. Prism; 16. Arc pressure plate; 17. Limiting plate; 18. First spring; 19. Ball shell; 20. Moving plate; 21. Second spring; 22. Push-pull column; 23. Suction hole; 24. Piston; 25. Third spring piece; 26. Air pipe; 27. Side hole; 28. Clamping plate; 29. ​​Guide plate; 30. Push-pull rod; 31. First oblique arm; 32. Second oblique arm; 33. Cylinder; 34. Connecting arm. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0016] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside”, etc., are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0017] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. This embodiment is written in a progressive manner.

[0018] like Figures 1 to 8 As shown, a positioning and clamping structure for an automobile exhaust pipe of the present invention comprises a frame 1, two groups of positive clamping parts 2 installed on the frame 1, and side pushing parts 3 installed on each group of positive clamping parts 2, wherein the positive clamping parts 2 are used to squeeze and clamp the middle section of the Z-shaped pipe 4, and the side pushing parts 3 are used to side-extrude the side bending part of the Z-shaped pipe 4 by utilizing the bending characteristics of the Z-shaped pipe 4; The positive clamping part 2 includes a moving platform 5 slidably mounted on the frame 1, the sliding directions of the two moving platforms 5 on the two groups of positive clamping parts 2 are opposite, a flat support plate 6 is horizontally arranged on the side wall of the moving platform 5, a lower pressing plate 7 is vertically slidably inserted on the top of the moving platform 5, the lower pressing plate 7 is connected to the moving platform 5 by a first spring sheet 8, and a plurality of pressing belts 9 are connected between the lower pressing plate 7 and the flat support plate 6, and the pressing belts 9 are used to hold and fix the middle section of the Z-shaped pipe 4; The ends of the flat support plate 6 and the lower pressing plate 7 away from the moving platform 5 are both provided with inclined edges 10, and the two groups of positive clamping parts 2 and the two groups of side pushing parts 3 move synchronously.

[0019] In detail, the middle straight section of the Z-shaped pipe 4 is set as the middle section, and the straight sections on both sides of the Z-shaped pipe 4 form an angle with the middle section, so the sections on both sides of the Z-shaped pipe 4 are set as the side bending sections. After the two groups of positive clamps 2 clamp the middle section of the Z-shaped pipe 4, the two groups of side pushers 3 are used to push and extrude the two side bending sections of the Z-shaped pipe 4 outward, so that the positive clamps 2 and the upper side pushers 3 can extrude both sides of the angle formed by the middle section and the side bending sections of the Z-shaped pipe 4. In this way, the Z-shaped pipe 4 with a special shape can be extruded and fixed, and because the two groups of positive clamps 2 move synchronously and the two groups of side pushers 3 move synchronously, the synchronous positioning of the Z-shaped pipe 4 can be achieved.

[0020] The moving platform 5 on the positive clamping part 2 is slidably installed on the frame 1. The moving trajectories of the two moving platforms 5 on the two groups of positive clamping parts 2 are collinear, and the two moving platforms 5 move relative to each other synchronously. When the middle section of the Z-shaped pipe 4 needs to be clamped and fixed, the moving platform 5 moves toward the middle section of the Z-shaped pipe 4. At this time, the flat support plate 6, the lower pressure plate 7, the first spring piece 8 and the pressing belt 9 on the moving platform 5 move synchronously. The lower pressure plate 7 and the flat support plate 6 are in a separated state due to the action of the first spring piece 8. When the pressing belt 9 contacts the outer wall of the middle section of the Z-shaped pipe 4, the Z-shaped pipe 4 reversely squeezes the pressing belt 9, so that the pressing belt 9 gradually changes from a vertical line to an arc and adheres to the pressing belt 9. On the outer wall of the Z-shaped pipe 4, this method can increase the contact area between the pressing belt 9 and the Z-shaped pipe 4, so that the force on the Z-shaped pipe 4 is more uniform, and multiple pressing belts 9 can be set to increase the range of the force acting on the Z-shaped pipe 4. When the pressing belt 9 is bent and deformed, it can pull the lower pressure plate 7 downward, and the lower pressure plate 7 and the flat support plate 6 are close to each other. The first spring piece 8 is elastically deformed, and the inclined edge 10 on the flat support plate 6 and the inclined edge 10 on the lower pressure plate 7 are close to the outer wall of the Z-shaped pipe 4 and rely on each other. At this time, the forces of the two inclined edges 10 on the Z-shaped pipe 4 are synchronously limited by the pressing belt 9, thereby realizing the limitation of the Z-shaped pipe 4 in the vertical direction.

[0021] It should be pointed out that when the two groups of positive clamps 2 clamp the middle section of the Z-shaped pipe 4, the Z-shaped pipe 4 cannot rotate on the horizontal plane, that is, the force of the side thrust parts 3 on the Z-shaped pipe 4 cannot cause the Z-shaped pipe 4 to rotate between the two positive clamps 2, and the restriction of the two groups of side thrust parts 3 on the Z-shaped pipe 4 cannot cause the Z-shaped pipe 4 to slide along the straight direction of the middle section of the Z-shaped pipe 4 between the two groups of positive clamps 2. Combined with the restriction of the Z-shaped pipe 4 in the vertical direction by the two oblique edges 10 on the positive clamps 2, the comprehensive positioning and clamping of the Z-shaped pipe 4 can be achieved.

[0022] Since the power for the two oblique edges 10 on the positive clamping part 2 to limit the Z-shaped pipe 4 mainly comes from the deformation of the pressing belt 9, and the deformation of the pressing belt 9 mainly comes from the reverse extrusion of the Z-shaped pipe 4, this structural method has a relatively simple structure and has a higher clamping diversity.

[0023] The middle section and the side bending section of the Z-shaped pipe 4 are contacted at multiple points by two groups of positive clamps 2 and side pushers 3, ensuring that the Z-shaped pipe 4 can be accurately aligned, positioned and clamped, reducing positioning errors and improving clamping strength and clamping effectiveness; the two groups of positive clamps 2 and side pushers 3 move synchronously, ensuring the positioning consistency of the Z-shaped pipe 4 in all directions, avoiding the deflection and asymmetry problems caused by single-point fixation; the deformation design of the pressing belt 9 can automatically adjust the clamping shape and contact area according to the shape of the Z-shaped pipe 4, which not only ensures the fixing effect, but also avoids damage to the Z-shaped pipe 4 caused by excessive compression; the combined design of the positive clamp 2 and the side pusher 3 not only provides a clamping force for the Z-shaped pipe 4 in the horizontal direction by utilizing the shape characteristics of the Z-shaped pipe 4, but also in the vertical direction through the interaction of the oblique edges 10 Comprehensive positioning of the Z-type pipe 4 is achieved, ensuring the stability of the Z-type pipe 4 under various working conditions; the entire clamping structure adopts a modular design, and each component can be replaced and adjusted independently, reducing the difficulty of installation and maintenance, and clamping is achieved through sliding and elastic deformation, which is easy to operate and does not require complicated tools and equipment; the elastic deformation design of the pressing belt 9 enables it to adapt to Z-type pipes of different diameters, thereby improving the versatility of the clamping structure; in summary, the above technical scheme solves the shortcomings of the traditional clamping structure in terms of positioning accuracy, fixing effect and stress concentration through designs such as multi-point contact, synchronous movement, elastic clamping and multi-directional limiting. These advantages make the clamping structure easier to operate and produce high-quality Z-type pipes 4 during the processing of automobile exhaust pipes, thereby significantly improving the performance and reliability of the exhaust system.

[0024] Furthermore, a slider 11 is slidably provided on the flat support plate 6 and the lower pressure plate 7, the sliding direction of the slider 11 is perpendicular to the moving direction of the moving platform 5, the end of the pressing belt 9 is fixed on the slider 11, and the lower pressure plate 7 and its upper slider 11, and the flat support plate 6 and its upper slider 11 are connected by a second spring sheet 12.

[0025] In detail, when the clamping position of the middle section of the Z-shaped pipe 4 by the two groups of positive clamps 2 is not at the midpoint of the middle section, the two groups of side pushers 3 move synchronously to both sides and squeeze the two side bending parts of the Z-shaped pipe 4, the Z-shaped pipe 4 will move on the two groups of positive clamps 2, that is, the middle section of the Z-shaped pipe 4 will move between the two groups of positive clamps 2 until the middle section of the Z-shaped pipe 4 coincides with the clamping position of the positive clamps 2, thereby realizing the positioning and clamping of the Z-shaped pipe 4, and when the Z-shaped pipe 4 moves on the positive clamps 2, the Z-shaped pipe 4 can drive the slider 11 to slide on the flat support plate 6 or the lower pressure plate 7 through the pressing belt 9, thereby facilitating the adjustment of the position of the Z-shaped pipe 4 and avoiding the friction between the Z-shaped pipe 4 and the pressing belt 9 causing the Z-shaped pipe 4 to be difficult to move and affect the positioning of the Z-shaped pipe 4, and the second spring piece 12 on the slider 11 can help the slider 11 to reset.

[0026] Furthermore, the side thrust portion 3 includes a support rod 13 fixed on the side wall of the movable platform 5, a groove plate 14 is obliquely provided at the end of the support rod 13 away from the movable platform 5, a prism 15 is slidably provided in the groove plate 14, an arc-shaped pressure plate 16 is provided at one end of the prism 15, a limiting plate 17 is provided at the other end of the prism 15, and the limiting plate 17 is connected to the support rod 13 by a first spring 18, and the first spring 18 is sleeved on the prism 15.

[0027] In detail, the groove plate 14 and the prism 15 are inclined, and the arc-shaped pressure plate 16 is located at one end of the prism 15 close to the moving platform 5. In the natural state, due to the action of the first spring 18, the arc-shaped pressure plate 16 is away from the Z-shaped pipe 4. When the prism 15 is pushed to move along the moving track of the moving platform 5, the prism 15 will push the moving platform 5 to move through the first spring 18, the groove plate 14 and the support rod 13, thereby providing moving power for the positive clamping part 2. When the positive clamping part 2 completes clamping the Z-shaped pipe 4 and stops moving, it continues to exert force on the prism 15. The prism 15 is inclined, so it will slide on the groove plate 14 against the elastic force of the first spring 18. The prism 15 pushes the arc pressure plate 16 to move toward the side bending part of the Z-shaped pipe 4 and extrude it. Therefore, the driving force provided to the prism 15 can be directly used to provide power to the front clamping part 2 and the side thrust part 3, without the need to set power for each of the front clamping part 2 and the side thrust part 3 separately. This makes operation convenient. The limit plate 17 can provide support for the first spring 18 and limit the prism 15.

[0028] Furthermore, a spherical shell 19 is provided between the prism 15 and the arc-shaped pressure plate 16, a moving disk 20 is slidably provided in the spherical shell 19, and the center point of the moving disk 20 is located at the center of the sphere of the spherical shell 19, and a plurality of second springs 21 are provided on the end surface of the moving disk 20, and the plurality of second springs 21 are parallel to each other and fixedly connected to the inner wall of the spherical shell 19; The moving disk 20 is provided with a push-pull column 22 , which is connected to the arc-shaped pressure plate 16 , and the end of the prism 15 is fixedly connected to the outer wall of the spherical shell 19 .

[0029] In detail, since the bending angles of the side bending parts of the Z-shaped pipe 4 are different and the fixed heights of the Z-shaped pipe 4 in the vertical direction are different, when it is necessary to use the arc pressure plate 16 to push the side bending part of the Z-shaped pipe 4 sideways, it is necessary to make the arc surface of the arc pressure plate 16 contact with the outer wall of the side bending part of the Z-shaped pipe 4, which results in the arc surface of the arc pressure plate 16 always facing the outer wall of the Z-shaped pipe 4, that is, the direction of the arc pressure plate 16 needs to change according to the position of the arc pressure plate 16, and thus the arc pressure plate 16 needs to be able to move in any direction on the spherical shell 19, and the movement of the arc pressure plate 16 can be achieved by the reaction force of the Z-shaped pipe 4 on the arc pressure plate 16.

[0030] When the orientation of the arc pressure plate 16 changes, the arc pressure plate 16 will drive the moving disk 20 to move in the spherical shell 19 through the push-pull column 22. Since the center point of the moving disk 20 is located at the center of the spherical shell 19, the moving disk 20 can move arbitrarily on the inner wall of the spherical shell 19. The function of the multiple second springs 21 is mainly to provide a reset elastic force for the moving disk 20.

[0031] Furthermore, the arc-shaped pressing plate 16 is hollow inside, and a plurality of suction holes 23 are provided on the working surface of the arc-shaped pressing plate 16, and the suction holes 23 are connected to the inside of the arc-shaped pressing plate 16; A piston 24 is slidably disposed in the arc-shaped pressing plate 16, and the piston 24 divides the inner space of the arc-shaped pressing plate 16 into an energy storage chamber and an adsorption chamber. The adsorption chamber is connected to the suction hole 23. The piston 24 is connected to the inner wall of the arc-shaped pressing plate 16 through a third elastic sheet 25. An air pipe 26 is disposed on the piston 24, and the end of the air pipe 26 passes through the arc-shaped pressing plate 16 and extends out, and a side hole 27 is opened on the side wall of the air pipe 26; The push-pull column 22 passes through the arc-shaped pressure plate 16 and is fixedly connected to the piston 24 .

[0032] In detail, when the push-pull column 22 pushes the arc pressure plate 16 to squeeze on the side bending part of the Z-shaped pipe 4, the arc pressure plate 16 stops moving. At this time, the push-pull column 22 will push the piston 24 to continue moving and cause the third spring piece 25 to undergo elastic deformation. The space of the adsorption chamber is reduced, and the space of the energy storage chamber is increased. A negative pressure is formed inside the energy storage chamber, and excess air in the adsorption chamber is discharged through the air pipe 26 and the side hole 27. As the piston 24 moves in the arc pressure plate 16, the air pipe 26 gradually enters the energy storage chamber. When the side hole 27 moves into the energy storage chamber, the adsorption chamber can no longer be connected to the outside world. At this time, the negative pressure state in the energy storage chamber can be transmitted to the adsorption chamber through the side hole 27 and the air pipe 26, thereby forming a negative pressure inside the adsorption chamber, and the negative pressure adsorbs and fixes the Z-shaped pipe 4 through the suction hole 23.

[0033] The third elastic piece 25 is mainly used to reset the piston 24 in the arc-shaped pressure plate 16 in the natural state.

[0034] Furthermore, clamping plates 28 are provided on both upper and lower sides of the arc-shaped pressure plate 16 . The clamping plates 28 are rotatably connected to the arc-shaped pressure plate 16 via two mutually parallel guide plates 29 , and the clamping plates 28 are rotatably connected to the ball shell 19 via a push-pull rod 30 .

[0035] In detail, the two ends of the push-pull rod 30 are rotatably connected to the ball shell 19 and the clamping plate 28 respectively, and the rotatable connection is achieved by rotating the ball, so that the clamping plate 28 can be moved in any direction on the ball shell 19. When the arc pressure plate 16 contacts the outer wall of the Z-shaped pipe 4 and stops moving, the ball shell 19 continues to move and pushes the piston 24 to move through the push-pull column 22. At this time, the ball shell 19 will push the clamping plate 28 to move through the push-pull rod 30. The two guide plates 29 guide the clamping plate 28, so that the clamping plate 28 is translated and buckled on the outer wall of the Z-shaped pipe 4, thereby making the two clamping plates 28 clamp and fix the side bending part of the Z-shaped pipe 4 in the vertical direction, thereby improving the fixing strength of the Z-shaped pipe 4, and the clamping method is mainly achieved by the relative movement of the arc pressure plate 16 and the ball shell 19, that is, on the basis of the original movement form, the equipment function is more comprehensive.

[0036] Furthermore, a first oblique arm 31 is rotatably provided on the frame 1, and the rotation connection point between the first oblique arm 31 and the frame 1 is located in the middle of the first oblique arm 31, and the rotation connection point of the first oblique arm 31 is located in the middle position of the two movable platforms 5. Second oblique arms 32 are rotatably provided at both ends of the first oblique arm 31, and the two second oblique arms 32 are rotatably connected to the side walls of the two movable platforms 5 respectively.

[0037] In detail, when a movable platform 5 slides on the frame 1, it can drive another movable platform 5 to move synchronously relative to it through the first inclined arm 31 and the two second inclined arms 32, thereby making the two groups of positive clamps 2 move synchronously in opposite directions, thereby achieving the purpose of positioning the Z-shaped pipe 4 using the two positive clamps 2.

[0038] Furthermore, a connecting arm 34 is rotatably provided on the side wall of each prism 15 , a cylinder 33 is provided on the connecting arm 34 , and a fixed end of the cylinder 33 is mounted on the frame 1 .

[0039] In detail, the cylinder 33 can provide moving power for the prism 15 through the connecting arm 34, so that the front clamping part 2 and the side thrust part 3 can operate. Since the movement trajectory of the prism 15 is inclined, the connecting arm 34 is required to realize the connection work.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A positioning and clamping structure for an automobile exhaust pipe, characterized in that: It comprises a frame, two groups of front clamps installed on the frame, and side pushers installed on each group of front clamps, wherein the front clamps are used to squeeze and clamp the middle section of the Z-shaped pipe, and the side pushers are used to squeeze the side bending section of the Z-shaped pipe by utilizing the bending characteristics of the Z-shaped pipe; The positive clamping part comprises a moving platform slidably mounted on the frame, the sliding directions of the two moving platforms on the two sets of positive clamping parts are opposite, a flat support plate is horizontally arranged on the side wall of the moving platform, a lower pressing plate is vertically slidably inserted on the top of the moving platform, the lower pressing plate is connected to the moving platform by a first elastic sheet, and a plurality of pressing belts are connected between the lower pressing plate and the flat support plate, and the pressing belts are used to hold and fix the middle section of the Z-shaped pipe; Among them, the end of the flat supporting plate away from the moving platform and the end of the lower pressing plate away from the moving platform are both provided with inclined edges, the two groups of positive clamping parts move synchronously, and the two groups of side pushing parts move synchronously.

2. The automobile exhaust pipe positioning and clamping structure according to claim 1 is characterized in that: The flat support plate and the lower pressure plate are both slidably provided with sliders, the sliding direction of the sliders is perpendicular to the moving direction of the moving platform, the end of the pressing belt is fixed on the sliders, the lower pressure plate and its upper slider, the flat support plate and its upper slider are connected by second spring sheets.

3. The automobile exhaust pipe positioning and clamping structure according to claim 2 is characterized in that: The side thrust part includes a support rod fixed on the side wall of the moving platform, a groove plate is obliquely arranged at the end of the support rod away from the moving platform, a prism is slidably arranged in the groove plate, an arc-shaped pressure plate is arranged at one end of the prism, a limit plate is arranged at the other end of the prism, and the limit plate is connected to the support rod by a first spring, and the first spring is sleeved on the prism.

4. The automobile exhaust pipe positioning and clamping structure according to claim 3 is characterized in that: A spherical shell is arranged between the prism and the arc-shaped pressure plate, a moving disk is slidably arranged in the spherical shell, and the center point of the moving disk is located at the center of the spherical shell, and a plurality of second springs are arranged on the end surface of the moving disk, and the plurality of second springs are parallel to each other and fixedly connected to the inner wall of the spherical shell; The moving disk is provided with a push-pull column, which is connected to the arc-shaped pressure plate, and the end of the prism is fixedly connected to the outer wall of the spherical shell.

5. The automobile exhaust pipe positioning and clamping structure according to claim 4 is characterized in that: The arc-shaped pressing plate is hollow inside, and a plurality of suction holes are provided on the working surface of the arc-shaped pressing plate, and the suction holes are connected to the inside of the arc-shaped pressing plate; A piston is slidably arranged inside the arc-shaped pressing plate, and the piston divides the inner space of the arc-shaped pressing plate into an energy storage chamber and an adsorption chamber, and the adsorption chamber is connected to the suction hole, and the piston is connected to the inner wall of the arc-shaped pressing plate through a third elastic sheet, and an air pipe is arranged on the piston, and the end of the air pipe passes through the arc-shaped pressing plate and extends out, and a side hole is opened on the side wall of the air pipe; The push-pull column passes through the arc-shaped pressure plate and is fixedly connected to the piston.

6. The automobile exhaust pipe positioning and clamping structure according to claim 5, characterized in that: Clamps are arranged on both the upper and lower sides of the arc-shaped pressing plate. The clamps are rotatably connected to the arc-shaped pressing plate through two mutually parallel guide plates, and the clamps are rotatably connected to the ball shell through a push-pull rod.

7. The automobile exhaust pipe positioning and clamping structure according to claim 6, characterized in that: A first oblique arm is rotatably arranged on the frame, and a rotation connection point between the first oblique arm and the frame is located in the middle of the first oblique arm, and a rotation connection point of the first oblique arm is located in the middle of the two movable platforms. Second oblique arms are rotatably arranged at both ends of the first oblique arm, and the two second oblique arms are rotatably connected to the side walls of the two movable platforms respectively.

8. The automobile exhaust pipe positioning and clamping structure according to claim 7, characterized in that: A connecting arm is rotatably arranged on the side wall of each prism, a cylinder is arranged on the connecting arm, and a fixed end of the cylinder is installed on the frame.

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