Automobile exhaust pipe positioning and clamping structure

Abstract

The present application relates to the technical field of clamping equipment, in particular to a positioning and clamping structure for automobile exhaust pipe, which comprises a rack, two sets of positive clamping parts installed on the rack and side pushing parts installed on each set of positive clamping parts, the positive clamping parts are used for extruding and clamping the middle section of a Z-shaped pipe, and the side pushing parts are used for side extruding the side bending part of the Z-shaped pipe by using the bending characteristics of the Z-shaped pipe; the positive clamping part comprises a moving table slidingly installed on the rack, the sliding directions of the two moving tables of the two sets of positive clamping parts are opposite, a horizontal flat supporting plate is arranged on the side wall of the moving table, and a lower pressing plate is vertically and slidingly inserted into the top of the moving table; the middle section and the side bending part of the Z-shaped pipe are contacted by the two sets of positive clamping parts and the side pushing parts, so that the Z-shaped pipe can be accurately aligned, positioned and clamped, the positioning error is reduced, and the clamping strength and effectiveness are improved.

Description

Technical Field

[0001] This invention relates to the technical field of clamping devices, and in particular to a positioning and clamping structure for automotive exhaust pipes. Background Technology

[0002] With the continuous development of the automotive industry, the performance and reliability of automotive exhaust systems are receiving increasing attention. Exhaust systems not only affect engine performance and fuel economy, but also vehicle emission standards and driving comfort. In complex exhaust systems, Z-shaped pipes are a common design element, often used to solve problems such as space constraints and vibration absorption. However, the positioning and fixing of Z-shaped pipes has always been a challenge in design. Improper clamping structures can easily lead to the inability to accurately grind, weld, or drill holes in the pipes, thus easily causing exhaust leakage, increased noise, or even system failure.

[0003] Traditional exhaust pipe clamping structures often use simple bolt fixing or clamp connection. These methods have the following problems when dealing with the special geometry of Z-shaped pipes: Insufficient positioning accuracy: Due to the multi-angle bending of the Z-shaped tube, traditional clamping structures are difficult to align accurately, resulting in installation difficulties and positioning deviations; Insecurely fixed: It provides limited effective clamping for pipelines and can only serve a simple restraining function; Stress concentration: The clamping operation can only be achieved by applying strong compressive force to the clamping position on the pipeline, which can easily damage the pipeline. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a positioning and clamping structure for automotive exhaust pipes, the specific technical solution of which is as follows: According to a first aspect of the present invention, a positioning and clamping structure for an automotive exhaust pipe is provided, comprising a frame, two sets of positive clamping portions mounted on the frame, and a side pusher portion mounted on each set of positive clamping portions, wherein the positive clamping portions are used to clamp and compress the middle section of a Z-shaped pipe, and the side pusher portion is used to laterally compress the side-bent portion of the Z-shaped pipe by utilizing the bending characteristics of the Z-shaped pipe. The positive clamping part includes a movable platform that is slidably mounted on the frame. The two movable platforms on the two sets of positive clamping parts slide in opposite directions. A flat support plate is horizontally arranged on the side wall of the movable platform. A lower pressure plate is vertically slidably inserted into the top of the movable platform. The lower pressure plate is connected to the movable platform through a first spring piece. Multiple pressure bands are connected between the lower pressure plate and the flat support plate. The pressure bands are used to clamp and fix the middle section of the Z-shaped pipe. The flat support plate and the lower pressure plate are both provided with inclined edges at the ends of the flat support plate and the lower pressure plate that are away from the moving platform. The two sets of positive clamps move synchronously, and the two sets of side pushers move synchronously.

[0005] Furthermore, both the flat support plate and the lower pressure plate are slidably provided with sliders, the sliding direction of the sliders is perpendicular to the moving direction of the moving table, the end of the pressure band is fixed on the slider, and the lower pressure plate and its upper slider are connected by a second spring sheet.

[0006] Furthermore, the side pusher includes a support rod fixed to the side wall of the moving platform. The end of the support rod away from the moving platform is inclinedly provided with a groove plate. A prism is slidably provided in the groove plate. One end of the prism is provided with an arc-shaped pressure plate, and the other end of the prism is provided with a limiting plate. The limiting plate is connected to the support rod by a first spring, which is sleeved on the prism.

[0007] Furthermore, a spherical shell is provided between the prism and the arc-shaped pressure plate, and a moving disk is slidably provided inside the spherical shell. The center point of the moving disk is located at the center of the spherical shell, and multiple second springs are provided on the end face of the moving disk. The multiple second springs are parallel to each other and are all fixedly connected to the inner wall of the spherical shell. The motion disc is provided with push-pull columns, which are connected to the arc-shaped pressure plate. The end of the prism is fixedly connected to the outer wall of the spherical shell.

[0008] Furthermore, the arc-shaped pressure plate is hollow inside, and multiple suction holes are opened on the working surface of the arc-shaped pressure plate, which are connected to the inside of the arc-shaped pressure plate; A piston is slidably disposed inside the arc-shaped pressure plate. The piston divides the internal space of the arc-shaped pressure plate into an energy storage chamber and an adsorption chamber. The adsorption chamber is connected to the suction hole. The piston is connected to the inner wall of the arc-shaped pressure plate through a third spring sheet. An air pipe is disposed on the piston. The end of the air pipe passes through the arc-shaped pressure plate and extends out. 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 the upper and lower sides of the arc-shaped pressure plate. The clamping plates are rotatably connected to the arc-shaped pressure plate through two parallel guide plates, and the clamping plates are rotatably connected to the spherical shell through a push-pull rod.

[0010] Furthermore, a first inclined arm is rotatably mounted on the frame, and the rotatable connection point between the first inclined arm and the frame is located in the middle of the first inclined arm. The rotatable connection point of the first inclined arm is located in the middle of the two moving platforms. A second inclined arm is rotatably mounted on both ends of the first inclined arm, and the two second inclined arms are rotatably connected to the side walls of the two moving platforms respectively.

[0011] Furthermore, each prism has a rotatable connecting arm on its side wall, and a cylinder is mounted on the connecting arm, with the fixed end of the cylinder mounted on the frame.

[0012] The beneficial effects of this invention are as follows: By employing two sets of positive clamping and side-pushing sections to achieve multi-point contact with the middle and side-bend sections of the Z-shaped pipe, precise alignment, positioning, and clamping of the Z-shaped pipe are ensured, reducing positioning errors and improving clamping strength and effectiveness. The synchronous movement of the two sets of positive clamping and side-pushing sections ensures consistent positioning of the Z-shaped pipe in all directions, avoiding skewness and asymmetry problems caused by single-point fixing. The deformation design of the pressure band automatically adjusts the clamping shape and contact area according to the shape of the Z-shaped pipe, ensuring both effective fixing and preventing damage to the Z-shaped pipe due to excessive compression. The combined design of the positive clamping and side-pushing sections not only provides clamping force to the Z-shaped pipe in the horizontal direction by utilizing its shape characteristics, but also achieves precise clamping of the Z-shaped pipe in the vertical direction through the interaction of the inclined edges. The comprehensive positioning of the pipe ensures the stability of the Z-shaped pipe 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. Clamping is achieved through sliding and elastic deformation, making operation simple and requiring no complicated tools or equipment. The elastic deformation design of the pressure band allows it to adapt to Z-shaped pipes of different diameters, improving the versatility of the clamping structure. In summary, the above technical solution, through multi-point contact, synchronous movement, elastic clamping, and multi-directional positioning, solves the shortcomings of traditional clamping structures in terms of positioning accuracy, fixing effect, and stress concentration. These advantages make this clamping structure easier to operate and produce high-quality Z-shaped pipes in the automotive exhaust pipe processing, significantly improving the performance and reliability of the exhaust system. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the Z-shaped pipe clamping state in an embodiment of the present invention; Figure 3 This is a schematic diagram of the frame structure in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the front clamp and the side push part in an embodiment of the present invention; Figure 5 yes Figure 4 A structural diagram from another perspective; Figure 6 This is a schematic diagram of the side thrust section in an embodiment of the present invention; Figure 7 yes Figure 6 A cross-sectional structural diagram; Figure 8 This is a schematic diagram of the arc-shaped pressure plate in an embodiment of the present invention.

[0015] Figure label: 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; 9. Pressure band; 10. Beveled edge; 11. Slider; 12. Second spring; 13. Support rod; 14. Groove plate; 15. Prism; 16. Arc-shaped pressure plate; 17. Limiting plate; 18. First spring; 19. Spherical shell; 20. Moving plate; 21. Second spring; 22. Push-pull column; 23. Suction hole; 24. Piston; 25. Third spring; 26. Air pipe; 27. Side hole; 28. Clamping plate; 29. ​​Guide plate; 30. Push-pull rod; 31. First inclined arm; 32. Second inclined arm; 33. Cylinder; 34. Connecting arm. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0017] In the description of this invention, it should be noted that the orientations or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inner", and "outer" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0018] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. This embodiment is written in a progressive manner.

[0019] like Figures 1 to 8As shown, a positioning and clamping structure for an automotive exhaust pipe according to the present invention includes a frame 1, two sets of positive clamping parts 2 mounted on the frame 1, and a side pushing part 3 mounted on each set of positive clamping parts 2. The positive clamping parts 2 are used to squeeze and clamp the middle section of the Z-shaped pipe 4, and the side pushing part 3 is used to side-press the side-bent section of the Z-shaped pipe 4 by utilizing the bending characteristics of the Z-shaped pipe 4. The positive clamping part 2 includes a movable platform 5 slidably mounted on the frame 1. The sliding directions of the two movable platforms 5 on the two sets of positive clamping parts 2 are opposite. A flat support plate 6 is horizontally arranged on the side wall of the movable platform 5. A lower pressure plate 7 is vertically slidably inserted into the top of the movable platform 5. The lower pressure plate 7 is connected to the movable platform 5 through a first spring piece 8. Multiple pressure bands 9 are connected between the lower pressure plate 7 and the flat support plate 6. The pressure bands 9 are used to clamp and fix the middle section of the Z-shaped pipe 4. Among them, the end of the flat support plate 6 away from the moving platform 5 and the end of the lower pressure plate 7 away from the moving platform 5 are both provided with inclined edges 10, the two sets of positive clamping parts 2 move synchronously, and the two sets of side pushing parts 3 move synchronously.

[0020] In detail, the straight section in the middle of the Z-shaped pipe 4 is designated as the middle section. The straight sections on both sides of the Z-shaped pipe 4 form an angle with the middle section. Therefore, the sections on both sides of the Z-shaped pipe 4 are designated as side bends. After the two sets of positive clamps 2 clamp the middle section of the Z-shaped pipe 4, the two sets of side pushers 3 push and squeeze the two side bends of the Z-shaped pipe 4 outward. This allows the positive clamps 2 and the upper side pushers 3 to squeeze both sides of the angle formed by the middle section and the side bends of the Z-shaped pipe 4. In this way, the Z-shaped pipe 4 with its special shape can be squeezed and fixed. Furthermore, since the two sets of positive clamps 2 move synchronously and the two sets of side pushers 3 move synchronously, the synchronous positioning of the Z-shaped pipe 4 can be achieved.

[0021] The movable stage 5 on the clamping part 2 is slidably mounted on the frame 1. The two movable stages 5 on the two sets of clamping parts 2 move along the same trajectory and move synchronously relative to each other. When it is necessary to clamp and fix the middle section of the Z-shaped pipe 4, the movable stage 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 8, and the pressure band 9 on the movable stage 5 move synchronously. The lower pressure plate 7 and the flat support plate 6 are separated due to the action of the first spring 8. When the pressure band 9 contacts the outer wall of the middle section of the Z-shaped pipe 4, the Z-shaped pipe 4 squeezes the pressure band 9 in the opposite direction, so that the pressure band 9 gradually changes from a vertical line to an arc shape and adheres to the surface. On the outer wall of the Z-shaped pipe 4, this method can increase the contact area between the pressure band 9 and the Z-shaped pipe 4, making the Z-shaped pipe 4 more uniformly stressed. Multiple pressure bands 9 can be set to increase the range of force exerted on the Z-shaped pipe 4. When the pressure band 9 bends and deforms, it can pull the lower pressure plate 7 down. The lower pressure plate 7 and the flat support plate 6 approach each other, and the first spring piece 8 undergoes elastic deformation. The inclined edge 10 on the flat support plate 6 and the inclined edge 10 on the lower pressure plate 7 approach the outer wall of the Z-shaped pipe 4 and mutually support each other. At this time, the force exerted on the Z-shaped pipe 4 by the two inclined edges 10 is synchronously limited by the pressure band 9, thereby realizing the vertical constraint of the Z-shaped pipe 4.

[0022] It should be noted that when the two sets 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 exerted by the side pushers 3 on the Z-shaped pipe 4 cannot make the Z-shaped pipe 4 rotate between the two positive clamps 2. Furthermore, the restriction of the Z-shaped pipe 4 by the two sets of side pushers 3 cannot make the Z-shaped pipe 4 slide in the straight direction of the middle section of the Z-shaped pipe 4 between the two sets of positive clamps 2. Combined with the restriction of the Z-shaped pipe 4 in the vertical direction by the two inclined edges 10 on the positive clamps 2, the Z-shaped pipe 4 can be fully positioned and clamped.

[0023] Since the power for limiting the Z-shaped pipe 4 by the two inclined edges 10 on the positive clamping part 2 mainly comes from the deformation of the pressure band 9, and the deformation of the pressure band 9 mainly comes from the reverse extrusion of the Z-shaped pipe 4, this structure is relatively simple and has high clamping versatility.

[0024] By using two sets of positive clamping parts 2 and side pushing parts 3 to make multi-point contact with the middle and side-bend sections of the Z-shaped pipe 4, precise alignment, positioning, and clamping of the Z-shaped pipe 4 are ensured, reducing positioning errors and improving clamping strength and effectiveness. The synchronous movement of the two sets of positive clamping parts 2 and side pushing parts 3 ensures the positioning consistency of the Z-shaped pipe 4 in all directions, avoiding skewness and asymmetry caused by single-point fixing. The deformation design of the pressure band 9 can automatically adjust the clamping shape and contact area according to the shape of the Z-shaped pipe 4, ensuring both fixing effect and avoiding damage to the Z-shaped pipe 4 caused by excessive compression. The combined design of the positive clamping parts 2 and side pushing parts 3 not only provides 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 inclined edges 10. The system achieves comprehensive positioning of the Z-shaped pipe 4, ensuring its stability under various operating conditions. The entire clamping structure employs a modular design, allowing for independent replacement and adjustment of each component, reducing installation and maintenance difficulty. Clamping is achieved through sliding and elastic deformation, simplifying operation and eliminating the need for complex tools and equipment. The elastic deformation design of the pressure band 9 enables it to adapt to Z-shaped pipes of different diameters, improving the versatility of the clamping structure. In summary, the above technical solution, through multi-point contact, synchronous movement, elastic clamping, and multi-directional positioning, overcomes the shortcomings of traditional clamping structures in terms of positioning accuracy, fixing effect, and stress concentration. These advantages make the clamping structure easier to operate and produce high-quality Z-shaped pipes 4 during automotive exhaust pipe processing, significantly improving the performance and reliability of the exhaust system.

[0025] Furthermore, both the flat support plate 6 and the lower pressure plate 7 are slidably provided with sliders 11. The sliding direction of the sliders 11 is perpendicular to the moving direction of the moving table 5. The end of the pressure band 9 is fixed on the sliders 11. The lower pressure plate 7 and its upper sliders 11, and the flat support plate 6 and its upper sliders 11 are connected by the second spring sheet 12.

[0026] In detail, when the clamping position of the two sets of positive clamping parts 2 on the middle section of the Z-shaped pipe 4 is not at the midpoint of the middle section, the two sets of side pushing parts 3 move synchronously to both sides and squeeze the two side bends of the Z-shaped pipe 4. The Z-shaped pipe 4 will move on the two sets of positive clamping parts 2, that is, the middle section of the Z-shaped pipe 4 will move between the two sets of positive clamping parts 2 until the middle section of the Z-shaped pipe 4 coincides with the clamping position of the positive clamping parts 2. This realizes the positioning and clamping work of the Z-shaped pipe 4. When the Z-shaped pipe 4 moves on the positive clamping parts 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 pressure band 9. This facilitates the adjustment of the position of the Z-shaped pipe 4 and avoids the friction between the Z-shaped pipe 4 and the pressure band 9, which makes it difficult for the Z-shaped pipe 4 to move and affects the positioning work of the Z-shaped pipe 4. The second spring piece 12 on the slider 11 can help the slider 11 to reset.

[0027] Furthermore, the side pusher 3 includes a support rod 13 fixed to the side wall of the moving platform 5. The end of the support rod 13 away from the moving platform 5 is provided with an inclined groove plate 14. A prism 15 is slidably arranged in the groove plate 14. An arc-shaped pressure plate 16 is provided at one end of the prism 15, and a limiting plate 17 is provided at the other end of the prism 15. The limiting plate 17 is connected to the support rod 13 by a first spring 18, which is sleeved on the prism 15.

[0028] In detail, the slotted plate 14 and the prism 15 are inclined, and the arc-shaped pressure plate 16 is located on the prism 15 near the moving platform 5. In its 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 trajectory of the moving platform 5, the prism 15 will push the moving platform 5 to move through the first spring 18, the slotted plate 14 and the support rod 13, thereby providing the moving power for the positive clamping part 2. When the positive clamping part 2 completes the clamping of the Z-shaped pipe 4 and stops moving, it continues to apply force to the prism 15. Due to the inclination of the prism 15, the prism 15 will slide on the slot plate 14 against the elastic force of the first spring 18. The prism 15 pushes the arc-shaped pressure plate 16 toward the side bend of the Z-shaped pipe 4 and squeezes it. Thus, the prism 15 can be used to provide power to the clamping part 2 and the side pushing part 3 directly, without having to provide power to the clamping part 2 and the side pushing part 3 separately. This is convenient for operation. The limiting plate 17 can provide support for the first spring 18 and limit the prism 15.

[0029] 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 inside the spherical shell 19, and the center point of the moving disk 20 is located at the center of the spherical shell 19. A plurality of second springs 21 are provided on the end face of the moving disk 20. The plurality of second springs 21 are parallel to each other and are all fixedly connected to the inner wall of the spherical shell 19. The motion disc 20 is provided with a push-pull column 22, which is connected to the arc-shaped pressure plate 16. The end of the prism 15 is fixedly connected to the outer wall of the spherical shell 19.

[0030] In detail, because the bending angles of the side bends of the Z-shaped pipe 4 are different, and the fixed height of the Z-shaped pipe 4 in the vertical direction is different, when the curved pressure plate 16 is used to push the side bends of the Z-shaped pipe 4, the curved surface of the curved pressure plate 16 needs to contact the outer wall of the side bend of the Z-shaped pipe 4. This means that the curved surface of the curved pressure plate 16 needs to always face the outer wall of the Z-shaped pipe 4. That is, the direction of the curved pressure plate 16 needs to change according to the position of the curved pressure plate 16. Therefore, the curved pressure plate 16 needs to be able to move in any direction on the spherical shell 19. The movement of the curved pressure plate 16 can be achieved by the reaction force of the Z-shaped pipe 4 on the curved pressure plate 16.

[0031] When the orientation of the arc-shaped pressure plate 16 changes, the arc-shaped pressure plate 16 will drive the moving plate 20 to move inside the spherical shell 19 through the push-pull column 22. Since the center point of the moving plate 20 is located at the center of the spherical shell 19, the moving plate 20 can move arbitrarily on the inner wall of the spherical shell 19. The main function of the multiple second springs 21 is to provide the moving plate 20 with the restoring elastic force.

[0032] Furthermore, the arc-shaped pressure plate 16 is hollow inside, and a plurality of suction holes 23 are provided on the working surface of the arc-shaped pressure plate 16, the suction holes 23 being connected to the interior of the arc-shaped pressure plate 16; A piston 24 is slidably disposed inside the arc-shaped pressure plate 16. The piston 24 divides the internal space of the arc-shaped pressure 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 pressure plate 16 through a third spring piece 25. An air pipe 26 is disposed on the piston 24. The end of the air pipe 26 passes through the arc-shaped pressure plate 16 and extends out. 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.

[0033] In detail, when the push-pull column 22 pushes the arc-shaped pressure plate 16 to press against the side bend of the Z-shaped pipe 4, the arc-shaped 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 plate 25 to undergo elastic deformation. The space of the adsorption chamber decreases and the space of the energy storage chamber increases. A negative pressure is formed inside the energy storage chamber. 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-shaped 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 communicate with the outside. 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. The negative pressure adsorbs and fixes the Z-shaped pipe 4 through the suction hole 23.

[0034] The main function of the third spring plate 25 is to reset the piston 24 within the arc-shaped pressure plate 16 in its natural state.

[0035] Furthermore, clamping plates 28 are provided on both the upper and lower sides of the arc-shaped pressure plate 16. The clamping plates 28 and the arc-shaped pressure plate 16 are rotatably connected by two parallel guide plates 29. The clamping plates 28 and the spherical shell 19 are rotatably connected by a push-pull rod 30.

[0036] In detail, the two ends of the push-pull rod 30 are rotatably connected to the spherical shell 19 and the clamping plate 28, respectively. This rotatable connection is achieved by rotating the ball, allowing the clamping plate 28 to move in any direction on the spherical shell 19. When the arc-shaped pressure plate 16 contacts the outer wall of the Z-shaped pipe 4 and stops moving, the spherical shell 19 continues to move and pushes the piston 24 to move through the push-pull column 22. At this time, the spherical 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, causing the clamping plate 28 to be translated and fastened to the outer wall of the Z-shaped pipe 4. This allows the two clamping plates 28 to clamp and fix the side bend of the Z-shaped pipe 4 in the vertical direction, improving the fixing strength of the Z-shaped pipe 4. This clamping method is mainly achieved by the relative movement of the arc-shaped pressure plate 16 and the spherical shell 19, which makes the equipment more comprehensive based on the original movement form.

[0037] Furthermore, a first inclined arm 31 is rotatably mounted on the frame 1, and the rotatable connection point between the first inclined arm 31 and the frame 1 is located in the middle of the first inclined arm 31. The rotatable connection point of the first inclined arm 31 is located in the middle of the two moving platforms 5. A second inclined arm 32 is rotatably mounted on both ends of the first inclined arm 31, and the two second inclined arms 32 are rotatably connected to the side walls of the two moving platforms 5 respectively.

[0038] In detail, when one moving stage 5 slides on the frame 1, it can drive another moving stage 5 to move synchronously relative to it through the first inclined arm 31 and the two second inclined arms 32, thereby causing the two sets of positive clamps 2 to move synchronously in opposite directions, so as to achieve the purpose of positioning the Z-shaped pipe 4 by using the two positive clamps 2.

[0039] Furthermore, each prism 15 is rotatably provided with a connecting arm 34 on its side wall, and a cylinder 33 is provided on the connecting arm 34. The fixed end of the cylinder 33 is installed on the frame 1.

[0040] In detail, the cylinder 33 can provide the prism 15 with the moving power through the connecting arm 34, thereby making the clamping part 2 and the side pushing part 3 run. Since the movement trajectory of the prism 15 is inclined, the connecting arm 34 is needed to realize the connection work.

[0041] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A positioning and clamping structure for an automotive exhaust pipe, characterized in that, It includes a frame, two sets of positive clamps mounted on the frame, and a side pusher mounted on each set of positive clamps. The positive 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 includes a movable platform that is slidably mounted on the frame. The two movable platforms on the two sets of positive clamping parts slide in opposite directions. A flat support plate is horizontally arranged on the side wall of the movable platform. A lower pressure plate is vertically slidably inserted into the top of the movable platform. The lower pressure plate is connected to the movable platform through a first spring piece. Multiple pressure bands are connected between the lower pressure plate and the flat support plate. The pressure bands are used to clamp and fix the middle section of the Z-shaped pipe. Among them, the ends of the flat support plate away from the moving platform and the ends of the lower pressure plate away from the moving platform are both provided with inclined edges, the two sets of positive clamping parts move synchronously, and the two sets of side pushing parts move synchronously. The side push part includes a support rod fixed to the side wall of the moving platform. The end of the support rod away from the moving platform is inclinedly provided with a groove plate. A prism is slidably provided in the groove plate. One end of the prism is provided with an arc-shaped pressure plate. The other end of the prism is provided with a limit plate. The limit plate is connected to the support rod by a first spring. The first spring is sleeved on the prism. A spherical shell is provided between the prism and the arc-shaped pressure plate. A moving disk is slidably provided inside the spherical shell, and the center point of the moving disk is located at the center of the spherical shell. Multiple second springs are provided on the end face of the moving disk. The multiple second springs are parallel to each other and are all fixedly connected to the inner wall of the spherical shell. The motion disc is provided with push-pull columns, which are connected to the arc-shaped pressure plate. The end of the prism is fixedly connected to the outer wall of the spherical shell.

2. The automotive exhaust pipe positioning and clamping structure according to claim 1, characterized in that, Both the flat support plate and the lower pressure plate are slidably equipped with sliders. The sliding direction of the sliders is perpendicular to the moving direction of the moving table. The end of the pressure band is fixed on the slider. The lower pressure plate and its upper slider, as well as the flat support plate and its upper slider, are connected by a second spring sheet.

3. The automotive exhaust pipe positioning and clamping structure according to claim 2, characterized in that, The arc-shaped pressure plate is hollow inside, and multiple suction holes are opened on the working surface of the arc-shaped pressure plate, which are connected to the inside of the arc-shaped pressure plate. A piston is slidably disposed inside the arc-shaped pressure plate. The piston divides the internal space of the arc-shaped pressure plate into an energy storage chamber and an adsorption chamber. The adsorption chamber is connected to the suction hole. The piston is connected to the inner wall of the arc-shaped pressure plate through a third spring sheet. An air pipe is disposed on the piston. The end of the air pipe passes through the arc-shaped pressure plate and extends out. 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.

4. The automotive exhaust pipe positioning and clamping structure according to claim 3, characterized in that, The upper and lower sides of the arc-shaped pressure plate are provided with clamping plates. The clamping plates and the arc-shaped pressure plate are rotatably connected by two parallel guide plates. The clamping plates and the spherical shell are rotatably connected by push-pull rods.

5. The automotive exhaust pipe positioning and clamping structure according to claim 4, characterized in that, A first inclined arm is rotatably mounted on the frame, and the rotatable connection point between the first inclined arm and the frame is located in the middle of the first inclined arm. The rotatable connection point of the first inclined arm is located in the middle of the two moving platforms. A second inclined arm is rotatably mounted at both ends of the first inclined arm, and the two second inclined arms are rotatably connected to the side walls of the two moving platforms respectively.

6. The automotive exhaust pipe positioning and clamping structure according to claim 5, characterized in that, Each prism has a connecting arm rotatably mounted on its side wall, and a cylinder is mounted on the connecting arm. The fixed end of the cylinder is mounted on the frame.

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