Punching device for motorcycle exhaust muffler

Abstract

The application discloses a punching device for motorcycle exhaust muffler pipes and particularly relates to the technical field of punching devices, which comprises a supporting frame, a clamping and punching assembly arranged on the supporting frame, the clamping and punching assembly comprising a central cylinder arranged in the supporting frame, one end of the central cylinder being provided with an adjusting circular truncated cone cylinder, and a plurality of clamping blocks being arranged on the middle part of the adjusting circular truncated cone cylinder. The clamping blocks can be synchronously contracted or expanded along the radial direction, and the arc-shaped fitting grooves on the clamping blocks and the rubber pads can stably clamp the motorcycle exhaust muffler pipes with a certain range of outer diameter differences. The punching device can solve the problem that the traditional punching device can only be adapted to single-specification pipes and the time-consuming replacement of molds, greatly improve the universality of the equipment, simultaneously punch different positions of the same section of the muffler pipe, and automatically feed the slip ring through the motor-driven screw rod, so that the clamping, angle adjustment, punching and resetting linkage operation can be completed, manual intervention is reduced, and the operation strength is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of punching device, more particularly, the present application relates to the motorcycle exhaust muffler punching device. BACKGROUND

[0002] The motorcycle exhaust muffler (also known as the silencer) is a device installed at the end of the exhaust pipe, which mainly functions to reduce the noise generated during engine exhaust, while assisting the exhaust system to complete the exhaust emission. Its interior is usually composed of multiple chambers, partitions, sound-absorbing materials (such as glass fiber, rock wool), and perforated pipes, etc. structures, which attenuate the high-frequency, high-intensity noise generated by the exhaust gas flow through physical principles (such as sound wave reflection, interference, absorption), so that the motorcycle noise meets the environmental protection and traffic regulations requirements.

[0003] The high-temperature and high-pressure gas flow discharged by the engine generates strong sound waves, and when the gas flow passes through the punched hole of the muffler, part of the sound waves will enter the chamber behind the punched hole. Due to the "resonance structure" formed by the internal space of the chamber and the punched hole, different frequency sound waves are reflected and superimposed in the chamber, and part of the sound waves will be cancelled (interference sound attenuation) due to opposite phases, thereby reducing the noise intensity;

[0004] Currently, many mufflers are filled with sound-absorbing materials (such as glass fiber), but the muffler is a complete pipe body, which is not easy for sound waves to more evenly contact the sound-absorbing materials. Therefore, a motorcycle exhaust muffler punching device is provided. SUMMARY

[0005] In order to overcome the above-mentioned defects of the prior art, the present application provides a motorcycle exhaust muffler punching device, which aims to solve the problems raised in the background art.

[0006] The present application provides the following technical scheme: a motorcycle exhaust muffler punching device, comprising a support frame, a clamping and punching assembly is arranged on the support frame;

[0007] The clamping and punching assembly comprises a center cylinder arranged in the support frame, one end of the center cylinder is provided with an adjusting circular cone cylinder, and a plurality of clamping blocks are arranged in the middle of the adjusting circular cone cylinder, one side of each of the plurality of clamping blocks is provided with an inclined sliding groove, and a hydraulic rod for punching is arranged in each of the inclined sliding grooves, and a punch is arranged at the output end of each of the hydraulic rods;

[0008] The end of the hydraulic rod away from the punch is provided with a sliding rod, the outer side of the adjusting circular cone cylinder is sleeved with a sliding ring, a plurality of sliding cylinders are arranged on the inner wall of the sliding ring, and one end of each of the sliding rods extends into the middle of the corresponding sliding cylinder and is slidably connected with the sliding cylinder, and a spring is sleeved on the outer side of the sliding rod;

[0009] The inner wall of the adjusting frustum cylinder is fixedly provided with a plurality of inclined sliding blocks, and a plurality of staggered openings extending to the surface of the adjusting frustum cylinder are respectively formed in the inclined sliding blocks.

[0010] Optionally, in possible embodiments, the middle part of the center cylinder is provided with a center supporting rod, and each clamping block is distributed along the axial circumference of the center supporting rod, and a matching groove is formed in the side of the clamping block away from the inclined sliding groove, the outer side of each punch is sleeved with a punching ring, and the bottom of each punching ring is provided with a pressurizing taper block, the vertical cross-sectional shape of the pressurizing taper block is frustum-shaped and is sleeved on the outer side of the punch, a plurality of slag discharge holes are formed in the outer side of the center supporting rod, and a grommet is arranged in each slag discharge hole, the middle part of the supporting frame is provided with two limiting rings, each limiting ring is sleeved on the outer side of the center cylinder and is rotationally connected with the center cylinder, the two limiting rings are arranged side by side, and the bottom side of one of the limiting rings is provided with a motor, the output end of the motor is provided with a lead screw, one end of the lead screw penetrates through a sliding ring and extends to the side of the inner wall of the supporting frame and is rotationally connected with the supporting frame, and the sliding ring is threadedly connected with the lead screw;

[0011] Optionally, in possible embodiments, the end of the supporting frame away from the adjusting frustum cylinder is fixedly provided with a gear disc, the top side of the gear disc is provided with a servo motor, the output end of the servo motor is provided with a bevel gear, the bevel gear is located on one side of the gear disc and is engaged with the gear disc, the servo motor is installed in the supporting frame through bolts, one end of the supporting frame is provided with a constraint ring, the constraint ring is sleeved on the outer side of the adjusting frustum cylinder and is rotationally connected with the adjusting frustum cylinder, the vertical cross-sectional shape of the adjusting frustum cylinder is frustum-shaped, the vertical cross-sectional shapes of the inclined sliding block and the inclined sliding groove are both triangular, and the clamping block is slidably connected with the inclined sliding groove and the inclined sliding block through the inclined sliding groove;

[0012] The technical effects and advantages of the present application are as follows:

[0013] 1. By matching the inclined surfaces of the adjusting frustum cylinder inner wall inclined sliding block and the clamping block inclined sliding groove, the present application synchronously drives multiple clamping blocks to synchronously shrink or expand along the radial direction, on this basis, multiple clamping blocks are evenly distributed along the circumference, through the triangular inclined surface guidance of the inclined sliding block and the inclined sliding groove, the uniform transmission of radial force is realized, and during the clamping process, the pre-tightening force of the spring is matched to make the matching groove tightly match with the outer wall of the silencer, avoiding the shaking of the pipe fitting during punching; at the same time, the meshing transmission of the servo motor and the gear disc through the bevel gear can realize angle adjustment, combined with the radial limiting of the center cylinder and the adjusting frustum cylinder by the limiting ring and the constraint ring, the punching precision is significantly improved;

[0014] 2、 The multiple hydraulic rods and punches of the present application are distributed circumferentially through corresponding clamping blocks, can simultaneously punch different positions of the same section of the muffler, and further realize automatic feeding of the sliding ring through the motor-driven screw rod, so that clamping, angle adjustment, punching and reset linkage operation can be completed, manual intervention is reduced, and operation strength is reduced.

[0015] 3、 The central supporting rod of the present application supports the inner wall of the muffler, avoiding bending due to self-weight when punching the long pipe; the sliding fit of the slide rod and the slide cylinder and the reset action of the spring ensure that the hydraulic rod quickly returns after punching, reducing the collision and wear between parts; the staggered opening provides moving space for the hydraulic rod, avoiding interference with the adjusting circular cone cylinder, and improving the punching convenience.

[0016] 4、 The present application combines the arc-shaped fitting groove and rubber pad on the clamping block to assist in centering on the basis of self-adaptive clamping, which can stably clamp the motorcycle exhaust muffler with a certain range of outer diameter difference, solving the problem of time-consuming replacement of molds in traditional punching devices that can only adapt to single specification pipe, and greatly improving the versatility of the equipment.

[0017] 5、 The punch in the process of punching the workpiece, the pressure cone block is in contact with the workpiece, so that the workpiece is deformed by the contour of the pressure cone block, and the punch ring and the grommet are fitted to punch the workpiece, which can effectively ensure the flatness of the punching, avoid burr phenomenon, and ensure the punching quality.

[0018] In summary, the multiple clamping blocks can be driven to synchronously contract or expand radially, and the arc-shaped fitting groove and rubber pad on the clamping block can stably clamp the motorcycle exhaust muffler with a certain range of outer diameter difference, solving the problem of time-consuming replacement of molds in traditional punching devices that can only adapt to single specification pipe, and greatly improving the versatility of the equipment. The same section of the muffler can be punched simultaneously, and the sliding ring can be automatically fed through the motor-driven screw rod, so that clamping, angle adjustment, punching and reset linkage operation can be completed, manual intervention is reduced, and operation strength is reduced. The servo motor can realize angle adjustment through the meshing transmission of the bevel gear and the toothed disc, and the radial position of the center cylinder and the adjusting circular cone cylinder is limited by the limiting ring and the constraint ring, which significantly improves the punching precision. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present disclosure, the following will briefly introduce the drawings needed in some embodiments. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can also be obtained by those skilled in the art according to these drawings. In addition, the drawings in the following description can be regarded as schematic diagrams, and are not limited to the actual size of the product, the actual flow of the method, the actual timing of the signal, etc.

[0020] Figure 1 This is a front view of the overall structure of the present invention.

[0021] Figure 2 This is a side view of the clamping and punching assembly of the present invention.

[0022] Figure 3 This is a schematic diagram of the clamping and punching assembly of the present invention.

[0023] Figure 4 This is a side view of the toothed disc, constraint ring, adjusting frustum cylinder, inclined slider, and punch of the present invention.

[0024] Figure 5 This is a schematic diagram of the central cylinder, adjusting frustum cylinder, central support rod, and inclined slider of the present invention.

[0025] Figure 6 This is a schematic diagram of the clamping block, slip ring, hydraulic rod, slide cylinder, and spring of the present invention.

[0026] Figure 7 For the present invention Figure 6 Side view.

[0027] Figure 8 For the present invention Figure 7 A schematic diagram of the partial structure at point A in the middle.

[0028] The attached diagram is labeled as follows: 1. Support frame; 2. Central cylinder; 3. Adjusting frustum cylinder; 4. Clamping block; 5. Inclined slide groove; 6. Hydraulic rod; 7. Slide rod; 8. Slide cylinder; 9. Spring; 10. Punch; 11. Inclined slider; 12. Misalignment opening; 13. Central support rod; 14. Slip ring; 15. Motor; 16. Lead screw; 17. Gear disc; 18. Servo motor; 19. Bevel gear; 20. Limiting ring; 21. Constraint ring; 22. Fitting groove; 23. Punching ring; 24. Pressurizing cone block; 25. Slag discharge hole; 26. Washer ring. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] This embodiment discloses a punching device for motorcycle exhaust mufflers, aiming to solve the problems of unstable clamping, inconvenient adjustment of punching angle, and low punching efficiency in the existing muffler punching process. Its specific structure and working principle are as follows:

[0031] Example 1

[0032] As Figure 1 shown, the device comprises a support frame 1, a clamping and punching assembly, and a driving assembly, and each component cooperates to realize the clamping and punching operation of the sound attenuation pipe.

[0033] Support frame 1: a steel plate can be welded into a rectangular frame structure, and the bottom can be fixed on the workbench by expansion bolts. The middle part of the support frame 1 is rotatably connected with two limiting rings 20 through bearings, as shown in Figure 2 , the limiting ring 20 is an annular structure, and the inner ring is rotatably connected with the center cylinder 2 through gap cooperation, which is used to limit the axial displacement of the center cylinder 2.

[0034] As Figure 3 , Figure 5 shown, the clamping and punching assembly comprises:

[0035] Center cylinder 2: one end is welded and fixed with adjusting circular truncated cone cylinder 3, and the other end is connected with gear disc 17 through a flat key. The middle part of the center cylinder 2 is welded with a center supporting rod 13, which is a circular rod extending along the axial direction of the center cylinder 2, used to support the inner wall of the sound attenuation pipe.

[0036] Adjusting circular truncated cone cylinder 3: the vertical section is a circular truncated cone, as shown in Figure 5 , the small diameter end is welded with the center cylinder 2, and the large diameter end faces the feeding direction of the sound attenuation pipe. Its inner wall is uniformly welded with several inclined sliding blocks 11 along the circumference. The vertical section of the inclined sliding block 11 is a right triangle, and a staggered hole 12 is formed through it, as shown in Figure 5 , the staggered hole 12 is a long strip-shaped through hole, which is used to avoid the moving track of the hydraulic rod 6.

[0037] Clamping block 4: uniformly distributed along the circumference of the adjusting circular truncated cone cylinder 3, as shown in Figure 6 . The side close to the inclined sliding block 11 of the clamping block 4 is provided with an inclined sliding groove 5, which cooperates with the inclined surface of the inclined sliding block 11 and can slide radially along the inclined sliding block 11. The side away from the inclined sliding groove 5 is provided with a fitting groove 22, as shown in Figure 6 , the fitting groove 22 is arc-shaped, and the radius matches the outer diameter of the sound attenuation pipe. Rubber pads can be pasted in the groove to increase the friction.

[0038] As Figure 6 , Figure 7 shown, the inclined sliding groove 5 of each clamping block 4 is fixed with a hydraulic rod 6 through a bolt. The hydraulic rod 6 can be selected as a small hydraulic oil cylinder HOB4050, and the output end is connected with a punch 10 through a thread. The end of the hydraulic rod 6 away from the punch 10 is welded with a sliding rod 7, and the sliding rod 7 is provided with a spring 9 outside the sleeve. The other end of the sliding rod 7 is inserted into the sliding cylinder 8. The sliding cylinder 8 is a hollow cylinder, which is distributed and welded along the inner wall of the sliding ring 14. The sliding rod 7 and the sliding cylinder 8 are gap cooperated to realize sliding connection.

[0039] Sliding ring 14: annular structure, as shown in Figure 6As shown, the sleeve is set outside the adjusting circular table cylinder 3, the inner wall is matched with the adjusting circular table cylinder 3 gap, the outer wall is connected with the output shaft of the screw rod 16 through the thread, and can move along the adjusting circular table cylinder 3 axial direction.

[0040] As shown in the figure, Figure 1 , Figure 4 The end of the support frame 1 away from the adjusting circular table cylinder 3 is fixed with a servo motor 18 by bolt, the output end of the servo motor 18 is connected with bevel gear 19 through coupling, the bevel gear 19 is engaged with the toothed disc 17, the toothed disc 17 is welded on the end of the center cylinder 2, the rotation angle control of the center cylinder 2 is realized by driving the servo motor 18.

[0041] As shown in the figure, Figure 2 One of the limit ring 20 bottom is fixed with a motor 15 through the motor base, the motor 15 can be selected as RS-550 DC motor, the output end of the motor 15 is connected with the screw rod 16 through the speed reducer, the screw rod 14 is matched with the thread of the outer wall of the slip ring 14, the axial feeding of the slip ring 14 is realized.

[0042] Restraining ring 21: as shown in the figure, Figure 4 The restraining ring 21 is sleeved outside the large diameter end of the adjusting circular table cylinder 3 through the bearing, the bottom is welded with the support frame 1 through the support, which is used to limit the radial swing of the adjusting circular table cylinder 3.

[0043] Example 2

[0044] As shown in the figure, Figure 8 The outer side of the plurality of punches 10 is sleeved with the punching ring 23, and the bottom of each punching ring 23 is provided with a pressing taper block 24. The deformation area is cut off when the punching ring 23 punches the hole, so as to ensure the punching quality; the vertical section shape of the pressing taper block 24 is set as a circular truncated cone and is sleeved outside the punch 10. The pressing taper block 24 is in contact with the workpiece in the process of the punch 10 pressing, so as to facilitate the deformation of the workpiece according to the contour of the pressing taper block 24. The outer side of the center supporting rod 13 is provided with a plurality of slag discharge holes 25, and each slag discharge hole 25 is provided with a grommet 26. The slag discharge hole 25 is used to stagger the interference between the punch 10 and the center supporting rod 13, and also facilitates the extension of the deformation area of the workpiece into the slag discharge hole 25. The setting of the grommet 26 can support the punching ring 23, so as to facilitate the punching of the workpiece by the lamination of the punching ring 23 and the grommet 26, and the punching of the workpiece by the contour deformation of the pressing taper block 24 and the punching of the workpiece by the punching ring 23 can effectively ensure the flatness of the punching and avoid the burr phenomenon of the punching.

[0045] The specific working principle is as follows: the motorcycle exhaust muffler to be punched is sleeved on the center supporting rod 13, and the end of the muffler is aligned with the large-diameter end of the adjusting circular table cylinder 3. The motor 15 is started, which drives the lead screw 16 to rotate through the speed reducer, and the threads of the lead screw 16 drive the sliding ring 14 to move towards the large-diameter end of the adjusting circular table cylinder 3; the sliding ring 14 pushes the sliding rod 7 through the sliding cylinder 8, so that the hydraulic rod 6 slides inwards along the inclined sliding groove 5 of the inclined sliding block 11, and drives the clamping block 4 to contract radially until the groove 22 is tightly attached to the outer wall of the muffler, and the clamping is completed, as shown in Figure 6 、 Figure 7 and

[0046] According to the punching position requirement, the servo motor 18 is sent a pulse signal through the PLC, the servo motor 18 drives the bevel gear 19 to rotate, the bevel gear 19 drives the gear disc 17 and the center cylinder 2 to rotate, so that the muffler is rotated to a preset angle; the limiting ring 20 ensures the axial position of the center cylinder 2 stable when rotating, as shown in Figure 1 、 Figure 2 and

[0047] After the angle is in place, the hydraulic system supplies oil to the hydraulic rod 6, the output end of the hydraulic rod 6 extends, and drives the punch 10 to move towards the outer wall of the muffler, the punch 10 completes the punching of the through hole within 1.5 seconds, and the offset port 12 provides a moving space for the hydraulic rod 6 during the punching process to avoid interference with the adjusting circular table cylinder 3, as shown in Figure 5 .

[0048] In addition, the pressurizing taper block 24 is in contact with the workpiece during the pressing process of the punch 10, so as to facilitate the deformation of the workpiece through the profile of the pressurizing taper block 24, the slag hole 25 is used to offset the interference between the punch 10 and the center supporting rod 13, and also facilitates the extension of the deformation area of the workpiece into the slag hole 25, and the setting of the grommet 26 can support the punching ring 23, so as to facilitate the punching of the workpiece by the punching ring 23 and the grommet 26, and through the deformation of the workpiece through the profile of the pressurizing taper block 24 and then the punching of the workpiece by the punching ring 23, the punching flatness can be effectively ensured, and the burr phenomenon can be avoided.

[0049] After the punching is completed, the hydraulic rod 6 is depressurized and retracted, the spring 9 pushes the sliding rod 7 to reset under the action of the elastic force, drives the hydraulic rod 6 and the punch 10 to retreat to the initial position; if punching is needed at other positions, steps 2-3 are repeated; if all punching is completed, the motor 15 is reversed, the lead screw 16 drives the sliding ring 14 to move in the opposite direction, the clamping block 4 is loosened, the muffler is removed, and the whole working cycle is completed;

[0050] And the vertical section shape of the inclined sliding block 11 and the inclined sliding groove 5 is triangular, so that when the clamping block 4 is guided and displaced along the inclined sliding block 11, each clamping block 4 can be gathered to the axis of the central supporting rod 13 by the elasticity of the spring 9 itself, not only can adapt to different thickness of the silencer pipe, but also through the reciprocating displacement of the clamping block 4, the silencer pipe loses the limit, the staff can pull the silencer pipe, realize the function of punching the silencer pipe at different positions.

[0051] The above is only the preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A punching device for motorcycle exhaust muffler pipe, comprising a support frame (1), characterized in that: The support frame (1) is provided with a clamping punch assembly; The clamping punching assembly includes a central cylinder (2) disposed in a support frame (1). One end of the central cylinder (2) is provided with an adjusting frustum cylinder (3), and a plurality of clamping blocks (4) are distributed in the middle of the adjusting frustum cylinder (3). An inclined slide groove (5) is provided on one side of each of the clamping blocks (4), and a hydraulic rod (6) for punching is provided in each of the inclined slide grooves (5), and a punch (10) is provided at the output end of each of the hydraulic rods (6). The hydraulic rod (6) is provided with a slide rod (7) at the end away from the punch (10). The outer side of the adjusting truncated cone (3) is fitted with a slip ring (14). The inner wall of the slip ring (14) is provided with a plurality of slide cylinders (8). One end of each slide rod (7) extends to the middle of the corresponding slide cylinder (8) and is slidably connected to the slide cylinder (8). The outer side of the slide rod (7) is fitted with a spring (9). The inner wall of the adjusting truncated cone (3) is fixedly provided with a number of inclined sliders (11), and each of the inclined sliders (11) is provided with a number of misaligned openings (12) that extend to the surface of the adjusting truncated cone (3), and the multiple hydraulic rods (6) are respectively located in the corresponding misaligned openings (12).

2. The motorcycle exhaust muffler punching device according to claim 1, characterized in that: A central support rod (13) is provided in the middle of the central cylinder (2), and each clamping block (4) extends circumferentially along the central support rod (13). A fitting groove (22) is provided on the side of the clamping block (4) away from the inclined slide groove (5). A punching ring (23) is provided on the outer side of each punch (10), and a pressure cone block (24) is provided at the bottom of each punching ring (23). The vertical section of the pressure cone block (24) is set as a frustum and is fitted on the outer side of the punch (10). A number of slag discharge holes (25) are provided on the outer side of the central support rod (13), and a gasket (26) is provided in each slag discharge hole (25).

3. The motorcycle exhaust muffler punching device according to claim 1, characterized in that: The support frame (1) is provided with two limiting rings (20) in the middle, and each of the limiting rings (20) is sleeved on the outside of the central cylinder (2) and rotatably connected to the central cylinder (2).

4. The motorcycle exhaust muffler punching device according to claim 3, characterized in that: Two limiting rings (20) are arranged side by side, and a motor (15) is provided on one side of the bottom of one of the limiting rings (20). A lead screw (16) is provided at the output end of the motor (15). One end of the lead screw (16) passes through the slip ring (14) and extends to one side of the inner wall of the support frame (1) and is rotatably connected to the support frame (1). The slip ring (14) is threadedly connected to the lead screw (16).

5. The motorcycle exhaust muffler punching device according to claim 1, characterized in that: A gear plate (17) is fixedly installed at one end of the support frame (1) away from the adjusting truncated cone (3). A servo motor (18) is installed on one side of the top of the gear plate (17), and a bevel gear (19) is installed at the output end of the servo motor (18).

6. The motorcycle exhaust muffler punching device according to claim 5, characterized in that: The bevel gear (19) is located on one side of the gear plate (17) and meshes with the gear plate (17). The servo motor (18) is installed in the support frame (1) by bolts.

7. The motorcycle exhaust muffler punching device according to claim 1, characterized in that: One end of the support frame (1) is provided with a constraint ring (21), which is sleeved on the outside of the adjusting frustum (3) and rotatably connected to the adjusting frustum (3).

8. The motorcycle exhaust muffler punching device according to claim 1, characterized in that: The vertical cross-sectional shape of the adjusting truncated cone (3) is set to a truncated cone shape, and the vertical cross-sectional shape of the inclined slider (11) and the inclined groove (5) are both set to a triangle shape. The clamping block (4) is slidably connected to the inclined slider (11) through the inclined groove (5).

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