Inner wall polishing device for tail gas pipe production
By designing a telescopic shaft assembly and an adjustable base structure, the problem of adapting existing exhaust pipe production equipment to different lengths and inner diameters has been solved, achieving flexible polishing adaptability and reducing operational complexity and cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING SHIDA JINLUN AUTO PARTS CO LTD
- Filing Date
- 2025-06-06
- Publication Date
- 2026-05-08
AI Technical Summary
Existing exhaust pipe production equipment requires frequent adjustments and replacements of polishing components when processing exhaust pipes of different lengths, resulting in complex operating procedures and increased costs.
An inner wall polishing device for exhaust pipe production was designed. Through a telescopic shaft assembly and an adjustable base structure, it can polish exhaust pipes of different lengths and inner diameters, reducing equipment adjustment and replacement processes.
It achieves flexible adaptability to polishing the inner wall of exhaust pipes of different lengths and inner diameters, reduces the operation process of equipment adjustment and replacement, and saves costs and space.
Smart Images
Figure CN224209596U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of polishing equipment technology, specifically to an inner wall polishing device for exhaust pipe production. Background Technology
[0002] In the automotive manufacturing industry, the exhaust pipe, as a key component of the exhaust system, has its inner wall quality crucial to exhaust emission performance, noise reduction, and service life. In the exhaust pipe manufacturing process, inner wall polishing is an indispensable step. Polishing effectively reduces the surface roughness of the exhaust pipe's inner wall, decreases exhaust resistance, improves exhaust gas flow efficiency, prevents carbon buildup, and extends the pipe's lifespan. Commonly used polishing processes include mechanical polishing, chemical polishing, and electrolytic polishing. These technologies can precisely control the inner wall smoothness, ensuring that the exhaust pipe meets stringent environmental and performance standards, thus guaranteeing the stable operation of the vehicle.
[0003] Currently, in the mechanical polishing of exhaust pipe inner walls, most polishing equipment has a fixed installation position for the polishing components, which presents an adaptation problem when processing exhaust pipe raw materials of different lengths. When the length of the exhaust pipe changes, the operator needs to reinstall or adjust the position of the equipment, which increases the operation steps and time costs. In view of this, we propose an inner wall polishing device for exhaust pipe production. Utility Model Content
[0004] The purpose of this invention is to provide an inner wall polishing device for exhaust pipe production, so as to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A polishing device for the inner wall of a tailpipe is provided, including a worktable. A chuck is provided on one side of the top of the worktable, and a polishing mechanism that can move toward or away from the chuck is provided on the other side of the top of the worktable. The polishing mechanism includes a movable seat, a base mounted on the movable seat, a motor mounted on one end face of the base, a telescopic shaft assembly coaxially connected to the motor and capable of axial movement, and a sanding cloth flap wheel mounted at the end of the telescopic shaft assembly. The movable seat is slidably connected to the top of the worktable.
[0007] A hollow fixed bushing is fixed on the other end face of the base. The output shaft of the motor passes through the base and is coaxially fixedly connected to a prism shaft, which extends into the fixed bushing.
[0008] The telescopic shaft assembly includes a movable bushing and a movable shaft fitted inside the movable bushing. The movable bushing is fitted outside the fixed bushing and slides along the fixed bushing. One end of the movable shaft is restricted to the end of the movable bushing and is rotatably connected to the movable bushing. One end of the movable shaft has a sleeve hole adapted to the shape of the prism shaft, and the prism shaft extends into the sleeve hole. The other end of the movable shaft has a threaded post, and a locking plate is threadedly connected to the threaded post. The locking plate locks the sandpaper flap wheel onto the threaded post.
[0009] Preferably, the top surface of the workbench is provided with a strip-shaped through groove, and a threaded rod-shaped adjusting rod is rotatably connected in the through groove. A dial is installed at the head end of the adjusting rod, and a boss extending into the through groove is provided at the bottom end of the movable seat. The boss is slidably connected to the through groove, and the adjusting rod passes through the boss and is threadedly connected to the boss.
[0010] In this setup, rotating the dial drives the adjusting rod to rotate, and the threaded transmission between the adjusting rod and the boss allows the movable seat to move laterally along the worktable, facilitating the adjustment of the relative position between the polishing mechanism and the exhaust pipe workpiece.
[0011] Preferably, a T-shaped hanging groove is provided at the top edge of the side end face of the movable seat, and one end of a lead screw is provided in the hanging groove. The lead screw is vertically arranged and a handwheel is installed at its top end. The lead screw passes through the base and is threadedly connected to the base.
[0012] In this setup, turning the handwheel drives the lead screw to rotate. Through the threaded engagement between the lead screw and the base, the base moves vertically, thereby enabling the polishing components to adapt to exhaust pipes of different inner diameters.
[0013] Preferably, a plurality of guide posts are fixed at the top of the movable seat, and the guide posts are inserted into the base and slidably connected to the base.
[0014] In this setup, the guide column provides guidance for the lifting and lowering of the base, ensuring that the base remains stable during movement and preventing shaking that could affect the polishing accuracy.
[0015] Preferably, a limiting groove is formed on the outer surface of the fixed bushing along its axial direction, and a sliding cavity is formed at the end of the movable bushing. The fixed bushing extends into the sliding cavity, and a locking bolt is threaded on the outer surface of the movable bushing. The end of the locking bolt extends into the limiting groove, and the end of the locking bolt abuts against the bottom of the limiting groove by tightening the locking bolt.
[0016] In this setting, the axial position of the movable bushing on the fixed bushing can be controlled by adjusting the locking bolt, thereby realizing the length adjustment of the telescopic shaft assembly to adapt to the polishing of the inner wall of the exhaust pipe of different lengths.
[0017] Preferably, an annular groove is formed on the outer peripheral surface of the end of the movable shaft, and a pin is inserted into the end of the movable shaft sleeve, with the pin extending into the annular groove.
[0018] In this configuration, the pin engages with the annular groove to restrict the axial movement of the movable shaft while allowing it to rotate relative to the movable bushing, thus ensuring stable power transmission.
[0019] Preferably, the prism is hexagonal in shape, and the cross-section of the sleeve hole is a regular hexagon.
[0020] In this configuration, the hexagonal fit structure between the prism shaft and the sleeve hole ensures that the power of the motor is stably transmitted to the movable shaft, without restricting the axial movement of the movable shaft.
[0021] Preferably, the maximum outer diameter of the movable bushing is smaller than the outer diameter of the abrasive flap wheel;
[0022] In this configuration, the dimensions are designed to ensure that the abrasive blades can fully contact the inner wall of the exhaust pipe, preventing the movable bushing from interfering with the polishing operation and guaranteeing the polishing effect.
[0023] Compared with the prior art, the beneficial effects of this utility model are:
[0024] 1. The inner wall polishing device for exhaust pipe production is equipped with a telescopic shaft assembly that can extend and retract on a fixed bushing. By adjusting the extension and retraction length, it can polish the inner wall of exhaust pipe raw materials of different lengths, reducing the operation process of equipment adjustment and replacement.
[0025] 2. The inner wall polishing device for exhaust pipe production can drive the screw to rotate by turning the handwheel, which allows the base to move up and down along the telescopic shaft assembly. By adjusting the base to different height positions, it can be adapted to exhaust pipes with different inner diameters, effectively avoiding the problem of equipping separate special equipment for exhaust pipes with different inner diameter specifications, reducing costs and saving space. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0027] Figure 2 This is a schematic diagram of the polishing mechanism in this utility model;
[0028] Figure 3 This is a schematic diagram of the structure of the movable seat in this utility model;
[0029] Figure 4 This is a schematic diagram of the base structure in this utility model;
[0030] Figure 5 This is a schematic diagram of the electric motor in this utility model;
[0031] Figure 6 This is an exploded view of the telescopic shaft assembly in this utility model;
[0032] Figure 7 This is a cross-sectional view of the telescopic shaft assembly during installation in this utility model;
[0033] The meanings of the labels in the diagram are as follows:
[0034] 100. Worktable; 110. Through slot; 120. Adjusting rod; 121. Dial wheel; 130. Chuck;
[0035] 200 Polishing mechanism; 210 Movable seat; 211 Boss; 212 Hanging groove; 213 Lead screw; 2131 Handwheel; 214 Guide column; 220 Base; 221 Fixed bushing; 222 Limiting groove; 230 Motor; 231 Prism shaft; 240 Telescopic shaft assembly; 241 Movable bushing; 2411 Locking bolt; 2412 Pin; 242 Movable shaft; 2421 Sleeve hole; 2422 Threaded column; 2423 Locking plate; 2424 Annular groove; 250 Sanding cloth flap wheel. Detailed Implementation
[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0037] Example 1
[0038] Please see Figures 1-7 A polishing device for the inner wall of an exhaust pipe is disclosed, comprising a worktable 100. A chuck 130 for clamping workpieces is provided on the right side of the top of the worktable 100. By setting the chuck 130, the exhaust pipe workpiece can be firmly clamped, ensuring the stability of the workpiece position during the polishing process. A polishing mechanism 200 that can move laterally along the worktable 100 is provided on the left side of the top of the worktable 100. The polishing mechanism 200 can move laterally, moving closer to or away from the chuck 130, and can perform polishing operations on different positions inside the exhaust pipe.
[0039] The polishing mechanism 200 includes a movable seat 210, a base 220 mounted on the worktable 100, a motor 230 mounted on the left end face of the base 220, a telescopic shaft assembly 240 coaxially connected to the motor 230 and capable of axial movement, and an abrasive flap wheel 250 mounted at the end of the telescopic shaft assembly 240. The movable seat 210 is slidably connected to the top of the worktable 100. The telescopic shaft assembly 240 includes a movable bushing 241 and a movable shaft 242 sleeved within the movable bushing 241. The telescopic shaft assembly 240, in conjunction with the abrasive flap wheel 250, provides power and actuation components for polishing the inner wall of the exhaust pipe.
[0040] like Figures 1-3 As shown, in this invention, the top surface of the worktable 100 has a strip-shaped through groove 110. A threaded rod-shaped adjusting rod 120 is rotatably connected to the through groove 110. A dial wheel 121 is installed at the first end of the adjusting rod 120. The bottom end of the movable seat 210 has a boss 211 extending into the through groove 110. The boss 211 is slidably connected to the through groove 110. The adjusting rod 120 passes through the boss 211 and is threadedly connected to the boss 211. By rotating the dial wheel 121, the adjusting rod 120 is driven to rotate. With the threaded engagement between the adjusting rod 120 and the boss 211, the movable seat 210 can move laterally along the worktable 100, facilitating the adjustment of the relative position between the polishing mechanism 200 and the exhaust pipe workpiece.
[0041] like Figure 1 , Figure 2 Figure 4 and Figure 5 As shown, specifically, a hollow fixed bushing 221 is fixed on the right end face of the base 220. The output shaft of the motor 230 passes through the base 220 and is coaxially fixedly connected to a prism shaft 231, which extends into the fixed bushing 221. The fixed bushing 221 provides mounting support and positioning for the prism shaft 231, enabling the power output by the motor 230 to be stably transmitted to subsequent components.
[0042] like Figure 4 , Figure 6 and Figure 7As shown, the movable bushing 241 has a sliding cavity at its first end, and the fixed bushing 221 extends into the sliding cavity. A limiting groove 222 is formed on the outer surface of the fixed bushing 221 along its axial direction. A locking bolt 2411 is threaded onto the outer surface of the first end of the movable bushing 241. The end of the locking bolt 2411 extends into the limiting groove 222. Under the obstruction of the locking bolt 2411, the movable bushing 241 is fitted onto the outside of the fixed bushing 221 and slides along the limiting groove of the fixed bushing 221. When the locking bolt 2411 is loosened, the axial position of the movable bushing 241 on the fixed bushing 221 can be controlled. By tightening the locking bolt 2411, the end of the locking bolt 2411 can be made to abut against the bottom of the limiting groove 222. At this time, the axial position of the movable bushing 241 on the fixed bushing 221 is fixed. The telescopic shaft assembly 240 can be telescopically adjusted to adapt to the polishing requirements of the inner wall of the exhaust pipe of different lengths.
[0043] like Figure 6 and Figure 7 As shown, an annular groove 2424 is formed on the outer surface of the end of the movable shaft 242. A pin 2412 is inserted into the end of the movable bushing 241, with the end of the pin 2412 extending into the annular groove 2424. This restricts the end of the movable shaft 242 within the end of the movable bushing 241 by the pin 2412, allowing it to rotate rotatably with the movable bushing 241. The engagement of the pin 2412 and the annular groove 2424 restricts the axial movement of the movable shaft 242 while allowing it to rotate relative to the movable bushing 241, ensuring power transmission while achieving axial limiting.
[0044] like Figures 5-7 As shown, it is worth noting that the first end of the movable shaft 242 has a sleeve hole 2421 that matches the shape of the prism shaft 231. The end of the prism shaft 231 extends into the sleeve hole 2421. The prism shaft 231 is hexagonal prism in shape, and the cross-section of the sleeve hole 2421 is a regular hexagon. The matching shape of the prism shaft 231 and the sleeve hole 2421 ensures that the power of the motor 230 is stably transmitted to the movable shaft 242, while allowing the movable shaft 242 to perform a certain axial movement.
[0045] like Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, it is worth noting that the end face of the movable shaft 242 is provided with a threaded post 2422, and a locking plate 2423 is threadedly connected to the threaded post 2422. The locking plate 2423 locks the abrasive cloth flap wheel 250 onto the threaded post 2422. Through the cooperation of the threaded post 2422 and the locking plate 2423, the abrasive cloth flap wheel 250 can be easily installed and removed, facilitating the replacement of worn polishing parts.
[0046] In addition, the maximum outer diameter of the movable bushing 241 is smaller than the outer diameter of the abrasive blade 250, so that the abrasive blade 250 can fully contact the inner wall of the exhaust pipe during the polishing process, avoiding interference of the movable bushing 241 with the polishing operation.
[0047] In this embodiment, the inner wall polishing device for exhaust pipe production is used as follows: First, the exhaust pipe workpiece is placed on the chuck 130, and the workpiece is firmly fixed by the clamping action of the chuck 130 to ensure stability during the polishing process. Then, according to the length of the exhaust pipe, the locking bolt 2411 is adjusted to control the axial position of the movable bushing 241 on the fixed bushing 221, completing the telescopic adjustment of the telescopic shaft assembly 240, so that the abrasive cloth flap wheel 250 can extend into the appropriate polishing position. Next, the motor 230 is started, and the power of the motor 230 is transmitted through... The prism shaft 231 transmits power to the movable shaft 242, which in turn drives the abrasive cloth flap wheel 250 to start rotating, providing power for the polishing work. Finally, the dial wheel 121 is rotated to drive the adjusting rod 120 to rotate, so that the movable seat 210 moves laterally along the worktable 100 repeatedly. At the same time, the chuck 130 is manually moved to drive the exhaust pipe to rotate, so that the polishing mechanism 200 can polish different parts of the inner wall of the exhaust pipe until the polishing work of the entire inner wall is completed. If the abrasive cloth flap wheel 250 is worn, it can be easily replaced by the threaded post 2422 and the locking plate 2423.
[0048] Example 2
[0049] To facilitate the processing of exhaust pipes of different diameters, such as Figure 3 As shown, a T-shaped hanging groove 212 is provided at the top edge of the side end face of the movable seat 210. One end of the lead screw 213 is provided in the hanging groove 212. The end of the lead screw 213 is provided with a T-shaped hanging rod. The lead screw 213 is rotatably mounted in the hanging groove 212 through the hanging rod. The lead screw 213 is vertically arranged and a handwheel 2131 is installed at its top. The lead screw 213 passes through the base 220 and is threadedly connected to the base 220. Several guide posts 214 are fixed at the top of the movable seat 210. The guide posts 214 are inserted into the base 220 and are slidably connected to the base 220.
[0050] Specifically, by rotating the handwheel 2131, the lead screw 213 is rotated, causing the lead screw 213 to be threaded through the base 220. This allows the base 220 to move up and down along the direction of the guide column 214, which in turn drives the telescopic shaft assembly 240 and the abrasive cloth flap wheel 250 fixed on the base 220 to rise and fall synchronously. This allows the abrasive cloth flap wheel 250 to accurately adapt to exhaust pipes of different inner diameters, ensuring that during polishing operations, the abrasive cloth flap wheel 250 maintains appropriate contact pressure and polishing position with the inner wall of the exhaust pipe. This allows for the completion of inner wall polishing work for various specifications of exhaust pipes without changing equipment.
[0051] It is worth noting that the electric motor 230 involved in this utility model is a conventional technology and will not be described in detail here.
[0052] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. An inner wall polishing device for exhaust pipe production, comprising a worktable (100), characterized in that: A chuck (130) is provided on one side of the top of the workbench (100), and a polishing mechanism (200) is provided on the other side of the top of the workbench (100) that can move toward or away from the chuck (130). The polishing mechanism (200) includes a movable seat (210), a base (220) provided on the movable seat (210), a motor (230) installed on one end face of the base (220), a telescopic shaft assembly (240) coaxially connected to the motor (230) and capable of axial movement, and a sanding cloth flap wheel (250) installed at the end of the telescopic shaft assembly (240). The movable seat (210) is slidably connected to the top of the workbench (100). A hollow fixed bushing (221) is fixed on the other end face of the base (220). The output shaft of the motor (230) passes through the base (220) and is coaxially fixedly connected to a prism shaft (231). The prism shaft (231) extends into the fixed bushing (221). The telescopic shaft assembly (240) includes a movable bushing (241) and a movable shaft (242) fitted inside the movable bushing (241). The movable bushing (241) is fitted outside the fixed bushing (221) and slides along the fixed bushing (221). One end of the movable shaft (242) is restricted to the end of the movable bushing (241) and is rotatably connected to the movable bushing (241). One end of the movable shaft (242) is provided with a sleeve hole (2421) that matches the shape of the prism shaft (231). The prism shaft (231) extends into the sleeve hole (2421). The other end of the movable shaft (242) is provided with a threaded post (2422). A locking plate (2423) is threaded onto the threaded post (2422). The locking plate (2423) locks the sandpaper flap wheel (250) onto the threaded post (2422).
2. The inner wall polishing device for tailpipe production according to claim 1, characterized in that: The top surface of the workbench (100) is provided with a strip-shaped through groove (110). A threaded rod-shaped adjusting rod (120) is rotatably connected in the through groove (110). A dial wheel (121) is installed at the head end of the adjusting rod (120). The bottom end of the movable seat (210) is provided with a boss (211) that extends into the through groove (110). The boss (211) is slidably connected to the through groove (110). The adjusting rod (120) passes through the boss (211) and is threadedly connected to the boss (211).
3. The inner wall polishing device for tailpipe production according to claim 1, characterized in that: The top edge of the side end face of the movable seat (210) is provided with a hanging groove (212) with a cross-section in the shape of T. One end of the screw (213) is provided in the hanging groove (212). The screw (213) is set vertically and a handwheel (2131) is installed at the top. The screw (213) passes through the base (220) and is threadedly connected to the base (220).
4. The inner wall polishing device for tailpipe production according to claim 1, characterized in that: The top of the movable seat (210) is fixed with several guide posts (214), which are inserted into the base (220) and slidably connected to the base (220).
5. The inner wall polishing device for tailpipe production according to claim 1, characterized in that: A limiting groove (222) is formed on the outer surface of the fixed bushing (221) along its axial direction. A sliding cavity is formed at the end of the movable bushing (241). The fixed bushing (221) extends into the sliding cavity. A locking bolt (2411) is threaded on the outer surface of the movable bushing (241). The end of the locking bolt (2411) extends into the limiting groove (222). By tightening the locking bolt (2411), the end of the locking bolt (2411) abuts against the bottom of the limiting groove (222).
6. The inner wall polishing device for tailpipe production according to claim 1, characterized in that: An annular groove (2424) is provided on the outer surface of the end of the movable shaft (242), and a pin (2412) is inserted into the end of the movable bushing (241), the pin (2412) extending into the annular groove (2424).
7. The inner wall polishing device for tailpipe production according to claim 1, characterized in that: The prism (231) is hexagonal prism in shape, and the cross-section of the sleeve hole (2421) is a regular hexagon.
8. The inner wall polishing device for tailpipe production according to claim 1, characterized in that: The maximum outer diameter of the movable bushing (241) is smaller than the outer diameter of the abrasive flap wheel (250).