Polishing auxiliary positioning device for piston rod of automobile shock absorber

Abstract

The invention belongs to the technical field of automobile part machining, and particularly relates to an automobile shock absorber piston rod polishing auxiliary positioning device which comprises a workbench, and a transmission tool is arranged on the rear top wall of the workbench. The circle centers of the two clamping circular plates and the center axis of the piston rod are located on the same axis, the two ends of the piston rod are prevented from shaking, after the piston rod is polished, inclined upward thrust is provided during discharging of the piston rod through airflow, the viscosity between grinding oil on the surface of the piston rod and a material guide groove is matched, the downward rolling speed of the piston rod is reduced, and the piston rod is prevented from falling off. And the piston rods are finally buffered through the cushioning layers on the overturning plates, so that the impact force of the piston rods rolling out of the bottom of the guide groove is reduced to the minimum, surface damage caused by collision between the piston rods is avoided, the product quality of the piston rods is guaranteed, and the polishing quality of the piston rods is jointly improved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts processing, in particular to a polishing auxiliary positioning device for a piston rod of an automobile shock absorber. Background Art

[0002] Polishing of automobile shock absorber piston rod is an important process, which aims to improve the surface finish and wear resistance of the piston rod and ensure the performance and service life of the shock absorber. Before polishing the piston rod, it needs to be thoroughly cleaned to remove dirt, grease and rust on the surface, and the piston rod should be fully inspected to ensure that there are no cracks, pits or other serious surface defects; When the traditional piston rod polishing device is working, it is inconvenient to fix the two ends of the piston rod, so that the two ends of the outer wall of the piston rod will shake during the polishing process, affecting the efficiency of polishing the outer wall of the piston rod; at the same time, after the piston rod is polished, the piston rod is directly guided into the storage box through the guide groove. Due to the influence of inertia, the piston rods will collide with each other, making their surfaces easily damaged, affecting the product quality of the piston rod.

[0003] In view of the above technical defects, a solution is now proposed. Summary of the invention

[0004] The purpose of the present invention is to provide a polishing auxiliary positioning device for a piston rod of an automobile shock absorber to solve the technical defects proposed by the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an auxiliary positioning device for polishing a piston rod of an automobile shock absorber, comprising a workbench, a transmission tooling is arranged on the rear top wall of the workbench, a support frame is arranged above the transmission tooling, a regulating mechanism is arranged below the support frame, a first polishing wheel and a second polishing wheel are arranged in the middle of the workbench, an opening is opened on one side of the top of the workbench, and a material discharge mechanism is arranged below the opening; The regulating mechanism includes a top support plate fixedly connected to the bottom of the support frame, a fixed arm is fixedly arranged on one side of the bottom of the top support plate, a cylinder is arranged in the middle of the bottom of the top support plate, an arc-shaped limit rod is fixedly arranged on the other side of the bottom of the top support plate, an L-shaped arm is slidably arranged on the outer side of the arc-shaped limit rod, the top of the L-shaped arm is rotatably connected to the bottom of the top support plate through a pin, the bottoms of the L-shaped arm and the fixed arm are rotatably connected to a clamping circular plate through a U-shaped block, and an adjusting component is arranged at the output end of the cylinder.

[0006] Furthermore, the material unloading mechanism includes a material guide trough, the bottom of the material guide trough is connected to a storage box, the front wall of the material guide trough is installed with a fixed plate, the bottom front wall of the fixed plate is fixedly connected to a horizontal plate, the front wall of the horizontal plate is rotatably provided with a flip plate, an air pump is provided on one side of the storage box, the output end of the air pump is connected to a first air inlet pipe, the side wall of the first air inlet pipe is connected to a second air inlet pipe, and the output ends of the first air inlet pipe and the second air inlet pipe both extend into the material guide trough.

[0007] Furthermore, the two clamping circular plates are arranged opposite to each other, and a thrust spring is sleeved on the outer wall of the arc-shaped limiting rod located above the L-shaped arm.

[0008] Furthermore, the adjustment assembly includes a storage tube connected to the bottom of the top support plate, the output end of the cylinder movably penetrates to the outside of the storage tube and is rotatably provided with a roller, the roller cooperates with the L-shaped arm transmission, the cylinder is located on the outer wall of the storage tube and is fixedly connected with a piston, the top of the top support plate is fixedly inserted with an oil inlet pipe, and the bottom of the oil inlet pipe is connected to the top of the storage tube, the bottom output end of the storage tube is connected to a hose, and the output end of the hose is connected to the L-shaped tube.

[0009] Furthermore, the outer wall of the L-shaped tube is connected to the first polishing wheel housing through a vertical rod, and the output end of the L-shaped tube faces the first polishing wheel.

[0010] Furthermore, the rear wall of the material guide trough is connected to the opening, a tension spring is connected between the flip plate and the transverse plate, and one side of the flip plate is in contact with the output end of the material guide trough.

[0011] Furthermore, an upper support plate is installed on the other side of the top of the workbench, and a plurality of pairs of support wheels for supporting the piston rod are arranged above the upper support plate.

[0012] The polishing auxiliary positioning method of the automobile shock absorber piston rod comprises the following steps: Step 1: First, place the piston rod on several groups of support wheels through external loading equipment, and determine the position of the piston rod through several groups of support wheels; drive the support frame to move to the clamping position through the transmission tooling. At this time, the clamping circular plate at the bottom end of the fixed arm contacts one end of the piston rod, and the extended end of the cylinder is controlled to shrink from the longest to half the length. The piston still blocks the output end of the oil inlet pipe. At the same time, through the thrust of the thrust spring, the L-shaped arm drives the clamping circular plate at its bottom to contact the other end of the piston rod, and the piston rod is clamped by the two clamping circular plates. At this time, the center of the two clamping circular plates is on the same axis as the central axis of the piston rod, and then the transmission tooling is controlled to drive the support frame to move toward the material guide groove. During this process, the first polishing wheel and the second polishing wheel are turned on, and the outer wall of the piston rod is polished and polished by the first polishing wheel and the second polishing wheel to prevent the two ends of the piston rod from shaking; Step 2: Before one end of the piston rod moves to contact the first polishing wheel and the second polishing wheel, the extended end of the control cylinder is contracted from half the length to the shortest, so that the piston is separated from the output end of the oil inlet pipe, so that the grinding oil in the oil inlet pipe is sprayed out through the storage pipe, the hose and the L-shaped pipe, and the grinding oil is sprayed on the surface of the first polishing wheel to reduce friction and wear, and to dissipate heat from the piston rod, the first polishing wheel and the second polishing wheel; Step three: When the transmission tooling drives the support frame to move to the unloading station, at this time, the polished piston rod moves to the top of the material guide groove, and while the air pump is turned on, the extended end of the cylinder is controlled to extend to the longest, so that the piston rod is separated from the two clamping circular plates, rolls downward along the material guide groove, and enters the bottom of the fixed plate, and the air flow blown out from the air pump is injected into the material guide groove under the fixed plate through the first air inlet pipe and the second air inlet pipe. The air flow provides an oblique upward thrust to the piston rod, and the viscosity between the grinding oil on the surface of the piston rod and the material guide groove is combined to reduce the downward rolling speed of the piston rod. When the piston rod rolls to the bottom of the material guide groove, the shock-absorbing layer on the flip plate performs the final buffering on the piston rod, so that the impact force of the piston rod rolling out from the bottom of the material guide groove is minimized.

[0013] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, the support frame is driven to move to the clamping station by the transmission tooling, and the clamping circular plate at the bottom end of the fixed arm contacts one end of the piston rod, controlling the extended end of the cylinder to shrink from the longest to half the length, and the piston still blocks the output end of the oil inlet pipe. At the same time, through the thrust of the thrust spring, the L-shaped arm drives the clamping circular plate at its bottom end to contact the other end of the piston rod, and the piston rod is clamped by the two clamping circular plates. The center of the two clamping circular plates is on the same axis as the central axis of the piston rod. During the polishing process, shaking of the two ends of the piston rod is avoided, thereby ensuring the efficiency of polishing the outer wall of the piston rod. In the present invention, the air flow blown out from the air pump is injected into the material guide groove below the fixed plate through the first air inlet pipe and the second air inlet pipe, and the air flow provides an inclined upward thrust to the piston rod when unloading the material, and cooperates with the viscosity between the grinding oil on the surface of the piston rod and the material guide groove, so that the downward rolling speed of the piston rod is reduced. When the piston rod rolls to the bottom of the material guide groove, the shock-absorbing layer on the flip plate performs the final buffering on the piston rod, so that the impact force of the piston rod rolling out from the bottom of the material guide groove is minimized, thereby avoiding surface damage caused by collisions between piston rods, and ensuring the product quality of the piston rod, and the grinding oil layer on the surface of the piston rod will also provide buffering for collisions between piston rods. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings; Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a front view of the overall structure of the present invention; Figure 3 It is a front view of the regulating mechanism in the present invention; Figure 4 A three-dimensional diagram of a clamping circular plate in the present invention; Figure 5 It is a front view of the adjustment component in the present invention; Figure 6 It is a front view of the feeding mechanism in the present invention; Figure 7 It is a front view of the internal structure of the material guide chute in the present invention; Figure 8 is a schematic diagram of the connection relationship between the first air intake pipe and the second air intake pipe; Fig. 9 It is a front view on the upper support plate in the present invention.

[0015] 1. Adjustment mechanism; 2. Upper support plate; 3. Workbench; 4. Unloading mechanism; 5. Opening; 6. Transmission tooling; 7. First polishing wheel; 8. Support frame; 9. Support wheel; 10. Second polishing wheel; 11. Arc limit rod; 12. L-shaped arm; 13. Clamping circular plate; 14. Adjustment assembly; 15. Cylinder; 16. Fixed arm; 17. Top support plate; 41. Fixed plate; 42. First air inlet pipe; 43. Air pump; 44. Flip plate; 45. Storage box; 46. Second air inlet pipe; 47. Material guide trough; 141. Oil inlet pipe; 142. Roller; 143. Hose; 144. L-shaped pipe; 145. Piston; 146. Storage pipe. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] Embodiment 1: Figure 1-9 As shown, the present embodiment proposes an auxiliary positioning device for polishing a piston rod of an automobile shock absorber, comprising a workbench 3, a transmission tool 6 is arranged on the rear top wall of the workbench 3, a support frame 8 is arranged above the transmission tool 6, a regulating mechanism 1 is arranged below the support frame 8, a first polishing wheel 7 and a second polishing wheel 10 are arranged in the middle of the workbench 3, an opening 5 is opened on one side of the top of the workbench 3, and a material discharge mechanism 4 is arranged below the opening 5; It should be noted that the transmission tooling 6 is composed of a motor, a threaded rod and a slide rail. The output end of the motor is fixedly connected to the threaded rod, the end of the threaded rod is connected to the top of the workbench 3, the outer wall of the threaded rod is threadedly connected to the support frame 8, and the bottom of the support frame 8 is slidably matched with the slide rail to achieve adjustment of the position of the support frame 8.

[0018] The first polishing wheel 7 and the second polishing wheel 10 are turned on, and the outer wall of the piston rod is polished and ground by the first polishing wheel 7 and the second polishing wheel 10.

[0019] The regulating mechanism 1 includes a top support plate 17 fixedly connected to the bottom of the support frame 8, a fixed arm 16 is fixedly arranged on one side of the bottom of the top support plate 17, a cylinder 15 is arranged in the middle of the bottom of the top support plate 17, an arc-shaped limit rod 11 is fixedly arranged on the other side of the bottom of the top support plate 17, an L-shaped arm 12 is slidably arranged on the outer side of the arc-shaped limit rod 11, the top of the L-shaped arm 12 is rotatably connected to the bottom of the top support plate 17 through a latch, the bottoms of the L-shaped arm 12 and the fixed arm 16 are rotatably connected to a clamping circular plate 13 through a U-shaped block, and an adjusting component 14 is arranged at the output end of the cylinder 15.

[0020] It should be supplemented here that a semicircular plate is fixedly provided on the side wall opposite to the clamping circular plate 13, which serves to limit the end of the piston rod and improve the stability during transportation and polishing.

[0021] The two clamping circular plates 13 are arranged opposite to each other, and a thrust spring is sleeved on the outer wall of the arc-shaped limiting rod 11 located above the L-shaped arm 12.

[0022] The clamping circular plate 13 at the bottom end of the fixed arm 16 contacts one end of the piston rod, and the extended end of the control cylinder 15 is contracted from the longest to half the length. The piston 145 still blocks the output end of the oil inlet pipe 141. At the same time, through the thrust of the thrust spring, the L-shaped arm 12 drives the clamping circular plate 13 at its bottom end to contact the other end of the piston rod, and the piston rod is clamped by the two clamping circular plates 13. At this time, the center of the two clamping circular plates 13 is on the same axis as the central axis of the piston rod. During the polishing process, the two ends of the piston rod are prevented from shaking, thereby ensuring the efficiency of polishing the outer wall of the piston rod.

[0023] The adjusting assembly 14 includes a storage tube 146 connected to the bottom of the top support plate 17. The output end of the cylinder 15 movably penetrates to the outside of the storage tube 146 and is rotatably provided with a roller 142. The roller 142 cooperates with the L-shaped arm 12 in transmission. The cylinder 15 is located on the outer wall of the storage tube 146 and is fixedly connected with a piston 145. An oil inlet pipe 141 is fixedly inserted at the top of the top support plate 17, and the bottom of the oil inlet pipe 141 is connected to the top of the storage tube 146. The bottom output end of the storage tube 146 is connected to a hose 143, and the output end of the hose 143 is connected to an L-shaped tube 144.

[0024] The outer wall of the L-shaped tube 144 is connected to the housing of the first polishing wheel 7 through a vertical rod, and the output end of the L-shaped tube 144 faces the first polishing wheel 7 .

[0025] Before one end of the piston rod moves to contact the first polishing wheel 7 and the second polishing wheel 10, the extended end of the control cylinder 15 is contracted from half its length to the shortest, so that the piston 145 is separated from the output end of the oil inlet pipe 141, and the grinding oil in the oil inlet pipe 141 is sprayed out through the storage pipe 146, the hose 143 and the L-shaped pipe 144, and the grinding oil is sprayed on the surface of the first polishing wheel 7. Not only will the grinding oil be coated on the outer wall of the piston rod to reduce friction and wear and improve grinding accuracy and surface quality, but the piston rod, the first polishing wheel 7 and the second polishing wheel 10 will also dissipate heat.

[0026] Example 2: Figure 1-9 As shown, the present embodiment proposes an auxiliary positioning device for polishing a piston rod of an automobile shock absorber, which is improved on the basis of the embodiment 1, wherein the unloading mechanism 4 comprises a material guide groove 47, the rear wall of the material guide groove 47 is connected to the opening 5, the bottom of the material guide groove 47 is connected to a storage box 45, the front wall of the material guide groove 47 is installed with a fixed plate 41, the bottom front wall of the fixed plate 41 is fixedly connected with a transverse plate, and the front wall of the transverse plate is rotatably provided with a flip plate 44; It should be noted here that a shock absorbing layer is provided on the flip plate 44; When the piston rod rolls to the bottom of the guide groove 47, the shock absorbing layer on the flip plate 44 performs the final buffering on the piston rod, so that the impact force of the piston rod rolling out from the bottom of the guide groove 47 is minimized; An air pump 43 is provided on one side of the storage box 45, and the output end of the air pump 43 is connected to the first air inlet pipe 42, and the side wall of the first air inlet pipe 42 is connected to the second air inlet pipe 46, and the output ends of the first air inlet pipe 42 and the second air inlet pipe 46 both extend into the material guide groove 47, and a tension spring is connected between the flip plate 44 and the horizontal plate, and one side of the flip plate 44 is in contact with the output end of the material guide groove 47; The output end of the first air inlet pipe 42 extends through the storage box 45 into the material guide groove 47 , and the output end of the second air inlet pipe 46 extends through the rear wall of the material guide groove 47 into the material guide groove 47 . The output ends of the first air inlet pipe 42 and the second air inlet pipe 46 are arranged opposite to each other.

[0027] The polished piston rod moves to the top of the material guide groove 47, and while the air pump 43 is turned on, the extended end of the cylinder 15 is controlled to extend to the longest, so that the piston rod is separated from the two clamping circular plates 13, rolls downward along the material guide groove 47, and enters the bottom of the fixed plate 41. The airflow blown out from the air pump 43 is injected into the material guide groove 47 under the fixed plate 41 through the first air inlet pipe 42 and the second air inlet pipe 46. The airflow provides an oblique upward thrust to the piston rod, and the viscosity between the grinding oil on the surface of the piston rod and the material guide groove 47 reduces the speed of the piston rod rolling downward. With the buffering of the flip plate 44, the surface damage caused by the collision between the piston rods is avoided, thereby ensuring the product quality of the piston rod. The grinding oil layer on the surface of the piston rod will also provide a buffer for the collision between the piston rods.

[0028] An upper support plate 2 is installed on the other side of the top of the workbench 3, and a plurality of pairs of support wheels 9 for supporting the piston rod are arranged above the upper support plate 2; the piston rod is placed on a plurality of groups of support wheels 9, and the position of the piston rod is determined by the plurality of groups of support wheels 9.

[0029] It can be known from the combination of Example 1 and Example 2 in the present invention that: before polishing the piston rod, the piston rod is clamped by two clamping circular plates 13, and the center of the two clamping circular plates 13 is on the same axis as the central axis of the piston rod, so as to avoid shaking of the two ends of the piston rod, thereby ensuring the efficiency of polishing the outer wall of the piston rod. After polishing the piston rod, the airflow provides an inclined upward thrust to the piston rod when unloading, and the viscosity between the grinding oil on the surface of the piston rod and the guide groove 47 is combined to reduce the speed of the piston rod rolling downward. When the piston rod rolls to the bottom of the guide groove 47, the shock-absorbing layer on the flip plate 44 is used to provide the final buffering to the piston rod, so that the impact force of the piston rod rolling out from the bottom of the guide groove 47 is minimized, thereby avoiding surface damage caused by collision between piston rods, and ensuring the product quality of the piston rod. The grinding oil layer on the surface of the piston rod will also provide buffering for collision between piston rods.

[0030] The working process and principle of the present invention are as follows: First, the piston rod is placed on several groups of support wheels 9 through external loading equipment, and the position of the piston rod is determined by several groups of support wheels 9; the support frame 8 is driven to move to the clamping position through the transmission tooling 6. At this time, the clamping circular plate 13 at the bottom of the fixed arm 16 contacts one end of the piston rod, and the extended end of the control cylinder 15 is contracted from the longest to half the length. The piston 145 still blocks the output end of the oil inlet pipe 141. At the same time, through the thrust of the thrust spring, the L-shaped arm 12 drives the clamping circular plate 13 at its bottom to contact the piston The other end of the rod is in contact, and the piston rod is clamped by two clamping circular plates 13. At this time, the center of the two clamping circular plates 13 is on the same axis as the central axis of the piston rod, and then the transmission tooling 6 is controlled to drive the support frame 8 to move toward the material guide groove 47. During this process, the first polishing wheel 7 and the second polishing wheel 10 are turned on, and the outer wall of the piston rod is polished and grinded by the first polishing wheel 7 and the second polishing wheel 10. During the polishing process, the two ends of the piston rod are prevented from shaking, thereby ensuring the efficiency of polishing the outer wall of the piston rod; Before one end of the piston rod moves to contact the first polishing wheel 7 and the second polishing wheel 10, the extended end of the control cylinder 15 is contracted from half the length to the shortest, so that the piston 145 is separated from the output end of the oil inlet pipe 141, so that the grinding oil in the oil inlet pipe 141 is sprayed out through the storage pipe 146, the hose 143 and the L-shaped pipe 144, and the grinding oil is sprayed on the surface of the first polishing wheel 7, which not only applies the grinding oil to the outer wall of the piston rod to reduce friction and wear, improve grinding accuracy and surface quality, but also dissipates heat from the piston rod, the first polishing wheel 7 and the second polishing wheel 10; When the transmission tooling 6 drives the support frame 8 to move to the unloading station, at this time, the polished piston rod moves to the top of the guide groove 47, and while the air pump 43 is turned on, the extended end of the cylinder 15 is controlled to extend to the longest, so that the piston rod is separated from the two clamping circular plates 13, rolls downward along the guide groove 47, and enters the bottom of the fixed plate 41, and the air flow blown out from the air pump 43 is injected into the guide groove 47 under the fixed plate 41 through the first air inlet pipe 42 and the second air inlet pipe 46, and the air flow provides an oblique upward thrust to the piston rod through the air flow, and the viscosity between the grinding oil on the surface of the piston rod and the guide groove 47 is combined to reduce the speed of the piston rod rolling downward. When the piston rod rolls to the bottom of the guide groove 47, the shock-absorbing layer on the flip plate 44 performs the final buffering on the piston rod, so that the impact force of the piston rod rolling out from the bottom of the guide groove 47 is minimized, thereby avoiding surface damage caused by collision between piston rods, ensuring the product quality of the piston rod, and the grinding oil layer on the surface of the piston rod will also provide buffering for collision between piston rods.

[0031] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A polishing auxiliary positioning device for a shock absorber piston rod of an automobile, comprising a workbench (3), a transmission tool (6) being arranged on the rear top wall of the workbench (3), and a support frame (8) being arranged above the transmission tool (6), characterized in that: A regulating mechanism (1) is arranged below the support frame (8), a first polishing wheel (7) and a second polishing wheel (10) are arranged in the middle of the workbench (3), an opening (5) is opened on one side of the top of the workbench (3), and a material discharge mechanism (4) is arranged below the opening (5); The regulating mechanism (1) comprises a top support plate (17) fixedly connected to the bottom of the support frame (8); a fixed arm (16) is fixedly arranged on one side of the bottom of the top support plate (17); a cylinder (15) is arranged in the middle of the bottom of the top support plate (17); an arc-shaped limit rod (11) is fixedly arranged on the other side of the bottom of the top support plate (17); an L-shaped arm (12) is slidably arranged on the outer side of the arc-shaped limit rod (11); the top of the L-shaped arm (12) is rotatably connected to the bottom of the top support plate (17) via a latch; the bottoms of the L-shaped arm (12) and the fixed arm (16) are both rotatably connected to a clamping circular plate (13) via a U-shaped block; and an adjusting component (14) is arranged at the output end of the cylinder (15); The unloading mechanism (4) comprises a material guide trough (47), the bottom of the material guide trough (47) is connected to a storage box (45), a front wall of the material guide trough (47) is installed with a fixed plate (41), the bottom front wall of the fixed plate (41) is fixedly connected to a transverse plate, the front wall of the transverse plate is rotatably provided with a flip plate (44), an air pump (43) is provided on one side of the storage box (45), the output end of the air pump (43) is connected to a first air intake pipe (42), the side wall of the first air intake pipe (42) is connected to a second air intake pipe (46), and the output ends of the first air intake pipe (42) and the second air intake pipe (46) both extend into the material guide trough (47); The regulating assembly (14) comprises a storage tube (146) connected to the bottom of the top support plate (17); the output end of the cylinder (15) movably penetrates to the outside of the storage tube (146) and is rotatably provided with a roller (142); the roller (142) cooperates with the L-shaped arm (12) in transmission; a piston (145) is fixedly connected to the outer wall of the cylinder (15) located inside the storage tube (146); an oil inlet pipe (141) is fixedly inserted at the top of the top support plate (17); the bottom of the oil inlet pipe (141) is communicated with the top of the storage tube (146); the bottom output end of the storage tube (146) is connected to a hose (143); the output end of the hose (143) is connected to an L-shaped tube (144); The outer wall of the L-shaped tube (144) is connected to the housing of the first polishing wheel (7) via a vertical rod, and the output end of the L-shaped tube (144) faces the first polishing wheel (7).

2. The polishing auxiliary positioning device for automobile shock absorber piston rod according to claim 1, characterized in that: The two clamping circular plates (13) are arranged opposite to each other, and a thrust spring is sleeved on the outer wall of the arc-shaped limiting rod (11) located above the L-shaped arm (12).

3. The polishing auxiliary positioning device for automobile shock absorber piston rod according to claim 1, characterized in that: The rear wall of the material guide trough (47) is connected to the opening (5), a tension spring is connected between the flip plate (44) and the transverse plate, and one side of the flip plate (44) is in contact with the output end of the material guide trough (47).

4. The polishing auxiliary positioning device for automobile shock absorber piston rod according to claim 1, characterized in that: An upper support plate (2) is installed on the other side of the top of the workbench (3), and a plurality of pairs of support wheels (9) for supporting piston rods are arranged above the upper support plate (2).

5. The polishing auxiliary positioning device for automobile shock absorber piston rod according to any one of claims 1 to 4, characterized in that: The polishing auxiliary positioning method of the automobile shock absorber piston rod comprises the following steps: Step 1: First, the piston rod is placed on a plurality of support wheels (9) by an external loading device, and the position of the piston rod is determined by the plurality of support wheels (9); the support frame (8) is driven to move to the clamping position by the transmission tooling (6), at which time the clamping circular plate (13) at the bottom end of the fixed arm (16) contacts one end of the piston rod, and the extended end of the control cylinder (15) is contracted from the longest to half the length, and the piston (145) still blocks the output end of the oil inlet pipe (141). At the same time, the thrust of the thrust spring causes the L-shaped arm (12) to be The clamping circular plate (13) at the bottom end is driven to contact the other end of the piston rod, and the piston rod is clamped by the two clamping circular plates (13). At this time, the center of the two clamping circular plates (13) and the central axis of the piston rod are on the same axis, and then the transmission tooling (6) is controlled to drive the support frame (8) to move toward the material guide groove (47). During this process, the first polishing wheel (7) and the second polishing wheel (10) are turned on, and the outer wall of the piston rod is polished and grinded by the first polishing wheel (7) and the second polishing wheel (10) to prevent the two ends of the piston rod from shaking; Step 2: before one end of the piston rod moves to contact the first polishing wheel (7) and the second polishing wheel (10), the extended end of the control cylinder (15) is contracted from half its length to the shortest, so that the piston (145) is separated from the output end of the oil inlet pipe (141), so that the grinding oil in the oil inlet pipe (141) is sprayed out through the storage pipe (146), the hose (143) and the L-shaped pipe (144), and the grinding oil is sprayed onto the surface of the first polishing wheel (7), thereby reducing friction and wear, and dissipating heat from the piston rod, the first polishing wheel (7) and the second polishing wheel (10); Step 3: When the transmission tooling (6) drives the support frame (8) to move to the unloading station, the polished piston rod moves to the top of the guide groove (47). When the air pump (43) is turned on, the extended end of the cylinder (15) is controlled to be extended to the maximum, so that the piston rod is separated from the two clamping circular plates (13), rolls downward along the guide groove (47), and enters the bottom of the fixed plate (41). The air flow blown out from the air pump (43) is injected into the guide groove (47) below the fixed plate (41) through the first air inlet pipe (42) and the second air inlet pipe (46). The air flow provides an oblique upward thrust to the piston rod. The viscosity between the grinding oil on the surface of the piston rod and the guide groove (47) reduces the speed of the piston rod rolling downward. When the piston rod rolls to the bottom of the guide groove (47), the shock absorbing layer on the flip plate (44) performs a final buffering on the piston rod, so that the impact force of the piston rod rolling out from the bottom of the guide groove (47) is minimized.

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