A piston pin edge burr removal device

Abstract

This invention provides a piston pin edge burr removal device, relating to the field of piston pin processing technology. It includes: a burr removal machine support, an outer bracket fixedly mounted above the burr removal machine support, a circulating drive component fixedly connected to the front of the outer bracket, a circulating wheel rotatably mounted on the rotating shaft of the circulating drive component via bearings and a bracket, the circulating wheel being located inside the outer bracket, and a workpiece drive component fixedly connected to the outer sides of the two bracket plates of the outer bracket. The piston pin end face burr removal device of this application also has the functions of batch storage, sequential feeding, automatic clamping, and sequential unloading. It eliminates the need for manual or robotic arm operations to individually feed, position, and unload piston pins, making it suitable for batch burr removal of piston pins. It solves the problem that manual workpiece installation requires sequential installation and removal of individual workpieces, which is cumbersome and unsuitable for large-scale piston pin edge burr removal.

Description

Technical Field

[0001] This invention relates to the field of piston pin processing technology, and in particular to a device for removing burrs from the edge of piston pins. Background Technology

[0002] Piston pin edge burrs are tiny metal protrusions formed on the edges of the material due to plastic deformation during machining processes such as turning and grinding. The presence of burrs can scratch the cylinder wall or connecting rod bushing, damage the lubricating oil film, accelerate wear, and even break off to form abrasive particles that further damage the engine. Piston pins need to have burrs precisely removed through physical friction to ensure that the pin surface is smooth and without sharp edges, thereby avoiding abnormal wear of moving parts, ensuring assembly accuracy, and improving engine reliability and lifespan.

[0003] Existing manual deburring methods require manual removal of burrs from edges using hand-held files or other grinding tools. This manual process is inefficient, has a high error rate, and improper operation can easily cause wear on the workpiece surface. Automated grinding devices, on the other hand, require either robotic arms or manual labor to precisely install the workpieces into the device. Robotic arms increase production and control costs, while manual installation requires sequential installation and removal of individual workpieces, which is cumbersome and unsuitable for large-scale piston pin edge burr removal. Summary of the Invention

[0004] This invention provides a piston pin edge burr removal device to solve the problem that automated grinding devices require precise installation of workpieces into the grinding device by robotic arms or manual labor. Robotic arms increase production and control costs, while manual installation requires sequential installation and removal of individual workpieces, which is cumbersome and unsuitable for large-scale piston pin edge burr removal.

[0005] This invention provides a piston pin edge burr removal device, specifically comprising: a burr removal machine support; an outer bracket fixedly mounted above the burr removal machine support; a circulating drive component fixedly connected to the front of the outer bracket; a circulating wheel rotatably mounted on the rotating shaft of the circulating drive component via bearings and a bracket; the circulating wheel being located inside the outer bracket; a workpiece drive component fixedly connected to the outer sides of each of the two support plates of the outer bracket; a workpiece rotation pressure shaft fixedly connected to the rotating shaft of the workpiece drive component; eight piston pin insertion holes formed on the outer surface of the circulating wheel; and a drive gear fixedly connected to the end of the rotating shaft of the circulating drive component. An idler wheel is rotatably connected inside the outer support. An internal gear ring with an annular structure is fixedly connected to the inner surface of the circulating wheel. The internal gear ring meshes with the idler wheel, which meshes with the drive gear. A pusher cylinder is provided at the front and rear of the outer support. The pusher cylinder's push rod is connected to a flow guide shroud. The flow guide shroud is connected to a flow guide top plate. The flow guide top plate has a U-shaped grinding disc assembly ring groove on its surface. An annular burr grinding disc is installed inside the grinding disc assembly ring groove. A feed channel is fixedly connected to the upper right of the outer support, and a discharge channel is fixedly connected to the lower left of the outer support. Both the feed channel and the discharge channel are inclined with the left side lower than the right side.

[0006] Furthermore, the front and rear plates of the outer support are each provided with a semi-circular notch for grinding, and the two grinding openings are staggered and coaxial with the two guide plates respectively.

[0007] Furthermore, the front and rear plates of the outer bracket are each provided with a rotating plate assembly slot, and the two rotating plate assembly slots are staggered. A rotating top plate is connected inside the rotating plate assembly slot through a bearing.

[0008] Furthermore, the inner wall of the piston pin inlet is provided with two top wheel receiving grooves, the bottom of the piston pin inlet is provided with two top wheel guide holes, the inside of the circulating wheel is provided with eight elastic brackets, and the side of the elastic bracket away from the center of the circulating wheel is rotatably connected to two top shafts through a bracket, and the bracket of the top shaft is slidably connected in the top wheel guide hole.

[0009] Furthermore, the push rod end of the push cylinder is fixedly connected to an elastic push seat, the center of which is provided with a square push seat guide hole, and the other end of the elastic push seat is fixedly connected to a push spring, the other end of which is fixedly connected to a flow guide.

[0010] Furthermore, the outer end of the flow guide is fixedly connected to a guide column with a square column structure, the end of the guide column is fixedly connected to a limit end plate, and the guide column is slidably connected to the push seat guide hole.

[0011] Furthermore, a fan is fixedly connected inside the air guide shroud, and a filter screen is provided on the side of the fan near the top plate of the air guide shroud.

[0012] Furthermore, the opening of the flow guide shroud is fixedly connected to the flow guide top plate via a threaded connection.

[0013] Furthermore, the top guide plate has an inner guide hole through the center, and the top guide plate has an outer guide hole through the area on the outer periphery of the grinding disc assembly ring groove. Both the inner and outer guide holes are connected to the guide shroud.

[0014] Furthermore, the annular burr grinding disc has a U-shaped cross-section, the outer surface of the annular burr grinding disc is in contact with the inner wall of the grinding disc assembly ring groove, and the annular burr grinding disc is fixedly installed inside the grinding disc assembly ring groove by screws.

[0015] This invention provides a piston pin edge burr removal device, which has the following beneficial effects:

[0016] The burr removal device of this invention can remove burrs on the edge of the piston pin end face by grinding. The piston pin end face, which moves to the grinding area, is in contact with the annular burr grinding disc. The piston pin is driven to rotate rapidly by the cooperation of the workpiece drive and the workpiece rotating pressure shaft, so that the burrs on the edge of the piston pin end face are separated from the annular burr grinding disc by friction. Two grinding areas are set up so that the piston pin moves to different areas and grinds both ends of the end face separately. Compared with the existing grinding device, for workpieces that need to be processed at both ends, the step of adjusting the direction is saved, which significantly improves the speed and ease of operation of piston pin edge burr removal.

[0017] Furthermore, the piston pin end face burr grinding device of this invention has the functions of batch storage, sequential feeding, automatic clamping, and automatic grinding. In the process of burr treatment of multiple piston pins, multiple piston pins can be placed in the feeding channel at the same time. Through the automatic intermittent counterclockwise rotation of the circulating wheel, the piston pins in the feeding channel are rolled sequentially into the piston pin socket and transported to the grinding area for burr treatment. The radial direction of the piston pins reaching the grinding area is automatically restricted by the setting of the workpiece rotation pressure shaft, realizing the automatic positioning function of the piston pins. After the burr treatment is completed, the piston pin socket where the piston pin is located tilts downward as the circulating wheel rotates, and the piston pins automatically roll into the discharge channel, realizing the automatic unloading function. Compared with the traditional grinding machine, the piston pin end face burr treatment device of this application also has the functions of batch storage, sequential feeding, automatic clamping, and sequential unloading. There is no need for manual or robotic arms to perform individual feeding, positioning, and unloading operations for piston pins, which is suitable for batch burr treatment of piston pins.

[0018] Furthermore, in the piston pin edge burr treatment device of this application, the workpiece is driven to rotate by the workpiece drive component, and the piston pin is driven to rotate at high speed inside the piston pin socket by the friction between the workpiece rotating shaft and the outer surface of the piston pin, as well as the rolling connection of the top shaft to the piston pin. The push cylinder controls the guide shroud, the guide top plate and the annular burr grinding plate to come into contact with the piston pin end face, so that the edge of the rotating piston pin end face rubs against the annular burr grinding plate, and the burrs on the edge of the piston pin end face are removed by friction. At the same time, the fan located inside the guide shroud is started, and the air facing the piston pin of the guide top plate is drawn into the guide shroud through the inner guide hole and the outer guide hole. At the same time, the debris falling off the burrs enters the interior of the guide shroud with the flowing air and is intercepted by the filter screen to avoid the debris falling and causing pollution and wear to the device. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0020] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0021] In the attached diagram:

[0022] Figure 1 A schematic diagram of the overall structure of this application is shown;

[0023] Figure 2 A schematic diagram of the front view structure of this application is shown;

[0024] Figure 3 A schematic diagram of the left-side structure of this application is shown;

[0025] Figure 4 A schematic diagram of the front view structure of this application is shown;

[0026] Figure 5 This application shows Figure 1 A structural diagram from the left rear view;

[0027] Figure 6 This paper shows a schematic diagram of the structure in its disassembled state.

[0028] Figure 7 This shows a schematic diagram of the structure from a rear view in the disassembled state of this application;

[0029] Figure 8 A schematic diagram of the cyclic loading wheel of this application is shown;

[0030] Figure 9 A front view structural schematic diagram of the cyclic loading wheel of this application is shown;

[0031] Figure 10A schematic diagram of the structure of the fairing of this application is shown;

[0032] Figure 11 A schematic diagram of the structure of the flow guide top plate of this application is shown;

[0033] Figure 12 A schematic diagram of the structure of the elastic push base of this application is shown.

[0034] Figure label:

[0035] 1. Burr removal machine support; 2. Outer support; 201. Feed channel; 202. Discharge channel; 203. Grinding port; 204. Rotary plate assembly slot; 205. Rotating top plate; 206. Idler wheel; 3. Circulation drive component; 301. Drive gear; 4. Circulation carrier wheel; 401. Piston pin socket; 402. Top wheel storage slot; 403. Top wheel guide hole; 404. Elastic frame plate; 405. Frame plate tension spring; 406. 1. Top shaft; 407. Internal gear ring; 5. Workpiece drive component; 6. Workpiece rotation pressure shaft; 7. Push cylinder; 701. Elastic push seat; 702. Push seat guide hole; 703. Push spring; 8. Flow guide cover; 801. Fan; 802. Filter screen; 803. Guide top column; 804. Limiting end plate; 9. Flow guide top plate; 901. Grinding disc assembly ring groove; 902. Inner flow guide hole; 903. Outer flow guide hole; 10. Annular burr grinding disc. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. Based on the described 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.

[0037] Example 1: Please refer to Figures 1 to 12 :

[0038] This invention proposes a piston pin edge burr removal device, comprising: a burr removal machine support 1, an outer bracket 2 fixedly mounted above the burr removal machine support 1, a circulation drive component 3 fixedly connected to the front of the outer bracket 2, a circulation carrier wheel 4 rotatably mounted on the rotating shaft of the circulation drive component 3 via bearings and a bracket, the circulation carrier wheel 4 being located inside the outer bracket 2, a workpiece drive component 5 fixedly connected to the outer sides of the two bracket plates of the outer bracket 2, a workpiece rotation pressure shaft 6 fixedly connected to the rotating shaft of the workpiece drive component 5, eight piston pin insertion ports 401 opened on the outer wheel surface of the circulation carrier wheel 4, a drive gear 301 fixedly connected to the end of the rotating shaft of the circulation drive component 3, and an idler wheel 206 rotatably connected inside the outer bracket 2. An annular internal gear ring 407 is fixedly connected to the inner surface of the circulating wheel 4. The internal gear ring 407 meshes with an idler wheel 206, which in turn meshes with a drive gear 301. A push cylinder 7 is located at the front and rear of the outer support 2. The push rod of the push cylinder 7 is connected to a flow guide shroud 8. The flow guide shroud 8 is connected to a flow guide top plate 9. The surface of the flow guide top plate 9 has a U-shaped grinding disc assembly ring groove 901. An annular burr grinding disc 10 is installed inside the grinding disc assembly ring groove 901. A feed channel 201 is fixedly connected to the upper right of the outer support 2, and a discharge channel 202 is fixedly connected to the lower left of the outer support 2. Both the feed channel 201 and the discharge channel 202 are in a left-low-right-high configuration. The device is tilted, with the width of the feed channel 201 and the discharge channel 202 equal to the length of the piston pin being processed. The distance between the two plates of the outer support 2 is equal to the length of the piston pin being processed. When the piston pin is placed into the device, it rolls downwards and to the left along the feed channel 201 and contacts the outer surface of the circulating wheel 4. When the piston pin insertion port 401 is aligned with the left end of the feed channel 201, the piston pin automatically rolls into the piston pin insertion port 401 and moves counterclockwise with the rotation of the circulating wheel 4. When the piston pin moves and is below the workpiece rotating pressure shaft 6, the piston pin is tightly rolled and connected to the support plate tension spring 405 under the pressing action of the workpiece rotating pressure shaft 6, thus achieving radial locking of the piston pin. The piston pin is axially limited by the rotating top plate 205 and the annular burr grinding disc 10. The piston pin is driven to rotate at high speed by the rotation of the workpiece rotating pressure shaft 6, so that the burrs on the end face of the piston pin rub against the annular burr grinding disc 10, causing the burrs to fall off, thus achieving the burr treatment of the piston pin. After the burr treatment of both ends of the piston pin is completed, the piston pin rolls into the discharge channel 202 as the circulating carrier wheel 4 rolls, and rolls down along the discharge channel 202 for discharge. It has the functions of batch storage, sequential feeding, automatic clamping, and sequential unloading. There is no need for manual or robotic arm to perform individual feeding, positioning and unloading operations of piston pins. It is suitable for batch burr treatment of piston pins.

[0039] In this embodiment, the front and rear plates of the outer support 2 are each provided with a semi-circular notch grinding port 203, and the two grinding ports 203 are staggered. The two grinding ports 203 are coaxial with the two guide top plates 9 respectively. The front and rear plates of the outer support 2 are each provided with a rotary plate assembly groove 204, and the two rotary plate assembly grooves 204 are staggered. The rotary plate assembly groove 204 is connected to a rotating top plate 205 through a bearing. The two sets of workpiece driving components 5, workpiece rotating pressure shaft 6, push cylinder 7, guide top plate 9 and other components corresponding to the two grinding ports 203 form two sets of end face burr treatment mechanisms, which grind the burrs on the two end face edges of the piston pin respectively, omitting the step of turning the piston pin orientation.

[0040] In this embodiment, the inner wall of the piston pin insertion port 401 is provided with two top wheel receiving grooves 402, and the bottom of the piston pin insertion port 401 is provided with two top wheel guide holes 403. The circulating wheel 4 is provided with eight elastic support plates 404. The side of the elastic support plate 404 away from the center of the circulating wheel 4 is rotatably connected to two top shafts 406 through a bracket. The bracket of the top shaft 406 is slidably connected in the top wheel guide holes 403. Under normal conditions, the elastic support plate 404 pushes the top shaft 406 toward the opening of the piston pin insertion port 401 under the tension of the support plate spring 405. When the piston shaft outside the top shaft 406 moves to below the workpiece rotating pressure shaft 6, the top shaft 406 is pushed by the pressure of the workpiece rotating pressure shaft 6, causing the frame plate tension spring 405 to stretch. Under the action of the frame plate tension spring 405, the piston shaft is tightly attached to the top shaft 406 and the workpiece rotating pressure shaft 6 and rolled together, locking the piston pin in the radial direction. In this state, the high-speed rotation of the workpiece rotating pressure shaft 6 can drive the piston pin to rotate synchronously at high speed, so that the piston pin can rub against the annular burr grinding disc 10, and the burrs on the end face of the piston pin are effectively treated by friction.

[0041] In this embodiment, the push rod end of the push cylinder 7 is fixedly connected to an elastic push seat 701. The center of the elastic push seat 701 is provided with a square push seat guide hole 702. The other end face of the elastic push seat 701 is fixedly connected to a push spring 703. The other end of the push spring 703 is fixedly connected to a flow guide 8. The outer end of the flow guide 8 is fixedly connected to a square column structure guide top post 803. The end of the guide top post 803 is fixedly connected to a limit end plate 804. The guide top post 803 is slidably connected to the push seat guide hole 702. Through the cooperation of the elastic push seat 701 and the guide top post 803, the push cylinder 7 pushes the flow guide 8, the flow guide top plate 9 and the annular burr grinding plate 10 toward the piston shaft, compressing the push spring 703, so that the annular burr grinding plate 10 always keeps tightly pressed against the burr edge of the piston shaft end face.

[0042] In this embodiment, a fan 801 is fixedly connected inside the flow guide shroud 8. A filter 802 is provided on the side of the fan 801 near the flow guide top plate 9. An inner flow guide hole 902 is opened through the center of the flow guide top plate 9, and an outer flow guide hole 903 is opened through the area of ​​the outer periphery of the grinding disc assembly ring groove 901 of the flow guide top plate 9. Both the inner flow guide hole 902 and the outer flow guide hole 903 are connected to the flow guide shroud 8. The burrs on the piston pin end face are removed by friction. At the same time, the fan 801 inside the flow guide shroud 8 is started, and the air on the side of the flow guide top plate 9 facing the piston pin is drawn into the flow guide shroud 8 through the inner flow guide hole 902 and the outer flow guide hole 903. Meanwhile, the debris falling off the burrs enters the interior of the flow guide shroud 8 with the flowing air and is intercepted by the filter 802 to prevent the debris from falling and causing pollution and wear to the device.

[0043] In this embodiment, the opening of the flow guide shroud 8 is fixedly connected to the flow guide top plate 9 by a threaded connection, which facilitates the disassembly of the flow guide top plate 9 and the cleaning of the waste accumulated inside the flow guide shroud 8.

[0044] In Example 2, based on Example 1, the annular burr grinding disc 10 has a U-shaped cross-section. The outer surface of the annular burr grinding disc 10 is in contact with the inner wall of the grinding disc assembly ring groove 901. The annular burr grinding disc 10 is fixedly installed inside the grinding disc assembly ring groove 901 by screws. The annular burr grinding disc 10 can be disassembled by screws, which facilitates the replacement of old annular burr grinding discs 10. The annular burr grinding disc 10 with this structure can simultaneously contact the outer edge and the inner edge of the piston shaft end face with an inner hole, and remove the burrs on the outer edge and the inner edge at the same time.

[0045] The working principle of this embodiment is as follows: The circulating drive component 3, the workpiece drive component 5, and the push cylinder 7 are connected to the PLC control system and the corresponding control program is set. First, the circulating drive component 3 is started by the PLC control system. The gear transmission formed by the meshing connection of the drive gear 301, idler gear 206, and internal gear ring 407 drives the circulating carrier wheel 4 to rotate counterclockwise. The piston shaft that needs to be deburred is placed in the feed channel 201 and rolls to the lower left end of the inclined surface of the feed channel 201, and contacts the circulating carrier wheel 4. The circulating carrier wheel 4 automatically and intermittently... Rotating counterclockwise causes the piston pins in the feed channel 201 to roll sequentially into the piston pin inlet 401 as the circulating wheel 4 rotates, and then transfer to the area below the workpiece rotating pressure shaft 6. During this process, the piston pins tightly press the top shaft 406, making the two top shafts 406, the workpiece rotating pressure shaft 6, and the outer surface of the piston shaft tightly roll together. The workpiece drive 5 is activated, driving the workpiece rotating pressure shaft 6 to rotate at high speed. The rotation of the workpiece rotating pressure shaft 6 drives the piston shaft to rotate at high speed through friction. The push cylinder 7 controls the guide shroud 8 and the guide top plate 9 to... The piston shaft end is pushed, causing the annular burr grinding disc 10 to come into contact with the edge of the rotating piston shaft. The other end of the piston shaft comes into contact with the rotating top plate 205, axially limiting the shaft. Friction is generated between the rotating piston shaft and the annular burr grinding disc 10, which grinds away the burrs. After the single-end treatment is completed, the shaft is transported to the location of the other grinding port 203 as the circulating wheel 4 rotates. The burrs on the other end face of the piston shaft are treated in the same way. After the burrs on both ends of the piston pin are treated, the piston pin rolls down to the outlet as the circulating wheel 4 rolls. The material is discharged by rolling downwards along the discharge channel 202 in the material channel 202; during the grinding of the piston shaft by the guide plate 9, the fan 801 is started, and the air facing the piston pin of the guide plate 9 is drawn into the guide shroud 8 through the inner guide hole 902 and the outer guide hole 903. At the same time, the debris falling off the burrs enters the interior of the guide shroud 8 with the flowing air and is intercepted by the filter screen 802 to prevent the debris from falling and causing pollution and wear to the device. The guide plate 9 is rotated and disassembled periodically to replace the debris inside the guide shroud 8 and the worn annular burr grinding disc 10.

[0046] The following points should be noted in this article:

[0047] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in general design.

[0048] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0049] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A piston pin edge burr removal device, comprising: A burr removal machine support (1) is characterized in that an outer bracket (2) is fixedly installed above the burr removal machine support (1), a circulating drive component (3) is fixedly connected to the front of the outer bracket (2), a circulating wheel (4) is rotatably mounted on the shaft of the circulating drive component (3) through bearings and a bracket, the circulating wheel (4) is located inside the outer bracket (2), a workpiece drive component (5) is fixedly connected to the outside of the two plates of the outer bracket (2), a workpiece rotating pressure shaft (6) is fixedly connected to the shaft of the workpiece drive component (5), eight piston pin insertion holes (401) are opened on the outer wheel surface of the circulating wheel (4), a drive gear (301) is fixedly connected to the end of the shaft of the circulating drive component (3), an idler wheel (206) is rotatably connected inside the outer bracket (2), and the circulating wheel (4) is rotatably connected inside the outer bracket (2). An internal gear ring (407) with an annular structure is fixedly connected to the surface. The internal gear ring (407) meshes with an idler wheel (206). The idler wheel (206) meshes with a drive gear (301). A push cylinder (7) is provided at the front and rear of the outer support (2). The push rod of the push cylinder (7) is connected to a flow guide shroud (8). The flow guide shroud (8) is connected to a flow guide top plate (9). The flow guide top plate (9) has a grinding disc assembly ring groove (901) with a "U" shaped cross section. An annular burr grinding disc (10) is installed inside the grinding disc assembly ring groove (901). A feed channel (201) is fixedly connected to the upper right of the outer support (2). A discharge channel (202) is fixedly connected to the lower left of the outer support (2). Both the feed channel (201) and the discharge channel (202) are inclined with the left side lower than the right side.

2. The piston pin edge burr removal device according to claim 1, characterized in that, The front and rear plates of the outer support (2) are respectively provided with a semi-circular notch grinding port (203). The two grinding ports (203) are staggered and are coaxial with the two guide top plates (9).

3. The piston pin edge burr removal device according to claim 1, characterized in that, The outer support (2) has a rotating plate assembly slot (204) on the front plate and the rear plate respectively. The two rotating plate assembly slots (204) are staggered. The rotating plate assembly slot (204) is connected to a rotating top plate (205) through a bearing.

4. The piston pin edge burr removal device according to claim 1, characterized in that, The piston pin socket (401) has two top wheel receiving grooves (402) on its inner wall. The bottom of the piston pin socket (401) has two top wheel guide holes (403). The circulating wheel (4) has eight elastic brackets (404) inside. The side of the elastic bracket (404) away from the center of the circulating wheel (4) is rotatably connected to two top shafts (406) through a bracket. The bracket of the top shaft (406) is slidably connected in the top wheel guide hole (403).

5. The piston pin edge burr removal device according to claim 1, characterized in that, The push rod end of the push cylinder (7) is fixedly connected to an elastic push seat (701). The center of the elastic push seat (701) is provided with a square push seat guide hole (702). The other end face of the elastic push seat (701) is fixedly connected to a push spring (703). The other end of the push spring (703) is fixedly connected to a flow guide (8).

6. The piston pin edge burr removal device according to claim 5, characterized in that, The outer end of the flow guide (8) is fixedly connected to a guide top column (803) with a square column structure. The end of the guide top column (803) is fixedly connected to a limit end plate (804). The guide top column (803) is slidably connected to the push seat guide hole (702).

7. The piston pin edge burr removal device according to claim 1, characterized in that, A fan (801) is fixedly connected inside the flow guide (8), and a filter (802) is provided on the side of the fan (801) near the top plate (9).

8. The piston pin edge burr removal device according to claim 1, characterized in that, The opening of the flow guide shroud (8) is fixedly connected to the flow guide top plate (9) by a threaded connection.

9. The piston pin edge burr removal device according to claim 1, characterized in that, The guide plate (9) has an inner guide hole (902) through the center, and an outer guide hole (903) through the outer periphery of the grinding disc assembly ring groove (901). The inner guide hole (902) and the outer guide hole (903) are both connected to the guide shroud (8).

10. A piston pin edge burr removal device according to claim 9, characterized in that, The annular burr grinding disc (10) has a "U" shaped cross section. The outer surface of the annular burr grinding disc (10) is in contact with the inner wall of the grinding disc assembly ring groove (901). The annular burr grinding disc (10) is fixedly installed inside the grinding disc assembly ring groove (901) by screws.

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