Polishing device for piston pin machining

Abstract

The invention is applicable to the technical field of piston pin processing, and provides a polishing device for piston pin processing, comprising: a polishing frame, two ends of which are respectively provided with a feeding frame and a discharging frame; a movable shaft sleeve and a clamping shaft are rotationally connected to the movable seat, the movable shaft sleeve is arranged on a fixed shaft in a sleeving mode, the fixed shaft is arranged on the polishing frame, clamping plates are arranged at the two ends of the clamping shaft, a movable gear is rotationally arranged on the movable shaft sleeve, and a clamping gear is rotationally arranged on the clamping shaft; a conveying belt is arranged on the feeding frame, ratchets are arranged on the side wall of the conveying belt, a feeding auxiliary shaft is rotationally arranged on the feeding frame, and an auxiliary seat is arranged on the feeding auxiliary shaft; and an inclined guide plate is arranged between the discharging frame and the polishing frame, a limiting shaft is rotationally arranged on the polishing frame, and a discharging shifting piece is arranged on the limiting shaft. Therefore, automatic feeding, polishing and discharging of the piston pin can be achieved, the automation degree and the machining efficiency of the device are improved, polishing dead corners can be avoided, and the good polishing effect is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of piston pin processing, and particularly relates to a polishing device for piston pin processing. BACKGROUND

[0002] The piston pin is an important part in an engine and is used for connecting the piston and the connecting rod, and its function is to transmit the gas force borne by the piston to the connecting rod or to make the small head of the connecting rod move together with the piston. In the processing of the piston pin, the outer wall of the piston pin needs to be polished.

[0003] There are various piston pin polishing devices in the prior art. For example, a piston pin polishing and grinding tool is disclosed in Chinese Patent No. CN222874039U, which comprises a fixed frame, a polishing part is arranged at the rear side of the horizontal seat, the polishing part comprises a horizontally movable support, a detachable movable seat is arranged at the opening of the support, a second electric cylinder for driving the horizontal movement of the support is arranged at the rear end of the fixed frame, a plurality of detachable polishing blocks for polishing the piston pin are arranged at the front end face of the movable seat, and the polishing blocks can polish multiple piston pins at a time. However, the device lacks an automatic feeding mechanism, and manual disassembly and assembly of the multiple piston pins are needed, which leads to low work efficiency and high labor intensity, and the device is inconvenient to use.

[0004] In summary, the prior art has obvious inconvenience and defects in actual use, and therefore needs to be improved. SUMMARY

[0005] In view of the above defects, the present application aims to provide a polishing device for piston pin processing, which can realize automatic feeding, polishing and discharging of the piston pin, improve the automation degree and processing efficiency of the device, and avoid the occurrence of polishing dead angles, thereby ensuring good polishing effect.

[0006] To achieve the above objectives, the present invention provides a polishing device for piston pin machining, comprising: a polishing frame with an loading rack and a unloading rack at both ends, and rotatable polishing rollers at both sides of the middle portion of the polishing frame; a movable seat slidably mounted on the polishing frame, a movable bushing and a clamping shaft rotatably connected to the movable seat, the movable bushing being sleeved on a fixed shaft, the fixed shaft being mounted on the polishing frame, clamping plates at both ends of the clamping shaft, a drive shaft between the movable bushing and the clamping shaft, and an installation bushing elastically connected to the end of the drive shaft near the polishing frame, the installation bushing being provided with a main... The system includes a gear and a secondary gear, with a movable gear rotatably mounted on the movable bushing and a clamping gear rotatably mounted on the clamping shaft; a loading rack with a conveyor belt, ratchet teeth on the sidewalls of the conveyor belt, a loading auxiliary shaft rotatably mounted on the loading rack, an auxiliary seat mounted on the loading auxiliary shaft, and an auxiliary pawl rotatably mounted on the auxiliary seat to engage with the ratchet teeth; and a unloading rack with an inclined guide plate between it and the polishing rack, an unloading auxiliary shaft rotatably mounted on the polishing rack, an active swing arm mounted on the unloading auxiliary shaft, a limiting shaft rotatably mounted on the polishing rack, and an unloading lever and a driven swing arm mounted on the limiting shaft.

[0007] According to the polishing apparatus for piston pin processing of the present invention, a positive ratchet is provided on one side wall of the moving gear, a positive pawl is rotatably provided on the moving bushing, a negative ratchet is provided on one side wall of the clamping gear, and a negative pawl is rotatably provided on the clamping shaft.

[0008] According to the polishing apparatus for piston pin processing of the present invention, the top surface of the movable seat is provided with a plurality of top support plates, the movable bushing and the clamping shaft are rotatably connected to the top support plates, the drive shaft passes through the top support plates, the movable seat is provided with a drive member, one of the top support plates is rotatably connected to a drive bushing that is slidably sleeved outside the drive shaft, and the output shaft of the drive member is connected to the drive bushing by a belt drive.

[0009] According to the polishing apparatus for piston pin processing of the present invention, a positioning disk is fixedly connected to the drive shaft, the positioning disk is located on one of the top support plates near the loading rack, a spring disk is rotatably provided on the drive shaft, the spring disk is located on the side of the top support plate away from the loading rack, and a second spring is provided between the spring disk and the top support plate.

[0010] According to the polishing apparatus for piston pin processing of the present invention, a drive shaft is rotatably provided on the loading rack, the drive shaft is connected to the loading auxiliary shaft by belt drive, the drive shaft is provided with a loading auxiliary key, the auxiliary gear is provided with a loading keyway, the end of the drive shaft away from the loading rack is provided with a unloading auxiliary key, the unloading auxiliary shaft is provided with an end plate, and the end plate is provided with an unloading keyway.

[0011] According to the polishing apparatus for piston pin processing of the present invention, each clamping plate is rotatably provided with a rotating jaw, each rotating jaw is provided with a turntable, each turntable is provided with an eccentric rod, each eccentric rod is rotatably connected to a rocker arm, the bottom end of the rocker arm is rotatably connected to a lifting seat, the bottom end of each lifting seat is provided with an extension rod passing through a movable seat, the bottom end of each extension rod is provided with a sliding sleeve, the sliding sleeve is slidably fitted onto a lifting bracket, the bottom end of the lifting bracket is provided with a bottom rod, the polishing frame is provided with a bottom bracket, and the bottom bracket is provided with a wave bracket.

[0012] According to the polishing apparatus for piston pin processing of the present invention, two arc-shaped support plates are rotatably provided on one side of the loading rack. The arc-shaped support plates are both located above the polishing rack. The arc-shaped support plates are rotatably connected to the loading rack through a positioning shaft. A connecting member is provided on the positioning shaft. A sliding frame is slidably provided on the loading rack. A connecting rope is provided between the sliding frame and the connecting member.

[0013] According to the polishing apparatus for piston pin processing of the present invention, the auxiliary seat is provided with a release seat on the side near the polishing frame, the release seat is slidably connected to the loading frame, and a connecting rod is rotatably provided between the release seat and the sliding frame.

[0014] According to the polishing apparatus for piston pin processing of the present invention, the top surface of the loading rack is located higher than the top surface of the polishing rack, and the top surface of the unloading rack is located lower than the top surface of the polishing rack.

[0015] The purpose of this invention is to provide a polishing device for piston pin machining, which has the following advantages:

[0016] 1. By setting up polishing racks, loading racks, and unloading racks, the loading, polishing, and unloading of piston pins can be automatically realized, which improves the automation level and processing efficiency of the device, reduces the number of personnel required and labor intensity, and reduces labor costs.

[0017] 2. By setting up mechanisms such as rotating jaws, turntables, and eccentric rods, the piston pin can be clamped during the polishing process, improving the stability of the device, and the piston pin can be driven to rotate, avoiding polishing dead angles and ensuring good polishing results.

[0018] In summary, the beneficial effects of the present invention are: it can realize the automatic feeding, polishing and unloading of piston pins, improving the automation level and processing efficiency of the device, and can avoid polishing dead corners, ensuring good polishing effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a partial structural schematic diagram of the present invention;

[0021] Figure 3 This is an enlarged schematic diagram of the structure at the movable seat;

[0022] Figure 4 yes Figure 3 Enlarged schematic diagram of part A of the structure;

[0023] Figure 5 This is a structural diagram of the loading rack;

[0024] Figure 6 yes Figure 5 Enlarged schematic diagram of part B structure;

[0025] Figure 7 This is a structural diagram of the unloading rack;

[0026] Figure 8 This is a schematic diagram of the auxiliary pawl structure;

[0027] In the diagram: 1-Polishing frame, 11-Fixed shaft, 12-Base support, 13-Wave support, 14-Guide rail, 2-Moving seat, 21-Top support plate, 22-Moving bushing, 23-Moving gear, 24-Positive ratchet, 3-Piston pin, 4-Drive shaft, 41-Drive bushing, 42-Drive component, 43-Main gear, 44-Secondary gear, 45-Positioning plate, 46-Spring plate, 47-Unloading auxiliary key, 48-Mounting bushing, 5-Clamping shaft, 51-Clamping gear, 511-Clamping plate, 512-Reverse ratchet, 52-Rotating jaw, 53-Turntable, 531-Eccentric rod, 54-Rock arm, 55-Lifting seat, 56-Extension rod, 57-Sliding kit, 58-Lifting... 59-Bottom rod, 6-Loading frame, 61-Conveyor belt, 62-Anti-slip rib, 63-Ratchet, 64-Loading auxiliary shaft, 641-Auxiliary seat, 642-Protruding plate, 643-Auxiliary pawl, 65-Arc-shaped support plate, 651-Positioning shaft, 652-Connector, 66-Release seat, 661-Release linkage, 67-Sliding frame, 671-Connecting rope, 68-Drive shaft, 69-Loading auxiliary key, 7-Unloading frame, 71-Inclined guide plate, 72-Unloading auxiliary shaft, 73-End plate, 74-Active swing arm, 75-Limiting shaft, 76-Unloading lever, 77-Driven swing arm, 78-Baffle, 8-Working box, 81-Polishing roller, 82-Spray nozzle, 83-Liquid pipe. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0029] See Figures 1-8The present invention provides a polishing apparatus for piston pin machining, comprising:

[0030] A polishing frame 1 is set on the ground or other supporting surface. A work box 8 is set on both sides of the middle part of the polishing frame 1. A polishing roller 81 is rotatably connected to each work box 8. The polishing roller 81 is used for polishing. Each work box 8 is equipped with a polishing motor for driving the polishing roller 81 to rotate (driving the shaft to rotate by a motor is a mature existing technology, and its principle and specific structure will not be described in detail). A nozzle 82 is fixedly connected to one of the work boxes 8. The nozzle 82 is fixedly connected to a liquid pipe 83. When polishing is performed, water or other liquid is sprayed from the nozzle 82 to assist the polishing operation. A loading rack 6 and a unloading rack 7 are respectively set at both ends of the polishing frame 1.

[0031] The movable seat 2 is slidably connected to the guide rail 14. The two ends of the guide rail 14 are respectively fixedly connected to the two end side walls of the polishing frame 1. The movable seat 2 can reciprocate horizontally along the guide rail 14. Multiple top support plates 21 are fixedly connected to the top surface of the movable seat 2. The top of the top support plate 21 is rotatably connected to the movable bushing 22. The movable bushing 22 is sleeved on the fixed shaft 11. The two ends of the fixed shaft 11 are respectively fixedly connected to the two end side walls of the polishing frame 1. The surface of the fixed shaft 11 is provided with a first reciprocating groove (the first reciprocating groove can refer to the groove structure on the surface of the reciprocating screw, which is a mature existing technology, so it will not be described in detail). The movable bushing 22 is provided with a through hole for the fixed shaft 11 to pass through. The inner side wall of the through hole is fixedly connected with a guide post corresponding to the first reciprocating groove. When the movable bushing 22 rotates in one direction, under the cooperation of the first reciprocating groove and the guide post, the movable seat 2 can reciprocate along the fixed shaft 11.

[0032] The clamping shaft 5 is located below the movable bushing 22. The clamping shaft 5 and the top support plate 21 are rotatably connected. The clamping plates 511 are provided at both ends of the clamping shaft 5. The clamping plates 511 are slidably connected to the movable seat 2. The end sidewalls of the clamping shaft 5 are provided with second reciprocating grooves (the structure of which is the same as that of the first reciprocating groove). The clamping plates 511 and the second reciprocating grooves are matched one-to-one (the matching method is the same as that of the movable bushing 22 and the first reciprocating groove). Each clamping plate 511 has a rotating jaw 52 rotatably connected to its top end. The rotating jaw 52 is used to clamp the piston pin 3. A turntable 53 is fixedly connected to the end of the rotating jaw 52 away from the center of the moving seat 2. An eccentric rod 531 is fixedly connected to the side wall of the turntable 53 away from the rotating jaw 52. The eccentric rod 531 is not coaxial with the turntable 53. A rocker arm 54 is rotatably connected to the eccentric rod 531. The bottom end of the rocker arm 54 is rotatably connected to the lifting seat 55. The bottom surface of the lifting seat 55 is fixed. An extension rod 56 is connected, and the extension rod 56 passes through the movable seat 2 and is fixedly connected to the sliding kit 57. The movable seat 2 has a relief groove corresponding to the extension rod 56. The sliding kit 57 is slidably sleeved on the lifting bracket 58. A bottom rod 59 extending downward is fixedly connected to the center of the lifting bracket 58. A bottom bracket 12 is provided at the bottom of the polishing frame 1. Both ends of the bottom bracket 12 are fixedly connected to the polishing frame 1. A wave bracket 13 corresponding to the bottom rod 59 is fixedly connected to the bottom bracket 12.

[0033] A drive shaft 4 is located between a movable bushing 22 and a clamping shaft 5. The drive shaft 4 passes through a top support plate 21. A drive bushing 41 is slidably sleeved on the drive shaft 4. The drive bushing 41 is rotatably connected to one of the top support plates 21. A drive component 42 is fixedly mounted on the movable seat 2. The output shaft of the drive component 42 is connected to the drive bushing 41 via a belt drive. A mounting bushing 48 is slidably mounted on one end of the drive shaft 4 near the loading rack 6. A first spring is provided between the mounting bushing 48 and one of the top support plates 21. The two ends of the first spring are fixedly connected to the side walls of the top support plate 21 and the mounting bushing 48, respectively. Furthermore, the first spring can be both compressed and stretched. A main gear 43 is fixedly connected to the mounting sleeve 48. A secondary gear 44 is fixedly connected to the mounting sleeve 48 on the side of the main gear 43 closest to the feeding rack 6. There is clearance space between the main gear 43 and the secondary gear 44. A movable gear 23 that meshes with the main gear 43 is rotatably connected to the movable sleeve 22. A positive ratchet 24 is fixedly connected to one side wall of the movable gear 23. The positive ratchet 24, the movable gear 23, and the movable sleeve 22 are concentric. A unidirectional rotatable positive pawl is rotatably connected to the movable sleeve 22. A clamping gear 51 that meshes with the secondary gear 44 is rotatably connected to the clamping shaft 5. A negative ratchet 512 is fixedly connected to one side wall of the clamping gear 51. The negative ratchet 512 has the same structure as the positive ratchet 24 but is in the opposite direction. The negative ratchet 512, the clamping gear 51, and the clamping shaft 5 are concentric. A unidirectional rotatable negative pawl is rotatably connected to the clamping shaft 5. The rotation direction of the negative pawl is opposite to that of the positive pawl.

[0034] The loading rack 6 is fitted with a conveyor belt 61, which is used to transport the piston pin 3 to the polishing rack 1. The top surface of the loading rack 6 is higher than the top surface of the polishing rack 1. A drive shaft 68 is rotatably connected to the side wall of the loading rack 6. The drive shaft 68 passes through the polishing rack 1 and is fixedly connected to the loading auxiliary key 69. The side wall of the secondary gear 44 is provided with a loading keyway that corresponds to the loading auxiliary key 69. When the moving seat 2 is located at the end of its movement range closest to the loading rack 6, the loading auxiliary key 69 corresponds to the loading keyway, and the first spring is compressed. The secondary gear 44 disengages from the clamping gear 51. At this time, the drive shaft 4 cannot drive the clamping gear 51 to rotate. A positioning disc 45 is fixedly connected to the drive shaft 4. The positioning disc 45 is located on one of the top support plates 21 near the loading rack 6. When the first spring is in its natural state, the positioning disc 45 abuts against the top support plate 21, so that when the loading auxiliary key 69 pushes the mounting sleeve 48, the drive shaft 4 does not move horizontally. A spring disc 46 is provided on the side of the top support plate 21 away from the loading rack 6. The spring disc 46 is rotatably connected to the drive shaft 4. A second spring is provided between the spring disc 46 and the top support plate 21. That is, the two ends of the second spring are fixedly connected to the spring disc 46 and the top support plate 21 respectively. Furthermore, the second spring is a compression spring.

[0035] A feeding auxiliary shaft 64 is rotatably connected to the side wall of the feeding frame 6. The feeding auxiliary shaft 64 is located above the transmission shaft 68, and the transmission shaft 68 and the feeding auxiliary shaft 64 are connected by belt drive. An auxiliary seat 641 is provided on the feeding auxiliary shaft 64. The auxiliary seat 641 is slidably connected to the feeding frame 6. Two protruding plates 642 are fixedly connected to the top surface of the auxiliary seat 641. Several ratchet teeth 63 are fixedly connected to the side wall of the conveyor belt 61. A unidirectional rotatable auxiliary pawl 643 is rotatably connected to each of the protruding plates 642. That is, when the auxiliary seat 641 moves towards the polishing frame 1, the auxiliary pawl 643 can rotate. When the auxiliary seat 641 moves away from the polishing frame 1, the auxiliary pawl 643 cannot rotate. At this time, the auxiliary pawl 643 and the ratchet teeth 63 cooperate, and the auxiliary seat 641 can drive the conveyor belt 61 to rotate.

[0036] Two arc-shaped support plates 65 are rotatably connected to the side wall of the loading rack 6 near the polishing rack 1. The arc-shaped support plates 65 are both located above the polishing rack 1. When the conveyor belt 61 drives the piston pin 3 to move onto the arc-shaped support plate 65, the piston pin 3 is located directly above the moving seat 2. Positioning shafts 651 are fixedly connected to both ends of the arc-shaped support plate 65. The positioning shafts 651 are rotatably connected to the loading rack 6 and the polishing rack 1, respectively. After passing through the side wall of the loading rack 6, the positioning shafts 651 connected to the loading rack 6 are fixedly connected to connecting parts 652. A sliding frame 67 is slidably connected to the side wall of the loading rack 6. A connecting rope 671 is fixedly connected between the connecting parts 652 and the sliding frame 67. When the sliding frame 67 moves downward, it can drive the connecting parts 652 to rotate at a certain angle, thereby causing the piston pin 3 to fall onto the polishing rack 1. A release seat 66 is provided on the side of the auxiliary seat 641 near the polishing frame 1. The release seat 66 is slidably connected to the loading frame 6. A third spring is connected between the release seat 66 and the side wall of the loading frame 6. That is, the two ends of the third spring are fixedly connected to the side wall of the release seat 66 and the side wall of the loading frame 6, respectively. Furthermore, the third spring is a compression spring. A release connecting rod 661 is rotatably connected between the release seat 66 and the sliding frame 67. That is, one end of the release connecting rod 661 is rotatably connected to the release seat 66, and the other end of the release connecting rod 661 is rotatably connected to the sliding frame 67. When the third spring is in its natural state, the arc-shaped support plate 65 can support the piston pin 3.

[0037] The unloading rack 7 is located at the end of the polishing rack 1 away from the loading rack 6. The top surface of the unloading rack 7 is lower than the top surface of the polishing rack 1. An inclined guide plate 71 is fixedly connected between the polishing rack 1 and the unloading rack 7. The inclined guide plate 71 is used to provide support and guidance for the rolling unloading of the piston pin 3. An unloading auxiliary shaft 72 is rotatably connected to the side wall of the polishing rack 1 away from the loading rack 6. An end plate 73 is fixedly connected to one end of the unloading auxiliary shaft 72. The end plate 73 is provided with an unloading keyway. An unloading auxiliary key 47 is fixedly connected to the drive shaft 4. When the moving seat 2 is located at the end of its movement range closest to the unloading rack 7, the unloading auxiliary key 47 corresponds to the unloading keyway, the second spring is compressed, and the first spring is stretched. At this time, the clamping gear 51 corresponds to the clearance space. The other end of the feeding auxiliary shaft 72 is fixedly connected to an active rocker arm 74. A limit shaft 75 is rotatably connected to the polishing frame 1. A feeding pusher 76 is fixedly connected to the limit shaft 75. A driven rocker arm 77 corresponding to the active rocker arm 74 is fixedly connected to the limit shaft 75. When the feeding auxiliary shaft 72 drives the active rocker arm 74 to rotate, the active rocker arm 74 pushes the driven rocker arm 77 to rotate, causing the limit shaft 75 to drive the feeding pusher 76 to rotate, thereby pushing the piston pin 3 on the moving seat 2 to the inclined guide plate 71. Under the action of gravity, the piston pin 3 rolls onto the feeding frame 7. An automatic conveying device can be set on the feeding frame 7 to convey the polished piston pin 3 to the next process.

[0038] See Figures 1-8Preferably, the length of the main gear 43 is greater than the length of the secondary gear 44, so that the main gear 43 and the moving gear 23 are always in mesh during the reciprocating motion of the drive shaft 4.

[0039] See Figures 1-8 Preferably, a number of anti-slip ribs 62 are fixedly connected to the working surface (i.e., outer surface) of the conveyor belt 61 to ensure good conveying effect.

[0040] See Figures 1-8 Preferably, the top of the arc-shaped support plate 65 is an arc segment, and the bottom of the arc-shaped support plate 65 is a straight segment. When the third spring is in its natural state, the arc segment provides support for the piston pin 3. When the sliding frame 67 is at the lowest end of its range of motion, the straight segment is in a vertical state. At this time, the distance between the two straight segments is slightly larger than the diameter of the piston pin 3. The straight segment can guide the piston pin 3 so that the piston pin 3 falls accurately on the polishing frame 1.

[0041] See Figures 1-8 Preferably, a baffle 78 is fixedly connected to the unloading rack 7 to prevent the piston pin 3 from rolling to the ground.

[0042] See Figures 1-8 Preferably, belt drive is a conventional technical operation for those skilled in the art and can be implemented without creative effort. Those skilled in the art should be able to think of selecting a suitable pulley to assist in completing the transmission according to the actual situation. Users can also use chain drive to replace belt drive to ensure good transmission efficiency. The sprocket installation and chain-sprocket matching involved are existing technologies and will not be described in detail here.

[0043] See Figures 1-8Preferably, bearings, bushings, etc., can be used between the polishing roller 81 and the work box 8, between the moving bushing 22 and the top support plate 21, between the clamping shaft 5 and the top support plate 21, between the clamping plate 511 and the rotating jaw 52, ​​between the rocker arm 54 and the eccentric rod 531, between the drive bushing 41 and the top support plate 21, between the moving bushing 22 and the moving gear 23, between the clamping shaft 5 and the clamping gear 51, between the loading rack 6 and the transmission shaft 68, between the spring disc 46 and the drive shaft 4, between the loading auxiliary shaft 64 and the loading rack 6, between the positioning shaft 651 and the loading rack 6, between the positioning shaft 651 and the polishing frame 1, between the unloading auxiliary shaft 72 and the unloading rack 7, and between the limiting shaft 75 and the polishing frame 1. The following connections can be made using mechanisms such as pins, hinges, etc.: between rocker arm 54 and lifting seat 55, between moving bushing 22 and positive pawl, between clamping shaft 5 and negative pawl, between convex plate 642 and auxiliary pawl 643, between release link 661 and release seat 66, and between release link 661 and sliding frame 67. The following connections can also be made using mechanisms such as sliding grooves: between moving seat 2 and guide rail 14, between clamping plate 511 and moving seat 2, between sliding kit 57 and lifting bracket 58, between drive shaft 4 and drive bushing 41, between drive shaft 4 and mounting bushing 48, between auxiliary seat 641 and loading rack 6, between sliding frame 67 and loading rack 6, and between release seat 66 and loading rack 6.

[0044] See Figures 1-8 Preferably, the drive unit 42 is a rotary motor that can provide sufficient power.

[0045] In the implementation of this invention: The drive unit 42 is activated, causing the drive shaft 4 to rotate forward. At this time, the positive ratchet 24 engages with the positive pawl, while the negative ratchet 512 does not engage with the negative pawl. The drive shaft 4 drives the moving bushing 22 to rotate. Under the action of the first reciprocating groove and the guide post, the moving seat 2 moves towards the upper feed rack 6 until the moving seat 2 reaches the end of its movement range closest to the feed rack 6. At this time, the feeding auxiliary key 69 corresponds to the feeding keyway, the first spring is compressed, and the positioning plate 45 abuts against... When the top support plate 21 is close to it, the second spring is in its natural state, the secondary gear 44 does not mesh with the clamping gear 51, the drive component 42 reverses, the positive ratchet 24 does not engage with the positive pawl, the negative ratchet 512 engages with the negative pawl, the drive shaft 4 drives the feeding auxiliary shaft 64 to rotate, causing the auxiliary seat 641 to move away from the polishing frame 1, the auxiliary pawl 643 engages with the ratchet 63, driving the conveyor belt 61 to run, transporting the piston pin 3 to the arc-shaped support plate 65, and then the auxiliary seat 641 moves in the opposite direction. During this period, the auxiliary pawl 643 does not engage with the ratchet 63 until the auxiliary seat 641 abuts against and pushes the release seat 66 to move. Under the action of the release linkage 661, the sliding frame 67 descends, causing the arc-shaped support plate 65 to rotate. The piston pin 3 on the arc-shaped support plate 65 falls onto the polishing frame 1 between the two clamping plates 511. Then the drive member 42 rotates forward, causing the moving seat 2 to move towards the lower material rack 7. The first spring returns to its natural state. Then the drive member 42 reverses, causing the clamping shaft 5 to rotate. The two clamping plates 511 move closer to each other, and the rotating jaw 52 clamps the piston pin 3. The drive member 42 rotates forward again, and the moving seat 2 drives the piston pin 3 to move. When the piston pin 3 passes the work box 8, the polishing motor is started. The polishing motor drives the polishing roller 81 to polish the surface of the piston pin 3. At the same time, under the action of the wave bracket 13 and the bottom rod 59, the lifting bracket 58 reciprocates, causing the rotating jaw 52 to drive the piston pin 3 to rotate, avoiding polishing dead angles.

[0046] After polishing, the moving seat 2 reaches the end of its movement range closest to the unloading rack 7. At this time, the unloading auxiliary key 47 corresponds to the unloading keyway, the second spring is compressed, the first spring is compressed, the clamping gear 51 corresponds to the clearance space, the driving component 42 reverses, causing the drive shaft 4 to drive the unloading auxiliary shaft 72 to rotate. Under the cooperation of the active rocker arm 74 and the driven rocker arm 77, the unloading pusher 76 pushes the piston pin 3 onto the inclined guide plate 71, and the piston pin 3 rolls onto the unloading rack 7.

[0047] This invention provides a polishing device for piston pin machining, which has the following advantages:

[0048] 1. By setting up polishing racks, loading racks, and unloading racks, the loading, polishing, and unloading of piston pins can be automatically realized, which improves the automation level and processing efficiency of the device, reduces the number of personnel required and labor intensity, and reduces labor costs.

[0049] 2. By setting up mechanisms such as rotating jaws, turntables, and eccentric rods, the piston pin can be clamped during the polishing process, improving the stability of the device, and the piston pin can be driven to rotate, avoiding polishing dead angles and ensuring good polishing results.

[0050] In summary, the beneficial effects of the present invention are: it can realize the automatic feeding, polishing and unloading of piston pins, improving the automation level and processing efficiency of the device, and can avoid polishing dead corners, ensuring good polishing effect.

[0051] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A polishing apparatus for processing piston pins, characterized in that, include: A polishing frame has an upper feed rack and an lower feed rack at both ends, and rotatable polishing rollers are provided on both sides of the middle part of the polishing frame; A movable base is slidably mounted on a polishing frame. A movable bushing and a clamping shaft are rotatably connected to the movable base. The movable bushing is fitted onto a fixed shaft, which is mounted on the polishing frame. Clamping plates are provided at both ends of the clamping shaft. A drive shaft is provided between the movable bushing and the clamping shaft. An installation bushing is elastically connected to the end of the drive shaft near the polishing frame. A main gear and a secondary gear are provided on the installation bushing. A movable gear is rotatably mounted on the movable bushing, and a clamping gear is rotatably mounted on the clamping shaft. A feeding rack is provided with a conveyor belt, and ratchet teeth are provided on the side walls of the conveyor belt. A feeding auxiliary shaft is rotatably provided on the feeding rack, and an auxiliary seat is provided on the feeding auxiliary shaft. An auxiliary pawl that cooperates with the ratchet teeth is rotatably provided on the auxiliary seat. The unloading rack has an inclined guide plate between it and the polishing rack. The polishing rack has a rotating unloading auxiliary shaft with an active swing rod on it. The polishing rack has a rotating limiting shaft with an unloading lever and a driven swing rod on it.

2. The polishing apparatus for piston pin machining according to claim 1, characterized in that, A positive ratchet is provided on one side wall of the moving gear, and a positive pawl is rotatably provided on the moving shaft sleeve. A negative ratchet is provided on one side wall of the clamping gear, and a negative pawl is rotatably provided on the clamping shaft.

3. The polishing apparatus for piston pin machining according to claim 1, characterized in that, The top surface of the movable seat is provided with several top support plates. The movable bushing and the clamping shaft are rotatably connected to the top support plates. The drive shaft passes through the top support plates. The movable seat is provided with a drive component. One of the top support plates is rotatably connected to a drive bushing that is slidably sleeved outside the drive shaft. The output shaft of the drive component is connected to the drive bushing via a belt drive.

4. The polishing apparatus for piston pin processing according to claim 3, characterized in that, A positioning disc is fixedly connected to the drive shaft. The positioning disc is located on one of the top support plates near the loading rack. A spring disc is rotatably mounted on the drive shaft. The spring disc is located on the top support plate away from the loading rack. A second spring is provided between the spring disc and the top support plate.

5. The polishing apparatus for piston pin machining according to claim 1, characterized in that, The feeding rack is rotatably equipped with a drive shaft, which is connected to the feeding auxiliary shaft by a belt drive. The drive shaft is equipped with a feeding auxiliary key, and the secondary gear is equipped with a feeding keyway. The end of the drive shaft away from the feeding rack is equipped with a discharging auxiliary key, and the discharging auxiliary shaft is equipped with an end plate with a discharging keyway.

6. The polishing apparatus for piston pin machining according to claim 1, characterized in that, Each clamping plate is rotatably equipped with a rotating jaw, each rotating jaw is equipped with a turntable, each turntable is equipped with an eccentric rod, each eccentric rod is rotatably connected to a rocker arm, the bottom end of each rocker arm is rotatably connected to a lifting seat, the bottom end of each lifting seat is equipped with an extension rod passing through a movable seat, the bottom end of each extension rod is equipped with a sliding sleeve, the sliding sleeve is slidably fitted onto the lifting bracket, the bottom end of the lifting bracket is equipped with a bottom rod, the polishing frame is equipped with a bottom bracket, and the bottom bracket is equipped with a wave bracket.

7. The polishing apparatus for piston pin machining according to claim 1, characterized in that, Two arc-shaped support plates are rotatably provided on one side of the feeding rack. The arc-shaped support plates are both located above the polishing rack. The arc-shaped support plates are rotatably connected to the feeding rack through a positioning shaft. Each positioning shaft is provided with a connecting piece. A sliding frame is slidably provided on the feeding rack. A connecting rope is provided between the sliding frame and the connecting piece.

8. The polishing apparatus for piston pin machining according to claim 7, characterized in that, The auxiliary seat is provided with a release seat on the side near the polishing frame. The release seat is slidably connected to the feeding frame, and a connecting rod is rotatably provided between the release seat and the sliding frame.

9. The polishing apparatus for piston pin machining according to claim 1, characterized in that, The top surface of the loading rack is positioned higher than the top surface of the polishing rack, while the top surface of the unloading rack is positioned lower than the top surface of the polishing rack.

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