Polishing and grinding tool for piston pin

Abstract

The utility model relates to the technical field of polishing equipment, in particular to a piston pin polishing and grinding tool which comprises a fixing frame. A grinding part is arranged on the rear side of the transverse base and comprises a support capable of moving horizontally, a detachable movable base is installed at an opening of the support, and a second electric cylinder used for driving the support to move horizontally is installed at the rear end of the fixed frame; a plurality of detachable polishing blocks used for polishing the piston pin are installed on the front end face of the movable base. Through the arrangement of the first rotating shaft and the second rotating shaft, the multiple piston pins can be clamped and fixed at the same time, the multiple piston pins can be driven to synchronously rotate at the same time through rotation of the second rotating shaft, and when the rotating piston pins make contact with a grinding block, the multiple piston pins can be ground at the same time; by means of the design, the polishing operation of a plurality of piston pins can be achieved at the same time, the polishing efficiency of the piston pins is improved, and the overall machining speed of the piston pins is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of polishing equipment, in particular to a polishing and grinding tool for a piston pin. Background Art

[0002] The piston pin is an important component in the engine. It is a cylindrical pin installed on the piston skirt. The middle part passes through the small end hole of the connecting rod. It is used to connect the piston and the connecting rod. Its function is to transmit the gas force borne by the piston to the connecting rod, or to make the small end of the connecting rod drive the piston to move together. At present, in the processing of the piston pin, the outer wall of the piston pin needs to be polished.

[0003] The utility model patent with authorization announcement number CN218397289U discloses a piston pin grinding device for mechanical processing, which includes a workbench, a fixed plate fixedly connected to the top left side of the workbench, and a controller is provided on the left wall of the fixed plate, a hydraulic cylinder is fixedly connected to the front and rear of the fixed plate, and a support frame is provided on the hydraulic cylinder, a motor is fixedly connected to the top of the support frame, and a rotating shaft on the motor movably passes through the support frame, a turntable is fixedly connected to the bottom of the turntable, and a positioning sleeve is fixedly connected to the bottom of the turntable, a piston pin is inserted into the inside of the positioning sleeve, a first screw is inserted into the inside of the piston pin, and the first screw is threadedly connected to the inside of the positioning sleeve, the bottom end of the first screw is fixedly connected to a limiting disk, and the limiting disk is attached to the bottom of the piston pin, and a grinding mechanism is provided inside the workbench. In the utility model, a hydraulic cylinder is fixedly connected to the front and rear of the interior of the fixed plate, so that the height of the support frame can be adjusted by the hydraulic cylinder. A motor is fixedly connected to the support frame, so that the rotating shaft and the turntable can be driven to rotate by the motor. A positioning sleeve is fixedly connected to the bottom of the turntable, so that the piston pin can be inserted into the positioning sleeve, so that the position of the piston pin can be initially limited. A first screw is threadedly connected to the interior of the positioning sleeve, so that the piston pin can be better positioned in the positioning sleeve through the cooperation of the first screw and the limiting plate. At this time, the motor can better drive the piston pin to rotate.

[0004] Although the piston pin grinding device for machining facilitates better grinding of the piston pin by limiting the position of the piston pin, the device still has the following problems in actual use: when grinding the piston pin, the device can only grind a single piston pin at a time. This grinding method greatly limits the overall processing speed, especially when facing the working conditions where a large number of piston pins need to be polished. Its efficiency is obviously insufficient and cannot meet the urgent demand for high-efficiency grinding operations on the production line. In view of this, we propose a piston pin polishing and grinding tool. Utility Model Content

[0005] The utility model aims to provide a polishing and grinding tool for a piston pin to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A polishing tool for a piston pin comprises a fixing frame, the front end surface of the fixing frame is open, a horizontal seat is fixed to the inner bottom of the fixing frame, a plurality of first rotating shafts are rotatably mounted on the top of the horizontal seat, and a first boss is coaxially fixed on the first rotating shaft;

[0008] A clamping part is provided above the cross seat, and the clamping part includes a lifting connection frame, a plurality of second rotating shafts are rotatably installed at the bottom of the connection frame, and a second boss is connected with a coaxial key on the second rotating shaft; the first rotating shaft and the second rotating shaft are both provided with a piston pin, and the two ends of the piston pin are respectively pressed against the first boss and the second boss; a plurality of connecting shafts are rotatably installed in the opening of the connection frame, and a transmission assembly is provided between two adjacent connecting shafts; the transmission assembly includes two pulleys that are symmetrical and connected with the connecting shafts with coaxial keys, and a belt is sleeved between two adjacent pulleys; a motor for driving the connecting shaft to rotate is installed on the top of the connection frame; two first electric cylinders for driving the connection frame to lift are also installed on the top of the fixed frame;

[0009] A grinding part is provided on the rear side of the horizontal seat, which includes a horizontally movable bracket, a detachable movable seat is installed at the opening of the bracket, and a second electric cylinder for driving the bracket to move horizontally is installed at the rear end of the fixed frame; a plurality of detachable grinding blocks for grinding piston pins are installed on the front end surface of the movable seat.

[0010] Preferably, a plurality of limiting grooves are formed on the front end surface of the movable seat, a limiting block is installed above the rear end surface of the grinding block, and the limiting block is plugged into and matched with the limiting grooves.

[0011] Preferably, the front end surface of the movable seat is fixed with baffles on both sides of the limiting groove, two opposite end surfaces of the two baffles are fixed with guide rails, and both side walls of the grinding block are provided with guide grooves slidably connected to the guide rails.

[0012] Preferably, a connecting bolt is passed through the center of the rear end of the bracket, and the connecting bolt is fixedly connected to the movable seat.

[0013] Preferably, the overall shape of the bracket is U-shaped, and the opening size of the bracket is matched with the size of the movable seat.

[0014] Preferably, first guide rods are fixed at both ends of the top of the connecting frame, and the first guide rods pass through the fixing frame and are slidably connected to the fixing frame.

[0015] Preferably, second guide rods are fixed at both ends of the rear end surface of the bracket, and the second guide rods pass through the rear end of the fixing frame and are slidably connected to the fixing frame.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] By setting the first rotating shaft and the second rotating shaft, multiple piston pins can be clamped and fixed at the same time. By rotating the second rotating shaft, multiple piston pins can be driven to rotate synchronously at the same time. When the rotating piston pins contact the grinding block, multiple piston pins can be grinded at the same time. This design can realize the grinding operation of multiple piston pins at the same time, improve the polishing efficiency of the piston pins, and increase the overall processing speed of the piston pins. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the horizontal seat in the utility model;

[0020] Figure 3 It is a structural schematic diagram of the clamping part in the utility model;

[0021] Figure 4 It is a partial structural schematic diagram of the clamping part in the utility model;

[0022] Figure 5 It is a structural schematic diagram of the grinding part in the utility model;

[0023] Figure 6 It is a schematic diagram of the explosion structure of the grinding part in the utility model.

[0024] In the figure:

[0025] 1. fixed frame; 10. horizontal seat; 11. first rotating shaft; 111. first boss;

[0026] 2. Clamping part; 20. Connecting frame; 21. Second rotating shaft; 211. Second boss; 22. Connecting shaft; 23. Pulley; 24. Belt; 25. First electric cylinder; 26. First guide rod; 27. Motor;

[0027] 3. Grinding part; 30. Bracket; 31. Connecting bolt; 32. Movable seat; 321. Stop bar; 322. Limiting groove; 323. Guide rail; 33. Second guide rod; 34. Second electric cylinder; 35. Grinding block; 351. Guide groove; 352. Limiting block;

[0028] 4. Piston pin. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] This embodiment provides a technical solution:

[0031] See also Figure 1-Figure 6 As shown, a piston pin polishing and grinding tool comprises a fixing frame 1: the front end surface of the fixing frame 1 is open, a horizontal seat 10 is fixed to the inner bottom of the fixing frame 1, a plurality of first rotating shafts 11 are rotatably mounted on the top of the horizontal seat 10, and a first boss 111 is coaxially fixed on the first rotating shaft 11; a clamping part 2 is arranged above the horizontal seat 10, and the clamping part 2 comprises a liftable connecting frame 20, a plurality of second rotating shafts 21 are rotatably mounted on the bottom of the connecting frame 20, and a second boss 211 is coaxially keyed on the second rotating shaft 21; both the first rotating shaft 11 and the second rotating shaft 21 are provided with a piston pin 4, and the two ends of the piston pin 4 are respectively pressed against the first boss 111 and the second boss 211; a plurality of connecting shafts 22 are rotatably mounted in the opening of the connecting frame 20, and two adjacent connecting shafts 22 are coaxially keyed to the first boss 111 and the second boss 211; Transmission components are provided between the connecting shafts 22; the transmission components include two pulleys 23 that are symmetrical and coaxially keyed to the connecting shafts 22, and a belt 24 is sleeved between the two adjacent pulleys 23; a motor 27 for driving the connecting shaft 22 to rotate is installed on the top of the connecting frame 20; two first electric cylinders 25 for driving the connecting frame 20 to rise and fall are also installed on the top of the fixed frame 1; a grinding part 3 is provided on the rear side of the cross seat 10, and the grinding part 3 includes a horizontally movable bracket 30, a detachable movable seat 32 is installed at the opening of the bracket 30, and a second electric cylinder 34 for driving the bracket 30 to move horizontally is installed at the rear end of the fixed frame 1; a plurality of detachable grinding blocks 35 for grinding the piston pin 4 are installed on the front end surface of the movable seat 32.

[0032] In this embodiment, a plurality of limit grooves 322 are formed on the front end surface of the movable seat 32, and a limit block 352 is installed above the rear end surface of the grinding block 35, and the limit block 352 is plugged into and matched with the limit groove 322. The cross-sectional shape of the limit block 352 and the limit groove 322 is trapezoidal, which is conducive to the stable connection between the movable seat 32 and the movable seat 32, and is convenient for disassembly, and then it is convenient to replace the worn grinding block 35 later.

[0033] In this embodiment, the front end surface of the movable seat 32 is located at both sides of the limiting groove 322 and is fixed with a stop bar 321, and two opposite end surfaces of the two stop bars 321 are fixed with a guide rail 323, and the two side walls of the grinding block 35 are provided with a guide groove 351 that is slidably connected to the guide rail 323. The provision of the guide rail 323 and the guide groove 351 improves the connection stability between the movable seat 32 and the grinding block 35.

[0034] In this embodiment, a connecting bolt 31 is provided at the center of the rear end of the bracket 30, and the connecting bolt 31 is fixedly connected to the movable seat 32. The fixing method of the connecting bolt 31 is simple and firm, which can ensure a firm connection between the movable seat 32 and the bracket 30, and prevent accidents caused by looseness during the grinding process. At the same time, this connection method is also convenient for disassembling the movable seat 32, and then facilitating the disassembly of the grinding block 35.

[0035] In this embodiment, the overall shape of the bracket 30 is U-shaped, and the opening size of the bracket 30 is adapted to the size of the movable seat 32. The U-shaped bracket 30 can better adapt to the size of the movable seat 32, ensuring that the movable seat 32 can be stably installed in the bracket 30, and at the same time, the limit block in the limit groove 322 is inserted under the limit of the bracket 30.

[0036] In this embodiment, first guide rods 26 are fixed at both ends of the top of the connecting frame 20, and the first guide rods 26 pass through the fixing frame 1 and are slidably connected to the fixing frame 1. The sliding connection between the first guide rods 26 and the fixing frame 1 provides a stable moving track for the connecting frame 20, ensuring the stability of the connecting frame 20.

[0037] In this embodiment, second guide rods 33 are fixed at both ends of the rear end surface of the bracket 30, and the second guide rods 33 pass through the rear end of the fixing frame 1 and are slidably connected to the fixing frame 1. The second guide rods 33 guide the horizontal movement of the bracket 30 and ensure the stability of the bracket 30.

[0038] It should be added that the front end of the grinding block 35 in this embodiment is arc-shaped, and the arc-shaped design matches the shape of the cylindrical piston pin 4, so that the outer wall of the piston pin 4 can better contact with the grinding block 35 during grinding, which is conducive to better grinding and polishing effect.

[0039] Before specific use, the user first aligns the opening at the bottom of the piston pin 4 with the first rotating shaft 11 and inserts it, so that the bottom end of the piston pin 4 presses against the first boss 111, and repeats the above steps to sequentially install multiple piston pins 4. Then the user turns on the power of the first electric cylinder 25, and the first electric cylinder 25 starts to work. The piston rod of the first electric cylinder 25 extends and drives the connecting frame 20 to move downward. The connecting frame 20 simultaneously drives the second rotating shaft 21 to move downward, and the second rotating shaft 21 simultaneously passes through the top opening of the piston pin 4. When the second boss 211 presses against the piston pin 4, the power of the first electric cylinder 25 is stopped.

[0040] During specific use, the user first turns on the power of the motor 27, and the motor 27 starts to work. The output shaft of the motor 27 rotates to drive the connecting shaft 22 and the second rotating shaft 21 to rotate. Under the transmission of multiple pulleys 23 and belts 24, multiple second rotating shafts 21 rotate synchronously and drive the piston pin 4 to rotate. Then the user turns on the power of the second electric cylinder 34, and the piston rod of the second electric cylinder 34 extends to drive the bracket 30 to move forward. The bracket 30 drives multiple grinding blocks 35 to approach the piston pin 4. When the front end of the grinding block 35 is pressed against the piston pin 4, the piston pin 4 can be ground.

[0041] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A piston pin polishing and grinding tool, comprising a fixing frame (1), characterized in that: The front end surface of the fixing frame (1) is open, a horizontal seat (10) is fixed to the inner bottom of the fixing frame (1), a plurality of first rotating shafts (11) are rotatably mounted on the top of the horizontal seat (10), and a first boss (111) is coaxially fixed on the first rotating shaft (11); A clamping part (2) is provided above the horizontal seat (10), and the clamping part (2) includes a lifting connection frame (20), a plurality of second rotating shafts (21) are rotatably mounted at the bottom of the connection frame (20), and a second boss (211) is coaxially keyed on the second rotating shaft (21); both the first rotating shaft (11) and the second rotating shaft (21) are provided with a piston pin (4), and the two ends of the piston pin (4) are respectively pressed against the first boss (111) and the second boss (211); A plurality of connecting shafts (22) are provided, and a transmission assembly is provided between two adjacent connecting shafts (22); the transmission assembly comprises two belt pulleys (23) which are symmetrical and coaxially key-connected with the connecting shafts (22), and a belt (24) is sleeved between two adjacent belt pulleys (23); a motor (27) for driving the connecting shafts (22) to rotate is installed on the top of the connecting frame (20); and two first electric cylinders (25) for driving the connecting frame (20) to rise and fall are also installed on the top of the fixed frame (1); A grinding portion (3) is provided on the rear side of the horizontal seat (10), and the grinding portion (3) includes a bracket (30) that can move horizontally, a detachable movable seat (32) is installed at the opening of the bracket (30), and a second electric cylinder (34) for driving the bracket (30) to move horizontally is installed at the rear end of the fixed frame (1); and a plurality of detachable grinding blocks (35) for grinding the piston pin (4) are installed on the front end surface of the movable seat (32).

2. The piston pin polishing and grinding tool according to claim 1, characterized in that: The front end surface of the movable seat (32) is provided with a plurality of limit grooves (322), and a limit block (352) is installed above the rear end surface of the grinding block (35), and the limit block (352) is plugged into and matched with the limit groove (322).

3. The piston pin polishing and grinding tool according to claim 1, characterized in that: The front end surface of the movable seat (32) is located on both sides of the limiting groove (322) and is fixed with blocking bars (321), two opposite end surfaces of the two blocking bars (321) are fixed with guide rails (323), and the two side walls of the grinding block (35) are provided with guide grooves (351) slidably connected to the guide rails (323).

4. The piston pin polishing and grinding tool according to claim 1, characterized in that: A connecting bolt (31) is passed through the center of the rear end of the bracket (30), and the connecting bolt (31) is fixedly connected to the movable seat (32).

5. The piston pin polishing and grinding tool according to claim 1, characterized in that: The overall shape of the bracket (30) is U-shaped, and the opening size of the bracket (30) is matched with the size of the movable seat (32).

6. The piston pin polishing and grinding tool according to claim 1, characterized in that: First guide rods (26) are fixed at both ends of the top of the connecting frame (20), and the first guide rods (26) pass through the fixing frame (1) and are slidably connected to the fixing frame (1).

7. The piston pin polishing and grinding tool according to claim 1, characterized in that: Second guide rods (33) are fixed at both ends of the rear end surface of the bracket (30), and the second guide rods (33) pass through the rear end of the fixing frame (1) and are slidably connected to the fixing frame (1).

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