Positioning clamp for piston pin machining

Abstract

The utility model discloses a positioning clamp for piston pin machining. The positioning clamp comprises a base, a side face clamping mechanism and a height fixing mechanism. Mounting holes which are uniformly distributed are formed in the left side and the right side of the upper surface of the base; the side face clamping mechanism is arranged on the upper surface of the base; the height fixing mechanism comprises a second pulling seat, a rotating shaft, a positioning seat and sliding columns, the sliding columns which are symmetrically distributed left and right are fixedly connected to the middle of the base, the positioning seat is slidably connected between the two sliding columns, the rotating shaft is connected between the upper ends of the two sliding columns through bolts, and the second pulling seat is rotatably connected to the middle of the rotating shaft; and the height fixing mechanism further comprises second springs, the outer portions of the sliding columns are sleeved with the second springs, the second springs are fixedly connected between the upper surface of the base and the lower surface of the positioning seat, and the positioning clamp for piston pin machining can rapidly position and clamp the position and height of a piston pin.

Description

Technical Field

[0001] The utility model relates to the technical field of piston pin processing, in particular to a positioning fixture for piston pin processing. Background Art

[0002] The piston pin is a cylindrical pin installed on the piston skirt. Its middle part passes through the small end hole of the connecting rod and 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. In order to reduce weight, the piston pin is generally made of high-quality alloy steel and made hollow.

[0003] The piston pin generally needs to go through a drilling process. Before drilling, the piston pin is positioned and clamped. The existing piston pin positioning fixture can only position and clamp the outer arc surface of the piston pin. There may be a gap between the lower end of the piston pin and the upper surface of the fixture base, resulting in a slight deviation in the drilling position. For this reason, we propose a positioning fixture for piston pin processing. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a positioning fixture for piston pin processing, which can quickly position and clamp the position and height of the piston pin, and can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a positioning fixture for piston pin processing, comprising a base, a side clamping mechanism and a height fixing mechanism;

[0006] Base: Evenly distributed mounting holes are provided on both sides of the upper surface;

[0007] Side clamping mechanism: it is arranged on the upper surface of the base;

[0008] Height fixing mechanism: It includes a second pull seat, a rotating shaft, a positioning seat and a sliding column. The middle part of the base is fixedly connected with sliding columns symmetrically distributed on the left and right. The positioning seat is slidably connected between the two sliding columns. The upper ends of the two sliding columns are connected with a rotating shaft by bolts. The middle part of the rotating shaft is rotatably connected with the pull seat second. The pull seat second is located at the upper end of the positioning seat and can quickly position and clamp the position and height of the piston pin.

[0009] Furthermore, the height fixing mechanism also includes a second spring, and the outside of the sliding column is provided with a second spring, and the second spring is fixedly connected between the upper surface of the base and the lower surface of the positioning seat to prevent the second seat from being detached.

[0010] Furthermore, the side clamping mechanism includes a sliding seat, a slider, a fixed block and a clamping claw. The left and right sides of the upper surface of the base are connected to the sliding seat by bolts, and the inside of the sliding seat is fixed with evenly distributed round rods by bolts. The sliding seat is slidably connected between the round rods on the same side of the left and right sides, and the relative inner ends of the two sliding blocks are connected to the fixed blocks by bolts. The relative inner sides of the two fixed blocks are provided with clamping claws to achieve clamping of the piston pin.

[0011] Furthermore, the side clamping mechanism also includes a connecting rod, a sliding rod, a fixed seat and a pull seat. The upper surface of the sliding block is rotatably connected to the connecting rod via a pin shaft, the front side of the upper surface of the base is connected to the fixed seat via a bolt, the middle part of the fixed seat is slidably connected to the sliding rod, the front end of the connecting rod is rotatably connected to the rear end of the sliding rod via a pin shaft, the front end of the sliding rod is rotatably connected to a pull seat, and the pull seat is located on the front side of the fixed seat to achieve the approach of the two jaws.

[0012] Furthermore, the side clamping mechanism also includes a spring 1, a spring column is provided at the lower end of the rear side surface of the fixed seat, the spring column passes through the rear end of the sliding rod, and a spring 1 is provided on the outer sleeve of the spring column. The spring 1 is fixedly connected between the rear end of the sliding rod and the rear side surface of the fixed seat to prevent the pull seat 1 from detaching.

[0013] Furthermore, a rubber seat is inserted in the middle of the base, and the rubber seat is located between the two clamping jaws. The rubber seat and the positioning seat correspond to each other in upper and lower positions, so as to realize the approximate positioning of the piston pin.

[0014] Furthermore, the first pull seat and the second pull seat are both rectangular pull seats, which are convenient for locking the piston pin.

[0015] Compared with the prior art, the beneficial effects of the utility model are: the positioning fixture for piston pin processing has the following advantages:

[0016] Insert the piston pin into the outside of the rubber seat, pull the pull seat 1 clockwise to make the short side of the pull seat 1 contact with the front side of the fixed seat, and the pull seat 1 pulls the slide bar to slide forward inside the fixed seat. The spring 1 is compressed, and the spring 1 pushes the slide bar to generate a reaction force of the pull seat 1 pulling the slide bar to prevent the short side of the pull seat 1 from separating from the front side of the fixed seat. The front ends of the connecting rods are pulled forward by the slide bars, and the rear ends of the connecting rods push the adjacent slide bars to the end close to the rubber seat respectively. The two clamping claws are close to the piston pin to realize the side of the piston pin. The first and second springs are compressed to produce a reaction force to prevent the short plate of the second pull seat from detaching from the upper surface of the positioning seat. The front side of the upper end of the positioning seat contacts the upper end of the piston pin and presses down the piston pin to avoid a gap between the lower surface of the piston pin and the base, thereby achieving height positioning. The position and height positioning of the piston pin can be quickly achieved by pulling the first and second pull seats. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model.

[0018] In the figure: 1 base, 2 side clamping mechanism, 21 sliding seat, 22 slider, 23 fixed block, 24 clamping claw, 25 connecting rod, 26 sliding rod, 27 spring 1, 28 fixed seat, 29 pull seat 1, 3 height fixing mechanism, 31 pull seat 2, 32 rotating shaft, 33 positioning seat, 34 sliding column, 35 spring 2, 4 rubber seat, 5 mounting hole. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figure 1 , This embodiment provides a technical solution: a positioning fixture for piston pin processing, comprising a base 1, a side clamping mechanism 2 and a height fixing mechanism 3;

[0021] Base 1: The left and right sides of the upper surface are provided with evenly distributed mounting holes 5;

[0022] The side clamping mechanism 2 is arranged on the upper surface of the base 1. The side clamping mechanism 2 includes a slide seat 21, a slider 22, a fixed block 23 and a clamping claw 24. The left and right sides of the upper surface of the base 1 are connected with the slide seat 21 by bolts. The inside of the slide seat 21 is fixed with evenly distributed round rods by bolts. The slide seat 22 is slidably connected between the round rods on the same side of the left and right. The opposite inner ends of the two slides 22 are connected with the fixed block 23 by bolts. The opposite inner sides of the two fixed blocks 23 are provided with a clamping claw 24. The side clamping mechanism 2 also includes a connecting rod 25, a slide rod 2 6. A fixed seat 28 and a pull seat 29. The upper surface of the slider 22 is rotatably connected to the connecting rod 25 through a pin shaft 1. The front side of the upper surface of the base 1 is connected to the fixed seat 28 through a bolt. The middle part of the fixed seat 28 is slidably connected to the slide bar 26. The front end of the connecting rod 25 is rotatably connected to the rear end of the slide bar 26 through a pin shaft 2. The front end of the slide bar 26 is rotatably connected to the pull seat 29. The pull seat 29 is located at the front side of the fixed seat 28. The side clamping mechanism 2 also includes a spring 27. The lower end of the rear side of the fixed seat 28 is provided with a spring column. The spring column passes through the slide At the rear end of the rod 26, a spring 27 is sleeved on the outside of the spring column. The spring 27 is fixedly connected between the rear end of the slide rod 26 and the rear side of the fixed seat 28. A rubber seat 4 is inserted in the middle of the base 1. The rubber seat 4 is located between the two clamping claws 24. The rubber seat 4 and the positioning seat 33 correspond to each other in the upper and lower positions. The pull seat 1 29 and the pull seat 2 31 are both rectangular pull seats. The processing personnel install the positioning fixture on the upper surface of the workbench of the punching device through the mounting hole, and then insert the piston pin into the outside of the rubber seat 4, and pull the pull seat 1 29 clockwise to make the pull seat The short side of the seat 29 contacts the front side of the fixed seat 28, the seat 29 is pulled to pull the slide bar 26 to slide forward inside the fixed seat 28, the spring 27 is compressed, and the spring 27 pushes the slide bar 26 to generate a reaction force of the seat 29 pulling the slide bar 26 to prevent the short side of the seat 29 from being separated from the front side of the fixed seat 28. The front end of the connecting rod 25 is pulled forward by the slide bar 26, and the rear end of the connecting rod 25 pushes the adjacent slider 22 to the end close to the rubber seat 4 respectively, and the two clamping claws 24 are close to the piston pin to clamp the side of the piston pin.

[0023] Height fixing mechanism 3: It includes a pull seat 2 31, a rotating shaft 32, a positioning seat 33 and a sliding column 34. The middle part of the base 1 is fixedly connected with a sliding column 34 symmetrically distributed on the left and right. The positioning seat 33 is slidably connected between the two sliding columns 34. The upper ends of the two sliding columns 34 are connected by a rotating shaft 32 through bolts. The middle part of the rotating shaft 32 is rotatably connected with the pull seat 2 31. The pull seat 2 31 is located at the upper end of the positioning seat 33. The height fixing mechanism 3 also includes a spring 2 35. The outer side of the sliding column 34 is provided with a spring 2 35. The spring 2 35 is fixed The second spring 35 is connected between the upper surface of the base 1 and the lower surface of the positioning seat 33, and then the second moving seat 31 is pulled counterclockwise to make the short plate of the second moving seat 31 contact with the upper surface of the positioning seat 33, and the positioning seat 33 slides down between the two sliding columns 34. The second spring 35 is compressed and a reaction force is generated in the same way to prevent the short plate of the second moving seat 31 from detaching from the upper surface of the positioning seat 33. The front side of the upper end of the positioning seat 33 contacts the upper end of the piston pin and presses down the piston pin to avoid a gap between the lower surface of the piston pin and the base 1, thereby achieving height positioning and fixation.

[0024] The working principle of a positioning fixture for piston pin processing provided by the utility model is as follows: the processing personnel install the positioning fixture on the upper surface of the workbench of the punching device through the installation hole, and then plug the piston pin into the outside of the rubber seat 4, and pull the pull seat 29 clockwise to make the short side of the pull seat 29 contact the front side of the fixed seat 28, and the pull seat 29 pulls the slide bar 26 to slide forward inside the fixed seat 28, and the spring 27 is compressed, and the spring 27 pushes the slide bar 26 to generate a reaction force of the pull seat 29 pulling the slide bar 26 to prevent the short side of the pull seat 29 from separating from the front side of the fixed seat 28, and the front end of the connecting rod 25 is pulled by the slide bar 26 is pulled forward, and the rear end of the connecting rod 25 pushes the adjacent sliding blocks 22 toward one end close to the rubber seat 4. The two clamping claws 24 are close to the piston pin to clamp the side of the piston pin, and then the moving seat 21 is pulled counterclockwise to make the short plate of the moving seat 21 contact with the upper surface of the positioning seat 33, and the positioning seat 33 slides down between the two sliding columns 34. The springs 21 35 are compressed, and a reaction force is generated in the same way to prevent the short plate of the moving seat 21 from detaching from the upper surface of the positioning seat 33. The front side of the upper end of the positioning seat 33 contacts the upper end of the piston pin and presses down the piston pin to avoid a gap between the lower surface of the piston pin and the base 1, thereby achieving height positioning.

[0025] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A positioning fixture for piston pin processing, characterized in that: It comprises a base (1), a side clamping mechanism (2) and a height fixing mechanism (3); Base (1): The left and right sides of the upper surface of the base are provided with evenly distributed mounting holes (5); A side clamping mechanism (2): which is arranged on the upper surface of the base (1); The height fixing mechanism (3) comprises a second pull seat (31), a rotating shaft (32), a positioning seat (33) and a sliding column (34). The middle part of the base (1) is fixedly connected with sliding columns (34) symmetrically distributed on the left and right. The positioning seat (33) is slidably connected between the two sliding columns (34). The upper ends of the two sliding columns (34) are connected with a rotating shaft (32) by bolts. The middle part of the rotating shaft (32) is rotatably connected with the second pull seat (31). The second pull seat (31) is located at the upper end of the positioning seat (33).

2. A positioning fixture for piston pin processing according to claim 1, characterized in that: The height fixing mechanism (3) further comprises a second spring (35), the second spring (35) is sleeved on the outside of the slide column (34), and the second spring (35) is fixedly connected between the upper surface of the base (1) and the lower surface of the positioning seat (33).

3. A positioning fixture for piston pin processing according to claim 1, characterized in that: The side clamping mechanism (2) comprises a sliding seat (21), a slider (22), a fixed block (23) and a clamping claw (24); the sliding seats (21) are connected to the left and right sides of the upper surface of the base (1) by bolts; round rods evenly distributed are fixed inside the sliding seat (21) by bolts; the sliding seats (22) are slidably connected between the round rods on the same side; the opposite inner ends of the two sliding seats (22) are connected to the fixed blocks (23) by bolts; and the opposite inner sides of the two fixed blocks (23) are provided with clamping claws (24).

4. A positioning fixture for piston pin processing according to claim 3, characterized in that: The side clamping mechanism (2) also includes a connecting rod (25), a sliding rod (26), a fixed seat (28) and a pull seat (29). The upper surface of the slider (22) is rotatably connected to the connecting rod (25) via a pin shaft, the front side of the upper surface of the base (1) is connected to the fixed seat (28) via a bolt, the middle part of the fixed seat (28) is slidably connected to the sliding rod (26), the front end of the connecting rod (25) is rotatably connected to the rear end of the sliding rod (26) via a pin shaft, the front end of the sliding rod (26) is rotatably connected to the pull seat (29), and the pull seat (29) is located on the front side of the fixed seat (28).

5. A positioning fixture for piston pin processing according to claim 4, characterized in that: The side clamping mechanism (2) also includes a spring 1 (27). A spring column is provided at the lower end of the rear side surface of the fixing seat (28). The spring column passes through the rear end of the slide rod (26). The spring 1 (27) is sleeved on the outside of the spring column. The spring 1 (27) is fixedly connected between the rear end of the slide rod (26) and the rear side surface of the fixing seat (28).

6. A positioning fixture for piston pin processing according to claim 3, characterized in that: A rubber seat (4) is inserted in the middle of the base (1), the rubber seat (4) is located between the two clamping claws (24), and the rubber seat (4) and the positioning seat (33) correspond in upper and lower positions.

7. A positioning fixture for piston pin processing according to claim 4, characterized in that: The first pull seat (29) and the second pull seat (31) are both rectangular pull seats.

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