Quenching piston pin outer circle grinding tool

Abstract

The utility model relates to the field of cylindrical grinding tools, and discloses a quenching piston pin cylindrical grinding tool. Comprising a main body rod, a sleeve rod arranged outside the main body rod in a sleeving mode, a positioning ring installed outside the sleeve rod, a sleeve ring connected to the right side of the main body rod in a threaded mode and a fastening nut connected to the left side of the main body rod in a threaded mode and tightly attached to the positioning ring. The utility model has the following advantages and effects: the piston pin penetrates through the right side of the main body rod and then is sleeved on the sleeve rod, the positioning ring abuts against the left side of the piston pin, and the sleeve ring is in threaded connection with the left side of the main body rod, so that the sleeve ring moves close to the sleeve rod and initially abuts against the right side of the piston pin; when the piston pin is machined, the fastening nut moves close to the positioning ring, the main body rod reversely moves relative to the fastening nut, the positioning ring and the lantern ring are close to each other, the piston pin can be better fixed, and deviation in the machining process is avoided.

Description

Technical Field

[0001] This utility model relates to the field of external cylindrical grinding tooling technology, and in particular to an external cylindrical grinding tooling for quenched piston pins. Background Technology

[0002] A piston pin is a cylindrical pin installed on the piston skirt. Its middle part passes through the connecting rod small end hole and is used to connect the piston and the connecting rod. Its function is to transmit the gas force on the piston to the connecting rod, or to make the connecting rod small end drive the piston to move together.

[0003] During the processing of piston pins, the outer diameter of the through hole needs to be ground. During grinding, a tooling is needed to fix the piston pin. Existing tooling usually fixes the piston pin by directly tightening a nut on one side of the piston pin, which has poor fixing effect and is prone to deviation during processing. Therefore, we propose a tooling for grinding the outer diameter of quenched piston pins. Utility Model Content

[0004] The purpose of this invention is to provide a grinding fixture for the outer cylindrical surface of a quenched piston pin, which has a good fixing effect and can prevent deviations during the machining process.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a grinding fixture for the outer cylindrical surface of a quenched piston pin, comprising a main rod, a sleeve rod sleeved outside the main rod, a positioning ring installed outside the sleeve rod, a sleeve ring threaded to the right side of the main rod, and a fastening nut threaded to the left side of the main rod and tightly attached to the positioning ring.

[0006] By adopting the above technical solution, the piston pin passes through the right side of the main body rod and is then fitted onto the sleeve rod. The positioning ring abuts against the left side of the piston pin. The sleeve is then threaded onto the left side of the main body rod, moving it closer to the sleeve rod to initially abut against the right side of the piston pin. Then, the sleeve is held and the fastening nut is rotated, causing the fastening nut to move closer to the positioning ring. The main body rod moves in the opposite direction relative to the fastening nut, bringing the positioning ring and the sleeve closer together. This can better fix the piston pin and avoid deviations during processing.

[0007] A further feature of this invention is that the main rod extends through the sleeve rod, and both the outer wall of the main rod and the inner wall of the sleeve rod are designed to be smooth.

[0008] By adopting the above technical solution, it is beneficial to reduce the resistance encountered by the main rod when it moves, making its movement smoother.

[0009] A further feature of this invention is that positioning holes are provided on both the left and right sides of the main body rod.

[0010] By adopting the above technical solution, the positioning hole facilitates fixing the fixed piston pin on the center of the grinding machine and machining the piston pin.

[0011] A further feature of this invention is that the main rod has a hollow internal structure and end caps are connected to both the left and right sides of its inner wall.

[0012] A further feature of this invention is that the positioning hole is formed on the end cap.

[0013] By adopting the above technical solution, the hollow structure helps to reduce the overall weight of the main rod, making it easier to handle and saving resources. The end cap provides the main body for opening the positioning hole.

[0014] A further feature of this invention is that the diameter of the collar is equal to the diameter of the positioning ring.

[0015] By adopting the above technical solution, the collar and the positioning ring can be fixed to the piston pin from the left and right sides respectively.

[0016] A further feature of this invention is that a finger groove is provided on the outer side of the collar, and anti-slip particles are installed in the finger groove.

[0017] By adopting the above technical solution, the finger grooves and anti-slip particles can increase the frictional resistance between the hand and the collar, making it easier to hold the collar and then turn the tightening nut.

[0018] A further feature of this invention is that an auxiliary ring is installed on the outside of the sleeve rod, and the diameter of the auxiliary ring is smaller than the diameter of the positioning ring.

[0019] By adopting the above technical solution, the diameter of the auxiliary ring is smaller than that of the positioning ring, allowing the piston pin to pass through the auxiliary ring, thereby providing internal support for the piston pin and further improving the fixing effect of the piston pin.

[0020] A further feature of this invention is that a plurality of equally spaced rubber protrusions are installed on the outer side of the auxiliary ring.

[0021] By adopting the above technical solution, the rubber protrusion further improves the support effect of the auxiliary ring on the piston pin, making the support more stable.

[0022] A further feature of this invention is that the contact surface between the fastening nut and the positioning ring is designed to be smooth.

[0023] By adopting the above technical solution, it is beneficial to reduce the resistance encountered when the fastening nut moves close to the positioning ring, and facilitate the positioning ring and the collar to move closer to each other to fix the piston pin.

[0024] The beneficial effects of this utility model are as follows: the piston pin passes through the right side of the main body rod and is then fitted onto the sleeve rod. The positioning ring abuts against the left side of the piston pin. The sleeve is then threaded onto the left side of the main body rod, moving it closer to the sleeve rod to initially abut against the right side of the piston pin. Then, the sleeve is held and the fastening nut is rotated, causing the fastening nut to move closer to the positioning ring. The main body rod moves in the opposite direction relative to the fastening nut, causing the positioning ring and the sleeve to move closer to each other. This can better fix the piston pin and avoid deviations during processing. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This is a schematic cross-sectional view of the present invention;

[0028] Figure 3 This is a schematic diagram of the assembly of the utility model and the piston pin.

[0029] In the diagram, 1. Main rod; 2. Sleeve rod; 3. Positioning ring; 4. Sleeve ring; 5. Fastening nut; 6. Positioning hole; 7. Finger groove; 8. Auxiliary ring; 9. End cap; 10. Rubber protrusion; 11. Anti-slip particles. Detailed Implementation

[0030] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0031] Please see Figure 1-3 This utility model provides a grinding fixture for the outer cylindrical surface of a quenched piston pin, including a main rod 1, a sleeve rod 2 sleeved outside the main rod 1, a positioning ring 3 installed outside the sleeve rod 2, a collar 4 threaded to the right side of the main rod 1, and a fastening nut 5 threaded to the left side of the main rod 1 and tightly attached to the positioning ring 3.

[0032] The piston pin is passed through the right side of the main body rod 1 and then fitted onto the sleeve rod 2. The positioning ring 3 abuts against the left side of the piston pin. Then, the sleeve 4 is threaded onto the left side of the main body rod 1 and moved closer to the sleeve rod 2, initially abutting against the right side of the piston pin. Then, the sleeve 4 is held and the fastening nut 5 is rotated, causing the fastening nut 5 to move closer to the positioning ring 3. The main body rod 1 moves in the opposite direction relative to the fastening nut 5, so that the positioning ring 3 and the sleeve 4 move closer to each other, which can better fix the piston pin and avoid deviations during processing.

[0033] The main rod 1 passes through the sleeve rod 2. The outer wall of the main rod 1 and the inner wall of the sleeve rod 2 are both designed to be smooth, which helps to reduce the resistance encountered by the main rod 1 when it moves, making its movement smoother.

[0034] Positioning holes 6 are provided on both the left and right sides of the main body rod 1. The positioning holes 6 facilitate fixing the fixed piston pin on the center of the grinding machine and processing the piston pin.

[0035] The main body rod 1 has a hollow structure inside, and end caps 9 are connected to both the left and right sides of its inner wall. The positioning hole 6 is opened on the end cap 9. The hollow structure helps to reduce the overall weight of the main body rod 1, making it easier to pick up and saving resources. The end cap 9 provides the main body for opening the positioning hole 6.

[0036] The diameter of the collar 4 is equal to the diameter of the positioning ring 3, so that the collar 4 and the positioning ring 3 can abut against the piston pin from the left and right sides respectively to fix it.

[0037] The outer side of the collar 4 is provided with a finger groove 7, and anti-slip particles 11 are installed in the finger groove 7. The finger groove 7 and anti-slip particles 11 can increase the frictional resistance between the hand and the collar 4, making it easier to hold the collar 4 and then rotate the fastening nut 5.

[0038] An auxiliary ring 8 is also installed on the outside of the sleeve rod 2. The diameter of the auxiliary ring 8 is smaller than the diameter of the positioning ring 3. The smaller diameter of the auxiliary ring 8 compared to the positioning ring 3 allows the piston pin to pass through the auxiliary ring 2, thereby providing support for the piston pin from the inside and further improving the fixing effect of the piston pin.

[0039] The auxiliary ring 8 has several equally spaced rubber protrusions 10 installed on its outer side. The rubber protrusions 10 further improve the support effect of the auxiliary ring 8 on the piston pin, making the support more stable.

Claims

1. A grinding fixture for the outer cylindrical surface of a quenched piston pin, characterized in that, It includes a main rod (1), a sleeve rod (2) sleeved outside the main rod (1), a positioning ring (3) installed outside the sleeve rod (2), a collar (4) threaded to the right side of the main rod (1), and a fastening nut (5) threaded to the left side of the main rod (1) and close to the positioning ring (3).

2. The grinding fixture for the outer cylindrical surface of a quenched piston pin according to claim 1, characterized in that: The main rod (1) passes through the sleeve rod (2), and both the outer wall of the main rod (1) and the inner wall of the sleeve rod (2) are designed to be smooth.

3. The grinding fixture for the outer cylindrical surface of a quenched piston pin according to claim 2, characterized in that: Positioning holes (6) are provided on both the left and right sides of the main rod (1).

4. The grinding fixture for the outer cylindrical surface of a quenched piston pin according to claim 3, characterized in that: The main rod (1) has a hollow structure inside and end caps (9) are connected to both the left and right sides of its inner wall.

5. The grinding fixture for the outer cylindrical surface of a quenched piston pin according to claim 4, characterized in that: The positioning hole (6) is formed on the end cap (9).

6. The grinding fixture for the outer cylindrical surface of a quenched piston pin according to claim 5, characterized in that: The diameter of the collar (4) is equal to the diameter of the positioning ring (3).

7. The grinding fixture for the outer cylindrical surface of a quenched piston pin according to claim 6, characterized in that: The outer side of the collar (4) is provided with a finger groove (7), and anti-slip particles (11) are installed in the finger groove (7).

8. The grinding fixture for the outer cylindrical surface of a quenched piston pin according to claim 7, characterized in that: An auxiliary ring (8) is also installed on the outside of the sleeve (2), and the diameter of the auxiliary ring (8) is smaller than the diameter of the positioning ring (3).

9. A grinding fixture for the outer cylindrical surface of a quenched piston pin according to claim 8, characterized in that: The auxiliary ring (8) has several equally spaced rubber protrusions (10) installed on its outer side.

10. A grinding fixture for the outer cylindrical surface of a quenched piston pin according to claim 9, characterized in that: The contact surface between the fastening nut (5) and the positioning ring (3) is designed to be smooth.

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