Positioning tool for uniform quenching of eccentric shaft cam

Abstract

The utility model relates to the technical field of quenching processing positioning tools, in particular to a positioning tool for uniform quenching of an eccentric shaft cam, which is characterized in that an eccentric positioning sleeve is sleeved below the eccentric shaft cam, a fixing groove is arranged on the side surface of the eccentric positioning sleeve, a semicircular enclasping ring is arranged above the fixing groove, a guide block is embedded in the fixing groove, and two gaskets are arranged at the top end of the guide block. The upper portion of the gasket is connected with an alignment plate, the lower surface of the alignment plate is connected with two guide rods, the guide rods penetrate through the gasket and the guide block to be connected with the gasket, the outer side of the guide rod below the guide block is sleeved with a spring, one end of the spring abuts against the gasket, and the other end of the spring abuts against the guide block. The problem that a hardened layer is not uniform due to eccentricity when the eccentric shaft cam is quenched is solved, the aligning plate is taken as a reference, the eccentric wheel is aligned with the aligning plate, namely the eccentric wheel is aligned with the main shaft, the eccentric positioning sleeve is further provided with the semicircular enclasping ring to solve the problems that the eccentric shaft cam is dislocated, swings and is not concentric, and the two eccentric wheels are quenched separately.

Description

Technical Field

[0001] The utility model relates to the technical field of quenching processing positioning tooling, in particular to a positioning tooling for uniform quenching of eccentric shaft cams. Background Art

[0002] There is an eccentricity between the eccentric wheels on the eccentric shaft and the shaft necks at both ends. When rotating with the shaft necks at both ends as the positioning, it is not concentric. Conventional vertical machine tool surface induction quenching will cause uneven hardening layer depth and cannot meet the technical requirements of parts. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a positioning tooling for uniform quenching of eccentric shaft cams. The eccentric positioning sleeve ensures the concentricity between the eccentric wheel and the machine tool spindle. The alignment plate provides a reference for the eccentric wheel, so that the eccentric wheel coincides with the arc surface of the alignment plate. At the same time, the semi-circular ring clamping ring prevents the relative sliding between the eccentric shaft and the positioning sleeve during rotation.

[0004] To achieve the above object, a positioning tooling for uniform quenching of eccentric shaft cams is designed, including an eccentric shaft cam. An eccentric positioning sleeve is sleeved below the eccentric shaft cam. A fixing groove is provided on the side of the eccentric positioning sleeve. A semi-circular clamping ring is provided above the fixing groove. A guiding block is embedded in the fixing groove. Two washers are provided at the top of the guiding block. The alignment plate is connected above the washers. Two guiding rods are connected to the lower surface of the alignment plate. The guiding rods respectively pass through the washers and the guiding block and are connected to a gasket. A spring is sleeved outside the guiding rod below the guiding block. One end of the spring abuts against the gasket, and the other end of the spring abuts against the guiding block.

[0005] The side of the alignment plate is provided with an arc structure.

[0006] The arc structure is concentric with the machine tool spindle.

[0007] The semi-circular clamping ring is fixed on the eccentric positioning sleeve through a locking screw.

[0008] The fixing groove is provided with a positioning hole.

[0009] The guiding block is provided with a fixing hole matching the positioning hole.

[0010] Compared with the prior art, the utility model solves the problem of uneven hardening layer caused by eccentricity during quenching of eccentric shaft cams. With the alignment plate as a reference, the eccentric wheel is aligned with the alignment plate, that is, aligned with the spindle. A semi-circular ring clamping ring is also provided on the eccentric positioning sleeve to solve the problem of eccentric shaft cam misalignment and non-concentricity. The two eccentric wheels are quenched separately. After quenching, the eccentric wheel is flipped 180°. The eccentric shaft on the other side is fixed in the eccentric positioning sleeve again, and then quenched again after fixing. Brief Description of the Drawings

[0011] Figure 1 This is a schematic structural diagram of the present utility model.

[0012] Figure 2 This is a top view of the present utility model.

[0013] Figure 3 This is a side view of the present utility model.

[0014] Figure 4 This is a schematic diagram of the coincidence of the alignment plate and the eccentric shaft.

[0015] Figure 5 This is an overall view of the present utility model from a top-down perspective.

[0016] Figure 6 This is a schematic diagram of the eccentric positioning sleeve.

[0017] Figure 7 This is a side view of the eccentric positioning sleeve.

[0018] Refer to Figures 1 to 7 , 1 is the eccentric positioning sleeve, 2 is the guide block, 3 is the guide rod, 4 is the alignment plate, 5 is the washer, 6 is the spacer, 7 is the spring, 8 is the eccentric shaft cam, 9 is the semi-circular clamping ring, 10 is the locking screw, 11 is the fixing groove, 12 is the positioning hole, 13 is the fixing hole, 14 is the arc structure. Detailed implementation manner

[0019] The following further describes the present utility model with reference to the accompanying drawings.

[0020] As Figure 1 shown, an eccentric positioning sleeve 1 is sleeved below the eccentric shaft cam 8. The eccentric positioning sleeve 1 is of a hollow barrel-like structure, and the accommodation space in the sleeve depends on the cylindrical diameter of the connecting shafts at both ends of the eccentric shaft cam 8. As Figure 6 , 7 shown, a fixing groove 11 is provided on the side surface of the eccentric positioning sleeve 1, a semi-circular clamping ring 9 is provided above the fixing groove 11, a guide block 2 is embedded in the fixing groove 11, two washers 5 are provided at the top end of the guide block 2, the alignment plate 4 is connected above the washers 5, two guide rods 3 are connected to the lower surface of the alignment plate 4, the guide rods 3 pass through the washers 5 and the guide block 2 respectively and are connected to the spacer 6, and a spring 7 is sleeved outside the guide rod 3 below the guide block 2. One end of the spring 7 abuts against the spacer 6, and the other end of the spring 7 abuts against the guide block 2. The spring 7 is responsible for the reset after the guide rod 3 contracts.

[0021] An arc structure 14 is provided on the side surface of the alignment plate 4.

[0022] The arc structure 14 is concentric with the machine tool spindle. The arc structure 14 of the alignment plate 4 is used for the reference of the eccentric shaft cam 8, so that the eccentric shaft cam 8 coincides with the arc structure 14, which can ensure that the eccentric shaft cam 8 is concentric with the machine tool spindle.

[0023] The semi-circular clamping ring 9 is fixed on the eccentric positioning sleeve 1 by the locking screw 10. The semi-circular clamping ring 9 plays a role in further fixing the eccentric shaft cam 8, preventing the eccentric shaft cam 8 from rotating and misaligning during the quenching process, which may lead to the problem that the eccentric shaft cam 8 is no longer concentric with the machine tool spindle.

[0024] The fixing groove 11 is provided with a positioning hole 12.

[0025] The guiding block 2 is provided with a fixing hole 13 which cooperates with the positioning hole 12. The positioning hole 12 and the fixing hole 13 play a role in positioning the installation of the guiding block 2. The guiding block 2 is fixed on the eccentric positioning sleeve 1 by screws passing through the positioning hole 12 and the fixing hole 13.

[0026] The implementation method of the present utility model is as follows. The common eccentric shaft cam 8 includes two eccentric wheels and an eccentric shaft. One end of the eccentric shaft of the eccentric shaft cam 8 is placed into the eccentric positioning sleeve 1, as Figure 4 shown. Lift the alignment plate 4 to the height of the lower eccentric shaft cam 8. At this time, the alignment plate 4 drives the guiding rod 3 to rise, and the spring 7 is tightened. Adjust the rotation of the eccentric shaft cam 8 to make the eccentric shaft cam 8 coincide with the arc surface of the alignment plate 4 to ensure that the eccentric shaft cam 8 is concentric with the machine tool spindle. After the adjustment is completed, fix the semi-circular clamping ring 9 on the eccentric positioning sleeve 1 by the locking screw 10 to prevent the eccentric shaft cam 8 from shifting due to shaking. Loosen the alignment plate 4, the spring 7 rebounds, and the guiding rod 3 returns to its original position. After the eccentric shaft 8 is completely fixed, quench the upper eccentric wheel of the eccentric shaft cam 8. After one end of the eccentric shaft cam 8 is quenched, loosen the locking screw 10, turn over the eccentric shaft cam 8, and place the eccentric shaft at the other end of the eccentric shaft cam 8 into the eccentric positioning sleeve 1. Repeat the above process to fix the eccentric shaft cam 8 again and align it with the machine tool spindle, and then the quenching work of the eccentric shaft cam 8 can be completed.

Claims

1. A positioning tool for uniform quenching of an eccentric shaft cam, comprising an eccentric shaft cam, characterized in that: An eccentric positioning sleeve (1) is sleeved below the eccentric shaft cam (8), a fixing groove (11) is provided on the side of the eccentric positioning sleeve (1), a semicircular clamping ring (9) is provided above the fixing groove (11), a guide block (2) is embedded in the fixing groove (11), two washers (5) are provided at the top of the guide block (2), an alignment plate (4) is connected to the top of the washers (5), two guide rods (3) are connected to the lower surface of the alignment plate (4), the guide rods (3) respectively pass through the washers (5) and the guide block (2) and are connected to the gasket (6), a spring (7) is sleeved on the outer side of the guide rod (3) below the guide block (2), one end of the spring (7) abuts against the gasket (6), and the other end of the spring (7) abuts against the guide block (2).

2. The positioning fixture for uniform quenching of an eccentric shaft cam according to claim 1, characterized in that: The side surface of the alignment plate (4) is provided with an arc structure (14).

3. The positioning fixture for uniform quenching of an eccentric shaft cam according to claim 2, characterized in that: The arc structure (14) is concentric with the main axis of the machine tool.

4. The positioning fixture for uniform quenching of an eccentric shaft cam according to claim 1, characterized in that: The semicircular clamping ring (9) is fixed on the eccentric positioning sleeve (1) via a locking screw (10).

5. The positioning fixture for uniform quenching of an eccentric shaft cam according to claim 1, characterized in that: A positioning hole (12) is provided in the fixing groove (11).

6. The positioning fixture for uniform quenching of an eccentric shaft cam according to claim 1, characterized in that: The guide block (2) is provided with a fixing hole (13) that matches the positioning hole (12).

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