Positioning tool for quenching of tooth parts

Abstract

The utility model relates to the technical field of quenching processing positioning, in particular to a tooth part quenching positioning tool which comprises a fixing plate, a positioning boss is connected to the fixing plate, one side of the fixing plate is connected with a guide positioning device, and a tooth part is sleeved on the positioning boss. The guide positioning device comprises a positioning bolt, a guide block, a compression spring and a pull ring, one side of the fixing plate is in threaded connection with the guide block, one end of the positioning bolt is inserted into a tooth groove of the tooth part and meshed with a tooth root, the positioning bolt is sleeved with the compression spring, one end of the compression spring abuts against the positioning bolt, and the other end of the compression spring is inserted into the guide block; compared with the prior art, the positioning pin has the advantages that the gap between the positioning hole and the pin can be reduced, meanwhile, the pin is used for clamping the outer tooth part of the gear, and the notch of the tooth part is controlled to face a quenching inductor by adjusting the distance of the pull ring.

Description

Technical Field

[0001] The utility model relates to the technical field of quenching processing positioning, and particularly relates to a positioning tooling for quenching of gear parts. Background Art

[0002] Gear parts often need to be quenched in order to improve their wear resistance and service life. The existing quenching positioning tooling positions through an intermediate positioning hole and a single-tooth positioning pin. In order to facilitate the loading and unloading, there is a large gap left between the tooth root and the pin for positioning the part. Due to the high requirement for the uniformity of the quenching layer depth of the workpiece notch, a large tooling gap will cause the unevenness of the notch side wall, and usually it will become waste. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a positioning tooling for quenching of gear parts, which achieves a tight fit by adjusting the positioning pin and the tooth part of the part to be in close contact through a compression spring, and reduces the problem of uneven hardening layer depth caused by inaccurate positioning.

[0004] To achieve the above purpose, a positioning tooling for quenching of gear parts is designed, which includes a fixing plate and a positioning pin. A positioning boss is connected to the fixing plate, and a guiding and positioning device is connected to one side of the fixing plate. A gear part is sleeved on the positioning boss. The guiding and positioning device includes a positioning pin, a guiding block, a compression spring, and a pull ring. A guiding block is threadedly connected to one side of the fixing plate. One end of the positioning pin is inserted into the tooth groove of the gear part and meshes with the tooth root. A compression spring is sleeved on the positioning pin. One end of the compression spring abuts against the positioning pin, and the other end of the compression spring is inserted into the guiding block. The other end of the positioning pin passes through the guiding block and is threadedly connected with a fastening nut. Both sides of the fastening nut are respectively connected to both ends of the pull ring.

[0005] A positioning hole is provided in the fixing plate.

[0006] The positioning boss is a stepped bushing part with smaller diameters at both ends and a larger diameter in the middle, and a countersunk hole one is provided in the middle.

[0007] A countersunk hole two is provided at the bottom of the guiding block, and a threaded hole matching with the countersunk hole two is provided at the corresponding position of the fixing plate.

[0008] A guiding hole for the positioning pin to pass through is provided inside the guiding block.

[0009] One end of the positioning pin in contact with the tooth groove is provided with an arc structure, and the arc structure cooperates with the tooth groove of the gear part.

[0010] Compared with the prior art, the utility model can solve the problem of uneven quenching that may be caused by large tooling gaps in the processing of gear parts, can reduce the gap between the positioning hole and the pin, and at the same time, the pin clamps the outer teeth of the gear. By adjusting the distance of the pull ring, the notch of the gear part can be aligned with the quenching inductor, and it can also play a fixing role. Brief Description of the Drawings

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

[0012] Figure 2 It is a side view of the utility model.

[0013] Figure 3 It is a front view of the utility model.

[0014] Figure 4 It is a top view of the utility model.

[0015] Figure 5 It is a sectional view of the utility model.

[0016] See Figures 1 to 5 , 1 is a fixing plate, 2 is a positioning boss, 3 is a positioning pin, 4 is a guide block, 5 is a compression spring, 6 is a pull ring, 7 is a gear part, 8 is a fastening nut, 9 is a positioning hole, 10 is an arc structure, 11 is a guide hole, 12 is a threaded hole, 13 is a countersunk hole one, 14 is a tooth root, 15 is a countersunk hole two. Detailed Description of the Preferred Embodiments

[0017] The following further describes the utility model with reference to the drawings.

[0018] As Figure 1 shown, a positioning boss 2 is connected to the fixing plate 1, a guide positioning device is connected to one side of the fixing plate 1, a gear part 7 is sleeved on the positioning boss 2. The guide positioning device includes a positioning pin 3, a guide block 4, a compression spring 5, and a pull ring 6. A guide block 4 is threadedly connected to one side of the fixing plate 1. One end of the positioning pin 3 is inserted into the tooth groove of the gear part 7 and meshed with the tooth root 14. A compression spring 5 is sleeved on the positioning pin 3. One end of the compression spring 5 abuts against the positioning pin 3, and the other end of the compression spring 5 is inserted into the guide block 4. The connection mode of the positioning pin 3 and the compression spring 5 enables the positioning pin 3 to be closely attached to the gear part 7, avoiding the problem of a large distance between the positioning part and the tooth root 14 of the gear part 7. The other end of the positioning pin 3 passes through the guide block 4 and is threadedly connected to a fastening nut 8. Both sides of the fastening nut 8 are respectively connected to both ends of the pull ring 6. By the pull ring 6, the positioning pin 3 can be controlled to approach and move away from the tooth root 14 of the gear part 7, so as to realize the positioning and adjustment of the gear part 7.

[0019] The fixing plate 1 is provided with a positioning hole 9, which is used to provide a position reference when installing the positioning boss 2 to ensure that the positioning pin 3 can press the tooth-like part 7.

[0020] The structure of the positioning boss 2 is a stepped shaft part with smaller diameters at both ends and a larger diameter in the middle. A counterbore 13 is provided in the middle. The positioning boss 2 can be installed by welding or threaded connection. When installing the positioning boss 2, the counterbore 13 and the positioning hole 9 need to be concentrically aligned.

[0021] The bottom of the guide block 4 is provided with a counterbore 15, and the fixing plate 1 is provided with a threaded hole 12 corresponding to the position of the counterbore 15. The guide block 4 is fixed to one side of the fixing plate 1 by threaded connection.

[0022] The guide block 4 is internally provided with a guide hole 11 for the positioning pin 3 to pass through. The guide hole 11 restricts the left and right displacement of the positioning pin 3, plays a guiding role, and realizes the directional telescopic function of the positioning pin 3.

[0023] One end of the positioning pin 3 in contact with the tooth groove is provided with an arc structure 10. The arc structure 10 cooperates with the tooth root 14 of the tooth-like part 7, and the arc structure 10 and the tooth groove of the tooth-like part 7 cooperate to play a fixing role.

[0024] The specific implementation process of the present utility model is as follows. First, install the positioning boss 2, keep the counterbore 13 of the positioning boss 2 concentric with the positioning hole 9, and install the positioning boss 2 by welding or threaded connection. The compression spring 5 is sleeved on the thinner end of the positioning pin 3, and the thinner end of the positioning pin 3 passes through the guide block 4 and is connected with a fastening nut 8. The guide block 4 is fixed to one side of the fixing plate 1 by screws. The distance between the positioning pin 3 and the tooth-like part 7 is controlled by the pull ring 6. First, pull the pull ring 6 to create enough space to sleeve the tooth-like part 7 on the positioning boss 2, then release the pull ring 6, and the compression spring 5 rebounds. The arc structure 10 of the positioning pin 3 fits with the tooth groove of the tooth-like part 7, and the tooth-like part 7 can be positioned. It is necessary to ensure that there is a situation where the arc structure 10 of the positioning pin 3 should fit tightly with the tooth-like part 7 between the two extreme positions of pulling out and pushing in the pull ring 6.

[0025] When the tooth-like part 7 needs to be quenched, first pull the pull ring 6 backward to adjust the tooth-like part 7, align the groove opening to be processed of the tooth-like part 7 with the quenching inductor. After adjustment, then release the pull ring 6, and the compression spring 5 rebounds. The arc structure 10 of the positioning pin 3 abuts against the tooth root 14 of the tooth-like part 7 until the quenching is completed. After the quenching is finished, pull out the pull ring 6, the arc structure 10 of the positioning pin 3 is separated from the tooth-like part 7, and the tooth-like part 7 is removed to complete the tooth quenching process.

Claims

1. A positioning tool for quenching gear parts, comprising a fixing plate and a positioning pin, characterized in that: The fixing plate (1) is connected to a positioning boss (2), one side of the fixing plate (1) is connected to a guide positioning device, the positioning boss (2) is sleeved with a toothed part (7), the guide positioning device comprises a positioning pin (3), a guide block (4), a compression spring (5), and a pull ring (6), one side of the fixing plate (1) is threadedly connected with the guide block (4), one end of the positioning pin (3) is inserted into the tooth groove of the toothed part (7) and meshes with the tooth root (14), a compression spring (5) is sleeved on the positioning pin (3), one end of the compression spring (5) abuts against the positioning pin (3), the other end of the compression spring (5) is inserted into the guide block (4), the other end of the positioning pin (3) passes through the guide block (4) and is threadedly connected to a fastening nut (8), and the left and right sides of the fastening nut (8) are respectively connected to the two ends of the pull ring (6).

2. A positioning tool for quenching gear parts according to claim 1, characterized in that: The fixing plate (1) is provided with a positioning hole (9).

3. The positioning tool for quenching gear parts according to claim 1, characterized in that: The positioning boss (2) is a stepped shaft part with small ends and a large middle, and a countersunk hole (13) is provided in the middle.

4. The positioning tool for quenching gear parts according to claim 1, characterized in that: The bottom of the guide block (4) is provided with a second countersunk hole (15), and a threaded hole (12) matching the second countersunk hole (15) is provided at a corresponding position of the fixing plate (1).

5. The positioning tool for quenching gear parts according to claim 1, characterized in that: The guide block (4) is provided with a guide hole (11) inside for the positioning pin (3) to pass through.

6. The positioning tool for quenching gear parts according to claim 1, characterized in that: The end of the positioning pin (3) that contacts the tooth groove is provided with an arc structure (10), and the arc structure (10) cooperates with the tooth groove of the tooth part (7).

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