Spiral bevel gear linear cutting key groove tooth aligning device

Abstract

The utility model discloses a spiral bevel gear linear cutting key groove tooth aligning device which comprises a base, and a base and a positioning column are connected to the base. A connecting rod is rotationally connected to one side of the base, a ball positioning pin is connected to the connecting rod, an elastic piece is connected between the connecting rod and the base, the elastic piece pulls the connecting rod to enable the ball positioning pin to approach the positioning column, a positioning groove is formed in the positioning column, and a long groove is formed in the base at the bottom of the positioning groove; the positioning groove is formed in the outer circle face of the side, away from the ball head positioning pin, of the positioning column, the positioning groove and the long groove are vertically aligned, and the width of the positioning groove is slightly larger than that of a key groove of the spiral bevel gear. Compared with the prior art, the device is simple in structure and convenient to use, through tooth alignment machining before heating and after heating, the accuracy and convenience of linear cutting, clamping and positioning are improved, and therefore it is guaranteed that the hardness of the two ends of a key groove is consistent with the depth of a carbonization layer, and the use requirement is met.

Description

Technical Field

[0001] This utility model relates to the field of gear-setting devices, and in particular to a gear-setting device for a spiral bevel gear with a wire-cut keyway. Background Technology

[0002] like Figure 1 As shown, this part is a typical driven bevel gear in an industrial reducer. To ensure the strength of the keyway, it is necessary to ensure the depth and hardness of the hardened layer. Therefore, before heat treatment, the keyway needs to be rough-machined by wire EDM, followed by a finish cut after heat treatment. The keyway of this spiral bevel gear is 22 (+0.033 / 0) wide and 85.4 (+0.2 / 0) deep. The technical requirements are a hardened layer depth of 0.8-1.0 and a surface hardness of not less than HRC59. Based on the heat treatment hardness variation table, the estimated finish cut allowance is no more than 0.2. The pre-heat-treated dimensions are: keyway width 21.7 (+0.05 / 0) and depth 85.2 (+0.2 / 0). Post-heat-treated dimensions require tool setting.

[0003] In existing technology, to process the keyway, the keyway is aligned with the mandrel keyway to ensure visual consistency before the molybdenum wire is threaded through the keyway hole and machining begins. However, visual alignment can lead to inconsistent depths on both sides of the keyway, resulting in one side meeting the tolerances while the other exceeds them. During use, the uneven stress on both sides of the keyway reduces its service life. Utility Model Content

[0004] The purpose of this invention is to provide a wire EDM keyway gear setting device for spiral bevel gears. It has a simple structure and is easy to use. By performing pre- and post-heat EDM gear setting, it improves the accuracy and convenience of wire EDM clamping and positioning, thereby ensuring that the hardness and carbonization layer depth at both ends of the keyway are consistent and meet the usage requirements, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A spiral bevel gear wire EDM keyway setting device includes a base, on which a base and a positioning post are connected; a connecting rod is rotatably connected to one side of the base, a ball-head positioning pin is connected to the connecting rod, and an elastic element is connected between the connecting rod and the base. The elastic element pulls the connecting rod to bring the ball-head positioning pin close to the positioning post. The positioning post is provided with a positioning groove, and the base at the bottom of the positioning groove is provided with a long groove.

[0007] A further improvement of this utility model is that the base includes a base plate, a U-shaped frame is connected to the base plate, an ear plate is connected to the U-shaped frame, and a connecting rod is rotatably connected to the ear plate through a pin.

[0008] A further improvement of this utility model is that a sleeve is connected to the connecting rod, and rings are connected to both the ear plate and the sleeve. The two ends of the elastic element are respectively connected to the two rings.

[0009] A further improvement of this utility model is that a rectangular block is connected to the bottom of the base plate, and the rectangular block is engaged in the long groove.

[0010] A further improvement of this utility model is that the ball-head locating pin is connected to the bottom of the connecting rod near the locating post, and the ball-head locating pin is vertically aligned with the long groove on the base.

[0011] A further improvement of this utility model is that a flange is provided at the bottom end of the positioning column, and the flange is connected to the base.

[0012] A further improvement of this utility model is that the positioning groove is set on the outer circular surface of the positioning post away from the ball head positioning pin, the positioning groove is aligned vertically with the long groove, and the width of the positioning groove is slightly larger than the width of the keyway of the spiral bevel gear.

[0013] A further improvement to this invention is that the elastic element is a tension spring.

[0014] The beneficial effects of this utility model are:

[0015] The spiral bevel gear wire EDM keyway tooth setting device of this utility model improves the accuracy and convenience of wire EDM clamping and positioning by performing tooth setting before and after heat treatment, thereby ensuring that the hardness and carbonization layer depth at both ends of the keyway are consistent and meet the usage requirements.

[0016] The spiral bevel gear wire cutting keyway tooth setting device of this utility model has an adjustable position on the connecting rod, thereby adjusting the tension of the tension spring as needed.

[0017] The spiral bevel gear wire cutting keyway tooth setting device of this utility model has a rectangular block connected to the bottom of the base plate. The rectangular block is locked in the long slot to ensure that the base position is not cheap and to improve the positioning accuracy of the ball head positioning pin. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the spiral bevel gear.

[0019] Figure 2 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 3 This is a partial structural schematic diagram of the present invention.

[0021] Figure 4 This is a schematic diagram of the positioning column structure of this utility model.

[0022] Figure 5This is a structural diagram of the present invention in use.

[0023] In the diagram: 1-base, 101-long groove, 2-base, 201-base plate, 202-U-shaped frame, 203-ear plate, 204-circular ring, 205-rectangular block, 3-positioning post, 301-positioning groove, 302-flange, 4-connecting rod, 5-ball head positioning pin, 6-elastic element, 7-clamp, 8-spiral bevel gear, 801-keyway. Detailed Implementation

[0024] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0025] Example 1: As Figures 1-4 As shown, a spiral bevel gear wire cutting keyway gear setting device includes a base 1, on which a base 2 and a positioning post 3 are connected; a connecting rod 4 is rotatably connected to one side of the base 2, and a ball-head positioning pin 5 is connected to the connecting rod 4. An elastic element 6 is connected between the connecting rod 4 and the base 2. The elastic element 6 pulls the connecting rod 4 so that the ball-head positioning pin 5 approaches the positioning post 3. The positioning post 3 is provided with a positioning groove 301, and the base 1 at the bottom of the positioning groove 301 is provided with a long groove 101.

[0026] The base 2 includes a base plate 201, a U-shaped frame 202 connected to the base plate 201, an ear plate 203 connected to the U-shaped frame 202, and a connecting rod 4 rotatably connected to the ear plate 203 via a pin.

[0027] Among them, the connecting rod 4 is connected to the sleeve 7, and the ear plate 203 and the sleeve 7 are both connected to the ring 204. The two ends of the elastic element 6 are respectively connected to the two rings 204.

[0028] The bottom of the base plate 201 is connected to a rectangular block 205, which is snapped into the long groove 101.

[0029] Among them, the ball-head positioning pin 5 is connected to the bottom of the connecting rod 4 near the positioning post 3, and the ball-head positioning pin 5 is vertically aligned with the long groove 101 on the base 1.

[0030] The bottom end of the positioning column 3 is provided with a flange 302, which is connected to the base 1.

[0031] The positioning groove 301 is located on the outer circular surface of the positioning post 3 away from the ball head positioning pin 5. The positioning groove 301 is aligned vertically with the long groove 101, and the width of the positioning groove 301 is slightly larger than the width of the keyway 801 of the spiral bevel gear 8.

[0032] Among them, elastic element 6 is a tension spring.

[0033] The specific working principle of this utility model is as follows:

[0034] like Figure 5 As shown, during operation, the base 1 is fixed to the worktable of the wire EDM machine. The spiral bevel gear 8 is inserted into the positioning pin 3. The connecting rod 4 is rotated until the ball head positioning pin 5 contacts the tooth groove of the spiral bevel gear 8. The spiral bevel gear 8 is then slightly rotated to adjust the relative position of the tooth groove and the ball head of the ball head positioning pin 5 until the ball head descends to the lowest point. The keyway 801 before heat treatment can then be machined. A 0.15mm allowance is reserved according to the process requirements. During post-heat treatment machining, the keyway 801 of the spiral bevel gear 8 is first visually aligned with the positioning groove 301 on the positioning pin 3. The positioning operation before heat treatment is then repeated. After the EDM ends, the connecting rod 4 is lifted to remove the spiral bevel gear 8, completing the machining.

[0035] It is worth noting that this device is not only suitable for wire cutting of keyways 801 for spiral bevel gears, but also for machining and positioning keyways 801 for other types of gears.

[0036] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent transformations or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A wire-cut keyway gear setting device for spiral bevel gears, characterized in that: Includes a base (1), on which a base (2) and a positioning post (3) are connected; a connecting rod (4) is rotatably connected to one side of the base (2), a ball-head positioning pin (5) is connected to the connecting rod (4), and an elastic element (6) is connected between the connecting rod (4) and the base (2). The elastic element (6) pulls the connecting rod (4) so ​​that the ball-head positioning pin (5) approaches the positioning post (3). The positioning post (3) is provided with a positioning groove (301), and the base (1) at the bottom of the positioning groove (301) is provided with a long groove (101).

2. The spiral bevel gear wire EDM keyway setting device as described in claim 1, characterized in that: The base (2) includes a base plate (201), a U-shaped frame (202) is connected to the base plate (201), an ear plate (203) is connected to the U-shaped frame (202), and a connecting rod (4) is rotatably connected to the ear plate (203) by a pin.

3. The spiral bevel gear wire EDM keyway setting device as described in claim 2, characterized in that: The connecting rod (4) is connected to a sleeve (7), and both the ear plate (203) and the sleeve (7) are connected to a ring (204). The two ends of the elastic element (6) are respectively connected to the two rings (204).

4. The spiral bevel gear wire EDM keyway setting device as described in claim 2, characterized in that: The bottom of the base plate (201) is connected to a rectangular block (205), which is engaged in the long groove (101).

5. The spiral bevel gear wire EDM keyway setting device as described in claim 1, characterized in that: The ball-head positioning pin (5) is connected to the bottom of the connecting rod (4) near the positioning post (3), and the ball-head positioning pin (5) is aligned vertically with the long groove (101) on the base (1).

6. The spiral bevel gear wire EDM keyway setting device as described in claim 1, characterized in that: The bottom end of the positioning column (3) is provided with a flange (302), which is connected to the base (1).

7. The spiral bevel gear wire EDM keyway setting device as described in claim 1, characterized in that: The positioning groove (301) is located on the outer circular surface of the positioning post (3) away from the ball head positioning pin (5), and the positioning groove (301) is aligned vertically with the long groove (101).

8. The spiral bevel gear wire EDM keyway setting device as described in claim 1, characterized in that: The elastic element (6) is a tension spring.

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