New energy motor shaft end internal gear engagement scraping repair device and method

Abstract

The present invention discloses a device for scraping and repairing the internal teeth of the end of a new energy motor shaft, comprising a base, a slide bar, an elastic member, a support block, a cutter bar, and a cutter. One end of the base is provided with an inclined mounting hole, a limit member is connected to the base, and the slide bar slides and fits in the mounting hole within the limit of the limit member. The elastic member is located in the mounting hole, and the elastic member pushes the slide bar to slide in a direction away from the mounting hole. One end of the slide bar is connected to the support block, and one end of the cutter bar is rotatably connected to the support block. The cutter is in the shape of a bevel gear and is connected to the other end of the cutter bar. The cutter has a back angle of 5 to 7 degrees and a front angle of 3 to 7 degrees. Compared with the prior art, the present invention has a reasonable structure and is easy to use. It uses a meshing scraping method to effectively repair the deformation of the motor shaft caused by heat treatment, thereby recovering the economic losses of the enterprise.

Description

Technical Field

[0001] The present invention relates to the field of machining technology, and in particular to a device and method for scraping and repairing the internal teeth of a new energy motor shaft end. Background Art

[0002] The drive motor is a core component of new energy vehicles, and the motor shaft is a key part within the entire drive motor, securing the rotor core and transmitting torque. Most of the new energy vehicle motor shafts that have emerged in recent years share a characteristic: a hollow, thin-walled structure with external or internal teeth near the end faces. During quenching, the tooth surfaces deform, shrink, or expand. The amount of contraction or expansion varies with each heat, resulting in a significant portion of products failing to fit through the internal and external teeth gauge. Furthermore, due to the quenched tooth surfaces, the tooth surface has a crushing degree of HRc55-62, making them unrepairable and requiring immediate scrapping, resulting in significant financial losses for the manufacturer. Summary of the Invention

[0003] The purpose of the present invention is to provide a device and method for repairing the internal teeth of the motor shaft end by meshing scraping, which has a reasonable structure and is easy to use. It uses meshing scraping to effectively repair the deformation of the motor shaft caused by heat treatment, thereby recovering the economic losses of the enterprise and solving the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A new energy motor shaft end internal tooth engagement scraping and repair device comprises a base, a slide rod, an elastic member, a support block, a cutter bar and a cutter; an inclined mounting hole is provided at one end of the base, a limit member is connected to the base, and the slide rod slides and fits in the mounting hole within the limit range of the limit member; the elastic member is located in the mounting hole, and the elastic member pushes the slide rod to slide in a direction away from the mounting hole; one end of the slide rod is connected to the support block, and one end of the cutter bar is rotatably connected to the support block; the cutter is in the shape of a bevel gear, and the cutter is connected to the other end of the cutter bar.

[0006] A further solution of the present invention is that the base is Z-shaped and the mounting hole is stepped; the sliding rod is in the shape of a stepped shaft, the large diameter section of the sliding rod slides in the mounting hole, the top of the sliding rod is provided with an external thread and is connected to a limiting nut, and the limiting nut is clamped at the step at the top of the mounting hole.

[0007] A further solution of the present invention is that the elastic member is a plurality of disc springs, which are sleeved on the small diameter section of the slide rod in the mounting hole, with one end of the disc spring abutting against the step of the mounting hole and the other end abutting against the step of the slide rod.

[0008] A further solution of the present invention is that a sliding groove is provided on the outer circular surface of the slide rod, and a threaded hole A is provided on the base to pass through the mounting hole. A guide bolt is threadedly fitted in the threaded hole A, and the guide bolt slides in the sliding groove, and a locking groove is provided on the outer circular surface of the guide bolt.

[0009] A further solution of the present invention is that a threaded hole B is provided on the base and passes through the threaded hole A. A locking bolt is threadedly fitted in the threaded hole B, and the locking bolt extends into the locking groove.

[0010] A further solution of the present invention is that the support block and the sliding rod are integrally formed, and a stepped through hole is provided on the support block, in which two ball bearings are interference fit, and one end of the support block is connected to an end cover, which abuts against the outer ring of the rear end ball bearing; the tool rod is in the shape of a stepped shaft, and the small diameter section of the tool rod is interference fit with the inner rings of the two ball bearings, and the step of the tool rod is clamped to the inner ring of the front end ball bearing; the rear end of the tool rod is connected to a baffle, which is clamped to the end face of the rear end ball bearing.

[0011] A further solution of the present invention is that the front end of the tool rod is an expansion sleeve, the center hole of the tool is sleeved on the outer wall of the expansion sleeve, and the end thread of the tool rod is matched with a frustum-shaped internal expansion bolt. After the internal expansion bolt is tightened, the expansion sleeve tightens the center hole of the tool.

[0012] A further solution of the present invention is that the back angle of the tool is 5 to 7 degrees, and the front angle is 3 to 7 degrees.

[0013] A further solution of the present invention is that the inclination angle of the slide bar is 11°.

[0014] A method for scraping and repairing the internal gear engagement at the end of a new energy motor shaft, the specific steps are as follows:

[0015] Step 1. Clamping: Before processing, the motor shaft is clamped on the fixture of the machine tool spindle. The base of the repair device is installed on the tool holder of the machine tool. The tool holder is installed on the feed box of the machine tool. The axial direction of the motor shaft is set as the Z coordinate and the radial direction of the motor shaft is set as the X coordinate.

[0016] Step 2: Feed: Driven by the feed box, the tool moves in the positive direction to the X coordinate zero position. At this time, the tool is concentric with the motor shaft. Then the tool moves in the Z direction and enters the inner hole at the end of the motor shaft. The tool moves in the negative direction of the X coordinate to engage with the internal teeth of the motor shaft. Since the slide bar can move elastically under the action of the butterfly spring, it effectively protects the tool and the internal teeth of the motor shaft from being damaged by hard impact.

[0017] Step 3. Processing: The spindle drives the motor shaft to rotate forward, the motor shaft drives the tool to rotate forward, and the feed box drives the tool to move back and forth along the positive and negative directions of the Z coordinate 1 to 4 times. Then, the spindle drives the motor shaft to reverse, the motor shaft drives the tool to reverse, and the feed box drives the tool to move back and forth along the positive and negative directions of the Z coordinate 1 to 4 times. The tool can then scrape and repair the internal teeth of the motor shaft by 0.02 to 0.05 mm. In addition, when the feed box drives the tool to move back and forth along the positive and negative directions of the Z coordinate, the tool must not completely separate from the internal teeth of the motor shaft.

[0018] Beneficial effects of the present invention:

[0019] The internal tooth meshing scraping repair device and method for the new energy motor shaft end of the present invention has a reasonable structure and is easy to use. It uses meshing scraping to effectively repair the deformation of the motor shaft caused by heat treatment, thereby recovering the economic losses of the enterprise.

[0020] The device and method for scraping and repairing the inner teeth of the new energy motor shaft end of the present invention adopt an elastic slide bar to ensure that the tool and the inner teeth of the motor shaft are automatically engaged, and the tool and the inner teeth of the motor shaft will not be damaged due to hard impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the local structure of the motor shaft.

[0022] Figure 2 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 3 This is a schematic diagram of the knife bar installation of the present invention.

[0024] Figure 4 It is a schematic diagram of the present invention in working state.

[0025] Figure 5 This is a physical diagram of the present invention.

[0026] In the figure: 1-base, 101-mounting hole, 102-guide bolt, 103-locking bolt, 2-slide rod, 201-limit nut, 202-slide groove, 3-elastic member, 4-support block, 401-ball bearing, 402-end cover, 403-baffle, 5-tool rod, 501-inner expansion bolt, 6-tool, 7-motor shaft, 701-inner hole, 702-inner teeth. DETAILED DESCRIPTION

[0027] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0028] Example 1: Figures 1 to 3As shown, a new energy motor shaft end internal tooth engagement scraping and repairing device includes a base 1, a slide rod 2, an elastic member 3, a support block 4, a knife bar 5 and a tool 6; one end of the base 1 is provided with an inclined mounting hole 101, a limiting member is connected to the base 1, and the slide rod 2 slides and fits in the mounting hole 101 within the limited range of the limiting member; the elastic member 3 is located in the mounting hole 101, and the elastic member 3 pushes the slide rod 2 to slide in the direction of separating from the mounting hole 101; one end of the slide rod 2 is connected to the support block 4, and one end of the knife bar 5 is rotatably connected to the support block 4; the tool 6 is in the shape of a bevel gear, and the tool 6 is connected to the other end of the knife bar 5.

[0029] The base 1 is Z-shaped, and the mounting hole 101 is stepped; the slide rod 2 is in the shape of a stepped shaft, and the large diameter section of the slide rod 2 slides into the mounting hole 101. The top of the slide rod 2 is provided with an external thread and is connected to a limiting nut 201, and the limiting nut 201 is clamped at the step at the top of the mounting hole 101.

[0030] The elastic member 3 is a plurality of disc springs, which are sleeved on the small diameter section of the slide bar 2 in the mounting hole 101 . One end of the disc spring abuts against the step of the mounting hole 101 , and the other end abuts against the step of the slide bar 2 .

[0031] A slide groove 202 is provided on the outer circular surface of the slide rod 2, and a threaded hole A is provided on the base 1 that passes through the mounting hole 101. A guide bolt 102 is threadedly fitted in the threaded hole A. The guide bolt 102 slides in the slide groove 202, and a locking groove is provided on the outer circular surface of the guide bolt 102.

[0032] The base 1 is provided with a threaded hole B penetrating the threaded hole A. A locking bolt 103 is threadedly engaged in the threaded hole B, and the locking bolt 103 extends into the locking groove.

[0033] The support block 4 is integrally formed with the slide rod 2, and a stepped through hole is provided on the support block 4, in which two ball bearings 401 are interference fit. One end of the support block 4 is connected to an end cover 402, and the end cover 402 abuts against the outer ring of the rear end ball bearing 401; the tool rod 5 is in the shape of a stepped shaft, and the small diameter section of the tool rod 5 is interference fit in the inner rings of the two ball bearings 401, and the step of the tool rod 5 is clamped to the inner ring of the front end ball bearing 401; the rear end of the tool rod 5 is connected to a baffle 403, and the baffle 403 is clamped to the end face of the rear end ball bearing 401.

[0034] The front end of the tool rod 5 is an expansion sleeve, and the center hole of the tool 6 is sleeved on the outer wall of the expansion sleeve. The end thread of the tool rod 5 is matched with a frustum-shaped internal expansion bolt 501. After the internal expansion bolt 501 is tightened, the expansion sleeve tightens the center hole of the tool 6.

[0035] The back angle of the tool 6 is 5 to 7 degrees, and the front angle is 3 to 7 degrees.

[0036] The inclination angle of the slide bar 2 is 11°.

[0037] A method for repairing the meshing scraping of the inner teeth 702 at the end of the new energy motor shaft 7, the specific steps are as follows:

[0038] Step 1, clamping: Before processing, the motor shaft 7 is clamped on the fixture of the machine tool spindle, the base 1 of the repair device is installed on the tool holder of the machine tool, and the tool holder is installed on the feed box of the machine tool. The axial direction of the motor shaft 7 is set as the Z coordinate, and the radial direction of the motor shaft 7 is set as the X coordinate;

[0039] Step 2: Feed: Figure 4 As shown, under the drive of the feed box, the tool 6 moves in the positive direction to the X coordinate zero position. At this time, the tool 6 is concentric with the motor shaft 7. Then the tool 6 moves in the Z direction and enters the inner hole 701 at the end of the motor shaft 7. The tool 6 moves in the negative direction of the X coordinate so that the tool 6 engages with the inner teeth 702 of the motor shaft 7. Since the slide bar 2 can move elastically under the action of the butterfly spring, it effectively protects the tool 6 and the inner teeth 702 of the motor shaft 7 from being damaged due to hard impact.

[0040] Step 3, processing: the spindle drives the motor shaft 7 to rotate forward, the motor shaft 7 drives the tool 6 to rotate forward, and the feed box drives the tool 6 to move back and forth along the positive and negative directions of the Z coordinate 1 to 4 times, then the spindle drives the motor shaft 7 to reverse, the motor shaft 7 drives the tool 6 to reverse, and the feed box drives the tool 6 to move back and forth along the positive and negative directions of the Z coordinate 1 to 4 times, then the tool 6 can scrape and repair the inner teeth 702 of the motor shaft 7 by 0.02 to 0.05 mm; in addition, when the feed box drives the tool 6 to move back and forth along the positive and negative directions of the Z coordinate, the tool 6 must not completely separate from the inner teeth 702 of the motor shaft 7.

[0041] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A method for scraping and repairing the internal teeth of the shaft end of a new energy motor, characterized by: The invention comprises a base (1), a slide rod (2), an elastic member (3), a knife bar (5) and a knife (6); one end of the base (1) is provided with an inclined mounting hole (101), a limiting member is connected to the base (1), and the slide rod (2) is slidably matched in the mounting hole (101) within the limiting range of the limiting member; the elastic member (3) is located in the mounting hole (101), and the elastic member (3) pushes the slide rod (2) to slide in a direction away from the mounting hole (101); one end of the slide rod (2) is connected to a support block (4), and one end of the knife bar (5) is rotatably connected to the support block (4); the knife (6) is in the shape of a bevel gear, and the knife (6) is connected to the other end of the knife bar (5); the back angle of the knife (6) is 5 to 7 degrees, and the front angle is 3 to 7 degrees; the inclination angle of the slide rod (2) is 11 degrees; The specific steps are as follows: S1. Clamping: Before processing, the motor shaft (7) is clamped on the fixture of the machine tool spindle, the base (1) of the repair device is installed on the tool holder of the machine tool, and the tool holder is installed on the feed box of the machine tool. The axial direction of the motor shaft (7) is set as the Z coordinate, and the radial direction of the motor shaft (7) is set as the X coordinate; S2, feed: under the drive of the feed box, the tool (6) moves in the positive direction to the zero position of the X coordinate, at which time the tool (6) and the motor shaft (7) are concentric, and then the tool (6) moves in the Z direction, and the tool (6) enters the inner hole (701) at the end of the motor shaft (7), and the tool (6) moves in the negative direction of the X coordinate to make the tool (6) mesh with the inner teeth (702) of the motor shaft (7); because the slide bar (2) can move elastically under the action of the butterfly spring, it effectively protects the tool (6) and the inner teeth (702) of the motor shaft (7) from being damaged due to hard impact; S3, processing: the main shaft drives the motor shaft (7) to rotate forward, the motor shaft (7) drives the tool (6) to rotate forward, and the feed box drives the tool (6) to move back and forth along the positive and negative directions of the Z coordinate 1 to 4 times, the main shaft drives the motor shaft (7) to rotate reversely, the motor shaft (7) drives the tool (6) to rotate reversely, and the feed box drives the tool (6) to move back and forth along the positive and negative directions of the Z coordinate 1 to 4 times, and the tool (6) can scrape and repair the inner teeth (702) of the motor shaft (7) by 0.02 to 0.05 mm; in addition, when the feed box drives the tool (6) to move back and forth along the positive and negative directions of the Z coordinate, the tool (6) must not completely separate from the inner teeth (702) of the motor shaft (7).

2. The method for scraping and repairing the internal teeth of the new energy motor shaft end according to claim 1, characterized in that: The base (1) is Z-shaped, and the mounting hole (101) is stepped; the slide rod (2) is stepped shaft-shaped, and the large diameter section of the slide rod (2) is slidably fitted in the mounting hole (101); the top end of the slide rod (2) is provided with an external thread and connected to a limiting nut (201); the limiting nut (201) is clamped at the step at the top end of the mounting hole (101).

3. The method for scraping and repairing the internal teeth of the new energy motor shaft end according to claim 2, characterized in that: The elastic member (3) is a plurality of disc springs, which are sleeved on the small-diameter section of the slide bar (2) in the mounting hole (101), with one end of the disc spring abutting against the step of the mounting hole (101) and the other end abutting against the step of the slide bar (2).

4. The method for scraping and repairing the internal teeth of the new energy motor shaft end according to claim 1, characterized in that: A slide groove (202) is provided on the outer circumferential surface of the slide rod (2), a threaded hole A penetrating the mounting hole (101) is provided on the base (1), a guide bolt (102) is threadedly engaged in the threaded hole A, the guide bolt (102) is slidably engaged in the slide groove (202), and a locking groove is provided on the outer circumferential surface of the guide bolt (102).

5. The method for scraping and repairing the internal teeth of the new energy motor shaft end according to claim 4, characterized in that: The base (1) is provided with a threaded hole B penetrating the threaded hole A. A locking bolt (103) is threadedly engaged in the threaded hole B, and the locking bolt (103) extends into the locking groove.

6. The method for scraping and repairing the internal teeth of the new energy motor shaft end according to claim 1, characterized in that: The support block (4) and the slide rod (2) are integrally formed, and a stepped through hole is provided on the support block (4), and two ball bearings (401) are interference-fitted in the stepped through hole. One end of the support block (4) is connected to an end cover (402), and the end cover (402) abuts against the outer ring of the rear end ball bearing (401); the knife rod (5) is in the shape of a stepped shaft, and the small diameter section of the knife rod (5) is interference-fitted with the inner rings of the two ball bearings (401), and the step of the knife rod (5) is clamped to the inner ring of the front end ball bearing (401); the rear end of the knife rod (5) is connected to a baffle (403), and the baffle (403) is clamped to the end face of the rear end ball bearing (401).

7. The method for repairing the internal tooth engagement scraping of the new energy motor shaft end according to claim 1, characterized in that: The front end of the tool rod (5) is an expansion sleeve, and the center hole of the tool (6) is sleeved on the outer wall of the expansion sleeve. The end thread of the tool rod (5) is matched with a cone-shaped internal expansion bolt (501). After the internal expansion bolt (501) is tightened, the expansion sleeve tightens the center hole of the tool (6).

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