New energy motor shaft end internal tooth meshing scraping repairing device and method

Abstract

The invention discloses a new energy motor shaft end internal tooth meshing scraping repairing device which comprises a base, a sliding rod, an elastic piece, a supporting block, a cutter bar and a cutter. An inclined mounting hole is formed in one end of the base, a limiting piece is connected to the base, and the sliding rod is in sliding fit with the mounting hole within the limiting range of the limiting piece; the elastic piece is located in the mounting hole and pushes the sliding rod to slide in the direction away from the mounting hole. One end of the sliding rod is connected with a supporting block, and one end of the cutter bar is rotationally connected to the supporting block. The cutter is in a bevel gear shape and is connected to the other end of the cutter bar; the rear angle of the cutter is 5-7 degrees, and the front angle of the cutter is 3-7 degrees. Compared with the prior art, the device is reasonable in structure and convenient to use, deformation, caused by heat treatment, of the motor shaft is effectively repaired in a meshing scraping mode, and economic losses of enterprises are retrieved.

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 inner teeth of a new energy motor shaft end. Background Art

[0002] The drive motor is the core component of new energy vehicles, and the motor shaft is a key part of the entire drive motor, which is used to fix the rotor core and transmit torque. Most of the motor shafts of new energy vehicles that have emerged in recent years have a characteristic that the hollow thin wall has external or internal teeth near the end face. When the tooth surface is quenched, the motor shaft deforms, shrinks or expands. The shrinkage and expansion are different each time due to different furnace numbers, resulting in a large part of the products The internal and external teeth cannot pass through the gauge. Because the tooth surface has been quenched, the fragmentation reaches HRc55~62, and it cannot be repaired and is directly scrapped, causing great economic losses to the company. Summary of the invention

[0003] The purpose of the present invention is to provide a device and method for internal tooth meshing scraping repair of the end of a new energy motor shaft, which has a reasonable structure and is easy to use. It adopts 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 background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: A new energy motor shaft end internal tooth engagement scraping and repairing device comprises a base, a slide rod, an elastic member, a support block, a tool rod and a tool; an inclined mounting hole is provided at one end of the base, a limiting member is connected to the base, and the slide rod is slidably engaged in the mounting hole within the limiting range of the limiting 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 tool rod is rotatably connected to the support block; the tool is in the shape of a bevel gear, and the tool is connected to the other end of the tool rod.

[0005] 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 connected to a limiting nut, and the limiting nut is clamped at the step at the top of the mounting hole.

[0006] A further solution of the present invention is that the elastic member is a plurality of disc springs, the disc springs are sleeved on the small diameter section of the slide bar in the mounting hole, one end of the disc spring abuts against the step of the mounting hole, and the other end abuts against the step of the slide bar.

[0007] A further solution of the present invention is that a slide groove is provided on the outer circumferential surface of the slide rod, a threaded hole A penetrating the mounting hole is provided on the base, a guide bolt is threadedly matched in the threaded hole A, the guide bolt is slidably matched in the slide groove, and a locking groove is provided on the outer circumferential surface of the guide bolt.

[0008] A further solution of the present invention is that a threaded hole B penetrating the threaded hole A is provided on the base, and a locking bolt is threadedly matched in the threaded hole B, and the locking bolt extends into the locking groove.

[0009] A further solution of the present invention is that the support block and the sliding rod are integrally formed, and a step 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.

[0010] 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, the end thread of the tool rod is matched with a frustum-shaped internal expansion bolt, and when the internal expansion bolt is tightened, the expansion sleeve tightens the center hole of the tool.

[0011] A further solution of the present invention is that the back angle of the tool is 5-7° and the front angle is 3-7°.

[0012] A further solution of the present invention is that the inclination angle of the slide bar is 11°.

[0013] A method for scraping and repairing the inner teeth of the shaft end of a new energy motor, the specific steps are as follows: 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; Step 2, feeding: driven by the feed box, the tool moves in the positive direction to the zero position of the X coordinate, at which time the tool is concentric with the motor shaft, and then moves in the Z direction, the tool enters the inner hole at the end of the motor shaft, and the tool moves in the negative direction of the X coordinate to make the tool mesh with the inner teeth of the motor shaft; because the slide bar can move elastically under the action of the butterfly spring, the inner teeth of the tool and the motor shaft are effectively protected from being damaged due to hard impact; 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 for 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 for 1 to 4 times, then the tool can 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.

[0014] Beneficial effects of the present invention: The internal tooth meshing scraping repair device and method for the end portion of a new energy motor shaft of the present invention has a reasonable structure and is easy to use. The meshing scraping method is used to effectively repair the deformation of the motor shaft caused by heat treatment, thereby recovering the economic losses of the enterprise.

[0015] The device and method for scraping and repairing the inner teeth of the end of a new energy motor shaft of the present invention adopt an elastic slide bar to ensure that the tool and the inner teeth of the motor shaft are automatically meshed, and the tool and the inner teeth of the motor shaft will not be damaged due to hard impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the local structure of the motor shaft.

[0017] Figure 2 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 3 It is a schematic diagram of the installation of the knife bar of the present invention.

[0019] Figure 4 It is a schematic diagram of the present invention in working state. Figure 5 This is a physical diagram of the present invention.

[0020] 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

[0021] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments.

[0022] Example 1: Figures 1 to 3 As shown, a new energy motor shaft end internal tooth engagement scraping and repairing device includes a base 1, a slide bar 2, an elastic member 3, a support block 4, a tool rod 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 bar 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 bar 2 to slide in the direction of separating from the mounting hole 101; one end of the slide bar 2 is connected to the support block 4, and one end of the tool rod 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 tool rod 5.

[0023] 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 in the mounting hole 101. The top of the slide rod 2 is provided with an external thread and connected to a limiting nut 201, and the limiting nut 201 is clamped at the step at the top of the mounting hole 101.

[0024] 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 .

[0025] A slide groove 202 is provided on the outer circumferential surface of the slide rod 2, and a threaded hole A penetrating the mounting hole 101 is provided on the base 1. A guide bolt 102 is threadedly matched in the threaded hole A. The guide bolt 102 slides in the slide groove 202, and a locking groove is provided on the outer circumferential surface of the guide bolt 102.

[0026] The base 1 is provided with a threaded hole B penetrating the threaded hole A. The threaded hole B is threadedly matched with a locking bolt 103 , and the locking bolt 103 extends into the locking groove.

[0027] 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, and one end of the support block 4 is connected to an end cover 402, which 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 fit in 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.

[0028] 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.

[0029] The back angle of the tool 6 is 5 to 7°, and the front angle is 3 to 7°.

[0030] The inclination angle of the slide bar 2 is 11°.

[0031] A method for repairing the inner teeth 702 of the end of the new energy motor shaft 7 by scraping and meshing, the specific steps are as follows: 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, 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; Step 2: Feed: Figure 4As shown, 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 is concentric with the motor shaft 7, 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, the tool 6 and the inner teeth 702 of the motor shaft 7 are effectively protected from being damaged due to hard impact; 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 for 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 for 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.

[0032] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent transformation or modification made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A new energy motor shaft end internal gear engagement scraping and repairing device, characterized in that: The invention comprises a base (1), a slide bar (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 bar (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 bar (2) to slide in a direction away from the mounting hole (101); one end of the slide bar (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).

2. The internal tooth engagement scraping and repairing device for the end of the new energy motor shaft 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 matched in the mounting hole (101); the top end of the slide rod (2) is provided with an external thread and connected to a limit nut (201); the limit nut (201) is clamped at the step at the top end of the mounting hole (101).

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

7. The internal tooth engagement scraping and repairing device for the end of the new energy motor shaft according to claim 1, characterized in that: The front end of the tool rod (5) is an expansion sleeve, the center hole of the tool (6) is sleeved on the outer wall of the expansion sleeve, and 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).

8. The internal tooth engagement scraping and repairing device for the end of the new energy motor shaft according to claim 1, characterized in that: The tool (6) has a back angle of 5 to 7 degrees and a front angle of 3 to 7 degrees.

9. The internal tooth engagement scraping and repairing device for the end of the new energy motor shaft according to claim 1, characterized in that: The inclination angle of the sliding rod (2) is 11°.

10. A method for scraping and repairing the inner teeth of the shaft end of a new energy motor, using the scraping and repairing device for the inner teeth of the shaft end of a new energy motor as described in any one of the strong requirements 1-9, characterized in that 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, the tool holder is installed on the feed box of the machine tool, and 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, feeding: driven by 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, 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, the tool (6) and the inner teeth (702) of the motor shaft (7) are effectively protected from being damaged due to hard impact; S3, machining: 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 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, 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).

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