A rotor worm replacement tool

Abstract

This invention relates to a rotor worm gear replacement fixture, comprising a base assembly and a worm gear removal limiting fixture: including a first limiting sleeve with a through hole on the first limiting sleeve facing the limiting rod, and a blind hole on the upper end face of the first limiting sleeve, into which a worm gear dummy shaft positioning sleeve is inserted; and a worm gear installation limiting fixture: including a worm gear true shaft positioning sleeve with a through hole on the worm gear true shaft positioning sleeve facing the limiting rod. When the dummy shaft is inserted and the original worm shaft is pushed out, the worm gear removal limiting fixture provides positioning assistance at a certain height. When installing the worm shaft, since there is no worm shaft inside the rotor, the worm gear installation limiting fixture plays a guiding and directional role. The two sets of fixtures are used interchangeably, enabling rapid disassembly and replacement of the worm shaft inside the rotor. This fixture is suitable for industrial production and has strong practicality.

Description

Technical Field

[0001] This invention belongs to the technical field of rotor repair tooling equipment, and particularly relates to a rotor worm gear replacement tooling. Background Technology

[0002] A patent application (CN202211026144.5) entitled "Tooling for Replacing a Rotor Shaft" is disclosed in the existing patent database. It includes a replacement bracket, within which a replacement tool, a limiting bracket, and a support bracket are respectively arranged. The limiting bracket and the support bracket are slidably mounted on the upper surface of the replacement bracket. The replacement tool is positioned between the limiting bracket and the support bracket during replacement. The replacement tool includes a commutator ring, a rotor sleeve, and a locking screw. The locking screw has a threaded design. The fixed rotor sleeve is fitted onto the outside of the rotor at the opening on one side of the fixed commutator ring. A limiting ring and a supporting ring are respectively provided inside the limiting frame and the supporting frame. The limiting ring and the fixed rotor sleeve are slidably sleeved, and the supporting ring and the fixed commutator ring are rotatably sleeved. A limiting plate is provided on one side of the limiting ring. By designing and replacing the tooling, the old rotor shaft can be removed and a new motor shaft can be pressed in, reducing losses and lowering the scrap rate due to motor shaft issues; reducing scrap costs and enhancing market competitiveness.

[0003] Existing electric linear actuator worm shafts are prone to wear or breakage during transmission, making it impossible to replace the shaft without disassembly. Furthermore, once the rotor is disassembled, it cannot be restored and the entire rotor assembly must be scrapped, resulting in high maintenance costs. Therefore, this solution aims to propose a rotor worm shaft replacement fixture that can quickly replace the worm shaft inside the rotor. Summary of the Invention

[0004] The technical problem to be solved by the present invention is how to replace the worm shaft inside the rotor without disassembling the rotor. In order to improve its shortcomings, the present invention provides a rotor worm replacement fixture.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A rotor worm gear replacement fixture includes: Base assembly: includes a base, a positioning cylinder is connected to the upper surface of the base, a first positioning hole and a second positioning hole are respectively opened in the positioning cylinder, a rotor positioning seat is inserted into the first positioning hole, a commutator positioning fixture is connected to the second positioning hole, and a vertical limiting rod is inserted into the rotor positioning seat. The worm gear limiting fixture includes a first limiting sleeve, a through hole on the first limiting sleeve facing the limiting rod, a blind hole on the upper end face of the first limiting sleeve, and a worm gear dummy shaft positioning sleeve inserted into the blind hole. Worm gear limiting fixture: includes a worm gear true shaft positioning sleeve, and a through hole is opened on the worm gear true shaft positioning sleeve opposite to the limiting rod.

[0006] Compared with the prior art, the beneficial effects of this invention are as follows: due to the separate setting of the worm gear disassembly limiting fixture and the worm gear disassembly limiting fixture, when the original worm gear shaft is pushed out by the insertion of the dummy shaft, the worm gear disassembly limiting fixture provides positioning assistance at a certain height. When installing the worm gear shaft, since there is no worm gear shaft inside the rotor, the worm gear installation limiting fixture plays a guiding and orientation role. The two sets of fixtures are used in combination, which can quickly complete the disassembly and replacement of the worm gear shaft inside the rotor. It is suitable for industrial production and has strong practicality.

[0007] As a preferred embodiment, the commutator positioning fixture is arranged in a ring shape, and a third positioning hole is provided inside the commutator positioning fixture. The lower end face of the commutator of the rotor is fitted to the bottom surface of the third positioning hole. An external thread is provided on the outer circumferential surface of the commutator positioning fixture, and an internal thread is provided in the second positioning hole of the positioning cylinder. The external thread and the internal thread cooperate to screw the commutator positioning fixture into the second positioning hole.

[0008] As a preferred embodiment, a first threaded hole and a second threaded hole are respectively opened on the outer peripheral surface of the positioning cylinder. A set screw is screwed into both the first threaded hole and the second threaded hole. The free end of the set screw located in the first threaded hole abuts against the outer peripheral surface of the rotor positioning seat, and the free end of the set screw located in the second threaded hole abuts against the outer peripheral surface of the commutator positioning fixture.

[0009] As a preferred embodiment, the upper surface of the base is provided with an annular protrusion, and the lower surface of the positioning cylinder is correspondingly provided with an annular groove. The positioning cylinder is engaged with the positioning cylinder by the cooperation of the annular protrusion and the annular groove.

[0010] As a preferred embodiment, the base, commutator positioning fixture, first limiting sleeve, worm gear dummy shaft positioning sleeve, and worm gear real shaft positioning sleeve are all provided with a central hole.

[0011] As a preferred embodiment, a vertical keyway is provided on the inner wall of the rotor positioning seat, and a positioning key is connected in the keyway. A groove is provided on the outer circumferential surface of the rotor core on the rotor, and the other end of the positioning key is located in the groove. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the base assembly in this invention.

[0013] Figure 2 This is a schematic diagram of the internal structure of the base assembly in this invention.

[0014] Figure 3 This is an exploded view of the structure of the worm gear limiting tool and the base assembly in this invention.

[0015] Figure 4This is an exploded view of the structure of the worm gear limiting fixture and the base assembly in this invention.

[0016] In the figure: 1 base, 101 annular protrusion, 2 positioning cylinder, 201 annular groove, 3 first positioning hole, 4 second positioning hole, 5 rotor positioning seat, 501 keyway, 502 positioning key, 6 commutator positioning fixture, 7 limit rod, 8 first limit sleeve, 9 blind hole, 10 worm gear dummy shaft positioning sleeve, 11 worm gear real shaft positioning sleeve, 12 third positioning hole, 13 first threaded hole, 14 second threaded hole. Detailed Implementation

[0017] The technical solution of this application will be further described below with reference to the accompanying drawings and embodiments.

[0018] like Figure 1-4 As shown, a rotor worm gear replacement fixture includes: Base assembly: includes a base 1, a positioning cylinder 2 connected to the upper surface of the base 1, a first positioning hole 3 and a second positioning hole 4 respectively opened in the positioning cylinder 2, a rotor positioning seat 5 inserted into the first positioning hole 3, a commutator positioning fixture 6 connected to the second positioning hole 4, and a vertical limiting rod 7 inserted into the rotor positioning seat 5. The worm gear limiting fixture includes a first limiting sleeve 8, a through hole on the first limiting sleeve 8 opposite to the limiting rod 7, a blind hole 9 on the upper surface of the first limiting sleeve 8, and a worm gear dummy shaft positioning sleeve 10 inserted into the blind hole 9. Worm gear limiting fixture: includes worm gear true shaft positioning sleeve 11, worm gear true shaft positioning sleeve 11, and a through hole is opened on the worm gear true shaft positioning sleeve 11 opposite to the limiting rod 7.

[0019] Specifically, the commutator positioning fixture 6 is ring-shaped, and a third positioning hole 12 is provided inside the commutator positioning fixture 6. The lower end face of the rotor commutator is fitted to the bottom surface of the third positioning hole 12. The outer circumferential surface of the commutator positioning fixture 6 is provided with external threads, and the second positioning hole 4 of the positioning cylinder 2 is provided with internal threads. The external threads and internal threads mate to screw the commutator positioning fixture 6 into the second positioning hole 4. The depth to which the commutator positioning fixture 6 is screwed into the second positioning hole 4 can be adjusted to accommodate rotors of different specifications.

[0020] Specifically, a first threaded hole 13 and a second threaded hole 14 are respectively opened on the outer peripheral surface of the positioning cylinder 2. Set screws are screwed into both the first threaded hole 13 and the second threaded hole 14. The free end of the set screw in the first threaded hole 13 abuts against the outer peripheral surface of the rotor positioning seat 5, and the free end of the set screw in the second threaded hole 14 abuts against the outer peripheral surface of the commutator positioning fixture 6. The combination of the two threaded holes and the set screws can fix and limit the rotor positioning seat 5 and the commutator positioning fixture 6, preventing them from rotating relative to the positioning cylinder 2 during the pressing of the worm shaft, thus improving the stability between the components.

[0021] Specifically, the upper surface of the base 1 is provided with an annular protrusion 101, and the lower surface of the positioning cylinder 2 is correspondingly provided with an annular groove 201. The positioning cylinder 2 is engaged with the positioning cylinder 2 through the cooperation of the annular protrusion 101 and the annular groove 201. The base 1, the commutator positioning fixture 6, the first limiting sleeve 8, the worm dummy shaft positioning sleeve 10, and the worm real shaft positioning sleeve 11 are all provided with center holes. The inner wall of the rotor positioning seat 5 is provided with a vertical keyway 501, and a positioning key 502 is connected in the keyway 501. The outer circumferential surface of the rotor core on the rotor is provided with a groove, and the other end of the positioning key 502 is located in the groove.

[0022] The implementation process of this invention is as follows: Disassembly of the worm shaft: Place the rotor into the base assembly, ensuring the lower end face of the rotor's commutator is flush with the third positioning hole 12 of the steering gear positioning fixture. Then, align the through hole of the first limiting sleeve 8 with the limiting rod 7, and vertically place the first limiting sleeve 8 above the rotor positioning seat 5, ensuring the lower end face of the first limiting sleeve 8 is flush with the upper end face of the rotor positioning sleeve. After completion, insert the worm dummy shaft positioning sleeve 10 into the blind hole 9 on the upper end face of the first limiting sleeve 8. Insert the worm dummy shaft into the center hole of the worm dummy shaft positioning sleeve 10, place it in the press, and press the worm dummy shaft down at a uniform speed until it abuts against the tail of the worm true shaft. Slowly and uniformly push out the worm true shaft until the upper end face of the worm dummy shaft is flush with the upper end face of the worm dummy shaft positioning sleeve 10. Stop pressing, thus completing the removal of the worm shaft.

[0023] Installation of the worm shaft: Vertically place the worm shaft positioning sleeve 11 above the rotor positioning seat 5, so that the lower end face of the worm shaft positioning sleeve 11 is in contact with the upper end face of the rotor positioning sleeve. After completion, insert the new worm shaft to be replaced into the center hole of the worm shaft positioning sleeve 11, place it in the press, and press the new worm shaft down at a uniform speed until the upper end face of the new worm shaft is flush with the upper end face of the worm shaft positioning sleeve 11. Stop pressing, remove the worm shaft positioning sleeve 11, and take out the rotor assembly. The installation of the worm shaft is now complete.

[0024] This invention is not limited to the above embodiments. Based on the technical solutions disclosed in this invention, those skilled in the art can make some substitutions and modifications to some of the technical features without creative effort, and all such substitutions and modifications are within the protection scope of this invention.

Claims

1. A rotor worm gear replacement fixture, characterized in that: Including: Base assembly: includes a base (1), a positioning cylinder (2) is connected to the upper surface of the base (1), a first positioning hole (3) and a second positioning hole (4) are respectively opened in the positioning cylinder (2), a rotor positioning seat (5) is inserted into the first positioning hole (3), a commutator positioning fixture (6) is connected into the second positioning hole (4), and a vertical limiting rod (7) is inserted into the rotor positioning seat (5). The worm gear limiting fixture includes a first limiting sleeve (8), a through hole is provided on the first limiting sleeve (8) opposite to the limiting rod (7), a blind hole (9) is provided on the upper end face of the first limiting sleeve (8), and a worm gear dummy shaft positioning sleeve (10) is inserted into the blind hole (9). Worm gear limiting fixture: includes a worm gear true shaft positioning sleeve (11), and a through hole is opened on the worm gear true shaft positioning sleeve (11) opposite to the limiting rod (7).

2. The rotor worm gear replacement fixture according to claim 1, characterized in that: The commutator positioning fixture (6) is arranged in a ring shape. A third positioning hole (12) is provided in the commutator positioning fixture (6). The lower end face of the commutator of the rotor is attached to the bottom surface of the third positioning hole (12). The outer circumferential surface of the commutator positioning fixture (6) is provided with an external thread. The second positioning hole (4) of the positioning cylinder (2) is provided with an internal thread. The external thread and the internal thread cooperate to screw the commutator positioning fixture (6) into the second positioning hole (4).

3. The rotor worm gear replacement fixture according to claim 2, characterized in that: The outer circumferential surface of the positioning cylinder (2) is provided with a first threaded hole (13) and a second threaded hole (14). Set screws are screwed into the first threaded hole (13) and the second threaded hole (14). The free end of the set screw in the first threaded hole (13) abuts against the outer circumferential surface of the rotor positioning seat (5), and the free end of the set screw in the second threaded hole (14) abuts against the outer circumferential surface of the commutator positioning fixture (6).

4. The rotor worm gear replacement fixture according to claim 3, characterized in that: The upper surface of the base (1) is provided with an annular protrusion (101), and the lower surface of the positioning cylinder (2) is provided with an annular groove (201). The positioning cylinder (2) is engaged with the positioning cylinder (2) by the cooperation of the annular protrusion (101) and the annular groove (201).

5. A rotor worm gear replacement fixture according to any one of claims 1-4, characterized in that: The base (1), commutator positioning fixture (6), first limiting sleeve (8), worm dummy shaft positioning sleeve (10) and worm real shaft positioning sleeve (11) are all provided with a center hole.

6. The rotor worm gear replacement fixture according to claim 5, characterized in that: A vertical keyway (501) is provided on the inner wall of the rotor positioning seat (5), and a positioning key (502) is connected in the keyway (501). A groove is provided on the outer circumferential surface of the rotor core on the rotor, and the other end of the positioning key (502) is located in the groove.

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