Roll riveting device for armature shaft

Through the rotating servo motor and the extrusion servo motor, the bearing ripping problem of the armature shaft during rotation is solved, the jumping and tool cost of the armature shaft is reduced, and the processing efficiency is improved.

CN223171765UActive Publication Date: 2025-08-01ANHUI SHENGHUAHUA AUTOMOBILE ELECTRICAL APPLIANCECO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202422142292.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-02
Publication Date
2025-08-01
Estimated Expiration
2034-09-02

AI Technical Summary

Technical Problem

In the prior art, the armature shaft slotted insertion spring or punching notch method increases production process and cost, while the fixed gradient radius hob rivet method has a long processing cycle and high cost, resulting in increased jumping of the armature shaft.

Method used

The rotary servo motor and the extrusion servo motor interact with each other. The armature shaft is rotated and extruded by driving the hob and extrusion hob, rolling out the groove to limit the bearing movement, and using the groove edge to define the bearing position, reducing the additional jump of the armature shaft and simplifying tool replacement.

Benefits of technology

The stability of the armature shaft during rotation is achieved, the machining armature shaft jumps is reduced, the tool replacement process is simplified and the cost is reduced.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223171765U_ABST
    Figure CN223171765U_ABST
Patent Text Reader

Abstract

The utility model discloses an armature shaft roll riveting device which comprises a machine base. The driving hob is axially arranged on the machine base and is in frictional contact with the armature shaft to drive the armature shaft to rotate; the rotary servo motor is mounted on the machine base and drives the driving hob to rotate; the extrusion hob seat is arranged on the machine base in a sliding manner; the extrusion hob is axially arranged on the extrusion hob seat; and the extrusion servo motor is mounted on the machine base, drives the extrusion hob seat to move towards the armature shaft, drives the extrusion hob to radially extrude the armature shaft and rotates along with the armature shaft through friction force for extrusion. According to the utility model, the problem of bearing play caused by radial stress in the rotation process of the armature is solved, so that force loss or stall of a motor caused by position deviation in the operation process of the armature is avoided, and the operation stability of the armature is ensured. The newly-added run-out of the machined armature shaft is remarkably reduced, model changing is convenient, and the tool cost is greatly reduced.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to the technical field of armature manufacturing equipment, and particularly relates to an armature shaft rolling riveting device. Background Art

[0002] In order to limit the problem of bearing creep caused by radial force during the rotation of the armature, some manufacturers on the market solve this problem by slotting the armature shaft to insert a circlip, or by stamping a notch, or by using a fixed variable radius hob for rolling riveting.

[0003] Slotting the armature shaft increases the production process and the number of assembled parts; the method of stamping a notch on the armature shaft will cause the armature shaft to be stressed during stamping, increasing the runout of the armature shaft; the fixed variable radius hob has high tooling cost, long cycle, and long replacement and adjustment time. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide an armature shaft rolling riveting device with significantly reduced additional runout after processing of the armature shaft, convenient tool change, and greatly reduced tool cost, aiming at the above-mentioned deficiencies existing in the methods of slotting the armature shaft to insert a circlip, or stamping a notch, or using a fixed variable radius hob for rolling riveting.

[0005] The technical problem to be solved by the utility model can be realized through the following technical solutions:

[0006] An armature shaft rolling riveting device, comprising:

[0007] A machine base;

[0008] A driving hob arranged on the machine base, which is in frictional contact with the armature shaft and drives the armature shaft to rotate;

[0009] A rotary servo motor installed on the machine base, which drives the driving hob to rotate;

[0010] An extrusion hob seat slidably arranged on the machine base;

[0011] An extrusion hob arranged on the extrusion hob seat;

[0012] An extrusion servo motor installed on the machine base, which drives the extrusion hob seat to move towards the armature shaft direction, drives the extrusion hob to radially extrude the armature shaft, and rotates and extrudes with the armature shaft through friction.

[0013] In a preferred embodiment of the utility model, the extrusion servo motor drives the extrusion hob seat to slide on the machine base through a screw drive mechanism.

[0014] In a preferred embodiment of the present utility model, the extrusion hob seat is installed on the machine base through a slide rail and slider mechanism.

[0015] In a preferred embodiment of the present utility model, the rotary servo motor drives the driving hob to rotate through a belt drive mechanism.

[0016] In a preferred embodiment of the present utility model, a driving hob installation groove is provided on the machine base, and the driving hob is installed in the driving hob installation groove through a driving hob elastic pressing block; an extrusion hob installation groove is provided on the extrusion hob seat, and the extrusion hob is installed in the extrusion hob installation groove through an extrusion hob elastic pressing block.

[0017] In a preferred embodiment of the present utility model, handles are provided on both the driving hob and the extrusion hob.

[0018] Due to the adoption of the above technical solutions, in the present utility model, the armature assembly is driven to rotate by the interaction of the rotary servo motor and the extrusion servo motor. During the rotation process, an extrusion hob is used to extrude and roll a groove on the shaft surface of the armature shaft, and the bearing on the armature shaft is limited by the groove edge, solving the problem of bearing creep caused by radial force during the rotation of the armature, so that the armature will not lose force or stall due to position deviation during operation, ensuring the stability of the armature operation. At the same time, compared with other methods, the new riveting method significantly reduces the additional runout of the processed armature shaft, is convenient for tool change, and greatly reduces the tool cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. 1 is one of the schematic diagrams of the armature shaft riveting device of the present utility model for processing an armature.

[0020] Figure 2 FIG. 2 is another schematic diagram of the armature shaft riveting device of the present utility model for processing an armature.

[0021] Figure 3 FIG. 3 is one of the partial structural schematic diagrams of the armature shaft riveting device of the present utility model.

[0022] Figure 4 FIG. 4 is another partial structural schematic diagram of the armature shaft riveting device of the present utility model.

[0023] Figure 5 FIG. 5 is still another partial structural schematic diagram of the armature shaft riveting device of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] See Figures 1 to 5, The armature shaft riveting device shown in the figure includes: a machine base 100, a driving hob 200, a rotary servo motor 300, an extrusion hob seat 400, an extrusion hob 500, and an extrusion servo motor 600.

[0026] A driving hob mounting groove 110 is provided on the machine base 100. The driving hob 200 is designed in a quick-release manner for quick replacement. That is, the driving hob 200 is installed in the driving hob mounting groove 110 through a driving hob elastic pressing block 120. When the driving hob 200 needs to be replaced, press the tail of the driving hob elastic pressing block 120 to make it pop out of the elastic pressing block clamping groove 210 on the driving hob 200, and then lift the driving hob 200 upward to perform the replacement.

[0027] The rotary servo motor 300 is installed at one end of the machine base 100. It drives the driving hob 200 to rotate through a belt transmission mechanism 700. The driving hob 200 is in frictional contact with the armature shaft 810, driving the armature shaft 810 to rotate.

[0028] The extrusion hob seat 400 is installed on the machine base 100 through a slide rail and slider mechanism 900, enabling the extrusion hob seat 400 to slide back and forth on the machine base 100. The extrusion hob seat 400 is realized by an extrusion servo motor 600 installed at the other end of the machine base 100. Specifically: the extrusion servo motor 600 drives the extrusion hob seat 400 to slide back and forth on the machine base 100 through a lead screw transmission mechanism 1000.

[0029] An extrusion hob mounting groove 410 is provided on the extrusion hob seat 400. The extrusion hob 500 is designed in a quick-release manner for quick replacement. That is, the extrusion hob 500 is installed in the extrusion hob mounting groove 410 through an extrusion hob elastic pressing block 420. When the extrusion hob 500 needs to be replaced, press the tail of the extrusion hob elastic pressing block 420 to make it pop out of the elastic pressing block clamping groove 510 on the extrusion hob 500, and then lift the extrusion hob 500 upward to perform the replacement.

[0030] Handles 220 and 520 are provided on both the driving hob 200 and the extrusion hob 500.

[0031] The extrusion servo motor 600 drives the extrusion hob seat 400 to move towards the armature shaft 810 through the lead screw transmission mechanism 1000, driving the extrusion hob 500 to radially extrude the armature shaft 810 and rotate and extrude along with the armature shaft 810 by friction, rolling out a groove, and using the groove edge to limit the bearing on the armature shaft 100.

Claims

1. An armature shaft roll riveting device, characterized in that, Comprising: A machine base; A driving hob arranged on the machine base, the driving hob being in frictional contact with the armature shaft to drive the armature shaft to rotate; A rotary servo motor mounted on the machine base, the rotary servo motor driving the driving hob to rotate; An extrusion hob seat slidably arranged on the machine base; An extrusion hob arranged on the extrusion hob seat; An extrusion servo motor mounted on the machine base, the extrusion servo motor driving the extrusion hob seat to move towards the armature shaft direction, driving the extrusion hob to radially extrude the armature shaft and rotate and extrude along with the armature shaft by friction force.

2. The armature shaft roll riveting device according to claim 1, characterized in that, The extrusion servo motor drives the extrusion hob seat to slide on the machine base through a screw rod transmission mechanism.

3. The armature shaft roll riveting device according to claim 1, wherein, The extrusion hob seat is mounted on the machine base through a slide rail and slider mechanism.

4. The armature shaft roll riveting device according to claim 1, characterized in that, The rotary servo motor drives the driving hob to rotate through a belt transmission mechanism.

5. A rolling riveting device for an armature shaft according to claim 1, characterized in that, A driving hob mounting groove is provided on the machine base, and the driving hob is mounted in the driving hob mounting groove through a driving hob elastic pressing block; an extrusion hob mounting groove is provided on the extrusion hob seat, and the extrusion hob is mounted in the extrusion hob mounting groove through an extrusion hob elastic pressing block.

6. The armature shaft roll riveting device according to claim 1, characterized in that, Handles are provided on both the driving hob and the extrusion hob.