Pin type motor lead protection structure

Abstract

The utility model discloses a kind of pin type motor lead protection structure, including shell, coil unit, pin and line plug, the coil unit is located in shell, pin is located on coil unit, line plug and pin are mutually inserted, still include protection seat, protection seat is inserted on shell, protection seat is used to limit the pull-out direction of line plug.The utility model is through the double protection structure of " protection seat limit+ end cap positioning", solve the easy to loosen problem caused by the line plug in prior art only rely on elastic metal sheet clamping force.Line plug is fixed in circumference by the insertion of protection seat and shell mounting slot, and is limited in pull-out direction by limiting cavity;End cap avoids protection seat displacement by axial positioning, and both synergistic effect makes line plug always maintain reliable connection with pin under the action of motor continuous vibration, external cable drag or impact load, effectively prevent power interruption or control malfunction and other faults.

Description

Technical Field

[0001] This utility model relates to a pin-type motor lead protection structure. Background Technology

[0002] As a common drive device, the reliability of the electrical connection of a pin-type motor directly affects the overall operational stability. In existing structures, the motor's coil winding leads typically transmit current by connecting the male end of a pin to the female end of an external connector. This connection method offers advantages such as convenient assembly and ease of automated production. However, in this connector structure, the connection between the connector and the pin relies solely on the clamping force of the elastic metal plate at the female end. Under continuous motor vibration, external cable dragging, or impact loads, the connector may loosen along the pin's axial direction, or even completely detach in more severe cases, causing power outages or momentary power failures, leading to equipment shutdowns, control malfunctions, and other faults. Summary of the Invention

[0003] This utility model provides a pin-type motor lead protection structure to solve the problems existing in the prior art.

[0004] The technical solutions adopted in this utility model are as follows: A pin-type motor lead protection structure includes a housing, a coil unit, pins, and a plug. The coil unit is located inside the housing, the pins are located on the coil unit, and the plug is inserted into the pins. The structure also includes a protective seat, which is inserted into the housing and is used to limit the pull-out direction of the plug.

[0005] Furthermore, the outer wall of the housing is provided with a mounting groove arranged along the axial direction of the housing, and slots are provided at both ends of the protective seat, with the slots and the groove walls of the mounting grooves interlocking with each other.

[0006] Furthermore, the bottom end of the protective seat is provided with a limiting cavity, and after the protective seat is inserted into the mounting groove, the wire plug is placed in the limiting cavity.

[0007] Furthermore, an end cap is fixed to the housing, which axially positions the protective seat on the housing.

[0008] Furthermore, the coil unit includes two coil frames, each of which is provided with a pin.

[0009] This utility model has the following beneficial effects: This invention solves the problem of easy loosening caused by the plug relying solely on the clamping force of an elastic metal sheet in existing technologies through a dual protection structure of "protective seat limiting + end cap positioning". The protective seat achieves circumferential fixation by inserting a slot into the housing mounting groove, and limits the pull-out direction of the plug through the limiting cavity; the end cap prevents the protective seat from shifting through axial positioning. The two work together to ensure that the plug maintains a reliable connection with the pins under continuous motor vibration, external cable dragging, or impact loads, effectively preventing power outages or control failures. Attached Figure Description

[0010] Figure 1 This is a structural diagram of the present utility model.

[0011] Figure 2 The diagram shows the structure of the plug, with the protective base moved upwards a certain distance to expose it.

[0012] Figure 3 This is a structural diagram of the protective base.

[0013] Figure 4 This is a structural diagram of the protective base.

[0014] Figure 5 This is a structural diagram of a coil unit. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] like Figures 1 to 5 The new pin-type motor lead protection structure achieves anti-loosening and limiting of the plug 4 by adding a protective seat 5. The overall assembly follows the sequence of "internal component fixing → electrical connection → protective structure installation → axial positioning". The components fit together tightly and are easy to assemble, and can be assembled without complicated tools.

[0017] Coil unit 2 consists of two independent coil frames 21, each with a pin 3 mounted on it. The number and specifications of the pins 3 are designed to match the power supply requirements of the motor. Magnets, rotors, and other components are installed inside coil unit 2.

[0018] Two coil frames 21 are fixed inside the housing 1 to ensure that the free end of the pin 3 extends radially outward along the housing 1 and that the exposed part of the pin 3 remains straight, providing accurate positioning for subsequent insertion with the wire plug 4.

[0019] Align the female end of the external connector 4 with the male end of the pin 3 on the outside of the housing 1, and apply pressure along the axial direction of the pin 3 to complete the connection. At this time, the connector 4 forms an electrical connection with the pin 3 through the internal elastic metal sheet, realizing the transmission of current.

[0020] A mounting groove extending axially along the outer wall of the housing 1 is pre-machined, and the width of the mounting groove matches the width of the slots 51 at both ends of the protective seat 5. During assembly, the protective seat 5 is slid along the axial direction of the housing 1, so that the slots 51 at both ends of the protective seat 5 form an insertion fit with the side walls of the mounting groove until the protective seat 5 slides to the preset position. This insertion structure requires no additional fasteners, has high assembly efficiency, and provides stable positioning.

[0021] The bottom end of the protective base 5 is recessed inward to form a limiting cavity 52, the inner shape of which matches the outer contour of the plug 4. When the protective base 5 slides to the preset assembly position, the plug 4 is completely accommodated in the limiting cavity 52, and the axial end face of the limiting cavity 52 is in contact with the tail end face of the plug 4. At this time, if the plug 4 is subjected to an external force along the direction of the pin 3 pull-out, such as cable dragging or motor vibration, the axial end face of the limiting cavity 52 will form a hard block, directly restricting the axial displacement of the plug 4 and preventing it from loosening or detaching along the direction of the pin 3.

[0022] After the protective seat 5 is assembled, the end cap is fixed to the end of the housing 1 by means of bolt connection, snap-fit, or welding. The inner end face of the end cap fits tightly with the top end face of the protective seat 5, forming an axial limit to prevent the protective seat 5 from shifting axially along the mounting groove during motor operation vibration, ensuring that the protective seat 5 always maintains an effective limiting effect on the plug 4. At the same time, the end cap also protects the insertion part between the protective seat 5 and the housing 1, preventing dust and impurities from entering and affecting the fitting accuracy.

[0023] This invention solves the problem of easy loosening of the plug 4 caused by the existing technology relying solely on the clamping force of the elastic metal sheet through a dual protection structure of "protective seat 5 limiting + end cover positioning". The protective seat 5 achieves circumferential fixation by inserting the slot 51 into the mounting groove of the housing 1, and limits the pull-out direction of the plug 4 through the limiting cavity 52; the end cover prevents the protective seat 5 from shifting through axial positioning. The two work together to ensure that the plug 4 always maintains a reliable connection with the pin 3 under the continuous vibration of the motor, external cable dragging or impact load, effectively preventing power interruption or control failure.

[0024] During disassembly, first remove the end cover, then slide the protective seat 5 in the opposite direction along the axis of the housing 1 to disengage it from the mounting slot and expose the wire plug 4. Then the wire plug 4 can be pulled out normally for inspection or replacement. During reassembly, simply follow the reverse order above. The entire process does not require damaging any parts, making maintenance very convenient.

[0025] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A pin-type motor lead protection structure, comprising a housing (1), a coil unit (2), a pin (3), and a plug (4), wherein the coil unit is disposed inside the housing (1), the pin (3) is disposed on the coil unit (2), and the plug (4) is inserted into the pin (3), characterized in that: It also includes a protective seat (5), which is inserted into the housing (1) and is used to limit the pull-out direction of the wire plug (4).

2. The pin-type motor lead protection structure as described in claim 1, characterized in that: The outer wall of the housing (1) is provided with an installation groove arranged along the axial direction of the housing (1), and slots (51) are provided at both ends of the protective seat (5), and the slots (51) are inserted into the groove wall of the installation groove.

3. The pin-type motor lead protection structure as described in claim 2, characterized in that: The bottom end of the protective seat (5) is provided with a limiting cavity (52). After the protective seat (5) is inserted into the mounting groove, the wire plug (4) is placed in the limiting cavity (52).

4. The pin-type motor lead protection structure as described in claim 1, characterized in that: An end cap is fixed on the housing (1), and the end cap axially positions the protective seat (5) on the housing (1).

5. The pin-type motor lead protection structure as described in claim 1, characterized in that: The coil unit (2) includes two coil frames (21), each of which is provided with a pin (3).

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