A DC motor armature end shaping device

Abstract

This invention discloses a DC motor armature end shaping device, comprising a base, a fixing ring, several pressure blocks, and a pressure sleeve. The pressure blocks are vertically oriented arc-shaped plates, with their outer diameter gradually decreasing towards the upper end along the vertically upward direction. During operation, the armature is vertically mounted on the base, and the pressure blocks are wrapped around its outer side. The fixing ring is then placed over the pressure blocks, and a circular groove on the lower surface of the pressure sleeve is inserted into the upper end of the pressure blocks. The protrusion in the center of the circular groove is inserted into the inner circle formed by the pressure blocks. A power device applies a downward load to the pressure sleeve, causing the upper ends of the pressure blocks to move closer together, compressing the outer circle of the armature end to be shaped. The protrusion of the pressure sleeve further compresses the height of the armature end to be shaped until the dimensions of the armature end meet the requirements. Loading is then stopped, and the armature is removed. This shaping device can simultaneously ensure both height and outer circle, without damaging the enamel coating of the wire, and also reduces labor intensity and improves product quality.

Description

Technical Field

[0001] This invention relates to a DC motor armature end shaping device. Background Technology

[0002] If the rear end of the armature core of a DC motor is irregularly sized and not shaped, two problems will occur: first, an excessively large outer diameter will cause interference with the stator during assembly, preventing the motor from rotating; second, an excessively large height will prevent the bearing from being installed. Therefore, an end-shaping device must be used to ensure that the outer diameter and height meet the design requirements.

[0003] There are two main types of shaping methods: one is completely manual shaping, which involves hammering with a rubber mallet. This method has low precision, high labor intensity, and cannot guarantee quality. The second method is to directly press the wire with a sleeve. This method can damage the enamel layer of the wire because there is moving friction between the inner hole of the sleeve and the enameled wire. Summary of the Invention

[0004] The purpose of this invention is to provide a DC motor armature end shaping device to solve the problems existing in the prior art.

[0005] The technical solution adopted to achieve the purpose of this invention is as follows: a DC motor armature end shaping device includes a base, a fixing ring, several pressure blocks and a pressure sleeve.

[0006] The pressure block is an arc-shaped plate with a vertical axis, and its outer diameter gradually decreases near its upper end along the vertical upward direction.

[0007] The lower surface of the pressure sleeve is provided with a circular groove for the upper ends of several pressure blocks to extend into. A cylindrical protrusion is provided in the center of the circular groove, and a hole for the end of the power supply armature to extend into is provided in the center of the protrusion.

[0008] The upper surface of the base has a groove for mounting the power supply hub end.

[0009] During operation, the armature is set vertically with the end to be shaped facing upwards. The lower end of the armature is installed in the groove of the base. Several pressure blocks are wrapped around the outside of the armature. A fixing ring is placed on the outer circle formed by the pressure blocks. The circular groove of the pressure sleeve is then embedded in the upper end of the pressure blocks. The inner wall of the circular groove of the pressure sleeve contacts the outer wall of each pressure block, which has a gradually changing outer diameter. The protrusion on the pressure sleeve is inserted into the inner circle formed by the pressure blocks. A power device is used to apply a downward load to the pressure sleeve. The upper ends of the pressure blocks move closer together to compress the outer circle of the end to be shaped of the armature. The protrusion of the pressure sleeve compresses the height of the end to be shaped of the armature downwards until the size of the end to be shaped of the armature meets the requirements. Then the loading is stopped and the armature is removed.

[0010] Furthermore, a stepped surface is provided at the junction of the outer wall with a gradually changing diameter and the outer wall with a constant diameter. During the process of the compression sleeve compressing the armature end to be shaped, the loading stops when the lower surface of the compression sleeve contacts the stepped surface of several compression blocks.

[0011] The technical advantages of this invention are undeniable. This shaping device can simultaneously ensure both height and outer diameter without damaging the enamel layer of the enameled wire, while also reducing labor intensity and improving product quality. Furthermore, this shaping mold has a simple structure, which not only improves product quality and yield rate, but also reduces production costs and shortens the product production cycle. Attached Figure Description

[0012] Figure 1 A schematic diagram of the armature to be shaped;

[0013] Figure 2 This is a schematic diagram of the device of the present invention in operation.

[0014] In the figure: base 101, fixing ring 102, pressure block 103, pressure sleeve 104 and armature 105. Detailed Implementation

[0015] The present invention will be further described below with reference to embodiments, but it should not be construed that the scope of the present invention is limited to the following embodiments. Various substitutions and modifications made based on ordinary technical knowledge and common practices in the art without departing from the above-described technical concept of the present invention should be included within the scope of protection of the present invention.

[0016] This embodiment discloses a DC motor armature end shaping device, including a base 101, a fixing ring 102, several pressure blocks 103 and a pressure sleeve 104.

[0017] The pressure block 103 is an arc-shaped plate with a vertical axis. Along the vertically upward direction, the outer diameter of the pressure block 103 gradually decreases near its upper end. A stepped surface is provided at the junction of the outer wall with the gradually decreasing diameter and the outer wall with the constant diameter of the pressure block 103.

[0018] The lower surface of the pressure sleeve 104 is provided with a circular groove for the upper ends of several pressure blocks 103 to extend into. A cylindrical protrusion is provided in the center of the circular groove, and a hole for the end of the power supply armature 105 to extend into is provided in the center of the protrusion.

[0019] The upper surface of the base 101 has a groove for mounting the end of the power supply hub 105. Figure 1 This is a schematic diagram of the armature 105, where end A is the end to be shaped.

[0020] See Figure 2During operation, the armature 105 is set vertically with the end of the armature 105 to be shaped facing upwards. The lower end of the armature 105 is installed in the groove of the base 101. Several pressure blocks 103 are used to wrap the outside of the armature 105. In this embodiment, three pressure blocks 103 are used to wrap the armature 105, and the angle of each pressure block 103 is 120°. A retaining ring 102 is fitted onto the outer circle formed by several pressing blocks 103 to prevent the pressing blocks 103 from moving outward during the shaping process. Then, the circular groove of the pressing sleeve 104 is embedded in the upper end of the pressing blocks 103. The inner wall of the circular groove of the pressing sleeve 104 contacts the outer wall of each pressing block 103, which has a gradually changing outer diameter. The protrusion on the pressing sleeve 104 is inserted into the inner circle formed by the pressing blocks 103. A downward load is applied to the pressing sleeve 104 using a power device. The upper ends of the pressing blocks 103 move closer together, compressing the outer circle of the armature 105 to be shaped. The protrusion of the pressing sleeve 104 compresses the height of the armature 105 to be shaped. Loading stops when the lower surface of the pressing sleeve 104 contacts the stepped surface of the pressing blocks 103, and the armature 105 is removed. The power device is a hydraulic press or a pneumatic device. The dimensions of the base 101, fixing ring 102, pressure block 103 and pressure sleeve 104 are customized in advance according to the shaping requirements of the armature 105, so as to ensure that the shaping result of the armature 105 meets the requirements when the lower surface of the pressure sleeve 104 contacts the stepped surface of several pressure blocks 103.

[0021] It is worth noting that this shaping device can simultaneously ensure both height and outer diameter without damaging the enamel layer of the enameled wire, while also reducing labor intensity and improving product quality. In summary, this shaping mold has the advantages of simple structure, improved product quality and yield, reduced production costs, and shortened product production cycle.

Claims

1. A device for shaping the end of a DC motor armature, characterized by: The application relates to a motor armature shaping device which comprises a base (101), a fixing ring (102), a plurality of pressing blocks (103) and a pressing sleeve (104). The pressing block (103) is an axis-vertical arc-shaped plate, and the outer diameter of the pressing block (103) gradually decreases in the vertical upward direction close to the upper end. The lower surface of the pressing sleeve (104) is provided with a circular groove for the upper end of the pressing block (103) to extend into, and a cylindrical protrusion is arranged at the center of the circular groove, and a hole is arranged at the center of the protrusion for the end of the electric armature (105) to extend into. The upper surface of the base (101) is provided with a groove for the end of the electric armature (105) to be mounted. During operation, the electric armature (105) is vertically arranged with the end to be shaped upward, the lower end of the electric armature (105) is mounted into the groove of the base (101), the pressing blocks (103) are wrapped outside the electric armature (105), the fixing ring (102) is sleeved on the outer circle surrounded by the pressing blocks (103), the circular groove of the pressing sleeve (104) is embedded on the upper end of the pressing blocks (103), the inner wall of the circular groove of the pressing sleeve (104) is in contact with the outer wall of each pressing block (103) with gradually-changing diameter, the protrusion on the pressing sleeve (104) is inserted into the inner circle surrounded by the pressing blocks (103), a downward load is applied to the pressing sleeve (104) by a power device, the upper ends of the pressing blocks (103) are close to each other to compress the outer circle of the end of the electric armature (105) to be shaped, the protrusion of the pressing sleeve (104) compresses the height of the end of the electric armature (105) to be shaped, and the loading is stopped until the size of the end of the electric armature (105) to be shaped meets the requirements, and then the electric armature (105) is taken out; the step surface is arranged at the joint of the outer wall with gradually-changing diameter and the outer wall with constant diameter of the pressing block (103), and the loading is stopped when the lower surface of the pressing sleeve (104) is in contact with the step surface of the pressing blocks (103) during the compression of the end of the electric armature (105) to be shaped by the pressing sleeve (104).

Images