Device for extracting motor stator coils and method for extracting coils

Abstract

The application relates to a device for guiding the taking-out of a motor stator coil and a coil taking-out method, which comprises a base, a transmission screw rod, a moving disc and a grab hook; the transmission screw rod is connected with the inner thread of the moving disc through the outer thread in the middle part, the lower end of the transmission screw rod is gap-inserted with the lower small hole on the base, the moving disc is gap-inserted with the upper large hole on the base through the lower cylindrical part in a movable way along the axial direction and a limited way along the circumferential direction, a plurality of grab hooks are evenly inserted into the long slot holes on the moving disc through the respective guide columns, and the lower limit cooperation is formed through the contact between the lower end of the moving disc and the limiting blocks; during the taking-out of the stator coil, the base is supported on the upper middle part of the stator sleeve, the L-shaped body part of the plurality of grab hooks is inserted into the lower part of the stator coil through the gap between the coil side and the wall surface of the end surface slot of the stator sleeve, and the hook heads of the plurality of grab hooks are rotated to the position of forming the supporting contact with the lower end of the stator coil. The application realizes the lossless and fast taking-out of the coil.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of special guide motor machining, and particularly relates to a device for taking out a stator coil of a guide motor and a coil taking-out method. BACKGROUND

[0002] The guide motor is composed of a stator and a rotor, and the stator assembly is composed of a coil assembly 102 and a stator sleeve 101. The coil is built in the end face groove of the stator sleeve, and its position in the groove is limited by 2-4 limiting blocks. The coil profile is lower than the limiting blocks 103, and the gap between the coil and the inner and outer walls and the bottom surface of the end face groove is 1 mm (as shown in FIG. 1). Figure 1 After testing, some coil assemblies need to be removed from the stator sleeve for re-adjustment. Because the gap between the coil and the end face groove of the stator sleeve is too small, the following shortcomings exist when the coil assembly is removed:

[0003] 1. The effect of removing the coil assembly by knocking the bottom of the stator sleeve is not obvious, and the coil assembly is easy to be skewed and stuck.

[0004] 2. Using a tool to pry the coil assembly will damage the surface of the coil, resulting in coil scrap.

[0005] 3. The coil assembly is removed entirely by hand, which requires high skills of personnel and has low production efficiency. SUMMARY

[0006] The present application aims to overcome the shortcomings of the prior art, and provide a device for taking out a stator coil of a guide motor and a taking-out method, which can better protect the integrity of the parts and greatly improve the disassembly efficiency.

[0007] One of the above-mentioned purposes of the present application is achieved by the following technical scheme:

[0008] A device for taking out a stator coil of a guide motor, comprising a base, a transmission screw, a movable chuck and a grab hook.

[0009] The base is in the shape of a cylinder as a whole, and the central hole of the base is composed of a lower small hole and an upper large hole. The lower small hole is a transmission screw positioning hole, and the upper large hole is a chuck guide hole. The transmission screw is in the shape of a cylinder as a whole, and comprises an upper end, a lower end and an intermediate main body part. The intermediate main body part is provided with external threads, the upper end is a force applying end, and the lower end is a positioning cylindrical structure. The movable chuck is composed of an upper disc and a lower cylindrical body arranged coaxially. The upper disc is uniformly provided with a plurality of long slot holes arranged in the radial direction, and an internally threaded through hole is arranged at the center of the movable chuck. The grab hook is composed of a limiting block, a guide column and an L-shaped structure arranged in sequence from top to bottom.

[0010] The transmission screw is connected with the inner thread of the mobile disc through the outer thread in the middle part, and the lower end of the transmission screw is inserted into the lower hole of the base in a clearance fit; the mobile disc is inserted into the upper large hole of the base in an axial movable and circumferential limited manner through the lower cylindrical part; the plurality of hooks are inserted into the long slot holes of the mobile disc through the respective guide columns in a uniform manner, and the lower end of the mobile disc is in contact with the limiting block to form a lower limiting fit;

[0011] During the stator coil extraction process, the base is supported on the middle part of the upper end of the stator sleeve, the L-shaped body part of the plurality of hooks is inserted into the lower part of the stator coil through the gap between the coil side and the wall surface of the stator sleeve end surface slot, and the hook head of the plurality of hooks is rotated to the position of supporting contact with the lower end of the stator coil.

[0012] Moreover, a guide pin hole is arranged on the side wall of the base corresponding to the position of the large hole, and a guide pin is inserted into the guide pin hole and extends into the large hole of the base; a guide groove is arranged on the lower cylindrical surface of the mobile disc in the axial direction, and the guide groove and the guide pin form an axial direction guide fit.

[0013] Moreover, a radial circular hole is arranged on the upper end for mounting the driving rod.

[0014] Moreover, the outer thread on the middle main part of the transmission screw adopts a small pitch thread.

[0015] The second purpose of the present application is achieved by the following technical scheme:

[0016] A stator coil extraction method using the above-mentioned extraction device suitable for guiding the stator coil of the motor, comprising the following steps:

[0017] Step 1, first place the stator on a stable table surface and fix it, and place the base in the middle part of the stator;

[0018] Step 2, rotate the transmission screw into the middle inner thread hole of the disc, then align the guide groove on the mobile disc with the guide pin on the base, insert the lower end of the transmission screw into the lower hole of the base, and make the lower cylindrical part of the mobile disc and the upper large hole of the base form a clearance fit;

[0019] Step 3, the plurality of hooks are evenly inserted into the plurality of long slot holes on the mobile disc, according to the size of the coil, the radial position of the hook is adjusted, after being adjusted to the appropriate position, the lower hook head of the L-shaped structure part is located in the position perpendicular to the radial direction of the coil, the hook is sent down through the gap between the coil side and the wall surface of the stator sleeve end surface slot, the lower hook head of the L-shaped structure part is extended into the position below the coil assembly, then the hook is rotated to point to the center direction, the hook head can hold the lower end of the coil, finally the transmission screw is stably rotated, the mobile disc carries the hook to stably rise, and the coil assembly is unloaded.

[0020] The present application has the advantages and positive effects that:

[0021] 1, the present application utilizes the lower end hook to extend to the bottom of the coil assembly and hold the coil assembly, utilizes the transmission screw to unload it, adheres to the principle of not damaging the integrity of the parts and improving the dismounting efficiency, improves the processing efficiency, and reduces the operation requirements for personnel.

[0022] 2, the mobile end of the present application adopts the disc design, the disc surface is evenly distributed with long slot holes, the hook can move along the radial direction in the slot, different number of limiting blocks and different sizes of stators can be compatible, and the present application has strong universality;

[0023] 3, the moving mode of the present application adopts the small pitch transmission screw cooperating with the guide groove to move, the movement is stable and reliable, the coil assembly can keep balance when being taken out, and the dismounting quality of the coil assembly is ensured;

[0024] 3, the present application is simple in operation, has no high requirement for the operation technology of the workshop workers, has wide application range, and is high in efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the structure schematic view of the guide motor stator assembly involved in the present application;

[0026] Figure 2 It is the structure schematic view of the base in the taking-out device of the present application;

[0027] Figure 3 It is the structure schematic view of the transmission screw in the taking-out device of the present application;

[0028] Figure 4 It is the structure schematic view of the mobile disc in the taking-out device of the present application

[0029] Figure 5 It is the structure schematic view of the hook in the taking-out device of the present application;

[0030] Figure 6 It is the use state reference view of the base of the present application placed on the upper end of the stator assembly;

[0031] Figure 7is the use state reference drawing of the base, transmission screw rod and moving disc installed on the stator assembly of the present application;

[0032] Figure 8 is the state reference drawing of the coil taking device in the initial stage of taking the coil of the present application;

[0033] Figure 9 is the state reference drawing of the coil taking device after taking the coil of the present application. DETAILED DESCRIPTION

[0034] The structure of the present application will be further described below in combination with the drawings and by examples. It should be noted that the examples are narrative rather than limiting.

[0035] A coil taking device for guiding the motor stator coil, please see Figures 1-9 The invention point is: mainly including base 1, transmission screw rod 2, moving disc 3 and grab hook 4.

[0036] Base:

[0037] As shown in Figure 2 , the whole is cylindrical, the outer diameter is smaller than the inner circle diameter of the end face groove of the stator sleeve, and larger than the inner hole diameter of the stator sleeve, so as to support the center position of the stator sleeve and not affect the taking of the coil. The center hole is provided on the base, which is composed of lower small hole 1.1 and upper large hole 1.2. The lower small hole is the transmission screw rod positioning hole, and the upper large hole is the disc guiding hole, so that the disc moves along the axis under the action of the transmission screw rod. The guide pin hole is provided on the side wall of the base corresponding to the position of the large hole, and the guide pin 1.3 extending into the large hole of the base is inserted into the guide pin hole, which is used to limit the rotation of the disc when moving along the axial direction.

[0038] Transmission screw rod

[0039] Figure 3 As shown in the figure, the whole is cylindrical. It includes upper end head 2.1, lower end head 2.4 and middle body part 2.3. The middle body part is provided with small pitch thread, which can make the moving disc above move stably during the work of the device. The upper end head is the force applying end for driving the transmission screw rod to rotate. In order to simplify the rotary torque, radial circular hole 2.2 is provided on the upper end head, which can be placed into the driving rod with matching size, so as to make the use more convenient and labor-saving. The lower end head is the positioning cylinder, which can be positioned with the transmission screw rod positioning hole of the base with clearance fit.

[0040] Moving disc

[0041] Figure 4As shown, it consists of two coaxially arranged parts: an upper disc 3.3 and a lower cylinder 3.4. The upper disc has multiple radially arranged elongated slots 3.1 evenly distributed along its circumference, which can unidirectionally limit the movement of the gripper hook along its axis. This design can adapt to the size of the coil and the number of coil pads. An internally threaded through-hole 3.2 is located at the center of the moving disc, and the internal thread can cooperate with the transmission screw to achieve its vertical movement. A guide groove 3.5 is provided axially on the surface of the lower cylinder, which can cooperate with and be fixed to a guide pin on the base, allowing it to move only vertically without participating in the screw rotation.

[0042] grapple

[0043] Figure 5 As shown, the structure consists of a limiting block 4.1, a guide post 4.2, and an L-shaped component 4.3 connected sequentially from top to bottom. In this invention, the limiting block is preferably a square block. Due to the need for gripping in a confined space, the L-shaped component is designed to be slender, and its cross-sectional dimension needs to be slightly smaller than the gap between the coil and the end face groove. The guide post in the middle part is inserted into the elongated slot on the movable disc, allowing the gripper hook to move radially along the disc and rotate. When the gripper hook rotates 90° and hooks the lower part of the coil, the limiting block and the disc form a lower limit, ensuring that the gripper hook moves upward along with the disc to grip the coil.

[0044] The specific steps of the extraction method based on the above-described extraction device for the stator coil of the guiding motor are as follows:

[0045] Step 1: First, place the stator assembly (including coil assembly 102 and stator sleeve 101) on a stable table and fix it in place. Place the base in the middle of the stator, such as... Figure 6 As shown;

[0046] Step 2: Screw the drive screw into the internal threaded through hole in the center of the faceplate. Then, align the guide groove on the faceplate with the guide pin on the base. Insert the lower end of the drive screw into the lower hole on the base, so that the lower cylinder of the moving faceplate forms a clearance fitting with the upper large hole of the base. Figure 7 As shown.

[0047] Step 3: After completing the above operations, evenly insert multiple hooks into the multiple long slots on the movable disc. Adjust the radial position of the hooks according to the size of the coil. After adjusting to a suitable position, with the lower hook head of the L-shaped component perpendicular to the radial direction of the coil, lower the hook through the gap between the side of the coil and the wall of the stator sleeve end face slot, so that the lower hook head of the L-shaped component extends into the bottom of the coil assembly. Figure 8 As shown, rotating the grab hook so that the hook head points towards the center allows the hook head to support the lower end of the coil. Smoothly rotating the transmission screw moves the moving disc, carrying the grab hook, to a steady rise, thereby removing the coil assembly (as shown).Figure 9 as shown.

[0048] Although embodiments of the present application and the accompanying drawings disclose the present application for illustrative purposes, those skilled in the art can understand that various substitutions, changes and modifications are possible without departing from the spirit of the present application and the appended claims, and therefore the scope of the present application is not limited to the disclosed embodiments and drawings.

Claims

1. A retrieval device suitable for use in guiding a stator coil of an electric machine, characterized in that: The device comprises a base, a transmission screw, a mobile disc and a grab hook. The base is in the shape of a cylinder, and the central hole of the base is composed of a lower small hole and an upper large hole. The lower small hole is a transmission screw positioning hole, and the upper large hole is a disc guiding hole. The transmission screw is in the shape of a cylinder, and comprises an upper end, a lower end and a middle body. The middle body is provided with external threads, the upper end is a force applying end, and the lower end is a positioning cylinder structure. The mobile disc is composed of an upper disc and a lower cylinder which are coaxially arranged. The upper disc is provided with a plurality of long slot holes which are evenly distributed in the circumferential direction and are arranged in the radial direction. The mobile disc is provided with an internal thread through hole in the center. The grab hook is composed of a limiting block, a guiding column and an L-shaped structure which are connected in sequence. The transmission screw is connected with the internal thread through hole of the mobile disc through the middle external threads. The lower end of the transmission screw is gap inserted and matched with the lower small hole of the base. The mobile disc is gap inserted and matched with the upper large hole of the base through the lower cylinder in the axial direction and is limited in the circumferential direction. The base is provided with a guiding pin hole at the position corresponding to the large hole in the side wall. A guiding pin is inserted into the guiding pin hole and extends into the large hole of the base. The lower cylinder surface of the mobile disc is provided with a guiding groove in the axial direction. The guiding groove is guided in the axial direction with the guiding pin. In the process of taking out the stator coil, the base is supported on the middle part of the upper end of the stator sleeve. The L-shaped structure of the grab hook is inserted into the lower part of the stator coil through the gap between the side edge of the coil and the wall surface of the end surface groove of the stator sleeve. The hook head of the grab hook is rotated to the position of supporting contact with the lower end of the stator coil.

2. The extraction device suitable for guiding the stator coil of the electric machine according to claim 1, characterized in that: A radial circular hole is arranged on the upper end of the transmission screw for installing a driving rod.

3. The extraction device suitable for guiding the stator coil of the electric machine according to claim 1, characterized in that: The external threads on the middle body of the transmission screw are small pitch threads.

4. A coil extraction method using the extraction device for guiding a stator coil of an electric motor according to claim 1, characterized by, The device comprises the following steps: Step 1: First, fix the stator on a stable table top, and place the base in the middle part of the stator. Step 2: Rotate the transmission screw into the internal thread through hole in the middle part of the disc, then align the guiding groove of the mobile disc with the guiding pin of the base, and insert the lower end of the transmission screw into the lower hole of the base, so that the lower cylinder of the mobile disc is gap inserted and matched with the upper large hole of the base. Step 3: Insert the grab hook into the long slot hole of the mobile disc. According to the size of the coil, adjust the radial position of the grab hook. When the lower hook head of the L-shaped structure is in the radial direction perpendicular to the coil, insert the grab hook into the lower part of the coil assembly through the gap between the side edge of the coil and the wall surface of the end surface groove of the stator sleeve. Then rotate the grab hook to point to the center direction, so that the hook head can support the lower end of the coil. Finally, rotate the transmission screw stably, and the mobile disc with the grab hook is lifted steadily to remove the coil assembly.

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