A special tooling and assembly method for reverse installation of stator brush holder

Abstract

A special tooling and assembly method for reverse installation of a stator brush holder, comprising a base, a core column, a stator positioning device and an anti-error device, wherein the core column is perpendicular to the base and one end of the core column is fixedly connected to the center of the upper surface of the base, the end of the core column close to the base is adapted to the stator, and the end of the core column away from the base is adapted to the brush holder; the stator positioning device is fixedly arranged on the upper surface of the base for positioning the stator sleeved on the core column; the anti-error device is fixedly arranged on the side of the core column away from the base end to prevent the brush on the stator from being reversely installed in the brush holder. Compared with the prior art, the present invention can effectively prevent the brush electrode from being reversely installed through the anti-error device, thereby greatly improving the efficiency and quality of assembly of the motor stator and brush holder.

Description

Technical Field

[0001] The present invention relates to the technical field of assembling a stator and a brush holder, and in particular to a special tool for reversely assembling a stator brush holder and an assembly method. Background Art

[0002] Currently, when assembling a motor, the stator's positive brushes need to be installed into the brush holder's brush box to assemble the stator and brush holder. This existing motor assembly process is primarily performed manually. However, during manual assembly, since the positive brushes can be installed in the brush box in either direction, installing them the wrong way can quickly wear out the brushes and cause motor failure. This technical issue of reversed brush installation is extremely common, significantly reducing electronic assembly efficiency and compromising quality. Summary of the Invention

[0003] In response to the deficiencies in the prior art, the present invention provides a special tooling and assembly method for the reverse installation of a stator brush holder, which is used to solve the technical problem in the prior art that the stator brush is easily reversely installed in the brush box of the brush holder, and effectively improve the efficiency and quality of assembly of the motor stator and brush holder.

[0004] To achieve the above objectives, the present invention adopts the following technical solutions:

[0005] A special tool for reverse installation of a stator brush holder includes a base, a core column, a stator positioning device and an anti-error device. The core column is perpendicular to the base and one end of the core column is fixedly connected to the center of the upper surface of the base. The end of the core column close to the base is adapted to the stator, and the end of the core column away from the base is adapted to the brush holder; the stator positioning device is fixedly arranged on the upper surface of the base for positioning the stator sleeved on the core column; the anti-error device is fixedly arranged on the side of the core column away from the base to prevent the brush on the stator from being reversely installed in the brush holder.

[0006] Compared with the prior art, the present invention can effectively assemble the stator and the brush holder by fixing the stator and the brush holder on the base, and fixing the stator and the brush holder transversely to the base through the core column during fixing, and preventing the stator from axial rotation during assembly through the stator positioning device. At the same time, an error prevention device is provided on the core column. When the brush connected to the stator is installed in the brush box in the brush holder, the error prevention device can effectively prevent the brush electrodes from being installed reversely, thereby greatly improving the efficiency and quality of the assembly of the motor stator and brush holder.

[0007] On the other hand, an embodiment of the present invention further discloses an assembly method of a stator brush holder reverse installation tool, comprising the following steps:

[0008] 1) First, put the stator on the core column, adjust the stator position so that the stator positioning device is inserted into the gap between the stator inner coils to position the stator on the base;

[0009] 2) Sleeve the brush holder onto the end of the core column away from the base and make the side of the brush holder with the brush box face the stator;

[0010] 3) Install one of the stator's positive brushes into the corresponding brush box in the brush holder. If the brush is installed upside down, the brush wire will be blocked by the anti-error device and cannot be fully installed into the brush box. Adjust the direction of the brush and reinstall it into the brush box.

[0011] 4) Rotate the base in the direction of rotation of the one-way bearing and install the other positive brush of the stator into the corresponding brush box in the brush holder; repeat this step according to the number of brushes;

[0012] 5) Remove the assembled stator and brush holder from the core.

[0013] Compared with the prior art, firstly, the present invention can reduce the overall length of the motor and thus reduce the overall weight of the motor by reversely installing the brush holder on the stator; secondly, since the stator is in a circular shape, it is easy to rotate during installation. The present invention can more effectively assemble by fixing the stator and the brush holder on the base, preventing the stator from rotating during assembly and improving the efficiency of assembly; thirdly, the present invention provides an error-proofing device on the core column, which extends into one side of the brush box in the brush holder. Since the brush wire is eccentrically installed at one end of the brush, when the brush is installed reversely, the error-proofing device can hold the brush wire so that the brush cannot extend into the corresponding position in the brush box. Therefore, the operator can quickly determine that the brush is installed reversely and then perform the correct operation. Therefore, the above steps can effectively reduce the probability of reverse installation of the brush and improve the quality and efficiency of the assembly of the stator and brush holder. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the overall structure of an embodiment of the present invention.

[0015] Figure 2 It is a partial cross-sectional view of an embodiment of the present invention.

[0016] Figure 3 2 is a top view of an embodiment of the present invention.

[0017] Figure 4 Schematic diagram of the structure of the brush holder in an embodiment of the present invention.

[0018] Figure 5 Schematic diagram of the structure in which the stator is installed on the core column in an embodiment of the present invention.

[0019] Figure 6 This is a structural schematic diagram of an embodiment of the present invention in which the brush holder is installed on the core column above the stator.

[0020] Figure 7 This is a structural diagram of the brush being installed in the brush box of the brush holder in an embodiment of the present invention.

[0021] In the figure: base 1, core column 2, stator positioning section 2.1, brush holder positioning section 2.2, stepped surface 2.3, stator positioning device 3, error proofing device 4, error proofing clamp 4.1, brush holder positioning device 5, fixing seat 6, through hole 7, one-way bearing 8, mounting hole 9, connecting column 10, brush holder 11, brush box 11.2, spring 11.3, brush 12, brush wire 13. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to the accompanying drawings, and specific implementation methods will be given.

[0023] like Figure 1-7 As shown, according to an embodiment of the present invention, a special tool for reverse installation of a stator brush holder includes a base 1, a core column 2, a stator positioning device 3, and an anti-error device 4. The core column 2 is perpendicular to the base 1, and one end of the core column 2 is fixed to the center of the upper surface of the base 1. The end of the core column 2 close to the base 1 is a stator positioning section 2.1 adapted to the stator, and the end of the core column 2 away from the base 1 is a brush holder positioning section 2.2 adapted to the brush holder 11. The stator positioning device 3 is fixed to the upper surface of the base 1 for positioning the stator sleeved on the core column 2. The anti-error device 4 is fixed to the side of the end of the core column 2 away from the base 1 to prevent the stator brush 12 from being reversely installed in the brush holder 11. The present invention fixes the stator to the base 1 through the stator positioning section 2.1 on the core column 2 and the stator positioning device 3 on the base 1, and fixes the brush holder 11 above the stator through the brush holder positioning section 2.2 on the core column 2, so that the distance between the stator and the brush holder 11 is maintained constant. In this embodiment, two stator positioning devices 3 are provided and are located at both ends of the core column 2 respectively. The stator positioning device 3 can use positioning pins to adapt to the gaps between the windings in the stator, so that the structure in the stator can be effectively utilized to position the stator on the base 1.

[0024] like Figure 4 As shown, the brush holder 11 includes a mounting plate and a plurality of brush boxes 11.2 fixed above the mounting plate. A wound spring 11.3 is provided on one side of the brush box 11.2, and the free end of the spring 11.3 is bent in a direction opposite to its winding direction and extends into the brush box 11.2.

[0025] like Figure 1-3 As shown, in some embodiments of the present invention, the error-proofing devices 4 are provided in plurality and are fixed on the side of the end of the core column 2 away from the base 1 in a centrally symmetrical manner around the axis of the core column 2. In this embodiment, there are two error-proofing devices 4, and they are 180 degrees adjacent to each other. Furthermore, the error-proofing device 4 includes a fixed block, which is fixed on the side of the core column 2. The end of the fixed block away from the base 1 is provided with an error-proofing clamp 4.1 extending in the direction away from the core column 2. Figure 1As shown, there is a gap between the upper end of the fixed block and the core column 2, and the bottom of the fixed block is fixed on the core column 2. The shape and size of the anti-error clamp 4.1 are adapted to the gap in the brush holder 11 to ensure that the anti-error clamp 4.1 can be placed in the brush holder 11 and located on one side of the brush box 11.2.

[0026] In some embodiments of the present invention, the core column 2 is in a stepped column shape, and the radial dimension of the end of the core column 2 facing away from the base 1 is smaller than the radial dimension of the end connected to the base 1. The stepped column shape of the core column 2 can better fit the stator and the hole in the center of the brush holder 11.

[0027] In certain embodiments of the present invention, in order to position the brush holder 11 above the stator mounted on the stem 2, a brush holder positioning device 5 is provided at the end of the stem 2 facing away from the base 1 for positioning the brush holder 11 sleeved on the stem 2. Preferably, the brush holder positioning device 5 is a positioning pin having one end fixed to the stepped surface 2.3 of the stem 2 and the other end extending toward the free end of the stem 2. In this embodiment, two brush holder positioning devices 5 are provided and spaced apart from the two error-proofing devices 4. The two brush holder positioning devices 5 can fit neatly into the gap between adjacent brush boxes 11.2 and springs 11.3 on the brush holder 11, thereby achieving positioning of the brush holder 11.

[0028] In certain embodiments of the present invention, to enable unidirectional rotation of the base 1 after one brush 12 is installed in the brush box 11.2 of the brush holder 11, thereby facilitating installation of another brush 12, a fixing base 6 is further provided below the base 1. The bottom of the base 1 is rotatably connected to the top of the fixing base 6 via a one-way bearing 8. Specifically, a mounting hole 9 is provided at the center of the bottom of the base 1, which does not penetrate the base 1. A through hole 7 is provided at the center of the fixing base 6. The one-way bearing 8 is fixedly positioned within the through hole 7, i.e., the sidewall of the through hole 7 is fixedly connected to the outer ring of the one-way bearing 8. A connecting post 10 is fixedly positioned within the mounting hole 9. The other end of the connecting post 10 extends out of the mounting hole 9 and into the inner ring of the one-way bearing 8 within the fixing base 6, where it is fixedly connected to the sidewall. Therefore, the base 1 can be unidirectionally rotated relative to the fixing base 6 via the connecting post 10. After installing one brush 12, the base 1 can be rotated to facilitate installation of another brush 12. Several screw holes may also be provided within the fixing base 6, surrounding the through hole 7, for securing the fixing base 6 to other equipment.

[0029] like Figure 5-7 As shown, the embodiment of the present invention further discloses an assembly method of a stator brush holder reverse installation special tool according to the above, which specifically includes the following steps:

[0030] 1) If Figure 5 As shown, first, the stator is sleeved on the core column 2, and the position of the stator is adjusted so that the stator positioning device 3 is inserted into the gap between the stator inner windings to position the stator on the base 1;

[0031] 2) If Figure 6 As shown, the brush holder 11 is sleeved onto the end of the stem 2 facing away from the base 1, with the side of the brush holder 11 with the brush box 11.2 facing the stator. This step is used to reversely install the brush holder 11 on the stator to reduce the axial distance of the motor and thus reduce the weight of the entire machine. At this time, in order to position the brush holder 11, the brush holder positioning device 5 is inserted between the brush box 11.2 and the spring 11.3 on the brush holder 11 to prevent the brush holder 11 from rotating.

[0032] 3) If Figure 7 As shown, use the brush holder hook to push away the spring 11.3 in the brush box 11.2 so that one of the stator positive brushes 12 can be installed in the brush holder 11 and the corresponding brush box 11.2. If the brush 12 is installed upside down, the brush 12 line will be blocked by the error-proofing device 4 and cannot be fully installed in the brush box 11.2. Adjust the direction of the brush 12 and reinstall it in the brush box 11.2. In this step, the brush holder hook is an auxiliary device. The brush holder hook can be a hook with a hook head in the prior art. The brush holder hook is used to install the brush 12 in the brush box 11.2. Figure 4 The free end of the spring 11.3 located in the brush box 11.2 is hooked out from the brush box 11.2;

[0033] 4) Rotate the base 1 in the direction of rotation of the one-way bearing 8 and install the other stator positive brush 12 into the corresponding brush box 11.2 in the brush holder 11; repeat this step according to the number of brushes 12;

[0034] 5) Remove the assembled stator and brush holder 11 from the core column 2. In this embodiment, the structure of the brush holder 11 adopts the carbon brush holder of model 69-8301 in the prior art, so this structure is not described in detail in this application.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A special tool for reverse installation of stator brush holder, characterized by: It includes a base, a core column, a stator positioning device and an anti-error device, the core column is perpendicular to the base and one end of the core column is fixedly connected to the center of the upper surface of the base, the end of the core column close to the base is adapted to the stator, and the end of the core column away from the base is adapted to the brush holder; the stator positioning device is fixedly arranged on the upper surface of the base for positioning the stator sleeved on the core column; the anti-error device is fixedly arranged on the side of the core column away from the base to prevent the brush on the stator from being reversely installed in the brush holder, the anti-error device is provided with a plurality of and is respectively fixedly arranged on the side of the core column away from the base in a centrally symmetrical manner around the axis of the core column, the anti-error device includes a fixed block, the fixed block is fixedly arranged on the side of the core column, and the end of the fixed block away from the base is provided with an anti-error clamp extending in the direction away from the core column.

2. The special tooling for reverse installation of stator brush holder according to claim 1, characterized in that: The core column is in a stepped column shape, and the radial dimension of the end of the core column away from the base is smaller than the radial dimension of the end connected to the base.

3. The special tooling for reverse installation of stator brush holder according to claim 2, characterized in that: An electric brush holder positioning device for positioning the electric brush holder sleeved on the electric brush holder is also provided at one end of the electric brush holder away from the base.

4. The special tooling for reverse installation of stator brush holder according to claim 3, characterized in that: The brush holder positioning device is a positioning pin with one end fixed on the stepped surface of the stem and the other end extending toward the free end of the stem.

5. The special tooling for reverse installation of stator brush holder according to claim 1, characterized in that: A fixing seat is also provided below the base, and the bottom of the base is rotatably connected with the top of the fixing seat via a one-way bearing.

6. The assembly method of the special tooling for reverse installation of a stator brush holder according to claim 1, characterized in that: The steps include: 1) First, sleeve the stator onto the core column, adjust the stator position so that the stator positioning device is inserted into the gap between the stator inner coils to position the stator on the base; 2) Sleeve the brush holder on the end of the stem away from the base and make the side of the brush holder with the brush box face the stator; 3) Install one of the stator's positive brushes into the corresponding brush box in the brush holder. If the brush is installed upside down, the brush wire will be blocked by the error-proofing device and cannot be fully installed in the brush box. Adjust the direction of the brush and reinstall it in the brush box. 4) Turn the base and install the other positive brush of the stator into the corresponding brush box in the brush holder; repeat this step according to the number of brushes; 5) Remove the assembled stator and brush holder from the core column.

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