Motor debugging device

Abstract

The utility model belongs to the technical field of motor assembly, and relates to a motor debugging device. Comprising a rotor, a stator, a printed circuit board assembly, a shell, a base, a first bearing, a second bearing, a cover plate and a positioning pin, one end of the rotor is mounted on a center hole of the base through a first bearing; a positioning pin is further arranged on the base, a groove matched with the positioning pin is formed in the side face of the shell, the shell is arranged on the rotor in a sleeving mode, and positioning is achieved through the groove in the side face of the shell; the stator is pressed in a cavity between the shell and the rotor along the rotor; the inner side of the cover plate is provided with a positioning ring groove for installing the printed circuit board assembly, the printed circuit board assembly is fixed in the positioning ring groove of the cover plate, and then the cover plate is fixed at the end part of the shell; and a second bearing matched with the other end of the rotor is arranged in a center hole of the cover plate. The device provided by the utility model can effectively guarantee the installation position of the motor printed circuit board, and remarkably improves the assembling and debugging efficiency at the same time.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor assembly and relates to a motor debugging device. Background Art

[0002] With the rapid development of mechatronics technology, the existing brushless DC motor consists of a motor main body, a driver, a printed circuit board assembly, etc., and is a typical mechatronic product. Generally, the motor main body and electrical components are manufactured separately and then assembled into one body. During assembly, the printed circuit board assembly (sensor assembly) is adhesively fixed to the motor stator at a suitable position; the installation position of the printed circuit board assembly will affect the position signal of the rotor, resulting in the advance or lag of the stator winding commutation, and ultimately affecting performance parameters such as the motor current and speed. The installation position of the printed circuit board assembly is uncertain during the motor production process. In order to achieve the optimal performance, the position of the printed circuit board assembly usually needs to be adjusted repeatedly.

[0003] Currently, during the assembly of brushless DC motors, generally, the printed circuit board assembly is assembled synchronously while pressing the bearings and end covers of the permanent magnet servo motor. Conventional assembly is difficult to ensure the position accuracy of the printed circuit board, and the printed circuit board is installed inside the motor housing. Usually, the position of the printed circuit board needs to be debugged repeatedly. Inside the motor structure, due to the large accessory structure, debugging is inconvenient, which seriously restricts the production efficiency of brushless motors. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a motor debugging device to achieve the accurate installation of the printed circuit board assembly and improve the motor assembly and debugging efficiency.

[0005] Technical Solution: To achieve the above purpose, the technical solution adopted by the utility model is: a motor debugging device, including a rotor, a stator, a printed circuit board assembly, a housing, a base, a first bearing, a second bearing, a cover plate, and a positioning pin;

[0006] One end of the rotor is installed on the central hole of the base through the first bearing; a positioning pin is also arranged on the base, and a groove matching the positioning pin is arranged on the side of the housing. The housing is sleeved on the rotor, and positioning is achieved by using the groove on the side of the housing; the stator is pressed along the rotor into the cavity between the housing and the rotor; a positioning ring groove for installing the printed circuit board assembly is opened on the inner side of the cover plate, the printed circuit board assembly is fixed in the positioning ring groove of the cover plate, and then the cover plate is fixed to the end of the housing; a second bearing matching the other end of the rotor is arranged in the central hole of the cover plate.

[0007] Further, the upper end of the housing is provided with a stepped structure, and the cover plate matches the stepped structure and is fixed to the end of the housing.

[0008] Further, a stepped counterbore is provided inside the cover plate, and the larger-diameter outer peripheral table surface is fixedly fitted with the end of the housing.

[0009] Further, kidney-shaped holes are formed in the larger-diameter outer peripheral table surface inside the cover plate, and bolt holes are formed corresponding to the end of the housing. The cover plate and the housing are fixed by bolts.

[0010] Further, a through hole is formed in the smaller-diameter table surface in the stepped counterbore inside the cover plate, serving as a cable passing hole for the printed circuit board assembly.

[0011] Further, a counterbore is formed at the center of the bottom of the base, and an end cover is installed in the counterbore to realize the limit protection of the rotor end.

[0012] Technical effect: The motor debugging device designed by the present utility model, through the coaxial matching relationship of the base, the housing, and the end cover, first fixes and limits the motor rotor, and then, taking the motor rotor as a reference, assists in the installation and fixation of the motor stator and the end cover that pre-fixes the printed circuit board by limiting the housing. The overall assembly can be completed in one go, ensuring the installation position of the motor printed circuit board and the installation accuracy; on the debugging device designed by the present utility model, fine adjustment of the printed circuit board can be achieved. After determining the final position, it is fixed by gluing. Finally, the stator assembly with the printed circuit board installed is integrally installed into the motor housing, and the final assembly and debugging can be realized, which can greatly improve the debugging efficiency. Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of the present utility model;

[0014] Among them, 1 - end cover, 2 - rotor, 3 - printed circuit board assembly, 4 - stator, 5 - housing, 6 - base, 7 - first bearing, 8 - positioning pin, 9 - second bearing, 10 - cover plate. Detailed Embodiment

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present utility model belong to the scope of protection of the present utility model.

[0016] As Figure 1 shown, a motor debugging device specifically designed by the present utility model includes an end cover 1, a rotor 2, a printed circuit board assembly 3, a stator 4, a housing 5, a base 6, a first bearing 7, a positioning pin 8, and a second bearing 9;

[0017] In the motor proposed by the present utility model, permanent magnets are pre-pasted around the motor rotor 2; then one end of the rotor 2 is installed on the central hole of the base 6 through a first bearing 7; a positioning pin 8 is also provided on the base 6, and a groove matching the positioning pin 8 is provided on the side of the housing 5. The housing 5 is sleeved on the rotor 2 and positioned by using the groove on the side of the housing 5; for accurate and stable positioning, generally, the positioning pins 8 are symmetrically arranged on the base 6, and when necessary, the number of positioning pins 8 can also be increased. For example, a form of circumferentially arranging three positioning pins can also be used for positioning.

[0018] In this embodiment, since both the housing 5 and the rotor 2 are coaxially defined on the base 6, while the positions of the rotor 1 and the housing 5 are fixed, the cavity between the two is also synchronously defined, which is more conducive to accurately installing the stator 4; during assembly, the stator 4 is press-fitted along the rotor 2 into the cavity between the housing 5 and the rotor 2; after the stator 4 is fixed, the position of its end face is also fixed; then the cover plate 1 is installed; in order to accurately fix the printed circuit board assembly 3; in the present utility model, a positioning ring groove for installing the printed circuit board assembly is opened on the inner side of the cover plate 1, the printed circuit board assembly 3 is pre-fixed in the positioning ring groove of the cover plate, and then the cover plate 3 is fixed to the end of the housing 5; of course, a second bearing 9 matching the other end of the rotor 2 is provided in the central hole of the cover plate.

[0019] In some improvable embodiments, the improvable forms include setting the upper end of the housing 5 as a stepped structure, and the cover plate 1 is matched with the stepped structure and fixed to the end of the housing 5.

[0020] While ensuring reliable fixation, the design requirement of fine adjustment is also considered. A stepped counterbore is provided on the inner side of the cover plate 1, and the outer larger-diameter table surface is matched with the end of the housing 5 for fixation; among them, a kidney-shaped hole is opened on the outer larger-diameter table surface on the inner side of the cover plate 1, and a bolt hole is opened corresponding to the end of the housing. The cover plate 1 and the housing 5 are fixed by bolts; the design form of the kidney-shaped hole is beneficial to the adjustment of the position of the end cover. A through hole is opened on the smaller-diameter table surface in the stepped counterbore on the inner side of the cover plate 1 as a through hole for the cable of the printed circuit board assembly.

[0021] In an improved embodiment, a counterbore is opened at the center of the bottom of the base, and an end cover is installed in the counterbore to realize the limit protection of the end of the rotor.

[0022] The motor debugging device proposed by the present utility model can replace the traditional motor debugging method. Debugging can be completed without installing the printed circuit board inside the motor housing. On the debugging device of the present utility model, the installation accuracy of the printed circuit board can be greatly improved. Due to the simple overall structure, more convenience is provided for the debugging of the printed circuit board. After the debugging is finally completed, the printed circuit board and the motor stator assembly form an integral body. Then, the overall structure is installed inside the motor housing without additional debugging processes, greatly improving the production efficiency and qualification rate of the motor.

[0023] The above specific implementation manners or cases are only used to explain and illustrate the technical solutions of the present utility model, and do not limit the present utility model. The parts not described in detail are regarded as conventional technical means in the art. Those of ordinary skill in the art should understand that based on the design concept of this application, the technical solutions recorded in the foregoing implementation manners should be adaptively modified, or some or all of the technical features should be equivalently replaced. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present utility model.

Claims

1. A motor debugging device, characterized in that, It includes a rotor, a stator, a printed circuit board assembly, a housing, a base, a first bearing, a second bearing, a cover plate, and a positioning pin; One end of the rotor is mounted on the central hole of the base through the first bearing; a positioning pin is also provided on the base, and a groove matching the positioning pin is provided on the side of the housing. The housing is sleeved on the rotor, and positioning is achieved by using the groove on the side of the housing; the stator is press-fitted along the rotor into the cavity between the housing and the rotor; a positioning ring groove for installing the printed circuit board assembly is formed on the inner side of the cover plate, the printed circuit board assembly is fixed in the positioning ring groove of the cover plate, and then the cover plate is fixed to the end of the housing; a second bearing matching the other end of the rotor is provided in the central hole of the cover plate.

2. The motor debugging device according to claim 1, characterized in that, The upper end of the housing is provided with a stepped structure, and the cover plate matches the stepped structure and is fixed to the end of the housing.

3. The motor debugging device according to claim 2, characterized in that A stepped counterbore is provided on the inner side of the cover plate, and the larger-diameter outer peripheral table surface is matched with the end of the housing for fixation.

4. The motor debugging device according to claim 3, characterized in that, A kidney-shaped hole is formed on the larger-diameter outer peripheral table surface on the inner side of the cover plate, and a bolt hole is formed corresponding to the end of the housing. The cover plate and the housing are fixed by bolts.

5. The motor debugging device according to claim 3, characterized in that A through hole is formed on the smaller-diameter table surface in the stepped counterbore on the inner side of the cover plate, which serves as a cable passing hole for the printed circuit board assembly.

6. A motor debugging device as claimed in claim 1, wherein A counterbore is formed at the center of the bottom of the base, and an end cover is installed in the counterbore to achieve limit protection for the end of the rotor.

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