High-efficiency press-fitting device and press-fitting method

Abstract

The application discloses a kind of high-efficiency press equipment and press method, it includes press mould group, the press mould group includes servo motor, rotating disc that is driven to carry out rotational motion by the servo motor, inner support rod fixed on the rotating disc, limit gland that is movably arranged on the outer circumferential surface of the inner support rod, first cylinder fixed on the rotating disc and driving the limit gland up and down movement, second cylinder fixed on the limit gland and the clamping jaw driven by the second cylinder and carried out opening or clamping movement.The application can press carbon brush holder in place at one time, greatly improve the assembly efficiency of carbon brush holder.

Description

[0001] The application belongs to the technical field of brush assembly, and particularly relates to a high-efficiency press-fitting device and a press-fitting method.

[0002] Motors are widely used as power source components in various fields. A motor generally comprises a motor shell, two end covers arranged at two ends of the motor shell, a stator arranged inside the motor shell, a rotor and the like. During motor assembly, the stator is first assembled into the motor shell, and then the rotor is assembled into the stator. After that, the carbon brush holder module of the motor needs to be assembled onto the motor rotor. The structure of the carbon brush holder module is disclosed in the prior art patent CN114389118A, which comprises a main shell, a circuit board, a filter assembly, a carbon brush assembly and a connecting plug, wherein the carbon brush assembly is installed in the main shell, and two carbon brushes of the carbon brush assembly are radially extended towards the center by elastic members. The carbon brush has a first position state and a second position state. In the first position state, the carbon brush is in an elastic active state at the first position, which is a normal working state. In the second position state, the carbon brush is in a clamped and fixed state with the carbon brush holder.

[0003] The prior art patent CN115378209A discloses an automatic installation assembly line for a motor rotor and a carbon brush holder. The carbon brush holder is conveyed to one side of a turntable through a carbon brush conveying line. The carbon brush holder is carried to the turntable by a first carbon brush holder transfer device. The first carbon brush adjustment position and the carbon brush detection position are arranged on the turntable. The first probe device is arranged at the first carbon brush adjustment position. The probe of the first probe device is inserted into the carbon brush to press the carbon brush to the second position. Then, whether the carbon brush is in the second position is detected at the carbon brush detection position. After the detection is qualified, the carbon brush is assembled into the rotor on the motor shell conveying line through a second carbon brush holder transfer device. Then, the carbon brush is moved to the second carbon brush adjustment position. The carbon brush is pushed back to the first position by a second probe device. Thus, the overall installation of the carbon brush holder is completed. The installation mode of the carbon brush holder in the patent has complicated steps, and the function structure is relatively more. Therefore, the efficiency is general.

[0004] Therefore, it is necessary to provide a new high-efficiency press-fitting device and a press-fitting method to solve the above problems.

[0005] One of the main purposes of the application is to provide a high-efficiency press-fitting device, which can press-fit the carbon brush holder in place at one time, and greatly improve the assembly efficiency of the carbon brush holder.

[0006] ​​​The application achieves the above-mentioned purpose through the following technical scheme: a high-efficiency press-fitting device, comprising a press-fitting module, the press-fitting module comprising a servo motor, a rotating disc driven to rotate by the servo motor, an inner supporting rod fixed on the rotating disc, a limiting pressure cover movably arranged on the outer circumferential surface of the inner supporting rod, a first air cylinder fixed on the rotating disc and driving the limiting pressure cover to move up and down, a second air cylinder fixed on the limiting pressure cover, and a clamping jaw driven by the second air cylinder to move to open or clamp.

[0007] Further, a limiting groove limiting the position of the outer circumferential surface of the carbon brush holder and the position of the top end surface is formed on the limiting pressure cover; the bottom of the inner supporting rod extends into the limiting groove to form an opening part limiting the opening degree of the carbon brush.

[0008] Further, the bottom of the inner supporting rod is formed with a receiving groove, and the inner diameter of the receiving groove is greater than the outer diameter of the rotor bearing in the motor housing.

[0009] Further, the inner diameter of the receiving groove is smaller than the outer diameter of the rotor in the motor housing, and the outer diameter of the inner supporting rod is greater than or equal to the outer diameter of the rotor.

[0010] Further, the limiting pressure cover is arranged on the outer circumferential surface of the inner supporting rod through a first linear bearing, and the body of the first air cylinder is fixed on the rotating disc and the piston end thereof is connected with the limiting pressure cover.

[0011] Further, the press-fitting module further comprises a positioning needle movably arranged in the inner supporting rod and synchronously rotating with the inner supporting rod.

[0012] Further, the bottom of the positioning needle is provided with a pointed part extending out of the bottom of the inner supporting rod.

[0013] Further, a second linear bearing is arranged in the inner supporting rod, and the positioning needle passes through the second linear bearing.

[0014] Further, it further comprises a first transfer module, a first support plate driven by the first transfer module to move horizontally and linearly, a second transfer module fixed on the first support plate, a second support plate driven by the second transfer module to move up and down, and the press-fitting module is arranged on the second support plate.

[0015] Another object of the application is to provide a high-efficiency press-fitting method, comprising:

[0016] S1, a plurality of carbon brush holders are clamped on a guide rod in a carbon brush clamping manner to realize carbon brush holder feeding;

[0017] S2, the inner support rod is used to butt joint the guide rod, the carbon brush holder is pushed from the guide rod to the inner support rod, and the carbon brush holder is picked up by holding the inner support rod through the carbon brush;

[0018] S3, a pair of clamping jaws are used to hold the connector on the carbon brush holder to realize angle positioning;

[0019] S4, the inner support rod is rotated to adjust the angle of the carbon brush holder to a set state;

[0020] S5, the inner support rod is butt jointed with the rotor in the motor housing, the outer peripheral surface of the inner support rod and the outer peripheral surface of the rotor form a continuous track, the carbon brush holder is pushed from the inner support rod to the rotor along the track, the carbon brush is held on the outer peripheral surface of the rotor, the connector is released by the clamping jaw, and the carbon brush holder is completed.

[0021] Compared with the prior art, the high-efficiency pressing equipment and pressing method have the beneficial effects that the carbon brush holder can be pressed into place at one time, and the assembly efficiency of the carbon brush holder is greatly improved.

[0022] 1) By arranging the inner support rod, the carbon brush holder is picked up by holding the inner support rod through the carbon brush, and a pair of clamping jaws are arranged on the inner support rod to hold the connector on the carbon brush holder, so that the angle position of the carbon brush holder on the inner support rod is maintained. During assembly, the carbon brush holder is pushed to the rotor by pushing down, the carbon brush is changed from being held on the carbon brush holder to being held on the rotor, one-time assembly is realized, the original operation steps of opening the carbon brush to the second position and then pushing back to the first position are saved, and the assembly efficiency of the carbon brush holder is improved;

[0023] 2) The receiving groove is arranged at the bottom of the inner support rod, the rotor bearing can be covered in the inner support rod when the inner support rod is butt jointed with the rotor, so that the inner support rod can be directly butt jointed with the rotor, and the carbon brush can be directly slid from the inner support rod to the rotor, thereby solving the problem that the carbon brush assembly is difficult due to the fact that the diameter of the rotor bearing is smaller than that of the rotor.

DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an embodiment of the application;

[0025] Figure 2 It is a structural schematic diagram of a pressing module in the embodiment of the application;

[0026] Figure 3 It is a partial structural schematic diagram of a pressing module in the embodiment of the application;

[0027] Figure 4 It is a structural schematic diagram of the assembly of the motor housing and the carbon brush holder in the embodiment of the application;

[0028] Figure 5 The structural schematic diagram of the carbon brush holder is taken as an embodiment of the present application;

[0029] The numbers in the figure represent:

[0030] 100-high efficient press-fitting device; 200-carbon brush holder, 201-carbon brush, 202-connector; 300-motor housing, 301-rotor, 302-rotor bearing; 400-guide rod;

[0031] 1-first transfer module; 2-first support plate; 3-second transfer module; 4-second support plate; 5-press-fitting module, 51-servo motor, 52-rotary disc, 53-inner support rod, 531-receiving groove, 532-expanding part, 533-slotted guide, 54-limiting gland, 541-limiting groove, 55-first air cylinder, 56-second air cylinder, 57-clamping jaw, 58-positioning pin, 581-sharp conical part, 59-pin, 510-elastic member.

DETAILED DESCRIPTION

[0032] Embodiment:

[0033] Please refer to Figures 1-5 The present embodiment is a high efficient press-fitting device 100, which comprises a first transfer module 1, a first support plate 2 driven by the first transfer module 1 to move horizontally and linearly, a second transfer module 3 fixed on the first support plate 2, a second support plate 4 driven by the second transfer module 3 to move up and down, and a press-fitting module 5 arranged on the second support plate 4.

[0034] The design idea of the present embodiment is to keep the carbon brush 201 in the carbon brush holder 200 in an extended clamping state, and to install it into the rotor in this state, directly and at one time, so as to save the operation of opening the carbon brush before assembly and the operation of pushing back the carbon brush after assembly, and to improve the assembly efficiency of the carbon brush holder. In order to realize the above operation, the press-fitting module 5 is optimized and designed in the present embodiment. Specifically, the press-fitting module 5 comprises a servo motor 51 fixed on the second support plate 4, a rotary disc 52 driven by the servo motor 51 to move rotationally, an inner support rod 53 fixed below the rotary disc 52, a limiting gland 54 movably arranged on the outer side of the inner support rod 53, a first air cylinder 55 fixed on the rotary disc 52 and driving the limiting gland 54 to move up and down, a second air cylinder 56 fixed on the limiting gland 54, and a clamping jaw 57 driven by the second air cylinder 56 to move to open or clamp.

[0035] The main purpose of the inner support rod 53 is to provide a support surface for the carbon brush 201, so that the carbon brush 201 is kept between the first position state and the second position state. When the support surface is removed, the carbon brush 201 can reach the first position state under the action of the spring in its own body.

[0036] When the carbon brush holder 200 is taken out, the carbon brush 201 is clamped on the inner support rod 53, and the upper end position of the carbon brush holder shell is limited by the limiting pressure cover 54, and the connector 202 on the carbon brush holder 200 is clamped by the clamping jaw 57 to realize angular position positioning; when the carbon brush holder 200 is assembled, the limiting pressure cover 54 is driven by the first air cylinder 55 to move downward, and the carbon brush holder 200 is pushed away from the inner support rod 53, and the outer periphery of the carbon brush holder 200 is matched with the inner ring of the motor shell, and the carbon brush 201 is directly clamped on the outer peripheral surface of the rotor.

[0037] Since the rotor 301 is assembled in the motor shell 300, a rotor bearing 302 is arranged on the rotating shaft of the rotor 301, and the outer diameter of the rotor bearing 302 is smaller than the outer diameter of the rotor 301. When the carbon brush holder 200 is pushed into the motor shell from top to bottom, the carbon brush 201 will move to the center of the carbon brush holder under the action of the spring in the carbon brush holder when the carbon brush 201 is separated from the inner support rod 53. In order to prevent the carbon brush 201 from being stuck to the surface of the rotor bearing 302 during the sliding process, the sliding path of the carbon brush 201 should avoid the appearance of the rotor bearing 302, so the inner support rod 53 is optimized and designed in this embodiment. The bottom of the inner support rod 53 is formed with a receiving groove 531, the inner diameter of the receiving groove 531 is greater than the outer diameter of the rotor bearing 302 and smaller than the outer diameter of the rotor 301, and the outer diameter of the inner support rod 53 is greater than or equal to the outer diameter of the rotor 301, preferably, the outer diameter of the inner support rod 53 is equal to the outer diameter of the rotor 301, so that the outer periphery of the inner support rod 53 can be directly connected with the outer periphery of the rotor 301 to form a continuous track. When the carbon brush holder 200 is assembled, the inner support rod 53 is covered outside the rotor bearing 302 through the receiving groove 531, and the sliding track of the carbon brush holder 200 is directly composed of the outer peripheral surface of the inner support rod 53 and the outer peripheral surface of the rotor 301, so that the carbon brush 201 can be directly clamped on the outer periphery of the rotor 301 after being separated from the inner support rod 53, thereby effectively avoiding the influence of the rotor bearing 302.

[0038] In this embodiment, the limiting pressure cover 54 is arranged on the outer periphery of the inner support rod 53 through the first linear bearing, and the body of the first air cylinder 55 is fixed on the rotating disc 52 and the piston end thereof is connected with the limiting pressure cover 54. The limiting pressure cover 54 is formed with a limiting groove 541 for limiting the position of the outer peripheral surface of the carbon brush holder 200 and the top end surface. The bottom of the inner support rod 53 extends into the limiting groove 541 to form a support opening 532 for limiting the support opening degree of the carbon brush 201.

[0039] When the carbon brush holder 200 is assembled into the motor housing 300, the connector 202 thereon needs to correspond to the gap position on the motor housing 300, and therefore, the angular position of the carbon brush holder 200 when it is clamped on the inner support rod 53 also needs to be limited. In the embodiment, the clamping jaw 57 clamps the connector 202, which can ensure that the angular position of the carbon brush holder 200 relative to the inner support rod 53 is stable. At the same time, the inner support rod 53, the limiting pressure cover 54 and the clamping jaw 57 are all arranged on the rotating disc 52, and the angular state of the carbon brush holder 200 can be adjusted by driving the rotating disc 52 to rotate, so that the carbon brush holder 200 can be precisely assembled into the motor housing 300.

[0040] In order to better pick up the carbon brush holder 200 on the inner support rod 54, the press-fitting module 5 also includes a positioning needle 58 which is arranged in the inner support rod 53 in an up-and-down floating manner and rotates synchronously with the inner support rod 53. The bottom of the positioning needle 58 is provided with a sharp conical part 581 which extends out of the bottom of the inner support rod 53. Through the design of the positioning needle 58, the inner support rod 53 can be positioned with the inner hole of the guide rod in the carbon brush jig when the carbon brush holder 200 is picked up, so that the circumferential surface of the inner support rod 53 is butted against the circumferential surface of the guide rod, and then the carbon brush holder can be pushed from the guide rod to the inner support rod 53 and clamped on the inner support rod 53 by the carbon brush 201 to realize the pickup of the carbon brush holder 200 by the inner support rod 53. When the carbon brush holder is assembled, the positioning needle 58 can be retracted into the inner support rod 53 due to the up-and-down floating function of the positioning needle 58, so that the rotor bearing 302 can enter the inner part of the inner support rod 53 to realize position avoidance.

[0041] A pair of sliding grooves 533 are arranged on the circumferential surface of the inner support rod 53, the positioning needle 58 is connected with the inner support rod 53 through the sliding grooves 533 by a pin 59, and the inner support rod 53 is provided with an elastic member 510 which holds the positioning needle 58 downward, so that the positioning needle 58 can axially float in the inner support rod 53 and can also rotate synchronously with the inner support rod 53 under the action of the pin 59. The inner support rod 53 is provided with a second linear bearing, and the positioning needle 58 passes through the second linear bearing, so that the positioning needle 58 will not be skewed when it floats up and down relative to the inner support rod 53 and remains coaxial with the inner support rod 53.

[0042] The embodiment also provides a high-efficiency press-fitting method of a carbon brush holder, which comprises the following steps:

[0043] S1, a plurality of carbon brush holders 200 are clamped on a guide rod 400 in a clamping manner by carbon brushes 201 to realize the feeding of the carbon brush holders 200, and the top of the guide rod 400 is provided with a positioning hole;

[0044] S2, the pointed part 581 of the positioning needle 58 is inserted into the positioning hole, the inner support rod 53 and the guide rod 400 are precisely connected, the upward force is applied to the carbon brush holder 200, the carbon brush holder 200 is slid from the guide rod 400 to the inner support rod 53, and then the clamping jaw 57 clamps the connector 202 on the carbon brush holder 200, so that the angle position is stable;

[0045] S3, the inner support rod 53 moves to the upper side of the motor housing 300 with the carbon brush holder 200, the servo motor 51 drives the rotating disc 52 to rotate, the carbon brush holder 200 is adjusted to the angle position, so that the connector 202 is aligned with the gap position on the motor housing 300, then the whole is lowered, and then the positioning needle 58 holds the rotor shaft, the inner support rod 53 continues to descend until the bottom end is abutted against the shaft end surface of the rotor 301, and the positioning needle 58 is inwardly retracted into the inner support rod 53, and the rotor bearing 302 is covered in the inner support rod 53;

[0046] S4, at this time, the outer circumferential surface of the inner support rod 53 and the outer circumferential surface of the rotor 301 form a continuous track, the first cylinder 55 drives the limiting gland 54 to move downward, and the carbon brush holder 200 is pushed downward, the carbon brush holder 200 is slid downward on the continuous track formed by the outer circumferential surface of the inner support rod 53 and the outer circumferential surface of the rotor 301, until the carbon brush 201 is tightly held on the outer circumferential surface of the rotor 301, and reaches the first position state, the clamping jaw 57 releases the connector 202, the press-fitting module 5 is withdrawn, and the press-fitting of the carbon brush holder 200 is completed. The continuous track described herein includes a continuous track without steps and discontinuities, and also includes a continuous track with steps and discontinuities, but when there are steps and discontinuities, only the outer diameter of the inner support rod 53 is large, and the outer diameter of the rotor 301 is small.

[0047] The above only describes some embodiments of the present application. Those skilled in the art can make several modifications and improvements without departing from the inventive concept, and these all belong to the protection scope of the present application.

Claims

1. A high-efficiency pressing device, characterized in that: It includes a press-fit module, which comprises a servo motor, a rotary disk driven by the servo motor to rotate, an inner support rod fixed on the rotary disk, a positioning pin that floats up and down inside the inner support rod and rotates synchronously with the inner support rod, a limiting cover that moves up and down on the outer circumferential surface of the inner support rod, a first cylinder fixed on the rotary disk and driving the limiting cover to move up and down, a second cylinder fixed on the limiting cover, and a gripper driven by the second cylinder to open or clamp. The bottom of the inner support rod has a receiving groove, the inner diameter of which is larger than the outer diameter of the rotor bearing in the motor housing; the inner diameter of the receiving groove is smaller than the outer diameter of the rotor in the motor housing, and the outer diameter of the inner support rod is greater than or equal to the outer diameter of the rotor; the bottom of the positioning pin has a pointed cone extending out of the bottom of the inner support rod.

2. The high-efficiency pressing equipment as described in claim 1, characterized in that: The limiting cover has a limiting groove that limits the position of the outer peripheral surface and the top surface of the carbon brush holder; the bottom of the inner support rod extends into the limiting groove to form a supporting part that limits the degree of carbon brush opening.

3. The high-efficiency pressing equipment as described in claim 1, characterized in that: The limiting cover is disposed on the outer periphery of the inner support rod via a first linear bearing, and the body of the first cylinder is fixed on the rotating disk and its piston end is connected to the limiting cover.

4. The high-efficiency pressing equipment as described in claim 1, characterized in that: The inner support rod is equipped with a second linear bearing, and the positioning pin passes through the second linear bearing.

5. The high-efficiency pressing equipment as described in claim 1, characterized in that: It also includes a first transfer module, a first support plate driven by the first transfer module to move horizontally in a straight line, a second transfer module fixed on the first support plate, and a second support plate driven by the second transfer module to move up and down. The pressing module is disposed on the second support plate.

6. A high-efficiency press-fitting method, characterized in that: Based on the high-efficiency pressing equipment as described in any one of claims 1 to 5, it includes: S1. Several carbon brush holders are held together on a guide rod by carbon brush clamping, so as to realize carbon brush holder feeding; S2. Using an inner support rod to connect with the guide rod, the carbon brush holder is pushed from the guide rod to the inner support rod, and the carbon brush holder is picked up by gripping the inner support rod with the carbon brush. S3. Angle positioning is achieved by using a pair of grippers to hold the connector on the carbon brush holder. S4. Rotate the inner support rod to adjust the angle of the carbon brush holder to the set state; S5. Connect the inner support rod to the rotor in the motor housing. The outer peripheral surface of the inner support rod and the outer peripheral surface of the rotor form a continuous track. Push the carbon brush holder from the inner support rod to the rotor along the track. The carbon brushes are held tightly on the outer peripheral surface of the rotor. The clamps release the connector to complete the carbon brush holder press-fitting.

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