Carbon brush holder assembly tool

Abstract

The utility model discloses a carbon brush holder assembly frock, through the positioning punch structure of ingenious design, the key problem in carbon brush holder assembly process is solved fundamentally. The positioning punch plays the core role of temporary fixed ring in the assembly process, when carbon brush is loaded into the brush box, the rear spring pushes out carbon brush forward, positioning punch can be accurate to resist carbon brush front end at this moment, prevents it and moves forward because of spring elasticity, ensures that four carbon brushes keep steady preloading position in the brush box. When installing the circular fixed ring, the operator only needs to press the positioning punch downward, and the positioning punch moves downward under the elastic action, and the space is left for the installation of the fixed ring, finally, the fixed ring is accurately placed in the center of the bottom plate, at this moment, the fixed ring is clamped and fixed firmly under the spring thrust of carbon brush, and the final assembly is completed.

Description

Technical Field

[0001] This utility model relates to the field of carbon brush holder assembly technology, specifically to a carbon brush holder assembly tooling. Background Technology

[0002] The carbon brush holder is one of the main components inside the motor. The assembly process of this type of brush holder is as follows: four plastic brush boxes are mounted on a base plate, the carbon brushes are put into the brush boxes, and then a spring is installed at the rear of each carbon brush to push the carbon brush forward. A circular hard plastic retaining ring is placed in the middle of the four carbon brushes. After this assembly, a finished carbon brush holder is obtained.

[0003] Currently, carbon brush holders are mainly assembled manually. Due to the lack of reliable and suitable assembly tools, manual assembly is not only inefficient and time-consuming, increasing production costs, but also difficult to control the installation dimensions, which can lead to low installation accuracy and ultimately cause the product to fail to operate normally during testing. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the purpose of this utility model is to provide a carbon brush holder assembly tooling to solve the problems of low assembly efficiency, long assembly time and low installation accuracy caused by the lack of reliable assembly tooling for workers when assembling carbon brush holders.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution:

[0006] A carbon brush holder assembly fixture includes an upper fixed seat and a lower fixed seat arranged vertically. Multiple positioning punches are provided between the upper and lower fixed seats. The positioning punches are arranged vertically and located in the middle of the lower fixed seat, and are evenly distributed circumferentially along the lower fixed seat. The lower end of each positioning punch is elastically connected to the lower fixed seat, allowing it to move vertically upwards or downwards without slipping out of the lower fixed seat. The upper end of each positioning punch passes through the upper fixed seat and extends from the side of the upper fixed seat opposite to the lower fixed seat.

[0007] Preferably, multiple positioning rods are provided between the upper fixed seat and the lower fixed seat. The positioning rods are arranged vertically and located outside the positioning punch, and are evenly distributed around the circumference of the lower fixed seat. One end of the positioning rod extends into the lower fixed seat along its length and is fixedly connected to the lower fixed seat. The other end of the positioning rod passes through the upper fixed seat and extends out from the side surface of the upper fixed seat away from the lower fixed seat.

[0008] Preferably, an adjusting screw is provided below the positioning punch, and the adjusting screw is provided in a one-to-one correspondence with the positioning punch; one end of the adjusting screw is threadedly connected to the lower fixed seat, and the other end extends from the side surface of the lower fixed seat away from the upper fixed seat; a telescopic spring is also provided between the adjusting screw and the positioning punch, one end of the telescopic spring along its length direction is sleeved on the lower end of the positioning punch, and the other end abuts against the adjusting screw.

[0009] Preferably, a circular positioning groove is provided on the surface of the upper fixed seat opposite to the lower fixed seat, and the vertical axis of the positioning groove coincides with the vertical axis of the upper fixed seat; the upper end of the positioning punch is located in the positioning groove and can extend vertically upward from the bottom of the positioning groove.

[0010] Preferably, a plurality of strip-shaped grooves are provided on the side surface of the upper fixing seat opposite to the lower fixing seat. One end of the groove along its length is connected to the positioning groove, and the other end along its length penetrates the upper part of the outer side wall of the upper fixing seat; the bottom of the groove is flush with the bottom of the positioning groove.

[0011] Preferably, the included angle between two adjacent grooves is 30° or 150°.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. This utility model fundamentally solves the key problem in the carbon brush holder assembly process through a cleverly designed positioning punch structure. The positioning punch plays a crucial role as a temporary fixing ring during assembly. When the carbon brushes are inserted into the brush holder, the rear spring pushes the brushes forward. At this time, the positioning punch precisely holds the front end of the carbon brush, preventing it from moving forward due to spring force, ensuring that the four carbon brushes maintain a stable pre-installed position within the brush holder. When installing the circular fixing ring, the operator only needs to press down on the positioning punch. The positioning punch moves downward under elastic force, creating space for the fixing ring installation. Finally, the fixing ring, using the positioning action of the positioning punch, can be accurately placed in the center of the base plate. At this point, the carbon brushes, under the spring force, firmly clamp and fix the fixing ring, completing the final assembly.

[0014] 2. The elastic structure of the positioning punch in this invention enables automated adjustment of the assembly process, eliminating the need for repeated manual adjustments to the carbon brush position, significantly improving assembly accuracy, and ensuring that the fixing ring is accurately installed in the center of the base plate, avoiding product failure due to positional misalignment. Secondly, the entire assembly process is simplified from traditional manual operation to three simple actions: "place-press-release," significantly shortening the assembly time for a single carbon brush holder and greatly improving production efficiency. Furthermore, the circular positioning groove and strip groove design of the upper fixing seat, combined with the circumferentially evenly distributed positioning punch, achieves synchronous positioning of the four carbon brushes and precise alignment of the fixing ring, improving equipment accuracy. Even manual assembly by workers can fully meet design requirements. In addition, the design of the adjusting screw makes the elastic force of the positioning punch adjustable, adapting to the elastic force requirements of different specifications of springs, greatly enhancing the versatility and adaptability of the tooling.

[0015] 3. Overall, the assembly fixture described in this utility model not only completely solves the technical problems of low efficiency and poor precision in manual assembly, but also ensures the consistency of product quality through standardized assembly processes, reducing the skill requirements for operators. In the prior art, the assembly of this carbon brush assembly does not have dedicated fixtures, resulting in an assembly efficiency of only 30 sets / hour. However, the assembly fixture described in this utility model can achieve an assembly efficiency of 150 sets / hour in actual use, saving enterprises a lot of labor costs and rework costs, and has extremely high practical value and economic benefits. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of a carbon brush holder assembly tool according to the present invention.

[0017] Figure 2 This is a schematic diagram of the positioning punch in the assembly fixture.

[0018] Figure 3 This is a schematic diagram of the structure on which the base plate is fixed to the assembly fixture.

[0019] Figure 4 This is a schematic diagram showing the position of the base plate on the assembly fixture when it is not fixed.

[0020] In the diagram: 1. Upper fixed seat; 2. Lower fixed seat; 3. Positioning punch; 4. Positioning rod; 5. Adjusting screw; 6. Telescopic spring; 7. Positioning groove; 8. Groove; 9. Base plate. Detailed Implementation

[0021] This utility model will be clearly and completely described with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on this utility model are within the protection scope of this utility model.

[0022] This utility model provides a carbon brush holder assembly fixture, such as... Figure 1-4 As shown, the assembly fixture includes an upper fixed seat 1 and a lower fixed seat 2 arranged vertically. Both the upper and lower fixed seats are cylindrical to match the circular base plate in the carbon brush holder. Multiple positioning punches 3 are provided between the upper and lower fixed seats. These positioning punches are arranged vertically, located in the center of the lower fixed seat, and evenly distributed circumferentially around the lower fixed seat. The lower end of each positioning punch is elastically connected to the lower fixed seat, allowing it to move vertically upwards or downwards without slipping out of the lower fixed seat. The upper end of each positioning punch passes through the upper fixed seat and extends from the side of the upper fixed seat opposite to the lower fixed seat.

[0023] This invention addresses the practical problems of low efficiency, long assembly time, and difficulty in ensuring installation accuracy in the manual assembly of existing carbon brush holders. Based on this, the design specifically considers the technical challenges of carbon brushes moving forward within the brush holder due to spring force and the difficulty in accurately positioning the retaining ring. Therefore, this invention fundamentally solves the key problems in the carbon brush holder assembly process through a cleverly designed positioning punch structure. The positioning punch plays a crucial role as a temporary retaining ring during assembly. After the carbon brushes are inserted into the brush holder, the rear spring pushes the brushes forward. At this time, the positioning punch accurately holds the front end of the carbon brush, preventing it from moving forward due to spring force, ensuring that the four carbon brushes maintain a stable pre-installed position within the brush holder. When installing the circular retaining ring, the operator simply presses down on the positioning punch, which moves downward under elastic force, creating space for the retaining ring installation. Finally, the retaining ring is accurately placed in the center of the base plate. At this point, the carbon brushes, under the spring force, firmly clamp and fix the retaining ring, completing the final assembly.

[0024] In some embodiments of this utility model, multiple positioning rods 4 are provided between the upper fixed seat and the lower fixed seat. These positioning rods are arranged vertically and located outside the positioning punch, and are evenly distributed circumferentially around the lower fixed seat. One end of the positioning rod extends into the lower fixed seat and is fixedly connected to it. The other end of the positioning rod passes through the upper fixed seat and extends out from the side of the upper fixed seat facing away from the lower fixed seat. The function of the positioning rods is to fix the base plate 9 on the carbon brush holder during use. Multiple mounting holes are provided on the base plate, which can also serve as temporary fixing holes. The upper end of the positioning rod passes through the upper fixed seat and extends out from the side of the upper fixed seat facing away from the lower fixed seat, passing through these mounting holes on the base plate to temporarily fix the base plate, preventing it from moving during carbon brush assembly and affecting the assembly quality.

[0025] In some embodiments of this utility model, an adjusting screw 5 is provided below the positioning punch, and the adjusting screw is provided in a one-to-one correspondence with the positioning punch. One end of the adjusting screw is threadedly connected to the lower fixed seat, and the other end extends from the side surface of the lower fixed seat opposite to the upper fixed seat. A telescopic spring 6 is also provided between the adjusting screw and the positioning punch, with one end of the telescopic spring sleeved on the lower end of the positioning punch along its length, and the other end abutting against the adjusting screw. In actual use, the adjusting screw is used to adjust the height of the positioning punch extending from the surface of the upper fixed seat, so that it can be used for assembling carbon brush holders of different sizes. Meanwhile, the telescopic spring provides elastic adjustment between the positioning punch and the adjusting screw. This high-stiffness telescopic spring allows the worker to place the pre-assembled carbon brush box base plate onto the assembly fixture. Under the action of the telescopic spring, the positioning punch extends from the upper fixing seat surface, blocking the carbon brushes in the carbon brush box and providing temporary positioning and fixation. Subsequently, the fixing ring is inserted through the hole in the center of the base plate. During insertion, the fixing ring presses downwards against the positioning punch, which in turn presses downwards against the telescopic spring, while simultaneously applying an upward force to the fixing ring. This allows the fixing ring to be inserted into the hole in the center of the base plate under the combined action of these two forces. The telescopic spring ensures that the structure blocking the carbon brushes quickly and stably changes from the positioning punch to the fixing ring. This process does not significantly affect the position of the carbon brush box or the position of the carbon brushes within it, ensuring that even manually assembled products achieve the required design precision.

[0026] In some embodiments of this utility model, a circular positioning groove 7 is provided on the surface of the upper fixed seat opposite to the lower fixed seat. The vertical axis of the positioning groove coincides with the vertical axis of the upper fixed seat. The upper end of the positioning punch is located in the positioning groove and can extend vertically upward from the bottom of the positioning groove. Multiple strip-shaped grooves 8 are also provided on the surface of the upper fixed seat opposite to the lower fixed seat. One end of each groove is connected to the positioning groove, and the other end extends through the upper part of the outer side wall of the upper fixed seat. The bottom of each groove is flush with the bottom of the positioning groove. The included angle between two adjacent grooves is 30° or 150°. In actual use, the positions of the positioning groove and the grooves correspond one-to-one with the positions of the carbon brush boxes on the base plate, such as... Figure 3 As shown, the positioning groove is used to accurately position the base plate, and the groove provides workers with sufficient operating space during the assembly process, facilitating quick assembly.

[0027] Usage process: First, pre-install the spring and other related parts on the base plate; then install the four carbon brush holders with carbon brushes already installed on the base plate, and then place the base plate on the assembly fixture described in this utility model. Use the positioning rod to temporarily fix the base plate on the assembly fixture to prevent the base plate from moving during subsequent assembly. At the same time, adjust the position of the positioning punch so that it can temporarily block the carbon brushes in the carbon brush holders to prevent them from moving during subsequent installation; next, insert the fixing ring into the hole in the center of the base plate, and at the same time, press the positioning punch downward to push it out of the hole in the center of the base plate, thereby completing the assembly of the fixing ring and obtaining the carbon brush holder assembly.

[0028] This utility model is not limited to the above-described embodiments. Any structure that is the same as or similar to the above-described embodiments of this utility model is within the protection scope of this utility model.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of this utility model that do not depart from the spirit and scope of this technical solution should be covered within the scope of the claims of this utility model.

Claims

1. A carbon brush holder assembly fixture, characterized in that, The assembly fixture includes an upper fixed seat (1) and a lower fixed seat (2) arranged vertically. Multiple positioning punches (3) are provided between the upper fixed seat and the lower fixed seat. The positioning punches are arranged vertically and located in the middle of the lower fixed seat, and are evenly distributed around the circumference of the lower fixed seat. The lower end of the positioning punch is elastically connected to the lower fixed seat, so that the positioning punch can move up or down in the vertical direction, and the positioning punch will not slide out of the lower fixed seat. The upper end of the positioning punch passes through the upper fixed seat and extends out from the side surface of the upper fixed seat away from the lower fixed seat.

2. The assembly tooling according to claim 1, characterized in that, Multiple positioning rods (4) are provided between the upper fixed seat and the lower fixed seat. The positioning rods are arranged vertically and located outside the positioning punch, and are evenly distributed along the circumferential distance of the lower fixed seat. One end of the positioning rod extends into the lower fixed seat along its length and is fixedly connected to the lower fixed seat. The other end of the positioning rod passes through the upper fixed seat and extends out from the side surface of the upper fixed seat away from the lower fixed seat.

3. The assembly tooling according to claim 1, characterized in that, Below the positioning punch, there is an adjusting screw (5), which corresponds to the positioning punch. One end of the adjusting screw is threaded to the lower fixed seat, and the other end extends from the side surface of the lower fixed seat away from the upper fixed seat. Between the adjusting screw and the positioning punch, there is a telescopic spring (6), one end of which is sleeved on the lower end of the positioning punch along its length, and the other end abuts against the adjusting screw.

4. The assembly tooling according to claim 3, characterized in that, A circular positioning groove (7) is provided on the side surface of the upper fixed seat away from the lower fixed seat. The vertical axis of the positioning groove coincides with the vertical axis of the upper fixed seat. The upper end of the positioning punch is located in the positioning groove and can extend vertically upward from the bottom of the positioning groove.

5. The assembly tooling according to claim 4, characterized in that, On the side of the upper fixed seat away from the lower fixed seat, there are also a number of strip-shaped grooves (8). One end of the groove is connected to the positioning groove along its length direction, and the other end of the groove passes through the upper part of the outer side wall of the upper fixed seat. The bottom of the groove is flush with the bottom of the positioning groove.

6. The assembly tooling according to claim 5, characterized in that, The included angle between two adjacent grooves is 30° or 150°.

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