Motor carbon brush grinding tool

Abstract

A motor carbon brush grinding tool comprises a grinding machine frame (1), a grinding die (2) and a carbon brush clamp (3), an ejector pin (4) is arranged on one side of the grinding machine frame (1), a hand-cranking transmission mechanism (5) is arranged on the other side of the grinding machine frame (1), abrasive paper (6) wraps the grinding die (2) in a winding mode, and the grinding die (2) is installed between the ejector pin (4) and the hand-cranking transmission mechanism (5). The grinding tool has the advantages that the grinding precision is improved, the comprehensive contact between the carbon brush and the slip ring or the commutator is ensured, and sparks and energy consumption are reduced. The grinding tool is simple in design structure and convenient to operate, the labor intensity is reduced, the grinding efficiency is improved, and the requirement for large-scale carbon brush replacement is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor maintenance and overhauling equipment field, concretely relates to a motor carbon brush grinding tool. BACKGROUND

[0002] At present, with the continuous development of industrial technology, the motor as a power source has been widely used in various mechanical equipment. And the carbon brush in the motor as a key conductive component, its performance directly affects the working efficiency, reliability and service life of the motor. The contact quality and contact area between the carbon brush and the slip ring or commutator in the motor are the key factors to determine the current transmission efficiency and motor commutation performance. Therefore, how to efficiently and accurately grind the carbon brush to ensure its good contact with the slip ring or commutator has become a problem to be solved in the field of motor maintenance and manufacturing. In the current motor carbon brush grinding field, manual grinding is mainly used. Although manual grinding of carbon brush is flexible, it has obvious shortcomings. First, the precision of manual grinding is low, and it is difficult to ensure the overall contact of the carbon brush with the slip ring or commutator, which leads to poor contact and increases spark and energy consumption. Second, manual grinding is time-consuming and laborious, and the efficiency is low, which is difficult to meet the demand of large-scale replacement of carbon brush. In addition, the quality of manual grinding is difficult to guarantee, which may lead to shortening of the service life of the carbon brush and increase of the maintenance cost. It is necessary to provide a grinding tool with simple structure, convenient operation, high grinding precision and high efficiency. SUMMARY

[0003] The utility model discloses a motor carbon brush grinding tool.

[0004] The utility model discloses a motor carbon brush grinding tool.

[0005] The utility model discloses a motor carbon brush grinding tool.

[0006] The utility model discloses a motor carbon brush grinding tool.

[0007] The outer wall of the mold cylinder is provided with a mounting slot, one end of the sandpaper is inserted into the mounting slot, and the sandpaper is wound on the mold cylinder starting from the mounting slot and is fixed by a pair of straps.

[0008] The end of the grinding rod is provided with a limiting groove matched with the ejector pin, and the other end of the grinding rod is provided with a pin hole. The hand-operated transmission mechanism comprises a driving shaft and a hand wheel. The driving shaft is movably arranged on the grinding frame through a bearing. The end of the driving shaft is provided with a grinding mounting slot. The grinding mounting slot is provided with a pin hole. The other end of the grinding rod is located in the grinding mounting slot. A locking pin is inserted into the pin hole to fix the other end of the grinding rod in the grinding mounting slot of the driving shaft. The other end of the driving shaft is connected with the hand wheel in transmission through a gear reducer.

[0009] The grinding frame is provided with an ejector pin mounting table. The side wall of the ejector pin mounting table is provided with a pin hole. The top of the ejector pin mounting table is provided with a threaded hole. The ejector pin is located in the pin hole. A locking screw is screwed into the threaded hole to press and fix the ejector pin.

[0010] The carbon brush clamp comprises a clamp support, a U-shaped frame and a cross rod. The U-shaped frame is arranged on the top of the clamp support. The cross rod is provided with a carbon brush clamp. The carbon brush is clamped and fixed by the carbon brush clamp.

[0011] The two ends of the U-shaped frame are respectively provided with angle adjusting plates. The angle adjusting plates are provided with arc-shaped adjusting grooves. The two ends of the cross rod are respectively provided with threaded holes. The arc-shaped adjusting grooves are provided with adjusting screws. The adjusting screws are screwed into the threaded holes of the ends of the cross rod to fix the cross rod.

[0012] The clamp support is composed of a support plate and a support column. The support column is arranged on the support plate. The middle part of the U-shaped frame is provided with an adjusting sleeve. The outer wall of the adjusting sleeve is provided with a locking hole. The support column is located in the adjusting sleeve. A locking screw is screwed into the locking hole to fix the U-shaped frame on the support column.

[0013] The support plate is a triangular support plate.

[0014] The utility model discloses the advantages are:

[0015] 1. Improve the grinding precision: through this grinding tool, improve the grinding precision, ensure that carbon brush and slip ring or commutator are contacted fully, reduce spark and energy consumption.

[0016] 2. Improve the grinding efficiency: the design structure is simple, and the grinding tool is convenient to operate, reduces the labor intensity, improves the grinding efficiency, and meets the demand of large-scale carbon brush replacement.

[0017] 3. Enhance adaptability: the grinding tool meets the grinding demand of different specifications and models of carbon brushes, reduces the cost and time of equipment replacement and debugging.

[0018] 4. Reduce the heat in the grinding process: reduce the heat generation in the grinding process, prevent carbon brush deformation or damage.

[0019] 5. Training teaching: through the use of the grinding tool for practical exercises, students can intuitively understand the steps, skills and precautions of carbon brush grinding. It can deepen the understanding and memory of students than pure theoretical explanation. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the structural schematic diagram of the utility model.

[0021] Figure 2 is the structural schematic diagram of the grinding mold of the utility model.

[0022] Figure 3 is the structural schematic diagram of the grinding mold of the utility model.

[0023] Figure 4 is the structural schematic diagram of the grinding mold of the utility model.

[0024] Figure 5 is the structural schematic diagram of the carbon brush clamp of the utility model. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0027] It should be noted that: similar labels and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0028] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product of the present application is usually placed, which is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, if the terms "first", "second" and the like appear in the description of the present application, they are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0029] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, if the terms "set", "connected" appear, they should be understood in a broad sense, for example, they can be fixedly connected, or detachably connected, or integrally connected, they can be mechanically connected, or electrically connected, they can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] As shown in the drawings, the utility model includes grinding frame 1, grinding mould 2 and carbon brush clamp 3,

[0031] Grinding frame 1 one side is provided with thimble 4, grinding frame 1 other side is provided with hand shake transmission mechanism 5, grinding mould 2 is wound and is covered with sand paper 6, grinding mould 2 is installed between thimble 4 and hand shake transmission mechanism 5, drives grinding mould 2 to rotate through hand shake transmission mechanism 5, carbon brush clamp 3 is placed in grinding mould 2 one side, and motor carbon brush is clamped and fixed on carbon brush clamp 3, and carbon brush clamp 3 drives motor carbon brush to contact sand paper 6 and grinds.

[0032] Grinding mould 2 includes grinding rod 7, mould cylinder 8, fixed nut 9 and locking nut 10, the outer wall of one end of grinding rod 7 is provided with screw thread, the outer wall of the other end of grinding rod 7 is provided with limit ring 11, limit disc 12 is arranged at both ends of mould cylinder 8 respectively, installation hole is opened in mould cylinder 8, mould cylinder 8 is sleeved on grinding rod 7, one end of mould cylinder 8 abuts against limit ring 11, fixed nut 9 and locking nut 10 are installed on the screw thread of one end of grinding rod 7 respectively, fixed nut 9 tightly fixes mould cylinder 8, and locking nut 10 is tightly locked on fixed nut 9, and sand paper 6 is wound and covered on mould cylinder 8.

[0033] The outer wall of mould cylinder 8 is provided with installation slot 13, one end of sand paper 6 is inserted into installation slot 13, and is wound on mould cylinder 8 from installation slot 13 as a starting point, and is fixed by a pair of straps 14.

[0034] The end of the grinding rod 7 is provided with a limiting groove matched with the thimble 4, and the other end of the grinding rod 7 is provided with a pin hole. The hand-shaking transmission mechanism 5 comprises a driving shaft 15 and a hand wheel 16. The driving shaft 15 is movably installed on the grinding frame 1 through a bearing. The end of the driving shaft 15 is provided with a grinding installation groove, and the other end of the driving shaft 15 is provided with a pin hole. The other end of the grinding rod 7 is located in the grinding installation groove, and a locking pin is inserted into the pin hole to fix the other end of the grinding rod 7 in the grinding installation groove of the driving shaft 15. The other end of the driving shaft 15 is connected with the hand wheel 16 through a gear reducer.

[0035] The grinding frame 1 is provided with a thimble installation table 17. The side wall of the thimble installation table 17 is provided with a needle hole, and the top of the thimble installation table 17 is provided with a threaded hole. The thimble 4 is located in the needle hole, and a locking screw is screwed into the threaded hole to press and fix the thimble 4.

[0036] The carbon brush clamp 3 comprises a clamp support 18, a U-shaped frame 19 and a cross rod 20. The U-shaped frame 19 is installed on the top of the clamp support 18, and the cross rod 20 is provided with a carbon brush clamp 21 for clamping and fixing the carbon brush.

[0037] The two ends of the U-shaped frame 19 are respectively provided with an angle adjusting plate 22, and the angle adjusting plate 22 is provided with an arc-shaped adjusting groove 23. The two ends of the cross rod 20 are respectively provided with a threaded hole, and the arc-shaped adjusting groove 23 is provided with an adjusting screw 24. The adjusting screw 24 is screwed into the threaded hole at the end of the cross rod 20 to fix the cross rod 20.

[0038] The clamp support 18 is composed of a support plate 25 and a support column 26. The bottom of the support column 26 is installed on the support plate 25, and the middle of the U-shaped frame 19 is provided with an adjusting sleeve 27. The outer wall of the adjusting sleeve 27 is provided with a locking hole, and the support column 26 is located in the adjusting sleeve 27. A locking screw is screwed into the locking hole to fix the U-shaped frame 19 on the support column 26.

[0039] The support plate 25 is a triangular support plate.

[0040] In the use process, the staff first clamps the carbon brush through the carbon brush clamp 21, then loosens the adjusting screw 24, rotates the cross rod 20 around the arc-shaped adjusting groove 23 by a certain angle to adjust the grinding angle of the carbon brush, tightens the adjusting screw 24 after the adjustment is completed, and adjusts the height of the U-shaped frame 19 along the support column 26 to ensure that the contact surface of the ground carbon brush and the commutator or the slip ring is perfectly matched.

[0041] The worker rotates the hand wheel 16, the rotating force is reduced and increased in torque through the gear reducer, which is converted into greater torque output, which drives the grinding mold 2 to rotate through the drive shaft 15, and the carbon brush clamped on the carbon brush clamp 21 is ground through the sandpaper 6. During the grinding process, the worker can adjust the rotation speed and direction of the hand wheel 16 as needed to control the rotation speed and grinding force of the grinding mold 2. With the rotation and friction of the grinding mold, the surface of the carbon brush is gradually ground into the required shape and finish.

[0042] When installing the sandpaper 6, first insert one end of the sandpaper 6 into the installation slot 13, and roll it on the mold cylinder 8 starting from the installation slot 13, and tighten and fix it through a pair of straps 14.

[0043] The thimble 4 is on the limiting groove at one end of the grinding rod 7, and the other end of the grinding rod 7 is inserted into the grinding installation groove of the drive shaft 15 and locked and fixed by the locking pin. In this way, when the drive shaft 15 rotates, the grinding rod 7 also rotates.

Claims

1. An electric motor carbon brush sharpening tool characterized by Includes a grinding frame (1), a grinding mold (2), and a carbon brush holder (3). A pin (4) is provided on one side of the grinding frame (1), and a hand-cranked transmission mechanism (5) is provided on the other side of the grinding frame (1). Sandpaper (6) is wrapped around the grinding mold (2). The grinding mold (2) is installed between the pin (4) and the hand-cranked transmission mechanism (5). The hand-cranked transmission mechanism (5) drives the grinding mold (2) to rotate. The carbon brush holder (3) is placed on one side of the grinding mold (2). The carbon brush of the motor is clamped and fixed on the carbon brush holder (3). The carbon brush holder (3) drives the carbon brush of the motor to contact the sandpaper (6) for grinding.

2. A motor carbon brush sharpening tool according to claim 1 wherein, The grinding mold (2) includes a grinding rod (7), a mold cylinder (8), a fixing nut (9) and a locking nut (10). The grinding rod (7) has a thread on the outer wall of one end and a limit ring (11) on the outer wall of the other end. The mold cylinder (8) has a limit plate (12) at both ends. The mold cylinder (8) has an installation hole. The mold cylinder (8) is fitted onto the grinding rod (7). One end of the mold cylinder (8) rests on the limit ring (11). The fixing nut (9) and the locking nut (10) are respectively installed on the thread at one end of the grinding rod (7). The fixing nut (9) presses the mold cylinder (8) tightly and fixes it. The locking nut (10) presses the fixing nut (9) and locks it. Sandpaper (6) is wrapped around the mold cylinder (8).

3. A motor carbon brush sharpening tool according to claim 2, wherein, An installation seam (13) is opened on the outer wall of the mold cylinder (8). One end of the sandpaper (6) is inserted into the installation seam (13) and rolled onto the mold cylinder (8) starting from the installation seam (13). It is then tightened and fixed by a pair of cable ties (14).

4. A motor carbon brush sharpening tool according to claim 3, wherein, One end of the grinding rod (7) has a limiting groove for use with the ejector pin (4), and the other end of the grinding rod (7) has a pin hole. The hand crank transmission mechanism (5) includes a drive shaft (15) and a handwheel (16). The drive shaft (15) is movably mounted on the grinding frame (1) through a bearing. One end of the drive shaft (15) has a grinding mounting groove with a pin hole. The other end of the grinding rod (7) is located in the grinding mounting groove. The locking pin is inserted into the pin hole to fix the other end of the grinding rod (7) in the grinding mounting groove of the drive shaft (15). The other end of the drive shaft (15) is connected to the handwheel (16) through a gear reducer.

5. A motor carbon brush sharpening tool according to claim 4, wherein, A pin mounting platform (17) is provided on the grinding machine frame (1). A pin hole is opened on the side wall of the pin mounting platform (17). A threaded hole is opened on the top of the pin mounting platform (17). The pin (4) is located in the pin hole. The locking screw is screwed into the threaded hole to press and fix the pin (4).

6. An electric motor carbon brush sharpening tool according to claim 5, wherein, The carbon brush holder (3) includes a holder bracket (18), a U-shaped frame (19) and a crossbar (20). The U-shaped frame (19) is installed on the top of the holder bracket (18), and a carbon brush clamp (21) is provided on the crossbar (20) to hold and fix the carbon brush.

7. A motor carbon brush sharpening tool according to claim 6, wherein, Two ends of the U-shaped frame (19) are respectively provided with angle adjusting plates (22), the angle adjusting plates (22) are provided with arc adjusting grooves (23), the two ends of the cross rod (20) are respectively provided with threaded holes, the arc adjusting grooves (23) are provided with adjusting screws (24), and the adjusting screws (24) are screwed into the threaded holes of the ends of the cross rod (20) to fix the cross rod (20).

8. A motor carbon brush sharpening tool according to claim 7, wherein, The clamp support (18) is composed of a support plate (25) and a support column (26), the bottom of the support column (26) is installed on the support plate (25), the middle of the U-shaped frame (19) is provided with an adjusting sleeve (27), the outer wall of the adjusting sleeve (27) is provided with a locking hole, the support column (26) is located in the adjusting sleeve (27), and a locking screw is screwed into the locking hole to fix the U-shaped frame (19) on the support column (26).

9. A motor carbon brush sharpening tool according to claim 8, wherein, The support plate (25) is a triangular support plate.

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