阅读说明：本技术 一种碳刷锁定机构及刷握 (Carbon brush locking mechanism and brush holder ) 是由 王天子 陈翔 卢军 于 2019-12-24 设计创作，主要内容包括：本发明属于刷握技术领域,公开了一种碳刷锁定机构及刷握,该碳刷锁定机构包括压板、操动部及第一弹性元件；压板上设置有与碳刷对应设置的压头；压板具有第一工作位置和第二工作位置,当压板处于第一工作位置时,压头将碳刷锁定于压头和碳刷盒的内壁之间,当压板处于第二工作位置时,压头与碳刷分离以解锁碳刷；操动部能对压板施加外力使压板处于第二工作位置；第一弹性元件在压板处于第二工作位置时能够发生弹性变形,并在操动部的外力撤销后能够恢复变形以使压板恢复并保持于第一工作位置。本发明可便于人工通过操动碳刷锁定机构的操动部锁定或解锁碳刷,以在定期对碳刷进行检修或更换时拔出刷握的过程中,被锁定的碳刷不会被卷簧顶出碳刷盒。(The invention belongs to the technical field of brush holders and discloses a carbon brush locking mechanism and a brush holder, wherein the carbon brush locking mechanism comprises a pressing plate, an operating part and a first elastic element; a pressure head arranged corresponding to the carbon brush is arranged on the pressure plate; the pressure plate is provided with a first working position and a second working position, when the pressure plate is located at the first working position, the pressure head locks the carbon brush between the pressure head and the inner wall of the carbon brush box, and when the pressure plate is located at the second working position, the pressure head is separated from the carbon brush to unlock the carbon brush; the operating part can apply external force to the pressing plate to enable the pressing plate to be in a second working position; the first elastic element can generate elastic deformation when the pressure plate is at the second working position, and can recover deformation after the external force of the operating part is removed so as to recover and keep the pressure plate at the first working position. The invention can be convenient for manually locking or unlocking the carbon brush through the operating part of the carbon brush locking mechanism, so that the locked carbon brush can not be ejected out of the carbon brush box by the coil spring in the process of pulling out the brush holder when the carbon brush is periodically overhauled or replaced.)

1. The utility model provides a carbon brush locking mechanical system for with the activity set up carbon brush (2) in carbon brush box (1) lock in on carbon brush box (1), its characterized in that, carbon brush locking mechanical system includes:

the carbon brush carbon; the pressing plate (3) is provided with a first working position and a second working position, when the pressing plate (3) is located at the first working position, the pressing head (4) abuts against the carbon brush (2) and locks the carbon brush (2) between the pressing head (4) and the inner wall of the carbon brush box (1), and when the pressing plate (3) is located at the second working position, the pressing head (4) is separated from the carbon brush (2) to unlock the carbon brush (2);

the operating part (6) is used for applying external force to the pressing plate (3) so as to enable the pressing plate (3) to be in the second working position; and

a first elastic element (5) connected or abutted to the pressure plate (3); the first elastic element (5) can be elastically deformed when the pressure plate (3) is in the second working position, and can be restored to be deformed after the external force of the operating part (6) is removed so that the pressure plate (3) is restored and kept in the first working position.

2. The carbon brush lock mechanism according to claim 1, wherein: the pressure head (4) comprises a pressing block (41) and a second elastic element (42), the pressing block (41) is movably connected with the pressing plate (3), and two ends of the second elastic element (42) are respectively abutted to the pressing block (41) and the pressing plate (3), so that the pressing block (41) can move relative to the pressing plate (3) when abutted to the carbon brush (2).

3. The carbon brush lock mechanism according to claim 2, wherein: the number of the pressure heads (4) is multiple, and the pressure heads (4) are arranged in the carbon brush boxes (1) in a one-to-one correspondence mode with the carbon brushes (2).

4. The carbon brush lock mechanism according to claim 2, wherein: the pressing head (4) further comprises a guide post (43) penetrating through the pressing plate (3), one end of the guide post (43) is fixedly connected with the pressing block (41), a limiting part (44) capable of preventing the guide post (43) from being separated from the pressing plate (3) is arranged at the other end of the guide post (43), and the second elastic element (42) is a spring sleeved on the guide post (43).

5. The carbon brush lock mechanism according to any one of claims 1 to 4, wherein: the first elastic element (5) is an elastic sheet fixedly connected with the carbon brush box (1), and the pressing plate (3) is fixedly connected with the elastic sheet.

6. The carbon brush lock mechanism according to claim 5, wherein: the spring plate and the pressing plate (3) are respectively provided with a first end portion (10) and a second end portion (20) which are respectively located on two sides of the joint of the spring plate and the carbon brush box (1), the first end portion (10) of the pressing plate (3) is opposite to the carbon brush (2), and the pressing head (4) is arranged at the first end portion (10) of the pressing plate (3).

7. The carbon brush locking mechanism according to claim 6, wherein the operating portion (6) can press against the second end portion (20) of the pressing plate (3) to enable the pressing plate (3) to be in the second working position after moving in the forward direction, and enable the elastic sheet to store energy, and when the operating portion (6) is separated from the second end portion (20) of the pressing plate (3), the elastic sheet is reset to enable the pressing plate (3) to be in the first working position after moving in the reverse direction.

8. The carbon brush locking mechanism according to claim 6, wherein the operating portion (6) includes an operating rod rotatably connected to the carbon brush cartridge (1), the operating rod being capable of pressing against the second end portion (20) of the pressing plate (3) and having a groove (61) capable of avoiding the pressing plate (3) after rotation thereof.

9. The carbon brush lock mechanism according to claim 2, wherein an end surface of the press piece (41) that abuts against the carbon brush (2) is provided with an anti-slip pattern (411), and an extending direction of the anti-slip pattern (411) is perpendicular to a sliding direction of the carbon brush (2).

10. A brush holder, characterized by comprising a carbon brush box (1), a carbon brush (2) and a carbon brush locking mechanism according to any one of claims 1-9.

Technical Field

The invention relates to the technical field of brush holders, in particular to a carbon brush locking mechanism and a brush holder.

Background

The carbon brush is a device for transmitting energy or signals between the fixed part and the rotating part of the motor or the generator, the carbon brush is movably arranged in a carbon brush box of the brush holder, and a coil spring in the carbon brush box is abutted against the carbon brush so as to enable the carbon brush to be abutted against the rotor. Because the carbon brush needs to be in frictional contact with the ring surface of the rotating part of the motor or the generator when the carbon brush works, the worn carbon brush needs to be overhauled or replaced by pulling out the brush holder periodically by hand, so that the motor or the generator keeps good working performance.

In order to not interrupt the operation of the equipment, the maintenance of the carbon brush is usually performed without stopping the equipment. During the process of disassembling and pulling out the brush holder, the carbon brush may be pressed to form unstable contact (such as point contact) with the ring surface due to the abutting action of the coil spring, so that the ring surface is ignited, and the injury to personnel and units is caused.

Therefore, the above problems need to be solved.

Disclosure of Invention

The invention aims to provide a carbon brush locking mechanism and a brush holder, which can lock a carbon brush in a carbon brush box so as to be convenient for overhauling and replacing the carbon brush or the brush holder.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a carbon brush locking mechanical system for with the activity set up the carbon brush in the carbon brush box lock in on the carbon brush box, carbon brush locking mechanical system includes:

the pressing plate is provided with a pressing head, and the pressing head is arranged corresponding to the carbon brush; the pressing plate is provided with a first working position and a second working position, when the pressing plate is located at the first working position, the pressing head abuts against the carbon brush and locks the carbon brush between the pressing head and the inner wall of the carbon brush box, and when the pressing plate is located at the second working position, the pressing head is separated from the carbon brush to unlock the carbon brush;

the operating part is used for applying external force to the pressure plate so as to enable the pressure plate to be in the second working position;

the first elastic element is connected or abutted to the pressing plate; the first elastic element can be elastically deformed when the pressure plate is at the second working position, and can be restored to be deformed after the external force of the operating part is removed so that the pressure plate is restored and kept at the first working position.

Preferably, the pressure head comprises a pressing block and a second elastic element, the pressing block is movably connected with the pressing plate, and two ends of the second elastic element are respectively abutted to the pressing block and the pressing plate, so that the pressing block can move relative to the pressing plate when abutted to the carbon brush.

Preferably, the number of the pressure heads is multiple, and the pressure heads and the carbon brushes arranged in the carbon brush boxes are arranged in a one-to-one correspondence mode.

Preferably, the pressing head further comprises a guide pillar penetrating through the pressing plate, one end of the guide pillar is fixedly connected with the pressing block, the other end of the guide pillar is provided with a limiting portion capable of preventing the guide pillar from being separated from the pressing plate, and the second elastic element is a spring sleeved on the guide pillar.

Preferably, the first elastic element is an elastic sheet fixedly connected with the carbon brush box, and the pressing plate is fixedly connected with the elastic sheet.

Preferably, the spring plate and the pressing plate are respectively provided with a first end portion and a second end portion which are respectively located on two sides of a connection position of the spring plate and the carbon brush box, the first end portion of the pressing plate is opposite to the carbon brush, and the pressing head is arranged at the first end portion of the pressing plate.

Preferably, the operating portion can press against the second end portion of the pressing plate to enable the pressing plate to be located at the second working position after moving in the forward direction, the elastic piece is enabled to store energy, and when the operating portion is separated from the second end portion of the pressing plate, the elastic piece resets to enable the pressing plate to be located at the first working position after moving in the reverse direction.

Preferably, the operating part comprises an operating rod rotatably connected with the carbon brush box, and the operating rod can be abutted against the second end part of the pressing plate and is provided with a groove which can avoid the pressing plate after the operating rod rotates.

Preferably, the end face of the press block, which is used for abutting against the carbon brush, is provided with an anti-slip pattern, and the extending direction of the anti-slip pattern is perpendicular to the sliding direction of the carbon brush.

The invention adopts the following technical scheme:

a brush holder comprises a carbon brush box, a carbon brush and the carbon brush locking mechanism.

The invention has the beneficial effects that:

the carbon brush locking mechanism and the brush holder provided by the invention can be used for conveniently locking or unlocking the carbon brush manually through the operating part of the carbon brush locking mechanism, so that the locked carbon brush cannot be ejected out of the carbon brush box by the coil spring in the process of pulling out the brush holder when the carbon brush is overhauled or replaced periodically, the phenomenon that the carbon brush is pressed to the annular surface of the motor or the generator by the coil spring to form unstable contact to cause annular surface sparking and the like is avoided, and the safety performance of the brush holder and an equipment unit is improved.

Drawings

FIG. 1 is a schematic view of a brush holder according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a matching structure of a carbon brush locking mechanism and a carbon brush box according to an embodiment of the invention;

fig. 3 is an enlarged schematic view of a structure at a in fig. 2.

In the figure:

100. a brush holder;

1. a carbon brush box; 11. a carbon brush tank; 2. a coil spring; 3. pressing a plate; 4. a pressure head; 41. briquetting; 411. anti-skid lines; 42. a second elastic element; 43. a guide post; 44. a limiting part; 5. a first elastic element; 6. an operating part; 61. a groove;

10. a first end portion; 20. a second end portion.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Referring to fig. 1 and 2, the brush holder 100 includes a carbon brush box 1, a carbon brush 2, and a carbon brush locking mechanism. The carbon brush 2 is movably disposed in a carbon brush groove 11 in the carbon brush box 1 and abuts against a coil spring (not shown) fixed in the carbon brush box 1, so that when the brush holder 100 is assembled on a motor or a generator, the carbon brush 2 abuts against a ring surface (hereinafter referred to as a ring surface) of a rotating portion of the motor or the generator and compresses the coil spring, and further, the carbon brush keeps surface contact with the ring surface under the reverse abutting action of the coil spring, so as to transmit energy or signals between the fixed portion and the rotating portion of the motor or the generator.

When the brush holder 100 is pulled out manually and periodically to repair or replace the carbon brush 2, the carbon brush locking mechanism can effectively lock the carbon brush 2, and the carbon brush 2 is prevented from being ejected out of the carbon brush box 1 by the coil spring in the process of disassembling and pulling out the brush holder 100.

Specifically, the carbon brush locking mechanism includes a pressing plate 3, a first elastic element 5, and an operating part 6.

The pressure head 4 is arranged on the pressure plate 3, and the pressure head 4 is arranged corresponding to the carbon brush 2 movably arranged in the brush holder 100. The pressing plate 3 has a first working position and a second working position, and when the pressing plate 3 is in the first working position, the pressing head 4 abuts against the carbon brush 2 and locks the carbon brush 2 between the pressing head 4 and the inner wall of the carbon brush box 1, so that the brush holder 100 is pulled out after the carbon brush 2 is locked. When the platen 3 is in the second working position, the indenter 4 is separated from the carbon brush 2 to unlock the carbon brush 2.

The operating part 6 is used for applying an external force to the pressure plate 3 to make the pressure plate 3 in the second working position.

The first elastic element 5 is connected or abutted to the pressure plate 3. The first elastic element 5 can be elastically deformed when the pressure plate 3 is in the second working position, and can be deformed again after the external force of the operating part 6 is removed so as to restore and maintain the pressure plate 3 in the first working position.

By the above structure, in the working process after the carbon brush 2 is assembled to the motor or the generator along with the brush holder 100, the operating part 6 can make the press plate 3 be in the second working position for a long time, so that the carbon brush 2 can be pressed by the coil spring to contact with the ring surface. When the carbon brush 2 or other structures of the brush holder 100 are repaired or replaced, the operating part 6 can be manually operated to remove the external force applied to the pressing plate 3 by the operating part 6, so that the first elastic element 5 can be restored to deform to restore and maintain the pressing plate 3 at the first working position to lock the carbon brush 2, so that the locked carbon brush cannot be ejected out of the carbon brush box 1 by the coil spring in the process of pulling out the brush holder. The carbon brush 2 can be removed for replacement or maintenance by manually operating the operating part 6 again to apply external force to the pressing plate 3 to unlock the carbon brush 2.

Alternatively, the pressure plate 3 may be made of a rigid metal or non-metal material so that it is not deformed when the operated portion 6 is operated and the carbon brush 2 is pressed by the pressing head 4, thereby being capable of effectively transmitting the pressure to the carbon brush 2.

Alternatively, the first elastic element 5 may be an elastic sheet fixedly connected with the carbon brush box 1, and the pressing plate 3 is fixedly connected with the elastic sheet, so that after the pressing plate 3 is manually operated directly or indirectly through the operation portion 6, the pressing plate 3 can drive the elastic sheet to generate deformation and store energy, so that when the operation portion 6 no longer operates the pressing plate 3, the elastic sheet resets and reversely drives the pressing plate 3 to reset. Of course, in other alternative embodiments, the first elastic element 5 may also be a spring or other elastic element.

In this implementation, the elastic sheet and the pressing plate 3 both have a first end portion 10 and a second end portion 20 respectively located at two sides of a connection portion between the elastic sheet and the carbon brush box 1, the first end portion 10 of the pressing plate 3 is arranged opposite to the carbon brush 2, and all the pressing heads 4 are arranged at the first end portion 10 of the pressing plate 3.

As shown in fig. 2, in the present embodiment, the operating part 6 includes an operating rod rotatably connected to the carbon brush box 1, and the operating rod can press the second end 20 of the pressing plate 3 and has a groove 61 which can escape from the pressing plate 3 after the operating rod rotates. When the operating portion 6 (operating rod) abuts against the second end portion 20 of the pressing plate 3, the pressing plate 3 is located at the second working position after moving in the forward direction (clockwise direction in fig. 2), the carbon brush 2 is unlocked, the elastic sheet stores energy, when the operating portion 6 is separated from the second end portion 20 of the pressing plate 3 (the second end portion 20 of the pressing plate 3 is accommodated in the groove 61), the elastic sheet resets to enable the pressing plate 3 to be located at the first working position after moving in the reverse direction (counterclockwise direction in fig. 2), and the carbon brush 2 is locked.

Optionally, the second end portion 20 of the pressing plate 3 may have a warping portion for contacting and matching with the operating rod, and the warping portion extends towards the operating rod, so as to increase a downward moving distance of the second end portion 20 of the pressing plate 3 when the operating rod is rotated to abut against the pressing plate 3, that is, increase a moving distance of the first end portion 10 of the pressing plate to drive the pressing head 4 upwards, and ensure that the pressing head 4 is separated from the carbon brush 2.

In an optional embodiment, the position of the elastic sheet and the first end portion 10 of the pressing plate 3 may be configured to have a first distance from the carbon brush 2, so that the pressing head 4 presses downward on the carbon brush 2 and locks the carbon brush 2 in cooperation with the inner wall of the carbon brush box 1 without an external force, and the carbon brush 2 may be unlocked by pulling the first end portion 10 of the pressing plate 3 upward through the operating portion 6. Or, because the elastic sheet has a twistable characteristic, the first end 10 of the pressure plate 3 can be lifted upwards by the operation part 6 pressing downwards against the second end 20 of the pressure plate 3, so as to unlock the carbon brush 2.

In another alternative embodiment, the position of the spring plate and the first end portion 10 of the pressure plate 3 may be configured to have a second distance larger than the first distance from the carbon brush 2, so that the pressure head 4 does not contact the carbon brush 2 and is in an unlocked state without an external force, and the pressure head 4 is pressed against the carbon brush 2 and is matched with the inner wall of the carbon brush box 1 to lock the carbon brush 2 by the operation portion 6 pressing downward against the first end portion 10 of the pressure plate 3. Alternatively, the first end portion 10 of the pressure plate 3 may be pressed downward by pulling the second end portion 20 of the pressure plate 3 upward by the operating portion 6, thereby locking the carbon brush 2.

Similarly to the platen 3, in order to ensure effective locking of the carbon brush 2, the structure of the indenter 4 for pressing the carbon brush 2 is also preferably made of a rigid metal or non-metal material.

In order to prevent the carbon brush 2 from being damaged by excessive pressure transmitted by the first elastic element 5 to the rigid pressure head 4 when the pressure plate 3 is in the first working position. The pressure head 4 may include a pressing block 41 and a second elastic element 42, the pressing block 41 is movably connected to the pressure plate 3, and two ends of the second elastic element 42 are respectively connected to or abutted against the pressing block 41 and the pressure plate 3, so that the pressing block 41 can move relative to the pressure plate 3 when abutting against the carbon brush 2, and the redundant pressure transmitted to the pressure head 4 by the first elastic element 5 is absorbed through the elastic deformation energy storage of the second elastic element 42.

Generally, a plurality of carbon brush grooves 11 may be provided in the carbon brush box 1 to mount a plurality of carbon brushes 2. When the carbon brushes 2 work, energy and signal transmission is carried out between the carbon brushes 2 and the ring surface in a surface friction contact mode, the ring surface is always in a rotating state, and the carbon brushes 2 are kept in contact with the ring surface by means of the stretching elastic force of the coil springs, so that the surfaces of the carbon brushes 2, which are used for being in press fit with the pressure head 4, are often not in the same plane, namely the positions of the carbon brushes 2 are often uneven. If each of the pressing heads 4 is rigidly fixed to the platen 3, the surfaces of each of the pressing heads 4 for press-fitting with the carbon brushes 2 are located on the same plane. Then, when a rigid strip-shaped pressure head 4 or a plurality of rigidly fixed pressure heads 4 are matched with and lock a plurality of carbon brushes 2 with uneven positions together, after a part of the pressure head 4 in the strip-shaped pressure head 4 or the plurality of pressure heads 4 is pressed against the carbon brush 2 located at the highest point, the pressure plate 3 cannot move continuously towards the carbon brush 2, that is, the carbon brush 2 located at the low point cannot be pressed by the pressure head 4, and thus effective locking cannot be achieved.

Therefore, as shown in fig. 1, in this embodiment, the number of the pressing heads 4 may also be multiple, so as to match the number of the carbon brushes 2 in the carbon brush box 1, and the multiple pressing heads 4 are disposed in one-to-one correspondence with the multiple carbon brushes 2 disposed in the carbon brush box 1, so that when the carbon brush locking mechanism locks the multiple carbon brushes 2 with uneven positions, in the process that the pressing plate 3 moves toward the carbon brushes 2, a part of the pressing heads 4 in the multiple pressing heads 4 may first abut against the carbon brushes 2 located at the high point, and the second elastic element 42 may contract and deform, so as to allow the pressing plate 3 to continue to move downward, so that the carbon brushes 2 located at the high point to the low point are successively abutted by the pressing heads 4, and it is ensured that all the carbon brushes 2 are effectively locked to the carbon brush box 1.

Optionally, as shown in fig. 3, the pressing head 4 may further include a guide post 43 disposed through the pressing plate 3, one end of the guide post 43 is fixedly connected to the pressing block 41, the other end of the guide post 43 is disposed with a limiting portion 44 capable of preventing the guide post 43 from being separated from the pressing plate 3, and the second elastic element 42 is a spring sleeved on the guide post 43. The guide post 43 and the pressing plate 3 with a certain thickness can form a linear sliding fit, so that the moving direction of the pressing head 4 is limited, and the pressing block 41 is prevented from floating and dislocating when the spring is compressed or extended. Further, the movable distance of the pressure piece 41 can be indirectly configured by configuring the length of the guide post 43 to be adapted to the carbon brushes 2 and the like of different size specifications.

Alternatively, the end surface of the segment 41 that abuts against the carbon brush 2 may be provided with an anti-slip pattern 411 to increase the static friction force between the segment 41 and the carbon brush 2 when the segment 41 abuts against the carbon brush 2. Preferably, the extending direction of the anti-slip stripes 411 may be perpendicular to the sliding direction of the carbon brush 2.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.