Wrapping type brush holder structure

Abstract

The utility model provides a wrapping type brush holder structure which comprises a brush box, and the interior of the brush box is in sliding connection with a brush body used for making contact with the surface of a sliding way. A spring is installed in the brush box, the two ends of the spring abut against the brush body and a spring pressing plate respectively, and a plurality of inner hexagon bolts penetrate through the spring pressing plate to be in threaded connection with the brush box. The wrapped brush holder structure provided by the utility model has the advantages that the spring is resistant to vibration, the radial run-out capability is strong, and the failure of the device caused by spring breakage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of brush holders, in particular to a wrapped brush holder structure. Background Art

[0002] The function of a brush holder is to apply pressure to the carbon brush that slides in contact with the surface of a commutator or slip ring through a spring, so as to stably conduct current between a fixed body and a rotating body; in the lightning protection technology of a wind turbine, carbon brushes are generally installed at the pitch gear and the hub main shaft bearing, and the lightning current is transferred from the blade - hub - nacelle through the sliding contact between the carbon brush and components such as the hub main shaft, flange, and bearing, so as to realize the diversion of the lightning current from the rotating part to the stationary part.

[0003] At present, for the lightning protection grounding device used in domestic wind turbines, the slideway shaft diameter is very large, and it is usually composed of multiple profiles spliced together, resulting in very poor concentricity, very large surface runout, and obvious steps at the splicing seam. Directly after the grounding device is installed and used, the carbon brush repeatedly jumps up and down in the brush box, eventually causing the spring coil to break and the product to fail. In the case of untimely inspection, it may cause major accidents.

[0004] Therefore, it is necessary to provide a new wrapped brush holder structure to solve the above technical problems. Content of the Utility Model

[0005] The technical problem solved by the utility model is to provide a wrapped brush holder structure with a spring that is resistant to vibration, has strong radial runout ability, and will not cause the device to fail due to spring breakage.

[0006] To solve the above technical problems, the wrapped brush holder structure provided by the utility model includes: a brush box, and a brush body that is slidably connected inside the brush box and is used to contact the surface of the slideway; a spring is installed inside the brush box, and both ends of the spring respectively abut against the brush body and a spring pressing plate, and a plurality of socket head cap screws penetrate through the spring pressing plate and are threadedly connected to the brush box.

[0007] Preferably, a chute is provided inside the brush box, the spring is compressed inside the chute, and the brush body is slidably connected to the chute.

[0008] Preferably, the cross - section of the side wall of the brush body is in a "T" shape, and the cross - section of the top end of the brush body is the same as the inner cross - section of the chute.

[0009] Preferably, a cylindrical pin is installed on the bottom side wall of the brush box, and the cylindrical pin abuts against the top side wall of the brush body.

[0010] Preferably, a plurality of carbon brush wires penetrate through the chute and are electrically connected to the brush body, and a terminal is installed at the top end of the carbon brush wire.

[0011] Compared with the related art, the wrapped brush holder structure provided by the utility model has the following beneficial effects:

[0012] The utility model provides a wrapped brush holder structure, the interior of the brush box is provided with the slide groove, the brush body is slidably connected to the brush body, and the brush is easy to maintain and replace; the spring is compressed by the spring pressure plate inside the slide groove, and the spring is fixed inside the brush box as a whole, and the slide groove plays a guiding role, and the spring will not move or deflect, so that the spring is vibration-resistant and has strong radial runout ability, and the spring will not break and cause device failure; the limit pin is installed inside the brush box to limit the top of the brush body, so as to ensure that the brush body will not directly fall out of the brush box when installed, and the brush body will stop in the brush box after the wear is over, and will not continue to descend to cause the wire buried in the brush body and the slideway to wear and damage the slideway. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A structural schematic diagram of a preferred embodiment of the wrapped brush holder structure provided by the utility model;

[0014] Figure 2 for Figure 1 The schematic diagram of the internal structure of the brush box shown;

[0015] Figure 3 for Figure 1 A front view of the internal structure of the brush box is shown.

[0016] Numbers in the figure: 1, brush body, 2, brush box, 3, spring, 4, spring pressure plate, 5, hexagon socket bolt, 6, cylindrical pin, 7, carbon brush wire, 8, terminal, 9, slide groove. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0018] See also Figures 1 to 3 , Figure 1 A structural schematic diagram of a preferred embodiment of the wrapped brush holder structure provided by the utility model; Figure 2 for Figure 1 The schematic diagram of the internal structure of the brush box shown; Figure 3 for Figure 1Front view of the internal structure of the brush box shown. The wrapped brush holder structure includes: a brush box 2, and a brush body 1 that is slidably connected inside the brush box 2 and is used to contact the surface of the slideway; a spring 3 is installed inside the brush box 2, and both ends of the spring 3 respectively abut against the brush body 1 and a spring pressure plate 4. A plurality of socket head cap screws 5 penetrate through the spring pressure plate 4 and are threadedly connected to the brush box 2. A chute 9 is provided inside the brush box 2. The spring 3 is compressed inside the chute 9, and the brush body 1 is slidably connected to the chute 9. The spring 3 is compressed inside the brush box 2 by the spring pressure plate 4. One end of the spring 3 abuts against the brush body 1, pressing the brush body 1 tightly against the surface of the slideway, leading the lightning current out of the wind power equipment through the brush body 1. And the chute 9 plays a guiding role, so that the spring 3 will not move and be deflected, making the spring 3 vibration-resistant and having strong radial runout ability, and there will be no spring breakage resulting in device failure.

[0019] The cross-section of the side wall of the brush body 1 is in a "T" shape, and the cross-section of the top end of the brush body 1 is the same as the internal cross-section of the chute 9, in order to facilitate the linear movement of the brush body 1 inside the chute 9 and avoid the brush body 1 shaking inside the chute 9.

[0020] A cylindrical pin 6 is installed on the bottom side wall of the brush box 2, and the cylindrical pin 6 abuts against the top side wall of the brush body 1. The cylindrical pin 6 limits the top end of the brush body 1 to ensure that the brush body 1 will not directly come out of the brush box 2 during installation, and after the brush body 1 is worn out, it will stop in the brush box 2 and will not continue to move downward, resulting in wear of the carbon brush wire 7 buried in the brush body 1 and the slideway, damaging the slideway.

[0021] Multiple carbon brush wires 7 penetrate through the chute 9 and are electrically connected to the brush body 1, and a terminal 8 is installed at the top end of the carbon brush wire 7. In order to facilitate the connection of the terminal 8 to the ground, the lightning current led out through the brush body 1 is introduced into the ground through the carbon brush wire 7 and the terminal 8.

[0022] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A wrapped brush holder structure, characterized in that Comprising: A brush box (2), inside which a brush body (1) that is slidably connected and used to contact the surface of the slideway is provided; a spring (3) is installed inside the brush box (2), and both ends of the spring (3) respectively abut against the brush body (1) and a spring pressing plate (4), and a plurality of socket head cap screws (5) penetrate through the spring pressing plate (4) and are threadedly connected to the brush box (2).

2. The wrapped brush holder structure according to claim 1, wherein A chute (9) is provided inside the brush box (2), the spring (3) is compressed inside the chute (9), and the brush body (1) is slidably connected to the chute (9).

3. The wrapped brush holder structure according to claim 2, characterized in that, The cross-section of the side wall of the brush body (1) is in a "T" shape, and the cross-section of the top end of the brush body (1) is the same as the inner cross-section of the chute (9).

4. The wrapped brush holder structure according to claim 1, characterized in that, A cylindrical pin (6) is installed on the bottom side wall of the brush box (2), and the cylindrical pin (6) abuts against the top side wall of the brush body (1).

5. The wrapped brush holder structure according to claim 2, wherein, A plurality of carbon brush wires (7) penetrate through the chute (9) and are electrically connected to the brush body (1), and a terminal (8) is installed at the top end of the carbon brush wire (7).

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