Bunch brush for conductive slip ring and pressure maintaining device thereof

Abstract

The utility model discloses a bundle brush for a conductive slip ring and a pressure maintaining device thereof, the bundle brush comprises a plurality of conductive fibers and a fixing sleeve sleeved outside the conductive fibers, and the conductive fibers are wave-shaped or spiral; the pressure maintaining device comprises a brush base and a brush arm, hinge lugs are arranged on the front side and the rear side of the brush base and hinged to one end of the brush arm through a pin shaft, a torsional spring matched with the pin shaft is arranged between the brush base and the brush arm, and the bundle brush is fixedly arranged at the top of the other end of the brush arm. According to the utility model, the conductive fibers are used, so that the bundle brush has many contacts, each contact can conduct current, the current density is large, the electric brush reduces heating, and each conductive fiber has small and stable contact resistance and can well transmit various signals; the conductive fibers are arranged to be spiral or wave-shaped, so that the end face of the bundle brush is elastic, the bundle brush can still run stably in a high-rotating-speed state, and the noise is low; meanwhile, small initial contact pressure is designed through the pressure maintaining device, and the service life of the conductive friction pair is obviously prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of conductive slip rings, specifically relating to a brush for conductive slip rings and its pressure maintaining device. Background Technology

[0002] A slip ring is an electromechanical component that transmits current and data signals from a fixed device to a rotating device. It is also called a conductive ring, collector ring, current collector ring, brush, rotary electrical joint, or electrical rotor. A slip ring is a precision power transmission device that uses the sliding contact, electrostatic coupling, or electromagnetic coupling of a conductive ring to transmit electrical signals and energy between rotating and rolling or sliding parts on a fixed frame. It is widely used in all electromechanical systems requiring unrestricted, continuous, or intermittent 360-degree rotation and multiple paths for rotational power, data, and signals. It greatly simplifies the system structure and prevents wires from twisting during rotation. A brush, as a component of a slip ring, is simply a calibrated metal wire housed in a metal tube, with its unconstrained end attached to a groove on the surface of the slip ring body to achieve electrical contact with the slip ring body.

[0003] With industrial development, the requirements for slip ring speed are getting higher and higher, as are the requirements for electrical contact performance and lifespan. Traditional brushes and carbon brushes can no longer meet these requirements. Utility Model Content

[0004] The purpose of this invention is to provide a conductive slip ring brush and its pressure maintaining device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A conductive slip ring brush includes a plurality of conductive fibers and a fixing sleeve sleeved over the conductive fibers, wherein the conductive fibers are wavy or spiral.

[0007] Preferably, the fixing sleeve includes an integrally formed pressing part and an extension part. The diameter of the pressing part is smaller than the diameter of the extension part. The pressing part is fixedly connected to one end of the conductive fiber filament. The length of the conductive fiber filament is greater than the axial length of the fixing sleeve. The other end of the conductive fiber filament extends along the extension part to the outside of the fixing sleeve.

[0008] Preferably, a metal mesh sleeve is embedded between the extension portion and the conductive fiber filament, and the metal mesh sleeve is fitted over the conductive fiber filament.

[0009] Preferably, the sum of the cross-sectional areas of all the conductive fibers accounts for a predetermined proportion of the extended portion.

[0010] A pressure holding device for a conductive slip ring brush includes a brush holder and a brush arm. Hinges are provided on the front and rear sides of the brush holder. The hinges are hinged to one end of the brush arm by a pin. A torsion spring is provided between the brush holder and the brush arm with a matching pin. The brush is fixedly mounted on the top of the other end of the brush arm.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] By using conductive fiber filaments, the brush has many contacts, each of which can conduct current with a high current density. This reduces the heat generated by the brush, and the contact resistance of each conductive fiber filament is small and stable, which can effectively transmit various signals.

[0013] By setting the conductive fiber filaments into a spiral or wavy shape, the end face of the brush is made elastic, which can maintain stable operation and low noise even at high speed.

[0014] Meanwhile, by designing a pressure holding device with a smaller initial contact pressure, the service life of the conductive friction pair is significantly extended. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the spiral conductive fiber filaments in the brush bundle.

[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of the wavy conductive fiber filaments in the brush bundle.

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the brush bundle.

[0018] Figure 4 This is a three-dimensional structural diagram of the pressure holding device.

[0019] Figure 5 This is a schematic diagram showing the fit between the brush and pressure holding device and the slip ring body.

[0020] Figure description: 1-Brush bundle, 21-Clamping part, 22-Extension part, 23-Metal mesh sleeve, 3-Conductive fiber filament, 4-Brush base, 5-Brush arm, 6-Pin shaft, 7-Torsion spring. Detailed Implementation

[0021] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] Reference Figure 3As shown, a conductive slip ring brush includes a plurality of conductive fibers and a fixed sleeve sleeved over the conductive fibers. The length of the conductive fibers is greater than the axial length of the fixed sleeve. One end of the conductive fibers is disposed inside the fixed sleeve and is pressed and fixed by the fixed sleeve to prevent the conductive fibers from sliding relative to the fixed sleeve. The other end of the conductive fibers is disposed outside the fixed sleeve so that the unrestrained end of the brush can attach to the groove on the surface of the slip ring body to achieve electrical contact with the slip ring body.

[0023] In this invention, the conductive fiber uses a metal wire with a diameter of less than 0.25 mm, and the metal wire is spiral or wavy, such as... Figure 1-Figure 2 As shown. The metal wire can be a pure metal wire, an alloy metal wire, or other filament made of conductive materials.

[0024] In this embodiment, refer to Figure 3 As shown, the fixing sleeve includes a clamping part and an extension part. The clamping part is integrally connected to the lower part of the extension part. The lower ends of all conductive fiber filaments are disposed in the fixing sleeve, and the lower ends of the conductive fiber filaments are clamped and fixed by the clamping part. The inner diameter of the clamping part is smaller than the inner diameter of the extension part, so that the sum of the cross-sectional areas of all conductive fiber filaments accounts for a preset proportion of the extension part, which is the filling rate of the conductive fiber filaments in the brush. At this time, the conductive fiber filaments in the extension part are diffused relative to the conductive fiber filaments in the clamping part, ensuring that all conductive fiber filaments are still elastic when they are gathered and fixed together, and their tips can still move relative to each other.

[0025] It should be noted that Figure 3 The diagram only shows a few conductive fibers to illustrate their relationship with the fixing sleeve, and the exact number of these conductive fibers cannot be determined.

[0026] In this invention, the spiral or wavy conductive fiber filaments forming the brush bundle give the brush end face a certain elasticity, which can ensure that each filament is in contact with the ring track and that each contact point can conduct current. The contact resistance is small and the current density is large. In addition, the contact surface of the brush bundle corresponding to the ring track surface is relatively soft, which can reduce the noise of the slip ring operation.

[0027] The contact end face of the brush can be made into any shape, such as round, square, rectangular, hexagonal, etc., and those skilled in the art can set it according to the actual situation.

[0028] Furthermore, a metal mesh sleeve is embedded in the extension section, which surrounds all conductive fiber filaments, and the top of the metal mesh sleeve is flush with the end of the conductive fiber filament, ensuring the reliability of the contact between the end face of the brush and the surface of the ring channel.

[0029] In addition, refer to Figures 4-5This utility model also provides a pressure maintaining device for the brush bundle to ensure the contact pressure of each conductive fiber filament in the brush bundle. The device includes a brush base and a brush arm. Hinges are integrally provided on the front and rear sides of the brush base. The hinges are hinged to the left end of the brush arm by a pin. A torsion spring is provided between the brush base and the brush arm in cooperation with the pin. The brush bundle is fixedly installed on the top of the right end of the brush arm.

[0030] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A brush for a conductive slip ring, characterized in that, It includes a plurality of conductive fiber filaments and a fixing sleeve sleeved over the conductive fiber filaments. The conductive fiber filaments are wavy or spiral. The fixing sleeve includes an integrally formed clamping part and an extension part. The diameter of the clamping part is smaller than the diameter of the extension part. The clamping part is fixedly connected to one end of the conductive fiber filament. The length of the conductive fiber filament is greater than the axial length of the fixing sleeve. The other end of the conductive fiber filament extends along the extension part to the outside of the fixing sleeve.

2. The conductive slip ring brush as described in claim 1, characterized in that, A metal mesh sleeve is embedded between the extension portion and the conductive fiber filament, and the metal mesh sleeve is fitted over the conductive fiber filament.

3. The conductive slip ring brush as described in claim 1, characterized in that, The sum of the cross-sectional areas of all the conductive fibers accounts for a predetermined proportion of the extension portion.

4. A pressure maintaining device using the brush bundle according to any one of claims 1-3, characterized in that, It includes a brush holder and a brush arm. The brush holder has hinges on both the front and rear sides. The hinges are hinged to one end of the brush arm by a pin. A torsion spring is set between the brush holder and the brush arm with a matching pin. The brush bundle is fixedly set on the top of the other end of the brush arm.

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