CN218101984U

CN218101984U - Multipoint contact brush holder structure

Info

Publication number: CN218101984U
Application number: CN202221470571.8U
Authority: CN
Inventors: 李永祥
Original assignee: Shanghai Keya Power Station Spare Parts Co ltd
Current assignee: Shanghai Keya Power Station Spare Parts Co ltd
Priority date: 2022-06-13
Filing date: 2022-06-13
Publication date: 2022-12-20
Anticipated expiration: 2032-06-13

Abstract

The utility model discloses a multi-point contact brush holder structure, which comprises a brush holder body, a base and a multi-point contact body; the multipoint contact body comprises a steel strip, a plurality of contact mounting openings are formed in the middle of the steel strip at equal intervals, a copper contact blade is riveted in each mounting opening at the same angle, one end face of one side of each contact blade is upwarped, and the other end face of the other side of each contact blade is downward protruded to form two contacts which are arranged above and below each other; the base is assembled with the brush holder, and the base is processed with a center hole matched with the multipoint contact body, and the contact and the brush holder on two sides of the multipoint contact body are electrically connected. The utility model discloses can promote the electric contact performance of brush holder.

Description

Multipoint contact brush holder structure

Technical Field

The utility model relates to a brush holder structure of multiple spot contact for motor production field.

Background

With the development of domestic economy, the demand of thermal power is vigorous, and more generator sets are put into operation in a grid-connected mode. The brush holder is taken as an important part of the generator, is closely concerned by field operation and maintenance personnel of a power plant, and puts higher requirements on the use convenience and safety of the brush holder. The common brush holder structure adopts an inclined plane contact structure, the contact surface must be fully ground for the contact surface to be good, the workload is large, in actual application, the condition that the contact surface cannot be fully contacted in continuous use is still likely to occur under the influence of factors such as vibration and the like, so that the electrical corrosion exists on the contact surface, the conductivity is influenced, and the heating problem is caused. How to achieve a more excellent brush holder electrical connection is a major goal of the skilled person.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming prior art's not enough, provide a brush holder structure of multiple spot contact, it has good elasticity and electric contact performance, need not to grind the contact surface, can solve the problem that the inclined plane contact meets well, greatly improves the life of brush holder.

One technical scheme for achieving the above purpose is as follows: a multi-point contact brush holder structure comprises a brush holder body, a base and a multi-point contact body;

the multipoint contact body comprises a steel belt, a plurality of contact mounting openings are formed in the middle of the steel belt at equal intervals, a copper contact blade is riveted in each mounting opening at the same angle, one end face of one side of each contact blade is upwarped, and the other end face of the other side of each contact blade is downwards stretched to form two contacts which are arranged above and below;

the base is assembled with the brush holder, and the base is processed with a center hole matched with the multipoint contact body, and the contact and the brush holder on two sides of the multipoint contact body are electrically connected.

Further, the contact blade angle of the multi-point contact body can be finely adjusted.

Furthermore, the center hole of the base is in one-to-one contact with the contact of each contact blade.

Further, a set of installation breach that relative setting was seted up to the multiple spot contact mounting groove, and the multiple spot contact is from installation breach department joint income multiple spot contact mounting groove, then rotatory messenger's seam is crisscross with the installation breach.

The utility model discloses a structure is held to brush of multiple spot contact processes multiple spot contact mounting groove on the brush is held, installs multiple spot contact on the brush is held, processing and multiple spot contact assorted centre bore on the base. When the multi-point contact is used, the brush holder is arranged on the base, so that the multi-point contact body is in multi-point contact with the base through the contact points on the lifting sides of the contact blades, the brush holder is connected with the base, and a good electrical connection effect is achieved. The utility model provides an electric corrosion and the overheated problem that the contact surface produced when the brush holder used, improved the life of brush holder.

Drawings

Fig. 1 is a schematic structural view of a multi-point contact brush holder structure of the present invention;

fig. 2 is a schematic structural view of a multipoint contact brush holder structure of the present invention without a base;

fig. 3 is an enlarged view of a detail of a mounting groove of a multi-point contact body of a multi-point contact brush holder structure of the present invention;

fig. 4 is a schematic view of an installation notch of a mounting groove of a multi-point contact body of a multi-point contact brush holder structure according to the present invention;

fig. 5 is a schematic view illustrating an assembly of a multipoint contact body mounting body of a multipoint contact brush holder structure according to the present invention;

fig. 6 is a top view of a multi-point contact body of a multi-point contact brush holder structure of the present invention;

fig. 7 is a side view of a multi-point contact body of a multi-point contact brush holder structure of the present invention.

Detailed Description

In order to better understand the technical solution of the present invention, the following detailed description is given by way of specific embodiments:

referring to fig. 1 to 2, a multi-point contact brush holder structure of the present invention includes a brush holder 1, a multi-point contact body 2, and a base 3.

Referring to fig. 6 and 7, the multipoint contact body includes a steel strip 21, a plurality of contact mounting openings are formed in the middle of the steel strip at equal intervals, a copper contact blade 22 is riveted in each mounting opening at the same angle, one end surface of one side of the contact blade is tilted upwards, and the other end surface of the other side of the contact blade is tilted downwards to form two contacts which are arranged upwards and downwards.

In order to optimize the electrical contact between the multi-point contact body 2 and the base 3 and improve the electrical contact performance, the structural form of the end surface of the upper side of the contact blade can be changed in several ways. In a variation of this embodiment, the raised end surface of the contact blade 22 forms an upward-protruding spherical structure, so that the single contact blade and the base form point contact instead of line contact. The angle of the contact blade of the multipoint contact body can be finely adjusted so as to ensure that the multipoint contact body can be in close contact with the electric conductor when being extruded by external force. The central hole of the base is in one-to-one contact with the contacts of the contact blades. The multipoint contact has the advantages that the multipoint contact blade has adjustability, so that the multipoint contact blade can be in better contact with the electric conductor; meanwhile, the conductors are connected through the contact blades for each contact arranged, and the contact blades form a parallel circuit, so that the contact resistance is reduced, and the heat emission is reduced.

Referring to fig. 3 to 5, the brush holder 1 is provided with an annular mounting groove 11 for the multi-point contact body 2. In order to facilitate the installation of the multipoint contact body 2, a group of oppositely arranged installation notches 12 are formed in the multipoint contact body installation groove 11, and the multipoint contact body is embedded in the multipoint contact body installation groove through the installation notches. The base is provided with a central hole matched with the multipoint contact body 2 and is electrically connected with the brush holder.

The specific assembly method is as follows:

step 1: embedding the multipoint contact body into the multipoint contact body installation groove from the installation gap;

step 2: the multipoint contact body is rotated to enable the joint of the multipoint contact body to be staggered with the installation notch, so that the multipoint contact body is prevented from escaping from the multipoint contact body installation groove when in use;

step 2: the brush holder is arranged on the base, and the brush holder and the base are electrically connected through the multipoint contact body.

It should be understood by those skilled in the art that the above embodiments are only used for illustrating the present invention, and not used as a limitation of the present invention, and that the changes and modifications to the above embodiments are all within the scope of the claims of the present invention as long as they are within the spirit of the present invention.

Claims

1. A multi-point contact brush holder structure comprises a brush holder body and a base, and is characterized by also comprising a multi-point contact body;

the multipoint contact body comprises a steel strip, a plurality of contact mounting openings are formed in the middle of the steel strip at equal intervals, a copper contact blade is riveted in each mounting opening at the same angle, one end face of one side of each contact blade is upwarped, and the other end face of the other side of each contact blade is downward protruded to form two contacts which are arranged above and below each other;

2. A multi-point contact brush holder structure according to claim 1, wherein the contact blade angle of the multi-point contact body is finely adjustable.

3. A multi-point contact brush holder structure according to claim 1, wherein the central hole of the base is in one-to-one contact with the contact point of each contact blade.

4. The structure of claim 1, wherein the mounting groove of the multi-point contact body is formed with a plurality of mounting notches arranged oppositely, the multi-point contact body is inserted into the mounting groove of the multi-point contact body from the mounting notch, and then rotated to make the joint line and the mounting notch cross each other.