CN209767333U

CN209767333U - brush motor and carbon brush holder thereof

Info

Publication number: CN209767333U
Application number: CN201920958110.7U
Authority: CN
Inventors: 果嘉琛; 张春飞; 周勇
Original assignee: Jiangsu Leili Motor Co Ltd
Current assignee: Jiangsu Leili Motor Co Ltd
Priority date: 2019-06-21
Filing date: 2019-06-21
Publication date: 2019-12-10
Anticipated expiration: 2029-06-21

Abstract

The utility model discloses a brush motor and a carbon brush holder thereof, which comprises a body and a fixing frame arranged on the body and used for fixing a thermal protector; the end face of one side of the fixing frame, which is vertical to the body, is provided with an insertion hole suitable for the thermal protector to be inserted into the fixing frame; and a heat dissipation hollow-out opening is arranged on at least one side end face of the rest of the side end faces connected with the side end face where the insertion opening is located on the fixing frame. The utility model discloses a brush motor and carbon brush frame thereof for the mount of fixed hot protector, the hot protector that can be convenient for is installed in the mount, still is favorable to increasing the surface area of hot protector and air contact simultaneously, improves the heat transfer effect of mount, thereby improves the response sensitivity of hot protector in the use.

Description

brush motor and carbon brush holder thereof

Technical Field

The utility model relates to the technical field of electric machines, especially, relate to a brush motor and carbon brush frame thereof.

Background

For example, dc brushed motors used in treadmill lift motors require a thermal protector to be installed within the motor. In the prior art, a special thermal protector mounting frame is not provided for a motor, such as CN201710576850.X, CN201020532846.7 and CN201320261805.2, and a flat thermal protector (such as kw9700 type) cannot be mechanically fixed well; although some motors have structures for fixing the thermal protector, such as CN107070058A, CN108092468A, and CN201813055U, the heat transfer effect of the fixing structure of the thermal protector is poor, which affects the response sensitivity of the thermal protector during use, and the thermal protector is not stably installed, and the thermal protector is easily detached from the fixing structure.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a carbon brush frame to solve the technical problem to the response sensitivity in the thermal protector use that improves on the carbon brush frame.

A second object of the present invention is to provide a brush motor to solve the technical problem of response sensitivity to the thermal protector in use on the carbon brush holder.

The utility model discloses a carbon brush holder realizes like this:

a carbon brush holder adapted for use with a brushed electrical machine, comprising: the thermal protector comprises a body and a fixing frame which is arranged on the body and used for fixing the thermal protector;

The end face of one side of the fixing frame, which is vertical to the body, is provided with an insertion hole suitable for the thermal protector to be inserted into the fixing frame; and

and a heat dissipation hollow-out opening is arranged on at least one side end face of the rest of the side end faces connected with the side end face where the insertion opening is positioned on the fixing frame.

In a preferred embodiment of the present invention, the thermal protector is a flat thermal protector; and

the fixing frame adopts a cuboid structure;

And heat dissipation hollows are respectively arranged on the top end surface, the bottom end surface and one side end surface of the other four side end surfaces, which are connected with the side end surface where the insertion hole is located, of the cuboid structure.

In the preferred embodiment of the present invention, a rounded corner structure is disposed at the edge of the insertion hole;

In a preferred embodiment of the present invention, at least one of the heat dissipating hollowed-out openings respectively formed on the top end surface, the bottom end surface and one side end surface has a width larger than that of the flat thermal protector; and

The radiating hollow-out opening with the width larger than that of the flat thermal protector is provided with a spigot which is suitable for abutting against the flat thermal protector at the edge far away from the insertion opening.

in a preferred embodiment of the present invention, the flat thermal protector is provided with a first thermal protector lead wire and a second thermal protector lead wire on an end surface adapted to be located outside the insertion opening; wherein

and the outgoing line of the second thermal protector is vertical to the end face of the flat thermal protector in the length direction.

in a preferred embodiment of the present invention, the carbon brush holder further comprises a carbon brush assembly;

the carbon brush assembly comprises a carbon brush groove arranged on the body, a carbon brush suitable for being embedded in the carbon brush groove, and a carbon brush lead-out wire arranged on the carbon brush;

The carbon brush outgoing line is suitable for being connected with the first thermal protector outgoing line.

In a preferred embodiment of the present invention, a pair of rectangular bosses are provided on the top end surface of the carbon brush groove.

in a preferred embodiment of the present invention, a pair of cylindrical bosses are provided on the top end surface of the carbon brush groove.

In a preferred embodiment of the present invention, the carbon brush holder is further provided with a circular truncated cone structure; the circular truncated cone structure is provided with a hollow circular hole along the axial direction;

and after the carbon brush outgoing line and the first thermal protector outgoing line are in compression joint through the copper terminal, the carbon brush outgoing line and the first thermal protector outgoing line are suitable for being embedded into the round hole.

The utility model discloses a brush motor is realized like this:

A brush motor comprises the carbon brush holder.

By adopting the technical scheme, the utility model discloses following beneficial effect has: the utility model discloses a there is brush motor and carbon brush frame thereof, through on the mount with be equipped with the heat dissipation fretwork mouth on at least one side end face in all the other a plurality of side end faces that the side end face at inserted hole place links to each other, the heat dissipation fretwork mouth is favorable to increasing the surface area of hot protector and air contact, improves the heat transfer effect of mount to improve the response sensitivity of hot protector in the use. The edge of the insertion hole is provided with a fillet structure, so that the process of inserting the thermal protector into the fixing frame can be guided, and the assembly line installation is facilitated.

furthermore, a seam allowance suitable for abutting against the flat thermal protector is arranged at the edge far away from the insertion hole of the heat dissipation hollowed-out opening with the width larger than that of the flat thermal protector, so that the thermal protector can be prevented from sliding out along the axial direction of the motor.

drawings

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

fig. 2 is a schematic structural view of a carbon brush holder according to the present invention in a state where the carbon brush is connected to a thermal protector;

Fig. 3 is a schematic structural view of a fixing frame and a carbon brush groove of the carbon brush holder according to the present invention;

FIG. 4 is a schematic top view of the carbon brush holder according to the present invention;

Fig. 5 is a schematic view of the structure in direction a of fig. 4.

In the figure: the heat dissipation device comprises a body 1, a fixing frame 2, an insertion opening 3, a fillet structure 5, a heat dissipation hollowed-out opening 6, a flat type thermal protector 7, a spigot 8, a first thermal protector outgoing line 9, a second thermal protector outgoing line 11, a carbon brush groove 12, a carbon brush 13, a carbon brush outgoing line 16, an inlet 17, a notch 18, a rectangular boss 19, a cylindrical boss 20, a round platform structure 21, a copper terminal 22, a screw abdicating groove 25 and a round hole 27.

Detailed Description

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings.

Example 1:

Referring to fig. 1 to 5, the present embodiment provides a carbon brush holder for a brush motor, including: the thermal protector comprises a body 1 and a fixing frame 2 which is arranged on the body 1 and used for fixing the thermal protector. Specifically, the inside of the fixing frame 2 is a hollow cavity for accommodating the thermal protector. The end face of one side of the fixed frame 2, which is vertical to the body 1, is provided with an insertion hole 3 suitable for the thermal protector to be inserted into the fixed frame 2; and a heat dissipation hollow-out opening 6 is arranged on at least one side end face of the rest side end faces connected with the side end face where the insertion opening 3 is positioned on the fixing frame 2.

In detail, the thermal protector adopted in the present embodiment takes a flat thermal protector 7 as an example; and the fixing frame 2 adopts a cuboid structure corresponding to the flat thermal protector 7. For the fixing frame 2 with a rectangular parallelepiped structure, the heat dissipation hollowed-out openings 6 are respectively arranged on the top end surface, the bottom end surface and one side end surface of the rest four side end surfaces, which are connected to the side end surface where the insertion port 3 is located, of the fixing frame 2 with the rectangular parallelepiped structure, that is, for the fixing frame 2 with the rectangular parallelepiped structure, three heat dissipation hollowed-out openings 6 are provided, but here, the heat dissipation hollowed-out openings 6 may be two heat dissipation hollowed-out openings 6, or even four heat dissipation hollowed-out openings 6, which is not absolutely limited in this embodiment.

In a preferred embodiment, a rounded structure 5 is provided at the edge of the insertion opening 3; the process that the thermal protector inserts in the mount can be guided to the assembly line installation of being convenient for.

For the fixing frame 2 with a cuboid structure, the flat thermal protector 7 is inserted into the fixing frame 2 along the length direction of the fixing frame 2 with the cuboid structure, in view of improving the stability of the flat thermal protector 7 after being inserted into the fixing frame 2 and preventing the flat thermal protector 7 from being separated from the fixing frame 2, at least one radiating hollowed-out opening 6 in the radiating hollowed-out openings 6 respectively arranged on the top end surface, the bottom end surface and one side end surface is wider than the flat thermal protector 7; and a spigot 8 suitable for abutting against the flat thermal protector 7 is arranged on the edge of the heat dissipation hollowed-out opening 6 with the width larger than that of the flat thermal protector 7, which is far away from the insertion opening 3.

the end face of the flat thermal protector 7, which is suitable for being positioned outside the insertion opening 3, is provided with a first thermal protector outgoing line 9 and a second thermal protector outgoing line 11; wherein the second thermal protector outlet 11 is adapted to extend the motor as one of the external connection lines. The second thermal protector lead wire 11 is perpendicular to the end face of the flat thermal protector 7 in the longitudinal direction, in other words, the second thermal protector lead wire 11 is perpendicular to the insertion direction of the flat thermal protector 7 when inserted into the holder 2. Under such a structure, the potential stress direction of the second thermal protector outgoing line 11 of the flat thermal protector 7 is perpendicular to the insertion direction of the flat thermal protector 7, so that when the second thermal protector outgoing line 11 is pulled by the outside, the flat thermal protector 7 cannot be directly separated from the fixing frame 2, the purpose of fixing the flat thermal protector 7 can be achieved, and the fixing effect of the flat thermal protector 7 in the fixing frame 2 is improved.

More specifically, the carbon brush holder of the embodiment further comprises a carbon brush assembly; the carbon brush assembly comprises a carbon brush groove 12 arranged on the body 1, a carbon brush 13 suitable for being embedded in the carbon brush groove 12, and a carbon brush lead-out wire 16 arranged on the carbon brush 13; the carbon brush lead-out wire 16 is adapted to be connected to the first thermal protector lead-out wire 9.

The side end face of the carbon brush groove 12 perpendicular to the body 1 is provided with an inlet 17 suitable for inserting the carbon brush 13 into the carbon brush groove 12; and a notch 18 which is communicated with the inlet 17 and is suitable for extending the carbon brush lead wire 16 is arranged on the top end surface of the carbon brush groove 12 parallel to the body 1.

In an alternative embodiment, a pair of rectangular bosses 19 are symmetrically arranged on the top end surface of the carbon brush slot 12 and on both sides of the notch 18, and the rectangular bosses 19 are used for preventing the carbon brush lead-out wires 16 from coming out of the carbon brush slot 12 during operation and colliding with a rotor commutator to cause the problem of motor operation failure.

in an alternative embodiment, a pair of cylindrical bosses 20 are symmetrically provided on the top end surface of the carbon brush groove 12 on both sides of the notch 18. It should be noted here that a pair of cylindrical bosses 20 are located on the top end surface of the carbon brush groove 12 at a portion away from the inlet 17, and the cylindrical bosses 20 are used for hooking the carbon brush lead-out wires 16 in advance when the complete machine is assembled, so as to prevent the carbon brush 13 box from being ejected by the spring inside the carbon brush groove 12 and being unable to mount the rotor assembly.

The carbon brush holder is also provided with two circular truncated cone structures 21; the specific circular truncated cone structure 21 is provided with a hollow circular hole 27 along the axial direction; after the carbon brush lead wire 16 and the first thermal protector lead wire 9 are pressed and connected through the copper terminal 22, the carbon brush lead wire is suitable for being embedded into the round hole 27 to limit the position, and the exposed end face is fixed through silica gel.

It should be further noted that the carbon brush holder of the present embodiment further has two screw relief grooves 25 for relieving long screws connecting the upper and lower end caps.

Example 2:

On the basis of the carbon brush holder of embodiment 1, the present embodiment provides an electric motor including the carbon brush holder of embodiment 1.

The above embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above embodiments are only examples of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

in the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the present disclosure, unless otherwise expressly stated or limited, the first feature may comprise both the first and second features directly contacting each other, and also may comprise the first and second features not being directly contacting each other but being in contact with each other by means of further features between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.

Claims

1. A carbon brush holder suitable for a brush motor, comprising: the thermal protector comprises a body and a fixing frame which is arranged on the body and used for fixing the thermal protector;

2. A carbon brush holder according to claim 1, wherein a rounded configuration is provided at the edge of said insertion opening.

3. The carbon brush holder according to claim 1, wherein said thermal protector is a flat thermal protector; and

The fixing frame adopts a cuboid structure;

4. The carbon brush holder according to claim 3, wherein at least one of the heat dissipating cutouts respectively provided on the top end face, the bottom end face, and one of the side end faces has a width larger than that of the flat thermal protector; and

5. The carbon brush holder according to any one of claims 3 or 4, wherein the flat thermal protector is adapted to be provided with a first thermal protector lead wire and a second thermal protector lead wire at an end face located outside the insertion opening; wherein

6. The carbon brush holder according to claim 5, further comprising a carbon brush assembly;

7. a carbon brush holder according to claim 6, wherein a pair of rectangular bosses are provided on the top end surface of the carbon brush groove.

8. a carbon brush holder according to claim 6, wherein a pair of cylindrical bosses are provided on the top end surface of the carbon brush groove.

9. the carbon brush holder according to claim 6, wherein a circular truncated cone structure is further provided on the carbon brush holder; the circular truncated cone structure is provided with a hollow circular hole along the axial direction;

10. A brushed motor, comprising: a carbon brush holder according to any one of claims 1 to 9.