Brush carrier for impact-resistant motor

Abstract

The utility model discloses an anti-impact motor brush holder comprising a bottom plate, the upper end of the bottom plate is symmetrically provided with two limiting frames used for installing carbon brushes, and the upper ends of the two limiting frames are fixedly connected through a gantry support; a gear is rotatably installed in the middle of the lower end of the gantry support, racks are connected to the two sides of the gear in a meshed mode respectively, a guide rod connected with the gantry support in a sliding mode is arranged at one end of each rack, a pushing plate used for pushing a carbon brush is arranged at one end of each guide rod, and the guide rods are sleeved with pushing springs used for pushing the guide rods to move. According to the utility model, the guide rod is pushed to move through the two propulsion springs, so that the thrust applied to the two racks is transmitted to each other through the gear, the thrust applied to the two propulsion plates is the same, and the thrust applied to the carbon brushes by the propulsion plates is the same, so that the abrasion degrees of the two carbon brushes are the same; and each part is not displaced or damaged, so that the stability is relatively high.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, concretely relates to a kind of brush holder for impact-resistant motor. BACKGROUND

[0002] The brush holder is an important component of the motor, and its function is to apply pressure to the brush in sliding contact with the commutator or collector ring surface through the spring, so that it stably conducts current between the fixed body and the rotating body. Under the action of the spring force, the brush is always in contact with the commutator or collector ring surface, so the motor circuit always remains connected.

[0003] In some specific environment, impact-resistant motor is needed to be used, and the brush holder of the impact-resistant motor should also need to have certain protection function, but the conventional brush holder does not have good impact resistance effect, and after being subjected to strong impact, the internal spring and carbon brush are easily displaced, which also causes different degrees of carbon brush wear, so that the motor fails, and it also causes trouble for subsequent maintenance. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of brush holder for impact-resistant motor to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of brush holder for impact-resistant motor, including bottom plate, and the middle part of bottom plate is provided with a round hole for installing commutator, the upper end of bottom plate is symmetrically provided with two limiting frames for installing carbon brush, and the upper end of two limiting frames is fixedly connected through gantry support;

[0006] The lower end of the gantry support is rotatably installed with a gear, and the gear is meshingly connected with a rack on both sides, one end of the rack is provided with a guide rod slidingly connected with the gantry support, one end of the guide rod is provided with a push plate for pushing the carbon brush, the lower end of the push plate is located inside the limiting frame, and the guide rod is provided with a push spring outside.

[0007] Preferably, the guide rod is provided with an extrusion block in the radial direction, and the push spring is compressed between the extrusion block and the gantry support.

[0008] Preferably, the upper end of the limiting frame is provided with a through slot, and the lower end of the push plate penetrates through the through slot and extends into the limiting frame.

[0009] Preferably, the edge of the upper end of the bottom plate is provided with a fence, and the fence has the same height as the gantry support.

[0010] Preferably, the gantry support is provided with a reinforcing plate on both sides, and the reinforcing plate is fixedly connected with the upper end of the fence at both ends.

[0011] The upper end of the fence is provided with a cover plate, and the cover plate is fixedly connected with the reinforcing plate through screws.

[0012] Preferably, the lower end of the portal frame is provided with two guide blocks, and the guide rod is slidingly connected with the guide blocks.

[0013] Preferably, the lower end of the portal frame is provided with two guide blocks, and the guide rod is slidingly connected with the guide blocks.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] The utility model discloses a brush holder, which comprises a bottom plate, a portal frame, a fence, a reinforcing plate, a guide rod, a rack, a gear, a spring and a cover plate. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the whole structure schematic diagram of the utility model;

[0017] Figure 2 It is the explosion structure schematic diagram of the utility model;

[0018] Figure 3 It is the bottom view section of the utility model;

[0019] Figure 4 It is the front view section of the utility model.

[0020] In the drawing: 1, bottom plate;11, limit frame;12, portal frame;13, fence;14, reinforcing plate;15, through slot;16, guide block;2, gear;3, rack;31, guide rod;32, propulsion plate;33, pressing block;4, spring;5, cover plate;51, mounting hole;6, screw. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0022] Please refer toFigures 1-4 The utility model provides a kind of technical scheme: a kind of brush holder for impact resistance motor, including bottom plate 1, and the middle part of bottom plate 1 is equipped with the round hole for installing commutator, the upper end of bottom plate 1 is symmetrically equipped with two limit supports 11 for installing carbon brush, two limit supports 11 upper end is fixedly connected by gantry support 12, the lower end of gantry support 12 is rotatably installed with gear 2, gear 2 both sides are meshed with rack 3, one end of rack 3 is equipped with the guide rod 31 of sliding connection with gantry support 12, the lower end of gantry support 12 is equipped with two guide blocks 16, guide rod 31 is slidingly connected with guide block 16, one end of guide rod 31 is equipped with the propulsion plate 32 for pushing carbon brush, the lower end of propulsion plate 32 is located inside limit support 11, the upper end of limit support 11 is equipped with through slot 15, the lower end of propulsion plate 32 is inserted into limit support 11 by penetrating through through slot 15, guide rod 31 is equipped with propulsion spring 4 outside sleeve, guide rod 31 is equipped with extrusion block 33 in radial direction, and propulsion spring 4 is compressed between extrusion block 33 and gantry support 12.Guide rod 31 is moved on gantry support 12 by the elastic force of propulsion spring 4 after compression.

[0023] Wherein, two limit supports 11 are used to install carbon brush inside, then after carbon brush is installed inside two limit supports 11, the whole brush holder is buckled on commutator of motor main body, so that commutator is inserted into the round hole in the middle of bottom plate 1, so that one end of two carbon brushes is closely attached to the both sides of commutator, at this time, propulsion spring 4 is in compressed state, two propulsion plates 32 are close to fence 13, in the process of motor working, commutator rotates ceaselessly and can wear carbon brush, so that propulsion spring 4 in compressed state moves to center by elastic force, so that guide rod 31 moves to center, so that propulsion plate 32 pushes carbon brush to move to center, so that carbon brush can still contact with commutator stably after wearing, it needs to be noted that, guide rod 31 is moved by two propulsion springs 4, so that two racks 3 are moved, and the thrust of two racks 3 is transmitted to each other by gear 2, so that the thrust of two propulsion plates 32 is same, so that the thrust of carbon brush by propulsion plate 32 is also same, so the wearing degree of two carbon brushes is also same, and after brush holder is impacted or violently vibrated, each component also does not produce displacement or damage, with higher stability.

[0024] The upper end of bottom plate 1 is equipped with fence 13 along edge, and the height of fence 13 is same with gantry support 12, and the both sides of gantry support 12 are equipped with reinforcing plate 14, and the both ends of reinforcing plate 14 are fixedly connected with the upper end of fence 13, and the upper end of fence 13 is equipped with cover plate 5, and cover plate 5 is fixedly connected with reinforcing plate 14 by screw 6, and cover plate 5 is equipped with a plurality of mounting holes 51 for installing with motor main body.

[0025] The fence 13 is used for protecting the inside of the brush holder, can bear the impact force from outside, the upper end of the fence 13 is connected through the reinforcing plate 14, the mechanical strength of the whole can be increased, the cover plate 5 is fixedly installed on the reinforcing plate 14 through the screws 6, the upper end of the brush holder can be protected, and the brush holder is installed with the motor body through the mounting holes 51 in the cover plate 5.

[0026] The working principle and use process of the utility model are as follows:

[0027] After the brush holder is installed on the motor, the advancing spring 4 is in a compressed state, the two advancing plates 32 are close to the fence 13, when the carbon brush is worn, the advancing spring 4 in the compressed state pushes the extrusion block 33 to move to the center through the elastic force, the guide rod 31 moves to the center, the advancing plate 32 pushes the carbon brush to move to the center, the carbon brush can still stably contact the commutator after being worn, it is needed to be emphasized that the guide rod 31 is pushed to move through the two advancing springs 4, the two racks 3 are moved, the thrust received by the two racks 3 is transmitted to the other through the gear 2, the thrust received by the two advancing plates 32 is the same, the thrust of the carbon brush received by the advancing plate 32 is also the same, therefore, the wear degree of the two carbon brushes is also the same, and after the brush holder is impacted or violently vibrated, the parts will not be displaced or damaged, have higher stability, the fence 13 is used for protecting the inside of the brush holder, can bear the impact force from outside, the cover plate 5 is fixedly installed on the reinforcing plate 14 through the screws 6, the upper end of the brush holder can be protected, and the brush holder is installed with the motor body through the mounting holes 51 in the cover plate 5.

[0028] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A brush holder for impact-resistant electric machines, comprising a base plate (1) and a circular hole in the middle of the base plate (1) for mounting a commutator, characterized in that: Two limiting supports (11) for mounting carbon brushes are symmetrically arranged at the upper end of the bottom plate (1), and the upper ends of the two limiting supports (11) are fixedly connected through a gantry support (12); A gear (2) is rotatably arranged at the middle of the lower end of the gantry support (12), the gear (2) is meshingly connected with a rack (3) on both sides, one end of the rack (3) is slidably connected with a guide rod (31) of the gantry support (12), one end of the guide rod (31) is provided with a propelling plate (32) for pushing the carbon brush, the lower end of the propelling plate (32) is located in the limiting support (11), and the guide rod (31) is sleeved with a propelling spring (4) outside.

2. A brush holder for an impact-resistant electric motor according to claim 1, characterized in that: The guide rod (31) is provided with an extrusion block (33) in the radial direction, and the propelling spring (4) is compressed between the extrusion block (33) and the gantry support (12).

3. A brush holder for an impact-resistant electric motor according to claim 1, characterized in that: The upper end of the limiting support (11) is provided with a through slot (15), and the lower end of the propelling plate (32) penetrates through the through slot (15) and extends into the limiting support (11).

4. A brush holder for an impact-resistant electric motor according to claim 1, characterized in that: The upper end of the bottom plate (1) is provided with a surrounding fence (13), and the height of the surrounding fence (13) is the same as that of the gantry support (12).

5. A brush holder for an impact-resistant electric motor according to claim 4, characterized in that: The two sides of the gantry support (12) are provided with reinforcing plates (14), and the two ends of the reinforcing plates (14) are fixedly connected with the upper end of the surrounding fence (13). The upper end of the surrounding fence (13) is provided with a cover plate (5), and the cover plate (5) is fixedly connected with the reinforcing plate (14) through a screw (6).

6. A brush holder for an impact-resistant electric motor according to claim 1, characterized in that: The lower end of the gantry support (12) is provided with two guide blocks (16), and the guide rod (31) is slidably connected with the guide blocks (16).

7. A brush holder for an impact-resistant electric motor according to claim 5, characterized in that: A plurality of mounting holes (51) for mounting the motor body are arranged on the cover plate (5).

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