CN116845657A

CN116845657A - Grounding carbon brush slot type mounting and releasing mechanism

Info

Publication number: CN116845657A
Application number: CN202310733228.0A
Authority: CN
Inventors: 殷立鹏; 史志伟
Original assignee: TRIS (ZHENJIANG) CARBON CO Ltd
Current assignee: TRIS (ZHENJIANG) CARBON CO Ltd
Priority date: 2023-06-20
Filing date: 2023-06-20
Publication date: 2023-10-03

Abstract

The invention relates to a grounding carbon brush slot type mounting and releasing mechanism, which comprises a carbon brush support, a grounding carbon brush, a spring and a bolt, wherein the carbon brush support is of an integrated stamping forming structure; the spring is arranged in the carbon brush support, two ends of the spring are respectively propped against one end of the carbon brush support and one end of the brush body and used for supporting the brush body, so that after the plug pin is pulled out, the grounding carbon brush is freely released and ejected in the limited direction of the shell under the action of the spring force, and the end face of the grounding carbon brush is in stable sliding contact with the main shaft. The carbon brush of the brush holder assembly is fixed and released by the bolt, so that the installation and the carbon brush release of the grounding carbon brush holder assembly on the motor spindle are facilitated.

Description

Grounding carbon brush slot type mounting and releasing mechanism

Technical Field

The invention relates to a carbon brush installation and release mechanism, in particular to a slot type installation and release mechanism of a grounding carbon brush assembly for electric drive of a new energy vehicle.

Background

The motor of the new energy automobile usually generates shaft current on the motor shaft during operation, and the shaft current is current flowing through the motor shaft, the bearing and the motor housing. In the actual working use of the motor, because of the existence of motor shaft current, the shaft current flowing through the bearing can produce electric corrosion on the bearing, so that the bearing works unstably, and then the bearing temperature is increased to cause premature failure. In order to protect the bearings, it is necessary to conduct the motor shaft current to ground (the motor housing is connected to the body ground) by contacting the motor shaft with the motor shaft through conductors mounted on the motor housing so that the shaft current does not flow through the bearings.

The common exciting motor needs a brush to be matched with a slip ring, current is transmitted to a rotor through the brush through the rotating slip ring, or alternating current is generated on a main shaft in the running process of a high-power motor assembly (such as a new energy vehicle electric drive), and a grounding brush is needed to be introduced to lead out shaft current. The electric brush needs to be fixed with the machine body through a fixing device, so that the sliding surface of the electric brush is ensured to be in stable contact with the slip ring or the main shaft in the whole life cycle of the electric brush. The conventional brush fixing module is composed of a brush holder, a brush and a spring, the brush is assembled in the brush holder assembly, and the brush can be stably contacted with the slip ring or the main shaft under the pressure of the spring and can move in a single direction in a fixing space of the brush holder along with the abrasion of the brush.

The existing brush fixing module has the defects that the brush can naturally pop up and protrude out of the brush frame under the action of spring force, and because the brush protrudes out of the brush holder for a long distance, the brush needs to be temporarily plugged back into the brush holder, and the brush holder assembly is released when being moved to the vicinity of the slip ring or the main shaft, all the steps are carried out simultaneously, and the elasticity of the spring causes considerable interference to installation. The existing release mechanisms of some brushes can realize the function of releasing the brushes by utilizing the cooperation of the protruding sheets of the inner brush frame and the outer brush frame and the special structure of the brushes after the superposition assembly of two composite brackets, the bracket structure is complex, the brackets also need the composite superposition assembly, the waste of materials and working hours and the cost is high.

Disclosure of Invention

The invention discloses a grounding carbon brush slot type mounting and releasing mechanism, wherein the grounding brush frame assembly is used for fixing carbon brushes in a carbon brush support in the packaging and transportation processes, so that carbon brush damage caused by extending the carbon brushes out of the brush frame and inconvenience in packaging and transportation can be avoided to the greatest extent, the carbon brushes can be released freely after the brush frame is mounted, and the inconvenience that the brush frame is mounted in place after the carbon brushes are pressed back when the brush holder is mounted in the traditional mounting mode is solved.

The specific technical scheme is as follows:

the grounding carbon brush slot type mounting and releasing mechanism comprises a carbon brush support, a grounding carbon brush, a spring and a bolt, wherein the carbon brush support is of an integrated stamping forming structure, the carbon brush support is of a square cladding structure, one end of the carbon brush support is provided with an opening and is embedded with the grounding carbon brush, the grounding carbon brush comprises a brush body and a brush braid wire, the brush body is embedded in the carbon brush support, one side of the brush body is provided with a groove for inserting the bolt, one sides of the top end and the bottom end of the carbon brush support are provided with through holes corresponding to the positions of the grooves, the bolt is longitudinally embedded in the through holes, and the lower end of the bolt is embedded in the groove and positions the brush body; one end of the brush body is connected with one end of the brush braid wire, and the other end of the brush braid wire is connected with one end of the carbon brush bracket; the spring is arranged in the carbon brush support and sleeved on the outer side of the brush braid, two ends of the spring are respectively propped against one end of the carbon brush support and one end of the brush body and used for supporting the brush body, so that after the plug pin is pulled out, the grounding carbon brush is freely released and ejected in the limited direction of the shell under the action of the spring force, and the end face of the grounding carbon brush is in stable sliding contact with the main shaft.

Further, the carbon brush support is of a rectangular shell structure and comprises a top plate, side plates and a bottom plate, the front end of the bottom plate is bent outwards to form a lower folded plate, the side plates are integrally connected with the bottom plate, the bottom ends of the side plates are attached to the top plate, and the front end of the side plate is bent inwards to form a front end plate; the front end of the top plate is bent inwards to form a front support plate, the front support plate is located on the inner side of the front end plate and is attached to the inner wall of the front end plate, and the front support plate is of a U-shaped structure.

Further, the top plate of the carbon brush support horizontally extends to form a straight plate, the straight plate is integrally connected with the top plate, and at least one screw fixing hole for assembling with the motor is formed in the straight plate.

Further, a bayonet is arranged at the joint between the straight plate and the top plate, a clamping plate matched with the bayonet is arranged at the bottom end of the side plate, and the clamping plate is longitudinally embedded into the bayonet.

Further, the junction between straight board and the roof is equipped with the locating hole, locating hole one end and screw fixed orifices intercommunication, curb plate bottom level buckle be equipped with in locating plate of locating hole looks adaptation, and the one end of locating plate be the arc indent setting and with screw fixed orifices inner wall parallel and level.

Further, one end of the brush braid wire penetrates through the front end plate of the carbon brush support and forms a connecting point on the outer wall of the front end plate.

Further, the cross section shape of the carbon brush support is matched with the cross section shape of the grounding carbon brush.

Further, the bolt comprises a vertical end and a bending end, the vertical end is longitudinally embedded into the socket and the notch, and the bending end abuts against the outer side of the socket to limit.

The beneficial effects of the invention are as follows:

(1) According to the invention, the bolt is adopted to complete the fixation and release of the carbon brush of the brush holder assembly, so that the carbon brush is conveniently fixed in the carbon brush support by the grounding carbon brush holder assembly in the packaging box transportation process, the damage caused by the fact that the carbon brush stretches out of the brush holder and the inconvenience of packaging and transportation are avoided, and the installation and the carbon brush release on a motor main shaft are facilitated.

(2) The carbon brush support and the bolt are formed by stamping metal plates, and the grooves of the carbon brush can be formed by a die, so that the manufacturing cost is low.

(3) The carbon brush support adopts straight board cooperation fastener to fix with the motor to adopt the structure of cardboard cooperation bayonet socket between carbon brush support's curb plate and the straight board can effectively improve the structural strength of cover shell, through locating plate and locating hole cooperation, can prevent that straight board from taking place to warp.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a side view of the present invention.

Fig. 3 is a front view of the present invention.

Fig. 4 is a rear view of the present invention.

Fig. 5 is a schematic view of the bottom structure of the present invention.

Fig. 6 is a schematic view of a back surface structure of the grounding carbon brush according to the present invention when the grounding carbon brush is installed.

Fig. 7 is a schematic front view of the grounding brush according to the present invention.

Fig. 8 is a schematic view showing a structure of the brush holder assembly for a grounding brush according to the present invention when it is mounted to a motor spindle.

Carbon brush holder 1, top plate 101, side plate 102, bottom plate 103, lower folded plate 104, front end plate 105, front support plate 106, connection point 107, straight plate 11, screw fixing hole 111, through hole 12, clamping plate 13, bayonet 14, positioning hole 15, positioning plate 16, grounding carbon brush 2, brush body 21, groove 211, brush braid 22, spring 3, plug pin 4, vertical end 41, bent end 42, motor spindle 5.

Detailed Description

In order to make the technical scheme of the invention clearer and more definite, the invention is further described below with reference to the accompanying drawings, and any scheme obtained by carrying out equivalent substitution and conventional reasoning on the technical characteristics of the technical scheme of the invention falls into the protection scope of the invention. The fixed connection mentioned in the invention is a common connection mode in the mechanical field, and the fixed connection can be realized by welding, bolt-nut connection and screw connection.

In the description of the invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the invention.

As shown in fig. 1-7, the slot type installation and release mechanism of the grounding carbon brush 2 comprises a carbon brush support 1, the grounding carbon brush 2, a spring 3 and a bolt 4, wherein the carbon brush support 1 is of an integral stamping forming structure, the carbon brush support 1 is of a square surrounding shell structure formed by integrally metal sheets, the carbon brush support 1 is of a rectangular shell structure, the carbon brush support 1 comprises a top plate 101, a side plate 102 and a bottom plate 103, the front end of the bottom plate 103 is bent outwards to form a lower folded plate 104, the side plate 102 is integrally connected with the bottom plate 103, the bottom end of the side plate 102 is attached to the top plate 101, and the front end of the side plate 102 is bent inwards to form a front end plate 105; the roof 101 one side with straight board 11 body coupling, roof 101 front end is inwards buckled and is equipped with preceding extension board 106, preceding extension board 106 is located the inboard of front end board 105 and sets up with front end board 105 inner wall laminating, plays the supporting role, and preceding extension board 106 is U-shaped structure.

The top plate 101 side horizontal extension of carbon brush support 1 is equipped with straight board 11, and straight board 11 is connected as an organic whole with top plate 101, offer at least one screw fixed orifices 111 that is used for with motor assembly on the straight board 11, the junction between straight board 11 and the top plate 101 is equipped with bayonet socket 14, the curb plate 102 bottom be equipped with bayonet socket 14 looks adaptation cardboard 13, cardboard 13 longitudinal embedding sets up in bayonet socket 14. The junction between straight board 11 and roof 101 is equipped with locating hole 15, locating hole 15 one end and screw fixed orifices 111 intercommunication, curb plate 102 bottom level buckle be equipped with in locating plate 16 of locating hole 15 looks adaptation, and the one end of locating plate 16 be the arc indent setting and with screw fixed orifices 111 inner wall parallel and level to improve the structural strength of straight board 11, prevent to warp.

The carbon brush support 1 one end is the opening setting and imbeds and set up ground connection carbon brush 2, the cross-sectional shape of carbon brush support 1 and the cross-sectional shape phase-match of ground connection carbon brush 2, ground connection carbon brush 2 comprises the brush body 21 and the brush pigtail 22 of powder suppression, the brush body 21 material is not limited, be metal graphite composite material in this embodiment, the brush body 21 imbeds and sets up in carbon brush support 1, the brush body 21 side is equipped with a recess 211 that is used for bolt 4 male, recess 211 top-down sets up, this recess 211 can be realized by powder one-time press forming or processing, small-size rectangle through-hole 12 corresponding to recess 211 position is offered to one side of carbon brush support 1 top and bottom, vertically imbed in through-hole 12 and set up bolt 4, bolt 4 lower extreme imbeds in recess 211 and fixes a position brush body 21, bolt 4 includes vertical end 41 and bending end 42, vertical embedding sets up in socket and notch, bending end 42 supports and leans on the socket outside and carries out spacing. The shape of the bolt 4 is preferably L-shaped, T-shaped and the like so as to be convenient to take out, and the bolt 4 is formed by sheet metal processing, and can be realized by other material processing forming or production (such as injection molding and the like) processes.

One end of the brush body 21 is connected with one end of a braid wire 22, and the braid wire 22 is a twisted wire or a braided wire formed by oxygen-free copper wires and can be provided with a plating layer; the brush braid 22 and the brush body 21 may be buried or fixed with powder when the carbon brush is formed, the other end of the brush braid 22 penetrates through the front end plate 105 of the carbon brush support 1 and forms a connection point 107 on the outer wall of the front end plate 105, the connection point is arranged in a protruding manner or is flush with the front end plate 105, and the connection point 107 between one end of the carbon brush support 1 and the brush braid 22 is preferably connected by soldering tin; the spring 3 is disposed in the carbon brush support 1 and sleeved outside the braid 22, in this embodiment, the spring 3 is preferably a cylindrical helical compression spring 3, and two ends of the spring 3 respectively support one end of the carbon brush support 1 and one end of the brush body 21 and are used for supporting the brush body 21.

After the grounding carbon brush 2 and the spring 3 are assembled into the carbon brush support 1, and the brush braid 22 of the grounding carbon brush 2 is reliably connected with the carbon brush support 1, the grounding carbon brush 2 is pushed into the carbon brush support 1, when the position of the groove 211 of the grounding carbon brush 2 is overlapped with the rectangular through hole of the carbon brush support 1, the bolt 4 is inserted, the carbon brush is not ejected any more, the grounding carbon brush 2 cannot be ejected out of the brush holder, subsequent assembly is facilitated, and assembly of the brush holder assembly of the grounding carbon brush 2 is completed.

As shown in fig. 8, after the brush frame assembly of the grounding carbon brush 2 is assembled, the plug 4 is pulled out at this time, and the grounding carbon brush 2 is released and ejected freely along the direction defined by the casing under the action of the spring 3, so that the end face of the grounding carbon brush 2 is in stable sliding contact with the motor spindle 5.

The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. The grounding carbon brush (2) slot type mounting and releasing mechanism is characterized by comprising a carbon brush support (1), a grounding carbon brush (2), a spring (3) and a plug pin (4), wherein the carbon brush support (1) is of an integrated stamping forming structure, the carbon brush support (1) is of a square cladding structure, one end of the carbon brush support (1) is provided with an opening and is embedded into the grounding carbon brush (2), the grounding carbon brush (2) comprises a brush body (21) and a brush braid wire (22), the brush body (21) is embedded into the carbon brush support (1), one side of the brush body (21) is provided with a groove (211) for inserting the plug pin (4), a through hole (12) corresponding to the position of the groove (211) is formed in the carbon brush support (1), the plug pin (4) is longitudinally embedded into the through hole (12), and the lower end of the plug pin (4) is embedded into the groove (211) and positions the brush body (21). One end of the brush body (21) is connected with one end of the brush braid wire (22), and the other end of the brush braid wire (22) is connected with one end of the carbon brush bracket (1); the spring (3) is arranged in the carbon brush support (1) and sleeved outside the brush braid (22), two ends of the spring (3) are respectively propped against one end of the carbon brush support (1) and one end of the brush body (21) and used for supporting the brush body (21), so that after the plug pin (4) is pulled out, the grounding carbon brush (2) is freely released and ejected in the direction limited by the shell under the action of the spring (3), and the end face of the grounding carbon brush (2) is in stable sliding contact with the main shaft.

2. The grounding carbon brush (2) slot type mounting and releasing mechanism according to claim 1, wherein the carbon brush support (1) is of a rectangular shell structure, the carbon brush support (1) comprises a top plate (101), side plates (102) and a bottom plate (103), the front end of the bottom plate (103) is bent outwards to form a lower folded plate (104), the side plates (102) and the bottom plate (103) are integrally connected, the bottom ends of the side plates (102) are attached to the top plate (101), and the front end of the side plates (102) is bent inwards to form a front end plate (105); front end inboard buckling of roof (101) is equipped with preceding extension board (106), preceding extension board (106) are located the inboard of front end board (105) and with front end board (105) inner wall laminating setting, preceding extension board (106) are U-shaped structure.

3. The grounding carbon brush (2) slot-in type mounting and releasing mechanism according to claim 2, characterized in that a straight plate (11) is horizontally extended on one side of a top plate (101) of the carbon brush support (1), the straight plate (11) is integrally connected with the top plate (101), and at least one screw fixing hole (111) for assembling with a motor is formed in the straight plate (11).

4. A grounding carbon brush (2) slot-in mounting and releasing mechanism according to claim 3, characterized in that a bayonet (14) is arranged at the joint between the straight plate (11) and the top plate (101), a clamping plate (13) matched with the bayonet (14) is arranged at the bottom end of the side plate (102), and the clamping plate (13) is longitudinally embedded in the bayonet (14).

5. The grounding carbon brush (2) slot-in type mounting and releasing mechanism according to claim 3, characterized in that a positioning opening (15) is arranged at the joint between the straight plate (11) and the top plate (101), one end of the positioning opening (15) is communicated with the screw fixing hole (111), the bottom end of the side plate (102) is horizontally bent and provided with a positioning plate (16) which is matched with the positioning opening (15), and one end of the positioning plate (16) is arranged in an arc-shaped indent and is flush with the inner wall of the screw fixing hole (111).

6. The grounding brush (2) slot-in mounting and releasing mechanism according to claim 1, characterized in that one end of the brush lead (22) penetrates the front end plate (105) of the brush holder (1) and forms a connection point (107) on the outer wall of the front end plate (105).

7. The grounding brush (2) slot-in mounting and releasing mechanism according to claim 1, characterized in that the cross-sectional shape of the brush holder (1) matches the cross-sectional shape of the grounding brush (2).

8. The grounding carbon brush (2) slot-in mounting and releasing mechanism according to claim 1, characterized in that the plug pin (4) comprises a vertical end (41) and a bending end (42), the vertical end (41) is longitudinally embedded in the socket and the notch, and the bending end (42) abuts against the outer side of the socket for limiting.