CN214205258U - Electric corrosion prevention device of plastic package brushless direct current motor - Google Patents

Abstract

The utility model discloses a plastic envelope brushless DC motor prevents electric corrosion device, including front end housing and rear end cap, still include the conductive adhesive tape, the conductive adhesive tape extends to the rear end cap from the front end cap, all be provided with the damping ring on front end housing and the rear end cap, the conductive adhesive tape is compressed tightly between damping ring and front end housing rear end cap. The utility model provides a plastic envelope brushless DC motor prevents electric corrosion device can reduce the axle voltage of eliminating the motor even, prevents that the axle current from producing to play better guard action to the bearing, reduce the bearing noise, prolong the life of bearing.

Description

Electric corrosion prevention device of plastic package brushless direct current motor

Technical Field

The utility model belongs to the technical field of the plastic envelope motor technique and specifically relates to a plastic envelope brushless DC motor prevents electric corrosion device.

Background

In the operation process of the plastic package brushless direct current motor, shaft voltage can be generated between two ends of a rotating shaft, so that shaft current is generated, a lubricating oil film or a lubricating gas film gap minimum position on the surface of a bearing is punctured, a discharging loop is formed, balls and a roller path of an inner wheel and an outer wheel of the bearing are corroded electrically, the bearing is damaged finally, and the use performance of the motor is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a plastic envelope brushless DC motor prevents electric corrosion device can stably eliminate the axle voltage at pivot both ends, effectively reduces or even eliminates electric corrosion to reduce the bearing noise and improve the bearing life-span.

The utility model discloses a realize above-mentioned purpose and specifically adopt following technical scheme:

the utility model provides a plastic envelope brushless DC motor's prevents electric corrosion device, includes front end housing and rear end cap, still includes the electrically conductive sticky tape, the electrically conductive sticky tape extends to the rear end cap from the front end housing, all be provided with the damping ring on front end housing and the rear end cap, the electrically conductive sticky tape is compressed tightly between damping ring and front end housing rear end cap.

Furthermore, the front end cover and the rear end cover are both provided with a boss, the conductive adhesive tape comprises at least 2 first tape bodies connected with the front end cover and the rear end cover, and the outer side of the boss is annularly provided with a second tape body for sealing the end part of the first tape body.

Furthermore, all there are a plurality of connecting holes along same circumference equipartition on front end housing, the rear end cap, be provided with the piston in the connecting hole and with piston fixed connection's piston rod, the piston rod is hollow pole, and the piston rod is connected one end opening setting with the sucking disc, and the other end is provided with the air vent, connecting hole port department be provided with be connected pore wall sealing connection's closing cap, the piston rod pass the closing cap and with closing cap sealing connection, and the piston rod can be in connecting hole reciprocating motion, the tailpiece of the piston rod portion is provided with the sucking disc that a damping ring is connected, the damping ring bottom is provided with the adsorbed indent mounting groove of confession sucking disc.

Furthermore, the bottom of the connecting hole is provided with an annular groove communicated with all the connecting holes, the side wall of the annular groove is provided with a gas transmission pipeline, the gas transmission pipeline extends to the end face of the front end cover/the rear end cover and is positioned outside the damping ring, and the end part of the gas transmission pipeline is provided with a sealing plug connected with the gas transmission pipeline in a sealing manner.

Furthermore, the annular groove wall is sunken to the inner side of the front end cover/the rear end cover, and corners of the annular groove wall are set to be round corners.

The utility model has the advantages as follows:

the utility model provides a plastic envelope brushless DC motor prevents electric corrosion device can reduce the axle voltage of eliminating the motor even, prevents that the axle current from producing to play better guard action to the bearing, reduce the bearing noise, the life of extension bearing, particularly, electrically conductive sticky tape intercommunication front end housing and rear end cap form the equipotential, reduce the axle voltage by a wide margin, thereby effectively reduce the risk of bearing electrocorrosion.

Drawings

FIG. 1 is a schematic front view of the structure;

FIG. 2 is a schematic side view;

FIG. 3 is a schematic view of the connection structure of the upper end cover and the damping ring;

FIG. 4 is an enlarged view of circle A in FIG. 3;

FIG. 5 is an enlarged view of circle B in FIG. 3;

FIG. 6 is a schematic view of the upper end cap;

reference numerals: 1-upper end cover, 2-damping ring, 3-conductive adhesive tape, 4-lower end cover, 5-connecting hole, 6-piston, 7-sealing cover, 8-piston rod, 9-sucking disc, 10-mounting groove, 11-vent hole, 12-gas pipeline, 13-annular groove, 14-boss, and 15-sealing plug.

Detailed Description

In the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed" and "in communication" are to be construed broadly, e.g., as meaning in fixed communication, in removable communication, or in integral communication; either mechanically or electrically; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

Referring to fig. 1-3, the embodiment provides an electric corrosion prevention device for a plastic package brushless dc motor, which includes a front end cover 1 and a rear end cover 4, and further includes a conductive adhesive tape 3, where the conductive adhesive tape 3 extends from the front end cover 1 to the rear end cover 4, the front end cover 1 and the rear end cover 4 are both provided with a damping ring 2, and the conductive adhesive tape 3 is compressed between the damping ring 2 and the front end cover 1/the rear end cover 4, that is, two ends of the conductive adhesive tape 3 are respectively pressed by one damping ring 2, so that occurrence of a situation that the conductive adhesive is shaken off due to a decrease in adhesive bonding capability during a motor use process can be greatly reduced, and thus stability of the conductive adhesive is effectively improved, so that an electric corrosion phenomenon can be effectively reduced or even eliminated, bearing noise is reduced, and a service life of a bearing is prolonged.

As a preferred embodiment, the front end cap 1 and the rear end cap 4 are both provided with a boss 14, the conductive adhesive tape 3 includes at least 2 first tapes connecting the front end cap 1 and the rear end cap 4, a second tape enclosing an end of the first tape is annularly arranged outside the boss 14, the second tape is adhered to the first tape, and then the second tape is completely pressed by the damping ring 2 to further enhance the stability of the conductive adhesive tape 3, but when installing, there is a great difficulty, the second tape is easy to curl and fall off when the damping ring 2 is sleeved outside the boss 14, for this, a more optimized fixing manner is provided, specifically, as shown in fig. 3-6, a plurality of connecting holes 5 are uniformly distributed along the same circumference on the front end cap 1 and the rear end cap 4, pistons 6 and piston rods 8 fixedly connected with the pistons 6 are arranged in the connecting holes 5, the end part of the connecting hole 5 is provided with a sealing cover 7 which is connected with the wall of the connecting hole 5 in a sealing way, the piston rod 8 passes through the sealing cover 7 and is connected with the sealing cover 7 in a sealing way, the piston rod 8 can move in the connecting hole 5 in a reciprocating way, the end part of the piston rod 8 is provided with a sucking disc 9 which is connected with a damping ring 2, the piston rod 8 is a hollow rod, a gas channel is formed in the hollow rod, the end part of the gas channel is communicated with the sucking disc 9, one end which is connected with the piston 6 is provided with a vent hole 11 which is communicated with gas, the bottom of the damping ring 2 is provided with an inwards concave mounting groove 10 which is used for the sucking of the sucking disc 9, when the device is installed, the conductive adhesive tape 3 is pasted, then the damping ring 2 is pressed to be sleeved outside the boss 14, the bottom of the damping ring 2 is completely abutted against the end cover, at the moment, the sucking disc 9 is positioned in the mounting groove 10, the damping ring 2 is pressed to push the piston rod 8 and the piston 6 to move towards the bottom of the annular groove 13, the gas at the bottom of the sucking disc 9 and the mounting groove 10 enters between the sealing cover 7 and the piston 6, make it interior negative pressure that forms, thereby it effectively promotes the stability that damping ring 2 and front end housing 1 rear end cap 4 are connected to lead to damping ring 2 tightly being adsorbed on sucking disc 9, also can compress tightly conductive adhesive tape 3 better simultaneously, prevents that conductive adhesive tape 3 from droing, can also set up the annular compressing band of round evagination simultaneously in damping ring 2 bottoms, further compresses tightly conductive adhesive tape 3 by it, promotes the fixed stability of conductive adhesive tape 3.

In order to facilitate the disassembly of the damping ring, the bottom of the connecting hole 5 is provided with an annular groove 13 communicated with all the connecting holes 5, the side wall of the annular groove 13 is provided with a gas transmission pipeline 12, the gas transmission pipeline 12 extends to the end surface of the front end cover 1/the rear end cover 4 and is positioned outside the damping ring 2, the end part of the gas transmission pipeline 12 is provided with a plugging plug 15 hermetically connected with the gas transmission pipeline 12, when the damping ring 2 is assembled, the plugging plug 15 is in an open state, the piston 6 is pressed downwards, the gas in the annular groove 13 is discharged through the gas transmission pipeline 12, after the damping ring 2 is assembled, the gas transmission pipeline 12 is sealed by the plugging plug 15, the damping ring can be prevented from falling off, the stability of the damping ring in fixation is improved, the stability of the damping ring in fixation on the conductive adhesive tape 3 is improved, when the damping ring needs to be disassembled, the plugging plug 15 can be opened, the use is very convenient, and the processing is convenient, can be directly on front end housing 1/rear end cap 4 integrated into one piece an annular groove, then be provided with the annular plate at its internal seal, set up a plurality of connecting holes 5 on this annular plate, then form annular groove 13 between annular plate and the annular groove, thereby make processing very convenient, of course in order to reduce the manufacturing cost of front end housing 1/rear end cap 4, can make annular groove 13 wall recess to front end housing 1/rear end cap 4 inboard, keep away from damping ring one side promptly, and in order to prevent that it from hindering internal component, can make annular groove 13 wall corner all set up to the fillet.

The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto, the protection scope of the present invention is defined by the claims, and all structural changes equivalent to the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. The utility model provides a plastic envelope brushless DC motor's electricity corrosion prevention device, includes front end housing (1) and rear end housing (4), its characterized in that still includes electrically conductive sticky tape (3), electrically conductive sticky tape (3) extend to rear end housing (4) from front end housing (1), all be provided with damping ring (2) on front end housing (1) and rear end housing (4), electrically conductive sticky tape (3) are compressed tightly between damping ring (2) and front end housing (1)/rear end housing (4).

2. The device for preventing electrical corrosion of a plastic package brushless DC motor according to claim 1, wherein the front end cap (1) and the rear end cap (4) are both provided with a boss (14), the conductive tape (3) comprises at least 2 first tapes connecting the front end cap (1) and the rear end cap (4), and a second tape sealing an end of the first tape is annularly arranged outside the boss (14).

3. The electric corrosion prevention device of the plastic package brushless DC motor according to claim 1, characterized in that a plurality of connection holes (5) are uniformly distributed along the same circumference on the front end cover (1) and the rear end cover (4), a piston (6) and a piston rod (8) fixedly connected with the piston (6) are arranged in each connection hole (5), the piston rod (8) is a hollow rod, the piston rod (8) is connected with a sucker (9) and provided with an opening at one end, a vent hole (11) is arranged at the other end, a sealing cover (7) hermetically connected with the wall of the connection hole (5) is arranged at the port of the connection hole (5), the piston rod (8) penetrates through the sealing cover (7) and is hermetically connected with the sealing cover (7), the piston rod (8) can reciprocate in the connection hole (5), the end of the piston rod (8) is provided with the sucker (9) connected with a damping ring (2), the bottom of the damping ring (2) is provided with an inwards concave mounting groove (10) for the suction disc (9) to adsorb.

4. The device for preventing electrical corrosion of the plastic package brushless direct current motor as claimed in claim 3, wherein the bottom of the connecting hole (5) is provided with an annular groove (13) communicating with all the connecting holes (5), the side wall of the annular groove (13) is provided with an air transmission pipeline (12), the air transmission pipeline (12) extends to the end surface of the front end cover (1)/the rear end cover (4) and is located outside the damping ring (2), and the end part of the air transmission pipeline (12) is provided with a sealing plug (15) which is connected with the air transmission pipeline (12) in a sealing manner.

5. The device for preventing electrical corrosion of a plastic package brushless direct current motor as claimed in claim 4, wherein the wall of the annular groove (13) is recessed to the inner side of the front end cover (1)/the rear end cover (4), and the corner of the wall of the annular groove (13) is set to be a round corner.

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