CN215344182U - Output shaft sealing pressing piece for permanent magnet motor - Google Patents

Abstract

The utility model relates to the technical field of motor output shaft sealing devices, in particular to an output shaft sealing pressing piece for a permanent magnet motor, which comprises a motor main body and an output shaft, wherein the output shaft is arranged in the motor main body, a front end cover is welded at the front end of the motor main body, an annular groove is formed in the side surface of the front end cover, and an extrusion pad is arranged in the annular groove. The arranged extrusion ring and the extrusion pad are matched with the annular groove through the extrusion ring, so that the extrusion pad is deformed, and the front end cover and the sealing gland are sealed; by utilizing the arranged water passing groove, when water stain or moisture seeps into the cover body through the gap between the front end cover and the sealing gland, the water stain can flow downwards along the water passing groove and finally flows out of the water outlet, and dust, sundries and the like are prevented from entering the cover body through the sponge arranged at the water outlet; the output shaft is sealed by the arranged inner cover and the arranged sealing washer, and the permanent magnet motor has good sealing performance through multi-layer sealing arrangement.

Description

Output shaft sealing pressing piece for permanent magnet motor

Technical Field

The utility model relates to the technical field of motor output shaft sealing devices, in particular to an output shaft sealing pressing piece for a permanent magnet motor.

Background

The permanent magnet motor adopts a permanent magnet to generate a magnetic field of the motor, does not need an excitation coil or an excitation current, and can be widely applied along with the appearance of high-performance permanent magnet materials and the rapid development of control technology. The permanent magnet motor has the advantages of high efficiency, high power density, large power factor, large starting torque, wide speed regulation range and the like, gradually replaces an induction motor and a switched reluctance motor, and is increasingly widely applied in various fields of industrial production and daily life.

The existing motor shell has poor sealing performance, and external sundries, water stains and the like can easily enter the motor, so that the normal use of the motor is influenced. The motor is easy to be wetted by water entering the motor in a humid environment or outdoor work, so that the motor is burnt out due to short circuit; and the output shaft end of the permanent magnet motor is the position where the water is most easily fed into the whole motor, so that the waterproof treatment of the output shaft end of the direct current motor is particularly important.

Therefore, there is a need for an output shaft packing follower for a permanent magnet machine that addresses the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to an output shaft packing follower for a permanent magnet machine that solves the problems set forth in the background above.

In order to achieve the purpose, the utility model provides the following technical scheme: an output shaft sealing and pressing piece for a permanent magnet motor comprises a motor main body and an output shaft, wherein the output shaft is arranged in the motor main body, the front end of the motor main body is welded with a front end cover, the side surface of the front end cover is provided with an annular groove, an extrusion pad is arranged in the annular groove, an inner cover, a sealing washer, a butt joint ring, a sealing spring, an annular plate and a sealing gland are sequentially sleeved on the output shaft from right to left, the inner cover is inserted with the front end cover, the side surface of the inner cover is inserted with one side of the sealing washer, the other side of the sealing washer is inserted with the butt-joint ring, the sealing spring is arranged between the butt-joint ring and the annular plate, the annular plate is inserted with the sealing gland, the side welding of gland has the extrusion ring, the extrusion ring is pegged graft with annular groove, the side of gland has seted up the water trough, the delivery port has been seted up to the lower extreme of water trough.

Preferably, the sealing washer is a rubber gasket, and the cross section of the sealing washer is arranged in an I shape.

Preferably, one end of the sealing spring is inserted into the butt joint ring, and the other end of the sealing spring is inserted into the annular plate.

Preferably, the extrusion ring is in contact with the extrusion pad, a circular groove is formed in the side face of the extrusion pad, and the extrusion ring circular groove is spliced.

Preferably, the cylindrical surface of the front end cover is welded with four large convex blocks in a circumferential array manner, the cylindrical surface of the sealing gland is welded with four small convex blocks in a circumferential array manner, and the front end cover is connected with the sealing gland through bolts.

Preferably, the water outlet is obliquely and obliquely arranged downwards from left to right, and sponge is stuck in the water outlet.

Compared with the prior art, the utility model has the beneficial effects that: the arranged extrusion ring and the extrusion pad are matched with the annular groove through the extrusion ring, so that the extrusion pad is deformed, and the front end cover and the sealing gland are sealed; by utilizing the arranged water passing groove, when water stain or moisture seeps into the cover body through the gap between the front end cover and the sealing gland, the water stain can flow downwards along the water passing groove and finally flows out of the water outlet, and dust, sundries and the like are prevented from entering the cover body through the sponge arranged at the water outlet; utilize inner cup and the seal ring that sets up, promote the annular plate through gland, make butt joint ring and inner cup cooperation form the extrusion to seal ring, make seal ring produce deformation and form sealedly to the output shaft, set up through the multilayer seal, make permanent-magnet machine have fine leakproofness.

Drawings

FIG. 1 is a schematic structural diagram of a sealing device of a permanent magnet motor according to the present invention;

fig. 2 is an exploded view of a permanent magnet motor sealing device according to the present invention;

fig. 3 is a schematic view of the gland structure of the present invention.

In the figure: 1. a motor main body; 2. an output shaft; 3. a front end cover; 31. an annular groove;

32. pressing the cushion; 4. an inner cover; 41. a sealing gasket; 42. a docking ring; 5. an annular plate;

51. a seal spring; 6. a sealing gland; 61. an extrusion ring; 7. a water trough; 71. a water outlet; 8. a sponge.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 3, the present invention provides a technical solution: the utility model provides an output shaft sealing die for permanent-magnet machine, includes motor body 1 and output shaft 2, and motor body 1 is inside to be provided with output shaft 2, and the front end welding of motor body 1 has front end housing 3, and annular groove 31 has been seted up to the side of front end housing 3, is provided with the dummy block 32 in the annular groove 31, and dummy block 32 is the packing ring of rubber material, and front end housing 3 can pass through bolted connection with 1 leaf of motor body.

The output shaft 2 is gone up from right side to left side and is equipped with inner cup 4 in proper order, seal ring 41, butt joint ring 42, sealing spring 51, annular plate 5 and sealing gland 6, inner cup 4 is pegged graft with front end housing 3, the side of inner cup 4 is pegged graft with one side of seal ring 41, the opposite side of seal ring 41 is pegged graft with butt joint ring 42, seal ring 41 is the pad of rubber material, seal ring 41's cross section becomes the I shape setting, form the extrusion to seal ring 41 through butt joint ring 42 and the cooperation of inner cup 4, it is sealed to make seal ring 41 produce deformation and form output shaft 2, the lateral surface and the front end housing 3 of seal ring 41 closely laminate.

The seal spring 51 is provided between the abutment ring 42 and the annular plate 5, one end of the seal spring 51 is inserted into the abutment ring 42, the other end of the seal spring 51 is inserted into the annular plate 5, and the seal spring 51 applies an elastic force to the abutment ring 42.

Annular plate 5 is pegged graft with gland 6, gland 6's side welding has extrusion ring 61, extrusion ring 61 is pegged graft with annular groove 31, extrusion ring 61 and extrusion pad 32 contact, the circular recess has been seted up to extrusion pad 32's side, extrusion ring 61 circular recess is pegged graft, the face of cylinder of front end housing 3 becomes circumference array welding and has four big convex blocks, gland 6's face of cylinder becomes circumference array welding and has four little convex blocks, pass through bolted connection between front end housing 3 and the gland 6, gland 6 drives extrusion ring 61 and removes, extrusion ring 61 and the cooperation of annular groove 31 produce the extrusion to extrusion pad 32, make extrusion pad 32 produce deformation, make and seal between front end housing 3 and the gland 6.

Water service tank 7 has been seted up to gland 6's side, water outlet 71 has been seted up to water service tank 7's lower extreme, and water outlet 71 from left to right slopes downward sloping setting, and it is provided with sponge 8 to paste in the water outlet 71, and when water stain or moisture infiltrated in the lid to the clearance department through front end housing 3 and gland 6, water stain can flow along water service tank 7 downwards, flows out from water outlet 71 at last, through the sponge 8 that sets up in the water outlet 71, can effectually prevent that dust, debris etc. from getting into in the lid.

The working principle is as follows: during installation, the extrusion pad 32 is placed in the annular groove 31, the inner cover 4, the sealing washer 41, the butt ring 42, the sealing spring 51, the annular plate 5 and the sealing gland 6 are sequentially sleeved on the output shaft 2, the sealing gland 6 is fixed on the front end cover 3 through bolts, and meanwhile, the extrusion ring 61 and the annular groove 31 are matched to extrude the extrusion pad 32, so that the extrusion pad 32 is deformed, and the front end cover 3 and the sealing gland 6 are sealed; through the arranged water through groove 7, when water stain or moisture seeps into the cover body through the gap between the front end cover 3 and the sealing gland 6, the water stain flows downwards along the water through groove 7 and finally flows out of the water outlet 71, and through the sponge 8 arranged in the water outlet 71, dust, sundries and the like can be effectively prevented from entering the cover body; the in-process that gland 6 and front end housing 3 are fixed, gland 6 promote the motion of annular plate 5, and annular plate 5 extrusion sealing spring 51, sealing spring 51 promote butt ring 42, forms the extrusion to seal ring 41 through butt ring 42 and the cooperation of inner cup 4, makes seal ring 41 produce deformation and forms sealedly to output shaft 2, sets up through the multilayer seal, makes permanent-magnet machine have fine leakproofness.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. An output shaft packing follower for a permanent magnet motor, comprising a motor body (1) and an output shaft (2), characterized in that: the motor comprises a motor body (1), an output shaft (2) is arranged inside the motor body (1), a front end cover (3) is welded at the front end of the motor body (1), an annular groove (31) is formed in the side face of the front end cover (3), an extrusion pad (32) is arranged in the annular groove (31), the output shaft (2) is sequentially sleeved with an inner cover (4), a sealing washer (41), a butt joint ring (42), a sealing spring (51), an annular plate (5) and a sealing gland (6) from right to left, the inner cover (4) is spliced with the front end cover (3), the side face of the inner cover (4) is spliced with one side of the sealing washer (41), the other side of the sealing washer (41) is spliced with the butt joint ring (42), the sealing spring (51) is arranged between the butt joint ring (42) and the annular plate (5), the annular plate (5) is spliced with the sealing gland (6), the side welding of gland (6) has extrusion ring (61), extrusion ring (61) and annular groove (31) are pegged graft, water trough (7) have been seted up to the side of gland (6), delivery port (71) have been seted up to the lower extreme of water trough (7).

2. An output shaft packing follower for a permanent magnet machine according to claim 1, wherein: the sealing washer (41) is made of rubber, and the cross section of the sealing washer (41) is arranged in an I shape.

3. An output shaft packing follower for a permanent magnet machine according to claim 1, wherein: one end of the sealing spring (51) is plugged with the butt joint ring (42), and the other end of the sealing spring (51) is plugged with the annular plate (5).

4. An output shaft packing follower for a permanent magnet machine according to claim 1, wherein: the extrusion ring (61) is in contact with the extrusion pad (32), a circular groove is formed in the side face of the extrusion pad (32), and the extrusion ring (61) is inserted into the circular groove.

5. An output shaft packing follower for a permanent magnet machine according to claim 1, wherein: the cylindrical surface of the front end cover (3) is welded with four large convex blocks in a circumferential array mode, the cylindrical surface of the sealing gland (6) is welded with four small convex blocks in a circumferential array mode, and the front end cover (3) is connected with the sealing gland (6) through bolts.

6. An output shaft packing follower for a permanent magnet machine according to claim 1, wherein: the water outlet (71) is obliquely and obliquely downwards arranged from left to right, and a sponge (8) is stuck in the water outlet (71).

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