CN217152992U

CN217152992U - Multi-layer labyrinth groove type sealing structure of electric spindle

Info

Publication number: CN217152992U
Application number: CN202220395063.1U
Authority: CN
Inventors: 陆力伟; 胡静芳; 顾培坤
Original assignee: Wuxi Siming Machinery Manufacturing Co ltd
Current assignee: Wuxi Siming Machinery Manufacturing Co ltd
Priority date: 2022-02-26
Filing date: 2022-02-26
Publication date: 2022-08-09
Anticipated expiration: 2032-02-26

Abstract

The utility model discloses an electricity main shaft multilayer labyrinth slot type seal structure, including sleeve, gland and main shaft, lock nut is established to main shaft surface cover, and lock nut surface cover establishes the fender lid, and lock nut surface cover establishes the gland, and gasket mechanism is established to main shaft surface cover, and gasket mechanism surface cover establishes the sleeve, and the symmetry sets up the cavity in the gland, and cavity one side intercommunication sliding tray sets up the movable plate in, and the movable plate leans on outer one end installation spring two, and two fixed connection cavity inner walls of spring, and the movable plate leans on interior one end installation inserted block, and the inserted block passes the cavity. The utility model discloses in injecting lock nut into the gland, lock nut promotes slide damper through the push pedal and descends, makes the inserted block lose the holding power, in promoting the inserted block through two springs and injecting the slot to firmly fix lock nut's position, it is fixed effectual.

Description

Multi-layer labyrinth groove type sealing structure of electric spindle

Technical Field

The utility model relates to an electricity main shaft technical field, concretely relates to electricity main shaft multilayer labyrinth slot type seal structure.

Background

The electric spindle is a new technology which integrates a machine tool spindle and a spindle motor into a whole and appears in the field of numerical control machines. The spindle is a set of components, which includes the electric spindle itself and its accessories: the device comprises an electric main shaft, a high-frequency conversion device, an oil mist lubricator, a cooling device, a built-in encoder, a tool changing device and the like. The transmission structure form of the spindle motor and the machine tool spindle which are combined into a whole enables the spindle part to be relatively independent from a transmission system and an integral structure of the machine tool, so that the spindle unit can be made into a spindle unit, commonly called as an electric spindle, and has the characteristics of high rotating speed, high precision, low noise and more suitability for spray lubrication of a structure with a locking notch on an inner ring.

Chinese patent discloses an electricity main shaft multilayer labyrinth slot type seal structure (grant No. CN210623570U), and this patent technique can have the characteristics that dustproof performance is good, bearing long service life, stability is good, but, lock nut and main shaft connection effect are not good, after long-time work, appear becoming flexible easily.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough that exists among the prior art, the utility model provides an electricity main shaft multilayer labyrinth slot type seal structure, inject lock nut in the gland, lock nut promotes slide damper through the push pedal and descends, make the inserted block lose the holding power, it injects in the slot to promote the inserted block through two springs, thereby firmly fix lock nut's position, fixed effectual, the power that a spring shrink resets drives gasket and middle removal down, go up gasket and lower gasket extrusion annular seal pad, make annular seal pad warp, increase sealed effect.

According to the technical scheme provided by the utility model, the multi-layer labyrinth groove type sealing structure of the electric spindle comprises a sleeve, a gland and a spindle, wherein a locking nut is sleeved on the outer surface of the spindle, a baffle cover is sleeved on the outer surface of the locking nut, the gland is sleeved on the outer surface of the locking nut, and a gasket mechanism is sleeved on the outer surface of the spindle;

the outer surface of the gasket mechanism is sleeved with a sleeve, cavities are symmetrically arranged in the gland, one side of each cavity is communicated with a sliding groove, a moving plate is arranged in each cavity, a second spring is arranged at one end, close to the outer side, of the moving plate, the second spring is fixedly connected with the inner wall of each cavity, an inserting block is arranged at one end, close to the inner side, of the moving plate, and the inserting block penetrates through the cavities;

the side face of the locking nut is provided with a slot corresponding to the position of the insert block, a sliding baffle is arranged in the cavity, one end of the sliding baffle penetrates through the cavity and is positioned in the sliding groove, a push plate is arranged at one end of the sliding baffle close to the inner side, and the push plate is positioned in the sliding groove.

Preferably, the gasket mechanism comprises an upper gasket and a lower gasket, an annular sealing gasket is arranged between the upper gasket and the lower gasket, a plurality of through holes are formed in the annular sealing gasket, and a first spring is arranged in the through hole.

Preferably, two ends of the first spring are respectively and fixedly connected with the upper gasket and the lower gasket, and the first spring is in a stretching state.

Preferably, the second spring is in a compressed state.

The utility model discloses a technological effect and advantage:

the utility model discloses in injecting lock nut into the gland, lock nut promotes slide damper through the push pedal and descends, makes the inserted block lose the holding power, in promoting the inserted block through two springs and injects the slot to firmly fix lock nut's position, fixed effectual, the power that a spring shrink resets drives gasket and lower gasket and removes to the centre, goes up gasket and lower gasket extrusion annular and fills up the pad, makes the annular seal pad warp, increases sealed effect.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural view of the main shaft of the present invention;

FIG. 3 is a schematic structural diagram of a gasket mechanism according to the present invention;

FIG. 4 is a schematic structural view of the cavity of the present invention;

in the figure: 1. a sleeve; 2. a gland; 21. a cavity; 22. a sliding groove; 23. moving the plate; 24. inserting a block; 25. a second spring; 26. a sliding baffle; 27. pushing a plate; 3. a main shaft; 5. a blocking cover; 6. locking the nut; 7. a gasket mechanism; 71. an upper gasket; 72. a lower gasket; 73. an annular seal; 74. a through hole; 75. and a first spring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Referring to fig. 1 to 4, in the present embodiment, a multi-layer labyrinth groove type sealing structure for an electric spindle is provided, which includes a sleeve 1, a gland 2 and a spindle 3, wherein a lock nut 6 is sleeved on an outer surface of the spindle 3, a retaining cover 5 is sleeved on an outer surface of the lock nut 6, the gland 2 is sleeved on an outer surface of the lock nut 6, a gasket mechanism 7 is sleeved on an outer surface of the spindle 3, the sleeve 1 is sleeved on an outer surface of the gasket mechanism 7, the gasket mechanism 7 includes an upper gasket 71 and a lower gasket 72, an annular gasket 73 is disposed between the upper gasket 71 and the lower gasket 72, a plurality of through holes 74 are formed in the annular gasket 73, a first spring 75 is disposed in the through hole 74, two ends of the first spring 75 are respectively and fixedly connected to the upper gasket 71 and the lower gasket 72, the first spring 75 is in a stretched state, a cavity 21 is symmetrically disposed in the gland 2, one side of the cavity 21 is communicated with a sliding groove 22, a moving plate 23 is disposed in the cavity 21, a second spring 25 is mounted at an outer end of the moving plate 23, and the second spring 25 is fixedly connected with the inner wall of the cavity 21, the second spring 25 is in a compressed state, the insertion block 24 is installed at one end, close to the inner, of the moving plate 23, the insertion block 24 penetrates through the cavity 21, the slot is formed in the side face of the locking nut 6, corresponding to the insertion block 24, the sliding baffle 26 is arranged in the cavity 21, one end of the sliding baffle 26 penetrates through the cavity 21 and is located in the sliding groove 22, the push plate 27 is installed at one end, close to the inner, of the sliding baffle 26, and the push plate 27 is located in the sliding groove 22.

The utility model discloses a theory of operation is: firstly, the gland 2 is installed, then the locking nut 6 is inserted into the gland 2, the locking nut 6 pushes the sliding baffle 26 to descend through the push plate 27, the inserting block 24 loses the supporting force, the inserting block 24 is pushed to be inserted into the inserting groove through the second spring 25, the position of the locking nut 6 is firmly fixed, the first spring 75 contracts and resets to drive the upper gasket 71 and the lower gasket 72 to move towards the middle, the upper gasket 71 and the lower gasket 72 extrude the annular sealing gasket 73, the annular sealing gasket 73 deforms, and the sealing effect is improved.

It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present disclosure, all other embodiments obtained by a person of ordinary skill in the art and related fields without creative efforts shall fall within the protection scope of the present disclosure. The structures, devices, and methods of operation of the present invention, not specifically described and illustrated, are generally practiced by those of ordinary skill in the art without specific recitation or limitation.

Claims

1. A multi-layer labyrinth groove type sealing structure of an electric spindle comprises a sleeve (1), a gland (2) and a spindle (3), and is characterized in that a locking nut (6) is sleeved on the outer surface of the spindle (3), a blocking cover (5) is sleeved on the outer surface of the locking nut (6), the gland (2) is sleeved on the outer surface of the locking nut (6), and a gasket mechanism (7) is sleeved on the outer surface of the spindle (3);

the sleeve (1) is sleeved on the outer surface of the gasket mechanism (7), the cavities (21) are symmetrically arranged in the gland (2), one side of each cavity (21) is communicated with the sliding groove (22), the movable plate (23) is arranged in each cavity (21), the second spring (25) is installed at one end, close to the outer end, of the movable plate (23), the second spring (25) is fixedly connected with the inner wall of each cavity (21), the insertion block (24) is installed at one end, close to the inner end, of the movable plate (23), and the insertion block (24) penetrates through the cavities (21);

the slot is opened in the position that lock nut (6) side corresponds inserted block (24), sets up slide damper (26) in cavity (21), and slide damper (26) one end is passed cavity (21) and is located sliding tray (22), and slide damper (26) lean on interior one end installation push pedal (27), and push pedal (27) are located sliding tray (22).

2. The multi-layer labyrinth groove type sealing structure of the electric spindle according to claim 1, wherein the gasket mechanism (7) comprises an upper gasket (71) and a lower gasket (72), an annular sealing gasket (73) is arranged between the upper gasket (71) and the lower gasket (72), a plurality of through holes (74) are formed in the annular sealing gasket (73), and a first spring (75) is arranged in the through hole (74).

3. The multi-layer labyrinth groove type sealing structure of the electric spindle according to claim 2, wherein the two ends of the first spring (75) are respectively fixedly connected with the upper gasket (71) and the lower gasket (72), and the first spring (75) is in a stretching state.

4. The multi-layer labyrinth groove type sealing structure for the electric spindle according to claim 1, wherein the second spring (25) is in a compressed state.