Nut locking structure

Abstract

The utility model relates to a nut anti-loosing structure, which is applied to a screw air compressor, the nut anti-loosing structure comprises a rotor shaft, a bearing seat, a bearing, an anti-loosing sheet, a key groove and a nut, the rotor shaft is rotatably connected to a main body of the screw air compressor, the extending end of the rotor shaft extends out of the exhaust end of the main body, and the bearing, the anti-loosing sheet and the nut are sequentially arranged outwards at the extending end. A bearing seat is arranged between the bearing and the body, a key groove is formed in the extending end in the axial direction and penetrates through the extending end in the axial direction, the anti-loosening piece comprises an anti-loosening body and a buckle, the buckle is arranged on the side, close to the nut, of the anti-loosening body, one side of the anti-loosening body abuts against the end face of an inner ring of the bearing, and the other side of the anti-loosening body abuts against the end face of one side of the nut. One end of the buckle is embedded in the key groove so that the nut can be locked on the peripheries of the buckle and the extending end, the other end of the buckle extends out of the end face of the other side of the nut along the key groove, and the other end of the buckle abuts against the end face of the other side of the nut. The anti-loosening piece and the key groove can prevent the nut from loosening, and mounting and dismounting are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressors, in particular to a nut anti-loosening structure. Background Art

[0002] The male and female rotors at the exhaust end of the screw air compressor are generally fixed and driven by bearings. In order to fix the bearing axially, the bearing end is generally locked and fixed. The more common structure is a nut locking and fixing structure. The male and female rotors are passed through the outer end shaft of the main body of the screw air compressor, and bearings and nuts are set outward in sequence, and locked with nuts. However, there is a problem with the nut locking and fixing structure: during the long-term operation of the main machine, the nut is only fixed axially by the thread locking force. Due to temperature changes, pressure and vibration, there is a risk of the nut loosening, causing the bearing to loosen, and then the main machine fails. Utility Model Content

[0003] The utility model aims to provide a nut anti-loosening structure to solve the defect that the nut locking and fixing structure of the exhaust end bearing of the screw air compressor in the prior art is easy to loosen.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] The utility model provides a nut anti-loosening structure, which is applied to a screw air compressor. The nut anti-loosening structure comprises a rotor shaft, a bearing seat, a bearing, an anti-loosening sheet, a keyway and a nut. The rotor shaft is rotatably connected to the main body of the screw air compressor. The protruding end of the rotor shaft protrudes from the exhaust end of the main body. The protruding end is sequentially provided with the bearing, the anti-loosening sheet and the nut outwardly. The bearing seat is arranged between the bearing and the main body. The keyway is axially arranged on the protruding end. The keyway penetrates the protruding end along the axial direction. The anti-loosening sheet comprises an anti-loosening body and a buckle. The buckle is arranged on a side of the anti-loosening body close to the nut. One side of the anti-loosening body abuts against the inner ring end face of the bearing, and the other side of the anti-loosening body abuts against one side end face of the nut. One end of the buckle is embedded in the keyway so that the nut is locked to the outer periphery of the buckle and the protruding end. The other end of the buckle protrudes from the other side end face of the nut along the keyway, and the other end of the buckle abuts against the other side end face of the nut.

[0006] Preferably, the anti-loosening body is a circular ring piece, the buckle is arranged on the inner ring of the circular ring piece, and the buckle extends inwardly and axially of the circular ring piece.

[0007] Preferably, the buckle is a metal part.

[0008] Preferably, the buckle is an elastic member.

[0009] Preferably, the buckle is square.

[0010] Preferably, the keyway is half-waisted.

[0011] Preferably, anti-slip grooves are provided on the matching surfaces of the buckle and the key slot.

[0012] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.

[0013] The positive progressive effect of the utility model is that the nut anti-loosening structure of the utility model is provided with a keyway on the protruding end of the rotor shaft, and an anti-loosening plate is added between the bearing and the nut, one end of the buckle of the anti-loosening plate is embedded in the keyway of the protruding end of the rotor shaft, and the other end of the buckle is abutted against the end of the nut to fix it at the end of the nut, thereby preventing the nut from loosening. While achieving the anti-loosening effect, it is also convenient for installation and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a partial structural schematic diagram of the nut anti-loosening structure of the utility model.

[0015] Figure 2 The figure is a schematic diagram of the assembly structure of the nut anti-loosening structure of the utility model.

[0016] Figure 3 It is a partial structural cutaway schematic diagram of the nut anti-loosening structure of the utility model.

[0017] Figure 4 For this utility model Figure 3 A magnified schematic diagram of the structure of part A.

[0018] Figure 5 It is a structural schematic diagram of the anti-loosening sheet of the utility model.

[0019] Description of reference numerals:

[0020] Body 1

[0021] Rotor shaft 2

[0022] Extension end 21

[0023] Keyway 22

[0024] Bearing seat 3

[0025] Bearing 4

[0026] Nut 5

[0027] Anti-loosening sheet 6

[0028] Anti-loosening body 61

[0029] Buckle 62 DETAILED DESCRIPTION

[0030] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0031] The utility model discloses a nut anti-loosening structure, which is applied to a screw air compressor, such as Figure 1-5 As shown, the nut anti-loosening structure includes a rotor shaft 2, a bearing seat 3, a bearing 4, an anti-loosening plate 6, a keyway 22 and a nut 5. The rotor shaft 2 is rotatably connected to the main body 1 of the screw air compressor. The protruding end 21 of the rotor shaft 2 protrudes from the exhaust end of the main body 1. The protruding end 21 is sequentially provided with a bearing 4, an anti-loosening plate 6 and a nut 5 outwardly. The bearing seat 3 is provided between the bearing 4 and the main body 1. A keyway 22 is axially provided on the protruding end 21. The keyway 22 penetrates the protruding end 21 along the axial direction. The anti-loosening plate 6 includes The anti-loosening body 61 and the buckle 62, the buckle 62 is arranged on the side of the anti-loosening body 61 close to the nut 5, one side of the anti-loosening body 61 abuts against the inner ring end face of the bearing 4, and the other side of the anti-loosening body 61 abuts against one side end face of the nut 5, one end of the buckle 62 is embedded in the keyway 22 to lock the nut 5 on the outer periphery of the buckle 62 and the protruding end 21, the other end of the buckle 62 protrudes from the other side end face of the nut 5 along the keyway 22, and the other end of the buckle 62 abuts against the other side end face of the nut 5.

[0032] Specifically, the structure of the screw air compressor is the prior art, and the part of the rotor shaft 2 in the main body 1 of the screw air compressor is a screw. In this embodiment, the protruding end 21 of the rotor shaft 2 protrudes from the exhaust end of the main body 1, and the protruding end 21 passes through the bearing 4, the anti-loosening plate 6 and the nut 5 in sequence. The bearing seat 3 is connected to the main body 1 and is arranged on the outer periphery of the protruding end 21, and the bearing 4 is arranged in the bearing seat 3. A keyway 22 is arranged on the protruding end 21 along the axial direction, and the keyway 22 penetrates the protruding end 21 outward along the axial direction. One end of the anti-loosening body 61 of the anti-loosening sheet 6 abuts against the inner ring end face of the bearing 4, and the other end of the anti-loosening body 61 abuts against the end face of the nut 5 close to the bearing 4; and the buckle 62 on the anti-loosening sheet 6 is embedded in the keyway 22 at one end close to the bearing 4, and the other end away from the bearing 4 extends out of the outer end of the nut 5 and can abut against the outer end face of the nut 5. This arrangement allows the nut 5 to simultaneously lock the anti-loosening sheet 6 and the outer periphery of the extended end 21, increasing the friction between the nut 5 and the extended end 21, and also fixing the nut 5 in the axial direction to prevent the nut 5 from loosening. While achieving the anti-loosening effect, it is also convenient for installation and disassembly. The buckle 62 and the keyway 22 are arranged in pairs, and can be set to one pair, two pairs or more pairs according to needs.

[0033] In this embodiment, the anti-loosening body 61 is a circular ring sheet, and the buckle 62 is arranged on the inner ring of the circular ring sheet. The buckle 62 extends inwardly and toward the axial direction of the circular ring sheet.

[0034] Specifically, the anti-loosening body 61 is a circular ring sheet, and a buckle 62 is arranged on the inner ring. The buckle 62 extends inward and is easily embedded in the key slot 22. During production, the buckle 62 can be cut into a shape in the circular sheet and then bent relative to the anti-loosening body 61, which is simple to produce and low in cost.

[0035] In this embodiment, the buckle 62 is a metal component.

[0036] Specifically, one end of the metal piece can be embedded in the keyway 22, and after the nut 5 is tightened, the other end of the metal piece is bent outward to abut against the outer end surface of the nut 5 to enhance the anti-loosening effect.

[0037] In an alternative embodiment, the buckle 62 is an elastic member.

[0038] Specifically, the buckle 62 is an elastic member. When the nut 5 is used for connection, one end of the buckle 62 is embedded downward. When it rebounds, it can enhance the tightness of the connection between the nut 5, the buckle 62 and the extended end 21 of the rotor shaft 2, and effectively prevent it from loosening. The outer end of the buckle 62 is first folded upward and then downward, and the thickness of the bent part is less than the depth of the keyway 22. After the nut 5 is tightened toward the bearing 4, the buckle 62 rebounds toward the direction of the nut 5, so that the side of the bent part close to the outer end face of the nut 5 can abut against the outer end face of the nut 5, and the nut 5 is not easy to loosen.

[0039] In this embodiment, the buckle 62 is square.

[0040] Specifically, the buckle 62 is square, which is easy to produce, and can also be set to a triangle or waist shape as needed.

[0041] In this embodiment, the keyway 22 is half-waisted.

[0042] Specifically, the keyway 22 is in a half-waist shape, which is easy to produce.

[0043] In this embodiment, the matching surfaces of the buckle 62 and the key slot 22 are both provided with anti-slip grooves.

[0044] Specifically, the mating surfaces of the buckle 62 and the keyway 22 are provided with a plurality of anti-skid grooves, each of which extends in the circumferential direction of the protruding end 21, and the plurality of anti-skid grooves are arranged in the axial direction of the protruding end 21. Such a setting can further enhance the friction between the release sheet and the protruding end 21, and effectively prevent the nut 5 from loosening.

[0045] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A nut anti-loosening structure, applied to a screw air compressor, characterized in that: The nut anti-loosening structure includes a rotor shaft, a bearing seat, a bearing, an anti-loosening plate, a keyway and a nut, the rotor shaft is rotatably connected to the main body of the screw air compressor, the protruding end of the rotor shaft protrudes out of the exhaust end of the main body, the protruding end is sequentially provided with the bearing, the anti-loosening plate and the nut outwardly, the bearing seat is arranged between the bearing and the main body, the keyway is axially arranged on the protruding end, the keyway penetrates the protruding end along the axial direction, the anti-loosening plate includes an anti-loosening body and a buckle, the buckle is arranged on the anti-loosening body close to the nut side, one side of the anti-loosening body abuts against the inner ring end face of the bearing, the other side of the anti-loosening body abuts against one side end face of the nut, one end of the buckle is embedded in the keyway so that the nut is locked to the outer periphery of the buckle and the protruding end, the other end of the buckle protrudes out of the other side end face of the nut along the keyway, and the other end of the buckle abuts against the other side end face of the nut.

2. The nut anti-loosening structure according to claim 1, characterized in that: The anti-loosening body is a circular ring piece, the buckle is arranged on the inner ring of the circular ring piece, and the buckle extends inwardly and axially of the circular ring piece.

3. The nut anti-loosening structure according to claim 1, characterized in that: The buckle is a metal part.

4. The nut anti-loosening structure according to claim 1, characterized in that: The buckle is an elastic member.

5. The nut anti-loosening structure according to claim 1, characterized in that: The buckle is square.

6. The nut anti-loosening structure according to claim 1, characterized in that: The keyway is half waist shaped.

7. The nut anti-loosening structure according to claim 1, characterized in that: The matching surfaces of the buckle and the key slot are both provided with anti-slip grooves.

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