Efficient commercial paper shredding motor shaft

Abstract

The utility model discloses an efficient commercial paper shredding motor shaft, which comprises a shaft body, a first end and a second end are respectively formed at two ends of the shaft body, and a plurality of clamp spring grooves for mounting elastic check rings are arranged on the shaft body at intervals; a flat section is arranged at the first end of the shaft body, and a flat position is arranged on the peripheral wall of the flat section; a plurality of guide grooves are formed in the peripheral wall of the iron core mounting section at intervals, and the guide grooves extend in the axial direction. Compared with the prior art, the commercial paper shredding motor shaft is not prone to axial displacement and circumferential displacement.

Description

TECHNICAL FIELD

[0001] The utility model relates to a paper shredder field, concretely relates to a kind of high-efficiency commercial paper shredder motor shaft. BACKGROUND

[0002] Paper shredder is used to shred the office appliance of paper, can be divided into many small strip paper to achieve the purpose of the paper file security of waste paper.Paper shredder basic working principle is by electric motor through transmission mechanism to drive paper shredder core rotation to shred paper, when shredding, electric motor motor speed is faster, long time trial, the existing motor shaft structure is prone to axial displacement, affect motor performance.

[0003] For example, the Chinese utility model patent with the application number 201621259989.9 (the authorized announcement number is CN206349873U) discloses a motor assembly in paper shredder, including motor, speed reducer and heat dissipation mechanism;The motor contains shell and motor shaft, the outer circumferential surface of the shell is provided with a plurality of uniformly distributed heat dissipation holes, the motor shaft is axially inserted in the shell, and both ends extend to the outside of the shell;The heat dissipation mechanism contains a heat dissipation cover and a heat dissipation fan, the heat dissipation cover is installed on the shell, a heat dissipation flow channel is arranged in the heat dissipation cover, the heat dissipation fan is installed in the heat dissipation flow channel, the heat dissipation cover is installed on the shell of the motor to make the heat dissipation holes and the heat dissipation flow channel communicate;The speed reducer contains input end and output end, the input end and the output end are respectively connected with motor shaft and heat dissipation fan transmission;The motor shaft increases the rotating speed of heat dissipation fan through speed reducer;The heat dissipation fan drives the heat in heat dissipation hole along heat dissipation flow channel after being discharged. The motor assembly in the paper shredder of the utility model does not need to additionally configure heat dissipation motor, and the structure is simpler, but the motor shaft of the utility model is smooth surface shaft, the engagement force between motor rotating shaft and shell is insufficient, the connection is not firm enough, in use, axial displacement and circumferential displacement are prone to occur, thereby affecting the performance of motor. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem to provide a kind of high-efficiency commercial paper shredder motor shaft for the above technical status, which is not prone to axial displacement and circumferential displacement of motor.

[0005] The utility model solves the technical problem to provide a kind of high-efficiency commercial paper shredder motor shaft for the above technical status, which is not prone to axial displacement and circumferential displacement of motor.

[0006] In order to facilitate the assembly of the core and the shaft body, and reduce the deformation generated in the process of pressing the rotor core, preferably, the guide groove is provided with a tapered section at both ends.

[0007] In order to be used for installing bearings, preferably, the shaft body is further provided with a first mounting section and a second mounting section which are arranged at intervals and are used for installing bearings, and the first mounting section and the second mounting section are respectively arranged at both ends of the core mounting section.

[0008] In order to reduce the axial displacement, improve the stability and service life of the motor, preferably, the plurality of snap spring grooves are respectively: a first snap spring groove arranged at the first end of the shaft body;

[0009] a second snap spring groove arranged at the connection between the first mounting section and the core mounting section; and

[0010] a third snap spring groove arranged at the connection between the second mounting section and the core mounting section.

[0011] In order to facilitate the installation of the rotor core, preferably, the cross-sectional diameters of the first mounting section and the second mounting section are smaller than the cross-sectional diameter of the core mounting section.

[0012] Preferably, the outer diameters of the first mounting section and the second mounting section are 12±0.005mm

[0013] Preferably, the outer diameter of the core mounting section is 12.1±0.04mm.

[0014] Preferably, the second end of the shaft body is provided with a gear section, and the cross section of the gear section is gear-shaped.

[0015] Preferably, the outer peripheral wall of the gear section is provided with a hardening layer, and the thickness of the hardening layer is 0.5-1.5mm. The wear resistance and strength of the tooth surface are improved, and the service life of the motor is improved.

[0016] Compared with the prior art, the advantages of the utility model lie in that: the shaft body is provided with a plurality of snap spring grooves which are arranged at intervals and are used for installing elastic retaining rings; the setting of the elastic retaining ring prevents the axial displacement of the motor during operation, so that the motor runs stably; in addition, the first end of the shaft body is provided with a flat section, the outer peripheral wall of the flat section is provided with a flat position, the flat position is matched with the inner single flat of the transition gear, the transition gear is driven to rotate and output torque, and the axial and circumferential positioning of the motor and the transition gear is realized, so that the axial displacement and circumferential displacement of the transition gear are prevented; the axial extension guide groove of the core mounting section makes the assembly of the shaft body and the core close. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of an embodiment;

[0018] Figure 2 It isFigure 1 A-A section view of the preferred embodiment of the present application. DETAILED DESCRIPTION

[0019] The present application will be further described in detail below with reference to the accompanying drawings.

[0020] As Figures 1-2 shown, the preferred embodiment of the present application. High efficiency commercial paper shredder motor shaft includes shaft body 100, shaft body 100 both ends are formed first end a and second end b, the shaft body 100 from first end a to second end b in turn includes first spring slot 51, flat position section 1, first installation section 3, second spring slot 52, iron core installation section 2, third spring slot 53, second installation section 4 and gear section 6.

[0021] Flat position section 1 is provided in the first end a, as Figure 2 shown, the outer wall of flat position section 1 is provided with flat position 11. Flat position 11 realizes the axial and circumferential positioning with the transition gear.

[0022] The outer wall of iron core installation section 2 is provided with a plurality of mutually spaced guide grooves 21, the guide grooves 21 extend along the axial direction. The both ends of guide grooves 21 are provided with taper section 22. Iron core installation section 2 is used for installing rotor iron core, the outer diameter of iron core installation section 2 is 12.1±0.04mm.

[0023] The shaft body 100 is also provided with first installation section 3 and second installation section 4 which are mutually spaced and used for installing bearings, the first installation section 3 and the second installation section 4 are respectively arranged at both ends of the iron core installation section 2.

[0024] A plurality of spring slots are first spring slot 51, second spring slot 52 and third spring slot 53; the first spring slot 51 is arranged at the first end a of the shaft body 100; the second spring slot 52 is arranged at the connection between the first installation section 3 and the iron core installation section 2; the third spring slot 53 is arranged at the connection between the second installation section 4 and the iron core installation section 2; after installing the elastic check ring, axial movement can be prevented.

[0025] The cross-sectional diameter of the first installation section 3 and the second installation section 4 is smaller than the cross-sectional diameter of the iron core installation section 2; the outer diameter of the first installation section 3 and the second installation section 4 is 12±0.005mm, the roughness is Ra0.4um, and the roundness is 3um. The second end b of the shaft body 100 is provided with gear section 6, the cross section of the gear section 6 is gear-shaped. The outer wall of the gear section 6 is provided with a plurality of spaced ribs, each rib is inclined on the outer wall of the gear section 6, so that the cross section of the gear section 6 is gear-shaped.

[0026] The outer peripheral wall of the gear segment 6 is provided with a hardening layer with a thickness of 0.5-1.5 mm. In order to improve the wear resistance of the outer peripheral wall surface of the gear segment and the toughness of the interior, the outer peripheral wall of the second mounting segment 4 is also provided with a hardening layer with a thickness of 0.5-1.5 mm.

Claims

1. A high-efficiency commercial paper shredder motor shaft, comprising a shaft body (100), wherein a first end (a) and a second end (b) are respectively formed at both ends of the shaft body (100), characterized in that: The shaft body (100) is provided with a plurality of retaining ring grooves for installing elastic retaining rings at intervals; the first end (a) of the shaft body (100) is provided with a flat section (1), and a flat section (11) is opened on the outer peripheral wall of the flat section (1); the shaft body (100) is also provided with a core mounting section (2), and a plurality of guide grooves (21) are provided on the outer peripheral wall of the core mounting section (2), and the guide grooves (21) extend axially.

2. The high-efficiency commercial shredder motor shaft according to claim 1, characterized in that: Both ends of the guide groove (21) are provided with tapered sections (22).

3. The high-efficiency commercial shredder motor shaft according to claim 2, characterized in that: The shaft body (100) is also provided with a first mounting section (3) and a second mounting section (4) that are spaced apart from each other and used for mounting bearings. The first mounting section (3) and the second mounting section (4) are respectively located at both ends of the iron core mounting section (2).

4. The high-efficiency commercial shredder motor shaft according to claim 3, characterized in that: The plurality of said circlip grooves are as follows: a first circlip groove (51) is provided at the first end (a) of the shaft body (100); A second snap ring groove (52) is provided at the connection between the first mounting section (3) and the core mounting section (2); and, The third snap ring groove (53) is located at the connection between the second mounting section (4) and the iron core mounting section (2).

5. The high-efficiency commercial shredder motor shaft according to claim 3, characterized in that: The cross-sectional diameters of the first installation section (3) and the second installation section (4) are both smaller than the cross-sectional diameter of the core installation section (2).

6. The high-efficiency commercial shredder motor shaft according to claim 3, characterized in that: The outer diameter of the first mounting section (3) and the second mounting section (4) is 12±0.005mm.

7. The high-efficiency commercial shredder motor shaft according to claim 2, characterized in that: The outer diameter of the core mounting section (2) is 12.1±0.04mm.

8. The high-efficiency commercial shredder motor shaft according to claim 1, characterized in that: The second end (b) of the shaft (100) is provided with a gear segment (6), and the cross section of the gear segment (6) is gear-shaped.

9. The high-efficiency commercial shredder motor shaft according to claim 8, characterized in that: The outer peripheral wall of the gear segment (6) is provided with a hardened layer, the thickness of which is 0.5-1.5mm.

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