CN203285951U

CN203285951U - Gear

Info

Publication number: CN203285951U
Application number: CN2013203084809U
Authority: CN
Inventors: 潘荣国
Original assignee: ZHEJIANG DONGXIN DYNAMICAL CO Ltd
Current assignee: ZHEJIANG DONGXIN DYNAMICAL CO Ltd
Priority date: 2013-05-31
Filing date: 2013-05-31
Publication date: 2013-11-13
Anticipated expiration: 2023-05-31

Abstract

The utility model relates to a gear. The gear comprises a gear body, an upper end face and a lower end face, a gear inner hole used for mounting a gear shaft is disposed in the central position of the gear, the gear inner hole is a through hole shaped like a circular truncated cone, and the hole diameter of the gear inner hole reduces from the upper end face to the lower end face. The gear with an optimized structure is provided; the gear inner hole which is a through hole shaped like a circular truncated cone is arranged at the center of the gear, i.e., the gear inner hole is configured to have a reasonable conicity, so the assembly difficulty that the gear shaft must be placed very right when being assembled into the gear is overcome, non-concentricity generated by assembly gaps during manufacture is also overcome, the possibility of axial play is avoided, stress concentration does not occur during operation, the assembly difficulty is reduced, and the working efficiency and working quality are raised.

Description

A kind of gear

Technical field

The utility model belongs to mechanical technical field, particularly a kind of structure by improving the bore that is used for the mounting teeth wheel shaft on gear simplifying installation difficulty, promote the gear in working life.

Background technique

Gear is to have tooth can mesh continuously the mechanical component that transmits motion and power on wheel rim.On gear, except most important mechanical part---the gear teeth, generally all also can be provided for installing the through hole of the gear shaft that can driven gear rotates, gear shaft refers to the mechanical parts that support rotational parts and turn round therewith to transmit motion, moment of torsion or moment of flexure.

in prior art, the through hole that is used for the gear shaft of installation energy driven gear rotation generally occurs with the simplest through-hole form, it is tubular hole, aperture is consistent to another end face from an end face of gear, the problem that the through hole of this structure exists is, when gear is wanted the assembling gear axle, gear shaft must be put to such an extent that very just just can assemble, in case gear shaft tilts namely can't install, waste time and energy, simultaneously, the gear of this structure is in the test run operation process of reality, because through hole is straight hole, the stressed meeting of gear shaft is more concentrated, also the Accident due to quality of axial motion can occur, the workmanship that impact is actual.

The model utility content

the technical problem that the utility model solves is, in prior art, the through hole that is used for the gear shaft of installation energy driven gear rotation generally occurs with the simplest through-hole form, it is tubular hole, aperture is consistent to another end face from an end face of gear, and cause when gear is wanted the assembling gear axle, gear shaft must be put to such an extent that very just just can assemble, in case gear shaft tilts namely can't install, waste time and energy, the gear of this structure is in the test run operation process of reality simultaneously, the stressed meeting of gear shaft is more concentrated, the Accident due to quality of axial motion more easily occurs, the problem of the workmanship that impact is actual, and then provide a kind of gear of optimizing structure.

The technological scheme that the utility model adopts is, a kind of gear, comprise the gear body, described gear comprises upper-end surface and lower end surface, the central position of described gear is provided with the bore for the mounting teeth wheel shaft, described bore is the frustoconic shape through hole, and the aperture of described bore is reduced by upper-end surface to the lower end surface of gear.

Preferably, in the frustoconic shape through hole of described bore, taper ratio is 1:3～1:10.

The utility model provides a kind of gear of optimizing structure, the bore of frustoconic shape through hole is set by the central position at gear, be about to bore one rational tapering is set, overcome gear must be put gear shaft when the assembling gear axle very positive assembling difficulty, and due to owing to being provided with tapering, the nonconcentricity that while also having overcome processing, fit up gap produces, avoided the possibility of axial motion, the problem that also not there will be stress to concentrate during running, also promoted working efficiency and workmanship when having reduced assembling difficulty.

Description of drawings

Fig. 1 is plan view structural representation of the present utility model;

Fig. 2 is the broken section figure structure schematic representation that dissects toward edge with right angle from the Gear center position of the present utility model.

Embodiment

Below in conjunction with embodiment, the utility model is described in further detail, but protection domain of the present utility model is not limited to this.

As shown in the figure, the utility model relates to a kind of gear, comprise gear 1 body, described gear 1 comprises upper-end surface 2 and lower end surface 3, the central position of described gear 1 is provided with the bore 4 for the mounting teeth wheel shaft, described bore 4 is the frustoconic shape through hole, and the aperture of described bore 4 is reduced by upper-end surface 2 to the lower end surface 3 of gear 1.

In the frustoconic shape through hole of described bore 4, taper ratio is 1:3～1:10.

In the utility model, by bore 4 being set to the frustoconic shape through hole of tapering, the feature of utilizing its aperture to be reduced gradually by upper-end surface 2 to the lower end surface 3 of gear 1, must be with gear shaft fully to living the problem that bore 4 could successful installations while having solved the assembling gear axle.Simultaneously,, owing to bore 4 being set to the frustoconic shape through hole of tapering, therefore can overcome in operation, the quality problems of axial motion occur due to the existence of axial clearance, also can overcome in prior art, the problem that 1 stress of gear shaft and gear is concentrated.

In the utility model, in the frustoconic shape through hole with bore 4, taper ratio is set to 1:3～1:10, has guaranteed that the tapering of frustoconic shape through hole can be not excessive, and namely the concentrated problem of suitable solution axial motion and stress, the shake of gear shaft can not occur.

In the utility model, the taper ratio of described bore is made as 1:5, the most realistic job requirements.

the utility model has solved in prior art, the through hole that is used for the gear shaft of installation energy driven gear 1 rotation generally occurs with the simplest through-hole form, it is tubular hole, aperture is consistent to another end face from an end face of gear 1, and cause when gear 1 is wanted the assembling gear axle, gear shaft must be put to such an extent that very just just can assemble, in case gear shaft tilts namely can't install, waste time and energy, the gear 1 of this structure is in the test run operation process of reality simultaneously, the stressed meeting of gear shaft is more concentrated, the Accident due to quality of axial motion more easily occurs, the problem of the workmanship that impact is actual, the bore 4 of frustoconic shape through hole is set by the central position at gear 1, be about to bore 4 a rational tapering is set, overcome gear 1 must be put gear shaft when the assembling gear axle very positive assembling difficulty, and due to owing to being provided with tapering, the nonconcentricity that while also having overcome processing, fit up gap produces, avoided the possibility of axial motion, the problem that also not there will be stress to concentrate during running, working efficiency and workmanship have also been promoted when having reduced assembling difficulty.

Claims

1. gear, comprise the gear body, described gear comprises upper-end surface and lower end surface, the central position of described gear is provided with the bore for the mounting teeth wheel shaft, it is characterized in that: described bore is the frustoconic shape through hole, and the aperture of described bore is reduced by upper-end surface to the lower end surface of gear.

2. a kind of gear according to claim 1, it is characterized in that: in the frustoconic shape through hole of described bore, taper ratio is 1:3～1:10.