CN210770115U

CN210770115U - Spiral bevel gear

Info

Publication number: CN210770115U
Application number: CN201921791352.8U
Authority: CN
Inventors: 戴坤龙
Original assignee: YANGZHOU HANJIANG DECHANG PLASTIC FACTORY
Current assignee: YANGZHOU HANJIANG DECHANG PLASTIC FACTORY
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2020-06-16
Anticipated expiration: 2029-10-24

Abstract

The utility model discloses a spiral bevel gear, a serial communication port, include: the gear disc body, the cross section of gear disc body is circular, longitudinal section is isosceles trapezoid, be provided with two at least arc teeth on the lateral wall of gear disc body, the arc tooth is arc heliciform evenly distributed, constitute arc heliciform evenly distributed's sunken tooth's socket between the adjacent arc tooth, the lower extreme of gear disc body is connected with the gear shaft, the middle part of gear disc body and gear shaft is provided with the connection shaft hole, the gear shaft outside is provided with a metal outer lane. The novel spiral bevel gear has the advantages that on the premise of normal work, the noise and the cost are reduced while the normal work is guaranteed for the transmission part with low torque requirement.

Description

Spiral bevel gear

Technical Field

The utility model relates to the technical field of gears, especially, relate to a spiral bevel gear.

Background

At present, along with the development of the mechanical industry, the gears are used more and more, and the requirements on the gears are also more and more.

The spiral bevel gear is one of spiral bevel gears, and is widely applied to the field of mechanical transmission due to the advantages of large overlapping coefficient, strong bearing capacity, high transmission ratio, stable transmission, low noise and the like. At present, in some large-scale high-torque mechanical equipment, in order to increase the firmness of the gear and prevent the gear face from being broken, the thickness of the gear face is generally thicker, but the material cost of an enterprise is correspondingly increased at the same time, but the part can generate noise during working, and adverse effects can be caused on working production.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide one kind under the prerequisite of normal work, to the little transmission part of moment of torsion requirement, noise reduction and the novel spiral bevel gear of cost when guaranteeing normal work.

In order to achieve the above object, the utility model adopts the following technical scheme:

designing a spiral bevel gear, comprising: the gear disk body, the cross section of gear disk body is circular, longitudinal section is isosceles trapezoid, be provided with two at least arc teeth on the lateral wall of gear disk body, the arc tooth is arc heliciform evenly distributed, constitute arc heliciform evenly distributed's sunken tooth's socket between the adjacent arc tooth, the lower extreme of gear disk body is connected with vertical columniform gear shaft, the longitudinal center line of gear shaft and the coincidence of the longitudinal center line of gear disk body, gear disk body middle part is provided with the cylindrical connection shaft hole that is located gear disk body and gear shaft, the gear shaft outside is provided with a metal outer lane.

A metal inner ring is embedded in the connecting shaft hole in the middle of the gear disc body and the gear shaft, so that the deformation of the spiral bevel gear is further reduced.

The gear shaft and the gear plate body are made of modified nylon or PEEK plastic grease, so that noise generated during working is reduced.

The gear shaft is provided with two threaded holes penetrating through the wall of the gear shaft for connecting bolts, positioning and fixing the connection with the transmission component.

Further, the included angle between the two threaded holes is 120 degrees.

And through holes corresponding to the threaded holes of the gear shaft are arranged on the metal outer ring and the metal inner ring.

The gear disc body and the gear shaft are formed through one-time injection molding.

And the arc-shaped teeth on the gear disc body and the two threaded holes on the gear shaft are both formed by one-time injection molding.

The inner wall of the metal outer ring is attached to the outer wall of the gear shaft, and the outer wall of the metal inner ring is attached to the connecting shaft hole wall.

The material of the metal outer ring and the metal inner ring is 20 # steel.

The utility model discloses the effect that reaches:

i) because the main body of the utility model is made of plastic, the utility model can generate smaller noise during working;

ii) the plastic part of the utility model is directly molded by one-time injection molding, thereby avoiding the burr generation phenomenon when tapping the threaded hole and saving the cost caused by secondary processing and burr cleaning;

and iii) the plastic part is adopted to replace a metal part, so that the production cost is reduced, and the production efficiency is improved.

Drawings

Fig. 1 is a front view of the present invention;

fig. 2 is a top view of the present invention;

fig. 3 is a left side view of the present invention;

fig. 4 is an exploded view of the present invention.

The meaning of the reference symbols in the figures:

1-arc teeth, 2-tooth grooves, 3-gear disc bodies, 4-connecting shaft holes, 5-fixing screw holes, 6-gear shafts, 7-metal outer rings, 8-metal outer ring holes, 9-metal inner rings and 10-metal inner ring holes.

Detailed Description

The invention will be further described with reference to the following drawings and specific examples:

the utility model provides a spiral bevel gear, as shown in figure 2, spiral bevel gear includes gear disk body 3, and gear disk body 3's cross section is circular, and longitudinal section is isosceles trapezoid, is provided with two at least arc teeth 1 on gear disk body 3's the lateral wall, and arc tooth 1 is arc heliciform evenly distributed, constitutes arc heliciform evenly distributed's sunken tooth's socket 2 between the adjacent arc tooth 1. As shown in fig. 1 and 3, the lower end of the gear plate body 3 is connected with a longitudinal cylindrical gear shaft 6, the longitudinal central line of the gear shaft 6 coincides with the longitudinal central line of the gear plate body 3, a connecting shaft hole 4 which is through up and down is arranged in the gear plate body 3 and the gear shaft 6, two fixing screw holes 5 with an included angle of 120 degrees are arranged on the gear shaft 6, and the fixing screw holes 5 penetrate through the wall of the gear shaft. As shown in fig. 4, a metal outer ring 7 is further arranged on the outer side of the spiral bevel gear wheel shaft 6, the inner wall of the metal outer ring 7 is attached to the outer wall of the gear shaft, two metal outer ring holes 8 are further formed in the metal outer ring 7, and the metal outer ring holes 8 correspond to the fixing screw holes 5. A metal inner ring 9 is embedded in the connecting shaft hole 4, the wall of the connecting shaft hole 4 of the metal inner ring 9 is attached to the wall of the connecting shaft hole, two metal inner ring holes 10 are further formed in the metal inner ring 9, and the metal inner ring holes 10 correspond to the fixing screw holes 5.

The spiral bevel gear of this embodiment, at the during operation, the drive disk assembly is connected in connecting shaft hole 4, and outside metal outer lane hole 8 is corresponding with fixed screw 5, and bolted connection plays location and fixed effect in metal outer lane hole 8 and fixed screw 5 to the drive disk assembly. Because the torque is not big when this part transmission, so the spiral bevel gear is made with moulding the piece, and the material of moulding the piece is modified nylon or PEEK plastic grease to the noise of spiral bevel gear when working has been reduced. The plastic part is directly molded by one-time injection molding, the arc-shaped teeth 1 on the gear disc body 3 and the two fixed screw holes 5 on the gear shaft 6 are directly molded by one-time injection molding, the phenomenon of burrs generated when the threads of the screw holes 5 are fixed by tapping is avoided, and the cost for secondary processing and burr cleaning is saved. In order to ensure the stability of the gear during working and solve the problem of deformation of the part when the thread is tightened in the actual use of the part, a metal outer ring 7 is arranged on the outer side of a spiral bevel gear wheel shaft 6, a metal inner ring 9 is embedded in a connecting shaft hole 4, the metal outer ring 7 and the metal inner ring 9 are made of 20 # steel, and a seamless pipe is made of a commonly used material. The inner wall of the metal outer ring 7 is attached to the outer wall of the gear shaft, two metal outer ring holes 8 are further formed in the metal outer ring 7, and the metal outer ring holes 8 correspond to the fixing screw holes 5. The wall of the connecting shaft hole 4 of the metal inner ring 9 is attached, two metal inner ring holes 10 are further formed in the metal inner ring 9, and the metal inner ring holes 10 correspond to the fixing screw holes 5. The bolt is connected with the metal outer ring hole 8 and the fixing screw hole 5 to fix the arc-tooth bevel gear, so that the structural stability of the part during working is ensured.

To sum up, the utility model discloses a gear is a spiral bevel gear, and spiral bevel gear's whole material adopts the material of moulding the piece, and the good problem of coordination that warp and batch production can not be fine has been solved to metal outer lane of outside laminating and an embedded metal inner circle, has satisfied the requirement of saving the cost as far as possible under the little condition of moment of torsion when the transmission to the part.

As mentioned above, although the present invention has been shown and described with reference to certain preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A spiral bevel gear comprising: the gear disc body, the cross section of gear disc body is circular, longitudinal section is isosceles trapezoid, be provided with two at least arc teeth on the lateral wall of gear disc body, the arc tooth is arc heliciform evenly distributed, constitute arc heliciform evenly distributed's sunken tooth's socket between the adjacent arc tooth, the lower extreme of gear disc body is connected with the gear shaft, the middle part of gear disc body and gear shaft is provided with the connection shaft hole, the gear shaft outside is provided with a metal outer lane.

2. The spiral bevel gear according to claim 1, wherein a metal inner race is fitted into the coupling shaft hole in the middle of the gear plate body and the gear shaft.

3. The spiral bevel gear according to claim 1, wherein the gear shaft and the gear plate body are made of modified nylon or PEEK plastic.

4. A spiral bevel gear according to claim 1 wherein the gear shaft is provided with two threaded holes through the wall of the gear shaft.

5. A spiral bevel gear according to claim 4 wherein the angle of the two threaded bores is 120 °.

6. The spiral bevel gear according to claim 1, wherein the metal outer ring and the metal inner ring are provided with through holes corresponding to the threaded holes of the gear shaft.

7. A spiral bevel gear according to claim 1, wherein the gear plate body and the gear shaft are formed by one-shot injection molding.

8. The spiral bevel gear according to claim 7, wherein the spiral teeth of the gear plate and the two threaded holes of the gear shaft are formed by one-time injection molding.

9. The spiral bevel gear according to claim 1, wherein the inner wall of the metal outer race is attached to the outer wall of the gear shaft, and the outer wall of the metal inner race is attached to the connecting shaft hole wall.

10. The spiral bevel gear according to claim 1, wherein the outer and inner metal rings are made of 20 gauge steel.