CN111059253A

CN111059253A - Gear wheel

Info

Publication number: CN111059253A
Application number: CN201911342204.2A
Authority: CN
Inventors: 洪健荣
Original assignee: Shenzhen New South China Sea Transmission Machinery Co Ltd
Current assignee: Shenzhen New South China Sea Transmission Machinery Co Ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-04-24

Abstract

The invention discloses a gear, comprising: the tooth-shaped structure comprises a body, wherein a plurality of teeth are arranged on the outer contour of the body; the first square hole is formed in the body and penetrates through the body; the second square hole is formed in the body and penetrates through the body, the first square hole is partially overlapped with the second square hole, and the first square hole and the second square hole are different in size. The first square hole and the second square hole can be correspondingly matched with rotating shafts with different sizes, so that the compatibility of the gear is improved, the manufacture of a gear model is reduced, and the production cost of the gear is reduced.

Description

Gear wheel

Technical Field

The invention relates to the field of heavy-load transmission equipment, in particular to a gear.

Background

At present, heavy load transmission equipment can be used to the great goods of transportation weight, if use ordinary circular pivot and the gear that has the round hole to drive the transportation area motion on heavy load transmission equipment, then can appear owing to drive the transmission band and rotate the phenomenon that needs great axle power to make and skid easily between pivot and the gear, lead to the unable gear rotation that drives of pivot, can't realize the transportation effect of transmission band. Therefore, the existing heavy-load transmission equipment generally adopts a square rotating shaft and a gear with a square hole, and the square rotating shaft is inserted into the gear with the square hole to drive the gear to rotate because the shapes of the square rotating shaft and the gear are mutually matched and have certain edges and corners, so that the phenomenon that the gear and the rotating shaft slip can be avoided.

However, because the existing transmission equipment has square rotating shafts with different sizes, the corresponding gears with square holes with different sizes can be matched with the square rotating shafts, the specifications of the existing gears are determined when the existing transmission equipment is delivered from a factory and cannot be changed, if the gears with the square holes with the sizes matched with each other are found in the process of replacing the gears, the tooth heights or the specifications of the gears may not be matched with the existing transmission equipment, so that the compatibility of the gears is poor, and a plurality of gear models with different sizes are required to be customized to produce the gears with different square holes, so that the production cost of the gears is greatly increased.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a gear, which can improve the compatibility of the gear and reduce the production cost of the gear.

The purpose of the invention is realized by adopting the following technical scheme:

a gear, comprising:

the tooth-shaped structure comprises a body, wherein a plurality of teeth are arranged on the outer contour of the body;

the first square hole is formed in the body and penetrates through the body;

the second square hole is formed in the body and penetrates through the body, the first square hole is partially overlapped with the second square hole, and the first square hole and the second square hole are different in size.

Further, the axle centers of the first square hole and the second square hole are coincided with the axle center of the body.

Further, the second square hole is rotated by 45 ° with respect to the first square hole about the axis.

Further, the first square hole and the second square hole are both of square structures.

Further, the sideline width of the second square hole is smaller than that of the first square hole.

Furthermore, each vertex of the second square hole protrudes out of the edge line corresponding to the first square hole.

Further, each vertex of the second square hole is positioned on the extension line of the middle line of the corresponding side line of the first square hole.

Further, each vertex of the first square hole and the second square hole is provided with an arc edge used for connecting two adjacent sidelines.

Further, relative to the intersection point of the extension lines of the two adjacent sidelines, the circle center corresponding to the arc side is closer to the axis of the body.

Compared with the prior art, the invention has the beneficial effects that:

at the gear be equipped with first square hole and second square hole on the body, the size of first square hole and second square hole is inequality for first square hole and second square hole can correspond the pivot of matcing unidimensional not, have promoted the compatibility of gear, reduce the preparation of gear model simultaneously, have reduced the manufacturing cost of gear.

Drawings

FIG. 1 is a schematic view of the overall construction of the gear of the present invention;

FIG. 2 is a schematic view of the gear structure of the present invention (the dotted frame is a first square hole);

FIG. 3 is an enlarged view of a portion of area A of FIG. 2;

fig. 4 is a schematic view of the gear structure of the present invention (the dashed frame is a second square hole).

In the figure: 1. a body; 2. teeth; 3. a first square hole; 4. a second square hole; 5. and (4) arc edge.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.

A gear is compatible with two square rotating shafts with different sizes, the compatibility of the gear is improved, and the production cost of the gear can be reduced.

As shown in fig. 1 to 4, the gear comprises a body 1, the body 1 is of a cylindrical structure, the body 1 has a certain thickness, the service life of the gear can be prolonged, and the gear is suitable for common transportation equipment and can also be applied to heavy-duty transportation equipment; the outer contour of the body 1 is provided with a plurality of teeth 2, the teeth 2 are uniformly distributed on the outer contour of the body 1, and the height of the teeth 2 and the distance between adjacent teeth 2 can be designed according to actual transportation equipment specifications.

And the body 1 is provided with a first square hole 3, and the first square hole 3 penetrates through the body 1, so that a square rotating shaft can penetrate through the first square hole 3, and the gear is driven to rotate synchronously. And the body 1 is also provided with a second square hole 4, the second square hole 4 penetrates through the body 1, and the first square hole 3 and the second square hole 4 are partially overlapped, so that the volume of the body 1 can be reduced, and the production cost can be reduced.

The sizes of the first square hole 3 and the second square hole 4 are different, so that the gear can be adapted to rotating shafts with different sizes and specifications, and the compatibility of the gear is improved.

In order to further reduce the volume of the body 1, the axes of the first square hole 3 and the second square hole 4 are overlapped with the axis of the body 1, so that a larger overlapping area is formed between the first square hole 3 and the second square hole 4, the first square hole 3 and the second square hole 4 can be gathered at the middle position of the body 1, and the stability of the rotation of the gear is ensured.

The first square hole 3 and the second square hole 4 are both of square structures and are adapted to a common square column rotating shaft with a square section on the market; when the square rotating shaft is inserted into the first square hole 3 or the second square hole 4, the edge angle position of the square rotating shaft is matched with the edge angle position of the square hole on the gear, so that the phenomenon that the rotating shaft slips with the gear when rotating is avoided, and the axial force of the gear is improved; and the sidelines of the first square hole 3 and the second square hole 4 protrude towards the left side and the right side of the body 1, so that the contact area of the first square hole 3, the second square hole 4 and the rotating shaft is increased, the friction force between the gear and the rotating shaft is improved, the service life of the gear can be prolonged, and the probability of breakage of the gear in the rotating process is reduced.

In this embodiment, the width of the side line of the second square hole 4 is smaller than the width of the side line of the first square hole 3, that is, the size of the second square hole 4 is smaller than the size of the first square hole 3; under the condition that the first square hole 3, the second square hole 4 and the body 1 are coaxial, each vertex of the second square hole 4 protrudes out of the edge line corresponding to the first square hole 3, so that each edge line of the first square hole 3 is provided with a part of right-angle edges of the second square hole 4.

The most preferable situation is that the second square hole 4 rotates 45 degrees relative to the first square hole 3 by taking the axis as an axis, so that each vertex of the second square hole 4 is positioned on the extension line of the central line of the corresponding side line of the first square hole 3, and the right-angle side of the second square hole 4 is highlighted at the midpoint position of each side line of the first square hole 3, so that the hole opening process of the first square hole 3 and the second square hole 4 is simpler and more accurate, the production difficulty is reduced, and the appearance of the gear is more attractive; meanwhile, the lengths of the two right-angle sides which are highlighted outside the edge line of the first square hole 3 are the same, so that when the rotating shaft is inserted into the second square hole 4 to drive the gear to rotate clockwise or anticlockwise, the force generated by the rotating shaft abutting against the edge line of the second square hole 4 can be uniformly applied to the body 1, the rotation of the gear is more stable, the situation that the gear is broken can be reduced, and the service life of the gear is prolonged.

Because the rotating shaft needs to be inserted into the first square hole 3 or the second square hole 4 and the whole gear is driven to rotate through the rotation of the rotating shaft, the fit degree of the size of the rotating shaft and the size of the square hole is high, and a relatively obvious gap cannot be reserved between the rotating shaft and the square hole after the rotating shaft is inserted into the corresponding square hole; under the condition that the rotating shaft is highly matched with the square hole, the outer contour of the rotating shaft is tightly attached to the square hole, so that the friction force between the rotating shaft and the square hole is large, and the gear is not favorably dismounted from the rotating shaft.

In order to solve the problem of friction between the rotating shaft and the square hole, each vertex of the first square hole 3 and the second square hole 4 is provided with an arc edge 5 for connecting two adjacent sidelines, as shown in fig. 3, the opening of the arc edge 5 faces to the axis of the body 1, and relative to the intersection point b of the extension lines of the two adjacent sidelines, the circle center a point corresponding to the arc edge 5 is closer to the axis of the body 1, so that a certain gap exists between the right angle of the rotating shaft and the arc edge 5, and the friction between the inner wall of the square hole and the rotating shaft is reduced, and the gear can be easily dismounted from the rotating shaft; meanwhile, the rotating shaft can be freely inserted into the square hole, the abutting and the stress between the rotating shaft and the side line of the square hole are not influenced, and the normal matching rotation action between the rotating shaft and the gear can be ensured.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims

1. A gear, comprising:

the first square hole is formed in the body and penetrates through the body;

2. The gear of claim 1, wherein the axes of the first and second square holes are coincident with the axis of the body.

3. The gear according to claim 2, wherein the second square hole is rotated by 45 ° about the axial center with respect to the first square hole.

4. The gear of claim 3 wherein the first and second square holes are each provided in a square configuration.

5. The gear of claim 4, wherein the sideline width of the second square aperture is less than the sideline width of the first square aperture.

6. The gear of claim 5 wherein each vertex of the second square hole protrudes beyond the corresponding edge of the first square hole.

7. The gear of claim 6 wherein each vertex of the second square aperture is located on an extension of a midline of a corresponding side line of the first square aperture.

8. The gear according to claim 7, wherein an arc edge for connecting two adjacent sidelines is provided at each vertex of the first square hole and the second square hole.

9. The gear according to claim 8, wherein the circle center corresponding to the arc side is closer to the axis of the body relative to the intersection point of the extension lines of two adjacent sidelines.