WO2020087942A1

WO2020087942A1 - Novel gear

Info

Publication number: WO2020087942A1
Application number: PCT/CN2019/091791
Authority: WO
Inventors: 谭永胜; 谭永利
Original assignee: 金华市宇辰粉末冶金有限公司
Priority date: 2018-10-31
Filing date: 2019-06-18
Publication date: 2020-05-07
Also published as: CN109163069A

Abstract

The present invention relates to the technical field of gear structures, and particularly relates to a novel gear. The novel gear comprises a gear body; uniformly distributed toothlike protrusions are disposed at one end of the gear body; the multiple toothlike protrusions form a toothed surface, and a profiling tooth surface matching the toothed surface is provided at the other end of the gear body. Moreover, the profiling tooth surface is also formed by uniformly distributed toothlike protrusions, and the toothlike protrusions of the profiling tooth surface are in dislocation with the toothlike protrusions of the toothlike surface. The present invention provides a novel gear which is simple and stable in structure.

Description

A new type of gear

Technical field

The invention belongs to the technical field of gear structure, and particularly refers to a new type of gear.

Background technique

Gears are one of the necessary parts in mechanical transmission, especially bevel gears, which are more widely used and applied. The bevel gear is used to transmit the motion and power between the two intersecting shafts. In general machinery, the angle between the two shafts of the bevel gear is equal to 90 °. However, the current bevel gear production has the following problems: a. The processing cost of the bevel gear is relatively high, the traditional milling and planing process, the product raw material loss rate is high, and the processing surface will have processing damage, which requires more later The process is repaired, the processing is complicated, and waste products are easily generated during the processing; b. In order to overcome the problem of raw material loss, the powder metallurgy processing method is used, but the strength of the cone teeth is difficult to be guaranteed, and the use requirements do not meet the standards and cannot be effectively Mass production.

Summary of the invention

The purpose of the present invention is to provide a new type of gear with a simple and stable structure.

The purpose of the present invention is achieved as follows:

A new type of gear includes a gear body. One end of the gear body is provided with uniformly distributed tooth-shaped protrusions. Several toothed protrusions form a toothed surface. The profiling tooth surface of the profiling tooth surface is also composed of uniformly distributed tooth-shaped protrusions, and the protruding tooth surface of the profiling tooth surface is misaligned with the tooth-shaped protrusions of the tooth surface.

The tooth-shaped protrusions are oblique teeth, and the tooth-shaped surfaces are tapered tooth-shaped surfaces. The tooth-shaped protrusions of the tooth-shaped surfaces and the tooth-shaped protrusions of the profiled tooth surfaces continuously increase from the outside to the inside.

The tooth-shaped protrusions of the profile tooth surface and the tooth-shaped protrusions of the tooth surface are arranged in parallel.

The gear body is recessed inward at the middle of one end of the toothed surface to form a recessed portion, and at least two recessed holes are provided in the recessed portion.

The three concave holes are included, and the three concave holes are evenly distributed in the concave portion.

The gear body is die-cast by powder metallurgy process.

The gear body is provided with a shaft hole in the middle, and the gear body is provided with an extension at one end of the profile tooth surface.

Compared with the prior art, the present invention has outstanding and beneficial technical effects as follows:

1. The gear body of the present invention is die-cast using powder metallurgy technology to achieve efficient use of raw materials; in order to fundamentally solve the strength of the tooth surface, a profiled tooth surface is provided on the opposite side of the tooth surface, and the profiled teeth The tooth-shaped protrusions of the surface are misaligned with the tooth-shaped protrusions of the toothed surface. This structure can ensure that the actual thickness between the toothed surface and the profiled tooth surface is guaranteed. In the process of powder metallurgy, the position of the toothed surface The powder that can be pressed has a higher density, which directly improves the working strength and hardness of the tooth surface.

2. The present invention is a bevel gear, and the tooth-shaped protrusions of the tooth-shaped surface and the tooth-shaped protrusions of the profiled tooth surface continuously increase from the outside to the inside, in fact, the profiled tooth surface is a dislocated gear surface , The tooth-shaped protrusions of the profiling tooth surface and the tooth-shaped protrusions of the tooth surface are arranged in parallel, the fundamental reason for setting the profiling tooth surface is that in the process of powder metallurgy, the thickness between the gear surface and the profiling tooth surface is avoided Unevenness, to ensure the powder density of the tooth surface, to ensure the working strength and hardness of the tooth surface.

3. The gear body of the present invention is recessed inward at the middle of one end of the toothed surface to form a recessed portion. The recessed portion can remove the problem of stress concentration and save raw materials. The recessed portion is provided with at least two recessed holes, preferably three The concave hole is used in the actual use process to perform an emergency stop on the gear main body to ensure the stability of the structure.

4. A shaft hole is provided in the middle of the gear body of the present invention. A keyway can be added to the shaft hole according to actual requirements. The shaft hole is used for an external rotation source, and the gear body is provided with an extension at one end of the profiling tooth surface. This extension is used to increase the strength of the gear body. In order to increase the strength of the tooth surface, the present invention limits the thickness of the position of the tooth surface, so the connection position with the external rotation source will also be reduced accordingly, so through the integral extension Compensation is carried out to ensure the stability of the structure.

BRIEF DESCRIPTION

Figure 1 is one of the structural diagrams of the present invention;

Figure 2 is the second structural diagram of the present invention;

3 is a schematic diagram of the internal structure of the present invention;

Figure 4 is the third structural diagram of the present invention;

Figure 5 is the fourth structural diagram of the present invention;

6 is a reference diagram of the use state of the present invention.

In the picture: 1-gear body; 11-extension; a-toothed surface; 12-toothed protrusion; b-profiled toothed surface; 13-toothed protrusion; 14-shaft hole; 2-depression; 21-recessed hole; 3-driven bevel gear.

detailed description

The present invention will be further described below with specific embodiments in conjunction with the drawings, as shown in FIGS. 1-6:

A new type of gear includes a gear body 1. The gear body 1 is die-cast by powder metallurgy to achieve efficient use of raw materials. One end of the gear body 1 is provided with uniformly distributed tooth-shaped protrusions 12, and several tooth-shaped protrusions The teeth 12 form a toothed surface a. The other end of the gear body 1 is provided with a profiled tooth surface b adapted to the toothed surface a. The profiled tooth surface b is also composed of uniformly distributed tooth-shaped protrusions 13, Furthermore, the tooth-shaped protrusions 13 of the profiling tooth surface b are misaligned with the tooth-shaped protrusions 12 of the tooth surface a.

In order to fundamentally solve the strength of the toothed surface a, a profiled toothed surface b is provided on the opposite side of the toothed surface a, and the toothed protrusion 13 of the profiled toothed surface b and the toothed convexity of the toothed surface a Since the 12 phases are misaligned, this structure can ensure that the actual thickness between the tooth surface a and the profile tooth surface b is guaranteed. In the process of powder metallurgy, the powder at the position of the tooth surface a can be compressed at a higher density, thereby Directly improve the working strength and hardness of the tooth profile a.

The tooth-

shaped protrusions

12, 13 are oblique teeth, and the tooth-shaped surface a is a tapered tooth-shaped surface. The tooth-shaped protrusions 12 of the tooth-shaped surface a and the tooth-shaped protrusions 13 of the profiled tooth surface b are both from From outside to inside, it becomes higher continuously. In fact, the profiled tooth surface b is a misaligned gear surface a. The toothed protrusions 13 of the profiled tooth surface b and the toothed protrusions 12 of the toothed surface a are arranged in parallel. The basic reason of surface b is: in the process of powder metallurgy, to avoid uneven thickness between gear surface a and profile tooth surface b, to ensure the powder density of tooth surface a position, to ensure the working strength and hardness of tooth surface a .

The gear body 1 is recessed inward at the middle of one end of the toothed surface a to form a recessed portion 2. The recessed portion 2 can remove the problem of stress concentration and save raw materials. The recessed portion 2 is provided with at least two recessed holes 21, preferably There are three concave holes 21, and the concave holes 21 are used for the emergency stop of the gear body 1 during actual use to ensure the stability of the structure.

A shaft hole 14 is provided in the middle of the gear body 1, and a key slot can be added in the shaft hole 14 according to actual requirements. The shaft hole 14 is used for external rotation source, and the gear body 1 is provided with an extension at one end of the profiling tooth surface b 11. It is preferable that the outer diameter of the extension section 11 is smaller than the minimum inner diameter of the toothed surface a. The extension section 11 is used to increase the strength of the gear body 1. In order to improve the strength of the toothed surface a in the present invention, the position of the toothed surface a The thickness is limited, so the connection position with the external rotation source will be correspondingly reduced. Therefore, the integral extension 11 is used for compensation to ensure the stability of the structure.

The above embodiments are only preferred embodiments of the present invention and do not limit the scope of protection of the present invention accordingly. Therefore, any equivalent changes made according to the structure, shape and principle of the present invention should be covered by the protection of the present invention Within range.

Claims

A new type of gear includes a gear body (1), which is characterized in that one end of the gear body (1) is provided with uniformly distributed tooth-shaped protrusions (12), and several tooth-shaped protrusions (12) form a toothed surface (a), the other end of the gear body (1) is provided with a profiled tooth surface (b) adapted to the toothed surface (a), and the profiled tooth surface (b) is also composed of uniformly distributed tooth-shaped protrusions It is constituted by (13), and the tooth-shaped protrusions (13) of the profiling tooth surface (b) are misaligned with the tooth-shaped protrusions (12) of the tooth surface (a).
The novel gear according to claim 1, characterized in that the tooth-shaped protrusions (12, 13) are helical teeth, the tooth-shaped surface (a) is a tapered tooth-shaped surface, and the tooth-shaped surface (a) The tooth-shaped protrusions (12) and the tooth-shaped protrusions (13) of the profiled tooth surface (b) both continuously increase from the outside to the inside.
The novel gear according to claim 2, characterized in that the tooth-shaped protrusions (13) of the profiling tooth surface (b) and the tooth-shaped protrusions (12) of the tooth surface (a) are arranged in parallel.
The new-type gear according to claim 1, characterized in that the gear body (1) is recessed inwardly at the middle of one end of the toothed surface (a) to form a recessed portion (2), and at least two are provided in the recessed portion (2) Recessed holes (21).
The novel gear according to claim 4, characterized in that it includes three said concave holes (21), and the three concave holes (21) are evenly distributed in the concave portion (2).
The new-type gear according to claim 1, characterized in that the gear body (1) is die-cast by a powder metallurgy process.
The novel gear according to claim 1, characterized in that: the gear body (1) is provided with a shaft hole (14) in the middle, and the gear body (1) is provided with an extension section at one end of the profiling tooth surface (b) ( 11).