CN109099134A - A kind of unidirectional heavy-duty gear structure - Google Patents

Abstract

The invention discloses a kind of unidirectional heavy-duty gear structures, including gear, with teeth and tooth socket is arranged in the gear, the tooth is made of quenching layer and supporting layer, the supporting layer is greater than the thickness of quenching layer, the quenching layer includes hardened layer and high hard surface layer, and the thickness of the hardened layer is greater than the thickness of high hard surface layer, and the hardness of the high hard surface layer falls sharply in gradual change type to supporting layer.Gear structure of the invention is simple, the strength of gear teeth is high, wearability is good and the service life is long, and gear capacity is high, effectively prevent the hardened layer deflection of the tooth of gear excessive, so that delamination situation occurs for high hard surface layer and quenching layer falls off crack conditions, the degree of wear of hardened layer is not high.

Description

A kind of unidirectional heavy-duty gear structure

Technical field

The present invention relates to field of gears more particularly to a kind of unidirectional heavy-duty gear structures.

Background technique

It is well known that gear is components crucial in mechanical equipment, it is widely used in automobile, aircraft, tank, wheel The industrial circles such as ship.It has many advantages, such as accurate, the compact-sized long service life of transmission.Gear drive be in modern age machine most A kind of common mechanical oscillation are a kind of important forms for transmitting machine power and movement, are engineering goods important foundation parts. It has power bracket big compared with band, chain, friction, hydraulic etc. are mechanical, and transmission efficiency is high, peripheral speed is high, transmission ratio is quasi- Really, the series of advantages such as long service life, dimensional structure be small.Therefore it has become the indispensable transmission of many engineering goods The maximum driving form of proportion in component and machine.Due to prominent position of the gear in industrial development, make gear It is acknowledged as the pulling that a kind of industrialized symbol has benefited from automobile, wind-powered electricity generation, nuclear power industry in recent years, automobile gear processing machine Bed, the demand growth of Big sized gear machining tool are very dazzling.It is reported that with the increase of gear cutting machine demand, closely The enterprise for being related to gear cutting machine manufacture over year is also increasing.Either traditional automobile, ship, aerospace, military project Etc. industries, still the industries such as high-speed rail emerging in recent years, railway, electronics, all propose the fast development of Machine Tool Industry Pressing needs, to gear cutting machine, manufacturer is put forward new requirements.

In rotation, actual gear load is different usual gear, and often based on one-way abrasion, gear rises wear-resisting Effect is its depth for quenching layer, quenches thickness, and then gear is wear-resisting, still, quenches the too thick easy embrittlement of layer.Many institute's weeks Know, the quenching layer depth of gear is excessively shallowly all unfavorable to contacting and being bent bearing capacity.But quenching layer is also not more deeper better, it is best or Case depth appropriate can make the flank of tooth and tooth root intensity (bearing capacity) all with higher.

The tooth of gear is stress heavy duty face on one side, and another side is seldom heavily loaded in the case where reversion, in addition, gear is at one Seldom reversed installation after the installation of direction, belongs to underloading face, and existing processing method is either stress heavy duty face or underloading face It heats, quenches together all together, although meeting the technique requirement of quenching, be reduction of the quality of gear, the stress of sawtooth Heavily loaded face is easier to be worn in subsequent processing operation, and service life shortens.

Based on this, it is necessary to study a kind of unidirectional heavy-duty gear structure.

Summary of the invention

It is an object of the invention to overcome problem above of the existing technology, a kind of unidirectional heavy-duty gear structure is provided, Structure is simple, and the strength of gear teeth of the invention is high, wearability is good and the service life is long, and gear capacity is high.

To realize above-mentioned technical purpose and the technique effect, the invention is realized by the following technical scheme:

With teeth and tooth socket is arranged in a kind of unidirectional heavy-duty gear structure, including gear, the gear, and the tooth is by quenching Layer and supporting layer composition, the supporting layer are greater than the thickness of quenching layer, and the quenching layer includes hardened layer and high hard surface layer, institute The thickness for stating hardened layer is greater than the thickness of high hard surface layer, and the hardness of the high hard surface layer falls sharply in gradual change type to supporting layer, The mark structure is consistent with quenching layer, including internal hardened layer and external high hard surface layer.

Preferably, the thickness setting of the high hard surface layer, in 0.1-1.3mm, the hardness of the hardened layer is in gradual change type Fall sharply to supporting layer.

Preferably, the deflection of the hardened layer is no more than the overall thickness of quenching layer, the thickness of the hardened layer, which accounts for, to be quenched The 70%-95% of flame layer thickness, the relational expression of the depth of quenching of tooth are the depth of quenching=hardened layer thickness+high hard surface layer Thickness.

Preferably, the thickness of the supporting layer is greater than 2-5 times of quenching layer.

Preferably, the gear is made of 20CrMnTi or 40CrMnTi.

Preferably, being provided with locating slot in the gear.

Preferably, the tooth reaches quenching layer and the corresponding thickness of supporting layer by unilateral side quenching or non-uniform hardening.

Preferably, the gear is provided with label, the label and tooth rotationally clockwise direction/side counterclockwise To consistent.

Preferably, the label is, the groove is provided with the hardometer for detecting tooth hardness, described recessed Slot is consistent with the hardness of tooth.

The beneficial effects of the present invention are:

1. the intensity of the gear teeth is high, wearability is good and the service life is long, bearing capacity is high；

2. effectively prevent hardened layer deflection excessive so that high hard surface layer occur delamination situation and quenching layer fall off it is disconnected Split situation；

3. the flexible deformation that high hard surface layer is able to bear is big；

4. the degree of wear of hardened layer is not high.

The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention, And can be implemented in accordance with the contents of the specification, with presently preferred embodiments of the present invention and attached drawing is cooperated to be described in detail below.This hair Bright specific embodiment is shown in detail by following embodiment and its attached drawing.

Detailed description of the invention

The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:

Fig. 1 is for structural schematic diagram of the present invention；

Fig. 2 is 2 structural schematic diagram of tooth of the present invention.

Figure label explanation: gear 1, tooth 2, tooth socket 3 quench layer 4, supporting layer 5, hardened layer 401, high hard surface layer 402, locating slot 6, label 7.

Specific embodiment

The invention will be further described with reference to the accompanying drawing:

Referring to figs. 1 to shown in Fig. 2, a kind of unidirectional heavy-duty gear structure, including gear 1, the gear 1 are arranged with teeth 2 and tooth socket 3, the tooth 2 be made of quenching layer 4 and supporting layer 5, the supporting layer 5 be greater than quenching layer 4 thickness, the quenching Layer 4 includes hardened layer 401 and high hard surface layer 402, and the thickness of the hardened layer 401 is greater than the thickness of high hard surface layer 402, institute The hardness for stating high hard surface layer 402 falls sharply in gradual change type to supporting layer 5.

In embodiments of the present invention, the hardness of high hard surface layer 402 falls sharply in gradual change type to supporting layer 5, such as high hard table The hardness of surface layer 402 tapers off, and trend HRC62, HRC58, HRC54 are similar to successively decrease to supporting layer 5.

Preferably, the thickness of the high hard surface layer 402 is arranged in 0.1-1.3mm, the hardness of the hardened layer 401 is in Gradual change type falls sharply to supporting layer 5.

In embodiments of the present invention, the thickness of hardened layer 401 is thick, and deflection is small；The hardness of hardened layer 401 is in gradual change type Fall sharply to supporting layer 5, for example, the hardness of hardened layer 401 tapers off, trend HRC62, HRC58, HRC54 are similar passs to supporting layer 5 Subtract, the abrasion or deformation of hardened layer is effectively ensured.

Preferably, the deflection of the hardened layer 401 is no more than the overall thickness of quenching layer 4, the thickness of the hardened layer 401 Degree accounts for the 70%-95% of quenching 4 thickness of layer, and the relational expression of the depth of quenching of tooth 2 is thickness+height of the depth of quenching=hardened layer 401 The thickness of hard surface layer 402.

Preferably, the thickness of the supporting layer 5 is greater than 2-5 times of quenching layer 4.

Preferably, the gear 1 is made of 20CrMnTi or 40CrMnTi.

Preferably, being provided with locating slot 6 in the gear 1.

Preferably, the tooth 2 reaches quenching layer 4 by unilateral side quenching or non-uniform hardening and supporting layer 5 is corresponding thick Degree.

Preferably, the gear 1 is provided with label 7, the label 7 and 2 rotationally clockwise directions of tooth/inverse time Needle direction is consistent.

Preferably, the label 7 is groove, the groove is provided with the hardometer for detecting tooth hardness, described Groove is consistent with the hardness of tooth 2.

The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (6)

1. a kind of unidirectional heavy-duty gear structure, including gear (1), (2) with teeth and tooth socket is arranged in the gear (1) (3), it is characterised in that: the tooth (2) is made of quenching layer (4) and supporting layer (5), and the thickness of the supporting layer (5), which is greater than, to be quenched The thickness of fire bed (4), the quenching layer (4) include hardened layer (401) and high hard surface layer (402), the hardened layer (401) Thickness is greater than the thickness of high hard surface layer (402), and the hardness of the high hard surface layer (402) is sharp to supporting layer (5) in gradual change type Subtract, the setting of the thickness of the high hard surface layer (402) is in 0.1-1.3mm, and the hardness of the hardened layer (401) is in gradual change type to branch Support layer (5) falls sharply, and the deflection of the hardened layer (401) is no more than the overall thickness of quenching layer (4), the hardened layer (401) Thickness accounts for the 70%-95% of quenching layer (4) thickness, and the relational expression of the depth of quenching of tooth (2) is the depth of quenching=hardened layer (401) Thickness+high hard surface layer (402) thickness, the gear (1) is provided with label (7), the label (7) and tooth (2) Rotationally clockwise direction/counter clockwise direction is consistent, label (7) structure and quenching layer (4) unanimously, the hardening including inside Layer and external high hard surface layer.

2. a kind of unidirectional heavy-duty gear structure according to claim 1, it is characterised in that: the thickness of the supporting layer (5) Greater than 2-5 times of quenching layer (4).

3. a kind of unidirectional heavy-duty gear structure according to claim 1, it is characterised in that: the gear (1) by 20CrMnTi or 40CrMnTi are made.

4. a kind of unidirectional heavy-duty gear structure according to claim 1, it is characterised in that: set on the gear (1) It is equipped with locating slot (6).

5. a kind of unidirectional heavy-duty gear structure according to claim 1, it is characterised in that: the tooth (2) is quenched by unilateral side Quenching layer (4) and supporting layer (5) corresponding thickness is reached in fire or non-uniform hardening.

6. a kind of unidirectional heavy-duty gear structure according to claim 1, it is characterised in that: the label (7) is groove, The groove is provided with the hardometer for detecting tooth hardness, and the groove is consistent with the hardness of tooth (2).