CN211778848U

CN211778848U - Bevel gear

Info

Publication number: CN211778848U
Application number: CN202020362970.7U
Authority: CN
Inventors: 詹加旺
Original assignee: Zhejiang Zhenhua Precision Forging Gear Co ltd
Current assignee: Zhejiang Zhenhua Precision Forging Gear Co ltd
Priority date: 2020-03-20
Filing date: 2020-03-20
Publication date: 2020-10-27
Anticipated expiration: 2030-03-20

Abstract

The utility model provides a bevel gear belongs to gear manufacturing technical field. It has solved the problem of the meshing wearing and tearing of gear body in the current bevel gear. This bevel gear is including the gear body that has the shaft hole, be equipped with the foreign gear tooth that inclines in gear body axis direction on the gear body, the foreign gear tooth includes the addendum, the left flank of tooth, right flank of tooth and tooth root, left flank of tooth and gear body formation pressure angle are greater than right flank of tooth and gear body formation pressure angle, wherein be provided with on the gear body in two radial relative external teeth of tooth through the gear body effect of the centrifugal force that produces when rotatory from the addendum of two external teeth of tooth that correspond and go out the lubricated left flank of tooth, the logical oily device of right flank of tooth. The utility model has reasonable and simple structure design and small abrasion, and prevents the engagement from jumping radially; the installation is convenient, the service life is long, the working stability is good, and the vibration can be avoided.

Description

Bevel gear

Technical Field

The utility model belongs to the technical field of the gear manufacturing, a bevel gear is related to.

Background

The bevel gear is an important component forming the automobile differential, and has the structure that the bevel gear faces outwards, a spline shaft hole is arranged in the center, and a gasket is arranged between the differential shell and the side gear in order to reduce abrasion.

When the bevel gear is used, the bevel gear is in direct contact with the gasket, the bevel gear is easy to rub the gasket when rotating, the gap between teeth is increased due to the abrasion and thinning of the gasket, the abrasion powder causes the edge difference of grease, the abrasion of abrasive particles on the tooth surface is caused, and the gear can be beaten when the abrasion is serious.

The oil groove is add to the binding face of current bevel gear and gasket, and this oil groove all is straight groove and circular arc groove, though can guarantee certain lubricity, nevertheless because the contact oil level is little, the oil groove oil storage capacity is few, and bevel gear is at high speed, the high operating mode during operation that bears, and the not enough condition of lubrication probably appears, leads to gasket ablation or wearing and tearing serious, and the root of tooth stress concentration of outer gear in addition, the rigidity is weak, and bearing capacity is weak, and compressive strength is low, easily appears disconnected tooth phenomenon.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide a simple structure, when the wheeler tooth meshing, can automatic extrusion fluid, guarantee fully lubricated bevel gear.

The purpose of the utility model can be realized by the following technical proposal: the bevel gear is characterized in that oil passing devices for leading oil to be discharged from tooth tops of two corresponding outer gear teeth to lubricate the left side tooth surface and the right side tooth surface under the action of centrifugal force generated by the rotation of the gear body are arranged on the gear body in two radially opposite outer gear teeth.

This bevel gear main shaft is provided with logical oily device on the gear body in two outer teeth of a cogwheel, makes outer teeth lubricated through leading to oily device, and this logical oily device is by the automatic oil feed of the effect of the centrifugal force that produces when the gear body is rotatory, can effectively avoid appearing lubricated not enough, leads to the pad to ablate or the serious condition of wearing and tearing.

In foretell bevel gear, the inner wall in shaft hole of gear body have and be radial two oil grooves that lead to that set up, two oil grooves lead to and be radial relative symmetric distribution in gear body, the tank bottom of two oil grooves all is provided with the oil through hole that corresponds the intercommunication with the tooth top of two radial relative outer teeth of a cogwheel respectively. The purpose that sets up like this makes the direct tooth top that communicates to the outer teeth of a cogwheel of the fluid of logical oil groove, and it is lubricated to adjacent outer teeth of a cogwheel by the tooth top of the outer teeth of a cogwheel of wherein two, and it is lubricated even, lubricated effect is better.

In the bevel gear, the oil passing device comprises a cylindrical piston correspondingly arranged in an oil passing groove, the cylindrical piston slides in the oil passing groove and divides the oil passing groove into a pushing cavity and a resetting cavity, the pushing cavity is communicated with the corresponding oil passing hole and is filled with oil for lubrication, a compression spring which elastically acts on the cylindrical piston is arranged in the pushing cavity, one end of the compression spring elastically abuts against the cavity bottom of the pushing cavity, the other end of the compression spring elastically abuts against the cylindrical piston, when the gear body rotates in the circumferential direction, the centrifugal force is generated, the cylindrical piston is driven to radially displace in the oil passing groove to overcome the elastic force of the compression spring, the oil in the pushing cavity and the corresponding oil passing hole is pushed out for lubrication, when the gear body stops rotating in the circumferential direction and loses the effect of the centrifugal force generated when the gear body rotates, when the elasticity of the compression spring is abutted to enable the columnar piston to reset in the oil through groove, the pushing cavity and the corresponding oil through hole are in a negative pressure state to stop oil outlet. The radial displacement of the cylindrical piston in the oil through groove is determined by the action of centrifugal force generated when the gear body rotates in the circumferential direction, and the oil through effect is good.

In the bevel gear, the notch of the oil through groove is also provided with a circular block for preventing the columnar piston from separating from the oil through groove, and a connecting structure for enabling the circular block to be fixedly connected with the notch of the oil through groove of the gear body is arranged between the circular block and the gear body. The purpose that sets up like this is through the shutoff of circular sprue, can effectively avoid the column piston to break away from logical oil groove.

In the bevel gear, the connecting structure comprises an elastic ring in an open shape, a first annular groove is formed in the wall of the groove opening of the oil through groove of the gear body, the elastic ring is located in the first annular groove, a second annular groove is formed in the outer cylindrical surface of the circular block, and when the circular block is located at the groove opening of the oil through groove of the gear body, the elastic ring is clamped between the first annular groove and the second annular groove to enable the circular block to be fixedly connected with the gear body. The round block is conveniently clamped and mounted on the groove opening wall of the oil through groove of the gear body; there is the circumference interval at head end and end in the elastic ring, and this elastic ring carries out the deformation assembly, convenient assembling through the circumference interval between head end, the end.

In foretell bevel gear, the outer wall of circular sprue be the arc surface, the radian of the outer wall of circular sprue the same setting with the radian in shaft hole of gear body, when circular sprue was in the notch department of the logical oil groove of gear body, the outer wall of this circular sprue flushed with the shaft hole inner wall of gear body.

In a aforesaid bevel gear, the outer wall of columnar piston on be provided with the annular seal groove, the annular seal groove in be provided with the sealing washer, when the columnar piston was in logical oil groove, this sealing washer elastic action was on the cell wall of logical oil groove. The purpose of setting up like this can prevent effectively that the fluid that promotes in chamber and the oil through hole that corresponds from leaking to the chamber that resets, can guarantee to promote the chamber and reset the chamber sealed validity of being separated by.

Compared with the prior art, the bevel gear has the advantages that: structural design is reasonable, simple, promotes the chamber and just packs with the logical oilhole intercommunication that corresponds and have the fluid that is used for the lubrication, and the oil reserve is big, and extrusion through the column piston produces oil, and it is lubricated effectual to produce oil, and wearing and tearing are little, long service life, and meshing transmission stability is good, and the noise is little.

Drawings

Fig. 1 is a schematic sectional view of the present bevel gear.

Fig. 2 is a schematic perspective view of a single external gear tooth in the present bevel gear.

FIG. 3 is a schematic cross-sectional structural view of a circular block in the present bevel gear.

Fig. 4 is a front view structure schematic diagram of the elastic ring in the bevel gear.

In the figure, 1, shaft hole; 2. a gear body; 2a, a first annular groove; 3. outer gear teeth; 4. tooth top; 5. a left flank surface; 6. a right flank surface; 7. a tooth root; 8. an oil groove is communicated; 9. an oil through hole; 10. a cylindrical piston; 11. a compression spring; 12. a circular block; 12a and a second annular groove; 13. an elastic ring; 14. and (5) sealing rings.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, the bevel gear mainly comprises a gear body 2 with a shaft hole 1, outer gear teeth 3 inclined to the axial direction of the gear body 2 are arranged on the gear body 2, a tooth space is formed between two adjacent outer gear teeth 3, each outer gear tooth 3 comprises an addendum 4, a left tooth surface 5, a right tooth surface 6 and a tooth root 7, a pressure angle formed by the left tooth surface 5 and the gear body 2 is larger than that formed by the right tooth surface 6 and the gear body 2, when the bevel gear works, the left tooth surface 5 with a large pressure angle is taken as a meshing side, the right tooth surface 6 with a small pressure angle is taken as a non-meshing side, and oil passing devices for lubricating the left tooth surface 5 and the right tooth surface 6 by oil from the addendum 4 of the corresponding two outer gear teeth 3 under the action of centrifugal force generated when the gear body 2 rotates are arranged on the gear bodies 2 in the.

Specifically speaking: the inner wall of the shaft hole 1 of the gear body 2 is provided with two oil through grooves 8 which are radially arranged, the two oil through grooves 8 are radially and symmetrically distributed in the gear body 2 in a relative mode, and oil through holes 9 which are respectively communicated with the tooth tops 4 of two outer gear teeth 3 which are radially opposite are formed in the groove bottoms of the two oil through grooves 8; in actual manufacturing, the specific implementation mode of the oil passing device is as follows: the oil lubrication device mainly comprises a cylindrical piston 10 correspondingly arranged in an oil through groove 8, wherein the cylindrical piston 10 is positioned in the oil through groove 8 in a sliding mode and divides the oil through groove 8 into a pushing cavity and a resetting cavity, the pushing cavity is communicated with a corresponding oil through hole 9 and is filled with oil for lubrication, a compression spring 11 which has elastic action on the cylindrical piston 10 is arranged in the pushing cavity, one end of the compression spring 11 is elastically abutted against the bottom of the pushing cavity, the other end of the compression spring 11 is elastically abutted against the cylindrical piston 10, when the cylindrical piston 10 is driven to move in the oil through groove 8 in the radial direction under the action of centrifugal force generated when the gear body 2 rotates in the circumferential direction and overcomes the elastic force of the compression spring 11, the oil in the pushing cavity and the corresponding oil through hole 9 is pushed out for oil lubrication, when the gear body 2 stops rotating in the circumferential direction and loses the action of the centrifugal force generated when the gear body 2 rotates, and the elastic force of the compression spring, the pushing cavity and the corresponding oil through hole 9 are in a negative pressure state to stop oil outlet; in practical design, an annular sealing groove is formed in the outer wall of the cylindrical piston 10, a sealing ring 14 is arranged in the annular sealing groove, and when the cylindrical piston 10 is located in the oil through groove 8, the sealing ring 14 elastically acts on the wall of the oil through groove 8. This arrangement ensures the effectiveness of the sealing of the push and reset chambers.

During actual manufacturing, as shown in fig. 3, a circular block 12 for preventing the cylindrical piston 10 from being separated from the oil through groove 8 is further disposed at the groove opening of the oil through groove 8, and a connection structure for enabling the circular block 12 to be fixedly connected at the groove opening of the oil through groove 8 of the gear body 2 is disposed between the circular block 12 and the gear body 2. As shown in fig. 4, in the actual design, the specific implementation of the connection structure is as follows: the gear oil-passing groove is mainly composed of an open elastic ring 13, a first annular groove 2a is formed in the groove opening wall of an oil-passing groove 8 of a gear body 2, the elastic ring 13 is located in the first annular groove 2a, a second annular groove 12a is formed in the outer cylindrical surface of a circular block 12, and when the circular block 12 is located at the groove opening of the oil-passing groove 8 of the gear body 2, the elastic ring 13 is clamped between the first annular groove 2a and the second annular groove 12a to enable the circular block 12 to be fixedly connected with the gear body 2; specifically speaking: the outer wall of this circular sprue 12 is the arc surface, and the radian of the outer wall of circular sprue 12 is the same with the radian of the shaft hole 1 of gear body 2 and sets up, and when circular sprue 12 was in the notch department of the logical oil groove 8 of gear body 2, the outer wall of this circular sprue 12 flushed with 1 inner wall in shaft hole of gear body 2.

Those not described in detail in this specification are within the skill of the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A bevel gear comprises a gear body (2) with a shaft hole (1), wherein outer gear teeth (3) inclined to the axis direction of the gear body (2) are arranged on the gear body (2), a tooth space is formed between every two adjacent outer gear teeth (3), each outer gear tooth (3) comprises a tooth crest (4), a left tooth flank (5), a right tooth flank (6) and a tooth root (7), a pressure angle formed by the left tooth flank (5) and the gear body (2) is larger than a pressure angle formed by the right tooth flank (6) and the gear body (2), when the bevel gear works, the left tooth flank (5) with a large pressure angle is taken as a meshing side, and the right tooth flank (6) with a small pressure angle is taken as a non-meshing side, and the bevel gear is characterized in that the gear body (2) in the two radially opposite outer gear teeth (3) is provided with oil discharged from the tooth crests (4) of the two corresponding outer gear teeth (3) under the effect of centrifugal force generated when the gear body (2) rotates to lubricate the left tooth And an oil passing device of the right side tooth surface (6).

2. The bevel gear according to claim 1, wherein the inner wall of the shaft hole (1) of the gear body (2) is provided with two oil through grooves (8) which are radially arranged, the two oil through grooves (8) are radially and symmetrically distributed in the gear body (2), and oil through holes (9) which are respectively communicated with the tooth tops (4) of the two radially opposite external gear teeth (3) are respectively formed in the groove bottoms of the two oil through grooves (8).

3. The bevel gear according to claim 2, wherein the oil passing device comprises a cylindrical piston (10) correspondingly disposed in the oil passing groove (8), the cylindrical piston (10) is slidably disposed in the oil passing groove (8) and divides the oil passing groove (8) into a pushing chamber and a returning chamber, the pushing chamber is communicated with the corresponding oil passing hole (9) and is filled with oil for lubrication, a compression spring (11) elastically acting on the cylindrical piston (10) is disposed in the pushing chamber, one end of the compression spring (11) elastically abuts against the bottom of the pushing chamber, the other end of the compression spring (11) elastically abuts against the cylindrical piston (10), and when centrifugal force generated when the gear body (2) rotates circumferentially drives the cylindrical piston (10) to move radially in the oil passing groove (8) and overcome the elastic force of the compression spring (11), the oil liquid in the pushing cavity and the corresponding oil through hole (9) is pushed out for oil lubrication, when the gear body (2) stops rotating in the circumferential direction and loses the effect of centrifugal force generated when the gear body (2) rotates, the elastic force of the compression spring (11) abuts against the columnar piston (10) to reset in the oil through groove (8), and the pushing cavity and the corresponding oil through hole (9) are in a negative pressure state to stop oil outlet.

4. The bevel gear according to claim 3 wherein a circular block (12) for preventing the cylindrical piston (10) from separating from the oil channel (8) is further disposed at the notch of the oil channel (8), and a connection structure for fixedly connecting the circular block (12) to the notch of the oil channel (8) of the gear body (2) is disposed between the circular block (12) and the gear body (2).

5. The bevel gear according to claim 4, wherein the connecting structure comprises an open elastic ring (13), a first annular groove (2 a) is formed in a groove opening wall of the oil through groove (8) of the gear body (2), the elastic ring (13) is located in the first annular groove (2 a), a second annular groove (12 a) is formed in an outer cylindrical surface of the circular block (12), and when the circular block (12) is located at a groove opening of the oil through groove (8) of the gear body (2), the elastic ring (13) is clamped between the first annular groove (2 a) and the second annular groove (12 a) to fixedly connect the circular block (12) and the gear body (2).

6. The bevel gear according to claim 5 characterized in that the outer wall of the circular block (12) is a circular arc surface, the radian of the outer wall of the circular block (12) is the same as the radian of the shaft hole (1) of the gear body (2), and when the circular block (12) is positioned at the notch of the oil through groove (8) of the gear body (2), the outer wall of the circular block (12) is flush with the inner wall of the shaft hole (1) of the gear body (2).

7. Bevel gear according to claim 6, characterized in that the outer wall of the cylindrical piston (10) is provided with an annular sealing groove, in which a sealing ring (14) is arranged, which sealing ring (14) elastically acts on the wall of the oil through groove (8) when the cylindrical piston (10) is in the oil through groove (8).