CN209943471U

CN209943471U - Driving gear

Info

Publication number: CN209943471U
Application number: CN201920802128.8U
Authority: CN
Inventors: 蔡斌标
Original assignee: TAIZHOU FUTE TRANSMISSION MACHINERY Co Ltd
Current assignee: Zhongchuan Technology Zhejiang Co ltd
Priority date: 2019-05-30
Filing date: 2019-05-30
Publication date: 2020-01-14
Anticipated expiration: 2029-05-30

Abstract

The utility model provides a drive gear belongs to auto-parts technical field. It has solved the current not good scheduling problem of drive gear bearing capacity. This drive gear includes the body, the body has the through-hole that the axial link up, the outer peripheral face of body has the round external tooth, the body has the extension portion one of axial extension in one side of external tooth, the body has the extension portion two of axial extension in the opposite side of external tooth, the axial length of extension portion two is greater than the axial length of extension portion one, the inner wall of extension portion two has the internal spline, the outer peripheral face of extension portion one has the round and combines the tooth, the guide structure who conveniently combines the awl tooth card to go into has on combining the tooth, this internal bearing that supports in the through-hole inner wall department that the external tooth corresponds, be equipped with the lubricating structure of the lubricating oil circulation of being convenient. The utility model has the advantages of good bearing capacity, convenient combination of bevel gear meshing and good lubricating effect.

Description

Driving gear

Technical Field

The utility model belongs to the technical field of auto-parts, a motor transmission accessory, in particular to drive gear is related to.

Background

The gearbox consists of gears and a shaft, and variable speed and variable distance are generated by different gear combinations to meet the transmission requirement. The existing driving gear is connected with a shaft through a key block, so that the connection is not tight, and the problems of vibration and noise exist.

In view of the above-mentioned problems, a drive gear has been devised and a patent application [ application No.: 201320473269.2, respectively; authorization notice number: CN203413085U ], which comprises a gear body, wherein the outer peripheral surface of the gear body is provided with outer teeth, the gear body is internally provided with inner teeth and convex teeth, the tooth direction of the inner teeth faces the inside of the gear body and is located at the inner end part of the gear body, the tooth direction of the convex teeth faces the outside of the gear body and is located at the inner middle end part of the gear body, steps are arranged between the inner teeth and the convex teeth, and certain gaps are arranged between the inner teeth and the steps.

Foretell drive gear passes through the internal tooth and closely cooperates with the transmission shaft, can improve job stabilization nature and noise reduction's production, but the internal tooth sets up between two parties, gear body middle part inner wall bears the load, including gear body middle part outer wall still bearing the load of external tooth, consequently gear body middle part position uses one section back, can take place to produce certain deformation volume, influence transmission effect, the meshing of the awl tooth is not convenient for combine in the setting of internal tooth, lubricated effect is also not ideal enough, wearing and tearing are big, short service life.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide a bearing capacity is good, be convenient for combine the awl tooth meshing and lubricated effectual drive gear.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a drive gear, includes the body, the body through-hole that has an axial through, the outer peripheral face of body the round external tooth has the extension portion one of axial extension, the body has the extension portion two of axial extension in one side of external tooth, the body the opposite side of external tooth has the extension portion two of axial extension, the axial length of extension portion two be greater than the axial length of extension portion one, a serial communication port, the inner wall of extension portion two internal spline has, the outer peripheral face of extension portion one round combination tooth has, the combination tooth on have the guide structure who conveniently combines the awl tooth card to go into, this internal bearing that is equipped with in the through-hole inner wall department that the external tooth corresponds, the body on be equipped with the lubricating structure of the lubricating oil circulation of being convenient for.

The inner spline and the outer tooth in the driving gear are staggered, the load is dispersed, the bearing capacity is improved, and the bearing capacity of the inner wall of the through hole corresponding to the outer tooth is increased by the bearing, so that the driving gear is good in bearing capacity, the body and the transmission shaft are tightly combined by matching the inner spline with the bearing, the transmission is stable and noiseless; the combination teeth are arranged on the outer peripheral surface of the extension part, so that interference is avoided, the guide structure is convenient for the combination bevel teeth to be clamped into the combination teeth, the meshing process of the combination teeth and the combination bevel teeth is smooth, and the work is stable; lubricating structure makes the lubricated effectual of body, and reducing wear has prolonged life.

In the above-mentioned drive gear, the guide structure includes guide surfaces provided on both edges of the outer end of the coupling tooth, and the guide surfaces are inclined surfaces or arc surfaces.

In one of the above-mentioned drive gears, the guide structure comprises a chamfer provided in combination with a top edge of the outer end of the tooth.

In the above driving gear, the outer end of the second extending part has a convex ring extending axially and arranged coaxially with the second extending part, and the internal spline extends to the inner wall of the convex ring.

In the above-mentioned drive gear, the lubricating structure include that the protruding circle outer end face has a plurality of lubricated grooves, the inboard of lubricated groove communicate in the inner wall of protruding circle, the outside of lubricated groove communicates in the outer wall of protruding circle.

In foretell a drive gear, the external tooth have round axial bulge and the fender shoulder that fuses with the body towards the root of extension both sides, internal spline and bearing between be equipped with the step that supplies the bearing to contradict, lubricating structure include a plurality of circumference equipartition and radially run through the lubrication hole that keeps off shoulder, step.

In the above-mentioned drive gear, the tops of the external teeth and the tops of the coupling teeth are both flat surfaces. Therefore, the transmission ratio is accurate, and the bearing capacity is good.

In the above-mentioned drive gear, the bearing is a needle bearing. The needle bearing has high load bearing capacity and good supporting effect.

Compared with the prior art, the driving gear has the advantages of good bearing capacity, good working stability, small noise, good guidance quality of the combination teeth, convenience for clamping and meshing the combination bevel teeth, good lubricating effect, small abrasion and long service life.

Drawings

Fig. 1 is a structural sectional view of the present drive gear.

Fig. 2 is a schematic structural side view of the driving gear.

Fig. 3 is a schematic view of the structure of one engaging tooth in the present drive gear.

In the figure, 1, a body; 2. an outer tooth; 3. a first extending part; 4. a second extension part; 5. an internal spline; 6. a coupling tooth; 61. a guide surface; 62. chamfering; 7. a bearing; 8. a convex ring; 9. a lubrication groove; 10. a shoulder block; 11. a step; 12. a lubrication hole; 13. and (4) a plane.

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, this drive gear includes body 1, body 1 has the through-hole that the axial is link up, body 1's outer peripheral face has round external tooth 2, body 1 has the extension portion one 3 of axial extension in one side of external tooth 2, body 1 has the extension portion two 4 of axial extension in the opposite side of external tooth 2, the axial length of extension portion two 4 is greater than the axial length of extension portion one 3, the inner wall of extension portion two 4 has internal spline 5, the outer peripheral face of extension portion one 3 has round combination tooth 6, the guide structure who conveniently combines the awl tooth card to go into has on the combination tooth 6, be equipped with the bearing 7 that supports in the through-hole inner wall department that external tooth 2 corresponds in body 1, be equipped with the lubricating structure of the lubricating oil circulation of being convenient for on body 1.

In more detail, as shown in fig. 1, 2 and 3, the guiding structure includes guiding surfaces 61 provided at two edges of the outer end of the coupling tooth 6, in this embodiment, the guiding surfaces 61 are inclined surfaces, the guiding surfaces 61 can also be arc surfaces during actual manufacturing, and the guiding surfaces 61 play a guiding role, so that the coupling tooth can conveniently slide into the coupling tooth 6 to be engaged; the guide structure also comprises a chamfer 62 arranged on the top edge of the outer end of the combination tooth 6, the chamfer 62 avoids interference and also plays a role in guiding, and the combination bevel tooth is convenient to slide into the combination tooth 6 for meshing.

The outer end part of the second extension part 4 is provided with a convex ring 8 which extends axially and is coaxially arranged with the second extension part 4, the internal spline 5 extends to the inner wall of the convex ring 8, the arrangement of the convex ring 8 increases the axial length of the internal spline 5, the contact area between the internal spline 5 and a transmission shaft is increased, the bearing capacity is increased, the tightness of combination of the two is improved, and the work is stable; in order to have good bearing capacity, the tops of the external teeth 2 and the tops of the combined teeth 6 are both flat surfaces 13, and the bearings 7 are needle roller bearings.

The lubricating structure comprises four lubricating grooves 9 arranged on the outer end face of the convex ring 8, the inner sides of the lubricating grooves 9 are communicated with the inner wall of the convex ring 8, the outer sides of the lubricating grooves 9 are communicated with the outer wall of the convex ring 8, and lubricating oil can enter the meshing part of the internal spline 5 and the transmission shaft through the lubricating grooves 9, so that abrasion is reduced, and the service life is prolonged; the root of 2 sides of external tooth towards extension portion two 4 has round axial bulge and links into an organic whole with body 1 and keeps off shoulder 10, be equipped with the step 11 that supplies bearing 7 to contradict between internal spline 5 and the bearing 7, lubricating structure includes four circumference equipartitions and radially runs through and keeps off shoulder 10, the lubrication hole 12 of step 11, after the installation, the outer peripheral face cover of extension portion two 4 is equipped with the bearing, keep off and support the bearing that supplies extension portion two 4 on and lean on, lubrication hole 12 is convenient for the circulation of lubricating oil, lubricating oil can lubricate bearing on extension portion two 4 and the bearing 7 that is located body 1, reduce wear, the life of two bearings has been prolonged, and the heat that two bearings gived off can be taken away to the lubricating oil of circulation, guarantee the long-time normal work of bearing.

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 driving gear comprises a body (1), wherein the body (1) is provided with an axially through hole, the peripheral surface of the body (1) is provided with a circle of external teeth (2), the body (1) is provided with a first axially extending part (3) on one side of the external teeth (2), the body (1) is provided with a second axially extending part (4) on the other side of the external teeth (2), the axial length of the second extending part (4) is greater than that of the first extending part (3), the driving gear is characterized in that the inner wall of the second extending part (4) is provided with an internal spline (5), the peripheral surface of the first extending part (3) is provided with a circle of combining teeth (6), the combining teeth (6) are provided with a guide structure convenient for the combination of conical teeth to be clamped in, and the body (1) is internally provided with a bearing (7) supported on the inner wall of the through hole corresponding to the external teeth (2), the body (1) is provided with a lubricating structure convenient for the circulation of lubricating oil.

2. The drive gear according to claim 1, wherein the guide structure comprises guide surfaces (61) provided at both edges of the outer end of the coupling teeth (6), and the guide surfaces (61) are inclined surfaces or arc surfaces.

3. A drive gear according to claim 2 characterised in that the guide formation comprises a chamfer (62) at the top edge of the outer end of the coupling tooth (6).

4. A drive gear according to claim 1, 2 or 3 characterised in that the outer end of the second extension (4) has a collar (8) extending axially and coaxially with the second extension (4), the internal splines (5) extending to the inner wall of the collar (8).

5. A drive gear according to claim 4 characterised in that the lubricating structure comprises a plurality of lubricating grooves (9) on the outer end face of the collar (8), the inner sides of the lubricating grooves (9) communicating with the inner wall of the collar (8), and the outer sides of the lubricating grooves (9) communicating with the outer wall of the collar (8).

6. A drive gear according to claim 5 characterized in that the root of the external teeth (2) towards the second extension part (4) side has a ring of axially protruding retaining shoulder (10) which is connected with the body (1) into a whole, a step (11) for the bearing (7) to abut against is arranged between the internal spline (5) and the bearing (7), and the lubricating structure comprises a plurality of lubricating holes (12) which are circumferentially uniformly distributed and radially penetrate through the retaining shoulder (10) and the step (11).

7. A drive gear according to claim 6 characterised in that the tops of the external teeth (2) and the tops of the coupling teeth (6) are flat surfaces (13).

8. A drive gear according to claim 7 characterised in that the bearings (7) are needle bearings.