CN213899813U - Gear box - Google Patents

Abstract

The utility model discloses a gearbox, the one end that the input shaft was kept away from to the main shaft is passed through the bearing and is supported fixedly, and the one end that the input shaft is close to the main shaft is equipped with the hole, and the one end that the main shaft is close to the input shaft is equipped with the cartridge in the projection of hole, has the clearance between projection and the hole, and the outer wall of projection and/or the inner wall of hole are equipped with wear-resisting cover. The wear-resistant sleeve is arranged at the contact end of the main shaft and/or the input shaft, namely the convex column of the main shaft and/or the inner hole of the input shaft, so that the main shaft and the input shaft which are made of the same material are prevented from being directly contacted and worn. In addition, the wear-resistant sleeve can be detached, so that once the wear-resistant sleeve is seriously worn, the wear-resistant sleeve can be detached and replaced by a new wear-resistant sleeve, the service life of each part is protected, and the service life of the whole gearbox is prolonged.

Description

Gear box

Technical Field

The utility model relates to a heavy truck technical field, more specifically say, relate to a gearbox.

Background

One technical direction of current heavy truck gearboxes is a double-intermediate shaft structure. The main shaft gear has no needle bearing, and the gear is not directly contacted with the main shaft, and when the structure works, the gear on the two intermediate shafts is radially meshed with the gear on the main shaft to run, so that the self position is self-adaptively adjusted to achieve the optimal transmission effect.

In the structure, the tail end of the main shaft is fixedly supported through the bearing, the bearing is used as a fulcrum of the main shaft, and the front end of the main shaft has certain floating. The main shaft is very long, so that the inner hole of the input shaft is required to support the front end of the main shaft in an auxiliary mode, however, when the floating amount of the front end of the main shaft is too large in the using process, the front end of the main shaft is in direct contact with the input shaft, rapid abrasion is generated, parts are damaged, and the service life is influenced.

Therefore, how to solve the problem of part damage caused by friction between the main shaft and the input shaft is a problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a gearbox has avoided the direct wearing and tearing of main shaft and input shaft, improves life.

In order to achieve the above object, the present invention provides the following technical solutions:

the utility model provides a gearbox, including the input shaft, with input shaft drive complex jackshaft and with jackshaft drive complex main shaft, the main shaft is kept away from the one end of input shaft is passed through the bearing and is supported fixedly, the input shaft is close to the one end of main shaft is equipped with the hole, the main shaft is close to the one end of input shaft be equipped with the cartridge in the projection of hole, the projection with have the clearance between the hole, the outer wall of projection and/or the inner wall of hole is equipped with wear-resisting cover.

Preferably, the outer wall of projection is equipped with first wear-resisting cover, just the outer wall of first wear-resisting cover is the cambered surface of evagination.

Preferably, the inner wall of the inner hole is provided with a second wear-resistant sleeve, and the outer wall of the second wear-resistant sleeve is an arc surface which is inwards concave and matched with the second wear-resistant sleeve.

Preferably, the inner hole is provided with a stepped hole for mounting the wear-resistant sleeve.

Preferably, a stepped shaft for mounting the wear-resistant sleeve is arranged on the convex column.

Preferably, the first wear-resistant sleeve and the second wear-resistant sleeve are both copper alloy sleeves.

The utility model provides a gearbox sets up wear-resisting cover through the contact jaw at main shaft and/or input shaft, sets up wear-resisting cover at the projection of main shaft and/or the hole of input shaft promptly to can avoid the main shaft and the input shaft direct contact wearing and tearing of the same material, because wear resistance of wear-resisting cover is fine, can effectively prevent the direct wearing and tearing of input shaft and main shaft, can guarantee the restriction to the floating volume of main shaft simultaneously. In addition, the wear-resistant sleeve can be detached, so that once the wear-resistant sleeve is seriously worn, the wear-resistant sleeve can be detached and replaced by a new wear-resistant sleeve, the service life of each part is protected, and the service life of the whole gearbox is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is an assembly schematic diagram of an input shaft, an intermediate shaft and a main shaft of a transmission provided by the present invention;

fig. 2 is an enlarged schematic view of a portion a of fig. 1.

Wherein, 1-input shaft, 11-inner hole, 2-wear-resistant sleeve, 3-main shaft, 31-convex column, 4-intermediate shaft and 5-bearing.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The core of the utility model is to provide a gearbox, avoided the direct wearing and tearing of main shaft and input shaft, improve life.

Referring to fig. 1 to 2, fig. 1 is an assembly schematic diagram of an input shaft, an intermediate shaft and a main shaft of a transmission according to the present invention; fig. 2 is an enlarged schematic view of a portion a of fig. 1.

The utility model provides a gearbox, including input shaft 1, with 1 transmission complex jackshaft 4 of input shaft, and with 4 transmission complex main shafts 3 of jackshaft, the one end that input shaft 1 was kept away from to main shaft 3 is passed through bearing 5 and is supported fixedly, the one end that input shaft 1 is close to main shaft 3 is equipped with hole 11, the one end that main shaft 3 is close to input shaft 1 is equipped with the cartridge in hole 11's projection 31, the clearance has between projection 31 and the hole 11, the outer wall of projection 31 and/or hole 11's inner wall are equipped with wear-resisting cover 2.

The input shaft 1 is a shaft for power to enter the gearbox, the power enters the gearbox from the engine through the input shaft 1, and the input shaft 1 drives an input gear on the shaft to transmit the power to an output gear to drive an output shaft to rotate.

The intermediate shaft 4 is a shaft in the gearbox, the intermediate shaft 4 and the gear are integrated, the intermediate shaft 4 is used for connecting the input shaft 1 and the main shaft 3, and the main shaft 3 can output different rotating speeds, steering directions and torques by selecting to be meshed with different gears through the transformation of a gear shift lever.

The main shaft 3 is a shaft in an automobile gearbox, and the main shaft 3 is used for selecting to be meshed with different gears through the transformation of a gear shift lever, directly transmitting the rotating speed, the steering direction and the torque transmitted by the intermediate shaft 4 to a transmission shaft, and then driving an automobile through a differential.

When the gearbox works, firstly, the input shaft 1 transmits torque and rotating speed transmitted by an engine to the intermediate shaft 4, and the torque and the rotating speed are selected to be meshed with different gears through the conversion of a gear shift lever, so that the torque and the rotating speed are transmitted to the main shaft 3, and the main shaft 3 only has one supporting point of the bearing 5 when working, so that the convex column 31 at the front end of the main shaft 3 can be contacted with the inner hole 11 of the input shaft 1 due to swinging and rotating motion.

Because the convex column 31 and/or the inner hole 11 are/is provided with the wear-resistant sleeve 2, the wear-resistant sleeve 2 is arranged on the convex column 31 or the inner hole 11 in an interference fit manner, the wear-resistant performance of the wear-resistant sleeve 2 is good and is different from the materials of the main shaft 3 and the input shaft 1, the direct wear of the input shaft 1 and the main shaft 3 can be effectively prevented, and the limitation on the floating amount of the main shaft 3 can be ensured. In addition, because the wear-resisting sleeve 2 can be disassembled, once the wear-resisting sleeve 2 is seriously worn, the wear-resisting sleeve 2 can be disassembled and replaced by a new wear-resisting sleeve 2, thereby protecting the service life of each part and prolonging the service life of the whole gearbox.

The utility model provides a gearbox, contact jaw through at main shaft 3 and/or input shaft 1 sets up wear-resisting cover 2, projection 31 at main shaft 3 and/or the hole 11 of input shaft 1 set up wear-resisting cover 2 promptly, thereby can avoid the main shaft 3 and the 1 direct contact wearing and tearing of input shaft of the same material, because wear-resisting property of wear-resisting cover 2 is fine, and different with the material of main shaft 3 and input shaft 1, it is softer relatively, input shaft 1 and 3 direct wearing and tearing can effectively be prevented, can guarantee the restriction to the floating volume of main shaft 3 simultaneously. In addition, because the wear-resisting sleeve 2 can be disassembled, once the wear-resisting sleeve 2 is seriously worn, the wear-resisting sleeve 2 can be disassembled and replaced by a new wear-resisting sleeve 2, thereby protecting the service life of each part and prolonging the service life of the whole gearbox.

On the basis of the above embodiment, as a preferable option, the outer wall of the convex column 31 is provided with a first wear-resistant sleeve, and the outer wall of the first wear-resistant sleeve is an outward convex arc surface. In this embodiment, the first wear-resistant sleeve is sleeved on the convex column 31 of the main shaft 3, so that the main shaft 3 and the input shaft 1 can be prevented from being directly contacted.

On the basis of the above embodiment, as a preferable option, the inner wall of the inner hole 11 is provided with a second wear-resistant sleeve, and the outer wall of the second wear-resistant sleeve is an arc surface which is concave inwards and matched with the second wear-resistant sleeve. In this embodiment, when the first wear-resistant sleeve is arranged on the convex column 31 of the main shaft 3, the second wear-resistant sleeve is arranged in the inner hole 11 of the input shaft 1, that is, the wear-resistant sleeves 2 are arranged on the input shaft 1 and the main shaft 3 simultaneously, so that the main shaft 3 and the input shaft 1 are completely prevented from being worn, and when the wear of the wear-resistant sleeves 2 is serious, the wear-resistant sleeves 2 can be directly replaced.

On the basis of the above described embodiment, the inner bore 11 is preferably provided with a stepped bore for mounting the wear sleeve 2, taking into account the specific way in which the wear sleeve 2 is mounted on the input shaft 1. Specifically, wear-resisting cover 2 and shoulder hole interference fit, the shoulder hole still can play axial positioning's effect to wear-resisting cover 2, places wear-resisting cover 2 and removes, guarantees that wear-resisting cover 2 is in the contact surface department of main shaft 3 and output shaft.

On the basis of the above-described embodiment, in consideration of the specific manner in which the wear-resistant sleeve 2 is mounted on the main shaft 3, it is preferable that the convex column 31 is provided with a stepped shaft for mounting the wear-resistant sleeve 2. Specifically, wear-resisting cover 2 and step shaft interference fit, the step shaft also can play axial positioning's effect to wear-resisting cover 2, prevents that wear-resisting cover 2 from removing, guarantees that wear-resisting cover 2 is in the contact surface department of main shaft 3 and output shaft.

On the basis of the above embodiments, in consideration of the specific material selection of the first wear-resistant sleeve and the second wear-resistant sleeve, it is preferable that the first wear-resistant sleeve and the second wear-resistant sleeve are both copper alloy sleeves. The copper alloy sleeve is softer than the materials of the input shaft 1 and the main shaft 3 and has wear resistance.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

It is right above the utility model provides a gearbox has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (6)

1. The utility model provides a gearbox, including input shaft (1), with input shaft (1) transmission fit's jackshaft (4) and with jackshaft (4) transmission fit's main shaft (3), its characterized in that, main shaft (3) are kept away from the one end of input shaft (1) is passed through bearing (5) and is supported fixedly, input shaft (1) is close to the one end of main shaft (3) is equipped with hole (11), main shaft (3) are close to the one end of input shaft (1) is equipped with the cartridge in convex column (31) of hole (11), convex column (31) with the clearance has between hole (11), the outer wall of convex column (31) and/or the inner wall of hole (11) is equipped with wear-resisting cover (2).

2. The gearbox according to claim 1, characterized in that the outer wall of the stud (31) is provided with a first wear sleeve, and the outer wall of the first wear sleeve is an outwardly convex arc.

3. The gearbox according to claim 2, characterized in that the inner wall of the inner bore (11) is provided with a second wear sleeve, and the outer wall of the second wear sleeve is an arc surface which is concave inwards and matched with the second wear sleeve.

4. A gearbox according to claim 3, characterised in that the inner bore (11) is provided with a stepped bore for mounting the wear sleeve (2).

5. Gearbox according to claim 4, characterised in that on said stud (31) there is provided a stepped shaft for mounting said wear sleeve (2).

6. A gearbox according to any one of claims 3 to 5, characterised in that the first and second wear sleeves are both copper alloy sleeves.

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