CN207648099U - A kind of transmission mechanism of hybrid gearbox - Google Patents

Abstract

This utility model discloses a transmission mechanism for a hybrid power transmission, including a housing, a first tapered roller bearing, a gear, a second tapered roller bearing, and a rear cover. Both the first and second tapered roller bearings are disposed between the housing and the gear. The outer rings of the first and second tapered roller bearings are fixedly connected to the housing, and their inner rings are fixedly connected to the gear. An adjusting shim is provided between the second tapered roller bearing and the rear cover. A cylinder extends from the housing, and the cylinder has a first oil hole concentric with the cylinder and a second oil hole perpendicular to the first oil hole. This utility model uses tapered roller bearings, which can improve the bearing's service life, reduce gear yaw during operation, and lower noise.

Description

Transmission mechanism of a hybrid transmission

technical field

The utility model relates to the technical field of hybrid transmissions for automobiles, in particular to a transmission mechanism of a hybrid transmission.

Background technique

With the increasing shortage of oil supply and the increasing environmental pollution, the transmission mechanism of hybrid electric vehicle transmission with good fuel economy, low emission, fuel saving rate and power performance has attracted more and more attention.

Most of the transmission mechanisms of the existing hybrid vehicle transmissions use column bearings. Since the column bearings have axial and radial clearances, during operation, the gears are inclined to eliminate the clearances due to the action of the meshing force, resulting in the inner ring and the rollers. Some positions are subject to greater force, specifically, the inner and outer rings (gear inner holes) and rollers near the meshing point are under a large force, while the inner ring is fixed and does not rotate during operation, and the position near the meshing point will be continuously affected Force, stress and sustained action lead to failure, shortening the life of the column bearing. Moreover, due to the error of the gear yaw runout caused by the axial and radial clearance, the gear is not running smoothly and the noise is large.

Therefore, it is necessary to propose a new technical solution.

Utility model content

Aiming at the above-mentioned problems in the prior art, the utility model proposes a transmission mechanism of a hybrid transmission, which can solve the problems of bearing life and gear running noise.

In order to achieve the above object, the technical scheme adopted by the utility model is as follows:

A transmission mechanism of a hybrid transmission, comprising a housing, a first tapered roller bearing, a gear, a second tapered roller bearing and a rear cover, the first tapered roller bearing and the second tapered roller bearing are both Arranged between the housing and the gear, the outer rings of the first tapered roller bearing and the second tapered roller bearing are respectively fixedly connected to the housing, and the first tapered roller bearing and the inner ring of the second tapered roller bearing are respectively fixedly connected with the gear, an adjusting gasket is arranged between the second tapered roller bearing and the rear cover, and a cylinder protrudes from the housing , the cylinder is provided with a first oil hole concentric with the cylinder and a second oil hole perpendicular to the first oil hole.

Further, the first tapered roller bearing and the second tapered roller bearing are arranged symmetrically on both sides of the second oil hole.

Further, the first tapered roller bearing includes a first outer ring, a first inner ring and a first roller.

Further, the second tapered roller bearing includes a second outer ring, a second inner ring and a second roller.

Further, the small end of the first roller is opposite to the second roller.

Further, the big end of the first roller is opposite to the second roller.

Further, the diameter of the first oil hole is larger than the diameter of the second oil hole.

Further, the housing and the rear cover are cast as one, and the rear cover is made of cast steel.

The utility model has the following beneficial effects:

The utility model adopts the first tapered roller bearing and the second tapered roller bearing, and adds an adjusting gasket on the first tapered roller bearing to pre-tighten and eliminate the bearing clearance, and overcomes the situation that the force of the gear is inclined during operation , to ensure that the force is evenly transmitted to the tapered surfaces of the inner and outer rings of the first tapered roller bearing and the second tapered roller bearing and each roller during operation, the number and area of the parts bearing the force are greatly increased, and the local stress is reduced , extending the service life of the first tapered roller bearing and the second tapered roller bearing. At the same time, the gap in the axial direction of the gear is eliminated, which ensures a more stable operation of the gear and improves the noise level of the transmission mechanism.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative work.

Fig. 1 is the structural representation of the transmission mechanism of the hybrid transmission provided by the utility model;

Among them: 1-shell, 2-first tapered roller bearing, 21-first outer ring, 22-first inner ring, 23-first roller, 3-first oil hole, 4-gear, 5- The second tapered roller bearing, 51-the second outer ring, 52-the second inner ring, 53-the second roller, 6-the second oil hole, 7-adjusting gasket, 8-back cover.

Detailed ways

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and not intended to limit the scope of the present invention. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessarily confusing the concept of the present invention.

It should be noted that the terms "first" and "second" in the specification and claims of the present utility model and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific order or sequence . It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, means, product or equipment comprising a series of steps or elements need not be limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

Example 1

During the operation of the existing transmission mechanism, the transmission force of the gear mesh acts on the gear mesh point, and the point of action of the force is the fixed position point of the transmission mechanism. The column bearing used in the prior art has axial and Radial clearance (clearance is the clearance to ensure the operation of the bearing); during operation, under the action of meshing force, the gears are tilted to eliminate the clearance, resulting in greater force on the inner ring and rollers, specifically near the meshing point The inner and outer rings (bore of the gear) and the rollers are heavily stressed. Since the inner ring is fixed and does not rotate during operation, the position close to the meshing point will be subjected to continuous large force, and the stress and continuous action will cause the column bearing to fail.

In view of the above problems, this embodiment provides a transmission mechanism of a hybrid transmission, as shown in Figure 1, including a housing 1, a first tapered roller bearing 2, a gear 4, a second tapered roller bearing 5 and a rear cover 8 , the first tapered roller bearing 2 and the second tapered roller bearing 5 are both arranged between the housing 1 and the gear 4, the first tapered roller bearing 2 includes a first outer ring 21. The first inner ring 22 and the first roller 23. The second tapered roller bearing 5 includes a second outer ring 51, a second inner ring 52 and a second roller 53. The first roller 23 and The small ends of the second rollers 53 are arranged opposite to each other. This installation method can meet the product life requirements, and at the same time reduce the axial arrangement distance, making the product design more miniaturized. The outer rings of the first tapered roller bearing 2 and the second tapered roller bearing 5 are fixedly connected to the housing 1 respectively, and the first tapered roller bearing 2 and the second tapered roller bearing The inner rings of 5 are fixedly connected with the gear 4 respectively, and an adjusting gasket 7 is arranged between the second tapered roller bearing 5 and the rear cover 8 . In this embodiment, the first tapered roller bearing 2 and the second tapered roller bearing 5 are used, and the adjusting gasket 7 is added to the second tapered roller bearing 5 for preloading to eliminate bearing clearance , to overcome the inclination of the force of the gear 4 during operation, to ensure that the force is evenly transmitted to the inner and outer ring tapered surfaces of the first tapered roller bearing 2 and the second tapered roller bearing 5 and On the first roller 23 and the second roller 53, the number and area of the parts bearing the force are greatly increased, the local stress is reduced, and the first tapered roller bearing 2 and the second roller bearing 2 are extended. The service life of tapered roller bearings 5. At the same time, the clearance in the axial direction of the gear 4 is eliminated, ensuring a more stable operation of the gear 4 and improving the noise level of the transmission mechanism.

A cylinder protrudes from the housing 1, and a first oil hole 3 concentric with the cylinder and a second oil hole 6 perpendicular to the first oil hole 3 are opened on the cylinder. The diameter of the oil hole 3 is larger than the diameter of the second oil hole 6, and the first tapered roller bearing 2 and the second tapered roller bearing 5 are arranged symmetrically on both sides of the second oil hole 6, this The embodiment utilizes the first oil hole 3 and the second oil hole 6 to make the working and assembly process of the first inner ring 22 and the second inner ring 52 more stable, and improve the cylinder's impact on the The supporting function of the first tapered roller bearing 2 and the second tapered roller bearing 5 can avoid material removal and extrusion around the first oil hole 3 and the second oil hole 6 during processing and assembly. Flash dust generated during the pressing process affects the cleanliness.

The housing 1 and the rear cover 8 are cast as one. In this embodiment, the rear cover 8 is made of cast steel with high rigidity, which can improve the rigidity of the transmission mechanism and improve the first tapered roller The service life of the bearing 2 and the second tapered roller bearing 5 is improved, and the running noise of the gear 4 is reduced.

Example 2

As shown in Figure 1, this embodiment provides a transmission mechanism of a hybrid transmission, including a housing 1, a first tapered roller bearing 2, a gear 4, a second tapered roller bearing 5 and a rear cover 8, the first A tapered roller bearing 2 and the second tapered roller bearing 5 are both arranged between the housing 1 and the gear 4, and the first tapered roller bearing 2 includes a first outer ring 21, a first The inner ring 22 and the first roller 23, the second tapered roller bearing 5 includes a second outer ring 51, a second inner ring 52 and a second roller 53, the first roller 23 and the second The big ends of the rollers 53 are arranged oppositely, the outer rings of the first tapered roller bearing 2 and the second tapered roller bearing 5 are fixedly connected with the housing 1 respectively, and the first tapered roller bearing 2 The inner ring of the second tapered roller bearing 5 is fixedly connected with the gear 4 respectively, and an adjusting gasket 7 is arranged between the second tapered roller bearing 5 and the rear cover 8 . In this embodiment, the first tapered roller bearing 2 and the second tapered roller bearing 5 are used, and the adjusting gasket 7 is added to the second tapered roller bearing 5 for preloading to eliminate bearing clearance , to overcome the inclination of the force of the gear 4 during operation, to ensure that the force is evenly transmitted to the inner and outer ring tapered surfaces of the first tapered roller bearing 2 and the second tapered roller bearing 5 and On the first roller 23 and the second roller 53, the number and area of the parts bearing the force are greatly increased, the local stress is reduced, and the first tapered roller bearing 2 and the second roller bearing 2 are extended. The service life of tapered roller bearings 5. At the same time, the clearance in the axial direction of the gear 4 is eliminated, ensuring a more stable operation of the gear 4 and improving the noise level of the transmission mechanism.

A cylinder protrudes from the housing 1, and a first oil hole 3 concentric with the cylinder and a second oil hole 6 perpendicular to the first oil hole 3 are opened on the cylinder. The diameter of the oil hole 3 is larger than the diameter of the second oil hole 6, and the first tapered roller bearing 2 and the second tapered roller bearing 5 are arranged symmetrically on both sides of the second oil hole 6, this The embodiment utilizes the first oil hole 3 and the second oil hole 6 to make the working and assembly process of the first inner ring 22 and the second inner ring 52 more stable, and improve the cylinder's impact on the The supporting function of the first tapered roller bearing 2 and the second tapered roller bearing 5 can avoid material removal and extrusion around the first oil hole 3 and the second oil hole 6 during processing and assembly. Flash dust generated during the pressing process affects the cleanliness.

The housing 1 and the rear cover 8 are cast as one. In this embodiment, the rear cover 8 is made of cast steel with high rigidity, which can improve the rigidity of the transmission mechanism and improve the first tapered roller The service life of the bearing 2 and the second tapered roller bearing 5 is improved, and the running noise of the gear 4 is reduced.

It should be understood that the above specific embodiments of the present utility model are only used to illustrate or explain the principle of the present utility model, but not to limit the present utility model. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present utility model shall be included in the protection scope of the present utility model.

Claims (8)

1. a transmission mechanism of hybrid transmission, is characterized in that, comprises housing (1), the first tapered roller bearing (2), gear (4), the second tapered roller bearing (5) and back cover ( 8), the first tapered roller bearing (2) and the second tapered roller bearing (5) are both arranged between the housing (1) and the gear (4), the first The outer rings of the tapered roller bearing (2) and the second tapered roller bearing (5) are respectively fixedly connected with the housing (1), and the first tapered roller bearing (2) and the second The inner ring of the tapered roller bearing (5) is fixedly connected with the gear (4) respectively, and an adjusting gasket (7) is arranged between the second tapered roller bearing (5) and the rear cover (8) , a cylinder protrudes from the housing (1), and a first oil hole (3) concentric with the cylinder and a second oil hole (3) perpendicular to the first oil hole (3) are opened on the cylinder. hole (6). 2. The transmission mechanism of the hybrid transmission according to claim 1, characterized in that, the first tapered roller bearing (2) and the second tapered roller bearing (5) are symmetrically arranged on the second Both sides of the oil hole (6). 3. The transmission mechanism of the hybrid transmission according to claim 1, characterized in that, the first tapered roller bearing (2) comprises a first outer ring (21), a first inner ring (22) and a first roller (23). 4. The transmission mechanism of the hybrid transmission according to claim 3, characterized in that, the second tapered roller bearing (5) comprises a second outer ring (51), a second inner ring (52) and a second Roller (53). 5. The transmission mechanism of a hybrid transmission according to claim 4, characterized in that, the small end of the first roller (23) is opposite to the second roller (53). 6 . The transmission mechanism of a hybrid transmission according to claim 4 , characterized in that, the first roller ( 23 ) is arranged opposite to the big end of the second roller ( 53 ). 7. The transmission mechanism of a hybrid transmission according to claim 1, characterized in that, the diameter of the first oil hole (3) is larger than the diameter of the second oil hole (6). 8. The transmission mechanism of the hybrid transmission according to claim 1, characterized in that, the housing (1) and the rear cover (8) are cast as one, and the rear cover (8) is made of cast steel production.