CN216923153U

CN216923153U - Gear engaging structure

Info

Publication number: CN216923153U
Application number: CN202220344536.5U
Authority: CN
Inventors: 李晨; 孙春艳; 姚家恒
Original assignee: Baoji Fast Gear Co Ltd
Current assignee: Baoji Fast Gear Co Ltd
Priority date: 2022-02-18
Filing date: 2022-02-18
Publication date: 2022-07-08
Anticipated expiration: 2032-02-18

Abstract

The utility model discloses a gear engaging structure, which is characterized in that the profile of a sliding sleeve spline joint part is improved and optimized, and a large sliding sleeve structure is designed, so that an arc angle is designed on the spline end surface of a gear, the sliding sleeve spline corresponding to the arc angle is also designed with the arc angle, radial component force can be generated after the two arc surfaces are contacted, the gear and the sliding sleeve rotate relatively, and finally, a tooth socket is opposite to a tooth crest, so that gear entering is smooth. Utilize big sliding sleeve structure to combine the external spline of gear with the internal spline of sliding sleeve, increased the quantity of sliding sleeve spline, effectively reduced the probability of top chi, very big improvement the success rate of putting into gear.

Description

Gear engaging structure

Technical Field

The utility model belongs to the field of automobile transmissions, and particularly relates to a gear engaging structure.

Background

The traditional sliding sleeve structure gearbox realizes the operation of gear engaging and gear reversing by means of meshing of a gear spline and a spline of a sliding sleeve. The sliding sleeve structure transmission is not provided with a synchronizer, and the requirement on a driver is higher due to the fact that the gear is difficult to engage due to the limitation of the structure of the transmission. The gear shifting can be achieved only by engaging gears for many times, the service lives of relevant parts of the transmission are shortened, and the labor intensity of a driver is increased.

In the traditional structure, the spline end surface of the gear is provided with a chamfer plane, and the corresponding sliding sleeve spline is also provided with a chamfer plane. When the gear is engaged, the gear can be shifted only when the tooth sockets of the reverse gear and the climbing spline meet the tooth tops of the sliding sleeve splines; when the tooth tops of the gear splines meet the tooth tops of the sliding sleeve splines, the sliding sleeve splines are deadly jacked up with the gear splines, and the gear can be shifted only by engaging the gear again after the gear is shifted out. When the transmission is in gear, the internal spline of the gear is meshed with the external spline of the sliding sleeve to realize gear engaging and gear disengaging operation. Because the restriction of derailleur inner space, the chi is pushed up easily to current gear internal spline and sliding sleeve external spline, and the success rate of putting into gear is low.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides a gear engaging structure.

In order to achieve the purpose, the utility model adopts the following technical scheme to realize the purpose:

a gear engaging structure comprises a shifting fork, a high-gear, a sliding sleeve, a shifting fork shaft, a gear shaft, a sliding sleeve tooth holder and a low-gear;

the shifting fork is fastened with the shifting fork shaft together, the high-gear and the low-gear are axially fixed on the gear shaft, the sliding sleeve is connected with the sliding sleeve tooth holder through a spline, the sliding sleeve tooth holder is connected with the gear shaft, and the end face of the spline is designed to be an arc angle.

Further, the shifting fork and the shifting fork shaft are fastened together through a pin.

Furthermore, the high-gear is axially fixed on the gear shaft through a spacer.

Further, the fork shaft is mounted on the transmission housing.

Further, the gear shaft is mounted on a bearing.

Furthermore, the sliding sleeve tooth holder is connected with the gear shaft through a spline.

Furthermore, the low-gear is axially fixed on the gear shaft through a spacer.

Further, the splines include slip sleeve splines and gear splines.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model provides a gear engaging structure, which mainly solves the problem of difficult gear engaging of a sliding sleeve structure transmission from two aspects, wherein 1 is the improvement and optimization of the profile of a sliding sleeve spline joint part, an arc angle is designed on the spline end surface of a gear, and an arc angle is also designed on a corresponding sliding sleeve spline. When engaging gear, the gear can be engaged even if the tooth tops of the gear splines are opposite to the tooth tops of the sliding sleeve splines. In the new structure, the end faces of the two splines of the gear and the sliding sleeve are designed with arc angles, and the two arc faces can generate radial component force after being contacted, so that the gear and the sliding sleeve rotate relatively, and finally, the tooth socket is opposite to the tooth crest to smoothly enter the gear. Its 2 is the design of big sliding sleeve structure, utilizes the big sliding sleeve structure of new design to combine the external spline of gear with the internal spline of sliding sleeve, has increased the quantity of sliding sleeve spline, has effectively reduced the probability of top chi, very big improvement the success rate of putting into gear, and then the life of the relevant part of extension derailleur, reduced driver's intensity of labour, can improve driving comfort, security and reliability.

Drawings

In order to more clearly explain the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a modified view of the spline structure of the present invention.

Fig. 2 is a structural view of the present invention.

Fig. 3 is a structural view of the sliding sleeve of the present invention.

Wherein: 1-a shifting fork, 2-a high-gear, 3-a sliding sleeve, 4-a shifting fork shaft, 5-a gear shaft, 6-a sliding sleeve gear seat, 7-a low-gear, 8-a spacer and 9-a pin.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "upper", "lower", "horizontal", "inner", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the products of the present invention are used, the description is only for convenience and simplicity, but the indication or suggestion that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the term "horizontal", if present, does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be broadly construed and interpreted as including, for example, fixed connections, detachable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The utility model is described in further detail below with reference to the accompanying drawings:

referring to fig. 1 and 2, the embodiment of the utility model discloses a gear engaging structure, which comprises a shifting fork 1, a high gear 2, a sliding sleeve 3, a shifting fork shaft 4, a gear shaft 5, a sliding sleeve tooth holder 6, a low gear 7, a spacer 8 and a pin 9. When the gear is engaged, the sliding sleeve 3 moves rightwards, the spline of the sliding sleeve 3 is meshed with the spline of the high gear 2, and power is transmitted after the gear is engaged successfully. When the tooth crest of the spline of the high gear 2 is opposite to the tooth crest of the spline of the sliding sleeve 3, the end faces of the two splines of the high gear 2 and the sliding sleeve 3 are designed with arc angles which are contacted with each other to generate radial component force, so that the high gear 2 and the sliding sleeve 3 rotate relatively, and finally, the tooth groove of the spline is opposite to the tooth crest to smoothly enter into the gear.

As shown in fig. 2 and 3, in the large sliding sleeve gear engaging structure, a sliding sleeve tooth holder 6 is connected with a gear shaft 5 through a spline, a sliding sleeve 3 is connected with the sliding sleeve tooth holder 6 through a spline, a shifting fork shaft 4 and a shifting fork 1 are fastened together through a pin 9 by interference fit, the shifting fork shaft 4 is installed on a transmission housing, a high gear 2 and a low gear 7 are axially fixed on the gear shaft 5 through a spacer 8, and the gear shaft 5 is installed on a transmission bearing.

The working process of the utility model is as follows:

when the gear needs to be put into gear, the shifting fork 1 drives the sliding sleeve 3 to move axially towards the right side on the sliding sleeve tooth holder 6, and the sliding sleeve tooth holder 6 keeps axially static on the gear shaft 5. When the internal spline of the sliding sleeve 3 is meshed with the external spline of the high-gear 2, the transmission is shifted to the upper gear to transmit power; when the gear needs to be shifted back, the shifting fork 1 drives the sliding sleeve 3 to move axially to the left on the sliding sleeve tooth holder 6, and when the internal spline of the sliding sleeve 3 is meshed with the external spline of the high-gear 2 and disconnected, the transmission is shifted out to transmit power and finally disconnected.

In a preferred embodiment of the utility model, the design is equally applicable to other gears of a gearbox without synchronizer.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A gear engaging structure is characterized by comprising a shifting fork (1), a high-gear (2), a sliding sleeve (3), a shifting fork shaft (4), a gear shaft (5), a sliding sleeve tooth holder (6) and a low-gear (7);

the shifting fork (1) is fastened with a shifting fork shaft (4), the high-gear (2) and the low-gear (7) are axially fixed on the gear shaft (5), the sliding sleeve (3) is connected with the sliding sleeve tooth holder (6) through a spline, the sliding sleeve tooth holder (6) is connected with the gear shaft (5), and the end face of the spline is designed to be an arc angle.

2. A gear arrangement according to claim 1, characterized in that the fork (1) and the fork shaft (4) are fastened together by means of a pin (9).

3. A gear arrangement according to claim 1, characterised in that the high gear wheel (2) is axially fixed to the gear shaft (5) by means of spacers (8).

4. A gear arrangement according to claim 1, characterized in that the fork shaft (4) is mounted on a transmission housing.

5. A gear arrangement according to claim 1, characterised in that the gear shaft (5) is mounted on bearings.

6. A gear arrangement according to claim 1, characterised in that the sliding sleeve toothholder (6) is connected to the gear shaft (5) by means of splines.

7. A gear arrangement according to claim 1, characterised in that the low gear wheel (7) is axially fixed to the gear shaft (5) by means of spacers (8).

8. The gear shift arrangement of claim 1 wherein said splines comprise slip sleeve splines and gear splines.