CN215487591U

CN215487591U - Gearbox and vehicle

Info

Publication number: CN215487591U
Application number: CN202122387606.3U
Authority: CN
Inventors: 蔡学钦; 吴茂柱; 刘航
Original assignee: Honeycomb Transmission Technology Hebei Co Ltd
Current assignee: Honeycomb Transmission Technology Hebei Co Ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-01-11
Anticipated expiration: 2031-09-29

Abstract

The utility model discloses a transmission and a vehicle, the transmission includes: a box body; the input shaft is arranged in the box body and is provided with an external spline; the planet carrier is arranged in the box body and provided with a through hole, an internal spline is arranged in the through hole, and the internal spline is matched with the external spline; the centering piece is fixed in the through hole and is arranged at intervals in the axial direction of the input shaft together with the internal spline, and the centering piece is in clearance fit with the input shaft. Can satisfy torque transmission's demand through setting up the centering piece, also can satisfy accurate centering steady operation's requirement simultaneously, the running life-span and the transmission efficiency of input shaft have effectively been improved, this structural design compact structure saves space, it is more convenient to install, and is comparatively practical, and be clearance fit between centering piece and the input shaft, the centering piece plays the centering effect to the input shaft promptly, ensure the accurate nature of high-speed running precision and torque transmission, promote gearbox assembly precision and running precision, promote product quality.

Description

Gearbox and vehicle

Technical Field

The utility model relates to the technical field of gearboxes, in particular to a gearbox and a vehicle.

Background

The AT transmission is one of the common transmission types of the whole automobile, and has the advantages of good smoothness, wide application range, mature technology and the like. The AT transmission achieves the purpose of changing the speed change ratio by different connection modes of a plurality of internal clutches through a shaft and a plurality of groups of planet rows. Due to the space structure and layout, AT transmissions often place more emphasis on functional implementation, and no higher demands are made on the strength and durability of the overall assembly.

In the prior art, the internal spline of the planet carrier is a blind hole spline (integrated piece), the long spline is not beneficial to processing, the forging forming precision is low, and the assembling requirement cannot be met. Or, the spline in the planet carrier is a through spline, so that the processing is facilitated, the precision meets the assembly requirement, the input shaft cannot be centered, the assembly precision is low, and the quality of the whole box is influenced.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the gearbox provided by the utility model can meet the requirement of torque transmission by arranging the centering piece, can also meet the requirement of accurate centering and stable operation, effectively prolongs the operation life and the transmission efficiency of the input shaft, and has the advantages of compact structural design, space saving, more convenience in installation and higher practicability.

The utility model also provides a vehicle.

A gearbox according to an embodiment of the first aspect of the utility model comprises: a box body; the input shaft is arranged in the box body and is provided with an external spline; the planet carrier is arranged in the box body and provided with a through hole, an internal spline is arranged in the through hole, and the internal spline is matched with the external spline; the centering piece is fixed in the through hole and is arranged at intervals in the axial direction of the input shaft together with the internal spline, and the centering piece is in clearance fit with the input shaft.

According to the gearbox provided by the embodiment of the utility model, the requirement of torque transmission can be met by arranging the centering piece, the requirement of accurate centering and stable operation can also be met, the operation life and the transmission efficiency of the input shaft are effectively improved, the structural design structure is compact, the space is saved, the installation is more convenient and practical, and the centering piece and the input shaft are in clearance fit, namely the centering piece plays a centering role on the input shaft, so that the high-speed operation precision and the accuracy of torque transmission are ensured, the assembly precision and the operation precision of the gearbox are improved, and the product quality is improved.

According to some embodiments of the utility model, the centering member is formed in a ring shape and is fitted over the input shaft.

According to some embodiments of the utility model, the centering member is an interference fit with the through hole.

According to some embodiments of the utility model, the inner diameter of the centering member is Φ 1, the outer diameter of the input shaft is Φ 2, and the Φ 1 and the Φ 2 satisfy the relationship: phi 2 is more than or equal to 22.5mm and phi 1 is more than or equal to 23.5 mm.

According to some embodiments of the utility model, the axial dimension of the centering member is h1, the h1 satisfies the relation: h1 is more than or equal to 5mm and less than or equal to 10 mm.

According to some embodiments of the utility model, the centering member has a thickness h2, and h2 satisfies the relationship: h2 is more than or equal to 2mm and less than or equal to 4 mm.

According to some embodiments of the utility model, the internal spline extends from one end of the through hole into the through hole, and the centering member is disposed at the other end of the through hole.

According to some embodiments of the utility model, an end surface of the centering member facing away from the internal spline is flush with an end surface of the planet carrier corresponding to the other end of the through hole.

According to some embodiments of the utility model, a side of the centering piece facing the internal spline is provided with a guide slope for fitting.

According to a second aspect embodiment of the utility model, a vehicle comprises the gearbox of the above embodiment.

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

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic block diagram of a transmission according to an embodiment of the present invention;

fig. 2 is a partial schematic view a of fig. 1.

Reference numerals:

100. a gearbox; 10. an input shaft; 11. an external spline; 12. a shaft body; 20. a planet carrier; 21. an internal spline; 30. a centering member; 31. a guide slope.

Detailed Description

Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.

A transmission 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 2, and the present invention also proposes a vehicle having the transmission 100 described above.

Referring to fig. 1 and 2, a transmission case 100 according to an embodiment of the present invention includes: the input shaft 10 is arranged in the box body, the input shaft 10 is provided with an external spline 11, the planet carrier 20 is arranged in the box body, the planet carrier 20 is provided with a through hole, an internal spline 21 is arranged in the through hole, and the internal spline 21 is in spline fit with the external spline 11. That is, the planet carrier 20 and the input shaft 10 are engaged with each other, and the planet carrier 20 and the input shaft 10 rotate together, i.e., the input shaft 10 plays a role of supporting and torque transmitting during the operation of the transmission 100. Wherein, in order to ensure the accuracy and stability of the transmission between the planet carrier 20 and the input shaft 10, the spline is matched with the external spline 11 through the internal spline 21. Specifically, the input shaft 10 includes a shaft body 12 and an external spline 11, and the external spline 11 is provided on the shaft body 12.

Further, as shown in fig. 2, the transmission case 100 further includes: and the centering piece 30 is fixed in the through hole and is arranged at intervals with the internal spline 21 in the axial direction of the input shaft 10, and the centering piece 30 is in clearance fit with the input shaft 10. The centering piece 30 is used for the spline connection self-centering structure of the input shaft 10 of the transmission 100, the structure meets the requirement of torque transmission, meanwhile, the requirement of accurate centering and stable operation can be met, and the service life and the transmission efficiency of the input shaft 10 are effectively improved. The automobile torque transmission device is compact in structural design structure, saves space, is more convenient to install, is practical, and meets the requirements of consumers on automobile transmission of large torque and safety.

And, the centering piece 30 is in close clearance fit with the non-spline excircle of the input shaft 10, namely the centering piece 30 plays a centering role in the input shaft 10, so that the high-speed running precision and the precision of torque transmission are ensured, the assembling precision and the running precision of the gearbox 100 are improved, and the product quality is improved.

From this, can satisfy torque transmission's demand through setting up centering piece 30, also can satisfy accurate centering steady operation's requirement simultaneously, the running life-span and the transmission efficiency of input shaft 10 have effectively been improved, this structural design compact structure saves space, it is more convenient to install, and is comparatively practical, and be clearance fit between centering piece 30 and the input shaft 10, centering piece 30 plays the centering effect to input shaft 10 promptly, ensure the accurate nature of high-speed running precision and moment of torsion transmission, promote gearbox 100 assembly precision and running precision, promote product quality.

Wherein the centering member 30 is formed in a ring shape, and the centering member 30 is fitted over the input shaft 10. So, centering 30 forms into cyclic annularly, makes centering 30 can overlap on input shaft 10 like this to it is more stable when establishing between input shaft 10 and planet carrier 20 to make centering 30 press from both sides, and centering 30 can be better plays the centering to input shaft 10 promptly, ensures the high-speed precision of running and the accurate nature of moment of torsion transmission, promotes the assembly precision and the running precision of gearbox 100, promotes gearbox 100's product quality.

Further, the centering member 30 is interference-fitted with the through hole. Wherein, the centering member 30 is in interference fit with the inner wall of the planet carrier 20, and the matched assembly is mounted on the external spline 11 of the input shaft 10 by spline fit, that is, the arrangement can facilitate the mounting of the centering member 30. And, when the installation of the centering member 30, the planet carrier 20 and the input shaft 10 is completed, the interference fit between the centering member 30 and the through hole can make the centering member 30 more stable when the transmission 100 operates, i.e., not separated from the planet carrier 20.

Referring to fig. 2, the inner diameter of the centering member 30 is Φ 1, the outer diameter of the input shaft 10 is Φ 2, and Φ 1 and Φ 2 satisfy the relationship: phi 2 is more than or equal to 22.5mm and phi 1 is more than or equal to 23.5 mm. Wherein the length of the input shaft 10 is 520mm, and the outer diameter φ 2 of the input shaft 10 is between 22.5mm and 23.5mm, so that the outer diameter φ 2 of the input shaft 10 is not small in size, i.e. the input shaft 10 is not too thin to cause poor structural strength of the input shaft 10, and is not too thick to cause over-size of the transmission 100. In addition, the internal diameter phi 1 of centering piece 30 is greater than the external diameter phi 2 of input shaft 10, makes like this for clearance fit between centering piece 30 and the input shaft 10 to can play the centering effect to elongated input shaft 10, ensure high-speed running accuracy and the precision of moment of torsion transmission, promote the holistic assembly precision and the running accuracy of gearbox 100, promote product quality.

Referring to FIG. 2, the axial dimension of the centering member 30 is h1, and h1 satisfies the relationship: h1 is more than or equal to 5mm and less than or equal to 10 mm. So set up, set up the axial dimension h1 of centering 30 between 5-10mm for centering 30 can be fine satisfy accurate centering steady operation's requirement, and avoid invading the structure of internal spline 21 and external spline 11. For example, when h1 is less than 5mm, the size of the centering member 30 is small, and when the centering member 30 is sandwiched between the carrier 20 and the input shaft 10, the requirement of accurate centering and smooth operation cannot be well satisfied, i.e., the function of the centering member 30 cannot be realized. And, when h1 > 10mm, the axial dimension of the centering member 30 is too large, and the centering member 30 intrudes into the structures of the internal spline 21 and the external spline 11 in the axial direction, so that the fitting strength between the internal spline 21 and the external spline 11 is poor.

Further, as shown in fig. 2, the centering member 30 has a thickness h2, and h2 satisfies the relationship: h2 is more than or equal to 2mm and less than or equal to 4 mm. So set up, set up the thickness h2 of centering 30 between 2-4mm for centering 30 can be fine satisfy accurate centering steady operation's requirement, and avoid the wearing and tearing of centering 30. For example, when h2 < 2mm, the thickness of the centering member 30 is small, and the centering member 30 is easily damaged when it is worn while the transmission 100 is in operation. And, when h1 is greater than 4mm, the thickness of the centering member 30 is too large, so that the size between the planet carrier 20 and the input shaft 10 is too large, that is, the size of the internal spline 21 and the external spline 11 is large, which not only is inconvenient for processing the internal spline 21 and the external spline 11, but also causes the overall size of the transmission 100 to be too large after the planet carrier 20 and the input shaft 10 are matched.

As shown in fig. 2, the internal spline 21 extends from one end of the through hole into the through hole, and the centering member 30 is provided at the other end of the through hole. That is to say, the internal spline 21 of planet carrier 20 is the through spline, is favorable to the processing of internal spline 21 like this to the precision satisfies the assembly requirement, and is provided with centering 30 at the other end of through-hole, can satisfy torque transmission's demand like this, also can satisfy accurate centering steady operation's requirement simultaneously, has effectively improved the running life and the transmission efficiency of the input shaft 10 of gearbox 100.

Referring to fig. 2, the end surface of the centering member 30 facing away from the internal spline 21 is flush with the end surface of the other end of the corresponding through hole of the planet carrier 20. In this way, when the centering member 30 is interposed between the planet carrier 20 and the input shaft 10, the end surface of the centering member 30 may be flush with the other end surface of the planet carrier 20, so that the integrity of the planet carrier 20 is better, and the centering member 30 may reduce the size of the transmission 100, and the centering member 30 may not affect the use of other components.

As shown in fig. 2, a side of the centering member 30 facing the internal spline 21 is provided with a guide slope 31 for fitting. Wherein, the guide slope 31 can face the planet carrier 20, when the centering member 30 is installed with the planet carrier 20, the guide slope 31 can facilitate the matching of the centering member 30 and the planet carrier 20, thereby improving the installation efficiency of the centering member 30 and the planet carrier 20. And, the guide slope 31 may face the input shaft 10, and when the centering member 30 is mounted with the input shaft 10, the guide slope 31 may facilitate the fitting of the centering member 30 with the input shaft 10, so that the mounting efficiency of the centering member 30 with the input shaft 10 may be improved. In this way, the efficiency of the installation of the transmission 100 can be improved.

A vehicle according to an embodiment of the second aspect of the utility model includes the transmission 100 of the above embodiment. The centering piece 30 is arranged between the planet carrier 20 and the input shaft 30, so that the requirement of torque transmission can be met, the requirement of accurate centering and stable operation can be met, the service life and the transmission efficiency of the input shaft 10 are effectively prolonged, the structural design is compact in structure, the space is saved, and the installation is more convenient and practical.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A transmission, comprising:

a box body;

the input shaft is arranged in the box body and is provided with an external spline;

the planet carrier is arranged in the box body and provided with a through hole, an internal spline is arranged in the through hole, and the internal spline is matched with the external spline;

the centering piece is fixed in the through hole and is arranged at intervals in the axial direction of the input shaft together with the internal spline, and the centering piece is in clearance fit with the input shaft.

2. The transmission of claim 1, wherein the centering member is formed in a ring shape and fits over the input shaft.

3. The transmission of claim 2, wherein the centering member is an interference fit with the through bore.

4. The transmission of claim 1, wherein the centering member has an inner diameter of Φ 1 and the input shaft has an outer diameter of Φ 2, the Φ 1 and the Φ 2 satisfying the relationship: phi 2 is more than or equal to 22.5mm and phi 1 is more than or equal to 23.5 mm.

5. The gearbox of claim 1, wherein the axial dimension of the centering member is h1, the h1 satisfying the relationship: h1 is more than or equal to 5mm and less than or equal to 10 mm.

6. The transmission of claim 1, wherein the centering member has a thickness h2, and wherein h2 satisfies the relationship: h2 is more than or equal to 2mm and less than or equal to 4 mm.

7. The transmission of claim 1, wherein the internal spline extends from one end of the through bore into the through bore, and the centering element is disposed at the other end of the through bore.

8. The gearbox of claim 7, wherein an end surface of the centering member facing away from the internal spline is flush with an end surface of the planet carrier corresponding to the other end of the through hole.

9. A gearbox according to claim 1, characterised in that the side of the centring member facing the internal splines is provided with a guide ramp for engagement.

10. A vehicle, characterized by comprising: a gearbox according to any one of claims 1 to 9.