CN214331253U

CN214331253U - Automobile driving shaft assembly

Info

Publication number: CN214331253U
Application number: CN202022616509.2U
Authority: CN
Inventors: 胡念明; 庄英武; 刘立峰
Original assignee: Evergrande New Energy Automobile Investment Holding Group Co Ltd
Current assignee: Evergrande New Energy Automobile Investment Holding Group Co Ltd
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2021-10-01
Anticipated expiration: 2030-11-12

Abstract

The application discloses car drive shaft assembly belongs to automobile transmission system spare part design and manufacture field. It includes: the driving device comprises a driving shaft rod, an outer end section and an inner end section, wherein the outer end section and the inner end section are respectively arranged on two sides of the driving shaft rod; the inner end section comprises a three-pin shaft fork, and the three-pin shaft fork is connected with a gear of the transmission or the driving motor; the three-pin shaft fork is provided with an accommodating cavity, and the driving shaft lever extends into the accommodating cavity and is connected with the three-pin shaft fork through a three-pin shaft; and an elastic part is arranged between the end part of the driving shaft rod and the cavity bottom of the accommodating cavity of the three-pin shaft fork, and the elastic force of the elastic part is used for pressing the three-pin shaft fork against a gear of the transmission or the driving motor. The problem of current car utilize the constant speed drive shaft that jump ring and derailleur or driving motor are connected need be considered insertion force and pull out force when the design is solved in this application.

Description

Automobile driving shaft assembly

Technical Field

The application relates to the field of design and manufacture of automobile transmission system parts, in particular to an automobile driving shaft assembly.

Background

The automobile driving shaft is an important part for transmitting power in an automobile transmission system, and has the function of transmitting the power of an engine to wheels together with a gearbox and a drive axle so as to enable an automobile to generate driving force. Constant velocity drive shaft assemblies are very important components in automotive drive trains and often employ two constant velocity joints, one connected to the hub and the other to a transmission or drive motor. The constant-speed driving shaft assembly can stably and efficiently transmit the driving force of the engine to wheels, adapt to suspension motion and adjust the length of the driving shaft in real time, so that the performance and the quality of the constant-speed driving shaft assembly have important influence on the quality of a transmission system and even the whole vehicle.

The common structure of the rear constant velocity drive shaft assembly is as follows: the wheel side universal joint adopts a fixed rzeppa constant velocity universal joint (a fixed joint for short), and the transmission or driving motor side universal joint adopts a telescopic three-pin constant velocity universal joint (a movable joint for short). The movable joint side of the driving shaft and a gear shaft sleeve of the transmission or the driving motor are axially limited by a clamp spring, a clamp spring groove is processed on a half shaft spline, then the clamp spring is installed, and the half shaft is embedded into the half shaft gear through the clamp spring. Because the snap spring has elasticity, the insertion force of the half shaft into the side gear and the extraction force of the snap spring when the half shaft is disassembled need to be controlled. When the insertion force is too large, assembly of an assembly worker is difficult, the problem that the snap spring structure is damaged to cause scrapping of the half shaft or an EDU (electronic data Unit), a transmission or a driving motor is possibly caused due to the fact that the extraction force is too small, and the power interruption failure caused by the fact that the vehicle half shaft is separated from the differential mechanism can occur. Therefore, the design of the insertion angle and the extraction angle of the drive shaft becomes a difficult design problem in the art.

SUMMERY OF THE UTILITY MODEL

The technical problem that this application will be solved is that current car utilizes the constant speed drive shaft that jump ring and derailleur or driving motor are connected need consider the problem of insertion force and withdrawal force when the design. Therefore, the application provides the automobile constant-speed drive shaft assembly which is easy to disassemble and assemble.

In view of the above technical problems, the present application provides the following technical solutions:

an automotive driveshaft assembly, comprising: the driving device comprises a driving shaft rod, an outer end section and an inner end section, wherein the outer end section and the inner end section are respectively arranged on two sides of the driving shaft rod; the inner end section comprises a three-pin shaft fork, and the three-pin shaft fork is connected with a gear of the transmission or the driving motor; the three-pin shaft fork is provided with an accommodating cavity, and the driving shaft lever extends into the accommodating cavity and is connected with the three-pin shaft fork through a three-pin shaft; and an elastic part is arranged between the end part of the driving shaft rod and the cavity bottom of the accommodating cavity of the three-pin shaft fork, and the elastic force of the elastic part is used for pressing the three-pin shaft fork against a gear of the transmission or the driving motor.

In some embodiments of the present application, an end of the driving shaft near the three-pin shaft yoke is provided with a first roller set, and the first roller set includes: a first inner ring roller, a first roller pin is arranged between the first inner ring roller and the driving shaft lever; the first outer ring roller is connected to the outer side of the first inner ring roller in a sliding manner; and the elastic piece is fixedly connected with the first outer ring roller.

In some embodiments of the present application, the driving shaft is provided with a first shoulder, a first connection portion matched with the first roller set is formed between the first shoulder and the end portion, and a first blocking member for blocking the first inner ring roller from moving in a direction away from the driving shaft is arranged on the first connection portion.

In some embodiments of the present application, the elastic member is a conical compression spring, a small end of the conical compression spring is connected to the driving shaft lever through the first roller train, and a large end of the conical compression spring is connected to the three-pin shaft fork.

In some embodiments of this application, the three-pin shaft includes: the three-pin shaft body is sleeved on the driving shaft lever and is uniformly provided with three connecting shafts along the circumferential direction; the second roller group is arranged on the connecting shaft; the second roller group comprises a second inner ring roller, and a second roller pin is arranged between the second inner ring roller and the connecting shaft; and the second outer ring roller is connected to the outer side of the second inner ring roller in a sliding manner.

In some embodiments of the present application, a second blocking member for blocking the second inner ring roller is disposed on the connecting shaft.

In some embodiments of the present application, the driving shaft rod is in spline fit with the three-pin shaft body, three slides are arranged in the accommodating cavities of the three-pin shaft fork corresponding to the positions of the second roller group, and the second roller group is slidably connected to the slides.

In some embodiments of this application, keeping away from of three round pin shaft forks the one end fixedly connected with junk ring of derailleur or driving motor, the inner end festival still includes first sheath, first sheath one end pass through the clamp connect in on the junk ring, the other end pass through the clamp connect in on the driving shaft pole.

In some embodiments of the present application, the outer end section comprises a first gimbal coupled to the drive shaft, the first gimbal comprising: the star frame is fixedly connected to the driving shaft rod, and a plurality of first ball tracks are arranged on the outer peripheral surface of the star frame; the outer side of the star frame is provided with a plurality of second ball paths; the first ball path and the second ball path are oppositely arranged; the steel ball retainer is used for supporting the steel ball, and the steel ball is arranged in a steel ball raceway formed by the first ball channel and the second ball channel.

In some embodiments of the present application, the outer end section further comprises a second sheath, one end of the second sheath is connected to the bell housing by a clamp, and the other end of the second sheath is connected to the driving shaft rod by a clamp.

Compared with the prior art, the technical scheme of the application has the following technical effects:

the application provides an among the automobile drive shaft assembly, set up the elastic component between the tip of driving shaft pole and the chamber end that holds the chamber of three round pin shaft yoke, in the vehicle operation, because outer end section relative position is motionless, therefore, the elastic component has a reverse elastic force F to three round pin shaft yoke, elastic force F presses three round pin shaft yoke in the differential mechanism on the side gear, so the jump ring need not be installed to the outer terminal surface of three round pin shaft yoke, the elasticity through the elastic component is impressed the inner end section in the side gear, form from inserting the drive shaft structure, make its dismouting easy and operational reliability higher.

Drawings

The objects and advantages of this application will be appreciated by the following detailed description of the preferred embodiments thereof, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic structural view of one embodiment of an automotive drive axle assembly of the present application;

FIG. 2 is a cross-sectional view of an inner joint portion of one embodiment of the automotive driveshaft assembly of the present application;

FIG. 3 is a partial view of the mating portion of the drive shaft and the inner stub in one embodiment of the automotive driveshaft assembly of the present application;

FIG. 4 is a partial exploded view of an inner end section of one embodiment of the automotive drive axle assembly of the present application;

FIG. 5 is an assembly view of an inner joint portion of one embodiment of the automotive drive axle assembly of the present application;

FIG. 6 is a cross-sectional view C-C of FIG. 5;

fig. 7 is a sectional view B-B of fig. 5.

Detailed Description

The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments. 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 application.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In addition, the technical features mentioned in the different embodiments of the present application described below may be combined with each other as long as they do not conflict with each other.

One embodiment of an automotive drive axle assembly as disclosed herein is shown in FIG. 1. This drive shaft assembly includes: the driving shaft comprises a driving shaft 100, an outer end section 200 and an inner end section 300, wherein the outer end section 200 and the inner end section 300 are respectively arranged on two sides of the driving shaft 100, the outer end section 200 is used for being connected with a wheel, and the inner end section 300 is used for being connected with a transmission or a driving motor; the drive shaft assembly is used for outputting the power of an engine to the wheels.

Wherein the inner end section 300 comprises a three-pin shaft fork 301, and the three-pin shaft fork 301 is connected with a gear of the transmission or the driving motor; the three-pin shaft fork 301 is provided with a containing cavity 301a, and the driving shaft rod 100 extends into the containing cavity 301a and is connected with the three-pin shaft fork 301 through a three-pin shaft 302; an elastic member 304 is disposed between an end of the driving shaft 100 and a bottom of the accommodating cavity 301a of the three-pin shaft yoke 301, and an elastic force of the elastic member 304 is used for pressing the three-pin shaft yoke 301 against a gear of the transmission or the driving motor.

During the operation of the vehicle, the relative position of the outer end joint 200 is not changed, so the elastic piece 304 has an opposite elastic force F to the three-pin shaft fork 301, and the elastic force F presses the three-pin shaft fork 301 on the differential inner side gear, so the outer end surface of the three-pin shaft fork 301 does not need to be provided with a snap spring, and the inner end joint 300 is pressed into the side gear by the elastic force of the elastic piece 304, thereby forming a self-inserting type driving shaft structure, and ensuring that the self-inserting type driving shaft structure is easy to assemble and disassemble and has high working reliability.

Specifically, a first roller set 303 is disposed at one end of the driving shaft 100 near the three-pin shaft fork 301. As shown in fig. 2, the first roller set 303 includes: a first inner ring roller 3031 and a first outer ring roller 3033, wherein a first roller pin 3032 is arranged between the first inner ring roller 3031 and the drive shaft lever 100; the first outer ring roller 3033 is connected to the outer side of the first inner ring roller 3031 in a sliding manner; by arranging the first roller set 303, the driving shaft 100 can be adjusted adaptively when the vehicle turns or bumps.

The elastic member 304 is fixedly connected with the first outer ring roller 3033, the fixed connection mode is not unique, one mode may be that a groove or a protrusion is arranged at the end of the first outer ring roller 3033, the elastic member 304 is inserted into the groove or sleeved on the protrusion, and the other mode may be that the elastic member 304 and the first outer ring roller 3033 are fixed by directly adopting a welding mode.

More specifically, as shown in fig. 3, the driving shaft 100 is provided with a first shoulder 100a, a first connection portion 100b is formed between the first shoulder 100a and the end portion for cooperating with the first roller set 303, and a first blocking member 305 for blocking the first inner ring roller 3031 from moving away from the driving shaft 100 is arranged on the first connection portion 100 b. The first blocking member 305 is specifically a retaining ring and/or a snap spring sleeved on the driving shaft lever 100, and the first roller set 303 realizes two-side limitation through the first shoulder 100a and the first blocking member 305, so that axial slippage during work is avoided, and the working reliability is high.

Specifically, the elastic member 304 is a conical compression spring, a small end of the conical compression spring is connected to the driving shaft 100, and a large end of the conical compression spring is connected to the three-pin yoke 301. In the process of vertical run-out of the vehicle, the elastic piece 304 is always in a compressed state, the three pin shafts 302 slide in the slide way along with the vertical run-out of the vehicle, when the three pin shafts slide to different positions, the reverse elastic force generated by the conical compression spring is different in size, the larger the compression of the conical compression spring is, the larger the elastic force F is, the smaller the compression of the conical compression spring is, the smaller the elastic force F is, but the elastic force F is larger than 1000N in the whole process, and the application has no limit on the material, the diameter and the length of the conical compression spring.

As shown in fig. 4 and 7, the three-pin 302 includes a three-pin body 3021 and three second roller groups 3022; the three-pin shaft body 3021 is sleeved on the driving shaft lever 100, and three connecting shafts 3023 are uniformly arranged on the three-pin shaft body 3021 along the circumferential direction thereof; the second roller group 3022 is disposed on the connecting shaft 3023; the second roller group 3022 includes a second inner ring roller 30221 and a second outer ring roller 30222, and a second needle roller 30223 is disposed between the second inner ring roller 30221 and the connecting shaft 3023; the second outer ring roller 30222 is slidably connected to the outer side of the second inner ring roller 30221.

Specifically, the connecting shaft 3023 is provided with a second blocking member 306 for blocking the second inner ring roller 30221, so that the second roller group 3022 is limited, and axial slippage during operation is avoided.

Specifically, the driving shaft 100 and the three-pin shaft body 3021 are spline-fitted, as shown in fig. 6, three slide ways 301b are disposed in the accommodating cavity 301a of the three-pin shaft fork 301 corresponding to the positions of the three second roller sets 3022, the second roller sets 3022 are slidably connected to the slide ways 301b, and specifically, the second outer-ring roller 30222 is slidable along the slide ways 301 b.

After the parts (including the three-pin shaft 302, the driving shaft 100, the first roller set 303, the elastic member 304, and the like) inside the accommodating cavity 301a of the three-pin shaft yoke 301 are installed, necking is performed on the three-pin shaft yoke 301 through a riveting process, a riveting process hole is formed after riveting, and the three-pin shaft 302 roller can be prevented from sliding out of the three-pin shaft yoke 301 through the riveting process.

Specifically, in order to prevent dust from falling into the accommodating cavity 301a of the three-pin yoke 301 to affect the movement between the movable parts, as shown in fig. 1, the inner end section 300 further includes a first sheath 307 for blocking one side of the accommodating cavity 301 a. Specifically, a bushing 308 is fixedly connected to one end of the three-pin shaft yoke 301, which is away from the transmission or the driving motor, the bushing 308 is sleeved on the three-pin shaft yoke 301, one end of the first sheath 307 is connected to the bushing 308 through a yoke, and the other end of the first sheath is connected to the driving shaft 100 through a yoke.

Specifically, as shown in fig. 1, the outer end joint 200 includes a first universal joint 201 connected to the driving shaft 100, wherein the first universal joint 201 includes: the device comprises a star frame 2011, an outer shell 2012 positioned outside the star frame 2011, and a steel ball 2013 and a steel ball retainer 2014 positioned between the star frame 2011 and the outer shell 2012.

The star frame 2011 is fixedly connected to the driving shaft 100, and a plurality of first ball tracks are arranged on the outer peripheral surface of the star frame; a plurality of second ball channels are arranged on the inner peripheral surface of the outer shell 2012; the first ball path and the second ball path are oppositely arranged; the steel ball retainer 2014 is used for supporting the steel ball 2013, and the steel ball 2013 is arranged in a steel ball 2013 raceway formed by the first ball path and the second ball path.

More specifically, the outer end section 200 includes an output shaft 203 for connection to the wheel, the output shaft 203 being integrally formed with the outer shell 2012.

Similarly, in order to prevent dust from falling into the first universal joint 201 and affecting the fit between the movable parts, the outer end joint 200 further includes a second sheath 202, and one end of the second sheath 202 is connected to the outer shell 2012 by a clamp, and the other end is connected to the driving shaft 100 by a clamp.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of this invention are intended to be covered by the present application.

Claims

1. An automotive driveshaft assembly, comprising:

the driving device comprises a driving shaft rod, an outer end section and an inner end section, wherein the outer end section and the inner end section are respectively arranged on two sides of the driving shaft rod; the method is characterized in that:

the inner end section comprises a three-pin shaft fork, and the three-pin shaft fork is connected with a gear of the transmission or the driving motor; the three-pin shaft fork is provided with an accommodating cavity, and the driving shaft lever extends into the accommodating cavity and is connected with the three-pin shaft fork through a three-pin shaft;

and an elastic part is arranged between the end part of the driving shaft rod and the cavity bottom of the accommodating cavity of the three-pin shaft fork, and the elastic force of the elastic part is used for pressing the three-pin shaft fork against a gear of the transmission or the driving motor.

2. The automotive drive axle assembly of claim 1, wherein:

one end of the driving shaft rod close to the three-pin shaft fork is provided with a first roller group, and the first roller group comprises: a first inner ring roller, a first roller pin is arranged between the first inner ring roller and the driving shaft lever; the first outer ring roller is connected to the outer side of the first inner ring roller in a sliding manner; and the elastic piece is fixedly connected with the first outer ring roller.

3. The automotive drive axle assembly of claim 2, wherein:

the driving shaft rod is provided with a first shoulder, a first connecting part matched with the first roller set is formed between the first shoulder and the end part, and a first blocking part used for blocking the first inner ring roller from moving in the direction far away from the driving shaft rod is arranged on the first connecting part.

4. The automotive drive axle assembly of claim 2, wherein:

the elastic part is a conical compression spring, the small end of the conical compression spring is connected with the driving shaft rod through the first roller train, and the large end of the conical compression spring is connected with the three-pin shaft fork.

5. The automotive drive axle assembly of claim 1, wherein: the three round pin axles include:

the three-pin shaft body is sleeved on the driving shaft lever and is uniformly provided with three connecting shafts along the circumferential direction;

the second roller group is arranged on the connecting shaft; the second roller group comprises a second inner ring roller, and a second roller pin is arranged between the second inner ring roller and the connecting shaft; and the second outer ring roller is connected to the outer side of the second inner ring roller in a sliding manner.

6. The automotive drive axle assembly of claim 5, wherein:

and a second blocking piece used for blocking the second inner ring roller is arranged on the connecting shaft.

7. The automotive drive axle assembly of claim 5, wherein:

the driving shaft lever is matched with the three-pin shaft body through splines, three slide ways are arranged in the containing cavity of the three-pin shaft fork corresponding to the positions of the three second roller groups, and the second roller groups are connected to the slide ways in a sliding mode.

8. The automotive drive axle assembly of claim 1, wherein:

one end, far away from the transmission or the driving motor, of the three-pin shaft fork is fixedly connected with a lining ring, the inner end section further comprises a first sheath, one end of the first sheath is connected to the lining ring through a hoop, and the other end of the first sheath is connected to the driving shaft rod through the hoop.

9. The automotive drive axle assembly of claim 1, wherein: the outer end section includes a first gimbal connected with the drive shaft, the first gimbal including:

the star frame is fixedly connected to the driving shaft rod, and a plurality of first ball tracks are arranged on the outer peripheral surface of the star frame;

the outer side of the star frame is provided with a plurality of second ball paths; the first ball path and the second ball path are oppositely arranged;

the steel ball retainer is used for supporting the steel ball, and the steel ball is arranged in a steel ball raceway formed by the first ball channel and the second ball channel.

10. The automotive drive axle assembly of claim 9, wherein: the outer end section further comprises a second sheath, one end of the second sheath is connected to the outer bell shell through a hoop, and the other end of the second sheath is connected to the driving shaft rod through the hoop.