CN211820661U

CN211820661U - Shaft assembly and transmission

Info

Publication number: CN211820661U
Application number: CN202020232779.0U
Authority: CN
Inventors: 徐燚伟; 崔东伟; 曹维; 王阳光; 栗永清; 张永昕; 安荡; 赵伟杰; 陈亚辉
Original assignee: Haima Motor Corp; Haima New Energy Vehicle Co Ltd
Current assignee: Haima Motor Corp; Haima New Energy Vehicle Co Ltd
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2020-10-30
Anticipated expiration: 2030-02-28

Abstract

The utility model provides an axle assembly and derailleur relates to derailleur technical field. The shaft assembly comprises a transmission shaft and a limiting device arranged on the transmission shaft. The limiting device comprises a gasket and a radial limiting part, the gasket is sleeved on the transmission shaft and used for being arranged between the first transmission part and the second transmission part, and the radial limiting part is connected with the gasket so as to limit the radial displacement of the gasket. The limiting device can well solve the problems of axial movement and radial displacement of the gasket and the abrasion and ablation of the gasket. The transmission comprises the shaft assembly, so that the abrasion between the gasket and the transmission element can be reduced, and the service lives of the gasket and the transmission element are prolonged.

Description

Shaft assembly and transmission

Technical Field

The utility model relates to a derailleur technical field particularly, relates to an axle assembly and derailleur.

Background

The transmission is an important component in an automobile transmission system, and a driver can realize that a vehicle moves at different speeds under different working conditions by engaging different gears of the transmission. If two adjacent gear wheels are closely adjacent and not separated, the end faces of the two adjacent gear wheels are inevitably seriously abraded due to the opposite directions of axial forces and the influence of a set speed ratio and involved motion.

In the existing transmission shaft assembly, a gasket is usually used to separate adjacent gears. For example, two adjacent gear gears are distributed on stepped shafts with different diameters, the two adjacent gears are separated by a stepped shaft blocking shoulder and a gasket, one end of the gasket is tightly attached to one end face of one gear and the stepped shaft blocking shoulder, the other end of the gasket is tightly attached to the other end face of the other gear, and axial limiting of the gasket is achieved through a clamping ring.

However, the spacer and the shaft are not limited in the circumferential direction, so that relative sliding exists between the gear wheel of the gear and the spacer under the action of axial force, abrasion between the spacer and the gear wheel is accelerated, and even a sintering phenomenon can occur.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an axle assembly and derailleur, it can realize radially spacing to the gasket, prevents the relative slip between gasket and the driving medium, reduces wearing and tearing, prevents the sintering phenomenon.

The embodiment of the utility model is realized like this:

in a first aspect, the present embodiment provides an axle assembly, including a transmission shaft and a limiting device disposed on the transmission shaft, where the transmission shaft is used to mount a first transmission member and a second transmission member, and the limiting device is used to limit axial displacement of the first transmission member and the second transmission member;

the limiting device comprises a gasket and a radial limiting part, the gasket is sleeved on the transmission shaft and used for being arranged between the first transmission part and the second transmission part, and the radial limiting part is connected with the gasket to limit the radial displacement of the gasket.

In an optional embodiment, the radial position limiter includes a thrust ring, and the thrust ring is sleeved on the outer circumferential surface of the gasket and is coaxially disposed with the gasket.

In an optional embodiment, the device further comprises a positioning element, wherein one end of the positioning element is connected with the transmission shaft, and the other end of the positioning element is abutted to the radial limiting element.

In an optional embodiment, the transmission shaft is provided with a positioning hole, the positioning element extends into the positioning hole, and the positioning element is connected with the transmission shaft through the positioning hole.

In an optional embodiment, the positioning element is a positioning pin, the positioning pin penetrates through the gasket and is connected with the transmission shaft, and the radial limiting element abuts against one end, far away from the transmission shaft, of the positioning pin.

In an optional embodiment, the gasket includes a first semicircular segment and a second semicircular segment, the first semicircular segment and the second semicircular segment are respectively disposed on two sides of the transmission shaft and clamped between the radial limiting member and the transmission shaft, a gap is formed between the first semicircular segment and the second semicircular segment, and the gap is used for installing the positioning member.

In an alternative embodiment, the transmission shaft is provided with a positioning groove, and the gasket is mounted in the positioning groove.

In an alternative embodiment, a side of the positioning groove close to the first transmission piece forms a first stop surface, and a side of the positioning groove close to the second transmission piece forms a second stop surface; one side of the gasket is abutted with the first stop surface, and the other side of the gasket is abutted with the second stop surface.

In an alternative embodiment, the thickness of the spacer is not less than the thickness of the radial stop.

In a second aspect, this embodiment provides a transmission, which includes the shaft assembly according to any one of the foregoing embodiments, at least one first transmission member and a second transmission member, the first transmission member and the second transmission member are respectively sleeved on the transmission shaft, and the limiting device is disposed between the first transmission member and the second transmission member.

The utility model provides a shaft assembly and derailleur, its beneficial effect is:

the utility model provides a shaft assembly, the gasket cover is established on the transmission shaft, and the gasket is used for setting up between first driving medium and second driving medium, prevents the axial displacement of first driving medium and second driving medium. The radial limiting part is sleeved on the gasket and used for preventing the gasket from moving radially and preventing the gasket from sliding relatively between the first transmission part and the second transmission part, so that abrasion is reduced, the gasket, the first transmission part and the second transmission part are prevented from being sintered, and the service life is prolonged.

The utility model provides a speed changer, including first driving medium, second driving medium and foretell axle assembly, stop device locates between first driving medium and the second driving medium. The radial locating part can restrict the radial displacement of gasket, prevents that gasket and first driving medium, second driving medium from sliding relatively, reduces the wearing and tearing of gasket, first driving medium and second driving medium, avoids the ablation phenomenon, prolongs the life of each spare part.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required 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 schematic structural diagram of a transmission provided in an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at I;

fig. 3 is a sectional view taken along line a-a of fig. 2.

Icon: 110-a drive shaft; 101-a first transmission member; 103-a second transmission member; 061-thrust ring; 062-a shim; 621-a first semicircular segment; 623-a second semicircular segment; 063-locating pins; 064-locating holes; 065-positioning grooves; 066-first stop face; 067-second stop face.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying 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, as 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 accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to 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 present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather 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 present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The transmission is an important component in an automobile transmission system, and a driver can realize that a vehicle moves at different speeds under different working conditions by engaging different gears of the transmission. The transmission shaft gear transmission system mainly comprises an input shaft assembly, an output shaft assembly, a reverse gear shaft assembly and a differential mechanism assembly, and a key part which can enable the transmission to transmit power at a set speed ratio in the shaft assemblies is a gear. In the case of passenger vehicles, the transmission gears are usually helical gears (part of the manual box reverse gear is straight gears), and the helical gears in the shaft assembly inevitably generate axial force in the process of transmitting power due to the helical angle. For two adjacent gear wheels (non-synchronizer separation structure, which means that the gear wheels are separated without transmission parts), when one gear wheel is in gear, the axial force is opposite to the axial force of the other gear wheel which is not in gear, so that mutual extrusion is generated between the two adjacent gear wheels. If two adjacent gear gears are not closely spaced, the end faces of the two adjacent gear gears are inevitably seriously abraded due to the opposite axial force directions and the influence of a set speed ratio and linked motion, and if the difference of the rotating speed is large and the lubrication is insufficient, the two gear gears are sintered together seriously, so that the transmission generates rotating speed and torque fluctuation and even the gear gears are stuck to influence the normal running of a vehicle.

In the existing transmission shaft assembly, the axial limiting structure between two adjacent gears is roughly two: first, spacers are used to separate adjacent gears. For example, two adjacent gear gears are distributed on stepped shafts with different diameters, the two adjacent gears are separated by a stepped shaft blocking shoulder and a gasket, one end of the gasket is tightly attached to one end face of one gear and the stepped shaft blocking shoulder, the other end of the gasket is tightly attached to the other end face of the other gear, and axial limiting of the gasket is achieved through a clamping ring. However, because the spacing between the spacer and the shaft in the circumferential direction is lacked, relative sliding exists between the gear wheel of the gear and the spacer under the action of axial force, so that the abrasion between the spacer and the gear wheel is accelerated, and even a sintering phenomenon can occur.

Secondly, adjacent gear wheels are separated by thrust bearings. The thrust bearings are arranged on the web plates or spokes of two adjacent gear gears and are directly separated by the thrust bearings. Although the thrust bearing can effectively transfer the surface contact friction between the gear end face and the gasket to the bearing roller and bearing raceway surface, the surface contact is converted into point and line contact, the friction loss is reduced, and the problem that the gear end face and the gasket end face in the adjacent gear structure are seriously abraded is effectively solved. However, due to the limitation of the assembly position of the thrust bearing, the axial movement of the bearing and one of the gear gears cannot be limited by adding the snap ring on the end face of the thrust bearing, so that the working strength of the axial limiting devices of other gears is increased, and the failure risk is increased. Meanwhile, due to the axial assembly clearance of the thrust bearing and the accumulation of the axial dimension machining tolerance of each part, the axial crosstalk amount of two adjacent gears is increased, and the NVH (Noise, Vibration, Harshness) performance of the transmission is influenced to a certain extent. In addition, the type selection of the thrust bearing is also influenced by the size structure of the adjacent gear, so that the universality is limited, and the manufacturing cost is high.

In order to overcome prior art's defect, this application has provided a shaft assembly, can effectively restrict the axial displacement between the adjacent fender gear to also can restrict the radial float of gasket, prevent the relative slip between gasket and the fender gear, reduce wearing and tearing, increase of service life.

Referring to fig. 1, the present embodiment provides a transmission, which includes a shaft assembly, at least one first transmission member 101 and one second transmission member 103, wherein the shaft assembly includes a transmission shaft 110 and a limiting device disposed on the transmission shaft 110, the first transmission member 101 and the second transmission member 103 are disposed on the transmission shaft 110, and the limiting device is disposed between the first transmission member 101 and the second transmission member 103 for isolating and preventing the first transmission member 101 and the second transmission member 103 from being worn or ablated. The first transmission member 101 and the second transmission member 103 may be transmission gears, and the transmission may be used in the fields of vehicles, ships, airplanes, engineering machinery, aviation, navigation, and the like, and is not particularly limited herein. In the present embodiment, taking a vehicle transmission as an example, the first transmission member 101 and the second transmission member 103 may include, but are not limited to, gear gears such as helical gears, spur gears, etc., and the number may be one or more.

The shaft assembly comprises a transmission shaft 110 and a limiting device arranged on the transmission shaft 110, wherein the transmission shaft 110 is used for mounting the first transmission piece 101 and the second transmission piece 103, and the limiting device is arranged between the first transmission piece 101 and the second transmission piece 103 and used for limiting the axial displacement of the first transmission piece 101 and the second transmission piece 103. It is readily understood that the transmission has a plurality of gears, i.e. the gear gears comprise a plurality of sets. According to the actual situation, the number of the limiting devices can be one or more, and the limiting devices are respectively arranged between the adjacent gear gears.

Referring to fig. 2 and fig. 3, further, the limiting device includes a spacer 062 and a radial limiting member, the spacer 062 is sleeved on the transmission shaft 110 and is configured to be disposed between the first transmission member 101 and the second transmission member 103, and the radial limiting member is connected with the spacer 062 to limit the radial displacement of the spacer 062. Optionally, the radial limiting part is a thrust ring 061, the thrust ring 061 is of an annular structure, the thrust ring 061 is sleeved on the outer circumferential surface of the spacer 062 and is arranged coaxially with the spacer 062, that is, the inner surface of the thrust ring 061 is attached to or abutted against the outer surface of the spacer 062, so as to prevent the spacer 062 from moving in the radial direction, thereby avoiding abrasion caused by relative sliding between the spacer 062 and the first transmission member 101 or the second transmission member 103.

To achieve a secure connection of the spacer 062, the drive shaft 110 is provided with a detent 065, the spacer 062 being mounted in the detent 065, the detent 065 serving to further limit axial displacement of the spacer 062. Optionally, a side of the positioning groove 065 close to the first transmission piece 101 forms a first stop surface 066, and a side of the positioning groove 065 close to the second transmission piece 103 forms a second stop surface 067; one side of the spacer 062 abuts against the first stop surface 066 and the other side abuts against the second stop surface 067, effectively limiting axial displacement of the spacer 062.

In this embodiment, one end of the positioning element is connected to the transmission shaft 110, and the other end of the positioning element abuts against the radial limiting element, that is, one end of the positioning element away from the transmission shaft 110 abuts against the inner surface of the thrust ring 061. The transmission shaft 110 is provided with a positioning hole 064, the positioning element extends into the positioning hole 064, and the positioning element is connected with the transmission shaft 110 through the positioning hole 064.

In this embodiment, the spacer 062 is of a segmented design. The spacer 062 includes a first semicircular segment 621 and a second semicircular segment 623, the first semicircular segment 621 and the second semicircular segment 623 are respectively disposed at two sides of the transmission shaft 110, approximately enclosing to form a circular ring, and are clamped between the radial limiting member and the transmission shaft 110, a gap is formed between the first semicircular segment 621 and the second semicircular segment 623, and the positioning member is installed at the gap. It is easy to understand that a gap is formed between one end of the first semicircular segment 621 and one end of the second semicircular segment 623, a gap is also formed between the other end of the first semicircular segment 621 and the other end of the second semicircular segment 623, and positioning elements are arranged at the two gaps. Alternatively, the positioning member is a positioning pin 063, and the positioning hole 064 may be provided on the bottom wall of the positioning groove 065. The locating pin 063 stretches into the locating hole 064 of the transmission shaft 110, fixes the gasket 062 on the outer surface of the transmission shaft 110, and the thrust ring 061 abuts against one end of the locating pin 063 far away from the transmission shaft 110, so that the radial displacement of the gasket 062 is further limited, the connection is firmer, and the structure is more reliable.

The gasket 062 is designed in a sectional type, so that the installation is convenient, and the reliability of connection is improved. Of course, without limitation, the multi-segment spacers 062 include, but are not limited to, two, three, four or more segments, and a gap may be formed between each two adjacent segments of spacers 062 for installing the positioning member, provided that the strength and deformation resistance are satisfied. The positions of the transmission shaft 110 corresponding to the gaps formed between two adjacent segments of the spacers 062 are provided with positioning grooves 065, and the positioning grooves 065 may be continuous annular grooves or multi-segment spaced arc-shaped grooves, which are not limited specifically herein.

Alternatively, the thickness of the spacer 062 is not less than the thickness of the radial limiting member, and since the spacer 062 and the thrust ring 061 both adopt an annular structure, the thickness is the length along the radial line of the transmission shaft 110. In order to ensure that most of the axial force is borne by the gasket 062, the thrust ring 061 is mainly used for restraining radial stress of the gasket 062, the thickness of the gasket 062 is set to be not less than that of a radial limiting piece, namely the thrust ring 061, so that most of the axial force from the first transmission piece 101 or the second transmission piece 103 can act on the gasket 062, the abrasion of the thrust ring 061 is reduced, and the service life of the thrust ring 061 is prolonged.

The embodiment provides an axle assembly and derailleur, and its specific theory of operation is as follows:

the spacer 062 is mounted in the positioning groove 065 of the transmission shaft 110 and is located between the first transmission member 101 and the second transmission member 103, the first stop surface 066 of the positioning groove 065 limiting leftward axial play of the spacer 062 when subjected to a leftward axial force, and the second stop surface 067 limiting rightward axial play of the spacer 062 when subjected to a rightward axial force. The thrust ring 061 is sleeved on the outer circumference of the spacer 062, namely, the outer edge of the spacer 062 is radially restrained by the thrust ring 061, and the thrust ring 061 effectively limits the spacer 062 to be separated from the positioning groove 065 under the centrifugal action. The locating pin 063 extends into the locating hole 064 on the transmission shaft 110 to fix the gasket 062 on the transmission shaft 110, and limits the circumferential rotation of the gasket 062 relative to the transmission shaft 110; and the end of the locating pin 063 remote from the drive shaft 110 abuts the thrust ring 061 and is constrained by the inner surface of the thrust ring 061. Thus, the positioning pin 063 effectively prevents the relative rotation of the spacer 062 and the transmission shaft 110 under the combined action of the positioning hole 064 and the thrust ring 061, so that the spacer 062 always keeps the same rotating speed as the transmission shaft 110. In addition, since the thickness of the thrust ring 061 is slightly smaller than that of the spacer 062, the spacer 062 is more effective in bearing the axial force of the first transmission member 101 and the second transmission member 103.

The first transmission member 101 is exemplified by a fourth-speed gear, the second transmission member 103 is exemplified by a fifth-speed gear, and fig. 1 defaults to a transmission forward-towing condition, and the transmission shaft 110 rotates clockwise when viewed from right to left. When the four-gear is in gear shifting, the axial force of the four-gear driving gear is leftward, and the gasket 062 bears the leftward axial force of the four-gear driving gear. Because the gasket 062 realizes its axial spacing through constant head tank 065 on the transmission shaft 110, the axial cluster that four keep off the driving gear has been retrained to first backstop face 066, locating pin 063 has restricted the relative transmission shaft 110's of gasket 062 circumference rotation, thrust ring 061 is used for preventing that gasket 062 breaks away from constant head tank 065 because of centrifugal force, do not have relative sliding friction between four keep off the driving gear and gasket 062, reduced gasket 062 and four keep off driving gear side wearing and tearing, avoided the ablation of fender gear terminal surface, promoted the whole life of derailleur.

When the four-gear is in gear shifting, the gasket 062 is subjected to axial force from the four-gear driving gear to the left, the gasket 062 is installed in the positioning groove 065, the stressed part of the gasket 062 is the upper half part of the gasket 062, the axial force fulcrum is located in the middle of the positioning groove 065, the force arm is short, the deflection deformation of the gasket 062 is small, the working strength of the gasket 062 is reduced, the gasket 062 is not prone to failure, and the service life of the gasket 062 is prolonged. It is easy to understand, if adopt among the prior art at shaft shoulder department installation gasket, then the gasket stress point is upper portion, and spacing fulcrum is located the gasket root, and there is great difference in height in stress point and spacing point, and the gasket under this structure is similar cantilever structure, and the arm of force is longer relatively, leads to gasket amount of deflection to warp great, the easy inefficacy. In addition, set up the shaft shoulder on the axle, when a plurality of gear wheel, have a plurality of shaft shoulders on the axle, lead to the external diameter of axle to reduce gradually, the biggest minimum department difference of shaft diameter is great, can weaken the whole torsional rigidity of axle, makes the torsion angle increase under the same moment of torsion operating mode. And set up constant head tank 065 on transmission shaft 110 in this embodiment and carry out axial spacing, the change of shaft diameter is little, and is less to the holistic torsional rigidity influence of transmission shaft 110, can also shorten gasket 062's the atress arm of force simultaneously, is favorable to reducing gasket 062 working strength.

Next, the positioning groove 065, the first stop surface 066, and the second stop surface 067 are formed on the transmission shaft 110 by machining. The washer 062, the thrust ring 061 and the locating pin 063 are newly added machining parts and can be machined and formed by matching with the structure of the transmission shaft 110. Therefore, the shaft assembly structure has the characteristics of low manufacturing difficulty, low processing cost, high applicability and high universality.

To sum up, the embodiment of the utility model provides an axle assembly and derailleur have the beneficial effect of following several aspects:

this axle assembly realizes gasket 062 axially spacing through set up constant head tank 065 on transmission shaft 110, prevents the wearing and tearing of two adjacent fender gear, shortens gasket 062's the atress arm of force simultaneously, and gasket 062 non-deformable improves gasket 062's working strength, improves gasket 062 life. The locating pin 063 prevents the washer 062 from rotating around the transmission shaft 110, so that the washer 062 and the transmission shaft 110 always keep the same rotating speed, and the thrust ring 061 prevents the washer 062 from disengaging from the locating slot 065, so that relative sliding friction does not exist between the gear wheel and the washer 062. The side abrasion between the gasket 062 and the gear is reduced, the ablation of the end face of the gear is avoided, and the whole service life of the transmission is prolonged. Finally, the shaft assembly and the transmission are low in manufacturing difficulty, low in processing cost, high in applicability and universality.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by 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. The shaft assembly is characterized by comprising a transmission shaft and a limiting device arranged on the transmission shaft, wherein the transmission shaft is used for mounting a first transmission piece and a second transmission piece, and the limiting device is used for limiting the axial displacement of the first transmission piece and the second transmission piece;

2. The shaft assembly of claim 1, wherein the radial stop comprises a thrust ring disposed around the outer periphery of the spacer and coaxially disposed with the spacer.

3. The shaft assembly of claim 1, further comprising a positioning member, wherein one end of the positioning member is connected to the transmission shaft and the other end of the positioning member abuts against the radial stop member.

4. The shaft assembly of claim 3, wherein the drive shaft defines a locating hole, and wherein the positioning member extends into the locating hole and is coupled to the drive shaft through the locating hole.

5. The shaft assembly according to claim 3, wherein the positioning member is a positioning pin, the positioning pin passes through the gasket and is connected with the transmission shaft, and the radial position-limiting member abuts against one end of the positioning pin, which is far away from the transmission shaft.

6. The shaft assembly according to claim 3, wherein the spacer includes a first semicircular segment and a second semicircular segment, the first semicircular segment and the second semicircular segment are respectively disposed on two sides of the transmission shaft and clamped between the radial position limiting member and the transmission shaft, a gap is formed between the first semicircular segment and the second semicircular segment, and the gap is used for mounting the positioning member.

7. The shaft assembly of claim 1 wherein said drive shaft defines a detent, said spacer being mounted in said detent.

8. The shaft assembly of claim 7, wherein a side of the positioning slot adjacent the first transmission member forms a first stop surface and a side of the positioning slot adjacent the second transmission member forms a second stop surface; one side of the gasket is abutted with the first stop surface, and the other side of the gasket is abutted with the second stop surface.

9. The shaft assembly according to any one of claims 1 to 8, wherein the spacer has a thickness not less than a thickness of the radial stop.

10. A transmission comprising a shaft assembly according to any one of claims 1 to 9, at least one first transmission member and a second transmission member, the first transmission member and the second transmission member being respectively fitted over the drive shaft, the limiting device being provided between the first transmission member and the second transmission member.