CN220622666U - Vehicle transmission mechanism and vehicle - Google Patents

Abstract

The vehicle transmission mechanism is used for a vehicle and comprises a rotating shaft, a first bearing and a first limiting piece, wherein the rotating shaft comprises a first end; the first bearing comprises a first inner ring, and the first inner ring part is sleeved at the first end; a first groove is formed in the first end face of the first inner ring protruding out of the first end, and the inner wall face of the first groove is connected with the first end face and the inner peripheral wall face of the first inner ring; the first limiting piece is fixedly connected with the first end, protrudes out of the outer peripheral surface of the first end and stretches into the first groove, and the first limiting piece is abutted with the inner wall surface of the first groove in the axial direction of the rotating shaft. Under the very narrow condition in space, the first limiting piece still can be installed, the limiting effect on the axial direction of the first bearing is guaranteed, the vehicle transmission mechanism is arranged in a limited space, and the space requirement is better met.

Description

Vehicle transmission mechanism and vehicle

Technical Field

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

Background

The automobile industry in China has been developed for many years, becomes a prop industry for improving the whole economical strength of China, plays an important role in pulling economic growth, increasing employment, increasing financial tax and the like, and is also a key factor for transformation and upgrading of the industrial structure in China.

The power of the vehicle is generally transmitted to a differential through a rotating shaft, and the differential sequentially transmits the power to a transmission half shaft and a hub so as to drive the vehicle to run. The power transmission process involves the installation problem of the bearing on the rotating shaft.

The bearing is mainly connected with the end face of the rotating shaft through the bolt when being arranged at the end of the rotating shaft, and the bearing is axially limited through the abutting joint of the bolt and the end face of the bearing, so that the installation position of the bolt is required to be increased outside the end face of the bearing, the whole vehicle transmission mechanism is required to be longer in axial length, and the vehicle transmission mechanism is not beneficial to being arranged in a limited space.

Disclosure of Invention

The utility model aims to provide a vehicle transmission mechanism and a vehicle, which solve the problem that the vehicle transmission mechanism needs a longer axial length and is not beneficial to arranging transmission components in a limited space.

In order to achieve the purpose of the utility model, the utility model provides the following technical scheme:

in a first aspect, the present utility model provides a vehicle transmission comprising a shaft, the shaft comprising a first end; the first bearing comprises a first inner ring, and the first inner ring part is sleeved at the first end; a first groove is formed in the first end face of the first inner ring protruding out of the first end, and the inner wall face of the first groove is connected with the first end face and the inner peripheral wall face of the first inner ring; the first limiting piece is fixedly connected with the first end, protrudes out of the outer peripheral surface of the first end and stretches into the first groove, and the first limiting piece is in butt joint with the inner wall surface of the first groove in the axial direction of the rotating shaft.

In one embodiment, the first groove extends along the circumferential direction of the first inner ring and is communicated with the first inner ring from the beginning to the end; the first limiting piece comprises a connecting part and a protruding part, the protruding part is connected to the circumferential direction of the connecting part, the connecting part is connected with the rotating shaft, and the protruding part stretches into the first groove and is abutted to the inner wall surface of the first groove in the axial direction of the rotating shaft; the convex part is annular; alternatively, the protruding portions are plural and are distributed at intervals in the circumferential direction of the connecting portion.

In one embodiment, the vehicle transmission mechanism further comprises a housing, the first bearing further comprises a first outer ring, and the first outer ring is sleeved on the first inner ring; the first outer ring comprises a third end face, the third end face corresponds to the first end face, and the third end face and the outer peripheral surface of the first outer ring are in abutting connection with the shell.

In one embodiment, the first outer ring further comprises a fourth end surface opposite to the third end surface, the fourth end surface is provided with a second groove, and the inner wall surface of the second groove is connected with the fourth end surface and the outer peripheral surface of the first outer ring; the vehicle transmission mechanism further comprises a second limiting piece, wherein the second limiting piece is connected with the shell and stretches into the second groove; the second limiting piece is abutted with the inner wall surface of the second groove in the axial direction of the rotating shaft.

In one embodiment, the second groove extends along the circumferential direction of the first outer ring and is communicated with the first outer ring in an end-to-end manner, and the second limiting pieces are annular, or the second limiting pieces are multiple and are arranged at intervals along the circumferential direction of the first outer ring; or the second grooves are formed in a plurality of positions at intervals along the circumferential direction of the first outer ring, and the second limiting parts are formed in a plurality of positions and correspondingly extend into the second grooves one by one.

In one embodiment, the vehicle transmission mechanism further comprises a third limiting part, the third limiting part is sleeved on the rotating shaft and is fixed relative to the rotating shaft in the circumferential direction and the axial direction, the first inner ring is provided with a second end face opposite to the first end face, and the second end face is abutted to the third limiting part.

In one embodiment, the bearing further comprises a second bearing comprising a second inner race; the rotating shaft also comprises a second end opposite to the first end; the second inner ring is located at the second end and arranged on the outer peripheral surface of the rotating shaft, and the second inner ring and the rotating shaft are of an integrated structure.

In one embodiment, the second bearing further comprises a second outer ring sleeved on the second inner ring, and the second outer ring is connected with the housing.

In one embodiment, an end surface of the first limiting member facing away from the second bearing is flush with the first end surface, and/or an end surface of the second inner ring facing away from the first bearing is flush with an end surface of the second end.

In a second aspect, the present utility model also provides a vehicle comprising a vehicle transmission mechanism according to any of the various embodiments of the first aspect.

By arranging the first groove on the first end face of the first inner ring, the first limiting piece stretches into the first groove to be in axial abutting connection with the inner wall face of the first groove, so that the first bearing and the rotating shaft are fixed in the axial direction.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from them without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of a vehicle transmission of an embodiment.

Reference numerals illustrate:

100-vehicle transmission;

10-rotating shafts, 11-first ends, 111-axes, 12-mounting holes, 13-structure holes, 14-spokes, 15-second ends, 16-first sections, 17-second sections, 18-third sections and 19-shoulders;

20-a first bearing, 21-a first inner ring, 211-a first end face, 212-a second end face, 22-a first groove, 221-a first face, 222-a second face, 23-a first outer ring, 231-a third end face, 232-a fourth end face, 24-a second groove, 25-a first rolling element;

30-a first limiting piece, 31-a mounting hole, 32-a connecting part and 33-a protruding part;

40-housing, 41-first dashed line, 42-second dashed line;

50-a second limiting piece, 51-an extending part, 52-a fixing part and 53-a fixing hole;

60-a third limiting piece;

70-transmission assembly, 71-transmission gear, 72-clutch, 73-transmission inner race, 731-clutch portion, 732-extension, 74-first fixed bearing, 75-second fixed bearing;

80-second bearing, 81-second inner ring, 82-second outer ring, 83-second rolling element.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Some embodiments of the present utility model are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.

Referring to fig. 1, an embodiment of the present utility model provides a vehicle including a vehicle transmission mechanism 100 according to an embodiment of the present utility model. The vehicle can be a fuel oil automobile, an electric automobile or a fuel oil and electric hybrid automobile. The vehicle transmission mechanism 100 in the embodiment of the utility model is applied to a transmission system of a vehicle, and power is sequentially transmitted to a hub through a power source (such as an engine or a motor, etc.), a transmission main shaft, the vehicle transmission mechanism 100 in the embodiment of the utility model, a differential and a transmission half shaft so as to drive the vehicle to run. The vehicle adopts the vehicle transmission mechanism 100 in the embodiment of the utility model, reduces the axial length of the vehicle transmission mechanism 100, is beneficial to arranging the vehicle transmission mechanism 100 in a limited space, better meets the space requirement, and simultaneously prevents the problems of abnormal sound, bearing heating damage and the like caused by axial limit failure of the bearing in high-speed operation.

Referring to fig. 1, an embodiment of the present utility model provides a vehicle transmission mechanism 100, which includes a rotating shaft 10, a first bearing 20 and a first limiting member 30.

The rotating shaft 10 is used for transmitting power, and the rotating shaft 10 can be a transmission auxiliary shaft of a vehicle, is used for being in transmission connection with a transmission main shaft and a differential mechanism, and is used for transmitting the power of the transmission main shaft to the differential mechanism. The shaft 10 extends generally along a straight line and includes a first end 11 and a second end 15. The shaft 10 may be rotationally symmetrical about the axis 111 and the shaft 10 may be circular in cross-section at the first and second ends 11, 15.

Optionally, the end surface of the first end 11 of the rotating shaft 10 is provided with an installation hole 12 extending along the axial direction, the axis of the installation hole 12 coincides with the axis 111 of the rotating shaft 10, and the first limiting piece 30 is connected with the installation hole 12 in a matching way. Specifically, the fixing manner of the mounting hole 12 and the first limiting member 30 may be screw connection, clamping connection, welding, adhesion, magnetic attraction, and the like, which is not limited. Taking the threaded connection as an example, the mounting hole 12 is a screw hole and is provided with an internal thread, the first limiting piece 30 is provided with an external thread, and the external thread of the first limiting piece 30 is screwed into the internal thread of the mounting hole 12 to realize connection and fixation.

Optionally, the rotating shaft 10 is provided with a structural hole 13 extending along the axial direction, and the axis of the structural hole 13 coincides with the axis 111 of the rotating shaft 10. The diameter of the structural hole 13 may be 1/5 to 1/2 of the diameter of the first end 11, specifically, may be 1/5, 1/4, 1/3, 1/2, etc., without limitation. The structural hole 13 may communicate with the mounting hole 12, and the structural hole 13 may penetrate the end surface of the second end 15 without limitation.

By providing the structural holes 13 on the rotary shaft 10, the weight of the rotary shaft 10 is reduced while maintaining sufficient structural strength of the rotary shaft 10, and the cost is saved.

Alternatively, chamfering is performed between both end surfaces of the rotary shaft 10 and the outer peripheral surface of the rotary shaft 10. Optionally, chamfering is adopted between the end face of the first end 11 of the rotating shaft 10 and the inner wall of the mounting hole 12. Optionally, a chamfering treatment is adopted between the end face of the second end 15 and the inner wall of the structural hole 13.

By chamfering, the chamfer has a guiding function, so that the first bearing 20 and the first stopper 30 are conveniently sleeved and inserted into the mounting hole 12. The peripheral outline of the chamfered rotating shaft 10 is smooth, so that sharp corners are prevented from scratching parts such as the first bearing 20 during installation.

The first bearing 20 includes a first inner ring 21, a first outer ring 23, and a first rolling element 25, the first outer ring 23 is sleeved on the first inner ring 21, and the first rolling element 25 is located between the first outer ring 23 and the first inner ring 21. The first inner ring 21 is partially sleeved on the first end 11, and the rest part of the first inner ring protrudes out of the end face of the first end 11.

The first inner ring 21 includes a first end surface 211 and a second end surface 212 which are axially opposite to each other, the first end surface 211 protrudes from the end surface of the first end 11, the first end surface 211 is provided with a first groove 22, and an inner wall surface of the first groove 22 is connected to the first end surface 211 and an inner peripheral wall surface of the first inner ring 21.

Optionally, the inner diameter of the first inner ring 21 is slightly smaller than the outer diameter of the first end 11, and the first inner ring 21 and the rotating shaft 10 implement interference fit, so that the first inner ring 21 and the rotating shaft 10 are fixed in the circumferential direction.

Alternatively, the ratio of the radial depth of the first groove 22 to the thickness of the first inner ring 21 (i.e., the distance between the inner peripheral surface and the outer peripheral surface of the first inner ring 21) may be 1/5 to 1/2, specifically may be 1/5, 1/4, 1/3, 1/2, etc., without limitation. When the ratio is greater than 1/2, the first inner race 21 is insufficient in structural strength and is easily damaged in rotation; when the ratio is less than 1/5, the contact area between the first stopper 30 and the second surface 222 is too small, resulting in insufficient axial restriction of the first stopper 30 to the first bearing 20.

Alternatively, the ratio of the axial depth of the first groove 22 to the width of the first inner ring 21 (i.e., the distance between the first end surface 211 and the second end surface 212) may be 1/8-1/3, specifically, may be 1/8, 1/7, 1/6, 1/5, 1/4, 1/3, etc., without limitation. When the ratio is greater than 1/3, the first inner race 21 is insufficient in structural strength and is easily damaged in rotation; when the ratio is less than 1/8, the distance of the first limiting member accommodated in the first groove 22 is too small to effectively reduce the axial dimension. The first groove 22 having such a size is provided, and the first stopper 30 can be effectively accommodated to reduce the axial size on the basis of ensuring the structural strength of the first inner ring 21.

Alternatively, the first rolling member 25 may be a ball, a roller, or the like, without limitation. Alternatively, the first bearing 20 is made of a metal material with high structural strength, specifically, aluminum alloy, magnesium alloy, iron alloy, and the like, without limitation. Alternatively, the first inner ring 21, the first outer ring 23, and the first rolling element 25 may be made of the same material, or may be made of different materials. Alternatively, the structural strength of the first rolling members 25 may be greater than the structural strength of the first inner race 21 and the first outer race 23.

The first limiting piece 30 is fixedly connected with the first end 11, protrudes out of the outer circumferential surface of the first end 11 and stretches into the first groove 22, and the first limiting piece 30 is abutted with the inner wall surface of the first groove 22 in the axial direction of the rotating shaft 10.

Optionally, the first limiting member 30 includes a fitting hole 31, and the fitting hole 31 extends along an axial direction of the first limiting member 30, is fitted into the fitting hole 31 by an installation tool (e.g., a wrench or the like), and is fixed relative to the first limiting member 30 in a circumferential direction and an axial direction, so as to install and detach the first limiting member 30.

Alternatively, the cross-section of the fitting hole 31 may be non-circular, and may be elliptical or polygonal, without limitation. Optionally, a chamfering treatment is adopted between the inner wall of the assembly hole 31 and the end face of the first end 11, so that the installation tool can conveniently extend into the assembly hole 31.

Alternatively, the inner wall surface of the first groove 22 includes a first surface 221 and a second surface 222 perpendicular to each other, the first surface 221 is connected to the first end surface 211 and perpendicular to the first end surface, and the second surface 222 is perpendicular to the inner peripheral wall surface of the first inner ring 21. The first stopper 30 may radially abut against the first surface 221 or may have a gap, and the first stopper 30 may axially abut against the second surface 222. The first limiting member 30 has a simple structure, and does not need to have a complicated structure (for example, when the included angle between the second surface 222 and the inner circumferential wall surface of the first inner ring 21 is greater than 90 °, a corresponding spline is required to be formed on the first limiting member 30 to match the first groove 22), which is low in cost.

Optionally, the first limiting member 30 is made of a metal material with high structural strength and easy to process, and may be, without limitation, aluminum alloy, magnesium alloy, iron alloy, spring steel, etc. Optionally, the surface of the first limiting member 30 is subjected to rust-proof treatment, so as to improve the durability of the first limiting member 30, and specifically, the surface may be blackened rust-proof treatment, attached protective coating, etc., without limitation.

The current vehicle pursues a compact layout of parts, and as shown in fig. 1, the first broken line 41 shows the position of the inner wall of one side of the housing 40, the space between the first broken line 41 and the first end surface 211 is already very narrow, and there is not enough space to arrange the first stopper 30 for direct abutment with the first end surface 211, resulting in loss of the stopper effect of the first bearing 20 in the axial direction.

According to the vehicle transmission mechanism 100 in the embodiment of the utility model, the first groove 22 is formed in the first end surface 211 of the first inner ring 21, the first limiting piece 30 extends into the first groove 22 and is in axial abutting connection with the inner wall surface of the first groove 22, so that the first bearing 20 and the rotating shaft 10 are fixed in the axial direction.

It should be understood that the position of the first broken line 41 shown in fig. 1 may also have a relatively large distance from the first end surface 211, i.e. the first stop 30 may still be axially embedded in the first bearing 20 using the solution of the utility model in case of a sufficient space between the inner wall of the housing 40 and the first end surface 211.

Referring to fig. 1, the first groove 22 extends in the circumferential direction of the first inner ring 21 and communicates end to end; the first stopper 30 includes a connecting portion 32 and a protruding portion 33, the protruding portion 33 is connected in the circumferential direction of the connecting portion 32, the connecting portion 32 is connected with the rotating shaft 10, the protruding portion 33 extends into the first groove 22 and abuts against the inner wall surface of the first groove 22 in the axial direction of the rotating shaft 10; the protruding portion 33 is annular; alternatively, the protruding portions 33 are plural and are distributed at intervals in the circumferential direction of the connecting portion 32.

Alternatively, the ratio of the depth of the connecting portion 32 inserted into the shaft 10 to the length of the shaft 10 may be 1/8-1/4, specifically 1/8, 1/7, 1/6, 1/5, 1/4, etc., without limitation.

Alternatively, the ratio of the height of the protruding portion 33 protruding from the outer peripheral surface of the first end 11 to the length of the first end surface 211 may be 1/5-1/2, specifically 1/5, 1/4, 1/3, 1/2, etc., without limitation. When the ratio is greater than 1/2, the radial depth of the first groove 22 is too large, resulting in insufficient structural strength of the first inner ring 21 and easy damage in rotation; when the ratio is less than 1/5, the contact area between the first stopper 30 and the second surface 222 is too small, resulting in insufficient axial restriction of the first stopper 30 to the first bearing 20.

Optionally, the height of the protruding portion 33 protruding from the outer peripheral surface of the first end 11 may be slightly smaller than or equal to the radial depth of the first groove 22, so as to facilitate the first limiting member 30 being accommodated in the first groove 22.

Alternatively, the ratio of the axial length of the protruding portion 33 to the axial length of the first inner ring 21 may be 1/8-1/3, specifically, may be 1/8, 1/7, 1/6, 1/5, 1/4, 1/3, etc., without limitation. When the ratio is greater than 1/3, the axial depth of the first groove 22 is too large, resulting in insufficient structural strength of the first inner ring 21 and easy damage in rotation; when the ratio is less than 1/8, the structural strength of the protruding part is insufficient, and the risk of damage exists in the transmission process, so that the axial limit failure is caused.

Alternatively, the protruding portion 33 may be one annular step, or may be a plurality of steps equally spaced in the circumferential direction of the connecting portion 32.

Alternatively, the ratio of the radial dimension of the fitting hole 31 to the diameter of the connecting portion 32 may be 1/4-1/2, specifically 1/4, 1/3, 1/2, etc., without limitation.

By providing the connecting portion 32 and the protruding portion 33 on the first stopper 30, the first stopper 30 is connected with the rotating shaft 10 through the connecting portion 32 and fixed in the axial direction of the rotating shaft 10, and the protruding portion 33 extends into the first groove 22 and abuts against the inner wall surface of the first groove 22 in the axial direction of the rotating shaft 10, so that the first inner ring 21 is fixed in the axial direction of the rotating shaft 10.

Referring to fig. 1, the vehicle transmission 100 further includes a housing 40; the first outer race 23 includes third and fourth opposite end faces 231, 232; the third end surface 231 corresponds to the first end surface 211, and the third end surface 231 and the outer peripheral surface of the first outer race 23 are both abutted against the housing 40.

Alternatively, the diameter of the outer peripheral surface of the first outer ring 23 is slightly larger than the inner diameter of the corresponding part of the housing 40, and the first outer ring 23 and the housing 40 are in interference fit, so that the first outer ring 23 and the housing 40 are fixed in the circumferential direction.

By providing the first outer ring 23 to be connected with the housing 40, the first outer ring 23 and the housing 40 are fixed in the circumferential direction, and at the same time, the rotary shaft 10 and the first bearing 20 are fixed in the radial direction of the housing 40 and in the axial direction toward the third end surface 231.

Referring to fig. 1, the fourth end surface 232 is provided with a second groove 24, and an inner wall surface of the second groove 24 is connected to the fourth end surface 232 and an outer peripheral surface of the first outer ring 23; the vehicle transmission mechanism 100 further includes a second limiting member 50, where the second limiting member 50 is connected with the housing 40 and extends into the second groove 24, and the second limiting member 50 abuts against an inner wall surface of the second groove 24 in an axial direction of the rotating shaft 10.

Optionally, the structure of the second groove 24 is similar to that of the first groove 22, and will not be described again.

Alternatively, the second limiting member 50 includes an extending portion 51 and a fixing portion 52, the extending portion 51 is connected to the outer periphery of the fixing portion 52, the extending portion 51 extends into the second groove 24 and abuts against an inner wall surface of the second groove 24 in the axial direction of the rotating shaft 10, and the fixing portion 52 is connected to the housing 40.

Optionally, the fixing portion 52 is provided with a fixing hole 53 that is opened toward the third end surface 231 along the axial direction, and the fixing hole 53 and the housing 40 may be fixed by screwing, clamping, or the like, without limitation. Alternatively, the fixing hole 53 may penetrate the fixing portion 52.

Alternatively, the ratio of the diameter of the fixing hole 53 to the radial dimension of the fixing portion 52 may be 1/4-1/2, specifically 1/4, 1/3, 1/2, etc., without limitation. When the ratio is more than 1/2, the structural strength of the fixed part is insufficient and is easy to damage in the transmission process; when the ratio is less than 1/4, the strength of the connection between the second limiting member 50 and the housing 40 is too small, and the second limiting member 50 is easy to separate from the housing 40, so that the axial limiting failure is caused.

By providing the second groove 24 and the second stopper 50, the rotary shaft 10, the first bearing 20, and the housing 40 are fixed in the axial direction of the rotary shaft 10; meanwhile, the distance that the second limiting piece 50 protrudes out of the fourth end face 232 is shortened, the axial length of the vehicle transmission mechanism 100 is reduced, the vehicle transmission mechanism 100 is arranged in a limited space, and the space requirement is better met.

Referring to fig. 1, the second grooves 24 extend along the circumferential direction of the first outer ring 23 and are communicated end to end, and the second limiting members 50 are annular, or the second limiting members 50 are plural and are arranged at intervals along the circumferential direction of the first outer ring 23; alternatively, the second grooves 24 are plural and are arranged at intervals along the circumferential direction of the first outer ring 23, and the second limiting members 50 are plural and extend into the plural second grooves 24 in a one-to-one correspondence manner.

Alternatively, the second limiting member 50 may be an integral structure, and the second limiting member 50 is ring-shaped and provided with a plurality of fixing holes 53 in a circumferential direction for connection with the housing 40.

Alternatively, the second limiting member 50 may be a plurality of second limiting members and may be formed in an annular shape by being connected end to end, and the specific number may be 2, 3, 4, 5, etc., without limitation.

Alternatively, the fixing holes 53 are provided in plurality and equally spaced in the circumferential direction of the second stopper 50. Alternatively, the number of the fixing holes 53 may be 2, 3, 4, 5, etc., without limitation. When the number of the fixing holes 53 is less than 2, the strength of the connection between the second limiting member 50 and the housing 40 is too small, and the second limiting member 50 is easy to be separated from the housing 40, so that the axial limiting failure is caused.

Alternatively, the second grooves 24 may be plural and provided at equal intervals in the circumferential direction of the first outer race 23, and the number of the second grooves 24 may be 2, 3, 4, 5, etc., without limitation. When the number of the second grooves 24 is less than 2, the strength of the connection between the second limiting member 50 and the housing 40 is too small, and the second limiting member 50 is easy to be separated from the housing 40, so that the axial limiting failure is caused.

By arranging the second grooves 24 to be annular or arranging the second grooves 24 to be multiple, different installation modes can be selected under different installation environments, so that the second limiting piece 50 and the shell 40 can be conveniently installed in an effective space.

Referring to fig. 1, the rotating shaft 10 is provided with a first section 16, a second section 17 and a third section 18, which are sequentially connected in the axial direction, the vehicle transmission mechanism 100 further includes a third limiting member 60, the third limiting member 60 is located at the first section 16 and sleeved on the rotating shaft 10, and is fixed relatively to the rotating shaft 10 in the circumferential direction and the axial direction, and the third limiting member 60 abuts against the second end surface 212.

Optionally, the second section 17 includes shoulders 19 protruding from the outer peripheral surfaces of the first and third sections 16, 18.

Optionally, the shaft 10 further includes spokes 14, the spokes 14 being located on shoulders 19 and adapted to connect with other components of the vehicle to transmit power.

Optionally, the vehicle transmission mechanism 100 further includes a transmission assembly 70, where the transmission assembly 70 is sleeved on the rotating shaft 10 and is respectively abutted to the third limiting member 60 and the shaft shoulder 19, and the transmission assembly 70 is fixed in the axial direction of the rotating shaft 10.

Optionally, the transmission assembly 70 includes a transmission gear 71, a clutch 72, and a transmission inner race 73; the transmission inner ring 73 is positioned on the first section 16 and sleeved on the rotating shaft 10, and is respectively abutted against the third limiting piece 60 and the shaft shoulder 19, and the transmission inner ring 73 is fixed in the circumferential direction and the axial direction of the rotating shaft 10; the transmission gear 71 is sleeved on the transmission inner ring 73 and is fixed on the axial direction and the radial direction of the transmission inner ring 73; the clutch 72 is disposed between the transmission gear 71 and the transmission inner race.

Optionally, the inner driving ring 73 includes a clutch portion 731 and an extension portion 732, where the clutch portion 731 is configured to be connected to the clutch 72, and the extension portion 732 is configured to abut against the third limiting member 60.

Optionally, the transmission assembly 70 further includes a first fixed bearing 74, the inner ring of the first fixed bearing 74 is sleeved on the extension 732 and abuts against the third limiting member 60, the inner ring of the first fixed bearing 74 and the transmission inner ring 73 are fixed in the circumferential direction and the axial direction, and the outer ring of the first fixed bearing 74 is connected with the transmission gear 71 and fixed in the circumferential direction.

The first fixed bearing 74 is axially opposite to the first bearing 20, and the gap between the first fixed bearing and the first fixed bearing is small, and the second stopper 50 is inserted into the second groove 24 to abut against the first outer ring 23 by providing the second groove 24, so that the second stopper 50 can be mounted even when the space between the first bearing 20 and the first fixed bearing 74 is narrow.

If the second limiter 50 is directly abutted against the fourth end face 232, the space required between the first bearing 20 and the first fixed bearing 74 is large, which results in the vehicle transmission mechanism 100 requiring a larger axial length than the second limiter 50 of the present utility model is embedded in the first outer race 23.

Optionally, the transmission assembly 70 further includes a second fixed bearing 75, an inner ring of the second fixed bearing 75 is located on the second section 17 and sleeved on the shaft shoulder 19, and is respectively abutted against the transmission inner ring 73 and the spoke 14, the inner ring of the second fixed bearing 75 is fixed in the circumferential direction and the axial direction of the rotating shaft 10, and an outer ring of the second fixed bearing 75 is connected with the transmission gear 71 and is fixed in the circumferential direction.

Alternatively, when the clutch 72 is in communication, the transmission gear 71 is fixed with the transmission inner race 73 in the circumferential direction, and power is transmitted from the transmission gear 71 to the rotating shaft 10; when the clutch 72 is disengaged, the transmission gear 71 rotates relative to the transmission inner race 73, and the rotary shaft 10 rotates relative to the transmission gear 71.

By providing the transmission assembly 70, power can be transmitted to the rotary shaft 10 through the transmission gear 71, and the state of transmission can be controlled according to the power demand.

Optionally, the diameter of the inner wall surface of the third limiting member 60 may be slightly smaller than the outer diameter of the first section 16, and the third limiting member 60 and the rotating shaft 10 implement an interference fit, so that the third limiting member 60 and the rotating shaft 10 are fixed in the circumferential direction.

Alternatively, the outer wall surface diameter of the third stopper 60 is larger than the outer wall surface diameter of the extension 732, smaller than the thickness of the first inner ring 21 (i.e., the distance between the inner peripheral surface and the outer peripheral surface of the first inner ring 21) and smaller than the thickness of the inner ring of the first fixed bearing 74 (i.e., the distance between the inner peripheral surface and the outer peripheral surface of the inner ring of the first fixed bearing 74).

Optionally, the first bearing 20 is spaced from the drive assembly 70 by a distance that meets space requirements.

By arranging the third limiting member 60, the first bearing 20 and the transmission assembly 70 have a spacing distance without contact, and when transmission starts, relative sliding between the first bearing 20 and the transmission assembly 70 can not occur, and abnormal sound can not be generated.

Referring to fig. 1, the vehicle transmission mechanism 100 further includes a second bearing 80, the second bearing 80 includes a second inner ring 81, a second outer ring 82, and a second rolling member 83, the second outer ring 82 is sleeved on the second inner ring 81, and the second rolling member 83 is disposed between the second outer ring 82 and the second inner ring 81. The second inner ring 81 is located at the second end 15 and disposed on the outer peripheral surface of the rotating shaft 10, and the second inner ring 81 and the rotating shaft 10 are in an integrated structure.

Optionally, a second inner race 81 is positioned in the third section 18 and is coupled to the shoulder 19.

Optionally, the second inner ring 81 is made of a material similar to that of the assembly of the rotating shaft 10, and will not be described in detail. Alternatively, the second rolling member 83 may be a ball, a roller, or the like, without limitation. Optionally, the materials used for the second outer ring 82 and the second rolling element 83 are similar to those used for the first bearing 20 and the first rolling element 25, and will not be described in detail.

As shown in fig. 1, the second broken line 42 shows the position of the other side inner wall of the housing 40, the space between the second broken line 42 and the end face of the second end 15 is already very narrow, there is insufficient space for extending the rotary shaft 10 to the outer end face protruding from the second bearing 80, and a stopper structure such as a retainer ring for abutting against the outer end face of the second bearing 80 is provided on the outer peripheral surface of the rotary shaft 10.

Through setting up second inner race 81 and pivot 10 as an organic whole structure, compare in the length of extension second end 15 with the outside terminal surface of protrusion second bearing 80 and set up limit structure and the outside terminal surface butt of second bearing 80, reduced the axial length of vehicle drive mechanism 100, be favorable to arranging vehicle drive mechanism 100 in limited space, satisfied the space requirement better, improved the integration, the cost is reduced.

It should be understood that the second dotted line 42 shown in fig. 1 may also have a relatively large distance from the end surface of the second end 15, that is, in the case that the space between the inner wall of the housing 40 and the end surface of the second end 15 is abundant, the solution that the second bearing 80 and the rotating shaft 10 are integrated may still be adopted.

Referring to fig. 1, an outer peripheral surface of the second outer ring 82 and an end surface facing away from the first end 11 are respectively connected to the housing 40.

Alternatively, the second outer ring 82 may be integrally formed with the housing 40, or may be detachably connected (e.g., the second outer ring 82 is connected to the housing 40 by an interference fit), without limitation.

Optionally, the second outer ring 82 and the spoke 14 have a clearance in the axial direction, and friction between the second outer ring 82 and the spoke 14 and abnormal sound are not generated during transmission.

By providing the second outer ring 82 to be connected with the housing 40, the second outer ring 82 is fixed to the housing 40 in the circumferential direction, and at the same time, the second bearing 80 is fixed to the rotary shaft 10 in the axial direction and the radial direction of the housing 40.

Referring to fig. 1, the end surface of the first stopper 30 facing away from the second bearing 80 is flush with the first end surface 211, and/or the end surface of the second inner ring 81 facing away from the first bearing 20 is flush with the end surface of the second end 15.

Optionally, an end surface of the second limiting member 50 facing away from the third end surface 231 is flush with the fourth end surface 232.

Alternatively, the first limiting member 30 may partially protrude from the first end surface 211. Alternatively, the second limiting member 50 may partially protrude from the fourth end surface 232.

Through setting up first locating part 30 and second locating part 50 and first terminal surface 211 and fourth terminal surface 232 flush, perhaps, set up first locating part 30 and second locating part 50 part protrusion in first terminal surface 211 and fourth terminal surface 232, compare in first locating part 30 and second locating part 50 direct butt first terminal surface 211 and fourth terminal surface 232, reduced the axial length of vehicle drive mechanism 100, be favorable to arranging vehicle drive mechanism 100 in limited space, satisfied the space requirement better.

In the description of the embodiments of the present utility model, it should be noted that, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like refer to the orientation or positional relationship described based on the drawings, which are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The above disclosure is only a preferred embodiment of the present utility model, and it should be understood that the scope of the utility model is not limited thereto, but all or part of the procedures for implementing the above embodiments can be modified by one skilled in the art according to the scope of the appended claims.

Claims (10)

1. A vehicle transmission mechanism, characterized by comprising:

a rotating shaft including a first end;

the first bearing comprises a first inner ring, and the first inner ring part is sleeved at the first end; a first groove is formed in the first end face of the first inner ring protruding out of the first end, and the inner wall face of the first groove is connected with the first end face and the inner peripheral wall face of the first inner ring;

the first limiting piece is fixedly connected with the first end, protrudes out of the outer peripheral surface of the first end and stretches into the first groove, and the first limiting piece is in butt joint with the inner wall surface of the first groove in the axial direction of the rotating shaft.

2. The vehicle transmission mechanism according to claim 1, wherein the first groove extends in a circumferential direction of the first inner race and communicates end to end; the first limiting piece comprises a connecting part and a protruding part, the protruding part is connected to the circumferential direction of the connecting part, the connecting part is connected with the rotating shaft, and the protruding part stretches into the first groove and is abutted to the inner wall surface of the first groove in the axial direction of the rotating shaft;

the convex part is annular;

or,

the plurality of protruding portions are distributed at intervals in the circumferential direction of the connecting portion.

3. The vehicle transmission mechanism according to claim 1, further comprising a housing, wherein the first bearing further comprises a first outer race, the first outer race being sleeved on the first inner race; the first outer ring comprises a third end face, the third end face corresponds to the first end face, and the third end face and the outer peripheral surface of the first outer ring are in abutting connection with the shell.

4. The vehicle transmission mechanism according to claim 3, wherein the first outer ring further includes a fourth end surface opposite to the third end surface, the fourth end surface being provided with a second groove, an inner wall surface of the second groove being connected to the fourth end surface and an outer peripheral surface of the first outer ring; the vehicle transmission mechanism further comprises a second limiting piece, wherein the second limiting piece is connected with the shell and stretches into the second groove; the second limiting piece is abutted with the inner wall surface of the second groove in the axial direction of the rotating shaft.

5. The vehicle transmission mechanism according to claim 4, wherein the second groove extends along the circumferential direction of the first outer ring and is communicated end to end, and the second limiting member is annular, or the second limiting members are a plurality of and are arranged at intervals along the circumferential direction of the first outer ring;

or,

the second grooves are formed in a plurality of positions at intervals along the circumferential direction of the first outer ring, and the second limiting parts extend into the second grooves in a plurality of positions in a one-to-one correspondence mode.

6. The vehicle transmission mechanism according to claim 1, further comprising a third limiting member, wherein the third limiting member is sleeved on the rotating shaft and is fixed relative to the rotating shaft in a circumferential direction and an axial direction, the first inner ring has a second end surface facing away from the first end surface, and the second end surface abuts against the third limiting member.

7. The vehicle transmission mechanism of claim 1, further comprising a second bearing comprising a second inner race; the rotating shaft also comprises a second end opposite to the first end; the second inner ring is located at the second end and arranged on the outer peripheral surface of the rotating shaft, and the second inner ring and the rotating shaft are of an integrated structure.

8. The vehicle transmission mechanism of claim 7, wherein the second bearing further comprises a second outer race that is sleeved on the second inner race and that is connected to the housing.

9. The vehicle transmission mechanism according to claim 7, wherein an end surface of the first stopper facing away from the second bearing is flush with the first end surface, and/or an end surface of the second inner race facing away from the first bearing is flush with an end surface of the second end.

10. A vehicle comprising a vehicle transmission according to any one of claims 1-9.