CN117231697A

CN117231697A - Rotating shaft device and traveling equipment

Info

Publication number: CN117231697A
Application number: CN202311177605.3A
Authority: CN
Inventors: 李曼丽; 薛龙; 金翔; 唐琛; 曹大顾
Original assignee: Dongfeng Motor Corp
Current assignee: Dongfeng Motor Corp
Priority date: 2023-09-11
Filing date: 2023-09-11
Publication date: 2023-12-15

Abstract

The embodiment of the application discloses a rotating shaft device and running equipment, wherein the rotating shaft device comprises: a shaft body having an external spline portion; the synchronizer is sleeved outside the shaft body; the synchronizer is provided with an inner spline part matched with the outer spline part; the two first bearings are sleeved outside the shaft body at intervals; one of the two first bearings is arranged adjacent to the synchronizer; the first cylindrical part is sleeved outside the shaft body; the first cylindrical part is positioned between the two first bearings and is respectively abutted with the inner rings of the two first bearings; the first gear is sleeved outside the two first bearings; the rotating shaft device is provided with a first state and a second state; in the first state, the synchronizer is connected with the first gear in a matching way; in the second state, the synchronizer is spaced from the first gear.

Description

Rotating shaft device and traveling equipment

Technical Field

The application relates to the technical field of rotating shafts, in particular to a rotating shaft device and running equipment.

Background

The rotating shaft device is a structure which is frequently used in mechanical equipment; in the related art, the rotating shaft device includes a shaft structure, a synchronizing structure, and two bearing structures. The synchronous structure and the two bearing structures are sleeved on the shaft structure. The synchronous structure is arranged at the set position of the shaft structure through the spline housing, a spline boss is arranged between the two bearing structures and used for limiting the positions of the two bearing structures, but the two bearing structures are easy to scatter and damage.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a rotating shaft device and a driving apparatus.

The technical scheme of the application is realized as follows:

the embodiment of the application provides a rotating shaft device, which comprises:

a shaft body having an external spline portion;

the synchronizer is sleeved outside the shaft body; the synchronizer has an internal spline portion mated with the external spline portion;

the two first bearings are sleeved outside the shaft body at intervals; one of the two first bearings is arranged adjacent to the synchronizer;

the first cylindrical part is sleeved outside the shaft body; the first cylindrical part is positioned between the two first bearings and is respectively abutted with the inner rings of the two first bearings;

the first gear is sleeved outside the two first bearings;

the rotating shaft device is provided with a first state and a second state; in the first state, the synchronizer is in matched connection with the first gear; in the second state, the synchronizer is spaced from the first gear.

In some alternative implementations, the method further includes:

the second bearing is sleeved outside the shaft body; the second bearing and the first bearing are positioned on opposite sides of the synchronizer;

the third bearing is sleeved outside the shaft body; the third bearing is arranged at one side of the second bearing away from the synchronizer at intervals;

the second gear is sleeved outside the second bearing and the third bearing;

in the second state, the synchronizer is in fit connection with the second gear.

In some alternative implementations, the method further includes:

the second cylindrical part is sleeved outside the shaft body; the second cylindrical part is positioned between the second bearing and the third bearing, and is respectively abutted with the inner ring of the second bearing and the inner ring of the third bearing;

the second bearing is a closed-type bearing, and the third bearing is a closed-type bearing.

In some alternative implementations, the shaft body has a first boss, the second bearing and the third bearing are located on opposite sides of the first boss, and the inner ring of the second bearing and the inner ring of the third bearing respectively abut against the first boss;

the second bearing is an open type bearing, and the third bearing is a closed type bearing.

In some alternative implementations, the shaft body has a second boss, the synchronizer and the second bearing are located on opposite sides of the second boss, and the gear hub of the synchronizer and the inner ring of the second bearing respectively abut against the second boss.

In some alternative implementations, the shaft includes:

a first shaft section disposed adjacent to the second boss; the first shaft section has the externally splined portion,

the second shaft section is positioned at one side of the first shaft section away from the second boss; the diameter of the second shaft section is smaller than that of the first shaft section;

the two first bearings and the first cylindrical part are sleeved on the second shaft section, and the inner ring of one of the two first bearings is in butt joint with the step protruding out of the second shaft section in the circumferential direction.

In some alternative implementations, the shaft further includes:

a third shaft section disposed adjacent to the second boss; the third shaft section and the first shaft section are positioned on two opposite sides of the second boss;

the second bearing and the third bearing are sleeved on the third shaft section.

In some alternative implementations, the diameter of the third shaft section is greater than the diameter of the second shaft section.

In some alternative implementations, the method further includes:

the third cylindrical part is sleeved outside the shaft body; the third cylindrical part is abutted with the inner ring of the first bearing far away from the synchronizer in the two first bearings;

the fourth cylindrical part is sleeved outside the shaft body; the fourth cylindrical part is positioned on one side of the third bearing away from the second bearing and is abutted with the inner ring of the third bearing.

In some alternative implementations, the first bearing, the second bearing, and the third bearing are each needle bearings; and/or the number of the groups of groups,

the two first bearings are closed type bearings.

The embodiment of the application provides a running device, which comprises a shell and the rotating shaft device of the embodiment of the application,

the synchronizer, the two first bearings, the first cylindrical member and the first gear are located in the housing.

According to the rotating shaft device, a spline boss is not required to be arranged between the two first bearings, the first cylindrical part is positioned between the two first bearings and used for limiting the positions of the two first bearings, and the two first bearings are not easy to break up.

Drawings

FIG. 1 is a cross-sectional view of an alternative construction of a swivel arrangement in accordance with an embodiment of the application;

FIG. 2 is a schematic view of a shaft body in the spindle device of FIG. 1;

FIG. 3 is a cross-sectional view of an alternative construction of a swivel arrangement in accordance with an embodiment of the application;

fig. 4 is a schematic structural view of a shaft body in the rotating shaft device of fig. 3.

Reference numerals: 110. a shaft body; 111. an external spline portion; 112. a first boss; 113. a second boss; 114. a first shaft section; 115. a second shaft section; 116. a third shaft section; 120. a synchronizer; 121. a gear hub; 130. a first bearing; 140. a first gear; 150. a second gear; 160. a second bearing; 170. a third bearing; 210. a first tubular member; 220. a second tubular member; 230. a third tubular member; 240. and a fourth tubular member.

Detailed Description

The technical scheme of the application is further elaborated below by referring to the drawings in the specification and the specific embodiments.

In describing embodiments of the present application, unless otherwise indicated and limited thereto, the term "connected" should be construed broadly, for example, it may be an electrical connection, or may be a communication between two elements, or may be a direct connection, or may be an indirect connection via an intermediate medium, and it will be understood by those skilled in the art that the specific meaning of the term may be interpreted according to circumstances.

It should be noted that, the term "first\second\third" related to the embodiment of the present application is merely to distinguish similar objects, and does not represent a specific order for the objects, it is to be understood that "first\second\third" may interchange a specific order or sequence where allowed. It is to be understood that the "first\second\third" distinguishing objects may be interchanged where appropriate such that embodiments of the application described herein may be practiced in sequences other than those illustrated or described herein.

The following describes a rotating shaft device according to an embodiment of the present application in detail with reference to fig. 1 to 4.

As shown in fig. 1, the rotation shaft device includes a shaft body 110, a synchronizer 120, two first bearings 130, a first cylinder 210, and a first gear 140. The shaft body 110 has an external spline portion 111; the synchronizer 120 is sleeved outside the shaft body 110, and the synchronizer 120 is provided with an inner spline part matched with the outer spline part 111; the two first bearings 130 are sleeved outside the shaft body 110 at intervals; one first bearing 130 of the two first bearings 130 is disposed adjacent to the synchronizer 120; the first tubular member 210 is sleeved outside the shaft body 110; the first cylindrical member 210 is located between the two first bearings 130, and the first cylindrical member 210 is respectively abutted against inner rings of the two first bearings 130; the first gear 140 is sleeved outside the two first bearings 130; the rotating shaft device is provided with a first state and a second state; in the first state, the synchronizer 120 is cooperatively connected with the first gear 140; in the second state, the synchronizer 120 is disposed spaced apart from the first gear 140.

In the related art, the rotating shaft device includes a shaft structure, a synchronizing structure, and two bearing structures. The synchronous structure and the two bearing structures are sleeved on the shaft structure. The synchronous structure is sleeved at the set position of the shaft structure through a spline, a spline boss is arranged between the two bearing structures, and when the synchronous structure is installed on the rotating shaft structure, the synchronous structure is sleeved at the set position of the shaft structure after passing through the spline boss; the spline boss is used for limiting the position of two bearing structures, but because the terminal surface of spline boss is incomplete, there is the recess region in the terminal surface of spline boss for two bearing structures are easy to break up and damage. Meanwhile, in order to facilitate sleeving the synchronous structure at the set position of the shaft structure, the boss arranged between the two bearing structures is required to be provided with a spline, so that the shaft structure is complex, and the processing difficulty is high. In the rotating shaft device of the present application, there is no need to provide a spline boss between the two first bearings 130, the first cylindrical member 210 is located between the two first bearings 130, and the first cylindrical member 210 is used to define the positions of the two first bearings 130, where the two first bearings 130 are not easy to break up. Meanwhile, as the spline boss does not need to be machined, the shaft structure is simpler, and the machining difficulty is greatly reduced. In addition, since the first cylindrical member 210 is sleeved outside the shaft body 110, the synchronizer 120 can be mounted on the shaft body 110 first, and then the first cylindrical member 210 is mounted on the shaft body 110, so that the mounting of the synchronizer 120 does not need to consider spline bosses, and the mounting difficulty of the rotating shaft device is greatly reduced.

In the embodiment of the present application, the shaft body 110 has the external spline portion 111, and the synchronizer 120 has the internal spline portion, and the synchronizer 120 can be fixed in the rotation direction with respect to the shaft body 110 by the external spline portion 111 and the internal spline portion being engaged, that is, the synchronizer 120 and the shaft body 110 can be rotated together.

The synchronizer 120 may include a gear hub 121 and a connection portion, where the gear hub 121 may have an internal spline portion, and the connection portion may be movable relative to the gear hub 121 to be cooperatively connected with or spaced from the first gear 140.

The specific structure of the synchronizer 120 is not limited, as long as the synchronizer 120 can be fixed to the shaft body 110 and can be cooperatively connected or spaced from the first gear 140. When the synchronizer 120 is in fit connection with the first gear 140, the first gear 140 can rotate together with the synchronizer 120 and the shaft 110; when the synchronizer 120 is spaced apart from the first gear 140, the first gear 140 does not rotate with the synchronizer 120 and the shaft 110, i.e., the first gear 140 is not sleeved on the shaft 110.

As an example, the synchronizer 120 may be a normal pressure type synchronizer 120, an inertia type synchronizer 120, or a self-boosting type synchronizer 120.

The hub 121 of the synchronizer 120 is fixed in position in the axial direction with respect to the shaft body 110. The manner in which the hub 121 of the synchronizer 120 is fixed in axial position relative to the shaft 110 is not limited. For example, the hub 121 of the synchronizer 120 may be defined by a step on the shaft 110 or a structural member that is sleeved on the shaft 110.

As an example, as shown in fig. 1 and 2, the shaft body 110 has a second boss 113, one end of the gear hub 121 of the synchronizer 120 abuts against the second boss 113, and the other end of the gear hub 121 of the synchronizer 120 abuts against a structural member on the shaft body 110, and the structural member on the shaft body 110 may be a collar or a collar.

In the embodiment of the present application, the type of the first bearing 130 is not limited. For example, the first bearing 130 may be a needle bearing. Of course, in other examples, the first bearing 130 may be other types of bearings.

The two first bearings 130 may be either open type bearings or closed type bearings. When the two first bearings 130 are closed-type bearings, the probability of failure of the first bearings 130 can be reduced.

The two first bearings 130 are sleeved on the shaft body 110, and one ends of inner rings of the two first bearings 130 are limited by the first cylindrical member 210. The other end of the inner rings of the two first bearings 130 is not limited in the manner of being limited. For example, the other ends of the inner rings of the two first bearings 130 may be defined by steps on the shaft body 110, or may be defined by structural members fitted over the shaft body 110.

As an example, the other end of the inner ring of the first bearing 130, which is close to the synchronizer 120, of the two first bearings 130 is abutted against the step on the shaft body 110, so that the limit is performed by the step on the shaft body 110; the other end of the inner ring of the first bearing 130 far away from the synchronizer 120 in the two first bearings 130 is abutted with a structural member sleeved on the shaft body 110, so that the bearing is limited by the structural member sleeved on the shaft body 110; the structural member sleeved on the shaft body 110 can be a collar or a collar.

In an application, as shown in fig. 1 and 3, the rotating shaft device may further include a third cylindrical member 230, where the third cylindrical member 230 is sleeved outside the shaft body 110; the third cylindrical member 230 abuts against the inner ring of the first bearing 130 apart from the synchronizer 120 out of the two first bearings 130; so that the inner ring of the first bearing 130 far from the synchronizer 120 among the two first bearings 130 is restrained by the third cylinder 230.

The structure of the third cylinder 230 is not limited. For example, the third tubular member 230 may be a tubular spacer, a collar, or a snap ring.

Note that in fig. 1 and 3, there is a gap between the third cylindrical member 230 and the first gear 140, and the third cylindrical member 230 is not abutted against the first gear 140.

In the embodiment of the present application, the structure of the first cylinder 210 is not limited. For example, the first tubular member 210 may be a tubular spacer or a collar.

In the embodiment of the application, the first gear 140 is sleeved outside the two first bearings 130, so that the first gear 140 is supported by the two first bearings 130, and the first gear 140 is sleeved on the shaft body 110 through the two first bearings 130.

The rotating shaft device is provided with a first state and a second state; in the first state, the synchronizer 120 is cooperatively connected with the first gear 140, and at this time, the synchronizer 120 can drive the first gear 140 to rotate together; in the second state, the synchronizer 120 is spaced apart from the first gear 140, and at this time, the first gear 140 does not rotate with the synchronizer 120.

In some optional implementations of the embodiments of the present application, the rotation shaft device may further include: a second bearing 160, a third bearing 170 and a second gear 150. The second bearing 160 is sleeved outside the shaft body 110; the second bearing 160 and the first bearing 130 are located on opposite sides of the synchronizer 120; the third bearing 170 is sleeved outside the shaft body 110; the third bearing 170 is disposed at a side of the second bearing 160 away from the synchronizer 120; the second gear 150 is sleeved outside the second bearing 160 and the third bearing 170; in the second state, the synchronizer 120 is cooperatively connected with the second gear 150; so that the second gear 150 rotates with the synchronizer 120.

Of course, the spindle device may also have a third state in which the synchronizer 120 is spaced apart from the first gear 140 and the second gear 150, respectively, such that neither the first gear 140 nor the second gear 150 rotates with the synchronizer 120.

In this embodiment, the basic parameters of the first gear 140 and the basic parameters of the second gear 150 may be the same or different. When the basic parameters of the first gear 140 and the basic parameters of the second gear 150 are different, the rotation shaft device may output different transmission ratios through the first gear 140 and the second gear 150.

In the present implementation, the type of the second bearing 160 is not limited. For example, the second bearing 160 may be a needle bearing. Of course, in other examples, the second bearing 160 may be other types of bearings.

The second bearing 160 is sleeved on the shaft body 110, and the limiting manner of the two ends of the inner ring of the second bearing 160 is not limited. For example, both ends of the inner ring of the second bearing 160 may be defined by steps on the shaft body 110, or may be defined by structural members fitted over the shaft body 110.

In the present embodiment, the type of the third bearing 170 is not limited. For example, the third bearing 170 may be a needle bearing. Of course, in other examples, the third bearing 170 may be other types of bearings.

The third bearing 170 is sleeved on the shaft body 110, and the limiting manner of the two ends of the inner ring of the third bearing 170 is not limited. For example, both ends of the inner ring of the third bearing 170 may be defined by steps on the shaft body 110, or may be defined by structural members fitted over the shaft body 110.

In this implementation, the shaft body 110 may have a second boss 113, and the synchronizer 120 and the second bearing 160 may be located at opposite sides of the second boss 113, and the gear hub 121 of the synchronizer 120 and the inner ring of the second bearing 160 respectively abut against the second boss 113 so as to limit the gear hub 121 of the synchronizer 120 and the inner ring of the second bearing 160, respectively, through the second boss 113.

In this implementation, as shown in fig. 2 and 4, the shaft body 110 may include: a first shaft section 114 and a second shaft section 115. The first shaft section 114 is disposed adjacent to the second boss 113; the first shaft section 114 has an external spline portion 111, and the second shaft section 115 is located on a side of the first shaft section 114 remote from the second boss 113; the diameter of the second shaft section 115 is smaller than the diameter of the first shaft section 114; the two first bearings 130 and the first barrel 210 are sleeved on the second shaft section 115,

the inner ring of one first bearing 130 of the two first bearings 130 is abutted with the step of the first shaft section 114 protruding from the second shaft section 115 in the circumferential direction, so that the inner ring of one first bearing 130 of the two first bearings 130 is limited by the step formed by the first shaft section 114 and the second shaft section 115, and the structure of the rotating shaft device is simplified.

Of course, in other implementations, the inner ring of one of the two first bearings 130 may be defined by a structural member sleeved on the shaft body 110.

The shaft body 110 may further include: a third shaft section 116, the third shaft section 116 being disposed adjacent to the second boss 113; the third shaft section 116 and the first shaft section 114 are located on opposite sides of the second boss 113; the second bearing 160 and the third bearing 170 are sleeved on the third shaft section 116.

Here, as shown in fig. 2 and 4, the diameter of the third shaft section 116 may be larger than the diameter of the second shaft section 115. Of course, the diameter of the third shaft section 116 may also be less than or equal to the diameter of the second shaft section 115.

As shown in fig. 1 and 2, the shaft body 110 has a first boss 112, the second bearing 160 and the third bearing 170 are located at opposite sides of the first boss 112, and an inner ring of the second bearing 160 and an inner ring of the third bearing 170 respectively abut against the first boss 112; so that the first boss 112 is respectively the inner ring of the second bearing 160 and the inner ring of the third bearing 170.

In the first example, the other end of the inner ring of the second bearing 160 may be defined by a step on the shaft body 110, or may be defined by a structural member sleeved on the shaft body 110.

As an example, as shown in fig. 1, the hub 121 of the synchronizer 120 and the inner race of the second bearing 160 may be defined by the second boss 113, respectively.

Here, the second bearing 160 is an open type bearing so that the second bearing 160 can be installed between the second boss 113 and the first boss 112.

In the first example, the other end of the inner ring of the third bearing 170 may be defined by a step on the shaft body 110, or may be defined by a structural member sleeved on the shaft body 110.

As an example, as shown in fig. 1, the rotation shaft device may further include: the fourth cylinder 240, the fourth cylinder 240 is sleeved outside the shaft body 110; the fourth cylinder 240 is located on a side of the third bearing 170 remote from the second bearing 160 and abuts against an inner ring of the third bearing 170 so that the inner ring of the third bearing 170 is defined by the fourth cylinder 240.

Here, the structure of the fourth cylindrical member 240 is not limited. For example, the fourth tubular member 240 may be a tubular spacer, a collar, or a snap ring.

It should be noted that, as shown in fig. 1 and 3, there is a gap between the fourth cylinder 240 and the second gear 150, and the fourth cylinder 240 is not abutted against the second gear 150.

Here, the third bearing 170 may be an open type bearing or a closed type bearing. When the third bearing 170 is a closed-type bearing, the probability of failure of the third bearing 170 can be reduced.

When the rotating shaft device includes the second cylindrical member 220, the second cylindrical member 220 is sleeved on the third shaft section 116.

As shown in fig. 3 and 4, the rotation shaft device may further include: the second cylinder 220, the second cylinder 220 is sleeved outside the shaft body 110; the second cylindrical member 220 is located between the second bearing 160 and the third bearing 170, and the second cylindrical member 220 abuts against the inner ring of the second bearing 160 and the inner ring of the third bearing 170, respectively; so that the second cylindrical member 220 is restrained by the inner ring of the second bearing 160 and the inner ring of the third bearing 170, respectively.

In the second example, the other end of the inner ring of the second bearing 160 may be defined by a step on the shaft body 110, or may be defined by a structural member fitted over the shaft body 110.

As an example, as shown in fig. 3, the hub 121 of the synchronizer 120 and the inner race of the second bearing 160 are defined by the second boss 113, respectively.

Here, the second bearing 160 may be an open type bearing or a closed type bearing. When the second bearing 160 is a closed-type bearing, the probability of failure of the second bearing 160 can be reduced.

In the second example, the other end of the inner ring of the third bearing 170 may be defined by a step on the shaft body 110, or may be defined by a structural member sleeved on the shaft body 110.

As an example, as shown in fig. 3, the inner race of the third bearing 170 is defined by a fourth cylindrical member 240.

When the spindle assembly includes the first boss 112, the first boss 112 is located in the third shaft section 116.

The embodiment of the application also discloses a running device, which comprises a shell and the rotating shaft device of the embodiment of the application, wherein the synchronizer 120, the two first bearings 130, the first cylindrical part 210 and the first gear 140 are positioned in the shell.

Here, the housing may be a housing of a driving system of the traveling apparatus so as to realize multi-stage driving through the first gear 140 and the second gear 150.

The shaft 110 may be entirely within the housing or may be partially within the housing.

The shaft body 110 may be rotatably provided by a bearing.

The structure of the running apparatus is not limited. For example, the traveling apparatus may be an automobile or a truck.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A spindle assembly, comprising:

a shaft body having an external spline portion;

the first gear is sleeved outside the two first bearings;

2. The spindle assembly of claim 1, further comprising:

the second gear is sleeved outside the second bearing and the third bearing;

3. The spindle assembly of claim 2, further comprising:

4. The rotary shaft device according to claim 2, wherein the shaft body has a first boss, the second bearing and the third bearing are located on opposite sides of the first boss, and an inner ring of the second bearing and an inner ring of the third bearing are respectively abutted with the first boss;

5. The rotary shaft device according to claim 2, wherein the shaft body has a second boss, the synchronizer and the second bearing are located on opposite sides of the second boss, and a gear hub of the synchronizer and an inner ring of the second bearing are respectively abutted with the second boss.

6. The spindle apparatus of claim 5, wherein the spindle body comprises:

7. The spindle assembly of claim 6 wherein said shaft further comprises:

8. The spindle assembly of claim 7 wherein the diameter of the third shaft section is greater than the diameter of the second shaft section.

9. A spindle assembly according to any one of claims 2 to 8, further comprising:

10. A spindle assembly according to any one of claims 2 to 8, wherein the first bearing, the second bearing and the third bearing are needle bearings; and/or the number of the groups of groups,

the two first bearings are closed type bearings.

11. A traveling apparatus comprising a housing and the rotating shaft device according to any one of claims 1 to 10,