WO2023092589A1

WO2023092589A1 - Transmission mechanism

Info

Publication number: WO2023092589A1
Application number: PCT/CN2021/134108
Authority: WO
Inventors: 陈春晖
Original assignee: 舍弗勒技术股份两合公司
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2023-06-01
Also published as: CN117897567A

Abstract

A transmission mechanism, comprising: a power input shaft; a first transmission member and a second transmission member which are fixedly arranged on the power input shaft; a power output shaft; a third transmission member and a fourth transmission member which are rotatably arranged on the power output shaft, wherein the first transmission member transmits a first torque to the third transmission member, and the second transmission member transmits a second torque to the fourth transmission member; and a hydraulic clutch mechanism, wherein the hydraulic clutch mechanism is fixed to the power output shaft and located between the third transmission member and the fourth transmission member, and the hydraulic clutch mechanism can be operated to be disengaged from or engaged with the third transmission member or disengaged from or engaged with the fourth transmission member.

Description

a transmission mechanism

technical field

The invention relates to a transmission mechanism, in particular to a transmission mechanism with a hydraulic control reversing function.

Background technique

The transmission system may include various forms of transmission mechanisms, such as gear transmission mechanisms, link transmission mechanisms, belt transmission mechanisms, worm gear transmission mechanisms, etc., to achieve different purposes or functions. The transmission mechanism can also realize co-direction transmission or reverse transmission through different specific structures, such as using belts, gears, friction wheels, ratchets, clutches and other structural reversing. However, the traditional transmission mechanism has a single function, and usually can only realize a specific transmission form. In addition, for the transmission mechanism capable of performing the reversing function, the traditional reversing operation is usually a mechanical operation, for example, switching the positions of components therein through a mechanical lever. This mechanical operation is often cumbersome and difficult to intelligently control.

Therefore, there is a need for a transmission mechanism that can provide multiple transmission forms or functions, is flexible in operation, and is easy to realize intelligent control.

Contents of the invention

The object of the present invention is achieved by providing a transmission mechanism.

According to an exemplary embodiment, the transmission mechanism includes: a power input shaft; a first transmission member and a second transmission member fixedly arranged on the power input shaft; a power output shaft; The third transmission member and the fourth transmission member on the top, wherein the first transmission member transmits the first torque to the third transmission member, and the second transmission member transmits the second torque to the fourth transmission member; and a clutch mechanism, the clutch mechanism It is fixed on the power output shaft and located between the third transmission member and the fourth transmission member. The clutch mechanism is a hydraulic clutch mechanism, and the hydraulic clutch mechanism includes a hydraulic cylinder body fixed to the power output shaft, and a first chamber for accommodating the first piston member and a second piston member are formed in the hydraulic cylinder body. The second chamber of the member, the first piston member is configured to be hydraulically driven to disengage or engage the third transmission member, and the second piston member is configured to be hydraulically driven to disengage or engage the fourth transmission member .

According to another exemplary embodiment, the direction of the first torque is opposite to that of the second torque.

According to another exemplary embodiment, the first transmission member and the third transmission member are pulleys, the second transmission member and the fourth transmission member are gears, and the transmission mechanism further includes and the drive belt of the third transmission member.

According to another exemplary embodiment, the side of the first piston member facing away from the third transmission member forms a first hydraulic chamber, the side of the second piston member facing away from the fourth transmission member forms a second hydraulic chamber, and the first hydraulic chamber The chamber and the second hydraulic chamber are in fluid communication with the hydraulic control mechanism through a first fluid passage and a second fluid passage formed inside the power take-off shaft, respectively.

According to another exemplary embodiment, the hydraulic cylinder block is integrally formed with the power output shaft.

According to another exemplary embodiment, the clutch mechanism further includes a first clutch plate arranged between the first piston member and the third transmission member, and a first clutch plate arranged between the second piston member and the fourth transmission member. Two clutch plates.

According to another exemplary embodiment, the transmission mechanism further includes a rotation output part integrally formed on the radially outer side of the clutch mechanism.

According to another exemplary embodiment, both the first chamber and the second chamber are formed as annular grooves centered on the axis of the power output shaft, and the first piston member and the second piston member are both It is an annular piston member.

According to another exemplary embodiment, each of the first piston member and the second piston member has a plunger section and a fixed rotation section along the axial direction of the power output shaft, and the fixed rotation section It is fixed in the rotational direction with respect to the hydraulic cylinder block by the fixing member.

According to another exemplary embodiment, an annular first sealing groove is formed on the inner peripheral surface of the first piston member or the second piston member or the outer peripheral surface of the plunger section, and the first chamber or the second An annular second sealing groove corresponding to the first sealing groove is formed on the inner or outer peripheral surface of the chamber, the first part of an elastic sealing ring is arranged in the first sealing groove and the elastic sealing ring The second part is set in the second sealing groove.

The transmission mechanism of the present invention has the following advantages:

1. The switching of the rotation direction of the power output shaft is realized through hydraulic control, the switching execution speed is fast, the wear of mechanical parts is small, and the service life of the transmission mechanism can be significantly extended;

2. The ring-shaped piston component is used to realize the rotational symmetry of the structure in a simple way, which is conducive to the smooth output of the rotational force of the power output shaft;

3. The elastic sealing rings used to seal the hydraulic chamber are arranged in two opposite sealing grooves, which can help the piston member reset through its elastic restoring force.

Description of drawings

Embodiments of the transmission mechanism of the present invention will be described below in conjunction with the following drawings, wherein:

1 is a perspective view of a transmission mechanism according to an embodiment of the present invention;

Fig. 2 is an axial sectional view of the transmission mechanism shown in Fig. 1;

Fig. 3 is the perspective view of the power output part of the transmission mechanism shown in Fig. 1;

Fig. 4 is an exploded view of the power output part shown in Fig. 3;

Fig. 5 is an axial sectional view of the power output portion shown in Fig. 3 .

Detailed ways

A number of exemplary embodiments of the transmission mechanism of the present invention will be described in detail below with reference to FIGS. 1 to 5 .

According to one embodiment of the present invention, a transmission mechanism is provided.

As shown in Figures 1 and 2, the transmission mechanism 100 includes: a power input shaft 11; a first transmission member 12 and a second transmission member 13 fixedly arranged on the power input shaft 11; a power output shaft 21; rotatably The third transmission member 22 and the fourth transmission member 23 arranged on the power output shaft 21, wherein the first transmission member 12 transmits the first torque to the third transmission member 22, and the second transmission member 13 transmits the first torque to the fourth transmission member 23 transmits the second torque; and a clutch mechanism 24 fixed on the power output shaft 21 and located between the third transmission member 22 and the fourth transmission member 23 .

According to the present invention, the directions of the first torque and the second torque may be the same or opposite, which may be realized by providing different combinations of the first, second, third and fourth transmission members.

For example, in the embodiment shown in FIGS. 1 and 2 , the first transmission member 12 and the third transmission member 22 are pulleys, and the first transmission member 12 transmits the first transmission to the third transmission member 22 through the transmission belt 14 . The torque causes the third transmission member 22 to rotate in the same direction as the first transmission member 12; the second transmission member 13 and the fourth transmission member 23 are gears that mesh with each other, so that the second transmission member 13 transmits to the fourth transmission member 23 The second torque can drive the fourth transmission member 23 to reversely rotate relative to the first transmission member 12 . In this embodiment, the direction of the first torque transmitted from the first transmission member 12 to the third transmission member 22 is opposite to the direction of the second torque transmitted from the second transmission member 13 to the fourth transmission member 23 . Those skilled in the art can appreciate that, for example, if the first transmission member 12 and the third transmission member 22 also adopt gears meshing with each other, the directions of the first torque and the second torque may also be the same.

According to the present invention, the first transmission ratio between the first transmission member 12 and the third transmission member 22 and the second transmission ratio between the second transmission member 13 and the fourth transmission member 23 may be the same or different. For example, in the embodiment shown in FIGS. 1 and 2, the diameter of the first transmission member 12 and the third transmission member 22 can be changed by changing the diameter of the transmission pulley (ie, the first transmission member 12 and the third transmission member 22). transmission ratio between. Similarly, the transmission ratio between the second transmission member 13 and the fourth transmission member 23 can also be changed by using gears with different numbers of teeth.

In the embodiment shown in Figures 1 and 2, the second transmission member 13 and the fourth transmission member 23 are directly engaged, but those skilled in the art can expect that the second transmission member 13 and the fourth transmission member 23 can also be connected through a Or multiple intermediate gears mesh indirectly. By adjusting the number of teeth of each gear and the number of intermediate gears, the torque transmission direction and/or transmission ratio between the second transmission member 13 and the fourth transmission member 23 can be adjusted.

In other embodiments not shown, the first transmission member 12 and the third transmission member 22 may also be set to rotate in opposite directions, while the second transmission member 13 and the fourth transmission member 23 may be set to rotate in the same direction. In addition, although the second transmission member 13 and the fourth transmission member 23 in FIGS. 1 to 5 are both bevel gears, in other embodiments, they may also be other forms of gears such as cylindrical gears.

In an exemplary embodiment of the present invention, as shown in FIG. 4 , the third transmission member 22 is installed on the power output shaft 21 through the first bearing 221 , and the fourth transmission member 23 is installed on the power output shaft 21 through the second bearing 231 superior. In a further preferred embodiment, the transmission mechanism 100 may further include a first top ring 25 against the outer end of the third transmission member 22 and a second top ring 25 ′ against the outer end of the fourth transmission member 23, the first top ring 25 And the second top ring 25 ′ is used to fix the position of the third transmission member 22 and the fourth transmission member 23 in the axial direction of the power output shaft, so as to ensure the normal operation of the third transmission member 22 and the fourth transmission member 23 .

As shown in FIGS. 3 to 5 , according to an embodiment of the present invention, the clutch mechanism 24 is a hydraulic clutch mechanism, and the hydraulic clutch mechanism includes a hydraulic cylinder block 241 fixed to the power output shaft 21 , and the hydraulic clutch mechanism 24 A first chamber for accommodating a first piston member 242 and a second chamber for accommodating a second piston member 242 ′ are formed in the cylinder body 241 , the first piston member 242 is configured to be disengageable or engageable with the third transmission member 22 , The second piston member 242 ′ is configured to be disengageable or engageable with the fourth transmission member 23 .

Specifically, a first hydraulic chamber 244 is formed on a side of the first piston member 242 away from the third transmission member 22, and a second hydraulic chamber 244' is formed on a side of the second piston member 242' away from the fourth transmission member 23. The first hydraulic chamber 244 and the second hydraulic chamber 244' are in fluid communication with the hydraulic control mechanism (not shown) through the first fluid channel 246 and the second fluid channel 246' formed inside the power output shaft 21, respectively. Under the control of the hydraulic control mechanism, the hydraulic fluid medium is alternately pressed into the first hydraulic chamber 244 and the second hydraulic chamber 244', so that the internal pressure of the corresponding hydraulic chamber increases, pushing the corresponding piston member to engage with the corresponding transmission member or separation.

In a preferred embodiment, as shown in FIG. 5 , the hydraulic cylinder block 241 can be integrally formed with the power take-off shaft 21 , so that the gap between the inner peripheral surface of the hydraulic cylinder block 241 and the outer peripheral surface of the power take-off shaft 21 can be advantageously eliminated. sealing requirements.

According to one embodiment, as shown in FIGS. 4 and 5 , a first clutch plate 248 is provided between the first piston member 242 and the third transmission member 22 , and a first clutch plate 248 is provided between the second piston member 242 ′ and the fourth transmission member 23 . There is a second clutch plate 248' between them. The first clutch plate 248 can be fixedly arranged on the outer end surface of the first piston member 242 opposite to the third transmission member 22 , or fixedly arranged on the end surface of the third transmission member 22 opposite to the first piston member 242 . Similarly, the second clutch plate 248' can be fixedly arranged on the outer end surface of the second piston member 242' opposite to the fourth transmission member 23, or fixedly arranged on the fourth transmission member 23 opposite to the second piston member 242' on the end face. In an embodiment not shown, the first clutch plate may include a pair of clutch plates, respectively fixed on the surface of the first piston member 242 opposite to the third transmission member 22 . The second clutch plate may also include a pair of clutch plates, which are respectively fixed on the surface of the second piston member 242' opposite to the fourth transmission member 23.

According to one embodiment, as shown in FIG. 4 and FIG. 5 , the first chamber accommodating the first piston member 242 and the second chamber accommodating the second piston member 242 ′ are both formed so that the axis of the power take-off shaft 21 is The central annular groove, the first piston member 242 and the second piston member 242' are annular piston members. In this way, the structure on the power output shaft 21 can be advantageously configured to be rotationally symmetrical, thereby facilitating smooth output of rotational power.

According to one embodiment, as shown in FIG. 4 , each of the first piston member 242 and the second piston member 242 ′ may be formed to have a plunger section and a rotationally fixed section along the axial direction of the power output shaft 21 , the rotation fixed section is fixed in the rotation direction relative to the hydraulic cylinder block or the power output shaft 21 through a fixing structure. Specifically, the outer peripheral surface of the rotating fixed section may be formed to have a structure similar to a spline or a gear, which cooperates with a corresponding structure formed on the inner surface of a corresponding part in the chamber for accommodating the piston member, so that the first piston member 242 and the second piston member 242 ′ are fixed in the rotational direction relative to the PTO shaft 21 , so the rotational movement of the first piston member 242 and the second piston member 242 ′ can drive the PTO shaft 21 to rotate.

According to one embodiment, as shown in the right part of FIG. An annular second sealing groove is formed on the surface, the first sealing groove and the second sealing groove correspond to the axial direction of the power output shaft 21 , and an elastic sealing ring 247 is arranged in the first sealing groove and the second sealing groove. Specifically, the first part of the elastic sealing ring 247 is arranged in the first sealing groove, and the second part of the elastic sealing ring 247 is arranged in the second sealing groove. By arranging the sealing ring in this way, not only the fluid sealing of the hydraulic chamber can be realized, but also the elastic restoring force of the sealing ring itself can be used to help the piston member reset after the pressure of the hydraulic chamber is released.

As shown in FIG. 5 , an annular sealing groove may also be provided on the inner peripheral surface of the first piston member 242, and another seal groove may be provided at a corresponding position on the outer peripheral surface of the power output shaft (or the inner peripheral surface of the first chamber). An annular sealing groove, and another sealing ring 247 is arranged in these two sealing grooves in the same way.

According to a preferred embodiment, as shown in the left part of Fig. 5, the same sealing structure as the first piston member 242 and the first chamber is provided between the second piston member 242' and the wall of the second chamber.

In an exemplary embodiment, under the depressurized state of the first hydraulic chamber 244, the end face of the first piston member 242 (the end face of the clutch if a clutch plate is provided) and the end face of the third transmission member 23 The distance between the end surfaces (the end surfaces of the clutch in the case where the clutch plates are provided) was set to 0.2 mm. In the state of pressurizing the first hydraulic chamber 244, the first piston member 242 moves toward and engages with the third transmission member 23, and the two opposite sealing grooves where the sealing ring 247 is installed are axially misaligned, so that the sealing ring 247 undergoes elastic deformation. When the pressurized state is released, the elastic restoring force of the sealing ring 247 helps the first piston member 242 quickly return to the depressurized state.

According to an embodiment of the present invention, the transmission mechanism 100 further includes a rotation output portion 249 fixed to the power output shaft 21 . In a preferred embodiment, as shown in FIGS. 4 and 5 , the rotation output portion 249 is fixed to the radially outer side of the hydraulic cylinder block 241 . In a further preferred embodiment, the rotation output part 249 is integrally formed with the hydraulic cylinder block 241 . The rotary output part 249 can have many possible forms, and in an embodiment of the present invention, the rotary output part 249 is a gear part for meshing with internal teeth of an external driven part.

According to an exemplary embodiment, the transmission mechanism 100 of the present invention can realize the reversing of the rotational movement by operating the hydraulic clutch mechanism 24 . An exemplary working process is as follows.

As shown in Figure 1, the power input shaft 11 is driven by an external power source (not shown in the figure), such as through the spline portion at the right end of the power input shaft 11, to drive the power input shaft 11 to rotate clockwise, and the power input shaft 11 drives and is fixedly installed on it. The first transmission member 12 and the second transmission member 13 on the top rotate clockwise. The first transmission member 12 drives the third transmission part 22 to rotate clockwise, and the second transmission member 13 drives the fourth transmission part 23 to rotate counterclockwise. As shown in FIG. 5, when the hydraulic control mechanism (not shown in the figure) pressurizes the first hydraulic chamber 244 through the first fluid passage 246, and at the same time depressurizes the second hydraulic chamber 244' through the second fluid passage 246', The first piston member 242 moves to the right and engages with the third transmission member 22 through the clutch plate, while the second piston member 242 ′ remains separated from the fourth transmission member 23 . When the first piston member 242 is engaged with the third transmission member 22, the third transmission member 22 drives the first piston member 242 to rotate clockwise, and the first piston member 242 drives the hydraulic cylinder body 241 to rotate clockwise. At this time, the rotation output part 249 clockwise rotation. Conversely, when the hydraulic control mechanism pressurizes the second hydraulic chamber 244' through the second fluid passage 246' and at the same time depressurizes the first hydraulic chamber 244 through the first fluid passage 246, the second piston member 242' moves to the left , engages with the fourth transmission member 23 through the clutch plate, while the first piston member 242 remains separated from the third transmission member 22 . When the second piston member 242' is engaged with the fourth transmission member 23, the fourth transmission member 23 drives the second piston member 242' to rotate counterclockwise, and the second piston member 242' drives the hydraulic cylinder body 241 to rotate counterclockwise. The output part 249 rotates counterclockwise.

It should be understood that, in the case that no rotation output part is provided on the radially outer side of the clutch mechanism, the transmission mechanism 100 of the present invention can also output the rotation movement outward through the power output shaft 21 itself, and the rotation direction can be realized through the operations described above. switch. For example, the left end and/or right end of the power take-off shaft 21 can be connected to other shaft parts through a coupling, or the left end and/or right end of the power take-off shaft 21 can be engaged with the inner key grooves of other shaft parts through an external spline structure, thereby connecting The rotational torque is transmitted to other shaft-shaped members.

In addition, those skilled in the art should also understand that the transmission mechanism 100 of the present invention can also transmit torque when the clutch mechanism is not working. For example, when the clutch mechanism 24 is disengaged from both the second transmission member 22 and the fourth transmission member 23 , the transmission mechanism 100 can transmit torque through the second transmission member 22 and/or the fourth transmission member 23 .

The transmission mechanism according to the present invention can transmit torque in various ways, and can also realize reversing transmission and variable speed transmission, so it can be flexibly applied to various transmission environments and realize different transmission functions. In addition, the transmission mechanism of the present invention realizes the switching of the torque transmission direction through the hydraulic clutch mechanism, the execution speed is fast, the wear of mechanical parts is small, the service life of the transmission mechanism can be significantly prolonged, and intelligent control is easy to realize.

Although possible embodiments have been exemplarily described in the above description, it should be understood that there are still numerous variations of the embodiments through all known and otherwise readily conceivable combinations of technical features and implementations. Furthermore, it should be understood that the exemplary embodiment is merely an example, and that such embodiment in no way limits the scope, application, and configuration of the present invention. Through the foregoing description, it is more to provide the skilled person with a technical guidance for transforming at least one exemplary embodiment, wherein, as long as it does not depart from the scope of protection of the claims, various changes can be made, such as using other forms of Form-fit connection.

List of reference signs

100 transmission mechanism

11 Power input shaft

12 The first transmission member

13 Second transmission member

14 drive belt

21 PTO shaft

22 The third transmission member

23 The fourth transmission member

24 clutch mechanism

25 first top ring

25’ second top ring

221 first bearing

231 Second bearing

241 hydraulic cylinder

242 first piston member

242' second piston member

244 The first hydraulic chamber

244’ second hydraulic chamber

246 first fluid channel

246’ second fluid channel

247 sealing ring

248 The first clutch plate

248’ second clutch plate

249 Rotary output unit

Claims

A transmission mechanism, comprising:

power input shaft;

a first transmission member and a second transmission member fixedly arranged on the power input shaft;

PTO shaft;

A third transmission member and a fourth transmission member rotatably arranged on the power output shaft, wherein the first transmission member transmits the first torque to the third transmission member, and the second transmission member transmits the second torque to the fourth transmission member. torque; and

a clutch mechanism, the clutch mechanism is fixed on the power output shaft and located between the third transmission member and the fourth transmission member,

Wherein, the clutch mechanism is a hydraulic clutch mechanism, and the hydraulic clutch mechanism includes a hydraulic cylinder body fixed to the power output shaft, and a first chamber for accommodating the first piston member and a first chamber for accommodating the first piston member are formed in the hydraulic cylinder body. A second chamber of two piston members, a first piston member configured to be hydraulically drivable to disengage or engage a third transmission member, a second piston member configured to be hydraulically drivable to disengage from a fourth transmission member or join.
The transmission mechanism of claim 1, wherein the first torque is opposite in direction to the second torque.
The transmission mechanism according to claim 2, wherein the first transmission member and the third transmission member are pulleys, the second transmission member and the fourth transmission member are gears, and the transmission mechanism further includes A transmission member and a belt for a third transmission member.
The transmission mechanism according to claim 1, wherein the side of the first piston member facing away from the third transmission member forms a first hydraulic chamber, and the side of the second piston member facing away from the fourth transmission member forms a second hydraulic chamber, The first hydraulic chamber and the second hydraulic chamber are respectively in fluid communication with the hydraulic control mechanism through a first fluid passage and a second fluid passage formed inside the power output shaft.
The transmission mechanism according to claim 1, wherein the hydraulic cylinder body is integrally formed with the power output shaft.
The transmission mechanism according to claim 1, wherein the clutch mechanism further comprises a first clutch plate disposed between the first piston member and the third transmission member, and a first clutch plate disposed between the second piston member and the fourth transmission member between the second clutch plate.
The transmission mechanism according to claim 1, wherein the transmission mechanism further comprises a rotation output part integrally formed on the radially outer side of the clutch mechanism.
The transmission mechanism according to any one of claims 1 to 7, wherein both the first chamber and the second chamber are formed as annular grooves centered on the axis of the power output shaft, and the first piston member and said second piston member are annular piston members.
The transmission mechanism according to claim 8, wherein each of the first piston member and the second piston member has a plunger section and a rotation fixed section along the axial direction of the power output shaft, the The rotationally fixed section is fixed in a rotational direction relative to the hydraulic cylinder block by a fixing member.
The transmission mechanism according to claim 9, wherein an annular first sealing groove is formed on the inner peripheral surface of the first piston member or the second piston member or the outer peripheral surface of the plunger section, and the first chamber Or an annular second sealing groove corresponding to the first sealing groove is formed on the inner or outer peripheral surface of the second chamber, the first part of an elastic sealing ring is arranged in the first sealing groove and the The second part of the elastic sealing ring is arranged in the second sealing groove.