Transmission and electric drive system

Abstract

The utility model relates to the technical field of automobile parts, provide transmission and electric drive system, transmission includes first transmission spare and the second transmission spare of sleeveing on first transmission spare, and the first transmission spare and second transmission spare between are provided with the mechanism of uncoupling, and the mechanism of uncoupling includes: sliding claw, has the first working condition of engaging with first transmission spare and second transmission spare simultaneously, and the second working condition of engaging with one of first transmission spare and second transmission spare and clearance fit with another, driver and elastic piece cooperate with the both ends of sliding claw along the direction of motion respectively, and driver and elastic piece can drive sliding claw into first working condition and second working condition respectively, the utility model discloses through sliding claw, driver, elastic piece etc. the main component constitutes the mechanism of uncoupling, and its structure is simple, and the connection and uncoupling between the first transmission spare and second transmission spare of relative sleeveing can be conveniently realized.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically to transmission devices and electric drive systems. Background Technology

[0002] In mechanical transmission systems, the ability to disengage between transmission components is a core requirement for addressing the selective interruption of power transmission. Currently, disengagement designs in transmission systems are typically achieved through synchronizers, which are structurally complex. Furthermore, synchronizers are generally used between axially joined transmission components and are not suitable for connecting or disengaging radially nested transmission components.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this utility model, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0004] In view of this, the present invention provides a transmission device and an electric drive system that can achieve the connection and disconnection between nested transmission components through a simple structure.

[0005] According to one aspect of the present invention, a transmission device is provided, comprising a first transmission member and a second transmission member sleeved on the first transmission member, wherein a disengagement mechanism is provided between the first transmission member and the second transmission member, the disengagement mechanism comprising: a pawl having a first working state simultaneously engaging with both the first transmission member and the second transmission member, and a second working state engaging with one of the first transmission member and the second transmission member while having a clearance fit with the other; a driver and an elastic member respectively engaging with both ends of the pawl along the direction of movement, wherein the driver and the elastic member can respectively drive the pawl into the first working state and the second working state.

[0006] In some embodiments, the slipper is formed as a ring gear with a first tooth on both the inner and outer rings, and the outer wall of the first transmission member and the inner wall of the second transmission member are respectively provided with a second tooth that cooperates with the first tooth, and the distribution area of ​​the second tooth on the first transmission member and the second transmission member is different along the direction of movement.

[0007] In some embodiments, the distribution area of ​​the second tooth on the power input component of the first transmission member and the second transmission member is smaller than the distribution area on the power output component.

[0008] In some embodiments, the inner wall of the second transmission member includes a first-level inner wall and a second-level inner wall, wherein the inner diameter of the first-level inner wall is larger than the inner diameter of the second-level inner wall; the sliding pawl engages with the first-level inner wall, and in the first working state, the sliding pawl abuts against the side wall of the second-level inner wall.

[0009] In some embodiments, the second transmission member is provided with an annular groove and a plurality of through holes communicating with the annular groove, the outer diameter of the through holes being smaller than the outer diameter of the annular groove, the through holes being circumferentially spaced and formed between the inner wall of the first stage and the inner wall of the second stage; the driver includes: a pressure ring, including an annular main body portion disposed in the annular groove and a plurality of pressure arms passing through the through holes and contacting the slipper; a motor, cooperating with the main body portion, for driving the pressure ring to move along the movement direction; wherein, in the second working state, the main body portion abuts against the bottom wall of the annular groove.

[0010] In some embodiments, the motor contacts the main body via a rocker arm, the rocker arm being swung under the drive of the motor to abut or move away from the main body.

[0011] In some embodiments, the through hole, the pressure arm, and the elastic element each comprise a plurality of elements that are evenly spaced circumferentially.

[0012] In some embodiments, the transmission device further includes a bearing, which is interference-fitted between the first transmission member and the second transmission member, wherein the inner ring of the bearing is fixed to the first transmission member and the outer ring of the bearing is fixed to the inner wall of the second stage.

[0013] In some embodiments, the inner ring of the bearing is partially embedded in the first transmission member, and / or the inner ring of the bearing is fixed to the first transmission member by a snap ring.

[0014] In some embodiments, one end of the elastic member abuts against the sliding pawl and the other end abuts against the housing of the transmission device; or, the second transmission member is provided with a protruding stop portion, one end of the elastic member abuts against the sliding pawl and the other end abuts against the stop portion.

[0015] In some embodiments, the first transmission component is a shaft component, and the second transmission component is a gear component.

[0016] According to another aspect of the present invention, an electric drive system is provided, the electric drive system being configured with a transmission device as described in any of the above embodiments, wherein: the electric drive system includes at least two sets of gear transmission systems, the two sets of gear transmission systems being connected by an intermediate shaft, the intermediate shaft serving as a first transmission component, a transmission gear sleeved on the intermediate shaft serving as a second transmission component, and a disengagement mechanism being provided between the intermediate shaft and the transmission gear.

[0017] The beneficial effects of this utility model compared with the prior art include at least the following:

[0018] This invention utilizes a disengagement mechanism comprised of a sliding pawl, a driver, and an elastic element to connect and disconnect the first and second interlocking transmission components. When the driver / elastic element drives the sliding pawl into a first working state, the pawl engages with both the first and second transmission components simultaneously, causing them to move synchronously, such as rotating synchronously. When the elastic element / driver drives the sliding pawl into a second working state, the pawl engages with one of the first and second transmission components while maintaining a clearance fit with the other, thereby disengaging the first and second transmission components and breaking the power transmission. This invention's disengagement mechanism has a simple structure and can easily connect and disconnect the interlocking transmission components of a transmission device.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments conforming to the present invention and, together with the description, serve to explain the principles of the present invention. It is obvious that the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0021] Figure 1 This diagram illustrates the cooperative structure of the first transmission component, the second transmission component, and the disengagement mechanism of the transmission device in an embodiment of the present invention.

[0022] Figure 2 and Figure 3 This diagram shows a partial cross-sectional view of the transmission device in an embodiment of the present invention.

[0023] Figure 4 A schematic diagram of the electric drive system in an embodiment of this utility model is shown. Detailed Implementation

[0024] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0025] The accompanying drawings are merely illustrative of the present invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar structures, and therefore, repeated descriptions of them will be omitted.

[0026] The use of terms such as "first," "second," and similar words in the specific description does not indicate any order, quantity, or importance, but is merely used to distinguish different components. Terms such as "radial," "axial," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, in the description of the present invention, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection within two components.

[0027] It should be noted that, unless otherwise specified, the embodiments of this utility model and the features in different embodiments can be combined with each other.

[0028] Figure 1 The diagram illustrates the cooperative structure of the first transmission member, the second transmission member, and the disengagement mechanism of the transmission device in an embodiment of this utility model. (Refer to...) Figure 1 As shown, the transmission device provided in this embodiment of the present invention includes a first transmission member 100 and a second transmission member 200 sleeved on the first transmission member 100. A disengagement mechanism 300 is provided between the first transmission member 100 and the second transmission member 200. The disengagement mechanism 300 includes:

[0029] The slipper 310 has a first working state in which it simultaneously engages with the first transmission member 100 and the second transmission member 200, and a second working state in which it engages with one of the first transmission member 100 and the second transmission member 200 while having a clearance fit with the other.

[0030] The driver 320 and the elastic element 330 are respectively engaged with the two ends of the slider 310 along the Z direction of movement. The driver 320 and the elastic element 330 can respectively drive the slider 310 into the first working state and the second working state.

[0031] This invention utilizes a disengagement mechanism 300 composed of main components such as a sliding pawl 310, a driver 320, and an elastic element 330 to achieve the connection and disengagement between the nested first transmission member 100 and the second transmission member 200. When the driver 320 / elastic element 330 drives the sliding pawl 310 into a first working state, the sliding pawl 310 simultaneously engages with both the first transmission member 100 and the second transmission member 200, causing them to move synchronously, for example, rotate synchronously. When the elastic element 330 / driver 320 drives the sliding pawl 310 into a second working state, the sliding pawl 310 engages with one of the first transmission member 100 and the second transmission member 200 while maintaining a clearance fit with the other, thereby disengaging the first transmission member 100 from the second transmission member 200 and disconnecting the power transmission.

[0032] In specific implementation, when the driver 320 is working, it can drive the slider 310 into the first working state / second working state; when the driver 320 is not working, the elastic element 330 drives the slider 310 into the second working state / first working state. The driving methods of the driver 320 and the elastic element 330 can be set as needed. For example, the driver 320 can be used to drive the slider 310 into the second working state, and the elastic element 330 can be used to drive the slider 310 into the first working state, but this is not a limitation. The driver 320 can be a motor-driven, hydraulically driven, or other type of driver.

[0033] The disengagement mechanism 300 of this utility model has a simple structure and can easily realize the connection and disengagement between the interlocking transmission components of the transmission device.

[0034] In some embodiments, the pawl 310 is formed as a ring gear with first teeth T1 on both the inner and outer rings. The outer wall of the first transmission member 100 and the inner wall of the second transmission member 200 are respectively provided with second teeth T2 that mesh with the first teeth T1. Along the direction of movement Z, the distribution area of ​​the second teeth T2 on the first transmission member 100 and the second transmission member 200 is different. The direction of movement Z is along the extension direction of the first teeth T1 and the second teeth T2, specifically, axially. By designing that the second teeth T2 have different distribution areas on the first transmission member 100 and the second transmission member 200, the pawl 310 is always meshed with one of the first transmission member 100 and the second transmission member 200, while it can achieve meshing or clearance fit with the other by moving along the direction of movement Z.

[0035] In some embodiments, the distribution area of ​​the second tooth T2 on the power input component in the first transmission member 100 and the second transmission member 200 is smaller than the distribution area on the power output component. Thus, the pawl 310 is always engaged with the power output component in the first transmission member 100 and the second transmission member 200, and is either engaged with the power input component by movement or in a clearance fit. Therefore, when power transmission between the first transmission member 100 and the second transmission member 200 is disconnected, the pawl 310 does not follow the movement, which saves energy.

[0036] In some embodiments, the first transmission member 100 is a shaft component and the second transmission member 200 is a gear component, wherein the second transmission member 200 can be used as a power input component and the first transmission member 100 can be used as a power output component, but is not limited thereto.

[0037] Figure 2 and Figure 3 The diagram illustrates a partial cross-sectional view of the transmission device in an embodiment of this utility model, in conjunction with... Figures 1 to 3 As shown, in some embodiments, the inner wall of the second transmission member 200 includes a first-stage inner wall 210 and a second-stage inner wall 220, wherein the inner diameter of the first-stage inner wall 210 is larger than the inner diameter of the second-stage inner wall 220; the sliding pawl 310 engages with the first-stage inner wall 210, and in the first working state, the sliding pawl 310 abuts against the side wall 220' of the second-stage inner wall 220. This ensures that the sliding pawl 310 has a defined stroke in the first working state, guaranteeing accurate connection between the first transmission member 100 and the second transmission member 200, enabling them to move synchronously.

[0038] In some embodiments, the second transmission member 200 is provided with an annular groove 221 and a plurality of through holes communicating with the annular groove 221. The through holes are circumferentially spaced, and the outer diameter of the through holes is smaller than the outer diameter of the annular groove 221. The through holes are formed between the first-level inner wall 210 and the second-level inner wall 220. The driver 320 includes: a pressure ring 321, including an annular main body 321a disposed in the annular groove 221 and a plurality of pressure arms 321b passing through the through holes and contacting the slip pawl 310; and a motor 322, cooperating with the main body 321a, for driving the pressure ring 321 to move along the movement direction Z. In the second working state, the main body 321a abuts against the bottom wall 221' of the annular groove 221. The pressure ring 321 is integrally embedded in the slot of the second transmission member 200, which can reduce the space occupied by the disengagement mechanism and thus reduce the overall size of the transmission device. By abutting the main body 321a of the pressure ring 321 against the bottom wall 221' of the annular groove 221, the slide 310 has a defined stroke in the second working state, so as to avoid excessive movement and affect the overall stability of the transmission device.

[0039] In some embodiments, the motor 322 contacts the main body 321a via a rocker arm 323, which swings under the drive of the motor 322 to abut or move away from the main body 321a. The rocker arm 323 achieves point contact with the pressure ring 321, allowing the motor 322 to drive the rocker arm 323 to gently push the pressure ring 321, thereby moving the sliding pawl 310. This adapts to the high-speed operation of the transmission device. The motor 322 and the rocker arm 323 can be driven by a worm gear mechanism 324: the motor 322 drives the worm to rotate, the worm gear converts the rotational motion into reciprocating motion, driving the rocker arm 323 to swing around a fulcrum (fixed to the housing 400 of the transmission device) to push or move away from the pressure ring 321. Alternatively, the motor 322 and the rocker arm 323 can convert the rotational motion into reciprocating motion via a cam or other suitable component.

[0040] In some embodiments, the through hole of the second transmission member 200, the pressure arm 321b of the pressure ring 321, and the elastic member 330 each include a plurality of circumferentially evenly spaced members to achieve stable pushing of the annular slipper 310.

[0041] In some embodiments, the transmission device further includes a bearing 500, which is interference-fitted between the first transmission member 100 and the second transmission member 200, wherein the inner ring of the bearing is fixed to the first transmission member 100, and the outer ring of the bearing is fixed to the inner wall 220 of the second stage. The bearing 500 provides support for the first transmission member 100 and the second transmission member 200, enabling them to move stably relative to each other when the power connection is disconnected.

[0042] In some embodiments, the inner ring portion of the bearing 500 is embedded in the first transmission member 100, which can reduce the space occupied by the bearing 500 and make the bearing 500 and the first transmission member 100 stably cooperate; and / or, the inner ring of the bearing 500 is fixed to the first transmission member 100 by a snap ring to limit the displacement of the inner ring of the bearing 500.

[0043] In some embodiments, one end of the elastic member 330 abuts against the sliding pawl 310 and the other end abuts against the housing 400 of the transmission device; the specific structure formed can be referred to Figure 2 As shown. Alternatively, in some embodiments, the second transmission member 200 is provided with a stop portion 260, one end of the elastic member 330 abuts against the sliding pawl 310 and the other end abuts against the stop portion 260, and the specific structure formed can be referred to Figure 3As shown. In the embodiment where the other end of the elastic member 330 abuts against the stop portion 260, the elastic member 330 can move with the second transmission member 200, exhibiting higher adaptability; when space is limited in the transmission device and it is inconvenient to install the stop portion 260, the other end of the elastic member 330 can also abut against the housing 400. The sliding pawl 310, the stop portion 260, and the housing 400 can each be provided with grooves to accommodate the end of the elastic member 330, achieving a stable fit.

[0044] This utility model embodiment also provides an electric drive system, which is configured with a transmission device as described in any of the above embodiments, wherein: the electric drive system includes at least two sets of gear transmission systems, the two sets of gear transmission systems are connected by an intermediate shaft, the intermediate shaft serves as a first transmission component 100, the transmission gear sleeved on the intermediate shaft serves as a second transmission component 200, and a disengagement mechanism 300 is provided between the intermediate shaft and the transmission gear to realize the connection and disengagement of the intermediate shaft and the transmission gear.

[0045] Figure 4 The structure of the electric drive system in an embodiment of this utility model is illustrated, with reference to... Figure 4 and combined Figures 1 to 3 As shown, in some embodiments, the electric drive system may specifically include: an engine 610, connected to a generator 650 via a torsional damper 620, a clutch 630, and a planetary gear train 640. The engine 610 and the generator 650 are also connected to a differential 670 via parallel shaft gear trains (660a, 660b) to transmit power to the wheel ends. The parallel shaft gear trains (660a, 660b) include a first gear transmission system 660a and a second gear transmission system 660b. The first gear transmission system 660a and the second gear transmission system 660b are connected by an intermediate shaft 662, which serves as the first transmission component. A transmission gear 663 sleeved on the intermediate shaft 662 serves as the second transmission component. A disengagement mechanism 300 is provided between the intermediate shaft 662 and the transmission gear 663, which can realize the connection and disengagement of the intermediate shaft 662 and the transmission gear 663 according to the operating conditions of the electric drive system. For example, when the intermediate shaft 662 is connected to the transmission gear 663, the engine 610 and the generator 650 can drive the wheel end to rotate; when the intermediate shaft 662 is disengaged from the transmission gear 663, the electric drive system can enter the power generation mode.

[0046] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A transmission device, comprising a first transmission member and a second transmission member sleeved on the first transmission member, characterized in that, A disengagement mechanism is provided between the first transmission member and the second transmission member, the disengagement mechanism comprising: The sliding pawl has a first working state in which it simultaneously engages with the first transmission member and the second transmission member, and a second working state in which it engages with one of the first transmission member and the second transmission member while having a clearance fit with the other. The driver and the elastic element respectively cooperate with the two ends of the slider along the direction of movement, and the driver and the elastic element can respectively drive the slider into the first working state and the second working state.

2. The transmission device as described in claim 1, characterized in that, The slipper is formed as a ring gear with a first tooth on both the inner and outer rings. The outer wall of the first transmission member and the inner wall of the second transmission member are respectively provided with a second tooth that mates with the first tooth, and the distribution area of ​​the second tooth on the first transmission member and the second transmission member is different along the direction of movement.

3. The transmission device as described in claim 2, characterized in that, The distribution area of ​​the second tooth on the power input component of the first and second transmission components is smaller than the distribution area on the power output component.

4. The transmission device as described in claim 1, characterized in that, The inner wall of the second transmission component includes a first-stage inner wall and a second-stage inner wall, wherein the inner diameter of the first-stage inner wall is larger than the inner diameter of the second-stage inner wall. The sliding claw engages with the inner wall of the first stage, and in the first working state, the sliding claw abuts against the side wall of the inner wall of the second stage.

5. The transmission device as described in claim 4, characterized in that, The second transmission component is provided with an annular groove and a plurality of through holes communicating with the annular groove. The outer diameter of the through holes is smaller than the outer diameter of the annular groove. The through holes are circumferentially spaced and formed between the inner wall of the first stage and the inner wall of the second stage. The driver includes: The pressure ring includes an annular main body disposed in the annular groove and a plurality of pressure arms passing through the through hole and contacting the sliding claw; A motor, in cooperation with the main body, is used to drive the pressure ring to move along the direction of motion; In the second working state, the main body abuts against the bottom wall of the annular groove.

6. The transmission device as described in claim 5, characterized in that, The motor contacts the main body via a rocker arm, which is used to swing under the drive of the motor to abut or move away from the main body.

7. The transmission device as described in claim 5, characterized in that, The through hole, the pressure arm, and the elastic element each comprise a plurality of components evenly spaced circumferentially.

8. The transmission device as described in claim 4, characterized in that, Also includes: The bearing is press-fitted between the first transmission component and the second transmission component, wherein the inner ring of the bearing is fixed to the first transmission component and the outer ring of the bearing is fixed to the inner wall of the second stage.

9. The transmission device as described in claim 8, characterized in that, The inner ring of the bearing is partially embedded in the first transmission component, and / or the inner ring of the bearing is fixed to the first transmission component by a snap ring.

10. The transmission device as claimed in claim 1, characterized in that, One end of the elastic element abuts against the sliding claw and the other end abuts against the housing of the transmission device; Alternatively, the second transmission member is provided with a stop portion, with one end of the elastic member abutting the sliding pawl and the other end abutting the stop portion.

11. The transmission device according to any one of claims 1-10, characterized in that, The first transmission component is a shaft component, and the second transmission component is a gear component.

12. An electric drive system, characterized in that, The electric drive system is configured with a transmission device as described in any one of claims 1 to 11, wherein: The electric drive system includes at least two sets of gear transmission systems, which are connected by an intermediate shaft. The intermediate shaft serves as a first transmission component, and the transmission gear sleeved on the intermediate shaft serves as a second transmission component. A disengagement mechanism is provided between the intermediate shaft and the transmission gear.

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