Transmission control mechanism and vehicle

Abstract

The invention provides a transmission control mechanism and a vehicle, and belongs to the field of vehicle power systems.The transmission control mechanism comprises a piston cylinder and a transmission part which are sequentially arranged on a power transmission shaft in a sleeving mode in the axial direction of the power transmission shaft. The piston cylinder comprises a cylinder body, a piston arranged in the cylinder body in a sliding mode and an elastic piece arranged between the piston and the cylinder body, the piston can synchronously rotate along with the power transmission shaft, and a power joint structure is arranged between the piston and the transmission piece. When the piston is pushed by oil liquid entering the cylinder body to slide towards the transmission part, the elastic part stores energy, the piston and the transmission part can be connected through the power connection structure to form a power transmission path, when the oil liquid flows out of the cylinder body, the elastic part releases energy to drive the piston to return, and connection of the power connection structure can be relieved. According to the transmission control mechanism, power transmission between the power transmission shaft and the transmission shaft can be cut off, and compared with a pure mechanical control mode, the impact abnormal sound between parts can be effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle power systems, and in particular to a transmission control mechanism. The present invention also relates to a vehicle provided with the transmission control mechanism. Background Art

[0002] The hybrid transmission is one of the core components of hybrid vehicles. Its main function is to coordinate the power output of the engine and the motor, and to achieve effective combination and switching between different power sources. In a hybrid transmission, when the engine is in direct drive mode, the motor does not actively provide power. If the power transmission path between the motor and the transmission chain remains connected, the motor's own rotating parts will rotate due to the drive of the transmission chain. Therefore, the rotor, stator and other components inside the motor will generate certain friction losses during the rotation process, resulting in a large system load and reduced efficiency. Summary of the invention

[0003] In view of this, the present invention aims to provide a transmission control mechanism to disconnect the power transmission between the power transmission shaft and the transmission member.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A transmission control mechanism comprises a piston cylinder and a transmission member which are sequentially sleeved on the power transmission shaft along the axial direction of the power transmission shaft;

[0006] The piston cylinder comprises a cylinder body, a piston slidably arranged in the cylinder body, and an elastic member arranged between the piston and the cylinder body, the piston can rotate synchronously with the power transmission shaft, and a power engagement structure is arranged between the piston and the transmission member;

[0007] When the piston is pushed by the oil entering the cylinder body to slide toward the transmission member, the elastic member stores energy, and the power engagement structure enables the piston to engage with the transmission member to form a power transmission path; when the oil flows out of the cylinder body, the elastic member releases energy to drive the piston back to its original position, thereby releasing the engagement of the power engagement structure.

[0008] Furthermore, an oil circuit is provided on the power transmission shaft, and the cylinder body is connected with an oil passage on the transmission housing through the oil circuit.

[0009] Further, at least a portion of the oil circuit extends along the axial direction of the power transmission shaft and is connected to the oil passage through an oil guide structure located at one end of the power transmission shaft;

[0010] The oil guide structure includes a connecting pipe inserted into the oil circuit, and a connecting plate connected to the connecting pipe. The connecting plate and the transmission housing are surrounded to form an oil storage cavity which is communicated with the oil channel.

[0011] Furthermore, the power transmission shaft includes a first shaft body, and a second shaft body with one end inserted into the first shaft body, and the first shaft body and the second shaft body can rotate relative to each other;

[0012] The piston cylinder is arranged on the first shaft body, the transmission member is arranged on the second shaft body, the oil circuit includes a main body arranged on the second shaft body, and an annular portion arranged between the first shaft body and the second shaft body, the main body extends along the axial direction of the second shaft body, and the annular portion is connected to the cylinder body through a connecting hole arranged on the first shaft body.

[0013] Further, the piston and the first shaft are connected together through a spline connection structure; and / or,

[0014] The transmission member includes a transmission gear arranged on the second shaft.

[0015] Furthermore, the elastic member includes a wave spring disposed between the cylinder body and the piston.

[0016] Furthermore, the power engagement structure includes an insertion protrusion provided on the piston, and a slot provided on the transmission member;

[0017] When the piston slides toward the transmission member, the insertion protrusion is inserted into the slot and can abut against the transmission member, and a power transmission path is formed through the friction force between the two.

[0018] Furthermore, the insertion protrusion is in a conical structure with a cross-section gradually decreasing along the direction pointing to the transmission member.

[0019] Furthermore, a carbon ring is provided on the insertion protrusion and / or in the slot, and the insertion protrusion abuts against the transmission member through the carbon ring.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] The transmission control mechanism described in the present invention is configured with a piston cylinder provided with an elastic part, and when the piston is pushed by the oil entering the cylinder body, the power engagement structure can enable the piston to engage with the transmission part to form a power transmission path, and when the oil flows out of the cylinder body, the elastic part releases energy to drive the piston back to its position, thereby releasing the engagement of the power engagement structure. Not only can the power transmission between the power transmission shaft and the transmission part be disconnected, but also, compared with a purely mechanical control method, the impact and abnormal noise between components can be effectively reduced; at the same time, the elastic part can also play a buffering role, thereby extending the service life of the transmission components.

[0022] In addition, by providing an oil circuit on the power transmission shaft, it is not only helpful to reduce the weight of the power transmission shaft, but also the structure of the power transmission shaft itself can be fully utilized. There is no need to lay additional complex oil pipelines to connect the cylinder body and the oil channel, which can effectively save space; and, with the help of the high strength characteristics of the power transmission shaft itself, it can better ensure that the oil supply passage between the cylinder body and the oil channel remains unobstructed, thereby ensuring the normal operation of the transmission control mechanism.

[0023] The portion of the oil circuit extending axially along the power transmission shaft can better adapt to the mechanical characteristics of the power transmission shaft during rotation, and reduce the oil flow obstruction or interference to power transmission caused by unreasonable oil circuit direction; and the oil guide structure includes a connecting pipe, and a connecting plate that is surrounded by the transmission case to form an oil storage chamber, which not only facilitates the connection between the oil guide structure and the power transmission shaft, but also the oil storage chamber can not only buffer the oil flowing in from the oil circuit and maintain a stable supply of oil to ensure the normal operation of the transmission control mechanism, but also the oil storage chamber also helps to preliminarily precipitate impurities in the oil, which is beneficial to ensure the control accuracy of the transmission control mechanism.

[0024] Secondly, the power transmission shaft includes a first shaft body and a second shaft body that can rotate relative to each other, which can more accurately control the transmission path and method of power between different components to meet various transmission requirements; the oil circuit is set on the second shaft body, which is also convenient for connecting with the oil circuit on the transmission housing and transmitting oil. The piston and the first shaft body are connected together through a spline connection structure, which can achieve accurate circumferential centering, ensuring that the axis of the piston always coincides with the axis of the first shaft body during the rotation of the first shaft body, thereby ensuring the stability of the piston when sliding in the cylinder body, avoiding problems such as uneven friction and increased wear caused by eccentric rotation; and the transmission parts include transmission gears, which are convenient for meshing with other gears, thereby realizing the functions of power transmission and speed change between different components, and can have a better power transmission effect.

[0025] Furthermore, the elastic member includes a wave spring disposed between the cylinder body and the piston. Compared with the traditional cylindrical coil spring, the wave spring can have a smaller axial dimension while providing a considerable elastic force, thereby reducing the axial space occupied by the piston cylinder and helping to maintain the compactness of the entire transmission control mechanism. Moreover, the wave spring exhibits nonlinear elastic force characteristics. During the power engagement process, when the piston is initially pushed by the oil to slide toward the transmission member, the slow increase in elastic force of the wave spring can allow the piston to move relatively smoothly. When the piston approaches the fully engaged position, the rapid increase in elastic force can ensure that the power engagement structure is tightly engaged, thereby providing sufficient holding force to maintain the stability of power transmission.

[0026] In addition, the power engagement structure includes an insertion protrusion provided on the piston and a slot provided on the transmission member, which has a simple structure and is easy to process and manufacture; moreover, a power transmission path is formed by the frictional engagement between the insertion protrusion and the slot, which is not a sudden rigid connection. When the piston is first inserted into the slot, the friction is relatively small. As the friction gradually increases, the power transmission also gradually increases. This progressive power transmission establishment process can effectively alleviate the impact that may occur during power engagement.

[0027] In addition, by setting the insertion protrusion as a tapered structure with a gradually decreasing cross section in the direction pointing to the transmission member, it is convenient to set the insertion protrusion in the slot, which can reduce excessive friction and collision that may be caused by insertion difficulties, and can extend the service life of both, thereby improving the reliability and durability of the transmission control machine. The insertion protrusion and the transmission member are abutted by the carbon ring, which can increase the friction between the two, enable the piston and the transmission member to be quickly engaged together, and have good reliability, thereby improving the response efficiency and reliability of the transmission control mechanism.

[0028] Another object of the present invention is to provide a vehicle, wherein the power system of the vehicle is provided with the transmission control mechanism as described above.

[0029] The vehicle described in the present invention, by providing the transmission control mechanism as described above, can not only disconnect the power transmission between the power transmission shaft and the transmission member, but also, compared with a purely mechanical control method, can effectively reduce the impact and abnormal noise between components; at the same time, the elastic member can also play a buffering role, which can extend the service life of the transmission components and reduce the maintenance cost of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0031] Figure 1 It is an application state diagram of the transmission control mechanism according to an embodiment of the present invention;

[0032] Figure 2 for Figure 1 A schematic diagram of the structure shown in another viewing angle;

[0033] Figure 3 for Figure 2 Sectional view along line AA;

[0034] Figure 4 for Figure 3 A magnified view of part B;

[0035] Figure 5 It is a structural schematic diagram of the transmission control mechanism according to an embodiment of the present invention;

[0036] Figure 6 is a schematic structural diagram of a second shaft according to an embodiment of the present invention;

[0037] Figure 7 is a cross-sectional view of the second shaft body according to an embodiment of the present invention;

[0038] Figure 8 It is a structural schematic diagram of a retaining ring according to an embodiment of the present invention;

[0039] Fig. 9 It is a structural schematic diagram of a transmission gear according to an embodiment of the present invention;

[0040] Fig.10 This is a structural schematic diagram of the oil guide structure according to an embodiment of the present invention;

[0041] Fig.11 It is a structural schematic diagram of a piston cylinder according to an embodiment of the present invention;

[0042] Fig.12 for Fig.11 Sectional view of the mid-CC line;

[0043] Fig.13 It is a structural schematic diagram of a cylinder body according to an embodiment of the present invention;

[0044] Fig.14 It is a structural schematic diagram of a piston according to an embodiment of the present invention;

[0045] Fig.15 It is a structural schematic diagram of the piston according to an embodiment of the present invention from another viewing angle;

[0046] Fig.16 It is a schematic structural diagram of the wave spring described in an embodiment of the present invention.

[0047] Description of reference numerals:

[0048] 1. Power transmission shaft; 2. Piston cylinder; 3. Transmission gear; 4. First bearing; 5. Oil guide structure; 6. Snap ring; K. Spline connection structure; M. Main body;

[0049] 101, first shaft body; 1011, communicating hole;

[0050] 102, second shaft body; 1021, annular groove; 1022, through hole; 1023, convex ring; 1024, sealing groove; 1025, clamping groove; 1026, limiting protrusion;

[0051] 201, cylinder body; 2011, fixing hole; 2012, positioning protrusion; 2013, process hole; 202, piston; 2021, insertion protrusion; 2022, mounting hole; 2023, weight reduction groove; 203, corrugated spring; 2031, positioning hole;

[0052] 301, slot;

[0053] 501. Connecting plate; 502. Connecting pipe. DETAILED DESCRIPTION

[0054] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0055] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0056] In the description of the present invention, it should be noted that if there are terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc., they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first", "second", etc., they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0057] In addition, in the description of the present invention, unless otherwise clearly defined, the mating parts may be connected by conventional connection structures in the art. Moreover, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. 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 it can be an indirect connection through an intermediate medium, or it can be a communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0058] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0059] In view of the following problems in the hybrid transmission in the prior art, when the engine is in direct drive mode, the motor does not actively provide power. If the power transmission path between the motor and the transmission chain remains connected, the rotating parts of the motor itself will rotate due to the drive of the transmission chain, resulting in a large system load and reduced efficiency. Therefore, this embodiment proposes a transmission control mechanism, including a piston cylinder 2 and a transmission member sequentially sleeved on the power transmission shaft 1 along the axial direction of the power transmission shaft 1.

[0060] The piston cylinder 2 includes a cylinder body 201, a piston 202 slidably disposed in the cylinder body 201, and an elastic member disposed between the piston 202 and the cylinder body 201. The piston 202 can rotate synchronously with the power transmission shaft 1, and a power engagement structure is provided between the piston 202 and the transmission member. When the piston 202 is pushed by the oil entering the cylinder body 201 to slide toward the transmission member, the elastic member stores energy, and the power engagement structure can enable the piston 202 to engage with the transmission member to form a power transmission path. When the oil flows out of the cylinder body 201, the elastic member releases energy to drive the piston 202 back to its original position, and the engagement of the power engagement structure can be released.

[0061] The transmission control mechanism of this embodiment is provided with a piston cylinder 2 provided with an elastic member, and when the piston 202 is pushed by the oil, the power engagement structure can make the piston 202 engage with the transmission member to form a power transmission path, and when the oil flows out of the cylinder body 201, the elastic member releases energy to drive the piston 202 back to release the engagement of the power engagement structure, which can not only disconnect the power transmission between the power transmission shaft 1 and the transmission shaft, but also effectively reduce the impact and abnormal sound between the components compared with the purely mechanical control method. At the same time, at the moment of power engagement or when the load changes suddenly, the elastic member can effectively alleviate the impact and extend the service life of the transmission components.

[0062] In addition, the transmission control mechanism of this embodiment is designed to arrange the piston cylinder 2 and the transmission member in sequence along the axial direction of the power transmission shaft 1, so that the entire transmission control mechanism has a compact structure. Compared with some complex multi-dimensional layout transmission control devices, this axial layout is more conducive to achieving efficient power control in a limited space. In applications such as automobiles that have high space requirements, installation space can be saved, which facilitates the layout and integration of the entire power transmission system. In addition, the piston 202 and the elastic member are integrated in the cylinder body 201. This highly integrated design can reduce additional connecting components and complex transmission links, which is conducive to improving the overall reliability and stability of the transmission control mechanism.

[0063] Based on the above design concept, an exemplary structure of the transmission control mechanism of this embodiment is as follows: Figures 1 to 4 shown in and Figure 4 The arrows indicate the oil flow path when the power transmission shaft 1 is engaged with the transmission member. The power transmission shaft 1 of this embodiment is specifically described by taking the motor shaft of a motor as an example, and the power transmission shaft 1 is rotatably arranged in the transmission housing through a first bearing 4, and an oil passage connected to the hydraulic module is provided on the transmission housing. In addition, in order to facilitate the description of the transmission control mechanism of this embodiment, the transmission housing and the hydraulic module are not shown in the figure, and they are not improved in this embodiment, and the prior art can be directly referred to. Here, it can be understood that the power transmission shaft 1 can be other shafts that can transmit power in addition to the motor shaft of the motor.

[0064] In this embodiment, as a preferred embodiment, an oil circuit is provided on the power transmission shaft 1, and the cylinder 201 is connected to the oil passage on the transmission housing through the oil circuit. Such a configuration is not only conducive to reducing the weight of the power transmission shaft 1 and reducing energy loss, but also can make full use of the structure of the power transmission shaft 1 itself, without the need to lay additional and complex oil pipe lines to connect the cylinder 201 and the oil passage, thereby effectively saving space and avoiding a cluttered layout caused by laying too many oil pipes.

[0065] In addition, compared with using an external independent oil pipe connection, arranging the oil circuit on the power transmission shaft 1 can make the oil circuit less susceptible to loosening or damage due to interference from external factors such as vibration, collision, etc., because the power transmission shaft 1 itself is a relatively fixed and high-strength component in the transmission system. This can help ensure that the oil supply passage between the cylinder body 201 and the oil channel always remains unobstructed, thereby ensuring the normal operation of the transmission control mechanism.

[0066] As a further embodiment, at least part of the oil circuit extends along the axial direction of the power transmission shaft 1, and is connected to the oil passage through an oil guide structure 5 located at one end of the power transmission shaft 1. In addition, the oil guide structure 5 includes a connecting pipe 502 inserted into the oil circuit, and a connecting plate 501 connected to the connecting pipe 502, and the connecting plate 501 and the transmission housing are surrounded to form an oil storage cavity connected to the oil passage.

[0067] In this embodiment, by providing an oil guide structure 5 with an oil storage chamber formed with the transmission housing, on the one hand, the oil flowing in from the oil channel can be buffered. When the oil supply fluctuates briefly, the oil storage chamber can use its own oil storage capacity to maintain a stable supply of oil for a certain period of time, ensuring that the transmission control mechanism will not work abnormally due to the instantaneous change in the oil supply. On the other hand, the oil storage chamber also helps to initially precipitate impurities in the oil, because the flow rate of the oil will be relatively slow after entering the oil storage chamber, and some heavier impurity particles will settle at the bottom of the oil storage chamber, thereby protecting the subsequent transmission control mechanism components from erosion by impurities to a certain extent, and extending the service life of the transmission control mechanism.

[0068] Here, as a preferred embodiment, Figure 4 As shown in , in this embodiment, the power transmission shaft 1 includes a first shaft body 101, and a second shaft body 102 with one end inserted into the first shaft body 101, and the first shaft body 101 and the second shaft body 102 can rotate relative to each other. In addition, the piston cylinder 2 is arranged on the first shaft body 101, the transmission member is arranged on the second shaft body 102, and the oil circuit includes a main body M arranged on the second shaft body 102, and an annular part arranged between the first shaft body 101 and the second shaft body 102, the main body M extends along the axial direction of the second shaft body 102, and the annular part is connected to the cylinder body 201 through a connecting hole 1011 arranged on the first shaft body 101.

[0069] In this embodiment, the power transmission shaft 1 is composed of a first shaft body 101 and a second shaft body 102, and the two can rotate relative to each other, thereby allowing the first shaft body 101 and the second shaft body 102 to rotate relative to each other, and the transmission path and method of power between different components can be accurately controlled to meet complex and diverse transmission requirements. Extending the main part M of the oil circuit along the axial direction of the second shaft body 102 can better adapt to the mechanical characteristics of the second shaft body 102 during the rotation process, and reduce the flow obstruction of the oil or the interference with the power transmission caused by the unreasonable direction of the oil circuit. The annular part of the oil circuit realizes the connection between the main part M and the cylinder body 201 on the first shaft body 101.

[0070] Specifically, in this embodiment, the rotor of the motor is specifically arranged on the first shaft 101, and the structure of the first shaft 101 can refer to the structure of the drive shaft of the existing motor. The difference from the drive shaft structure of the existing motor is that Figure 3 As shown in , a socket with an open end is formed on the first shaft body 101, and the second shaft body 102 is rotatably arranged in the socket through a second bearing, and the transmission member rotates synchronously with the second shaft body 102.

[0071] More specifically, combined with Figures 4 to 6 As shown in FIG. 1 , a groove 1025 and a convex ring 1023 are provided at one end of the second shaft body 102 inserted into the first shaft body 101, and a retaining spring is provided in the groove 1025. The second bearing is restricted between the retaining spring and the convex ring 1023. Figure 5 and Figure 6 As shown in FIG. 1 , an annular groove 1021 is provided on the second shaft body 102 adjacent to the convex ring 1023 and arranged along the circumference of the second shaft body 102. The annular portion of the oil circuit is formed by the annular groove 1021 and the inner wall of the insertion hole on the first shaft body 101.

[0072] At this time, in order to facilitate the oil to quickly flow into the cylinder body 201, or to quickly flow out of the cylinder body 201, as a preferred embodiment, Figure 7 As shown in FIG. 1 , in this embodiment, a plurality of through holes 1022 are arranged at intervals along the circumference of the second shaft body 102, and the annular groove 1021 is connected to the main part M of the oil circuit through the through holes 1022. At the same time, the connecting holes 1011 on the first shaft body 101 are also arranged at intervals along the circumference of the second shaft body 102. At this time, in order to improve the sealing performance of the annular part, as shown in FIG. Figure 6 and Figure 7 As shown in FIG. 1 , two sealing grooves 1024 located on both sides of the annular groove 1021 are provided on the second shaft body 102 , and the second shaft body 102 is abutted against by sealing rings provided in the sealing grooves 1024 .

[0073] In this embodiment, by providing multiple through holes 1022 and connecting holes 1011 arranged at intervals along the circumference of the power transmission shaft 1, it is conducive to achieving uniform supply and reflux of oil. During the power engagement operation, the oil can enter the cylinder 201 more evenly through the multiple connecting holes 1011 and the through holes 1022, and push the piston 202 to move, avoiding the uneven supply of oil that may occur due to only a single connecting hole 1011 or through hole 1022, resulting in uneven force on the piston 202, thereby affecting the stability of the power engagement. At the same time, the provision of multiple connecting holes 1011 and multiple through holes 1022 can provide a redundant design. Even if one of the connecting holes 1011 or the through hole 1022 is blocked or has other faults, the remaining connecting holes 1011 and the through hole 1022 can still ensure a certain degree of oil connection, so that the transmission control mechanism will not be completely unable to work normally due to problems with a single connecting hole 1011 and the through hole 1022, thereby improving the reliability of the entire transmission control mechanism.

[0074] Furthermore, as a further embodiment, Figure 4 As shown in , the axis of the connecting hole 1011 is set at an acute angle to the axis of the first shaft body 101. With such a setting, compared with the vertical setting between the axis of the connecting hole 1011 and the axis of the first shaft body 101, the resistance encountered by the oil when flowing into the cylinder body 201 is smaller, which is conducive to the rapid flow of the oil into or out of the cylinder body 201, thereby improving the control flexibility of the transmission control mechanism. Among them, the angle between the axis of the connecting hole 1011 and the axis of the first shaft body 101 can be specifically set between 45°-55°. This angle range ensures that when the oil flows through the connecting hole 1011, the flow direction will not change too drastically due to a too small angle, resulting in excessive local resistance, nor will the steering effect of the oil be unclear due to a too large angle.

[0075] In addition, combined Figure 4 , Figure 7 and Figure 8 As shown in FIG. 1 , in order to limit the axial displacement of the first bearing 4, a limiting protrusion 1026 protruding outward in the radial direction is provided at the other end of the second shaft body 102, and a retaining ring 6 is provided at its end. The first bearing 4 is arranged between the limiting protrusion 1026 and the retaining ring 6. Moreover, in order to facilitate the overall lightweight design, as shown in FIG. Figure 6 and Figure 7 As shown in , the limiting protrusion 1026 is in the shape of a truncated cone. In addition, in order to facilitate the connection between the retaining ring 6 and the second shaft body 102, a connecting tube protruding outward along its axial direction is provided on the retaining ring 6, and the retaining ring 6 is screwed into the second shaft body 102 through the connecting tube.

[0076] It should be noted that, in addition to threading the retaining ring 6 into the second shaft body 102 via the connecting tube, the retaining ring 6 may also be press-fitted onto the second shaft body 102 by interference fit.

[0077] In addition, as a preferred embodiment, Figure 1 and Figure 2 As shown in , the transmission member of this embodiment includes a transmission gear 3 arranged on the second shaft 102. This design can facilitate the transmission member to mesh with other gears, thereby realizing the functions of power transmission and speed change between different components, and can have a better power transmission effect. At this time, in order to realize the synchronous rotation of the transmission gear 3 and the second shaft 102, as shown in FIG. Figure 6 and Fig. 9 As shown in , the transmission gear 3 and the second shaft body 102 of this embodiment are connected together through a spline connection structure K. In addition, one end of the transmission gear 3 abuts against the above-mentioned limit stop 1026 protrusion, and the other end abuts against the retaining spring provided on the second shaft body 102, thereby limiting the axial displacement of the transmission gear 3.

[0078] In addition, in order to further improve the transmission effect, such as Fig. 9 As shown in , the transmission gear 3 of this embodiment is a helical gear. As a result, its gear teeth can gradually enter and disengage from the meshing, which can effectively reduce the vibration and impact during the transmission process, make the power transmission more stable and continuous, and can also reduce the noise caused by the collision, providing a more comfortable transmission experience.

[0079] Here, it should be noted that the power output shaft includes the first shaft body 101 and the second shaft body 102 which are separately arranged, and the transmission member rotates synchronously with the second shaft body 102. The power transmission shaft 1 can also be an integrated structure. In this case, the transmission member needs to be loosely sleeved on the power transmission shaft 1 so as to be able to rotate relative to the power transmission shaft 1. In addition, the transmission member can be a transmission sprocket or other structures in addition to the transmission gear 3.

[0080] An exemplary structure of the oil guide structure 5 of this embodiment is as follows Fig.10 As shown in , the connecting disk 501 is arranged to expand radially outward along the connecting tube 502, and an oil groove with an open end is formed on the connecting disk 501. In addition, in order to ensure the sealing effect of the oil circuit, a groove body is provided on the connecting tube 502, and abuts against the second shaft body 102 through a sealing ring provided in the groove body.

[0081] As a specific embodiment, the structure of the piston cylinder 2 of this embodiment is as follows: Fig.11 and Fig.12 As shown in FIG. 1 , the cylinder body 201 is in the form of a ring around the first shaft body 101 and is formed with the second shaft body 102 to form a cavity connected to the oil circuit. Fig.13 As shown in FIG. 1 , a receiving groove is formed with an open end, and a mounting hole 2022 connected to the receiving groove is provided at the other end. The cylinder body 201 is press-fitted on the first shaft body 101 through the mounting hole 2022. The structure of the piston 202 is shown in FIG. Fig.14 and Fig.15 As shown in , it is sealed at one end of the open end of the receiving groove and abuts against the inner wall of the cylinder body 201 through a sealing ring arranged on its outer wall.

[0082] In addition, the piston 202 is connected to the first shaft body 101 through a spline connection structure K. Since the spline connection structure K can achieve accurate circumferential centering, it is ensured that the axis of the piston 202 always coincides with the axis of the first shaft body 101 during the rotation of the first shaft body 101, thereby ensuring the stability of the piston 202 when sliding in the cylinder body 201, and avoiding problems such as uneven friction and increased wear that may be caused by eccentric rotation. Moreover, the spline connection structure K can effectively transfer torque from the first shaft body 101 to the piston 202 by virtue of its multi-key tooth matching method, meeting the power requirements during the transmission process. At the same time, the spline connection structure K can also guide the sliding of the piston 202, so that it slides accurately along the predetermined direction, further ensuring that the power coupling structure and the transmission member can be accurately connected, and realizing effective transmission or separation of power.

[0083] Of course, the piston 202 and the first shaft body 101 may be connected together by conventional slide grooves and sliders in addition to the spline connection structure K. In addition, it should be noted that in addition to setting the oil circuit on the power transmission shaft 1, a pipeline external to the hydraulic module may also be used.

[0084] In addition, combined Figure 4 , Fig. 9 , Fig.14 and Fig.15 As shown in , as a preferred embodiment, the power engagement structure of this embodiment includes an insertion protrusion 2021 provided on the piston 202, and a slot 301 provided on the transmission member. When the piston 202 slides toward the transmission member, the insertion protrusion 2021 is inserted into the slot 301 and can abut against the transmission member, and the friction force between the two is engaged to form a power transmission path. Fig. 9 As shown in FIG. 1 , the slot 301 on the transmission gear 3 is a tapered slot arranged in accordance with the insertion protrusion 2021. The insertion protrusion 2021 of this embodiment is combined with the first shaft body 101 through a spline connection structure K.

[0085] The power engagement structure of this embodiment adopts the form of plug-in protrusion 2021 and slot 301, which has a simple structure and does not require a complex mechanical interlocking device. It can achieve power transmission by relying on simple geometric shape matching and friction, which can avoid power transmission interruption caused by improper matching of too many parts, thereby greatly improving the reliability of the entire transmission control mechanism. Moreover, at the moment of power engagement, since the power transmission relationship is gradually established through friction rather than a sudden rigid connection, it has a certain buffering effect, which can effectively alleviate the impact that may occur during power engagement and protect other components in the transmission system from damage caused by sudden impact force.

[0086] As a further embodiment, Figure 4 and Fig.14 As shown in , the insertion protrusion 2021 of this embodiment is a tapered structure with a gradually decreasing cross-section in the direction pointing to the transmission member. This structure enables the insertion protrusion 2021 to be inserted into the slot 301 more smoothly, thereby accelerating the speed of power engagement and significantly improving the response efficiency of the transmission control mechanism. At the same time, since the tapered insertion protrusion 2021 can cooperate with the slot 301 more smoothly during the insertion and engagement process, it can effectively reduce excessive friction and collision that may be caused by difficult insertion or unsmooth engagement, and can extend the service life of both, thereby reducing the maintenance cost of the transmission control mechanism and even the entire transmission system.

[0087] Moreover, when the insertion protrusion 2021 is a small distance away from the transmission gear 3, the two can be disconnected without completely removing the insertion protrusion 2021 from the slot 301, thereby effectively reducing the axial space occupied by the transmission control mechanism and improving the compactness of the transmission structure. In addition, the insertion protrusion 2021 and the slot 301 can also be allowed to have a large overlap length in the axial direction, so that the two can have a large contact area after being joined together, thereby maintaining the reliability of the engagement of the two.

[0088] In addition, in order to obtain a better use effect, a carbon ring is provided on the insertion protrusion 2021 and / or in the slot 301, and the insertion protrusion 2021 and the transmission member are in contact with each other through the carbon ring. Such a configuration can increase the friction between the two, enable the piston 202 and the transmission member to be quickly engaged together, and have good reliability, thereby improving the control flexibility and reliability of the transmission control mechanism. Among them, as a specific embodiment, Figure 4 As shown in , in order to facilitate processing and manufacturing, the carbon ring of this embodiment is specifically arranged on the insertion protrusion 2021.

[0089] It is understandable that, in addition to setting the carbon ring on the insertion protrusion 2021, the carbon ring can also be set in the slot 301, or the carbon ring can be set in both the insertion protrusion 2021 and the slot 301. Moreover, the connection method between the carbon ring and the insertion protrusion 2021 or the slot 301 can be conventional, which will not be repeated here.

[0090] Here, it should be mentioned that, in addition to setting both the insertion protrusion 2021 and the slot 301 to be conical, it is also theoretically feasible to set both of them to be cylindrical. However, in this case, the power transmission path can only be disconnected when the insertion protrusion 2021 is completely out of the slot 301, so the transmission control mechanism will occupy a larger axial space. In addition, in addition to the above-mentioned structure of the insertion protrusion 2021 and the slot 301, the power engagement structure of this embodiment can also adopt the form of a plug column provided on the piston 202 and a socket provided on the transmission gear 3. At this time, when the piston 202 is pushed by the oil to slide toward the transmission member, the plug column can be inserted into the socket to drive the transmission gear 3 and the piston 202 to rotate synchronously, thereby forming a power transmission path.

[0091] Combination Fig.12 and Fig.16 As shown in , as a preferred embodiment, the elastic member of this embodiment includes a wave spring 203 arranged between the cylinder 201 and the piston 202. Fig.12 and Fig.16 As shown in FIG. 1 , the corrugated spring 203 is generally in an “S” shape and includes two connected curved portions. Furthermore, in order to further improve the elastic performance of the corrugated spring 203 , a bending groove is formed on each curved portion.

[0092] Compared with the traditional cylindrical helical spring, the wavy spring 203 can have a smaller axial dimension while providing a considerable elastic force, which can reduce the requirement for the axial length of the cylinder 201, help maintain the compactness of the entire transmission control mechanism, and make it easier to integrate into various complex transmission systems. Moreover, when using a traditional cylindrical helical spring, because of its larger axial dimension, in order to ensure the stability of the elastic force applied by the cylindrical helical spring, it is necessary to further set a guide structure between the cylinder 201 and the piston 202, which will obviously increase the complexity of the structure and the processing cost.

[0093] In addition, the wave spring 203 can also present nonlinear elastic force characteristics. In the initial compression stage, as the compression amount increases, the elastic force generated by it increases relatively slowly; and when the compression amount reaches a certain level, the elastic force will increase rapidly as the compression amount increases. Therefore, in the process of power engagement, when the piston 202 is pushed by the oil to slide toward the transmission member at the beginning, the slow elastic force growth of the wave spring 203 can allow the piston 202 to move relatively smoothly, avoiding the power engagement being too sudden due to excessive elastic force, and achieving a relatively gentle power engagement start stage. When the piston 202 is close to the fully engaged position, the rapid increase of the elastic force can ensure that the power engagement structure is tightly engaged, providing sufficient holding force to maintain the stability of power transmission.

[0094] Obviously, in addition to the wave-shaped spring 203, it is also feasible to use a conventional cylindrical helical spring as the elastic member.

[0095] In this embodiment, in order to further improve the use effect, the wave spring 203 is arranged in multiple intervals along the circumference of the first shaft 101, and is preferably evenly distributed, for example, four are evenly distributed. With this design, when the piston 202 moves in the cylinder 201, the multiple circumferentially evenly distributed wave springs 203 can provide a uniform elastic force for the piston 202, which is conducive to a more stable movement trajectory of the piston 202 in the cylinder 201, and will not deflect due to excessive or insufficient elastic force in a certain direction.

[0096] Therefore, during the power engagement process, when the piston 202 slides toward the transmission member, the plurality of wave springs 203 are evenly compressed, and the elastic force generated by them can keep the piston 202 at the center position, which is conducive to ensuring that the insertion protrusion 2021 is accurately inserted into the slot 301 of the transmission member. In addition, the evenly distributed plurality of wave springs 203 can also prevent the piston 202 from being damaged due to excessive local force, play a role in balancing the load, and improve the service life and working reliability of the piston 202.

[0097] At this time, in order to facilitate the setting of the corrugated spring 203, as shown in FIG. Fig.13 and Fig.14 As shown in , a fixing hole 2011 is provided at one end of the cylinder body 201, and a mounting hole 2022 is provided on the piston 202. The two ends of the wave spring 203 are respectively fixed in the fixing hole 2011 and the mounting hole 2022 at the corresponding ends by bolts. Fig.12 and Fig.16 In the embodiment, based on the shape of the corrugated spring 203, in order to ensure that the plurality of corrugated springs 203 are arranged in the same direction, a positioning hole 2031 is further provided at one end of the corrugated spring 203. Fig.12 As shown in FIG. 2 , a positioning protrusion 2012 inserted into the positioning hole 2031 is provided on the cylinder body 201 .

[0098] In addition, if Fig.13 As shown in , a plurality of process holes 2013 are also provided on the cylinder body 201. At this time, in order to ensure the sealing effect of the cylinder body 201, as shown in Figure 4 As shown in , the cylinder body 201 is also provided with a bowl-shaped plug for blocking the process hole 2013. Fig.15As shown in , the piston 202 is provided with a plurality of weight-reducing grooves 2023 evenly distributed along the circumference of the insertion protrusion 2021. In this embodiment, by providing a plurality of evenly distributed damping grooves, not only the weight of the piston 202 can be reduced, but also the inertial resistance when the piston 202 slides toward the transmission member under the push of the oil can be reduced, so that the sliding action can be completed more smoothly. Moreover, the evenly distributed weight-reducing grooves 2023 make the force of the piston 202 more uniform during the sliding process, which helps to ensure that the insertion protrusion 2021 can be accurately and smoothly inserted into the slot 301 of the transmission member, so as to achieve more reliable power engagement.

[0099] Based on the above overall description, the transmission control mechanism of this embodiment adopts the above structure. When the oil enters the cylinder body 201 of the piston cylinder 2, it will push the piston 202, causing the piston 202 to slide along the cylinder body 201 toward the transmission member. In this process, the oil pressure is the driving force for the piston 202 to slide, pushing the piston 202 to overcome a certain resistance (such as the elastic force of the wave spring 203, etc.) and move toward the transmission gear 3.

[0100] When the piston 202 is pushed by the oil to slide toward the transmission member, the wave spring 203 between the piston 202 and the cylinder 201 will be compressed, thereby storing energy. When the oil is depressurized and refluxed in the engine direct drive mode, the wave spring 203 releases energy, and the released energy drives the piston 202 back to its initial position, thereby releasing the engagement state of the previously formed power engagement structure.

[0101] In addition, this embodiment also provides a vehicle, wherein the power system of the vehicle is provided with the transmission control mechanism as described above.

[0102] The vehicle of this embodiment, by providing the transmission control mechanism as described above, can not only disconnect the power transmission between the power transmission shaft 1 and the transmission shaft, but also effectively reduce the impact noise between components compared to the purely mechanical control method. At the same time, the wave spring 203 can also play a buffering role, which can extend the service life of the transmission components and reduce the maintenance cost of the vehicle.

[0103] The above-mentioned embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person skilled in the art, several modifications, improvements and substitutions can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A transmission control mechanism, characterized in that: It comprises a piston cylinder (2) and a transmission member which are sequentially sleeved on the power transmission shaft (1) along the axial direction of the power transmission shaft (1); The piston cylinder (2) comprises a cylinder body (201), a piston (202) slidably arranged in the cylinder body (201), and an elastic member arranged between the piston (202) and the cylinder body (201); the piston (202) can rotate synchronously with the power transmission shaft (1), and a power engagement structure is arranged between the piston (202) and the transmission member; When the piston (202) is pushed by the oil entering the cylinder (201) to slide toward the transmission member, the elastic member stores energy, and the power engagement structure enables the piston (202) to engage with the transmission member to form a power transmission path; when the oil flows out of the cylinder (201), the elastic member releases energy to drive the piston (202) back to its original position, thereby releasing the engagement of the power engagement structure.

2. The transmission control mechanism according to claim 1, characterized in that: An oil circuit is provided on the power transmission shaft (1), and the cylinder body (201) is connected to an oil passage on a transmission housing through the oil circuit.

3. The transmission control mechanism according to claim 2, characterized in that: At least part of the oil circuit extends along the axial direction of the power transmission shaft (1), and is connected to the oil passage through an oil guide structure (5) located at one end of the power transmission shaft (1); The oil guide structure (5) comprises a connecting pipe (502) inserted into the oil circuit, and a connecting plate (501) connected to the connecting pipe (502), wherein the connecting plate (501) and the transmission housing are surrounded to form an oil storage cavity which is communicated with the oil passage.

4. The transmission control mechanism according to claim 2, characterized in that: The power transmission shaft (1) comprises a first shaft body (101) and a second shaft body (102) one end of which is inserted into the first shaft body (101), and the first shaft body (101) and the second shaft body (102) are capable of relative rotation; The piston cylinder (2) is arranged on the first shaft body (101), the transmission member is arranged on the second shaft body (102), and the oil circuit includes a main part (M) arranged on the second shaft body (102), and an annular part arranged between the first shaft body (101) and the second shaft body (102), the main part (M) extends along the axial direction of the second shaft body (102), and the annular part is connected to the cylinder body (201) through a connecting hole (1011) arranged on the first shaft body (101).

5. The transmission control mechanism according to claim 4, characterized in that: The piston (202) and the first shaft (101) are connected together via a spline connection structure (K); and / or, The transmission member comprises a transmission gear (3) arranged on the second shaft (102).

6. The transmission control mechanism according to claim 1, characterized in that: The elastic member comprises a wave spring (203) arranged between the cylinder body (201) and the piston (202).

7. The transmission control mechanism according to any one of claims 1 to 6, characterized in that: The power engagement structure comprises an insertion protrusion (2021) provided on the piston (202), and a slot (301) provided on the transmission member; When the piston (202) slides toward the transmission member, the insertion protrusion (2021) is inserted into the slot (301) and can abut against the transmission member, and a power transmission path is formed through the friction force between the two.

8. The transmission control mechanism according to claim 7, characterized in that: The insertion protrusion (2021) is in a conical structure with a cross-section gradually decreasing in the direction pointing to the transmission member.

9. The transmission control mechanism according to claim 7, characterized in that: A carbon ring is provided on the insertion protrusion (2021) and / or in the slot (301), and the insertion protrusion (2021) abuts against the transmission member via the carbon ring.

10. A vehicle, characterized in that: The vehicle power system is provided with a transmission control mechanism as claimed in any one of claims 1 to 9.

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