Power transmission mechanism and hybrid power device

Abstract

The utility model provides a kind of power transmission mechanism and hybrid power device, belong to power transmission system, power transmission mechanism includes input shaft, synchronous piece and planetary gear train being located on input shaft, coaxially arranged with input shaft, and be connected with planetary gear train output shaft, and push-pull piece being located on output shaft.Synchronous piece is located between planetary gear train and output shaft, and synchronous piece rotates synchronously with input shaft, and can slide along the axial direction of input shaft.And push-pull piece is connected with synchronous piece, and can relatively rotate, and push-pull piece is driven by external force and can drive synchronous piece to slide, to make synchronous piece and planetary gear train or output shaft engage together.The utility model described power transmission mechanism, power transmission mode can be flexibly switched.And input shaft, output shaft is coaxially arranged, and synchronous piece, planetary gear train, push-pull piece and other components are arranged in input shaft and output shaft, can effectively reduce transverse space occupation, with higher integration, facilitate arrangement implementation.

Description

Technical Field

[0001] This utility model relates to the field of power system technology, and in particular to a power transmission mechanism. It also relates to a hybrid power device equipped with the power transmission mechanism. Background Technology

[0002] Existing vehicle architectures, especially hybrid vehicles, mostly adopt a split transfer case structure. This structure consists of numerous components with a dispersed layout, resulting in a complex overall structure. It occupies a large amount of space within the vehicle's limited space, which greatly restricts the optimization of the layout of other vehicle components and the flexibility of the overall vehicle design.

[0003] Meanwhile, traditional automobiles generally use shift forks and synchronizer rings to achieve gear shifting. This structure, due to its relatively large size, exacerbates space constraints, significantly increasing the difficulty of rationally arranging it within a compact space. This makes it difficult to meet the development demands of modern automobiles for lightweight, miniaturized, and integrated design. Furthermore, the complex structure not only increases the difficulty and cost of manufacturing but also raises the complexity and failure rate of subsequent maintenance. Utility Model Content

[0004] In view of this, the present invention aims to provide a power transmission mechanism that occupies less space and is easy to arrange.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A power transmission mechanism includes an input shaft, a synchronizing element and a planetary gear system disposed on the input shaft, an output shaft coaxially disposed with the input shaft and connected to the planetary gear system, and a push-pull element slidably disposed on the output shaft;

[0007] The synchronizing element is located between the planetary gear train and the output shaft, and the synchronizing element rotates synchronously with the input shaft and can slide along the axial direction of the input shaft;

[0008] The push-pull member is connected to the synchronizing member and can rotate relative to it. The push-pull member can be driven by an external force to make the synchronizing member slide so that the synchronizing member engages with the planetary gear system or the output shaft.

[0009] Furthermore, the ring gear of the planetary gear system is fixedly installed, and the sun gear of the planetary gear system is loosely fitted on the input shaft;

[0010] The planet carrier of the planetary gear system is connected to the output shaft.

[0011] Furthermore, the sun gear has a connecting ring that protrudes outward along its own axis, and the connecting ring is provided with a plurality of first connecting teeth arranged circumferentially therein.

[0012] The synchronizing element has synchronizing teeth, which are driven to slide into the engagement ring and engage with the first engagement tooth.

[0013] Furthermore, the output shaft includes a first portion sleeved outside the input shaft, and a second portion that protrudes radially outward along the first portion;

[0014] The push-pull component is sleeved on the first part, the second part is connected to the planetary carrier, and a plurality of second engagement teeth are provided on the inner side of the second part. The synchronizing component is driven to allow the synchronizing teeth to slide into the second part and engage with the second engagement teeth.

[0015] Furthermore, the synchronizing element includes a connecting cylinder and a connecting sleeve that protrudes radially outward along the connecting cylinder;

[0016] The synchronizing gear is disposed on the engagement sleeve, at least a portion of the connecting cylinder is located within the first portion, and the connecting cylinder is connected to the input shaft via a spline.

[0017] Furthermore, the push-pull component includes a push-pull ring sleeved on the first part, a connecting ring snapped on the synchronizing component, and a push-pull arm passing through the second part;

[0018] The two ends of the push-pull arm are respectively connected to the push-pull ring and the connecting ring.

[0019] Furthermore, the coupling sleeve has a connecting groove arranged along its own circumference, and the connecting ring is located in the connecting groove;

[0020] A first retaining ring is provided in the connecting groove, and the first retaining ring abuts against the connecting ring to prevent the connecting ring from coming out of the connecting groove.

[0021] Furthermore, one end of the push-pull arm connected to the push-pull ring is provided with a spaced-apart limiting platform and a first slot, one end of the push-pull ring abuts against the limiting platform, and the other end abuts against a second retaining spring that is engaged in the first slot; and / or,

[0022] The push-pull arms are a plurality of arms spaced apart circumferentially along the push-pull ring.

[0023] Furthermore, the planetary carrier has a mounting ring protruding toward the output shaft side, one end of the mounting ring is provided with a groove, and an internal spline and a second slot located in the groove;

[0024] The output shaft is provided with an external spline, which cooperates with the internal spline, and a third retaining spring is provided in the second retaining groove to restrict the external spline from disengaging.

[0025] Compared with the prior art, this utility model has the following advantages:

[0026] (1) The power transmission mechanism described in this utility model allows for flexible switching of power transmission modes by enabling the synchronizing element to slide along the input shaft axially and engage with the planetary gear system or output shaft, thus meeting diverse application scenarios. Furthermore, by coaxially arranging the input and output shafts and placing components such as the synchronizing element, planetary gear system, and push-pull element on the input and output shafts, compared to split or structurally dispersed transmission mechanisms, this mechanism effectively reduces lateral space occupation, resulting in a higher degree of integration within a limited space and facilitating implementation.

[0027] (2) The ring gear of the planetary gear system is fixedly installed, the sun gear is loosely fitted on the input shaft, and the planet carrier is connected to the output shaft. Thus, when the synchronizing element engages with the sun gear, the power is reduced in speed by the planetary gear system and then output by the planet carrier, achieving the effect of speed reduction and torque increase. Moreover, directly connecting the planet carrier to the output shaft can effectively ensure the synchronicity and stability of power transmission. Furthermore, the input shaft and output shaft are coaxially arranged, and the planetary gear system is radially distributed around the axis, eliminating the need for an additional transfer case or complex transmission chain, effectively reducing the axial space occupied, and further facilitating the layout and implementation.

[0028] (3) By setting an outwardly protruding engagement ring on the sun gear and providing a first engagement tooth to cooperate with the synchronizing teeth of the synchronizing element, the stability and reliability of power transmission from the input shaft to the sun gear can be effectively guaranteed; moreover, this structure makes the engagement and disengagement of the synchronizing element and the sun gear more convenient and smooth. At the same time, the engagement ring protrudes outward along the sun gear axis, which can make full use of the space around the sun gear, making the structure of the entire power transmission mechanism more compact.

[0029] (4) By making the output shaft include a first part and a second part, and providing a second engagement tooth on the second part for engaging with the synchronizing tooth, it is convenient to realize the engagement and disengagement between the output shaft and the synchronizing element. Furthermore, by sleeve the first part of the output shaft outside the input shaft, the axial space occupied can be further reduced.

[0030] (5) By including a connecting cylinder and a coupling sleeve in the synchronizing element, and connecting the connecting cylinder to the input shaft via a spline, the synchronizing element and the input shaft can rotate rigidly synchronously, which can improve power transmission efficiency and enhance power response speed. Furthermore, placing a portion of the connecting cylinder within the first part can further reduce axial space occupation and improve integration. Additionally, making the coupling sleeve protrude radially outward along the connecting cylinder can increase the distribution radius of the synchronizing teeth, enabling them to withstand greater torque loads, reducing wear, and extending the service life of the synchronizing element and the coupling teeth.

[0031] (6) The push-pull component includes a push-pull ring sleeved on the first part, a connecting ring locked on the synchronizing element, and a push-pull arm passing through the second part and connecting the two. The structure is simple and easy to design and implement. Moreover, when the input shaft rotates at high speed, the push-pull component can independently perform axial shifting without waiting for the speed to drop, which can improve shifting efficiency. At the same time, the push-pull ring and the connecting ring are arranged along the axial direction of the input shaft, which can form a coaxial multi-layer nested structure with a small overall radial dimension. Compared with the traditional shifting structure, it can have better space utilization.

[0032] (7) By setting a connecting groove on the coupling sleeve and a first snap ring that abuts against the connecting ring, the connecting ring can be effectively restricted from coming out of the connecting groove, which can effectively prevent the synchronization component from separating from the push-pull component and improve the operational reliability and stability of the entire transmission mechanism. Moreover, the use of snap ring structure for axial limiting is simpler in structure than traditional bolt connection, welding and other methods, and is easier to disassemble and assemble during later maintenance.

[0033] (8) By setting a limiting platform and a first slot at the end where the push-pull arm connects to the push-pull ring, and making the push-pull ring abut between the limiting platform and the second retaining spring, the connection structure between the push-pull arm and the push-pull ring is simplified, making it easy to manufacture and facilitate subsequent maintenance and disassembly. By setting multiple push-pull arms, the shifting force can be applied more evenly to the synchronizing parts, avoiding skewing or jamming of the synchronizing parts caused by unilateral force.

[0034] (9) By setting an internal spline in the groove of the mounting ring of the planetary carrier and an external spline on the output shaft, the two can distribute the torque load, improve the load-bearing capacity, and have a better dynamic response speed through tooth meshing. Moreover, the groove of the mounting ring provides guidance for the second part of the output shaft, which is conducive to improving assembly efficiency, and the setting of the third snap ring facilitates disassembly and assembly during later maintenance.

[0035] Another objective of this invention is to provide a hybrid power device, comprising an engine, an electric motor, and a power transmission mechanism as described above, wherein the engine is connected to the input shaft and the electric motor is connected to the planetary gear system.

[0036] The hybrid power device described in this utility model, by setting the power transmission mechanism as described above, can effectively reduce space occupation and facilitate layout and implementation. Attached Figure Description

[0037] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0038] Figure 1 This is a schematic diagram of the power transmission mechanism described in an embodiment of the present utility model;

[0039] Figure 2 for Figure 1 Enlarged view of section A;

[0040] Figure 3 This is an assembly diagram of the synchronizing component, push-pull component, and output shaft described in the embodiments of this utility model;

[0041] Figure 4 This is an assembly view of the synchronizing component, push-pull component, and output shaft described in an embodiment of this utility model from another perspective;

[0042] Figure 5 This is an assembly view of the synchronizing component, push-pull component, and output shaft described in an embodiment of the present utility model from another perspective.

[0043] Figure 6 for Figure 5 Sectional view of the middle BB line;

[0044] Figure 7 This is a schematic diagram of the output shaft structure according to an embodiment of the present invention;

[0045] Figure 8 This is a schematic diagram of the output shaft described in an embodiment of the present invention from another perspective;

[0046] Figure 9 This is a schematic diagram of the structure of the synchronization component described in an embodiment of the present utility model;

[0047] Figure 10 This is a schematic diagram of the push-pull component described in an embodiment of the present utility model;

[0048] Figure 11 This is an assembly state diagram of the push-pull component and the synchronization component described in an embodiment of this utility model;

[0049] Figure 12 This is a schematic diagram of the push-pull arm and connecting ring described in an embodiment of the present invention.

[0050] Explanation of reference numerals in the attached figures:

[0051] 1. Input shaft; 2. Planetary gear train; 3. Output shaft; 4. Synchronizer; 5. Push-pull mechanism; 6. Second snap ring; 7. First snap ring; 8. Third snap ring; 9. Engine; 10. Gearbox; 11. Motor; 12. Shift fork;

[0052] 201, Sun Gear; 2011, Engaging Ring; 20111, First Engaging Tooth;

[0053] 202. Planetary gear; 203. Gear ring;

[0054] 204, Planetary Carrier; 2041, Mounting Ring; 20411, Internal Spline;

[0055] 301, First part; 302, Second part; 3021, Second engagement tooth; 3022, External spline; 3023, Through hole;

[0056] 401. Connecting cylinder; 402. Engaging sleeve; 4021. Synchronizing gear; 4022. Connecting groove;

[0057] 501, Push-pull ring; 502, Push-pull arm; 5021, Limiting platform; 5022, First slot; 503, Connecting ring. Detailed Implementation

[0058] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0059] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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 this utility model. Furthermore, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0060] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0061] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0062] Example 1

[0063] Given that existing hybrid vehicle transmission mechanisms generally employ a shift fork and synchronizer ring for gear shifting, this structure is relatively large and occupies a significant amount of space, making it difficult to arrange efficiently in a compact environment. Therefore, this embodiment proposes a novel power transmission mechanism, which, in its overall structure, includes an input shaft 1, a synchronizer 4 mounted on the input shaft 1, a planetary gear train 2, an output shaft 3 coaxially mounted with the input shaft 1 and connected to the planetary gear train 2, and a push-pull member 5 slidably mounted on the output shaft 3.

[0064] The synchronizing element 4 is located between the planetary gear train 2 and the output shaft 3, and rotates synchronously with the input shaft 1 and can slide along the axial direction of the input shaft 1. The push-pull element 5 is connected to the synchronizing element 4 and can rotate relative to it. The push-pull element 5 can be driven by an external force to make the synchronizing element 4 slide, so that the synchronizing element 4 can engage with the planetary gear train 2 or the output shaft 3.

[0065] The power transmission mechanism of this embodiment allows for flexible switching of power transmission modes by enabling the synchronizer 4 to slide axially along the input shaft 1 and engage with the planetary gear train 2 or the output shaft 3, thus meeting diverse application scenarios. Furthermore, by coaxially arranging the input shaft 1 and output shaft 3, and placing components such as the synchronizer 4, planetary gear train 2, and push-pull member 5 on the input shaft 1 and output shaft 3, this mechanism effectively reduces lateral space occupation compared to split or structurally dispersed transmission mechanisms. This results in a high degree of integration of the power transmission mechanism within a limited space, facilitating its layout and implementation.

[0066] Based on the above overview, an exemplary structure of the power transmission mechanism in this embodiment is described below. Figure 1 and Figure 2 As shown, the planetary gear system 2 is a structure commonly used by those skilled in the art, and it is the same as the prior art. It mainly consists of four core components: a sun gear 201, planet gears 202, an external gear ring 203, and a planet carrier 204. The structure of each component can also refer to the prior art, and will not be described in detail here. In this embodiment, as a preferred implementation, such as... Figure 2 As shown, the ring gear 203 of the planetary gear system 2 is fixedly installed, the sun gear 201 of the planetary gear system 2 is loosely fitted on the input shaft 1, and the planet carrier 204 of the planetary gear system 2 is connected to the output shaft 3.

[0067] Therefore, when the synchronizing element 4 engages with the sun gear 201, the power is reduced in speed by the planetary gear train 2 and then output by the planet carrier 204, achieving the effect of speed reduction and torque increase. Moreover, directly connecting the planet carrier 204 to the output shaft 3 effectively ensures the synchronicity and stability of power transmission. Furthermore, with the input shaft 1 and output shaft 3 coaxially arranged and the planetary gear train 2 radially distributed around the axis, no additional transfer case or complex transmission chain is required, effectively reducing the axial space occupied and further facilitating the layout and implementation.

[0068] Specifically, the gear ring 203 can be connected to the housing of the device supporting this power transmission mechanism to achieve a fixed setting of the gear ring 203. With this configuration, when the power source drives the sun gear 201 to rotate, the sun gear 201 will drive the planet gears 202 meshing with it to rotate. Since the other side of the planet gears 202 meshes with the internal gear ring 203, while rotating, the planet gears 202 will revolve around the sun gear along the trajectory of the internal gear ring 203 under the reaction force of the internal gear ring 203. The rotation and revolution of the planet gears 202 will cause the planet carrier 204 to rotate accordingly, and the output shaft 3 connected to the planet carrier 204 will output power.

[0069] like Figure 2 As shown in the diagram, in a further embodiment, the sun gear 201 has an engagement ring 2011 protruding outward along its own axial direction, and the engagement ring 2011 has a plurality of first engagement teeth 20111 arranged circumferentially therein. Furthermore, the synchronizing member 4 has synchronizing teeth 4021, which, when driven, allow the synchronizing member 4 to slide into the engagement ring 2011 and engage with the first engagement teeth 20111. This design ensures a tight meshing between the synchronizing teeth 4021 and the first engagement teeth 20111, forming a rigid connection, which helps ensure the stability and reliability of power transmission from the input shaft 1 to the sun gear 201. Simultaneously, this structure makes the engagement and disengagement of the synchronizing member 4 and the sun gear 201 more convenient and smooth.

[0070] Furthermore, the engaging ring 2011 protrudes outward along the axial direction of the sun gear 201, making full use of the space around the sun gear 201 without increasing the radial or axial dimensions of the transmission mechanism. This results in a more compact structure for the entire power transmission mechanism, improving its integration and facilitating the overall arrangement of the mechanism. Additionally, as a further embodiment, such as... Figure 2 As shown, the coupling ring 2011 extends radially along the sun gear 201 and includes a connected annular body and an end plate located at one end of the annular body. The coupling ring 2011 is specifically connected to the sun gear 201 through the end plate.

[0071] Furthermore, for ease of manufacturing, in specific implementation, a connecting ring 2011 extending axially can be welded onto the existing conventional sun gear structure, and multiple first engaging teeth 20111 arranged circumferentially along the inner side of the connecting ring 2011 can be provided, thus forming the sun gear 201 with the connecting ring 2011 in this embodiment, which facilitates improved implementation. Moreover, multiple first engaging teeth 20111 are evenly distributed circumferentially along the connecting ring 2011, so as to better engage with the synchronizing teeth 4021 and improve the uniformity of power transmission.

[0072] Additionally, see Figure 2 As shown, in a preferred embodiment, a receiving space is formed between the output shaft 3 and the input shaft 1, surrounding the input shaft 1, to facilitate the installation of the synchronizing element 4 on the input shaft 1, further reducing the space occupied by the overall power transmission mechanism and achieving a higher degree of integration. Here, as a preferred embodiment, combining 3 to... Figure 8 As shown, the output shaft 3 includes a first portion 301 sleeved outside the input shaft 1, and a second portion 302 that protrudes radially outward along the first portion 301.

[0073] The push-pull member 5 is fitted onto the first part 301, and the second part 302 is connected to the planetary carrier 204. Multiple second engagement teeth 3021 are provided inside the second part 302. The synchronizing member 4 is driven to allow the synchronizing teeth 4021 to slide into the second part 302 and engage with the second engagement teeth 3021. Furthermore, the push-pull member 5 is pushed by the shift fork 12 of the shifting mechanism, allowing it to slide axially along the output shaft 3, and the multiple second engagement teeth 3021 are evenly distributed circumferentially along the second part 302. This arrangement facilitates the engagement and disengagement of the output shaft 3 and the synchronizing member 4. Furthermore, fitting the first part 301 of the output shaft 3 onto the outside of the input shaft 1 further reduces the axial space occupied.

[0074] Furthermore, as a preferred embodiment, to further facilitate the transmission of power from the output shaft 3 to the outside, the end of the first part 301 away from the second part 302 is provided with a connecting portion that protrudes outward along its axial direction, and the diameter of the connecting portion is smaller than the diameter of the first part 301. This design can further compress the radial space and facilitate connection with other components.

[0075] The synchronizing element 4 in this embodiment includes a connecting cylinder 401 and a connecting sleeve 402 that protrudes radially outward along the connecting cylinder 401. The synchronizing teeth 4021 are disposed on the connecting sleeve 402. At least a portion of the connecting cylinder 401 is located within the first portion 301, and the connecting cylinder 401 is connected to the input shaft 1 via a spline. Here, the connection of the connecting cylinder 401 to the input shaft 1 via a spline enables the synchronizing element 4 to form a rigid synchronous rotational relationship with the input shaft 1, which facilitates the transmission of power from the input shaft 1 to the synchronizing element 4 without delay, thereby improving the power response speed.

[0076] Furthermore, the guiding effect of the spline effectively prevents radial offset or jamming of the synchronizing element 4 during sliding, improving the smoothness and reliability of gear shifting. Additionally, the engagement sleeve 402 protrudes radially outward along the connecting cylinder 401, increasing the distribution radius of the synchronizing teeth 4021, allowing it to withstand greater torque loads, reducing wear, and extending the service life of the synchronizing element 4 and the engagement teeth. Simultaneously, a portion of the connecting cylinder 401 is located within the first part 301 of the output shaft 3, reducing the space occupied.

[0077] See Figure 9 As shown, in a preferred embodiment, the synchronizing teeth 4021 are a plurality of teeth evenly distributed along the circumference of the engagement sleeve 402. Furthermore, as... Figure 2 As shown, the coupling sleeve 402 and part of the connecting cylinder 401 are located inside the output shaft 3, so as to further reduce the radial space occupied, improve the compactness of the overall structure, and facilitate the arrangement.

[0078] It should be noted that the same set of synchronizing gears 4021 can be used to engage with both the sun gear 201 and the output shaft 3, which can further reduce the space occupied by the synchronizing element 4, thereby making the space occupied by this power transmission mechanism smaller and easier to arrange.

[0079] Furthermore, as a preferred embodiment, see [link to previous document]. Figure 5 , Figure 6 and Figure 10 As shown, the push-pull component 5 includes a push-pull ring 501 sleeved on the first part 301, a connecting ring 503 locked on the synchronizing component 4, and a push-pull arm 502 passing through the second part 302, with both ends of the push-pull arm 502 connected to the push-pull ring 501 and the connecting ring 503, respectively. This structure is simple and easy to design and implement.

[0080] Furthermore, when the input shaft 1 rotates at high speed, the push-pull component 5 can independently perform axial shifting without waiting for the speed to decrease, thus improving shifting efficiency. At the same time, the push-pull ring 501 and the connecting ring 503 are both arranged along the axial direction of the input shaft 1, forming a coaxial multi-layer nested structure with a smaller overall radial dimension, which provides better space utilization compared to traditional shifting structures.

[0081] Specifically, such as Figure 11 and Figure 12 As shown, the push-pull ring 501 has a push-pull groove arranged along its axial direction. The shift fork 12 of the shift mechanism is located in the push-pull groove. Thus, the shift fork 12 can push against the groove wall to drive the synchronizing member 4 to move left and right along the axial direction of the input shaft 1, so as to engage with the sun gear 201 or the output shaft 3 through the synchronizing gear 4021, thereby realizing gear shifting. In addition, as a preferred embodiment, there are multiple push-pull arms 502 evenly distributed along the circumference of the push-pull ring 501, so that the shifting driving force is evenly applied to the synchronizing member 4, avoiding the skewing or jamming of the synchronizing member 4 caused by unilateral force.

[0082] In one specific embodiment, four push-pull arms 502 are evenly distributed along the circumference of the push-pull ring 501. Correspondingly, four through holes 3023 are provided on the second part 302 of the output shaft 3 for the four push-pull arms 502 to pass through. It can be understood that, in addition to the four push-pull arms shown in the figure, there can also be two, five or other numbers of push-pull arms 502.

[0083] At this time, in order to facilitate the connection between the push-pull component 5 and the synchronizing component 4, and to enable relative rotation, as a preferred embodiment, such as... Figure 6 and Figure 9 As shown, the coupling sleeve 402 has a connecting groove 4022 arranged along its circumference, and the connecting ring 503 is located in the connecting groove 4022. Furthermore, a first retaining spring 7 is provided in the connecting groove 4022, and the first retaining spring 7 abuts against the connecting ring 503 to prevent the connecting ring 503 from dislodging from the connecting groove 4022.

[0084] In this embodiment, the first retaining ring 7 abuts against the connecting ring 503, forming a reliable axial constraint that effectively prevents the connecting ring 503 from dislodging from the connecting groove 4022, ensuring that the synchronizing member 4 and the push-pull member 5 remain connected at all times. Furthermore, the connecting ring 503 is located within the connecting groove 4022, and the synchronizing member 4 and the push-pull member 5 can rotate relative to each other. This allows the push-pull member 5 to drive the synchronizing member 4 to slide axially during power transmission, enabling switching between different power transmission modes without hindering the synchronous rotation of the synchronizing member 4 and the input shaft 1, as well as the power transmission with other components.

[0085] Furthermore, the use of a snap ring structure for axial positioning makes the assembly process simpler and faster compared to traditional bolt connections and welding methods. Assembly is completed simply by placing the connecting ring 503 into the connecting groove 4022 and then installing the first snap ring 7, reducing assembly difficulty and labor intensity while improving production efficiency. It also facilitates later maintenance and disassembly.

[0086] Meanwhile, to facilitate the connection between the push-pull component 5, the synchronizing component 4, and the output shaft 3, in a preferred embodiment, the end of the push-pull arm 502 connected to the push-pull ring 501 is provided with a spaced-apart limiting platform 5021 and a first slot 5022. One end of the push-pull ring 501 abuts against the limiting platform 5021, and the other side abuts against the second retaining spring 6, which is secured in the first slot 5022. This structure is simple, easy to design and implement, and also convenient for later disassembly and maintenance. Furthermore, during disassembly, simply removing the second retaining spring 6 allows the push-pull component 5 and the synchronizing component 4 to be removed along the axial direction of the output shaft 3. Then, removing the first retaining spring 7 allows the push-pull component 5 and the synchronizing ring to be separated.

[0087] It should be noted that, in addition to using the second retaining ring 6 to restrict the push-pull ring 501 from disengaging from the push-pull arm 502, other conventional structures can also be used, or the two can be welded together.

[0088] In addition, as a preferred embodiment, combined with Figures 2 to 4 As shown, the planetary carrier 204 has a mounting ring 2041 protruding towards the output shaft 3. One end of the mounting ring 2041 has a groove, and an internal spline 20411 and a second retaining groove are located within the groove. Furthermore, the output shaft 3 has an external spline 3022, which engages with the internal spline 20411. A third retaining spring 8 is provided in the second retaining groove to prevent the external spline 3022 from disengaging. Specifically, the external spline 3022 is located at the end of the second portion 302 of the output shaft 3 furthest from the first portion 301.

[0089] In this embodiment, an internal spline 20411 is provided in the groove of the mounting ring 2041 of the planetary carrier 204, and an external spline 3022 is provided in the second part 302 of the output shaft 3. The two splines mesh with teeth, which can distribute the torque load, improve the load-bearing capacity, and provide better power response speed. Moreover, the groove of the mounting ring 2041 provides guidance for the second part 302 of the output shaft 3, which is conducive to improving assembly efficiency, and the third retaining ring 8 facilitates disassembly and assembly during later maintenance.

[0090] It should be noted that, in practical implementation, a mounting ring 2041 with an internal spline 20411 can be added to the existing planetary carrier structure. The structure is simple, requires few modifications, and is easy to implement. In addition, besides connecting the planetary carrier 204 and the output shaft 3 via splines, welding the two together is also theoretically feasible.

[0091] Based on the above overview, the power transmission mechanism of this embodiment, by adopting the aforementioned structure, uses the sliding of the synchronizing element 4 to achieve power path switching. Combined with the characteristics of the planetary gear system 2, it can meet various working conditions. Simultaneously, the spline connection facilitates synchronous rotation and axial sliding, ensuring power transmission without delay and flexible switching. Furthermore, the coaxial arrangement of the input shaft 1 and output shaft 3, compared to the traditional split structure, reduces space occupation, facilitating compact installation and transmission layout, and adapting to miniaturization requirements.

[0092] Example 2

[0093] This embodiment relates to a hybrid power device, including an engine 9, an electric motor 11, and a power transmission mechanism as in Embodiment 1, wherein the engine 9 is connected to the input shaft 1 and the electric motor 11 is connected to the planetary gear system 2.

[0094] Still refer to Figure 1 and Figure 2 As shown in the diagram, in a preferred embodiment, the engine 9 is connected to the input shaft 1 via a gearbox 10 with a transmission mechanism. The gearbox 10 can employ a conventional structure and generally includes a first shaft connected to the engine 9, the aforementioned input shaft 1 for power output, a transmission gear set, and an intermediate shaft. This embodiment does not modify this structure and therefore will not be described further. Furthermore, the motor shaft of the motor 11 is specifically connected to the sun gear 201 of the planetary gear system 2, and the motor shaft of the motor 11 is loosely fitted onto the aforementioned input shaft 1. The gear ring 203 is specifically connected to the housing of the hybrid power unit.

[0095] Therefore, based on Figure 1 As shown in the diagram, the hybrid power unit in this embodiment can achieve three output modes: hybrid first gear, hybrid second gear, and pure electric gear.

[0096] Furthermore, in hybrid first gear mode, the ring gear 203 is locked, the synchronizer 4 engages with the sun gear 201 on the left, and the power from the engine 9 is transmitted to the sun gear 201 via the gearbox 10 through the input shaft 1 and the synchronizer 4. At the same time, the electric motor 11 transmits power to the sun gear 201, and then outputs power through the planetary carrier 204 and the output shaft 3.

[0097] In hybrid second-gear mode, the ring gear 203 is locked, the synchronizer 4 engages with the output shaft 3 on the right, and the power of the engine 9 is transmitted to the output shaft 3 via the gearbox 10 through the input shaft 1 and the synchronizer 4. At the same time, the motor 11 transmits power to the sun gear 201, and then through the planetary carrier 204, the power is output from the output shaft 3.

[0098] In pure electric drive mode, the gear ring 203 is locked, the synchronizing element 4 is in the middle position and is not engaged with the sun gear 201 and the output shaft 3. At this time, the motor 11 transmits power to the sun gear 201, and then through the planet carrier 204, the power is output by the output shaft 3.

[0099] Therefore, the hybrid power unit in this embodiment, by setting up a power transmission mechanism as in Embodiment 1, can effectively reduce space occupation and facilitate layout and implementation. Furthermore, based on the 10-speed gearbox, it can further have more driving modes, adapting to the needs of various operating conditions and thus achieving better performance.

[0100] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A power transmission mechanism, characterized in that: It includes an input shaft (1), a synchronizing element (4) and a planetary gear train (2) disposed on the input shaft (1), an output shaft (3) coaxially disposed with the input shaft (1) and connected to the planetary gear train (2), and a push-pull element (5) slidably disposed on the output shaft (3); The synchronizing element (4) is located between the planetary gear system (2) and the output shaft (3), and the synchronizing element (4) rotates synchronously with the input shaft (1) and can slide along the axial direction of the input shaft (1); The push-pull member (5) is connected to the synchronization member (4) and can rotate relative to it. The push-pull member (5) is driven by an external force to drive the synchronization member (4) to slide, so that the synchronization member (4) is engaged with the planetary gear system (2) or the output shaft (3).

2. The power transmission mechanism according to claim 1, characterized in that: The ring gear (203) of the planetary gear system (2) is fixedly installed, and the sun gear (201) of the planetary gear system (2) is loosely fitted on the input shaft (1); The planet carrier (204) of the planetary gear system (2) is connected to the output shaft (3).

3. The power transmission mechanism according to claim 2, characterized in that: The sun gear (201) has a connecting ring (2011) that protrudes outward along its own axis, and the connecting ring (2011) has a plurality of first engaging teeth (20111) arranged circumferentially therein. The synchronizing element (4) has synchronizing teeth (4021), which are driven to slide into the engagement ring (2011) and engage with the first engagement teeth (20111).

4. The power transmission mechanism according to claim 3, characterized in that: The output shaft (3) includes a first portion (301) sleeved outside the input shaft (1) and a second portion (302) that bulges outward along the first portion (301). The push-pull member (5) is sleeved on the first part (301), the second part (302) is connected to the planet carrier (204), and a plurality of second engagement teeth (3021) are provided on the inner side of the second part (302). The synchronizing member (4) is driven to allow the synchronizing teeth (4021) to slide into the second part (302) and engage with the second engagement teeth (3021).

5. The power transmission mechanism according to claim 4, characterized in that: The synchronizing element (4) includes a connecting cylinder (401) and a connecting sleeve (402) that protrudes radially outward along the connecting cylinder (401). The synchronizing gear (4021) is disposed on the engaging sleeve (402), at least part of the connecting cylinder (401) is located in the first part (301), and the connecting cylinder (401) is connected to the input shaft (1) by a spline.

6. The power transmission mechanism according to claim 5, characterized in that: The push-pull member (5) includes a push-pull ring (501) sleeved on the first part (301), a connecting ring (503) snapped on the synchronizing member (4), and a push-pull arm (502) passing through the second part (302). The two ends of the push-pull arm (502) are respectively connected to the push-pull ring (501) and the connecting ring (503).

7. The power transmission mechanism according to claim 6, characterized in that: The connecting sleeve (402) has a connecting groove (4022) arranged along its circumference, and the connecting ring (503) is located in the connecting groove (4022); The connecting groove (4022) is provided with a first retaining ring (7), which abuts against the connecting ring (503) to prevent the connecting ring (503) from coming out of the connecting groove (4022).

8. The power transmission mechanism according to claim 7, characterized in that: The push-pull arm (502) is connected to the push-pull ring (501) at one end, which is provided with a spaced-apart limiting platform (5021) and a first slot (5022). One end of the push-pull ring (501) abuts against the limiting platform (5021), and the other end abuts against a second retaining spring (6) that is locked in the first slot (5022); and / or, The push-pull arms (502) are a plurality of arms spaced apart circumferentially along the push-pull ring (501).

9. The power transmission mechanism according to any one of claims 2 to 8, characterized in that: The planetary carrier (204) has a mounting ring (2041) protruding toward the output shaft (3) side, one end of the mounting ring (2041) is provided with a groove, and an inner spline (20411) and a second slot are located in the groove; The output shaft (3) is provided with an external spline (3022), which cooperates with the internal spline (20411), and a third retaining ring (8) is provided in the second slot to restrict the external spline (3022) from coming out.

10. A hybrid power device, characterized in that: It includes an engine, an electric motor, and a power transmission mechanism as described in any one of claims 1 to 9, wherein the engine is connected to the input shaft and the electric motor is connected to the planetary gear system.

Images