Planet row transmission and vehicle

Abstract

The utility model provides a planet row transmission and a vehicle, and belongs to the technical field of automobile transmission parts, and the planet row transmission comprises a transmission main body, a driving piston, a canine tooth combination structure and a position sensing structure. According to the position sensing structure, the movable sensing part in the position sensing structure is arranged at the penetrating-out end of the sliding part, and the fixed sensing part is arranged on the transmission part, so that the position sensing structure is externally arranged, and the installation and maintenance difficulty of the position sensing structure can be reduced. The positions and the sizes of the fixed sensing part and the movable sensing part correspond to each other, so that the compact and miniaturized design scheme of the position sensing structure can be realized, and the layout influence of the position sensing structure on peripheral components is reduced. By adopting the mode that the protruding piece is matched with the inserting hole, stable movement of the sliding part can be achieved, circumferential locking between the sliding part and the transmission piece can be achieved, and the structure is simpler. The sliding part is supported between the input shaft and the transmission piece, so that the stability of the positions of the transmission piece and the input shaft is kept.

Description

Technical Field

[0001] This application belongs to the field of automotive transmission components technology, and more specifically, relates to a planetary gearbox transmission and a vehicle. Background Technology

[0002] A planetary gearbox is a transmission that uses a planetary gear mechanism to achieve speed changes. It has a sun gear at its center, surrounded by several planet gears that rotate around it. The planet gears are connected by a common planet carrier, and each planet gear has a ring gear around its outer circumference. To accommodate speed adjustments, the sun gear is mounted on the input shaft, and a clutch mechanism is typically used to connect and disconnect the sun gear from the output shaft.

[0003] The clutch mechanism located between the sun gear and the output shaft often adopts a dog-tooth clutch structure, mainly due to its advantages of simple structure and low torque loss. In a dog-tooth clutch structure, the two dog teeth between the sun gear and the output shaft are brought closer together and engaged by the drive mechanism, thus achieving engagement between the sun gear and the output shaft. The two dog teeth are then separated, thus achieving disengagement between the sun gear and the output shaft. To control the movement distance of the dog teeth and ensure effective engagement or disengagement, a position sensor needs to be installed on the transmission. Currently, installing a position sensor on a transmission is quite difficult, as the component occupies a large space and affects the overall design layout of the transmission. Utility Model Content

[0004] The purpose of this application is to provide a planetary gearbox that solves the problems of difficult placement and large space occupation of position sensors in existing planetary gearboxes, and achieves miniaturized design of position sensing structure, while reducing the difficulty of placing position sensing structure.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] In a first aspect, embodiments of this application provide a planetary gearbox, comprising:

[0007] The main body of the transmission includes an input shaft, a transmission component, and a transmission gear. The transmission component and the transmission gear are distributed along the axial direction of the input shaft, and both can rotate about the central axis of the input shaft.

[0008] A drive piston is disposed between the transmission member and the transmission gear, and has a sliding part and a pushing part. The sliding part slides through the transmission member and is circumferentially stopped with the transmission member. The pushing part is rotatably connected to the sliding part about the central axis as the axis of rotation. The sliding part can drive the pushing part to slide along the axial direction of the input shaft.

[0009] A canine tooth engagement structure is provided between the input shaft and the transmission gear, and the pushing part can switch the canine tooth engagement structure between an engaged state and a disengaged state during the sliding process;

[0010] The position sensing structure includes a moving sensing part and a fixed sensing part. The moving sensing part is connected to the through end of the sliding part, and the fixed sensing part is fixed to the transmission member and corresponds to the moving sensing part, so as to detect the moving distance of the sliding part.

[0011] Existing position sensing structures are mostly installed between the planetary carrier and the sun gear of the transmission. These structures primarily consist of two corresponding sensing units, typically mounted on two components with relative rotational speeds. Since one sensing unit rotates relative to the other, to ensure reliable detection, the rotating unit is often made relatively large. For example, one of the sensing units used for signal reflection might be a continuously distributed annular baffle extending circumferentially along the transmission, ensuring signal reflection from the other signal-transmitting unit regardless of its rotation position. This results in the position sensing device occupying a significant amount of internal space within the transmission, impacting the layout of other internal components. Furthermore, in addition to these drawbacks, the built-in design of the position sensing device requires avoiding internal transmission components during installation, and maintenance necessitates disassembling the transmission, leading to significant installation and maintenance difficulties and high maintenance costs.

[0012] Compared with the prior art, the solution shown in this application embodiment has a canine engagement structure between the input shaft and the transmission gear. In the engaged state, the canine engagement structure, the transmission gear and the input shaft rotate synchronously, and the drive piston is segmented so that the pushing part can rotate relative to the sliding part. The pushing part can connect with the canine engagement structure and rotate synchronously with the canine engagement structure, while the sliding part does not rotate with the canine engagement structure, but only slides relative to the transmission component. During the sliding process, the state of the canine engagement structure is adjusted. Based on this, since the sliding distance of the sliding part is the adjustment movement distance of the dog-tooth engagement structure, and it has an outlet end located on the other side of the transmission component, with the outlet end outside the transmission body, the moving sensor part in the position sensing structure is placed at the outlet end of the sliding part, and the fixed sensor part is placed on the transmission component, realizing the external placement of the position sensing structure, thereby reducing the difficulty of installation and maintenance of the position sensing structure; at the same time, since there is no relative rotation between the transmission component and the sliding part, the positions and dimensions between the fixed sensor part and the moving sensor part correspond to each other, without having to make one of the sensor parts too large, thus better realizing the compact and miniaturized design scheme of the position sensing structure, reducing the impact of the position sensing structure on the layout of surrounding components; in addition, since there is no relative rotation between the transmission component and the sliding part, the two always correspond in the radial direction of the input shaft, and the stability of this layout makes the position sensing more accurate.

[0013] In conjunction with the first aspect, in one possible implementation, the sliding part has a protrusion extending axially along the input shaft on the side opposite to the transmission gear, the transmission member has an insertion hole, the protrusion slides through the insertion hole, and the motion sensing part is connected to the protruding end of the protrusion.

[0014] In the above technical solution, the protrusion can meet the sliding fit between the sliding part and the transmission part, and can also better realize the setting of the through transmission part, thus providing a basis for installing the moving sensor, and the structure is simpler and more compact; the fit between the protrusion and the socket can also realize the circumferential stop of the sliding part and the transmission part, without the need to set an additional circumferential limiting structure, making the structure simpler.

[0015] In some embodiments, multiple protrusions are uniformly provided along the circumference of the sliding portion, and multiple insertion holes are uniformly provided along the circumference of the transmission member, with each protrusion corresponding to one insertion hole.

[0016] In the above technical solution, the setting of multiple protrusions effectively increases the number of fitting points between the sliding part and the transmission part. Multiple fitting points can more effectively disperse frictional force, avoiding excessive frictional force on a single protrusion that would affect the smoothness of sliding. At the same time, by dispersing the twisting force through multiple fitting points, the risk of protrusion breakage is reduced, and the reliability of use is improved.

[0017] In some embodiments, the transmission component is sleeved on the outer periphery of the input shaft, the sliding part is supported between the input shaft and the transmission component, and the outer and inner peripheral surfaces of the sliding part are respectively provided with first lubrication grooves, which can accommodate lubricating oil.

[0018] In the above technical solution, the sliding part is supported between the input shaft and the transmission component, which helps to maintain the stability of the positions of the transmission component and the input shaft. The outer and inner circumferential surfaces of the sliding part are respectively provided with first lubrication grooves. The first lubrication grooves can accommodate lubricating oil, which can form lubrication between the sliding part and the transmission component, further improving the smoothness of the sliding part's movement.

[0019] In some embodiments, the inner circumferential surface of the transmission member is provided with a sliding adapter boss, the sliding adapter boss is located on the side of the sliding part away from the transmission gear, and the insertion hole is provided on the sliding adapter boss.

[0020] In the above technical solution, the sliding adapter boss provides a sliding connection platform for the protrusion, which is convenient for fitting the protrusion. On the other hand, it can also form a support between the transmission component and the input shaft, and cooperate with the sliding part to further improve the positional stability between the transmission component and the input shaft.

[0021] In some embodiments, the sliding part has a rotating adapter boss on the side facing the transmission gear, and a rotating adapter bearing is sleeved on the outer periphery of the rotating adapter boss. The pushing part is rotatably connected to the sliding part through the rotating adapter bearing.

[0022] In the above technical solution, the rotating adapter bearing serves as a rotating connecting component between the jacking part and the sliding part, improving the smoothness of the jacking part's rotation; at the same time, by setting a rotating adapter boss, the rotating adapter bearing is supported, preventing it from falling off the sliding part and ensuring the stability of the assembly.

[0023] In conjunction with the first aspect, in one possible implementation, one of the fixed sensing unit and the movable sensing unit is a magnetic induction sensor, and the other of the fixed sensing unit and the movable sensing unit is a magnet.

[0024] Among the above technical solutions, the magnetic induction sensor has the characteristics of high measurement accuracy, long service life and fast response speed, and is suitable for working scenarios of clutch adjustment.

[0025] In conjunction with the first aspect, in one possible implementation, the canine ligament structure includes:

[0026] A first canine tooth portion is provided on the transmission gear;

[0027] The second canine tooth is slidably connected to the input shaft along the axial direction of the input shaft and is circumferentially stopped with the input shaft. The pushing part can drive the second canine tooth to move so that the second canine tooth and the first canine tooth can switch between an engaged state and a disengaged state. In the engaged state, the second canine tooth and the first canine tooth bite together.

[0028] An elastic element is disposed between the input shaft and the second canine portion, and is configured with a preload force that brings the second canine portion closer to the first canine portion.

[0029] In the above technical solution, the elastic element and the pusher cooperate to clamp the second canine tooth on both sides, which can maintain the stable operation of the second canine tooth during movement, effectively fix the position of the second canine tooth after it stops moving, and achieve automatic reset during the process of switching from the separated state to the joined state, without the need to set up a complex connection structure between the pusher and the second canine tooth.

[0030] In some embodiments, the transmission gear has a biting extension on the side facing the pusher, and the biting extension and the input shaft are spaced apart to form a receiving space; the biting extension has a first canine tooth on the side facing the receiving space, and the second canine tooth is disposed in the receiving space;

[0031] The input shaft is provided with a limiting protrusion located in the receiving space. The limiting protrusion is located on the side of the second canine portion away from the pushing portion. The elastic element is supported and connected between the limiting protrusion and the second canine portion.

[0032] In the above technical solution, by forming a receiving space, the elastic element, the first canine tooth part and the second canine tooth part are integrated into the same spatial element. The structure of the first canine tooth part and the second canine tooth part is simpler, the canine tooth joint structure is more compact as a whole, and the canine tooth joint structure can be protected by the biting extension, thereby improving the reliability of use.

[0033] Secondly, embodiments of this application also provide a vehicle including the aforementioned planetary gearbox.

[0034] Compared with the prior art, the solution shown in this application embodiment has lower installation and maintenance costs for the internal position sensing structure by adopting the above-mentioned planetary gearbox. The influence of the position sensing structure on the layout of surrounding components is effectively reduced, which not only helps to achieve a compact design of the planetary gearbox as a whole, but also reduces the design difficulty. In addition, due to the improved position sensing accuracy, the stability and reliability of the dog-tooth engagement structure are improved, thereby improving the smoothness of gear shifting. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the internal structure of the planetary gearbox provided in Embodiment 1 of this application;

[0037] Figure 2 for Figure 1 Enlarged view of part A;

[0038] Figure 3 This is an assembly perspective view of the drive piston and transmission components used in Embodiment 2 of this application;

[0039] Figure 4 The three-dimensional drive piston used in Embodiment 2 of this application Figure 1 ;

[0040] Figure 5 The three-dimensional drive piston used in Embodiment 2 of this application Figure 2 ;

[0041] Figure 6 This is a perspective view of the transmission component used in Embodiment 2 of this application;

[0042] In the diagram: 100, transmission body; 200, drive piston; 300, canine engagement structure; 400, position sensing structure; 1, input shaft; 2, transmission component; 210, sliding adapter boss; 3, transmission gear; 310, meshing extension; 320, limiting step; 4, sliding part; 401, first lubrication groove; 410, rotating adapter boss; 5, pushing part; 510, first adapter section; 520, connecting section; 530, second adapter section; 6. 7. Central axis; 8. Movable sensor; 9. Fixed sensor; 10. Protrusion; 11. Insertion hole; 12. Second lubrication groove; 13. Rotational adapter bearing; 14. First shaft ring; 15. Roller assembly; 16. Second shaft ring; 17. First canine tooth; 18. Second canine tooth; 19. Limiting groove; 10. Elastic element; 11. Accommodating space; 12. Limiting protrusion; 13. Shaft spline; 14. Canine tooth spline; 15. Snap ring. Detailed Implementation

[0043] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0044] It should be noted that when an element is referred to as being "set on" another element, it can be directly on or indirectly on that other element. It should be understood that the terms "length," "width," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application 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 application.

[0045] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a number" means two or more, unless otherwise explicitly specified.

[0046] Please refer to the following: Figures 1 to 6 The planetary gearbox provided in this application will now be described. The planetary gearbox includes a gearbox body 100, a drive piston 200, a dog-tooth engagement structure 300, and a position sensing structure 400. The gearbox body 100 includes an input shaft 1, a transmission member 2, and a transmission gear 3. The transmission member 2 and the transmission gear 3 are distributed along the axial direction of the input shaft 1, and both can rotate around the central axis 6 of the input shaft 1. The drive piston 200 is disposed between the transmission member 2 and the transmission gear 3, and has a sliding part 4 and a pushing part 5. The sliding part 4 slides through the transmission member 2 and is circumferentially stopped with respect to the transmission member 2. The pushing part 5 is positioned around the central axis. 6 is the axis of rotation, rotatably connected to the sliding part 4. The sliding part 4 can drive the pushing part 5 to slide along the axial direction of the input shaft 1. The canine engagement structure 300 is provided between the input shaft 1 and the transmission gear 3. The pushing part 5 can switch the canine engagement structure 300 between the engaged state and the disengaged state during the sliding process. The position sensing structure 400 includes a moving sensing part 7 and a fixed sensing part 8. The moving sensing part 7 is connected to the through end of the sliding part 4. The fixed sensing part 8 is fixed to the transmission member 2 and corresponds to the moving sensing part 7 to detect the moving distance of the sliding part 4.

[0047] In this embodiment, the input shaft 1 is connected to the output shaft of a power output device such as an engine or drive motor to transmit the torque of the power output device. The transmission component 2 is a planetary carrier, and the planetary gears in the planetary gearbox are connected to the planetary carrier through a rotating shaft. The transmission component 2 can serve as an output shaft to output torque. The transmission gear 3 is a sun gear, which is sleeved on the outer circumference of the input shaft 1 and can mesh with the planetary gears. The planetary gears can mesh with the outer ring gear.

[0048] More specifically, the main body 100 of the transmission includes an input shaft 1, a transmission component 2 (specifically a planetary carrier), a transmission gear 3 (specifically a sun gear), and a gear ring. The transmission gear 3 is sleeved on the outer periphery of the input shaft 1, the planetary gears surround the outer periphery of the transmission gear 3 and mesh with the transmission gear 3, the gear ring surrounds the outer periphery of the planetary gears and meshes with the planetary gears, and the planetary carrier is connected to each planetary gear.

[0049] Existing position sensing structures are mostly installed between the planetary carrier and the sun gear of the transmission. These structures primarily consist of two corresponding sensing units, typically mounted on two components with relative rotational speeds. Since one sensing unit rotates relative to the other, to ensure reliable detection, the rotating unit is often made relatively large. For example, one of the sensing units used for signal reflection might be a continuously distributed annular baffle extending circumferentially along the transmission, ensuring signal reflection from the other signal-transmitting unit regardless of its rotation position. This results in the position sensing device occupying a significant amount of internal space within the transmission, impacting the layout of other internal components. Furthermore, in addition to these drawbacks, the built-in design of the position sensing device requires avoiding internal transmission components during installation, and maintenance necessitates disassembling the transmission, leading to significant installation and maintenance difficulties and high maintenance costs.

[0050] Compared with the prior art, the planetary gearbox provided in this application has a dog-tooth engagement structure 300 between the input shaft 1 and the transmission gear 3. In the engaged state, the dog-tooth engagement structure 300, the transmission gear 3 and the input shaft 1 rotate synchronously, which divides the drive piston 200 into segments, so that the push part 5 can rotate relative to the sliding part 4. The push part 5 can connect with the dog-tooth engagement structure 300 and rotate synchronously with the dog-tooth engagement structure 300, while the sliding part 4 does not rotate with the dog-tooth engagement structure 300, but only slides relative to the transmission member 2. During the sliding process, the state of the dog-tooth engagement structure 300 is adjusted. Based on this, since the sliding distance of the sliding part 4 is the adjustment movement distance of the dog-tooth engagement structure 300, and it has an outlet end located on the other side of the transmission member 2, with the outlet end located outside the transmission body 100, the movable sensing part 7 in the position sensing structure 400 is set at the outlet end of the sliding part 4, and the fixed sensing part 8 is set on the transmission member 2, realizing the external placement of the position sensing structure 400, thereby reducing the difficulty of installation and maintenance of the position sensing structure 400; at the same time, since there is no relative rotation between the transmission member 2 and the sliding part 4, the positions and dimensions between the fixed sensing part 8 and the movable sensing part 7 correspond to each other, without having to make one of the sensing parts too large, thereby better realizing the compact and miniaturized design of the position sensing structure 400, reducing the impact of the position sensing structure 400 on the layout of surrounding components; in addition, since there is no relative rotation between the transmission member 2 and the sliding part 4, the two always correspond in the radial direction of the input shaft 1, and the stability of this layout makes the position sensing more accurate.

[0051] In some embodiments, the sliding part 4 is connected to a hydraulic control device, which is located on the side of the sliding part 4 away from the transmission gear 3. For example, an oil circuit is arranged directly on the transmission component 2, and the hydraulic oil can be directly taken from the lubricating oil inside the transmission. The protruding end of the sliding part 4 extends into the oil circuit, and the position of the sliding part 4 is adjusted by the flow of lubricating oil. Controlling the movement of the sliding part 4 via a hydraulic control device has the following advantages: it effectively avoids electromagnetic interference between components caused by using an electromagnet drive device, making it easier to control surrounding components; it allows for precise control of hydraulic pressure and flow rate as needed, balancing the response speed and smoothness of the dog-tooth engagement structure 300's state changes, thus improving the smoothness of the dog-tooth engagement structure 300's engagement; the hydraulic control device does not require controlling current, and can smoothly control the engagement of the dog-tooth engagement structure 300 using the transmission's internal lubricating oil, making the control method simpler; compared to the traditional method of using a motor and lead screw for shifting or a motor and hub for shifting, the hydraulic control structure is simpler, more compact, and easier to arrange, which is beneficial for improving the integration and lightweighting of the transmission, while reducing development costs; compared to using a shift fork to drive the dog teeth, there is no need to consider the relative rotational speed of the dog teeth, and there is no problem of the shift fork passing through the gear ring causing additional axial force, thus avoiding the phenomenon of uneven shifting.

[0052] In some embodiments, see Figures 1 to 6 The sliding part 4 has a protrusion 9 extending axially along the input shaft 1 on the side opposite to the transmission gear 3. The transmission component 2 has a socket 10, and the protrusion 9 slides through the socket 10. The motion sensing part 7 is connected to the protruding end of the protrusion 9. The protrusion 9 allows for sliding adaptation between the sliding part 4 and the transmission component 2, and also better facilitates the penetration of the transmission component 2, thus providing a basis for installing the motion sensing part 7, resulting in a simpler and more compact structure. In addition, the adaptation between the protrusion 9 and the socket 10 also enables circumferential stopping of the sliding part 4 and the transmission component 2, preventing relative rotation between them. This eliminates the need for additional circumferential limiting structures. The integrated design of the protrusion 9 and the socket 10 further simplifies the structure.

[0053] Based on the above embodiments, see Figures 3 to 6 Multiple protrusions 9 are evenly distributed along the circumference of the sliding part 4, and multiple insertion holes 10 are evenly distributed along the circumference of the transmission part 2. Each protrusion 9 corresponds to one insertion hole 10. The arrangement of multiple protrusions 9 effectively increases the number of fitting points between the sliding part 4 and the transmission part 2. During the sliding process, the protrusions 9 are subjected not only to frictional force parallel to the axial direction of the input shaft 1, but also to the twisting force brought by the pushing part 5. Multiple fitting points can more effectively disperse the frictional force, avoiding excessive frictional force on a single protrusion 9 that would affect the smoothness of the sliding. At the same time, by dispersing the twisting force through multiple fitting points, the risk of breakage of the protrusions 9 is reduced, improving the reliability of use.

[0054] Among some possible implementations, see [link to relevant documentation]. Figures 3 to 6 The protrusion 9 is a convex shaft structure with a circular cross-section, and correspondingly, the insertion hole 10 is also a circular hole. The outer periphery of the protrusion 9 and the interior of the insertion hole 10 have no sharp edges. The twisting force on the protrusion 9 and the compressive force on the insertion hole 10 from the protrusion 9 can be more effectively dispersed on the outer periphery of the protrusion 9, thus avoiding the problem of local stress concentration at sharp edges and reducing the risk of structural damage to the area where the protrusion 9 and insertion hole 10 are located. Furthermore, the circular design also creates a ring-shaped gap between the protrusion 9 and the insertion hole 10, which has no corners and facilitates lubrication.

[0055] More specifically, to achieve lubrication between the socket 10 and the protrusion 9, see [reference needed]. Figure 2 The side wall of the insertion hole 10 is provided with a second lubrication groove 1010, which can hold lubricating oil to lubricate between the protrusion 9 and the transmission member 2, so as to ensure the smooth movement of the protrusion 9.

[0056] In some embodiments, see Figure 1 and Figure 2In some transmission structures with multiple planetary gear sets, the transmission component 2 is sleeved on the outer periphery of the input shaft 1, and the sliding part 4 is supported between the input shaft 1 and the transmission component 2, which helps to maintain the stability of the position of the transmission component 2 and the input shaft 1. Based on this, the outer and inner peripheral surfaces of the sliding part 4 are respectively provided with first lubrication grooves 401. The first lubrication grooves 401 can accommodate lubricating oil, which can form lubrication between the sliding part 4 and the transmission component 2, further improving the smoothness of the movement of the sliding part 4.

[0057] In other embodiments, see Figure 3 and Figure 6 The transmission component 2 is located at one end of the input shaft 1, and the input shaft 1 is coaxially arranged, but the input shaft 1 does not pass through the transmission component 2.

[0058] In some embodiments, see Figure 1 and Figure 2 The inner circumferential surface of the transmission component 2 is provided with a sliding adapter boss 210. The sliding adapter boss 210 is located on the side of the sliding part 4 away from the transmission gear 3, and an insertion hole 10 is provided on the sliding adapter boss 210. The sliding adapter boss 210 provides a sliding connection platform for the protrusion 9, which is convenient for fitting with the protrusion 9. On the other hand, it can also form a support between the transmission component 2 and the input shaft 1. In cooperation with the sliding part 4, it further improves the positional stability between the transmission component 2 and the input shaft 1.

[0059] Optionally, the sliding adapter boss 210 is a boss structure that is continuously distributed along the circumference of the transmission member 2. The sliding adapter boss 210 has strong structural integrity, which makes the sliding adapter boss 210 have high structural strength, improves the load-bearing capacity of the sliding adapter boss 210, and avoids structural damage such as deformation and cracking to the sliding adapter boss 210 during the movement of the sliding part 4.

[0060] In some embodiments, see Figure 1 , Figure 2 , Figure 4 and Figure 5 The sliding part 4 has a rotating adapter boss 410 on the side facing the transmission gear 3. A rotating adapter bearing 11 is sleeved on the outer periphery of the rotating adapter boss 410. The pushing part 5 is rotatably connected to the sliding part 4 through the rotating adapter bearing 11. The rotating adapter bearing 11 serves as a rotating connection component between the pushing part 5 and the sliding part 4, improving the smoothness of the rotation of the pushing part 5. At the same time, by providing the rotating adapter boss 410, the rotating adapter bearing 11 is supported, preventing the rotating adapter bearing 11 from falling off the sliding part 4 and ensuring the stability of the assembly.

[0061] See Figure 1In some embodiments of the pushing part 5, the pushing part 5 includes a first adapter section 510, a connecting section 520, and a second adapter section 530 connected sequentially. The first adapter section 510 is connected to the canine tooth engagement structure 300. The second adapter section 530 is located on the outer periphery of the first adapter section 510 and is connected and adapted to the bearing. The connecting section 520 supports and connects the first adapter section 510 and the second adapter section 530. The first adapter section 510 can be adaptively designed according to the structure of the canine tooth structure, and the second adapter section 530 can be adaptively designed according to the structure of the rotating adapter bearing 11. The connecting section 520 supports the first adapter section 510 and the second adapter section 530, ensuring the stability of their positions. The design of the first adapter section 510 and the second adapter section 530 is highly flexible.

[0062] In some implementations of the rotational adapter bearing 11, see [link to relevant documentation]. Figure 1 and Figure 2 The rotating adapter bearing 11 is a thrust bearing, which includes a first shaft ring 1110, a roller assembly 1120 and a second shaft ring 1130. The first shaft ring 1110 is connected to the push part 5 (specifically the second adapter section 530), the second shaft ring 1130 is sleeved on the outer periphery of the rotating adapter boss 410, and the roller assembly 1120 is sandwiched between the first shaft ring 1110 and the second shaft ring 1130.

[0063] The thrust bearing can withstand bidirectional axial loads. When the pusher part 5 and the sliding part 4 are axially connected, the thrust bearing can be sandwiched between the pusher part 5 and the sliding part 4 to bear the loads of both, which can better adapt to the action of the sliding part 4 driving the pusher part 5 to move axially along the input shaft 1. At the same time, in the thrust bearing, the moving parts (such as balls and needles) of the roller assembly 1120 are small in size and numerous, and the roller assembly 1120 is less affected by centrifugal force, making it more suitable for applications such as clutches that require high-speed rotation. In addition, due to the arrangement of the pusher part 5 and the sliding part 4 being axially connected, the kit design between the pusher part 5 and the sliding part 4 is avoided, which makes the structure of the drive piston 200 more compact in the radial direction, thereby optimizing the overall size of the planetary gearbox in the radial direction.

[0064] Optionally, the roller assembly 1120 can be a ball bearing assembly or a needle roller assembly. Taking the needle roller assembly as an example, it includes a needle roller cage and a plurality of needle rollers disposed in the needle roller cage. The relative rotation between the first shaft ring 1110 and the second shaft ring 1130 is achieved by the rolling of the needle rollers.

[0065] In some specific embodiments of the position sensing structure 400, one of the fixed sensing unit 8 and the movable sensing unit 7 is a magnetic induction sensor, and the other is a magnet. During the movement of the sliding unit 4, the magnetic field of the magnet changes relative to the magnetic induction sensor, thereby achieving distance measurement. The implementation of the magnetic induction sensor includes, but is not limited to, Hall effect sensors, magnetoresistive sensors, and magnetic proximity sensors. The specific structure of the sensor can be referenced from existing sensors and will not be elaborated here. The implementation of the magnet includes, but is not limited to, neodymium iron boron permanent magnets and magnetic steel. A magnetic induction sensor is a device capable of detecting changes in a magnetic field and converting them into electrical signals. It utilizes a combination of magnetic materials and electronic technology to achieve high-precision measurement of the magnetic field. Because the magnetic induction sensor uses a non-contact measurement method, it is less affected by wear and aging, has a longer service life, and better stability. The magnetic induction sensor has a fast response speed and can reflect changes in the magnetic field in real time, which is crucial for the dog-tooth joint structure 300, which requires a rapid response. Optionally, for ease of installation, the movable sensing unit 7 is a magnetic induction sensor, and the fixed sensing unit 8 is a magnet.

[0066] In other specific embodiments of the position sensing structure 400, one of the fixed sensing unit 8 and the movable sensing unit 7 is a photoelectric sensor, and the other is a baffle. The photoelectric sensor emits a light signal, which is reflected back to the receiving end of the photoelectric sensor by the baffle. The displacement distance is determined by judging the reflection time of the light signal. The photoelectric sensor can be implemented in ways including, but not limited to, fiber optic sensors and laser rangefinders. The specific structure of the sensor can be found in existing sensors and will not be described in detail here. Optionally, for ease of installation, the movable sensing unit 7 is a photoelectric sensor, and the fixed sensing unit 8 is a baffle.

[0067] It should be noted that, in order to simplify the structure, in the case where there are multiple protrusions 9, the motion sensing part 7 can be provided on one of the protrusions 9.

[0068] In some embodiments, see Figure 1The canine engagement structure 300 includes a first canine portion 12, a second canine portion 13, and an elastic element 14. The first canine portion 12 is disposed on the transmission gear 3. The second canine portion 13 is slidably connected to the input shaft 1 along the axial direction of the input shaft 1. The second canine portion 13 and the input shaft 1 are circumferentially stopped. The pusher 5 can drive the second canine portion 13 to move so that the second canine portion 13 and the first canine portion 12 can switch between an engaged state and a disengaged state. In the engaged state, the second canine portion 13 and the first canine portion 12 are engaged. The elastic element 14 is disposed between the input shaft 1 and the second canine portion 13 and is configured with a preload force to bring the second canine portion 13 closer to the first canine portion 12. Initially, the first canine tooth 12 and the second canine tooth 13 are engaged. Under the clamping action of the elastic member 14 and the pushing member 5, the second canine tooth 13 is fixed in position, and the pushing member 5, the first canine tooth 12, the second canine tooth 13, the transmission gear 3, and the input shaft 1 rotate synchronously. If it is necessary to switch to the separation state, the sliding member 4 moves toward the transmission gear 3, and the pushing member 5 pushes the second canine tooth 13 toward the transmission gear 3 while rotating, gradually separating it from the first canine tooth 12, and the elastic member 14 is compressed. When it is necessary to re-engage, the sliding member 4 moves away from the transmission gear 3, the elastic member 14 gradually releases its elastic energy, and pushes the pushing member 5 away from the transmission gear 3. By cooperating with the elastic element 14 and the pusher 5, the second canine tooth 13 is clamped on both sides, which can maintain the smooth operation of the second canine tooth 13 during movement and effectively fix the position of the second canine tooth 13 after it stops moving. At the same time, it can automatically reset during the process of switching from the separated state to the joined state, without the need to set up a complex connection structure between the pusher 5 and the second canine tooth 13.

[0069] Based on the above embodiments, see Figure 1 The engagement method of the second canine tooth 13 and the first canine tooth 12 is as follows: the transmission gear 3 is provided with a biting extension 310 on the side facing the push part 5, and the biting extension 310 and the input shaft 1 are spaced apart to form a receiving space 15; the biting extension 310 is provided with a first canine tooth 12 on the side facing the receiving space 15, and the second canine tooth 13 is provided in the receiving space 15; the input shaft 1 is provided with a limiting protrusion 16 located in the receiving space 15, the limiting protrusion 16 is located on the side of the second canine tooth 13 away from the push part 5, and the elastic member 14 is supported and connected between the limiting protrusion 16 and the second canine tooth 13, thereby limiting the displacement of the elastic member 14. By forming the receiving space 15, the elastic member 14, the first canine tooth portion 12 and the second canine tooth portion 13 are integrated into the same space member. The structure of the first canine tooth portion 12 and the second canine tooth portion 13 is simpler, the canine tooth connection structure 300 is more compact as a whole, and the canine tooth connection structure 300 can be protected by the biting extension portion 310, thereby improving the reliability of use.

[0070] Another way in which the second canine tooth 13 and the first canine tooth 12 are engaged is as follows: the transmission gear 3 is provided with a biting extension 310 on the side facing the pusher 5, and the biting extension 310 and the input shaft 1 are spaced apart to form a receiving space 15; the biting extension 310 is provided with a first canine tooth 12 on the side facing away from the receiving space 15, and the second canine tooth 13 is located outside the receiving space 15 and is L-shaped; the input shaft 1 is provided with a limiting protrusion 16 located in the receiving space 15, the limiting protrusion 16 is located on the side of the second canine tooth 13 facing away from the pusher 5, and the elastic member 14 is supported and connected between the limiting protrusion 16 and the second canine tooth 13, thereby limiting the displacement of the elastic member 14.

[0071] In some embodiments, see Figure 1 The second canine portion 13 is provided with a limiting groove 1310 on the side opposite to the push portion 5. The corresponding end of the elastic member 14 is inserted into the limiting groove 1310. The limiting groove 1310 can limit the displacement of the elastic member 14 in the radial direction of the input shaft 1, so as to prevent the elastic member 14 from deflecting.

[0072] Optionally, the elastic element 14 can be implemented in ways including but not limited to a spring (such as...). Figure 1 As shown), rubber sleeves, etc., are fitted around the outer periphery of the input shaft 1 to ensure that the second canine tooth part 13 is subjected to uniform force.

[0073] In some embodiments, see Figure 1 The outer peripheral surface of the input shaft 1 is provided with a shaft spline 17, and the side of the second canine portion 13 facing the input shaft 1 is provided with a canine spline 18 corresponding to the shaft spline 17. The shaft spline 17 and the canine spline 18 are slidably adapted to each other and can realize the circumferential stop of the second canine portion 13 and the input shaft 1.

[0074] In some embodiments, see Figure 1 In order to compress the size of the limiting protrusion 16 in the axial direction of the input shaft 1, the limiting protrusion 16 is a limiting baffle on the input shaft 1. The input shaft 1 is provided with a retaining ring 19, which abuts against the plate surface of the limiting baffle, thereby limiting the displacement of the limiting baffle in the axial direction of the input shaft 1.

[0075] In some embodiments, see Figure 1 The biting extension 310 is provided with a limiting step 320 on the side facing the receiving space 15. The limiting step 320 is located at the end of the receiving space 15 away from the pushing part 5. The limiting step 320 can abut against the side of the second canine tooth 13 away from the pushing part 5 to limit the maximum stroke of the second canine tooth 13 in the separated state.

[0076] Based on the same inventive concept, this application also provides a vehicle including the aforementioned planetary gearbox.

[0077] Compared with the prior art, the vehicle provided in this application has lower installation and maintenance costs for the internal position sensing structure 400 by adopting the aforementioned planetary gearbox. The position sensing structure 400's impact on the layout of surrounding components is effectively reduced, which not only helps to achieve a compact design of the planetary gearbox as a whole, but also reduces design difficulty. In addition, due to the improved position sensing accuracy, the stability and reliability of the dog-tooth engagement structure 300 are improved, thereby improving the smoothness of gear shifting.

[0078] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A planetary row transmission, characterized in that include: The transmission body (100) includes an input shaft (1), a transmission component (2) and a transmission gear (3). The transmission component (2) and the transmission gear (3) are distributed along the axial direction of the input shaft (1), and both can rotate about the central axis (6) of the input shaft (1). A drive piston (200) is disposed between the transmission member (2) and the transmission gear (3), and has a sliding part (4) and a pushing part (5). The sliding part (4) slides through the transmission member (2) and is circumferentially stopped with the transmission member (2). The pushing part (5) is rotatably connected to the sliding part (4) with the central axis (6) as the axis of rotation. The sliding part (4) can drive the pushing part (5) to slide along the axial direction of the input shaft (1). A canine tooth engagement structure (300) is provided between the input shaft (1) and the transmission gear (3), and the push part (5) can switch the canine tooth engagement structure (300) between an engaged state and a disengaged state during the sliding process; The position sensing structure (400) includes a moving sensing part (7) and a fixed sensing part (8). The moving sensing part (7) is connected to the through end of the sliding part (4), and the fixed sensing part (8) is fixed to the transmission member (2) and corresponds to the moving sensing part (7) to detect the moving distance of the sliding part (4).

2. The planetary row transmission of claim 1, wherein, The sliding part (4) has a protrusion (9) extending axially along the input shaft (1) on the side opposite to the transmission gear (3). The transmission member (2) has a socket (10). The protrusion (9) slides through the socket (10). The motion sensing part (7) is connected to the protruding end of the protrusion (9).

3. The planetary row transmission of claim 2, wherein, The protrusions (9) are evenly provided in multiple directions along the circumference of the sliding part (4), and the insertion holes (10) are evenly provided in multiple directions along the circumference of the transmission member (2). The protrusions (9) and the insertion holes (10) correspond one-to-one.

4. The planetary row transmission of claim 2, wherein, The transmission component (2) is sleeved on the outer periphery of the input shaft (1), and the sliding part (4) is supported between the input shaft (1) and the transmission component (2). The outer and inner peripheral surfaces of the sliding part (4) are respectively provided with a first lubrication groove (401), which can accommodate lubricating oil.

5. The planetary gearbox as described in claim 4, characterized in that, The inner circumferential surface of the transmission component (2) is provided with a sliding adapter boss (210). The sliding adapter boss (210) is located on the side of the sliding part (4) away from the transmission gear (3). The insertion hole (10) is provided on the sliding adapter boss (210).

6. The planetary row transmission of claim 4, wherein, The sliding part (4) has a rotating adapter boss (410) on the side facing the transmission gear (3). The outer periphery of the rotating adapter boss (410) is fitted with a rotating adapter bearing (11). The pushing part (5) is rotatably connected to the sliding part (4) through the rotating adapter bearing (11).

7. The planetary row transmission of claim 1, wherein, One of the fixed sensing unit (8) and the movable sensing unit (7) is a magnetic induction sensor, and the other of the fixed sensing unit (8) and the movable sensing unit (7) is a magnet.

8. The planetary row transmission of claim 1, wherein, The canine ligament (300) includes: The first canine tooth (12) is provided on the transmission gear (3); The second canine tooth (13) is slidably connected to the input shaft (1) along the axial direction of the input shaft (1) and is circumferentially stopped with the input shaft (1). The push part (5) can drive the second canine tooth (13) to move so that the second canine tooth (13) and the first canine tooth (12) can switch between a coupled state and a separated state. In the coupled state, the second canine tooth (13) and the first canine tooth (12) bite each other. An elastic element (14) is provided between the input shaft (1) and the second canine portion (13) and is configured with a preload force that brings the second canine portion (13) closer to the first canine portion (12).

9. The planetary row transmission of claim 8, wherein, The transmission gear (3) has a biting extension (310) on the side facing the pusher (5), and the biting extension (310) and the input shaft (1) form a receiving space (15) spaced apart; the biting extension (310) has a first canine tooth (12) on the side facing the receiving space (15), and the second canine tooth (13) is located in the receiving space (15); The input shaft (1) is provided with a limiting protrusion (16) located in the receiving space (15). The limiting protrusion (16) is located on the side of the second canine portion (13) away from the pushing portion (5). The elastic member (14) is supported and connected between the limiting protrusion (16) and the second canine portion (13).

10. A vehicle characterized by comprising: Including the planetary gearbox as described in any one of claims 1-9.

Images