Translation shifting structure of sandwich power take-off

Abstract

The utility model provides a kind of translation type gear shifting structure of sandwich power take-off device, comprising: shell, input shaft, power take-off shaft, gear mechanism and translation gear shifting mechanism, input shaft input power, gear mechanism transmission power, translation gear shifting mechanism driving gear moves along input shaft axial direction, realizes power on-off.By translation gear shifting mechanism driving gear mechanism axial translation along input shaft, make the direction of gear shifting force and gear meshing or the axial direction of disengagement, so that the transmission of force is more direct, uniform, avoid the radial eccentric force generated by rotating action.The contact of meshing tooth surface is progressive when gear mechanism translates along axial direction, realize the smooth transition of gear combination and separation, effectively eliminate the sense of frustration and impact, reduce the risk of gear tooth and component deformation, thereby effectively prolong the service life of sandwich power take-off device, reduce failure, reduce maintenance cost, improve equipment operation reliability and stability.

Description

Technical Field

[0001] This utility model relates to the field of automotive equipment technology, and in particular to a translational shifting structure for a sandwich power take-off. Background Technology

[0002] A sandwich power take-off (PTO) consists of one or more sets of transmission gears, also known as a power output device. It is generally composed of a gearbox, clutch, and controller, and is connected to the low-gear or auxiliary gearbox input shaft to output power to an external working device.

[0003] Currently, most existing sandwich power take-offs (PTOs) use rotary shift forks. During operation, the rotation of these forks causes uneven force distribution during gear shifting, resulting in uneven gear engagement and disengagement, leading to noticeable jerking and impact. This uneven shifting not only affects the stability of the equipment but also causes additional wear on related components, significantly shortening the equipment's lifespan and increasing maintenance costs. Summary of the Invention

[0004] This utility model provides a translational shifting structure for a sandwich power take-off (PTO) to solve the problem of uneven shifting in existing sandwich PTOs that use a rotary shifting fork.

[0005] This utility model provides a translational shifting structure for a sandwich power take-off, comprising:

[0006] case;

[0007] An input shaft, mounted on the housing, is used to input power into the sandwich power take-off unit;

[0008] A power take-off shaft is mounted on the housing, and a gear mechanism is provided between the power take-off shaft and the input shaft. The gear mechanism is used to transmit the power of the input shaft to the power take-off shaft.

[0009] A translation shift mechanism is mounted on the housing and is connected to the gear mechanism. The translation shift mechanism is used to drive the gear mechanism to move axially along the input shaft to switch the connection or disconnection between the input shaft and the power take-off shaft.

[0010] In one embodiment of the present invention, the gear mechanism includes an input gear, an idler gear, and an output gear. The input gear is disposed on the input shaft, and the output gear is disposed on the power take-off shaft. When the sandwich power take-off is in the power take-off state, the idler gear meshes with the input gear and the output gear. When the sandwich power take-off is in the neutral state, the idler gear meshes with the output gear, and the input gear rotates freely.

[0011] In one embodiment of the present invention, the translation shifting mechanism includes a piston assembly, a shift fork, and a driving component; the piston assembly is mounted on the housing, and the direction of movement of the piston assembly is the axial direction of the input shaft; the shift fork is connected to the piston assembly and is connected to the idler gear; the driving component is used to drive the piston assembly to move the shift fork along the axial direction of the input shaft, so as to drive the idler gear to move along the axial direction of the input shaft, so as to engage or disengage the idler gear with the input gear.

[0012] In one embodiment of the present invention, the piston assembly includes a cylinder liner, a piston head, and a piston rod. The cylinder liner is disposed on the housing, the piston head is slidably connected to the cylinder liner, the piston rod is connected to the piston head, and the shift fork is connected to the piston rod.

[0013] In one embodiment of the present invention, the housing is provided with a limiting component, the limiting component is coaxially arranged with the piston rod, and the limiting component is used to abut against the end of the piston rod away from the piston head along the axial direction to limit the movement stroke of the piston head.

[0014] In one embodiment of this utility model, the driving component is a cable, which includes a pull rod, a connecting rod, and a connecting shaft. The pull rod is connected to the piston head. The connecting rod is provided with an operating end, a shaft hole, and a hinge portion along its length. The hinge portion is hinged to the end of the pull rod away from the piston head along its length. The shaft hole is rotatably connected to the connecting shaft. The operating end is used to drive the connecting rod to rotate around the connecting shaft, so as to drive the pull rod to move the piston rod axially along the input shaft.

[0015] In one embodiment of this utility model, the driving component is an air source device. The driving component is used to output compressed air to drive the piston head to slide along the axial direction of the cylinder liner, thereby driving the piston rod to move along the axial direction of the input shaft. An elastic reset member is provided between the housing and the piston rod. When the air source device outputs compressed air to drive the piston assembly to drive the idler wheel to mesh with the input gear, the elastic reset member is in a compressed state. When the air source device disconnects the compressed air output, the elastic reset member is used to push the piston assembly to drive the idler wheel to disengage from the input gear.

[0016] In one embodiment of the present invention, the housing is provided with an idler wheel shaft, and a sliding sleeve is coaxially sleeved on the idler wheel shaft, and the idler wheel is slidably connected to the sliding sleeve.

[0017] In one embodiment of the present invention, the idler wheel is provided with a shift fork groove, and the shift fork is fitted into the shift fork groove.

[0018] In one embodiment of the present invention, one end of the input shaft is used to connect to the clutch, and the other end is connected to the transmission. The input shaft is provided with splines, and the input shaft is splinedly connected to the clutch disc.

[0019] The beneficial effects of this utility model are as follows: This utility model proposes a translational shifting structure for a sandwich power take-off (PTO). The translational shifting mechanism drives the gear mechanism to translate axially along the input shaft, aligning the direction of the shifting force with the axial direction of gear engagement or disengagement. This results in more direct and uniform force transmission, avoiding radial eccentricity caused by rotational movements. During axial translation, the contact between the meshing tooth surfaces is progressive, achieving a smooth transition between gear engagement and disengagement, effectively eliminating jerking and impact. Furthermore, the smooth shifting process and uniform force distribution effectively reduce the risk of tooth breakage and component deformation during engagement and disengagement, thereby extending the overall service life of the sandwich PTO. This application, by driving the gear mechanism to translate axially along the input shaft through the translational shifting mechanism, effectively reduces gear failures caused by impact and wear, thus lowering the maintenance frequency and repair costs. Simultaneously, the smooth power switching makes the sandwich PTO more reliable during operation, effectively improving the overall stability of the equipment. Attached Figure Description

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

[0021] In the attached diagram:

[0022] Figure 1 This is a schematic diagram of the translational shifting structure of a sandwich power take-off provided in an embodiment of the present invention;

[0023] Figure 2 This is a cross-sectional view of the sandwich power take-off device in neutral state according to one embodiment of the present invention;

[0024] Figure 3 This is a schematic cross-sectional view of the power take-off state of the sandwich power take-off device provided in one embodiment of the present utility model;

[0025] Figure 4 This is a partial schematic diagram of a sandwich power take-off cable-driven translational shifting structure provided in one embodiment of the present invention.

[0026] The attached figures are labeled as follows:

[0027] 1. Housing, 101. Idler shaft, 102. Sliding sleeve, 2. Input shaft, 201. Spline, 3. Power take-off shaft, 4. Gear mechanism, 401. Input gear, 402. Idler gear, 402a. Shift fork groove, 403. Output gear, 5. Translation shifting mechanism, 501. Piston assembly, 501a. Cylinder liner, 501b. Piston head, 501c. Shift fork, 502. Limiting component, 6. Cable, 7. Pull rod, 701. Connecting rod, 702. Operating end, 702a. Shaft hole, 702b. Hinge, 702c. Connecting shaft, 703. Elastic reset component, 8. Detailed Implementation

[0028] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0029] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0030] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0031] Please combine Figures 1 to 4 As shown, this utility model provides a translational shifting structure for a sandwich power take-off.

[0032] In an exemplary embodiment of this application, the translational shifting structure of the sandwich power take-off includes:

[0033] Casing 1;

[0034] Input shaft 2 is mounted on housing 1 and is used to input power into the sandwich power take-off unit.

[0035] The power take-off shaft 3 is mounted on the housing 1. A gear mechanism 4 is provided between the power take-off shaft 3 and the input shaft 2. The gear mechanism 4 is used to transmit the power of the input shaft 2 to the power take-off shaft 3.

[0036] The translation shift mechanism 5 is mounted on the housing 1 and is connected to the gear mechanism 4. The translation shift mechanism 5 is used to drive the gear mechanism 4 to move axially along the input shaft 2 to switch the connection or disconnection between the input shaft 2 and the power take-off shaft 3.

[0037] In this embodiment, housing 1 is connected between clutch housing and transmission housing. The gear mechanism 4 is driven to translate axially along input shaft 2 via translational shifting mechanism 5, aligning the direction of shifting force with the axial direction of gear engagement or disengagement. This results in more direct and uniform force transmission, avoiding radial eccentricity caused by rotational movements. During axial translation of gear mechanism 4, the contact of the meshing tooth surfaces is progressive, achieving a smooth transition between gear engagement and disengagement, effectively eliminating jerking and impact. Furthermore, the smooth shifting process and uniform force distribution effectively reduce the risk of gear breakage and component deformation during engagement and disengagement, thereby extending the overall service life of the sandwich power take-off. This application effectively reduces failures caused by impact and wear of gear mechanism 4 by driving gear mechanism 4 axially along input shaft 2 via translational shifting mechanism 5, thus reducing equipment maintenance frequency and repair costs. Simultaneously, the smooth power switching makes the sandwich power take-off more reliable during operation, effectively improving the overall equipment's operational stability.

[0038] In an exemplary embodiment of this application, the gear mechanism 4 includes an input gear 401, an idler gear 402, and an output gear 403. The input gear 401 is disposed on the input shaft 2, and the output gear 403 is disposed on the power take-off shaft 3. When the sandwich power take-off is in the power take-off state, the idler gear 402 meshes with the input gear 401 and the output gear 403. When the sandwich power take-off is in the neutral state, the idler gear 402 meshes with the output gear 403, and the input gear 401 rotates freely.

[0039] In this embodiment, the sandwich power take-off (PTO) includes a power take-off state and a neutral state. In the power take-off state, the input shaft 2 is connected to the engine via a clutch, and the input gear 401 rotates synchronously with the input shaft 2. The translational shifting mechanism 5 drives the idler wheel 402 to move axially along the input shaft 2, simultaneously engaging with both the input gear 401 and the output gear 403. The power path is: input shaft 2, input gear 401, idler wheel 402, output gear 403, and power take-off shaft 3, ultimately transmitting power to external equipment. In the neutral state, the translational shifting mechanism 5 drives the idler wheel shaft 101 to move axially, engaging only with the output gear 403 and disengaging from the input gear 401. The input gear 401 idles, and power cannot be transmitted to the output gear 403, causing the power take-off shaft 3 to stop rotating. Through the axial translation of the idler wheel 402, the operating state of the sandwich PTO can be quickly and reliably switched to meet different working conditions. Compared to traditional multi-gear shifting mechanisms, this embodiment only requires controlling the axial position of the idler gear 402 to achieve power switching, resulting in a compact structure and simple operation. During gear meshing, the smoothness of axial translation reduces impact loads, lowers wear and fatigue on gear teeth, and extends component life. In neutral, the idler gear 402 remains engaged with the output gear 403, avoiding impacts and noise caused by frequent gear disengagement, while keeping the system in a pre-engaged state, shortening the response time for subsequent power take-off.

[0040] In an exemplary embodiment of this application, the translation shifting mechanism 5 includes a piston assembly 501, a shift fork 502, and a driving component; the piston assembly 501 is mounted on the housing 1, and the direction of movement of the piston assembly 501 is the axial direction of the input shaft 2; the shift fork 502 is connected to the piston assembly 501, and the shift fork 502 is connected to the idler wheel 402; the driving component is used to drive the piston assembly 501 to drive the shift fork 502 to translate along the axial direction of the input shaft 2, so as to drive the idler wheel 402 to translate along the axial direction of the input shaft 2, so that the idler wheel 402 engages or disengages from the input gear 401.

[0041] In this embodiment, the driving component includes, but is not limited to, a pneumatic system or a mechanical linkage 702. The driving component pushes the piston assembly 501 to move axially along the input shaft 2. The piston assembly 501 drives the idler wheel 402 to translate axially along the input shaft 2, causing the sandwich power take-off to switch between power take-off and neutral states. In power take-off state, the idler wheel 402 translates to mesh with both the input gear 401 and the output gear 403, and power is transmitted from the input shaft 2 to the power take-off shaft 3 via the gear mechanism 4. In neutral state, the idler wheel 402 translates to mesh only with the output gear 403, the input gear 401 idles, and power is cut off. The linear motion of the piston assembly 501 is consistent with the axial direction of the input shaft 2, ensuring the precise translation path of the idler wheel 402 and avoiding poor gear meshing due to misalignment. Furthermore, the uniform linear motion of the piston assembly 501 reduces shifting shock, significantly improving the jerky feeling compared to the traditional rotary shift fork 502.

[0042] In an exemplary embodiment of this application, the piston assembly 501 includes a cylinder liner 501a, a piston head 501b, and a piston rod 501c. The cylinder liner 501a is disposed on the housing 1, the piston head 501b is slidably connected to the cylinder liner 501a, the piston rod 501c is connected to the piston head 501b, and the shift fork 502 is connected to the piston rod 501c.

[0043] In this embodiment, the piston assembly 501 is structurally designed to be compatible with pneumatic, hydraulic, or mechanical drives, enhancing the versatility of the shifting structure and adapting to the power source requirements of different equipment. The sliding fit between the piston head 501b and the cylinder liner 501a provides guidance for axial movement and limits radial offset. Combined with the engagement of the shift fork 502 and the idler wheel 402, it ensures stable posture of the idler wheel 402 during translation, uniform contact of the gear meshing surfaces, and reduces tooth surface wear. Compared to the rotational action of the rotary shift fork 502, the axial linear motion of the piston assembly 501 completely eliminates radial eccentric force. Combined with the stable transmission of the shift fork 502, this makes the force on the idler wheel 402 more uniform during shifting, reducing jerking impact.

[0044] In an exemplary embodiment of this application, a limiting member 6 is provided on the housing 1. The limiting member 6 is coaxially arranged with the piston rod 501c. The limiting member 6 is used to abut against the end of the piston rod 501c away from the piston head 501b along the axial direction to limit the movement stroke of the piston head 501b.

[0045] In this embodiment, the limiting component 6 is coaxially arranged with the piston rod 501c and fixed to the housing 1. When the driving component pushes the piston assembly 501 to move axially, the end of the piston rod 501c away from the piston head 501b gradually approaches the limiting component 6 and abuts against it. Through the abutting engagement between the piston rod 501c and the limiting component 6, the maximum movement distance of the piston rod 501c is limited, ensuring that the meshing depth of the idler gear 402 with the input gear 401 and the output gear 403 is within the optimal range. This avoids the problems of excessive meshing leading to gear seizing or insufficient meshing leading to unstable power transmission that may occur with an unlimited limiting structure.

[0046] In an exemplary embodiment of this application, the driving component is a cable 7, which includes a pull rod 701, a connecting rod 702, and a connecting shaft 703. The pull rod 701 is connected to the piston head 501b. The connecting rod 702 is provided with an operating end 702a, a shaft hole 702b, and a hinge portion 702c in sequence along its length. The hinge portion 702c is hinged to one end of the pull rod 701 away from the piston head 501b along its length. The shaft hole 702b is rotatably connected to the connecting shaft 703. The operating end 702a is used to drive the connecting rod 702 to rotate around the connecting shaft 703, so as to drive the pull rod 701 to move the piston rod 501c along the axial direction of the input shaft 2.

[0047] In this embodiment, by inputting external force into the operating end 702a of the connecting rod 702, it rotates around the connecting shaft 703. When the connecting rod 702 rotates around the connecting shaft 703, the hinge part 702c drives the pull rod 701 to move axially along the input shaft 2. The axial movement of the pull rod 701 pushes the piston head 501b to slide along the cylinder liner 501a, and the piston rod 501c moves synchronously, driving the shift fork 502 and the idler wheel 402 to translate axially. In the power take-off state, the rotation of the connecting rod 702 causes the pull rod 701 to push the piston assembly 501, and the idler wheel 402 meshes with the input gear 401 and the output gear 403. In the neutral state, the connecting rod 702 rotates in the opposite direction, the pull rod 701 pulls the piston assembly 501 to reset, and the idler wheel 402 disengages from the input gear 401. Through the structural design of the cable 7, the force of the operating end 702a can be transmitted to the piston assembly 501, which is far from the operating point, to realize the gear switching of the sandwich power take-off. Compared to hydraulic or pneumatic drives, the cable 7 structure requires no additional power source and can shift gears solely through mechanical means, reducing system complexity and manufacturing costs.

[0048] In an exemplary embodiment of this application, the driving component is an air source device. The driving component is used to output compressed air to drive the piston head 501b to slide axially along the cylinder liner 501a, so as to drive the piston rod 501c to move axially along the input shaft 2. An elastic reset member 8 is provided between the housing 1 and the piston rod 501c. When the air source device outputs compressed air to drive the piston assembly 501 to drive the idler wheel 402 to mesh with the input gear 401, the elastic reset member 8 is in a compressed state. When the air source device disconnects the compressed air output, the elastic reset member 8 is used to push the piston assembly 501 to drive the idler wheel 402 to disengage from the input gear 401.

[0049] In this embodiment, during power take-off (PTO) switching, the air source device outputs compressed air, which enters the cylinder liner 501a of the piston assembly 501, pushing the piston head 501b to slide axially. The piston rod 501c drives the shift fork 502 and idler wheel 402 to move towards the input gear 401 until the idler wheel 402 is fully engaged with the input gear 401 and the output gear 403. In PTO mode, the elastic reset member 8 is compressed, storing elastic potential energy. During neutral mode switching, the air source device disconnects the compressed air output, the air pressure inside the cylinder liner 501a decreases, and the compressed elastic reset member 8 releases its potential energy, pushing the piston assembly 501 to move in the opposite direction, causing the idler wheel 402 to retract to a position that only engages with the output gear 403, while the input gear 401 idles. By driving the piston assembly 501 with compressed air, rapid gear switching is achieved with a short shift response time; the elastic reset member 8 ensures that the piston assembly 501 automatically resets to the neutral state when the air source is disconnected.

[0050] In an exemplary embodiment of this application, the housing 1 is provided with an idler shaft 101, and a sliding sleeve 102 is coaxially sleeved on the idler shaft 101, with the idler 402 slidably connected to the sliding sleeve 102.

[0051] In this embodiment, the idler shaft 101 is fixed to the housing 1, and the sliding sleeve 102 is coaxially sleeved on the outside of the idler shaft 101, with a clearance fit between the sliding sleeve 102 and the idler shaft 101. When the shift fork 502 drives the idler wheel 402 to translate axially, the idler wheel 402 slides along the outer surface of the sliding sleeve 102, while the sliding sleeve 102 and the idler shaft 101 remain relatively stationary. During power transmission, the input gear 401 drives the idler wheel 402 to rotate, and the idler wheel 402 rotates freely on the idler shaft 101 through the sliding sleeve 102, achieving circumferential rotation. By designing the sliding sleeve 102 as an intermediate layer, the direct friction between the idler wheel 402 and the idler shaft 101 is transformed into a dual sliding between the idler wheel 402 and the sliding sleeve 102, and between the sliding sleeve 102 and the idler shaft 101, reducing frictional resistance and making the translation of the idler wheel 402 smoother.

[0052] In an exemplary embodiment of this application, the idler wheel 402 is provided with a shift fork groove 402a, and the shift fork 502 is fitted into the shift fork groove 402a.

[0053] In this embodiment, an annular fork groove 402a is provided on the outer circular surface of the idler wheel 402. The working end of the fork 502 is embedded in the fork groove 402a to form a clearance fit. The other end of the fork 502 is fixedly connected to the piston rod 501c. The fork 502 moves synchronously with the piston rod 501c. The side of the fork groove 402a contacts the fork 502, transmitting the axial thrust to the idler wheel 402 and driving the idler wheel 402 to translate axially along the idler wheel shaft 101.

[0054] In an exemplary embodiment of this application, one end of the input shaft 2 is used to connect to the clutch, and the other end is connected to the transmission. The input shaft 2 is provided with a spline 201, and the input shaft 2 is connected to the clutch disc spline 201.

[0055] In this embodiment, one end of the input shaft 2 is connected to the clutch plate via a spline 201. The clutch plate contacts the engine flywheel, and the engagement or disengagement of the clutch controls the power input or disconnection of the input shaft 2. The other end of the input shaft 2 is connected to the transmission. The power path is engine, clutch, input shaft 2, and transmission. The sandwich power take-off (PTO) diverts power to the power take-off shaft 3 via the input gear 401 on the input shaft 2. When the sandwich PTO is in the power take-off state, the input shaft 2 transmits power to both the transmission and the power take-off shaft 3. When the sandwich PTO is in neutral, all the power from the input shaft 2 flows to the transmission, driving the vehicle.

[0056] The working principle involves driving the gear mechanism 4 to translate axially along the input shaft 2 via the translation shifting mechanism 5. This aligns the direction of the shifting force with the axial direction of gear engagement or disengagement, resulting in more direct and uniform force transmission and avoiding radial eccentricity caused by rotational movements. During axial translation, the contact between the meshing tooth surfaces of the gear mechanism 4 is progressive, achieving a smooth transition between gear engagement and disengagement, effectively eliminating jerking and impact. Furthermore, the smooth shifting process and uniform force distribution effectively reduce the risk of tooth breakage and component deformation during engagement and disengagement of the gear mechanism 4, thereby extending the overall service life of the sandwich power take-off unit. This application effectively reduces failures caused by impact and wear of the gear mechanism 4 by driving it axially along the input shaft 2 via the translation shifting mechanism 5, thus lowering the maintenance frequency and repair costs. Simultaneously, the smooth power switching makes the sandwich power take-off unit more reliable during operation, effectively improving the overall stability of the equipment.

[0057] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A translational shifting structure for a sandwich power take-off, characterized in that, include: case; An input shaft, mounted on the housing, is used to input power into the sandwich power take-off unit; A power take-off shaft is mounted on the housing, and a gear mechanism is provided between the power take-off shaft and the input shaft. The gear mechanism is used to transmit the power of the input shaft to the power take-off shaft. A translation shift mechanism is mounted on the housing and is connected to the gear mechanism. The translation shift mechanism is used to drive the gear mechanism to move axially along the input shaft to switch the connection or disconnection between the input shaft and the power take-off shaft.

2. The translational shifting structure of the sandwich power take-off according to claim 1, characterized in that: The gear mechanism includes an input gear, an idler gear, and an output gear. The input gear is mounted on the input shaft, and the output gear is mounted on the power take-off shaft. When the sandwich power take-off is in power take-off mode, the idler gear meshes with the input gear and the output gear. When the sandwich power take-off is in neutral, the idler gear meshes with the output gear, and the input gear idles.

3. The translational shifting structure of the sandwich power take-off according to claim 2, characterized in that: The translation shifting mechanism includes a piston assembly, a shift fork, and a drive component; the piston assembly is mounted on the housing, and the direction of movement of the piston assembly is the axial direction of the input shaft; The shift fork is connected to the piston assembly and is connected to the idler wheel. The driving component is used to drive the piston assembly to move the shift fork axially along the input shaft, so as to drive the idler wheel axially along the input shaft, so as to engage or disengage the idler wheel with the input gear.

4. The translational shifting structure of the sandwich power take-off according to claim 3, characterized in that: The piston assembly includes a cylinder liner, a piston head, and a piston rod. The cylinder liner is disposed on the housing, the piston head is slidably connected to the cylinder liner, the piston rod is connected to the piston head, and the shift fork is connected to the piston rod.

5. The translational shifting structure of the sandwich power take-off according to claim 4, characterized in that: The housing is provided with a limiting component, which is coaxially arranged with the piston rod. The limiting component is used to abut against the end of the piston rod away from the piston head along the axial direction to limit the movement stroke of the piston head.

6. The translational shifting structure of the sandwich power take-off according to claim 5, characterized in that: The driving component is a cable, which includes a pull rod, a connecting rod, and a connecting shaft. The pull rod is connected to the piston head. The connecting rod has an operating end, a shaft hole, and a hinge portion along its length. The hinge portion is hinged to the end of the pull rod away from the piston head along its length. The shaft hole is rotatably connected to the connecting shaft. The operating end is used to drive the connecting rod to rotate around the connecting shaft, thereby driving the pull rod to move the piston rod axially along the input shaft.

7. The translational shifting structure of the sandwich power take-off according to claim 5, characterized in that: The driving component is an air source device. The driving component is used to output compressed air to drive the piston head to slide along the axial direction of the cylinder liner, so as to drive the piston rod to move along the axial direction of the input shaft. An elastic reset member is provided between the housing and the piston rod. When the air source device outputs compressed air to drive the piston assembly to drive the idler wheel to mesh with the input gear, the elastic reset member is in a compressed state. When the air source device disconnects the compressed air output, the elastic reset member is used to push the piston assembly to disengage the idler wheel from the input gear.

8. The translational shifting structure of the sandwich power take-off according to claim 3, characterized in that: The housing is provided with an idler wheel shaft, and a sliding sleeve is coaxially sleeved on the idler wheel shaft, with the idler wheel and the sliding sleeve being slidably connected.

9. The translational shifting structure of the sandwich power take-off according to claim 8, characterized in that: The idler wheel is provided with a fork groove, and the fork is fitted into the fork groove.

10. The translational shifting structure of the sandwich power take-off according to claim 1, characterized in that: One end of the input shaft is used to connect to the clutch, and the other end is connected to the transmission. The input shaft is provided with splines, and the input shaft is splinedly connected to the clutch disc.

Images