A breakable torsion continuously variable servo planetary gear transmission

Abstract

The present invention relates to the technical field of transmissions, and specifically discloses a breakable-torsion continuously variable transmission servo planetary gear transmission, which includes a cross planetary input shaft, a transmission unit, a CVT primary pulley, a CVT secondary pulley, a secondary pulley connecting shaft, a pinion of the secondary pulley connecting shaft, and a large gear connecting the output shaft. The transmission unit is drivingly connected to the cross planetary input shaft, the CVT primary pulley is drivingly connected to the transmission unit, the CVT secondary pulley is drivingly connected to the CVT primary pulley, the secondary pulley connecting shaft, the pinion of the secondary pulley connecting shaft, and the large gear connecting the output shaft are drivingly connected, and the large gear connecting the output shaft is drivingly connected to the cross planetary input shaft. Compared with AT transmissions, DCT transmissions, and CVT transmissions, this transmission has a large load-bearing torque, fast and smooth speed change, a long service life, a simple structure and low manufacturing cost. At the same time, it also avoids the technical barriers of various types of transmissions and achieves the effect of energy conservation and emission reduction.

Description

Technical Field

[0001] The present invention relates to the technical field of transmissions, and in particular, to a torque-breakable continuously variable transmission servo planetary gear transmission. Background Art

[0002] A transmission is a mechanism used to change the rotational speed and torque from an engine. It can fix or shift gears to change the transmission ratio between the output shaft and the input shaft, and is also called a gearbox. Currently, the types of transmissions include AT transmissions, DCT transmissions, and CVT transmissions.

[0003] However, the above-mentioned transmissions also have their corresponding disadvantages. Their manufacturing processes are complex, the costs are high, the torque transmission losses are large, and the speed change process is not smooth. In addition, the CVT transmission depends entirely on the belt pulley and the steel belt or steel chain to carry the torque throughout the process, resulting in a small load-bearing torque, easy slippage between the steel belt and the belt pulley, easy overheating, and easy damage. In view of this, a continuously variable transmission is proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a torque-breakable continuously variable transmission servo planetary gear transmission, which has a simple manufacturing process, low cost, small torque transmission loss, smooth speed change process, and long service life.

[0005] To achieve the above purpose, a torque-breakable continuously variable transmission servo planetary gear transmission adopted by the present invention includes a cross planetary input shaft, a transmission unit, a CVT primary pulley, a CVT secondary pulley, a secondary pulley connecting shaft, a pinion on the secondary pulley connecting shaft, and a large gear connecting the output shaft. The transmission unit is in transmission connection with the cross planetary input shaft, the CVT primary pulley is in transmission connection with the transmission unit, the CVT secondary pulley is in transmission connection with the CVT primary pulley, the secondary pulley connecting shaft, the pinion on the secondary pulley connecting shaft, and the large gear connecting the output shaft are in transmission connection, and the large gear connecting the output shaft is in transmission connection with the cross planetary input shaft.

[0006] Among them, the transmission unit includes planetary gears, a sun gear with a clutch, a clutch secondary gear set, and a sun gear output shaft. The planetary gears are in transmission connection with the cross planetary input shaft, the sun gear with a clutch is in transmission connection with the planetary gears, the clutch secondary gear set is in transmission connection with the sun gear with a clutch and the CVT primary pulley respectively, and the sun gear output shaft is arranged on the cross planetary input shaft and cooperates with the planetary gears.

[0007] Among them, the torque-breakable continuously variable transmission servo planetary gear transmission further includes a synchronizer gear ring, and the synchronizer gear ring cooperates with the cross planetary input shaft and the sun gear output shaft respectively.

[0008] Among them, the breakable-torsion continuously variable servo planetary gear transmission further includes a CVT primary pulley shaft, and the CVT primary pulley shaft is in transmission connection with the CVT primary pulley.

[0009] Among them, the CVT primary pulley and the CVT secondary pulley are connected by a steel belt.

[0010] A breakable-torsion continuously variable servo planetary gear transmission according to the present invention has a large load-bearing torque, fast and smooth speed change process, long service life, simple structure and low manufacturing cost compared with AT transmissions, DCT transmissions and CVT transmissions. At the same time, it also avoids the technical barriers of various types of transmissions and realizes the function of energy conservation and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0012] Figure 1 It is a schematic structural diagram of the transmission in the vehicle starting state of the present invention for reducing the speed and increasing the torque.

[0013] Figure 2 It is a schematic structural diagram of the vehicle in the high-speed cruise state after starting of the present invention.

[0014] 1 - Cross planetary input shaft, 2 - Planetary gear, 3 - Sun gear with clutch, 4 - Clutch secondary gear set, 5 - CVT primary pulley, 6 - CVT secondary pulley, 7 - Secondary pulley connecting shaft, 8 - Small gear of secondary pulley connecting shaft, 9 - Large gear connecting to output shaft, 10 - Sun gear output shaft, 11 - Synchronizer gear ring with teeth, 12 - CVT primary pulley shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The following details the embodiments of the present invention. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0016] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, in the description of the present invention, the meaning of "a plurality of" is two or more unless otherwise specifically defined.

[0017] Please refer to Figure 1 and Figure 2 , the present invention provides a breakable-torsion continuously variable servo planetary gear transmission, including a cross planetary input shaft 1, a transmission unit, a CVT primary pulley 5, a CVT secondary pulley 6, a secondary pulley connecting shaft 7, a secondary pulley connecting shaft pinion 8, and an output shaft connecting gear 9. The transmission unit is drivingly connected to the cross planetary input shaft 1, the CVT primary pulley 5 is drivingly connected to the transmission unit, the CVT secondary pulley 6 is drivingly connected to the CVT primary pulley 5, the secondary pulley connecting shaft 7, the secondary pulley connecting shaft pinion 8, and the output shaft connecting gear 9 are drivingly connected, and the output shaft connecting gear 9 is drivingly connected to the cross planetary input shaft 1.

[0018] The transmission unit includes a planetary gear 2, a sun gear with clutch 3, a clutch secondary gear set 4, and a sun gear output shaft 10. The planetary gear 2 is drivingly connected to the cross planetary input shaft 1, the sun gear with clutch 3 is drivingly connected to the planetary gear 2, the clutch secondary gear set 4 is respectively drivingly connected to the sun gear with clutch 3 and the CVT primary pulley 5, the sun gear output shaft 10 is arranged on the cross planetary input shaft 1 and cooperates with the planetary gear 2.

[0019] The breakable-torsion continuously variable servo planetary gear transmission further includes a synchronizer gear ring sleeve 11, and the synchronizer gear ring sleeve 11 respectively cooperates with the cross planetary input shaft 1 and the sun gear output shaft 10.

[0020] The breakable-torsion continuously variable servo planetary gear transmission further includes a CVT primary pulley shaft 12, and the CVT primary pulley shaft 12 is drivingly connected to the CVT primary pulley 5.

[0021] The CVT primary pulley 5 and the CVT secondary pulley 6 are connected by a steel belt.

[0022] As Figure 1As shown in the figure, when the cross planetary input shaft 1 inputs torque to the planetary gear 2, the planetary gear 2 conducts the torque to the clutch sun gear 3 and the sun gear output shaft 10. When the resistance of the sun gear output shaft 10 is large, the clutch sun gear 3 separates and idles, and the vehicle is in a standby state at this time.

[0023] When the vehicle needs to output starting torque, the internal clutch plates of the clutch sun gear 3 are combined to drive the clutch secondary gear set 4. The clutch secondary gear set 4 conducts the torque to the CVT primary pulley 5. At this time, the CVT primary pulley 5 reduces the speed and increases the torque through the steel belt to the CVT secondary pulley 6. The CVT secondary pulley 6 conducts the torque to the pinion of the secondary pulley connecting shaft 7 through the secondary pulley connecting shaft 7. The pinion of the secondary pulley connecting shaft 7 reduces the speed and increases the torque again to the large gear connecting the output shaft 9. The large gear connecting the output shaft 9 drives the sun gear output shaft 10 to rotate and output torque. In this transmission process, the planetary gear 2 plays a lever role, and the CVT bears part of the torque, and the vehicle completes a start.

[0024] As Figure 2 shown, it represents the process of the vehicle accelerating to high-speed cruise. By changing the speed ratio of the CVT primary pulley 5 and the CVT secondary pulley 6, the torque distributed by the planetary gear 2 to the clutch sun gear 3 and the sun gear output shaft 10 can be changed. At the same time, the speed ratio of the cross planetary input shaft 1 and the sun gear output shaft 10, and the output torque of the sun gear output shaft 10 are changed to complete the acceleration.

[0025] When the rotational speeds of the cross planetary input shaft 1 and the sun gear output shaft 10 are close, the synchronizer gear ring sleeve 11 slides to the right (or the clutch is combined) to lock the cross planetary input shaft 1 and the sun gear output shaft 10. At the same time, the internal clutch of the clutch sun gear 3 separates, making the CVT in an unloaded state. The cross planetary input shaft 1 directly conducts the torque to the sun gear output shaft 10 to complete the high-speed cruise of the vehicle. Among them, the process of decelerating and stopping can be achieved by reversing this process. This description only explains the working principle of the machinery, and the electronic control and hydraulic control parts can apply the control units of CVT, AT, and DCT transmissions.

[0026] In summary, during the working process of a torque-breakable continuously variable servo planetary gear transmission of the present invention, the continuously variable transmission only bears part of the torque in the low-speed range and can disconnect the load-bearing torque and be in an unloaded state in the high-speed range, allowing the input shaft to be directly connected to the output shaft to output torque. Compared with AT and DCT transmissions, it has a simple manufacturing process, low cost, small torque transmission loss, and a smooth speed change process. Compared with CVT transmissions: the torque-breakable continuously variable servo planetary gear transmission has a large load-bearing torque, solving the congenital defects of ordinary CVT transmissions that rely entirely on the belt pulley and steel belt or steel chain to bear torque during the working process, resulting in a small load-bearing torque, easy slipping between the steel belt and the belt pulley, easy overheating, and easy damage.

[0027] The above-disclosed is only a preferred embodiment of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the invention.

Claims

1. A breakable-torsion continuously variable servo planetary gear transmission, characterized in that, It includes a cross planetary input shaft, a transmission unit, a CVT primary pulley, a CVT secondary pulley, a secondary pulley connecting shaft, a pinion gear on the secondary pulley connecting shaft and a large gear connecting the output shaft. The transmission unit is in transmission connection with the cross planetary input shaft. The CVT primary pulley is in transmission connection with the transmission unit. The CVT secondary pulley is in transmission connection with the CVT primary pulley. The secondary pulley connecting shaft, the pinion gear on the secondary pulley connecting shaft and the large gear connecting the output shaft are in transmission connection, and the large gear connecting the output shaft is in transmission connection with the cross planetary input shaft; The transmission unit includes a planetary gear, a sun gear with a clutch, a clutch secondary gear set, and a sun gear output shaft. The planetary gear is in transmission connection with the cross planetary input shaft. The sun gear with a clutch is in transmission connection with the planetary gear. The clutch secondary gear set is respectively in transmission connection with the sun gear with a clutch and the CVT primary pulley. The sun gear output shaft is arranged on the cross planetary input shaft and cooperates with the planetary gear.

2. The breakable-torsion continuously variable servo planetary gear transmission according to claim 1, characterized in that, The breakable-torsion continuously variable transmission servo planetary gear transmission further includes a synchronizer gear ring sleeve, and the synchronizer gear ring sleeve respectively cooperates with the cross planetary input shaft and the sun gear output shaft.

3. The breakable-torsion continuously variable servo planetary gear transmission according to claim 2, characterized in that, The breakable-torsion continuously variable transmission servo planetary gear transmission further includes a CVT primary pulley shaft, and the CVT primary pulley shaft is in transmission connection with the CVT primary pulley.

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