Hydraulic control internal gearing speed control system for vehicle

Abstract

The invention discloses a hydraulic control internal meshing speed change system for a vehicle. The hydraulic control internal meshing speed change system is composed of a constant-pressure hydraulic oil pump assembly, a clutch assembly, an internal meshing gear speed changing box and a hydraulic control system. The system achieves starting, gear shifting and pressure stabilizing operation through hydraulic control, and the hydraulic system comprises an oil pump, a driving shaft and other components and provides control power for the normally-open clutch and the gearbox. The normally open clutch adopts a combined structure of an engine large flywheel and a friction plate, and the gearbox is meshed with a hydraulic piston linkage control gear through a gear shifting sliding block. In order to prevent misoperation in a decompression state, the system adopts a normally-open dry clutch design, and joint transmission can be performed when hydraulic pressure reaches a threshold value. Gear shifting control is achieved through two synchronous two-inlet eight-outlet hydraulic valve sets, and pressure of oil cavities on the two sides of a gear shifting sliding block is synchronously adjusted to drive displacement. The system has the advantages of being compact in structure and stable in gear shifting, supports a manual mechanical or electric control hydraulic valve set gear shifting mode, and meets the transmission requirements of various vehicles.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and more specifically, to a vehicle hydraulically controlled internal gear transmission system, which is applicable to various types of motor vehicles, including but not limited to passenger vehicles, commercial vehicles, electric vehicles, hybrid vehicles, etc. The transmission system is intended to provide a transmission solution with compact structure, high transmission efficiency, smooth gear shifting and rapid response, so as to optimize the performance and driving experience of the vehicle. Background Art

[0002] With the rapid development of the automobile industry, the vehicle transmission system is an important part of the automobile power transmission system. Its performance and technical level are directly related to the fuel economy, power, driving comfort and reliability of the automobile. The traditional vehicle transmission system has problems such as large size and complex structure. Therefore, developing a simple, efficient, reliable and easy-to-maintain vehicle transmission system has become an important research direction in the current automotive technology field. Summary of the invention

[0003] The present invention provides a vehicle speed change system solution for an internal meshing gear transmission transmission whose gear shifting is controlled by a hydraulic control system. To realize the function, the vehicle hydraulically controlled internal meshing speed change system comprises: 1. a hydraulic oil pump; 2. a hydraulic pump clutch active plate; 3. a hydraulic pump power take-off gear; 4. a hydraulic pump drive shaft; 5. a hydraulic pump clutch friction plate; 6. a hydraulic pump clutch pressure plate; 7. a hydraulic pump separation hydraulic chamber; 8. a hydraulic pump pressure plate pressure spring; 9. a hydraulic pump pressure adjustment bolt; 10. a clutch control valve return oil; 11. a clutch separation control valve; 12. a clutch high-pressure oil pipe; 13. a clutch hydraulic oil chamber; 14. a large engine flywheel; 15. a clutch separation spring; 16. a clutch friction plate; 17. a clutch pressure plate; 18. a clutch The clutch pressure plate hydraulic piston, 19, clutch bearing, 20, hydraulic oil filter, 21, shift hydraulic oil distribution valve group, 22, shift hydraulic oil unloading pipe, 23, shift hydraulic oil return pipe, 24, forward gear hydraulic oil pipe bundle, 25, reverse gear hydraulic oil pipe bundle, 26, shift slider, 27, shift hydraulic piston, 28, shift hydraulic manifold, 29, active shaft shift hydraulic oil pipe, 30, active shaft, 31, bearing, 32, shift piston baffle, 33, shift slider baffle, 34, gearbox input shaft, 35, output shaft shift hydraulic oil pipe, 36, gearbox output shaft, 37, forward gear hydraulic oil chamber, 38, reverse gear hydraulic oil chamber, 39, shift gear, 40, gearbox housing and other parts are composed, and the specific assembly structure is shown in the attached figure: Figure 1 :Structure diagram of hydraulically controlled internal gear transmission system for vehicles (neutral gear) Figure 2 :Structure diagram of hydraulically controlled internal gear transmission system for vehicles (first gear) Figure 3 : Schematic diagram of the shift slider Figure 4 : Schematic diagram of the shift piston Figure 5 : Shift gear diagram Figure 6 : Schematic diagram of the shift slider baffle Figure 7 : Schematic diagram of the driving shaft Figure 8 — Fig.17 Schematic diagram of hydraulic control on and off Depend on Figure 1 In: 1. Hydraulic oil pump, 2. Hydraulic pump clutch active plate, 3. Hydraulic pump power take-off gear, 4. Hydraulic pump drive shaft, 5. Hydraulic pump clutch friction plate, 6. Hydraulic pump clutch pressure plate, 7. Hydraulic pump separation hydraulic chamber, 8. Hydraulic pump pressure plate pressure spring, 9. Hydraulic pump pressure adjustment bolt, 10. Clutch control valve return oil pipe, 11. Clutch separation control valve, 12. Clutch high-pressure oil pipe, 13. Clutch hydraulic oil chamber, 20. Hydraulic oil filter, 21. Shift hydraulic oil distribution valve group, 22. Shift hydraulic oil unloading pipe, 23. Shift hydraulic oil supply pipe, 24. Forward hydraulic oil pipe bundle, 25. Reverse hydraulic oil pipe bundle, 28. Shift hydraulic manifold constitutes a hydraulic control system to realize: 14. Engine large flywheel, 15. Clutch release spring, 16. Clutch friction plate , 17, clutch pressure plate, 18, clutch pressure plate hydraulic piston, 19, clutch bearing composed of normally open clutch and composed of: 26, shift slider, 27, shift hydraulic piston, 28, shift hydraulic collector, 29, driving shaft shift hydraulic oil pipe, 30, driving shaft, 31, bearing, 32, shift piston baffle, 33, shift slider baffle, 34, gearbox input shaft, 35, output shaft shift hydraulic oil pipe, 36, gearbox output shaft, 37, forward gear hydraulic oil chamber, 38, reverse gear hydraulic oil chamber, 39, shift gear, 40, gearbox housing composed of internal meshing gear transmission, each working condition control, through hydraulic control 30, driving shaft and 36, output shaft 39, shift gear 33, shift slider left and right movement to achieve the connection and separation of power transmission between shaft and gear.

[0004] The attached figure shows a seven-forward gear and one-reverse gear transmission system, which is only used to illustrate the principle of this patent and does not limit the scope of application of the patent. In the structural diagram, 21, the shift hydraulic oil distribution valve group is composed of two groups of synchronously acting two-input and eight-output universal hydraulic valve groups, which synchronously control the same 26, both sides of the shift slider 37, the forward gear hydraulic oil chamber, 38, the reverse gear hydraulic oil chamber oil supply and unloading to achieve left and right displacement to achieve shifting. In order to ensure that the hydraulic system is completely depressurized after parking, 26, and the shift slider has an unexpected displacement, which may interfere with the operation of the gearbox and cause damage, the present invention adopts a normally open hydraulic control dry clutch structure, 11, and the clutch release control valve is a universal one-input and two-output hydraulic control valve. The clutch can only be combined with the valve group on and off principle under various transmission conditions after the hydraulic system pressure is boosted to the working pressure. See the attached figure. The internal meshing gear transmission system adopts the following Figure 3 , Figure 4 , Figure 5 The shift slider 26, the shift hydraulic piston 27, and the shift gear 39 complete axial movement under the control of the hydraulic system to form power transmission and separation between the driving shaft 30 and the output shaft of the gearbox 36 to achieve speed change. The working principles of each working condition are as follows: Start-up conditions: Figure 1 7. The hydraulic pump separation hydraulic chamber pressure is lower than the preset value due to shutdown reasons. 6. The hydraulic pump clutch pressure plate is pressed by 8. The hydraulic pump pressure plate pressure spring and 2. The hydraulic pump clutch active plate is pressed. 5. The hydraulic pump clutch friction plate realizes the engine through 3. The hydraulic pump power take-off gear, 4. The hydraulic pump drive shaft drags 1. The hydraulic oil pump starts to work to form the hydraulic system oil supply pressure. One of the two high-pressure hydraulic oils passes through 23. The shift hydraulic oil supply pipe, 21. The shift hydraulic oil distribution valve group (parking neutral position (such as Figure 8 )) 25. Shift down hydraulic oil pipe bundle, 28. Shift hydraulic manifold, enter each gear position of the gearbox 38. Shift down hydraulic oil chamber pushes 26. Shift slider to the shift position, and all gear positions are in neutral. The other way passes through 11. Clutch release control valve, 12. Clutch high-pressure oil pipe, 13. Clutch hydraulic oil chamber pushes 18. Clutch pressure plate hydraulic piston drives 17. Clutch pressure plate, 16. Clutch friction plate compresses 15. Clutch release spring and 14. Engine large flywheel rotate synchronously.

[0005] Gear shifting conditions: First, operate 11, the clutch release control valve to perform clutch release operation, the valve body is connected as follows Fig.17 As shown, 13. Clutch hydraulic oil chamber loses pressure 15. Clutch release spring pushes 16. Clutch friction plate and 14. Engine large flywheel separates, thereby cutting off the power connection between the engine and the gearbox to provide working conditions for shifting. After the clutch is separated, the operation 21. Shift hydraulic oil distribution valve group is transferred to the planned gear position, and the valve bodies of each gear position are connected as shown in the figure. Fig. 9 — Fig.16 As shown, the hydraulic system supplies oil to the pre-selected gear 37, the gear shift hydraulic oil chamber pushes the gear 26, the shift slider is actuated to achieve 39, the shift gear is connected with 30, the driving shaft or 36, the gearbox output shaft to form a power transmission path to complete the gear shift, and after the gear shift is completed, the clutch engagement action is restored to realize the power output of the engine to the wheels through the transmission system.

[0006] Back-off condition: First, operate 11, the clutch release control valve to perform clutch release operation, the valve body is connected as follows Fig.17 As shown, 13. Clutch hydraulic oil chamber loses pressure 15. Clutch release spring pushes 16. Clutch friction plate and 14. Engine large flywheel are separated, thereby cutting off the power connection between the engine and the gearbox to provide working conditions for shifting. After the clutch is separated, operate 21. Shift hydraulic oil distribution valve group to neutral position, and the valve body is connected as shown in the figure. Figure 8 As shown, the hydraulic system supplies oil to the gear in use 38, the shift hydraulic oil chamber pushes the gear 26, the shift slider is actuated 39, the shift gear is separated from 30, the driving shaft or 36, the gearbox output shaft to form a power transmission path that is cut off to complete the gear shift, and after the gear shift is completed, the clutch is restored to engage to provide conditions for the next operation of the vehicle.

[0007] Hydraulic system pressure stabilization: like Figure 1 , Figure 2 The oil supply of the hydraulic control system shown is provided by a hydraulic pump composed of 1, hydraulic oil pump, 2, hydraulic pump clutch active plate, 3, hydraulic pump power take-off gear, 4, hydraulic pump drive shaft, 5, hydraulic pump clutch friction plate, 6, hydraulic pump clutch pressure plate, 7, hydraulic pump separation hydraulic chamber, 8, hydraulic pump pressure plate pressure spring, 9, hydraulic pump pressure adjusting bolt and other components. The hydraulic pump is driven by the engine. When the system is in a depressurized condition, 7, the hydraulic pump separation hydraulic chamber loses pressure, and 8, the hydraulic pump pressure plate pressure spring pushes 6, the hydraulic pump clutch pressure plate to press 5, the hydraulic pump clutch friction plate and 2, the hydraulic pump clutch active plate through 3, the hydraulic pump power take-off gear, and 4, the hydraulic pump drive shaft to realize the engine-driven hydraulic pump working pressure boost. When the pressure is higher than the set value, the oil in the 7, hydraulic pump separation hydraulic chamber pushes 6, the hydraulic pump clutch pressure plate to overcome 8, the hydraulic pump pressure plate pressure spring to make a reverse movement to realize the power cut-off from the engine to the hydraulic pump. The preset value of the hydraulic control system pressure is adjusted by adjusting the parameters of 9, the hydraulic pump pressure adjusting bolt.

[0008] All hydraulic valve groups of the present invention can adopt manual mechanical structures or electronically controlled valve groups. The mechanical valve group is used for manual speed change system, while the electronically controlled valve body combined with the driving computer can realize automatic speed change system.

Claims

1. A vehicle hydraulically controlled internal gear transmission system composed of a hydraulic pump, a hydraulic pump clutch, a hydraulic shift valve group, a hydraulic pressure stabilizing control mechanism, a normally open clutch mechanism and a vehicle internal gear transmission mechanism as described in the specification.

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