Rigid torque-continuously variable transmission

Abstract

The invention discloses a rigid torque-continuously variable transmission, belonging to the technical field of transmissions. It comprises a housing, an input shaft, an output shaft, a transmission frame, a transmission gear, a locking gear pump, a centrifugal hammer and a first gear; the input shaft and the output shaft are coaxially arranged, the input shaft and the output shaft both pass through the center of the transmission frame in sequence, and are both rotatably connected with the transmission frame, the input shaft and the output shaft are respectively sleeved with a second gear and a third gear, the second gear and the third gear are both meshed with the transmission gear, and the transmission gear is rotatably connected with the transmission frame through a rotating shaft. The invention completely abandons the disadvantages of friction transmission, and uses hydraulic self-controlled rigid stepless torque conversion, with almost no friction wearing parts, and the transmission is locked at medium and high speeds, and there is no wear. The transmission also has the characteristics of simple structure, small size, low cost, long life, no complex electronic control system, etc., especially can realize the rigid torque conversion transmission of manual gear, and can also realize the stepless and smooth speed change of CVT.

Description

Technical Field

[0001] The invention relates to a rigid torque-continuously variable transmission, belonging to the technical field of transmissions. Background Art

[0002] At present, the internationally used transmissions include manual transmission, dual-clutch automatic transmission, AT automatic transmission and CVT continuously variable transmission. Manual transmission is cumbersome and tiring to operate; dual-clutch transmission generates heat and jerk, and has a complex structure and high cost; AT automatic transmission has problems such as large transmission loss, high fuel consumption, untimely power and jerk, and has a complex structure and high cost; CVT has the inherent defects of limited torque peak and weak starting. For this reason, the present invention proposes a rigid torque-continuously variable transmission that has both the rigid torque-converting transmission of manual transmission and the stepless and smooth speed change of CVT. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a rigid torque-continuously variable transmission, which solves the problems of easy wear, limited torque peak value and high cost of traditional transmissions.

[0004] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions:

[0005] A rigid torque-continuously variable transmission, comprising a housing, an input shaft, an output shaft, a transmission frame, a transmission gear, a locking gear pump, a centrifugal hammer and a first gear;

[0006] The input shaft and the output shaft are coaxially arranged, the input shaft and the output shaft both pass through the center of the transmission frame in sequence, and are both rotatably connected to the transmission frame, the input shaft and the output shaft are respectively sleeved with a second gear and a third gear, the second gear and the third gear are both meshed with the transmission gear, the transmission gear is rotatably connected to the transmission frame through a rotating shaft, and is used for torque transmission between the input shaft and the output shaft;

[0007] The locking gear pump is fixedly connected to the transmission frame, one of the rotating shafts of the locking gear pump extends to the outside of the transmission frame, and the rotating shaft is meshed with the first gear through the fourth gear, and the first gear is fixedly sleeved with the input shaft to drive the locking gear pump to pump oil;

[0008] The centrifugal hammer is arranged at the oil outlet of the locking gear pump and is used to control the closing degree of the oil outlet valve of the locking gear pump.

[0009] As a preferred example, the second gear and the speed gear are meshed at a gear ratio of A:B, and the speed gear and the third gear are meshed at a gear ratio of C:D, wherein the A value is smaller than the B value, and the C value is smaller than the D value.

[0010] As a preferred example, at least three speed change gears and locking gear pumps are provided.

[0011] As a preferred example, three speed change gears and three locking gear pumps are provided, and the speed change gears and the locking gear pumps are arranged alternately in sequence around the input shaft.

[0012] As a preferred example, the input shaft and the output shaft are coaxially rotatably connected via a bearing.

[0013] As a preferred example, the direction in which the centrifugal hammer closes the oil outlet valve is the direction of the centrifugal force of the transmission frame.

[0014] As a preferred example, the centrifugal hammer is also provided with a torsion spring for resetting.

[0015] As a preferred example, the input shaft and the output shaft are both rotatably connected to the housing, and a rotating seal is provided at the rotational connection between the input shaft and the output shaft.

[0016] The beneficial effects of the present invention are as follows: the present invention completely abandons the disadvantages of friction transmission, and uses hydraulic self-controlled rigid stepless torque conversion, with almost no friction wearing parts, and the transmission is locked at medium and high speeds, and there is no friction. The transmission also has the characteristics of simple structure, small size, low cost, long life, and no complex electronic control system. In particular, it can realize the rigid torque conversion transmission of manual gear, and can also realize the stepless and smooth speed change of CVT. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 for Figure 1 AA cross-sectional diagram;

[0019] Figure 3 for Figure 1 BB-direction cross-sectional diagram;

[0020] Figure 4 for Figure 1 Schematic diagram of CC section.

[0021] In the figure: housing 1, input shaft 2, second gear 3, first gear 4, fourth gear 5, locking gear pump 6, oil outlet valve 7, speed change frame 8, third gear 9, output shaft 10, speed change gear 11, centrifugal hammer 12. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0023] like Figure 1-4As shown, the rigid torque continuously variable transmission comprises a housing 1, an input shaft 2, an output shaft 10, a transmission frame 8, a transmission gear 11, a locking gear pump 6, a centrifugal hammer 12 and a first gear 4;

[0024] The input shaft 2 and the output shaft 10 are coaxially arranged, and the input shaft 2 and the output shaft 10 both pass through the center of the transmission frame 8 in sequence, and are both rotatably connected to the transmission frame 8. The second gear 3 and the third gear 9 are respectively sleeved on the input shaft 2 and the output shaft 10. The speed gear 11 includes two groups of gears with different diameters and numbers of teeth. The two groups of gears are integrally arranged and coaxially arranged, and are respectively meshed with the second gear 3 and the third gear 9. The speed gear 11 is rotatably connected to the transmission frame 8 through a rotating shaft, and is used for torque transmission between the input shaft 2 and the output shaft 10;

[0025] The locking gear pump 6 includes a pump cylinder and two meshing gears, and delivers oil by changing the working volume of the two meshing gears. The pump cylinder is installed on the transmission frame 8, and a clearance groove is provided at the bottom of the pump cylinder. The oil outlet and the oil inlet of the pump cylinder are both arranged in the clearance groove, so that the pump cylinder can be closely arranged in the transmission frame 8 to reduce the volume of the transmission frame 8.

[0026] The top cover of the pump cylinder replaces a portion of the top surface of the transmission frame 8, so that the length of the rotating shaft extending from the locking gear pump 6 is shortened to increase the bending strength of the rotating shaft. The rotating shaft of the locking gear pump 6 extends to the outside of the transmission frame 8, and the rotating shaft is meshed with the first gear 4 through the fourth gear 5. The first gear 4 is fixedly sleeved with the input shaft 2 to drive the locking gear pump 6 to pump oil.

[0027] The centrifugal hammer 12 is arranged at the oil outlet of the locking gear pump 6, and is used to control the closing degree of the oil outlet valve 7 of the locking gear pump. The oil outlet valve 7 should be set as a one-way valve, which only allows entry but not exit. When the output oil 10 is greater than the input shaft 2 at idle speed during high-speed gliding, it plays a locking role.

[0028] The second gear 3 and the speed gear 11 are meshed at a gear ratio of A:B, and the speed gear 11 and the third gear 9 are meshed at a gear ratio of C:D, wherein the value of A is less than the value of B, and the value of C is less than the value of D. In this embodiment, taking the application in a small car as an example, if the number of teeth A is set to 10, the number of teeth B is set to 20, the number of teeth C is set to 12, and the number of teeth D is set to 18, the speed ratio of the second gear 3 and the speed gear 11 is 2:1, and the speed ratio of the speed gear 11 and the second gear 9 is 3:2, then the transmission ratio of the input shaft 2 and the output shaft 10 is 3:1;

[0029] Taking the application in large heavy-load vehicles as an example, if the number of teeth A is set to 10, the number of teeth B is set to 20, the number of teeth C is set to 10, and the number of teeth D is set to 30, the speed ratio of the second gear 3 and the speed gear 11 is 2:1, and the speed ratio of the speed gear 11 and the second gear 9 is 3:1. At this time, the speed ratio of the input shaft 2 and the output shaft 10 is 6:1, which greatly enhances the torque and is suitable for large-load and heavy-load vehicles.

[0030] In order to maintain the stability and dynamic balance of the transmission, at least three speed gears 11 and locking gear pumps 6 are provided. In general small vehicles, three speed gears 11 and locking gear pumps 6 are provided, and the speed gears 11 and locking gear pumps 6 are arranged alternately around the input shaft 2 in sequence, and the structural strength is sufficient to transmit the torque of the input shaft 2; when used on large heavy-duty vehicles, four or five speed gears 11 and locking gear pumps 6 can be provided, and the speed gears 11 and locking gear pumps 6 are also arranged alternately around the input shaft 2 in sequence, and the upper limit of torque transmission is enhanced by setting more parts.

[0031] The input shaft 2 and the output shaft 10 are connected to rotate coaxially via bearings, ensuring that the input shaft 2 and the output shaft 10 are always in a coaxial state when in use, further enhancing the stability of torque transmission.

[0032] The direction in which the centrifugal hammer 12 closes the oil outlet valve 7 is the direction of the centrifugal force of the gear frame 8. As the speed of the gear frame 8 continues to increase, the centrifugal hammer 12 rotates with the rotation of the gear frame 8, and the hammer head part is acted upon by the centrifugal force to drive the oil outlet valve 7 to move, gradually closing the oil outlet on the locking gear pump 6. The hammer handle part of the centrifugal hammer 12 is also provided with a torsion spring for resetting, which is used to reset the centrifugal hammer 12 at low speed.

[0033] The input shaft 2 and the output shaft 10 are both rotatably connected to the housing 1, and the rotational connections of the input shaft 2 and the output shaft 10 are both provided with rotating seals. The transmission frame 8 is provided as a closed container, and the oil is completely filled in the transmission frame 8. The housing 1 is wrapped in the transmission frame 8, which enables the transmission frame 8 to rotate stably on the one hand, and ensures the sealing of the oil to prevent leakage on the other hand.

[0034] Working principle: When the clutch links the input shaft 2 to intervene with power, the vehicle is driven to start from a stationary state and accelerate to a stable operation. In this process, the acceleration can be divided into two parts. One is the acceleration through the meshing transmission between the input shaft 2, the speed gear 11, and the output shaft 10. The other is the flexible acceleration through the speed frame 8 and the locking gear pump 6. At the beginning of the start, the initial state of the oil outlet of the locking gear pump 6 is a partially open state, and a certain pressure is maintained at the oil outlet valve 7, so that the transmission frame 8 stably follows the rotation of the third gear 9, and the output shaft 10 is accelerated entirely by the meshing transmission of the speed gear 11. At this time, the transmission ratio between the input shaft 2 and the output shaft 10 is determined by the gear ratio between the speed gear 11, the second gear 3 and the third gear 9; as the vehicle speed continues to increase, the oil outlet valve 7 of the locking gear pump 6 is gradually closed under the drive of the centrifugal hammer 12, and the pumping pressure of the oil (i.e., the locking force) becomes larger and larger, until the locking gear pump 6 is in a stopped and locked state due to excessive oil pressure. At this time, the input shaft 2 is locked at the same speed with the transmission frame 8 through the first gear 4 and the locking gear pump 6, and the transmission frame 8 is locked at the same speed with the output shaft 10 through the speed gear 11, so that the input shaft 2 and the output shaft 10 reach a speed ratio of 1:1, completing the stepless speed change process.

[0035] In addition to the acceleration function, the main function of the transmission frame 8 during the entire speed change process is to act as a torque change acceleration platform that increases synchronously with the increase in the speed of the output shaft 10, so that the vehicle can always accelerate with a rigid torque change of the instant input shaft 2 speed minus the output shaft 10 speed multiplied by the speed ratio. This rigid torque change acceleration becomes smaller and smaller as the input shaft 2 and the output shaft 10 tend to be at the same speed. When the output shaft 10 and the input shaft 2 are at the same speed, the torque change acceleration ends. In this process, as the speed of the transmission frame 8 increases, the centrifugal hammer 12 gradually drives the oil outlet valve 7 to close, and the locking force of the locking gear pump 6 increases as the oil pressure continues to increase. Combined with the torque of the transmission frame 8, the input shaft 2 and the transmission frame 8 are finally locked at the same speed, and the transmission frame 8 and the output shaft 10 are locked at the same speed, completing the entire rigid stepless speed change process.

[0036] The torque limit of the speed change can be obtained by expanding the system strength.

[0037] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. Rigid torque continuously variable transmission, characterized in that: It comprises a housing (1), an input shaft (2), an output shaft (10), a transmission frame (8), a transmission gear (11), a locking gear pump (6), a centrifugal hammer (12) and a first gear (4); The input shaft (2) and the output shaft (10) are coaxially arranged, the input shaft (2) and the output shaft (10) both pass through the center of the transmission frame (8) in sequence, and are both rotatably connected to the transmission frame (8), the input shaft (2) and the output shaft (10) are respectively sleeved with a second gear (3) and a third gear (9), the second gear (3) and the third gear (9) are both meshed with a transmission gear (11), and the transmission gear (11) is rotatably connected to the transmission frame (8) via a rotating shaft, and is used for torque transmission between the input shaft (2) and the output shaft (10); The locking gear pump (6) is fixedly connected to the transmission frame (8), one of the rotating shafts of the locking gear pump (6) extends to the outside of the transmission frame (8), and the rotating shaft is meshed with the first gear (4) through the fourth gear (5), and the first gear (4) is fixedly sleeved with the input shaft (2) for driving the locking gear pump (6) to pump oil; The centrifugal hammer (12) is arranged at the oil outlet of the locking gear pump (6) and is used to control the closing degree of the oil outlet valve (7) of the locking gear pump.

2. The rigid torque continuously variable transmission according to claim 1, characterized in that: The second gear (3) and the speed gear (11) are meshed at a gear ratio of A:B, and the speed gear (11) and the third gear (9) are meshed at a gear ratio of C:D, wherein the A value is smaller than the B value, and the C value is smaller than the D value.

3. The rigid torque continuously variable transmission according to claim 1, characterized in that: At least three of the speed change gears (11) and the locking gear pump (6) are provided.

4. The rigid torque continuously variable transmission according to claim 3, characterized in that: The speed change gear (11) and the locking gear pump (6) are each provided in three numbers, and the speed change gear (11) and the locking gear pump (6) are arranged alternately in sequence around the input shaft (2).

5. The rigid torque continuously variable transmission according to claim 1, characterized in that: The input shaft (2) and the output shaft (10) are coaxially rotatably connected via a bearing.

6. The rigid torque continuously variable transmission according to claim 1, characterized in that: The direction in which the centrifugal hammer (12) closes the oil outlet valve (7) is the direction of the centrifugal force of the transmission frame (8).

7. The rigid torque continuously variable transmission according to claim 6, characterized in that: The centrifugal hammer (12) is also provided with a torsion spring for resetting.

8. The rigid torque continuously variable transmission according to claim 1, characterized in that: The input shaft (2) and the output shaft (10) are both rotatably connected to the housing (1), and a rotating seal is provided at the rotational connection between the input shaft (2) and the output shaft (10).

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