Clutch driving mechanism of electrically-driven hydraulic gearbox

Abstract

The utility model discloses an electric drive hydraulic transmission clutch driving mechanism which comprises a driving motor and an oil cylinder assembly, the oil cylinder assembly comprises a cylinder body and a piston with a piston rod, the piston rod is of a lead screw structure, a lead screw nut is sleeved on the piston rod, the lead screw nut is fixedly connected with a nut shaft, and the nut shaft is fixedly connected with the cylinder body. The nut shaft is in transmission connection with a rotor of the driving motor; an oil inlet and an oil outlet are formed in the cylinder body, the oil inlet is connected with a one-way valve, and the oil inlet is communicated with a gearbox oil pool; the oil outlet is connected with a gearbox clutch hydraulic unit; a position sensor is arranged on the oil cylinder; a pressure sensor used for detecting the pressure of an oil way is arranged on the oil way between the oil outlet and the gearbox clutch hydraulic unit. The position sensor and the pressure sensor are both connected with the control module. According to the utility model, the motor is used for replacing the process of stepping on the clutch, and the sensor and the control module are used for replacing the decision-making process of people, so that automatic clutch is realized.

Description

Technical Field

[0001] The utility model relates to a clutch driving mechanism of an electric drive hydraulic transmission. Background Art

[0002] At present, as a key technology and research direction of intelligent vehicles, driverless has attracted great attention at home and abroad, and certain research results have been achieved. For driverless vehicles, realizing the automatic control of the clutch action is an important condition for the normal driving of driverless vehicles. Content of the Utility Model

[0003] In view of the above problems, the utility model provides a new clutch driving mechanism of an electric drive hydraulic transmission to realize the automatic control of the clutch action.

[0004] The clutch driving mechanism of the electric drive hydraulic transmission is characterized by comprising a driving motor and an oil cylinder assembly. The oil cylinder assembly comprises a cylinder body and a piston with a piston rod. The piston rod is of a lead screw structure, and a lead screw nut is sleeved on the piston rod. The lead screw nut is fixedly connected with a nut shaft, and the nut shaft is in transmission connection with the rotor of the driving motor. An oil inlet and an oil outlet are arranged on the cylinder body. The oil inlet is connected with a one-way valve and communicated with a gearbox oil sump. The oil outlet is connected with a gearbox clutch hydraulic unit. A position sensor for detecting the position of the piston is arranged on the cylinder body. A pressure sensor for detecting the oil circuit pressure is arranged on the oil circuit between the oil outlet and the gearbox clutch hydraulic unit. The position sensor and the pressure sensor are both connected with a control module.

[0005] Preferably, the nut shaft is arranged on a bearing.

[0006] When the piston moves to the position sensor, the position sensor transmits a signal to the control unit, and the driving motor stops working.

[0007] When the pressure value detected by the pressure sensor reaches a predetermined value, the clutch is engaged. The pressure sensor transmits a signal to the control unit, and the driving motor stops rotating forward. Similarly, when the pressure value detected by the pressure sensor reaches another predetermined value, the clutch is disengaged. The pressure sensor transmits a signal to the control unit, and the driving motor stops rotating backward.

[0008] Advantages of the Utility Model

[0009] 1. In the utility model, the process of a human foot stepping on the clutch is replaced by a driving motor, and the decision-making process of a human is replaced by sensors and a control module to realize automatic clutch operation.

[0010] 2. The oil inlet of the utility model is communicated with the gearbox oil sump, and the oil returns from the gearbox, reducing the energy storage mechanism in the circuit and reducing the maintenance object.

[0011] 3. By means of a position sensor, the extreme positions of the piston are ensured to avoid the oil cylinder piston moving to the extreme positions, reducing potential safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the clutch drive mechanism of an electric drive hydraulic transmission.

[0013] Figure 2 It is a partial cross-sectional view of the clutch drive mechanism of an electric drive hydraulic transmission.

[0014] Figure 3 It is a schematic diagram of the working principle of the present invention.

[0015] Drive motor - 1, oil cylinder assembly - 2, position sensor - 3, pressure sensor - 4, oil outlet - 5, check valve - 6, oil inlet - 7, piston - 8, lead screw nut - 9, bearing - 10, nut shaft - 11, cylinder block - 12, transmission clutch hydraulic unit - 13, transmission oil sump - 14, piston rod - 15 DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The technical solutions of the present invention will be described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments; and the structures shown in the drawings are only schematic and do not represent actual objects. It should be noted that based on these embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0017] It should be noted that in this text, the term "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of additional identical or equivalent elements in the process, method, article or device comprising the said element.

[0018] The terms "upper", "lower", "inner", "outer", etc. do not constitute an absolute spatial relationship limitation, but only a concept of relative position. This is understandable to those skilled in the art.

[0019] See Figure 1 、 2 And 3, the clutch drive mechanism of the electric drive hydraulic transmission includes a drive motor 1 and an oil cylinder assembly 2.

[0020] The driving motor 1 is a brushless motor, which can accurately control the rotation of the motor, thereby accurately controlling the movement of the clutch push rod, and the entire movement process can be controlled in real time.

[0021] The cylinder assembly 2 includes a cylinder body 12 and a piston 8 with a piston rod. The piston 8 can move left and right along the cylinder body 12. The piston rod 15 is a screw structure, on which a screw nut 9 is mounted. The screw nut 9 is fixedly connected to a nut shaft 11, and the nut shaft 11 is transmission-connected to the rotor of the drive motor 1; the nut shaft 11 is arranged on a bearing 10.

[0022] The cylinder body 12 is provided with an oil inlet 7 and an oil outlet 5 , and the oil inlet 7 is connected to a one-way valve 6 . The oil inlet 7 is communicated with a transmission oil pool 14 ; the oil outlet 5 is connected to a transmission clutch hydraulic unit 13 .

[0023] A position sensor 3 for detecting the piston position is provided on the cylinder body 12; a pressure sensor 4 for detecting the oil circuit pressure is provided on the oil circuit between the oil outlet 5 and the transmission clutch hydraulic unit 13; the position sensor 3 and the pressure sensor 4 are both connected to the control module.

[0024] When the piston 8 moves to the position sensor 3 , the position sensor 3 sends a signal to the control unit, and the drive motor 1 stops working.

[0025] When the pressure value detected by the pressure sensor 4 reaches a predetermined value, the clutch is engaged, the pressure sensor sends a signal to the control unit, and the drive motor stops rotating in the forward direction. Similarly, when the pressure value detected by the pressure sensor reaches another predetermined value, the clutch is disengaged, the pressure sensor sends a signal to the control unit, and the drive motor stops rotating in the reverse direction.

[0026] The utility model supplies oil to the gearbox hydraulic system, pushes the hydraulic cylinder piston through the forward and reverse rotation of the motor, thereby controlling the gearbox clutch hydraulic system circuit pressure, thereby achieving clutch engagement and disengagement. The motor drive is controlled by the pressure sensor, and combined with the motor speed control, the actual state of the hydraulic system is effectively verified.

[0027] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. Electric drive hydraulic transmission clutch drive mechanism, characterized in that: It includes a driving motor and a cylinder assembly, wherein the cylinder assembly includes a cylinder body, a piston with a piston rod, the piston rod is a screw structure, a screw nut is mounted thereon, the screw nut is fixedly connected to a nut shaft, and the nut shaft is drivingly connected to the rotor of the driving motor; an oil inlet and an oil outlet are arranged on the cylinder body, and the oil inlet is connected to a one-way valve, and the oil inlet is communicated with a gearbox oil pool; the oil outlet is connected to a gearbox clutch hydraulic unit; a position sensor for detecting the position of the piston is arranged on the cylinder body; a pressure sensor for detecting the oil circuit pressure is arranged on the oil circuit between the oil outlet and the gearbox clutch hydraulic unit; the position sensor and the pressure sensor are both connected to a control module.

2. The electric-driven hydraulic transmission clutch drive mechanism according to claim 1, characterized in that: The nut shaft is arranged on the bearing.

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