WO2002035110A1

WO2002035110A1 - Vehicular clutch of pumping type

Info

Publication number: WO2002035110A1
Application number: PCT/CN2001/001473
Authority: WO
Inventors: Yue Li
Original assignee: Yue Li
Priority date: 2000-10-26
Filing date: 2001-10-09
Publication date: 2002-05-02
Also published as: CN2442030Y; AU2002220462A1

Abstract

The present invention relates to a vehicular clutch of pumping type. Its substantial features include a gear-pump attached to flywheel of engine, inside which housing there are a gear set of internal toothing, upper and lower crescent-shaped blocks located in the space opposite to the engagement of two gears of said gear set, centrifugal control valve, shutoff valve, pressure-building block and a return spring provided on said lower crescent-shaped block. The clutch operates smoothly, and do not generate any relative abrasion, can improve the transmission efficiency and fuel-consumption etc.

Description

TECHNICAL FIELD The present invention relates to an automobile, and is a vehicle clutch. BACKGROUND OF THE INVENTION Existing automobiles have a separate product, which is arranged between the engine and the transmission. When the speed of the vehicle is to be changed, the clutch must be operated to disengage the transmission from contact with the engine before the transmission can be shifted. Existing automobile clutches generally have the following types, one is a gear clutch, the other is a friction clutch, and there are a hydraulic coupling and a torque converter. Among them, the gear clutch is only suitable for synchronous transmission with a rotation speed of OO-I SO rpm. Although the friction clutch is suitable for high speed, it is easy to slip and burn, and has a large structure and a large automatic control torque. Hydraulic couplers and torque converters are extremely inefficient at low speeds. SUMMARY OF THE INVENTION The object of the present invention is to provide a pump-type clutch for a vehicle, which uses hydraulic pressure to achieve the separation between the engine and the transmission of the vehicle, and the torque and speed of the transmission can be adjusted arbitrarily.

Gear pumps are widely used in hydraulic systems. The general structure of a gear pump is that a pair of meshed gears are installed in the pump casing, and the two sides of the gear are closed with end caps. The casing, the end caps and the interdental grooves of the gears form a number of sealed working chambers. When the gear rotates in a certain direction, oil is sucked on one side and oil is pressed on the other side to realize the circulating transmission of liquid oil. Therefore, the oil suction region and the oil pressure region of the gear pump are separated by the gears and the end cover of the pump casing 芡 engaged with each other. Average In terms of gear pumps, they can be used for liquid pressure boosting and conveying. They can also use pressure oil to push the gears to rotate, so that they can output a certain torque and speed on the output shaft. This is generally called a hydraulic motor. From the above, the rotating part of the gear pump is only gears that mesh with each other, and the pump casing (or pump body) is fixed. The technical idea of the present invention is to change the gear pump to a working state so that the pump casing also rotates. At this time, if the oil outlet of the gear pump is blocked, the gear cannot rotate and can only rotate with the pump body. It can realize the combination of clutches; otherwise it can realize the release of clutches. The specific structure of the present invention for achieving the above-mentioned object is that a gear pump is housed, and a pair of meshing gears are arranged in the pump casing. In the present invention, the pump casing is fixed on the engine flywheel, and an oil storage chamber is also provided on the wall thickness of the pump casing. The meshing gear provided in the pump according to the present invention may be one of an internal ring gear and the other of a cylindrical gear. In this way, the gear pump casing will rotate with the engine, and the spur gear with the output shaft can be turned and not turned. In addition, in the present invention, two crescent blocks are provided between the gaps at the opposite ends of the two gear toothed portions, and the outer sides of the two crescent blocks are respectively in close contact with the cylindrical gear and the internal gear, and a passage is formed between the inner sides. At the same time, in order to enable the automatic separating action between the pump casing and the gear, the present invention also includes a centrifugal control valve, a shut-off valve, a pressure block and a return spring provided on the lower crescent block; An oil passage is opened on the valve, and an oil passage which can communicate with the upper oil passage of the centrifugal control valve is opened on the lower crescent block. The centrifugal control valve is slidably arranged on the upper edge of the lower crescent block, and a return spring is placed on the bottom of the centrifugal control valve. The pressure building block is set on the left side of the centrifugal control valve, the cut-off valve is set on the right side of the control valve, and a return spring is placed on top of it.

In the present invention, the meshing gear installed in the pump casing may be an internal meshing gear, or an external meshing gear, or may be composed of a blade and a rotor.

As described above, the present invention works as follows: After the engine is started, at the set speed, the centrifugal force of the centrifugal control valve on the lower crescent block is less than the set pressure of the return spring, and the drain port cannot be opened to the shut-off valve. The oil circuit, the pressure building block cannot be opened under the control of the centrifugal valve, so the pressure cannot be established, and the shut-off valve remains under the action of the return spring. In the chute of the crescent block, the oil passage inside the crescent block is still conducting, and the gear pump is short-circuited. At this time, the outer ring gear rotates with the pump housing around the cylindrical gear, and the cylindrical gear does not rotate, and the separator is separated. status. When the engine speed is higher than the set speed, the centrifugal control valve compresses the return spring under the push of centrifugal force. The centrifugal control valve moves down to open the pressure block and the oil passage that blocks the shut-off valve. Turn over to block a part of the oil passage inside the crescent block, build pressure before building the pressure block, push the shut-off valve to compress the return spring on top of it, load off the oil passage inside the crescent block, and achieve stall. Complete the combination. When the accelerator pedal is released, the engine decelerates. When the speed of the engine is lower than the speed of the spur gear, the spur gear of the gear pump rotates in a reverse direction relative to the pump casing, the oil inlet becomes the oil outlet, and the oil compartment of the shut-off valve is cut off. Under negative pressure, the centrifugal force of the shut-off valve and the action of the return spring open the oil passage on the inner side of the crescent block, and the clutch is released.

The advantage of the invention is that the clutch runs smoothly, there is no relative wear during the coupling process, and the transmission efficiency is high; due to the unidirectional nature of the clutch, the defect that the engine still runs in gear when the vehicle is coasting can be avoided, Save oil. Brief Description of the Drawings Fig. 1 is a schematic side sectional view of the present invention.

Fig. 2 is a sectional view taken along the line A-A shown in Fig. 1.

FIG. 3 is an enlarged view of part B in FIG. 2.

Practical Examples of the Invention Embodiments of the present invention are shown in the drawings. The invention will be described in detail below with reference to the drawings.

Please refer to Figure 1 first. From Figure 1, the present invention has a gear pump, the gear pump The pump casing is fixed on the flywheel of the automobile engine. An oil storage chamber 2 is also provided on the wall thickness of the pump 売 1. In the present example, a pair of gear sets interlocked by the internal gear 3 and the cylindrical gear 4 are installed in the dry pump casing 1, and the upper and lower two are provided between the gaps at the opposite ends of the meshing portion of the internal gear 3 and the cylindrical gear 4. The crescent blocks 7 and 9 are located on the outer side of the two crescent blocks 7 and 9 respectively, and the cylindrical gear 4 and the ring gear 3 are respectively in contact with each other, and a channel 8 is formed between the inner sides. From FIG. ¾, in this embodiment, oil passages 5, 6, and 1 1 are opened on the pump cover 10, which can communicate with the oil storage chamber 2 on the pump casing 1 and the oil inlet chamber of the internal gear chamber of the pump 売 1. A plug 1 2 is provided at the end in contact with the atmosphere at 5, 6 and 1 1. Please refer to FIG. 2 and FIG. 3 at the same time. The present invention also includes a centrifugal control valve 1 located on the lower crescent block 9, a shut-off valve 1 3, a pressure building block 16, and a centrifugal control valve return spring 1 5 . It can be clearly seen from FIG. 3 that an oil passage is opened on the centrifugal control valve 14 and an oil passage 17 is opened on the lower crescent block 9 and can communicate with the upper oil passage of the centrifugal control valve 14; the centrifugal control valve 14 slides It is set on the upper edge of the lower crescent block 9 and a return spring 15 is placed on the bottom of the crescent block 9; the pressure block 16 is set on the left side of the centrifugal control valve 1 4 and the cut-off valve 1 3 is set on the right side of the centrifugal control valve Its bottom is the lower oil chamber 20, and a return spring 18 is placed on top of it. In order to reduce the displacement resistance of the shut-off valve 1 3, a ball 19 is provided on one side edge of the shut-off valve 13.

The meshing member provided in the pump casing 1 of the present invention may be designed as another embodiment by using an external meshing gear or a combination of a blade and a rotor in addition to the internal meshing gear described in the above embodiment. When these embodiments are used to make another embodiment, except that the engaging member and its related structure are slightly changed, the others are basically the same as the above embodiment, so they will not be described again.

Claims

Request for Rights

1. A pump-type separator for a vehicle, comprising a gear pump, and a pair of meshing gears are arranged in a pump casing, which are characterized in that:

A. The pump casing is fixed on the engine flywheel. One of the gears is an internal gear and the other is a cylindrical gear. The upper and lower crescent blocks and two crescent blocks are provided between the gaps at the opposite ends of the two gear meshing parts. The outer sides are respectively close to the cylindrical gear and the inner tooth cymbals, and a passage is formed between the inner cymbals;

B. It also includes a centrifugal control valve, a shut-off valve, a pressure block and a return spring, which are arranged on the lower crescent block. An oil passage is opened on the centrifugal control valve, and a centrifugal valve is opened on the lower crescent block. An oil passage communicating with the oil passage on the control valve; the centrifugal control valve is slidingly arranged on the upper edge of the lower crescent block, and a return spring is placed on the bottom of the control valve. The right side of the control valve is topped with a return spring.

C. The pump cover is provided with an oil passage which can communicate with the oil storage chamber on the pump casing and the oil inlet chamber of the gear chamber in the pump casing.

2. The pump-type clutch for a vehicle according to claim 1, characterized in that: the meshing gear installed in the pump casing may be an internal meshing gear, or an external meshing gear or a blade and a rotor. .