CN100371618C - Automatic controller for vehicle clutch - Google Patents

Abstract

The present invention relates to an automatic controller of a vehicle clutch, especially a controller of a dry clutch of a vehicle mounted with an electric-control mechanical automatic speed changer or an automatic clutch type hand-operated speed changer. The present invention is driven by a motor, a master cylinder piston of a clutch is pushed by a feed screw nut to make an axial movement, and the oil in a master cylinder is pressurized to push a working cylinder of the clutch to operate; a clutch release bearing is pushed by a piston of the working cylinder of the clutch to overcome the spring force of a clutch film sheet for disengaging or engaging the clutch; a power-assisted spring mechanism is adopted to partially balance the hydraulic pressure in the master cylinder of the clutch generated by the action of the spring force of the clutch film sheet, and the needed torque for pushing the master cylinder piston of the clutch is reduced largely. The present invention realizes the control of the disengaging and the engaging speeds of the clutch through the control on the speed and the rotary direction of the motor. The present invention has simple structure and reliable control.

Description

Motor-driven dry clutch hydrostatic drive device

Technical field:

The present invention relates to the control gear of vehicular clutch, be specifically related to the control gear of dry clutch in a kind of vehicle of equipping electric-controlled mechanical automatic speed transmission or automatic clutch formula manual transmission.

Background technique:

Electronic controlling mechanical type automatic speed changing is different from traditional hydraulic machine automatic speed changing, it is a kind of new vehicle automatic transmission mode, this automatic speed changing mode is on the basis of former armstrong's patent speed changer and dry friction clutch, cancelled clutch pedal, increase is by the actuator of electronic controller controls, realize the automatic control of shifting of transmission, clutch separation combination and engine speed, make it become the automatic speed changing vehicle, has the transmission efficiency height, simple in structure, advantage of low manufacturing cost.In existing electrical control automatic manual transmission technology, clutch separation engages and adopts electric-controlled hydraulic formula, electric-controlled pneumatic type and three kinds of driving mode of electricity powered formula.Wherein electric-controlled hydraulic formula drive unit has advantages such as the energy capacity is big, response is fast, be convenient to spatial arrangement, control performance is good, it is characterized in that providing pressure oil by independent hydraulic power source apparatus, the pressure oil that adopts a solenoid directional control valve control to enter clutch working cylinder is realized the separating action of clutch, adopt two to three high-speed switch electromagnetic valve controls to discharge the pressure oil of clutch working cylinder, realization clutch action is to satisfy in vehicle start and the shift process control requirement to clutch engagement.Because this electric-controlled hydraulic formula drive system needs independent hydraulic power device, comprise oil hydraulic pump, fuel tank, accumulator, oil purifier, direct current motor, valve piece, relief valve, selector valve, switch valve etc., many, the complex structure of element, system reliability reduces, and be not easy to general arrangement, manufacture cost is higher simultaneously, and maintenance difficulties is big.Advantages such as that electricity powered formula drive unit has structure is simple relatively, in light weight, control is convenient, but, can't directly adopt the electricity powered driving mode for the vehicle that adopts the hydraulic driving clutch.

Summary of the invention:

The objective of the invention is to propose a kind of motor-driven dry clutch hydrostatic drive device, by control to motor, realize the automatic control of clutch separation combination, not only kept the good advantage of hydraulic drive type Clutch Control performance, and simple in structure, and it is low to make maintenance cost, arrangement convenience, control is reliable, owing to adopted power assistant spring, can reduce the power and the moment of required drive motor.

For achieving the above object, technological scheme of the present invention is:

Critical piece of the present invention comprises motor (stepper motor or direct current generator), driving mechanism, clutch hydraulic pressure master cylinder and liquid container, the clutch hydraulic pressure master cylinder is installed on the housing left sideboard of driving mechanism, motor is installed on the right sideboard of housing, described driving mechanism comprises housing, nut slider; rocking arm; pitman arm shaft; power assistant spring; spring seat; adjusting screw and cover plate; motor output shaft is a screw mandrel; nut slider is placed in the housing; cooperate with the motor output shaft screw mandrel and can move along the screw mandrel axis but can not rotate; the nut slider end have with the clutch hydraulic pressure master cylinder in the cylindrical push rod of piston inner hole Spielpassung; the push rod end is a sphere; withstand on the inner ball surface of piston inner hole bottom; pitman arm shaft is fixed on the housing base plate; rocking arm is installed on the pitman arm shaft; be Spielpassung between pitman arm shaft and the rocking arm inner hole; power assistant spring is supported between rocking arm and the adjusting screw by the spring seat at two ends; adjusting screw is installed on the tapped hole of housing; an end end of rocking arm is a semi-cylindrical; be pressed on the plane in the middle part of the nut slider; the other end of rocking arm is a hemisphere face, cooperates with the spring seat ball-and-socket.Described clutch hydraulic pressure master cylinder comprises cylinder body, return spring, leather cup, spring sheet, piston, seal ring and back-up ring.Hydraulic main cylinder cylinder body left end has delivery outlet, links to each other with clutch working cylinder by hydraulic hose.Nut slider moves at motor driving lower edge axis, promotes piston axial motion in cylinder body by push rod.Piston is the cylinder of two ends band disc, in the piston left side spring sheet and leather cup is housed, and between leather cup and the cylinder base return spring is arranged, and seal ring is equipped with in the left side of piston right circles disk body.Repairing hole and oil inlet hole are arranged on the hydraulic main cylinder cylinder body, and Master cylinder body borrows repairing hole, oil inlet hole to communicate with oil storage tank.The piston middle part is thinner, makes the master cylinder inner chamber at piston middle part circularize the grease chamber.Circumferential six axial aperture are arranged on the disc of piston left end, return spring with leather cup, spring pressure to piston, cover aperture, form one-way valve, and piston pushed to the low order end position, make leather cup between repairing hole and oil inlet hole, two holes are all opened, and this moment, clutch was in bonding state.When the needs cut-off clutch, motor is rotated in the forward under the effect of control unit driving current, drives nut slider and moves to left, and push rod promotes piston to left movement, and return spring is compressed.After leather cup is closed compensate opening, fluid pressurized in master cylinder and the pipeline, pressure raises.Under the oil pressure effect, the clutch working cylinder piston promotes release bearing and diaphragm spring makes clutch separation.When the rapid engaging clutch of needs, ECU (Electrical Control Unit) is sent signal to motor, motor is reversed fast, the drive nut slider moves to right, hydraulic coupling in return spring and the pipeline comparatively fast moves to right master cylinder piston, and because fluid flows in pipeline certain resistance is arranged, it is slower to flow, and makes in the cylinder body on the piston left side and may form certain degree of vacuum.On cylinder chamber and the piston between the annular chamber under the pressure difference effect, a small amount of fluid is pushed the one-way valve that spring sheet and leather cup form open through oil inlet hole, flows to the left side by the gap between leather cup and the cylinder body and remedies vacuum.When original fluid that has been pressed onto clutch release slave cylinder by master cylinder flow back into master cylinder heavily again, because existing a small amount of compensation oil is through the one-way valve inflow, so total oil mass is too much.This part unnecessary oil promptly returns liquid container from the repairing orifice flow.In system,, or when causing the volume-variation of fluid, then borrow the repairing hole to make in time that oil mass obtains suitable increase and decrease in the whole oil circuit, to guarantee the reliability of normal oil pressure and hydraulic work system because of temperature variation because of leakage of oil.On the housing base plate, be fixed with two pitman arm shafts; be symmetrically installed with two rocking arms that on pitman arm shaft, rotate only on the pitman arm shaft; two power assistant spring that are supported on the spring seat are housed between adjusting screw and rocking arm; spring force is applied on the plane at nut slider middle part; make nut slider produce to the right thrust by rocking arm, in order to balance because the hydraulic coupling of clutch diaphragm spring power generation is applied to the thrust on the piston.Owing to the effect of spring assist mechanism, can reduce the driving power and the moment of motor greatly.Whole device is fixed on the suitable room on motor, speed changer or the car body by the mounting hole on the housing.

Compared to existing technology with disclosed technical paper, the technological progress that the present invention had is fairly obvious, owing to adopt such scheme, can be under the condition that does not need hydraulic power supply, the separating and combining of realization clutch is controlled automatically, has stronger adaptability and versatility, controls automatically applicable to the clutch of electric-controlled mechanical automatic speed changing vehicle, automatic clutch formula hand gear vehicle, double-clutch automatic speed-change vehicle and motorcycle, and apparatus structure is simple, reliable operation.

Description of drawings:

Fig. 1 is a plan view of the present invention,

Fig. 2 is an external view of the present invention,

Fig. 3 is a main clutch disengaging configuration plan view,

Fig. 4 is rocker structure figure,

Fig. 5 is the side view of Fig. 4,

Fig. 6 is the nut slider structural drawing,

Fig. 7 is the side direction view of Fig. 7,

Fig. 8 is the hydraulic coupling of clutch diaphragm spring generation and the hydraulic thrust balance schematic representation of servomechanism generation.

Among the figure: 1-housing 2-pitman arm shaft 3-Rocker arm 4-spring seat 5-power assistant spring 6-adjusting screw 7-screw 8-support 9-liquid container 10-oil connection 11-master cylinder body 12-return spring 13-leather cup 14-spring sheet 15-screw 16-piston 17-seal ring 18-back-up ring 19-nut slider 20-screw 21-motor 22-screw 23-cover plate A-repairing hole B-oil inlet hole

Embodiment:

Motor 21 is fixed on housing 1 right sideboard by screw 20, motor output shaft is a screw mandrel, screw-internal thread fit with nut slider 19, nut slider can move and can not rotate under the restriction of motor driving and housing and cover plate 23 along axial direction, cover plate is fixed on the housing by the nut on screw 22 and the pitman arm shaft 2, the nut slider left end is cylindrical push rod, this push rod inserts in piston 16 endoporus, between the push rod on piston inner hole and the nut slider, leave the gap, push rod end sphere contacts with the piston inner hole bottom, promotes piston and moves in master cylinder body 11.The piston both sides are disc, the circumference axial distribution has six through holes in left circles disk body upper edge, piston right circles disk body left side is equipped with seal ring 17, and piston left circles disk body end face has spring sheet 14, leather cup 13 and return spring 12, and aperture forms one-way valve on described spring sheet and the plunger disc body.Clutch master cylinder cylinder body 11 usefulness screws 15 are fixed on the housing left sideboard, arrange that with the motor coaxle line radially repairing hole A and oil inlet hole B are arranged on the cylinder body, and piston is carried out spacing back-up ring 18, and cylinder base has the tapped hole that oil connection 10 is installed.Compensate opening A on the cylinder body and oil inlet hole B are communicated with liquid container 9.Liquid container is fixed on the housing by support 8 usefulness screws 7.Piston is axially motion in cylinder body, and its stroke should satisfy the stroke that the required liquid volume of clutch working cylinder requires.The housing bottom surface is fixed with two pitman arm shafts 2; rocking arm 3 is installed on the pitman arm shaft; also and between the pitman arm shaft be rotatably assorted; rocking arm one end is a sphere; contact with spring seat 4 ball-and-sockets that support power assistant spring 5; the other end is pressed on the middle part end face of nut slider, and the power of power assistant spring is pressed on the nut slider all the time by rocking arm.Two adjusting screw 6 are arranged on the housing left sideboard, be used for Regulation spring power size, keep two spring stress unanimities, and make that spring produces to nut slider thrust and the hydraulic coupling that in clutch release slave cylinder, produces by clutch diaphragm spring power hydraulic thrust to the right (as shown in Figure 8) in a basic balance that master cylinder piston is subjected to left, thereby reduce the moment and the power of drive motor.

When clutch was in binding site, return spring to piston, covered aperture with leather cup, spring pressure, formed one-way valve, and piston is pushed to the low order end position, made leather cup between repairing hole and oil inlet hole, and two holes are all opened.When the needs cut-off clutch, motor is rotated in the forward under the effect of control unit driving current, drives nut slider and moves to left, and promotes piston to left movement, and return spring 12 is compressed.After leather cup is closed compensate opening A, fluid pressurized in the pipeline, pressure raises.Under the oil pressure effect, slave cylinder piston promotes release bearing and makes clutch separation.When needs during rapidly in conjunction with clutch, driver element sends signal to motor, motor is reversed fast, the drive nut slider moves to right, return spring comparatively fast moves to right master cylinder piston, and because fluid flows in pipeline certain resistance is arranged, it is slower to flow, and makes in the cylinder chamber of the piston left side and may form certain degree of vacuum.Under the pressure difference effect between the annular chamber on cylinder chamber and the piston, a small amount of fluid remedies vacuum through the one-way valve that oil inlet hole B pushes spring sheet and leather cup formation open by flowing in the leather cup gap in the cylinder chamber.When original fluid that has been pressed onto clutch release slave cylinder by master cylinder flow back into master cylinder heavily again, because existing a small amount of compensation oil is through the one-way valve inflow, so total oil mass is too much.This unnecessary oil promptly flows back to liquid container from compensate opening A.In hydraulic system,, or when causing the volume-variation of fluid, then borrow compensate opening A to make in time that oil mass obtains suitable increase and decrease in the whole oil circuit, to guarantee the reliability of normal oil pressure and hydraulic work system because of temperature variation because of leakage of oil.By control to motor steering and rotating speed, can realize the control of separating and combining speeds of clutch and stroke, satisfy the requirement of vehicle to Clutch Control.

Claims (1)

1. a motor-driven dry clutch hydrostatic drive device is made up of motor (21), driving mechanism, clutch hydraulic pressure master cylinder and liquid container (9); It is characterized in that wearing clutch hydraulic main cylinder is installed on the housing of driving mechanism (1) left plate; Motor is installed on the right plate of housing (1); Driving mechanism comprises housing (1); Nut slider (19); Rocking arm (3); Rocker arm shaft (2); Power assistant spring (5); Spring base (4); Adjustment screw (6) and cover plate (23); Motor (21) output shaft is screw mandrel; Nut slider (19) is placed in the housing (1); Cooperate with motor (21) output shaft screw mandrel and can move along the screw mandrel axis but can not rotate; Nut slider (19) end have with wearing clutch hydraulic main cylinder in the cylindrical push rod of piston (16) endoporus matched in clearance; The push rod end is sphere; Withstand on the Internal Spherical Surface of piston (16) endoporus bottom; Rocker arm shaft (2) is fixed on housing (1) base plate; Rocking arm (3) is installed on the rocker arm shaft (2); Be matched in clearance between rocking arm (3) endoporus and the rocker arm shaft (2); Power assistant spring (5) is supported between rocking arm (3) and the adjustment screw (6) by the spring base (4) at two ends; Adjustment screw (6) is installed on the screwed hole of housing (1); One end of rocking arm (3) is semi-cylindrical; Be pressed on the plane at nut slider (19) middle part; The other end of rocking arm (3) is hemisphere face; Cooperate rocking arm (3) with the spring base ball-and-socket; Rocker arm shaft (2); Power assistant spring (5) and spring base (4); Adjustment screw (6) is arranged symmetrically in the both sides of wearing clutch hydraulic main cylinder.

Images