JPH023760A - Pressure regulating valve device - Google Patents

Abstract

PURPOSE:To simplify a mechanism and to reduce an occupied space by a method wherein cam means respectively positioned facing a plurality of pressure regulating valves are supported by a support member formed by a bracket approximately in a U-shape. CONSTITUTION:First and second cams 51 and 52 are formed in different shapes in consideration of the roles of throttle valves 1 and 31, respectively, and are brought into contact with rollers 60 and 61 disposed to the tips of plungers 5 and 35. A cam means 50 is formed with the first and second cams 51 and 52, positioned facing first and second throttle valves, a sleeveform coupling member 53 for intercoupling the cams, and a shaft 55 rotatably supporting the cams 51 and 52 through a pair of bearings 54 situated in the coupling member. The shaft 55 is supported by a support member 9 being a bracket formed approximately in U-shape.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides cam means corresponding to a plurality of pressure regulating valves disposed in a hydraulic circuit of an automatic transmission, and the cam means is connected to a plurality of pressure regulating valves. The present invention relates to a pressure regulating valve device which provides desired conditions corresponding to the respective pressure regulating means of the pressure regulating valve by applying the same input to these cam means in contact with the plunger.

(Prior Art) In recent years, as vehicles equipped with automatic transmissions have become widespread, evaluations of automatic transmission performance have also become stricter. In particular, the shift sizzling that occurs when changing the gear train in an automatic transmission is bothersome even if it is slight because it affects the senses of the passenger, and its evaluation is even more severe.

In order to solve this shift problem, many methods and devices have been proposed and put into practical use.

On the other hand, improvements in the efficiency of the automatic transmission itself.

There is also a demand for smaller size and lighter weight.

By the way, automatic transmissions transmit rotational torque to and stop the elements by appropriately selecting frictional engagement devices (or restraint devices) attached to the constituent elements of the gear train using a hydraulic circuit based on various conditions. The gear train is switched by The frictional engagement device (or restraint device) is operated by a hydraulic servo and an actuator provided in a hydraulic circuit.

In this case, the pressure of the hydraulic oil that operates the hydraulic servo etc. is changed in accordance with the output of the engine. This is normally done using a throttle valve (pressure regulating valve) that generates a pressure corresponding to the throttle opening. The throttle pressure of the throttle valve works together with the governor pressure corresponding to the vehicle speed as a signal for switching the shift control valve.

(Problem to be Solved by the Invention) As described above, the throttle pressure corresponding to the throttle opening is used for main pressure control and shift control, but in order to perform shift control smoothly, different conditions are used. It is desirable to make it work. Usually, a cam means that moves in conjunction with the accelerator pedal is used to operate the pressure regulating means of the throttle valve to a desired condition. However, if the cam means were simply provided separately to correspond to each throttle valve, and an input member was individually provided for each cam means, there was a problem that the two mechanisms would be complicated and occupy too much space. Further, when the plunger that comes into contact with the cam means of these pressure regulating valves is guided by a sleeve inserted into the body, there is a problem that positioning and fixing the sleeve is troublesome.

The present invention has been made to solve the above problems. That is, an object of the present invention is to provide a pressure regulating valve device that has a simple mechanism and occupies a small space. Another object of the present invention is to provide a pressure regulating valve device that facilitates positioning and fixing of a sleeve used as a guide for a plunger of a pressure regulating valve.

(Means and Effects for Achieving the Object) In order to achieve the above object, the pressure regulating valve device according to the present invention has a plurality of pressure regulating valves arranged so that their plunger sides are adjacent to each other (preferably aligned and parallel to each other). At the same time, the corresponding cam means are connected by a connecting member so as to rotate integrally with each other, each of the cam means is supported by one support member, and this support member is a substantially U-shaped bracket. Features.

Preferably, this support member, which is a substantially U-shaped bracket, is fixed to the plunger side of the plurality of pressure regulating valves so that it also serves as a front cover of the pressure regulating valves. By bringing the tip of the sleeve that guides the plunger into contact with the support member using a spring provided on the back of the sleeve, the trouble of positioning and fixing the sleeve can be relieved.

According to the present invention, a plurality of pressure regulating valves are arranged parallel to each other and adjacent to each other, and the corresponding cam means are connected by a connecting member so as to rotate integrally with each other, and each of the cam means is supported by a single support member. Moreover, this support member is made into a substantially U-shaped bracket.

The mechanism is simple and the space occupied can be reduced. Furthermore, by appropriately setting the cam profiles of the plurality of cam means, it is possible to obtain a plurality of arbitrary hydraulic characteristics for the negative human power signal.

(Example) A specific example of the present invention will be described below with reference to one drawing.

The first throttle valve 1 shown in Fig. 1 is a throttle valve for main pressure control, and the pressure from the pump is controlled by applying the hydraulic pressure regulated according to the throttle opening as back pressure to the regulator valve. The main pressure in the oil passage is regulated by adjusting the oil to the throttle opening.

The first throttle valve 1 has a spool 4.0 which has a spring 3 mounted on one side (left side in the figure) of the valve body 2. a plunger 5 arranged in series with the spool 4; A pressure regulating spring 6 is provided between the spool 4 and the plunger 5. The plunger 5 has a structure in which it is guided by a sleeve 7. Sleeve 7 is valve body 2
The valve body is positioned by a spring 8 interposed between the valve body and a support member 9 fixed to the front surface of the valve body. The support member 9 is a bracket having a U-shape (substantially U-shape) in cross section, and the back surface of the bracket is fixed to the front surface of the valve body 2 .

Three lands 10, 11, 12 are formed on the spool 4 from the direction of the front spring 3, and correspondingly, three lands 13, 14, 15 are formed on the valve body 2. In this example, lands 11 and 12 have the same diameter, and land IO has a smaller diameter. 14 in the center is a pressure oil supply boat from the pump,
The boat 15 on the right side is an output port and is connected to a back pressure boat of the regulator valve, and the boat 13 on the left side is a back pressure boat and is connected to the output port 15 through appropriate throttling means.

Three lands 1B and 17.18 are also formed on the plunger 5, and a sleeve 7 is formed on the valve body 2 correspondingly.
Three boats 19.20.21 are formed through. The boat 19 on the left side of the figure is a supply boat from the regulator valve, the boat 2G in the center is connected to the output port 9, for example, to the boat of an actuator, and the boat 21 on the right side is used as a drain boat for draining oil from the actuator, for example. .

The first throttle valve 1 is disposed between a transmission case 22 and an oil pan 23, and a lower valve body 2B is disposed below the valve body 2 with a gasket 24 and a plate 25 in between. There is. Furthermore, a strainer 28 is attached to the lower part.

The second throttle valve 31 is constructed as shown in FIG. This second throttle valve 31 is a throttle valve for shift control, and has an output port connected to one back pressure boat of the shift valve, and works together with a governor connected to the other back pressure boat to control the shift valve. , and select the frictional engagement device or restraint device connected to the shift valve as appropriate.
The gears are changed according to the throttle opening and vehicle speed.

This second throttle valve 31 has a spring between one end (left side in the figure) and the valve body 32 in a valve body 32 that is integrally formed with the valve body 2 of the first throttle valve 1 described above. Spool 3 with 33 interposed
4. A plunger 35 arranged in series with the spool 34
．． A pressure regulating spring 3B is provided between the spool 34 and the plunger 35. This plunger 35
It also has a structure in which it is guided by a sleeve 37.

Like the sleeve 7, the sleeve 37 is positioned by a spring 38 interposed between it and the valve body and a support member 9 fixed to the front surface of the valve body.

Four lands 39, 40, 41, and 42 are formed on the spool 34 from the side to which the spring 33 is attached.

In this example, the lands 41 and 42 have the same diameter, and the land 40 has a smaller diameter and is larger than the land 39. Correspondingly, four boats 43, 44, 45, 46 are formed in the valve body 32.

The two boats 43 and 44 on the left end are back pressure boats, the next boat 45 is a supply port from the pump, and the boat 4B on the right end is an output port, which is connected to one back pressure boat of the shift valve. At least one of the back pressure boats 43, 44 is connected to the output port via suitable throttling means. Note that an appropriate signal pressure may be guided to the other boat.

The plunger 35 is formed with two lands 47 and 48, and the valve body 32 is formed with a boat 49 that communicates with the inside of the sleeve 37. This boat 49 has spool 3
It is connected to four back pressure boats 43, and one is normally used as a drain port.

As shown in FIG. 3, these two throttle valves 1 and 31 are arranged in parallel and adjacent to each other with their plunger sides aligned. In this example, the first throttle valve 1 is used for pressure control, and the second throttle valve 31 is used for shift control, but they may be interchanged, and one of them may be used for back pressure of an accumulator for shift control. Alternatively, it may be used as a signal pressure for a trimmer valve for speed change control.

The cam means 50 is shown in FIG. As can be seen from Figure 6, the first throttle valve corresponding to the first and second throttle valves 1.31
and second cam 51.52. These cams 51, 5
A sleeve-shaped connecting member 53. The shaft 5 rotatably supports the first and second cams 51 and 52 via a pair of bearings 54 provided inside the connecting member 53.
5. arranged via a spacer 56 on the shaft 55,
Return spring 57 that returns the cam to its original position. and a support member 9 which is a substantially U-shaped bracket that supports the shaft 55. The shaft 55 is fixed to the support member 9 with a clip 58. 1st and 2nd
The cam 51.52 is.

Its position within the support member 9 is regulated by the spacer 59 and the clip 58 described above.

The first and second cams 51.52 are formed in different shapes taking into consideration the roles of the respective throttle valves 1.31, and correspond to rollers eo and at disposed at the tips of the plungers 5 and 35. are in contact with each other.

One end of the return spring 57 is locked to the first cam 51, and the other end is locked to the support member 9.

The input means for the first and second cams 51,52 are:
As shown in FIG. 1, this is a wire B3 that connects the first cam 51 and the accelerator pedal. One end of the wire 63 is connected to the cam 5
1, and its extension is guided through a groove provided on the outer periphery of the cam 51 to the accelerator pedal.

When the accelerator pedal is depressed, the throttle opens according to the amount of depression, and at the same time the cams 51 and 52 rotate. cam 51
．． 52, the plungers 5 and 35, which come into contact with the outer circumferences of the cams 51 and 52 via rollers 60.81, are driven within the sleeve 7.37, and the pressure regulating spring 6.36
Each is deflected separately and a different load is applied to each.

Pressure regulating spring 6.36 is.

A load corresponding to the given amount of deflection is applied to the spring 3.33, and the supplied hydraulic pressure is regulated in accordance with the load on the pressure regulating spring 6.36, and each throttle pressure is output from the output boat 15.48. Ru.

The throttle pressure is applied to the back pressure port 13 of each valve 1, 31.
．． 43 or 44, and the output port 15,
When the amount of hydraulic oil coming out from 4B increases and the throttle pressure decreases, the spool 4.34 moves back and opens the valve, bringing the throttle pressure close to the throttle opening degree and at the same time providing a stable flow of hydraulic oil. supply. On the other hand, when the amount of hydraulic oil decreases, the spools 4, 34 move forward, close the valve, and reduce the pressure to a predetermined throttle pressure.

When the amount of depression of the accelerator pedal becomes small, the cams 51, 52 are rotated in the opposite direction by the return spring 57 until the accelerator is opened. Follow this.

The plungers 5 and 35 also operate, and the valve operation as described above is performed.

FIGS. 7 and 8 show another embodiment of the present invention. The cams 51, 52 are supported on the shaft 55 via bearings 70, 71, respectively.

These cams 51, 52 are connected by a connecting member 72 that is fixed or integrally formed on the outer circumference of the cams 51, 52. These cams 51, 52 are also connected to spacers 73, 52 on a shaft 55 attached to a support member 9, which is a substantially U-shaped bracket. Color 74. and clip 5
The axial position is regulated by 8. Cam51.
The return spring 75 that returns the collar 7
4, one end is locked to the connecting member 72, and the other end is locked to the support member 9. The operation in this example is
There is no difference in the basic operation from the previous embodiment, so
The explanation will be omitted.

(Effects of the Invention) According to the present invention, a plurality of pressure regulating valves are arranged parallel to each other and adjacent to each other, and the corresponding cam means are connected to each other by a connecting member so as to rotate integrally with each other, and the respective cam means are connected together so as to rotate together. It is supported by two supporting members, and this supporting member is a substantially U-shaped bracket.

The mechanism is simple and the space occupied can be reduced. Further, by appropriately setting the cam profiles of the plurality of cam means, it is possible to obtain a plurality of arbitrary hydraulic characteristics for a negative input signal.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment of the present invention, FIG. 2 is a sectional view showing the relationship between the second throttle valve and the cam in the same embodiment, and FIG. 3 is a plan view of the same embodiment. 4 is a front view of FIG. 3, FIG. 5 is a diagram showing a state in which the clip and shaft are coupled in the same embodiment, and FIG. 6 is a sectional view taken along the line Vl--Vl of FIG. 3. FIG. 7 is a sectional view showing another embodiment of the present invention, and FIG. 8 is a side view of FIG. 7. 1.31... Throttle valve 5.35... Plunger 6.3B... Pressure regulating spring 9... Support member 50... Cam means 53...
・Connecting member B3...Wire 72...Connecting member Applicant: Aisin Seiki Co., Ltd. (one other person) Agent: Patent attorney Asa Kato, Applicant 4, Figure 6, Figure 2, Figure 3, Figure 7, Figure 8 Figure Q

Claims (2)

[Claims] (1) Provide cam means corresponding to each of the plurality of pressure regulating valves disposed in the hydraulic circuit of the automatic transmission, and apply the same input to these cam means by bringing the cam means into contact with the plunger of the pressure regulating valve. In the pressure regulating valve device, the pressure regulating valves are arranged adjacent to each other, and the corresponding cam means are rotated integrally with each other by a connecting member. A pressure regulating valve device characterized in that the respective cam means are supported by one support member, and the support member is a substantially U-shaped bracket. (2) The pressure regulating valve device according to claim 1, wherein the support member is fixed to the plunger side of the plurality of pressure regulating valves and also serves as a front cover of the pressure regulating valves.