JPH0718956U - Control device for auxiliary power take-out mechanism - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] A control device for an auxiliary power take-out mechanism that connects and disconnects auxiliary power obtained from an engine via a clutch and a transmission. Intermittent power extraction. [Constitution] In a control device for an auxiliary power take-out mechanism in which an auxiliary power take-out mechanism is turned on / off other than in a driver's seat, a two-way double check valve 12 is installed in the air pipe 11 of an air boosting cylinder, and an air tank is installed. The control valve 13 is manually installed between the 34 and the two-way double check valve.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a control device for an auxiliary power take-out mechanism that connects and disconnects auxiliary power obtained from an engine via a clutch and a transmission.

[0002]

[Prior art]

 For vehicles equipped with equipment exclusively used for cleaning and other tasks, such as manhole cleaning vehicles and sludge suction vehicles, the power required to operate such devices outputs the power required for running. It is taken out as auxiliary power from the engine through the clutch and transmission.

FIG. 3 is a diagram showing a basic configuration of the auxiliary power take-out mechanism. As shown in FIG. 4, the clutch operating unit 30 is connected to a drive input of a control valve 51 incorporated in a clutch booster 32 via a hydraulic pipe 31, and the control valve 51 is connected via a communication pipe 33. It is connected to the air tank 34. The hydraulic cylinder 52 built in the clutch booster 32 is connected to the clutch 35 via a clutch release fork (not shown). Here, the clutch booster 32 has an air booster cylinder (power cylinder) 53, and the air booster cylinder 53 is driven according to the air supplied through the control valve 51 described above, and is hydraulic cylinder 52. It has the function of pushing the piston. The clutch 35 transmits the power output from the engine 36 to the transmission 37, and the power output required for traveling or the above-mentioned auxiliary power is obtained.

In the clutch operating section 30, the clutch pedal 38 is connected to the shaft of a clutch master cylinder (MC) 39, and one input / output of the clutch master cylinder 39 is connected via a hydraulic pipe 40 to a clutch fluid tank (T) 41. Connected to. The other input / output of the clutch master cylinder 39 is connected to one end of the hydraulic pipe 31.

In the auxiliary power take-out mechanism having such a configuration, first, the clutch pedal 38 is depressed by the driver or other operator in order to obtain the auxiliary power. The clutch master cylinder 39 applies a predetermined hydraulic pressure to the clutch booster 32 via the hydraulic pipe 31 in response to the clutch pedal 38 depressed in this way. The control valve 51 is opened by this hydraulic pressure, and the air supplied from the air tank 34 through the communication pipe 33 is supplied to the air boosting cylinder 53. The piston of the hydraulic cylinder 52 is pushed by this air pressure, and interrupts the transmission of power between the engine 36 and the transmission 37 via the clutch release fork and the clutch 35.

Next, when the operator performs a predetermined operation to set a gear (hereinafter referred to as “PTO gear”) involved in the transmission of the above-mentioned auxiliary power to a predetermined meshing state, the transmission 37 is operated. It is set to a state where the auxiliary power can be taken out.

Further, when the operator gradually releases the depression of the clutch pedal 38, in the clutch 35, the hydraulic pressure applied through the hydraulic pipe 31 is decreased, and the piston of the hydraulic cylinder 52 is compressed by the air boosting cylinder 53. Is gradually stopped. Therefore, the clutch release fork returns to the original position and the interrupted power transmission is resumed, and the auxiliary power is given to the hydraulic pump and other supply destinations via the PTO gear.

FIG. 5 is a diagram showing a configuration example of a control device of a conventional auxiliary power take-out mechanism. In this configuration example, it is possible to intermittently take out the auxiliary power from outside the driver's seat, and the difference from the configuration example shown in FIG. 3 is that the hydraulic pipe 31 is placed in a T-shape through the hydraulic switching 3-way valve 60. is branched to, in conjunction with the clutch operating portion 30 lies in the configuration was placed outside the driver's seat through the hydraulic switching three-way valve 60 the same clutch operation unit 3 0 _2. Regarding the constituent elements of the clutch operating unit 30 _2, the same reference numerals as the corresponding constituent elements of the clutch operating unit 30 are shown with a subscript “ ₂ ”, and the clutch operating unit is associated with such a display. 30 and its constituent elements are shown by adding a subscript " ₁ " to each reference number.

In the auxiliary power take-out mechanism having such a configuration, the operation performed on the clutch 35 by the operator in order to obtain the auxiliary power is performed via the clutch operating section 30 _2. However, in the configuration shown in FIG. This is the same as that performed via the unit 30. The operations and operations of the other parts are also the same, so the description thereof will be omitted here.

Note that, as a device similar to the control device for such an auxiliary power take-out mechanism to intermittently supply power required for traveling, there is, for example, an “automatic clutch device for a vehicle” related to the same applicant as the present application ( Jpn. Pat. Appln. No. 4-65660).

[0011]

[Problems to be solved by the device]

By the way, in such a configuration of the conventional example, in order to enable the operation of the clutch 35 outside the driver's seat, many parts are provided together with the clutch operating section 30 _{1 used} for operating the clutch 35 during traveling. The clutch operating unit 30 ₂ is provided. Further, the hydraulic pressure switching three-way valve 60 used for providing such a clutch operating portion 30 ₂ is used only for a special purpose such as the above-mentioned auxiliary power take-out mechanism, so that it is in small demand and large in volume. It was not produced and was expensive.

In addition, such a conventional configuration generally includes the existing hydraulic pipe in which the clutch operating portion 30 ₂ and the hydraulic switching 3-way valve 60 are added to a truck or other vehicle manufactured based on the standard specifications. Since it was realized by changing the piping of 31, the number of work steps required for manufacturing was large and the cost was high.

An object of the present invention is to interrupt the extraction of auxiliary power from outside the driver's seat by using an inexpensive and simple mechanism.

[0014]

[Means for Solving the Problems]

 The present invention is a control device for an auxiliary power take-off mechanism in which the auxiliary power take-out mechanism is turned on and off outside the driver's seat, and a two-way double check valve is installed in the air pipe of the air boost cylinder of the clutch booster. It is characterized by a manual control valve mounted between the air tank and the 2-way double check valve.

[0015]

[Action]

 In the control device of the auxiliary power take-out mechanism according to the present invention, by manually turning on the control valve, boosting air from the air tank is added to the clutch booster and the clutch is disengaged via the clutch release fork. Therefore, it can be operated with a simple mechanism and does not require many parts such as the second clutch fluid tank and the clutch master cylinder as in the conventional example.

[0016]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing an embodiment of the present invention.

A structural difference between this embodiment and the conventional example shown in FIG. 5 is that a two-way double check is performed in the middle of the air pipe 11 connecting the air boosting cylinder 53 of the clutch booster and the control valve 51. The valve 12 is mounted, and is disposed outside the driver's seat between the two-way double check valve 12 and the air tank 34, and is replaced by the clutch operating unit 30 ₂ and the hydraulic pressure switching 3-way valve 60, and is continuously connected manually. It is equipped with a control valve (CV) 13 that can be opened and closed steplessly. The same functions and configurations as those shown in FIGS. 3 and 4 are designated by the same reference numerals, and the description thereof will be omitted here.

In the control device for the auxiliary power take-out mechanism having such a configuration, the control valve 13 is first opened by the operator in order to obtain the auxiliary power. The air in the air tank 34 drives the air boosting cylinder 53 via the control valve 13 and the two-way double check valve 12 thus opened. The piston of the hydraulic cylinder 52 is pushed by such an air boosting cylinder 53, and interrupts the transmission of power between the engine 36 and the transmission 37 via the clutch release fork and the clutch 35.

Next, when the operator performs a predetermined operation to set the above-mentioned gears involved in the transmission of the auxiliary power to a predetermined meshing state, the transmission 37 is set to a state in which the auxiliary power can be taken out. It

Further, when the operator gradually closes the control valve 13, in the clutch booster 32, the driving of the piston of the hydraulic cylinder 52 by the air boosting cylinder 53 is gradually stopped. Therefore, the clutch release fork returns to the original position and the transmission of the interrupted power is resumed, and the auxiliary power is given to the desired supply destination via the PTO gear.

As described above, according to the present embodiment, unlike the conventional example shown in FIG. 5, a simple configuration that can be realized without using the second clutch operation unit 30 ₂ or the hydraulic pressure switching 3-way valve 60 is used. , It is possible to control intermittently the auxiliary power outside the driver's seat. Further, the two-way double check valve 12 is a hydraulic pipe that was mass-produced inexpensively as a component of an air brake for general vehicles, has high reliability, and was indispensable for adding the clutch operating unit 30 _2. Since the work of changing the piping of 31 becomes unnecessary, the control device for controlling the extraction of the auxiliary power can be made inexpensive and compact.

In the present embodiment, all the operations related to the opening and closing of the control valve 13 are performed manually by the operator, but the present invention is not limited to such a configuration, and for example, FIG. As shown in FIG. 4, by tensioning the spring 22 that applies a biasing force to the lever 21 of the control valve 13 in the direction in which the control valve is closed, when the operator releases the lever 21, the spring 22 The control valve 13 is gradually and automatically closed by the urging force, and the power transmission state via the clutch 35 between the engine 36 and the transmission 37 is maintained without the operator operating the lever 21. Good.

[0023]

[Effect of device]

 As described above, according to the present invention, an air tank is installed in the air pipe that drives the air booster cylinder via the two-way double check valve that is mass-produced at low cost and has high reliability, and the manual control valve. The control device that connects and disconnects the auxiliary power by connecting it is cheaper due to the simple structure compared to the conventional example, which is configured by providing two clutch operating parts via an expensive hydraulic switching 3-way valve. Will be realized.

Therefore, in the vehicle to which the present invention is applied, the cost is reduced, the size is reduced, and the reliability is improved.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a view showing another embodiment of the present invention.

FIG. 3 is a diagram showing a basic configuration of an auxiliary power take-out mechanism.

FIG. 4 is a diagram showing a structure of a clutch booster.

FIG. 5 is a diagram showing a configuration example of a control device of a conventional auxiliary power take-out mechanism.

[Explanation of symbols]

 11 Air piping 12 2-way double check valve 13 Control valve (CV) 21 Lever 22 Spring 30 Clutch operating part 31, 40 Hydraulic pipe 32 Clutch booster 33 Communication pipe 34 Air tank 35 Clutch 36 Engine 37 Transmission 38 Clutch pedal 39 Clutch master cylinder ( MC) 41 Clutch fluid tank (T) 51 Control valve 52 Hydraulic cylinder 53 Air booster cylinder 60 Hydraulic switching 3-way valve

Claims (1)

[Scope of utility model registration request] 1. A control device for an auxiliary power take-out mechanism, wherein the auxiliary power take-out mechanism is switched on and off outside the driver's seat, and a two-way double check valve is mounted in the middle of the air pipe of a clutch air boost cylinder. A control device for an auxiliary power take-out mechanism, characterized in that a control valve is mounted between the air tank and the two-way double check valve.