KR20160050803A - Cooling system for brake device of forklift - Google Patents

Cooling system for brake device of forklift Download PDF

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Publication number
KR20160050803A
KR20160050803A KR1020140149833A KR20140149833A KR20160050803A KR 20160050803 A KR20160050803 A KR 20160050803A KR 1020140149833 A KR1020140149833 A KR 1020140149833A KR 20140149833 A KR20140149833 A KR 20140149833A KR 20160050803 A KR20160050803 A KR 20160050803A
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South Korea
Prior art keywords
cooling
temperature
cooling oil
cooler
oil
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KR1020140149833A
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Korean (ko)
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KR102038159B1 (en
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한동호
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주식회사 두산
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T5/00—Vehicle modifications to facilitate cooling of brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/003—Safety valves; Equalising valves, e.g. pressure relief valves reacting to pressure and temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/002—Actuating devices; Operating means; Releasing devices actuated by temperature variation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/10—Road Vehicles
    • B60Y2200/15—Fork lift trucks, Industrial trucks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/30—Sensors
    • B60Y2400/302—Temperature sensors

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

The present invention relates to a cooling device for a brake device of a forklift. The cooling device for a brake device of a forklift maintains a predetermined level of heat dissipation performance by cooling heat when the heat is generated in a service brake, wherein the service brake is provided to a drive shaft of a forklift. According to an embodiment of the present invention, the cooling device for a brake device of a forklift can prevent a cooler from being damaged by enabling cooling oil to bypass the cooler when pressure of the cooling oil is abnormally increased or has possibility of an increase in the pressure of the cooling oil.

Description

Technical Field [0001] The present invention relates to a cooling device for a forklift,

The present invention relates to a cooling device for a braking device for a forklift, and more particularly, to a cooling device for a braking device for a forklift, which is provided with a service brake on a driving shaft of a forklift, To a cooling device for a braking device of a forklift.

Generally, a service brake is provided on a drive shaft of a forklift. Heat is generated while the service brake is operating. The heat generation raises the temperature of the cooling oil, and a cooling device for the braking device is used to prevent the cooling oil from overheating.

A conventional cooling apparatus for a braking device of a forklift will be described with reference to Fig. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a hydraulic circuit diagram for explaining a conventional cooling device for a braking device of a forklift. Fig.

A conventional cooling device for a braking device includes a hydraulic pump 1, an oil tank 2, a cooler 3, and a service brake 4.

The hydraulic pump 1 and the cooler 3 are connected to the first hydraulic line L1. The cooler 3 and the service brake 4 are connected to the second hydraulic line L2. The service brake (4) and the oil tank (2) are connected to the third hydraulic line (L3).

A bypass line L4 is connected to connect the front end and the rear end of the cooler 3 and a check valve 5 is provided to the bypass line L4.

The hydraulic pump 1 sucks cooling oil from the oil tank 2 and discharges it to the cooler 3 side. The cooler 3 cools the introduced cooling oil. The cooling oil passed through the cooler 3 is supplied to the service brake 4 in a cooled state to cool the service brake 4. [ The cooling oil passed through the service brake (4) is returned to the oil tank (2).

On the other hand, when a problem occurs in the cooler 3 and the cooling oil can not smoothly pass through the cooler 3, the pressure rises at the front end of the cooler 3, The check valve 5 is opened. Thereafter, the cooling oil is supplied to the service brake 4 bypassing the cooler 3.

However, the conventional cooling apparatus for a braking device of a forklift constructed and operated as described above has the following problems.

The lower the ambient temperature, the higher the viscosity of the cooling oil. The viscosity of the cooling oil can be further increased, especially during the winter season. At this time, the first hydraulic line L1 may be formed with an abnormal high pressure higher than a normal pressure that the cooler 3 can accommodate.

The longer the length of the second hydraulic line L2 connected between the cooler 3 and the service brake 4 is, the larger the forklift is. The longer the second hydraulic line L2 is, the higher the pressure is required for the cooling oil.

Further, since the cooling oil generates a pressure loss while passing through the cooler 3 or the service brake 4, a higher pressure is required to compensate for the loss.

The cooler 3 may exceed the permissible pressure that the cooler 3 can accommodate in the case where abnormally high pressure is formed at the front end of the cooler 3 or a higher pressure is formed for various reasons as described above. There is a problem that it is broken.

On the other hand, although the conventional cooling apparatus for a braking device for a forklift is provided with a check valve 5, there are cases where the check valve 5 can not operate normally and the check valve 5 can not be opened There is a problem that the cooler 3 is severely damaged.

For example, an open pressure is set in the check valve 5, and in a normal situation, it will be opened when the corresponding open pressure is formed to bypass the cooling oil. However, if the temperature drops drastically and the atmospheric temperature is very low, the viscosity of the cooling oil may be abnormally too high. At this time, the check valve 5 may not operate normally.

Korean Patent Publication No. 10-1998-0010004 (Apr. 30, 1998) Korean Patent Publication No. 10-1998-0059413 (1998.10.07)

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a cooling device for a braking system for a forklift, which is capable of preventing a cooler from being damaged when coolant oil rises or rises abnormally in a cooling device And a cooling device for a braking device of a forklift truck.

The present invention has been made in view of the above problems, and it is an object of the present invention to at least partially solve the problems in the conventional arts. There will be.

According to an aspect of the present invention, there is provided a cooling device for a braking device for a forklift, comprising: an oil tank for storing cooling oil; A hydraulic pump 11 for sucking and discharging the cooling oil; A cooler 13 for cooling the discharged cooling oil; A service brake 14 that is cooled by the cooled cooling oil and allows the used cooling oil to be returned to the oil tank 12; A first bypass line (L14) connecting the front end of the service brake (14) and the rear end of the service brake (14); And a check valve (15) provided in the first bypass line (L14) and opened when an abnormally high pressure is generated at the front end of the service brake (14), so that the cooled cooling oil bypasses the service brake (14) .

The cooling device for the braking device of the forklift according to the embodiment of the present invention may further include a second bypass line L15 connected to the oil tank 12 from the front end of the cooler 13; And a relief valve (16) installed on the second bypass line (L15) to set a pressure that the cooler (13) can accommodate.

The cooling device for the braking device of the forklift according to the embodiment of the present invention further includes a third bypass line L16 for connecting the front end of the cooler 13 and the rear end of the cooler 13; And a third bypass line (L16), which is closed when the temperature of the cooling oil discharged from the hydraulic pump (12) is higher than the set temperature, and is opened when the temperature is lower than the set temperature, And a thermostat valve (17) for bypassing the cooler (13).

The cooling device for the braking device of the forklift according to the embodiment of the present invention may further include a temperature sensor 18 for detecting the temperature of the cooling oil at the front end of the thermostat valve 17; And a controller (20) which is controlled to display an abnormal temperature on the instrument panel (21) when a temperature value of the cooling oil detected by the temperature sensor (18) is received and deviates from an allowable temperature range .

The cooling device for the braking device of the forklift according to the embodiment of the present invention may further include a temperature sensor 18 for detecting the temperature of the cooling oil at the front end of the thermostat valve 17; And a controller 20 for receiving a temperature value of the cooling oil detected by the temperature sensor 18 and controlling the buzzer 22 to send out a warning sound when the temperature is out of the allowable temperature range.

The cooling device for the braking device of the forklift according to the embodiment of the present invention may further include a temperature sensor 18 for detecting the temperature of the cooling oil at the front end of the thermostat valve 17; And a controller (20) which is controlled such that the speed of the vehicle is decelerated by the transmission controller (23) when the temperature value of the cooling oil detected by the temperature sensor (18) .

The cooling device for the braking device of the forklift according to the embodiment of the present invention further includes a third bypass line L16 for connecting the front end of the cooler 13 and the rear end of the cooler 13; A hydraulic valve 19 provided on the third bypass line L16 and opened and closed; A temperature sensor (18) for detecting the temperature of the cooling oil at a front end of the hydraulic valve (19); And a temperature value of the cooling oil detected by the temperature sensor (18). When the temperature value is higher than the set temperature, the hydraulic valve (19) is controlled to be kept closed. When the temperature value is lower than the set temperature And a controller 20 which is controlled such that the hydraulic valve 19 is opened.

Further, in the cooling device for a braking device for a forklift according to the embodiment of the present invention, when the temperature of the cooling oil exceeds the allowable temperature range, the controller 20 controls the dashboard 21 to display an abnormal temperature .

In the cooling device for a braking device of a forklift according to an embodiment of the present invention, when the controller 20 determines that the temperature value of the cooling oil is out of the permissible temperature range, the buzzer 22 is controlled to send a warning sound Lt; / RTI >

In the cooling device for a braking device for a forklift according to an embodiment of the present invention, when the controller 20 determines that the temperature of the cooling oil is out of the allowable temperature range, the transmission controller 23 decelerates And so on.

The details of other embodiments are included in the detailed description and drawings.

The cooling device for the braking device of the forklift according to the embodiment of the present invention as described above can prevent the abnormal increase of the pressure on the cooling oil at the front end of the cooler and the pressure of the cooling oil rises or rises abnormally When there is a concern, the cooling oil can bypass the cooler clearly so that the damage of the cooler can be minimized and the life of the cooler can be prevented from being abnormally shortened.

1 is a hydraulic circuit diagram for explaining a conventional cooling apparatus for a braking device of a forklift.
2 is a hydraulic circuit diagram for explaining a cooling device for a braking device of a forklift according to an embodiment of the present invention.
3 is a hydraulic circuit diagram for explaining a cooling device for a braking device of a forklift according to another embodiment of the present invention.
4 is a hydraulic circuit diagram for explaining a cooling device for a braking device of a forklift according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent by reference to the embodiments described in detail below with reference to the accompanying drawings.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that the embodiments described below are provided for illustrative purposes only, and that the present invention may be embodied with various modifications and alterations. In the following description, well-known functions or constructions are not described in detail to avoid obscuring the subject matter of the present invention. The accompanying drawings are not necessarily drawn to scale to facilitate understanding of the invention, but may be exaggerated in size.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

Like reference numerals refer to like elements throughout the specification.

≪ Embodiment 1 >

Hereinafter, a cooling apparatus for a braking device for a forklift according to an embodiment of the present invention will be described with reference to FIG. 2 is a hydraulic circuit diagram for explaining a cooling device for a braking device of a forklift according to an embodiment of the present invention.

A cooling device for a braking device according to an embodiment of the present invention includes a hydraulic pump 11, an oil tank 12, a cooler 13, and a service brake 14.

The hydraulic pump 11 and the cooler 13 are connected to the first hydraulic line L11. The cooler 13 and the service brake 14 are connected to the second hydraulic line L12. And the service brake 14 and the oil tank 12 are connected to the third hydraulic line L13.

A first bypass line L14 is connected to connect the front end and the rear end of the service brake 14 and a check valve 15 is provided to the first bypass line L14.

Particularly, the point at which the first bypass line L14 is connected at the second hydraulic line L12 is much closer to the service brake 14 than to the cooler 13.

The first hydraulic line L11 and the service oil tank 12 are connected to the second bypass line L15 at the front end of the cooler 13. The relief valve 16 is provided in the second bypass line L15. The relief valve 16 can be set to a pressure that the cooler 13 can accommodate.

The cooling device for the braking device of the forklift according to the embodiment of the present invention is configured such that when the cooling oil is not returned to the oil tank 12 due to a problem at the service brake 14 side, Pressure can rise. In this case, the check valve 15 is opened to discharge a part of the cooling oil via the first bypass line L14. As a result, it is possible to prevent the pressure inside the second hydraulic line L12 from abnormally rising, and further, it is possible to prevent the abnormally high pressure from affecting the cooler 13, thereby preventing the cooler 13 from being damaged.

Further, if the viscosity of the cooling oil is increased due to an external environmental factor, for example, because the ambient temperature is low, there is a fear that the pressure is increased at the front end of the cooler 13. At this time, the pressure of the cooling oil can be lowered by opening the relief valve 16, and further, it is possible to prevent the abnormal high pressure from affecting the cooler 13, thereby preventing the cooler 13 from being damaged.

≪ Embodiment 2 >

Hereinafter, a cooling apparatus for a braking device for a forklift according to another embodiment of the present invention will be described with reference to FIG. 3 is a hydraulic circuit diagram for explaining a cooling device for a braking device of a forklift according to another embodiment of the present invention.

A cooling device for a braking device according to another embodiment of the present invention comprises a hydraulic pump 11, an oil tank 12, a cooler 13, and a service brake 14. [

The hydraulic pump 11 and the cooler 13 are connected to the first hydraulic line L11. The cooler 13 and the service brake 14 are connected to the second hydraulic line L12. And the service brake 14 and the oil tank 12 are connected to the third hydraulic line L13.

A first bypass line L14 is connected to connect the front end and the rear end of the service brake 14 and a check valve 15 is provided to the first bypass line L14.

Particularly, the point at which the first bypass line L14 is connected at the second hydraulic line L12 is much closer to the service brake 14 than to the cooler 13.

Further, the third bypass line L16 is connected to the rear end of the cooler 13 at the front end of the cooler 13. The third bypass line L16 is provided with a thermostat valve 17. The thermostat valve 17 is opened when the set temperature is reached.

For example, the set temperature can be set when the temperature of the cooling oil is 30 degrees. Accordingly, when the temperature of the cooling oil is higher than the set temperature, the closed state is maintained and the cooling oil passes through the cooler 13. If the temperature of the cooling oil is lower than the set temperature, the thermostat valve 17 is opened so that the cooling oil bypasses the cooler 13. Therefore, it is possible to prevent the cooler 13 from being damaged.

On the other hand, the thermostat valve 17 may further include a temperature sensor 18 at a front end thereof. The temperature sensor 18 detects the temperature of the cooling oil, and the detected temperature value is provided to the controller 20.

On the other hand, there is a case where the thermostat valve 17 is broken for an unknown reason. At this time, it is possible to know whether or not the current temperature of the cooling oil is within the allowable temperature range by the temperature sensor 18 described above. If the temperature of the cooling oil is abnormally high beyond the temperature allowable temperature range, for example, if the temperature of the cooling oil is 120 degrees or more, it is regarded that an abnormality has occurred in the thermostat valve 17.

That is, the controller 20 determines how much the current temperature of the cooling oil is. If the temperature is out of the permissible temperature range, the controller 20 displays an abnormal temperature on the instrument panel 21 to determine that the temperature of the cooling oil is abnormal I will know. This allows the driver to recognize that there is a problem with the cooling system and take action.

In addition, the controller 20 determines the current temperature of the cooling oil. When the temperature is out of the allowable temperature range, the controller 20 generates a warning sound through the buzzer 22 to ventilate the surroundings to the driver, Thereby indicating that the temperature of the cooling oil is abnormal. Furthermore, the driver can recognize that there is a problem with the system of the cooling device and take action.

Further, the controller 20 determines the current temperature of the cooling oil, and can provide the temperature information to the transmission controller 23 when the temperature exceeds the allowable temperature range. On the other hand, it can be understood that the temperature outside the allowable temperature range may not be normally cooled with respect to the service brake 14. In response to this, the transmission controller 23 controls the speed of the vehicle to decelerate, thereby stabilizing the running of the forklift.

≪ Third Embodiment >

Hereinafter, a cooling apparatus for a braking device for a forklift according to another embodiment of the present invention will be described with reference to FIG. 4 is a hydraulic circuit diagram for explaining a cooling device for a braking device of a forklift according to another embodiment of the present invention.

A cooling device for a braking device according to another embodiment of the present invention includes a hydraulic pump 11, an oil tank 12, a cooler 13, and a service brake 14.

The hydraulic pump 11 and the cooler 13 are connected to the first hydraulic line L11. The cooler 13 and the service brake 14 are connected to the second hydraulic line L12. And the service brake 14 and the oil tank 12 are connected to the third hydraulic line L13.

A first bypass line L14 is connected to connect the front end and the rear end of the service brake 14 and a check valve 15 is provided to the first bypass line L14.

Particularly, the point at which the first bypass line L14 is connected at the second hydraulic line L12 is much closer to the service brake 14 than to the cooler 13.

Further, the third bypass line L16 is connected to the rear end of the cooler 13 at the front end of the cooler 13. A hydraulic valve 19 is provided in the third bypass line L16. The hydraulic valve 19 is opened and closed according to the pilot signal.

On the other hand, the thermostat valve 17 may further include a temperature sensor 18 at a front end thereof. The temperature sensor 18 detects the temperature of the cooling oil, and the detected temperature value is provided to the controller 20.

The controller 20 generates a pilot signal according to the temperature value of the cooling oil and supplies the pilot signal to the hydraulic valve 19. [

For example, the set temperature can be set when the temperature of the cooling oil is 30 degrees. Accordingly, when the temperature of the cooling oil is higher than the set temperature, the hydraulic valve 19 is maintained in the closed state, so that the cooling oil passes through the cooler 13. If the temperature of the cooling oil is lower than the set temperature, the controller 20 generates a pilot signal so that the hydraulic valve 19 is opened. The hydraulic valve 19 is opened when a pilot signal for opening is received, so that the cooling oil bypasses the cooler 13. Therefore, it is possible to prevent the cooler 13 from being damaged.

On the other hand, there may be cases where the hydraulic valve 19 is unable to operate for an unknown reason. At this time, it is possible to know whether or not the current temperature of the cooling oil is within the allowable temperature range by the temperature sensor 18 described above. If the temperature of the cooling oil becomes abnormally high beyond the temperature allowable temperature range, for example, if the temperature of the cooling oil is 120 degrees or more, the hydraulic valve 19 is considered to be in a non-normal state.

That is, the controller 20 determines how much the current temperature of the cooling oil is. If the temperature is out of the permissible temperature range, the controller 20 displays an abnormal temperature on the instrument panel 21 to determine that the temperature of the cooling oil is abnormal I will know. This allows the driver to recognize that there is a problem with the cooling system and take action.

In addition, the controller 20 determines the current temperature of the cooling oil. When the temperature is out of the allowable temperature range, the controller 20 generates a warning sound through the buzzer 22 to ventilate the surroundings to the driver, Thereby indicating that the temperature of the cooling oil is abnormal. Furthermore, the driver can recognize that there is a problem with the system of the cooling device and take action.

Further, the controller 20 determines the current temperature of the cooling oil, and can provide the temperature information to the transmission controller 23 when the temperature exceeds the allowable temperature range. On the other hand, it can be understood that the temperature outside the allowable temperature range may not be normally cooled with respect to the service brake 14. In response to this, the transmission controller 23 controls the speed of the vehicle to decelerate, thereby stabilizing the running of the forklift.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. will be.

Therefore, it should be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive, and the scope of the present invention is indicated by the appended claims. The scope of the claims and their equivalents It is to be understood that all changes or modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

The cooling device for the braking device of the forklift according to the embodiment of the present invention can be used to prevent the cooler from being damaged by abnormal pressure of the cooling oil.

1, 11: Hydraulic pump 2, 12: Oil tank
3, 13: cooler 4, 14: service brake
5, 15: Check valve 16: Relief valve
17: thermostat valve 18: temperature sensor
19: Hydraulic valve
20: controller 21: instrument panel
22: buzzer 23: transmission controller
L1 to L3: first to third hydraulic lines
L11 to L13: first to third hydraulic lines
L4: Bypass line
L14 to L16: first to third bypass lines

Claims (10)

An oil tank 12 in which cooling oil is accommodated;
A hydraulic pump 11 for sucking and discharging the cooling oil;
A cooler 13 for cooling the discharged cooling oil;
A service brake 14 that is cooled by the cooled cooling oil and allows the used cooling oil to be returned to the oil tank 12;
A first bypass line (L14) connecting the front end of the service brake (14) and the rear end of the service brake (14); And
A check valve 15 installed in the first bypass line L14 to open when the abnormally high pressure is generated at the front end of the service brake 14 so that the cooled cooling oil bypasses the service brake 14;
And a cooling device for a braking device for a forklift.
The method according to claim 1,
A second bypass line L15 connected from the front end of the cooler 13 to the oil tank 12; And
A relief valve (16) installed on the second bypass line (L15) to set a pressure that can be received by the cooler (13);
Further comprising: a cooling device for cooling the braking device.
The method according to claim 1,
A third bypass line L16 connecting the front end of the cooler 13 and the rear end of the cooler 13; And
When the temperature of the cooling oil discharged from the hydraulic pump (12) is higher than the set temperature, the closed state is maintained. When the temperature of the cooling oil discharged from the hydraulic pump (12) is lower than the set temperature, A thermostat valve (17) for bypassing the thermostat valve (13);
Further comprising: a cooling device for cooling the braking device.
The method of claim 3,
A temperature sensor 18 for detecting the temperature of the cooling oil at the front end of the thermostat valve 17; And
A controller (20) which is controlled to display an abnormal temperature on the instrument panel (21) when the temperature value of the cooling oil detected by the temperature sensor (18) is received and out of the allowable temperature range;
Further comprising: a cooling device for cooling the braking device.
The method of claim 3,
A temperature sensor 18 for detecting the temperature of the cooling oil at the front end of the thermostat valve 17; And
A controller 20 for controlling the buzzer 22 to emit a warning sound when the temperature value of the cooling oil detected by the temperature sensor 18 is received and the temperature is out of the allowable temperature range;
Further comprising: a cooling device for cooling the braking device.
The method of claim 3,
A temperature sensor 18 for detecting the temperature of the cooling oil at the front end of the thermostat valve 17; And
A controller (20) which is controlled so that the speed of the vehicle is decelerated by the transmission controller (23) when the temperature value of the cooling oil detected by the temperature sensor (18)
Further comprising: a cooling device for cooling the braking device.
The method according to claim 1,
A third bypass line L16 connecting the front end of the cooler 13 and the rear end of the cooler 13;
A hydraulic valve 19 provided on the third bypass line L16 and opened and closed;
A temperature sensor (18) for detecting the temperature of the cooling oil at a front end of the hydraulic valve (19); And
When the temperature value of the cooling oil detected by the temperature sensor 18 is received and the temperature value is higher than the set temperature, the hydraulic valve 19 is controlled to be kept closed. If the temperature value is lower than the set temperature A controller (20) controlled to open the hydraulic valve (19);
Further comprising: a cooling device for cooling the braking device.
8. The method of claim 7,
The controller (20)
And is controlled to display the abnormal temperature on the instrument panel 21 when the temperature value of the cooling oil is out of the allowable temperature range
And a cooling device for the braking device of the forklift.
8. The method of claim 7,
The controller (20)
The buzzer 22 is controlled so as to send out a warning sound when the temperature value of the cooling oil is out of the allowable temperature range
And a cooling device for the braking device of the forklift.
8. The method of claim 7,
The controller (20)
And that the speed of the vehicle is decelerated at the transmission controller 23 when the temperature value of the cooling oil is out of the allowable temperature range
And a cooling device for the braking device of the forklift.
KR1020140149833A 2014-10-31 2014-10-31 Cooling system for brake device of forklift KR102038159B1 (en)

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KR102038159B1 KR102038159B1 (en) 2019-10-29

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017099267A1 (en) * 2015-12-08 2017-06-15 주식회사 두산 Cooling device for forklift brake system
EP3378712A1 (en) * 2017-03-21 2018-09-26 Allison Transmission, Inc. Deceleration based brake coolant system and method

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Publication number Priority date Publication date Assignee Title
JPH0769202A (en) * 1993-09-02 1995-03-14 Saitama Kiki Kk All hydraulic power brake device
KR980010004A (en) 1996-07-27 1998-04-30 추호석 Forklift Disc Brake Cooling System
KR19980059413A (en) 1996-12-31 1998-10-07 추호석 Chillers for wet disc brakes
JP2005054941A (en) * 2003-08-06 2005-03-03 Toyota Industries Corp Cooling oil circuit
JP2010229910A (en) * 2009-03-27 2010-10-14 Komatsu Ltd Driving force control device for working vehicle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0769202A (en) * 1993-09-02 1995-03-14 Saitama Kiki Kk All hydraulic power brake device
KR980010004A (en) 1996-07-27 1998-04-30 추호석 Forklift Disc Brake Cooling System
KR19980059413A (en) 1996-12-31 1998-10-07 추호석 Chillers for wet disc brakes
JP2005054941A (en) * 2003-08-06 2005-03-03 Toyota Industries Corp Cooling oil circuit
JP2010229910A (en) * 2009-03-27 2010-10-14 Komatsu Ltd Driving force control device for working vehicle

Cited By (4)

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