WO2020013554A1

WO2020013554A1 - Automatic parking system for industrial vehicle and construction equipment

Info

Publication number: WO2020013554A1
Application number: PCT/KR2019/008385
Authority: WO
Inventors: 강민준; 김광인; 이호준; 손형곤
Original assignee: (주)엠에스정밀
Priority date: 2018-07-13
Filing date: 2019-07-08
Publication date: 2020-01-16
Also published as: KR101914571B1

Abstract

An automatic parking system for an industrial vehicle and construction equipment of the present invention: performs control such that, if a parking switch is set to be turned on, a transmission control unit sets a forward-side solenoid valve and a reverse-side solenoid valve to turn same off when a brake pedal switch is turned on and a current vehicle speed inputted from a speed detection sensor (300) is 0 km, so as to cut off the supply of working fluid and the hydraulic pressure of the working fluid to a forward clutch unit and a reverse clutch unit such that the forward clutch unit and the reverse clutch unit are connected to a vehicle axle unit; and performs control such that the transmission control unit sets one from among the forward-side solenoid valve and the reverse-side solenoid valve to turn same on according to the position of a gear-shift stage of a gear-shift operation unit when the brake pedal switch is turned off and an accelerator pedal switch is turned on, so as to allow the supply of the working fluid and the working fluid to the forward clutch unit or the reverse clutch unit, which is set to be turned on, such that the forward clutch unit or the reverse clutch unit is disconnected from the vehicle axle unit.

Description

Auto parking system for industrial vehicles and construction equipment

The present invention relates to an auto parking system for an industrial vehicle and construction equipment, and more particularly to an auto parking system for an industrial vehicle and construction equipment for implementing an electronic parking of industrial vehicles and construction equipment, such as forklifts.

In general, the transmission of the industrial vehicle (for example, forklift) is provided with a clutch unit, and serves to transmit the power of the engine to the axle to perform the forward or backward driving function of the vehicle.

When the transmission is applied as a forward and backward single stage transmission, the transmission includes a forward clutch assembly for driving forward and a reverse clutch assembly for driving backward.

Thus, when the forward solenoid valve that controls the flow of the flow from the transmission pump is turned on, the forward clutch assembly is coupled to transmit power to the axle, while when the reverse solenoid valve is turned on, the reverse clutch assembly is coupled to power the axle. Delivered.

Conventionally, the transmission clutch is applied to the positive clutch method. The positive clutch method refers to a method in which the clutch is separated by the hydraulic release when neutral, and the clutch is coupled by the hydraulic supply being performed when moving forward and backward.

Therefore, the hydraulic pressure on the forward and reverse clutch assembly is released when the shift is neutral, and the clutch piston is separated from the clutch pack by the elastic restoring force of the spring, so that the engine power is cut off, and the hydraulic pressure is supplied to the forward or reverse clutch assembly when shifting forward and backward. At the same time, the clutch piston is pressed against the clutch pack by hydraulic pressure, and the engine power is transmitted to the wheel.

In this way, when the positive clutch method is applied to the clutch of the transmission, since the hydraulic pressure is continuously supplied during the forward and backward movement, its own parking function cannot be realized, and eventually, a separate parking device must be installed, thus increasing the number of parts and increasing the weight as described above. Including the manufacturing cost increases.

Accordingly, an object of the present invention is to provide an auto parking system for an industrial vehicle and construction equipment that enables the structure of a vehicle braking system to be simplified and to reduce the manufacturing cost of an industrial vehicle.

Auto parking system for an industrial vehicle and construction equipment according to an embodiment of the present invention is a forward side solenoid valve for blocking and applying the transfer of the forward clutch, reverse clutch, the working fluid for the operation of the forward clutch, the reverse Reversing solenoid valve for blocking and applying the transfer of the working fluid for the operation of the clutch unit, a charging pump for supplying the working fluid in the direction of the forward clutch and the reverse clutch, the working fluid and the working fluid supplied from the charging pump A transmission part including a main pressure valve for supplying hydraulic pressure to the forward side solenoid valve and the reverse side solenoid valve; A parking switch installed in the interior of the vehicle and configured to switch the vehicle to the parking mode; An accelerator pedal switch connected to an accelerator pedal installed inside the vehicle and detecting whether the accelerator pedal is operated; A brake pedal switch connected to the brake pedal installed in the vehicle and detecting whether the brake pedal is operated; Shift control unit for operating the forward / neutral / reverse shift stage; A speed sensor connected to the axle of the vehicle and detecting the vehicle speed; And a transmission control unit connected to the parking switch, the shift control unit, the forward side solenoid valve and the reverse side solenoid valve, the accelerator pedal switch, and the brake pedal switch, and when the parking switch is set ON If the brake pedal switch is on and the current vehicle speed input from the speed sensor 300 is 0km, the forward clutch and the reverse clutch are set by turning off the forward solenoid valve and the reverse solenoid valve. By means of which the supply of the hydraulic fluid to the working fluid and the working fluid is cut off so that the forward clutch part and the reverse clutch part are connected to the axle part of the vehicle; When the brake pedal switch is in the off state and the accelerator pedal switch is in the on state, the transmission control unit is configured to turn on one of the forward side solenoid valve and the reverse side solenoid valve according to the shift stage position of the shift operation unit. The supply of the working fluid and the working fluid is applied to the forward clutch portion or the reverse clutch portion is characterized in that the forward clutch portion or the reverse clutch portion is controlled to be disconnected from the axle portion of the vehicle.

In one embodiment, the transmission control unit, a control board configured with a control circuit on the substrate; A lower case accommodating the control board therein; A connector electrically connected to the control circuit and electrically connecting the control circuit to the parking switch, the accelerator pedal switch, the brake pedal switch, the forward side solenoid valve and the reverse side solenoid valve; An upper case coupled to an open surface of the lower case and having a connector hole for accommodating the connector and exposing the connector to the outside; And it may include a sealing member interposed between the coupling portion of the upper case and the lower case.

Auto parking system for an industrial vehicle and construction equipment according to another embodiment of the present invention is a transmission inspection indicator installed inside the vehicle; And an inner space into which the working fluid flows from the forward clutch portion or an inner space into which the working fluid flows from the reverse clutch portion, and which is supplied into the inner space of the forward clutch portion or the inner space of the reverse clutch portion. 10% of the fluid pressure increases the pressure change of the inner space of the forward clutch portion or the inner space of the reverse clutch portion by the increase of the pressure from 0 to 100% with respect to 100% of the inner space of the forward clutch portion or the inner space of the reverse clutch portion. And a pressure measuring sensor which is set to output a pressure measuring value for each section when increased in units; The transmission control unit receives a pressure measurement value for each section output from the pressure measuring sensor, and a current vehicle speed value measured at the speed detection sensor and each section at a time when the pressure measurement value for each section is input. A transmission unit storing a transmission check data matched to each pressure measurement value and a timer counting a time, and a transmission check period for executing the transmission check based on the transmission check data stored in the storage unit is preset; ; The transmission control unit stores the transmission inspection data in the storage unit at least once per day, and the transmission control unit includes a forward clutch unit or a reverse clutch unit connected to the axle unit with the parking switch turned off. In the process of controlling the connection to be disconnected, the storage unit stores the vehicle speed value matched with the pressure measurement value for each section and the pressure measurement value for each section, and then determines whether the current time point is the transmission inspection period, and the transmission In the inspection period, it is determined whether the previous transmission check data and the latest transmission check data are different by comparing the previous transmission check data checked in the previous transmission check cycle with the latest transmission check data checked in the current transmission check cycle. If the latest transmission inspection data is different It may execute a control to emit a light transmission inspection.

The auto parking system for an industrial vehicle and construction equipment according to another embodiment of the present invention further includes a cooling member accommodated in the lower case to contact the control board to cool the control board that generates heat. The lower case includes a coupling slot provided in an inner space of the lower case for coupling the cooling member, and the cooling member is a cooling fluid receiving chamber having an hexahedron shape having an upper surface open. A first flow path wall extending a predetermined length from a first side portion of the chamber toward the second side portion facing the first side portion, a predetermined length extending from the second side portion toward the first side portion and spaced apart from the first flow path wall; And a second flow path wall spaced apart from each other, wherein the first flow path wall and the second flow path wall are alternately arranged in one direction. Cooling fluid receiving chamber in the flow path of a zigzag shape is formed in the inner space of the cooling fluid receiving chamber; A metal plate having a rectangular plate shape, the metal plate is seated on upper end portions of the first flow path wall and the second flow path wall, and is accommodated in an inner space of the cooling fluid receiving chamber, and is directed from an upper surface of the metal plate to an inner space of the cooling fluid receiving chamber. A board cooling plate including a heat dissipation portion which protrudes concavely and is disposed between the first flow path wall and the second flow path wall, and has a heat trapping space which protrudes in a conical shape and is open toward the upper surface of the metal plate; A fluid circulation pipe connected to an inlet part located at one end of the entire length of the flow path and an outlet part located at the other end of the entire length of the flow path for circulating a cooling fluid, and installed on the fluid circulation pipe to provide the cooling fluid. And a fluid circulation pump including a fluid circulation pump driven to circulate through the flow path and the fluid circulation pipe, and a heat exchanger installed on the fluid circulation pipe to exchange heat with the fluid discharged from the outlet. It is seated on the upper surface of the board cooling plate to be in close contact with the board cooling plate and accommodated in the cooling fluid receiving chamber, and the open portion of the heat collecting space captures heat emitted from the control board that is heated to face the control board. The heat dissipation unit may be immersed in the cooling fluid supplied to the flow path and cooled by the cooling fluid. .

According to the auto parking system for industrial vehicles and construction equipment according to the present invention, the parking control switch is turned on / off and the transmission control unit connects the forward clutch part and the reverse clutch part to the axle part at the same time according to the on / off setting of the parking switch. Since this is implemented or configured to release parking, a separate mechanical parking only device can be omitted. Accordingly, there is an advantage that the structure of the braking system of the vehicle can be simplified and the manufacturing cost of the industrial vehicle can be reduced.

1 is a block diagram conceptually showing the configuration of an auto parking system for an industrial vehicle and construction equipment according to an embodiment of the present invention.

2A and 2B are cross-sectional views and perspective views illustrating a configuration of a forward clutch unit and a reverse clutch unit of a transmission control unit of an auto parking system for an industrial vehicle and construction equipment according to an embodiment of the present invention.

Figure 3 is an exploded perspective view for explaining the configuration of the transmission control unit of the auto parking system for industrial vehicles and construction equipment according to an embodiment of the present invention.

4 is a flowchart illustrating a process of implementing an auto parking function by the auto parking system for an industrial vehicle and construction equipment according to an embodiment of the present invention.

5 is a block diagram conceptually showing a configuration of an auto parking system for an industrial vehicle and construction equipment according to another embodiment of the present invention.

6 is a flowchart illustrating a process of displaying and checking transmission transmission by an auto parking system for an industrial vehicle and construction equipment according to another exemplary embodiment of the present invention.

7 is an exploded perspective view illustrating an auto parking system for an industrial vehicle and construction equipment according to another embodiment of the present invention.

8 is a perspective view illustrating a fluid circulation means of an auto parking system for an industrial vehicle and construction equipment according to another embodiment of the present invention.

FIG. 9 is a cross-sectional view illustrating a board cooling plate and a control board in a cooling water chamber of an auto parking system for an industrial vehicle and construction equipment according to another exemplary embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the auto parking system for industrial vehicles and construction equipment according to an embodiment of the present invention. As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the drawings, similar reference numerals are used for similar elements. In the accompanying drawings, the dimensions of the structures are shown in an enlarged scale than actual for clarity of the invention.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described on the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

1 is a block diagram conceptually showing the configuration of an auto parking system for an industrial vehicle and construction equipment according to an embodiment of the present invention, Figures 2a and 2b is for an industrial vehicle and construction equipment according to an embodiment of the present invention 3 is a cross-sectional view and a perspective view for explaining the configuration of a forward clutch unit and a reverse clutch unit of a transmission control unit of an auto parking system, and FIG. 3 is a view illustrating a configuration of a transmission control unit of an auto parking system for an industrial vehicle and construction equipment according to an embodiment of the present invention. It is an exploded perspective view for explanation.

1 to 3, the auto parking system for an industrial vehicle and construction equipment according to an embodiment of the present invention includes a transmission part 100, a parking switch 200, an accelerator pedal switch 610, and a brake pedal switch ( 620, the shift operator 500, the speed sensor 300, and the transmission controller 400.

The transmission unit 100 includes a forward clutch unit 110, a reverse clutch unit 120, a forward side solenoid valve 130, a reverse side solenoid valve 140, a charging pump 150, and a main pressure valve 160. do.

The forward clutch unit 110 and the reverse clutch unit 120 are configured in a negative type and are configured identically to each other.

The forward clutch unit 110 and the reverse clutch unit 120 are arranged side by side while forming the same configuration in the forward and reverse first stage transmissions, and are installed between the engine power input side and the engine power output side that outputs engine power to the driving wheels.

First, the clutch shaft 10 is connected to the engine power input side.

The clutch shaft 10 has a hydraulic path 12 for supplying hydraulic pressure to one surface side of the clutch piston 30 therein, and the clutch drum 20 integrally formed at the outer diameter part to form a constant internal space. It is provided with a structure.

At this time, the clutch piston 30 is disposed in the one side space of the inner space of the clutch drum 20 to be able to move forward and backward.

The clutch piston 30 is driven by the hydraulic pressure coming into the hydraulic path 12 of the clutch shaft 10 and moves backward from the clutch pack 50, or the hydraulic pressure entering the hydraulic path 12 as described below. At the time of release, it moves forward by the elastic restoring force of the return spring 40 and at the same time serves to press the clutch pack 50.

The return spring 40 is compressively mounted between one side wall of the inner space of the clutch drum 20 and one surface of the clutch piston 30, and is compressed when the clutch piston 30 is reversed, and then the hydraulic path 12 When the hydraulic pressure flowing into the) is released to provide an elastic restoring force for pressing the clutch piston 30 toward the clutch pack (50).

The clutch pack 50 transmits power when the disk and the friction plate are closely coupled to each other, and blocks the power when separated from each other, and is disposed in the other space of the inner space of the clutch drum 20.

Thus, the clutch pack 50 is the reverse of the clutch piston 30 is separated from the clutch pack 50 by the pressure release of the clutch piston 30, that is, the hydraulic pressure entering the hydraulic path 12 of the clutch shaft 10. As soon as the movement is released, the engine is disconnected to cut off the engine power, while the clutch piston 30, which has received the elastic restoring force of the return spring 40 when the hydraulic pressure is released, is coupled to press the clutch pack 50 again to reduce engine power. It becomes the state to convey.

On the other hand, the clutch gear 60 is disposed at the other end of the clutch drum 20, the clutch gear 60 is connected to the clutch pack 50 and at the same time rotatable through the bearing on the clutch shaft 10 Is supported, and serves to output the engine power to the driving wheel when the clutch pack 50 is coupled.

In addition, a piston guide 14 is mounted on an outer diameter portion of the clutch shaft 10 adjacent to the clutch drum 20, and the piston guide 14 is in contact with the clutch piston 30 and the clutch piston 30. It plays a role of guiding the linear movement of forward and backward.

In addition, an output gear assembly 70 for changing the rotation direction is further connected to the clutch gear 60 of the reverse negative clutch assembly 200.

When the transmission fluid 100 and the hydraulic fluid are supplied to the forward clutch unit 110 and the reverse clutch unit 120, the transmission unit 100 blocks the forward driving or the backward driving according to the gear shift, and the forward clutch unit 110 and the reverse clutch When the supply of the working fluid and hydraulic pressure to the unit 120 is cut off, forward driving or reverse driving is applied according to the gear shift.

The forward side solenoid valve 130 blocks and applies the transfer of a working fluid for the operation of the forward clutch unit 110. To this end, the forward side solenoid valve 130 may open and close the hydraulic path of the forward clutch unit 110.

The reverse side solenoid valve 140 blocks and applies the transfer of the working fluid for the operation of the reverse clutch unit 120. To this end, the reverse side solenoid valve 140 may open and close the hydraulic path of the reverse clutch unit 120.

The charging pump 150 supplies the working fluid in the transmission toward the forward clutch unit 110 and the reverse clutch unit 120.

The main pressure valve 160 supplies the hydraulic fluid of the working fluid and the working fluid supplied from the charging pump 150 to the forward side solenoid valve 130 and the reverse side solenoid valve 140.

The parking switch 200 is installed in the vehicle's interior and switches the vehicle to the parking mode. When the parking switch 200 is set to ON, the parking mode is set. If the parking switch 200 is set to OFF, the parking mode is set to a releaseable state.

The shift control unit 500 is installed in the driver's seat of the vehicle and is adopted as a gear control lever capable of operating the forward / neutral / reverse shift stage. When the driver shifts to one of the forward / neutral / reverse shift stages, the corresponding shift stage signal is transmitted to the transmission control unit. Is sent to 400.

The accelerator pedal switch 610 is connected to an accelerator pedal installed in the vehicle to detect whether the accelerator pedal is operated. For example, the accelerator pedal switch 610 may output an on signal when the driver presses the accelerator pedal, and may output an off signal when the driver does not press the accelerator pedal.

The brake pedal switch 620 is connected to the brake pedal installed in the vehicle to detect whether the brake pedal is operated. For example, the brake pedal switch 620 may output an on signal when the driver presses the brake pedal and output an off signal when the driver does not press the brake pedal.

The speed sensor 300 is connected to the axle portion 70 of the vehicle to detect the vehicle speed. The axle portion 70 of the vehicle is connected to the output shaft of the transmission portion 100 is powered by the forward clutch portion 110 and the reverse clutch portion 120 of the transmission portion 100 to rotate the wheel of the vehicle It may include a reduction gear connected to the output shaft of the transmission unit 100 and the wheel of the vehicle. The speed sensor 300 may be connected to the axle unit 70 to detect the rotational speed of the wheel of the vehicle to detect the vehicle speed.

Transmission control unit 400 is connected to the speed sensor 300, the current vehicle speed is input from the speed sensor 300, the parking switch 200, the shift control unit 500, the forward side solenoid valve 130 And the reverse solenoid valve 140, the brake pedal switch 620, and the accelerator pedal switch 610 are electrically connected to each other. The transmission control unit 400 performs opening and closing operations of the forward side solenoid valve 130 and the reverse side solenoid valve 140 according to input signals from the parking switch 200, the brake pedal switch 620, and the accelerator pedal switch 610. To control.

If the brake pedal switch 620 is turned off and the accelerator pedal switch 610 is turned on, the transmission controller 400 may move the solenoid valve 130 and the reverse side according to the shift stage position of the shift operator 500. The supply of the working fluid and the working fluid is applied to the forward clutch unit 110 or the reverse clutch unit 120 which is turned on by setting any one of the side solenoid valves 140 to the forward clutch unit 110 or The reverse clutch unit 120 may be controlled to be disconnected from the axle unit 70 of the vehicle.

The transmission control unit 400 is installed inside one side of the vehicle. The transmission control unit 400 includes a control board 410, a lower case 420, a connector 440, an upper case 430, and a sealing member 450.

The control board 410 receives a signal from the parking switch 200, the accelerator pedal switch 610, the brake pedal switch 620, the accelerator pedal switch 610 on the substrate, the forward side solenoid valve 130 and the reverse side A control circuit for controlling the opening and closing of the solenoid valve 140 is configured on the substrate.

The lower case 420 accommodates the control board 410 therein. As an example, the lower case 420 may have a hexahedron shape in which a rectangular upper surface is opened, and the control board 410 may be inserted through the open upper surface.

The connector 440 is such that the control circuit is electrically connected to the parking switch 200, the accelerator pedal switch 610, the brake pedal switch 620, the forward side solenoid valve 130 and the reverse side solenoid valve 140. do. To this end, the connector 440 is provided on one side of the control board 410 and electrically connected to the control circuit, the parking switch 200, the accelerator pedal switch 610, the brake pedal switch 620, the forward side solenoid valve 130 and the reverse side solenoid valve 140 may be electrically connected through a cable having a connector.

The upper case 430 covers the open upper surface of the lower case 420 to protect the control board 410 accommodated in the lower case 420 from the outside. For example, the upper case 430 may have a quadrangular shape to cover the upper surface of the lower case 420, and a connector connection hole (not shown) may be provided at the center of the upper surface to expose the connector 440.

The sealing member 450 is interposed between the coupling parts of the upper case 430 and the lower case 420 to prevent foreign substances from flowing from the outside of the upper case 430 and the lower case 420.

Auto parking system for an industrial vehicle and construction equipment according to an embodiment of the present invention can be implemented when the forward clutch 110 and the reverse clutch 120 is connected to the axle unit 70 at the same time. . Hereinafter, a process of implementing the auto parking function will be described with reference to FIG. 4. 4 is a flowchart illustrating a process of implementing an auto parking function by the auto parking system for an industrial vehicle and construction equipment according to an embodiment of the present invention.

First, the transmission controller 400 determines whether a signal from the parking switch 200 is input while the vehicle is driving (S110).

When the signal from the parking switch 200 is input, the transmission controller 400 determines whether the signal from the brake pedal switch 620 is input and the speed measurement value input from the speed sensor 300 is 0 km. (S120).

When it is determined that the speed measurement value is 0 km, the transmission control unit 400 operates the forward clutch unit 110 and the reverse clutch unit 120 by setting the forward side solenoid valve 130 and the reverse side solenoid valve 140 to be off. Shut off the supply of hydraulic pressure of the fluid and the working fluid (S130).

According to this process, the output shaft of the forward clutch unit 110 and the reverse clutch unit 120 is simultaneously connected to the reduction gear of the axle unit 70, and the rotation of the reducer of the axle unit 70 by the forward clutch unit 110. Since the direction of rotation of the reduction gear of the axle portion 70 by the direction and the reverse clutch portion 120 are opposite to each other, the output of the forward clutch portion 110 and the reverse clutch portion 120 is simultaneously output to the reduction gear of the axle portion 70. When connected, the rotational force in the opposite direction to the reduction gear of the axle part 70 is applied to the axle part 70 is fixed without the rotation (fix), thereby the parking operation of the vehicle can be implemented.

In the process of releasing parking while the vehicle is parked as described above, the transmission control unit 400 determines whether an off signal is input from the parking switch 200 in the parking state (S140).

When the off signal is input from the parking switch 200, the transmission control unit 400 determines whether the signal from the accelerator pedal switch 610 is input and whether the off signal is input from the brake pedal switch 620 (S150). .

When it is determined that the signal from the accelerator pedal switch 610 is input and the off signal is input from the brake pedal switch 620, the transmission controller 400 drives the vehicle (S160). At this time, the transmission control unit 400 is set by turning on any one of the forward side solenoid valve 130 and the reverse side solenoid valve 140 according to the position of the shift lever (not shown) or the forward clutch unit 110 is set on. The supply of hydraulic fluid of the working fluid and the working fluid is applied to the reverse clutch unit 120 to control the forward clutch unit 110 or the reverse clutch unit 120 to be disconnected from the axle unit 70.

Auto parking system for an industrial vehicle and construction equipment according to an embodiment of the present invention is the transmission control unit 400 according to the on / off setting of the parking switch 200 and the on / off setting of the parking switch 200 forward clutch By connecting the unit 110 and the reverse clutch unit 120 to the axle unit 70 at the same time, the parking is implemented or the parking is released so that a separate mechanical parking only device may be omitted. Accordingly, there is an advantage that the structure of the braking system of the vehicle can be simplified and the manufacturing cost of the industrial vehicle can be reduced.

Hereinafter, an auto parking system for an industrial vehicle and construction equipment according to another embodiment of the present invention will be described with reference to FIGS. 5 and 6 to focus on differences between the auto parking system for an industrial vehicle and construction equipment according to an embodiment of the present invention. Explain. 5 is a block diagram conceptually illustrating a configuration of an auto parking system for an industrial vehicle and construction equipment according to another embodiment of the present invention, and FIG. 6 is an auto parking system for an industrial vehicle and construction equipment according to another embodiment of the present invention. Is a flowchart illustrating a process of displaying transmission check and auto parking by the controller.

Referring to FIG. 5, an auto parking system for an industrial vehicle and construction equipment according to another exemplary embodiment of the present invention may further include a transmission check indicator 800 and a pressure measuring sensor 900. Since the same as the configuration of the automatic parking system for industrial vehicles and construction equipment according to the embodiment will be described below with reference to the transmission check indicator 800 and the pressure measuring sensor 900.

Transmission check indicator 800 is installed inside the vehicle. For example, the transmission check indicator 800 may be an LED configured to emit red light.

The pressure measuring sensor 900 is connected to an internal space into which the working fluid flows from the forward clutch unit 110 or an internal space into which the working fluid flows from the reverse clutch unit 120, and the forward clutch unit 110 is connected to the internal space. The pressure change of the internal space of the forward clutch portion 110 or the internal space of the reverse clutch portion 120 by the increase of the pressure of the working fluid supplied to the internal space of the reverse clutch portion 120 or the To output the pressure measurement value for each section when the fluid pressure increased from 0 to 100% with respect to 100% of the internal space of the forward clutch 110 or the internal space of the reverse clutch 120 in 10% increments. Is set. That is, the pressure measuring sensor 900 may output the pressure measurement value 10%, the pressure measurement value 20%, the pressure measurement value 20%, the pressure measurement value 30%, ㅇ ㅇ the pressure measurement value 100% when the fluid pressure increases at intervals of 10%. In addition, the pressure measurement values output at the time intervals increased by 10% mean the pressure measurement values for each section. For example, the pressure measuring sensor 900 may be connected to the internal space of the clutch drum 20 of the forward clutch unit 110.

The transmission controller 400 may receive a pressure measurement value for each section output from the pressure measuring sensor 900, and may further include a storage unit 460 and a timer 470.

The storage unit 460 checks the transmission in which the current vehicle speed value measured by the speed sensor 300 and the pressure measurement value for each section are matched when the pressure measurement value for each section is input to the transmission control unit 400. The data is saved. For example, the storage unit 460 may be configured in the control board 410 of the transmission control unit 400, and may be in the form of RAM.

The timer 470 counts time and may be provided to count when the transmission inspection data is stored in the storage unit 460, for example, a date when the transmission inspection data is stored.

In addition, the transmission control unit 400 is previously set a transmission check period for executing the transmission check based on the transmission check data stored in the storage unit 460, and transmits the transmission check data to the storage unit 460 at least once per day. Can be set to save. For example, the transmission control unit 400 may store the transmission check data in the storage unit 460 at a predetermined time of day. For example, the transmission inspection period may be set to a time point in which the transmission inspection data for one week is stored, and in this case, the latest transmission inspection cycle may be the seventh time point counting the day after the previous transmission inspection period as the first day. have.

In addition, the transmission control unit 400 is the forward clutch unit 110 or the reverse clutch unit 120 is connected to the axle unit 70 is turned off the parking switch 200 is set during the process of the auto parking. In the process of controlling the axle unit 70 to be disconnected, the storage unit 460 stores the vehicle speed value matched with the pressure measurement value for each section and the pressure measurement value for each section, and then the current time is the transmission. If it is a check cycle, and if the transmission check cycle, the previous transmission check data checked in the previous transmission check cycle and the latest transmission check data checked in the current transmission check cycle are compared to determine whether the previous transmission check data and the latest transmission check data are different. And determining whether the previous transmission check data and the latest transmission check data are different from each other. It can be performed.

Hereinafter, the process of implementing the auto parking function by the auto parking system for industrial vehicles and construction equipment according to another embodiment of the present invention is the same as the auto parking system for industrial vehicles and construction equipment according to the embodiment of the present invention. 6 will be described with reference to FIG. 6 with a focus on a process of indicating whether a transmission inspection by an automatic parking system for an industrial vehicle and construction equipment according to another embodiment of the present invention is performed.

The process of displaying whether the transmission inspection is necessary may include: axle unit 70 during a control process of the auto parking function described with reference to FIG. 4 in the description of the auto parking system for an industrial vehicle and construction equipment according to an embodiment of the present invention. The forward clutch unit or the reverse clutch unit connected to the control unit is executed at step S160 to control the spaced apart from the axle unit.

Referring to Figure 6, the process of indicating whether the transmission check required, the forward side solenoid valve 130 or the reverse side solenoid valve 140 is opened so that the pressure of the working fluid is forward clutch portion 110 or reverse clutch portion. When input to 120, the transmission control unit 400 stores the vehicle speed value matching the pressure measurement value for each section and the pressure measurement value for each section in the storage unit 460 (S161).

Subsequently, it is determined whether the current time point is the transmission inspection cycle (S162).

Subsequently, in the transmission check period, the previous transmission check data in the storage unit 460 identified in the previous transmission check period and the current transmission check period checked in the storage unit 460 are compared, that is, the recently updated transmission inspection data, It is determined whether the previous transmission check data and the latest transmission check data are different (S163).

Subsequently, if the previous transmission check data and the latest transmission check data are different, the transmission control unit 400 emits the transmission check light 800 (S164). At this time, when the transmission control unit 400 compares the previous transmission check data and the latest transmission check data, the vehicle speed value corresponding to the pressure measurement value for each section in each transmission check data is higher than the previous transmission check data in the latest transmission check data. If it is confirmed that it is low, it is determined that the previous transmission check data and the latest transmission check data are different.

Auto parking system for industrial vehicles and construction equipment according to another embodiment of the present invention measures the pressure measurement value of the working fluid supplied to the forward clutch unit 110 or the reverse clutch unit 120 according to a predetermined schedule and When the pressure measurement value is measured, the current vehicle speed value measured may be checked at regular intervals to determine whether the latest vehicle speed value is lower than the previous vehicle speed value.

Here, the recent measurement of the vehicle speed value lower than the previous vehicle speed value means that the speed of the vehicle is lowered. That is, the recent decrease in the vehicle speed value is because the vehicle speed is lowered because the vehicle is not accelerated rapidly due to a slow shift process. Therefore, the shift speed of the vehicle is lowered due to the fluid supply means such as the charging pump 150 and the main pressure valve 160 for supplying the working fluid to the forward clutch 110 or the reverse clutch 120. It means that the performance of the fluid supply means, largely the performance of the transmission unit 100 in a state in which the supply is not smooth.

Therefore, when the auto parking system for industrial vehicles and construction equipment according to another embodiment of the present invention is used, the driver can easily confirm that the acceleration power of the vehicle is lowered in the process of accelerating the vehicle again after the auto parking, and the acceleration power of the vehicle is increased. The driver can immediately check the vehicle while the vehicle is running through the transmission check indicator 800 for the lowered state. Accordingly, the driver immediately recognizes a state in which the acceleration force of the vehicle is lowered, thereby quickly performing maintenance of the transmission unit 100. There is an advantage to this.

Hereinafter, an auto parking system for an industrial vehicle and construction equipment according to another embodiment of the present invention will be described with reference to FIGS. 7 to 9 from the auto parking system for an industrial vehicle and construction equipment according to an embodiment of the present invention. The explanation is centered. 7 is an exploded perspective view illustrating an auto parking system for an industrial vehicle and construction equipment according to another embodiment of the present invention, and FIG. 8 is an auto parking system for an industrial vehicle and construction equipment according to another embodiment of the present invention. 9 is a cross-sectional view illustrating a board cooling plate and a control board in a cooling water chamber of an auto parking system for an industrial vehicle and construction equipment according to another embodiment of the present invention. .

7 to 9, in the auto parking system for an industrial vehicle and construction equipment according to another embodiment of the present invention, the transmission control unit 400 cools the control board 410 in which the lower case ( 420 is the same as the auto parking system for industrial vehicles and construction equipment according to an embodiment of the present invention except that it further includes a cooling member 700 accommodated inside the contact with the control board 410 It will be described with respect to the cooling member 700.

The cooling member 700 includes a cooling fluid receiving chamber 710, a board cooling plate 720, and a fluid circulation means 730.

The cooling fluid accommodating chamber 710 has an hexahedron shape having an open top surface, and includes a first flow path wall 711 and a second flow path wall 712.

The first flow path wall 711 extends from the first side portion 710a of the cooling fluid receiving chamber 710 toward the second side portion 710b facing the first side portion 710a. At this time, the ends of the first flow path wall 711 facing the second side surface portion 710b are spaced apart without contacting the second side surface portion 710b.

The second flow path wall 712 extends from the second side surface part 710b toward the first side surface part 710a and is spaced apart from the first flow path wall 711 by a predetermined distance. At this time, the end of the second flow path wall 712 facing the first side portion 710a is also spaced apart without contacting the first side portion 710a.

The first flow path wall 711 and the second flow path wall 712 are alternately arranged in a direction perpendicular to the longitudinal direction of the first flow path wall 711 and the second flow path wall 712 to form a cooling fluid receiving chamber ( A zigzag-shaped flow path 713 is formed in the inner space of the 710, and the height of the first flow path wall 711 and the second flow path wall 712 is the height of the first side portion 710a and the second side portion 710b. Formed lower.

The board cooling plate 720 is a metal plate forming a square plate shape. The board cooling plate 720 is seated on the upper end of the first flow path wall 711 and the second flow path wall 712 is accommodated in the interior space of the cooling fluid receiving chamber 710.

In addition, the board cooling plate 720 includes a heat dissipation unit 721. The heat dissipation part 721 is concavely protruded from the upper surface of the board cooling plate 720 in the direction of the inner space of the cooling fluid receiving chamber 710 and is located between the first flow path wall 711 and the second flow path wall 712. It protrudes in a conical shape and has a heat collecting space 721a open in the direction of the upper surface of the board cooling plate 720 inside. The heat dissipation unit 721 is cooled by being immersed in the cooling fluid supplied to the flow path 713 in the cooling fluid receiving chamber 710.

The control board 410 is located on the upper surface of the board cooling plate 720 so that the control board 410 is accommodated in the cooling fluid receiving chamber 710, wherein the control board 410 and the board cooling plate 720 The heat dissipating part 721 heats up the space collected from the control board 410 when the control board 410 is heated and the open portion of the heat collecting space 721a is opposed to the control board 410. Can be captured via).

The fluid circulation means 730 circulates the cooling fluid in the flow path 713 formed in the cooling fluid receiving chamber 710. The fluid circulation means 730 includes a fluid circulation tube 731, a fluid circulation pump 732, and a heat exchanger 733.

The fluid circulation tube 731 is connected to an inlet portion 7131 located at one end of the entire length of the flow path 713 and an outlet portion 7122 located at the other end of the entire length of the flow path 713 to circulate the cooling fluid. Let's do it.

The fluid circulation pump 732 is installed on the fluid circulation tube 731 and is driven to circulate the cooling fluid to the flow path 713 and the fluid circulation tube 731.

It is installed on the fluid circulation pipe 731 and heat-exchanges with the fluid discharged from the outlet portion 7142 to cool the cooling fluid of which the temperature is increased.

The fluid circulation means 730 is disposed outside the cooling fluid receiving chamber 710 and is accommodated in the lower case 420 together with the cooling fluid receiving chamber 710.

Auto parking system for industrial vehicles and construction equipment according to another embodiment of the present invention is the heat generated by the outside air in the closed space inside the upper case 430 and the lower case 420 and the heat generated by performing repeated control It is possible to quickly cool the control board 410 of the transmission control unit 400 generated by heat.

That is, for cooling the control board 410, the cooling fluid circulates through the flow path 713 and the fluid circulation tube 731 formed in the cooling fluid receiving chamber 710. At this time, the cooling fluid is pumped and circulated by the fluid circulation pump 732, the cooling fluid introduced through the fluid circulation pipe 731 at the inlet portion 7141 of the flow path 713 is the inlet portion ( It moves from 7131 to the exit portion 7252 in a zigzag.

When the cooling fluid moves along the flow path 713, the board cooling plate 720 is cooled to a temperature lower than the temperature inside the lower case 420 and the upper case 430 by the cooling fluid, and the cooled board cooling plate 720 The heat generated control board 410 is cooled by the cooled board cooling plate 720.

In addition, the heat generated control board 410 emits heat to the surroundings, wherein the heat emitted from the control board 410 is formed in the board cooling plate 720, the heat radiating portion facing the open portion on the control board 410 The heat dissipation part 721 is rapidly cooled because the heat dissipation part 721 is introduced into the heat collecting space 721a of the 721 and is collected, and the heat dissipation part 721 is submerged in the cooling fluid moving along the flow path 713.

Therefore, the control board 410 contacts the surface of the board cooling plate 720 to exchange heat with the board cooling plate 720, and collects heat emitted from the control board 410 to radiate the collected heat to the heat dissipation unit 721. ), The control board 410 can be cooled quickly.

On the other hand, the cooling fluid discharged from the outlet portion 7122 of the flow path 713 is discharged in a state in which the temperature rises by heat exchange with the control board 410, and the cooling fluid whose temperature rises flows into the internal passage of the fluid circulation pipe 731. The cooling fluid is moved in the direction of the heat exchanger, the temperature of the fluid flowing into the inner passage of the fluid circulation pipe 731 is increased in the heat exchanger (733) to be cooled. The cooled fluid is pumped by the fluid circulation pump 732 and then moved to the inlet portion 7141 of the flow path 713 through the fluid circulation pipe 731 to be supplied to the flow path 713, and to the flow path 713. The supplied cooling fluid again moves along the flow path 713 in the direction of the outlet portion 7142 of the flow path 713.

The control board 410 of the transmission control unit 400 can be cooled quickly at all times through the circulation process of the fluid, so that the heating and the high ambient temperature due to the repeated control of the transmission control unit 400 being performed during the operation of the industrial vehicle. The transmission control unit 400 may maintain a stable temperature without heat at all times even in an environment such as heat generation according to FIG. 1, thereby preventing failure and control error of the transmission control unit 400 due to heat generation of the transmission control unit 400. In addition, there is an advantage that can prevent a safety accident due to an operation error while driving the industrial vehicle.

On the other hand, the outer case of the lower case 420 and the upper case 430 of the transmission control unit 400 of the auto parking system for industrial vehicles and construction equipment according to the embodiments of the present invention effectively prevents the removal and removal of contaminants An antifouling coating layer coated with an antifouling coating composition may be formed to achieve this.

The antifouling coating composition includes alkanolamide and ampopropionate in a molar ratio of 1: 0.01 to 1: 2, and the total content of alkanolamide and ampopropionate is 1 to 10 based on the total aqueous solution. Weight percent.

The alkanolamide and ampopropionate have a molar ratio of 1: 0.01 to 1: 2, and when the molar ratio is out of the above range, the coating property of the substrate decreases or the moisture adsorption of the surface after application increases the coating film. There is a problem that is eliminated.

The alkanolamide and ampopropionate have a problem in that 1 to 10% by weight of the total composition aqueous solution is preferred. If the content is less than 1% by weight, the applicability of the substrate is lowered. Precipitation is likely to occur due to an increase.

On the other hand, it is preferable to apply | coat by the spray method as a method of apply | coating this antifouling coating composition on a base material. The final coating film thickness on the substrate is preferably 500 to 2000 kPa, more preferably 1000 to 2000 kPa. If the thickness of the coating film is less than 500 kPa, there is a problem of deterioration in the case of high temperature heat treatment, and if the thickness of the coating film exceeds 2000 kPa, crystal precipitation of the coated surface is liable to occur.

In addition, the present antifouling coating composition may be prepared by adding 0.1 mol of alkanolamide and 0.05 mol of ampopropionate to 1000 ml of distilled water, followed by stirring.

On the other hand, the anti-corrosion coating layer is formed on the surface of the clutch shaft 10 of the transmission unit 100 of the auto parking system for industrial vehicles and construction equipment according to the embodiments of the present invention. The surface coating material for forming the anti-corrosion coating layer is composed of 20% by weight of toil triazole, 15% by weight of benzimidazole, 10% by weight of trioctylamine, 15% by weight of hafnium, 40% by weight of aluminum oxide. It consists of 8 micrometers.

Tolyltriazole, benzimizol and trioctylamine serve as corrosion protection and discoloration prevention.

Hafnium is a corrosion-resistant transition metal element that serves to have excellent water resistance and corrosion resistance.

Aluminum oxide is added for the purpose of fire resistance, chemical stability, and the like.

The reason for limiting the numerical value and the coating thickness of the components as described above, the inventors analyzed through the test results several times, showed the optimum corrosion protection effect in the ratio.

Therefore, it is possible to prevent the phenomenon that the outer surface of the clutch shaft is corroded by the anti-corrosion coating layer, thereby extending the life of the product.

On the other hand, the sealing member 450 of the transmission control unit 400 of the auto parking system for industrial vehicles and construction equipment according to embodiments of the present invention may be made of a rubber material, the raw material content ratio of the sealing member 450 60 weight% of rubber, 33 to 36 weight% of carbon black, 2 to 5 weight% of antioxidant, and 1 to 3 weight% of sulfur as an accelerator are mixed.

Carbon black is added to increase the wear resistance, but if the content is less than 33% by weight, the elasticity and wear resistance is reduced, when the content exceeds 36% by weight, the rubber content of the main component is relatively small, there is a fear that the elastic force is lowered , 33 to 36% by weight.

Antioxidants add 2 ~ 5% by weight by selecting 3C (N-PHENYL-N'-ISOPROPYL-P-PHENYLENEDIAMINE) or RD (POLYMERIZED 2,2,4-TRIMETHYL-1,2-DIHYDROQUINOLINE) If it is less than the weight%, the product is easy to oxidize, and if it is added too much, if it exceeds 5 weight%, the rubber content of the main component is relatively small, and the elastic force may be reduced. ~ 5% by weight is appropriate.

Sulfur, an accelerator, is mixed with 1-3 wt%. Since less than 1% by weight of the vulcanization effect in the heating step during molding is minimal, 1% by weight or more is added. If it exceeds 3% by weight, the content of rubber, which is a main component, is relatively low, so that the elastic force may drop, and 1 to 3% by weight is appropriate.

Therefore, since the present invention is reinforced with synthetic rubber having elasticity in various directions, the elasticity, toughness, and rigidity of the sealing member 450 are increased, so that durability is improved, and thus, the life of the sealing member 450 is increased.

In addition, the shift operation unit 500 is coated with a fragrance material having a function such as respiratory disease treatment, thereby exhibiting effects such as fatigue recovery of the user, health promotion.

The fragrance material may be mixed with a functional oil, the mixing ratio of the fragrance is 95 to 97% by weight of the functional oil is mixed 3 to 5% by weight, the functional oil 50% by weight of Tangerine (Tangerine oil), palmitore It consists of 50% by weight of palmitoleic acid oil.

The functional oil is preferably 3 to 5% by weight relative to the perfume. If the mixing ratio of the functional oil is less than 3% by weight, the effect is insignificant. If the mixing ratio of the functional oil is more than 3 to 5% by weight, the function thereof is not greatly improved while the manufacturing cost is greatly increased.

Tangerine oil among functional oils include citronellol, linalool and cital as main chemicals, and it is effective in relieving stress through antiseptic, antispasmodic and sedative effects.

Palmitoleic acid oil is an antioxidant that is good for dry or aged skin and has excellent effects on cell regeneration, sterilization and skin inflammation treatment.

As the functional oil is coated on the shift operation unit 500, it serves to contribute to worker fatigue, health promotion, and the like.

The description of the presented embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the invention. Thus, the present invention should not be limited to the embodiments set forth herein but should be construed in the broadest scope consistent with the principles and novel features set forth herein.

Claims

Forward clutch unit 110, reverse clutch unit 120, the forward side solenoid valve 130 for blocking and applying the transfer of the working fluid for the operation of the forward clutch unit 110, the reverse clutch unit 120 Reverse side solenoid valve 140 for blocking and applying the transfer of the working fluid for the operation of the charging pump 150 for supplying the working fluid toward the forward clutch unit 110 and the reverse clutch unit 120, Transmission unit 100 including a main pressure valve 160 for supplying the hydraulic fluid of the working fluid and the working fluid supplied from the charging pump 150 to the forward side solenoid valve 130 and the reverse side solenoid valve 140 ;

A parking switch 200 installed in the interior of the vehicle and for converting the vehicle into the parking mode;

An accelerator pedal switch 610 connected to an accelerator pedal installed inside the vehicle and detecting whether the accelerator pedal is operated;

A brake pedal switch 620 connected to a brake pedal installed inside the vehicle and detecting whether the brake pedal is operated;

A shift operator 500 for forward / neutral / reverse shift stage manipulation;

A speed detection sensor 300 connected to the axle portion 70 of the vehicle to detect a vehicle speed; And

A transmission control unit connected to the parking switch 200, the shift control unit 500, the forward side solenoid valve 130, and the reverse side solenoid valve 140, an accelerator pedal switch 610, and a brake pedal switch 620. 400),

When the parking switch 200 is set to ON, the transmission controller 400 moves forward when the brake pedal switch 620 is turned on and the current vehicle speed input from the speed sensor 300 is 0 km. By supplying the side solenoid valve 130 and the reverse side solenoid valve 140 to the OFF (off) supply of the hydraulic pressure of the working fluid and the working fluid to the forward clutch unit 110 and the reverse clutch unit 120 is blocked The forward clutch unit 110 and the reverse clutch unit 120 is controlled to be connected to the axle unit 70 of the vehicle,

When the brake pedal switch 620 is in the off state and the accelerator pedal switch 610 is in the transmission control unit 400, the transmission-side solenoid valve 130 and the shift side of the shift control unit 500 are located. Supply of the working fluid and the working fluid is applied to the forward clutch unit 110 or the reverse clutch unit 120 which is turned on by setting any one of the reverse side solenoid valves 140 to the forward clutch unit 110. Or, the reverse clutch unit 120 is characterized in that configured to control to be disconnected from the axle unit 70 of the vehicle,

Auto parking system for industrial vehicles and construction equipment.
The method of claim 1,

The transmission control unit 400,

A control board 410 configured with a control circuit on the substrate;

A lower case 420 accommodating the control board therein;

Electrically connected to the control circuit, and the control circuit is connected to the parking switch 200, the accelerator pedal switch 610, the brake pedal switch 620, the forward side solenoid valve 130 and the reverse side solenoid valve 140. A connector 440 for electrically connecting;

An upper case 430 coupled to an open surface of the lower case 420 and having a connector hole for receiving the connector 440 and exposing the connector 440 to the outside; And

Characterized in that it comprises a sealing member 450 interposed between the coupling portion of the upper case 430 and the lower case 420,

Auto parking system for industrial vehicles and construction equipment.
The method of claim 2,

The transmission control unit 400 further includes a cooling member 700 accommodated in the lower case 420 to be in contact with the control board 410 to cool the control board 410 that generates heat.

The lower case 420 includes a coupling slot 421 provided in the inner space of the lower case 420 to be coupled to the cooling member 700,

The cooling member 700,

A cooling fluid receiving chamber 710 having an open hexahedral shape having an upper surface, and a second side portion 710b facing the first side portion 710a from the first side portion 710a of the cooling fluid receiving chamber 710. The first flow path wall 711 extending in a predetermined length toward the first side wall portion 710a extends a predetermined length toward the first side wall portion 710a and is spaced apart from the first flow path wall 711 by a predetermined distance. And a second flow path wall 712, wherein the first flow path wall 711 and the second flow path wall 712 are alternately arranged in one direction so as to have a zigzag flow path in an internal space of the cooling fluid receiving chamber 710. Cooling fluid receiving chamber 710 is formed;

It is a metal plate forming a rectangular plate shape, is seated on the upper end of the first flow path wall 711 and the second flow path wall 712 is accommodated in the interior space of the cooling fluid receiving chamber 710, from the upper surface of the metal plate Protruded concave in the direction of the inner space of the cooling fluid receiving chamber 710 is located between the first flow path wall 711 and the second flow path wall 712 is projected in a conical shape is opened in the direction of the upper surface of the metal plate A board cooling plate 720 including a heat dissipation unit 721 having a heat collecting space 721a;

A fluid circulation tube connected to an inlet portion 7141 located at one end of the entire length of the flow path 713 and an outlet portion 7122 located at the other end of the entire length of the flow path 713 to circulate the cooling fluid ( 731, a fluid circulation pump 732 installed on the fluid circulation pipe 731 and driven to circulate the cooling fluid to the flow path 713 and the fluid circulation pipe 731, and the fluid circulation pipe 731. And a fluid circulation means 730 installed on the) and including a heat exchanger 733 for exchanging heat with the fluid discharged from the outlet portion 7142.

The control board 410 is mounted on the upper surface of the board cooling plate 720 to be in close contact with the board cooling plate 720 is accommodated in the cooling fluid receiving chamber 710,

The open portion of the heat collecting space 721a collects heat emitted from the control board 410 which is heated to face the control board 410,

The heat dissipation unit 721 is submerged in the water of the cooling fluid supplied to the flow path 713 is characterized in that the cooling by the cooling fluid

Auto parking system for industrial vehicles and construction equipment.
The method of claim 1,

A transmission check indicator 800 installed inside the vehicle; And

An internal space into which the working fluid flows from the forward clutch unit 110 or an internal space into which the working fluid flows from the reverse clutch unit 120 is connected to the internal space of the forward clutch unit 110 or the reverse clutch. The pressure change of the internal space of the forward clutch unit 110 or the internal space of the reverse clutch unit 120 by the increase of the pressure of the working fluid supplied to the internal space of the unit 120 of the forward clutch unit 110 Pressure measuring sensor 900 is set to output a pressure measurement value for each section when the fluid pressure increases from 0 to 100% in 10% increments with respect to 100% of the internal space of the internal space or the reverse clutch 120 (900). Further comprises;

The transmission control unit 400 receives the pressure measurement value for each section output from the pressure measurement sensor 900 and measures the speed detection sensor 300 at a time when the pressure measurement value for each section is input. And a storage unit 460 for storing the transmission check data in which the current vehicle speed value and the pressure measurement value of each section are matched, and a timer 470 for counting time, and the transmission stored in the storage unit 460. A transmission inspection period for executing the transmission inspection on the basis of the inspection data is set in advance;

The transmission control unit 400 stores the transmission inspection data in the storage unit 460 at least once for each day of the week,

In the transmission control unit 400, the parking switch 200 is turned off so that the forward clutch unit 110 or the reverse clutch unit 120 connected to the axle unit 70 is disconnected from the axle unit 70. In the process of controlling so as to, the storage unit 460 stores the vehicle speed value matching the pressure measurement value for each section and the pressure measurement value for each section, and then determine whether the current time point is the transmission inspection period, In the transmission check cycle, the previous transmission check data compared with the previous transmission check data checked in the previous transmission check cycle and the latest transmission check data checked in the current transmission check cycle are judged to determine whether the previous transmission check data and the latest transmission check data are different, and the previous transmission check If the data is different from the latest transmission check data, the control for causing the transmission check indicator 800 to emit light is executed. ,

Auto parking system for industrial vehicles and construction equipment.