WO2020013552A1

WO2020013552A1 - High speed shuttle prevention system for construction equipment

Info

Publication number: WO2020013552A1
Application number: PCT/KR2019/008383
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: KR101939792B1

Abstract

A transmission control part of a high speed shuttle prevention system for an industrial vehicle and construction equipment of the present invention, determines whether a forward stage signal or a backward stage signal is input from a shift operation part in order to switch driving, while driving in a forwards or backwards direction, to an opposite direction, and determines, when the forward stage signal or the backward stage signal is input while driving, whether current vehicle speed input from a speed sensor is equal to or less than a shift switching operation speed value so as to open, when the current vehicle speed is equal to or greater than the shift switching operation speed value, a forward side solenoid valve and a backward side solenoid valve in order to switch to a neutral shift mode, and to close, when the current vehicle speed decreases below the shift switching operation speed value, the forward side solenoid valve or the backward side solenoid valve, according to the forward stage signal or the backward stage signal input from the shift operation part, in order to control a forward clutch part or a backward clutch part to connect to an axle part.

Description

High speed shuttle prevention system for construction equipment

The present invention relates to a high-speed shuttle prevention system for industrial vehicles and construction equipment, and more particularly to an industrial vehicle that can prevent the rapid high-speed driving in the reverse direction when the gear is shifted in order to change the direction in the reverse direction during high-speed driving and A high speed shuttle prevention system for construction equipment.

Since construction equipment and industrial vehicles (construction machinery such as forklifts and excavators, heavy equipment vehicles, etc.) have a constant engine output, they are essentially equipped with an automatic transmission driving device, which is a transmission for changing the driving direction or changing the driving speed. The automatic transmission drive includes a torque converter connected to the engine flywheel.

Thus, when the driver operates the shift lever, the hydraulic pressure for shifting the shift stage is transmitted to the clutch unit of the transmission, and at the same time, the engine power transmitted through the torque converter is transmitted to the axle through the transmission.

On the other hand, in the case of a forklift, when the driver operates the forward and backward levers from the forward position to the reverse position, the control unit senses this and energizes the reverse side solenoid valve of the transmission to execute the reverse shift without delay.

However, when the forklift is subjected to such a delay-free shifting process while driving at high speed, the transmission may be excessively driven and a large shock may be generated, resulting in a serious tire wear due to a sudden change in driving direction.

Therefore, the problem to be solved by the present invention is to prevent damage to the transmission unit and driver's safety by preventing excessive driving of the transmission unit due to rapid change of direction and high-speed driving in the reverse direction when the gear is shifted for the shift in the reverse direction during high speed driving. It is to provide a high-speed shuttle prevention system for industrial vehicles and construction equipment to facilitate the wear, and to prevent tire wear.

High-speed shuttle prevention system for industrial vehicles and construction equipment for industrial vehicles and construction equipment according to an embodiment of the present invention for blocking and applying the transfer of the working fluid for the operation of the forward clutch, reverse clutch, the forward clutch portion. Forward side solenoid valve, a reverse side solenoid valve for blocking and applying the transfer of the working fluid for the operation of the reverse clutch, a charging pump for supplying the working fluid in the direction of the forward clutch and the reverse clutch, from the charging pump A transmission part including a supplied working fluid and a hydraulic pressure of the working fluid to the forward side solenoid valve and the reverse side solenoid valve; 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 receiving a signal from the shift control unit and the speed detection sensor, and according to the forward speed signal and the reverse signal input of the shift control unit and the current vehicle speed measured by the speed sensor, the forward side solenoid valve and the reverse side solenoid. And a transmission control unit for controlling the opening / closing operation of the valve and pre-input of a shift switching operation speed value for defining a point in time at which the shift is operated in accordance with the forward gear signal or the reverse gear signal input from the shift control unit during driving. The transmission controller determines whether a forward or reverse signal is input from the shift operator to reverse driving during forward or backward driving. When the forward or backward signal is input during driving, the speed sensor The current vehicle speed input from the shifting If the current vehicle speed is equal to or greater than the shift switching operation speed value, the forward side solenoid valve and the reverse side solenoid valve are opened to switch to the neutral shift mode, and the current vehicle speed is the shift shift operation. When the speed decreases below the speed value, the forward clutch unit or the reverse clutch unit is controlled to be connected to the axle part by closing the forward side solenoid valve or the reverse side solenoid valve according to the forward forward signal or the reverse forward signal inputted from the shift control unit. It is done.

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 shift control unit, a speed detection sensor, an accelerator pedal switch, a brake pedal switch, a forward side solenoid valve and a 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.

High-speed shuttle prevention system for industrial vehicles 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 opens the forward side solenoid valve and the reverse side solenoid valve in the process of switching to the neutral shift mode. Store the vehicle speed value matched with 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, and if the transmission inspection period is the previous one identified in the previous transmission inspection period, By comparing the transmission check data and the latest transmission check data checked in the current transmission check cycle, it is determined whether the previous transmission check data and the latest transmission check data are different, and if the previous transmission check data and the latest transmission check data are different, the transmission check Execute control to light indicator Can.

The high-speed shuttle prevention system for industrial vehicles and construction equipment according to another embodiment of the present invention further includes a cooling member accommodated in the lower case and in contact with 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. A cooling fluid receiving chamber in which a zigzag flow path is formed in an 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 direction 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 high-speed shuttle prevention system for industrial vehicles and construction equipment according to the present invention, when shifting the gear to the forward or reverse stage to switch the driving in the reverse direction during the forward driving or the backward driving, the sharp direction change in the gear shifted direction And high-speed driving in the reverse direction can be prevented, and excessive driving of the transmission section due to rapid change of direction and high-speed driving in the reverse direction can be prevented, thereby preventing driver's damage and impact caused by sudden change of driving direction, thereby promoting driver safety. In addition, there is an advantage such that the wear of the tire can be prevented.

1 is a block diagram conceptually showing the configuration of a high-speed shuttle prevention system for industrial vehicles 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 a high-speed shuttle prevention system for an industrial vehicle and construction equipment according to an embodiment of the present invention.

3 is an exploded perspective view for explaining the configuration of the transmission control unit of the high-speed shuttle prevention system for industrial vehicles and construction equipment according to an embodiment of the present invention.

4 is a flowchart illustrating a process of implementing clipping speed control by a high speed shuttle prevention system for an industrial vehicle and construction equipment according to an embodiment of the present invention.

Figure 5 is a block diagram conceptually showing the configuration of a high-speed shuttle prevention system for industrial vehicles and construction equipment according to another embodiment of the present invention.

6 is a flow chart for explaining a process of the display of the transmission check by the high-speed shuttle prevention system for industrial vehicles and construction equipment according to another embodiment of the present invention.

7 is an exploded perspective view illustrating a high speed shuttle prevention system for an industrial vehicle and construction equipment according to another embodiment of the present invention.

8 is a perspective view for explaining a fluid circulation means of the high-speed shuttle prevention system for industrial vehicles and construction equipment according to another embodiment of the present invention.

9 is a cross-sectional view showing a board cooling plate and a control board accommodated in the cooling water chamber of the high-speed shuttle prevention system for industrial vehicles and construction equipment according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail for the high-speed shuttle prevention 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 a high-speed shuttle prevention system for industrial vehicles and construction equipment according to an embodiment of the present invention, Figures 2a and 2b is an industrial vehicle and construction site according to an embodiment of the present invention 3 is a cross-sectional view and a perspective view for explaining the configuration of the forward clutch unit and the reverse clutch unit of the transmission control unit of the high-speed shuttle prevention system, and FIG. 3 is a transmission control unit of the high-speed shuttle prevention system for industrial vehicles and construction equipment according to an embodiment of the present invention. It is the separated perspective view for demonstrating the structure of this.

1 to 3, the high-speed shuttle prevention system for industrial vehicles and construction equipment according to an embodiment of the present invention is a transmission unit 100, a shift operation unit 200, a speed sensor 300, a transmission control unit ( 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, the axle portion 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 shift control unit 200 is adopted as a gear control lever installed in a driver's seat of the vehicle and capable of operating forward / neutral / reverse shift stages, and 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 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.

The transmission control unit 400 receives a signal from the shift operation unit 200, the speed detection sensor 300, the accelerator pedal switch 600 of the vehicle, and the brake pedal switch 500 of the vehicle, and the shift operation unit 200. Controlling the opening and closing operation of the forward side solenoid valve 130 and the reverse side solenoid valve 140 according to the forward forward signal and the reverse forward signal input and the current vehicle speed measured by the speed sensor 300, A shift switching operation speed value for defining a point in time at which the shift is operated in accordance with the forward speed signal or the reverse speed signal input from the shift operation unit 200 while driving is input in advance. For example, the shift switching operation speed value may be set to 7 km.

The transmission control unit 400 determines whether a forward forward signal or a reverse signal is input from the shift operator 200 in order to switch the driving direction in the reverse direction during the forward driving or the backward driving. If it is input, it is determined whether the current vehicle speed input from the speed sensor 300 is equal to or less than the shift switching operating speed value, and if the current vehicle speed is equal to or greater than the shift switching operating speed value, the forward side solenoid valve 130 and The reverse side solenoid valve 140 is opened to switch to the neutral shift mode, and when the current vehicle speed decreases below the shift change operation speed value, the forward side solenoid according to the forward forward signal or the reverse forward signal input from the shift operator. The forward clutch unit 110 or the reverse clutch unit 120 is closed by closing the valve 130 or the reverse solenoid valve 140. It may be controlled to be connected to the axle portion 70.

Here, the neutral shift mode means a state in which the forward clutch unit 110 and the reverse clutch unit 120 are not connected to the axle unit 70, which is a forward side solenoid valve 130 and a reverse side solenoid valve 140. ) Is opened so that the pressure of the working fluid and the working fluid is supplied to the forward clutch unit 110 and the reverse clutch unit 120 so that the forward clutch unit 110 and the reverse clutch unit 120 are not connected to the axle unit 70. Not in condition. On the contrary, when any one of the forward clutch unit 110 and the reverse clutch unit 120 is closed and the other is open, the pressure of the working fluid and the working fluid is supplied to the forward clutch unit 110 or the reverse clutch unit 120. It becomes a state which can drive forward or backward connected with the axle part 70.

On the other hand, the transmission control unit 400 is installed on one side of the inside 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 shift control unit 200, the accelerator pedal switch 600, the brake pedal switch 500, and the speed sensor 300 on the substrate, and moves the solenoid valve 130 and the reverse side to the forward 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.

Connector 440 is the control circuit is the shift control unit 200, the speed sensor 300, the accelerator pedal switch 600, the brake pedal switch 500, the forward side solenoid valve 130 and the reverse side solenoid valve ( 140) to be electrically connected. To this end, the connector 440 is provided on one side of the control board 410 is electrically connected to the control circuit, the shift operation unit 200, the speed detection sensor 300, the accelerator pedal switch 600, the brake pedal switch ( 500), 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.

The high-speed shuttle prevention system for industrial vehicles and construction equipment according to an embodiment of the present invention safely controls the shifting process to the forward or reverse stage for driving conversion in the reverse direction during the forward driving or the backward driving.

Hereinafter, a process of controlling a shift during driving of an industrial vehicle through a high speed shuttle prevention system according to an embodiment of the present invention will be described with reference to FIG. 4. For example, a reverse shift may be performed while the industrial vehicle is traveling in a forward direction. Explain that it is made. 4 is a flowchart illustrating a process of implementing shift control during driving by a high speed shuttle prevention system for an industrial vehicle and construction equipment according to an exemplary embodiment of the present invention.

First, in a process in which the driver operates the shift operation unit 200 to move forward, the transmission control unit 400 determines whether the reverse shift signal is input from the shift operation unit 200 to switch to the reverse direction, that is, backward driving. Determine (S110).

When the reverse signal is input while driving forward, the transmission control unit 400 determines whether the current vehicle speed input from the speed sensor 300 is a shift switching operation speed value, for example, the current vehicle speed is 7 km or more ( S120).

If the current vehicle speed is a shift switching operating speed value, for example, 7 km or more, the transmission control unit 400 opens the forward side solenoid valve 130 and the reverse side solenoid valve 140 to move the forward clutch unit 110 and the reverse clutch unit. Switching to the neutral shift mode in which the working fluid and the pressure of the working fluid are supplied to 120 (S130).

Subsequently, in the neutral shift mode, the transmission control unit 400 determines whether the current vehicle speed input from the speed detection sensor 300 is less than the shift switching operating speed value, for example, 7 km (S140).

If the current vehicle speed is less than 7 km, the transmission control unit 400 closes the reverse side solenoid valve 140 according to the reverse stage signal input from the shift control unit 200 so that the reverse clutch unit 120 is connected to the axle unit 70. (S150).

When using the high-speed shuttle prevention system for industrial vehicles and construction equipment according to an embodiment of the present invention, the gear is shifted when shifting the gear to the forward or reverse stage to switch the driving in the reverse direction during the forward driving or backward driving It is possible to prevent sudden change of direction in the direction and high speed driving in the reverse direction, and to prevent excessive driving of the transmission part 100 due to rapid change of direction and high speed driving in the reverse direction, thereby causing damage and rapid running of the transmission unit 100. There is an advantage of preventing the impact caused by the change of direction to promote the safety of the driver, to prevent the wear of the tire.

Hereinafter, the high-speed shuttle prevention system for industrial vehicles and construction equipment according to another embodiment of the present invention with reference to Figures 5 and 6 and the difference between the high-speed shuttle prevention system for industrial vehicles and construction equipment according to an embodiment of the present invention Explain the center. 5 is a block diagram conceptually showing a configuration of a high speed shuttle prevention system for an industrial vehicle and construction equipment according to another embodiment of the present invention, and FIG. 6 is a high speed shuttle for an industrial vehicle and construction equipment according to another embodiment of the present invention. It is a flowchart for explaining the process of implementing the display of transmission check by the prevention system.

5, the high-speed shuttle prevention system for industrial vehicles and construction equipment according to another embodiment of the present invention, except that the transmission further includes a transmission check indicator 800 and the pressure measuring sensor 900 of the present invention. Since the same as the configuration of the high-speed shuttle prevention system for industrial vehicles and construction equipment according to an 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 in the process of switching to the neutral shift mode by opening the forward-side solenoid valve 130 and the reverse-side solenoid valve 140 during the process of implementing the shift control while driving the vehicle, the storage The unit 460 stores the pressure measurement value for each section and the vehicle speed value matched with the pressure measurement value for each section, and then determines whether the current time point is the transmission inspection period, and if the transmission inspection period, the previous transmission inspection period. Compares the previous transmission check data and the latest transmission check data checked in the current transmission check cycle to determine whether the previous transmission check data and the latest transmission check data are different, and the previous transmission check data and the latest transmission check data are different. In this case, it is possible to execute a control to emit the transmission check indicator 800.

Since the process of shift control during driving by the high speed shuttle prevention system for industrial vehicles and construction equipment according to another embodiment of the present invention is the same as the high speed shuttle prevention system for industrial vehicles and construction equipment according to the embodiment of the present invention Hereinafter, a description will be given with reference to FIG. 6 with a focus on a process of indicating whether a transmission inspection is required by a high speed shuttle prevention system for an industrial vehicle and construction equipment according to another embodiment of the present invention.

In the process of displaying whether the transmission inspection is necessary, in the process of implementing the shift control during driving described with reference to Figure 4 in the description of the high-speed shuttle prevention system for industrial vehicles and construction equipment according to an embodiment of the present invention, the forward side Opening the solenoid valve 130 and the reverse side solenoid valve 140 is executed in step S130 to switch to the neutral shift mode.

Referring to FIG. 6, in the process of indicating whether the transmission is required for inspection, when the forward side solenoid valve 130 is opened and the pressure of the working fluid is input to the forward clutch unit 110, the transmission control unit 400 stores the transmission. The unit 460 stores the vehicle pressure value matched with the pressure measurement value for each section and the pressure measurement value for each section (S131).

Subsequently, it is determined whether the current time point is the transmission cycle check period (S132).

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 (S133).

Subsequently, if the previous transmission check data and the latest transmission check data are different, the transmission controller 400 emits the transmission check light 800 (S134). 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 high, it is determined that the previous transmission check data and the latest transmission check data are different.

The high-speed shuttle prevention 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 The current vehicle speed value measured at the time when the pressure measurement value is measured may be checked at regular intervals to determine whether the latest vehicle speed value is measured higher than the previous vehicle speed value.

Here, the recent vehicle speed value measured higher than the previous vehicle speed value means that the braking force of the vehicle is lowered, and that the braking force of the vehicle is lowered to supply the working fluid to the forward clutch unit 110 or the reverse clutch unit 120. It means that the performance of the fluid supply means, largely the performance of the transmission unit 100, while the supply of the working fluid by the fluid supply means such as the charging pump 150 and the main pressure valve 160 is not smooth. do.

Therefore, when the high-speed shuttle prevention system for industrial vehicles and construction equipment according to another embodiment of the present invention, the driver can easily confirm that the braking force of the vehicle is lowered during the shift during high-speed driving, the braking force of the vehicle is lowered The driver can immediately check the state even while the vehicle is driving. Accordingly, the driver immediately recognizes a state in which the braking force of the vehicle is lowered, thereby quickly performing maintenance of the transmission unit 100.

Hereinafter, the high-speed shuttle prevention system for industrial vehicles and construction equipment according to another embodiment of the present invention with the high-speed shuttle prevention system for industrial vehicles and construction equipment according to an embodiment of the present invention with reference to FIGS. The explanation focuses on the differences. Figure 7 is an exploded perspective view illustrating a high speed shuttle prevention system for industrial vehicles and construction equipment according to another embodiment of the present invention, Figure 8 is a high speed shuttle for industrial vehicles and construction equipment according to another embodiment of the present invention 9 is a perspective view illustrating a fluid circulation means of the prevention system, and FIG. 9 illustrates a board cooling plate and a control board accommodated in a cooling water chamber of a high speed shuttle prevention system for an industrial vehicle and construction equipment according to another embodiment of the present invention. It is sectional drawing shown.

7 to 9, the high-speed shuttle prevention system for industrial vehicles and construction equipment according to another embodiment of the present invention, the transmission control unit 400 is the lower case to cool the control board 410 is heat generated 420 is the same as the high-speed shuttle prevention 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 in contact with the control board 410 Hereinafter, the cooling member 700 will be described.

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 immersed in the cooling fluid supplied to the flow path 713 in the cooling fluid receiving chamber 710 and cooled.

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 through).

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.

The high-speed shuttle prevention system for industrial vehicles and construction equipment according to another embodiment of the present invention by heating and repeated control by the outside air in the closed space inside the upper case 430 and the lower case 420 It is possible to quickly cool the control board 410 of the transmission control unit 400 generated by heat generation.

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 zigzag from 7131 toward the exit portion 7142.

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 through the cooling process.

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 rapidly cooled at all times through the circulation of the fluid, so that the heating and the high ambient temperature are caused by the repeated control of the transmission control unit 400 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 an industrial vehicle.

On the other hand, the outer surface of the lower case 420 and the upper case 430 of the transmission control unit 400 of the high-speed shuttle prevention system for industrial vehicles and construction equipment for industrial vehicles and construction equipment according to embodiments of the present invention The antifouling coating layer coated with the antifouling coating composition may be formed so as to effectively achieve the prevention and removal of adhesion.

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 high-speed shuttle prevention 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 have 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 high-speed shuttle prevention 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 Is mixed with 60% by weight of rubber, 33 to 36% by weight of carbon black, 2 to 5% by weight of antioxidant, and 1 to 3% by weight of sulfur as an accelerator.

Carbon black is added to increase the wear resistance, but if the content is less than 33% by weight, the elasticity and abrasion resistance is reduced, if 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 of 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%. Less than 1% by weight is a slight vulcanization effect in the heating step during molding, so 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, and there is a possibility that the elastic force may drop, so 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 200 is coated with a fragrance substance having a function such as respiratory disease treatment, thereby exhibiting effects on fatigue recovery, health promotion, and the like of the user.

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 200, it serves to contribute to worker's fatigue recovery, 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 ;

Shift operation unit 200 for the forward / neutral / reverse shift stage operation;

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

Receives a signal from the shift control unit 200 and the speed sensor 300, the forward speed signal and the reverse signal input of the shift control unit 200 and the current vehicle speed measured by the speed sensor 300 In accordance with the control of the opening and closing operation of the forward-side solenoid valve 130 and the reverse-side solenoid valve 140, and the shifting time in accordance with the forward forward signal or the reverse signal input from the shift operation unit 200 during driving And a transmission control unit 400 in which a shift switching operating speed value to prescribe is input in advance.

The transmission control unit 400 determines whether a forward forward signal or a reverse forward signal is input from the shift operator 200 in order to switch to the reverse direction during the forward driving or the backward driving, and the forward forward signal or the reverse signal during driving. When is input, it is determined whether the current vehicle speed input from the speed detection sensor 300 is less than the shift switching operation speed value, and if the current vehicle speed is more than the shift switching operation speed value, the forward-side solenoid valve 130 And the reverse side solenoid valve 140 is opened to switch to the neutral shift mode, and when the current vehicle speed is reduced to less than the shift switching operation speed value, the forward side signal according to the forward forward signal or the reverse forward signal input from the shift control unit. The solenoid valve 130 or the reverse side solenoid valve 140 is closed to close the forward clutch 110 or reverse clutch. 120 is characterized in that the control to be connected to the axle part 70,

High speed shuttle prevention 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;

The control circuit is electrically connected to the control circuit, and the control circuit 200, the speed detection sensor 300, the accelerator pedal switch 600, the brake pedal switch 500, the forward side solenoid valve 130 and the reverse A connector 440 for electrically connecting the side solenoid valve 140;

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,

High speed shuttle prevention 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 pipe 731 connected to an inlet portion 7131 located at one end of the entire length of the flow path and an outlet portion 7122 located at the other end of the entire length of the flow path for circulating a cooling fluid, the fluid circulation A fluid circulation pump 732 installed on the pipe 731 and driven to circulate the cooling fluid in the fluid passage and the fluid circulation pipe, and on the fluid circulation pipe 731 and the outlet portion 7122. A fluid circulation means 730 including a heat exchanger 733 for exchanging heat with the fluid discharged therefrom,

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

High speed shuttle prevention 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,

The transmission control unit 400 opens the forward side solenoid valve 130 and the reverse side solenoid valve 140 to switch to the neutral shift mode, and the pressure measurement value for each section is stored in the storage unit 460. The vehicle speed value matched with the pressure measurement value for each section is stored, and then it is determined whether the current time is the transmission inspection cycle, and if the transmission inspection cycle, the previous transmission inspection data and the current transmission inspection cycle identified in the previous transmission inspection cycle It is determined whether the previous transmission check data and the latest transmission check data are different by comparing the latest transmission check data to be checked, and if the previous transmission check data and the latest transmission check data are different from each other, a control for emitting the transmission check light 800. Characterized in that,

High speed shuttle prevention system for industrial vehicles and construction equipment.