WO2014058120A1 - Swashplate with improved structure for hydrostatic speed change device - Google Patents

Swashplate with improved structure for hydrostatic speed change device Download PDF

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Publication number
WO2014058120A1
WO2014058120A1 PCT/KR2013/004090 KR2013004090W WO2014058120A1 WO 2014058120 A1 WO2014058120 A1 WO 2014058120A1 KR 2013004090 W KR2013004090 W KR 2013004090W WO 2014058120 A1 WO2014058120 A1 WO 2014058120A1
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WO
WIPO (PCT)
Prior art keywords
swash plate
plate
shoe
shoe plate
motor
Prior art date
Application number
PCT/KR2013/004090
Other languages
French (fr)
Korean (ko)
Inventor
정춘국
Original Assignee
(주)제일피엠씨
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by (주)제일피엠씨 filed Critical (주)제일피엠씨
Priority to CN201380001021.9A priority Critical patent/CN103946542B/en
Publication of WO2014058120A1 publication Critical patent/WO2014058120A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2078—Swash plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
    • F04B1/124—Pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/128—Driving means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
    • F04B27/0804—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B27/0821—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block component parts, details, e.g. valves, sealings, lubrication
    • F04B27/086—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block component parts, details, e.g. valves, sealings, lubrication swash plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027—Pulsation and noise damping means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/42—Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity
    • F16H61/439—Control of the neutral position, e.g. by zero tilt rotation holding means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/11—Kind or type liquid, i.e. incompressible
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H39/00—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution
    • F16H39/04—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motor and pump combined in one unit
    • F16H39/06—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motor and pump combined in one unit pump and motor being of the same type
    • F16H39/08—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motor and pump combined in one unit pump and motor being of the same type each with one main shaft and provided with pistons reciprocating in cylinders
    • F16H39/10—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motor and pump combined in one unit pump and motor being of the same type each with one main shaft and provided with pistons reciprocating in cylinders with cylinders arranged around, and parallel or approximately parallel to the main axis of the gearing
    • F16H39/12—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motor and pump combined in one unit pump and motor being of the same type each with one main shaft and provided with pistons reciprocating in cylinders with cylinders arranged around, and parallel or approximately parallel to the main axis of the gearing with stationary cylinders
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps

Definitions

  • the present invention relates to an improved swash plate structure for a hydrostatic transmission, and in particular, the malfunction of the shift lever in the neutral position of the shift lever according to the contact structure of the face-to-face of the conventional swash plate and the shoe plate causes malfunctions.
  • the swash plate of the improved structure to solve the problem.
  • a hydrostatic pressure transmission device used for shifting a vehicle such as a combine or a tractor is a hydraulic oil discharged by a variable displacement hydraulic pump 2 driven by an engine 1 as schematically shown in FIGS. 1 and 2.
  • the hydraulic motor 3 is supplied to the hydraulic motor 3, and is returned to the hydraulic pump therefrom.
  • the hydraulic motor 3 is installed below the hydraulic pump to drive the hydraulic pump by the engine and the hydraulic pipe.
  • the hydraulic motor connected through is driven.
  • Reference numeral 4 is an output shaft of the motor.
  • the hydraulic pump is provided with a shoe plate 11 in contact with a face-to-face to a swash plate 10 which is operated to oscillate by an operating lever not shown in the drawing, and the shoe plate 11 is a configuration in which the piston assemblies 12 provided in the plurality of cylinders are arranged so that cylinders not shown in the drawings may be interlocked by manipulation of the swash plate.
  • the swash plate 10 since the swash plate 10 is disposed in a state of being completely in surface contact with the shoe plate 11 to operate sensitively to the movement of the operation lever, the width of the neutral section in which the rotation of the motor must be completely stopped is reduced. ,
  • the operation lever of the neutral position has a problem that causes the unstable behavior of the hydraulic system, such as an accident caused by the pistons to operate even in the small movement unintended by the operator's carelessness.
  • the variable hydraulic actuator of Japanese Patent Application Laid-Open No. 59-79078 (published on May 8, 1984) has an arrangement structure in which the swash plate and the shoe plate are in contact with each other in a face-to-face manner, thereby causing the problem of unstable behavior of the hydraulic device. there was.
  • the rapid pulsation is generated in response to the movement sensitive to the operation lever as described above, there was a problem of reduced durability of the hydraulic device and inefficiency of the pressure oil flow.
  • the present invention is to contact the shoe plate in order to solve the problem according to the arrangement of the shoe plate surface contact to the swash plate in the variable displacement hydraulic pump of the hydrostatic transmission device provided in a vehicle such as a conventional combine or tractor.
  • a vehicle such as a conventional combine or tractor.
  • Another object of the present invention is to provide a swash plate structure with improved return force for ensuring neutrality of the swash plate.
  • the swash plate of the improved structure for the hydrostatic transmission has an annular swash plate arranged around a pump shaft disposed through a central hole in a body.
  • the shoe plates connected to each of the plurality of piston assemblies are annularly arranged to contact each other, the valve device is opened and closed in conjunction with the operation of the piston assembly connected to each of the shoe plates, and according to the operation of the operation lever.
  • a swash plate for a hydrostatic transmission in which a swash plate contacts a shoe plate and selectively operates a valve assembly corresponding to a piston assembly to drive a motor, the inner surface of the swash plate facing the shoe plate.
  • the shoe plate is in linear contact with the swash plate at a portion adjacent to the hole in the center of the swash plate, and at the neutral position where the motor is stopped, the swash plate is inclined by the operation of the operating lever.
  • the motor is configured to be delayed in driving as the shoe plate is delayed and operated during the time when the shoe plate is in surface contact with the shoe plate.
  • the angle at which the swash plate is inclined away from the shoe plate is selected in consideration of the capacity of the hydraulic pump, but is preferably selected between 0.5 ° and 5.4 °.
  • the swash plate is formed with spring holes on both sides of an imaginary straight line connecting two fixing pins formed on both sides of the hole to give an inclination angle of a predetermined angle with respect to the rotation axis of the swash plate.
  • the shoe plate disposed to face one side of the swash plate also forms a spring hole at a position opposite to the spring hole formed in the swash plate, and a spring in each of the spring hole of the swash plate and the spring hole of the shoe plate. Both side portions of the are preferably inserted into the spring is configured to improve the return force of the swash plate.
  • the swash plate is in line contact with the shoe plate to which the piston assembly and the valve device are connected.
  • the operation of the hydraulic motor is delayed during the time from the line contact between the sea plate and the shoe plate to the surface contact, so that the section of the neutral position is easily enlarged, and thus compared with the structure of the shoe plate, which was sensitive to the conventional swash plate. Therefore, the safety accident and sudden operation of the hydraulic system are prevented, so that the occurrence of pulsation is prevented, thereby improving the product quality.
  • FIG. 1 is a schematic configuration diagram of a hydraulic pump and a hydraulic motor for a conventional hydrostatic transmission.
  • Figure 2 is a cross-sectional view showing the configuration of the integrated hydraulic pump and hydraulic motor for a schematic hydrostatic transmission device showing a conventional arrangement of the swash plate and the shoe plate.
  • 3 and 4 is a view showing the operation lever, the swash plate and the pump and the motor corresponding to the operation when the hydraulic motor rotates clockwise in the conventional hydrostatic transmission.
  • FIG 5 and 6 are views showing the operating state of the operating lever and the swash plate and the pump and motor corresponding thereto when the hydraulic motor rotates counterclockwise.
  • FIG. 7 and 8 are views showing the operating state of the operating lever and the swash plate and the pump and the motor corresponding to the stop position of the hydraulic motor.
  • FIG. 9 is a cross-sectional view showing a swash plate structure of the improved structure according to the present invention.
  • FIG. 10 is a perspective view of the swash plate of FIG. 9.
  • FIG. 11 is a plan view of a swash plate according to another embodiment of the present invention.
  • FIG. 12 is a cross-sectional view of a spring mounted state between the swash plate and the shoe plate of FIG.
  • FIG. 13 is a plan view and a sectional view of the shoe plate of FIG. 12; FIG.
  • FIG. 14 is a variation of the swash plate of FIG. 10 and shows two pairs of spring holes.
  • the swash plate of the improved structure for the hydrostatic transmission according to the present invention has a plurality of piston assemblies in one side of the annular swash plate disposed around the pump shaft disposed through the central hole in the body.
  • the shoe plates connected to each other and annularly arranged are in contact with each other, the valve device is opened and closed in response to the operation of the piston assembly connected to each of the shoe plates, and the swash plate contacts the shoe plates according to the operation of the operation lever.
  • the swash plate for the hydrostatic transmission is configured to selectively operate the valve assembly corresponding to the piston assembly to drive the motor, the inner surface of the swash plate opposed to the shoe plate in the portion adjacent to the center hole Inclined away from shoe plate toward radially outer side
  • the shoe plate is in line contact with the swash plate at a portion adjacent to the center hole of the swash plate, and at the neutral position where the motor is stopped, the shoe plate is in line with the swash plate inclined by the operation of the operating lever.
  • the motor is configured to delay driving as it is delayed and operated during the time of surface contact in the contacted state.
  • the hydrostatic transmission apparatus is one side 104 of the annular swash plate 102 arranged around the pump shaft 101 in the body 100
  • the shoe plate 103 is arranged in line contact, the shoe plate is connected to each of the plurality of piston assembly 106 is disposed in an annular shape.
  • the inner surface of the swash plate 102 opposite to the shoe plate 103 is to the shoe plate toward the radially outward from the portion adjacent to the central hole 105 It is formed to be inclined away from.
  • the inclination is set in consideration of the capacity of the pump and the like, and is preferably selected in the range of 0.5 ° to 5.4 °.
  • the shoe plate Due to the inclination of the inner surface of the swash plate, the shoe plate is in line contact at the portion adjacent to the hole 105, so that, for example, when the lever is operated to the position shown in FIG. 4 in the neutral state shown in FIG.
  • the operation of the piston assembly connected to the shoe plate is delayed and the opening of the valve is delayed. Therefore, the rotation of the motor clockwise is delayed.
  • one side 104 of the swash plate 102 has an inclination angle of a predetermined angle with respect to the axis of rotation of the swash plate to ensure neutrality of the swash plate.
  • One spring hole 115 is formed at both sides of an imaginary straight line connecting two fixing pins 110 formed at both sides with respect to the hole 105, and one side surface 104 of the swash plate.
  • the spring plate 117 is formed at a position opposite to the hole 115 in the shoe plate 103 disposed to face the spring 115, and the spring hole 115 of the swash plate and the spring hole 117 of the shoe plate are formed. Both sides of the spring 120 are respectively inserted and mounted thereto.
  • the inner surface of the swash plate 102 opposite the shoe plate 103 is in a range between 0.5 ° and 5.4 ° so as to move away from the shoe plate toward the radially outward at a portion adjacent the central hole 105. Even when formed to be inclined, the swash plate may be balanced without being inclined to either side by the reaction force of the spring.
  • Hydrostatic transmissions are provided with a return force that automatically returns to neutral when actuated by lever or pedal operation, ie by releasing or releasing the lever or pedal. If it is weak or weak, the swash plate does not return or is inclined at a larger angle, resulting in greater maneuvering displacement. If the return force is smaller than the operating force, a critical problem may occur in the stability of the product.
  • This problem is solved in this embodiment by improving the neutral balance of the swash plate with the return force provided by the reaction force of the spring provided between the swash plate and the shoe plate, thus improving the stability of the product.
  • the contact surface of the swash plate is inclined when the swash plate provided to the hydraulic pump of the hydrostatic transmission is contacted to the shoe plate by lever operation in a combine or a tractor to control the operation of the hydraulic motor.
  • the shoe plate In the neutral position, the shoe plate is in line contact with the swash plate, and then the piston assembly is operated while the surface is contacted by the lever operation so that the behavior of the hydraulic device is delayed for the time from the line contact to the surface contact. It can be easily applied to the transmission without major structural changes.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reciprocating Pumps (AREA)
  • Hydraulic Motors (AREA)

Abstract

The present invention relates to a swashplate for a hydrostatic speed change device for selectively working valve devices corresponding to a piston assembly (106) by contacting a shoe plate according to the motion of an operational lever so as to drive a motor. The inside surface of the swashplate (102) facing the shoe plate (103) is formed so as to be separated away from the shoe plate radially toward the outside from the portion adjacent to a central hole (105) of the swash plate, and the shoe plate linearly contacts the swashplate at the portion adjacent to the central hole (105). In the neutral position where the motor is stopped, the driving of the motor is delayed while the shoe plate is going from the state of linearly contacting the swashplate to the state of making a plane-contact with the swashplate by means of the operational lever. Thus, the driving of the hydraulic motor is delayed while the contacting between the swashplate and the shoe plate is changed from the linear contact to the plane-contact, so that the interval of the neutral position is conveniently increased, and accordingly the hydraulic device is prevented from generating accidents and pulses compared to the conventional structure of the shoe plate sensitively reacting to the swashplate, thereby improving the quality of the product.

Description

정유압변속장치용 개선된 구조의 스와시 플레이트Improved swash plate for hydrostatic transmission
본 발명은 정유압변속장치용의 개선된 스와시 플레이트 구조에 관한 것으로, 특히 종래 스와시 플레이트와 슈 플레이트의 면대면의 접촉구조에 따른 변속레버의 중립위치에서 부주의에 의한 접촉시 오작동하게 되는 문제점을 해결하도록 개선된 구조의 스와시 플레이트에 관한 것이다. The present invention relates to an improved swash plate structure for a hydrostatic transmission, and in particular, the malfunction of the shift lever in the neutral position of the shift lever according to the contact structure of the face-to-face of the conventional swash plate and the shoe plate causes malfunctions. The swash plate of the improved structure to solve the problem.
일반적으로 콤바인이나 트랙터와 같은 차량의 변속에 이용되는 정유압변속장치는 도 1과 2에 개략적으로 도시된 바와같이 엔진(1)에 의해 구동되는 가변용량형 유압펌프(2)에 의해 토출되는 압유는 유압모터(3)으로 공급되고, 그로부터 유압펌프로 귀환되는 구성을 갖고, 유압배관 형성을 간소화 하기 위하여 상기 유압펌프 하측에 유압모터(3)가 설치되어 엔진에 의해 유압펌프를 구동하고 유압 배관을 통해 연결된 유압모터가 구동된다. 도면부호(4)는 모터의 출력축이다.In general, a hydrostatic pressure transmission device used for shifting a vehicle such as a combine or a tractor is a hydraulic oil discharged by a variable displacement hydraulic pump 2 driven by an engine 1 as schematically shown in FIGS. 1 and 2. The hydraulic motor 3 is supplied to the hydraulic motor 3, and is returned to the hydraulic pump therefrom. In order to simplify the formation of the hydraulic pipe, the hydraulic motor 3 is installed below the hydraulic pump to drive the hydraulic pump by the engine and the hydraulic pipe. The hydraulic motor connected through is driven. Reference numeral 4 is an output shaft of the motor.
상기 유압펌프에는 도면에 도시되지 않은 조작레버에 의해 요동운동하도록 작동되는 스와시 플레이트(swash plate)(10)에 면대면으로 접촉된 슈 플레이트(shoe plate)(11)가 배치되고, 상기 슈 플레이트(11)는 복수개의 실린더에 제공된 피스톤 어셈블리(12)들이 배치된 구성으로 스와시 플레이트의 조작에 의해 도면에 도시되지 않은 실린더가 연동하게 된다.The hydraulic pump is provided with a shoe plate 11 in contact with a face-to-face to a swash plate 10 which is operated to oscillate by an operating lever not shown in the drawing, and the shoe plate 11 is a configuration in which the piston assemblies 12 provided in the plurality of cylinders are arranged so that cylinders not shown in the drawings may be interlocked by manipulation of the swash plate.
도 3 내지 도 8을 참고하여 설명하면, 도 3의 조작레버와 스와시 플레이트 위치에서는 도 4에 도시된 바와같이 유로가 연결되어 모터가 시계방향 회전 작동하게 되고, 도 5에 도시된 조작레버와 스와시 플레이트 위치에서는 도 6에 도시된 바와같이 모터가 반시계방향으로 회전하게 되고, 도 7에 도시된 조작레버와 스와시 플레이트 위치에서는 도 8에 도시된 바와같이 유압펌프로 부터 모터로의 유로가 단속되어 모터가 정지되며, 이와같이 조작레버에 의해 조작되는 스와시 플레이트의 각도에 따라 모터의 회전방향이 자동으로 변경된다.Referring to Figures 3 to 8, in the operating lever and the swash plate position of Figure 3 as shown in Figure 4 the flow path is connected to the motor to operate the clockwise rotation, and the operation lever shown in Figure 5 In the swash plate position, the motor rotates counterclockwise as shown in FIG. 6, and in the operating lever and swash plate position shown in FIG. 7, the flow path from the hydraulic pump to the motor is shown in FIG. 8. Is stopped and the motor is stopped, and thus the rotation direction of the motor is automatically changed according to the angle of the swash plate operated by the operation lever.
종래에는 상기 스와시 플레이트(10)가 슈 플레이트(11)와 완전히 면접촉된 상태로 배치되어 조작레버의 움직임에 대해 민감하게 작동하게 됨에 따라 모터의 회전이 완전히 정지되어야 하는 중립 구간의 폭이 줄어, 중립위치의 조작레버가 작업자의 부주의 등에 의해 의도하지 않은 작은 움직임에도 피스톤들이 작동하게 되어 사고가 발생되는 등 유압장치의 불안한 거동이 유발되는 문제점이 있었다. 일본 특허공개공보 소59-79078호(1984.05.08 공개)의 가변형 유압 액튜에이터에도 상기한 바와같이 스와시 플레이트와 슈 플레이트가 면대면으로 접촉된 배치구조로 되어 상기한 유압장치의 불안한 거동의 문제점이 있었다. 또한, 상기와 같이 조작레버에 민감하게 거동하는 움직임에 따라 급격한 맥동이 발생되어 유압 장치의 내구성 저하 및 압유 흐름의 비효율성의 문제점이 있었다. Conventionally, since the swash plate 10 is disposed in a state of being completely in surface contact with the shoe plate 11 to operate sensitively to the movement of the operation lever, the width of the neutral section in which the rotation of the motor must be completely stopped is reduced. , The operation lever of the neutral position has a problem that causes the unstable behavior of the hydraulic system, such as an accident caused by the pistons to operate even in the small movement unintended by the operator's carelessness. As described above, the variable hydraulic actuator of Japanese Patent Application Laid-Open No. 59-79078 (published on May 8, 1984) has an arrangement structure in which the swash plate and the shoe plate are in contact with each other in a face-to-face manner, thereby causing the problem of unstable behavior of the hydraulic device. there was. In addition, the rapid pulsation is generated in response to the movement sensitive to the operation lever as described above, there was a problem of reduced durability of the hydraulic device and inefficiency of the pressure oil flow.
이러한 문제점을 해결하기 위하여, 중립위치에서 작업자의 부주의에 의한 조작레버의 움직임에 대한 피스톤조립체의 작동의 미리 설정된 정도의 미세한 움직임에 대해 모터가 작동하지 않도록 하기 위한 구조개선이 요망되었다.In order to solve this problem, it has been desired to improve the structure so that the motor does not operate for a predetermined degree of fine movement of the operation of the piston assembly with respect to the movement of the operation lever inadvertently by the operator in the neutral position.
본 발명은 상기한 종래 콤바인이나 트랙터와 같은 차량에 제공된 정유압변속장치의 가변용량형 유압펌프에서 스와시 플레이트에 면접촉된 슈 플레이트의 배치 구조에 따른 문제점을 해결하기 위하여, 슈 플레이트와 접촉하는 스와시 플레이트의 표면에 경사각을 주어 슈 플레이트와 스와시 플레이트 사이에 유격을 형성하여 상기 유격에 대응된 구간에서 스와시 플레이트 조작 레버의 작동에 즉각적인 반응을 하지 않도록 개선된 스와시 플레이트 구조의 제공을 목적으로 한다.The present invention is to contact the shoe plate in order to solve the problem according to the arrangement of the shoe plate surface contact to the swash plate in the variable displacement hydraulic pump of the hydrostatic transmission device provided in a vehicle such as a conventional combine or tractor. By providing an inclination angle on the surface of the swash plate to form a play between the shoe plate and the swash plate, to provide an improved swash plate structure so as not to immediately react to the operation of the swash plate operating lever in the section corresponding to the play. The purpose.
본 발명의 다른 목적은 스와시 플레이트의 중립 확보를 위하여 복귀력이 개선된 스와시 플레이트 구조를 제공하는 것이다. Another object of the present invention is to provide a swash plate structure with improved return force for ensuring neutrality of the swash plate.
상기한 목적을 달성하기 위하여, 본 발명에 의한 정유압변속장치용 개선된 구조의 스와시 플레이트는 바디 속에서, 중앙의 홀을 관통하여 배치된 펌프샤프트를 중심으로 배치된 환형의 스와시 플레이트의 일측면에서 복수개의 피스톤 어셈블리들 각각에 연결되어 환상으로 배치된 슈 플레이트들이 접촉하도록 배치되고, 상기 슈 플레이트들 각각에 연결된 피스톤 어셈블리의 작동에 연동하여 밸브장치가 개폐되며, 조작레버의 작동에 따라 스와시 플레이트가 슈 플레이트에 접촉하여 피스톤 어셈블리와 대응된 밸브장치들을 선택적으로 작동시켜 모터를 구동하도록 된 정유압변속장치용 스와시 플레이트에 있어서, 상기 슈 플레이트에 대향된 상기 스와시 플레이트의 내측면은 중앙의 홀에 인접한 부분에서 반경방향 외측으로 갈 수록 슈 플레이트로 부터 멀어지도록 경사지게 형성되어, 상기 슈 플레이트는 스와시 플레이트의 중앙의 홀에 인접한 부분에서 스와시 플레이트와 선접촉되고, 모터가 정지된 중립위치에서, 조작레버의 조작에 의해 경사지는 스와시 플레이트에 대해 슈 플레이트가 선접촉된 상태에서 면접촉되는 시간 동안 지연되어 동작함에 따라 모터가 구동이 지연되도록 구성된다.In order to achieve the above object, the swash plate of the improved structure for the hydrostatic transmission according to the present invention has an annular swash plate arranged around a pump shaft disposed through a central hole in a body. In one side, the shoe plates connected to each of the plurality of piston assemblies are annularly arranged to contact each other, the valve device is opened and closed in conjunction with the operation of the piston assembly connected to each of the shoe plates, and according to the operation of the operation lever. A swash plate for a hydrostatic transmission in which a swash plate contacts a shoe plate and selectively operates a valve assembly corresponding to a piston assembly to drive a motor, the inner surface of the swash plate facing the shoe plate. From the portion adjacent to the center hole to the shoe plate It is formed to be inclined away from the shoe plate, the shoe plate is in linear contact with the swash plate at a portion adjacent to the hole in the center of the swash plate, and at the neutral position where the motor is stopped, the swash plate is inclined by the operation of the operating lever. The motor is configured to be delayed in driving as the shoe plate is delayed and operated during the time when the shoe plate is in surface contact with the shoe plate.
상기 스와시 플레이트가 슈 플레이트에 대하여 멀어지게 경사진 각도는 유압 펌프의 용량을 고려하여 선택하되 0.5° 내지 5.4°사이에서 선택되는 것이 바람직하다.The angle at which the swash plate is inclined away from the shoe plate is selected in consideration of the capacity of the hydraulic pump, but is preferably selected between 0.5 ° and 5.4 °.
상기 스와시 플레이트는, 스와시 플레이트의 회전축에 대하여 미리 설정된 각도의 경사각을 부여하도록 홀을 중심으로 양측에 형성된 두개의 고정핀들을 잇는 가상의 직선을 중심으로 양측에 각각 스프링 홀을 형성하고, 스와시 플레이트의 일측면에 대향하여 배치되는 슈 플레이트에도 상기 스와시 플레이트에 형성된 스프링 홀에 대응하여 대향된 위치에 스프링 홀을 형성하며, 상기 스와시 플레이트의 스프링 홀과 슈 플레이트의 스프링 홀 각각에 스프링의 양측 부분들이 각각 삽입되어 스프링을 장착하여 스와시 플레이트의 복귀력을 향상시키도록 구성되는 것이 바람직하다.The swash plate is formed with spring holes on both sides of an imaginary straight line connecting two fixing pins formed on both sides of the hole to give an inclination angle of a predetermined angle with respect to the rotation axis of the swash plate. The shoe plate disposed to face one side of the swash plate also forms a spring hole at a position opposite to the spring hole formed in the swash plate, and a spring in each of the spring hole of the swash plate and the spring hole of the shoe plate. Both side portions of the are preferably inserted into the spring is configured to improve the return force of the swash plate.
본 발명에 따라 피스톤 조립체와 밸브장치가 연결된 슈 플레이트에 대하여 스와시 플레이트가 선접촉된 상태에서 조작레버의 작동에 따라 스와시 플레이트가 슈 플레이트와 면접촉됨에 따라 연동하여 모터가 구동하도록 함으로써 상기 스와시 플레이트와 슈 플레이트의 선접촉에서 면접촉될 때 까지의 시간 동안 유압 모터의 구동이 지연되어 중립위치의 구간을 간편하게 확대되고, 이에 따라 종래 스와시 플레이트에 민감하게 반응하던 슈 플레이트의 구조와 비교하여 유압장치의 안전 사고와 급격한 동작이 방지됨에 따라 맥동 발생이 방지되어 제품 품질이 향상되는 효과가 있다.According to the present invention, the swash plate is in line contact with the shoe plate to which the piston assembly and the valve device are connected. The operation of the hydraulic motor is delayed during the time from the line contact between the sea plate and the shoe plate to the surface contact, so that the section of the neutral position is easily enlarged, and thus compared with the structure of the shoe plate, which was sensitive to the conventional swash plate. Therefore, the safety accident and sudden operation of the hydraulic system are prevented, so that the occurrence of pulsation is prevented, thereby improving the product quality.
도 1은 종래 정유압변속장치용의 유압 펌프와 유압 모터의 개략적인 구성도면.1 is a schematic configuration diagram of a hydraulic pump and a hydraulic motor for a conventional hydrostatic transmission.
도 2는 종래 스와시 플레이트와 슈 플레이트의 배치구조를 보여주는 개략적인 정유압변속장치용의 일체형 유압펌프와 유압모터 구성을 보여주는 단면도.Figure 2 is a cross-sectional view showing the configuration of the integrated hydraulic pump and hydraulic motor for a schematic hydrostatic transmission device showing a conventional arrangement of the swash plate and the shoe plate.
도 3과 도 4는 종래 정유압 변속장치에서 유압모터가 시계방향 회전시 조작레버와, 스와시 플레이트 및 그에 대응되는 펌프와 모터 작동상태도.3 and 4 is a view showing the operation lever, the swash plate and the pump and the motor corresponding to the operation when the hydraulic motor rotates clockwise in the conventional hydrostatic transmission.
도 5와 도 6은 유압모터가 반시계방향 회전시 조작레버와 스와시 플레이트 및 그에 대응되는 펌프와 모터의 작동 상태도.5 and 6 are views showing the operating state of the operating lever and the swash plate and the pump and motor corresponding thereto when the hydraulic motor rotates counterclockwise.
도 7과 도 8은 유압모터의 정지 위치시 조작레버와 스와시 플레이트 및 그에 대응되는 펌프와 모터의 작동상태도.7 and 8 are views showing the operating state of the operating lever and the swash plate and the pump and the motor corresponding to the stop position of the hydraulic motor.
도 9는 본 발명에 의한 개선된 구조의 스와시 플레이트 구조를 보여주는 단면도.9 is a cross-sectional view showing a swash plate structure of the improved structure according to the present invention.
도 10은 도 9의 스와시 플레이트의 사시도.10 is a perspective view of the swash plate of FIG. 9.
도 11은 본 발명의 다른 실시예에 의한 스와시 플레이트의 평면도.11 is a plan view of a swash plate according to another embodiment of the present invention.
도 12는 도 11의 스와시 플레이트와 슈 플레이트 사이에 스프링이 장착된 상태의 단면도.12 is a cross-sectional view of a spring mounted state between the swash plate and the shoe plate of FIG.
도 13 은 도 12의 슈 플레이트의 평면도와 단면도.FIG. 13 is a plan view and a sectional view of the shoe plate of FIG. 12; FIG.
도 14은 도 10의 스와시 플레이트의 변형예로서 스프링 홀이 두쌍이 형성된 것을 보여준다.FIG. 14 is a variation of the swash plate of FIG. 10 and shows two pairs of spring holes.
본 발명에 의한 정유압변속장치용 개선된 구조의 스와시 플레이트는 바디 속에서, 중앙의 홀을 관통하여 배치된 펌프샤프트를 중심으로 배치된 환형의 스와시 플레이트의 일측면에서 복수개의 피스톤 어셈블리들 각각에 연결되어 환상으로 배치된 슈 플레이트들이 접촉하도록 배치되고, 상기 슈 플레이트들 각각에 연결된 피스톤 어셈블리의 작동에 연동하여 밸브장치가 개폐되며, 조작레버의 작동에 따라 스와시 플레이트가 슈 플레이트에 접촉하여 피스톤 어셈블리와 대응된 밸브장치들을 선택적으로 작동시켜 모터를 구동하도록 된 정유압변속장치용 스와시 플레이트에 있어서, 상기 슈 플레이트에 대향된 상기 스와시 플레이트의 내측면은 중앙의 홀에 인접한 부분에서 반경방향 외측으로 갈 수록 슈 플레이트로 부터 멀어지도록 경사지게 형성되어, 상기 슈 플레이트는 스와시 플레이트의 중앙의 홀에 인접한 부분에서 스와시 플레이트와 선접촉되고, 모터가 정지된 중립위치에서, 조작레버의 조작에 의해 경사지는 스와시 플레이트에 대해 슈 플레이트가 선접촉된 상태에서 면접촉되는 시간 동안 지연되어 동작함에 따라 모터가 구동이 지연되도록 구성된다.The swash plate of the improved structure for the hydrostatic transmission according to the present invention has a plurality of piston assemblies in one side of the annular swash plate disposed around the pump shaft disposed through the central hole in the body. The shoe plates connected to each other and annularly arranged are in contact with each other, the valve device is opened and closed in response to the operation of the piston assembly connected to each of the shoe plates, and the swash plate contacts the shoe plates according to the operation of the operation lever. In the swash plate for the hydrostatic transmission is configured to selectively operate the valve assembly corresponding to the piston assembly to drive the motor, the inner surface of the swash plate opposed to the shoe plate in the portion adjacent to the center hole Inclined away from shoe plate toward radially outer side The shoe plate is in line contact with the swash plate at a portion adjacent to the center hole of the swash plate, and at the neutral position where the motor is stopped, the shoe plate is in line with the swash plate inclined by the operation of the operating lever. The motor is configured to delay driving as it is delayed and operated during the time of surface contact in the contacted state.
이하에서는 본 발명의 실시예를 도시한 첨부 도면을 참고하여 본 발명을 보다 상세히 설명하기로 한다.Hereinafter, with reference to the accompanying drawings showing an embodiment of the present invention will be described in more detail the present invention.
도 9와 도 10에 도시된 바와같이, 본 발명에 의한 정유압변속장치는 바디(100) 속에서 펌프샤프트(101)을 중심으로 배치된 환형의 스와시 플레이트(102)의 일측면(104)에서 슈 플레이트(103)가 선접촉되어 배치되고, 상기 슈 플에이트는 복수개의 피스톤 어셈블리(106)들 각각에 연결되어 환상으로 배치된다.As shown in Figure 9 and 10, the hydrostatic transmission apparatus according to the present invention is one side 104 of the annular swash plate 102 arranged around the pump shaft 101 in the body 100 In the shoe plate 103 is arranged in line contact, the shoe plate is connected to each of the plurality of piston assembly 106 is disposed in an annular shape.
이를 위하여, 도 9의 단면도에서 볼 수 있듯이, 상기 슈 플레이트(103)에 대향된 상기 스와시 플레이트(102)의 내측면은 중앙의 홀(105)에 인접한 부분에서 반경방향 외측으로 갈수록 슈 플레이트로 부터 멀어지도록 경사지게 형성되어 있다. 상기 경사도는 펌프의 용량 등을 감안하여 설정되는데 0.5° 내지 5.4°사이의 범위에서 선택되는 것이 바람직하다. To this end, as can be seen in the cross-sectional view of Figure 9, the inner surface of the swash plate 102 opposite to the shoe plate 103 is to the shoe plate toward the radially outward from the portion adjacent to the central hole 105 It is formed to be inclined away from. The inclination is set in consideration of the capacity of the pump and the like, and is preferably selected in the range of 0.5 ° to 5.4 °.
상기 스와시 플레이트의 내측면의 경사로 인하여 슈 플레이트는 홀(105)에 인접한 부분에서 선접촉되어 있어서, 예를들어 도 7에 도시된 중립 상태에서 도 4에 도시된 위치로 레버가 작동될 때, 경사진 스와시 플레이트에 대하여 슈 플레이트가 면접촉하게 되는 스와시 플레이트와 선택된 슈 플레이트 사이의 이격된 유격 거리에 대응하여 슈 플레이트에 연결된 피스톤 어셈블리의 작동 및 밸브의 개방이 지연됨에 따라 압유 공급이 지연되고 따라서, 모터가 시계방향으로 회전하는 것이 지연된다.Due to the inclination of the inner surface of the swash plate, the shoe plate is in line contact at the portion adjacent to the hole 105, so that, for example, when the lever is operated to the position shown in FIG. 4 in the neutral state shown in FIG. In response to the spaced clearance distance between the swash plate and the selected shoe plate with which the shoe plate is in surface contact with respect to the inclined swash plate, the operation of the piston assembly connected to the shoe plate is delayed and the opening of the valve is delayed. Therefore, the rotation of the motor clockwise is delayed.
또한, 도 9에 도시된 중립 상태에서 도 6에 도시된 위치로 레버가 작동되면 경사진 스와시 플레이트의 표면에서 선택된 슈 플레이트가 선 접촉된 상태에서 면접촉되는 상태까지의 유격 거리에 대응된 시간동안 지연된 다음 피스톤 어셈블리의 작동으로 대응된 밸브가 개방되어 모터로의 압유가 공급되어 모터는 반시계방향으로 회전하게 된다. Further, when the lever is operated to the position shown in FIG. 6 in the neutral state shown in FIG. 9, the time corresponding to the clearance distance from the surface of the inclined swash plate to the state in which the selected shoe plate is in surface contact with the line contact state During the delay, the corresponding valve is opened by the operation of the piston assembly to supply pressure oil to the motor, which causes the motor to rotate counterclockwise.
도 11 내지 도 13에 도시된 본 발명의 다른 실시예는, 스와시 플레이트(102)의 일측면(104)에는 스와시 플레이트의 중립 확보를 위하여 스와시 플레이트의 회전축에 대하여 미리 설정된 각도의 경사각을 부여하도록 홀(105)을 중심으로 양측에 형성된 두개의 고정핀(110)들을 잇는 가상의 직선을 중심으로 양측에 각각 하나의 스프링 홀(115)을 형성하고, 스와시 플레이트의 일측면(104)에 대향하여 배치되는 슈 플레이트(103)에도 상기 홀(115)에 대응하여 대향된 위치에 스프링 홀(117)을 형성하며, 상기 스와시 플레이트의 스프링 홀(115)과 슈 플레이트의 스프링 홀(117) 각각에 스프링(120)의 양측 부분들이 각각 삽입되어 장착된다. In another embodiment of the present invention illustrated in FIGS. 11 to 13, one side 104 of the swash plate 102 has an inclination angle of a predetermined angle with respect to the axis of rotation of the swash plate to ensure neutrality of the swash plate. One spring hole 115 is formed at both sides of an imaginary straight line connecting two fixing pins 110 formed at both sides with respect to the hole 105, and one side surface 104 of the swash plate. The spring plate 117 is formed at a position opposite to the hole 115 in the shoe plate 103 disposed to face the spring 115, and the spring hole 115 of the swash plate and the spring hole 117 of the shoe plate are formed. Both sides of the spring 120 are respectively inserted and mounted thereto.
상기 슈 플레이트(103)에 대향된 상기 스와시 플레이트(102)의 내측면은 중앙의 홀(105)에 인접한 부분에서 반경방향 외측으로 갈수록 슈 플레이트로 부터 멀어지도록 0.5° 내지 5.4°사이의 범위에서 경사지게 형성됨에도 스와시 플레이트는 상기 스프링의 반력에 의해 어느 쪽으로든지 경사지지 않고 균형이 유지될 수 있다.The inner surface of the swash plate 102 opposite the shoe plate 103 is in a range between 0.5 ° and 5.4 ° so as to move away from the shoe plate toward the radially outward at a portion adjacent the central hole 105. Even when formed to be inclined, the swash plate may be balanced without being inclined to either side by the reaction force of the spring.
도 14에는 스와시 플레이트의 일측면(104)에 두쌍의 스프링 홀(115)들을 형성한 변형예가 도시되어 있으며, 이 경우에도 스와시 플레이트의 홀(105)을 중심으로 양측에 형성된 두개의 고정핀(110)들을 잇는 가상의 직선을 중심으로 양측에 각각 두개의 스프링 홀을 형성하고, 아울러 슈 플레이트에도 대향된 면에 동일한 수의 스프링 홀이 형성된다. 14 shows a variation in which two pairs of spring holes 115 are formed at one side 104 of the swash plate, and in this case, two fixing pins formed at both sides around the hole 105 of the swash plate are shown. Two spring holes are formed on both sides of an imaginary straight line connecting the 110, and the same number of spring holes are formed on the opposite surface of the shoe plate.
정유압변속장치는 레버나 페달 조작으로 기동될 때, 즉 레버나 페달을 놓거나 떼었을 때 자동으로 중립으로 복귀디도록 하는 복귀력이 제공되지만 이러한 복귀력이 여러 요인으로 인해 기동하려고 하는 조작력과 같거나 약할 경우 스와시 플레이트가 복귀되지 않거나 더 큰 각도로 기울어져 기동 변위가 더 커지게 되어 복귀력이 조작력 보다 작게 되면 제품의 안정성에 치명적인 문제가 발생될 수 있게 된다. Hydrostatic transmissions are provided with a return force that automatically returns to neutral when actuated by lever or pedal operation, ie by releasing or releasing the lever or pedal. If it is weak or weak, the swash plate does not return or is inclined at a larger angle, resulting in greater maneuvering displacement. If the return force is smaller than the operating force, a critical problem may occur in the stability of the product.
이러한 문제는 상기한 실시예에서 스와시 플레이트와 슈 플레이트 사이에 제공되는 스프링의 반력에 의해 제공되는 복귀력으로 스와시 플레이트의 중립 균형이 향상됨으로서 해소되고, 따라서 제품의 안정성을 향상된다.This problem is solved in this embodiment by improving the neutral balance of the swash plate with the return force provided by the reaction force of the spring provided between the swash plate and the shoe plate, thus improving the stability of the product.
이로써, 예를들어 작업자가 중립위치에서 부주의에 의해 조작레버를 잘못 건드리게 되더라도 상기한 유격 거리만큼 작동하지 않고 조작레버에 의해 스와시 플레이트가 완전히 젖혀져 면대면 접촉이 이루어질 때 까지 피스톤 조립체와 밸브의 급격한 거동이 발생되지 않게 되고, 스와시 플레이트는 안정되게 위치가 유지되어 종래와 같이 중립구간에서 급격한 변속으로 인하여 맥동과 충격이 발생되지 않고 안전사고가 발생되지 않게 된다.Thus, for example, if the operator inadvertently touches the operating lever in a neutral position, the piston assembly and valve will not operate until the swash plate is fully flipped by the operating lever and the face-to-face contact is made. Sudden behavior of the swash plate is not generated, and the swash plate is stably maintained in position so that pulsation and impact are not generated due to a sudden shift in the neutral section as in the prior art, and safety accidents do not occur.
본 발명은 예를들어 콤바인이나 트랙터 등에서 레버조작에 의해 정유압변속장치의 유압펌프에 제공된 스와시 플레이트를 슈 플레이트에 접촉시켜 유압모터의 작동을 제어함에 있어, 상기 스와시 플에이트의 접촉면을 경사면으로 형성하여 중립위치에서는 슈 플레이트가 스와시 플레이트에 선접촉된 다음 레버 조작에 의해 면접촉되면서 피스톤 조립체가 작동하도록 함으로써 선접촉에서 면접촉까지의 시간 동안 유압장치의 거동이 지연되도록 기존의 정유압변속장치에 큰 구조변경없이 간편하게 적용하여 이용될 수 있다.According to the present invention, the contact surface of the swash plate is inclined when the swash plate provided to the hydraulic pump of the hydrostatic transmission is contacted to the shoe plate by lever operation in a combine or a tractor to control the operation of the hydraulic motor. In the neutral position, the shoe plate is in line contact with the swash plate, and then the piston assembly is operated while the surface is contacted by the lever operation so that the behavior of the hydraulic device is delayed for the time from the line contact to the surface contact. It can be easily applied to the transmission without major structural changes.

Claims (3)

  1. 바디(100) 속에서, 중앙의 홀(105)을 관통하여 배치된 펌프샤프트(101)를 중심으로 배치된 환형의 스와시 플레이트(102)의 일측면(104)에서 복수개의 피스톤 어셈블리(106)들 각각에 연결되어 환상으로 배치된 슈 플레이트(103)들이 접촉하도록 배치되고, 상기 피스톤 어셈블리의 작동에 연동하여 밸브장치가 개폐되며, 조작레버의 작동에 따라 스와시 플레이트가 슈 플레이트에 접촉하여 피스톤 어셈블리(106)와 대응된 밸브장치들을 선택적으로 작동시켜 모터를 구동하도록 된 정유압변속장치용 스와시 플레이트에 있어서,In the body 100, a plurality of piston assemblies 106 on one side 104 of an annular swash plate 102 arranged around a pump shaft 101 arranged through a central hole 105. The shoe plates 103 connected to each of them are annularly arranged to contact each other, the valve device is opened and closed in response to the operation of the piston assembly, and the swash plate contacts the shoe plates according to the operation of the operation lever. 10. A swash plate for a hydrostatic transmission that is configured to selectively drive valve assemblies associated with assembly 106 to drive a motor.
    상기 슈 플레이트(103)에 대향된 상기 스와시 플레이트(102)의 내측면은 중앙의 홀(105)에 인접한 부분에서 반경방향 외측으로 갈 수록 슈 플레이트로 부터 멀어지도록 경사지게 형성되어, 상기 슈 플레이트는 스와시 플레이트의 중앙의 홀(105)에 인접한 부분에서 스와시 플레이트와 선접촉되고, 모터가 정지된 중립위치에서, 조작레버의 조작에 의해 경사지는 스와시 플레이트에 대해 슈 플레이트가 선접촉된 상태에서 면접촉되는 시간 동안 지연되어 동작함에 따라 모터가 구동이 지연되도록 구성된 것을 특징으로 하는 정유압변속장치용 스와시 플레이트.The inner surface of the swash plate 102 opposed to the shoe plate 103 is formed to be inclined away from the shoe plate toward the radially outer side in a portion adjacent to the central hole 105, so that the shoe plate is The shoe plate is in line contact with the swash plate at the portion adjacent to the hole 105 in the center of the swash plate, and in contact with the swash plate which is inclined by the operation lever in the neutral position where the motor is stopped. The swash plate for the hydrostatic transmission, characterized in that the motor is configured to be delayed as the operation is delayed during the time of the surface contact.
  2. 제 1항에 있어서, 상기 스와시 플레이트가 슈 플레이트에 대하여 멀어지게 경사진 각도는 0.5° 내지 5.4°사이에서 선택되는 것을 특징으로 하는 정유압변속장치용 스와시 플레이트.The swash plate of claim 1, wherein an angle at which the swash plate is inclined away from the shoe plate is selected between 0.5 ° and 5.4 °.
  3. 제 1항 또는 2항에 있어서, 상기 스와시 플레이트의 회전축에 대하여 미리 설정된 각도의 경사각을 부여하도록 홀(105)을 중심으로 양측에 형성된 두개의 고정핀(110)들을 잇는 가상의 직선을 중심으로 양측에 각각 스프링 홀(115)을 형성하고, 스와시 플레이트의 일측면(104)에 대향하여 배치되는 슈 플레이트(103)에도 상기 홀(115)에 대응하여 대향된 위치에 스프링 홀(117)을 형성하며, 상기 스와시 플레이트의 스프링 홀(115)과 슈 플레이트의 스프링 홀(117) 각각에 스프링(120)의 양측 부분들이 각각 삽입되어 스프링을 장착하여 스와시 플레이트의 복귀력을 향상시키도록 된 것을 특징으로 하는 정유압변속장치용 스와시 플레이트.According to claim 1 or 2, wherein the center of the imaginary straight line connecting the two fixing pins 110 formed on both sides with respect to the hole 105 to give a predetermined angle of inclination with respect to the axis of rotation of the swash plate Spring holes 115 are formed at both sides, and the spring plate 117 is disposed at a position opposite to the hole 115 in the shoe plate 103 disposed to face one side 104 of the swash plate. Both sides of the spring 120 are inserted into each of the spring hole 115 of the swash plate and the spring hole 117 of the shoe plate, respectively, to mount the spring to improve the return force of the swash plate. A swash plate for a hydrostatic transmission, characterized in that.
PCT/KR2013/004090 2012-10-11 2013-05-09 Swashplate with improved structure for hydrostatic speed change device WO2014058120A1 (en)

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CN107630809A (en) * 2017-10-11 2018-01-26 中国航发西安动力控制科技有限公司 A kind of swash plate for axial plunger pump
KR101867529B1 (en) 2017-11-21 2018-06-14 황종원 Piston pump
CN113565731B (en) * 2021-08-08 2022-11-25 西南石油大学 Carry on hydrogen compressor of plunger type pressurized cylinder

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