WO2015183011A1 - Rear axle case of agricultural work vehicle and rear axle assembly of agricultural work vehicle, including same - Google Patents

Rear axle case of agricultural work vehicle and rear axle assembly of agricultural work vehicle, including same Download PDF

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Publication number
WO2015183011A1
WO2015183011A1 PCT/KR2015/005356 KR2015005356W WO2015183011A1 WO 2015183011 A1 WO2015183011 A1 WO 2015183011A1 KR 2015005356 W KR2015005356 W KR 2015005356W WO 2015183011 A1 WO2015183011 A1 WO 2015183011A1
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WO
WIPO (PCT)
Prior art keywords
rear axle
case
work vehicle
differential
reduction gear
Prior art date
Application number
PCT/KR2015/005356
Other languages
French (fr)
Korean (ko)
Inventor
박동욱
이재홍
Original Assignee
대동공업 주식회사
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
Priority claimed from KR1020140131817A external-priority patent/KR101876886B1/en
Application filed by 대동공업 주식회사 filed Critical 대동공업 주식회사
Priority to CN201580005621.1A priority Critical patent/CN106414141B/en
Priority to US15/112,863 priority patent/US9919558B2/en
Publication of WO2015183011A1 publication Critical patent/WO2015183011A1/en

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D41/00—Combines, i.e. harvesters or mowers combined with threshing devices
    • A01D41/12—Details of combines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/28—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or type of power take-off
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K25/00—Auxiliary drives
    • B60K25/06—Auxiliary drives from the transmission power take-off

Definitions

  • the present invention relates to a rear axle case of an agricultural work vehicle and a rear axle combination of an agricultural work vehicle, and more particularly, to a rear axle case of an agricultural work vehicle in which a rear axle for transmitting a final shifted driving power to a wheel is accommodated. It is about rear axle combination of agricultural work vehicle to do.
  • the agricultural work truck called 'Tractor' is similar in structure to the general cars, but it is equipped with a powerful engine, so it is mainly used for cultivation because it has good traction and is strong. It is configured to selectively attach or detach various types of work machines.
  • the shift section should be wide in order to optimally adjust the traveling speed and the rotational speed of the power take-off shaft (PTO shaft) according to the soil quality of the work target.
  • PTO shaft power take-off shaft
  • FIG. 1 is a structural diagram showing a mission combination (shift combination) applied to a conventional agricultural work vehicle.
  • a conventional mission combination is largely divided into a mission unit 1 and a rear wheel drive unit 9 (rear axle combination).
  • the mission unit 1 is, again, a shuttle transmission unit 2 for forward and reverse shifts, a peripheral speed unit 3 and a sub transmission unit 4 for realizing a wide range of shift stages, a front turn wheel function and a front wheel for driving the front wheels. It is divided into the drive part 5, and the rear drive part 6 distributes the power which the mission part 1 finally shifted to the left and right rear wheels suitably.
  • the shuttle transmission portion 2 constituting the mission portion 1 is configured in a hydraulic multi-plate clutch system in which a selective power connection is realized by the hydraulic oil which is allowed to flow by the driver lever operation.
  • the peripheral speed portion 3 is composed of a multi-stage (four-stage) gear of the synchronizer type, and the sub-speed transmission portion 4 can be selectively bitten by moving a pair of gears having different gear ratios in conjunction with the lever operation. have.
  • the front wheel drive unit 5 is configured as a hydraulic multi-plate clutch, similar to the shuttle transmission unit 2, and a mission case 8 which provides a space in which the various parts constituting the mission unit 1 and the rear drive unit 6 are sealed. Protected by).
  • the mission case 8 may be filled with a liquid lubricant so that smooth transmission and power transmission may be performed, and friction and wear between parts may be prevented.
  • Reference numeral 7 denotes a PTO drive unit which draws engine power out of the gas in order to use the power output from the engine as power for driving the work machine
  • 35 denotes a counter shaft in which gears for shifting are freely rotated or rotated freely.
  • Figure 2 is a view showing the rear differential (rear axle combination) applied to the conventional mission combination.
  • the rear wheel part 9 includes a rear wheel part case 90 and a rear wheel part case in which a differential device 91 for distributing the driving power shifted according to the driving situation is appropriately distributed to the left and right rear wheels.
  • 90 is composed of a brake case 93 to protect the brake unit 92, which is assembled to both left and right sides and spaced apart from both sides of the differential, and a rear axle case 96 in which the rear axle 95 is installed.
  • the ring gear (bevel driven gear 910) constituting the differential device 91 receives power from a bevel pinion (bevel drive gear, not shown) that outputs the final shifted power through a peripheral speed and a sub-shift process.
  • the device 91 and the differential shaft 94 connected thereto are rotated, and the rear axle 95 connected to the differential shaft 94 is rotated so that the left and right rear wheels rotate at the final speed.
  • the case constituting the rear differential unit (rear axle combination) applied to a conventional agricultural work vehicle is a rear axle case 96 coupled to the rear differential unit case 90, the brake case 93, and the brake case 93.
  • the configuration is complicated and the number of parts is disadvantageous in terms of cost reduction, and there is a problem that is difficult to assemble.
  • the problem to be solved by the present invention is to reduce the number of parts, reduce the cost, and improve device assembly through the integration of components.
  • Another problem to be solved by the present invention is to realize the compactness of the device through efficient component placement in a limited space.
  • Another problem to be solved by the present invention is to provide a rear axle combination of a farming work vehicle structure that can additionally install a Roll Over Protective Structure (ROPS) for driver protection without securing a separate space.
  • ROPS Roll Over Protective Structure
  • a reduction gear cover part provided integrally with the rear axle cover part side;
  • a differential shaft cover part integrally formed at the front end of the reduction gear cover part to cover the differential shaft extending out of the rear differential part case;
  • a brake unit cover part integrally provided at an opening side of the differential shaft cover part in a form of covering one side opening of the differential shaft cover part to form a space in which a multi-plate brake unit can be installed between the rear differential part case and the cover unit. It provides a rear axle case of the agricultural work vehicle including.
  • the reduction gear cover portion is provided with a reduction gear accommodating space for arranging the reduction gear connected to the differential shaft side so as to be capable of power transmission, and the side of the rear axle cover portion opposite to the rear differential case case. This can be an open configuration.
  • the differential shaft cover portion the differential shaft receiving space for communicating with the inner space of the reduction gear cover portion for receiving the differential shaft extending out of the rear differential unit case; And a bearing fixing part in which a bearing member for rotatably supporting the differential shaft is fixed.
  • a bearing fixing surface may be provided on a main surface of the center through hole through which the differential shaft penetrates the center of the cover of the brake unit and the differential shaft penetrates.
  • the rear axle case according to an aspect of the present invention may further include a brake operation lever mounting portion integrally formed around the differential shaft cover portion.
  • the center of the reduction gear cover portion, the center of the differential shaft cover portion, and the height of the center of the rear axle cover portion may be the same configuration.
  • the diameter of the reduction gear cover portion may be larger than the differential shaft cover portion and the rear axle cover portion, it is preferable to configure the center of the rear axle cover portion and the center of the reduction gear cover portion.
  • the rear axle cover portion and the reduction gear cover portion ROPS mounting unit for mounting the ROPS (Roll Over Protective Structure) formed integrally on the outer edge; may further include a.
  • a lower link mounting unit integrally formed on the outer axle of the rear axle cover portion or the reduction gear cover portion below the ROPS mount; And a check link attaching surface formed on an adjacent side of the lower link attaching stand.
  • the apparatus may further include a seat frame support mount formed integrally with the upper edge of the reduction gear cover and providing a mounting surface for installing the seat frame support.
  • the rear axle case according to the one side is provided in a pair of left and right, rear rear case case disposed between the rear axle case and the rear vehicle in the rear vehicle case
  • a rear axle combination of an agricultural work vehicle including a transmission unit disposed to be capable of transmitting power to each other over a shaft case and a brake unit disposed between the rear axle case and the rear wheel case to generate a braking force for stopping the vehicle.
  • the driver protection structure (ROPS) that is supported on the ROPS mount is formed integrally with the outer edge of the rear axle case may further include.
  • the apparatus may further include a seat frame support installed at a seat frame support mounting hole integrally formed at an upper outer edge of the rear reduction gear cover of the rear axle case.
  • the transmission members may include a differential device disposed in a rear differential case for distributing driving force to both wheels, a differential shaft extending left and right from the differential to partially extend the rear differential case, and a reduction gear of the rear axle case.
  • a reduction gear which is accommodated in the cover part and is connected to the differential shaft extending out of the rear driving part case so as to transmit power, and the rear axle which is coupled to the reduction gear and is rotatably disposed in the rear axle cover part of the rear axle case; Can be configured.
  • it may further comprise a differential lock to limit the deflected power transfer of the differential.
  • the brake unit is a dry multi-plate brake type in which a rotating disk and a fixed side plate are sequentially arranged at predetermined intervals, and a rotating plate having a plurality of ball grooves in a circumferential direction in which dent depth gradually increases on one surface thereof, and a ball groove of a rotating plate. And it may be a configuration including a steel ball interposed between the ball groove on the rear side of the case portion corresponding to the ball groove.
  • an input end through which a rotational force for generating braking force is input may be integrally provided at a part of the circumference of the rotating plate, and may further include an operation cam having a cam surface in contact with the input end.
  • the contact surface of the input end in contact with the actuating cam is a flat surface
  • the actuating cam may be composed of a flat portion in contact with the contact surface of the input end and an arc-shaped curved portion of the back surface of the flat portion.
  • the rear axle case surrounding the rear axle and the brake case for protecting the brake unit are provided in an integrated form into a single case, so that the components can be reduced in comparison with the conventional structure in which the two components are separated. It can achieve price competitiveness by simplifying the cost and reducing the cost, and can increase the ease of assembly.
  • FIG. 1 is a structural diagram of a mission combination (shift combination) of a conventional agricultural work vehicle.
  • Figure 2 is a cross-sectional view of the rear vehicle is applied to the conventional mission combination of FIG.
  • Figure 3 is a side view of a farming vehicle in accordance with the present invention.
  • FIG. 4 is a plan view of a farm work vehicle according to the present invention.
  • FIG. 5 is a perspective view of a rear axle case according to an aspect of the present invention applied to the agricultural work vehicle of FIG.
  • Figure 6 is a perspective view of the rear axle case shown in Figure 5 from another angle.
  • Figure 7 is a left side view of the rear axle case shown in Figure 5;
  • FIG. 8 is a right side view of the rear axle case shown in FIG.
  • FIG. 9 is a cross-sectional view of the rear axle case shown in FIG.
  • FIG. 10 is a perspective view of the rear axle combination of the agricultural work vehicle including the rear axle case shown in FIG.
  • FIG. 11 is a side cross-sectional view of the rear axle combination of the agricultural work vehicle including the rear axle case illustrated in FIG. 5, cut in the vehicle width direction.
  • FIG. 12 is an enlarged view of an 'A' part in which a brake unit is installed in FIG. 11;
  • FIG. 13 is an enlarged perspective view of a portion where the rotating plate of the brake unit and the operating cam are in cam contact with each other;
  • FIG. 15 is a rear view of the driver protection structure (ROPS) mounted on the ROPS mount shown in FIG. 14;
  • ROPS driver protection structure
  • FIG. 16 is a perspective view illustrating a lower link and a check link and a driver's seat frame support for connecting a rear work machine to a rear axle case constituting a rear axle combination of a farm work vehicle;
  • Figure 3 is a side view of the agricultural work vehicle according to the present invention
  • Figure 4 is a plan view of the agricultural work vehicle shown in FIG.
  • the overall configuration of the agricultural work vehicle related to the present invention will be first outlined with reference to these drawings.
  • the agricultural work vehicle according to the present invention includes an engine room 30 covered with a bonnet in front of the traveling body.
  • the engine room 30 includes the engine 50 and other main parts related to driving the vehicle.
  • the engine room 30 includes a steering wheel for omnidirectional steering (not shown) at the rear of the engine room 30, various levers for operating the aircraft, A driver's seat 10 equipped with buttons, switches, and the like is disposed.
  • a three-point elevating device 70 is provided for towing connection of various work machines.
  • the traveling body provided with the engine room 30, the driver's seat 10, and the lifting device 70 is a pair of steering front wheels FW arrange
  • the front wheel (FW) is connected to the bottom of the engine frame (2) in front of the body, and the front axle housing (40) in which the front wheel (FW) has a pair of left and right differential shafts for power transmission is disposed in the left and right width directions. do.
  • the rear wheels (RW) disposed at the rear of the body is coupled to the tip of the exposed portion of the rear axle 65 surrounded by the rear axle case (65) on both sides of the rear of the rear rear case part (60).
  • the engine frame 20 and the rear driving unit case 60 are connected to each other through a mission case 8 disposed at the bottom of the driver's seat in the longitudinal direction of the vehicle to form a rigid chassis, and the rear driving unit case 60 is formed.
  • a differential device (described later) for distributing the final shifted power to the left and right rear wheels is provided via a transmission device arranged in the mission case 8.
  • the rear axle case 66 includes a rear axle cover portion 660 having a hollow tube shape surrounding the rear axle 65 and the rear axle cover. It includes a reduction gear cover portion 662 integrally provided on the side portion 660. A differential shaft cover portion 664 is integrally formed on one side of the reduction gear cover portion 662 to cover the differential shaft 62 (see FIG. 11) extending out of the rear differential case 60.
  • the brake unit cover part 666 is integrally provided on the opening side of the differential shaft cover part 664 in a form covering the opening of one side of the differential shaft cover part 664, and is provided by the brake unit cover part 666.
  • a space in which the multi-plate brake unit 68 may be installed is formed between the rear differential case 60 and the brake unit cover 666.
  • the reduction gear cover part 662 is provided with a reduction gear 63 accommodating space S1 in which a reduction gear 63 (see FIG. 11) is connected to the differential shaft 62 so as to transmit power.
  • the reduction gear cover part 662 has an opening in a side contacting the rear drive part case 60 opposite to the rear axle cover part 660, and the reduction gear 63 enters through the opening to receive the accommodation space ( It is located in S1).
  • the differential shaft cover 664 communicates with the inner space of the reduction gear cover portion 662, that is, the reduction gear accommodation space S1 and extends out of the rear differential case 60.
  • a bearing fixing part in which a differential shaft 62 accommodating space S2 is formed and a bearing member is fixed so that an end of the differential shaft 62 disposed in the differential shaft 62 accommodating space is rotatably supported. 665 is provided.
  • the height of the center C1 of the reduction gear cover 662, the center C2 of the differential shaft cover 664, and the center C3 of the rear axle cover 660 are the same, and the differential shaft cover 664 is the same. And a diameter of the reduction gear cover 662 is larger than that of the rear axle cover 660.
  • the center C3 of the rear axle cover 660 and the center C1 of the reduction gear cover 662 coincide with each other.
  • a through hole 667 is formed in the center of the brake unit cover part 666 so that the differential shaft 62 extending to the rear differential case 60 is penetrated, and the center through which the differential shaft 62 penetrates.
  • a bearing fixing surface 668 is formed on a main surface of the through hole 667, and a bearing member for rotatably supporting a part of the differential shaft 62 is fitted and fixed in a press-fit manner.
  • the rear axle case 66 may further include a brake operating lever mounting portion 669 integrally formed around the differential shaft cover portion 664.
  • the rear axle cover part 660 or the reduction gear cover part 662 may further include an ROPS mounting unit 661 for mounting a driver protection structure (ROPS; Roll Over Orotective Structure).
  • ROPS driver protection structure
  • the rear axle case 66 may further include a lower link mounting unit 670 on the outer edge of the rear axle cover portion 660 or the reduction gear cover portion 662 below the ROPS mount 661. It may be further provided integrally, the check link attaching surface 672 may be further formed on the side adjacent to the lower link mounting (670). And it may further include a seat frame support mounting hole 674 integrally formed on the upper outer edge of the reduction gear cover portion 662.
  • the lower link attachment 670 is provided with a lower link 72 (refer to FIG. 16) for connection with a rear work machine such as a rake and a rotavator, and the lower link is mounted on the check link attachment surface 672.
  • Check links 72 (see FIG. 16) for adjusting the left and right spacing of the link 72 may be attached.
  • the seat frame support mounting hole 674 is provided with a seat frame support for supporting a seat frame (not shown) at the bottom of the driver's seat 11 (see FIG. 3) (see FIG. 16).
  • a rear axle combination including a rear axle case according to an aspect of the present invention will be described below with reference to FIG.
  • FIG. 10 is a perspective view of the rear axle combination of the agricultural work vehicle including the rear axle case 66 illustrated in FIG. 4, and FIG. 11 is a rear axle combination of the agricultural work vehicle including the rear axle case illustrated in FIG. 4. It is the horizontal cross section figure cut in the vehicle width direction.
  • the rear axle combination 6 includes the rear axle case 66 which is disposed opposite to the left and right, the rear axle case 60 disposed between the rear axle cases 66, Transmission members disposed to be capable of transmitting power from the rear axle case 60 to the rear axle case 66, and a brake unit 68 mounted between the rear axle case 66 and the rear axle case 60. do.
  • the transmission members include a differential device 61 disposed in the rear differential case 60 and a pair of left and right differential shafts 62 extending from the differential device 61 to the left and right sides.
  • the reduction gear 63 is accommodated in the reduction gear cover portion 662 of the rear axle case 66 and coupled to the differential shaft 62 so as to transmit power, and the reduction gear 63 is coupled to the rear axle case 66.
  • the rear axle 65 extends through the inside and out of the case.
  • the differential device 61 functions to distribute the driving force to both wheels (left and right rear wheels) and is integral with the differential case 610, the differential pinion 612 and the differential case 610 disposed in the differential case 610.
  • Such a differential device 61 is a known technique, and thus a detailed description of more specific configuration and operation thereof will be omitted.
  • Power distributed through the differential device 61 is transmitted to the differential shaft 62 extending to the left and right sides of the differential device 61 through the side gear 616. And it is transmitted to the reduction gear 63 which is connected to the differential shaft 62 so as to transmit power within the differential shaft cover portion 664 of the rear axle case 66, the rear axle along the rear axle cover portion 660 It is transmitted to the wheels (rear wheels) via a rear axle 65 extending out of the case 66.
  • Reference numeral 64 denotes a differential fixing device that limits the deflected power transmission of the differential device 61.
  • Differential fixing device 64 is to solve the phenomenon that the driving force is applied only to the other side of the wheel with a relatively low load in the work situation in which the load is biased only on one wheel, the differential shaft 62 and the differential case ( 610 is interlockably connected so that the two differential shafts 62 can be rotated at the same speed.
  • the differential fixing device 64 preferably includes a differential fork shaft 640 connected to a differential fixing lever (not shown), a differential fork 642 connected to the differential fork shaft 640 so as to be interlocked, and one side (in the drawing). Left) It is composed of a differential shift 644 is disposed rotatably on the differential shaft 62 and moves along the differential shaft 62, the differential shift 644 in conjunction with the retraction movement of the differential fork ( By moving 62, the differential shaft 62 and the differential case 610 are integrally rotatable.
  • differential fixing device 64 when the differential fixing device 64 is operated by stepping on a differential fixing lever (not shown), the differential fork shaft 640 rotates and the differential fork 642 is moved in the axial direction.
  • the differential shift 644 is moved in a direction in which the differential shaft 62 and the differential case 610 are directly connected to each other so as to transmit power, thereby performing differential fixation.
  • a brake unit will be described below with reference to FIG. 12.
  • the brake unit 68 is a dry multi-plate brake type in which the rotating side disk 680 and the fixed side plate 682 are sequentially disposed at predetermined intervals, and the ball groove gradually increasing the depth of depression on one surface thereof.
  • Steel balls (not shown) between the rotating plate 684 formed a plurality of (H) in the circumferential direction, the ball groove (H) of the rotating plate 684 and the ball groove (side not shown) of the side of the rear drive unit case 60 corresponding to the ball groove (H) It consists of a structure through B).
  • a part of the circumference of the rotating plate 684 is integrally provided with an input end 685 for inputting a rotational force for generating a braking force, and the input end 685 is provided with a cam surface of the operation cam 67 installed in the brake operation lever mounting portion 669.
  • Cam contact In this case, as shown in FIG. 13, the contact surface of the input end 685 contacting the actuating cam 67 is a flat surface, and the actuating cam 67 is a flat part 670 and the planar part 670 contacting the contact surface of the input end 685. And an arc-shaped curved portion 672 on the back side.
  • FIG. 14 is an enlarged view of a portion in which the driver protection structure ROPS mount is formed
  • FIG. 15 is a view of the driver protection structure ROPS mounted on the ROPS mount shown in FIG.
  • the ROPS mount 661 which has been briefly described above, is integrally formed at the outer edge rear portion of the rear axle case 66.
  • a ROPS (Roll Over Orotective Structure) 69 is supported on the ROPS mount 661 to protect the driver from an overturning of the vehicle.
  • the ROPS mount 661 is not limited to the illustrated form because the ROPS mount 661 may vary depending on the cross-sectional shape or the overall structure of the driver protection structure 69, and the ROPS mount 661 is disposed at a lower end of the driver protection structure 69. ) May be provided integrally with the mounting bracket 690 to form a mounting surface for coupling with the).
  • FIG. 16 is a perspective view illustrating a lower link, a check link, and a driver seat frame frame support for connecting a rear work machine to a rear axle case constituting the rear axle combination of the agricultural work vehicle.
  • the rear axle combination includes a left side installed in the lower link mounting portion 670 formed in the rear axle cover portion or the reduction gear cover portion under the ROPS mount 661. It may further include a pair of lower link (72).
  • the lower link 72 is configured to be connected to a rear work device such as a rake and a rotavator at the rear of a farm work vehicle so that the length can be adjusted according to the work machine shape.
  • the check link attachment surface 672 formed at the adjacent side of the lower link mounting stand 670 may be attached with a check link 72 for adjusting the left and right spacing between the left and right pair of lower links 72.
  • the apparatus may further include a seat frame support 110 mounted to the seat frame support mounting hole 674 and supporting a seat frame (not shown) at the bottom of the driver's seat 11 (see FIG. 3).
  • the rear axle case surrounding the rear axle and the brake case protecting the brake unit are provided in an integrated form as a single case, thereby reducing the number of parts compared to the conventional structure in which the two components are separated. It can achieve price competitiveness by simplifying the configuration and reducing the cost, and can increase the ease of assembly.
  • ROPS driver protection structure

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Motor Power Transmission Devices (AREA)
  • Arrangement Of Transmissions (AREA)
  • Retarders (AREA)

Abstract

Disclosed are a rear axle case of an agricultural work vehicle and a rear axle assembly including the same. The rear axle case of an agricultural work vehicle, according to one aspect of the present invention, comprises: a rear axle cover part, having a hollow pipe shape, for surrounding a rear axle; a reduction gear cover part integrally provided at the side of the rear axle cover part; a differential shaft cover part integrally formed at the front end of the reduction gear cover part so as to cover a differential shaft extending to the outside of a rear differential part case; and a brake unit cover part integrally provided at an opening of the differential shaft cover part in a form in which one side opening of the differential shaft cover part is covered, such that a space in which a multi-disk brake unit can be provided is formed between the brake unit cover part and the rear differential part case.

Description

농용 작업차의 뒷차축 케이스 및 이를 포함하는 농용 작업차의 뒷차축 조합Rear axle case of agricultural work vehicle and rear axle combination of agricultural work vehicle including the same
본 발명은 농용 작업차의 뒷차축 케이스 및 농용 작업차의 뒷차축 조합에 관한 것으로, 상세하게는 최종 변속된 주행동력을 바퀴에 전달하는 뒷차축이 수용되는 농용 작업차의 뒷차축 케이스 및 이를 포함하는 농용 작업차의 뒷차축 조합에 관한 것이다. The present invention relates to a rear axle case of an agricultural work vehicle and a rear axle combination of an agricultural work vehicle, and more particularly, to a rear axle case of an agricultural work vehicle in which a rear axle for transmitting a final shifted driving power to a wheel is accommodated. It is about rear axle combination of agricultural work vehicle to do.
'트랙터(Tractor)' 라 불리우는 농용 작업차는 구조적으로 일반 자동차와 비슷하지만 강력한 엔진을 장착하고 있어 견인력이 좋고 튼튼하여 경작용(耕作用)으로 주로 이용되며, 경작의 용도로 활용을 위해 기체 후방으로 다양한 형태의 작업기를 선택적으로 부착하거나 떼어낼 수 있도록 구성되어 있다. The agricultural work truck called 'Tractor' is similar in structure to the general cars, but it is equipped with a powerful engine, so it is mainly used for cultivation because it has good traction and is strong. It is configured to selectively attach or detach various types of work machines.
이와 같은 농용 작업차의 작업 능률의 우수성을 확보하기 위해서는, 작업 대상부의 토질에 맞춰 주행 속도 및 동력인출축(PTO 축, Power Take Off)의 회전속도를 최적으로 조절할 수 있도록 변속구간 폭이 넓어야 하며, 이를 위해 폭넓은 변속단수를 갖는 복잡한 형태의 변속장치(transmission)를 채택하고 있다.In order to secure the excellence of the work efficiency of such a farming work vehicle, the shift section should be wide in order to optimally adjust the traveling speed and the rotational speed of the power take-off shaft (PTO shaft) according to the soil quality of the work target. To this end, a complex transmission with a wide range of speeds is employed.
도 1은 종래 농용 작업차에 적용되고 있는 미션조합(변속조합)을 나타낸 구조도이다.1 is a structural diagram showing a mission combination (shift combination) applied to a conventional agricultural work vehicle.
도 1을 참조하면, 종래의 미션조합은 크게, 미션부(1)와 뒷차동부(9, 뒷차축 조합)로 구분된다. 미션부(1)는 다시, 전, 후진 변속을 위한 셔틀변속부(2), 폭넓은 변속단수 구현을 위한 주변속부(3)와 부변속부(4), 배속턴 기능과 전륜 구동을 위한 전륜구동부(5)로 구분되고, 뒷차동부(6)는 미션부(1)가 최종 변속시킨 동력을 좌, 우측 후륜에 적절히 배분한다. Referring to FIG. 1, a conventional mission combination is largely divided into a mission unit 1 and a rear wheel drive unit 9 (rear axle combination). The mission unit 1 is, again, a shuttle transmission unit 2 for forward and reverse shifts, a peripheral speed unit 3 and a sub transmission unit 4 for realizing a wide range of shift stages, a front turn wheel function and a front wheel for driving the front wheels. It is divided into the drive part 5, and the rear drive part 6 distributes the power which the mission part 1 finally shifted to the left and right rear wheels suitably.
미션부(1)를 구성하는 셔틀변속부(2)는 운전자 레버조작으로 흐름이 허용되는 압유에 의해 선택적 동력접속이 구현되는 유압식 다판 클러치 방식으로 구성된다. 그리고 주변속부(3)는 싱크로나이저 타입의 다단(4단) 기어로 구성되며, 부변속부(4)는 기어비가 서로 다른 여러 쌍의 기어가 레버조작에 연동해 전후로 움직이면서 선택적으로 물릴 수 있게 되어 있다.The shuttle transmission portion 2 constituting the mission portion 1 is configured in a hydraulic multi-plate clutch system in which a selective power connection is realized by the hydraulic oil which is allowed to flow by the driver lever operation. In addition, the peripheral speed portion 3 is composed of a multi-stage (four-stage) gear of the synchronizer type, and the sub-speed transmission portion 4 can be selectively bitten by moving a pair of gears having different gear ratios in conjunction with the lever operation. have.
전륜구동부(5)는 상기 셔틀변속부(2)와 마찬가지로 유압식 다판 클러치 방식으로 구성되며, 미션부(1)와 뒷차동부(6)를 구성하는 다양한 부품들이 밀폐된 공간을 제공하는 미션 케이스(8)에 의해 보호된다. 그리고 미션 케이스(8)에는 액상의 윤활제가 채워져 원활한 변속 및 동력전달이 행해질 수 있으며 부품 간 마찰과 마모가 방지된다. The front wheel drive unit 5 is configured as a hydraulic multi-plate clutch, similar to the shuttle transmission unit 2, and a mission case 8 which provides a space in which the various parts constituting the mission unit 1 and the rear drive unit 6 are sealed. Protected by). In addition, the mission case 8 may be filled with a liquid lubricant so that smooth transmission and power transmission may be performed, and friction and wear between parts may be prevented.
도면부호 7은 엔진에서 출력된 동력을 작업기 구동을 위한 동력으로 활용하기 위해 기체 밖으로 엔진 동력을 인출시키는 PTO 구동부를 가리키며, 35는 변속을 위한 기어들이 일체 회전 내지는 회전 자유롭게 배치된 카운터 축을 가리킨다. Reference numeral 7 denotes a PTO drive unit which draws engine power out of the gas in order to use the power output from the engine as power for driving the work machine, and 35 denotes a counter shaft in which gears for shifting are freely rotated or rotated freely.
도 2는 종래 미션조합에 적용되는 상기 뒷차동부(뒷차축 조합)를 나타낸 도면이다.Figure 2 is a view showing the rear differential (rear axle combination) applied to the conventional mission combination.
도 2와 같이, 뒷차동부(9)는 크게, 운전상황에 따라 변속된 주행동력을 좌, 우측 후륜에 적절히 분배하는 차동장치(91)가 내설된 뒷차동부 케이스(90)와, 뒷차동부 케이스(90) 좌, 우 양 측면으로 조립되어 차동장치 양 측부로 이격 배치되는 브레이크 유닛(92)을 보호하는 브레이크 케이스(93), 그리고 뒷차축(95)이 내설되는 뒷차축 케이스(96)로 구성된다. As shown in FIG. 2, the rear wheel part 9 includes a rear wheel part case 90 and a rear wheel part case in which a differential device 91 for distributing the driving power shifted according to the driving situation is appropriately distributed to the left and right rear wheels. 90) is composed of a brake case 93 to protect the brake unit 92, which is assembled to both left and right sides and spaced apart from both sides of the differential, and a rear axle case 96 in which the rear axle 95 is installed. .
차동장치(91)를 구성하는 링기어(베벨 종동 기어, 910)가 주변속과 부변속 과정을 거치면서 최종 변속된 동력을 출력하는 베벨 피니언(베벨 구동 기어, 미도시)으로부터 동력을 전달받아 차동장치(91) 및 이에 연결된 차동축(94)이 회전되고, 차동축(94)에 연결된 뒷차축(95)이 회전됨으로써 최종 변속된 회전수로 좌, 우측 후륜이 회전하게 되는 것이다.The ring gear (bevel driven gear 910) constituting the differential device 91 receives power from a bevel pinion (bevel drive gear, not shown) that outputs the final shifted power through a peripheral speed and a sub-shift process. The device 91 and the differential shaft 94 connected thereto are rotated, and the rear axle 95 connected to the differential shaft 94 is rotated so that the left and right rear wheels rotate at the final speed.
그러나 종래의 농용 작업차에 적용되는 상기 뒷차동부(뒷차축 조합)를 구성하는 케이스는, 뒷차동부 케이스(90)와 브레이크 케이스(93), 그리고 브레이크 케이스(93)에 결합되는 뒷차축 케이스(96) 등 크게 세 개의 케이스 구성품으로 이루어짐으로써, 구성이 복잡하고 부품수가 많아 원가절감 측면에서 불리하고 조립 시 곤란함이 수반되는 문제가 있다. However, the case constituting the rear differential unit (rear axle combination) applied to a conventional agricultural work vehicle is a rear axle case 96 coupled to the rear differential unit case 90, the brake case 93, and the brake case 93. By largely consisting of three case components, the configuration is complicated and the number of parts is disadvantageous in terms of cost reduction, and there is a problem that is difficult to assemble.
본 발명이 해결하고자 하는 과제는, 구성품의 일체화를 통해 부품수 감소와 원가 절감, 그리고 장치 조립성의 개선을 도모하고자 하는 것이다.The problem to be solved by the present invention is to reduce the number of parts, reduce the cost, and improve device assembly through the integration of components.
본 발명이 해결하고자 하는 다른 과제는, 제한된 공간 내에 효율적인 부품 배치를 통해 장치의 콤팩트화를 실현하고자 하는 것이다.Another problem to be solved by the present invention is to realize the compactness of the device through efficient component placement in a limited space.
본 발명이 해결하고자 하는 또 다른 과제는, 별도의 공간 확보 없이도 운전자 보호를 위한 보호구조물(ROPS, Roll Over Protective Structure)을 추가 설치할 수 있는 구조의 농용 작업차의 뒷차축 조합을 제공하고자 하는 것이다.Another problem to be solved by the present invention is to provide a rear axle combination of a farming work vehicle structure that can additionally install a Roll Over Protective Structure (ROPS) for driver protection without securing a separate space.
과제의 해결 수단으로서 본 발명의 일 측면에 따르면, 농용 작업차의 뒷차축 케이스에 있어서, 뒷차축을 둘러싸는 중공관 형태의 뒷차축 덮개부; 상기 뒷차축 덮개부 측부에 일체형으로 마련되는 감속기어 덮개부; 상기 감속기어 덮개부 전단에 일체형으로 형성되어 뒷차동부 케이스 바깥으로 연장된 차동축을 덮는 차동축 덮개부; 및 차동축 덮개부의 일측 개구를 커버링 하는 형태로 상기 차동축 덮개부의 개구 측에 일체로 제공되어 뒷차동부 케이스와의 사이에 다판식 브레이크 유닛이 설치될 수 있는 공간을 형성시키는 브레이크 유닛 덮개부;를 포함하는 농용 작업차의 뒷차축 케이스를 제공한다.According to an aspect of the present invention as a means for solving the problem, in the rear axle case of the agricultural work vehicle, the rear axle cover portion of the hollow tube form surrounding the rear axle; A reduction gear cover part provided integrally with the rear axle cover part side; A differential shaft cover part integrally formed at the front end of the reduction gear cover part to cover the differential shaft extending out of the rear differential part case; And a brake unit cover part integrally provided at an opening side of the differential shaft cover part in a form of covering one side opening of the differential shaft cover part to form a space in which a multi-plate brake unit can be installed between the rear differential part case and the cover unit. It provides a rear axle case of the agricultural work vehicle including.
본 발명의 일 측면에서 상기 감속기어 덮개부에는, 상기 차동축 측과 동력 전달 가능하게 접속되는 감속기어 배치를 위한 감속기어 수용공간이 제공되고, 상기 뒷차축 덮개부 반대편의 뒷차동부 케이스와 접하는 측이 개구된 구성일 수 있다.In one aspect of the present invention, the reduction gear cover portion is provided with a reduction gear accommodating space for arranging the reduction gear connected to the differential shaft side so as to be capable of power transmission, and the side of the rear axle cover portion opposite to the rear differential case case. This can be an open configuration.
그리고 상기 차동축 덮개부는, 상기 감속기어 덮개부의 내부공간과 통하며 뒷차동부 케이스 바깥으로 연장된 상기 차동축을 수용하는 차동축 수용공간과; 상기 차동축을 회전 가능하게 지지하는 베어링부재가 정착되는 베어링 정착부;로 포함하는 구성일 수 있다.And the differential shaft cover portion, the differential shaft receiving space for communicating with the inner space of the reduction gear cover portion for receiving the differential shaft extending out of the rear differential unit case; And a bearing fixing part in which a bearing member for rotatably supporting the differential shaft is fixed.
또한, 상기 브레이크 유닛 덮개부의 중앙을 상기 차동축이 관통하며, 차동축이 관통하는 중앙 관통홀 주면에는 베어링 정착면이 제공될 수 있다. In addition, a bearing fixing surface may be provided on a main surface of the center through hole through which the differential shaft penetrates the center of the cover of the brake unit and the differential shaft penetrates.
본 발명의 일 측면에 따른 뒷차축 케이스는, 상기 차동축 덮개부의 둘레에 일체로 형성되는 브레이크 작동레버 장착부;를 더 포함할 수 있다. The rear axle case according to an aspect of the present invention may further include a brake operation lever mounting portion integrally formed around the differential shaft cover portion.
바람직하게는, 상기 감속기어 덮개부의 중심과 차동축 덮개부의 중심, 그리고 뒷차축 덮개부 중심의 높이가 동일한 구성일 수 있다.Preferably, the center of the reduction gear cover portion, the center of the differential shaft cover portion, and the height of the center of the rear axle cover portion may be the same configuration.
또한, 상기 차동축 덮개부와 뒷차축 덮개부 보다 상기 감속기어 덮개부의 직경이 크게 형성될 수 있으며, 상기 뒷차축 덮개부의 중심과 감속기어 덮개부의 중심이 일치하도록 구성함이 바람직하다.In addition, the diameter of the reduction gear cover portion may be larger than the differential shaft cover portion and the rear axle cover portion, it is preferable to configure the center of the rear axle cover portion and the center of the reduction gear cover portion.
또한, 상기 뒷차축 덮개부와 감속기어 덮개부 외연 후부에 일체로 형성되는 운전자 보호구조물(ROPS; Roll Over Protective Structure) 장착을 위한 ROPS 장착대;를 더 포함할 수 있다.In addition, the rear axle cover portion and the reduction gear cover portion ROPS mounting unit for mounting the ROPS (Roll Over Protective Structure) formed integrally on the outer edge; may further include a.
또한, 상기 ROPS 장착대 하부의 상기 뒷차축 덮개부 또는 감속기어 덮개부 외연에 일체로 형성되는 로워링크 부착대; 및 상기 로워링크 부착대 인접 측부에 형성되는 체크링크 부착면;을 더 포함할 수 있다.In addition, a lower link mounting unit integrally formed on the outer axle of the rear axle cover portion or the reduction gear cover portion below the ROPS mount; And a check link attaching surface formed on an adjacent side of the lower link attaching stand.
또한, 상기 감속기어 덮개부 상부 외연에 일체로 형성되며 시트 프레임 지지대 설치를 위한 취부면을 제공하는 시트 프레임 지지대 장착구;를 더 포함할 수 있다. The apparatus may further include a seat frame support mount formed integrally with the upper edge of the reduction gear cover and providing a mounting surface for installing the seat frame support.
과제의 해결 수단으로서 본 발명의 다른 측면에 따르면, 상기한 일 측면에 따른 뒷차축 케이스가 좌우 한 쌍으로 구비되고, 상기 뒷차축 케이스들 사이에 배치되는 뒷차동부 케이스와, 상기 뒷차동부 케이스에서 뒷차축 케이스에 걸쳐 서로 동력 전달 가능하게 배치되는 전동부재들 및 뒷차축 케이스와 뒷차동부 케이스 사이에 장치되어 차량 정지를 위한 제동력을 발생시키는 브레이크 유닛을 포함하는 농용 작업차의 뒷차축 조합을 제공한다.According to another aspect of the present invention as a means for solving the problem, the rear axle case according to the one side is provided in a pair of left and right, rear rear case case disposed between the rear axle case and the rear vehicle in the rear vehicle case A rear axle combination of an agricultural work vehicle including a transmission unit disposed to be capable of transmitting power to each other over a shaft case and a brake unit disposed between the rear axle case and the rear wheel case to generate a braking force for stopping the vehicle.
여기서, 상기 뒷차축 케이스의 외연 후부에 일체로 형성되는 ROPS 장착대에 지지되는 운전자 보호구조물(ROPS)을 더 포함할 수 있다.Here, the driver protection structure (ROPS) that is supported on the ROPS mount is formed integrally with the outer edge of the rear axle case may further include.
상기 ROPS 장착대 하부의 뒷차축 덮개부 또는 감속기어 덮개부에 형성된 로워링크 부착대에 설치되는 후방 작업기 연결을 위한 로워링크; 및 상기 로워링크 부착대 인접 측부의 체크링크 부착면에 설치되고 상기 로워링크와 연결되는 로워링크 간격조절용 체크링크;를 더 포함할 수 있다.A lower link for connecting a rear work machine installed in a lower link mounting portion formed on a rear axle cover portion or a reduction gear cover portion below the ROPS mount; And a check link for adjusting a lower link spacing, which is installed on the check link attaching surface of an adjacent side of the lower link mounting table and connected to the lower link.
또한, 상기 뒷차축 케이스의 감속기어 덮개부 상부 외연에 일체로 형성된 시트 프레임 지지대 장착구에 설치되는 시트 프레임 지지대;를 더 포함할 수 있다.The apparatus may further include a seat frame support installed at a seat frame support mounting hole integrally formed at an upper outer edge of the rear reduction gear cover of the rear axle case.
그리고 상기 전동부재들은, 양쪽 바퀴에 구동력을 배분하는 뒷차동부 케이스 내에 배치된 차동장치와, 일부가 뒷차동부 케이스 바깥으로 연장되도록 상기 차동장치로부터 좌우로 연장되는 차동축과, 뒷차축 케이스의 감속기어 덮개부에 수용되며 뒷차동부 케이스 바깥으로 연장된 상기 차동축에 동력 전달 가능하게 접속되는 감속기어와, 상기 감속기어가 결합되고 뒷차축 케이스의 뒤차축 덮개부 내에 일부가 회전 자유롭게 배치되는 뒷차축;으로 구성될 수 있다.The transmission members may include a differential device disposed in a rear differential case for distributing driving force to both wheels, a differential shaft extending left and right from the differential to partially extend the rear differential case, and a reduction gear of the rear axle case. A reduction gear which is accommodated in the cover part and is connected to the differential shaft extending out of the rear driving part case so as to transmit power, and the rear axle which is coupled to the reduction gear and is rotatably disposed in the rear axle cover part of the rear axle case; Can be configured.
더하여, 상기 차동장치의 편향된 동력전달을 제한하는 차동 고정장치를 더 포함할 수 있다.In addition, it may further comprise a differential lock to limit the deflected power transfer of the differential.
그리고 상기 브레이크 유닛은, 회전 측 디스크와 고정 측 플레이트가 소정의 간격을 두고 순차 배열된 건식 다판 브레이크 타입이며, 일면에 함몰 깊이가 점진적으로 증대되는 볼홈이 원주방향으로 다수 형성된 회전판과, 회전판의 볼홈과 상기 볼홈과 대응되는 뒷차동부 케이스 측의 볼홈 사이에 개재되는 강구를 포함하는 구성일 수 있다.The brake unit is a dry multi-plate brake type in which a rotating disk and a fixed side plate are sequentially arranged at predetermined intervals, and a rotating plate having a plurality of ball grooves in a circumferential direction in which dent depth gradually increases on one surface thereof, and a ball groove of a rotating plate. And it may be a configuration including a steel ball interposed between the ball groove on the rear side of the case portion corresponding to the ball groove.
또한, 상기 회전판의 둘레 일부에 제동력 발생을 위한 회전력이 입력되는 입력단이 일체로 구비되고, 상기 입력단과 캠 접촉하는 캠면을 구비한 작동캠을 더 포함할 수 있다.In addition, an input end through which a rotational force for generating braking force is input may be integrally provided at a part of the circumference of the rotating plate, and may further include an operation cam having a cam surface in contact with the input end.
이때, 상기 작동캠에 접촉하는 입력단의 접촉면은 평면이며, 작동캠은 상기 입력단의 접촉면과 접하는 평면부와 평면부 배면의 원호형상의 곡면부로 이루어진 구성일 수 있다.In this case, the contact surface of the input end in contact with the actuating cam is a flat surface, the actuating cam may be composed of a flat portion in contact with the contact surface of the input end and an arc-shaped curved portion of the back surface of the flat portion.
[유리한 효과][Favorable effect]
본 발명의 실시 예에 따르면, 뒷차축을 감싸는 뒷차축 케이스와 브레이크 유닛을 보호하는 브레이크 케이스가 하나의 케이스로 일체화된 형태로 제공됨으로써, 두 구성품이 분리된 종래의 구조와 비교해 부품수 감소를 통한 구성의 단순화 및 원가 절감을 통한 가격 경쟁력 확보를 달성할 수 있으며, 조립의 용이성을 증대시킬 수 있다.According to an embodiment of the present invention, the rear axle case surrounding the rear axle and the brake case for protecting the brake unit are provided in an integrated form into a single case, so that the components can be reduced in comparison with the conventional structure in which the two components are separated. It can achieve price competitiveness by simplifying the cost and reducing the cost, and can increase the ease of assembly.
또한, 하나로 통합된 일체화된 구조이면서도 뒷차축 조합을 이루는 구성요소들의 효율적인 배치를 도모할 수 있는 공간부를 확보한 구조로서, 뒷차축 조합을 보다 콤팩트하게 구현할 수 있고, 뒷차축 케이스의 외연에 ROPS 장착대가 일체로 제공됨으로써, 별도 장착공간의 확보 없이도 운전자 보호를 위한 구조물(ROPS)을 추가 부착할 수 있다.In addition, it is an integrated structure that is integrated into one and secured a space that can efficiently arrange the components forming the rear axle combination, it is possible to implement the rear axle combination more compact, ROPS mounted on the outer edge of the rear axle case As the stand is provided integrally, the ROPS can be additionally attached without securing a separate mounting space.
도 1은 종래 농용 작업차의 미션조합(변속조합)의 구조도.1 is a structural diagram of a mission combination (shift combination) of a conventional agricultural work vehicle.
도 2는 도 1의 종래 미션조합에 적용되는 뒷차동부의 단면도.Figure 2 is a cross-sectional view of the rear vehicle is applied to the conventional mission combination of FIG.
도 3은 본 발명과 관련한 농용 작업차의 측면도.Figure 3 is a side view of a farming vehicle in accordance with the present invention.
도 4는 본 발명과 관련한 농용 작업차의 평면도.4 is a plan view of a farm work vehicle according to the present invention.
도 5는 도 4의 농용 작업차에 적용되는 본 발명의 일 측면에 따른 뒷차축 케이스의 사시도.5 is a perspective view of a rear axle case according to an aspect of the present invention applied to the agricultural work vehicle of FIG.
도 6은 도 5에 도시된 뒷차축 케이스를 다른 각도에서 바라본 사시도.Figure 6 is a perspective view of the rear axle case shown in Figure 5 from another angle.
도 7은 도 5에 도시된 뒷차축 케이스의 좌측면도.Figure 7 is a left side view of the rear axle case shown in Figure 5;
도 8은 도 5에 도시된 뒷차축 케이스의 우측면도.8 is a right side view of the rear axle case shown in FIG.
도 9는 도 5에 도시된 뒷차축 케이스의 평 단면도.9 is a cross-sectional view of the rear axle case shown in FIG.
도 10은 도 5에 도시된 뒷차축 케이스를 포함하는 농용 작업차의 뒷차축 조합의 사시도.10 is a perspective view of the rear axle combination of the agricultural work vehicle including the rear axle case shown in FIG.
도 11은 도 5에 도시된 뒷차축 케이스를 포함하는 농용 작업차의 뒷차축 조합을 차폭 방향으로 절단하여 도시한 횡 단면도.FIG. 11 is a side cross-sectional view of the rear axle combination of the agricultural work vehicle including the rear axle case illustrated in FIG. 5, cut in the vehicle width direction.
도 12는 도 11에서 브레이크 유닛이 설치된 'A'부를 확대 도시한 도면.FIG. 12 is an enlarged view of an 'A' part in which a brake unit is installed in FIG. 11;
도 13은 브레이크 유닛의 회전판과 작동캠이 캠 접촉된 부분을 확대 도시한 사시도.FIG. 13 is an enlarged perspective view of a portion where the rotating plate of the brake unit and the operating cam are in cam contact with each other; FIG.
도 14는 운전자 보호구조물 ROPS 장착대가 설치된 부분을 확대 도시한 도면.14 is an enlarged view showing a part where the driver protection structure ROPS mount is installed;
도 15 도 14에 나타난 ROPS 장착대에 운전자 보호구조물(ROPS)이 장착된 모습을 배면에서 바라본 도면. FIG. 15 is a rear view of the driver protection structure (ROPS) mounted on the ROPS mount shown in FIG. 14; FIG.
도 16은 농용 작업차의 뒷차축 조합을 구성하는 뒷차축 케이스에 후방 작업기 연결을 위한 로워링크와 체크링크, 그리고 운전석 시트 프레임 지지대가 설치된 모습을 나타낸 사시도.FIG. 16 is a perspective view illustrating a lower link and a check link and a driver's seat frame support for connecting a rear work machine to a rear axle case constituting a rear axle combination of a farm work vehicle; FIG.
이하, 첨부도면을 참조하여 본 발명의 바람직한 실시예를 상세히 설명하기로 한다. 본 발명을 설명함에 있어 발명의 요지를 불필요하게 흐릴 소지가 있는 구성에 대해서는 그 상세한 설명은 생략하기로 한다. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, a detailed description thereof will be omitted for configurations that may unnecessarily obscure the subject matter of the present invention.
도 3은 본 발명과 관련한 농용 작업차의 측면도이며, 도 4는 도 3에 도시된 농용 작업차를 평면에서 바라본 도면이다. 이들 도면을 참조하여 본 발명과 관련한 농용 작업차의 전체적인 구성에 대해 먼저 개략적으로 살펴보기로 한다.Figure 3 is a side view of the agricultural work vehicle according to the present invention, Figure 4 is a plan view of the agricultural work vehicle shown in FIG. The overall configuration of the agricultural work vehicle related to the present invention will be first outlined with reference to these drawings.
도 3 내지 도 4를 참조하면, 본 발명과 관련한 농용 작업차는, 주행 기체 전방에 보닛으로 덮인 엔진 룸(30)을 구비한다. 엔진 룸(30)에는 엔진(50)을 비롯해 차량 구동과 관련된 주요부품이 탑재되며, 엔진 룸(30)의 후방에는 전륜 조향을 위한 조향 핸들(부호 생략)을 비롯해, 기체 조작을 위한 각종 레버, 버튼, 스위치 등이 장치된 운전석(10)이 배치된다.3 to 4, the agricultural work vehicle according to the present invention includes an engine room 30 covered with a bonnet in front of the traveling body. The engine room 30 includes the engine 50 and other main parts related to driving the vehicle. The engine room 30 includes a steering wheel for omnidirectional steering (not shown) at the rear of the engine room 30, various levers for operating the aircraft, A driver's seat 10 equipped with buttons, switches, and the like is disposed.
운전석(10) 후방의 주행 기체 후미에는 다양한 작업기의 견인식 연결을 위한 3점식 승강 장치(70)가 마련된다. 그리고 엔진 룸(30), 운전석(10), 승강 장치(70)를 갖춘 주행 기체는, 엔진 룸 저부의 좌우 양측으로 배치되는 한 쌍의 조향 전륜(FW)과 승강 장치 좌우 양측으로 배치되는 한 쌍의 구동 후륜(RW)으로 구성된 주행륜에 의해 기동 가능하게 지지된다. At the rear of the driver's seat 10, a three-point elevating device 70 is provided for towing connection of various work machines. And the traveling body provided with the engine room 30, the driver's seat 10, and the lifting device 70 is a pair of steering front wheels FW arrange | positioned to the left and right both sides of the engine room bottom, and a pair arrange | positioned to both sides of the lifting device left and right. It is supported so that it can be started by the driving wheel which consists of the driving rear wheel RW of.
기체 전방의 엔진 프레임(2) 저부에는 상기 전륜(FW)이 연결되고 이 전륜(FW)에 동력 전달을 위한 좌우 한 쌍의 차동축이 내설된 앞차축 하우징(40)이 차체 좌우 폭방향으로 배치된다. 또한 기체 후방에 배치된 후륜(RW)은 기체 후부 측 뒷차동부 케이스(60) 좌우 양측의 뒷차축 케이스(65)에 둘러싸인 뒷차축(65)의 노출부 선단에 결합된다. The front wheel (FW) is connected to the bottom of the engine frame (2) in front of the body, and the front axle housing (40) in which the front wheel (FW) has a pair of left and right differential shafts for power transmission is disposed in the left and right width directions. do. In addition, the rear wheels (RW) disposed at the rear of the body is coupled to the tip of the exposed portion of the rear axle 65 surrounded by the rear axle case (65) on both sides of the rear of the rear rear case part (60).
운전석 저부에 차체 길이 방향으로 배치되는 미션 케이스(8)를 통해 상기 엔진 프레임(20)과 뒷차동부 케이스(60)가 상호 연결됨으로써 견고한 차대(chassis)를 구성하게 되며, 상기 뒷차동부 케이스(60) 내에는 미션 케이스(8) 내에 배치된 변속장치를 거쳐 최종 변속된 동력을 좌, 우측 후륜에 배분하는 차동장치(후술 됨)가 설치된다.The engine frame 20 and the rear driving unit case 60 are connected to each other through a mission case 8 disposed at the bottom of the driver's seat in the longitudinal direction of the vehicle to form a rigid chassis, and the rear driving unit case 60 is formed. Inside, a differential device (described later) for distributing the final shifted power to the left and right rear wheels is provided via a transmission device arranged in the mission case 8.
뒷차동부 케이스 좌우 양측으로 배치되는 본 발명의 일 실시 예와 관련한 상기 뒷차축 케이스의 구성에 대해서는 이하 도 5 내지 도 9를 참조하기로 한다.The configuration of the rear axle case in accordance with an embodiment of the present invention disposed on both sides of the rear wheel part case will be described with reference to FIGS. 5 to 9.
도 5 내지 도 9를 참조하면, 본 발명의 일 실시 예에 따른 뒷차축 케이스(66)는, 뒷차축(65)을 둘러싸는 중공관 형태의 뒷차축 덮개부(660)와, 상기 뒷차축 덮개부(660) 측부에 일체형으로 마련되는 감속기어 덮개부(662)를 포함한다. 그리고 상기 감속기어 덮개부(662) 일측에는 차동축 덮개부(664)가 일체형으로 형성되어 뒷차동부 케이스(60) 바깥으로 연장되는 차동축(62, 도 11 참조)을 덮는다.5 to 9, the rear axle case 66 according to an embodiment of the present invention includes a rear axle cover portion 660 having a hollow tube shape surrounding the rear axle 65 and the rear axle cover. It includes a reduction gear cover portion 662 integrally provided on the side portion 660. A differential shaft cover portion 664 is integrally formed on one side of the reduction gear cover portion 662 to cover the differential shaft 62 (see FIG. 11) extending out of the rear differential case 60.
차동축 덮개부(664)의 일측 개구를 커버링 하는 형태로 상기 차동축 덮개부(664)의 개구 측에 브레이크 유닛 덮개부(666)가 일체로 제공되며, 브레이크 유닛 덮개부(666)에 의해 장치 조립 시 상기 뒷차동부 케이스(60)와 상기 브레이크 유닛 덮개부(666) 사이로 다판식 브레이크 유닛(68)이 설치될 수 있는 공간이 형성된다.The brake unit cover part 666 is integrally provided on the opening side of the differential shaft cover part 664 in a form covering the opening of one side of the differential shaft cover part 664, and is provided by the brake unit cover part 666. When assembling, a space in which the multi-plate brake unit 68 may be installed is formed between the rear differential case 60 and the brake unit cover 666.
감속기어 덮개부(662)에는 상기 차동축(62) 측과 동력 전달 가능하게 접속되는 감속기어(63, 도 11 참조)가 배치되는 감속기어(63) 수용공간(S1)이 제공된다. 감속기어 덮개부(662)는 상기 뒷차축 덮개부(660) 반대편의 뒷차동부 케이스(60)와 접하는 측이 개구되어 있으며, 개구된 부분을 통해 상기 감속기어(63)가 진입해 상기 수용공간(S1) 내에 위치하게 된다. The reduction gear cover part 662 is provided with a reduction gear 63 accommodating space S1 in which a reduction gear 63 (see FIG. 11) is connected to the differential shaft 62 so as to transmit power. The reduction gear cover part 662 has an opening in a side contacting the rear drive part case 60 opposite to the rear axle cover part 660, and the reduction gear 63 enters through the opening to receive the accommodation space ( It is located in S1).
차동축 덮개부(664)에 의해 상기 감속기어 덮개부(662)의 내부공간 즉, 상기 감속기어 수용공간(S1)과 통하며 뒷차동부 케이스(60) 바깥으로 연장된 상기 차동축(62)을 수용하는 차동축(62) 수용공간(S2)이 형성되며, 차동축(62) 수용공간에 배치되는 상기 차동축(62)의 단부가 회전 가능하게 지지될 수 있도록 베어링부재가 정착되는 베어링 정착부(665)가 제공된다.The differential shaft cover 664 communicates with the inner space of the reduction gear cover portion 662, that is, the reduction gear accommodation space S1 and extends out of the rear differential case 60. A bearing fixing part in which a differential shaft 62 accommodating space S2 is formed and a bearing member is fixed so that an end of the differential shaft 62 disposed in the differential shaft 62 accommodating space is rotatably supported. 665 is provided.
감속기어 덮개부(662)의 중심(C1)과 차동축 덮개부(664)의 중심(C2), 그리고 뒷차축 덮개부(660) 중심(C3)의 높이는 동일하며, 상기 차동축 덮개부(664)와 뒷차축 덮개부(660)의 직경에 비해 상기 감속기어 덮개부(662)의 직경이 크게 형성된다. 그리고 상기 뒷차축 덮개부(660)의 중심(C3)과 상기 감속기어 덮개부(662)의 중심(C1)은 일치한다.The height of the center C1 of the reduction gear cover 662, the center C2 of the differential shaft cover 664, and the center C3 of the rear axle cover 660 are the same, and the differential shaft cover 664 is the same. And a diameter of the reduction gear cover 662 is larger than that of the rear axle cover 660. The center C3 of the rear axle cover 660 and the center C1 of the reduction gear cover 662 coincide with each other.
브레이크 유닛 덮개부(666)의 중앙에는 관통홀(667)이 형성되어 뒷차동부 케이스(60) 측부로 연장 노출된 상기 차동축(62)이 관통하게 되며, 차동축(62)이 관통하는 상기 중앙 관통홀(667) 주면에는 베어링 정착면(668)이 형성되고, 여기에 상기 차동축(62)의 일부를 회전 가능하게 지지하는 베어링부재가 압입 방식으로 끼워져 고정된다. A through hole 667 is formed in the center of the brake unit cover part 666 so that the differential shaft 62 extending to the rear differential case 60 is penetrated, and the center through which the differential shaft 62 penetrates. A bearing fixing surface 668 is formed on a main surface of the through hole 667, and a bearing member for rotatably supporting a part of the differential shaft 62 is fitted and fixed in a press-fit manner.
본 발명의 일 측면에 따른 상기 뒷차축 케이스(66)는, 상기 차동축 덮개부(664)의 둘레에 일체로 형성되는 브레이크 작동레버 장착부(669)를 더 포함할 수 있다. 그리고 뒷차축 덮개부(660) 또는 감속기어 덮개부(662) 외연 후부에 운전자 보호구조물(ROPS; Roll Over Orotective Structure) 장착을 위한 ROPS 장착대(661)를 일체로 더 구비할 수 있다.The rear axle case 66 according to an aspect of the present invention may further include a brake operating lever mounting portion 669 integrally formed around the differential shaft cover portion 664. In addition, the rear axle cover part 660 or the reduction gear cover part 662 may further include an ROPS mounting unit 661 for mounting a driver protection structure (ROPS; Roll Over Orotective Structure).
본 발명의 일 측면에 따른 상기 뒷차축 케이스(66)는 또한, ROPS 장착대(661) 하부의 상기 뒷차축 덮개부(660) 또는 감속기어 덮개부(662) 외연에 로워링크 부착대(670)를 일체로 더 구비할 수 있으며, 로워링크 부착대(670) 인접 측부에 체크링크 부착면(672)이 더 형성될 수 있다. 그리고 상기 감속기어 덮개부(662) 상부 외연에 일체로 형성되는 시트 프레임 지지대 장착구(674)를 더 포함할 수 있다. According to an aspect of the present invention, the rear axle case 66 may further include a lower link mounting unit 670 on the outer edge of the rear axle cover portion 660 or the reduction gear cover portion 662 below the ROPS mount 661. It may be further provided integrally, the check link attaching surface 672 may be further formed on the side adjacent to the lower link mounting (670). And it may further include a seat frame support mounting hole 674 integrally formed on the upper outer edge of the reduction gear cover portion 662.
로워링크 부착대(670)에는 레이크(rake), 로터베이터(rotavator)와 같은 후방 작업기와의 연결을 위한 로워링크(72, 도 16 참조)가 설치되며, 체크링크 부착면(672)에는 상기 로워링크(72)의 좌, 우 간격조절을 위한 체크링크(72, 도 16 참조)가 부착될 수 있다. The lower link attachment 670 is provided with a lower link 72 (refer to FIG. 16) for connection with a rear work machine such as a rake and a rotavator, and the lower link is mounted on the check link attachment surface 672. Check links 72 (see FIG. 16) for adjusting the left and right spacing of the link 72 may be attached.
그리고 상기 시트 프레임 지지대 장착구(674)에는 운전석 시트(11, 도 3 참조) 저부의 시트 프레임(미도시)을 지지하는 시트 프레임 지지대가 취부된다(도 16 참조).The seat frame support mounting hole 674 is provided with a seat frame support for supporting a seat frame (not shown) at the bottom of the driver's seat 11 (see FIG. 3) (see FIG. 16).
본 발명의 일 측면에 따른 뒷차축 케이스를 포함하는 뒷차축 조합에 대해 이하 도 10는 도 11을 참조하여 설명하기로 한다.A rear axle combination including a rear axle case according to an aspect of the present invention will be described below with reference to FIG.
도 10은 도 4에 도시된 뒷차축 케이스(66)를 포함하는 농용 작업차의 뒷차축 조합의 사시도이며, 도 11은 도 4에 도시된 뒷차축 케이스를 포함하는 농용 작업차의 뒷차축 조합을 차폭 방향으로 절단하여 도시한 횡 단면도이다.FIG. 10 is a perspective view of the rear axle combination of the agricultural work vehicle including the rear axle case 66 illustrated in FIG. 4, and FIG. 11 is a rear axle combination of the agricultural work vehicle including the rear axle case illustrated in FIG. 4. It is the horizontal cross section figure cut in the vehicle width direction.
도 10 내지 도 11을 참조하면, 뒷차축 조합(6)은, 좌우 대향 배치되는 전술한 뒷차축 케이스(66)와, 뒷차축 케이스(66)들 사이에 배치되는 뒷차동부 케이스(60)와, 뒷차동부 케이스(60)에서 뒷차축 케이스(66)에 걸쳐 동력 전달 가능하게 배치되는 전동부재들과, 뒷차축 케이스(66)와 뒷차동부 케이스(60) 사이에 장치되는 브레이크 유닛(68)을 포함한다. Referring to FIGS. 10 to 11, the rear axle combination 6 includes the rear axle case 66 which is disposed opposite to the left and right, the rear axle case 60 disposed between the rear axle cases 66, Transmission members disposed to be capable of transmitting power from the rear axle case 60 to the rear axle case 66, and a brake unit 68 mounted between the rear axle case 66 and the rear axle case 60. do.
전동부재들은 뒷차동부 케이스(60) 내에 배치되는 차동장치(61)와, 상기 차동장치(61)로부터 좌우로 연장되는 좌우 한 쌍의 차동축(62)을 구비한다. 또한 뒷차축 케이스(66)의 감속기어 덮개부(662)에 수용되며 차동축(62)에 동력 전달 가능하게 연결되는 감속기어(63)와, 감속기어(63)와 결합되고 뒷차축 케이스(66) 내부를 거쳐 케이스 밖으로 연장되는 뒷차축(65)을 포함한다.The transmission members include a differential device 61 disposed in the rear differential case 60 and a pair of left and right differential shafts 62 extending from the differential device 61 to the left and right sides. In addition, the reduction gear 63 is accommodated in the reduction gear cover portion 662 of the rear axle case 66 and coupled to the differential shaft 62 so as to transmit power, and the reduction gear 63 is coupled to the rear axle case 66. The rear axle 65 extends through the inside and out of the case.
차동장치(61)는 양쪽 바퀴(좌, 우측 후륜)에 구동력을 배분하기 위해 기능하며, 차동 케이스(610), 차동 케이스(610) 내에 배치된 차동 피니언(612), 차동 케이스(610)와 일체형으로 회전되고 최종 변속 동력 출력을 위한 출력축에 축착된 베벨 피니언(613)과 기어 물림되는 링기어(614) 및 차동축(62)에 끼워지고 상기 차동 피니언(612)과 맞물리는 좌우 한 쌍의 사이드 기어(616)를 포함한다.The differential device 61 functions to distribute the driving force to both wheels (left and right rear wheels) and is integral with the differential case 610, the differential pinion 612 and the differential case 610 disposed in the differential case 610. Left and right sides of the bevel pinion 613, geared bite ring gear 614 and differential shaft 62, engaged with the differential pinion 612 and rotated to the output shaft for final transmission power output. Gear 616.
이와 같은 차동장치(61)는 이미 공지된 기술이며, 따라서 이에 대한 보다 구체적인 구성 및 작동에 대한 상세한 설명은 생략한다.Such a differential device 61 is a known technique, and thus a detailed description of more specific configuration and operation thereof will be omitted.
차동장치(61)를 통해 배분된 동력은 상기 사이드 기어(616)를 통해 차동장치(61) 좌우 양측으로 연장되는 상기 차동축(62)에 전달된다. 그리고 뒷차축 케이스(66)의 차동축 덮개부(664) 내에서 상기 차동축(62)에 동력 전달 가능하게 접속되는 감속기어(63)로 전달되며, 뒷차축 덮개부(660)를 따라 뒷차축 케이스(66) 바깥으로 연장되는 뒷차축(65)을 거쳐 바퀴(후륜)에 전달된다. Power distributed through the differential device 61 is transmitted to the differential shaft 62 extending to the left and right sides of the differential device 61 through the side gear 616. And it is transmitted to the reduction gear 63 which is connected to the differential shaft 62 so as to transmit power within the differential shaft cover portion 664 of the rear axle case 66, the rear axle along the rear axle cover portion 660 It is transmitted to the wheels (rear wheels) via a rear axle 65 extending out of the case 66.
도면부호 64는 차동장치(61)의 편향된 동력전달을 제한하는 차동 고정장치이다. 차동 고정장치(64)는 한 쪽 바퀴에만 부하가 편중되는 환경의 작업상황에서 상대적으로 부하가 적은 다른 한 쪽 바퀴 측에만 구동력이 미치는 현상을 해소하기 위한 것으로, 차동축(62)과 차동 케이스(610)를 연동 가능하게 접속시켜 두 차동축(62)이 동일 회전수로 회전될 수 있도록 한다. Reference numeral 64 denotes a differential fixing device that limits the deflected power transmission of the differential device 61. Differential fixing device 64 is to solve the phenomenon that the driving force is applied only to the other side of the wheel with a relatively low load in the work situation in which the load is biased only on one wheel, the differential shaft 62 and the differential case ( 610 is interlockably connected so that the two differential shafts 62 can be rotated at the same speed.
차동 고정장치(64)는 바람직하게, 차동 고정 레버(미도시)에 연결되는 차동 포크축(640)과, 차동 포크축(640)에 연동 가능하게 연결된 차동 포크(642)와, 일측(도면에서 좌측) 차동축(62)에 일체 회전 가능하게 배치되어 차동축(62)을 따라 이동하는 차동 시프트(644)로 구성되되, 차동 시프트(644)가 상기 차동 포크의 진퇴 운동에 연동해 차동축(62)을 이동하여 차동축(62)과 차동 케이스(610)를 일체 회전 가능하게 연결시킨다. The differential fixing device 64 preferably includes a differential fork shaft 640 connected to a differential fixing lever (not shown), a differential fork 642 connected to the differential fork shaft 640 so as to be interlocked, and one side (in the drawing). Left) It is composed of a differential shift 644 is disposed rotatably on the differential shaft 62 and moves along the differential shaft 62, the differential shift 644 in conjunction with the retraction movement of the differential fork ( By moving 62, the differential shaft 62 and the differential case 610 are integrally rotatable.
즉 도시되지 않은 차동 고정 레버를 밟아 차동 고정장치(64)가 작동되면, 차동 포크축(640)이 회전하고 차동 포크(642)가 축방향으로 이동되며, 차동 포크(642)의 이동에 연동해 상기 차동 시프트(644)가 차동축(62)과 차동 케이스(610)를 동력 전달 가능하게 직접 접속시키는 방향으로 이동됨으로써, 차동 고정이 이루어지는 것이다. That is, when the differential fixing device 64 is operated by stepping on a differential fixing lever (not shown), the differential fork shaft 640 rotates and the differential fork 642 is moved in the axial direction. The differential shift 644 is moved in a direction in which the differential shaft 62 and the differential case 610 are directly connected to each other so as to transmit power, thereby performing differential fixation.
브레이크 유닛에 대해서는 이하 도 12를 참조하기로 한다.A brake unit will be described below with reference to FIG. 12.
도 12를 참조하면, 브레이크 유닛(68)은 회전 측 디스크(680)와 고정 측 플레이트(682)가 소정의 간격을 두고 차례로 배치된 건식 다판 브레이크 타입으로, 일면에 함몰 깊이가 점진적으로 증대되는 볼홈(H)이 원주방향으로 다수 형성된 회전판(684)과, 회전판(684)의 볼홈(H)과 상기 볼홈(H)과 대응되는 뒷차동부 케이스(60) 측면의 볼홈(부호 생략) 사이에 강구(B)를 개재시킨 구성으로 이루어진다.Referring to FIG. 12, the brake unit 68 is a dry multi-plate brake type in which the rotating side disk 680 and the fixed side plate 682 are sequentially disposed at predetermined intervals, and the ball groove gradually increasing the depth of depression on one surface thereof. Steel balls (not shown) between the rotating plate 684 formed a plurality of (H) in the circumferential direction, the ball groove (H) of the rotating plate 684 and the ball groove (side not shown) of the side of the rear drive unit case 60 corresponding to the ball groove (H) It consists of a structure through B).
회전판(684)의 둘레 일부에는 제동력 발생을 위한 회전력이 입력되는 입력단(685)이 일체로 구비되고, 상기 입력단(685)은 브레이크 작동레버 장착부(669)에 설치되는 작동캠(67)의 캠면과 캠 접촉된다. 이때 도 13과 같이, 작동캠(67)에 접촉하는 입력단(685)의 접촉면은 평면이며, 작동캠(67)은 상기 입력단(685)의 접촉면과 접하는 평면부(670)와 평면부(670) 배면의 원호형상의 곡면부(672)를 포함한다.A part of the circumference of the rotating plate 684 is integrally provided with an input end 685 for inputting a rotational force for generating a braking force, and the input end 685 is provided with a cam surface of the operation cam 67 installed in the brake operation lever mounting portion 669. Cam contact. In this case, as shown in FIG. 13, the contact surface of the input end 685 contacting the actuating cam 67 is a flat surface, and the actuating cam 67 is a flat part 670 and the planar part 670 contacting the contact surface of the input end 685. And an arc-shaped curved portion 672 on the back side.
이와 같은 구성에 의해, 브레이크 레버(미도시)를 당기면, 작동캠(67) 및 이에 캠 접촉된 회전판(684)이 회전하게 되며, 회전판(684)의 회전에 따라 상대적으로 강구(B)가 회전판(684)의 볼홈(H)으로부터 이탈됨으로써 볼홈(H)의 깊이만큼 회전판(684)이 디스크(680) 방향으로 전진 이동하게 되고, 플레이트(682)가 브레이크 디스크(680)를 압박함으로써 제동력이 발생된다. With this configuration, when the brake lever (not shown) is pulled, the operation cam 67 and the rotating plate 684 in contact with the cam rotate, and the steel ball B is relatively rotated according to the rotation of the rotating plate 684. By moving away from the ball groove H of 684, the rotating plate 684 moves forward in the direction of the disk 680 by the depth of the ball groove H, the braking force is generated by the plate 682 to press the brake disk 680 do.
반대로, 당겨진 브레이크 레버(미도시)를 원상태로 복귀시키면, 작동캠(67) 및 이에 캠 접촉된 회전판(684)이 반대로 회전하며, 회전판(684)의 회전에 따라 상대적으로 강구(B)가 회전판(684)의 볼홈(H)에 다시 위치함으로써 볼홈(H)의 깊이만큼 스프링 부재의 복원력에 의해 회전판(684) 및 플레이트(682)가 원위치로 후퇴함으로써 제동 상태가 해제된다. On the contrary, when the pulled brake lever (not shown) is returned to its original state, the working cam 67 and the rotating plate 684 in contact with the cam rotate in reverse, and the steel ball B is relatively rotated according to the rotation of the rotating plate 684. By repositioning to the ball groove H of 684, the braking state is released by the revolving plate 684 and the plate 682 retreating to their original positions by the restoring force of the spring member by the depth of the ball groove H.
한편, 도 14는 운전자 보호구조물 ROPS 장착대가 형성된 부분을 확대 도시한 도면이며, 도 15는 도 14에 나타난 ROPS 장착대에 운전자 보호구조물(ROPS)이 장착된 모습을 배면에서 바라본 도면이다. Meanwhile, FIG. 14 is an enlarged view of a portion in which the driver protection structure ROPS mount is formed, and FIG. 15 is a view of the driver protection structure ROPS mounted on the ROPS mount shown in FIG.
도 14 내지 도 15에 도시된 바와 같이, 뒷차축 케이스(66)의 외연 후부에는 앞서도 간단히 설명한 ROPS 장착대(661)가 일체로 형성된다. 그리고 상기 ROPS 장착대(661)에 차량이 전복되는 사고로부터 운전자를 보호하기 위한 운전자 보호구조물(ROPS; Roll Over Orotective Structure, 69)이 지지되어 운전석 후방에서 운전석보다 높게 연장 설치된다.As illustrated in FIGS. 14 to 15, the ROPS mount 661, which has been briefly described above, is integrally formed at the outer edge rear portion of the rear axle case 66. In addition, a ROPS (Roll Over Orotective Structure) 69 is supported on the ROPS mount 661 to protect the driver from an overturning of the vehicle.
여기서 상기 ROPS 장착대(661)는 상기 운전자 보호구조물(69)의 단면 형상이나 전체적인 구조에 따라 달라질 수 있으므로 도시된 형태로 국한되는 것은 아니며, 운전자 보호구조물(69) 하단에는 상기 ROPS 장착대(661)와의 결합을 위한 장착면을 형성한 장착브래킷(690)이 일체로 제공될 수 있다.The ROPS mount 661 is not limited to the illustrated form because the ROPS mount 661 may vary depending on the cross-sectional shape or the overall structure of the driver protection structure 69, and the ROPS mount 661 is disposed at a lower end of the driver protection structure 69. ) May be provided integrally with the mounting bracket 690 to form a mounting surface for coupling with the).
도 16은 상기한 농용 작업차의 뒷차축 조합을 구성하는 뒷차축 케이스에 후방 작업기 연결을 위한 로워링크와 체크링크, 그리고 운전석 시트 프레임 지지대가 설치된 모습을 나타낸 사시도이다.FIG. 16 is a perspective view illustrating a lower link, a check link, and a driver seat frame frame support for connecting a rear work machine to a rear axle case constituting the rear axle combination of the agricultural work vehicle.
도 16에 도시된 바와 같이, 본 발명의 다른 측면에 따른 뒷차축 조합은, ROPS 장착대(661) 하부의 뒷차축 덮개부 또는 감속기어 덮개부에 형성된 로워링크 부착대(670)에 설치되는 좌, 우 한 쌍의 로워링크(72)를 더 포함할 수 있다. 상기 로워링크(72)는 농용 작업차 후방에 레이크(rake), 로터베이터(rotavator)와 같은 후방 작업기와의 연결을 위한 것으로 작업기 형태에 따라 길이 조절이 가능하게 구성된다. As shown in FIG. 16, the rear axle combination according to another aspect of the present invention includes a left side installed in the lower link mounting portion 670 formed in the rear axle cover portion or the reduction gear cover portion under the ROPS mount 661. It may further include a pair of lower link (72). The lower link 72 is configured to be connected to a rear work device such as a rake and a rotavator at the rear of a farm work vehicle so that the length can be adjusted according to the work machine shape.
로워링크 부착대(670) 인접 측부에 형성된 체크링크 부착면(672)에는 상기 좌, 우 한 쌍의 로워링크(72) 간 좌, 우 간격조절을 위한 체크링크(72)가 부착될 수 있으며, 시트 프레임 지지대 장착구(674)에 취부되며 운전석 시트(11, 도 3 참조) 저부의 시트 프레임(미도시)을 지지하는 시트 프레임 지지대(110)를 더 포함할 수 있다.The check link attachment surface 672 formed at the adjacent side of the lower link mounting stand 670 may be attached with a check link 72 for adjusting the left and right spacing between the left and right pair of lower links 72. The apparatus may further include a seat frame support 110 mounted to the seat frame support mounting hole 674 and supporting a seat frame (not shown) at the bottom of the driver's seat 11 (see FIG. 3).
이상의 본 발명의 실시 예에 따르면, 뒷차축을 감싸는 뒷차축 케이스와 브레이크 유닛을 보호하는 브레이크 케이스가 하나의 케이스로 일체화된 형태로 제공됨으로써, 두 구성품이 분리된 종래의 구조와 비교해 부품수 감소를 통한 구성의 단순화 및 원가 절감을 통한 가격 경쟁력 확보를 달성할 수 있으며, 조립의 용이성을 증대시킬 수 있다.According to the exemplary embodiment of the present invention, the rear axle case surrounding the rear axle and the brake case protecting the brake unit are provided in an integrated form as a single case, thereby reducing the number of parts compared to the conventional structure in which the two components are separated. It can achieve price competitiveness by simplifying the configuration and reducing the cost, and can increase the ease of assembly.
또한, 하나로 통합된 일체화된 구조이면서도 뒷차축 조합을 이루는 구성요소들의 효율적인 배치를 도모할 수 있는 공간부를 확보한 구조로서, 보다 콤팩트한 구성의 뒷차축 조합을 제공할 수 있다는 장점이 있으며, 뒷차축 케이스의 외연에 ROPS 장착대가 일체로 제공됨으로써, 별도 장착공간의 확보 없이도 운전자 보호를 위한 구조물(ROPS)을 추가 부착할 수 있다.In addition, it is an integrated structure that is integrated into one and secured a space part that can efficiently arrange the components forming the rear axle combination, there is an advantage that can provide a more compact rear axle combination, the rear axle Since the ROPS mount is integrally provided on the outer edge of the case, it is possible to additionally attach a structure for protecting the driver (ROPS) without securing a separate mounting space.
이상의 본 발명의 상세한 설명에서는 그에 따른 특별한 실시 예에 대해서만 기술하였다. 하지만 본 발명은 상세한 설명에서 언급되는 특별한 형태로 한정되는 것이 아닌 것으로 이해되어야 하며, 오히려 첨부된 청구범위에 의해 정의되는 본 발명의 정신과 범위 내에 있는 모든 변형물과 균등물 및 대체물을 포함하는 것으로 이해되어야 한다.In the detailed description of the present invention, only specific embodiments thereof have been described. It is to be understood, however, that the present invention is not limited to the specific forms referred to in the description, but rather includes all modifications, equivalents, and substitutions within the spirit and scope of the invention as defined by the appended claims. Should be.
[부호의 설명][Description of the code]
6 : 뒷차축 조합 8 : 미션 케이스6: rear axle combination 8: mission case
60 : 뒷차동부 케이스 61 ; 차동장치60: rear differential case 61; Differential
62 : 차동축 63 : 감속기어62: differential shaft 63: reduction gear
64 : 차동 고정장치 65 : 뒷차축64: differential fixing device 65: rear axle
66 : 뒷차축 케이스 67 : 작동캠66: rear axle case 67: operation cam
68 : 브레이크 유닛 69 : 운전자 보호구조물(ROPS)68: brake unit 69: driver protection structure (ROPS)
660 : 뒷차축 덮개부 661 : ROPS 장착대660: rear axle cover 661: ROPS mount
662 : 감속기어 덮개부 664 : 차동축 덮개부662: reduction gear cover 664: differential shaft cover
666 : 브레이크 유닛 덮개부 669 : 브레이크 작동레버 장착부666: brake unit cover 669: brake operating lever mounting portion

Claims (20)

  1. 농용 작업차의 뒷차축 케이스에 있어서,In the rear axle case of the agricultural work vehicle,
    뒷차축을 둘러싸는 중공관 형태의 뒷차축 덮개부;A rear axle cover portion in the form of a hollow tube surrounding the rear axle;
    상기 뒷차축 덮개부 측부에 일체형으로 마련되는 감속기어 덮개부;A reduction gear cover part provided integrally with the rear axle cover part side;
    상기 감속기어 덮개부 전단에 일체형으로 형성되어 미션 케이스 바깥으로 연장된 차동축을 덮는 차동축 덮개부; 및A differential shaft cover part integrally formed at the front end of the reduction gear cover part to cover the differential shaft extending out of the mission case; And
    차동축 덮개부의 일측 개구를 커버링 하는 형태로 상기 차동축 덮개부의 개구 측에 일체로 제공되어 미션 케이스와의 사이에 다판식 브레이크 유닛이 설치될 수 있는 공간을 형성시키는 브레이크 유닛 덮개부;를 포함하는 농용 작업차의 뒷차축 케이스.A brake unit cover part integrally provided at the opening side of the differential shaft cover part to form a space in which the multi-plate type brake unit can be installed between the mission case and a cover to cover one opening of the differential shaft cover part; Rear axle case of agricultural work vehicle.
  2. 제 1 항에 있어서,The method of claim 1,
    상기 감속기어 덮개부에는, 상기 차동축 측과 동력 전달 가능하게 접속되는 감속기어 배치를 위한 감속기어 수용공간이 제공되고, 상기 뒷차축 덮개부 반대편의 미션 케이스와 접하는 측이 개구된 구성인 것을 특징으로 하는 농용 작업차의 뒷차축 케이스.The reduction gear cover portion is provided with a reduction gear accommodating space for arranging the reduction gear which is connected to the differential shaft side so as to transmit power, and the side contacting with the mission case opposite the rear axle cover portion is configured to open. Rear axle case of agricultural work vehicle to assume.
  3. 제 1 항에 있어서,The method of claim 1,
    상기 차동축 덮개부는, The differential shaft cover portion,
    상기 감속기어 덮개부의 내부공간과 통하며 미션 케이스 바깥으로 연장된 상기 차동축을 수용하는 차동축 수용공간과;A differential shaft accommodating space communicating with the internal space of the reduction gear cover part and accommodating the differential shaft extending out of the mission case;
    상기 차동축을 회전 가능하게 지지하는 베어링부재가 정착되는 베어링 정착부;로 구성됨을 특징으로 하는 농용 작업차의 뒷차축 케이스.The rear axle case of the agricultural work vehicle, characterized in that consisting of; bearing fixing unit is fixed to the bearing member for rotatably supporting the differential shaft.
  4. 제 1 항에 있어서,The method of claim 1,
    상기 브레이크 유닛 덮개부의 중앙을 상기 차동축이 관통하며, 차동축이 관통하는 중앙 관통홀 주면에는 베어링 정착면이 제공됨을 특징으로 하는 농용 작업차의 뒷차축 케이스.The rear axle case of the agricultural work vehicle, characterized in that a bearing fixing surface is provided on the main through hole main surface through which the differential shaft penetrates the center of the brake unit cover part.
  5. 제 1 항에 있어서,The method of claim 1,
    상기 차동축 덮개부의 둘레에 일체로 형성되는 브레이크 작동레버 장착부;를 더 포함하는 것을 특징으로 하는 농용 작업차의 뒷차축 케이스.The rear axle case of the agricultural work vehicle further comprises; brake operation lever mounting portion formed integrally around the differential shaft cover portion.
  6. 제 1 항에 있어서,The method of claim 1,
    상기 감속기어 덮개부의 중심과 차동축 덮개부의 중심, 그리고 뒷차축 덮개부 중심의 높이가 동일한 것을 특징으로 하는 농용 작업차의 뒷차축 케이스.The rear axle case of the agricultural work vehicle, characterized in that the height of the center of the reduction gear cover portion, the center of the differential shaft cover portion, and the center of the rear axle cover portion.
  7. 제 6 항에 있어서,The method of claim 6,
    상기 차동축 덮개부와 뒷차축 덮개부 보다 상기 감속기어 덮개부의 직경이 큰 것을 특징으로 하는 농용 작업차의 뒷차축 케이스.The rear axle case of the agricultural work vehicle, characterized in that the diameter of the reduction gear cover portion is larger than the differential shaft cover portion and the rear axle cover portion.
  8. 제 6 항에 있어서,The method of claim 6,
    상기 뒷차축 덮개부의 중심과 감속기어 덮개부의 중심이 일치하는 것을 특징으로 하는 농용 작업차의 뒷차축 케이스.The rear axle case of the agricultural work vehicle, characterized in that the center of the rear axle cover portion and the center of the reduction gear cover portion.
  9. 제 1 항에 있어서,The method of claim 1,
    상기 뒷차축 덮개부와 감속기어 덮개부 외연 후부에 일체로 형성되는 운전자 보호구조물(ROPS; Roll Over Protective Structure) 장착을 위한 ROPS 장착대;를 더 포함하는 것을 특징으로 하는 농용 작업차의 뒷차축 케이스.The rear axle case of the agricultural work vehicle further comprises a; ROPS mount for mounting the driver over the rear axle cover portion and the rear end of the reduction gear cover portion (ROPS; Roll Over Protective Structure) .
  10. 제 9 항에 있어서,The method of claim 9,
    상기 ROPS 장착대 하부의 상기 뒷차축 덮개부 또는 감속기어 덮개부 외연에 일체로 형성되는 로워링크 부착대; 및A lower link mount integrally formed at an outer edge of the rear axle cover portion or the reduction gear cover portion below the ROPS mount; And
    상기 로워링크 부착대 인접 측부에 형성되는 체크링크 부착면;을 더 포함하는 농용 작업차의 뒷차축 케이스.The rear axle case of the agricultural work vehicle further comprises; check link attachment surface formed on the adjacent side of the lower link attachment.
  11. 제 1 항에 있어서,The method of claim 1,
    상기 감속기어 덮개부 상부 외연에 일체로 형성되며 시트 프레임 지지대 설치를 위한 취부면을 제공하는 시트 프레임 지지대 장착구;를 더 포함하는 농용 작업차의 뒷차축 케이스. The rear axle case of the agricultural work vehicle further comprising; a seat frame support mounting portion formed integrally with the reduction gear cover upper outer edge and providing a mounting surface for installing the seat frame support.
  12. 제 1 항 내지 제 11 항 중 어느 하나의 항에 기재된 좌우 한 쌍의 뒷차축 케이스;A pair of left and right rear axle cases according to any one of claims 1 to 11;
    상기 뒷차축 케이스들 사이에 배치되는 뒷차동부 케이스;A rear differential case disposed between the rear axle cases;
    상기 뒷차동부 케이스에서 뒷차축 케이스에 걸쳐 서로 동력 전달 가능하게 배치되는 전동부재들; 및Transmission members arranged to be capable of transmitting power to each other across the rear axle case in the rear vehicle case; And
    뒷차축 케이스와 뒷차동부 케이스 사이에 장치되어 차량 정지를 위한 제동력을 발생시키는 브레이크 유닛;을 포함하는 농용 작업차의 뒷차축 조합.And a brake unit provided between the rear axle case and the rear wheel case to generate a braking force for stopping the vehicle.
  13. 제 12 항에 있어서,The method of claim 12,
    상기 뒷차축 케이스의 외연 후부에 일체로 형성되는 ROPS 장착대에 지지되는 운전자 보호구조물(ROPS);을 더 포함하는 농용 작업차의 뒷차축 조합.The rear axle combination of the agricultural work vehicle further comprising; a driver protection structure (ROPS) supported by the ROPS mounting unit is formed integrally with the rear edge of the rear axle case.
  14. 제 13 항에 있어서,The method of claim 13,
    상기 ROPS 장착대 하부 뒷차축 덮개부 또는 감속기어 덮개부에 일체로 형성된 로워링크 부착대에 설치되는 후방 작업기 연결을 위한 로워링크; 및A lower link for connecting a rear work machine installed in a lower link mounting unit formed integrally with the rear rear axle cover unit or the reduction gear cover unit; And
    상기 로워링크 부착대 인접 측부의 체크링크 부착면에 설치되고 상기 로워링크와 연결되는 로워링크 간격조절용 체크링크;를 더 포함하는 농용 작업차의 뒷차축 조합.The lower axle combination of the agricultural work vehicle further comprises; a lower link spacing adjustment check link is installed on the check link attaching surface adjacent to the lower link mounting stand and connected to the lower link.
  15. 제 12 항에 있어서,The method of claim 12,
    상기 뒷차축 케이스의 감속기어 덮개부 상부 외연에 일체로 형성된 시트 프레임 지지대 장착구에 설치되는 시트 프레임 지지대;를 더 포함하는 작업차의 뒷차축 조합.The rear axle combination of the work vehicle further comprising; seat frame support which is installed in the seat frame support mounting portion integrally formed on the upper outer edge of the reduction gear cover portion of the rear axle case.
  16. 제 12 항에 있어서,The method of claim 12,
    상기 전동부재들은,The transmission member,
    양쪽 바퀴에 구동력을 배분하는 뒷차동부 케이스 내에 배치된 차동장치와;A differential device disposed in the rear differential case which distributes driving force to both wheels;
    일부가 뒷차동부 케이스 바깥으로 연장되도록 상기 차동장치로부터 좌우로 연장되는 차동축과;A differential shaft extending left and right from the differential such that a portion extends out of the rear differential case;
    뒷차축 케이스의 감속기어 덮개부에 수용되며 뒷차동부 케이스 바깥으로 연장된 상기 차동축에 동력 전달 가능하게 접속되는 감속기어와;A reduction gear housed in the reduction gear cover portion of the rear axle case and connected to the differential shaft extending out of the rear differential portion case so as to transmit power;
    상기 감속기어가 결합되고 뒷차축 케이스의 뒤차축 덮개부 내에 일부가 회전 자유롭게 배치되는 뒷차축;으로 구성되는 것을 특징으로 하는 농용 작업차의 뒷차축 조합.The rear axle combination of the agricultural work vehicle, characterized in that consisting of; the reduction gear is coupled and the rear axle is rotatably disposed in the rear axle cover portion of the rear axle case.
  17. 제 16 항에 있어서,The method of claim 16,
    상기 차동장치의 편향된 동력전달을 제한하는 차동 고정장치;를 더 포함하는 농용 작업차의 뒷차축 조합.The rear axle combination of the farm work vehicle further comprises; a differential fixing device for limiting the biased power transmission of the differential device.
  18. 제 12 항에 있어서,The method of claim 12,
    상기 브레이크 유닛은, The brake unit,
    회전 측 디스크와 고정 측 플레이트가 소정의 간격을 두고 순차 배열된 건식 다판 브레이크 타입이며,It is a dry multi-plate brake type in which the rotating disc and the fixed side plate are sequentially arranged at predetermined intervals.
    일면에 함몰 깊이가 점진적으로 증대되는 볼홈이 원주방향으로 다수 형성된 회전판과, 회전판의 볼홈과 상기 볼홈과 대응되는 뒷차동부 케이스 측의 볼홈 사이에 개재되는 강구를 포함하는 것을 특징으로 하는 농용 작업차의 뒷차축 조합.The agricultural work vehicle, characterized in that it comprises a rotary plate formed in the circumferential direction a plurality of ball grooves in the circumferential direction, the ball groove gradually increasing the depth of depression on one side, and the steel ball interposed between the ball groove of the rotating plate and the ball groove on the side of the rear drive unit case corresponding to the ball groove Rear axle combination.
  19. 제 18 항에 있어서,The method of claim 18,
    상기 회전판의 둘레 일부에 제동력 발생을 위한 회전력이 입력되는 입력단이 일체로 구비되고, 상기 입력단과 캠 접촉하는 캠면을 구비한 작동캠;을 더 포함하는 농용 작업차의 뒷차축 조합.Combination of the rear axle with a farming work vehicle further comprises; an input end which is integrally provided with an input end to which the rotational force for generating a braking force is input, the cam having a cam surface in contact with the input end.
  20. 제 19 항에 있어서,The method of claim 19,
    상기 작동캠에 접촉하는 입력단의 접촉면은 평면이며, The contact surface of the input end contacting the actuating cam is flat,
    작동캠은 상기 입력단의 접촉면과 접하는 평면부와 평면부 배면의 원호형상의 곡면부로 구성됨을 특징으로 하는 농용 작업차의 뒷차축 조합.Operation cam is a rear axle combination of a farming work vehicle, characterized in that consisting of a curved surface portion of the flat portion and the flat portion in contact with the contact surface of the input end.
PCT/KR2015/005356 2014-05-29 2015-05-28 Rear axle case of agricultural work vehicle and rear axle assembly of agricultural work vehicle, including same WO2015183011A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201580005621.1A CN106414141B (en) 2014-05-29 2015-05-28 The rear car axle assembly of the rear car axle housing of agricultural work car and the agricultural work car including this
US15/112,863 US9919558B2 (en) 2014-05-29 2015-05-28 Rear axle case of agricultural work vehicle and rear axle assembly of agricultural work vehicle, including same

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20140065129 2014-05-29
KR10-2014-0065129 2014-05-29
KR10-2014-0131817 2014-09-30
KR1020140131817A KR101876886B1 (en) 2014-05-29 2014-09-30 Rear axle case of an agriculture vehicle and Rear axle assembly of an agriculture vehicle

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63159104A (en) * 1986-12-24 1988-07-02 Isuzu Motors Ltd Rear axle casing
JPH07144504A (en) * 1993-11-26 1995-06-06 Kubota Corp Rear axle case device for tractor
JP2000264085A (en) * 1999-03-18 2000-09-26 Iseki & Co Ltd Rear axle housing for work vehicle
JP2011122709A (en) * 2009-12-14 2011-06-23 Yanmar Co Ltd Brake device
KR20110107278A (en) * 2010-03-24 2011-09-30 가부시끼 가이샤 구보다 Tractor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63159104A (en) * 1986-12-24 1988-07-02 Isuzu Motors Ltd Rear axle casing
JPH07144504A (en) * 1993-11-26 1995-06-06 Kubota Corp Rear axle case device for tractor
JP2000264085A (en) * 1999-03-18 2000-09-26 Iseki & Co Ltd Rear axle housing for work vehicle
JP2011122709A (en) * 2009-12-14 2011-06-23 Yanmar Co Ltd Brake device
KR20110107278A (en) * 2010-03-24 2011-09-30 가부시끼 가이샤 구보다 Tractor

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