KR101829202B1 - Device for adjusting wheel tread of vehicle including inner hydraulic cylinder structure - Google Patents

Device for adjusting wheel tread of vehicle including inner hydraulic cylinder structure Download PDF

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Publication number
KR101829202B1
KR101829202B1 KR1020150152016A KR20150152016A KR101829202B1 KR 101829202 B1 KR101829202 B1 KR 101829202B1 KR 1020150152016 A KR1020150152016 A KR 1020150152016A KR 20150152016 A KR20150152016 A KR 20150152016A KR 101829202 B1 KR101829202 B1 KR 101829202B1
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KR
South Korea
Prior art keywords
shaft
port
housing
axle
vehicle
Prior art date
Application number
KR1020150152016A
Other languages
Korean (ko)
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KR20170051693A (en
Inventor
하종규
이종열
강태경
최덕규
Original Assignee
국제종합기계 주식회사
대한민국(농촌진흥청장)
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Application filed by 국제종합기계 주식회사, 대한민국(농촌진흥청장) filed Critical 국제종합기계 주식회사
Priority to KR1020150152016A priority Critical patent/KR101829202B1/en
Publication of KR20170051693A publication Critical patent/KR20170051693A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
    • B60B35/003—Steerable axles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
    • B60B35/02—Dead axles, i.e. not transmitting torque
    • B60B35/10—Dead axles, i.e. not transmitting torque adjustable for varying track
    • B60B35/1036—Dead axles, i.e. not transmitting torque adjustable for varying track operated with power assistance
    • B60B35/1054—Dead axles, i.e. not transmitting torque adjustable for varying track operated with power assistance hydraulically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
    • B60B35/12—Torque-transmitting axles
    • B60B35/14—Torque-transmitting axles composite or split, e.g. half- axles; Couplings between axle parts or sections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
    • B60B35/12—Torque-transmitting axles
    • B60B35/16—Axle housings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
    • B60B35/12—Torque-transmitting axles
    • B60B35/18—Arrangement of bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2900/00—Purpose of invention
    • B60B2900/50—Improvement of
    • B60B2900/561—Lubrication

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a left and right wheel width adjusting apparatus capable of adjusting left and right wheel widths of a vehicle according to a driving environment of a vehicle,
More particularly, the present invention relates to a vehicle comprising: an axle that receives power transmitted through a transmission and rotates together with a wheel; An axle housing which receives the axle between the wheel and the transmission and is supported by a body frame, the axle comprising: a first shaft connected at one end to the transmission by a power transmission; And a second shaft axially coupled to the first shaft so as to be slidable inwardly or outwardly along the axial direction of the first shaft, the first shaft having one end coupled to the other end of the first shaft in a coaxial manner, To the left and right wheel width adjusting devices of the vehicle.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a device for adjusting the width of a vehicle, including an inner hydraulic cylinder structure,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a left and right wheel width adjusting device for a vehicle, and more particularly, to a left and right wheel width adjusting device capable of adjusting left and right wheel widths of a vehicle according to a driving environment or a road surface condition of the vehicle.

[0002] A vehicle such as a tractor is generally configured to transmit power generated by an engine to an axle via a power transmission device, and is driven to rotate by rotation of the axle.

Fig. 1 is a schematic front view of a vehicle V according to the prior art, and Fig. 2 is a schematic sectional view of an axle 3 and an axle housing 1 according to the prior art.

As shown in Fig. 1, a vehicle V according to the prior art includes a transmission, which is a power transmitting device and a transmission for transmitting power from an engine to a wheel, a transmission for protecting the transmission and fixed to a vehicle body frame And a transmission case (M) supported by the transmission case (3), an axle (3) for receiving power from the transmission, and an axle (3) for protecting and supporting the transmission case (M) And an axle housing (1). In FIG. 1, reference numeral 4 denotes a driven gear which receives power from the transmission, and reference numeral 5 denotes a flange fixed to a disk (or hub) of a tire or a wheel.

Particularly, in the related art, the axle 3 of the vehicle is integrally formed, the driven gear 4 is fixed to one end portion thereof and the tire or the wheel 2 is provided at the other end portion thereof. (1) is integrally formed and fixed to and supported by the transmission case (M) at one end thereof, so that the axle and the axle housing of the vehicle according to the related art can not change the distance along the longitudinal direction of the axle.

Therefore, the vehicle according to the related art can not change the distance (i.e., the wheel tread) between the left and right wheels of the vehicle, and thus the use thereof is limited or limited in terms of the external use environment such as the driving condition or the road surface condition of the vehicle Has existed.

Accordingly, an object of the present invention is to solve the problems of the prior art.

Specifically, it is an object of the present invention to provide a device for adjusting the width of a left and right wheels of a vehicle capable of varying the widths of left and right wheels of the vehicle.

It is also an object of the present invention to provide a device for adjusting the left and right wheel widths of a vehicle in which the structure can be compact and simple to implement.

According to an aspect of the present invention, there is provided a vehicle comprising: an axle that receives power transmitted through a transmission and rotates together with a wheel; An axle housing which receives the axle between the wheel and the transmission and is supported by a body frame, the axle comprising: a first shaft connected at one end to the transmission by a power transmission; And a second shaft axially coupled to the first shaft so as to be slidable inwardly or outwardly along the axial direction of the first shaft, the first shaft having one end coupled to the other end of the first shaft in a coaxial manner, The width of the left and right wheels of the vehicle can be adjusted.

Preferably, the second shaft is slid inward or outward along the axial direction of the first shaft by a hydraulic cylinder.

Further, preferably, the second shaft is configured to form a self hydraulic cylinder structure together with the axle housing.

Preferably, the axle housing further includes: a first housing including the first shaft and an end portion fixedly coupled to a side of the transmission case that receives the transmission; A hydraulic chamber formed in the inside and extending outward at the other end of the first housing to receive a portion of the second shaft; a first port formed to communicate with the hydraulic chamber; And a second housing including a second port formed to communicate with the hydraulic chamber.

Preferably, the axle housing further includes: a partition wall portion dividing the first housing and the second housing, and including a penetration portion through which the second shaft passes.

Preferably, a lubricating member or a supporting bearing made of a material having a high self-lubricating property is provided on the inner side surface of the penetration portion.

Preferably, the second shaft includes a piston-diameter enlarged portion provided on a portion of the second shaft that is accommodated in the hydraulic chamber.

Preferably, when the hydraulic fluid is introduced into the hydraulic chamber through one of the first port and the second port, the first port and the second port are connected to the first port and the second port, And the hydraulic fluid is allowed to flow out of the hydraulic chamber through the other one of the ports.

Preferably, the other end of the first shaft includes a first concentric shaft and a second shaft, the one end of the second shaft has a shape corresponding to the negative portion of the first concentric shaft, And a second concentric shaft axially and concentrically coupled to the joint portion includes a negative portion.

Preferably, the first concentric axis joint portion is one of an female spline and a male spline, and the second concentric axis joint portion is a female spline and a male spline. spline).

Preferably, the first concentric shaft is a female arm spline, and the second concentric shaft is a male spline, and the first housing has a first concentric shaft supporting an outer circumferential surface of a negative portion And a shaft support bearing.

According to the means for solving the above-mentioned problems, the present invention can vary the width of the left and right wheels of the vehicle. Therefore, the present invention can improve the compatibility and usability of the vehicle with respect to the external use environment such as the driving condition or the road surface condition of the vehicle.

In addition, the present invention can realize a compact structure of the left and right wheel width adjusting apparatus of a vehicle, and can significantly reduce the volume and installation space occupied by the left and right wheel width adjusting apparatuses of the present invention in an existing vehicle.

In addition, the present invention can increase or decrease the left and right wheel widths in a state in which the axle and / or the axle housing are not eccentrically unidirectional in one direction, that is, aligned concentrically with each other, in operation of the left and right wheel width adjusting device of the vehicle. That is, according to the present invention, it is possible to perform the process of adjusting the left and right wheel width of the vehicle stably and reliably.

1 is a schematic front view of a vehicle according to the prior art,
2 is a schematic cross-sectional view of an axle and axle housing according to the prior art,
3 is a schematic front view of a vehicle associated with an embodiment of the present invention,
4 is a schematic cross-sectional view of a left and right wheel width adjusting apparatus of a vehicle according to an embodiment of the present invention in a state before the left and right wheel widths are increased,
5 is a schematic cross-sectional view of a left and right wheel width adjusting apparatus of a vehicle according to an embodiment of the present invention in a state where left and right wheel widths are increased,
6 is a schematic block diagram of an in-vehicle component associated with a left and right wheel width adjustment device of a vehicle according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. It should be noted that the drawings denoted by the same reference numerals in the drawings denote the same reference numerals whenever possible, in other drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. And certain features shown in the drawings are to be enlarged or reduced or simplified for ease of explanation, and the drawings and their components are not necessarily drawn to scale. However, those skilled in the art will readily understand these details.

FIG. 3 is a schematic front view of a vehicle V according to an embodiment of the present invention, and FIG. 4 is a side view of a vehicle V according to an embodiment of the present invention, 5 is a schematic cross-sectional view of the left and right wheel width adjusting apparatus 300 of the vehicle V according to an embodiment of the present invention in a state in which the left and right wheel widths are increased 6 is a schematic block diagram of components in the vehicle V associated with the left and right wheel-width adjustment device 300 of the vehicle V according to an embodiment of the present invention.

3, the vehicle V according to an embodiment of the present invention includes a transmission that is a power transmission device and transmission that transmits power from the engine to the wheels 700, A transmission case M fixed and supported by a chassis of the vehicle body; an axle 400 receiving power from the transmission and rotating together with the wheel 700; An axle housing 500 that protects, supports, or receives the axle 400 and is fixed or supported by the transmission case M and / or the vehicle body frame, And a left and right wheel width adjusting device 300 for adjusting the left and right wheel widths of the vehicle V. [

3 to 5, the left and right wheel width adjusting apparatus 300 is provided in each of the left wheel 700 and the right wheel 700, 400 to increase or decrease the length of the left and right wheels of the vehicle.

The left and right wheel width adjusting apparatus 300 according to the present invention is incorporated in the axle 400 and the axle housing 500.

6, the vehicle V according to the embodiment of the present invention includes an input unit 110 (for example, an operation switch) provided in the driver's seat of the vehicle V, A left hydraulic pump 130 for supplying and discharging hydraulic fluid to and from the left and right wheel width adjusting devices 300 provided in the left wheel 700 of the vehicle V, A right hydraulic pump 140 for supplying and discharging hydraulic fluid to and from the left and right wheel width regulating apparatus 300 and a hydraulic pump 140 for fluidly connecting to the left hydraulic pump 130 and the right hydraulic pump 140, The first and second ports 525 and 527 of the left and right wheel width adjusting apparatus 300 and the left and right hydraulic pumps 130 and 140 according to the input signals received from the input unit 110. [ The first port 525 and the second port 527, and a control unit 120 for controlling the flow direction of the hydraulic fluid.

As an alternative embodiment, one integrated hydraulic pump may be used in place of the left hydraulic pump 130 and the right hydraulic pump 140. [

Hereinafter, the left and right wheel width adjusting apparatus 300 of the vehicle V according to the present invention will be described in more detail with reference to the drawings.

3 and 4, the left and right wheel width adjusting apparatus 300 of the vehicle V according to an embodiment of the present invention includes a first shaft (not shown) divided into an inner shaft and an outer shaft An axle 400 including a first shaft 410 and a second shaft 420 and an axle housing 500 including a first housing 510 and a second housing 520 partitioned from each other along the axial length direction .

That is, the left and right wheel width adjusting device 300 of the vehicle V includes a first shaft 410 connected to the transmission by a power transmission unit 600 at one end, A first housing 510 that receives the first shaft 410 and a second housing 520 that serves as a hydraulic cylinder, and a second housing 420 . Here, the second shaft 420 is fixed to the fixed first shaft 410 in the axial direction (i.e., in the direction from the wheel 700 and the transmission toward the wheel 700) and / (I.e., in the direction toward the transmission 700 in the transmission and the transmission).

Specifically, the first shaft 410 is accommodated in the first housing 510, has one end located inside and equipped with the power transmission portion 600 (for example, gears) And a first concentric axis connected to the shaft 420 includes the other end having the negative portion 411. [

The first shaft 410 is connected to the transmission through the power transmission unit 600 and receives the power of the engine. The first shaft 410 rotates by the power, and the inner shaft and the outer shaft So that the first housing 510 is not moved to the first housing 510.

Preferably, the first concentric annular axis 411 may be one of a female spline and a male spline, and the second concentric axis may have a shape corresponding to the negative part and / Shaped shape.

The second shaft 420 is configured to be slid inward or outward along the axial direction of the first shaft 410 by a hydraulic cylinder.

According to the present invention, the second shaft 420 is configured to form a self hydraulic cylinder structure together with the axle housing 500 (or the second housing 520). Therefore, according to the present invention, a part of the axle 400 and a part of the axle housing 500 are structured by a self hydraulic cylinder without an external driving unit such as a separate external hydraulic cylinder, so that the size of the left and right wheel width adjusting device 300 of the vehicle V It is possible to minimize the installation space of the left and right wheel width adjusting apparatus 300 of the vehicle V and simplify the structure of the left and right wheel width adjusting apparatus 300 of the vehicle V. [

Specifically, the second shaft 420 includes a first end coupled coaxially with the other end of the first shaft 410, and a flange 427 coupled to the disk or hub of the wheel 700. And a piston diameter enlarged portion 423 provided between the one end portion and the other end portion.

The second shaft 420 is coupled to the first shaft 410 in the axial direction of the first shaft 410. The one end of the second shaft 420 is coupled to the other end of the first shaft 410, And is axially coupled to the first shaft 410 so as to be slidable.

One end of the second shaft 420 includes a second concentric axis 421 having a shape corresponding to the first concentric axis 411. The first concentric shaft 421 is concentrically coupled to the first concentric shaft 411 and the first shaft 410 and the second shaft 420 are coupled to each other by the power of the engine The first concentric axis is axially coupled to the negative portion 411 so as to be rotatable together.

In addition, the first concentric axis and the second concentric axis concave 421 are operated such that the second axis 420 is spaced outward along the axial direction with respect to the first axis 410, The first shaft 410 and the second shaft 420 are connected to rotate together.

Preferably, when the first concentric annular axis 411 is one of an female spline and a male spline, the second concentric annular axis 421 may be a female spline, And the other of the male splines.

As will be described later, more preferably, the first concentric axial bending portion 411 is an arm spline and the second concentric bending portion 421 is a male spline.

The piston diameter portion 423 is formed at a position corresponding to the hydraulic chamber 523 of the second housing 520, which will be described later, between one end portion and the other end portion of the second shaft 420. The diameter portion 423 for the piston has a diameter larger than the diameter of the main body of the second shaft 420 due to the hydraulic pressure of the hydraulic fluid supplied from the hydraulic pump and is provided in the hydraulic chamber 523 in the axial direction And is configured to be slid inward or outward.

That is, the piston diameter portion 423 functions as a piston in a general hydraulic cylinder, and the body of the second shaft 420 functions as a piston rod in a general hydraulic cylinder.

Accordingly, the piston diameter-enlarged portion 423 of the second shaft 420 and the hydraulic chamber 523 of the second housing 520 to be described later can form a structure similar to one hydraulic cylinder.

By including the piston diameter enlarged portion 423 and the hydraulic chamber 523 of the second housing 520 in the present invention, the second shaft 420 is moved outwardly along the axial direction with respect to the first shaft 410 One side surface of the enlarged diameter portion 423 of the piston and the second shaft 420 can be pushed out in a concentric manner with the second shaft 420 with a uniform hydraulic pressure in the circumferential direction as a whole, 420 can be minimized or prevented from being eccentric to one side when sliding.

The axle housing 500 is supported by a vehicle body frame. In addition, the axle housing 500 may be supported on the left and right sides of the mission case M, respectively.

The axle housing 500 according to the present invention includes a first housing 510 and a second housing 520 partitioned into an inner side portion and an outer side portion along the axial length direction.

The first housing 510 accommodates a part of the first shaft 410 and the second shaft 420 in the longitudinal direction and has an outer surface of the first shaft 410 and the outer surface of the second shaft 420, And may have an outer diameter larger than an outer diameter of the first shaft 410 and the second shaft 420 to be in a non-contact state. The first housing 510 includes an end fixedly coupled to or supported by a side surface of the transmission case M that receives the transmission.

The other end of the first housing 510 is provided with a partition 540 for dividing or partitioning the first housing 510 and the second load 520. That is, one end of the axle housing 500 is fixed to a part of the inner circumferential surface of the axle housing 500 in the longitudinal direction, and the other end of the axle housing 500 protrudes in the axial direction of the axle of the axle 400, 2 may further include a partition wall portion 540 that divides an inner space of the housing 520 and has a through portion through which the second shaft 420 passes.

Here, since the penetrating portion can serve as a portion for supporting the second shaft 420, a supporting bearing can be provided on the inner side surface of the penetrating portion, in which the second shaft 420 is rotatably supported.

As an alternative embodiment, a lubrication member made of a high self-lubricative material may be provided on the inner side surface of the penetration portion in place of the support bearing.

In this way, the second shaft 420 is rotatably supported by the penetrating portion, so that the second shaft 420 can be stably supported even if it slides inward or outward along the axial direction.

The second housing 520 receives a portion of the second shaft 420 and is formed integrally and axially outwardly at the other end of the first housing 510 and the partition 540.

The second housing 520 includes a hydraulic chamber 523 formed therein, a first port 525 formed to communicate with the hydraulic chamber 523, and a second port 525 located outside the first port 525, And a second port 527 formed to communicate with the hydraulic chamber 523. The first port 525 and the second port 527 serve as an inlet through which the hydraulic fluid is supplied from the left hydraulic pump 130 and / or the right hydraulic pump 140 to the hydraulic chamber 523; And / or the hydraulic fluid is discharged from the hydraulic chamber 523 to return to the left hydraulic pump 130 and / or the right hydraulic pump 140.

The first port 525 and the second port 527 are formed such that the piston diameter portion 423 is always positioned between the first port 525 and the second port 527.

In this state, the first port 525 and the second port 527 communicate with each other through a port of one of the first port 525 and the second port 527, The hydraulic fluid is discharged from the hydraulic chamber 523 through the other one of the first port 525 and the second port 527. This operation control is performed by the controller 120, Lt; / RTI >

Thus, for example, as shown in FIG. 5, the first port 525 functions as a hydraulic fluid inlet, while the second port 527 functions as a hydraulic fluid outlet, The right side surface of the piston diameter portion 423 in the hydraulic chamber 523 receives the hydraulic pressure of the hydraulic fluid flowing from the first port 525 and the right side surface of the piston in the hydraulic chamber 523, The left side surface of the neck portion 423 receives the back pressure of the hydraulic fluid flowing through the second port 527 so that the enlarged diameter portion of the piston can slide with greater force. That is, the present invention can improve the efficiency, the maximum tensile force and the compressive force of the self hydraulic cylinder.

Preferably, the first concentric shaft boss 411 is an arm spline, and the second concentric boss shaft 421 is a number spline. The first housing 510 includes a first concentric shaft The shaft supporting the outer peripheral surface of the joint portion 411 may include a negative support bearing. As a result, the second shaft 420 slides outward relative to the first shaft 410, and the first concentric shaft engaging area between the engaging portion 411 and the second concentric shaft 421 is The first shaft 410 and the second shaft 420 can be stably supported by bearings.

As described above, the present invention can vary the width of the left and right wheels of the vehicle. Therefore, the present invention can improve the compatibility and usability of the vehicle with respect to the external use environment such as the driving condition or the road surface condition of the vehicle.

In addition, the present invention can realize a compact structure of the left and right wheel width adjusting apparatus of a vehicle, and can significantly reduce the volume and installation space occupied by the left and right wheel width adjusting apparatuses of the present invention in an existing vehicle.

In addition, the present invention can increase or decrease the left and right wheel widths in a state in which the axle and / or the axle housing are not eccentrically unidirectional in one direction, that is, aligned concentrically with each other, in operation of the left and right wheel width adjusting device of the vehicle. That is, according to the present invention, it is possible to perform the process of adjusting the left and right wheel width of the vehicle stably and reliably.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And the like. Accordingly, such modifications are deemed to be within the scope of the present invention, and the scope of the present invention should be determined by the following claims.

V: vehicle related to one embodiment of the present invention
M: Transmission case
110: input unit
120:
130: Left hydraulic pump
140: Right hydraulic pump
300: Vehicle left and right wheel width adjustment device
400: axle
410: 1st axis
411: First concentric axis
420: 2nd axis
421: second concentric axis
423:
427:
500: Axle housing
510: first housing
511:
520: second housing
521: Self-Hydraulic Cylinder
523: Hydraulic chamber
525: First port
527: second port
600: Power transmission section
700: Wheel

Claims (11)

An axle that receives power transmitted through the transmission and rotates with the wheel;
An axle housing that receives the axle between the wheel and the transmission and is supported by the vehicle body frame,
The axle includes:
A first shaft connected at one end to the transmission by a power transmission portion;
And a second shaft axially coupled to the first shaft so as to be slidable inwardly or outwardly along the axial direction of the first shaft, the first shaft being axially coupled to the other end of the first shaft,
The second shaft is slid inward or outward along the axial direction of the first shaft by the hydraulic cylinder,
Said second shaft forming a self hydraulic cylinder structure together with said axle housing,
Wherein the axle housing includes:
And a second shaft having a first outer diameter and a second outer diameter larger than an outer diameter of the first shaft and the second shaft so as to be in contact with the outer surfaces of the first shaft and the second shaft, A first housing including an end fixedly coupled to a side surface of the transmission case;
A hydraulic chamber formed in the inside and extending outward at the other end of the first housing to receive a portion of the second shaft; a first port formed to communicate with the hydraulic chamber; And a second housing including a second port formed to communicate with the hydraulic chamber,
Wherein the first housing has an inner space having an outer diameter larger than an outer diameter of the first and second shafts,
Wherein the axle housing includes:
Wherein one end is fixed to the inner circumferential surface of the axle housing and the other end is protruded in the axial direction of the axis of rotation of the axle to divide the inner space of the first housing and the second housing, And a partition wall portion formed on the substrate,
A lubricating member or a support bearing made of a material having a high self-lubricating property is provided on the inner side surface of the through portion,
Wherein the second shaft includes a piston enlarged portion provided in a portion accommodated in the hydraulic chamber in the second axis,
Wherein the first port and the second port comprise:
Wherein when the hydraulic fluid flows into the hydraulic chamber through one of the first port and the second port, the hydraulic fluid is discharged from the hydraulic chamber through the other one of the first port and the second port. Working,
And the other end of the first shaft includes a first concentric axis including a negative portion,
Wherein one end of the second shaft includes a second concentric axis whose first concentric axis has a shape corresponding to a negative part and in which the first concentric axis is axially concentrically coupled to the negative part,
Wherein the first concentric annular concave portion is one of an female spline and a male spline,
And the second concentric axis joint part is the other one of the female spline and the male spline,
Wherein the first concentric axis is a female spline,
Wherein the second concentric axis is a negative spline,
The first housing further includes a shaft support bearing inside which the first concentric shaft supports the outer circumferential surface of the concave portion,
The second concentric axis provided at one end of the second shaft is axially coupled directly to the negative portion and the first concentric axis provided at the other end portion of the first axis are complementary to each other Lt; / RTI &
An input unit provided in a driver's seat of the vehicle;
A left hydraulic pump fluidly connected to the first port and the second port provided in the left wheel of the vehicle to supply the hydraulic fluid;
A right hydraulic pump that is fluidly connected to the first port and the second port provided on the right wheel of the vehicle and supplies the hydraulic fluid; And
And a control unit for controlling the flow direction of the hydraulic fluid supplied from the left hydraulic pump or the right hydraulic pump according to an input signal received from the input unit. delete delete delete delete delete delete delete delete delete delete
KR1020150152016A 2015-10-30 2015-10-30 Device for adjusting wheel tread of vehicle including inner hydraulic cylinder structure KR101829202B1 (en)

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KR1020150152016A KR101829202B1 (en) 2015-10-30 2015-10-30 Device for adjusting wheel tread of vehicle including inner hydraulic cylinder structure

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KR101829202B1 true KR101829202B1 (en) 2018-02-19

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KR20200129636A (en) 2019-05-09 2020-11-18 엘에스엠트론 주식회사 Wheel tread vairable axle assembly for agricultural working vehicle
KR102647519B1 (en) 2019-05-09 2024-03-14 엘에스엠트론 주식회사 Wheel tread vairable axle assembly for agricultural working vehicle
KR20200129632A (en) 2019-05-09 2020-11-18 엘에스엠트론 주식회사 Wheel tread vairable axle assembly for agricultural working vehicle

Cited By (1)

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