KR20170022150A - Safty steering system - Google Patents

Safty steering system Download PDF

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Publication number
KR20170022150A
KR20170022150A KR1020150116776A KR20150116776A KR20170022150A KR 20170022150 A KR20170022150 A KR 20170022150A KR 1020150116776 A KR1020150116776 A KR 1020150116776A KR 20150116776 A KR20150116776 A KR 20150116776A KR 20170022150 A KR20170022150 A KR 20170022150A
Authority
KR
South Korea
Prior art keywords
drive shaft
final drive
differential
gear
shaft
Prior art date
Application number
KR1020150116776A
Other languages
Korean (ko)
Inventor
이동현
권익현
문철우
박지현
이상엽
이재연
조장희
최우성
하유신
유장영
Original Assignee
경북대학교 산학협력단
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.)
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Publication date
Application filed by 경북대학교 산학협력단 filed Critical 경북대학교 산학협력단
Priority to KR1020150116776A priority Critical patent/KR20170022150A/en
Publication of KR20170022150A publication Critical patent/KR20170022150A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D11/00—Steering non-deflectable wheels; Steering endless tracks or the like
    • B62D11/02—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides
    • 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
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D11/00—Steering non-deflectable wheels; Steering endless tracks or the like
    • B62D11/02—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides
    • B62D11/06—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source
    • B62D11/08—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using brakes or clutches as main steering-effecting means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • F16H37/06—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • F16H37/08—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts with differential gearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H48/00—Differential gearings
    • F16H48/20—Arrangements for suppressing or influencing the differential action, e.g. locking devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/037—Gearboxes for accommodating differential gearings

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Retarders (AREA)

Abstract

Thereby providing a safety steering device.
The safety steering apparatus includes a final drive shaft gear for receiving power from the outside, a left final drive shaft and a right final drive shaft which are formed in a direction perpendicular to the rotating body of the final drive shaft gear and rotate with respect to the center shaft when receiving power, And the left final driving shaft and the right final driving shaft to transmit the power received from the outside through the final driving shaft to the left final driving shaft and the right final driving shaft. When a load is applied to the left final driving shaft or the right final driving shaft A differential gear device for controlling the rotation speed of the left final drive shaft or the right final drive shaft differently according to a load applied to the differential gear device when the user performs an operation for locking the differential gear device such that the left final drive shaft and the right final drive shaft simultaneously rotate , The left final drive shaft The group the right final drive shaft to rotate at the same time may comprise a differential lock dog sleeve to secure the differential gear device.

Description

[0001] SAFETY STEERING SYSTEM [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety steering apparatus and, more particularly, to a safety steering apparatus using a differential gear device designed to be compatible with a conventional agricultural machine and an automatic locking device, To a safety steering device capable of adjusting the steering angle.

Tiller cultivator is a necessity equipment which is used for farming and multipurpose by purchasing almost one every farmhouse. It is expected that it will be widely used in the future because it is cheap and durable and has little trouble.

[Background Art] Generally, tillage machines are two-wheeled agricultural machinery, and have a steering clutch that controls the power transmitted from the engine to both wheels directly to the wheels so that the power transmitted to the wheels is controlled through the steering clutch, Lt; / RTI > According to this configuration, when the cultivator is steered in the flat ground, the clutch is operated in the direction in which the steering is to be performed and the power is interrupted, so that the steering wheel can be steered without turning the wheels.

On the other hand, unlike general vehicles, cultivators tend to run on unpaved roads with heavy farming or bending for agricultural work, and there is a specific mechanism that normally rotates direction by manipulating the steering clutch lever on the downhill or reverse side , It is difficult and uncomfortable to operate differently according to the cultivating environment of the cultivator, so it is a very dangerous equipment that can cause a serious accident if not paying special attention during operation.

Although the tiller cultivator is a universal agricultural machine used mostly in rural areas, the safety and convenience of operation are not considered very well. However, when the tiller is used and the tiller is operated, The frequency is gradually increasing.

The reason why conventional tillers are dangerous in this way is due to the problem of the unusual power transmission method. That is, since the direction of the power transmission system of the tiller is changed in such a manner that the left and right power of the front wheel is blocked by the steering clutch lever of the steering wheel during operation of the tiller, the operation of the tiller is difficult , The power-cut wheels are in a free-rotating state, so there is a safety risk due to a sudden turn if the steering clutch lever is pivoted at high speed. In addition, when the vehicle is downhill or backward, the steering clutch lever of the steering wheel needs to be pulled in the opposite direction. Thus, a skilled driver may cause a serious accident due to a momentary mistake.

One aspect of the present invention is to transmit power to two wheels at all times during straight running and turning, thereby preventing the wheels from rotating freely during turning, and thus the tiller driver can control the tiller Provided is a safety steering apparatus employing a differential gear designed to be compatible with an existing tiller steering apparatus capable of adjusting the direction.

Another aspect of the present invention provides a safety steering apparatus employing a differential gear lock apparatus for securing the required straightness in working in agricultural land in a safety steering apparatus using the proposed differential gear.

The safety steering apparatus according to an embodiment of the present invention includes a final drive shaft gear for receiving power from the outside, a left final drive shaft that is formed in a direction perpendicular to the rotating body of the final drive shaft gear, The final drive shaft, the final drive shaft, the left final drive shaft and the right final drive shaft to transmit the power received from the external drive shaft gear to the left final drive shaft and the right final drive shaft, A differential gear device for controlling the rotational speed of the left final drive shaft or the right final drive shaft differently according to a load applied when the load is applied to the right final drive shaft and a differential gear device for allowing the user to rotate the left final drive shaft and the right final drive shaft simultaneously, If you want to do something to lock the device And a differential lock dog sleeve for fixing the differential gear device such that the left final drive shaft and the right final drive shaft rotate simultaneously.

The differential gear device includes a differential gear unit case coupled to a disk-shaped rotary member of the final drive shaft gear and rotated together with the differential gear unit case, the differential gear unit case being formed to pass through the differential gear unit case, A differential pinion shaft rotatably connected to the differential pinion shaft and receiving power; a differential pinion formed on both ends of the differential pinion shaft such that a circular rotary plate passes through the differential pinion shaft in the differential gear unit case; A left differential side gear coupled to the left final drive shaft to transmit the power of the differential pinion to the left final drive shaft, and a second differential side gear formed so as to be perpendicular to the differential pinion, And the center portion is engaged with the right final drive shaft, And a right differential side gear that transmits power to the right final drive shaft.

When the load is applied to the left final drive shaft or the right final drive shaft, the differential pinion makes revolution by the differential pinion shaft, and when a load is applied to the left final drive shaft or the right final drive shaft, The revolution and the rotation of the differential pinion itself may occur at the same time.

The differential lock dog sleeve is engaged with the differential gear unit case when the user performs an operation for locking the differential gear unit so that the left final drive shaft and the right final drive shaft simultaneously rotate, And mechanically integrating the drive shaft and the right final drive shaft.

The left final drive shaft may be formed so as to penetrate the center of the rotation shaft of the final drive shaft gear and may be provided with a bearing for not directly transmitting power to the contact surface between the final drive shaft gear and the left final drive shaft .

The safety steering apparatus according to one aspect of the present invention applies a differential gear device that adjusts the rotational speed of both wheels differently according to a load applied by a person to a conventional tiller steering device, thereby allowing the driver to intuitively till the tiller Allow to turn.

Another aspect of the present invention is to ensure the straightness necessary for working in farmland through the differential gear lock device that controls the rotational speeds of both wheels to be the same.

1 is a plan view showing a configuration of a safety steering apparatus according to an embodiment of the present invention.
2 is a plan view showing an internal configuration of a differential gear unit case according to an embodiment of the present invention.
3 is a plan view showing a configuration of a differential pinion shaft and a differential pinion according to an embodiment of the present invention.
4 is a plan view showing a configuration of a differential pinion and a differential side gear according to an embodiment of the present invention.
5 is a plan view showing a configuration of a differential side gear and a final drive shaft according to an embodiment of the present invention.
6A is a plan view showing a configuration when the differential lock dog sleeve according to the embodiment of the present invention is released.
FIG. 6B is a plan view showing a structure when a differential lock dog sleeve according to an embodiment of the present invention is combined. FIG.
Fig. 7A is a conceptual diagram showing the flow of gears of the differential gear device when going straight according to an embodiment of the present invention. Fig.
Fig. 7B is a conceptual diagram showing the flow of gears of the differential gear device when the vehicle is turning clockwise according to an embodiment of the present invention. Fig.

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with an embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

Although the present invention has been described in relation to a safety steering apparatus for a cultivator, the safety steering apparatus is not limited to a cultivator, but can be applied to all fields using a steering apparatus.

Generally, the cultivator can be divided into a transmission unit, a steering unit (A), and a final drive unit (B).

The transmission unit can receive the power generated by the engine. The transmission unit can transmit the transmitted power to the steering unit A through the gear train in the transmission unit. The transmission unit can control the gear of the tiller through the operation of the lever or the steering wheel. Controlling the gears of the cultivator may be forward or backward. The gear train inside the transmission unit at this time is composed of a multi-stage forward gear and a reverse gear, and may include a shift fork, a shift lever, and the like for shifting gears.

Meanwhile, the safety steering apparatus according to an embodiment of the present invention is designed to be compatible with the transmission structure commonly used in a conventional cultivator, and can be applied without any additional technical measures to the existing farm machinery.

The safety steering apparatus according to an embodiment of the present invention will be described in more detail with reference to the drawings.

FIG. 1 is a plan view of a safety steering apparatus according to an embodiment of the present invention. FIG. 2 is a plan view showing an internal structure of a differential gear unit case according to an embodiment of the present invention. FIG. 4 is a plan view showing the configuration of a differential pinion and a differential side gear according to an embodiment of the present invention, and FIG. 5 is a plan view of a differential pinion shaft and a differential pinion according to an embodiment Fig. 7 is a plan view showing a configuration of a differential side gear and a final drive shaft according to an example.

1 to 5, the safety steering apparatus may include a steering unit A and a final driving unit B. The power transmitted from the transmission unit may be transmitted to the final driving unit (not shown) through the steering unit A B to rotate the wheel.

The steering unit A of the safety steering apparatus can receive the transmitted power from the transmission unit. The steering unit A can transmit the transmitted power to the final driving unit B through the internal gear train of the steering unit A. [ The steering unit A at this time may include the auxiliary speed change portion A1 and the steering clutch portion A2.

The auxiliary speed change section A1 may transmit the power transmitted from the transmission unit to the steering clutch unit A2. To this end, the auxiliary speed change section A1 may include the auxiliary transmission shaft 10 and the auxiliary transmission 11.

More specifically, the auxiliary transmission 11 of the auxiliary speed change section A1 may be engaged with a driven gear that finally transmits the power supplied from the transmission portion, and the auxiliary transmission 11 may be a gear- So that the center of the transmission shaft 10 passes through the auxiliary transmission shaft 10. At this time, a C-type stop ring may be formed on the auxiliary transmission shaft 10 in order to prevent the auxiliary transmission 11 from deviating from the designated position. The auxiliary transmission shaft 10 may be positioned to penetrate through the outer case, and ball bearings may be formed at both ends to enable idling. Accordingly, the power transmitted to the auxiliary transmission 11 is transmitted to the auxiliary transmission shaft 10 through the auxiliary transmission shaft 10 because the force of the auxiliary transmission shaft 10 is not transmitted to the outer case although the outer case and the auxiliary transmission shaft 10 are engaged. So as to rotate about the central axis of the auxiliary transmission shaft 10.

The auxiliary transmission shaft 10 according to another embodiment may be provided with a ball bearing for idling at a portion in contact with the rotating body of the auxiliary transmission 11 so that power can be transmitted only to the gear.

The auxiliary transmission shaft 10 according to another embodiment of the present invention may include a differential lock control gear engaged to control the differential lock device of the final drive portion B. [ The differential lock control gear can be fixedly engaged with the outer groove of the differential lock dog sleeve 41 so as to control the differential lock dog sleeve 41 of the differential lock. At this time, the differential lock control gear can be moved in a direction parallel to the reduction gear shaft 10.

The steering clutch A2 can transmit the power received from the auxiliary speed change portion A1 to the final driving portion B. [ To this end, the steering clutch portion A2 may include a steering clutch shaft 20, a steering clutch shaft gear 21, and a steering clutch shaft pinion 22. [

More specifically, the steering clutch shaft gear 21 can be positioned in the steering clutch shaft 20 with the center of the rotating body passing therethrough, and the auxiliary transmission portion A1 The auxiliary transmission 11 can be positioned to engage with the gear. On the other hand, the steering clutch shaft pinion 22 may be positioned so that the center of the rotating body passes through the steering clutch shaft (), and the steering clutch shaft pinion 22 is coupled to the steering clutch shaft gear 21, And can transmit the power to the final driving unit B. The steering clutch shaft 20 can be positioned to penetrate the outer case and to prevent the position of the steering clutch shaft pinion 21 from deviating from the position of the steering clutch shaft pinion 22, (21).

The steering clutch shaft gear 21 and the steering clutch shaft pinion 22 can rotate integrally with respect to the central axis of the steering clutch shaft 20 in combination with the steering clutch shaft 20. At this time, the steering clutch shaft 20 can be formed with ball bearings for idling at both ends of the steering clutch shaft 20. Accordingly, the power of the steering clutch shaft 20 is not transmitted to the outer case, so that the steering clutch shaft 20 can rotate integrally with respect to the central axis of the steering clutch shaft 20. [

The steering clutch shaft pinion 21 and the steering clutch shaft pinion 22 are formed in a portion contacting the steering clutch shaft so that the steering clutch shaft pinion gear 21 and the steering clutch shaft pinion 22 It is possible to prevent the power from being transmitted to the steering clutch shaft 20.

On the other hand, the steering clutch part A2 can be provided with a spring device on the steering clutch shaft 20 between the steering clutch shaft pinion 22 and the outer case, and through this spring device, . More specifically, the steering clutch section A2 applies a force to the steering clutch shaft pinion 22 in accordance with the user's operation, separates the steering clutch shaft pinion 22 from the steering clutch shaft pinion 22, The power transmitted to the steering clutch shaft pinion 22 from the steering clutch shaft 21 can be cut off. The steering clutch portion A2 according to another embodiment applies a force to the steering clutch shaft pinion 22 in accordance with the user's operation and separates the steering clutch shaft pinion 22 and the final drive shaft gear 31 of the final driving portion So that the power transmitted from the steering clutch shaft pinion 22 to the final driving portion can be cut off. The power thus intercepted can be normally transmitted to the steering clutch shaft pinion 22 in the original position by the spring provided on the steering clutch shaft 20.

The final driving portion B of the safety steering device can receive power from the steering portion A. [ The final driving unit B can transmit the transmitted power to the wheels through the internal gear train of the final driving unit B. [ The final drive unit B at this time may include a final drive shaft, a final drive shaft gear 31, a differential gear unit, and a differential lock dog sleeve 41. The final drive shaft gear 31 of the final drive section B may be formed such that the center of the final drive shaft gear 41 and the differential drive gear sleeve 41 penetrate through the outer case, 20).

The final drive shaft may be separated from the left final drive shaft 30 and the right final drive shaft 40 and may be splined to the differential side gear 53 of the differential gear unit. The left final drive shaft 30 can be coupled to the final drive shaft gear 31 so that one side of the left final drive shaft 30 is connected to the differential gear device and the other side is connected to the left axle pinion, . The right final drive shaft 40 may be coupled to the spring and differential lock dog sleeve 41 so that one end of the right final drive shaft 40 is connected to the differential gear unit and the other end is connected to the right axle pinion, The power can be transmitted to the wheel. At this time, the right final drive shaft 40 and the differential lock dog sleeve 41 can be engaged with and fixed to the right final drive shaft 40 and the differential lock dog sleeve 41 through spline coupling, have.

The final driving shaft gear 31 is provided so that the center of the rotating body passes through the left final driving shaft 30 and the gear of the final driving shaft gear 31 is engaged with the gear of the steering clutch shaft pinion 22 of the steering clutch portion A2 To be combined. In another embodiment, the final drive shaft gear 31 may be installed such that the center of the rotor is passed through the differential side gear 53 splined to the left final drive shaft 30. [

The final drive shaft gear 31 can receive power from the steering clutch shaft pinion 22 through the engagement of the steering clutch shaft pinion 22 and the gear. The final drive shaft gear 31 can be prevented from separating from the designated position through the C-type stop ring.

On the other hand, the final drive shaft gear 31 may be connected to the differential side gear 53, which is a differential gear train, through a sliding bearing. The power received by the final drive shaft gear 31 can not be transmitted to the differential side gear 53 due to the idling generated by the sliding bearing between the final drive shaft gear 31 and the differential side gear 53, The power can not be transmitted to the left final drive shaft 30 splined to the side gear 53.

The differential gear device is coupled to one side of the rotating shaft of the final driving shaft gear 31 so that the differential gear device can receive power from the final driving shaft gear 31 while rotating together with the rotating body, The power can be transmitted to the left final drive shaft 30 and the right final drive shaft 40 through the internal gear train of the differential gear unit. At this time, the differential gear device can control the rotation speed of the left final drive shaft or the right final drive shaft differently according to the load applied when the load is applied to the left final drive shaft 30 or the right final drive shaft 40. The differential gear device may include a differential gear unit case 51, a differential pinion shaft 52, a differential pinion 54, and a differential side gear 53 for the above control.

The differential gear unit case 51 is rotatably mounted on the final drive shaft gear 31. The differential gear unit case 51 is fixed to the rotation shaft of the final drive shaft gear 31 by a knock pin and a bolt, The power of the vehicle can be transmitted. The differential gear unit case 51 can be coupled to the differential pinion shaft 52 so as to pass through the differential pinion shaft 52 and can transmit power to the differential pinion shaft 52. The differential gear unit case 51 may be configured to surround the differential pinion 54 and the differential side gear 53.

The differential pinion shaft 52 is parallel to the rotating body of the final drive shaft gear 31 and can be installed to pass through the differential gear unit case 51. The differential pinion shaft 52 installed in this manner is fixed to the differential gear unit case 51 and rotates as the differential gear unit case 51 rotates to receive the power from the differential gear unit case 51, The differential pinion shaft 52 can transmit the transmitted power to the differential pinion 54. The differential pinion shaft 52 may be provided so as to pass through the center of the rotation of the differential pinion 54.

The differential pinion 54 can be positioned so that the rotating body passes through the differential pinion shaft 52 within the differential gear unit case 51 and is disposed opposite the differential pinion shaft 52 at opposite ends thereof, Two of which may be formed. The two differential pinions 54 can be coupled to the two differential side gears 53 in the form of a right angle, that is, in the form of a bevel gear. The differential pinion 54 can transmit the power received from the differential pinion shaft 52 to the differential side gear 53. More specifically, the differential pinion 54 is fixed to the differential pinion shaft 52 and receives power from the differential pinion shaft 52 while rotating in the same manner. At this time, the differential pinion 54 is driven by the differential side The power can be transmitted to the differential side gear 53 while the gear 53 rotates together.

Two differential side gears 53 can be formed so as to be parallel to each other and two differential side gears 53 can be combined with two differential pinions 54 in the form of a bevel gear. The rotating bodies of the two differential side gears 53 may be connected to the left final drive shaft 30 and the right final drive shaft 40, respectively. Accordingly, the differential side gear 53 can transmit the power received from the differential pinion 54 to the left final driving shaft 30 or the right final driving shaft 40.

The differential lock dog sleeve 41 is provided so that the center of the side disc is inserted into the right final drive shaft 40 and the outer groove of the differential lock dog sleeve 41 is engaged with the differential lock control gear of the negative speed change portion A1 Can be located. The differential lock dog sleeve 41 can be moved in the direction parallel to the axis at the right final drive shaft 40 and can be coupled to the differential gear unit case 51 according to the user's operation. At this time, grooves or teeth may be formed on the differential lock dog sleeve 41 and the differential gear device case 51 so as to be engaged with and fixed to each other. The differential lock dog sleeve 41 is splined to the right final drive shaft 40 and can rotate identically. The differential lock dog sleeve 41 can be controlled according to the operation of the steering clutch fork.

On the other hand, the differential gear device can control the rotational speeds of the left final drive shaft 30 or the right final drive shaft 40 differently depending on the load applied to the left final drive shaft 30 or the right final drive shaft 40, Depending on the user's manipulation, the differential gear unit can be locked for linearity. This will be described with reference to Figs. 6 to 7. Fig.

FIG. 6A is a plan view showing a configuration when the differential lock dog sleeve according to the embodiment of the present invention is released, FIG. 6B is a plan view showing a configuration when the differential lock dog sleeve according to the embodiment of the present invention is engaged, to be. FIG. 7A is a conceptual view showing the flow of gears of the differential gear device when going straight, according to an embodiment of the present invention, and FIG. 7B is a conceptual view showing the gears of the differential gear device at the time of right turning according to an embodiment of the present invention FIG.

6A and 6B, the differential gear device of FIG. 6A in which the differential gear device case 51 of the differential gear device case 51 of the differential gear device of FIG. 6A is rotated in the differential gear device case 51 when the differential gear device case 51 rotates as the final drive shaft gear 31 rotates, The differential pinion shaft 52 fixed to the differential pinion shaft 52 rotates and the differential pinion 54 provided on the differential pinion shaft 52 can revolve in the same direction as the direction in which the differential pinion shaft 52 rotates. At this time, since the rotational speed of the left final drive shaft 30 is the same as the rotational speed of the right final drive shaft 40, the rotational speeds of the two differential side gears 53 are the same, so that the differential pinion 54 does not rotate.

In the case of Fig. 6B, which is turning to the right, the right wheel is subjected to a load while the right gear is being rotated. Therefore, the rotational speed of the right final drive shaft 40 becomes slower than that of the straight gear. At this time, due to the difference between the rotational speed of the right final drive shaft 40 and the rotational speed of the left final drive shaft 30, the rotational speeds of the right and left differential side gears 53 are changed, . The differential pinion 54 that rotates transmits the reduced rotational force from the right differential side gear 53 to the left differential side gear 53 and the rotation of the left final drive shaft 30 connected to the left side gear 53 The speed becomes the speed at which the rotational speed of the right final drive shaft 40 is reduced by the reduced speed.

On the other hand, cultivators that have to work a lot of agricultural land should be forced to go straight according to the situation, which can be solved by differential lock.

Referring to FIG. 7A, when the differential lock device is released, the differential lock dog sleeve 41 is spaced from the differential gear device case 51. In this case, the differential gear device is normally operated, and the left final drive shaft 30 and the right final drive shaft 40 may have different rotational speeds depending on the load.

Referring to Fig. 7B, when the differential lock device is in operation, the differential lock dog sleeve 41 is coupled to the differential gear device case 51. Fig. In this case, the differential lock dog sleeve 41 rotates in the same manner as the differential gear unit case 51, and the right final drive shaft 40 fixed to the differential lock dog sleeve 41 is rotated in the same manner as the final drive shaft gear 31, So that the rotation is performed. The left final drive shaft 30 and the right final drive shaft 40 are fixed by the differential pinion 54 and the differential lock dog sleeve 41 to become one shaft and the left final drive shaft 30 Even if a load is applied to the right final drive shaft 40, the rotational speeds of the left final drive shaft 30 and the right final drive shaft 40 become the same.

30: Left final drive shaft
31: Final drive shaft gear
40: right final drive shaft
41: Differential lock dog sleeve
51: Differential gear unit case
52: Differential pinion shaft
53: Differential side gear
54: Differential pinion

Claims (5)

A final drive shaft gear for receiving power from the outside;
A left final driving shaft and a right final driving shaft which are formed in a direction perpendicular to the rotating body of the final driving shaft gear and rotate with respect to the center shaft when receiving power;
The final drive shaft gear and the left final drive shaft and the right final drive shaft to connect the final drive shaft gear to transmit the power received from the outside to the left final drive shaft and the right final drive shaft, A differential gear device for controlling the rotation speed of the left final driving shaft or the right final driving shaft differently according to a load applied thereto; And
When the user performs an operation for locking the differential gear device so that the left final drive shaft and the right final drive shaft simultaneously rotate, a differential lock dog sleeve for fixing the differential gear device such that the left final drive shaft and the right final drive shaft simultaneously rotate Safety steering included. The method according to claim 1,
The differential gear device includes:
A differential gear unit case coupled to the disc rotor of the final drive shaft gear and rotating together therewith;
A differential pinion shaft that is parallel to the final drive shaft gear and is formed to penetrate the differential gear unit case and rotates together with the differential gear unit case to transmit power;
A differential pinion formed at both ends of the differential pinion shaft such that a circular rotary plate passes through the differential pinion shaft in the differential gear unit case;
A left differential side gear formed so that teeth of the gear are perpendicular to the differential pinion and a center portion of the gear is spline coupled with the left final drive shaft to transmit the power of the differential pinion to the left final drive shaft; And
And a right differential side gear which is formed so that a tooth of the gear is perpendicular to the differential pinion and a center portion of the gear is spline coupled with the right final drive shaft to transmit the power of the differential pinion to the right final drive shaft. 3. The method of claim 2,
The differential pinion includes:
If the load is not applied to the left final drive shaft or the right final drive shaft,
Wherein when the load is applied to the left final drive shaft or the right final drive shaft, revolution of the differential pinion shaft and rotation of the differential pinion itself occur at the same time. 3. The method of claim 2,
The differential pinion includes:
If the load is not applied to the left final drive shaft or the right final drive shaft,
Wherein when the load is applied to the left final drive shaft or the right final drive shaft, revolution of the differential pinion shaft and rotation of the differential pinion itself occur at the same time. 3. The method of claim 2,
The differential side gear
Wherein a sliding bearing is formed through the center of the rotating body of the final driving shaft gear to prevent power from being directly transmitted to a contact surface between the final driving shaft gear and the differential side gear.
KR1020150116776A 2015-08-19 2015-08-19 Safty steering system KR20170022150A (en)

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