JP2000312506A - Steering structure of sulky type working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steering structure of a sulky type working machine, having the steering structure hardly putting a person to inconvenience for getting on and off. SOLUTION: This steering structure has a traveling lever 3 stood on an operating table 5A of a sulky type car body 5, and having a steering handle 8 swingable in the horizontal face, a steering lever 9 installed in the longitudinal direction of the traveling lever 3 and at the vicinity of the steering handle 8, and swingable in the same direction as the steering handle 8, a steering- transmitting means arranged between the steering lever 9 and a hydraulic lamp 4 arranged in the sulky type car body and feeding oil to a hydraulic motor. The steering transmitting means has transmission pathways 10, 11, 12 sent out from the steering lever 9 to the front side of the sulky type car body 5, turning downward from the front side of the sulky type car body 5, and turning back to a flow controlling part possessed by the hydraulic pump 4 in a creeping state over the vicinity of the operating table 5A in nearly parallel to the sent out direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering mechanism for a riding type working machine, and more particularly to a steering mechanism for a riding type working machine having a pair of right and left traveling devices for switching the driving state of each traveling device. Operating mechanism.

[0002]

2. Description of the Related Art A riding-type working machine for a tea garden, which is one of the riding-type working machines, has a control device for spraying a control solution onto a tea plant. The pest control machine is mounted on a waist-high passenger car body that runs across the ridges on both sides of the ridge by a pair of left and right crawler traveling devices.
2. Description of the Related Art There is generally known a configuration equipped with a control device having a pair of left and right chemical liquid tanks and an upside-down nozzle pipe capable of spraying a chemical liquid on three rows of tea ridges including left and right tea ridges.

[0003] The pair of left and right crawler traveling devices are driven by a hydraulic motor which is operated by supplying hydraulic oil from a hydraulic pump driven by an engine. Control and move forward, backward,
Stopping and steering for changing the traveling direction are performed. For setting such a driving state, a traveling lever provided on a driver's seat on the upper surface of the passenger vehicle body is used.

Conventionally, as a configuration of a traveling lever, as disclosed in Japanese Patent Application Laid-Open No. Hei 8-242743, filed by the present applicant, rotation control of a hydraulic motor mounted on a pair of right and left crawler devices is disclosed. There is a configuration in which a pair of levers are provided so as to perform the operations individually and simultaneously. On the other hand, in place of the traveling lever, a configuration in which the traveling levers are collectively provided with a lever capable of swinging in a horizontal plane and an operation rod provided at the upper end with a central position of the lever capable of swinging forward and backward in a vertical plane is provided. There is. FIG. 5 is a perspective view showing the latter configuration. In FIG. 5, a hinge connection portion A is provided on the cab, and the hinge connection portion A can swing back and forth in a vertical plane. A rod member to which an operation rod B is attached, and which protrudes horizontally in the middle of the operation rod B in the longitudinal direction, and is stretched between the operation rod B and a flow control unit of a hydraulic pump disposed at the rear of the cab. A steering lever D is provided in which C and C are connected to respective ends in the horizontal direction. The steering lever D is
An upper end corresponding to one longitudinal end of the operation rod B is interlocked with a steering handle E provided to be swingable in a horizontal plane. The steering lever D having such a configuration can pull one of the rod members C, C according to the direction in which the steering handle lever E is swung in a horizontal plane. When one of the rod members C, C is towed,
By changing the opening between the flow control units of the hydraulic pumps to which the ends of the rod members C, C are connected, the amount of oil supplied from the hydraulic pumps is changed between the hydraulic motors, so that Can be changed, and so-called steering can be performed. The operating rod B uses rod members C, C provided on the steering lever D as a part for performing forward and backward movement and speed control in accordance with the swing direction on the vertical plane.

[0005]

However, in the case of the above configuration, there is a possibility that the getting on and off of the worker may be inconvenient. That is, when the flow control unit of the hydraulic pump is arranged at the rear of the cab, the rod members C, C connected to the steering lever D are extended toward the flow control unit. On the other hand, in order to improve the responsiveness at the time of forward / backward switching and speed control of the riding work machine using the swinging motion of the operating rod B, a rod member C used for these forward / backward / speed control, It is desirable to increase the swing amount of the steering lever D to which C is connected. For this reason, the position of the steering lever D is preferably located above the upper surface of the cab. However, when the rod members C, C extending from the upper surface of the cab upward to the rear of the cab are present, the seat on which the worker sits is located near the arrangement height of the steering lever D. In this case, the rod members C may be located around the knees of the worker sitting on the seat. Therefore, the rod member C,
If C is at a position raised from the upper surface of the cab, not only does it hinder the operator from getting on and off, but also has to straddle the rod members C, C, which makes the getting on and off operation inconvenient.

SUMMARY OF THE INVENTION An object of the present invention is to provide a steering mechanism capable of preventing the inconvenience of getting on and off in view of the above-mentioned problems in the conventional steering mechanism of a riding type working machine, particularly, problems when the operator gets on and off. An object of the present invention is to provide a steering mechanism for a riding type work machine provided with the steering mechanism.

[0007]

In order to achieve this object, an invention according to claim 1 is a passenger vehicle which runs over a tea ridge by a traveling device having a pair of left and right hydraulic motors and runs between ridges on both sides thereof. In the steering mechanism of the riding type working machine used when steering by making the driving postures different between the respective traveling devices, the steering mechanism is provided substantially upright on the cab of the riding body, and in a horizontal plane. A traveling lever having a swingable steering handle, a steering lever provided near the steering handle in a longitudinal direction of the travel lever, and capable of swinging in the same direction as the steering handle; the steering lever and the riding body A steering transmission unit disposed between the steering lever and the hydraulic pump that sends oil to the hydraulic motor.The steering transmission unit is extended forward from the steering lever toward the front of the passenger vehicle body. After being folded downward from the front of the passenger car body, the passenger car was folded back near the cab of the passenger car body toward the flow control unit of the hydraulic pump substantially in parallel with the payout direction. It is characterized by having a transmission path.

According to a second aspect of the present invention, a transmission lever is provided at a front portion of the cab of the riding body, the transmission lever having one of swing ends located near the cab surface and capable of swinging in a vertical plane. A traveling device-side traction member is provided between one of the swing ends and the flow control unit of the hydraulic pump, and the other of the swing ends of the transmission lever A steering lever-side traction member is provided between the steering lever and the steering lever. When the steering lever swings, the transmission lever swings via the steering lever-side traction member. The operation of the flow control unit between the hydraulic pumps may be made different between the hydraulic pumps by interlocking the traveling device-side traction members.

[0009]

According to the first and second aspects of the present invention, the steering transmission means disposed between the steering lever and the flow control unit of the hydraulic pump is extended from the steering lever to the front of the passenger vehicle, and from the front of the passenger vehicle. After being folded downward, a transmission path that is substantially parallel to the payout direction is set toward the flow control unit included in the hydraulic pump in a state in which the vicinity of the cab is crawled, and particularly, from the front of the passenger body. Since the downward turning is achieved by the transmission lever having one of the swing ends located on the cab surface,
The traction member used for the transmission path can be arranged on the cab surface below the driver's seat. As a result, since there is no traction member around the knee of the worker sitting in the driver's seat, the traction member does not become an obstacle when the worker gets on and off.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a side sectional view showing a driver's cab of a riding type working machine in a side view. In the figure, a driver's seat 1 on which a worker sits, an operation panel 2, A lever 3 is provided. As the riding type working machine,
The control device corresponds to the control device described above, and although not shown in detail, as described above, the hydraulic pump provided with the crawler device used as the pair of left and right traveling devices is provided with a hydraulic pump (reference numeral 4 in FIG. 1). (A member shown) is provided. As will be described in detail later, the hydraulic pump 4 can control the amount of oil supplied by the hydraulic pump 4 by adjusting the opening through a traction member. Although not shown, the operation panel of the operation panel 2 is provided with instruments necessary for operation control of the traveling device, an engine start switch for driving a hydraulic pump, a throttle lever, and the like.

The traveling lever 3 is provided upright on the upper surface of the driver's cab 5A of the passenger car body 5 on which the seat 1 is installed. -Shaped base lever 3A
And a swing lever portion 3B made of a rod member extended to a height at which a worker sitting on the driver's seat 1 can reach. On the upper surface of the driver's cab 5A, a hinge coupling bracket 6 is provided corresponding to the installation position of the traveling lever 3, and the hinge coupling bracket 6 is provided.
A base lever 3A is pivotally supported with respect to the base body 3 and the base lever 3A is swingably supported in the vertical direction in the front-rear direction of the vehicle body 5. In FIG. 1, the swing lever portion 3B
The end is inserted into the base lever portion 3A at the division position, and the distal end of the screw member 7 inserted from the base lever portion 3A side enters the concave portion 3B1 formed on the peripheral surface of the end portion. It is stopped and swingably supported in a horizontal plane. At the upper end of the swing lever portion 3B, FIG.
As shown in FIG. 5, a lever-shaped steering handle 8 is integrated, and a steering lever 9 having a longitudinal direction parallel to the same direction as the steering handle 8 is integrated below the steering handle 8, and both are interlocked. It has become.

In FIGS. 1 and 2, the steering lever 9 is provided with steering transmission means at both ends in the longitudinal direction. The steering transmission means is a steering force transmission means for changing the traveling direction of the riding type work machine in accordance with the swing direction of the steering handle 8, and in the present embodiment, the hydraulic pressure of the pair of left and right crawler devices is adjusted. The flow rate is controlled from a hydraulic pump (a member denoted by reference numeral 4 in FIG. 1) that controls the supply of the pressure oil to the motor. That is, the steering wheel 8
According to the direction of steering, oil is supplied to the hydraulic motor corresponding to the outside of the turn, and oil supply to the hydraulic motor corresponding to the inside of the turn is stopped to enable rapid turning in the non-running state. Or adjusting the required oil amount in each hydraulic motor according to the turning angle.

The steering transmission means includes a transmission lever 10 which can swing on a vertical plane, and a first traction member 11 and a second traction member 12 which are connected to each end of the oscillating end of the transmission lever. And are provided. The transmission lever 10 is pivotally supported at a central portion in the longitudinal direction by a support bracket 13 installed on an inner wall of the operation panel 2 located in front of the seat 1 in the passenger car body 5, and one of the swing ends is near the cab 5A. And the first traction member 11 extends to the end opposite to the driver's cab 5A side and the steering lever 9 across the swing center of the transmission lever 10. The second pulling member 12 is connected to one of the swinging ends of the transmission lever 10 located on the driver's cab 5A side and the flow control operation unit of the hydraulic pump 4. The rod members are connected at their respective ends in the extending direction and are parallel to the first traction member 11.

The steering lever 9 of the first traction member 11
The end on the side of the transmission lever 10 is connected via a universal joint 14 attached to the steering lever 9, and the end on the side of the transmission lever 10 is connected via a relay member 15 pivotally supported on the transmission lever 10. ing. The second traction member 12 is a hydraulic pump 4 located at a lower rear portion of the driver's seat 1 in a state in which the second traction member 12 crawls near the cab 5A from one of the swing ends of the transmission lever 10.
It is extended toward the side. For this reason, the steering force of the steering lever 9 is transmitted to the transmission lever 10 from the first traction member 11 extending toward the front side of the passenger vehicle, and the cab of the passenger vehicle 5 is oscillated by the transmission lever 10. It is transmitted to one of the swing ends located near 5A, and is transmitted to a second traction member 12 connected to one of the swing ends and parallel to the first traction member 11 near the driver's cab 5A.

Since the present embodiment is configured as described above,
When the steering wheel 8 is steered by the operator, the flow rate of the hydraulic pump 4 provided corresponding to the crawler device located on the left and right according to the steering direction is controlled, and the rotation of the hydraulic motor is controlled. At this time, the swing of the steering lever 9 is
The power is transmitted via the transmission lever 10 to the second traction member 12 located near the cab 5A of the passenger vehicle body 5. Therefore, the second traction member 12 connected to the flow control operation unit on the hydraulic pump 4 side is located near the surface of the driver's cab 5A, which is under the operator's feet, so that when the operator gets on and off, Does not get in the way and does not force the operator to move over the transmission means.

In the above embodiment, it is possible to adjust the amount of traction of the second traction member 12 with respect to the amount of swing of the steering lever 9 only by changing the length from the swing fulcrum to the swing end of the transmission lever 10. And responsiveness can be optimized.

The traveling lever 3 shown in the above embodiment is provided with a structure for setting not only the steering but also the forward, backward and stop positions and the speed of the hydraulic motor during forward and backward movement. I have. That is, in the swinging lever portion 3B, which is a member of the traveling lever 3, in the vicinity of the position where the first traction member 11 is connected, the extension direction of the arc-shaped member 16 extended forward of the passenger vehicle body 5. One end is fixed, and the arc-shaped member 16 can swing in a vertical plane in conjunction with the traveling lever 3. As shown in FIG. 3, triangular teeth 16 </ b> A formed along the extension direction are continuously provided on the upper surface of the arc-shaped member 16. An engaging member 17 made of an elastic body and fixed to the two sides is engaged to form a latch mechanism. As shown in FIG. 1, the traveling lever 3 is in a neutral position when it is upright with respect to the cab 5A, and when it swings forward based on this position, it is a riding type working machine. Can be set as a forward movement state, and a backward movement state of the riding type work machine can be set when swinging rearward. In the forward and backward states, the rotation directions of the hydraulic motors are set in opposite directions.

A notch 16B cut from the lower edge is formed at the lower surface of the arc-shaped member 16 at the middle portion in the extension direction. The position where the notch 16B is formed is an intermediate portion in the extending direction of the arc-shaped member 16 when the traveling lever 3 is in a neutral position in which the traveling lever 3 stands upright with respect to the cab 5A.

When in the neutral position, the travel lever 3
Is held in its position by a locking member 18 described later. That is, the locking member 18 is configured by a vertically movable plate member provided so as to be able to engage and disengage with the notch 16B of the arc-shaped member 16, and the upper end portion is capable of moving forward and backward with respect to the notch 16B. Further, as shown in FIG. 4, the lower end is connected to the swing end of a pedal 19 which is provided to be able to swing vertically in the cab 5A. The pedal 19 has a base end pivotally supported on the upper surface of the driver's cab 5A and is swingably supported, and the swing end is generally lifted by an elastic body such as a spring (not shown) as shown by a solid line in FIG. Habits are given.
For this reason, the locking member 18 connected to the swinging end has a habit of allowing the upper end to enter the notch 16B of the arc-shaped member 16, and when the traveling lever 3 stands upright with respect to the cab 5A. Into the notch 16B of the arc-shaped member 16 to hold the traveling lever 3 at the neutral position. On the other hand, when the pedal 19 is depressed against the bias of the spring, the swing end swings toward the floor 5A above the floor as shown by a two-dot chain line in FIG. Notch 16B
Moved away from For this reason, the locking member 1
When the locking of the arc-shaped member 16 by the lock member 8 is released, the traveling lever 3 can swing in a vertical plane, so that the traveling device moves forward and backward in accordance with the swing direction and the swing amount. , Speed are set respectively. When the traveling lever 3 swings, the first traction member 11 moves in accordance with the swing amount, so that the transmission lever 10 also swings in accordance with the movement, and the second pulling member 11 swings accordingly.
Is set, the amount of pressure oil supplied by the hydraulic pump 4 is adjusted. Accordingly, the rotation direction of the hydraulic motor is set in accordance with the swing direction of the travel lever 3, and the hydraulic motor can rotate under the flow control of the hydraulic pump 4 in accordance with the swing amount of the travel lever 3.

In such a configuration, the traveling lever 3
Since the neutral position is held by the locking member 18, it can be used as a safety mechanism for preventing the traveling device from being activated when the traveling lever 3 is carelessly touched.
That is, the traveling direction and speed of the traveling device can be set only after the pedal 19 is operated. Further, utilizing the fact that the traveling lever 3 can be held at such a neutral position, for example, when the traveling lever 3 is at the neutral position is detected by a sensor (not shown), and the traveling lever 3 is detected by a signal from this sensor.
May be provided so that the engine can be started only when the engine is in the neutral position. Furthermore, the traveling lever 3
The steering handle 8 can be operated even when the steering wheel 8 is in the neutral position. For example, the oil flow control to the left and right hydraulic motors with the travel lever 3 set to the neutral position is used. Of course, it is also possible to make a sharp turn with the traveling device stopped. In the above embodiment, the crawler device has been described as a target of the traveling device.
In the present invention, the present invention is not limited to this, and an endless belt device using a caterpillar can be used, and a driving source is not limited to a hydraulic motor but may be an electric motor. Further, the traveling device is not limited to the crawler device, but may be a traveling device using wheels or tracks. Further, the traction member is not limited to the rod member described above, and a wire having a property different in rigidity between the extension direction and the contraction direction may be used. It is also possible to make it harder to be caught on the foot and not to impair the appearance.

[0021]

According to the first and second aspects of the present invention,
After the steering transmission means disposed between the steering lever and the flow control unit included in the hydraulic pump is fed out of the steering lever toward the front of the passenger car body and is turned downward from the front of the passenger car body, the vicinity of the driver's cab is returned. A transmission path substantially parallel to the feed-out direction is set toward the flow control unit of the hydraulic pump in a state in which the hydraulic pump is crawled, and in particular, it is turned downward from the front of the passenger car body toward the driver's cab surface. Since this is achieved by the transmission lever on which one of the swing ends is located, the traction member used for the transmission path can be arranged on the cab surface below the driver's seat. As a result, there is no traction member around the knee of the worker sitting in the driver's seat, so that the traction member does not become an obstacle when the operator gets on and off, so it is possible to reduce inconvenience when getting on and off become.

[Brief description of the drawings]

FIG. 1 is a side sectional view for explaining a driver's seat of a riding type working machine used in a similar manner to the first and second embodiments of the present invention.

FIG. 2 is a partial perspective view for explaining a configuration of a traveling lever used for a driver seat shown in FIG.

FIG. 3 is a view showing a part of an arc-shaped member which is a position setting member of a traveling lever used in the embodiment shown in FIG. 1;

FIG. 4 is a view for explaining a configuration of a locking member used for a driver seat shown in FIG. 1;

FIG. 5 is a perspective view for explaining a conventional example of a steering mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat 2 Operation panel 3 Traveling lever 3A Traveling lever base lever 3B Traveling lever swinging lever 4 Hydraulic pump 5 Passenger car body 5A Driver's cab 6 Traveling lever hinge coupling bracket 7 Screw entering recessed portion of swinging lever 8 Steering handle 9 Steering lever 10 Transmission lever

Claims (2)

[Claims] 1. A traveling device having a pair of left and right hydraulic motors is provided on a passenger vehicle body that runs over a tea ridge and runs between ridges on both sides of the tea ridge. A steering mechanism of a riding-type working machine used when the vehicle is driven, the traveling lever having a steering handle provided substantially upright on a cab of the riding vehicle body and swingable in a horizontal plane, and a longitudinal direction of the traveling lever. A steering lever provided near the steering wheel, and capable of swinging in the same direction as the steering handle, between the steering lever and a hydraulic pump installed on the passenger body and supplying oil to the hydraulic motor. And a steering transmission means disposed.The steering transmission means is extended from the steering lever toward the front of the passenger vehicle body, and is turned downward from the front side of the passenger vehicle body. Steering mechanism of riding working machine in a state where the crawl cab vicinity of the vehicle body toward the flow control unit having the above hydraulic pump and having a transmission path which is folded by parallel the feed direction substantially. 2. A transmission lever, which has one of its swinging ends located near the cab surface and is capable of swinging in a vertical plane, is provided at both ends in the horizontal direction of the steering lever. A traveling device-side traction member is provided between one of the swing ends and the flow control unit of the hydraulic pump, and the other of the swing ends of the transmission lever is connected to the steering lever. A steering lever-side traction member is provided therebetween, and when the steering lever swings, the transmission lever swings via the steering lever-side traction member. The swing of the transmission lever causes the traveling device-side traction member to swing. The steering mechanism for a riding work machine according to claim 1, wherein the operation of the flow control unit between the hydraulic pumps is made different by interlocking the hydraulic pumps.