JPH0591205U - Support device for control lever in tractor - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a control lever support device for a tractor that can easily and accurately rotate the control lever at an appropriate position regardless of the position movement of the driver's seat due to front-back adjustment. . [Structure] A seat bracket 11 is attached to the lower surface of the front portion of the driver's seat 6 so that the front and rear can be adjusted, and a support bracket 13 pivotally supporting a control lever 9 is integrally fixed to the seat bracket 11. At the same time, the main body of the control valve unit 8 was mounted on the side of the machine body 1 below the driver's seat 6, and the main body and the control lever 9 were connected via the variable length joint 14.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a control lever supporting device provided on the lower surface of the front part of the driver's seat, and in particular, regardless of the position movement of the driver's seat due to front-rear adjustment, the control lever can always be easily and accurately rotated at an appropriate position. The present invention relates to a control lever supporting device in a tractor that can be used for various purposes.

[0002]

[Prior Art]

 Generally, in a tractor equipped with a three-point link mechanism, a position control unit and a draft control unit are used to control the hydraulic control valve unit for hydraulic control to position the work machine at an arbitrary height by operating the position lever. The top link bracket detects the traction resistance of the vehicle and controls the drive such as keeping the traction load below a certain value. The three-point link mechanism is then driven up and down via a hydraulic cylinder. The control valve unit is equipped with a pressure oil flow control unit that adjusts the descending speed of the working machine according to the type of working machine to be mounted, the hardness of the field, etc., together with the control units. The control lever that opens and closes the flow control section is fixed to the underside of the driver's seat through a support bracket.

However, in the prior art, when the operator moves the driver's seat forward in order to obtain the best driving posture suitable for himself, the operation position of the control lever is relatively to the rear side below the driver's seat. If you tilt the driver's seat forward when checking or maintaining the hydraulic control mechanism, etc. below the driver's seat, it will not be possible to operate the control lever. It had the drawback of causing interference.

[0004]

[Problems to be Solved by the Invention] In view of the above-mentioned circumstances, the present invention was devised to eliminate the conventional drawbacks, and its purpose is to adjust the front and rear movement of the driver's seat. Regardless, always provide the control lever support device in the tractor that allows the control lever to be operated always on the lower surface of the front part of the driver's seat so that the control lever can be easily operated while maintaining the driving posture. Is to

[0005]

[Means for Solving the Problems]

 In order to solve the problem, the technical means adopted by the present invention is that a support bracket, which has a front and rear adjustable seat bracket attached to the lower surface of the front part of the driver's seat, and a control lever is pivotally supported, In addition to being integrally fixed to the seat bracket, the main body of the control valve unit is mounted on the machine body side below the driver's seat, and the main body and the control lever are connected via a variable length joint. Is.

[0006]

[Action]

 Therefore, according to the present invention, even if the position of the driver's seat is adjusted forward, the control lever is always located on the lower surface of the front part of the driver's seat, so that the operation of the control lever can be performed easily and accurately. .

[0007]

【Example】

 The configuration of the present invention will be described in detail based on an embodiment shown in the drawings. In FIG. 1, reference numeral 1 is a tractor body, 2 is a body frame, 3 and 4 are front and rear wheels pivotally supported in front of and behind the body frame 2, and 5 is a driving operation in which a driver's seat 6 is arranged rearward. A lift arm 7 for connecting a lift rod of a three-point link mechanism (not shown) is pivotally supported at the rear of the machine body 1 so as to be vertically rotatable, and below the driver's seat 6 is a machine body. A control valve unit 8 arranged on the first side and a control lever 9 described later are arranged.

As shown in FIGS. 2 (a), 2 (b) and 3, the driver's seat 6 has support legs 6a, 6a mounted on the lower surface of the front part thereof, which are attached to the base portion of the fuselage 1 side by bolts 10 and 10. The seat bracket 11 fixed on the shaft 1a is pivotally supported via a pivot pin 12, and is pivotally supported when the control valve unit 8 and other hydraulic control mechanisms are inspected and maintained. It is configured to be able to fall forward around the pin 12 as the center of rotation. Further, a support bracket 13 fitted with a turning knob 9a of a control lever 9 is integrally fixed to a front end portion 11a of the seat bracket 11, and the turning knob 9a is connected via a variable length joint 14 to It is connected to the valve shaft 8a of the control valve unit 8.

The variable-length joint 14 is formed by connecting a main body 14a on the valve shaft 8a side and a main body 14b on the turning knob 9a side via a joint portion 15, and in the main body 14b described above. A prismatic telescopic rod 16 is slidably mounted inside, and the rotation knob 9a is attached to the projecting end of the rod to form a support device 17 for the control lever 9. In addition, reference numeral 18 is a mounting hole for the bolts 10 and 10 which are formed in the seat bracket 11 with a mounting interval L therebetween.

In the above-mentioned configuration, when adjusting the descending speed of the working machine attached to the three-point link mechanism (not shown) during work in the field by the machine body 1, the worker remains seated in the driver's seat 6. When the rotation knob 9a is rotated in the left-right direction in this posture, the rotation of the rotation knob 9a is performed through the telescopic rod 16, the main bodies 14b, 14a and the joint portion 15 of the valve shaft 8a of the control valve unit 7. And the hydraulic control is performed by the control valve unit 7, so that the descending speed of the working machine can be adjusted to be slow for the rotary working machine and fast for the plow working machine, for example.

In addition to the adjustment operation of the control valve unit 7 by the control lever 9 as described above, when adjusting the front-back position of the driver's seat 6, first, the bolts 10 and 10 are removed and the driver's seat 6 is moved forward by the bolt 10. The mounting hole 18 of the seat bracket 11 which has moved by the mounting distance L of 10, and which has moved with the forward movement of the driver's seat 6 is aligned with the mounting hole (not shown) on the side of the base portion 1a, and the bolt 10 is used again. The seat bracket 11 may be fixed to the base portion 1a. At this time, with the forward movement of the seat bracket 11, the support bracket 13 fixed to the front end portion 11a of the seat bracket 11 is displaced forward, and the expansion rod 16 is extended by the attachment interval L. Therefore, the control lever 9 The positional relationship between the rotation knob 9a and the driver's seat 6 does not change, and therefore the rotation knob 9a can always be operated at a fixed position without being affected by the position movement of the driver's seat 6.

In this embodiment, the front and rear position of the driver's seat 6 is adjusted by selecting only the mounting distance L between the bolts 10 and 10 of the seat bracket 11, but the present invention is not limited to this. Alternatively, the mounting holes 18 of the bolts 10 and 10 may be formed as long holes so as to be capable of stepless adjustment between the mounting intervals L. In this case as well, the rotation knob 9a and the driving knob 9a are operated similarly to the present embodiment. The positional relationship between the seats 6 can be kept constant, and the operability of the control lever 9 can be improved.

[0013]

[Effect of the device]

 In short, according to the present invention, the seat bracket, which is adjustable in the front-rear direction, is attached to the lower surface of the front part of the driver's seat, and the support bracket rotatably supporting the control lever is integrally fixed to the seat bracket. At the same time, the main body of the control valve unit was attached to the machine side below the driver's seat, and the main body and the control lever were connected via the variable length joint, so regardless of adjustment of the front-back movement of the driver's seat, control was always performed. By positioning the lever operation position on the lower surface of the front part of the driver's seat, the control lever can be easily operated while maintaining the driving posture, and the burden on the operator associated with operating the work machine can be reduced. Even when the driver's seat is laid down forward, the driver's seat does not interfere with the control lever, and the hydraulic control mechanism below the driver's seat is inspected and maintained. It can be easily and reliably, but exert a very useful practical effect.

[0014]

[Brief description of drawings]

1 is a partial cutaway side view of a tractor of the present invention.

FIG. 2A is an enlarged side view of a main part. (B) is an operation explanatory view of the main part of the same showing a state where the driver's seat is moved forward.

FIG. 3 is a cross-sectional view taken along the line AA showing a state where the telescopic rod is fitted in the variable length joint body.

[0015]

[Explanation of symbols]

 1 Aircraft 6 Driver's Seat 8 Control Valve Unit 9 Control Lever 11 Seat Bracket 13 Support Bracket 14 Variable Length Joint 17 Support Device

Claims (1)

[Scope of utility model registration request] 1. A support bracket, in which a front and rear adjustable seat bracket is attached to a lower surface of a front portion of a driver's seat, and a control lever is pivotally rotatably supported, is integrally fixed to the seat bracket, and driving is performed. A control lever support device for a tractor, characterized in that a main body of a control valve unit is mounted on a lower body side of a seat, and the main body and the control lever are connected via a variable length joint.