KR920003662Y1 - Forward and backward change operating structure of working vehicle - Google Patents

Abstract

No content.

Description

Back and forth conversion control structure of walking work machine

The figure shows an example of the forward and backward conversion operation structure of the walking type work machine which concerns on this invention, FIG. 1 is a longitudinal side view which shows an operation lever and a cam drive.

2 is a cross-sectional view showing the operation path and the forward and backward conversion structure of the operation lever.

3 is a cross-sectional plan view of an operation lever and the like in a state where the operation lever is operated toward the gas reverse side.

4 is a sectional view taken along the line (IV)-(IV) of FIG.

5 is a cross-sectional view taken along the line (V)-(V) of FIG.

6 is a view showing a cross section and a forward and backward conversion structure of a mission case.

7 is an overall side view of the binder.

8 is a plan view of the binder rear portion.

* Explanation of symbols for main parts of the drawings

8: main clutch 13: operation lever

B: Cam mechanism C: Forward and backward converter

N: Front and rear middle operation position S: Operation route

S ₁ : first operation path S ₂ : second operation path

S ₃ : Transverse Path

The present invention relates to a forward and backward conversion operation structure of a walking type work machine in detail, which enables the forward and backward conversion of a body as one operation lever.

In the related art, as an operation lever capable of converting the gas forward and backward as a single operation lever, for example, as disclosed in Japanese Laid-Open Utility Model Publication No. 56156119, the operation path of the operation lever is stepped ( The stepped part is set to a neutral position, and the operation path steps before and after the stepped part are set to the operation position for advancing and moving the body, respectively.

As the operation position of the operation lever is set in this way, the setting of the operation lever to the above-mentioned neutral position is usually carried out as an artificial operation of the operator.

In this connection, there is also a configuration in which a relatively weak pressing force is applied to the operating lever in substantially the same direction in the forward and backward operating positions to maintain the operating lever in a neutral position (not reference).

In general, in walking-type work machines such as binders and managers, the operator is located behind the aircraft, and the operation lever is a cause against the intention of the worker, such as the worker's hand or clothing sleeve contacting the operation lever without knowing it during operation. There is a danger that the gas will be operated in the gas reverse position.

However, in the conventional operation structure, if the operation lever is operated in the reverse position of the aircraft, contrary to the intention of the operator, there is room for improvement because the operator must operate the operation lever reliably to the neutral position for rapid operation.

An object of the present invention is to solve the above irrationality in a walking type work machine. A feature of the present invention is to connect the operation path of the operation lever with the first operation path facing forward from the front and rear intermediate operation positions, the second operation route facing backward from the intermediate operation position, and both operation paths at the intermediate operation position. In the operation mechanism formed in the stepped state formed as a transverse path, the advancement state is caused by the operation on the first operation path side in the transverse path, and the reverse state is caused by the operation on the second operation path side, respectively. In addition, the operating lever and the forward and backward converter mechanisms are linked to each other, and the main clutch is disconnected at the front and rear middle operating positions of the operating lever, and the main clutch is input by the front and rear operations at the front and rear middle operating positions. The control lever and the main clutch pressurized by disconnecting the control lever are interlocked with each other via a cam mechanism so as to be operated. The cam mechanism is provided so that the operation reaction force of the main clutch applied to the operation lever is largely acted on the second operation path of the first operation path. The operation lever 13 will be described in more detail. The first roller engages in the first recess 21a and is connected to the arm 21 while operating in accordance with the first operation path S ₁ . As the operating lever 13 operates along the second operation path S ₂ , the second roller is engaged with the second recess 21b and connected to the arm 21.

Since the second recess 21b is formed closer to the swing center of the swing arm 21 than the first recess 21a, the first lever 21b moves the operation lever along the second operation path S ₂ . This is because a larger force is required than the side for moving the control lever along the operation path S ₁ .

The effect of this configuration is as follows.

That is, since the main clutch operation force applied to the operation lever is set larger in the second operation path than in the first operation path, the operation resistance applied to the operation lever when the gas is set in the reverse state is set in the gas forward state. It is larger than the operating resistance applied to the operating lever, and this operating resistance acts as a force for restoring the operating lever to the intermediate operating position.

Therefore, even when the operator's hand or clothing sleeve touches the operation lever unintentionally by using the cam mechanism required for the operation system effectively, even if the operation lever is operated in the reverse direction of the aircraft and the operation lever is operated in the reverse direction of the aircraft, the operation lever Can be quickly returned to the front and rear middle operating positions of the operation path, thereby obtaining a safe operation structure.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

As shown in FIG. 7, from the conveying device 3, the reciprocating blade type deodorizing apparatus 2, the conveying apparatus 3 which sends the etched grain stem to the right side of a body, and the conveying apparatus 3 to a body front part as shown in FIG. The work part A which consists of the apparatus 4 which binds the harvesting grain interval of the gas and discharge | releases out of a gas, and installs the engine 5 in the rear part of a body, Install the case (7) with the propulsion wheel (6) on the shaft, and also connect the case (7) and the engine (5) as belt tension type main clutch (8) and connect the case (7). The binder 9 is configured as an example of the walking type work machine by extending the handle 9 from the upper part to the rear side. As shown in FIG. 8, the main clutch shifting the cutting gear lever 10 for clamping the driving force to the work part A posted at the rear part of the missile case 7 and the forward speed of the gas are changed to four stages. Install the lever (11).

Steering clutch levers 12 and 12 are provided on the left and right sides of the handle 9 as described above, and an operation lever for simultaneously controlling the main clutch 8 and the forward and backward conversion of the body on the right side of the handle 9 ( 13) Install.

As shown in FIG. 2, the operation path S of the operation lever 13 described above is the first operation path S ₁ facing forward than the front and rear intermediate operation positions N, and the second operation path facing backward. (S ₂₎ and the front and rear intermediate operating position, and to form on both operating path (S _1), the lateral path (S ₃₎ for connecting the (S ₂₎ in the (N) in the step condition, the front and rear intermediate operation position ( When the operating lever 13 is set to N), the main clutch 8 is disconnected, and when the operating lever 13 is operated either at the front or the rear at the front and rear intermediate operation positions N, the main clutch ( It is configured to input 8).

Further, the operation lever 13 is configured to operate forward and backward by operating the respective end portions F and R of the first and second operation paths S ₁ and S ₂ .

That is, as shown in FIGS. 1 to 5, the cylindrical shaft 16 is pivotally rotatable with respect to the left and right shaft 15 provided on the casing 14 attached to the handle 9. The lower end of the operating lever 13 is attached to the pin 17 provided on the cylinder shaft 16 so as to be able to oscillate, so that the operating lever 13 can be oscillated in accordance with the operating path S. Install.

The aforementioned main clutch 8 is pressurized to be disconnected as a spring (not shown), and is connected via a cam mechanism B and a wire 18 provided at the proximal end of the operating lever 13. .

To explain this, the cam mechanism B supports the rollers 19a and 19b at both front and rear ends thereof, and is provided with the plate 20, the rollers 19a, and 19b provided on the cylindrical shaft 16. Is formed on the upper surface of the cam surface 21S abuts on the upper surface thereof, and as the arm 22 which is pivotable together with the cam 21 and the cam 21 pivoted at the left and right axial center P with respect to the casing 14 described above. It is comprised and the edge part of the wire 18 which operates the main clutch 8 with respect to this arm 22 is attached.

In addition, in the case where the operating lever 13 is operated at the operating positions F and R, respectively, the cam surfaces 21S are provided with rollers 19a and 19b for preserving and maintaining the operating positions of the operating levers 13. ) Form the recesses 21a and 21b which can be played, respectively, and when the operating lever 13 is rocked back and forth at the front and rear intermediate operation positions N, that is, the first operation path S ₁ , The position where the rollers 19a, 19b and the cam surface 21s come into contact with each other so that the operation reaction force when swinging backward is greater than the operation reaction force when swinging forward when operating toward the second operation path S ₂ . Has a relatively large difference with respect to the swing center P of the cam 21.

In addition, the operation reaction force given to the operation lever 13 is attributable to the operation resistance at the time of input operation of the main clutch 8.

In more detail, since the main clutch is pressurized by the disconnection shaft with a spring, a force exceeding the spring force is required for the input operation of the main clutch.

Therefore, when the wire 18 connected to the main clutch is tensioned by the operating lever 13 through the swing arm 21, the spring force pressing the main clutch to the blocking side acts as a counter force.

In addition, as shown in FIG. 6, the traveling drive system of the misson case 7 described above includes an input shaft 24 having a pulley 23 provided at its outer end, a gear group 25 that is loosely fitted to the input shaft, and an input shaft similarly. An interlocking clutch that is loosely fitted to the gear 24 and the input shaft 24 via a spline, and is engaged with the gear group 25 and the shaft 26 of the gear 26, respectively, to transfer driving force. (27), the transmission shaft 28 parallel to the input shaft 24, the two gear groups 29, 30, 30, and the transmission shaft which are externally shifted with respect to the transmission shaft 28 via a spoolline ( In addition to the output gear 31 and the transmission shaft 28 provided at the end of 28, the shaft 32 which integrally formed the sprocket 32a, and the output at the end of the shaft 32, Steering clutch for interlocking connection with the gear 31 and the armless member 34 wound on the sprocket 32a engaged with the gear 31 and the gear 26 (Fig. And the forward gear speed can be set to four speeds by operating the two gear groups 29 and 30 described above with the main shift lever 11 shown in FIG. .

In this regard, the steering clutch is connected so that it can be operated as steering clutch levers 12 and 12.

As shown in FIG. ₂ , the movable member 35, which is brought into contact with the movable lever 13, moves in contact with the second operating path S ₂ from the front-rear intermediate operation position N, which has been transferred, toward the second operation path S ₂ , The casing 14 is provided on a cylindrical shaft 37 that is supported on an oil field 36 provided in an up-down direction, and a swinging arm 38 is provided on the cylindrical shaft 37. The above-described engagement clutch 27 is configured to be shiftable as the shifter 39, and the engagement clutch (for the arm 40a provided at the outer end of the case 40 of the operation shaft 40 of the shifter 29) is engaged. The spring 41 which engages with the gear group 25 which installed 27 is provided, and this arm 40a and the swinging arm 38 are connected through the wire 42 and the spring 43, and operation is carried out. By operating the lever 13 to the gas reverse position R shown in FIG. 3, the engagement clutch 27 is operated to the position R which meshes with the gear 26, and the operation lever 13 is moved to the position R. The engagement clutch 27 is operated to the position F which meshes with the gear group 26, while operating outside ().

And the operating system from these wires 42 which interlock | connect with the above-mentioned movable member 35 to the engagement clutch 27 is called a forward-backward conversion mechanism C. As shown in FIG.

Also, even in the state where the electric main shift lever 11 is set at any shift position, when the operation lever 13 is operated at the gas reverse position R, the main body reverses at a constant speed, and the electric main shift lever ( When 11) is set to the neutral position, even when the operation lever 13 is operated to the gas forward position F, the gas is not advanced and only the main clutch 8 is input.

As shown in FIG. 3, when the operation lever 13 is operated to the gas retracting position R, the movable member 35 provided on the arm 40a applied to the operation lever 13 is provided. The pressing force attributable to the spring 41 is applied in the direction crossing at right angles to the second operating path S ₂ , so that the operating lever 13 is not returned to the front and rear intermediate operating positions N as this pressing force.

In addition to the above-described embodiments, the present invention may, for example, attach a cam having a cam surface to the lower end of the operation arm, and also attach a plate holding an abutting portion, such as a roller, to the casing so that the cam mechanism can swing.

In addition to the belt tension type, the main clutch may be of a friction plate type or an engagement type.

Claims (1)

The first operation path S1 extending in a straight state and one end thereof are connected to the rear end of the first operation path S1 and the transverse path S3 which is tensioned in the transverse direction of the first operation path S1. ) And its front end are connected to the rear end of the lateral path S3 and to the operation path S formed from the second operation path S2 extending in parallel with the first operation path S1. Therefore, in the forward and backward conversion operation structure of the walking type work machine having the moving operation lever 13 and the forward and backward converter mechanism C associated with the above operation lever 13, the above operation lever 13 is It is connected to the forward and backward converter mechanism C via the arm mechanisms 35 and 38 which cooperate with the movement of the operation lever 13, so that the operation lever 13 is the first operation path S1. The forward and backward conversion mechanism C is in the advanced state when it is located at, and the forward and backward conversion mechanism C when the operating lever 13 is located in the second operation path S2. Is the reverse state, and the operation lever 13 is provided with a first roller (19a) and a second roller (19b) so that the operation lever 13 is moved along the first operation path as the first roller is loaded. The rocking arm 21 provided with the first recess 21a and the second recess 21b into which the second roller is engaged as the operation lever 13 moves along the second operation path S2. The second recess 21b is installed in the vicinity of the swinging arm 21 rather than the first recess 21a, and the swinging arm 21 has the operation lever 13 in the lateral direction. Since the main clutch 8 is disconnected by being located at S3 and the operation lever 13 is moved along the first operation path S1 or the second operation path S2, the main clutch 8 is inputted. A forward and backward conversion operation structure characterized in that it is linked with the main clutch (8).