JPH10100711A - Shift lever guide of working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent erroneous operation of a main shift lever being put in a shift operating position undeliberately or when the driver is going to get out of the car. SOLUTION: A main shift lever guide 13 is installed beside the driver seat on its left side, and the neutral region part of a left vertical guide groove 14 of an H-shaped guide A is overhung aside to form a lever receptacle 18, which should receive a shift lever 10 in slant movement from the neutral region N to left ahead of the driver seat, wherein the receptacle 18 is located ahead of the front extremity of a crosswise guide groove 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift lever guide for a tractor, a lawn mower, and the like, and more particularly, to a technique for avoiding inconvenience due to unexpected lever operation.

[0002]

2. Description of the Related Art In a working machine, a shift lever for traveling or PTO is often arranged beside a driver's seat.
In the tractor disclosed in Japanese Patent Application Laid-Open No. 3-295724, a main shift lever for traveling is arranged at a position slightly to the front of the left side of the driver's seat.

[0003]

In the prior art, the main transmission lever guide is formed with an H-shaped guide groove formed by a pair of left and right vertical guide grooves and a horizontal guide groove connecting the vertical guide grooves. In, the shift lever is located in a lateral guide groove portion which is a neutral region. When the operator seated on the driver's seat puts his finger on the neutral main shift lever, the arm is slightly opened to the left and the palm is directed downward. From an engineering point of view, a seated pilot is most likely to move his left hand diagonally forward in the left direction.

Therefore, in the prior art, when the operator simply puts his / her finger on the shift lever to keep his / her hand without being conscious of the shift operation, the main shift lever is unknowingly operated. Tend to move diagonally forward to the left, and there is a risk that the aircraft may enter the traveling second speed position and start running unintentionally. Also, since the getting on and off of the aircraft is usually performed from the left side of the control floor, when getting off the driver's seat outside the aircraft, the shift lever is caught by a part of the body or clothes, etc. The vehicle moved diagonally forward to the second speed position, and there was a risk that the aircraft would unexpectedly start.

Accordingly, a first object of the present invention is to take measures to prevent the shift lever from being unintentionally operated to the shift position.

[0006] When backing up with a working machine, it is often the case that the driver first looks backward, confirms the vehicle backward, and then performs reverse operation in that state. That is, the shift lever is operated from the neutral position to the reverse position without looking at the shift lever. In this case, if the guide groove is provided with the lateral guide groove in the neutral region such as the above-described H shape, the shift lever is currently used. There is a tendency that it is difficult to confirm which of the left and right vertical guide groove areas is present. In other words, if the shift lever in the neutral area is moved left and right and comes into contact with the right groove edge, it is in the right vertical guide groove area, and if it contacts the left groove edge, it is in the left vertical guide groove area. Although it seems to be understood, it may be difficult to determine whether the width is the width of the lateral guide groove or the width of any of the vertical guide grooves based on the operation feeling alone.

For example, when the front and rear widths of the lateral guide groove and the neutral region match (when the front and rear space between the front and rear protruding partition walls 19 and 20 in FIG. 6 matches the front and rear width of the neutral region N). In this case, if the shift lever is moved in the forward or backward direction even a little, there is a possibility that the driver may enter the unintended shift position, for example, the intention of the reverse position enters the forward position, so eventually the gearshift is temporarily performed. The user must visually check the lever guide, and the gearshift operation is slow. In particular, 6 forward steps and 2 reverse steps are provided before and after the guide groove.
In the case of a lever guide for a multi-stage transmission that is arranged at each position, it is conceivable that it is difficult to recognize which part of the vertical guide grooves in a plurality of rows are located.

A second object of the present invention is to make it possible to check the position of the shift lever in the lateral guide groove in the lateral guide groove in the neutral state with the sensation of a finger through the shift lever without looking at the lever guide. It is in.

[0009] Further, in a working machine provided with a shift lever for a continuously variable transmission mechanism such as HST or CVT, as shown in FIG. 8, a forward operation area F, a neutral area N, and a reverse operation area R are provided in this order. However, when the vehicle is operated without looking at the gear shift lever, such as when the vehicle is moving backward while shifting gears while checking backward, the intention is to neutralize slow reverse operation, or to move forward, etc. Slow speed operation near the neutral position was difficult to perform.

Therefore, a third object is to facilitate a speed change operation near a neutral position of a speed change lever for a continuously variable transmission mechanism, for example, such that a low speed operation can be reliably performed even without visual observation.

[0011]

[Means for Solving the Problems]

[Structure] The first to third inventions are means for solving the first problem, the fourth and fifth inventions are for solving the second problem, and the sixth and seventh inventions are means for solving the third problem, respectively.

[0012] In a first aspect, the invention is provided at a position laterally lateral to a driver's seat,
A shift lever guide having a guide groove extending in the front-rear direction is arranged, and a neutral region of the shift lever is set at an intermediate position between the front and rear of the guide groove, and the guide groove in the neutral region extends laterally outward to form a lever receiving portion. The lever receiving portion is configured to be capable of receiving a shift lever that is obliquely moved from the neutral region to the lateral outside and the front side with respect to the driver's seat from the neutral region.

According to a second aspect of the present invention, in the first aspect, the oblique movement direction of the speed change lever and the direction of the dismounting movement from the driver's seat to the outside of the body are substantially set to match.

According to a third aspect, in the first or second aspect,
The rear end of the lever receiving portion is inclined obliquely backward so that the transmission lever can be moved to the rear portion of the guide groove by the operation of moving the transmission lever located at the lever receiving portion rearward.

According to a fourth aspect of the present invention, there is provided a guide comprising a pair of left and right vertical guide grooves extending in the front-rear direction and a horizontal guide groove connecting these vertical guide grooves to each other in a neutral region set at the front and rear middle of one of the vertical guide grooves. A groove is formed in the shift lever guide, and the front-rear width of the lateral guide groove is set to be smaller than the front-rear width of the neutral region.

In a fifth aspect based on the fourth aspect, the speed change lever guide is arranged at a position laterally lateral to the driver's seat, and one of the vertical guide grooves is arranged laterally outside of the other vertical guide groove.
The neutral region of one of the vertical guide grooves extends laterally outward to form a lever receiving portion, and the lever receiving portion can receive a shift lever that obliquely moves from the neutral region toward the lateral outside and the front side with respect to the driver's seat. And the lever receiving portion is located on the front side of the front end of the lateral guide groove.

According to a sixth aspect of the present invention, there is provided a shift lever guide for guiding a shift lever for operating a continuously variable transmission mechanism by forming a guide groove in which a forward operation area, a neutral area, and a reverse operation area are arranged in this order. And a resistance imparting mechanism acting on the shift lever so that the operation resistance of the shift lever becomes large near the neutral region in a region other than the neutral region.

According to a seventh aspect of the present invention, in the sixth aspect, a state is provided in which the action of the resistance imparting mechanism is exerted when the shift lever is in the reverse operation area of the guide groove.

[Operation] According to the configuration of claim 1, (a)
The shift lever, which moves obliquely from the neutral area to the driver's seat laterally outward and forward, can be received by the lever receiver in the neutral area. Even if it has moved, it will not be operated to the shift position. As described above, in the state where the arms are spread horizontally, by grasping the nature of human beings that it is most easy to move fingers in the diagonal direction on the outside and front side, by a simple modification of spreading the guide groove horizontally, It is possible to prevent accidental lever operation such as unintentional starting or rotation of the working device.

According to the second aspect of the present invention, the diagonal movement direction of the shift lever is substantially matched with the movement direction of the operator at the time of getting off. If you get caught on the gearshift and move it,
The moved shift lever is received by the lever receiving portion, and unexpected operation to the shift position is prevented. For example, there is a case in which the vehicle body structure is configured to get on and off from the left side of the floor step, and the speed change lever guide is arranged slightly forward of the left side of the driver's seat.

The lever receiving portion is formed by extending the guide groove laterally, so that the rear end thereof is orthogonal to the guide groove.
Also in this case, if the transmission lever is configured to receive the transmission lever, the transmission lever is received at the rear end of the lever receiving portion when the lever is operated to the rear portion of the guide groove, and it is predicted that it is difficult to operate smoothly or quickly. Therefore, according to the configuration of claim 3, since the rear end of the lever receiving portion is inclined obliquely rearward, if the shift lever in the lever receiving portion is operated to move rearward, it naturally follows the inclination. It can return to the guide groove part,
The lever can be moved to the rear part of the guide groove without stopping once. The rear portion of the guide groove is a reverse operation position, which is convenient when the lever is operated while looking backward.

According to the fourth aspect of the present invention, (b) the front and rear widths of the lateral guide grooves arranged in the neutral region are narrower than the front and rear widths of the neutral region. In the state where the neutral region enters the front side or the rear side of the communicating portion with the vehicle, or the front and rear sides, that is, as shown in FIG. 6, the partition wall portion for distinguishing the left and right vertical guide grooves projects into the neutral region. . Therefore, when it is unclear which vertical groove portion the neutral position is located in, the gearshift lever is operated to either the front or rear end in the neutral region,
If you move the shift lever to the left or right,
Alternatively, it contacts the vertical guide groove wall.

In this state, after slightly moving back and forth toward the center of the neutral region and moving it left and right again, if it is still in contact with the wall, it is a vertical guide groove wall, and if there is no contact, It is possible to judge which vertical guide groove is located only by the sensation of the finger without visually checking that it is a projecting partition wall. For example, even when there are three or more vertical guide grooves, by repeating the above-described operation, it is possible to obtain the number of the vertical guide grooves from the left and right ends where the shift lever is located.

According to the fifth aspect of the invention, the neutral operation area enters the front side of the vertical guide groove, and as shown in FIG. 6, the lever receiving portion 18 and the projecting partition wall 19 face each other in the left-right direction. State. That is, both the function (a) according to the configuration of claim 1 and the function (b) according to the configuration of claim 4 can be exhibited. In addition, if the shift lever received by the lever receiver is moved from that position to the left or right,
It will contact the protruding partition wall. For example, when trying to operate the gear shift operation position and accidentally enter the lever receiving part and cannot move the gear shift lever any more, even if the operator operates the lever in the horizontal direction, it will not enter the adjacent vertical guide groove, Then, by operating the lever in the front-rear direction, it is possible to operate the desired shift position. That is, a new inconvenience due to the new installation of the lever receiving portion can be eliminated by the protruding partition wall.

According to the sixth aspect of the present invention, when the shift lever is operated toward the neutral region in the forward or reverse operation region, the resistance imparting mechanism increases the operation resistance near the neutral region and the lever becomes heavy. Even without looking at the lever, it is possible to recognize that the shift lever has approached the neutral operation area. In addition, since the operating resistance increases, even if the lever is operated with the same operating force as the operating force at a position distant from the neutral area, the operating speed of the shift lever becomes slower when approaching the neutral position. , And it becomes easier to operate at a very low speed than before.

According to the seventh aspect of the present invention, since the resistance applying mechanism is set to operate in the reverse operation area, the shift lever is shifted to the neutral area when the vehicle is in the backward position in which the shift lever is not viewed. It is possible to easily and easily perform the operation of confirming the approach and the extremely low speed operation, thereby improving the speed change operability during reverse travel. At the time of forward movement, it is easy to see the shift lever, and fine fine-speed operation can be performed visually without a resistance applying mechanism. This is advantageous in cost because the forward-side resistance applying mechanism can be omitted.

[Effect] In the working machine according to any one of claims 1 to 3, (c) a simple and economical shift lever guide that expands the guide groove in the lateral direction by considering ergonomics. By devising, it is possible to prevent an unexpected shift operation of the shift lever due to an unconscious finger operation or the like, without adversely affecting the shift operability.

According to the shift lever guide for the working machine described in claim 2, unexpected lever operation accompanying the getting on / off movement of the working machine can be prevented, and a more preferable shift operating structure is provided.

In the shift lever guide for a working machine according to the third aspect, the shift operation is difficult due to the configuration for obtaining the above-mentioned effect (c) by a simple device that inclines the rear portion of the lever receiving portion. Can be eliminated, and a more preferable shift operation structure is achieved.

In the shift lever guide of the working machine according to the fourth and fifth aspects, (d) the position of the shift lever in the neutral operation area can be intuitively confirmed by a simple measure such as setting the width of the lateral guide groove. The speed change operation can be performed reliably even when the vehicle is back.

According to a fifth aspect of the present invention, the shift lever guide for a working machine has the effects of (c) and (d), and erroneously operates again from the inconvenience of unintentionally entering the lever receiving portion. There is an advantage that it can be surely performed.

In the shift lever guide of the working machine according to the sixth and seventh aspects, the operation resistance imparting mechanism can be used practically and conveniently so that the low-speed operation near the neutral in the stepless shift operation can be easily performed.

According to the shift lever guide for a working machine described in claim 7, even when the shift lever is in the reverse position where the shift lever cannot be seen,
There is an advantage that the reverse operation at low speed is easily performed and the shift operability is excellent.

[0034]

BEST MODE FOR CARRYING OUT THE INVENTION

-First Embodiment (Main Gear Transmission Mechanism)-Fig. 1 shows a tractor, 1 is a front steering wheel, 2 is a driving rear wheel, 3 is a ropes, 4 is a transmission case, 5 is a working device, and 6 is a steering unit. It is. In the control section 6, reference numeral 7 denotes a steering handle, 8 denotes a driver's seat, 9 denotes a step floor, and a driving main transmission lever 10, PT
An O shift lever 11 and an auxiliary shift lever 12 are arranged.

As shown in FIG. 2 and FIG.
A speed change lever guide 13 for guiding an operation path such as 0 is disposed on the rear wheel fender 17. The speed change lever guide 13 has left and right vertical guide grooves 14, 15 and front and rear vertical guide grooves 14, 15. A substantially H-shaped guide groove A including a lateral guide groove 16 connected at an intermediate portion is formed for the main transmission lever 10. A forward second speed F2, a reverse R on the rear side, a forward first speed F1 on the front side of the right vertical guide groove 15, and a forward third speed position F3 on the rear side of the right vertical guide groove 14, respectively. The lateral guide groove 16 is a neutral region N.

The neutral region of the left vertical guide groove 14 extends laterally outward to form a lever receiving portion 18, and the lever receiving portion 18 obliquely extends from the neutral region N to the left lateral outside and front side of the driver's seat 8. The moving main transmission lever 10 is configured to be able to receive, and the lever receiving portion 18 is located on the front side of the front end of the lateral guide groove 16. And
When the main shift lever 10 located on the lever receiving portion 18 is moved backward, the main shift lever 10 is moved to the left vertical guide groove 14.
The rear edge 18b, which is the rear end of the lever receiving portion 18, is inclined obliquely rearward so as to be able to move to the rear.

As shown in FIG. 6, the neutral region N is wider than the front-rear width of the lateral guide groove 16, that is, the front-rear width of the front partition wall 19 and the rear partition wall 20.
0 is set in a state where it has been cut into both sides. The lever receiving portion 18 has a front edge 18a facing the side substantially matching the front end of the neutral region N, and an intermediate point of the inclined rear end edge 18b matching the rear end of the neutral region N. Part 18
, The rear end of the front partition wall 19 (corresponding to the protruding partition wall), and the rear end edge 18b and the front end of the rear partition wall 20 (corresponding to the protruding partition wall) in the lateral direction. Are positioned relative to each other.

As shown in FIG. 3, the main shift lever 10 is
The shift case 21 is supported by a shift shaft 21 pivotally supported at the upper end of the transmission case 4 so as to be slidable left and right. The shift shaft 21 is slid by left and right operations of the main shift lever 10 to select two shift forks (not shown). Lever 1
This is a structure in which the shift fork selected by the front / rear operation of 0 is gear-shifted. Further, in order to amplify the slide amount of the shift shaft 21 to an appropriate lateral movement amount of the main shift lever 10, the support rod 22 connected to the shift shaft 21 and the main shift lever 10 are controlled by a restricted pivot mechanism B. Linked and linked.

That is, as shown in FIGS. 4 and 5, the square block 24 at the upper end of the support rod 22 and the brackets 25, 25 fixed to the lower end of the support plate 10a of the main speed change lever 10 are combined.
A helical spring 23, which is pivotally connected by a bolt / nut 26 having a longitudinal axis P and biases the support plate 10a against the support rod 22 toward the lateral side of the body (clockwise in FIG. 4). It is provided. The upper surface of the square block 24
The support plate 10a is constituted by an inclined contact surface 24a obtained by obliquely cutting the outer lateral side (the right side in FIG. 4) of the machine body and a horizontal flat contact surface 24b. While being urged and maintained in a state of contacting the support plate 24a (the state shown in FIG. 4), the support plate 10a can swing in the opposite direction until the support plate 10a contacts the flat contact surface 24b. In other words, the restricted pivoting mechanism B allows the main shift lever 10 to swing left and right with respect to the support rod 22 within a small angle range determined by the inclined contact surface 24a and the flat contact surface 24b.

Therefore, in the free state in the neutral region,
The main transmission lever 10 is in a state of being inserted into the lever receiving portion 18 by the biasing force of the winding spring 23 (see FIG. 6), and the operator sitting on the driver's seat 8 unknowingly puts his left hand on the main transmission lever 10. To move to the left front, the main shift lever 10 only moves forward in the lever receiving portion 18,
This immediately comes into contact with the front edge 18a and stops. Also, even if the clothes of the operator who moves diagonally left forward from the driver's seat 8 when getting off the vehicle are caught on the main shift lever 10, the main shift lever 10 is still received by the lever receiving portion 18 and the second forward speed is not intended. This prevents operation to the position F2.

The restricted pivot mechanism B may be configured as shown in FIG. That is, the cylindrical boss 27 is fixed to the tip of the support rod 22, and the stopper
8 and 29, the main transmission lever 1 is brought into contact with the support plate 10a and the left and right stoppers 28 and 29.
The swing range of 0 is regulated.

-Second Embodiment (HST Main Transmission Mechanism)-This is a case where the main transmission mechanism in the first embodiment described above is constituted by HST, and as shown in FIG. The operation region F, the neutral region N, and the reverse operation region R have a substantially inverted Z shape arranged in this order, and form a shift lever guide 13 for operating a continuously variable transmission mechanism. Further, a resistance applying mechanism D acting on the speed change lever 10 is provided so that the operation resistance of the speed change lever 10 becomes large near the neutral area N in the reverse operation area R.

That is, the overhanging wall 3 in which the left side wall 30 in the reverse operation area R is partially projected toward the right side wall 31.
2 are provided to constitute the resistance-equipped piece mechanism D. Although not shown, the shift lever 10 is urged toward the left side wall 30 similarly to the main shift lever in the first embodiment described above. Accordingly, the speed change lever 10 is always in contact with the left side wall 30 to generate a light operating resistance (or in a state in which the speed change lever 10 moves lightly without just touching). When approaching, the contact pressure gradually increases, and the lever operation resistance increases until the contact reaches the flat portion 32b.

By the way, the left side wall in the neutral region N extends beyond the left side wall in the forward operation region F to form the lever receiving portion 18. In the free state, the speed change lever 10 enters the lever receiving portion 18 and calms down. It is in a state. Therefore, the HST shift lever 10 is also prevented from being unintentionally moved forward by hooking or unconscious finger operation when getting off the vehicle.

[Other Embodiments] In addition to the H shape, the shape of the guide groove A in which the lever receiving portion 18 is provided is an inverted Z shape or a linear shape shown in FIG. 8, or a third forward speed F in the H shape shown in FIG.
It may be a ten-handed shape having no position, or a multi-stage mission having three or more vertical guide grooves. Further, the present invention may be applied to the guide groove of the PTO shift lever 11.

[Brief description of the drawings]

FIG. 1 is a side view of a tractor.

FIG. 2 is a plan view of a driver seat portion.

FIG. 3 is a front view showing the structure of a main transmission lever.

FIG. 4 is a sectional view of a restricted pivot mechanism.

FIG. 5 is an exploded perspective view of the restricted pivot mechanism.

FIG. 6 is a plan view showing a guide groove of the main transmission lever.

FIG. 7 is a sectional view showing another structure of the restricted pivot mechanism.

FIG. 8 is a plan view showing a guide groove of the HST shift lever.

[Explanation of symbols]

 Reference Signs List 8 Driver's seat 10 Shift lever 13 Shift lever guide 14 Vertical guide groove (guide groove) 15 Vertical guide groove 16 Horizontal guide groove 18 Lever receiving part A Guide groove (gear transmission) B Restricted pivot mechanism C Guide groove (HST) F Forward operation area N Neutral area R Reverse operation area

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hirofumi Iriya 64 Ishizu-Kitacho, Sakai-shi, Osaka Inside Kubota Sakai Works

Claims (7)

[Claims] A shift lever guide having a guide groove extending in the front-rear direction is arranged at a lateral side position of a driver's seat,
A neutral region of the speed change lever is set at the front and rear intermediate position of the guide groove, and the guide groove in the neutral region is extended laterally outward to form a lever receiving portion. With this lever receiving portion, the operation from the neutral region is performed. A shift lever guide for a working machine, wherein the shift lever guide is configured to be capable of receiving the shift lever that moves obliquely outward and forward with respect to a seat. 2. The oblique movement direction of the shift lever,
2. The shift lever guide of a working machine according to claim 1, wherein the moving direction from the driver's seat to the outside of the body substantially coincides with the moving direction. 3. The rear end of the lever receiving portion is inclined obliquely rearward so that the transmission lever can be moved to the rear portion of the guide groove by a rearward movement operation of the transmission lever located at the lever receiving portion. The shift lever guide for a working machine according to claim 1, wherein the shift lever guide is configured to be shifted. 4. A speed change of a guide groove comprising a pair of left and right vertical guide grooves extending in the front-rear direction and a horizontal guide groove connecting these vertical guide grooves to each other in a neutral region set at the front and rear middle of one of the vertical guide grooves. A shift lever guide for a working machine, formed on a lever guide, wherein a front-rear width of the lateral guide groove is set smaller than a front-rear width of the neutral region. 5. The shift lever guide is disposed at a lateral side position of a driver's seat, and the one vertical guide groove is disposed laterally outside of the other vertical guide groove, and the one vertical guide groove is provided. A neutral region portion is extended laterally outward to form a lever receiving portion, and the lever receiving portion can receive the shift lever that obliquely moves from the neutral region toward the lateral outer side and the front side with respect to the driver's seat. 5. The shift lever guide for a working machine according to claim 4, wherein the lever receiving portion is located on a front side of a front end of the lateral guide groove. 6. A shift lever guide for guiding a shift lever for operating a continuously variable transmission mechanism by forming a guide groove in which a forward operation area, a neutral area, and a reverse operation area are arranged in this order, and further comprising: A shift lever guide for a work implement including a resistance applying mechanism that acts on the shift lever so that the operation resistance of the lever is large near the neutral region in a region other than the neutral region. 7. The shift lever guide for a working machine according to claim 6, wherein when the shift lever is present in a reverse operation area of the guide groove, the action of the resistance imparting mechanism is exhibited. .