JP7267095B2 - work vehicle - Google Patents

Description

The present invention relates to a work vehicle such as a combine harvester.

A work vehicle is known that includes an operating lever that is pivotally operated about a lever pivot shaft, and a lever guide plate member that has a lever guide hole through which the operating lever passes and covers the base side of the operating lever. there is In this type of work vehicle, if dust enters from the lever guide hole, the dust accumulates around the lever rotation shaft and may interfere with the smooth rotation operation of the operation lever. It has been proposed to cover the lever guide hole with a seal plate made of a soft elastic material having slits (see Patent Documents 1 and 2, for example).

Japanese Patent No. 5576225 JP 2013-120449 A

However, the seal plate made of a soft elastic material may be pushed by the operating lever and may be rolled up to form a large gap.

SUMMARY OF THE INVENTION The present invention has been created with the object of solving these problems in view of the actual situation as described above. and a lever guide plate member for covering a base side of the operation lever, the work vehicle having a lever through hole through which the operation lever passes, a dustproof plate member for covering the base side of the operation lever on the lever rotation shaft side of the lever guide plate member; The work vehicle includes a through-hole cover member that covers the through-hole, and a biasing member that biases the through-hole cover member toward the dustproof plate member .
The invention according to claim 2 is the work vehicle according to claim 1 , wherein the dustproof plate member is also used as a lever support member that supports the operation lever via the lever rotation shaft. characterized by

According to the first aspect of the invention, the lever through-hole through which the operation lever passes is provided, and the dust-proof plate member that covers the base side of the operation lever on the lever rotation shaft side of the lever guide plate member is provided. Intrusion of dust can be prevented by the double structure of the guide plate member and the dustproof plate member. In addition, since the through-hole covering cover member that covers the lever through-hole is provided, it is possible to prevent dust from entering from the lever through-hole of the dustproof plate member. Moreover, since the through-hole cover member is provided on the operating lever side and covers the lever through-hole while interlocking with the turning operation of the operating lever, it does not need to be formed of a soft elastic material. As a result, it is possible to avoid the occurrence of gaps due to curling and the deterioration of dust resistance due to aged deterioration. In addition, if the through-hole covering member is made of a hard material, the dust-proof plate member and the through-hole covering member may be scratched and damaged. There is no possibility that the appearance will be deteriorated.
Moreover , since the through-hole cover member is further provided with a biasing member that biases the through-hole cover member toward the dust-proof plate member, the through-hole cover member is brought into close contact with the dust-proof plate member, and the gap between the through-hole cover member and the dust-proof plate member is maintained. It is possible to prevent dust from entering.
Further, according to the second aspect of the invention , the dustproof plate member is also used as a lever support member for supporting the operation lever via the lever rotation shaft, so that the number of parts can be reduced and the structure can be simplified. In addition, since the distance between the lever rotating shaft and the dustproof plate member is shortened, the size of the lever through-hole and the through-hole cover member can be reduced.

It is a side view showing a combine of one embodiment of the present invention. It is a top view showing the combine of one embodiment of the present invention. 1 is an exploded perspective view showing a travel auxiliary gear shift lever and its surroundings of a combine harvester according to an embodiment of the present invention; FIG. 1 is a front view showing a traveling auxiliary shift lever and its surroundings of a combine harvester according to an embodiment of the present invention; FIG. It is a side view which shows the driving|running|working auxiliary gearshift lever of the combine of one Embodiment of this invention, and its periphery. It is a top view which shows the driving|running|working auxiliary gearshift lever of the combine of one Embodiment of this invention, and its periphery. 1 is a perspective view showing a travel auxiliary gear shift lever and its surroundings of a combine harvester according to an embodiment of the present invention; FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, 1 is a combine (working vehicle), and the combine 1 includes a pretreatment section 2 for harvesting culms, and a threshing section 3 for threshing and sorting grains from the harvested culms. , a grain tank 4 for storing the selected grains, a discharge auger 5 for discharging the grains in the grain tank 4 to the outside of the machine, a post-processing unit 6 for post-processing threshed culms, and work It has a control section 7 on which a person rides and a crawler type traveling section 8. - 特許庁

As shown in FIG. 2, the operation unit 7 includes a seat 9 on which an operator sits and various operation tools. The operation tools arranged in the control unit 7 include a key switch 10 that serves as both a main power switch and an engine start switch, a multi-steering lever 11 that also serves as a steering operation tool and a pre-processing unit elevation operation tool, and a stepless running speed control tool. a traveling main gearshift lever 12 that shifts gears to , a traveling auxiliary gearshift lever 13 (an example of an operation lever) that switches stepwise the gear range of the traveling main gearshift lever 12, an engine control lever 14 that changes the engine speed, and preprocessing A reaping clutch operating tool for turning on/off the power supply to the section 2 and a threshing/reaping clutch lever 15 that doubles as a threshing clutch operating tool for turning on/off the power supply to the threshing section 3 are included.

Next, a support structure and a dustproof structure for the travel sub-shift lever 13, which are essential parts of the present invention, will be described with reference to FIGS. 3 to 7. FIG.

The travel sub-transmission lever 13 of this embodiment is connected to a travel sub-transmission mechanism (not shown) in a transmission case (not shown) via a lever support mechanism 16, a first shift rod 17 and a second shift rod 18. The traveling auxiliary transmission mechanism is shifted based on the two-way lever rotation operation.

The lever support mechanism 16 includes a first lever rotating shaft 19 that supports the traveling auxiliary gearshift lever 13 so as to be capable of rotating back and forth, and a second lever rotating shaft 20 that supports the traveling auxiliary gearshift lever 13 so that it can be rotated left and right. and a first lever arm 21 which is connected to the first shift rod 17 and which rotates up and down in accordance with the front-rear rotation operation of the traveling auxiliary gear shift lever 13, and a second gear shift rod 18 which is connected to the traveling auxiliary gear shift lever 13. It has a second lever arm 22 that rotates up and down in accordance with left and right rotation, and brackets 24 and 25 for fixing the lever support mechanism 16 to a lever support member 23, which will be described later.

The second lever rotation shaft 20 integrally includes a second lever arm 22 and a support portion 20a that rotatably supports the first lever rotation shaft 19, a dustproof plate member 27, and a lever support member. 23 via brackets 24 and 25 so as to be rotatable to the left and right.

The first lever rotating shaft 19 integrally includes the travel sub-transmission lever 13 and the first lever arm 21, and supports the second lever rotating shaft 20 through a support portion 20a so as to be capable of rotating back and forth. be done.

The first lever arm 21 of the present embodiment is also used as a reinforcing member for the travel auxiliary shift lever 13 . Specifically, the first lever arm 21 extends from the base of the traveling auxiliary gearshift lever 13 along the tip side, and integrally includes a reinforcing portion 21a that is joined to the traveling auxiliary gearshift lever 13 by joining means such as welding. have. The reinforcing portion 21 a has a plate shape extending in the front-rear direction and the up-down direction, and its front-rear width is larger than the front-rear width of the travel auxiliary shift lever 13 .

A lever guide plate member 26 that covers the base side of the traveling auxiliary gear shift lever 13 is provided above the base of the traveling auxiliary gear shift lever 13 . The lever guide plate member 26 is formed with a lever guide hole 26 a that allows the travel auxiliary gear shift lever 13 to rotate back and forth and left and right, and guides the movement operation of the travel auxiliary gear shift lever 13 .

A dustproof plate member 27 is provided below the lever guide plate member 26 . The dustproof plate member 27 has a lever through-hole 27a through which the traveling auxiliary gearshift lever 13 penetrates in the vertical direction and allows the traveling auxiliary gearshift lever 13 to rotate back and forth and to rotate left and right. It covers the base side (lever support mechanism 16) of the travel auxiliary shift lever 13 on the side of the lever rotation shafts 19 and 20. As shown in FIG. According to such a configuration, the double structure of the lever guide plate member 26 and the dustproof plate member 27 can prevent dust from entering. It is possible to reduce the possibility that the smooth rotation operation of the sub-transmission lever 13 is hindered.

The lever through-hole 27a of the dustproof plate member 27 is covered with a through-hole cover member 28 to prevent dust from entering through the lever through-hole 27a. Specifically, the through-hole cover member 28 is a plate member provided on the traveling auxiliary gearshift lever 13 side, and covers the lever through-hole 27a while interlocking with the rotation operation of the traveling auxiliary gearshift lever 13 .

According to such a through-hole cover member 28, since it is not necessary to form it with a soft elastic material, it is possible to avoid the occurrence of gaps due to curling and the deterioration of dust resistance due to deterioration over time. Further, if the through-hole covering member 28 is made of a hard material, the dust-proof plate member 27 and the through-hole covering member 28 may be rubbed and damaged. Since it is covered with the plate member 26, there is no fear of degrading the appearance.

The through-hole cover member 28 has a through-hole 28a through which the traveling auxiliary gear shift lever 13 penetrates in the vertical direction. 13 is interlocked with the turning operation. The through-hole 28a includes a circular portion 28b through which the main body of the traveling auxiliary gear shift lever 13 penetrates, and a non-circular portion 28c through which the reinforcing portion 21a of the first lever arm 21 penetrates. According to such a configuration, the through-hole cover member 28 can be prevented from rotating by using the reinforcing portion 21 a of the first lever arm 21 , so that the through-hole cover member 28 can be rotated about the travel auxiliary shift lever 13 . Not only can interference with peripheral members be prevented, but an increase in the number of parts and complication of the structure can be avoided as compared with the case where a separate anti-rotation member is provided.

The through hole cover member 28 of the present embodiment is provided along the lower surface of the dustproof plate member 27 and is biased toward the lower surface of the dustproof plate member 27 by a biasing member 29 . According to such a configuration, the through-hole cover member 28 is brought into close contact with the dust-proof plate member 27 to prevent dust from entering from between the through-hole cover member 28 and the dust-proof plate member 27 .

The urging member 29 of the present embodiment is a compression coil spring, and can be handled as an assembly by inserting it into the traveling auxiliary shift lever 13 together with the through-hole cover member 28 in advance, thereby avoiding complication of the assembly process. In addition, since the biasing member 29 is prevented from falling downward by using the stepped portion 21b of the first lever arm 21, the number of parts is increased compared to the case where a stopper member for the biasing member 29 is separately provided. A complicated structure can be avoided. The through-hole cover member 28 may be provided along the upper surface of the dustproof plate member 27 . At this time, the biasing member 29 may be omitted.

The lever guide plate member 26, the dustproof plate member 27, and the lever support member 23 are fixed to the frame member 7a mounted and supported on the body frame 1a. It should be noted that the frame 7 member a is a cabin frame if the control section 7 is a cabin specification, and is not a cabin frame but an control section frame if it is a specification without a cabin.

In addition, the dustproof plate member 27 of the present embodiment is also used as a lever support member that supports the travel auxiliary shift lever 13 via the lever rotation shafts 19 and 20 . More specifically, the brackets 24 and 25 of the lever support mechanism 16 that supports the travel auxiliary gear shift lever 13 via the lever rotation shafts 19 and 20 are not only the lever support member 23 described above, but also the dustproof plate member 27. is also fixed for According to such a configuration, it is possible to reduce the number of parts and simplify the structure based on the sharing of parts. Further, since the distance between the lever rotation shafts 19 and 20 and the dustproof plate member 27 is shortened, the lever through-hole 27a and the through-hole cover member 28 can be made small.

According to the present embodiment, which is constructed as described above, the travel sub-shift lever 13 that is pivotally operated about the lever pivot shafts 19 and 20 and the lever guide hole 26a through which the travel sub-shift lever 13 penetrates are provided. , and a lever guide plate member 26 that covers the base side of the traveling auxiliary gear shift lever 13, and has a lever through hole 27a through which the traveling auxiliary gear shift lever 13 penetrates, and the lever guide plate member 26 Since the dustproof plate member 27 is provided to cover the base side of the travel auxiliary shift lever 13 on the side of the lever rotating shafts 19 and 20, the double structure of the lever guide plate member 26 and the dustproof plate member 27 prevents dust from entering. can be prevented.

Moreover, since the through-hole cover member 28 that covers the lever through-hole 27a is provided, dust can be prevented from entering from the lever through-hole 27a of the dustproof plate member 27. FIG.

Further, the through-hole covering cover member 28 is provided on the side of the travel sub-shift lever 13 and covers the lever through-hole 27a while interlocking with the rotational operation of the travel sub-shift lever 13, so it does not need to be made of a soft elastic material. As a result, it is possible to avoid the occurrence of gaps due to curling and the deterioration of dust resistance due to aged deterioration.

Further, if the through-hole covering member 28 is made of a hard material, the dust-proof plate member 27 and the through-hole covering member 28 may be rubbed and damaged. Since it is covered with the plate member 26, there is no fear of degrading the appearance.

Further, since the biasing member 29 that biases the through-hole covering lid member 28 toward the dustproof plate member 27 is further provided, the through-hole covering lid member 28 is brought into close contact with the dustproof plate member 27, and the through-hole covering lid member 28 and the dustproof plate member 27 are brought into close contact with each other. It is possible to prevent dust from entering from a space between the cover plate member 27 and the cover plate member 27 .

Further, since the dustproof plate member 27 is also used as a lever support member that supports the travel sub-transmission lever 13 via the lever rotation shafts 19 and 20, the number of parts can be reduced and the structure can be simplified. Further, since the distance between the lever rotation shafts 19 and 20 and the dustproof plate member 27 is shortened, the lever through-hole 27a and the through-hole cover member 28 can be made small.

The present invention is not limited to the above embodiments, and various modifications and changes are possible within the scope of the gist of the present invention described in the claims. For example, in the above-described embodiment, the present invention is applied to the traveling auxiliary gear shift lever 13 of the combine harvester 1, but the present invention can be applied to operation levers other than the traveling auxiliary gear shift lever 13 provided in the combine harvester 1 and to work vehicles other than the combine harvester 1. It can also be applied to an operating lever provided.

1 combine harvester 13 traveling auxiliary gearshift lever 16 lever support mechanism 19 first lever rotation shaft 20 second lever rotation shaft 26 lever guide plate member 26a lever guide hole 27 dustproof plate member 27a lever through hole 28 through hole cover member 29 biasing member

Claims (2)

an operation lever that is rotated about a lever rotation shaft;
A work vehicle comprising a lever guide plate member having a lever guide hole through which the operation lever passes and covering a base side of the operation lever,
a dustproof plate member having a lever through-hole through which the operation lever passes, and covering a base side of the operation lever on the lever rotation shaft side of the lever guide plate member;
a through-hole covering cover member provided on the operating lever side and covering the lever through-hole while interlocking with the rotating operation of the operating lever;
and a biasing member that biases the through hole cover member toward the dustproof plate member . The work vehicle according to claim 1 , wherein the dustproof plate member also serves as a lever support member that supports the operation lever via the lever rotation shaft.

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