JPH0315792Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an accelerator device for a tractor or the like having a foot accelerator pedal and a hand accelerator lever.

<Prior Art> Tractors are generally equipped with a hand accelerator system in order to drive at a constant speed during work. The hand accelerator lever of this hand accelerator system is configured to operate the speed adjustment lever for operating the injection pump in the acceleration direction by rotating it in the direction of pulling toward you.

However, in the United States or depending on the operator's preference, the acceleration direction of the hand accelerator lever is set to the forward pushing direction.

<Problems to be solved by the invention> In the prior art, the pull acceleration and push acceleration of the hand accelerator lever are set at the time of assembling the tractor, and changing them involves changing parts and the acceleration This requires disassembly and assembly of the device.

<Means for solving the problem> The present invention solves the problems of the prior art by providing an arm 1 that rotates integrally with the hand accelerator lever 17.
8, a connecting portion B of the connecting member 27 is formed for operating the speed adjustment lever 42 in the acceleration direction A when the lever 17 is rotated in the pulling direction E, and
A connecting portion A of the connecting member 27 is formed to operate the speed adjustment lever 42 in the acceleration direction A when the lever 17 is rotated in the pushing direction C, and the connecting member 27 is connected to both connecting portions A and B by an arm. All of these problems can be solved by making it detachable from the outside and by providing angle setting means between the arm and the shaft support at positions equidistant from both connecting parts A and B. .

That is, the specific configuration of the problem solving means of the present invention is as follows:
A hand accelerator lever 17 and a hand accelerator lever 1 are attached to a lever shaft 19 supported on a shaft support base 7.
A link 39 is provided, in which the arm 18 that rotates together with 7 is loosely fitted, and the speed adjustment lever 42 is operated in the acceleration direction A by depressing the foot accelerator pedal 34, and one end of the connecting member 27 is connected to this link 39. , a hand accelerator lever 17 is attached to the arm 18.
The connecting member 27 forms a connecting part B for connecting the other end of the connecting member 27 for operating the speed adjustment lever 42 in the acceleration direction A by rotating in the pulling direction E, and the speed can be adjusted by rotating the hand accelerator lever 17 in the pushing direction C. Adjustment lever 42
This is an accelerator device in which a connecting part A for connecting the other end of a connecting member 27 is formed in order to operate the connecting member 27 in the acceleration direction A, and the other end of the connecting member 27 is pushed and pulled, and the outer side of the arm 18 is connected to each connecting part A, B. It can be attached and detached from both sides,
The present invention is characterized in that an angle setting means for setting the rotation angle of the arm 18 is provided between a position equidistant from each connecting portion A, B of the arm 18 and the shaft support base 7.

<Function> The lower end of the connecting member 27 is connected to a link 39 connected via the speed adjustment lever 42 and the accelerator rod 40, and the upper end of this connecting member 27 is connected to the pull connecting portion B of the arm 18. When the hand accelerator lever 17 is rotated in the pulling direction E, the speed adjustment lever 42 is operated in the acceleration direction A, and when the upper end of the connecting member 27 is separated from the pulling connecting part B and connecting to the pushing connecting part A, When the hand accelerator lever 17 is rotated in the pushing direction C, the speed adjustment lever 42 is operated in the acceleration direction.

The notch 28 of the angle setting means is located at a position equidistant from both connecting parts A and B of the arm 18, and can be engaged with the angle setting pin 29 of the shaft support 7, so that the connecting member 27 can be connected to either connecting part. Even when connected to A and B, the rotation angle of the hand accelerator lever 17 can be set, and the amount of operation of the connecting member 27 can be made uniform.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

In Figures 1, 2, and 4, 1 is the tractor body 2.
The cabin is mounted on the rear upper part, and inside the cabin, a control section 3 is arranged at the front, and a seat device 4 is arranged at the rear.
is located.

A post support 6, a shaft support 7, a brake cylinder 8, etc. are attached to a mounting plate 5 provided at the lower front of the cabin 2. The post support 6
A handle post 10 is attached via a pivot 9 so as to be tiltable, a support shaft 11 is supported on the shaft support 7, and a pair of left and right brake pedals 1 are supported.
2 and a clutch pedal (not shown) are loosely fitted.

The brake pedal 12 is connected to the brake cylinder 8
is operably connected to. 13 is a switch that detects depression of the brake pedal 12 and turns on a brake lamp.

A joint shaft 15 is attached to one end of the support shaft 11 with a bolt 16.
The end of the support shaft 11 and the joint shaft 15 form a lever shaft 19 that supports the hand accelerator lever 17 and the arm 18. The joint shaft 15 may be integrally molded with the support shaft 11.

The boss portion 17a of the hand accelerator lever 17 and the arm 18 formed of a substantially diamond-shaped plate are loosely fitted onto the lever shaft 19, and a pin 20 implanted in the arm 18 is loosely fitted onto the lever shaft 19.
engages with the flange portion 17b of the boss portion 17a,
Both can be rotated together.

A friction plate 21 is provided between the arm 18 and the shaft support 7.
is interposed between the lever 17 and the arm 1 by a spring 22 provided on the outer end side of the lever shaft.
8 and the friction plate 21 are pressed against the shaft support 7, and due to the frictional resistance of the friction plate 21, the lever 17 is stopped at the rotated position. 23 is a washer, 24 is a joint shaft 15
The spring 22 adjustment nuts screwed onto the springs 22 are shown.

The arm 18 is provided with two pins 26a and 26b at substantially symmetrical positions on the left and right sides of the lever shaft 19.
is planted to connect the connecting member 27.
Two connecting portions A, B are formed, and both pins 26a, 2
A notch 28 is formed at a lower position equidistant from 6b. This notch 28 can engage with an angle setting pin 29 screwed onto the shaft support 7, and the arm 18 can rotate within the length of this notch 28.

That is, the notch 28 and the angle setting pin 29 constitute an angle setting means for setting the rotation angle of the arm 18, and the notch 28 serves as an angle setting means for setting the rotation angle of the arm 18.
By being located at the same distance from the hand accelerator lever 17, the rotation angle of the hand accelerator lever 17 required to operate the connecting member 27 by a certain amount is uniform no matter which connecting part A or B the connecting member 27 is connected to. , Also, the rotation position is also constant and only the direction is reversed.

The connecting member 27 is formed of a rod, and the upper end of the rod is bent into an elongated shape to form a connected portion 30 having a long hole 30a, through which the pin 26a or 26b can be freely inserted and removed from the outside of the arm 18. The pin 26a or 26b is configured to fit and connect with the arm 18, and the pin 26a or 26b engages with the connected portion 30 by rotating in only one different direction to pull up the connecting member 27, and rotates in the other direction. In this case, only relative movement within the elongated hole 30a is performed.

31 is a washer fitted to the pin 26, and the retaining pin 3
By removing this washer 31 and fixing pin 32, the connected part 30 can be separated from the connecting part A and can be connected to the other connecting part B.

A foot accelerator pedal 34 is supported on the lower right floor of the cabin 1 or on the step 35 via a pivot 36, and is in contact with one end of an interlocking arm 37, and the other end of the interlocking arm 37 is connected via a rod 38. It is connected to link 39.

The link 39 is formed by welding a first link 39b and a second link 39c to a boss portion 39a that is pivotally supported on the mounting plate 5 or the step 35, and can also be formed with a bell crank. 39
The lower end of the connecting member 27 is connected to the second
Link 39c has rod 38 and axel rod 4.
0 are connected.

An accelerator rod 40 is a speed adjustment lever 4 of an injection pump 41 of an engine (not shown).
2, and by moving in the direction of arrow A in FIG. 1, the speed adjustment lever 42 is operated in the acceleration direction. Therefore, the foot accelerator pedal 34
When the user depresses the link 39, the link 39 is rotated in the direction of arrow (A), and the speed adjustment lever 42 is rotated in the acceleration direction.

The connecting member 27 shown by the solid line in FIG. 1 is set in the pushing acceleration state α, and the hand accelerator lever 1
7 in the direction of arrow U (rotation in the direction of pushing forward from the operator), the connecting member 27 is pulled up via the connecting part A, and the link 39 is rotated in the direction of arrow A to move the speed adjustment lever 42. Operate in the direction of acceleration. When the hand accelerator lever 17 is rotated in the direction of arrow D for deceleration, the pin 26a is inserted into the elongated hole 30.
a, and the connecting member 27, link 39, and accelerator rod 40 are each returned in the deceleration direction by the return operation (or return spring) of the speed adjustment lever 42.

When the connecting member 27 is set to the pull acceleration state β shown by the imaginary line in FIG. 1, the hand accelerator lever 17
When the connecting member 27 is rotated in the direction of arrow D, that is, pulled toward the operator, the connecting member 27 is pulled up and the speed adjustment lever 42 is operated in the acceleration direction.

Note that the elongated hole 30a at the upper end of the connecting member 27 is
This is to prevent the hand accelerator lever 17 from being rotated when the foot accelerator pedal 34 is depressed, and an elongated hole is formed in the first link 39b instead of the elongated hole 30a. ,
The lower end of the connecting member 27 may be engaged with the elongated hole.

FIG. 3 shows another example of the support structure for the hand accelerator lever 17 and the arm 18, in which the arm 18 is welded to the boss portion 17a of the hand accelerator lever 17, and one washer 44 is fitted therein.
The end of the support shaft 11 itself serves as a lever shaft 19, and a washer 45 is attached to it via a bolt 16, with a spring 22 interposed between it and the washer 44. The spring 22 presses the boss portion 17a and the arm 18 against the shaft support 7 via the friction plate 21, and the hand accelerator lever 17
and provides rotational frictional resistance to the arm 18.

4 to 7 show an example of the air conditioner 51 of the tractor cabin 1. The air conditioner 51 installed on the ceiling of the cabin 1 takes in outside air from the inlet 52, Air filter 53
It is configured to purify the air, introduce it into the device main body 55 using a blower 54, adjust the temperature, humidity, etc., and then discharge it into the room through a duct from the ceiling of the cabin 1 or elsewhere.

Conventionally, the air filter 53 is directly attached to the afterroof 56, and processing of the afterroof 56 is troublesome.
It was difficult to attach and detach the cover, and a gap was likely to be formed between the cover and the blower 54, making it difficult to achieve more complete dustproofing. Therefore, this problem is solved by detachably attaching the air filter 53 to the case 57 of the blower 54.

A bulging filter mounting portion 58 is formed at the rear upper part of the blower case 57.
A set of air filters 53 is attached via metal fittings 59, bolts 60, and the like. Although not shown, the left and right outer ends of the air filter 53 are engaged with engagement recesses formed at the left and right ends of the mounting portion 58.

Reference numeral 61 denotes a net member provided at the air installation port 52, the front portion of which is locked to the lower surface of the after roof near the installation port 52, and the rear portion of the net member that can be freely connected and detached by a shrimp-shaped stopper 62 provided on the back surface of the after roof 58. It is locked.

<Effects of the invention> According to the invention described in detail above, the arm 18 that rotates integrally with the hand accelerator lever 17 is configured to move the speed adjustment lever 42 in the acceleration direction when the hand accelerator lever 17 is rotated in the pulling direction. In addition to forming the connecting part B of the connecting member 27 for operating the hand accelerator lever 17 in the pushing direction C, the connecting member 27 also operates the speed adjusting lever 42 in the acceleration direction A when the hand accelerator lever 17 is rotated in the pushing direction C. A connecting portion A is formed, and the connecting member 27 is connected to both connecting portions A and B by the arm 18.
An angle setting means for setting the rotation angle of the arm 18 is provided between a position equidistant from each connecting part A, B of the arm 18 and the shaft support 7, so that the hand The push/pull acceleration operation can be changed very easily from the outside of the arm 18 without disassembling the accelerator lever 17, arm 18, etc., and even if the acceleration operation direction is changed to either push or pull, the hand accelerator lever 17 The rotation angle can be set without changing the required rotation angle and rotation position.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of the present invention. Figure 1 is an overall side view, Figure 2 is a sectional view taken along the line - - in Figure 1, and Figure 3 is a support structure for the hand accelerator lever and arm. 4 is a sectional view showing another example; FIG. 4 is a sectional side view of the rear upper part of the tractor to which the present invention is applied;
7 to 7 show an air filter mounting structure in a cabin air conditioner, FIG. 5 is an exploded perspective view, FIG. 6 is a sectional side view, and FIG. 7 is an enlarged explanatory view of a stopper. 1...cabin, 2...tractor body, 7...
Shaft support stand, 11... Support shaft, 17... Hand accelerator lever, 18... Arm, 19... Lever shaft,
27... Connecting member, 30... Connected part, 34...
Foot accelerator pedal, 39... Link, 40...
...Accelerator rod, 42...Speed adjustment lever,
A, B...Connection part, α...Press acceleration state, β)...
...Pulling acceleration state.

Claims (1)

[Claims for Utility Model Registration] A hand accelerator lever 17 and an arm 18 that rotates together with the hand accelerator lever 17 are loosely fitted onto a lever shaft 19 supported by a shaft support 7, and the foot accelerator pedal 34 is depressed. A link 39 is provided for operating the speed adjustment lever 42 in the acceleration direction A, one end of the connecting member 27 is connected to this link 39, and the hand accelerator lever 17 is connected to the arm 18.
The connecting member 27 forms a connecting part B for connecting the other end of the connecting member 27 for operating the speed adjustment lever 42 in the acceleration direction A by rotating in the pulling direction E, and the speed can be adjusted by rotating the hand accelerator lever 17 in the pushing direction C. Adjustment lever 42
This is an accelerator device in which a connecting part A for connecting the other end of a connecting member 27 is formed in order to operate the connecting member 27 in the acceleration direction A, and the other end of the connecting member 27 is pushed and pulled, and the outer side of the arm 18 is connected to each connecting part A, B. It can be attached and detached from both sides,
An accelerator device characterized in that angle setting means for setting the rotation angle of the arm 18 is provided between a position equidistant from each connecting portion A, B of the arm 18 and the shaft support base 7.