JPS5813371Y2 - Passenger tractor change lever device - Google Patents

Description

[Detailed description of the invention] This invention relates to a change lever device, and more specifically, to a gear transmission for a passenger tractor.
To perform accurate and reliable change operation with a simple structure using only one lever even if gear transmission devices are installed at positions separated from each other.

Modern tractors are required to have a large number of gears in order to quickly respond to work conditions, and for this reason, some tractors are equipped with a super reduction gear in addition to the main transmission and sub-transmission.

Currently, each of the above-mentioned transmission devices is equipped with an individual speed change operation means, which results in extremely poor operational performance, makes it difficult to distinguish the operation mode at present, and complicates the structure. is inviting.

In particular, in addition to the change lever for the travel system, tractors for earthworks and farming use control levers for the brake pedal, clutch pedal, accelerator system, as well as the travel system, PTO system, and hydraulic system for lifting and lowering the work equipment. It is equipped with a wide variety of operating levers, such as:

Therefore, when each of the above-mentioned transmissions is controlled by an individual transmission operating means, this operation is extremely troublesome, and in particular, in conventional tractors, the change lever for the auxiliary transmission is located below the driver's seat. The change lever for the super reduction gear was located in front of the driver's seat, making it difficult to operate.

In view of this situation, the present invention is designed to enable the operation of objects to be changed, such as auxiliary transmissions and super-reduction devices, which are located apart from each other, with a single change lever. This allows for compact installation by utilizing the narrow space of .

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

In FIGS. 1 and 2, numeral 1 indicates the entire tractor, and numeral 2 indicates the vehicle body, which is composed of a transmission case as a structure.

The vehicle body 2 includes a main transmission 3, an auxiliary transmission 4, a super reduction gear 5, and the like.

Reference numeral 6 denotes a pair of left and right rear wheels, which are attached to the vehicle body 2 such as the rear axle case 2a.
A pair of left and right wheel fenders 7 erected therein cover each inner surface and upper outer area.

Reference numeral 8 denotes a hydraulic system for lifting and lowering the working machine, which is placed on the upper rear surface of the vehicle body 2 and has a pair of left and right lift arms 9.

Reference numeral 10 denotes a driver's seat, which is provided on the vehicle body 2. In the embodiment, it is provided above the hydraulic system 8 via a support means, and the fender 7 is erected on the outside of the driver's seat (seat). There is.

Reference numeral 11 denotes a steering wheel, which is located at the front of the driver's seat 10.

Reference numeral 12 denotes a main change lever device consisting of a main transmission for traveling and a PTO transmission, and is provided on the upper surface of the midsection of the vehicle body 2.

Reference numeral 13 denotes a pair of left and right steps, which are provided in an overhanging manner on both sides of the midsection of the vehicle body 2. Usually, the right step 13 is provided with a pair of left and right brake pedals, and the left step 13 is provided with a clutch pedal 14.

Referring to FIGS. 3 to 5, the plate-shaped support 15
is provided on the vehicle body 2 below the driver's seat 10 by appropriate means, and one side edge of this support 15 has a notch 16.
is formed.

The cutout portion 16 is located substantially on the lower side of the driver's seat 10,
In the figure, it is located on the left side of the central portion of the driver's seat 10 in the longitudinal direction.

Reference numeral 17 denotes a holding member which is substantially U-shaped and stored in the cutout 16, and is attached to the support body 15 via a bracket 18 and a bolt 19.

At this time, in order to reinforce the support body 15, a rib 20 is formed to protrude at the edge of the notch 16, as shown in FIG.

Reference numeral 20 denotes a change lever support means, which supports the aforementioned holding member 17.
It is installed on.

The support means 21 has a support shaft 22 inserted laterally through the opposing wall of the holding member 17, two nuts 23 are screwed into the threaded portion 22a of the support shaft 22, and torque is applied by adjusting the threaded engagement of the NANDs 23. is adjusted.

A rotation stopper pin 24 is provided on the opposite side of the nut 23 and passes through the spindle 22 in the radial direction.
, 2, it engages with a groove 25 formed in the holding member 17 and substantially functions to prevent the spindle 22 from rotating.

On the support shaft 22, an arm 26 for sub-shifting and an arm 27 for ultra-deceleration are fitted in a cylindrical shape so as to be relatively rotatable. Boss portion 29 indicates a cylindrical boss portion for arm 27.

As shown in the figures, particularly in Figures 3 and 4, the cylindrical boss portion 28 is fitted onto the support shaft 22 via a bush 30, and the arm 2
6, pin-shaped engaging bodies 31 and 32 are formed to protrude inwardly below the support shaft 22 and are shifted vertically and longitudinally.

The cylindrical boss portion 29 is directly fitted onto the support shaft 22, and above the support shaft 22 at the upper part of the arm 27 is an engaging body 3 having a U-shaped plane.
3 is installation.

Note that the cylindrical boss portion 28 may be directly fitted onto the sleeve, and the cylindrical boss portion 29 may be fitted onto the bushing 30 through the bushing 30.

Further, the outer arm 26 has a pivot hole 26a at its lower part, and this pivot hole 26a is bent so as to be located inside the vehicle body 2, and the inner arm 27 has a pivot hole 27a at its lower part. However, the pivot hole 27a is located above the pivot hole 26a and outside the vehicle body 2.

Reference numeral 34 denotes a selection plate, which has an elongated hole 34a so that it can move forward and backward in the radial direction, that is, up and down, with respect to the support shaft 22, and rotates around the axis of the support shaft 22 via a pair of resistors 35 and 36. It is freely interposed between the respective boss portions 28 and 29.

A pair of resistors 35 and 36 are in the shape of disc plates made of urethane rubber, plastic, etc.
Each arm 26, 27 rotates or swings around the support shaft 22 due to the frictional force between the selection plate 34 and the selection plate 34.The frictional force causes the tightening when tightening the nut 23 to the threaded portion 22a of the support shaft 22. Can be adjusted with torque.

Note that the pair of resistors 35 and 36 are located at respective boss portions 28 and 36 in the figure.
Although it is said to be separate from 29, it may be a pair.

37 is a change lever, as shown in Fig. 4, the fender 7
The engaging body 33 is inserted vertically into the gap between the seat 10 and the seat 10, has a grip 37a on the upper part, has a lower part directed inward through a bent part, and is fixed to the selection plate 34, and is further provided on the inner arm 27. A pin-shaped engaging body 38 that engages and disengages from the
is formed.

Further, an engaging body 39 having a U-shape in plan view is provided at the lower part of the selection plate 34, and this engaging body 39 engages with and disengages from engaging bodies 31 and 32 formed on the long arm 26.

Reference numeral 40 designates a chain lever guide plate, which is detachably installed on the eave side wall 7a of the fender 7 with a fastener 41 such as a screw or nut, as illustrated in FIG. 40a and a vertical side surface portion 40b, the side surface portion 40b has the shapes shown in FIGS. 3 and 6.
As shown in the figure, a change pattern 42 consisting of a groove or a hole is formed, and an engaging portion 43 provided in the middle of the rod portion of the change lever 37 engages with this pattern 42.

Therefore, as particularly illustrated in FIG. 4, the change lever 37 is provided within the narrow space between the fender 7 and the driver's seat 10.

The change pattern 42 is illustrated in FIG. 3 and FIG. 6, with a pattern 42a for the on/off system for super deceleration at the lowest stage, and a connection path 42b connecting this when the super deceleration is ON to the auxiliary gear shift. 1st and 2nd stage patterns 42c are formed in the middle stage, and 3rd and 4th stage patterns 42e for sub-shifting are formed in the uppermost stage via a connecting path 42d that connects them with super deceleration OFF. It consists of a top pattern 42e and a bottom pattern 42a for creep.
A long hole 34a is formed so that the selection plate 34 can move vertically with respect to the support shaft 22 within the vertical range of the fourth
As shown in the figure, the engaging part 43 of the lever 37 is connected to the lowest pattern 42.
a, the engaging portion 38 of the selection plate 34
is engaged with the U-shaped engagement portion 33 of the short arm 27.

Also, the engaging portion 43 of the lever 37 is arranged in the uppermost pattern 42e.
When the U-shaped engaging portion 39 of the selection plate 34 is engaged with the upper engaging body 31 of the long arm 26, the engaging portion 38 is disengaged from the engaging portion 33. There is.

Thus, as shown in FIG. 6, the upper surface portion 40a of the guide plate 40
A display body 103 in which a vehicle speed display area 100, a main shift display area 101, and a sub-shift display area 102 are respectively displayed in relation to each other is affixed as a display label.

The display body 103 may be stamped on the upper surface 40a of the guide plate 40, or may be attached or stamped on the fender 7.

In addition, in FIG. 3, reference numeral 45 denotes a switch mounting body, which is provided on the holding member 17 in a forward downward position, and an alarm switch 46 is provided on the mounting body 45.

Reference numeral 46a is the switch actuator, which is essentially made of an elastic material, and when it is actuated, a reporting device (not shown) will be activated. to prevent so-called one-sided braking from occurring.

In FIG. 3, reference numeral 47 denotes an auxiliary transmission interlocking body, which is connected to interlock the pivot hole 26a of the long arm 26 and the auxiliary transmission 4, and 48 denotes a super deceleration interlocking body, which supports the short arm 27. The hole 27a and the super deceleration device 5 are interlocked.

Fig. 7 shows the change operation of this embodiment configured as described above.
. It is engaged with the upper engaging body 31.

In this state, when the change lever 37 is operated back and forth around the support shaft 22, the outer arm 26 accompanies it and the sub-transmission device 4 is controlled via the interlocking body 47.

Now, if we show the relationship between this state and the vehicle speed shown in Fig. 6, when the main gear shift lever is in the 1st gear and the auxiliary gear is in the 3rd gear, the operator can easily determine that the vehicle speed is 2Icb in this embodiment. I can judge.

Further, when the sub-shift is in 4 gears and the main gear is in 4 gears, it can be determined that the vehicle speed is approximately 14.51aIt/H.

FIG. 72 shows the 1st and 2nd gears of the sub-shift, which means that the engaging body 43 of the change lever 37 is connected to the connecting path 42 of the pattern.
If the change lever 37 is rotated back and forth around the support shaft 22 with the engaging body 38 of the selection plate 34 engaged with the engaging body 33 of the inner arm 27, the creep Lever 37 within the range of pattern 42a
The engaging body 43 is guided, and the short arm 27 is accompanied by the engaging body 43, and the super-deceleration device 5 is engaged or disconnected via the interlocking body 48 for super-deceleration.

Therefore, when the super deceleration device 5 is kept in contact with the change lever 37 and the change lever 37 is lifted, the engaging body 43 is fitted into the middle pattern 42c, and the engaging body 39 is connected to the engaging body 32 as shown in FIG. engaged as shown.

Therefore, by moving the change lever 37 back and forth, the sub-shift 1
Fig. 6 shows an example of the vehicle speed when the sub-shift is in the first gear and the main gear is in the second gear. , when the sub gear is 2nd gear and the main gear is 4th gear, the vehicle speed is 1.5i.
/H can be displayed or determined.

It should be noted that when the vehicle speed is in a high speed range and the change lever 37 is operated, the switch actuator 46a is turned on and the alarm means is activated, which is advantageous because it can be determined whether or not the brake is engaged.

Further, the change lever 37 can freely move up and down in the lever axial direction within the range of the elongated hole 34a of the selection plate 34, and the operating force of the lever 37 is mutually checked by the frictional force of a pair of resistors 35 and 36. The tightening of the nut 23 is adjusted by torque.

Furthermore, the change lever 37 is connected to the fender 7 and the driver's seat 10.
It can be operated extremely easily from the driver's seat 10.

In this invention, in a passenger tractor with a fender installed on the outside of the seat, a horizontal support shaft is attached to the fixed side between the fender and the lower side of the seat, and an arm is placed on the support shaft to separate the inside and outside. The outer arm has an engaging portion formed below the supporting shaft, and an engaging portion formed above the inner arm above the supporting shaft. A selection plate (selection member) having an engaging portion that can be selectively engaged and disengaged from each of the arms is mounted so as to be vertically movable on a support shaft between the inner and outer arms and rotatable between the support shafts, A change lever is connected to the upper part of the selection member via a bent part, the change lever extends upward between the inner surface of the fender and the seat, and furthermore, an interlocking mechanism is provided on each of the inner and outer arms to interlock with each of the objects to be changed. Since it is characterized by an enlarged body, it has the following advantages.

Even when the gap between the seat and the fender is narrow, the change lever can be installed in a position that is easy to operate on the side of the seat.

In other words, it would be possible to form a retaining part in the direction of the support shaft of the inner arm, and an engagement part below the support shaft of the outer arm, but in this case, in order to avoid negotiation between the inner arm and the change lever, the seat And I have to make the fender clearance bigger.

In addition, the seats must be installed high above the vehicle body, making it difficult to get in and out of the vehicle, and the vertical stroke of the change lever becomes maximum.

In this regard, in the present invention, an engaging part is formed below the spindle of the outer arm, a retaining part is formed above the spindle of the inner arm, and a selection plate is provided that selectively engages and disengages from these engaging parts. Since it is freely movable up and down and rotatable on the support shaft between the inner and outer arms, even if the gap between the seat and the fender is narrow, or the seat does not have to be raised upward, it is possible to create a bent part on the selection plate. There is no interference between the change lever and arm installed through the
Therefore, there is an advantage that the change lever can be operated without having to move it far from the seat, without having to make an unnecessarily large vertical stroke, and the change lever length does not become longer than necessary.

Furthermore, even in a narrow space between the inner surface of the fender and the lower side of the seat, multiple change select mechanisms can be compactly assembled with one change lever, and the select mechanism is protected by the fender and seat. It has the advantage of reducing the risk of failure, and is very useful as it allows remote control of multiple objects to be changed using only one lever.

[Brief explanation of drawings]

Figure 1 is a rear side view of the tractor, Figure 2 is a rear view, and Figure 3 is a rear side view of the tractor.
The figure is a detailed side view of the main part, Figure 4 is a rear view of Figure 3, Figures 5 1 and 2 are a bottom view and side view of the support part, Figure 6 is an enlarged development view showing the change pattern, 7 Figures 1 and 2 are side views showing the gear shifting operation. 1...Vehicle body (mission case), 4...
...Sub-transmission device, 5...Super reduction gear, 10...
····driving seat. 17... Holding member, 22... Support shaft, 2
6, 27...Arm for long and short arms 4, 5, 34...Selection plate, 31.32.33,
3B, 39... Engaging body, 37... Change lever 47, 48... Interlocking body.

Claims (1)

[Scope of utility model registration request] In a passenger tractor with a fender 7 erected on the outside of the seat 10, a horizontal support shaft 22 is attached to the fixed side between the fender 7 and the lower side of the seat 10, and an arm 26 is mounted on the support shaft 22. .27 are rotatably supported around the support shaft 22 in an internal and external manner, and the engaging portions 31 and 32 are below the support shaft 22 of the outer arm 26, and the engaging portions 32 are above the support shaft 22 of the inner arm 27. An engaging portion 33 is formed, and a selection member 34 having engaging portions 38 and 39 that can be selectively engaged and disengaged from each of the engaging portions 31, 32, and 33 is connected to the inner and outer arms 26.
．． A change lever 37 is mounted on a support shaft 26 between 27 so as to be vertically movable and rotatable around the support shaft, and is attached to the selection member 34 via a bent portion. A change lever for a passenger tractor, which is located between the seats 10 and further includes interlocking bodies 47 and 48 that interlock with the objects to be changed 4 and 5 attached to the inner and outer arms 26 and 27, respectively. Device.