JP2538174Y2 - Operation lever device for turning type work vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to an operation lever device in a turning type work vehicle.

(Problems to be Solved by Conventional Techniques and Inventions) In a micro-slewing type backhoe, a swivel is provided on a crawler type traveling device so as to be swivelable about a vertical axis, and an operating unit is provided on a left side of the swivel. In some cases, a work device is provided at the center of the revolving base in the left-right direction.

In the above backhoe, the working device is in a substantially vertical posture,
If the turntable is turned, the working device does not go outside the traveling device in plan view, and the turntable can be turned even in a narrow place.

By the way, when the driving section is provided with a pair of left and right operation levers for a working device, for example, as shown in FIGS. The operation lever 44 is located above the lever post 43.
May be provided.

As described above, when a pair of left and right lever posts 43 is provided on the upper surface of the swivel table 42, if the distance between the lever posts 43 is increased, the driver's feet on the seat 45 are held between the lever posts 43. Because of this, it is just convenient.

However, the driving unit is located at a relatively small place on the left side of the swivel base 42 and its width is small, so that both lever posts 43
Can not be too large.

For this reason, the driver's feet cannot be put between the lever posts 43, and there is a problem that the feet of the driver are narrow.

In order to solve the above problem, as shown in FIG. 9, a single lever post 43 is provided, and the single lever post 43 is provided with a pair of left and right operation levers 44. It is conceivable to bring the driver's feet to the vehicle.

By the way, above the lever post 43, the operation lever 44
The width of the lever post 43 cannot be reduced because a pilot valve, a link, and the like operated by the lever post are provided. However, in the related art, the lower portion of the lever post 43 has the same width as the upper portion.

For this reason, the driver's feet are still narrow.

Further, in any of the above, there is also a problem that the lower part of the lever post 43 becomes a large obstacle to the field of view of the driver obliquely downward and forward, and the field of view is poor.

An object of the present invention is to provide an operation lever device in a turning type work vehicle that can solve the above problem.

(Means for Solving the Problems) In order to solve the above problems, a means adopted by the present invention is that a swivel is provided on a traveling device so as to be swivelable about a vertical axis, and an operating unit is provided on the swivel. Working devices are arranged side by side in the left and right direction, a lever post is erected at the front of the driving section, and a plurality of operating levers are provided on the lever post. In other words, the width of the lower part is smaller than that of the upper part, the lower part of the lever post is made vertical, and the middle part in the vertical direction is made inclined backward.

The lower part of the lever post may be provided on the front of the swivel base.

Further, the lever post may be freely adjustable in the front-rear direction.

(Operation) Since the lever post is made single and the width of the lower part is narrower than that of the upper part, the driver on the seat can move both legs in the left and right direction despite the multiple operation levers being arranged side by side. Can be brought to the outside of the lever post, so that the foot is wide and the field of view obliquely downward and forward is also good.

(Embodiment) An embodiment in which the present invention is applied to a micro-swirl type backhoe will be described below with reference to FIGS. 1 to 6. FIGS. 4 and 5 show a micro-swirl type backhoe. The backhoe includes a crawler-type traveling device 2 having a pair of right and left crawlers 1, a swivel 3 provided on the traveling device 2 so as to be rotatable around a vertical axis, and an operation provided on a left side of the swivel 3. A work unit 5 provided at the center in the left-right direction of the swivel 3, an engine 6 provided at the rear of the swivel 3,
It has an earth removal plate 7 disposed in front of the traveling device 2.

The working device 5 includes a boom 9 pivotally supported by the swivel table 3 and raised and lowered by a boom cylinder 8, an arm 11 pivotally supported by a tip of the boom 9 and rotated by an arm cylinder 10, and pivotally supported by a tip of the arm 11. And a bucket 13 rotated by a bucket cylinder 12.

In the above backhoe, as shown in FIG.
By turning the boom 9 into a substantially vertical posture and making the arm 11 close to the boom 9 at the time of turning, the working device 5 does not go outside than the traveling device 2 and is narrower in plan view. The swivel 3 can be swung even at a place.

The driving section 4 has a cabin 15 and a seat 16 provided at the rear of the cabin 15.

As shown in FIGS. 1 to 3, a mounting bracket 17 is fixed to the left side of the front surface of the swivel 3 so as to protrude upward. The mounting bracket 17 has a U shape in plan view.

19 is a single lever post, which is hollow and square,
The lower part of the lever post 19 is externally fitted to the upper and lower side plates of the mounting bracket 17 and is pivotally connected by a horizontal support shaft 20 so that the lever post 19 is rotatable around the support shaft 20 in the front-rear direction.

As shown in FIG. 6, a fixing nut 22 is fixed to the upper inner surface of the left side plate of the mounting bracket 17.
, A fixing bolt 23 is screwed.

The fixing bolt 23 is inserted through the left side plate of the mounting bracket 17 and is movably inserted in the long hole 25 of the left side plate of the lever post 19 in the longitudinal direction thereof. The long hole 25 is formed in an arc shape centering on the support shaft 20.

A washer 27 is externally fitted on the fixing bolt 23 outside the lever post 19, and a lever boss 28 is externally fitted non-rotatably and is prevented from coming off by a retaining bolt 29.

A fixing lever 31 projects upward from the lever boss 28. By turning the fixing lever 31, the fixing bolt 23 and the fixing nut 22 are fastened and released, and the lever post 19 is moved to a desired turning position. Can be fixed.

In addition, multiple screws are formed on the outer peripheral surface of the fixed nut 22 and the inner peripheral surface of the fixed nut 22, and the above-mentioned fastening and release thereof can be performed by a slight rotation operation of the fixed lever 31. I have.

The lower width of the lever post 19 is smaller than the upper width. The lower part of the lever post 19 has a vertical shape, the middle part in the vertical direction is inclined backward, and the upper part is vertical.

In the upper part of the lever post 19, a pair of left and right pilot valves 33 for operating the working device 5, the swivel 3 and the traveling device 2 is provided. In this case, since the width of the upper portion of the lever post 19 is widened, there is no problem in terms of space regarding the interior of the pair of left and right pilot valves 33.

Reference numeral 35 denotes a hydraulic hose, which is passed through the lower part of the lever post 19. Although the width of the lower portion of the lever post 19 is smaller than the width of the upper portion, there is no problem in the lower portion since the hydraulic hose 35 is only passed through the end.

Reference numeral 37 denotes a pair of left and right operation levers, which protrude upward from the lever posts 19. The operating lever 37 operates the pilot valve 33 by tilting it back and forth, left and right, and its upper part is bent rearward, and is arranged near the driver on the seat 16, and its lower part is Rubber boots
Covered by 38.

Note that the imaginary line in FIG. 3 shows the locus of the outermost portion when the swivel 3 turns, and the lever post 19 and the mounting bracket 17 are disposed inside the locus.

By the way, since the mounting bracket 17 is mounted on the front surface of the swivel 3, the mounting bracket 17 and the lever post
The lower part of 19 will project forward from the swivel 3,
The lower width of the lever post 19 is narrower than the upper width,
Correspondingly, since the width of the mounting bracket 17 is also narrow, the lower part of the lever post 19 and the mounting bracket 17 can be easily arranged inside the above-mentioned locus of the swivel 3.

According to the embodiment configured as described above, the lever post
Since the width of the lower part is smaller than the width of the upper part as a single unit 19, the driver on the seat 16 holds both feet in the left and right direction even though the pair of left and right operation levers 37 are arranged side by side in the left and right direction. It can be brought to the outside of the lever post 19, and the foot is wide, and the visibility of the front diagonally lower side is also good.

In particular, a mounting bracket 17 is fixed to the front surface of the swivel 3 so as to protrude upward, a lower portion of the lever post 19 is mounted on an upper portion of the mounting bracket 17, and a lower portion of the lever post 19 is formed vertically. The driver's feet are much wider.

In addition, since the middle part in the vertical direction of the lever post 19 is inclined backward, the operation lever 37 can be arranged near the driver,
The operability of the operation lever 37 can be improved.

Furthermore, since the lever post 19 can be adjusted to rotate in the front-rear direction, the lever post 19 can be adjusted to rotate in the front-rear direction according to the driver's body shape, and the operation of the operation lever 37 can be performed regardless of the driver's body shape. As a result, the operation lever 37 can be easily operated by rotating the lever post 19 forward even when the driver leans out of the seat 16 and operates the operation lever 37.

In the embodiment, the left and right operation levers are paired, but three or more operation levers may be used.

In the embodiment, the present invention is suitable for a backhoe, but the present invention can be applied to other turning type work vehicles.

(Effects of the Invention) As described in detail above, according to the present invention, the lever post is made single and the width of the lower portion is made smaller than the width of the upper portion, so that a plurality of operation levers are arranged side by side in the left-right direction. Nevertheless, the driver on the seat can bring both feet to the outside of the lever post with respect to the left-right direction, so that the feet are wide and the field of view obliquely downward and forward is good.

In addition, the lower part of the lever post is made vertical, so that the driver's feet can be further widened, and the middle part of the lever post in the vertical direction is inclined backward, so that the operating lever can be placed near the driver's hand. The operability of the operation lever can be improved.

Further, if the lower part of the lever post is provided on the front surface of the swivel base as in claim 2, the driver's feet can be further widened.

Furthermore, if the lever post is freely adjustable in the front-rear direction as in claim 3, the lever post can be adjusted in the front-rear direction in accordance with the driver's body shape, regardless of the driver's body shape. The operability of the operation lever can be improved, and even when the driver leans out of the seat and operates the operation lever, the operation lever can be easily operated by rotating the lever post forward.

[Brief description of the drawings]

1 to 6 show an embodiment of the present invention. FIG. 1 is a partially sectional front view of a main part, FIG. 2 is a side view thereof, FIG. 3 is a plan view thereof, and FIG. 5 is a simplified plan view of the same, FIG. 6 is a cross-sectional view taken along the line AA of FIG. 2, FIG. 7 and FIG. 8 show an example of the prior art, and FIG. FIG. 8 is a side view of the same, and FIG. 9 is a front view of a main part showing another example of the conventional art. 2. Crawler type traveling device, 3 .... turntable, 4 .... driving unit, 5 ... working device, 16 ... seat, 17 ... mounting bracket, 19 ... lever post, 20 ... support shaft, 22 ... fixing nut, 23 ... fixing bolt, 31 ... fixing lever, 3 ... operation lever.

Claims (3)

(57) [Scope of request for utility model registration] 1. A swivel is provided on a traveling device so as to be swivelable about a vertical axis, an operating unit and a working device are arranged side by side on the swivel, and a lever post stands upright in front of the operating unit. Established
There are multiple operation levers provided on the lever post,
In the side-by-side arrangement, the lever post is made unitary, the lower part of the lever post is narrower than the upper part, the lower part of the lever post is made vertical, and the middle part in the vertical direction is inclined backward An operation lever device for a turning-type work vehicle, characterized in that: 2. The operating lever device according to claim 1, wherein a lower portion of the lever post is provided on a front surface of the swivel table. 3. The operation lever device according to claim 1, wherein the lever post is freely rotatable in the front-rear direction.