JPH0730424Y2 - Work vehicle driver seat mounting structure - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention allows a seat-side seat mounting member mounted on a driver's seat to be freely rotatable around a longitudinal axis with respect to a body-side seat mounting member mounted on a vehicle body upper surface. And a ball bearing is provided between the seat side seat mounting member and the vehicle body side seat mounting member while being positioned between the lower surface of the seat side seat mounting member and the upper surface of the vehicle body. The present invention relates to a driver's seat mounting structure for a work vehicle that enables the driver's seat orientation to be changed.

[Conventional technology]

In the above work vehicle, conventionally, as shown in FIG. 5, the seat side seat mounting member (9) is supported only by the ball bearing (12) and the vehicle body side seat mounting member (11) by the vehicle body upper surface (10). The following inconveniences have been made.

[Problems to be solved by the device]

That is, if the degree of rattling of the driver's seat (5) due to the shape of parts in the pivot structure of the seat side seat attachment member (9) to the vehicle body side seat attachment member (11) and the pivot joint flexibility is to be minimized, It is necessary to increase the diameter of the ball bearing (12) so that the span (S1) for supporting the seat side seat mounting member (9) by the vehicle body side seat mounting member (11) is large. As a result, not only is the bearing purchasing cost high and the manufacturing cost high, but also the vertical size of the ball bearing is large and the installation height of the driver's seat is high.

An object of the present invention is to reduce the degree of rattling of the driver's seat as much as possible, and to modify the ball bearing so that it can be used with a small diameter.

[Means for Solving the Problems]

The characteristic configuration of the present invention is that the seat side seat mounting member mounted on the driver's seat is pivotally attached to the vehicle body side seat mounting member mounted on the upper surface of the vehicle body so as to be rotatable about the longitudinal axis, and the seat side seat mounting member is mounted. In a driving seat mounting structure for a working vehicle, in which a ball bearing is provided between the seat side seat mounting member and the vehicle body side seat mounting member while being positioned between the lower surface of the member and the upper surface of the vehicle body, A plurality of support members for receiving the outer peripheral side portion of the seat mounting member located outside the ball bearing by the vehicle body upper surface or the vehicle body side seat mounting member are dispersedly arranged in the circumferential direction of the ball bearing, and the vehicle body upper surface. Alternatively, it is attached to the vehicle body side seat mounting member, and an engaging portion is provided at a plurality of circumferential positions on an outer peripheral portion of a supporting portion of the vehicle body side seat mounting member, and A lock plate extending outward from the attachment position of the holding member is attached, and a lock tool that is engageable with and disengageable from the engaging portion of the lock plate is attached to the seat-side seat attachment member to perform the operation. The seat is configured to be fixed in a desired orientation, and further, on the lower surface of the seat side seat mounting member,
In the state where the driver's seat is locked in the desired direction, another plurality of support members facing each other in a state of sandwiching the lock plate between the plurality of support members are provided, and the action and effect thereof are It is as follows.

[Action]

Even if the diameter of the ball bearing is reduced and the span at which the seat-side seat mounting member is supported at the pivot point of the vehicle body-side seat mounting member is reduced, a plurality of support members are arranged in the circumferential direction of the outer periphery of the ball bearing. The seat-side seat attachment member is supported by the upper and lower support members and the lock plate with a span that is dispersed and is larger than the span of the pivot point.

[Effect of device]

By supporting the seat side seat mounting member with a large span due to the plurality of supporting members, the degree of rattling of the driver's seat can be minimized to enable stable seating and safe driving. The bearing can be made as small as possible, making it cheaper to manufacture, and the installation level of the driver's seat can be made as low as possible to stabilize it.

Moreover, since the lock plate attached to the supporting portion of the vehicle body side seat mounting member is sandwiched between the upper supporting member and the lower supporting member to support the seat load, the seat fixing lock plate is used. Although it can be used as a support member for supporting a load, the lock plate can be prevented from bending and deforming, for example, as compared with a support member supporting a seat load by eliminating the lower support member, and thus making the lock plate thinner and lighter. Be peeled off.

〔Example〕

 Next, examples will be shown.

As shown in FIG. 4, a front vehicle body having front wheels (1) and a shovel device (2), a rear wheel (3), a driving part provided with an engine bonnet (4), and an engine bonnet are arranged. Driver's seat (5), backhoe device (6)
And a rear vehicle body having a steering cylinder (7) so as to relatively swing about a vertical axis (X).
Thus, a wheel type shovel loader with a backhoe is configured by swinging the front vehicle body with respect to the rear vehicle body to steer the vehicle body.

1 and 2 so that the driver's seat (5) can be turned to a forward-facing posture for excavator work and a rearward-facing posture for backhoe work by a rotating operation around a vertical axis (Y).
Engine bonnet (4) based on the mounting structure shown
It is attached to.

That is, the mounting shaft portion (9a) protruding to the lower surface side of the plate-type seat side seat mounting member (9) mounted on the driver seat (5) via the cushion device (8a) and the slant device (8b) is attached to the engine. A ball bearing (1a) is attached to a support portion (11a) projecting to the upper surface side of a plate type bonnet side seat mounting member (11) bolted to the bonnet upper surface (10).
The seat side seat mounting member (9) is rotated around the vertical axis (Y) by being internally fitted through the ball bearing (12) and the pivot structure. It is pivotally attached to the bonnet side seat mounting member (11) so as to be located between the lower surface of the side seat mounting member (9) and the engine bonnet upper surface (10).

Then, the lock member (14) is attached to the lower surface side of the seat side seat attachment member (9) via the attachment member (13) so as to swing up and down around the axis (Z), and the support tubular portion ( 11a)
A disk-shaped stopper (15) as a lock plate is attached to the lock mechanism for fixing the driver's seat (5) in a forward posture or a backward posture. That is, the lock urging spring (17) that is acted on the lock release lever (16) that also serves as the rotation support shaft of the lock (14) causes the lock (14) to move into the first notch (15a) of the stopper (15). ) Or the second notch (15b), and the lock tool (14) is operated when the fixture (13) is operated in an ascending state of contacting the connecting plate portion (13a) with respect to the seat side seat attachment member (9). The seat side seat mounting member (9) is locked by abutting the stopper (15) with the seat side seat mounting member (9). Then, when the lock release lever (16) is raised and rocked from the lock position (ON) to the release position (OFF), the lock tool (14) separates from the stopper (15) and descends to descend the seat side seat mounting member (9). The lock is released to enable the rotation of the.

Four sheet metal supporting members (18), (18) or (19), (19) for the seat side seat mounting member (9) are provided on the upper surface side of the bonnet side seat mounting member (11) with a ball bearing (1
The driver's seat (5), which is distributed around the circumference of 2) and attached
The bonnet side seat mounting member (11) is configured to be supported in a state where the degree of rattling of the driver seat (5) is small relative to the diameter of the ball bearing (12).

That is, four support members (18), (18), (19),
(19) Each of them is formed by forming the connecting plate portion (13a) or the plate body (20) attached to the lower surface side of the seat side seat mounting member (9) due to its installation location and vertical size. An outer peripheral side portion (P1) or (P2) or (P3) located outside the ball bearing (12) of the seat side seat mounting member (9) by abutting action on a certain actuated portion through the stopper (15) ) Or (P4) to the bonnet side seat mounting member (11)
So that it is received and supported by the seat side seat mounting member (9) on the outer peripheral side (P
1) or (P2) or (P3) or (P4), and the height (H1) with respect to the engine bonnet upper surface (10) when the support member (18) or (19) acts, the bonnet side seat The height (H2) with respect to the upper surface (10) of the engine bonnet at the location where it is pivotally attached to the mounting member (11) is substantially equal to the height (H2−H1 = 0.5 mm). That is, the seat side seat mounting member (9) is supported by the bonnet side seat mounting member (11) at the pivot point, and in addition, the support span (S1) determined by the diameter of the ball bearing (12) at the pivot point. ) Is larger than the supporting span (S2), the outer peripheral side portion (P1) or (P2) or (P3) or (P4).

Of the four support members (18), (18), (19), (19), the ones (18) located on the front and rear sides of the driver's seat (5) in the forward facing posture and the backward facing posture are in the downward unlocking posture. The driver's seat (5) is arranged so as to be in contact with a certain lock (14) and to be set in a forward or rearward posture. That is, it also serves as a stopper for setting the posture.

[Another embodiment]

The driver seat (5) may be attached to the upper surface of the engine bonnet (10), the upper surface of various device covers, or the like. Therefore, the engine bonnet upper surface (10) is referred to as the vehicle body upper surface (10), and the bonnet side seat attachment member (1
1) is referred to as a vehicle body side seat attachment member (11).

The support members (18) and (19) are attached to the seat side seat attachment member (9), or the engine bonnet upper surface (1
It may be carried out by attaching to 0).

It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the present invention is not limited to the structure of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 shows an embodiment of a structure for mounting a driver's seat of a work vehicle according to the present invention, and FIG. 1 is a partially cutaway side view of a driver's seat mounting portion,
FIG. 2 is a partially cutaway plan view of the driver seat mounting portion, FIG. 3 is a partially cutaway front view of the driver seat mounting portion, and FIG. 4 is a side view of the entire shovel loader with a backhoe. FIG. 5 is a partially cutaway front view of a conventional seat mounting portion. (5) …… Operating seat, (9) …… Seat side seat mounting member, (10) …… Vehicle body upper surface, (11) …… Vehicle side seat mounting member, (11a) …… Supporting part, (12) …… Ball bearing, (14) …… Locking tool, (15) …… Lock plate, (1
8), (19) ... Supporting member, (13a), (20) ... Supporting member, (Y) ... Vertical axis.

Claims (1)

[Scope of utility model registration request] 1. A seat side seat mounting member (9) mounted on a driver's seat (5) is rotated around a vertical axis (Y) to a vehicle body side seat mounting member (11) mounted on a vehicle body upper surface (10). A ball bearing (12) is rotatably pivotally mounted and is positioned between the lower surface of the seat side seat mounting member (9) and the vehicle body upper surface (10), and the seat side seat mounting member (9). A driving seat mounting structure for a working vehicle provided between the seat mounting member (11) and the vehicle body side seat mounting member (11), the outer peripheral side being located outside the ball bearing (12) of the seat side seat mounting member (9). The ball bearing (1) is provided with a plurality of support members (18 or 19) for receiving the location (P1 or P2 or P3 or P4) by the vehicle body upper surface (10) or the vehicle body side seat mounting member (11).
2) distributed in the circumferential direction and attached to the vehicle body upper surface (10) or the vehicle body side seat mounting member (11), and the outer peripheral portion of the support cylinder portion (11a) of the vehicle body side seat mounting member (11). A lock plate (15) having engaging portions (15a) at a plurality of positions in the circumferential direction and extending to the outside of the attachment position of the support member (18 or 19). A lock tool (14) that can be engaged with and disengaged from an engagement portion (15a) of a lock plate (15) is attached to the seat side seat attachment member (9) so that the driver's seat (5) can be fixed in a desired direction. Further, the lock plate is provided between the plurality of support members (18 or 19) on the lower surface of the seat side seat attachment member (9) in a desired locked state of the driver seat (5). (15)
A plurality of other support members (13
a or 20) Work vehicle mounting structure for work vehicles.