JPH10305785A - Cabin elevating and lowering device of tractor or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the maintenance of an equipment on a car body, even if an operating member of a hydraulic system goes wrong, by making it possible to elevate and lower a cabin mounted on a car body by a screw rod which is interlocked by a PTO shaft driven by power of an engine. SOLUTION: A cabin 3 has a bracket 38 at the lower end part of a rear support 26 and connects a pin 39 connected between these left and right brackets 38 and an output shaft 15 interlocking with a PTO shaft 1 by a screw rod 4. When the cabin 3 is elevated, the fixings of brackets 43, 38 are removed, an elevating and lowering transmission case 12 is mounted on a hitch 11, and an output shaft 15 and the bracket 38 are connected by the screw rod 14. The output shaft 15 is revolved by a normal revolution by driving an engine, the screw rod 4 is elongated and the cabin 3 is elevated and rotated around a hinge 35. By making a device have a constitution that the cabin 3 is moved by utilizing revolution power of the engine, maintenance can be performed by moving the cabin 3, even if a hydraulic equipment on a car body goes wrong and a lift arm 17, etc., is not operated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a cabin elevating device mounted on a vehicle having a TO shaft.

[0002]

2. Description of the Related Art
Various sensors, such as tractors, are mounted on the vehicle body below the cabin.
Electric devices such as a controller and hydraulic control valves are arranged. When performing maintenance on these devices, it is necessary to move the cabin to open a place where the devices are arranged. In order to make this maintenance easier, see
There is a technique of opening the maintenance section by tilting the cabin without removing the entire cabin as disclosed in Japanese Patent Publication No. 3 and Japanese Patent Application Laid-Open No. Sho 60-50079. However, in the above-described technology, since the cabin is moved by driving an operating portion of a hydraulic system such as a lift arm, there is a problem that the cabin cannot be moved when there is a failure in the hydraulic system itself.

[0003]

According to the present invention, a cabin 3 mounted on a vehicle body 2 is provided to solve the above-mentioned problems.
Is a cabin elevating device such as a tractor provided to be able to elevate and lower by expansion and contraction of a screw rod 4 interlocked with a PTO shaft 1 driven by the power of an engine.

[0004]

When the maintenance of various devices on the vehicle body 2 is carried out, the PTO shaft 1 which is an operating member of the traveling system driven by the engine is driven, and the cabin is moved up and down by connecting the screw 4 to expand and contract. Since it is configured to move, various devices on the vehicle body can be maintained even if the operating member of the hydraulic system fails as described above.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A tractor body 2 has an engine inside a front bonnet 5, a clutch housing 6 is connected to the rear end of the engine body E, and a transmission case 7 is further connected to the rear. To be integrated. A front axle housing is provided at the front of the vehicle body, and front wheels on both left and right ends can be steered by a steering handle 8. A rear axle housing 9 is provided on both left and right sides of the rear transmission case 7, and rear wheels 1 are provided on both left and right sides.
0 is provided to drive and run by transmitting the rotational power of the engine.

A PTO is provided on the rear side of the transmission case 7.
The shaft 1 protrudes from the engine and is driven from the engine via a forward / reverse rotation clutch, a speed change transmission mechanism, and the like. This PTO shaft 1
A hitch 11 is provided on the side of the PTO shaft 1. An attachment, in particular, an elevating transmission case 12 can be attached and detached with a hitch pin 13. By attaching the elevating transmission case 12, the input shaft 14 can be spline-fitted to the PTO shaft 1 for transmission. it can. The lifting transmission case 12 is provided with an output shaft 15 protruding upward, and is transmitted between the input shaft 14 and the input shaft 14 by a bevel gear 16.

Reference numeral 17 denotes a lift arm, reference numeral 18 denotes a lower link connected to the rear axle housing 9, and reference numeral 19 denotes a lift lot connecting the lift arm 17 and the lower link 18. The cabin 3 that covers the steering section such as the steering handle 8 includes a left and right fender 20 that covers the rear wheel 10, a seat floor 21 formed in a bucket shape between the left and right fenders 20, a step floor 22,
The vehicle has a left and right dashboard 24 covering the front surface on both left and right sides of the steering post 23, a roof, front and rear supports 25 and 26 supporting the roof, a glass door 27, a side glass 28, a front glass 29, a rear glass 30, and the like. A cockpit 31 is mounted on the seat floor 21.

A support frame 34 is provided on a connection plate 32 connecting the engine body E and the clutch housing 6 together with a partition plate 33 for partitioning a front engine room and a rear control section. A pair of left and right hinges 35 is provided on the front side of the cabin 3 at a position above the hood 5.
A support arm 36 protruding forward from 5 is vertically rotatably supported, and the entire cabin 3 can be rotated up and down around the hinge 35. 37 is a fixture for mounting the support frame 34. 44 is a rubber bush.

When the cabin 3 is turned upward, the seat post 21 and the step floor 22 at the bottom of the cabin also turn integrally, so that the steering post 23, the handle 8, and the operating lever It is preferable that the portion which comes into contact with the like and obstructs it can be removed in advance. The cabin 3 has a bracket 38 at a lower end portion of the rear support column 26, and a pin 39 connected between the left and right brackets 38 and an output shaft 15 interlocked with the PTO shaft 1 are connected by a screw 4. . The screw rod 4 includes a screw shaft 40 and a screw cylinder 41 screwed to the screw shaft 40, and the lower end of the screw shaft 40 is spline-fitted to the output shaft 15 via the universal joint 42 so as to interlock. Reference numeral 43 denotes a bracket for supporting and mounting the rear bracket 38 of the cabin 3. The bracket 43 is provided on the left and right rear axle housings 9. When the cabin 3 is set, the bracket 38 is mounted in a supporting position by a fixing tool such as a bolt. When the cabin 3 is rotated upward by attaching the screw 4 or the like, the fixed state of the cabin 3 is released.

When the cabin 3 is lifted, the brackets 43 and 38 are unfixed, and the lift transmission case 1 is lifted.
2 is attached to the hitch 11, and the output shaft 15 and the bracket 3
8 is connected with the screw 4. When the output shaft 15 is rotated in the forward direction by driving the engine by the clutch of the PTO shaft 1 and a speed change operation, the screw 4 is extended, and the cabin 3 is raised and rotated around the front hinge 35. In this way, the upper portion of the transmission case 7 is opened by the elevation of the seat floor 21 of the cabin 3, so that maintenance is easily performed.

When the cabin 3 is lifted and deployed in this manner, the hinge 35 serving as the fulcrum is provided above the bonnet 5, so that the windshield 29 of the cabin 3 is provided.
The hood 5 is hardly obstructed by the portion and the front end of the roof, so that the cabin 3 can be largely raised and rotated to open the space between the bottom and the transmission case 7 widely. Further, when lowering the cabin 3, the PTO shaft 1 is switched in the direction opposite to the direction when the PTO shaft 1 is raised by the speed change operation. The output shaft 15 is reversed and the screw rod 4 is shortened, and the cabin 3 is moved down around the hinge 35.

As described above, since the cabin 3 is moved by using the rotational power of the engine, the cabin 3 can be operated even if the hydraulic system equipment on the vehicle body fails and the lift arm 17 or the like does not operate. 3 can be moved for maintenance. 3 and 4, the difference from the above example is that the arm 45 is rotated by the rear wheel 10 to push up the rail 46 attached to the bracket 38 at the rear of the cabin 3 and to advance the cabin 3 Is to raise the rear part. The arm 45 is mounted inside the left and right rear wheels 10 with bolts and nuts 47. A rail 46 in the front-rear direction is attached to the lower surface of the bracket 38, and front and rear end stoppers 48 and 49 are provided. A guide groove is formed in the rail 46, and an arc-shaped upper edge of the arm 45 is fitted. The arm 45 is integrally rotated with the rear wheel 10 around the axle 50 at an appropriate angle, so that the sliding is performed. The rail 46 and the cabin 3 are pushed up while moving.

Thus, the cabin 3 can be moved by the rotation of the wheels 10 of the traveling system even when each of the hydraulic devices such as the lift arm 17 is out of order. In addition, the connecting plate 32 and the front support 2
A telescopic cylinder 52 is provided between the lower bracket 5 and the bracket 51 by coupling 53 and 54, and the front part of the cabin 3 can be moved up and down by expansion and contraction of the telescopic cylinder 52. When the cabin 3 is moved up and down, the connecting portion 53 or 54 of the telescopic cylinder 52 serves as a fulcrum at the front, and the support for the arm 45 of the rail 46 serves as a fulcrum at the rear.

[Brief description of the drawings]

FIG. 1 is a side view of a part of a tractor and an enlarged side sectional view of the part.

FIG. 2 is a rear view of a clutch housing portion and a cross-sectional view of a part thereof.

FIG. 3 is a side view of a tractor showing a partially different embodiment.

FIG. 4 is a rear view of a rear wheel portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 PTO shaft 2 Body 3 Cabin 4 Screw rod

Claims (1)

[Claims] 1. A cabin 3 mounted on a vehicle body 2 is threaded by a PTO shaft 1 driven by engine power.
Cabin elevating device such as a tractor that can be raised and lowered by expansion and contraction.