JPH082057Y2 - Cab tilting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a tilting device for a driver's cab of a truck, that is, a cavitating device.

[Conventional technology]

The engine of the truck is installed below the cab that is tiltably supported at the front of the vehicle.The front end of the truck is pivotally attached to the vehicle body for inspection and maintenance of the engine and various devices such as steering devices. The rear part of the cab is raised and tilted. Examples of the cabin inclining device include a device in which a cylinder device is arranged between the lower surface of the cabin and the vehicle body to push it up, and a device in which an arm provided between the vehicle body and the cabin is raised and lowered by the cylinder device.

[Problems to be solved by the invention]

On the other hand, there are two types of cabs, one having a seat for three persons: a single cab, and the other having a seat further behind the seat: a double cab. The former is used for ordinary trucks with a small number of passengers, and the latter is used for trucks with many passengers such as fire trucks.

In the case of a single cab, since the cab is relatively lightweight, it may be manually tilted or a small cylinder device may be used. However, in the case of the double cab, its length is long, and another storage box (commonly known as a school bag) is arranged at the rear of the cab, so that the weight of the rear of the cab may be loaded.

The present invention relates to an improvement of a tilting device mainly used for a double cab or a cab having a long front-rear direction. In the case of this tablable cab, the single cab cannot be tilted unless power is used. With a device similar to that used in the above, it is impossible at all to tilt the cabin by a predetermined angle.

As described above, since the double cab has a considerably long length, when the cylinder device 3 is arranged between the center portion of the lower surface of the cab 1 and the vehicle body 2 as shown in FIG. Due to the strength of the cylinder device 3, the cylinder device 3 is easily deformed into a V shape, and in order to eliminate this defect, it is necessary to improve the strength of the cabin.

Further, since the extending length of the cylinder device 3 is longer in the case of the double cab than in the case of the single cab,
Cylinder devices that are normally used cannot be used and require a considerable telescoping length. Specifically, as shown in FIG. 7, a cylinder device 3 that extends in two or three stages into a bamboo shoot is required. Since the cylinder device 3 having this special structure is specially designed and manufactured, it is significantly more expensive than the standard cylinder device. Note that FIG. 7 shows an example in which a storage box 4 is provided at the rear of the cabin 1. In the case of a fire engine, the storage box 4 stores a digestion facility such as an oxygen cylinder.

FIG. 8 shows an example of a cab tilting device using the single cylinder type cylinder device 3a previously developed by the present applicant, in which the other end of the arm 6 pivotally supported at one end on the vehicle body 2 is attached to the cab 1. On the rear surface, which is on the rail 5 provided in the longitudinal direction, is the arm 6
It is configured to guide through a roller 6a provided at the tip of the.

However, it is necessary to lengthen the arm 6 in order to increase the inclination angle θ in this device. Then, the length of the rail 5 must be sufficiently long corresponding to the length of the arm 6. However, if the length of the arm 6 is lengthened, it is necessary to extend the tip portion 5'of the rail 5 that guides one end of the arm 6. The tip 5'of this rail 5
When this is extended, this portion is extended to the side of the steering wheel 7 and the working space is reduced, so that the inspection / maintenability of the vehicle is significantly impaired.

The inclination angle θ of the cabin 1 is important for improving the maintainability of the vehicle, and it goes without saying that the larger the inclination angle θ, the better the maintainability. This tilt angle θ is usually about 45 ° in the case of a single cab, but the tilt angle θ in the case of a double cab as shown in FIGS. 7 and 8 is much smaller than the above, and is about 25 °, which is extremely small. Therefore, there is a problem that maintainability is poor.

Further, when the bamboo shoot-shaped multi-stage telescopic type cylinder device 3 is used as in the example of FIG. 7, it is necessary to prepare a specially manufactured one and the structure is complicated, which is extremely expensive. However, there is a drawback in that the cost of the installation is naturally high.

The present invention has been made to solve the disadvantages of the tilting device for a large cab, and provides a device for tilting a large cab with a large tilt angle using a normal cylinder device. The purpose is to do.

[Means for solving the problem]

In order to achieve the above-mentioned object, a cabin tilting device according to the present invention comprises a rail fixed on the vehicle body in the longitudinal direction of the rear surface of the cabin whose front portion is pivotally supported, and one end on the rear side of the cabin pivoted on the vehicle body. An arm that is supported, the other end of which extends beyond the front end of the rail, is accommodated in the rail in parallel with the rail and is engageable with the rail, and one end of which is pivotally supported at an intermediate portion of the arm, The other end is composed of a cylinder device pivotally supported by the vehicle body, and the tip of the arm is configured to move while being guided by the rail while supporting the rail when the inclination angle of the cabin increases in a certain range. There is.

[Action]

When the inclination angle of the cabin is small, a roller provided at the tip of the rail is supported by the support surface of the arm. When the tilt angle further increases, the roller provided at the tip of the arm rolls on the support surface of the rail to tilt the cabin. Then, by making the length of this arm projecting longer than the tip of the rail, the arc drawn by this arm can be made larger, and the cabin can be greatly tilted accordingly.

In addition, for example, when the length of the arm is short and the tip is within the range of the length of the rail as shown in FIG.
Even if the arm rotates and pushes up the rail, it is not possible to incline the cab relatively to the angle of the rotation, but the present invention solves this drawback.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a conceptual diagram of a cab tilting device according to the present invention, in which a front portion of the cab 1 is supported by a fulcrum 10 (a rotation center or a tilt center of the cab 1).
Two rails 11 are mounted in parallel in the front-rear direction on both sides of the back surface of the casing 1 which is pivotally mounted on the top.

A long arm 12 is pivotally mounted on the vehicle body 2 beyond the tip of the rail 11 so as to be folded over the rail 11 and a rear end thereof is supported by a fulcrum 13. Further, a lower end of the arm 12 is pivotally mounted on the vehicle body 2 by a fulcrum 14, and an upper end of a cylinder device 15 is pivotally supported by a fulcrum 16.

Further, rollers 17 and 18 are provided at the tip of the arm 12 and the tip of the rail 11, respectively, so that the tilt angle θ can be smoothly changed while the arm 12 is guided by the rail 11 when the cabin 1 is tilted. Has been done.

2 and 3 show an example of the relationship between the rail 11 and the arm 12, wherein the rail 11 has a U-shaped cross section, and the arm 12 having the U-shaped cross section is housed on the inner surface thereof. Is
It is configured to be guided.

A roller 18 is provided at the tip of the rail 11 so as to project a peripheral surface 18a that is equal to or slightly below the support surface 11a. A roller 17 is also provided at the tip of the arm 12, and a peripheral surface 17a of the roller 17 is provided so as to coincide with or slightly protrude from the support surface 12a which is the upper surface of the arm 12.

If the tilt angle θ of the cabin 1 is small, the cylinder device 15
The rail 18 provided at the tip of the rail 11 rotates on the support surface 12a as the arm 12 inclines due to the extension.
When the inclination angle θ of the arm 12 becomes large and the roller 17 at the tip of the arm 12 enters the range of the rail 11, both rollers 17 and 18 are aligned with each other, and in the next stroke, the roller 17 is moved to the rail.
It is configured to be guided on the support surface 11a of 11.

Further, as shown in FIG. 1, an auxiliary supporting device 19a is provided in the vicinity of the free end of the arm 12, and a supporting device 19 is provided at the rear portion of the cabin 1, respectively. The lowest position of 12 is held so that a part of the weight of the cabin 1 is borne in the housed state of the cabin 1.

In FIG. 1, the distance: L ₁ indicates the distance between the fulcrum 10 which is the tilt center of the cabin 1 and the point of application of the force P associated with the weight of the cabin 1, and the distance: L ₂ is The distance between the fulcrum 13 formed at one end of the arm 12 and the center of the roller 15 provided at the tip thereof is shown. And the distance: L ₃ represents the distance between the roller 18 provided at the front tip of the fulcrum 13 and the rail 11 of the arm 12, respectively. Further, the distance: 1 indicates the length of the arm 12 protruding from the tip of the rail 11, and this distance: 1 is the arm portion for inclining the cabin 1 largely. Further, the long arm 12 is retracted from below the cabin 1 in a state where the cabin 1 is inclined, and a large working space is formed below the cabin 1.

Next, the operation of the cabin tilting device according to the present invention will be described.

FIG. 4 shows the relationship between the cylinder device 15, the arm 12 and the rail 11 in the housed state of the cabin 1 (the running state of the vehicle) similar to that shown in FIG. However, the rail 11 and the arm 12 are in a state of being parallel or close to each other, and the tip of the arm 12 is supported by the auxiliary supporting device 19a.

The weight of the cab 1 is largely supported by the fulcrum 10 and the supporting device 19 in FIG. 1, and a part of the weight acts on the arm 12 via the roller 18.

When tilting the cabin 1, when oil is supplied to the cylinder device 15 to extend the piston rod 15a, the arm 12 gradually rises and the supporting surface 12a of the arm 12 is lifted.
It is possible to push up the roller 18 supported by the carriage 1 and raise the casing 1.

During the operation, the roller 17 provided at the tip of the arm 12 gradually moves in the direction of the roller 18 in front of the rail 11 (moves by the distance l in FIG. 1) and finally as shown in FIG.
17 and roller 18 match. From this state, the roller 17 moves on the support surface 11a of the rail 11, and the arm 12 rotates within the range of the length of the rail 11.

FIG. 6 shows a state in which the cabin 1 is tilted at a predetermined tilt angle θ. In this state, the distance in Figure 1 is: l
Since the arm 12 lengthened by the length is raised by the cylinder device 15 and the rail 11 is pushed up via the roller 17 at the tip of the arm device 12, the cabinet 1 can be greatly tilted.

[Effect of device]

The cabin tilting device according to the present invention is a rail fixed in the longitudinal direction of the rear surface of the cabin 1 whose front portion is pivotally supported 10 on the vehicle body 2.
11 and an arm 12 having one end pivotally supported on the vehicle body 2 on the rear side of the cabin 1 and the other end extending beyond the front end of the rail 11 and housed in a folded state with respect to the rail 11. , A cylinder device 15, one end of which is pivotally supported at the middle portion of the arm 12 and the other end of which is pivotally supported by the vehicle body 2. The tip of the arm 12 is the above when the inclination angle of the cabin 1 increases within a certain range. It is configured to move while supporting the rail 11, and the following effects can be obtained.

Since a long arm 12 is used whose tip extends beyond the tip of the rail 11 by a length l, when the tilt angle of the cabin is small, the support surface 12a of the arm 12 causes the cabin 1 to move.
I support.

Then, the arm 12 stands up and the supporting surface 11a of the rail 11
When the roller 17 at the tip of the arm 12 moves within the range of 1, the long arm 12 lifts the cabin 1 via the rail 11. Therefore, due to the length of the arm 12, it is possible to tilt the cabin at a large tilt angle while using the normal cylinder device 15.

Further, since the cylinder device 15 is a single-stage normal device, its manufacturing cost is low.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a conceptual view of a cab tilting device according to the present invention, FIG. 2 is a front view showing a relationship between a rail and an arm, and FIG. Is a side view thereof. 4 to 6 are explanatory views of the operating state of the cam tilting device according to the present invention. FIG. 7 and FIG. 8 are views showing an example of a conventional cam tilting device. 1 ... Cab, 2 ... Car body 3, 3a ... Cylinder device 5 ... Rail 6 ... Arm, 10 ... Support point 11 ... Rail, 11a ... Support surface 12 ... Arm, 12a ... Support surface 13 …… Support point, 14 …… Support point 17,18 …… Laura.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location F16H 21/44 F 9242-3J

Claims (1)

[Scope of utility model registration request] 1. A rail fixed in the longitudinal direction of the back surface of a cabinet whose front portion is pivotally supported on the vehicle body, one end of which is pivotally supported on the vehicle body at the rear side of the cabin and the other end of which is the front end of the rail. An arm that extends beyond and can be stored in a folded state in parallel with the rail and is engaged with the rail, and a cylinder whose one end is pivotally supported at the intermediate portion of the arm and the other end is pivotally supported at the vehicle body. A device for tilting a cab, wherein the tip of the arm is configured to move while being guided by the rail while supporting the rail when the tilt angle of the cab increases in a certain range.