JPS6332057Y2 - - Google Patents

Description

[Detailed description of the invention] <Technical classification/field> The disclosed technology belongs to the technical field of a tilt cab mechanism that advances the cab of a cab over truck.

<Explanation of the gist> This invention relates to a tilt cab device in which the cab is rotated via a hinge at the front end of the chassis of the cab over truck so that the cab can be lifted forward. A sleeve is interposed between a predetermined position of the chassis of the cab over truck and a predetermined position of the lower part of the cab, and a guide sleeve having one side of the chassis installed therein is interposed, and the guide sleeve is provided within the guide sleeve. A torsion spring is freely pressed and pressed against one end of the sleeve through a plunger with a ratchet, and a guide pin extending laterally at one end of the sleeve communicates with the plunger. Relating to a tilt cab device, which is inserted into a hole to prevent displacement of the sleeve and the plunger in the rotational direction, and further allows a pawl provided on the guide sleeve and linked to the release knob to engage and separate from the ratchet of the plunger. It is an idea.

<Prior Art> As is well known, cab over trucks are generally equipped with a so-called tilt mechanism that tilts forward the cab that covers the engine room in order to improve the maintainability of the engine and the like.

Accordingly, in the conventional embodiment shown in FIG. The cab 2 is operated by lifting it forward, but in order to reduce the operating load, a coil spring or a toyon spring (not shown) is installed at a predetermined position on the chassis 3 to lift the cab 2 forward. I try to always push it upwards.

<Problems with the Prior Art> However, this type of tilt mechanism does not only lift the cab 2 forward when the cab over truck 1 is stopped to perform maintenance on the engine, etc., but also lifts the cab 2 forward when the cab over truck 1 is stopped. Since the spring reaction force of each of the springs is always applied to the cab 2, a force that tries to lift the cab 2 forward is constantly applied, causing the cab 2 to vibrate, resulting in an inconvenience in which the ride comfort for the occupants is impaired. Ta.

Furthermore, even when the cab 2 does not need to be tilted, the biasing reaction force of the spring is applied to the predetermined support portion of the cab 2 as described above, so that local wear occurs on the support portion of the cab 2. There was a simple flaw.

<Purpose of the invention> The purpose of this invention is to solve the technical problem of the tilt cab of the cab over truck based on the above-mentioned prior art, and to solve the problem of the tilt cab of the cab over truck. Provided is an excellent tilt cab device for a cab over truck which is useful in the field of use of tilt mechanisms in the automobile industry by preventing the reaction force of the spring from acting on the cab while the cab over truck is running. This is what we intend to provide.

<Structure of the invention> In accordance with the above-mentioned purpose, the structure of this invention, which is based on the scope of the above-mentioned utility model registration claim, is to provide an interposition between the seat and the cab while the cab over truck is running, in order to solve the above-mentioned problems. By locking the plunger in the guided sleeve through the pawl, the spring biasing force in the guide sleeve with one side of the sleeve inside is restricted from acting on the cab side, and the spring biasing reaction force is prevented from acting on the cab side. This improves passenger comfort by preventing cab vibration caused by
Also, while the cabover truck is stopped, for example,
When it is desired to tilt the cab during engine maintenance, the plunger is unlocked through the above-mentioned pole and the biasing force of the spring is applied to the cab, thereby reducing the force required to tilt the cab. A technical measure was taken to make it possible to lift the rear part of the vehicle forward.

<Embodiment - Configuration> Next, one embodiment of this invention will be described as follows based on the drawings from FIG. 2 onwards. Note that the same parts as in FIG. 2 will be explained using the same reference numerals.

Reference numeral 5 denotes a tilt cab device, which is the gist of the invention, and is made up of a guide sleeve 6 and a sleeve 7 with one side inside the guide sleeve 6. The sleeve 7 is interposed between the cab 2 and the chassis 3, with its base supported by a pin at a predetermined position in the front of the cab 2.

A plunger 11 having a ratchet 10 engraved on the guide pin 9 extending laterally at one end of the sleeve 7 connects the sleeve 7 through its communication hole 12.
A torsion spring 13 is provided in the guide sleeve 6 near the plunger 11 so as to prevent the plunger 11 from shifting in its rotational direction.

The base of a pawl 15 is supported by a pin on a bracket (not shown) provided at a predetermined position of the guide sleeve 6 via a spring 14.
One end of the pawl 15 is latched onto a ratchet 10 formed on the plunger 11 so as to be releasable, and the other end of the pawl 15 is connected to a release cable 17 connected to a release knob 16 provided at a predetermined position inside the cab 2. ing.

<Embodiment - Effect> In the above-described configuration, when the cab over truck 1 is running, the cab 2 vibrates up and down, a sliding movement occurs between the guide sleeve 6 and the sleeve 7 of the tilt cab device 5, and the vibration causes the tilt cab device to move. The sleeve 7 of No. 5 is pushed into the guide sleeve 6, and the plunger 11 is pressed and urged to move the latch position of the ratchet 10 of the plunger 11 of the pawl 15 toward the guide sleeve 6 side.

When the sleeve 7 moves in the direction of coming out of the guide sleeve 6, the plunger 11 is locked by the pawl 15 and moves without receiving the reaction force of the torsion spring 13.

Therefore, since the plunger 11 is fixed at the position of maximum amplitude due to the vertical vibration of the cab 2, the reaction force of the torsion spring 13 does not act all the time and affects the normal vibration of the cab 2. It seems like it never happens.

On the other hand, when tilting, the pawl 15 is moved by the spring 14 by operating the release knob 16 inside the cab 2.
The shaft rotates against the biasing force of the pole 15, and the tip of the pole 15 that locks the plunger 11 comes off, so that the torsion spring 13 pushes the sleeve 7 through the plunger 11, and the cab 2 is moved by the torsion spring. 13 and lifts the cab 2 of the cab over truck 1 forward via the hinge 4, the operating load is reduced and the cab 2 can be easily tilted. It's summery.

<Other Examples> It goes without saying that the embodiments of this invention are not limited to the above-mentioned embodiments. For example, the shapes of the sleeve and guide sleeve are not limited to cylindrical shapes, but various shapes such as angular shapes may be adopted. It is possible.

<Effects of the invention> According to the invention, in a tilt cab device in which the cab can be lifted forward via a hinge at the front end of the chassis, a sleeve is provided between a predetermined position of the chassis and a predetermined position of the lower part of the cab. A guide sleeve is interposed inside one side of the sleeve, and a spring provided in the guide sleeve is urged into contact with one end of the sleeve via a plunger having a ratchet, In addition, the plunger's ratchet is made to engage and disengage freely from a pawl linked to the release knob, so that when the cab does not need to be tilted, such as when running on a cab over track, the spring in the guide sleeve engages and disengages the pawl. The lock on the plunger restricts the reaction force of the spring and prevents the cab from always being biased.As a result, the cab does not receive the reaction force of the spring while the vehicle is running, and the vibrations of the cab are suppressed. Riding comfort is also improved, and there is an excellent effect of preventing wear on the local part of the cab that connects the tilt cab device.

Additionally, if you want to tilt the cab to maintain the engine of a cab over truck, move the pole away from the plunger ratchet to release the lock, and the biasing force of the spring in the guide sleeve will be reduced. It acts on the cab side, helps and reduces the operating force required to lift the cab forward, and has the effect of making it possible to easily tilt the cab.

In addition, because of its simple structure, it can be manufactured at low cost, and the tilt cab device has the advantage of being able to be used in place of a conventional cab over truck.

[Brief explanation of the drawing]

Fig. 1 is an explanatory side view of a conventional cab over truck, Fig. 2 and the following are explanatory views of embodiments of this invention, Fig. 2 is a view corresponding to Fig. 1, and Fig. 3 is a partial cross section of a tilt cab device. It is an explanatory diagram. 3... Shade, 4... Hinge, 2... Cab,
5...Tilt cab device, 7...Sleeve, 6...
...Guide sleeve, 13...Spring, 10...
...Ratchet, 11...Plunger, 16...Release knob, 15...Pole.

Claims (1)

[Scope of utility model registration request] In a tilt cab device in which a cab can be freely lifted forward through a hinge at the front end of a chassis, a sleeve and a guide sleeve with one side of the sleeve inside are arranged between a predetermined position of the chassis and a predetermined lower part of the cab. A spring provided in the guide sleeve is urged into contact with one end of the sleeve via a plunger having a ratchet, and a pole connected to the release knob is attached to the ratchet of the plunger. A tilt cab device characterized in that the can be freely engaged and separated.