JPH0515195Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a driver's cab lifting device for use in automobiles such as trucks.

[Prior Art] Conventionally, a driver's cab lifting device as shown in FIG. 3 has been used.

In FIG. 3, one end 1a of actuator A
is pivotally connected to the chassis C of the automobile, the other end is pivotally connected to the driver's cab B of the automobile, the front lower part of the driver's cab B is pivotally connected to one end of the chassis C, and the pivot point is as shown in the figure. By expanding and contracting the actuator A in the axial direction, the driver's cab B can be tilted forward and lifted.

The need to lift the driver's cab B
The engine is installed at the bottom of the engine, and it is necessary when the engine breaks down or when the engine is inspected.

Regarding the detailed configuration of the actuator A in FIG. 3, a side view thereof is shown in FIG. 4.

In FIG. 4, one end 1a of actuator A
A piston is installed in the cylinder member 1 connected to the cylinder member 1, a pin 1i is fitted into the head of the piston, a pin 1d is fitted into the driver's cab B, and a link 1c is fitted into the cylinder member 1.
are pin 1i and pin 1d at both ends respectively.
It is centrally located.

A stopper member 2 is interposed between the holding member 1h fixed to the cylinder member 1 and the cylinder member 1 so as to be able to slide in the axial direction, and one end of the stopper member 2 is pivotally attached to the pin 1i. One end of the lever 1f is pivotally connected to the pin 1e fitted into the cylinder member 1, and the lever 1f
A pawl 1j is fixed to the pawl 1j, and the pawl 1j is urged toward the stopper material 2 by the urging force of the spring 1g, and the stopper material 2 has a plurality of grooves 2 in its axial direction.
A is provided.

In the configuration of the conventional cab lifting device described above, when lifting the cab B as shown in FIG. When it is pushed up and reaches a predetermined position, a limit switch (not shown) etc. is activated, and the extension of the actuator is stopped, and the driver's cab B is stopped at the position shown in FIG. 3.

In such a stopped state, if the cab B shortens the actuator by pushing down due to its weight, the stopper member 2 will also be pushed down together with the pin 1i, thereby causing the pawl 1j to move into the groove. 2a and the claw 1j is in the groove 2a.
to stop the lowering mechanically.

Further, when pushing up the cab B from this state, if the actuator A is extended as it is, the pawl 1j will naturally come off the sloped part of the groove 2a, and the cab B will be pushed up further. I'm going to go.

That is, the spring 1g, the pawl 1j, and the stopper member 2 constitute a ratchet mechanism, and the outer periphery of the cylinder member 1 serves as a guide member for the stopper 2.

When lowering the driver's cab B from the above-mentioned pushed-up state, by shortening the actuator A in the axial direction while lifting the lever 1f from the groove 2a, the driver's cab B will be moved back to its normal position due to its weight. descend into position.

[Problems to be solved by the invention] However, in the conventional cab lifting device described above, when the cab B is lowered to the normal position and the automobile is driven, the stopper is not lifted at the part a in FIG. There was a problem in that the material 2 and the cylinder member 1 vibrated with each other, producing noise, and the paint applied to the cylinder member 1 peeled off due to the vibration.

An object of the present invention is to provide a cab lifting device that solves the above-mentioned problems.

[Characteristics for solving the problem] In part a of FIG. 4, a V-shaped bearing member 4 is provided between the outer periphery of the cylinder member 1 and the stopper member 2.
The bearing material is provided such that a portion corresponding to the bottom of the V-shape is fixed to the stopper material, and the cylindrical outer peripheral portion of the cylinder member is pivotally supported in the V-shaped recess.

Further, the portions of the bearing material that pivotally support the V-shaped cylinder member are elastic portions 4b1 and 4c1 having a cantilever-like spring action.
When the cylinder member vibrates, the elastic portions 4b1 and 4c1 slide in contact with the cylinder member and absorb the vibration energy by the sliding resistance, thereby damping the vibration.

[Examples] The present invention will be described below based on Examples. 1 shows a side cross-sectional view of part a of the present invention, which is an improved part a in FIG. 4, and FIG. 2 shows only the bearing material 4 in FIG. The stopper material 3 in FIG. 4 corresponds to the stopper material 2 in FIG. 4, and the groove 3a corresponds to the groove 2a in FIG.

As shown in Fig. 2, a substantially V-shaped bearing material 4
The protrusion 4a fixed to the portion corresponding to the V-shaped bottom fits into the perforation 3b made in the stopper material 3, and the bearing material 4 is made of a synthetic resin material, with slightly less than the upper half of the bearing material 4 having an open configuration. I am doing it.

Each of the parts 4b and 4c of the bearing material 4 slides on the elastic part of the bearing material 4 by the action of a spring that has a cantilever shape on the left and right, with the protrusion 4a part in FIG. 2 being a fixed part. It is closer to the resistance part. That is, each of the elastic portions 4b1 and 4c1 has an elastic force in the vertical direction in FIG.
It consists of support parts 4b2 and 4c2 that slide on the stopper material 3 and perform damping while the parts 1 and 4c1 are vibrating.

In addition, the elastic portions 4c1 and 4b1 of the bearing material 4
In the recessed part of the V-shape formed by
The cylindrical outer circumferential portion of the cylinder member 1 is pivotally supported.

The operation of the above configuration will be explained below.

The operation of the driver's cab lifting device of the present invention to lift or lower the driver's cab B is similar to the conventional operation explained in FIGS. 3 and 4.

However, this problem occurs when the driver's cab B is set in the normal position and the car is driven. In the above-mentioned vibration in the part a of FIG. 4, as shown in FIG. By the movement, as in the conventional case, the cylinder member 1
The paint applied to the outer periphery will not peel off.

Also, due to the vibration, the stopper material 3 is
The stopper material 3 vibrates in a pendulum state around (Fig. 4) and tries to come into contact with the surface of the cylinder member 1 at part a, but the bearing material 4 is between the cylinder member 1 and the stopper material 3. Since elastic parts 4b1 and 4c1 are present in the interposed bearing material 4, the vibration impact is reduced by the spring action of the elastic parts 4b1 and 4c1 and the sliding resistance action of the supporting parts 4b2 and 4c2. Soothed.

In this case, when the outer periphery of the cylinder 1 vibrates and vibrates the elastic parts 4c1, 4b1, sliding due to relative slipping also occurs between the outer periphery of the cylinder 1 and the elastic parts 4c1, 4b1. Sliding resistance also contributes to vibration damping.

Therefore, the outer periphery of this cylinder 1 and the elastic part 4
If the frictional resistance between the supporting parts 4c2 and 4b2 is increased, the sliding resistance of the supporting parts 4c2 and 4b2 is not necessarily required.

Furthermore, as can be understood from the shape of FIG. 2, the spring force of the elastic parts 4b and 4c acts toward the center 1k of the cylinder member 1, so the spring action of the elastic parts 4b and 4c is , by effectively suppressing the vibration only in the vertical direction as shown in FIG. 2, by only the elastic parts 4b and 4c,
The vibrations are effectively damped.

In addition, in the sliding movement of the cylinder member 1 and the bearing material 4 in the axial direction, since the outer periphery of the cylinder member 1 serves as a guide member for the bearing material 4, the sliding movement of the bearing material 4 with respect to the cylinder member 1 is It facilitates movement in the axial direction.

For the above operation, the bearing material 4 is
When installing the protrusion 4a into the perforation 3b, the protrusion 4a can be easily fitted into the perforation 3b by simply pushing the protrusion 4a into the perforation 3b.

Because the protrusion 4a is provided with the groove 4e, when the protrusion 4a is pushed into the hole 3b, the width of the groove 4e is narrowed by the hole 3b, making it easier to push the protrusion 4a into the hole 3b. This is because it becomes.

After pushing in, the outer circumference of the protrusion 4a is pressed against the perforation 3b due to its elastic force in the radial direction, and the flange 4d fixed to the protrusion 4a is locked to the perforation 3b, so that the protrusion 4a Fitting into the hole 3b is easily completed.

Furthermore, since the bearing material 4 does not surround the entire outer circumference of the cylinder member 1, but supports the cylinder member 1 in a semicircular manner, the bearing material 4 is not wrapped around the entire circumference of the cylinder member 1, but is supported by the cylinder member 1 in a semicircular manner. 3 and the cylinder member 1, the mounting is facilitated.

In addition, the ratchet structure shown in FIG. 4 has a groove 2a on the stopper material 2 side and a pawl 1j on the cylinder member 1 side. A claw may be provided on the second side.

[Effects of the invention] As is clear from the above description, the effects of the invention are as follows.

1 By interposing the bearing material 4 between the cylinder member 1 and the stopper material 3, the fear of peeling off the paint applied to the cylinder member 1 due to the vibration of the stopper material 3 against the cylinder member 1 is reduced, and 2. By providing the elastic parts 4b and 4c in the bearing material 4, it is possible to damp the vibration between the cylinder member 1 and the stopper material 3, and it is possible to reduce the vibration noise of the automobile. It became.

3. A projection is fixed to the part of the bearing material that comes into contact with the stopper material, and the projection is provided with a groove in the axial direction, so that the projection has an elastic force directed outward in the radial direction. When doing so, it becomes easy to fix the bearing material 4 to the stopper material 3.

4. When the bearing material opens the opposite side to which the protrusion is fixed in the direction of the spring force provided between the guide material and the stopper material, thereby making its vertical cross-sectional shape a semicircular arc shape. By opening the opposite side, mounting of the cylinder member 1 and the bearing material 4 is facilitated.

[Brief explanation of the drawing]

FIG. 1 is a side cross-sectional view of the cylinder portion of the improved cab lifting device, which is an improved conventional cab lifting device, and FIG. 2 is a side view of only the bearing material 4 in FIG. , FIG. 3 shows a side view of a conventional cab lifting device mounted on an automobile, and FIG. 4 shows a detailed side view of the conventional actuator A in FIG. The symbols used in the examples are as follows. A...actuator, B...driver's cab, C...
Chassis, 1...Cylinder member, 1a...One end of actuator A, 1g...Spring, 1j...
...claws, 2 and 3...stopper pieces, 3a...grooves,
3b...Drilling, 4...Bearing material, 4a...Protrusion, 4
b and 4c...elastic part, 4e...dividing groove.

Claims (1)

[Claims for Utility Model Registration] 1. The head of the piston, which is attached to a cylinder member 1 whose one end is attached to the chassis of an automobile and which raises and lowers the driver's cab of the automobile, has an outer peripheral surface of the cylinder along the axial direction. One end of the stopper material 2 that slides is attached to the cylinder member, and between one of the cylinder member or the stopper material and the other member, one end of the link with a fixed claw is attached to the one end of the link. and applies a spring biasing force to the claw toward the other member, so that when the one member and the other member move relative to each other along the axial direction, pawls selectively fit into grooves in the other member, interlocking each other during the retraction movement of the piston into the cylinder member and during the extension movement of the piston from the cylinder member; A ratchet mechanism is provided for the pawl to come out of the groove, and the V-shaped bearing material 4 provided between the stopper material and the cylinder member has the bottom of the V shape fixed to the stopper material and the V-shaped bearing material 4. The cylindrical outer circumferential portion of the cylinder member is provided in the recessed portion of the shape to be pivotally supported, and the portion of the bearing material that supports the V-shaped cylinder member is in the form of a cantilever beam with the bottom portion as the fixed portion. By doing so, the elastic parts 4c and 4 have a spring action in the direction between the cylinder member and the stopper member.
A driver's cab lifting device characterized by: b. 2. The configuration in which the V-shaped bearing material is fixed to the stopper material is such that a protrusion that has elastic force in the radial direction is fixed by providing a split groove in the bottom of the V-shape, and is fixed to the stopper material. The driver's cab lifting device according to claim 1, wherein the projection is fitted into a drilled hole.