JPH0589088U - Vehicle step device - Google Patents

Abstract

(57) [Abstract] [Purpose] With a simple structure, the steps for getting on and off the cab do not interfere with the wheels when the vehicle is cabulting, and the steps do not wobble when getting on and off the cab. [Structure] Below the front part of a cab 1 of a vehicle, upper parts of front and rear arms 2 and 3 are pivotally supported by shafts 4 and 5, respectively, and front and rear ends of a step body 6 are respectively connected to the lower parts of the arms 2 and 3. When the cab 1 is tilted about the axis 40, the step 10 is pivotally supported by 7, 8 and
The relative pulling force of the wire 14 causes the step 10 to move to the front wheel 9.
The shaft 5 is provided with a limit mechanism that swings forward so as not to interfere with and that swings the arm 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a retractable step device for a vehicle.

[0002]

[Prior Art]

 If the step for getting on and off the cab of a truck, etc. is fixed to the cab, it is not possible to reduce the ground height of the step or to move it in the front-rear direction in order to prevent the step from interfering with the front wheels when tilting the cabin. There is a problem that the step surface cannot be widened, and when the step is an automatic retractable type, an air actuating device, a motor, etc. for driving the step are required, and many of them are electrically controlled. The number of parts is required, and the increase in cost and weight is unavoidable.

[0003]

[Problems to be solved by the device]

 The present invention has a simple structure so that the steps for getting on and off the cab do not interfere with the wheels when the cab is tilted, and the steps do not wobble when getting on and off the cab, etc. Is what you are trying to do.

[0004]

[Means for Solving the Problems]

 To achieve this object, a vehicle stepping device according to the present invention comprises an arm whose upper part is pivotally supported by a cab, a step body pivotally supported by a lower part of the cab, and a chassis side below the tilt axis of the cab. And a tension member whose front and rear ends are respectively connected to the step body or the arm, and which is installed at the pivot point and is biased by a spring, the load is applied to the step body or the arm at a predetermined amount or more in the backward direction. It has a limiter mechanism that allows relative rotation of the pivot member against the biasing force of the spring.

[0005]

[Action]

 Therefore, when the cab is tilted, the step body or arm is pulled forward by the tension member whose front end is connected to the chassis side below the tilt axis of the cab, and the step body and arm are displaced forward relative to the cab. However, it is possible to easily avoid these from interfering with the wheels, but the relative rotation of the pivot member is always suppressed by the limiter mechanism, so the steps do not wobble and it is easy to get on and off and the load above a predetermined When is acted, the relative rotation of the pivot member is allowed by the operation of the limiter mechanism, and damage to the step can be minimized.

[0006]

【Example】

 Hereinafter, embodiments of the present invention shown in the drawings will be specifically described. In FIG. 1, below the front part of the cab 1 of the truck, the substantially parallel upper and lower arms 2 and 3 are pivotally supported by shafts 4 and 5, respectively, and the step bodies are respectively attached to the lower parts of the arms 2 and 3. The front and rear ends of 6 are pivotally supported by shafts 7 and 8, respectively, and the arms 2 and 3 and the step body 6 constitute a step 10 for getting on and off the cab 1 in front of the front wheel 9, and the cab 1 and the arm 2 A return spring 11 is stretched between them.

On the other hand, as shown in FIG. 2, a crank 12 is pivotally attached to the inside of the rear side of the step body 6, and a rear end of a wire 14 is attached to one arm 13 of the crank 12. The other arm 15 of 12 is engaged with a cam 16 fixed to the pivot shaft 8, and the front end of the wire 14 is attached to the chassis on the rear surface of the front bumper 17 as shown in FIG.

Further, as shown in FIGS. 3 and 4, a round shaft portion 20 and a square shaft portion 21 are formed at the inner end of the pivot shaft 5, and a recess 22 is formed in the round shaft portion 20. The central round hole 24 provided in the base 23 is rotatably fitted, and the arm 25 of the base 23 is fixed to the inner side surface of the arm 3 by a bolt 26.

The central angular holes of the disc 27 and the cap 28 are fitted into the angular shaft portion 21 of the pivot 5, and four disc springs 29 are provided in the base recess 22 to accommodate the disc 27 and the cap 28. It is inserted into the angular shaft portion 21 so as to be sandwiched between the caps 28, the bolt 31 is screwed into the tip of the pivot shaft 5 with the pressing plate 30 sandwiched therebetween, and the disc spring 29 is compressed. A bolt (not shown) is inserted into the provided bolt hole 33 and screwed into the cab side, so that the pivot shaft 5 is prevented from rotating toward the cab side.

Further, three recesses 34 are formed on the end surface of the disk 27 at equal intervals on the circumference, while the bottom surface of the base recess 22 has a cross section facing the recesses 34 and extending in the circumferential direction. Three substantially V-shaped arcuate grooves 35 are formed at equal intervals, and a ball 36 is fitted so as to straddle between the recesses 34 and the grooves 35, and the pivot shaft 5, the base 23, and the disc 27 are provided. The cap 28, the disc spring 29, the ball 36 and the like constitute a limiter mechanism 37.

Therefore, the step 10 is held in the state of FIG. 1 by the action of the return spring 11, the arm 15 of the crank 12, the cam 16, the limiter mechanism 37, etc., and the vibration during the getting on / off of the cab 1 or the traveling of the vehicle is caused. As a result, the step 10 does not wobble, and even if a load is applied to the step 10 from the rear side, the step 15 is caused by the engagement of the arm 15 of the crank 12 and the cam 16 as shown in FIG. 10 is locked, and when a load is applied to the step 10 from the front side, the balls 36 in the recesses 34 on the end face of the disc 27 are not shown in the groove 35 on the bottom face of the base recess 22. 4, the base 23 is held in the groove 35 by the pressing force of the disc spring 29, so that the base 23 has the ball 36, the disc 27, the pivot 5 and the cap. Two Since the arm 3 is retained in the state shown in FIG. 1 by being prevented from rotating toward the cab via 8, the step 10 can withstand the above-mentioned front load.

Further, when an excessive load is applied to the step 10 from the front during traveling of the vehicle, each ball 36 resists the pressing force of the disc spring 29 and moves into the groove 35 on the bottom surface of the base recess 22. Disengaging from the end, the base 23 pivots on the round shaft portion 20 of the pivot shaft 5 in the clockwise direction in FIG. 4, that is, toward the rear of the vehicle, so that the arm 3 also rotates rearward about the pivot shaft 5. Since movement is allowed, the damage received by the step 10 swinging backwards can be minimized.

Next, when the cab 1 is tilted around the tilt shaft 40 shown in FIG. 1, the rear end of the wire 14 is pulled relatively forward due to the relative displacement between the cab 1 and the chassis. 2 rotates as shown by the broken line in FIG. 2, as a result of which the arm 15 of the crank 12 and the cam 16 of the pivot shaft 8 are disengaged, while the balls 36 in the recesses 34 on the end face of the disc 27 are released. Can relatively rotate in the groove 35 on the bottom surface of the base recess 22 in the clockwise direction in FIG. 4, while the base 23 can rotate in the counterclockwise direction in FIG. 4 without great resistance. On the other hand, since the arm 3 can rotate in the clockwise direction in FIG. 1 about the pivot 5, the relative pulling force of the wire 14 causes the step 10 as shown in FIG. 5 as the cab 1 is tilted. Oscillates forward, which results in a step It is possible to surely avoid the step 10 and the front wheel 9 from interfering with each other as shown by the chain double-dashed line in FIG. Further, when the tilted cab 1 is returned to the original normal position, the pulling force of the return spring 11 allows the step 10 to automatically return from the state of FIG. 5 to the state of FIG.

As described above, the step 10 does not wobble, and when the cab 1 is tilted, the step 10 swings forward and interference with the front wheels can be reliably avoided, so that the step main body 6 By lowering the ground clearance and lengthening the step body 6 in the front-rear direction, it is possible to easily get on and off the cab 1. Further, since the limiter mechanism 37 can withstand the forward load applied to the step 10, and the excessive load from the front side, the step 10 can be displaced rearward to minimize the damage. It is practically very convenient.

In the above embodiment, the rear end of the wire is connected to the step body, but it can be connected to either the front or rear arm, and the limiter mechanism can be connected to the lower end of the rear arm and the step body. It is also possible to provide the pivotal point with respect to the main body or the pivotal points of the upper and lower ends of the front arm, and it is possible to achieve the same effects as the above-described embodiment.

[0016]

[Effect of the device]

 In the step device for a vehicle according to the present invention, when the cab is tilted, the step body or arm is pulled forward by the pulling member and the step is displaced forward with respect to the cab, so that it is easy to interfere with the front wheels. While it can be avoided, the relative rotation of the step pivot member is always suppressed by the limiter mechanism, so it is easy to get on and off because the step does not wobble, and the limiter is activated when a load more than a predetermined amount is applied to the step body. The actuation of the mechanism allows relative rotation of the step pivot member to minimize damage to the step.

[Brief description of drawings]

FIG. 1 is a schematic side view of an embodiment of the present invention.

FIG. 2 is an explanatory view of the operation of the main part of the above embodiment.

FIG. 3 is a vertical cross-sectional view of another main part of the above embodiment.

4 is a left side view of FIG.

FIG. 5 is an explanatory view of the operation of the above embodiment.

[Explanation of symbols]

 1 cab 2 arm 3 arm 4 pivot shaft 5 pivot shaft 6 step body 7 pivot shaft 8 pivot shaft 10 step 12 crank 14 wire 16 cam 23 base 27 disc 28 cap 29 disc spring 35 arc groove 36 ball 37 limiter Mechanism 40 Tilt axis

Claims (1)

[Scope of utility model registration request] 1. An arm whose upper part is pivotally supported by a cab, a step body pivotally supported by a lower part of the arm, a chassis side below a tilt shaft of the cab and the step body or the arm respectively have front and rear ends. Relative rotation of the pivot member against the biasing force of the spring against a rearward load on the step body or the arm that is installed at the connected tension member and the pivot point and is biased by a spring. A step device for a vehicle having a limiter mechanism that allows the following.