JPH0225835Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a rapid feed device for a Y-shaped jack.

Industrial Application Field The lower end of the lifting link, which is shorter than the support link, is rotatably pivoted at an intermediate position of the support link of a long rod, one end of which is grounded and the other end of which screws and pivots the operating screw rod. The tip of the operating screw rod is pivotally attached to the tip of the lifting link, and a load receiving member that engages with and lifts the side sill of the automobile is attached to the tip.
This invention relates to a device for fast-forwarding the operation of a shape jack until the load receiving piece engages with the side sill of an automobile.

Conventional technology As a fast forwarding technology, for example,
There are devices, such as the device of No. 1, in which a technology is applied to the screw structure provided on the operating shaft, which corresponds to the operating screw rod of the invention of the present application, and these can reduce the number of rotations of the operating shaft and move the load receiving position. There are devices that speed up propulsion.

Problems to be Solved by the Invention This invention achieves its purpose by moving the pivot position of the nut that is screwed into the operating screw rod in the support link, without adopting a fast-forwarding means by rotating the operating screw rod. It is something that makes you

Means for Solving the Problem A support link 2 is installed at approximately the middle position in the longitudinal direction of a long rod support link 2 whose lower end is the grounding part 1.
The lower end of the lifting link 3, which is shorter than the length, is rotatably pivoted on a pivot 4, and a load receiving member 5 that engages with the side sill of the automobile is attached to the upper end, and the load receiving member 5 is installed. The tip of the operating screw rod 6 is rotatably supported near the upper end of the nearby lifting link 3 by a pivot member 7. Male thread 8 of this operating screw rod 6
A terminal net 9 is screwed onto the front.

On the other hand, the lifting link 3 in the support link 2
This support link 2 is placed on both sides above the pivoted position.
A long hole 10 is drilled in the longitudinal direction, and a hook hole 11 that points upward through an acute angle θ is drilled in communication with the upper end of the long hole 10. A sliding shaft 12 is inserted from the outside, and is fitted and fixed on both sides of a nut 9 which is screwed onto the operating screw rod 6.

Function When the Y-shaped jack configured as described above is not in use, that is, when it is stored in a car, the folded state is such that the lifting link 3 is superimposed on the lower part of the support link 3, and the load receiving member 5 is folded. is located close to the grounding part 1, and the sliding shaft 12, which is implanted and fixed to the nut 9 screwed into the operating screw rod 6, engages with the lowermost end of the elongated hole 10, and these support links 2, Hanju link 3
In addition, each of the operating screw rods 6 is combined to form a single rod-shaped body.

When using this, if the lifting link 3 is rotated about the pivot shaft 4 from the support link 2, the operating screw rod 6 will also move as the lifting link 3 rotates, and the sliding shaft 12 will move. The sliding shaft 12 moves through the elongated hole 10 toward the upper end of the support link 3, and the sliding shaft 12 reaches the uppermost end of the elongated hole 10 when the upward angle between the lifting link 3 and the support link 2 becomes an acute angle. . Once this is done, the sliding shaft 12 is guided into the hook hole 11 and locked at the innermost part, thereby completing the assembly process of the Y-shaped jack. At this point, the jack is in a state where it can be used immediately as a jack, that is, the load receiving member 5 is engaged with the side sill of the automobile, the grounding part 1 is in contact with the ground, and the operating screw rod 6 is given rotational action. It immediately acts as a jack.

In general, Y-shaped jacks are centered around the axis,
The angle between the load receiving member and the grounding portion is inversely proportional to the degree to which the angle formed by the lifting link with the load receiving member at its apex and the support link to which the operating screw rod is screwed and pivoted shifts to an acute angle reduction angle. This is a phenomenon in which the line connecting the two increases, that is, it becomes a lifting effect, and the turning means of the operating screw rod is used for all the above-mentioned acute angle reduction angle transitions.

In this invention, a nut 9 screwed onto the operating screw rod 6 is attached to a sliding shaft 12 that protrudes from the nut 9.
is inserted into and engaged with an elongated hole 10 provided in the support link 2, and is slid from the lowermost end of the elongated hole 10 to the uppermost end at once to form a pivoting portion between the support link 2 and the hanging link 3. Reduce acute angles. When the sliding shaft 12 engages with the uppermost position of the elongated hole 10 in this way, if the load of the automobile is applied to the load receiving member 5, the sliding shaft 12 will again descend toward the lower end of the elongated hole 10. Since there is a risk of this happening, the hook hole 11 connected to the upper end of the elongated hole 10 is used instead. The acute angle that has been shifted to the small angle formed by moving to the hook hole 11 is somewhat widened and has a contradictory effect for the purpose of reducing the angle, but the sliding shaft 12 is moved to the innermost end of the hook hole 11. If the load is applied to the lifting link 3, a force will act on the support link 2 in the direction of rotation of the clock hand in the figure, and this will be applied to the operating screw rod 6, nut 9, and sliding shaft 12. The locking action of the hook hole 11 works to prevent rotation, thereby preventing the rotation of the support link 2 due to the load and at the same time converting it into a support action.

In addition, in order to cope with the loss due to the acute angle reduction phenomenon when the hook hole 11 of the sliding shaft 12 is locked, a distance corresponding to the loss is added to the length of the elongated hole 10. Therefore, the loss length can be eliminated.

Effect The nut 9 screwed into the operating screw rod 6 as described above
The operating screw rod 6 is rotated by engaging a sliding shaft 12 provided in the nut 9 so that the pivot point between the support link 2 and the support link 2 can be slid into a long hole 10 formed in the longitudinal direction of the support link 2. It is possible to arbitrarily change the angle formed by the support link 2 and the lifting link 3 without giving any movement, and in the past, this angle change was all achieved by multiple rotations of the operating screw rod. be.

Since this can be achieved by one movement of the pivot point between the operating screw rod 6 and the support link 2, this operation can be carried out in one movement until the start of lifting the car. It's easy to do.

Furthermore, by making the pivot point between the operating screw rod 6 and the support link 2 movable, the support link 2,
Since the three main members, the lifting link 3 and the operating screw rod 6, can be folded into one rod-shaped body, the volume can be reduced when stored in a car.

[Brief explanation of the drawing]

Figure 1 is a schematic front view of the entire Y-shaped jack, Figure 2
The figure is a front view of the Y-shaped jack showing the folded state, and FIG. 3 is an enlarged front view of the main parts. DESCRIPTION OF SYMBOLS 1... Ground contact part, 2... Support link, 3... Lifting link, 4... Pivot, 5... Load receiving member, 6...
Operation screw rod, 7... Pivotal support member, 9... Male thread, 9
...Natsuto, 10...Long hole, 11...Hook hole, 12
...Sliding shaft.

Claims (1)

[Scope of utility model registration request] The lower end of a lifting link 3, which is shorter than the length of the supporting link 2, is rotatably pivoted on a pivot 4 at approximately the middle position of a long rod support link 2 whose lower end is the grounding part 1, and the lifting link A load receiving member 5 is attached to the upper end of the load receiving member 5, and the tip of the operating screw rod 6 is rotatably supported by a pivot support member 7 near the installation position of the load receiving member 5, and is screwed into the male thread of the operating screw rod 6. A long hole 10 is bored in the same direction as the longitudinal direction of the sliding shaft 12 implanted and fixed on both sides of the sliding shaft 12 above the mounting position of the pivot 4 in the support link 2, and the upper end of the long hole is A fast-forwarding device for a Y-shaped jack, which is formed by boring a hook hole 11 pointing upward at a more acute angle and slidably engaging either the elongated hole 10 or the hook hole 11.