JPS6026072Y2 - link work jack - Google Patents

Description

[Detailed description of the invention] This invention relates to a linkage jack installed in automobiles, and its main objectives are to reduce the amount of storage space required when not in use, and to stabilize the load-supporting posture when in use. be.

Explaining with reference to the drawings, the linkage jack according to this invention has a first link 13 whose one end is pivotally connected to the jack pedestal 11, as shown in the frame diagrams of FIGS. 1a, b, and c. , a second link 15 having one end pivotally connected to the other end of the first link 13 and having a jack loading platform 17 at the other end; The other end is pivotally connected to the jack pedestal, 11 at a distance from the pivot point at one end of the first link 13.
A third link 19 extending substantially parallel to the first link 13 and a support metal 23 whose tip is pivoted to the third link 19
The second link 15 is supported rotatably around the axis via the second link 15, and the intermediate portion in the longitudinal direction is threadedly engaged with a nut 25 pivoted to the intermediate portion of the second link 15. It consists of an extending operating threaded rod 21.

Here, a support metal 2 supporting the tip of the operating screw rod 21
The pivot position of the third link 19 of No. 3 is arbitrary;
In addition to the same position as the pivot position of the other end of the third link 19 on the jack pedestal 11 as shown in Figure a and the intermediate part in the length direction of the third link 19 as shown in Figure 1, 1
It is also possible to form an extension 19a at the other end extending beyond the pivot position of the third link 19 on the jack pedestal 11 as shown in FIG.

The linkage jack of this invention having such a configuration basically rotates the operating threaded rod 21 forward or backward through the operating section at the other end to rotate the nut 25 to the operating threaded rod 2.
1, the relative angle (inner angle) between the second link 15 and the first link 13 and third link 19 is increased or decreased, and the jack load receiving platform 17 is attached to the jack pedestal 11. It is used in the form of approaching and separating from the enemy.

However, in the link-in-place jack according to this invention, when the jack loading platform 17 is brought closest to the jack pedestal 11 and the jack is not in use, the first, second and third links 13, 15
．． 19 and the operating threaded rod 21 are folded closely together, resulting in an extremely low overall height, and the overall length is equal to or slightly longer than the longest link, so the storage space is extremely small. I'll try it.

According to this jacket, the first and third links 13.
Due to the unique link arrangement including the substantially parallel extensions of the jacks 19, the jack receiver 17 moves approximately perpendicular to the jack seat 11.

Therefore, the load can be supported in a stable posture and raised and lowered.

FIG. 2 shows an embodiment of the linkage jack according to the invention, which corresponds to FIG. 1a.

In this embodiment, although details are not shown, each of the first, second and third links 13, 15, 19 is formed by a pair of opposing plates separated by different distances.

Further, in this example, the support metal 23 that rotatably supports the tip of the operating threaded rod 21 serves as a pivot pin in the jack pedestal 11 at the other end of the third link 21.

In FIG. 2, reference numeral 27 designates thrust bearings 29a and 29b for smooth rotation of the operating screw rod 21 around the axis.
The operation threaded rod 21 has a support metal 23 and a thrust bearing 27.
The clamp link is attached to clamp the operating threaded rod 21 with respect to the supporting metal 23, thereby restricting movement of the operating threaded rod 21 in the axial direction.

[Brief explanation of the drawing]

Figures 1a, b, and C are skeletal views of three types of link jacks according to this invention, and Figure 2 is a partially cutaway side view of an embodiment of the link jack jack corresponding to the frame diagram of Figure 1a. It is. 11... Jyatsuki pedestal, 13... 1st
Link, 15...Second link, 17...
...Jacket loading platform, 19...Third link, 21...Operating threaded rod, 23...Support metal, 25...Nut.

Claims (1)

[Scope of utility model registration request] A first link having one end pivotally connected to a jack pedestal, a second link having one end pivotally connected to the other end of the first link and having a jack pedestal at the other end; The first link is pivoted at a position close to one end of the link, and the other end is pivoted to the jack pedestal at a distance from the pivot point of the first link.
A third link extends approximately parallel to the third link, and the distal end is rotatably supported around the axis via a support metal pivoted to the third link, and the intermediate portion is supported by the third link. A ring-rigging jack consisting of an operating threaded rod extending across a second link, which is threadedly engaged with a nut pivoted at the intermediate portion.