JPS586868Y2 - Pantograph type jack - Google Patents

Description

[Detailed description of the invention] This invention relates to an improvement of a pantograph-type jack that is used to lift an object, especially a part of a car body, and consists of a structure in which the link mechanism between four links and an operating screw rod is used to lift an object, especially a part of a car body. It was devised with the main objectives of making this type of jack lighter and more compact, and increasing the operating speed (the speed of vertical movement of the jack head).

To explain in detail with reference to the drawings, the jack of this invention is equipped with a support metal 13 at one end that is immovable in the axial direction but is relatively rotatable around the axis. A horizontally extending operating threaded rod 11 in which a nut 15 that is relatively rotatable and axially movable is engaged with a threaded portion occupying a substantial portion; and one end extending above the operating threaded rod 11. a first long link 17 to which a jacking head 19 is attached; and a second long link 21 extending below the operating jack 11 and having a jacking base 23 pivotally attached to one end thereof.
and first and second short links 25, 27 extending from the upper button to the lower side of the operating threaded rod 11, respectively.

The first long link 17 is located above the operating threaded rod 11.
The other end of the second long link is pivotally connected to the nut 15 or the support metal 13 so that it can rotate around the nut 15 as shown in the figure or around the support metal 13 (not shown). Reference numeral 21 has the other end pivotally connected to the other end of the first long link 17 on the lower side of the operating threaded rod 11 so that it can rotate around the nut 15 or the support metal 13 like the first long link 1T. It is pivotally attached to a nut 15 or a support metal 13.

The illustrated first and second long links 17.21 are both channel-shaped with an opening on the side facing the operating threaded rod 11;
Its width is larger than the diameter of the operating screw rod 11, and the width of the former is smaller than that of the latter so that the former is included in the latter.

On the other hand, the first short link 25 is arranged above the operating threaded rod 11 so that one end thereof can rotate around the support metal 13 as shown in the figure or around the nut 15 (not shown). The other end of the second long link 17.21 is pivotally connected to the non-pivotally connected support metal 13 or nut 15, and the other end is pivotally connected to the intermediate portion in the length direction of the first long link 17. One end of the second short link 27 is connected to the first short link 27 under the operating threaded rod 11 so that it can rotate around the support metal 13 or the nut 15 in the same way as the first short link 25. One end of the link 25 is pivotally connected to the supporting metal 13 or nut 15, and the other end is pivotally connected to the intermediate portion of the second long link 21 in the length direction.

The illustrated first and second short links 25.27 as well as the first and second long links 17.21 are similar to the operating threaded rod 1.
1, the width of which is larger than the diameter of the operating screw rod 11, and the first and second short links 25.
The first short link 25 is sized so that it is included in the long link 17.21, and the first short link 25 is included in the second short link 2T.

The jack of this invention is the operating threaded rod 11 as described above.
It consists of a combined configuration of first and second long links 17.21 and first and second short links 25.27, and when not in use, the first and second long links 17,
21 and the first and second short links 25.27 are operated 1
It is folded in such a way that J11 is sandwiched between the top and bottom, and the first
A jack head 19 added to one end of the long link 17 is pivotally connected to one end of the second long link 21.
When approaching 3, it will be in a low state where it descends with a doo.

In such an unused state, when the operating screw rod 11 is rotated forward through the operating end, the nut 15 that engages with the threaded portion of the operating screw rod 11 rests on the operating screw rod 11 and is supported. The first and second long links 17° 21 (in the illustrated example) or the first
and the second short link 25, 27 rotate respectively above and below the operating stud 11 about the pivot point in the nut 15, increasing the relative angle therebetween and thereby increasing the relative angle between them. 1 and 2 short links 25.27 and long links 17.21 also rotate upward and downward of the operating lever 11, respectively, about the pivot points in the support metal 13, and the relative angles therebetween are rotated. increase.

As a result, the jacking head 19 rises in the vertical direction while increasing the distance (interval) from the jacking base 23.
The object engaged with the jacking head 19 is lifted to a desired position.

On the other hand, when the operating screw 11 is reversed through the operating end in the state of use for lifting an object in which the jacking head 19 is spaced apart from the jacking base 23 as described above,
The nut 15 moves in the direction away from the support metal 13 by staying on the operating clamp 11, and as a result, the first and second long links 17, 21 and the short links 25, 27 are moved relative to each other. It rotates in the direction of decreasing angle, and finally reaches the unused state as shown in the figure.

As is clear from the above explanation, the pantograph type jack of this invention is formed by two short links 25.27 out of four links, and the first and second short links 25.27. Since the other ends are pivotally connected to the intermediate portions of the first and second long links 17.21 in the longitudinal direction, the length of the operating threaded rod 11 can be changed to the length of the first or second long link 17.21. length and first or second short link 25.2
Therefore, it can be made shorter than the sum of the lengths of . , lightweight, compact) and can be shaped (for example, the weight and length can be reduced to about 2/3 to 1/2 of known ones).

The jack devised by Otako is based on the short length of the short links 25 and 27, and the first and second long links are related to the unit rotation amount of the operating nut 1J110, and therefore the unit movement amount of the nut 15 along the operating threaded rod 11. Question 17.21 and the relative rotation between the first and second short links 25.27 is large, so
The speed at which the jacking head 19 moves away from and approaches the jacking base 23 is high, and the jacking operation can be performed quickly.

The jack of this invention can be appropriately installed between the jack base 23 and the nut 15 or supporting metal 13 which pivotally connects the other end of the second long link 21, with or without a member 29. , an auxiliary link 31 whose both ends are rotatably pivoted can be used to cross the bridge.

When such a configuration is added, the operation threaded rod 11 is connected to the auxiliary link 31 and the second
Because it is supported via the long link 21 [and the short link 27], stability is high, especially when the jack head 19 and jack base 23 are in close proximity when not in use.
In other words, the upper surface of the operating lever IJll and the jack head 19 can be held substantially horizontally at the time of starting use. Since it rotates around the landing point, the upper surfaces of the operating screw rod 11 button and the jack head 19 are inclined with respect to the horizontal plane].

[Brief explanation of the drawing]

The drawing is a side view of an embodiment of the pantograph-type jack according to the invention when it is not in use. 11...Operating screw, 13...Support metal, 15...Nut, 17...1st
19... Jyatsuki Head, 21.
...Second long link, 23...Jackie base, 25...First short link, 27...
...Second short link, 31...Auxiliary link.

Claims (1)

[Scope of utility model registration request] A support metal that cannot be moved in the axial direction but is rotatable relative to the shaft is attached to one end, and is rotatable and movable in the axial direction relative to the threaded part that occupies the substantial part in the axial direction. An operating screw head that extends horizontally and engages a nut, and a first shaft that extends above the operating screw head and has a jack head attached to one end and is pivoted to the supporting metal at the other end. A long link and a nut that extends below the operating threaded rod, has a jack base pivotally connected to one end, and the other end of the first long link is pivotally connected to the other end! or a second long link pivotally connected to the supporting metal, and extending above the operating threaded rod;
A first long link having one end pivotally connected to a non-pivotally mounted support metal or nut, and the other end pivotally connected to a longitudinally intermediate portion of the first long link. short link and
One end of the operating threaded rod extends below the first short link, and the other end is pivotally connected to a supporting metal member or nut that is pivotally connected to one end of the first short link. A punk graph type jack comprising a second short link pivotally connected to the bottom.