CN2228900Y - Improved scissor jack - Google Patents

Abstract

The utility model relates to an improved scissor jack, which comprises a base, wherein, a lifting apparatus and an oil chamber are arranged on one end of the base, and a raising and hoisting mechanism is arranged on the other end of the base. A three-section type jack core chamber is arranged in the raising and hoisting mechanism, a connection base arranged on the upper end of the jack core chamber is pivoted with a lifting arm, and the other end of the lifting arm is pivoted on the center of the lower raising arm of the raising and hoisting mechanism; thus, the raising and hoisting mechanism can bear heavy load under the same operating force.

Description

The modified form scissors-type jack

The utility model relates to a kind of modified form scissors-type jack, refers to that especially a kind of jack that can make carries the greater weight structure.

Jack is one of important accessory of automobile, and along with science and technology development, the structure of jack also has great variation, and the builder is at the demand of each hierarchy of consumption, and the jack that produces various different structures for you to choose.

Pressing the operating mode of jack distinguishes, can be divided into and manually reach electronic two kinds of patterns, distinguish with structure, can be divided into mechanical type, hydraulic type, distinguish with the mechanism that rises again, then can be divided into the wheeled formula that rises, upright formula and the scissors formula that rises that rises, but the structure and the mechanism's cross-application design again that rises in design, can see the jack of very many different types on the market, the customer can choose suitable jack according to price, volume, operating mode etc. as considering foundation.

Wherein, the operating principle of scissors-type jack is to drive the mechanism action of being made up of the arm that raises up, lower raising arm that rises according to hoisting device, makes the top of the upper end piece of pulling up mobile fast by linkage rod group, with automobile jack-up up; Therefore, in the design process of scissors-type jack, except noting the design between hoisting device and lift system, the arm that raises up, the lower raising arm of lift system and the relative position of carrying between arm are also quite important, and be improper because of the relative position design of each armed lever, can produce problems such as load is less, hoisting depth is limited, if M/C, this load problem of smaller more makes the user feel puzzlement, and there is the less puzzlement of load really in oil pressure manually operated scissors-type jack at present.

Please referring to shown in Figure 6, traditional jack has a base 80, base 80 1 ends are provided with grease chamber 81 and hoisting device 82, and be provided with the mechanism 90 that rises at other end, rise in the mechanism 90 and be provided with top ventricle 83, this top ventricle 83 is the most traditional two-piece design, set firmly a connecting base 84 in the top heart 831 upper ends, the both sides of connecting base 84 respectively are pivoted and carry arm 91, carry arm 91 other ends and be hubbed on lower raising arm 92 near pivoting point 921 places, lower raising arm 92 end in addition then articulates with the arm 93 that raises up, the both sides arm 93 that raises up articulates with the upper end top piece 94 of pulling again, when the piston rod repetitiousness action that drives with rocking handle 821 in the hoisting device 82, makes the interior high-voltage oil liquid in grease chamber 81 in oil circuit enters top ventricle 83, gradually with the top heart 831 jack-up, when the top heart 831 is up mobile, both sides lower raising arm 92 is up drawn, because the change of angle by carrying arm 91, the arm 93 that raises up is up risen, reach the purpose of weight lifting.

Fig. 7 is the plan sketch of mechanism of rising, at the point of application too near fulcrum under the situation away from resistance points, the operation of carrying arm 91 must be with big strength with the lower raising arm pull-up, can make load force be subjected to certain restriction, also there is the builder will carry the articulated section of arm and lower raising arm, move to the centre of lower raising arm, hope can reach the purpose that load improves, yet because of the design of the mechanism that rises not is that simple change pivoting point can solve, if pivoting point is changed, will make the contraction in length of carrying arm, carry arm in case shorten, the distance that the top is risen in the heart is subjected to serious restriction, and the functions of use of jack is reduced more.

Main purpose of the present utility model provides a kind of modified form scissors-type jack, and this very heavy top ventricle is the design of syllogic, carries arm and the pivot joint of the lower raising arm centre of the mechanism that rises, and when making the mechanism that rises up mobile, can carry bigger weight.

The technical solution of the utility model is to provide a kind of modified form scissors-type jack, this jack has a base, base one end is provided with hoisting device and grease chamber, base end in addition is provided with the mechanism that rises, rise and be provided with the top ventricle in the mechanism, ventricle top, top end in the heart is provided with connecting base, connecting base is to carry the lower raising arm that arm articulates the mechanism that rises, lower raising arm one end is installed in base position, other articulates with the arm that raises up by end, and the arm upper end that raises up is provided with pushes up the piece of pulling, and it is characterized in that: the top ventricle is a syllogic, in body, be provided with the two top hearts, put forward the centre that arm is articulated in lower raising arm.

Jack of the present utility model is compared with traditional jack shown in Figure 6, the utility model is mainly at the top ventricle and carry arm, improve between lower raising arm, the utility model not only will be put forward the centre that articulated section between arm and lower raising arm moves to lower raising arm, and for to make the hoisting depth of the mechanism that rises still can remain in the suitable scope, the top ventricle is designed to the kenel of syllogic, make the length lengthening of carrying arm with this, therefore when the user operates hoisting device, under same operation strength, can carry bigger weight, and make the lift of the mechanism that rises unaffected, and the scissors-type jack of a true tool practicality is provided.

Further specify specific structural features of the present utility model and purpose below in conjunction with accompanying drawing.

Brief Description Of Drawings: Fig. 1 is the schematic perspective view of the utility model scissors-type jack.Fig. 2 is the generalized section of the utility model scissors-type jack top ventricle.Fig. 3 is the plan sketch of the utility model scissors-type jack at collapse state.Fig. 4, the 5th, the action scheme drawing of the utility model scissors-type jack.Fig. 6 is the schematic perspective view of traditional scissors-type jack.Fig. 7 is the plan sketch of traditional scissors-type jack.

Please referring to shown in Figure 1, jack of the present utility model has a base 10, base 10 1 ends are provided with hoisting device 20, hoisting device 20 upper ends are provided with rocking handle 21, be provided with grease chamber 22 in hoisting device 20 1 sides, when rocking handle 21 is up mobile, high-voltage oil liquid in the grease chamber 22 is evacuated in the hoisting device 20 outward, and when rocking handle 21 down presses, high-voltage oil liquid is pushed to again rise in the top ventricle 40 of mechanism 30, the top heart 41 of top ventricle 40 upper ends is up pushed, be provided with blowdown valve 23 at base 10 sides in addition, during rotation blowdown valve 23, top ventricle 40 and grease chamber 22 are connected, high-voltage oil liquid is back in the grease chamber 22.

The main design of the utility model be to rise mechanism 30 and top ventricle 40 places, top ventricle 40 is positioned at the centre of the mechanism 30 that rises, please referring to shown in Figure 2, it has body 41, be provided with the two intercept form top hearts 42 in the body 41,43, form the kenel of syllogic, top, the upper end heart 43 and a connecting base 44 are fixed, connecting base 44 both sides respectively are pivoted and carry arm 31, end is with the centre pivot joint of lower raising arm 32 in addition to carry arm 31, and lower raising arm 32 lower ends articulate with base 10, and the upper end then articulates with arm 33 1 ends that raise up, arm 33 upper ends that raise up then articulate with pull piece 34 of top, and form the mechanism 30 that rises of connecting rod kenel.

Be the rise action kenel of mechanism of clear expression, Fig. 3, Fig. 4 and Fig. 5 use the structure of the mechanism that rises to explain, and the structure of hoisting device is not expressed, when jack folds, it is the kenel that is shown in Figure 3, push up the piece 34 of pulling this moment and drop to the lower position, the state that arm 33 and lower raising arm 32 be almost and close raises up, when hoisting device 20 is sent into high-voltage oil liquid in the top ventricle 40, earlier with the top heart 42,43 whiles are jack-up up, as shown in Figure 4, the connecting base 44 that up moves this moment drives simultaneously to be carried arm 31 lower raising arm 32 is up drawn, the arm 33 that raises up is up moved simultaneously, when the top heart 42 up moves to upper limit position and continue simultaneously rocking handle 21 repetitiousness are pressed, the top heart 43 is up moved separately, drive by connecting base 44 equally and carry arm 31, lower raising arm 32, the arm 33 that raises up moves up, as shown in Figure 5, reach the purpose that rises, pull piece 34 with automobile or other weight jack-up by the top, and when wanting to descend, rotation blowdown valve 23, the gravity that top ventricle 40 is born because of the perforation of oil circuit because of the upper end, and descend gradually, the fluid in the top ventricle 40 then is back in the grease chamber 22.

Claims (1)

1. modified form scissors-type jack, this jack has a base, base one end is provided with hoisting device and grease chamber, base end in addition is provided with the mechanism that rises, rise and be provided with the top ventricle in the mechanism, ventricle top, top end in the heart is provided with connecting base, connecting base is to carry the lower raising arm that arm articulates the mechanism that rises, lower raising arm one end is installed in base position, other articulates with the arm that raises up by end, and the arm upper end that raises up is provided with pushes up the piece of pulling, and it is characterized in that: the top ventricle is a syllogic, in body, be provided with the two top hearts, put forward the centre that arm is articulated in lower raising arm.

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