CN2134385Y

CN2134385Y - Simple hoisting jack

Info

Publication number: CN2134385Y
Application number: CN 92223089
Authority: CN
Inventors: 黄陈淑霞
Original assignee: 黄陈淑霞
Current assignee: Li Lianding; Xu Rencong
Priority date: 1992-06-09
Filing date: 1992-06-09
Publication date: 1993-05-26
Anticipated expiration: 2002-06-09

Abstract

The utility model relates to a simple hoisting jack. The lower end of a jacking frame is pivoted at the center of an under frame, while a lifting platform and a turn-buckle are respectively pivoted at the different parts of the upper end of the jacking frame. A liner bushing is additionally arranged between the contact surfaces of the turn-buckle and the jacking frame to intensify the abrasion-resistance of the contact surfaces. A screw rod is matched in the turn-buckle, while the upper end of the screw rod is fixed in the preinstalled axletree of a pivot that is pivoted at the upper end of the under frame. Simultaneously, the upper end of the screw rod is designed to be polygon so as to match the sleeve barrel of a crank handle or a motor to drive the screw rod. When lifting the jacking frame, the crank handle or the motor has not to follow the screw rod to move backward axially, which makes the operation more convenient. Additionally, a folding supporting frame is arranged on the under frame to temporarily support the under frame so that human power need not to continuously maintain a supporting state, which saves labor and makes use of the simple hoisting jack more convenient.

Description

Simple hoisting jack

The utility model relates to a kind of simple and easy jack, refers in particular to it and can cooperate wind or electro-motor to do transmission, and is just more convenient, more durable when using like this.

The present utility model people once applied for a patent with a kind of structure of simple and easy jack, and this simple and easy jack is to comprise a lower end to be provided with the underframe of an aerofoil for kiss the earth, articulates the swivel nut with negative thread in the underframe upper end; A upper end articulates a lifting and closes with the support unit bottom, and lower ending pivot is connected to the jacking frame of underframe central authorities; One is passed swivel nut and front end and is articulated in the jacking frame upper end, and the screw rod that the rear end articulates for wind in conjunction with a connecting strap; Borrow wind to rotate and the drive screw advance and retreat with the lift master lifting of control jacking frame.The degree of simplifying of this structure has reached the significantly purpose of cost-cutting really, and excellent Practical Performance also quite obtains favorable comment, market response is splendid, but should be only applicable to the wind transmission by elder generation's pre-structure, then inapplicable for general electric motor driven sleeve, so rely on the degree of manpower overweight, range of use is too insular, and when using joystick to rotate, spiro rod rear end can extend axially backward along with the jacking frame elevate a turnable ladder, so operator's hand also must be along with moving backward, cause taking thereupon of space to increase, this situation inconvenient operation that under the limited environment in space, just seems, and also the result that screw rod extends back must cause the rear end arm of force excessive, no matter all make screw rod produce vibration easily and cause operation inconvenience, and influence part life with manual or motor-driven screw rod; Do not set up other abrasive resistant materials because of each pivot joint part primary member directly has do contact friction again,, produce shaking phenomenon so the gap of part is increased.

Therefore, main purpose of the present utility model is, a kind of simple and easy jack is provided, make its sleeve that can cooperate wind or electrical motor with drive screw, when the jacking frame elevate a turnable ladder, wind or electrical motor do not need to move axially backward and move with screw rod, make operation more convenient, by reducing the wearing and tearing that respectively articulate the part primary member, prolong the service life of product.

The technical measures of being taked that achieve the above object are:

Swivel nut is hubbed at the upper end of jacking frame, and the front end male thread portion of screw rod is matched with in the negative thread of swivel nut, and the rear end of screw rod is fixed in the default bearing that is hubbed on end pivoting on the underframe, when thereby screw rod rotates the lifting of drive jacking frame, the axial advance and retreat of the fore-end work rear end part of screw rod is then maintained static, make the position at operator place unlikely more convenient thus thereupon increasing space hold, and when using direct motor drive, can not produce axially rocking of screw rod, and cause the phenomenon built on the sand of jack.

Wherein the rearward end of this screw rod is to be set as the polygon that can cooperate general sleeve-shaped, so that can be applicable to wind or the direct motor drive with sleeve.

Between swivel nut and contact surface that jacking frame cooperates, have additional lining, so that strengthen its endurance, can not make the part joint not close because of the swivel nut wearing and tearing, produce the gap and rock, and when wearing and tearing, only need also more that rebush gets final product, need not change primary member, so can prolong the service life of product and alleviate customer's economical burden.

Be pivoted with a collapsible bracing frame at the underframe appropriate location, so that when initially lift master being withstood carriage underframe, provide the usefulness of temporary support, and do not need to make bracketing constantly, thereby strengthened practicality and comfort feature with manpower.

Now an embodiment of the present utility model is further described in conjunction with following accompanying drawing.

Fig. 1 represents the utility model single-piece block diagram and action scheme drawing,

Fig. 2 represents the three-dimensional exploded view that jacking frame of the present utility model cooperates lining and swivel nut to articulate.

At first as shown in Figure 1, yet jack of the present utility model is provided with and is provided with its maximum difference of skidproof rubber pad below underframe 1, jacking frame 2, lift master 21 and a screw rod 3 with aerofoil 11 and the aerofoil 11 and is that underframe 1 upper end is pivoted with a pivot 12, is provided with bearing in addition in this pivot 12 and the rear end part of screw rod 3 wherein can be rotated in the bearing original place to be tightly fixed.In addition, be pivoted with a bracing frame 5 that is ㄇ shape in underframe 1 both sides, make the usefulness of temporary support when supplying originally lift master 21 to be aimed at carriage underframes, can save the trouble of manpower bracketing, then provide support frame 5 by the extended projection 13 in underframe 1 both sides and lift when straight, and this bracing frame 5 can be folded when finishing using by solid usefulness; Moreover, the lower end of jacking frame 2 is the central portions that are articulated in underframe 1, the upper end then is provided with breach 20 and hole 201, respectively in order to the sheathed lining 22 and the lift master 21 that is pivoted, wherein, this lift master 21 is to be arranged to U-shaped like but opening is little form than the bottom with the plastic steel material, makes it increase frictional area, fixes so that adapt to the carriage underframe position more easily; In addition, this lining 22 is to be set as the shape that both sides have arc recess 221 and arc flange 222, embedding breach 20 by means of 221 pressings of arc recess fixes, both sides being provided with scrobicular ring 231 is pressed in the lining 22 corresponding to the swivel nut 23 that arc flange 222 has negative thread 232 again, make lining 22 free to rotate in breach 20, the swivel nut 23 that is fixed in lining 22 then rotates thereupon, therefore can avoid swivel nut 23 wearing and tearing (as shown in Figure 2), and this swivel nut 23 also makes with the plastic steel material, rotated more smooth and easy so that when cooperating screw rod 3 better lubricant effect arranges; Screw rod 3 lower ends have male thread portion and are matched with in the negative thread 232 of swivel nut 23, and the upper end is provided with the fit end 31 of corresponding general purpose tool sleeve-shaped, can be used for cooperating manually operated rocking handle 4 or direct motor drive screw rod 3, make it in the Applicable scope lifting, and when screw rod 3 rotates, this screw rod 3 is flexible vertically towards swivel nut 23 directions of front end, the jack that causes rocks unsteady phenomenon in the time of can reducing because of electrical motor fast driving screw rod, the rear end then maintains static, the operator needn't move along with the flexible of screw rod 3, has therefore reached and has used more convenient purpose.

Claims

1, a kind of simple and easy jack, the lower ending pivot that comprises a lower end to be provided with aerofoil and the upper end is provided with that the underframe of pivot, upper end are pivoted with lift master is connected to the jacking frame of underframe central authorities, a swivel nut with negative thread, a screw rod and passes swivel nut and pivot, it is characterized in that:

The both sides of underframe are pivoted with the middle section approximately

The bracing frame of shape is the form that can actuate, and the underframe both sides extend the projection of the solid bracing frame in top,

The radial direction of pivot is provided with the bearing that runs through,

Swivel nut is to cooperate a lining to be hubbed at the jacking frame upper end,

The front end of screw rod has the negative thread that male thread portion is matched with swivel nut, do not have a threaded portion and then be pressed on and be free to rotate in the bearing of pivot and make jacking frame make lifting action in the rear end, and the rearward end of this screw rod is provided with the fit end of corresponding tool roll barrel shape for cooperating manual rocking handle or electronic rocking bar.

2, by the described simple and easy jack of claim 1, it is characterized in that, the both sides, upper end of this jacking frame are provided with breach, and the arc recess that the both sides of lining are provided with corresponding breach is embedded in the breach, and the swivel nut both sides be provided with scrobicular ring be corresponding to by the formed arc flange of arc recess opposite side so that build-in.