CN2581419Y

CN2581419Y - Double nut transmission for screw jack

Info

Publication number: CN2581419Y
Application number: CN 01271811
Authority: CN
Inventors: 陈博
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-11-26
Filing date: 2001-11-26
Publication date: 2003-10-22
Anticipated expiration: 2011-11-26

Abstract

The utility model relates to a screw jack, which particularly relates to a double nut transmission device for the screw jack in a tool along with a car. A screw rod of the device is provided with two parts of different disclination screw threads, and the two different disclination nut are connected by the screw threads of the screw rod. By the rotation of the screw rod, the two different disclination nut on the screw rod are simultaneously approached or separated, so that the jack rapidly raises or lands to restore. Compared with the single nut transmission device for the screw jack of the prior art, the utility model has the advantages that the work efficiency is enhanced one time.

Description

The female driving device of lifting screw mariages

The utility model relates to a kind of lifting screw driving device, especially the driving device of the lifting screw in the small passenger car driver's tool.

The driving device of the lifting screw in the small passenger car driver's tool is made up of four hold-down arms, left-handed screw mandrel, the left-handed screw of screw thread of screw thread at present.Four hold-down arms become the rhombus of symmetry to connect by four hinges, and screw is fixed therein on the hinge, and screw mandrel passes screw, and the other end of screw mandrel rocking arm coupling end is rotatably mounted on the symmetric hinged of screw hinge.By the rocking arm cw or rotate counterclockwise screw mandrel, change the rhombus catercorner length that four hold-down arms are formed, jack is hoisted or land recovery.This jack driving device, the screw mandrel of rotation only change the cornerwise length of rhombus by a screw, thus its hoist or the speed of restoring of landing slow, inefficiency.

The utility model purpose provides the female driving device of a kind of lifting screw mariages, and it can change the rhombus catercorner length that four hold-down arms are formed effectively, apace, reach that jack hoists fast or fast landing restore.

The utility model purpose is achieved in that on the symmetric hinged of the hinge of the fixing left-handed screw of existing lifting screw, the screw that to install and fix a thread rotary orientation again be dextrorotation, the wire rod thread rotation direction be processed near screw mandrel rocking arm coupling end half for left-handed, second half is for dextrorotation, screw mandrel moves in the screw of two different rotation directions simultaneously.When cw or rotate counterclockwise screw mandrel rocking arm coupling end, the screw that two rotation directions are opposite drive separately hinge near or away from, thereby realize hoisting or landing recovery of lifting screw.

The utility model is because only need to increase a right handed nuts on original lifting screw driving device, original wire rod thread rotation direction be processed into half for left-handed, half is dextrorotation, so simple in structure; Rotatablely moving of one rhizoid bar drives the straight-line motion of two screws simultaneously, so driving efficiency doubles.

The utility model concrete structure is provided by following examples and accompanying drawing.

Fig. 1 is the front elevation according to the female driving device of the lifting screw mariages that the utility model proposes;

Fig. 2 is the female and screw mandrel connection structure cutaway view of mariages in the driving device that the utility model proposes.

Describe the details and the service condition of the driving device that the utility model proposes in detail below in conjunction with Fig. 1, Fig. 2.

Fig. 1 shows the structure of the driving device that the utility model proposes.This device comprises hold-down arm (2), hold-down arm (5), hold-down arm (7), hold-down arm (11), left-handed screw (10), right handed nuts (3), hinge (1), hinge (4), hinge (6), hinge (8), screw mandrel (9).Hold-down arm (2) is connected by hinge (1) with hold-down arm (11), hold-down arm (5) is connected by hinge (6) with hold-down arm (7), hold-down arm (2) is connected by hinge (4) with hold-down arm (5) and right handed nuts (3), hold-down arm (7) is connected by hinge (8) with hold-down arm (11) and left-handed screw (10), and screw mandrel (9) is threaded by it with left-handed screw (10) and right handed nuts (3).

Fig. 2 show screw mandrel in this driving device structure and with being connected of screw.Screw mandrel (9) is made up of rocking arm coupling end (12), the left-handed part of screw thread (13), screw thread dextrorotation part (15) and the excessive part of screw thread (14), and left-handed screw (10) and right handed nuts (3) are respectively on left-handed part of the screw thread of screw mandrel (13) and screw thread dextrorotation part (15).For easy to use, when reaching the rocking arm coupling end (12) when clickwise screw mandrel (9), jack is the mode of operation that hoists, and the left-handed part of wire rod thread (13) should be positioned at the screw thread of the rocking arm coupling end (12) of screw mandrel and screw mandrel excessively between the part (14).

Clockwise rotate screw mandrel (9) by jack rocking arm (not drawing among the figure), left-handed screw (10) is mutual, simultaneously close with right handed nuts (3), and jack is hoisted, otherwise the jack landing is restored.

Claims

1. the female driving device of a lifting screw mariages, this device has hold-down arm (2), hold-down arm (5), hold-down arm (7), hold-down arm (11), left-handed screw (10), hinge (1), hinge (4), hinge (6), hinge (8), screw mandrel (9), hold-down arm (2) is connected by hinge (1) with hold-down arm (11), hold-down arm (5) is connected by hinge (6) with hold-down arm (7), hold-down arm (7) is connected by hinge (8) with hold-down arm (11) and left-handed screw (10), hold-down arm (2) is connected by hinge (4) with hold-down arm (5), screw mandrel (9) is threaded by it with left-handed screw (8), it is characterized in that: go up connection one right handed nuts (3) at hinge (4), screw mandrel (9) has left-handed part of screw thread (13) and screw thread dextrorotation part (15), and right handed nuts (3) is threaded by it with the screw thread dextrorotation part (15) of screw mandrel (9).

2. the rocking arm coupling end (12) that the female driving device of lifting screw mariages according to claim 1, the left-handed part of screw thread (13) that it is characterized in that screw mandrel (9) are positioned at screw mandrel and the screw thread of screw mandrel are excessively partly between (14).