CN110304572B

CN110304572B - Scissor jack

Info

Publication number: CN110304572B
Application number: CN201910698318.4A
Authority: CN
Inventors: 李玮
Original assignee: Jiaxing Jinteng Machinery Co ltd
Current assignee: Jiaxing Jinteng Machinery Co ltd
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2024-01-30
Anticipated expiration: 2039-07-31
Also published as: CN110304572A

Abstract

The invention discloses a scissor jack, which comprises a lower base, an upper base, a front connecting seat, a rear connecting seat, two upper supporting arms, two lower supporting arms, two connecting arms, a traction mechanism and two connecting mechanisms, wherein two ends of the lower supporting arm are respectively hinged with the base and the front connecting seat, two ends of the other lower supporting arm are respectively hinged with the base and the rear connecting seat, two ends of the upper supporting arm are respectively hinged with the upper base and the front connecting seat, two ends of the other upper supporting arm are respectively hinged with the upper base and the rear connecting seat, rotatable connecting arms are respectively arranged on the lower supporting arms in a crossing manner, and the upper ends of the connecting arms are provided with traction mechanisms for traction of the front connecting seat and the rear connecting seat.

Description

Scissor jack

[ field of technology ]

The invention relates to the technical field of jacks, in particular to the technical field of scissor jacks.

[ background Art ]

The jack is a light and small lifting device which uses a rigid jacking piece as a working device and jacks a heavy object in a stroke through a top bracket or a bottom supporting claw. The jack is mainly used for departments such as factories and mines, transportation and the like to repair vehicles and work such as other lifting and supporting. The structure is light, firm, flexible and reliable, and can be carried and operated by one person.

The existing scissor jack is used for lifting and descending the height by adjusting the bottom edges of the upper isosceles triangle and the lower isosceles triangle through a screw rod and a nut. Just like a tool ladder in normal life, the smaller the included angle between the two arms of the ladder is, the higher the ladder is, and the larger the included angle between the two arms of the ladder is, the lower the ladder is. In the use process, the jacking and dropping speeds are quite slow, so that the work efficiency is greatly affected by the slow rising and dropping of the scissor jack when the scissor jack is not contacted with a heavy object.

[ invention ]

The invention aims to solve the problems in the prior art and provides a scissor jack which can improve the working efficiency and save labor in use.

In order to achieve the above purpose, the invention provides a scissor jack, which comprises a lower base, an upper base, a front connecting seat, a rear connecting seat, two upper supporting arms, two lower supporting arms, two connecting arms, a traction mechanism and two connecting mechanisms, wherein two ends of the lower supporting arms are respectively hinged with the base and the front connecting seat, two ends of the other lower supporting arm are respectively hinged with the base and the rear connecting seat, two ends of the upper supporting arm are respectively hinged with the upper base and the front connecting seat, two ends of the other upper supporting arm are respectively hinged with the upper base and the rear connecting seat, rotatable connecting arms are respectively arranged on the lower supporting arms in a crossing manner, traction mechanisms for drawing the front connecting seat and the rear connecting seat are arranged at the upper ends of the connecting arms, the lower ends of the connecting arms are respectively connected with the lower base through the connecting mechanisms, and the traction mechanism is a traction mechanism with a pulley block.

Preferably, the traction mechanism comprises a shell, two movable pulley blocks, two fixed pulley blocks, a rotating shaft, two reels and a driving mechanism, wherein the rotating shaft is arranged on the shell, the reels are arranged in the shell, the fixed pulley blocks are arranged at the front end and the rear end of the shell, the movable pulley blocks are arranged at the inner sides of the front connecting seat and the rear connecting seat, the movable pulley blocks and the fixed pulley blocks which correspond to each other in front and rear form a pulley block, steel wire ropes are arranged on the pulley blocks, and the winding ends of the steel wire ropes penetrate through the side walls of the shell and are fixedly connected with the corresponding reels, and the driving mechanism for driving the rotating shaft to rotate is arranged on the shell.

Preferably, the driving mechanism comprises a crank, a shaft body, a driving gear and a driven gear, wherein the crank is arranged at the outer end of the shaft body, the driving gear is arranged at the inner end of the shaft body, and the driving gear is meshed and connected with the driven gear arranged on the rotating shaft.

Preferably, the gear ratio of the driving gear to the driven gear is: 1:5.

Preferably, the connecting mechanism comprises a sliding rail, a sliding seat and a fixing mechanism, wherein the sliding rail is arranged on the lower base, the sliding seat which can slide is matched and installed on the sliding rail, and the fixing mechanism which is connected with the sliding rail in a plugging mode is arranged on the sliding seat.

Preferably, the fixing mechanism comprises a latch body, a sleeve body, a first spring, a second spring, a bulge, a screw rod, a nut and a retainer ring, wherein the sleeve body is arranged on the sliding seat, the latch body is arranged in the sleeve body, the retainer ring is arranged in the upper end of the sleeve body, the latch body is provided with the bulge in the sleeve body, the first spring is arranged on the latch body between the bulge and the retainer ring, the screw rod is arranged at the upper end of the latch body, the nut is arranged on the screw rod, and the second springs with two ends respectively abutting against the sleeve body and the nut are arranged on the latch body.

Preferably, the lower end of the latch body is an inclined plane, and the upper end of the sliding rail is provided with splicing grooves which are uniformly distributed and matched with the insertion end of the latch body.

The invention has the beneficial effects that: according to the invention, the front connecting seat and the rear connecting seat are pulled to move in opposite directions through the pulling mechanism, and the pulley block and the gear transmission of the pulling mechanism are used for replacing the traditional screw rod and nut matching.

The features and advantages of the present invention will be described in detail by way of example with reference to the accompanying drawings.

[ description of the drawings ]

FIG. 1 is a schematic view of a scissor jack of the present invention;

FIG. 2 is an enlarged view of A in FIG. 1;

FIG. 3 is a partial top view of the pulling mechanism;

fig. 4 is a schematic structural view of the connection mechanism.

In the figure: 1-lower base, 2-upper base, 3-front connecting base, 4-rear connecting base, 5-upper supporting arm, 6-lower supporting arm, 7-connecting arm, 8-pulling mechanism, 9-connecting mechanism, 81-housing, 82-movable pulley block, 83-fixed pulley block, 84-wire rope, 85-rotation shaft, 86-reel, 87-driving mechanism, 871-crank, 872-shaft body, 873-driving gear, 874-driven gear, 91-slide rail, 92-slide seat, 93-fixing mechanism, 94-inserting groove, 931-inserting pin body, 932-sleeve body, 933-first spring, 934-second spring, 935-protrusion, 936-screw, 937-nut, 938-retaining ring.

[ detailed description ] of the invention

Referring to fig. 1, 2, 3 and 4, the scissor jack of the present invention comprises a lower base 1, an upper base 2, a front connecting seat 3, a rear connecting seat 4, two upper supporting arms 5, two lower supporting arms 6, two connecting arms 7, a pulling mechanism 8 and two connecting mechanisms 9, wherein two ends of the lower supporting arm 6 are respectively hinged with the base 1 and the front connecting seat 3, two ends of the other lower supporting arm 6 are respectively hinged with the base 1 and the rear connecting seat 4, two ends of the upper supporting arm 5 are respectively hinged with the upper base 2 and the front connecting seat 3, two ends of the other upper supporting arm 5 are respectively hinged with the upper base 2 and the rear connecting seat 4, rotatable connecting arms 7 are respectively arranged on the lower supporting arm 6 in a crossing manner, the upper ends of the connecting arms 7 are provided with pulling mechanisms 8 for pulling the front connecting seat 3 and the rear connecting seat 4, the lower end of the connecting arm 7 is connected with the lower base 1 through a connecting mechanism 9, the pulling mechanism 8 is a pulling mechanism with pulley blocks, the pulling mechanism 8 comprises a shell 81, two movable pulley blocks 82, two fixed pulley blocks 83, a rotating shaft 85, two reels 86 and a driving mechanism 87, the rotating shaft 85 is arranged on the shell 81, the reels 86 are arranged in the shell 81 by the rotating shaft 85, the fixed pulley blocks 83 are arranged at the front end and the rear end of the shell 81, the movable pulley blocks 82 are arranged at the inner sides of the front connecting seat 3 and the rear connecting seat 4, the movable pulley blocks 82 and the fixed pulley blocks 83 which correspond to each other from front to rear form a pulley block, the pulley blocks are provided with steel wire ropes 84, the winding ends of the steel wire ropes 84 penetrate through the side walls of the shell 81 and are fixedly connected with the corresponding reels 86, the shell 81 is provided with the driving mechanism 87 for driving the rotating shaft 85 to rotate, the driving mechanism 87 comprises a crank 871, a shaft body 872, a driving gear 873 and a driven gear 874, the crank 871 is arranged at the outer end of the shaft body 872, the driving gear 873 is arranged at the inner end of the shaft body 872, the driving gear 873 is meshed with the driven gear 874 arranged on the rotating shaft 85, and the gear ratio of the driving gear 873 to the driven gear 874 is as follows: 1:5, coupling mechanism 9 includes slide rail 91, slide 92 and fixed establishment 93, slide rail 91 establishes on lower base 1, the cooperation is installed slidable slide 92 on the slide rail 91, be equipped with the fixed establishment 93 of being pegged graft with slide rail 91 on the slide 92, fixed establishment 93 includes bolt 931, cover body 932, first spring 933, second spring 934, arch 935, screw 936, nut 937 and retaining ring 938, the cover body 932 is established on slide 92, be equipped with bolt 931 in the cover body 932, be equipped with retaining ring 938 in the upper end of cover body 932, be equipped with protruding 935 in the cover body 932, be equipped with first spring 933 on the bolt 931 between protruding 935 and the retaining ring 938, the upper end of bolt 931 is equipped with the screw rod 937 on the screw rod 936, be equipped with both ends respectively in cover body 932 and nut 931 7's second spring 934, the lower extreme of bolt 931 is the inclined plane, be equipped with evenly distributed and insert the groove 94 with the even end that cooperates of inserting of cover body 91.

The working process of the invention comprises the following steps:

in the working process of the scissor jack, a rocking handle 871 is rotated clockwise to drive a shaft body 872 to rotate, the shaft body 872 is matched with a driving gear 873 and a driven gear 874 to drive a rotating shaft 85 to rotate, the rotating shaft 85 drives a reel 86 to wind a steel wire rope 84, the steel wire rope 84 pulls a front connecting seat 3 and a rear connecting seat 4 to move oppositely through a movable pulley block 82, the upper ends of two lower supporting arms 6 are driven by the front connecting seat 3 and the rear connecting seat 4 to move close together, and the lower ends of two upper supporting arms 5 are driven by the front connecting seat 3 and the rear connecting seat 4 to move close together, so that the upper base 2 is lifted.

When the upper ends of the two lower supporting arms 6 are moved close, the two lower supporting arms 6 respectively drive the two connecting arms 7 to move, the two connecting arms 7 respectively pull the two sliding seats 92 to move towards each other, the sliding seats 92 drive the fixing mechanism 93 to move, when the plug pin body 931 corresponds to the plug slot 94, under the action of the first spring 933, the first spring 933 drives the plug pin body 931 to insert into the plug slot 94 through the protrusion 935, and because the lower end of the plug pin body 931 is an inclined plane, when the two sliding seats 92 move towards each other, the rear end of the plug slot 94 forces the plug pin body 931 to move upwards and compresses the first spring 933 through the protrusion 935, so that the two sliding seats 92 cannot be interfered to move towards each other, when the plug pin body 931 is inserted into the plug slot 94, the two sliding seats 92 reversely move, and at the moment, the two sliding seats 92 cannot reversely move, and the support and fix the lower supporting arm 6 through the connecting arms 7, so that the current height position of the upper base 2 is kept unchanged.

When the upper base 2 needs to descend, the nut 937 is rotated clockwise to move downwards to compress the second spring 934, so that the acting force of the second spring 934 on the nut 937 is larger than the acting force of the first spring 933 on the boss 935, then the ascending operation of the upper base 2 is performed, when the latch body 931 is not contacted with the front end of the inserting groove 94, the nut 937 pulls the latch body 931 to move upwards under the action of the second spring 934 through the screw 936, the latch body 931 moves out of the inserting groove 94, then the crank 871 is released, and at the moment, the upper base 2 descends by itself under the action of gravity.

The above embodiments are illustrative of the present invention, and not limiting, and any simple modifications of the present invention fall within the scope of the present invention.

Claims

1. A scissor jack, characterized in that: including lower base (1), upper base (2), preceding connecting seat (3), back connecting seat (4), two upper supporting arms (5), two lower supporting arms (6), two linking arms (7), traction mechanism (8) and two coupling mechanism (9), the both ends of lower supporting arm (6) are articulated with lower base (1) and preceding connecting seat (3) respectively, the both ends of another lower supporting arm (6) are articulated with lower base (1) and back connecting seat (4) respectively, the both ends of an upper supporting arm (5) are articulated with upper base (2) and preceding connecting seat (3) respectively, the both ends of another upper supporting arm (5) are articulated with upper base (2) and back connecting seat (4) respectively, all alternately be equipped with rotatable linking arm (7) on lower supporting arm (6), the upper end of linking arm (7) is equipped with traction mechanism (8) of traction front connecting seat (3) and back connecting seat (4), the lower end of linking arm (7) is articulated with lower base (1) and back connecting seat (4) respectively, the lower end of linking arm (7) is connected through coupling mechanism (9) and is with lower pulley block (8) respectively, and pulley block (8) are two pulley blocks (81), including two pulley blocks (82), pulley block (8) are connected Axis of rotation (85), two reel (86) and actuating mechanism (87), be equipped with axis of rotation (85) on casing (81), axis of rotation (85) are equipped with reel (86) in casing (81), both ends all are equipped with fixed pulley group (83) around casing (81), the inboard of preceding connecting seat (3) and back connecting seat (4) all is equipped with movable pulley group (82), corresponding movable pulley group (82) and fixed pulley group (83) form a assembly around, all be equipped with wire rope (84) on the assembly, the coiling end of wire rope (84) passes the lateral wall of casing (81) and reel (86) fixed connection that corresponds, be equipped with drive axis of rotation (85) pivoted actuating mechanism (87) on casing (81), actuating mechanism (87) include crank (871), axis of rotation (872), driving gear (873) and driven gear (874), the outer end of axis of rotation (872) is equipped with crank (871), the inner of axis of rotation (873) is equipped with driving gear (873), driven gear (874) are than driving gear (873), driven gear (874) are engaged with on driving gear (874). 1:5, coupling mechanism (9) include slide rail (91), slide (92) and fixed establishment (93), slide rail (91) are established on lower base (1), slidable slide (92) are installed in the cooperation on slide rail (91), be equipped with on slide (92) with slide rail (91) grafting be connected fixed establishment (93).

2. A scissor jack as claimed in claim 1, wherein: the fixing mechanism (93) comprises a latch body (931), a sleeve body (932), a first spring (933), a second spring (934), a boss (935), a screw rod (936), a nut (937) and a retainer ring (938), wherein the sleeve body (932) is arranged on the sliding seat (92), the latch body (931) is arranged in the sleeve body (932), a retainer ring (938) is arranged in the upper end of the sleeve body (932), the boss (935) is arranged in the sleeve body (932), the first spring (933) is arranged on the latch body (931) between the boss (935) and the retainer ring (938), the screw rod (936) is arranged at the upper end of the latch body (931), the nut (937) is arranged on the screw rod (936), and the second spring (934) with two ends respectively abutting against the sleeve body (932) and the nut (937) is arranged on the latch body (931).

3. A scissor jack as claimed in claim 2, wherein: the lower extreme of bolt body (931) is the inclined plane, the upper end of slide rail (91) is equipped with evenly distributed and with bolt body (931) insert end matched with grafting groove (94).