CN217377153U

CN217377153U - Scissor jack

Info

Publication number: CN217377153U
Application number: CN202220043888.7U
Authority: CN
Inventors: 孙兆润; 孙建; 韩琪
Original assignee: Qingdao Zhaorun Auto Parts Co ltd
Current assignee: Qingdao Zhaorun Auto Parts Co ltd
Priority date: 2022-01-07
Filing date: 2022-01-07
Publication date: 2022-09-06
Anticipated expiration: 2032-01-07

Abstract

The utility model discloses a scissor jack, including chassis, lower support arm, last support arm, jack-up frame, two-way threaded rod and supplementary supporting mechanism, the lower support arm has two sets ofly, and the symmetry is established in chassis top both sides, and the lower extreme of two sets of lower support arms is articulated with the both sides of chassis respectively, and every group lower support arm includes two lower support arms. The upper supporting arms are two and symmetrically arranged on two sides of the bottom of the jacking frame. The upper ends of the two lower supporting arms in the same group are rotationally connected with the lower end of the upper supporting arm through a rotating shaft, and the two ends of the bidirectional threaded rod are in threaded fit with the two rotating shafts respectively. Both sides all are equipped with supplementary supporting mechanism around the chassis, and two supplementary supporting mechanism link to each other through the trace of establishing in last support arm. The utility model discloses a linkage pole decomposes the pressure of upper bracket arm, when maintaining jack-up state, has reduced the pressure of two-way threaded rod, prolongs the life of two-way threaded rod, can lift the target object of bigger quality.

Description

Scissor jack

Technical Field

The utility model relates to a jack technical field, concretely relates to shear formula jack.

Background

Scissor jacks are a type of jack that is called a scissor jack because of its structural appearance like scissors. The scissor jack is also called a support jack, is light and fast to use, is a vehicle-mounted product in various domestic automobile factories, and consists of an upper support rod and a lower support rod which are made of metal plates, the working principles are different, the cross section of the upper support rod and the cross section of the lower support rod at the tooth part and the part near the tooth part are rectangles with one sides opened, the metal plates at two sides of the opening are bent inwards, the teeth on the upper support rod and the lower support rod are made of the metal plates with two sides opened and bent, and the tooth width is larger than the metal plate thickness.

When the existing scissor jack is used, the angles of the two supporting rods are changed through the bidirectional threaded rod, a target object is lifted, after the object is lifted, the pressure of the object can be born through the threads on the bidirectional threaded rod after the supporting rods are decomposed, and when the object faces a heavier object or exceeds the use limit, the threads on the bidirectional threaded rod can be damaged, so that the supporting function of the jack is failed, and accidental injury and/or economic loss are caused. Thus, further improvements and enhancements are needed in the art.

SUMMERY OF THE UTILITY MODEL

Problem to exist among the prior art, the utility model aims to provide a scissor jack, through pulling extension rod and fixed box, make the relative length of extension rod change, the extension rod of removal will change the angle of connecting rod No. one, the angle of connecting rod No. two connecting rods are changed again to a connecting rod, make the trace between No. two connecting rods decompose the pressure that the upper boom needs to bear, make the jack when maintaining the jack-up state, the pressure that the two-way threaded rod needs to bear reduces, the life of extension two-way threaded rod, also can lift the target object of bigger quality simultaneously.

In order to solve the above problem, the utility model adopts the following technical scheme:

the scissor jack comprises an underframe, two groups of lower supporting arms, an upper supporting arm, a jacking frame, a bidirectional threaded rod and an auxiliary supporting mechanism, wherein the two groups of lower supporting arms are symmetrically arranged on the left side and the right side above the underframe, and the lower ends of the two groups of lower supporting arms are respectively hinged with the left side and the right side of the underframe.

Go up the support arm and have two, two go up the support arm and be located the top of two sets of lower support arms respectively, and bilateral symmetry arranges, has seted up on the last support arm and has run through the groove.

The jacking frame is positioned above the upper supporting arms, the upper ends of the two upper supporting arms are respectively hinged with the two sides of the jacking frame, and the lower ends of the upper supporting arms are respectively connected with the upper ends of a group of lower supporting arms at the same side through a rotating shaft in a rotating manner.

A bidirectional threaded rod is arranged between the two rotating shafts, the bidirectional threaded rod is perpendicular to the rotating shafts, and two ends of the bidirectional threaded rod penetrate through the two rotating shafts respectively and are in threaded fit with the rotating shafts.

The two auxiliary supporting mechanisms are oppositely arranged on the front side and the rear side of the chassis, the lower ends of the two auxiliary supporting mechanisms are fixed on the chassis, and the upper ends of the two auxiliary supporting mechanisms are connected through a linkage rod located in the through groove.

Furthermore, each group of lower support arms comprises two lower support arms which are oppositely arranged in the front and the back, the lower ends of the lower support arms in the same group are respectively connected with the front and the back side walls of the underframe in a rotating way, and the upper ends of the lower support arms are connected with the rotating shaft in a rotating way.

Further, supplementary supporting mechanism includes elastic connection subassembly, two connecting rods, No. two connecting rods, the lower extreme of a connecting rod rotates with the chassis through the installation base and links to each other, and two connecting rods rotate to be connected in one side outer wall of installation base, two the spout has all been seted up to one side outer wall of a connecting rod.

Two No. two the connecting rod rotates to be connected in the outer wall of one side that corresponds a connecting rod, and the one end of two No. two connecting rods and the rotation of the outer wall of one side that corresponds the support arm down are connected, two the outer wall of one side of No. two connecting rods and the outer wall sliding connection of one side that corresponds the pivot.

Further, elastic connection subassembly includes fixed box, spring, two sliders and two extension rods, two the slider slides respectively and sets up in the spout that corresponds, two the extension rod is all fixed in one side outer wall that corresponds the slider through the restriction bolt.

The fixed box is movably sleeved between the outer walls of the two extension rods, the spring is arranged inside the fixed box, and two ends of the spring are fixedly connected with one ends of the corresponding extension rods respectively.

Furthermore, the through groove is a long strip-shaped through hole, and the extending direction of the through hole is consistent with the length direction of the upper supporting arm.

Two ends of the linkage rod penetrate through the front side wall and the rear side wall of the upper supporting arm and are fixedly connected with the upper ends of the two connecting rods corresponding to the two auxiliary supporting mechanisms respectively.

Furthermore, the outer walls of the two ends of the linkage rod are in threaded connection with two adjusting bolts, and the two adjusting bolts are fixedly connected with the upper end of the second connecting rod.

Furthermore, one end of the bidirectional threaded rod is fixedly connected with a rotating ring, and a rotating rod is movably inserted in the rotating ring.

Furthermore, the other end fixedly connected with stopper of two-way threaded rod.

By adopting the technical scheme, the utility model discloses a beneficial technological effect is: this scissor jack is through pulling extension rod and fixed box for the relative length of extension rod changes, and the extension rod of removal will change the angle of connecting rod No. one, and the angle of connecting rod No. two is changed again to connecting rod No. one, makes the trace between the connecting rod No. two decompose the pressure that the upper support arm needs to bear, makes the jack when maintaining the jack-up state, and the pressure that the two-way threaded rod needs to bear reduces, prolongs the life of two-way threaded rod, also can lift the target object of bigger quality simultaneously.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the utility model with the fixed cover plate removed.

Fig. 3 is a schematic structural view of fig. 2 after the fixing box and the extension rod are further removed.

The reference numbers in the figures illustrate: 1. a chassis; 2. a lower support arm; 3. a rotating shaft; 4. an upper support arm; 5. a jacking frame; 6. a bidirectional threaded rod; 7. an auxiliary support mechanism; 701. installing a base; 702. a first connecting rod; 703. a second connecting rod; 704. a slider; 705. an extension pole; 706. a fixing box; 707. a spring; 708. a linkage rod; 709. adjusting the bolt; 8. and (4) rotating the rod.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention. Obviously, the described embodiment is only a partial embodiment of the present invention, and not an embodiment of the whole component, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or may be connected by interconnecting components in two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

referring to fig. 1-3, a scissor jack includes: chassis 1, lower support arm 2, go up support arm 4 and two supplementary supporting mechanism 7, lower support arm 2 has two sets ofly, and the symmetry sets up the left and right sides in chassis 1 top, and the lower extreme of two sets of lower support arms 2 is articulated with chassis 1's the left and right sides respectively.

Go up support arm 4 and have two, two go up support arm 4 and be located the top of two sets of lower support arms 2 respectively, and bilateral symmetry arranges, has seted up on going up support arm 4 and has run through the groove. The jacking frame 5 is located above the upper supporting arms 4, the upper ends of the two upper supporting arms 4 are hinged to the two sides of the jacking frame 5 respectively, the lower ends of the upper supporting arms 4 are connected with the upper ends of a group of lower supporting arms 2 on the same side through a rotating shaft 3 respectively in a rotating mode, and the upper supporting arms 5 are provided with penetrating grooves. Each group of lower support arms 2 comprises two lower support arms 2 which are oppositely arranged in the front and the back, the lower ends of the lower support arms 2 in the same group are respectively connected with the front and the back side walls of the chassis 1 in a rotating way, and the upper ends of the lower support arms are connected with the rotating shaft 3 in a rotating way.

A bidirectional threaded rod 6 is arranged between the two rotating shafts 3, the bidirectional threaded rod 6 is perpendicular to the rotating shafts 3, and two ends of the bidirectional threaded rod penetrate through the two rotating shafts 3 respectively and are in threaded fit with the rotating shafts 3.

Specifically, please refer to the figure, one end of the bidirectional threaded rod 6 is fixedly connected with a rotating ring, a rotating rod 8 is movably inserted in the rotating ring, and the other end of the bidirectional threaded rod 6 is fixedly connected with a limiting block. In this embodiment, set up bull stick 8 through the change, bull stick 8 can do benefit to the operator and use two-way threaded rod 6, restricts the maximum stroke of lower support arm 2 through the stopper.

The number of the auxiliary supporting mechanisms 7 is two, the two auxiliary supporting mechanisms 7 are oppositely arranged on the front side and the rear side of the underframe 1, the lower ends of the two auxiliary supporting mechanisms 7 are fixed on the underframe 1, and the upper ends are connected through a linkage rod 708 positioned in the through groove. Supplementary supporting mechanism 7 includes elastic connection subassembly, two connecting rods 702 and two connecting rods 703 No. two, the lower extreme of a connecting rod 702 rotates with chassis 1 through installation base 701 and links to each other, two connecting rods 702 rotate to be connected in one side outer wall of installation base 701, the spout has all been seted up to one side outer wall of two connecting rods 702, two connecting rods 703 rotate to be connected in one side outer wall that corresponds a connecting rod 702, and the one end of two connecting rods 703 rotates with one side outer wall that corresponds lower support arm 2 to be connected, one side outer wall of two connecting rods 703 and one side outer wall sliding connection that corresponds pivot 3.

In the embodiment of the present invention, the scissor jack disclosed in this embodiment realizes the basic function of the jack by the cooperation between the bottom frame 1, the lower support arm 2, the rotating shaft 3, the upper support arm 4 and the bidirectional threaded rod 6, the rotating rod 8 can facilitate the operation of the bidirectional threaded rod 6 by the operator, when an object with larger mass needs to be supported, the bidirectional threaded rod 6 is first rotated to lift the target object by the rotating shaft 3 and the upper support arm 4, then the extension rod 705 and the fixing box 706 are pulled, two limit bolts matched with the sliding piece 704 are arranged inside the extension rod 705, the two sliding pieces 704 slide in the sliding groove, so that the relative length of the extension rod 705 outside the fixing box 706 changes, after the current situation is adapted, the limit bolts are rotated to fix the positions of the sliding piece 704 and the extension rod, and due to the relative angle of the sliding groove 705, the sliding piece 704 cannot move in the sliding groove under the influence of gravity, the angle of the first connecting rod 702 is changed by the moving extension rod 705, the angle of the second connecting rod 703 is changed by the first connecting rod 702, the pressure required to be borne by the upper supporting arm 4 is decomposed by the linkage rod 708 between the second connecting rods 703, and when the second connecting rod 703 moves to the angle capable of bearing the pressure, the adjusting bolt 709 is rotated, so that the position of the linkage rod 708 is fixed, when the jack maintains a jacking state, the pressure required to be borne by the bidirectional threaded rod 6 is reduced, the service life of the bidirectional threaded rod 6 is prolonged, and meanwhile, a target object with larger mass can be lifted.

Specifically, as shown in the figure, the elastic connection assembly includes two sliding members 704, two extension rods 705, a fixing box 706 and a spring 707, the two sliding members 704 are respectively slidably disposed in the corresponding sliding grooves, the two extension rods 705 are fixed to the outer wall of one side of the corresponding sliding member 704 through a limiting bolt, the fixing box 706 is movably sleeved between the outer walls of the two extension rods 705, the spring 707 is disposed inside the fixing box 706, and two ends of the spring 707 are respectively fixedly connected to one end of the corresponding extension rod 705.

In this embodiment, the extension rod 705 is mounted through the slider 704, the slider 704 is trapezoidal, a threaded hole is formed in the slider 704, the slider 704 and the extension rod 705 are connected through a limiting bolt, the extension rod 705 and the limiting bolt are not in threaded connection, the spring 707 is used for ejecting the two extension rods 705, and the box 706 is fixed and used for protecting the spring 707 and limiting the movement track of the extension rod 705 to keep the same.

Specifically, as shown in the figure, a linkage rod 708 is fixedly connected between the outer walls of one side of the two corresponding second connecting rods 703, and both the two linkage rods 708 are disposed in the corresponding through grooves.

In this embodiment, the two second connecting rods 703 are linked by the linking rod 708, and the pressure applied to the second supporting frame 4 is decomposed and borne to some extent, so that the linking rod 708 can move in the through groove.

Specifically, as shown in the figure, two adjusting bolts 709 are connected to the outer walls of the two linking rods 708 through threads.

In this embodiment, two linkage rods 708 are fixed by the adjusting bolt 709, and the adjusting bolt 709 and the outer wall of one side of the limiting bolt are both provided with a gasket to improve the fixing effect.

The working principle is as follows: the basic function of the jack is realized through mutual cooperation between the underframe 1, the lower support arm 2, the rotating shaft 3, the upper support arm 4 and the bidirectional threaded rod 6, the rotating rod 8 can enable an operator to operate the bidirectional threaded rod 6 more conveniently, when an object with larger mass needs to be supported, the bidirectional threaded rod 6 is firstly rotated, the rotating shaft 3 and the upper support arm 4 lift a target object, then the extension rod 705 and the fixed box 706 are pulled, two limit bolts matched with the sliding piece 704 are arranged inside the extension rod 705, the two sliding pieces 704 slide in the sliding groove, the relative length of the extension rod 705 outside the fixed box 706 is changed, after the current situation is adapted, the limit bolts are rotated, the positions of the sliding piece 704 and the extension rod are fixed, meanwhile, due to the relative angle of the sliding groove, the sliding piece 704 cannot move in the sliding groove 705 by itself under the influence of gravity, the angle of the first connecting rod 702 is changed by the movable extension rod 705, and the angle of the second connecting rod 703 is changed by the first connecting rod 702, so that the pressure required to be borne by the upper support arm 4 is decomposed by the linkage rod 708 between the second connecting rods 703, and when the second connecting rod 703 moves to the angle capable of bearing the pressure, the adjusting bolt 709 is rotated, so that the position of the linkage rod 708 is fixed, and when the jack is in a jacking state, the pressure required to be borne by the bidirectional threaded rod 6 is reduced, the service life of the bidirectional threaded rod 6 is prolonged, and meanwhile, a target object with larger quality can be lifted.

The utility model discloses a control mode is controlled through artifical start-up and closing switch, and the wiring diagram of power component and the supply of power belong to the common general knowledge in this field, and the utility model discloses mainly be used for protecting mechanical device, so the utility model discloses no longer explain control mode and wiring in detail and arrange.

The above description is only the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the improvement concept of the present invention within the technical scope disclosed in the present invention.

Claims

1. The scissor jack is characterized by comprising an underframe, two groups of lower supporting arms, an upper supporting arm, a jacking frame, a bidirectional threaded rod and an auxiliary supporting mechanism, wherein the two groups of lower supporting arms are symmetrically arranged on the left side and the right side above the underframe, and the lower ends of the two groups of lower supporting arms are respectively hinged with the left side and the right side of the underframe;

the two upper supporting arms are respectively positioned above the two groups of lower supporting arms and are arranged in a bilateral symmetry manner, and the upper supporting arms are provided with penetrating grooves;

the jacking frame is positioned above the upper supporting arms, the upper ends of the two upper supporting arms are respectively hinged with the two sides of the jacking frame, and the lower ends of the upper supporting arms are respectively rotatably connected with the upper ends of a group of lower supporting arms at the same side through a rotating shaft;

a bidirectional threaded rod is arranged between the two rotating shafts, the bidirectional threaded rod is perpendicular to the rotating shafts, and two ends of the bidirectional threaded rod respectively penetrate through the two rotating shafts and are in threaded fit with the rotating shafts;

two auxiliary supporting mechanisms are arranged on the front side and the rear side of the chassis oppositely, the lower ends of the two auxiliary supporting mechanisms are fixed on the chassis, and the upper ends of the two auxiliary supporting mechanisms are connected through a linkage rod located in the through groove.

2. The scissor jack of claim 1, wherein each of the lower support arms comprises two lower support arms disposed in a front-to-back manner, the lower ends of the lower support arms of the same set being rotatably coupled to the front and rear sidewalls of the base frame, respectively, and the upper ends of the lower support arms of the same set being rotatably coupled to the pivot shaft.

3. The scissor jack of claim 1, wherein the auxiliary support mechanism comprises an elastic connection assembly, two first connecting rods and two second connecting rods, the lower ends of the first connecting rods are rotatably connected with the underframe through the mounting base, the two first connecting rods are rotatably connected with the outer wall of one side of the mounting base, and the outer wall of one side of each of the two first connecting rods is provided with a sliding groove;

4. The scissor jack of claim 3, wherein the elastic connection assembly comprises a fixed box, a spring, two sliding members and two extension rods, the two sliding members are slidably disposed in the corresponding sliding grooves, and the two extension rods are fixed to one outer wall of the corresponding sliding members through limiting bolts;

the fixed box is movably sleeved between the outer walls of the two extension rods, the spring is arranged in the fixed box, and two ends of the spring are fixedly connected with one ends of the corresponding extension rods respectively.

5. A scissor jack according to claim 3, wherein the through slot is an elongate through hole extending in the same direction as the length of the upper support arm;

two ends of the linkage rod penetrate through the front side wall and the rear side wall of the upper supporting arm and are fixedly connected with the upper ends of the second connecting rods corresponding to the two auxiliary supporting mechanisms respectively.

6. The scissor jack of claim 5, wherein two adjusting bolts are threadedly connected to outer walls of both ends of the linkage, and are fixedly connected to upper ends of the second link through the adjusting bolts.

7. The scissor jack of claim 1, wherein a swivel is fixedly coupled to an end of the bi-directional threaded rod, and a swivel is movably inserted into the swivel.

8. The scissor jack of claim 7, wherein a stop block is fixedly attached to the other end of the bi-directional threaded rod.