CN204689523U

CN204689523U - Jack

Info

Publication number: CN204689523U
Application number: CN201520212682.2U
Authority: CN
Inventors: 孙毅
Original assignee: Chang'an Chongqing Airport Vehicular Spare Parts LLC
Current assignee: Chang'an Chongqing Airport Vehicular Spare Parts LLC
Priority date: 2015-04-09
Filing date: 2015-04-09
Publication date: 2015-10-07
Anticipated expiration: 2025-04-09

Abstract

The utility model discloses a kind of jack, comprise upper supporting piece, lower support element, be arranged between described upper supporting piece and lower support element for driving the hold-down arm group of upper supporting piece and driving screw mandrel; Described hold-down arm group comprises hold-down arm and a pair lower support arm on a pair, the upper end of each upper hold-down arm all by upper riveting pin and described upper supporting piece hinged, connected by pivot shaft between the lower end of corresponding each upper hold-down arm and the upper end of each lower support arm, the back segment of screw mandrel is driven to be installed with annular slab, prop up annular slab and be embedded in a bearing seat, annular slab is installed in bearing seat by a bearing gland, and the inner bottom surface of annular slab medial surface and bearing seat and be provided with plane sliding bearing between annular slab lateral surface and bearing gland; Avoid bite, ensure that artificial drive torque effectively can be converted into effective torque, can rise valency jack easily, fast, and this apparatus structure is simple, cost of manufacture is low, easy to use, is beneficial to popularization.

Description

Jack

Technical field

The utility model hoisting device field, specifically a kind of jack.

Background technology

In the installation process of vehicle maintenance and repair or large-sized object, due to the heavier-weight of object, the general jack that adopts operates, to improve the comfort feature of production; The existing lifting screw used on market, be made up of four hold-down arms, a driving screw mandrel, four hold-down arms are by the symmetrically rhombus connection of four hinges, driving screw mandrel is passed in two hinges on same diagonal line, by cw or rotate counterclockwise driving screw mandrel, thus realize the lifting of whole jack; But, due in process of rising or falling, owing to driving screw mandrel except the rotation along own axes, also do translation simultaneously, make to drive the pivot shaft of screw mandrel and normal-running fit easily to occur bite, make rotary actuation screw mandrel discontinuous, cause drive efficiency not high.

Therefore, for overcoming the above problems, needing a kind of jack, can avoid driving screw mandrel to occur bite, making rotary actuation screw mandrel smooth and easy, increase work efficiency, reduce labor intensity.

Utility model content

In view of this, the purpose of this utility model overcomes defect of the prior art, provides a kind of jack, can avoid driving screw mandrel to occur bite, makes rotary actuation screw mandrel smooth and easy, increase work efficiency, reduce labor intensity.

Jack of the present utility model, comprise upper supporting piece, lower support element, be arranged between described upper supporting piece and lower support element for driving the hold-down arm group of upper supporting piece and driving screw mandrel, described hold-down arm group comprises hold-down arm and a pair lower support arm on a pair, the upper end of each described upper hold-down arm all by upper riveting pin and described upper supporting piece hinged, the lower end of each described lower support arm all by lower riveting pin and described lower support element hinged, connected by pivot shaft between the lower end of corresponding each described upper hold-down arm and the upper end of each described lower support arm, wherein a pivot shaft has been disposed radially tapped bore, another pivot shaft has been disposed radially through hole, the front end of described driving screw mandrel is passed through hole and is threaded with tapped bore, the back segment of described driving screw mandrel is installed with annular slab, the outside of described pivot shaft is fixed with bearing seat, described annular slab is installed in bearing seat by a bearing gland, and the outside of annular slab inside face and bearing seat and be provided with plane sliding bearing between annular slab outside face and bearing gland.

Further, described pivot shaft is provided with the cushion block for preventing described pivot shaft from wearing and tearing.

Further, described in two, described in upper hold-down arm and two, lower support arm is hollow structure, and its transversal surface is closed polygon or the polygon at least offering an opening.

Further, described in two, described in upper hold-down arm and two, the sidewall of lower support arm is provided with reinforced rib.

The beneficial effects of the utility model are: jack of the present utility model, driving the rear end of screw mandrel to be fixedly installed annular slab, and bearing seat is being set in the slide outside of annular slab, making to drive screw mandrel when rotation and translation, drive screw mandrel relatively stable and smooth rotation, avoid bite, ensure that artificial drive torque effectively can be converted into effective torque, valency jack can be risen easily, fast, and this apparatus structure is simple, cost of manufacture is low, easy to use, is beneficial to popularization.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the utility model is further described:

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the structural representation of bearing seat.

Detailed description of the invention

Fig. 1 is structural representation of the present utility model, Fig. 2 is the structural representation of bearing seat, as shown in the figure, jack of the present utility model in the present embodiment, comprise upper supporting piece 3, lower support element 4, be arranged between described upper supporting piece 3 and lower support element 4 for driving the hold-down arm group of upper supporting piece 3 and driving screw mandrel 1, described hold-down arm group comprises hold-down arm on a pair (only marking the upper hold-down arm 5 of side) and a pair lower support arm (only marking the lower support arm 6 of side), the upper end of each described upper hold-down arm 5 all by upper riveting pin and described upper supporting piece 3 hinged, the lower end of each described lower support arm all by lower riveting pin and described lower support element hinged, connected by pivot shaft (only marking the upper pivot shaft 2 of side) between the lower end of corresponding each described upper hold-down arm and the upper end of each described lower support arm, wherein a pivot shaft (mark) has been disposed radially tapped bore, another pivot shaft 2 has been disposed radially through hole, the front end of described driving screw mandrel 1 is passed through hole and is threaded with tapped bore, the back segment of described driving screw mandrel 1 is installed with annular slab 11, annular slab can drive screw mandrel one-body molded or welding all can realize goal of the invention of the present utility model, described annular slab 11 is embedded in a bearing seat 12, described annular slab 11 is installed in bearing seat 12 by a bearing gland 14, and the outside of annular slab 11 inside face and bearing seat 12 and be provided with plane sliding bearing 13 between annular slab 11 outside face and bearing gland 14, the front end driving screw mandrel 1 is the one end be threaded with hold-down arm group, and rear end is drive end, and inwardly represent the direction driving the two ends of screw mandrel 1 to point to centre vertically, the plane that one cutting is formed afterwards can be set outside described pivot shaft 2, increase the area of contact of bearing seat 12 and pivot shaft 2, for bearing seat 12 provides one perpendicular to the plane driving screw mandrel 1, by the bearing fit of bearing seat 12 and annular slab, make to there will not be bite during rotary actuation screw mandrel 1, avoid the rotation owing to driving screw mandrel 1 rotation and translation to cause not smooth, increase work efficiency, reduce labor intensity.

In the present embodiment, described pivot shaft 2 is provided with the cushion block 7 for preventing described pivot shaft 2 from wearing and tearing, described cushion block 7 is strip shape and is provided with for allowing the through hole driving screw mandrel 1 to pass in the middle of described cushion block 7, cushion block 7 is close to the plane that pivot shaft 2 is arranged, and cushion block 7 two ends are outwards bent to form locking section 7a and the mounting hole of locking and pivot shaft 2.

In the present embodiment, described in two, described in upper hold-down arm and two, lower support arm is hollow structure, and its transversal surface is closed polygon or the polygon at least offering an opening; Central hole structure can alleviate the overall weight of jack, convenient carrying.

In the present embodiment, described in upper hold-down arm 5 described in two and two, the sidewall of lower support arm 6 is provided with reinforced rib, described reinforced rib is the bar shaped reinforced rib of the length direction setting along a hold-down arm, described bar shaped reinforced rib is formed by the sidewall punch process of corresponding hold-down arm, make simple, strengthen the structural strength of hold-down arm.

What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.

Claims

1. a jack, it is characterized in that: comprise upper supporting piece, lower support element, be arranged between described upper supporting piece and lower support element for driving the hold-down arm group of upper supporting piece and driving screw mandrel, described hold-down arm group comprises hold-down arm and a pair lower support arm on a pair, the upper end of each described upper hold-down arm all by upper riveting pin and described upper supporting piece hinged, the lower end of each described lower support arm all by lower riveting pin and described lower support element hinged, connected by pivot shaft between the lower end of corresponding each described upper hold-down arm and the upper end of each described lower support arm, wherein a pivot shaft has been disposed radially tapped bore, another pivot shaft has been disposed radially through hole, the front end of described driving screw mandrel is passed through hole and is threaded with tapped bore, the back segment of described driving screw mandrel is installed with annular slab, described annular slab is embedded in a bearing seat, described annular slab is installed in bearing seat by a bearing gland, and the inner bottom surface of annular slab medial surface and bearing seat and be provided with plane sliding bearing between annular slab lateral surface and bearing gland.

2. jack according to claim 1, is characterized in that: described pivot shaft is provided with the cushion block for preventing described pivot shaft from wearing and tearing.

3. jack according to claim 2, is characterized in that: described in two, described in upper hold-down arm and two, lower support arm is hollow structure, and its transversal surface is closed polygon or the polygon at least offering an opening.

4. jack according to claim 3, is characterized in that: described in two, described in upper hold-down arm and two, the sidewall of lower support arm is provided with reinforced rib.