CN203663279U

CN203663279U - Miniature expanding device

Info

Publication number: CN203663279U
Application number: CN201320817607.XU
Authority: CN
Inventors: 李宏泉; 罗宗哲; 张桂萍
Original assignee: ZHONGAN FIRE-FIGHTING EQUIPMENT Co Ltd BAOJI
Current assignee: ZHONGAN FIRE-FIGHTING EQUIPMENT Co Ltd BAOJI
Priority date: 2013-12-11
Filing date: 2013-12-11
Publication date: 2014-06-25
Anticipated expiration: 2023-12-11

Abstract

The utility model provides a miniature expanding device. One end of a cylinder body is communicated with hydraulic oil through an oil hole A and an oil hole B, an inner cavity in the other end of the cylinder body is fixedly connected with a cylinder cover, the outer wall face of the cylinder body is fixedly connected with the middle of an expanding support, a piston is arranged in the cylinder body, one end of a rod connector penetrates through the cylinder cover and the expanding support to be fixedly connected with one end of the piston, the other end of the rod connector is hinged to the back ends of two expanding arms, the front ends of the expanding arms are fixedly connected with expanding heads, one end of a connecting rod is hinged to the end of the expanding support, the other end of the connecting rod is hinged to the expanding arms, the hinge points of the other end of the connecting rod and the expanding arms are closer to the front portions of the expanding arms than the hinge points of the rod connector and the expanding arms, a center oil pipe is arranged in the cylinder body, one end of the center oil pipe is communicated with the oil hole B, the other end of the center oil pipe extends into a cavity body of the piston and forms a cavity with the cavity body, and a radial hole is formed in the piston to be communicated with the cavity. By means of the miniature expanding device, the structure is optimized, the weight is substantially reduced, the machining cost is reduced, the device can be flexibly used, and the working efficiency of emergency rescuing is greatly improved.

Description

Miniature expander

Technical field

The utility model belongs to rescue and relief work equipment technical field, is specifically related to a kind of miniature expander.

Background technology

Along with Chinese national economy and urban construction fast development, various natural calamities, serious accident happen occasionally, and the people's lives and property is subject to serious threat.For this reason, both at home and abroad all having done a large amount of work aspect the research of rescue and relief work instrument, develop into modern pneumatic tool, hydraulic tool, ultrahigh-pressure hydraulic instrument from initial hand tools, kind, the function of product also become better and approaching perfection day by day.Hydraulic spreader is one of main tool of hydraulic pressure series rescue tool, support the use with power pump or manual pump, in the time of the disasters such as breaking out of fire, traffic accident, earthquake, use that expander can be realized expansion support, pull, tears, rescue work is carried out in the operation such as extruding, rescue is confined in the victim in constrained environment or rescues the pest that is subject in hazardous environment, the object that reaches rescue or the disaster relief is the break-in tool of fire brigade, traffic police team, industrial and mining enterprises and other disaster relief and rescue department indispensabilities.The weight of existing hydraulic spreader is all more than 20 kilograms, and weight is larger, and in disaster is speedily carried out rescue work process, rescue personnel runs out of space, and is unfavorable for very much continuous rescue work, is therefore necessary to improve.

Utility model content

The technical problem that the utility model solves: a kind of miniature expander is provided, adopt bar mechanism, by preposition the stress support of instrument, greatly dwindle the appearance and size of expansion arm, alleviate instrument weight, increased the effective torque of expansion arm simultaneously, under the condition of not falling in the expansionary force performance indications of expander, reduced cylinder bore dia and the appearance and size of cylinder body, the complete machine weight of instrument is declined to a great extent, and instrument uses more flexible.

The technical solution adopted in the utility model: miniature expander, there is cylinder body, described cylinder body one end is communicated with hydraulic oil by A oilhole and B oilhole, cylinder body other end inner chamber is fixedly connected with cylinder cap, outer wall of cylinder block face is fixedly connected with expandable stent middle part, in cylinder body, be provided with piston, knock-off joint one end is fixedly connected with piston one end with expandable stent through cylinder cap, the hinged two expansion arm rear ends of the described knock-off joint other end, described expansion arm front end is fixedly connected with expansion head, connecting rod one end and expandable stent end are hinged, the described connecting rod other end with expansion arm hinged and its pin joint than the pin joint of knock-off joint and expansion arm near expansion arm forward position, in described cylinder body, be provided with center oil pipe, oil pipe one end, described center is communicated with B oilhole, the center oil pipe other end stretches in the cavity of piston and with cavity and forms cavity, the radial hole being shaped with on described piston is communicated with cavity.

Further, the internal thread being shaped with on the internal thread that described cylinder ends inner chamber is shaped with and cylinder cap excircle screws, and the internal thread that the external screw thread being shaped with on cylinder ends excircle and expandable stent inner chamber are shaped with screws.

Further, described knock-off joint is by two hinged two expansion arm rear ends of straight pin C, described expansion arm front end is fixedly connected with expansion head by straight pin G, connecting rod one end is hinged by straight pin D and expandable stent end, the described connecting rod other end pass through straight pin H with expansion arm hinged and its pin joint than the pin joint of knock-off joint and expansion arm near expansion arm forward position.

Further, described expandable stent two ends are all shaped with U-shaped groove, and described connecting rod one end is placed in U-shaped groove also hinged by straight pin D.

The utility model is structure optimization compared with prior art, and weight significantly reduces, and processing cost reduces, and instrument uses more flexible, has improved greatly the operating efficiency of rescue.

Brief description of the drawings

Structural representation when Fig. 1 is the utility model closure;

Structural representation when Fig. 2 is the utility model expansion;

Fig. 3 is expandable stent structural front view of the present utility model;

Fig. 4 is expandable stent structure side view of the present utility model.

Detailed description of the invention

Below in conjunction with accompanying drawing 1-4, embodiment of the present utility model is described.

Miniature expander, there is cylinder body 9, described cylinder body 9 one end are communicated with hydraulic oil by A oilhole and B oilhole, cylinder body 9 other end inner chambers are fixedly connected with cylinder cap 6, cylinder body 9 outside wall surface are fixedly connected with expandable stent 4 middle parts, specifically, the internal thread being shaped with on the internal thread that described cylinder body 9 end inner chambers are shaped with and cylinder cap 6 excircles screws, and the internal thread that the external screw thread being shaped with on cylinder body 9 end excircles and expandable stent 4 inner chambers are shaped with screws.

In cylinder body 9, be provided with piston 7, knock-off joint 5 one end are fixedly connected with piston 7 one end with expandable stent 4 through cylinder cap 6, described knock-off joint 5 is by two hinged two expansion arm 2 rear ends of straight pin C, described expansion arm 2 front ends are fixedly connected with expansion 1 by straight pin G, connecting rod 3 one end are hinged by straight pin D and expandable stent 4 ends, described connecting rod 3 other ends by straight pin H with expansion arm 2 hinged and its pin joint than knock-off joint 5 with the pin joint of expansion arm 2 near expansion arm 2 forward positions, specifically, described expandable stent 4 two ends are all shaped with U-shaped groove 13, described connecting rod 3 one end are placed in U-shaped groove 13 also hinged by straight pin D.In described cylinder body 9, be provided with center oil pipe 8, oil pipe 8 one end, described center are communicated with B oilhole, and oil pipe 8 other ends in center stretch in the cavity 10 of piston 7 and form cavity 11 with cavity 10, and the radial hole 12 being shaped with on described piston 7 is communicated with cavity 11.

Operation principle: the plunger shaft that hydraulic oil enters cylinder body 9 through the A oilhole of cylinder body 9 rear end faces, promote piston 7 protruding, the expansion arm 2 that is fixed on piston 7 front ends is rotated taking bearing pin H as fulcrum, and two expansions 1 complete the planning function with the outside rotation of cylinder body axis symmetry.The hydraulic oil of piston rod chamber flows to through the radial hole 12 of piston rod root the cavity 11 that the cavity 10Yu center oil pipe 8 of piston 7 forms, and flows out from the B oilhole of cylinder body 9 bottom center finally by center oil pipe 8, completes the planning function one time.When hydraulic oil arrives the cavity 10 of piston 7 from the oil-feed of B oilhole, flow through again cavity 11, radial hole 12 arrives rod end chamber, promotes piston 7 and retracts and drive expansion arm 2, expansion 1 closure, realizes pull, holding function, the oil of plunger shaft flows out through the A hole of cylinder body bottom surface, completes one action circulation.

The utility model adopts 63MPa ultrahigh-pressure hydraulic technology, the technical state-of-the-art technology of gathering the subjects such as machinery, hydraulic pressure, material, heat treatment, described cylinder body 9, expandable stent 4, expansion arm 2 all adopt high-strength aluminum alloy forging, process special thermal treatment, and expansion arm 2 all can be carried in whole length range.

The utility model adopts the linkage of optimizing, the performance indications of instrument do not reduce, by the Weight control of instrument in 10 kilograms, greatly alleviated the weight of instrument, improved rescue efficiency.

Above-described embodiment, is preferred embodiment of the present utility model, is not used for limiting the utility model practical range, and the equivalence of being done with content described in the utility model claim therefore all changes, within all should being included in the utility model claim scope.

Claims

1. miniature expander, there is cylinder body (9), it is characterized in that: described cylinder body (9) one end is communicated with hydraulic oil by A oilhole and B oilhole, cylinder body (9) other end inner chamber is fixedly connected with cylinder cap (6), cylinder body (9) outside wall surface is fixedly connected with expandable stent (4) middle part, in cylinder body (9), be provided with piston (7), knock-off joint (5) one end is fixedly connected with piston (7) one end with expandable stent (4) through cylinder cap (6), hinged two expansion arm of described knock-off joint (5) other end (2) rear end, described expansion arm (2) front end is fixedly connected with expansion head (1), connecting rod (3) one end and expandable stent (4) end are hinged, hinged and its pin joint of described connecting rod (3) other end and expansion arm (2) than knock-off joint (5) with the pin joint of expansion arm (2) near expansion arm (2) forward position, in described cylinder body (9), be provided with center oil pipe (8), described center oil pipe (8) one end is communicated with B oilhole, center oil pipe (8) other end stretches in the cavity (10) of piston (7) and with cavity (10) and forms cavity (11), the radial hole (12) being shaped with on described piston (7) is communicated with cavity (11).

2. miniature expander according to claim 1, it is characterized in that: the internal thread being shaped with on the internal thread that described cylinder body (9) end inner chamber is shaped with and cylinder cap (6) excircle screws, the internal thread that the external screw thread being shaped with on the excircle of cylinder body (9) end and expandable stent (4) inner chamber are shaped with screws.

3. miniature expander according to claim 1 and 2, it is characterized in that: described knock-off joint (5) is by two hinged two expansion arm of straight pin C (2) rear end, described expansion arm (2) front end is fixedly connected with expansion head (1) by straight pin G, connecting rod (3) one end is hinged by straight pin D and expandable stent (4) end, described connecting rod (3) other end by straight pin H and expansion arm (2) is hinged and its pin joint than the pin joint of knock-off joint (5) and expansion arm (2) near expansion arm (2) forward position.

4. miniature expander according to claim 3, is characterized in that: described expandable stent (4) two ends are all shaped with U-shaped groove (13), and described connecting rod (3) one end is placed in U-shaped groove (13) also hinged by straight pin D.