CN201906371U

CN201906371U - Hydraulic expander with large initial force

Info

Publication number: CN201906371U
Application number: CN201020614920XU
Authority: CN
Inventors: 杨勇; 丁卫撑; 袁珏
Original assignee: Chengdu Univeristy of Technology
Current assignee: Chengdu Univeristy of Technology
Priority date: 2010-11-19
Filing date: 2010-11-19
Publication date: 2011-07-27
Anticipated expiration: 2020-11-19

Abstract

The utility model discloses a hydraulic expander with a large initial force, which comprises an expansion arm, a clamping plate, a sleeve and a hydraulic cylinder, wherein the expansion arm is hinged with the clamping plate though a pin bolt; an arm handle is arranged at the other end of the expansion arm opposite to an expansion head; and the end part of the arm handle is connected with a piston head of an oil cylinder through a connecting rod. In operation, the forced direction of the arm handle pulled by the connecting rod forms a large included angle with the movement direction of the piston of the oil cylinder at the initial stage; therefore, a very large component force will be produced to pull the arm handle, so that the expander can produce a large expansion force, and the operation performance of the hydraulic expander is greatly enhanced.

Description

Big starting force hydraulic spreader

Technical field

The utility model relates to a kind of fire-fighting hydraulic pressure break-in tool, is applicable to rescue and relief work when fire takes place, road traffic accident and other sudden disaster accidents.

Background technology

In earthquake relief work and other many rescue occasions, hydraulic spreader is a kind of very important rescue tool.But, the expansion action of existing hydraulic spreader is to realize expansion action by the piston of hydraulic cylinder by hinged direct drive expansion arm inboard, there is not force-increasing mechanism, make its original state strength religion little in expansion, greatly influenced the function of use of hydraulic spreader, all there is this situation in the disclosed hydraulic spreader of Chinese patent literature CN2227545Y, CN2759692Y.

Summary of the invention

The purpose of this utility model is: a kind of hydraulic spreader with big initial expansion power is provided.

The technical solution of the utility model is: a kind of hydraulic spreader of big starting force, and this expander comprises expansion arm, clamping plate, sleeve, hydraulic cylinder, expansion arm is hinged by pin and clamping plate.The other end that described expansion arm is expanded head relatively has an arm handle, and arm pommel portion is connected with the oil cylinder piston head by connecting rod; During work, hydraulic cylinder promotes piston by the input hydraulic oil, and piston drivening rod pulling arm pommel portion makes the rich pin of expansion arm to inner rotary, the beginning expansion action.

Adopt said structure and since connecting rod pulling arm handle be subjected to force direction to form big angle in the starting stage to concern, therefore can produce very big component pulling arm handle, make expander can produce very big expansionary force with the direction of motion of oil cylinder piston.

The beneficial effects of the utility model are: this hydraulic spreader can provide very big initial expansion power.

Description of drawings

The utility model will be further described below in conjunction with drawings and Examples:

Fig. 1 is the original state figure of first kind of embodiment of the utility model;

Fig. 2 is the expansion centre position state diagram of first kind of embodiment of the utility model;

Fig. 3 is the complete expansion state figure of first kind of embodiment of the utility model;

Fig. 4 is that the utility model is implemented illustration for second kind.

Fig. 5 is the utility model initial expansion force analysis figure.

Wherein: 1 expansion arm; 2 pins; 3 arm handles; 4 connecting rods; 5 pins; 6 pins; 7 clamping plate; 8 sleeves; 9 connect inner core; 10 piston heads; 11 hydraulic cylinders; 12 connectors.

The specific embodiment

Fig. 1 is a kind of specific embodiment of the present utility model.Among the figure, expansion arm 1 includes arm handle 3, expansion arm 1 is hinged by pin 2 and clamping plate 7, clamping plate 7 are fixed on the sleeve 8, sleeve 8 is fixed on the shell of hydraulic cylinder 11, arm handle 3 ends are hinged with an end of connecting rod 4 by pin 5, and with to be connected inner core 9 front ends hinged, connection inner core 9 rear ends are connected with piston head 10 other end of connecting rod 4 by pin 6; Hydraulic cylinder 11 promotes piston by the input hydraulic oil, the motion of piston drives and connects inner core 9, connect inner core 9 drivening rods 4, component pulling arm handle 3 ends that connecting rod 4 produces, make expansion arm 1 rich pin 2 to inner rotary, the beginning expansion action, as shown in Figure 2, piston is further pushed ahead, and expansion arm 1 is further expanded.As shown in Figure 3, piston is further pushed ahead and is reached complete expansion state.Retracting piston or, expansion arm resetted by oil cylinder by oil cylinder springs return piston.

Fig. 4 is an another kind of specific embodiment of the present utility model.Among the figure, expansion arm 1 includes arm handle 3, expansion arm 1 is hinged by pin 2 and clamping plate 7, clamping plate 7 are fixed on the sleeve 8, sleeve 8 is fixed on the shell of hydraulic cylinder 11, arm handle 3 ends are hinged with an end of connecting rod 4 by pin 5, and the other end of connecting rod 4 is hinged by pin 6 and connector 12, and connector 12 connects with piston head 10; Hydraulic cylinder 11 promotes piston by the input hydraulic oil, piston move through connector 12, drivening rod 4, component pulling arm handle 3 ends that connecting rod 4 is produced make expansion arm 1 rich pin 2 to inner rotary, the beginning expansion action.

Fig. 5 is the expansion force analysis figure of the utility model when initial.As shown in Figure 5, hydraulic cylinder piston head 10 thrust forward is F0, and the component that arm handles 3 ends are expanded in connecting rod 4 pulling is respectively F1 and F2, and the angle between F1 and the F2 is α, and under the constant situation of F0, according to the parallelogram of forces rule, α is big more, and F1 and F2 are big more.α is very big when expander begins to expand, and therefore, hydraulic spreader of the present utility model can obtain very big expansionary force in original state.

Claims

1. the hydraulic spreader of a big starting force, this expander comprises expansion arm (1), clamping plate (7), sleeve (8), hydraulic cylinder (11), clamping plate (7) are fixed on the sleeve (8), sleeve (8) is fixed on hydraulic cylinder (11) shell, expansion arm (1) is hinged by pin (2) and clamping plate (7), it is characterized in that: this expansion arm (1) other end of expansion head relatively has an arm handle (3), and arm handle (3) end is connected with piston head (10) by connecting rod (4).

2. big starting force hydraulic spreader according to claim 1, it is characterized in that: described arm handle (3) end is hinged with an end of connecting rod (4) by pin (5), with to be connected inner core (9) front end hinged, connection inner core (9) rear end is connected with piston head (10) other end of connecting rod (4) by pin (6).

3. big starting force hydraulic spreader according to claim 1, it is characterized in that: described arm handle (3) end is hinged with an end of connecting rod (4) by pin (5), the other end of connecting rod (4) is hinged by pin (6) and connector (12), and the same piston head of connector (12) (10) connects.