CN2335947Y - Quick jack hoist mechanism - Google Patents

Abstract

The utility model relates to a rapid jack hoisting mechanism, which is provided with a push arm 1. The lower end of the push arm is connected with the machine frame of the jack by a pivot 6 connected with a push rod 3. The push arm 1 is fixed with a supporting pin 7 which can support the back side of the push rod 3 whose upper end is connected with a connecting rod 4 by a pivot 2. The front end of the connecting rod 4 is pivoted with the lower part of the back end of the rocking arm of the jack. The mechanism can be matched with and arranged on the jack. A top plate can be lifted to the weight from the lowest position with empty load by one operation. The time and the labor are saved.

Description

Jack high raising speed mechanism

The utility model relates to a kind of special-purpose bont, the device that rises especially for wheeled oil jack rocking arm.

The hand-hydraulic jack its take over a business to promote be that pump pressure liquid oil is realized through reciprocal pressure-raising depression bar repeatedly.Take over a business as yet contact at jack and treat the top weight, with the weight bottom leave one apart from the time, make zero load the lifting down to be resisted against weight, this process also needs actuating depression bar repeatedly, pump pressure liquid oil realizes, this is just more time-consuming, require great effort.The rocking arm that wheeled oil jack support is taken over a business rises when unloaded, and is also like this.

Problem time-consuming when solving jack and take over a business unloaded the lifting, effort that the purpose of this utility model is, a kind of high raising speed mechanism that is disposed at wheeled oil jack is provided, this mechanism can take over a business from unloaded lifting of extreme lower position jack and arrive in treating the top weight through once promoting.

The technical scheme of the utility model jack high raising speed mechanism, its special character is to be provided with a push arm, push arm one end is connected in the jack frame through pivot, pivot is connected with push rod on this pivot, be fixed with on the push arm to push up and prop up in the support pin of push rod rear side, the push rod other end is connected with connecting rod through pivot, and connecting rod other end pivot is connected in jack rocking arm rear end lower.

This high raising speed mechanism is owing to be provided with push arm, push rod and the connecting rod that mutual pivot connects, connecting rod other end pivot is connected in jack rocking arm rear end lower, when jack is unloaded, only need once promote push arm, make push rod, link work, just can make the rocking arm high raising speed, until support in rocking arm take over a business to arrive at weight bottom, just can operate routinely thereupon and press depression bar jacking weight.So this mechanism promotes repeatedly the pump pressure oil cylinder and causes problem time-consuming, effort when having solved the jack zero load.When connecting rod travels forward and promotes rocking arm and rise, it is overhanging by dragline that jack is connected in the oil cylinder output piston (this output piston protract when being pumping cylinder promote rocking arm raise up) of rocking arm, liquid oil is inhaled into high-voltage oil cylinder (being equivalent to repeatedly the manually result of pump pressure), by unlikely counter the letting out of this liquid oil of check valve effect, thereby take over a business to be unlikely automatic lowering.Because ejector pin can break away from push rod on the push arm, this moment, push arm can freely fall after rise, did not hinder in jack and used.

Below in conjunction with description of drawings embodiment of the present utility model.

Fig. 1 is this jack high raising speed structural scheme of mechanism;

Fig. 2 is that this high raising speed mechanism is installed on wheeled oil jack scheme drawing.

Embodiment 1 jack high raising speed mechanism, be provided with push arm 1, the push arm lower end is connected in the jack frame through pivot 6, pivot is connected with push rod 3 on the pivot 6, be fixed with on the push arm 1 to push up and prop up in the support pin 7 of push rod 3 rear sides, push rod 3 upper ends are connected with connecting rod 4 through pivot 2, and connecting rod 4 front ends are connected in jack rocking arm 9 rear end lower through pivot 5 pivots, and this place and pivot are connected in jack high-voltage oil cylinder 10 output piston tops.

Even promote when usually jack is unloaded, also pump pressure oil cylinder repeatedly repeatedly, make high-voltage oil cylinder 10 interior output pistons overhanging, push rocking arm and rise.Use this mechanism, can once promote push arm 1, unloaded jack rocking arm 9 is raised up to its upper rminal disc be resisted against weight, then pump pressure oil cylinder lifting weight.As shown in Figure 2, the high raising speed process is to carry push arm 1 from the rear end, makes its A point to being positioned at A ＇ point, correspondingly support pin 7, pivot 2 and pivot 5 simultaneously from former A point to being positioned at A ＇ point, the result is that rocking arm 9 rotates according to pivot 8, being risen to by former A point is positioned at A ＇ point.The back push arm 1 that rises can freely fall after rise, because of support pin 7 can break away from push rod 3.

Claims (1)

1, jack high raising speed mechanism, it is characterized in that being provided with a push arm (1), push arm (1) one end is connected in the jack frame through pivot (6), be connected with push rod (3) on the pivot (6), be fixed with on the push arm (1) to push up and prop up in the support pin (7) of push rod (3) rear side, push rod (3) other end is connected with connecting rod (4) through pivot (2), and connecting rod (4) other end pivot is connected in jack rocking arm rear end lower.

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