CN202560686U

CN202560686U - Long-stroke buffering cylinder

Info

Publication number: CN202560686U
Application number: CN2012202468648U
Authority: CN
Inventors: 陈新; 屠文炳; 张鹰
Original assignee: CHANGZHOU HYH HYDRAULIC EQUIPMENT CO LTD
Current assignee: CHANGZHOU HYH HYDRAULIC EQUIPMENT CO LTD
Priority date: 2012-05-29
Filing date: 2012-05-29
Publication date: 2012-11-28
Anticipated expiration: 2022-05-29

Abstract

The utility model relates to the technical field of hydraulic cylinder, in particular to a long-stroke buffering -cylinder. The long-stroke buffering cylinder comprises a cylinder body, a bottom cap, an end cap, a piston rod and a piston. A direction of the piston rod extending out of the cylinder body is regarded as the front, a converse direction is regarded as the rear, the end cap and the bottom cap are respectively fixed at a front end and a rear end of the cylinder body, the piston is fixed at the rear end of the piston rod, a seal assembly is mounted on an outer ring of the piston, the outer ring of the piston is connected with an inner ring of the cylinder body in a sealing manner, an inner cavity of the cylinder body is divided into a rod cavity and a rodless cavity by the piston, a buffering post coaxial with the piston rod is arranged on the inner side of the bottom cap, a buffering cavity matching with an outer ring of the buffering post is arranged at the rear end of the piston rod, an oil passage is arranged at the center of the buffering post, and the oil passage is communicated with an oil feed hole. The long-stroke buffering cylinder has the advantages that since the buffering post is arranged at the bottom of the oil cylinder and the buffering cavity is arranged in the piston rod, increase of buffering stroke is guaranteed without increasing mounting distance of the oil cylinder, mounting and use of the oil cylinder are not affected at all, and cost is saved.

Description

Long stroke cushion cylinder

Technical field

The utility model relates to technical field of hydraulic oil cylinder, relates in particular to a kind of long stroke cushion cylinder, is used for the braking or the mild equipment that stops of needs of high-speed overload equipment.

Background technique

The buffer structure design of existing cushion cylinder (as shown in Figure 1) generally is buffer plunger of processing on piston rod; When piston-retraction arrives the oil cylinder bottom, buffer plunger indentation cushion hole, the gap of cushion hole and buffer plunger is very little; Make the oil return of oil hydraulic cylinder produce throttling action; Produce back pressure, thereby play buffer function, the gap length decision by buffer plunger and cushion hole of its cushioning effect.The cushion stroke of existing cushion cylinder is not long; Also can suitably extend bumper post and buffer cavity mainly be meant the length of bumper post and buffer cavity, though can make the oil cylinder mounting distance increase like this; Can influence the as installed of oil cylinder, obviously increase cost of production simultaneously.

The model utility content

The technical problem that the utility model will solve is: in order to improve the cushion stroke of cushion cylinder, and do not increase the mounting distance of oil cylinder, the utility model provides a kind of long stroke cushion cylinder.

The utility model solves the technological scheme that its technical problem adopted: a kind of long stroke cushion cylinder; Comprise cylinder body, bottom, end cap, piston rod and piston, the direction that the setting piston rod stretches out cylinder body is the place ahead, otherwise is the rear; End cap and bottom are individually fixed in the front-end and back-end of cylinder body; Piston is fixed in the rear end of piston rod, and the inner ring that the outer ring of piston is equipped with black box and cylinder body is tightly connected, and described piston is divided into rod chamber and rodless cavity with the inner chamber of cylinder body; Described bottom inboard is provided with the bumper post coaxial with piston rod; The rear end of described piston rod offers the buffer cavity that matches with the bumper post outer ring, and the center of described bumper post offers oil duct, and oil duct is connected with oil inlet hole.

For the ease of regulating buffer speed; Long stroke cushion cylinder also comprises the throttle valve that is installed on the bottom; Offer first oilhole that communicates with oil duct and second oilhole that communicates with rodless cavity on the described bottom; Described first oilhole and second oilhole are connected, and the end of described throttle valve is between first oilhole and second oilhole.

Quick startup when stretching out for the ease of oil cylinder, described bottom inboard also is provided with the one-way valve that is used for conducting oil inlet hole and rodless cavity, and one-way valve is closed at the cylinder buffer state.

Particularly, the inner ring of described buffer cavity and bumper post outer ring Spielpassung.

The beneficial effect of the utility model is that the long stroke cushion cylinder of the utility model is in the oil cylinder bottom with the bumper post design; Buffer cavity design in piston rod, the increase cushion stroke of assurance so not only, and can not increase the mounting distance of oil cylinder; Can not influence the installation and the use of oil cylinder fully; Practice thrift cost, avoid the intense impact of equipment and oil cylinder, the safe handling of protection equipment and oil cylinder.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further specified.

Fig. 1 is the structural representation of existing cushion cylinder.

Fig. 2 is the optimum embodiment's of the long stroke cushion cylinder of the utility model a structural representation.

Among the figure: 1, cylinder body, 1-1, rod chamber, 1-2, rodless cavity, 2, bottom, 2-1, first oilhole; 2-2, second oilhole, 3, end cap, 4, piston rod, 5, piston, 6, black box; 7, bumper post, 8, buffer cavity, 9, oil inlet hole, 10, throttle valve, 11, one-way valve.

Embodiment

Combine accompanying drawing that the utility model is done further detailed explanation now.These accompanying drawings are the schematic representation of simplification, the basic structure of the utility model only is described in a schematic way, so it only show the formation relevant with the utility model.

As shown in Figure 2, be the optimum embodiment of the long stroke cushion cylinder of the utility model, comprise cylinder body 1, bottom 2, end cap 3, piston rod 4 and piston 5; The direction that setting piston rod 4 stretches out cylinder body 1 is the place ahead, otherwise is the rear, and end cap 3 and bottom 2 are individually fixed in the front-end and back-end of cylinder body 1; Piston 5 is fixed in the rear end of piston rod 4; The inner ring that the outer ring of piston 5 is equipped with black box 6 and cylinder body 1 is tightly connected, and piston 5 is divided into rod chamber 1-1 and rodless cavity 1-2 with the inner chamber of cylinder body 1, and bottom 2 inboards are provided with the bumper post 7 coaxial with piston rod 4; The rear end of piston rod 4 offers the buffer cavity 8 that matches with bumper post 7 outer rings; The center of bumper post 7 offers oil duct 7-1, and oil duct 7-1 is connected with oil inlet hole 9, also comprises the throttle valve 10 that is installed on the bottom 2; Offer first oilhole 2-1 that communicates with oil duct 7-1 and second the oilhole 2-2 that communicates with rodless cavity 1-2 on the bottom 2; First oilhole 2-1 and second oilhole 2-2 are connected, and the end of throttle valve 10 is between first oilhole 2-1 and second oilhole 2-2, through regulating the position of throttle valve 10 ends between first oilhole 2-1 and second oilhole 2-2; Change the conducting area between first oilhole 2-1 and second the oilhole 2-2, thereby play the effect of regulating buffer speed.

Bottom 2 inboards also are provided with and are used for the one-way valve 11 of conducting oil inlet hole 9 to rodless cavity 1-2 oil-feed, and one-way valve 11 is the quick startups when being used for oil cylinder and stretching out, and closes at buffer status.

When piston 5 runs to when intersecting with bumper post 7; The gap that the fluid of oil cylinder rodless cavity 1-2 must pass through between bumper post 7 and the buffer cavity 8 could get into way to cycle oil; Be oil duct 7-1, the oil cylinder entering buffer status that reduces speed now gets into return tube fully up to this chamber inner fluid.

The new long stroke cushion cylinder of this practicality can extensively apply to the brake cylinder of high-speed overload equipment and need the mild equipment that stops, and avoids the intense impact of equipment and oil cylinder, the safe handling of protection equipment and oil cylinder.

With above-mentioned desirable embodiment according to the utility model is enlightenment, and through above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this model utility technological thought.The technical scope of this model utility is not limited to the content on the specification, must confirm its technical scope according to the claim scope.

Claims

1. one kind long stroke cushion cylinder; Comprise cylinder body (1), bottom (2), end cap (3), piston rod (4) and piston (5); The direction that setting piston rod (4) stretches out cylinder body (1) is the place ahead; Otherwise be the rear, end cap (3) and bottom (2) are individually fixed in the front-end and back-end of cylinder body (1), and piston (5) is fixed in the rear end of piston rod (4); The inner ring that the outer ring of piston (5) is equipped with black box (6) and cylinder body (1) is tightly connected; Described piston (5) is divided into rod chamber (1-1) and rodless cavity (1-2) with the inner chamber of cylinder body (1), it is characterized in that: described bottom (2) inboard is provided with the bumper post (7) coaxial with piston rod (4), and the rear end of described piston rod (4) offers the buffer cavity (8) that matches with bumper post (7) outer ring; The center of described bumper post (7) offers oil duct (7-1), and oil duct (7-1) is connected with oil inlet hole (9).

2. long stroke cushion cylinder as claimed in claim 1; It is characterized in that: also comprise the throttle valve (10) that is installed on the bottom (2); Offer first oilhole (2-1) that communicates with oil duct (7-1) and second oilhole (2-2) that communicates with rodless cavity (1-2) on the described bottom (2); Described first oilhole (2-1) and second oilhole (2-2) are connected, and the end of described throttle valve (10) is positioned between first oilhole (2-1) and second oilhole (2-2).

3. according to claim 1 or claim 2 long stroke cushion cylinder, it is characterized in that: described bottom (2) inboard also is provided with the one-way valve (11) that is used for conducting oil inlet hole (9) and rodless cavity (1-2).

4. long stroke cushion cylinder as claimed in claim 1 is characterized in that: the inner ring of described buffer cavity (8) and bumper post (7) outer ring Spielpassung.