CN1083185A

CN1083185A - Closed hydraulic cylinder with damped stretching action

Info

Publication number: CN1083185A
Application number: CN 92110175
Authority: CN
Inventors: 林荣敏
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-08-28
Filing date: 1992-08-28
Publication date: 1994-03-02
Anticipated expiration: 2007-08-28
Also published as: CN1031153C

Abstract

A kind of closed hydraulic cylinder with damped stretching action, mainly form by a cylinder pressure body and a piston rod, establish a pressure chamber, a conditioning chamber and a buffer cell in the body, the opposite end of body and piston rod is established a draw ring respectively, borrowing ambient air to import the pressure chamber when they stretch relatively makes piston that the loop of pressure chamber's fluid through comprising current-limiting mechanism flow to conditioning chamber, be located at the side of conditioning chamber because of buffer cell, it can be adjusted buffer space automatically and reach the effect of buffering, the effect of stability hydraulic, thus prevent that body from bearing excessive hydraulic pressure.It is reasonable that this oil hydraulic cylinder also has simple structure, and actual effect is good, can be used for commonly using the occasion that oil hydraulic cylinder can't use.

Description

Closed hydraulic cylinder with damped stretching action

The present invention relates to a kind of closed hydraulic cylinder structure with damped stretching action, its integral type loop design, make this cylinder pressure can not only reach the self-regulating purpose of pressure doing the time spent, simultaneously, cooperate the design of current-limiting mechanism, more make this cylinder pressure have more suitable stretching pooling feature in use, thereby a convenient and practical oil hydraulic cylinder innovative design is provided.

No matter by tradition is oil hydraulic cylinder or vapour pressure cylinder, its usually system by a cylinder pressure body and be located at that the movable piston of pumping is constituted in the body, this is external then distinguishes external input and output tube (easy cylinder pressure is two-in-one design), importing, discharge high-voltage oil liquid or pressurized gas via this input and output tube, and make this piston can in the cylinder pressure body, produce reciprocal motion, and then provide the propelling movement object reciprocal stroke; Yet, the known cylinder pressure that produces reciprocating stroke with electric controling mode of this kind, because outside the assemblying body of cylinder pressure body and piston, need cooperation assembling external high pressure matchmaker input, output pipe in addition, simultaneously, need utilize in addition a control mechanism (as compressor etc.) to control this high pressure matchmaker's input and discharge, in the configuration of equipment integral, seem comparatively numerous and diverse and accurate, for general no electric supply or do not have for the field of employment of suitable spatial configuration, this known electric cylinder pressure with numerous and diverse equipment can not accord with practical application; Right and, this known cylinder pressure is only applicable to impose electrical control to producing reciprocating object (as unlatching of door leaf etc.) usually, and for the flexible buffering of the indeterminedness application of force (as traction of ship tow etc.), then this known electrical control formula cylinder pressure promptly can't reach the function that is suitable for mutually, therefore, for the invention field relevant with the present invention, this known cylinder pressure also can't provide one to meet practical design.

Moreover, a kind of plain type buffer (cushion) is arranged at present in addition, it mainly ties up to and is provided with a telescopic piston rod in the sleeve, and the upper cover of piston rod of sleeve is put a spring, when the two ends of sleeve and piston rod are stressed respectively, the tensile force that it produced can be counteracting that spring cushions, and then reaches the effect of slowing down the stretching momentum; Yet, the buffer that this is known, owing to it mainly is to borrow the absorption tensile force of spring to reach the effect that makes pulling force buffer, still, spring itself is because its elasticity coefficient is a certain value, and the change of its decrement is also proportional with the application of force, therefore, the telescopic variation of this piston rod is counted on the size of tensile force fully and is done the change of equivalent, though weighing-appliance has the pooling feature of some certain effects, but during as the buffering of the indeterminedness application of force, it is still difficult to have stable, certain actual effect.

Thereby, main purpose of the present invention is promptly utilizing one to have the Press cylinder device that loop designs, in the cylinder pressure body, be provided with a pressure chamber, a conditioning chamber and a buffer cell respectively, when relative stretching takes place with body in piston rod, utilize being imported into the pressure chamber of ambient air and make piston that pressure chamber's inner fluid is followed this loop through a current-limiting mechanism being guided to body in addition in the conditioning chamber of side, and then make this tensile force obtain certain buffering; As for, buffer cell then is located at the side of conditioning chamber, the capacity of the indoor fluid of its fit adjustment and can adjust its buffer space automatically, and then slow down conditioning chamber inner fluid pressure, prevent that body from bearing the hydraulic pressure of hard iron, simultaneously, is provided with a pressure spring at upper cover of piston rod, make after pulling force is removed, borrow the elastic force of this spring and can make piston rod automatically reset; In addition, design of the present invention, its not only more traditional cylinder pressure has more the effect of essence, simultaneously because simple structure, therefore more be imbued with economic value, moreover, do one relatively with known buffer, then owing to have suitable current-limiting mechanism design, and the stability of utilizing hydraulic pressure, when therefore making the present invention use, have more it and stablize and certain actual effect, improve the existing defective of known buffer as the stretching buffering.

Secondly, a further object of the present invention then is to be provided with an elasticity activity water conservancy diversion in the aforesaid current-limiting mechanism to chew, when it produces relative stretching in the cylinder pressure body with piston rod, the fluid of compression is chewed via this water conservancy diversion and can be obtained suitable current limitation effect, otherwise, when piston rod resetted, then this water conservancy diversion was chewed elasticity disengaging oil resistance mouth and is made fluid reply fast in the pressure chamber, reaches the effect that resets fast.

Now lift one of the present invention than specific embodiment, and cooperate illustrate as follows, believe projects of the present invention, technology, characteristics, effect etc., can by acquisition understand more clearly.

Fig. 1 is that structure of the present invention is analysed and observe and cylinder pressure first action diagram that stretches.

Fig. 2 is that structure of the present invention is analysed and observe and cylinder pressure second action diagram that stretches.

Fig. 3 is that structure of the present invention is analysed and observe and cylinder pressure the 3rd action diagram that stretches

Fig. 4 is that structure of the present invention is analysed and observe and cylinder pressure first action diagram that resets.

Fig. 5 is that structure of the present invention is analysed and observe and cylinder pressure second action diagram that resets.

Fig. 6 is the structure sectional view of current-limiting mechanism of the present invention.

Fig. 7 is the plan view of Fig. 6.

Fig. 8 is embodiments of the invention figure.

Among the figure:

(1) body (11) pressure chamber

(111) retaining edge (12) conditioning chamber

(112) draw ring

(13) buffer cell (131) pressure spring

(132) compression material mat (133) retaining edge

(134) perforation (14) fluid

(15) air

(16) separate (2) piston rod

(21) pressure spring (22) piston

(23) air imports chamber (231) pore

(232) air flue (24) draw ring

(3) current-limiting mechanism (31) perforation

(32) support (33) pressure spring

(34) current limliting piece (35) runner

(4) loop (5) tow

At first, please referring to shown in Figure 1, closed hydraulic cylinder structure with damped stretching action provided by the present invention, it is made up of a cylinder pressure body (1) and a piston rod (2), cylinder pressure body (1) can be provided with a draw ring (112) (24) respectively with the opposite end of piston rod (2), to provide as linking the stretching object in two ends; Wherein, be respectively equipped with a pressure chamber (11), a conditioning chamber (12) and a buffer cell (13) in the body (1), piston rod (2) is in a side of cylinder pressure body (1) stretches through pressure chamber (11), and the piston rod (2) that is inserted in the pressure chamber (11) is arranged with a pressure spring (21), and the piston (22) that makes piston rod (2) can be in pressure chamber (11) the elasticity reciprocating stroke of spacing, and in pressure chamber (11), be provided with retaining edge (111), so as to the stretching travel of limited piston (22); Be marked with suitable fluid (14) in the pressure chamber (11), and the side of (11) is provided with an air and imports chamber (23) in the pressure chamber, this air imports chamber (23) and is provided with the pore (231) that is interlinked to the outside with body (1), air imports that then other links to each other with air flue (232) between chamber (23) and pressure chamber (11), make the air that imports by pore (231) reach pressure chamber (11) via air flue (232), and when importing air (15) in the pressure chamber when (11), the interior air in pressure chamber (11) (15) is separated with aforesaid piston (22) with fluid (14), and when piston (22) shift reciprocately, can avoid air (15) and fluid (14) that mixing phenomena takes place; The side in addition of (11) then is provided with some current-limiting mechanisms (3) in the pressure chamber, its fluid (14) that can make piston (22) compression is through out-of-date generation metering function, then can increase back-flow velocity when fluid (14) refluxes, relevant its detailed structure narration below will be further elaborated; Secondly, fluid (14) after piston (22) the compression current-limiting mechanism (3) of flowing through, can be again through with the loop (4) of body (1) one UNICOM in a conditioning chamber (12), this conditioning chamber (12) is located at the interior appropriate location of body (1) and is separated by with pressure chamber (11) and air importing chamber (23) respectively, moreover, by conditioning chamber (12), loop (4) and the space that communicates that forms, pressure chamber (11), fluid (14) in it is injecting oil liquid (14), yet, after making piston (22) compression, fluid (14) can be imported into conditioning chamber (12) swimmingly, therefore, side at conditioning chamber (12) is provided with a buffer cell (13) in addition, be provided with a pressure spring (131) and a compression material mat (132) in this buffer cell (13), compression material mat (132) effect is omited together with piston (22), except that can in body (1), doing (its shift length system is limited by the retaining edge (133) of being located at both sides in the buffer cell (13)) the reciprocal displacement, can keep the close property of liquid of compression material mat (132) both sides simultaneously; Buffer cell is mainly an air chamber in (13), import air in buffer cell (13) by offering perforation (134) outside the body (1), thereby be compressed when entering conditioning chamber (12) when fluid (14), the fluid of pressurized (14) is this compression material mat of ejection (132) and make it produce compression displacement simultaneously, by preventing that with the buffering oil pressure body from bearing huge pressure, right in this cylinder pressure pulling force releasing piston (22) when resetting, then the pressure spring (131) in this buffer cell (13) produces back stretch simultaneously, compression material mat (132) returned back to top and force conditioning chamber (12) inner fluid (14) to reflux the homing action of accelerating piston bar (2) simultaneously.

Secondly, about its concrete design of current-limiting mechanism (3), please cooperate simultaneously referring to Fig. 1 and Fig. 6, shown in Figure 7, fluid (14) compression position that mainly is in the pressure chamber (11) is provided with a separation (16), this separation (16) is except that wearing for piston rod (2), around it, be provided with some perforation (31) in addition, each perforation (31) position is equipped with a current-limiting mechanism (3), and current-limiting mechanism (3) mainly be by one be fixed in perforation (31) vertical position, both sides fall L shaped sheet support (32), between this support (32), be provided with a pressure spring (33) top system one current limliting piece (34) and plug in aforesaid perforation (31), and these current limliting piece (34) central authorities are provided with the less runner of an internal diameter (35), make when fluid (14) passes through, thereby can produce metering function; The narration of relevant its action please continue the enforcement action referring to following relevant cylinder pressure.

By shown in Fig. 1 to Fig. 5, be respectively enforcement action diagram of the present invention, wherein, Fig. 1 to Fig. 3 is respectively the action that cylinder pressure is subjected to pulling force, and Fig. 4 and Fig. 5 then are respectively the answer action after pulling force is removed; By Fig. 1 to Fig. 3 as can be known, when body (1) produces relative pulling force with piston rod (2), the piston (22) of pressure chamber (11) inner piston rod (2) drives pressure spring (21) and produces compressed action, fluid (14) in the pressure chamber (11) is extruded and the current-limiting mechanism of flowing through (3), at this moment, because air imports displacement generation pressure chamber (11) the internal pressure change of chamber (23) because of piston (22), thereby import air so as to keeping the balance of pressure chamber (11) internal pressure in good time, make the piston (22) can smooth and easy displacement; After being compressed when fluid (14), the current limliting piece (34) of fluid (14) ejection current-limiting mechanism (3), make current limliting piece (34) plug terminate in perforation (31) position, and make fluid (14) only can be via runner (35) loop that arrives (4), thereby slow down the stretching momentum of body (1) and piston rod (2), as for fluid (14) in loop (4) reinjects conditioning chamber (12), thereby make the compression material mat (132) in the other buffer cell of conditioning chamber (12) (13) produce the displacement of side direction synchronously, and then slow down fluid (14) pressure in the conditioning chamber (12); Otherwise, as Fig. 4 and shown in Figure 5, when the pulling force of cylinder pressure is removed, because piston (22) produces the start that resets because of the back stretch of pressure spring (21), and original annotation also can be simultaneously be pushed because of resetting of compression material mat (132) in the fluid (14) of conditioning chamber (12) and refluxed in pressure chamber (11) via loop (4) and current-limiting mechanism (3) fluid (14) is multiple, moreover, this backflow fluid (14) is through current-limiting mechanism the time when (3), owing to the pressure that refluxes current limliting piece (34) ejection is broken away from perforation (31), thereby make fluid (14) fast pass back into pressure chamber (11) through the perforation (31) of larger aperture, make resetting of piston rod (2) fast and stablize.

And for example shown in Figure 8, be embodiments of the invention figure, by in graphic as can be known, it can be used in connection such as tow (5) enclosed type cylinder pressure provided by the present invention, so, and when hull is subjected to involve than high sea (as typhoon or billow), hull waves the huge tensile force that is produced, can effectively slow down the pulling force that tow (5) is born via suitable buffering of the present invention, lower the possibility that tow (5) is broken, keep the safety of hull; In addition, any similar all applicable the present invention of use occasion and reach and promote actual effect.

According to the above, closed hydraulic cylinder structure with damped stretching action provided by the present invention, its be different from the past traditional cylinder pressure or the design of buffer, and simplify and practicality between obtain a balance, and have known technology the enhancement and the economic benefit of the essence effect that can't reach.

Claims

1, a kind of closed hydraulic cylinder with damped stretching action, it is made up of a cylinder pressure body and a piston rod, and the opposite end of cylinder pressure body and piston rod can be respectively equipped with a draw ring, to provide as linking the stretching object in two ends; Wherein, be provided with a pressure chamber, a conditioning chamber and a buffer cell in the body, piston rod is in cylinder pressure body one side stretches through the pressure chamber, and the upper cover of piston rod in being inserted into the pressure chamber is provided with a pressure spring, and the piston that makes piston rod can be made the elasticity reciprocating stroke of spacing in the pressure chamber, and is provided with the stretching travel of retaining edge with limited piston in the pressure chamber; Secondly, be marked with suitable fluid in the pressure chamber, and the side in the pressure chamber is provided with an air and imports the chamber, this air imports the chamber and is provided with the pore that is interlinked to the outside with body, air imports between chamber and the pressure chamber and then links to each other with air flue in addition, as for, pressure indoor air and fluid system with the in addition close separation of liquid of aforementioned piston; Side in addition in the pressure chamber then is provided with some current-limiting mechanisms, and the fluid that can make Piston Compression then can increase back-flow velocity through out-of-date generation metering function when fluid refluxes; Moreover, fluid after the Piston Compression current-limiting mechanism of flowing through, can be again through with the loop of body one UNICOM in a conditioning chamber, this conditioning chamber is located at appropriate location in the body and is separated by with pressure chamber and air importing chamber respectively, yet, formed the space that communicates by conditioning chamber, loop and pressure chamber, fluid in it is injecting oil liquid, and be provided with a buffer cell in addition in the side of conditioning chamber, be provided with a pressure spring and a compression material mat in this buffer cell, but the compression material mat shift reciprocately can keep simultaneously that the conditioning chamber inner fluid is unlikely to leak; Be mainly an air chamber in the buffer cell, offer perforation outward by body and import air, thereby can make compression material mat produce flexible compression displacement, by preventing that with the buffering oil pressure body from bearing huge pressure in buffer cell.

2, as 1 described closed hydraulic cylinder with damped stretching action, it is characterized in that described current-limiting mechanism, it mainly is that fluid compression position in the pressure chamber is provided with a separation, this branch excludes to outside piston rod stretches through, around it, be provided with some perforation in addition, each punch position is equipped with a current-limiting mechanism, and current-limiting mechanism mainly is to be installed with down L shaped sheet support in perforation vertical position, both sides, between this support, be provided with pressure spring top system one current limliting piece and plug in aforesaid perforation, yet these current limliting piece central authorities are provided with the less runner of an internal diameter in addition, pass through so that the fluid current limliting to be provided.