CN209781341U

CN209781341U - buffer device for hydraulic cylinder

Info

Publication number: CN209781341U
Application number: CN201920362839.8U
Authority: CN
Inventors: 王景生; 王朕; 张铨
Original assignee: Fuxin Kaistrom Hydraulic Machinery Co Ltd
Current assignee: Fuxin Kaistrom Hydraulic Machinery Co Ltd
Priority date: 2019-03-21
Filing date: 2019-03-21
Publication date: 2019-12-13
Anticipated expiration: 2029-03-21

Abstract

The utility model relates to a pneumatic cylinder technical field just discloses a pneumatic cylinder is with device of slowing down centre, including the cylinder, the right side fixed mounting of cylinder has the end block that extends to the cylinder inside, the left side cartridge of cylinder has the movable rod that extends to the cylinder inside, solid fixed ring has been cup jointed to the outside of movable rod, the outside of movable rod has been cup jointed and has been located the left piston of solid fixed ring, the outside of movable rod has been cup jointed and has been located the left cover of slowing down centre of piston, the left side of end block is provided with the insertion groove that is located the cylinder inside, the orifice that is located the insertion groove top is seted up in the left side of end block. This buffer for pneumatic cylinder for the buffering effect is better, thereby avoids movable rod and end block to produce stronger collision, improves the buffering effect, makes inside still can not produce the damage after long-time the use, has reduced the pneumatic cylinder maintenance replacement cost, improves the life of pneumatic cylinder.

Description

Buffer device for hydraulic cylinder

Technical Field

The utility model relates to a pneumatic cylinder technical field specifically is a buffer for pneumatic cylinder.

Background

The hydraulic cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and does linear reciprocating motion, has simple structure and reliable work, can omit a speed reducer when realizing reciprocating motion, has no transmission clearance and moves stably, thereby being widely applied to hydraulic systems of various machines, and the output force of the hydraulic cylinder is in direct proportion to the effective area of a piston and the pressure difference between the two sides of the piston; the hydraulic cylinder basically comprises a cylinder barrel and a cylinder cover, a piston and a piston rod, a sealing device, a buffering device and an exhaust device, wherein the buffering device and the exhaust device are determined according to specific application occasions, and other devices are indispensable.

The pneumatic cylinder during operation, piston terminal speed is very fast, if direct and end cover collide with each other, under the effect of inertial force and hydraulic pressure, not only can damage the end cover, can produce great impact load moreover, produce adverse effect to the system, traditional buffer for the pneumatic cylinder is not good to the buffering effect of pneumatic cylinder when using, inside mechanical collision friction still can cause the damage to the pneumatic cylinder after long-time the use, make the inside pressure of pneumatic cylinder reduce can't use even, so proposed a buffer for the pneumatic cylinder and solved the problem that the aforesaid provided.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides a buffer for pneumatic cylinder possesses advantages such as buffering effect is better, has solved traditional buffer for pneumatic cylinder and is not good to the pneumatic cylinder buffering effect when using, and the friction of inside mechanical collision still can cause the damage to the pneumatic cylinder after long-time the use for pneumatic cylinder internal pressure reduces the problem that can't use even.

(II) technical scheme

For the better purpose of realizing above-mentioned buffering effect, the utility model provides a following technical scheme: a buffer device for a hydraulic cylinder comprises a cylinder barrel, wherein an end block extending to the inside of the cylinder barrel is fixedly installed on the right side of the cylinder barrel, a movable rod extending to the inside of the cylinder barrel is inserted into the left side of the cylinder barrel, a fixing ring is sleeved outside the movable rod, a piston located on the left side of the fixing ring is sleeved outside the movable rod, a buffer sleeve located on the left side of the piston is sleeved outside the movable rod, an insertion groove located inside the cylinder barrel is formed in the left side of the end block, a throttling hole located above the insertion groove is formed in the left side of the end block, an inlet hole penetrating through the end block and communicated with the right side of the insertion groove is formed in the bottom of the end block, an adjusting hole penetrating through the end block and communicated with the right side of the throttling hole and the top of the inlet hole is formed in the top of the end block, a current-limiting screw, the utility model discloses a restriction flow hole, including the insertion groove, the entrance hole, the restriction flow hole, the inner wall left end fixed mounting who is located the insertion groove below and communicates with the entrance hole left side, the inner wall left end fixed mounting of restriction flow hole has the stationary blade, the right side fixed mounting of stationary blade has the coupling spring who is located the inside restriction flow hole, coupling spring's right side fixed mounting has the ball that seals that is located the inside restriction flow hole.

Preferably, the right side of the end block is arc-shaped, and the front surface of the end block is provided with a mounting opening which is circular.

Preferably, the outside of movable rod is provided with the annular fixed slot that quantity is five, the outside of piston is provided with compresses tightly the groove, the outside of piston is provided with the deformation groove that quantity is four and be located and compress tightly the groove both sides.

Preferably, the outer part of the flow limiting plug is matched with the inner wall of the left end of the inlet hole, and the outer part of the flow limiting plug is provided with flow reducing grooves which are distributed in an annular equal angle mode.

Preferably, the flow limiting hole consists of a movable hole and a connecting hole on the left side of the movable hole, and the inner diameter of the connecting hole is smaller than that of the movable hole.

Preferably, the diameter of the sealing ball is larger than that of the connecting hole, and the left side of the fixing piece is provided with a through hole.

(III) advantageous effects

Compared with the prior art, the utility model provides a buffer for pneumatic cylinder possesses following beneficial effect:

When the movable rod and the piston in the hydraulic cylinder move rightwards, the internal liquid enters the inlet hole through the throttling hole and the adjusting hole, and simultaneously the liquid enters the inlet hole through the insertion groove, the liquid pushes the sealing ball to move leftwards, the connecting spring is stretched and deformed, the sealing ball completely seals the flow limiting hole, the cross-sectional area of the liquid flowing out is reduced, the internal pressure is improved, the pressure at the right end of the piston is increased to be opposite to the pressure at the left end of the piston, the movable rod and the piston continue to move rightwards, the flow limiting plug simultaneously enters the left end of the inlet hole when the right end of the movable rod is inserted into the insertion groove, the liquid can enter the inlet hole through the throttling hole, the cross-sectional area of the liquid flowing out is smaller, the pressure at the right end of the piston is further improved, and the pressure of the movable rod and the piston, make the buffering effect better to avoid movable rod and end block to produce stronger collision, improve the buffering effect, make long-time back inside still can not produce the damage, reduced pneumatic cylinder maintenance replacement cost, improve the life of pneumatic cylinder.

Drawings

FIG. 1 is a schematic structural view of the present invention;

Fig. 2 is an enlarged schematic view of the structure at a position a of the present invention.

In the figure: 1 cylinder barrel, 2 end block, 3 movable rod, 4 fixed ring, 5 piston, 6 buffer sleeve, 7 insertion groove, 8 throttling hole, 9 adjusting hole, 11 inlet hole, 12 flow limiting screw, 13 flow limiting plug, 14 flow limiting hole, 15 fixing piece, 16 connecting spring and 17 sealing ball.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

referring to fig. 1-2, a buffering device for a hydraulic cylinder comprises a cylinder barrel 1, wherein an end block 2 extending into the cylinder barrel 1 is fixedly installed on the right side of the cylinder barrel 1, the right side of the end block 2 is arc-shaped, an installation opening is formed in the front side of the end block 2, the installation opening is circular, a movable rod 3 extending into the cylinder barrel 1 is inserted into the left side of the cylinder barrel 1, a fixed ring 4 is sleeved outside the movable rod 3, a piston 5 positioned on the left side of the fixed ring 4 is sleeved outside the movable rod 3, five annular fixing grooves are formed outside the movable rod 3, a pressing groove is formed outside the piston 5, four deformation grooves positioned on two sides of the pressing groove are formed outside the piston 5, a buffer sleeve 6 positioned on the left side of the piston 5 is sleeved outside the movable rod 3, an insertion groove 7 positioned inside the cylinder barrel 1 is formed on the left side of the end block 2, a throttling hole 8 positioned above, the bottom of the end block 2 is provided with an inlet hole 11 which penetrates through the end block 2 and is communicated with the right side of the insertion groove 7, the top of the end block 2 is provided with an adjusting hole 9 which penetrates through the end block 2 and is communicated with the right side of the orifice 8 and the top of the inlet hole 11, the top of the end block 2 is inserted with a flow limiting screw 12 which is positioned inside the adjusting hole 9, the right side of the movable rod 3 is fixedly provided with a flow limiting plug 13 which is positioned inside the cylinder barrel 1, the outside of the flow limiting plug 13 is matched with the inner wall of the left end of the inlet hole 11, the outside of the flow limiting plug 13 is provided with a flow reducing groove which is annularly and equiangularly distributed, the left side of the end block 2 is provided with a flow limiting hole 14 which is positioned below the insertion groove 7 and is communicated with the left side of the inlet hole 11, the flow limiting hole 14 consists of a movable hole and a connecting hole on the left side, a sealing ball 17 positioned in the flow limiting hole 14 is fixedly arranged on the right side of the connecting spring 16, the diameter of the sealing ball 17 is larger than that of the connecting hole, a through hole is formed in the left side of the fixing plate 15, when the movable rod 3 and the piston 5 in the hydraulic cylinder move rightwards, the internal liquid enters the inlet hole 11 through the throttling hole 8 and the adjusting hole 9, meanwhile, the liquid enters the inlet hole 11 through the insertion groove 7, the liquid pushes the sealing ball 17 to move leftwards, the connecting spring 16 is deformed in an extending manner, the sealing ball 17 completely seals the flow limiting hole 14, the cross-sectional area of the liquid flowing out is reduced, the internal pressure is increased, the pressure of the right end of the piston 5 is increased and is opposite to the pressure of the left end of the piston 5, the movable rod 3 and the piston 5 continue to move rightwards, when the right end of the movable rod 3 is inserted into the insertion groove 7, the flow limiting plug 13 simultaneously enters, make the cross-sectional area that liquid can flow littleer, further improve 5 right-hand members pressures of piston, make movable rod 3 and piston 5 through the pressure removal of 5 left ends of piston more and more slow, make the buffering effect better, thereby avoid movable rod 3 and end block 2 to produce stronger collision, improve buffering effect, make inside still can not produce the damage after using for a long time, reduced pneumatic cylinder maintenance replacement cost, improve the life of pneumatic cylinder.

To sum up, in the buffering device for the hydraulic cylinder, when the movable rod 3 and the piston 5 inside the hydraulic cylinder move rightwards, the internal liquid enters the inlet hole 11 through the throttling hole 8 and the adjusting hole 9, and simultaneously the liquid enters the inlet hole 11 through the insertion groove 7, at the moment, the liquid pushes the sealing ball 17 to move leftwards, the connecting spring 16 extends and deforms, the sealing ball 17 completely seals the flow limiting hole 14, the cross-sectional area where the liquid flows out is reduced, the internal pressure is improved, the pressure of the right end of the piston 5 is increased and is opposite to the pressure of the left end of the piston 5, the movable rod 3 and the piston 5 continue moving rightwards, when the right end of the movable rod 3 is inserted into the insertion groove 7, the flow limiting plug 13 simultaneously enters the left end of the inlet hole 11, the liquid can enter the inlet hole 11 through the flow reducing groove outside the throttling hole 8, the adjusting hole 9 and the flow, make movable rod 3 and piston 5 through the pressure removal of 5 left ends of piston more and more slow, make the buffering effect better, thereby avoid movable rod 3 and end block 2 to produce stronger collision, improve the buffering effect, make inside still can not produce the damage after long-time the use, pneumatic cylinder maintenance replacement cost has been reduced, the life of pneumatic cylinder is improved, make the pneumatic cylinder can use to have solved traditional buffer for the pneumatic cylinder not good to the buffering effect of pneumatic cylinder when using, inside mechanical collision friction still can cause the damage to the pneumatic cylinder after long-time the use, make the problem that pneumatic cylinder internal pressure reduces unable use even.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a buffer for pneumatic cylinder, includes cylinder (1), its characterized in that: the right side fixed mounting of cylinder (1) has end block (2) that extends to inside of cylinder (1), the left side cartridge of cylinder (1) has activity pole (3) that extends to inside of cylinder (1), the outside of activity pole (3) has cup jointed solid fixed ring (4), the outside of activity pole (3) has cup jointed and is located solid fixed ring (4) left piston (5), the outside of activity pole (3) has cup jointed and is located piston (5) left cushion collar (6), the left side of end block (2) is provided with insertion groove (7) that are located inside of cylinder (1), orifice (8) that are located insertion groove (7) top are seted up in the left side of end block (2), the bottom of end block (2) is seted up and is run through end block (2) and with the access hole (11) of the right side intercommunication of insertion groove (7), the top of end block (2) is seted up and run through end block (2) and with the right side of orifice (8) and the top of access hole ( Adjusting hole (9) of intercommunication, the top cartridge of end block (2) has current-limiting screw (12) that are located adjusting hole (9) inside, the right side fixed mounting of movable rod (3) has current-limiting stopper (13) that are located cylinder (1) inside, the restricted aperture (14) that are located insertion groove (7) below and communicate with manhole (11) left side are seted up to the left side of end block (2), the inner wall left end fixed mounting of restricted aperture (14) has stationary blade (15), the right side fixed mounting of stationary blade (15) has connecting spring (16) that are located restricted aperture (14) inside, the right side fixed mounting of connecting spring (16) has the ball (17) that seals that is located restricted aperture (14) inside.

2. The shock absorbing device for a hydraulic cylinder according to claim 1, wherein: the right side of the end block (2) is arc-shaped, and the front surface of the end block (2) is provided with a mounting opening which is circular.

3. The shock absorbing device for a hydraulic cylinder according to claim 1, wherein: the outside of movable rod (3) is provided with the annular fixed slot that quantity is five, the outside of piston (5) is provided with compresses tightly the groove, the outside of piston (5) is provided with the deformation groove that quantity is four and is located and compresses tightly the groove both sides.

4. The shock absorbing device for a hydraulic cylinder according to claim 1, wherein: the outer part of the flow limiting plug (13) is matched with the inner wall of the left end of the inlet hole (11), and flow reducing grooves which are distributed in an annular equal angle mode are arranged on the outer part of the flow limiting plug (13).

5. The shock absorbing device for a hydraulic cylinder according to claim 1, wherein: the flow limiting hole (14) is composed of a movable hole and a connecting hole on the left side of the movable hole, and the inner diameter of the connecting hole is smaller than that of the movable hole.

6. The shock absorbing device for a hydraulic cylinder according to claim 5, wherein: the diameter of the sealing ball (17) is larger than that of the connecting hole, and the left side of the fixing piece (15) is provided with a through hole.