CN101782090A - Double self locking hydraulic cylinder - Google Patents

Double self locking hydraulic cylinder Download PDF

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Publication number
CN101782090A
CN101782090A CN 201010121462 CN201010121462A CN101782090A CN 101782090 A CN101782090 A CN 101782090A CN 201010121462 CN201010121462 CN 201010121462 CN 201010121462 A CN201010121462 A CN 201010121462A CN 101782090 A CN101782090 A CN 101782090A
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CN
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cylinder
locking
chamber
rod
hydraulic
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CN 201010121462
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Chinese (zh)
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宋国裕
殷嘉寿
潘志荣
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无锡市长江液压缸厂
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Abstract

The invention relates to improvement on a hydraulic cylinder, in particular to a double self locking hydraulic cylinder having the combined functions of mechanical self locking and hydraulic self locking. The double self locking hydraulic cylinder has the advantages that: based on the traditional hydraulic cylinder, a mechanical and hydraulic double self locking design is adopted, a locking mode of primary hydraulic locking and secondary mechanical locking is realized, the hydraulic locking force is large, the locking force is adjustable and the locking technology is reliable; a piston rod extends out completely, and after the hydraulic cylinder is locked, the power supply and other power sources can be turned off to save energy as the hydraulic cylinder can maintain a locked state for a long time without any power; and the mechanical and hydraulic double self locking performance is stable, the sealing and locking are reliable, the pressure loss is simple, the pressure resistance is high, the structure is compact, and the locking operation is smooth without impact and vibration.

Description

双重自锁液压缸 Double self-locking hydraulic cylinder

技术领域 FIELD

[0001] 本发明属于液压设备技术领域,涉及一种液压缸的改良,具体是一种同时具备机 [0001] The present invention belongs to the technical field of hydraulic equipment, relates to an improvement of a hydraulic cylinder, comprising in particular a machine simultaneously

械自锁和液压自锁功能的双重自锁液压缸。 Double self-locking mechanical self-locking and self-locking function of the hydraulic cylinder. 背景技术 Background technique

[0002] 液压缸是一种应用范围非常广泛的设备,一般以油液作为工作介质,通过密封容积的变化来传递运动,通过油液内部的压力来传递动力,能够将液压能转变为机械能,做直线往复运动或摆动运动。 [0002] The hydraulic cylinder is a wide range of applications of the device, generally oil as the working medium, to transmit the movement by a change in volume of the seal, to transmit power through the pressure inside the fluid can be hydraulic energy into mechanical energy, a straight line reciprocating motion or swing motion. 液压缸通常由活塞杆、缸体、活塞和密封系统等几部分组成。 Cylinder typically consists of several parts of the piston rod, a cylinder, a piston and sealing system. 随着液压缸的发展,越来越多地被应用于在某些机械设备如航天航海的雷达定位装置、架桥机的垂直顶升装置、导轨锁紧装置、轧机锁紧装置上,在这些应用场合中,液压缸的活塞杆通常需要在一定时间内保持在同一位置状态而不能有移动。 With the development of hydraulic cylinders, are increasingly being applied in the vertical lifting some mechanical devices such as radar space navigation positioning apparatus, the apparatus erecting machine, the rail locking device, the locking device mill, in which applications, the cylinder rod typically needs to be kept at the same position within a certain period of time has not moved state. 这样的要求以往是通过在液压缸的回油管路上串接一个液控单向阀来实现,但是这种锁定方式存在如下的缺点:由于液压缸不可能做到完全的密封无泄漏,特别是在承受一定压力的情况下,液压油难免出现泄漏,这时候活塞杆就会产生一定的位移,从而影响到设备的工作效率和安全性。 This requirement is conventionally achieved by concatenating a check valve in the return pipe of the hydraulic cylinder, but there is a drawback to this locking manner: since the cylinder can not be completely leak-free seal, particularly in the case under some pressure, hydraulic oil will inevitably lead to leaks, this time the piston rod will have a certain amount of displacement, thus affecting the efficiency and safety of the device.

发明内容 SUMMARY

[0003] 本发明的目的在于克服现有技术中存在的不足,提供一种结构巧妙合理、安全可 [0003] The object of the present invention is to overcome the disadvantages present in the prior art, there is provided a smart and reasonable structure, security can be

靠的双重自锁液压缸,该液压缸的活塞杆通过机械自锁和液压自锁两种方式锁定,能克服 By double self-locking hydraulic cylinder, the piston rod of the hydraulic cylinder by hydraulic mechanical self-locking and self-locking lock in two ways, to overcome

活塞杆受力弯曲产生的阻力,使液压缸自锁性更可靠,确保设备的运行安全。 Rod bending resistance force generated by the hydraulic cylinder is more reliable self-locking, to ensure safe operation of the device.

[0004] 按照本发明提供的技术方案,所述双重自锁液压缸包括缸体和装在其内能自由移 [0004] according to the aspect of the present invention provides a double self-locking hydraulic cylinder comprises a cylinder and mounted therein can move freely

动的活塞杆,活塞杆尾端安装有活塞,活塞将缸体分成有杆腔与无杆腔,有杆腔通过有杆腔 Moving a piston rod attached to the trailing end of a piston rod into the cylinder chamber and the rod chamber, the rod chamber through the rod chamber

油口进出液压油,无杆腔通过无杆腔油口进出液压油;缸体的头端连接有缸头,在缸头内侧 Hydraulic oil out of the port, out of the rodless chamber of the hydraulic oil through the oil port rodless chamber; a head end of the cylinder is connected to the cylinder head, the cylinder head inner

的缸体内安装有滑套,缸头与滑套的中心开设有中心孔,活塞杆的头端穿过中心孔,活塞杆 The sleeve is attached to the cylinder, the cylinder head and the center of the sleeve defines a central bore, the head end of the piston rod through the central aperture of the piston rod

与缸头、滑套上的中心孔密封滑动配合;其特征在于,缸体内沿头端向尾端方向分成具有第 And the cylinder head, the sealing sleeve central bore sliding fit; characterized in that the head end of the cylinder into the body along a first direction toward the trailing end

一内径的第一部位和具有第二内径的第二部位,第一内径大于第二内径;缸头、滑套密封装 A first inner diameter portion and a second portion having a second inner diameter larger than the second inner diameter of the first inner diameter; the cylinder head, the sealing sleeve mounted

配在缸体的第一部位内,缸头、滑套之间形成锁紧腔,锁紧腔通过锁紧腔油口进出液压油; With the first portion within the cylinder, the cylinder head, a cavity is formed between the locking sleeve, the locking out of the hydraulic fluid chamber port by a lock chamber;

缸头、滑套之间装有弹簧,弹簧一端紧压在缸头上,另一端将滑套紧压在第一部位的内端面 The cylinder head, between the spring-loaded sleeve, the spring end is pressed against the cylinder head, the other end of the sleeve is pressed against the inner end surface of the first portion

上;所述滑套的另一端面上的中心孔边缘向后轴向延伸形成一延伸段,延伸段的外径小于 On; the edge of the center hole of the other end face of the sleeve extending axially rearwardly to form an extension, the outer diameter is smaller than the extension

所述缸体的第二内径,延伸段尾端的直径逐渐变小,收縮形成锥面;在缸体第二部位的内壁 Second inner diameter of the cylinder, the diameter of the trailing end of the extension gradually decreases, contraction of the tapered surface is formed; the inner wall of the second cylinder portion

上凹设有一环形凹槽,环形凹槽的横断面为弧形或半圆形;在活塞的前端面上设有一环形 The recess is provided with an annular groove, the annular groove of arcuate cross section or a semicircular; front end face provided with an annular piston

凹腔,环形凹腔的周壁上设有一环形槽,环形槽内装配有至少一个钢球,环形凹腔的内径大 Cavity, the peripheral wall of the annular cavity is provided with an annular groove, the annular groove fitted with a large diameter of at least a ball, an annular cavity

于延伸段的外径,延伸段可插入环形凹腔并顶触钢球,钢球的半径小于所述环形凹槽的半 The outer diameter of the extension, extension can be inserted into the annular cavity and the top contact ball, the ball is smaller than half the radius of the annular groove

径,钢球可容置在环形凹槽内。 Diameter steel ball can be housed within the annular groove.

[0005] 作为本发明的进一步改进,所述缸头与滑套相对的端面上分别凹设有用于容置弹簧的缸头弹簧孔与滑套弹簧孔。 [0005] As a further improvement of the present invention, the cylinder head and the sliding sleeve opposite end surfaces of the cylinder head are respectively provided with recessed hole for receiving the spring and the spring sleeve spring hole.

[0006] 作为本发明的进一步改进,所述无杆腔油口、有杆腔油口和锁紧腔油口开设在活塞杆的头端,无杆腔油口通过活塞杆上的无杆腔油道连通至液压缸无杆腔,有杆腔油口通过活塞杆上的有杆腔油道连通至液压缸有杆腔,锁紧腔油口通过活塞杆上的锁紧油道连通至锁紧腔。 [0006] As a further improvement of the present invention, the oil port rodless chamber, the rod chamber and the locking chamber oil ports opened on the head end of the piston rod, rodless chamber through the oil port rodless chamber on the piston rod an oil passage communicated to the rod chamber of the hydraulic cylinder, the rod chamber port oil passage communicating the rod chamber to the cylinder chamber on the piston rod by locking by a lock chamber port communicating oil passage on the piston rod to the lock tight chamber.

[0007] 本发明与现有技术相比,优点在于: [0007] Compared with the prior art, is advantageous in that:

[0008] (1)、采用机械和液压双重自锁设计,以液压锁紧为主,机械锁紧为辅,液压锁紧力大,并且锁紧力可调,自锁技术可靠。 [0008] (1), with mechanical and hydraulic double self-locking design, the main hydraulic lock, supplemented by mechanical locking, hydraulic locking force is large, and the locking force is adjustable, reliable self-locking techniques.

[0009] (2)、活塞杆全部伸出,液压缸锁紧后,可以断掉电源和其它动力源,在没有任何动力的作用下,液压缸可较长时间保持锁紧状态,节省能源。 [0009] (2), the piston rod fully extended, the cylinder lock, the power supply can be cut off and the other power source, without any action of force, the cylinder can be kept locked state for a long time, to save energy.

[0010] (3)、机械和液压双重自锁的性能稳定,密封锁紧可靠,压力损失小,耐压高,结构紧凑,在开、闭锁动作时平缓无冲击和振动。 [0010] (3), a stable mechanical and hydraulic performance of the dual self-locking, the locking seal reliable, small pressure loss, high breakdown voltage, compact structure, in the open, non-smooth locking operation shock and vibration.

附图说明 BRIEF DESCRIPTION

[0011] 图1为本发明的结构示意图。 [0011] FIG. 1 is a schematic structural diagram of the present invention.

[0012] 附图标记说明:1-活塞杆、2-缸头、3-法兰、4-弹簧、5-滑套、6-缸体、7_延伸段、8-环形凹槽、9-锥面、10-钢球、ll-活塞、12-无杆腔、13-第二部位、14-有杆腔、15-锁紧腔、16-第一部位、17-无杆腔油道、18-有杆腔油道、19-无杆腔油口、20-有杆腔油口、21-锁紧腔油口、22-环形凹腔、Dl-第一内径、D2-第二内径。 [0012] REFERENCE NUMERALS: 1 - piston, 2 a cylinder head flange 3-, 4- spring sleeve 5-, 6-cylinder, 7_ extension, an annular groove 8-, 9- tapered surface, 10 ball, LL- piston rod chamber 12-, 13- second portion, 14- rod chamber, the locking cavity 15, the first portion 16-, 17- rodless chamber oil passage, rod chamber oil passage 18, port 19- rodless chamber, the rod chamber port 20, locking chamber ports 21, 22 an annular cavity, a first inner diameter Dl-, D2- second inner diameter.

具体实施方式 detailed description

[0013] 下面结合具体附图和实施例对本发明作进一步说明。 [0013] The following specific embodiments in conjunction with the drawings and embodiments of the present invention will be further described.

[0014] 如图1所示,活塞杆1装在缸体6内并能自由移动,活塞杆1尾端安装有活塞11,活塞11将缸体6分成有杆腔14与无杆腔12 ;缸体6内沿头端向尾端方向分成具有第一内径D1的第一部位16和具有第二内径D2的第二部位13,第一内径D1大于第二内径D2 ;缸体6的头端通过法兰3连接有缸头2,在缸头2内侧的缸体6内安装有滑套5,缸头2与滑套5的中心开设有中心孔,活塞杆1的头端穿过中心孔,活塞杆1与缸头2、滑套5上的中心孔密封滑动配合;缸头2、滑套5密封装配在缸体6的第一部位16内,缸头2、滑套5之间形成锁紧腔15,缸头2、滑套5之间装有具有较强复位功能的弹簧4,缸头2与滑套5相对的端面上分别凹设有用于容置弹簧4的缸头弹簧孔与滑套弹簧孔,弹簧4 一端紧压在缸头2上,另一端将滑套5紧压在第一部位16的内端面上;所述滑套5的另一端面上的中心孔边缘向后轴向延 [0014] As shown, the piston rod 1 is mounted in the cylinder 1 and 6 can move freely, the trailing end of the piston rod 1 is attached to piston 11, the piston 11 into the cylinder 6 has a rod chamber 14 and the rod chamber 12; 6 along the cylinder head into the trailing end portion having a first direction of the first inner diameter D1 and a second portion 16 having the inner diameter D2 of the second 13, the first inner diameter D1 larger than the second diameter D2; head end of the cylinder 6 3 is flanged with a cylinder head 2, sleeve 5 is mounted in the cylinder head 2 inside the cylinder 6, the cylinder head 2 and the center of the sleeve defines a central bore 5, the head end of the piston rod through the center hole 1 the piston rod seal and head 2, the central bore 5 of the cylinder sleeve slidably fitted; a cylinder head 2, the sealing sleeve 5 fitted within the first portion 16 of the cylinder 6, is formed between the cylinder head 2, sleeve 5 4, the cylinder head 2 and the sleeve 5 the end face opposite the locking chamber 15, the cylinder head 2, a strong reset spring loaded sliding sleeve between the cylinder head 5 are respectively provided with recessed hole for receiving the spring of the spring 4 and the spring sleeve hole, one end of the spring 4 is pressed against the cylinder head 2, the other end of the sleeve 5 is pressed against the inner surface of the first end portion 16; said sleeve central bore 5 of the other end face of the edge of the after the axial extension 形成一延伸段7,延伸段7的外径小于所述缸体6的第二内径Dl,延伸段7尾端的直径逐渐变小,收縮形成锥面9 ;在缸体6第二部位13的内壁上凹设有一环形凹槽8,环形凹槽8的横断面为弧形或半圆形;在活塞11的前端面上设有一环形凹腔22,环形凹腔22的周壁上设有一环形槽,环形槽内装配有多个钢球IO,环形凹腔22的内径大于延伸段7的外径,延伸段7可插入环形凹腔22并顶触钢球10,钢球10的半径小于所述环形凹槽8的半径,钢球10可容置在环形凹槽8内;所述活塞杆1的头端开设有无杆腔油口19、有杆腔油口20和锁紧腔油口21,无杆腔油口19通过活塞杆1上的无杆腔油道17连通至液压缸无杆腔12,有杆腔油口20通过活塞杆1上的有杆腔油道18连通至液压缸有杆腔14,锁紧腔油口21通过活塞杆1上的锁紧油道(图中未示出)连通至锁紧腔15。 An extension 7 forming the outer diameter is smaller than the extension 7 of the second inner diameter Dl of the cylinder 6, the trailing end of extension 7 a diameter gradually decreases, forming a tapered surface 9 shrinkage; 6 second inner wall portion of the cylinder 13 the recess is provided with an annular groove 8, the annular groove of arcuate cross section or a semicircular 8; the front end face of the piston 11 is provided with an annular cavity 22, the peripheral wall of the annular cavity 22 is provided with an annular groove, an annular groove fitted with a plurality of steel balls the IO, the inner diameter of the annular cavity 22 is greater than the outer diameter of the extension 7, 7 may be inserted into extension 22 and a top annular cavity 10 touch the ball, the ball 10 is smaller than the radius of the annular the radius of the groove 8, the ball 10 may be received within the annular groove 8; head end of said piston rod defines a rod chamber port 19 absence, rod chamber port 20 and the port 21 locking chamber, rodless chamber 19 communicates through port rodless chamber piston oil passage 117 to the hydraulic cylinder rod chamber 12, the rod chamber port 20 communicating via a piston rod to a hydraulic cylinder rod chamber oil passage 18 has on the one the rod chamber 14, the locking rod chamber port 21 through the oil passages of a lock (not shown) to the lock chamber 15 communicates. [0015] 本发明的工作原理及工作过程如下:[0016] 锁定操作:当无杆腔12进油,有杆腔14及锁紧腔15回油时,液压油推动活塞11和活塞杆1向左运动,活塞杆1伸出,活塞11带动钢球10向左移动,钢球10顶触到滑套5的锥面9并克服弹簧4的推力,推动滑套5向左移动,当移动到一定位置时,钢球10进入缸体6内孔壁上的环形凹槽8内,液压缸到达工作行程,活塞杆1不能再运动;此时,锁紧腔15及无杆腔12进油,有杆腔14回油,弹簧4的弹性复位力合锁紧腔15内进油时产生压力推动滑套5向右运动,滑套5的锥面9将钢球10挤压固定在环形凹槽8内,使活塞杆1与缸体6之间不能相对运动,从而锁住活塞杆1。 [0015] The working process and working principle of the present invention is as follows: [0016] a locking operation: when the rodless chamber 12 into the oil, the oil 15 back to the rod chamber 14 and locking chamber, the hydraulic oil pushes the piston 11 and the piston rod 1 left motion, a piston rod extends, the piston 11 moves to the left drive ball 10, the ball 10 touches the tapered surface 95 of the sliding sleeve against the force of the spring 4 and the push sleeve 5 moves to the left, when moving to when the predetermined position, the ball 10 into the annular groove 6 of the cylinder walls of the hole 8, reach the working stroke of the hydraulic cylinder, the piston rod 1 is no longer movement; in this case, the locking cavity 15 and rodless chamber 12 into the oil, rod chamber 14 back to the oil, the oil pressure is generated when the intake push sleeve 5 moves to the right within the elastic restoring force of the spring 15 the locking engagement chamber 4, the tapered surface 9 of the sleeve 5 fixed to the ball 10 pressed in the annular groove 8, the piston rod 1 and the relative movement between the cylinder 6 can not, thereby locking the piston rod 1.

[0017] 解锁操作:有杆腔14进油,无杆腔12及锁紧腔15回油时,液压油产生的推力首先克服弹簧4的推力推动滑套5向左运动,滑套5的锥面9与钢球10脱离接触,缸体6的环形凹槽8内的钢球10回复自由状态,此时液压缸已解开锁紧;然后液压油产生的压力再推动活塞11和活塞杆1向右运动,活塞杆1縮回缸体6内,钢球10随活塞11 一起向右运动。 [0017] The unlock operation: rod into the oil chamber 14, 15 when the rodless chamber oil return chamber 12 and locking the thrust generated by the hydraulic oil is first pushed against the urging force of the spring 4 moves to the left sleeve 5, the cone sleeve 5 9 surface 10 out of contact with the ball, the ball 8 within the cylinder 10 of the annular groove 6 replies free state, when the locking cylinder is solved; then the hydraulic oil pressure generated and then pushes the piston 11 and the piston rod 1 to the right movement of the piston rod 1 is retracted inside the cylinder 6, the steel ball 10 with the piston 11 moving rightward together.

5 5

Claims (3)

  1. 双重自锁液压缸,包括缸体(6)和装在其内能自由移动的活塞杆(1),活塞杆(1)尾端安装有活塞(11),活塞(11)将缸体(6)分成有杆腔(14)与无杆腔(12),有杆腔(14)通过有杆腔油口(20)进出液压油,无杆腔(12)通过无杆腔油口(19)进出液压油;缸体(6)的头端连接有缸头(2),在缸头(2)内侧的缸体(6)内安装有滑套(5),缸头(2)与滑套(5)的中心开设有中心孔,活塞杆(1)的头端穿过中心孔,活塞杆(1)与缸头(2)、滑套(5)上的中心孔密封滑动配合;其特征在于,缸体(6)内沿头端向尾端方向分成具有第一内径(D1)的第一部位(16)和具有第二内径(D2)的第二部位(13),第一内径(D1)大于第二内径(D2);缸头(2)、滑套(5)密封装配在缸体(6)的第一部位(16)内,缸头(2)、滑套(5)之间形成锁紧腔(15),锁紧腔(15)通过锁紧腔油口(21)进出液压油;缸头(2)、滑套(5)之间装有弹簧(4),弹簧(4)一端紧压在缸头(2)上 Double locking cylinder, comprising a cylinder (6) mounted therein and the piston rod can move freely in (1), a piston rod (1) attached to the trailing end of the piston (11), the piston (11) the cylinder (6) into the rod cavity (14) and the rod chamber (12), the rod cavity (14) through the rod chamber port (20) out of the hydraulic oil, the rod chamber (12) and out through the rodless chamber port (19) hydraulic oil; head end of the cylinder (6) is connected to the cylinder head (2) mounted within the sleeve (6) in the cylinder head (2) inside the cylinder (5), a cylinder head (2) and the sleeve ( 5) center defines a central bore, the piston rod (1) through the central bore of the head end of the piston rod (1) and the cylinder head (2), the central hole in the sleeve (5) a sealing sliding fit; characterized in that (13), a first inner diameter (16) and a second portion having a second inner diameter (D2) of the cylinder (6) along the trailing end of the head end into a first portion having a first inner diameter direction (D1) of (D1 ) is greater than the second inner diameter (D2 of); in the first cylinder portion (6) (16), between the cylinder head (2), sleeve (5) of the cylinder head (2), sleeve (5) a sealing assembly forming a locking chamber (15), a locking chamber (15) by a lock chamber port (21) out of the hydraulic oil; spring loaded between the cylinder head (2), sleeve (5) (4), a spring (4 ) pressed against the end of the cylinder head (2) 另一端将滑套(5)紧压在第一部位(16)的内端面上;所述滑套(5)的另一端面上的中心孔边缘向后轴向延伸形成一延伸段(7),延伸段(7)的外径小于所述缸体(6)的第二内径(D1),延伸段(7)尾端的直径逐渐变小,收缩形成锥面(9);在缸体(6)第二部位(13)的内壁上凹设有一环形凹槽(8),环形凹槽(8)的横断面为弧形或半圆形;在活塞(11)的前端面上设有一环形凹腔(22),环形凹腔(22)的周壁上设有一环形槽,环形槽内装配有至少一个钢球(10),环形凹腔(22)的内径大于延伸段(7)的外径,延伸段(7)可插入环形凹腔(22)并顶触钢球(10),钢球(10)的半径小于所述环形凹槽(8)的半径,钢球(10)可容置在环形凹槽(8)内。 The other end of the sliding sleeve (5) pressed against the inner surface of the first end portion (16); a center hole of the edge of the other end surface of the sliding sleeve (5) forming a rearwardly axially extending extension (7) , extension of the outer diameter (7) smaller than said cylinder (6) a second inner diameter (Dl), extension (7) trailing end gradually decreases in diameter, forming tapered contraction (9); in the cylinder (6 ) is provided on the inner wall of the second recess portion (13) is an annular groove (8), an annular groove cross-section (8) is arcuate or semicircular; provided with an annular recess in the front face of the piston (11) circumferential chamber (22), an annular cavity (22) is provided with an annular groove wall of the annular groove is fitted with at least one steel ball (10), the inner diameter of the annular cavity (22) is greater than the extension (7) of the outer diameter, extension (7) can be inserted into the annular cavity (22) and a top contact ball (10), the radius of the ball (10) is smaller than the annular groove (8) of the radius of the steel ball (10) may be housed in an annular groove (8).
  2. 2. 如权利要求l所述的双重自锁液压缸,其特征还在于,所述缸头(2)与滑套(5)相对的端面上分别凹设有用于容置弹簧(4)的缸头弹簧孔与滑套弹簧孔。 2. The dual self-locking hydraulic cylinder according to claim l, further characterized in that said cylinder head (2) and the sliding sleeve (5) opposite the end face of the cylinder are provided with recesses for receiving the spring (4) head spring sleeve hole and the spring hole.
  3. 3. 如权利要求l所述的双重自锁液压缸,其特征还在于,所述无杆腔油口(19)、有杆腔油口(20)和锁紧腔油口(21)开设在活塞杆(1)的头端,无杆腔油口(19)通过活塞杆(1)上的无杆腔油道(17)连通至液压缸无杆腔(12),有杆腔油口(20)通过活塞杆(1)上的有杆腔油道(18)连通至液压缸有杆腔(14),锁紧腔油口(21)通过活塞杆(1)上的锁紧油道连通至锁紧腔(15)。 3. The double locking cylinder as claimed in claim l, further characterized in that the rodless chamber port (19), the rod chamber port (20) and the locking chamber port (21) opened in a piston rod (1) head end, the rodless chamber oil port (19) via the piston rod rodless chamber oil passages (1) (17) communicated to the hydraulic cylinder rod chamber (12), the rod chamber port ( 20) the rod chamber (14), a locking chamber port (21) through oil passages locking rod (1) an oil passage communicating the rod chamber (18) communicated to the hydraulic cylinder via a piston rod (1) has on to the locking chamber (15).
CN 201010121462 2010-03-10 2010-03-10 Double self locking hydraulic cylinder CN101782090A (en)

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Publication number Priority date Publication date Assignee Title
CN102032238A (en) * 2011-01-17 2011-04-27 江阴市洪腾机械有限公司 External control type self-locking hydraulic cylinder
CN102207116A (en) * 2011-07-15 2011-10-05 四川大学 Floating guide hydraulic cylinder
CN103511388A (en) * 2013-09-17 2014-01-15 兰继红 Lifting hydraulic cylinder used for electroplating suspension rod
CN106481613A (en) * 2016-08-25 2017-03-08 北京冶自欧博科技发展有限公司 Mechanical-hydraulic double security locking hydraulic cylinder

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GB573033A (en) * 1943-10-08 1945-11-02 Dowty Equipment Ltd Improvements in locking means for telescopic jacks
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CN201407243Y (en) * 2009-05-27 2010-02-17 陕西燎原国际航空制造有限公司 Oil cylinder mechanical self-locking device
CN201636130U (en) * 2010-03-10 2010-11-17 无锡市长江液压缸厂 Dual self-locking hydraulic cylinder

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Publication number Priority date Publication date Assignee Title
GB573033A (en) * 1943-10-08 1945-11-02 Dowty Equipment Ltd Improvements in locking means for telescopic jacks
US4116113A (en) * 1976-01-26 1978-09-26 Wabco Westinghouse Spring actuated brake cylinder device with fluid pressure operable release piston lockout means
US4989828A (en) * 1990-07-25 1991-02-05 Grumman Aerospace Corporation Ball lock control valve actuation plunger-mechanical type
DE10343714A1 (en) * 2003-09-20 2005-04-28 Niemann Wolfgang Lockable pneumatic cylinder
CN2851679Y (en) * 2005-09-30 2006-12-27 北京市液压技术研究所 Hydraulic cylinder with mechanical lock
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102032238A (en) * 2011-01-17 2011-04-27 江阴市洪腾机械有限公司 External control type self-locking hydraulic cylinder
CN102032238B (en) 2011-01-17 2012-12-19 江阴市洪腾机械有限公司 External control type self-locking hydraulic cylinder
CN102207116A (en) * 2011-07-15 2011-10-05 四川大学 Floating guide hydraulic cylinder
CN103511388A (en) * 2013-09-17 2014-01-15 兰继红 Lifting hydraulic cylinder used for electroplating suspension rod
CN106481613A (en) * 2016-08-25 2017-03-08 北京冶自欧博科技发展有限公司 Mechanical-hydraulic double security locking hydraulic cylinder

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