WO2015188647A1 - Cylindre de pression à action unique - Google Patents

Cylindre de pression à action unique Download PDF

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Publication number
WO2015188647A1
WO2015188647A1 PCT/CN2015/075470 CN2015075470W WO2015188647A1 WO 2015188647 A1 WO2015188647 A1 WO 2015188647A1 CN 2015075470 W CN2015075470 W CN 2015075470W WO 2015188647 A1 WO2015188647 A1 WO 2015188647A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston rod
acting
return spring
cylinder
rear end
Prior art date
Application number
PCT/CN2015/075470
Other languages
English (en)
Chinese (zh)
Inventor
吴建友
钟康民
窦云霞
Original Assignee
苏州劳灵精密机械有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201410259327.0A external-priority patent/CN104006024A/zh
Priority claimed from CN201410260757.4A external-priority patent/CN104019079B/zh
Application filed by 苏州劳灵精密机械有限公司 filed Critical 苏州劳灵精密机械有限公司
Priority to DE112015000735.0T priority Critical patent/DE112015000735T5/de
Publication of WO2015188647A1 publication Critical patent/WO2015188647A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1476—Special return means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1466—Hollow piston sliding over a stationary rod inside the cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7052—Single-acting output members

Definitions

  • the invention relates to a single acting pressure cylinder, in particular a single acting pneumatic cylinder or hydraulic cylinder.
  • Single-acting cylinders and hydraulic cylinders compared with double-acting cylinders and hydraulic cylinders, have a simple structure and low cost.
  • the main reason is that a single-acting cylinder or hydraulic cylinder requires only one pipe for entering or leaving gas or liquid, and a double-acting cylinder or hydraulic cylinder.
  • the cylinder needs two.
  • a static sealing device is required between the front end cover of the double-acting cylinder and the hydraulic cylinder and the cylinder barrel, and a dynamic sealing device is also required between the piston rod and the inner hole of the front end cover, as shown in FIG.
  • Fig. 2 The basic structure of the conventional single-acting cylinder and hydraulic cylinder is shown in Fig. 2.
  • the most prominent disadvantage is that the return spring generally needs about one-third of the axial space, which causes the axial dimension of the cylinder to increase. This not only wastes material, but also significantly increases costs.
  • a single-acting pressure cylinder comprising a cylinder block, a front end cover and a rear end cover fixed to the cylinder block, a piston rod inserted in the cylinder body, and a piston rod
  • An inner hole is defined in an axial direction thereof, a sliding member is slidably inserted into the inner hole from a rear end of the piston rod, and a rear end of the sliding member is fixedly connected to the rear end cover, and the inner hole is disposed in the inner hole
  • a return spring that provides a restoring force to the piston rod, the return spring being arranged between the sliding member and the piston rod.
  • the slider is a guide rod assembly including a rod body and a large diameter end fixedly disposed at a front end of the rod body, the rear end of the rod body being fixedly coupled to the rear end cover
  • the piston rod is fixedly coupled to the rear end of the inner hole with a cover having a socket, wherein the cover forms an annular space with the large diameter end, and the return spring is located in the annular space.
  • the return spring is a compression spring.
  • the compression spring is used as the return spring, and its rigidity has a larger selection range than the general coil spring.
  • the return spring is preferably a nonlinear butterfly spring, and due to its non-linear characteristics, the restoring force of the spring can be controlled within a small range.
  • a return spring is sleeved on the rod.
  • the large diameter end is integrally provided with the rod body, or the large diameter end is fixedly connected to the rod body.
  • the inner hole on the piston rod is a through hole, and the piston rod is fixedly connected with the force output element at the front end of the inner hole.
  • the slider is a spool, and a closed space is formed between the front end of the spool and the inner bore, and the return spring is located in the closed space.
  • the inner hole of the piston rod is a through hole, and a front end of the piston rod is fixedly connected with a force output element, and the return spring is located between the force output element and the spool.
  • the present invention has the following advantages over the prior art: the single-acting pressure cylinder of the present invention can be used for a single-acting hydraulic cylinder or a single-acting pneumatic cylinder, wherein the return spring is placed inside the piston rod In the hole, it is not necessary to occupy the axial space of the hydraulic cylinder or the pneumatic cylinder, thereby greatly reducing the axial size of the cylinder, and significantly reducing the manufacturing cost.
  • the diameter of the cylinder is greatly reduced compared with the prior art, and the mechanical efficiency of the single-acting thrust cylinder is effectively improved, so that it has good energy saving.
  • FIG. 1 is a schematic view showing the working principle of a double-acting cylinder in the prior art
  • FIG. 2 is a schematic view showing the working principle of a conventional single-acting thrust cylinder in the prior art
  • FIG. 3 is a schematic view showing the working principle of a single-acting plunger cylinder using a tension spring reset in the prior art
  • Figure 4 is a first schematic diagram showing the working principle of a single-acting pressure cylinder according to a first embodiment of the present invention
  • Figure 5 is a second schematic diagram of the working principle of the single-acting pressure cylinder according to the first embodiment of the present invention.
  • Figure 6 is a third schematic diagram of the working principle of the single-acting pressure cylinder according to the first embodiment of the present invention.
  • Figure 7 is a schematic view showing the internal structure of a single-acting pressure cylinder according to a second embodiment of the present invention.
  • Figure 8 is a second internal schematic view of a single-acting pressure cylinder according to a second embodiment of the present invention.
  • Figure 9 is a third internal structural view of a single-acting pressure cylinder according to a second embodiment of the present invention.
  • the pressure cylinder in this embodiment is a single-acting thrust cylinder, and includes a cylinder block 1, and a front end cover 2 disposed at the front of the cylinder block 1.
  • a rear end cover 3 provided at the rear of the cylinder block 1 and a piston rod 4 provided in the cylinder block 1 movable in the front-rear direction, wherein the front end of the piston rod 4 passes outside the front end cover 2.
  • the above and below definitions of the directions are defined by the direction in which the piston rod 4 moves when the thrust cylinder is in operation.
  • the direction in which the piston rod 4 moves outward relative to the cylinder block 1 is the front, and vice versa, that is, FIG. In the left and right direction in Fig. 9, the left side is the rear and the right side is the front side.
  • the piston rod 4 is provided with an inner hole 41, and the front portion of the inner hole 41 is closed.
  • the inner bore 41 is provided as a through hole, and the front end of the piston rod 4 is fixedly provided with a force output member 9 which closes the front portion of the inner bore 41.
  • a sliding member 5 is bored in the inner hole 41.
  • the sliding member in the present example is a guiding rod assembly including a rod body 51 and a large diameter end 52 fixedly disposed at the front end of the rod body 51, the rod body 51 and the large diameter
  • the ends 52 can be integrally formed, and the two can be separately disposed and fixedly coupled together by screws or other components.
  • the rear end of the rod body 51 is fixedly coupled to the rear end cover 3, and the rear end of the inner hole 41 of the piston rod 4 is fixedly coupled to the door cover 6, and the door cover 6 has an insertion hole 61 for the rod body 51 to pass therethrough.
  • An annular space is formed between the cover 6 and the large diameter end 52 in the inner bore 41, and a return spring 7 is provided in the annular space.
  • the return spring 7 employs a compression spring.
  • the front end cover 2 is also provided with a first hole 21 as a breathing hole, so that the space between the piston rod 4 and the front end cover 2 communicates with the outside, so that the smooth movement of the piston rod 4 can be ensured.
  • the air pressure formed in the above space is prevented from forming a resistance to the forward and backward movement of the piston rod 4.
  • the return spring 7 employs a nonlinear butterfly spring which is sleeved on the rod body 51 in the above-mentioned annular space. Since the mechanical properties of the butterfly spring are nonlinear, when the butterfly spring is selected, a reasonable mechanical characteristic interval can be selected according to the working conditions of the actual application, so that the variation range of the spring restoring force can be greatly reduced, and the single can be effectively improved.
  • the mechanical efficiency of the thrust cylinder is conducive to energy saving.
  • the traditional tension coil spring is linear because its mechanical characteristics are linear, and its stiffness is proportional to its deformation. When the deformation amount is large, the restoring force is significantly increased, and this resetting force needs to consume the piston to provide additional force. Overcoming, it is bound to cause the cylinder bore to expand under certain conditions of system pressure. The present invention solves this problem well, and the diameter of the cylinder body is further reduced compared with the prior art.
  • the butterfly spring can be in the form of a lamination to increase the rigidity, which makes the thrust of the thrust cylinder output of the present invention have a larger adjustment range, so that it has better versatility.
  • the single-acting thrust cylinder of the present invention can be used as a single-acting hydraulic cylinder or a single-acting pneumatic cylinder, wherein the reset spring 7 is used to reset, and the return spring 7 does not need to occupy the axial space of the thrust cylinder, thereby
  • the axial dimension of the cylinder block 1 is greatly reduced, material is saved, and the manufacturing cost is remarkably reduced.
  • the resetting force of the return spring 7 used has a small range of variation, which effectively improves the mechanical efficiency of the single-acting thrust cylinder, and has good energy saving.
  • the thrust cylinder only the static seal between the rear end cover 3 and the cylinder block 1 and the dynamic seal between the piston rod 4 and the cylinder block 1 are required to be sealed, and the structure is simpler and the assembly is simpler. Good assembly processability.
  • the pressure cylinder in this embodiment is a single-acting tension cylinder, and the embodiment is similar to the structure of the first embodiment.
  • the main difference is that the sliding member 5 in the embodiment is a sliding column.
  • a closed space is formed between the front end of the strut and the force output member 9, and the return spring 7 is located in the closed space.
  • the rear end of the inner hole 41 of the piston rod 4 in this embodiment is not provided with a stopper.
  • the embodiment also has some differences in Embodiment 1, such as: the second hole 31 on the rear end cover 3 serves as a breathing hole, so that the space between the piston rod 4 and the rear end cover 3 communicates with the outside, such that The smooth movement of the piston rod 4 can be ensured, and the air pressure formed in the above space can be prevented from forming a resistance to the forward and backward movement of the piston rod 4.
  • the spool 5 is provided with a through hole extending in the axial direction thereof, and the rear portion of the spool 5 has an opening, the opening allows the through hole to communicate with the breathing hole 31 in an air flow direction, and the front end of the spool 5 and the force output member 9 are avoided.
  • the pressure in the enclosed space formed between the rear ends creates resistance to the forward and backward movement of the piston rod 4.
  • the first hole 21 on the front end cover 2 serves as an intake hole/oil hole.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)

Abstract

L'invention concerne un cylindre de pression à action unique comprenant un corps (1) de cylindre, un couvercle d'extrémité avant (2), un couvercle d'extrémité arrière (3) et une tige (4) de piston. Un trou intérieur (41) est ménagé sur la tige (1) de piston et s'étend dans la direction axiale de celle-ci. Un élément coulissant (5) est introduit coulissant dans le trou intérieur (41) depuis l'extrémité arrière de la tige (4) de piston. L'extrémité arrière de l'élément coulissant (5) est reliée à demeure au couvercle d'extrémité arrière (3). Dans le trou intérieur (41) est agencé un ressort de rappel (7) utilisé pour donner à la tige (4) de piston une force de rétablissement. Le ressort de rappel (7) est agencé entre l'élément coulissant (5) et la tige (4) de piston. Le cylindre de pression à action unique peut être utilisé comme cylindre hydraulique à action unique ou comme cylindre pneumatique à action unique, a une structure simple, une dimension axiale réduite, une grande aptitude à la fabrication d'assemblage et des coûts de fabrication peu élevés, et permet d'accroître l'efficacité mécanique.
PCT/CN2015/075470 2014-06-12 2015-03-31 Cylindre de pression à action unique WO2015188647A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112015000735.0T DE112015000735T5 (de) 2014-06-12 2015-03-31 Einfach wirkender Druckzylinger

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201410259327.0A CN104006024A (zh) 2014-06-12 2014-06-12 单作用拉力缸
CN201410259327.0 2014-06-12
CN201410260757.4A CN104019079B (zh) 2014-06-12 2014-06-12 一种单作用推力缸
CN201410260757.4 2014-06-12

Publications (1)

Publication Number Publication Date
WO2015188647A1 true WO2015188647A1 (fr) 2015-12-17

Family

ID=54832865

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2015/075470 WO2015188647A1 (fr) 2014-06-12 2015-03-31 Cylindre de pression à action unique

Country Status (2)

Country Link
DE (1) DE112015000735T5 (fr)
WO (1) WO2015188647A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108407706A (zh) * 2018-03-08 2018-08-17 太仓东泰精密机械有限公司 一种房车水平拓展防止夹住系统

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1344074A (en) * 1970-03-24 1974-01-16 Lansin Bagnall Ltd Fluid energised rams
US20070209357A1 (en) * 2006-03-13 2007-09-13 Sumitomo Precision Products Co., Ltd. Reservoir built-in type actuator
CN103711742A (zh) * 2012-10-08 2014-04-09 毛孟其 一种气缸的改进结构
CN203570749U (zh) * 2013-10-28 2014-04-30 杨蕾蕾 一种气液压缸旋转机构
CN104006024A (zh) * 2014-06-12 2014-08-27 苏州劳灵精密机械有限公司 单作用拉力缸
CN104019079A (zh) * 2014-06-12 2014-09-03 苏州劳灵精密机械有限公司 一种单作用推力缸

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1344074A (en) * 1970-03-24 1974-01-16 Lansin Bagnall Ltd Fluid energised rams
US20070209357A1 (en) * 2006-03-13 2007-09-13 Sumitomo Precision Products Co., Ltd. Reservoir built-in type actuator
CN103711742A (zh) * 2012-10-08 2014-04-09 毛孟其 一种气缸的改进结构
CN203570749U (zh) * 2013-10-28 2014-04-30 杨蕾蕾 一种气液压缸旋转机构
CN104006024A (zh) * 2014-06-12 2014-08-27 苏州劳灵精密机械有限公司 单作用拉力缸
CN104019079A (zh) * 2014-06-12 2014-09-03 苏州劳灵精密机械有限公司 一种单作用推力缸

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108407706A (zh) * 2018-03-08 2018-08-17 太仓东泰精密机械有限公司 一种房车水平拓展防止夹住系统

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Publication number Publication date
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