TWI686546B - Exhaustable hydraulic cylinder and system thereof - Google Patents

Exhaustable hydraulic cylinder and system thereof Download PDF

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Publication number
TWI686546B
TWI686546B TW108100259A TW108100259A TWI686546B TW I686546 B TWI686546 B TW I686546B TW 108100259 A TW108100259 A TW 108100259A TW 108100259 A TW108100259 A TW 108100259A TW I686546 B TWI686546 B TW I686546B
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cylinder
piston
wall surface
exhaustable
hydraulic
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TW108100259A
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Chinese (zh)
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TW202022240A (en
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郭本源
朱冏昇
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油順精密股份有限公司
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    • 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
    • F15B15/1409—Characterised by the construction of the motor unit of the straight-cylinder type with two or more independently movable working pistons
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/22—Synchronisation of the movement of two or more servomotors
    • 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
    • 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
    • F15B15/1428—Cylinders
    • 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
    • F15B15/1447—Pistons; Piston to piston rod assemblies
    • F15B15/1452—Piston sealings

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

Abstract

The present invention discloses an exhaustable hydraulic cylinder and system thereof. The hydraulic cylinder comprising a cylinder housing, a piston, a sealing ring provided on the piston, and an exhaust hole formed in the cylinder housing. The cylinder housing has an upper chamber, an upper passage, an upper connector communicating with the upper chamber via the upper passage, a lower chamber, a lower passage, and a lower connector communicating with the lower chamber via the lower passage. The exhaust hole is communicating with the lower connector and is located above the lower passage.When the piston is located at a start position and the sealing ring is below the exhaust hole, the exhaust hole communicates with the upper chamber, and when the piston moves to an end position and the sealing ring is above the exhaust hole, the exhaust hole communicates with the lower chamber.

Description

可排氣的油壓缸及其系統Exhaustable hydraulic cylinder and its system

本發明與油壓缸有關，尤其涉及同步油壓缸。 The invention relates to a hydraulic cylinder, and particularly relates to a synchronous hydraulic cylinder.

在許多需要兩支或多支油壓缸同步運作的場合中，經常採取串聯式同步油壓缸系統，此可參見中國CN 104806589B、CN 205423367 U及CN 207131652 U等專利，以及台灣M562347專利。 In many occasions where two or more hydraulic cylinders are required to operate synchronously, a series synchronous hydraulic cylinder system is often adopted. This can be found in Chinese patents such as CN 104806589B, CN 205423367 U, and CN 207131652 U, and Taiwan's M562347 patent.

然而，現有的兩同步油壓缸於組接形成串聯式同步油壓缸系統之後，難免會有空氣殘留於系統中。以CN 104806589B專利為例，兩同步液压缸以管路完成連接後，第一腔體、第三腔體與管路之間的空間內難免會有殘留的空氣，這些空氣會隨著第一活塞與第二活塞的移動而在該空間內跑來跑去，無法排出，從而影響該兩同步液压缸的同步運作與使用壽命。 However, after the existing two synchronous hydraulic cylinders are assembled to form a series synchronous hydraulic cylinder system, it is inevitable that air will remain in the system. Taking the patent of CN 104806589B as an example, after the two synchronous hydraulic cylinders are connected by the pipeline, there will inevitably be residual air in the space between the first cavity, the third cavity and the pipeline, which will follow the first piston Running with the movement of the second piston in the space cannot be discharged, thereby affecting the synchronous operation and service life of the two synchronous hydraulic cylinders.

為解決上述問題，本發明提供一種可排氣的油壓缸，使用這種油壓缸所形成的串聯式同步油壓缸系統，可將系統內的空氣予以排出。 In order to solve the above problems, the present invention provides an exhaustable hydraulic cylinder. The series synchronous hydraulic cylinder system formed by using the hydraulic cylinder can exhaust the air in the system.

更詳而言之，本發明之可排氣的油壓缸包括一缸體、一活塞、一活塞桿、一密封環及一排出孔。缸體具有一上腔 室、一上孔道、經由上孔道連通該上腔室的一上接頭、一下腔室、一下孔道、及經由下孔道連通下腔室的一下接頭。活塞可移動地設於缸體內，且能在缸體內的一起點與一終點之間往返移動。活塞桿連接活塞。密封環套於活塞上，且具有一外周壁緊貼於缸體的一內壁面而形成密封，藉以隔離該上、下腔室。排出孔設於缸體上，且連通下接頭，及位於下孔道的上方。其中，當活塞位於起點而使密封環位於排出孔下方時，排出孔連通該上腔室，當活塞往終點移動到使密封環位於排出孔上方時，排出孔連通下腔室。 More specifically, the exhaustable hydraulic cylinder of the present invention includes a cylinder, a piston, a piston rod, a seal ring, and a discharge hole. The cylinder has an upper cavity A chamber, an upper orifice, an upper joint that communicates with the upper chamber through the upper orifice, a lower chamber, a lower orifice, and a lower joint that communicates with the lower chamber through the lower orifice. The piston is movably arranged in the cylinder, and can move back and forth between a point in the cylinder and an end point. The piston rod is connected to the piston. The sealing ring is sleeved on the piston, and has an outer peripheral wall clinging to an inner wall surface of the cylinder body to form a seal, thereby isolating the upper and lower chambers. The discharge hole is provided on the cylinder body, and communicates with the lower joint, and is located above the lower hole channel. Wherein, when the piston is at the starting point and the seal ring is below the discharge hole, the discharge hole communicates with the upper chamber, and when the piston moves to the end point so that the sealing ring is above the discharge hole, the discharge hole communicates with the lower chamber.

在一實施例中，上述排出孔具有通往該下腔室的一小徑段及通往該下接頭的一大徑段。 In one embodiment, the discharge hole has a small diameter section leading to the lower chamber and a large diameter section leading to the lower joint.

在一實施例中，上述下孔道的內徑大於排出孔，且下孔道的內徑等於上孔道的內徑。 In an embodiment, the inner diameter of the above lower channel is larger than the discharge hole, and the inner diameter of the lower channel is equal to the inner diameter of the upper channel.

在一實施例中，本發明之可排氣的油壓缸還包括一O型環，O型環套於活塞上，且夾於活塞與密封環之間。 In one embodiment, the exhaustable hydraulic cylinder of the present invention further includes an O-ring, which is sleeved on the piston and sandwiched between the piston and the seal ring.

在一實施例中，本發明之可排氣的油壓缸還包括套於活塞上且位於密封環上方的一耐磨環，耐磨環的一外周壁抵靠於該缸體的一內壁面。 In an embodiment, the exhaustable hydraulic cylinder of the present invention further includes a wear ring sleeved on the piston and located above the sealing ring, an outer peripheral wall of the wear ring abuts an inner wall surface of the cylinder body .

本發明還提供一種串聯式同步油壓缸系統，此一系統包括一連接管及兩支上述的可排氣的油壓缸，該連接管的兩端分別連接其中一可排氣的油壓缸的上接頭及另一可排氣的油壓缸的下接頭，且其中一可排氣的油壓缸的上腔室用於容納液壓油的容積等於另一可排氣的油壓缸的下腔室用於容納該液壓油的容積。 The invention also provides a tandem synchronous hydraulic cylinder system. This system includes a connecting pipe and two of the above-mentioned exhaustable hydraulic cylinders. The two ends of the connecting pipe are respectively connected to one of the exhaustable hydraulic cylinders. The upper joint and the lower joint of another exhaustable hydraulic cylinder, and the upper chamber of one exhaustable hydraulic cylinder is used for accommodating the volume of hydraulic oil equal to the lower chamber of the other exhaustable hydraulic cylinder The volume of the chamber for containing the hydraulic oil.

在一實施例中，本發明上述系統中的其中一可排氣的油壓缸的該缸體的內徑大於另一可排氣的油壓缸的該缸體的內徑。 In an embodiment, the inner diameter of the cylinder of one of the exhaustable hydraulic cylinders in the above system of the present invention is larger than the inner diameter of the cylinder of the other exhaustable hydraulic cylinder.

藉由上述排出孔的設置，可將串聯式同步油壓缸系統內的空氣排出，確保串聯式同步油壓缸系統在運作上的同步性及增加使用壽命。 With the arrangement of the above-mentioned discharge holes, the air in the series synchronous hydraulic cylinder system can be discharged, ensuring the synchronization of the series synchronous hydraulic cylinder system in operation and increasing the service life.

1、1a:油壓缸 1. 1a: hydraulic cylinder

11、11a:缸體 11, 11a: cylinder

110:內壁面 110: inner wall surface

110a:外壁面 110a: outer wall surface

111、111a:上腔室 111, 111a: upper chamber

112、112a:下腔室 112, 112a: lower chamber

113、113a:上接頭 113, 113a: upper connector

114、114a:上孔道 114, 114a: Upper hole

115、115a:下接頭 115, 115a: lower connector

116、116a:下孔道 116, 116a: Lower hole

12、12a:活塞 12, 12a: Piston

13、13a:活塞桿 13, 13a: Piston rod

14、14a:密封環 14, 14a: sealing ring

15、15a:排出孔 15, 15a: discharge hole

16、16a:耐磨環 16, 16a: wear ring

131、131a:O型環 131, 131a: O-ring

2:連接管 2: connecting pipe

圖1顯示本發明之較佳實施例的剖視圖(活塞位於起點)。 Figure 1 shows a cross-sectional view of a preferred embodiment of the present invention (piston at the starting point).

圖2顯示本發明之較佳實施例的剖視圖(活塞位於終點)。 Figure 2 shows a cross-sectional view of the preferred embodiment of the present invention (piston at the end).

圖3顯示本發明之較佳實施例的部份放大剖視圖。 Figure 3 shows a partially enlarged cross-sectional view of a preferred embodiment of the present invention.

圖1、2顯示本發明之可排氣的油壓缸的一個較佳實施例，在此實施例中，兩支可排氣的油壓缸1與1a以一連接管2連接形成一串聯式同步油壓缸系統。其中一支可排氣的油壓缸1包括一缸體11、一活塞12、一活塞桿13、一密封環14及一排出孔15。缸體11具有一內壁面110、一外壁面110a、均由內壁面110所界定的一上腔室111及一下腔室112。活塞12可移動地設於缸體11內，且可在缸體11內的一起點(如圖1所示)與一終點(如圖2所示)之間往返移動。活塞桿13連接活塞12，位於上腔室111內且向前伸出缸體11外面，並能隨著活塞12的移動而作伸縮。缸體11還具有一上接頭113及從內壁面110貫穿到外壁面110a的一上孔道114，上接頭113設於缸體11的外壁面110a，並直接連通上孔道114，且經由上孔道114連通上腔室111。缸體11另具有一下接頭115及從內壁面110貫穿到外壁面110a的一下孔道116，下接頭115設於缸體11的外壁面110a，並直接連通下孔道116，且經由下孔道116連通下腔室112。 Figures 1 and 2 show a preferred embodiment of the exhaustable hydraulic cylinder of the present invention. In this embodiment, two exhaustable hydraulic cylinders 1 and 1a are connected by a connecting pipe 2 to form a series synchronization Hydraulic cylinder system. One of the exhaustable hydraulic cylinders 1 includes a cylinder body 11, a piston 12, a piston rod 13, a sealing ring 14 and a discharge hole 15. The cylinder 11 has an inner wall surface 110, an outer wall surface 110a, an upper chamber 111 and a lower chamber 112 all defined by the inner wall surface 110. The piston 12 is movably disposed in the cylinder 11 and can move back and forth between a joint point (as shown in FIG. 1) and an end point (as shown in FIG. 2) in the cylinder 11. The piston rod 13 is connected to the piston 12 and is located in the upper chamber 111 and protrudes forward from the outside of the cylinder 11, and can expand and contract with the movement of the piston 12. The cylinder 11 also has an upper joint 113 and an upper hole 114 penetrating from the inner wall surface 110 to the outer wall surface 110a. The upper joint 113 is provided on the outer wall surface 110a of the cylinder body 11 and directly communicates with the upper hole 114 and passes through the upper hole 114通上上室111。 Communicate the upper chamber 111. The cylinder body 11 further has a lower joint 115 and a lower hole 116 penetrating from the inner wall surface 110 to the outer wall surface 110a. The lower joint 115 is provided on the outer wall surface 110a of the cylinder body 11 and directly communicates with the lower hole 116 and communicates with the lower hole 116室112。 The chamber 112.

如圖1及3所示，密封環14套於活塞12上，且密封環14的外周壁緊貼於缸體11的內壁面110而形成密封，藉以隔離上腔室111及下腔室112，使得此二者內的液壓油或其它介質不會從一者洩漏到另一者內。在此實施例中，密封環14與活塞12之間還夾設一O型環131。此外，活塞12還套設一耐磨環16位於密封環14的上方，確保活塞12直上直下地移動而不偏。耐磨環16的 外周壁雖抵靠於缸體11的內壁面110，但沒有像密封環14那樣形成密封。 As shown in FIGS. 1 and 3, the sealing ring 14 is sleeved on the piston 12, and the outer peripheral wall of the sealing ring 14 is closely attached to the inner wall surface 110 of the cylinder 11 to form a seal, thereby isolating the upper chamber 111 and the lower chamber 112, So that the hydraulic oil or other media in the two will not leak from one to the other. In this embodiment, an O-ring 131 is also interposed between the sealing ring 14 and the piston 12. In addition, the piston 12 is also sleeved with a wear ring 16 located above the sealing ring 14 to ensure that the piston 12 moves straight up and down without deviation. Wear ring 16 Although the outer peripheral wall abuts against the inner wall surface 110 of the cylinder 11, it does not form a seal like the seal ring 14.

排出孔15從缸體11的內壁面110貫穿到外壁面110a，且直接連通下接頭115，及位於下孔道116的上方。當活塞12位於如圖1所示的起點而使密封環14位於排出孔15下方時，排出孔15連通上腔室111，下孔道116位於密封環14下方而連通下腔室112。當活塞12往終點移動到使密封環14位於排出孔15上方時，排出孔15與下孔道116均連通下腔室112。其中，排出孔15的內徑較佳是小於下孔道116。 The discharge hole 15 penetrates from the inner wall surface 110 of the cylinder 11 to the outer wall surface 110 a, and directly communicates with the lower joint 115 and is located above the lower hole 116. When the piston 12 is located at the starting point shown in FIG. 1 and the seal ring 14 is located below the discharge hole 15, the discharge hole 15 communicates with the upper chamber 111, and the lower bore 116 is located below the seal ring 14 to communicate with the lower chamber 112. When the piston 12 moves to the end point so that the sealing ring 14 is located above the discharge hole 15, the discharge hole 15 and the lower hole 116 both communicate with the lower chamber 112. Among them, the inner diameter of the discharge hole 15 is preferably smaller than the lower hole 116.

另一支可排氣的油壓缸1a結構相同於上述可排氣的油壓缸1，故同樣包括一缸體11 a、一活塞12 a、一活塞桿13 a、一密封環14 a及一排出孔15 a，缸體11 a同樣具有一上腔室111a、一下腔室112a、一上接頭113a、一上孔道114 a、一下接頭115a及一下孔道116 a。活塞12 a上同樣套有一密封環14 a、O型環131 a及一耐磨環16 a。這些構件的結構與功能均相同於上述可排氣的油壓缸1的對應構件，容不贅述。 The structure of the other exhaustable hydraulic cylinder 1a is the same as that of the above-mentioned exhaustable hydraulic cylinder 1, so it also includes a cylinder 11a, a piston 12a, a piston rod 13a, a sealing ring 14a and A discharge hole 15a, the cylinder 11a also has an upper chamber 111a, a lower chamber 112a, an upper joint 113a, an upper channel 114a, a lower joint 115a and a lower channel 116a. The piston 12 a is also sleeved with a sealing ring 14 a, an O-ring 131 a and a wear ring 16 a. The structure and function of these components are the same as the corresponding components of the exhaustable hydraulic cylinder 1 and will not be described in detail.

在此實施例中，該其中一支可排氣的油壓缸1的缸體11的內徑大於該另一支可排氣的油壓缸1a的缸體11a的內徑，但前者的上腔室111的容積等於後者的下腔室112a的容積，此處所稱的容積是指用於容納液壓油的容積。因此，以連接管2連接該其中一可排氣的油壓缸1的上接頭113與該另一可排氣的油壓缸1a的下接頭115a，就構成兩活塞桿13、13a可同步伸縮的串聯式油壓同步系統(以下簡稱系統)。 In this embodiment, the inner diameter of the cylinder 11 of one of the exhaustible hydraulic cylinders 1 is larger than the inner diameter of the cylinder 11a of the other exhaustable hydraulic cylinder 1a, but the upper The volume of the chamber 111 is equal to the volume of the latter's lower chamber 112a, and the volume referred to herein refers to the volume for containing hydraulic oil. Therefore, connecting the upper joint 113 of one of the exhaustible hydraulic cylinders 1 and the lower joint 115a of the other exhaustable hydraulic cylinder 1a with the connecting pipe 2 constitutes the two piston rods 13 and 13a that can be telescopically synchronized Series hydraulic synchronization system (hereinafter referred to as the system).

在此系統中，如圖1所示，當一油壓回路(含油箱，圖中未示)對該其中一可排氣的油壓缸1的下接頭115進油時，來自該油壓回路的液壓油會經由下孔道116進入下腔室112，並推動活塞12從起點往終點向上移動。由於上腔室111是通過上孔道114、連接管2及該另一可排氣的油壓缸1a的下孔道116a而連通下腔室112a，因此，活塞12的上移會推擠上腔室111、連接管2及 下腔室112a中的液壓油，使得活塞12a也從起點往終點向上移動，並推擠上腔室111a中的液壓油(或其它介質)經上孔道114a從上接頭113a流出，從而達成兩活塞桿13及13a的同步上移。反之，當該油壓回路對該另一可排氣的油壓缸1a的上接頭113a進油時，如圖2所示，來自該油壓回路的液壓油會經由上孔道114a進入上腔室111 a，並推動活塞12a從終點往起點向下移動，活塞12a的下移會推擠下腔室112a、連接管2及上腔室111中的液壓油，使得活塞12也從終點往起點向下移動，從而達成兩活塞桿13及13a的同步下移。 In this system, as shown in FIG. 1, when a hydraulic circuit (including a fuel tank, not shown in the figure) feeds the lower joint 115 of one of the exhaustable hydraulic cylinders 1 from the hydraulic circuit The hydraulic oil will enter the lower chamber 112 through the lower hole 116 and push the piston 12 to move upward from the starting point to the ending point. Since the upper chamber 111 communicates with the lower chamber 112a through the upper bore 114, the connecting pipe 2 and the lower bore 116a of the other exhaustable hydraulic cylinder 1a, the upward movement of the piston 12 will push the upper chamber 111, connecting pipe 2 and The hydraulic oil in the lower chamber 112a causes the piston 12a to move upward from the starting point to the end point, and pushes the hydraulic oil (or other medium) in the upper chamber 111a to flow out from the upper joint 113a through the upper channel 114a, thereby achieving two pistons The levers 13 and 13a move up simultaneously. Conversely, when the hydraulic circuit feeds oil to the upper joint 113a of another exhaustable hydraulic cylinder 1a, as shown in FIG. 2, the hydraulic oil from the hydraulic circuit will enter the upper chamber through the upper port 114a 111a, and push the piston 12a to move downward from the end point to the starting point, the downward movement of the piston 12a will push the hydraulic oil in the lower chamber 112a, the connecting pipe 2 and the upper chamber 111, so that the piston 12 also moves from the end point to the starting point Move down to achieve the simultaneous downward movement of the two piston rods 13 and 13a.

在前段的說明中，缸體11、11a及連接管2內已充滿了液壓油，茲再說明液壓油是如何充填至空的兩缸體11及11a。如圖1所示，連接管2連接空的缸體11及11a，且上接頭113a與下接頭115分別連接到上述的油壓回路，此時缸體11、11a及連接管2內都有空氣。首先，油壓回路經由上接頭113a將液壓油輸入缸體11a的上腔室111 a，以使液壓油充滿上腔室111 a，並經由活塞12a與缸體11a的內壁面之間的間隙(位於密封環14 a的上方)，流到排出孔15a，再經由排出孔15a、連接管2而流入缸體11的上腔室111。在此過程中，部分液壓油也會經由下孔道116a而流入缸體11a的下腔室112a內。 In the previous description, the cylinders 11 and 11a and the connecting pipe 2 are already filled with hydraulic oil. Here is how to fill the empty two cylinders 11 and 11a with hydraulic oil. As shown in FIG. 1, the connecting pipe 2 connects the empty cylinders 11 and 11a, and the upper joint 113a and the lower joint 115 are respectively connected to the above-mentioned hydraulic circuit. At this time, there is air in the cylinders 11, 11a and the connecting pipe 2 . First, the hydraulic circuit feeds hydraulic oil into the upper chamber 111 a of the cylinder 11 a via the upper joint 113 a to fill the upper chamber 111 a with hydraulic oil, and through the gap between the piston 12 a and the inner wall surface of the cylinder 11 a ( (Located above the seal ring 14a), flows to the discharge hole 15a, and then flows into the upper chamber 111 of the cylinder 11 via the discharge hole 15a and the connection pipe 2. During this process, part of the hydraulic oil will also flow into the lower chamber 112a of the cylinder 11a through the lower bore 116a.

隨著液壓油的繼續輸入，液壓油會充滿上腔室111，並經由活塞12與缸體11的內壁面110之間的間隙(位於密封環14的上方)，流到排出孔15，再經由排出孔15及下接頭115而流入液壓回路，然後回流到油箱內。在此過程中，部分液壓油會經由下孔道116而流入缸體11的下腔室112內。在液壓油輸入一段時間之後，缸體11a的上、下腔室111a與112a，以及缸體11的上、下腔室111與112，就都會充滿液壓油而能進行上述活塞桿13及13a的昇降操作。 As the hydraulic oil continues to be input, the hydraulic oil will fill the upper chamber 111 and flow to the discharge hole 15 through the gap between the piston 12 and the inner wall surface 110 of the cylinder 11 (located above the seal ring 14), and then through The discharge hole 15 and the lower joint 115 flow into the hydraulic circuit, and then return to the tank. During this process, part of the hydraulic oil will flow into the lower chamber 112 of the cylinder 11 through the lower bore 116. After the hydraulic oil is input for a period of time, the upper and lower chambers 111a and 112a of the cylinder 11a and the upper and lower chambers 111 and 112 of the cylinder 11 will be filled with hydraulic oil to perform the above-mentioned piston rods 13 and 13a Lifting operation.

在上述液壓油的輸入過程中，原本存在於上腔室111 a的空氣會被從上接頭113a進來的液壓油往下推擠，並經由活 塞12a與缸體11a的內壁面之間的間隙，流到排出孔15a，再經由排出孔15a、連接管2而流入缸體11的上腔室111。而上腔室111內的空氣則經由活塞12與缸體11的內壁面110之間的間隙，流到排出孔15，再經由排出孔15及下接頭115而流入液壓回路，然後流進油箱，再由油箱的一排氣機制排出到外面。其中，油箱的排氣機制已屬習知技術，例如：台灣公開第200609176號專利揭露一油箱具有一通氣閥，通氣閥可將油箱中的空氣排出油箱；台灣公告M431812號專利揭露油壓動力系統中的一油箱具有一空氣排氣孔；中國CN107934784A專利揭露一油箱可通過手動排氣桿進行排氣洩壓；中國CN105805060B專利揭露一液壓油箱具有一排氣口；中國CN107781235A專利揭露一油箱具有一自動排氣閥；中國CN106640785A專利揭露一種液壓安全油箱，具有一排氣裝置排氣箱、排氣柱及排氣口，使得該油箱能夠快速排氣。 During the input of the above-mentioned hydraulic oil, the air originally present in the upper chamber 111 a will be pushed down by the hydraulic oil coming in from the upper joint 113 a and pass through the The gap between the plug 12a and the inner wall surface of the cylinder 11a flows into the discharge hole 15a, and then flows into the upper chamber 111 of the cylinder 11 through the discharge hole 15a and the connection pipe 2. The air in the upper chamber 111 flows into the discharge hole 15 through the gap between the piston 12 and the inner wall surface 110 of the cylinder 11, and then flows into the hydraulic circuit through the discharge hole 15 and the lower joint 115, and then flows into the oil tank. It is discharged to the outside by an exhaust mechanism of the fuel tank. Among them, the exhaust mechanism of the fuel tank is already a conventional technology, for example: Taiwan Publication No. 200609176 discloses that a fuel tank has a vent valve, and the vent valve can expel the air from the fuel tank out of the fuel tank; Taiwan Announcement M431812 patent discloses the hydraulic power system One of the fuel tanks has an air vent; the Chinese CN107934784A patent discloses that a fuel tank can be exhausted for pressure relief through a manual exhaust rod; the Chinese CN105805060B patent discloses a hydraulic oil tank with an exhaust port; the Chinese CN107781235A patent discloses a fuel tank with a Automatic exhaust valve; Chinese patent CN106640785A discloses a hydraulic safety oil tank, with an exhaust device exhaust box, exhaust column and exhaust port, so that the fuel tank can quickly exhaust.

需指出的是，在此實施例中，雖然活塞12及12a上分別套有耐磨環16及16a，然如上述，耐磨環16及16a沒有像密封環14及14a那樣形成密封，故受推擠的液壓油及空氣仍能流經耐磨環16與缸體11之間的間隙，也能流經耐磨環16a與缸體11a之間的間隙。 It should be pointed out that in this embodiment, although the wear rings 16 and 16a are sleeved on the pistons 12 and 12a, however, as mentioned above, the wear rings 16 and 16a do not form a seal like the seal rings 14 and 14a, so The pushed hydraulic oil and air can still flow through the gap between the wear ring 16 and the cylinder 11 and also through the gap between the wear ring 16a and the cylinder 11a.

從上述的說明可知，藉由上述排出孔15及15a的設置，原本存在於缸體11、11a及連接管2內的空氣，會在上述液壓油充填於缸體11、11a的過程中被排出缸體11、11a之外。如此，系統內就不會有空氣，可確保系統在運作上的同步性及增加使用壽命。 As can be seen from the above description, through the installation of the discharge holes 15 and 15a, the air originally present in the cylinders 11 and 11a and the connecting pipe 2 is discharged during the process of filling the cylinders 11 and 11a with the hydraulic oil Outside the cylinders 11, 11a. In this way, there will be no air in the system, which can ensure the synchronization of the operation of the system and increase the service life.

在上述液壓油充填過程中，或有可能發生少許空氣跑進缸體11a的下腔室112a及/或缸體11的下腔室112的情形，就算如此，只要再進行一或數次活塞桿13及13a的昇降操作，這一點點空氣就會全被趕到油箱內，再由油箱的排氣機制排出到外面。舉例來說，活塞桿13及13a可先藉由液壓油從接頭115進油而一起上移，然後可藉由液壓油從接頭113a進油而一起下移。在下移過程 中，位在下腔室112內的空氣會因為活塞12的下移而被推入液壓回路，然後進入油箱，再由油箱的排氣機制排到外面。而位在下腔室112a內的空氣則會因為活塞12a的下移而經由連接管2進入上腔室111，在活塞12、12a下移到如圖1所示的位置時，只要繼續從接頭113a輸入液壓油，上腔室111內的空氣就會經由活塞12與缸體11的內壁面110之間的間隙，流到排出孔15，再經由排出孔15及下接頭115而流入液壓回路，然後流進油箱，再由油箱的排氣機制排出到外面。 During the above hydraulic oil filling process, there may be a case where a little air runs into the lower chamber 112a of the cylinder 11a and/or the lower chamber 112 of the cylinder 11, even if only one or more piston rods are required 13 and 13a lifting operation, this little air will be rushed to the fuel tank, and then discharged to the outside by the exhaust mechanism of the fuel tank. For example, the piston rods 13 and 13a can be moved up together by hydraulic oil from the joint 115, and then can be moved down together by hydraulic oil from the joint 113a. Moving down In the middle, the air in the lower chamber 112 will be pushed into the hydraulic circuit due to the downward movement of the piston 12, and then enter the oil tank, and then be discharged to the outside by the exhaust mechanism of the oil tank. The air in the lower chamber 112a will enter the upper chamber 111 through the connecting pipe 2 due to the downward movement of the piston 12a. When the pistons 12 and 12a move downward to the position shown in FIG. 1, as long as they continue from the joint 113a When hydraulic oil is input, the air in the upper chamber 111 will flow to the discharge hole 15 through the gap between the piston 12 and the inner wall surface 110 of the cylinder 11, and then flow into the hydraulic circuit through the discharge hole 15 and the lower joint 115. It flows into the fuel tank and is discharged to the outside by the exhaust mechanism of the fuel tank.

在此實施例中，如圖3所示，該另一可排氣的油壓缸11a的排出孔15a具有通往缸體11a內部且內徑較小的一小徑段151a，及通往下接頭115 a且內徑較大的一大徑段152a，但也可以整個排出孔15a的內徑都一樣。該其中一可排氣的油壓缸1亦然，容不贅述。其中，小徑段151a的一端位於缸體11a的內壁面，大徑段152a的一端位於缸體11a的外壁面，小徑段151a的另一端與大徑段152a的另一端相通，且小徑段151a的內徑小於大徑段152a。 In this embodiment, as shown in FIG. 3, the discharge hole 15a of the other exhaustable hydraulic cylinder 11a has a small diameter section 151a that leads to the inside of the cylinder 11a and has a small inner diameter, and leads to the lower The large diameter section 152a of the joint 115a and the larger inner diameter, but the inner diameter of the entire discharge hole 15a may be the same. The same can be said of one of the hydraulic cylinders 1 which can be exhausted. Wherein, one end of the small-diameter section 151a is located on the inner wall surface of the cylinder 11a, one end of the large-diameter section 152a is located on the outer wall surface of the cylinder 11a, the other end of the small-diameter section 151a communicates with the other end of the large-diameter section 152a, and the small diameter The inner diameter of the segment 151a is smaller than the large-diameter segment 152a.

較佳地，該另一可排氣的油壓缸11a的下孔道116a的內徑大於排出孔15a，且等於上孔道114a的內徑，但下孔道116a的內徑也可以等於或小於排出孔15a。該其中一可排氣的油壓缸1亦然，不再贅述。 Preferably, the inner diameter of the lower hole 116a of the other exhaustable hydraulic cylinder 11a is larger than the discharge hole 15a and equal to the inner diameter of the upper hole 114a, but the inner diameter of the lower hole 116a may also be equal to or smaller than the discharge hole 15a. The same is true for one of the exhaustable hydraulic cylinders 1 and will not be repeated here.

綜上所述可知，本發明之可排氣的油壓缸，可藉由排出孔的設置解決習知串聯式同步油壓缸系統內的殘留空氣問題，確保由本發明之可排氣的油壓缸所構成的串聯式同步油壓缸系統在運作上的同步性及增加使用壽命。 To sum up, it can be seen that the exhaustable hydraulic cylinder of the present invention can solve the problem of residual air in the conventional series synchronous hydraulic cylinder system through the arrangement of the discharge hole to ensure the exhaustable hydraulic pressure of the present invention The tandem synchronous hydraulic cylinder system composed of cylinders is synchronic in operation and increases service life.

1、1a:油壓缸 1. 1a: hydraulic cylinder

11、11a:缸體 11, 11a: cylinder

111、111a:上腔室 111, 111a: upper chamber

112、112a:下腔室 112, 112a: lower chamber

113、113a:上接頭 113, 113a: upper connector

114、114a:上孔道 114, 114a: Upper hole

115、115a:下接頭 115, 115a: lower connector

116、116a:下孔道 116, 116a: Lower hole

12、12a:活塞 12, 12a: Piston

13、13a:活塞桿 13, 13a: Piston rod

14、14a:密封環 14, 14a: sealing ring

15、15a:排出孔 15, 15a: discharge hole

16、16a:耐磨環 16, 16a: wear ring

131、131a:O型環 131, 131a: O-ring

2:連接管 2: connecting pipe

Claims (5)

一種可排氣的油壓缸，包括：一缸體，具有一內壁面、一外壁面、均由該內壁面所界定的一上腔室與一下腔室、以及均從該內壁面貫穿到該外壁面的一上孔道與一下孔道，該上孔道連通該上腔室，該下孔道連通該下腔室；一活塞，可移動地設於該缸體內，且能在該缸體內的一起點與一終點之間往返移動；一活塞桿，連接該活塞；一密封環，套於該活塞上，且具有一外周壁緊貼於該缸體的該內壁面而形成密封，藉以隔離該上、下腔室；一上接頭，設於該缸體的該外壁面，且直接連通該缸體的該上孔道；一下接頭，設於該缸體的該外壁面，且直接連通該缸體的該下孔道，其中，該下孔道的內徑等於該上孔道的內徑；一排出孔，從該缸體的該內壁面貫穿到該缸體的該外壁面，且直接連通該下接頭，及位於該下孔道的上方，其中，當該活塞位於該起點而使該密封環位於該排出孔下方時，該排出孔連通該上腔室，當該活塞往該終點移動到使該密封環位於該排出孔上方時，該排出孔連通下腔室，其中，該排出孔的內徑小於該下孔道，且具有一端位於該缸體的該內壁面的一小徑段及一端位於該缸體的 該外壁面的一大徑段，該小徑段的另一端與該大徑段的另一端相通，且該小徑段的內徑小於該大徑段。 An exhaustable hydraulic cylinder, including: a cylinder body having an inner wall surface, an outer wall surface, an upper chamber and a lower chamber all defined by the inner wall surface, and all penetrating from the inner wall surface to the An upper hole and a lower hole on the outer wall surface, the upper hole communicates with the upper chamber, and the lower hole communicates with the lower chamber; a piston is movably disposed in the cylinder body, and can A reciprocating movement between an end point; a piston rod connected to the piston; a sealing ring sleeved on the piston and having an outer peripheral wall clinging to the inner wall surface of the cylinder body to form a seal to isolate the upper and lower A chamber; an upper joint is provided on the outer wall surface of the cylinder and directly communicates with the upper bore of the cylinder; a lower joint is provided on the outer wall surface of the cylinder and directly communicates with the lower of the cylinder A hole, wherein the inner diameter of the lower hole is equal to the inner diameter of the upper hole; a discharge hole penetrates from the inner wall surface of the cylinder to the outer wall surface of the cylinder, and directly communicates with the lower joint and is located at the Above the lower bore, where, when the piston is at the starting point and the sealing ring is below the discharge hole, the discharge hole communicates with the upper chamber, and when the piston moves toward the end point so that the sealing ring is located at the discharge hole When upward, the discharge hole communicates with the lower chamber, wherein the inner diameter of the discharge hole is smaller than the lower hole, and has a small diameter section with one end on the inner wall surface of the cylinder and one end on the cylinder In the large diameter section of the outer wall surface, the other end of the small diameter section communicates with the other end of the large diameter section, and the inner diameter of the small diameter section is smaller than the large diameter section. 如請求項1所述的可排氣的油壓缸，包括一O型環，該O型環套於該活塞上，且夾於該活塞與該密封環之間。 The exhaustable hydraulic cylinder according to claim 1, comprising an O-ring, the O-ring is sleeved on the piston and sandwiched between the piston and the sealing ring. 如請求項1所述的可排氣的油壓缸，包括套於該活塞上且位於該密封環上方的一耐磨環，該耐磨環的一外周壁抵靠於該缸體的一內周壁。 The exhaustable hydraulic cylinder according to claim 1, comprising a wear ring sleeved on the piston and located above the sealing ring, an outer peripheral wall of the wear ring abuts against an inside of the cylinder body Zhou Bi. 一種串聯式同步油壓缸系統，包括一連接管及兩支如請求項1至3任一項所述的可排氣的油壓缸，該連接管的兩端分別連接其中一可排氣的油壓缸的該上接頭及另一可排氣的油壓缸的該下接頭，且該其中一可排氣的油壓缸的該上腔室用於容納液壓油的容積等於該另一可排氣的油壓缸的該下腔室用於容納該液壓油的容積。 A tandem synchronous hydraulic cylinder system, including a connecting pipe and two exhaustable hydraulic cylinders according to any one of claims 1 to 3, one end of the connecting pipe is connected to one of the exhaustable oils The upper joint of the pressure cylinder and the lower joint of another exhaustable hydraulic cylinder, and the volume of the upper chamber of one of the exhaustable hydraulic cylinders for containing hydraulic oil is equal to that of the other exhaustable The lower chamber of the pneumatic cylinder is used to contain the volume of the hydraulic oil. 如請求項4所述的串聯式同步油壓缸系統，其中該其中一可排氣的油壓缸的該缸體的內徑大於該另一可排氣的油壓缸的該缸體的內徑。The tandem synchronous hydraulic cylinder system according to claim 4, wherein the inner diameter of the cylinder of one of the exhaustible hydraulic cylinders is larger than that of the cylinder of the other exhaustable hydraulic cylinder path.
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