TWI702343B - Universal hydraulic cylinder - Google Patents

Universal hydraulic cylinder Download PDF

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Publication number
TWI702343B
TWI702343B TW108113104A TW108113104A TWI702343B TW I702343 B TWI702343 B TW I702343B TW 108113104 A TW108113104 A TW 108113104A TW 108113104 A TW108113104 A TW 108113104A TW I702343 B TWI702343 B TW I702343B
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Prior art keywords
movable support
hole
base
ring wall
head
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TW108113104A
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Chinese (zh)
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TW202040013A (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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Priority to TW108113104A priority Critical patent/TWI702343B/en
Priority to CN201910378868.8A priority patent/CN111828428B/en
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Publication of TW202040013A publication Critical patent/TW202040013A/en

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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
    • 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

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

The invention discloses a universal hydraulic cylinder, comprising a piston stem and a movable supporting portion disposed on the piston stem. The piston stem having a concave curved surface, the movable supporting portion having a convex curved surface that closely contacts the concave curved surface of the piston stem, so that the movable support portion can perform small rotation or swing in the multi-directional direction on the piston stem.

Description

萬向油壓缸Universal hydraulic cylinder

本發明係關於一種油壓缸，尤指一種萬向油壓缸。 The present invention relates to a hydraulic cylinder, especially a universal hydraulic cylinder.

圖7所示之習知油壓升降裝置1包括缸體11、活塞桿12、及活塞13。在一上昇行程中，一液壓回路(圖中未示)啟動進油運作，驅使油液經由接頭14流入缸體11內，並因此推動活塞13從一原位上昇，同時帶動活塞桿12上昇，以使活塞桿12所支撐的物體O向上移動。而在一下降行程中，液壓回路停止進油運作，此時，藉由物體O的重量將活塞桿12往下推動，活塞13下方的油液則經接頭14回流至液壓回路，直到活塞13移回原位。 The conventional hydraulic lifting device 1 shown in FIG. 7 includes a cylinder 11, a piston rod 12, and a piston 13. During an ascending stroke, a hydraulic circuit (not shown in the figure) starts the oil intake operation, which drives the oil into the cylinder 11 through the joint 14, thereby pushing the piston 13 up from an original position and at the same time driving the piston rod 12 up. This allows the object O supported by the piston rod 12 to move upward. During a descending stroke, the hydraulic circuit stops the oil intake operation. At this time, the piston rod 12 is pushed down by the weight of the object O, and the oil under the piston 13 flows back to the hydraulic circuit through the joint 14 until the piston 13 moves. Back to the original position.

然而，由於活塞桿12與缸蓋15的軸孔151並非完全緊密，活塞13的周壁也非全面性地緊貼於缸體11的內壁，當活塞桿12的頂端121剛好頂到物體O的重心或重心的附近時，活塞桿12的昇降尚能保持直上直下而不偏倚，然而，一旦活塞桿12的頂端121未頂到物體O的位置點是偏離重心時，就難以確保活塞桿12是筆直地昇降，甚至偏離量大且物體O重量重時，將導致活塞桿12出現歪斜現象，圖8顯示活塞桿12歪斜時在缸蓋15處的局部放大圖，圖9顯示活塞桿12歪斜時在活塞13處的局部放大圖，從圖2及3的觀察可知，歪斜的活塞桿12一方面影響昇降的順暢性，另一方面會加速磨耗缸蓋15的軸孔151，金屬製的活塞13也會刮傷缸體11內壁並造成噪音。 However, because the piston rod 12 and the shaft hole 151 of the cylinder head 15 are not completely tight, the peripheral wall of the piston 13 is also imperfectly attached to the inner wall of the cylinder 11, when the top end 121 of the piston rod 12 just hits the object O When the center of gravity or the vicinity of the center of gravity, the lift of the piston rod 12 can still maintain straight up and down without bias. However, once the top 121 of the piston rod 12 does not hit the object O and the position is off the center of gravity, it is difficult to ensure that the piston rod 12 is Lifting straight, even when the deviation is large and the weight of the object O is heavy, it will cause the piston rod 12 to skew. Figure 8 shows a partial enlarged view of the cylinder head 15 when the piston rod 12 is skewed, and Figure 9 shows when the piston rod 12 is skewed In the partial enlarged view of the piston 13, it can be seen from the observation of Figs. 2 and 3 that the skewed piston rod 12 affects the smoothness of lifting on the one hand, on the other hand, it accelerates the wear of the shaft hole 151 of the cylinder head 15, and the metal piston 13 It will also scratch the inner wall of the cylinder 11 and cause noise.

鑒於上述問題，本發明提供一種萬向油壓缸，其包括：一缸體，其底面具有向下凸的一弧形凸部；一活塞，可上、下移動地設於該缸體內；一活塞桿，具有連接該活塞的一底段及伸出該缸體外的一頂段，該頂段具有一頂面，該頂面係為向下凹的一凹弧面，該凹弧面的一中心位置有一固定孔；一活動支撐部，具有一基底及一環牆，該基底具有一頂面、一底面及緃向貫穿的一貫穿孔，該底面係為向下凸的一凸弧面，該凸弧面吻合地接觸該活塞桿的該凹弧面，該貫穿孔位於該基底的一中心位置且正對於該活塞桿的該固定孔，該環牆由該基底的該頂面向上延伸，且環繞該基底的該貫穿孔；一固定件，具有一頭部及從該頭部向下延伸的一身部，該身部穿過該活動支撐部的該貫穿孔之後固定於該活塞桿的該固定孔內，該頭部位於該活動支撐部的該環牆內且低於該環牆，並能限制該活動支撐部脫離該身部，其中，該身部與該活動支撐部的該貫穿孔之間有一間隙，該頭部與該活動支撐部的該環牆之間有一間隙，該頭部與該活動支撐部的該基底的該頂面之間有一間隙。 In view of the above-mentioned problems, the present invention provides a universal hydraulic cylinder, which includes: a cylinder body with a downwardly convex arc-shaped protrusion on the bottom surface; a piston arranged in the cylinder body to move up and down; The piston rod has a bottom section connected to the piston and a top section extending out of the cylinder body. The top section has a top surface. The top surface is a concave arc surface that is concave downward. A fixed hole is located at a central position; a movable support portion has a base and a ring wall, the base has a top surface, a bottom surface and a through hole penetrating in the general direction, and the bottom surface is a convex arc surface protruding downward. The convex arc surface is in agreement with the concave arc surface of the piston rod, the through hole is located at a central position of the base and is opposite to the fixing hole of the piston rod, the ring wall extends upward from the top surface of the base, and The through hole surrounding the base; a fixing member having a head and a body extending downward from the head, the body passing through the through hole of the movable support portion and then being fixed to the fixing of the piston rod In the hole, the head is located in the ring wall of the movable support part and is lower than the ring wall, and can restrict the movable support part from separating from the body, wherein the body and the through hole of the movable support part There is a gap therebetween, a gap between the head and the ring wall of the movable support part, and a gap between the head and the top surface of the base of the movable support part.

在一實施例中，本發明上述活動支撐部的該圍牆的一頂面具有一內平面及一外斜面，該內平面的寬度小於該外斜面。 In one embodiment, a top surface of the enclosure wall of the movable support portion of the present invention has an inner plane and an outer inclined plane, and the width of the inner plane is smaller than the outer inclined plane.

相對於先前技術，由於本發明上述活動支撐部能在該活塞桿上作多方向的小幅擺動，故可隨著所頂撐的物體的偏置而對應偏擺，使得該活塞桿則不受物體偏置的影響而仍可直上直下地順暢昇降移動，可解決先前技術上述昇降不順暢、磨耗、刮傷及噪音等問題。 Compared with the prior art, since the movable support part of the present invention can make small swings on the piston rod in multiple directions, it can deflect correspondingly with the bias of the supported object, so that the piston rod is not affected by the object. It can still move up and down smoothly under the influence of the offset, which can solve the problems of unsmooth lifting, abrasion, scratching and noise mentioned in the prior art.

11、21:缸體 11, 21: cylinder

210:弧形凸部 210: Arc convex

12、22:活塞桿 12, 22: Piston rod

221:底段 221: bottom section

222:頂段 222: top section

222a:頂面 222a: Top surface

222b:固定孔 222b: fixing hole

13、23:活塞 13, 23: Pistons

14:接頭 14: Connector

15:缸蓋 15: Cylinder head

151:軸孔 151: Shaft hole

25:活動支撐部 25: Activity support

251:基底 251: Base

251a:頂面 251a: Top surface

251b:底面 251b: bottom surface

251c:貫穿孔 251c: Through hole

252:環牆 252: Ring Wall

252a:內平面 252a: inner plane

252b:外斜面 252b: outer slope

26:固定件 26: fixed parts

261:頭部 261: head

262:身部 262: body

G1、G2、G3:間隙 G1, G2, G3: gap

圖1係本發明之一較佳實施例的部分立體分解圖。 Figure 1 is a partially exploded perspective view of a preferred embodiment of the present invention.

圖2係該較佳實施例的立體外觀圖。 Figure 2 is a perspective view of the preferred embodiment.

圖3係該較佳實施例的斷面圖。 Figure 3 is a cross-sectional view of the preferred embodiment.

圖4係該較佳實施例的局部放大斷面圖。 Figure 4 is a partial enlarged cross-sectional view of the preferred embodiment.

圖5及6係示意性地顯示該較佳實施例的活動支撐部25頂撐到一物體O的不同位置的情形。 FIGS. 5 and 6 schematically show how the movable supporting portion 25 of the preferred embodiment supports an object O at different positions.

圖7係習知油壓昇降裝置的斷面圖。 Figure 7 is a cross-sectional view of a conventional hydraulic lifting device.

圖8係該習知油壓昇降裝置的缸蓋處的局部放大斷面圖。 Figure 8 is a partial enlarged cross-sectional view of the cylinder head of the conventional hydraulic lifting device.

圖9係該習知油壓昇降裝置的活塞處的局部放大斷面圖。 Fig. 9 is a partial enlarged cross-sectional view of the piston of the conventional hydraulic lifting device.

圖1至4顯示本發明之萬向油壓缸的一個較佳實施例，其包括一缸體21、一活塞23、一活塞桿22、一活動支撐部25及一固定件26。缸體21的一底面具有向下凸的一弧形凸部210，活塞23可上、下移動地設於缸體21內。活塞桿22具有連接活塞23的一底段221及伸出缸體21外的一頂段222。頂段222具有一頂面222a。頂面222a係為向下凹的一凹弧面，該凹弧面可為一球面，但不以為限。頂面222a即該凹弧面的一中心位置有一固定孔222b。 1 to 4 show a preferred embodiment of the universal hydraulic cylinder of the present invention, which includes a cylinder body 21, a piston 23, a piston rod 22, a movable supporting portion 25 and a fixing member 26. A bottom surface of the cylinder body 21 has an arc-shaped convex portion 210 protruding downward, and the piston 23 is arranged in the cylinder body 21 to be movable up and down. The piston rod 22 has a bottom section 221 connected to the piston 23 and a top section 222 extending out of the cylinder 21. The top section 222 has a top surface 222a. The top surface 222a is a concave arc surface that is concave downward, and the concave arc surface may be a spherical surface, but is not limited. The top surface 222a, that is, a central position of the concave arc surface, has a fixing hole 222b.

活動支撐部25具有一基底251及一環牆252。基底251具有一頂面251a、一底面251b及緃向貫穿的一貫穿孔251c。底面251b係為向下凸的一凸弧面，該凸弧面即該底面251b吻合地接觸該活塞桿的該凹弧面即該頂面222a。貫穿孔251c位於基底251的一中心位置且正對於活塞桿22的固定孔222b。環牆252由基底251的頂面251a向上延伸，且環繞基底251的貫穿孔251c。 The movable supporting portion 25 has a base 251 and a ring wall 252. The base 251 has a top surface 251a, a bottom surface 251b, and a through hole 251c penetrating in a vertical direction. The bottom surface 251b is a convex arc surface that protrudes downward, and the convex arc surface, the bottom surface 251b, conformally contacts the concave arc surface of the piston rod, or the top surface 222a. The through hole 251 c is located at a central position of the base 251 and is opposite to the fixing hole 222 b of the piston rod 22. The ring wall 252 extends upward from the top surface 251 a of the base 251 and surrounds the through hole 251 c of the base 251.

在此實施例中，活動支撐部25的環牆252的一頂面具有一內平面252a及一外斜面252b，且內平面252a的寬度小於外斜面252b，如此，可降低活動支撐部25的環牆252與圖5中的一物體O之間的接觸面 In this embodiment, a top surface of the ring wall 252 of the movable support portion 25 has an inner flat surface 252a and an outer inclined surface 252b, and the width of the inner flat surface 252a is smaller than the outer inclined surface 252b, so that the ring of the movable support portion 25 can be reduced. The contact surface between the wall 252 and an object O in Figure 5

固定件26具有一頭部261及從頭部261向下延伸的一身部262。身部262穿過活動支撐部25的基底251上的貫穿孔 251c之後固定於活塞桿22的固定孔222b內。頭部261位於活動支撐部25的環牆252內且低於環牆252，並能限制活動支撐部25脫離身部262。在此實施例中，固定件26為一螺栓，固定孔222b為對應螺合該螺栓的一內螺紋孔，但不以此為限。如圖4所示，身部262與活動支撐部25的貫穿孔251c之間有一間隙G1，頭部261與活動支撐部25的環牆252之間有一間隙G2，頭部261與活動支撐部25的基底251的頂面251a之間有一間隙G3。 The fixing member 26 has a head 261 and a body 262 extending downward from the head 261. The body 262 passes through the through hole on the base 251 of the movable support 25 251c is then fixed in the fixing hole 222b of the piston rod 22. The head 261 is located in the ring wall 252 of the movable support part 25 and is lower than the ring wall 252, and can restrict the movable support part 25 from being separated from the body 262. In this embodiment, the fixing member 26 is a bolt, and the fixing hole 222b is an internal threaded hole corresponding to the bolt, but it is not limited to this. As shown in Figure 4, there is a gap G1 between the body 262 and the through hole 251c of the movable support 25, a gap G2 between the head 261 and the ring wall 252 of the movable support 25, and the head 261 and the movable support 25 There is a gap G3 between the top surface 251a of the base 251.

由於活動支撐部25的底面251b即凸弧面係吻合地接觸活塞桿22的頂面222a即凹弧面，且活動支撐部25與固定件26之間保持有上述間隙G1、G2及G3，因此，活動支撐部25能轉動，且能在活塞桿22的頂面222a即凹弧面上作多方向的小幅擺動，例如左右小幅擺動、前後小幅擺動，從而具有類似萬向接頭的功能而可作多自自由度的小幅轉動或擺動。 Since the bottom surface 251b, that is, the convex arc surface, of the movable support portion 25 is in consistent contact with the top surface 222a, that is, the concave arc surface of the piston rod 22, and the gaps G1, G2, and G3 are maintained between the movable support portion 25 and the fixed member 26, , The movable support portion 25 can rotate, and can make small swings in multiple directions on the top surface 222a of the piston rod 22, that is, on the concave arc surface, such as small swings left and right, and back and forth, so as to have a function similar to a universal joint. Small rotation or swing with multiple degrees of freedom.

圖5及6係示意性地顯示活動支撐部25頂撐到物體O的不同位置的情形，由於都沒有頂到物體O的重心位置，故活動支撐部25會往物體O較重的一側偏擺，圖5顯示活動支撐部25向左偏擺，圖5顯示活動支撐部25向右偏擺，然而，無論活動支撐部25往哪個方向偏擺，活塞桿22都不會跟著偏斜，故可確保活塞桿22在推昇或降下物體O的過程中都大致是直上直下的，故昇降順暢，可解決先前技術上述昇降不順暢、磨耗、刮傷及噪音等問題。 Figures 5 and 6 schematically show the situation where the movable support 25 is supported to different positions of the object O. Since none of the movable support 25 is pushed to the center of gravity of the object O, the movable support 25 will be biased toward the heavier side of the object O Fig. 5 shows the movable support part 25 yaws to the left, and Fig. 5 shows the movable support part 25 yaws to the right. However, no matter which direction the movable support part 25 sways, the piston rod 22 will not follow the deflection, so It can be ensured that the piston rod 22 is almost straight up and down during the process of pushing up or down the object O, so the lifting is smooth, which can solve the problems of unsmooth lifting, abrasion, scratching and noise in the prior art.

21:缸體 21: Cylinder

222:頂段 222: top section

222a:頂面 222a: Top surface

222b:固定孔 222b: fixing hole

25:活動支撐部 25: Activity support

251:基底 251: Base

251a:頂面 251a: Top surface

251b:底面 251b: bottom surface

251c:貫穿孔 251c: Through hole

252:環牆 252: Ring Wall

252a:內平面 252a: inner plane

252b:外斜面 252b: outer slope

26:固定件 26: fixed parts

261:頭部 261: head

262:身部 262: body

Claims (2)

一種萬向油壓缸，包括：一缸體，其底面具有向下凸的一弧形凸部；一活塞，可上、下移動地設於該缸體內；一活塞桿，具有連接該活塞的一底段及伸出該缸體外的一頂段，該頂段具有一頂面，該頂面係為向下凹的一凹弧面，該凹弧面的一中心位置有一固定孔；一活動支撐部，具有一基底及一環牆，該基底具有一頂面、一底面及緃向貫穿的一貫穿孔，該底面係為向下凸的一凸弧面，該凸弧面吻合地接觸該活塞桿的該凹弧面，該貫穿孔位於該基底的一中心位置且正對於該活塞桿的該固定孔，該環牆由該基底的該頂面向上延伸，且環繞該基底的該貫穿孔；一固定件，具有一頭部及從該頭部向下延伸的一身部，該身部穿過該活動支撐部的該貫穿孔之後固定於該活塞桿的該固定孔內，該頭部位於該活動支撐部的該環牆內且低於該環牆，並能限制該活動支撐部脫離該身部，其中，該身部與該活動支撐部的該貫穿孔之間有一間隙，該頭部與該活動支撐部的該環牆之間有一間隙，該頭部與該活動支撐部的該基底的該頂面之間有一間隙。 A universal hydraulic cylinder includes: a cylinder body with a downwardly convex arc-shaped convex part on the bottom surface; a piston arranged in the cylinder body so as to move up and down; a piston rod having a connecting rod A bottom section and a top section protruding from the cylinder body, the top section has a top surface, the top surface is a concave arc surface that is concave downward, and a fixing hole is provided at a center of the concave arc surface; The movable support part has a base and a ring wall, the base has a top surface, a bottom surface and a through hole penetrating in the general direction, the bottom surface is a convex arc surface that protrudes downward, and the convex arc surface conforms to contact the piston The concave arc surface of the rod, the through hole is located at a central position of the base and is opposite to the fixing hole of the piston rod, and the ring wall extends upward from the top surface of the base and surrounds the through hole of the base; A fixing member having a head and a body extending downward from the head, the body passing through the through hole of the movable support portion and then being fixed in the fixing hole of the piston rod, and the head is located at the The movable support part is inside the ring wall and is lower than the ring wall, and can restrict the movable support part from separating from the body, wherein there is a gap between the body and the through hole of the movable support part, and the head and There is a gap between the ring wall of the movable supporting part, and a gap between the head and the top surface of the base of the movable supporting part. 如請求項1所述的萬向油壓缸，其中該活動支撐部的該環牆的一頂面具有一內平面及一外斜面，該內平面的寬度小於該外斜面。 The universal hydraulic cylinder according to claim 1, wherein a top surface of the ring wall of the movable support portion has an inner plane and an outer inclined plane, and the width of the inner plane is smaller than the outer inclined plane.
TW108113104A 2019-04-15 2019-04-15 Universal hydraulic cylinder TWI702343B (en)

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Application Number Priority Date Filing Date Title
TW108113104A TWI702343B (en) 2019-04-15 2019-04-15 Universal hydraulic cylinder
CN201910378868.8A CN111828428B (en) 2019-04-15 2019-05-08 Universal oil hydraulic cylinder

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Application Number Priority Date Filing Date Title
TW108113104A TWI702343B (en) 2019-04-15 2019-04-15 Universal hydraulic cylinder

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Citations (4)

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TW347447B (en) * 1997-01-31 1998-12-11 Sugiyasu Kogyo Co Ltd Telescopic cylinder
TW466950U (en) * 2000-09-25 2001-12-01 Kuen-Shan Shiu Structure of hydraulic cylinder
CN101392775A (en) * 2007-09-17 2009-03-25 北京航天发射技术研究所 Two stage interference lock fastening hydraulic cylinder at optional position
CN203926554U (en) * 2014-04-29 2014-11-05 台州齐力减震器有限公司 A kind of multiplex vibration damper

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Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW347447B (en) * 1997-01-31 1998-12-11 Sugiyasu Kogyo Co Ltd Telescopic cylinder
TW466950U (en) * 2000-09-25 2001-12-01 Kuen-Shan Shiu Structure of hydraulic cylinder
CN101392775A (en) * 2007-09-17 2009-03-25 北京航天发射技术研究所 Two stage interference lock fastening hydraulic cylinder at optional position
CN203926554U (en) * 2014-04-29 2014-11-05 台州齐力减震器有限公司 A kind of multiplex vibration damper

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