TWI596287B - Damper - Google Patents

Description

Damper

The present invention relates to a damper, and more particularly to a damper suitable for installation on a building, furniture or vehicle and providing a cushioning force.

Referring to Figures 1, 2, and 3, the conventional damper 1 includes an outer tube unit 11 having a receiving space 110, a partitioning unit 12 partitioning the containing space 110 into a liquid chamber 111 and a gas chamber 112, and A piston unit 13 telescopically mounted on the outer tube unit 11. The piston unit 13 includes a piston 131 that divides the liquid chamber 111 into a first liquid containing section 113 and a second liquid containing section 114, a piston rod 132 coupled with the piston 131, and a movable The ring 133 on the piston 131 is fitted.

The piston 131 has a first gap 134 adjacent to the first liquid containing section 113, a second gap 135 adjacent to the second liquid containing section 114, a groove wall surface 137 defining a ring groove 136, and a communicating passage A gap 134 and a flow path 130 of the second liquid containing section 114. The groove wall surface 137 has an upright ring portion 138 parallel to the inner peripheral surface 115 of the outer tube unit 11, and a flat horizontally extending from the upright ring portion 138 toward the radially outer end. The face ring portion 139 is mounted in the ring groove 136.

When the piston unit 13 of the damper 1 is in a retracted position as shown in FIG. 2, the piston unit 13 will move in a retracting direction 14, at which time the liquid in the second liquid containing section 114 will Flowing toward the first liquid containing section 113, and topping the loop 133, and pressing the loop 133 upward and upward, while closing the opening of the bottom end of the first gap 134, the second volume The liquid in the liquid section 114 can only flow from the flow path 130 to the first gap 134 and then to the first liquid containing section 113, so the resistance is large. When the piston unit 13 moves along a protruding direction 15 as shown in FIG. 3, the liquid in the first liquid containing section 113 will flow toward the second liquid containing section 114, and the piston 131 will gradually gradually move up. The loop 133 is relatively moved downward, so that the liquid in the first liquid containing section 113 can flow to the second liquid containing section 114 via the flow passage 130 and the second gap 135, thereby achieving rapid protrusion but slowing down. The purpose of retraction.

Although the conventional damper 1 can achieve the foregoing purpose, when the piston unit 13 is to be moved in the protruding direction 15, the inner and outer sides of the ring 133 are sandwiched between the upright ring portions 138 and the outer tube disposed in parallel. Between the inner peripheral surfaces 115 of the unit 11, therefore, it takes a long time for the loop 133 to get rid of the clamped condition, and the resistance when escaping is relatively large. Therefore, the piston unit 13 of the conventional damper 1 is protruded. It is more laborious.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a damper which can reduce the resistance of a piston unit during projecting to achieve a labor-saving effect.

The damper of the present invention comprises an outer tube unit, and a a piston unit mounted on the outer tube unit, the outer tube unit including a tube wall defining a receiving space, and the piston unit includes a first liquid containing portion and a first portion in the receiving space a piston of the two-capacity section, a piston rod coupled to the piston, and a ring fitted to the piston. The piston has a ring groove for assembling the ring, a flow path for allowing liquid to flow between the first liquid containing section and the second liquid containing section, and a communicating passage between the annular groove and the first liquid containing section. a first gap, and a reclining annulus that presses the collar against the tube wall and closes the first gap when the piston unit is in a retracted position, when the piston unit is in a projecting position, The reclining of the piston will quickly stop the pressing of the ring, allowing the ring to be quickly reset.

The effect of the invention is that: when the piston unit is in the protruding position, the inclined toroid of the piston can move rapidly and stop the compression of the ring, so that the liquid in the first liquid portion can be The first gap and the flow passage are quickly entered into the second liquid containing section, thereby reducing the resistance of the piston unit during the protruding, and making the piston unit more labor-saving when protruding.

2‧‧‧External tube unit

21‧‧‧ wall

211‧‧‧ inner circumference

22‧‧‧Containing space

221‧‧‧Liquid room

222‧‧‧ gas chamber

223‧‧‧First liquid section

224‧‧‧Second liquid section

23‧‧‧End cover

3‧‧‧Separate unit

31‧‧‧ Frontier

32‧‧‧Float

33‧‧‧Spring seat

34‧‧‧Flexible components

4‧‧‧piston unit

40‧‧‧ flow path

401‧‧‧Small mouth

402‧‧‧ big mouth

41‧‧‧Piston

411‧‧‧ first end face

412‧‧‧First gap

413‧‧‧second end face

414‧‧‧3rd end face

415‧‧‧ slanted torus

416‧‧‧ Carrying wall

417‧‧‧ Ring groove

418‧‧‧Blinded

419‧‧‧Second gap

42‧‧‧ piston rod

43‧‧‧ ring

44‧‧‧ retracted direction

45‧‧‧ protruding direction

Other features and advantages of the present invention will be apparent from the following description of the drawings, wherein: Figure 1 is a cross-sectional view of a conventional damper; Figure 2 is a partial sectional view showing the conventional damper a case where the piston unit is in a retracted position; FIG. 3 is a view similar to FIG. 2, illustrating the condition of the piston unit of the damper in a protruding position; Figure 4 is a cross-sectional view showing a first preferred embodiment of the damper of the present invention; Figure 5 is a perspective view showing a piston of the first preferred embodiment; Figure 6 is a partial view of the first preferred embodiment A combination sectional view showing the state of the piston unit of one of the dampers in a retracted position; FIG. 7 is a view similar to FIG. 6 illustrating the state of the piston unit in a protruding position; FIG. 8 is the present invention. A combined cross-sectional view of a second preferred embodiment of the damper in which the piston unit of the damper is located in the retracted position; and FIG. 9 is a view similar to FIG. 8 in which the piston unit is located position.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to Figures 4, 5, 6, and 7, a first preferred embodiment of the damper of the present invention comprises: an outer tube unit 2, a partition unit 3 mounted inside the outer tube unit 2, and a piston unit 4 . The outer tube unit 2 includes a tube wall 21, a receiving space 22 defined by an inner peripheral surface 211 of the tube wall 21, and an end cap 23 closing the opening of the top end of the housing space 22. The partition unit 3 includes a side stopper 31 adjacent to the end cover 23, and a floating plug 32 spaced apart from the side plug 31. The floating plug 32 divides the receiving space 22 into a liquid liquid. Room 221, and a gas chamber 222 that can hold a gas.

The piston unit 4 of the present embodiment includes a piston 41 mounted in the liquid chamber 221 of the receiving space 22, a piston rod 42 having one end penetrating the receiving space 22 and coupled with the piston 41, and a set A loop 43 on the piston 41. The piston 41 also divides the liquid chamber 221 into a first liquid containing section 223 located above and a second liquid containing section 224 located below. The piston 41 has a first end surface 411 facing the first liquid receiving portion 223, a first gap 412 annular and perpendicular to the first end surface 411, a second end surface annularly spaced apart from the first end surface 411 413. A third end surface 414 adjacent to the first gap 412 and interposed between the first end surface 411 and the second end surface 413, and a slope connected between the third end surface 414 and the second end surface 413 a toroidal surface 415, a flow path 40 extending through the first end surface 411 and the second end surface 413, a bearing wall 416 adjacent to the second liquid receiving portion 224, and a third end surface 414 and the bearing The annular groove 417 between the walls 416 has two missing edges 418 on the opposite side, and the piston 41 also has a gap between the bearing wall 416 and the inner circumferential surface 211 of the tube wall 21. The second gap 419. The flow path 40 has a small mouth portion 401 adjacent to the first end surface 411, and a large mouth portion 402 adjacent to the second end surface 413, and the ring 43 is movably mounted in the annular groove 417 of the piston 41. .

When the damper of the embodiment is in the retracted position shown in FIG. 6, the piston unit 4 moves along a retracting direction 44. At this time, the third end surface 414 of the downwardly moving piston 41 and the reclining ring The surface 415 will be pressed against the ring 43 and the ring 43 is pressed against the inner circumferential surface 211 of the tube wall 21, and finally the opening at the bottom end of the first gap 412 is closed, so that in the retracted position, The liquid in the second liquid containing section 224 can only flow from the second gap 419 and the missing edge 418 of the piston 41 to the annular groove 417, and the annular groove 417 enters the first through the flow path 40. Liquid section 223. The liquid pushed upward also pushes the ring 43 and is pressed against the third end surface 414 of the piston 41 and the inclined toroid 415, so that the liquid passes through the piston 41 at a slower speed, which can be generated. Greater resistance.

When the damper of the present embodiment is in a projecting position shown in FIG. 7, the piston unit 4 will protrude in a projecting direction 45, and the piston 41 is moved up, and the piston 41 is moved up. In an instant, the ring 43 which is originally pressed against the inner circumferential surface 211 of the pipe wall 415 by the inclined toroidal surface 415 of the piston 41 is quickly reset by the momentary release of the pressing force, and is moved downward relative to the piston 41. In this way, the liquid located in the first liquid containing section 223 can enter the annular groove 417 through the flow channel 40, and then flows to the second liquid containing section by the missing edge 418 and the second gap 419 of the piston 41. 224, the first gap 412 is also opened instantaneously, so when the damper is in the protruding position, the liquid can pass through the piston 41 instantaneously and quickly to quickly reduce the resistance of the piston unit 4 when protruding. At the same time, it achieves a more labor-saving purpose when protruding.

Referring to Figures 8 and 9, a second preferred embodiment of the damper of the present invention is constructed similarly to the first preferred embodiment except that the partition unit 3 includes a float 32 adjacent one of the floats 32. The spring seat 33 has a spring member 34 that is supported between the spring seat 33 and the end cap 23 of the outer tube unit 2. When the piston unit 4 of the damper is in the retracted position shown in FIG. 8, since the liquid in the second liquid containing section 224 is pushed toward the first liquid containing section 223, the elasticity is compressed. Component 34 accumulates rebound Force. Conversely, when the piston unit 4 of the damper is in the protruding position of FIG. 9, the liquid in the first liquid containing section 223 can be squeezed out to the second liquid containing section 224, and is originally compressed. The elastic member 34 also releases the accumulated elastic force, assisting to press the liquid in the first liquid containing portion 223 toward the second liquid containing portion 224, so that the piston unit 4 can protrude more quickly to reach the protruding portion. Stretching a more labor-saving effect.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and patent specification content of the present invention, All remain within the scope of the invention patent.

2‧‧‧External tube unit

21‧‧‧ wall

211‧‧‧ inner circumference

22‧‧‧Containing space

221‧‧‧Liquid room

223‧‧‧First liquid section

224‧‧‧Second liquid section

4‧‧‧piston unit

40‧‧‧ flow path

401‧‧‧Small mouth

402‧‧‧ big mouth

41‧‧‧Piston

411‧‧‧ first end face

412‧‧‧First gap

413‧‧‧second end face

414‧‧‧3rd end face

415‧‧‧ slanted torus

416‧‧‧ Carrying wall

417‧‧‧ Ring groove

418‧‧‧Blinded

419‧‧‧Second gap

42‧‧‧ piston rod

43‧‧‧ ring

44‧‧‧ retracted direction

Claims (5)

A damper comprising: an outer tube unit including a tube wall, and a receiving space defined by an inner peripheral surface of the tube wall; and a piston unit including a compartment for distinguishing one in the housing space a piston of the first liquid containing section and a second liquid containing section, a piston rod coupled to the piston, and a ring fitted to the piston, the piston having a ring groove for assembling the ring a flow path for allowing liquid to flow between the first liquid containing section and the second liquid containing section, a first gap connecting the annular groove and the first liquid containing section, and a second adjacent liquid containing section a load bearing wall, a second gap between the load bearing wall and an inner circumferential surface of the pipe wall, and a pressing of the ring ring to the pipe wall and closing the piston unit when the piston unit is in a retracted position a gap of the abutment surface, the carrier wall has at least one missing edge; when the piston unit moves along a protruding direction, the inclined toroidal surface of the piston will quickly stop pressing the ring, so that The ring is quickly reset. The damper of claim 1, wherein the piston further has a first end surface facing the first liquid containing section, and a second end surface spaced from the first end surface and facing the annular groove, and the flow The passage penetrates the first end surface and the second end surface. The damper of claim 2, wherein the first gap of the piston is perpendicular to the first end surface and adjacent to an inner circumferential surface of the tube wall, and the piston further has a first gap adjacent to the first gap One end And a third end surface between the second end surface, the inclined toroidal surface being connected between the third end surface and the second end surface. The damper of claim 3, wherein the ring groove is between the carrier wall and the third end surface. The damper of claim 4, wherein the outer tube unit further comprises an end cap enclosing the receiving space, and the damper further comprises a device mounted in the receiving space and interposed between the piston and the end a partitioning unit between the cover, the partitioning unit partitioning the receiving space into a liquid chamber having the first liquid containing section and the second liquid containing section, and a gas chamber, and including a top support in the gas chamber Elastic components.