TWI568946B - Damping device - Google Patents

Description

Buffer device

The present invention relates to a cushioning device, and more particularly to a cushioning device for use in a furniture article.

In general, some specific furniture, such as doors or cabinets, are equipped with cushioning devices. The cushioning device can be used to provide a cushioning function for a first member relative to a second member from the opening to the closing end stroke to relieve the force of the first member when the second member is closed. A cushioning device for a piece of furniture includes a carriage (13), a piston (22) and a piston rod (17) as disclosed in U.S. Patent Publication No. US 9,021,656 B2. 4a, 4b of the case, one end of the piston rod (17) is connected to the piston (22), and the piston (22) is located in a chamber (21) of the sliding seat (13).

In particular, the piston rods are generally elongate rods from the related art of prior art cushioning devices, and the piston rods require an additional piston. That is to say, the prior art piston rod and piston are two separate members. When the material of the piston rod and the piston are different, for example, when the piston rod is metal and the piston is plastic, it is also necessary to pay attention to the fact that the piston may be subjected to strong pressure for a long time and there is a fear of damage. Therefore, if a different buffer device can be developed, it will certainly bring more choices to the market.

The present invention relates to a cushioning device having a piston rod having a specific structure.

According to one aspect of the invention, a cushioning device includes a cylinder, a cover assembly, a piston rod and an elastic member. The cylinder includes an inner wall defining a chamber, and an opening communicating with the chamber, the chamber being filled with a buffer fluid; the cover assembly being disposed adjacent to the opening of the cylinder; the piston rod movable relative to the cylinder The piston rod includes a rod portion, an extension portion, and an expansion portion between the rod portion and the extension portion, wherein the rod portion passes through the cover assembly, and the width of the expansion portion is greater than the width of the rod portion The elastic member is disposed in a chamber of the cylinder, and the elastic member is configured to provide an elastic force to the piston rod.

Preferably, the inner wall of the cylinder has a groove for passage of at least a portion of the buffer fluid.

Preferably, the expansion portion has a gap with the inner wall of the cylinder for at least a portion of the buffer fluid to pass therethrough.

Preferably, the buffering device further comprises a base mounted to the piston rod adjacent to the extension, the base being disposed in the chamber of the cylinder and abutting the elastic member.

Preferably, the piston rod further comprises a mounting portion protruding from the extending portion, the base being mounted to the mounting portion.

Preferably, the base has at least one aperture for passage of at least a portion of the buffer fluid.

Preferably, the buffering device further comprises a control valve movably mounted between the expansion portion of the piston rod and the base.

Preferably, the rod portion, the extension portion and the expansion portion of the piston rod are integrally formed.

Preferably, the width of the extension is greater than the width of the stem, and the width of the extension is smaller than the width of the expansion.

Preferably, the piston rod is made of a metal material.

Preferably, the cover assembly comprises a cover, a sleeve and a sealing ring, the cover has a space for receiving the sleeve, the rod of the piston rod passes through the sleeve, and the sealing ring is sleeved on the cover .

According to another aspect of the present invention, a cushioning device includes a cylinder block, a cover assembly, a piston rod, a base, a control valve, and an elastic member. The cylinder includes an inner wall defining a chamber, and an opening communicating with the chamber, the chamber being filled with a buffer fluid; the cover assembly being disposed adjacent to the opening of the cylinder; the piston rod movable relative to the cylinder The piston rod includes a rod portion, an extension portion, and an expansion portion between the rod portion and the extension portion, the rod portion, the extension portion and the expansion portion are integrally formed, wherein the rod portion protrudes The opening, the width of the expansion portion is greater than the width of the rod portion, and the expansion portion has a gap with the inner wall of the cylinder body for at least a portion of the buffer fluid to pass; the base is mounted to the piston rod Adjacent to the extension, and the base is located in the chamber of the cylinder; the control valve is movably mounted between the expansion portion of the piston rod and the base; the elastic member is disposed in the chamber of the cylinder , the elastic member is used Providing an elastic force to the piston rod; wherein, when the piston rod receives a force in a first direction, the elastic member accumulates an elastic force, and the control valve is in a position relative to the expansion portion of the piston rod to block the gap; When the force in the first direction is released, the piston rod is returned to the second direction by the elastic force of the elastic member, so that the control valve is away from the position without blocking the gap.

20‧‧‧buffering device

22‧‧‧Cylinder block

24‧‧‧Overlay components

26‧‧‧ piston rod

28‧‧‧Flexible parts

30‧‧‧Base

32‧‧‧Control valve

34‧‧‧ inner wall

36‧‧‧ chamber

38‧‧‧ openings

40‧‧‧ trench

42‧‧‧buffer fluid

44‧‧‧ cover

46‧‧‧ kit

48‧‧‧Seal ring

50‧‧‧ space

52‧‧‧ pole

54‧‧‧Extension

56‧‧‧Expansion Department

58‧‧‧Installation Department

60‧‧‧ gap

62‧‧‧ holes

64‧‧‧Circular opening

D1‧‧‧ first direction

D2‧‧‧ second direction

P‧‧‧ position

W1, W2, W3‧‧‧ width

1 is a schematic exploded view of a buffer device according to an embodiment of the present invention; FIG. 2 is a perspective view showing a cylinder of a buffer device according to an embodiment of the present invention; and FIG. 3 is a schematic view showing the assembly of a buffer device according to an embodiment of the present invention; A schematic view showing a piston rod of a buffer device according to an embodiment of the present invention receiving a force in a first direction; FIG. 5 is an enlarged view of a region A of FIG. 4 for showing that the control valve can block a gap at a position; 6 is a schematic view showing the piston rod of the embodiment in which the force is continuously applied to the buffer device in the first direction; FIG. 7 is a view showing the piston rod of the cushioning device according to an embodiment of the present invention responding to the elastic force of an elastic member. A schematic diagram of the displacement in the two directions; and FIG. 8 is a schematic view showing that the piston rod of the cushioning device of the embodiment of the present invention can return to an initial state with respect to the cylinder by returning the elastic force of the elastic member.

1 shows a cushioning device 20 according to an embodiment of the present invention comprising a cylinder 22, a cover assembly 24, a piston rod 26 and an elastic member 28. Preferably, the buffer device 20 further includes a base 30 and a control valve 32.

As shown in FIG. 2, the cylinder 22 includes an inner wall 34 defining a chamber. 36. An opening 38 communicates with the chamber 36. In this embodiment, the cylinder 22 is substantially cylindrical and the cylinder 22 has an annular inner wall 34. Preferably, the inner wall 34 of the cylinder 22 has a groove 40. The groove 40 is disposed along the longitudinal direction of the cylinder 22.

As shown in FIG. 3, the base 30 and the piston rod 26 are in an initial state with respect to the cylinder 22, and the chamber 36 of the cylinder 22 can be filled with a buffer fluid 42 (in FIG. 3, in plural). Black dots indicate the buffer fluid 42).

The cover assembly 24 is disposed adjacent the opening 38 of the cylinder 22. Preferably, the cover assembly 24 includes a cover 44, a sleeve 46 and a seal ring 48. The cover 44 has a space 50 for receiving the sleeve 46; the seal ring 48 is sleeved over the cover 44 for sealing the opening 38 of the cylinder 22.

The piston rod 26 is movable relative to the cylinder block 22, and the piston rod 26 includes a rod portion 52, an extension portion 54, and an expansion portion 56 between the rod portion 52 and the extension portion 54. Preferably, the piston rod 26 further includes a mounting portion 58 projecting from the extending portion 54. Here, the piston rod 26 can be made of a metal material. In addition, the rod portion 52, the extending portion 54, the expanding portion 56 and the mounting portion 58 of the piston rod 26 are integrally formed. Therefore, the piston rod 26 provided by the embodiment of the present invention can have better structural strength; wherein the expansion Portion 56 can be considered a piston. The width W1 of the expansion portion 56 is greater than the width W2 of the rod portion 52; the width W3 of the extension portion 54 is greater than the width W2 of the rod portion 52, and the width W3 of the extension portion 54 is smaller than the width W1 of the expansion portion 56. In short, the mathematical expression is W1>W3>W2. In addition, the stem portion 52 passes through the cover assembly 24, for example through The sleeve 46 and the cover 44 extend beyond the opening 38 of the cylinder 22. A gap 60 is formed between the flared portion 56 of the piston rod 26 and the inner wall 34 of the cylinder block 22.

The elastic member 28 is disposed in the chamber 36 of the cylinder block 22, and the elastic member 28 is configured to provide a spring force to the piston rod 26 so that a portion of the rod portion 52 of the piston rod 26 can remain extended in the cylinder block. The exterior of the opening 38 of 22.

The base 30 is mounted to the mounting portion 58 of the piston rod 26 adjacent to the extension portion 54. The base 30 is disposed in the chamber 36 of the cylinder 22 and abuts against the elastic member 28. Preferably, the base 30 has at least one aperture 62.

The control valve 32 is movably mounted between the flared portion 56 of the piston rod 26 and the base 30. Specifically, the expansion portion 56 of the piston rod 26 has a distance L1 from the base 30, and the control valve 32 has a dimension L2 smaller than the spacing L1, so that the control valve 32 can be in the expansion portion of the piston rod 26. 56 is active with the base 30. The control valve 32 is generally annular in configuration and is made of a flexible material, and the control valve 32 has an annular opening 64 through which the extension 54 of the piston rod 26 can pass. For example, the annular opening 64 has a larger diameter than the extension 54 of the piston rod 26 for the extension 54 to pass through.

As shown in FIG. 3 and FIG. 4, when a force is applied to the piston rod 26 in a first direction D1, the piston rod 26 is displaced in the first direction D1, so that the base 30 is pushed against the elastic member 28. The elastic member 28 is allowed to accumulate an elastic force, and a part of the buffer fluid 42 is pressed to flow in the direction of the opening 38.

Specifically, when a portion of the buffer fluid 42 is directed to the opening 38 A portion of the buffer fluid 42 may pass through at least one aperture 62 of the base 30, the annular opening 64 of the control valve 32, the groove 40, or the gap 60 as the direction of flow. With the groove 40 or the gap 60, a portion of the buffer fluid 42 can flow from one side of the flared portion 56 of the piston rod 26 to the other side of the flared portion 56 of the piston rod 26. In this embodiment, during the displacement of the piston rod 26 in the first direction D1, the control valve 32 can be at a position P relative to the expansion portion 56 of the piston rod 26 to block the gap 60 (this portion can be matched Figure 5). Therefore, in this state, a portion of the buffer fluid 42 is forced to flow from the groove 40 to the other side of the expansion portion 56 of the piston rod 26.

As shown in FIG. 4 and FIG. 6, when the force continues to be applied to the piston rod 26 in the first direction D1, the base 30 further pushes against the elastic member 28, so that the elastic member 28 accumulates the elastic force, and the elastic member 28 accumulates the elastic force. A portion of the buffer fluid 42 is squeezed to continue to flow from the groove 40 to the other side of the flared portion 56 of the piston rod 26.

As shown in FIG. 7 and FIG. 8 , when the force in the first direction D1 is released, the base 30 and the piston rod 26 can be displaced in the second direction D2 by the elastic force of the elastic member 28, wherein the The second direction D2 is opposite to the first direction D1. During the displacement of the base 30 and the piston rod 26 in the second direction D2, a portion of the buffer fluid 42 is squeezed such that a portion of the buffer fluid 42 will emerge from the flared portion 56 of the piston rod 26. The other side recirculates away from the opening 38. During the reflow process, a portion of the buffer fluid 42 may pass through the gap 60; or a portion of the buffer fluid 42 may pass through the gap Trench 40. The elastic force of the elastic member 28 is displaced by the base 30 to the second direction D2, so that the control valve 32 can be brought close to the base 30. Briefly, the control valve 32 is remote from the position P without blocking the gap 60; or, by a portion of the buffer fluid 42 being recirculated, the control valve 32 can be driven from a portion of the buffer fluid 42 from the position P toward The base 30 is displaced to be close to the base 30, in other words, the control valve 32 can also be moved away from the position P accordingly.

It can be seen that the piston rod 26 of the cushioning device 22 provided by the embodiment of the present invention is an integrally formed single member, wherein the expanded portion 56 of the piston rod 26 has a larger width than the rod portion 52; further, the cylinder 22 is provided with The groove 40 is for passage of the buffer fluid 42.

While the present invention has been disclosed in the foregoing preferred embodiments, it is not intended to limit the invention, and the scope of the invention is defined by the scope of the appended claims.

20‧‧‧buffering device

22‧‧‧Cylinder block

24‧‧‧Overlay components

26‧‧‧ piston rod

28‧‧‧Flexible parts

30‧‧‧Base

32‧‧‧Control valve

44‧‧‧ cover

46‧‧‧ kit

48‧‧‧Seal ring

50‧‧‧ space

52‧‧‧ pole

54‧‧‧Extension

56‧‧‧Expansion Department

58‧‧‧Installation Department

62‧‧‧ holes

64‧‧‧Circular opening

Claims (11)

A buffer device comprising: a cylinder comprising an inner wall defining a chamber, and an opening communicating with the chamber, the chamber being filled with a buffer fluid; a cover assembly disposed adjacent the opening of the cylinder; a piston rod Relating to the cylinder, the piston rod includes a rod portion, an extension portion, and an expansion portion between the rod portion and the extension portion, wherein the rod portion passes through the cover assembly, the width of the expansion portion More than the width of the rod portion; and an elastic member disposed in the chamber of the cylinder body, the elastic member is configured to provide an elastic force to the piston rod; wherein the inner wall of the cylinder body has a groove for the buffer At least a portion of the fluid passes; wherein the groove is disposed along a length of the cylinder. The cushioning device of claim 1, wherein the expansion portion has a gap with the inner wall of the cylinder for at least a portion of the buffer fluid to pass therethrough. The cushioning device of claim 1, further comprising a base mounted to the piston rod adjacent to the extension, the base being disposed in the chamber of the cylinder and abutting the elastic member. The cushioning device of claim 3, wherein the piston rod further comprises a mounting portion projecting from the extending portion, the base being mounted to the mounting portion. The cushioning device of claim 3, wherein the base has at least one aperture for passage of at least a portion of the buffer fluid. The buffer device of claim 3, further comprising a control valve movably mounted between the expansion portion of the piston rod and the base. The cushioning device of claim 1, wherein the rod portion, the extension portion and the expansion portion of the piston rod are integrally formed. The cushioning device of claim 1, wherein the extension has a width greater than a width of the stem and the width of the extension is less than a width of the flare. The cushioning device of claim 1, wherein the piston rod is made of a metal material. The cushioning device of claim 1, wherein the covering assembly comprises a cover, a sleeve and a sealing ring, the cover having a space for receiving the sleeve, the rod portion of the piston rod passing through the sleeve, A sealing ring is placed over the cover. A buffer device comprising: a cylinder comprising an inner wall defining a chamber, and an opening communicating with the chamber, the chamber being filled with a buffer fluid; a cover assembly disposed adjacent the opening of the cylinder; a piston rod Relating to the cylinder, the piston rod includes a rod portion, an extending portion, and an expanding portion between the rod portion and the extending portion, wherein the rod portion, the extending portion and the expanding portion are integrally formed, wherein The rod portion protrudes from the opening, the width of the expansion portion is greater than the width of the rod portion, and the expansion portion a gap is formed between the inner wall of the cylinder for at least a portion of the buffer fluid; a base is mounted to the piston rod adjacent to the extension, and the base is located in the chamber of the cylinder; a control valve is movably mounted between the expansion portion of the piston rod and the base; and an elastic member is disposed in the chamber of the cylinder, the elastic member for providing an elastic force to the piston rod; wherein, the piston When the rod receives the force in a first direction, the elastic member accumulates an elastic force, and the control valve is in a position relative to the expansion portion of the piston rod to block the gap; wherein when the force in the first direction is released, The piston rod is adapted to be displaced in a second direction by the elastic force of the elastic member, so that the control valve is away from the position without blocking the gap; wherein the inner wall of the cylinder has a groove for the buffer At least a portion of the fluid passes; wherein the groove is disposed along a length of the cylinder.