CN209925496U - Pressure bar - Google Patents

Abstract

A pressure bar comprises an outer tube mechanism, a separation mechanism, a buffer mechanism and an adjusting mechanism. The outer tube mechanism defines a main chamber. The separation mechanism is fixed in the main chamber in an airtight manner and divides the main chamber into a buffer space and an adjusting space. The buffer mechanism is arranged in the buffer space and can be driven to compress the buffer space. The adjusting mechanism is arranged in the adjusting space and comprises an adjusting piston unit with a flow channel and a control unit capable of openably closing the flow channel, the adjusting piston unit divides the adjusting space into a first area and a second area communicated with the flow channel, and the adjusting piston unit can be driven to stretch and displace relative to the outer pipe mechanism when the flow channel is opened. Therefore, the pressure bar has the functions of buffering and adjusting the expansion amount at the same time.

Description

pressure bar

technical field

The utility model relates to a damping device, in particular to a pressure rod utilizing the compressive properties of fluid.

Background technique

The existing pressure rod mainly includes an outer tube defining a chamber, a piston that can move axially in the chamber, and a piston rod connected with the piston. According to different applications, it can be divided into various forms, one of which is to fill the chamber with gas. When the piston rod is driven by an external force, the gas can be compressed to produce the effect of buffering and shock absorption.

Another form of pressure rod, the piston divides the chamber into two subspaces, the piston has a flow channel communicating with the subspaces, and the pressure rod also includes a drive that can be actuated to open or close the flow channel control unit. The chamber can be filled with fluid medium such as liquid or gas. The flow channel is opened by the control unit, and the pressure of the fluid medium filled therein can be balanced at the same time after the subspace is connected, so the piston can move in the chamber, so that the piston rod can move axially to adjust the extension length. After the control unit closes the flow channel, since the subspace is not connected, the piston is limited and fixed by the pressure of the fluid medium in the subspace, so that the elongation of the piston rod is fixed, so that the adjustment can be achieved. Describe the function of the extension distance of the pressure bar. Because the structures and working principles of the above two types of pressure bars are different, if the functions of buffering and shock absorption and adjusting the telescopic length are required at the same time, there are few products on the market that have similar dual functions.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a pressure bar that overcomes at least one disadvantage of the prior art.

The pressure rod of the utility model comprises an outer tube mechanism, a separation mechanism, a buffer mechanism and an adjustment mechanism. The outer tube mechanism defines a main chamber. The separating mechanism is air-tightly fixed in the main chamber, and separates the main chamber into a buffer space and an adjustment space that are not communicated with each other and are spaced axially along the outer tube mechanism. The buffer mechanism is airtightly installed in the buffer space and protrudes out of the outer pipe mechanism, and can be driven to retract into the outer pipe mechanism to compress the buffer space; the adjustment mechanism is installed in the outer pipe mechanism. an adjustment space and can be axially displaced relative to the outer pipe mechanism, the adjustment mechanism includes an adjustment piston unit that can axially displace an airtight plug mounted in the adjustment space and protrudes out of the outer pipe mechanism , and a control unit arranged in the adjusting piston unit, the adjusting piston unit divides the adjusting space into a first area close to the partition mechanism and a second area close to the end edge of the outer tube mechanism, and There is a flow channel connecting the first area and the second area, the control unit can be driven to open the flow channel, and the regulating piston unit can be opened when the control unit opens the flow channel It is driven to telescopically displace relative to the outer tube mechanism.

In the pressure bar of the present invention, the outer tube mechanism includes a tube wall defining the main chamber, the tube wall has two axial intervals and radially inwardly protrudes to cooperate to locate the separation mechanism in its interior the convex ring part.

In the pressure rod of the present invention, the buffer mechanism comprises a buffer piston member with an airtight plug installed in the buffer space, and the buffer piston member is connected and protrudes out of the outer tube along the axis of the outer tube mechanism. The buffer rod of the tube mechanism.

In the pressure rod of the present invention, the regulating piston unit has a piston part with an airtight plug installed in the outer tube mechanism and separating the first area and the second area; The outer tube mechanism axially protrudes out of the extension tube portion of the outer tube mechanism, the flow channel has an axial hole that axially penetrates the piston portion and communicates with the first area, and is radially penetrated through the extension tube portion of the outer tube mechanism. The extending pipe part is connected to the axial hole and the radial hole of the second area, and the control unit has an opening and closing pin that penetrates through the axial hole and can openably close the axial hole , and a control rod disposed in the extension pipe portion and capable of being driven to push the opening and closing pin relative to the piston portion to axially displace to open the axial hole.

In the pressure bar of the present invention, the separation mechanism includes a separation block that is attached and fixed in the outer tube mechanism, the outer annular surface of the separation block is concavely provided with a ring groove, and the separation mechanism further comprises a caulking The ring groove is in the annular groove and is elastically tight against the outer tube mechanism and is a ring-shaped washer.

In the pressure bar of the present invention, the partition mechanism comprises a partition block which is attached to the inner peripheral surface of the pipe wall and is fixed and limited between the convex ring parts, and the outer ring surface of the partition block is concavely provided with a ring groove , the separating mechanism further comprises a gasket which is inserted into the annular groove and elastically pressed against the pipe wall.

The beneficial effect of the present invention is that: the outer tube mechanism is divided into two spaces that do not communicate with each other by the separation mechanism, so that the buffer mechanism and the adjustment mechanism can operate independently without interfering with each other. In the outer tube mechanism, the pressure rod can have the functions of buffering and shock absorption and adjusting the telescopic length at the same time.

Description of drawings

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein:

Fig. 1 is a sectional view of an embodiment of a pressure bar of the present invention;

Figure 2 is an incomplete cross-sectional view illustrating that a partition mechanism is fixedly confined within an outer tube mechanism;

Figure 3 is a fragmentary cross-sectional view illustrating a control unit of an adjustment mechanism closing off the flow passage; and

Fig. 4 is a view similar to Fig. 3, illustrating that the control unit is driven to open the flow channel.

Detailed ways

Referring to Figures 1 and 2, an embodiment of the pressure bar of the present invention is suitable for being installed between the seat cushion and the body of a bicycle (not shown), or between the front fork and the handle of a bicycle, or installed in a chair (not shown) between the seat cushion and the tripod, but the implementation is not limited to the position. The pressure rod includes an outer tube mechanism 1 , a separation mechanism 2 , a buffer mechanism 3 , and an adjustment mechanism 4 .

The outer tube mechanism 1 extends axially up and down, and includes a tube wall 11 defining a main chamber 10 , and two airtight units 12 airtightly disposed at both ends of the tube wall 11 . The pipe wall 11 has two axially spaced and radially inwardly projecting annular portions 111 . Since those with ordinary knowledge in the technical field of the present invention have common knowledge of installing the airtight unit 12 , and the airtight unit 12 is not the focus of the creation of the present invention, the description is omitted here.

The partition mechanism 2 is airtightly installed in the pipe wall 11 , and is positioned between the two by the convex ring portion 111 , so as to partition the main chamber 10 into non-communicating parts along the outer pipe mechanism 1 . A buffer space 101 and an adjustment space 102 are axially spaced apart. The separating mechanism includes a separating block 21 which is attached to the inner peripheral surface of the pipe wall 11 , and a ring-shaped washer 22 . The outer peripheral surface of the partition block 21 is provided with an annular groove 210 for the gasket 22 to be inserted into. The gasket 22 is made of elastic material such as rubber or silicone, and is inserted into the annular groove 210 and elastically pressed against the pipe wall 11 .

The buffer mechanism 3 is airtightly installed in the buffer space 101 and can be axially displaced relative to the outer tube mechanism 1 . The buffer mechanism 3 includes a buffer piston member 31 with an airtight plug installed in the buffer space 101 , and a buffer piston member 31 connected to the buffer piston member 31 and protruding upward from the outer tube mechanism 1 along the axial direction of the outer tube mechanism 1 . Buffer rod 32 . The buffer rod 32 can be driven to be axially retracted into the buffer space 101 relative to the outer tube mechanism 1 to drive the buffer piston member 31 to compress the buffer space 101 .

Referring to FIGS. 1 , 3 and 4 , the adjustment mechanism 4 is airtightly installed in the adjustment space 102 and can be axially displaced relative to the outer tube mechanism 1 . The adjusting mechanism 4 includes an adjusting piston unit 41 , an axially displaceable airtight plug mounted in the adjusting space 102 and protruding downwardly out of the outer tube mechanism 1 , and a control piston unit 41 disposed in the adjusting piston unit 41 . unit 42.

The regulating piston unit 41 has an airtight plug installed in the outer tube mechanism 1 , and divides the regulating space 102 into a first area 401 near the partition mechanism 2 and a second area near the end edge of the outer tube mechanism 1 The piston portion 411 of 402, and an extension tube portion 412 protruding downward from the piston portion 411 along the outer tube mechanism 1 axially out of the outer tube mechanism 1 . The extension tube portion 412 has an extension portion 413 extending out of the outer tube mechanism 1 , an enlarged portion 414 close to the piston portion 411 and having an outer diameter larger than the outer diameter of the extension portion 413 , and an extension portion 413 located between the extension portion 413 and the extension portion 413 . The enlarged sections 414 are constrained to a shoulder section 415 of one of the airtight units 12 between and when displaced axially downward.

The extension pipe portion 412 defines a shaft hole 416 for the control unit 42 to pass through. The shaft hole 416 has a mounting portion 417 close to the piston portion 411 , and a hole diameter smaller than that of the mounting portion 417 and extending from the mounting portion 417 The guide portion 418 outside the extension pipe portion 412 is communicated.

The regulating piston unit 41 also has a flow channel 403 connecting the first area 401 and the second area 402 . The flow channel 403 has an axial hole 404 which axially penetrates the piston portion 411 and communicates with the first region 401 , and an axial hole 404 which radially penetrates the extension pipe portion 412 and communicates with the axial hole 404 and the second region 402 of radial holes 405.

The control unit 42 can be driven to open and close the flow channel 403, and has an opening and closing pin 421 that can be axially moved through the axial hole 404 and extends downward to the enlarged section 414, and a The control rod 422 is axially movably penetrated in the extension pipe portion 412 . The opening and closing pin 421 has a caulking portion 423 that can caulk and seal the axial hole 404 , and a first caulking portion 423 extending downward from the caulking portion 423 and passing through the mounting portion 417 of the shaft hole 416 . Rod 424 . The control rod 422 has an abutting portion 425 accommodated in the mounting portion 417 and a second rod portion extending downward from the abutting portion 425 through the guiding portion 418 and protruding out of the extending portion 413 426, at least part of the outer diameter of the abutting portion 425 is larger than the aperture of the guide portion 418, and will be limited to the mounting portion 417 when moving downward.

Referring to FIGS. 1 , 3 and 4 , the present embodiment is installed between the body of a bicycle and the seat pad as an example. The pressure rod is installed on the body by the extension pipe 412 of the adjusting mechanism 4 . , and the cushion rod 32 is used to install the seat cushion, and the cushion space 101 is filled with air, and the adjustment space 102 is filled with hydraulic oil 6 .

When the user sits on the seat cushion, due to the compressibility of the air filled in the buffer space 101, the buffer rod 32 is driven to retract into the outer tube mechanism 1 under the influence of gravity, and is linked to the buffer piston The element 31 compresses the air filled in the buffer space 101 downward to produce the effect of buffering and shock absorption.

Because the first area 401 and the second area 402 do not communicate with each other, the piston portion 411 of the regulating piston unit 41 is restricted by the hydraulic oil 6 filled therein and cannot move. When the user needs to adjust the height of the seat cushion, taking lowering the height of the seat cushion as an example, by operating an external pulling mechanism (not shown), the second rod portion 426 of the control rod 422 is pushed upward, and the second rod portion 426 of the control rod 422 is upwardly linked. The abutting portion 425 pushes the first rod portion 424 of the opening and closing pin 421, so that the caulking portion 423 moves upward and opens the axial hole 404, thereby opening the flow channel 403 to connect the first area 401 with the second The area 402 allows the hydraulic oil 6 filled in the adjustment space 102 to flow through the first area 401 and the second area 402 . Further, the adjusting piston unit 41 can be moved axially upward relative to the outer tube mechanism 1 to reduce the height of the seat cushion. When the adjusting piston unit 41 moves toward the separating mechanism 2 , the volume in the adjusting space 102 is reduced by the adjusting piston unit 41 , so that a return pressure is accumulated in the adjusting space 102 . After adjusting the height of the seat cushion to an appropriate height, the user removes the force applied to the second rod portion 426 through the pulling mechanism. At this time, the opening and closing pin 421 is not supported by the upward pushing force of the control rod 422 , and It is pushed back to the position where it is caulked in the axial hole 404 by the restoring pressure, thereby closing the flow channel 403 so that the regulating piston unit 41 cannot move relative to the outer tube mechanism 1 .

If the height of the seat cushion is to be increased, the control rod 422 is also pushed through the pulling mechanism to keep the flow channel 403 open, so that the adjusting piston unit 41 can be moved. The unit 41 is pushed outward, and when the user moves to an appropriate seat cushion height, the user can drive the pulling mechanism to remove the force applied to the second rod portion 426, so that the flow channel 403 is closed and the adjusting piston unit is 41 stops the downward displacement, or until the shoulder section 415 abuts against the airtight unit 12 and stops, so that the pressure rod can reach the longest length and the seat cushion can be adjusted to the highest position.

It should be noted that the partition mechanism 2 is not limited to being fixed and limited in the pipe wall 11 by the convex ring portion 111 , but can also be fixed by welding or other bonding methods. The function of dividing the main chamber 10 into two spaces within the pipe wall 11 . The adjustment space 102 can also be filled with gas, and the adjustment mechanism 4 can also adjust the telescopic length of the extension pipe portion 412 by controlling whether the first area 401 and the second area 402 communicate with each other.

To sum up, the effect of the pressure bar of the present invention is that the main chamber 10 is divided into the buffer space 101 for the installation of the buffer mechanism 3 and the adjustment space for the installation of the adjustment mechanism 4 by the partition mechanism 2 102, so that the pressure bar has the functions of buffering and shock absorption and adjusting the amount of expansion and contraction at the same time, so it can indeed achieve the purpose of the present invention.

The above are only examples of the present invention, and should not limit the scope of implementation of the present invention, any simple equivalent changes and modifications made according to the claims and description of the present invention are still It belongs to the scope of the present invention.

Claims (6)

1. A pressure bar, comprising: outer tube mechanism, buffer gear who defines the main cavity room, and adjustment mechanism, its characterized in that: the pressure rod also comprises a separation mechanism which is hermetically fixed in the main chamber and divides the main chamber into a buffer space and an adjusting space which are not communicated with each other and are axially separated along the outer tube mechanism; the buffer mechanism is hermetically arranged in the buffer space, protrudes out of the outer tube mechanism and can be driven to retract into the outer tube mechanism to compress the buffer space; the adjusting mechanism is arranged in the adjusting space and can axially displace relative to the outer pipe mechanism, the adjusting mechanism comprises an adjusting piston unit which can be axially displaced and hermetically plugged in the adjusting space and protrudes outwards out of the outer pipe mechanism, and a control unit arranged in the adjusting piston unit, the adjusting piston unit divides the adjusting space into a first area close to the separating mechanism and a second area close to the end edge of the outer pipe mechanism, and a flow passage which communicates the first area with the second area is arranged, the control unit can be driven to be opened and closed, and the adjusting piston unit can be driven to be relatively telescopically displaced relative to the outer pipe mechanism when the control unit opens the flow passage.

2. The pressure bar of claim 1, wherein: the outer tube mechanism includes a tube wall defining the main chamber, the tube wall having two axially spaced and radially inwardly projecting collar portions which cooperate to locate the partition mechanism within.

3. The pressure bar of claim 1, wherein: the buffer mechanism comprises a buffer piston piece hermetically plugged in the buffer space, and a buffer rod which is connected with the buffer piston piece and protrudes outwards from the outer pipe mechanism along the axial direction of the outer pipe mechanism.

4. The pressure bar of claim 1, wherein: the adjusting piston unit is provided with a piston part which is hermetically plugged in the outer pipe mechanism and separates the first area from the second area, and an extension pipe part which axially extends outwards from the piston part along the outer pipe mechanism, the flow passage is provided with an axial hole which axially penetrates through the piston part and is communicated with the first area, and a radial hole which radially penetrates through the extension pipe part and is communicated with the axial hole and the second area, the control unit is provided with an opening and closing pin which is arranged in the axial hole in a penetrating manner and can openably close the axial hole, and a control rod which is arranged in the extension pipe part and can be driven to push the opening and closing pin to axially displace relative to the piston part so as to open the axial hole.

5. The pressure bar of claim 1, wherein: the separating mechanism comprises a separating block which is attached and fixedly limited in the outer pipe mechanism, an annular groove is concavely arranged on the outer ring surface of the separating block, and the separating mechanism further comprises a gasket which is embedded and plugged in the annular groove, elastically and tightly abuts against the outer pipe mechanism and is annular.

6. A pressure bar according to claim 2, wherein: the separating mechanism comprises separating blocks which are attached to the inner circumferential surface of the pipe wall and fixedly limited between the convex ring parts, annular grooves are concavely formed in the outer circumferential surfaces of the separating blocks, and the separating mechanism further comprises gaskets which are embedded in the annular grooves and elastically and tightly abut against the pipe wall.

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