CN209925496U

CN209925496U - Pressure bar

Info

Publication number: CN209925496U
Application number: CN201920583355.6U
Authority: CN
Inventors: 苏淑云
Original assignee: Yunshuo Co Ltd
Current assignee: Yunshuo Co Ltd
Priority date: 2019-04-26
Filing date: 2019-04-26
Publication date: 2020-01-10
Anticipated expiration: 2029-04-26

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 present invention relates to a damping device, and more particularly to a pressure bar using fluid compression characteristics.

Background

Conventional pressure bars generally include an outer tube defining a chamber, a piston axially movable within the chamber, and a piston rod connected to the piston. According to different applications, the damping device can be divided into a plurality of forms, wherein one form is that gas is filled in the cavity, and when the piston rod is driven by external force to drive the piston, the damping effect is generated through the characteristic that the gas can be compressed.

In another form, the piston divides the chamber into two sub-spaces, the piston has a flow passage communicating with the sub-spaces, and the pressure bar further comprises a control unit which can be driven to open or close the flow passage. The chamber may be filled with a fluid medium such as a liquid or a gas. The flow passage is opened by the control unit, and the pressure of the fluid medium filled in the flow passage can be balanced after the flow passage is communicated with the subspace, so that the piston can move in the chamber, and the piston rod can axially move to adjust the elongation. After the control unit closes the flow channel, the subspace is not communicated, so that the piston is limited and fixed by the pressure of the fluid medium in the subspace, the extension amount of the piston rod is further fixed, and the function of adjusting the extension distance of the pressure rod is achieved. Because the structure and action principle of the pressure bar in the two forms are different, if the functions of buffering, shock absorption and adjusting the telescopic length are needed at the same time, products with similar double functions are lacked in the current commercially available products.

Disclosure of Invention

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

The utility model discloses a pressure bar contains outer tube mechanism, partition mechanism, buffer gear, and adjustment mechanism. The outer tube mechanism defines a main chamber. The separation mechanism is fixed in the main chamber in an airtight manner, and separates the main chamber into a buffer space and an adjusting space which are not communicated with each other and are axially spaced 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.

The utility model discloses a pressure bar, outer tube mechanism is including delimiting the pipe wall of main cavity room, the pipe wall has two axial interval and radial evagination and cooperate with it will to separate the mechanism location in its inside protruding ring portion.

The utility model discloses a pressure bar, buffer gear include airtight stopper adorn in buffer piston spare in the buffering space, and link buffer piston spare is followed outer tube mechanism axial is toward stretching out outward buffer beam of outer tube mechanism.

The utility model discloses a pressure bar, adjust the piston unit have airtight stopper adorn in just separate in the outer tube mechanism first district with the piston portion in second district, and certainly the piston portion is followed outer tube mechanism axial is toward outer outstanding stretch out the extension pipe portion of outer tube mechanism, the runner has the axial and runs through piston portion and intercommunication the axial hole in first district, and radially wear to locate extension pipe portion and intercommunication the axial hole with the radial hole in second district, the control unit has and wears to locate just can open and seal in the axial hole the round pin that opens and shuts of axial hole, and set up in extend in the pipe portion and can be driven and promote the round pin that opens and shuts for piston portion axial displacement and open the control lever in axial hole.

The utility model discloses a pressure bar, separate the mechanism including the laminating and fixed spacing in separate the piece in the outer tube mechanism, the concave annular that is equipped with of outer anchor ring of separating the piece, separate the mechanism still including inlay the stopper in the annular and elasticity tightly support in outer tube mechanism just is annular packing ring.

The utility model discloses a pressure bar, separate the mechanism including laminate in the inner peripheral surface of pipe wall and fixed spacing in the separation piece between the protruding ring portion, the concave annular that is equipped with of outer anchor ring of separation piece, separate the mechanism still including inlay the stopper in the annular and elasticity tightly support in the packing ring of pipe wall.

The beneficial effects of the utility model reside in that: the outer tube mechanism is divided into two spaces which are not communicated with each other by the separating mechanism, so that the buffer mechanism and the adjusting mechanism can independently operate and are arranged on the outer tube mechanism at the same time without interfering with each other, and the pressure bar can have the functions of buffering, shock absorption and adjusting the telescopic length at the same time.

Drawings

Other features and advantages of the present invention will become apparent from the following detailed description of the preferred embodiments with reference to the accompanying drawings, in which:

FIG. 1 is a cross-sectional view of one embodiment of a pressure bar of the present invention;

FIG. 2 is a fragmentary cross-sectional view illustrating a spacer mechanism fixedly retained within an outer tube mechanism;

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

fig. 4 is a view similar to fig. 3 illustrating the control unit being actuated to open the flow passage.

Detailed Description

Referring to fig. 1 and 2, an embodiment of the pressure bar of the present invention is suitable for being installed between a seat cushion and a body of a bicycle (not shown), or between a front fork and a grip of the bicycle, or between a seat cushion and a foot rest of a chair (not shown), but is not limited to the above-mentioned position. The pressure bar comprises an outer tube mechanism 1, a separating mechanism 2, a buffering mechanism 3, and an adjusting mechanism 4.

The outer tube mechanism 1 extends axially upward and downward and includes a tube wall 11 defining a main chamber 10, and two airtight units 12 respectively airtightly provided at both ends of the tube wall 11. The tube wall 11 has two axially spaced and radially inwardly projecting collar portions 111. Because the utility model has the common knowledge in the technical field, has the installation the general knowledge of airtight unit 12, just airtight unit 12 is not the focus of the creation of the utility model, so the explanation is omitted here.

The partition mechanism 2 is hermetically sealed and installed in the pipe wall 11, and is positioned between the two by the convex ring part 111, so as to partition the main chamber 10 into a buffer space 101 and an adjustment space 102 which are not communicated with each other and are spaced along the axial direction of the outer pipe mechanism 1. The partition mechanism includes a partition block 21 attached to the inner circumferential surface of the pipe wall 11, and a ring-shaped gasket 22. The outer periphery of the partition block 21 is provided with a ring groove 210 for the gasket 22 to be inserted. The gasket 22 is made of elastic material such as rubber or silica gel, and is inserted into the annular groove 210 and elastically pressed against the pipe wall 11.

The damping means 3 is airtightly mounted in the damping space 101 and is axially displaceable relative to the outer tube means 1. The damping mechanism 3 includes a damping piston member 31 airtightly fitted in the damping space 101, and a damping rod 32 connected to the damping piston member 31 and projecting upward from the outer tube mechanism 1 in the axial direction of the outer tube mechanism 1. The damping rod 32 can be driven to axially retract into the damping space 101 relative to the outer tube mechanism 1, so as to drive the damping piston member 31 to compress the damping space 101.

Referring to fig. 1, 3 and 4, the adjusting mechanism 4 is hermetically mounted in the adjusting space 102 and can axially displace relative to the outer tube mechanism 1. The adjusting mechanism 4 comprises an adjusting piston unit 41 which is mounted in the adjusting space 102 in an axially displaceable, gas-tight manner and projects downwards out of the outer tube mechanism 1, and a control unit 42 which is arranged in the adjusting piston unit 41.

The adjusting piston unit 41 has a piston portion 411 tightly fitted in the outer tube mechanism 1 and dividing the adjusting space 102 into a first area 401 near the dividing mechanism 2 and a second area 402 near the end edge of the outer tube mechanism 1, and an extension tube portion 412 protruding downward from the piston portion 411 along the axial direction of the outer tube mechanism 1 from the outer tube mechanism 1. The extension pipe portion 412 has an extension 413 extending out of the outer pipe mechanism 1, an expansion 414 near the piston portion 411 and having an outer diameter larger than that of the extension 413, and a shoulder 415 located between the extension 413 and the expansion 414 and being limited to one of the airtight units 12 when axially displaced 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 near the piston portion 411, and a guide portion 418 having a smaller diameter than the mounting portion 417 and communicating from the mounting portion 417 to the outside of the extension pipe portion 412.

The regulating piston unit 41 also has a flow passage 403 which communicates the first zone 401 with the second zone 402. The flow passage 403 has an axial hole 404 axially penetrating the piston portion 411 to communicate with the first region 401, and a radial hole 405 radially penetrating the extension pipe portion 412 to communicate the axial hole 404 with the second region 402.

The control unit 42 is driven to open and close the flow passage 403, and has an opening and closing pin 421 axially movably inserted in the axial hole 404 and extending downward to the expanding section 414, and a control rod 422 axially movably inserted in the extending pipe part 412. The open/close pin 421 has a plugging portion 423 capable of plugging and closing the axial hole 404, and a first rod portion 424 extending downward from the plugging portion 423 and passing through the mounting portion 417 of the axial hole 416. The control rod 422 has an abutting portion 425 received in the mounting portion 417 and a second rod portion 426 extending downward from the abutting portion 425 through the guiding portion 418 and protruding outward from the extending portion 413, wherein at least a portion of the outer diameter of the abutting portion 425 is larger than the aperture of the guiding portion 418, and is retained in the mounting portion 417 while moving downward.

Referring to fig. 1, 3 and 4, in this embodiment, for example, the pressure bar is installed between a bicycle body and a seat cushion of a bicycle, the extension pipe 412 of the adjusting mechanism 4 is installed on the bicycle body, the buffer rod 32 is installed on the seat cushion, the buffer space 101 is filled with air, and the adjusting space 102 is filled with hydraulic oil 6.

When a user sits on the seat cushion, since the air filled in the buffer space 101 has compressibility, the buffer rod 32 is driven to retract into the outer tube mechanism 1 under the influence of gravity and drives the buffer piston member 31 to compress the air filled in the buffer space 101 downward, thereby generating the effect of buffering and shock absorption.

The piston portion 411 of the adjusting piston unit 41 is restricted from moving by the hydraulic oil 6 filled therein because the first area 401 is not communicated with the second area 402. When a user needs to adjust the height of the seat cushion, for example, to adjust the height of the seat cushion, an external pulling mechanism (not shown) is operated to push the second rod 426 of the control rod 422 upwards, and the abutting portion 425 is linked upwards to push the first rod 424 of the open/close pin 421, so that the inserting portion 423 moves upwards and opens the axial hole 404, and further the flow channel 403 is opened to communicate the first area 401 and the second area 402, so that the hydraulic oil 6 filled in the adjustment space 102 can flow through the first area 401 and the second area 402. Thereby allowing the adjusting piston unit 41 to move axially upward relative to the outer tube mechanism 1 to reduce the seat cushion height. When the adjusting piston unit 41 moves toward the partition 2, the volume in the adjusting space 102 is reduced by the volume occupied by the adjusting piston unit 41, and a restoring pressure is accumulated in the adjusting space 102. After adjusting the height of the seat cushion to a proper height, the user removes the force applied to the second rod 426 by the pulling mechanism, and the open/close pin 421 is not supported by the upward pushing force of the control rod 422 and is pushed back to the position embedded in the axial hole 404 by the restoring pressure, so as to close the flow channel 403 and prevent the adjusting piston unit 41 from moving relative to the outer tube mechanism 1.

If the height of the seat cushion is to be increased, the pulling mechanism pushes the control rod 422 to keep the flow channel 403 open, so that the adjusting piston unit 41 is in a movable state, at this time, the restoring pressure pushes the adjusting piston unit 41 outwards, and when the user moves to the proper height of the seat cushion, the pulling mechanism is driven to remove the force applied to the second rod 426, so that the flow channel 403 is closed to stop the downward displacement of the adjusting piston unit 41, or until the shoulder section 415 abuts against and stops at the airtight unit 12, so that the pressure rod reaches the longest length, and the seat cushion is adjusted to the highest position.

It should be noted that the partition mechanism 2 is not limited to be fixed and limited in the pipe wall 11 by the raised ring portion 111, and may also be fixed by welding or other attachment methods, and the effect of fixing the partition mechanism 2 in the pipe wall 11 and dividing the main chamber 10 into two spaces can be achieved. The adjustment space 102 can be filled with gas, and the adjustment mechanism 4 can achieve the purpose of adjusting the telescopic length of the extension pipe part 412 by controlling the communication between the first zone 401 and the second zone 402.

To sum up, the utility model discloses the efficiency of pressure bar lies in: the separation mechanism 2 is utilized to separate the main chamber 10 into the buffering space 101 for the installation of the buffering mechanism 3 and the adjusting space 102 for the installation of the adjusting mechanism 4, so that the pressure bar has the functions of buffering, shock absorption and adjusting the amount of expansion and contraction at the same time, thereby achieving the purpose of the utility model.

The above description is only an example of the present invention, and the scope of the present invention should not be limited thereby, and all simple equivalent changes and modifications made in the claims and the specification of the present invention are also included in the scope of the present invention.

Claims

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.