CN111810569A

CN111810569A - Automatic pressure regulating pneumatic cylinder

Info

Publication number: CN111810569A
Application number: CN201910304094.4A
Authority: CN
Inventors: 郑嘉宝; 梁智炫
Original assignee: Ken Dall Enterprise Co Ltd
Current assignee: Ken Dall Enterprise Co Ltd
Priority date: 2019-04-12
Filing date: 2019-04-12
Publication date: 2020-10-23

Abstract

An automatic pressure regulating pneumatic cylinder comprises a pneumatic cylinder body, wherein a connecting piece is arranged below the pneumatic cylinder body in a closed manner, a piston is arranged above the connecting piece in a sliding manner, the pneumatic cylinder body is matched with the upper part of the piston to form an upper air chamber, the lower part of the piston is matched with the upper part of the connecting piece to form a lower air chamber, a first air inlet channel and a second air inlet channel for one-way circulation of external air to the upper air chamber and a first guide channel for one-way circulation of the external air to the lower air chamber to be converted into internal air are arranged outside the pneumatic cylinder body, an air flow control unit consisting of an exhaust floating piston, a sealing piece, an elastic piece and an exhaust floating piston limiter is embedded inside the connecting piece, and the exhaust floating piston can correspondingly form an air channel to be matched and opened and closed to further guide an internal air container in the lower air chamber to generate different air pressure resistance and exhaust in a normal-speed and quick displacement, the purpose of automatically adjusting the internal pressure of the air cylinder is achieved.

Description

Automatic pressure regulating pneumatic cylinder

Technical Field

The invention relates to an automatic pressure regulating pneumatic cylinder, which utilizes a plurality of channels for one-way suction of external air and one-way exhaust, and enables a piston arranged in the cylinder to regulate the volume of an upper air chamber and a lower air chamber and the exhaust speed through the speed between steps, thereby automatically regulating the state which is most suitable for a user.

Background

The use of pneumatic cylinders in prosthetic joints is increasingly sophisticated in medical practice and technology with the advance of medicine, and is a common and popular design, but when users install and use the pneumatic cylinders, they must first make tedious and time-consuming adjustments to the body type, habits of use, comfort …, etc., and finally make the users feel comfortable.

Please refer to a case of US9180026, which discloses an adjustment-free buffering pneumatic cylinder, utilizing a pneumatic chamber formed inside the pneumatic cylinder, and arranging a piston member inside the pneumatic chamber to divide the pneumatic chamber into an upper air chamber and a lower air chamber, wherein one end of the piston member is arranged inside the pneumatic chamber, the other end of the piston member extends to the outside of the pneumatic cylinder, and a first check valve is arranged inside the piston member and connected with the upper air chamber and the lower air chamber to enable airflow to enter the lower air chamber from the upper air chamber in a single direction, and an upper air channel is formed in the pneumatic cylinder and communicated with the upper air chamber and the outside; a second check valve is arranged in the upper air channel, one end of the second check valve is communicated with the outside, the other end of the second check valve is communicated with the upper air chamber, and air flow can flow into the upper air chamber from the outside in a single direction; the lower air channel is formed in the pneumatic cylinder and connected to the lower air chamber and the outside, and the aperture of the upper air channel is larger than that of the lower air channel, so that the air flow inlet rate of the pneumatic chamber is larger than the air flow outlet rate. Therefore, the complex internal structure of the original pneumatic cylinder can be improved, the advantages of one-way air supply and air exhaust are utilized, the regular air filling can be omitted, the air inlet can be automatically adjusted along with the walking habit of a user, and the problem of buffering sudden impact is solved.

However, if the adjustment-free cushion air cylinder only depends on the structure that the single air supplement amount is larger than the air displacement amount, the air displacement and the air inlet amount of the check valve must be accurately adjusted by hand, and there is no room for cushioning.

Disclosure of Invention

In view of the above circumstances and problems, an embodiment of the present invention discloses an automatic pressure regulating pneumatic cylinder, which utilizes a plurality of channels for one-way suction of external air and one-way exhaust of air, and automatically adjusts the volume of upper and lower chambers and the exhaust speed of the piston disposed therein to a state optimal for a user by adjusting the speed between steps.

The invention relates to an automatic pressure regulating pneumatic cylinder, which comprises a pneumatic cylinder body, wherein a connecting piece is arranged below the interior of the pneumatic cylinder body in a matched mode and is closed, a piston is arranged above the connecting piece in a sliding mode, the interior of the pneumatic cylinder body is matched with the upper side of the piston to form an upper air chamber, the lower side of the piston is matched with the upper side of the connecting piece to form a lower air chamber, and a first air inlet channel and a second air inlet channel which are used for allowing external air to flow to the upper air chamber in a one-way mode and a first guide channel which is used for allowing the external air to flow to the lower air chamber in a;

the air flow control unit is embedded in the connecting piece and consists of an exhaust floating piston, a sealing piece, an elastic piece and an array of air floating piston limiters, and the exhaust floating piston can correspondingly form an air channel to open and close under the normal-speed and quick displacement state through the piston so as to guide the internal air of the lower air chamber to generate different air pressure resistance and ensure that the air pressure cylinder body achieves the purpose of automatically adjusting the internal pressure;

wherein, this first inlet passage contains: the first one-way valve is set in the first air inlet channel and connected to the upper air chamber via the first air inlet channel and the second air inlet channel, so that the outside air A can enter the upper air chamber via the motion of the piston.

Wherein, this second air intake passage contains: and the second one-way valve is arranged in the second air inlet channel, so that the external air A can enter the upper air chamber through the movement of the piston.

Wherein, the first guiding channel comprises: and the third one-way valve is arranged in the first guide channel, and the first guide channel is symmetrically arranged opposite to the second air inlet channel.

Compared with the automatic pressure regulating pneumatic cylinder disclosed by the embodiment of the invention in the prior art, the automatic pressure regulating pneumatic cylinder disclosed by the embodiment of the invention can be mainly used for averagely applying the first air inlet channel and the second air inlet channel which can suck external air in a single direction to the downward direction of the piston according to the activity state of a user, converting the external air in the upper air chamber into internal air in the lower air chamber through the first guide channel, and then automatically regulating the internal air pressure resistance of the pneumatic cylinder body by the aid of the air flow control unit so as to control the exhaust action of the lower air chamber, and is easier to apply compared with the manual precision regulation in the prior art.

Drawings

Fig. 1 is a perspective view of an automatic pressure regulating pneumatic cylinder according to an embodiment of the present invention.

Fig. 2 is an exploded view of an automatic pressure regulating pneumatic cylinder according to an embodiment of the present invention.

Fig. 3 is a schematic view of an internal structure of a pneumatic cylinder in an automatic pressure regulating pneumatic cylinder according to an embodiment of the present invention.

Fig. 4 is a front view of fig. 1.

Fig. 5 is a right side view of fig. 1.

Fig. 6 is a schematic diagram illustrating the downward displacement of the exhaust floating piston to form an air passage during normal travel of the automatic pressure regulating pneumatic cylinder according to the embodiment of the present invention.

Fig. 7 is a partially enlarged view of fig. 6.

FIG. 8 is a schematic view showing the air sucked into the upper air chamber from the outside into the lower air chamber through the first guide passage when the automatic pressure adjusting pneumatic cylinder according to the embodiment of the present invention is moved rapidly.

FIG. 9 is a schematic diagram of the automatic pressure regulating cylinder of the present invention during fast movement, the piston is displaced downwards and the empty passage is not opened.

Fig. 10 is a partially enlarged view of fig. 9.

Fig. 11 is a schematic view illustrating automatic pressure relief of the lower chamber when the automatic pressure regulating pneumatic cylinder provided by the embodiment of the present invention is at rest.

Fig. 12 is a partially enlarged view of fig. 11.

Description of reference numerals:

10.. pneumatic cylinder

A first air intake passage

A first one-way valve element

1111.. one-way valve

1112

A second air intake passage

A second one-way valve element

1211

1212

1213

A first guide channel

A third one-way valve element

A piston

Go up the air chamber

Lower air chamber

A connector

An airflow control unit

311

A seal member

An elastic member

314

An air channel

External air

Inner air

Detailed Description

The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.

In general, the best possible embodiment, in accordance with the present invention, will be described in detail with reference to FIGS. 1-12 to enhance the understanding of the present invention;

the embodiment of the invention discloses an automatic pressure regulating pneumatic cylinder, which comprises a pneumatic cylinder body 10, wherein a connecting piece 30 is arranged at the lower part of the inner part of the pneumatic cylinder body 10, so that the pneumatic cylinder body 10 is closed, a piston 30 is arranged above the connecting piece 30 in a sliding way, the pneumatic cylinder body 10 is matched with the upper part of the piston 20 to form an upper air chamber 21, and the lower part of the piston 20 is matched with the upper part of the connecting piece 30 to form a lower air chamber 22;

the outside of the cylinder 10 is further provided with a first air inlet channel 11 and a second air inlet channel 12 for one-way circulation of external air A to the upper air chamber 21, and a first guide channel 13 for one-way circulation of the external air A to the lower air chamber 22 and converting the external air A into internal air B;

an airflow control unit 31 is embedded in the connecting member 30, the airflow control unit 30 is composed of a row of air-moving pistons 311, a sealing member 312, an elastic member 313, and a row of air-moving piston stoppers 314 from top to bottom, and the air-moving pistons 311 can correspondingly form an air channel 32 to open and close at normal speed and rapid displacement state through the pistons 20, so as to guide the internal air B of the lower air chamber 22 to generate different air pressure resistances, thereby achieving the purpose of automatically adjusting the internal pressure of the air cylinder 10.

Referring to fig. 1 to 3, it can be seen that the cylinder 10 has a first air inlet channel 11, a second air inlet channel 12, and a first guiding channel 131 disposed at the upper part of the exterior thereof, and each channel has an object disposed therein; the first air intake channel 11 is transversely disposed in the air cylinder 10, the first air intake channel 11 is provided with a first one-way valve 111, the first one-way valve 111 is mainly composed of two sides of a one-way valve 1111 respectively matched by a filter 1112; the second air inlet channel 12 is longitudinally disposed above the outside of the air cylinder 10, and a second one-way valve 121 is disposed therein, the second one-way valve 121 mainly comprises a one-way valve 1211, a one-way valve positioner 1212, and a filter 1213, the one-way valve positioner 1212 is further capable of rotatably adjusting the flow rate of the external air a entering the upper air chamber 21; the first guide channel 13 is symmetrically disposed opposite to the second air inlet channel 12, and a third one-way valve 131 is disposed in the first guide channel 13.

Referring to fig. 5, the definition of the constant speed state is that when the user bends his/her joints at normal walking speed, the piston 20 in the air cylinder 10 is displaced downward, and the upper air chamber 21 sucks the external air a of the air cylinder 10 into the upper air chamber 21 in one direction through the first air inlet channel 11 and the second air inlet channel 12, and the external air a is converted into the internal air B;

as shown in fig. 6-7, the piston 20 compresses the internal air B originally located in the lower air chamber 22, so that the internal air B located in the lower air chamber 22 slightly pushes away the exhaust floating piston 311, thereby forming an air channel 32, but the exhaust floating piston 311 is not sealed by the sealing member 312 to the air channel 32, so that the internal air B can be exhausted to the outside of the air cylinder 10 through the slit of the air channel 32, and the exhaust speed is lower than the speed of compressing the internal air B in the lower air chamber 22, so that when the piston 20 moves downward, the user will feel that the resistance is increased because the internal air B is compressed;

referring to fig. 8, when the piston 20 moves upward, the elastic element 313 is connected to the exhaust floating piston 311, so that the exhaust floating piston 311 is pushed upward to return to its original position, thereby closing the air passage 32, and the external air a of the upper air chamber 21 is pushed to the lower air chamber 22 through the third one-way valve element 131 in the first guiding passage 13 in one way and is converted into the internal air B, thereby completing a movement cycle.

Referring to fig. 9-10, the aforesaid fast state is defined as the speed of the user walking or running at normal speed, i.e. the speed of the piston 20 inside the pneumatic cylinder 10 will change with the displacement rate of the user's joint bending, when the user walks or runs fast, the piston 20 will quickly compress the internal air B of the lower air chamber 22, so that the internal air B will completely push the exhaust floating piston 311 to displace downwards, the exhaust floating piston 311 will engage with the sealing member 312, and further the lower portion of the air passage 32 will be closed, so that the internal air B cannot be exhausted, and at this time, the internal air B of the lower air chamber 22 is continuously compressed, so as to provide enough resistance to the piston 20 moving fast; the motion cycle can provide corresponding air pressure damping adjustment according to the change of the motion speed of the piston 20, so that the air pressure cylinder 10 can achieve the purpose of automatically adjusting the pressure;

referring to fig. 11-12, following the rapid state shown in fig. 9-10, when the piston 20 stops moving, the exhaust floating piston 311 will move upward but not much, thereby releasing the engagement with the sealing member 312, allowing a portion of the excess internal air B to be exhausted out of the cylinder 10 through the air passage 32 and the slit, so that the pressure in the lower air chamber 22 can be the same as the pressure outside the cylinder 10, and the pressure state of the cylinder 10 returns to the original uncompressed state.

In summary, the automatic pressure regulating pneumatic cylinder disclosed in the embodiments of the present invention sucks the external air a into the upper air chamber 21 of the pneumatic cylinder 10 in one way through the cooperation of the first air inlet channel 11 and the second air inlet channel 12, so as to stably push the piston 20 downward, and then the external air a of the upper air chamber 21 can be guided to the lower air chamber 22 for application through the complete closing and opening of the exhaust floating piston 311 and the sealing member 312 in the air flow control unit 31, so that the internal air B of the lower air chamber 22 can be discharged and maintained, and the external air a of the upper air chamber 21 can be guided to the lower air chamber 22 for application through the cooperation of the first guide channel 13 and the piston 20 upward, so that the user can achieve the purpose of automatically regulating pressure at normal speed and fast speed, thereby enhancing comfort and convenience in use.

The construction, features and functions of the present invention are described in detail in the embodiments illustrated in the drawings, which are only preferred embodiments of the present invention, but the present invention is not limited by the drawings, and all equivalent embodiments modified or changed according to the idea of the present invention should fall within the protection scope of the present invention without departing from the spirit of the present invention covered by the description and the drawings.

Claims

1. An automatic pressure regulating pneumatic cylinder, comprising: the air cylinder body (10) is internally provided with a connecting piece (30) in a closed manner at the lower part, a piston (20) is arranged above the connecting piece (30) in a sliding manner, the air cylinder body (10) is matched with the upper part of the piston (20) to form an upper air chamber (21), the lower part of the piston (20) is matched with the upper part of the connecting piece (30) to form a lower air chamber (22), and the air cylinder body (10) is externally provided with a first air inlet channel (11) and a second air inlet channel (12) for one-way circulation of external air (A) to the upper air chamber (21) and a first guide channel (13) for one-way circulation of the external air (A) to the lower air chamber (22) and conversion of the external air (A) to internal air (B); the air flow control unit (31) is embedded in the connecting piece (30), the air flow control unit (31) is composed of a row of air floating pistons (311), a sealing piece (312), an elastic piece (313) and a row of air floating piston limiters (314) from top to bottom, and the air floating pistons (311) are correspondingly formed into an air channel (32) to be opened and closed through the pistons (20) in a normal-speed and quick displacement state.

2. The automatic pressure regulating pneumatic cylinder as claimed in claim 1, wherein the first air intake passage (11) includes: a first one-way valve (111) composed of a one-way valve (1111) with two ends respectively matching with a filter element (1112), and the first one-way valve (111) is arranged in the first air inlet channel (11), and is communicated to the upper air chamber (21) through the first air inlet channel (11) matching with the second air inlet channel (11), so that the external air (A) can enter the upper air chamber (21) through the movement of the piston (20).

3. The automatic pressure regulating pneumatic cylinder as claimed in claim 1, wherein the second air intake passage (12) comprises: a second one-way valve (121) comprising a one-way valve (1211), a one-way valve positioner (1212), and a filter (1213) in sequence, wherein the second one-way valve (121) is disposed in the second air inlet passage (12) such that the external air (a) can enter the upper air chamber (21) through the movement of the piston (20).

4. The automatic pressure regulating pneumatic cylinder as claimed in claim 1, wherein the first guide passage (13) comprises: and the third one-way valve (131) is arranged in the first guide channel (13), and the first guide channel (13) is symmetrically arranged opposite to the second air inlet channel (12).