CN213451107U - Adjustable one-way throttle valve device for stroke end buffering structure of hydraulic cylinder - Google Patents
Adjustable one-way throttle valve device for stroke end buffering structure of hydraulic cylinder Download PDFInfo
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- CN213451107U CN213451107U CN202022333658.8U CN202022333658U CN213451107U CN 213451107 U CN213451107 U CN 213451107U CN 202022333658 U CN202022333658 U CN 202022333658U CN 213451107 U CN213451107 U CN 213451107U
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Abstract
The utility model relates to an adjustable one-way throttle valve device for a hydraulic cylinder stroke end buffering structure in the technical field of hydraulic devices, which comprises a main body block, wherein the main body block is provided with a buffering side inner cavity interface and a buffering side inlet and outlet oil interface which are vertically crossed, and is also provided with an installation cavity channel which is coaxially connected with the buffering side inlet and outlet oil interface and is connected with the buffering side inner cavity interface, and the buffering side inner cavity interface and the buffering side inlet and outlet oil interface are respectively communicated with a buffering side inner cavity and a buffering side inlet and outlet oil port of a hydraulic cylinder; a one-way valve, a spring, a valve rod and a main nut are inserted in the mounting cavity; when the hydraulic cylinder is in a buffering state, the buffer side inner cavity interface, the radial channel, the axial channel and the buffer side oil inlet and outlet interface are sequentially communicated to form a buffer oil way; when the hydraulic cylinder is in a buffering reverse opening state, the buffering side oil inlet and outlet port, the mounting cavity channel and the buffering side inner cavity port are sequentially communicated to form a buffering reverse oil way. So as to realize the linear adjustment of the buffering effect of the hydraulic cylinder.
Description
Technical Field
The utility model relates to a hydraulic means technical field is, particularly, is an one-way throttle device with adjustable be used for terminal buffer structure of pneumatic cylinder stroke.
Background
The buffer structure is generally applied to a hydraulic cylinder or an air cylinder which runs at a high speed and has large load dynamic inertia, is used for relieving the impact when a piston runs to two ends of a stroke, gradually converts the kinetic energy of the load into hydraulic energy in the buffer stroke and then slowly releases the hydraulic energy so as to achieve the purpose of stable running of a system. However, in specific applications, because the working conditions are different, the load dynamic inertia is also different, and it is difficult to realize a good buffering effect under different working conditions through a fixed buffering structure.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an adjustable one-way throttle device for terminal buffer structure of pneumatic cylinder stroke to realize the linear regulation of pneumatic cylinder buffering effect.
The purpose of the utility model is realized like this: the adjustable one-way throttle valve device comprises a main body block, wherein a buffering side inner cavity interface and a buffering side inlet and outlet oil interface which are vertically crossed are arranged on the main body block, and an installation cavity channel which is coaxially connected with the buffering side inlet and outlet oil interface and is connected with the buffering side inner cavity interface is also arranged on the main body block;
the mounting cavity is internally inserted with a one-way valve, a spring, a valve rod and a main nut, the main nut is inserted into the mounting cavity and blocks an outer opening of the mounting cavity, the main nut is provided with an inner threaded hole, the valve rod is axially and adjustably inserted into the inner threaded hole of the main nut in a threaded fit manner, the outer side end of the valve rod is positioned outside the main body block, and the valve rod is provided with a shaft shoulder positioned in the mounting cavity;
the check valve is arranged in a revolving body structure, the spring is sleeved on the valve rod, one end of the spring props against a shaft shoulder of the valve rod, and the other end of the spring props against one shaft end of the check valve, so that the other shaft end of the check valve is sealed with the buffer side-in and oil-out port when the hydraulic cylinder is in a buffer state;
the check valve is provided with a radial channel which penetrates through the check valve along the diameter direction of the check valve, the radial channel is communicated with the interface of the inner cavity at the buffering side, the check valve is provided with an axial channel which penetrates through the check valve along the axial direction of the check valve, the axial channel is intersected with the radial channel, and the inner side end of the valve rod movably penetrates through the axial channel of the check valve;
when the hydraulic cylinder is in a buffering state, the buffer side inner cavity interface, the radial channel, the axial channel and the buffer side oil inlet and outlet interface are sequentially communicated to form a buffer oil way;
when the hydraulic cylinder is in a buffering reverse opening state, the buffering side oil inlet and outlet port, the mounting cavity channel and the buffering side inner cavity port are sequentially communicated to form a buffering reverse oil way.
Furthermore, the shaft end of the sealing buffer side-in oil-out interface of the one-way valve is arranged to be in a cone frustum structure, and the small end of the cone frustum structure faces the buffer side-in oil-out interface.
Further, the shaft end cone frustum structure of the one-way valve is a structure subjected to surface hardening treatment.
Further, when the hydraulic cylinder is in a buffering state and in a maximum throttling state, the valve rod penetrates through the radial channel, and a fit clearance between the valve rod and the axial channel forms an oil channel communicating the radial channel and the axial channel.
Further, when the hydraulic cylinder is in a buffering state, in a minimum throttling state, the inner side end of the valve rod completely leaves the radial channel so that the radial channel and the axial channel are completely communicated.
Furthermore, the main nut is arranged to be a round sleeve structure with an external thread, the external thread of the main nut is screwed into the installation cavity channel, and a first O-shaped ring is sleeved on an annular fit clearance between the outer wall of the main nut and the installation cavity channel.
Furthermore, a second O-shaped ring is coaxially sleeved on the valve rod and arranged in a fit clearance between the inner wall of the main nut and the valve rod.
Furthermore, the exposed part of the valve rod is of a stud structure, a locking nut and a shaft elastic check ring are sleeved on the exposed part of the valve rod, and the locking nut is positioned between the shaft elastic check ring and the main nut.
The beneficial effects of the utility model reside in that:
1. the valve rod can be screwed in a thread matching mode so as to control the axial position of the valve rod and further control the specific position of the inner side end of the valve rod, so that the hydraulic oil flow can be linearly adjusted when the hydraulic cylinder is in a buffering state, namely, the axial length variation of the valve rod and the hydraulic oil flow in the buffering state are in a linear relation;
2. when the hydraulic cylinder is in a buffering reverse opening state, the check valve is jacked open under the action of oil pressure, so that the buffering side oil inlet and outlet port, the mounting cavity channel and the buffering side inner cavity port are sequentially communicated to form a buffering reverse oil way, and the hydraulic cylinder is convenient to use normally;
3. because the shaft end cone frustum structure of the one-way valve is set to be a structure subjected to surface hardening treatment, the structural strength is ensured, and the shaft end cone frustum structure of the one-way valve is better adapted to the working condition of the interface of the inner cavity of the continuous impact buffering side.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the through-flow effect of the present invention when the buffer is in the maximum throttling state.
Fig. 3 is a schematic view of the through-flow effect when the buffer of the present invention is in the minimum throttle state.
Fig. 4 is a schematic view of the through-flow effect of the present invention when the buffer is opened in the reverse direction.
Fig. 5 is a schematic diagram of a hydraulic circuit when the present invention is applied.
In the figure, 1, a valve rod, 2, a main nut, 3, a spring, 4, a one-way valve, 4a radial passage, 4b axial passage, 11, an elastic retainer ring for a shaft, 12, a locking nut, 13, a first O-shaped ring, 14, a second O-shaped ring, 21, a buffer side inner cavity interface, and 22, a buffer side oil inlet and outlet interface.
Detailed Description
The invention will be further described with reference to the accompanying figures 1-5 and the specific embodiments.
As shown in fig. 1 and 5, the adjustable one-way throttle valve device for the stroke end buffering structure of the hydraulic cylinder comprises a main body block, wherein a buffering side inner cavity interface 21 and a buffering side oil inlet and outlet interface 22 which are vertically crossed are arranged on the main body block, an installation cavity channel which is coaxially connected with the buffering side oil inlet and outlet interface 22 and is connected with the buffering side inner cavity interface 21 is further arranged, and the buffering side inner cavity interface 21 and the buffering side oil inlet and outlet interface 22 are respectively communicated with a buffering side inner cavity and a buffering side oil inlet and outlet of the hydraulic cylinder.
The check valve 4, the spring 3, the valve rod 1 and the main nut 2 are inserted into the installation cavity, the main nut 2 is inserted into the installation cavity and blocks an outer opening of the installation cavity, the main nut 2 is provided with an inner threaded hole, the valve rod 1 is inserted into the inner threaded hole of the main nut 2 in an axially adjustable mode in a threaded fit mode, the outer end of the valve rod 1 is located outside the main body block, a groove or a screw head is arranged at the outer end of the valve rod 1, so that the valve rod 1 can be screwed out or in by using special tools (such as a screwdriver and a wrench), and the valve rod 1 is provided with a shaft shoulder located in the installation cavity.
Above-mentioned check valve 4 sets up to the solid of revolution structure, and 3 suits of spring are on valve rod 1, and 3 one end of spring are contradicted the shaft shoulder of valve rod 1, and the 3 other ends of spring are contradicted one axle head of check valve 4 to make another axle head of check valve 4 paste when the pneumatic cylinder is in buffer state and seal buffering side in and go out oil connector 22.
The check valve 4 is provided with a radial channel 4a penetrating through the diameter direction of the check valve 4, the radial channel 4a is communicated with the buffer side inner cavity interface 21, the check valve 4 is provided with an axial channel 4b penetrating through the axial direction of the check valve 4, the axial channel 4b is intersected with the radial channel 4a, and the inner side end of the valve rod 1 movably penetrates through the axial channel 4b of the check valve 4.
When the hydraulic cylinder is in a buffering state, the buffer side inner cavity interface 21, the radial channel 4a, the axial channel 4b and the buffer side oil inlet and outlet interface 22 are communicated in sequence to form a buffer oil way; when the hydraulic cylinder is in a buffering state, as shown in fig. 2, in a maximum throttling state, the valve rod 1 penetrates through the radial passage 4a, and a fit clearance between the valve rod 1 and the axial passage 4b forms an oil passage which is communicated with the radial passage 4a and the axial passage 4 b; when the hydraulic cylinder is in a cushioning state, as shown in fig. 3, in a minimum throttle state, the inner end of the valve rod 1 completely leaves the radial passage 4a to completely open the radial passage 4a and the axial passage 4 b. The axial position of the valve stem 1 is controlled by screwing the valve stem 1 in order to switch between the states shown in fig. 2-3.
As shown in fig. 4, when the hydraulic cylinder is in the buffering reverse opening state, the buffering side oil inlet and outlet port 22, the mounting channel, and the buffering side inner cavity port 21 are sequentially communicated to form a buffering reverse oil path.
As shown in fig. 1, the shaft end of the sealing buffer side oil inlet/outlet port 22 of the check valve 4 is configured to be a truncated cone structure, and the small end of the truncated cone structure faces the buffer side oil inlet/outlet port 22; the shaft end cone frustum structure of the check valve 4 is a surface-hardened structure.
In order to ensure the sealing property, the main nut 2 is provided with a round sleeve structure with an external thread, the external thread of the main nut 2 is screwed into the installation cavity channel, and a first O-shaped ring 13 is sleeved in an annular fit clearance between the outer wall of the main nut 2 and the installation cavity channel; the valve rod 1 is coaxially sleeved with a second O-shaped ring 14, and the second O-shaped ring 14 is arranged in a matching gap between the inner wall of the main nut 2 and the valve rod 1.
The exposed part of the valve rod 1 is of a stud structure, a locking nut 12 and a shaft elastic check ring 11 are sleeved on the exposed part of the valve rod 1, the locking nut 12 is located between the shaft elastic check ring 11 and the main nut 2, and the shaft elastic check ring 11 plays a final limiting role so as to control the maximum axial length of the valve rod 1 extending into the installation cavity.
The above are preferred embodiments of the present invention, and those skilled in the art can make various changes or improvements on the above embodiments without departing from the general concept of the present invention, and such changes or improvements should fall within the protection scope of the present invention.
Claims (8)
1. The adjustable one-way throttle valve device is characterized by comprising a main body block, wherein the main body block is provided with a buffering side inner cavity interface (21) and a buffering side oil inlet and outlet interface (22) which are vertically crossed, and is also provided with an installation cavity channel which is coaxially connected with the buffering side oil inlet and outlet interface (22) and is connected with the buffering side inner cavity interface (21), and the buffering side inner cavity interface (21) and the buffering side oil inlet and outlet interface (22) are respectively communicated with a buffering side inner cavity and a buffering side oil inlet and outlet of a hydraulic cylinder;
the check valve (4), the spring (3), the valve rod (1) and the main nut (2) are inserted into the mounting cavity, the main nut (2) is inserted into the mounting cavity and blocks an outer opening of the mounting cavity, the main nut (2) is provided with an inner threaded hole, the valve rod (1) is axially and adjustably inserted into the inner threaded hole of the main nut (2) in a threaded fit manner, the outer end of the valve rod (1) is positioned outside the main body block, and the valve rod (1) is provided with a shaft shoulder positioned in the mounting cavity;
the check valve (4) is arranged in a revolving body structure, the spring (3) is sleeved on the valve rod (1), one end of the spring (3) abuts against a shaft shoulder of the valve rod (1), and the other end of the spring (3) abuts against one shaft end of the check valve (4), so that the other shaft end of the check valve (4) is in close contact with the buffer side-in and side-out oil port (22) when the hydraulic cylinder is in a buffer state;
the check valve (4) is provided with a radial channel (4a) which penetrates through the check valve in the diameter direction, the radial channel (4a) is communicated with an inner cavity interface (21) at the buffering side, the check valve (4) is provided with an axial channel (4b) which penetrates through the check valve in the axial direction, the axial channel (4b) is intersected with the radial channel (4a), and the inner side end of the valve rod (1) movably penetrates through the axial channel (4b) of the check valve (4);
when the hydraulic cylinder is in a buffering state, the buffering side inner cavity interface (21), the radial channel (4a), the axial channel (4b) and the buffering side oil inlet and outlet interface (22) are communicated in sequence to form a buffering oil way;
when the hydraulic cylinder is in a buffering reverse opening state, the buffering side oil inlet and outlet port (22), the mounting cavity channel and the buffering side inner cavity port (21) are sequentially communicated to form a buffering reverse oil way.
2. The adjustable check throttle device for an end-of-stroke cushion structure of a hydraulic cylinder as set forth in claim 1, wherein: the shaft end of the sealing buffer side-in oil-out interface (22) of the one-way valve (4) is of a truncated cone structure, and the small end of the truncated cone structure faces the buffer side-in oil-out interface (22).
3. The adjustable check throttle device for an end-of-stroke cushion structure of a hydraulic cylinder as set forth in claim 2, wherein: and the shaft end cone frustum structure of the one-way valve (4) is a structure subjected to surface hardening treatment.
4. The adjustable check throttle device for an end-of-stroke cushion structure of a hydraulic cylinder as set forth in claim 1, wherein: when the hydraulic cylinder is in a buffering state and in a maximum throttling state, the valve rod (1) penetrates through the radial channel (4a), and a fit clearance between the valve rod (1) and the axial channel (4b) forms an oil channel which is communicated with the radial channel (4a) and the axial channel (4 b).
5. The adjustable check throttle device for an end-of-stroke cushion structure of a hydraulic cylinder as set forth in claim 1, wherein: when the hydraulic cylinder is in a buffering state, in a minimum throttling state, the inner side end of the valve rod (1) completely leaves the radial passage (4a) to completely connect the radial passage (4a) and the axial passage (4 b).
6. The adjustable check throttle device for an end-of-stroke cushion structure of a hydraulic cylinder as set forth in claim 1, wherein: the main nut (2) is arranged to be of a round sleeve structure with an external thread, the external thread of the main nut (2) is screwed into the installation cavity channel, and a first O-shaped ring (13) is sleeved on an annular fit clearance between the outer wall of the main nut (2) and the installation cavity channel.
7. The adjustable check throttle device for an end-of-stroke cushion structure of a hydraulic cylinder as set forth in claim 6, wherein: a second O-shaped ring (14) is coaxially sleeved on the valve rod (1), and the second O-shaped ring (14) is arranged in a fit clearance between the inner wall of the main nut (2) and the valve rod (1).
8. The adjustable check throttle device for an end-of-stroke cushion structure of a hydraulic cylinder as set forth in claim 1, wherein: the exposed part of the valve rod (1) is of a stud structure, a locking nut (12) and a shaft elastic check ring (11) are sleeved on the exposed part of the valve rod (1), and the locking nut (12) is arranged between the shaft elastic check ring (11) and the main nut (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022333658.8U CN213451107U (en) | 2020-10-20 | 2020-10-20 | Adjustable one-way throttle valve device for stroke end buffering structure of hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022333658.8U CN213451107U (en) | 2020-10-20 | 2020-10-20 | Adjustable one-way throttle valve device for stroke end buffering structure of hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213451107U true CN213451107U (en) | 2021-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022333658.8U Active CN213451107U (en) | 2020-10-20 | 2020-10-20 | Adjustable one-way throttle valve device for stroke end buffering structure of hydraulic cylinder |
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| Country | Link |
|---|---|
| CN (1) | CN213451107U (en) |
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2020
- 2020-10-20 CN CN202022333658.8U patent/CN213451107U/en active Active
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