CN210660816U - Buffering self-adaptive adjusting device and hydraulic cylinder with same - Google Patents
Buffering self-adaptive adjusting device and hydraulic cylinder with same Download PDFInfo
- Publication number
- CN210660816U CN210660816U CN201921387307.6U CN201921387307U CN210660816U CN 210660816 U CN210660816 U CN 210660816U CN 201921387307 U CN201921387307 U CN 201921387307U CN 210660816 U CN210660816 U CN 210660816U
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- buffering
- piston
- hole
- throttling
- cylinder
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- 230000003139 buffering effect Effects 0.000 title claims abstract description 106
- 239000003921 oil Substances 0.000 claims abstract description 35
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 29
- 210000004907 gland Anatomy 0.000 claims abstract description 21
- 230000003044 adaptive effect Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 6
- 230000033764 rhythmic process Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
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Abstract
The utility model relates to a buffering self-adaptation adjusting device and pneumatic cylinder that has device, which comprises a spring, piston buffering throttle valve core and gland, spring and piston buffering throttle valve core are installed in the buffering valve opening of pneumatic cylinder, the spring action is in the bottom of buffer piston, promote the orifice that piston buffering throttle valve core kept away from buffering valve opening bottom, enlarge the aperture of the orifice of buffering valve opening bottom, the oil inlet has on the gland, make the hydraulic oil in the hydro-cylinder inner chamber of load drive side get into buffering valve opening, the elasticity that promotes piston buffering throttle valve core and overcome the spring is inwards removed, reduce the aperture of the orifice of buffering valve opening bottom. The beneficial effects are that: the opening degree of the throttling hole of the buffering self-adaptive adjusting device can be adjusted in a self-adaptive mode through hydraulic oil of the hydraulic cylinder, when the load is small, the piston type buffering throttling valve core automatically increases the opening degree of the throttling hole, the buffering speed is increased, and the production rhythm is improved. The whole buffering adjustment process is automatically finished without manual adjustment.
Description
Technical Field
The utility model relates to a pneumatic cylinder technical field, especially a buffering self-adaptation adjusting device and have device's pneumatic cylinder.
Background
The piston and the piston rod of a common hydraulic cylinder have large momentum under the driving of hydraulic pressure. At the stroke end, when the rod head enters the cylinder head and the cylinder bottom of the hydraulic cylinder, mechanical collision can be caused, and great impact is generated. In the buffering process, the buffering ring enters the cylinder head and the cylinder bottom to block a direct return passage of hydraulic oil in the inner cavity of the oil cylinder, and the hydraulic oil in the inner cavity of the oil cylinder can be discharged through the throttling hole through the buffering flow passage only. The valve core structure of the buffer device is directly screwed in the buffer valve hole through threads, and the opening degree of the throttling hole can be manually adjusted through screwing out or screwing in the valve core, so that the buffer pressure is controlled. However, when the damping pressure is adjusted in this control method, the size of the orifice opening is fixed regardless of the load, that is, the damping speed is also fixed. Under the condition that the load changes frequently, the buffering speed cannot change rapidly along with the load, and after the oil cylinder enters the buffering stroke, time is wasted, so that the production rhythm is not accelerated.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the buffering self-adaptive adjusting device and the hydraulic cylinder with the same are provided, so that the buffering speed can be self-adaptively adjusted along with the load.
The utility model provides a technical scheme that its technical problem adopted is: a buffering self-adaptive adjusting device comprises a spring, a piston type buffering throttle valve core and a gland, wherein the spring and the piston type buffering throttle valve core are arranged in a buffering valve hole of a hydraulic cylinder, the piston type buffering throttle valve core comprises a buffering piston and a throttle valve rod arranged at the bottom of the buffering piston, the spring acts on the bottom of the buffering piston to push the piston type buffering throttle valve core to move outwards so as to enable the bottom of the throttle valve rod to be far away from a throttle hole at the bottom of the buffering valve hole, the opening degree of the throttle hole at the bottom of the buffering valve hole is enlarged, the gland blocks an outer port of the buffering valve hole, an oil inlet is arranged on the gland and is communicated with an oil cylinder inner cavity at a load driving side through a pipeline, hydraulic oil in the oil cylinder inner cavity at the load driving side enters the buffering valve hole and acts on the top of the buffering piston to push the piston, the opening degree of the orifice at the bottom of the relief valve hole is reduced.
Specifically, the bottom of the throttle lever and the throttle bore are taper fitted.
Specifically, the gland is installed through the bolt around the gland, and is sealed through the sealing washer between gland and the buffering valve opening.
A hydraulic cylinder comprises the buffering self-adaptive adjusting device.
Specifically, the buffer valve hole is located on the cylinder head or the cylinder bottom, and hydraulic oil in the inner cavity of the oil cylinder enters the buffer valve hole through the buffer flow passage and then is discharged through the throttling hole.
The utility model has the advantages that: the opening degree of the throttling hole of the buffering self-adaptive adjusting device can be adjusted through hydraulic oil of the hydraulic cylinder, the larger the load is, the larger the oil pressure of the hydraulic oil in the hydraulic cylinder is, the smaller the opening degree of the throttling hole is automatically reduced by the piston type buffering throttling valve core, the buffering speed is reduced, the impact on the cylinder head and the cylinder bottom part of the hydraulic cylinder is avoided, when the load is smaller, the smaller the oil pressure of the hydraulic oil in the hydraulic cylinder is, the opening degree of the throttling hole is automatically increased by the piston type buffering throttling valve core, the buffering. The whole buffering adjustment process is automatically finished without manual adjustment.
Drawings
The present invention will be further explained with reference to the drawings and examples;
fig. 1 is a schematic structural diagram of a hydraulic cylinder with a buffering self-adaptive adjusting device according to the present invention;
FIG. 2 is a schematic diagram of the hydraulic cylinder of FIG. 1 during a cushioning process;
FIG. 3 is a schematic structural diagram of the buffering adaptive adjustment apparatus in FIG. 1;
FIG. 4 is a schematic structural diagram of a prior art damping device;
in the figure, 1, a spring, 2, a piston type buffering throttling valve core, 2-1, a buffering piston, 2-2, a throttling valve rod, 3, a gland, 4, a throttling hole, 5, an oil inlet, 6, a sealing ring, 7, a cylinder head, 8, a cylinder bottom, 9, a buffering flow passage, 10, a piston, 11, a rodless cavity oil port, 12, a rodless cavity, 13, a rod cavity oil port, 14, a rod cavity, 15, a buffering sleeve, 16, a pipeline and 17, a valve core structure.
Detailed Description
As shown in fig. 1, 2 and 3, a buffering self-adaptive adjusting device comprises a spring 1, a piston type buffering throttle valve core 2 and a gland 3, wherein the spring 1 and the piston type buffering throttle valve core 2 are installed in a buffering valve hole of a hydraulic cylinder, the piston type buffering throttle valve core 2 comprises a buffering piston 2-1 and a throttle valve rod 2-2 installed at the bottom of the buffering piston 2-1, the spring 1 acts on the bottom of the buffering piston 2-1 to push the piston type buffering throttle valve core 2 to move outwards, so that the bottom of the throttle valve rod 2-2 is far away from a throttle hole 4 at the bottom of the buffering valve hole, the opening degree of the throttle hole 4 at the bottom of the buffering valve hole is enlarged, the gland 3 is blocked at an outer port of the buffering valve hole, an oil inlet 5 is arranged on the gland 3, the oil inlet 5 is communicated with an oil cylinder inner cavity at a load driving side through a pipeline 16, hydraulic oil in the oil cylinder inner, the piston type buffering throttle valve core 2 is pushed to move inwards against the elastic force of the spring 1, so that the bottom of the throttle valve rod 2-2 is close to the throttle hole 4 at the bottom of the buffering valve hole, and the opening degree of the throttle hole 4 at the bottom of the buffering valve hole is reduced. The bottom of the throttle valve rod 2-2 is in taper fit with the throttle hole 4. The gland 3 is installed through bolts around the gland 3, and the buffer piston 2-1, the gland 3 and the buffer valve hole are sealed through a sealing ring 6.
The spring 1 is a cylindrical spiral spring, the buffer valve hole is divided into a piston section with a larger diameter at the upper section and a valve rod section with a smaller diameter at the lower section, the buffer piston 2-1 and the spring 1 are positioned at the piston section, the throttle valve rod 2-1 penetrates through the spring 1 and is inserted into the valve rod section, two ends of the spring 1 are respectively abutted against the bottom of the buffer piston 2-1 and the bottom of the piston section, the buffer flow passage 9 extends to the side surface of the valve rod section from the end part of the cylinder head 7, and the bottom of the valve rod section is communicated with the inner cavity of the oil cylinder through the throttle hole 4.
The buffering self-adaptive adjusting device can be used on the cylinder head 7 or the cylinder bottom 8, buffering requirements when a piston rod extends out and buffering requirements when the piston rod retracts are met, when the buffering self-adaptive adjusting device is used on the cylinder head 7, a buffering valve hole is formed in the cylinder head 7, an oil outlet is formed in the cylinder bottom 8, a pipeline 16 is connected with the oil outlet and an oil inlet 5, a rodless cavity 12 is a load driving side, and hydraulic oil in the rodless cavity 12 enters the buffering valve hole through the oil outlet, the pipeline 16 and the oil inlet 5. Correspondingly, when the buffering self-adaptive adjusting device is used for the cylinder bottom 8, the buffering valve hole is positioned on the cylinder bottom 8, the cylinder head 7 is provided with an oil outlet, a pipeline 16 is connected with the oil outlet and the oil inlet 5, the rod cavity 14 is a load driving side, and hydraulic oil in the rod cavity 14 enters the buffering valve hole through the oil outlet, the pipeline 16 and the oil inlet 5.
The following takes the application of the present buffering adaptive adjusting device to the cylinder head 7 as an example, and the present invention is further explained:
the utility model provides a hydraulic cylinder, includes cylinder end 7 and the cylinder end 8 at cylinder, cylinder both ends, and the piston rod that piston 10 and piston 10 in the cylinder promoted has on cylinder end 7 the utility model discloses a buffering self-adaptation adjusting device. The hydraulic oil in the rod cavity 14 of the cylinder barrel during the buffering process can enter the buffering valve hole through the buffering flow passage 9 and then is discharged through the throttling hole 4.
As shown in fig. 1, when the rodless chamber oil port 11 of the hydraulic cylinder is filled with hydraulic oil, the rodless chamber 12 of the hydraulic cylinder is filled with hydraulic oil, the piston 10 moves to the left, the hydraulic oil in the rod chamber 14 is discharged through the rod chamber oil port 13, when the hydraulic oil does not enter the buffer stroke, the hydraulic oil is discharged through the gap between the piston rod and the cylinder head 7, and the piston type buffer throttle valve core 2 does not work.
As shown in fig. 2 and 3, when the piston rod continues to move to the left, after the cushion sleeve 15 enters the cylinder head 7, because the gap between the two is very small, only about 0.1mm, only a very small amount of hydraulic oil passes through, most of the hydraulic oil passes through the cushion flow channel 9, at this time, the hydraulic oil in the rodless cavity 12 also passes through the pipeline 16 and enters the cushion adaptive adjustment device, under the action of the hydraulic oil in the rodless cavity 12, the position of the piston-type cushion throttle valve core 2 changes, at this time, the gap between the throttle valve rod 2-2 and the throttle orifice 4 changes, the flow rate of the hydraulic oil passing through also changes, and further the cushion speed of the hydraulic cylinder also changes.
When the load is increased, the pressure of hydraulic oil required by the rodless cavity 12 is also increased, the pressure of the hydraulic oil communicated to the buffering adaptive adjusting device through the pipeline 16 is also increased, and after the piston type buffering throttle valve core 2 overcomes the outward elastic force of the spring 1, the inward running distance is larger, the opening degree of the throttle hole 4 is smaller, and the buffering speed is slower.
When the load is reduced, the pressure of hydraulic oil required by the rodless cavity 12 is reduced, the pressure of the hydraulic oil communicated to the buffering self-adaptive adjusting device through the pipeline 16 is reduced, the inward running distance of the piston type buffering throttling valve core 2 after overcoming the outward elastic force of the spring 1 is reduced, the opening degree of the throttling hole 4 is increased, and the buffering speed is increased.
The utility model is suitable for an as servo pneumatic cylinder.
Claims (5)
1. A buffer self-adaptive adjusting device is characterized in that: the hydraulic cylinder comprises a spring (1), a piston type buffering throttling valve core (2) and a gland (3), wherein the spring (1) and the piston type buffering throttling valve core (2) are arranged in a buffering valve hole of a hydraulic cylinder, the piston type buffering throttling valve core (2) comprises a buffering piston (2-1) and a throttling valve rod (2-2) arranged at the bottom of the buffering piston (2-1), the spring (1) acts on the bottom of the buffering piston (2-1) to push the piston type buffering throttling valve core (2) to move outwards, so that the bottom of the throttling valve rod (2-2) is far away from a throttling hole (4) at the bottom of the buffering valve hole, and the opening degree of the throttling hole (4) at the bottom of the buffering valve hole,
the external port of the buffering valve hole is plugged by the gland (3), the gland (3) is provided with an oil inlet (5), the oil inlet (5) is communicated with an oil cylinder inner cavity on the load driving side through a pipeline (16), so that hydraulic oil in the oil cylinder inner cavity on the load driving side enters the buffering valve hole and acts on the top of the buffering piston (2-1), the piston type buffering throttling valve core (2) is pushed to overcome the elastic force of the spring (1) to move inwards, the bottom of the throttling valve rod (2-2) is close to the throttling hole (4) at the bottom of the buffering valve hole, and the opening degree of the throttling hole (4) at the bottom of the buffering valve hole is reduced.
2. The buffering adaptive adjustment device according to claim 1, wherein: the bottom of the throttle valve rod (2-2) is in taper fit with the throttle hole (4).
3. The buffering adaptive adjustment device according to claim 1, wherein: gland (3) install through gland (3) bolt all around, seal through sealing washer (6) between gland (3) and the buffering valve hole.
4. A kind of fluid cylinder, characterized by: comprising a buffered adaptive regulation device according to claim 1.
5. The hydraulic cylinder of claim 4, wherein: the buffer valve hole is positioned on the cylinder head (7) or the cylinder bottom (8), and hydraulic oil in the inner cavity of the oil cylinder enters the buffer valve hole through the buffer flow passage (9) and then is discharged through the throttling hole (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921387307.6U CN210660816U (en) | 2019-08-26 | 2019-08-26 | Buffering self-adaptive adjusting device and hydraulic cylinder with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921387307.6U CN210660816U (en) | 2019-08-26 | 2019-08-26 | Buffering self-adaptive adjusting device and hydraulic cylinder with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210660816U true CN210660816U (en) | 2020-06-02 |
Family
ID=70839172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921387307.6U Expired - Fee Related CN210660816U (en) | 2019-08-26 | 2019-08-26 | Buffering self-adaptive adjusting device and hydraulic cylinder with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210660816U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113007073A (en) * | 2021-02-27 | 2021-06-22 | 北京化工大学 | Variable cross-section hydraulic bidirectional buffer device applied to reciprocating compressor air quantity adjustment |
-
2019
- 2019-08-26 CN CN201921387307.6U patent/CN210660816U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113007073A (en) * | 2021-02-27 | 2021-06-22 | 北京化工大学 | Variable cross-section hydraulic bidirectional buffer device applied to reciprocating compressor air quantity adjustment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200602 |