CN212272715U - Speed-adjustable buffering hydraulic oil cylinder - Google Patents
Speed-adjustable buffering hydraulic oil cylinder Download PDFInfo
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- CN212272715U CN212272715U CN202021405431.3U CN202021405431U CN212272715U CN 212272715 U CN212272715 U CN 212272715U CN 202021405431 U CN202021405431 U CN 202021405431U CN 212272715 U CN212272715 U CN 212272715U
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Abstract
The utility model discloses a but speed regulation buffering hydraulic cylinder respectively establishes a set of oil filler point and oil gallery at the upper and lower oil pocket of cylinder body to set up spring, steel ball, cross the oil head between oil filler point and oil pocket, thereby adjustable oil return volume when piston up-and-down motion reduces piston velocity of motion, plays the effect of buffering, avoids producing impact force and noise, makes whole mechanism steady more reliable in service.
Description
Technical Field
The utility model belongs to the technical field of hydraulic cylinder, concretely relates to adjustable speed buffering hydraulic cylinder.
Background
The hydraulic oil cylinder is an actuating element in a hydraulic transmission system and is an energy conversion device for converting hydraulic energy into mechanical energy. The hydraulic motor performs a continuous rotary motion, while the hydraulic cylinder performs a reciprocating motion. The hydraulic cylinder has three types, including piston cylinder, plunger cylinder and swinging cylinder, and the piston cylinder and the plunger cylinder realize linear reciprocating motion to output speed and thrust and the swinging cylinder realizes reciprocating swinging to output angular speed and torque. The cylinders may be used in combination of two or more or with other mechanisms, other than individually, to accomplish a particular function. The hydraulic cylinder has simple structure and reliable work and is widely applied to a hydraulic system of a machine tool.
In a double-station machine tool adopting end face fluted disc positioning, the rotation transposition can be realized only after the whole rotating part is lifted by using an oil cylinder. Because the rotating part of the double-station machine tool is heavy, if the traditional oil cylinder is adopted to complete lifting work, the phenomena of overlarge oil pressure in the oil cylinder and too high lifting and descending speeds can occur during lifting, and further, the running impact of equipment is large and unstable. Particularly, when the automobile descends, the gravity and the pulling force of the oil cylinder generate great impact force and noise, other related parts can be damaged, and the service life is influenced. The main reason for this phenomenon is that the upper and lower oil cavities of the piston rod of the traditional oil cylinder are respectively provided with a connector, the oil inlet and the oil return are both the same oil way, the structure is too simple, and the adjusting and buffering functions cannot be realized.
Therefore, it is necessary to design a new oil cylinder for the lifting and descending of heavy components, so as to realize adjustable lifting speed and stable operation of the oil cylinder.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a hydraulic cylinder that can realize speed governing and buffering.
The purpose of the utility model is realized through the following technical scheme:
a speed-adjustable buffer hydraulic oil cylinder comprises a base; the base is provided with a plurality of through holes for fixing the base; the base is provided with a limiting part for limiting the position of the base on the machine tool;
the positioning seat is connected above the base, the base and the positioning seat are detachably connected, and the base and the positioning seat jointly form a cylinder body of the oil cylinder;
the piston rod and the piston are in an integral structure; the piston is positioned in the upper cavity of the base; the piston rod vertically penetrates through the positioning seat upwards and extends out of the top surface of the positioning seat; a lower oil cavity is formed between the bottom surface of the piston and the cavity at the upper part of the base, and an upper oil cavity is formed between the top surface of the piston and the bottom surface of the connecting seat;
the base is provided with a first oil hole along the horizontal direction, and a pipe thread for connecting an oil pipe joint is arranged in the first oil hole; a first flow adjusting part is arranged above the first oil hole, a first flow passage and a second flow passage which provide flow passages for hydraulic oil are arranged in the base along the vertical direction, and the first flow passage and the second flow passage are both communicated with the first oil hole and the first flow adjusting part; one end of the first flow channel is communicated with the lower oil cavity, the other end of the first flow channel is a blind end, an oil passing head, a spring and a steel ball which are arranged in the vertical direction are arranged in the first flow channel, the steel ball is positioned at the lower end of the spring, and the oil passing head is positioned at the upper end of the spring; the second flow passage is positioned between the first flow passage and the peripheral wall of the base;
the positioning seat is provided with a second oil hole and a second flow regulating part along the horizontal direction, and the second oil hole is positioned above the second flow regulating part; the axes of the first oil hole, the second oil hole, the first flow regulating part and the second flow regulating part are positioned in the same vertical plane; a pipe thread for connecting an oil pipe joint is arranged in the second oil hole; a third flow passage and a fourth flow passage which provide flow passages for hydraulic oil are arranged in the positioning seat along the vertical direction, and the third flow passage and the fourth flow passage are communicated with the second oil hole and the second flow regulating part; one end of the third flow passage is communicated with the upper oil cavity, the other end of the third flow passage is a blind end, an oil passing head, a spring and a steel ball which are arranged in the vertical direction are arranged in the third flow passage, the steel ball is positioned at the upper end of the spring, and the oil passing head is positioned at the lower end of the spring; the fourth flow channel is positioned between the third flow channel and the peripheral wall of the positioning seat;
the middle part of the piston is provided with a first moving oil seal, and the middle part of the piston rod is provided with a second moving oil seal for sealing the upper oil cavity.
Further, spacing portion is two nonparallel vertical planes of setting on the base periphery wall.
Furthermore, the base is in threaded connection with the positioning seat.
Further, the first flow rate adjusting portion and the second flow rate adjusting portion are both flow rate adjusting valves.
Further, a lower oil injection flow channel for injecting oil is arranged in the base below the first oil hole, the lower oil injection flow channel is communicated with the lower oil cavity, the first flow channel and the second flow channel, and oil plugs are arranged at outlets of all the lower oil injection flow channels.
Further, the device also comprises a positioning pin; the top of base and the below of positioning seat all are equipped with the blind hole that the diameter is the same, and the locating pin realizes quick, preliminary installation location of positioning seat and base through inserting above-mentioned blind hole.
Further, the positioning seat is provided with an upper oil injection flow channel for injecting oil, the upper oil injection flow channel is communicated with the upper oil cavity, the third flow channel and the fourth flow channel, and oil plugs are arranged at outlets of all the upper oil injection flow channels.
Furthermore, the port of the flow regulating valve is provided with a sealing ring to enhance the sealing performance of the oil cylinder.
Furthermore, a sealing ring is arranged on the connecting surface of the positioning seat and the base to enhance the sealing performance of the oil cylinder.
Since the technical scheme is used, the utility model discloses following beneficial effect has:
the utility model discloses an oil cylinder, through the special structural design of business turn over hydraulic fluid port, the starting is fast, and the piston rod atress is steady, can adjust respectively and rise, descend the oil return volume when targetting in place soon to the speed of adjusting the hydro-cylinder lift plays the effect of buffering simultaneously, avoids producing impact force and noise, makes whole mechanism steady more reliable in service, and protection end-toothed disc and other parts do not receive the damage, prolong the life of whole mechanism.
Drawings
The drawings of the utility model are as follows:
FIG. 1 is a schematic diagram of a three-dimensional structure of a speed-adjustable buffering hydraulic oil cylinder;
FIG. 2 is a top view of an adjustable speed cushioning hydraulic ram;
FIG. 3 is a sectional view taken along line A-A;
FIG. 4 is a sectional view taken along line B-B;
FIG. 5 is a cross-sectional view C-C;
FIG. 6 is a schematic illustration of hydraulic oil flow during lift;
fig. 7 is a schematic view of hydraulic oil flow during descent.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Example 1
As shown in fig. 1-5, the adjustable-speed buffer hydraulic oil cylinder of the embodiment comprises a base 1; the base 1 is provided with a plurality of through holes for fixing the base 1; the base 1 is provided with a limiting part for limiting the position of the base 1 on the machine tool;
a positioning seat 2 is connected above the base 1, the base 1 and the positioning seat 2 are detachably connected, and the base 1 and the positioning seat 2 jointly form a cylinder body of the oil cylinder;
the piston 3 is positioned in an upper cavity of the base 1; one end of the piston 3 rod is connected with the piston 3, and the other end of the piston 3 rod vertically penetrates through the positioning seat 2 upwards and extends out of the top surface of the positioning seat 2; a lower oil cavity 18 is formed between the bottom surface of the piston 3 and the upper cavity of the base 1, and an upper oil cavity 19 is formed between the top surface of the piston 3 and the bottom surface of the connecting seat;
the base 1 is provided with a first oil hole 20 and a first flow regulating part 21 along the horizontal direction, the first oil hole 20 is positioned below the first flow regulating part 21, and the first oil hole 20 is provided with pipe threads for connecting an oil injection pipeline; a first flow passage 24 and a second flow passage 25 which provide flow passages for hydraulic oil are arranged in the base 1 along the vertical direction, and the first flow passage 24 and the second flow passage 25 are communicated with the first oil hole 20 and the first flow regulating part 21; one end of the first flow passage is communicated with the lower oil cavity 18, the other end of the first flow passage is a blind end, an oil passing head 5, a spring 7 and a steel ball 6 which are arranged in the vertical direction are arranged in the first flow passage 24, the steel ball 6 is positioned at the lower end of the spring 7, and the oil passing head 5 is positioned at the upper end of the spring 7; the second flow channel 25 is located between the first flow channel 24 and the outer peripheral wall of the base 1;
the positioning seat 2 is provided with a second oil hole 22 and a second flow regulating part 23 along the horizontal direction, the second oil hole 22 is positioned above the second flow regulating part 23, and the second oil hole 22 is provided with pipe threads; a third flow passage 26 and a fourth flow passage 27 which provide flow passages for hydraulic oil are arranged in the positioning seat 2 along the vertical direction, and the third flow passage 26 and the fourth flow passage 27 are both communicated with the second oil hole 22 and the second flow regulating part 23; one end of the third flow passage 26 is communicated with the upper oil cavity 19, the other end of the third flow passage is a blind end, an oil passing head 5, a spring 7 and a steel ball 6 which are arranged in the vertical direction are arranged in the third flow passage 26, the steel ball 6 is positioned at the upper end of the spring 7, and the oil passing head 5 is positioned at the lower end of the spring 7; the fourth flow passage 27 is located between the third flow passage 26 and the outer peripheral wall of the positioning socket 2;
a first moving oil seal 11 is arranged in the middle of the piston 3, and a second moving oil seal 10 is arranged in the middle of the rod of the piston 3 and used for sealing an upper oil cavity 19;
in this embodiment, the first oil hole 20, the first regulating valve 21, the second oil hole 22, and the second regulating valve 23 are located on the same side of the cylinder block, and their axes are parallel to each other and located in the same vertical plane.
In this embodiment, base 1 comprises two cylinders of different diameters, and below cylinder diameter is big, and top cylinder diameter is little, spacing portion is two nonparallel vertical planes for setting up at base 1 below cylinder periphery.
In this embodiment, the base 1 and the positioning seat 2 are connected by a threaded connection, and the hexagon socket head cap screw 9 passes through the positioning seat from top to bottom and then is screwed into the positioning seat and the internal threaded hole on the base, so as to connect the base and the positioning seat, and there are six bolts 9.
In this embodiment, the first flow rate adjusting portion and the second flow rate adjusting portion are both flow rate adjusting valves 4. The front end of the valve core of the flow regulating valve 4 is a section of conical surface and then a section of cylindrical surface, so that inward screwing-in flow is reduced, and screwing-out flow is increased.
In this embodiment, a lower oil injection flow passage 28 for discharging hydraulic oil in the lower oil chamber 18 is provided in the base 1 below the first oil hole 20, the lower oil injection flow passage 28 is communicated with the lower oil chamber 18, the first flow passage 24 and the second flow passage 25, and an oil plug 16 is provided at an outlet of the lower oil injection flow passage 28. The lower oil injection flow passage 28 includes two vertical passages and one horizontal passage, wherein one vertical passage 28a is directly communicated with the lower oil chamber 18, the other vertical passage 28b is communicated with the first flow passage 24 and the second flow passage 25, and the horizontal passage 28c is simultaneously communicated with the two vertical passages.
In this embodiment, a positioning pin 15 is further included; the top of base 1 and the below of positioning seat 2 all are equipped with the same blind hole of diameter, and locating pin 15 realizes positioning seat 2 and base 1 quick, preliminary installation location through inserting above-mentioned blind hole.
In this embodiment, the positioning seat 2 is provided with an upper oil injection flow passage 29 for discharging hydraulic oil in the upper oil chamber 19, the upper oil injection flow passage 29 is communicated with the upper oil chamber 19, the third flow passage 26 and the fourth flow passage 27, and an oil plug 16 is arranged at an outlet of the upper oil injection flow passage 29. The upper oil filling flow passage 29 includes a short horizontal passage 29a, a long horizontal passage 29b, and a vertical passage 29 c. The vertical channel 29c is communicated with the upper oil cavity, and a plug 8 is arranged at the communication position of the vertical channel and the upper oil cavity. A plug 8 is provided at the end of the short horizontal channel 29 a. The long horizontal channel 29b leads to the peripheral wall of the positioning socket 2, and an oil plug 16 is provided at the outer port thereof.
In this embodiment, the 4 ports of the flow control valve are all provided with a sealing ring to enhance the sealing performance of the oil cylinder.
In this embodiment, a circular recess is formed above the base 1, a circular boss is formed below the positioning seat 2, and the recess and the boss are just connected in a matching manner. And a sealing ring is arranged on the connecting surface (comprising an end plane and a circumferential surface) of the positioning seat 2 and the base 1 so as to enhance the sealing property of the oil cylinder.
In the present embodiment, the first and second electrodes are,
before the oil filling device works, the first oil hole and the second oil hole are connected with the oil filling pipeline through respective pipe threads.
When lifting, the first oil hole 20 is filled with oil, and the hydraulic oil flows in two ways: one way can push the steel ball to compress the spring, thereby compressing the oil in the first flow passage 24 to flow to the lower oil chamber 18; the other path enters the lower oil chamber 18 from the lower oil injection flow passage 28 a. Thereby pushing the piston up. The piston ascends to push the hydraulic oil in the upper oil chamber 19 to flow to the third flow passage 26 and the fourth flow passage 27, and the hydraulic oil passes through the second flow regulating valve 4 and then returns to the hydraulic system from the second oil hole 22. The second flow regulating valve 4 can adjust the oil return flow by rotating the regulating knob, so that the ascending speed is controlled, and when the lifting stroke is to be completed, the return flow of hydraulic oil is reduced, so that the ascending resistance of the piston is increased, the ascending speed is slowed down, and the ascending is finally and stably completed.
When the hydraulic oil descends, oil is injected from the second oil hole 22, and due to the existence of the plug 8 at the tail end of the fourth flow passage 27, the hydraulic oil can only enter the upper oil cavity 19 after passing through the steel ball, the spring and the oil head in the third flow passage 26. The piston descends to push hydraulic oil in the lower oil chamber 18 to flow back. Because the steel ball blocks the 24 vertical oil ways
When the steel ball descends, the lower oil cavity returns oil, the steel ball blocks the first flow passage 24, the oil can only return oil through the oil passage of the regulating valve 25, and the flow is controlled through the regulating valve, so that the descending speed is controlled, and the buffering effect (high first and low second) is achieved. Specifically, the oil return amount is large in the initial stage, and the descending speed of the piston is high; when the descending stroke is to be completed, the return flow of the hydraulic oil is reduced, so that the descending resistance of the piston is increased, the descending speed of the piston is reduced, the buffering is realized, and the descending stroke is completed stably.
Since the technical scheme is used, the utility model discloses following beneficial effect has:
the utility model discloses an oil cylinder, through the special structural design of business turn over hydraulic fluid port, the starting is fast, and the piston rod atress is steady, can adjust respectively and rise, descend the oil return volume when targetting in place soon to the speed of adjusting the hydro-cylinder lift plays the effect of buffering simultaneously, avoids producing impact force and noise, makes whole mechanism steady more reliable in service, and protection end-toothed disc and other parts do not receive the damage, prolong the life of whole mechanism.
Finally, it is noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions, which should be covered by the protection scope of the present invention.
Claims (9)
1. The utility model provides an adjustable speed buffering hydraulic cylinder which characterized in that: comprises a base; the base is provided with a plurality of through holes for fixing the base;
the base is provided with a limiting part for limiting the position of the base on the machine tool;
the positioning seat is connected above the base, the base and the positioning seat are detachably connected, and the base and the positioning seat jointly form a cylinder body of the oil cylinder;
the piston rod and the piston are in an integral structure; the piston is positioned in the upper cavity of the base; the piston rod vertically penetrates through the positioning seat upwards and extends out of the top surface of the positioning seat; a lower oil cavity is formed between the bottom surface of the piston and the cavity at the upper part of the base, and an upper oil cavity is formed between the top surface of the piston and the bottom surface of the connecting seat;
the base is provided with a first oil hole along the horizontal direction, and a pipe thread for connecting an oil pipe joint is arranged in the first oil hole; a first flow adjusting part is arranged above the first oil hole, a first flow passage and a second flow passage which provide flow passages for hydraulic oil are arranged in the base along the vertical direction, and the first flow passage and the second flow passage are both communicated with the first oil hole and the first flow adjusting part; one end of the first flow channel is communicated with the lower oil cavity, the other end of the first flow channel is a blind end, an oil passing head, a spring and a steel ball which are arranged in the vertical direction are arranged in the first flow channel, the steel ball is positioned at the lower end of the spring, and the oil passing head is positioned at the upper end of the spring; the second flow passage is positioned between the first flow passage and the peripheral wall of the base;
the positioning seat is provided with a second oil hole and a second flow regulating part along the horizontal direction, and the second oil hole is positioned above the second flow regulating part; the axes of the first oil hole, the second oil hole, the first flow regulating part and the second flow regulating part are positioned in the same vertical plane; a pipe thread for connecting an oil pipe joint is arranged in the second oil hole; a third flow passage and a fourth flow passage which provide flow passages for hydraulic oil are arranged in the positioning seat along the vertical direction, and the third flow passage and the fourth flow passage are communicated with the second oil hole and the second flow regulating part; one end of the third flow passage is communicated with the upper oil cavity, the other end of the third flow passage is a blind end, an oil passing head, a spring and a steel ball which are arranged in the vertical direction are arranged in the third flow passage, the steel ball is positioned at the upper end of the spring, and the oil passing head is positioned at the lower end of the spring; the fourth flow channel is positioned between the third flow channel and the peripheral wall of the positioning seat;
the middle part of the piston is provided with a first moving oil seal, and the middle part of the piston rod is provided with a second moving oil seal for sealing the upper oil cavity.
2. The cylinder of claim 1, wherein: the limiting part is two nonparallel vertical planes arranged on the peripheral wall of the base.
3. The cylinder of claim 1, wherein: the base is in threaded connection with the positioning seat.
4. The cylinder of claim 1, wherein: the first flow regulating part and the second flow regulating part are both flow regulating valves.
5. The cylinder of claim 1, wherein: and a lower oil injection flow channel for injecting oil is arranged in the base below the first oil hole, the lower oil injection flow channel is communicated with the lower oil cavity, the first flow channel and the second flow channel, and oil plugs are arranged at outlets of all the lower oil injection flow channels.
6. The cylinder of claim 1, wherein: the device also comprises a positioning pin; the top of base and the below of positioning seat all are equipped with the blind hole that the diameter is the same, and the locating pin realizes quick, preliminary installation location of positioning seat and base through inserting above-mentioned blind hole.
7. The cylinder of claim 1, wherein: the positioning seat is provided with an upper oil injection flow channel for injecting oil, the upper oil injection flow channel is communicated with the upper oil cavity, the third flow channel and the fourth flow channel, and oil plugs are arranged at outlets of all the upper oil injection flow channels.
8. The cylinder of claim 4, wherein: and sealing rings are arranged at the ports of the flow regulating valves to enhance the sealing property of the oil cylinder.
9. The cylinder of claim 1, wherein: and a sealing ring is arranged on the connecting surface of the positioning seat and the base to enhance the sealing property of the oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021405431.3U CN212272715U (en) | 2020-07-16 | 2020-07-16 | Speed-adjustable buffering hydraulic oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021405431.3U CN212272715U (en) | 2020-07-16 | 2020-07-16 | Speed-adjustable buffering hydraulic oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212272715U true CN212272715U (en) | 2021-01-01 |
Family
ID=73898618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021405431.3U Active CN212272715U (en) | 2020-07-16 | 2020-07-16 | Speed-adjustable buffering hydraulic oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212272715U (en) |
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2020
- 2020-07-16 CN CN202021405431.3U patent/CN212272715U/en active Active
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