CN214007656U - Small-sized oil cylinder - Google Patents
Small-sized oil cylinder Download PDFInfo
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- CN214007656U CN214007656U CN202022774358.3U CN202022774358U CN214007656U CN 214007656 U CN214007656 U CN 214007656U CN 202022774358 U CN202022774358 U CN 202022774358U CN 214007656 U CN214007656 U CN 214007656U
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Abstract
The utility model discloses a small-size hydro-cylinder, include: the piston is arranged in the cylinder barrel and is in sliding fit with the cylinder barrel, and the piston rod is connected with the piston; one end of the cylinder barrel is connected with a cylinder bottom, and the other end of the cylinder barrel is matched and connected with a guide sleeve; a rodless cavity is formed between the piston and the cylinder bottom, and a rod cavity is formed between the piston and the guide sleeve; wherein the piston rod is provided with a hollow middle shaft hole; the cylinder bottom is matched with a sensor, and a detection part of the sensor is suitable for penetrating through the cylinder bottom from the outer side of the cylinder bottom, then being inserted into the cylinder barrel and then extending into the middle shaft hole; the piston is provided with a through hole communicated with the middle shaft hole; one end of the piston facing the rodless cavity is matched with an annular magnetic ring which is suitable for a detection part of the sensor to penetrate through; the end part of the piston facing the rodless cavity is also matched and connected with a buffer column; and a hollow shaft hole which is suitable for the detection part of the sensor to pass through and is coaxial with the through hole is also formed in the buffer column. The utility model discloses the structure that has buffering and the hydro-cylinder of taking the sensor simultaneously can be simplified.
Description
Technical Field
The utility model relates to a hydraulic cylinder technical field especially relates to a small-size hydro-cylinder.
Background
When a buffer and a sensor are added to the micro-cylinder. The buffer column is small, the size of the magnetic ring is fixed, and the magnetic ring is difficult to mount on the buffer. At present, the conventional structure can only ensure that the inside of the oil cylinder is provided with a buffer structure, the sensor is installed in an external structure, or the sensor is arranged in the conventional structure, and the buffer is controlled by a hydraulic system to control the flow of oil liquid so as to control the running speed of the oil cylinder. That is, in the oil cylinder in the prior art, it is a technical difficulty to be overcome that the oil cylinder can be designed to have a buffer and a structure with a sensor at the same time. Most of the oil cylinder structures with the buffering and sensor structures in the prior art have the problems of complex structure, inconvenience in assembly and difficulty in maintenance after assembly.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a small-size hydro-cylinder to solve and simplify the structural technical problem who has buffering and the hydro-cylinder of taking the sensor simultaneously.
The utility model discloses a small-size hydro-cylinder realizes like this:
a compact cylinder comprising: the piston is arranged in the cylinder barrel and is in sliding fit with the cylinder barrel, and the piston rod is connected with the piston;
one end of the cylinder barrel is connected with a cylinder bottom, and the other end of the cylinder barrel is matched and connected with a guide sleeve; a rodless cavity is formed between the piston and the cylinder bottom, and a rod cavity is formed between the piston and the guide sleeve; wherein
The piston rod is provided with a hollow middle shaft hole;
the cylinder bottom is matched and connected with a sensor, and a detection part of the sensor is suitable for penetrating through the cylinder bottom from the outer side of the cylinder bottom, then being inserted into the cylinder barrel and then extending into the middle shaft hole; the piston is provided with a through hole communicated with the middle shaft hole;
one end of the piston, which faces the rodless cavity, is matched with an annular magnetic ring which is suitable for a detection part of the sensor to penetrate through; and
the end part of the piston facing the rodless cavity is also matched and connected with a buffer column; and a hollow shaft hole which is suitable for the detection part of the sensor to pass through and is coaxial with the through hole is also formed in the buffer column.
In a preferred embodiment of the present invention, a recessed cavity is further concavely formed around the through hole at the end of the piston facing the rodless cavity; and
the magnetic ring is assembled in the concave cavity.
In the preferred embodiment of the present invention, the magnetic ring is fixed to the cavity bottom of the recessed cavity by a first screw.
In a preferred embodiment of the present invention, an accommodating cavity coaxial with the through hole is concavely arranged at the end part of the cylinder bottom facing to the rodless cavity;
the buffer column comprises a columnar body suitable for being inserted into the accommodating cavity and a connecting part connected with one end of the columnar body; wherein
The connecting part comprises a matching end matched and connected with the end part of the rodless cavity of the piston and a connecting end which is integrally connected with the matching end and is embedded into the concave cavity to be matched with the cavity wall of the concave cavity in a sealing mode.
In a preferred embodiment of the present invention, the coupling end is coupled to the end of the rodless chamber of the piston by a second screw.
In a preferred embodiment of the present invention, a counter bore communicated with the accommodating cavity is further concavely provided at the end of the cylinder bottom facing the rodless cavity;
a floating annular buffer sheet is embedded in the counter bore.
In a preferred embodiment of the present invention, the inner hole edge of the floating ring buffer plate is adapted to contact with the buffer post.
In a preferred embodiment of the present invention, an L-shaped step is disposed at one end of the floating ring-shaped buffer plate facing the piston;
the L-shaped step is suitable for being abutted against an elastic check ring; and
the outer circumferential edge of the elastic check ring is embedded into the side wall of the counter bore, so that the two axial ends of the floating annular buffer sheet are limited between the counter bore and the elastic check ring.
In the preferred embodiment of the present invention, the sensor is fixed to the cylinder bottom by screwing.
In a preferred embodiment of the present invention, the cylinder bottom and the cylinder barrel are fixed by screw threads.
By adopting the technical scheme, the utility model discloses following beneficial effect has: the utility model discloses a small-size hydro-cylinder adopts sensor and magnetic ring to detect the displacement for relative displacement takes place for the detection portion of sensor and magnetic ring when the hydro-cylinder is flexible, produces the signal change of sensor, thereby the accurate stroke that detects out the hydro-cylinder, and the detection portion and the magnetic ring of sensor all set up in the cylinder of hydro-cylinder. And a buffering column is arranged in the cylinder barrel of the oil cylinder, and the work of the detection part of the sensor, the magnetic ring and the buffering column is not influenced by each other through reasonable design of the positions and the assembly modes of the detection part, the magnetic ring and the buffering column.
Drawings
Fig. 1 is a schematic view of the overall structure of the small-sized oil cylinder of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
fig. 3 is a schematic view of the structure of the small oil cylinder of the present invention, which is a matching structure of the buffer column, the magnetic ring and the piston;
fig. 4 is a schematic view of the matching structure between the floating ring buffer plate and the bottom of the small-sized oil cylinder.
In the figure: the cylinder barrel 1, the piston 2, the through hole 21, the sunken cavity 23, the piston rod 3, the center shaft hole 31, the cylinder bottom 5, the accommodating cavity 51, the counter bore 52, the guide sleeve 6, the sensor 7, the detecting part 71, the magnetic ring 8, the columnar body 91, the adapting end 92, the adapting end 93, the hollow shaft hole 95, the first screw 101, the second screw 102, the floating annular buffer sheet 105 and the elastic check ring 106.
Detailed Description
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings.
Example 1:
referring to fig. 1 to 3, the present embodiment provides a small oil cylinder, including: the piston type cylinder comprises a cylinder barrel 1, a piston 2 arranged in the cylinder barrel 1 and in sliding fit with the cylinder barrel 1, and a piston rod 3 connected with the piston 2; one end of the cylinder barrel 1 is connected with a cylinder bottom 5, and the other end of the cylinder barrel 1 is connected with a guide sleeve 6 in a matching way; a rodless cavity is formed between the piston 2 and the cylinder bottom 5, and a rod cavity is formed between the piston 2 and the guide sleeve 6.
Considering the convenience of the assembly of the integral oil cylinder, the cylinder bottom 5 and the cylinder barrel 1 of the embodiment are fixedly connected through threads in a matching mode, specifically, the inner wall of the cylinder barrel 1 is provided with an internal thread structure, a part of the cylinder bottom 5 can be embedded into the cylinder barrel 1, and the outer side wall of the part, suitable for being embedded into the cylinder barrel 1, of the cylinder bottom 5 is provided with an external thread structure. Of course, the present embodiment considers the sealing performance of the mating of the cylinder tube 1 and the cylinder bottom 5, and the present embodiment further provides a corresponding sealing structure, such as but not limited to a sealing ring, at the mating position of the two.
In the piston rod 3 of the present embodiment, the piston rod 3 has a hollow center shaft hole 31; the open end of the center shaft hole 31 faces the rodless chamber, i.e., the center shaft hole 31 extends from the rodless chamber end to the direction of the rod chamber.
In addition, the cylinder bottom 5 of the present embodiment is coupled with the sensor 7, and the detecting portion 71 of the sensor 7 is adapted to penetrate the cylinder bottom 5 from the outside of the cylinder bottom 5, to be inserted into the cylinder tube 1, and to be inserted into the center shaft hole 31. Specifically, the sensor 7 and the cylinder bottom 5 are fixed in a matching manner through threads, that is, the base body of the sensor 7 and the cylinder bottom 5 are fixed in a matching manner, so that the detection part 71 of the sensor 7 is driven to penetrate through the cylinder bottom 5 and then enter the cylinder barrel 1 in the process that the base body of the sensor 7 penetrates through the cylinder bottom 5. The sensor 7 of the present embodiment is a position sensor 7.
The piston rod 3 and the piston 2 of the present embodiment may be assembled separately or integrally. However, regardless of the configurations of the piston rod 3 and the piston 2, the piston 2 of the present embodiment is provided with a through hole 21 penetrating the center axis hole 31, and the through hole 21 is adapted to allow the detection portion 71 of the sensor 7 to pass therethrough.
In this embodiment, a magnetic ring 8 is used in cooperation with the position sensor 7, specifically, the end of the piston 2 facing the rodless cavity is coupled with the magnetic ring 8 through which the detection part 71 of the sensor 7 passes; when the oil cylinder stretches, the detection part 71 of the sensor 7 and the magnetic ring 8 generate relative displacement, and signal change of the sensor 7 is generated, so that the stroke of the oil cylinder is accurately detected.
The magnetic ring 8 and the piston 2 of the present embodiment are specifically connected by the following structure, a concave cavity 23 is concavely provided around the through hole 21 at the end of the piston 2 facing the rodless cavity; and the magnetic ring 8 is fitted in the recessed cavity 23. The magnetic ring 8 is fixed to the bottom of the recess 23 by a first screw 101. Under such structure, not only be convenient for magnetic ring 8 and piston 2 assemble, also be convenient for dismantle.
On the basis of the structure, the oil cylinder of the embodiment also has a buffering effect, and particularly, a buffering column is matched and connected at the end part, facing the rodless cavity, of the piston 2; and a hollow shaft hole 95 which is suitable for the detection part 71 of the sensor 7 to pass through and is coaxial with the through hole 21 is also formed on the buffer column. In this way, the hollow shaft hole 95 is engaged with the detecting portion 71 of the sensor 7 so that the detection of the sensor 7 and the use of the bumper do not interfere with each other, and the respective effects can be performed independently of each other.
The cushion post of the present embodiment is specifically assembled into the cylinder tube 1 by a structure in which, in detail, the end of the cylinder bottom 5 facing the rodless chamber is concavely provided with an accommodating chamber 51 coaxial with the through hole 21; here, it should be further noted that a through hole is further formed in the cylinder bottom 5 so as to be coaxial with the through hole 21 and adapted to pass the detection portion 71 of the sensor 7 therethrough. The cushion column includes a column-shaped body 91 adapted to be inserted into the accommodating chamber 51, and a connecting portion connected to one end of the column-shaped body 91; and a hollow shaft hole 95 penetrates the columnar body 91 and the connecting portion. Specifically, the connecting portion includes a mating end 92 that mates with an end of the rodless chamber of the piston 2, and an engaging end 93 integrally connected to the mating end 92 to be inserted into the recessed chamber 23 to sealingly engage with a chamber wall of the recessed chamber 23. In this alternative embodiment, the coupling end 92 is coupled to the end of the rodless chamber of the piston 2 by a second screw 102, the second screw 102 being coupled in such a way as to facilitate not only assembly but also disassembly.
It should be noted that the matching end 92 and the connecting end 93 of the present embodiment form an L-shaped structure, and the connecting end 93 is tightly attached to the cavity wall of the recessed cavity 23, so that the matching and fixing of the cushion column and the piston 2 are realized through the matching end 92, and the coaxial effect after the cushion column and the piston 2 are matched is effectively ensured by the tight fit between the connecting end 93 and the recessed cavity 23.
In the process of assembling the oil cylinder, the magnetic ring 8 is fixed in the concave cavity 23 of the piston 2 by the first screw 101, and then the buffer column is assembled with the piston 2 by the second screw 102.
Example 2:
referring to fig. 4, on the basis of the small-sized cylinder of embodiment 1, the small-sized cylinder of this embodiment further includes a floating buffer structure disposed in the cylinder tube 1.
The floating buffer structure adopted in this embodiment is a floating ring buffer sheet 105, and the floating ring buffer sheet 105 of this embodiment can be made of, for example, but not limited to, copper material. The end part of the cylinder bottom 5 facing the rodless cavity is also concavely provided with a counter bore 52 communicated with the containing cavity 51; a floating annular damping plate 105 is embedded in the counterbore 52. And the inner hole edge of the floating annular buffer plate 105 is also adapted to contact the columnar body 91 of the buffer column.
In further detail, one end of the floating ring buffer 105 facing the piston 2 is provided with an L-shaped step; the L-shaped step is adapted to abut a circlip 106; and the outer peripheral edge of the circlip 106 is embedded into the side wall of the counterbore 52 so that the floating annular cushion sheet 105 is restrained at both axial ends between the counterbore 52 and the circlip 106. In this way, the floating annular buffer plate 105 itself is not fixed to the cylinder bottom 5 by direct fitting, but only the floating annular buffer plate 105 is axially retained between the counterbore 52 and the circlip 106, so that the floating annular buffer plate 105 can float in the axial direction of the cylinder tube 1 to some extent. The floating annular buffer piece 105 is made into a floating buffer in the embodiment, and the buffer effect in the use process of the oil cylinder can be better achieved by matching with the buffer column.
The above embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above embodiments are only examples of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the present disclosure, unless otherwise expressly stated or limited, the first feature may comprise both the first and second features directly contacting each other, and also may comprise the first and second features not being directly contacting each other but being in contact with each other by means of further features between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.
Claims (10)
1. A small-sized oil cylinder is characterized by comprising: the piston is arranged in the cylinder barrel and is in sliding fit with the cylinder barrel, and the piston rod is connected with the piston;
one end of the cylinder barrel is connected with a cylinder bottom, and the other end of the cylinder barrel is matched and connected with a guide sleeve; a rodless cavity is formed between the piston and the cylinder bottom, and a rod cavity is formed between the piston and the guide sleeve; wherein
The piston rod is provided with a hollow middle shaft hole;
the cylinder bottom is matched and connected with a sensor, and a detection part of the sensor is suitable for penetrating through the cylinder bottom from the outer side of the cylinder bottom, then being inserted into the cylinder barrel and then extending into the middle shaft hole; the piston is provided with a through hole communicated with the middle shaft hole;
one end of the piston, which faces the rodless cavity, is matched with an annular magnetic ring which is suitable for a detection part of the sensor to penetrate through; and
the end part of the piston facing the rodless cavity is also matched and connected with a buffer column; and a hollow shaft hole which is suitable for the detection part of the sensor to pass through and is coaxial with the through hole is also formed in the buffer column.
2. The compact oil cylinder according to claim 1, characterized in that the end of the piston facing the rodless chamber is further recessed with a recessed chamber around the through hole; and
the annular magnetic ring is assembled in the concave cavity.
3. The small oil cylinder as claimed in claim 2, wherein the annular magnetic ring is fixed to the cavity bottom of the concave cavity by a first screw.
4. A small-sized oil cylinder according to any one of claims 2 or 3, characterized in that the end of the cylinder bottom facing the rodless chamber is concavely provided with a containing chamber coaxial with the through hole;
the buffer column comprises a columnar body suitable for being inserted into the accommodating cavity and a connecting part connected with one end of the columnar body; wherein
The connecting part comprises a matching end matched and connected with the end part of the rodless cavity of the piston and a connecting end which is integrally connected with the matching end and is embedded into the concave cavity to be matched with the cavity wall of the concave cavity in a sealing mode.
5. The compact cylinder of claim 4, wherein the mating end is mated with the end of the piston rodless cavity by a second screw.
6. The small oil cylinder according to claim 4, characterized in that the end part of the cylinder bottom facing the rodless cavity is further concavely provided with a counter bore communicated with the accommodating cavity;
a floating annular buffer sheet is embedded in the counter bore.
7. A miniature cylinder as set forth in claim 6 wherein said floating annular bumper tab has an inner bore edge adapted to contact said bumper post.
8. The small oil cylinder according to claim 6, characterized in that one end of the floating annular buffer sheet facing the piston is provided with an L-shaped step;
the L-shaped step is suitable for being abutted against an elastic check ring; and
the outer circumferential edge of the elastic check ring is embedded into the side wall of the counter bore, so that the two axial ends of the floating annular buffer sheet are limited between the counter bore and the elastic check ring.
9. The small oil cylinder according to claim 1, characterized in that the sensor is fixed with the cylinder bottom through threaded fit.
10. The small oil cylinder according to claim 1, characterized in that the cylinder bottom and the cylinder barrel are fixed by thread fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022774358.3U CN214007656U (en) | 2020-11-26 | 2020-11-26 | Small-sized oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022774358.3U CN214007656U (en) | 2020-11-26 | 2020-11-26 | Small-sized oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214007656U true CN214007656U (en) | 2021-08-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022774358.3U Active CN214007656U (en) | 2020-11-26 | 2020-11-26 | Small-sized oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214007656U (en) |
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2020
- 2020-11-26 CN CN202022774358.3U patent/CN214007656U/en active Active
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