CN220890648U - Long-stroke dual-sensor servo hydraulic cylinder - Google Patents
Long-stroke dual-sensor servo hydraulic cylinder Download PDFInfo
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- CN220890648U CN220890648U CN202322800993.8U CN202322800993U CN220890648U CN 220890648 U CN220890648 U CN 220890648U CN 202322800993 U CN202322800993 U CN 202322800993U CN 220890648 U CN220890648 U CN 220890648U
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- 230000000149 penetrating effect Effects 0.000 claims abstract description 14
- 230000001681 protective effect Effects 0.000 claims description 12
- 230000009977 dual effect Effects 0.000 claims description 10
- 210000004907 gland Anatomy 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 abstract description 9
- 230000005856 abnormality Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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Abstract
The utility model relates to a long-stroke dual-sensor servo hydraulic cylinder, which comprises a cylinder barrel, wherein two ends of the cylinder barrel are respectively provided with a cylinder head and a cylinder bottom to form a cavity, the inner and outer penetrating cylinder heads are provided with piston rods, the end parts of the piston rods are provided with pistons, the cavity is divided into a rod cavity and a rodless cavity, the inner and outer penetrating cylinder bottoms are provided with two groups of sensors, an electromagnetic bin of each sensor is arranged on the outer side surface of the cylinder bottom, a measuring rod of each sensor extends into the piston rod, and the long-stroke dual-sensor servo hydraulic cylinder also comprises a magnetic ring movably sleeved on the measuring rod, and the magnetic ring moves along with the piston rod; a guide rod is commonly arranged between the cylinder head and the cylinder bottom, and the guide rod movably penetrates through the piston; therefore, the double-sensor installation on the hydraulic cylinder is realized, the occurrence of abnormality caused by the failure and instability of a single sensor is effectively reduced and even avoided, the anti-rotation structure is formed by the arrangement of the guide rod, the reliability of the linear movement of the piston is effectively ensured, the reliable use of the sensor is ensured, and the hydraulic cylinder is particularly suitable for long stroke and has good practicability.
Description
Technical Field
The utility model relates to the technical field of servo hydraulic cylinders, in particular to a long-stroke dual-sensor servo hydraulic cylinder.
Background
Hydraulic cylinders are often equipped with sensors to accurately feedback the real-time position of the piston within the cylinder.
In the prior art, as an electronic product, the sensor is unstable and even fails, and is abnormal due to the influence of working conditions such as environment, and the like, potential hidden danger of feedback failure of the sensor exists, so that the acquisition of the real-time position of the piston fails, and the normal use of the hydraulic cylinder is influenced.
In addition, in the existing hydraulic cylinder, the piston inevitably deflects in circumferential angle in the axial movement process, and especially for a long-stroke hydraulic cylinder, the normal use of the sensor can be influenced, and the sensitivity and reliability of the sensor are reduced.
Disclosure of utility model
The application aims at the defects in the prior art, and provides the long-stroke dual-sensor servo hydraulic cylinder with reasonable structure, thereby realizing the installation of dual sensors on the hydraulic cylinder, effectively ensuring the reliability of the linear movement of the piston, ensuring the reliable use of the sensors, being particularly suitable for long strokes and having good practicability.
The technical scheme adopted by the utility model is as follows:
The long-stroke dual-sensor servo hydraulic cylinder comprises a cylinder barrel, wherein two ends of the cylinder barrel are respectively provided with a cylinder head and a cylinder bottom to form a cavity, a piston rod is arranged at the inner and outer penetrating through the cylinder head, the end part of the piston rod is provided with a piston, the cavity is divided into a rod cavity and a rodless cavity, two groups of sensors are arranged at the inner and outer penetrating through the cylinder bottom, an electromagnetic bin of each sensor is arranged on the outer side surface of the cylinder bottom, a measuring rod of each sensor extends into the piston rod, and the long-stroke dual-sensor servo hydraulic cylinder also comprises a magnetic ring movably sleeved on the measuring rod, and the magnetic ring moves along with the piston rod; and a guide rod is jointly installed between the cylinder head and the cylinder bottom, and the guide rod movably penetrates through the piston.
As a further improvement of the above technical scheme:
The piston is provided with a through hole for the guide rod to penetrate, a through hole orifice facing the rod cavity is concavely arranged as a counter bore, and a guide sleeve and a gland are sequentially accommodated in the counter bore; sealing structures are arranged between the inner circumferential surface of the guide sleeve and the outer wall surface of the guide rod and between the outer circumferential surface of the guide sleeve and the inner wall surface of the counter bore.
The end part of the piston rod positioned in the cavity is provided with a small-diameter step shaft section, the step shaft section is sequentially sleeved with a positioning sleeve, a piston and a locking nut, and the locking nut compresses the piston and the positioning sleeve towards the step direction; the side edge of the locating sleeve is tightly attached to the side edge of the gland.
The axial centers of the cavity, the piston rod and the piston are positioned on the same straight line, and the guide rod is installed in the eccentric hole of the piston at the end part of the piston rod in a penetrating way.
The outer side surface of the cylinder bottom is provided with a protective cover for containing the sensor electromagnetic bin, the protective cover is provided with a cold air inlet and an exhaust groove, and the cold air inlet is communicated with an external compressed air source.
The protective cover comprises a bin body with an opening at one end, a flange end extends outwards from the opening end of the bin body, and the flange end is attached to the outer wall surface of the cylinder bottom and fixed by screws; the side wall of the bin body is provided with a cold air inlet and a wire outlet in a penetrating way, and the end face of the flange end is provided with a plurality of exhaust grooves which are internally and externally penetrated.
The end face of the piston rod positioned in the cavity is concavely provided with long holes which are in one-to-one correspondence with the sensors, and the measuring rod extends into the long holes; the magnetic ring is assembled at the hole opening of the long hole through the pressing block.
The measuring rod of one of the two sets of sensors is arranged along the axial center of the piston rod.
The cylinder head is provided with an oil hole I communicated with the rod cavity, and the cylinder bottom is provided with an oil hole II communicated with the rodless cavity.
The beneficial effects of the utility model are as follows:
the utility model has compact and reasonable structure, realizes the installation of double sensors on the hydraulic cylinder, effectively reduces or even avoids the occurrence of abnormality caused by the failure, instability and other factors of a single sensor, and effectively ensures the reliability of the linear movement of the piston by the arrangement of the guide rod, ensures the reliable use of the sensors, is particularly suitable for long stroke and has good practicability;
The utility model also has the following advantages:
by combining the mounting structure of the piston rod end positioning sleeve and the locking nut on the piston, the synchronous compaction of the guide sleeve and the gland is realized on the side surface of the piston, so that the structure is ingenious and reasonable, and the reliable and effective sealing of the piston after the guide rod is mounted in a penetrating manner is realized;
The sensor electromagnetic bin outer protective cover is installed, cold air continuously enters through the cold air inlet and is discharged through the exhaust groove, so that the lower working temperature around the electromagnetic bin is effectively kept, the sensor electromagnetic bin outer protective cover is prevented from being influenced by high temperature in the hydraulic cylinder, and the use reliability and the service life of the sensor are guaranteed.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a partial enlarged view at a in fig. 1.
Fig. 3 is a partial enlarged view at B in fig. 2.
Fig. 4 is a cross-sectional view of the shield of the present utility model.
Fig. 5 is a side view of the shield of the present utility model.
Fig. 6 is a schematic view of the hydraulic cylinder of the present utility model during use.
Wherein: 1. a cylinder head; 2. a cylinder; 3. a piston rod; 4. a piston; 5. a cylinder bottom; 6. a magnetic ring; 7. a sensor; 8. a guide rod; 9. guide sleeve; 11. an oil hole I; 31. a long hole; 41. a positioning sleeve; 42. a lock nut; 51. an oil hole II; 70. a protective cover; 71. an electromagnetic bin; 72. a measuring rod; 701. a bin body; 702. a cool air inlet; 703. a flange end; 704. an exhaust groove; 705. a wire outlet hole; 91. and (5) pressing cover.
Detailed Description
The following describes specific embodiments of the present utility model with reference to the drawings.
As shown in fig. 1, the long-stroke dual-sensor servo hydraulic cylinder of the embodiment comprises a cylinder barrel 2, wherein a cylinder head 1 and a cylinder bottom 5 are respectively assembled at two ends of the cylinder barrel 2 to form a cavity, a piston rod 3 is assembled inside and outside penetrating the cylinder head 1, a piston 4 is arranged at the end part of the piston rod 3, the cavity is divided into a rod cavity and a rodless cavity, two groups of sensors 7 are arranged inside and outside penetrating the cylinder bottom 5, an electromagnetic bin 71 of each sensor 7 is arranged on the outer side surface of the cylinder bottom 5, a measuring rod 72 of each sensor 7 extends into the piston rod 3, and the long-stroke dual-sensor servo hydraulic cylinder further comprises a magnetic ring 6 movably sleeved on the measuring rod 72, and the magnetic ring 6 moves along with the piston rod 3; a guide rod 8 is commonly installed between the cylinder head 1 and the cylinder bottom 5, and the guide rod 8 movably penetrates through the piston 4.
In this embodiment, through installing two sets of sensors 7 on the cylinder bottom 5, realized the installation of two sensors 7 on the pneumatic cylinder, effectively reduced even avoided the emergence of abnormal caused by factors such as single sensor 7 is malfunctioning, unstable to constitute anti-rotation structure by setting up of guide bar 8, provide the guide effect for the removal of piston 4, piston rod 3, effectively guarantee the reliability of piston 4 rectilinear movement, guarantee the reliable use of sensor 7.
As shown in fig. 2 and 3, a through hole for the guide rod 8 to penetrate is formed in the piston 4, a counter bore is concavely formed towards the hole opening of the through hole with the rod cavity, and a guide sleeve 9 and a gland 91 are sequentially accommodated in the counter bore; sealing structures are arranged between the inner circumferential surface of the guide sleeve 9 and the outer wall surface of the guide rod 8 and between the outer circumferential surface of the guide sleeve 9 and the inner wall surface of the counter bore.
In this embodiment, the guide rod 8 is movably mounted on the piston 4 while being combined with the sealing structure via the guide sleeve 9, so as to realize the tightness of the assembly of the guide rod 8 between the pistons 4.
The end part of the piston rod 3 positioned in the cavity is provided with a small-diameter step shaft section, a positioning sleeve 41, a piston 4 and a locking nut 42 are sleeved on the step shaft section in sequence, and the locking nut 42 compresses the piston 4 and the positioning sleeve 41 towards the step direction; the side edge of the positioning sleeve 41 is tightly attached to the side edge of the gland 91.
In the embodiment, the synchronous compaction of the guide sleeve 9 and the gland 91 is realized on the side surface of the piston 4 by combining the mounting structure of the end part locating sleeve 41 and the locking nut 42 of the piston rod 3 to the piston 4, so that the structure is ingenious and reasonable, and the reliable and effective sealing of the piston 4 after the guide rod 8 is mounted in a penetrating manner is realized.
During installation, the positioning sleeve 41 is sleeved on the step shaft section of the piston rod 3, the guide sleeve 9 and the gland 91 are assembled in the counter bore of the piston 4, the piston 4 is sleeved on the step shaft section, and finally the lock nut 42 is locked on the shaft end of the piston rod 3, so that the reliable installation of the piston 4 on the piston rod 3 is realized, and the reliable installation of the gland 91 and the guide sleeve 9 in the piston 4 is realized through the positioning sleeve 41.
The axial centers of the cavity, the piston rod 3 and the piston 4 are positioned on the same straight line, and the guide rod 8 is penetratingly arranged in the eccentric hole of the piston 4 at the end part of the piston rod 3, so that the integral layout is effectively carried out, and the built-in installation of the guide anti-rotation mechanism of the piston rod 3 is realized, and the structure is compact and ingenious.
As shown in fig. 4 and 5, a protective cover 70 for containing an electromagnetic bin 71 of the sensor 7 is arranged on the outer side surface of the cylinder bottom 5, a cold air inlet 702 and an exhaust groove 704 are arranged on the protective cover 70, and the cold air inlet 702 is communicated with an external compressed air source.
In this embodiment, the sensor 7 is installed on the external shield 70 of the electromagnetic bin 71, and the cold air continuously enters through the cold air inlet 702 and is discharged through the air discharge groove 704, so that the lower working temperature around the electromagnetic bin 71 is effectively ensured, the electromagnetic bin is prevented from being influenced by the high temperature in the hydraulic cylinder, and the use reliability and the service life of the sensor 7 are ensured.
The protective cover 70 comprises a bin body 701 with an opening at one end, a flange end 703 extends outwards from the opening end of the bin body 701, and the flange end 703 is attached to the outer wall surface of the cylinder bottom 5 and fixed by screws; the side wall of the bin body 701 is provided with a cold air inlet 702 and a wire outlet 705 in a penetrating way, and the end face of the flange end 703 is provided with a plurality of exhaust grooves 704 which are internally and externally penetrated.
The end face of the piston rod 3 positioned in the cavity is concavely provided with long holes 31 which are in one-to-one correspondence with the sensors 7, and the measuring rod 72 extends into the long holes 31; the magnetic ring 6 is assembled at the hole opening of the long hole 31 through a pressing block, so that the sensor 7 is mounted on the hydraulic cylinder.
The measuring rod 72 of one of the two sets of sensors 7 is arranged along the axial center of the piston rod 3, and the other set of measuring rods 72 is arranged eccentrically with respect to the axial direction of the piston rod 3.
Of course, the measuring rods 72 of the two sets of sensors 7 may be both arranged eccentrically with respect to the piston rod 3, and the two sets of sensors 7 may be used effectively and reliably under the guidance of the anti-rotation mechanism mainly composed of the guide rod 8.
The cylinder head 1 is provided with an oil hole I11 communicated with a rod cavity, the cylinder bottom 5 is provided with an oil hole II 51 communicated with a rodless cavity, and oil inlet and oil outlet in the hydraulic cylinder cavity are realized through the oil hole I11 and the oil hole II 51.
During the working and use process of the hydraulic cylinder, the piston rod 3 and the piston 4 move linearly along the axial direction of the cylinder barrel 2, and the guide rod 8 provides guide for the axial linear movement so as to ensure the stability of the movement; in the process, both groups of sensors 7 are in a working state, and the real-time position of the piston 4 is fed back; fig. 6 is a schematic view showing a state in which the piston 4 moves to the middle of the cylinder tube 2.
The utility model realizes the installation of the double sensors on the hydraulic cylinder, effectively ensures the reliability of the linear movement of the piston, ensures the reliable use of the sensors, is particularly suitable for long stroke and has good practicability.
The above description is intended to illustrate the utility model and not to limit it, the scope of which is defined by the claims, and any modifications can be made within the scope of the utility model.
Claims (9)
1. The utility model provides a long-stroke dual sensor servo hydraulic cylinder, includes cylinder (2), and cylinder (2) both ends are furnished with cylinder head (1) respectively, bottom of the cylinder (5) constitute the cavity, and inside and outside run through cylinder head (1) and are furnished with piston rod (3), and piston (4) are installed to piston rod (3) tip, divide into have pole chamber and rodless chamber with the cavity, its characterized in that: two groups of sensors (7) are arranged inside and outside the through cylinder bottom (5), an electromagnetic bin (71) of each sensor (7) is arranged on the outer side surface of the cylinder bottom (5), a measuring rod (72) of each sensor (7) extends into the piston rod (3), and the electromagnetic cylinder bottom also comprises a magnetic ring (6) movably sleeved on the measuring rod (72), wherein the magnetic ring (6) moves along with the piston rod (3); a guide rod (8) is mounted between the cylinder head (1) and the cylinder bottom (5), and the guide rod (8) movably penetrates through the piston (4).
2. A long stroke dual sensor servo hydraulic cylinder as recited in claim 1 wherein: the piston (4) is provided with a through hole for the guide rod (8) to penetrate, a through hole orifice facing the rod cavity is concavely arranged as a counter bore, and a guide sleeve (9) and a gland (91) are sequentially accommodated in the counter bore; sealing structures are arranged between the inner circumferential surface of the guide sleeve (9) and the outer wall surface of the guide rod (8) and between the outer circumferential surface of the guide sleeve (9) and the inner wall surface of the counter bore.
3. A long stroke dual sensor servo hydraulic cylinder as recited in claim 2 wherein: the end part of a piston rod (3) positioned in the cavity is provided with a small-diameter step shaft section, a positioning sleeve (41), a piston (4) and a locking nut (42) are sequentially sleeved on the step shaft section, and the locking nut (42) compresses the piston (4) and the positioning sleeve (41) towards the step direction; the side edge of the locating sleeve (41) is tightly attached to the side edge of the gland (91).
4. A long stroke dual sensor servo hydraulic cylinder as recited in claim 1 wherein: the axial centers of the cavity, the piston rod (3) and the piston (4) are positioned on the same straight line, and the guide rod (8) is installed in an eccentric hole of the piston (4) at the end part of the piston rod (3) in a penetrating way.
5. A long stroke dual sensor servo hydraulic cylinder as recited in claim 1 wherein: the electromagnetic sensor is characterized in that a protective cover (70) containing an electromagnetic bin (71) of the sensor (7) is arranged on the outer side face of the cylinder bottom (5), a cold air inlet (702) and an exhaust groove (704) are formed in the protective cover (70), and the cold air inlet (702) is communicated with an external compressed air source.
6. A long stroke dual sensor servo hydraulic cylinder as recited in claim 5 wherein: the protective cover (70) comprises a bin body (701) with an opening at one end, a flange end (703) is outwards extended from the opening end of the bin body (701), and the flange end (703) is attached to the outer wall surface of the cylinder bottom (5) and fixed by screws; a cold air inlet (702) and a wire outlet hole (705) are formed in the side wall of the bin body (701) in a penetrating mode, and a plurality of exhaust grooves (704) which are formed in the end face of the flange end (703) in an inner-outer penetrating mode are formed in the end face of the flange end.
7. A long stroke dual sensor servo hydraulic cylinder as recited in claim 1 wherein: the end face of the piston rod (3) positioned in the cavity is provided with long holes (31) in one-to-one correspondence with the sensors (7) in a concave manner, and the measuring rod (72) extends into the long holes (31); the magnetic ring (6) is assembled at the hole opening of the long hole (31) through a pressing block.
8. A long stroke dual sensor servo hydraulic cylinder as recited in claim 1 wherein: the measuring rod (72) of one of the two groups of sensors (7) is arranged along the axial center of the piston rod (3).
9. A long stroke dual sensor servo hydraulic cylinder as recited in claim 1 wherein: the cylinder head (1) is provided with an oil hole I (11) communicated with the rod cavity, and the cylinder bottom (5) is provided with an oil hole II (51) communicated with the rod-free cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322800993.8U CN220890648U (en) | 2023-10-19 | 2023-10-19 | Long-stroke dual-sensor servo hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322800993.8U CN220890648U (en) | 2023-10-19 | 2023-10-19 | Long-stroke dual-sensor servo hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220890648U true CN220890648U (en) | 2024-05-03 |
Family
ID=90867210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322800993.8U Active CN220890648U (en) | 2023-10-19 | 2023-10-19 | Long-stroke dual-sensor servo hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220890648U (en) |
-
2023
- 2023-10-19 CN CN202322800993.8U patent/CN220890648U/en active Active
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