Hydraulic cylinder with non-high pressure resistant proximity switch arrangement

Abstract

The utility model relates to hydraulic cylinder technical field, and disclose a kind of hydraulic cylinder with non high-pressure-resistant proximity switch device, including cylinder barrel, detection assembly is installed on the cylinder barrel, the detection assembly includes two installation sleeve, contact seat, detection ring, driving seat, magnetic block, connecting rod, spring, adjusting ring, connecting seat and proximity switch;Two the installation sleeve is symmetrically installed in the outer lateral wall of cylinder barrel.The utility model in the process of driving piston moves, magnetic ring also moves along, when detection ring moves to the proximity switch induction area, proximity switch exports current signal;Relative to prior art, the utility model is through the cooperation of magnetic block, detection ring, connecting rod, proximity switch, magnetic ring etc. structure, when piston rod is in place, proximity switch can send current signal in time, and detection assembly is arranged at the outside of cylinder barrel, without replacing high-pressure-resistant proximity switch, the accurate detection of piston rod position is realized, and cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically a hydraulic cylinder with a non-high-pressure resistant proximity switch device. Background Technology

[0002] With the continuous development of modern industry, the demand for automation in mechanical equipment is increasing, which requires a closer integration of electrical, hydraulic, and mechanical technologies. As a key actuator in hydraulic systems, hydraulic cylinders utilize advanced technologies such as inductive proximity switches or magnetostrictive displacement sensors to achieve precise automatic detection of the piston rod position and coordinate with the control system, thereby achieving automated operation of the equipment.

[0003] Currently, proximity switches installed in hydraulic cylinders have certain drawbacks. In the built-in proximity switch installation method, the proximity switch needs to be inserted into the front and rear end covers of the hydraulic cylinder. When the hydraulic cylinder reaches its limit position, the proximity switch can accurately detect the position of the internal piston and send a corresponding signal. Since the working pressure of the hydraulic cylinder is relatively high, typically between 7-35 MPa, the required proximity switch must be able to withstand such high pressure. However, high-pressure resistant proximity switches are expensive, which undoubtedly increases the cost of the entire hydraulic cylinder significantly. Therefore, a hydraulic cylinder with a non-high-pressure resistant proximity switch device is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a hydraulic cylinder with a non-high-pressure resistant proximity switch device to solve the problem mentioned in the background art that the working pressure of the hydraulic cylinder is relatively high, usually between 7-35MPa. Therefore, the proximity switch required must be able to withstand such high pressure. However, the high cost of high-pressure resistant proximity switches undoubtedly increases the cost of the entire hydraulic cylinder.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a hydraulic cylinder with a non-high-pressure resistant proximity switch device, comprising a cylinder barrel, on which a detection assembly is mounted, the detection assembly comprising two mounting sleeves, a contact seat, a detection ring, a drive seat, a magnetic block, a connecting rod, a spring, an adjusting ring, a connecting seat, and a proximity switch;

[0006] Two mounting sleeves are symmetrically mounted on the outer side wall of the cylinder. The two ends of the connecting rod are fixedly connected to the opposite surfaces of the contact seat and the drive seat, respectively. The detection ring is fixedly connected to the outer side wall of the connecting rod. The magnetic block is fixedly connected to the upper surface of the drive seat. The connecting seat is threadedly connected to the bottom end of the mounting sleeve. The spring is located inside the mounting sleeve. The proximity switch is installed inside the mounting sleeve. The outer side wall of the drive seat is slidably connected to the inner side wall of the mounting sleeve.

[0007] Preferably, the two ends of the spring abut against the opposite surfaces of the connecting seat and the contact seat, respectively, and an adjusting ring is fixedly connected to the lower surface of the connecting seat.

[0008] Preferably, the upper surface of the magnetic block is attached to the outer wall of the cylinder.

[0009] Preferably, a piston rod is provided inside the cylinder, and a drive piston is installed on the outer wall of the piston rod, the drive piston being slidably connected to the inside of the cylinder.

[0010] Preferably, two magnetic rings are embedded in the outer wall of the aforementioned driving piston, and the driving piston is located between two mounting sleeves.

[0011] Preferably, the front end and rear end of the cylinder are respectively equipped with a front cover and a rear cover, and the piston rod is slidably connected to the inside of the front cover.

[0012] Preferably, the aforementioned front cover is provided with an oil inlet.

[0013] Preferably, the rear cover described above is provided with a rear oil inlet.

[0014] Compared with the prior art, the present invention, by adopting the above technical solution, has the following technical effects:

[0015] In this invention, the magnetic ring moves along with the piston during its movement. When the magnetic ring reaches a position corresponding to the magnetic block, it repels the magnetic block with magnetic force. The connecting rod then drives the detection ring. When the detection ring moves to the proximity switch's sensing area, the proximity switch outputs a current signal, thus achieving the position detection of the hydraulic cylinder piston rod. Compared to existing technologies, this invention, through the cooperation of the magnetic block, detection ring, connecting rod, proximity switch, and magnetic ring, allows the proximity switch to promptly send a current signal when the piston rod reaches its position. Furthermore, the detection components are located outside the cylinder, achieving accurate piston rod position detection without the need to replace the high-pressure proximity switch, thereby reducing costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the piston rod structure of this utility model;

[0020] Figure 4 This is an exploded view of the detection component structure of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 101, detection component; 11, mounting sleeve; 12, contact seat; 13, detection ring; 14, drive seat; 15, magnetic block; 16, connecting rod; 17, spring; 18, adjusting ring; 19, connecting seat; 20, proximity switch; 31, cylinder; 32, piston rod; 33, drive piston; 34, magnetic ring; 35, front cover; 36, inlet port; 37, rear cover; 38, rear inlet port. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0024] Example

[0025] In the existing technology, hydraulic cylinders operate at high pressures, typically between 7-35 MPa. Therefore, the required proximity switches must be able to withstand such high pressures. However, high-pressure proximity switches are expensive, which undoubtedly increases the overall cost of the hydraulic cylinder.

[0026] Please see Figures 1-4 This utility model provides a technical solution: a hydraulic cylinder with a non-high pressure resistant proximity switch device, including a cylinder barrel 31, a detection component 101 installed on the cylinder barrel 31, the detection component 101 including two mounting sleeves 11, a contact seat 12, a detection ring 13, a drive seat 14, a magnetic block 15, a connecting rod 16, a spring 17, an adjusting ring 18, a connecting seat 19 and a proximity switch 20;

[0027] Two mounting sleeves 11 are symmetrically mounted on the outer side wall of the cylinder 31. The two ends of the connecting rod 16 are fixedly connected to the opposite surfaces of the contact seat 12 and the drive seat 14, respectively. The detection ring 13 is fixedly connected to the outer side wall of the connecting rod 16. The proximity switch 20 is installed inside the mounting sleeve 11. In the initial state, the detection ring 13 is located directly above the proximity switch 20. When the detection ring 13 moves to the sensing area of ​​the proximity switch 20, the proximity switch 20 outputs a current signal, thereby realizing the detection of the hydraulic cylinder position and sending a signal.

[0028] The proximity switch 20 is a non-high voltage resistant proximity switch. The proximity switch 20 is existing technology, so its internal structure, working principle, connection and control method will not be described in detail.

[0029] The magnetic block 15 is fixedly connected to the upper surface of the drive seat 14, the connecting seat 19 is threadedly connected to the bottom end of the mounting sleeve 11, the spring 17 is located inside the mounting sleeve 11, the outer side wall of the drive seat 14 is slidably connected to the inner side wall of the mounting sleeve 11, the two ends of the spring 17 respectively abut against the opposite surfaces of the connecting seat 19 and the contact seat 12, the upper surface of the magnetic block 15 is attached to the outer side wall of the cylinder 31, in the initial state, under the pushing force of the spring 17, the contact seat 12 drives the connecting rod 16 to move upward, thereby pushing the drive seat 14, the drive seat 14 acts on the magnetic block 15, so that it is attached to the cylinder 31, at this time the detection ring 13 is located above the proximity switch 20;

[0030] An adjusting ring 18 is fixedly connected to the lower surface of the connecting seat 19. Since the connecting seat 19 and the mounting sleeve 11 are connected by threads, the tension of the spring 17 can be adjusted when the adjusting ring 18 drives the connecting seat 19 to rotate. In practical applications, the tension of the spring 17 can be adjusted according to the strength of the magnetic force.

[0031] In this embodiment, specifically: a front cover 35 and a rear cover 37 are respectively installed at the front end and rear end of the cylinder 31. The piston rod 32 is slidably connected to the inside of the front cover 35. The front cover 35 is provided with a front oil port 36, and the rear cover 37 is provided with a rear oil port 38. The piston rod 32 is provided inside the cylinder 31. A drive piston 33 is installed on the outer side wall of the piston rod 32. The drive piston 33 is slidably connected to the inside of the cylinder 31. Two magnetic rings 34 are embedded in the outer side wall of the drive piston 33. The drive piston 33 is located between two mounting sleeves 11. The magnetic poles of the magnetic rings 34 and the opposite side of the magnetic block 15 are opposite.

[0032] When the piston rod 32 of the hydraulic cylinder extends, hydraulic oil is injected into the cylinder 31 through the rear oil inlet 38. The hydraulic oil pushes the drive piston 33 to slide forward in the cylinder 31. The drive piston 33 drives the piston rod 32, causing its end to extend. During the movement of the drive piston 33, the magnetic ring 34 also moves. When the magnetic ring 34 moves to the position corresponding to the magnetic block 15, the magnetic ring 34 repels the magnetic block 15 away through magnetic force. At this time, the front proximity switch 20 outputs a current signal, thereby realizing the detection of the position of the front end of the hydraulic cylinder piston rod and sending a signal.

[0033] The working principle or structural principle is as follows: hydraulic oil is injected into the cylinder 31 through the rear oil inlet 38. The end of the piston rod 32 extends out. During the movement of the driving piston 33, the magnetic ring 34 also moves. When the magnetic ring 34 moves to the position corresponding to the magnetic block 15, the magnetic ring 34 repels the magnetic block 15 away through magnetic force. The magnetic block 15 pushes the drive seat 14 to move downward. The drive seat 14 drives the connecting rod 16, and the connecting rod 16 drives the detection ring 13. The detection ring 13 moves to the sensing area of ​​the proximity switch 20. The proximity switch 20 at the front end outputs a current signal, thereby realizing the detection of the position of the front end of the hydraulic cylinder piston rod and sending a signal.

[0034] When the piston rod 32 returns to its original position, hydraulic oil is injected into the cylinder 31 through the inlet port 36. The magnetic block 15 at the front end adheres to the cylinder 31 under the thrust of the spring 17, and the detection ring 13 moves away from the proximity switch 20. At the same time, the piston rod 32 moves in the opposite direction. When the magnetic ring 34 moves to a position corresponding to the other magnetic block 15, the detection ring 13 at that position moves to the sensing area of ​​the proximity switch 20, and the proximity switch 20 at the rear end outputs a current signal, thereby realizing the detection of the position of the rear end of the hydraulic cylinder piston rod.

[0035] In summary, compared with the prior art, this utility model, through the cooperation of structures such as magnetic block 15, detection ring 13, connecting rod 16, proximity switch 20, and magnetic ring 34, enables the proximity switch 20 to send a current signal in a timely manner when the piston rod 32 is in position. Moreover, the detection component 101 is set outside the cylinder 31, achieving accurate detection of the position of the piston rod 32 without the need to replace the high-voltage proximity switch, thus reducing costs.

[0036] Those skilled in the art will understand that the features described in the various embodiments and / or claims of this utility model can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in this utility model. In particular, the features described in the various embodiments and / or claims of this utility model can be combined or combined in various ways without departing from the spirit and teachings of this utility model. All such combinations and / or combinations fall within the scope of this utility model.

Claims

1. A hydraulic cylinder with a non-high-pressure resistant proximity switch, comprising a cylinder barrel (31), characterized in that: The cylinder (31) is equipped with a detection assembly (101), which includes two mounting sleeves (11), a contact seat (12), a detection ring (13), a drive seat (14), a magnetic block (15), a connecting rod (16), a spring (17), an adjusting ring (18), a connecting seat (19), and a proximity switch (20). Two mounting sleeves (11) are symmetrically mounted on the outer side wall of the cylinder (31). The two ends of the connecting rod (16) are fixedly connected to the opposite surfaces of the contact seat (12) and the drive seat (14), respectively. The detection ring (13) is fixedly connected to the outer side wall of the connecting rod (16). The magnetic block (15) is fixedly connected to the upper surface of the drive seat (14). The connecting seat (19) is threadedly connected to the bottom end of the mounting sleeve (11). The spring (17) is located inside the mounting sleeve (11). The proximity switch (20) is installed inside the mounting sleeve (11). The outer side wall of the drive seat (14) is slidably connected to the inner side wall of the mounting sleeve (11).

2. A hydraulic cylinder with a non-high-pressure resistant proximity switch device according to claim 1, characterized in that: The two ends of the spring (17) abut against the opposite surfaces of the connecting seat (19) and the contact seat (12), respectively, and an adjusting ring (18) is fixedly connected to the lower surface of the connecting seat (19).

3. A hydraulic cylinder with a non-high-pressure resistant proximity switch device according to claim 2, characterized in that: The upper surface of the magnetic block (15) is attached to the outer wall of the cylinder (31).

4. A hydraulic cylinder with a non-high-pressure resistant proximity switch device according to claim 1, characterized in that: A piston rod (32) is provided inside the cylinder (31), and a drive piston (33) is installed on the outer wall of the piston rod (32). The drive piston (33) is slidably connected to the inside of the cylinder (31).

5. A hydraulic cylinder with a non-high-pressure resistant proximity switch device according to claim 4, characterized in that: Two magnetic rings (34) are embedded in the outer wall of the drive piston (33), and the drive piston (33) is located between two mounting sleeves (11).

6. A hydraulic cylinder with a non-high-pressure resistant proximity switch device according to claim 5, characterized in that: The front end and rear end of the cylinder (31) are respectively equipped with a front cover (35) and a rear cover (37), and the piston rod (32) is slidably connected to the inside of the front cover (35).

7. A hydraulic cylinder with a non-high-pressure resistant proximity switch device according to claim 6, characterized in that: The front cover (35) is provided with an oil inlet (36).

8. A hydraulic cylinder with a non-high-pressure resistant proximity switch device according to claim 6, characterized in that: The rear cover (37) is provided with a rear oil inlet (38).

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