Hydraulic cylinder with displacement monitoring function
By setting a hollow channel and displacement monitoring components inside the piston rod of the hydraulic cylinder, and using a monitoring system composed of waveguide wire, permanent magnet float and detection coil, the problem of the lack of displacement monitoring device in the hydraulic cylinder is solved, and accurate piston rod displacement measurement is achieved, improving the control accuracy and stability of the equipment.
Patent Information
- Application Number
- CN202520488756.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-20
AI Technical Summary
The existing hydraulic cylinders are not equipped with displacement monitoring devices, which means that operators can only judge the position of the piston rod by observing the equipment's operating status or relying on experience. This results in low control accuracy and makes it easy for operational errors to occur.
A hollow channel is set inside the piston rod of the hydraulic cylinder, and a displacement monitoring component consisting of a waveguide wire, a permanent magnet float, and a detection coil is used to accurately measure the displacement change of the piston rod through induced current signals.
It significantly improves the accuracy of displacement monitoring, avoids operational errors caused by inaccurate position judgment, enhances the precision and stability of equipment operation, and ensures production efficiency and product quality.
Smart Images
Figure CN223952978U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to hydraulic cylinder technical field, specifically, relate to a kind of hydraulic cylinder with displacement monitoring. BACKGROUND
[0002] As a kind of energy conversion device for converting hydraulic energy into mechanical energy, hydraulic cylinder is widely used in various industrial equipment. In many practical application scenarios, such as automated production line, engineering machinery, etc., accurately grasping the displacement of hydraulic cylinder piston rod is crucial for the precise control and safe operation of equipment.
[0003] The existing hydraulic cylinder has many deficiencies in displacement monitoring, some hydraulic cylinders are not equipped with displacement monitoring device, and the operator can only roughly judge the position of piston rod by observing the equipment running state or relying on experience, which leads to low control accuracy and easy operation error.
[0004] Therefore, we improve it and propose a kind of hydraulic cylinder with displacement monitoring. UTILITY MODEL CONTENT
[0005] The utility model aims at: for the many deficiencies of the existing hydraulic cylinder in displacement monitoring, some hydraulic cylinders are not equipped with displacement monitoring device, and the operator can only roughly judge the position of piston rod by observing the equipment running state or relying on experience, which leads to low control accuracy and easy operation error.
[0006] In order to realize the above-mentioned utility model purpose, the utility model provides the following technical scheme:
[0007] A kind of hydraulic cylinder with displacement monitoring is provided to improve the above problems.
[0008] The application is as follows:
[0009] It comprises cylinder barrel, closed cylinder cover and open cylinder cover are respectively installed at both ends of the cylinder barrel, a plurality of installation rods with threads at both ends are installed between the closed cylinder cover and the open cylinder cover, the threads at both ends of the installation rod are matched with fixed nuts, the open end of the open cylinder cover is slidingly matched with the piston rod, and the displacement monitoring assembly is arranged between the piston rod and the closed cylinder cover.
[0010] By setting hollow channel inside the piston rod and using displacement monitoring assembly composed of waveguide wire, permanent magnet float and detection coil, the displacement change of the piston rod can be accurately measured. Compared with traditional hydraulic cylinder without displacement monitoring device and relying on operator observation or experience to judge the position of piston rod, the accuracy of displacement monitoring is greatly improved, the operation error caused by inaccurate position judgment is effectively avoided, the precision and stability of equipment operation are significantly improved, and the production efficiency and product quality are guaranteed.
[0011] As a preferred embodiment of the hydraulic cylinder with displacement monitoring provided by the utility model, the one end of the piston rod inside the cylinder barrel is provided with a piston, the first sealing part is arranged between the piston and the inner wall of the cylinder barrel, and the first fixing part is arranged between the piston and the one end of the piston rod inside the cylinder barrel.
[0012] As a preferred embodiment of the hydraulic cylinder with displacement monitoring provided by the utility model, the one side of the closed cylinder cover is provided with the first oil port in communication with the left cavity of the cylinder barrel, and the one side of the open cylinder cover is provided with the second oil port in communication with the right cavity of the cylinder barrel.
[0013] As a preferred embodiment of the hydraulic cylinder with displacement monitoring provided by the utility model, the second sealing part is arranged between the open end of the open cylinder cover and the piston rod, and the second fixing part is arranged between the second sealing part and the open end of the open cylinder cover.
[0014] As a preferred embodiment of the hydraulic cylinder with displacement monitoring provided by the utility model, the displacement monitoring assembly comprises a data processor mounted on the outside of the closed cylinder cover, and the one side of the data processor is provided with a monitoring rod arranged in the cylinder barrel.
[0015] As a preferred embodiment of the hydraulic cylinder with displacement monitoring provided by the utility model, the hollow channel is arranged in the piston rod, the one end of the monitoring rod is arranged in the hollow channel, and the hollow channel is arranged in the axial direction of the piston rod.
[0016] As a preferred embodiment of the hydraulic cylinder with displacement monitoring provided by the utility model, the inner wall of the hollow channel is provided with a waveguide wire, the one end of the monitoring rod arranged in the hollow channel is provided with a permanent magnetic float matched with the waveguide wire, the one end of the monitoring rod arranged in the hollow channel is provided with a detection coil matched with the permanent magnetic float, and the detection coil is electrically connected with the data processor.
[0017] As a preferred embodiment of the hydraulic cylinder with displacement monitoring provided by the utility model, the sealing ring is arranged between the open end of the hollow channel and the monitoring rod, the outside of the closed cylinder cover is provided with the mounting groove matched with the data processor, and the outside of the data processor is provided with a communication interface.
[0018] Compared with the prior art, the piston rod displacement monitoring hydraulic cylinder has the beneficial effects that: the hollow channel is arranged in the piston rod, and the displacement monitoring assembly composed of the waveguide wire, the permanent magnetic float and the detection coil is utilized, so that the displacement change of the piston rod can be accurately measured, compared with the traditional hydraulic cylinder which is not equipped with the displacement monitoring device and only relies on the observation or experience judgment of the piston rod position by the operator, the accuracy of the displacement monitoring is greatly improved, the operation failure caused by the inaccurate position judgment is effectively avoided, the accuracy and stability of the equipment operation are significantly improved, and the production efficiency and product quality are further ensured. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 The whole structure schematic diagram of the hydraulic cylinder with displacement monitoring provided by the application is provided.
[0020] Figure 2 The whole structure schematic diagram of the hydraulic cylinder with displacement monitoring provided by the application is provided.
[0021] Figure 3 The connection structure schematic diagram of the monitoring rod and the piston rod provided by the application is provided.
[0022] Figure 4 The whole structure schematic diagram of the hydraulic cylinder with displacement monitoring provided by the application is provided. Figure 3 The structure schematic diagram of the position A is provided.
[0023] Figure 5 The connection structure schematic diagram of the monitoring rod and the piston rod provided by the application is provided.
[0024] Indicated in the drawing:
[0025] 1, cylinder barrel; 2, closed cylinder cover; 3, open cylinder cover; 4, mounting rod; 5, fixed nut; 6, piston rod; 7, displacement monitoring assembly; 701, data processor; 702, monitoring rod; 703, hollow channel; 704, waveguide wire; 705, permanent magnetic float; 706, detection coil; 707, sealing ring; 708, mounting groove; 709, communication interface; 8, first oil port; 9, second oil port; 10, piston; 11, first sealing part; 12, first fixed part; 13, second sealing part; 14, second fixed part. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments.
[0027] Therefore, the following detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but merely to represent some embodiments of the application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0028] It should be noted that the embodiments and features and technical solutions in the embodiments of the present application can be combined with each other without conflict.
[0029] It should be noted that: similar labels and letters in the following drawings represent similar items, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0030] In the description of the present application, it should be noted that the terms "upper", "lower" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the present application is used, or the orientation or positional relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used for differentiation and cannot be understood as indicating or implying relative importance.
[0031] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings.
[0032] It should be noted that the embodiments and features and technical solutions in the embodiments of the present application can be combined with each other without conflict.
[0033] It should be noted that: similar labels and letters in the following drawings represent similar items, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0034] Embodiment 1
[0035] Please refer to Figures 1-5The utility model provides a hydraulic cylinder with displacement monitoring, which comprises a cylinder barrel 1, a closed cylinder cover 2 and an open cylinder cover 3 installed at both ends of the cylinder barrel 1 respectively, a plurality of mounting rods 4 with threads at both ends installed between the closed cylinder cover 2 and the open cylinder cover 3, fixed nuts 5 matched with the threads at both ends of the mounting rods 4, a piston rod 6 slidingly fitted at the open end of the open cylinder cover 3, and a displacement monitoring assembly 7 arranged between the piston rod 6 and the closed cylinder cover 2. One end of the piston rod 6 inside the cylinder barrel 1 is provided with a piston 10, a first sealing part 11 is arranged between the piston 10 and the inner wall of the cylinder barrel 1, and a first fixing part 12 is arranged between the piston 10 and the one end of the piston rod 6 inside the cylinder barrel 1. A first oil port 8 is formed in one side of the closed cylinder cover 2 and is in communication with the left cavity of the cylinder barrel 1, and a second oil port 9 is formed in one side of the open cylinder cover 3 and is in communication with the right cavity of the cylinder barrel 1. A second sealing part 13 is arranged between the open end of the open cylinder cover 3 and the piston rod 6, and a second fixing part 14 is arranged between the second sealing part 13 and the open end of the open cylinder cover 3.
[0036] Implementation process: when the hydraulic system is working, hydraulic oil enters the left cavity of the cylinder barrel 1 from the first oil port 8, pushes the piston 10 to move to the right, and then drives the piston rod 6 to extend from the open end of the open cylinder cover 3; conversely, hydraulic oil enters the right cavity of the cylinder barrel 1 from the second oil port 9, pushes the piston 10 to move to the left, and the piston rod 6 is retracted. The first sealing part 11 is arranged between the piston 10 and the inner wall of the cylinder barrel 1, and the second sealing part 13 is arranged between the open end of the open cylinder cover 3 and the piston rod 6, which ensures the effective driving of the hydraulic oil in the cylinder barrel 1, reduces the risk of hydraulic oil leakage, and improves the working efficiency and reliability of the hydraulic cylinder. The closed cylinder cover 2 and the open cylinder cover 3 are connected through the mounting rods 4 and the fixed nuts 5 at both ends of the cylinder barrel 1, which makes the cylinder body convenient to assemble and facilitates the maintenance and replacement of internal components in the later period.
[0037] Implementation benefits: the first sealing part 11 and the second sealing part 13 ensure the effective driving of the hydraulic oil in the cylinder barrel 1 and reduce the risk of hydraulic oil leakage.
[0038] Example 2
[0039] The displacement monitoring assembly 7 comprises a data processor 701 mounted on the outside of the closed cylinder cover 2, and one side of the data processor 701 is provided with a monitoring rod 702 located in the cylinder barrel 1. The inside of the piston rod 6 is provided with a hollow channel 703, one end of the monitoring rod 702 is located in the hollow channel 703, and the hollow channel 703 is provided in the axial direction of the piston rod 6. The inner wall of the hollow channel 703 is provided with a waveguide wire 704, and one end of the monitoring rod 702 located in the hollow channel 703 is provided with a permanent magnet float 705 matched with the waveguide wire 704. One end of the monitoring rod 702 located in the hollow channel 703 is provided with a detection coil 706 matched with the permanent magnet float 705, and the detection coil 706 is electrically connected with the data processor 701. The opening end of the hollow channel 703 and the monitoring rod 702 are provided with a sealing ring 707, and the outside of the closed cylinder cover 2 is provided with a mounting groove 708 matched with the data processor 701. The outside of the data processor 701 is provided with a communication interface 709.
[0040] Implementation process: During the movement of the piston rod 6, because the inside of the piston rod 6 is provided with a hollow channel 703 provided in the axial direction, and the inner wall of the hollow channel 703 is provided with a waveguide wire 704, and one end of the monitoring rod 702 is located in the hollow channel 703, when the piston rod 6 drives the waveguide wire 704 on the inner wall to move, the detection coil 706 matched therewith will generate an induced current due to the change of magnetic flux. The detection coil 706 is electrically connected with the data processor 701 mounted on the outside of the closed cylinder cover 2, the data processor 701 receives the induced current signal transmitted by the detection coil 706, and according to the interaction principle of the waveguide wire 704 and the permanent magnet float 705, converts the induced current signal into displacement data of the piston rod 6. Finally, the data processor 701 transmits the displacement data to the external control system through the communication interface 709 on the outside thereof, so as to realize real-time monitoring of the displacement of the piston rod 6. The data processor 701 of the displacement monitoring assembly 7 is mounted in the mounting groove 708 on the outside of the closed cylinder cover 2, which is convenient for installation and debugging. The sealing ring 707 provided between the opening end of the hollow channel 703 and the monitoring rod 702 effectively prevents foreign matters such as dust and oil stains from entering the hollow channel 703 and affecting the performance of the monitoring assembly, and also reduces the maintenance cost. According to the communication interface 709 provided on the outside of the processor 701, such as common communication interfaces such as RS485 interface or CAN bus interface, data communication with the external control system is facilitated, real-time monitoring and remote control of the displacement of the hydraulic cylinder piston rod 6 are realized, and the automation degree of the equipment is improved.
[0041] Implementation benefits: The displacement monitoring assembly 7 can accurately measure the displacement change of the piston rod 6.
[0042] The above examples are only used to illustrate the technical solutions described in the utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the above-described various embodiments, the utility model is not limited to the above-described specific embodiments, and therefore any modification or equivalent replacement of the utility model is allowed. Any technical solution and improvement that does not deviate from the spirit and scope of the utility model is included in the scope of the claims of the utility model.
Claims
1. A hydraulic cylinder with displacement monitoring, characterized in that The utility model relates to a kind of cylinder-piston units, including: Cylinder barrel (1), closed cylinder cover (2) and open cylinder cover (3) are respectively installed in both ends of the cylinder barrel (1), a plurality of installation rods (4) with threads at both ends are installed between the closed cylinder cover (2) and open cylinder cover (3), fixed nuts (5) are matched with the threads at both ends of the installation rod (4), the open end of the open cylinder cover (3) is slidably matched with piston rod (6), and displacement monitoring assembly (7) is arranged between the piston rod (6) and closed cylinder cover (2).
2. A hydraulic cylinder with displacement monitoring according to claim 1, characterized in that One end of the piston rod (6) inside the cylinder barrel (1) is provided with a piston (10), a first sealing portion (11) is provided between the piston (10) and the inner wall of the cylinder barrel (1), and a first fixing portion (12) is provided at one end of the piston (10) and the piston rod (6) inside the cylinder barrel (1).
3. A hydraulic cylinder with displacement monitoring according to claim 2, characterized in that A first oil port (8) is formed in one side of the closed cylinder cover (2) and communicates with the left cavity of the cylinder barrel (1), and a second oil port (9) is formed in one side of the open cylinder cover (3) and communicates with the right cavity of the cylinder barrel (1).
4. A hydraulic cylinder with displacement monitoring according to claim 3, characterized in that A second sealing portion (13) is provided between the open end of the open cylinder cover (3) and the piston rod (6), and a second fixing portion (14) is provided between the second sealing portion (13) and the open end of the open cylinder cover (3).
5. The hydraulic cylinder with displacement monitoring of claim 1, wherein, The displacement monitoring assembly (7) comprises a data processor (701) mounted on the outside of the closed cylinder cover (2), and a monitoring rod (702) is mounted on one side of the data processor (701) and located inside the cylinder barrel (1).
6. A hydraulic cylinder with displacement monitoring according to claim 5, characterized in that A hollow channel (703) is formed in the inside of the piston rod (6), one end of the monitoring rod (702) is located in the hollow channel (703), and the hollow channel (703) is provided along the axis direction of the piston rod (6).
7. A hydraulic cylinder with displacement monitoring according to claim 6, characterized in that A waveguide wire (704) is mounted on the inner wall of the hollow channel (703), a permanent magnet float (705) is mounted on one end of the monitoring rod (702) located in the hollow channel (703) and matched with the waveguide wire (704), a detection coil (706) is mounted on one end of the monitoring rod (702) located in the hollow channel (703) and matched with the permanent magnet float (705), and the detection coil (706) is electrically connected with the data processor (701).
8. A hydraulic cylinder with displacement monitoring according to claim 7, characterized in that A sealing ring (707) is provided between the open end of the hollow channel (703) and the monitoring rod (702), an installation groove (708) matched with the data processor (701) is formed in the outside of the closed cylinder cover (2), and a communication interface (709) is provided on the outside of the data processor (701).