Cylinder piston position detection device
By integrating the cylinder and test probe assembly into one unit, and designing a conductive outer tube, probe, piston, moving needle, and tail needle, the piston is driven by compressed air to form a circuit. This solves the problems of large size and inconvenient processing and assembly in existing technologies, and enables rapid detection within a compact structure.
Patent Information
- Application Number
- CN202520238100.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-14
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-02-14
AI Technical Summary
Existing cylinder piston position detection devices are large in size, making them inconvenient to manufacture and design, and cannot be used in a compact structure. They also require temporary assembly.
The cylinder and test probe assembly are integrated into one unit, with a conductive outer tube, probe, piston, moving probe and tail needle. The piston is driven by compressed air, and the moving probe forms a circuit with the probe for detection. This eliminates the need for an external cylinder, resulting in a smaller size and easier assembly.
It enables rapid and convenient testing within a compact structure, reduces the size of the device, eliminates temporary assembly steps, and simplifies operation.
Smart Images
Figure CN223770413U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a detection device, and more particularly to a cylinder piston position detection device. Background Technology
[0002] To detect the presence of the analyte, existing technology uses... Figure 1 As shown, the switch test probe assembly 200 is mounted on the slider 300, which is mounted on the front end of the push rod of the cylinder 100. The switch test probe assembly 200 has a needle core 210, a tail needle 220, an insulator 230, and an outer sleeve 240. The outer sleeve 240 is fixed to the slider 300 and has a central hole 241. The needle core 210 and the tail needle 220 are inserted into the central hole 241. The rear end of the needle core 210 and the front end of the tail needle 220 are located inside the central hole 241, and a spring 250 is provided between them. The front end of the needle core 210 and the rear end of the tail needle 220 extend out of the central hole 241, and the needle core 210 contacts the outer sleeve 240. An insulator 230 is provided between the tail needle 220 and the outer sleeve 240.
[0003] In the prior art, both the tail needle 220 and the outer sleeve 240 are connected to the detection circuit (not shown in the figure) via wires. When the cylinder 100 pushes the slider 300, the switch test needle assembly 200 moves forward and approaches the object under test 400. At this time, the needle core 210 is compressed backward, so that the needle core 210 touches the tail needle 220. Since the outer sleeve 240, the needle core 210, and the tail needle 220 are all conductive objects, the needle core 210 makes the tail needle 220 and the outer sleeve 240 conductive, thus forming a circuit, thereby proving the existence of the object under test 400.
[0004] It is easy to see that existing technologies are large in size, inconvenient to process and design, require temporary assembly, and cannot be used in compact structures, thus necessitating improvement. In view of this, the inventor, drawing on extensive experience accumulated over many years in the field of detection devices, conducted in-depth research on existing detection devices and developed and designed a cylinder piston position detection device, which leads to this invention. Utility Model Content
[0005] The purpose of this invention is to provide a cylinder piston position detection device that is miniaturized, easy to process and design, requires no temporary assembly, can be used in a compact structure, and provides convenient and fast detection.
[0006] To achieve the above objectives, the solution of this utility model is:
[0007] A cylinder piston position detection device includes a conductive outer tube, a probe, a piston, a moving needle, a tail needle, and insulating sleeves for the moving needle and tail needle. The outer tube has openings at both ends. A piston is installed at the front end of the outer tube, and the tail needle insulating sleeve is fixed at the rear end. The piston and tail needle insulating sleeve are sealed to the inner wall of the outer tube. A piston return spring is also provided between the piston and the outer tube. An air inlet is opened in the middle section of the outer tube wall to allow airflow to enter the outer tube and drive the piston. An axial through hole is opened on the tail needle insulating sleeve, and the tail needle is inserted into the axial through hole, with both ends extending out of the axial through hole. An axial through hole is opened on the piston, and a retractable probe is inserted at the front end of the axial through hole. The moving needle insulating sleeve is fixed at the rear end of the axial through hole, and a probe return spring is also provided in the middle of the axial through hole. An axial through hole is opened on the moving needle insulating sleeve, and the moving needle is inserted into the axial through hole, with both ends extending out of the axial through hole. The rear end of the moving needle is always sleeved with the front end of the tail needle.
[0008] In use, both the tail needle and the outer tube are connected to the detection circuit via wires. Compressed air is supplied to the outer tube through the air inlet. The piston is pushed forward (to the object being measured) by the compressed air. The probe, moving needle, and moving needle insulating sleeve move together with the piston. When the probe touches the object being measured, it stops moving, but the piston continues to move under the action of compressed air, thus making the moving needle contact the probe to form a circuit. The rear end of the moving needle and the front end of the tail needle are always connected (for example, the two always maintain an elastic clamp), and the circuit remains conductive even during the movement of the moving needle. In this way, the outer tube, piston, probe, moving needle, and tail needle form a circuit, which can be used to determine the presence of the object.
[0009] Furthermore, the front end opening of the outer tube is constricted, while the rear end opening is open; the rear end of the outer tube is covered with an insulating shell, and the insulating shell forms an air nozzle corresponding to the air inlet of the outer tube, and the insulating shell forms a tail needle hole corresponding to the tail needle for the rear end of the tail needle to extend out.
[0010] Furthermore, an outer step is formed on the piston, and the two ends of the piston return spring abut against the front opening of the outer tube and the outer step of the piston.
[0011] Furthermore, the piston axial through hole forms an inner convex ring at the front port to reduce the diameter of the front end, and the probe forms a corresponding probe step to limit the travel of the probe in the piston axial through hole and prevent the probe from coming out of the piston axial through hole.
[0012] Furthermore, the front end of the moving needle forms a large head, and when the moving needle is inserted into the axial through hole of the moving needle, the large head of the moving needle is stuck on the axial through hole of the moving needle.
[0013] Furthermore, when the piston is not in operation, it is in contact with the tail needle insulating sleeve by the action of the piston return spring. The tail needle insulating sleeve forms an annular air groove, so that the front end area of the tail needle insulating sleeve is smaller than the rear end area of the piston, and the air inlet is directly opposite the annular air groove.
[0014] Furthermore, the front end of the tail needle forms a moving needle insertion hole, and the rear end of the moving needle is inserted into the moving needle insertion hole to form an elastic clamp.
[0015] By adopting the above solution, this utility model integrates the cylinder and test probe assembly together, eliminating the need for an external cylinder. When in use, it is only necessary to connect the air inlet to the air pump to supply air. When not in use, the connection can be removed. The overall size of the device is greatly reduced, which is convenient for processing and design. There is no need to temporarily assemble a large-volume cylinder. Such a compact device can be used in a compact structure, and the operation is very convenient and fast.
[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments are briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0018] Figure 1 This is an exploded 3D view of the existing detection device;
[0019] Figure 2 This is a schematic diagram of the structure of this utility model;
[0020] Figure 3 yes Figure 2 Local magnification Figure 1 ;
[0021] Figure 4 yes Figure 2 Local magnification Figure 2 ;
[0022] Figure 5 yes Figure 2 Local magnification Figure 3 .
[0023] Label Explanation
[0024] 100----Cylinder, 200----Switch test probe assembly, 210----Needle core, 220----Tail needle, 230----Insulator, 240----Outer jacket, 241----Center hole, 250----Spring, 300----Slider, 400----Object under test;
[0025] 1----Outer tube, 11----Air inlet;
[0026] 2----probe, 21----probe step;
[0027] 3----Piston, 31----Piston axial through hole, 32----Outer step, 33----Inner convex ring, sealing ring 34;
[0028] 4----Moving needle, 41----Large head;
[0029] 5----tail pin, 51----moving pin insertion hole;
[0030] 6----Moving needle insulating sleeve, 61----Moving needle axial through hole;
[0031] 7----tail needle insulating sleeve, 71----tail needle axial through hole, 72----annular air groove;
[0032] 8----Piston return spring;
[0033] 9----Probe reset spring;
[0034] 10----Insulating outer shell, 101----Air nozzle, 102----Tail pin hole. Detailed Implementation
[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.
[0036] It should be noted that the terms front, back, inside, outside, top, bottom, left, right, first, second, third, etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the technical features indicated, unless otherwise explicitly defined.
[0037] This article defines the direction closer to the inspection station as "front" and the direction farther from the inspection station as "back". The terms "front" and "back" are only relative positions and are used to facilitate the description of the structure, not as a limitation on the technical solution. The front and back can be interchanged without affecting the overall structure.
[0038] like Figures 1 to 5 As shown, this utility model discloses a cylinder piston position detection device, including a conductive outer tube 1, a probe 2, a piston 3, a moving needle 4 and a tail needle 5, and also includes a moving needle insulating sleeve 6 and a tail needle insulating sleeve 7.
[0039] The outer tube 1 has openings at both its front and rear ends. A piston 3 is installed at the front end of the outer tube 1, and a tail needle insulating sleeve 7 is fixed at the rear end of the outer tube 1. The piston 3 and the tail needle insulating sleeve 7 are respectively sealed to the inner wall of the outer tube 1. Furthermore, a sealing ring 34 can be installed between the piston 3 and the inner wall of the outer tube 1 to ensure the effective action of compressed air on the piston 3 during operation. A piston return spring 8 is also provided between the piston 3 and the outer tube 1. An air inlet 11 is opened in the middle section of the outer tube 1 to allow airflow to enter the outer tube 1 and drive the piston 3 to move.
[0040] The tail needle insulating sleeve 7 has an axial through hole 71, the tail needle 5 is inserted into the axial through hole 71, and the front and rear ends of the tail needle 5 extend out of the axial through hole 71.
[0041] The piston 3 has an axial through hole 31. A retractable probe 2 is inserted through the front section of the axial through hole 31, and a moving needle insulating sleeve 6 is fixed at the rear section of the axial through hole 31. A probe return spring 9 is also provided in the middle of the axial through hole 31 so that the probe 2 remains in the extended state when it is not under force (the probe 2 does not touch the object 400 being measured).
[0042] The moving needle insulating sleeve 6 has a moving needle axial through hole 61, the moving needle 4 is inserted into the moving needle axial through hole 61, and the front and rear ends of the moving needle 4 extend out of the moving needle axial through hole 61. The front end of the moving needle 4 is for contact with the probe 2 during operation, and the rear end of the moving needle 4 is always sleeved with the front end of the tail needle 5 so that the two are in a conductive state.
[0043] This invention further optimizes the structure and facilitates assembly. The front opening of the outer tube 1 is constricted, while the rear opening is open. The rear end of the outer tube 1 is covered by an insulating shell 10, and the insulating shell 10 forms an air nozzle 101 corresponding to the air inlet 11 of the outer tube 1. The insulating shell 10 also forms a tail needle hole 102 corresponding to the tail needle 5 for the rear end of the tail needle 5 to extend out. During assembly, the components are sequentially installed into the outer tube 1 through the open rear end, and then the insulating shell 10 is covered over the rear end of the outer tube 1 to position the components within the outer tube 1, thus facilitating assembly.
[0044] The present invention further forms an outer step 32 on the piston 3, and the two ends of the piston return spring 8 abut against the front opening of the outer tube 1 and the outer step 32 of the piston 3 to ensure the stable operation of the piston 3.
[0045] The present invention further forms an inner convex ring 33 at the front port of the piston axial through hole 31, thereby reducing the diameter of the front end of the piston axial through hole 31. The probe 2 is correspondingly formed with a probe step 21. With the help of this mating structure, the travel of the probe 2 in the piston axial through hole 31 can be limited, preventing the probe 2 from coming out of the piston axial through hole 31.
[0046] The present invention further forms a large head 41 at the front end of the moving needle 4. When the moving needle 4 is inserted into the axial through hole 61 of the moving needle, the large head 41 of the moving needle 4 is stuck on the axial through hole 61 of the moving needle, so that the piston 3 can smoothly move the moving needle 4.
[0047] This utility model is further designed so that when not in operation, the piston 3 is brought into contact with the tail needle insulating sleeve 7 by the action of the piston return spring 8. The tail needle insulating sleeve 7 forms an annular air groove 72, so that the front end area of the tail needle insulating sleeve 7 is smaller than the rear end area of the piston 3. The air inlet 11 is directly opposite the annular air groove 72, so that after the compressed air enters the outer tube 1, it can pass through the annular air groove 72 and reach the rear end face of the piston 3 smoothly, effectively driving the piston 3 to work.
[0048] The present invention further forms a movable needle insertion hole 51 at the front end of the tail needle 5, and the rear end of the movable needle 4 is inserted into the movable needle insertion hole 51 to form an elastic clamping, ensuring that the movable needle 4 and the tail needle 5 remain in a conductive state.
[0049] This invention integrates the cylinder and test probe assembly, eliminating the need for an external cylinder. During use, only the air inlet 11 needs to be connected to an air pump for air supply; when not in use, the connection can be removed. The overall size of the device is significantly reduced, facilitating manufacturing and design. It eliminates the need for temporary assembly of a large cylinder, allowing for convenient use within a compact structure. In practical use, the tail needle 5 and outer tube 1 are connected to a detection circuit (not shown in the figure) via wires. Compressed air is supplied to the outer tube 1 through the air inlet 11. The piston 3 is propelled forward by the compressed air towards the object 400 being tested. The piston 3 carries the probe 2, moving needle 4, and moving needle insulating sleeve 6, all housed within it, along with the probe. When the probe 2 touches the object 400, it stops moving. At this point, the piston 3 continues to move under the action of compressed air, causing the moving needle 4 to contact the probe 2, forming a circuit. Thus, the conductive outer tube 1, piston 3, probe 2, moving needle 4, and tail needle 5 form a circuit, allowing the presence of the object to be determined.
[0050] The embodiments described above are only for illustrating the technical ideas and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly, but they do not limit the patent scope of this utility model. All equivalent changes or modifications made in accordance with the spirit disclosed in this utility model should still be covered within the patent scope of this utility model.
Claims
1. A cylinder piston position detection device, characterized by: The application relates to a conductive outer tube, a probe, a piston, a moving needle and a tail needle, and a moving needle insulation sleeve and a tail needle insulation sleeve; the front and rear ends of the outer tube are respectively provided with openings, the front section of the outer tube is provided with the piston and the rear section is fixed with the tail needle insulation sleeve, the piston and the tail needle insulation sleeve are respectively in sealing cooperation with the inner wall of the outer tube, a piston return spring is arranged between the piston and the outer tube, a gas inlet hole is arranged in the middle section of the wall of the outer tube to allow gas flow to enter the outer tube and push the piston to move; an axial through hole is arranged in the tail needle insulation sleeve, the tail needle is inserted into the axial through hole, and the front and rear ends of the tail needle extend out of the axial through hole; an axial through hole is arranged in the piston, a retractable probe is arranged in the front section of the axial through hole, the rear section of the axial through hole is fixed with the moving needle insulation sleeve, and a probe return spring is arranged in the middle section of the axial through hole; an axial through hole is arranged in the moving needle insulation sleeve, the moving needle is inserted into the axial through hole, and the front and rear ends of the moving needle extend out of the axial through hole, and the rear end of the moving needle is always sleeved with the front end of the tail needle.
2. A cylinder piston position detection device according to claim 1, characterized in that The front end opening of the outer tube is in the shape of a neck, and the rear end opening is in the shape of an open mouth; the rear end of the outer tube is covered with an insulation shell, and the insulation shell forms a gas nozzle corresponding to the gas inlet hole of the outer tube, and forms a tail needle hole corresponding to the tail needle for the rear end of the tail needle to extend out.
3. A cylinder piston position detection device according to claim 1 or 2, characterized in that An outer step is formed on the piston, and the two ends of the piston return spring abut against the front end opening of the outer tube and the outer step of the piston.
4. A cylinder piston position detection device according to claim 1, characterized in that: The piston axial through hole is formed with an inner convex ring at the front end to reduce the caliber of the front end, and the probe is correspondingly formed with a probe step for limiting the stroke of the probe in the piston axial through hole and preventing the probe from being pulled out of the piston axial through hole.
5. A cylinder piston position detection device according to claim 1, characterized in that: The front end of the moving needle is formed with a large head part, and the large head part of the moving needle is clamped on the moving needle axial through hole when the moving needle is inserted into the moving needle axial through hole.
6. A cylinder piston position detection device according to claim 1, characterized in that: The piston is in contact with the tail needle insulation sleeve under the action of the piston return spring when the piston is not working, the tail needle insulation sleeve forms an annular air groove, the front end area of the tail needle insulation sleeve is smaller than the rear end area of the piston, and the gas inlet hole is opposite to the annular air groove.
7. A cylinder piston position detection device according to claim 1, characterized in that: The front end of the tail needle is formed with a moving needle insertion hole, and the rear end of the moving needle is inserted into the moving needle insertion hole to form elastic clamping.