Oil cylinder stroke in-place detection device
By setting a detection mechanism at the bottom of the oil cylinder, and detecting the piston position in the cylinder cavity using induction switches and limit seats, the problem that the detection device in the prior art is susceptible to the surrounding environment, and accurate control of the piston position is achieved.
Patent Information
- Application Number
- CN202420206781.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-29
- Publication Date
- 2025-02-21
- Estimated Expiration
- 2034-01-29
AI Technical Summary
The existing cylinder stroke detection device is susceptible to the surrounding environment, resulting in mis-signal or non-signal, affecting the accurate control of the piston.
A cylinder stroke in place detection device is designed. By setting a detection mechanism at the bottom of the cylinder, the piston position is detected in the cylinder cavity by using induction switches and limit seats to avoid the detection mechanism being affected by the surrounding environment.
Ensure that the piston stroke is stopped only after it is in place, avoid control errors caused by mis-signal or non-signal, and improve the reliability of the use of the oil cylinder.
Smart Images
Figure CN222513625U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oil cylinder stroke detection equipment, in particular to an oil cylinder stroke in-place detection device. Background Art
[0002] The oil cylinder is a linear motion actuator whose output force is proportional to the effective area of the piston and the pressure difference on both sides. It is a hydraulic actuator that converts hydraulic energy into mechanical energy. The input of the oil cylinder is the flow rate and pressure of the fluid, and the output is the linear motion speed and force, allowing the piston to complete linear reciprocating motion inside the oil cylinder. It has the advantages of large output and smooth movement, and is widely used in the chassis leveling systems of various types of engineering machinery vehicles, missile launchers, and radar antenna vehicles.
[0003] However, in order to facilitate the use of the oil cylinder, most of the existing oil cylinders use pressure relays to detect whether the piston has reached its stroke. After the fluid pressure inside the oil cylinder reaches the set value of the pressure relay, the pressure relay sends a signal to the controller, and the controller controls the piston to stop moving. However, since the pressure relay is easily affected by the surrounding environment (such as high temperature, high pressure and vibration, etc.), the pressure relay is prone to sending wrong signals or not sending signals, which will cause the piston to stop moving before it is recovered or continue to move after the piston has reached its stroke, affecting the use of the oil cylinder. Therefore, those skilled in the art provide a cylinder stroke detection device to solve the problems raised in the above background technology. Utility Model Content
[0004] The utility model aims to provide a device for detecting the arrival of a cylinder stroke, so as to solve the problems raised in the above-mentioned background technology.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] The piston rod of the piston rod has the shape of a circle, and the groove of the groove of the groove is formed on the top of the piston rod, and the groove of the groove is connected with the top of the piston rod to form a circle.
[0007] Preferably, the outer walls of the fixing cylinder and the induction switch are respectively provided with a first annular groove and a second annular groove, and the first O-ring and the second O-ring are respectively inserted into the first annular groove and the second annular groove and closely attached to the inner walls of the mounting hole and the fixing cylinder.
[0008] Preferably, a through opening is opened in the middle position of the limit seat, and the limit seat is sleeved on the outer wall of the fixed cylinder through the through opening, and an annular groove is opened around the lower end surface of the limit seat outside the through opening, and the limit seat is mounted on the top of the annular limit plate through the annular groove.
[0009] Preferably, a thread groove is provided inside the fixing cylinder, and the induction switch is threadably installed inside the thread groove and extends to the bottom of the fixing cylinder.
[0010] Preferably, a limit nut is provided at one end of the induction switch located above the fixing tube, the limit nut is threadedly installed on the outer wall of the induction switch and tightly attached to the upper end surface of the fixing tube, and the internal thread of the limit nut is opposite to the internal thread of the thread groove.
[0011] Preferably, a spring washer is sleeved on the outer wall of the screw rod of the fastening bolt, the diameter of the spring washer is smaller than the diameter of the nut of the fastening bolt, and the fastening bolt is pressed against the top of the spring washer through the nut.
[0012] Preferably, a rectangular groove is formed on the outer wall of the cylinder body around the outside of the mounting hole, and the limiting seat is installed on the outer wall of the cylinder body by fastening bolts and is clamped in the inside of the rectangular groove.
[0013] Compared with the prior art, the advantages of the utility model are:
[0014] By arranging a detection mechanism at the bottom of the oil cylinder, when in use, the induction switch can be installed in the fixed cylinder through the threaded groove, the detection end of the induction switch can be moved to the bottom of the fixed cylinder, and then the limit nut can be installed on the outer wall of the induction switch and tightly attached to the upper end surface of the fixed cylinder, so as to complete the limit of the induction switch, and then the fixed cylinder can be inserted into the mounting hole, and the fixed cylinder can be limited by the annular limit plate, so that the detection end of the induction switch can be extended to the inner cavity of the cylinder body, and then the limit seat can be sleeved on the outside of the fixed cylinder through the through hole, so that the limit seat can be clamped on the top of the annular limit plate through the annular groove, and the annular limit plate can be pressed tightly against the opening of the mounting hole. Finally, turn the fastening bolts at the four corners of the limit seat in turn to fix the limit seat in the rectangular groove, thereby completing the installation of the detection mechanism, allowing the induction switch to detect the position of the piston in the inner cavity of the cylinder body, changing the detection method of whether the piston stroke is in place, and preventing the detection mechanism from being affected by the surrounding environment, ensuring that the piston stops moving only after the stroke is in place, avoiding the situation where the controller controls the piston to stop moving before it is recovered or the piston continues to move after the stroke is in place due to the pressure relay being affected by the surrounding environment and sending erroneous signals or not sending signals, thereby ensuring the use of the oil cylinder, with a simple structure, convenient installation and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a three-dimensional schematic diagram of an oil cylinder according to an embodiment of the utility model;
[0016] Figure 2 It is a three-dimensional schematic diagram of a detection mechanism according to an embodiment of the utility model;
[0017] Figure 3 It is a schematic diagram of the connection between the detection mechanism and the cylinder body according to an embodiment of the utility model;
[0018] Figure 4 It is a three-dimensional schematic diagram of a limit seat according to an embodiment of the utility model;
[0019] Figure 5 It is a three-dimensional schematic diagram of a fixing cylinder according to an embodiment of the utility model;
[0020] Figure 6 It is a three-dimensional schematic diagram of an induction switch according to an embodiment of the utility model.
[0021] In the figure: 1, cylinder body; 101, mounting hole; 102, rectangular groove; 2, detection mechanism; 21, fixing cylinder; 211, threaded groove; 212, annular limit plate; 213, first annular groove; 22, induction switch; 221, second annular groove; 23, limit seat; 231, through port; 232, annular groove; 24, first O-ring; 25, second O-ring; 26, limit nut; 27, fastening bolt; 28, spring washer. DETAILED DESCRIPTION
[0022] In the description of the present utility model, it should be understood that the terms "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more. In addition, the term "including" and any variation thereof are intended to cover non-exclusive inclusions.
[0023] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the bottom outer wall of the cylinder body 1 is provided with a mounting hole 101 connected to the inner cavity thereof, and the detection mechanism 2 comprises a fixing cylinder 21, a sensing switch 22 and a limiting seat 23, wherein the fixing cylinder 21 is inserted into the inside of the mounting hole 101, a thread groove 211 is provided inside the fixing cylinder 21, the sensing switch 22 is threadedly installed inside the thread groove 211 and extends to the bottom of the fixing cylinder 21 and is located on one side of the piston, and the outer wall of the fixing cylinder 21 located outside the cylinder body 1 is provided with an annular limiting plate 212, and the annular limiting plate 213 is provided on the outer wall of the fixing cylinder 21. The limiting plate 212 covers the opening of the mounting hole 101, and a through opening 231 is provided at the middle position of the limiting seat 23. The limiting seat 23 is sleeved on the outer wall of the fixing tube 21 through the through opening 231, and an annular groove 232 is provided on the lower end surface of the limiting seat 23 around the outside of the through opening 231. The limiting seat 23 is mounted on the top of the annular limiting plate 212 through the annular groove 232. Fastening bolts 27 are provided at the four corners of the limiting seat 23. The fastening bolts 27 penetrate the limiting seat 23 and are threadedly installed inside the cylinder body 1.
[0024] In one embodiment, when the detection mechanism 2 is installed on the cylinder body 1 for use, the induction switch 22 can be first installed in the threaded groove 211, so that one end of the induction switch 22 extends to the bottom of the fixed cylinder 21, and then the limit nut 26 is installed on the outer wall of the induction switch 22 and is close to the upper end surface of the fixed cylinder 21 to limit the position of the induction switch 22, and then the fixed cylinder 21 is inserted into the mounting hole 101, so that the annular limit plate 212 on the outer wall of the fixed cylinder 21 covers the opening of the mounting hole 101 and limits the position of the fixed cylinder 21, and then the limit seat 23 is sleeved on the outer wall of the fixed cylinder 21 through the through hole 231, so that the limit seat 23 passes through the annular limit plate 212 on the outer wall of the fixed cylinder 21. The groove 232 is engaged with the top of the annular limit plate 212, pressing the annular limit plate 212 tightly against the opening of the mounting hole 101. Finally, the fastening bolts 27 at the four corners of the limit seat 23 are turned in turn to fix the limit seat 23 in the rectangular groove 102. The installation of the detection mechanism 2 is completed, and the sensing switch 22 can detect the position of the piston in the inner cavity of the cylinder body 1, which changes the detection method of the piston stroke in place, prevents the detection mechanism 2 from being affected by the surrounding environment, and avoids the situation where the controller cannot accurately control the piston movement due to the pressure relay mistakenly sending a signal or not sending a signal due to the influence of the surrounding environment, thereby achieving accurate control of the piston.
[0025] In one embodiment, since the internal thread of the limit nut 26 is in opposite direction to the internal thread of the thread groove 211, after the sensing switch 22 is installed in the thread groove 211 inside the fixed cylinder 21, the limit nut 26 on the outer wall of the sensing switch 22 is turned to make the limit nut 26 close to the upper end surface of the fixed cylinder 21, so that the sensing switch 22 and the limit nut 26 can be in a state of being tightened to each other, and the sensing switch 22 will not be loose in the fixed cylinder 21, thereby avoiding the situation that the sensing switch 22 cannot detect that the piston stroke is in place due to the loose position of the sensing switch 22, thereby ensuring the stability of the installation of the sensing switch 22.
[0026] In one embodiment, when the limit seat 23 is fixed to the cylinder using the fastening bolt 27, the nut of the fastening bolt 27 is pressed against the upper end surface of the spring washer 28, and the spring washer 28 is pressed against the inside of the limit seat 23, which can increase the friction between the fastening bolt 27 and the limit seat 23, prevent the fastening bolt 27 from shaking, and ensure the stability of the installation of the limit seat 23.
[0027] In one embodiment, when detecting whether the piston has reached its stroke, the induction switch 22 can first detect the position of the piston in the inner cavity of the cylinder body 1, and send a signal that the piston has reached its stroke to the controller, which then controls the piston to stop moving. This ensures that the piston stops moving only after its stroke is in place, avoiding the trouble of the piston stopping before it is recovered or the piston still moving after its stroke is in place, thereby ensuring the use of the cylinder.
[0028] Combination Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the outer wall of the inductive switch 22 located inside the fixed cylinder 21 is sleeved with a second O-ring 25, and the second O-ring 25 is tightly attached to the inner wall of the fixed cylinder 21; the outer wall of the fixed cylinder 21 located inside the mounting hole 101 is sleeved with a first O-ring 24, and the first O-ring 24 is tightly attached to the inner wall of the mounting hole 101; and the outer walls of the fixed cylinder 21 and the inductive switch 22 are respectively provided with a first annular groove 213 and a second annular groove 221; the first O-ring 24 and the second O-ring 25 are respectively sleeved inside the first annular groove 213 and the second annular groove 221 and tightly attached to the inner walls of the mounting hole 101 and the fixed cylinder 21.
[0029] In one embodiment, when the fixing cylinder 21 and the sensing switch 22 are installed on the oil cylinder for use, the gap between the sensing switch 22 and the inner wall of the fixing cylinder 21 can be sealed by the second O-ring 25, and then the gap between the fixing cylinder 21 and the inner wall of the mounting hole 101 can be sealed by the first O-ring 24, which can prevent the oil inside the cylinder body 1 from leaking from the gap, avoid the trouble of affecting the use of the piston due to the leakage of oil from the gap, and ensure the sealing of the oil cylinder.
[0030] The working principle of the utility model is: when the piston stroke is in place, the induction switch 22 can detect the position of the piston in the inner cavity of the cylinder body 1, and send a signal that the piston is in place to the controller, and then the controller controls the piston to stop moving, which can ensure that the piston stops moving only after the piston stroke is in place, and changes the detection method of the piston stroke being in place, so that the detection mechanism 2 is not affected by the surrounding environment, and avoids the situation that the controller cannot accurately control the piston movement due to the pressure relay being affected by the surrounding environment and sending a signal by mistake or not sending a signal, thereby realizing accurate control of the piston, and has a simple structure, convenient installation, and strong practicality.
[0031] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A cylinder stroke detection device, comprising: A cylinder body (1) and a detection mechanism (2), characterized in that a mounting hole (101) communicating with an inner cavity of the cylinder body (1) is provided on the bottom outer wall thereof, and the detection mechanism (2) comprises a fixing cylinder (21), a sensing switch (22) and a limit seat (23), wherein the fixing cylinder (21) is inserted into the inside of the mounting hole (101), the sensing switch (22) is threadedly mounted inside the fixing cylinder (21) and extends to one side of the piston, and a second O-ring (25) is sleeved on a portion of the outer wall of the sensing switch (22) located inside the fixing cylinder (21), the second O-ring (25) is tightly attached to the inner wall of the fixing cylinder (21), and the outer wall of the fixing cylinder (21) A first O-ring (24) is sleeved on the portion located inside the mounting hole (101), and the first O-ring (24) is tightly attached to the inner wall of the mounting hole (101). An annular limiting plate (212) is provided on the portion of the outer wall of the fixing tube (21) located outside the cylinder body (1), and the annular limiting plate (212) covers the opening of the mounting hole (101). The limiting seat (23) is sleeved on the outer wall of the fixing tube (21) and is clamped on the top of the annular limiting plate (212). In addition, fastening bolts (27) are provided at the four corners of the limiting seat (23), and the fastening bolts (27) pass through the limiting seat (23) and are threadedly mounted inside the cylinder body (1).
2. The oil cylinder stroke detection device according to claim 1 is characterized in that: The outer walls of the fixing cylinder (21) and the inductive switch (22) are respectively provided with a first annular groove (213) and a second annular groove (221); the first O-ring (24) and the second O-ring (25) are respectively inserted into the first annular groove (213) and the second annular groove (221) and closely attached to the inner walls of the mounting hole (101) and the fixing cylinder (21).
3. The oil cylinder stroke detection device according to claim 1 is characterized in that: A through opening (231) is provided at the middle position of the limiting seat (23), and the limiting seat (23) is sleeved on the outer wall of the fixing tube (21) through the through opening (231). In addition, an annular groove (232) is provided on the lower end surface of the limiting seat (23) around the outside of the through opening (231), and the limiting seat (23) is mounted on the top of the annular limiting plate (212) by snapping into the annular groove (232).
4. The oil cylinder stroke detection device according to claim 1 is characterized in that: A thread groove (211) is provided inside the fixing cylinder (21), and the induction switch (22) is threadably mounted inside the thread groove (211) and extends to the bottom of the fixing cylinder (21).
5. The oil cylinder stroke detection device according to claim 4 is characterized in that: A limit nut (26) is provided at one end of the induction switch (22) located above the fixing tube (21); the limit nut (26) is threadedly mounted on the outer wall of the induction switch (22) and is tightly attached to the upper end surface of the fixing tube (21); and the internal thread of the limit nut (26) is in opposite direction to the internal thread of the thread groove (211).
6. The oil cylinder stroke detection device according to claim 1 is characterized in that: The outer wall of the screw rod of the fastening bolt (27) is sleeved with a spring washer (28), the diameter of the spring washer (28) is smaller than the diameter of the nut of the fastening bolt (27), and the fastening bolt (27) is pressed against the top of the spring washer (28) through the nut.
7. The oil cylinder stroke detection device according to claim 1, characterized in that: The outer wall of the cylinder body (1) is provided with a rectangular groove (102) surrounding the outside of the mounting hole (101); the limit seat (23) is mounted on the outer wall of the cylinder body (1) through the fastening bolt (27) and is clamped inside the rectangular groove (102).