Position feedback device, actuating device and equipment

Abstract

The utility model provides a position feedback device, and the device comprises a proximity switch which is used for detecting the displacement of a detected object; the proximity switch is arranged in the protection assembly, and the protection assembly is used for protecting the proximity switch. The utility model further provides an actuating device comprising the position feedback device and equipment comprising the actuating device. The corrosion resistance of the position feedback device is improved, the automatic detection of the actuating device is realized, the labor cost is saved, and the efficiency is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of mechanical equipment, and in particular to a position feedback device, an actuating device including the position feedback device, and a device including the actuating device. Background Art

[0002] Actuators include oil cylinders, pneumatic cylinders, electric cylinders, etc., which are commonly used actuators in mechanical equipment. During the operation of mechanical equipment, it is extremely important to ensure that the actuator runs to the predetermined working position. For example, the accidental displacement of the piston assembly in the oil cylinder can easily cause an accident, which may not only affect the normal operation, but also cause safety hazards.

[0003] How to detect whether the actuator has moved to a predetermined position has become a technical problem that needs to be solved urgently. Utility Model Content

[0004] Embodiments of the present disclosure provide a position feedback device, an actuating device including the position feedback device, and a device including the actuating device.

[0005] In a first aspect, an embodiment of the present disclosure provides a position feedback device, comprising: a proximity switch for detecting the displacement of a measured object; and a protection component, wherein the proximity switch is arranged inside the protection component, and the protection component is used to protect the proximity switch.

[0006] In some embodiments, the proximity switch includes a switch body, a switch cable, and a switch connector; the protective assembly includes a protective shell and a protective tube; the switch body is arranged inside the protective shell, and the switch cable is arranged inside the protective tube; one end of the protective tube is connected to the protective shell, and the other end is connected to the switch connector.

[0007] In some embodiments, the protection assembly further includes a first connecting member and a second connecting member; the protection tube is connected to the protection shell via the first connecting member; and the protection tube is connected to the joint via the second connecting member.

[0008] In some embodiments, the interior of the protective shell is filled with sealant.

[0009] In some embodiments, a glue injection hole is provided on the protective shell for injecting sealant into the interior of the protective shell.

[0010] In some embodiments, the switch connector comprises a waterproof connector.

[0011] In some embodiments, the position feedback device further comprises a bracket assembly, wherein the bracket assembly is used to support the position feedback device.

[0012] In some embodiments, the switch body and the protective shell are arranged at the first end of the position feedback device; the bracket assembly includes a support member and at least one limit member; the support member is provided with a mounting hole, and the first end of the position feedback device passes through the mounting hole; the limit member is fixedly connected to the first end, and the first end is fixedly connected to the support member.

[0013] In some embodiments, the connection position between the limiting member and the first end is adjustable to adjust the connection position between the supporting member and the first end.

[0014] In some embodiments, a threaded portion is provided on the outer wall of the protective shell, and the limiting member is threadably connected to the first end through the threaded portion and can move axially on the threaded portion.

[0015] In some embodiments, the outer shell of the switch body, the protective shell, and the bracket assembly are made of the same material.

[0016] In a second aspect, an embodiment of the present disclosure provides an actuating device, comprising: a cylinder body; a movable component, arranged inside the cylinder body and capable of axial movement; a position feedback device, arranged on the cylinder body and used to detect the displacement of the movable component, wherein the position feedback device is the position feedback device described in the first aspect of the embodiment of the present disclosure.

[0017] In some embodiments, a through hole is provided on the cylinder body; and the position feedback device is at least partially installed in the through hole.

[0018] In some embodiments, the cylinder body includes a tubular portion and a flange portion, and the through hole is obliquely disposed at a position where the tubular portion and the flange portion intersect.

[0019] In some embodiments, the bracket assembly of the position feedback device includes a support member and at least one limit member; the support member is provided with a mounting hole, and the first end of the position feedback device passes through the mounting hole; the limit member is fixedly connected to the first end, and the first end is fixedly connected to the support member; the first end of the position feedback device is at least partially installed in the through hole, and the support member is fixedly connected to the cylinder body.

[0020] In some embodiments, the position feedback device is connected to a cathodic protection system of the actuating device.

[0021] In some embodiments, the actuating device includes: a driving mechanism, a transmission assembly, and a locking mechanism; the transmission assembly can be driven by the driving mechanism to move axially, and can also be driven axially by manual operation; the transmission assembly drives the locking mechanism to move axially.

[0022] In some embodiments, the movable component is the locking mechanism.

[0023] In some embodiments, the driving mechanism includes a cylinder assembly and an axial sleeve; the axial sleeve includes a tubular portion and a flange portion arranged at one end of the tubular portion of the axial sleeve; the cylinder assembly includes a piston; a supporting groove is arranged at one end of the piston, and a boss matching the supporting groove is arranged on the flange portion of the axial sleeve, and a supporting member is fixedly connected to the end of the piston where the supporting groove is arranged, and the boss is limited in the supporting groove; a first target surface is arranged on the supporting member facing the sensing surface of the proximity switch in the position feedback device, and the first target surface is parallel to the sensing surface.

[0024] In some embodiments, the driving mechanism includes a cylinder assembly and an axial sleeve; the axial sleeve includes a tubular portion and a flange portion arranged at one end of the tubular portion of the axial sleeve; the cylinder assembly includes a piston; one end of the piston is fixedly connected to the flange portion of the axial sleeve by screws; the flange portion of the axial sleeve is provided with a second target surface facing the position of the sensing surface of the proximity switch in the position feedback device, and the second target surface is parallel to the sensing surface.

[0025] In a third aspect, an embodiment of the present disclosure provides a device, which includes the actuating device described in the second aspect of the embodiment of the present disclosure.

[0026] In the position feedback device provided in the embodiment of the present disclosure, a protection component is provided to protect the proximity switch, so that the position feedback device is safer and more reliable, and can be used in complex environments such as seawater; the position feedback device as a whole can be connected to the cathodic protection system to reduce corrosion; the proximity switch is arranged inside the protection component, which reduces the waterproof and corrosion-resistant requirements of the proximity switch itself, which is beneficial to reduce costs while ensuring the detection performance of the proximity switch; the protection component also provides protection for the cables of the proximity switch, eliminating the risk of damage by external forces such as wave loads; a bracket assembly for support is also provided on the position feedback device, which can install the position feedback device as a whole on the outside of the actuator, reducing the influence of the position feedback device on the inside of the actuator, and making it easier to repair and replace the position feedback device; because the position feedback device can be used in complex environments such as seawater, the application conditions of the actuator using the position feedback device in the embodiment of the present disclosure are expanded, and the maintenance cost of the actuator can be saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a front cross-sectional view of a position feedback device in an embodiment of the present disclosure;

[0028] Figure 2 is a front view of a position feedback device in an embodiment of the present disclosure;

[0029] Figure 3 is a front view of an actuating device in an embodiment of the present disclosure;

[0030] Figure 4 is a partial cross-sectional view of an actuating device in an embodiment of the present disclosure;

[0031] Figure 5 is a front view of a cylinder body in an embodiment of the present disclosure;

[0032] Figure 6 yes Figure 5 Left side view of the middle cylinder body;

[0033] Figure 7 is along Figure 6 A partial enlarged schematic diagram of the section along the middle section line EE;

[0034] Figure 8 is a schematic diagram of the installation of a position feedback device in an embodiment of the present disclosure;

[0035] Fig. 9 is a front view of a limiting device in an embodiment of the present disclosure;

[0036] Fig.10 is a three-dimensional diagram of a position limiting device in an embodiment of the present disclosure;

[0037] Fig.11 is a front cross-sectional view of a position limiting device in an embodiment of the present disclosure;

[0038] Fig.12 is a cross-sectional view of a locking mechanism in an embodiment of the present disclosure;

[0039] Fig.13 It is a front cross-sectional view of another limiting device in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the technical solution of the present disclosure is described in detail below with reference to the accompanying drawings.

[0041] Example embodiments will be described more fully below with reference to the accompanying drawings, but the example embodiments may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. On the contrary, the purpose of providing these embodiments is to make the present disclosure thorough and complete and to enable those skilled in the art to fully understand the scope of the present disclosure.

[0042] In the absence of conflict, the various embodiments of the present disclosure and the various features therein may be combined with each other.

[0043] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0044] The terms used herein are only used to describe specific embodiments and are not intended to limit the present disclosure. As used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise. It will also be understood that when the terms "comprising" and / or "made of" are used in this specification, the presence of the features, wholes, steps, operations, elements and / or components is specified, but the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof is not excluded.

[0045] The embodiments described herein may be described with reference to plan views and / or cross-sectional views by means of idealized schematic diagrams of the present disclosure. Therefore, the example illustrations may be modified according to manufacturing techniques and / or tolerances. Therefore, the embodiments are not limited to the embodiments shown in the accompanying drawings, but include modifications of the configurations formed based on the manufacturing process. Therefore, the regions illustrated in the accompanying drawings have schematic properties, and the shapes of the regions shown in the figures illustrate the specific shapes of the regions of the elements, but are not intended to be limiting.

[0046] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted as having an idealized or overly formal meaning unless explicitly defined as such herein.

[0047] Figure 1 and Figure 2 is a schematic diagram of a position feedback device in an embodiment of the present disclosure, wherein: Figure 1 This is the front sectional view of the position feedback device. Figure 2 It is the front view of the position feedback device.

[0048] In the embodiment of the present disclosure, the position feedback device includes: a proximity switch 11, which is used to detect the displacement of the object to be measured. The embodiment of the present disclosure does not specifically limit how the proximity switch 11 detects the displacement of the object to be measured. For example, when the displacement of the object to be measured is detected, the proximity switch 11 can issue an electrical instruction in time to issue an alarm or perform control; a protection component 12, the proximity switch 11 is arranged inside the protection component 12, and the protection component 12 can protect the proximity switch. For example, the protection component 12 can prevent the corrosion of the proximity switch 11 by air, water, etc., and can also prevent damage to the proximity switch 11 by external forces.

[0049] In some embodiments, the position feedback device provided by the embodiments of the present disclosure is applied in seawater, and the protection component 12 can protect the proximity switch 11 to prevent the seawater from corroding the proximity switch 11 and avoid the risk of the proximity switch 11 being damaged by external forces such as wave loads.

[0050] In the embodiment of the present disclosure, the proximity switch 11 includes a switch body 111, a switch cable 112, and a switch connector 113; the protective component 12 includes a protective shell 121 and a protective tube 122; the switch body 111 is arranged inside the protective shell 121, and the switch cable 112 is arranged inside the protective tube 122; one end of the protective tube 122 is connected to the protective shell 121, and the other end is connected to the switch connector 113.

[0051] In some embodiments, the protection tube 122 is a hose made of a flexible material and can protect the switch cable 112 to prevent the switch cable 112 from being damaged by external forces such as sea waves.

[0052] In some embodiments, the protection assembly 12 further includes a first connection member 123 and a second connection member 124 ; the protection tube 122 is connected to the protection shell 121 via the first connection member 123 ; and the protection tube 122 is connected to the switch connector 113 via the second connection member 124 .

[0053] In some embodiments, the first connector 123 is sealed to the protection tube 122 and the protection shell 121, and the second connector 124 is sealed to the protection tube 122 and the switch connector 113. For example, the connection between the protection tube 122 and the protection shell 121 and the switch connector 113 can be strengthened, and seawater can be prevented from entering the protection shell 121 and the protection tube 122 to corrode the proximity switch 11.

[0054] In some embodiments, the first connecting member 123 is a flange structure, connecting the protection tube 122 to the protection shell 121 ; the second connecting member 124 is a flange structure, connecting the protection tube 122 to the switch connector 113 .

[0055] In some embodiments, a glue injection hole 121 a is provided on the protective shell 121 , and sealant is injected into the protective shell through the glue injection hole 121 a , so as to seal the gap between the protective shell 121 and the switch body 111 .

[0056] In the disclosed embodiment, a bracket assembly 13 is further provided on the position feedback device, which is used to install the position feedback device on an actuating device such as an oil cylinder and to support the position feedback device.

[0057] In some embodiments, the switch body 111 and the protective shell 121 are arranged at the first end of the position feedback device; the bracket assembly 13 includes a support member 131 and at least one limit member 132; a mounting hole is provided on the support member 131, and the first end of the position feedback device passes through the mounting hole; the limit member 132 is fixedly connected to the first end, and the first end is fixedly connected to the support member 131.

[0058] In the embodiment of the present disclosure, the connection position between the stopper 132 and the first end is adjustable, so that the connection position between the support member 131 and the first end can be adjusted. When the position feedback device is mounted on the actuator, the position of the support member 131 at the first end is changed by adjusting the position of the stopper 132, so that the distance between the sensing surface of the proximity switch 11 and the object to be measured can be adjusted, thereby ensuring that the displacement of the object to be measured can be effectively detected.

[0059] In some embodiments, the bracket assembly 13 includes two stoppers 132, which are respectively located on both sides of the support member 131 after being installed to the first end, so as to connect and fix the support member 131 to the position feedback device. The stopper 132 can be implemented as a nut; a threaded portion is provided on the outer wall of the protective shell 121, and the stopper 132 is threadedly connected to the first end through the threaded portion, and can rotate around the axis and move axially, so as to achieve adjustable position of the stopper 132 and the support member 131.

[0060] In some embodiments, a fixing flange is provided on the protective shell 121, and a through hole is provided on the fixing flange. The limit member 132 is specifically implemented as a limit flange. The adjusting bolt connects the limit flange with the fixing flange through the through hole. By adjusting the adjusting bolt, the relative position of the support member 131 and the protective shell 121 can be adjusted, thereby adjusting the distance between the proximity switch and the object to be measured.

[0061] In some embodiments, a fixing flange is provided on the protective shell 121, and a through hole is provided on the fixing flange. The limiting member 132 is specifically implemented as a limiting flange. Bolts connect the limiting flange and the fixing flange through the through hole. A gasket is provided between the limiting flange and the fixing flange. By adjusting the bolts and the gaskets, the relative position of the support member 131 and the protective shell 121 can be adjusted, thereby adjusting the distance between the proximity switch and the object to be measured.

[0062] In the disclosed embodiment, the switch body 111, the protective shell 121, and the bracket assembly 13 are made of the same material, which can ensure that the potential difference between the three is the same. When the position feedback device is used in seawater, it can be connected to a cathodic protection system to prevent electrochemical corrosion and slow down the corrosion of the proximity switch 11 by seawater.

[0063] In the position feedback device provided in the embodiment of the present disclosure, a protection component is provided to protect the proximity switch, so that the position feedback device is safer and more reliable, and can be used in complex environments such as seawater; the position feedback device as a whole can be connected to the cathodic protection system to reduce corrosion; the proximity switch is arranged inside the protection component, which reduces the waterproof and corrosion-resistant requirements of the proximity switch itself, which is beneficial to reduce costs while ensuring the detection performance of the proximity switch; the protection component also provides protection for the cables of the proximity switch, eliminating the risk of damage by external forces such as wave loads; a bracket assembly for support is also provided on the position feedback device, which can install the position feedback device as a whole on the outside of the actuator, reducing the influence of the position feedback device on the inside of the actuator, and making it easier to repair and replace the position feedback device; because the position feedback device can be used in complex environments such as seawater, the application conditions of the actuator using the position feedback device in the embodiment of the present disclosure are expanded, and the maintenance cost of the actuator can be saved.

[0064] Figure 3 and Figure 4 is a schematic diagram of an actuating device in an embodiment of the present disclosure, wherein: Figure 3 is the front view of the actuator, Figure 4 It is a cross-sectional view of part of the structure of the actuator, showing a cross-sectional view of the position feedback device and a cross-sectional view of the installation position.

[0065] The actuating device of the disclosed embodiment includes: a cylinder body 2; a movable component disposed inside the cylinder body 2 and capable of axial movement; and a position feedback device 1 disposed on the cylinder body 2 and used to detect the displacement of the movable component.

[0066] Figures 5 to 7 Schematic diagram of the cylinder 2 in the embodiment of the present disclosure, wherein: Figure 5 is the front view of the cylinder 2, Figure 6 for Figure 5 Left view of the middle cylinder 2, Figure 7 For along Figure 6 A partial enlarged schematic diagram of the section along the center section line EE.

[0067] In the embodiment of the present disclosure, a through hole 23 is provided on the cylinder body 2 ; the position feedback device 1 is at least partially installed in the through hole 23 .

[0068] In some embodiments, the cylinder body 2 includes a tubular portion 21 and a flange portion 22 , and the through hole 23 is obliquely disposed at a position where the tubular portion 21 and the flange portion 23 intersect.

[0069] In the disclosed embodiment, the through hole 23 is tilted at the intersection of the tubular portion 21 and the flange portion 23, so that the position feedback device 1 can be tilted on the cylinder body 2, so that the sensing surface of the proximity switch 11 is aligned with the movable component, ensuring effective detection of the displacement of the movable component.

[0070] Figure 8 A schematic diagram of a position feedback device disposed in a through hole.

[0071] In the disclosed embodiment, the first end of the position feedback device 1 is at least partially installed in the through hole 23 , and the support member 131 of the bracket assembly 13 is fixedly connected to the cylinder body 2 , so that the position feedback device is installed on the cylinder body 2 .

[0072] When the position feedback device 1 is mounted on the cylinder body 2 , the sensing gap between the sensing surface of the proximity switch 11 and the movable component can be adjusted by adjusting the position of the limiter 132 to ensure the detection effect.

[0073] In some embodiments, the position feedback device is connected to the cathodic protection system of the actuator 1. The switch body 111, the protective shell 121, and the bracket assembly 13 are made of the same material and have the same potential difference. After being connected to the cathodic protection system of the entire machine, corrosion can be slowed down and the service life can be extended.

[0074] The limiting device is an implementation of the actuating device. Figures 9 and 10 is a schematic diagram of a limiting device in an embodiment of the present disclosure, wherein: Fig. 9 This is the front view of the limit device. Fig.10 It is a three-dimensional diagram of the limiting device.

[0075] Fig.11 It is a front cross-sectional view of a limiting device in an embodiment of the present disclosure.

[0076] In the disclosed embodiment, the limiting device includes a driving mechanism 3, a transmission assembly (driving bolt 4), and a locking mechanism 5; the driving bolt 4 can be driven by the driving mechanism 3 to move axially, and the driving bolt 4 can also be driven axially by manual operation; when the driving bolt 4 moves axially, it will drive the locking mechanism to move axially, thereby fixing and locking the limited object.

[0077] When the locking mechanism 5 is displaced, the locking of the limiting device on the limited object will loosen; and the locking mechanism 5 is coupled to the driving bolt 4 and the driving mechanism 3, and the displacement of the locking mechanism 5 will cause the driving bolt 4 and some components in the driving mechanism 3 to be displaced. Therefore, by detecting the displacement of the driving mechanism 3, the driving bolt 4, and the locking mechanism 5 through the position feedback device 1, it is possible to detect problems such as looseness of the limiting device.

[0078] The limit device provided in the embodiment of the present disclosure is provided with a position feedback device. When the movable component in the limit device is displaced, the proximity switch can perform real-time detection, so that problems such as looseness of the limit device can be discovered in time, thereby realizing automatic detection of the limit device, saving labor costs, improving efficiency, and ensuring the reliability of the support of the support tube.

[0079] In some embodiments, the locking mechanism 5 is used as a movable component, and the position feedback device 1 directly detects the displacement of the locking mechanism 5 .

[0080] In some embodiments, the driving mechanism 3 is used as a movable component, and the position feedback device 1 is used to detect the displacement of the component that moves with the locking mechanism 5, thereby determining whether the locking mechanism 5 is displaced, and detecting problems such as looseness of the limit device.

[0081] In such Figure 7 In the limiting device shown, the driving mechanism 3 includes a cylinder assembly, which includes a piston 31, and the piston 31 is "T"-shaped; the driving mechanism 3 also includes an axial sleeve 32, and the axial sleeve 32 includes a tubular portion 321 and a flange portion 322. A support groove is provided at one end of the piston 31, and a boss that cooperates with the support groove is provided on the flange portion 322; the support member 33 is fixedly connected to the end of the piston 31 provided with the support groove, and the boss is limited in the support groove, thereby fixing the piston 31 to the axial sleeve 32. A first target surface 331 is provided on the support member 33 at a position facing the sensing surface of the position feedback device 1, and the first target surface 331 is parallel to the sensing surface of the position feedback device 1, so that the position feedback device 1 can sense the displacement of the support member 33.

[0082] The following explains Figure 7 The structure of the limiting device shown.

[0083] like Figure 7 As shown, the limiting device mainly includes a cylinder body 2, a cylinder assembly, a driving bolt 4, and a locking mechanism 5. The inner sleeve 6 is fixedly connected to the cylinder body 2 by bolts, and the axial sleeve 32 is fixedly connected to the piston 31 by a support member 33.

[0084] Linear gear teeth (i.e., splines) are provided on the inner surface of the inner sleeve 6 and the outer surface of the axial sleeve 32, respectively, and the inner sleeve 6 and the axial sleeve 32 are meshed with each other through the gear teeth. When the axial sleeve 32 tends to rotate around the axis, it will be constrained by the gear teeth of the inner sleeve 6 and cannot rotate around the axis; however, the axial sleeve 32 can move axially under the drive of the piston 31.

[0085] The inner hole of the axial sleeve 32 is provided with an internal thread, and the external thread of the driving bolt 4 cooperates with the internal thread of the axial sleeve 32. When the axial sleeve 32 moves axially, it can drive the driving bolt 4 to move axially; when the driving bolt 4 rotates around the axis, the axial sleeve 32 does not move around the axis, and the axial sleeve 32 is threadedly connected with the driving bolt 4, which can convert the rotation of the driving bolt 4 around the axis into axial movement.

[0086] Fig.12 It is a front cross-sectional view of a locking mechanism in an embodiment of the present disclosure.

[0087] In the disclosed embodiment, the locking mechanism 5 includes a push head 51 , a core shaft 52 , a support shoe 53 , a retaining ring 54 , and an end piece 55 .

[0088] The end piece 55 is provided with an inner hole; the driving bolt 4 passes through the inner hole of the end piece 55 in a direction away from the core shaft 52; the end piece 55 is fixedly connected to the core shaft 52, thereby connecting and fixing the core shaft 52 to the driving bolt 4. The axial movement of the driving bolt 4 will drive the core shaft 53 to move axially.

[0089] The push head 51 is a cylindrical structure with an open mouth. A V-shaped spring 56 is arranged between the core shaft 52 and the end piece 55. The outer diameter of the V-shaped spring 56 matches the inner diameter of the limiting structure at the open mouth of the push head 51. A certain initial thrust is required to deform the V-shaped spring to push the core shaft 52 further into the push head 51. Before the push head 51 contacts the object to be limited, the force acting on the V-shaped spring 56 is less than the initial thrust, and the V-shaped spring 56 does not deform or deforms too little to enter the push head 51, so that the driving bolt 4 can both push the push head 51 to move to the right and prevent the core shaft 52 from being locked, thereby preventing the push head 51 from being locked before reaching the target position. When the push head 51 contacts the locked part, the push head 51 remains stationary, and the force acting on the V-shaped spring 56 becomes greater than the initial thrust. The V-shaped spring 56 is squeezed and deformed, and the core shaft 52 continues to move to the right relative to the push head 51, thereby squeezing the support shoe 53 into contact with the retaining ring 54, generating self-locking, so that the push head can withstand the reaction force of the limited object.

[0090] In the disclosed embodiment, Figure 7 The limiting device shown has a manual mode and a hydraulic mode, and is a dual-mode limiting device.

[0091] The locking process in manual mode is described below.

[0092] In the starting position, the locking mechanism 5 is in a retracted state.

[0093] The step of extending the push head 51 without load is as follows: by rotating the drive bolt 4 to move the drive bolt 4 axially, the locking mechanism 5 is pushed to extend as a whole, and the push head 51 contacts the restricted object, that is, reaches the predetermined position.

[0094] Locking steps: the push head 51 stops moving after contacting the object to be limited, and the driving bolt 4 continues to push the core shaft 52 to move axially; during the axial movement of the core shaft 52, the support shoe 53 is squeezed and moves radially, and the support shoe 53 is deformed under the constraint of the retaining ring 54 and contacts the retaining ring 54, generating a locking force, locking the push head 51 in a predetermined position, thereby achieving the purpose of limiting the object to be limited.

[0095] The locking process in hydraulic mode is described below.

[0096] In the starting position, the locking mechanism 5 is in a retracted state.

[0097] The steps of extending the push head 51 without load are as follows: the oil cylinder assembly is connected to the oil pressure to push the piston 31 and the driving bolt 4 to move axially, and the locking mechanism 5 is pushed out as a whole, and the push head 51 contacts the restricted object, that is, reaches the predetermined position.

[0098] Locking steps: the push head 51 stops moving after contacting the object to be limited, and the piston 31 continues to push the core shaft 52 to move axially by driving the bolt 4; during the axial movement of the core shaft 52, the support shoe 53 is squeezed and moves radially, and the support shoe 53 is deformed under the constraint of the retaining ring 54 and contacts the retaining ring 54, generating a locking force, locking the push head 51 in a predetermined position, thereby achieving the purpose of limiting the object to be limited.

[0099] Fig.13 It is a front cross-sectional view of another limiting device in an embodiment of the present disclosure.

[0100] Fig. 9 The piston in the limit device shown is Figure 7 The piston in the limit device shown has a different structure and is connected to the axial sleeve in a different way.

[0101] In the embodiments of the present disclosure, Fig. 9 As shown, the driving mechanism 3 includes a cylinder assembly and an axial sleeve 32 ; the axial sleeve 32 includes a tubular portion 321 and a flange portion 322 arranged at one end of the tubular portion 321 ; and the cylinder assembly includes a piston 31 .

[0102] One end of the piston 31 is fixedly connected to the flange portion 322 by means of screws.

[0103] A second target surface is disposed at a position of the flange portion 322 facing the sensing surface of the position feedback device 1 . The second target surface is parallel to the sensing surface, so that the position feedback device 1 can sense the displacement of the axial sleeve 32 .

[0104] The embodiment of the present disclosure also provides a supporting device, which includes multiple limiting devices provided by the embodiment of the present disclosure; multiple limiting devices are distributed and installed on the tube wall of the supporting device around the central axis of the supporting tube; multiple limiting devices are used to limit and lock the limited object supported by the supporting tube.

[0105] The embodiment of the present disclosure also provides a device, including the actuating device provided by the embodiment of the present disclosure.

[0106] Example embodiments have been disclosed herein, and although specific terms are employed, they are used and should be interpreted only in a general illustrative sense and not for limiting purposes. In some instances, it will be apparent to those skilled in the art that, unless otherwise expressly noted, features, characteristics, and / or elements described in conjunction with a particular embodiment may be used alone or in combination with features, characteristics, and / or elements described in conjunction with other embodiments. Therefore, those skilled in the art will appreciate that various changes in form and detail may be made without departing from the scope of the present disclosure as set forth in the appended claims.

Claims

1. A position feedback device, characterized in that: include: Proximity switch, used to detect the displacement of the object being measured; A protection component, wherein the proximity switch is arranged inside the protection component, and the protection component is used to protect the proximity switch.

2. The position feedback device according to claim 1, characterized in that: The proximity switch includes a switch body, a switch cable, and a switch connector; the protection component includes a protection shell and a protection tube; The switch body is arranged inside the protective shell, and the switch cable is arranged inside the protective tube; One end of the protection tube is connected to the protection shell, and the other end is connected to the switch connector.

3. The position feedback device according to claim 2, characterized in that: The protection assembly further includes a first connecting member and a second connecting member; the protection tube is connected to the protection shell via the first connecting member; and the protection tube is connected to the switch connector via the second connecting member.

4. The position feedback device according to claim 2, characterized in that: The interior of the protective shell is filled with sealant.

5. The position feedback device according to claim 4, characterized in that: The protective shell is provided with a glue injection hole for injecting sealant into the interior of the protective shell.

6. The position feedback device according to claim 2, characterized in that: The switch connector includes a waterproof connector.

7. The position feedback device according to any one of claims 2 to 6, characterized in that: The position feedback device further comprises a bracket assembly, and the bracket assembly is used for supporting the position feedback device.

8. The position feedback device according to claim 7, characterized in that: The switch body and the protective shell are arranged at the first end of the position feedback device; the bracket assembly includes a support member and at least one limiting member; a mounting hole is provided on the support member, and the first end of the position feedback device passes through the mounting hole; the limiting member is fixedly connected to the first end, and the first end is fixedly connected to the support member.

9. The position feedback device according to claim 8, characterized in that: The connection position between the limiting member and the first end is adjustable to adjust the connection position between the supporting member and the first end.

10. The position feedback device according to claim 9, characterized in that: A threaded portion is provided on the outer wall of the protective shell, and the limiting member is threadably connected to the first end via the threaded portion and can move axially on the threaded portion.

11. The position feedback device according to claim 7, characterized in that: The switch body, the protective shell and the bracket assembly are made of the same material.

12. An actuating device, characterized in that: include: Cylinder body; A movable assembly, disposed inside the cylinder body and capable of axial movement; A position feedback device is arranged on the cylinder body and is used to detect the displacement of the movable component, wherein the position feedback device is a position feedback device according to any one of claims 1 to 11.

13. The actuating device according to claim 12, characterized in that: The cylinder body is provided with a through hole; the position feedback device is at least partially installed in the through hole.

14. The actuating device according to claim 13, characterized in that: The cylinder body includes a tubular portion and a flange portion, and the through hole is obliquely provided at a position where the tubular portion and the flange portion intersect.

15. The actuating device according to claim 14, characterized in that The bracket assembly of the position feedback device includes a support member and at least one stopper; the support member is provided with a mounting hole, and the first end of the position feedback device passes through the mounting hole; the stopper is fixedly connected to the first end, and the first end is fixedly connected to the support member; The first end of the position feedback device is at least partially installed in the through hole, and the support member is fixedly connected to the cylinder body.

16. The actuating device according to claim 15, characterized in that The position feedback device is connected to the cathodic protection system of the actuating device.

17. The actuating device according to any one of claims 12 to 16, characterized in that The actuating device comprises: a driving mechanism, a transmission assembly, and a locking mechanism; the transmission assembly can be driven by the driving mechanism to move axially, and can also be driven axially by manual operation; the transmission assembly drives the locking mechanism to move axially.

18. The actuating device according to claim 17, characterized in that The movable component is the locking mechanism.

19. The actuating device according to claim 17, characterized in that The driving mechanism comprises a cylinder assembly and an axial sleeve; the axial sleeve comprises a tubular portion and a flange portion arranged at one end of the tubular portion of the axial sleeve; the cylinder assembly comprises a piston; A support groove is provided at one end of the piston, a boss matching the support groove is provided on the flange portion of the axial sleeve, and a support member is fixedly connected to the end of the piston provided with the support groove, so as to limit the boss in the support groove; A first target surface is arranged on the support member at a position facing the sensing surface of the proximity switch in the position feedback device, and the first target surface is parallel to the sensing surface.

20. The actuating device according to claim 17, characterized in that The driving mechanism comprises a cylinder assembly and an axial sleeve; the axial sleeve comprises a tubular portion and a flange portion arranged at one end of the tubular portion of the axial sleeve; the cylinder assembly comprises a piston; One end of the piston is fixedly connected to the flange portion of the axial sleeve by means of screws; A second target surface is arranged at a position of the flange portion of the axial sleeve facing the sensing surface of the proximity switch in the position feedback device, and the second target surface is parallel to the sensing surface.

21. A device, characterized in that The device comprises an actuating device according to any one of claims 12 to 20.

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