Detachable parallel dual-redundancy linear displacement sensor
By designing a detachable parallel dual-redundant linear displacement sensor, the motion component and outer ring component are connected by screws, and the coil component is detachable, which solves the problem of sensor being unrepairable and enables convenient disassembly, assembly, and maintenance.
Patent Information
- Application Number
- CN202422935336.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-11-29
AI Technical Summary
Existing linear displacement sensors use a welding method to encapsulate the housing and end caps, making them impossible to disassemble and repair when they fail.
Design a detachable parallel dual-redundant linear displacement sensor. The motion component and the outer ring component are connected by screws. The coil component is detachable. The rod structure of the motion component is placed in the inner hole of the coil component. The iron core and the connecting rod are connected by threads. Support rings and support blocks are installed at both ends of the iron core. The connecting studs are installed in the interface component, which makes disassembly and assembly simple.
It enables detachable maintenance of the linear displacement sensor, which is simple to assemble and disassemble, requires no special tools, and is easy to maintain.
Smart Images
Figure CN223485095U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of sensors and relates to a linear displacement sensor, specifically a detachable parallel dual-redundant linear displacement sensor. Background Technology
[0002] LVDT (Linear Variable Differential Transformer) is a type of linear displacement sensor widely used in aerospace and industrial fields. It boasts high reliability and ease of use and maintenance. Traditional linear displacement sensors typically use soldering for the housing and end caps, making them unrepairable in case of sensor failure. Utility Model Content
[0003] To address the aforementioned problems, this invention provides a detachable linear displacement sensor, which solves the problem that existing linear displacement sensors cannot be disassembled, thus making them unrepairable.
[0004] To achieve the above objectives, the technical solution of this utility model is as follows:
[0005] A detachable parallel dual-redundant linear displacement sensor includes a motion component, an outer ring component, and a coil component. The motion component is a parallel double-rod structure. The outer ring component contains two sets of coil components that cooperate with the motion component. The rod structure of the motion component is placed in the inner hole of the coil component.
[0006] Furthermore, the outer ring assembly includes a housing, a front end cover, and a rear end cover. The front end cover and the rear end cover are connected to the housing by cylindrical head screws with locking holes in the head. The rear end cover is a closed end cover, and the front end cover is an open end cover with a double-rod structure equipped with a cooperating motion component.
[0007] Furthermore, the coil assembly includes a primary coil, a secondary coil, a coil frame, and a magnetic sheet. The magnetic sheet is bonded to the inner end face of the coil frame. The primary coil is a copper wire primary winding with enamel coating wound around the coil frame. The secondary coil is a copper wire with enamel coating wound around the primary coil. The secondary coil is connected to a section of the lead wire by welding. The lead wire is thrown out through a notch in the housing.
[0008] Furthermore, the lead wire is covered with heat shrink tubing.
[0009] Furthermore, the front and rear ends of the coil frame are respectively installed in the inner holes of the front and rear end caps of the frame, the baffle is embedded in the inner hole of the rear end cap and closed outside the coil frame, and the two ends of the magnetic cover are tightly clamped to the outer annular surfaces of the front and rear end caps of the frame.
[0010] Furthermore, the front end of the coil frame passes through the front end cap.
[0011] Furthermore, the motion component includes an interface component and two sets of iron core connecting rod assemblies, wherein the steel wire thread sleeve is installed in the interface to form the interface component; the iron core and the connecting rod are axially connected by threads, and support rings and support blocks are installed at both ends of the iron core; the connecting rod is installed in the interface component by connecting studs, and the iron core, connecting rod, support ring, support block and connecting studs form a set of iron core connecting rod assemblies; the two sets of iron core connecting rod assemblies are installed in parallel on the interface component.
[0012] This utility model has the following beneficial effects:
[0013] This invention enables existing linear displacement sensors to be disassembled and repaired. Disassembly and assembly are simple, require no special tools, and are easy to maintain. Attached Figure Description
[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model patent, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model patent, and therefore 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.
[0015] Figure 1 This is a schematic diagram of the overall structure of the detachable parallel dual-redundancy linear displacement sensor of this utility model.
[0016] Figure 2 This is a schematic diagram of the outer ring assembly structure of the detachable parallel dual-redundancy linear displacement sensor of this utility model.
[0017] Figure 3 This is a schematic diagram of the structure of the detachable parallel dual-redundant linear displacement sensor coil assembly of this utility model.
[0018] Figure 4 This is a schematic diagram of the motion assembly structure of the detachable parallel dual-redundant linear displacement sensor of this utility model.
[0019] Figure 5 This is a schematic diagram of the detachable parallel dual-redundant linear displacement sensor interface assembly of this utility model.
[0020] Figure 6 This is a schematic diagram of the detachable parallel dual-redundant linear displacement sensor core connecting rod assembly of this utility model.
[0021] Among them, 1—motion component, 2—outer ring component, 3—coil component, 4—hexagonal nut, 5—cylindrical head screw with safety hole in the head;
[0022] 11—Interface assembly; 12—Core connecting rod assembly;
[0023] 111—Interface, 112—Wire thread insert, 121—Iron core, 122—Connecting rod, 123—Support ring, 124—Support block, 125—Connecting stud;
[0024] 21—Shell, 22—Front end cover, 23—Rear end cover;
[0025] 31—Primary coil, 32—Secondary coil, 33—Front end cap of the frame, 34—Coil frame, 35—Rear end cap of the frame, 36—Magnetic cover, 37—Magnetic sheet, 38—Insulating sheet, 39—Baffle, 310—Lead wire. Detailed Implementation
[0026] This section describes embodiments of the present invention, used to explain and illustrate the technical solutions of the present invention. Unless otherwise specified, the embodiments and features described herein can be combined with each other.
[0027] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating directions or positional relationships, are based on the orientation or positional relationships in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or device referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include more than one of those features. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integrated connection; they can refer to a mechanical connection or a point connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0029] Example 1:
[0030] A detachable parallel dual-redundant linear displacement sensor includes a motion component 1, an outer ring component 2, and a coil component 3. The motion component 1 is a parallel double-rod structure. The outer ring component 2 has two sets of coil components 3 that cooperate with the motion component 1. The rod structure of the motion component 1 is placed in the inner hole of the coil component 3.
[0031] The outer ring assembly 2 includes a housing 21, a front end cover 22 and a rear end cover 23. The front end cover 22 and the rear end cover 23 are respectively connected to the housing 21 by cylindrical head screws 5 with safety holes in the head. The rear end cover 23 is a closed end cover, and the front end cover 22 is an open end cover with a double rod structure that is equipped with a cooperating motion assembly 1.
[0032] The coil assembly 3 includes a primary coil 31, a secondary coil 32, a coil frame 34, and a magnetic sheet 37. The magnetic sheet 37 is bonded to the inner end face of the coil frame 34. The primary coil 31 is a primary winding of copper wire with enamel coating wound around the coil frame 34. The secondary coil 32 is a copper wire with enamel coating wound around the primary coil 31. The secondary coil 32 is soldered to a section of the lead wire 310, which extends out through a notch in the housing 21. The lead wire 310 is covered with heat shrink tubing.
[0033] The front and rear ends of the coil frame 34 are respectively installed in the inner holes of the front cover 33 and the rear cover 35. The baffle 39 is embedded in the inner hole of the rear cover 35 and closed outside the coil frame 34. The two ends of the magnetic cover 36 are tightly clamped to the outer annular surfaces of the front cover 33 and the rear cover 35. The front end of the coil frame 34 passes through the front cover 22.
[0034] The motion assembly 1 includes an interface assembly 11 and two sets of iron core connecting rod assemblies 12. The wire thread sleeve 112 is installed in the interface 111 to form the interface assembly 11. The iron core 121 and the connecting rod 122 are axially connected by threads. The iron core 121 is equipped with support rings 123 and support blocks 13 at both ends. The connecting rod 122 is installed in the interface assembly 11 by connecting studs 125. The iron core 121, connecting rod 122, support rings 123, support blocks 13 and connecting studs 125 form a set of iron core connecting rod assemblies 12. The two sets of iron core connecting rod assemblies 12 are installed in parallel on the interface assembly 11.
[0035] Example 2:
[0036] The sensor consists of a motion component 1, an outer ring component 2, a coil component 3, a hexagonal nut 4, and a cylindrical head screw 5 with a safety hole in the head. The outer ring component 2 mainly consists of a housing 21, a front cover 22, and a rear cover 23. The front cover 22 and the rear cover 23 are connected to the housing 21 by the cylindrical head screw 5 with a safety hole in the head, which facilitates disassembly. The coil component 3 is installed in the outer ring component 2. The motion component 1 is placed in the inner hole of the coil component 3. The external measured structure can be connected to the motion component 1 through the boss and through hole of the interface component 11. The primary coil 31 is powered by an alternating current with a frequency of 1800Hz and a voltage of 7V. The two coil components 3 form two independent closed magnetic fields. The motion component 1 moves axially along the inner hole of the coil component 3. The secondary coil 32 senses the position signal voltage according to the position of the motion component 1.
[0037] The magnetic sheet 37 is bonded to the inner end face of the frame 34, and the insulating sheet 38 is bonded to the surface of the magnetic sheet 37. The surface of the frame 34 is insulated with polytetrafluoroethylene film. The primary winding is a copper wire with enamel coating, which is wound around the coil frame 34. The secondary coil 32 is a copper wire with enamel coating, which is wound around the outside of the primary coil 31. The primary coil 31 and the secondary coil 32 are insulated with polytetrafluoroethylene film between the layers. The coil is welded to a section of the lead wire 310 by induction brazing. The lead wire 310 is covered with heat shrink tubing and is thrown out through the notch in the housing 21.
[0038] The coil skeleton 34 in the coil assembly 3 is installed in the front cover 33 of the skeleton, and in the inner hole of the front cover 33 and the rear cover 35 of the skeleton. The baffle 39 is embedded in the magnetic cover 36 and tightly clamped to the outer surface of the front cover 33 and the rear cover 35 of the skeleton. The magnetic cover 36 is made of tubing with a notch to facilitate wire exit. The front cover 33 and the rear cover 35 of the skeleton are installed in the housing 21, the front cover 22 and the rear cover 23. The coil skeleton 34 passes through the front cover 22. The through-type coil skeleton 34 can ensure coaxiality. The housing 21 is a cuboid design with wire exit hole and potting hole, and the interior is left with wire routing space.
[0039] The motion assembly 1 consists of an interface assembly 11 and an iron core connecting rod assembly 12. A standard steel wire thread insert 112 is installed in the interface 111 to form the interface assembly 11. The iron core 121 and connecting rod 122 are connected by threads and coated with thread-locking adhesive. Support rings 123 and support blocks 13 are installed at both ends of the iron core 121 to prevent wear during sensor operation. The connecting rod is installed in the interface assembly 11 via a connecting stud 125. The iron core connecting rod assembly 12 can rotate within the interface assembly 11 during debugging to meet debugging requirements. The iron core 121, connecting rod 122, support rings 123, support blocks 13, and connecting stud 125 constitute the iron core connecting rod assembly. A hexagonal nut 4 is installed on the connecting stud 125 and secured to prevent rotation of the iron core connecting rod assembly during use.
[0040] Figure 2 and Figure 3 This is a schematic diagram of the outer ring assembly and coil assembly of the detachable parallel dual-redundancy linear displacement sensor of this utility model.
[0041] The magnetic sheet 37 is bonded to the inner end face of the coil frame 34, and the insulating sheet 38 is bonded to the surface of the magnetic sheet 37. The surface of the coil frame 34 is insulated with a polytetrafluoroethylene film. The primary winding is a copper wire with enamel coating wound around the coil frame 34. The secondary coil 32 is a copper wire with enamel coating wound around the outside of the primary coil 31. The primary coil 31 and the secondary coil 32 are insulated with a polytetrafluoroethylene film between their layers. The coil is welded to a section of the lead wire 310 by induction brazing. The lead wire 310 is covered with a heat shrink tubing 311 and extends out through the notch in the housing 21. In component 3, the coil bobbin 34 is installed in the inner holes of the front cover 33 and the rear cover 35 of the bobbin. The baffle 39 is embedded in the rear cover 35 of the bobbin. The magnetic cover 36 is tightly clamped to the outer surface of the front cover 33 and the rear cover 35 of the bobbin. The magnetic cover 36 is made of tubing with notches to facilitate wire exit. The front cover 33 and the rear cover 35 of the bobbin are installed in the housing 21, the front cover 22 and the rear cover 23. The coil bobbin 34 passes through the front cover 22. The through-type coil bobbin 34 can ensure coaxiality. The housing 21 is a cuboid design with wire exit holes and potting holes, and the interior has space for wire routing.
[0042] Figure 4 This is a schematic diagram of the motion assembly structure of the detachable parallel dual-redundant linear displacement sensor of this utility model.
[0043] The motion assembly 1 consists of an interface assembly 11 and an iron core connecting rod assembly 12. A standard steel wire thread insert 112 is installed in the interface 111 to form the interface assembly 11. The iron core 121 and connecting rod 122 are connected by threads and coated with thread-locking adhesive. Support rings 123 and support blocks 13 are installed at both ends of the iron core 121 to prevent wear during sensor operation. The connecting rod is installed in the interface assembly 11 via a connecting stud 125. The iron core connecting rod assembly 12 can rotate within the interface assembly 11 during debugging to meet debugging requirements. The iron core 121, connecting rod 122, support rings 123, support blocks 13, and connecting stud 125 constitute the iron core connecting rod assembly. A hexagonal nut 4 is installed on the connecting stud 125 and secured to prevent rotation of the iron core connecting rod assembly during use.
[0044] Figure 5 This is a schematic diagram of the detachable parallel dual-redundant linear displacement sensor interface assembly of this utility model.
[0045] A standard type wire thread insert 112 with a break groove is installed in the interface 111 for installing the iron core connecting rod assembly 12.
[0046] Figure 6 This is a schematic diagram of the detachable parallel dual-redundant linear displacement sensor core connecting rod assembly of this utility model.
[0047] The iron core 121 and the connecting rod 122 are connected by threads, the support block 124 and the iron core 121 are connected by threads, the support ring 123 is fitted at the connection between the iron core 121 and the connecting rod 122, and the connecting stud 125 is installed at the other end of the connecting rod 122 by threads.
[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should be covered within the protection scope of this utility model.
Claims
1. A detachable parallel dual-redundant linear displacement sensor, characterized in that, It includes a motion component (1), an outer ring component (2), and a coil component (3). The motion component (1) is a parallel double rod structure. The outer ring component (2) is provided with two sets of coil components (3) that cooperate with the motion component (1). The rod structure of the motion component (1) is placed in the inner hole of the coil component (3).
2. A detachable parallel dual-redundant linear displacement sensor according to claim 1, characterized in that, The outer ring assembly (2) includes a housing (21), a front end cover (22) and a rear end cover (23). The front end cover (22) and the rear end cover (23) are connected to the housing (21) by cylindrical head screws (5) with safety holes in the head. The rear end cover (23) is a closed end cover, and the front end cover (22) is an open end cover with a double rod structure equipped with a cooperating motion assembly (1).
3. A detachable parallel dual-redundant linear displacement sensor according to claim 2, characterized in that, The coil assembly (3) includes a primary coil (31), a secondary coil (32), a coil frame (34), and a magnetic sheet (37). The magnetic sheet (37) is bonded to the inner end face of the coil frame (34). The primary coil (31) is a copper wire primary winding with enamel coating wound on the coil frame (34). The secondary coil (32) is a copper wire with enamel coating wound around the primary coil (31). The secondary coil (32) is welded to a section of the lead wire (310). The lead wire (310) is thrown out through the notch in the housing (21).
4. A detachable parallel dual-redundant linear displacement sensor according to claim 3, characterized in that, The lead wire (310) is covered with heat shrink tubing.
5. A detachable parallel dual-redundant linear displacement sensor according to claim 3, characterized in that, The front and rear ends of the coil frame (34) are respectively installed in the inner holes of the front cover (33) and the rear cover (35) of the frame. The baffle (39) is embedded in the inner hole of the rear cover (35) of the frame and closed outside the coil frame (34). The two ends of the magnetic cover (36) are tightly clamped to the outer ring surface of the front cover (33) and the rear cover (35) of the frame.
6. A detachable parallel dual-redundant linear displacement sensor according to claim 5, characterized in that, The front end of the coil bobbin (34) passes through the front end cover (22).
7. A detachable parallel dual-redundant linear displacement sensor according to claim 1, characterized in that, The motion component (1) includes an interface component (11) and two sets of iron core connecting rod assemblies (12). The wire thread sleeve (112) is installed in the interface (111) to form the interface component (11). The iron core (121) and the connecting rod (122) are axially connected by threads. The iron core (121) is equipped with a support ring (123) and a support block (124) at both ends. The connecting rod (122) is installed in the interface component (11) by a connecting stud (125). The iron core (121), the connecting rod (122), the support ring (123), the support block (124) and the connecting stud (125) form a set of iron core connecting rod assemblies (12). The two sets of iron core connecting rod assemblies (12) are installed in parallel on the interface component (11).