Movable subassembly of linear displacement sensor and linear displacement sensor

Abstract

The present invention discloses a moving subassembly of a linear displacement sensor and a linear displacement sensor, which have good applicability and are easy to install. The moving subassembly includes: a magnetic core seat body, a moving rod, a magnetic core piece, two angular bearings and an inner end cover of the bearing, wherein a first installation operation part is provided on the moving rod, a second installation operation part is provided at one end of the moving rod, and a connecting part is provided at the other end; the inner end cover of the bearing is threadedly connected to one end of the moving rod provided with the second installation operation part, and the two angular bearings are installed back to back on the moving rod and are located between the inner end cover of the bearing and the first installation operation part, and the connecting part on the moving rod is fixedly connected to the position to be installed by operating the first installation operation part or the second installation operation part; one end of the magnetic core seat body is relatively fixed to the outer ring of the angular bearing, the other end of the magnetic core seat body is provided with a magnetic core piece, and one end of the magnetic core seat body provided with the magnetic core piece is provided with a avoidance part connected to the second installation operation part.

Description

Technical Field

[0001] The present invention relates to the technical field of sensors, and in particular to a moving subassembly of a linear displacement sensor and the linear displacement sensor. Background Art

[0002] Dual-redundancy linear displacement sensors are widely used in aircraft fly-by-wire flight control systems and engine systems. The purpose of the dual-redundancy design is that if one set of winding coils fails, the other set of spare windings will start working to ensure the normal performance output of the sensor. Figure 1 As shown, the double-redundant linear displacement sensor mainly includes a moving subassembly and a stator subassembly. The moving subassembly is an important structure for realizing the function of the sensor. The moving subassembly mainly includes a magnetic core seat body 01, a moving rod 02, an angular contact bearing 03, a bearing outer end cover 04, a bearing inner end cover 05, a screw 06, a magnetic core assembly 07, an anti-backlash washer 08, etc. Figure 2 As shown, a moving rod 02 is installed at one end of the magnetic core base 01, and a magnetic core assembly 07 is installed at the other end. A connecting thread 021 is provided at the end of the moving rod 02 away from the magnetic core base 01. Figure 3 As shown, the bearing outer end cover 04 is fixedly connected to the moving rod 02 by screws 06 to fix the outer ring of the angular contact bearing 03 to the moving rod 02.

[0003] At present, the installation of the movable subassembly is mainly performed by fixing the connecting thread 021 on the movable rod 02 with the position to be installed. During installation, the connecting thread 021 on the movable rod 02 is mainly rotated by rotating the outer hexagonal piece 022 provided on the movable rod 02 to rotate the connecting thread 021 on the movable rod 02 into the threaded hole matched therewith. The outer hexagonal piece 022 is located on the side of the magnetic core base body 01 away from the magnetic core assembly 07 installed thereon, that is, during operation, it can only be operated on the side of the magnetic core base body 01 away from the magnetic core assembly 07 installed thereon. The operation method is relatively simple. When the position to be installed is a deep cavity hole or a blind hole, it cannot be installed or the installation is relatively difficult, and the installation application scope is relatively narrow. Summary of the invention

[0004] As mentioned above, usually when fixing the mover assembly and the installation position, the installation can only be achieved by operating the hexagonal outside on the side of the core seat body away from the core assembly installed thereon. The operation method is relatively simple. When the installation position is a deep cavity hole or a blind hole, it cannot be installed or the installation is difficult, and the installation application scope is narrow.

[0005] In view of the problems in the prior art, the present invention proposes a moving subassembly of a linear displacement sensor, comprising: a magnetic core seat, a moving rod, a magnetic core piece, two angular bearings and an inner end cover of a bearing, wherein:

[0006] The moving rod is provided with a first installation operation portion, one end of the moving rod is provided with a second installation operation portion, and the other end is provided with a connecting portion;

[0007] The inner end cover of the bearing is threadedly connected to one end of the moving rod provided with a second installation operation part, and the two angle bearings are installed back to back on the moving rod and are located between the inner end cover of the bearing and the first installation operation part, and the connecting part on the moving rod is fixedly connected to the position to be installed by operating the first installation operation part or the second installation operation part;

[0008] One end of the core seat body is relatively fixed to the outer ring of the angular bearing, the other end of the core seat body is provided with the core piece, and one end of the core seat body provided with the core piece is provided with a avoidance portion connected to the second installation operation portion.

[0009] In some optional embodiments, the above-mentioned movable subassembly of the linear displacement sensor further includes: a bearing outer end cover;

[0010] The magnetic core seat body is provided with a mounting groove, the groove bottom of the mounting groove is provided with the avoidance portion, the moving rod is provided with the bearing inner end cover and the angular bearing portion located in the mounting groove, and the magnetic core piece is provided on the side of the groove bottom away from the first mounting operation portion;

[0011] The outer end cover of the bearing is fixedly connected to the core seat body, and is used to limit the inner end cover of the bearing and the angular bearing in the installation groove, so that one end of the core seat body is relatively fixed to the outer ring of the angular bearing.

[0012] In some optional embodiments, the magnetic core seat body includes: a first connecting seat and a second connecting seat connected to one end of the first connecting seat, the second connecting seat is provided with an external thread and a through groove, the first connecting seat is provided with a groove connected to the through groove, the groove and the through groove form the mounting groove, and the bearing outer end cover is fixedly connected to the magnetic core seat body via the external thread provided on the second connecting seat.

[0013] In some optional implementations, the magnetic core seat body is provided with a threaded hole, the magnetic core piece is provided with threads, and the magnetic core piece is threadedly connected to the threaded hole.

[0014] In some optional embodiments, the first installation operation part includes: a first sub-operation part, the first sub-operation part is arranged between the angular bearing and the connecting part; and / or,

[0015] The second sub-operating portion is arranged at one end of the moving rod where the connecting portion is arranged.

[0016] In some optional embodiments, a first shoulder is provided on the moving rod, and the first shoulder is located on a side of the angular bearing away from the inner end cover of the bearing.

[0017] In some optional embodiments, a plurality of second shoulders are provided on the moving rod, and along the length direction of the moving rod, the plurality of second shoulders are spaced apart and distributed between the angular bearing and the connecting portion, and a sealing ring groove is provided between the second shoulder and the moving rod.

[0018] In some optional embodiments, the connecting portion is a thread; and / or,

[0019] The first sub-operation part is an outer hexagonal structure; and / or,

[0020] The second installation operation portion is an operation hole; and / or,

[0021] The second sub-operation portion is an operation hole.

[0022] In some optional embodiments, the second installation operation portion is an inner hexagonal hole; and / or,

[0023] The second sub-operation portion is an inner hexagonal hole.

[0024] The present invention also provides a linear displacement sensor, comprising a stator assembly and any one of the above-mentioned mover assemblies.

[0025] Compared with the prior art, the present invention has achieved the following technical effects:

[0026] 1. The first installation operation part and the second installation operation part are provided to improve the applicable scope of the installation operation. For different installation positions, a suitable installation operation mode can be selected, which has good applicability and installation convenience;

[0027] 2. The back-to-back angular bearing installation design provides a relatively high rigidity bearing configuration, and enables the angular bearing to withstand the overturning moment, thereby increasing the service life of the mover assembly;

[0028] 3. The inner ring of the angular bearing is connected to the moving rod, and the outer ring is relatively fixed to the magnetic core. The previous design of the inner ring of the angular bearing is fixed and the outer ring is movable, and the outer ring is fixed and the inner ring is rotating, so that the overall stability of the sensor is better;

[0029] 4. By threading the outer end cover of the bearing with the core seat body, the diameter of the mounting groove provided in the core seat body can be increased. Under the premise of the same external dimensions, the bearing size in the mover assembly can be increased relative to the prior art, thereby improving the mechanical properties and increasing the reliability of the mover assembly.

[0030] 5. The installation practicability of the moving subassembly is further improved by providing the second installation operation part, the first sub-operation part and the second sub-operation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings listed in the present invention are only used to better understand the technical solutions and advantages of the present invention, but do not constitute any limitation on the technical solutions of the present invention.

[0032] Figure 1 It is an exploded view of a mover assembly in the prior art;

[0033] Figure 2 It is a schematic diagram of the three-dimensional structure of a mover assembly in the prior art;

[0034] Figure 3 It is a partial cross-sectional view of a mover assembly in the prior art;

[0035] Figure 4 This is the equivalent circuit of the linear displacement sensor provided by the present invention;

[0036] Figure 5 is an output characteristic diagram provided by the present invention;

[0037] Figure 6 is a cross-sectional view of a mover assembly provided by the present invention;

[0038] Figure 7 is a partial cross-sectional view of a mover assembly provided by the present invention;

[0039] Figure 8 This is an exploded view of the inner ring fixing structure of the angular bearing provided by the present invention;

[0040] Fig. 9 This is a fixed assembly diagram of the inner ring of the angular bearing provided by the present invention;

[0041] Fig.10 This is an exploded view of the outer ring of the angular bearing provided by the present invention;

[0042] Fig.11 This is a fixed assembly diagram of the outer ring of the angular bearing provided by the present invention;

[0043] Fig.12 This is an exploded view of the assembly of the magnetic core member provided by the present invention;

[0044] Fig.13 is a schematic diagram of a magnetic core member provided by the present invention;

[0045] Fig.14 A schematic diagram of the structure of the linear displacement sensor provided by the present invention;

[0046] Fig.15 This is an exploded view of the stator assembly provided by the present invention.

[0047] in:

[0048] 01-magnetic core seat 02-moving rod 021-connecting thread 022-external hexagon 03-angular contact bearing 04-bearing outer end cover 05-bearing inner end cover 06-screw 07-magnetic core assembly 08-anti-backlash washer

[0049] 1-magnetic core seat body 11-avoidance part 12-installation groove 13-first connection seat 131-groove 14-second connection seat 141-external thread 142-through groove 15-threaded hole 16-first shaft shoulder 17-second shaft shoulder 18-sealing ring groove 2-moving rod 21-first installation operation part 211-first sub-operation part 212-second sub-operation part 22-second installation operation part 23-connecting part 3-magnetic core piece 31-moving rod 32-magnetic core 33-plug 4-angular bearing 5-bearing inner end cover 6-bearing outer end cover 100-moving subassembly 200-stator assembly 201-housing 202-coil assembly 203-stopping pressure piece 204-grounding gasket 205-stopping pressure ring 206-rear end cover 207-lead wire 208-heat shrink tube DETAILED DESCRIPTION

[0050] The present invention is further described in detail and completely below in conjunction with specific embodiments. The following description is merely illustrative in nature and is not intended to limit the present disclosure, application or use.

[0051] Taking the linear differential transformer displacement sensor as an example, the principle of the linear sensor is briefly explained. The linear differential transformer displacement sensor is an inductive sensor that converts the mechanical displacement change of non-electrical quantity into the proportional change of electrical parameter. When the parasitic capacitance of the coil and the core loss are ignored, the equivalent circuit of the linear displacement sensor is Figure 4 shown.

[0052] in Figure 4 In the figure: e1 is the primary coil excitation voltage; L1 and R1 are the primary coil inductance and resistance respectively; L 21 , L 22 are the inductances of the two secondary coils respectively; M1 and M2 are the mutual inductances of the primary and two secondary coils respectively; R 21 , R 22 are the resistances of the two secondary coils respectively.

[0053] Within the measurement range and under the load open circuit condition, according to the linear displacement sensor output potential calculation formula, the characteristic of the relationship between the output potential and the core displacement can be expressed as follows: Figure 5 shown.

[0054] in Figure 5 Chinese: e 21 、e 22 is the output potential of the two secondary coils; e2 is the differential output potential; x is the distance that the magnetic core deviates from the center position.

[0055] like Figure 6 and Figure 7 As shown, the present invention proposes a moving subassembly of a linear displacement sensor, comprising: a magnetic core seat body 1, a moving rod 2, a magnetic core member 3, two angular bearings 4 and a bearing inner end cover 5, wherein:

[0056] The moving rod 2 is provided with a first installation operation portion 21, one end of the moving rod 2 is provided with a second installation operation portion 22, and the other end is provided with a connecting portion 23;

[0057] The inner end cover 5 of the bearing is threadedly connected to one end of the second installation operation part 22 of the moving rod 2. The two angular bearings 4 are installed back to back on the moving rod 2 and are located between the inner end cover 5 of the bearing and the first installation operation part 21. The connection part on the moving rod 2 is fixedly connected to the position to be installed by operating the first installation operation part 21 or the second installation operation part 22.

[0058] One end of the core base body 1 is relatively fixed to the outer ring of the angular bearing 4 , and the other end of the core base body 1 is provided with a core piece 3 . The end of the core base body 1 provided with the core piece 3 is provided with an escape portion 11 connected to the second installation operation portion 22 .

[0059] The movable subassembly provided by the present invention improves the application scope and convenience of the installation operation by providing the first installation operation part 21 and the second installation operation part 22. For different installation positions, a suitable installation operation mode can be selected; the back-to-back angular bearing 4 installation design provides a relatively high rigidity bearing configuration, and enables the angular bearing 4 to withstand the overturning moment, thereby improving the service life of the movable subassembly; the inner ring of the angular bearing 4 is connected to the moving rod 2, and the outer ring is relatively fixed to the magnetic core 3, and the previous design of the inner ring of the angular bearing 4 is changed to the outer ring is fixed and the inner ring rotates, so that the overall stability of the sensor is better. The design of the avoidance part 11 improves the convenience of the second installation operation part 22 when operating.

[0060] According to the use requirements, the sensor's movable subassembly can rotate with the valve core fixed to it. Since the sensor's movable subassembly is restricted by the stator assembly and can only move axially but not rotate, how to eliminate the rotation of the movable subassembly without affecting the axial movement of the movable subassembly is a difficult point in the product design.

[0061] A group of angular bearings installed back to back are fixed inside the movable subassembly provided by the present invention. The rotation of the angular bearings can realize the rotation of the moving rod 2 relative to the magnetic core seat body, thereby eliminating the rotation of the movable subassembly.

[0062] Angular bearings can bear radial loads and axial loads at the same time, and can also bear pure axial loads. The limit speed is relatively high. When single-row angular bearings bear radial loads, additional axial forces will be caused. Therefore, in general, angular bearings need to be used in pairs. Bearings installed in different configurations are divided into back-to-back configuration, face-to-face configuration, and tandem configuration according to the combination of different end faces of their outer rings. The following analyzes and compares the three combinations.

[0063] 1) Back-to-back configuration

[0064] The load lines of bearings installed in a back-to-back arrangement are separated along the axial direction of the bearing. They can bear axial loads acting in two directions, but the load in each direction can only be borne by one bearing. Bearings installed in a back-to-back arrangement provide a relatively high rigidity bearing configuration and can withstand overturning moments.

[0065] 2) Face-to-face configuration

[0066] The load lines of the bearings installed face to face converge along the axial direction of the bearing. They can withstand axial loads in two directions, but the load in each direction can only be borne by one bearing. Compared with the back-to-back combination installation, this combination installation method has lower rigidity and is not suitable for bearing overturning moments. The bearing group can withstand bidirectional axial loads.

[0067] 3) Series configuration

[0068] For bearings installed in series, the load line is parallel to the bearing axis. The radial and axial loads are evenly shared by the bearings. Three or more bearings can also be connected in series at the same support, but the bearing group can only withstand axial loads acting in one direction. If the axial load acts in the opposite direction, or there is a composite load, a third adjustment bearing must be added relative to the series combination bearings. In general, in order to balance and limit the axial displacement of the shaft, a bearing that can withstand the axial load in the other direction needs to be installed at the other support.

[0069] In summary, since the movable components of the linear displacement sensor are all cantilever beam mounting structures, the internal bearings are subject to a certain overturning moment. Therefore, the bearings of the movable components provided by the invention are configured back to back so that the angular bearing 4 can withstand the overturning moment, thereby increasing the service life of the movable components.

[0070] The specific structures of the first installation operation part 21 and the second installation operation part 22 can be various, and can be holes or protrusions, and are configured to be adapted to the structure of the operating tool that cooperates with them. The first installation operation part 21 and the moving rod 2 are an integral structure or a split structure, and the second installation operation part 22 and the moving rod 2 are an integral structure or a split structure. The avoidance part 11 is also correspondingly designed to be a structure that is convenient for the operation of the operating tool, such as a through hole, a through groove, etc. The connecting part 23 can be a connecting thread, a connecting buckle, etc., which will not be described one by one here.

[0071] like Figure 8 to Figure 10 As shown, the moving subassembly of the above-mentioned linear displacement sensor further includes: a bearing outer end cover 6;

[0072] The magnetic core seat body 1 is provided with a mounting groove 12, the bottom of the mounting groove 12 is provided with an avoidance portion 11, the moving rod 2 is provided with a bearing inner end cover 5 and a portion of the angular bearing 4 located in the mounting groove 12, and a magnetic core member 3 is provided on the side of the bottom of the mounting groove 12 away from the first mounting operation portion 21;

[0073] The outer end cover 6 of the bearing is fixedly connected to the core base body 1 and is used to limit the inner end cover 5 of the bearing and the angular bearing 4 in the mounting groove 12 so that one end of the core base body 1 is relatively fixed to the outer ring of the angular bearing 4 .

[0074] During assembly, install the two angle bearings back to back on the moving rod 2, and screw the inner end cover 5 of the bearing onto the thread of the moving rod 2 through its thread. The assembled structure is as follows: Fig. 9 As shown, the moving rod 2 assembled with the angular bearing 4 and the inner end cover 5 of the bearing is placed in the installation groove 12 of the core base body 1, and is fixedly connected to the core base body 1 through the outer end cover 6 of the bearing to fix the outer ring of the angular bearing 4. The structure after installation is as shown in FIG. Fig.11 The outer end cover 6 of the bearing is connected to the magnetic core seat body 1, so that the outer ring of the angular bearing 4 can be conveniently fixedly connected to the magnetic core member 3, and the connection structure is simple and easy to operate.

[0075] There are many ways to connect the magnetic core base 1 and the bearing outer end cover 6, which can be screw connection or snap connection. In a preferred embodiment provided by the present invention, Fig.10 and Fig.11 As shown, the core seat body 1 includes: a first connecting seat 13 and a second connecting seat 14 connected to one end of the first connecting seat 13, the second connecting seat 14 is provided with an external thread 141 and a through groove 142, the first connecting seat 13 is provided with a groove 131 connected to the through groove 142, the groove 131 and the through groove 142 form a mounting groove 12, and the bearing outer end cover 6 is fixedly connected to the core seat body 1 through the external thread 141 provided on the second connecting seat 14.

[0076] Compared with the connection by snap or screw, the outer end cover 6 of the bearing is threadedly connected to the core base body 1, which can save the space occupied by the screws or snaps and increase the diameter of the mounting groove 12 set in the core base body 1. On the premise of the same external dimensions, the size of the angular bearing 4 in the mover assembly can be increased, thereby improving the mechanical properties and increasing the reliability of the mover assembly.

[0077] There are also many ways to connect the magnetic core 3 and the magnetic core base 1, such as: one-piece connection, or snap connection, etc. In an optional embodiment provided by the present invention, Fig.12 As shown, the magnetic core base body 1 is provided with a threaded hole 15, the magnetic core piece 3 is provided with a thread, and the magnetic core piece 3 is threadedly connected to the threaded hole 15. The threaded connection facilitates the removal and installation of the magnetic core piece 3 and the magnetic core base body 1.

[0078] like Fig.13 As shown, the magnetic core member 3 provided by the present invention is composed of a connecting rod 31, a magnetic core 32, and a plug 33 of the magnetic core 32. The movable subassembly provided by the present invention includes two magnetic core members 3.

[0079] In an optional implementation manner provided by the present invention, the first installation operation portion 21 includes: a first sub-operation portion 211 , and the first sub-operation portion 211 is disposed between the angular bearing 4 and the connection portion 23 .

[0080] In another optional implementation manner provided by the present invention, the first installation operation portion 21 includes: a second sub-operation portion 212 , and the second sub-operation portion 212 is disposed at one end of the moving rod 2 where the connecting portion 23 is disposed.

[0081] In another optional embodiment provided by the present invention, the first installation operation part 21 includes: a first sub-operation part 211 and a second sub-operation part 212, the first sub-operation part 211 is arranged between the angular bearing 4 and the connecting part, and the second sub-operation part 212 is arranged at one end of the moving rod 24 where the connecting part 23 is provided.

[0082] like Figure 6 As shown, in some optional embodiments, the moving rod 2 is provided with a first shaft shoulder 16, and the first shaft shoulder 16 is located on the side of the angular bearing 4 away from the bearing inner end cover 5. The provision of the first shaft shoulder 16 facilitates the positioning of the angular bearing 4.

[0083] like Figure 8 As shown, the moving rod 2 is provided with a plurality of second shaft shoulders 17, which are spaced apart between the angular bearing 4 and the connecting portion along the length direction of the moving rod 2, and a sealing ring groove 18 is provided between the second shaft shoulder 17 and the moving rod. The provision of the sealing ring groove 18 facilitates the installation of the sealing ring and improves the sealing performance.

[0084] In an optional embodiment provided by the present invention, the connecting portion is a thread; and / or,

[0085] The first sub-operation portion 211 is an outer hexagonal structure; and / or,

[0086] The second installation operation portion 22 is an operation hole; and / or,

[0087] The second sub-operation portion 212 is an operation hole. The above structure can be one or a combination of multiple structures, which will not be described one by one here.

[0088] The above-mentioned operation hole can be a circular hole, a square hole, a pentagonal hole, etc., which will not be described one by one here. In an optional embodiment provided by the present invention, the second installation operation portion 22 is an inner hexagonal hole; and / or,

[0089] The second sub-operation portion 212 is an inner hexagonal hole. That is, in one embodiment, the second installation operation portion 22 is an inner hexagonal hole; the second sub-operation portion 212 is a hole of other shapes; in another embodiment, the second installation operation portion 22 is a hole of other shapes; the second sub-operation portion 212 is an inner hexagonal hole; in yet another embodiment, the second installation operation portion 22 and the second sub-operation portion 212 are both inner hexagonal holes.

[0090] The outer hexagonal structure on the moving rod 2 is suitable for large installation operation space, and a general open-end wrench is used to screw the movable subassembly into the installation position through threads; the second sub-operation part 212 on the moving rod 2 is suitable for small installation space, and a hexagonal wrench is used to screw the movable subassembly into the installation position through threads; the second installation operation part 22 on the moving rod 2 is suitable for general deep blind hole installation, and when the installation space is narrow, a hexagonal wrench can be used to screw the movable subassembly into the installation position through threads. It can be seen that the movable subassembly provided by the present invention can be applied to a variety of installation spaces.

[0091] like Fig.14 As shown, the present invention further provides a linear displacement sensor, comprising a stator assembly 200 and any one of the above-mentioned mover assemblies 100. The linear displacement sensor provided by the present invention has good applicability and good service life.

[0092] The embodiment of the present invention is described by taking a dual-redundant linear displacement sensor as an example, but the improvements of the present invention are not limited to this type of sensor. The structure of the dual-redundant linear displacement sensor consists of a stator assembly and a mover assembly. Each sensor has two coil assemblies and two magnetic core 32 assemblies, which share a set of outer casing and moving rod 2.

[0093] like Fig.15As shown, the sensor stator assembly consists of a housing 201, two coil assemblies 202, a stopper 203, a grounding gasket 204, a stopper ring 205, a rear end cover 206, two lead wires 207 and a heat shrink tube 208. To ensure the sealing performance and strength, the stator assembly is finally laser welded to form a sealed whole.

[0094] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may occur depending on design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A moving subassembly of a linear displacement sensor, characterized in that: include: The magnetic core seat body, the moving rod, the magnetic core piece, two angular bearings and the inner end cover of the bearing, wherein: The moving rod is provided with a first installation operation portion, one end of the moving rod is provided with a second installation operation portion, and the other end is provided with a connecting portion; The inner end cover of the bearing is threadedly connected to one end of the moving rod provided with a second installation operation part, and the two angle bearings are installed back to back on the moving rod and are located between the inner end cover of the bearing and the first installation operation part, and the connecting part on the moving rod is fixedly connected to the position to be installed by operating the first installation operation part or the second installation operation part; One end of the magnetic core seat body is relatively fixed to the outer ring of the angular bearing, the other end of the magnetic core seat body is provided with the magnetic core piece, and one end of the magnetic core seat body provided with the magnetic core piece is provided with a avoidance portion connected to the second installation operation portion, and the first installation operation portion includes: a first sub-operation portion, the first sub-operation portion is arranged between the angular bearing and the connecting portion; and / or, The second sub-operating part is arranged at one end of the moving rod where the connecting part is provided, and the connecting part is a thread; and / or, the first sub-operating part is an external hexagonal structure; and / or, the second installation operating part is an operating hole; and / or, the second sub-operating part is an operating hole; the second installation operating part is an internal hexagonal hole; and / or, the second sub-operating part is an internal hexagonal hole, the inner end cover of the bearing is screwed onto the thread of the moving rod through its thread, the inner ring of the angular bearing rotates, and the outer ring does not move.

2. The movable subassembly of the linear displacement sensor according to claim 1, characterized in that: Also includes: Bearing outer end cover; The magnetic core seat body is provided with a mounting groove, the groove bottom of the mounting groove is provided with the avoidance portion, the moving rod is provided with the bearing inner end cover and the angular bearing portion located in the mounting groove, and the magnetic core piece is provided on the side of the groove bottom away from the first mounting operation portion; The outer end cover of the bearing is fixedly connected to the core seat body, and is used to limit the inner end cover of the bearing and the angular bearing in the installation groove, so that one end of the core seat body is relatively fixed to the outer ring of the angular bearing.

3. The moving subassembly of the linear displacement sensor according to claim 2, characterized in that: The magnetic core seat body includes: a first connecting seat and a second connecting seat connected to one end of the first connecting seat, the second connecting seat is provided with an external thread and a through groove, the first connecting seat is provided with a groove connected to the through groove, the groove and the through groove form the mounting groove, and the bearing outer end cover is fixedly connected to the magnetic core seat body through the external thread provided on the second connecting seat.

4. The moving subassembly of the linear displacement sensor according to claim 2, characterized in that: The magnetic core seat body is provided with a threaded hole, the magnetic core piece is provided with threads, and the magnetic core piece is threadedly connected to the threaded hole.

5. The moving subassembly of the linear displacement sensor according to claim 1, characterized in that: The moving rod is provided with a first shaft shoulder, and the first shaft shoulder is located at a side of the angular bearing away from the inner end cover of the bearing.

6. The moving subassembly of the linear displacement sensor according to claim 1, characterized in that: The moving rod is provided with a plurality of second shaft shoulders, and along the length direction of the moving rod, the plurality of second shaft shoulders are distributed at intervals between the angular bearing and the connecting portion, and a sealing ring groove is provided between the second shaft shoulder and the moving rod.

7. A linear displacement sensor, characterized in that: It comprises a stator assembly and a mover assembly as claimed in any one of claims 1 to 6.

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