Auxiliary assembly device and assembly method for dual-redundancy linear displacement sensor

Abstract

The invention discloses an auxiliary assembly device and method for a dual-redundancy linear displacement sensor, and the dual-redundancy linear displacement sensor comprises a housing, a dual-redundancy coil assembly, a positioning plate, and a coil. The positioning plate presses the dual-redundancy coil assembly, and the dual-redundancy coil assembly is fastened through jacking of the screwed coil, and the auxiliary assembling device comprises a positioning assembly used for positioning a shell and guiding the dual-redundancy coil assembly to be installed in the shell; and the limiting assembly is used for pressing the dual-redundancy coil assembly in the shell so as to limit displacement of the dual-redundancy coil assembly in the screwing process of the coil. According to the auxiliary assembling device, the position relation between the two coil assemblies and the shell is restrained, the step of repeated disassembly, assembly and adjustment is not needed, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of linear displacement sensor technology, and in particular to an auxiliary assembly device and assembly method for a dual-redundant linear displacement sensor. Background Technology

[0002] Dual-redundant linear displacement sensors are core measurement components in high-reliability fields such as aerospace and automotive electronics (e.g., engine valve displacement detection, brake system stroke monitoring). Their core function is to achieve high-precision linear displacement measurement through two independent sensing channels. The dual-redundant design can ensure normal system operation in the event of a single-channel failure, meeting reliability requirements under extreme conditions.

[0003] Existing dual-redundant linear displacement sensors typically include a housing, a coil assembly (including a frame, magnetic shield, and sensing coil), a positioning plate, and a screw ring. To adapt to compact space layouts, improve electromagnetic shielding performance, and protect cables, the relevant technology adopts the following design: the cable of the coil assembly needs to be folded back, passed through the inside of the housing, and led out from the side outlet. This reduces the exposed cable length, utilizes the metal material of the housing to shield external electromagnetic interference, and avoids direct exposure of the cable for wear or pulling, thus extending its service life. The axial fixation of the coil assembly relies on a combination of positioning plate pre-compression and screw ring locking. The positioning plate directly presses against one end face of the coil assembly, and the screw ring slowly tightens through its threaded engagement with the housing, transferring the axial pre-compression force to the positioning plate, thereby pressing the coil assembly and fixing its relative position to the housing, preventing axial displacement during operation.

[0004] However, while the hollow housing design provides space to accommodate the coil assembly, it lacks guiding constraints on the coil assembly, leading to potential positional deviations during installation. The cable folding structure designed for electromagnetic shielding, in turn, causes further skew of the coil assembly due to tension during cable folding, disrupting its coaxiality with the housing. Although the fixing method of the positioning plate and screw rings is intended to secure the coil assembly through preload, the tightening of the screw rings can easily cause slight displacement of the positioning plate, resulting in further changes in the positional relationship between the coil assembly and the housing. These defects necessitate repeated adjustments to the positional relationship between the coil assembly and the housing during assembly, significantly extending the manufacturing cycle and contradicting the requirements for mass production of dual-redundant linear displacement sensors. Summary of the Invention

[0005] This invention aims to at least partially solve one of the technical problems in the aforementioned technologies, addressing the issues of repeated adjustments caused by the lack of guiding constraints on the coil assembly, cable folding and misalignment, and screw displacement during the assembly of existing dual-redundant linear displacement sensors. Therefore, the purpose of this invention is to propose an auxiliary assembly device and method for dual-redundant linear displacement sensors. This device constrains the positional relationship between the two coil assemblies and the housing, eliminating the need for repeated disassembly and adjustment steps and improving production efficiency.

[0006] To achieve the above objectives, embodiments of the present invention provide an auxiliary assembly device for a dual-redundant linear displacement sensor. The dual-redundant linear displacement sensor includes a housing, a dual-redundant coil assembly, a positioning plate, and a screw ring. The dual-redundant coil assembly is installed inside the housing. The positioning plate presses down on the dual-redundant coil assembly and is secured by the tightened screw ring. The auxiliary assembly device includes: A positioning component for positioning the housing and guiding the dual-redundant coil assembly into the housing; A limiting component is used to hold the dual-redundant coil assembly within the housing to limit the displacement of the dual-redundant coil assembly during the tightening of the screw.

[0007] An auxiliary assembly device for a dual-redundant linear displacement sensor according to an embodiment of the present invention positions the housing and guides the dual-redundant coil assembly into place using a positioning component. A limiting component presses down on the dual-redundant coil assembly to prevent displacement when the screw is tightened. In this way, the limiting component and the positioning component constrain the positional relationship between the dual-redundant coil assembly and the housing, solving the problem of easily changing positional relationships in existing assembly processes, reducing repeated adjustment steps, and improving production efficiency.

[0008] In addition, the auxiliary assembly device for a dual-redundant linear displacement sensor proposed in the above embodiments of the present invention may also have the following additional technical features: Optionally, the positioning assembly includes a positioning base and at least two positioning rods. The positioning base has a positioning groove adapted to the bottom contour of the housing. The positioning rods pass through a through hole in the bottom of the housing and are adapted to engage with the channel of the dual-redundant coil assembly to guide the dual-redundant coil assembly into the housing. The positioning rods passing through the through hole in the housing and engaging with the channel of the dual-redundant coil assembly ensures the coaxiality of the dual-redundant coil assembly and the housing, preventing skewing during installation and further improving assembly accuracy.

[0009] Furthermore, the positioning rod is detachably mounted on the positioning base. This detachable mounting accommodates products with dual-redundant housing through-hole spacing ranging from 9 to 15 mm, improving the device's versatility and applicability.

[0010] Furthermore, at least two positioning rods are spaced apart and vertically arranged on the positioning base, and each positioning rod is coaxially arranged with each through hole of the housing. The spaced-apart vertical positioning rods and their coaxiality with the through holes of the housing can ensure the coaxiality between the through holes of the housing and the coil assembly.

[0011] Optionally, the limiting component includes a holding base and at least two holding rods. The holding base supports the holding rods and applies pressure. The holding rods contact the end face of the dual-redundant coil assembly away from the positioning component and apply axial holding force to limit the displacement of the dual-redundant coil assembly during the tightening of the screw. The holding rods contacting the coil end face and applying axial holding force effectively prevents the coil assembly from shifting during screw tightening, ensuring the accuracy of the positional relationship after assembly and reducing the adjustment frequency.

[0012] Embodiments of the present invention also propose an assembly method for a dual-redundant linear displacement sensor, which employs the aforementioned auxiliary assembly device and includes the following steps: S1. Place the housing of the dual-redundant linear displacement sensor on the positioning base of the positioning assembly, and use the positioning rod of the positioning assembly to guide the dual-redundant coil assembly into the housing; S2. A positioning plate and a screw ring are sequentially installed on the dual-redundancy coil assembly inside the housing. S3. Use the holding rod of the limiting component to press the end face of the dual-redundant coil assembly away from the positioning component; S4. Tighten the screw ring to secure the dual-redundant coil assembly inside the housing; S5. Move the positioning component and the limiting component away from the dual-redundant linear displacement sensor, and weld them at the contact position between the housing and the dual-redundant coil component.

[0013] An assembly method for a dual-redundant linear displacement sensor according to an embodiment of the present invention uses an auxiliary device to constrain the positional relationship between the dual-redundant coil assembly and the housing, thereby solving the problem of repeated adjustments in existing assembly processes and improving assembly efficiency and product quality.

[0014] Furthermore, the assembly method for a dual-redundant linear displacement sensor proposed in the above embodiments of the present invention may also have the following additional technical features: Optionally, in step S1, the positioning rods of the positioning assembly pass through the through holes at the bottom of the housing, and each positioning rod is coaxially arranged with each through hole of the housing. The positioning rods passing through the through holes and being coaxially arranged ensures the coaxiality of the housing and the coil assembly, avoids positional deviations when the coil assembly is installed, and improves assembly accuracy.

[0015] Optionally, in step S1, guiding the dual-redundant coil assembly into the housing using the positioning rod of the positioning component includes: The channels of the dual-redundant coil assembly are fitted one-to-one into each of the positioning rods and then installed into the housing. The cable of the dual-redundant coil assembly is folded back through the housing and led out from the cable outlet on the side of the housing. The positioning rod cooperates with the coil channel to further ensure the accurate positional relationship between the coil assembly and the housing, and can prevent the coil assembly from tilting when the cable is led out, reducing the adjustment steps after assembly and shortening the manufacturing cycle.

[0016] Optionally, in step S3, the holding rod of the limiting component contacts the end face of the dual-redundant coil assembly away from the positioning component, and applies an axial holding force. The holding rod contacts the end face of the coil and applies an axial force to prevent the coil assembly from shifting when the screw is tightened, ensuring the stability of the positional relationship during assembly and improving the assembly success rate. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of a dual-redundant linear displacement sensor and an auxiliary assembly device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of a dual-redundant linear displacement sensor according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of some components of a dual-redundant linear displacement sensor according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a dual-redundant linear displacement sensor according to an embodiment of the present invention.

[0018] Label Explanation: Dual-redundant linear displacement sensor 100, housing 110, through hole 111, dual-redundant coil assembly 120, frame 121, channel 1211, first magnetic conductive sheet 122, first insulating sheet 123, enameled wire 124, magnetic cover 125, second insulating sheet 126, second magnetic conductive sheet 127, frame end plate 128, positioning plate 130, screw ring 140, pull rod 150, connecting cover 160, retaining ring 170, transition rod 180, rear end cover 190; Auxiliary assembly device 200, positioning component 210, positioning base 211, positioning groove 2111, positioning rod 212, limiting component 220, pressing base 221, pressing rod 222. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0020] The following is in conjunction with the appendix Figures 1-4 The auxiliary assembly apparatus for a dual-redundant linear displacement sensor according to an embodiment of the present invention is described in detail.

[0021] The auxiliary assembly device for a dual-redundant linear displacement sensor according to an embodiment of the present invention aims to solve the problem of low production efficiency caused by repeated adjustments due to the lack of guiding constraints on the coil assembly, cable folding and skew, and screw tightening displacement during the assembly process of existing dual-redundant linear displacement sensors.

[0022] Among them, such as Figures 2-4As shown, the dual-redundant linear displacement sensor 100 to be assembled in this embodiment includes a housing 110, a dual-redundant coil assembly 120, a positioning plate 130, and a screw ring 140. The housing 110 is the external support structure of the dual-redundant linear displacement sensor 100 and is in the shape of a hollow cylinder. The front end of the housing 110 is provided with two through holes 111, which are used to insert the skeleton 121 of the coil assembly 120; the side of the housing 110 has a cable outlet, which allows the cable of the coil assembly 120 to be folded back and led out, reducing the exposed length of the cable and avoiding direct wear or pulling of the cable. Two coil assemblies 120 are installed in parallel within the housing 110. Each coil assembly 120 includes a frame 121, a first magnetic sheet 122, a first insulating sheet 123, an enameled wire 124, a magnetic cover 125, a second insulating sheet 126, a second magnetic sheet 127, and a frame end plate 128. The frame 121 has a channel 1211 with one end open. The enameled wire 124 is arranged on both sides of the channel 1211. The first insulating sheet 123 and the second insulating sheet 126 are respectively arranged at the front and rear ends of each enameled wire 124. The first magnetic sheet 122 and the second magnetic sheet 127 are arranged one-to-one on the first insulating sheet 123 and the second insulating sheet 126, with the first magnetic sheet 122 in contact with the frame 121 and the second magnetic sheet 127 in contact with the frame end plate 128. The magnetic cover 125 is correspondingly arranged on the outside of the enameled wire 124 and covers the insulating sheet and the magnetic sheet. The open end of the channel 1211 of the frame 121 is embedded into the through hole 111 of the housing 110 and is flush with the outer end face of the through hole 111 for welding after assembly. The rear end of the frame 121 is fitted with the frame end plate 128. The two coil assemblies 120 realize two independent linear displacement sensing, and the dual-redundancy design ensures normal system operation in the event of a single-channel failure. The positioning plate 130 covers the frame end plate 128 of the two coil assemblies 120, and the positioning plate 130 has two through holes, which are coaxial with the two coil assemblies 120. The positioning plate 130 is used to transmit the axial preload of the screw ring 140, uniformly pressing the dual-redundancy coil assembly 120 to prevent its axial displacement. The screw ring 140 is threaded into the inner wall of the housing 110. After tightening, it presses against the positioning plate 130, transmitting the preload to the coil assembly 120, thereby fixing the coil assembly 120 to the housing 110. In addition, the dual-redundant linear displacement sensor 100 also includes a pull rod 150, a connecting cover 160, a retaining ring 170, and a transition rod 180. After the housing 110 is assembled with the coil assembly 120, the positioning plate 130, and the screw ring 140, and after the frame 121 is welded to the housing 110, the pull rod 150 is used to insert into the channel 1211. The pull rod 150 is provided with an iron core, and the end inserted into the channel 1211 is provided with a friction block. There are also two pull rods 150 corresponding to the dual-redundant coil assembly 120. The two pull rods 150 are assembled through the connecting cover 160. In addition, the transition rod 180 is assembled on the connecting cover 160 through a bearing, and the end of the bearing is provided with a retaining ring 170 (including inner and outer retaining rings).

[0023] like Figure 1 As shown, the auxiliary assembly device 200 for a dual-redundant linear displacement sensor according to an embodiment of the present invention includes a positioning component 210 and a limiting component 220.

[0024] Specifically, the positioning component 210 is used to position the housing 110 and guide the dual-redundant coil assembly 120 into the housing 110; The limiting component 220 is used to press the double redundant coil assembly 120 inside the housing 110 to limit the displacement of the double redundant coil assembly 120 during the tightening of the screw ring 140.

[0025] Therefore, according to an embodiment of the present invention, an auxiliary assembly device for a dual-redundant linear displacement sensor positions the housing 110 through a positioning component 210 and guides the dual-redundant coil assembly 120 into place. A limiting component 220 presses the dual-redundant coil assembly 120 to prevent displacement when the screw ring 140 is tightened. In this way, the limiting component 220 and the positioning component 210 constrain the positional relationship between the dual-redundant coil assembly 120 and the housing 110, solving the problem of easily changing positional relationship in existing assembly, reducing repeated adjustment steps, and improving production efficiency.

[0026] According to one or more embodiments of the present invention, the positioning assembly 210 includes a positioning base 211 and at least two positioning rods 212. The positioning base 211 is provided with a positioning groove 2111 adapted to the bottom contour of the housing 110. The positioning rods 212 pass through the through hole 111 at the bottom of the housing 110 and are adapted to cooperate with the channel 1211 of the double-redundant coil assembly 120 to guide the double-redundant coil assembly 120 into the housing 110. The positioning rods 212 passing through the through hole 111 of the housing 100 and cooperating with the channel 1211 of the double-redundant coil assembly 120 ensure the coaxiality of the double-redundant coil assembly 120 and the housing 110, avoid the double-redundant coil assembly 120 from being misaligned during installation, and further improve the assembly accuracy. Specifically, when the dual-redundant coil assembly 120 is installed into the housing 110, the open opening on the skeleton 121 of the coil assembly 120 is inserted into the housing 110, and the open opening is aligned with the positioning rod 212 so that the positioning rod 212 is inserted into the channel 1211, thereby using the positioning rod 212 to guide the dual-redundant coil assembly 120 into the housing 110.

[0027] The positioning base 211 has a positioning groove 2111 on its top that is perfectly adapted to the bottom contour of the housing 110. The depth of the positioning groove 2111 is sufficient to prevent radial displacement after the housing 110 is placed.

[0028] According to one or more embodiments of the present invention, the positioning rod 212 is detachably mounted on the positioning base 211. The detachable positioning rod 212 is compatible with product specifications where the through-hole spacing of the dual-redundant housing ranges from 9 to 15 mm, thus improving the versatility and applicability of the device.

[0029] Furthermore, at least two positioning rods 212 are spaced apart and vertically arranged on the positioning base 211, and each positioning rod 212 is coaxially arranged with each through hole 111 of the housing 110. The positioning rods 212 are spaced apart and vertically arranged and coaxial with the through holes 111 of the housing 110, which can ensure the coaxiality of the through holes 111 of the housing 110 and the coil assembly.

[0030] Specifically, such as Figure 1 As shown, two positioning rods 212 are threadedly connected at intervals and vertically to the bottom of the positioning groove 2111 of the positioning base 211, making the positioning rods 212 detachable. The detachable positioning rods 212 allow the device to be compatible with product specifications ranging from 9 to 15 mm in the through hole spacing of the dual-redundant housing by replacing the positioning rods 212 with different spacings. The axis of the positioning rod 212 is coaxial with the axis of the two through holes 111 of the housing 110. The outer diameter of the positioning rod 212 is smaller than the inner diameter of the through hole 111 of the housing 110 and smaller than the inner diameter of the channel 1211 of the dual-redundant coil assembly 120, ensuring that the positioning rod 212 can smoothly pass through the through hole 111 of the housing 110 and be inserted into the channel 1211 of the dual-redundant coil assembly 120.

[0031] According to one or more embodiments of the present invention, the gap between the diameter of the two positioning rods 212 of the positioning component 210 and the inner hole of the coil component is controlled within φ0.02mm, the gap between the inner diameter of the positioning groove 2111 of the positioning component 210 and the outer diameter of the housing 110 is controlled within φ0.02mm, and the coaxiality between the positioning groove 2111 of the positioning component 210 and the outer diameter of the housing is controlled within φ0.02mm.

[0032] According to one or more embodiments of the present invention, the limiting component 220 includes a holding base 221 and at least two holding rods 222. The holding base 221 supports the holding rods 222 and applies pressure. The holding rods 222 contact the end face of the double-redundant coil assembly 120 away from the positioning component 210 and apply axial holding force to limit the displacement of the double-redundant coil assembly 120 during the tightening of the screw ring 140. The holding rods 222 contact the end face of the coil (i.e., the outer end of the skeleton end plate 128) and apply axial holding force, effectively preventing the coil assembly from shifting during the tightening of the screw ring 140, ensuring the accuracy of the positional relationship after assembly, and reducing the adjustment frequency.

[0033] Specifically, the clamping base 221 is a rectangular plate structure. The top of the clamping base 221 has a gripping part for applying axial pressure. Axial clamping force applied manually or with a small pressure device can limit the axial displacement of the double-redundant coil assembly 120 during the tightening of the screw ring 140. Two clamping rods 222 are vertically fixed to the bottom surface of the clamping base 221, with their spacing set such that their axes correspond one-to-one with the axes of the two coil assemblies. The clamping rods 222 can be inserted into the through hole of the positioning plate 130 and then contact the end face of the double-redundant coil assembly 120 away from the positioning assembly 210 (the outer end of the skeleton end plate 128).

[0034] According to one or more embodiments of the present invention, the height difference between the two holding rods 222 of the limiting component 220 is controlled within 0.02 mm, and the diameter of the two holding rods 222 does not exceed the outer diameter of the coil component.

[0035] The specific steps for assembling the dual-redundant linear displacement sensor 100 using the aforementioned auxiliary assembly device 200 are as follows: S1. Place the housing 110 of the dual-redundant linear displacement sensor 100 on the positioning base 211 of the positioning assembly 210, and use the positioning rod 212 of the positioning assembly 210 to guide the dual-redundant coil assembly 120 into the housing 110.

[0036] Specifically, based on the channel 1211 spacing of the two skeletons 121 of the dual-redundant linear displacement sensor 100 to be assembled, a positioning rod 212 with the corresponding spacing is selected and installed on the positioning base 211; the front end of the housing 110 is placed downward in the positioning groove 2111 of the positioning base 211, ensuring that the end of the housing 110 is in close contact with the inner wall of the positioning groove 2111 without looseness. At this time, the two positioning rods 212 on the positioning base 211 pass through the two through holes 111 of the housing 110 respectively, and the top end of the positioning rod 212 extends into the interior of the housing 110.

[0037] The channels 1211 of the two skeletons 121 of the dual-redundant coil assembly 120 are fitted one-to-one into the two positioning rods 212, and slowly pushed into the housing 110 along the axial direction of the positioning rods 212 until the skeletons 121 of the dual-redundant coil assembly 120 are embedded in the through holes 111 of the housing 110, and the open opening of the channel 1211 is flush with the end face of the through hole 111 of the housing 110; then the cable of the dual-redundant coil assembly 120 is folded back and passed through the cable channel inside the housing 110, and led out from the cable outlet on the side of the housing 120. During the lead-out process, the cable tension is kept uniform to avoid displacement of the dual-redundant coil assembly 120 due to cable pulling; the cable outlet is sealed by a sealing block.

[0038] S2. Install the positioning plate 130 and the screw ring 140 sequentially on the double-redundant coil assembly 120 inside the housing 110. Specifically, fit the positioning plate 130 onto the skeleton end plate 120 of the double-redundant coil assembly 120, ensuring that the two through holes of the positioning plate 130 are respectively fitted onto the top protrusions of the skeleton end plate 120 of the double-redundant coil assembly 120, and that the bottom surface of the positioning plate 130 is completely in contact with the end face of the skeleton end plate 120; then screw the screw ring 140 into the top opening of the housing 110 through the threaded engagement, initially tightening it until the bottom surface of the screw ring 140 contacts the top surface of the positioning plate 130, without applying any locking force.

[0039] S3. Use the holding rod 222 of the limiting component 220 to press the end face of the double redundancy coil assembly 120 away from the positioning component 210.

[0040] Specifically, the holding base 221 of the limiting component 220 can be held by hand, and the two holding rods 222 can be aligned with the corresponding areas at the top of the double redundancy coil assembly 120, and pressure can be slowly applied downwards to make the bottom of the holding rod 222 in close contact with the top end face of the skeleton end plate 120, maintaining a constant axial holding force to ensure that the double redundancy coil assembly 120 will not be axially or radially displaced during the subsequent tightening of the screw ring 140.

[0041] S4. Tighten the screw ring 140 to secure the double-redundant coil assembly 120 inside the housing 110. Specifically, a torque wrench can be used to slowly tighten the screw ring 140, maintaining the holding force of the limiting component 220 during the tightening process until the screw ring 140 is completely locked. The positioning plate 130 uses the axial pressure of the screw ring 140 to firmly press the double-redundant coil assembly 120 into the housing 110. At this time, the positional relationship between the double-redundant coil assembly 120 and the housing 110 is completely fixed.

[0042] S5. Remove the positioning component 210 and the limiting component 220 from the dual-redundant linear displacement sensor 100, and weld them at the contact position between the housing 110 and the dual-redundant coil assembly 120. Specifically, release the holding force of the limiting component 220 and remove the limiting component 220 from the top of the housing 110; then remove the assembled sensor assembly from the positioning base 211 of the positioning component 210, so that the positioning rod 212 is disengaged from the channel 1211; finally, use laser welding at the contact position between the through hole 111 of the housing 110 and the open opening of the channel 1211 of the skeleton 121 of the dual-redundant coil assembly 120 (e.g., ...). Figure 3 Welding is performed at the welding position shown, with the welding point welded around the entire contact circumference to ensure permanent fixation of the housing 110 and the double-redundant coil assembly 120; the rear end of the housing 110 (i.e. the end equipped with the screw ring 140) is sealed by the rear end cover 190; thus completing the entire assembly process.

[0043] An assembly method for a dual-redundant linear displacement sensor according to an embodiment of the present invention uses an auxiliary device to constrain the positional relationship between the dual-redundant coil assembly 120 and the housing 110, solving the problem of repeated adjustments in existing assembly processes and improving assembly efficiency and product quality. This auxiliary device is compatible with product specifications where the through-hole spacing of the dual-redundant housing ranges from 9 to 15 mm; it ensures the coaxiality of the through-holes of the housing 110 and the coil assembly.

[0044] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0046] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0049] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An auxiliary assembly device for a dual-redundant wire displacement sensor, the dual-redundant wire displacement sensor including a housing, a dual-redundant wire pack assembly, a positioning plate, and a screw, the dual-redundant wire pack assembly being housed within the housing, the positioning plate pressing against the dual-redundant wire pack assembly and being held against by the screw that is tightened to secure the dual-redundant wire pack assembly, characterized in that, The auxiliary assembly device comprises: a positioning assembly for positioning the shell and guiding the double-redundancy wire package assembly into the shell; a limiting assembly for pressing the double-redundancy wire package assembly in the shell to limit displacement of the double-redundancy wire package assembly during screwing of the coil.

2. The assembly aid of claim 1, wherein, The positioning assembly comprises a positioning base and at least two positioning rods, the positioning base is provided with a positioning groove matching the bottom profile of the shell, and the positioning rods pass through the through holes in the bottom of the shell and are adapted to cooperate with the passages of the double-redundancy wire package assembly to guide the double-redundancy wire package assembly into the shell.

3. The assembly aid of claim 2, wherein, The positioning rods are detachably arranged on the positioning base.

4. The assembly aid of claim 2, wherein, The at least two positioning rods are arranged in a spaced and upright manner on the positioning base, and each positioning rod is coaxially arranged with each through hole of the shell.

5. The assembly aid of claim 1, wherein, The limiting assembly comprises a pressing base and at least two pressing rods, the pressing base is used for supporting the pressing rods and applying pressure, and the pressing rods are in contact with the end face of the end of the double-redundancy wire package assembly away from the positioning assembly and apply axial pressing force to limit displacement of the double-redundancy wire package assembly during screwing of the coil.

6. A method of assembling a dual-redundancy linear displacement sensor, the method comprising: The auxiliary assembly device of any one of claims 1-5 is used for assembly, comprising the following steps: S1, placing the shell of the double-redundancy wire displacement sensor on the positioning base of the positioning assembly, and guiding the double-redundancy wire package assembly into the shell by using the positioning rods of the positioning assembly; S2, sequentially arranging a positioning plate and a coil on the double-redundancy wire package assembly in the shell; S3, pressing the end face of the end of the double-redundancy wire package assembly away from the positioning assembly by using the pressing rods of the limiting assembly; S4, screwing the coil to fasten the double-redundancy wire package assembly in the shell; S5, moving the positioning assembly and the limiting assembly away from the double-redundancy wire displacement sensor, and welding the contact position between the shell and the double-redundancy wire package assembly.

7. The method of assembly of claim 6, wherein, In step S1, the positioning rods of the positioning assembly pass through the through holes in the bottom of the shell, and each positioning rod is coaxially arranged with each through hole of the shell.

8. The method of assembling as defined in claim 6, wherein, In step S1, guiding the double-redundancy wire package assembly into the shell by using the positioning rods of the positioning assembly comprises: sleeving the passages of the double-redundancy wire package assembly one by one into each positioning rod to assemble into the shell; folding the cable of the double-redundancy wire package assembly through the shell and leading out from the cable outlet on the side of the shell.

9. The method of assembly of claim 6, wherein, In step S3, the pressing rods of the limiting assembly are in one-to-one contact with the end face of the end of the double-redundancy wire package assembly away from the positioning assembly and apply axial pressing force.

Images