Miniaturized displacement sensor

Abstract

The utility model provides a miniaturized displacement sensor, which relates to the technical field of sensors and comprises a shell provided with a mounting cavity; the sensitive component is arranged in the mounting cavity; one end of the cable extends into the mounting cavity and is electrically connected with the sensitive component; the measuring rod is fixedly connected with the shell; the annular magnet is movably arranged on the measuring rod; the shell comprises an electronic bin, at least one part of the outer wall of the electronic bin is provided with mounting threads, the electronic bin is provided with a first end and a second end which are oppositely arranged, and the second end is fixedly connected with the measuring rod; the wire holder is arranged at the first end, and the wire holder is in sealed connection with the electronic bin and defines a mounting cavity; the shell is provided with a first structure convenient to mount and dismount. According to the technical scheme of the utility model, the installation threads are arranged on the outer wall of the electronic bin, so that a worker can conveniently install or detach the miniaturized displacement sensor, the operation is easy, the installation precision of the miniaturized displacement sensor can be improved, the displacement condition can be avoided, and the measurement precision can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, and in particular to a miniaturized displacement sensor. Background Art

[0002] In the related art, it is not easy for workers to operate when installing the displacement sensor, and after the displacement sensor is installed in the reserved hole of the oil cylinder, the displacement sensor may move, thereby affecting the measurement accuracy. Utility Model Content

[0003] In order to solve or improve the technical problems of being difficult to operate during installation and being easy to move after installation, the utility model aims to provide a miniaturized displacement sensor.

[0004] To achieve the above-mentioned purpose, the utility model provides a miniaturized displacement sensor, including a housing, a sensitive component, a cable, a measuring rod and a ring magnet.

[0005] An installation cavity is provided inside the housing. The sensitive component is arranged in the installation cavity. One end of the cable can extend into the installation cavity and be electrically connected to the sensitive component. The measuring rod is fixedly connected to the housing. The annular magnet is movably arranged on the measuring rod.

[0006] The housing includes an electronics compartment and a wiring socket.

[0007] At least a portion of the outer wall of the electronic compartment is provided with a mounting thread. The electronic compartment has a first end and a second end which are arranged opposite to each other. The second end is used for fixed connection with the measuring rod.

[0008] The wiring seat is arranged at the first end. The wiring seat is sealed and connected to the electronic compartment. The wiring seat and the electronic compartment surround an installation cavity. One end of the cable is passed through the wiring seat and extends into the installation cavity, so that one end of the cable is electrically connected to the sensitive component.

[0009] The shell is provided with a first structure which is convenient for installation and disassembly.

[0010] The utility model aims to provide a miniaturized displacement sensor. In the first aspect, at least a portion of the outer wall of the electronic compartment is provided with a mounting thread. By providing the mounting thread on the outer wall of the electronic compartment, it is convenient for staff to install or disassemble the miniaturized displacement sensor (only rotation is required to achieve installation or disassembly of the miniaturized displacement sensor). The operation is easy and is beneficial to improving the installation accuracy of the miniaturized displacement sensor and avoiding movement, thereby ensuring the measurement accuracy of the miniaturized displacement sensor. In the second aspect, a first structure that is convenient for installation and disassembly is provided on the outer casing. By providing the first structure, it is convenient for staff to rotate the miniaturized displacement sensor as a whole to achieve rapid installation and disassembly of the miniaturized displacement sensor.

[0011] It should be noted that the miniaturized displacement sensor of the utility model has the characteristics of compact structure, convenient assembly and disassembly, easy maintenance and modular design, and has a wider range of applications.

[0012] In addition, the above technical solution provided by the utility model may also have the following additional technical features:

[0013] In some technical solutions, optionally, the first structure is a boss structure and / or a groove structure.

[0014] In this technical solution, when the first structure is a boss structure, the staff can use the boss structure as a force application point and rotate the shell by tools or hand-tightening to achieve rapid installation and disassembly of the miniaturized displacement sensor.

[0015] When the first structure is a groove structure, the staff can use the groove structure as a force application point to rotate the shell by means of tools or hand-tightening, so as to achieve rapid installation and disassembly of the miniaturized displacement sensor.

[0016] In some technical solutions, optionally, the electronic compartment includes a first part and a second part. One end of the first part is a first end. One end of the second part is connected to the other end of the first part. The other end of the second part is a second end, and the mounting thread is provided on the outer wall of the second part. The first part and the second part are an integrated structure.

[0017] In this technical solution, the first part and the second part are an integrated structure, that is, the electronic compartment is an integral structure. Compared with the post-processing method, this design method has good mechanical properties, higher connection strength and sealing performance, which is conducive to reducing the number of parts and improving assembly efficiency. This design method can also make the structure of the miniaturized displacement sensor more compact.

[0018] In some technical solutions, optionally, a sealing groove is provided on the outer wall of the electronic compartment. The miniaturized displacement sensor further comprises a first sealing member. The first sealing member is sleeved on the electronic compartment, and at least a portion of the first sealing member is provided in the sealing groove.

[0019] In this technical solution, the mutual cooperation between the sealing groove and the first sealing member is conducive to improving the sealing performance between the electronic compartment and the reserved hole. Optionally, the electronic compartment is provided with a sealing groove at the root of the mounting thread, and the sealing groove is used to place an O-ring (first sealing member) to ensure the sealing performance between the electronic compartment and the reserved hole.

[0020] In some technical solutions, optionally, the wiring seat includes a third part and a fourth part. One end of the third part is sealed and connected to the first end. One end of the fourth part is connected to the other end of the third part. The fourth part is provided with a first structure. The third part and the fourth part are an integrated structure.

[0021] In this technical solution, the third part and the fourth part are an integrated structure, that is, the terminal block is an integral structure. Compared with the post-processing method, this design method has good mechanical properties, higher connection strength and sealing performance, which is conducive to reducing the number of parts and improving assembly efficiency. This design method can also make the structure of the miniaturized displacement sensor more compact.

[0022] In addition, by setting the first structure on the fourth part of the terminal socket, it is convenient for the staff to rotate the terminal socket, which is conducive to the rapid pre-installation of the terminal socket. After the terminal socket and the electronic compartment are relatively fixed (for example, relatively fixed by welding), the staff can also rotate the miniaturized displacement sensor as a whole through the first structure to achieve rapid installation and disassembly of the miniaturized displacement sensor.

[0023] In some technical solutions, optionally, a first mounting hole is provided at the second end, and the first mounting hole is connected to the mounting cavity. At least a portion of the measuring rod is arranged in the first mounting hole. The miniaturized displacement sensor also includes a magnetic induction element. The magnetic induction element is passed through the measuring rod, and one end of the magnetic induction element is electrically connected to the sensitive component.

[0024] In this technical solution, by placing at least a portion of the measuring rod in the first mounting hole, the contact area between the measuring rod and the electronic compartment is increased, thereby improving the connection strength. The measuring rod is welded and fixed to the first mounting hole. This design method can ensure the installation accuracy between the measuring rod and the electronic compartment, thereby improving the measurement accuracy of the miniaturized displacement sensor.

[0025] In some technical solutions, the housing may further include a wire crimping nut. The wire crimping nut is disposed at one end of the wiring seat away from the electronic compartment. The wire crimping nut is sealed and connected to the wiring seat. One end of the cable is passed through the wire crimping nut and the wiring seat and extends into the installation cavity.

[0026] In this technical solution, the cable can be fixed by setting the wire pressing nut, which is also called a wire pressing nail. When the staff disassembles and assembles the wire pressing nut, the cable can be disassembled and assembled at the same time.

[0027] In some technical solutions, optionally, a second mounting hole is provided at one end of the wiring seat away from the electronic compartment, and at least a portion of the wire nut is provided in the second mounting hole.

[0028] In this technical solution, by arranging at least a portion of the wire crimping nut in the second mounting hole, it is beneficial to increase the contact area between the wire crimping nut and the terminal block, thereby improving the connection strength.

[0029] In some technical solutions, optionally, the wire nut is provided with a third mounting hole, and the third mounting hole is a truncated cone. The small end of the third mounting hole is away from the electronic compartment, and the cable is passed through the third mounting hole. The miniaturized displacement sensor also includes a second sealing member. The second sealing member is sleeved on the cable, and the second sealing member is arranged in the third mounting hole.

[0030] In this technical solution, the second sealing member is arranged between the cable and the crimping nut. Optionally, the second sealing member is an annular sealing sleeve. By providing the second sealing member, it is beneficial to improve the sealing performance between the cable and the crimping nut, and between the crimping nut and the terminal block.

[0031] In some technical solutions, optionally, the annular magnet includes an annular mounting frame and a plurality of magnetic cores. The annular mounting frame is movably sleeved on the measuring rod, and the annular mounting frame has a plurality of mounting slots. Each magnetic core is arranged in a corresponding mounting slot.

[0032] In this technical solution, this design method is conducive to optimizing the spatial layout of the annular magnet and ensuring that multiple magnetic cores jointly form a magnetic field that can be sensed by the magnetic induction element.

[0033] Additional aspects and advantages of the technical solution of the present invention will become apparent in the following description or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic structural diagram of a miniaturized displacement sensor according to an embodiment of the utility model is shown;

[0035] Figure 2 A cross-sectional view of a miniaturized displacement sensor according to an embodiment of the utility model is shown;

[0036] Figure 3 A schematic structural diagram of a ring magnet according to an embodiment of the utility model is shown.

[0037] in, Figures 1 to 3 The corresponding relationship between the reference numerals and the component names is as follows:

[0038] 100: miniaturized displacement sensor; 110: housing; 111: electronic compartment; 1112: mounting thread; 1113: first end; 1114: second end; 1115: first mounting hole; 1116: first part; 1117: second part; 1118: sealing groove; 112: terminal block; 1121: third part; 1122: fourth part; 1124: second mounting hole; 113: wire pressing nut; 1131: third mounting hole; 114: mounting cavity; 115: first structure; 120: sensitive component; 130: cable; 141: measuring rod; 142: plug; 150: annular magnet; 151: annular mounting frame; 1511: mounting groove; 152: magnetic core; 161: first sealing member; 162: second sealing member; 171: magnetic sensing element; 172: insulating cover; a: first direction; b: radial direction of the electronic compartment. DETAILED DESCRIPTION

[0039] In order to more clearly understand the above-mentioned purposes, features and advantages of the embodiments of the present invention, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0040] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the embodiments of the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0041] Refer to the following Figures 1 to 3 A miniaturized displacement sensor 100 provided according to some embodiments of the present invention is described.

[0042] In one embodiment of the present invention, Figure 1 and Figure 2 As shown, the miniaturized displacement sensor 100 includes a housing 110 , a sensitive component 120 , a cable 130 , a measuring rod 141 and a ring magnet 150 .

[0043] The housing 110 has an installation cavity 114 disposed therein. The sensitive component 120 is disposed in the installation cavity 114. One end of the cable 130 can extend into the installation cavity 114 and be electrically connected to the sensitive component 120.

[0044] Optionally, the sensitive component 120 includes a signal board. The signal board is installed in the installation cavity 114. One end of the cable 130 is electrically connected to the signal board of the sensitive component 120.

[0045] Optionally, the cable 130 includes a plurality of wire harnesses, at least one wire harness is used for power supply, and at least one wire harness is used for receiving a data conversion signal from a signal board and transmitting the data conversion signal to a control terminal in the form of an electrical signal.

[0046] The measuring rod 141 is fixedly connected to the housing 110. Specifically, one end of the measuring rod 141 is fixedly connected to the housing 110 by welding.

[0047] Optionally, the length direction of the measuring rod 141 is consistent with the first direction a. The first direction a is the length direction of the miniaturized displacement sensor 100 .

[0048] Optionally, the sensitive component 120 further includes a coil. The coil is disposed in the mounting cavity 114 and is connected to the signal board. The coil is disposed on a side of the signal board away from the cable 130 .

[0049] Optionally, the miniaturized displacement sensor 100 further includes a magnetic induction element 171. The magnetic induction element 171 is a waveguide wire. One end of the waveguide wire is connected to the signal board, and the waveguide wire is arranged on the side of the signal board away from the cable 130. The waveguide wire is passed through the coil, the installation cavity 114 and the shell wall of the shell 110, and the other end can extend out of the shell 110. The measuring rod 141 is sleeved on the portion of the waveguide wire extending out of the shell 110.

[0050] Optionally, the length direction of the waveguide wire is consistent with the length direction of the measuring rod 141. The length direction of the waveguide wire is consistent with the first direction a.

[0051] The annular magnet 150 is movably disposed on the measuring rod 141. The annular magnet 150 is also called a magnetic ring, and the annular magnet 150 can move relative to the measuring rod 141.

[0052] It should be noted that the miniaturized displacement sensor 100 is usually disposed in an oil cylinder. Specifically, at least a portion of the housing 110 is disposed in a reserved hole of the oil cylinder. The housing 110 is sealed and connected to the reserved hole.

[0053] Optionally, the annular magnet 150 is used to connect with the piston rod of the oil cylinder. During the movement of the piston rod of the oil cylinder, the relative position between the annular magnet 150 and the waveguide wire is constantly changing. The miniaturized displacement sensor 100 can convert the displacement signal of the annular magnet 150 into an electrical signal, and transmit the electrical signal to the control end through the cable 130. The waveguide wire is used to sense the position of the annular magnet 150 and transmit the induced signal to the sensitive component 120. The signal board of the sensitive component 120 is used to process the position signal and output it.

[0054] The housing 110 includes an electronic compartment 111 and a wiring socket 112 .

[0055] The signal board and the coil of the sensitive component 120 are both arranged in the installation cavity 114. One end of the magnetic induction element 171 (waveguide wire) is connected to the sensitive component 120, and the other end can extend out of the electronic compartment 111.

[0056] Optionally, the miniaturized displacement sensor 100 further includes a mounting seat, which is disposed in the mounting cavity 114, and the sensitive component 120 is disposed on the mounting seat. In other words, the sensitive component 120 is connected to the electronic compartment 111 through the mounting seat.

[0057] Optionally, the sensitive component 120 and the mounting seat are detachably connected (such as snap-on), so that the staff can disassemble and assemble the sensitive component 120, which is convenient for maintenance or replacement.

[0058] In a specific embodiment, the mounting seat includes a first mounting seat, the first mounting seat is arranged in the mounting cavity 114, and the signal board is arranged on the first mounting seat. In other words, the signal board is connected to the electronic compartment 111 through the first mounting seat. The signal board and the first mounting seat are detachably connected.

[0059] In a specific embodiment, the mounting seat includes a second mounting seat, the second mounting seat is disposed in the mounting cavity 114, and the coil is disposed on the second mounting seat. In other words, the coil is connected to the electronic compartment 111 through the second mounting seat. The coil and the second mounting seat are detachably connected.

[0060] At least a portion of the outer wall of the electronic compartment 111 is provided with a mounting thread 1112. By providing the mounting thread 1112 on the outer wall of the electronic compartment 111, it is convenient for the staff to install or remove the miniaturized displacement sensor 100 (only turning is required to install or remove the miniaturized displacement sensor 100), which is easy to operate and is conducive to improving the installation accuracy of the miniaturized displacement sensor 100, avoiding the occurrence of movement, thereby ensuring the measurement accuracy of the miniaturized displacement sensor 100.

[0061] It should be noted that the mounting thread 1112 is an external thread, and the hole wall of the reserved hole is correspondingly provided with an internal thread. Through the cooperation between the external thread and the internal thread, the miniaturized displacement sensor 100 and the reserved hole can be detachably connected. When the miniaturized displacement sensor 100 and the reserved hole are in a connected state, the electronic compartment 111 and the reserved hole are sealed.

[0062] The electronic chamber 111 has a first end 1113 and a second end 1114 arranged opposite to each other. The second end 1114 is used to be fixedly connected to the measuring rod 141. Optionally, the first end 1113 and the second end 1114 are arranged opposite to each other in the first direction a. In other words, the electronic chamber 111 has a first end 1113 and a second end 1114 arranged opposite to each other in the first direction a.

[0063] Optionally, one end of the magnetic sensing element 171 is connected to the sensitive component 120, and the other end of the magnetic sensing element 171 can extend out of the electronic compartment 111 through the second end 1114. The measuring rod 141 is sleeved on the portion of the magnetic sensing element 171 extending out of the electronic compartment 111 through the second end 1114.

[0064] The wiring seat 112 is disposed at the first end 1113. The wiring seat 112 is sealed and connected to the electronic compartment 111. It should be noted that the wiring seat 112 is also called a tail cover, and the wiring seat 112 and the electronic compartment 111 enclose an installation cavity 114.

[0065] Optionally, the wiring base 112 and the electronic compartment 111 are sealed by welding. Optionally, the wiring base 112 and the electronic compartment 111 are threadedly connected, and when the wiring base 112 and the electronic compartment 111 are in a connected state, the wiring base 112 and the electronic compartment 111 are sealed.

[0066] The wiring socket 112 and the electronic compartment 111 can form a relatively closed overall structure, which can effectively prevent external dust, moisture, corrosive gases or liquids from entering the housing 110, and to a great extent protect the electronic components in the housing 110, ensuring the reliability and stability of the miniaturized displacement sensor 100, which is conducive to extending the service life.

[0067] One end of the cable 130 passes through the wiring seat 112 and extends into the installation cavity 114 , so that the one end of the cable 130 is electrically connected to the sensitive component 120 .

[0068] like Figure 1 As shown, the housing 110 is provided with a first structure 115 for easy installation and removal. The first structure 115 can be any structure that is convenient for the staff to rotate the housing 110, such as a boss structure, a groove structure, etc. Optionally, the first structure 115 is provided on the wiring seat 112. Optionally, the first structure 115 is provided on the electronic compartment 111.

[0069] The utility model aims to provide a miniaturized displacement sensor 100. On the first hand, at least a portion of the outer wall of the electronic compartment 111 is provided with a mounting thread 1112. By providing the mounting thread 1112 on the outer wall of the electronic compartment 111, it is convenient for the staff to install or disassemble the miniaturized displacement sensor 100 (only rotation is required to achieve the installation or disassembly of the miniaturized displacement sensor 100). It is easy to operate and is beneficial to improving the installation accuracy of the miniaturized displacement sensor 100, avoiding the occurrence of swaying, thereby ensuring the measurement accuracy of the miniaturized displacement sensor 100. On the second hand, a first structure 115 that is convenient for installation and disassembly is provided on the housing 110. By providing the first structure 115, it is convenient for the staff to rotate the miniaturized displacement sensor 100 as a whole, so as to achieve rapid installation and disassembly of the miniaturized displacement sensor 100.

[0070] It should be noted that the miniaturized displacement sensor 100 of the present invention has the characteristics of compact structure, convenient assembly and disassembly, easy maintenance and modular design, and has a wider range of applications.

[0071] In some embodiments, optionally, the first structure 115 is a boss structure and / or a groove structure.

[0072] When the first structure 115 is a boss structure, the staff can use the boss structure as a force application point to rotate the housing 110 by means of tools or hand-tightening, so as to achieve rapid installation and removal of the miniaturized displacement sensor 100 .

[0073] When the first structure 115 is a groove structure, the staff can use the groove structure as a force application point to rotate the housing 110 by means of tools or hand-tightening, so as to achieve rapid installation and removal of the miniaturized displacement sensor 100 .

[0074] Optionally, the first structure 115 is provided on the electronic compartment 111, and the first structure 115 is a boss structure. In other words, a boss structure is provided on the electronic compartment 111, so that the staff can rotate the electronic compartment 111 or the miniaturized displacement sensor 100 as a whole through the boss structure. The boss structure is used as a force application point, and the electronic compartment 111 is rotated or the miniaturized displacement sensor 100 is rotated as a whole by means of tools or hand twisting.

[0075] Optionally, the first structure 115 is provided in the electronic compartment 111, and the first structure 115 is a groove structure. In other words, the electronic compartment 111 is provided with a groove structure, which facilitates the staff to rotate the electronic compartment 111 through the groove structure, or to rotate the miniaturized displacement sensor 100 as a whole. The groove structure is used as a force point, and the electronic compartment 111 is rotated by tools or hand twisting, or the miniaturized displacement sensor 100 is rotated as a whole.

[0076] Optionally, the first structure 115 is provided on the wiring base 112, and the first structure 115 is a boss structure. In other words, the wiring base 112 is provided with a boss structure, which facilitates the staff to rotate the wiring base 112 through the boss structure, or to rotate the miniaturized displacement sensor 100 as a whole. The boss structure is used as a force application point, and the wiring base 112 is rotated by tools or hand twisting, or the miniaturized displacement sensor 100 is rotated as a whole.

[0077] Optionally, the first structure 115 is provided on the wiring base 112, and the first structure 115 is a groove structure. In other words, the wiring base 112 is provided with a groove structure, which facilitates the staff to rotate the wiring base 112 through the groove structure, or to rotate the miniaturized displacement sensor 100 as a whole. The groove structure is used as a force application point, and the wiring base 112 is rotated by tools or hand twisting, or the miniaturized displacement sensor 100 is rotated as a whole.

[0078] In a specific embodiment, the outer contour of the boss structure is a polygon, such as a quadrilateral, a pentagon, a hexagon, etc.

[0079] In a specific embodiment, the inner contour of the groove structure is a polygon, such as a quadrilateral, a pentagon, a hexagon, etc.

[0080] In a specific embodiment, Figure 1 As shown, the first structure 115 is provided on the wiring seat 112, and the first structure 115 is a polygonal boss. By providing the polygonal boss, the staff can rotate the wiring seat 112 or the miniaturized displacement sensor 100 as a whole by using a tool; the staff can also rotate the wiring seat 112 or the miniaturized displacement sensor 100 as a whole by hand-twisting.

[0081] In some embodiments, optionally, Figure 1 and Figure 2 As shown, the electronic compartment 111 includes a first portion 1116 and a second portion 1117. One end of the first portion 1116 is the first end 1113 of the electronic compartment 111. One end of the second portion 1117 is connected to the other end of the first portion 1116. The other end of the second portion 1117 is the second end 1114 of the electronic compartment 111, and the mounting thread 1112 is provided on the outer wall of the second portion 1117. The first portion 1116 and the second portion 1117 are an integrated structure.

[0082] The first part 1116 and the second part 1117 are an integrated structure, that is, the electronic compartment 111 is an integrated structure. Compared with the post-processing method, this design method has good mechanical properties, higher connection strength and sealing performance, which is conducive to reducing the number of parts and improving assembly efficiency. This design method can also make the structure of the miniaturized displacement sensor 100 more compact.

[0083] It should be emphasized that the electronic compartment 111 is divided into two parts, specifically a first part 1116 and a second part 1117, and the mounting thread 1112 is provided on the outer wall of the second part 1117. This design method is conducive to optimizing the spatial layout of the electronic compartment 111, ensuring that the electronic compartment 111 can be sealed and connected with the reserved hole, while making the structure of the electronic compartment 111 more compact.

[0084] In a specific embodiment, the dimension of the first portion 1116 in the first direction a is C, and the dimension of the second portion 1117 in the first direction a is D. C and D satisfy the following condition: 0.8C≤D≤1.2C.

[0085] By limiting the size relationship between the first portion 1116 and the second portion 1117 , it is helpful to optimize the spatial layout of the electronic compartment 111 , making the structure of the miniaturized displacement sensor 100 more compact.

[0086] In some embodiments, optionally, the first portion 1116 is a cylinder, the second portion 1117 is a cylinder, and the radial dimension of the second portion 1117 is smaller than the radial dimension of the first portion 1116 .

[0087] It should be noted that Figure 1 “b” in denoted by FIG. 1 represents the radial direction of the electronic chamber 111 .

[0088] With this design, a step structure is formed between the first part 1116 and the second part 1117. When the staff installs the miniaturized displacement sensor 100, the step structure of the electronic compartment 111 can cooperate with the corresponding structure in the reserved hole to ensure the installation accuracy of the miniaturized displacement sensor 100, thereby improving the measurement accuracy.

[0089] In a specific embodiment, the radial dimension of the first portion 1116 is E, and the radial dimension of the second portion 1117 is F. E and F satisfy the following condition: 0.7E≤F≤0.9E.

[0090] By limiting the size relationship between the first portion 1116 and the second portion 1117 , it is helpful to optimize the spatial layout of the electronic compartment 111 , making the structure of the miniaturized displacement sensor 100 more compact.

[0091] In some embodiments, optionally, Figure 2As shown, the outer wall of the electronic compartment 111 is provided with a sealing groove 1118 . The miniaturized displacement sensor 100 further includes a first sealing member 161 . The first sealing member 161 is sleeved on the electronic compartment 111 , and at least a portion of the first sealing member 161 is disposed in the sealing groove 1118 .

[0092] The cooperation between the sealing groove 1118 and the first sealing member 161 is helpful to improve the sealing performance between the electronic compartment 111 and the reserved hole.

[0093] In a specific embodiment, the first sealing member 161 is an O-ring.

[0094] In a specific embodiment, the sealing groove 1118 is provided in the second portion 1117, and the sealing groove 1118 is located between the mounting thread 1112 and the first portion 1116. In other words, the electronic compartment 111 is provided with a sealing groove 1118 at the root of the mounting thread 1112, and the sealing groove 1118 is used to place an O-ring to ensure the sealing performance between the electronic compartment 111 and the reserved hole.

[0095] It should be noted that the number of the first seal 161 is at least one, that is, the first seal 161 can be one, two or more. Considering the size of the occupied space, the sealing performance between the electronic compartment 111 and the reserved hole, the cost and other factors, the first seal 161 is flexibly set according to actual needs.

[0096] In some embodiments, optionally, Figure 1 and Figure 2 As shown, the wiring seat 112 includes a third part 1121 and a fourth part 1122. One end of the third part 1121 is sealed and connected to the first end 1113 of the electronic compartment 111. One end of the fourth part 1122 is connected to the other end of the third part 1121. The fourth part 1122 is provided with a first structure 115. The third part 1121 and the fourth part 1122 are an integrated structure.

[0097] The third part 1121 and the fourth part 1122 are an integrated structure, that is, the terminal block 112 is an integrated structure. Compared with the post-processing method, this design method has good mechanical properties, higher connection strength and sealing performance, which is conducive to reducing the number of parts and improving assembly efficiency. This design method can also make the structure of the miniaturized displacement sensor 100 more compact.

[0098] In addition, by setting the first structure 115 on the fourth part 1122 of the wiring socket 112, it is convenient for the staff to rotate the wiring socket 112, which is conducive to the rapid pre-installation of the wiring socket 112. After the wiring socket 112 and the electronic compartment 111 are relatively fixed (for example, relatively fixed by welding), the staff can also rotate the miniaturized displacement sensor 100 as a whole through the first structure 115 to achieve rapid installation and disassembly of the miniaturized displacement sensor 100.

[0099] Optionally, a size of the third portion 1121 in the first direction a is smaller than a size of the fourth portion 1122 in the first direction a.

[0100] In a specific embodiment, the dimension of the third portion 1121 in the first direction a is G, and the dimension of the fourth portion 1122 in the first direction a is H. G and H satisfy the following formula: 2G≤H≤10G.

[0101] By defining the size relationship between the third portion 1121 and the fourth portion 1122 , it is helpful to optimize the spatial layout of the wiring base 112 , so that the structure of the miniaturized displacement sensor 100 is more compact.

[0102] In some embodiments, optionally, Figure 2 As shown, the second end 1114 is provided with a first mounting hole 1115, and the first mounting hole 1115 is communicated with the mounting cavity 114. At least a portion of the measuring rod 141 is disposed in the first mounting hole 1115. The miniaturized displacement sensor 100 further includes a magnetic sensing element 171. The magnetic sensing element 171 is disposed through the measuring rod 141, and one end of the magnetic sensing element 171 is electrically connected to the sensitive component 120.

[0103] By placing at least a portion of the measuring rod 141 in the first mounting hole 1115, it is beneficial to increase the contact area between the measuring rod 141 and the electronic compartment 111, thereby improving the connection strength. The measuring rod 141 is welded and fixed to the first mounting hole 1115. This design method can ensure the installation accuracy between the measuring rod 141 and the electronic compartment 111, thereby improving the measurement accuracy of the miniaturized displacement sensor 100.

[0104] Optionally, the magnetic sensing element 171 is a waveguide wire. One end of the waveguide wire is connected to the signal board of the sensitive component 120, and the waveguide wire is arranged on the side of the signal board away from the cable 130. The waveguide wire is passed through the coil of the sensitive component 120, and the other end can extend out of the electronic compartment 111 through the second end 1114. The measuring rod 141 is sleeved on the portion of the waveguide wire extending out of the electronic compartment 111 through the second end 1114.

[0105] In some embodiments, optionally, Figure 1 and Figure 2As shown, the housing 110 further includes a wire pressing nut 113. The wire pressing nut 113 is disposed at one end of the wiring seat 112 away from the electronic compartment 111. The wire pressing nut 113 is sealedly connected to the wiring seat 112.

[0106] Optionally, the wire nut 113 is sealed and connected to an end of the fourth portion 1122 facing away from the third portion 1121 .

[0107] In a specific embodiment, the wire nut 113 is threadedly connected to the fourth portion 1122 of the wiring seat 112 . When the wire nut 113 and the wiring seat 112 are in a connected state, the wire nut 113 and the wiring seat 112 are sealed and connected.

[0108] One end of the cable 130 is inserted through the crimping nut 113 and the wiring seat 112 and extends into the installation cavity 114 , so that the one end of the cable 130 can be electrically connected to the signal board of the sensitive component 120 .

[0109] By providing the pressing wire nut 113, the cable 130 can be fixed. The pressing wire nut 113 is also called a pressing wire nail. When the staff disassembles and assembles the pressing wire nut 113, the cable 130 can be disassembled and assembled.

[0110] In some embodiments, optionally, Figure 2 As shown, a second mounting hole 1124 is provided at one end of the wiring seat 112 away from the electronic compartment 111 , and at least a portion of the wire nut 113 is disposed in the second mounting hole 1124 .

[0111] Optionally, the second mounting hole 1124 is disposed at an end of the fourth portion 1122 away from the third portion 1121 .

[0112] By disposing at least a portion of the wire nut 113 in the second mounting hole 1124 , it is beneficial to increase the contact area between the wire nut 113 and the wiring seat 112 , thereby improving the connection strength.

[0113] It should be noted that the cable 130 is relatively fixed to the wire nut 113, and the outer wall of the wire nut 113 is threadedly connected to the hole wall of the second mounting hole 1124. This design makes it convenient for the staff to disassemble and assemble the wire nut 113 (just tighten or loosen the wire nut 113), and the staff can disassemble and assemble the cable 130 while disassembling and assembling the wire nut 113.

[0114] In some embodiments, optionally, Figure 2 As shown, the wire pressing nut 113 is provided with a third mounting hole 1131, and the third mounting hole 1131 is a truncated cone. In other words, the third mounting hole 1131 is a trumpet-shaped structure.

[0115] The small end of the third mounting hole 1131 is far away from the electronic compartment 111 , and the large end of the third mounting hole 1131 is close to the electronic compartment 111 .

[0116] The cable 130 is inserted into the third mounting hole 1131 , and the cable 130 is relatively fixed to the wire nut 113 . The miniaturized displacement sensor 100 further includes a second sealing member 162 . The second sealing member 162 is sleeved on the cable 130 , and the second sealing member 162 is disposed in the third mounting hole 1131 .

[0117] The second sealing member 162 is disposed between the cable 130 and the crimping nut 113. Optionally, the second sealing member 162 is an annular sealing sleeve.

[0118] The second sealing member 162 is provided to improve the sealing performance between the cable 130 and the crimping nut 113 , and between the crimping nut 113 and the wiring seat 112 .

[0119] The cable 130 is inserted into the crimping nut 113 and the annular sealing sleeve (second sealing member 162), and the annular sealing sleeve is compressed by tightening the crimping nut 113 and the terminal block 112, thereby fixing and sealing the cable 130. Optionally, one end of the cable 130 is welded to the circuit board (signal board).

[0120] It should be emphasized that by setting the inner side of the wire nut 113 to a trumpet-shaped structure, the annular sealing sleeve is subjected to radial compression force during the installation process, which is conducive to enhancing the fixing force of the cable 130.

[0121] In some embodiments, the crimping nut 113 is optionally fixed to the terminal block 112 by threads, and an annular sealing sleeve (second sealing member 162) is provided in the middle to fix and seal the cable 130. The measuring rod 141 is also called a protective tube, one end of which extends into the electronic compartment 111 and is fixed to the electronic compartment 111 by welding.

[0122] The miniaturized displacement sensor 100 further includes a plug 142 . The plug 142 is disposed at the other end of the measuring rod 141 (the end away from the electronic compartment 111 ). The plug 142 is fixed to the other end of the measuring rod 141 by welding.

[0123] In some embodiments, optionally, Figure 2 As shown, the miniaturized displacement sensor 100 further includes an insulating cover 172, which is disposed in the housing 110, and at least a portion of the sensitive component 120 (such as a coil) is disposed in the insulating cover 172. The insulating cover 172 is used to isolate the electrical components from the housing 110.

[0124] In some embodiments, optionally, Figure 3As shown, the annular magnet 150 includes an annular mounting frame 151 and a plurality of magnetic cores 152. The annular mounting frame 151 is movably sleeved on the measuring rod 141, and the annular mounting frame 151 has a plurality of mounting grooves 1511. Each magnetic core 152 is disposed in a corresponding mounting groove 1511.

[0125] This design method is helpful to optimize the spatial layout of the annular magnet 150 and ensure that the multiple magnetic cores 152 jointly form a magnetic field that can be sensed by the magnetic induction element 171.

[0126] Optionally, the miniaturized displacement sensor 100 further includes a magnetic gasket. The magnetic gasket is disposed between the measuring rod 141 and the annular magnet 150, and the magnetic gasket and the annular magnet 150 are relatively fixed. The magnetic gasket is used to isolate the annular magnet 150 from its installation position on the measuring rod 141 to prevent magnetization at the installation position.

[0127] In one embodiment of the present utility model, the miniaturized displacement sensor 100 is mainly composed of four components or modules, specifically a housing 110, a sensitive component 120, a cable 130 and a magnetic ring (ring magnet 150). The miniaturized displacement sensor 100 is based on the principle of magnetostriction, with the housing 110 protecting the electrical part, the sensitive component 120 performing signal sensing and signal processing, the cable 130 providing internal power supply and transmitting position signals externally, and the magnetic ring providing a magnetic field that can be sensed by the sensitive component 120.

[0128] The housing 110 is provided with mounting threads 1112 for threaded connection with the client (pre-reserved hole of the oil cylinder). One end of the housing 110 is provided with a first structure 115 for installing or removing the sensor body; the other end of the housing 110 is provided with mounting threads 1112, and the thread diameter should be smaller than the outer diameter of the housing 110 minus twice the diameter of the O-ring (first seal 161).

[0129] The housing 110 is mainly composed of a wiring base 112 and an electronic compartment 111. The sensitive component 120 is a modular structure and is arranged in the housing 110 to facilitate production and assembly.

[0130] It should be noted that the connection between the wiring base 112 and the electronic compartment 111 is not limited to welding, and can also be a threaded connection.

[0131] It should be emphasized that the advantages of the miniaturized displacement sensor 100 of the utility model are: 1. Compact structure and small installation space requirement; 2. Non-contact measurement, long life, and easy maintenance; 3. Fully enclosed design, with a protection level of up to IP68 (a protection level); 4. Low power consumption design, which can meet the use requirements of the mining industry.

[0132] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0133] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0134] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0135] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A miniaturized displacement sensor, characterized in that: include: A housing, wherein a mounting cavity is provided inside the housing; A sensitive component is arranged in the installation cavity; An electric cable, one end of which can extend into the installation cavity and be electrically connected to the sensitive component; A measuring rod, fixedly connected to the housing; An annular magnet, movably disposed on the measuring rod; The housing comprises: An electronic compartment, wherein at least a portion of an outer wall of the electronic compartment is provided with a mounting thread, the electronic compartment having a first end and a second end arranged opposite to each other, the second end being used for fixed connection with the measuring rod; A wiring seat is provided at the first end, the wiring seat is sealed and connected to the electronic compartment, the wiring seat and the electronic compartment surround the installation cavity, one end of the cable is passed through the wiring seat and extends into the installation cavity, so that one end of the cable is electrically connected to the sensitive component; The housing is provided with a first structure which is convenient for installation and disassembly.

2. The miniaturized displacement sensor according to claim 1, characterized in that: The first structure is a boss structure and / or a groove structure.

3. The miniaturized displacement sensor according to claim 1, characterized in that: The electronic warehouse comprises: a first part, wherein one end of the first part is the first end; a second part, one end of the second part being connected to the other end of the first part, the other end of the second part being the second end, and the mounting thread being provided on an outer wall of the second part; Wherein, the first part and the second part are an integrated structure.

4. The miniaturized displacement sensor according to any one of claims 1 to 3, characterized in that: The outer wall of the electronic compartment is provided with a sealing groove, and the miniaturized displacement sensor further comprises: The first sealing member is sleeved on the electronic compartment, and at least a portion of the first sealing member is disposed in the sealing groove.

5. The miniaturized displacement sensor according to any one of claims 1 to 3, characterized in that: The wiring socket comprises: a third part, one end of the third part being sealedly connected to the first end; a fourth part, one end of which is connected to the other end of the third part, and the fourth part is provided with the first structure; Wherein, the third part and the fourth part are an integrated structure.

6. The miniaturized displacement sensor according to any one of claims 1 to 3, characterized in that: The second end is provided with a first mounting hole, the first mounting hole is communicated with the mounting cavity, and at least a portion of the measuring rod is disposed in the first mounting hole; The miniaturized displacement sensor further comprises: A magnetic induction element is disposed through the measuring rod, and one end of the magnetic induction element is electrically connected to the sensitive component.

7. The miniaturized displacement sensor according to any one of claims 1 to 3, characterized in that: The housing also includes: A wire nut is arranged at one end of the wiring seat away from the electronic compartment. The wire nut is sealed and connected to the wiring seat. One end of the cable is passed through the wire nut and the wiring seat and extends into the installation cavity.

8. The miniaturized displacement sensor according to claim 7, characterized in that: A second mounting hole is provided at one end of the wiring seat away from the electronic compartment, and at least a portion of the wire pressing nut is disposed in the second mounting hole.

9. The miniaturized displacement sensor according to claim 7, characterized in that: The wire pressing nut is provided with a third mounting hole, the third mounting hole is a truncated cone, the small end of the third mounting hole is away from the electronic compartment, and the cable is passed through the third mounting hole; The miniaturized displacement sensor further comprises: The second sealing member is sleeved on the cable, and the second sealing member is arranged in the third mounting hole.

10. The miniaturized displacement sensor according to any one of claims 1 to 3, characterized in that: The annular magnet comprises: An annular mounting frame is movably mounted on the measuring rod, and the annular mounting frame has a plurality of mounting grooves; A plurality of magnetic cores, each of the magnetic cores is arranged in a corresponding installation slot.

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