Displacement sensor and detection equipment

Abstract

The utility model provides a displacement sensor and a detection device, and the displacement sensor comprises an installation seat; the winding part is rotatably connected to the mounting seat; the pull rope is wound around the winding part, one end of the pull rope is fixedly connected to the winding part, the other end of the pull rope is used for being connected with a to-be-detected object, and the pull rope drives the winding part to rotate relative to the mounting base; the gear motor is connected to the winding part and comprises an input shaft, the input shaft is connected to the winding part, and the winding part can drive the input shaft to rotate at a first rotating speed; the output shaft rotates at a second rotating speed under the condition that the input shaft rotates at the first rotating speed, and the second rotating speed is smaller than the first rotating speed; the speed measuring shaft is connected to the output shaft, the output shaft drives the speed measuring shaft to rotate at a second rotating speed, and a magnetic core is arranged at the end part of the speed measuring shaft; and the detection device is installed in the detection device installation cavity, the detection device and the magnetic core are oppositely arranged, and the detection device is used for detecting the rotating speed of the magnetic core.

Description

Technical Field

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

[0002] Related technology The drawstring sensor includes a base and a rotating shaft. A drawstring is wound around the rotating shaft. The drawstring can be connected to the object to be measured. When the object to be measured moves, the drawstring is stretched, and the drawstring drives the rotating shaft to rotate relative to the base. A magnetic core is provided on the rotating shaft, and a detector that cooperates with the magnetic core is provided on the base. The detector determines the moving speed and moving distance of the object to be measured by detecting the rotation speed of the magnetic core. However, when the object to be measured moves too fast, the rotation speed of the magnetic core is too fast, and the detector cannot accurately detect the rotation speed of the magnetic core. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art or related technology.

[0004] To this end, the first objective of the present utility model is to provide a displacement sensor.

[0005] The second purpose of the utility model is to provide a detection device.

[0006] To achieve at least one of the above purposes, according to a first aspect of the utility model, a displacement sensor is proposed, comprising: a mounting seat having a motor mounting cavity and a detection device mounting cavity; a winding portion rotatably connected to the mounting seat; a pull rope wound around the winding portion, one end of the pull rope being fixedly connected to the winding portion, and the other end of the pull rope being used to connect to the object to be measured, and when the pull rope is pulled by the object to be measured, the pull rope drives the winding portion to rotate relative to the mounting seat; a reduction motor connected to the winding portion, and the reduction motor portion is located in the motor mounting cavity, and the reduction motor comprises: an input shaft connected to the winding portion, and the winding portion can drive the input shaft to rotate at a first speed; an output shaft, when the input shaft rotates at the first speed, the output shaft rotates at a second speed, and the second speed is less than the first speed; a speed measuring shaft connected to the output shaft, when the input shaft rotates at the first speed, the output shaft drives the speed measuring shaft to rotate at the second speed, and a magnetic core is provided at the end of the speed measuring shaft; a detection device, installed in the detection device mounting cavity, the detection device is arranged opposite to the magnetic core, and the detection device is used to detect the speed of the magnetic core.

[0007] The present application proposes a displacement sensor, which is used to detect the moving distance or moving speed of an object to be measured. The displacement sensor includes a mounting seat, a winding portion and a pull rope, wherein the winding portion is rotatably connected to the mounting seat, and the pull rope is wound around the winding portion. Specifically, one end of the pull rope is fixedly connected to the winding portion, and the other end can be connected to the object to be measured. When the object to be measured moves relative to the displacement sensor, the object to be measured pulls the pull rope out of the winding portion, and the pull rope drives the winding portion to rotate relative to the mounting seat.

[0008] Furthermore, in order to detect the moving speed or moving distance of the object to be measured, the present application also sets a reduction motor, a speed measuring shaft and a detection device in the displacement sensor, the winding part can drive the speed measuring shaft to rotate through the reduction motor, and the detection device can detect the rotation speed of the speed measuring shaft, thereby realizing the detection of the moving speed or moving distance of the object to be measured. Specifically, the mounting seat has a motor mounting cavity and a detection device mounting cavity, wherein the motor mounting cavity is used to install the reduction motor and the speed measuring shaft, the reduction motor is at least partially located in the motor mounting cavity, and the detection device mounting cavity is used to install the detection device. The reduction motor includes an input shaft and an output shaft, wherein the input shaft is connected to the winding part, and when the pull rope pulls the winding part to rotate relative to the mounting seat, the winding part rotates at a first rotation speed, and the winding part drives the input shaft to rotate at a first rotation speed. The reduction motor has a deceleration effect, and when the input shaft rotates at a first rotation speed, the output shaft rotates at a second rotation speed, and the second rotation speed is less than the first rotation speed.

[0009] Furthermore, the output shaft is connected to the speed measuring shaft, specifically, the speed measuring shaft is connected to the output shaft through an elastic coupling. When the input shaft rotates at a first speed, the output shaft drives the speed measuring shaft to rotate at a second speed. A magnetic core is provided at one end of the output shaft away from the reduction motor, and the output shaft drives the magnetic core to rotate synchronously. The detection device is arranged relative to the magnetic core, and the detection device can detect the rotation speed of the magnetic core. In this way, the rotation speed of the input shaft of the reduction motor can be determined according to the rotation speed of the magnetic core, and then the rotation speed of the winding part can be determined. When the diameter of the pull rope wound on the winding part is known, the stretching speed and the stretching length of the pull rope can be determined, and then the moving speed and moving distance of the object to be measured can be determined, so as to realize the detection of the object to be measured. A sensor installation port is also provided on the mounting seat, and the sensor installation port is used for an external sensor, which can be electrically connected to the detection device and receive the detection result of the detection device.

[0010] Understandably, the rotation speed of the magnetic core is positively correlated with the moving speed of the object to be measured. If a reduction motor is not provided in the displacement sensor, the rotation speed of the magnetic core will increase. When the rotation speed of the magnetic core is too fast, the rotation speed of the magnetic core is likely to exceed the speed measurement range of the detection device, thereby causing inaccurate detection results. In order to avoid the above problems, the present application provides a reduction motor in the displacement sensor. By setting the rotation speed of the output shaft of the reduction motor to be less than the rotation speed of the input shaft, the rotation speed of the magnetic core can be reduced, so that the rotation speed of the magnetic core can be reduced to within the speed measurement range of the detection device, so as to improve the detection accuracy of the detection device, and then improve the detection accuracy of the displacement sensor.

[0011] According to the above displacement sensor of the utility model, it can also have the following distinguishing technical features:

[0012] In some technical schemes, optionally, the mounting seat includes: a base having a first mounting hole; a bearing seat connected to the base, a portion of the bearing seat being located in the first mounting hole, another portion of the bearing seat extending out of the base, the winding portion being rotatably connected to the bearing seat, and a motor mounting cavity being arranged in the bearing seat; a plurality of first bearings being sleeved on the bearing seat, the plurality of first bearings being arranged in sequence along the axial direction of the bearing seat, the winding portion having a second mounting hole, a portion of the bearing seat extending into the second mounting hole, and the first bearing being located between an outer wall of the bearing seat and a hole wall of the second mounting hole; a flange seat connected to the bearing seat, a detection device being installed on the flange seat, a portion of the speed measuring shaft extending into the flange seat, and the flange seat and the base defining a detection device mounting cavity; a plurality of second bearings being sleeved on the speed measuring shaft, the flange seat having a third mounting hole, a portion of the speed measuring shaft extending into the third mounting hole, a plurality of second bearings being arranged in sequence along the axial direction of the speed measuring shaft, and the second bearings being located between an outer wall of the speed measuring shaft and a hole wall of the third mounting hole.

[0013] In this technical solution, the structure of the mounting seat is defined. The mounting seat includes a base, a bearing seat and a flange seat, wherein the bearing seat is mounted on the base, and the flange seat is mounted on the bearing seat. Specifically, the base has a first mounting hole, a portion of the bearing seat is located in the first mounting hole, the other portion extends out of the base, and the winding portion is rotatably connected to the bearing seat. The bearing seat is a hollow structure, the motor mounting cavity is provided in the bearing seat, and the reduction motor is at least partially located in the motor mounting cavity of the bearing seat. The flange seat is connected to the bearing seat, and a portion of the speed measuring shaft extends into the flange seat in a direction away from the reduction motor. Both the flange seat and the base are hollow structures, and the inner walls of the flange seat and the base define a detection device mounting cavity, and the detection device is mounted on the flange seat. In a possible technical solution, the bearing seat is connected to the base by a first fixing bolt.

[0014] Furthermore, the base also includes a plurality of first bearings, the first bearings are sleeved on the bearing seat, the first bearings are located between the bearing seat and the winding part, and the winding part can be supported by the first bearings so that the winding part can rotate relative to the bearing seat. Specifically, the winding part has a second mounting hole, a part of the part of the bearing seat extending out of the base extends into the second mounting hole, and the first bearing is located between the outer wall of the bearing seat and the hole wall of the second mounting hole so that the winding part can be rotatably connected to the bearing seat. Furthermore, a plurality of first bearings are arranged in sequence along the axial direction of the bearing seat to enhance the stability of the connection between the winding part and the bearing seat. In a possible technical solution, the number of the first bearings is two, and the two first bearings are arranged in sequence along the axial direction of the bearing seat. Along the axial direction of the bearing seat, there is a boss between the two first bearings, and the two first bearings are symmetrically arranged relative to the radial center line of the boss.

[0015] Furthermore, the base also includes a plurality of second bearings, which are sleeved on the speed measuring shaft, and the second bearings are located between the speed measuring shaft and the flange seat. The speed measuring shaft can be supported by the second bearings, so that the speed measuring shaft can rotate relative to the flange seat. Specifically, the flange seat has a third mounting hole, a portion of the speed measuring shaft extends into the third mounting hole, and the second bearing is located between the outer wall of the speed measuring shaft and the hole wall of the third mounting hole, so that the speed measuring shaft can rotate relative to the flange seat. Furthermore, a plurality of second bearings are arranged in sequence along the axial direction of the speed measuring shaft to improve the stability of the rotation of the speed measuring shaft. In a possible technical solution, the number of second bearings is two, and the two second bearings are arranged in sequence along the axial direction of the speed measuring shaft. Along the axial direction of the speed measuring shaft, there is a boss between the two second bearings, and the two second bearings are symmetrically arranged relative to the radial center line of the boss.

[0016] In some technical schemes, optionally, the displacement sensor also includes: a first oil seal, which is sleeved on the speed measuring shaft, the first oil seal is located between the outer wall of the speed measuring shaft and the hole wall of the third mounting hole and is located at the end of the flange seat, and the first oil seal is used to seal the installation cavity of the detection device; a second oil seal, which is sleeved on the bearing seat, the second oil seal is located at the end of the winding part, and the second oil seal is used to seal the second mounting hole.

[0017] In this technical solution, the structure of the displacement sensor is further defined. The displacement sensor also includes a first oil seal, which is used to protect the magnetic core and the detection device to prevent impurities such as engine oil from contaminating the magnetic core and the detection device. Specifically, the first oil seal is sleeved on the speed measuring shaft, the first oil seal is located between the outer wall of the speed measuring shaft and the hole wall of the third mounting hole, and the first oil seal is arranged at the end of the flange seat. In this way, the first oil seal can prevent the engine oil or other impurities in the motor mounting cavity from entering the detection device mounting cavity, and prevent the oil from contaminating the detection device and the magnetic core, so that the first oil seal plays the role of sealing the detection device mounting cavity.

[0018] Furthermore, the displacement sensor also includes a second oil seal, which is used to protect the structure inside the winding part to prevent external impurities and liquids from entering the winding part. Specifically, the second oil seal is sleeved on the bearing seat, the second oil seal is located between the outer wall of the bearing seat and the hole wall of the second mounting hole, and the second oil seal is arranged at the end of the winding part. In this way, the second oil seal can prevent external impurities and liquids from entering the interior of the winding part, and protect the components inside the winding part, so that the second oil seal plays the role of sealing the second mounting hole.

[0019] In some technical schemes, optionally, the displacement sensor also includes: a first seal, which is arranged between the detection device and the wall of the flange seat, and the first seal divides the installation cavity of the detection device into a sealing cavity and a potting cavity; wherein the detection device has a detection chip, the detection chip is arranged relative to the magnetic core to detect the rotation speed of the magnetic core, the detection chip is located in the sealing cavity, the sealing cavity and the potting cavity are separated from each other, and the potting cavity is filled with sealant.

[0020] In this technical solution, the structure of the displacement sensor is further defined. The displacement sensor also includes a first seal, which is used to separate the detection device installation cavity into a sealing cavity and a potting cavity to protect the magnetic core in the sealing cavity and the detection chip of the detection device. Specifically, the first seal is provided between the detection device and the wall surface of the flange seat, and the first seal separates the detection device installation cavity into a sealing cavity and a potting cavity, and the sealing cavity and the potting cavity are independent of each other.

[0021] Furthermore, the detection device has a detection chip, which is arranged opposite to the magnetic core, and the detection chip is used to detect the rotation speed of the magnetic core. The magnetic core and the detection chip are located in a sealed cavity, and the potting cavity is filled with potting glue, that is, the first seal separates the magnetic core and the detection chip from the potting glue to prevent the potting glue from contaminating the magnetic core and the detection chip and affecting the detection accuracy of the detection device. Moreover, by filling the potting glue in the potting cavity, on the one hand, the detection device can be fixed by the potting glue, the vibration of the detection device can be reduced, and the detection accuracy of the detection device can be improved. On the other hand, the potting glue can also play a sealing role to prevent external impurities from affecting the detection device, and play a certain protective role on the detection device.

[0022] In some technical schemes, optionally, the winding part includes: a main body, the draw rope is wound around the main body, and the main body has a draw rope fixing groove; an upper cover, fixedly connected to the main body; a draw rope fixing pin, one end of the draw rope is located in the draw rope fixing groove, the draw rope fixing pin passes through the upper cover and extends into the draw rope fixing groove, and fixes the end of the draw rope to the draw rope fixing groove; a transmission stop block, the upper cover has a stop block mounting groove, the transmission stop block is located in the stop block mounting groove, and the transmission stop block is fixedly connected to the upper cover and the input shaft.

[0023] In this technical solution, the structure of the winding part is defined. The winding part includes a main body and an upper cover, wherein the draw cord is wound around the main body, and the upper cover is fixedly connected to the main body. In order to fix the draw cord, the present application provides a draw cord fixing groove on the main body, and also provides a draw cord fixing pin in the winding part. Specifically, one end of the draw cord is located in the draw cord fixing groove, the draw cord fixing pin passes through the upper cover and extends into the draw cord fixing groove, and the draw cord fixing pin presses the end of the draw cord into the draw cord fixing groove so that one end of the draw cord is fixedly connected to the main body. In a possible technical solution, the upper cover is connected to the main body by a second fixing bolt.

[0024] Furthermore, the winding part also includes a transmission block, which is used to transmit the rotation of the winding part to the input shaft of the reduction motor. Specifically, the upper cover has a block installation groove, the transmission block is located in the block installation groove, the transmission block is fixedly connected to the upper cover and the input shaft of the reduction motor, and when the upper cover rotates with the main body, the upper cover drives the transmission block to rotate, and the transmission block drives the input shaft of the reduction motor to rotate. In a possible technical solution, the transmission block is fixedly connected to the upper cover and the input shaft of the reduction motor by a fastening screw.

[0025] In some technical schemes, optionally, the displacement sensor also includes: a coil spring, the main body has a coil spring installation cavity, the coil spring is installed in the coil spring installation cavity, a part of the bearing seat extends into the coil spring installation cavity, the two ends of the coil spring are respectively connected to the bearing seat and the main body, when the pull rope is stretched by the object to be measured, the pull rope pulls the main body to rotate, the coil spring is deformed, and the coil spring generates a pulling force on the main body opposite to the rotation direction of the main body.

[0026] In this technical solution, the structure of the displacement sensor is further defined. The displacement sensor also includes a coil spring, which is used to automatically reset the winding part. The main body has a coil spring installation cavity, and the coil spring is installed in the coil spring installation cavity. The two ends of the coil spring are respectively connected to the bearing seat and the main body. When the main body is pulled by the pull rope to rotate relative to the bearing seat, the coil spring is deformed. At this time, the coil spring generates a pulling force on the main body, and the pulling force can pull the winding part to automatically reset. Specifically, a part of the bearing seat extends into the coil spring cavity, one end of the coil spring is connected to the bearing seat, and the other end is connected to the main body through a pin. When the pull rope is connected to the object to be measured and the object to be measured moves in a direction away from the winding part, the object to be measured stretches the pull rope, and the pull rope pulls the main body to rotate relative to the bearing seat. At this time, the coil spring is deformed, the coil spring is tightened, and the coil spring generates a pulling force on the main body in the opposite direction of the rotation of the main body. When the object to be measured moves toward the winding part, the main body rotates in the opposite direction under the tension of the coil spring, the coil spring expands, and the pull rope is wound around the winding part under the force of the coil spring. The winding part can be automatically reset without manual operation by the user, thereby improving user convenience.

[0027] In some technical solutions, optionally, the displacement sensor also includes: a coil spring upper cover plate installed in the coil spring installation cavity, the coil spring upper cover plate is located at the top of the coil spring; a coil spring bottom plate, installed in the coil spring installation cavity, the coil spring bottom plate is located at the bottom of the coil spring.

[0028] In this technical solution, the structure of the displacement sensor is further defined. In order to limit and protect the coil spring, the present application sets a coil spring upper cover plate and a coil spring bottom plate in the coil spring installation cavity. Among them, the coil spring upper cover plate is located at the top of the coil spring, and the coil spring bottom plate is located at the bottom of the coil spring. When the coil spring is deformed by the main body, the coil spring upper cover plate and the coil spring bottom plate can limit the coil spring to prevent the coil spring from deflecting. The coil spring upper cover plate and the coil spring bottom plate are made of materials with good wear resistance to extend the service life.

[0029] In some technical solutions, optionally, the displacement sensor further includes: a plurality of second seals, which are respectively arranged between the main body and the upper cover and between the hole wall of the first mounting hole and the outer wall of the bearing seat.

[0030] In this technical solution, the structure of the displacement sensor is further defined. The displacement sensor also includes a plurality of second seals, which are used to further seal the winding portion and the mounting seat. Specifically, at least one of the plurality of second seals is disposed between the main body and the upper cover, so that the coil spring mounting cavity of the winding portion can be sealed by the second seal to prevent external impurities and liquids from entering the coil spring mounting cavity through the gap between the upper cover and the main body, so as to protect the coil spring.

[0031] Furthermore, at least one of the multiple second seals is arranged between the hole wall of the first mounting hole and the outer wall of the bearing seat. In this way, the detection device installation cavity can be sealed by the second seal to prevent external impurities or liquids from entering the detection device installation cavity through the gap between the base and the bearing seat, so as to protect the detection device and the magnetic core.

[0032] In some technical solutions, optionally, the displacement sensor further includes: a connector, which is disposed on the mounting seat, the connector is electrically connected to the detection device, and the connector is used to be connected to a power source.

[0033] In the technical solution, the structure of the displacement sensor is further defined. The displacement sensor also includes a connector, and the connector is used to power the detection device. Specifically, the connector is electrically connected to the detection device, and the connector can be connected to an external power supply to power the detection device. Among them, the connector can be a waterproof connector or an aviation connector.

[0034] The second aspect of the utility model further provides a detection device, comprising the displacement sensor provided in the first aspect of the utility model.

[0035] The detection device provided in the second aspect of the utility model includes the displacement sensor proposed in the first aspect of the utility model, and therefore has all the beneficial effects of the displacement sensor.

[0036] Additional aspects and advantages of the present invention will become apparent in the following description or will be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0038] Figure 1 One of the structural schematic diagrams of a displacement sensor according to an embodiment of the utility model is shown;

[0039] Figure 2 A second structural schematic diagram of a displacement sensor according to an embodiment of the utility model is shown;

[0040] Figure 3 Shows Figure 2 Cross-sectional view of section FF.

[0041] in, Figures 1 to 3 The corresponding relationship between the reference numerals and the component names is as follows:

[0042] 100 displacement sensor, 110 mounting seat, 111 motor mounting cavity, 112 detection device mounting cavity, 113 base, 114 bearing seat, 115 flange seat, 116 first bearing, 117 second bearing, 118 third mounting hole, 119 second oil seal, 120 winding part, 121 second mounting hole, 122 main body, 123 rope fixing groove, 124 upper cover, 125 rope fixing pin, 126 transmission stopper, 127 stopper mounting groove, 128 second sealing member, 130 rope, 140 reduction motor, 141 Input shaft, 142 output shaft, 150 speed measuring shaft, 151 magnetic core, 152 elastic coupling, 153 first oil seal, 160 detection device, 161 detection chip, 170 first seal, 171 sealing chamber, 172 potting chamber, 180 coil spring, 181 coil spring installation chamber, 182 coil spring upper cover plate, 183 coil spring bottom plate, 190 connector, 191 sensor installation port, 192 first fixing bolt, 193 second fixing bolt, 194 shaft clamp, 195 bearing seat cutout, 196 coil spring pin, 197 countersunk screw. DETAILED DESCRIPTION

[0043] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is 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 application and the features in the embodiments can be combined with each other without conflict.

[0044] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, 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.

[0045] Refer to the following Figures 1 to 3 The following describes a displacement sensor 100 and a detection device provided according to some embodiments of the present invention.

[0046] In one embodiment according to the present application, Figure 1 and Figure 2 As shown, the utility model proposes a displacement sensor 100, including: a mounting seat 110, having a motor mounting cavity 111 and a detection device mounting cavity 112; a winding portion 120, rotatably connected to the mounting seat 110; a pull rope 130, wound around the winding portion 120, one end of the pull rope 130 is fixedly connected to the winding portion 120, and the other end of the pull rope 130 is used to connect with the object to be measured. When the pull rope 130 is pulled by the object to be measured, the pull rope 130 drives the winding portion 120 to rotate relative to the mounting seat 110; a reduction motor 140, connected to the winding portion 120, and a portion of the reduction motor 140 is located in the motor mounting cavity 111, and the reduction motor 140 includes: an input shaft 1 41, connected to the winding part 120, the winding part 120 can drive the input shaft 141 to rotate at a first speed; the output shaft 142, when the input shaft 141 rotates at the first speed, the output shaft 142 rotates at a second speed, and the second speed is less than the first speed; the speed measuring shaft 150, connected to the output shaft 142, when the input shaft 141 rotates at the first speed, the output shaft 142 drives the speed measuring shaft 150 to rotate at the second speed, and a magnetic core 151 is provided at the end of the speed measuring shaft 150; the detection device 160, installed in the detection device installation cavity 112, the detection device 160 and the magnetic core 151 are arranged opposite to each other, and the detection device 160 is used to detect the speed of the magnetic core 151.

[0047] The present application proposes a displacement sensor 100, which is used to detect the moving distance or moving speed of an object to be measured. The displacement sensor 100 includes a mounting seat 110, a winding portion 120 and a pull rope 130, wherein the winding portion 120 is rotatably connected to the mounting seat 110, and the pull rope 130 is wound around the winding portion 120. Specifically, one end of the pull rope 130 is fixedly connected to the winding portion 120, and the other end can be connected to the object to be measured. When the object to be measured moves relative to the displacement sensor 100, the object to be measured pulls the pull rope 130 out of the winding portion 120, and the pull rope 130 drives the winding portion 120 to rotate relative to the mounting seat 110.

[0048] Furthermore, in order to detect the moving speed or moving distance of the object to be measured, the present application further provides a reduction motor 140, a speed measuring shaft 150 and a detection device 160 in the displacement sensor 100. The winding portion 120 can drive the speed measuring shaft 150 to rotate through the reduction motor 140, and the detection device 160 can detect the rotation speed of the speed measuring shaft 150, thereby realizing the detection of the moving speed or moving distance of the object to be measured. Specifically, the mounting seat 110 has a motor mounting cavity 111 and a detection device mounting cavity 112, wherein the motor mounting cavity 111 is used to install the reduction motor 140 and the speed measuring shaft 150, the reduction motor 140 is at least partially located in the motor mounting cavity 111, and the detection device mounting cavity 112 is used to install the detection device 160. The reduction motor 140 includes an input shaft 141 and an output shaft 142, wherein the input shaft 141 is connected to the winding portion 120. When the pull rope 130 pulls the winding portion 120 to rotate relative to the mounting seat 110, the winding portion 120 rotates at a first speed, and the winding portion 120 drives the input shaft 141 to rotate at the first speed. The reduction motor 140 has a reduction effect. When the input shaft 141 rotates at the first speed, the output shaft 142 rotates at a second speed, which is less than the first speed.

[0049] Further, the output shaft 142 is connected to the speed measuring shaft 150, specifically, the speed measuring shaft 150 is connected to the output shaft 142 through an elastic coupling 152. When the input shaft 141 rotates at a first speed, the output shaft 142 drives the speed measuring shaft 150 to rotate at a second speed. A magnetic core 151 is provided at one end of the output shaft 142 away from the reduction motor 140, and the output shaft 142 drives the magnetic core 151 to rotate synchronously. The detection device 160 is arranged opposite to the magnetic core 151, and the detection device 160 can detect the speed of the magnetic core 151. In this way, the speed of the input shaft 141 of the reduction motor 140 can be determined according to the speed of the magnetic core 151, and then the speed of the winding part 120 can be determined. When the diameter of the pull rope 130 wound on the winding part 120 is known, the stretching speed and the stretching length of the pull rope 130 can be determined, and then the moving speed and moving distance of the object to be measured can be determined, so as to realize the detection of the object to be measured. The mounting base 110 is also provided with a sensor mounting port 191 , which is used for connecting an external sensor. The sensor can be electrically connected to the detection device 160 and receive the detection result of the detection device 160 .

[0050] Understandably, the rotation speed of the magnetic core 151 is positively correlated with the moving speed of the object to be measured. If the reduction motor 140 is not provided in the displacement sensor 100, the rotation speed of the magnetic core 151 will increase. In the case where the rotation speed of the magnetic core 151 is too fast, the rotation speed of the magnetic core 151 is likely to exceed the speed measurement range of the detection device 160, thereby causing inaccurate detection results. In order to avoid the above problems, the present application provides a reduction motor 140 in the displacement sensor 100. By setting the rotation speed of the output shaft 142 of the reduction motor 140 to be less than the rotation speed of the input shaft 141, the rotation speed of the magnetic core 151 can be reduced, so that the rotation speed of the magnetic core 151 can be reduced to within the speed measurement range of the detection device 160, so as to improve the detection accuracy of the detection device 160, and then improve the detection accuracy of the displacement sensor 100.

[0051] In some embodiments, optionally, Figure 1 and Figure 2As shown, the mounting seat 110 includes: a base 113 having a first mounting hole; a bearing seat 114 connected to the base 113, a portion of the bearing seat 114 is located in the first mounting hole, and another portion of the bearing seat 114 extends out of the base 113, the winding portion 120 is rotatably connected to the bearing seat 114, and the motor mounting cavity 111 is disposed in the bearing seat 114; a plurality of first bearings 116 are sleeved on the bearing seat 114, and the plurality of first bearings 116 are sequentially arranged along the axial direction of the bearing seat 114, the winding portion 120 has a second mounting hole 121, a portion of the bearing seat 114 extends into the second mounting hole 121, and the first bearing 116 is located in the bearing seat 11 4 and the hole wall of the second mounting hole 121; a flange seat 115 is connected to the bearing seat 114, the detection device 160 is installed on the flange seat 115, a part of the speed measuring shaft 150 extends into the flange seat 115, and the flange seat 115 and the base 113 define a detection device installation cavity 112; a plurality of second bearings 117 are sleeved on the speed measuring shaft 150, the flange seat 115 has a third mounting hole 118, a part of the speed measuring shaft 150 extends into the third mounting hole 118, and the plurality of second bearings 117 are sequentially arranged along the axial direction of the speed measuring shaft 150, and the second bearings 117 are located between the outer wall of the speed measuring shaft 150 and the hole wall of the third mounting hole 118.

[0052] In this embodiment, the structure of the mounting seat 110 is defined. The mounting seat 110 includes a base 113, a bearing seat 114 and a flange seat 115, wherein the bearing seat 114 is mounted on the base 113, and the flange seat 115 is mounted on the bearing seat 114. Specifically, the base 113 has a first mounting hole, a portion of the bearing seat 114 is located in the first mounting hole, and the other portion extends out of the base 113, and the winding portion 120 is rotatably connected to the bearing seat 114. The bearing seat 114 is a hollow structure, the motor mounting cavity 111 is provided in the bearing seat 114, and the reduction motor 140 is at least partially located in the motor mounting cavity 111 of the bearing seat 114. The flange seat 115 is connected to the bearing seat 114, and a portion of the speed measuring shaft 150 extends into the flange seat 115 in a direction away from the reduction motor 140. The flange seat 115 and the base 113 are both hollow structures, and the inner walls of the flange seat 115 and the base 113 define a detection device installation cavity 112, and the detection device 160 is installed on the flange seat 115. In a possible embodiment, the bearing seat 114 is connected to the base 113 by a first fixing bolt 192.

[0053] Further, the base 113 also includes a plurality of first bearings 116, the first bearings 116 are sleeved on the bearing seat 114, the first bearings 116 are located between the bearing seat 114 and the winding portion 120, and the winding portion 120 can be supported by the first bearings 116 so that the winding portion 120 can rotate relative to the bearing seat 114. Specifically, the winding portion 120 has a second mounting hole 121, a portion of the portion of the bearing seat 114 extending out of the base 113 extends into the second mounting hole 121, and the first bearings 116 are located between the outer wall of the bearing seat 114 and the hole wall of the second mounting hole 121 so that the winding portion 120 can be rotatably connected to the bearing seat 114. Further, as Figure 2 As shown, a plurality of first bearings 116 are sequentially arranged along the axial direction of the bearing seat 114 to improve the stability of the connection between the winding portion 120 and the bearing seat 114. In a possible embodiment, the number of the first bearings 116 is two, and the two first bearings 116 are sequentially arranged along the axial direction of the bearing seat 114. Along the axial direction of the bearing seat 114, there is a boss between the two first bearings 116, and the two first bearings 116 are symmetrically arranged relative to the radial center line of the boss.

[0054] Further, the base 113 further includes a plurality of second bearings 117, which are sleeved on the speed measuring shaft 150 and are located between the speed measuring shaft 150 and the flange seat 115. The speed measuring shaft 150 can be supported by the second bearings 117 so that the speed measuring shaft 150 can rotate relative to the flange seat 115. Specifically, the flange seat 115 has a third mounting hole 118, a portion of the speed measuring shaft 150 extends into the third mounting hole 118, and the second bearings 117 are located between the outer wall of the speed measuring shaft 150 and the hole wall of the third mounting hole 118 so that the speed measuring shaft 150 can rotate relative to the flange seat 115. Further, the plurality of second bearings 117 are sequentially arranged along the axial direction of the speed measuring shaft 150 to improve the stability of the rotation of the speed measuring shaft 150. In a possible embodiment, the number of second bearings 117 is two, and the two second bearings 117 are arranged in sequence along the axial direction of the speed measuring shaft 150. Along the axial direction of the speed measuring shaft 150, there is a boss between the two second bearings 117, and the two second bearings 117 are symmetrically arranged relative to the radial center line of the boss.

[0055] In some embodiments, optionally, Figure 1 and Figure 2 As shown, the displacement sensor 100 also includes: a first oil seal 153, which is sleeved on the speed measuring shaft 150, the first oil seal 153 is located between the outer wall of the speed measuring shaft 150 and the hole wall of the third mounting hole 118 and is located at the end of the flange seat 115, and the first oil seal 153 is used to seal the detection device installation cavity 112; a second oil seal 119, which is sleeved on the bearing seat 114, the second oil seal 119 is located at the end of the winding part 120, and the second oil seal 119 is used to seal the second mounting hole 121.

[0056] In this embodiment, the structure of the displacement sensor 100 is further defined. The displacement sensor 100 also includes a first oil seal 153, which is used to protect the magnetic core 151 and the detection device 160 to prevent impurities such as engine oil from contaminating the magnetic core 151 and the detection device 160. Specifically, the first oil seal 153 is sleeved on the speed measuring shaft 150, the first oil seal 153 is located between the outer wall of the speed measuring shaft 150 and the hole wall of the third mounting hole 118, and the first oil seal 153 is arranged at the end of the flange seat 115. In this way, the first oil seal 153 can prevent the engine oil or other impurities in the motor mounting cavity 111 from entering the detection device mounting cavity 112, and prevent the oil from contaminating the detection device 160 and the magnetic core 151, so that the first oil seal 153 plays the role of sealing the detection device mounting cavity 112.

[0057] Furthermore, the displacement sensor 100 further includes a second oil seal 119, which is used to protect the internal structure of the winding part 120 to prevent external impurities and liquid from entering the winding part 120. Specifically, the second oil seal 119 is sleeved on the bearing seat 114, the second oil seal 119 is located between the outer wall of the bearing seat 114 and the hole wall of the second mounting hole 121, and the second oil seal 119 is arranged at the end of the winding part 120. In this way, the second oil seal 119 can prevent external impurities and liquids from entering the interior of the winding part 120, and protect the components inside the winding part 120, so that the second oil seal 119 plays the role of sealing the second mounting hole 121.

[0058] In some embodiments, optionally, Figure 1 and Figure 2 As shown, the displacement sensor 100 also includes: a first sealing member 170, which is arranged between the detection device 160 and the wall of the flange seat 115, and the first sealing member 170 divides the detection device installation cavity 112 into a sealing cavity 171 and a potting cavity 172; wherein, the detection device 160 has a detection chip 161, and the detection chip 161 is arranged relative to the magnetic core 151 to detect the rotation speed of the magnetic core 151, and the detection chip 161 is located in the sealing cavity 171, and the sealing cavity 171 and the potting cavity 172 are separated from each other, and the potting cavity 172 is filled with sealant.

[0059] In this embodiment, the structure of the displacement sensor 100 is further defined. The displacement sensor 100 further includes a first seal 170, which is used to separate the detection device installation cavity 112 into a sealing cavity 171 and a potting cavity 172, so as to protect the magnetic core 151 in the sealing cavity 171 and the detection chip 161 of the detection device 160. Specifically, the first seal 170 is disposed between the detection device 160 and the wall surface of the flange seat 115, and the first seal 170 separates the detection device installation cavity 112 into a sealing cavity 171 and a potting cavity 172, and the sealing cavity 171 and the potting cavity 172 are independent of each other.

[0060] Furthermore, the detection device 160 has a detection chip 161, which is arranged opposite to the magnetic core 151, and the detection chip 161 is used to detect the rotation speed of the magnetic core 151. The magnetic core 151 and the detection chip 161 are located in a sealed cavity 171, and the potting cavity 172 is filled with potting glue, that is, the first sealing member 170 separates the magnetic core 151 and the detection chip 161 from the potting glue, so as to prevent the potting glue from contaminating the magnetic core 151 and the detection chip 161 and affecting the detection accuracy of the detection device 160. In addition, by filling the potting glue in the potting cavity 172, on the one hand, the detection device 160 can be fixed by the potting glue, the vibration of the detection device 160 can be reduced, and the detection accuracy of the detection device 160 can be improved. On the other hand, the potting glue can also play a sealing role, so as to prevent external impurities from affecting the detection device 160, and play a certain protective role for the detection device 160.

[0061] In some embodiments, optionally, Figure 1 and Figure 2 As shown, the winding portion 120 includes: a main body 122, a pull rope 130 is wound around the main body 122, and the main body 122 has a pull rope fixing groove 123; an upper cover 124, fixedly connected to the main body 122; a pull rope fixing pin 125, one end of the pull rope 130 is located in the pull rope fixing groove 123, the pull rope fixing pin 125 passes through the upper cover 124 and extends into the pull rope fixing groove 123, and fixes the end of the pull rope 130 to the pull rope fixing groove 123; a transmission stop block 126, the upper cover 124 has a stop block mounting groove 127, the transmission stop block 126 is located in the stop block mounting groove 127, and the transmission stop block 126 is fixedly connected to the upper cover 124 and the input shaft 141.

[0062] In this embodiment, the structure of the winding part 120 is defined. The winding part 120 includes a main body 122 and an upper cover 124, wherein the pull rope 130 is wound around the main body 122, and the upper cover 124 is fixedly connected to the main body 122. In order to fix the pull rope 130, the present application provides a pull rope fixing groove 123 on the main body 122, and also provides a pull rope fixing pin 125 in the winding part 120. Specifically, one end of the pull rope 130 is located in the pull rope fixing groove 123, the pull rope fixing pin 125 passes through the upper cover 124 and extends into the pull rope fixing groove 123, and the pull rope fixing pin 125 presses the end of the pull rope 130 into the pull rope fixing groove 123, so that one end of the pull rope 130 is fixedly connected to the main body 122. In a possible embodiment, the upper cover 124 is connected to the main body 122 by a second fixing bolt 193.

[0063] Furthermore, the winding portion 120 further includes a transmission block 126, which is used to transmit the rotation of the winding portion 120 to the input shaft 141 of the reduction motor 140. Specifically, the upper cover 124 has a block mounting groove 127, and the transmission block 126 is located in the block mounting groove 127. The transmission block 126 is fixedly connected to the upper cover 124 and the input shaft 141 of the reduction motor 140. When the upper cover 124 rotates with the main body 122, the upper cover 124 drives the transmission block 126 to rotate, and the transmission block 126 drives the input shaft 141 of the reduction motor 140 to rotate. In a possible embodiment, the transmission block 126 is fixedly connected to the upper cover 124 and the input shaft 141 of the reduction motor 140 by fastening screws.

[0064] In some embodiments, optionally, Figure 1 and Figure 2 As shown, the displacement sensor 100 also includes: a coil spring 180, the main body 122 has a coil spring installation cavity 181, the coil spring 180 is installed in the coil spring installation cavity 181, a part of the bearing seat 114 extends into the coil spring installation cavity 181, and the two ends of the coil spring 180 are respectively connected to the bearing seat 114 and the main body 122. When the pull rope 130 is stretched by the object to be measured, the pull rope 130 pulls the main body 122 to rotate, and the coil spring 180 is deformed. The coil spring 180 generates a pulling force on the main body 122 that is opposite to the rotation direction of the main body 122.

[0065] In this embodiment, the structure of the displacement sensor 100 is further defined. The displacement sensor 100 also includes a coil spring 180, which is used to automatically reset the winding portion 120. The main body 122 has a coil spring installation cavity 181, and the coil spring 180 is installed in the coil spring installation cavity 181. The two ends of the coil spring 180 are respectively connected to the bearing seat 114 and the main body 122. When the main body 122 is pulled by the pull rope 130 to rotate relative to the bearing seat 114, the coil spring 180 is deformed. At this time, the coil spring 180 generates a pulling force on the main body 122, and the pulling force can pull the winding portion 120 to automatically reset. Specifically, a part of the bearing seat 114 extends into the coil spring cavity, one end of the coil spring 180 is connected to the bearing seat 114, and the other end is connected to the main body 122 through the coil spring pin 196. When the pull rope 130 is connected to the object to be measured and the object to be measured moves in a direction away from the winding part 120, the object to be measured stretches the pull rope 130, and the pull rope 130 pulls the main body 122 to rotate relative to the bearing seat 114. At this time, the coil spring 180 is deformed, the coil spring 180 is tightened, and the coil spring 180 generates a pulling force on the main body 122 that is opposite to the rotation direction of the main body 122. When the object to be measured moves toward the winding part 120, the main body 122 rotates in the opposite direction under the action of the pulling force of the coil spring 180, the coil spring 180 relaxes, and the pull rope 130 is wound around the winding part 120 under the action of the force of the coil spring 180, and the winding part 120 can be automatically reset, and the winding part 120 can be automatically reset without manual operation by the user, thereby improving the user's convenience.

[0066] In some embodiments, optionally, Figure 2 As shown, the displacement sensor 100 also includes: a coil spring upper cover plate 182 installed in the coil spring installation cavity 181, and the coil spring upper cover plate 182 is located at the top of the coil spring 180; a coil spring bottom plate 183 installed in the coil spring installation cavity 181, and the coil spring bottom plate 183 is located at the bottom of the coil spring 180.

[0067] In this embodiment, the structure of the displacement sensor 100 is further defined. In order to limit and protect the coil spring 180, the present application sets a coil spring upper cover plate 182 and a coil spring bottom plate 183 in the coil spring installation cavity 181. Among them, the coil spring upper cover plate 182 is located at the top of the coil spring 180, and the coil spring bottom plate 183 is located at the bottom of the coil spring 180. When the coil spring 180 is deformed by the main body 122, the coil spring upper cover plate 182 and the coil spring bottom plate 183 can limit the coil spring 180 to prevent the coil spring 180 from deflecting. The coil spring upper cover plate 182 and the coil spring bottom plate 183 are both made of materials with good wear resistance to extend the service life.

[0068] In some embodiments, optionally, Figure 2As shown, the displacement sensor 100 further includes: a plurality of second seals 128 , which are respectively disposed between the main body 122 and the upper cover 124 and between the hole wall of the first mounting hole and the outer wall of the bearing seat 114 .

[0069] In this embodiment, the structure of the displacement sensor 100 is further defined. The displacement sensor 100 also includes a plurality of second seals 128, which are used to further seal the winding portion 120 and the mounting seat 110. Specifically, at least one of the plurality of second seals 128 is disposed between the main body 122 and the upper cover 124, so that the coil spring installation cavity 181 of the winding portion 120 can be sealed by the second seal 128 to prevent foreign impurities and liquids from entering the coil spring installation cavity 181 through the gap between the upper cover 124 and the main body 122, so as to protect the coil spring 180.

[0070] Furthermore, at least one of the multiple second seals 128 is disposed between the hole wall of the first mounting hole and the outer wall of the bearing seat 114. In this way, the detection device mounting cavity 112 can be sealed by the second seal 128 to prevent external impurities or liquids from entering the detection device mounting cavity 112 through the gap between the base 113 and the bearing seat 114, so as to protect the detection device 160 and the magnetic core 151.

[0071] In some embodiments, optionally, Figure 1 and Figure 2 As shown, the displacement sensor 100 further includes: a connector 190, which is disposed on the mounting seat 110, and the connector 190 is electrically connected to the detection device 160, and the connector 190 is used to be connected to a power source.

[0072] In this embodiment, the structure of the displacement sensor 100 is further defined. The displacement sensor 100 further includes a connector 190, and the connector 190 is used to power the detection device 160. Specifically, the connector 190 is electrically connected to the detection device 160, and the connector 190 can be connected to an external power source to power the detection device 160. The connector 190 can be a waterproof connector or an aviation connector 190.

[0073] The second aspect of the present invention further provides a detection device, comprising the displacement sensor 100 provided in the first aspect of the present invention.

[0074] The detection device provided in the second aspect of the present invention comprises the displacement sensor 100 provided in the first aspect of the present invention, and therefore has all the beneficial effects of the displacement sensor 100.

[0075] like Figure 1 and Figure 2As shown, in a possible embodiment, the waterproof connector (i.e., connector 190) is used to power the sensor (i.e., displacement sensor 100) and output the detection position signal. The waterproof connector can be replaced with an aviation connector to power the sensor and output the detection position signal. The reducer (i.e., reduction motor 140) and the main shaft (i.e., speed measuring shaft 150) are connected by an elastic coupling 152. A radial magnetic core (i.e., magnetic core 151) is installed at the end of the main shaft, and the radial magnetic core is directly opposite to the detection chip 161 on the circuit board (i.e., detection device 160), and the circuit board converts the detected data into an electrical signal for output. The flange seat 115 and the main shaft rely on a small bearing (i.e., second bearing 117) to achieve relative rotation. The flange seat 115 and the main shaft rely on a small oil seal (i.e., first oil seal 153) to achieve sealing between the two and protect the internal circuit board. There is a circuit board sealing ring (i.e., first seal 170) between the circuit board and the flange seat 115 to prevent the glue from flowing into the small bearing and other components during glue filling, affecting their rotation accuracy and life. A bearing seat 114 is installed between the electronic compartment (i.e., the base 113) and the flange seat 115, and the bearing seat 114 plays the role of supporting the transmission structure such as the coil spring 180 compartment (i.e., the main body 122) and the reduction motor 140. The electronics and the bearing seat 114 are assembled by the electronic compartment fixing bolts (i.e., the first fixing bolts 192). The bearing seat sealing ring (i.e., the second sealing member 128) realizes the sealing between the electronic compartment and the bearing seat 114. The coil spring compartment (i.e., the main body 122) and the bearing seat 114 rely on the large bearing (i.e., the first bearing 116) to achieve relative movement between the two. The coil spring compartment and the bearing seat 114 rely on the large oil seal (i.e., the second oil seal 119) to achieve the sealing between the coil spring compartment and the bearing seat 114, protecting the internal structural parts such as the coil spring 180 and the reduction motor 140. The coil spring bin seal ring (i.e., the second seal 128) realizes the seal between the coil spring bin and the coil spring bin cover (i.e., the upper cover 124), protecting the coil spring 180 and the internal structural parts such as the reduction motor 140. The shaft clamp 194 is clamped to the bearing seat 114, and the shaft clamp 194 is used to prevent the axial movement of the large bearing. The coil spring cover plate (i.e., the coil spring upper cover plate 182) and the coil spring bottom plate 183 are made of special materials to prevent the coil spring 180 from being damaged during the expansion and contraction process. Figure 3As shown, one end of the coil spring 180 is embedded in the bearing seat cutout 195, and the other end is fixed by the coil spring pin 196. The two ends of the coil spring pin 196 are respectively fixed on the coil spring bin and the coil spring bin cover. The countersunk screw 197 is used to connect the reduction motor 140 and the reducer cover. The rotating block (i.e., the transmission block 126) plays the function of transmitting rotation. The locking screw at the head end of the wire rope (i.e., the pull rope fixing pin 125) fixes the high-strength wire rope (i.e., the pull rope 130) to the wire rope clamping groove (i.e., the pull rope fixing groove 123) to fix the head end of the high-strength wire rope. The end of the high-strength wire rope is fixed on a movable object to be tested. There are two large bearings, which are symmetrically installed to improve the bearing capacity and stability of the bearings and make the transmission more stable. There are two small bearings, which are symmetrically installed to improve the bearing capacity and stability of the bearings and make the transmission more stable. There are two sensor reserved installation holes (i.e., sensor installation ports 191) on each of the three sides of the electronic warehouse to facilitate sensor installation. The rotating block is embedded in the U-shaped groove (i.e., the block installation groove 127) to realize the positioning of the rotating block. A set screw is installed on the side of the rotating block to fix the reduction motor shaft (i.e., the input shaft 141).

[0076] In the present invention, the term "plurality" means two or more than two, unless otherwise clearly defined. The terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, "connect" 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.

[0077] 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.

[0078] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A displacement sensor, characterized in that: include: A mounting seat having a motor mounting cavity and a detection device mounting cavity; A winding portion rotatably connected to the mounting seat; A pull rope is wound around the winding part, one end of the pull rope is fixedly connected to the winding part, and the other end of the pull rope is used to connect with the object to be measured. When the pull rope is pulled by the object to be measured, the pull rope drives the winding part to rotate relative to the mounting seat; A reduction motor is connected to the winding part, the reduction motor part is located in the motor installation cavity, and the reduction motor includes: An input shaft connected to the winding portion, wherein the winding portion can drive the input shaft to rotate at a first speed; an output shaft, wherein when the input shaft rotates at the first speed, the output shaft rotates at a second speed, the second speed being lower than the first speed; a speed measuring shaft connected to the output shaft, wherein when the input shaft rotates at the first speed, the output shaft drives the speed measuring shaft to rotate at the second speed, and a magnetic core is provided at an end of the speed measuring shaft; A detection device is installed in the detection device installation cavity, the detection device is arranged opposite to the magnetic core, and the detection device is used to detect the rotation speed of the magnetic core.

2. The displacement sensor according to claim 1, characterized in that: The mounting base comprises: A base having a first mounting hole; A bearing seat connected to the base, a portion of the bearing seat is located in the first mounting hole, another portion of the bearing seat extends out of the base, the winding portion is rotatably connected to the bearing seat, and the motor mounting cavity is provided in the bearing seat; A plurality of first bearings are sleeved on the bearing seat, the plurality of first bearings are sequentially arranged along the axial direction of the bearing seat, the winding portion has a second mounting hole, a portion of the bearing seat extends into the second mounting hole, and the first bearings are located between the outer wall of the bearing seat and the hole wall of the second mounting hole; A flange seat connected to the bearing seat, the detection device is installed on the flange seat, a portion of the speed measuring shaft extends into the flange seat, and the flange seat and the base define a mounting cavity for the detection device; A plurality of second bearings are sleeved on the speed measuring shaft, the flange seat has a third mounting hole, a portion of the speed measuring shaft extends into the third mounting hole, and a plurality of second bearings are arranged in sequence along the axial direction of the speed measuring shaft, and the second bearings are located between the outer wall of the speed measuring shaft and the hole wall of the third mounting hole.

3. The displacement sensor according to claim 2, characterized in that: Also includes: a first oil seal, sleeved on the speed measuring shaft, the first oil seal being located between the outer wall of the speed measuring shaft and the hole wall of the third mounting hole and at the end of the flange seat, the first oil seal being used to seal the detection device mounting cavity; The second oil seal is sleeved on the bearing seat, the second oil seal is located at the end of the winding part, and the second oil seal is used to seal the second mounting hole.

4. The displacement sensor according to claim 2, characterized in that: Also includes: A first sealing member is provided between the detection device and the wall surface of the flange seat, and the first sealing member divides the detection device installation cavity into a sealing cavity and a potting cavity; Wherein, the detection device has a detection chip, the detection chip is arranged opposite to the magnetic core to detect the rotation speed of the magnetic core, the detection chip is located in the sealed cavity, the sealed cavity and the potting cavity are separated from each other, and the potting cavity is filled with sealant.

5. The displacement sensor according to claim 2, characterized in that: The winding portion comprises: A main body, the drawstring is wound around the main body, and the main body has a drawstring fixing groove; An upper cover, fixedly connected to the main body; A drawstring fixing pin, one end of the drawstring is located in the drawstring fixing groove, the drawstring fixing pin passes through the upper cover and extends into the drawstring fixing groove, and fixes the end of the drawstring to the drawstring fixing groove; A transmission block, wherein the upper cover has a block mounting groove, the transmission block is located in the block mounting groove, and the transmission block is fixedly connected to the upper cover and the input shaft.

6. The displacement sensor according to claim 5, characterized in that: Also includes: The main body has a coil spring installation cavity, the coil spring is installed in the coil spring installation cavity, a part of the bearing seat extends into the coil spring installation cavity, and the two ends of the coil spring are respectively connected to the bearing seat and the main body. When the pull rope is stretched by the object to be measured, the pull rope pulls the main body to rotate, the coil spring is deformed, and the coil spring generates a pulling force on the main body opposite to the rotation direction of the main body.

7. The displacement sensor according to claim 6, characterized in that: Also includes: A coil spring upper cover plate is installed in the coil spring installation cavity, and the coil spring upper cover plate is located on the top of the coil spring; The coil spring bottom plate is installed in the coil spring installation cavity, and the coil spring bottom plate is located at the bottom of the coil spring.

8. The displacement sensor according to claim 5, characterized in that: Also includes: A plurality of second sealing members are respectively arranged between the main body and the upper cover and between the hole wall of the first mounting hole and the outer wall of the bearing seat.

9. The displacement sensor according to any one of claims 1 to 8, characterized in that: Also includes: A connector is arranged on the mounting seat, the connector is electrically connected to the detection device, and the connector is used to be connected to a power source.

10. A detection device, characterized in that: include: A displacement sensor as claimed in any one of claims 1 to 9.

Images