Displacement detection device and fork lift mast

Abstract

The application discloses a displacement detection device and a forklift mast, and belongs to the technical field of displacement detection. The displacement detection device comprises a pull rope displacement sensor, a monitoring device and a sensor body. The pull rope displacement sensor comprises a pull rope and a sensor body. The first end of the pull rope is connected with the sensor body, and the second end of the pull rope is used for being connected with a to-be-measured object. The monitoring device comprises a micro switch and a trigger part. The trigger part is connected with the trigger spring of the micro switch, and the trigger part is in abutment with the pull rope. In the technical scheme of the application, the integrated monitoring device and the pull rope displacement sensor can be used for monitoring the state of the pull rope in real time, and then the abnormal problems of the pull rope displacement sensor can be fed back in time, so that the risk of generating safety problems is reduced.

Description

Technical Field

[0001] This application belongs to the field of displacement detection technology, and in particular relates to a displacement detection device and a forklift mast. Background Technology

[0002] In related technologies, pull-cord sensors are mainly used to detect the running distance of the object under test. However, existing pull-cord sensors cannot monitor their own pull-cord situation. When the pull-cord is loose, the feedback value will be too large. When the pull-cord is stuck, it may break. Moreover, this status cannot be fed back in time, so there is room for improvement. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the related art. To this end, this application proposes a displacement detection device and a forklift mast that can promptly report abnormalities in the pull rope displacement sensor.

[0004] In a first aspect, this application provides a displacement detection device, comprising:

[0005] A pull-rope displacement sensor includes a pull rope and a sensor body, wherein a first end of the pull rope is connected to the sensor body, and a second end of the pull rope is used to connect to the object to be measured.

[0006] The monitoring device includes a micro switch and a trigger, wherein the trigger is connected to the trigger spring of the micro switch and abuts against the pull cord.

[0007] In the above technical solution, by integrating the monitoring device and the rope displacement sensor, the status of the rope can be monitored in real time, and any abnormalities in the rope displacement sensor can be promptly reported, reducing the risk of safety problems.

[0008] According to one embodiment of this application, the triggering part includes a rotatable guide wheel, which is rotatably mounted on the side of the trigger spring facing the pull rope.

[0009] In the above technical solution, the guide wheel is rotatably mounted on the side of the trigger spring facing the pull rope. When the guide wheel abuts against the pull rope radially, the friction between the guide wheel and the pull rope is rolling friction, which helps to reduce wear on the guide wheel and the pull rope. At the same time, the pull rope and the guide wheel are tangent at the contact position, and the rotation axis of the guide wheel is perpendicular to the extension direction of the pull rope. In addition, the guide wheel can simultaneously guide and reverse the pull rope and detect the status of the pull rope.

[0010] According to one embodiment of this application, the trigger spring is provided with a bracket, and the guide wheel is rotatably mounted on the bracket.

[0011] In the above technical solution, the guide wheel is rotatably mounted on the trigger spring via a bracket, which helps to reduce wear between the guide wheel and the pull rope.

[0012] According to one embodiment of this application, the trigger portion is mounted on the free end of the trigger spring.

[0013] In the above technical solution, the trigger part is installed at the free end of the trigger spring, which helps to reduce the force on the trigger spring at the trigger signal position and reduce the risk of micro switch failure.

[0014] According to one embodiment of this application, the trigger portion is provided with a groove, and at least a portion of the pull cord is located within the groove.

[0015] In the above technical solution, the groove helps reduce the risk of deviating from the motion trajectory due to the swing of the pull rope, and can also provide a guiding path when the pull rope turns.

[0016] According to one embodiment of this application, the pull rope extends in a straight line from a first end to a second end, the monitoring device is located on one side of the pull rope, and the triggering part abuts against the tensioned pull rope.

[0017] In the above technical solution, the measurement path between the rope displacement sensor and the object to be measured is a straight line.

[0018] According to one embodiment of this application, the pull cord extends from a first end to a position abutting the trigger portion along a first direction, and from the position abutting the trigger portion to a second end along a second direction, wherein the first direction and the second direction form an obtuse angle.

[0019] In the above technical solution, the measurement path between the pull rope displacement sensor and the object under test is a series of straight lines, and the triggering part can simultaneously guide the pull rope to change direction and detect the state of the pull rope.

[0020] According to one embodiment of this application, the monitoring device further includes a limiting member for abutting the side of the trigger spring away from the pull rope.

[0021] In the above technical solution, the limiting component can reduce the risk of deformation of the trigger spring due to metal fatigue.

[0022] According to one embodiment of this application, the micro switch further includes a switch body and an elastic element, the trigger spring is rotatably mounted on the switch body, and the elastic element is connected between the switch body and the trigger spring, and is located near the connection position between the trigger spring and the switch body.

[0023] Secondly, this application provides a forklift mast, comprising:

[0024] The displacement detection device as described in any one of the above statements.

[0025] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0026] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0027] Figure 1 This is one of the structural schematic diagrams of the displacement detection device provided in the embodiments of this application;

[0028] Figure 2 This is a second schematic diagram of the displacement detection device provided in the embodiments of this application;

[0029] Figure 3 This is a schematic diagram of the detection device provided in the embodiments of this application;

[0030] Figure 4 This is the third structural schematic diagram of the displacement detection device provided in the embodiments of this application.

[0031] Figure label:

[0032] Displacement detection device 1;

[0033] 10, 110, and 120 are a pull rope displacement sensor and a pull rope, respectively.

[0034] Monitoring device 20;

[0035] Micro switch 210, trigger spring 211, bracket 212, switch body 213, elastic element 214;

[0036] Trigger part 220, guide wheel 221, groove 222;

[0037] Limiting component 230; mounting plate 240

[0038] Test object 2;

[0039] First direction X, second direction Y. Detailed Implementation

[0040] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0041] This application aims to address at least one of the technical problems existing in the related art. To this end, this application proposes a displacement detection device and a forklift mast that can promptly report abnormalities in the pull rope displacement sensor.

[0042] The following is for reference. Figures 1-4 Describes a displacement detection device 1 according to an embodiment of this application.

[0043] like Figure 1 and Figure 2 As shown, Figure 1 This is one of the structural schematic diagrams of the displacement detection device 1 provided in the embodiments of this application. Figure 2 This is a second schematic diagram of the structure of the displacement detection device 1 provided in this application embodiment. The displacement detection device 1 includes:

[0044] The pull-rope displacement sensor 10 includes a pull-rope 110 and a sensor body 120. The first end of the pull-rope 110 is connected to the sensor body 120, and the second end of the pull-rope 110 is used to connect to the object to be measured 2.

[0045] The monitoring device 20 includes a micro switch 210 and a trigger part 220. The trigger part 220 is connected to the trigger spring 211 of the micro switch 210 and abuts against the pull rope 110.

[0046] In this embodiment, the displacement detection device 1 includes a pull-rope displacement sensor 10 and a monitoring device 20. The pull-rope displacement sensor 10 includes a pull rope 110 and a sensor body 120. The first end of the pull rope 110 is connected to the sensor body 120, and the second end of the pull rope 110 is used to connect to the object to be measured 2. The pull-rope displacement sensor 10 measures the distance between the object to be measured 2 and the sensor body 120 through the pull rope 110. The monitoring device 20 is used to monitor the working status of the pull-rope displacement sensor 10, and the monitoring device 20 is located between the sensor body 120 and the object to be measured 2 along the extension direction of the pull rope 110, and is spaced apart from both the sensor body 120 and the object to be measured 2.

[0047] The monitoring device 20 may include a micro switch 210 and a trigger 220. The trigger 220 is connected to the trigger spring 211 of the micro switch 210. When the pull rope 110 is working normally, the pull rope 110 is in a tensioned state and has circumferential tension. The trigger 220 abuts against the pull rope 110. The restoring force of the tension acts on the trigger 220, pushing the trigger 220 to move closer to the micro switch 210, thereby causing the micro switch 210 to output a trigger signal. At this time, the monitoring device 20 outputs a normal signal.

[0048] If an abnormality such as jamming occurs during the retraction of the pull rope 110, the pull rope 110 will break. The broken pull rope 110 is in a slack state, the trigger part 220 does not contact the pull rope 110, the pull rope 110 no longer applies force to the trigger part 220, the micro switch 210 does not output a trigger signal, and at this time the monitoring device 20 outputs an abnormal signal.

[0049] Among them, the trigger spring 211 is a sheet-like part that is elastic and can be bent or moved.

[0050] In related technologies, the pull rope 110 sensor is mainly used to detect the running distance of the object under test 2. However, the existing pull rope 110 sensor cannot monitor its own pull rope 110 situation. When the pull rope 110 is loose, the feedback value will be too large. When the rope is stuck, the pull rope 110 will break. Moreover, this state cannot be fed back in time, so there is room for improvement.

[0051] This application combines the monitoring device 20 with the pull rope displacement sensor 10, which can detect the status of the pull rope 110 in real time. When the pull rope 110 gets stuck and breaks during the pulling process, the micro switch 210 of the monitoring device 20 will stop outputting the trigger signal, and the monitoring device 20 will trigger an abnormal signal, thereby timely feedback on the abnormal problem of the pull rope displacement sensor 10 and reducing the risk of safety problems.

[0052] According to the displacement detection device 1 provided in the embodiments of this application, by integrating the monitoring device 20 and the pull rope displacement sensor 10, the state of the pull rope 110 can be monitored in real time, and abnormal problems of the pull rope displacement sensor 10 can be fed back in a timely manner, reducing the risk of safety problems.

[0053] In some embodiments, such as Figure 3 As shown, Figure 3 This is a schematic diagram of the monitoring device 20 provided in the embodiment of this application. The triggering part 220 includes a rotatable guide wheel 221, which is rotatably mounted on the side of the trigger spring 211 facing the pull rope 110.

[0054] In this embodiment, the guide wheel 221 is rotatably mounted on the side of the trigger spring 211 facing the pull rope 110. When the guide wheel 221 abuts against the pull rope 110 radially, the friction between the guide wheel 221 and the pull rope 110 is rolling friction, which helps to reduce the wear of the guide wheel 221 and the pull rope 110. At the same time, the pull rope 110 and the guide wheel 221 are tangent at the contact position, and the rotation axis of the guide wheel 221 is perpendicular to the extension direction of the pull rope 110.

[0055] Furthermore, the guide wheel 221 can simultaneously guide and change the direction of the pull rope 110 and detect the state of the pull rope 110. When the pull rope 110 turns after contacting the guide wheel 221, the extension direction of the portion between the first end of the pull rope 110 and the contact position remains unchanged, while the portion between the second end of the pull rope 110 and the contact position extends towards the guide wheel 221. In other words, the pull rope 110 is divided into two segments at the contact position with the guide wheel 221, with different extension directions and an obtuse angle between them.

[0056] In some embodiments, such as Figure 3 As shown, Figure 3 This is a schematic diagram of the monitoring device 20 provided in the embodiment of this application. The trigger spring 211 is provided with a bracket 212, and the guide wheel 221 is rotatably mounted on the bracket 212.

[0057] In this embodiment, the bracket 212 includes, but is not limited to, two support arms spaced apart along the extension direction of the rotation axis of the guide wheel 221, and a rotating shaft is connected between the two support arms. The guide wheel 221 is rotatably mounted on the bracket 212 via the rotating shaft.

[0058] In addition, the bracket 212 is located on the side of the trigger spring 211 facing the pull rope 110, that is, the guide wheel 221 is rotatably mounted on the side of the trigger spring 211 facing the pull rope 110. When the guide wheel 221 abuts against the pull rope 110 in the radial direction, the guide wheel 221, the bracket 212 and the trigger spring 211 rotate together in the direction closer to the micro switch 210, and the friction between the guide wheel 221 and the pull rope 110 is rolling friction, which helps to reduce the wear of the guide wheel 221 and the pull rope 110.

[0059] The guide wheel 221 can simultaneously guide and change the direction of the pull rope 110 and detect the status of the pull rope 110. When the pull rope 110 turns after contacting the guide wheel 221, the extension direction of the part between the first end of the pull rope 110 and the contact position remains unchanged, while the part between the second end of the pull rope 110 and the contact position extends towards the guide wheel 221.

[0060] In some embodiments, such as Figures 1-3 As shown, Figure 1 This is one of the structural schematic diagrams of the displacement detection device 1 provided in the embodiments of this application. Figure 2 This is the second schematic diagram of the displacement detection device 1 provided in the embodiments of this application. Figure 3 This is a schematic diagram of the monitoring device 20 provided in this embodiment. The trigger part 220 is mounted on the free end of the trigger spring 211.

[0061] In this embodiment, the micro switch 210 may include a switch body 213 and a trigger spring 211. One end of the trigger spring 211 is connected to the switch body 213, and the other end of the trigger spring 211 is provided with a trigger part 220. The trigger spring 211 can rotate around the connection position with the switch body 213. When the angle formed between the trigger spring 211 and the switch body 213 is the target value, the micro switch 210 does not output a trigger signal. When the angle formed between the trigger spring 211 and the switch body 213 is not the target value, the micro switch 210 outputs a trigger signal.

[0062] In addition, the free end of the trigger spring 211 is far away from the connection position between the trigger spring 211 and the switch body 213. When the trigger part 220 is subjected to the force from the pull rope 110, the trigger spring 211 can be regarded as a lever arm, which helps to reduce the force on the trigger spring 211 at the trigger signal position and reduce the risk of failure of the micro switch 210.

[0063] In some embodiments, such as Figure 3 As shown, Figure 3 This is a schematic diagram of the monitoring device 20 provided in the embodiments of this application. The trigger part 220 is provided with a groove 222, and at least a portion of the pull rope 110 is located in the groove 222.

[0064] In this embodiment, the trigger part 220 includes various structural forms. When the trigger part 220 is not rotatable, the groove 222 is located on the side of the trigger part 220 facing the pull rope 110. When the trigger part 220 can rotate, the groove 222 is located on the outside of the trigger part 220.

[0065] Taking the trigger part 220 including a rotatable guide wheel 221 as an example, the outer side of the guide wheel 221 has a groove 222 arranged around it. When the pull rope 110 abuts against the trigger part 220, at least a part of the pull rope 110 is located in the groove 222 and abuts against the bottom of the groove 222. The groove 222 helps to reduce the risk of deviating from the motion trajectory due to the swing of the pull rope 110, and can also provide a guide path when the pull rope 110 turns.

[0066] It should be noted that the trigger part 220 listed above, including the rotatable guide wheel 221, is only illustrative and not an exhaustive list of the present solution. Any modifications, equivalent substitutions, improvements or variations made within the spirit and principles of the present invention, as well as any other reasonable implementation mode, should be included within the protection scope of the present invention.

[0067] In some embodiments, such as Figure 1 and Figure 4 As shown, Figure 1 This is one of the structural schematic diagrams of the displacement detection device 1 provided in the embodiments of this application. Figure 4This is the third schematic diagram of the displacement detection device 1 provided in this application embodiment. The first end of the pull rope 110 is connected to the sensor body 120, and the second end of the pull rope 110 is connected to the object to be measured 2. There are various measurement paths between the pull rope displacement sensor 10 and the object to be measured 2, including but not limited to:

[0068] Example 1: The pull rope 110 extends in a straight line from the first end to the second end, the monitoring device 20 is located on one side of the pull rope 110, and the trigger part 220 abuts against the tensioned pull rope 110.

[0069] In this embodiment, such as Figure 1 As shown, Figure 1 This is one of the structural schematic diagrams of the displacement detection device 1 provided in the embodiments of this application. The measurement path between the pull rope displacement sensor 10 and the object to be measured 2 is a straight line. The pull rope 110 extends along a straight line from the first end to the second end. The monitoring device 20 is located on one side of the pull rope 110. The monitoring device 20 is spaced apart from the pull rope displacement sensor 10 and the object to be measured 2 along the extension direction of the pull rope 110, and the trigger part 220 abuts against the tensioned pull rope 110.

[0070] When the pull rope 110 is working normally, the pull rope 110 is in a taut state and has circumferential tension. The trigger part 220 abuts against the pull rope 110, and the micro switch 210 outputs a trigger signal. If an abnormality such as jamming occurs when the pull rope 110 is retracted, the pull rope 110 will disconnect. The disconnected pull rope 110 is in a slack state, the trigger part 220 does not abut against the pull rope 110, and the micro switch 210 does not output a trigger signal.

[0071] Example 2: The pull cord 110 extends from the first end to the position abutting the trigger part 220 along the first direction X, and from the position abutting the trigger part 220 to the second end along the second direction Y, with the first direction X and the second direction Y forming an obtuse angle.

[0072] In this embodiment, such as Figure 4 As shown, Figure 4 This is the third structural schematic diagram of the displacement detection device 1 provided in the embodiments of this application. The measurement path between the pull rope displacement sensor 10 and the object to be measured 2 consists of multiple straight lines. For example, in the case of limited environmental space, the measurement path between the pull rope 110 of the pull rope displacement sensor 10 and the object to be measured 2 cannot form a straight line.

[0073] The pull rope 110 extends from the first end to the position where it abuts against the trigger part 220 along the first direction X. The pull rope 110 extends from the position where it abuts against the trigger part 220 to the second end along the second direction Y. The monitoring device 20 is spaced apart from the pull rope displacement sensor 10 and the object to be measured 2 along the first direction X, and the trigger part 220 abuts against the tensioned pull rope 110.

[0074] In other words, the pull cord 110 turns after contacting the trigger part 220. The pull cord 110 is divided into two segments at the contact position with the trigger part 220. The two segments extend in different directions and form an obtuse angle.

[0075] When the pull rope 110 is working normally, the pull rope 110 is in a taut state and has circumferential tension. The trigger part 220 abuts against the pull rope 110, and the micro switch 210 outputs a trigger signal. If an abnormality such as jamming occurs when the pull rope 110 is retracted, the pull rope 110 will disconnect. The disconnected pull rope 110 is in a slack state, the trigger part 220 does not abut against the pull rope 110, and the micro switch 210 does not output a trigger signal.

[0076] The trigger unit 220 can simultaneously guide the reversal of the pull rope 110 and detect the state of the pull rope 110. When the pull rope 110 turns after contacting the trigger unit 220, the extension direction of the portion between the first end of the pull rope 110 and the contact position remains unchanged, while the portion between the second end of the pull rope 110 and the contact position extends towards the trigger unit 220. In other words, the pull rope 110 is divided into two segments at the contact position with the trigger unit 220, and the extension directions of the two segments are different, and the included angle is an obtuse angle.

[0077] It should be noted that the measurement path between the rope displacement sensor 10 and the object under test 2 listed above is only illustrative and not an exhaustive list of this solution. Any modifications, equivalent substitutions, improvements or variations made within the spirit and principles of this invention, as well as any other reasonable implementation mode, should be included within the protection scope of this invention.

[0078] In some embodiments, such as Figure 3 and Figure 4 As shown, Figure 3 This is a schematic diagram of the structure of the monitoring device 20 provided in the embodiments of this application. Figure 4 This is the third structural schematic diagram of the displacement detection device 1 provided in the embodiments of this application. The monitoring device 20 also includes a limiting member 230, which is used to abut against the side of the trigger spring 211 away from the pull rope 110.

[0079] In this embodiment, the monitoring device 20 may include a limiting member 230 and a mounting plate 240. The limiting member 230 and the micro switch 210 are both mounted on the mounting plate 240, and the limiting member 230 and the micro switch 210 are spaced apart along the extension direction of the pull rope 110 on the side of the mounting plate 240 near the pull rope 110.

[0080] When the pull cord 110 extends in a straight line from the first end to the second end, the extension direction of the trigger spring 211 is the same as the extension direction of the pull cord 110. At this time, the limiting member 230 does not function. When the pull cord 110 extends from the first end to the position abutting the trigger part 220 along the first direction X, and from the position abutting the trigger part 220 to the second end along the second direction Y, the trigger spring 211 rotates toward the switch body 213. When the trigger spring 211 rotates to extend along the first direction X under the action of the pull cord 110, the limiting member 230 can abut against the side of the trigger spring 211 away from the pull cord 110, preventing the trigger spring 211 from continuing to rotate, thereby reducing the risk of deformation of the trigger spring 211 due to metal fatigue.

[0081] In some embodiments, such as Figure 3 As shown, Figure 3 This is a schematic diagram of the structure of the monitoring device 20 provided in the embodiments of this application. The micro switch 210 also includes a switch body 213 and an elastic element 214. The trigger spring 211 is rotatably mounted on the switch body 213, and the elastic element 214 is connected between the switch body 213 and the trigger spring 211, and is close to the connection position between the trigger spring 211 and the switch body 213.

[0082] In this embodiment, the micro switch 210 may include a trigger spring 211, a switch body 213, and an elastic element 214. One end of the trigger spring 211 is mounted on the side of the switch body 213 facing the pull cord 110, and the trigger spring 211 can rotate around this end. The elastic element 214 is connected between the switch body 213 and the trigger spring 211, and is located near the connection position between the spring and the switch body 213.

[0083] When the trigger part 220 contacts the pull cord 110, the trigger spring 211 rotates toward the switch body 213 or away from the switch body 213, thereby compressing or stretching the elastic element 214. At this time, the micro switch 210 outputs a trigger signal.

[0084] Furthermore, the elastic force of the elastic element 214 can be adjusted according to the retraction force of the pull rope displacement sensor 10. At the same time, the free end of the trigger spring 211 is away from the connection position between the trigger spring 211 and the switch body 213, and the elastic element 214 is close to the connection position between the trigger spring 211 and the switch body 213. When the trigger part 220 is subjected to the force from the pull rope 110, the trigger spring 211 can be regarded as a lever arm, which helps to reduce the force on the elastic element 214 and reduce the risk of failure of the micro switch 210.

[0085] Furthermore, the trigger spring 211 is provided with a through hole, and the through hole is located between the connection position of the trigger spring 211 and the switch body 213 and the connection position of the trigger spring 211 and the elastic member 214. The shape of the through hole is not limited, and a more force-saving structure can be formed on the trigger spring 211, which helps to improve the sensitivity of the trigger spring 211.

[0086] In some embodiments, the monitoring device 20 has various structural forms, including but not limited to:

[0087] Example 1: The trigger spring 211 is located on the side of the switch body 213 facing the pull rope 110. When the elastic element 214 is in a compressed state, the micro switch 210 outputs a trigger signal.

[0088] like Figure 1 and Figure 3 As shown, Figure 1 This is one of the structural schematic diagrams of the displacement detection device 1 provided in the embodiments of this application. Figure 3 This is a schematic diagram of the monitoring device 20 provided in this embodiment. In this embodiment, the trigger spring 211 can be located on the side of the switch body 213 facing the pull rope 110. When the trigger part 220 contacts the pull rope 110, the trigger spring 211 rotates towards the switch body 213, thereby compressing the elastic member 214. At this time, the micro switch 210 outputs a trigger signal. When the trigger part 220 is not in contact with the pull rope 110, the trigger spring 211 resets, and the elastic member 214 is in a natural state. At this time, the micro switch 210 does not output a trigger signal.

[0089] Example 2: The trigger spring 211 is located on the side of the switch body 213 away from the pull rope 110. When the elastic element 214 is in a stretched state, the micro switch 210 outputs a trigger signal.

[0090] In this embodiment, the trigger spring 211 can be located on the side of the switch body 213 away from the pull rope 110. When the trigger part 220 contacts the pull rope 110, the trigger spring 211 rotates away from the switch body 213, thereby stretching the elastic element 214. At this time, the micro switch 210 outputs a trigger signal. When the trigger part 220 is not in contact with the pull rope 110, the trigger spring 211 resets, and the elastic element 214 is in a natural state. At this time, the micro switch 210 does not output a trigger signal.

[0091] It should be noted that the specific structure of the monitoring device 20 listed above is only illustrative and not an exhaustive list of this solution. Any modifications, equivalent substitutions, improvements or variations made within the spirit and principles of this invention, as well as any other reasonable implementation mode, should be included within the protection scope of this invention.

[0092] In some embodiments, the displacement detection device 1 may further include a controller configured to provide an abnormal signal when the micro switch 210 does not output a trigger signal.

[0093] In this embodiment, the controller is electrically connected to the rope displacement sensor 10 and the monitoring device 20. When the rope 110 is in a normal state, the micro switch 210 outputs a trigger signal, the controller feeds back a normal signal, and the displacement detection device 1 operates normally. When the rope 110 is in an abnormal state, the micro switch 210 does not output a trigger signal, the controller feeds back an abnormal signal, and the displacement detection device 1 stops operating.

[0094] Furthermore, during the operation of the pull rope displacement sensor 10, the vibration of the pull rope 110 may cause signal judgment errors, which can be detected by filtering out signals with excessively short durations.

[0095] Furthermore, the controller is configured to provide an abnormal signal when the duration from the output trigger signal to the signal change of the microswitch 210 exceeds a threshold.

[0096] This application embodiment also provides a forklift mast, including the above-mentioned displacement detection device 1.

[0097] In this embodiment, the displacement detection device 1 may include a pull rope displacement sensor 110 and a monitoring device 20. The pull rope displacement sensor 10 is physically connected, has good anti-interference ability and high installation flexibility, and is suitable for complex working conditions that require medium-to-long-distance, non-contact installation. For example, the pull rope displacement sensor 10 can be applied to equipment or forklift masts in harsh factory environments. In these environments, the error of the pull rope displacement sensor 10 is more controllable than that of laser detection, and more accurate measurement can be achieved.

[0098] In addition, the rope displacement sensor 10 mainly measures physical displacement by converting it into an electrical signal. Its core principle is that the rope 110 is pulled in and out to drive the internal encoder to rotate, thereby outputting a signal corresponding to the displacement.

[0099] For example, the material used to make the pull rope 110 includes, but is not limited to, stainless steel wire, and the internal encoder includes, but is not limited to, a potentiometer, a photoelectric encoder, or a magnetic encoder.

[0100] According to some embodiments of this application, such as Figures 1-4 As shown, Figure 1 This is one of the structural schematic diagrams of the displacement detection device 1 provided in the embodiments of this application. Figure 2 This is the second schematic diagram of the displacement detection device 1 provided in the embodiments of this application. Figure 3 This is a schematic diagram of the structure of the monitoring device 20 provided in the embodiments of this application. Figure 4This is the third structural schematic diagram of the displacement detection device 1 provided in this application embodiment. This application provides a displacement detection device 1, including: a pull-rope displacement sensor 10, comprising a pull rope 110 and a sensor body 120, with a first end of the pull rope 110 connected to the sensor body 120 and a second end of the pull rope 110 used to connect to the object 2 to be measured; and a monitoring device 20, comprising a micro switch 210 and a trigger part 220, the trigger part 220 being connected to a trigger spring 211 of the micro switch 210 and abutting against the pull rope 110. The trigger part 220 includes a rotatable guide wheel 221, which is rotatably mounted on the side of the trigger spring 211 facing the pull rope 110. The trigger spring 211 is provided with a bracket 212, and the guide wheel 221 is rotatably mounted on the bracket 212. The micro switch 210 also includes a switch body 213 and an elastic element 214. The trigger spring 211 is rotatably mounted on the switch body 213, and the elastic element 214 is connected between the switch body 213 and the trigger spring 211, and is close to the connection position between the spring and the switch body 213.

[0101] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0102] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0103] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0104] In the description of this application, "multiple" means two or more.

[0105] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0106] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0107] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0108] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A displacement detection device (1), characterized in that, include: A pull-rope displacement sensor (10) includes a pull rope (110) and a sensor body (120). The first end of the pull rope (110) is connected to the sensor body (120), and the second end of the pull rope (110) is used to connect to the object to be measured (2). The monitoring device (20) includes a micro switch (210) and a trigger (220), wherein the trigger (220) is connected to the trigger spring (211) of the micro switch (210) and the trigger (220) abuts against the pull rope (110).

2. The displacement detection device (1) according to claim 1, characterized in that, The triggering part (220) includes a rotatable guide wheel (221), which is rotatably mounted on the side of the trigger spring (211) facing the pull rope (110).

3. The displacement detection device (1) according to claim 2, characterized in that, The trigger spring (211) is provided with a bracket (212), and the guide wheel (221) is rotatably mounted on the bracket (212).

4. The displacement detection device (1) according to claim 1, characterized in that, The trigger part (220) is installed at the free end of the trigger spring (211).

5. The displacement detection device (1) according to claim 1, characterized in that, The trigger part (220) is provided with a groove (221), and at least a portion of the pull rope (110) is located in the groove (221).

6. The displacement detection device (1) according to claim 1, characterized in that, The pull rope (110) extends in a straight line from the first end to the second end, the monitoring device (20) is located on one side of the pull rope (110), and the trigger part (220) abuts against the tensioned pull rope (110).

7. The displacement detection device (1) according to claim 1, characterized in that, The pull cord (110) extends from the first end to the position abutting the trigger part (220) along a first direction (X), and from the position abutting the trigger part (220) to the second end along a second direction (Y), where the first direction (X) and the second direction (Y) form an obtuse angle.

8. The displacement detection device (1) according to claim 7, characterized in that, The monitoring device (20) also includes a limiting member (230) for abutting the side of the trigger spring (211) away from the pull rope (110).

9. The displacement detection device (1) according to any one of claims 1-8, characterized in that, The micro switch (210) also includes a switch body (213) and an elastic element (214). The trigger spring (211) is rotatably mounted on the switch body (213). The elastic element (214) is connected between the switch body (213) and the trigger spring (211) and is located near the connection position between the trigger spring (211) and the switch body (213).

10. A forklift mast, characterized in that, Includes the displacement detection device (1) as described in any one of claims 1-9.

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