Limiting device and operation equipment with moving part

Abstract

The utility model relates to the technical field of limiting devices, and provides a limiting device and operation equipment with a moving part, and the limiting device comprises a protection part which is internally provided with a protection space; the movable part is movably arranged on the protection part; the non-contact limit switch is positioned in the protection space; the triggering piece is located in the protection space, and the triggering piece and the non-contact limiting switch are oppositely arranged in a spaced mode; the triggering piece is used for triggering the non-contact limiting switch in a non-contact manner; wherein one of the trigger piece and the non-contact limit switch is connected to the movable piece, and the other one of the trigger piece and the non-contact limit switch is connected to the protective piece; the movable part can move relative to the protection part so as to drive one of the trigger part and the non-contact limit switch to move towards or away from the other one of the trigger part and the non-contact limit switch. According to the limiting device, the influence of the external environment on the non-contact limiting switch and the triggering piece can be effectively reduced, the possibility that the limiting device is damaged is reduced, and the service life of the limiting device is prolonged.

Description

Technical Field

[0001] This application relates to the technical field of limiting devices, and in particular, to a limiting device and a working device with a moving component. Background Art

[0002] A limiting device is a device used to limit the movement or action of a moving component, and can be applied to a working device with a moving component. For example, it can be applied to various working devices with moving components such as aerial work platforms and elevators. When the lifting component of an aerial work platform or elevator is rising, if the limiting device touches an obstacle, the lifting component of the aerial work platform or elevator can be restricted from rising further, avoiding damage to the lifting component of the aerial work platform or elevator and the personnel or equipment thereon.

[0003] In some cases, the limiting device is easily affected by the external environment, resulting in damage to the limiting device and affecting its service life. For example, during the operation of the limiting device with a working device having a moving component, it is easily affected by external forces, such as being hit by an obstacle, resulting in damage to the limiting device; or for another example, the limiting device works under long-term fatigue, resulting in its easy failure and affecting the operation safety of the working device. Utility Model Content

[0004] The embodiments of this application provide a limiting device and a working device with a moving component, which can improve the technical problem that the limiting device is easily affected by the external environment, resulting in damage to the limiting device and affecting its service life.

[0005] In a first aspect, the embodiments of this application provide a limiting device, which includes:

[0006] A protective member, with a protective space provided inside the protective member;

[0007] A movable member, which is movably arranged on the protective member;

[0008] A non-contact limit switch, which is located inside the protective space; and

[0009] A triggering member, which is located inside the protective space, and the triggering member is opposite to and spaced apart from the non-contact limit switch; the triggering member is used to non-contact trigger the non-contact limit switch;

[0010] Wherein, one of the trigger member and the non-contact limit switch is connected to the movable member, and the other of the trigger member and the non-contact limit switch is connected to the protective member; the movable member can move relative to the protective member to drive one of the trigger member and the non-contact limit switch to move towards or away from the other of the trigger member and the non-contact limit switch.

[0011] The above technical solutions in the embodiments of the present application have at least the following technical effects or advantages:

[0012] The limit device provided by the embodiment of the present application is provided with a protective member having a protective space inside. The non-contact limit switch and the trigger member are both located in the protective space of the protective member. The protective member can protect the non-contact limit switch and the trigger member, effectively reducing the influence of the external environment on the non-contact limit switch and the trigger member, reducing the possibility of damage to the limit device, and thus being beneficial to improving the service life of the limit device.

[0013] Moreover, the trigger member and the non-contact limit switch are arranged opposite to each other and at intervals, and one of the trigger member and the non-contact limit switch is connected to the movable member, and the other is connected to the protective member. When the movable member is affected by an external force and moves relative to the protective member to drive one of the trigger member and the non-contact limit switch to move towards or away from the other, non-contact triggering of the non-contact limit switch by the trigger member can be realized, that is, the two can be triggered without direct contact. Compared with a mechanical travel switch that needs to be directly contacted with an object to be triggered (with insufficient anti-fatigue performance, and the contact points are prone to aging, oxidation, and corrosion, resulting in failure), the failure risk can be effectively reduced, which is thus beneficial to further improving the service life of the limit device.

[0014] In some embodiments, the non-contact limit switch is a magnetic limit switch, and the trigger member includes a magnet.

[0015] In some embodiments, the non-contact limit switch is a proximity switch.

[0016] In some embodiments, the non-contact limit switch is a wireless non-contact limit switch.

[0017] In some embodiments, the protective member is provided with a window portion for the non-contact limit switch to emit a signal.

[0018] In some embodiments, the limit device further includes an alarm component, the alarm component is arranged in the protective space, and the alarm component is electrically connected to the non-contact limit switch.

[0019] In some embodiments, the alarm component includes a sound alarm and a light alarm. The sound alarm and the light alarm are disposed within the protection space, and both the sound alarm and the light alarm are electrically connected to the non-contact limit switch.

[0020] In some embodiments, an exposure window is provided on the protection member for the light emitted by the light alarm to be exposed outside the protection member; the position of the light alarm corresponds to the position of the exposure window.

[0021] In some embodiments, all of the non-contact limit switches are located within the protection space, and / or all of the trigger members are located within the protection space.

[0022] In some embodiments, the movable member is movably disposed on the protection member along a first direction, and the non-contact limit switch is located on one side of the movable member in a second direction, and the second direction forms an angle with the first direction.

[0023] In some embodiments, a first opening and a second opening are respectively formed at opposite ends of the protection member. Both the first opening and the second opening are in communication with the protection space, and the movable member movably passes through the first opening, the protection space, and the second opening.

[0024] In some embodiments, the limiting device further includes a connecting member. The connecting member is connected to the side wall of the movable member, and at least a part of the connecting member is located within the protection space; the trigger member or the non-contact limit switch is connected to the connecting member to be connected to the movable member through the connecting member.

[0025] In some embodiments, the connecting member is entirely located within the protection space.

[0026] In some embodiments, the connecting member includes a first connecting portion and a second connecting portion. The first connecting portion and the second connecting portion are bent and connected; the first connecting portion is connected to the side wall of the movable member, and the trigger member or the non-contact limit switch is connected to the second connecting portion.

[0027] In some embodiments, the limit device also includes a support member, which is located in the protective space and connected to the protective member, and the support member and the connecting member are located on the same side of the movable member; the end of the support member facing one end of the connecting member is spaced apart from the end wall of the first end of the protective space, and the connecting member is at least partially located between the end of the support member facing one end of the connecting member and the end wall of the first end of the protective space; one of the trigger member and the non-contact limit switch is connected to the connecting member, and the other is connected to the support member; the trigger member or the non-contact limit switch connected to the support member is located on the side of the support member facing away from the movable member.

[0028] In some embodiments, the limit device also includes a placement member, which is located in the protective space and connected to the support member; the placement member has a placement space, and the non-contact limit switch is arranged in the placement space; the trigger member is connected to the connecting member.

[0029] In some embodiments, the movable member is provided with a mounting portion for mounting a resistance member, and the resistance member is used to resist external objects.

[0030] In some embodiments, the mounting portion includes an mounting space for mounting the interference member and an mounting opening connected to the mounting space for placing the interference member into the mounting space.

[0031] In some embodiments, a mounting hole is provided on the side wall of the movable part, and the mounting hole is connected to the mounting space; the limiting device also includes a fixing part, which is adjustably inserted into the mounting hole and is used to fix the interference part located in the mounting space.

[0032] In some embodiments, the limiting device also includes a matching piece, which is fixed to the side wall of the movable piece; a threaded through hole is provided on the matching piece, and the threaded through hole is connected to the mounting through hole; and the fixing piece is threadedly connected to the threaded through hole.

[0033] In some embodiments, the installation space is extended along the moving direction of the movable part.

[0034] In some embodiments, the limit device also includes an elastic member, which is connected to the movable member and the protective member, and is used to provide a force that causes the movable member to drive one of the trigger member and the non-contact limit switch to move away from the other of the trigger member and the non-contact limit switch.

[0035] In some embodiments, the elastic member is a spring; the spring is located in the protective space and is sleeved on the movable member.

[0036] In some embodiments, the protective member includes:

[0037] A top plate and a bottom plate, the top plate and the bottom plate being opposite and spaced apart;

[0038] A first side plate and a second side plate, the first side plate and the second side plate being opposite and spaced apart, the first side plate being connected to the same side of the top plate and the bottom plate, and the second side plate being connected to the same other side of the top plate and the bottom plate;

[0039] A first end plate and a second end plate, the first end plate and the second end plate being opposite and spaced apart, the first end plate being connected to the same end of the top plate and the bottom plate, and the second end plate being connected to the same other end of the top plate and the bottom plate;

[0040] Wherein, the top plate, the bottom plate, the first side plate, the second side plate, the first end plate and the second end plate enclose to form the protection space; the movable member is movably arranged on the top plate and / or the bottom plate.

[0041] In some embodiments, the first end plate is detachably connected to at least one of the top plate, the bottom plate, the first side plate and the second side plate.

[0042] In some embodiments, a first extension is convexly provided on a side of the first side plate away from the first end plate, a second extension is convexly provided on a side of the second side plate away from the first end plate, the second extension and the first extension being opposite and spaced apart; at least one first connection hole is provided on the first extension, and at least one second connection hole is provided on the second extension.

[0043] In a second aspect, an operating device with a moving part provided by an embodiment of the present application includes:

[0044] An operating device, the operating device including a movable moving part; and

[0045] The limiting device according to any one of the above embodiments, the limiting device being arranged on the moving part.

[0046] It can be understood that the beneficial effects of the above second aspect can be referred to the relevant descriptions in the above first aspect, and will not be elaborated here. Description of the Drawings

[0047] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or related technologies. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0048] Figure 1 Structural schematic diagram of the limiting device provided by some embodiments of the present application;

[0049] Figure 2 For Figure 1 Cross-sectional structural schematic diagram in the E-E direction in ;

[0050] Figure 3 For Figure 1 Structural schematic diagram of another perspective of the limiting device shown;

[0051] Figure 4 For Figure 1 Structural schematic diagram of the cooperation between the limiting device and the abutting member shown;

[0052] Figure 5 For Figure 1 One of the exploded structural schematic diagrams of the limiting device shown;

[0053] Figure 6 For Figure 1 Another exploded structural schematic diagram of the limiting device shown.

[0054] Among them, the reference numerals in the figure:

[0055] 100, limiting device; 200, abutting member;

[0056] 10, protective member; 101, protective space; 102, first opening; 103, second opening; 1001, window portion; 1002, exposed window; 1011, first end; 11, top plate; 12, bottom plate; 13, first side plate; 14, second side plate; 15, first end plate; 16, second end plate; 131, first extension; 141, second extension; 1310, first connection hole; 1410, second connection hole;

[0057] 20, movable member; 201, installation space; 202, installation opening; 203, installation through hole;

[0058] 30, non-contact limit switch;

[0059] 40, trigger member;

[0060] 50, connecting member; 51, first connecting portion; 52, second connecting portion;

[0061] 61. Support member; 62. Mounting member; 601. Mounting space;

[0062] 71. Fixing member; 72. Fitting member; 701. Threaded through hole;

[0063] 80. Elastic member;

[0064] 90. Alarm assembly; 91. Sound alarm; 92. Light alarm. Detailed implementation mode

[0065] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where 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 drawings are exemplary and are intended to explain the present application, and should not be construed as limiting the present application.

[0066] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0067] In the description of the embodiments of this application, the orientation or positional relationship indicated by the terms "inside", "outside", "above", "below", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application.

[0068] The terms "first", "second", "third", "fourth", "fifth", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. For example, the first through hole and the second through hole are only for distinguishing different through holes, and do not limit their sequence and quantity. The first through hole can also be named the second through hole, and the second through hole can also be named the first through hole, without departing from the scope of the described embodiments. And the terms "first", "second", etc. do not limit that the indicated features must be different.

[0069] In the description of the embodiments of the present application, unless otherwise clearly defined and limited, terms such as "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. The meaning of "a plurality of" is at least two, that is, two or more; the meaning of "a plurality of strips" is at least two, that is, two or more.

[0070] In the present application, "and / or" is merely an association relationship describing associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0071] It should be noted that in the present application, words such as "in some embodiments", "exemplarily", and "for example" are used to give examples, illustrations, or explanations. Any embodiment or design solution described as "in some embodiments", "exemplarily", or "for example" in the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly speaking, using words such as "in some embodiments", "exemplarily", and "for example" is intended to present relevant concepts in a specific manner, meaning that the specific features, structures, or characteristics described in combination with the embodiments can be included in at least one embodiment of the present application. The appearance of the above words at various positions in the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0072] In order to make the purpose, technical solutions, and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0073] The limiting device is a device used to limit the movement or motion of a moving component and can be applied to a working device having a moving component. For example, it can be applied to various working devices with moving components such as aerial work platforms and elevators. When the lifting component of an aerial work platform or elevator is rising, if the limiting device touches an obstacle, it can limit the continued rise of the lifting component of the aerial work platform or elevator, avoiding damage to the lifting component of the aerial work platform or elevator and the personnel or equipment thereon.

[0074] In some cases, the limit device is vulnerable to the external environment, resulting in damage to the limit device and affecting its service life. For example, during the operation of the limit device with a working device having moving parts, it is vulnerable to external forces, such as being hit by an obstacle, resulting in damage to the limit device; for another example, the limit device works under long-term fatigue (the limit switch of the limit device uses a contact mechanical travel switch, which is prone to failure due to factors such as aging, oxidation, and corrosion under long-term use and in a working environment with high acidity, alkalinity, and humidity), resulting in its easy failure and affecting the operation safety of the working device.

[0075] Based on this, in order to improve the technical problem that the limit device is vulnerable to the external environment, resulting in damage to the limit device and affecting its service life, the inventor proposed the following solution.

[0076] An embodiment of the present application provides a limit device 100, which can be applied to a working device with moving parts and is used to limit the movement or motion of the moving parts. It is particularly applicable to various working devices with moving parts, such as aerial work platforms, elevators, etc. For example, the aerial work platform can be a scissor aerial work platform, a trailer aerial work platform, a boom aerial work platform, a straight-arm aerial work platform, an aluminum alloy aerial work platform, a telescopic cylinder aerial work platform, a spider aerial work, etc., but not limited thereto. It should be noted that the application scope of the limit device 100 is not limited thereto, and it can also be applied to other various devices or objects that need to limit the movement of objects, such as robotic arms, pneumatic devices, moving tracks, robots, etc.

[0077] Please refer to Figures 1 to 3 and Figure 5 , the limit device 100 includes a protective member 10, a movable member 20, a non-contact limit switch 30, and a trigger member 40. A protective space 101 is provided inside the protective member 10. The movable member 20 is movably arranged on the protective member 10. The non-contact limit switch 30 is located in the protective space 101. The trigger member 40 is located in the protective space 101, and the trigger member 40 is opposite to and spaced from the non-contact limit switch 30; the trigger member 40 is used to non-contact trigger the non-contact limit switch 30.

[0078] Among them, one of the trigger member 40 and the non-contact limit switch 30 is connected to the movable member 20, and the other of the trigger member 40 and the non-contact limit switch 30 is connected to the protective member 10. The movable member 20 can move relative to the protective member 10 to drive one of the trigger member 40 and the non-contact limit switch 30 to move toward or away from the other of the trigger member 40 and the non-contact limit switch 30. It can be understood that the trigger member 40 can be connected to the movable member 20 and the non-contact limit switch 30 can be connected to the protective member 10. In this case, the movable member 20 can drive the trigger member 40 to move relative to the non-contact limit switch 30, Figure 2 and Figure 5 this case is exemplarily shown in Figure 2 ; alternatively, the non-contact limit switch 30 can be connected to the movable member 20 and the trigger member 40 can be connected to the protective member 10. In this case, the movable member 20 can drive the non-contact limit switch 30 to move relative to the trigger member 40.

[0079] It can be understood that the protective member 10 is a component for providing protection for the non-contact limit switch 30 and the trigger member 40. For example, it can be a box structure with various regular or irregular shapes ( Figure 1 this case is exemplarily shown in Figure 1 ), a housing structure, etc., but not limited thereto.

[0080] The movable member 20 can be movably arranged on the protective member 10 in a variety of movement modes. For example, it can be linearly movably arranged on the protective member 10 or rotatably arranged on the protective member 10. The movable member 20 can be a structure with various regular or irregular shapes. For example, a tubular structure ( Figure 1 this case is exemplarily shown in Figure 1 ), a rod-shaped structure, a plate-shaped structure, a block-shaped structure, etc., but not limited thereto.

[0081] The non-contact limit switch 30 refers to a limit switch that can achieve non-contact detection of the mechanical movement position, that is, a limit switch that can be triggered in a non-contact manner, which is different from the contact limit switch that needs to be directly contacted with the object to be measured. The non-contact limit switch 30 does not need to contact the object to be measured. For example, the non-contact limit switch 30 can be a magnetic limit switch or a magnetic attraction limit switch that emits a signal by detecting a magnetic field. In this case, the trigger 40 can include components that can generate a magnetic field (such as a permanent magnet, an electromagnet, etc.); the non-contact limit switch 30 can also be a proximity switch that emits a signal by detecting whether an object is approaching. In this case, the trigger 40 can be various components that can be detected by the non-contact limit switch 30. Exemplarily, when the trigger 40 and the non-contact limit switch 30 are relatively close to each other until the non-contact limit switch 30 detects the trigger 40 and is triggered, the non-contact limit switch 30 emits a signal. For example, the signal can be sent to a working device with a moving part, so that the working device with a moving part can execute corresponding control operations (such as controlling the moving part to stop moving) after receiving the signal; it can be that when the trigger 40 and the non-contact limit switch 30 are relatively far away from each other until the non-contact limit switch 30 loses the trigger, the non-contact limit switch 30 stops emitting the signal.

[0082] As can be seen from the above, in the limit device 100 provided by the embodiment of the present application, by providing the protective part 10 with a protective space 101 inside, both the non-contact limit switch 30 and the trigger 40 are located in the protective space 101 of the protective part 10, and the protective part 10 can protect the non-contact limit switch 30 and the trigger 40, which can improve the impact resistance of the limit device, effectively reduce the influence of the external environment on the non-contact limit switch 30 and the trigger 40, reduce the possibility of damage to the limit device 100, and thus is beneficial to improving the service life of the limit device 100 and reducing the replacement frequency.

[0083] Moreover, the trigger 40 and the non-contact limit switch 30 are relatively arranged and spaced apart, and one of the trigger 40 and the non-contact limit switch 30 is connected to the moving part 20, and the other is connected to the protective part 10. When the moving part 20 is affected by an external force (such as being affected by the force of an obstacle in contact with or colliding with the limit device 100) and moves relative to the protective part 10 to drive one of the trigger 40 and the non-contact limit switch 30 to move towards or away from the other, non-contact triggering of the non-contact limit switch 30 by the trigger 40 can be realized, that is, the two can be triggered without direct contact. Compared with a mechanical travel switch that needs to be directly contacted with an object to be triggered (with insufficient anti-fatigue performance, and the contact points are prone to aging, oxidation, and corrosion, resulting in failure), the failure risk can be effectively reduced, which is beneficial to further improving the service life of the limit device 100.

[0084] In some embodiments, referring to Figure 2 and Figure 5 , the non-contact limit switch 30 is a magnetic limit switch, and the trigger 40 includes a magnet.

[0085] It can be understood that the magnetic limit switch can also be called a magnetic sensor, which is a limit switch that can emit signals by detecting a magnetic field. For example, when the magnetic limit switch detects a magnetic field or detects an increase in the magnetic field (i.e., the magnet approaches the magnetic limit switch relatively), it emits an electronic signal to the machine equipment for reaction and judgment; of course, in some other cases, it can also be that the magnetic limit switch continuously detects the magnetic field, and when it does not detect the magnetic field or detects a decrease in the magnetic field (i.e., the magnet moves away from the magnetic limit switch relatively), it emits an electronic signal. Optionally, the magnetic limit switch can include a contact type reed switch or a non-contact type electronic switch. The principle of the contact type reed switch is that when the reed switch encounters a magnetic field, the metal reeds inside the tube are magnetized, causing the two originally separated reeds to adsorb to each other, achieving the purpose of contacting and conducting the circuit and then emitting a signal. The principle of the non-contact type electronic switch is to detect the magnetic field through a magnetoresistive IC and directly emit an electronic signal when the magnetic field is detected.

[0086] It can be understood that a magnet is an object that can generate a magnetic field. For example, it can be various permanent magnets with regular or irregular shapes, or an electromagnet.

[0087] Exemplarily, when the trigger 40 approaches the magnetic limit switch until it is detected, the magnetic limit switch emits an electronic signal to the machine equipment; when the trigger 40 moves away from the magnetic limit switch beyond the detection range of the magnetic limit switch, the magnetic limit switch stops emitting the electronic signal; it is beneficial for the controller of the machine equipment (such as a working equipment with moving parts) to identify and judge the signal emitted by the magnetic limit switch, so as to realize the automatic control of the actuator (such as the moving part of a working equipment with moving parts).

[0088] With such a setting, through the cooperation of the magnet and the magnetic limit switch, the existing contact type mechanical travel switch is abandoned, and the magnetic induction technology is adopted to avoid direct contact, effectively preventing the failure caused by the long-term fatigue work of the contact type mechanical travel switch and extending the service life of the limit switch.

[0089] It should be noted that the types and structures of the non-contact limit switch 30 and the trigger 40 are not limited to this. In some other embodiments, the non-contact limit switch 30 can also be a proximity switch.

[0090] It can be understood that a proximity switch, which can also be referred to as a position sensor, is a limit switch that can detect the approach of an object within the working distance and emit a signal. For example, it can be that when the proximity switch detects the approach of the trigger 40, it emits a signal. Of course, in some other cases, it can also be that the proximity switch continuously detects the trigger 40, and when the trigger 40 is not detected or the trigger 40 is detected to move away, a signal is emitted.

[0091] Optionally, the proximity switch can be an inductive proximity switch, a capacitive proximity switch, a Hall proximity switch, an optoelectronic limit switch, or an ultrasonic limit switch. The detection object of the inductive proximity switch is a conductive metal substance. It can be that the reaction when a conductive object encounters eddy currents affects the change of circuit parameters, so as to identify the approach or departure of the object, and then control the on or off of the switch; in this case, the trigger 40 can include metal. The detection object of the capacitive proximity switch can be most common dielectrics, including insulating liquids or powders, etc. It can be that the approach of the object causes a change in the capacitance of the capacitive proximity switch, and thus the circuit state connected to the measuring head also changes accordingly, and a signal is used to control the on or off of the switch; in this case, the trigger 40 can include various dielectrics, such as metal materials or non-metal materials. The detection object of the Hall proximity switch is a magnetic object. It can be that when a magnetic substance approaches the Hall proximity switch, the Hall element inside has the Hall effect, which causes a change in the internal circuit state of the switch, thereby identifying whether there is a magnetic object around and controlling the on or off of the switch; in this case, the trigger 40 can include a permanent magnet or a magnetic conductor (such as a conductor, a semiconductor, etc.).

[0092] With such a setting, by using a proximity switch, it is also possible to effectively prevent the failure situation caused by the long-term fatigue operation of the contact-type mechanical travel switch and extend the service life of the limit switch.

[0093] In some embodiments, please refer to Figure 2 and Figure 5 , the non-contact limit switch 30 can be a wireless non-contact limit switch, that is, the non-contact limit switch 30 does not need to be electrically connected to the mechanical equipment through wires to emit a signal. For example, the wireless non-contact limit switch can include a wireless signal sending module, and a signal is sent to the mechanical equipment through the wireless signal sending module. For example, the wireless non-contact limit switch can include a wireless communication module, and the wireless non-contact limit switch can be wirelessly communicatively connected to the mechanical equipment through the wireless communication module.

[0094] With such a setting, since the non-contact limit switch 30 is a wireless non-contact limit switch, the limit device can be a wireless limit device, without damaging the original circuit wiring of the mechanical equipment using the limit device, without breaking, connecting, or wiring the lines, which can effectively improve the installation efficiency, reduce the installation difficulty, and shorten the installation time. Moreover, since installing the limit device on the mechanical equipment does not damage the original wiring of the mechanical equipment, it can not only avoid potential later-stage failures caused by wiring modifications, but also restore the wiring and structure of the mechanical equipment when the limit device needs to be removed or disassembled later.

[0095] However, the installation of the wired limit switch in the related art is relatively complex. For example, when the limit switch is installed on a lifting device, it needs to be connected in series with the circuit that controls the upward movement of the lifting device. Therefore, it is necessary to break the wire on the circuit of the lifting device to achieve the power supply and the function of controlling the upward movement of the wired limit switch. Therefore, it requires relatively high skills for installers, and wire breaking is required during installation, resulting in a relatively high failure rate in the later stage and the inability to fully restore the equipment's wiring. Moreover, because the wired limit device is connected by wires, the wires are prone to interference or pulling with other objects during operation, causing the circuit to break. The wireless non-contact limit switch provided in the embodiments of the present application can solve the above problems.

[0096] Optionally, please refer to Figure 2 and Figure 3 , a window portion 1001 for the non-contact limit switch 30 to emit signals is provided on the protective member 10. For example, the window portion 1001 can be a through hole, an opening, a transparent part (such as a transparent plate), etc., but is not limited thereto. In this way, it is beneficial for the non-contact limit switch 30 to emit signals to the outside within the protective space.

[0097] It should be noted that in some other embodiments, the non-contact limit switch 30 can also be a wired non-contact limit switch, that is, the non-contact limit switch 30 can be electrically connected to the mechanical equipment through wires.

[0098] In some embodiments, please refer to Figure 2 , the non-contact limit switch 30 is entirely located within the protective space 101, and the triggering member 40 is entirely located within the protective space 101. In this way, it can provide an all-round protective effect for the non-contact limit switch 30, further reducing the possibility of the non-contact limit switch 30 being affected by the external environment, thereby further reducing the possibility of damage and further increasing the service life.

[0099] Of course, in some other embodiments, at least a part of the non-contact limit switch 30 and the triggering member 40 can also extend outside the protective space 101. For example, the end or edge of the non-contact limit switch 30 or the triggering member 40 is exposed outside the protective member 10.

[0100] In some embodiments, see Figure 1 and Figure 2 , the movable member 20 is movably arranged on the protective member 10 along the first direction A, the non-contact limit switch 30 is located on one side of the movable member 20 in the second direction B, the second direction B forms an angle with the first direction A, that is, the second direction B intersects with the first direction A, and the non-contact limit switch 30 is located beside the movable member 20, rather than at the end or end side of the movable member 20. In this way, the movement of the movable member 20 is not likely to affect the placement of the non-contact limit switch 30 in the first direction A, and is not likely to affect the relative approach or distance between the non-contact limit switch 30 and the trigger member 40 in the first direction A.

[0101] For example, the first direction A may be the height direction or length direction of the protective member 10 , the second direction B may be the width direction of the protective member 10 , and the first direction A is perpendicular to the second direction B. Of course, in some other embodiments, the first direction A may also be inclined to the height direction of the protective member 10 .

[0102] In some embodiments, see Figure 2 , Figure 5 and Figure 6 The protective member 10 has a first opening 102 and a second opening 103 at opposite ends thereof, the first opening 102 and the second opening 103 are both connected to the protective space 101 , and the movable member 20 is movably disposed in the first opening 102 , the protective space 101 and the second opening 103 .

[0103] Such a configuration is advantageous in that the protective member 10 is partially located within the protective space 101 and can be connected to the non-contact limit switch 30 or the trigger member 40, and the protective member 10 can partially extend outside the protective space 101 or be located at the first opening 102 and the second opening 103, and can contact external obstacles or can be connected to a resistance member for contacting obstacles.

[0104] For example, see Figure 2 , Figure 5 and Figure 6 , the protective member 10 may have a first opening 102 and a second opening 103 respectively formed at opposite ends in its height direction.

[0105] For example, see Figure 2 The movable member 20 is movably disposed along the first direction A and passes through the first opening 102 , the protective space 101 and the second opening 103 .

[0106] For example, see Figure 2 , Figure 5 and Figure 6, the movable member 20 can be a square tube or a rod with a square cross-section, and the first opening 102 and the second opening 103 can be square openings adapted to the circumferential outer wall of the movable member 20. The movable member 20 can be in clearance fit or transition fit with the first opening 102 and the second opening 103. For example, a clearance of 0-3 mm can be formed between the movable member 20 and the first opening 102, and a clearance of 0-3 mm can be formed between the movable member 20 and the second opening 103. In this way, it is beneficial to limit the circumferential rotation of the movable member 20 and improve the smoothness of the movement of the movable member 20 along its own length direction.

[0107] In some embodiments, referring to Figure 2 and Figure 5 , the limiting device 100 further includes a connecting member 50. The connecting member 50 is connected to the side wall of the movable member 20, and at least a part of the connecting member 50 is located in the protection space 101. The triggering member 40 or the non-contact limit switch 30 is connected to the connecting member 50 to be connected to the movable member 20 through the connecting member 50. In this way, it is beneficial for the triggering member 40 or the non-contact limit switch 30 to be connected to the side part of the movable member 20 through the connecting member 50.

[0108] It can be understood that the connecting member 50 is a structure for connecting the triggering member 40 or the non-contact limit switch 30 to the movable member 20, and can be various structures with regular or irregular shapes. For example, it can be a plate-like structure, a sheet-like structure, a rod-like structure, a block-like structure, etc., but not limited thereto.

[0109] Optionally, referring to Figure 2 , the connecting member 50 is entirely located in the protection space 101, is not easily affected by the outside, and is beneficial for the triggering member 40 or the non-contact limit switch 30 to be completely connected to the side part of the movable member 20 inside the protection space 101 through the connecting member 50. Of course, in some other embodiments, the connecting member 50 can also partially extend outside the protection space 101.

[0110] Optionally, referring to Figure 2 and Figure 5 , the connecting member 50 includes a first connecting portion 51 and a second connecting portion 52, and the first connecting portion 51 and the second connecting portion 52 are bent and connected. The first connecting portion 51 is connected to the side wall of the movable member 20, and the triggering member 40 or the non-contact limit switch 30 is connected to the second connecting portion 52. In this way, it is more beneficial for the triggering member 40 or the non-contact limit switch 30 to be connected to the side part of the movable member 20 through the connecting member 50.

[0111] It can be understood that both the first connecting portion 51 and the second connecting portion 52 can be various structures with regular or irregular shapes. For example, they can be a plate-like structure, a sheet-like structure, a rod-like structure, a block-like structure, etc., but not limited thereto. The first connecting portion 51 and the second connecting portion 52 can be integrally formed or separately formed and then connected.

[0112] Exemplarily, please refer to Figure 2 and Figure 5 , the first connecting portion 51 and the second connecting portion 52 are perpendicular to each other. The first connecting portion 51 is fixedly attached (e.g., welded, screwed or bolted) to the side wall of the movable member 20, and the second connecting portion 52 protrudes away from the movable member 20.

[0113] Optionally, please refer to Figure 2 , the limiting device 100 further includes a support member 61. The support member 61 is located in the protection space 101 and is connected to the protection member 10. The support member 61 and the connecting member 50 are located on the same side of the movable member. One end of the support member 61 facing the connecting member 50 is spaced apart from the end wall of the first end of the protection space 101. At least a part of the connecting member 50 is located between the end of the support member 61 facing the connecting member 50 and the end wall of the first end 1011 of the protection space 101. One of the trigger member 40 and the non-contact limit switch 30 is connected to the connecting member 50, and the other is connected to the support member 61. The trigger member 40 or the non-contact limit switch 30 connected to the support member 61 is located on the side of the support member 61 away from the movable member 20.

[0114] It can be understood that the support member 61 is a structure capable of supporting components for component installation, and can be various structures with regular or irregular shapes. For example, it can be a plate-like structure ( Figure 2 this situation is exemplarily shown in

[0115] ), a sheet-like structure, a rod-like structure, a block-like structure, etc., but not limited thereto. The first end 1011 of the protection space 101 can be the upper end or the lower end of the protection space 101.

[0116] Optionally, please refer to Figure 2 , the second connecting portion 52 is located between the end of the support member 61 facing the connecting member 50 and the end wall of the first end 1011 of the protection space 101.

[0117] Optionally, please refer to Figure 2 and Figure 5, the limiting device 100 further includes a placement member 62. The placement member 62 is located within the protection space 101 and is connected to the support member 61. The placement member 62 may be located on the side of the support member 61 facing away from the movable member 20. The placement member 62 has a placement space 601, and the non-contact limit switch 30 is disposed within the placement space 601; the trigger member 40 is connected to the connecting member 50. Exemplarily, the trigger member 40 is connected to the second connecting portion 52 of the connecting member 50.

[0118] It can be understood that the placement member 62 is a structure for placing the non-contact limit switch 30, and may be, for example, a housing structure, a box structure, etc., but is not limited thereto. The placement space 601 may be a space with an opening, or may not have an opening. Figure 2 and Figure 5 exemplarily shows that the placement member 62 is a box structure with an opening, and its opening faces away from the movable member 20 and the support member 61. The placement member 62 may be a placement member made of a non-metallic material, such as a placement member made of plastic, which is not likely to affect the trigger member 40 from triggering the non-contact limit switch 30 located within the placement space 601; of course, the placement member 62 may also be a placement member made of a metallic material, and a through hole, a transparent window, or other window parts may be provided on the side of the placement member 62 facing the trigger member 40, which is beneficial for the trigger member 40 to trigger the non-contact limit switch 30 located within the placement space 601 through the window part.

[0119] With such a setting, the placement member 62 can provide protection for the non-contact limit switch 30 within the protection space, which can further improve the protection performance and thus further improve the service life.

[0120] Exemplarily, the placement member 62 may be connected to the support member 61 by detachable connection means such as screws, bolts, etc., and snap connection structures, or may be fixedly connected to the support member 61 by welding.

[0121] Of course, in some other embodiments, the placement member 62 may not be provided, and the non-contact limit switch 30 may be directly connected to the support member 61 or the inner wall of the protection member 10. Of course, the support member 61 may also not be provided.

[0122] In some embodiments, please refer to Figure 4 , the movable member 20 is provided with a mounting portion for mounting the abutting member 200, and the abutting member 200 is used for abutting against an external object. In this way, it is convenient to install the required abutting member according to actual needs, for example, abutting members 200 with different lengths can be installed; when the abutting member 200 abuts against an external object, it is driven by the force to drive the movable member 20 to move relative to the protection member 10.

[0123] It can be understood that the abutting member 200 can be various components that can abut against an external object (such as an obstacle), for example, it can be a rod body, a tube body, a plate body, etc., but not limited thereto. The mounting portion can be various structures capable of mounting an object, for example, it can be a mounting hole, a mounting groove, a clamping structure, etc., but not limited thereto.

[0124] Optionally, please refer to Figure 1 、 Figure 2 and Figure 4 , the mounting portion includes a mounting space 201 for mounting the abutting member 200 and a mounting port 202 communicating with the mounting space 201 for the abutting member 200 to be inserted into the mounting space 201.

[0125] Exemplarily, the movable member 20 can be a tubular structure. At this time, the mounting space 201 is the internal space of the tubular structure; of course, the movable member 20 can also be various other shaped structures capable of forming a mounting space.

[0126] Optionally, the mounting space 201 extends along the moving direction of the movable member 20 (i.e., the first direction A), which is beneficial for the abutting member 200 to be arranged on the movable member 20 along the moving direction of the movable member 20.

[0127] Optionally, please refer to Figure 1 、 Figure 2 and Figure 4 , a mounting through hole 203 is formed on the side wall of the movable member 20, and the mounting through hole 203 communicates with the mounting space 201. The limiting device 100 further includes a fixing member 71, and the fixing member 71 is adjustably inserted through the mounting through hole 203, and the fixing member 71 is used to fix the abutting member 200 located in the mounting space 201.

[0128] It can be understood that the fixing member 71 can be various structures capable of passing through the through hole and fixing the abutting member 200, for example, it can be a fastener such as a screw, a bolt, a screw rod, a pin, a plug, etc., or it can also be a plug-in member, a clamping member, etc., but not limited thereto.

[0129] Optionally, please refer to Figure 1 、 Figure 3 and Figure 4 , the limiting device 100 further includes a cooperating member 72, and the cooperating member 72 is fixed to the side wall of the movable member 20. A threaded through hole 701 is formed on the cooperating member 72, and the threaded through hole 701 communicates with the mounting through hole 203. The fixing member 71 is threadedly connected to the threaded through hole 701, and an external thread for threadedly cooperating with the threaded through hole 701 is provided on the outer surface of the fixing member 71.

[0130] It can be understood that the cooperating member 72 can be various structural members capable of forming a threaded through hole, for example, it can be a nut member, and of course it can also be a block-shaped structure, a plate-shaped structure, etc. provided with a threaded through hole.

[0131] With such a setting, by screwing the fixing member 71, it is possible to adjust the movement of the fixing member 71 towards or away from the abutting member 200, which is beneficial for the fixing member 71 to abut against the abutting member 200 and fix the abutting member 200 within the installation space 201, and is also beneficial for the fixing member 71 to separate from the abutting member 200 so that the abutting member 200 can move within the installation space 201, which is beneficial for adjusting the position of the abutting member 200 within the installation space 201, and is also beneficial for the abutting member 200 to move out of the installation space 201.

[0132] It should be noted that in some other embodiments, the cooperating member 72 may not be provided. For example, if the installation through hole 203 is a threaded through hole, the fixing member 71 can be directly threadedly connected to the installation through hole 203.

[0133] In some embodiments, referring to Figure 2 , the limiting device 100 further includes an elastic member 80. The elastic member 80 is connected to the movable member 20 and the protective member 10, and the elastic member 80 is used to provide a force for moving one of the trigger member 40 and the non-contact limit switch 30 away from the other one driven by the movable member 20.

[0134] It can be understood that the elastic member 80 can be various structural members that can undergo elastic deformation to provide an elastic restoring force, such as various forms of springs, reed pieces, rubber bodies, etc., but not limited thereto.

[0135] With such a setting, when the movable member 20 is subjected to an external force and moves relative to the protective member 10, it not only drives one of the trigger member 40 and the non-contact limit switch 30 towards the other one, but also applies a force to the elastic member 80, causing the elastic member 80 to undergo elastic deformation; when the external force on the movable member 20 is removed, under the action of the elastic restoring force of the elastic member 80, the movable member 20 moves in the opposite direction relative to the protective member 10, and further drives one of the trigger member 40 and the non-contact limit switch 30 away from the other one, which is beneficial for the reset of the movable member 20.

[0136] Optionally, the elastic member 80 is a spring. The spring is located within the protective space 101 and sleeved on the movable member 20. Exemplarily, the opposite ends of the spring can respectively abut against the connecting member 50 and the inner wall of the protective space 101.

[0137] In some embodiments, referring to Figure 1 and to Figure 3The protective member 10 includes a top plate 11, a bottom plate 12, a first side plate 13, a second side plate 14, a first end plate 15, and a second end plate 16. The top plate 11 and the bottom plate 12 are arranged opposite to each other and spaced apart, for example, they can be arranged in sequence along the first direction A. The first side plate 13 and the second side plate 14 are arranged opposite to each other and spaced apart, the first side plate 13 is connected to the same side of the top plate 11 and the bottom plate 12, and the second side plate 14 is connected to the other side of the top plate 11 and the bottom plate 12. The first end plate 15 and the second end plate 16 are arranged opposite to each other and spaced apart, the first end plate 15 is connected to the same end of the top plate 11 and the bottom plate 12, and the second end plate 16 is connected to the other end of the top plate 11 and the bottom plate 12.

[0138] The top plate 11 , the bottom plate 12 , the first side plate 13 , the second side plate 14 , the first end plate 15 and the second end plate 16 together form a protective space 101 .

[0139] In this way, the top plate 11, the bottom plate 12, the first side plate 13, the second side plate 14, the first end plate 15 and the second end plate 16 can be connected to form a shell structure with a protective space 101, which is roughly a rectangular parallelepiped, which is beneficial for protecting the trigger member 40 and the non-contact limit switch 30 from all directions.

[0140] Optionally, see Figure 1 and Figure 2 The movable member 20 is movably disposed on the top plate 11 and the bottom plate 12. For example, a first opening 102 is provided on the top plate 11, and a second opening 103 is provided on the bottom plate 12. Of course, in some other embodiments, the movable member 20 may also be movably disposed on the top plate 11 or the bottom plate 12.

[0141] Optionally, see Figure 2 The opposite sides of the support member 61 are respectively connected to the first side plate 13 and the second side plate 14. The support member 61 is spaced apart from the top plate 11, and the connecting member 50 is at least partially located between the end of the support member 61 facing the top plate 11 and the inner wall of the top plate 11.

[0142] Optionally, see Figure 2 and Figure 5 The first end plate 15 is detachably connected to at least one of the top plate 11, the bottom plate 12, the first side plate 13 and the second side plate 14. In this way, it is convenient to disassemble the first end plate 15 to facilitate installation or removal of the non-contact limit switch 30.

[0143] It can be understood that the first end plate 15 can be connected to at least one of the top plate 11, the bottom plate 12, the first side plate 13, and the second side plate 14 by various detachable connection methods. For example, it can be connected by fasteners such as screws and bolts. Another example is that the first end plate 15 can be provided with a clamping portion, and at least one of the top plate 11, the bottom plate 12, the first side plate 13, and the second side plate 14 is provided with a clamping mating portion, and the clamping portion and the clamping mating portion are clamped and mated with each other. One of the clamping portion and the clamping mating portion can be a clamping protrusion, and the other is a clamping groove.

[0144] Optionally, please refer to Figure 2 and Figure 5 , the placement member 62 is a box structure with an open end, and its open end faces away from the movable member 20 and the support member 61 and faces the first end plate 15.

[0145] Optionally, please refer to Figure 1 and Figure 3 , a first extension portion 131 protrudes from a side of the first side plate 13 away from the first end plate 15, and a second extension portion 141 protrudes from a side of the second side plate 14 away from the first end plate 15. The second extension portion 141 is opposite to and spaced apart from the first extension portion 131.

[0146] It can be understood that the first extension portion 131 and the second extension portion 141 can be a plate-like structure, a rod-like structure, etc., but are not limited thereto.

[0147] With such a setting, it is beneficial for the limiting device 100 to be installed on the mechanical equipment through the first extension portion 131 and the second extension portion 141, for example, installed on a rod body of the mechanical equipment, and the rod body can be located between the first extension portion 131 and the second extension portion 141; it is beneficial to improve the installation stability of the limiting device 100 on the mechanical equipment.

[0148] Optionally, please refer to Figure 1 and Figure 3 , at least one first connection hole 1310 is formed on the first extension portion 131, and at least one second connection hole 1410 is formed on the second extension portion 141. In this way, it is beneficial for fasteners such as screws, bolts, screws, pins, and pin shafts to pass through the first connection hole 1310 and the second connection hole 1410 and be connected to the mechanical equipment.

[0149] Of course, in some other embodiments, the first connection hole 1310 and the second connection hole 1410 may not be provided. The first extension portion 131 and the second extension portion 141 may also not be provided. For example, at least one of the top plate 11, the bottom plate 12, the first side plate 13, the second side plate 14, the first end plate 15, and the second end plate 16 may be directly installed on the mechanical equipment.

[0150] In some embodiments, please refer to Figure 2 andFigure 6 The limiting device 100 further includes an alarm component 90, which is arranged in the protection space 101 and electrically connected to the non-contact limit switch 30.

[0151] It can be understood that the alarm component 90 can be various mechanisms capable of giving an alarm. For example, it can be an alarm component that emits a warning sound, an alarm component that emits a warning light, an alarm component that emits both sound and light, or an alarm component that emits an alarm signal, but not limited to this.

[0152] With such a setting, when the non-contact limit switch 30 is triggered by the triggering member 40, it is beneficial for the alarm component 90 to give an alarm to remind the equipment operator and reduce the possibility of secondary injury to the personnel. Moreover, the alarm component 90 is arranged in the protection space 101, and the protection member 10 can protect the alarm component 90.

[0153] Optionally, please refer to Figure 2 and Figure 6 The alarm component 90 includes a sound alarm 91 and a light alarm 92. The sound alarm 91 and the light alarm 92 are arranged in the protection space 101, and both the sound alarm 91 and the light alarm 92 are electrically connected to the non-contact limit switch 30.

[0154] It can be understood that the sound alarm 91 is an alarm that can emit a warning sound, such as a voice alarm horn, but not limited to this; the warning sound can be various warning sounds and can be set according to actual needs. The light alarm 92 is an alarm that can emit a warning light, such as a strobe warning light, but not limited to this; the warning light can be various warning lights, such as a flashing light, a constantly-on light, etc., but not limited to this and can be set according to actual needs.

[0155] With such a setting, when the non-contact limit switch 30 is triggered by the triggering member 40, the sound alarm 91 can emit a warning sound and the light alarm 92 can emit a warning light, which can improve the warning effect on the equipment operator and is beneficial for further reducing the possibility of secondary injury to the personnel.

[0156] Optionally, please refer to Figure 1 and Figure 2 An exposure window 1002 is provided on the protection member 10 for the light emitted by the light alarm 92 to be exposed outside the protection member. The position of the light alarm 92 corresponds to the position of the exposure window 1002.

[0157] It can be understood that the exposure window 1002 can be various exposure windows through which the light emitted by the light alarm 92 can pass, such as a through hole, a transparent plate, etc., but not limited to this.

[0158] Optionally, please refer toFigure 1 and Figure 2 , the alarm assembly 90 is disposed on the first end plate 15. The revealing window 1002 may be disposed on the first end plate 15.

[0159] The embodiment of the present application further provides an operating device with a moving part, the operating device with a moving part comprises an operating device and a limiting device 100 of any of the above embodiments. The operating device comprises a movable moving part. The limiting device 100 is arranged on the moving part.

[0160] It can be understood that the working equipment with moving parts is a mechanical equipment including moving parts that need to be moved, such as aerial work platforms, lifts, vehicles, robots, pneumatic devices, hydraulic devices, etc., but not limited to these.

[0161] Since the working equipment with movable parts provided in the embodiment of the present application adopts the limiting device 100 of the above embodiment, it also has the technical effects brought by the technical solution of the limiting device 100 of any of the above embodiments, which will not be repeated here.

[0162] In some embodiments, the working equipment with moving parts further includes a resistance member 200 , which is installed on the movable member 20 .

[0163] The following is an exemplary description of the cooperation between the limit device and the operating equipment with moving parts:

[0164] A tube (abutment 200) of suitable size and length is installed in the movable part 20 which is a square iron tube and is tightened by a fixing part 71 which is a fastening screw. When the tube touches the obstacle above, the tube drives the square iron tube to move downward, and the right-angle iron sheet (connecting part 50) on the square iron tube also moves accordingly, and the permanent magnet sheet (triggering part 40) on the right-angle iron sheet also moves accordingly, and the permanent magnet sheet moves toward the magnetic limit switch (non-contact limit switch 30). The closer the distance between the permanent magnet sheet and the magnetic limit switch is, the stronger the detected magnetism is. When the critical distance is reached, the reed sheet inside the magnetic limit switch will be attracted, so that the magnetic limit switch changes from open circuit to pass circuit, and the internal chip of the magnetic limit switch can send a limit signal to the operating equipment with moving parts, so as to stop the moving parts of the operating equipment with moving parts from continuing to move, and the alarm component 90 will start to work, the light alarm 92 will emit a flashing warning light, and the sound alarm 91 will emit a voice alarm. On the contrary, when the pipe leaves the obstacle, the pipe drives the square iron pipe to move upward, and the right-angle iron sheet moves upward accordingly, and the permanent magnet sheet also moves upward accordingly, and the distance from the magnetic limit switch becomes farther and farther. When the critical distance is reached, the reed inside the magnetic limit switch will be disconnected, causing the magnetic limit switch to change from a passage to an open circuit, and the internal chip of the magnetic limit switch stops sending a limit signal to the operating equipment with moving parts, and the moving parts of the operating equipment with moving parts can resume action, and the light alarm 92 will stop flashing, and the sound alarm 91 will stop sounding the alarm.

[0165] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A limiting device, characterized in that: The limiting device comprises: A protective member, wherein a protective space is provided inside the protective member; A movable part, wherein the movable part is movably arranged on the protective part; a non-contact limit switch, the non-contact limit switch being located in the protection space; and A triggering member, the triggering member is located in the protective space, and the triggering member and the non-contact limit switch are arranged opposite and spaced apart; the triggering member is used for non-contact triggering the non-contact limit switch; Wherein, one of the trigger member and the non-contact limit switch is connected to the movable member, and the other of the trigger member and the non-contact limit switch is connected to the protective member; the movable member can move relative to the protective member to drive one of the trigger member and the non-contact limit switch to move toward or away from the other of the trigger member and the non-contact limit switch.

2. The limiting device according to claim 1, characterized in that: The non-contact limit switch is a magnetic limit switch, and the trigger member includes a magnet; or the non-contact limit switch is a proximity switch; And / or, the non-contact limit switch is a wireless non-contact limit switch, and the protective member is provided with a window portion for the non-contact limit switch to send a signal; And / or, the limit device further comprises an alarm component, the alarm component is arranged in the protection space, and the alarm component is electrically connected to the non-contact limit switch; The alarm assembly includes a sound alarm and a light alarm, the sound alarm and the light alarm are arranged in the protection space, and the sound alarm and the light alarm are both electrically connected to the non-contact limit switch; The protective member is provided with a revealing window for allowing the light emitted by the light alarm to be revealed outside the protective member; the position of the light alarm corresponds to the position of the revealing window.

3. The limiting device according to claim 1, characterized in that: The non-contact limit switches are all located in the protection space, and / or the trigger members are all located in the protection space; And / or, the movable member is movably disposed on the protective member along a first direction, the non-contact limit switch is located on one side of the movable member in a second direction, and the second direction forms an angle with the first direction; And / or, the protective member is provided with a first opening and a second opening at opposite ends thereof, the first opening and the second opening are both connected to the protective space, and the movable member is movably arranged in the first opening, the protective space and the second opening.

4. The limiting device according to any one of claims 1 to 3, characterized in that: The limit device also includes a connecting member, which is connected to the side wall of the movable member and is at least partially located in the protective space; the trigger member or the non-contact limit switch is connected to the connecting member to be connected to the movable member through the connecting member.

5. The limiting device according to claim 4, characterized in that: All of the connecting parts are located in the protective space; and / or The connecting member includes a first connecting portion and a second connecting portion, wherein the first connecting portion is bent and connected to the second connecting portion; the first connecting portion is connected to the side wall of the movable member, and the trigger member or the non-contact limit switch is connected to the second connecting portion.

6. The limiting device according to claim 4, characterized in that: The limit device further comprises a support member, the support member is located in the protective space and connected to the protective member, the support member and the connecting member are located on the same side of the movable member; the end of the support member facing one end of the connecting member is spaced apart from the end wall of the first end of the protective space, and the connecting member is at least partially located between the end of the support member facing one end of the connecting member and the end wall of the first end of the protective space; one of the trigger member and the non-contact limit switch is connected to the connecting member, and the other is connected to the support member; the trigger member or the non-contact limit switch connected to the support member is located on the side of the support member facing away from the movable member; The limiting device further comprises a placement member, which is located in the protection space and connected to the support member; The placement member has a placement space, and the non-contact limit switch is arranged in the placement space; The triggering member is connected to the connecting member.

7. The limiting device according to any one of claims 1, 2, 3, 5 and 6, characterized in that: The movable part is provided with a mounting portion for mounting a resisting member, and the resisting member is used to resist an external object; The mounting portion comprises an mounting space for mounting the abutment member and an mounting opening connected to the mounting space for placing the abutment member into the mounting space; A mounting through hole is provided on the side wall of the movable part, and the mounting through hole is communicated with the mounting space; the limiting device further comprises a fixing member, and the fixing member is adjustably inserted into the mounting through hole, and the fixing member is used to fix the abutment member located in the mounting space; The limiting device further comprises a matching piece, which is fixed to the side wall of the movable piece; a threaded through hole is formed on the matching piece, which is connected to the mounting through hole; and the fixing piece is threadedly connected to the threaded through hole; The installation space is extended along the moving direction of the movable part.

8. The limiting device according to any one of claims 1, 2, 3, 5 and 6, characterized in that: The limit device further includes an elastic member, the elastic member is connected to the movable member and the protective member, and the elastic member is used to provide a force that causes the movable member to drive one of the trigger member and the non-contact limit switch to move away from the other of the trigger member and the non-contact limit switch; The elastic member is a spring; the spring is located in the protection space and sleeved on the movable member.

9. The limiting device according to any one of claims 1, 2, 3, 5 and 6, characterized in that: The protective element comprises: A top plate and a bottom plate, the top plate and the bottom plate are arranged opposite to each other and spaced apart; A first side plate and a second side plate, the first side plate and the second side plate are arranged opposite to each other and spaced apart, the first side plate is connected to the same side of the top plate and the bottom plate, and the second side plate is connected to the other side of the top plate and the bottom plate; A first end plate and a second end plate, the first end plate and the second end plate are arranged opposite to each other and spaced apart, the first end plate is connected to the same end of the top plate and the bottom plate, and the second end plate is connected to the other end of the top plate and the bottom plate; The top plate, the bottom plate, the first side plate, the second side plate, the first end plate and the second end plate enclose the protective space; the movable member is movably arranged on the top plate and / or the bottom plate; The first end plate is detachably connected to at least one of the top plate, the bottom plate, the first side plate, and the second side plate; A first extension portion is protruded from a side of the first side plate away from the first end plate, and a second extension portion is protruded from a side of the second side plate away from the first end plate. The second extension portion is opposite to the first extension portion and is arranged at an interval. At least one first connecting hole is opened on the first extension portion, and at least one second connecting hole is opened on the second extension portion.

10. A working device having a moving part, characterized in that: The working equipment with moving parts comprises: A working device, the working device comprising a movable part capable of moving; and The limiting device according to any one of claims 1 to 9, wherein the limiting device is arranged on the moving part.

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