runout switch

Abstract

The application relates to the technical field of off-track switch, and provides an off-track switch, which comprises a seat body provided with an opening and a containing cavity, the opening is communicated with the containing cavity, a contact assembly comprising a contact piece, part of the contact piece is arranged in the containing cavity through the opening, the contact piece can slide relative to the containing cavity along the axial direction of the seat body, a detection assembly comprising a first detection switch, the first detection switch is arranged on the side wall of the containing cavity, when the contact piece slides to a detection position of the first detection switch, the contact piece can trigger the first detection switch, and a limiting assembly connected with the first detection switch and used for locking or unlocking the first detection switch; wherein, when the limiting assembly locks the first detection switch, the limiting assembly limits the first detection switch on the side wall of the containing cavity; when the limiting assembly unlocks the first detection switch, the first detection switch can slide relative to the side wall of the containing cavity along the axial direction of the seat body.

Description

Technical Field

[0001] This application relates to the field of deviation switch technology, and more particularly to a deviation switch. Background Technology

[0002] In the fields of industrial automation and material handling, belt conveyors are widely used for transporting various materials. However, during operation, belt misalignment often occurs, leading to reduced material conveying efficiency and even damage to the equipment. Therefore, belt misalignment switches have emerged to detect belt deviation. However, existing belt misalignment switches have fixed trigger strokes, which cannot be adjusted based on the switch's installation location or the misalignment capability of the equipment being monitored, resulting in poor versatility. Utility Model Content

[0003] This application addresses the shortcomings of the prior art by providing a deviation switch, comprising: a base having an opening and a receiving cavity, the opening communicating with the receiving cavity; a contact assembly including a contact member, a portion of which passes through the opening and is disposed within the receiving cavity, the contact member being slidable relative to the receiving cavity along the axial direction of the base; a detection assembly including a first detection switch disposed on the side wall of the receiving cavity, the contact member triggering the first detection switch when it slides to the detection position of the first detection switch; and a limiting assembly connected to the first detection switch for locking or unlocking the first detection switch; wherein, when the limiting assembly locks the first detection switch, the limiting assembly limits the first detection switch to the side wall of the receiving cavity; when the limiting assembly unlocks the first detection switch, the first detection switch is slidable relative to the side wall of the receiving cavity along the axial direction of the base.

[0004] Furthermore, the side wall of the receiving cavity is provided with a sliding hole, which extends axially along the seat body, and a portion of the first detection switch passes through the sliding hole; the limiting assembly includes a first limiting member and a second limiting member, the first limiting member is located on the side of the sliding hole facing the receiving cavity, and the second limiting member is located on the side of the sliding hole away from the receiving cavity, the width of the first limiting member and the width of the second limiting member are respectively greater than the width of the sliding hole, the first limiting member and the second limiting member are respectively sleeved on the outside of the first detection switch, and are respectively threaded to the first detection switch.

[0005] Furthermore, the deviation switch also includes: a limiting plate disposed within the receiving cavity, the limiting plate having a sliding groove extending along the axial direction of the base body, the sliding groove communicating with the sliding hole; a portion of a first detection switch passing through the sliding hole located within the sliding groove, a first limiting member located within the sliding groove, and the sidewall of the sliding groove capable of restricting the rotation of the first limiting member.

[0006] Furthermore, the first detection switch includes a proximity switch.

[0007] Furthermore, the inner wall of the receiving cavity is provided with a limiting protrusion, and the outer wall of the contact member is provided with a limiting groove. The limiting protrusion and / or the limiting groove extend along the axial direction of the seat body, and the limiting protrusion is adapted to the limiting groove; or, the inner wall of the receiving cavity is provided with a limiting groove, and the outer wall of the contact member is provided with a limiting protrusion. The limiting groove and / or the limiting protrusion extend along the axial direction of the seat body, and the limiting groove is adapted to the limiting protrusion.

[0008] Furthermore, when the limiting protrusion is provided on the outer side wall of the contact member, the limiting protrusion is located at the end of the contact member facing the bottom wall of the receiving cavity, and the limiting protrusion can abut against the axial side wall of the opening to restrict the contact member from exiting the receiving cavity; when the limiting groove is provided on the outer side wall of the contact member, a boss is provided at the end of the contact member facing the bottom wall of the receiving cavity, the boss extends radially along the seat body, the boss is provided with the limiting protrusion, and the boss can abut against the axial side wall of the opening to restrict the contact member from exiting the receiving cavity.

[0009] Furthermore, the bottom wall of the receiving cavity is provided with a sleeve, and the contact assembly further includes a connecting rod. The connecting rod is connected to the wall surface of the contact member facing the bottom wall of the receiving cavity. The connecting rod is disposed inside the sleeve and is slidable relative to the sleeve along the axial direction of the seat. Alternatively, the bottom wall of the receiving cavity is provided with a connecting rod, and the contact assembly further includes a sleeve. The sleeve is connected to the wall surface of the contact member facing the bottom wall of the receiving cavity. The sleeve is sleeved on the outside of the connecting rod and is slidable relative to the connecting rod along the axial direction of the seat.

[0010] Furthermore, the side wall of the receiving cavity is provided with a mounting through hole, and the deviation switch also includes a vent valve, which is located in the mounting through hole, allowing the receiving cavity to communicate with the outside through the vent valve.

[0011] Furthermore, the detection component also includes a second detection switch, disposed on the side wall of the receiving cavity along the axial direction of the seat, the second detection switch being spaced apart from the first detection switch.

[0012] Furthermore, the deviation switch also includes a seal disposed between the sidewall of the opening and the contact member, the contact member being slidable relative to the seal.

[0013] The embodiments described in this application have the following beneficial effects:

[0014] In this embodiment, the limiting component is connected to the first detection switch. When the limiting component unlocks the first switch, the first detection switch can slide along the axial direction of the base to change the distance between the detection position of the first detection switch and the opening, thereby changing the sliding stroke of the contact member within the receiving cavity to trigger the first detection switch. After changing the position of the first detection switch, the limiting component can lock the first detection switch to fix it, improving the stability of the position setting of the first detection switch. In this embodiment, by changing the position of the first detection switch, the trigger stroke of the contact member can be changed, thereby enabling the belt misalignment switch to adapt to conveyor belts with different offsets or various installation positions, improving the versatility of the belt misalignment switch. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. The accompanying drawings described below are merely exemplary embodiments of this application.

[0016] Figure 1 This is a schematic cross-sectional view of a misalignment switch according to this application. Figure 1 ;

[0017] Figure 2 This is a schematic diagram showing the structure of a deviation switch according to this application;

[0018] Figure 3 This is a schematic cross-sectional view of a misalignment switch according to this application. Figure 2 ;

[0019] Figure 4 This is a schematic cross-sectional view of a misalignment switch according to this application. Figure 3 ;as well as

[0020] Figure 5 This is a schematic cross-sectional view of a misalignment switch according to this application. Figure 4 .

[0021] 100. Base; 110. Receiving cavity; 111. Sliding hole; 120. Limiting protrusion; 130. Sleeve; 101. Bottom shell; 102. Upper shell;

[0022] 200. Contact assembly; 210. Contact element; 220. Boss; 221. Limiting groove; 230. Connecting rod;

[0023] 300. Detection component; 310. First detection switch; 320. Second detection switch;

[0024] 400, Limiting component; 410, First limiting element; 420, Second limiting element;

[0025] 500. Limiting plate; 510. Sliding groove;

[0026] 600, elastic element; 700, vent valve; 800, sealing element. Detailed Implementation

[0027] The technical solutions in this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0028] This application provides a misalignment switch, such as Figures 1 to 5 As shown, the deviation switch includes a base 100, a contact assembly 200, a detection assembly 300, and a limiting assembly 400. The base 100 has an opening and a receiving cavity 110, with the opening communicating with the receiving cavity 110. The contact assembly 200 includes a contact member 210, a portion of which passes through the opening and is disposed within the receiving cavity 110. Along the axial direction of the base 100, the contact member 210 is slidable relative to the receiving cavity 110. The detection assembly 300 includes a first detection switch 310, which is disposed on the side wall of the receiving cavity 110. When the contact member 210 slides to the detection position of the first detection switch 310, the contact member 210 can trigger the first detection switch 310. The limiting assembly 400 is connected to the first detection switch 310 and is used to lock or unlock the first detection switch 310.

[0029] When the limiting component 400 locks the first detection switch 310, the limiting component 400 limits the first detection switch 310 to the side wall of the receiving cavity 110; when the limiting component 400 unlocks the first detection switch 310, the first detection switch 310 can slide relative to the side wall of the receiving cavity 110 along the axial direction of the seat 100.

[0030] In this embodiment, the belt misalignment switch can be used in a belt conveyor, which may include a conveyor belt. The conveyor belt can be a leather belt, rubber belt, plastic belt, or fabric belt, etc. This application does not impose specific limitations on this type of belt, as long as it achieves the technical principles of this application.

[0031] The base 100 of the belt misalignment switch has an opening and a receiving cavity 110. A portion of the contact element 210 passes through the opening and is disposed within the receiving cavity 110. The contact element 210 can slide along the axial direction of the base 100. A first detection switch 310 is disposed on the side wall of the receiving cavity 110. When the belt conveyor is operating normally, the conveyor belt does not drive the contact element 210 to move, and the contact element 210 is in its initial position. When the conveyor belt deviates, the conveyor belt contacts the end of the contact element 210 away from the receiving cavity 110, and can drive the contact element 210 to slide towards the receiving cavity 110. When the contact element 210 slides to the detection position of the first detection switch 310, the contact element 210 can trigger the first detection switch 310. At this time, the first detection switch 310 can send a signal to remind that the conveyor belt has deviated.

[0032] The belt misalignment switch also includes a limiting component 400, which is connected to the first detection switch 310. When the limiting component 400 unlocks the first switch, the first detection switch 310 can slide along the axial direction of the base 100 to change the distance between the detection position of the first detection switch 310 and the opening, thereby changing the sliding stroke of the contact 210 within the receiving cavity 110 to trigger the first detection switch 310. After changing the position of the first detection switch 310, the limiting component 400 can be used to lock the first detection switch 310 to fix it and improve the stability of the position setting of the first detection switch 310. In this embodiment, by changing the position of the first detection switch 310, the trigger stroke of the contact 210 can be changed, thereby enabling the belt misalignment switch to adapt to conveyor belts with different offsets or various installation positions, improving the versatility of the belt misalignment switch.

[0033] Among them, "axial direction of seat 100" can refer to the direction in which the opening faces or is away from the bottom wall of the receiving cavity 110.

[0034] For example, such as Figure 2 and Figure 3 As shown, the sidewall of the receiving cavity 110 may be provided with a sliding hole 111, which extends axially along the seat 100, and a portion of the first detection switch 310 passes through the sliding hole 111. The limiting assembly 400 may include a first limiting member 410 and a second limiting member 420. The first limiting member 410 is located on the side of the sliding hole 111 facing the receiving cavity 110, and the second limiting member 420 is located on the side of the sliding hole 111 away from the receiving cavity 110. The width of the first limiting member 410 and the width of the second limiting member 420 are respectively greater than the width of the sliding hole 111. The first limiting member 410 and the second limiting member 420 are respectively sleeved on the outside of the first detection switch 310 and are respectively threadedly connected to the first detection switch 310.

[0035] The sidewall of the receiving cavity 110 is provided with a sliding hole 111, which extends along the axial direction of the base 100. It is understood that the sliding hole 111 can be strip-shaped, racetrack-shaped, elliptical, or other irregular shapes. A portion of the first detection switch 310 passes through the sliding hole 111 and is located within the receiving cavity 110, and the first detection switch 310 can slide along the axial direction of the base 100. That is, along the axial direction of the base 100, the extension length of the sliding hole 111 is greater than the diameter of the portion of the first detection switch 310 (the portion of the first detection switch 310 located within the sliding hole 111).

[0036] The extension length of the sliding hole 111 along the axial direction of the base 100 can reflect the adjustment range of the trigger stroke of the trigger element. Under the condition that other factors remain unchanged, the longer the extension length of the sliding hole 111, the longer the distance that the first detection switch 310 slides along the axial direction of the base 100, and the larger the adjustment range of the trigger stroke of the trigger element; the shorter the extension length of the sliding hole 111, the shorter the distance that the first detection switch 310 slides along the axial direction of the base 100, and the smaller the adjustment range of the trigger stroke of the trigger element.

[0037] It should be noted that the above description of the sliding hole 111 is merely exemplary. As long as the sliding hole 111 allows the first detection switch 310 to pass through the sliding hole 111 and be located within the receiving cavity 110, and the first detection switch 310 can slide along the axial direction of the seat 100, the specific arrangement of the sliding hole 111 is not specifically limited here.

[0038] The first limiting member 410 and the second limiting member 420 are located on both sides of the sliding hole 111, that is, on both sides of the sidewall of the receiving cavity 110. The width of the first limiting member 410 and the width of the second limiting member 420 are respectively greater than the width of the sliding hole 111, so that the first limiting member 410 and the second limiting member 420 can be connected to the sidewall of the receiving cavity 110. The extending direction of the width of the first limiting member 410, the width of the second limiting member 420, or the width of the sliding hole 111 intersects (e.g., is perpendicular to) the axial direction of the seat 100. The first limiting member 410 and the second limiting member 420 are threadedly connected to the outer sidewall of the first detection switch 310.

[0039] When the limiting assembly 400 locks the first detection switch 310, the first limiting member 410 and / or the second limiting member 420 can rotate relative to the first detection switch 310 to move toward the side wall of the receiving cavity 110, clamping the side wall of the receiving cavity 110 between the first limiting member 410 and the second limiting member 420, so that the limiting assembly 400 is fixed relative to the side wall of the receiving cavity 110, thereby fixing and locking the first detection switch 310. When the limiting component 400 unlocks the first detection switch 310, the first limiting member 410 and / or the second limiting member 420 can rotate relative to the first detection switch 310 to move away from the side wall of the receiving cavity 110. The first limiting member 410 and / or the second limiting member 420 separate from the side wall of the receiving cavity 110, unlocking the first detection switch 310, allowing the first detection switch 310 to slide relative to the sliding hole 111, thereby changing the position of the first detection switch 310 and adjusting the trigger stroke of the trigger member.

[0040] For example, the outer wall of the first detection switch 310 may be provided with external threads, the first limiting member 410 may be provided with internal threads, and the second limiting member 420 may be provided with internal threads. Further, the first limiting member 410 may include a first nut, and the second limiting member 420 may include a second nut.

[0041] It is understood that the above description of the first limiting member 410 and the second limiting member 420 is merely exemplary. The first limiting member 410 and the second limiting member 420 can also be other components with internal threads, as long as the first limiting member 410 and the second limiting member 420 can be threadedly connected to the first detection switch 310 respectively. The specific structure of the first limiting member 410 and the second limiting member 420 is not specifically limited here.

[0042] The first limiting member 410 is located on the side of the sliding hole 111 facing the receiving cavity 110, that is, the first limiting member 410 is located inside the receiving cavity 110. The second limiting member 420 is located on the side of the sliding hole 111 away from the receiving cavity 110, that is, the second limiting member 420 is located outside the receiving cavity 110. When unlocking or locking the first detection switch 310, the operator can directly rotate the second limiting member 420 on the outside of the receiving cavity 110, so that the second limiting member 420 rotates relative to the first detection switch 310.

[0043] For example, such as Figure 1 and Figure 3As shown, the deviation switch also includes a limiting plate 500, which is disposed within the receiving cavity 110. The limiting plate 500 has a sliding groove 510, which extends axially along the base 100 and communicates with the sliding hole 111. A portion of the first detection switch 310 passing through the sliding hole 111 is located within the sliding groove 510, and the first limiting member 410 is located within the sliding groove 510. The sidewall of the sliding groove 510 can restrict the rotation of the first limiting member 410.

[0044] The limiting plate 500 is disposed within the receiving cavity 110, that is, the limiting plate 500 is located on the side of the sliding hole 111 facing the receiving cavity 110. Thus, the portion of the first detection switch 310 passing through the sliding hole 111 is located within the sliding groove 510. Similarly, the first limiting member 410 is located within the sliding groove 510. The sliding groove 510 extends axially along the base 100 and communicates with the sliding hole 111. Thus, when the first detection switch 310 slides along the sliding hole 111, the first detection switch 310 and the first limiting member 410 can also slide relative to the sliding groove 510.

[0045] The sidewalls of the sliding groove 510 can restrict the rotation of the first limiting member 410. For example, along the width direction of the first limiting member 410, the two opposing inner sidewalls of the sliding groove 510 abut against the two opposing outer sidewalls of the first limiting member 410 to restrict the rotation of the first limiting member 410. In this way, the first detection switch 310 can be rotated outside the receiving groove, causing the first limiting member 410 to rotate relative to the first detection switch 310, which facilitates operation.

[0046] Furthermore, the bottom wall of the sliding groove 510 can also abut against the end of the first detection switch 310 to limit the length of the first detection switch 310 extending into the receiving groove, thereby reducing the interference of the contact member 210 caused by the excessive length of the first detection switch 310 extending into the receiving groove, and thus improving the stability and reliability of the deviation switch operation.

[0047] For example, the first detection switch 310 includes a proximity switch. A proximity switch is a non-contact sensor that detects the presence of an object to be detected (e.g., contact element 210) based on principles such as electromagnetic fields or optics.

[0048] For example, the proximity switch may include an electromagnetic proximity switch, and the contact 210 may be made of metal. When the contact 210 approaches the electromagnetic proximity switch (i.e., is in the detection position of the proximity switch), the contact 210 changes the surrounding electromagnetic field, causing a change in current induced in the receiving coil of the electromagnetic proximity switch, thereby triggering the electromagnetic proximity switch. In the case where the deviation switch includes a limit plate 500, the limit plate 500 may be made of plastic.

[0049] For example, the proximity switch may include a photoelectric proximity switch, which can detect the contact 210 by emitting and receiving a light beam (typically infrared light). When the contact 210 enters the path of the light beam (i.e., is in the detection position of the proximity switch), the receiver of the photoelectric proximity switch detects the reflected light, thereby triggering the photoelectric proximity switch. Where the deviation switch includes a limit plate 500, the limit plate 500 may be made of a transparent material.

[0050] It should be noted that the above description of proximity switches is merely exemplary, and the protection of this application is not limited to the contents listed above. Those skilled in the art can select the type of proximity switch according to the actual situation, as long as it can realize the technical principle of this application.

[0051] In one example, such as Figure 4 As shown, the inner wall of the receiving cavity 110 is provided with a limiting protrusion 120, and the outer wall of the contact member 210 is provided with a limiting groove 221. The limiting protrusion 120 and / or the limiting groove 221 extend along the axial direction of the seat 100, and the limiting protrusion 120 and the limiting groove 221 are adapted to each other.

[0052] The contact 210 is disposed within the receiving cavity 110. The limiting protrusion 120 and / or the limiting groove 221 extend along the axial direction of the base 100. The limiting protrusion 120 is adapted to the limiting groove 221 and is disposed within the limiting groove 221. In this way, the limiting protrusion 120 and the limiting groove 221 can slide relative to each other along the axial direction of the base 100, and can limit the rotation of the contact 210 relative to the inner wall of the receiving cavity 110, reduce the occurrence of contact 210 offset, improve the sliding stability of the contact 210, and thus improve the working stability and reliability of the deviation switch.

[0053] For example, such as Figure 4 and Figure 5 As shown, when the outer side wall of the contact member 210 is provided with a limiting groove 221, the end of the contact member 210 facing the bottom wall of the receiving cavity 110 is provided with a boss 220. The boss 220 extends radially along the seat body 100 and is provided with a limiting protrusion 120. The boss 220 can abut against the axial side wall at the opening to prevent the contact member 210 from falling out of the receiving cavity 110. The radial direction of the seat body 100 is perpendicular to the axial direction of the seat body 100.

[0054] The inner diameter of the receiving cavity 110 can be larger than the inner diameter of the opening. For example, the seat 100 includes a bottom shell 101 and an upper shell 102, which are connected. The bottom shell 101 encloses the receiving cavity 110, and the upper shell 102 encloses the opening. The axial sidewall of the opening can be the sidewall of the upper shell 102 facing the bottom shell 101.

[0055] When the contact 210 is reset or subjected to external force, it moves away from the receiving cavity 110. The end of the contact 210 facing the bottom wall of the receiving cavity 110 is provided with a boss 220. When the end of the contact 210 slides to the opening, the side wall at the opening position can prevent the boss 220 from continuing to move, thereby limiting the contact 210 from coming out of the receiving cavity 110, reducing the occurrence of the contact 210 separating from the seat 100, and improving the working stability and reliability of the deviation switch.

[0056] The boss 220 in this example not only has a limiting groove 221 that can cooperate with the limiting protrusion 120 to limit the rotation of the contact 210, but also can cooperate with the side wall at the opening to limit the contact 210 from dislodging from the receiving cavity 110, thereby improving the utilization rate of the boss 220, reducing the number of components in the deviation switch, and reducing costs.

[0057] In another example, the inner wall of the receiving cavity 110 is provided with a limiting groove, and the outer wall of the contact member 210 is provided with a limiting protrusion. The limiting groove and / or the limiting protrusion extend along the axial direction of the seat 100, and the limiting groove is adapted to the limiting protrusion.

[0058] The contact 210 is disposed within the receiving cavity 110. The limiting protrusion and / or limiting groove extend along the axial direction of the base 100. The limiting protrusion and the limiting groove are adapted to each other. The limiting protrusion is disposed within the limiting groove. In this way, the limiting protrusion and the limiting groove can slide relative to each other along the axial direction of the base 100, and can limit the rotation of the contact 210 relative to the inner wall of the receiving cavity 110, reduce the occurrence of contact 210 offset, improve the sliding stability of the contact 210, and thus improve the working stability and reliability of the deviation switch.

[0059] For example, if a limiting protrusion is provided on the outer side wall of the contact member 210, the limiting protrusion is located at the end of the contact member 210 facing the bottom wall of the receiving cavity 110, and the limiting protrusion can abut against the axial side wall at the opening to restrict the contact member 210 from dislodging from the receiving cavity 110. The bottom wall of the receiving cavity 110 is disposed opposite to the opening.

[0060] When the contact 210 is reset or subjected to external force, it moves away from the receiving cavity 110. The limiting protrusion is located at the end of the contact 210 facing the bottom wall of the receiving cavity 110. In this way, when the end of the contact 210 slides to the opening, the side wall at the opening position can hinder the movement of the limiting protrusion, thereby limiting the contact 210 from coming out of the receiving cavity 110, so as to reduce the occurrence of the contact 210 separating from the seat 100 and improve the working stability and reliability of the deviation switch.

[0061] In this way, the limiting protrusion set in this example can not only cooperate with the limiting groove to restrict the rotation of the contact 210, but also cooperate with the side wall at the opening to restrict the contact 210 from dislodging from the receiving cavity 110, thereby improving the utilization rate of the limiting protrusion, reducing the number of components in the deviation switch, and reducing costs.

[0062] In one example, such as Figure 1 and Figure 3 As shown, the bottom wall of the receiving cavity 110 may be provided with a sleeve 130, and the contact assembly 200 may also include a connecting rod 230. The connecting rod 230 is connected to the wall surface of the contact member 210 facing the bottom wall of the receiving cavity 110. The connecting rod 230 is located inside the sleeve 130 and can slide relative to the sleeve 130 along the axial direction of the seat 100.

[0063] A connecting rod 230 is disposed on the wall surface of the contact member 210 facing the bottom wall of the receiving cavity 110, and a sleeve 130 is disposed on the bottom wall of the receiving cavity 110. The connecting rod 230 and the sleeve 130 are disposed opposite to each other. The connecting rod 230 and the sleeve 130 extend axially along the base 100, and the connecting rod 230 is disposed inside the sleeve 130. The connecting rod 230 can slide relative to the sleeve 130, which can improve the stability of the sliding of the contact member 210 relative to the receiving cavity 110, reduce the occurrence of displacement or skew of the contact member 210 during the sliding process, and prevent the contact member 210 from sliding under the drive of the conveyor belt, thereby improving the working stability and reliability of the contact member 210, and thus improving the working stability and reliability of the deviation switch.

[0064] In another example, the bottom wall of the receiving cavity 110 may be provided with a connecting rod, and the contact assembly 200 may also include a sleeve connected to the wall surface of the contact member 210 facing the bottom wall of the receiving cavity 110. The sleeve is sleeved on the outside of the connecting rod and is slidable relative to the connecting rod along the axial direction of the seat 100.

[0065] A sleeve is disposed on the wall surface of the contact 210 facing the bottom wall of the receiving cavity 110, and a connecting rod is disposed on the bottom wall of the receiving cavity 110. The sleeve and the connecting rod are disposed opposite to each other. The connecting rod and the sleeve extend axially along the base 100, and the connecting rod is disposed inside the sleeve. The connecting rod can slide relative to the sleeve, which can improve the stability of the contact 210 sliding relative to the receiving cavity 110, reduce the occurrence of displacement or skew of the contact 210 during sliding, and prevent interference with the sliding of the contact 210 under the drive of the conveyor belt. This improves the working stability and reliability of the contact 210, thereby improving the working stability and reliability of the deviation switch.

[0066] For example, such as Figure 1As shown, the belt misalignment switch also includes an elastic element 600, with its two ends connected to the receiving cavity 110 and the contact element 210, respectively. The elastic element 600 can provide a force to the contact element 210 away from the receiving cavity 110, so as to reset the contact element 210 when the conveyor belt is not misaligned or is operating normally. The elastic element 600 may include, for example, a compression spring, and the elastic element 600 may be sleeved on the outside of the connecting rod 230 and / or the sleeve 130.

[0067] For example, such as Figure 1 and Figure 3 As shown, the deviation switch may also include a seal 800, which is disposed between the side wall of the opening and the contact 210, and the contact 210 is slidable relative to the seal 800.

[0068] In this way, the seal 800 can seal the opening and the receiving cavity 110, reducing the entry of moisture, dust, or impurities from the external environment into the receiving cavity 110, thereby increasing the service life of the components inside the receiving cavity 110 and thus extending the service life of the misalignment switch. The contact 210 can slide relative to the seal 800 to ensure that the contact 210 can operate normally.

[0069] For example, the seal 800 may include a sealing ring, which may be fixed to the side wall of the opening.

[0070] For example, such as Figures 1 to 3 As shown, the side wall of the receiving cavity 110 may be provided with an installation through hole, and the deviation switch may also include a vent valve 700. The vent valve 700 is provided in the installation through hole, and the receiving cavity 110 can communicate with the outside through the vent valve 700.

[0071] The vent valve 700 is located in the mounting through hole. The receiving cavity 110 is connected to the outside through the vent valve 700. The vent valve 700 is waterproof and dustproof, so as to reduce the entry of external moisture, dust or impurities into the receiving cavity 110, thereby improving the service life of the components in the receiving cavity 110 and thus improving the service life of the deviation switch.

[0072] Furthermore, when the contact member 210 slides towards the receiving cavity 110, the gas inside the receiving cavity 110 can be discharged through the vent valve 700. This reduces the possibility that, if the space enclosed by the receiving cavity 110 and the contact member 210 becomes smaller, and the gas inside the receiving cavity 110 cannot be discharged, the gas inside the receiving cavity 110 will be compressed during the sliding process of the contact member 210, leading to an increase in the sliding resistance of the contact member 210, or even preventing the contact member 210 from sliding under the drive of the conveyor belt. When the contact member 210 slides away from the receiving cavity 110, the space inside the receiving cavity 110 increases, and external gas can enter the receiving cavity 110 through the vent valve 700. This reduces the possibility that, if the space enclosed by the receiving cavity 110 and the contact member 210 increases, and the gas inside the receiving cavity 110 cannot be replenished, the pressure inside the receiving cavity 110 will decrease during the sliding process of the contact member 210, leading to an increase in the sliding resistance of the contact member 210, or even preventing the contact member 210 from resetting.

[0073] By setting the vent valve 700, the internal and external air pressure of the receiving cavity 110 can be balanced during the sliding process of the contact member 210, reducing the occurrence of situations that hinder the sliding of the contact member 210 and improving the stability and reliability of the sliding of the contact member 210.

[0074] For example, such as Figures 1 to 3 As shown, the detection assembly 300 also includes a second detection switch 320, which is disposed on the side wall of the receiving cavity 110 along the axial direction of the seat 100. The second detection switch 320 is spaced apart from the first detection switch 310.

[0075] This belt misalignment switch has multiple detection switches, which can perform multi-level detection of belt deviation during the operation of the belt conveyor. The second detection switch 320 can be fixedly installed in the receiving cavity 110. Similar to the first detection switch 310, the second detection switch 320 can also have locked and unlocked states to adjust the travel of the contact member 210 to trigger the second detection switch 320, which will not be described in detail here.

[0076] Taking the second detection switch 320 fixedly mounted on the side wall of the receiving cavity 110 as an example, the placement positions of the first detection switch 310 and the second detection switch 320 will be explained. For example, as Figures 1 to 3As shown, the maximum travel of the contact 210 is 40mm. The second detection switch 320 can be positioned at 20% of the total travel of the contact 210, meaning that the second detection switch 320 can be triggered when the contact 210 moves 8mm, causing it to output a first-level deviation signal. The first detection switch 310 can move within 60% to 100% of the total travel in the unlocked state. For example, in one case, after moving the first detection switch 310 to 70% of the total travel, the first detection switch 310 is locked by the limit component 400. This way, the first detection switch 310 can be triggered when the contact 210 moves 28mm, causing it to output a second-level deviation signal. In another case, the first detection switch 310 can be moved to 100% of the total travel, and then locked by the limit component 400. This way, the first detection switch 310 can be triggered when the contact 210 moves 40mm, causing it to output a second-level deviation signal.

[0077] For example, the first detection switch 310 can move within 10% to 30% of the total stroke when it is in the unlocked state, and the second detection switch 320 can be set at the position where the contact 210 has moved to 90% of the total stroke, so that the first detection switch 310 outputs a first-level deviation signal and the second detection switch 320 outputs a second-level deviation signal.

[0078] It is understood that the above description of the setting method of the first detection switch 310 and the second detection switch 320 is merely exemplary. The setting position of the first detection switch 310, the setting position of the second detection switch 320, and whether the detection range of the second detection switch 320 is variable can be set according to the experience of those skilled in the art, or according to the actual usage requirements of the deviation switch, as long as the technical principle of this application can be realized, and no specific limitation is made here.

[0079] In the description of this application, it should be understood that the following terms, such as “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential,” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the content or structure of the present invention.

[0080] It should be noted that the order of the embodiments described above is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments.

[0081] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0082] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0083] In this application, unless otherwise stated, directional terms such as "up" and "down" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" are generally used in relation to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this application.

[0084] The above description is merely an exemplary embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope described in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A belt misalignment switch, characterized in that, include: The seat body has an opening and a receiving cavity, and the opening communicates with the receiving cavity; A contact assembly includes a contact element, a portion of which passes through the opening and is disposed within the receiving cavity, and is slidable relative to the receiving cavity along the axial direction of the seat. The detection component includes a first detection switch, which is disposed on the side wall of the receiving cavity. When the contact member slides to the detection position of the first detection switch, the contact member can trigger the first detection switch. as well as A limiting component, connected to the first detection switch, is used to lock or unlock the first detection switch; When the limiting component locks the first detection switch, the limiting component limits the first detection switch to the side wall of the receiving cavity; when the limiting component unlocks the first detection switch, the first detection switch can slide relative to the side wall of the receiving cavity along the axial direction of the seat.

2. The belt misalignment switch according to claim 1, characterized in that, in, The side wall of the receiving cavity is provided with a sliding hole, which extends along the axial direction of the seat, and part of the first detection switch passes through the sliding hole; The limiting component includes a first limiting member and a second limiting member. The first limiting member is located on the side of the sliding hole facing the receiving cavity, and the second limiting member is located on the side of the sliding hole away from the receiving cavity. The width of the first limiting member and the width of the second limiting member are respectively greater than the width of the sliding hole. The first limiting member and the second limiting member are respectively sleeved on the outside of the first detection switch and are respectively threaded to the first detection switch.

3. The belt misalignment switch according to claim 2, characterized in that, Also includes: A limiting plate is disposed within the receiving cavity. The limiting plate has a sliding groove that extends axially along the seat body and communicates with the sliding hole. A first detection switch, part of which passes through the sliding hole, is located within the sliding groove. A first limiting member is located within the sliding groove, and the sidewall of the sliding groove can restrict the rotation of the first limiting member.

4. The belt misalignment switch according to claim 1, characterized in that, in, The first detection switch includes a proximity switch.

5. The belt misalignment switch according to claim 1, characterized in that, in, The inner wall of the receiving cavity is provided with a limiting protrusion, and the outer wall of the contact member is provided with a limiting groove. The limiting protrusion and / or the limiting groove extend along the axial direction of the seat body, and the limiting protrusion is adapted to the limiting groove; or... The inner wall of the receiving cavity is provided with a limiting groove, and the outer wall of the contact member is provided with a limiting protrusion. The limiting groove and / or the limiting protrusion extend along the axial direction of the seat body, and the limiting groove is adapted to the limiting protrusion.

6. The belt misalignment switch according to claim 5, characterized in that, in, When the limiting protrusion is provided on the outer side wall of the contact member, the limiting protrusion is located at the end of the contact member facing the bottom wall of the receiving cavity, and the limiting protrusion can abut against the axial side wall at the opening to restrict the contact member from coming out of the receiving cavity; When the limiting groove is provided on the outer side wall of the contact member, the end of the contact member facing the bottom wall of the receiving cavity is provided with a boss, the boss extends radially along the seat body, the boss is provided with the limiting protrusion, and the boss can abut against the axial side wall at the opening to restrict the contact member from coming out of the receiving cavity.

7. The belt misalignment switch according to any one of claims 1 to 6, characterized in that, in, The bottom wall of the receiving cavity is provided with a sleeve, and the contact assembly further includes a connecting rod. The connecting rod is connected to the wall surface of the contact member facing the bottom wall of the receiving cavity. The connecting rod is disposed inside the sleeve and along the axial direction of the seat body. The connecting rod is slidable relative to the sleeve; or... The bottom wall of the receiving cavity is provided with a connecting rod, and the contact assembly further includes a sleeve. The sleeve is connected to the contact member facing the bottom wall of the receiving cavity. The sleeve is sleeved on the outside of the connecting rod and along the axial direction of the seat body. The sleeve can slide relative to the connecting rod.

8. The belt misalignment switch according to any one of claims 1 to 6, characterized in that, in, The side wall of the receiving cavity is provided with a mounting through hole, and the deviation switch also includes a vent valve, which is located in the mounting through hole, and the receiving cavity can communicate with the outside through the vent valve.

9. The belt misalignment switch according to any one of claims 1 to 6, characterized in that, The detection component also includes: The second detection switch is located on the side wall of the receiving cavity along the axial direction of the seat body, and is spaced apart from the first detection switch.

10. The belt misalignment switch according to any one of claims 1 to 6, characterized in that, Also includes: A seal is disposed between the sidewall of the opening and the contact member, the contact member being slidable relative to the seal.

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