A belt breakage detection device, a lifting device and a warehousing and logistics system

Abstract

The present invention belongs to the field of logistics technology, and specifically discloses a belt break detection device, a lifting device and a warehousing logistics system. The belt break detection device includes a mounting frame, a detection sensor and a belt connection assembly. The mounting frame is used for connecting with a lifting platform; the detection sensor is installed on the mounting frame and has a triggered state and a non-triggered state; the belt connection assembly is slidably arranged on the mounting frame and is used for connecting with a transmission belt. The belt connection assembly can slide vertically relative to the mounting frame after the transmission belt breaks, so that the detection sensor can switch between the triggered state and the non-triggered state. The lifting device includes a lifting platform, a transmission belt and a belt break detection device. The lifting platform is connected with the mounting frame, and the belt connection assembly is connected with the transmission belt. The warehousing logistics system includes the above-mentioned lifting device. The belt break detection device, the lifting device and the warehousing logistics system disclosed by the present invention can improve the convenience and reliability of belt break detection and reduce the detection cost.

Description

Technical Field

[0001] The present invention relates to the technical field of logistics, and particularly to a belt breakage detection device, a lifting device and a warehousing logistics system. Background Art

[0002] In the process of warehousing logistics, the processes of stacking, handling or loading and unloading of goods may all involve the lifting operation of goods. At the same time, for the shuttle car conveying system, the shuttle car also needs to be lifted to different floors for picking and placing goods. A hoist is a device used in a warehousing logistics system to lift a shuttle car or goods, and it has a load-carrying platform for carrying goods or a shuttle car and a lifting drive mechanism for vertically lifting the load-carrying platform.

[0003] The lifting drive mechanism of the existing hoist usually uses a belt drive method to lift the load-carrying platform, that is, a lifting belt is used to connect the load-carrying platform. For a hoist using belt drive, there will be a problem of belt breakage during the operation of the hoist, which may cause the load-carrying platform to fall. To reduce the risk of the load-carrying platform falling caused by belt breakage, the existing hoist usually uses a double lifting belt or multiple lifting belts to synchronously lift the load-carrying platform. However, during the lifting process using two or more lifting belts, if one of the lifting belts breaks while the other lifting belts are still running, it will also cause the load-carrying platform to tilt due to unbalanced force, affecting the safety and reliability of the hoist. Therefore, a belt breakage detection device needs to be provided on the hoist so that other lifting belts can be stopped in time after the belt breaks.

[0004] The prior art provides a belt breakage detection device, which includes a transmitting end and a receiving end. The transmitting end and the receiving end are respectively located on opposite sides of the lifting belt. If the receiving end does not receive the laser signal, it means that the lifting belt is not broken. For this kind of belt breakage detection device, since the transmitting end and the receiving end can only detect local signals, the belt breakage detection device can only detect whether the lifting belt at the installation position is broken, and the detection reliability is low. If multiple groups of belt breakage detection devices are arranged at intervals along the length direction of the lifting belt for multi-point coverage, it will increase the detection cost and is not conducive to the installation of the belt breakage detection device. Summary of the Invention

[0005] An object of an embodiment of the present invention is to provide a belt breakage detection device to reduce the installation difficulty of the belt breakage detection device, improve the detection reliability of the belt breakage detection device, and reduce the detection cost.

[0006] Another object of an embodiment of the present invention is to provide a lifting device to improve the operation safety and reliability of the lifting device.

[0007] Another object of the embodiments of the present invention is to provide a warehousing and logistics system to improve the operating safety of the warehousing and logistics system and reduce the cost of the warehousing and logistics system.

[0008] To achieve the above object, the present invention adopts the following technical solutions:

[0009] A belt breakage detection device includes:

[0010] A mounting bracket for connecting with a lifting platform;

[0011] A detection sensor mounted on the mounting bracket and having a triggered state and a non-triggered state;

[0012] A belt connection component slidably arranged on the mounting bracket and used for connecting with a transmission belt. The belt connection component can vertically slide relative to the mounting bracket after the transmission belt breaks, so that the detection sensor switches between the triggered state and the non-triggered state.

[0013] As an optional technical solution of the belt breakage detection device, the belt breakage detection device further includes an elastic member. The elastic member is in a pre-compressed or pre-stretched state when the transmission belt is in a normal operation state, and the elastic member applies a downward restoring force to the belt connection component after the transmission belt breaks.

[0014] As an optional technical solution of the belt breakage detection device, the belt breakage detection device further includes a limiting member for limiting the deformation degree of the elastic member in the pre-compressed or pre-stretched state.

[0015] As an optional technical solution of the belt breakage detection device, the belt connection component includes a detachable connection base and a clamping plate. The connection base is vertically slidably arranged on the mounting bracket, and the connection base cooperates with the clamping plate to clamp the transmission belt.

[0016] As an optional technical solution of the belt breakage detection device, the transmission belt is a toothed belt, and convex teeth are provided on one side of the clamping plate facing the connection base and / or one side of the connection base facing the clamping plate. The convex teeth are adapted to the tooth grooves of the toothed belt.

[0017] As an optional technical solution of the belt breakage detection device, a positioning groove is formed on one side of the connection base facing the clamping plate. The positioning groove penetrates the upper and lower ends of the connection base. The width of the positioning groove is equal to the width of the transmission belt, and the depth of the positioning groove is less than the thickness of the transmission belt.

[0018] As an optional technical solution of the belt breakage detection device, a vertical guide shaft is fixedly provided on the mounting bracket, and the belt connection component is slidably sleeved on the guide shaft.

[0019] As an alternative technical solution of a tape break detection device, the tape connection assembly includes a connection base, a guiding hole is penetratingly formed in the connection base, a lubricating bushing is press-fitted in the guiding hole, and a guiding shaft is slidably inserted through the lubricating bushing.

[0020] As an alternative technical solution of a tape break detection device, the mounting frame has a mounting cavity penetrating in a first direction, a part of the tape connection assembly is located in the mounting cavity and is slidably connected to the mounting frame, a part of the tape connection assembly extends out of the mounting cavity and is used for connecting with the transmission belt, and the first direction is perpendicular to the vertical direction.

[0021] As an alternative technical solution of a tape break detection device, the tape break detection device further includes an upper limit member for defining a minimum distance between the top wall of the mounting cavity and the tape connection assembly; and / or,

[0022] The tape break detection device further includes a lower limit member for defining a minimum distance between the bottom wall of the mounting cavity and the tape connection assembly.

[0023] As an alternative technical solution of a tape break detection device, the upper limit member is a limit rod, and the limit rod is screwed through the top of the mounting frame and the lower end extends into the mounting cavity.

[0024] As an alternative technical solution of a tape break detection device, the detection sensor is installed on the outer side of the lower end of the mounting frame and is located below the tape connection assembly. After the transmission belt breaks, the tape connection assembly can slide downward relative to the mounting frame to abut against the triggering part of the detection sensor, so that the detection sensor is switched to the triggering state.

[0025] As an alternative technical solution of a tape break detection device, the tape connection assembly includes a connection base and a triggering piece. The connection base is slidably connected to the mounting frame. The triggering piece is detachably connected to one side of the connection base. The other side of the connection base is used for connecting with the transmission belt. The triggering piece extends out of the mounting cavity and can abut against the triggering part.

[0026] A lifting device includes a frame, a lifting platform installed on the frame, and a belt-type lifting driving mechanism. The belt-type lifting driving mechanism includes a transmission belt. The lifting device further includes the tape break detection device as described above. The lifting platform is connected to the transmission belt through the tape break detection device, and the lifting platform is connected to the mounting frame, and the tape connection assembly is connected to the transmission belt.

[0027] A warehousing and logistics system includes the lifting device as described above.

[0028] The beneficial effects of the present invention are as follows:

[0029] For the belt breakage detection device provided by the embodiment of the present invention, the judgment of whether a belt break occurs depends on whether the conveyor belt provides a pulling force to the belt connection component. If the conveyor belt cannot provide a pulling force to the belt drive component, the belt connection component will slide relative to the mounting bracket to trigger a change in the signal of the detection sensor. No matter where the conveyor belt breaks, it will cause the conveyor belt to be unable to effectively provide a pulling force to the belt drive component. That is, the belt breakage detection device can detect belt breaks at any location on the conveyor belt, so it can reliably detect whether a belt break occurs in the conveyor belt, improve the detection reliability of the belt breakage detection device, thereby improving the use safety and reliability of the lifting device, and the detection cost is relatively low; at the same time, since the belt breakage detection device can perform belt breakage detection and also plays a role in connecting the conveyor belt and the lifting platform, it can reduce the overall cost of the lifting device and simplify the overall structure of the lifting device.

[0030] The lifting device provided by the embodiment of the present invention can improve the operation safety and reliability of the lifting device by adopting the above-mentioned belt breakage detection device, simplify the structure of the lifting device, and reduce the cost of the lifting device.

[0031] The warehousing and logistics system provided by the embodiment of the present invention can improve the operation safety and reliability of the warehousing and logistics system and reduce the operation cost of the warehousing and logistics system by adopting the above-mentioned lifting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a partial structural schematic diagram of the lifting device provided by the embodiment of the present invention;

[0033] Figure 2 is a front view schematic diagram of the connection between the belt breakage detection device and the conveyor belt provided by the embodiment of the present invention;

[0034] Figure 3 is an axonometric view of the connection between the belt breakage detection device and the conveyor belt provided by the embodiment of the present invention;

[0035] Figure 4 is a structural schematic diagram of the belt breakage detection device provided by the embodiment of the present invention;

[0036] Figure 5 is a connection structural schematic diagram of the belt connection component and the conveyor belt provided by the embodiment of the present invention;

[0037] Figure 6 is a side view of the belt connection component provided by the embodiment of the present invention.

[0038] The markings in the figure are as follows:

[0039] 10. Belt breakage detection device; 20. Conveyor belt; 30. Lifting platform;

[0040] 1. Mounting bracket; 11. Mounting top plate part; 12. Mounting bottom plate part; 13. Mounting side plate part; 14. Mounting cavity;

[0041] 2. Belt connection assembly; 21. Connection base; 211. Sliding seat; 212. Belt connection plate; 22. Clamping plate; 221. Convex teeth; 23. Trigger piece; 231. Fixed plate part; 232. Trigger plate part; 24. Lubricating bushing;

[0042] 3. Elastic member; 4. Detection sensor; 41. Housing; 42. Trigger part; 5. Fixed seat; 6. Limiting member; 61. Limiting rod; 62. Locking nut; 7. Guide shaft; 71. Main shaft part; 72. Insertion shaft part; 8. End cover; 81. Bushing part; 82. Limiting plate part. Detailed implementation manners

[0043] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the convenience of description, only parts related to the present invention are shown in the drawings, rather than all structures.

[0044] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; 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 elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0045] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above and to the right", and "on the top" of the second feature includes the first feature being directly above and diagonally above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below and to the left", and "under the bottom" of the second feature includes the first feature being directly below and diagonally below the second feature, or simply indicating that the horizontal height of the first feature is lower than that of the second feature.

[0046] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0047] As Figure 1 shown, this embodiment provides a lifting device, which can be applied to a warehousing and logistics system to realize the lifting of an object. Among them, the object can be a shuttle car, that is, to realize the lifting of the shuttle car on different platforms, or the object can directly be goods to realize operations such as palletizing and stacking of goods. This embodiment does not limit the object lifted by the lifting device and the specific application scenario.

[0048] The lifting device includes a frame, a lifting drive mechanism, and a lifting platform 30. Among them, the lifting platform 30 is used to carry the object to be lifted. The lifting platform 30 is installed on the frame in a liftable manner. The lifting drive mechanism is used to drive the lifting platform 30 to lift. The lifting drive mechanism is a belt-type lifting drive mechanism, which includes a drive motor and a belt drive assembly. The belt drive assembly includes a driving pulley and a driven pulley arranged at intervals in the height direction, and a transmission belt 20 wound around the driving pulley and the driven pulley. The drive motor is fixedly installed on the frame, and both the driving pulley and the driven pulley are rotatably installed on the frame. The transmission belt 20 is connected to the lifting platform 30.

[0049] At least one set of belt drive assemblies is arranged on each of the opposite sides of the lifting platform 30. The transmission belt 20 of each set of belt drive assemblies is connected to the lifting platform 30 to realize the synchronous drive of the lifting platform 30 and improve the running safety and force balance of the lifting platform 30. Several sets of belt drive assemblies can be synchronously driven by the same drive motor with a synchronous transmission structure, or can be driven by different drive motors respectively. The present invention does not limit this.

[0050] In the present invention, the specific structures of the frame, the belt-type lifting drive mechanism, and the lifting platform 30 can refer to the prior art. This is not the focus of the present invention and will not be elaborated here.

[0051] To detect whether the transmission belt 20 breaks during operation, the lifting device further includes a belt break detection device 10 and a controller. Each transmission belt 20 is connected to the lifting platform 30 through the belt break detection device 10. When the corresponding transmission belt 20 breaks, the belt break detection device 10 can send the detected information to the controller. After receiving the belt break information, the controller controls the drive motor of the lifting drive mechanism to stop working, that is, controls the lifting platform 30 to stop moving, and avoids the lifting platform 30 from tilting.

[0052] Specifically, as Figure 2 and Figure 3 shown, the belt breakage detection device 10 includes a mounting frame 1, a detection sensor 4, and a belt connection assembly 2. Among them, the mounting frame 1 is connected to the lifting platform 30; the detection sensor 4 is installed on the mounting frame 1 and has a triggered state and a non-triggered state; the belt connection assembly 2 is slidably arranged on the mounting frame 1 and is connected to the transmission belt 20. The belt connection assembly 2 can slide vertically relative to the mounting frame 1 after the transmission belt 20 breaks, so that the detection sensor 4 switches between the triggered state and the non-triggered state.

[0053] For the belt breakage detection device 10 provided in this embodiment, by connecting the belt connection assembly 2 to the transmission belt 20 and connecting the mounting frame 1 to the lifting platform 30, the transmission belt 20 can be connected to the lifting platform 30 through the belt breakage detection device 10, without an additional structure for connecting the transmission belt 20 and the lifting platform 30, simplifying the overall structure of the lifting device. When the transmission belt 20 is running normally, the conveyor belt 20 drives the lifting platform 30 to lift and lower synchronously through the belt breakage detection device 10. At this time, the belt connection assembly 2 is supported and lifted by the conveyor belt 20 to maintain its relative position with the mounting frame 1; when the conveyor belt 20 breaks, the conveyor belt 20 cannot lift the belt connection assembly 2, resulting in the belt connection assembly 2 sliding downward relative to the mounting frame 1 and triggering the detection sensor 4 to switch between the triggered state and the non-triggered state, so that the controller can judge whether a belt breakage occurs according to the signal of the detection sensor 4, that is, control the driving motor to stop running.

[0054] That is, for the belt breakage detection device 10 provided in this embodiment, the judgment of whether a belt breakage occurs depends on whether the conveyor belt provides a lifting force to the belt connection assembly 2. If the transmission belt 20 cannot provide a lifting force to the belt transmission assembly 2, the belt connection assembly 2 will slide relative to the mounting frame 1 to trigger a change in the signal of the detection sensor 4. No matter where the transmission belt 20 breaks, it will cause the transmission belt 20 to be unable to effectively provide a lifting force to the belt transmission assembly 2, that is, the belt breakage detection device 10 can detect the belt breakage at any position of the transmission belt 20. Therefore, it can reliably detect whether the transmission belt 2 breaks, improve the detection reliability of the belt breakage detection device 10, thereby improving the use safety and reliability of the lifting device, and the detection cost is relatively low; at the same time, since the belt breakage detection device 10 can perform belt breakage detection and also play the role of connecting the transmission belt 20 and the lifting platform 30, it can reduce the overall cost of the lifting device and simplify the overall structure of the lifting device.

[0055] In order to facilitate the installation of the belt connection assembly 2 and the detection sensor 4 on the mounting frame 1, the mounting frame 1 has an installation cavity 14 that penetrates along the first direction, the belt connection assembly 2 is partially located in the installation cavity 14 and is slidably connected to the mounting frame 1, and the belt connection assembly 2 partially extends out of the installation cavity 14 and is used to connect with the transmission belt 20, and the first direction is perpendicular to the vertical direction, and the first direction is perpendicular to the belt surface of the transmission belt 20. The setting of the installation cavity 14 can provide protection for the belt connection assembly 2 and other structures and reduce external scratches; at the same time, the setting of the installation cavity 14 also makes it easier to achieve the sliding connection and sliding limit of the belt connection assembly 2 on the mounting frame 1.

[0056] The mounting frame 1 is preferably a rectangular frame structure formed by four mounting plate portions, and the internal space of the rectangular frame structure forms the mounting cavity 14. This type of mounting frame 1 has a simple structure, is easy to process, and is easy to connect to the lifting platform 30, while also ensuring that the mounting frame 1 has sufficient structural strength and rigidity. In other embodiments, the mounting frame 1 may also be a U-shaped structure or other frame-type structures.

[0057] Specifically, the four mounting plate portions include a mounting top plate portion 11 and a mounting bottom plate portion 12 spaced apart from each other, and two mounting side plate portions 13 vertically connected to the mounting top plate portion 11 and the mounting bottom plate portion 12 at corresponding ends, and the two mounting side plate portions 13 are arranged opposite to each other and spaced apart along the second direction. The mounting top plate portion 11 and the mounting bottom plate portion 12 are both disposed in the vertical direction, and the mounting side plate portions 13 are perpendicular to the second direction, and one of the mounting side plate portions 13 is detachably connected to the lifting platform 30.

[0058] In this embodiment, the mounting top plate portion 11, the mounting bottom plate portion 12 and one of the mounting side plate portions 13 are integrally formed into a U-shaped structure, and the other mounting side plate portion 13 is detachably connected to the opening of the U-shaped structure to facilitate the disassembly and assembly of other structures in the mounting cavity 14. In other embodiments, each mounting plate portion may also be welded or connected by a detachable connection method such as screws, or the mounting frame 1 may also be integrally formed, and the present invention is not limited thereto.

[0059] Furthermore, the broken belt detection device 10 further includes an upper limit stopper, which is used to limit the minimum distance between the top wall of the installation cavity 14 (i.e., the lower surface of the installation top plate portion 11) and the belt connection component 2; and / or, the broken belt detection device further includes a lower limit stopper, which is used to limit the minimum distance between the bottom wall of the installation cavity 14 (i.e., the upper surface of the installation bottom plate portion 12) and the belt connection component 2. By providing the upper limit stopper, it is possible to prevent the mounting frame 1 from squeezing the belt connection component 2 under the gravity of the lifting platform 30; by providing the lower limit stopper, it is possible to prevent the belt connection component 2 from having a hard collision with the mounting frame 1 during the process of sliding downward relative to the mounting frame 1.

[0060] like Figure 2 andFigure 3 As shown, the belt connection assembly 2 includes a connection base 21 and a clamping plate 22 that are detachably connected. The connection base 21 is slidably disposed in the installation cavity 14, and the clamping plate 22 is located outside the installation cavity 14. The transmission belt 20 is clamped between the connection base 21 and the clamping plate 22 to improve the connection convenience between the belt connection assembly 2 and the transmission belt 20.

[0061] As Figure 2 and Figure 3 shown, further, the connection base 21 includes a sliding seat 211 and a belt connection plate 212. The sliding seat 211 is located in the installation cavity 14 and is slidably connected to the installation frame 1. The belt connection plate 212 is connected to one side of the sliding seat 211 along the first direction and is disposed opposite to the clamping plate 22. The transmission belt 20 is clamped between the belt connection plate 212 and the clamping plate 22. This structural setting of the connection base 21 can improve the connection convenience between the clamping plate 22 and the connection base 21, increase the contact area between the clamping plate 22 and the connection base 21, thereby increasing the contact area between the belt connection assembly 2 and the transmission belt 20, and improving the connection reliability with the transmission belt 20.

[0062] As Figure 6 shown, preferably, the transmission belt 20 is a single-sided toothed belt. A plurality of convex teeth 221 are provided on the surface of the clamping plate 22 facing the belt connection plate 212 or on the surface of the belt connection plate 212 facing the clamping plate 22 along the vertical direction. The convex teeth 221 extend along the second direction, and the shape of the convex teeth 221 matches the tooth grooves of the transmission belt 20 to achieve the biting between the clamping plate 22 or the belt connection plate 212 and the transmission belt 20, further improving the clamping stability of the transmission belt 20 between the clamping plate 22 and the belt connection plate 212 and preventing the transmission belt 20 and the clamping plate 22 from slipping. It can be understood that when the transmission belt 20 is a double-sided toothed belt, convex teeth are provided on both the belt connection plate 212 and the clamping plate 22.

[0063] A positioning groove is formed on the surface of the belt connection plate 212 facing the clamping plate 22. The positioning groove penetrates through the upper and lower ends of the belt connection plate 212. The groove width of the positioning groove along the second direction is equal to the bandwidth of the transmission belt 20, and the groove depth of the positioning groove is less than the belt thickness of the transmission belt 20. The transmission belt 20 is clamped between the bottom of the positioning groove and the clamping plate 22. The setting of the positioning groove can, on the one hand, achieve the positioning of the connection of the transmission belt 20 and ensure the installation reliability, and on the other hand, can also increase the contact area between the belt connection assembly 2 and the transmission belt 20, and improve the connection reliability between the belt connection assembly 2 and the transmission belt 20.

[0064] The splint 22 and the belt connecting plate 212 are preferably connected by threads to improve the connection stability. Specifically, first connection holes are provided on opposite sides of the splint 22 along the second direction, and at least two first connection holes are provided at intervals in the vertical direction; second connection holes are correspondingly provided on the belt connecting plate 212, and the second connection holes are arranged in one-to-one correspondence with the first connection holes. One of the first connection holes and the second connection holes is a threaded hole, and the other is a through hole, and the splint 22 and the belt connecting plate 212 are connected by a threaded member passing through the threaded hole and the through hole.

[0065] As Figure 5 shown, to improve the sliding connection reliability and smoothness of the belt connection assembly 2 and the mounting bracket 1, a guide shaft 7 is provided in the mounting bracket 1. The guide shaft 7 is arranged in the vertical direction, and the sliding seat 211 is slidably sleeved on the guide shaft 7. Thus, the connection base 21 can slide along the guide shaft 7, ensuring the reliability of the sliding direction of the connection base 21.

[0066] Preferably, at least two guide shafts 7 are arranged in parallel and at intervals to prevent the connection base 21 from deflecting relative to the mounting bracket 1. In this embodiment, two guide shafts 7 are arranged at intervals along the second direction to reduce the size of the broken belt detection device 10 in the first direction.

[0067] The upper and lower ends of the guide shaft 7 are respectively connected to the mounting top plate portion 11 and the mounting bottom plate portion 12. To facilitate the connection between the guide shaft 7 and the mounting bracket 1, the guide shaft 7 includes a main shaft portion 71 and a plug-in shaft portion 72 connected to the lower end of the main shaft portion 71. The shaft diameter of the plug-in shaft portion 72 is smaller than that of the main shaft portion 71. A slot is formed in the mounting bottom plate portion 12, and the plug-in shaft portion 72 is press-fitted into the slot to realize the connection between the guide shaft 7 and the mounting bottom plate portion 12. An installation opening is formed in the mounting top plate portion 11, and the upper end of the guide shaft 7 is inserted into the installation opening and connected to the mounting top plate portion 11.

[0068] Further, the upper end of the guide shaft 7 is connected to the mounting top plate portion 11 through an end cap 8. Specifically, the end cap 8 includes a shaft sleeve portion 81 and a limiting plate portion 82 connected to the shaft sleeve portion 81. The upper end of the main shaft portion 71 is inserted into the shaft sleeve portion 81 and the limiting plate portion 82 is located at the upper end of the main shaft portion 71. The shaft sleeve portion 81 is inserted into the installation opening, and the limiting plate portion 82 abuts against the upper end surface of the mounting top plate portion 11. The end cap 8 and the main shaft portion 71 are connected by a vertically inserted screw. The setting of the end cap 8 can improve the connection convenience between the guide shaft 7 and the mounting top plate portion 11 and simplify the processing of the guide shaft 7. However, it can be understood that other existing detachable connection structures capable of realizing the connection between the shaft and the plate can be applied to this embodiment, and the present invention makes no limitation thereto.

[0069] The part with the belt connection component 2 is located inside the installation cavity 14. The detection sensor 4 is installed outside the mounting bracket 1, which can prevent the sliding of the belt connection component 2 from colliding with the non-detection part of the detection sensor 4, reduce structural interference, and at the same time reduce the size of the mounting bracket 1. In other embodiments, the detection sensor 4 can also be located inside the installation cavity 14.

[0070] Further, a guiding hole is penetrated through the connection base 21, and a lubricating bushing 24 is press-fitted in the guiding hole. The guiding shaft 7 slidably penetrates through the lubricating bushing 24. The setting of the lubricating bushing 24 can improve the sliding smoothness between the guiding shaft 7 and the connection base 21, reduce the wear of the connection base 21 and the guiding shaft 7 while ensuring the guiding reliability of the connection base 21, and has a lower cost compared with using a linear bearing for guiding.

[0071] As Figure 2 and Figure 4 shown, the belt breakage detection device 10 further includes an elastic member 3. The elastic member 3 is in a pre-compressed or pre-stretched state when the transmission belt 20 is in a normal operation state, and the elastic member 3 applies a downward restoring force to the belt connection component 2 after the transmission belt 20 breaks. The setting of the elastic member 3 enables the connection base 21 to slide downward under the combined action of gravity and elastic force when the transmission belt 20 lacks support, thereby improving the switching speed of the belt breakage detection device 10 between the normal operation state and the belt breakage state, enabling the detection sensor 4 to respond quickly, improving the detection timeliness of the belt breakage detection device 10, and improving the use safety of the lifting device.

[0072] In this embodiment, the elastic member 3 is installed between the sliding seat 211 and the installation top plate portion 11, so that when the belt breakage detection device 10 is in a normal state, the elastic member 3 is in a pre-compressed state due to the gravity of the lifting platform 30. In other embodiments, the elastic member 3 can also be arranged between the sliding seat 211 and the installation bottom plate portion 12. At this time, when the belt breakage detection device 10 is in a normal state, the elastic member 3 is in a pre-stretched state due to the gravity of the lifting platform 30. After the transmission belt 20 breaks, the elastic force applied by the elastic member 3 to the connection base 21 is vertically downward, and together with the gravity, drives the connection base 21 to move downward.

[0073] Further, the elastic member 3 is sleeved on the guiding shaft 7 to better define the deformation direction of the elastic member 3, thereby ensuring the application direction of the restoring force of the elastic member 7. The elastic member 3 and the guiding shaft 7 are arranged in one-to-one correspondence.

[0074] Further, to prevent the elastic member 3 from being overly compressed under the gravity of the lifting stage 30 during the initial installation process, a limiting member 6 for restricting the compression degree of the elastic member 3 is provided on the mounting frame 1. In this embodiment, the limiting member 6 is the above-mentioned upper limiting member, that is, while restricting the minimum distance between the sliding seat 211 and the mounting base portion 11, the compression degree of the elastic member 3 is also restricted.

[0075] The limiting member 6 preferably includes a limiting rod 61 which is vertically arranged. A threaded hole is penetratingly formed in the mounting top plate portion 11. The limiting rod 61 is screwed through the threaded hole, and the lower end of the limiting rod 61 extends into the installation cavity 14. By providing the limiting rod 61, on the one hand, the convenience of setting the limiting member 6 on the mounting frame 1 can be improved, and on the other hand, the height of the lower end of the limiting rod 61 can be conveniently adjusted, so as to adjust the compression degree of the elastic member 3.

[0076] The limiting rod 61 is a screw rod, a lead screw or a bolt. And in this embodiment, when the lower end of the limiting rod 61 abuts against the sliding seat 211, the elastic member 3 is in a pre-compressed state, and the lifting device is in a normal use state.

[0077] The limiting member 6 further includes a locking nut 62 which is screwed and sleeved on the limiting rod 61, and one is provided on each of the opposite sides of the mounting top plate portion 61. The two locking nuts 62 are respectively in contact with the opposite two surfaces of the mounting top plate portion 61, thereby being able to more reliably lock the relative position of the limiting rod 61 and the mounting frame 1, and preventing the limiting rod 62 from sliding relative to the mounting frame 1 during the normal use of the belt break detection device 10.

[0078] As Figures 2 - 4 shown, in this embodiment, the detection sensor 4 is installed below the mounting frame 1, so that when the connection base 21 moves downward relative to the mounting frame 1, the detection sensor 4 can be triggered, that is, when the transmission belt 20 breaks, the belt break detection device 10 triggers the detection sensor 4 to make the detection sensor 4 in a triggered state, and when the transmission belt 20 is running normally, the detection sensor 4 is in a non-triggered state, thereby being able to prevent the detection sensor 4 from always being in the triggered state of sending signals and extending the service life of the detection sensor 4.

[0079] In other embodiments, it may also be that the detection sensor 4 is installed above the mounting frame 1, that is, when the belt break detection device 10 is in a normal state, the detection sensor 4 is always in a triggered state triggered by the belt connection assembly 2. After the transmission belt 20 breaks, the belt connection assembly 2 slides downward in a direction away from the detection sensor 4, thereby making the detection sensor 4 switch from the triggered state to the non-triggered state, and the controller stops the driving motor according to the signal of the detection sensor 4.

[0080] Preferably, the detection sensor 4 is a contact sensor. That is, after the belt connection assembly 2 contacts the detection sensor 4, the detection sensor 4 switches to the triggered state, thereby improving the reliability of detection and reducing the probability of detection errors caused by external factors. In other embodiments, the detection sensor 4 may also be a non-contact sensor, such as a photoelectric sensor, a distance sensor, etc., and the detection sensor 4 is triggered when the belt connection assembly 2 moves into the detection range of the detection sensor 4.

[0081] The detection sensor 4 includes a housing 41 and a trigger portion 42 located outside the housing 41. The trigger portion 42 is located on the side of the mounting bracket 1 away from the conveyor belt 20 and its top protrudes from the mounting base portion 12 to ensure that the belt connection assembly 2 can contact the trigger portion 42. The detection sensor 4 is preferably mounted on the mounting bracket 1 through a fixing seat 5. The fixing seat 5 is detachably connected to the mounting base portion 12, and the fixing seat 5 is detachably connected to the housing 41. The housing 41 is mounted on the side of the fixing seat 5 away from the conveyor belt 20. The fixing seat 5 is preferably a vertically arranged plate-like structure.

[0082] In this embodiment, the trigger portion 42 is a rod-shaped structure and can rotate relative to the housing 41 to prevent the belt connection assembly 2 from sliding relative to the detection sensor 4 after contacting the trigger portion 42, resulting in a hard collision with the trigger portion 42. Preferably, a roller is rotatably connected to the end of the trigger portion 42 for abutting against the belt connection assembly 2 to reduce the friction between the trigger portion 42 and the belt connection assembly 2. The detection sensor 4 can adopt existing mature products, and its specific structure and the principle that the action of the trigger portion 42 causes the detection sensor 4 to switch between the triggered state and the non-triggered state are all prior arts and will not be elaborated here.

[0083] Preferably, the belt connection assembly 2 further includes a trigger piece 23. The trigger piece 23 is detachably connected to the side of the sliding seat 211 away from the conveyor belt 20 and extends outside the mounting cavity 14. The trigger piece 23 can contact the trigger portion 42. By providing the trigger piece 23, while ensuring the contact between the belt connection assembly 2 and the detection sensor 4, the size of the connection base 21 can be reduced, thereby reducing the weight of the belt break detection device 10.

[0084] The trigger piece 23 preferably includes a fixing plate portion 231 and a trigger plate portion 232 that are vertically connected. The fixing plate portion 231 is vertically arranged and connected to the side surface of the sliding seat 211, and the trigger plate portion 232 is horizontally arranged and can contact the trigger portion 42. This structural setting of the trigger piece 23 can improve the connection convenience between the trigger piece 23 and the sliding seat 211, and at the same time enable the trigger piece 23 to have elastic deformation, avoiding hard extrusion of the trigger portion 42 by the trigger piece 23 after the trigger piece 23 contacts the trigger portion 42, improving the protection of the detection sensor 4 and the reliability of use of the detection sensor 4.

[0085] Note that the above is only a preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A tape break detection device, characterized in that, Comprising: A mounting bracket (1) for connecting with a lifting platform (30); A detection sensor (4) mounted on the mounting bracket (1) and having a triggered state and a non-triggered state; A belt connection assembly (2) slidably arranged on the mounting bracket (1) and used for connecting with a transmission belt (20). The belt connection assembly (2) can slide vertically relative to the mounting bracket (1) after the transmission belt (20) breaks, so that the detection sensor (4) switches between the triggered state and the non-triggered state; The mounting bracket (1) has a mounting cavity (14) penetrating along a first direction. The belt connection assembly (2) is partially located in the mounting cavity (14) and is slidably connected with the mounting bracket (1). The belt connection assembly (2) extends out of the mounting cavity (14) and is used for connecting with the transmission belt (20). The first direction is perpendicular to the vertical direction; The detection sensor (4) is mounted on the outer side of the lower end of the mounting bracket (1) and is located below the belt connection assembly (2). The belt connection assembly (2) can slide downward relative to the mounting bracket (1) after the transmission belt (20) breaks until it abuts against the triggering part (42) of the detection sensor (4), so that the detection sensor (4) switches to the triggered state; The detection sensor (4) includes a housing (41) and a triggering part (42) located outside the housing (41). The triggering part (42) is in a rod-shaped structure and can rotate relative to the housing (41). The housing (41) is mounted on the outer side of the lower end of the mounting bracket (1). The triggering part (42) is located on the side of the mounting bracket (1) away from the transmission belt (20) and the top end is higher than the bottom of the mounting cavity (14); The belt connection assembly (2) includes a connection base (21) and a triggering piece (23). The connection base (21) is slidably connected with the mounting bracket (1). The triggering piece (23) is detachably connected to one side of the connection base (21). The other side of the connection base (21) is used for connecting with the transmission belt (20). The triggering piece (23) extends out of the mounting cavity (14) and can abut against the triggering part (42); 2. The tape break detection device according to claim 1, characterized in that, The belt breakage detection device further includes an elastic member (3). The elastic member (3) is in a pre-compressed or pre-stretched state when the transmission belt (20) is in a normal operation state. The elastic member (3) applies a downward restoring force to the belt connection assembly (2) after the transmission belt (20) breaks; 3. The tape break detection device according to claim 2, characterized in that, The belt breakage detection device further includes a limiting member (6) for limiting the deformation degree of the elastic member (3) in the pre-compressed or pre-stretched state; 4. The tape break detection device according to claim 1, characterized in that, The belt connection assembly (2) further includes a clamping plate (22). The connection base (21) and the clamping plate (22) are detachably connected. The connection base (21) is slidably arranged on the mounting bracket (1) vertically. The connection base (21) and the clamping plate (22) cooperate to clamp the transmission belt (20).

5. The tape break detection device according to claim 4, characterized in that, The transmission belt (20) is a toothed belt. On one side of the clamping plate (22) facing the connection base (21) and / or on one side of the connection base (21) facing the clamping plate (22), there are convex teeth protruding. A plurality of the convex teeth are arranged at intervals in the vertical direction, and the convex teeth are adapted to the tooth grooves of the toothed belt.

6. The tape break detection device according to claim 4, characterized in that, On one side of the connection base (21) facing the clamping plate (22), there is a positioning groove which penetrates the upper and lower ends of the connection base (21). The width of the positioning groove is equal to the bandwidth of the transmission belt (20), and the depth of the positioning groove is less than the thickness of the transmission belt (20).

7. The tape break detection device according to claim 1, characterized in that, A vertical guide shaft (7) is fixedly provided on the mounting frame (1), and the belt connection assembly (2) is slidably sleeved on the guide shaft (7).

8. The tape break detection device according to claim 7, wherein, A guide hole is penetrated and opened on the connection base (21), and a lubricating bushing (24) is press-fitted in the guide hole. The guide shaft (7) slidably penetrates through the lubricating bushing (24).

9. The tape break detection device according to claim 1, characterized in that, The belt breakage detection device further includes an upper limit member for defining the minimum distance between the top wall of the installation cavity (14) and the belt connection assembly (2); and / or, The belt breakage detection device further includes a lower limit member for defining the minimum distance between the bottom wall of the installation cavity (14) and the belt connection assembly (2).

10. The tape break detection device according to claim 9, characterized in that, The upper limit member is a limit rod (61), and the limit rod (61) is screwed through the top of the mounting frame (1) and the lower end extends into the installation cavity (14).

11. An elevating device, comprising a frame, a lifting platform (30) mounted on the frame, and a belt-type elevating drive mechanism, the belt-type elevating drive mechanism comprising a transmission belt (20), characterized in that, It further includes the belt breakage detection device according to any one of claims 1-10. The lifting platform (30) is connected to the transmission belt (20) through the belt breakage detection device, and the lifting platform (30) is connected to the mounting frame (1), and the belt connection assembly (2) is connected to the transmission belt (20).

12. A warehousing and logistics system, characterized in that, It includes the lifting device according to claim 11.

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