A protective device for a crusher

Abstract

The present application discloses a pulverizer protection device, including a casing body, a fixed plate, a plug-in part, a cover plate and a transmission structure, wherein one end of the casing body has an opening, the fixed plate is provided with a plug-in part, the plug-in part is provided with a plug, the cover plate is movably provided at the opening end of the casing body, and in the movable stroke of the cover plate, the cover plate has an open position for revealing the opening and a closed position for covering the opening, the transmission structure includes a connecting part, a transmission shaft, a gear and a rack, the connecting part has a connecting end fixedly connected to the transmission shaft and a driving end connected to the cover plate, the transmission shaft is axially rotatably installed on the casing body, so that the cover plate can switch between the open position and the closed position depending on the forward and reverse rotation of the transmission shaft, wherein the gear is provided on the transmission shaft and meshes with the rack, and the rack is connected with a plug-in part, so that when the cover plate is in the closed position, the plug is plugged into the plug-in part. The purpose is to start the pulverizer only after the cover plate is closed, thereby improving safety.

Description

Technical Field

[0001] The present application relates to the technical field of sample preparation pulverizers, and in particular to a pulverizer protection device. Background Art

[0002] A sample crusher is a device used to crush large solid samples (such as ores, minerals, metals, alloys, chemical products, agricultural products, etc.) into small particles or powders to facilitate sample preparation and analysis. In geology, metallurgy, chemical industry, agriculture, medicine and other industries, in order to accurately conduct chemical analysis, physical testing or other experimental research, it is usually necessary to prepare samples into uniform, fine particles or powders.

[0003] When using a sample preparation grinder to grind electrolyte samples, if the operator starts the equipment without closing the cover of the sample preparation grinder, the electrolyte blocks being ground are likely to splash, posing a safety hazard. Summary of the invention

[0004] The embodiment of the present application provides a grinder protection device, which can ensure that the grinder will not start until the cover plate is closed.

[0005] In the first aspect, an embodiment of the present application provides a pulverizer protective device, comprising a casing body, a fixed plate, a plug-in portion, a cover plate and a transmission structure, wherein one end of the casing body has an opening, the fixed plate is provided with a socket, the plug-in portion is provided with a plug, the cover plate is movably arranged at the open end of the casing body, and during the movable stroke of the cover plate, the cover plate has an open position exposing the opening and a closed position covering the opening, the transmission structure comprises a connecting portion, a transmission shaft, a gear and a rack, the connecting portion has a connecting end fixedly connected to the transmission shaft and a driving end drivingly connected to the cover plate, the transmission shaft is rotatably installed on the casing body around its axial direction, so that the cover plate can switch between the open position and the closed position depending on the forward and reverse rotation of the transmission shaft, wherein the gear is provided on the transmission shaft and meshes with the rack, and the rack is connected to the plug-in portion, so that when the cover plate is in the closed position, the plug is plugged into the socket.

[0006] In some embodiments, the cover plate is rotatably mounted on the open end of the casing body, and the connecting portion includes a first connecting segment and a second connecting segment, the first connecting segment having the connecting end and extending in a direction away from the cover plate, and the second connecting segment having the driving end, and the second connecting segment extending in a direction close to the first connecting segment and connected to the first connecting segment.

[0007] In some embodiments, the pulverizer protection device further includes a movable block provided with an avoidance hole, the movable block is hinged to the opening end of the casing body, and the cover plate is movably arranged to pass through the avoidance hole.

[0008] In some embodiments, the socket is arranged at the bottom of the fixed plate, the plug-in portion includes a parallel four-bar linkage mechanism and a fixed seat, the parallel four-bar linkage mechanism includes a supporting portion, a lifting portion and two movable portions, the supporting portion is fixedly connected to the rack, the top of the lifting portion is provided with the plug, the two ends of the movable portion are respectively hinged to the supporting portion and the lifting portion, the top of the fixed seat is provided with the fixing plate and is spaced apart from the parallel four-bar linkage mechanism along the length direction of the rack, and the spacing between the supporting portion and the fixed seat is greater than the spacing between the lifting portion and the fixed seat.

[0009] In some embodiments, the supporting part includes two supporting plates and two first fixing rods, both ends of the first fixing rods are respectively fixed to the two supporting plates, and the lifting part includes two lifting plates and two second fixing rods, both ends of the second fixing rods are respectively fixed to the two lifting plates, wherein both ends of the movable part are respectively hinged to the first fixing rod and the second fixing rod, and the tops of the two supporting plates are abutted against the bottoms of the two lifting plates.

[0010] In some embodiments, the grinder protection device also includes a shielding portion, which includes two guide plates and a protective plate. The two guide plates are arranged between the gear and the fixed seat, and the two guide plates are arranged at intervals. The protective plate is arranged above the two guide plates and is enclosed with the two guide plates to form a guide channel for the parallel four-bar linkage mechanism to pass through.

[0011] In some embodiments, the plug includes a movable section and a first elastic member, the bottom of the movable section is hinged to the top of the fixed section, and two ends of the first elastic member are respectively fixed to the fixed section and the movable section.

[0012] In some embodiments, the grinder guard device also includes a fastening structure, which includes a fastener and an alignment hole, wherein the fastener is threadedly connected to the open end of the casing body, the fastener is rectangular, and the alignment hole is rectangular. The alignment hole is provided on the cover plate so that the fastener can pass through when the cover plate is in the closed position, wherein the width of the alignment hole is smaller than the length of the fastener.

[0013] In some embodiments, the pulverizer protection device further includes a second elastic member, and two ends of the second elastic member are respectively fixed to the connecting portion and the inner side wall of the casing body.

[0014] In some embodiments, a receiving groove is provided at the bottom of the fixing plate, and the shredder protection device further includes a first magnetic attraction portion, a second magnetic attraction portion and a circuit board assembly, wherein the first magnetic attraction portion is provided inside the receiving groove, and the second magnetic attraction portion is provided at the top of the lifting portion and can be magnetically attracted to the first magnetic attraction portion, and the circuit board assembly electrically connects the first magnetic attraction portion and the second magnetic attraction portion to control the first magnetic attraction portion and the second magnetic attraction portion to engage and disengage.

[0015] Based on the pulverizer protection device of the embodiment of the present application, when the pulverizer is to be started, the cover plate can be moved from the open position to the closed position, or the transmission shaft can be rotated around its axial direction, so that the connecting part fixedly connected thereto rotates around the axial direction of the transmission shaft, and then the connecting part drives the cover plate to move toward the closed position, and at the same time the gear and the rack are meshed for transmission, so that the rack moves in the direction of its own length, and drives the plug-in part to move, so that the plug moves in the direction of the socket and is plugged into the socket, and then the pulverizer can be successfully started. After the cover plate leaves the closed position, the transmission shaft will rotate in the opposite direction, so that the rack meshing with the gear moves in the opposite direction, and drives the plug to disengage from the socket, that is, when the cover plate leaves the closed position without covering the opening, the plug, the socket and the pulverizer cannot form a closed circuit, and then the pulverizer can be successfully started only after the cover plate is closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic diagram of the main structure of a pulverizer protection device and a pulverizer of the present application;

[0018] Figure 2 A schematic diagram of a crusher protection device and a top view of the crusher is applied for;

[0019] Figure 3 for Figure 1 A schematic diagram of the main structure of the plug-in portion, the shielding portion and the fixing seat;

[0020] Figure 4 for Figure 3 A schematic diagram of the main structure of the plug-in portion, the shielding portion and the fixing seat when the cover is in a closed position;

[0021] Figure 5 for Figure 3 A schematic diagram of the top view of the gear, rack, parallel four-bar linkage and fixed seat;

[0022] Figure 6 It is a schematic diagram of the main structure of the pulverizer and the cover plate when the cover plate is in the open position;

[0023] Figure 7 It is a schematic diagram of the structure of the crusher and the cover plate from a top view when the cover plate is in a closed position;

[0024] Figure 8 for Figure 1 A schematic diagram of the main structure of the middle plug;

[0025] Fig. 9 for Figure 8 Schematic diagram of the main structure of the middle plug when entering the guide channel.

[0026] Description of reference numerals:

[0027] 100. grinder protection device; 1. cover plate; 2. movable block; 3. plug-in part; 4. fixing seat; 5. casing body; 6. fastening structure; 7. shielding part; 8. plug; 9. first magnetic part; 31. transmission structure; 32. parallel four-bar linkage; 41. fixing plate; 51. opening; 61. fastener; 62. alignment hole; 71. protective plate; 72. guide plate; 81. movable section; 82. first elastic member; 83. fixed section; 311. gear; 312. rack; 313. connecting part; 314. transmission shaft; 321. support plate; 322. lifting plate; 323. movable part; 3121. linear drive device; 3131. second elastic member; 3211. first fixed rod; 3221. second fixed rod; 3231. movable rod; 3232. reinforcing rod.

[0028] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] A sample crusher is a device used to crush large solid samples (such as ores, minerals, metals, alloys, chemical products, agricultural products, etc.) into small particles or powders to facilitate sample preparation and analysis. In geology, metallurgy, chemical industry, agriculture, medicine and other industries, in order to accurately conduct chemical analysis, physical testing or other experimental research, it is usually necessary to prepare samples into uniform, fine particles or powders.

[0031] When using a sample preparation grinder to grind electrolyte samples, if the operator starts the equipment without closing the cover of the sample preparation grinder, the electrolyte blocks being ground are likely to splash, posing a safety hazard.

[0032] In view of this, the present application proposes a pulverizer protection device. Figures 1 to 9 This is a schematic diagram of the structure of the pulverizer protection device according to the embodiment of the present application.

[0033] See also Figure 1 and Figure 2 The pulverizer protection device 100 includes a housing body 5, a fixing plate 41, a plug-in portion 3, a cover plate 1 and a transmission structure 31. One end of the housing body 5 has an opening 51, the fixing plate 41 is provided with a plug hole, the plug-in portion 3 is provided with a plug 8, the cover plate 1 is movably arranged at the opening end of the housing body 5, and in the movable stroke of the cover plate 1, the cover plate 1 has an open position that exposes the opening 51 and a closed position that covers the opening 51. The transmission structure 31 includes a connecting portion 313, a transmission shaft 314, a gear 31 1 and a rack 312, the connecting portion 313 has a connecting end fixedly connected to the transmission shaft 314 and a driving end drivingly connected to the cover 1, the transmission shaft 314 is rotatably mounted on the casing body 5 around its axial direction, so that the cover 1 can switch between the open position and the closed position depending on the forward and reverse rotation of the transmission shaft 314, wherein the gear 311 is arranged on the transmission shaft 314 and meshes with the rack 312, and the rack 312 is connected with the plug-in portion 3, so that when the cover 1 is in the closed position, the plug 8 is plugged into the socket 9.

[0034] In the technical solution provided by the present application, when the crusher is to be started, the cover plate 1 can be manually operated to move from the open position to the closed position, and then the transmission shaft 314 can be driven to rotate through the connecting portion 313. Of course, the transmission shaft 314 can also be rotated around its axial direction first, so that the connecting portion 313 fixedly connected thereto rotates around the axial direction of the transmission shaft 314, and then the connecting portion 313 drives the cover plate 1 to move toward the closed position. At the same time, the gear 311 and the rack 312 are meshed and transmitted, so that the rack 312 moves in its own length direction, and drives the plug-in portion 3 to move, so that the plug 8 moves in the direction of the socket 9 and plugs into the socket 9, and then the crusher can be successfully started. After the cover plate 1 leaves the closed position, the transmission shaft 314 will rotate in the opposite direction, and then the rack 312 meshed with the gear 311 will move in the opposite direction, and drive the plug 8 to disengage from the socket 9, that is, when the cover plate 1 leaves the closed position without covering the opening, the plug 8, the socket 9 and the crusher cannot form a closed circuit, and then the crusher can be successfully started only after the cover plate 1 is covered.

[0035] It should be noted that the inside of the casing body 5 has a cavity for accommodating solid samples that need to be crushed. When the cover 1 is in the closed position, the solid sample can be covered in the cavity to prevent the solid sample from splashing. The plug 8 can be a power plug, and the jack 9 can be a hole on the power socket. The plug 8 and the jack 9 can be connected to the power supply to form a closed circuit with the grinder, so that the grinder can be successfully started. The cover 1 is movably arranged at the open end of the casing body 5, that is, the cover 1 can be moved from the open position to the closed position by translation to cover the opening. The driving end of the connecting part 313 drives the connected cover 1, and the driving end can abut against the cover 1. The cover 1 pushes the driving end to move during the translation process, thereby driving the transmission shaft 314 to rotate around its own axis. Of course, the cover 1 can also move from the open position to the closed position by rotation to cover the opening.

[0036] It can be understood that a button that can form a closed loop with the plug 8, the socket 9 and the grinder can be set at a position away from the grinder. The button is movably arranged on the grinder. During the movable stroke of the button, the button has a connected position. When the cover 1 is in the closed position and the button is in the connected position, the grinder is started. The cover 1 can be covered first to make the cover 1 in the closed position, and then the button can be moved to the connected position. The grinder can be started remotely with higher safety. The button can be moved to the connected position by pressing, and can also be rotated to the connected position by rotating.

[0037] Of course, a linear drive device 3121 can also be provided which is drivably connected to one end of the rack 312 away from the support portion to drive the rack 312 to move along the length direction of the rack 312. In this way, the linear drive device 3121 can be remotely controlled to operate so that the cover plate 11 can automatically move from an open position to a closed position, or from a closed position to an open position, thereby realizing remote start and shutdown of the crusher. The linear drive device 3121 can include a drive cylinder, and a piston rod of the drive cylinder is fixedly connected to the rack 312. The piston rod drives the movement of the rack 312 during the extension and retraction process, thereby rotating the gear 311 and also moving the support portion. Of course, the linear drive device 3121 can also include a crank slider mechanism and a drive motor. The crank slider mechanism converts the rotational motion of the drive motor into the linear motion of the rack 312.

[0038] In order to reduce the friction resistance encountered by the cover 1 during its movement and to save horizontal space after the cover 1 is opened, the cover 1 can be moved from an open position to a closed position by rotation to cover the opening. In an embodiment of the present application, the cover 1 is rotatably installed at the open end of the casing body 5, and the connecting portion includes a first connecting segment and a second connecting segment. The first connecting segment has a connecting end and extends in a direction away from the cover 1, and the second connecting segment has a driving end. The second connecting segment extends in a direction close to the first connecting segment and is connected to the first connecting segment. In this way, the first connecting segment can have a tendency to rotate in the direction of covering the opening, so that the cover 1 and the connecting portion 313 can rotate more smoothly.

[0039] In order to reduce the space occupied by the cover plate 1 in the vertical direction when it is movable and the space occupied in the horizontal direction when it is in the open position, in the embodiment of the present application, the crusher protection device also includes a movable block 2 provided with an avoidance hole, the movable block 2 is hinged to the open end of the casing body, and the cover plate 1 is movably arranged in the avoidance hole. When the opening 51 is to be covered, the cover plate 1 will pass through the avoidance hole and move along its own length direction and gradually approach the closed position, so that the distance between the cover plate 1 and the top of the crusher is always small, reducing the space occupied in the vertical direction. When the cover plate 11 is in the open position, please refer to Figure 6 The cover plate 1 is in a vertical state, that is, the cover plate 1 and the crusher are arranged side by side, and extend from the bottom of the casing body 5 to the top of the casing body, and will not occupy too much space above the top of the casing body 5, nor will it occupy too much horizontal space. Among them, the movable block 2 can limit and resist both sides of the cover plate 1 when it rotates, to prevent the cover plate 1 from moving to both sides when it rotates, and has a good guiding effect, so that the cover plate 1 can smoothly cover the entire opening 201 of the crusher.

[0040] It can be understood that a stop block for positioning the cover plate 1 in the open position may be provided at one end of the cover plate 1, and the stop block may position the cover plate 1 after abutting against the top of the grinder or the movable block 2, and an abutment block abutting against the movable block 2 may be provided at the other end of the cover plate 1 to prevent the cover plate 1 from continuing to move toward the closed position and completely passing through the movable block 2 and revealing a portion of the opening 201.

[0041] In order to reduce the possibility of water or insulating dust falling into the socket and to protect the socket 9, in the embodiment of the present application, the socket 9 is arranged at the bottom of the fixed plate 41, the plug-in portion 3 includes a parallel four-bar linkage 32 and a fixed seat 4, the parallel four-bar linkage 32 includes a supporting portion, a lifting portion and two movable portions 323, the supporting portion is fixedly connected to the rack 312, a plug 8 is provided on the top of the lifting portion, and the two ends of the movable portion 323 are respectively hinged to the supporting portion and the lifting portion, a fixing plate 41 is provided on the top of the fixed seat 4 and is spaced from the parallel four-bar linkage 32 along the length direction of the rack 312, the spacing between the supporting portion and the fixed seat 4 is greater than the spacing between the lifting portion and the fixed seat 4, the socket 8 is arranged at the bottom of the fixed plate 41, which can prevent the socket 8 from having poor contact with the plug 8 or short circuit due to water, and can also prevent a small amount of water in the socket 8 The plug 8 falls down by itself under the action of gravity and flows out of the socket 8, thereby improving the sensitivity of the connected circuit after the cover 1 is closed. The parallel four-bar linkage 32 can enable the plug 8 to be inserted into the socket 8 at the bottom of the fixed plate 41 more smoothly and accurately from bottom to top, wherein the movement of the rack 312 will drive the supporting part and the lifting part to move in the length direction of the rack 312. During the movement of the lifting part and the supporting part, the lifting part first contacts the fixed seat 4, that is, first abuts against the fixed seat 4, and the fixed seat 4 will limit the continued movement of the lifting part, while the supporting part continues to move in the original direction and applies thrust to the lifting part through the two movable parts 323, and the lifting part can move in the vertical direction. Under the action of the two movable parts 323, the lifting part moves upward in the vertical direction, and the plug 8 is smoothly and accurately inserted into the socket at the bottom of the fixed plate 41.

[0042] In order to reduce the supporting pressure of the two movable parts 323 on the lifting part, in the embodiment of the present application, the supporting part includes two supporting plates 321 and two first fixing rods 3211, and the two ends of the first fixing rod 3211 are respectively fixed to the two supporting plates 321, and the lifting part includes two lifting plates 322 and two second fixing rods 3221, and the two ends of the second fixing rod 3221 are respectively fixed to the two lifting plates 322, and the two ends of the movable part 323 are respectively hinged to the first fixing rod 3211 and the second fixing rod 3221, and the tops of the two supporting plates 321 are abutted against the bottoms of the two lifting plates 322, and the tops of the two supporting plates 321 are respectively abutted against the bottoms of the two lifting plates 322 Direct contact is used to support the two lifting plates 322, which reduces the load on the two movable parts 323 and prevents the movable parts 323 from being deformed due to supporting the heavier lifting parts, thereby preventing the lifting parts from tilting and affecting the accurate insertion of the plug 8 and the socket. The two lifting plates 322 can move upward more smoothly and accurately along the vertical direction, and by setting the first fixed rod 3211 and the second fixed rod 3221, the movable parts 323 can be directly hinged to the first fixed rod 3211 and the second fixed rod 3221, so that the two movable parts 323 are hinged to the supporting part and the lifting part. In another embodiment, a column is installed on the upper surface of the supporting part, and the top of the column abuts against the bottom of the lifting part.

[0043] It can be understood that in order to improve the bearing capacity of the movable part 323, the movable part 323 includes two movable rods 3231 and a reinforcing rod 3232, the two ends of the two movable rods 3231 are respectively hinged to the supporting part and the lifting part, the two ends of the reinforcing rod 3232 are respectively connected to the two movable rods 3231, the two movable rods 3231 and the reinforcing rod 3232 are integrally arranged, wherein the two movable rods 3231 can be spaced apart and support the lifting part, thereby stably supporting the lifting part and jointly bearing the weight of the lifting part, and the reinforcing rod 3232 can reduce the deformation of the two movable rods 3231 in the direction of approaching or moving away from each other, thereby further enhancing the bearing capacity and mechanical strength of the movable part 323.

[0044] In order to prevent water from falling onto the plug 8 and to guide the parallel four-bar linkage 32, in an embodiment of the present application, the grinder protection device also includes a shielding portion 7, the shielding portion 7 includes two guide plates 72 and a protective plate 71, the two guide plates 72 are arranged between the gear 311 and the fixed seat 4, the two guide plates 72 are arranged at intervals, the protective plate 71 is arranged above the two guide plates 72, and is enclosed with the two guide plates 72 to form a guide channel for the parallel four-bar linkage 32 to pass through, so that the plug 8 can be placed under the protective plate 71, and the parallel four-bar linkage 32 can also make a linear motion along the length direction of the rack 312 and accurately contact the fixed seat 4.

[0045] In order to reduce the possibility of water or insulating dust falling from the side onto the plug 8 when the cover 1 is in the open position, or to reduce the space occupied by the protective plate 71 in the vertical direction, so that the height of the protective plate 71 is lower than the height of the plug 8, in the embodiment of the present application, the plug 8 includes a fixed section 83, a movable section 81 and a first elastic member 82, the bottom of the movable section 81 is hinged to the top of the fixed section 83, and the two ends of the first elastic member 82 are respectively fixed to the fixed section 83 and the movable section 81, so that when the cover 1 is opened, the plug 8 includes a fixed section 83, a movable section 81 and a first elastic member 82, the bottom of the movable section 81 is hinged to the top of the fixed section 83, and the two ends of the first elastic member 82 are respectively fixed to the fixed section 83 and the movable section 81. During the process of covering the cover 1, the plug 8 and the lifting part will move toward the guide channel under the action of the rack 312, that is, the plug 8 moves in the direction of the protective plate 71, the movable section 81 will contact the protective plate 71 and continue to move, and the movable section 81 will be subjected to the reaction force of the protective plate 71 and compress the first elastic member 82 downward, and then smoothly enter under the protective plate 71 and contact with the protective plate 71. When the plug 8 moves out of the guide channel, the movable section 81 will return to a vertical state under the elastic force of the first elastic member 82 without affecting the connection with the socket.

[0046] In order to make the cover plate 1 close more tightly when the cover plate 1 is in the closed position and prevent the cover plate 1 from shaking due to various reasons, in an embodiment of the present application, the grinder protection device also includes a fastening structure 6, which includes a fastener 61 and an alignment hole 62. The fastener 61 is threadedly connected to the open end of the casing body, the fastener 61 is arranged in a rectangular shape, and the alignment hole 62 is arranged in a rectangular shape. The alignment hole 62 is arranged on the cover plate 1 so that the fastener 61 can pass through when the cover plate 1 is in the closed position, wherein the width of the alignment hole 62 is smaller than the length of the fastener 61. When the cover plate 1 covers the opening 201 and the fastener 61 passes through the alignment hole 62, the fastener 61 is rotated to make the fastener 61 move downward and contact the cover plate 1. The fastener 61 is continued to be rotated to tighten the fastener 61 so that the cover plate 1 and the top of the grinder are covered more tightly. When the cover plate 1 needs to be opened, the fastener 61 can be rotated in the opposite direction.

[0047] In order to prevent forgetting to tighten the closed cover 1, in an embodiment of the present application, the crusher protection device also includes a second elastic member 3131, and the two ends of the second elastic member 3131 are respectively fixed to the connecting portion 313 and the inner wall of the casing body. In this way, when the cover 1 moves to the closed position, it will be subjected to the elastic force applied by the second elastic member 3131 to slow down the movement of the cover 1, and then when the cover 1 is manually closed, it can prevent the hand from being pinched due to closing too quickly and without time to react. When the cover 1 is in the closed position, the external force pushing the cover 1 to close is removed, and the cover 1 will bounce away from the closed position under the action of the elastic force of the second elastic member 3131, thereby preventing the crusher from being successfully started, so as to remind the operator to tighten the fasteners 61 to tighten the cover 1.

[0048] In order to make the plug 8 firmly plugged into the socket, in the embodiment of the present application, a receiving groove is provided at the bottom of the fixing plate 41, and the grinder protection device also includes a first magnetic attraction portion 9, a second magnetic attraction portion and a circuit board assembly, the first magnetic attraction portion 9 is arranged inside the receiving groove, the second magnetic attraction portion is arranged at the top of the lifting portion and can be magnetically attracted to the first magnetic attraction portion 9, and the circuit board assembly is electrically connected to the first magnetic attraction portion 9 and the second magnetic attraction portion to control the first magnetic attraction portion 9 and the second magnetic attraction portion to be engaged or disengaged, wherein the first magnetic attraction portion 9 is arranged in the receiving groove, so that the second magnetic attraction portion can enter the receiving groove, and after the plug 8 enters the socket, the lifting portion The top of the lifting part can abut against or directly contact the bottom of the fixing plate 41, so that the second magnetic attraction part can completely enter the accommodating groove, and the plug 8 can completely enter the socket, so that the plug 8 can be inserted more firmly and the circuit connection can be easier. The circuit board assembly can make the first magnetic attraction part 9 and the second magnetic attraction part attract each other after the plug 8 is inserted into the socket, and when the plug 8 is about to leave the socket, the first magnetic attraction part 9 and the second magnetic attraction part repel each other. The first magnetic attraction part 9 and the second magnetic attraction part can be two electromagnets, and the circuit board assembly can control the two electromagnets to gain and lose power to control the two electromagnets to attract and repel each other.

[0049] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0050] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A pulverizer protection device, characterized in that: include: The casing body has an opening at one end; A fixing plate provided with a socket; A plug-in portion, provided with a plug; a cover plate movably disposed at the opening end of the housing body, wherein during the movement of the cover plate, the cover plate has an open position for exposing the opening and a closed position for covering the opening; and A transmission structure includes a connecting part, a transmission shaft, a gear and a rack, wherein the connecting part has a connecting end fixedly connected to the transmission shaft and a driving end drivingly connected to the cover plate, and the transmission shaft is rotatably installed on the casing body around its axial direction so that the cover plate can be switched between the open position and the closed position depending on the forward and reverse rotation of the transmission shaft, wherein the gear is arranged on the transmission shaft and meshes with the rack, and the rack is connected to the plug-in part so that the plug is plugged into the socket when the cover plate is in the closed position.

2. The pulverizer protection device according to claim 1, characterized in that: The cover plate is rotatably mounted on the open end of the housing body, and the connecting portion includes: A first connecting section having the connecting end and extending in a direction away from the cover plate; as well as, The second connecting section has the driving end, and the second connecting section extends in a direction close to the first connecting section and is connected to the first connecting section.

3. The pulverizer protection device according to claim 1, characterized in that: The pulverizer protection device further comprises a movable block provided with an avoidance hole, the movable block is hinged to the opening end of the casing body, and the cover plate is movably arranged through the avoidance hole.

4. The pulverizer protection device according to claim 1, characterized in that: The jack is arranged at the bottom of the fixing plate, and the plug-in portion comprises: A parallel four-bar linkage mechanism, comprising a supporting part, a lifting part and two movable parts, wherein the supporting part is fixedly connected to the rack, the top of the lifting part is provided with the plug, and the two ends of the movable part are respectively hinged to the supporting part and the lifting part; as well as, A fixing seat is provided with the fixing plate on the top and is spaced apart from the parallel four-bar linkage along the length direction of the rack, and the spacing between the supporting portion and the fixing seat is greater than the spacing between the lifting portion and the fixing seat.

5. The pulverizer protection device according to claim 4, characterized in that: The support portion includes two support plates and two first fixing rods, and two ends of the first fixing rods are respectively fixed to the two support plates; The lifting parts each include two lifting plates and two second fixing rods, and two ends of the second fixing rods are respectively fixed to the two lifting plates; Wherein, two ends of the movable part are hinged to the first fixing rod and the second fixing rod respectively, and the tops of the two supporting plates are abutted against the bottoms of the two lifting plates.

6. The pulverizer protection device according to claim 4, characterized in that: The pulverizer protection device further includes a shielding portion, and the shielding portion includes: two guide plates, disposed between the gear and the fixing seat, the two guide plates being spaced apart; and, The protection plate is arranged above the two guide plates and is enclosed with the two guide plates to form a guide channel for the parallel four-bar linkage to pass through.

7. The pulverizer protection device according to claim 6, characterized in that: The plug comprises: Fixed segment; a movable section, the bottom of which is hinged to the top of the fixed section; and The first elastic member has two ends fixedly connected to the fixed section and the movable section respectively.

8. The pulverizer protection device according to claim 1, characterized in that: The pulverizer guard also includes a fastening structure, which includes: a fastener, threadedly connected to the open end of the housing body, the fastener being arranged in a rectangular shape; and, An alignment hole, which is arranged in a rectangular shape and is arranged on the cover plate so as to allow the fastener to pass through when the cover plate is in the closed position; Wherein, the width of the alignment hole is smaller than the length of the fastener.

9. The pulverizer protection device according to claim 8, characterized in that: The pulverizer protection device further comprises a second elastic member, two ends of which are respectively fixed to the connecting portion and the inner side wall of the casing body.

10. The pulverizer guard according to claim 1, characterized in that: The bottom of the fixing plate is provided with a receiving groove, and the pulverizer protection device further comprises: A first magnetic attraction portion is disposed inside the receiving groove; A second magnetic attraction portion is disposed on the top of the lifting portion and can be magnetically attracted to the first magnetic attraction portion; and The circuit board assembly is electrically connected to the first magnetic attraction portion and the second magnetic attraction portion, and is used to control the first magnetic attraction portion and the second magnetic attraction portion to be engaged or disengaged.

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