A linkage locking connection mechanism, a charging unit and a mining explosion-proof charging device

Abstract

This application relates to a linkage locking connection mechanism, belonging to the field of connector technology, including a first connector and a toothed drive component, as well as a linkage limiting component, a second connector, an electromagnetic telescopic component, and a meshing component; the linkage limiting component forms a plug-in limiting fit with the second connector, and the linkage limiting component also forms a limiting snap fit with the energized electromagnetic telescopic component; this application facilitates plugging and unplugging and improves the anti-disengagement performance of the connector; this application also relates to a charging unit, including a linkage locking connection mechanism, with the first connector configured as a charging socket and the second connector configured as a charging plug; this application can be applied to any charging equipment field to improve its anti-disengagement performance; this application also relates to a mine explosion-proof charging device, including a charging unit, an explosion-proof sleeve and an explosion-proof ring forming a plug-in fit, a primary explosion-proof cavity and a secondary explosion-proof cavity, and an explosion-proof cover; this application improves the overall anti-disengagement and explosion-proof performance.

Description

Technical Field

[0001] This invention relates to the field of connectors and charging equipment technology, and in particular to a linkage locking connection mechanism, a charging unit, and an explosion-proof charging device for mining. Background Technology

[0002] Connectors, also known as plugs, are used to connect two active devices to transmit current or signals. Depending on the application and environment, connectors come in various forms and structures. Mining explosion-proof cable connectors are mainly used in underground coal mines and environments with explosive gas mixtures such as coal dust and methane, serving as a connection device between power cables and explosion-proof electrical switchgear. They can also be used as connectors for information communication cables in underground coal mines.

[0003] However, for mining equipment with high load drive requirements, the diameter and weight of the mining cables used are not as large as those of traditional cables, making them difficult to drag. At the same time, in order to meet the requirements of explosion protection, the housing structure of the charging connector is made of heavy metal materials, and a certain insertion depth is required in the actual insertion and removal operation, which will result in the entire insertion and removal operation requiring a lot of manpower. Furthermore, during actual charging operations, only simple mechanical locking mechanisms are used, such as bolt and nut connections, snap-fit ​​and buckle engagements, etc. Under operator error, the charging connector is prone to detachment. Moreover, in the event of an explosion, the single locking mechanism provides poor anti-detachment performance and needs improvement. Summary of the Invention

[0004] To improve the ease of connector insertion and removal while enhancing the connector's anti-dislodgement performance, this application provides a linkage locking connection mechanism.

[0005] The linkage locking connection mechanism provided in this application adopts the following technical solution: A linkage locking connection mechanism includes a first connecting body, a toothed driving member rotatably disposed on the first connecting body as a driving source, and a linkage limiting member disposed on the first connecting body. It also includes a second connector, an electromagnetic telescopic component disposed on the second connector, and a meshing component fixedly disposed on the second connector to form a linear meshing transmission with the toothed drive component, wherein the linear meshing transmission direction of the toothed drive component and the meshing component is parallel to the insertion direction of the second connector. When the second connector is inserted into the terminal of the first connector, the linkage limiting component forms an insertion limiting engagement with the second connector, and the linkage limiting component also forms a limiting snap engagement with the energized electromagnetic telescopic component.

[0006] By adopting the above technical solution, in actual use, when the second connector is connected to the first connector, the linear meshing transmission between the toothed drive component and the meshing component, which serves as the driving source, is used to assist the second connector in connecting it to the first connector, thereby playing a role in assisting and saving effort. When the second connector is inserted into the end of the first connector, the linkage limiting component and the second connector form a plug-in limiting engagement to restrict the movement of the second connector, thereby achieving a first-level mechanical anti-disengagement locking function; subsequently, the electromagnetic telescopic component is energized and telescopically moves, achieving a limiting engagement with the linkage limiting component, thereby achieving a second-level electronic anti-disengagement locking function. Furthermore, the electromagnetic telescopic component can be linked with the electronic control unit. By feeding back the current, it can determine the normal operation of the secondary electronic anti-disengagement locking function. Similarly, it serves as an early warning for the operator, meaning that only by releasing the electromagnetic lock can the primary mechanical lock be released, reducing the occurrence of accidental operation by the operator. At the same time, by utilizing the primary mechanical anti-disengagement locking function and the secondary electronic anti-disengagement locking function, the connector achieves a double locking function, improving the connector's anti-disengagement performance.

[0007] Preferably, a first active driving part is provided on the outer side of the first connecting body, and the first active driving part is coaxially and fixedly connected to the toothed driving member.

[0008] By adopting the above technical solution, when the insertion and removal operations of the first connector and the second connector are actually carried out, the operator can drive the first active drive unit set on the outside of the first connector, thereby driving the toothed drive component to rotate, which specifically realizes how the toothed drive workpiece can realize the function of the drive source.

[0009] Preferably, the linkage limiting component includes a first pin structure elastically disposed on the first connecting body, a first pin groove formed with the first pin structure to form a plug-in engagement on the second connecting body, and a snap-fit ​​groove formed with the electromagnetic telescopic component to form a limiting engagement.

[0010] By adopting the above technical solution, in actual use, when the second connector is inserted into the end of the first connector, the elastic force of the first pin structure is used to achieve the insertion and engagement with the first pin slot, thereby achieving the function of restricting the movement of the second connector; at the same time, the snap-fit ​​slot is used to achieve the limiting snap-fit ​​engagement with the electromagnetic telescopic component, thereby specifically realizing the limiting function and linkage of the linkage limiting component.

[0011] Preferably, the linkage limiting component further includes a drive worm sleeve rotatably connected to the first connecting body, the first pin structure being elastically inserted into the drive worm sleeve, the drive worm sleeve and the toothed drive component forming a worm gear transmission, and the drive worm sleeve extending out of the first connecting body and forming a second active drive part.

[0012] By adopting the above technical solution, in actual use, the second active drive unit provided by the extension of the drive worm sleeve to the first connecting body allows the operator to rotate the second active drive unit from the outside, causing the drive worm sleeve to rotate, which in turn drives the toothed drive component to rotate, so that the toothed drive component achieves the purpose of a drive source. Moreover, by using the worm gear transmission formed between the drive worm sleeve and the toothed drive component, a force-saving effect can be achieved by setting an appropriate transmission ratio.

[0013] Preferably, the linkage limiting component includes a limiting worm gear threadedly connected to the first connecting body. The limiting worm gear and the toothed drive component form a worm gear transmission. The limiting worm gear extends out of the first connecting body and forms a third active drive part. The electromagnetic telescopic component forms a snap-fit ​​limiting engagement with the external helical teeth of the limiting worm gear. When the second connecting body is inserted into the end of the first connecting body, the limiting worm gear and the second connecting body form an insertion limiting engagement.

[0014] By adopting the above technical solution, in actual use, the third active drive unit, which is provided by the extension of the limiting worm gear to the first connecting body, allows the operator to rotate the third active drive unit from the outside, causing the limiting worm gear to rotate, which in turn drives the toothed drive component to rotate, thus making the toothed drive component the driving source. Furthermore, utilizing the threaded connection between the limiting worm gear and the first connecting body, the limiting worm gear moves along its rotation axis while rotating. When the second connecting body is inserted into the end of the first connecting body, a plug-in limiting fit is formed between the limiting worm gear and the second connecting body, restricting the movement of the second connecting body. At this time, a snap-fit ​​limiting fit is formed between the electromagnetic telescopic component and the external helical teeth of the limiting worm gear, realizing a two-stage electronic locking function. In other words, the limiting worm gear achieves the function of driving the toothed drive component to rotate, the plug-in limiting fit with the second connecting body, and the snap-fit ​​limiting fit with the electromagnetic telescopic component, thus achieving a multi-functional integration.

[0015] Preferably, the first pin structure is rotatably inserted into the first connecting body, and a limiting body is fixedly provided on the side of the first pin structure extending out of the first connecting body. The first connecting body is provided with a first limiting groove and a second limiting groove of different heights at the rotatable insertion point of the first pin structure. When the first pin structure rotates to the point where the limiting body is in the first limiting groove, the first pin structure is in a state of being disengaged from the first pin groove. When the first pin structure rotates to the position of the limiting body in the second limiting groove, the first pin structure is in an elongated state under the action of elastic force, and when the second connecting body is inserted into the end of the first connecting body, the first pin structure in the elongated state forms a plug-in engagement with the first pin groove.

[0016] By adopting the above technical solution, in actual use, when the second connector is inserted or removed, the first pin structure is rotated until the limiting body is located in the first limiting groove, so that the first pin structure is disengaged from the first pin groove, thereby not hindering the insertion or removal of the second connector. When the first pin structure is rotated until the limiting body is located in the first limiting groove, the first pin structure is in an extended state under the action of elastic force. When the second connector is inserted into the end of the first connector, the first pin structure forms an insertion limiting cooperation with the first pin groove on the second connector, thereby switching the extended state of the first pin structure. While not affecting the insertion or removal of the second connector, the function of restricting the movement of the second connector is achieved.

[0017] Preferably, the first connecting body has a guide groove that forms a guiding and limiting fit with the meshing member.

[0018] By adopting the above technical solution, the guide groove provided on the first connector is used to form a guide and limiting fit with the meshing part, so that when the second connector is connected to the second connector, there will be no deviation on the periphery in the insertion direction.

[0019] Preferably, a one-way rotational damper is provided at the rotational connection between the toothed drive member and the first connecting body, so that the toothed drive member is subjected to anti-rotation damping during the process of the second connecting body disengaging from the first connecting body.

[0020] By adopting the above technical solution, when the second connector is inserted, the one-way rotation damper does not play a role, and the toothed drive rotates normally. However, when the second connector is pulled out, that is, during the process of the second connector separating from the first connector, the toothed drive receives anti-rotation damping from the one-way rotation damper, which makes it difficult for the second connector to be easily pulled out, thus further playing the role of preventing detachment.

[0021] Preferably, the helix angle of the drive worm sleeve is smaller than the equivalent friction angle between the drive worm sleeve and the meshing teeth of the toothed drive component.

[0022] By adopting the above technical solution, the helix angle of the drive worm sleeve is set to be less than the equivalent friction angle between the meshing teeth of the drive worm sleeve and the toothed drive component, thereby enabling the drive worm sleeve and the toothed drive component to have a self-locking function. This self-locking function can further prevent the second connecting body from being easily pulled out, thus improving the anti-disengagement performance.

[0023] Preferably, the helix angle of the limiting worm is less than the equivalent friction angle between the limiting worm and the meshing teeth of the toothed drive member.

[0024] By adopting the above technical solution, the helix angle of the limiting worm is set to be less than the equivalent friction angle between the meshing teeth of the limiting worm and the toothed drive component, thereby enabling the limiting worm and the toothed drive component to have a self-locking function. This self-locking function can further prevent the second connecting body from being easily pulled out, thus improving the anti-disengagement performance.

[0025] This application also provides a charging unit.

[0026] The charging unit provided in this application adopts the following technical solution: A charging unit includes the aforementioned linkage locking connection mechanism, wherein the first connector is configured as a charging socket and the second connector is configured as a charging plug.

[0027] By adopting the above technical solution, the first connector is set as a charging socket and the second connector is set as a charging plug, so that the linkage locking connection mechanism can be applied to any charging unit, which helps to improve the anti-disconnection performance of the charging components.

[0028] This application also provides an explosion-proof charging device for mining.

[0029] The explosion-proof charging device for mining provided in this application adopts the following technical solution: A mine explosion-proof charging device includes the above-mentioned charging unit. The first connecting body further includes an explosion-proof sleeve disposed around the charging socket, and the second connecting body further includes an explosion-proof ring disposed around the charging plug. The explosion-proof sleeve and the explosion-proof ring form a gap-fitted insertion fit. The explosion-proof sleeve is provided with a primary explosion-proof cavity. The toothed driving component and the linkage limiting component are both disposed in the primary explosion-proof cavity, and the meshing component is disposed on the explosion-proof ring. It also includes a secondary explosion-proof cavity disposed on the charging plug, wherein the electromagnetic telescopic component is disposed in the secondary explosion-proof cavity; The primary and secondary explosion-proof cavities are equipped with explosion-proof covers.

[0030] By adopting the above technical solution, the explosion-proof performance at the connection point is improved by using the plug-in fit between the explosion-proof sleeve and the explosion-proof ring. Furthermore, by using the primary explosion-proof cavity and the secondary explosion-proof cavity and their explosion-proof cover, on the one hand, the toothed drive component, the linkage limit component, and the electromagnetic telescopic component are provided with explosion-proof protection, and on the other hand, the toothed drive component, the linkage limit component, and the electromagnetic telescopic component can be detachably installed.

[0031] Preferably, the second connector is provided with a covering ring that fits into the end of the explosion-proof sleeve, and the covering ring is provided with a positioning groove that fits into the outer wall of the primary explosion-proof cavity.

[0032] By adopting the above technical solution, the sleeve fit between the covering ring and the explosion-proof sleeve achieves a further sealing function, thereby further improving the explosion-proof performance. In addition, the embedded fit between the positioning groove and the outer wall of the primary explosion-proof cavity also achieves a circumferential positioning function.

[0033] Preferably, the explosion-proof sleeve is provided with heat dissipation grooves.

[0034] By adopting the above technical solution, the heat dissipation grooves opened on the explosion-proof sleeve help to dissipate the heat generated at the connection between the charging plug and the charging socket, thus avoiding heat accumulation.

[0035] Preferably, the electromagnetic telescopic component includes an embedded frame, an electromagnetic coil fixed in the embedded frame, and an electromagnet telescopically disposed in the electromagnetic coil. The embedded frame is fixedly embedded in a secondary explosion-proof cavity. When current in different directions is applied to the electromagnetic coil, the telescopic state of the electromagnet is switched.

[0036] By adopting the above technical solution, the embedded frame is installed in the secondary explosion-proof cavity in an embedded manner. The installation method is simple and quick. Moreover, by applying current in different directions, the electromagnet's extension and retraction states can be switched. Compared with using springs or other elastic components to achieve reset, this method can ensure the stability of the two extension and retraction states.

[0037] Preferably, the second connector is provided with a telescopic hole in the secondary explosion-proof cavity, and the electromagnetic telescopic component further includes an extension body that is detachably disposed at the telescopic end of the electromagnet and serves as a limiting and locking function, and the extension body and the telescopic hole form a plug-in fit.

[0038] By adopting the above technical solution, an extension body that can be detachably set at the telescopic end of the electromagnet is used to connect and cooperate with the telescopic hole opened on the secondary explosion-proof cavity. In this way, the telescopic function of the electromagnetic telescopic component is set in the secondary explosion-proof cavity, so that it is not affected by the external environment and it is also convenient for the installation of the electromagnet.

[0039] Preferably, the end of the electromagnet near the first connecting body is T-shaped, one end of the extension body has a T-shaped through groove that fits into the T-shaped telescopic end of the electromagnet, and the other end of the extension body has a limiting and locking function.

[0040] By adopting the above technical solution, the end of the electromagnet near the first connecting body is set in a T-shape, so that it is embedded and matched with the T-shaped through groove, thereby realizing the detachable installation between the electromagnet and the extension body.

[0041] Preferably, the second connector is detachably provided with a single-head / multi-head cable connector.

[0042] By adopting the above technical solution and utilizing the detachable single / multi-head cable connector on the second connector, the charging device can be connected to a single or multiple-strand cable, thus improving its adaptability.

[0043] In summary, this application includes at least one of the following beneficial technical effects: 1. The linear meshing transmission between the toothed drive component and the meshing component, which serve as the driving source, assists in the connection between the first and second connecting bodies. Secondly, the linkage limiting component is used to achieve a mechanical locking function between the first and second connecting bodies on the one hand, and to achieve a locking function in the control room with the electromagnetic telescopic structure on the other hand, forming a double locking anti-detachment explosion-proof protection. 2. By utilizing the worm gear transmission formed between the drive worm sleeve and the toothed drive component, the toothed drive component is realized as a drive source. On the other hand, the self-locking capability of the worm gear itself is used to further improve the anti-detachment performance. 3. Through the worm gear transmission formed between the limiting worm and the toothed drive component, the toothed drive component can act as a driving source while also having a self-locking and anti-disengagement function. The threaded connection between the limiting worm and the first connecting body allows it to also function as a pin, and it can form a snap-fit ​​limiting fit with the electromagnetic telescopic component, achieving multiple uses in one piece and achieving the purpose of mechanical and electrical control room locking. Attached Figure Description

[0044] Figure 1 This is a partial cross-sectional view of the first embodiment of the application, which mainly illustrates the linkage locking connection mechanism. This state is the state in which the first connecting body and the second connecting body are disengaged. Figure 2 This is a partial cross-sectional view of the first embodiment of the application, which mainly illustrates the linkage locking connection mechanism. This state is when the second connector is inserted into the terminal of the second connector. Figure 3 The first embodiment of the application is a cross-sectional view mainly illustrating the linkage locking connection mechanism; Figure 4 This is a cross-sectional view of Embodiment 2 of the first application, mainly illustrating the structure of the drive worm gear sleeve and the toothed drive component; Figure 5 This is a cross-sectional view of Embodiment 3 of the first application, mainly illustrating the structure of the limiting worm gear and the toothed drive component; Figure 6This is a schematic diagram of the unidirectional rotational damper structure, which is the main embodiment of the fourth embodiment of the first application. Figure 7 This is an isometric schematic diagram of the first embodiment of the third application, mainly illustrating the explosion-proof charging equipment for mining. Figure 8 This is an isometric schematic diagram of the first and second connectors in the separated state of the explosion-proof charging equipment for mining in the third application, mainly showing the structure of the guide groove; Figure 9 This is an isometric schematic diagram of the first and second connectors in the mining explosion-proof charging equipment of the third application embodiment 1, showing the structure of the telescopic hole, the positioning groove and the extension body. Figure 10 This is a partial exploded view of the explosion-proof charging device for mining according to Embodiment 1 of the third application, mainly showing the structure of the primary explosion-proof cavity and the secondary explosion-proof cavity; Figure 11 This is a schematic diagram of the structure of the electromagnetic telescopic component in the explosion-proof charging equipment for mining, as shown in Embodiment 1 of the third application. Figure 12 This is a partial cross-sectional view of the explosion-proof charging device for mining according to the third application, mainly showing the structure of the plug-in hole and the snap-fit ​​hole; Figure 13 A partial cross-sectional view of Embodiment 2 of the third application for a mine explosion-proof charging device, which adopts the linkage locking mechanism of the first application; Figure 14 This is a partial cross-sectional view of Embodiment 3 of the third application for the explosion-proof charging equipment for mining, which adopts the linkage locking mechanism of Embodiment 3 of the first application.

[0045] Reference numerals: 1. First connector; 11. Guide groove; 12. First active drive unit; 13. Explosion-proof socket; 14. Explosion-proof sleeve; 141. Heat dissipation groove; 15. Primary explosion-proof cavity; 151. Insertion hole; 1512. Snap-fit ​​hole; 2. Second connector; 21. First pin groove; 22. Second pin groove; 221. Chamfer; 23. Explosion-proof plug; 24. Handheld part; 25. Single / multi-head cable connector; 26. Explosion-proof ring; 27. Secondary explosion-proof cavity; 28. Covering ring; 281. Positioning groove; 29. ​​Telescopic hole; 3. Primary mechanical locking assembly; 31. Toothed drive component; 32. Engaging component; 33. Linkage limiting component; 331. First pin structure; 3311. Abutment block; 3312, Limiting body; 3313, Snap-fit ​​groove; 332, First return spring; 333, Abutment seat; 3331, First limiting groove; 3332, Second limiting groove; 334, Drive worm sleeve; 3341, Second active drive part; 33414, Rotating part; 3343, First meshing part; 3344, Elastic groove; 335, Limiting worm; 3351, Third active drive part; 3352, Threaded connection part; 3353, Second meshing part; 4, Secondary electronically controlled locking assembly; 41, Electromagnetic telescopic component; 411, Embedded frame; 412, Electromagnetic coil; 413, Electromagnet; 414, Extension body; 4141, T-shaped through groove; 5, One-way rotation damper; 6, Insertion / removal gap; 7, Explosion-proof cover. Detailed Implementation

[0046] The following is in conjunction with the appendix Figure 1-14 This application will be described in further detail.

[0047] This application discloses a linkage locking connection mechanism, a charging unit, and a mine explosion-proof charging device, which includes a linkage locking connection mechanism as described in the first application, a charging unit as described in the second application, and a mine explosion-proof charging device as described in the third application.

[0048] The first application discloses a linkage locking connection mechanism.

[0049] Reference Figure 1 and Figure 2 The linkage locking connection mechanism includes a first connecting body 1 and a second connecting body 2 that form a plug-in fit, and also includes a primary mechanical locking component 3 and a secondary electronic locking component 4 disposed between the first connecting body 1 and the second connecting body 2, wherein the secondary electronic locking component 4 has a restrictive function on the primary mechanical locking component 3.

[0050] By utilizing a primary mechanical locking assembly 3 and a secondary electronic locking assembly 4, a dual locking function is achieved between the first connecting body 1 and the second connecting body 2, thereby improving the anti-detachment performance of the connecting mechanism.

[0051] Reference Figure 1 and Figure 2 The primary mechanical locking assembly 3 includes a toothed drive member 31, which serves as a drive source and is rotatably connected to the first connecting body 1 via a bearing, and a meshing member 32, which is fixedly disposed on the second connecting body 2 and forms a linear meshing transmission with the toothed drive member 31. The linear meshing transmission direction of the toothed drive member 31 and the meshing member 32 is parallel to the insertion direction of the second connecting body 2. In this embodiment, the toothed drive member 31 is configured as a drive gear, and the meshing member 32 is configured as a rack. To facilitate the alignment of the drive gear and the rack to form a meshing relationship, a guide groove 11 is provided on the first connecting body 1 along the insertion direction of the second connecting body 2 to form a guide and limiting cooperation with the meshing member 32. Reference Figure 1 and Figure 2 The outer side of the first connecting body 1 is rotatably provided with a first active driving part 12. In this embodiment of the application, the first active driving part 12 is set as an internal hexagon bolt head, which is coaxially and fixedly connected to the driving gear.

[0052] In actual use, the operator drives the head of the hexagonal bolt to rotate using an Allen wrench, which in turn drives the drive gear to rotate. The gear and rack transmission mechanism between the drive gear and the rack drives the second connector 2 to be passively inserted into the first connector 1, which plays an auxiliary insertion and removal function and helps to overcome the problem that the first connector 1 and the second connector 2 are heavy and difficult to insert and remove easily.

[0053] Reference Figure 1 and Figure 2 The primary mechanical locking assembly 3 also includes a linkage limiting component 33 disposed on the first connecting body 1. The linkage limiting component 33 forms a plug-in limiting cooperation with the second connecting body 2 to restrict the plugging and unplugging movement of the second connecting body 2, thereby realizing the primary mechanical locking function. This locking method can also maintain the locking state when the power is off.

[0054] Reference Figure 2 and Figure 3 The secondary electronic locking assembly 4 includes an electromagnetic telescopic component 41 disposed on the second connector 2. When current is applied to the electromagnetic telescopic component 41 in different directions, it can extend and reset. The electromagnetic telescopic component 41, the linkage limiting component 33, the toothed drive component 31, and the meshing component 32 are arranged sequentially along the direction close to the first connector 1. When the second connector 2 is inserted into the end of the first connector 1, the linkage limiting component 33 and the electromagnetic telescopic component 41, which is in the extended state after being energized, form a limiting engagement, thereby realizing the secondary electronic locking function.

[0055] That is, only by releasing the limiting engagement between the electromagnetic telescopic component 41 and the linkage limiting component 33 can the first-level mechanical locking function be released, thereby realizing the limiting function of the first-level mechanical locking component 3.

[0056] Reference Figure 2 and Figure 3 The linkage limiting component 33 includes a first pin structure 331 and a first return spring 332. The first pin structure 331 is rotatably inserted into the first connecting body 1, and the first return spring 332 is sleeved on the first pin structure 331. An abutment block 3311 is fixed on the first pin structure 331. The bottom end of the first return spring 332 forms an abutment engagement with the abutment block 3311, and the top of the first return spring 332 forms an abutment engagement with the first connecting body 1. Under the action of the elastic force 332, the first pin structure 331 is in an elongated state; the second connector 2 is provided with a first pin groove 21 that forms a plug-in limiting fit with the first pin structure 331, and the plug-in direction between the first pin structure 331 and the first pin groove 21 is perpendicular to the plug-in and pull-out direction of the second connector 2. In other embodiments, the plug-in direction between the first pin structure 331 and the first pin groove 21 can be set to be biased towards the second connector 2, and the deflection angle is set to an acute angle, which is more conducive to improving the anti-detachment performance.

[0057] Reference Figure 1 and Figure 2 The linkage limiting component 33 also includes an abutment seat 333 disposed on the first connecting body 1 and located at the rotatable insertion point of the first pin structure 331. The first connecting body 1 and the abutment seat 333 are sequentially inserted through the top of the first pin structure 331. The portion of the first pin structure 331 extending out of the first connecting body 1 is fixed with a limiting body 3312 perpendicularly disposed thereto. The abutment seat 333 has a first limiting groove 3331 and a second limiting groove 3332 with upward openings and different heights. The height of the first limiting groove 3331 is higher than the height of the second limiting groove 3332, and the first limiting groove 3331 and the second limiting groove 3332 are perpendicularly disposed between them.

[0058] Reference Figure 1 and Figure 2 When the first pin structure 331 rotates to the position of the limiting body 3312 in the first limiting groove 3331, the first pin structure 331 is in a contracted state, that is, the state of compressing the first return spring 332. In this state, the first pin structure 331 is disengaged from the first pin groove 21 so as not to prevent the insertion and removal process of the second connector 2. Reference Figure 2 and Figure 3 When the first pin structure 331 rotates to the position of the limiting body 3312 in the second limiting groove 3332, the first pin structure 331 returns to its initial elongated state under the action of elastic force, and when the second connecting body 2 is inserted into the end of the first connecting body 1, the first pin structure 331 in the elongated state forms a plug-in fit with the first pin groove 21.

[0059] Reference Figure 2 and Figure 3 The first pin structure 331 has a locking groove 3313 that forms a limiting engagement with the telescopic end of the electromagnetic telescopic component 41. The locking groove 3313 is an annular groove structure. When the second connector 2 is inserted into the end of the first connector 1, the telescopic end of the electromagnetic telescopic component 41 and the locking groove 3313 form a locking engagement, thereby realizing the limiting effect of the secondary electronic locking function on the primary mechanical locking function.

[0060] The implementation principle of the linkage locking connection mechanism and charging device in this application embodiment is as follows: During insertion and removal operations, the operator can use the first active drive unit 12 to drive the drive gear to rotate. By utilizing the meshing between the drive gear and the rack, the rotation method can replace the linear insertion and removal operation, which is more labor-saving and assists in the insertion and removal operation between the first connector 1 and the second connector 2. When the second connector 2 is inserted into the terminal of the first connector 1, a first-level mechanical locking operation and a second-level electronic locking operation are performed in sequence. In the first-level mechanical locking operation, when the operator rotates the first pin structure 331 until the limiting body 3312 is located in the second limiting groove 3332, the first pin structure 331 is subjected to elastic force and forms a plug-in engagement with the first pin groove 21. That is, once the limiting body 3312 falls into the second limiting groove 3332, it marks the completion of the first-level mechanical locking state. In the secondary electric locking operation, the electromagnetic telescopic part is extended after being energized, so that it forms a locking and limiting engagement with the locking groove 3313 on the first pin structure 331, thereby completing the secondary electric locking operation.

[0061] It utilizes a primary mechanical locking mechanism and a secondary electrical control mechanism to achieve a dual locking function, thereby enhancing the anti-detachment and explosion-proof capabilities.

[0062] Example 2 Reference Figure 4 The difference between this embodiment and Embodiment 1 is that... Reference Figure 4The linkage limiting component 33 also includes a drive worm sleeve 334 rotatably mounted on the first connecting body 1. The drive worm sleeve 334, from top to bottom, includes a second active drive part 3341 extending out of the first connecting body 1, a rotating part 33414 rotatably connected to the first connecting body 1, and a first meshing part 3343 forming a worm gear transmission with the toothed drive member 31. In this embodiment, the second active drive part 3341 is configured as an external hexagonal bolt head structure, which can cooperate with a hexagonal wrench. The helix angle of the first meshing part 3343 of the drive worm sleeve 334 is smaller than the equivalent friction angle between the first meshing part 3343 of the drive worm sleeve 334 and the meshing teeth of the toothed drive member 31, giving it a self-locking function. That is, only by driving the second active drive part 3341 can the toothed drive member 31 be rotated. In actual use, the transmission ratio between the first meshing part 3343 and the toothed drive member 31 can be reasonably set to achieve the function of saving effort.

[0063] Reference Figure 4 The first pin structure 331 passes through the drive worm sleeve 334 and forms a rotatable insertion engagement with it. The drive worm sleeve 334 has an elastic groove 3344 with an opening facing downward along its axis. The first return spring 332 is located in the elastic groove 3344. The bottom end of the first return spring 332 abuts against the abutting block 3311, and the top end of the first return spring 332 abuts against the bottom wall of the elastic groove 3344. Reference Figure 4 In this embodiment, the first limiting groove 3331 and the second limiting groove 3332 are both opened on the second active driving part 3341 of the driving worm sleeve 334. The connection relationship between the first limiting groove 3331 and the second limiting groove 3332 and the limiting on the first pin structure 331, as well as the connection and cooperation, and the connection relationship between the structure of the snap-fit ​​groove 3313 and the electromagnetic telescopic component 41 are the same as in embodiment 1.

[0064] The implementation principle of Example 2 is as follows: A drive worm sleeve 334 is fitted onto the first pin structure 331, retaining the insertion and limiting function between the first pin structure 331 and the second connector 2, as well as the snap-fit ​​limiting function between the first pin structure 331 and the electromagnetic telescopic component 41. This adds the function of the worm gear driving the toothed drive component 31 to rotate, and the drive source is transferred to the drive worm sleeve 334. On the one hand, the toothed drive component 31 is realized as a drive source, and on the other hand, differential transmission is realized to achieve the function of saving effort.

[0065] Example 3 Reference Figure 5 The difference between this embodiment and Embodiment 1 is that... Reference Figure 5The linkage limiting component 33 includes a limiting worm 335 threadedly connected to the first connecting body 1. While rotating, the limiting worm 335 can also move along its axis on the first connecting body 1. Along its axis, from top to bottom, the limiting worm 335 has a third active drive part 3351 extending out of the first connecting body 1, a threaded connection part 3352 threadedly connected to the first connecting body 1, and a second meshing part 3353 forming a worm gear transmission with the toothed drive member 31. The helix angle of the second meshing part 3353 of the limiting worm 335 is smaller than the equivalent friction angle between the meshing teeth of the second meshing part 3353 of the limiting worm 335 and the toothed drive member 31, giving it a self-locking function and improving its anti-disengagement performance.

[0066] Reference Figure 5 The second active drive unit 3341 can be configured as a hexagonal bolt head structure to cooperate with a wrench, thereby driving the limiting worm 335 to rotate. The threaded connection part 3352 enables the limiting worm 335 to rotate and also allows for its axial movement. The second connecting body 2 has a second pin groove 22 that forms an insertion limiting fit with the bottom end of the limiting worm 335. In order to enable the limiting worm 335 to properly insert into the first pin groove 21, the second pin groove 22 has a chamfer 221 on its periphery. The second meshing part 3353 and the toothed part are used to engage with the limiting worm 335. The worm gear transmission between the drive components 31 enables the toothed drive component 31 to rotate and achieves differential transmission. At the same time, when the second connector 2 is inserted into the end of the first connector 1, the bottom end of the limiting worm 335 forms a plug-in limiting fit with the second pin groove 22 on the second connector 2 to restrict the movement of the second connector 2 and achieve a first-level mechanical locking function. The extended end of the electromagnetic telescopic component 41 forms a snap-fit ​​limiting fit with the external helical teeth of the second meshing part 3353 to achieve a second-level electronic locking function.

[0067] Example 4 Reference Figure 6 The difference between this embodiment and Embodiments 1, 2, and 3 is that... Reference Figure 6 A one-way rotation damper 5 is provided at the rotational connection between the toothed drive member 31 and the first connecting body 1. In this embodiment, the one-way rotation damper 5 can be set as a one-way damping bearing. During the process of the second connecting body 2 disengaging from the first connecting body 1, the toothed drive member 31 is subjected to anti-rotation damping by the one-way damping bearing, making it difficult for the second connecting body 2 to be easily pulled out. It is necessary to overcome a certain force to pull it out. The magnitude of this force is set within the range that can be easily applied by human force, which further plays the role of preventing disengagement.

[0068] The second application discloses a charging unit.

[0069] The charging unit adopts the linkage locking connection mechanism in Embodiment 1, Embodiment 2, Embodiment 3, or Embodiment 4. The first connecting body 1 is set as any charging socket, and the second connecting body 2 is set as a charging plug that forms a plug-in cooperation with the charging socket. Thus, the linkage locking connection structure can be used in charging units in any field, greatly improving the anti-disconnection performance between the charging units.

[0070] The third application discloses an explosion-proof charging device for mining.

[0071] Example 1 Reference Figure 7 The explosion-proof charging equipment for mining includes the charging unit in the second application and adopts Embodiment 1 of the linkage locking mechanism in the first application. The second connecting body 2 also includes a handheld part 24 fixedly connected to the charging plug and a single / multi-head cable connector 25 detachably installed on the handheld part 24 away from the charging plug. This application adopts a four-head cable connector.

[0072] Reference Figure 8 and Figure 9 The charging socket and charging plug are respectively configured as a cylindrical multi-hole explosion-proof socket 13 and a cylindrical multi-plug explosion-proof plug 23 for connecting explosion-proof charging cables for mining. To improve the overall explosion-proof performance, the first connecting body 1 also includes an explosion-proof sleeve 14 coaxially fixedly installed on the periphery of the explosion-proof socket 13. The second connecting body 2 also includes an explosion-proof ring 26 coaxially fixedly installed on the periphery of the explosion-proof plug 23. During actual insertion and removal, the explosion-proof ring 26 is inserted into the insertion and removal gap 6 formed between the explosion-proof sleeve 14 and the explosion-proof socket 13 to form a gap insertion fit. The size of the insertion and removal gap 6 is set to meet the insertion gap requirements of explosion-proof mining.

[0073] Reference Figure 8 and Figure 9 To improve the heat dissipation at the connection between the explosion-proof plug 23 and the explosion-proof socket 13, the explosion-proof sleeve 14 has waist-shaped heat dissipation grooves 141 that are symmetrically arranged on both sides in a horizontal radial direction.

[0074] Reference Figure 8 and Figure 9 The first connector 1 is integrally formed on the upper radial side of the explosion-proof sleeve 14, with an upward-facing cuboid-shaped primary explosion-proof cavity 15. The second connector 2 is integrally formed between the handheld part 24 and the explosion-proof plug 23, with an upward-facing secondary explosion-proof cavity 27. Both the explosion-proof cavity and the secondary explosion-proof cavity 27 are sealed with explosion-proof sealing rings and explosion-proof caps 7.

[0075] Reference Figure 9 and Figure 10The toothed drive component 31 and the linkage limiting component 33 are both installed in the primary explosion-proof cavity 15, the meshing component 32 is installed on one side of the vertical diameter of the explosion-proof ring 26, and the electromagnetic telescopic component 41 is installed in the secondary explosion-proof cavity 27, which achieves the explosion-proof effect.

[0076] Reference Figure 9 and Figure 10 The second connector 2 is also provided with a covering ring 28. The covering ring 28 is located at the end of the explosion-proof ring 26 away from the explosion-proof socket 13 and forms a sleeve fit with the end of the explosion-proof sleeve 14. The covering ring 28 is provided with a positioning groove 281 that forms an embedded fit with the outer wall of the primary explosion-proof cavity 15, thereby playing a circumferential limiting role for the second connector 2 after insertion.

[0077] Reference Figure 10 and Figure 11 The electromagnetic telescopic component 41 includes an embedded frame 411, an electromagnetic coil 412 fixed in the embedded frame 411, and a long rod-shaped electromagnet 413 telescopically disposed in the electromagnetic coil 412. The width of the embedded frame 411 is slightly larger than the width of the secondary explosion-proof cavity 27, until the embedded frame 411 is precisely embedded in the secondary explosion-proof cavity 27 to achieve the effect of embedding and fixing. This installation method is convenient and quick. The working mode of the electromagnetic telescopic component 41 is that when the electromagnetic coil 412 is connected to current in different directions, the telescopic state of the electromagnet 413 is switched. That is, by controlling the direction of current flow, the telescopic state of the electromagnet 413 is switched. There is no need to use elastic elements such as a return spring for reset, and the stability of the telescopic state can be maintained.

[0078] Reference Figure 9 and Figure 12 The second connecting body 2 has a telescopic hole 29 on the side near the first connecting body 1, which communicates with the secondary explosion-proof cavity 27. The electromagnetic telescopic component 41 also includes an extension body 414 detachably mounted on the telescopic end of the electromagnet 413 for a limiting and locking function. The extension body 414 and the telescopic hole 29 form a plug-in fit. The end of the electromagnet 413 near the first connecting body 1 is T-shaped. One end of the extension body 414 has a T-shaped through groove 4141 that fits into the T-shaped telescopic end of the electromagnet 413. The other end of the extension body 414 serves a limiting and locking function. That is, as the electromagnet 413 telescopically moves, it drives the extension body 414 to telescopically move within the telescopic hole 29, thus achieving a limiting and locking function. This split design facilitates the installation of the electromagnetic telescopic component 41 and makes full use of the installation space.

[0079] Reference Figure 9 and Figure 12The telescopic hole 29 is located in the positioning groove 281, and the actual limiting and locking position of the first connecting body 1 and the second connecting body 2 is set between the positioning groove 281 and the first explosion-proof cavity 15 to prevent the telescopic movement of the electromagnetic telescopic component 41 from being interfered with by the external environment.

[0080] Reference Figure 8 and Figure 12 The toothed drive member 31, which is configured as a drive gear, is located in the primary explosion-proof cavity 15 and is rotatably connected to it through a bearing. The bottom of the drive gear in the vertical diameter direction is located in the insertion gap 6. The drive gear and the meshing member 32, which is configured as a rack, form a gear and rack transmission. The first active drive unit 12 is disposed on the side wall in the width direction of the primary explosion-proof cavity 15 and is coaxially connected to the drive gear, thereby driving the drive gear to rotate. The guide groove 11 is opened at the bottom of the primary explosion-proof cavity 15 and communicates with the insertion gap 6.

[0081] Reference Figure 10 and Figure 12 The explosion-proof cavity 15 is provided with a insertion hole 151. The first pin structure 331 and the first return spring 332 sleeved on the first pin structure 331 are both located in the insertion hole 151. The top of the first pin structure 331 is provided with an explosion-proof cover 7, and the top of the first return spring 332 forms an abutment fit with the explosion-proof cover 7, thereby realizing the elastic movement of the first pin structure 331. The first pin groove 21 is opened at the top of the vertical diameter of the explosion-proof ring 26 and is located at the end of the rack. Reference Figure 12 The abutment seat 333 is fixed on the explosion-proof cover 7 and is located at the penetration point of the first pin structure 331 in the explosion-proof cover 7; the first explosion-proof cavity has a snap-fit ​​hole 1512 that communicates with the insertion hole 151 on the side near the second connector 2. The snap-fit ​​hole 1512 forms an insertion fit with the extension body 414. When the explosion-proof plug 23 is inserted into the end of the explosion-proof socket 13, the snap-fit ​​hole 1512 communicates with the snap-fit ​​groove 3313 on the first pin structure 331. Then, when the electromagnet 413 of the electromagnetic telescopic component 41 extends, the snap-fit ​​hole 1512 inserted into the first explosion-proof cavity 15 forms a snap-fit ​​limiting fit with the snap-fit ​​groove 3313 on the first pin structure 331.

[0082] Example 2 Reference Figure 13 This embodiment adopts Embodiment 2 of the linkage locking mechanism in the first application, which differs from Embodiment 1 of the third application in that...

[0083] Reference Figure 13The drive worm sleeve 334 is located in the insertion hole 151, and the second active drive part 3341 of the drive worm sleeve 334 extends out of the explosion-proof cover 7. The rotating part 33414 is rotatably connected to the explosion-proof cover 7 through a bearing. The first connecting body 1 is located on the side of the insertion hole 151 near the toothed drive member 31 and is connected to the space where the toothed drive member is stored. This ensures that the first meshing part 3343 of the drive worm sleeve 334 and the toothed drive member 31 form a worm gear transmission.

[0084] Example 3 Reference Figure 14 This embodiment adopts Embodiment 3 of the linkage locking mechanism in the first application, which differs from Embodiment 2 of the third application in that...

[0085] Reference Figure 14 The threaded connection portion 3352 of the limiting worm 335 is threadedly connected to the explosion-proof cover 7, and the second pin groove 22 is opened on the explosion-proof ring body 26. In this embodiment, no pin structure is used. During the rotation of the limiting worm 335, the second meshing portion 3353 of the limiting worm 335 realizes the worm gear transmission between the limiting worm 335 and the toothed drive member 31. As the limiting worm 335 moves axially, the bottom end of the limiting worm 335 forms a plug-in limiting fit with the second pin groove 22. When the secondary electronic locking is performed, the extension body 414 passes through the snap-fit ​​hole 1512 and forms a snap-fit ​​limiting fit with the external helical teeth of the second meshing portion 3353 of the limiting worm 335.

[0086] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A linkage locking connection mechanism, characterized in that: It includes a first connecting body (1), a toothed drive member (31) that is rotatably disposed on the first connecting body (1) as a drive source, and a linkage limiting member (33) disposed on the first connecting body (1). It also includes a second connector (2), an electromagnetic telescopic component (41) disposed on the second connector (2), and a meshing component (32) fixedly disposed on the second connector (2) to form a linear meshing transmission with the toothed drive component (31), and the linear meshing transmission direction of the toothed drive component (31) and the meshing component (32) is parallel to the insertion direction of the second connector (2). When the second connector (2) is inserted into the terminal of the first connector (1), the linkage limiting component (33) forms an insertion limiting engagement with the second connector (2), and the linkage limiting component (33) also forms a limiting snap engagement with the energized electromagnetic telescopic component (41). The linkage limiting component (33) includes a first pin structure (331) elastically disposed on the first connecting body (1), a first pin groove (21) formed with the first pin structure (331) in a plug-in engagement, and a snap-fit ​​groove (3313) formed with the electromagnetic telescopic component (41) in a limiting engagement. The first pin structure (331) is rotatably inserted into the first connector (1). A limiting body (3312) is fixedly provided on one side of the first pin structure (331) extending out of the first connector (1). The first connector (1) is provided with a first limiting groove (3331) and a second limiting groove (3332) of different heights at the rotatable insertion point of the first pin structure (331). When the first pin structure (331) rotates to the position where the limiting body (3312) is in the first limiting groove (3331), the first pin structure (331) is in the state of being disengaged from the first pin groove (21); When the first pin structure (331) rotates to the position of the limiting body (3312) in the second limiting groove (3332), the first pin structure (331) is in an elongated state under the action of elastic force, and when the second connecting body (2) is inserted into the end of the first connecting body (1), the first pin structure (331) in the elongated state forms a plug-in fit with the first pin groove (21).

2. The linkage locking connection mechanism according to claim 1, characterized in that: The first connecting body (1) is provided with a first active driving part (12) on its outer side, and the first active driving part (12) is coaxially and fixedly connected with the toothed driving member (31).

3. The linkage locking connection mechanism according to claim 2, characterized in that: The linkage limiting component (33) further includes a drive worm sleeve (334) rotatably connected to the first connecting body (1). The first pin structure (331) is elastically inserted into the drive worm sleeve (334). The drive worm sleeve (334) and the toothed drive member (31) form a worm gear transmission. The drive worm sleeve (334) extends out of the first connecting body (1) and forms a second active drive part (3341).

4. The linkage locking connection mechanism according to claim 1, characterized in that: The linkage limiting component (33) includes a limiting worm (335) threadedly connected to the first connecting body (1). The limiting worm (335) and the toothed drive component (31) form a worm gear transmission. The limiting worm (335) extends out of the first connecting body (1) and is provided with a third active drive part (3351). The electromagnetic telescopic component (41) and the external helical teeth of the limiting worm (335) form a snap-fit ​​limiting fit. When the second connecting body (2) is inserted into the end of the first connecting body (1), the limiting worm (335) and the second connecting body (2) form an insertion limiting fit.

5. The linkage locking connection mechanism according to claim 1, characterized in that: The first connecting body (1) has a guide groove (11) that forms a guide and limit fit with the meshing part (32).

6. The linkage locking connection mechanism according to claim 1, characterized in that: A one-way rotation damper (5) is provided at the rotational connection between the toothed drive member (31) and the first connecting body (1). During the process of the second connecting body (2) disengaging from the first connecting body (1), the toothed drive member (31) is subjected to anti-rotation damping.

7. The linkage locking connection mechanism according to claim 3, characterized in that: The helix angle of the drive worm sleeve (334) is smaller than the equivalent friction angle between the drive worm sleeve (334) and the meshing teeth of the toothed drive member (31).

8. The linkage locking connection mechanism according to claim 4, characterized in that: The helix angle of the limiting worm (335) is less than the equivalent friction angle between the limiting worm (335) and the meshing teeth of the toothed drive (31).

9. A charging unit, characterized in that, The invention includes a linkage locking connection mechanism as described in any one of claims 1-8, wherein the first connector (1) is configured as a charging socket and the second connector (2) is configured as a charging plug.

10. A mine explosion-proof charging device, characterized in that, The first connector (1) further includes an explosion-proof sleeve (14) disposed around the charging socket, and the second connector (2) further includes an explosion-proof ring (26) disposed around the charging plug. The explosion-proof sleeve (14) and the explosion-proof ring (26) form a gap-fitted insertion fit. The explosion-proof sleeve (14) is provided with a primary explosion-proof cavity (15). The toothed drive member (31) and the linkage limiting member (33) are both disposed in the primary explosion-proof cavity (15), and the meshing member (32) is disposed on the explosion-proof ring (26). It also includes a secondary explosion-proof cavity (27) disposed on the charging plug, wherein the electromagnetic telescopic component (41) is disposed in the secondary explosion-proof cavity (27); The primary explosion-proof cavity (15) and the secondary explosion-proof cavity (27) are sealed with explosion-proof covers (7).

11. A mine explosion-proof charging device according to claim 10, characterized in that, The second connector (2) is provided with a covering ring (28) that forms a sleeve fit with the end of the explosion-proof sleeve (14), and the covering ring (28) is provided with a positioning groove (281) that forms an embedded fit with the outer wall of the primary explosion-proof cavity (15).

12. A mine explosion-proof charging device according to claim 11, characterized in that, The explosion-proof sleeve (14) is provided with heat dissipation grooves (141).

13. A mine explosion-proof charging device according to claim 12, characterized in that, The electromagnetic telescopic component (41) includes an embedded frame (411), an electromagnetic coil (412) fixed in the embedded frame (411), and an electromagnet (413) telescopically disposed in the electromagnetic coil (412). The embedded frame (411) is fixedly embedded in the secondary explosion-proof cavity (27). When current in different directions is passed through the electromagnetic coil (412), the telescopic state of the electromagnet (413) is switched.

14. A mine explosion-proof charging device according to claim 13, characterized in that, The second connector (2) is located in the secondary explosion-proof cavity (27) and has a telescopic hole (29). The electromagnetic telescopic component (41) also includes an extension body (414) that is detachably installed at the telescopic end of the electromagnet (413) to provide a limiting and locking function. The extension body (414) and the telescopic hole (29) form a plug-in fit.

15. A mine explosion-proof charging device according to claim 14, characterized in that, The electromagnet (413) is T-shaped at one end near the first connector (1), and the extension body (414) has a T-shaped through groove (4141) at one end that is embedded and matched with the T-shaped telescopic end of the electromagnet (413). The other end of the extension body (414) serves as a limiting and locking function.

16. A mine explosion-proof charging device according to claim 15, characterized in that, The second connector (2) is detachably provided with a single-head / multi-head cable connector (25).

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