Safety lock device

Abstract

The utility model relates to the technical field of equipment safety, in particular to a safety lock device which comprises a shell, a first safety lock, a second safety lock, a gear adjusting piece, an expansion connecting piece and a third safety lock. Then the first safety lock is inserted, the first safety lock is rotated to start the maintenance mode and is pulled out, each operator entering the equipment connects a third safety lock to the expansion connecting piece and takes down the third safety lock from the expansion connecting piece when leaving the equipment, and through the arrangement of the expansion connecting piece, it can be judged that an operator does not leave the equipment when the third safety lock exists; the mechanical injury risk is avoided, and the equipment safety is improved; moreover, by arranging the two safety locks, the first safety lock and the second safety lock need to be operated respectively when the equipment is restarted, the mechanical injury risk can be avoided even if the second safety lock is operated by mistake, and the safety of the equipment is improved.

Description

Technical Field

[0001] The present application relates to the field of equipment safety technology, and in particular to a safety lock device. Background Art

[0002] At present, the safety measures of automation equipment generally consist of safety doors, safety gratings, emergency stop buttons, and maintenance key switches. When the equipment is repaired or cleaned, an operator usually turns the maintenance knob to the maintenance mode and takes the maintenance key away for safekeeping, then opens the safety door to perform maintenance or cleaning operations. When multiple operators are required to collaborate to complete the task, the only person who is truly safe is the one who keeps the maintenance key; if the operator who keeps the maintenance key mistakenly closes the safety door and starts the equipment without noticing that other collaborators are working inside, other collaborators will be at risk of mechanical injury, which is not conducive to improving the safety of equipment maintenance. Utility Model Content

[0003] In view of the above problems, an embodiment of the present application provides a safety lock device to solve the above-mentioned technical problem of how to improve the safety of equipment maintenance.

[0004] In a first aspect, an embodiment of the present application provides a safety lock device, comprising:

[0005] A shell, the shell comprising a first opening and at least one first fixing portion provided on an outer wall of the shell;

[0006] a first safety lock disposed in the housing, the first safety lock comprising a first lock body having a first mounting cavity and a first adjustment shaft rotatably disposed in the first mounting cavity, the first mounting cavity being opposite to the first opening;

[0007] a gear position adjusting member penetrating through the first opening and inserted into the first adjusting shaft, and used for adjusting the circumferential rotation position of the first adjusting shaft;

[0008] A second safety lock disposed outside the housing, the second safety lock comprising a second lock body having a second mounting cavity and a second adjustment shaft rotatably disposed in the second mounting cavity, the gear position adjustment member being inserted into the second adjustment shaft to adjust the circumferential rotation position of the second adjustment shaft;

[0009] An extension connector detachably connected to the first fixing portion, wherein the extension connector is used for detachably connecting a third safety lock.

[0010] Optionally, the first safety lock also includes a first contact portion arranged at an end of the first adjustment shaft away from the first opening, and a first electrode terminal and a second electrode terminal respectively arranged on the first lock body, and the first electrode terminal and the second electrode terminal are spaced apart on a rotation trajectory of the first contact portion; when the first contact portion rotates to a first gear position, the first contact portion abuts against the first electrode terminal; when the first contact portion rotates to a second gear position, the first contact portion abuts against the second electrode terminal.

[0011] Optionally, the second safety lock also includes a second contact portion provided at an end of the second adjustment shaft away from the gear adjustment member, and a third electrode terminal and a fourth electrode terminal respectively provided on the second lock body, and the third electrode terminal and the fourth electrode terminal are spaced apart on the rotation trajectory of the second contact portion; when the second contact portion rotates to the third gear position, the second contact portion abuts against the third electrode terminal; when the second contact portion rotates to the fourth gear position, the second contact portion abuts against the fourth electrode terminal.

[0012] Optionally, the extended connector includes a connecting portion detachably connected to the first fixing portion and a plurality of second fixing portions.

[0013] Optionally, the second fixing portion is a connecting through hole opened on the extended connecting member.

[0014] Optionally, the third safety lock is a padlock, and the padlock is detachably connected to the extension connector.

[0015] Optionally, a plurality of the third safety locks are provided, and different third safety locks are adapted to have different safety keys.

[0016] Optionally, the gear adjustment member includes a column portion inserted into the first adjustment shaft or the second adjustment shaft and a handle portion connected to the column portion.

[0017] Optionally, the column portion is provided with at least one strip-shaped groove, and the first adjustment shaft or the second adjustment shaft is provided with an insertion protrusion that matches the strip-shaped groove.

[0018] Optionally, the safety lock device also includes a controller, which is electrically connected to the first electrode terminal, the second electrode terminal, the third electrode terminal and the fourth electrode terminal, respectively, and is used to output a first control signal corresponding to the first gear position, a second control signal corresponding to the second gear position, a third control signal corresponding to the third gear position, or a fourth control signal corresponding to the fourth gear position.

[0019] The safety lock device provided in the embodiment of the present application includes a shell, the shell includes a first opening and at least one first fixing portion arranged on the outer wall of the shell; a first safety lock arranged in the shell, the first safety lock includes a first lock body with a first installation cavity and a first adjustment shaft rotatable in the first installation cavity, the first installation cavity is opposite to the first opening; a gear adjustment member inserted in the first adjustment shaft through the first opening, used for adjusting the circumferential rotation position of the first adjustment shaft; a second safety lock arranged outside the shell, the second safety lock includes a second lock body with a second installation cavity and a second adjustment shaft rotatable in the second installation cavity, the gear adjustment member is inserted in the second adjustment shaft to adjust the circumferential rotation position of the second adjustment shaft; a detachable An extended connector connected to the first fixed part, the extended connector is used to connect a third safety lock; through the above method, when the equipment needs maintenance, the gear adjustment member is inserted into the second safety lock, rotated to stop the equipment and then pulled out, and then the first safety lock is inserted and rotated to start the maintenance mode and pulled out. Each operator entering the equipment connects the third safety lock to the extended connector respectively, and removes the third safety lock from the extended connector when leaving the equipment. Through the setting of the extended connector, it can be judged that an operator has not left the equipment when the third safety lock exists, thereby avoiding the risk of mechanical injury, which is beneficial to improving the safety of the equipment; and, by setting two safety locks, the first safety lock and the second safety lock need to be operated separately when restarting the equipment. Even if the second safety lock is operated by mistake, the risk of mechanical injury can be avoided, which is beneficial to improving the safety of the equipment.

[0020] These and other aspects of the present application will become more clearly understood in the description of the following embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A partial structural schematic diagram of a safety lock device provided in an embodiment of the present application is shown.

[0022] Figure 2 A structural exploded view of a housing and a first safety lock in a safety lock device provided in an embodiment of the present application is shown.

[0023] Figure 3 A structural exploded view of a second safety lock in a safety lock device provided in an embodiment of the present application is shown.

[0024] Figure 4 A schematic structural diagram of an extended connector in a safety lock device provided in an embodiment of the present application is shown.

[0025] Figure 5 A schematic structural diagram of a third safety lock in the safety lock device provided in an embodiment of the present application is shown.

[0026] The meanings of the symbols in the accompanying drawings are:

[0027] 10-shell; 11-first opening; 12-first fixing member; 13-accommodating cavity; 14-cover body; 15-transparent window; 20-first safety lock; 21-first lock body; 211-first installation cavity; 22-first adjusting shaft; 22a-first plug-in protrusion; 23-first contact portion; 241-first electrode terminal; 242-second electrode terminal; 30-second safety lock; 31-second lock body; 311-second installation cavity; 32-second adjusting shaft; 32a-second plug-in protrusion; 33-second contact portion; 341-third electrode terminal; 342-fourth electrode terminal; 40-gear adjustment member; 41-column portion; 411-strip groove; 42-handle portion; 50-extension connector; 60-third safety lock. DETAILED DESCRIPTION

[0028] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0029] In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0030] In the embodiments of the present application, it should be noted that, in this article, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0031] Moreover, the terms "comprises," "comprising," or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0032] In the description of the embodiments of the present application, words such as "example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "example" or "for example" in the embodiments of the present application is not to be interpreted as being more preferred or having more advantages than another embodiment or design. The use of words such as "example" or "for example" is intended to present relative concepts in a clear manner.

[0033] In addition, the "plurality" in the embodiments of the present application refers to two or more than two. In view of this, in the embodiments of the present application, "plurality" can also be understood as "at least two". "At least one" can be understood as one or more, for example, one, two or more. For example, including at least one means including one, two or more, and there is no limit on which ones are included. For example, including at least one of A, B and C, then A, B, C, A and B, A and C, B and C, or A, B and C can be included.

[0034] It should be noted that, in the embodiments of the present application, "and / or" describes the association relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / ", unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship.

[0035] It should be noted that in the embodiments of the present application, "connection" can be understood as electrical connection or mechanical connection, and the connection between two parts can be a direct or indirect connection between the two parts. For example, the connection between A and B can be either a direct connection between A and B or an indirect connection between A and B through one or more other components.

[0036] An embodiment of the present application provides a safety lock device, see Figures 1 to 4 As shown, the safety lock device of this embodiment includes: a housing 10, a first safety lock 20, a second safety lock 30, a gear adjustment member 40, an extension connection member 50 and a third safety lock 60.

[0037] The housing 10 includes a first opening 11, and the housing 10 also includes at least one first fixing portion 12, and the at least one first fixing portion 12 is disposed on the outer wall of the housing 10. The expansion connector 50 is detachably connected to the first fixing portion 12.

[0038] The first safety lock 20 is disposed inside the housing 10, and the second safety lock 30 is disposed outside the housing 10. The first safety lock 20 and the second safety lock 30 are independent of each other.

[0039] The first safety lock 20 includes a first lock body 21 disposed on the housing 10 and a first adjustment shaft 22 disposed in the first lock body 21. The first lock body 21 has a first installation cavity 211. The first adjustment shaft 22 can be rotatably disposed in the first installation cavity 211. The first installation cavity 211 is opposite to the first opening 11. The gear adjustment member 40 can be inserted into the first adjustment shaft 22 through the first opening 11. The first adjustment shaft 22 can be rotated circumferentially by rotating the gear adjustment member 40 to adjust the circumferential rotation position of the first adjustment shaft 22. Exemplarily, the first safety lock 20 can be used as a maintenance lock, and different circumferential rotation positions can correspond to different switch states. When the first adjustment shaft 22 is in the first rotation position, it corresponds to the non-maintenance state (operable state) of the device; when the first adjustment shaft 22 is in the second rotation position, it corresponds to the maintenance state (stopped operation state) of the device.

[0040] The second safety lock 30 is installed at a location that can be close to or far from the housing 10 and the first safety lock 20. The second safety lock 30 can have a similar structure to the first safety lock 20. The second safety lock 30 includes a second lock body 31 and a second adjustment shaft 32 disposed in the second lock body 31. The second lock body 31 has a second installation cavity 311. The second adjustment shaft 32 can be circumferentially rotated in the second installation cavity 311. The gear adjustment member 40 can be inserted into the second adjustment shaft 32. By rotating the gear adjustment member 40, the second adjustment shaft 32 can be circumferentially rotated to adjust the circumferential rotation position of the second adjustment shaft 32. Exemplarily, the second safety lock 30 can be used as an operating lock, and different circumferential rotation positions can correspond to different switch states. When the second adjustment shaft 32 is located at the third rotation position, it corresponds to the operable state of the device; when the second adjustment shaft 32 is located at the fourth rotation position, it corresponds to the stopped operation state of the device.

[0041] The gear adjustment member 40 can be used as a key for the first safety lock 20 and the second safety lock 30 respectively.

[0042] In an optional application scenario of the safety lock device, the first adjustment shaft 22 of the first safety lock 20 is located at the second rotation position, and the device is in a maintenance state (stopped operation state); the second adjustment shaft 32 of the second safety lock 30 is located at the fourth rotation position, and the device is in a stopped operation state. The first adjustment shaft 22 of the first safety lock 20 is located at the first rotation position, and the device is in a non-maintenance state (operable state); the second adjustment shaft 32 of the second safety lock 30 is located at the third rotation position, and the device is in an operable state. Further, the device control mode can be configured as follows: the first adjustment shaft 22 of the first safety lock 20 is located at the second rotation position, or the second adjustment shaft 32 of the second safety lock 30 is located at the fourth rotation position, and the device stops running; the first adjustment shaft 22 of the first safety lock 20 is located at the first rotation position and the second adjustment shaft 32 of the second safety lock 30 is located at the third rotation position, and the device runs.

[0043] Among them, the operator's third safety lock 60 can be connected to the extension connector 50. When the operator enters the equipment to perform maintenance work, the third safety lock 60 is connected to the extension connector 50; when the operator leaves the equipment, the third safety lock 60 connected to the extension connector 50 is removed; the third safety lock 60 can remind other personnel that there is an operator in the equipment. When no third safety lock 60 is connected to the extension connector 50, the equipment can be restarted.

[0044] In an optional application scenario of the safety lock device, when equipment maintenance is required, the following operations are performed in sequence: first, the second adjustment shaft 32 of the second safety lock 30 is rotated to the fourth rotation position using the gear adjustment member 40, and the equipment is in a stopped state; then, the gear adjustment member 40 is pulled out from the second adjustment shaft 32; then, the first adjustment shaft 22 of the first safety lock 20 is rotated to the second rotation position using the gear adjustment member 40, and the equipment is in a maintenance state. The gear adjustment member 40 is kept inserted into the first adjustment shaft 22, and the first operator connects the third safety lock 60 to the extension connector 50 and enters the equipment; subsequently, the second operator to the Nth operator respectively connect the third safety lock 60 to the extension connector 50 and enter the equipment.

[0045] In an optional application scenario of the safety lock device, when the equipment needs to be operated after maintenance is completed, the following operations are performed in sequence: first, when the operator leaves the equipment, the third safety lock 60 connected to the extension connector 50 is removed; then, when the last operator removes the third safety lock 60, the gear adjustment member 40 is used to rotate the first adjustment shaft 22 of the first safety lock 20 to the first rotation position, the equipment is in a non-maintenance state, and the gear adjustment member 40 is pulled out from the first adjustment shaft 22; then, the gear adjustment member 40 is used to rotate the second adjustment shaft 32 of the second safety lock 30 to the third rotation position, the equipment starts to run, and the gear adjustment member 40 is pulled out from the second adjustment shaft 32.

[0046] In this embodiment, when the equipment needs maintenance, the gear adjustment member is inserted into the second safety lock, rotated to stop the equipment and then pulled out, then the first safety lock is inserted, rotated to start the maintenance mode and pulled out, and each operator entering the equipment connects the third safety lock to the extension connector respectively, and removes the third safety lock from the extension connector when leaving the equipment. Through the setting of the extension connector, it can be judged that an operator has not left the equipment when the third safety lock exists, thereby avoiding the risk of mechanical injury, which is beneficial to improving the safety of the equipment; and, by setting two safety locks, the first safety lock and the second safety lock need to be operated separately when restarting the equipment. Even if the second safety lock is operated by mistake, the risk of mechanical injury can be avoided, which is beneficial to improving the safety of the equipment.

[0047] As an implementation, see Figure 1 and Figure 2 As shown, the shell 10 also includes a accommodating cavity 13 for placing the gear adjustment member 40 and a cover body 14 covering the opening of the accommodating cavity 13. The first fixing portion 12 is arranged on the cover body 14. The gear adjustment member 40 can be placed in the accommodating cavity 13 after being inserted into the first safety lock 20 and turned to start the maintenance mode and pulled out, and then the cover body 14 is covered at the opening of the accommodating cavity 13.

[0048] In some embodiments, a transparent window 15 may be provided on the cover body 14 , and the first fixing portion 12 may be located below the transparent window 15 . An operator may observe through the transparent window 15 whether a gear adjustment member 40 is placed in the accommodating cavity 13 .

[0049] As an implementation, please continue to see Figure 2 As shown, the first safety lock 20 further includes a first contact portion 23, a first electrode terminal 241 and a second electrode terminal 242. The first contact portion 23 is disposed on one end of the first adjustment shaft 22 away from the first opening 11. The first electrode terminal 241 and the second electrode terminal 242 are respectively disposed on the first lock body 21. The first contact portion 23 rotates with the first adjustment shaft 22. The first electrode terminal 241 and the second electrode terminal 242 are spaced apart on the rotation track of the first contact portion 23. When the first contact portion 23 rotates to the first gear position, the first contact portion 23 abuts against the first electrode terminal 241. The first gear position may correspond to the first rotation position described above. When the first contact portion 23 rotates to the second gear position, the first contact portion 23 abuts against the second electrode terminal 242. The second gear position may correspond to the second rotation position described above. Exemplarily, when the first safety lock 20 is in the first gear position, the first contact portion 23 abuts against the first electrode terminal 241, and the first electrode terminal 241 is triggered to output a first contact signal to the control end of the device, and the control end of the device can output a control signal in response to the first contact signal; when the first safety lock 20 is in the second gear position, the first contact portion 23 abuts against the second electrode terminal 242, and the second electrode terminal 242 is triggered to output a second contact signal to the control end of the device, and the control end of the device can output a control signal in response to the second contact signal.

[0050] In some embodiments, the second safety lock 30 may adopt a structure similar to the first safety lock 20. Figure 3As shown, the second safety lock 30 further includes a second contact portion 33, a third electrode terminal 341 and a fourth electrode terminal 342. The second contact portion 33 is disposed on the end of the second adjustment shaft 32 opposite to the insertion end of the gear position adjustment member 40. The third electrode terminal 341 and the fourth electrode terminal 342 are respectively disposed on the second lock body 31. The second contact portion 33 rotates with the second adjustment shaft 32. The third electrode terminal 341 and the fourth electrode terminal 342 are arranged at intervals on the rotation track of the second contact portion 33. When the second contact portion 33 rotates to the third gear position, the second contact portion 33 abuts against the third electrode terminal 341, and the third gear position may correspond to the third rotation position mentioned above; when the second contact portion 33 rotates to the fourth gear position, the second contact portion 33 abuts against the fourth electrode terminal 342, and the fourth gear position may correspond to the fourth rotation position mentioned above. Exemplarily, when the second safety lock 30 is in the third position, the second contact portion 33 abuts against the third electrode terminal 341, and the third electrode terminal 341 is triggered to output a third contact signal to the control end of the device, and the control end of the device can output a control signal in response to the third contact signal; when the second safety lock 30 is in the fourth position, the second contact portion 33 abuts against the fourth electrode terminal 342, and the fourth electrode terminal 342 is triggered to output a fourth contact signal to the control end of the device, and the control end of the device can output a control signal in response to the fourth contact signal.

[0051] As an implementation mode, the safety lock device of this embodiment further includes a controller (not shown), which is electrically connected to the first electrode terminal 241, the second electrode terminal 242, the third electrode terminal 341 and the fourth electrode terminal 342, respectively, and is used to output a first control signal corresponding to the first gear, a second control signal corresponding to the second gear, a third control signal corresponding to the third gear, or a fourth control signal corresponding to the fourth gear. Exemplarily, when the first safety lock 20 is in the first gear, the first contact portion 23 abuts against the first electrode terminal 241, and the first electrode terminal 241 is triggered to output a first contact signal to the controller, and the controller can output a first control signal in response to the first contact signal; when the first safety lock 20 is in the second gear, the first contact portion 23 abuts against the second electrode terminal 242, and the second electrode terminal 242 is triggered to output a second contact signal to the controller, and the controller can output a second control signal in response to the second contact signal. When the second safety lock 30 is in the third gear position, the second contact portion 33 abuts against the third electrode terminal 341, and the third electrode terminal 341 is triggered to output a third contact signal to the controller, and the controller can output a third control signal in response to the third contact signal; when the second safety lock 30 is in the fourth gear position, the second contact portion 33 abuts against the fourth electrode terminal 342, and the fourth electrode terminal 342 is triggered to output a fourth contact signal to the controller, and the controller can output a fourth control signal in response to the fourth contact signal.

[0052] As an implementation, see Figure 4 As shown, the extended connector 50 includes a connecting portion 51 detachably connected to the first fixing portion 12 and a plurality of second fixing portions 52 .

[0053] In some embodiments, the second fixing portion 52 is a connecting through hole opened on the extended connecting member 50 .

[0054] In some embodiments, see Figure 5 As shown, the safety lock device of this embodiment also includes at least one third safety lock 60, and the third safety lock 60 is detachably connected to the second fixing portion 52. In this embodiment, the third safety lock 60 is a padlock, and a plurality of third safety locks 60 are provided, and different third safety locks 60 are adapted to different safety keys. Different operators hold different third safety locks 60. When entering the device, the operator hangs his or her third safety lock 60 on one of the second fixing portions 52 of the extension connector 50 and locks it; when leaving the device, the operator opens his or her third safety lock 60 with a safety key and then removes it from the second fixing portion 52 of the extension connector 50. In this embodiment, since each operator can only open his or her own third safety lock 60 and cannot open the third safety lock 60 of other operators, the operational safety can be further improved.

[0055] As an implementation, see Figure 2 As shown, the gear adjustment member 40 includes a column portion 41 inserted into the first adjustment shaft 22 or the second adjustment shaft 32 and a handle portion 42 connected to the column portion 41 .

[0056] In some embodiments, see Figure 2 and Figure 3 As shown, the column portion 41 is provided with at least one strip groove 411, and the first adjusting shaft 22 is provided with a first plug-in protrusion 22a that cooperates with the strip groove 411. When the column portion 41 is inserted into the first adjusting shaft 22, the first plug-in protrusion 22a is plug-fitted with the strip groove 411; the second adjusting shaft 32 is provided with a second plug-in protrusion 32a that cooperates with the strip groove 411. When the column portion 41 is inserted into the second adjusting shaft 32, the second plug-in protrusion 32a is plug-fitted with the strip groove 411.

[0057] The above is only an implementation method of the present application. It should be pointed out that a person skilled in the art can make improvements without departing from the inventive concept of the present application, but these improvements are within the scope of protection of the present application.

Claims

1. A safety lock device, characterized in that: include: A shell, the shell comprising a first opening and at least one first fixing portion provided on an outer wall of the shell; a first safety lock disposed in the housing, the first safety lock comprising a first lock body having a first mounting cavity and a first adjustment shaft rotatably disposed in the first mounting cavity, the first mounting cavity being opposite to the first opening; a gear adjustment member penetrating through the first opening and inserted into the first adjustment shaft, and used for adjusting the circumferential rotation position of the first adjustment shaft; A second safety lock disposed outside the housing, the second safety lock comprising a second lock body having a second mounting cavity and a second adjustment shaft rotatably disposed in the second mounting cavity, the gear position adjustment member being inserted into the second adjustment shaft to adjust the circumferential rotation position of the second adjustment shaft; An extension connector detachably connected to the first fixing portion, wherein the extension connector is used for detachably connecting a third safety lock.

2. The safety lock device according to claim 1, characterized in that: The first safety lock also includes a first contact portion arranged at an end of the first adjustment shaft away from the first opening, and a first electrode terminal and a second electrode terminal respectively arranged on the first lock body, and the first electrode terminal and the second electrode terminal are arranged at intervals on the rotation trajectory of the first contact portion; when the first contact portion rotates to a first gear position, the first contact portion abuts against the first electrode terminal; when the first contact portion rotates to a second gear position, the first contact portion abuts against the second electrode terminal.

3. The safety lock device according to claim 2, characterized in that: The second safety lock also includes a second contact portion arranged at an end of the second adjustment shaft away from the gear adjustment member, and a third electrode terminal and a fourth electrode terminal respectively arranged on the second lock body, and the third electrode terminal and the fourth electrode terminal are arranged at intervals on the rotation trajectory of the second contact portion; when the second contact portion rotates to the third gear, the second contact portion abuts against the third electrode terminal; when the second contact portion rotates to the fourth gear, the second contact portion abuts against the fourth electrode terminal.

4. The safety lock device according to claim 2, characterized in that: The extended connector includes a connecting portion detachably connected to the first fixing portion and a plurality of second fixing portions.

5. The safety lock device according to claim 4, characterized in that: The second fixing portion is a connecting through hole formed on the extended connecting member.

6. The safety lock device according to claim 4, characterized in that: The third safety lock is a padlock, and the padlock is detachably connected to the extension connector.

7. The safety lock device according to claim 6, characterized in that: There are multiple third safety locks, and different third safety locks are adapted to different safety keys.

8. The safety lock device according to claim 1, characterized in that: The gear adjustment member includes a column portion inserted into the first adjustment shaft or the second adjustment shaft and a handle portion connected to the column portion.

9. The safety lock device according to claim 8, characterized in that: The column part is provided with at least one strip groove, and the first adjustment shaft or the second adjustment shaft is provided with an inserting protrusion matched with the strip groove.

10. The safety lock device according to claim 3, characterized in that: The safety lock device also includes a controller, which is electrically connected to the first electrode terminal, the second electrode terminal, the third electrode terminal and the fourth electrode terminal, respectively, and is used to output a first control signal corresponding to the first gear position, a second control signal corresponding to the second gear position, a third control signal corresponding to the third gear position, or a fourth control signal corresponding to the fourth gear position.

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