A safety interlock box

Abstract

The invention discloses a safety interlock box, comprising a rear shell component and an interlock component; the interlock component comprises a front panel and a rear panel, an upper and a lower slide are fixed between the front panel and the rear panel, and a first slider and a second slider are arranged between the upper and the lower slide; five key positions are distributed on the front panel; cylindrical toothed locks are installed on the first key position, the second key position, the third key position and the fourth key position, and a KABA lock is installed on the fifth key position; the crank sleeve of the first key position is connected to the first slider, the crank sleeve of the second key position is connected to the second slider; the crank sleeves of the third key position and the fourth key position are connected to the first slider and the second slider; the dial of the fifth key position is connected to the first slider and the second slider; a guide frame is provided on the rear panel, a fixing pin is penetrated on the guide frame, a spring is sleeved on the fixing pin, and the fixing pin passes through the positioning hole of the corresponding crank sleeve or the dial. The invention can realize the interlock function, and has the advantages of safety, reliability and low cost.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical interlocking devices, and in particular to a safety interlocking box. Background Art

[0002] The safety interlock box is a mechanical interlocking device in the EMU safety interlocking system and is also an indispensable part of the safety interlocking system. Its reliability directly determines the safety of maintenance personnel entering the high-voltage equipment box on the EMU. At present, each EMU has two high-voltage interlock key boxes. The key taken out of each high-voltage interlock key box can open the high-voltage equipment box. There is a certain risk when misoperating. Therefore, it is necessary to set certain conditions for the removal of the key of the high-voltage equipment box. Summary of the invention

[0003] In view of the problems existing in the above-mentioned prior art, the present invention provides a safety interlock box; the safety interlock box comprises a rear shell assembly and an interlock assembly installed in the rear shell assembly; the interlock assembly comprises a front panel and a rear panel, the front panel and the rear shell assembly are fixedly connected, an upper slideway and a lower slideway are fixed between the front panel and the rear panel, and a first slider and a second slider are arranged between the upper slideway and the lower slideway;

[0004] The front panel is provided with a first key position, a second key position, a third key position, a fourth key position and a fifth key position; wherein the first key position, the second key position, the third key position and the fourth key position are respectively provided with cylindrical toothed locks, and the cylindrical toothed locks sequentially pass through the front panel and the rear panel; each cylindrical toothed lock is respectively provided with a crank sleeve; the fifth key position is provided with a KABA lock, and the KABA lock is provided with a dial;

[0005] The crank sleeve in the first key position is connected to the first slider via a cylindrical pin, the crank sleeve in the second key position is connected to the second slider via a cylindrical pin; the crank sleeve in the third key position is connected to the first slider and the second slider via a cylindrical pin respectively; the crank sleeve in the fourth key position is connected to the first slider and the second slider via a cylindrical pin respectively; the dial in the fifth key position is connected to the first slider and the second slider via a cylindrical pin respectively;

[0006] A guide frame is provided on the rear panel corresponding to each key position, and a fixing pin is passed through the guide frame. A spring is sleeved on one end of the fixing pin connected to the guide frame, and the fixing pin passes through a positioning hole on a crank sleeve or a dial in the corresponding key position.

[0007] Furthermore, a fixed panel is provided at a position on the front panel corresponding to the fifth key position, and a lock head of the KABA lock is fixed on the fixed panel.

[0008] Furthermore, a protective cover is provided on the front panel at a position corresponding to each key position.

[0009] Furthermore, two L-shaped brackets are welded on the rear shell assembly.

[0010] The safety interlock box of the present invention forms an interlock mechanism by using a slideway, a slider and a key assembly. By turning the key to control the movement of the slider, the interlock function between multiple key positions is realized. Two high-voltage interlock keys must be inserted into the safety interlock box at the same time before the high-voltage equipment box key can be taken out, and the external power box key can be integrated when used, thereby further improving the safety of maintenance personnel. The safety hazard caused by improper operation of maintenance personnel is solved. It has the advantages of safety, reliability and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A front view of a safety interlock box provided by an embodiment of the present invention;

[0012] Figure 2 for Figure 1 AA section view;

[0013] Figure 3 A top view of a safety interlock box provided in an embodiment of the present invention.

[0014] Description of reference numerals:

[0015] 1: rear case assembly, 2: front panel, 3: first key position, 4: second key position,

[0016] 5: third key position, 6: fourth key position, 7: fifth key position, 8: crank sleeve,

[0017] 9: first slide block, 10: second slide block, 11: protective cover, 12: L-shaped bracket, 13: upper slideway,

[0018] 14: Downward slide, 15: Rear panel, 16: Guide frame, 17: Spring, 18: Alignment pin,

[0019] 19: dial, 20: cylindrical toothed lock, 21: fixed panel. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figures 1 to 3 The present embodiment provides a safety interlock box, which includes a rear shell assembly 1 and an interlock assembly installed in the rear shell assembly 1; the interlock assembly includes a front panel 2 and a rear panel 15, the front panel 2 and the rear shell assembly 1 are fixedly connected, an upper slide 13 and a lower slide 14 are fixed between the front panel 2 and the rear panel 15, and a first slider 9 and a second slider 10 are arranged between the upper slide 13 and the lower slide 14;

[0022] The front panel 2 is provided with a first key position 3, a second key position 4, a third key position 5, a fourth key position 6 and a fifth key position 7; wherein the first key position 3, the second key position 4, the third key position 5 and the fourth key position 6 are respectively provided with cylindrical toothed locks 20, which pass through the front panel 2 and the rear panel 15 in sequence; each cylindrical toothed lock 20 is respectively provided with a crank sleeve 8; the fifth key position 7 is provided with a KABA lock, which is provided with a dial 19;

[0023] The crank sleeve in the first key position 3 is connected to the first slider 9 through a cylindrical pin, and the crank sleeve in the second key position 4 is connected to the second slider 10 through a cylindrical pin; the crank sleeve in the third key position 5 is connected to the first slider 9 and the second slider 10 through a cylindrical pin respectively; the crank sleeve in the fourth key position 6 is connected to the first slider 9 and the second slider 10 through a cylindrical pin respectively; the dial in the fifth key position 7 is connected to the first slider 9 and the second slider 10 through a cylindrical pin respectively;

[0024] A guide frame 16 is provided on the rear panel 15 corresponding to each key position, and a fixing pin 18 is passed through the guide frame 16. A spring 17 is sleeved on one end of the fixing pin 18 connected to the guide frame 16, and the fixing pin 18 passes through a positioning hole on the crank sleeve or dial in the corresponding key position.

[0025] Furthermore, a fixed panel 21 is provided at a position corresponding to the fifth key position 7 on the front panel 2, and the lock head of the KABA lock is fixed on the fixed panel 21. A protective cover 11 is provided at a position corresponding to each key position on the front panel 2. Two L-shaped brackets 12 are welded on the rear housing assembly 1.

[0026] The functional logic implemented by the safety interlock box of this embodiment is: when the vehicle is running, there is no key in the first key position 3 and the second key position 4, and at this time the third key position 5, the fourth key position 6 and the fifth key position 7 are all locked (the keys therein cannot be turned or taken out).

[0027] During vehicle maintenance, in order to take out the keys in the third key position 5, the fourth key position 6 and the fifth key position 7, you first need to insert the keys in the first key position 3 and the second key position 4 and turn them all in place (turn counterclockwise about 60°). At this time, the third key position 5, the fourth key position 6 and the fifth key position 7 are all unlocked and can be taken out after turning them in place. If you only insert the key in the first key position 3 or the second key position 4 and turn them in place (turn counterclockwise about 60°), the keys in the third key position 5, the fourth key position 6 and the fifth key position 7 cannot be turned or taken out.

[0028] When any (1 to 3) keys are taken out from the third key position 5, the fourth key position 6 and the fifth key position 7, the keys in the first key position 3 and the second key position 4 are locked and cannot be rotated or taken out. To take out the keys in the first key position 3 and the second key position 4: only when all the keys in the third key position 5, the fourth key position 6 and the fifth key position 7 are inserted and turned to the vehicle running state, can the keys in the first key position 3 and the second key position 4 be taken out; if any one of the keys in the third key position 5, the fourth key position 6 and the fifth key position 7 is missing, the keys in the first key position 3 and the second key position 4 are locked and cannot be rotated or taken out.

[0029] Its working principle is: when the vehicle is running, there is no key in the first key position 3 and the second key position 4. At this time, the first slider 9 is locked by the corresponding fixing pin of the first key position 3, and the second slider 10 is locked by the corresponding fixing pin of the second key position 4; therefore, the keys in the third key position 5, the fourth key position 6 and the fifth key position 7 cannot be rotated due to the obstruction of the first slider 9 and the second slider 10.

[0030] When the key is inserted into the first key position 3 and rotated into place, the corresponding fixing pin of the first key position 3 is pushed out of the first slider 9, and the first slider 9 can translate in the upper slide 13 and the lower slide 14; similarly, when the key is inserted into the second key position 4 and rotated into place, the corresponding fixing pin of the second key position 4 is pushed out of the second slider 10, and the second slider 10 can translate in the upper slide 13 and the lower slide 14; only when the key is inserted into the first key position 3 and the second key position 4 at the same time and rotated into place, the keys in the third key position 5, the fourth key position 6 and the fifth key position 7 can be unlocked and taken out.

[0031] When any key in the third key position 5, the fourth key position 6 and the fifth key position 7 is taken out, the locating pin corresponding to the key position of the taken out key is inserted into the locating hole of the crank sleeve in the key position; the first slider 9 and the second slider 10 are locked; therefore, the keys in the first key position 3 and the second key position 4 are locked and cannot rotate; thereby realizing the interlocking function between multiple key positions.

[0032] The safety interlock box of this embodiment forms an interlock mechanism by using a slide, a slider and a key assembly. By turning the key to control the movement of the slider, the interlock function between multiple key positions is realized. Two high-voltage interlock keys must be inserted into the safety interlock box at the same time before the high-voltage equipment box key can be taken out, and the external power box key can be integrated when used, thereby further improving the safety of maintenance personnel. The safety hazards caused by improper operation of maintenance personnel are solved. It has the advantages of safety, reliability and low cost.

[0033] It should be noted that, in the embodiments of the present invention, the appearance of "first" and "second" is only for the purpose of distinguishing technical terms and for the convenience of description, and should not be understood as a limitation on the embodiments of the present invention. The terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "include one..." do not exclude the presence of other identical elements in the process, method, article or terminal device including the elements.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A safety interlock box, characterized in that: The safety interlock box comprises a rear housing assembly and an interlock assembly installed in the rear housing assembly; The interlocking assembly comprises a front panel and a rear panel, the front panel and the rear housing assembly are fixedly connected, an upper slideway and a lower slideway are fixed between the front panel and the rear panel, and a first slider and a second slider are arranged between the upper slideway and the lower slideway; The front panel is provided with a first key position, a second key position, a third key position, a fourth key position and a fifth key position; wherein the first key position, the second key position, the third key position and the fourth key position are respectively provided with cylindrical toothed locks, and the cylindrical toothed locks sequentially pass through the front panel and the rear panel; each cylindrical toothed lock is respectively provided with a crank sleeve; the fifth key position is provided with a KABA lock, and the KABA lock is provided with a dial; The crank sleeve in the first key position is connected to the first slider via a cylindrical pin, the crank sleeve in the second key position is connected to the second slider via a cylindrical pin; the crank sleeve in the third key position is connected to the first slider and the second slider via a cylindrical pin respectively; the crank sleeve in the fourth key position is connected to the first slider and the second slider via a cylindrical pin respectively; the dial in the fifth key position is connected to the first slider and the second slider via a cylindrical pin respectively; A guide frame is provided on the rear panel corresponding to each key position, and a fixing pin is passed through the guide frame. A spring is sleeved on one end of the fixing pin connected to the guide frame, and the fixing pin passes through a positioning hole on a crank sleeve or a dial in the corresponding key position.

2. The safety interlock box according to claim 1, characterized in that: A fixed panel is arranged on the front panel at a position corresponding to the fifth key position, and the lock head of the KABA lock is fixed on the fixed panel.

3. The safety interlock box according to claim 1, characterized in that: A protective cover is respectively arranged on the front panel corresponding to each key position.

4. The safety interlock box according to claim 1, characterized in that: Two L-shaped brackets are welded on the rear shell assembly.

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