A self-locking device

Abstract

The invention discloses a self-locking device, comprising a main unit, a cam unit, two locking block assemblies and two locking retaining spring assemblies, wherein the cam unit comprises a cam, a cam pin shaft, a reset spring and a cam torsion spring; the cam pin shaft is key-connected with the cam and the main unit, and the cam is used to abut or separate from a guide rail; the two locking block assemblies can be close to or away from the main unit; when the cam torsion spring is in a state without preload, the reset spring is used to eject the cam pin shaft; when the cam torsion spring is applied with preload, the cam and the guide rail are in a separated state, and the cam angle is locked; the locking retaining spring assembly can push the locking block assembly away from the main unit in a horizontal direction, so as to release the position locking of the locking block assembly and the main unit; the locking block assembly can push the locking retaining spring assembly close to the relative position of the main unit in a horizontal direction. The invention solves the problem that the self-locking device has poor versatility, and the operator needs to prepare a variety of self-locking devices and select different self-locking devices according to different working environments.

Description

Technical Field

[0001] The invention belongs to the technical field of engineering construction tools, and in particular relates to a self-locking device. Background Art

[0002] The self-locking device is a self-locking device, which is often used for the sliding and locking of equipment on vertical tracks. Vertical guide rails are arranged and installed in the UHV transmission line engineering tower to provide safety protection for personnel going up and down the tower; cross arms are arranged in the horizontal direction of the engineering tower, and the cross arms can be made of steel strands or horizontal guide rails. There are many operating situations when operators are carrying out maintenance work on the UHV transmission line engineering tower, including climbing from the bottom of the tower through the self-locking device along the vertical guide rail to the cross arm position in the middle of the tower, and then turning to the cross arm to work; and moving along the conductor to another tower position to work, and then descending the tower from the vertical guide rail after the work is completed.

[0003] The currently commonly used self-locking devices cannot be applied to all the above-mentioned working conditions. Operators need to prepare a variety of self-locking devices and select different self-locking devices according to different working environments.

[0004] Therefore, developing a self-locking device that can cope with a variety of operating conditions, which can be easily disassembled from the vertical guide rail, and can also automatically reset the self-locking device when moving from the horizontal guide rail to the vertical guide rail, thereby improving the versatility of the self-locking device, is a technical problem that needs to be solved urgently. Summary of the invention

[0005] The purpose of the present invention is to provide a self-locking device to solve the problems that the self-locking devices in the prior art have poor versatility and cannot be applied to all the above-mentioned working conditions. The operators need to prepare a variety of self-locking devices and select different self-locking devices according to different working environments.

[0006] A self-locking device, which is used for sliding connection or locking on a guide rail, comprises a main body unit, a cam unit, a locking block unit and a locking clip spring unit, the main body unit is provided with a first through pin shaft hole and a through locking hole, the first through pin shaft hole is formed with a first keyway; the cam unit comprises a cam, a cam pin, a return spring and a cam torsion spring; the cam is provided with a second through pin shaft hole, and the second through pin shaft hole is formed with a second keyway; a key extending along the axial direction of the cam pin shaft is formed on the first end of the cam pin shaft; the cam is used to abut or separate from the guide rail; the cam pin shaft passes through the first through pin shaft hole and the second through pin shaft hole; the two ends of the cam torsion spring are respectively connected to the cam and the main body unit, and the cam torsion spring is used to apply a pre-tightening force between the cam and the main body unit; the locking block unit comprises two locking block assemblies slidably connected to both sides of the main body unit, the two The locking block assembly can be close to or away from the main body unit; the locking clip spring unit includes two locking clip spring assemblies slidably connected in the through locking hole, and the outer end of the locking clip spring assembly extends out of the through locking hole and then abuts against the locking block assembly; wherein, when the cam torsion spring is in a state without pre-tightening force, the return spring is used to pop out the first end of the cam pin shaft from the first through pin shaft hole and the second through pin shaft hole; when the cam torsion spring is applied with pre-tightening force, the cam and the guide rail are in a separated state, and the key is connected in the first keyway and the second keyway; the locking clip spring assembly can push the locking block assembly away from the main body unit in the horizontal direction to release the position locking of the locking block assembly and the main body unit; the locking block assembly can push the locking clip spring assembly close to the main body unit in the horizontal direction to lock the relative position of the locking block unit and the main body unit.

[0007] In some embodiments of the present application, the locking block unit also includes a locking spring starting assembly, which can push the two locking block assemblies, release the position lock between the two locking assemblies and the main unit, and push the two locking block assemblies to move in a direction away from the main unit.

[0008] In some embodiments of the present application, a connecting hole is provided on the main body unit, and the connecting hole is connected to the through locking hole; the locking clip spring assembly includes a locking clip spring sleeve and a locking clip spring sheet, and the locking clip spring sleeve is provided with a first guide groove along the length direction of the locking clip spring sleeve near the center of the main body unit; a locking portion is formed at the end of the locking clip spring sheet near the center of the main body unit, and a pushing portion is formed at the end away from the center of the main body unit, and the locking portion abuts against the inner wall of the connecting hole; the lower end of the locking clip spring starting assembly extends into the connecting hole and abuts against the two locking clip spring sheets; wherein, the locking clip starting assembly can push the two locking clip spring sheets to unlock the connecting hole, the locking portion can move along the first guide groove, and the pushing portion pushes the two locking clip spring sheets away from the main body unit.

[0009] In some embodiments of the present application, the locking spring starting assembly includes a starting button and a return spring, and an annular stop is formed in the middle of the starting button; the return spring is sleeved on the lower end of the starting button, the upper end of the return spring is against the annular stop, and the lower end of the return spring is against the lower end of the connecting hole.

[0010] In some embodiments of the present application, an annular retaining ring is formed on the inner wall of the connecting hole, the connecting hole is connected to the through locking hole through the annular retaining ring, and a second guide groove is opened on the annular retaining ring at a position corresponding to the first guide groove; the locking spring sheet passes through the first guide groove and the second guide groove in sequence and abuts against the inner wall of the connecting hole.

[0011] In some embodiments of the present application, the locking block assembly includes a locking block and a plurality of locking block springs, wherein the locking block springs are connected between the two sides of the main unit and the two locking blocks, and the locking block springs are used to push the locking block away from the main unit.

[0012] In some embodiments of the present application, a first annular stop is formed at the first end of the cam pin shaft; the return spring is sleeved outside the first end of the cam pin shaft, one end of the return spring is connected to the first annular stop, and the other end of the return spring is connected to the main body unit; the cam torsion spring is sleeved outside the second end of the cam pin shaft; one end of the cam torsion spring is connected to the main body unit, and the other end of the cam torsion spring is connected to the cam.

[0013] In some embodiments of the present application, a third guide groove is provided on the locking block along its length direction on a side close to the main unit, and a first stop is formed on the side of the third guide groove close to the main unit; first guide rails are provided on both sides of the main unit along its length direction, and a second stop is formed on the side of the first guide rail away from the main unit; the first guide rail is installed in the third guide groove; the locking block moves away from the main unit, and the first stop and the second stop abut against each other to limit the position of the locking block and the main unit.

[0014] In some embodiments of the present application, a sliding groove is provided on one side of the locking block close to the main unit along its length direction; and the sliding groove can move along the guide rail.

[0015] In some embodiments of the present application, a first guide wheel and a second guide wheel are rotatably connected to the inner side surface of the slide groove; a limiting portion is formed on the first guide wheel, and the limiting portion is used to contact the inner surface of the guide rail; a third guide wheel is rotatably connected to the main unit, and the third guide wheel is in rolling contact with the outer surface of the guide rail.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are:

[0017] 1. By setting two locking spring assemblies to push the two locking block assemblies away from the main unit, the self-locking device can be easily removed from the guide rail; by pushing the two locking block assemblies close to the main unit, the locking spring assembly can be locked with the main unit, so that the self-locking device can be easily installed on the guide rail. This saves time and effort when the operator switches from one vertical guide rail to another, or in other situations where the self-locking device needs to be removed and reinstalled from the guide rail, and the operation risk of the operator is reduced;

[0018] 2. By key-connecting the cam, the main unit and the cam pin shaft, and arranging a cam torsion spring between the cam and the main unit, and arranging a return spring between the cam pin shaft and the main unit, when the cam torsion spring has no preload force, the return spring pops out the cam pin shaft, releases the angle lock of the cam, and enables the operator to rotate to lock the self-locking device on the guide rail during the movement along the vertical guide rail; when the cam torsion spring has a preload force, the stable connection between the cam pin shaft, the cam and the main unit can be ensured, and the angle of the cam can be locked at a position where it does not contact the guide rail, so that the operator can move smoothly during the movement along the horizontal guide rail;

[0019] 3. Due to the above characteristics, the self-locking device can cope with a variety of operating conditions. It can be easily disassembled from the vertical guide rail, and can also automatically reset when moving from the horizontal guide rail to the vertical guide rail, thereby improving the versatility of the self-locking device.

[0020] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a self-locking device proposed by the present invention;

[0023] Figure 2 It is a top view of an embodiment of a self-locking device proposed by the present invention;

[0024] Figure 3 yes Figure 2 Sectional view at AA in the middle;

[0025] Figure 4 yes Figure 2 Sectional view at the middle BB;

[0026] Figure 5 yes Figure 2 Sectional view at CC;

[0027] Figure 6 It is a side view of an embodiment of a self-locking device proposed by the present invention;

[0028] Figure 7 It is a front view of an embodiment of a self-locking device proposed by the present invention;

[0029] Figure 8 It is a schematic diagram of the overall structure of a main unit of an embodiment of a self-locking device proposed by the present invention;

[0030] Fig. 9 It is a schematic diagram of the overall structure of a cam of an embodiment of a self-locking device proposed by the present invention;

[0031] Fig.10 It is a schematic diagram of the overall structure of a cam pin shaft of an embodiment of a self-locking device proposed by the present invention;

[0032] In the figure,

[0033] 100, main unit;

[0034] 110, through the locking hole;

[0035] 120, connection hole;

[0036] 121, annular retaining ring;

[0037] 1211, second guide groove;

[0038] 130, first rail;

[0039] 131, second stop;

[0040] 140, first connecting hole of locking block spring;

[0041] 150, third guide wheel;

[0042] 160, first through pin hole;

[0043] 161, first keyway;

[0044] 200, cam unit;

[0045] 210, cam;

[0046] 211, second through pin hole;

[0047] 212, second keyway;

[0048] 213, working hole;

[0049] 220, cam pin;

[0050] 221, key;

[0051] 222, second annular stop;

[0052] 223, first annular stop;

[0053] 230, return spring;

[0054] 240, cam torsion spring;

[0055] 300, locking block unit;

[0056] 310, locking block assembly;

[0057] 311, locking block;

[0058] 3111, third guide groove;

[0059] 3112, first stop;

[0060] 3113, chute;

[0061] 3114, first guide wheel;

[0062] 3115, second guide wheel;

[0063] 3116, limiter;

[0064] 312, locking block spring;

[0065] 400, locking spring unit;

[0066] 410, locking circlip assembly;

[0067] 411, locking circlip sleeve;

[0068] 4111, first guide groove;

[0069] 412, locking spring spring piece;

[0070] 420, locking spring starter assembly;

[0071] 4121, locking portion;

[0072] 4122, Promotion Department;

[0073] 421, start button;

[0074] 4211, annular stop;

[0075] 422, return spring. DETAILED DESCRIPTION

[0076] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0077] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0078] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0079] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0080] In the present invention, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0081] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0082] The self-locking device is a self-locking device, which is often used for the sliding and locking of equipment on vertical tracks. Vertical guide rails are arranged and installed in the UHV transmission line engineering tower to provide safety protection for personnel going up and down the tower; cross arms are arranged in the horizontal direction of the engineering tower, and the cross arms can be made of steel strands or horizontal guide rails. There are many operating situations when operators are carrying out maintenance work on the UHV transmission line engineering tower, including climbing from the bottom of the tower through the self-locking device along the vertical guide rail to the cross arm position in the middle of the tower, and then turning to the cross arm to work; and moving along the conductor to another tower position to work, and then descending the tower from the vertical guide rail after the work is completed.

[0083] The currently commonly used self-locking devices cannot be applied to all the above-mentioned working conditions. Operators need to prepare a variety of self-locking devices and select different self-locking devices according to different working environments. At the same time, they cannot respond quickly to temporary emergency tasks.

[0084] In this embodiment, a self-locking device is involved, which can cope with various operating conditions. It can be easily disassembled from the vertical guide rail, and can also automatically reset the self-locking device when it is moved from the horizontal guide rail to the vertical guide rail, thereby improving the versatility of the self-locking device.

[0085] In this embodiment, if Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the self-locking device includes a main body unit 100 , a cam unit 200 , a locking block unit 300 and a locking clip spring unit 400 .

[0086] In order to enable the self-locking device to be easily removed from the guide rail and easily reinstalled on another guide rail, the locking block unit 300 is designed to include two locking block assemblies 310 , and the two locking block assemblies 310 are slidably connected to both sides of the main unit 100 .

[0087] The locking clip unit 400 is designed to include two locking clip assemblies 410 . The two locking clip assemblies 410 can be respectively located at the locking block assemblies 310 on both sides away from the main unit 100 , thereby releasing the position lock between the two locking clip assemblies 410 and the main unit 100 .

[0088] Pushing the two locking block assemblies 310 respectively toward the main unit 100 can push the two locking clip spring assemblies 410 to move closer to the main unit 100 until the two locking clip spring assemblies 410 are locked in position with the main unit 100 .

[0089] In this embodiment, a through locking hole 110 is opened in the horizontal direction on the main unit 100 , and the through locking hole 110 is used to install two locking clip spring assemblies 410 . The two locking clip spring assemblies 410 are slidably connected in the through locking hole 110 .

[0090] In this embodiment, the locking hole unit 300 further includes a locking spring actuating assembly 420. The locking spring actuating assembly 420 pushes the two locking block assemblies 310 to release the position lock with the main unit 100 and makes the two locking hole assemblies 310 move away from the main unit 100.

[0091] In order to install the locking spring starting assembly 420 , a connecting hole 120 is opened on the main unit 100 .

[0092] The connecting hole 120 is communicated with the through locking hole 110 .

[0093] The locking clip spring actuating assembly 420 passes through the connecting hole 120 to push the two locking clip spring assemblies 410 that are slidably connected in the penetrating locking hole 110 .

[0094] In this embodiment, the locking clip assembly 410 includes a locking clip sleeve 411 and a locking clip spring piece 412 .

[0095] The two locking spring sleeves 411 are respectively installed in the through locking hole 110 from both ends of the through locking hole 110 .

[0096] One end of the locking spring sleeve 411 away from the main unit 100 is connected to the adjacent locking block assembly 310 via a bolt.

[0097] A first guide groove 4111 is formed on the locking circlip sleeve 411 and extends from a position close to the center of the main unit 100 along the length direction of the locking circlip sleeve 411 .

[0098] A locking portion 4121 is formed on the end of the locking clip spring piece 412 close to the center of the main unit 100 , and a pushing portion 4122 is formed on the end away from the center of the main unit 100 .

[0099] The two locking portions 4121 are located at the connection point between the connecting hole 120 and the through locking hole 110 .

[0100] An annular retaining ring 121 is formed on the inner wall of the connecting hole 120 , and the connecting hole 120 is connected with the through locking hole 110 after passing through the annular retaining ring 121 .

[0101] Second guide grooves 1211 are formed on the annular retaining ring 121 at positions corresponding to the two first guide grooves 4111 .

[0102] After the locking portion 4121 passes through the first guide groove 4111 and extends out of the locking spring sleeve 411 , and then passes through the second guide groove 1211 , the locking portion 4121 abuts against the inner wall of the connecting hole 120 , thereby locking the locking spring leaf 412 and the main unit 100 in position.

[0103] In this embodiment, the locking spring starting assembly 420 includes a starting button 421 and a return spring 422 .

[0104] An annular stopper 4211 is formed in the middle of the start button 421. The return spring 422 is sleeved outside the start button 421 from the lower end of the start button 421, and the upper end of the return spring 422 abuts against the annular stopper 4211. The lower end of the return spring 422 is on the annular stop ring 121.

[0105] The lower end of the start button 421 extends from the annular stopper 4211 into the through locking hole 110. After the operator presses the start button 421, the lower end of the start button 421 abuts against the two locking parts 4121 and pushes the locking parts 4121 and the main unit 100 to unlock.

[0106] After unlocking, the two locking spring pieces 412 move to both sides, and the pushers 4122 on both sides push the locking block assemblies 310 on both sides respectively. The two locking block assemblies 310 move away from the center of the main unit 100 relative to the main unit 100.

[0107] In order to enable the locking block assembly 310 to pop out relative to both sides of the main unit 100 , the locking block assembly 310 includes a locking block 311 and a plurality of locking block springs 312 .

[0108] The locking block spring 312 is installed between the locking block 311 and the main unit 100 . When the locking block 311 is away from the center of the main unit 100 relative to the main unit 100 , the locking block spring 312 pushes the locking block 311 to pop out.

[0109] Specifically, the plurality of locking block springs 312 are arranged at intervals along the length direction of the main unit 100 .

[0110] In this embodiment, in order to install the locking block spring 312 , first connecting holes 140 for the locking block spring are provided at intervals on both sides of the main unit 100 .

[0111] The locking block spring 312 is installed in the first locking block spring connection hole 140 , and two ends of the locking block spring 312 are connected to the first locking block spring connection hole 140 and the locking block 311 respectively.

[0112] In this embodiment, in order to achieve the sliding connection between the locking block 311 and the main unit 100, a third guide groove 3111 is provided along the length direction of the locking block 311 on the side close to the main unit 100, and a first stopper 3112 is provided on the side of the third guide groove 3111 close to the center of the main unit 100. First guide rails 130 are extended along the length direction of both sides of the main unit 100, and a second stopper 131 is extended to form on the side of the first guide rail 130 away from the main unit 100.

[0113] The first guide rail 130 is installed in the third guide groove 3111, and the second stopper 131 is located in the third guide groove 3111. The first stopper 3112 can prevent the second stopper 131 from sliding out of the third guide groove 3111, thereby playing the role of locking the relative position between the block 311 and the main unit 100.

[0114] Specifically, the first connecting hole 140 of the locking block spring is provided on the third guide groove 3111 .

[0115] The first connecting hole 140 of the locking block spring is formed on the first guide rail 130 .

[0116] In order to achieve the connection between the locking block 311 and the guide rail, a sliding groove 3113 is provided on a side of the locking block 311 close to the main unit 100 .

[0117] The sliding grooves 3113 provided on the two locking blocks 311 can move along the guide rails.

[0118] In order to reduce the friction between the two locking blocks 311 and the sliding groove 3113 , a first guide wheel 3114 and a second guide wheel 3115 are rotatably connected to the side of the sliding groove 3113 .

[0119] The first guide wheel 3114 and the second guide wheel 3115 can rotate along the guide rail.

[0120] A limiting portion 3116 is formed on the first guide wheel 3114 , and the limiting portion 3116 contacts the inner side surface of the guide rail.

[0121] A third guide wheel 150 is rotatably connected to a surface of the main unit 100 close to the guide rail, and the third guide wheel 150 is in rolling contact with the outer side surface of the guide rail.

[0122] In order to enable the operator to move smoothly along the horizontal guide rail, and after passing through the diverter and moving to the vertical guide rail, the self-locking device can realize the automatic recovery locking function.

[0123] like Figure 8 , Fig.10 As shown, a first through-pin shaft hole 160 is opened on the main body unit 100 , and a first key groove 161 is formed on the first through-pin shaft hole 160 .

[0124] The first key groove 161 is extended along the axial direction of the first through pin hole 160 .

[0125] The cam unit 200 includes a cam 210 , a cam pin 220 , a return spring 230 , and a cam torsion spring 240 .

[0126] like Fig. 9 As shown, a second through-pin hole 211 is formed on the cam 210 , and a second key groove 212 is formed on the second through-pin hole 211 .

[0127] The second keyway 212 is extended along the axial direction of the second through pin hole 211 .

[0128] A key 221 extending in the axial direction of the cam pin 220 is formed on the first end of the cam pin 220 .

[0129] The cam pin 220 passes through the first through pin hole 160 and the second through pin hole 211 .

[0130] The cam 210 rotates relative to the main unit 100 to achieve contact or separation between the cam 210 and the guide rail, thereby achieving locking and unlocking of the self-locking device and the rail.

[0131] Both ends of the cam torsion spring 240 are connected to the cam pin 220 and the main unit 200 respectively.

[0132] The cam torsion spring 240 may form a preload force between the cam pin 220 and the main body unit 100 .

[0133] The cam torsion spring 240 may also be connected between the cam pin 220 and the main unit 100 without preload.

[0134] A first annular stopper 223 is formed at a first end of the cam pin shaft 220 .

[0135] A second annular stopper 222 is formed at the second end of the cam pin shaft 220 .

[0136] The return spring 230 is sleeved outside the first end of the cam pin 220. One end of the return spring 230 is connected to the first annular stopper 223, and the other end of the return spring 230 is connected to the main unit 100.

[0137] The cam torsion spring 240 is sleeved on the second end of the cam pin 220. One end of the cam torsion spring 240 is connected to the cam 210, and the other end of the cam torsion spring 240 is connected to the main unit 100.

[0138] When the cam torsion spring 240 is in a state without pre-tightening force, the return spring 230 pushes the cam pin 220 to pop out from the first through pin hole 160 and the second through pin hole 211 .

[0139] When the cam torsion spring 240 is in a state of applying a preload, the key 221 is connected to the first key slot 161 and the second key slot 212. At this time, the cam 210 has no contact with the guide rail.

[0140] Due to the preload force of the cam torsion spring 240, the cam 210 can exert force on the main unit 200 through the cam pin 220. The key 221 abuts against the first key slot 161 and the second key slot 212 to prevent the cam pin 220 from being pushed out of the first through pin hole 160 and the second through pin hole 211 by the return spring 230.

[0141] When the operator is working along the horizontal guide rail, the cam pin 220 is pushed into the first through pin hole 160 and the second through pin hole 211, so that the key 221 is connected to the first key slot 161 and the second key slot 212. In this state, the cam 210 does not contact the guide rail, the cam torsion spring 240 is in a pre-tightened state, and the angle of the cam 210 relative to the main unit 100 is locked.

[0142] Since the operator is connected to the operation hole 213 provided on the cam 210 through a safety rope, when the operator moves along the horizontal guide rail, the operator applies force on the cam 210 through the safety rope. If the safety rope lifts the cam 210 relative to the main unit 100, the preload force of the cam torsion spring 240 is released, and the cam torsion spring 240 is in a state without preload force. At this time, the cam pin 220 pops out from the first through pin hole 160 and the second through pin hole 211, and the position locking of the cam 210 fails. At this time, if the operator continues to move in the direction of lifting the cam 210, the cam 210 is in an unlocked state relative to the guide rail, and the operator can move freely and smoothly. If at this time, the operator moves in the direction of pressing the cam 210 relative to the main unit 100, the cam 210 will be locked on the guide rail. Therefore, at this time, the cam pin 220 needs to be pushed back into the first through pin hole 160 and the second through pin hole 211, so that the key 221 is connected to the first key slot 161 and the second key slot 212, and the cam torsion spring 240 regains the preload force to lock the position of the cam 210. At this time, the cam 210 is separated from the guide rail. In this way, the cam 210 and the guide rail remain in a non-locked state while the operator continues to move in the direction of pressing the cam 210, ensuring the smooth movement of the operator. In this way, no matter which direction the operator moves along the horizontal guide rail, the operator can move smoothly by applying forces in different directions to the cam 210 through the safety rope.

[0143] When the operator turns from the horizontal guide rail to the vertical guide rail through the diverter, the operator is connected to the operation hole 213 of the cam 210 through the safety rope, and the self-locking device moves downward in the vertical direction relative to the operator due to the action of gravity, so that the safety rope lifts the cam 210 through the operation hole 213, so that the preload force of the cam torsion spring 240 disappears, and the reset spring 230 can push the first end of the cam pin 220 to pop out from the first through pin hole 160 and the second through pin hole 211. As a result, the key 221 pops out from the first key slot 161 and the second key slot 212, and the locking connection between the key 221 and the first key slot 161 and the second key slot 212 is released. As a result, the cam 210 can rotate relative to the main unit 100. In this state, when the self-locking device is connected to the vertical guide rail, the cam 210 restores the locking function due to the action of gravity. Therefore, when the operator turns from the horizontal guide rail to the vertical guide rail through the diverter, the locking function of the self-locking device is restored.

[0144] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A self-locking device, which is used for sliding connection or locking on a guide rail, characterized in that: include: A main body unit, on which a first through-pin shaft hole and a through-locking hole are formed, and a first keyway is formed on the first through-pin shaft hole; A cam unit, comprising a cam, a cam pin, a return spring and a cam torsion spring; the cam is provided with a second through-pin hole, the second through-pin hole is provided with a second keyway; a key extending in the axial direction of the cam pin is formed on the first end of the cam pin; the cam is used to abut or separate from the guide rail; the cam pin passes through the first through-pin hole and the second through-pin hole; the two ends of the cam torsion spring are respectively connected to the cam and the main unit, and the cam torsion spring is used to apply a preload between the cam and the main unit; A locking block unit, comprising two locking block assemblies slidably connected to both sides of the main body unit, wherein the two locking block assemblies can be close to or away from the main body unit; A locking clip spring unit, comprising two locking clip spring assemblies slidably connected in the through locking hole, wherein the outer ends of the locking clip spring assemblies extend out of the through locking hole and abut against the locking block assembly; Wherein, when the cam torsion spring is in a state without preload, the return spring is used to pop out the first end of the cam pin shaft from the first through pin shaft hole and the second through pin shaft hole; when the cam torsion spring is in a state with preload, the cam and the guide rail are in a separated state, and the key is connected in the first keyway and the second keyway; the locking retaining spring assembly can push the locking block assembly away from the main unit in the horizontal direction, so as to release the position lock between the locking block assembly and the main unit; the locking block assembly can push the locking retaining spring assembly close to the main unit in the horizontal direction, so as to lock the relative position between the locking block unit and the main unit.

2. The self-locking device according to claim 1, characterized in that: The locking block unit also includes a locking spring starting assembly, which can push the two locking block assemblies, release the position locking of the two locking block assemblies and the main unit, and push the two locking block assemblies to move in a direction away from the main unit.

3. The self-locking device according to claim 2, characterized in that: The main body unit is provided with a connecting hole, the connecting hole being in communication with the through locking hole; The locking circlip assembly comprises: A locking circlip sleeve, which has a first guide groove formed near the center of the main unit along the length direction of the locking circlip sleeve; A locking clip spring sheet, wherein a locking portion is formed at an end portion close to the center of the main unit, and a pushing portion is formed at an end portion away from the center of the main unit, wherein the locking portion abuts against an inner wall of the connecting hole; The lower end of the locking clip spring starting assembly extends into the connecting hole and abuts against the two locking clip spring sheets; Wherein, the locking clip starting assembly can push the two locking clip spring pieces to unlock the connecting hole, the locking portion can move along the first guide groove, and the pushing portion pushes the two locking clip spring pieces away from the main unit.

4. The self-locking device according to claim 3, characterized in that: The locking spring starting assembly comprises: A start button, wherein a ring-shaped stopper is formed in the middle thereof; A return spring is sleeved on the lower end of the start button, the upper end of the return spring abuts against the annular stopper, and the lower end of the return spring abuts against the lower end of the connecting hole.

5. The self-locking device according to claim 4, characterized in that: An annular retaining ring is formed on the inner wall of the connecting hole, the connecting hole passes through the annular retaining ring and is connected to the through locking hole, and a second guide groove is formed on the annular retaining ring at a position corresponding to the first guide groove; The locking clip spring piece passes through the first guide groove and the second guide groove in sequence and abuts against the inner wall of the connecting hole.

6. The self-locking device according to claim 1, characterized in that: The locking block assembly comprises a locking block and a plurality of locking block springs; The locking block spring is connected between two sides of the main unit and the two locking blocks, and the locking block spring is used to push the locking block away from the main unit.

7. The self-locking device according to claim 1, characterized in that: A first annular stop is formed at the first end of the cam pin shaft; the return spring is sleeved outside the first end of the cam pin shaft, one end of the return spring is connected to the first annular stop, and the other end of the return spring is connected to the main unit; the cam torsion spring is sleeved outside the second end of the cam pin shaft; one end of the cam torsion spring is connected to the main unit, and the other end of the cam torsion spring is connected to the cam.

8. The self-locking device according to claim 6, characterized in that: A third guide groove is formed on one side of the locking block close to the main unit along its length direction, and a first stopper is formed on one side of the third guide groove close to the main unit; Both sides of the main unit are provided with first guide rails along the length direction thereof, and a second stopper is formed on a side of the first guide rail away from the main unit; The first guide rail is installed in the third guide groove; The locking block moves away from the main unit, and the first stopper abuts against the second stopper to define the position of the locking block and the main unit.

9. The self-locking device according to claim 6, characterized in that: A sliding groove is provided on one side of the locking block close to the main unit along its length direction; The slide groove can move along the guide rail.

10. The self-locking device according to claim 9, characterized in that: The inner side surface of the slide groove is rotatably connected with a first guide wheel and a second guide wheel; a limiting portion is formed on the first guide wheel, and the limiting portion is used to contact the inner surface of the guide rail; The main body unit is rotatably connected with a third guide wheel, and the third guide wheel is in rolling contact with the outer surface of the guide rail.

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