CN209872041U

CN209872041U - Safety lock

Info

Publication number: CN209872041U
Application number: CN201920698425.2U
Authority: CN
Inventors: 于春生
Original assignee: Cooper (tianjin) Science And Technology Ltd
Current assignee: Cooper new energy Co.,Ltd.
Priority date: 2019-05-15
Filing date: 2019-05-15
Publication date: 2019-12-31
Anticipated expiration: 2029-05-15

Abstract

The utility model relates to a safety lock. The shock absorption device comprises a top plate with a top line hole in the middle and a base with a bottom line hole in the middle, wherein four upright posts are arranged between the top plate and the base; a linkage assembly, a trigger wheel assembly and a pinch roller assembly are arranged between the panel and the back plate; the linkage assembly comprises a main shaft, a support arm, adapter plates, a shifting fork shaft and a shifting fork, and two half-moon holes which are opposite are formed in plate bodies of the four adapter plates; the clamping device also comprises a first clamping block and a second clamping block which are oppositely arranged; the spring-loaded type spring is characterized by also comprising a bottom transverse shaft, wherein a guide rod is arranged between the top transverse shaft and; the trigger wheel assembly comprises a trigger wheel shaft, a first pressing wheel is arranged in the middle of the trigger wheel shaft, and a trigger wheel is arranged at the outer end of the trigger wheel shaft; the pinch roller subassembly includes the wheel seat, installs the second pinch roller on the wheel seat. The utility model discloses compact structure, action response are quick, the operation is stable.

Description

Safety lock

Technical Field

The utility model belongs to the technical field of lift car equipment, especially, relate to a safety lock.

Background

The wind power generation system is characterized in that a lift facility is generally used in the field of wind power, a tower drum lift is a lift for a wind power tower drum, and the wind power tower drum plays a supporting role and also has an effect of absorbing the vibration of a unit in the operation process. In the installation and later maintenance processes, related personnel need to climb to the wind turbine generator at the top from the inside of the tower along the wall of the tower barrel, and then carry out conventional maintenance operation. Under the general condition, wind power tower cylinder's height is great, and the mode of traditional bare-handed climbing not only wastes time and energy, leads to the dangerous condition moreover easily, and bare-handed climbing also can't carry too much maintenance facility, leads to wind turbine generator system's maintenance inefficiency, and above-mentioned a great deal of problem has been solved well to tower section of thick bamboo lift. The tower barrel elevator is similar to an elevator, a driving machine and a steel cable are adopted to drive the car to move up and down, a guide mechanism is matched to guarantee the stability of the car during lifting, and a safety mechanism is matched to carry out emergency braking under dangerous conditions to guarantee safety.

The existing tower drum lifter still cannot meet the increasingly strict requirements on the aspect of safety, and along with the increasing expansion of the global wind power scale, the tower drum lifter increasingly plays a more important auxiliary role, so that people have increasingly strict requirements on the performances of safety, convenience in maintenance and the like. The safety lock is one of common parts of a tower barrel elevator (a lifting car), plays an important role in the operation safety of the tower barrel elevator, and the working characteristics of the conventional safety lock are difficult to ensure the actual requirements, so that the structure of the safety lock is required to be optimally designed.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the technical problem that exists among the known art and provide a compact structure, action response is quick, the operation is stable safe tool to lock, promotes the factor of safety of lift car operation.

The utility model discloses a solve the technical scheme that technical problem that exists among the well-known technique took and be: a safety lock comprises a top plate with a top line hole in the middle and a base with a bottom line hole in the middle, wherein four stand columns are arranged between the top plate and the base, a supporting plate is arranged between the middle upper parts of the stand columns, a front plate is arranged at the front part below the supporting plate, a back plate is arranged at the back part below the supporting plate, side plates are arranged between the left side and the right side of the front plate and the back plate, and a damping block is arranged between the top plate and the supporting plate; a linkage assembly, a trigger wheel assembly and a pinch roller assembly are arranged between the panel and the back plate; the linkage assembly comprises a main shaft, a support arm, an adapter plate, a shifting fork shaft and a shifting fork, the shifting fork is fixedly arranged on the shifting fork shaft, the inner end of the adapter plate is fixedly connected with the end part of the shifting fork shaft, the outer end of the adapter plate is hinged with the top of the support arm, a shaft hole is formed in the middle lower part of the support arm, the main shaft penetrates out of the shaft hole and is provided with a handle, and a hook is arranged at the lower end of the support arm; the plate body of the top front side rotating plate, the top rear side rotating plate, the bottom front side rotating plate and the bottom rear side rotating plate is provided with two half moon holes; the clamping device comprises a top front side rotating plate, a top rear side rotating plate, a bottom front side rotating plate, a bottom rear side rotating plate, a first clamping block, a second clamping block, a first half moon block, a second half moon block, a third half moon block, a fourth half moon block, a fifth half moon block, a sixth moon block, a fifth moon block, a sixth moon block, a fifth moon block, a sixth moon block, a seventh moon block, a sixth moon block, a fifth moon block, a sixth moon block; the spring-loaded type spring is characterized by also comprising a bottom transverse shaft, wherein a guide rod is arranged between the top transverse shaft and; the trigger wheel assembly comprises a trigger wheel shaft, a first pressing wheel is installed in the middle of the trigger wheel shaft, and a trigger wheel used for triggering a hook at the lower end of the support arm is arranged at the outer end of the trigger wheel shaft; the pinch roller assembly comprises a roller seat, and a second pinch roller transversely opposite to the first pinch roller is arranged on the roller seat.

The utility model has the advantages that: the utility model provides a compact safety lock of structural design compares with current safety lock, through set up the snubber block between roof and backup pad among this technical scheme, makes this safety lock possess certain shock-absorbing capacity after triggering, also exactly the car takes place the broken string accident this safety lock produces a buffering effect in the twinkling of an eye after the action, has reduced the impact that produces personnel in the car. Through setting up the pinch roller subassembly, realized the reliable centre gripping to car hoist cable, make the operation of triggering the wheel subassembly and have stable corresponding relation between the speed of car hoist cable. The supporting arm of the linkage assembly is triggered by the trigger wheel assembly, so that the technical effect that the linkage assembly is reliably triggered by the tiny action of the trigger wheel is achieved, and the action response is quick and accurate. Through setting up the linkage subassembly and constitute by main shaft, support arm, keysets, declutch shift shaft, shift fork and upper and lower two sets of centre gripping subassemblies, realized triggering the back and carry out the technological effect of reliable centre gripping to the car hoist cable, the centre gripping action is stable, can not take place the pine and take off, has directly promoted this safety lock and the holistic factor of safety of lift car. Through setting up the handle, can realize the quick reset operation to this safety lock utensil. The whole safety lock is convenient to install on the lifting car.

Preferably: the trigger wheel comprises a flat cylindrical turntable, four ratchets with trigger teeth on the outer circumference are arranged on the outer end face of the turntable through pin shafts, fixed rods are arranged on the outer end face of each ratchet, and a reset spring is arranged between the fixed rods at opposite positions.

Preferably: the pinch roller assembly further comprises two push rods fixed on the outer side of the pinch roller seat in an installing mode, an adjusting sleeve with a threaded outer wall and a sealed outer end is sleeved outside each push rod, a spring is arranged on each push rod, two thread adjusting holes are formed in each side plate, and the two adjusting sleeves are respectively located in the two thread adjusting holes.

Preferably: the contact switch is arranged on the bracket.

Preferably: the drawing assembly comprises a lantern ring fixedly connected with the support arm, a screw is respectively fixed on the upper portion and the lower portion of the edge of the plate body of the panel, an upper spring is arranged between the screw on the upper portion and the lantern ring, and a lower spring is arranged between the screw on the lower portion and the lantern ring.

Preferably: the side plates are fixedly connected with the face plate and the back plate by long bolts, the two sides of the tops of the face plate and the back plate are respectively provided with a clamping hook, and the edges of the two sides of the supporting plate are respectively hooked and fixed by the clamping hooks.

Preferably: the bottom of the base is provided with a plurality of mounting lug plates with mounting holes.

Preferably: still be equipped with the shell body between roof and base, be equipped with the first window that passes through that supplies the main shaft to wear out and just to the second window that triggers the wheel subassembly in the front of shell body, install transparent panel on the second window that passes through, still be equipped with the sign of the switch position of instruction handle in the front of shell body.

Preferably: the connecting terminal is electrically connected with the output end of the contact switch through a lead wire.

Drawings

Fig. 1 is a schematic view of the external structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention with the outer housing removed;

FIG. 3 is a schematic view of the internal structure of the present invention, with a portion of the inner housing removed;

FIG. 4 is a schematic view of the internal structure of the present invention with the inner housing removed;

FIG. 5 is a schematic view of the internal structure of the present invention with a portion of the inner housing removed;

fig. 6 is a schematic structural diagram of the internal core motion assembly of the present invention.

In the figure: 1. a top plate; 1-1, a top line hole; 2. an outer housing; 2-1, a nameplate; 2-2, a first transparent window; 2-3, a second transparent window; 2-4, a sign; 3. a wiring terminal; 4. a handle; 5. a base; 5-1, mounting an ear plate; 5-2, bottom line hole; 6. a nut; 7. a transparent panel; 8. a shock absorbing block; 9. a linkage assembly; 9-1, bottom cross axis; 9-2, a bottom front side rotating plate; 9-3, a bottom rear side rotating plate; 9-4, a top front side rotating plate; 9-5, top horizontal axis; 9-6, a top rear side rotating plate; 9-7, a first clamping block; 9-7-1, first half month block; 9-8, a second clamping block; 9-8-1, second half-month block; 9-9, a shifting fork; 9-10 parts of shifting fork shaft; 9-11, an adapter plate; 9-12, a support arm; 9-13, a main shaft; 9-14, a hook; 9-15, a rotating shaft; 10. a column; 11. a support plate; 12. a long bolt; 13. a back plate; 14. a panel; 15. a side plate; 16. a pinch roller assembly; 16-1, adjusting; 16-2, wheel seat; 16-3, a second pinch roller; 17. a contact switch; 18. a trigger wheel assembly; 18-1, ratchet; 18-2, a trigger wheel; 18-3, a first pinch roller; 19. a pulling assembly; 19-1, an upper spring; 19-2, a collar; 19-3, a lower spring; 20. a guide bar; 21. a long spring.

Detailed Description

In order to further understand the contents, features and effects of the present invention, the following embodiments are described in detail:

referring to fig. 1 to 3, the safety lock of the present invention includes a top plate 1 having a top line hole 1-1 at the middle portion and a base 5 having a bottom line hole 5-2 at the middle portion, four columns 10 are provided between the top plate and the base, a support plate 11 is provided between the middle and upper portions of each column 10, a face plate 14 is provided at the front portion below the support plate 11, a back plate 13 is provided at the back portion below the support plate 11, side plates 15 are provided between the left side and the right side of the face plate 14 and the back plate 13, and a damping block 8 is provided between the top plate 1 and the support plate 11.

In this embodiment, the side plate 15 is fixedly connected to the front plate 14 and the back plate 13 by using the long bolt 12, the hooks are disposed on both sides of the top of the front plate 14 and the top of the back plate 13, and the edges of both sides of the supporting plate 11 are respectively hooked and fixed by the hooks. During the equipment, the lower extreme of each stand 10 all with base 5 fixed connection (like welding, threaded connection etc.), the upper end of stand 10 (have the external screw thread) is worn out and is adopted nut 6 to lock fixedly by the hole of roof 1 four corners department.

In this embodiment, a plurality of mounting lugs 5-1 with mounting holes are provided at the bottom of the base 5, and the entire safety lock is fixedly connected to the top frame of the elevator car through each mounting lug 5-1.

The snubber block 8 provides certain shock attenuation effect, and when the hoist cable of lift car took place the fracture accident, this safety lock intervenes the response fast, will pass this safety lock's safety hoist cable and firmly grasp to stop the lift car brake in the position of initial accident position below certain distance. In the response process, the car stops by great speed to the brake, can produce a great acceleration, produces potential injury to the personnel in the car, therefore sets up the effect that this snubber block 8 just reaches the effect of buffering through the deformability of snubber block 8. Structurally, snubber block 8 is the cylinder, and the safety sling of lift car passes through its middle part, and snubber block 8 is fixed by roof 1 and 11 centre grippings of backup pad, the position does not change, and in order to facilitate installing snubber block 8, can be in the lower surface of roof 1, the recess of the upper end face of backup pad 11 setting and snubber block 8 and lower terminal surface adaptation, through making the upper and lower tip of snubber block 8 sink into corresponding recess, make its position stable.

Referring to fig. 3 to 5, it can be seen that: a linkage assembly 9, a trigger wheel assembly 18 and a pinch roller assembly 16 are mounted between the face plate 14 and the back plate 13. The safety sling of the lifting car penetrates through the top line hole 1-1, passes through the linkage assembly 9, passes through the space between the trigger wheel assembly 18 and the pinch roller assembly 16, and finally penetrates out of the bottom line hole 5-2. The triggering wheel assembly 18 takes the lifting speed of the lifting car (namely the relative speed between the safety lock and the car sling) as a triggering signal, when the lifting speed exceeds a certain value, the triggering wheel assembly 18 triggers the linkage assembly 9, the linkage assembly 9 acts to clamp the safety sling, and the pinch roller assembly 16 is used for pressing the safety sling on the triggering wheel assembly 18, so that the action of the triggering wheel assembly 18 and the lifting speed of the car are ensured to have an accurate corresponding relation.

Referring to fig. 6, it can be seen that: the linkage assembly 9 comprises main shafts 9-13, support arms 9-12, adapter plates 9-11, shifting fork shafts 9-10 and shifting forks 9-9, the shifting forks 9-9 are fixedly arranged on the shifting fork shafts 9-10, the inner ends of the adapter plates 9-11 are fixedly connected with the end parts of the shifting fork shafts 9-10, the outer ends of the adapter plates are hinged with the tops of the support arms 9-12, shaft holes are formed in the middle lower parts of the support arms 9-12, the main shafts 9-13 penetrate through the shaft holes and are provided with handles 4, hooks 9-14 are arranged at the lower ends of the support arms 9-12, and the hooks 9-14 are used for being matched with the trigger wheel assembly 18.

The device also comprises a top front side rotating plate 9-4 and a top rear side rotating plate 9-6 which are opposite, a top transverse shaft 9-5 is arranged between the left sides of the two, and a rotating shaft 9-15 is arranged between the right sides of the two; the plate body of the top front rotating plate 9-4, the top rear rotating plate 9-6, the bottom front rotating plate 9-2 and the bottom rear rotating plate 9-3 are respectively provided with two half moon holes. The shifting fork 9-9 is abutted against the top edges of the top front rotating plate 9-4 and the top rear rotating plate 9-6, and the shifting fork 9-9 is driven by the support arm 9-12 to move in a tilting mode, so that the top front rotating plate 9-4 and the top rear rotating plate 9-6 can be driven to move in a tilting mode.

The safety sling also comprises a first clamping block 9-7 and a second clamping block 9-8 which are oppositely arranged, and the inner side walls of the first clamping block and the second clamping block which are opposite are provided with wire grooves for accommodating the safety sling. The front and the back sides of the middle upper part and the middle lower part of the first clamping block 9-7 are respectively provided with a first half moon block 9-7-1, the front and the back sides of the middle upper part and the middle lower part of the second clamping block 9-8 are respectively provided with a second half moon block 9-8-1, the first half moon block 9-7-1 and the second half moon block 9-8-1 on the upper front side are positioned in two half moon holes of the top front side rotating plate 9-4, the first half moon block 9-7-1 and the second half moon block 9-8-1 on the upper back side are positioned in two half moon holes of the top back side rotating plate 9-6, the first half moon block 9-7-1 and the second half moon block 9-8-1 on the lower front side are positioned in two half moon holes of the bottom front side rotating plate 9-2, and the first half moon block 9-7-1 and the second half moon block 9-8-1 on the lower back side are positioned in two half moon holes of the lower back side rotating plate 9-7-1 Two half-moon holes of the bottom rear side rotating plate 9-3. As shown in the figure, the mode of operation of the assembly is: when the combination formed by the top front side rotating plate 9-4, the top rear side rotating plate 9-6, the top transverse shaft 9-5 and the rotating shaft 9-15/the combination formed by the bottom front side rotating plate 9-2, the bottom rear side rotating plate 9-3 and the rotating shaft 9-15 synchronously rotate clockwise, the distance between the first clamping block 9-7 and the second clamping block 9-8 is reduced, the clamping and fixing of the safety sling are realized, otherwise, the distance between the first clamping block 9-7 and the second clamping block 9-8 is increased, the safety sling is released, and the process corresponds to the reset operation.

The device also comprises a bottom transverse shaft 9-1, a guide rod 20 is arranged between the top transverse shaft 9-5 and the bottom transverse shaft 9-1, and a long spring 21 is arranged on the guide rod 20. As shown in the figure, the hole formed on the top transverse shaft 9-5 is a through hole which is radially penetrated, the guide rod 20 penetrates out of the through hole, and the long spring 21 is used for providing elastic force for the combination body formed by the top front side rotating plate 9-4, the top rear side rotating plate 9-6, the top transverse shaft 9-5 and the rotating shaft 9-15, and providing clockwise rotating elastic force for the combination body (corresponding to the process of clamping and fixing the safety sling by starting the lock).

The shaft ends of the bottom transverse shaft 9-1 and the top transverse shaft 9-5 are respectively positioned in shaft holes formed in the panel 14 and the back plate 13; the shaft ends of the upper and lower rotating shafts 9-15 are respectively positioned in shaft holes arranged on the panel 14 and the back plate 13; the rear shaft ends of the shifting fork shafts 9-10 and the main shafts 9-13 are positioned in shaft holes formed in the back plate 13, the middle front parts of the shifting fork shafts 9-10 and the main shafts 9-13 are positioned in shaft holes formed in the face plate 14, and bearings are arranged between the shifting fork shafts 9-10 and the face plate 14 and the back plate 13 and between the main shafts 9-13 and the face plate 14 and the back plate 13 in order to reduce the rotation resistance.

In the embodiment, the drawing assembly 19 also comprises a drawing assembly 19, wherein the drawing assembly 19 comprises a lantern ring 19-2 fixedly connected with the support arm 9-12, a screw is respectively fixed on the upper part and the lower part of the edge of the plate body of the panel 14, an upper spring 19-1 is arranged between the screw on the upper part and the lantern ring 19-2, and a lower spring 19-3 is arranged between the screw on the lower part and the lantern ring 19-2. The pulling assembly 19 is used to provide an upward and downward pulling force on the linkage assembly 9 so that less force is required to operate the safety lock to reset and the operation is easier.

Referring to fig. 6, it can be seen that: the trigger wheel assembly 18 comprises a trigger wheel shaft, a first pressure wheel 18-3 is arranged in the middle of the trigger wheel shaft, and a trigger wheel 18-2 used for triggering a hook 9-14 at the lower end of the support arm 9-12 is arranged at the outer end of the trigger wheel shaft. The trigger wheel 18-2 comprises a flat cylindrical turntable, four ratchets 18-1 with trigger teeth on the outer circumference are arranged on the outer end face of the turntable through pin shafts, fixed rods are arranged on the outer end face of each ratchet 18, and a reset spring is arranged between the fixed rods at opposite positions. The working principle of the safety sling is that the safety sling is pressed on a first pressure wheel 18-3, the linear speed at the edge of the first pressure wheel 18-3 is equal to the moving speed of the safety sling, a return spring provides certain pulling force, when the rotating speed of a trigger wheel 18-2 reaches a certain value, the centrifugal force borne by a ratchet 18-1 overcomes the pulling force of the return spring, the ratchet 18-1 is opened outwards, and the ratchet 18-1 beats a hook 9-14 at the bottom of a support arm 9-12 in rotation to enable the support arm 9-12 to act.

Referring to fig. 6, it can be seen that: the pinch roller assembly 16 comprises a roller seat 16-2, a second pinch roller 16-3 transversely opposite to the first pinch roller 18-3 is arranged on the roller seat 16-2, and a safety sling is clamped between the first pinch roller 18-3 and the second pinch roller 16-3. The pinch roller assembly 16 further comprises two push rods fixedly arranged on the outer side of the pinch roller seat 16-2, an adjusting sleeve 16-1 with threads on the outer wall and a sealed outer end is sleeved outside each push rod, a spring is arranged on each push rod, two thread adjusting holes are formed in the side plate 15, and the two adjusting sleeves 16-1 are respectively located in the two thread adjusting holes. By rotating the two adjusting sleeves 16-1, the two adjusting sleeves 16-1 move inwards or outwards, when the adjusting sleeves move inwards, larger transverse pressure is generated on the wheel bases 16-2 and the second pressing wheels 16-3, the second pressing wheels 16-3 press the safety sling on the first pressing wheels 18-3 with larger force, and otherwise, when the adjusting sleeves move outwards, the safety sling is pressed on the first pressing wheels 18-3 with smaller force.

In this embodiment, in order to reflect the state of the safety lock, the safety lock further comprises a contact switch 17, a bracket is mounted on the inner side of the middle lower part of the support arms 9-12, and the contact switch 17 is mounted on the bracket. Therefore, when the safety lock is in an open state (the support arms 9-12 are inclined forwards), the contact switch 17 is tightly pressed against the inner wall of the safety lock, a generated trigger signal is sent to the controller, and the controller judges that the lock is in the open state at present; when the safety lock is in a locked state (the support arms 9-12 are outwards inclined), the contact switch 17 is released from contact with the inner wall of the safety lock, a generated trigger signal is sent to the controller, and the controller judges that the lock is currently in the locked state.

In this embodiment, an outer casing 2 is further disposed between the top plate 1 and the base 5, as shown in fig. 1, the outer casing 2 is formed by splicing four metal plates, namely, a front metal plate, a rear metal plate, a left metal plate, a right metal plate, a left metal plate, a right metal plate. Correspondingly, the assembly of the front plate 14, the back plate 13 and the left and right side plates 15 can be referred to as an inner housing.

A first through window 2-2 for the main shaft 9-13 to penetrate out and a second through window 2-3 opposite to the trigger wheel assembly 18 are arranged on the front surface of the outer shell 2, a transparent panel 7 is arranged on the second through window 2-3, and the condition of the inner trigger wheel assembly 18 can be observed through the transparent panel 7. The front surface of the outer shell 2 is also provided with an indication board 2-4 for indicating the switch position of the handle 4, and the outer shell 2 is also provided with a nameplate 2-1.

In this embodiment, still include binding post 3, binding post 3 is connected with contact switch 17's output electricity through leading the line, through setting up binding post 3, makes this safety lock can be connected with control system very conveniently.

The working process is as follows:

the safety lock is arranged on the top of a lifting car, and a special safety sling passes through the safety lock, namely sequentially passes through a top line hole 1-1, a damping block 8, a position between a first clamping block 9-7 and a second clamping block 9-8, a position between a first pressure wheel 18-3 and a second pressure wheel 16-3 and a bottom line hole 5-2 from top to bottom; adjusting the lateral position of the pinch roller assembly 16 to hold the safety sling against the trigger wheel assembly 18 with the appropriate force;

the safety lock is in an open state under the initial condition through the operation of the handle (see in the figure that the handle 4 is lifted upwards to an open position, at the moment, the support arm 9-12 rotates clockwise for a certain angle, the outer end of the connecting plate 9-11 is lifted for a certain distance, and the shifting fork 9-1 is shifted downwards), the top front rotating plate 9-4, the top rear rotating plate 9-6, the top transverse shaft 9-5 and the rotating shaft 9-15 form an assembly/the bottom front rotating plate 9-2, the bottom rear rotating plate 9-3 and the rotating shaft 9-15 form an assembly which synchronously rotates anticlockwise, so that the first clamping block 9-7 and the second clamping block 9-8 are far away from each other, the clamping and fixing effects are not generated on the safety sling in the middle part, and the linkage assembly 9 is stabilized at the current position (generating the self-locking effect, namely, the force of the connecting plate 9-11 to the support arm 9-12 along the length of the support arm The orientation of this position);

when the driving rope of the lifting cage is accidentally broken, the lifting cage falls and the speed is gradually increased; when the falling speed reaches a certain value, the ratchet 18-1 on the trigger wheel 18-2 of the trigger wheel assembly 18 overcomes the pulling force of the spring of the trigger wheel assembly to open under the action of centrifugal force, when the ratchet 18-1 is opened to a certain degree, a certain ratchet 18-1 is knocked on the hook 9-14 at the bottom of the support arm 9-12, under the action of knocking torque, the support arm 9-12 releases the self-locking state and rotates anticlockwise for a certain angle, the shifting fork 9-9 releases the combination formed by the top front side rotating plate 9-4, the top rear side rotating plate 9-6, the top transverse shaft 9-5 and the rotating shaft 9-15, the combination and the combination formed by the bottom front side rotating plate 9-2, the bottom rear side rotating plate 9-3 and the rotating shaft 9-15 rotate clockwise synchronously, under the elastic force of the long spring 21, the first clamping block 9-7 and the second clamping block 9-8 are close to each other, the safety sling is clamped in the middle to generate a braking effect, and the handle 4 moves to a locking position until the next resetting operation.

Claims

1. A safety lock is characterized in that: the shock absorption device comprises a top plate (1) with a top line hole (1-1) in the middle and a base (5) with a bottom line hole (5-2) in the middle, four upright posts (10) are arranged between the top plate and the base, a supporting plate (11) is arranged between the middle upper parts of the upright posts (10), a panel (14) is arranged at the front part below the supporting plate (11), a back plate (13) is arranged at the back part below the supporting plate (11), side plates (15) are arranged between the left side and the right side of the panel (14) and the back plate (13), and a shock absorption block (8) is arranged between the top plate (1) and the; a linkage component (9), a trigger wheel component (18) and a pinch roller component (16) are arranged between the panel (14) and the back plate (13);

the linkage assembly (9) comprises a main shaft (9-13), support arms (9-12), adapter plates (9-11), shifting fork shafts (9-10) and shifting forks (9-9), the shifting forks (9-9) are fixedly arranged on the shifting fork shafts (9-10), the inner ends of the adapter plates (9-11) are fixedly connected with the end parts of the shifting fork shafts (9-10), the outer ends of the adapter plates are hinged with the tops of the support arms (9-12), shaft holes are formed in the middle lower parts of the support arms (9-12), the main shaft (9-13) penetrates through the shaft holes and is provided with a handle (4), and hooks (9-14) are arranged at the lower ends of the support arms (9-12); the plate body is characterized by also comprising a top front side rotating plate (9-4) and a top rear side rotating plate (9-6) which are opposite, wherein a top transverse shaft (9-5) is arranged between the left sides of the top front side rotating plate and the top rear side rotating plate, a rotating shaft (9-15) is arranged between the right sides of the top front side rotating plate and the top rear side rotating plate, the bottom front side rotating plate (9-2) and the bottom rear side rotating plate (9-3) which are opposite are provided with a rotating shaft (9-15), and two half moon holes which are opposite are respectively arranged on the plate body of the top front side rotating plate (9-4), the top rear side rotating plate (9-6), the bottom front side rotating plate (9-2) and the bottom rear side rotating plate (9-; the clamping device also comprises a first clamping block (9-7) and a second clamping block (9-8) which are oppositely arranged, wherein the front side and the rear side of the middle upper part and the middle lower part of the first clamping block (9-7) are respectively provided with a first half moon block (9-7-1), the front side and the rear side of the middle upper part and the middle lower part of the second clamping block (9-8) are respectively provided with a second half moon block (9-8-1), the first half moon block (9-7-1) and the second half moon block (9-8-1) on the upper front side are respectively positioned in the two half moon holes of the top front side rotating plate (9-4), the first half moon block (9-7-1) and the second half moon block (9-8-1) on the upper rear side are respectively positioned in the two half moon holes of the top rear side rotating plate (9-6), and the first half moon block (9-7-1) and the second half moon block (9-8-1) on the lower front side are respectively positioned in the two half moon holes of The first half moon block (9-7-1) and the second half moon block (9-8-1) on the lower rear side are respectively positioned in the two half moon holes of the bottom rear side rotating plate (9-3); the device also comprises a bottom transverse shaft (9-1), a guide rod (20) is arranged between the top transverse shaft (9-5) and the bottom transverse shaft (9-1), and a long spring (21) is arranged on the guide rod (20);

the trigger wheel assembly (18) comprises a trigger wheel shaft, the middle part of the trigger wheel shaft is provided with a first pressure wheel (18-3), and the outer end of the trigger wheel shaft is provided with a trigger wheel (18-2) used for triggering a hook (9-14) at the lower end of the support arm (9-12);

the pinch roller assembly (16) comprises a roller seat (16-2), and a second pinch roller (16-3) transversely opposite to the first pinch roller (18-3) is arranged on the roller seat (16-2).

2. The security lock of claim 1, wherein: the trigger wheel (18-2) comprises a flat cylindrical turntable, four ratchets (18-1) with trigger teeth on the outer circumference are arranged on the outer end face of the turntable through pin shafts, fixed rods are arranged on the outer end face of each ratchet (18-1), and a reset spring is arranged between the fixed rods at opposite positions.

3. The security lock of claim 2, wherein: the pinch roller assembly (16) further comprises two push rods fixedly arranged on the outer side of the pinch roller seat (16-2), an adjusting sleeve (16-1) with threads on the outer wall and a sealed outer end is sleeved outside each push rod, a spring is arranged on each push rod, two thread adjusting holes are formed in the side plate (15), and the two adjusting sleeves (16-1) are respectively located in the two thread adjusting holes.

4. The security lock of claim 3, wherein: the device also comprises a contact switch (17), a bracket is arranged on the inner side of the middle lower part of the support arms (9-12), and the contact switch (17) is arranged on the bracket.

5. The security lock of claim 3, wherein: the drawing assembly (19) comprises a lantern ring (19-2) fixedly connected with the support arm (9-12), a screw is respectively fixed on the upper part and the lower part of the edge of the plate body of the panel (14), an upper spring (19-1) is arranged between the screw on the upper part and the lantern ring (19-2), and a lower spring (19-3) is arranged between the screw on the lower part and the lantern ring (19-2).

6. The security lock of claim 3, wherein: the side plate (15) is fixedly connected with the face plate (14) and the back plate (13) by adopting a long bolt (12), the two sides of the top parts of the face plate (14) and the back plate (13) are respectively provided with a clamping hook, and the edges of the two sides of the support plate (11) are respectively hooked and fixed by the clamping hooks.

7. The security lock of claim 3, wherein: the bottom of the base (5) is provided with a plurality of mounting ear plates (5-1) with mounting holes.

8. The security lock of claim 3, wherein: an outer shell (2) is further arranged between the top plate (1) and the base (5), a first through window (2-2) for the main shaft (9-13) to penetrate out and a second through window (2-3) opposite to the trigger wheel assembly (18) are arranged on the front face of the outer shell (2), a transparent panel (7) is installed on the second through window (2-3), and an indication board (2-4) for indicating the switch position of the handle (4) is further arranged on the front face of the outer shell (2).

9. The security lock of claim 4, wherein: the contact switch also comprises a wiring terminal (3), and the wiring terminal (3) is electrically connected with the output end of the contact switch (17) through a lead wire.