A heavy-duty centrifugal trigger safety lock

Abstract

The present invention belongs to the technical field of safety devices for high-altitude operations of construction machinery, and particularly relates to a heavy-duty centrifugal-triggered safety lock, comprising a panel, a rope inlet, a rope outlet and a wire rope channel are provided on the panel, a rope pressing mechanism located in the panel is provided on one side of the wire rope channel, a centrifugal trigger mechanism rotatably connected to the panel is provided on the other side, and an opening and closing lock mechanism is also provided on the panel, the centrifugal trigger mechanism is transmission-connected with the opening and closing lock mechanism in the triggered state, a guide shaft and a base located below the rope pressing mechanism are provided in the panel, a wedge-shaped groove surrounding the outside of the wire rope channel is provided on the base, the guide shaft is parallel to the wire rope channel and is fixedly installed on the top of the base, a rope locking mechanism is slidably passed through the guide shaft and is slidably connected to the base, the rope locking mechanism is used to clamp or release the wire rope and conflicts with the opening and closing lock mechanism. The present invention solves the technical problem of how to reduce the impact force received by the safety lock when it is triggered and make it evenly stressed.

Description

Technical Field

[0001] The invention belongs to the technical field of safety devices for high-altitude operations of construction machinery, and in particular relates to a heavy-duty centrifugal trigger type safety lock. Background Art

[0002] With the development of construction mechanization, more and more aerial work equipment has emerged. Among them, centrifugal safety locks are one of the core components to ensure the safety of aerial work equipment. At present, the rope locking mechanism of centrifugal safety locks is designed based on the principle of force-added quadrilaterals, and adopts a rope clamp, sleeve, connector, and spring linkage. It has the following defects: First, due to the small semicircular boss of the rope clamp, the centrifugal safety lock is unevenly stressed, resulting in it being only applicable to medium-load areas at most; second, due to the lack of buffer components, the centrifugal safety lock is subject to a large impact force when triggered, which is easy to cause damage to the centrifugal safety lock. Summary of the invention

[0003] In view of the shortcomings of the background technology, the present invention provides a centrifugal trigger safety lock, and the technical problem to be solved is how to effectively reduce the impact force received by the heavy centrifugal trigger safety lock when it is triggered, and make it evenly stressed.

[0004] To achieve the purpose of the present invention, the technical solution adopted is: a heavy-duty centrifugal trigger safety lock, comprising a panel, the panel being provided with a rope inlet, a rope outlet and a wire rope channel connected to the rope inlet and the rope outlet, one side of the wire rope channel being provided with a rope pressing mechanism located in the panel, and the other side being provided with a centrifugal trigger mechanism corresponding to the rope pressing mechanism, the centrifugal trigger mechanism being rotatably connected to the panel, the panel being further provided with an opening and closing lock mechanism, the centrifugal trigger mechanism being transmission connected to the opening and closing lock mechanism in the triggered state, the panel being provided with a guide shaft and a base located below the rope pressing mechanism, the base being provided with a wedge-shaped groove surrounding the outside of the wire rope channel, the guide shaft being parallel to the wire rope channel and fixedly mounted on the top of the base, a rope locking mechanism being slidably penetrated by the guide shaft and being slidably connected to the base, the rope locking mechanism being used to clamp or release the wire rope and conflict with the opening and closing lock mechanism.

[0005] Further,

[0006] The rope locking mechanism includes a sliding plate, which is slidably sleeved on the guide shaft and slidably connected to the base. A pair of wedges are symmetrically located on both sides of the wire rope channel on the sliding plate. The two wedges have their faces away from each other respectively fitted with the corresponding inclined surfaces of the wedge grooves and slidably connected to the wedge grooves. The bottom of the sliding plate is connected to a bracket located below the base, and the top of the bracket extends out of the panel. The bracket is provided with a plurality of rectangular holes, and the rectangular holes are provided with square pins and buffer blocks bonded to the square pins in sequence. The square pins are away from the base and movably connected to the panel, and the bottom of the bracket extends out of the panel. Since this type of rope locking mechanism is more stable than conventional rope locking mechanisms, has a balanced force, and significantly reduces stress concentration, it is more suitable for use on heavy equipment. It is expected that the centrifugal trigger safety lock can bear a weight in the range of (1000-2000kg), while the centrifugal trigger safety lock in the prior art can only reach a weight of (1000kg) at most.

[0007] The opposite surfaces of the two wedge blocks are respectively provided with arc grooves.

[0008] The unlocking and closing mechanism includes an unlocking shaft, a top block, a sliding sleeve, a lever and a rope lock spring. The rope lock spring is sleeved on the guide shaft, and its two ends are respectively in contact with the sliding plate and the base. The unlocking shaft extends vertically into the panel through the sliding sleeve. The lever is provided on one end of the unlocking shaft located outside the panel, and the top block is sleeved on the other end. The top block is in contact with the sliding plate.

[0009] The panel is provided with a limit screw on the surface where the lever is located, and a matching cover shell is provided above, the cover shell is provided with a viewing window and an unlocking handle located on one side of the viewing window, and the unlocking handle is connected to the unlocking shaft.

[0010] The top block is a cam which is larger at the top and smaller at the bottom.

[0011] The centrifugal trigger mechanism includes a rotating bracket, which rotates and extends into the panel. A speed measuring wheel is sleeved on one end of the rotating bracket located in the panel, and a pair of symmetrically arranged swing blocks are hinged on the other end, and an adjustment spring is connected between the free ends of the two swing blocks.

[0012] A V-shaped groove is provided on the outer peripheral surface of the speed measuring wheel.

[0013] The rope pressing mechanism comprises a clamping plate, one end of which is hinged on the panel, and the other end of which is rotatably provided with a rope pressing wheel, and a compression spring is abutted between the middle part of the clamping plate and the side wall of the panel.

[0014] An arc groove is arranged on the outer peripheral surface of the rope pressing wheel.

[0015] The beneficial effects of the present invention are: by setting the part of the rope locking mechanism that clamps the wire rope as a pair of wedges symmetrically arranged on both sides of the wire rope channel, the technical effect of making the heavy centrifugal trigger type safety lock evenly stressed is achieved; and by adding a buffer pad in the rope locking mechanism, the force generated by the buffer pad is opposite to the impact force received by the heavy centrifugal trigger type safety lock when it is triggered, thereby achieving the technical effect of effectively reducing the impact force received by the heavy centrifugal trigger type safety lock when it is triggered, and protecting the safety lock itself, the equipment itself, and the wire rope. Compared with the prior art, it has a simple structure, less stress concentration, a long service life, and is more suitable for heavy-load fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a cross-sectional view of a housing of the present invention in one embodiment;

[0017] Figure 2 is a cross-sectional view taken along the AA section of the present invention in one embodiment;

[0018] Figure 3 A front view of the present invention in one embodiment;

[0019] Figure 4 This is a schematic diagram of an unlocking state of the present invention in one embodiment;

[0020] Figure 5 is a schematic diagram of a locked state of the present invention in one embodiment;

[0021] Explanation of the accompanying drawings: 1—rope inlet, 2—throw block, 3—speed regulating spring, 4—adjusting cap, 5—mounting pin, 6—shift lever, 7—limit screw, 8—bracket, 9—rotating bracket, 10—bearing, 11—cover, 12—front panel, 13—rear panel, 14—speed measuring wheel, 15—guide shaft, 16—rope locking spring, 17—base, 18—window, 19—unlocking handle, 20—square pin, 21—buffer block, 22—guide pin, 23—wedge block, 24—sliding plate, 25—clamping plate, 26—rope pressing spring, 27—rope pressing wheel, 28—top block, 29—round pin, 30—unlocking shaft. Specific implementation plan

[0022] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0023] like Figures 1 to 5As shown: A heavy-duty centrifugal trigger safety lock includes a panel formed by connecting a front panel 12 and a rear panel 13, a rope inlet 1 is arranged on the top of the panel, a rope outlet opposite to the rope inlet 1 and a wire rope channel connected to the rope inlet 1 and the rope outlet is arranged on the bottom, and a speed measuring roller 14, a rope pressing wheel 27, a clamping plate 25, a rope pressing spring 26, a top block 28, a guide shaft 15, a base 17, a sliding plate 24, two wedges 23 and a bracket 8 are arranged inside; the middle part of the clamping plate 25 is connected to the inner wall of the panel through the rope pressing spring 26, and one end is rotatably connected to the inner wall of the panel through a pin, and the other end is a free end and is rotatably connected to the rope pressing wheel 27, which can rotate around the pin hole of the clamping plate 25, and the outer circumference of the rope pressing wheel 27 is opened There is an arc groove, and the rope pressing wheel 27 and the speed measuring wheel 14 are correspondingly located on both sides of the wire rope channel. The rope pressing wheel 27 is pressed toward the speed measuring wheel 14 under the action of the rope pressing spring 26; a V-shaped groove is opened on the outer peripheral surface of the speed measuring wheel 14, and it is fixed on one end of the rotating bracket 9 extending into the panel, and the rotating bracket 9 is fixed to the front panel 12 and the rear panel 13 through the bearing 10. The rotating bracket 9 is located on the outer part of the front panel and is hinged with a pair of symmetrically arranged swing blocks 2 through a fixing pin 5. A number of raised external teeth are provided on the outer sides of the two swing blocks 2, and the free ends are connected by a speed regulating spring 3; a cover shell 11 is provided on the front panel 12, and a window 18 is provided on the cover shell 11. The window 18 is opposite to the swing block 2, and the rotation of the swing block 2 can be observed here. The front panel 12 is also provided with a lever 6 at the same height as the outer teeth of the swing block 2, and the lever 6 is connected to the unlocking shaft 30, which is installed on the two panels through a sliding sleeve, and one end of which extends into the panel and is installed with a top block 28, and the other end extends out of the cover 11 and is installed with an unlocking handle 19. The front panel 12 is also provided with a limit screw 7, which is located in the area between the unlocking shaft 30 and the swing block 2, and limits the rotation range of the lever 6 under the action of the torsion spring. The top block 28 is a cam with a larger upper part and a smaller lower part, and the top block 28 conflicts with the upper part of the sliding plate 24; the base 17 is located below the speed measuring wheel 14 and is fixed between the inner side walls of the panel by four round pins 29. The base 17 is provided with a wedge-shaped groove surrounding the outside of the wire rope channel, and the bottom of the wedge-shaped groove is provided with a left-right symmetrical inclined long hole and a transverse long hole. The wedge-shaped groove is provided with two wedge blocks 23 corresponding to its two inclined surfaces, and the opposite surfaces of the two wedge blocks 23 are provided with an arc groove that is narrow at the top and wide at the bottom and symmetrical at the left and right, and is connected to the sliding plate 24; the sliding plate 24 is connected to the base 17 through the guide pin 22. The seat is slidably connected, and a through hole is provided on the top, which is passed through the guide shaft 15 connected to the top of the base 17. The guide shaft 15 is located below the speed measuring wheel 14, and a rope lock spring 16 is sleeved on the guide shaft 15, whose two ends are respectively abutted against the sliding plate 24 and the base 17. The bottom of the sliding plate 24 is connected to a bracket 8 with one end extending out of the panel, and the wire rope channel passes through the bracket 8. A rectangular hole is opened on the bracket 8, in which a square pin 20 and a buffer block 21 are installed. The buffer block 21 is installed on the upper part of the square pin 20, and the square pin 20 is slidably connected in the rectangular hole at the lower part of the two panels.

[0024] Working principle: During normal operation, the heavy centrifugal trigger safety lock is in the open state, the small arc at the bottom of the top block 28 is facing downward and fits the upper surface of the sliding plate 24, so that the sliding plate 24 is at the bottom of its range of motion, and the opposing surfaces of the two wedge blocks 23 are farthest apart, but smaller than the diameter of the wire rope, so that the wire rope can only pass through the arc groove inside it. After the wire rope enters the safety lock, it first passes through the speed measuring wheel 14 and the rope pressing wheel 27, and generates friction under the action of the rope pressing spring 26, driving the rotating bracket 9 and the swing block 2 to rotate, and the two swing blocks 2 are connected by the speed regulating spring 3. When the downward sliding speed of the safety lock reaches the set speed, the centrifugal force causes the swing block 2 to overcome the speed regulating spring 3 and open. The toothed edge on the swing block 2 touches the lever 6 to rotate, and the contact line between the top block 28 and the sliding plate 23 deviates from the vertical direction. Due to the upward force of the rope locking spring 16 on the top block 28, the top block 28 cannot provide sufficient downward pressure, so that the sliding plate 23 is moved upward by the pressure generated by the rope locking spring 16, and at the same time drives the wedge block 23 to move upward along the inclined surface of the wedge groove of the base 17. The opposite sides of the two wedge blocks 23 approach each other until the wire rope is tightly locked in the arc groove of the wedge block 23. In this process, the upward movement of the sliding plate 24 drives the bracket 8 to move upward, and the buffer block 21 in the rectangular hole of the bracket 8 is squeezed, resulting in a buffering effect, which effectively reduces the impact force. When unlocking is required, the unlocking handle 19 is turned, and the top block 28 pushes the sliding plate 24 downward, overcoming the pressure of the lock rope spring 16 and moving downward until the center of the small arc on the head of the top block 28 and the center of the unlocking shaft 30 are in the vertical direction. During this process, the wedge block 23 moves downward along the inclined surface of the wedge groove of the base 17, and the opposite surface of the wedge block 23 gradually moves away, loosening the wire rope; at the same time, the head of the lever 6 approaches the swing block 2 until it contacts the positioning screw 7 and cannot continue to rotate, and the lever 7 is in a state to be triggered.

[0025] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be limited by the claims and their equivalents.

Claims

1. A heavy-duty centrifugal trigger safety lock, characterized in that: The invention comprises a panel, wherein the panel is provided with a rope inlet, a rope outlet and a wire rope channel connected with the rope inlet and the rope outlet, a rope pressing mechanism located in the panel is provided on one side of the wire rope channel, and a centrifugal trigger mechanism corresponding to the rope pressing mechanism is provided on the other side, the centrifugal trigger mechanism is rotatably connected to the panel, an opening and closing locking mechanism is also provided on the panel, and the centrifugal trigger mechanism is transmission connected with the opening and closing locking mechanism in the triggered state, a guide shaft and a base located below the rope pressing mechanism are provided in the panel, a wedge-shaped groove surrounding the outside of the wire rope channel is provided on the base, the guide shaft is parallel to the wire rope channel and is fixedly mounted on the top of the base, a rope locking mechanism is slidably passed through the guide shaft and is slidably connected with the base, and the rope locking mechanism is used to clamp or release the wire rope. and conflicts with the opening and closing lock mechanism; the rope locking mechanism includes a sliding plate, the sliding plate is slidably sleeved on the guide shaft and is slidably connected to the base, the sliding plate is provided with a pair of wedge blocks symmetrically located on both sides of the wire rope channel, the away surfaces of the two wedge blocks are respectively fitted with the inclined surfaces of the corresponding wedge-shaped grooves, and are slidably connected to the wedge grooves; arc grooves are respectively provided on the opposite surfaces of the wedge blocks; the bottom of the sliding plate is connected to a bracket located below the base, and a plurality of rectangular holes are provided on the bracket, and square pins and buffer blocks bonded to the square pins are sequentially provided in the rectangular holes; when the sliding speed of the safety lock reaches the set speed, the centrifugal force causes the centrifugal trigger mechanism to trigger the opening and closing lock mechanism, and the opening and closing lock mechanism rotates so that the sliding plate can move upward, and the wedge block moves upward along the inclined surface of the wedge-shaped groove of the base, and the opposite sides of the two wedge blocks approach each other until the wire rope is locked in the arc groove of the wedge block.

2. A heavy-duty centrifugal trigger safety lock according to claim 1, characterized in that: The top end of the bracket extends out of the panel, the square pin is away from the base and movably connected to the panel, and the bottom end of the bracket extends out of the panel.

3. A heavy-duty centrifugal trigger safety lock according to claim 2, characterized in that: It includes an unlocking shaft, a top block, a sliding sleeve, a lever and a rope locking spring. The rope locking spring is sleeved on the guide shaft, and its two ends are respectively in contact with the sliding plate and the base. The unlocking shaft extends vertically into the panel through the sliding sleeve. The lever is provided on one end of the unlocking shaft outside the panel, and the top block is sleeved on the other end. The top block is in contact with the sliding plate.

4. A heavy-duty centrifugal trigger safety lock according to claim 3, characterized in that: The panel is provided with a limit screw on the surface where the lever is located, and a matching cover shell is provided above, the cover shell is provided with a viewing window and an unlocking handle located on one side of the viewing window, and the unlocking handle is connected to the unlocking shaft.

5. A heavy-duty centrifugal trigger safety lock according to claim 3, characterized in that: The top block is a cam which is larger at the top and smaller at the bottom.

6. A heavy-duty centrifugal trigger safety lock according to claim 1, characterized in that: The centrifugal trigger mechanism includes a rotating bracket, which rotates and extends into the panel. A speed measuring wheel is sleeved on one end of the rotating bracket located in the panel, and a pair of symmetrically arranged swing blocks are hinged on the other end, and an adjustment spring is connected between the free ends of the two swing blocks.

7. A heavy-duty centrifugal trigger safety lock according to claim 6, characterized in that: A V-shaped groove is provided on the outer peripheral surface of the speed measuring wheel.

8. A heavy-duty centrifugal trigger safety lock according to claim 1, characterized in that: The rope pressing mechanism comprises a clamping plate, one end of which is hinged on the panel, and the other end of which is rotatably provided with a rope pressing wheel, and a compression spring is abutted between the middle part of the clamping plate and the side wall of the panel.

9. A heavy-duty centrifugal trigger safety lock according to claim 8, characterized in that: An arc groove is arranged on the outer peripheral surface of the rope pressing wheel.

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