Falling protector

Abstract

The invention provides an anti-falling device which comprises a back shell, a take-up wheel is arranged in the back shell, a locking frame, a rotating ring and a moving ring are sequentially arranged on one side of the take-up wheel, a pin hole, a pin rod and other structures are arranged between the locking frame and the rotating ring, when the rotating speed of the take-up wheel is too high, the pin rod extends into the pin hole, and the take-up wheel and the rotating ring rotate together; a spiral groove and a protrusion are arranged between the rotating ring and the movable ring, in the rotating process of the rotating ring, the movable ring axially moves and makes contact with the sealing cover to stop whole transmission, the anti-falling effect is achieved, and in the transmission process, the friction ring and the cohesion piece are arranged to interact, and friction between the friction ring and the cohesion piece reduces the rotating speed of the take-up wheel. Before stopping, the releasing speed of the steel cable is reduced, and the impulse borne by a user is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of fall arresters, and in particular to a fall arrester. Background Art

[0002] The fall arrester, also called the speed differential, is a protective product that can quickly brake and lock a falling object within a limited distance. It is suitable for cargo hoisting, protecting the life safety of ground operators and preventing damage to the hoisted workpiece.

[0003] When using an existing fall arrester, if the steel cable is released quickly, the fall arrest mechanism will be triggered quickly. At this time, the user will be subjected to a large impulse, and the safety belts and other protective gear on his body will be tightened, causing discomfort to the user. Secondly, after the fall arrester is triggered, the internal maintenance should also be carried out to improve the safety of use. Summary of the invention

[0004] In order to solve the above problems, the present invention discloses a fall arrester, comprising a back shell, a fixed shaft is fixedly connected to the inside of the back shell, a take-up wheel is rotatably connected to the fixed shaft, and a steel cable is gathered at the edge of the take-up wheel. A wire groove is arranged on the outside of the take-up wheel, and the steel cable is wound in the wire groove, and a groove is arranged on the inside of the take-up wheel.

[0005] A locking frame, a rotating ring and a moving ring are sequentially arranged on one side of the take-up wheel. The locking frame includes a supporting frame, and the supporting frame is fixedly connected to the take-up wheel. A plurality of supporting blocks are fixedly connected to the edge of the supporting frame. A pin rod is radially movable on the supporting block. The rotating ring includes a second ring body, and a pin hole is arranged inside the second ring body, and the pin hole and the pin rod cooperate. That is, the locking frame rotates with the take-up wheel, and when the take-up wheel rotates too fast, the pin rod is radially extended, so that the pin rod extends into the pin hole, that is, the rotating ring rotates with the take-up wheel.

[0006] The movable ring comprises a first ring body, the first ring body is sleeved on the side wall of the second ring body, the side wall of the second ring body is provided with a spiral groove, the interior of the first ring body is fixedly connected with a protrusion, and the protrusion is slidably fitted in the spiral groove. When the movable ring is restricted from rotating, through the cooperation between the protrusion and the spiral groove, when the rotating ring rotates, the movable ring moves axially.

[0007] The front of the back shell is fixedly connected with a cover, the back of the cover is fixedly connected with a plurality of plug rods, the side wall of the first ring body is provided with slots, and the plug rods are matched with the slots. When the plug rods are matched with the slots, the movement ring is restricted from rotating, and when the end of the movement ring contacts the cover, the rotation of the take-up wheel is restricted, that is, the anti-falling function is activated.

[0008] A friction ring is inserted and fixedly connected in the middle of the fixed shaft, and a plurality of embracing parts are arranged at equal angles on the outer side of the friction ring. One end of the embracing part is rotatably connected to the second ring body, and a U-shaped elastic part is arranged on the back of the embracing part, and the other side of the U-shaped elastic part contacts the inner wall of the second ring body. The U-shaped elastic part makes the embracing part close to the friction ring. During the rotation of the rotating ring, the friction between the friction ring and the embracing part reduces the rotation speed of the rotating ring, that is, the release speed of the steel cable. The arrangement of this structure ensures that when the user falls, it acts as a buffer, greatly reducing the impulse received by the user, thereby avoiding injuries caused by excessive impulse.

[0009] Preferably, a coil spring is sleeved and fixedly connected to the fixed shaft, and the other end of the coil spring is fixedly connected to the inner wall of the take-up wheel. The coil spring is wound in a groove inside the take-up wheel. After the steel cable is pulled out, the coil spring stores elastic potential energy, and when the steel cable is not under force, the steel cable is gathered into the take-up wheel.

[0010] Preferably, a spring is sleeved on the pin rod, one end of the spring abuts against the support block, and the other end abuts against a counterweight column preset at the end of the pin rod, and the spring keeps the pin rod moving toward the fixed axis. The use of the spring ensures the normal position of the pin rod under normal use, while the counterweight column improves the sensitivity of the pin rod in radial movement.

[0011] Preferably, a plurality of bolts are inserted through the edge of the cover, and the bolts are threadedly connected to the back shell, so that the cover is fixedly connected to the back shell through the bolts.

[0012] Preferably, a lifting lug is provided at the upper end of the back shell, and a through hole is provided on the lifting lug, through which a sling passes to suspend the fall arrester.

[0013] Preferably, the lower end of the back shell is provided with a perforation, and a wire loop is provided in the perforation, and the steel cable passes through the middle of the wire loop. The upper and lower inner walls of the wire loop are both arc-shaped, and the inner wall is smooth, which reduces the wear of the steel cable.

[0014] The first ring body is axially fixedly connected with an indicator rod, and the indicator rod penetrates the cover. After the device is triggered, the movable ring moves axially, and its indicator rod protrudes on the surface of the cover, indicating that the fall arrester has been triggered and needs to be repaired, thereby improving the safety of reuse.

[0015] The beneficial effects of the present invention are as follows: A take-up wheel, a locking frame, a rotating ring and a moving ring are provided, the locking frame is fixed on the take-up wheel, and a pin hole and a pin rod are provided between the locking frame and the rotating ring. When the speed of the take-up wheel is too fast, the pin rod extends into the interior of the pin hole. A spiral groove and a protrusion are provided between the rotating ring and the moving ring. During the rotation of the rotating ring, the moving ring moves axially and contacts the sealing cover to stop the entire transmission, thereby achieving an anti-fall effect. Furthermore, a friction ring and an engaging member are provided on the inner side of the rotating ring. During the rotation of the rotating ring, the rotation speed of the take-up wheel is reduced by the friction force between the friction ring and the engaging member, namely, the release speed of the steel cable is slowed down, namely, when the user falls, the steel cable will not stop releasing immediately, but will first reduce the release speed and then stop. In this way, the user is subjected to less impulse, which greatly improves the user's physical feeling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the present invention; Figure 2 It is an explosion schematic diagram of the present invention; Figure 3 It is a schematic diagram of the interior of the present invention from a frontal perspective; Figure 4 is a three-dimensional schematic diagram of the embracing member of the present invention; Figure 5 is a schematic diagram of the inner side of the cover of the present invention; Figure 6 is a three-dimensional schematic diagram of a moving ring of the present invention; Figure 7 It is a three-dimensional schematic diagram of the locking frame of the present invention; Figure 8 It is a three-dimensional schematic diagram of the rotating ring of the present invention.

[0017] List of reference numerals: 1. Cover; 2. Bolt; 3. Back shell; 4. Lifting ear; 5. Moving ring; 6. Embracing piece; 7. U-shaped elastic piece; 8. Friction ring; 9. Fixed shaft; 10. Take-up wheel; 11. Coil spring; 12. Locking frame; 13. Rotating ring; 14. Steel cable; 101, plug rod; 501, first ring body; 502, slot; 503, protrusion; 504, indicator rod; 1201, pin rod; 1202, support block; 1203, spring; 1204, support frame; 1301, second ring body; 1302, pin hole; 1303, spiral groove. DETAILED DESCRIPTION

[0018] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0019] like Figures 1 to 8 As shown, a fall arrester includes a back shell 3, which is a thin shell. Its structural outline is similar to the shape of the existing mainstream fall arresters. A fixed shaft 9 is fixedly connected to the inside of the back shell 3, and a take-up wheel 10 is rotatably connected to the fixed shaft 9. The edge of the take-up wheel 10 is gathered with a steel cable 14. When in use, one end of the steel cable 14 is tied to the user's safety belt.

[0020] A locking frame 12, a rotating ring 13 and a moving ring 5 are sequentially arranged on one side of the take-up wheel 10. The locking frame 12 includes a support frame 1204. The support frame 1204 is a plate-shaped member on which a plurality of fan-shaped through holes are arranged. The support frame 1204 is fixedly connected to the take-up wheel 10 and is fixedly connected to the take-up wheel 10 by threaded connection or welding. A bearing or a bearing shell is also arranged between the take-up wheel 10, the support frame 1204 and the fixed shaft 9. The edge of the support frame 1204 is fixedly connected with a plurality of support Block 1202, a pin rod 1201 is radially movably arranged on the support block 1202, that is, during the rotation of the take-up wheel 10, the pin rod 1201 is radially thrown out under the action of centrifugation, and the rotating ring 13 includes a second ring body 1301, and a pin hole 1302 is arranged inside the second ring body 1301, and the pin hole 1302 and the pin rod 1201 cooperate. If the rotation speed of the take-up wheel 10 is too fast, the pin rod 1201 moves radially and extends into the pin hole 1302, and the rotating ring 13 also rotates at this time.

[0021] Furthermore, in order to improve the hit rate of the pin rod 1201 extending into the pin hole 1302, the pin rod 1201 and the lower hole 1302 are arranged at equal angles, or a wedge block is set on one side of the pin hole 1302. Even if the pin rod 1201 does not extend into the pin hole 1302, the side wall of the end of the pin rod 1201 will press against one side of the wedge block, thereby pushing the rotating ring 13 to rotate.

[0022] The movable ring 5 includes a first ring body 501, which is sleeved on the side wall of the second ring body 1301. The side wall of the second ring body 1301 is provided with a spiral groove 1303, and the spiral groove 1303 is provided with three grooves. A protrusion 503 is fixedly connected to the inside of the first ring body 501, and the protrusion 503 is slidably fitted in the spiral groove 1303. That is, during the rotation of the rotating ring 13, the movable ring 5 is moved axially by the setting of the protrusion 503 and the spiral groove 1303.

[0023] The front of the back shell 3 is covered and fixedly connected with a cover 1, which seals the back shell 3. The back of the cover 1 is fixedly connected with a plurality of plug rods 101. The side wall of the first ring body 501 is provided with a slot 502. The plug rod 101 and the slot 502 cooperate with each other. When the plug rod 101 and the slot 502 are assembled, the movable ring 5 can only move axially. When the movable ring 5 is in contact with the cover 1, the rotating ring 13 and the take-up wheel 10 are restricted and stopped from rotating, thereby preventing the wire from falling.

[0024] The middle of the fixed shaft 9 is interspersed with a friction ring 8, the outer side of the friction ring 8 is a grinding wheel-like structure, and the inner side is a support ring. A number of embracing pieces 6 are arranged at equal angles on the outer side of the friction ring 8. There is friction between the friction ring 8 and the embracing piece 6. One end of the embracing piece 6 is rotatably connected to the second ring body 1301. A U-shaped elastic piece 7 is arranged on the back of the embracing piece 6. The other side of the U-shaped elastic piece 7 is in contact with the inner wall of the second ring body 1301. Under the action of the U-shaped elastic piece 7, the embracing piece 6 is closely attached to the friction ring 8. After the pin rod 1201 extends into the pin hole 1302, the rotating ring 13 rotates. At this time, the friction between the embracing piece 6 and the friction ring 8 reduces the rotation speed of the take-up wheel 10, thereby greatly reducing the impulse received by the user and reducing the damage to the user.

[0025] A coil spring 11 is sleeved and fixedly connected on the fixed shaft 9, and the other end of the coil spring 11 is fixedly connected to the inner wall of the take-up wheel 10. After the steel cable 14 is rotated and pulled out from the back shell 3, the coil spring 11 is deformed to store elastic potential energy. When the steel cable 14 is not subjected to external force, the coil spring 11 releases the elastic potential energy and rewinds the steel cable back into the back shell 3.

[0026] A spring 1203 is sleeved on the pin rod 1201, one end of the spring 1203 abuts against the support block 1202, and the other end abuts against a counterweight column preset at the end of the pin rod 1201. The spring 1203 keeps the pin rod 1201 moving toward the fixed axis 9, that is, the spring 1203 ensures the position of the pin rod 1201. At the same time, the use of the counterweight column improves the sensitivity of the radial throwing of the pin rod 1201 during the rotation process.

[0027] A plurality of bolts 2 are inserted through the edge of the cover 1 , and the bolts 2 are threadedly connected to the back shell 3 , so that the cover 1 is fixedly connected to the back shell 3 through the bolts 2 .

[0028] The upper end of the back shell 3 is provided with a lifting lug 4, and a through hole is provided on the lifting lug 4. A sling is passed through the through hole to hang the fall arrester.

[0029] The lower end of the back shell 3 is provided with a through hole, and a wire loop is provided in the through hole. The upper and lower inner walls of the guide loop are both arc surfaces to reduce the wear of the steel cable 14, and the steel cable 14 passes through the middle of the wire loop.

[0030] An indicator rod 504 is axially fixedly connected to the first ring body 501, and the indicator rod 504 is arranged through the cover 1. After the fall arrester is triggered, the indicator rod 504 protrudes from the end cover of the cover 1, indicating that the fall arrester has been used and needs to be opened for maintenance. At the same time, under the action of the clasping member 6 and the friction ring 8, the indicator rod 504 is not easy to be pressed back by human power.

[0031] Working principle: When in use, the fall arrester is suspended and one end of the steel cable 14 is tied to the user. If an accidental fall occurs, the rotation speed of the take-up wheel 110 is too fast, and the pin rod 1201 is thrown out and engaged in the pin hole 1302. At this time, the rotating ring 13 rotates, and the movable ring 5 engaged with the threaded groove 1303 and the protrusion 503 moves axially. During the process, the engaging part 6 also rotates, and the friction between the engaging part 6 and the friction ring 8 reduces the rotation speed of the take-up wheel 10. When the movable ring 5 contacts the cover 1, the take-up wheel 10 stops rotating, thereby achieving the anti-fall effect.

[0032] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above technical features.

Claims

1. A fall arrester, characterized in that: It comprises a back shell (3), the interior of the back shell (3) is fixedly connected to a fixed shaft (9), the fixed shaft (9) is rotatably connected to a take-up wheel (10), and the edge of the take-up wheel (10) is bounded by a steel cable (14); A locking frame (12), a rotating ring (13) and a movable ring (5) are sequentially arranged on one side of the take-up wheel (10); the locking frame (12) comprises a support frame (1204), and the support frame (1204) is fixedly connected to the take-up wheel (10); a plurality of support blocks (1202) are fixedly connected to the edge of the support frame (1204); a pin rod (1201) is radially movably arranged on the support block (1202); the rotating ring (13) comprises a second ring body (1301); a pin hole (1302) is arranged inside the second ring body (1301), and the pin hole (1302) and the pin rod (1201) cooperate; The movable ring (5) comprises a first ring body (501), the first ring body (501) being sleeved on the side wall of a second ring body (1301), the side wall of the second ring body (1301) being provided with a spiral groove (1303), a protrusion (503) being fixedly connected inside the first ring body (501), and the protrusion (503) being slidably fitted in the spiral groove (1303); The front side of the back shell (3) is covered and fixedly connected with a cover (1), the back side of the cover (1) is fixedly connected with a plurality of insertion rods (101), the side wall of the first ring body (501) is provided with slots (502), and the insertion rods (101) and the slots (502) cooperate with each other; A friction ring (8) is inserted and fixedly connected in the middle of the fixed shaft (9), and a plurality of engaging members (6) are arranged at equal angles on the outer side of the friction ring (8), one end of the engaging member (6) is rotatably connected to the second ring body (1301), and a U-shaped elastic member (7) is arranged on the back side of the engaging member (6), and the other side of the U-shaped elastic member (7) is in contact with the inner wall of the second ring body (1301).

2. A fall arrester according to claim 1, characterized in that: A coil spring (11) is sleeved and fixedly connected to the fixed shaft (9), and the other end of the coil spring (11) is fixedly connected to the inner wall of the take-up wheel (10).

3. A fall arrester according to claim 1, characterized in that: A spring (1203) is sleeved on the pin rod (1201), one end of the spring (1203) abuts against the support block (1202), and the other end abuts against a counterweight column preset at the end of the pin rod (1201), and the spring (1203) keeps the pin rod (1201) moving toward the fixed shaft (9).

4. A fall arrester according to claim 1, characterized in that: A plurality of bolts (2) are inserted through the edge of the cover (1), and the bolts (2) are threadedly connected to the back shell (3).

5. A fall arrester according to claim 1, characterized in that: A lifting ear (4) is provided at the upper end of the back shell (3), and a through hole is provided on the lifting ear (4).

6. A fall arrester according to claim 1, characterized in that: The lower end of the back shell (3) is provided with a through hole, and a wire loop is provided in the through hole, and the steel cable (14) passes through the middle of the wire loop.

7. A fall arrester according to claim 1, characterized in that: An indicator rod (504) is axially fixedly connected to the first ring body (501), and the indicator rod (504) is arranged to penetrate the cover (1).

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