Speed difference automatic controller capable of preventing accidental unlocking

Abstract

The invention particularly relates to the technical field of high-altitude operation, in particular to a speed difference automatic controller capable of preventing accidental unlocking, which is used for preventing falling and comprises a shell, a bin dividing plate is arranged in the middle of the shell, and the interior of the shell is divided into a front bin and a rear bin by the bin dividing plate; a front bin cover and a rear bin cover are respectively arranged on the outer sides of the front bin and the rear bin of the shell; a rope winding assembly and a safety rope are arranged in the front bin of the shell, one end of the safety rope is connected and wound on the rope winding assembly, and the other end of the safety rope is connected to a safety hook outside the shell; an anti-unlocking brake assembly and a flat spiral spring are arranged in a rear bin of the shell. Through the special technical scheme and structural design, a transition state is provided between a locking state and an unlocking state, so that after the speed difference automatic controller is locked, the safety rope must be intentionally retracted for a long distance to be unlocked, the situation that the speed difference automatic controller is accidentally unlocked is prevented, the reliability of the speed difference automatic controller is improved, and personnel are safer.

Description

Technical Field

[0001] The invention relates to the technical field of aerial work, and in particular to a speed difference automatic controller for preventing accidental unlocking for anti-falling purposes. Background Art

[0002] The speed differential controller is a fall prevention device whose safety rope can automatically retract and extend as the person moves. When in use, the speed differential controller is installed on an anchor point at high altitude, and connected to the person's lanyard through its built-in retractable safety rope; when the person descends normally, the safety rope will be pulled out with the person's descent; when the person climbs, the speed differential controller can automatically retract the safety rope; when the person falls accidentally, the speed differential controller will automatically lock the safety rope to prevent the person from falling. At present, the speed differential controller has been widely used in various industries, and the usage scenarios are complex and diverse. A common problem has emerged: after locking, the safety rope needs to maintain a stable tension state to provide a continuous locking function. If the pulled-out safety rope is very long, the person will bounce up and down after being locked; or if the person needs rescue after being locked, the rescue process causes the safety rope to be loosened and tightened at times. When the safety rope is relaxed, the existing speed differential automatic controller is very easy to unlock, causing the person to fall again, and then the locking function of the speed differential automatic controller is re-triggered, entering a cycle of locking, unlocking, locking again, and unlocking again, posing a threat to the safety of the personnel.

[0003] Obviously, it is of positive practical significance to develop a speed differential automatic controller that can prevent accidental unlocking after locking, and will not trigger unlocking due to a slight loosening of the safety rope, so as to maintain a stable locking state. Summary of the invention

[0004] In order to improve the problems of the existing speed differential automatic controller, the present invention provides a speed differential automatic controller that prevents accidental unlocking. Through its special design, after the speed differential automatic controller is locked, the safety rope must be intentionally retracted for a long distance before it can be unlocked, avoiding the locking instability caused by unexpected situations such as up and down bouncing and rescue misoperation, greatly improving the reliability of the speed differential automatic controller and making personnel safer. To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A speed differential automatic controller for preventing accidental unlocking, comprising: a shell, the outer contour of which is bilaterally symmetrical with the central vertical line as a reference; a mounting hole is provided in the middle of the uppermost part of the shell, a rope outlet hole is provided in the middle of the lowermost part of the shell, a compartment plate is provided in the middle of the shell, a first support sleeve is provided on the compartment plate, and the compartment plate divides the interior of the shell into a front compartment and a rear compartment; a groove is provided on the inner wall of the rear compartment of the housing. A front compartment cover and a rear compartment cover are provided on the outer sides of the front compartment and the rear compartment of the shell respectively; a second support sleeve is provided on the inner surface of the front compartment cover, and the second support sleeve is concentric with the outer contour arc of the front compartment cover, and the second support sleeve can be a sliding bearing or a rolling bearing. A brake groove is provided on the inner surface of the rear compartment cover, which is a groove arranged in a circle in a circle, and the number of grooves is 8, one side of the groove is a straight side, and the other side is a smooth curved side composed of a circular arc. A rope winding assembly and a safety rope are provided in the front compartment of the shell, one end of the safety rope is connected and wound around the rope winding assembly, and the other end extends out of the shell and is connected to the safety hook; an anti-unlocking brake assembly and a planar volute spring are provided in the rear compartment of the shell; when in use, the present invention is suspended and installed on an anchor point through a mounting hole on the shell, and the safety hook is connected to the personnel's lanyard; when the personnel descend normally, the safety rope is pulled out as the personnel descends, and the rope winding assembly, anti-unlocking brake assembly and planar volute spring inside the shell all rotate slowly as the safety rope is pulled out, and the planar volute spring stores torque in this process; when the personnel climbs, the planar volute spring releases torque, drives the rope winding assembly and the anti-unlocking brake assembly to rotate, and then recovers the safety rope.

[0006] In the above-mentioned speed differential automatic controller for preventing accidental unlocking, the anti-unlocking brake assembly includes a brake shaft, a friction disc, a brake disc, a second friction disc, a brake block, a tension spring and a clamping nut; the brake shaft is a cylindrical shaft with 5 steps; wherein step 1 and step 3 are smooth round rods, which respectively cooperate with the second support sleeve on the inner surface of the front compartment cover and the first support sleeve on the compartment plate in the shell for positioning and supporting, and can rotate the brake shaft; step 2 is provided with a keyway for connecting with the rope winding assembly through a key; step 4 is provided with a straight groove with a depth equal to the radius for installing the inner end hook of the plane volute spring; step 5 is provided with a symmetrical concave surface for connecting with the friction disc and the second friction disc, and the end of step 5 is also provided with an external thread for installing the clamping nut; the brake shaft passes through the center of the rope winding assembly, the plane volute spring, the friction disc, the brake disc, the second friction disc and the clamping nut in sequence; and transmits braking torque between the rope winding assembly, the friction disc and the second friction disc.

[0007] In the above-mentioned speed differential controller for preventing accidental unlocking, the center of the brake disc is a circular through hole, which is clearance-fitted with the brake shaft and no torque is transmitted between them; the brake disc is also provided with an idle groove and a stepped rivet, and the number of the idle grooves is 3, which are evenly distributed on the circumference; the stepped rivet is a 3-step shaft, the inner step is fixed to the brake disc by riveting, and the diameter of the outer step is 1.5 times the middle diameter of the tension spring hook ring, which is used to prevent the tension spring from falling out.

[0008] In the above-mentioned speed differential automatic controller for preventing accidental unlocking, the brake block is an arc-shaped strip, the width of which is 1.25 times the idle groove on the brake disc, which can prevent it from falling into the idle groove as a whole; an optical axis is provided on the side of one end of the brake block, and the other end is a sharp corner formed by the arc of the outer edge of the arc-shaped strip and a straight edge, which is used to embed into the brake groove; a spring mounting hole is also provided at the other corner formed by the arc of the inner edge of the arc-shaped strip and the straight edge, which is used to connect a tension spring; the optical axis passes through the idle groove on the brake disc, and can rotate while moving in the idle groove; one end of the tension spring is connected to the step rivet, and the other end is connected to the brake block.

[0009] In the above-mentioned speed differential controller that prevents accidental unlocking, the clamping nut is directly connected to the brake shaft through a thread. After tightening, the friction disc, brake disc, and second friction disc are compressed to generate friction to transmit the braking torque; when the speed differential controller is overloaded, slippage occurs between the friction disc, brake disc, and second friction disc, which plays a role in overload protection.

[0010] In the above-mentioned speed differential automatic controller for preventing accidental unlocking, when the brake disc is stationary or rotating slowly, the brake block is provided with a tension force by the tension spring and stays on the side of the idle groove close to the step rivet; when the brake disc rotates rapidly, the brake block overcomes the tension force of the tension spring by inertia and moves to the side away from the step rivet in the idle groove, and the outer edge of the brake block moves to the outside of the circumference by the centrifugal force, and then embeds into the brake groove to trigger the locking function. Different from the prior art, if the brake disc rotates a small amount due to the intermittent relaxation of the safety rope after locking, the space provided by the idle groove makes the brake disc not push the brake block when it rotates a small amount. At this time, the brake block can still be embedded in the brake groove under the action of the tension spring and maintain the locked state. This state provides a transition between the locked and unlocked states. At this time, if the safety rope is tightened again, the safety rope can be directly locked without the inertia and centrifugal force in the above process, eliminating the process of re-triggering the locking, and the person no longer falls, thereby achieving the purpose of preventing accidental unlocking of the present invention. When unlocking is really needed, the safety rope needs to be loosened further intentionally to retract a longer distance. The brake disc can drive the brake block to overcome the tension of the tension spring, so that the brake block is separated from the brake groove, thereby achieving unlocking. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, in which:

[0012] Figure 1 It is a stereogram of the present invention

[0013] Figure 2 This is an exploded view of the present invention

[0014] Figure 3 Another exploded view of the present invention

[0015] Figure 4 : is an exploded view of the anti-unlocking brake assembly of the present invention

[0016] Figure 5 This is a schematic diagram of the anti-unlocking brake assembly and the rear compartment cover of the present invention before locking.

[0017] Figure 6 This is a schematic diagram of the anti-unlocking brake assembly and the rear compartment cover of the present invention when the lock is triggered.

[0018] Figure 7 This is a schematic diagram of the anti-unlocking brake assembly and the rear compartment cover of the present invention when they are locked.

[0019] Figure 8 This is a schematic diagram of the anti-unlocking brake assembly and the rear compartment cover of the present invention when unlocking is required.

[0020] The following reference numerals are included in the drawings:

[0021] (1) housing; (11) mounting hole; (12) rope outlet hole; (13) compartment plate; (131) first support sleeve; (2) front compartment; (21) front compartment cover; (211) second support sleeve; (3) rear compartment; (30) groove; (31) rear compartment cover; (311) brake groove; (4) safety rope; (40) safety hook; (5) rope winding assembly; (51) key; (6) anti-unlocking brake assembly; (61) brake shaft; (611) keyway; (612) Straight groove; (613) concave surface; (614) external thread; (62) friction disc; (63) brake disc; (631) idle groove; (632) step rivet; (6311) initial end; (6312) terminal end; (64) second friction disc; (65) brake block; (651) optical axis; (652) spring mounting hole; (66) tension spring; (67) clamping nut; (7) plane scroll spring; (71) outer end hook; (72) inner end hook DETAILED DESCRIPTION

[0022] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings:

[0023] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a speed differential automatic controller for preventing accidental unlocking comprises a shell (1), the outer contour of the shell is symmetrical with respect to the central vertical line; a mounting hole (11) is provided in the middle of the uppermost part of the shell; a rope outlet hole (12) is provided in the middle of the lowermost part of the shell; a compartment plate (13) is provided in the middle of the shell, a first support sleeve (131) is provided on the compartment plate, and the compartment plate divides the interior of the shell (1) into a front compartment (2) and a rear compartment (3); a groove (30) is provided on the inner wall of the rear compartment; a front compartment cover (21) and a rear compartment cover (31) are respectively provided on the outer sides of the front compartment and the rear compartment, and are fixed to the shell by screws; a second support sleeve (211) is provided on the inner surface of the front compartment cover, and the second support sleeve is concentric with the outer contour arc of the front compartment cover; a brake groove (311) is provided on the inner surface of the rear compartment cover, and the brake groove (311) is provided on the inner surface of the rear compartment cover. The grooves are grooves evenly distributed in a circle, the number of the grooves is 8, one side of the grooves is a straight side, and the other side is a smooth curved side composed of arcs; a rope winding assembly (5) and a safety rope (4) are arranged in the front compartment, one end of the safety rope is connected to and wound on the rope winding assembly, and the other end of the safety rope extends from the rope outlet hole (12) of the shell (1) and is connected to the safety hook (40); a plane scroll spring (7) is arranged in the rear compartment, and the outer end hook (71) of the plane scroll spring is fixed in the groove (30) on the inner wall of the rear compartment; an anti-unlocking brake assembly (6) is also arranged in the rear compartment, and the anti-unlocking brake assembly comprises a brake shaft (61), a friction disc (62), a brake disc (63), a second friction disc (64), a brake block (65), a tension spring (66) and a clamping nut (67).

[0024] In further detail, the brake shaft (61) is a cylindrical shaft with five steps; wherein step 1 and step 3 are smooth round rods, respectively cooperating with a second support sleeve (211) on the inner surface of the front compartment cover (21) and a first support sleeve (131) on the compartment plate (13) for positioning and supporting, and enabling the brake shaft to rotate; step 2 is provided with a keyway (611) connected to the rope winding assembly (5) via a key (51); step 4 is provided with a straight groove (612) with a depth equal to a radius, for mounting the inner end hook of the planar volute spring (7); The step 5 is provided with a symmetrical concave surface (613) for connecting with the friction disc (62) and the second friction disc (64). The end of the step 5 is also provided with an external thread (614) for installing a clamping nut (67). The brake shaft (61) passes through the center of the rope winding assembly (5), the plane scroll spring (7), the friction disc (62), the brake disc (63), the second friction disc (64) and the clamping nut (67) in sequence, and transmits the braking torque between the rope winding assembly (5), the friction disc (62) and the second friction disc (64).

[0025] To elaborate further, the center of the brake disc (63) is a circular through hole, which is a clearance fit with the brake shaft (61), and the brake shaft (61) passes through it but does not directly transmit torque; the brake disc is also provided with an idle groove (631) and a stepped rivet (632), the idle groove (631) and the number of idle grooves is 3, which are evenly distributed on the circumference; the stepped rivet (632) has 3 steps, the inner step is fixed to the brake disc by riveting, and the diameter of the outer step is 1.5 times the middle diameter of the tension spring hook ring, which can prevent the tension spring from falling out.

[0026] To be more specific, the brake block (65) is an arc-shaped strip, the width of which is 1.25 times the width of the idle groove (631) on the brake disc, which can prevent it from sinking into the idle groove as a whole; an optical axis (651) is provided on the side of one end of the brake block, and the other end is a sharp corner formed by the arc of the outer edge of the arc-shaped strip and a straight edge, which is used to embed into the brake groove (311); a spring mounting hole (652) is also provided at the other corner formed by the arc of the inner edge of the arc-shaped strip and the straight edge, which is used to connect the tension spring; the optical axis (651) passes through the idle groove (631) on the brake disc, and can rotate while moving in the idle groove; one end of the tension spring (66) is connected to the step rivet (632), and the other end is connected to the brake block (65). When the brake disc (63) is stationary or rotates slowly, the brake block (65) is provided with a pulling force by the tension spring (66) and stays in the idle groove (631) on the side close to the step rivet (632), and this side is the initial end (6311); when the brake disc (63) rotates rapidly, the brake block (65) can overcome the pulling force of the tension spring (66) under the action of inertia and move in the idle groove (631) to the side away from the step rivet (632), and this side is the terminal end (6312). At the same time, under the action of centrifugal force, the outer edge of the brake block (65) moves toward the outside of the circumference.

[0027] To be more specific, the clamping nut (67) can compress the friction disc (62), the brake disc (63) and the second friction disc (64) after being tightened to a certain torque, so that friction is generated to transmit the braking torque. When the speed differential controller is overloaded, slippage occurs between the friction disc and the brake disc, thereby playing the role of overload protection.

[0028] During normal use, the present invention is suspended and installed on an anchor point through the mounting hole (11) at the top of the shell (1), and the personnel's lanyard is connected through the safety hook (40); when the personnel descends normally, the safety rope (4) is pulled out with the personnel's descent, and the rope winding assembly (5), the anti-unlocking brake assembly (6), and the plane scroll spring (7) inside the shell all rotate slowly as the safety rope is pulled out, and the plane scroll spring stores torque in this process; when the personnel climbs, the plane scroll spring releases torque, driving the rope winding assembly and the anti-unlocking brake assembly to rotate, thereby recovering the safety rope.

[0029] like Figure 5 As shown, the state before locking of the above-mentioned speed differential automatic controller for preventing accidental unlocking is: the personnel descend normally and pull the safety rope at a relatively slow speed, driving the rope winding assembly to rotate slowly clockwise, and then driving the friction disk and the brake disk (63) to rotate slowly clockwise through the brake shaft. Due to the slow rotation speed and small centrifugal force, the brake block (65) remains relatively still with the idle groove (631) under the action of the tension spring (66), and the locking action is not triggered.

[0030] like Figure 6 As shown, the state of triggering the locking of the speed differential automatic controller for preventing accidental unlocking is: when a person falls, the safety rope is quickly pulled out, driving the brake disc (63) to rotate rapidly clockwise, at which time the brake block (65) overcomes the pulling force of the tension spring (66) under the action of inertia to maintain its position, and the position of the brake block (65) relative to the idle groove (631) begins to change, and the contact portion between the idle groove and the brake block (65) gradually moves from the initial end (6311) to the terminal end (6312); after the brake block (65) contacts the terminal end (6312), it is pushed by the terminal end to rotate clockwise together with the brake disc, and then under the action of centrifugal force, the outer edge of the brake block (65) overcomes the pulling force of the tension spring (66) and moves to the outside of the circumference, and finally embeds into the brake groove (311) to trigger the locking function, generating a braking torque to stop the person from falling. Since there are 8 brake grooves and 3 brake blocks, when one brake block triggers locking, the other two brake blocks cannot be embedded in the brake groove due to different angles, and return to the initial end under the action of the tension spring.

[0031] like Figure 7 As shown, the above-mentioned speed differential automatic controller for preventing accidental unlocking maintains a locked state: in the locked state, the brake disc (63) rotates a little due to the intermittent loosening of the safety rope, and the space provided between the initial end (6311) and the terminal end (6312) allows the brake disc to rotate a little without pushing the brake block (65). At this time, the brake block can still remain embedded in the brake groove (311) under the action of the tension spring (66). As the safety rope is intermittently loosened and tightened, the terminal end (6312) and the initial end (6311) of the idle groove can reciprocate on both sides of the optical axis (651) of the brake block (65), providing a transition state between the locked and unlocked states, and not triggering unlocking; in this state, the safety rope is tightened again, and the safety rope can be directly locked without the action of inertia and centrifugal force, eliminating the process of re-triggering the lock, and the person does not fall again, thereby achieving the purpose of preventing accidental unlocking of the present invention.

[0032] like Figure 8As shown, the state of the above-mentioned speed differential automatic controller for preventing accidental unlocking when unlocking is required is: when the personnel have been safely rescued and unlocking is required, it is only necessary to intentionally loosen the safety rope further to retract the safety rope for a longer distance, the brake disc (63) rotates more, and the initial end (6311) of the idle groove begins to push the brake block (65) to move away from the brake groove (311), thereby separating the brake block from the brake groove, and the outer edge of the brake block moves toward the inside of the circumference under the action of the tension spring (66), completing the unlocking process, and finally returning to the state as shown in FIG. Figure 3 The pre-locking state is shown.

[0033] In summary, the speed differential controller for preventing accidental unlocking described in the present invention can avoid accidental unlocking of the speed differential controller through its special technical solution and structural design, greatly improve the locking reliability of the speed differential controller, and make personnel safer.

[0034] The specific implementation described above is only one embodiment of the present invention, not all embodiments. Based on the spirit and principle of the present invention, any modification, equivalent replacement, improvement, etc. made by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

Claims

1. A speed differential automatic controller for preventing accidental unlocking, characterized in that include: A shell, wherein a compartment plate is provided in the middle of the shell, a first support sleeve is provided on the compartment plate, and the compartment plate divides the interior of the shell into a front compartment and a rear compartment; a front compartment cover and a rear compartment cover are provided on the outer sides of the front compartment and the rear compartment of the shell respectively; a second support sleeve is provided on the inner surface of the front compartment cover; a brake groove is provided on the rear compartment cover, and the brake groove is a groove evenly arranged in a circle; a rope winding assembly and a safety rope are provided in the front compartment of the shell, one end of the safety rope is connected and wound around the rope winding assembly, and the other end is connected to the safety hook outside the shell; an anti-unlocking brake assembly and a planar volute spring are provided in the rear compartment of the shell; the anti-unlocking brake assembly comprises a brake shaft, a friction disc, a brake disc, a second friction disc, a brake block, a tension spring and a clamping nut; The brake shaft is positioned and supported by a first support sleeve on the compartment plate in the housing and a second support sleeve on the inner surface of the front compartment cover; The brake disc is provided with an idle groove and a step rivet; the brake block is provided with an optical axis, which passes through the idle groove on the brake disc and can rotate while moving in the idle groove; one end of the tension spring is connected to the step rivet, and the other end is connected to the brake block; when the brake disc is stationary or rotating slowly, the brake block stays on the side of the idle groove close to the step rivet under the action of the tension spring; when the brake disc rotates rapidly, the brake block moves in the idle groove to the side away from the step rivet under the action of inertia, and under the action of centrifugal force, the outer edge of the brake block moves to the outside of the circumference and then embeds into the brake groove; when the brake disc rotates, the space provided by the idle groove enables the brake block to remain embedded in the brake groove under the action of the tension spring; The clamping nut is directly connected to the brake shaft through threads, and after being tightened, the friction disc, the brake disc and the second friction disc are compressed to generate friction to transmit the braking torque.

2. A speed differential automatic controller for preventing accidental unlocking according to claim 1, characterized in that: The outer contour of the shell is bilaterally symmetrical with the central vertical line as a reference; a mounting hole is provided in the middle of the uppermost portion of the shell, a rope outlet hole is provided in the middle of the lowermost portion of the shell, and a groove is provided on the inner wall of the rear compartment of the casing.

3. A speed differential automatic controller for preventing accidental unlocking according to claim 1, characterized in that: The second support sleeve on the inner surface of the front compartment cover is concentric with the outer contour arc of the front compartment cover; the second support sleeve is a sliding bearing or a rolling bearing.

4. A speed differential automatic controller for preventing accidental unlocking according to claim 1, characterized in that: The number of grooves of the brake groove is 8, one side of the groove is a straight side, and the other side is a smooth curved side composed of arcs.

5. The speed differential automatic controller for preventing accidental unlocking according to claim 1, characterized in that: The brake shaft is a cylindrical shaft with 5 steps; among which step 1 and step 3 are smooth round rods; step 2 is provided with a keyway; step 4 is provided with a straight groove with a depth equal to the radius of the circumferential axis; step 5 is provided with a symmetrical concave surface and an external thread at the end; the brake shaft passes through the center of the rope winding assembly, the flat scroll spring, the friction disc, the brake disc, the second friction disc and the clamping nut in sequence, and transmits the braking torque among the rope winding assembly, the friction disc and the second friction disc.

6. A speed differential automatic controller for preventing accidental unlocking according to claim 1, characterized in that: The outer end and the inner end of the plane spiral spring are both provided with hooks, the outer end hook is embedded in the groove on the inner wall of the rear compartment of the casing, and the inner end hook is embedded in the straight groove on the brake shaft.

7. A speed differential automatic controller for preventing accidental unlocking according to claim 1, characterized in that: The center of the brake disc is a circular through hole, which is a clearance fit with the brake shaft; the number of idle grooves on the brake disc is 3, which are evenly distributed on the circumference; the stepped rivets on the brake disc have 3 steps, the inner step is fixed to the brake disc by riveting, and the diameter of the outer step is 1.5 times the middle diameter of the tension spring hook ring, which is used to prevent the tension spring from falling out.

8. The speed differential automatic controller for preventing accidental unlocking according to claim 1, characterized in that: The brake block is an arc-shaped strip, the width of which is 1.25 times the idle groove on the brake disc; an optical axis is provided on the side of one end of the brake block; the other end is a sharp corner formed by the arc of the outer edge of the arc-shaped strip and a straight edge, which is used to embed into the brake groove; a spring mounting hole is also provided at the other corner formed by the arc of the inner edge of the arc-shaped strip and the straight edge, which is used to connect the tension spring.

9. The speed differential automatic controller for preventing accidental unlocking according to claim 1, characterized in that: When the speed differential controller is overloaded, slippage occurs between the friction disc, the brake disc and the second friction disc.

10. The brake groove and brake disc according to claim 4 and claim 7, characterized in that: The ratio of the number of the braking grooves to the number of the idling grooves is 8:3.

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