Manual triggering device of elevator speed governor

Abstract

The utility model discloses a manual triggering device of an elevator speed limiter. The manual triggering device comprises a rope wheel (1), a first centrifugal hammer (2), a second centrifugal hammer (3), a connecting rod (4), a tripping rod (5), a pawl (6), a ratchet wheel (7) and a pull rod (8). The first centrifugal hammer (2) and the second centrifugal hammer (3) are connected to spokes of the rope wheel (1) respectively, the end portion of the end, connected with the second centrifugal hammer (3), of the connecting rod (4) protrudes outwards to form a connecting rod triggering end (10), a manual triggering device is arranged on the rack (9), and the manual triggering device extends inwards in the radial direction to abut against the connecting rod triggering end (10) to trigger the speed limiter. The device adopts an independent manual triggering device and is mounted on the outer side of the rack, so that the device is safer and more convenient to operate and can be adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator parts, in particular to a manual triggering device for an elevator speed limiter. Background Art

[0002] At present, there is a disclosed elevator speed limiter, which includes a machine base, a rope pulley, a centrifugal hammer, a ratchet, a pawl, a braking device and a manual triggering device. The machine base is a U-shaped structure. The rope pulley is pivotally connected to the machine base through a rope pulley shaft. The wire rope is passed around the rope pulley. The centrifugal hammer is symmetrically and rotatably pivoted to the rope pulley through the centrifugal hammer shaft. An electrical switch is also installed on the machine base. A striking plate is installed on the electrical switch. An electrical switch striker is provided on the centrifugal hammer. The ratchet is rotatably mounted on the rope pulley shaft. The pawl is rotatably mounted on the rope pulley coaxially with the centrifugal hammer, and the pawl and the ratchet always tend to be staggered. An actuating screw is installed on the end of the pawl away from the ratchet; one end of the braking device is pivoted to the ratchet, and the other end is pivoted to the machine base. The manual trigger device includes a brake wire, a brake wire seat, a trigger paddle, a paddle shaft, a reset spring, and a trigger firing pin. The brake wire seat is fixed to the machine base, and the brake wire passes through the mounting hole of the brake wire seat and is rotatably connected to one end of the trigger paddle. The other end of the trigger paddle is rotatably mounted on the machine base through the paddle shaft. One end of the reset spring is fixed to the machine base, and the other end is connected to the pivot where the brake wire and the trigger paddle are pivotally connected. The trigger firing pin is mounted on the centrifugal hammer. The working principle of the manual triggering of the speed limiter of this structure is as follows: when inspecting the elevator speed limiter and safety clamp, the elevator is made to run downward at the inspection speed or rated speed, and the manual trigger brake wire is pulled by hand to rotate the trigger paddle connected to it and collide with the manual trigger striker on the centrifugal hammer, forcing the centrifugal hammer to rotate. When the centrifugal hammer rotates to the first speed limit position, the electrical switch striker on it hits the electrical switch plate, the elevator safety circuit is disconnected, and the elevator is stopped urgently; when the centrifugal hammer continues to rotate to the second speed limit position, the pawl is engaged with the ratchet by the actuating screw, and the braking device is driven by the slight rotation of the ratchet to realize the braking of the elevator speed limiter.

[0003] The reset of the elevator speed limiter with the above structure is achieved by the operator pulling the manual trigger wire to rotate the trigger paddle connected to it and collide with the manual trigger striker on the centrifugal hammer. This device has safety hazards when manually triggered, and it is impossible to accurately calculate the pulling distance of the wire, which brings inconvenience to actual operation. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a manual triggering device for an elevator speed limiter which adopts a separate manual triggering device and is installed on the outside of a frame, is safer and more convenient to operate and can be adjusted.

[0005] The technical solution of the utility model is to provide a manual triggering device of an elevator speed governor with the following structure, comprising a sheave, a first centrifugal hammer and a second centrifugal hammer, a connecting rod, a tripping rod, a pawl, a ratchet and a pull rod; the sheave is rotatably connected to the frame via a rotating shaft, the ratchet is coaxially connected to the sheave, the first centrifugal hammer and the second centrifugal hammer are respectively connected to the spokes of the sheave, one end of the connecting rod is connected to the first centrifugal hammer, and the other end is connected to the second centrifugal hammer; the tripping rod and the pawl are mounted on the spokes of the sheave and positioned by the tripping rod; it is characterized in that: the end portion of the connecting rod connected to the second centrifugal hammer protrudes outward to form a connecting rod triggering end, the frame is provided with a manual triggering device, and the manual triggering device extends radially inward to abut against the connecting rod triggering end to trigger the speed governor.

[0006] The manual trigger device includes a bracket, a slider and a push rod, the bracket is installed on the frame, the push rod moves through the bracket, and the slider is fixed to the end of the push rod passing through the bracket; in a normal state, a gap is set between the slider and the connecting rod trigger end of the connecting rod; in the trigger state, the push rod moves toward the pulley and pushes the slider to a set position to collide with the connecting rod trigger end to trigger the speed limiter.

[0007] After the speed limiter is triggered, the connecting rod drives the centrifugal hammer, which in turn drives the tripping rod, and releases the pawl to engage the ratchet, pulling the pull rod to clamp the wire rope.

[0008] The outer end surface of the slider includes a guide surface and a touch surface, the touch surface is convex on the guide surface, and the connecting rod trigger end enters the touch surface along the guide surface.

[0009] The manual trigger device also includes a positioning plate, a spring, a first positioning rod and a second positioning rod. The positioning plate is fixed to the outer end of the push rod. The spring is sleeved on the push rod for resetting. One end of the first positioning rod is fixed to the positioning plate, and the other end is a distance away from the bracket. One end of the second positioning rod is fixed to the bracket, and the other end is a distance away from the positioning plate.

[0010] When the manual trigger device is in the inward pushing state, it pushes the positioning plate inward to extend the slider inward, one end of the first positioning rod abuts against the bracket, and one end of the second positioning rod abuts against the positioning plate, thereby positioning the distance the slider extends.

[0011] The first positioning rod and the positioning plate, as well as the second positioning rod and the bracket are all fixed by screws and nuts, and the extension distances are adjusted.

[0012] With the above structure, the present invention has the following advantages: 1. A separate manual triggering device is used on the frame to trigger the speed governor, which does not affect the operation of the speed governor itself, allowing the speed governor to operate normally. 2. The manual triggering device extends radially inward to contact the triggering end of the connecting rod to trigger the speed governor. The extension distance can be precisely adjusted, thereby accurately calculating the contact distance between the manual triggering device and the triggering end of the connecting rod, making debugging more convenient.

[0013] As an improvement, the manual trigger device includes a bracket, a slider and a push rod, the bracket is installed on the frame, the push rod moves through the bracket, and the slider is fixed to the end of the push rod passing through the bracket; in a normal state, a gap is provided between the slider and the connecting rod trigger end of the connecting rod; in the triggering state, the push rod moves toward the direction of the rope pulley and pushes the slider to the set position to collide with the connecting rod trigger end to trigger the speed limiter. The structure is simple, the triggering operation is direct, and the reliability is excellent.

[0014] As an improvement, after the speed limiter is triggered, the connecting rod drives the centrifugal hammer, which in turn drives the tripping rod, and releases the pawl to engage the ratchet, pulling the pull rod to clamp the wire rope. The braking operation logic is simple and the braking efficiency is increased.

[0015] As an improvement, the outer end surface of the slider includes a guide surface and a touch surface, the touch surface is convex on the guide surface, and the trigger end of the connecting rod enters the touch surface along the guide surface, making the triggering smoother.

[0016] As an improvement, the manual trigger device also includes a positioning plate, a spring, a first positioning rod and a second positioning rod. The positioning plate is fixed to the outer end of the push rod, and the spring is sleeved on the push rod for resetting. One end of the first positioning rod is fixed to the positioning plate, and the other end is a distance away from the bracket. One end of the second positioning rod is fixed to the bracket, and the other end is a distance away from the positioning plate, thereby increasing positioning and resetting and making operation more convenient.

[0017] As an improvement, the manual trigger device is in the inward push state, pushing the positioning plate inward to extend the slider inward, one end of the first positioning rod is against the bracket, and one end of the second positioning rod is against the positioning plate, thereby positioning the distance of the slider extension, double positioning, to ensure the extension distance

[0018] As an improvement, the first positioning rod and the positioning plate, and the second positioning rod and the bracket are all fixed with screws and nuts, and the extension distance is adjusted to increase adjustability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a split schematic diagram of the speed governor of an elevator of the present invention.

[0020] Figure 2 It is a schematic diagram of the interior of the elevator speed governor of the present invention.

[0021] Figure 3 This is another schematic diagram of the interior of the elevator speed governor of the present invention.

[0022] Figure 4 It is a schematic diagram of a manual triggering device of the present invention.

[0023] Figure 5 This is another schematic diagram of the manual triggering device of the present invention.

[0024] Figure 6 This is a schematic diagram of the elevator speed governor of the present utility model in normal operating state.

[0025] Figure 7 This is a schematic diagram of the elevator speed governor of the present invention in a state about to be triggered.

[0026] Figure 8 This is a schematic diagram of the elevator speed governor of the present invention in a triggered state.

[0027] Shown in the figure: 1. Pulley, 2. First centrifugal hammer, 3. Second centrifugal hammer, 4. Connecting rod, 5. Tripping rod, 6. Pawl, 7. Ratchet, 8. Pull rod, 9. Frame, 10. Connecting rod trigger end, 11. Bracket, 12. Push rod, 13. Slider, 14. Guide surface, 15. Touch surface, 16. Positioning plate, 17. First positioning rod, 18. Second positioning rod, 19. Positioning plate. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] like Figure 1-3 As shown, the manual triggering device of the elevator speed limiter of the present invention includes a sheave 1, a first centrifugal hammer 2 and a second centrifugal hammer 3, a connecting rod 4, a tripping rod 5, a pawl 6, a ratchet 7 and a pull rod 8; the sheave 1 is rotatably connected to the frame 9 through a rotating shaft, the ratchet 7 is coaxially connected to the sheave 1, the first centrifugal hammer 2 and the second centrifugal hammer 3 are respectively connected to the spokes of the sheave 1, one end of the connecting rod 4 is connected to the first centrifugal hammer 2, and the other end is connected to the second centrifugal hammer 3; the tripping rod 5 and the pawl 6 are mounted on the spokes of the sheave 1 and are positioned by the tripping rod 5.

[0030] One end of the connecting rod 4 connected to the second centrifugal hammer 3 protrudes outward to form a connecting rod trigger end 10, and a manual trigger device is provided on the frame 9. The manual trigger device extends radially inward and abuts against the connecting rod trigger end 10 to trigger the speed limiter.

[0031] like Figure 4 and Figure 5As shown, the manual triggering device includes a bracket 11, a slider 13, and a push rod 12. The bracket 11 is mounted on the frame 9. The push rod 12 moves through the bracket 11. The slider 13 is fixed to the end of the push rod 12 that passes through the bracket 11. In the normal state, there is a gap between the slider 13 and the connecting rod triggering end 10 of the connecting rod 4. In the triggering state, the push rod 12 moves toward the rope pulley and pushes the slider 13 to a set position, where it collides with the connecting rod triggering end 10, triggering the speed limiter. After the speed limiter is triggered, the connecting rod 4 drives the second centrifugal hammer 3, which in turn drives the tripping rod 5. The pawl 6 is released and engages the ratchet 7, pulling the pull rod 8 to clamp the wire rope.

[0032] like Figure 4 As shown, the outer end surface of the slider 13 includes a guide surface 14 and a touch surface 15 . The touch surface 15 is convex on the guide surface 14 , and the connecting rod trigger end 10 enters the touch surface 15 along the guide surface 14 .

[0033] like Figure 5 As shown, the manual trigger device also includes a positioning plate 19, a spring, a first positioning rod 17 and a second positioning rod 18. The positioning plate 19 is fixed to the outer end of the push rod 12, and the spring is sleeved on the push rod 12 for resetting. One end of the first positioning rod 17 is fixed to the positioning plate 19, and the other end is a distance away from the bracket 11. One end of the second positioning rod 18 is fixed to the bracket 11, and the other end is a distance away from the positioning plate 19.

[0034] When the manual trigger device is in the inward push state, it pushes the positioning plate 19 inward to extend the slider 13 inward. One end of the first positioning rod 18 abuts against the bracket 11, and one end of the second positioning rod 19 abuts against the positioning plate 19, thereby positioning the distance the slider 13 extends.

[0035] The first positioning rod 17 and the positioning plate 19, as well as the second positioning rod 18 and the bracket 11 are fixed with screws and nuts, and the extension distances are adjustable.

[0036] like Figure 6 As shown, the elevator speed limiter of the present invention is in normal operating state. At this time, the positioning plate 19 of the manual trigger device has not moved inward. At this time, the distance between the slider 13 and the connecting rod trigger end 10 of the connecting rod 4 is the same, and the speed limiter is operating normally.

[0037] like Figure 7 As shown, the operator pushes the positioning plate 19 inward for a distance, so that the slider 13 approaches the connecting rod trigger end 10 , and at this time, the guide surface 14 of the slider 13 touches the connecting rod trigger end 10 .

[0038] like Figure 8As shown, the operator pushes the positioning plate 19 inward for a distance, so that the contact surface 15 of the slider 13 touches the connecting rod trigger end 10. After the speed limiter is triggered, the connecting rod 4 drives the second centrifugal hammer 3, and then drives the tripping rod 5, and releases the pawl 6 to buckle into the ratchet 7, pulling the pull rod 8 to clamp the wire rope.

Claims

1. A manual triggering device for an elevator speed governor, comprising a rope pulley (1), a first centrifugal hammer (2), a second centrifugal hammer (3), a connecting rod (4), a tripping rod (5), a pawl (6), a ratchet (7) and a pull rod (8); the rope pulley (1) is rotatably connected to a frame (9) via a rotating shaft, the ratchet (7) is coaxially connected to the rope pulley (1), the first centrifugal hammer (2) and the second centrifugal hammer (3) are respectively connected to the spokes of the rope pulley (1), one end of the connecting rod (4) is connected to the first centrifugal hammer (2), and the other end is connected to the second centrifugal hammer (3); the tripping rod (5) and the pawl (6) are mounted on the spokes of the rope pulley (1) and positioned by the tripping rod (5); characterized in that: One end of the connecting rod (4) connected to the second centrifugal hammer (3) protrudes outward to form a connecting rod trigger end (10), and a manual trigger device is provided on the frame (9). The manual trigger device extends radially inward to abut against the connecting rod trigger end (10) to trigger the speed limiter.

2. The manual triggering device for an elevator speed governor according to claim 1, characterized in that: The manual trigger device comprises a bracket (11), a slider (13) and a push rod (12); the bracket (11) is mounted on a machine frame (9); the push rod (12) movably passes through the bracket (11); the slider (13) is fixed to the end of the push rod (12) passing through the bracket (11); in a normal state, a distance is provided between the slider (13) and the connecting rod triggering end (10) of the connecting rod (4); in a triggering state, the push rod (12) moves toward the rope wheel and pushes the slider (13) to a set position to collide with the connecting rod triggering end (10) to trigger the speed limiter.

3. The manual triggering device for an elevator speed governor according to claim 2, characterized in that: After the speed limiter is triggered, the connecting rod (4) drives the centrifugal hammer, which in turn drives the tripping rod (5), and releases the pawl (6) to buckle into the ratchet (7), pulling the pull rod (8) to clamp the wire rope.

4. The manual triggering device for an elevator speed governor according to claim 2, characterized in that: The outer end surface of the slider (13) includes a guide surface (14) and a touch surface (15); the touch surface (15) is convex on the guide surface (14); and the connecting rod trigger end (10) enters the touch surface (15) along the guide surface (14).

5. The manual triggering device for an elevator speed governor according to claim 2, characterized in that: The manual trigger device further comprises a positioning plate (19), a spring, a first positioning rod (17) and a second positioning rod (18), wherein the positioning plate (19) is fixed to the outer end of the push rod (12), the spring is sleeved on the push rod (12) and is used for resetting, one end of the first positioning rod (17) is fixed to the positioning plate (19), and the other end is a distance away from the bracket (11), and one end of the second positioning rod (18) is fixed to the bracket (11), and the other end is a distance away from the positioning plate (19).

6. The manual triggering device for an elevator speed governor according to claim 5, characterized in that: When the manual trigger device is in an inward pushing state, it pushes the positioning plate (19) inward to cause the slider (13) to extend inward, one end of the first positioning rod (17) abuts against the bracket (11), and one end of the second positioning rod (18) abuts against the positioning plate (19), thereby determining the extension distance of the positioning slider (13).

7. The manual triggering device for an elevator speed governor according to claim 5, characterized in that: The first positioning rod (17) and the positioning plate (19), as well as the second positioning rod (18) and the bracket (11) are all fixed by screws and nuts, and the extension distances are adjusted.

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