Elevator speed limiter

Abstract

The present invention discloses an elevator speed limiter, the main shaft of which is supported by a second one-way bearing and a third one-way bearing; the rope wheel is connected to the main shaft through a first one-way bearing; the first detection mechanism body is fixed to the side of the rope wheel and rotates synchronously with the rope wheel; the second detection mechanism body is fixed to the main shaft and rotates synchronously with the main shaft; the locking directions of the first one-way bearing, the second one-way bearing and the third one-way bearing are opposite; when the first detection mechanism body detects that the rotational speed of the rope wheel is greater than the first angular velocity set value, the first pawl triggers the first safety switch; when the second detection mechanism body detects that the rotational speed of the main shaft is greater than the second angular velocity set value, the second pawl triggers the second safety switch. The elevator speed limiter of the present invention runs more smoothly, has low running noise and small axial installation dimensions.

Description

Technical Field

[0001] The present invention relates to elevator components, and particularly to an elevator speed governor. Background Art

[0002] In an elevator, a speed governor is provided to urgently stop the car when the car gets into an overspeed state. The speed governor has a speed governor rope that moves at the same speed as the car, a rope wheel around which the speed governor rope is wound, and a speed governor counterweight that is displaced by a centrifugal force that changes depending on the rotational speed of the rope wheel. When the car becomes overspeed, a driving member mechanically coupled to the speed governor counterweight actuates a stop switch to cut off the power supply of the traction machine. When the speed of the car further increases after the power supply is cut off (when the car is descending), another driving member coupled to the speed governor counterweight actuates a rope clamping mechanism, whereby a safety gear device is actuated.

[0003] In recent years, in, for example, ultra-high-speed elevators, etc., there is a case where the rated speed of the car during ascent is increased compared to the rated speed during descent of the car. In this case, as the speed threshold for actuating the stop switch, i.e., the overspeed, is also set to different values during car ascent and car descent. Therefore, in order to cope with different overspeeds during ascent and descent, the following operations are performed: two detection mechanism bodies (a first detection mechanism body and a second detection mechanism body) are provided in the speed governor, and these detection mechanism bodies are appropriately combined and actuated, or these detection mechanism bodies are selectively actuated.

[0004] The elevator speed governor disclosed in Chinese Patent Application CN201520403211.X has 2 sets of independent speed detection mechanisms with different trigger speeds when the car runs up and down. It has the following problems:

[0005] 1) When the elevator goes up and down, the main shaft of the speed governor rotates, and the noise is relatively large at high speeds.

[0006] 2) Since both sets of detection mechanism bodies need to isolate or transmit rotation through one-way clutches, the overall axial dimension is relatively large. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide an elevator speed governor that runs more smoothly, has low running noise, and has a small installation dimension in the axial direction.

[0008] To solve the above technical problem, the elevator speed governor provided by the present invention includes:

[0009] A main shaft 141, supported by a second one-way bearing 132 and a third one-way bearing 133;

[0010] A rope wheel 101, connected to the main shaft 141 through a first one-way bearing 131;

[0011] The first detection mechanism body 111 is fixed to the side surface of the rope pulley 101 and rotates synchronously with the rope pulley 101;

[0012] The second detection mechanism body 112 is fixed to the main shaft 141 and rotates synchronously with the main shaft 141;

[0013] The locking directions of the first one-way bearing 131, the second one-way bearing 132, and the third one-way bearing 133 are opposite;

[0014] When the first detection mechanism body 111 detects that the rotation speed of the rope pulley 101 is greater than the first angular velocity set value, the first pawl 113 triggers the first safety switch;

[0015] When the second detection mechanism body 112 detects that the rotation speed of the main shaft 141 is greater than the second angular velocity set value, the second pawl 114 triggers the second safety switch.

[0016] Preferably, the elevator speed limiter further includes a ratchet wheel 20 and a third pawl 115;

[0017] The ratchet wheel 20 is sleeved on the main shaft 141 and can rotate around the main shaft, and is located on the near-axis side of the third pawl 115;

[0018] The third pawl 115 is fixed to the main shaft 141 and rotates synchronously with the main shaft 141;

[0019] When the second detection mechanism body 112 detects that the rotation speed of the main shaft 141 is greater than the third angular velocity set value, the third pawl 115 is opened to engage with the periphery of the ratchet wheel 20 to drive the ratchet wheel 20 to rotate synchronously;

[0020] The third angular velocity set value is greater than the second angular velocity set value.

[0021] Preferably, when the rope pulley 101 rotates counterclockwise, the first one-way bearing 131 is locked so that the main shaft 141 rotates with the rope pulley 101, and at the same time drives the second detection mechanism body 112 to rotate synchronously with the main shaft 141;

[0022] When the rope pulley 101 rotates clockwise, the first one-way bearing 131 rotates freely in the same direction as the rope pulley 101, and the second one-way bearing 132 and the third one-way bearing 133 are locked, and the main shaft 141 does not rotate with the rope pulley 101 and remains stationary.

[0023] Preferably, when the car ascends, the rope pulley 101 rotates clockwise, the first one-way bearing 131 rotates freely in the same direction as the rope pulley 101, and the second one-way bearing 132 and the third one-way bearing 133 are locked; when the first detection mechanism body 111 detects that the rotational speed of the rope pulley 101 is greater than the first angular velocity set value, the first pawl 113 triggers the first safety switch, thereby triggering the upward protection device of the elevator car;

[0024] When the car descends, the rope pulley 101 rotates counterclockwise, the first one-way bearing 131 is locked to make the main shaft 141 rotate with the rope pulley 101, and at the same time drives the second detection mechanism body 112 to rotate synchronously with the main shaft 141; when the second detection mechanism body 112 detects that the rotational speed of the main shaft 141 is greater than the second angular velocity set value, the second pawl 114 triggers the second safety switch, thereby making the elevator brake act; when the second detection mechanism body 112 detects that the rotational speed of the main shaft 141 is greater than the third angular velocity set value, and makes the third pawl 115 open and snap into the periphery of the ratchet wheel 20 to drive the ratchet wheel 20 to rotate synchronously, and the rotation of the ratchet wheel 20 triggers the safety clamp of the elevator.

[0025] Preferably, the rotation of the ratchet wheel 20 triggers a boss 116, thereby pushing the trigger rod 121, and subsequently further triggers the safety clamp of the elevator.

[0026] Preferably, the first angular velocity set value is greater than the second angular velocity set value.

[0027] Preferably, both ends of the main shaft 141 are supported by the second one-way bearing 132 and the third one-way bearing 133.

[0028] Preferably, the one-way bearing adopts a wedge design.

[0029] Preferably, the first detection mechanism body 111 is integrally integrated with the rope pulley 101 in structure and rotates synchronously with the rope pulley 101.

[0030] Preferably, the governor wire rope bypasses the groove of the rope pulley 101, and both ends of the governor wire rope are connected to the car and the counterweight respectively. When the car moves up and down, the rope pulley 101 is driven to rotate by the governor wire rope.

[0031] Preferably, the second detection mechanism body 112 is connected to the auxiliary shaft by a one-way coupling, and the auxiliary shaft is connected to the main shaft by a one-way coupling, so that the second detection mechanism body 112 is fixed to the main shaft 141 and rotates synchronously with the main shaft 141.

[0032] Preferably, the first detection mechanism body 111 includes a first crank 31, a second crank 32, a first connecting rod 33, a second connecting rod 34, a first stop piece 35, a first limit piece 36, a first speed regulating spiral spring 37, a first weight 38, a first crank shaft 39, a second crank shaft, a first acting piece 40, a first tension spring 41, and a first pawl 113;

[0033] The first crank 31 and the second crank 32 are pivotally fixed to the same side of the rope pulley 101 through a first crankshaft 39 and a second crankshaft that are symmetric about the main shaft 141 respectively in the middle.

[0034] Both ends of the first connecting rod 33 are connected to the left end of the first crank 31 and the left part of the second crank 32 respectively.

[0035] Both ends of the second connecting rod 34 are connected to the right part of the first crank 31 and the right end of the second crank 32 respectively.

[0036] The first crank 31, the second crank 32, the first connecting rod 33, the second connecting rod 34, the first crankshaft 39, and the second crankshaft together form a parallelogram linkage mechanism.

[0037] The first weight 38 is connected to the right end of the first crank 31.

[0038] A first limit piece 36 is fixed to the upper part of the first connecting rod 33.

[0039] The middle part of the first connecting rod 33 passes through the middle through hole of the first stop piece 35.

[0040] The first stop piece 35 is fixed to the rope pulley 101.

[0041] A first speed regulation spiral spring 37 is sleeved outside the first connecting rod 33, and its two ends respectively abut against the first limit piece 36 and the first stop piece 35.

[0042] The middle part of the first pawl 113 is pivotally fixed to the rope pulley 101, and its end is connected to the rope pulley 101 through a first tension spring 41.

[0043] The middle part of the first actuating member 40 is pivotally fixed to the first crank 31.

[0044] For the first actuating member 40, the tail is connected to the rope pulley 101 through an actuating tension spring, and the head locks the first pawl 113 in the initial position through a pin.

[0045] When the first pawl 113 is locked in the initial position, the first tension spring 41 is in a stretched state.

[0046] Preferably, the first limit piece 36 is fixed to the upper part of the first connecting rod 33 by threading.

[0047] The overspeed governor of the present invention has two sets of independent speed detection mechanism bodies and three one-way bearings in its main transmission structure; the overspeed governor of the elevator adopts one-way bearings, which runs more smoothly compared with the ratchet-type one-way clutch; and the main shaft 141 only rotates when going up or down, reducing the running noise. The overspeed governor of the elevator also integrates the structure of the first detection mechanism body 111 onto the side of the rope wheel 101, reducing the axial installation size and can be used for a more compact elevator machine room layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions of the present invention, the following briefly introduces the drawings required for the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0049] Figure 1 is a structural diagram of an embodiment of the overspeed governor of the present invention;

[0050] Figure 2 is a schematic structural diagram of the first detection mechanism body of an embodiment of the overspeed governor of the present invention.

[0051] Explanation of the reference numerals in the drawings:

[0052] 101 rope wheel; 111 first detection mechanism body; 112 second detection mechanism body; 113 first pawl; 114 second pawl; 115 third pawl; 116 boss; 121 trigger rod; 131 first one-way bearing; 132 second one-way bearing; 133 third one-way bearing; 141 main shaft; 20 ratchet; 31 first crank; 32 second crank; 33 first connecting rod; 34 second connecting rod; 35 first retaining piece; 36 first limiting piece; 37 first speed regulating spiral spring; 38 first weight; 39 first crankshaft; 40 first operating member; 41 first tension spring; 408 jacking bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0053] The following will clearly and completely describe the technical solutions in the present invention in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.

[0054] Embodiment 1

[0055] As Figure 1 shown, the overspeed governor of the elevator includes:

[0056] The main shaft 141 is supported by the second one-way bearing 132 and the third one-way bearing 133;

[0057] The rope pulley 101 is connected to the main shaft 141 through a first one-way bearing 131;

[0058] The first detection mechanism body 111 is fixed to the side surface of the rope pulley 101 and rotates synchronously with the rope pulley 101;

[0059] The second detection mechanism body 112 is fixed to the main shaft 141 and rotates synchronously with the main shaft 141;

[0060] The locking directions of the first one-way bearing 131, the second one-way bearing 132, and the third one-way bearing 133 are opposite;

[0061] When the first detection mechanism body 111 detects that the rotation speed of the rope pulley 101 is greater than the first angular velocity set value, the first pawl 113 triggers the first safety switch;

[0062] When the second detection mechanism body 112 detects that the rotation speed of the main shaft 141 is greater than the second angular velocity set value, the second pawl 114 triggers the second safety switch.

[0063] A one-way bearing can rotate freely in one direction (at this time, torque is not transmitted), and is locked in the opposite direction (at this time, torque can be transmitted).

[0064] For the elevator speed limiter of the first embodiment, its main transmission structure has 2 sets of independent speed detection mechanism bodies and 3 one-way bearings; the elevator speed limiter uses one-way bearings, which runs more smoothly compared with ratchet-type one-way clutches; and the main shaft 141 only rotates when going up or down, reducing the running noise. For the elevator speed limiter of the first embodiment, the structure of the first detection mechanism body 111 is integrated into the side surface of the rope pulley 101, reducing the installation size in the axial direction and can be used for a more compact elevator machine room layout.

[0065] Embodiment 2

[0066] Based on the first embodiment, the elevator speed limiter further includes a ratchet wheel 20 and a third pawl 115;

[0067] The ratchet wheel 20 is sleeved on the main shaft 141 and can rotate around the main shaft, and is located on the side close to the axis of the third pawl 115;

[0068] The third pawl 115 is fixed to the main shaft 141 and rotates synchronously with the main shaft 141;

[0069] When the second detection mechanism body 112 detects that the rotation speed of the main shaft 141 is greater than the third angular velocity set value, the third pawl 115 opens and catches the periphery of the ratchet wheel 20 to drive the ratchet wheel 20 to rotate synchronously;

[0070] The third angular velocity set value is greater than the second angular velocity set value.

[0071] Embodiment 3

[0072] Based on the elevator speed limiter of Embodiment 2, when the rope pulley 101 rotates counterclockwise, the first one-way bearing 131 locks, causing the main shaft 141 to rotate with the rope pulley 101, and at the same time driving the second detection mechanism body 112 to rotate synchronously with the main shaft 141;

[0073] When the rope pulley 101 rotates clockwise, the first one-way bearing 131 rotates freely in the same direction as the rope pulley 101, and the second one-way bearing 132 and the third one-way bearing 133 lock, and the main shaft 141 does not rotate with the rope pulley 101 and remains stationary.

[0074] Preferably, when the car ascends, the rope pulley 101 rotates clockwise, the first one-way bearing 131 rotates freely in the same direction as the rope pulley 101, and the second one-way bearing 132 and the third one-way bearing 133 lock; when the first detection mechanism body 111 detects that the rotation speed of the rope pulley 101 is greater than the first angular velocity set value, the first pawl 113 triggers the first safety switch, thereby triggering the car upward protection device of the elevator;

[0075] When the car descends, the rope pulley 101 rotates counterclockwise, the first one-way bearing 131 locks, causing the main shaft 141 to rotate with the rope pulley 101, and at the same time driving the second detection mechanism body 112 to rotate synchronously with the main shaft 141; when the second detection mechanism body 112 detects that the rotation speed of the main shaft 141 is greater than the second angular velocity set value, the second pawl 114 triggers the second safety switch, thereby causing the elevator brake to act; when the second detection mechanism body 112 detects that the rotation speed of the main shaft 141 is greater than the third angular velocity set value, and the third pawl 115 opens and catches the periphery of the ratchet wheel 20 to drive the ratchet wheel 20 to rotate synchronously, and the rotation of the ratchet wheel 20 triggers the safety tongs of the elevator;

[0076] The speed limiter steel wire rope bypasses the groove of the rope pulley 101, and both ends of the speed limiter steel wire rope are connected to the car and the counterweight respectively. When the car moves up and down, the rope pulley 101 is driven to rotate by the speed limiter steel wire rope.

[0077] Preferably, the rotation of the ratchet wheel 20 triggers a convex platform 116, thereby pushing the trigger rod 121, and further triggering the safety tongs of the elevator subsequently.

[0078] Preferably, the first angular velocity set value is greater than the second angular velocity set value.

[0079] Preferably, both ends of the main shaft 141 are supported by the second one-way bearing 132 and the third one-way bearing 133.

[0080] Preferably, the one-way bearing adopts a wedge type design.

[0081] Preferably, the first detection mechanism body 111 is integrally formed with the rope sheave 101 in structure and rotates synchronously with the rope sheave 101.

[0082] For the elevator overspeed governor of the third embodiment, the first detection mechanism body 111 rotates synchronously with the rope sheave 101 and is used to trigger the car upward protection device of the elevator when the car runs upward overspeed; the second detection mechanism body 112 is used to trigger the elevator brake to act when the car runs downward overspeed, and further trigger the safety gear to act when the speed is higher.

[0083] Embodiment Four

[0084] Based on the elevator overspeed governor of the first embodiment, the second detection mechanism body 112 is connected to the auxiliary shaft by a one-way coupling, and the auxiliary shaft is connected to the main shaft by a one-way coupling, so that the second detection mechanism body 112 is fixed to the main shaft 141 and rotates synchronously with the main shaft 141.

[0085] Embodiment Five

[0086] Based on the elevator overspeed governor of the first embodiment, the first detection mechanism body 111 includes a first crank 31, a second crank 32, a first connecting rod 33, a second connecting rod 34, a first stop piece 35, a first limiting piece 36, a first speed regulating spiral spring 37, a first weight 38, a first crankshaft 39, a second crankshaft, a first actuating member 40, a first tension spring 41, and a first ratchet 113;

[0087] The middle parts of the first crank 31 and the second crank 32 are pivotally fixed to the same side of the rope sheave 101 through the first crankshaft 39 and the second crankshaft which are symmetric about the main shaft 141 respectively;

[0088] Both ends of the first connecting rod 33 are respectively connected to the left end of the first crank 31 and the left part of the second crank 32;

[0089] Both ends of the second connecting rod 34 are respectively connected to the right part of the first crank 31 and the right end of the second crank 32;

[0090] The first crank 31, the second crank 32, the first connecting rod 33, the second connecting rod 34, the first crankshaft 39, and the second crankshaft together form a parallelogram linkage mechanism;

[0091] The first weight 38 is connected to the right end of the first crank 31;

[0092] The first limiting piece 36 is fixed to the upper part of the first connecting rod 33;

[0093] The middle part of the first connecting rod 33 passes through the middle through hole of the first stop piece 35;

[0094] The first stop piece 35 is fixed to the rope sheave 101;

[0095] The first speed-regulating spiral spring 37 is sleeved outside the first connecting rod 33, and its two ends respectively abut against the first limiting piece 36 and the first retaining piece 35;

[0096] The middle part of the first pawl 113 is pivotally fixed to the rope pulley 101, and its end is connected to the rope pulley 101 through the first tension spring 41;

[0097] The middle part of the first actuating member 40 is pivotally fixed to the first crank 31;

[0098] For the first actuating member 40, the tail is connected to the rope pulley 101 through an actuating tension spring, and the head locks the first pawl 113 in the initial position through a pin;

[0099] When the first pawl 113 is locked in the initial position, the first tension spring 41 is in a stretched state.

[0100] Preferably, a first limiting piece 36 is fixed to the upper part of the first connecting rod 33 by threading. The fixing position of the first limiting piece 36 on the upper part of the first connecting rod 33 can be adjusted by rotating the first limiting piece 36, the pre-compression amount of the first speed-regulating spiral spring 37 is changed, and the zero angular velocity value and the first angular velocity setting value are correspondingly adjusted.

[0101] For the elevator speed limiter of the fifth embodiment, the first crank 31, the second crank 32, the first connecting rod 33, the second connecting rod 34 of the first detection mechanism body 111 and the first crankshaft 39 and the second crankshaft together form a parallelogram link mechanism, and this parallelogram link mechanism is connected to one side of the rope pulley 101 through the first crankshaft 39 and the second crankshaft; when the rotational speed of the rope pulley 101 is greater than the zero angular velocity value (the zero angular velocity value is less than the first angular velocity setting value) during the up and down movement of the elevator, the parallelogram link mechanism rotates counterclockwise relative to the rope pulley 101 against the resistance of the first speed-regulating spiral spring 37; when the rotational speed of the rope pulley 101 is greater than the first angular velocity setting value, the first crank 31 contacts the jacking bolt 408 at the tail end of the first actuating member 40, thereby triggering the first actuating member 40 to rotate counterclockwise around the first crankshaft 39; after the first crankshaft 39 rotates counterclockwise around the first crankshaft 39, the pin at the head of the first actuating member 40 is disengaged from the first pawl 113, and the first pawl 113 rapidly rotates counterclockwise under the contraction action of the first tension spring 41, thereby triggering the first safety switch.

[0102] The above are only the preferred embodiments of the present invention, and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An elevator overspeed governor, characterized in that, It includes: A main shaft (141), supported by a second one-way bearing (132) and a third one-way bearing (133); A rope pulley (101), connected to the main shaft (141) through a first one-way bearing (131); A first detection mechanism body (111), fixed to the side surface of the rope pulley (101) and rotating synchronously with the rope pulley (101); A second detection mechanism body (112), fixed to the main shaft (141) and rotating synchronously with the main shaft (141); The locking directions of the first one-way bearing (131), the second one-way bearing (132), and the third one-way bearing (133) are opposite; When the first detection mechanism body (111) detects that the rotation speed of the rope pulley (101) is greater than the first angular velocity set value, the first pawl (113) of the first detection mechanism body (111) triggers the first safety switch; When the second detection mechanism body (112) detects that the rotation speed of the main shaft (141) is greater than the second angular velocity set value, the second pawl (114) of the second detection mechanism body (112) triggers the second safety switch.

2. The elevator speed limiter according to claim 1, wherein The elevator speed limiter further includes a ratchet wheel (20) and a third pawl (115); The ratchet wheel (20) is sleeved on the main shaft (141) and can rotate around the main shaft, and is located on the near-axis side of the third pawl (115); The third pawl (115) is fixed to the main shaft (141) and rotates synchronously with the main shaft (141); When the second detection mechanism body (112) detects that the rotation speed of the main shaft (141) is greater than the third angular velocity set value, the third pawl (115) opens and catches into the periphery of the ratchet wheel (20) to drive the ratchet wheel (20) to rotate synchronously; The third angular velocity set value is greater than the second angular velocity set value.

3. The elevator speed limiter according to claim 2, wherein When the rope pulley (101) rotates counterclockwise, the first one-way bearing (131) locks, causing the main shaft (141) to rotate with the rope pulley (101), and at the same time driving the second detection mechanism body (112) to rotate synchronously with the main shaft (141); When the rope pulley (101) rotates clockwise, the first one-way bearing (131) rotates freely in the same direction as the rope pulley (101), and the second one-way bearing (132) and the third one-way bearing (133) lock, and the main shaft (141) does not rotate with the rope pulley (101) and remains stationary.

4. The elevator speed limiter according to claim 3, wherein When the car ascends, the rope pulley (101) rotates clockwise, the first one-way bearing (131) rotates freely in the same direction as the rope pulley (101), and the second one-way bearing (132) and the third one-way bearing (133) lock; when the first detection mechanism body (111) detects that the rotation speed of the rope pulley (101) is greater than the first angular velocity set value, the first pawl (113) triggers the first safety switch, thereby triggering the upward protection device of the elevator car; When the car descends, the rope pulley (101) rotates counterclockwise, the first one-way bearing (131) locks, and the main shaft (141) rotates with the rope pulley (101). At the same time, the second detection mechanism body (112) rotates synchronously with the main shaft (141). When the second detection mechanism body (112) detects that the rotation speed of the main shaft (141) is greater than the second angular velocity set value, the second pawl (114) triggers the second safety switch, thereby causing the elevator brake to act. When the second detection mechanism body (112) detects that the rotation speed of the main shaft (141) is greater than the third angular velocity set value, the third pawl (115) opens and engages with the periphery of the ratchet wheel (20) to drive the ratchet wheel (20) to rotate synchronously, and the rotation of the ratchet wheel (20) triggers the safety clamp of the elevator.

5. The elevator speed limiter according to claim 4, characterized in that The rotation of the ratchet wheel (20) triggers a boss (116), thereby pushing the trigger rod (121), and further triggering the safety clamp of the elevator subsequently.

6. The elevator speed limiter according to claim 4, characterized in that The first angular velocity set value is greater than the second angular velocity set value.

7. The elevator speed limiter according to claim 1, characterized in that Both ends of the main shaft (141) are supported by a second one-way bearing (132) and a third one-way bearing (133).

8. The elevator speed limiter according to claim 1, characterized in that The one-way bearing adopts a wedge block design.

9. The elevator speed limiter according to claim 1, characterized in that The first detection mechanism body (111) is integrally formed with the rope pulley (101) in structure and rotates synchronously with the rope pulley (101).

10. The elevator speed limiter according to claim 1, characterized in that The speed limiter wire rope bypasses the groove of the rope pulley (101), and both ends of the speed limiter wire rope are respectively connected to the car and the counterweight. When the car moves up and down, the rope pulley (101) is driven to rotate by the speed limiter wire rope.

11. The elevator speed limiter according to claim 1, characterized in that The second detection mechanism body (112) is connected to the auxiliary shaft by a one-way coupling, and the auxiliary shaft is connected to the main shaft by a one-way coupling, so that the second detection mechanism body (112) is fixed to the main shaft (141) and rotates synchronously with the main shaft (141).

12. The elevator speed limiter according to claim 1, characterized in that The first detection mechanism body (111) includes a first crank (31), a second crank (32), a first connecting rod (33), a second connecting rod (34), a first stop piece (35), a first limit piece (36), a first speed regulating spiral spring (37), a first weight (38), a first crank shaft (39), a second crank shaft, a first actuating piece (40), a first tension spring (41), and a first pawl (113); The first crank (31) and the second crank (32) are pivotally fixed to the same side of the rope pulley (101) through the first crank shaft (39) and the second crank shaft which are symmetric about the main shaft (141) respectively; Both ends of the first connecting rod (33) are respectively connected to the left end of the first crank (31) and the left part of the second crank (32); The two ends of the second connecting rod (34) are respectively connected to the right part of the first crank (31) and the right end of the second crank (32). The first crank (31), the second crank (32), the first connecting rod (33), the second connecting rod (34), the first crankshaft (39), and the second crankshaft together form a parallelogram connecting rod mechanism. The first weight (38) is connected to the right end of the first crank (31). A first limit piece (36) is fixed to the upper part of the first connecting rod (33). The middle part of the first connecting rod (33) passes through the middle through hole of the first retaining piece (35). The first retaining piece (35) is fixed to the rope pulley (101). The first speed regulating spiral spring (37) is sleeved outside the first connecting rod (33), and its two ends respectively abut against the first limit piece (36) and the first retaining piece (35). The middle part of the first pawl (113) is pivotally fixed to the rope pulley (101), and its end is connected to the rope pulley (101) through the first tension spring (41). The middle part of the first actuating member (40) is pivotally fixed to the first crank (31). For the first actuating member (40), the tail is connected to the rope pulley (101) through an actuating tension spring, and the head locks the first pawl (113) in the initial position through a pin. When the first pawl (113) is locked in the initial position, the first tension spring (41) is in a stretched state.

13. The elevator speed limiter according to claim 12, wherein The first limit piece (36) is fixed to the upper part of the first connecting rod (33) by threading.

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