Remote reset elevator speed limiter

Abstract

This invention relates to a remotely reset elevator speed governor. The elevator speed governor includes a speed governor support plate, a pulley fixed to the support plate via a main shaft, a centrifugal mechanism mounted on the pulley and moving with it, a rotatable switch plate mounted on the support plate, and a switch mechanism linked to the switch plate. The switch plate is fixedly connected to a reset rod. A limit plate is fixed to the support plate, and a limit hole is provided on the limit plate. The reset rod passes through the limit hole and can rotate around it. A long, narrow groove is formed along the lower part of the reset rod, and a steel wire rope is vertically threaded through the groove. The steel wire rope drives the switch plate to rotate and reset under the drive of a rotary motor. This invention has a simple overall structure, accurate reset, and precise switch plate repositioning, ensuring reliable reset of the elevator speed governor when the electrical switch needs to be reset.

Description

Technical Field

[0001] The invention relates to an elevator safety component, in particular to the field of elevator speed limiters, and in particular to a remote reset elevator speed limiter. Background Art

[0002] Elevators are widely used in people's daily lives. In order to ensure people's safety and prevent elevators from overspeeding and causing harm to people, elevator speed limiters are used in elevators as safety components to monitor elevator overspeeding. When the elevator has an overspeeding fault or tests the elevator linkage function, the speed limiter completes the triggering action. When the speed limiter needs to be reset, for the machine room-less speed limiter, the maintenance personnel need to remotely reset the speed limiter. In addition to resetting the mechanical part of the speed limiter, the electrical switch of the speed limiter also needs to be remotely reset. The existing mechanism for resetting the electrical switch is mostly to drive the connecting rod to rotate through a motor, and then drive the switch connected to the connecting rod to return to its original position. The structure of the connecting rod reset will cause the elevator speed limiter to be larger in size, and the connecting rod is prone to jamming and other faults. Summary of the invention

[0003] The object of the present invention is to provide a remote reset elevator speed limiter, which has a simple overall structure, accurate reset and precise switch return, and can ensure the safe and stable operation of the elevator speed limiter.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] The present invention provides a remote reset elevator speed limiter, which comprises a speed limiter support plate, a rope pulley fixed on the speed limiter support plate through a main shaft, a centrifugal mechanism arranged on the rope pulley and moving with the rope pulley, a switch plate rotatably arranged on the speed limiter support plate, and a switch mechanism linked with the switch plate, wherein the switch plate is fixedly connected to a reset rod, a limit plate is fixed in the elevator speed limiter, a limit hole is arranged on the limit plate, the reset rod passes through the limit hole and can rotate around the limit hole, a long strip through groove is opened on the reset rod along the length of the lower part of the reset rod, a steel wire rope is vertically passed through the through groove, and the steel wire rope drives the switch plate to rotate and reset under the drive of a rotating motor.

[0006] For the above technical solution, the applicant has further optimization implementation measures.

[0007] Optionally, one end of the wire rope is fixedly connected to a limit plate or a speed limiter bracket plate, and the other end is connected to a power output end of a rotating motor. The switch plate has two working states: a trigger state and a standby state. The rotating motor is used to drive the wire rope to tighten to achieve switching of the working state of the switch plate.

[0008] Optionally, the elevator speed limiter further comprises a motor seat, and the rotating motor is fixed to the speed limiter bracket plate via the motor seat.

[0009] Furthermore, a rotating seat is rotatably provided in the motor seat, a power output end of the rotating motor is connected to the rotating seat, and the other end of the steel wire rope is fixedly connected to the rotating seat.

[0010] Furthermore, a torsion spring providing radial torsion is arranged at the rotating seat.

[0011] Optionally, the lower portion of the reset rod is sleeved in a sleeve, the reset rod and the sleeve are fixed by bolts, the elongated through slot is opened on the side of the sleeve, and the through slot is arranged along the axial direction of the sleeve.

[0012] Optionally, the limiting plate is fixedly connected to the speed limiter support plate or the fixing plate of the switch mechanism.

[0013] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0014] The elevator speed limiter of the present invention drives the switch plate to reset by rotating the motor to drive the wire rope, and can accurately correct the reset rod so that the reset rod can quickly and accurately return to the original position. The structure is simple but effective and accurate, which effectively ensures the accurate action of the elevator speed limiter and can improve the working safety and stability of the elevator speed limiter. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0016] Figure 1 1 is a schematic diagram of the overall structure of a remote reset elevator speed governor according to an embodiment of the present invention;

[0017] Figure 2 It is a structural schematic diagram of a remote reset elevator speed governor according to an embodiment of the present invention, in a state where the side plate of the speed governor bracket plate is removed;

[0018] Figure 3 for Figure 2 A partial enlarged view of the remote reset elevator speed limiter is shown.

[0019] The reference numerals are described as follows:

[0020] 1. Speed ​​governor bracket plate, 2. Main shaft, 3. Pulley, 4. Centrifugal mechanism,

[0021] 5. Switch plate, 51. Tip, 52. Contact hidden nest,

[0022] 6. Switch mechanism, 61. Contacts,

[0023] 7. Reset rod, 71. Through slot, 72. Sleeve, 73. Bolt

[0024] 8. Limit plate, 81. Limit hole,

[0025] 9. Wire rope,

[0026] 10. Rotating motor, 11. Motor seat, 12. Rotating seat. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] This embodiment provides a remote reset elevator speed limiter, such as Figures 1 to 3As shown, the elevator speed limiter includes a speed limiter bracket plate 1, a sheave 3 fixed to the speed limiter bracket plate 1 through a main shaft 2, a centrifugal mechanism 4 arranged on the sheave 3 and moving with the sheave 3, a switch plate 5 rotatably arranged at the speed limiter bracket plate 1, and a switch mechanism 6 linked to the switch plate 5. The switch plate 5 is fixedly connected to a reset rod 7. A limit plate 8 is fixed on the elevator speed limiter. The limit plate 8 can be directly fixedly connected to the speed limiter bracket plate 1, or it can be fixedly connected to the housing (fixed plate) of the switch mechanism first and then fixed to the speed limiter bracket plate 1, so that the limit plate 8 can be effectively fixed and the reset rod 7 can rotate around the limit hole 81 on the limit plate 8. A limiting hole 81 is provided on the limiting plate 8, and the reset rod 7 passes through the limiting hole 81 and can rotate around the limiting hole 81. A long strip through groove 71 is opened on the reset rod 7 along its length at the lower part of the reset rod 7, and a steel wire rope 9 is vertically passed through the through groove 71. The diameter of the steel wire rope 9 is slightly smaller than the width of the through groove 71. The steel wire rope 9 drives the switch plate 5 to rotate and reset under the drive of the rotating motor 10.

[0031] The switch plate 5 is arranged at the top of the speed limiter bracket plate 1, and the end facing the rope sheave 3 is a pointed end 51, and the other end is in contact with the switch contact 61 of the switch mechanism 6. A contact hidden nest 52 is arranged at the position in contact with the switch contact 61 at the other end of the switch plate 5. This contact hidden nest 52 is in the shape of a conical groove as a whole. In the initial state of the elevator speed limiter, the switch contact 61 is in a pop-up state, and the switch contact 61 is arranged in the contact hidden nest 52. When the elevator stalls, the rope sheave 3 rotates at an overspeed and the centrifugal mechanism 4 is thrown out. At this time, the centrifugal mechanism 4 in the rotating state is bound to touch the switch plate 5, causing the switch plate 5 to rotate. It can be understood that no matter whether the switch plate 5 rotates clockwise or counterclockwise, as long as the contact hidden nest 52 slides out of the position of the switch contact 61, the switch contact 61 will be pressed down, thereby disconnecting the switch in the switch mechanism 6 and disconnecting the electrical circuit of the elevator speed limiter.

[0032] It is understandable that when the switch plate 5 is triggered to rotate, the reset rod 7 is driven to rotate together, and the wire rope 9 is stuck in the through slot 71 at the lower part of the reset rod 7, and the wire rope 9 is also driven to twist. After the elevator returns to normal, the switch plate 5 needs to be reset. At this time, it is only necessary to start the rotating motor 10. The rotating motor 10 rotates in the opposite direction relative to the previous twisting direction of the wire rope 9, driving the wire rope 9 to restore the tension state again, which will inevitably drive the reset rod 7 to rotate until it returns to the original position, and the switch plate 5 fixedly connected to the reset rod 7 can be restored to the original position.

[0033] The elevator speed limiter of this embodiment drives the switch plate 5 to reset by rotating the motor 10 to drive the wire rope 9, and can accurately correct the reset rod 7 so that the reset rod 7 can quickly and accurately return to its original position. The structure is simple but effective and accurate, which effectively ensures the accurate action of the elevator speed limiter and can improve the working safety and stability of the elevator speed limiter.

[0034] As for the specific setting of the steel wire rope 9, one end of the steel wire rope 9 is fixedly connected to the limit plate 8 or the speed limiter bracket plate 1, and the other end is connected to the power output end of a rotating motor 10. The switch plate 5 has two working states: a trigger state and a standby state. In the trigger state, the switch plate 5 deviates from the original position and the steel wire rope 9 is in a twisted state. The standby state is the state when the switch plate 5 is in the original position and the steel wire rope 9 is in a taut state. The rotating motor 10 is used to drive the steel wire rope 9 to be taut or not, thereby realizing the switching and resetting of the switch plate 5 between the two working states.

[0035] In a further embodiment, the elevator speed limiter further comprises a motor seat 11, and the rotating motor 10 is fixed to the speed limiter bracket plate 1 through the motor seat 11. A rotating seat 12 is rotatably provided in the motor seat 11, and the power output end of the rotating motor 10 is connected to the rotating seat 12, and the other end of the steel wire rope 9 is fixedly connected to the rotating seat 12, and a torsion spring providing radial torsion is provided at the rotating seat 12, and the torsion spring makes the steel wire rope 9 in a taut state in the standby state.

[0036] In another embodiment, the lower part of the reset rod 7 is sleeved in a sleeve 72, the reset rod 7 and the sleeve 72 are locked and fixed by bolts 73, the long strip through slot 71 is opened on the side of the sleeve 72, and the through slot 71 is arranged along the axial direction of the sleeve 72. The design between the reset rod 7 and the sleeve 72 can make the upper and lower positions of the sleeve 72 and the reset rod 7 (switch plate 5) adjustable, and when the position of the centrifugal mechanism 4 is adjusted, the position of the switch plate 5 can be adjusted adaptively. Similarly, the position of the through slot 71 in the vertical direction can be adjusted to adapt to the position of the wire rope 9.

[0037] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A remote reset elevator speed limiter, comprising a speed limiter support plate, a sheave fixed to the speed limiter support plate through a main shaft, a centrifugal mechanism arranged on the sheave and moving with the sheave, a switch plate rotatably arranged at the speed limiter support plate, and a switch mechanism linked to the switch plate, characterized in that: The switch plate is fixedly connected with a reset rod, a limit plate is fixed in the elevator speed limiter, a limit hole is arranged on the limit plate, the reset rod passes through the limit hole and can rotate around the limit hole, a long strip through slot is opened on the reset rod along its length at the lower part of the reset rod, a steel wire rope is vertically passed through the through slot, and the steel wire rope drives the switch plate to rotate and reset under the drive of the rotating motor; One end of the steel wire rope is fixedly connected to a limit plate or a speed limiter bracket plate, and the other end is connected to a power output end of a rotating motor. The switch plate has two working states: a trigger state and a standby state. The rotating motor is used to drive the steel wire rope to tighten to achieve switching of the working state of the switch plate.

2. The remote reset elevator speed governor according to claim 1, characterized in that: It also includes a motor seat, through which the rotating motor is fixed to the speed limiter bracket plate.

3. The remote reset elevator speed governor according to claim 2, characterized in that: A rotating seat is rotatably arranged in the motor seat, a power output end of the rotating motor is connected to the rotating seat, and the other end of the steel wire rope is fixedly connected to the rotating seat.

4. The remote reset elevator speed governor according to claim 3, characterized in that: The rotating seat is provided with a torsion spring which provides radial torsion force.

5. The remote reset elevator speed governor according to claim 1, characterized in that: The lower part of the reset rod is sleeved in a sleeve, and the reset rod and the sleeve are fixed by bolts. The long strip through groove is opened on the side of the sleeve, and the through groove is arranged along the axial direction of the sleeve.

6. The remote reset elevator speed governor according to claim 1, characterized in that: The limiting plate is fixedly connected to the speed limiter support plate or the fixing plate of the switch mechanism.

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