Electronic speed limiter and elevator

Abstract

The present invention belongs to the technical field of elevator components, and specifically relates to an electronic speed governor and an elevator, wherein the electronic speed governor includes a base and a wheel shaft mounted on the base, an electrical trigger, a linkage mechanism and a brake member, the wheel shaft rotates in conjunction with the base, a rope pulley is coaxially mounted on the wheel shaft, a friction wheel is provided on the rope pulley, the wheel shaft, rope pulley and friction wheel rotate synchronously, the electrical trigger member is driven and connected to the linkage mechanism, and the linkage mechanism is driven and connected to the brake member; when the rotation speed of the rope pulley reaches the target rotation speed, the electrical detection and trigger member is activated, driving the linkage mechanism, so as to link the brake member to move until it contacts and rubs with the friction wheel to stop the rope pulley. The electronic speed governor of the present invention adopts the triggering action of electronic detection and electrical trigger member to realize electronic detection and triggering, and utilizes the electronic triggering to drive the linkage mechanism, thereby realizing the braking action of the brake member, and the action is sensitive, and it can detect low speed and trigger, thereby solving the defects of the triggering of the mechanical speed governor.

Description

Technical Field

[0001] The present invention belongs to the technical field of elevator components, and in particular relates to an electronic speed governor and an elevator. Background Art

[0002] The function of the elevator speed limiter is to detect the car losing speed through the speed limiter and trigger the linkage safety clamp to stop the car.

[0003] At present, mechanical speed limiters are widely used in the market, but they have the following disadvantages: first, the action speed is not accurate and can only be operated within a certain speed range, and cannot be triggered at low speeds; second, the action speed is prone to change over time and requires regular inspection, otherwise the detection and action are unreliable; third, there is a certain lag in mechanical detection and triggering. Summary of the Invention

[0004] Based on the above-mentioned shortcomings and deficiencies in the prior art, one of the objects of the present invention is to at least solve one or more of the above-mentioned problems in the prior art. In other words, one of the objects of the present invention is to provide an electronic speed governor and an elevator that meet one or more of the above-mentioned needs.

[0005] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

[0006] An electronic speed limiter includes a base and a wheel axle mounted on the base, an electrical trigger, a linkage mechanism and a brake member. The wheel axle rotates in conjunction with the base, a rope pulley is coaxially mounted on the wheel axle, and a friction wheel is provided on the rope pulley. The wheel axle, rope pulley and friction wheel rotate synchronously, the electrical trigger member is drive-connected to the linkage mechanism, and the linkage mechanism is drive-connected to the brake member. When the rotation speed of the rope pulley reaches the target rotation speed, the electrical trigger member is actuated to drive the linkage mechanism, so that the linkage brake member moves until it contacts and rubs with the friction wheel to stop the rope pulley.

[0007] As a preferred solution, the axle is provided with a magnetic steel, and the base is provided with an encoder corresponding to the magnetic steel.

[0008] As a preferred solution, shielding covers are respectively provided at both ends of the base corresponding to the wheel axle, and the shielding covers are located outside the magnetic steel and its corresponding encoder.

[0009] As a preferred embodiment, the linkage mechanism includes a first linkage arm, a first rotating shaft, a second rotating shaft, a second linkage arm, a third rotating shaft, a third linkage arm and a fourth rotating shaft, wherein the first end of the first linkage arm is hinged to the base through the first rotating shaft, the second end of the first linkage arm and the first end of the second linkage arm are hinged through the second rotating shaft, and the base has a movable groove for the second rotating shaft; the second end of the second linkage arm and the first end of the third linkage arm are hinged through the third rotating shaft, and the base has a guide groove for the movement of the third rotating shaft; the second end of the third linkage arm is hinged to the brake member through the fourth rotating shaft, and the brake member is hinged to the base;

[0010] The rotating surfaces of the first linking arm, the second linking arm, the third linking arm and the braking component are all parallel.

[0011] As a preferred solution, there are two third linking arms, and accordingly, the base has two guide grooves and two braking members.

[0012] As a preferred solution, the base is provided with a reset spring for resetting the brake member.

[0013] As a preferred solution, the braking member is a cam structure.

[0014] As a preferred solution, the electrical triggering component is an electromagnet.

[0015] As a preferred solution, the base is provided with a speed limiter reset detection switch.

[0016] The present invention also provides an elevator, which adopts the electronic speed governor as described in any of the above solutions.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The electronic speed limiter of the present invention adopts the triggering action of the electrical detection and triggering member to realize electronic detection and triggering, and utilizes the electronic triggering to drive the linkage mechanism, thereby realizing the braking action of the brake member. The electronic speed limiter has sensitive action and can be triggered even at a relatively low speed, thereby solving the defects of the triggering of the mechanical speed limiter. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 1 is a schematic structural diagram of an electronic speed governor according to embodiment 1 of the present invention;

[0020] Figure 2 is a schematic structural diagram of the electronic speed governor according to embodiment 1 of the present invention from another perspective;

[0021] Figure 3 yes Figure 2 AA section view in the figure;

[0022] Figure 4 1 is a schematic structural diagram of a base of an electronic speed governor according to embodiment 1 of the present invention;

[0023] Figure 5 1 is a schematic structural diagram of the linkage mechanism of the electronic speed governor according to embodiment 1 of the present invention;

[0024] Figure 6 It is a structural schematic diagram of the other side of the linkage mechanism of the electronic speed governor of Example 1 of the present invention. DETAILED DESCRIPTION

[0025] To more clearly illustrate the embodiments of the present invention, specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other embodiments can be obtained based on these drawings without inventive efforts.

[0026] Example 1:

[0027] like Figure 1-6 As shown, the electronic speed governor of this embodiment includes a base 1 and a wheel axle 2 mounted on the base 1, an electromagnet 3, a linkage mechanism, an upward braking cam 4 and a downward braking cam 5.

[0028] The base 1 includes a left stand 1-1 and a right stand 1-2 distributed at a predetermined interval. The left stand 1-1 and the right stand 1-2 are fixedly connected by a spacer I and a fixing bolt II, and an installation space is formed between the two.

[0029] In this embodiment, the axle 2 is mounted on the tops of the left and right uprights 1-1 and 1-2, respectively, via left and right bearings Z1 and Z2, enabling the axle 2 to rotate in conjunction with the base 1. A sheave 6 is coaxially mounted on the axle 2, and a friction wheel 7 is coaxially mounted on the sheave 6, ensuring synchronous rotation of the axle 2, sheave 6, and friction wheel 7. The friction wheel 7 is fixed to the sheave 6 via spacers and bolts, ensuring that the friction wheel 7 and sheave 6 are spaced apart and rotate synchronously, allowing the friction wheel 7 to engage the upward brake cam 4 or downward brake cam 5 in a braking manner. Furthermore, a top cover 0 is mounted on the base 1 to prevent foreign matter from entering the sheave and friction wheel.

[0030] In this embodiment, the axle 2 is mounted with magnets 8 on both its left and right ends. Correspondingly, encoders 9, corresponding to the magnets, are mounted on the left and right stands 1-1 and 1-2, respectively. The magnets 8 and encoders 9 form a magnetic encoder that detects the axle's rotational speed, facilitating fall detection and triggering, overspeed detection, and slippage detection and triggering via the pulley. The use of two magnetic encoders allows for calibration and redundancy, ensuring the accuracy and reliability of electronic detection and triggering. Furthermore, to prevent magnetic induction interference between the encoders and the magnets, shielding covers 10 are mounted on the left and right stands 1-1 and 1-2, corresponding to the left and right ends of the axle, respectively. Shielding covers 10 are located outside the magnets and their corresponding encoders.

[0031] In this embodiment, the electromagnet 3 is connected to the linkage mechanism, which is connected to the upward brake cam 4 and the downward brake cam 5. When the rotation speed of the rope pulley 6 reaches the target rotation speed, the electromagnet 3 is activated to drive the linkage mechanism, so as to link the upward brake cam 4 or the downward brake cam 5 to move to contact and rub with the friction wheel 7, thereby stopping the rope pulley 6. The linkage mechanism includes a first linkage arm 11, a first rotating shaft 12, a second rotating shaft 13, a second linkage arm 14, a third rotating shaft 15, an upward linkage arm 16, a downward linkage arm 17, an upward rotating shaft 18 and a downward rotating shaft 19. The first end of the first linkage arm 11 is hinged to the right stand of the base through the first rotating shaft 12, and the second end of the first linkage arm 11 and the first end of the second linkage arm 14 are hinged through the second rotating shaft 13. The right stand of the base has a movable groove L for the second rotating shaft 13 to avoid the movable space of the second rotating shaft. The second linkage arm 14 The second end of the upper linkage arm 16, the first end of the lower linkage arm 17 are hingedly connected via a third rotating shaft 15. The right vertical seat of the base has an upper guide groove K1 and a lower guide groove K2 for the third rotating shaft 15 to move. The upper guide groove K1 and the lower guide groove K2 are symmetrically distributed. The second end of the upper linkage arm 16 is hingedly connected to the upper brake cam 4 via an upper rotating shaft 18, and the second end of the lower linkage arm 17 is hingedly connected to the lower brake cam 5 via a lower rotating shaft 19. The upper brake cam 4 and the lower brake cam 5 are respectively hingedly connected to the right vertical seat of the base. The rotation surfaces of the first linkage arm 11, the second linkage arm 14, the upper linkage arm 16, the lower linkage arm 17, the upper brake cam 4, and the lower brake cam 5 are all parallel.

[0032] In addition, the right upright seat of the base in this embodiment is respectively equipped with a return spring 20 for resetting the upward braking cam 4 and the downward braking cam, and a limit pin 21 for limiting the resetting stroke.

[0033] The right stand of the base of this embodiment is also provided with a speed limiter reset detection switch 22 for detecting whether the electromagnet 3 is reset, thereby determining whether the speed limiter is reset.

[0034] This embodiment also provides an elevator, which adopts the electronic speed governor of this embodiment, has better reliability and ensures the safety of the elevator car.

[0035] Example 2:

[0036] The electronic speed governor of this embodiment differs from that of embodiment 1 in that:

[0037] The brake cam can be replaced by other common structures, such as an eccentric irregular wheel body, as long as it can achieve friction braking in contact with the friction wheel;

[0038] For other structures, please refer to Example 1;

[0039] The elevator of this embodiment adopts the electronic speed governor of this embodiment.

[0040] Example 3:

[0041] The electronic speed governor of this embodiment differs from that of embodiment 1 in that:

[0042] Only one of the upward and downward braking cams is retained, and the corresponding linkage mechanism is structurally adjusted to achieve one-way triggering to meet the needs of different applications;

[0043] For other structures, please refer to Example 1;

[0044] The elevator of this embodiment adopts the electronic speed governor of this embodiment.

[0045] It should be noted that the above embodiments can be freely combined as needed. The above description is only a detailed description of the preferred embodiments and principles of the present invention. For those skilled in the art, based on the ideas provided by the present invention, there will be changes in the specific implementation methods, and these changes should also be considered within the scope of protection of the present invention.

Claims

1. An electronic speed governor, characterized in that: The invention comprises a base and a wheel shaft mounted on the base, an electrical trigger, a linkage mechanism and a brake member. The wheel shaft rotates in conjunction with the base. A rope pulley is coaxially mounted on the wheel shaft. A friction wheel is provided on the rope pulley. The wheel shaft, rope pulley and friction wheel rotate synchronously. The electrical trigger member is driven and connected to the linkage mechanism, which is in turn driven and connected to the brake member. When the rotation speed of the rope pulley reaches the target rotation speed, the electrical trigger member is actuated to drive the linkage mechanism, so that the linkage brake member moves until it contacts and rubs against the friction wheel, thereby stopping the rope pulley. The linkage mechanism includes a first linkage arm, a first rotating shaft, a second rotating shaft, a second linkage arm, a third rotating shaft, a third linkage arm and a fourth rotating shaft, wherein the first end of the first linkage arm is hinged to the base through the first rotating shaft, the second end of the first linkage arm and the first end of the second linkage arm are hinged through the second rotating shaft, and the base has a movable groove for the second rotating shaft; the second end of the second linkage arm and the first end of the third linkage arm are hinged through the third rotating shaft, and the base has a guide groove for the movement of the third rotating shaft; the second end of the third linkage arm is hinged to the brake member through the fourth rotating shaft, and the brake member is hinged to the base; The rotating surfaces of the first linking arm, the second linking arm, the third linking arm and the braking component are all parallel.

2. The electronic speed governor according to claim 1, characterized in that: The wheel shaft is provided with a magnetic steel, and the base is provided with an encoder corresponding to the magnetic steel.

3. The electronic speed governor according to claim 2, characterized in that: The base is provided with shielding covers at both ends corresponding to the wheel axle, and the shielding covers are located outside the magnetic steel and the corresponding encoder.

4. The electronic speed governor according to any one of claims 1 to 3, characterized in that: There are two third linking arms, and correspondingly, the base has two guide grooves and two brake members.

5. The electronic speed governor according to any one of claims 1 to 3, characterized in that: The base is provided with a return spring for resetting the brake member.

6. The electronic speed governor according to any one of claims 1 to 3, characterized in that: The braking component is a cam structure.

7. The electronic speed governor according to any one of claims 1 to 3, characterized in that: The electrical triggering component is an electromagnet.

8. The electronic speed governor according to any one of claims 1 to 3, characterized in that: The base is provided with a speed limiter reset detection switch.

9. An elevator, characterized in that: An electronic speed limiter as described in any one of claims 1 to 8 is used.

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