An elevator runaway protection device

Abstract

The application discloses an elevator out-of-control and out-of-speed protection device and belongs to the technical field of elevator protection. The device comprises a fixed bottom plate, a buffer mechanism, a main buffer, a release mechanism and a control unit. The buffer mechanism comprises a supporting assembly and a compression spring. The supporting assembly is arranged on the fixed bottom plate, and the two ends of the compression spring are connected with the upper and lower sides of the supporting assembly. The main buffer is vertically arranged on the top of the supporting assembly. The release mechanism is arranged on the fixed bottom plate. The locking end of the release mechanism is buckled with the buffer mechanism and makes the compression spring in a compressed state. The control unit is arranged on the supporting assembly and is used for controlling the locking end of the release mechanism to be separated from the buffer mechanism. The buffer device can be installed at the bottom of a shaft. When the control system receives an elevator overspeed signal, the electromagnet action controller controls the hook device to be released. At this time, the buffer is instantly popped out under the action of the compression spring, so that the buffer effect on the elevator car falling at high speed or ascending at a speed out of control is achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of elevator buffer devices, and particularly relates to an elevator out-of-control and overspeed protection device. BACKGROUND

[0002] With the continuous improvement of urbanization in China, high-rise buildings are increasing, and elevators, as indispensable transportation tools for these high-rise buildings, are also increasing in the market. The concept of people-oriented elevators is becoming more and more important. Most of the car wall materials of modern elevators are metal materials. When the elevator car accidentally accelerates downward or overspeeds and hits the top, the body of the passenger in the elevator car is in hard contact with the metal, which poses a great threat to life safety.

[0003] In order to reduce the harm caused by elevator overspeed or hitting the top to passengers, a buffer is currently arranged at the bottom of the shaft, but the buffering effect of this buffer is limited. If the speed of the elevator when falling or hitting the top is too fast, it cannot provide sufficient protection for the life safety of passengers. SUMMARY

[0004] The application is proposed in view of the above problems existing in the prior art, and provides an elevator out-of-control and overspeed protection device which can respond instantaneously and improve the buffering effect.

[0005] The application can be implemented through the following technical scheme:

[0006] An elevator out-of-control and overspeed protection device comprises:

[0007] a fixed bottom plate;

[0008] a buffering mechanism comprising a support assembly and a compression spring, the support assembly is arranged on the fixed bottom plate, and the two ends of the compression spring are connected with the upper and lower sides of the support assembly;

[0009] a main buffer vertically arranged on the top of the support assembly, the main buffer and the buffering mechanism form a secondary buffering protection device;

[0010] a release mechanism arranged on the fixed bottom plate, the locking end of the release mechanism is buckled with the buffering mechanism and makes the compression spring in a compressed state;

[0011] a control unit arranged on the support assembly, the release mechanism is connected with the control unit, and the control unit is also electrically connected with an external elevator speed limiter. When the elevator speed limiter transmits an electric signal to the control unit, the control unit drives the release mechanism to deform and makes the locking end of the release mechanism disengage from the buffering mechanism. The buffering mechanism and the main buffer are instantaneously pushed upward under the action of the compression spring.

[0012] As a further improvement of the present application, the support assembly comprises:

[0013] a pre-tightening force adjusting plate;

[0014] a clamping screw vertically arranged on the fixed base plate and penetrating through the pre-tightening force adjusting plate, and the upper and lower sides of the pre-tightening force adjusting plate are connected with the clamping screw through adjusting bolts;

[0015] a buffer fixing plate mounted on the clamping screw, and the buffer fixing plate and the pre-tightening force adjusting plate are respectively close to the upper and lower ends of the clamping screw;

[0016] a spring sliding rail vertically arranged on the pre-tightening force adjusting plate, and the upper end of the spring sliding rail penetrates through the buffer fixing plate and extends upward.

[0017] As a further improvement of the present application, the compression spring is sleeved on the spring sliding rail, and the two ends of the compression spring are respectively connected with the pre-tightening force adjusting plate and the buffer fixing plate.

[0018] As a further improvement of the present application, the main buffer is vertically arranged and comprises a connecting part and a buffer part, the connecting part is connected with the buffer fixing plate, and the buffer part is telescopically connected with the connecting part.

[0019] As a further improvement of the present application, the control unit is an electromagnet, and the action controller of the electromagnet is electrically connected with an external elevator speed limiter.

[0020] As a further improvement of the present application, the release mechanism is in the form of a claw, which comprises:

[0021] a mounting seat arranged on the fixed base plate;

[0022] a first connecting part, one end of which is hinged with the mounting seat and forms a first moving point;

[0023] a claw part, the other end of which is hinged with the first connecting part and forms a second moving point;

[0024] a second connecting part, one end of which is hinged with the electromagnet and the other end is hinged with the second moving point.

[0025] As a further improvement of the present application, the end of the claw part away from the second moving point is a locking end, which is used to be buckled with the buffer fixing plate.

[0026] As a further improvement of the present application, when the claw part is buckled with the buffer fixing plate, the claw part and the first connecting part are on the same vertical axis, and the second connecting part is perpendicular to the claw part and the first connecting part.

[0027] As a further improvement of the present application, when the action controller of the electromagnet receives the signal of the elevator speed limiter, the electromagnet is attracted and drives the second connecting part to move laterally towards the direction of the compression spring, at this time the second connecting part pulls the second moving point laterally and makes the hook part disengage from the bumper fixing plate.

[0028] As a further improvement of the present application, the side of the adjusting screw is provided with a movable wedge, when the buffer mechanism is in the locked state, the position of the movable wedge is higher than the bumper fixing plate.

[0029] Compared with the prior art, the present application has the following beneficial effects:

[0030] 1. The main buffer serves as a primary buffer device, the buffer mechanism serves as a secondary buffer device, and the two are connected to form a secondary buffer device and have a secondary buffer protection effect. When the elevator loses speed and falls or hits the top, the main buffer plays a buffering role, and the buffer mechanism further improves the buffering effect, thereby providing better protection for the safety of passengers.

[0031] 2. When the buffer mechanism is in the locked state, the locking end of the release mechanism is engaged with the buffer mechanism and the compression spring is in a compressed state, at this time the whole elevator speed loss protection device is in a closed state, and there is enough distance between the main buffer and the elevator car to meet the existing standard requirements.

[0032] 3. When the elevator car accidentally loses speed and falls, the electrical overspeed switch of the elevator speed limiter acts and instantaneously transmits an electrical signal to the control unit, at this time the control unit drives the release mechanism to deform and makes the locking end disengage from the buffer mechanism, and the secondary buffer device formed by the buffer mechanism and the main buffer is instantaneously ejected under the action of the compression spring, increasing the buffering distance of the main buffer, and the addition of the secondary buffer protection device can absorb more kinetic energy of the falling elevator, providing a secondary buffering effect for the falling elevator car.

[0033] 4. The control unit is an electromagnet, the whole opening process of the secondary buffer protection device involves electrical conduction, electromagnet action and spring energy release, and these action processes can meet the instantaneous action requirement and at the same time ensure that the elevator can be sufficiently buffered and protected.

[0034] 5. An installation port can be opened on the side of the set screw for installing the movable wedge. During the process of the buffer fixing plate being pushed out, the movable wedge can be pressed into the installation port. During the process of the buffer fixing plate being pushed back, the movable wedge can limit the buffer fixing plate, causing the counterweight device to stop prematurely and the elevator car that is unexpectedly rising to stop before the set distance value, thus playing a role in early protection. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the elevator runaway and stall protection device in the released state according to Embodiment 1 of the present invention;

[0036] Figure 2 This is the invention Figure 1 A structural diagram from another perspective;

[0037] Figure 3 This is a schematic diagram of the elevator runaway and stall protection device in the locked state according to Embodiment 1 of the present invention;

[0038] Figure 4 This is a schematic diagram of the elevator runaway and stall protection device according to Embodiment 2 of the present invention;

[0039] Figure 5 This is a schematic diagram showing the positions of the car buffer provided in Embodiment 1 and the counterweight buffer provided in Embodiment 2 of the present invention.

[0040] In the diagram, 100 is the fixed base plate; 200 is the buffer mechanism; 210 is the compression spring; 220 is the preload adjusting plate; 230 is the set screw; 231 is the adjusting nut; 232 is the limit nut; 240 is the buffer fixing plate; 241 is the buffer pad; 250 is the spring slide rail; 251 is the damping bushing; 260 is the movable wedge; 300 is the main buffer; 310 is the connecting part; 320 is the buffer part; 400 is the release mechanism; 410 is the mounting base; 420 is the first connecting part; 430 is the hook part; 440 is the second connecting part; 500 is the control unit; 600 is the elevator car; and 700 is the counterweight device. Detailed Implementation

[0041] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0042] Example 1

[0043] like Figures 1-3 As shown, the present invention provides an elevator runaway and stall protection device, comprising:

[0044] A fixed base plate 100 is used for installation at the bottom of the ladder shaft;

[0045] The buffering mechanism 200 comprises a support assembly vertically arranged on the fixed base plate 100 and a compression spring 210, two ends of which are connected to the upper and lower sides of the support assembly. The compression spring 210 is arranged to enable the support assembly to be extended and retracted in the vertical direction, thereby playing a buffering role.

[0046] The main buffer 300 is vertically arranged on the top of the support assembly. It is worth mentioning that, in the embodiment, the main buffer 300 serves as a primary buffering device, and the buffering mechanism 200 serves as a secondary buffering device. The two are connected in cooperation to form a secondary buffering device and have a secondary buffering protection effect. When the elevator is out of control and falls, the buffering effect is further improved through the buffering mechanism 200 on the basis of the buffering effect of the main buffer 300, thereby providing better protection for the life safety of passengers.

[0047] The release mechanism 400 is arranged on the fixed base plate 100. The locking end of the release mechanism 400 is buckled with the buffering mechanism 200 and enables the compression spring 210 to be in a compressed state. At this time, the entire elevator out-of-control protection device is in a closed state, and there is enough distance between the main buffer 300 and the elevator car 600 to meet the existing standard requirements.

[0048] The control unit 500 is arranged on the support assembly. The release mechanism 400 is connected with the control unit 500. The control unit 500 is also electrically connected with the external elevator speed limiter. Specifically, when the elevator car 600 accidentally falls, the electrical overspeed switch of the elevator speed limiter acts and instantaneously transmits an electrical signal to the control unit 500. At this time, the control unit 500 drives the release mechanism 400 to deform and makes the locking end thereof disengage from the buffering mechanism 200. The secondary buffering device formed by the buffering mechanism 200 and the main buffer 300 is instantaneously ejected under the action of the compression spring 210, increasing the buffering distance of the main buffer 300. Meanwhile, the addition of the secondary buffering device can absorb more kinetic energy of the falling elevator, thereby playing a secondary buffering role for the falling of the elevator car 600.

[0049] It is worth mentioning that, since the elevator falls as a free fall when it is out of control, the falling speed is relatively fast. Therefore, the time interval between the elevator being out of control and the secondary buffering device being automatically opened is short. Therefore, it is necessary to ensure that the opening of the secondary buffering device is instantaneous. In the embodiment, the control unit 500 is preferably arranged as an electromagnet. The deformation of the release mechanism 400 and the disengagement of the release mechanism 400 from the buffering mechanism 200 are realized through the attraction of the electromagnet. Thus, the entire opening process of the secondary buffering protection device in the embodiment involves electrical conduction, electromagnet action, and spring energy release. These action processes can meet the requirement of instantaneous action and at the same time ensure that the elevator can be sufficiently buffered and protected.

[0050] Preferably, the support assembly comprises:

[0051] a pre-tightening force adjusting plate 220;

[0052] a clamping screw 230 vertically arranged on the fixed base plate 100 and penetrating the pre-tightening force adjusting plate 220, and the upper and lower sides of the pre-tightening force adjusting plate 220 are connected with the clamping screw 230 through adjusting nuts 231, and the position of the pre-tightening force adjusting plate 220 on the clamping screw 230 is adjusted by rotating the adjusting nuts 231;

[0053] a buffer fixing plate 240 mounted on the clamping screw 230, and the buffer fixing plate 240 is close to the upper and lower ends of the clamping screw 230, respectively, with the pre-tightening force adjusting plate 220;

[0054] a spring sliding rail 250 vertically arranged on the pre-tightening force adjusting plate 220, and the upper end of the spring sliding rail 250 penetrates the buffer fixing plate 240 and extends upward, wherein a damping reduction bushing 251 is arranged between the spring sliding rail 250 and the buffer fixing plate 240, and the compression spring 210 is sleeved on the spring sliding rail 250, and the two ends of the compression spring 210 are connected with the pre-tightening force adjusting plate 220 and the buffer fixing plate 240, respectively, so that the compression amount of the compression spring 210 can be controlled by adjusting the up and down position of the pre-tightening force adjusting plate 220;

[0055] Specifically, when the buffer mechanism 200 is in the locked state, the compression spring 210 is always in the compressed state, and when the buffer mechanism 200 is opened, the compression spring 210 will instantaneously push the buffer fixing plate 240 out.

[0056] Preferably, the main buffer 300 is vertically arranged and comprises a connecting part 310 and a buffer part 320, the connecting part 310 is connected with the buffer fixing plate 240, and the buffer part 320 is telescopically connected with the connecting part 310, when the elevator car 600 contacts with the main buffer 300 due to the overspeed, the buffer part 320 is pressed downward to play a primary buffering role, and at the same time, the main buffer 300 plays a primary buffering role, the buffer fixing plate 240 is pressed downward to compress the compression spring 210 and play a secondary buffering role, thereby greatly improving the buffering effect on the overspeed elevator.

[0057] Preferably, the upper end of the clamping screw 230 is further provided with a limiting nut 232, when the compression spring 210 pushes the buffer fixing plate 240 out, the buffer fixing plate 240 is limited by the limiting nut 232, and the upper top surface of the buffer fixing plate 240 is further provided with a buffer pad 241, the buffer pad 241 is also sleeved on the clamping screw 230, and the buffer pad 241 plays a buffering role on the buffer fixing plate 240 when the buffer fixing plate 240 is pushed out.

[0058] Preferably, the release mechanism 400 is configured in a claw shape, and includes:

[0059] Mounting base 410 is mounted on fixed base plate 100;

[0060] The first connecting part 420 has one end hinged to the mounting base 410 and forms a first movable point;

[0061] The hook portion 430 is hinged to the other end of the first connecting portion 420 to form a second movable point. The end of the hook portion 430 away from the second movable point is a locking end and is used to engage with the buffer fixing plate 240.

[0062] The second connecting part 440 is hinged at one end to the electromagnet and at the other end to the second movable point. Thus, when the electromagnet is attracted, the electromagnet pulls the second connecting part 440 inward. At this time, the second connecting part 440 can pull the second movable point of the first connecting part 420 and the hook part 430 inward, thereby causing the locking end of the hook part 430 to flip outward and disengage from the buffer fixing plate 240.

[0063] Preferably, in this embodiment, when the release mechanism 400 is in the locked state, the hook portion 430 is engaged with the buffer fixing plate 240. At this time, the hook portion 430 and the first connecting portion 420 are on the same vertical axis, and the second connecting portion 440 is perpendicular to the hook portion 430 and the first connecting portion 440.

[0064] When the electromagnet's motion controller receives the electrical signal from the elevator speed limiter, the electromagnet instantly attracts and causes the hook 430 to disengage from the buffer fixing plate 240. At this time, the release mechanism 400 is in the open state, and the buffer fixing plate 240 is instantly ejected under the action of the compression spring 210, which simultaneously drives the main buffer 300 to be pushed out instantly.

[0065] In addition, to improve the connection between the hook portion 430 and the buffer fixing plate 240 in the locked state, the contact surface of the locking end of the hook portion 430 is set as a toothed surface to increase the friction between the hook portion 430 and the buffer fixing plate 240, ensuring that the hook portion 430 can always remain locked with the buffer fixing plate 240 when the electromagnet does not receive the elevator stall signal.

[0066] Example 2

[0067] like Figures 4-5 As shown, the difference between Embodiment 2 and Embodiment 1 is that Embodiment 2 has a movable wedge 260 on the side of the set screw 230. Both Embodiment 1 and Embodiment 2 are used for installation at the bottom of the elevator shaft, while Embodiment 1 is a car buffer (in...). Figure 5The middle one marked as A) is adapted to play a buffering role when the elevator car 600 free falls, and the second embodiment is a counterweight buffer (in Figure 5 The middle one marked as B) is adapted to play a buffering role on the counterweight device 700 when the elevator car 600 free falls.

[0068] Specifically, the side of the fastening screw 230 is provided with a mounting port and is used for mounting the movable wedge 260, the movable wedge 260 is provided in a right triangle structure and can be pressed into the fastening screw 230, the movable wedge 260 can refer to the switch of an umbrella, and is always pressed out outwardly under the action of no external force, and can be retracted into the mounting port under the action of external force;

[0069] Further, when the buffering mechanism 200 is in the locking state, the movable wedge 260 is located at the position above the buffer fixing plate 240, so that the movable wedge 260 can be pressed into the mounting port and smoothly ejected in the process of the buffer fixing plate 240 being ejected, and the movable wedge 260 can limit the buffer fixing plate 240 in the process of the buffer fixing plate 240 being repressed, so that the counterweight device 700 free falling is stopped in advance, and the elevator car 600 accidentally free rising is stopped before the set distance value, and the effect of early protection is achieved.

[0070] The technical means disclosed in the scheme of the present application is not limited to the technical means disclosed in the above technical means, and also includes the technical scheme composed of any combination of the above technical features. The above is the specific embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principle of the present application, a number of improvements and refinements can be made, and these improvements and refinements are also considered as the protection scope of the present application.

[0071] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, motion condition, etc. between the components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0072] In addition, the description such as "first", "second", "one" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0073] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, can be internal communication of two elements or interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0074] In addition, the technical solutions among various embodiments of the present application can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the protection scope required by the present application.

Claims

1. An elevator runaway protection device, characterized in that, The application relates to a secondary buffer protection device for an elevator, which comprises a fixed base plate, a buffer mechanism, a main buffer, a release mechanism and a control unit. The buffer mechanism comprises a support assembly arranged on the fixed base plate and a compression spring, the two ends of the compression spring being connected with the upper and lower sides of the support assembly. The main buffer is vertically arranged on the top of the support assembly and forms the secondary buffer protection device with the buffer mechanism. The release mechanism is arranged on the fixed base plate, the locking end of the release mechanism being buckled with the buffer mechanism and enabling the compression spring to be in a compressed state. The control unit is arranged on the support assembly, the release mechanism being connected with the control unit, and the control unit being electrically connected with an external elevator speed limiter, when the elevator speed limiter transmits an electric signal to the control unit, the control unit drives the release mechanism to deform and makes the locking end of the release mechanism disengage from the buffer mechanism, and the buffer mechanism and the main buffer are instantaneously pushed upward under the action of the compression spring. The control unit is an electromagnet, the action controller of the electromagnet being electrically connected with the external elevator speed limiter. The support assembly comprises a pre-tightening force adjusting plate, a tight screw rod, a buffer fixing plate and a spring sliding rail. The tight screw rod is vertically arranged on the fixed base plate and passes through the pre-tightening force adjusting plate, and the upper and lower sides of the pre-tightening force adjusting plate are connected with the tight screw rod through adjusting nuts. The buffer fixing plate is arranged on the tight screw rod, and the buffer fixing plate and the pre-tightening force adjusting plate are respectively close to the upper and lower ends of the tight screw rod. The spring sliding rail is vertically arranged on the pre-tightening force adjusting plate, and the upper end of the spring sliding rail passes through the buffer fixing plate and extends upward. The compression spring is sleeved on the spring sliding rail, and the two ends of the compression spring are respectively connected with the pre-tightening force adjusting plate and the buffer fixing plate. The main buffer is vertically arranged and comprises a connecting part and a buffer part, the connecting part being connected with the buffer fixing plate, and the buffer part being telescopically connected with the connecting part. The release mechanism is arranged in the form of a hook claw and comprises a mounting seat arranged on the fixed base plate, a first connecting part, a hook claw part, and a second connecting part.

2. An elevator runaway protection device according to claim 1, characterized in that One end of the first connecting part is hingedly connected with the mounting seat and forms a first moving point.

3. An elevator runaway protection device according to claim 1, characterized in that The hook claw part is hingedly connected with the other end of the first connecting part and forms a second moving point. One end of the second connecting part is hingedly connected with the electromagnet and the other end is hingedly connected with the second moving point. The locking end of the hook claw part is away from the second moving point and is used for buckling with the buffer fixing plate. When the hook claw part buckles with the buffer fixing plate, the hook claw part and the first connecting part are on the same vertical axis, and the second connecting part is perpendicular to the hook claw part and the first connecting part. When the action controller of the electromagnet receives the signal of the elevator speed limiter, the electromagnet is attracted and drives the second connecting part to move laterally towards the direction where the compression spring is located, at this moment, the second connecting part pulls the second moving point laterally and makes the hook claw part disengage from the buffer fixing plate.

4. An elevator runaway protection device according to claim 3, characterized in that ​ 5. An elevator runaway protection device according to claim 4, characterized in that ​ 6. An elevator runaway protection device according to claim 3, wherein ​ 7. An elevator runaway protection device according to claim 1, wherein The side of the locking screw is provided with a movable wedge, and the position of the movable wedge is higher than the buffer fixing plate when the buffer mechanism is in the locking state.

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