Rail clamping device and elevator

Abstract

The utility model relates to the technical field of elevator safety protection devices, and discloses a rail clamping device and an elevator. The rail clamping device comprises a rail clamping device body and an electromagnet limiting assembly fixedly connected with the rail clamping device body. The even number of sets of wheel shafts are connected with the rail clamping device body, each set of wheel shafts is sleeved with an eccentric cam and a torsion spring, every two opposite sets of eccentric cams and torsion springs are symmetrically arranged, and the two ends of the torsion springs are connected with the rail clamping device body and the eccentric cams respectively; the electromagnet limiting assembly is movably connected with the eccentric cam so that the eccentric cam can be in a corresponding locking or unlocking state. The elevator comprises the rail clamping device, when the elevator is abnormal, the elevator is braked by the rail clamping device under the conditions that a brake loses efficacy, traction force is lost and the like before an elevator speed limiter or a safety clamp acts, and safe operation of the elevator is further guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator safety protection devices, in particular to a rail clamp and an elevator. Background Art

[0002] Current elevator cars are primarily driven by motors, moving vertically along tracks. During installation, maintenance, and emergency rescue operations, the safety clamp below the elevator car clamps onto the guide rails, stopping the elevator car. However, the safety clamp cannot guarantee 100% safety during operation. In particular, after the safety clamp is activated for emergency braking, the safety clamp itself may be damaged, posing a significant risk during operation.

[0003] In order to enhance the operational safety of the elevator and provide a second level of protection for the elevator, a rail clamp will be added to the elevator car track. The existing rail clamp has limited braking capacity and mainly uses an electromagnet disk to directly act on the elevator car track. Due to the limitations of volume, electromagnet and spring force, it mainly maintains the low-speed rail clamping function in the elevator leveling and re-leveling sections, and cannot brake in specific elevator states, such as elevator brake failure, safety clamp failure or insufficient traction force causing abnormal elevator operation. Utility Model Content

[0004] The purpose of the utility model is to overcome the problem in the prior art that the rail clamp cannot effectively brake the elevator when the elevator brake fails, the safety clamp fails or the traction force is insufficient, causing abnormal operation of the elevator. The utility model provides a rail clamp that can brake the elevator when the elevator is in an abnormal situation, before the speed limiter or the safety clamp is activated, when the brake fails, when the traction force is insufficient, etc., to provide further protection for the safe operation of the elevator.

[0005] In order to achieve the above-mentioned object, the present invention provides a rail clamp, comprising a rail clamp body and an electromagnet limit assembly fixedly connected to the rail clamp body;

[0006] An even number of wheel axles are connected to the rail clamp body, and each wheel axle sleeve is provided with an eccentric cam and a torsion spring. The two opposite sets of eccentric cams and torsion springs are symmetrically arranged, and the two ends of the torsion spring are respectively connected to the rail clamp body and the eccentric cam;

[0007] The electromagnet limiting assembly is movably connected to the eccentric cam so that the eccentric cam is in a corresponding locked or unlocked state.

[0008] The rail clamp body serves as the mounting platform, housing the electromagnetic limiter assembly, axle, eccentric cam, and torsion spring. The axle provides space for the eccentric cam and torsion spring. The torsion spring, installed with stored angular energy, provides the power for the eccentric cam to rotate after release. The electromagnetic limiter assembly and the eccentric cam have two connection states. When connected, the eccentric cam is locked and remains stationary. When disconnected, the eccentric cam is unlocked, and the torsion spring forces the eccentric cam to rotate. This causes the two sets of eccentric cams to move toward each other. When the two sets of eccentric cams are close enough to fit together, they clamp the object.

[0009] Preferably, the electromagnet limiting assembly includes an electromagnet assembly and a hook assembly magnetically connected to the electromagnet assembly, the hook assembly includes a connecting plate, a hook arm and a hook portion fixedly connected in sequence, the connecting plate is magnetically connected to the electromagnet assembly, and the hook arm is hinged to the rail clamp body;

[0010] When the electromagnet assembly loses power, the electromagnet assembly and the connecting plate are in a disengaged state, and the hook portion is hooked with the eccentric cam;

[0011] When the electromagnet assembly is energized, the electromagnet assembly is magnetically connected to the connecting plate, so that the hook portion is separated from the eccentric cam.

[0012] The hook assembly serves as a locking and unlocking component of the eccentric cam. The position is limited by the hinged connection between the hook arm and the rail clamp body and the hook connection between the hook part and the eccentric cam. When the connecting plate and the electromagnet assembly are not connected, the hook part is hooked with the eccentric cam to put the eccentric cam in a locked state; when the connecting plate and the electromagnet assembly are connected by magnetic force, the hook part is disengaged from the eccentric cam, putting the eccentric cam in an unlocked state, and the angular energy of the torsion spring is released, thereby driving the eccentric cam to rotate.

[0013] Preferably, the eccentric cam is provided with a hook pin shaft, and when the electromagnet assembly loses power, the hook portion is hooked with the hook pin shaft;

[0014] The arrangement of the hook pin hook shaft facilitates stable hooking of the hook portion of the hook assembly with the eccentric cam.

[0015] Preferably, the rail clamp body includes a top plate and a bottom plate, and a first mounting plate and a second mounting plate are fixedly connected between the top plate and the bottom plate. Two groups of second mounting plates are arranged side by side at a certain interval to place the objects to be clamped, and mounting holes are provided on the two groups of second mounting plates and the first mounting plate to install the wheel axle.

[0016] The rail clamp body includes a top plate, a bottom plate, two sets of first mounting plates, and a second mounting plate. The wheel axle passes through the first and second mounting plates and is stably mounted on the rail clamp body. The two sets of second mounting plates are arranged at a certain distance to provide space for the placement of the object to be clamped.

[0017] Preferably, an embedding hole is provided on the inner wall of the second mounting plate facing the first mounting plate to install one end of the torsion spring, and a torsion spring fixing hole is provided on the eccentric cam to install the other end of the torsion spring.

[0018] The second mounting plate and the eccentric cam are both provided with holes for mounting the ends of the torsion springs, so as to stably clamp the torsion springs storing angular energy between the second mounting plate and the eccentric cam.

[0019] Preferably, the two groups of hook assemblies are correspondingly connected to one group of electromagnet assemblies.

[0020] Two sets of hook assemblies are connected to one set of electromagnet assemblies in correspondence, which can improve the utilization rate of the electromagnet assemblies, reduce the installation of electromagnet assembly equipment, and reduce equipment costs.

[0021] Preferably, the electromagnet assembly is configured as a first electromagnet assembly, which is located on the first mounting plate and fixedly connected to the first mounting plate. When the first electromagnet assembly is energized, the first electromagnet assembly is magnetically connected to the connecting plate to release the eccentric cam.

[0022] The electromagnet assembly can be arranged in various forms, and the first electromagnet assembly is one embodiment thereof. The first electromagnet assembly is installed inside the two sets of hook assemblies. When the first electromagnet assembly is energized, it will attract the connecting plates of the two sets of hook assemblies, causing both sets of hook parts to release the eccentric cam.

[0023] Preferably, the electromagnet assembly is configured as a second electromagnet assembly, which is located outside the first mounting plate and fixedly connected to the first mounting plate. The second electromagnet assembly includes an electromagnet shaft, on which a connecting piece is fixedly connected. When the second electromagnet assembly is energized, the electromagnet shaft drives the connecting piece to move axially and pushes the hook arm to move to release the eccentric cam.

[0024] The second electromagnet assembly is a second embodiment of the electromagnet assembly setting. The second electromagnet assembly is installed on the outside of the hook assembly. It relies on the axial movement of the electromagnet shaft on the electromagnet assembly to push the connecting part to move, thereby pushing the tail ends of the two sets of hook arms to move, forcing the two sets of hook parts to disengage from the eccentric cam, thereby releasing the eccentric cam.

[0025] Preferably, a limit shaft is further provided on the first mounting plate, and the limit shaft is provided with a permanent magnet.

[0026] The setting of the limit shaft is for installing a permanent magnet, which can attract the hook arm to assist the hook part in stably hooking the eccentric cam.

[0027] The second aspect of the present invention provides an elevator, comprising the aforementioned rail clamp, wherein the rail clamp is installed on a beam of the elevator, and an area of ​​the rail clamp for placing objects to be clamped corresponds to the elevator track.

[0028] The rail clamp of the present invention can be used to clamp elevator rails. The rail clamp is mounted on the upper or lower beam of an elevator car. For example, when the rail clamp is mounted on the upper beam of an elevator car, the rail clamp is fixedly installed between the upper beam and the elevator guide shoe, with the area where the object to be clamped is positioned corresponding to the elevator rail. Specifically, mounting holes are provided in the top plate and the base, through which the rail clamp is mounted to the elevator car.

[0029] When the elevator safety system detects an abnormal situation in the elevator (such as elevator brake failure causing unexpected movement of the elevator car, elevator car slipping and bottoming out or hitting the top, speed limiter or safety clamp failure causing the elevator car to fall, elevator car serious slipping, etc.) and the car needs to be stopped, the rail clamp can quickly clamp the elevator track to stop the car.

[0030] Through the above technical solution, the rail clamp of the utility model has a simple structure and a fast response. The eccentric cam can be released when the electromagnet limit assembly is energized. The two relative sets of eccentric cams rotate closer to each other under the action of the torsion spring until the outer parts of the eccentric cams fit together, thereby clamping the object to be clamped. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the final assembly structure of the first embodiment of the rail clamp;

[0032] Figure 2 2. It is a schematic side view of the assembly structure of the first embodiment of the rail clamp;

[0033] Figure 3 This is a structural diagram of the first embodiment of the rail clamp in a locked state;

[0034] Figure 4 1 is a partial structural diagram of the first embodiment of the rail clamp in a locked state;

[0035] Figure 5 2. It is a structural schematic diagram of the first embodiment of the rail clamp in an unlocked state;

[0036] Figure 6 1 is a partial structural diagram of the first embodiment of the rail clamp in an unlocked state;

[0037] Figure 7 2 is a schematic structural diagram of the second embodiment of the rail clamp in a locked state;

[0038] Figure 8 1 is a partial structural diagram of the second embodiment of the rail clamp in a locked state;

[0039] Figure 9 2 is a schematic structural diagram of the second embodiment of the rail clamp in an unlocked state;

[0040] Figure 10 1 is a partial structural diagram of the second embodiment of the rail clamp in an unlocked state;

[0041] Figure 11 It is a structural diagram of the eccentric cam distribution;

[0042] Figure 12 It is a structural diagram of the rail clamp body;

[0043] Figure 13 1. It is a schematic diagram of the top view of the rail clamp body;

[0044] Figure 14 It is a structural diagram of a rail clamp applied to an elevator car.

[0045] Description of Reference Numerals

[0046] 1. Placement area for objects to be clamped; 2. Electromagnet limit assembly; 21. Hook assembly; 211. Connecting plate; 212. Hook arm; 213. Hook portion; 22. First electromagnet assembly; 23. Hook shaft; 24. Limit shaft; 25. Second electromagnet assembly; 26. Connector; 3. Eccentric cam; 301. First eccentric cam; 302. Second eccentric cam; 303. Third eccentric cam; 304. Fourth eccentric cam; 31. Hook pin shaft; 32. Torsion spring fixing hole; 4. Torsion spring; 5. Axle; 6. Rail clamp body; 61. Top plate; 62. Bottom plate; 63. First mounting plate; 64. Second mounting plate; 65. Reinforcing rib; 7. Retaining spring; 8. Retaining pin; 9. Elevator; 91. Elevator car upper beam; 92. Elevator rail; 93. Elevator guide shoe; 10. Rail clamp. DETAILED DESCRIPTION

[0047] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0048] In the present invention, unless otherwise specified, directional words such as "up, down, left, right, inside, outside, far, near, front" generally refer to the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and therefore cannot be understood as limitations on the present invention.

[0049] like Figures 1 to 10The figure shows a rail clamp, comprising a rail clamp body 6 and an electromagnet limit assembly 2 fixedly connected to the rail clamp body 6;

[0050] An even number of wheel axles 5 are connected to the rail clamp body 6. Each wheel axle 5 is provided with an eccentric cam 3 and a torsion spring 4. The two opposing sets of eccentric cams 3 and torsion springs 4 are symmetrically arranged. The two ends of the torsion spring 4 are connected to the rail clamp body 6 and the eccentric cam 3 respectively.

[0051] The electromagnet limiting assembly 2 is movably connected to the eccentric cam 3 so that the eccentric cam 3 is in a corresponding locked or unlocked state.

[0052] Specifically, the rail clamp 10 includes a rail clamp body 6, an electromagnet limit assembly 2, an eccentric cam 3, a torsion spring 4 and a wheel axle 5. The rail clamp body 6 is a plate member, such as Figure 1 As shown. Wherein, the wheel axle 5 is connected to the track clamp body 6, and the outer periphery of the wheel axle 5 is sequentially sleeved with an eccentric cam 3 and a torsion spring 4, and the torsion spring 4 has a forward torsion spring and a reverse torsion spring, and the eccentric cam 3 and the torsion spring 4 correspond to each other and are symmetrically arranged in the horizontal direction. It should be noted that the torsion spring 4 is sleeved on the wheel axle 5 after storing a certain amount of angular energy, and the two ends of the torsion spring 4 storing angular energy are respectively connected to the track clamp body 6 and the eccentric cam 3, that is, one end of the torsion spring 4 is connected to the track clamp body 6, and the other end is connected to the eccentric cam 3, and the eccentric cam 3 is restricted from rotating by the electromagnet limit assembly 2 fixed on the track clamp body 6, so that the torsion spring 4 can maintain the stored angular energy. In order to better sleeve the eccentric cam 3 on the wheel axle 5, the interior of the eccentric cam 3 can be designed as a circular hole and the inner diameter of the circular hole matches the outer diameter of the wheel axle 5. The outer peripheral surface of the eccentric cam 3 is milled to increase the friction of the eccentric cam 3.

[0053] The electromagnetic limiting assembly 2 is fixedly connected to the rail clamp body 6, and the fixed connection can be welding or bolting. When the electromagnet loses power, the electromagnetic limiting assembly 2 is connected to the eccentric cam 3 to limit the rotation of the eccentric cam 3. At this time, all eccentric cams 3 are in a locked state and cannot rotate. When the electromagnet is energized, the electromagnetic limiting assembly 2 is disengaged from the eccentric cam 3, releasing the eccentric cam 3. At this time, the eccentric cam 3 is not restricted by the electromagnetic limiting assembly 2, and the angular energy of the torsion spring 4 is released, thereby driving the eccentric cam 3 to rotate. The two relative groups of eccentric cams 3 rotate with the spacing gradually becoming smaller under the action of the positive and negative torsion springs 4. Between the two relative groups of eccentric cams is the placement area for the object to be clamped. When the spacing between the two relative groups of eccentric cams 3 is reduced to fully fit with the object to be clamped, the object to be clamped can be stably clamped.

[0054] Furthermore, the electromagnet limit assembly 2 includes an electromagnet assembly and a hook assembly 21 magnetically connected to the electromagnet assembly. The hook assembly 21 includes a connecting plate 211, a hook arm 212 and a hook portion 213 fixedly connected in sequence. The connecting plate 211 is magnetically connected to the electromagnet assembly, and the hook arm 212 is hinged to the rail clamp body 6.

[0055] When the electromagnet assembly loses power, the electromagnet assembly and the connecting plate 211 are in a disengaged state, and the hook portion 213 is hooked with the eccentric cam 3;

[0056] When the electromagnet assembly is energized, the electromagnet assembly is magnetically connected to the connecting plate 211 , so that the hook portion 213 is separated from the eccentric cam 3 .

[0057] Specifically, such as Figure 4 and Figure 8 As shown, the electromagnet limit assembly 2 consists of an electromagnet assembly and a hook assembly 21, which are connected to the hook assembly 21 via magnetic force. The hook assembly 21 includes a connecting plate 211, a hook arm 212, and a hook portion 213. The hook portion is located at the head of the hook arm 212, and the connecting plate 211 is located at the tail of the hook arm 212. The fixed connection between the connecting plate 211, the hook arm 212, and the hook portion 213 can be welded or integrally formed, preferably integrally formed.

[0058] The hook portion 213 is connected to or disconnected from the eccentric cam 3, the connecting plate 211 is connected to or disconnected from the electromagnet assembly, and the middle portion of the hook arm 212 is hinged to the rail clamp body 6. Specifically, when the electromagnet loses power, the electromagnet assembly is disconnected from the hook assembly 21. At this time, the hook assembly 21 is connected to the eccentric cam 3, restricting the rotation of the eccentric cam 3. The eccentric cam 3 is in a locked state, thereby allowing the torsion spring 4 to maintain the stored angular energy, such as Figure 4 and Figure 8 When the electromagnet is energized, the electromagnet assembly is connected to the connecting plate 211 of the hook assembly 21. At this time, the hook portion 213 is separated from the eccentric cam 3 under the action of the electromagnet assembly, releasing the eccentric cam 3. Figure 6 and Figure 10 , the eccentric cam 3 is in an unlocked state, and the angular energy of the torsion spring 4 is released, thereby driving the eccentric cam 3 to rotate.

[0059] It should be noted that in order to achieve the hinged connection between the middle part of the hook arm 212 and the rail clamp body 6, the hook shaft 23 can be fixedly installed at the position corresponding to the first mounting plate 63 and the middle part of the hook arm 212. The height of the hook shaft 23 needs to match the height of the eccentric cam 3 so that the hook assembly 21 can be installed on the hook shaft 23, and can also be connected to the eccentric cam 3.

[0060] Furthermore, the eccentric cam 3 is provided with a hook pin shaft 31. When the electromagnet assembly loses power, the hook portion 213 is hooked with the hook pin shaft 31.

[0061] like Figure 4 As shown, a hook pin and hook shaft 31 is fixedly connected to the eccentric cam 3. The fixed connection can be integrally formed or welded, so that the hook portion 213 can better hook the eccentric cam 3, improving the connection stability between the hook assembly 21 and the eccentric cam 3. When the electromagnet assembly loses power, the hook portion 213 hooks with the hook pin and hook shaft 31, thereby locking the eccentric cam 3.

[0062] Furthermore, the rail clamp body 6 includes a top plate 61 and a bottom plate 62, and a first mounting plate 63 and a second mounting plate 64 are fixedly connected between the top plate 61 and the bottom plate 62. Two groups of second mounting plates 64 are arranged in parallel at a certain interval to place the objects to be clamped, and mounting holes are provided on the two groups of second mounting plates 64 and the first mounting plate 63 to install the wheel axle 5.

[0063] like Figure 12 and Figure 13 As shown, the rail clamp body 6 includes a top plate 61, a bottom plate 62, a first mounting plate 63, and a second mounting plate 64. The first mounting plate 63 and the second mounting plate 64 are distributed parallel to each other between the top plate 61 and the bottom plate 62. The spacing between the first mounting plate 63 and the second mounting plate 64 is preferably sufficient to mount the torsion spring 4 and the eccentric cam 3. Two groups of first mounting plates 63 are arranged in parallel. The spacing between the two groups of second mounting plates 64 is sufficient to accommodate the object to be clamped. Mounting holes are provided at corresponding positions of the two groups of first mounting plates 63 and second mounting plates 64 so that the wheel axle 5 can pass through them respectively.

[0064] It should be noted that, in order for the axle 5 to be stably mounted on the first mounting plate 63 and the second mounting plate 64, a retaining spring 7 is provided at the connection between the axle 5 and the second mounting plate 64 in the axial direction to limit the movement of the axle 5 in the axial direction. Figure 11 As shown, preferably, an inner retaining spring 7 and an outer retaining spring 7 can be installed at the inner and outer connection points of the wheel shaft 5 and the second mounting plate 64, respectively. At the same time, a retaining groove for the retaining spring 7 is provided at the inner and outer connection points of the wheel shaft 5 and the second mounting plate 64. In order to limit the rotation of the wheel shaft 5, the wheel shaft 5 is connected to the second mounting plate 64 in the radial direction through a bayonet 8, as shown in FIG. Figure 4 Specifically, a concave hole can be provided on the wheel axle 5, and a through hole can be provided on the side surface of the second mounting plate 64 at a position corresponding to the concave hole of the wheel axle 5, so that the bayonet 8 passes through the through hole into the concave hole of the wheel axle 5, so that a part of the bayonet 8 is located in the concave hole and the other part is located in the through hole.

[0065] In order to enhance the stability of the rail clamp body 6 , a reinforcing rib 65 may be fixedly connected to the second mounting plate 64 to enhance the connection stability between the top plate 61 , the bottom plate 62 and the first mounting plate 63 , the second mounting plate 64 .

[0066] Furthermore, an embedding hole is defined on the inner wall of the second mounting plate 64 facing the first mounting plate 63 to mount one end of the torsion spring 4 , and a torsion spring fixing hole 32 is defined on the eccentric cam 3 to mount the other end of the torsion spring 4 .

[0067] An embedding hole is provided on the inner wall of the second mounting plate 64 near the torsion spring 4 to match the end structure of the torsion spring 4, and a torsion spring fixing hole 32 is provided on the eccentric cam 3 to match the end structure of the torsion spring 4. Figure 3 As shown, after the torsion spring 4 stores angular energy, its ends are inserted into the embedding hole and the torsion spring fixing hole, respectively, to define the shape of the torsion spring 4 and maintain the angular energy of the torsion spring 4. Specifically, the eccentric cam 3 has multiple torsion spring fixing holes 32 evenly distributed, and the second mounting plate 64 also has multiple embedding holes distributed, so that the ends of the torsion spring 4 can be inserted into holes with similar distances during installation.

[0068] Furthermore, the two sets of hook components 21 are correspondingly connected to one set of electromagnet components.

[0069] like Figure 4 and Figure 8 As shown, the two groups of hook components 21 are symmetrically distributed, corresponding to one group of electromagnet components, which can improve the use efficiency of the electromagnet limit component 2, reduce the installation space, and reduce the installation cost of the equipment.

[0070] Furthermore, the electromagnet assembly is configured as a first electromagnet assembly 22, which is located on the first mounting plate 63 and fixedly connected to the first mounting plate 63. When the first electromagnet assembly 22 is energized, the first electromagnet assembly 22 is magnetically connected to the connecting plate 211 to release the eccentric cam 3.

[0071] The electromagnet assembly is provided so as to be able to connect and disconnect the electromagnet assembly with the hook assembly 21. Figures 3 to 6 The first embodiment of the electromagnet assembly is shown, in which the electromagnet assembly is set as a first electromagnet assembly 22. Specifically, the first electromagnet assembly 22 is located on the first mounting plate 63, located inside the entire rail clamp body 6, and the two sets of hook assemblies 21 are respectively distributed on the outside of the first electromagnet assembly 22.

[0072] like Figure 3 and Figure 4In the embodiment shown, when the first electromagnet assembly 22 loses power, the hook portion 213 hooks the hook pin hook shaft 31 of the eccentric cam 3, the hook assembly 21 is positioned by the hook shaft 23 and the hook pin hook shaft 31, the eccentric cam 3 is positioned by the hook assembly 21 and the torsion spring 4, and the torsion spring 4 is positioned by the eccentric cam 3 and the second mounting plate 64. This is the locked state of the eccentric cam 3, which is suitable for situations where the object to be clamped does not need to be clamped.

[0073] like Figure 5 and Figure 6 In the illustrated embodiment, when the first electromagnet assembly 22 is energized, the first electromagnet assembly 22 magnetically secures the connecting plate 211 of the hook assembly 21, disengaging the hook portion 213 from the hook pin 31 of the eccentric cam 3, thereby releasing the eccentric cam 3 and placing the eccentric cam 3 in an unlocked state. At this point, the angular energy stored in the torsion spring 4 is gradually released, driving the eccentric cam 3 to rotate. Under the action of the forward and reverse rotation of the torsion spring 4, the two opposing sets of eccentric cams 3 rotate toward each other until the two opposing sets of eccentric cams 3 contact and secure the object to be clamped. This embodiment is suitable for situations where the object to be clamped requires clamping.

[0074] The electromagnet assembly of this embodiment has a simple structure and requires a small installation space.

[0075] Furthermore, the electromagnet assembly is configured as a second electromagnet assembly 25, which is located outside the first mounting plate 63 and fixedly connected to the first mounting plate 63. The second electromagnet assembly 25 includes an electromagnet shaft, on which a connecting member 26 is fixedly connected. When the second electromagnet assembly 25 is energized, the electromagnet shaft drives the connecting member 26 to move axially and pushes the hook arm 212 to move, thereby releasing the eccentric cam 3.

[0076] like Figures 7 to 10 The figure shows a second embodiment of an electromagnet assembly configuration, in which the electromagnet assembly is configured as a second electromagnet assembly 25. Specifically, the second electromagnet assembly 25 is located outside the first mounting plate 63 and is fixedly connected to the first mounting plate 63 via a mounting bracket. The fixed connection can be welded or bolted. The two sets of hook assemblies 21 are respectively distributed on the inner side of the second electromagnet assembly 25. The second electromagnet assembly 25 includes an electromagnet shaft. A connector 26 is bolted to the end of the electromagnet shaft near the hook assembly 21. When energized, the electromagnet shaft can move axially, thereby driving the connector 26 to move.

[0077] like Figure 7 and Figure 8In the embodiment shown, when the second electromagnet assembly 25 loses power, the hook portion 213 hooks the hook pin hook shaft 31 of the eccentric cam 3, the hook assembly 21 is positioned by the hook shaft 23 and the hook pin hook shaft 31, the eccentric cam 3 is positioned by the hook assembly 21 and the torsion spring 4, and the torsion spring 4 is positioned by the eccentric cam 3 and the second mounting plate 64. This is the locked state of the eccentric cam 3, which is suitable for situations where the object to be clamped does not need to be clamped.

[0078] like Figure 9 and Figure 10 In the embodiment, when the second electromagnet assembly 25 is energized, the electromagnet shaft moves axially toward the hook assembly 21, thereby driving the connecting member 26 to move toward the hook assembly 21. The movement of the connecting member 26 pushes the tail end of the hook assembly 21 to disengage the hook portion 213 from the hook pin 31 of the eccentric cam 3, thereby releasing the eccentric cam 3 and placing the eccentric cam 3 in an unlocked state. At this time, the angular energy stored in the torsion spring 4 is gradually released, driving the eccentric cam 3 to rotate. Under the action of the forward and reverse rotation of the torsion springs 4, the two opposing sets of eccentric cams 3 rotate toward each other until the two opposing sets of eccentric cams 3 are in contact with the object to be clamped, thereby clamping the object to be clamped. This embodiment is suitable for situations where the object to be clamped requires clamping.

[0079] The electromagnet assembly of this embodiment can provide stable thrust with fast and stable response.

[0080] Furthermore, a limit shaft 24 is provided on the first mounting plate 63 , and the limit shaft 24 is provided with a permanent magnet.

[0081] In order to further stabilize the state of the hook portion, a limit shaft 24 is provided at a position corresponding to the hook assembly 21 on the first mounting plate 63, and a permanent magnet is installed on the limit shaft 24. The permanent magnet can magnetically attract the tail of the hook arm 212, so that the hook portion 213 can be better hooked with the eccentric cam 3, as shown in FIG. Figure 4 and Figure 8 shown.

[0082] like Figure 14 An elevator is shown, comprising the aforementioned rail clamp 10 , which is mounted on a beam of an elevator 9 , with an object placement area 1 of the rail clamp 10 corresponding to an elevator track 92 .

[0083] The rail clamp 10 of the present invention can be used to clamp the elevator rail 92. The rail clamp 10 of the present invention is installed on the upper beam or lower beam of the elevator car. Taking the rail clamp 10 installed on the elevator car upper beam 91 as an example, the rail clamp 10 is fixedly installed between the elevator car upper beam 91 and the elevator guide shoe 93. The area 1 of the rail clamp 10 where the object to be clamped is placed corresponds to the elevator rail 92. Specifically, Figure 1As shown, mounting holes are provided on the top plate 61 and the bottom plate 62, and the rail clamp 10 is mounted on the elevator car through the mounting holes. Figure 1 Taking the structure of the rail clamp 10 as an example, the object placement area 1 of the rail clamp 10 corresponds to the elevator track 92, four groups of axles 5 are provided, and four groups of eccentric cams 3 and torsion springs 4 are symmetrically arranged, as shown in FIG. Figure 11 As shown, the first eccentric cam 301 and the second eccentric cam 302 are symmetrically arranged, the third eccentric cam 303 and the fourth eccentric cam 304 are symmetrically arranged, and the minimum distances of the two symmetrical groups of eccentric cams 3 are opposite to each other.

[0084] Taking the first embodiment of the rail clamp 10 as an example, the rail clamp 10 is mounted on the upper beam or lower beam of the elevator car 9 by bolts. For example, if the rail clamp 10 is mounted on the upper beam 91 of the elevator car, Figure 14 As shown, the rail clamp 10 comprises four sets of axles 5, four sets of eccentric cams 3, four sets of torsion springs 4, and two sets of electromagnet stopper assemblies 2. The four sets of eccentric cams 3 and four sets of torsion springs 4 are symmetrically arranged in two opposing sets, with the minimum inner diameters of the two opposing sets of eccentric cams 3 symmetrically arranged. When the elevator 9 is operating normally, the electromagnet is de-energized, and the hook portion 213 of the hook assembly 21 is hooked via the hook shaft 23 onto the hook pin 31 of the eccentric cam, which has been subjected to the torsion force of the torsion springs 4. The tail end of the hook assembly 21 is attracted by the permanent magnet on the stopper shaft 24, maintaining the hook portion 213 locked to the eccentric cam 3. At this point, the distance between the symmetrical eccentric cams 3 is at its maximum, the eccentric cams 3 are separated from the elevator track 92, and the elevator operates normally. When the elevator safety system detects an abnormal situation in the elevator 9 (such as elevator brake failure causing unexpected movement of the elevator car, elevator car slipping and hitting the bottom or top, speed limiter or safety clamp failure causing the elevator car to fall, or elevator car severe slipping), and the car needs to be stopped, the electromagnet limit assembly is energized, restricting the opening and closing operation of the elevator car and disconnecting the elevator safety circuit relay. Simultaneously, the electromagnet generates magnetic force, and the first electromagnet assembly 22 magnetically attracts the connecting plate 211 of the hook assembly 21, causing the hook portion 213 to disengage the hook pin hook shaft 31 on the eccentric cam 3, and the eccentric cam 3 is released and unlocked. At this time, under the action of the positive and negative torsion springs 4, the first eccentric cam 301 and the fourth eccentric cam 304 rotate counterclockwise along the axle 5, and the second eccentric cam 302 and the third eccentric cam 303 rotate clockwise along the axle 5. The distance between at least two sets of relative eccentric cams 3 and the elevator track 92 is reduced to complete fit by the action of the torsion springs 4. The two relative eccentric cams 3 are pressed tighter and tighter in the direction of the elevator track 92, and finally the elevator car is stopped.

[0085] It should be noted that the power for the rotation of the eccentric cam 3 comes from the forward and reverse torsion springs 4 installed on the four sets of wheel axles 5. The torsion springs 4 are installed in a stressed state with stored angular energy during installation. One end of the torsion spring 4 with stored angular energy is installed in the torsion spring fixing hole 32 of the eccentric cam 3, and the other end is installed in the embedded hole of the second mounting plate 64. After the hook portion 213 is disengaged from the hook pin hook shaft 31 of the eccentric cam 3 due to the attraction of the electromagnet, the release of the angular energy of the torsion spring 4 generates torque, which drives the eccentric cam 3 to rotate along the wheel axle 5.

[0086] It should be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0087] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A rail clamp, characterized in that: It comprises a rail clamp body (6) and an electromagnet limiting assembly (2) fixedly connected to the rail clamp body (6); An even number of wheel axles (5) are connected to the rail clamp body (6); each set of wheel axles (5) is sleeved with an eccentric cam (3) and a torsion spring (4); two opposing sets of eccentric cams (3) and torsion springs (4) are symmetrically arranged; and two ends of the torsion spring (4) are respectively connected to the rail clamp body (6) and the eccentric cam (3); The electromagnet limiting assembly (2) is movably connected to the eccentric cam (3) so that the eccentric cam (3) is in a corresponding locked or unlocked state.

2. The rail clamp according to claim 1, characterized in that: The electromagnet limiting assembly (2) comprises an electromagnet assembly and a hook assembly (21) magnetically connected to the electromagnet assembly, the hook assembly (21) comprising a connecting plate (211), a hook arm (212) and a hook portion (213) fixedly connected in sequence, the connecting plate (211) being magnetically connected to the electromagnet assembly, and the hook arm (212) being hinged to the rail clamp body (6); When the electromagnet assembly loses power, the electromagnet assembly and the connecting plate (211) are in a disengaged state, and the hook portion (213) is hooked with the eccentric cam (3); When the electromagnet assembly is energized, the electromagnet assembly is magnetically connected to the connecting plate (211) so that the hook portion (213) is separated from the eccentric cam (3).

3. The rail clamp according to claim 2, characterized in that: The eccentric cam (3) is provided with a hook pin shaft (31), and when the electromagnet assembly loses power, the hook portion (213) is hooked with the hook pin shaft (31).

4. The rail clamp according to claim 2, characterized in that: The rail clamp body (6) comprises a top plate (61) and a bottom plate (62), wherein a first mounting plate (63) and a second mounting plate (64) are fixedly connected between the top plate (61) and the bottom plate (62), and two groups of the second mounting plates (64) are arranged in parallel at a certain interval to place objects to be clamped, and mounting holes are provided on the two groups of the second mounting plates (64) and the first mounting plates (63) to mount the wheel axle (5).

5. The rail clamp according to claim 4, characterized in that: The second mounting plate (64) is provided with an embedded hole on the inner wall facing the first mounting plate (63) to install one end of the torsion spring (4), and the eccentric cam (3) is provided with a torsion spring fixing hole (32) to install the other end of the torsion spring (4).

6. The rail clamp according to claim 5, characterized in that: The two groups of hook components (21) are correspondingly connected to one group of electromagnet components.

7. The rail clamp according to claim 6, characterized in that: The electromagnet assembly is configured as a first electromagnet assembly (22), the first electromagnet assembly (22) being located on the first mounting plate (63) and fixedly connected to the first mounting plate (63), and when the first electromagnet assembly (22) is energized, the first electromagnet assembly (22) is magnetically connected to the connecting plate (211) to release the eccentric cam (3).

8. The rail clamp according to claim 6, characterized in that: The electromagnet assembly is configured as a second electromagnet assembly (25), the second electromagnet assembly (25) being located outside the first mounting plate (63) and fixedly connected to the first mounting plate (63), the second electromagnet assembly (25) comprising an electromagnet shaft, a connecting piece (26) being fixedly connected to the electromagnet shaft, and when the second electromagnet assembly (25) is energized, the electromagnet shaft drives the connecting piece (26) to move axially and pushes the hook arm (212) to move, thereby releasing the eccentric cam (3).

9. The rail clamp according to claim 7 or 8, characterized in that: A limiting shaft (24) is also provided on the first mounting plate (63), and the limiting shaft (24) is provided with a permanent magnet.

10. An elevator, characterized in that: The invention comprises a rail clamp (10) as described in any one of claims 1 to 9, wherein the rail clamp (10) is installed on the beam of the elevator (9), and the object placement area (1) of the rail clamp (10) corresponds to the elevator track (92).

Images