Four safety clamp synchronous lifting mechanism

Abstract

The utility model discloses a four safety tongs synchronous lifting mechanism, including two sets of lower beams and long connecting shafts, still include the shaft coupling pipe, install a short shaft on every lower beam, the short shaft is connected with the short shaft of another set of lower beams through long connecting shaft, and is fixed through the shaft coupling pipe between long connecting shafts, the both ends of shaft coupling pipe are connected hexagon nut, and are set up through hexagon screw jacking long connecting shaft on the slotted portion. The shaft coupling pipe: the utility model adopts the pipe connection long connecting shaft of two sets of lower beams of welding nut both ends, and is fixed through hexagon screw jacking, eliminates the virtual position, and the shaft body sets up the slotted portion of different size, and is fixed with steel wire rope handle, horizontal pull connecting piece and safety tongs handle through the key and screw respectively, and the left and right threads are designed to the both ends of screw rod, and the position fine adjustment is realized with hexagon nut and locks, and reset spring fixed support: through fixed support accurate installation reset spring, ensures the reset consistency of safety tongs.

Description

Technical Field

[0001] This utility model belongs to the field of elevator safety braking technology, specifically relating to a four-safety-clamp synchronous lifting mechanism. Background Technology

[0002] Existing safety clamp lifting mechanisms for heavy-duty elevators typically employ two independent lower beam structures, with two safety clamps mounted on each beam. Synchronous movement of the two lower beams is achieved via a linkage shaft. However, due to the combined effects of machining tolerances and assembly misalignment, a time lag exists between the actions of the safety clamps on the two lower beams. This misalignment needs to be reduced by welding fixing bolts after installation and commissioning. This approach has the following drawbacks:

[0003] Poor synchronization: The misalignment causes the two sets of lower beam safety brakes to fail to move synchronously in an instant, affecting the braking effect;

[0004] Complex debugging: requires on-site welding and fixing, increasing installation time and cost;

[0005] Maintenance difficulties: The welded structure is difficult to disassemble, making later maintenance or replacement of parts inconvenient.

[0006] Therefore, there is an urgent need for a lifting mechanism that requires no welding, can eliminate misalignment, and enables the instantaneous synchronous action of the four safety clamps. Utility Model Content

[0007] In view of the problems mentioned in the background technology above, the purpose of this utility model is to provide a four-safety-clamp synchronous lifting mechanism, which is a stable and easy-to-install synchronous lifting mechanism that does not require welding, can eliminate misalignment, and can realize instantaneous synchronous action of the four safety clamps.

[0008] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0009] A four-safety-clamp synchronous lifting mechanism includes two sets of lower beams and long connecting shafts, as well as a coupling tube. Each lower beam is equipped with a short shaft, which is connected to the short shaft of the other lower beam through the long connecting shaft. The long connecting shafts are fixed together by the coupling tube, and hexagonal nuts are connected to both ends of the coupling tube. The long connecting shaft is tightened with slots provided on the long connecting shaft by hexagonal screws.

[0010] Further defined, it also includes a safety clamp pull handle, a wire rope handle, a hexagonal screw and a nut. The long connecting shaft is provided with a first slot and a second slot. The first slot is connected to the wire rope handle by a flat key. The first slot is also connected to the safety clamp pull handle by a flat key and locked by a hexagonal screw and a nut. The second slot is fixed to the coupling tube by a hexagonal screw and a nut.

[0011] Furthermore, the inner wall of the coupling tube is provided with anti-slip texture, and the contact surface between the coupling tube and the long connecting shaft is fixed by a tightening screw.

[0012] Further specifying, the lower beam is provided with a fixed bracket, and a return spring is installed inside the fixed bracket, with one end of the return spring connected to a horizontal tie rod.

[0013] Further specifying, the safety clamp lifting handle is fixed to the connecting bracket by a shaft pin and a cotter pin, and the end of the connecting bracket is connected to a screw rod, the two ends of which are provided with left and right threads and are locked by hexagonal nuts.

[0014] Furthermore, the screw has a hexagonal head in the middle for adjusting the installation position of the connecting bracket.

[0015] Further, it also includes a horizontal tie rod, which is connected to the long connecting shaft via the tie rod. The tie rod has a U-shaped structure and is fixed at both ends by bolts.

[0016] Further specifying, the wire rope handle is connected to the elevator speed governor via the speed governor wire rope, and the wire rope handle is also connected to a long connecting shaft. When the elevator speed governor is activated, the wire rope handle is lifted, synchronously driving the long connecting shafts of the two sets of lower beams.

[0017] Further defined, each safety clamp includes a safety clamp body, an elevator car frame column, and an elevator rail, wherein the elevator car frame column is fixedly connected to the safety clamp body, and the elevator rail is arranged opposite to the elevator car frame column.

[0018] The technical solution of this utility model:

[0019] Coupling tube: A round tube with welded nuts at both ends is used to connect the long connecting shafts of the two lower beams, and is tightened with hexagonal screws to eliminate play;

[0020] Long connecting shaft optimization: The shaft body is equipped with slots of different sizes, which are respectively fixed to the wire rope handle, the cross tie connector and the safety clamp handle by flat keys and screws;

[0021] Adjustable connecting bracket: The screw is designed with left and right threads at both ends, which can be used with hexagonal nuts to achieve fine-tuning and locking of the position;

[0022] Reset Spring Fixing Bracket: The reset spring is precisely installed using the fixing bracket to ensure consistent reset of the safety clamp.

[0023] Technical effects of this utility model:

[0024] Improved synchronization: The rigid connection between the coupling tube and the long connecting shaft eliminates misalignment, and the four safety clamps move instantaneously and synchronously.

[0025] Easy installation: No on-site welding is required; simply tighten the screws to complete the installation.

[0026] Low maintenance costs: The modular design facilitates disassembly and replacement of parts. Attached Figure Description

[0027] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0028] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a four-safety-clamp synchronous lifting mechanism of this utility model;

[0029] Figure 2 This is an enlarged schematic diagram of an embodiment of a four-safety-clamp synchronous lifting mechanism of the present invention;

[0030] Figure 3 This is a schematic diagram of the coupling tube structure of an embodiment of a four-safety-clamp synchronous lifting mechanism of the present invention;

[0031] Figure 4 This is a schematic diagram of the long connecting shaft structure of an embodiment of a four-safety-clamp synchronous lifting mechanism of this utility model.

[0032] The symbols for the main components are explained as follows: Lower beam 1, Long connecting shaft 2, Safety clamp lifting handle 4, Horizontal tie rod 7, Short shaft 9, Return spring 11, Horizontal tie rod 13, First slot 21, Second slot 22, Safety clamp 36, Elevator car frame column 49, Wire rope handle 51, Speed ​​governor wire rope 54, Elevator track 55, Fixed bracket 58, Coupling tube 64, Connecting bracket 66, Screw 67, Shaft pin 68, Cotter pin 70, Hex bolt 73, Nut 74. Detailed Implementation

[0033] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] like Figure 1 As shown, the present invention provides a four-safety-clamp synchronous lifting mechanism, including two sets of lower beams 1 and long connecting shafts 2, and also includes a coupling tube 64. Each lower beam 1 is equipped with a short shaft 9, which is connected to the short shaft 9 of the other set of lower beams 1 through the long connecting shaft 2. The long connecting shafts 2 are fixed together by the coupling tube 64. The two ends of the coupling tube 64 are connected to hexagonal nuts, and are tightened with hexagonal screws to the slots provided on the long connecting shafts 2.

[0037] In the practical application of this embodiment, it also includes a safety clamp pull handle 4, a wire rope handle 51, a hexagonal screw 73 and a nut 74. The long connecting shaft 2 is provided with a first slot 21 and a second slot 22. The first slot 21 is connected to the wire rope handle 51 by a flat key. The first slot 21 is also connected to the safety clamp pull handle 4 by a flat key and locked by the hexagonal screw 73 and the nut 74. The second slot 22 is fixed to the coupling tube 64 by the hexagonal screw 73 and the nut 74.

[0038] In the practical application of this embodiment, the inner wall of the coupling tube 64 is provided with anti-slip texture, and the contact surface between the coupling tube 64 and the long connecting shaft 2 is fixed by a tightening screw.

[0039] In the practical application of this embodiment, a fixed bracket 58 is provided on the lower beam 1, and a return spring 11 is installed inside the fixed bracket 58. One end of the return spring 11 is connected to the horizontal tie rod 13.

[0040] In the practical application of this embodiment, the safety clamp lifting handle 4 is fixed to the connecting bracket 66 by the shaft pin 68 and the cotter pin 70. The end of the connecting bracket 66 is connected to the screw 67, which has left and right threads at both ends and is locked by hexagonal nuts.

[0041] In the practical application of this embodiment, the screw 67 is provided with a hexagonal head in the middle, which is used to adjust the installation position of the connecting bracket 66.

[0042] In the practical application of this embodiment, a horizontal tie rod 7 is also included. The horizontal tie rod 13 is connected to the long connecting shaft 2 through the horizontal tie rod 7. The horizontal tie rod 7 has a U-shaped structure, and both ends of the horizontal tie rod 7 are fixed by bolts.

[0043] In the practical application of this embodiment, the wire rope handle 51 is connected to the elevator speed governor via the speed governor wire rope 54. The wire rope handle 51 is also connected to the long connecting shaft 2. When the elevator speed governor is activated, the wire rope handle 51 is lifted, which synchronously drives the long connecting shaft 2 of the two sets of lower beams 1.

[0044] In the practical application of this embodiment, each safety clamp includes a safety clamp body 36, an elevator car frame column 49, and an elevator track 55. The elevator car frame column 49 is fixedly connected to the safety clamp body 36, and the elevator track 55 is arranged opposite to the elevator car frame column 49.

[0045] The working principle of the safety clamp is as follows:

[0046] The safety clamp lever drives the speed governor wire rope 54, and the tensioning wheel maintains the friction between the speed governor wire rope 54 and the speed governor wheel, so that the speed governor wheel speed is consistent with the car running speed.

[0047] When the car (safety gear, safety gear lever, governor wire rope 54, governor wheel) runs at a speed ≥115% of the rated speed, the governor activates. The brake rope block compresses the governor wire rope 54, stopping its operation and triggering the safety gear lever, causing the safety gear to activate. Based on this, the elevator uses two identical elevator lifting mechanisms, synchronized by a coupling tube 64. When the governor activates, the wire rope handle 51 is lifted, instantly synchronizing the two lifting mechanisms, i.e., simultaneously lifting all four safety gears to brake and forcibly stop the car.

[0048] Example 1: Standard Heavy-Duty Elevator

[0049] In an elevator with a rated load of 5000kg, the coupling tube 64 is made of seamless steel pipe with a wall thickness of 5mm, with M12 nuts welded to both ends. The groove depth of the long connecting shaft 2 is 3mm, and it is tightened with M12 hex bolts. Post-installation testing shows that the time difference between the action of the four safety clamps is ≤0.1 seconds.

[0050] Example 2: Elevator for Extremely Cold Environments

[0051] The similarities between this embodiment and Embodiment 1 will not be repeated here. The difference is that, in a low-temperature environment, the inner wall of the coupling tube 64 is coated with antifreeze grease, and the long connecting shaft 2 is made of stainless steel, thereby avoiding misalignment caused by low-temperature shrinkage.

[0052] Example 3: Removable and maintainable design

[0053] The similarities between this embodiment and Embodiment 1 will not be repeated here. The difference is that a quick-release buckle is added at the connection between the coupling tube 64 and the long connecting shaft 2 in this embodiment, which facilitates quick disassembly during regular maintenance without removing the entire lower beam 1.

[0054] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A four-safety-clamp synchronous lifting mechanism, characterized in that: It includes two sets of lower beams (1) and long connecting shafts (2), as well as a coupling tube (64). Each lower beam (1) is equipped with a short shaft (9). The short shaft (9) is connected to the short shaft (9) of the other lower beam (1) through the long connecting shaft (2). The long connecting shafts (2) are fixed together by the coupling tube (64). The two ends of the coupling tube (64) are connected to hexagonal nuts and are tightened with hexagonal screws to the slots provided on the long connecting shafts (2).

2. The four-safety-clamp synchronous lifting mechanism according to claim 1, characterized in that: It also includes a safety clamp pull handle (4), a wire rope handle (51), a hexagonal screw (73) and a nut (74). The long connecting shaft (2) is provided with a first slot (21) and a second slot (22). The first slot (21) is connected to the wire rope handle (51) by a flat key. The first slot (21) is also connected to the safety clamp pull handle (4) by a flat key and locked by a hexagonal screw (73) and a nut (74). The second slot (22) is fixed to the coupling tube (64) by a hexagonal screw (73) and a nut (74).

3. The four-safety-clamp synchronous lifting mechanism according to claim 1, characterized in that: The inner wall of the coupling tube (64) is provided with anti-slip texture, and the contact surface between the coupling tube (64) and the long connecting shaft (2) is fixed by a tightening screw.

4. The four-safety-clamp synchronous lifting mechanism according to claim 1, characterized in that: The lower beam (1) is provided with a fixed bracket (58), and a return spring (11) is installed inside the fixed bracket (58). One end of the return spring (11) is connected to a horizontal tie rod (13).

5. The four-safety-clamp synchronous lifting mechanism according to claim 2, characterized in that: The safety clamp lifting handle (4) is fixed to the connecting bracket (66) by a shaft pin (68) and a cotter pin (70). The end of the connecting bracket (66) is connected to a screw (67). The screw (67) has left and right threads at both ends and is locked by a hexagonal nut.

6. The four-safety-clamp synchronous lifting mechanism according to claim 5, characterized in that: The screw (67) has a hexagonal head in the middle, which is used to adjust the installation position of the connecting bracket (66).

7. The four-safety-clamp synchronous lifting mechanism according to claim 4, characterized in that: It also includes a horizontal tie rod (7), the horizontal tie rod (13) is connected to the long connecting shaft (2) through the horizontal tie rod (7), the horizontal tie rod (7) is a U-shaped structure, and the two ends of the horizontal tie rod (7) are fixed by bolts.

8. A four-safety-clamp synchronous lifting mechanism according to claim 2, characterized in that: The wire rope handle (51) is connected to the elevator speed governor via the speed governor wire rope (54). The wire rope handle (51) is also connected to the long connecting shaft (2). When the elevator speed governor is activated, it lifts the wire rope handle (51) and synchronously drives the long connecting shaft (2) of the two sets of lower beams (1).

9. A four-safety-clamp synchronous lifting mechanism according to claim 1, characterized in that: Each safety clamp includes a safety clamp body (36), an elevator car frame column (49), and an elevator rail (55). The elevator car frame column (49) is fixedly connected to the safety clamp body (36), and the elevator rail (55) is arranged opposite to the elevator car frame column (49).

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