Elevator safety tongs with good braking effect

Abstract

The safety tongs for the elevator are good in braking effect. Relates to the technical field of elevators. The clamp comprises a clamp seat, a guide rail, a lifting plate and a brake mechanism. The guide rail penetrates through the clamp seat, the lifting plate is arranged above the clamp seat and is in sliding contact with the two sides of the clamp seat, and the brake mechanism is arranged in the clamp seat and is matched with the guide rail; the brake mechanism comprises two mounting frames, four mounting plates, four brake plates, a limiting assembly, a reset assembly and a transmission assembly, the two mounting frames are symmetrically arranged based on the guide rail, and the four mounting plates are fixedly mounted on the sides, close to the guide rail, of the corresponding mounting frames correspondingly; the number of the brake plates is the same as that of the mounting plates, and the brake plates are detachably mounted on the sides, close to the guide rails, of the corresponding mounting plates. The brake device has the advantages of being good in brake effect, rapid in reset, simple in structure, easy to maintain and the like, and the brake plate can be conveniently and rapidly disassembled, assembled and replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of elevators, in particular to a safety clamp for elevators with good braking effect. Background Art

[0002] With the development of modern high-rise buildings, elevators have become an indispensable means of transportation in people's daily lives. However, the safety of elevators has always been the focus of people's attention. During the operation of the elevator, the safety clamp is one of the important safety protection devices of the elevator. Its main function is to protect the safety of passengers and the elevator itself by braking the movement of the elevator when the elevator is overspeeding or out of control. Therefore, the research and development of elevator safety clamps with good braking effect has important practical significance and practical value.

[0003] At present, most of the elevator safety clamps on the market have problems such as unsatisfactory braking effect, slow reset speed, complex structure, and difficult maintenance. These problems not only affect the safety performance of the elevator, but also increase the operating cost and maintenance difficulty of the elevator. Therefore, how to design an elevator safety clamp with good braking effect, fast reset, simple structure, and easy maintenance has become an urgent problem to be solved in the current elevator industry. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a safety clamp for elevators with good braking effect, which solves the problems of unsatisfactory braking effect, slow resetting speed, complex structure and difficult maintenance of the existing safety clamps for elevators, improves the safety performance and operating efficiency of the elevator, and reduces the operating cost and maintenance difficulty of the elevator.

[0005] In order to solve the above technical problems, the utility model provides an elevator safety clamp with good braking effect, comprising: a clamp seat, a guide rail, a lifting plate and a braking mechanism;

[0006] The guide rail passes through the clamp seat, the lifting plate is arranged above the clamp seat and in sliding contact with both sides of the clamp seat, and the braking mechanism is arranged in the clamp seat and adapted to the guide rail;

[0007] The braking mechanism includes a mounting frame, a mounting plate, a brake plate, a limit assembly, a reset assembly and a transmission assembly. The number of the mounting frames is two and they are symmetrically arranged based on the guide rail. The number of the mounting plates is four and they are respectively fixedly mounted on the side of the corresponding mounting frame close to the guide rail. The number of the brake plates is the same as the number of the mounting plates and they are detachably mounted on the side of the corresponding mounting plate close to the guide rail. The transmission assembly is arranged in the clamp seat and is connected to the mounting frame and the lifting plate. The limit assembly is arranged on the transmission assembly and is adapted to the guide rail. Multiple springs are fixedly installed on the side of the two mounting frames close to each other, and the multiple springs are connected to the limit assembly. The reset assembly is arranged on the top of the clamp seat and is connected to the lifting plate.

[0008] Preferably, the transmission assembly includes two tooth plates 2, two tooth plates 1, two rotating shafts and two wide gears. Two rotating shafts parallel to each other are rotatably installed on the front and rear inner walls of the clamp seat. Wide gears are fixedly sleeved on the two rotating shafts. Tooth plates 2 are slidably installed on the inner walls on both sides of the clamp seat. The top ends of the two tooth plates 2 extend to the top of the clamp seat and are fixedly connected to the lifting plate. Tooth plates 1 are slidably installed on the inner walls on both sides of the clamp seat. The two tooth plates 1 and the two tooth plates 2 are respectively meshed with the corresponding wide gears, and the two tooth plates 1 are respectively slidably connected to the corresponding mounting frames.

[0009] Preferably, the limit assembly includes two limit plates and multiple limit blocks, a plurality of limit holes are opened on the guide rail at equal intervals, the two tooth plates are fixedly installed with limit plates on one end close to each other, and the two limit plates are fixedly installed with multiple limit blocks on one side close to each other, the limit blocks are adapted to the limit holes, and the multiple springs are fixedly connected to the corresponding limit plates at one end away from the mounting frame.

[0010] Preferably, the side of the limit block close to the guide rail is arranged in an arc surface.

[0011] Preferably, the reset assembly includes a plurality of springs 2, and the plurality of springs 2 are fixedly mounted on the top of the clamp seat, and the top ends of the plurality of springs 2 are fixedly connected to the lifting plate.

[0012] Preferably, a plurality of stoppers are fixedly mounted on a side of the mounting frame away from the guide rail.

[0013] Preferably, a plurality of lifting ears are fixedly mounted on the top of the lifting plate.

[0014] Preferably, a mounting groove is provided on one side of the mounting plate close to the guide rail, and the brake plate is snap-fitted and mounted in the mounting groove.

[0015] Compared with the related art, the elevator safety clamp with good braking effect provided by the utility model has the following beneficial effects:

[0016] The utility model provides a safety clamp for elevators with good braking effect. In an emergency situation where the elevator falls out of control, the lifting plate is moved close to the clamp seat through the reset component, and the limit component is moved close to the guide rail under the action of the transmission component, and multiple brake plates are first contacted with the guide rail to achieve deceleration, and then the limit component is limited in cooperation with the guide rail, thereby achieving safe braking. Due to the action of the reset component, when the elevator resumes normal operation, the lifting plate moves in a direction away from the clamp seat under the action of the second spring, so that the limit plate and the mounting frame move in a direction away from the guide rail under the action of the first tooth plate, the second tooth plate, the wide gear and the rotating shaft and the first spring, thereby releasing the brake, so that the device has the advantages of good braking effect, rapid reset, simple structure, easy maintenance, etc., and can effectively improve the safety and reliability of the elevator.

[0017] In addition, the brake plate of the utility model adopts a detachable installation method, which is convenient for the quick replacement and maintenance of the brake plate, and improves the maintenance efficiency of the safety clamp. At the same time, the limit block adopts an arc surface setting, which makes the limit block smoother when inserted into the limit hole, avoiding the occurrence of sticking. In addition, the block limits the mounting frame, avoiding the movement of the mounting frame from interfering with the normal operation of the wide gear, thereby ensuring the stability and reliability of the safety clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional structural schematic diagram of a preferred embodiment of an elevator safety clamp with good braking effect provided by the utility model;

[0019] Figure 2 For the utility model Figure 1 A schematic cross-sectional structure diagram of ;

[0020] Figure 3 It is a schematic diagram of a partial three-dimensional structure of the utility model.

[0021] Numbers in the figure: 1, clamp seat; 2, guide rail; 21, limit hole; 3, mounting frame; 301, stop block; 31, mounting plate; 32, brake plate; 33, tooth plate one; 34, limit plate; 341, limit block; 342, spring one; 35, rotating shaft; 36, wide gear; 37, tooth plate two; 38, spring two; 4, lifting plate. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0023] Please refer to Figure 1-3 ,in, Figure 1 A three-dimensional structural schematic diagram of a preferred embodiment of an elevator safety clamp with good braking effect provided by the utility model; Figure 2 For the utility model Figure 1 A schematic cross-sectional structure diagram of ; Figure 3The schematic diagram of the partial three-dimensional structure of the utility model. A safety clamp for elevators with good braking effect comprises: a clamp seat 1, a guide rail 2, a lifting plate 4, a mounting frame 3, a mounting plate 31, and a brake plate 32. The guide rail 2 passes through the clamp seat 1. The lifting plate 4 is arranged above the clamp seat 1 and in sliding contact with both sides of the clamp seat 1. The number of mounting frames 3 is two and they are symmetrically arranged based on the guide rail 2. The number of mounting plates 31 is four and they are respectively fixedly installed on the side of the corresponding mounting frame 3 close to the guide rail 2. The number of brake plates 32 is the same as the number of mounting plates 31 and they can be detachably installed on the side of the corresponding mounting plate 31 close to the guide rail 2. The clamp seat 1 Two rotating shafts 35 parallel to each other are rotatably installed on the inner walls on the front and rear sides, and wide gears 36 are fixedly sleeved on the two rotating shafts 35. Tooth plates 2 37 are slidably installed on the inner walls on both sides of the clamp seat 1. The top ends of the two tooth plates 2 37 extend to the top of the clamp seat 1 and are fixedly connected to the lifting plate 4. Tooth plates 1 33 are slidably installed on the inner walls on both sides of the clamp seat 1. The two tooth plates 1 33 and the two tooth plates 2 37 are respectively meshed with the corresponding wide gears 36, and the two tooth plates 1 33 are respectively slidably connected with the corresponding mounting frames 3, so that the lifting plate 4 can be upwardly moved by the steel cable. When the pulling force is applied, the end of the tooth plate 33 close to the guide rail 2 is controlled to be away from the guide rail 2. A plurality of limiting holes 21 are provided on the guide rail 2 at equal intervals. A limiting plate 34 is fixedly installed on the ends of the two tooth plates 33 close to each other. A plurality of limiting blocks 341 are fixedly installed on the sides of the two limiting plates 34 close to each other. The limiting blocks 341 are adapted to the limiting holes 21. A plurality of springs 342 are fixedly installed on the sides of the two mounting frames 3 close to each other. The ends of the plurality of springs 342 away from the mounting frames 3 are respectively fixedly connected to the corresponding limiting plates 34, which can be used to stop the brake plate 3. 2 provides braking and decelerates the clamp seat 1 to cooperate with the guide rail 2 for final limiting. A plurality of springs 2 38 are fixedly installed on the top of the clamp seat 1. The top ends of the plurality of springs 2 38 are fixedly connected to the lifting plate 4, so that the lifting plate 4 can move toward the direction close to the clamp seat 1 when the lifting plate 4 loses the tension of the steel cable, so that the limiting plate 34 can be controlled to move toward the direction close to the guide rail 2 under the cooperation of the tooth plate 2 37, the wide gear 36, the rotating shaft 35 and the tooth plate 1 33, and then the brake plate 32 can be first contacted with the guide rail 2 and decelerate and brake under the action of the spring 1 342.

[0024] In the above method, when the elevator falls out of control in an emergency, such as when the steel cable loses tension or breaks, the clamp seat fixed on the elevator car loses the tension of the steel cable, so that the lifting plate 4 moves toward the clamp seat 1 under the action of spring 2 38, and at the same time, the tooth plate 2 37 is controlled to drive the limit plate 34 toward the guide rail 2 through the cooperation of the wide gear 36 and the rotating shaft 35. At the same time, the mounting frame 3 drives the mounting plate 31 to make the brake plate 32 contact the guide rail 2 first and achieve deceleration. Then, the limit plate 34 drives the limit block 341 to approach the guide rail 2 and insert the limit block 341 into the corresponding limit hole to achieve the final limit, thereby achieving a safe braking effect.

[0025] When the elevator resumes normal operation, the lifting plate 4 moves upward due to the tension of the steel cable, causing the tooth plate 2 37 to move upward synchronously, thereby enabling the tooth plate 1 33 to move away from the guide rail 2. During this process, the limit block 341 is first disengaged from the limit hole, and then the clamping force between the brake plate 32 and the guide rail 2 is gradually reduced to complete disengagement, thereby releasing the brake, allowing the device to be reused.

[0026] In this embodiment, in order to facilitate the limiting block 341 to be inserted into the limiting hole 21 when the limiting plate 34 approaches the guide rail 2 , the side of the limiting block 341 close to the guide rail 2 is arranged in an arc surface.

[0027] In this embodiment, in order to provide a limit for the mounting frame 3 and prevent the movement of the mounting frame 3 from interfering with the normal operation of the wide gear 36 , a plurality of stoppers 301 are fixedly mounted on one side of the mounting frame 3 away from the guide rail 2 .

[0028] In this embodiment, in order to facilitate the connection and fixation between the steel cable and the lifting plate 4, a plurality of lifting ears are fixedly installed on the top of the lifting plate 4.

[0029] In this embodiment, in order to facilitate the quick disassembly and assembly of the brake plate 32 and improve the stability of the brake plate 32 after installation, a mounting groove is opened on one side of the mounting plate 31 close to the guide rail 2, and the brake plate 32 is snap-fitted and installed in the mounting groove.

[0030] The working principle of the elevator safety clamp with good braking effect provided by the utility model is as follows:

[0031] When an emergency situation occurs where the elevator falls out of control, for example, the steel cable loses tension or breaks, the clamp seat 1 fixed on the elevator car will lose the tension of the steel cable. At this time, the lifting plate 4 will move toward the clamp seat 1 under the action of the spring 2 38. The movement of the lifting plate 4 is through the interlocking mechanism of the tooth plate 2 37, the wide gear 36, the rotating shaft 35 and the tooth plate 1 33, so that the limit plate 34 moves toward the guide rail 2. At the same time, the mounting frame 3 drives the mounting plate 31 to make the brake plate 32 contact the guide rail 2 first to achieve deceleration. Then, the limit plate 34 drives the limit block 341 to approach the guide rail 2 and inserts the limit block 341 into the corresponding limit hole 21 to achieve the final limit, thereby achieving a safe braking effect.

[0032] When the elevator resumes normal operation, the lifting plate 4 moves upward due to the pulling force of the steel cable, which causes the tooth plate 2 37 to move upward synchronously. This movement causes the limit plate 34 to move away from the guide rail 2 through the tooth plate 1 33, and the limit block 341 first disengages from the limit hole 21. Then, the pressing force between the brake plate 32 and the guide rail 2 is gradually reduced to completely disengage, thereby releasing the brake, so that the device can be reused.

[0033] Compared with the related art, the elevator safety clamp with good braking effect provided by the utility model has the following beneficial effects:

[0034] The utility model provides an elevator safety clamp with good braking effect, which can quickly and effectively brake when the elevator falls out of control, protecting the safety of passengers and elevator equipment. At the same time, it has rapid reset, simple structure, and easy maintenance, which can greatly improve the safety and reliability of the elevator.

[0035] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A safety clamp for an elevator with good braking effect, comprising a clamp seat (1), a guide rail (2), a lifting plate (4) and a braking mechanism, characterized in that ； The guide rail (2) passes through the clamp seat (1), the lifting plate (4) is arranged above the clamp seat (1) and is in sliding contact with both sides of the clamp seat (1), and the braking mechanism is arranged in the clamp seat (1) and is adapted to the guide rail (2); The braking mechanism comprises a mounting frame (3), a mounting plate (31), a braking plate (32), a limiting assembly, a resetting assembly and a transmission assembly. The number of the mounting frames (3) is two and they are symmetrically arranged based on the guide rail (2). The number of the mounting plates (31) is four and they are respectively fixedly mounted on the side of the corresponding mounting frame (3) close to the guide rail (2). The number of the braking plates (32) is the same as the number of the mounting plates (31) and they are detachably mounted on the side of the corresponding mounting plate (31) close to the guide rail (2). The transmission assembly is arranged in the clamp seat (1) and is connected to the mounting frame (3) and the lifting plate (4). The limiting assembly is arranged on the transmission assembly and is compatible with the guide rail (2). A plurality of springs (342) are fixedly installed on the side of the two mounting frames (3) close to each other, and the plurality of springs (342) are connected to the limiting assembly. The resetting assembly is arranged on the top of the clamp seat (1) and is connected to the lifting plate (4).

2. The elevator safety clamp with good braking effect according to claim 1, characterized in that: The transmission assembly comprises two tooth plates (37), two tooth plates (33), two rotating shafts (35) and two wide gears (36). Two rotating shafts (35) are rotatably mounted on the inner walls on both sides of the front and rear sides of the clamp seat (1). The two rotating shafts (35) are fixedly sleeved with wide gears (36). Tooth plates (37) are slidably mounted on the inner walls on both sides of the clamp seat (1). The top ends of the two tooth plates (37) extend above the clamp seat (1) and are fixedly connected to the lifting plate (4). Tooth plates (33) are slidably mounted on the inner walls on both sides of the clamp seat (1). The two tooth plates (33) and the two tooth plates (37) are respectively meshed with the corresponding wide gears (36), and the two tooth plates (33) are respectively slidably connected to the corresponding mounting frames (3).

3. The elevator safety clamp with good braking effect according to claim 2, characterized in that: The limiting assembly comprises two limiting plates (34) and a plurality of limiting blocks (341); a plurality of limiting holes (21) are provided on the guide rail (2) at equal intervals; the two tooth plates (33) are fixedly mounted with the limiting plates (34) at their respective ends close to each other; the two limiting plates (34) are fixedly mounted with the plurality of limiting blocks (341) at their respective sides close to each other; the limiting blocks (341) are matched with the limiting holes (21); and the plurality of springs (342) are fixedly connected with the corresponding limiting plates (34) at their respective ends away from the mounting frame (3).

4. The elevator safety clamp with good braking effect according to claim 3, characterized in that: The side of the limit block (341) close to the guide rail (2) is arranged in the form of an arc surface.

5. The elevator safety clamp with good braking effect according to claim 1, characterized in that: The reset assembly comprises a plurality of springs (38), the top of the clamp seat (1) is fixedly mounted with the plurality of springs (38), and the top ends of the plurality of springs (38) are fixedly connected to the lifting plate (4).

6. The elevator safety clamp with good braking effect according to claim 1, characterized in that: A plurality of stoppers (301) are fixedly mounted on a side of the mounting frame (3) away from the guide rail (2).

7. The elevator safety clamp with good braking effect according to claim 1, characterized in that: A plurality of lifting ears are fixedly mounted on the top of the lifting plate (4).

8. The elevator safety clamp with good braking effect according to claim 1, characterized in that: A mounting groove is provided on one side of the mounting plate (31) close to the guide rail (2), and the brake plate (32) is snap-fitted and mounted in the mounting groove.

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