Elevator braking device

Abstract

The utility model relates to the technical field of elevators, in particular to an elevator braking device. The elevator braking device comprises a triggering unit, a transmission unit, a hydraulic unit and a braking unit, the triggering unit is installed in an elevator car handrail, one end of the transmission unit is connected with the triggering unit, the other end of the transmission unit is connected with the hydraulic unit, and the transmission unit is used for driving hydraulic oil in the hydraulic unit to output or flow back; the brake unit is communicated with the hydraulic unit, and the brake unit is configured to move in response to output or backflow of hydraulic oil in the hydraulic unit so as to clamp or release the elevator guide rail. The triggering unit drives the hydraulic unit through the transmission unit, and the hydraulic unit acts on the braking unit so that the braking unit can clamp the guide rail to achieve braking. A passenger can operate the active triggering brake device by himself / herself at the first time, so that the safety of the elevator is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of elevators, in particular to an elevator braking device. Background Art

[0002] With the increasing number of high-rise buildings, elevators have become an indispensable means of vertical transportation in people's daily lives. However, various faults may occur during the operation of elevators, such as loss of control and overspeed, which pose a serious threat to the safety of passengers.

[0003] Currently, most elevators are equipped with passive safety devices, such as safety clamps. When a stall detector detects that the elevator car's speed exceeds a specified limit, the safety clamps and other braking devices are triggered to brake the elevator car. However, these devices are passively triggered and require the elevator to malfunction before certain triggering conditions are met. This leads to a delay and even a small chance of failure. This leaves passengers passively awaiting rescue, without the ability to actively brake the elevator at the moment of a malfunction. Utility Model Content

[0004] In order to solve the above technical problems, the present invention provides an elevator braking device.

[0005] An elevator braking device comprises: a trigger unit, a transmission unit, a hydraulic unit and a braking unit, wherein the trigger unit is installed in the elevator car handrail, one end of the transmission unit is connected to the trigger unit, and the other end is connected to the hydraulic unit, the transmission unit is connected to the trigger unit to drive the hydraulic oil in the hydraulic unit to output or return; the braking unit is connected to the hydraulic unit, and the braking unit is configured to move in response to the output or return of the hydraulic oil in the hydraulic unit to clamp or release the elevator guide rail.

[0006] With this setup, the trigger unit is installed in the elevator car handrail, making it easy for passengers to operate the trigger unit. The trigger unit drives the hydraulic unit through the transmission unit, which in turn acts on the brake unit, causing it to clamp the guide rails to achieve braking. This way, passengers no longer need to wait for an emergency such as an elevator stall to trigger the elevator's passive protection mechanism. Instead, they can actively trigger the brake device on their own, thereby improving elevator safety.

[0007] In one embodiment, the braking unit includes a diverter and a brake, the hydraulic unit is connected to the input end of the diverter, and the output end of the diverter is connected to two output pipelines. The brake includes a first brake member and a second brake member, and the first brake member and the second brake member are respectively arranged on both sides of the elevator guide rail, and the two output pipelines respectively drive the first brake member and the second brake member to move toward each other to clamp the elevator guide rail or move away from each other to release the elevator guide rail.

[0008] In one embodiment, the brake further includes a shell having a slot for accommodating the first brake member and the second brake member, the first brake member and the second brake member are respectively located on both sides of the slot in a horizontal direction, the elevator guide rail passes through the slot and is located between the first brake member and the second brake member, and the first brake member and the second brake member are capable of moving in a horizontal direction toward the elevator guide rail.

[0009] In one embodiment, a first cavity and a second cavity are constructed in the shell, the first cavity is connected to the first output pipeline of the diverter through a first channel, and the first brake member is arranged on the side of the slot close to the first cavity, the second cavity is connected to the second output pipeline of the diverter through a second channel, and the second brake member is arranged on the side of the slot close to the second cavity.

[0010] In one embodiment, the first braking member includes a first moving portion and a first braking portion, the first moving portion and the first braking portion are connected, and the first moving portion is embedded in the first cavity and abuts against the inner wall of the first cavity;

[0011] The second braking member includes a second moving portion and a second braking portion, the second moving portion is connected to the second braking portion, and the second moving portion is embedded in the second cavity and abuts against the inner wall of the second cavity.

[0012] In one embodiment, the side walls of the slot are respectively adapted to the shapes of the first brake member and the second brake member;

[0013] The facing ends of the first brake member and the second brake member are both provided with rough surfaces, and the opposite ends of the first brake member and the second brake member have inclined side walls gradually inclined toward the guide rail from the middle to both ends along the vertical direction.

[0014] In one embodiment, the trigger unit includes a pull rod, and the transmission unit includes a transmission rope and a transmission rod, one end of the transmission rod is used to be rotatably connected to the elevator car, and the other end is connected to the pull rod through the transmission rope;

[0015] One end of the hydraulic unit abuts against the transmission rod and can be triggered in response to the rotation of the transmission rod.

[0016] In one embodiment, the trigger unit further includes a shield, which is rotatably connected to the elevator car handrail so that the pull rod is concealed in the shield or exposed.

[0017] In one embodiment, the transmission unit also includes a gravity member, one end of the transmission rod used to connect to the elevator car handrail is a connecting end, and the other end is a rotating end, and the gravity member is connected to the connecting end to provide a driving force for returning the hydraulic oil to the hydraulic unit.

[0018] In one embodiment, the transmission unit further includes at least two fixed pulleys, which are spaced apart along the extension direction of the transmission rope, and part of the transmission rope is wound around the fixed pulleys, one of the fixed pulleys is located in the elevator car handrail, and the other fixed pulley is located on the side of the elevator car wall away from the elevator car handrail, and the hydraulic unit is also located on the side of the elevator car wall away from the elevator car handrail.

[0019] In one embodiment, the hydraulic unit includes a support block, a piston and a hydraulic cylinder. One end of the support block is connected to the transmission unit, and the other end is connected to the piston. The piston is driven by the transmission unit to squeeze or expand the hydraulic cylinder to drive the hydraulic oil in the hydraulic cylinder to output or return.

[0020] Compared to existing technologies, this utility model improves elevator safety by providing an active trigger unit that allows passengers to actively brake the elevator car in the event of an emergency. Furthermore, the various components are simple to connect, making subsequent disassembly and maintenance more convenient, cost-effective, and applicable to a wider range of situations. The structure of the brake unit's housing, first brake member, and second brake member is optimized, ensuring that after the first and second brake members clamp the elevator guide rails, they clamp increasingly tighter as the elevator car moves upward or downward, further enhancing elevator safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a portion of the structure of a trigger unit of one embodiment of the elevator braking device provided by the present invention;

[0022] Figure 2 A schematic diagram of the partial structure of a trigger unit and a hydraulic unit of one embodiment of the elevator braking device provided by the present utility model;

[0023] Figure 3This is a structural schematic diagram of the brake unit of one embodiment of the elevator brake device provided by the present invention in the middle position;

[0024] Figure 4 This is a structural schematic diagram of a brake unit in an upper limit position in one embodiment of the elevator brake device provided by the present invention;

[0025] Figure 5 This is a structural schematic diagram of a brake unit in one embodiment of the elevator brake device provided by the present invention in the lower limit position;

[0026] Figure 6 A cross-sectional view of the structure of an elevator car handrail including one embodiment of the elevator braking device provided by the present utility model;

[0027] Figure 7 A cross-sectional view of a brake unit of one embodiment of the elevator brake device provided by the present invention;

[0028] Figure 8 This is a structural schematic diagram of the elevator braking device provided by the utility model applied to an elevator car.

[0029] The symbols in the figure mean the following:

[0030] 100. Elevator braking device; 10. Trigger unit; 11. Pull rod; 20. Transmission unit; 21. Transmission rope; 22. Transmission rod; 23. Shield; 24. Gravity member; 25. Fixed pulley; 30. Hydraulic unit; 31. Support block; 32. Piston; 33. Hydraulic cylinder; 34. Oil pipeline; 40. Braking unit; 401. Diverter; 402. Brake; 41. Housing; 42. First braking member; 421. First moving part; 422. First braking part; 43. Second braking member; 431. Second moving part; 432. Second braking part; 44. Slot; 441. Guide rail channel; 45. First cavity; 451. First channel; 46. Second cavity; 461. Second channel; 47. Brake groove; 101. Elevator car handrail; 102. Elevator guide rail. DETAILED DESCRIPTION

[0031] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0032] It should be noted that when a mechanism is referred to as being "fixed to" or "set on" another mechanism, it may be directly on the other mechanism or there may be a central mechanism. When a mechanism is considered to be "connected to" another mechanism, it may be directly connected to the other mechanism or there may be a central mechanism at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0034] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.

[0036] See Figures 1-8 The utility model provides an elevator braking device 100, which is applied to an elevator car handrail 101. When an emergency occurs in the elevator car, passengers can actively brake the elevator car in the first time in the elevator car, thereby improving the safety of elevator operation.

[0037] See Figure 1 、 Figure 2 as well as Figure 8The elevator braking device 100 includes a trigger unit 10, a transmission unit 20, a hydraulic unit 30, and a brake unit 40. The trigger unit 10 is installed in the elevator car handrail 101. The transmission unit 20 is connected to the trigger unit 10 at one end and to the hydraulic unit 30 at the other end. The transmission unit 20 and the trigger unit 10 are in transmission connection, driving the hydraulic oil in the hydraulic unit 30 to be discharged or returned. The brake unit 40 is in communication with the hydraulic unit 30 and is configured to clamp the elevator guide rail 102 in response to the discharge or return of hydraulic oil from the hydraulic unit 30. As such, the trigger unit 10 is installed in the elevator car handrail 101, making it easy for passengers to operate the trigger unit 10. The trigger unit 10 drives the hydraulic unit 30 through the transmission unit 20, which in turn acts on the brake unit 40, causing it to clamp the guide rail to achieve braking. This eliminates the need for passengers to wait for an emergency such as an elevator stall to trigger the elevator's passive protection mechanism. Instead, passengers can actively trigger the brake device on their own, achieving instantaneous active braking, thereby improving elevator safety.

[0038] Specifically, brake unit 40 includes a flow divider 401 and a brake 402. Hydraulic unit 30 is connected to the input of flow divider 401. The output of flow divider 401 is connected to two output pipelines. Brake 402 includes a first brake member 42 and a second brake member 43, which are positioned on either side of the elevator guide rail. The two output pipelines respectively drive the first brake member 42 and the second brake member 43 to move toward each other to clamp the elevator guide rail, or to move away from each other to release the elevator guide rail. Hydraulic oil output from hydraulic unit 30 is distributed through flow divider 401 to the two output pipelines, which respectively drive the first brake member 42 and the second brake member 43 to move, respectively, to achieve braking.

[0039] Brake 402 also includes a housing 41 having a slot 44 for accommodating a first brake member 42 and a second brake member 43. The first brake member 42 and the second brake member 43 are mounted on either side of the slot 44 in a horizontal direction. The elevator guide rail 102 passes through the slot 44 and is positioned between the first brake member 42 and the second brake member 43. The first brake member 42 and the second brake member 43 are capable of moving horizontally toward the elevator guide rail. The elevator guide rail 102 is positioned in the middle of the slot 44. When the brake unit 40 needs to clamp the elevator guide rail 102, the first brake member 42 and the second brake member 43 simultaneously move toward the elevator guide rail 102, contacting the guide rail 102 and generating friction, thereby completing the braking action.

[0040] See Figure 7In this embodiment, the slot 44 is opened in the middle position of the shell 41, and the first brake member 42 and the second brake member 43 are symmetrically arranged on both sides of the slot 44 so that the two are synchronized during the movement. During the braking process, the force on the elevator guide rail 102 and the brake unit 40 is also more balanced.

[0041] See Figure 3-Figure 5 To drive the movement of the first brake member 42 and the second brake member 43, a first chamber 45 and a second chamber 46 are configured within the housing 41. The first chamber 45 communicates with the first output pipeline of the diverter 401 via a first channel 451. The first brake member 42 is disposed on the side of the slot 44 near the first chamber 45. The second chamber 46 communicates with the second output pipeline of the diverter 401 via a second channel 461. The second brake member 43 is disposed on the side of the second chamber 46. Therefore, when the hydraulic unit 30 is activated, hydraulic oil is injected into the first chamber 45 via the first channel 451 and into the second chamber 46 via the second channel 461, thereby applying pressure to the first brake member 42 and the second brake member 43, causing them to move toward the center of the slot 44 (i.e., the elevator guide rail 102 located in the slot 44), thereby clamping the elevator guide rail 102 and achieving braking.

[0042] Furthermore, the first brake member 42 includes a first movable portion 421 and a first brake portion 422, which are connected to each other and embedded in the first cavity 45 and abut against the inner wall of the first cavity 45. The second brake member 43 includes a second movable portion 431 and a second brake portion 432, which are connected to each other and embedded in the second cavity 46 and abut against the inner wall of the second cavity 46. As a result, the abutment between the first movable portion 421 and the inner wall of the first cavity 45 allows the hydraulic oil in the first cavity 45 to better act on the first movable portion 421 and prevents the hydraulic oil in the first cavity 45 from leaking into the groove 44. When the hydraulic oil pushes the first movable portion 421, the first movable portion 421 drives the first brake portion 422 to move toward the elevator guide rail 102. Similarly, the second brake portion 432 also simultaneously contacts and clamps the elevator guide rail 102.

[0043] The sidewalls of the slot 44 are adapted to the shapes of the first and second brake members 42 and 43, respectively. In this embodiment, the diameter of the first movable portion 421 is smaller than that of the first brake member 422. The cross-sectional shapes of the first movable portion 421 and the first cavity 45 are adapted to each other, either rectangular or circular, as long as they fit snugly to prevent hydraulic oil leakage. Similarly, the diameter of the second movable portion 431 is also smaller than that of the second brake member 432. Furthermore, the larger areas of the first and second brake members 422 and 432 increase their contact area with the elevator guide rail 102, thereby enhancing friction and braking effectiveness.

[0044] Preferably, the first movable portion 421 and the first braking portion 422 are connected via a slot, wherein a slot is provided on the surface of one of the movable portions, and a protrusion is provided on the surface of the other, and the protrusion engages with the slot to achieve the connection between the first movable portion 421 and the first braking portion 422. Similarly, the second movable portion 431 and the second braking portion 432 are connected in the same manner.

[0045] Specifically, in order to further improve the braking effect of the first braking part 422 and the second braking part 432, rough protrusions are provided on the side of the first braking part 422 facing the elevator guide rail 102 and the side of the second braking part 432 facing the elevator guide rail 102, thereby increasing the friction between the two and the elevator guide rail 102.

[0046] The slots 44 include a guide rail channel 441 for the elevator guide rail to pass through and a brake slot 47 . The brake slots 47 are opened on both sides of the guide rail channel 441 and are symmetrically arranged, and both brake slots 47 face the guide rail channel 441 .

[0047] In this embodiment, the first brake portion 422 and the second brake portion 432 are respectively disposed in two brake grooves 47 and are clearance-fitted with the brake grooves 47. The first brake member 42 and the second brake member 43 form inclined sidewalls that gradually slope toward the guide rail from the middle portion to the ends in the vertical direction. The brake grooves 47 are used to mount the first brake portion 422 and the second brake portion 432. Since the first brake portion 422 and the second brake portion 432 are clearance-fitted with the corresponding brake grooves 47, when the first brake portion 422 and the second brake portion 432 clamp the elevator guide rail 102, regardless of whether the elevator car is moving upward or downward, the first brake portion 422 and the second brake portion 432 will be displaced a certain amount. The displacement distance is the clearance width of the clearance fit. When the first brake portion 422 and the second brake portion 432 have completed their movement, they will abut against the brake grooves 47. Therefore, both ends of the brake groove 47 in the vertical direction are inclined toward the guide rail channel 441. In other words, the bottom of the brake groove 47 gradually approaches the guide rail channel 441 (that is, gradually approaches the elevator guide rail 102) along the direction from the middle to the ends. Therefore, as the first brake portion 422 and the second brake portion 432 abut against the brake groove 47, the first brake portion 422 and the second brake portion 432 will also get closer to the elevator guide rail 102 as the elevator car moves, and the clamping force of the first brake portion 422 and the second brake portion 432 on the elevator guide rail 102 will be greater. In order to adapt to the inclined groove bottom structure of the brake groove 47, the first brake portion 422 and the second brake portion 432 have an inclined surface on the side facing away from the guide rail channel 441. The inclined surface abuts and cooperates with the groove bottom of the inclined brake groove 47, thereby guiding the movement of the first brake portion 422 and the second brake portion 432.

[0048] The trigger unit 10 includes a pull rod 11, and the transmission unit 20 includes a transmission rope 21 and a transmission rod 22. One end of the transmission rod 22 is rotatably connected to the elevator car, and the other end is connected to the pull rod 11 via the transmission rope 21. One end of the hydraulic unit 30 abuts the transmission rod 22 and can be triggered in response to the rotation of the transmission rod 22. In this way, when a passenger pulls the pull rod 11, the transmission rope 21 can drive the pull rod 11 to rotate, causing the pull rod 11 to rotate under the force and triggering the hydraulic unit 30 to operate.

[0049] In this embodiment, the transmission rope 21 is configured as a steel wire rope, which has high strength and good durability.

[0050] To prevent the lever 11 from being accidentally touched during normal elevator operation, the trigger unit 10 also includes a protective cover 23. The protective cover 23 is rotatably connected to the elevator handrail 101, allowing the lever 11 to be concealed within the protective cover 23 or exposed. During normal elevator operation, the protective cover 23 isolates the lever 11 from the external environment, preventing passengers from accidentally touching the lever 11 and reducing the ingress of dust and impurities into the elevator handrail 101, which could affect the device's operation. When the protective cover 23 is opened, the lever 11 is exposed for easy access by passengers.

[0051] See Figure 6 In this embodiment, the protective cover 23 is set as a glass cover, which is more beautiful and allows the internal structure to be observed intuitively.

[0052] The transmission unit 20 also includes a weight member 24. The transmission rod 22 has one end connected to the elevator car handrail 101 as a connection end, and the other end as a rotating end. The weight member 24 is connected to the connection end and is used to provide a driving force for returning the hydraulic oil to the hydraulic unit 30. Thus, when the elevator braking device 100 is no longer in use, the operator only needs to move the elevator car in the opposite direction of braking. This will cause the transmission rod 22 to move in the opposite direction under the action of the weight member 24, and the hydraulic oil in the first chamber 45 and the second chamber 46 will be pumped back into the hydraulic unit 30 through the first channel 451 and the second channel 461. At this time, the first brake member 42 and the second brake member 43 will move away from each other, thereby releasing the brake on the elevator guide rail 102.

[0053] In this embodiment, the gravity member 24 is a metal weight. In other embodiments, the gravity member 24 may also be other structures that can reset the transmission rod 22 by its own weight.

[0054] Furthermore, the pull rod 11 is installed in the elevator car handrail 101, while the transmission rod 22, hydraulic unit 30, and brake unit 40 are arranged between the inner and outer walls of the elevator car or outside the elevator car. Therefore, in order to enable the pull rod 11 to drive and control the brake unit 40 located outside the elevator car, the transmission unit 20 provided in this embodiment also includes at least two fixed pulleys 25, one of which is located in the elevator car handrail 101 and the other is located on the side of the elevator car facing away from the elevator car handrail 101. The hydraulic unit 30 is also located on the side of the elevator car facing away from the elevator car handrail 101. The two fixed pulleys 25 are arranged at intervals along the extension direction of the transmission rope 21, and part of the transmission rope 21 is wound around the fixed pulleys 25, so that the transmission rope 21 can extend from the pull rod 11 to the transmission rod 22 and change direction at least twice, thereby avoiding the elevator car handrail 101 and other structures to prevent interference.

[0055] In this embodiment, the two fixed pulleys 25 are located on the same horizontal line, so the transmission rope 21 changes direction twice at an angle of 90°, thereby adapting to the elevator handrail set as a right-angle structure and extending between the inner and outer walls of the elevator car.

[0056] In other embodiments, if the elevator car handrail 101 has a structure of other shapes, the location of the fixed pulley 25 can also be changed accordingly, thereby changing the final extension direction of the transmission rope 21.

[0057] The hydraulic unit 30 includes a support block 31, a piston 32, and a hydraulic cylinder 33. One end of the support block 31 is connected to the transmission unit 20, and the other end is connected to the piston 32. The piston 32 and the hydraulic cylinder 33 work in concert, squeezing or expanding the hydraulic cylinder 33 under the influence of the transmission unit 20, thereby forcing the hydraulic oil in the hydraulic cylinder 33 to flow out or back out. The hydraulic cylinder 33 is connected to the brake unit 40 via an oil pipeline 34. Thus, movement of the transmission unit 20 (i.e., the transmission rod 22) simultaneously moves the support block 31. The support block 31 drives the piston 32 to squeeze the interior of the hydraulic cylinder 33, forcing the hydraulic oil in the hydraulic cylinder 33 out of the hydraulic cylinder 33 and into the brake unit 40 through the oil pipeline 34. As described above, the hydraulic oil enters the first chamber 45 through the first channel 451 and the second chamber 46 through the second channel 461, respectively, thereby driving the first brake member 42 and the second brake member 43.

[0058] Compared to existing technologies, the present invention improves elevator safety by providing an active trigger unit 10, allowing passengers to actively brake the elevator car in the event of an emergency. Furthermore, the various components are simple to connect, making subsequent disassembly and maintenance more convenient, cost-effective, and widely applicable. The structures of the housing 41, first brake member 42, and second brake member 43 within the brake unit 40 are optimized, ensuring that after the first and second brake members 42, 43 clamp the elevator guide rail 102, they clamp increasingly tighter as the elevator car moves upward or downward, further improving elevator safety.

[0059] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. An elevator braking device, characterized in that: include: A trigger unit (10), a transmission unit (20), a hydraulic unit (30) and a brake unit (40), The trigger unit (10) is installed in the elevator car handrail (101). One end of the transmission unit (20) is connected to the trigger unit (10), and the other end is connected to the hydraulic unit (30), and the transmission unit (20) is in transmission connection with the trigger unit (10) to drive the hydraulic oil in the hydraulic unit (30) to output or return; The brake unit (40) is in communication with the hydraulic unit (30), and is configured to move in response to output or return of hydraulic oil in the hydraulic unit (30) to clamp or release the elevator guide rail (102).

2. The elevator braking device according to claim 1, characterized in that: The brake unit (40) includes a diverter (401) and a brake (402), the hydraulic unit (30) is communicated with the input end of the diverter (401), the output end of the diverter (401) is connected to two output pipelines, the brake (402) includes a first brake member (42) and a second brake member (43), the first brake member (42) and the second brake member (43) are respectively arranged on both sides of the elevator guide rail, and the two output pipelines respectively drive the first brake member (42) and the second brake member (43) to move toward each other to clamp the elevator guide rail or to move away from each other to release the elevator guide rail.

3. The elevator braking device according to claim 2, characterized in that: The brake (402) further includes a housing (41), the housing (41) having a slot (44) for accommodating the first brake member (42) and the second brake member (43), the first brake member (42) and the second brake member (43) being respectively located on both sides of the slot (44) in a horizontal direction, the elevator guide rail passing through the slot (44) and being located between the first brake member (42) and the second brake member (43), the first brake member (42) and the second brake member (43) being able to move in a horizontal direction toward the elevator guide rail.

4. The elevator braking device according to claim 3, characterized in that: A first chamber (45) and a second chamber (46) are constructed in the shell (41); the first chamber (45) is connected to the first output pipeline of the diverter (401) through a first channel (451), and the first brake member (42) is arranged on a side of the slot (44) close to the first chamber (45); the second chamber (46) is connected to the second output pipeline of the diverter (401) through a second channel (461), and the second brake member (43) is arranged on a side of the slot (44) close to the second chamber (46).

5. The elevator braking device according to claim 4, characterized in that: The first braking member (42) includes a first moving portion (421) and a first braking portion (422), wherein the first moving portion (421) and the first braking portion (422) are connected, and the first moving portion (421) is embedded in the first cavity (45) and abuts against the inner wall of the first cavity (45); The second braking member (43) includes a second moving portion (431) and a second braking portion (432), the second moving portion (431) and the second braking portion (432) are connected, and the second moving portion (431) is embedded in the second cavity (46) and abuts against the inner wall of the second cavity (46).

6. The elevator braking device according to claim 3, characterized in that: The side walls of the slot (44) are respectively adapted to the shapes of the first brake member (42) and the second brake member (43); The facing ends of the first brake member (42) and the second brake member (43) are both provided with rough surfaces, and the opposite ends of the first brake member (42) and the second brake member (43) have inclined side walls that gradually incline toward the guide rail from the middle to the two ends in the vertical direction.

7. The elevator braking device according to claim 1, characterized in that: The trigger unit (10) includes a pull rod (11), and the transmission unit (20) includes a transmission rope (21) and a transmission rod (22), one end of the transmission rod (22) is used for rotationally connecting with the elevator car, and the other end is connected to the pull rod (11) through the transmission rope (21); One end of the hydraulic unit (30) abuts against the transmission rod (22) and can be triggered in response to the rotation of the transmission rod (22).

8. The elevator braking device according to claim 7, characterized in that: The trigger unit (10) further includes a shield (23), which is rotatably connected to the elevator car handrail (101) so that the pull rod (11) is shielded in the shield (23) or the pull rod (11) is exposed.

9. The elevator braking device according to claim 7, characterized in that: The transmission unit (20) further includes a weight member (24), one end of the transmission rod (22) for connecting to the elevator car handrail (101) is a connecting end, and the other end is a rotating end, and the weight member (24) is connected to the connecting end and is used to provide a driving force for returning hydraulic oil to the hydraulic unit (30).

10. The elevator braking device according to claim 7, characterized in that: The transmission unit (20) further includes at least two fixed pulleys (25), the two fixed pulleys (25) being spaced apart along the extending direction of the transmission rope (21), and part of the transmission rope (21) being wound around the fixed pulleys (25), one of the fixed pulleys (25) being located in the elevator car handrail (101), and the other fixed pulley (25) being located on a side of the elevator car wall away from the elevator car handrail (101), and the hydraulic unit (30) being also located on a side of the elevator car wall away from the elevator car handrail (101).

11. The elevator braking device according to claim 1, characterized in that: The hydraulic unit (30) comprises a support block (31), a piston (32) and a hydraulic cylinder (33). One end of the support block (31) is connected to the transmission unit (20), and the other end is connected to the piston (32). Driven by the transmission unit (20), the piston (32) squeezes or expands the hydraulic cylinder (33) to drive the hydraulic oil in the hydraulic cylinder (33) to be output or refluxed.

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