A pulling mechanism

Abstract

The application relates to the technical field of elevator safety devices, and relates to a lifting mechanism, which comprises a shell, a pressing plate, a lifting rope, an electromagnet and a reset assembly, the shell is arranged on an elevator bridge box for lifting, the pressing plate is arranged in the shell in a sliding mode through the reset assembly, one end of the lifting rope is connected with the pressing plate and the other end is connected with a safety gear for braking; the electromagnet is arranged on the shell, and the reset assembly is in a force storage state when the electromagnet adsorbs the pressing plate. The application has the effect of reducing maintenance difficulty.

Description

Technical Field

[0001] This application relates to the technical field of elevator safety devices, and in particular to a lifting mechanism. Background Technology

[0002] The elevator speed governor-safety brake system is a crucial safety protection device in elevators. When the elevator car overspeeds or falls due to a broken rope, this system can quickly activate and stop the car on the guide rails, ensuring the safety of the passengers.

[0003] Traditional speed governor-safety gear systems typically employ a mechanical lever linkage mechanism. Its working principle is as follows: after the speed governor actuates, it pulls the lever mechanism via a wire rope. The lever mechanism then transmits the increased force to the safety gear, triggering the safety gear wedge to clamp the guide rail, creating friction between the safety gear and the guide rail. Furthermore, the speed governor is generally installed at the top of the hoistway, while the safety gear is located on the bridge gearbox.

[0004] There are many types of mechanical lever linkage structures, which make maintenance quite difficult. Utility Model Content

[0005] To reduce maintenance difficulty, this application provides a lifting mechanism.

[0006] The lifting mechanism provided in this application adopts the following technical solution: A lifting mechanism includes a housing, a pressure plate, a lifting rope, an electromagnet, and a reset assembly. The housing is located on an elevator car for lifting and lowering. The pressure plate is slidably disposed within the housing via the reset assembly. One end of the lifting rope is connected to the pressure plate, and the other end is connected to a safety clamp for braking. The electromagnet is disposed on the housing, and the reset assembly is in a charged state when the electromagnet attracts the pressure plate.

[0007] By adopting the above technical solution, when the elevator overspeeds, the electromagnet no longer attracts the pressure plate, the reset component drives the pressure plate to move, the pressure plate drives the lifting rope to move, and the lifting rope will brake the safety gear. Because the housing is set on the bridge box, and the safety gear is generally also located on the bridge box, the phenomenon of occupying shaft space can be reduced, and it is also easier to maintain than the lever-type structure. Therefore, the lifting mechanism set in this application reduces the difficulty of maintenance, reduces the phenomenon of occupying a large shaft space, and is easy to install and debug.

[0008] Optionally, the reset assembly includes a push rod spring, one end of which is connected to the pressure plate and the other end of which is connected to the housing. When the electromagnet attracts the pressure plate, the push rod spring is in a deformed state.

[0009] By adopting the above technical solution, when the elevator is running normally, the electromagnet is energized and attracts the pressure plate, and the push rod spring is in a state of deformation and storage. When the elevator overspeeds, the electromagnet is de-energized, the electromagnet no longer attracts the pressure plate, and the force of the push rod spring restoring its elastic deformation drives the pressure plate to move, and the pressure plate will drive the lifting rope to move.

[0010] Optionally, a limiting component is provided on the housing, the limiting component including a fixing plate and a fixing post, the fixing plate being disposed on the housing, one end of the fixing post being connected to the fixing plate and the other end being connected to the housing; a first through hole is provided on the pressure plate for the fixing post to pass through.

[0011] By adopting the above technical solution, when the push rod spring recovers its elastic deformation and drives the pressure plate to move, the pressure plate slides on the fixed column, and the fixed column limits the movement path of the pressure plate, thereby making the lifting rope drive the safety clamp to work better.

[0012] Optionally, the pressure plate is provided with a connecting mechanism connected to the lifting rope. The connecting mechanism includes a first connecting block, a second connecting block, a first connecting component, and a second connecting component. The first connecting block is disposed on the pressure plate through the first connecting component, the second connecting block is fixedly disposed on the first connecting block, and the lifting rope is disposed on the second connecting block through the second connecting component.

[0013] By adopting the above technical solution, the first connecting block is connected to the pressure plate through the first connecting component, and the end of the lifting rope away from the safety clamp is connected to the second connecting block through the second connecting component; when the pressure plate moves, the pressure plate drives the first connecting block to move, and the second connecting block on the first connecting block drives the lifting rope to move through the second connecting component.

[0014] Optionally, the first connecting assembly includes a first connecting bolt and a first connecting nut. The pressure plate has a second through hole, and the first connecting block has a third through hole. The end of the first connecting bolt away from its own nut passes through the third through hole and the second through hole in sequence. The first connecting nut is threadedly connected to the first connecting bolt. The first connecting nut abuts against the pressure plate, and the nut of the first connecting bolt abuts against the first connecting block.

[0015] By adopting the above technical solution, the end of the first connecting bolt away from its own nut passes through the third through hole and the second through hole in sequence. Then, the first connecting nut is threadedly connected to the first connecting bolt, and the nut of the first connecting bolt is pressed against the first connecting block, and the first connecting nut is pressed against the pressure plate. The structure of the first connecting assembly is simple and easy to operate.

[0016] Optionally, the second connecting assembly includes a second connecting bolt and a second connecting nut. A fourth through hole is provided on the second connecting block. A fifth through hole is provided at the end of the second connecting bolt near its own nut. A sixth through hole is provided on the pressure plate. One end of the lifting rope passes through the sixth through hole and the fifth through hole. The end of the second connecting bolt away from its own nut passes through the fourth through hole. The second connecting nut is threadedly connected to the second connecting bolt passing through the fourth through hole, and the second connecting nut abuts against the second connecting block.

[0017] By adopting the above technical solution, the end of the lifting rope away from the safety clamp passes through the sixth through hole on the pressure plate and the fifth through hole on the second connecting bolt; then the end of the second connecting bolt away from the nut passes through the fourth through hole, and the second connecting nut is threadedly connected to the second connecting bolt passing through the fourth through hole, and the second connecting nut abuts against the second connecting block, thereby realizing the connection between the lifting rope and the second connecting block.

[0018] Optionally, the housing is provided with a pushing assembly, which includes a support frame and an electric push rod. The support frame is disposed on the housing, and the electric push rod is disposed on the support frame. The electric push rod can drive the pressure plate to move.

[0019] By adopting the above technical solution, when the elevator is overspeeding, the pressure plate will no longer be attracted by the electromagnet; after the elevator overspeeding repair is completed, the electric push rod is activated, and the push rod of the electric push rod drives the pressure plate to move closer to the electromagnet, so that the electromagnet can re-attract the pressure plate; and after the electromagnet attracts the pressure plate, the push rod of the electric push rod returns to its original position and no longer resists the pressure plate.

[0020] Optionally, a position sensor is provided on the housing, which is used to detect the position of the pressure plate.

[0021] By adopting the above technical solution and setting up a positioning sensor, it is possible to confirm in real time whether the electromagnet and the pressure plate are in complete contact or have reached the predetermined position, thus avoiding the risk of the object falling off due to incomplete adsorption.

[0022] Optionally, the housing includes a safety circuit switching mechanism comprising a contact block and a switch block. The contact block is disposed on the pressure plate, and the switch block is disposed on the housing. The switch block is capable of abutting against the contact block.

[0023] By adopting the above technical solution, the elevator will only move normally when the touch block abuts against the switch block; the elevator cannot be started when the touch block does not abut against the switch block.

[0024] Optionally, a guide assembly is formed on the housing, the guide assembly including a third connecting bolt and a third connecting nut, a seventh through hole is provided on the housing, one end of the third connecting bolt passes through the seventh through hole; two third connecting nuts are provided, both of which are threadedly connected to the third connecting bolt, and both of the third connecting nuts abut against the side wall of the housing; an eighth through hole is provided on the third connecting bolt for the lifting rope to pass through.

[0025] By adopting the above technical solution, when the pressure plate drives the lifting rope to move, the lifting rope will move in the eighth through hole of the third connecting bolt. Therefore, the third connecting bolt can limit and guide the lifting rope.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The lifting mechanism provided in this application reduces maintenance difficulty, minimizes the need for large amounts of shaft space, and facilitates installation and commissioning; 2. The set limiting components limit the movement path of the pressure plate, thereby making the lifting rope drive the safety clamp to work better. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the lifting mechanism in the embodiments of this application; Figure 2 This is a schematic diagram of the structure of the driving component in the embodiments of this application; Figure 3 This is a schematic diagram of the structure of the defined components in the embodiments of this application; Figure 4 This is a schematic diagram of the connecting mechanism in the embodiments of this application; Figure 5 This is a schematic diagram of the structure of the first connecting component in an embodiment of this application.

[0028] Reference numerals: 11. Housing; 111. Bottom block; 1111. Bottom plate; 1112. Side plate; 1113. Connecting plate; 112. Top block; 12. Pressure plate; 121. First through hole; 122. Sixth through hole; 13. Lifting rope; 14. Electromagnet; 15. Push rod spring; 2. Limiting assembly; 21. Fixing plate; 22. Fixing column; 23. Fourth connecting bolt; 3. Connecting mechanism; 31. First connecting block; 32. Second connecting block; 33. First connecting assembly; 331. First connecting bolt 332. First connecting nut; 34. Second connecting assembly; 341. Second connecting bolt; 3411. Fifth through hole; 342. Second connecting nut; 4. Push assembly; 41. Support frame; 42. Electric push rod; 5. Position sensor; 6. Safety circuit switch mechanism; 61. Contact block; 62. Switch block; 63. Mounting assembly; 631. Mounting plate; 632. Fifth connecting bolt; 7. Guide assembly; 71. Third connecting bolt; 711. Eighth through hole; 72. Third connecting nut. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0030] This application discloses a lifting mechanism.

[0031] refer to Figure 1 and Figure 2 A lifting mechanism includes a housing 11, a pressure plate 12 is provided inside the housing 11, a connecting mechanism 3 is provided on the pressure plate 12, and a lifting rope 13 is connected to the connecting mechanism 3.

[0032] refer to Figure 1 and Figure 2 The housing 11 includes a bottom block 111 connected to the elevator car. The bottom block 111 includes a bottom plate 1111. A side plate 1112 is integrally provided on the bottom plate 1111. The side plate 1112 is U-shaped. A connecting plate 1113 is integrally provided on the bottom plate 1111. The connecting plate 1113 is located at the notch of the side plate 1112. A top block 112 is provided on the side of the side plate 1112 away from the bottom plate 1111. The connecting plate 1113 is also connected to the top block 112.

[0033] refer to Figure 2 and Figure 3A connecting assembly is provided on the base plate 1111. The connecting assembly includes an L-shaped fixing plate 21 connected to the base plate 1111. A fixing post 22 is placed between the fixing plate 21 and the connecting plate 1113. One end of the fixing post 22 abuts against the fixing plate 21 and the other end abuts against the connecting plate 1113. Both ends of the fixing post 22 are provided with first threaded holes. Both the fixing plate 21 and the connecting plate 1113 are provided with ninth through holes. Both the fixing plate 21 and the connecting plate 1113 are provided with fourth connecting bolts 23. The fourth connecting bolts 23 pass through the ninth through holes and are threadedly connected to the first threaded holes.

[0034] The pressure plate 12 has a first through hole 121 for the fixed post 22 to pass through; the fixed post 22 is provided with a reset assembly, which includes a push rod spring 15. The push rod spring 15 is sleeved on the fixed post 22, and one end of the push rod spring 15 is connected to the connecting plate 1113 and the other end is connected to the pressure plate 12.

[0035] An electromagnet 14 is fixed to the connecting plate 1113 by bolts. When the electromagnet 14 attracts the pressure plate 12, the push rod spring 15 is in a compressed and stored state. When the electromagnet 14 is de-energized, the force of the push rod spring 15 restoring its elastic deformation drives the pressure plate 12 to move away from the electromagnet 14 along the fixed column 22.

[0036] refer to Figure 1 and Figure 2 A position sensor 5 for detecting the position of the pressure plate 12 is connected to the base plate 1111. A safety circuit switch mechanism 6 is provided on the base plate 1111, which includes a contact block 61 connected to the pressure plate 12. A mounting assembly 63 is provided on the base plate 1111, which includes an L-shaped mounting plate 631. The mounting plate 631 has a tenth through hole, and the base plate 1111 has a second threaded hole. A fifth connecting bolt 632 is provided on the mounting plate 631, which passes through the tenth through hole and is threaded to the second threaded hole. A switch block 62 is fixedly connected to the mounting plate 631, and the switch is electrically connected to the power source that controls the movement of the elevator.

[0037] When the electromagnet 14 attracts the pressure plate 12, the contact block 61 on the pressure plate 12 will abut against the switch block 62, and only then can the elevator run. When the electromagnet 14 does not attract the pressure plate 12, the elevator will stop at a certain position and cannot operate normally.

[0038] refer to Figure 2 A pushing component 4 is provided on the base plate 1111. The pushing component 4 includes a support frame 41, which is connected to the fixed plate 21. An electric push rod 42 is connected to the support frame 41, and the push rod of the electric push rod 42 can abut against the pressure plate 12.

[0039] When the push rod spring 15 is in its normal state, the push rod of the electric push rod 42 abuts against the pressure plate 12; when the electric push rod 42 is activated, the push rod of the electric push rod 42 pushes the pressure plate 12 toward the direction of the electromagnet 14, and the push rod spring 15 will deform; when the electromagnet 14 attracts the pressure plate 12, the push rod of the electric push rod 42 returns to its initial position.

[0040] refer to Figure 2 and Figure 4 The connecting plate 1113 has a seventh through hole and a guide assembly 7. The guide assembly 7 includes a third connecting bolt 71, one end of which passes through the seventh through hole on the connecting plate 1113. Two third connecting nuts 72 are threaded onto the third connecting bolt 71, and the two third connecting nuts 72 abut against the two sides of the connecting plate 1113 respectively. The third connecting bolt 71 has an eighth through hole 711 along its length for the lifting rope 13 to pass through.

[0041] refer to Figure 2 and Figure 4 The connecting mechanism 3 includes a first connecting block 31 and a second connecting block 32 integrally disposed on the first connecting block 31. The first connecting block 31 and the second connecting block 32 are arranged perpendicularly. A sixth through hole 122 is provided on the pressure plate 12, and a fourth through hole is provided on the second connecting block 32. A second connecting assembly 34 is provided on the second connecting block 32. The second connecting assembly 34 includes a second connecting bolt 341. A fifth through hole 3411 is provided at the end of the second connecting bolt 341 near its own nut for the lifting rope 13 to pass through. The end of the second connecting bolt 341 away from its own nut passes through the fourth through hole on the second connecting block 32. A second connecting nut 342 is threadedly connected to the second connecting bolt 341 passing through the fourth through hole. The second connecting nut 342 abuts against the second connecting block 32.

[0042] refer to Figure 4 and Figure 5 The first connecting block 31 has a third through hole, and the pressure plate 12 has a second through hole. The first connecting block 31 abuts against the side of the pressure plate 12 away from the electromagnet. The first connecting block 31 is provided with a first connecting assembly 33, which includes a first connecting bolt 331. The end of the first connecting bolt 331 away from its own nut passes through the third through hole on the first connecting block 31 and the second through hole on the pressure plate 12 in sequence. A first connecting nut 332 is threaded onto the first connecting bolt 331. The first connecting nut 332 abuts against the pressure plate 12, and the nut of the first connecting bolt 331 abuts against the first connecting block 31.

[0043] First, pass one end of the lifting rope 13 through the eighth through hole 711 on the third connecting bolt 71, then through the sixth through hole 122 on the pressure plate 12, and finally through the fifth through hole 3411 on the second connecting bolt 341; then, pass the end of the second connecting bolt 341 away from its own nut through the fourth through hole on the second connecting block 32, and then thread the second connecting nut 342 to the second connecting bolt 341 so that the second connecting nut 342 abuts against the second connecting block 32.

[0044] One end of the lifting rope 13 is connected to the second connecting bolt 341 and the other end is connected to the safety clamp on the elevator bridge.

[0045] The implementation principle of a lifting mechanism in this application embodiment is as follows: the housing 11 is installed on the elevator bridge car. When the elevator is running normally, the electromagnet 14 attracts the pressure plate 12, and the push rod spring 15 is in a compressed state; the contact block 61 on the pressure plate 12 abuts against the switch block 62 on the bottom plate 1111.

[0046] When the elevator overspeeds, the electromagnet 14 is de-energized, and the force of the push rod spring 15 restoring its elastic deformation drives the pressure plate 12 to move away from the electromagnet 14 on the fixed column 22. The first connecting block 31 on the pressure plate 12 drives the second connecting block 32 to move, and the second connecting block 32 drives the lifting rope 13 to move. The lifting rope 13 will trigger the safety clamp to brake, thereby fixing the position of the elevator car.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pulling mechanism, characterized by, The device includes a housing (11), a pressure plate (12), a lifting rope (13), an electromagnet (14), and a reset assembly. The housing (11) is located on an elevator car for lifting and lowering. The pressure plate (12) is slidably disposed inside the housing (11) through the reset assembly. One end of the lifting rope (13) is connected to the pressure plate (12), and the other end is connected to a safety clamp for braking. The electromagnet (14) is disposed on the housing (11), and the reset assembly is in a power-accumulating state when the electromagnet (14) attracts the pressure plate (12).

2. The pulling mechanism according to claim 1, wherein The reset assembly includes a push rod spring (15), one end of which is connected to the pressure plate (12) and the other end is connected to the housing (11). When the electromagnet (14) attracts the pressure plate (12), the push rod spring (15) is in a deformed state.

3. A pulling mechanism according to claim 1 or 2, characterized in that The housing (11) is provided with a limiting component (2), which includes a fixing plate (21) and a fixing post (22). The fixing plate (21) is disposed on the housing (11), and one end of the fixing post (22) is connected to the fixing plate (21) and the other end is connected to the housing (11). The pressure plate (12) is provided with a first through hole (121) through which the fixing post (22) passes.

4. The pulling mechanism according to claim 1, wherein The pressure plate (12) is provided with a connecting mechanism (3) that is connected to the lifting rope (13). The connecting mechanism (3) includes a first connecting block (31), a second connecting block (32), a first connecting component (33), and a second connecting component (34). The first connecting block (31) is disposed on the pressure plate (12) through the first connecting component (33), the second connecting block (32) is fixedly disposed on the first connecting block (31), and the lifting rope (13) is disposed on the second connecting block (32) through the second connecting component (34).

5. A pulling mechanism according to claim 4, wherein The first connecting assembly (33) includes a first connecting bolt (331) and a first connecting nut (332). The pressure plate (12) has a second through hole, and the first connecting block (31) has a third through hole. The end of the first connecting bolt (331) away from its own nut passes through the third through hole and the second through hole in sequence. The first connecting nut (332) is threadedly connected to the first connecting bolt (331). The first connecting nut (332) abuts against the pressure plate (12), and the nut of the first connecting bolt (331) abuts against the first connecting block (31).

6. The pulling mechanism according to claim 4, wherein The second connecting assembly (34) includes a second connecting bolt (341) and a second connecting nut (342). A fourth through hole is provided on the second connecting block (32). A fifth through hole (3411) is provided on the end of the second connecting bolt (341) near its own nut. A sixth through hole (122) is provided on the pressure plate (12). One end of the lifting rope (13) passes through the sixth through hole (122) and the fifth through hole (3411). The end of the second connecting bolt (341) away from its own nut passes through the fourth through hole. The second connecting nut (342) is threadedly connected to the second connecting bolt (341) passing through the fourth through hole, and the second connecting nut (342) abuts against the second connecting block (32).

7. The pulling mechanism according to claim 1, wherein The housing (11) is provided with a pushing assembly (4), which includes a support frame (41) and an electric push rod (42). The support frame (41) is provided on the housing (11), and the electric push rod (42) is provided on the support frame (41). The electric push rod (42) can drive the pressure plate (12) to move.

8. The pulling mechanism according to claim 1, wherein A position sensor (5) is provided on the housing (11), and the position sensor (5) is used to detect the position of the pressure plate (12).

9. The pulling mechanism according to claim 1, wherein The safety circuit switch mechanism (6) on the housing (11) includes a contact block (61) and a switch block (62). The contact block (61) is disposed on the pressure plate (12), and the switch block (62) is disposed on the housing (11). The switch block (62) can abut against the contact block (61).

10. A lifting mechanism according to claim 1, characterized in that, A guide assembly (7) is formed on the housing (11). The guide assembly (7) includes a third connecting bolt (71) and a third connecting nut (72). A seventh through hole is provided on the housing (11). One end of the third connecting bolt (71) passes through the seventh through hole. There are two third connecting nuts (72). Both third connecting nuts (72) are threadedly connected to the third connecting bolt (71), and both third connecting nuts (72) abut against the side wall of the housing (11). An eighth through hole (711) is provided on the third connecting bolt (71) for the lifting rope (13) to pass through.

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