Car fixation mechanism

Abstract

The application discloses a car fixing mechanism, aiming at solving the problems of complicated structure and inconvenient operation of the device for preventing elevator from moving unexpectedly in the prior art. The technical scheme is as follows: a collision block is fixedly arranged in a shaft; a safety mechanism is fixedly arranged on a car; the safety mechanism comprises a stop block arranged rotatably, a pulling mechanism connected to the stop block and used for pulling the stop block to rotate, and a reset mechanism connected to the stop block and used for resetting the stop block. In the application, the stop block is pulled by the pulling mechanism, so that the stop block is in a horizontal position; when the elevator falls in danger, the stop block can abut against the collision block, the descent of the elevator is limited, and the protection is realized; after the maintenance is completed, the pulling mechanism is released from the force acting on the stop block, the stop block can be returned to the original position through the reset mechanism, and the elevator can normally run. Therefore, the application has the characteristics of simple structure and convenient operation.

Description

Technical Field

[0001] This invention relates to the field of elevator technology, and more specifically, to a car fixing mechanism. Background Technology

[0002] Elevators can be categorized into machine-room and machine-room-less types. Machine-room elevators have sufficient space to install locking devices, facilitating maintenance on the car top and in the pit, and preventing accidental car movement. Machine-room-less elevators are increasingly becoming a trend due to their advantages such as not occupying machine room space and being environmentally friendly and energy-efficient. Villa elevators, in particular, have higher requirements for shaft space utilization. Therefore, most machine-room-less villa elevators, and even some platform elevators, lack sufficient pit space. This poses a significant safety hazard when maintaining guide shoes, safety brakes, and other components in the pit. To prevent accidents to maintenance personnel in the pit, the car's mechanical components must be mechanically restrained. Given the compact nature of backpack-frame platform elevators, designing an easily operable and highly safe mechanism to secure the car in case of accidental movement is a pressing problem that needs to be solved.

[0003] Chinese Patent Publication No. CN109573773A, Publication Date: January 19, 2019, The invention is entitled "An Elevator Maintenance Safety Device". When using the above application, it is necessary to pull the rotating shaft so that the rotating shaft contacts the first limit switch. Then, the rotating shaft is rotated so that the rotating shaft drives the blocking plate to rotate to the horizontal position. The blocking plate is used to prevent the elevator from falling. Although the above application can effectively prevent the danger of the elevator falling, it has the following two shortcomings: (1) The structure is complicated, which makes the operation more complicated. When using it, it is necessary to pull the rotating shaft first and then rotate the rotating shaft to achieve the function of preventing the fall. (2) Since the limit device is installed on the guide rail, the elevator can only be restricted to the position where the limit device is installed. When the elevator needs to install limit devices in multiple positions in the vertical direction, it is necessary to increase the number of limit devices, which increases the cost of installing limit devices. Summary of the Invention

[0004] This invention overcomes two shortcomings in the prior art: (1) the structure of the device to prevent the elevator from moving unexpectedly is complex and the operation is troublesome; (2) if the elevator needs to be equipped with several devices on the track to prevent the elevator from moving outside, the cost of installing the limiting device will increase; a car fixing mechanism is provided, which has the characteristics of simple structure and convenient operation. At the same time, only by installing the bumper on the elevator track, the elevator can be fixed at several positions on the track.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a car fixing mechanism, comprising:

[0006] The impact block is fixedly installed inside the shaft.

[0007] The safety mechanism is fixedly installed on the car; the safety mechanism includes a rotatable stop, a pulling mechanism connected to the stop for rotating the stop, and a reset mechanism connected to the stop for resetting the stop.

[0008] In this invention, during maintenance, a pulling mechanism moves the stop block to a horizontal position. This allows the stop block to abut against a collision block in the event of an elevator fall, limiting the elevator's descent and protecting the workers. After maintenance, the pulling mechanism is released, allowing the reset mechanism to return the stop block to its original position, enabling normal elevator operation. Therefore, this invention is simple in structure and easy to operate. Furthermore, when multiple fixing mechanisms are needed within the shaft, multiple collision blocks can be installed. In the event of an emergency, the elevator can stop at each collision block, effectively protecting passengers. The simple structure and easy installation of the collision blocks significantly reduce installation costs.

[0009] Preferably, the safety mechanism also includes a fixed plate fixedly mounted on the car, the fixed plate having a rotating shaft, and the stop block having a rotating shaft hole that mates with the rotating shaft.

[0010] The fit between the rotating shaft and the rotating shaft hole allows the stop block to rotate around the rotating shaft.

[0011] Preferably, the fixed plate is provided with a guide groove, and the stop block is provided with a guide rod that cooperates with the guide groove, and the guide rod is slidably disposed in the guide groove.

[0012] The cooperation between the guide groove and the guide rod makes the stop block more stable when rotating, and also fixes the angle at which the stop block can rotate.

[0013] Preferably, there are two fixing plates, which are arranged in parallel, and a stop block is arranged between the two fixing plates.

[0014] The two fixing plates ensure that the stop block is more securely fixed between them, guaranteeing the normal operating life of the safety mechanism.

[0015] Preferably, the stop block is provided with mounting holes along the line connecting the two fixing plates, and the guide rod passes through the mounting holes, with the ends of the guide rod located in the guide grooves of the two fixing plates respectively.

[0016] The guide rod is designed to allow movement along the guide groove, and also allows the guide rod to be removable.

[0017] Preferably, the pulling mechanism includes a pull rope and a latch that restricts the movement of the pull rope, with one end of the pull rope fixedly connected to a stop.

[0018] By having the rope act directly on the stop block, the overall structure becomes simpler.

[0019] Preferably, the latch includes: a lock cylinder having a through-hole, the opening at one end of the lock hole gradually narrowing outward to form a first lock surface;

[0020] The lock head has a through-hole, and the opening at one end of the lock head hole is fitted into the first lock surface and cooperates with the first lock surface to form a second lock surface;

[0021] A steel ball is provided in the circumferential direction of the second lock surface, and the steel ball is placed in the steel ball hole;

[0022] A self-locking spring is provided at the end of the lock cylinder away from the first locking surface, where an inwardly contracting abutting ring is provided, and the self-locking spring abuts against the end of the abutting ring and the second locking surface;

[0023] The mounting cylinder and the locking cylinder are fixedly installed at one end of the mounting cylinder, and the side wall of the mounting cylinder is provided with a side wall hole.

[0024] The locking mechanism locks the pull rope, eliminating the need for continuous tightening during maintenance, as the lock provides self-locking. Once maintenance is complete, pressing the lock head releases the lock. Therefore, this embodiment features a simple structure and convenient operation.

[0025] Preferably, the reset mechanism is a reset spring, one end of which is connected to the stop block, and the reset spring continuously provides a reset pulling force to the stop block.

[0026] The reset mechanism is simply a reset spring, which provides a continuous reset force.

[0027] Preferably, a first switch and a second switch are also included;

[0028] The first switch is used to put the elevator in maintenance mode. When the pulling mechanism pulls the stop block to rotate, the stop block contacts the first switch.

[0029] The second switch is used to put the elevator into operation. When the reset mechanism puts the stop in the reset state, the stop contacts the second switch.

[0030] The first and second switches are configured so that the movement of the stop block can automatically coordinate with the working states of the first and second switches, thus achieving a dual protection function.

[0031] Preferably, the stop block is provided with a stop that cooperates with the impact block.

[0032] The combination of the stop and the impact block allows the impact block to better restrict the downward movement of the elevator.

[0033] Compared with the prior art, the beneficial effects of the present invention are:

[0034] (1) It has a simple structure, is easy to operate, and can protect the staff.

[0035] (2) Installing a stop block on the elevator track can limit and fix the elevator at several positions on the track, effectively preventing the danger of the elevator suddenly falling and ensuring the safety of passengers. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the installation structure of the present invention;

[0037] Figure 2 This is a schematic diagram of the working state of the present invention;

[0038] Figure 3 This is an exploded structural diagram of the present invention;

[0039] Figure 4 This is a structural diagram of the reset state of the present invention;

[0040] Figure 5 This is a cross-sectional view of the latch of the present invention;

[0041] In the diagram: 1. Impact block, 11. Track, 12. Mounting plate, 13. Vertical beam;

[0042] 2. Stop block; 21. Shaft hole; 22. Mounting hole; 23. Stop opening;

[0043] 3. Pulling mechanism; 31. Pull rope; 32. Lock; 33. Lock cylinder; 331. Lock hole; 332. First lock face; 34. Lock head; 341. Lock head hole; 342. Second lock face; 343. Steel ball hole; 35. Steel ball; 36. Self-locking spring; 37. Abutment ring; 38. Mounting hole; 381. Side wall hole; 382. Lock mounting hole;

[0044] 4. Return spring;

[0045] 5. Fixing plate; 51. Guide groove; 52. Shaft mounting hole; 53. Fixing head;

[0046] 6. Shaft;

[0047] 7. Guide rod;

[0048] 81. First switch; 82. Second switch. Detailed Implementation

[0049] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0050] Example 1: Refer to Figures 1 to 5 As shown, a car fixing mechanism includes a strike block 1 and a safety mechanism:

[0051] The impact block 1 is fixedly installed inside the shaft. In this embodiment, the impact block 1 is fixedly installed on the track 11 inside the shaft.

[0052] The safety mechanism is fixedly mounted on the upright beam 13 on the side of the car via the mounting plate 12; the safety mechanism includes a rotatable stop block 2 and a fixing plate 5, two fixing plates 5 are provided, the two fixing plates 5 are arranged in parallel, and the stop block 2 is rotatably arranged between the two fixing plates 5.

[0053] Two fixing plates 5 are provided with shaft mounting holes 52, and the shaft 6 passes through the shaft mounting holes 52. The stop block 2 is provided with shaft holes 21 that cooperate with the shaft 6, and the shaft 6 passes through the shaft holes 21. Both ends of the shaft 6 are located in the shaft mounting holes 52.

[0054] A guide groove 51 is provided on the fixed plate 5. The guide groove 51 is an arc-shaped groove with its opening direction horizontal. A guide rod 7 that cooperates with the guide groove 51 is provided on the stop block 2. The guide rod 7 is slidably disposed in the guide groove 51. The stop block 2 is provided with a mounting hole 22 along the line connecting the two fixed plates 5. The guide rod 7 passes through the mounting hole 22, and the ends of the guide rod 7 are respectively located in the guide groove 51 of the two fixed plates 5.

[0055] The stop block 2 is connected to a pulling mechanism 3 that pulls the stop block 2 to rotate, and the stop block 2 is connected to a reset mechanism that resets the stop block 2.

[0056] The pulling mechanism 3 includes a pull rope 31 and a lock 32 that restricts the movement of the pull rope 31. The pull rope 31 is a steel wire pull rope. One end of the pull rope 31 is fixedly connected to the end of the guide rod 7. The other end of the pull rope 31 can be set as needed. In this embodiment, the other end of the pull rope 31 is set inside the elevator.

[0057] The reset mechanism is a reset spring 4. One end of the reset spring 4 is fixedly connected to the guide rod 7, and the other end of the reset spring 4 is connected to the fixed head 53 below the fixed plate 5. The reset spring 4 continuously provides a downward reset force to the stop block 2.

[0058] A first switch 81 is located above the space between the two fixed plates 5, and a second switch 82 is located below the space between the two fixed plates 5. The first switch 81 is used to put the elevator in maintenance mode. When the pulling mechanism 3 pulls the stop block 2 upward, the stop block 2 contacts the first switch 81. The second switch 82 is used to put the elevator in working mode. When the reset mechanism 4 puts the stop block 2 in the downward reset state, the stop block 2 contacts the second switch 82. Both the first switch 1 and the second switch 2 are existing technologies.

[0059] The working principle of this embodiment is as follows:

[0060] 1) The initial state of the safety mechanism is as follows: the return spring 4 pulls the guide rod 7 downward, so that the stop block 2 is in a vertical state and the stop block 2 retracts between the two fixed plates 5;

[0061] 2) The working status of the safety mechanism is as follows: (Refer to...) Figure 1 and Figure 2 As shown, when the elevator needs to be stopped for maintenance, the car can be stopped on the second floor. Then, by manually pulling the pull rope 31, the pull rope 31 moves the guide rod 7 along the guide groove 51. During the movement of the guide rod 7 along the guide groove 51, the stop block 2 rotates 90 degrees around the rotating shaft 6. When the guide rod 5 moves to the uppermost end of the guide groove 51, the stop block 2 is in a horizontal state. The stop 23 at the front end of the stop block 2 extends between the two fixed plates 5. At the same time, the upper end of the stop block 2 abuts against the first switch 81, so that the elevator is in the maintenance state. When the elevator suddenly falls, the stop block 2 will abut against the impact block 1 when the elevator descends, thereby limiting the descent of the elevator and preventing the elevator from falling, effectively ensuring the safety of the elevator maintenance personnel.

[0062] 3) Termination of work status: Refer to Figure 4 As shown, after the maintenance is completed, the pull rope 31 is released, and the reset spring 4 pulls the guide rod 7 downward. As the guide rod 7 moves along the guide groove 51, it drives the stop block 2 to rotate around the rotating shaft 6. When the guide rod 5 moves to the bottom of the guide groove 51, the stop block 2 returns to the initial state of the safety mechanism. At this time, the stop block 2 abuts against the second switch 81 below, so that the elevator is in working condition.

[0063] In addition, in this embodiment, a stop block 2 can be set on each floor of the building corresponding to the track 11 of the shaft. Since the stop block 2 has a simple structure and is easy to install, the installation cost is reduced. When the elevator malfunctions, passengers in the elevator can pull the pull rope 31 to activate the safety mechanism, which can effectively prevent the elevator from falling due to the malfunction and ensure the safety of passengers.

[0064] Example 2: Refer to Figures 1 to 5 As shown, this embodiment is similar in structure to embodiment 1, except that the structure of the latch 32 specifically includes a lock cylinder 33, a lock head 34, a steel ball 35, a self-locking spring 36, and a mounting cylinder 38;

[0065] The lock cylinder 33 is provided with a lock hole 331, and the opening at one end of the lock hole 331 gradually narrows outward to form a first lock surface 332;

[0066] The lock head 34 is provided with a lock head hole 341, and the opening at one end of the lock head hole 341 is fitted into the first lock surface 332 and cooperates with the first lock surface 332 to form the second lock surface 342;

[0067] The second lock face 342 has a steel ball hole 343 in the circumferential direction, and the steel ball 35 is disposed in the steel ball hole 343; in this embodiment, there are three steel ball holes 342.

[0068] The self-locking spring 36 and the locking cylinder 33 have an inwardly contracting abutment ring 37 at the end away from the first locking surface 332. The self-locking spring 36 abuts against the end of the abutment ring 37 and the second locking surface 342. The self-locking spring 36 continuously pushes the second locking surface 342 towards the first locking surface 332. The abutment ring 37 is connected to the end of the locking cylinder 33 away from the lock head 34 by a thread.

[0069] The outer wall of the mounting cylinder 38 and the locking cylinder 33 are threaded. The locking cylinder 33 is fixedly mounted at one end of the mounting cylinder 38 through the threaded engagement. The side wall of the mounting cylinder 38 is provided with a side wall hole 381. The end of the mounting cylinder 38 away from the lock head 34 is provided with a latch mounting hole 382 for easy fixed connection with the mounting plate 12.

[0070] One end of the pull rope 31 is fixedly connected to the guide rod 7, and the other end of the pull rope 31 passes through the lock hole 341, the lock hole 331, the abutting ring 37 in sequence and finally comes out from the side wall hole 381.

[0071] Reference Figure 5 As shown, the usage of this embodiment is basically the same as that of Embodiment 1. The difference is that when the worker pulls the pull rope 31 to put the elevator in maintenance mode, the pull rope 31 can be released. When the pull rope 31 is pulled back by the return spring 4, the self-locking spring 36 pushes the second locking surface 342 to cooperate with the first locking surface 332, so that the first locking surface 332 pushes the steel ball 35 to abut against the circumference of the pull rope 31, thereby locking the pull rope 31 by the steel ball 35, so that the hand can be released, effectively preventing the pull rope 31 from being reset by the force of the return spring 4. When the maintenance is completed and the stop block 2 needs to be reset, simply press the lock head 34 into the lock hole 331, so that the lock head 34 moves inward against the force of the self-locking spring 36, so that the steel ball 35 releases the lock on the pull rope 31, and the stop block 2 is reset by the force of the return spring 4.

[0072] This embodiment makes operation more convenient. The latch 32 can lock the pull rope 31, so that the rope 31 does not need to be continuously tightened during maintenance. The latch 32 can self-lock the pull rope 31. After maintenance is completed, the lock can be released by pressing the lock head 34. Therefore, this embodiment has the characteristics of simple structure and further convenient operation.

[0073] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Other variations and modifications may be made without departing from the technical solutions described in the claims.

Claims

1. A car fixing mechanism, characterized in that, include: The impact block is fixedly installed inside the shaft. The safety mechanism is fixedly installed on the car; the safety mechanism includes a rotatable stop block, a pulling mechanism connected to the stop block for rotating, and a reset mechanism connected to the stop block for resetting the stop block. The safety mechanism also includes a fixed plate that is fixedly mounted on the car, a rotating shaft on the fixed plate, and a stop block with a rotating shaft hole that mates with the rotating shaft; The fixed plate is provided with a guide groove, and the stop block is provided with a guide rod that matches the guide groove. The guide rod is slidably disposed in the guide groove. There are two fixing plates, which are arranged in parallel, and a stop block is set between the two fixing plates; The stop block has mounting holes along the line connecting the two fixed plates, and the guide rod passes through the mounting holes. The ends of the guide rod are located in the guide grooves of the two fixed plates respectively. The pulling mechanism includes a pull rope and a lock that restricts the movement of the pull rope, with one end of the pull rope fixedly connected to the stop block; The latch includes: A lock cylinder has a through-hole, and the opening at one end of the lock hole gradually narrows outward to form the first lock surface; The lock head has a through-hole, and the opening at one end of the lock head hole is fitted into the first lock surface and cooperates with the first lock surface to form a second lock surface; A steel ball is provided in the circumferential direction of the second lock surface, and the steel ball is placed in the steel ball hole; A self-locking spring is provided at the end of the lock cylinder away from the first locking surface, where an inwardly contracting abutting ring is provided, and the self-locking spring abuts against the end of the abutting ring and the second locking surface; The mounting cylinder and the locking cylinder are fixedly installed at one end of the mounting cylinder, and the side wall of the mounting cylinder is provided with a side wall hole.

2. The car fixing mechanism according to claim 1, characterized in that, The reset mechanism is a reset spring, one end of which is connected to the stop block. The reset spring continuously provides a reset pulling force to the stop block.

3. The car fixing mechanism according to claim 1, characterized in that, It also includes a first switch and a second switch; The first switch is used to put the elevator in maintenance mode. When the pulling mechanism pulls the stop block to rotate, the stop block contacts the first switch. The second switch is used to put the elevator into operation. When the reset mechanism puts the stop in the reset state, the stop contacts the second switch.

4. The car fixing mechanism according to claim 1, characterized in that, The stop block is equipped with a stop that cooperates with the impact block.

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