An elevator buffer

Abstract

The utility model relates to elevator equipment technical field, concretely is a kind of elevator buffer, including several oil pressure buffers, fixedly installed in elevator shaft and located the below of car, the base below of car, the sleeve is sleeved in the top of base, first shear bolt and car moving direction vertical through base and sleeve, strip hole is set up on the sleeve, the length direction of strip hole is parallel with the moving direction of car, second shear bolt and car moving direction vertical through base and pass through strip hole, the second shear bolt is located the bottom of strip hole, first shear bolt and second shear bolt are respectively screw threaded with nut on. By using first shear bolt, second shear bolt and third shear bolt auxiliary oil pressure buffer buffer car, when coping with high-rise or super high-rise elevator, the length of the oil pressure buffer does not need to be excessively increased to meet use.

Description

Technical Field

[0001] This utility model relates to the field of elevator equipment technology, specifically to an elevator buffer. Background Technology

[0002] Elevator buffers are critical safety devices installed at the bottom of elevator shafts. They absorb or dissipate the kinetic and potential energy of the elevator when it goes out of control, preventing the car from directly impacting the bottom of the shaft, thereby ensuring passenger safety and reducing equipment damage. They are the last physical protective barrier in the elevator safety system.

[0003] Currently, most elevator buffers on the market are hydraulic buffers. They utilize the flow resistance of hydraulic oil through a throttling orifice to dissipate energy. Upon impact, the piston compresses the oil, and the oil flow generates damping force to brake the car smoothly. With the development of living standards and the increasing prevalence of high-rise and super high-rise buildings, the demand for elevator transportation distances is also increasing. When an elevator falls out of control, the speed generated by the elevator falling from a high floor is also greater. The higher the speed, the longer the compression stroke needs to be. Consequently, the hydraulic buffers currently in use need to be longer. The longer the hydraulic buffer, the higher the strength requirement for the impact-bearing pressure bar on the hydraulic buffer, resulting in greater manufacturing difficulty, difficulty in controlling costs, and a significant increase in the defect rate of hydraulic buffer production. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an elevator buffer, comprising: Several hydraulic dampers are fixedly installed inside the elevator shaft and located below the car; A base located below the car, with a sleeve fitted on the top of the base, and a first shear bolt penetrating the base and the sleeve perpendicular to the direction of car movement; The sleeve has a strip-shaped hole, the length of which is parallel to the direction of movement of the car. The second shear bolt passes through the base and through the strip-shaped hole, perpendicular to the direction of movement of the car. The second shear bolt is located at the bottom of the strip-shaped hole. Nuts are threaded onto both the first and second shearing bolts.

[0005] As a preferred technical solution of this utility model, several of the hydraulic buffers are evenly distributed in an array.

[0006] As a preferred technical solution of this utility model: the movable end of the hydraulic buffer is fixedly installed with an impact plate, and the impact plate is fixedly installed with an elastic element that wraps around the movable end of the hydraulic buffer and is fixedly connected to the fixed end of the hydraulic buffer at the other end.

[0007] As a preferred technical solution of this utility model: the number of the first shearing bolts is multiple, and the multiple first shearing bolts are evenly distributed along the circumference of the base.

[0008] As a preferred technical solution of this utility model: there are multiple second shear bolts, which are evenly distributed along the circumference of the base, and there are multiple strip holes that correspond one-to-one with the multiple second shear bolts.

[0009] As a preferred technical solution of this utility model: a collar located below the sleeve is sleeved on the base, a third shearing bolt passes through the base and the collar, and a nut is also threaded onto the third shearing bolt.

[0010] As a preferred technical solution of this utility model: the bottom of the side wall of the base extends outward, so that the bottom of the side wall of the base forms an inclined surface, and the collar cannot slide through the inclined surface.

[0011] As a preferred technical solution of this utility model: four guide bars arranged in a rectangular pattern are fixedly installed inside the elevator shaft, and the car is located within the four guide bars and guided by the guide bars.

[0012] As a preferred technical solution of this utility model: the top of the sleeve is detachably and fixedly fitted with a cover plate.

[0013] This utility model has the following beneficial effects: By using the first shear bolt, the second shear bolt, and the third shear bolt to assist the hydraulic buffer in cushioning the car, the length of the hydraulic buffer does not need to be excessively increased when dealing with high-rise or super high-rise elevators. This reduces the specification requirements of the hydraulic buffer, lowers the manufacturing difficulty and cost of the hydraulic buffer, and improves the production yield of the hydraulic buffer. In addition, since the first shear bolt, the second shear bolt, and the third shear bolt are low in cost, the repair cost after use is low. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure provided by this utility model.

[0015] Figure 2 This utility model provides Figure 1 Enlarged diagram of point A in the diagram.

[0016] Appendix Figure 1-2 The structures represented by each label are listed below: 1. Elevator shaft; 2. Car; 3. Guide bar; 4. Hydraulic buffer; 5. Impact plate; 6. Elastic element; 7. Base; 8. Sleeve; 9. Cover plate; 10. Round hole; 11. First shear bolt; 12. Strip hole; 13. Second shear bolt; 14. Nut; 15. Collar; 16. Third shear bolt; 17. Inclined surface. Detailed Implementation

[0017] The principles and features of this utility model are described below. The embodiments given are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0018] It should be noted that when a part or component is considered to be "connected to," "located on," or "assembled" to another part or component, it can be directly mounted on the other part or component, or it may be located in an intermediate part or component. The terms "left," "right," "upper," "lower," and similar expressions used in this document are for illustrative purposes only.

[0019] Example 1, as Figure 1-2 As shown, an elevator buffer includes several hydraulic buffers 4, which are fixedly installed in the elevator shaft 1 and located below the car 2. The extension and retraction direction of the hydraulic buffers 4 is parallel to the movement direction of the car 2, and the movable end of the hydraulic buffers 4 faces the car 2. It also includes a base 7 located below the car 2. The base 7 is located directly below the center of the car 2. A sleeve 8 is sleeved on the top of the base 7. The sleeve 8 can slide up and down along the base 7 when there is no external force obstruction. A first shear bolt 11 passes through the base 7 and the sleeve 8 perpendicular to the movement direction of the car 2. A strip hole 12 is opened on the sleeve 8. The length direction of the strip hole 12 is parallel to the movement direction of the car 2. A second shear bolt 13 passes through the base 7 and through the strip hole 12 perpendicular to the movement direction of the car 2. The second shear bolt 13 is located at the bottom of the strip hole 12. Nuts 14 are threadedly connected to the first shear bolt 11 and the second shear bolt 13 respectively.

[0020] The relative positions of the base 7 and the sleeve 8 are fixed by the first shear bolt 11, so that the first shear bolt 11 fixes the sleeve 8 before it breaks, and the top of the sleeve 8 is higher than the top of the base 7. After the car 2 collides with the cover plate 9, the impact force breaks the first shear bolt 11, consuming part of the kinetic energy of the car 2 and decelerating the car 2. After the first shear bolt 11 is broken, the sleeve 8 slides downward along the height direction of the base 7, so that the top wall of the strip hole 12 moves to contact the second shear bolt 13. If the falling height of the car 2 is low, the remaining kinetic energy after being buffered by the hydraulic buffer 4 and the first shear bolt 11 is not enough to break the second shear bolt 13, so that the car 2 stops falling. If the falling height of the car 2 is high, the second shear bolt 13 continues to break, so that the second shear bolt 13 further consumes the kinetic energy of the car 2 and further decelerates the car 2. Finally, the hydraulic buffer 4 brings the car 2 to a complete stop.

[0021] In this embodiment, the number of the strip-shaped holes 12 is one group. It should be understood that in other embodiments, the number of the strip-shaped holes 12 can also be multiple groups, and the length of each group of strip-shaped holes 12 is different, so that multi-stage buffering is formed. After the second shear bolt 13 in the strip-shaped hole 12 with a smaller length is sheared off, the sleeve 8 continues to move to shear off the second shear bolt 13 in the strip-shaped hole 12 with the second smallest length, and this process is performed sequentially until the car 2 stops.

[0022] A plurality of the oil pressure buffers 4 are uniformly distributed in an array manner. Taking the number of the oil pressure buffers 4 as four as an example, the four oil pressure buffers 4 are distributed in a rectangular array below the car 2, and the base 7 is located at the center of the rectangle formed by the four oil pressure buffers 4.

[0023] An impact plate 5 is fixedly mounted on the movable end of the oil pressure buffer 4, and an elastic member 6 that wraps the movable end of the oil pressure buffer 4 and whose other end is fixedly connected to the fixed end of the oil pressure buffer 4 is fixedly mounted on the impact plate 5, so that when the car 2 impacts the impact plate 5, the elastic member 6 assists the oil pressure buffer 4 in buffering, and when the oil pressure buffer 4 is reset subsequently, the thrust generated by the elastic member 6 restoring its deformation can assist in resetting the oil pressure buffer 4, so that the movable end of the oil pressure buffer 4 extends out again.

[0024] Four guide strips 3 distributed in a rectangular shape are fixedly installed in the elevator shaft 1, the inner corners of the four guide strips 3 respectively wrap the four outer corners of the outer wall of the car 2, and the car 2 is located in the four guide strips 3 and guided by the guide strips 3, so that the car 2 will not sway left, right, front or back when moving.

[0025] A cover plate 9 is detachably and fixedly installed on the top of the sleeve 8, both the base 7 and the sleeve 8 are in a "square-loop" shape. Specifically, the top of the sleeve 8 is fixed to the cover plate 9 by screws. After the first shear bolt 11 or the second shear bolt 13 is sheared off, the cover plate 9 is removed from the sleeve 8, which facilitates reinstallation of a new first shear bolt 11 or second shear bolt 13 and removal of the broken one from the interior of the base 7 and the sleeve 8.

[0026] Embodiment 2, as Figure 1-2 shown, the difference between this embodiment and Embodiment 1 is that the number of the first shear bolts 11 is multiple, and the plurality of first shear bolts 11 are evenly distributed along the circumferential direction of the base 7. Taking the number of the first shear bolts 11 as four as an example, the four first shear bolts 11 are respectively located at the transverse midpoints of the front, rear, left and right side walls of the base 7, so that when the car 2 drives the sleeve 8 to shear off the first shear bolts 11, the stress on the sleeve 8 is uniform, so as to prevent the sleeve 8 from side bending and breaking.

[0027] There are multiple second shear bolts 13, which are evenly distributed along the circumference of the base 7, similar to the distribution of the first shear bolts 11. There are multiple strip holes 12, which correspond one-to-one with the multiple second shear bolts 13. Strip holes 12 of the same length form a group, so that the second shear bolts 13 in the same group of strip holes 12 are simultaneously stressed when the sleeve 8 moves.

[0028] Example 3, as Figure 1-2 As shown, this embodiment is a further improvement based on embodiment one or embodiment two. A collar 15 located below the sleeve 8 is sleeved on the base 7. The third shear bolt 16 passes through the base 7 and the collar 15. A nut 14 is also threaded onto the third shear bolt 16.

[0029] If the sleeve 8 continues to move downwards and comes into contact with the collar 15 after breaking the second shear bolt 13, the third shear bolt 16 will once again generate resistance to absorb the falling potential energy of the car 2, acting as the last buffer barrier to decelerate the car 2 and ensure that the car 2 decelerates to a safe speed after breaking the third shear bolt 16. Therefore, the force required for the third shear bolt 16 to break under shear force should be greater than the force required for the first shear bolt 11 and the second shear bolt 13 to break under shear force, that is, the third shear bolt 16 has higher strength, so that the third shear bolt 16 can absorb more energy when it breaks.

[0030] It should be understood that the buffering effect of the third shear bolt 16 on the car 2 can also be improved by increasing the number of third shear bolts 16. The choice can be made based on actual needs and cost.

[0031] The bottom of the side wall of the base 7 extends outward, forming a slope 17 at the bottom of the side wall of the base 7. The collar 15 cannot slide through the slope 17, making the bottom of the base 7 into a truncated quadrangular shape. When the collar 15 moves downward after crushing the third shear bolt 16, the collar 15 is blocked by the slope 17. If the force is too great, it will be torn by the slope 17 starting from the bottom of the inside corner of the collar 15, consuming energy.

[0032] In summary: By using the first shear bolt 11, the second shear bolt 13, and the third shear bolt 16 to assist the hydraulic buffer 4 in providing multi-stage buffering for the car 2, the length of the hydraulic buffer 4 does not need to be excessively increased when dealing with high-rise or super high-rise elevators. This reduces the specification requirements for the hydraulic buffer 4, lowers the manufacturing difficulty and cost of the hydraulic buffer 4, and improves the production yield of the hydraulic buffer 4. In addition, since the first shear bolt 11, the second shear bolt 13, and the third shear bolt 16 are relatively inexpensive, the repair cost after use is low.

[0033] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any way. Anyone skilled in the art can smoothly implement this utility model according to the accompanying drawings and the above description. However, any modifications, alterations, or equivalent changes made by those skilled in the art without departing from the scope of the technical solution of this utility model using the disclosed technical content are equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or evolutions made to the above embodiments based on the essential technology of this utility model are still within the protection scope of the technical solution of this utility model.

Claims

1. An elevator buffer, characterized in that: include: Several hydraulic buffers (4) are fixedly installed in the elevator shaft (1) and located below the car (2); A base (7) located below the car (2) has a sleeve (8) fitted on the top of the base (7), and a first shear bolt (11) passes through the base (7) and the sleeve (8) perpendicular to the moving direction of the car (2). The sleeve (8) has a strip hole (12) with the length direction of the strip hole (12) parallel to the moving direction of the car (2). The second shear bolt (13) passes through the base (7) perpendicular to the moving direction of the car (2) and through the strip hole (12). The second shear bolt (13) is located at the bottom of the strip hole (12). Nuts (14) are threaded onto the first shear bolt (11) and the second shear bolt (13).

2. An elevator buffer according to claim 1, characterized in that: Several of the hydraulic buffers (4) are evenly distributed in an array.

3. An elevator buffer according to claim 2, characterized in that: The movable end of the hydraulic buffer (4) is fixedly installed with a shock plate (5), and an elastic element (6) is fixedly installed on the shock plate (5) to wrap around the movable end of the hydraulic buffer (4) and to be fixedly connected to the fixed end of the hydraulic buffer (4) at the other end.

4. An elevator buffer according to claim 1, characterized in that: The number of the first shear bolts (11) is multiple, and the multiple first shear bolts (11) are evenly distributed along the circumference of the base (7).

5. An elevator buffer according to claim 4, characterized in that: The number of the second shear bolts (13) is multiple, and the multiple second shear bolts (13) are evenly distributed along the circumference of the base (7). The number of strip holes (12) is multiple and corresponds one-to-one with the multiple second shear bolts (13).

6. An elevator buffer according to claim 1, characterized in that: A collar (15) located below the sleeve (8) is fitted onto the base (7). A third shear bolt (16) passes through the base (7) and the collar (15). A nut (14) is also threaded onto the third shear bolt (16).

7. An elevator buffer according to claim 6, characterized in that: The bottom of the side wall of the base (7) extends outward, so that the bottom of the side wall of the base (7) forms a slope (17), and the collar (15) cannot slide through the slope (17).

8. An elevator buffer according to claim 1, characterized in that: Four guide bars (3) are fixedly installed in the elevator shaft (1) in a rectangular arrangement. The car (2) is located in the four guide bars (3) and is guided by the guide bars (3).

9. An elevator buffer according to claim 1, characterized in that: The top of the sleeve (8) is detachably fixed with a cover plate (9).

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