Elevator shaft bottom hydraulic buffer rod
By introducing backpressure tanks and deformation parts into the hydraulic buffer rod at the bottom of the elevator shaft, linear buffering is achieved, solving the problems of poor cushioning effect and poor support of the existing buffer rods, and improving elevator safety and passenger protection.
Patent Information
- Application Number
- CN202421848306.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-01
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-08-01
AI Technical Summary
The existing hydraulic buffer rods at the bottom of the elevator shaft are not linear enough in the buffering effect, resulting in large reaction force of the car, small support area, poor support, and inability to effectively protect the safety of elevators and passengers.
A hydraulic buffer rod at the bottom of the elevator shaft is designed, including a hydraulic rod, a support part and a deformation part. The outer surface of the hydraulic rod connects to the backpressure tank, and the deformation part forms a support plane with the support part. The internal medium of the hydraulic rod enters the backpressure tank through a narrow passage, and linear buffering is achieved by using the compression of the reset part and the flow of the medium, which consumes the kinetic energy of the car and provides stable support.
A smoother and linear buffering effect is achieved, effectively reducing the speed of the car falling, improving the safety of elevators and passengers, and consuming part of the energy through the conversion of heat and kinetic energy of the medium to avoid sudden impact and rebound.
Smart Images
Figure CN223133842U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of elevators, in particular to a hydraulic buffer rod at the bottom of an elevator shaft. Background Art
[0002] The hydraulic buffer rod at the bottom of the elevator shaft, also known as the elevator buffer, is an important part of the elevator safety system. Its main function is to provide effective buffering during the operation of the elevator car. If the car runs out of control and falls or runs at high speed, it can prevent the elevator from directly hitting the bottom of the shaft, thereby greatly reducing the impact force that the elevator and passengers may receive and playing a protective role. The working principle of the hydraulic buffer is to utilize the compressibility of the liquid in the hydraulic system to absorb energy. When the elevator car falls onto the buffer, it will push the piston in the hydraulic cylinder, causing the hydraulic oil to be compressed. The energy in this process will be converted into heat energy and dissipated, thus avoiding the hard impact of the elevator. However, the existing buffer rod has a non-linear buffering effect on the car, resulting in a large reaction force on the car and poor buffering effect. Moreover, after the hydraulic buffer rod is completely compressed, the supporting area for the car is small and the supportability is poor. Content of the Utility Model
[0003] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Simplifications or omissions may be made in this part, as well as in the abstract and the title of the specification of this application, to avoid obscuring the purpose of this part, the abstract, and the title of the utility model. Such simplifications or omissions shall not be used to limit the scope of the utility model.
[0004] To solve the problems mentioned above, the utility model provides the following technical solution: A hydraulic buffer rod at the bottom of an elevator shaft includes a buffer rod body. The buffer rod body includes a hydraulic rod and a supporting part connected thereto. A deformation member is provided between the supporting part and the hydraulic rod. A back-pressure tank is communicated with the outer surface of the hydraulic rod. When the elevator car hits the supporting part and falls, the upper part of the deformation member bends to jointly form a supporting plane with the top of the supporting part, which abuts against the bottom of the elevator car. And the medium inside the hydraulic rod enters the tank chamber of the back-pressure tank through a narrow channel, causing the reset member inside the back-pressure tank to be compressed.
[0005] Based on the above technical solution, the utility model can be further improved as follows.
[0006] As a preferred scheme of the hydraulic buffer rod at the bottom of the elevator shaft of the utility model, wherein: the supporting part is an extension rod arranged in the hydraulic chamber through a main piston. A top plate is provided on the extension rod, and a buffer spring is provided between the top plate and the gasket of the hydraulic rod.
[0007] As a preferred embodiment of the hydraulic buffer rod at the bottom of the elevator shaft of the present utility model, wherein: a limiting strip is annularly arranged on the extension rod, and a limiting locking disc is arranged at the top of the hydraulic rod, and the limiting locking disc is sleeved in cooperation with the limiting strip.
[0008] As a preferred embodiment of the hydraulic buffer rod at the bottom of the elevator shaft of the present utility model, wherein: the limiting locking disc is composed of two pieces spliced together.
[0009] As a preferred embodiment of the hydraulic buffer rod at the bottom of the elevator shaft of the present utility model, wherein: there are several back pressure tanks, which are annularly arranged on the outer surface of the hydraulic rod, and the back pressure tanks are independently connected to the hydraulic rod through micropores. The micropores are located at the bottoms of the back pressure tanks and the hydraulic rod. One end of the reset member is connected to the inner wall of the back pressure tank, and the other end is movably sleeved in the tank chamber.
[0010] As a preferred embodiment of the hydraulic buffer rod at the bottom of the elevator shaft of the present utility model, wherein: the reset member is composed of a reset spring and a secondary piston. One end of the reset spring is connected to the inner wall of the back pressure tank, and the other end is connected to the secondary piston. The secondary piston is arranged in the tank chamber.
[0011] As a preferred embodiment of the hydraulic buffer rod at the bottom of the elevator shaft of the present utility model, wherein: the media in the tank chamber and the hydraulic chamber are connected and communicated through micropores.
[0012] As a preferred embodiment of the hydraulic buffer rod at the bottom of the elevator shaft of the present utility model, wherein: a base is arranged at the bottom of the hydraulic rod. One end of the deformation member is connected to the top disc, and the other end is connected to the base.
[0013] The beneficial effects of the present utility model are as follows: The deformation member acts similar to a spring, which can absorb and buffer the impact force of the car falling. The support surface formed after deformation provides stable support for the car. The medium inside the hydraulic rod flows into the back pressure tank under the action of pressure, and this process plays a role in pressure relief, effectively converting the kinetic energy of the car into the heat energy and kinetic energy of the medium, thereby consuming part of the energy and reducing the falling speed of the car. And the flow of the medium through the micropores presents a linear buffering effect, which makes the buffering more stable, improves the overall buffering performance, and can effectively protect the safety of the elevator and passengers. Description of the Drawings
[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings. Among them:
[0015] Figure 1It is a perspective view of the whole of this embodiment.
[0016] Figure 2 For this embodiment Figure 1 Partial perspective view.
[0017] Figure 3 For this embodiment Figure 2 Partial local perspective view.
[0018] Figure 4 It is a schematic diagram of the recovery tank and the hydraulic rod of this embodiment.
[0019] Figure 5 For this embodiment Figure 4 Partial schematic view.
[0020] In the figure: buffer rod body 100, base 101;
[0021] Hydraulic rod 102, gasket 102a, limit locking disc 102b, hydraulic cavity 102c;
[0022] Buffer spring 103;
[0023] Extension rod 104, limit strip 104a, main piston 104b;
[0024] Top disc 105;
[0025] Deformation part 200, support plane 201;
[0026] Back pressure tank 300, tank chamber 300a, micropores 300b;
[0027] Reset part 301, reset spring 301a, secondary piston 301b. Specific implementation manners
[0028] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the specific implementation manners of the present utility model will be described in detail below with reference to the accompanying drawings of the specification.
[0029] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.
[0030] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that can be included in at least one implementation manner of the present utility model. The appearances of "in one embodiment" in different places in this specification do not all refer to the same embodiment, nor are they separate or alternative embodiments that exclude each other with other embodiments.
[0031] Referring to Figures 1 to 5 , which is an embodiment of the present utility model. This embodiment provides a hydraulic buffer rod at the bottom of an elevator shaft, including a buffer rod body 100, characterized in that: the buffer rod body 100 includes a hydraulic rod 102 and a support structure connected thereto. A deformation member 200 is provided between the support portion and the hydraulic rod 102. A back-pressure tank 300 is communicated with the outer surface of the hydraulic rod 102. When the elevator car hits the support portion and falls, the upper part of the deformation member 200 bends to jointly form a support plane 201 with the top of the support portion, which abuts against the bottom of the elevator car. And the medium inside the hydraulic rod 102 enters the tank chamber 300a of the back-pressure tank 300 through a narrow channel, so that the reset member 301 inside the back-pressure tank 300 is compressed.
[0032] Specifically, the role of the deformation member 200 is similar to that of a spring. It can absorb and buffer the impact force of the car falling. The support surface 201 formed after deformation provides stable support for the car. The medium inside the hydraulic rod 102 flows into the back-pressure tank 300 under the action of pressure. This process plays a role in pressure relief, effectively converting the kinetic energy of the car into the heat energy and kinetic energy of the medium, thereby consuming part of the energy and reducing the falling speed of the car. And the flow of the medium through the micropores presents a linear buffering effect, which makes the buffering more stable, improves the overall buffering performance, and can effectively protect the safety of the elevator and passengers;
[0033] It is worth mentioning that the linear buffering is mainly reflected in the process of the medium entering the back-pressure tank 300 through the micropores. In a hydraulic system, when a fluid passes through a small hole or a throttle valve, its flow rate is proportional to the pressure difference, which is called Bernoulli's law. In the setting of this hydraulic buffer rod at the bottom of the elevator shaft, the pressure of the medium inside the hydraulic rod 102 increases as the car falls. When the medium enters the back-pressure tank 300 through the micropores, due to the fixed aperture of the micropores, the relationship between the flow rate and the pressure is linear. In other words, when the impact force, that is, the pressure increases, the outflow speed of the medium through the micropores will also increase linearly. In this way, the uniformity and continuity of the buffering process are ensured, avoiding sudden impacts or excessive rebounds, thereby providing a more stable and linear buffering effect. This setting helps to more effectively absorb and disperse the kinetic energy of the elevator, improving the overall safety;
[0034] Exemplarily, as Figures 1 - 2 shown, the support portion is an extension rod 104 provided in the hydraulic chamber 102c through a main piston 104b. A top plate 105 is provided on the extension rod 104, and a buffer spring 103 is provided between the top plate 105 and the gasket 102a of the hydraulic rod 102. The bottom of the hydraulic rod 102 is provided with a base 101, which is installed at the bottom of the elevator shaft through the base. The existing buffer rod buffers the kinetic energy of the car by compressing the spring and hydraulic oil into the heat energy of the oil;
[0035] As Figure 3 shown, a limiting strip 104a is annularly arranged on the extension rod 104, and a limiting locking disc 102b is arranged at the top of the hydraulic rod 102. The limiting locking disc 102b is sleeved in cooperation with the limiting strip 104a. The limiting locking disc 102b is composed of two spliced parts. By installing the limiting strip on the extension rod 104 and matching it with the limiting locking disc 102b at the top of the hydraulic rod 102, the limiting locking disc 102b clamps the surface of the limiting strip. When the car falls, the friction between the limiting strip and the locking disc can offset part of the kinetic energy of the car. At the same time, the limiting disc can also limit the extension rod and prevent it from shaking;
[0036] As Figure 1 , Figure 4 shown, the media in the tank chamber 300a and the hydraulic chamber 102c are connected through the micropores 300b. There are several back-pressure tanks 300, which are annularly arranged on the outer surface of the hydraulic rod 102. The back-pressure tanks 300 are independently connected to the hydraulic rod 102 through the micropores 300b. The micropores 300b are located at the bottoms of the back-pressure tanks 300 and the hydraulic rod 102. One end of the reset member 301 is connected to the inner wall of the back-pressure tank 300, and the other end is movably sleeved in the tank chamber 300a. The reset member 301 is composed of a reset spring 301a and a secondary piston 301b. One end of the reset spring 301a is connected to the inner wall of the back-pressure tank 300, and the other end is connected to the secondary piston 301b. The secondary piston 301b is arranged in the tank chamber 300a. There are 4 back-pressure tanks on the outer surface of the hydraulic rod 102 in the figure. The number of back-pressure tanks depends on whether its own capacity matches that of the hydraulic rod. However, arranging multiple back-pressure tanks around the hydraulic rod can disperse the hydraulic action and further improve the more linear buffering effect;
[0037] During use, when the car accidentally descends and contacts the top plate 105, the system starts to operate. At this time, the extension rod 104 is pressured to move downward, causing the limiting strip 104a to be in close contact with the limiting locking disc 102b, generating frictional resistance and slowing down the descending speed of the car. Then, the main piston 104b compresses the medium in the hydraulic chamber 102c, resulting in an increase in the temperature of the medium. This process absorbs and converts the falling energy. At the same time, the pressurized medium enters the tank chamber 300a of the back-pressure tank 300 through the micropores 300b, forcing the secondary piston 301b to move upward and further consuming the kinetic energy. In addition, the buffer spring 103 is compressed to provide an additional buffering effect. The deformation member 200 will also deform after being pressured. (The deformation member 200 can be an elastic steel plate) Together with the top plate 105, it forms a stable support plane 201 to ensure that the car is fully supported in the final stage, thus completing the entire buffering process.
[0038] Importantly, it should be noted that the construction and arrangement of the present application shown in multiple different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who refer to this disclosure should easily understand that many modifications are possible without substantially departing from the novel teachings and advantages of the subject matter described in this application (e.g., changes in the dimensions, scales, structures, shapes and proportions of various elements, as well as parameter values (such as temperature, pressure, etc.), installation arrangements, use of materials, colors, orientations, etc.). For example, elements shown as integrally formed may be composed of multiple parts or elements, the positions of the elements may be inverted or otherwise changed, and the nature, number or position of discrete elements may be altered or changed. Accordingly, all such modifications are intended to be included within the scope of the present utility model. The order or sequence of any process or method steps may be changed or re-ordered according to alternative embodiments. In the claims, any clause of "means-plus-function" is intended to cover the structures that perform the functions described herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present utility model. Therefore, the present utility model is not limited to specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.
[0039] In addition, in order to provide a concise description of the exemplary embodiments, not all features of the actual embodiments may be described (i.e., those features that are not relevant to the currently contemplated best mode of carrying out the present utility model or those features that are not relevant to the implementation of the present utility model).
[0040] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous specific implementation decisions may be made. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, without undue experimentation, such development efforts will be a routine task of design, manufacturing and production.
[0041] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model may be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present utility model, and they should all be covered within the scope of the claims of the present utility model.
Claims
1. A hydraulic buffer rod at the bottom of an elevator shaft, comprising a buffer rod body (100), characterized in that: The buffer rod body (100) includes a hydraulic rod (102) and a supporting part connected thereto. A deformation member (200) is provided between the supporting part and the hydraulic rod (102). A back-pressure tank (300) is communicated with the outer surface of the hydraulic rod (102). When the elevator car hits the supporting part and drops, the upper part of the deformation member (200) bends to jointly form a supporting plane (201) with the top of the supporting part, which abuts against the bottom of the elevator car. And the medium inside the hydraulic rod (102) enters the tank chamber (300a) of the back-pressure tank (300) through a narrow channel, so that the reset member (301) inside the back-pressure tank (300) is compressed.
2. The hydraulic buffer rod at the bottom of the elevator shaft according to claim 1, characterized in that: The supporting part is an extension rod (104) arranged in the hydraulic chamber (102c) through a main piston (104b). A top plate (105) is provided on the extension rod (104), and a buffer spring (103) is provided between the top plate (105) and the gasket (102a) of the hydraulic rod (102).
3. The hydraulic buffer rod at the bottom of the elevator shaft according to claim 2, characterized in that: A limiting strip (104a) is annularly provided on the extension rod (104), and a limiting locking disc (102b) is provided at the top of the hydraulic rod (102). The limiting locking disc (102b) is sleeved in cooperation with the limiting strip (104a).
4. The hydraulic buffer rod at the bottom of the elevator shaft according to claim 3, characterized in that: The limiting locking disc (102b) is composed of two pieces spliced together.
5. The hydraulic buffer rod at the bottom of the elevator shaft according to claim 1, wherein: There are several back-pressure tanks (300), which are annularly arranged on the outer surface of the hydraulic rod (102). And the back-pressure tank (300) is independently communicated with the hydraulic rod (102) through a micropore (300b). The micropore (300b) is located at the bottom of the back-pressure tank (300) and the hydraulic rod (102). One end of the reset member (301) is connected to the inner wall of the back-pressure tank (300), and the other end is movably sleeved in the tank chamber (300a).
6. The hydraulic buffer rod at the bottom of the elevator shaft according to claim 1 or 5, characterized in that: The reset member (301) is composed of a reset spring (301a) and a secondary piston (301b). One end of the reset spring (301a) is connected to the inner wall of the back-pressure tank (300), and the other end is connected to the secondary piston (301b). The secondary piston (301b) is arranged in the tank chamber (300a).
7. The hydraulic buffer rod at the bottom of the elevator shaft according to claim 6, characterized in that: The medium in the tank chamber (300a) and the hydraulic chamber (102c) is communicated through the micropore (300b).
8. The hydraulic buffer rod at the bottom of the elevator shaft according to claim 2, wherein: A base (101) is provided at the bottom of the hydraulic rod (102). One end of the deformation member (200) is connected to the top plate (105), and the other end is connected to the base (101).