Hydraulic damper with display of buffer stroke

Abstract

The utility model relates to hydraulic buffer technical field especially relates to a kind of hydraulic buffer with buffer stroke display, its technical scheme includes cylinder, clamping groove and shock absorber, the cylinder is the hollow cylinder with opening being equipped in top, and the inside of cylinder is filled with hydraulic oil, the bottom of cylinder is welded with base, and the area of base is greater than the area of cylinder.The utility model is designed with several through holes of different hole diameters in the inside of piston disc, and the hole diameter of single through hole is consistent up and down, so when buffer works, hydraulic oil can pass through from through hole respectively backward under the condition of being subjected to huge pressure, thereby playing the role of progressive buffering protection to piston disc and the assembly of its top, and when the hole diameter is consistent up and down, the production and manufacture of piston disc is relatively simple, and the production cost is relatively low, which is conducive to the large-scale popularization of progressive hydraulic buffer.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic damper technology, specifically a hydraulic damper with a damping stroke display. Background Technology

[0002] A hydraulic damper is a device installed at the bottom of an elevator shaft to protect the elevator from bottoming out in emergency situations. It can provide a certain degree of cushioning protection for the elevator car after it falls, preventing the elevator car from directly colliding with the ground, thereby protecting the people inside the elevator and reducing the risk of elevator and personnel loss.

[0003] The existing technology still has the following drawbacks in its use: 1. In the prior art, when hydraulic dampers use specially designed channels to guide hydraulic oil, in order to achieve a gradual buffering effect, the channels need to be specially designed. By designing multiple channels with progressively larger diameters, the hydraulic oil can buffer pressure changes as it passes through the piston disc. However, the manufacturing process of such piston disc channels is relatively complex and the production cost is high, which makes it difficult to popularize and limits the scope of application. 2. In the existing technology, the hydraulic buffer only provides one-time buffer protection for the elevator car. Therefore, the performance and stability of the hydraulic buffer are subject to high requirements. Once the internal buffer fails, the elevator car will not be able to receive effective buffering.

[0004] Therefore, we propose a hydraulic damper with a buffer stroke display to solve the existing problems. Utility Model Content

[0005] The purpose of this invention is to provide a hydraulic damper with a buffer stroke display to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a hydraulic damper with a buffer stroke display, comprising a cylinder, a slot and a shock absorber rod, wherein the cylinder is a hollow cylindrical object with an opening at the top, and the inside of the cylinder is filled with hydraulic oil, and a base is welded to the bottom of the cylinder, and the area of ​​the base is larger than the area of ​​the cylinder. The cylinder is fixedly installed with slots on both sides, and an arched plate is movably installed inside the slots; A shock-absorbing rod is movably installed inside the cylinder, and the top of the shock-absorbing rod extends beyond the top of the cylinder. A limit groove is provided longitudinally inside the shock-absorbing rod.

[0007] Preferably, a sealing ring is fixedly installed on the top of the cylinder, and the inner wall of the sealing ring is in contact with the side of the shock absorber rod.

[0008] Preferably, a guide rod is fixedly installed longitudinally at the bottom of the cylinder body, and the top of the guide rod extends into the interior of the shock absorber rod.

[0009] Preferably, snap-fit ​​sleeves are fixedly installed on both sides of the top of the arched plate, and a buffer plate is snap-fitted into the inside of the snap-fit ​​sleeves.

[0010] Preferably, the buffer plate adopts an arc-shaped plate structure, and both ends of the buffer plate are provided with buckles extending into the inside of the snap-fit ​​sleeve.

[0011] Preferably, a return spring is fitted on the outer side of the shock absorber rod, the bottom of the return spring is fixedly connected to the top of the cylinder, and the top of the return spring is fixedly connected to the top of the shock absorber rod.

[0012] Preferably, a piston disc is fixedly installed at the bottom end of the shock absorber rod, and several sealing rings are fixedly installed on the side of the piston disc, with the sealing rings fitting against the inner wall of the cylinder. Several guide plates are fixedly installed at equal intervals on the top of the piston disc.

[0013] Preferably, the piston disc has a plurality of through holes longitudinally arranged inside. The plurality of through holes are arranged in a circular array with the center of the piston disc as the center. The diameters of the plurality of through holes are not the same. The diameters of the plurality of through holes increase sequentially. Except for the first and last through holes, the diameters of the other two adjacent sets of through holes differ by one centimeter.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model has several through holes of different diameters inside the piston disc, and the diameter of each through hole is the same from top to bottom. Therefore, when the buffer is working, the hydraulic oil can pass through the through holes of different diameters according to the huge pressure when the buffer is working, thereby playing a progressive buffering and protection role for the piston disc and its top components. When the diameter of the holes is the same from top to bottom, the manufacturing of the piston disc is simpler and the production cost is relatively low, which is conducive to the large-scale popularization of progressive hydraulic buffers.

[0015] 2. This utility model, by installing a buffer plate on the top of the arched plate, can provide a buffer for the elevator car before it comes into contact with the arched plate. Under the huge pressure applied by the elevator car, the buckles on both sides of the buffer plate can break open and the snap-fit ​​sleeve can be broken, thus changing the arc-shaped plate into a straight plate structure, which is placed between the arched plate and the elevator car. Together with the hydraulic buffer, it provides a secondary buffer protection for the elevator car, improving the buffering effect of the hydraulic buffer. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional internal structure diagram of the present invention; Figure 3 This is a schematic diagram of the front external structure of this utility model; Figure 4 This is a schematic diagram of the internal structure of the present invention from the front. Figure 5 This is a partial top view of the structure of this utility model.

[0017] In the diagram: 1. Cylinder; 101. Base; 102. Sealing ring; 103. Guide rod; 2. Slot; 201. Snap-fit ​​sleeve; 202. Arched plate; 203. Buffer plate; 3. Shock absorber rod; 301. Return spring; 302. Piston disc; 303. Through hole; 304. Guide plate. Detailed Implementation

[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] like Figure 1 - Figure 5 As shown, the present invention proposes a hydraulic buffer with a buffer stroke display, including a cylinder 1, a slot 2, and a shock absorber 3. The cylinder 1 is a hollow cylindrical object with an opening at the top, and the inside of the cylinder 1 is filled with hydraulic oil. A base 101 is welded to the bottom of the cylinder 1, and the area of ​​the base 101 is larger than the area of ​​the cylinder 1. The cylinder 1 can provide a mounting position for surrounding components and can store a certain amount of hydraulic oil so that the flow of hydraulic oil inside the cylinder 1 can provide buffer protection for the elevator. The base 101 can fix the bottom of the cylinder 1 to ensure the stability of the device during operation. The cylinder 1 has slots 2 fixedly installed on both sides. An arched plate 202 is movably installed inside the slots 2. The slots 2 can engage and limit the arched plate 202, so that the arched plate 202 can move longitudinally synchronously with the shock absorber 3. Under the limiting action of the slots 2, the arched plate 202 remains vertical when moving longitudinally. Furthermore, the relative movement of the slots 2 and the arched plate 202 can make the buffer stroke visible, thereby judging the buffer effect. A shock absorber rod 3 is movably installed inside the cylinder 1, and the top of the shock absorber rod 3 extends beyond the top of the cylinder 1. A limit groove is set longitudinally inside the shock absorber rod 3, allowing the shock absorber rod 3 to move vertically within the cylinder 1. This allows it to cooperate with the cylinder 1 and the hydraulic oil inside to provide buffer protection for the elevator. The limit groove can cooperate with the guide rod 103 to keep the shock absorber rod 3 in a vertical state when it moves up and down inside the cylinder 1, preventing the shock absorber rod 3 from deviating and affecting the structural stability and buffering effect of the device.

[0020] Furthermore, a sealing ring 102 is fixedly installed on the top of the cylinder 1, and the inner wall of the sealing ring 102 fits against the side of the shock absorber 3. The sealing ring 102 can improve the sealing between the cylinder 1 and the shock absorber 3, thereby preventing the hydraulic oil inside the cylinder 1 from leaking when the shock absorber 3 moves in and out.

[0021] Furthermore, a guide rod 103 is fixedly installed longitudinally at the bottom of the cylinder 1, and the top of the guide rod 103 extends into the interior of the shock absorber 3. The guide rod 103 can cooperate with the limiting groove inside the shock absorber 3 to restrict the movement direction of the shock absorber 3, so that the shock absorber 3 always remains vertical during the up and down movement, preventing the shock absorber 3 from deviating during the movement, and ensuring the stability and buffering effect of the overall structure of the device.

[0022] Furthermore, snap-fit ​​sleeves 201 are fixedly installed on both sides of the top of the arched plate 202, and a buffer plate 203 is snap-fitted inside the snap-fit ​​sleeves 201. The snap-fit ​​sleeves 201 can provide an installation position for the buffer plate 203 and facilitate the installation and removal of the buffer plate 203. At the same time, they can also limit the buffer plate 203 to a certain extent, so that the buffer plate 203 can be stably installed on the arched plate 202 under normal conditions.

[0023] Furthermore, the buffer plate 203 adopts an arc-shaped plate structure, and both ends of the buffer plate 203 are provided with buckles extending into the snap-fit ​​sleeve 201. The arc-shaped plate structure can better adapt to the shape of the elevator car when in contact, playing a preliminary buffering role. The buckles can fit tightly with the snap-fit ​​sleeve 201, ensuring the connection stability between the buffer plate 203 and the arched plate 202 under normal conditions. When subjected to great pressure, the buckles pry open the snap-fit ​​sleeve 201, and the buffer plate 203 can be transformed into a straight plate structure, further enhancing the buffering effect.

[0024] Furthermore, a return spring 301 is fitted on the outer side of the shock absorber rod 3. The bottom of the return spring 301 is fixedly connected to the top of the cylinder 1, and the top of the return spring 301 is fixedly connected to the top of the shock absorber rod 3. The return spring 301 can provide an upward elastic force when the shock absorber rod 3 is subjected to pressure and moves downward, helping the shock absorber rod 3 to return to its initial position after the buffering process is completed, so that the next buffering operation can be carried out. At the same time, it can also assist the buffering to a certain extent and improve the buffering effect.

[0025] Furthermore, a piston disc 302 is fixedly installed at the bottom end of the shock absorber rod 3. Several sealing rings are fixedly installed on the side of the piston disc 302, and the sealing rings are in contact with the inner wall of the cylinder 1. The piston disc 302 can move inside the cylinder 1 under the drive of the shock absorber rod 3. By changing the volume and pressure of the hydraulic oil inside the cylinder 1, a buffering effect is achieved. The sealing rings can ensure the sealing between the piston disc 302 and the inner wall of the cylinder 1, preventing hydraulic oil leakage and affecting the buffering effect.

[0026] Furthermore, several guide plates 304 are fixedly installed at equal intervals on the top of the piston disc 302. The guide plates 304 can guide the flow direction of the hydraulic oil when the piston disc 302 moves, so that the hydraulic oil can pass through the through holes 303 on the piston disc 302 in a more orderly manner, thereby improving the stability and effect of the buffer.

[0027] Furthermore, the piston disc 302 has several through holes 303 arranged longitudinally inside. These through holes 303 are arranged in a circular array with the center of the piston disc 302 as the center. The diameters of the through holes 303 are not the same, and the diameters of the through holes 303 increase sequentially. Except for the first and last through holes 303, the diameters of the other two adjacent sets of through holes 303 differ by one centimeter. This allows hydraulic oil to pass through the through holes 303 of different diameters sequentially when under pressure, thus achieving progressive buffer protection for the piston disc 302 and its top components. At the same time, the design of consistent diameters at the top and bottom simplifies the manufacturing process of the piston disc 302 and reduces production costs.

[0028] Working principle: When the hydraulic buffer is impacted by an external force, the shock absorber 3 will move downward along the guide rod 103. At this time, the return spring 301 is compressed, generating elastic potential energy. At the same time, the piston disc 302 moves downward in the cylinder 1. Since the piston disc 302 is provided with a guide plate 304 and has several through holes 303 with different diameters, the hydraulic oil will be obstructed when passing through these through holes 303 and the guide plate 304, thereby converting kinetic energy into heat energy and playing a buffering role. When the external force disappears, the return spring 301 releases its elastic potential energy, pushing the damping rod 3 upward and causing the piston disc 302 to return to its initial position, completing one buffer stroke. Throughout the buffering process, the cooperation between the buffer plate 203 and the snap-fit ​​sleeve 201 further enhances the buffering effect and reduces the impact of vibration and shock on the equipment.

[0029] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A hydraulic damper with a buffer stroke display, comprising a cylinder (1), a slot (2), and a shock absorber rod (3), characterized in that: The cylinder (1) is a hollow cylindrical object with an opening at the top, and the inside of the cylinder (1) is filled with hydraulic oil. A base (101) is welded to the bottom of the cylinder (1), and the area of ​​the base (101) is larger than the area of ​​the cylinder (1). The cylinder (1) is fixedly installed with slots (2) on both sides, and an arched plate (202) is movably installed inside the slots (2). The cylinder (1) is movably installed with a shock absorber rod (3), and the top of the shock absorber rod (3) extends out of the top of the cylinder (1). The shock absorber rod (3) is provided with a limit groove in the longitudinal direction inside.

2. A hydraulic damper with a buffer stroke display according to claim 1, characterized in that: A sealing ring (102) is fixedly installed on the top of the cylinder (1), and the inner wall of the sealing ring (102) is in contact with the side of the shock absorber (3).

3. A hydraulic damper with a buffer stroke display according to claim 1, characterized in that: The bottom of the cylinder (1) is fixedly mounted longitudinally with a guide rod (103), and the top of the guide rod (103) extends into the interior of the shock absorber rod (3).

4. A hydraulic damper with a buffer stroke display according to claim 1, characterized in that: The top two sides of the arched plate (202) are fixedly installed with snap-fit ​​sleeves (201), and a buffer plate (203) is snap-fitted inside the snap-fit ​​sleeves (201).

5. A hydraulic damper with a buffer stroke display according to claim 4, characterized in that: The buffer plate (203) adopts an arc-shaped plate structure, and both ends of the buffer plate (203) are provided with buckles extending into the snap sleeve (201).

6. A hydraulic damper with a buffer stroke display according to claim 1, characterized in that: A return spring (301) is fitted on the outside of the shock absorber (3). The bottom of the return spring (301) is fixedly connected to the top of the cylinder (1), and the top of the return spring (301) is fixedly connected to the top of the shock absorber (3).

7. A hydraulic damper with a buffer stroke display according to claim 1, characterized in that: A piston disc (302) is fixedly installed at the bottom end of the shock absorber (3). Several sealing rings are fixedly installed on the side of the piston disc (302), and the sealing rings are in contact with the inner wall of the cylinder (1). Several guide plates (304) are fixedly installed at equal intervals on the top of the piston disc (302).

8. A hydraulic damper with a buffer stroke display according to claim 7, characterized in that: The piston disc (302) has a number of through holes (303) arranged longitudinally inside. The through holes (303) are arranged in a circular array with the center of the piston disc (302) as the center. The diameters of the through holes (303) are not the same. The diameters of the through holes (303) increase sequentially. Except for the first and last through holes (303), the diameters of the other two adjacent sets of through holes (303) differ by one centimeter.

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