Elevator plunger cover device with oil leakage prevention structure

Abstract

This invention relates to the field of elevator technology and discloses an elevator plunger cover device with an oil-leakage-proof structure, comprising: a housing with a protective sleeve fitted onto its upper end; a connecting seat including a disc and a threaded column, the disc being fixedly disposed at the center of the inner side of the housing, forming a buffer ring groove between the disc and the inner side wall of the housing, a sealing ring and a sealing air cushion being fixedly disposed on the bottom surface, the threaded column being fixedly disposed below the sealing air cushion, and a reserved groove being opened on the bottom surface; a reinforcing frame being fixedly disposed within the buffer ring groove, with several empty grooves evenly formed on its inner side; and a buffer block being fixedly disposed within each empty groove on the inner side of the reinforcing frame, with its bottom surface flush with the bottom surface of the disc. The advantages of this invention are: it has a highly efficient and reliable impact-resistant mechanical structure, and maintains good oil-leakage-proof performance under strong impact.

Description

Technical Field

[0001] This invention relates to the field of elevator technology, specifically to an elevator plunger cover device with an oil-leakage-proof structure. Background Technology

[0002] The hydraulic fall arrestor at the bottom of the elevator, with a hydraulic buffer at its core, is the final fall arrest safety device installed at the bottom of the shaft, serving as the last line of defense in the elevator's multi-layered protection system. When the car falls at excessive speed or the safety brake fails, posing a risk of bottoming out, the piston of the impact device engages, and the hydraulic oil in the cylinder generates damping resistance through a throttling orifice, converting the kinetic energy of the fall into heat energy and dissipating it smoothly, achieving gradual deceleration and stopping. This device provides smooth, rebound-free cushioning, eliminating rigid impacts and secondary injuries. It is compatible with elevators across all speed ranges, significantly reducing impact damage and comprehensively protecting passenger safety and the integrity of elevator equipment. It is a mandatory safety component standard on all elevators.

[0003] Existing elevator hydraulic anti-fall buffer devices have significant safety shortcomings. When subjected to the instantaneous, powerful impact of a falling car, the sealing parts of the plunger cover structure are highly susceptible to deformation and damage, posing a serious risk of hydraulic oil leakage. This significantly reduces the buffering and braking effect, jeopardizing safety. Currently, these devices generally lack efficient anti-impact and leak-proof sealing components suitable for high-intensity impact conditions. Furthermore, the plunger cover itself lacks a reinforced anti-impact mechanical structure, exhibiting weak impact and deformation resistance, and is unable to reliably withstand instantaneous, high-load impacts. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes an elevator plunger cover device with an oil-proof structure that features a highly efficient and reliable impact-resistant mechanical structure and maintains good oil-proof performance under strong impact.

[0005] To solve the above-mentioned technical problems, the technical solution proposed by this invention is: an elevator plunger cover device with an oil leakage prevention structure, comprising: The housing has a protective sleeve fitted onto its upper end; The connecting seat includes a disc and a threaded post. The disc is fixedly disposed at the center of the inner side of the housing, forming a buffer annular groove between it and the inner sidewall of the housing. A sealing ring and a sealing gasket are fixedly disposed on the bottom surface. The threaded post is fixedly disposed below the sealing gasket, and a reserved groove is opened on the bottom surface. The reinforced frame is fixedly placed inside the buffer ring groove, with several empty grooves evenly formed on the inner side. The buffer blocks are fixedly installed in the slots inside the reinforced frame, with their bottom surfaces flush with the bottom surface of the disc.

[0006] Furthermore, the outer wall of the housing is uniformly covered with anti-slip textures.

[0007] Furthermore, the upper end of the side wall of the housing is provided with an annular groove, and the inner wall of the protective sleeve is provided with a convex ring that matches the annular groove.

[0008] Furthermore, the protective sleeve is made of rubber and has an integrally molded anti-slip texture.

[0009] Furthermore, the sealing ring, sealing gasket, and threaded post are all coaxially arranged with the disk, and the diameter of the sealing gasket is larger than the diameter of the threaded post but smaller than the diameter of the sealing ring.

[0010] Furthermore, the sealing gasket is a hollow circular plate with several folded annular grooves on its side wall, and its bottom surface is flush with the bottom surface of the sealing ring after compression and folding.

[0011] Furthermore, the reinforcing frame consists of two annular plates and several partitions. The annular plates have different diameters and are coaxial with the shell. They are fixedly installed on the upper wall of the buffer annular groove. The partitions are fixedly installed between the two annular plates and are distributed equidistantly in a divergent manner around the center of the annular plates. Their two ends pass through the annular plates and are fixedly connected to the inner side wall of the shell and the outer side wall of the disk, respectively.

[0012] Furthermore, the buffer block is a rubber block, with its upper wall fixedly connected to the upper wall inside the buffer ring groove, and its side walls tightly fitted to the annular plate and the partition.

[0013] Compared with existing technologies, the advantages of this invention are as follows: The protective sleeve is made of rubber, making direct contact with the falling elevator car, effectively resisting and buffering impacts. The anti-slip textured surface prevents lateral displacement of the elevator car, ensuring safety and reliability. The device includes a reinforcing frame and buffer blocks. The reinforcing frame is fixedly connected to the shell and disc via annular plates of different diameters and radiating partitions, improving overall connection strength and achieving uniform force distribution through the slotted design. This stably resists the instantaneous strong load impact generated by the falling car, preventing deformation and damage to the plunger cover itself. The buffer blocks, also made of rubber, fit tightly against the frame structure, effectively absorbing operational vibrations during impacts, reducing component loosening, and further enhancing impact resistance.

[0014] The device is equipped with sealing components adapted for high-intensity impact conditions. The sealing ring and the hollow circular sealing gasket work together, and the folded annular groove of the sealing gasket allows for stable folding. After compression, it is flush with the sealing ring, ensuring a tight seal. Simultaneously, the sealing structure is coaxially arranged with the threaded column and disc, with a reasonable diameter matching to ensure even force distribution in a centered position, significantly reducing the risk of deformation of the sealing area and hydraulic oil leakage during impact. The pre-reserved groove can temporarily store overflowing oil, preventing spillage and providing excellent oil leakage prevention. Attached Figure Description

[0015] Figure 1 This is the three-dimensional representation of the present invention. Figure 1 ; Figure 2 This is the three-dimensional representation of the present invention. Figure 2 ; Figure 3 This is the front view of the present invention; Figure 4 This is a schematic diagram showing the state of the present invention after the protective cover has been removed.

[0016] As shown in the figure: 1. Shell; 2. Protective sleeve; 3. Disc; 4. Threaded post; 5. Sealing ring; 6. Sealing air cushion; 7. Reserved groove; 8. Buffer block; 9. Annular groove; 10. Anti-slip ridge; 11. Annular plate; 12. Partition. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings.

[0018] Combined with appendix Figure 2 Appendix Figure 3 Appendix Figure 4 An elevator plunger cover device with an oil leakage prevention structure includes: a housing 1, wherein the outer wall of the housing 1 is evenly distributed with anti-slip texture to increase the friction between the hand and the housing 1 during disassembly and assembly, so as to facilitate quick tightening or disassembly of the plunger cover device.

[0019] Combined with appendix Figure 2 Appendix Figure 3 Appendix Figure 4 A protective sleeve 2 is fitted onto the upper end of the housing 1. An annular groove 9 is provided on the upper end of the side wall of the housing 1. A convex ring matching the annular groove 9 is provided on the inner wall of the protective sleeve 2. The annular groove 9 and the convex ring engage to secure the protective sleeve 2, making it more secure and less prone to loosening or falling off. The protective sleeve 2 is made of rubber and has an integrally formed anti-slip texture 10 on its surface, which can cushion impacts and effectively protect the car and plunger cover.

[0020] Combined with appendix Figure 1 Appendix Figure 3 Appendix Figure 4 The connecting seat includes a disc 3 and a threaded post 4. The disc 3 is fixedly disposed at the center of the inner side of the housing 1, forming a buffer ring groove between it and the inner side wall of the housing 1. A sealing ring 5 and a sealing air cushion 6 are fixedly disposed on the bottom surface. The sealing air cushion 6 is a hollow circular plate with several folding ring grooves on its side wall, which can achieve stable folding and ensure good sealing performance. After compression and folding, its bottom surface is flush with the bottom surface of the sealing ring 5, which can ensure sealing fit and oil leakage prevention performance.

[0021] Combined with appendix Figure 1 Appendix Figure 3 Appendix Figure 4 The threaded post 4 is fixedly installed below the sealing gas pad 6, and a reserved groove 7 is provided on the bottom surface. The sealing ring 5, the sealing gas pad 6 and the threaded post 4 are all coaxially arranged with the disc 3. The diameter of the sealing gas pad 6 is larger than the diameter of the threaded post 4 and smaller than the diameter of the sealing ring 5, so as to ensure that the sealing structure is centered and the force is even, thereby improving the oil leakage prevention and sealing effect.

[0022] Combined with appendix Figure 1 The reinforcing frame is fixedly installed in the buffer ring groove, and several empty grooves are evenly formed on the inner side. The reinforcing frame consists of two annular plates 11 and several partition plates 12. The annular plates 11 have different diameters and are all coaxial with the shell 1. They are fixedly installed on the upper wall of the buffer ring groove. The partition plates 12 are fixedly installed between the two annular plates 11 and are distributed equidistantly in a divergent manner around the center of the annular plates 11. Their two ends pass through the annular plates 11 and are fixedly connected to the inner wall of the shell 1 and the outer wall of the disk 3, respectively. This not only improves the connection strength between the shell 1 and the disk 3, but also evenly separates stable empty grooves.

[0023] Combined with appendix Figure 1 The buffer block 8 is fixedly installed in each slot inside the reinforced frame, with its bottom surface flush with the bottom surface of the disc 3. The buffer block 8 is a rubber block, with its upper wall fixedly connected to the upper wall inside the buffer ring groove, and its side wall tightly attached to the annular plate 11 and the partition plate 12. It can absorb the working vibration when the plunger is subjected to severe impact and reduce structural loosening.

[0024] Specific embodiments of the present invention: Using the anti-slip texture on the outer wall of the housing 1, the device is quickly aligned with the elevator plunger cover installation position on the elevator hydraulic anti-fall buffer device, and then tightened and fixed using the threaded post 4. The sealing ring 5 on the bottom surface of the disc 3 tightly fits the installation end face of the sealing air cushion 6. The folded annular groove of the sealing air cushion 6 is compressed and folded to seal the connection. After compression, it is flush with the sealing ring 5, ensuring the sealing fit of the sealing ring 5 and preventing hydraulic oil leakage. During assembly, the protective sleeve 2 is engaged and fixed with the annular groove 9 at the upper end of the housing 1 through the inner wall protrusion. The rubber protective sleeve 2 and the surface anti-slip texture 10 can be prepared for protection in advance.

[0025] When the elevator car falls, the protective sleeve 2 directly contacts the elevator car, buffering the impact of the car's movement. The anti-slip ridges on the protective sleeve 2 increase the friction of the contact surface, preventing the car from shifting laterally. The annular plate 11 and partition plate 12 of the reinforced frame firmly connect the shell 1 and the disc 3, dispersing the load transmitted by the car. The buffer block 8 in the slot absorbs the vibration of the plunger during operation, preventing components from loosening. When the hydraulic anti-fall buffer device is under pressure, if a small amount of oil overflows, the reserved slot 7 can temporarily store the oil to prevent further spillage.

[0026] During maintenance, use the anti-slip texture of the housing 1 to unscrew the device, check the integrity of the sealing ring 5 and the sealing gasket 6, clean the residual oil in the reserved groove 7, and at the same time check whether the protective sleeve 2 is loose and whether the buffer block 8 is aged. Replace the damaged parts in time, and then reassemble to continue use.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; those skilled in the art can understand the specific meaning of the above term in this invention according to the specific circumstances.

[0028] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. An elevator plunger cover device with an oil-leakage-proof structure, characterized in that, include: The housing (1) has a protective sleeve (2) fitted onto its upper end. The connecting seat includes a disc (3) and a threaded post (4). The disc (3) is fixedly disposed at the center of the inner side of the housing (1) and forms a buffer ring groove with the inner side wall of the housing (1). A sealing ring (5) and a sealing air cushion (6) are fixedly disposed on the bottom surface. The threaded post (4) is fixedly disposed below the sealing air cushion (6) and a reserved groove (7) is opened on the bottom surface. The reinforced frame is fixedly placed inside the buffer ring groove, with several empty grooves evenly formed on the inner side. The buffer block (8) is fixedly installed in each slot inside the reinforced frame, with its bottom surface flush with the bottom surface of the disc (3).

2. The elevator plunger cover device with an oil-leakage-proof structure according to claim 1, characterized in that: The outer wall of the shell (1) is uniformly covered with anti-slip textures.

3. The elevator plunger cover device with an oil-leakage prevention structure according to claim 1, characterized in that: The upper end of the side wall of the housing (1) is provided with an annular groove (9), and the inner wall of the protective sleeve (2) is provided with a convex ring that matches the annular groove (9).

4. The elevator plunger cover device with an oil-leakage-proof structure according to claim 1, characterized in that: The protective sleeve (2) is made of rubber and has anti-slip ridges (10) integrally formed on it.

5. The elevator plunger cover device with an oil-leakage-proof structure according to claim 1, characterized in that: The sealing ring (5), sealing gasket (6) and threaded post (4) are all coaxially arranged with the disc (3), and the diameter of the sealing gasket (6) is greater than the diameter of the threaded post (4) and less than the diameter of the sealing ring (5).

6. The elevator plunger cover device with an oil-leakage-proof structure according to claim 1, characterized in that: The sealing gasket (6) is a hollow circular plate with several folded ring grooves on its side wall. After compression and folding, its bottom surface is flush with the bottom surface of the sealing ring (5).

7. The elevator plunger cover device with an oil-leakage-proof structure according to claim 1, characterized in that: The reinforcing frame consists of two annular plates (11) and several partitions (12). The annular plates (11) have different diameters and are coaxial with the shell (1). They are fixedly installed on the upper wall of the buffer ring groove. The partitions (12) are fixed between the two annular plates (11) and are distributed equidistantly in a divergent manner around the center of the annular plates (11). Their two ends pass through the annular plates (11) and are fixedly connected to the inner side wall of the shell (1) and the outer side wall of the disk (3) respectively.

8. The elevator plunger cover device with an oil-leakage-proof structure according to claim 7, characterized in that: The buffer block (8) is a rubber block, with its upper wall fixedly connected to the upper wall inside the buffer ring groove, and its side wall tightly attached to the annular plate (11) and the partition plate (12).

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