Elevator car wall panel connection structure

Abstract

The application discloses an elevator car wallboard connecting structure, which comprises two car wallboards which are mutually converged, a piston rod which is arranged in the two car wallboards, a lock head which is arranged at the top end of the piston rod, and a lock seat which is arranged at the bottom end of the piston rod, wherein an accommodating cavity which can accommodate the bottom end of the piston rod is formed in the lock seat, a sealing element is arranged at the bottom end of the piston rod, the sealing element is in sealing cooperation with the cavity wall of the accommodating cavity, and a closed negative pressure cavity is formed in the lock seat; the lock head is provided with a lifting hook part which is movably connected with the top of the piston rod; when the lock head is rotated, the lifting hook part pulls the piston rod to one side of the lock head, the volume of the negative pressure cavity is expanded, a negative pressure difference is formed, the lock seat is driven to converge to the lock head under the action of atmospheric pressure, and the two car wallboards which are converged are clamped and fixed between the lock head and the lock seat; the application only needs to manually rotate the lock head, does not need to use any special tool, and is simple, convenient and fast to operate, and the disassembly and assembly time of the car wallboards is effectively shortened.

Description

Technical Field

[0001] This invention relates to the technical field of elevator car wall panel connection, and in particular to an elevator car wall panel connection structure. Background Technology

[0002] As the main load-bearing component of the elevator system, the assembly efficiency and connection reliability of the elevator car's wall panel splicing directly affect the elevator's manufacturing cycle, subsequent operation and maintenance costs, and operational safety performance. Currently, the splicing and connection of car wall panels mostly adopt traditional rigid connection processes such as bolt and nut fastening and riveting. In order to improve assembly efficiency, some existing technologies use mechanical snap-fit ​​structures to achieve rapid splicing of wall panels.

[0003] For rigid connections such as bolts and rivets, both assembly and disassembly require specialized tools such as wrenches and electric drills. The operation is cumbersome, and disassembly and assembly at a single point takes a long time. This makes it difficult to meet the high-efficiency assembly requirements of mass production of elevator cars. Furthermore, it is inconvenient to operate when replacing wall panels during after-sales maintenance, and the maintenance cost is high. Summary of the Invention

[0004] The purpose of this invention is to provide an elevator car wall panel connection structure that only requires manual rotation of the lock head, without the need for any special tools, making the operation simple and quick, and effectively shortening the time spent on disassembling and assembling the car wall panels.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] An elevator car wall panel connection structure includes two car wall panels that are side by side, a piston rod passing through the two car wall panels, a lock head disposed at the top of the piston rod, and a lock seat disposed at the bottom of the piston rod.

[0007] The lock seat has an internal cavity into which the bottom end of the piston rod can be inserted. The bottom end of the piston rod is provided with a sealing element, which is sealed to the cavity wall of the cavity to form a closed negative pressure cavity inside the lock seat.

[0008] The lock head is provided with a lifting hook that can be movably connected to the top of the piston rod; when the lock head is rotated, the lifting hook pulls the piston rod away from the lock head, which expands the volume of the negative pressure chamber and forms a negative pressure difference. Under the action of atmospheric pressure, the lock seat moves closer to the lock head, thereby clamping and fixing the two car wall panels together between the lock head and the lock seat.

[0009] Based on the above technical solution, the present invention can be improved as follows:

[0010] Furthermore, the top of the piston rod is integrally formed with a spherical connecting part, and the lock head is movably hinged to the piston rod through the spherical connecting part, allowing the lock head to rotate freely around the spherical connecting part.

[0011] Furthermore, an annular groove is provided at the bottom end of the piston rod, and the sealing component is sleeved and fixed in the annular groove.

[0012] Furthermore, a gas storage hole is vertically opened at the center of the bottom surface of the piston rod. The gas storage hole is recessed inward to form a gas storage space. The gas storage space is connected to the receiving cavity inside the lock seat, which is used to buffer the negative pressure forming rate and balance the locking force.

[0013] Furthermore, the lock seat is a hollow integrated cylindrical structure, which is formed by an annular side wall, a closed bottom wall and a top socket to form the receiving cavity; the top socket is coaxially arranged with the receiving cavity, and the piston rod can be slidably inserted into the receiving cavity through the top socket.

[0014] Furthermore, the bottom wall of the lock seat is provided with a vent hole that connects to the receiving cavity, and an elastic airtight plug is detachably installed at the vent hole; the elastic airtight plug normally blocks the vent hole to maintain the airtightness of the cavity, and can open the vent hole under the action of external force to realize the balance of air pressure inside and outside the cavity and pressure relief and reset.

[0015] Furthermore, the lock head includes a main body and a ram's horn-shaped hook, which extends outward from one side of the main body; a smooth arc-shaped guide surface is provided on the outer side of the hook, one end of which connects to the tip of the hook and the other end of which connects to the locking surface of the main body, forming a smooth rotation locking trajectory.

[0016] Furthermore, a spherical groove is provided at the junction of the main body and the lifting hook, and a clearance groove communicating with the spherical groove is provided on the inner side of the lifting hook; the top of the piston rod is embedded in the spherical groove to form a movable hinge fit, and the clearance groove is used to make way for the rod body when the lock head rotates to pull the piston rod, thereby eliminating rotational interference.

[0017] Furthermore, the piston rod has an axially extending air storage hole, and a plunger is movably inserted into the air storage hole; the plunger includes a stop part, a rod body part, and a plug part connected in sequence, the plug part forms a sealing fit with the inner wall of the air storage hole, and a ventilation gap is left between the rod body part and the inner wall of the air storage hole; the outer diameter of the stop part is larger than the diameter of the air storage hole, and is used to stop and limit the piston rod top; two sealing members are axially spaced on the outer periphery of the bottom end of the piston rod, and a side hole is opened on the piston rod side wall between the two sealing members; the side hole radially penetrates the piston rod and connects the air storage hole with the receiving cavity of the lock seat.

[0018] Furthermore, the sealing element is a rubber sealing ring, which is interference-fitted with the piston rod, and the outer circumferential surface of the rubber sealing ring is tightly fitted with the inner wall of the receiving cavity.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] This invention utilizes the principle of negative pressure locking. Simply rotating the lock head manually lifts the piston rod via the hook on the lock head, expanding the volume of the negative pressure chamber and creating a negative pressure difference. Under atmospheric pressure, this causes the lock seat to move towards the lock head, clamping and fixing the two side panels together. Unlocking simply requires opening the airtight plug to break the negative pressure in the chamber, quickly separating the lock seat from the lock head. The entire process requires no special tools, making it simple and quick to operate. It effectively shortens the time required for disassembling and assembling the elevator car panels, fully adapting to the needs of various scenarios such as mass production of elevator cars, rapid on-site installation, and after-sales maintenance and replacement. Attached Figure Description

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Figure 1 This is a schematic diagram of the elevator car wall panel connection structure in Embodiment 1;

[0023] Figure 2 This is an exploded view of the elevator car wall panel connection structure in Embodiment 1;

[0024] Figure 3 This is a schematic diagram of the internal structure of the elevator car wall panel connection structure in Embodiment 1;

[0025] Figure 4 This is a schematic diagram of the lock head structure in Example 1;

[0026] Figure 5 This is a diagram illustrating the connection process of the elevator car wall panel connection structure in Example 1;

[0027] Figure 6 This is a schematic diagram of the elevator car wall panel connection structure in Embodiment 2;

[0028] Figure 7 This is an exploded view of the elevator car wall panel connection structure in Embodiment 2;

[0029] Figure 8 This is a schematic diagram of the internal structure of the elevator car wall panel connection structure in Embodiment 2.

[0030] The markings on the attached diagram are as follows: 1. Car wall panel; 2. Piston rod; 3. Lock head; 301. Main body; 302. Lifting hook; 4. Lock seat; 5. Annular groove; 6. Air storage hole; 7. Spherical groove; 8. Elastic airtight plug; 9. Clearance groove; 10. Rubber sealing ring; 11. Plunger; 1101. Stop; 1102. Rod body; 1103. Plug; 12. Side hole. Detailed Implementation

[0031] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. These descriptions are intended to aid in understanding the present invention but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] Example 1

[0033] See Figures 1 to 5 This embodiment relates to an elevator car wall panel connection structure, including two car wall panels 1 that are side by side, a piston rod 2 passing through the two car wall panels 1, a lock head 3 located at the top of the piston rod 2, and a lock seat 4 located at the bottom of the piston rod 2. The lock seat 4 has a receiving cavity inside which the bottom end of the piston rod 2 can be inserted. The bottom end of the piston rod 2 is provided with a sealing member, which is sealed to the cavity wall of the receiving cavity, forming a sealed negative pressure cavity inside the lock seat 4. The lock head 3 is provided with a lifting hook 302 that can be movably connected to the top of the piston rod 2. When the lock head 3 is rotated, the lifting hook 302 pulls the piston rod 2 away from the lock head 3, which expands the volume of the negative pressure cavity and forms a negative pressure difference. Under the action of atmospheric pressure, the lock seat 4 is driven to move closer to the lock head 3, thereby clamping and fixing the two side by side car wall panels 1 between the lock head 3 and the lock seat 4.

[0034] Specifically, the piston rod 2 is a cylindrical solid rod body, and the top of the piston rod 2 is integrally formed with a spherical connecting part. The spherical structure can achieve free rotation and fit at multiple angles without jamming or interference. The bottom end of the piston rod 2 is provided with an annular groove 5 to facilitate the tight installation of the sealing component.

[0035] The piston rod 2 has a vertically recessed air storage hole 6 at the center of its bottom surface. The air storage hole 6 is recessed inward to form a sealed air storage space. The air storage space is connected to the internal cavity of the lock seat 4. This can adapt to the air pressure changes during the negative pressure formation process, buffer the negative pressure forming rate, and balance the locking force. This ensures that the fastening force between the lock head 3 and the lock seat 4 is uniform and stable, and avoids local stress concentration that could lead to deformation of the wall panel.

[0036] The lock seat 4 adopts a hollow integrated elliptical cylinder structure, which is composed of an annular side wall, a closed bottom wall and a top socket. The top socket is coaxially arranged with the internal receiving cavity. The piston rod 2 can be inserted into the receiving cavity by sliding up and down through the top socket. The inner diameter of the receiving cavity matches the outer diameter of the piston rod 2, and the gap is controlled within the sealing fit range, providing basic sealing conditions for negative pressure molding.

[0037] The bottom wall of the lock base 4 has a vent hole that connects to the cavity. An elastic airtight plug 8 can be detachably installed at the vent hole. The elastic airtight plug 8 is made of highly elastic rubber. Under normal conditions, it completely seals the vent hole to ensure the absolute airtightness of the internal cavity of the lock base 4. Under the action of external force pressing or pulling, the vent hole can be opened to realize the exchange of air inside and outside the cavity and complete the pressure relief and reset.

[0038] The lock head 3 includes a main body 301 and a ram's horn-shaped hook 302. The hook 302 extends outward from one side of the main body 301. A smooth arc-shaped guide surface is provided on the outer side of the hook 302. One end of the arc-shaped guide surface is connected to the tip of the hook, and the other end is connected to the locking surface of the main body 301, forming a smooth rotation locking trajectory.

[0039] A spherical groove 7 is provided at the junction of the main body 301 and the hook part 302. Simultaneously, a clearance groove 9 communicating with the spherical groove 7 is provided on the inner side of the hook part 302. The spherical connecting part at the top of the piston rod 2 is embedded inside the spherical groove 7, achieving a hinged connection between the lock head 3 and the piston rod 2. The lock head 3 can rotate freely around the spherical connecting part. The clearance groove 9 allows space for the rod body when the lock head 3 rotates to pull the piston rod 2, completely eliminating rotational interference and ensuring smooth and complete locking. The fastening surface of the lock head 3 is a planar structure, which, after locking, adheres to the surface of the car wall panel 1, increasing the contact area and preventing stress concentration that could damage the wall panel.

[0040] In this embodiment, the sealing component is a rubber sealing ring 10. The rubber sealing ring 10 is interference-fitted into the annular groove 5 at the bottom of the piston rod 2. After the piston rod 2 is inserted into the cavity of the locking seat 4, the outer side of the rubber sealing ring 10 is tightly fitted to the inner wall of the cavity, dividing the cavity into a completely sealed independent space, blocking the airflow between the inside and outside of the cavity, and providing core sealing protection for negative pressure forming and pressure holding and locking.

[0041] During assembly, firstly, the two car wall panels 1 to be installed are precisely aligned and fitted together, with the assembly through holes of the wall panels aligned. The piston rod 2 is then inserted through the two sets of wall panels from above, so that the bottom end of the piston rod 2 is inserted into the receiving cavity of the lock seat 4. At this time, the rubber sealing ring 10 at the bottom end of the piston rod 2 is sealed and fitted with the cavity wall, forming a completely sealed negative pressure cavity inside the lock seat 4. The air storage space of the air storage hole 6 at the bottom of the piston rod 2 is connected to the negative pressure cavity and is in a normal pressure state. Then, the top lock head 3 is manually rotated. The lock head 3 rotates eccentrically with the arc-shaped guide surface that fits against the surface of the car wall panel 1 as support. During the continuous rotation of the lock head 3, the ram's horn-shaped lifting hook part 302 abuts against the ball-shaped connecting part at the top of the piston rod 2 through its inner contour surface, gradually lifting the top of the piston rod 2 upward, causing the piston rod 2 to move upward slightly. At this time, the volume of the sealed receiving cavity inside the lock seat 4 is expanded by the upward stretching of the piston rod 2. As the volume of the sealed air inside the cavity increases, according to Boyle's gas law, the mass of the air in the sealed space remains constant while its volume increases, and the internal air pressure decreases synchronously, making the air pressure inside the negative pressure cavity much lower than the external standard atmospheric pressure, forming a stable positive and negative air pressure difference. Under the continuous action of the external atmospheric pressure, the lock seat 4 is subjected to pressure in the direction of the lock head 3, causing the lock seat 4 to move upwards as a whole, so that the top surface of the lock seat 4 presses against the lower car wall panel 1, and the fastening surface of the lock head 3 presses against the upper car wall panel 1, finally clamping and fixing the two car wall panels 1 together firmly between the lock head 3 and the lock seat 4. At the same time, the air storage space of the air storage hole 6 at the bottom of the piston rod 2 can finely adjust the cavity air pressure, balance the locking force, and avoid excessive pressure damaging the wall panel, achieving adaptive pressure stabilization locking. After the lock head 3 rotates until the locking surface is completely in contact with the wall panel, it forms a mechanical limit to prevent the lock head 3 from springing back and loosening, ensuring a long-term stable locking state.

[0042] When it is necessary to disassemble, repair, or replace the car wall panel 1, there is no need to disassemble the entire structure. Simply press or pull out the elastic airtight plug 8 at the bottom of the lock seat 4 to open the vent hole on the bottom wall of the lock seat 4, allowing external air to quickly enter the negative pressure chamber. At this time, the negative pressure state of the sealed chamber is broken, and the air pressure inside and outside the chamber is quickly balanced. The atmospheric pressure difference that originally acted on the lock seat 4 completely disappears, and the clamping force between the lock head 3 and the lock seat 4 is simultaneously released. After the air pressure is balanced, there is no locking constraint between the lock seat 4 and the piston rod 2 and the lock head 3. The lock head 3 can be directly rotated in the opposite direction to release the lifting limit. Then, the piston rod 2 can be easily pulled out of the wall panel, separating the lock head 3, the wall panel, and the lock seat 4 from each other, quickly completing the wall panel disassembly operation. After disassembly, the elastic airtight plug 8 is reassembled to restore the structural airtightness, allowing for repeated use.

[0043] This embodiment utilizes a negative pressure locking principle, requiring only manual rotation of the lock head 3 to lock and opening the airtight plug to unlock. The entire process is tool-free, effectively shortening the disassembly and assembly time of the car wall panel 1. It is suitable for mass production, on-site installation, and after-sales maintenance of elevator cars. The structure employs a differential air pressure adaptive locking method. Compared to rigid screw-based locking, the negative pressure locking force is uniform and consistently stable, adapting to minor vibrations during elevator operation and slight deformation of the wall panel caused by environmental temperature changes. Simultaneously, the spherical rotation fit and arc-shaped locking structure eliminate mechanical loosening gaps, effectively preventing problems such as wall panel loosening, abnormal noise, and widening gaps that may occur during long-term operation, improving the overall assembly precision and operational safety of the car. Combined with the pressure-stabilizing design of the air storage hole 6, it prevents localized pressure concentration and protects the structural integrity of the wall panel.

[0044] Example 2

[0045] See Figures 6 to 8 The difference between this second embodiment and the first embodiment is that, in this embodiment, the air storage hole 6 on the piston rod 2 passes through the piston rod 2 axially, and a plunger 11 is movably inserted into the air storage hole 6; the plunger 11 is a cylindrical rod body arranged coaxially, and is integrally formed from top to bottom with a stop part 1101, a rod body part 1102 and a plug part 1103.

[0046] The outer diameter of the plug portion 1103 is adapted to the diameter of the air storage hole 6. It is made of elastic material and its outer peripheral wall can be tightly fitted with the inner wall of the air storage hole 6 to form a sealed fit. The diameter of the rod portion 1102 is smaller than the inner diameter of the air storage hole 6, so that an annular ventilation gap is formed between the outer wall of the rod portion 1102 and the inner wall of the air storage hole 6, ensuring that the plunger 11 can move axially along the air storage hole 6. The outer diameter of the stop portion 1101 is larger than the diameter of the air storage hole 6. When the plunger 11 moves downward to the limit position, the bottom surface of the stop portion 1101 can form a stop fit with the top surface of the spherical connecting part at the top of the piston rod 2, thereby limiting the downward limit stroke of the plunger 11 and preventing the plunger 11 from falling out of the bottom end of the air storage hole 6.

[0047] In this embodiment, two rubber sealing rings 10 are provided. Correspondingly, two annular grooves 5 are opened axially at intervals on the outer peripheral wall of the bottom end of the piston rod 2. The two rubber sealing rings 10 are respectively embedded and fixed in the corresponding annular grooves 5. A side hole 12 is opened on the piston rod 2 wall between the two annular grooves 5, which is radially penetrating the rod body. The side hole 12 connects the inner cavity of the air storage hole 6 and the receiving cavity of the lock seat 4, and the axial position of the side hole 12 is always within the sealing range of the two rubber sealing rings 10.

[0048] By driving the plunger 11 to move axially along the air storage hole 6, the plug part 1103 can be moved synchronously. The negative pressure chamber inside the lock seat 4 is connected to the inner cavity of the air storage hole 6 through the side hole 12 on the piston rod 2. The plug part 1103 of the plunger 11 divides the air storage hole 6 into upper and lower sections. Only the space of the air storage hole 6 below the plug part 1103 and the negative pressure chamber together form a complete sealed air chamber. The total volume of the air chamber changes synchronously with the position of the plug part 1103, thereby adjusting the negative pressure difference during the locking process and adapting to the usage requirements of different locking forces.

[0049] When the plunger 11 is pushed down, the plunger 1103 moves down synchronously, and the total effective volume of the sealed air chamber decreases. When the locking head 3 is rotated to pull the piston rod 2 and the volume of the negative pressure chamber expands, the pressure drop corresponding to the unit volume change is greater, and the final internal and external negative pressure difference is higher. The atmospheric pressure clamping force on the locking seat 4 increases accordingly, and the overall locking force is increased synchronously.

[0050] When the plunger 11 is pulled upward, the plunger 1103 moves upward simultaneously, increasing the total effective volume of the sealed air chamber. Under the same piston rod 2 pulling stroke, the air pressure drop in the cavity is smaller, the negative pressure difference is reduced, and the clamping force between the lock seat 4 and the lock head 3 is reduced accordingly, avoiding excessive clamping force that could damage the thin-walled decorative panel.

[0051] The above embodiments of the present invention are not intended to limit the scope of protection of the present invention. The implementation of the present invention is not limited thereto. All other modifications, substitutions or alterations made to the above structure of the present invention based on the above content of the present invention, in accordance with ordinary technical knowledge and common practice in the field, without departing from the basic technical idea of ​​the present invention, shall fall within the scope of protection of the present invention.

Claims

1. An elevator car wall panel connection structure, comprising two car wall panels side by side, a piston rod passing through the two car wall panels, a lock head disposed at the top of the piston rod, and a lock seat disposed at the bottom of the piston rod, characterized in that: The lock seat has an internal cavity into which the bottom end of the piston rod can be inserted. The bottom end of the piston rod is provided with a sealing element, which is sealed to the cavity wall of the cavity to form a closed negative pressure cavity inside the lock seat. The lock head is provided with a lifting hook that can be movably connected to the top of the piston rod; when the lock head is rotated, the lifting hook pulls the piston rod away from the lock head, which expands the volume of the negative pressure chamber and forms a negative pressure difference. Under the action of atmospheric pressure, the lock seat moves closer to the lock head, thereby clamping and fixing the two car wall panels together between the lock head and the lock seat.

2. The elevator car wall panel connection structure according to claim 1, characterized in that, The piston rod has a spherical connecting part integrally formed at the top, and the lock head is movably hinged to the piston rod through the spherical connecting part, allowing the lock head to rotate freely around the spherical connecting part.

3. The elevator car wall panel connection structure according to claim 1, characterized in that, The piston rod has an annular groove at its bottom end, and the sealing component is fitted and fixed inside the annular groove.

4. The elevator car wall panel connection structure according to claim 1, characterized in that, The piston rod has a vertically oriented air storage hole at the center of its bottom surface. The air storage hole is recessed inward to form an air storage space. The air storage space is connected to the receiving cavity inside the lock seat and is used to buffer the negative pressure forming rate and balance the locking force.

5. The elevator car wall panel connection structure according to claim 1, characterized in that, The lock base is a hollow integrated cylindrical structure, which is formed by an annular side wall, a closed bottom wall and a top socket to form the receiving cavity; the top socket is coaxially arranged with the receiving cavity, and the piston rod can be slidably inserted into the receiving cavity through the top socket.

6. The elevator car wall panel connection structure according to claim 5, characterized in that, The bottom wall of the lock seat has a vent hole that connects to the cavity. An elastic airtight plug is detachably installed at the vent hole. The elastic airtight plug normally blocks the vent hole to maintain the airtightness of the cavity. Under the action of external force, the vent hole can be opened to achieve the balance of air pressure inside and outside the cavity and pressure relief and reset.

7. The elevator car wall panel connection structure according to claim 1, characterized in that, The lock head includes a main body and a ram's horn-shaped lifting hook. The lifting hook extends outward from one side of the main body. A smooth arc-shaped guide surface is provided on the outer side of the lifting hook. One end of the arc-shaped guide surface is connected to the tip of the lifting hook, and the other end is connected to the locking surface of the main body, forming a smooth rotation locking trajectory.

8. The elevator car wall panel connection structure according to claim 7, characterized in that, A spherical groove is provided at the junction of the main body and the lifting hook. An avoidance groove communicating with the spherical groove is provided on the inner side of the lifting hook. The top of the piston rod is embedded in the spherical groove to form a movable hinge fit. The avoidance groove is used to make way for the rod when the lock head rotates to lift the piston rod.

9. The elevator car wall panel connection structure according to claim 1, characterized in that, The piston rod has an axially extending air storage hole, and a plunger is movably inserted into the air storage hole. The plunger includes a stop part, a rod body part, and a plug part connected in sequence. The plug part forms a sealing fit with the inner wall of the air storage hole, and a ventilation gap is left between the rod body part and the inner wall of the air storage hole. The outer diameter of the stop part is larger than the diameter of the air storage hole, and it is used to stop and limit the piston rod top. Two sealing members are axially spaced on the outer periphery of the bottom end of the piston rod. A side hole is opened on the piston rod side wall between the two sealing members. The side hole radially penetrates the piston rod and connects the air storage hole with the receiving cavity of the lock seat.

10. The elevator car wall panel connection structure according to any one of claims 1-9, characterized in that, The sealing element is a rubber sealing ring, which is interference-fitted with the piston rod, and the outer circumferential surface of the rubber sealing ring is tightly fitted with the inner wall of the receiving cavity.

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