High strength elevator toe plate assembly for shallow pit and method

Abstract

The application relates to the technical field of elevator car foot protection plates, and discloses a high-strength elevator foot protection plate assembly and method for a shallow pit, which comprises an upper piece foot protection plate and a lower piece foot protection plate, upper piece wing plates are arranged on the two sides of the upper piece foot protection plate, lower piece wing plates are arranged on the two sides of the lower piece foot protection plate, and a middle piece wing plate is arranged between the upper piece wing plates and the lower piece wing plates; a rotating assembly is arranged on the upper piece foot protection plate; a rotating shaft is arranged on the middle piece wing plate, an elastic assembly is arranged on the rotating shaft, and one end of the elastic assembly is arranged on the upper piece foot protection plate; a connecting rod assembly is arranged on the rotating shaft, the connecting rod assembly is connected with the lower piece foot protection plate and a bent guide wheel respectively, and the bent guide wheel is arranged on the two sides of the lower piece foot protection plate. The application simplifies the structure design of the foot protection plate, improves the strength of the foot protection plate, reduces the deformation influence caused by the foot protection plate itself, improves the practicability of the foot protection plate, prolongs the service life of the foot protection plate, and improves the economy.

Description

Technical Field

[0001] This invention relates to the field of elevator car foot protection technology, specifically to a high-strength elevator foot protection assembly and method for shallow pits. Background Technology

[0002] With the increasing demand for shallow-pit elevator shafts in the elevator industry, elevator foot protection plates with variable vertical height are becoming more and more common in shallow pits. The national standard GB / T 7588.1-2020 stipulates that the vertical height of the foot protection plate should not be less than 750mm. The foot protection plate should be able to withstand a static force of 300N acting perpendicularly from the landing point towards the lower edge of the vertical portion of the foot protection plate, evenly distributed over a circular (or square) area of ​​5cm². The permanent deformation of the foot protection plate should not exceed 1mm, and the elastic deformation should not exceed 35mm.

[0003] According to the aforementioned regulations, foot protectors must meet both the requirements for vertical height variation and the requirements for deformation control under vertical forces during production, making the design of foot protectors extremely challenging. While existing foot protectors have various foldable structures to shorten the vertical distance, they still cannot effectively control deformation during use, resulting in a shorter lifespan and poor overall economic efficiency.

[0004] Therefore, to address the problem that existing toe protection plate structures cannot simultaneously accommodate changes in vertical height and vertical stress strength, a high-strength elevator toe protection plate assembly and method for shallow pits are provided. Summary of the Invention

[0005] The present invention aims to provide a high-strength elevator foot protection plate assembly and method for shallow pits, in order to solve the problem that existing foot protection plates cannot effectively balance vertical height changes and vertical stress strength, thereby improving the service life of the foot protection plate and enhancing economic benefits.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a high-strength elevator foot protection plate assembly for shallow pits, which is used to meet the vertical height changes of the foot protection plate while improving the vertical stress strength of the foot protection plate, so as to reduce the deformation of the foot protection plate, improve the strength of the foot protection plate, and improve the service life and economic benefits of the foot protection plate. Specifically, it includes an upper foot protector and a lower foot protector connected in sequence. Upper wing plates are provided on both sides of the upper foot protector, and lower wing plates are provided on both sides of the lower foot protector. A middle wing plate is provided between the upper and lower wing plates. The upper and lower ends of the middle wing plate abut against the upper and lower wing plates, respectively. A rotating assembly is provided on the upper foot protector, and the middle wing plate is rotatably positioned between the upper and lower foot protectors via the rotating assembly. A rotating shaft is provided on the middle wing plate, and an elastic assembly is provided on the rotating shaft, with one end of the elastic assembly located on the upper foot protector. A connecting rod assembly is provided on the rotating shaft, and the connecting rod assembly is connected to the lower foot protector and a bending guide wheel, with the bending guide wheel located on both sides of the lower foot protector.

[0007] Accordingly, the present invention also provides an application method for a high-strength elevator foot protection plate assembly for shallow pits, applied to the aforementioned high-strength elevator foot protection plate assembly for shallow pits. The method includes: when the elevator car is suspended, the upper and lower foot protection plates are locked by the middle wing plate, forming a vertically aligned state; when the elevator car descends, the bending guide wheel abuts against the guide rail assembly, and the middle wing plate, driven by the connecting rod assembly, rotates upward around the rotating assembly, releasing the lower foot protection plate from locking and bending the upper and lower foot protection plates; when the elevator car rises, the elastic component provides a restoring force, restoring the lower and upper foot protection plates to the locked aligned state.

[0008] The principles and advantages of this scheme are:

[0009] In existing foot protection board designs, in order to meet the application requirements of foot protection boards in shallow pits and to accommodate changes in the vertical height of the foot protection boards, most designs adopt a foldable structure. However, as those skilled in the art know, the connection points of the foldable structure become the weakest part of the entire structure because they are in a foldable state. Therefore, the foldable parts are reinforced and stabilized during the design process.

[0010] However, in practical applications, based on our numerous repairs and tests, we found that reinforcing only the central folding section still causes deformation of the foot guards. In fact, the excessive strength in the central section negatively impacts the deformation of the side foot guards, neglecting the strength adaptability of the side foot guards. Even if the side foot guards were to be reinforced to control deformation, given the existing flat folding structure, the only way to increase strength is by increasing the thickness of the side foot guards. This undoubtedly increases the weight of the foot guards, making the elevator car heavier, and also increases the production cost of the foot guards, further reducing their economic viability.

[0011] Taking all the above considerations into account, this application breaks away from the existing design concept of foot protector structures. Through the ingenious structural design of the upper, middle, and lower wing plates, a strong support structure is formed in which the upper and lower foot protectors abut against each other. The upper and lower wing plates provide strength support for the plane of the foot protector, and the middle wing plate, with its simple structure, achieves a relative locking state between the upper and lower foot protectors. Thus, a high-strength foot protector can be deployed and folded in a simple wing plate structure, while reducing the deformation caused by the foot protector itself. This effectively improves the strength of the foot protector, reduces its weight, enhances its practicality, extends its service life, and improves its economy. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention.

[0013] Figure 2 This is a schematic diagram of the upper foot protection plate structure according to Embodiment 1 of the present invention.

[0014] Figure 3 This is a schematic diagram of the upper wing plate structure according to Embodiment 1 of the present invention.

[0015] Figure 4 This is a schematic diagram of the lower foot protection plate structure according to Embodiment 1 of the present invention.

[0016] Figure 5 This is a schematic diagram of the lower wing plate structure according to Embodiment 1 of the present invention.

[0017] Figure 6 This is a schematic diagram of the middle wing plate structure in Embodiment 1 of the present invention.

[0018] Figure 7 This is a schematic diagram of the guide rail assembly structure according to Embodiment 1 of the present invention.

[0019] Figure 8 This is a schematic diagram of the unfolded structure of Embodiment 1 of the present invention.

[0020] Figure 9 for Figure 8 Schematic diagram of the cross-sectional structure of the middle guide rail assembly AA.

[0021] Figure 10 This is a schematic diagram of the folded structure of Embodiment 2 of the present invention. Detailed Implementation

[0022] The following detailed description illustrates the specific implementation method:

[0023] The reference numerals in the accompanying drawings include: upper foot guard 1, top mounting hole 101, upper wing plate 102, lower rounded corner 1021, lower foot guard 2, lower wing plate 201, bent portion 202, upper curved edge 2012, bent guide wheel mounting hole 2011, connecting rod movable groove 2021, hinge assembly 3, middle wing plate 4, rotating shaft mounting hole 402, upper rounded edge 403, rotating arm 401, and lower end... Arc edge 404, rotating shaft mounting hole 4011, bent guide wheel 5, guide rail assembly 6, guide rail groove 61, guide rail sealing plate 62, bent guide wheel limiting groove 611, sliding guide wheel limiting groove 612, rotating shaft mounting part 7, rotating shaft 8, elastic connecting part 9, elastic part 10, elastic part slider 11, rotating shaft 12, connecting rod slider 13, connecting rod 14, cross connecting slider 15, sliding guide wheel 16, bent guide wheel rotating shaft 17.

[0024] Example 1

[0025] As attached Figure 1 As shown in this embodiment, a high-strength elevator foot protection plate assembly for shallow pits simplifies the foot protection plate structure, while improving the foot protection plate strength, reducing the risk of deformation, and resolving the contradiction between vertical changes and insufficient vertical force strength of the foot protection plate, thereby increasing the service life of the foot protection plate and improving the economic benefits of its use.

[0026] Specifically, it includes an upper foot protector 1 and a lower foot protector 2 that are interconnected via a hinge assembly 3. (See attached image) Figure 2 As shown, a row of top mounting holes 101 are arranged side by side at the upper end of the upper foot guard plate 1. The upper foot guard plate 1 is installed on the bottom of the elevator car through the top mounting holes 101, which facilitates installation and replacement and is convenient to operate. (See attached diagram.) Figure 3 As shown, upper wing plates 102 are welded to both sides of the upper foot plate 1. The upper wing plates 102 are located in the middle of the upper foot plate 1, and the angle between the upper wing plates 102 and the surface of the upper foot plate 1 is α. In this embodiment, the angle α should be no less than 90° and no more than 102° to ensure that the vertical height of the lower foot plate 2 is small after bending, and that the surface of the lower foot plate 2 will not touch the surface of the guide rail assembly 6, thus ensuring the effective and stable operation of the foot plate.

[0027] For details, see attached. Figure 3 The upper wing plate 102 shown is generally a cuboid structure. In this embodiment, the widest part of the upper wing plate 102 has a width of 30-50 mm and a thickness of 0.5-1 mm. A lower arc corner 1021 is integrally formed on the lower part of the upper wing plate 102. The radius of the lower arc corner 1021 is r. In this embodiment, the radius of the lower arc corner 1021 is half the width of the upper wing plate 102 to ensure structural strength while reducing manufacturing difficulty.

[0028] As attached Figure 4 The lower foot protector 2 shown has a bending portion 202 at its lower end. The bending portion 202 includes an inclined plate with a 30° inclination to the surface of the lower foot protector 2, and a horizontal plate welded to the outside of the inclined plate, so that the horizontal plate is perpendicular to the surface of the lower foot protector 2. In this embodiment, the width of the horizontal plate is 50-60mm. U-shaped connecting rod movable grooves 2021 with outward-facing openings are respectively provided at both ends of the horizontal plate.

[0029] Lower wing plates 201 are welded to both sides of the lower foot plate 2. The lower end of the lower wing plate 201 is attached to the bent part 202 and aligned with the horizontal plate of the bent part 202. (See attached image) Figure 5 The lower wing plate 201 shown has an upper arc-shaped edge 2012 with a radius of R at its upper part. A bent guide wheel mounting hole 2011 is provided at the lower end of the lower wing plate 201. (See attached diagram.) Figure 1 As shown, a bending guide wheel shaft 17 is installed between the two lower wing plates 201 through bending guide wheel mounting holes 2011, with the bending guide wheel shaft 17 laterally positioned above the horizontal plate. Bending guide wheels 5 are installed on both sides of the bending guide wheel shaft 17, located on the outer sides of the two lower wing plates 201. In this embodiment, the width of the lower wing plate 201 is 30-50 mm, and the thickness is 0.5-1 mm to ensure support strength.

[0030] As attached Figure 1 As shown, a rotating assembly is also installed on the upper wing plate 102. In this embodiment, the rotating assembly includes a rotating shaft 8 and a rotating shaft mounting component 7. The rotating shaft 8 is horizontally mounted on the upper wing plate 102 via the rotating shaft mounting component 7. A middle wing plate 4 is installed between the upper wing plate 102 and the lower wing plate 201, in conjunction with the attached... Figure 6 As shown, the upper end of the middle wing plate 4 has a rotating shaft mounting hole 402. The middle wing plate 4 is mounted on both ends of the rotating shaft 8 through the rotating shaft mounting hole 402 and is respectively attached to the upper and lower wing plates, so that the middle wing plate 4 can rotate around the rotating shaft 8. The width of the middle wing plate 4 is 30-50mm and the thickness is 0.5-1mm to ensure support strength and fit.

[0031] For details, see attached. Figure 6 As shown, the upper end of the middle wing plate 4 has an upper arc edge 403 with a radius of r, which is concentric with the rotating shaft mounting hole 402, so that the upper end of the middle wing plate 4 matches and abuts against the lower arc angle 1021 of the lower end of the upper wing plate 102. The lower end of the middle wing plate 4 has a lower arc edge 404, the center of which is concentric with the upper arc edge 403, and the radius of the lower arc edge 404 is R. In this embodiment, since the width of the middle wing plate 4 is 50mm, the radius r is taken as 25mm, and R can be taken as 200mm.

[0032] A rotating arm 401 is integrally formed in the lower middle part of the middle wing plate 4, and the rotating arm 401 is 140mm long. A rotating shaft mounting hole 4011 is provided at the front end of the rotating arm 401. A rotating shaft 12 is installed between the rotating arms 401 through the rotating shaft mounting hole 4011. An elastic component and a connecting rod component are respectively installed on the rotating shaft 12.

[0033] For details, see attached. Figure 1 As shown, the elastic components include two sets, respectively installed at both ends of the rotating shaft 12 and located inside the hinge assembly 3. Each set of elastic components includes an elastic connector 9, an elastic element 10, and an elastic element slider 11. The elastic connector 9 is installed on the upper foot protector 1, the elastic element slider 11 is sleeved on the rotating shaft 12, and one end of the elastic element 10 is elastically connected to the elastic connector 9, while the other end is fixedly connected to the elastic element slider 11. In this embodiment, the elastic element 10 is a spring, which elastically connects the rotating shaft 12 and the upper foot protector 1 through the spring force, forming a tension force, and causing the middle wing plate 4 to be pulled back by the spring force.

[0034] Specifically, the linkage assembly comprises two sets, respectively installed at both ends of the rotating shaft 12 and located outside the elastic component. Each linkage assembly includes a linkage slider 13, a connecting rod 14, and a cross-connecting slider 15. The linkage slider 13 is sleeved on the rotating shaft 12, converting the linear motion of the linkage slider 13 into the axial motion of the rotating shaft 12, thereby driving the middle wing plate 4 to rotate upwards. The cross-connecting slider 15 is sleeved on the bent guide wheel shaft 17. The upper end of the connecting rod 14 is fixedly connected to the linkage slider 13, and the lower end of the connecting rod 14 is embedded in the cross-connecting slider 15 and passes through the linkage movable groove 2021 on the cross plate, connecting the lower end to the sliding guide wheel 16. The connecting rod 14 is fixedly connected to the bent guide wheel shaft 17 via the cross-connecting slider 15, thereby driving the connecting rod 14 to rotate. The sliding guide wheel 16 is located directly below the movable groove 2021 of the horizontal plate connecting rod and is lower than the position of the bent guide wheel 5, so that the sliding guide wheel 16 drives the connecting rod assembly to deflect, thereby driving the middle wing plate 4 to rotate.

[0035] Simultaneously, a guide rail assembly 6 is also installed below the lower foot guard plate 2. The guide rail assembly 6 includes two sets, which are respectively installed below the bending guide wheel 5. In this embodiment, as shown in the attached... Figure 7 As shown, each guide rail assembly 6 includes a guide rail groove 61 and guide rail sealing plates 62 disposed at both ends of the guide rail groove 61. (See attached diagram) Figure 8 and attached Figure 9As shown, the guide rail groove 61 is provided with a bending guide wheel limiting groove 611 and a sliding guide wheel limiting groove 612, so that when the bending guide wheel 5 descends, it can abut against the bending guide wheel limiting groove 611 and slide therein; at the same time, the sliding guide wheel 16 abuts against the sliding guide wheel limiting groove 612 and slides therein, thereby driving the lower foot guard plate 2 to rotate inward so that it bends against the upper foot guard plate 1. The sliding distance of the sliding guide wheel 16 can be limited by the guide rail sealing plate 62, thereby ensuring the bending height distance and ensuring operational stability.

[0036] In this embodiment, by improving the structure of the foot guard plate, a simple upper wing plate 102, middle wing plate 4, and lower wing plate 201 are used in conjunction to form a stable and secure locking state, thereby strengthening the support strength of the upper and lower foot guard plates. Simultaneously, a simple linkage rotation structure unlocks the middle wing plate 4, allowing the upper and lower foot guard plates to fold, effectively shortening the vertical distance of the foot guard plate. During use, the upper wing plate 102 and lower wing plate 201 effectively strengthen the support strength of the upper and lower foot guard plates, reducing deformation and improving overall strength. This also simplifies the foot guard plate structure, reduces its weight, improves its applicability to shallow pits, extends its service life, and enhances the safety of elevator operation.

[0037] Example 2

[0038] This embodiment also provides an application method for a high-strength elevator foot protection plate assembly for shallow pits, applied to a high-strength elevator foot protection plate assembly for shallow pits in Embodiment 1. It is mainly used in the installation and use of elevator cars in shallow pits, specifically in conjunction with the attached... Figure 1 Appendix Figure 8 As shown, when the elevator car is suspended, the upper foot guard 1 and the lower foot guard 2 are in the unfolded state, that is, in a vertically aligned state. At this time, the lower foot guard 2 and the upper foot guard 1 are locked together by the middle wing plate 4, so that the foot guards are locked in the unfolded state by the cooperation of the upper wing plate 102, the middle wing plate 4 and the lower wing plate 201, and cannot be bent, thereby strengthening the overall support strength of the foot guards and reducing the impact of deformation.

[0039] When the elevator car descends, as shown in the attached... Figure 10As shown, the bending guide wheel 5 contacts the guide rail assembly 6, causing the sliding guide wheel 16 to roll in the guide rail groove of the guide rail assembly toward the car. The linkage assembly drives the rotating arm 401 of the middle wing plate 4 to rotate counterclockwise around the rotation axis 8, thereby unlocking the upper wing plate 102 and the lower wing plate 201, and putting the lower foot guard 2 in the unlocked state. As the elevator car continues to descend, the sliding guide wheel 16 continues to roll, causing the lower foot guard 2 to bend toward the car, so that the lower foot guard 2 and the upper foot guard 1 form a folded state, thereby shortening the space occupied by the foot guard in the vertical direction, so as to realize the effective application of the foot guard in the shallow pit. At the same time, the upper wing plate 102 and the lower wing plate 201 strengthen the upper and lower foot guards, avoiding deformation during the folding process, and only applying force to the folded part.

[0040] When the elevator car rises, as the pressure on the foot guards decreases, the elastic element 10 provides a restoring force, causing the foot guards to return from a bent state to an unfolded state and be locked by the middle wing plate 4, thereby ensuring that the foot guards will not bend when subjected to lateral force and reducing the deformation of the foot guards.

[0041] In this embodiment, the lower foot protection plate is bent by the downward movement of the elevator car and reset by the upward movement of the elevator car. The foot protection plate structure is locked by the cooperation of the upper and lower wing plates and the middle wing plate 4, thereby effectively improving the strength of the foot protection plate during operation. At the same time, the upper and lower wing plates can further improve the strength of the foot protection plate, so as to reduce the deformation of the foot protection plate under stress and improve the strength of the foot protection plate.

[0042] Meanwhile, through multiple tests and studies, this solution simplifies the foot guard structure while achieving folding and extension of the foot guard through a simple linkage mechanism. A simple middle wing plate provides a high-strength locking mechanism, effectively improving the foot guard's strength, rather than being limited to increasing the thickness of the foot guard in existing structures. This solution significantly optimizes the foot guard structure, reduces production costs, and is simple to install, improving the safety and stability of elevator operation.

[0043] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A high-strength elevator foot protection plate assembly for shallow pits, characterized in that: The device includes an upper foot protector and a lower foot protector connected in sequence. Upper wing plates are provided on both sides of the upper foot protector, and lower wing plates are provided on both sides of the lower foot protector. A middle wing plate is provided between the upper and lower wing plates. The upper and lower ends of the middle wing plate abut against the upper and lower wing plates, respectively. A rotating assembly is provided on the upper foot protector, comprising a rotating shaft and a rotating shaft mounting component. The rotating shaft is laterally mounted on the upper wing plate via the rotating shaft mounting component. The middle wing plate is rotatably positioned between the upper and lower foot protection plates via a rotating assembly. A rotating shaft mounting hole is provided at the upper end of the middle wing plate, through which the middle wing plate is mounted on both ends of a rotating shaft and respectively fitted to the upper and lower wing plates. A rotating arm is integrally formed in the lower middle part of the middle wing plate, with a rotating shaft mounting hole at the front end of the rotating arm. A rotating shaft is mounted between the rotating arms through the rotating shaft mounting hole. An elastic component is provided on the rotating shaft, with one end of the elastic component mounted on the upper foot protection plate. The elastic component comprises two sets, respectively mounted on both ends of the rotating shaft. Each set of elastic components includes an elastic connector, an elastic element, and an elastic element slider. The elastic connector is mounted on the upper foot protection plate, and the elastic element slider is sleeved on the rotating shaft. One end of the elastic element is elastically connected to the elastic connector, and the other end is fixedly connected to the elastic element slider. A connecting rod assembly is provided on the rotating shaft. The connecting rod assembly is connected to the lower foot guard plate and the bending guide wheel respectively. The connecting rod assembly includes two sets, which are respectively installed at both ends of the rotating shaft. Each set of connecting rod assembly includes a connecting rod slider, a connecting rod, and a cross connecting slider. The connecting rod slider is sleeved on the rotating shaft, and the cross connecting slider is sleeved on the rotating shaft of the bending guide wheel. The upper end of the connecting rod is fixedly connected to the connecting rod slider, and the lower end of the connecting rod is embedded in the cross connecting slider. A bending guide wheel mounting hole is provided at the lower end of the lower wing plate. A bending guide wheel shaft is installed between the two lower wing plates through the bending guide wheel mounting hole. Bending guide wheels are installed on both sides of the bending guide wheel shaft, and the bending guide wheels are located on the outer sides of the two lower wing plates respectively.

2. The high-strength elevator foot protection plate assembly for shallow pits according to claim 1, characterized in that: The upper wing plate is located at the middle of the side of the upper foot protection plate and is set at an angle α with the surface of the upper foot protection plate, where 90°<α<102°; the lower part of the upper wing plate has a lower arc angle with a radius of r, and r is half the width of the upper wing plate.

3. A high-strength elevator foot protection plate assembly for shallow pits according to claim 2, characterized in that: The lower wing plate is located at the bottom of the side of the lower foot guard plate, and has an upper arc-shaped edge at the top of the lower wing plate, the radius of which is R.

4. A high-strength elevator foot protection plate assembly for shallow pits according to claim 3, characterized in that: The upper end of the middle wing plate has an upper arc edge with a radius of r, which fits and abuts against the lower arc angle of the upper wing plate; the lower end of the middle wing plate has a lower arc edge, which is concentric with the upper arc edge with a radius of R, and fits and abuts against the upper arc edge of the lower wing plate.

5. A high-strength elevator foot protection plate assembly for shallow pits according to claim 1, characterized in that: The lower end of the lower foot guard plate is provided with a bent part, and the lower end of the connecting rod assembly is connected to the bent part; a sliding guide wheel is also provided at the lower end of the connecting rod assembly.

6. A high-strength elevator foot protection plate assembly for shallow pits according to claim 5, characterized in that: It also includes a guide rail assembly, which is located at the lower end of the lower foot guard plate and contacts the bending guide wheel and the sliding guide wheel respectively.

7. A method for applying a high-strength elevator foot protection plate assembly for shallow pits, characterized in that, The high-strength elevator foot protection plate assembly applied to any one of claims 1-6 includes: when the elevator car is suspended, the upper foot protection plate and the lower foot protection plate are locked by the middle wing plate to form a vertically aligned state; when the elevator car descends, the bending guide wheel abuts against the guide rail assembly, and the middle wing plate flips upward around the rotating assembly under the drive of the connecting rod assembly, thereby releasing the lower foot protection plate from locking and bending the upper and lower foot protection plates; when the elevator car rises, the elastic component provides a restoring force to restore the lower and upper foot protection plates to the locked aligned state.

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