Silencing device for an elevator contactor

Abstract

The utility model discloses an elevator contactor's mute device, and belongs to the field of elevator equipment, which discloses a mute device of elevator contactor. In the utility model, the inner side of the upper cover assembly and the inner side of the base assembly are both provided with soundproof fireproof cotton, the soundproof fireproof cotton extends outward along the butt joint edge of the upper cover assembly and the base assembly and mutually adheres, forming an inlet and outlet wire port for wrapping wire harness. The base assembly comprises a control cabinet bottom plate assembly, a damping spring, a contactor mounting bottom plate and a pan head screw, the control cabinet bottom plate assembly comprises a press-in stud; wherein the contactor mounting bottom plate is supported on the control cabinet bottom plate assembly by the damping spring, the lower end of the damping spring directly contacts the soundproof fireproof cotton on the inner side of the base assembly, and the pan head screw passes through the contactor mounting bottom plate and the damping spring in sequence and is fixed to the press-in stud. Finally, the soundproof fireproof cotton forms a mute cavity, which absorbs middle and high frequency noise; and the damping spring design eliminates low frequency noise.

Description

Technical Field

[0001] This utility model relates to the field of elevator equipment, and in particular to a silent device for elevator contactors. Background Technology

[0002] With the increasing demand for elevator installation in older residential communities, the demand for elevators, especially machine-room-less passenger elevators, is also rising year by year. Since there is no space in the machine room to install the control cabinet, the control cabinet of a machine-room-less passenger elevator is usually installed on the shaft wall on the side of the elevator lobby door.

[0003] When an elevator starts or stops, the contactors inside the control cabinet generate mechanical impact and resonance noise. This noise propagates outwards through the air and the floor, affecting the quiet resting environment of residents. Therefore, there is an urgent need for a noise reduction solution for the elevator control cabinet contactors. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a noise reduction device for elevator contactors, thereby enabling a noise reduction solution for elevator control cabinet contactors.

[0005] To solve the above-mentioned technical problems, the present invention provides a silent device for an elevator contactor, including an upper cover assembly and a base assembly connected to each other. Sound-insulating and fire-resistant cotton is provided on the inner side of both the upper cover assembly and the base assembly. The sound-insulating and fire-resistant cotton extends outward along the mating edges of the upper cover assembly and the base assembly and fits together to form an inlet / outlet for wrapping the wiring harness. The base assembly includes a control cabinet base plate assembly, a shock-absorbing spring, a contactor mounting base plate, and pan head screws. The control cabinet base plate assembly includes press-fit studs. The contactor mounting base plate is supported on the control cabinet base plate assembly by the shock-absorbing spring. The lower end of the shock-absorbing spring is in direct contact with the sound-insulating and fire-resistant cotton on the inner side of the base assembly. The pan head screws pass through the contactor mounting base plate and the shock-absorbing spring in sequence and are fixed to the press-fit studs.

[0006] In this embodiment, the inner walls of the top cover assembly and the base assembly are first lined with sound-insulating and fire-resistant cotton. When the two assemblies are fastened together, the contactor is completely enclosed in a sealed, silent cavity. The porous fiber structure of the sound-insulating cotton absorbs noise within the cavity, while the sealed cavity cuts off the propagation path of airborne sound, effectively absorbing mid-to-high frequency noise, thus forming the first soundproof barrier. The sound-insulating cotton extends outward along the mating edges and presses against each other, forming an elastic cable entry / exit port, allowing the cable harness to pass through without additional openings in the cabinet, maintaining the integrity of the cavity and preventing damage to the cable harness from bending or cutting. Furthermore, the contactor mounting base plate is supported on the control cabinet base plate by a shock-absorbing spring, with the lower end of the spring contacting the sound-insulating cotton. The instantaneous impact generated by the contactor's operation is converted into elastic deformation by the spring and further dissipated by the sound-insulating cotton, preventing low-frequency noise / vibration from being directly transmitted to the cabinet, forming the second vibration-damping barrier. The two barriers work together to significantly suppress mid-to-high frequency and low-frequency noise from the contactor.

[0007] In addition, the pan head screw passes through the contactor mounting base plate and the damping spring in sequence and is fixed to the press-fit stud. This detachable design reduces maintenance costs, and the damping spring can be quickly replaced simply by loosening the pan head screw during maintenance. Attached Figure Description

[0008] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0009] Figure 1 This is a schematic diagram of the overall structure of the silent device for the elevator contactor of this utility model;

[0010] Figure 2 This is an exploded view of the silent device of the elevator contactor of this utility model.

[0011] Figure 3 This is a schematic diagram of the base structure of the silent device for the elevator contactor of this utility model;

[0012] Figure 4 This is a schematic diagram of the inverted top cover structure of the silent device for the elevator contactor of this utility model;

[0013] Figure 5 This is a schematic diagram of the silent device of the elevator contactor in use.

[0014] The numbers in the diagram are explained as follows: 1. Silencing device; 2. Top cover assembly; 21. Top cover body; 22. Top cover side panel; 23. Blind rivet; 3. Sound insulation and fireproof cotton; 4. Cable inlet / outlet; 5. Base assembly; 51. Control cabinet base plate assembly; 511. Control cabinet base plate; 512. Press-fit stud; 513. Rivet nut; 52. Shock-absorbing spring; 53. Contactor mounting base plate; 54. Pan head screw; 6. Fastener; 7. Rail; 8. Elevator contactor. Detailed Implementation

[0015] With the deepening of urban renewal and age-friendly renovation, a large number of existing multi-story residential buildings are starting to install elevators to meet the travel needs of the elderly and people with mobility difficulties. Among them, the compact and flexible machine-room-less passenger elevator has become the mainstream choice for retrofit projects because it does not require a dedicated machine room, has a short installation period, and has low requirements for building load.

[0016] In machine-room-less passenger elevator solutions, the elevator control cabinet is typically fixed to the shaft wall next to the elevator lobby door—its front faces the public corridor, while its back is directly exposed inside the shaft. Compared to traditional machine room layouts, this close-proximity installation location makes it easier for noise generated by the operation of electrical components to penetrate the walls or enter the resident's space through cavity resonance, especially at night when the ambient noise level is low, significantly impacting static areas such as bedrooms and living rooms.

[0017] In machine-room-less passenger elevators, the control circuit needs frequent switching during startup, braking, or inter-floor operation. Furthermore, the engagement / disengagement of contactor armatures within the control cabinet generates momentary mechanical shocks and electromagnetic vibrations. This noise propagates through two main paths:

[0018] 1. Airborne transmission: The impact sound of the armature radiates into the waiting hall through gaps in cabinet doors, wire holes, and other openings.

[0019] 2. Structural vibration: Impact vibration is transmitted along the contactor mounting plate to the control cabinet base plate, and then to the floor / shaft wall, thus being transmitted to the rest area.

[0020] Currently, most silent contactors used in the elevator industry employ special brackets or silent boxes to achieve noise reduction.

[0021] 1. Custom-made supports: For example, adding a custom-made support to the outside of a regular contactor and connecting multiple sets of damping springs in series can reduce impact noise. However, this method increases the overall size and is incompatible with existing mounting interfaces. Furthermore, the manufacturing process of these custom-made supports and springs is complex and involves various materials, resulting in manufacturing costs and market prices far exceeding those of standard contactors. The irregular dimensions also limit the versatility of replacements during later maintenance.

[0022] 2. Soundproof Box: Another approach is to add a "base + top cover" soundproof box to the standard contactor, using a combination of rubber damping sleeves and sound-absorbing cotton to reduce noise. Although the cost is lower than that of special supports, the rubber sleeves will age / harden / collapse over time, and their vibration isolation performance will significantly decrease; at the same time, there is still a rigid connection between the box and the control cabinet base plate, and the effect of suppressing low-frequency structural noise is limited.

[0023] In summary, existing noise reduction methods are either too costly and inconvenient to maintain, or their noise reduction effect diminishes over time. Especially in the scenario of adding elevators to older residential communities, residents are highly sensitive to noise and have limited budgets, making a noise reduction solution for elevator control cabinet contactors urgently needed.

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to help readers better understand this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various changes and modifications based on the following embodiments. The division of the various embodiments below is for the convenience of description and should not constitute any limitation on the specific implementation of this utility model. The various embodiments can be combined with and referenced by each other without contradiction.

[0025] One embodiment of this utility model relates to a noise reduction device for an elevator contactor, which can be applied in an elevator cabinet. The device includes an interconnected upper cover assembly and a base assembly. Sound-insulating and fire-resistant cotton is provided on the inner side of both the upper cover assembly and the inner side of the base assembly. The sound-insulating and fire-resistant cotton extends outward along the mating edges of the upper cover assembly and the base assembly and adheres to each other, forming an inlet / outlet for wrapping the wiring harness. The base assembly includes a control cabinet base plate assembly, a shock-absorbing spring, a contactor mounting base plate, and pan head screws. The control cabinet base plate assembly includes press-fit studs. The contactor mounting base plate is supported on the control cabinet base plate assembly by the shock-absorbing spring. The lower end of the shock-absorbing spring is in direct contact with the sound-insulating and fire-resistant cotton on the inner side of the base assembly. The pan head screws pass through the contactor mounting base plate and the shock-absorbing spring in sequence and are fixed to the press-fit studs. In this embodiment, the inner walls of the upper cover assembly and the base assembly are first provided with sound-insulating and fire-resistant cotton. When the two components are fastened together, the contactor is completely enclosed in a sealed, noise-reducing cavity. The porous fiber structure of the sound-absorbing cotton absorbs noise within the cavity, while the enclosed cavity cuts off the propagation path of airborne sound, effectively absorbing mid-to-high frequency noise, thus forming the first soundproof barrier. The sound-absorbing cotton extends outward along the mating edges and presses against each other, forming an elastic cable entry / exit port. This allows the cable harness to pass through without requiring additional holes in the cabinet, maintaining the integrity of the cavity and preventing damage to the cable harness from bending or cutting. Furthermore, the contactor mounting base plate is supported on the control cabinet base plate by damping springs, with the lower end of the springs contacting the sound-absorbing cotton. The instantaneous impact generated by the contactor's operation is converted into elastic deformation by the springs and further dissipated by the sound-absorbing cotton, preventing low-frequency noise / vibration from being directly transmitted to the cabinet, forming the second vibration damping barrier. The two barriers work together to significantly suppress mid-to-high frequency and low-frequency noise from the contactor. In addition, pan head screws pass through the contactor mounting base plate and damping springs sequentially and are fixed to the press-fit studs. This detachable design reduces maintenance costs; during maintenance, the damping springs can be quickly replaced simply by loosening the pan head screws.

[0026] The following will be based on Figures 1 to 5 The following is a detailed description of the implementation details of the silent device of the elevator contactor in an embodiment of the present invention. The following implementation details are provided for ease of understanding only and are not necessary for implementing this solution.

[0027] like Figure 1 As shown, the elevator contactor's noise reduction device 1 in this embodiment includes an upper cover assembly 2 and a base assembly 5 connected to each other. Sound-insulating and fire-resistant cotton 3 is provided on the inner side of the upper cover assembly 2 and the inner side of the base assembly 5. The sound-insulating and fire-resistant cotton 3 extends outward along the mating edge of the upper cover assembly 2 and the base assembly 5 and fits together to form an inlet and outlet port 4 for wrapping the wire harness.

[0028] Specifically, when the two components are engaged, the elevator contactor 8 is completely enclosed in a sealed, silent cavity. The porous fiber structure of the sound insulation cotton can absorb noise within the cavity, while the sealed cavity cuts off the propagation path of airborne sound, effectively absorbing mid-to-high frequency noise, thus forming the first soundproof barrier.

[0029] In addition, during the assembly of the wiring harness, the upper cover assembly 2 and the base assembly 5 press against each other to form an "Ω"-shaped elastic inlet / outlet port 4. The wiring harness of the elevator contactor 8 can be directly inserted into this elastic clamping gap and covered by the cotton body, without the need to open a hole in the control cabinet, thus keeping the silent cavity completely sealed. At the same time, the outer cotton layer forms a flexible sheath for the wiring harness, avoiding damage or cuts caused by long-term vibration.

[0030] like Figure 2 As shown, the base assembly 5 includes a control cabinet base plate assembly 51, a shock-absorbing spring 52, a contactor mounting base plate 53, and pan head screws 54. The control cabinet base plate assembly 51 includes press-fit studs 512; wherein, as shown... Figure 3 As shown, the contactor mounting base plate 53 is supported on the control cabinet base plate assembly 51 by the shock-absorbing spring 52. The lower end of the shock-absorbing spring 52 is in direct contact with the sound-insulating and fireproof cotton 3 inside the base assembly 5. The pan head screw 54 passes through the contactor mounting base plate 53 and the shock-absorbing spring 52 in sequence and is fixed to the press-fit stud 512.

[0031] Specifically, the damping spring 52 softens the mechanical impact of the elevator contactor 8 during operation, effectively reducing the amplitude of low-frequency vibrations. Furthermore, the sound-insulating and fire-resistant cotton 3 is directly attached to the lower end of the spring, utilizing its porous structure to absorb residual sound wave energy, cutting off the airborne sound propagation path, and enhancing the noise reduction effect of the first layer of soundproofing barrier constructed based on the upper cover assembly 2 and the base assembly 5. Finally, the tight fit between the pan head screw 54 and the press-fit stud 512 ensures the overall sealing of the assembly, preventing low-frequency noise leakage caused by vibration gaps.

[0032] In addition, the pan head screw 54 passes through the contactor mounting base plate 53 and the shock absorber spring 52 in sequence and is fixed to the press-fit stud 512. This detachable design reduces maintenance costs. During maintenance, the shock absorber spring 52 can be quickly replaced simply by loosening the pan head screw 54.

[0033] like Figure 4 As shown, the upper cover assembly 2 includes an upper cover body 21, an upper cover side plate 22, and a pop rivet 23. The upper cover body 21 and the upper cover side plate 22 are connected by the pop rivet 23. The pop rivet 23 connects the upper cover body 21 and the side plate to form a rigid whole, eliminating the need for additional bolts, simplifying assembly, and effectively reducing disassembly costs.

[0034] Furthermore, such as Figure 4As shown, the upper cover body 21 has mounting lugs on both sides for fixing the upper cover assembly 2 to the base assembly 5. The mounting lugs are integrally stamped with the upper cover body 21, and the bent parts are stress-annealed to ensure that the structural integrity is maintained even after long-term use.

[0035] Furthermore, the side with the folding lug has a round hole, and the other side has an oblong hole to facilitate the installation of the top cover assembly 2. The combination of the round hole and the oblong hole allows the top cover to be "hung up first and then snapped on," eliminating the need for multiple screws to complete alignment and locking, effectively reducing disassembly difficulty and cost.

[0036] Furthermore, the sound-insulating and fire-resistant cotton 3 includes an aluminum foil layer. This aluminum foil layer forms a continuous metal barrier that reflects heat and prevents the spread of flames. When the elevator contactor 8 actuates and generates an arc, the high-temperature sparks are instantly isolated by the aluminum foil layer, preventing them from burning the sound-insulating cotton itself and reducing the risk of fire.

[0037] Furthermore, the fireproof and soundproof insulation cotton is at least 5mm thick to facilitate cable entry and exit. The cotton thickness ensures a buffer layer of at least 5mm is formed around the wiring holes to prevent cable abrasion.

[0038] Furthermore, the sound-insulating and fire-resistant cotton 3 is attached to the inside of the upper cover assembly 2 and the base assembly 5 using an adhesive method. This adhesive method simplifies the installation process and ensures complete coverage.

[0039] like Figure 3 As shown, the base assembly 5 comprises a control cabinet base plate assembly 51, a shock-absorbing spring 52, a contactor mounting base plate 53, and pan head screws 54; the control cabinet base plate assembly 51 includes a control cabinet base plate 511, a press-fit stud 512, and a rivet nut 513.

[0040] Furthermore, such as Figure 3 As shown, the control cabinet base plate assembly 51 is provided with a press-fit stud 512 and a pull nut 513 on the control cabinet base plate 511. The pull nut 513 is used for the installation of the upper cover assembly 2, and the press-fit stud 512 is used for the installation of the contactor mounting base plate 53.

[0041] Furthermore, when the pan head screw 54 is tightened, the damping spring 52 is used to provide preload. Specifically, after the pan head screw 54 is tightened, the damping spring 52 is compressed to a certain size, forming a preload. The preload keeps the contactor mounting base plate 53 firmly "floating" above the spring, ensuring that the base plate is always in the middle of the spring's working range, thus preventing spring failure under light load or no load conditions.

[0042] Furthermore, such as Figure 5As shown, the contactor mounting base plate 53 has mounting holes for the rail 7 and elevator contactor 8. The mounting holes for the rail 7 are used to fix the rail 7, and the rail 7 is used for sliding installation of the elevator contactor 8. The mounting holes for the elevator contactor 8 are used to fix the elevator contactor 8 with screws. When the elevator contactor 8 cannot be installed via the rail 7, it can be directly fixed to the mounting base plate with screws. The mounting hole specifications for the rail 7 are compatible with mainstream DIN rails and accessories on the market, and the sliding rail installation only requires three steps: "click-slide-lock," to complete the elevator contactor positioning, ensuring universal installation adaptability and quick installation and maintenance. Furthermore, the screw fixing method can accommodate emergency or non-standard elevator contactor scenarios, avoiding secondary drilling and improving installation adaptability.

[0043] In an optional embodiment, the sound-insulating and fire-resistant cotton 3 is provided with a limiting hole for fitting onto the outside of the press-fit stud 512. The sound-insulating and fire-resistant cotton 3 adhered to the base assembly 5 has a limiting hole. During adhesion, it is limited by fitting onto the press-fit stud 512 on the control cabinet base plate assembly 51. The limiting hole is slightly larger than the outer diameter of the press-fit stud 512, ensuring that the lower end of the shock-absorbing spring 52 contacts the sound-insulating and fire-resistant cotton 3, rather than the control cabinet base plate 511, further mitigating the vibration generated when the elevator contactor 8 operates, suppressing noise propagation, and improving the quietness effect. Furthermore, the limiting hole, in conjunction with the press-fit stud 512, allows the sound-insulating cotton to automatically align during adhesion without additional alignment assistance.

[0044] In an optional embodiment, the damping spring 52 can also be a composite irregular spring, with an outer layer of alloy steel helical spring and an inner silicone pillar. This double-layer design allows for low-frequency vibration absorption through the large stroke characteristics of the outer alloy steel helical spring, while the inner silicone pillar absorbs high-frequency sound wave vibrations, thus comprehensively improving the bandwidth of vibration isolation.

[0045] In an optional embodiment, the sound-insulating and fire-resistant cotton 3 can also be designed as a three-layer composite structure, namely an aluminum foil layer, a high-density flame-retardant rock wool, and microporous polyester cotton. The aluminum foil layer reflects high-frequency sound waves, the rock wool layer absorbs mid-frequency energy, and the polyester cotton consumes the remaining low frequencies, further enhancing the sound absorption effect of the soundproof cavity.

[0046] In an optional embodiment, the sound-insulating and fire-resistant cotton 3 can also be designed to be installed on the top cover assembly 2 and the bottom plate assembly by means of snap-fit, so as to facilitate later replacement and maintenance.

[0047] In an optional embodiment, the surfaces of the top cover assembly 2 and the base assembly 5 can be designed as honeycomb-shaped vibration damping partitions. The honeycomb partitions can improve the energy dissipation of sound waves through multiple reflections, dissipate the sound waves and reflect them onto the sound insulation and fireproof cotton 3, thereby enhancing the noise reduction functionality of the sound insulation and fireproof cotton 3 and further enhancing the sound insulation and noise reduction effect.

[0048] The working principle that can be achieved based on the above embodiments is as follows: Figure 5 As shown, the elevator contactor 8 is mounted on the guide rail 7, which can move along the guide rail. The wiring harness can pass through the inlet / outlet port 4, and the sound-insulating and fire-resistant cotton 3 is used to elastically clamp the wiring harness, forming an elastic seal. The contactor mounting base plate 53 is supported by the shock-absorbing spring 52 and fixed by the pan head screw 54, which provides pre-tightening force. After the upper cover assembly 2 is tightened, a silent structure is formed. The inner sides of the upper cover assembly 2 and the base assembly 5 of this silent structure are covered with sound-insulating and fire-resistant cotton 3 with aluminum foil. After being fastened together, they form a closed space. The sound-insulating and fire-resistant cotton 3 plays a role in blocking noise, forming a soundproof chamber. The shock-absorbing spring 52 supports the contactor mounting base plate 53 and provides pre-tightening force, so that the vibration generated by the elevator contactor 8 at the moment of engagement and release is absorbed by the shock-absorbing spring 52, which plays a great role in buffering and vibration reduction. In this way, the noise generated when the elevator contactor 8 is activated is first buffered and weakened by the shock-absorbing spring 52, and then some of the noise is absorbed by the sound-insulating cotton, thereby greatly reducing the noise emitted outside the control cabinet. Tested in a darkroom using a decibel meter, the noise level produced is virtually identical to that of a traditional silent elevator contactor, indicating extremely low noise levels. Therefore, this structure significantly reduces the transmission of noise generated during elevator contactor operation. It is compact, simple in structure, easy to assemble, cost-effective, and fire-resistant and heat-insulating, making it suitable for installation in all elevator control cabinets. This structure is compatible with the installation of most contactors on the market, whether screw-mounted or standard rail-mounted, offering exceptional versatility. It not only solves the problems of low cost-effectiveness and poor compatibility of silent contactors but also addresses the insufficient vibration damping effect and aging issues of independent silent boxes.

[0049] In this embodiment, the inner walls of the top cover assembly and the base assembly are first lined with sound-insulating and fire-resistant cotton. When the two assemblies are fastened together, the contactor is completely enclosed in a sealed, silent cavity. The porous fiber structure of the sound-insulating cotton absorbs noise within the cavity, while the sealed cavity cuts off the propagation path of airborne sound, effectively absorbing mid-to-high frequency noise, thus forming the first soundproof barrier. The sound-insulating cotton extends outward along the mating edges and presses against each other, forming an elastic cable entry / exit port, allowing the cable harness to pass through without additional openings in the cabinet, maintaining the integrity of the cavity and preventing damage to the cable harness from bending or cutting. Furthermore, the contactor mounting base plate is supported on the control cabinet base plate by a shock-absorbing spring, with the lower end of the spring contacting the sound-insulating cotton. The instantaneous impact generated by the contactor's operation is converted into elastic deformation by the spring and further dissipated by the sound-insulating cotton, preventing low-frequency noise / vibration from being directly transmitted to the cabinet, forming the second vibration-damping barrier. The two barriers work together to significantly suppress mid-to-high frequency and low-frequency noise from the contactor. In addition, the pan head screw passes through the contactor mounting base plate and the damping spring in sequence and is fixed to the press-fit stud. This detachable design reduces maintenance costs, and the damping spring can be quickly replaced simply by loosening the pan head screw during maintenance.

[0050] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0051] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. In addition, the character " / " in this document generally indicates that the related objects before and after it have an "or" relationship.

[0052] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0053] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0054] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances. Furthermore, the examples mentioned in the above embodiments can be freely combined, and any combination can be understood as an embodiment. The terms "embodiment" or "example" appearing in various locations in the specification do not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Those skilled in the art will understand that the embodiments described herein can be combined with other embodiments.

[0055] Those skilled in the art will understand that the above embodiments are specific embodiments for implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A noise reduction device for an elevator contactor, comprising an upper cover assembly and a base assembly connected to each other, characterized in that, The inner side of the upper cover assembly and the inner side of the base assembly are both provided with sound-insulating and fire-resistant cotton. The sound-insulating and fire-resistant cotton extends outward along the mating edge of the upper cover assembly and the base assembly and fits together to form an inlet and outlet for wrapping the wire harness. The base assembly includes a control cabinet base plate assembly, a shock-absorbing spring, a contactor mounting base plate, and pan head screws. The control cabinet base plate assembly includes press-fit studs. The contactor mounting base plate is supported on the control cabinet base plate assembly by the shock-absorbing spring. The lower end of the shock-absorbing spring is in direct contact with the sound-insulating and fire-resistant cotton inside the base assembly. The pan head screws pass through the contactor mounting base plate and the shock-absorbing spring in sequence and are fixed to the press-fit studs.

2. The silent device for the elevator contactor according to claim 1, characterized in that, The sound-insulating and fireproof cotton is provided with a limiting hole, which is used to be fitted onto the outside of the press-fit stud.

3. The silent device for the elevator contactor according to claim 1, characterized in that, When the pan head screw is tightened, the damping spring is used to provide preload.

4. The silent device for the elevator contactor according to claim 1, characterized in that, The contactor mounting base plate is provided with standard rail mounting holes and contactor mounting holes. The standard rail mounting holes are used to fix the rail, the rail is used to slide the elevator contactor, and the contactor mounting holes are used to fix the elevator contactor with screws.

5. The silent device for the elevator contactor according to claim 1, characterized in that, The sound-insulating and fire-resistant cotton includes an aluminum foil layer.

6. The silent device for the elevator contactor according to claim 1, characterized in that, The upper cover assembly includes an upper cover body, an upper cover side plate, and a pull rivet. The upper cover body and the upper cover side plate are connected by the pull rivet.

7. The silent device for the elevator contactor according to claim 6, characterized in that, The upper cover body has mounting tabs on both sides for fixing the upper cover assembly to the base assembly.

8. The silent device for the elevator contactor according to claim 7, characterized in that, One side of the mounting lug has a round hole, and the other side of the mounting lug has a waist-shaped hole.

9. The silent device for the elevator contactor according to claim 1, characterized in that, The sound-insulating and fire-resistant cotton is attached to the inside of the upper cover assembly and the inside of the base assembly by means of adhesive.

10. The noise reduction device for the elevator contactor according to claim 1, characterized in that, The thickness of the sound-insulating and fire-resistant cotton shall not be less than 5mm.

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