A quick maintenance type key drop plate mechanism and a maintenance method thereof

Abstract

The application discloses a rapid maintenance type keyboard falling plate mechanism, which comprises a frame body, a plurality of keyboard conveying assemblies, a driving assembly and a supporting beam. The plurality of keyboard conveying assemblies are arranged along the length direction of the frame body, and one end of each of the keyboard conveying assemblies is rotatably installed on the frame body. The supporting beam is arranged below the other end of each of the keyboard conveying assemblies and can be longitudinally adjusted. The driving assembly is used for driving each of the keyboard conveying assemblies to swing. The driving assembly comprises a guide rail beam, a sliding cross beam, a plurality of cam mechanisms and connecting pieces. The guide rail beam is arranged along the length direction of the frame body and is fixed on the ground below the keyboard conveying assemblies. The driving assembly is designed in a slidable installation form, so that the rapid disassembly and maintenance of the driving assembly are realized. When the driving assembly is maintained, the whole keyboard falling plate does not need to be stopped, the downtime of the production line is reduced, and the economic loss is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of glass processing, and in particular to a quick-access piano key drop mechanism and its maintenance method. Background Technology

[0002] In the cold-end stage of a flat glass production line, the piano-key drop plate is a key piece of equipment, responsible for separating qualified and unqualified glass sheets. Qualified glass sheets are conveyed normally to the next stage, while unqualified glass sheets are dropped onto the drop plate and transported to the crusher for crushing and recycling. The piano-key drop plate consists of multiple piano-key arms, each equipped with an independent drive control mechanism, allowing for the combination of any number of arms to meet the crushing requirements of glass sheets of different sizes.

[0003] However, the piano key drop plate presents numerous problems. Firstly, the swing arms of the piano key drop plate move extremely frequently and require a large number of drive mechanisms. If the swing mechanism of even one key arm malfunctions, the entire piano key drop plate must be shut down for maintenance. This would cause the production line to cease normal operation, resulting in significant economic losses. Secondly, the maintenance process is fraught with difficulties. During maintenance, personnel must enter directly beneath the key swing arms; this area has limited space and poses a significant safety hazard. Summary of the Invention

[0004] In view of the aforementioned problems with existing piano key drop mechanisms, this paper aims to provide a quick-maintenance piano key drop mechanism and its maintenance method.

[0005] The specific technical solution is as follows: A quick-access piano key drop mechanism includes: a frame, a plurality of piano key conveying assemblies, a drive assembly, and a support beam. The plurality of piano key conveying assemblies are arranged along the length of the frame, and one end of each of the plurality of piano key conveying assemblies is rotatably mounted on the frame. The support beam is located below the other end of each of the plurality of piano key conveying assemblies and can be adjusted longitudinally. The drive assembly is used to drive each of the plurality of piano key conveying assemblies to swing. The driving component includes: A guide beam is provided along the length of the frame and fixed to the ground below several of the piano key conveying assemblies; A sliding crossbeam, which can be slidably mounted on the guide beam along the length of the guide beam; A plurality of cam mechanisms are mounted on the sliding crossbeam. The plurality of cam mechanisms are used to drive a plurality of piano key conveying assemblies to swing. Each cam mechanism includes a rotatable cam. The plurality of cams are supported on the bottom of the plurality of piano key conveying assemblies. By rotating the cams, the piano key conveying assemblies are driven to swing. A connector, detachably connected between the guide beam and the sliding crossbeam, for connecting the guide beam and the sliding crossbeam.

[0006] As a further improvement and optimization of this solution, the top of the guide beam has two guide rails, which are arranged in parallel and each guide rail is arranged along the length direction of the guide beam. The sliding beam is provided with two sets of sliding components, which are located at both ends of the sliding beam. Each sliding component includes two roller bearings and two guide rollers rotatably mounted on the sliding beam. The two roller bearings are in rolling engagement with the top of the two guide rails, and the two guide rollers are in rolling engagement with the mutually distant sides of the two guide rails.

[0007] As a further improvement and optimization of this solution, adjustable casters are provided at all four corners of the sliding crossbeam, and the height of the adjustable casters can be adjusted.

[0008] As a further improvement and optimization of this solution, the sliding component also includes two eccentric shafts, which are rotatably mounted on the sliding beam. Both roller bearings are eccentrically sleeved outside the two eccentric shafts. The height difference created by rotating the eccentric shafts causes the roller bearings to rotate eccentrically, allowing the roller bearings to contact or disengage from the top end face of the guide rail, and from the top of the sliding beam to the top of the guide rail beam. When the roller bearings contact the top end face of the guide rail, the sliding beam rises upwards and disengages from the top of the guide rail beam. When the roller bearings disengage from the top end face of the guide rail, the sliding beam falls and contacts the top of the guide rail beam.

[0009] As a further improvement and optimization of this solution, a locking element is provided between each eccentric shaft and the sliding crossbeam to lock the eccentric shaft. Each locking element includes: an elastic pin plug installed on the sliding crossbeam and a locking pin hole radially disposed on the eccentric shaft, wherein the elastic pin plug and the locking pin hole are locked together.

[0010] As a further improvement and optimization of this scheme, one end of each of the eccentric shafts has a polygonal structure.

[0011] As a further improvement and optimization of this solution, the key drop mechanism further includes: two fixed legs, which are fixed to the ground, and a support beam installed between the two fixed legs. Each fixed leg is provided with an upper hole and a lower hole for installing the support beam. When the support beam is installed in the upper hole, the other end of a plurality of key conveying components is horizontally supported on the support beam. When the support beam is installed in the lower hole, the other end of a plurality of key conveying components is disengaged from the support beam.

[0012] As a further improvement and optimization of this solution, the connector includes several connecting plates, which are respectively connected to the sliding crossbeam and the guide rail beam by bolts.

[0013] As a further improvement and optimization of this solution, each of the cam mechanisms includes a driving component, which is connected to the cam transmission to drive the cam to rotate. The driving component is a motor drive.

[0014] A maintenance method, comprising any one of the above-described quick-maintenance piano key drop mechanism, the method comprising: S1: Adjust the height of the support beam so that the support beam is supported on the bottom of the other end of the plurality of piano key conveying assemblies; S2: Rotate the cams so that the cams disengage from the bottom of the key conveying assemblies respectively; S3: Remove the connector between the sliding crossbeam and the guide beam; S4: Slide the sliding crossbeam and several of the cam mechanisms along one end of the guide beam to perform the inspection operation.

[0015] The positive effects of the above technical solution compared with the existing technology are: (1) By designing the drive component as a sliding installation form, the present invention realizes the quick disassembly and maintenance of the drive component. During maintenance, it is not necessary to stop the entire piano key drop plate, which reduces the downtime of the production line and reduces economic losses.

[0016] (2) The adjustable caster of the present invention provides auxiliary support when pulling out and installing the sliding crossbeam, reducing the burden of manual operation and making the operation more labor-saving and safer.

[0017] (3) During maintenance, the present invention drives the roller bearing to rotate eccentrically by rotating the bias shaft so that the roller bearing contacts the top end face of the guide rail, the sliding crossbeam is pushed up and disengaged from the top of the guide rail beam, and the roller bearing and the guide rail are rolled together to facilitate pushing the drive assembly to one side.

[0018] (4) When the drive assembly is being repaired or installed, the constant rolling cooperation between the guide roller and the side of the guide rail plays an auxiliary limiting role in the sliding beam, preventing the sliding beam from tilting when it is pulled out for repair or pushed in for installation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a quick-maintenance piano key drop mechanism according to the present invention; Figure 2 This is a top view of a quick-access piano key drop mechanism according to the present invention; Figure 3 This is a schematic diagram of the drive assembly of a quick-maintenance piano key drop mechanism according to the present invention. Figure 4 This is a schematic diagram of the installation of the roller bearing and guide roller of a quick-maintenance piano key drop mechanism according to the present invention. Figure 5 This is a schematic diagram of the support beam of the quick-maintenance piano key drop mechanism of the present invention in the supported state. Figure 6 This is a schematic diagram of the structure of a quick-maintenance piano key drop mechanism under maintenance conditions according to the present invention. In the attached diagram: 1. Frame; 2. Key conveyor assembly; 3. Drive assembly; 4. Support beam; 5. Fixed support leg; 6. Servo motor; 7. Drive shaft; 21. Key arm; 22. Conveyor roller; 23. Support wheel; 31. Cam mechanism; 32. Sliding crossbeam; 33. Guide rail beam; 34. Adjustable caster; 35. Connector; 36. Top screw frame; 37. Elastic pin plug; 41. Pad; 311. Cam; 321. Roller bearing; 322. Eccentric shaft; 323. Guide roller; 331. Guide rail; 3221. Locking pin hole. Detailed Implementation

[0020] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be noted that terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not 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 this invention. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Figure 1 This is a schematic diagram of a quick-maintenance piano key drop mechanism according to the present invention; Figure 2 This is a top view of a quick-access piano key drop mechanism according to the present invention; Figure 3 This is a schematic diagram of the drive assembly of a quick-maintenance piano key drop mechanism according to the present invention. Figure 4 This is a schematic diagram of the installation of the roller bearing and guide roller of a quick-maintenance piano key drop mechanism according to the present invention. Figure 5 This is a schematic diagram of the support beam of the quick-maintenance piano key drop mechanism of the present invention in the supported state. Figure 6 This is a schematic diagram of the structure of a quick-maintenance piano key drop mechanism under maintenance conditions according to the present invention, as shown below. Figure 1-6The diagram illustrates a preferred embodiment of a quick-access piano key drop mechanism, comprising: a frame 1, several key conveying assemblies 2, a drive assembly 3, and a support beam 4. The key conveying assemblies 2 are arranged along the length of the frame 1, with one end of each assembly 2 rotatably mounted on the frame 1. The support beam 4 is located below the other end of each key conveying assembly 2 and is longitudinally adjustable. The drive assembly 3 drives each key conveying assembly 2 to swing. The drive assembly 3 includes: a guide beam 33, a sliding crossbeam 32, several cam mechanisms 31, and a connecting member 35. The guide beam 33 is arranged along the length of the frame 1. The sliding beam 32 is fixed on the ground below the key conveying components 2. It can be slidably installed on the guide beam 33 along the length of the guide beam. Several cam mechanisms 31 are installed on the sliding beam 32. The several cam mechanisms 31 are used to drive the several key conveying components 2 to swing. Each cam mechanism 31 includes a rotatable cam 311. The several cams 311 are supported on the bottom of the several key conveying components 2. By rotating the cams 311, the key conveying components 2 are driven to swing. The connecting piece 35 is detachably connected between the guide beam 33 and the sliding beam 32 to connect the guide beam 33 and the sliding beam 32.

[0024] During normal production, the drive assembly 3 drives the piano key conveying assembly 2 to swing via the guide beam 33 and the sliding crossbeam 32, using the cam mechanism 31 to achieve the sorting and conveying of glass plates. When maintenance is required, the support beam 4 is first adjusted to a suitable position to support the piano key conveying assembly 2, and then the drive assembly 3 is operated to disconnect the connecting piece 35, and the sliding crossbeam 32 and the cam mechanism 31 are pulled out from the guide beam 33 for maintenance.

[0025] In this application, by designing the drive component 3 as a sliding installation form, the drive component 3 can be quickly disassembled and repaired. During repair, it is not necessary to stop the entire key drop plate, which reduces production line downtime and economic losses.

[0026] Furthermore, in a preferred embodiment, the top of the guide beam 33 has two guide rails 331, which are arranged in parallel and each guide rail 331 is arranged along the length direction of the guide beam 33; the sliding crossbeam 32 is provided with two sets of sliding members, which are located at both ends of the sliding crossbeam 32 respectively. Each sliding member includes two roller bearings and two guide rollers 323 rotatably mounted on the sliding crossbeam 32; the two roller bearings 321 are in rolling engagement with the top of the two guide rails 331, and the two guide rollers 323 are in rolling engagement with the mutually distant sides of the two guide rails 331 respectively.

[0027] Furthermore, as a preferred embodiment, adjustable casters 34 are provided at each of the four corners of the sliding beam 32, and the height of the casters 34 is adjustable. When the sliding beam 32 needs to be pulled out, the height of the casters 34 is adjusted so that they contact the ground, providing auxiliary support for the sliding beam 32. During the pulling process, the casters move with the sliding beam 32, sharing some of the weight. When reinstalling, the height of the casters 34 is adjusted so that they are off the ground.

[0028] Specifically, the adjustable caster 34 provides auxiliary support when pulling out and installing the sliding crossbeam 32, reducing the burden of manual operation and making the operation more labor-saving and safer.

[0029] Furthermore, in a preferred embodiment, the sliding member further includes two eccentric shafts 322, which are rotatably mounted on the sliding beam 32, and both roller bearings 321 are eccentrically sleeved on the outside of the two eccentric shafts 322; The height difference created by rotating the eccentric shaft 322 to drive the roller bearing 321 to rotate eccentrically causes the roller bearing 321 to contact or disengage from the top end face of the guide rail 331 and from the top of the sliding beam 32 to the top of the guide rail beam 33. When the roller bearing 321 contacts the top end face of the guide rail 331, the sliding beam 32 is pushed upward and disengages from the top of the guide rail beam 33. When the roller bearing 321 disengages from the top end face of the guide rail 331, the sliding beam 32 falls and contacts the top of the guide rail beam 33.

[0030] During maintenance, the application rotates the bias shaft 322 to drive the roller bearing 321 to rotate eccentrically, so that the roller bearing 321 contacts the top end face of the guide rail 331, the sliding beam 32 is pushed upward and disengaged from the top of the guide rail beam 33, and the rolling engagement between the roller bearing 321 and the guide rail 331 makes it easier to push the drive assembly 3 to one side.

[0031] Even better, during maintenance or installation of the drive components, the rolling cooperation between the guide roller 323 and the side of the guide rail 331 plays an auxiliary limiting role in the sliding beam 32, preventing the sliding beam 32 from tilting when it is pulled out for maintenance or pushed inward for installation.

[0032] Furthermore, as a preferred embodiment, a locking element is provided between each eccentric shaft 322 and the sliding beam 32 for locking the eccentric shaft 322. Each locking element includes: an elastic pin plug 37 mounted on the sliding beam 32 and a locking pin hole 3221 radially disposed on the eccentric shaft 322. The elastic pin plug 37 and the locking pin hole 3221 are locked together.

[0033] When maintenance is required, the elastic pin plug 37 is pulled out to disengage from the limit locking pin hole 3221. When the eccentric shaft 322 rotates 180 degrees to make the roller bearing reach the maximum support height, the elastic pin plug 37 is released and automatically extends into the locking pin hole 3221 to re-lock. When installing the drive assembly 3, the elastic pin 37 is moved again, and under the action of the sliding beam 32's own weight, the roller bearing 321 is pressed to rotate eccentrically until the sliding beam 32 falls and contacts the top of the guide beam 33, and the roller bearing 321 disengages from the top end face of the guide rail 331.

[0034] Furthermore, as a preferred embodiment, one end of each eccentric shaft 322 has a polygonal structure. When operating the eccentric shaft 322, since one end of the eccentric shaft 322 has a polygonal structure, a tool of a corresponding shape (such as a wrench) can be placed on the polygonal structure to perform a rotation operation, thereby adjusting the eccentric shaft 322.

[0035] Furthermore, as a preferred embodiment, the piano key drop mechanism further includes: two fixed legs 5, which are fixed to the ground, and a support beam 4 installed between the two fixed legs 5. Each fixed leg 5 is provided with an upper hole and a lower hole for installing the support beam 4. When the support beam 4 is installed in the upper hole, the other end of several piano key conveying components is horizontally supported on the support beam 4. When the support beam 4 is installed in the lower hole, the other end of several piano key conveying components is disengaged from the support beam 4. During normal production, the support beam 4 is installed in the lower hole of the fixed leg 5, disengaging from the piano key conveying components 2, allowing the piano key conveying components 2 to swing freely. When maintenance is required, the support beam 4 is installed in the upper hole, supporting the other end of the piano key conveying components 2, making it a fixed conveyor roller to continue conveying glass.

[0036] Furthermore, in a preferred embodiment, the connector 35 includes several connecting plates, which are respectively bolted to the sliding crossbeam 32 and the guide rail beam 33. The connecting plates are bolted to the sliding crossbeam 32 and the guide rail beam 33 to achieve connection between the two. When maintenance is required, the connection can be broken by removing the bolts, allowing the sliding crossbeam 32 to be pulled out. During reinstallation, the bolts are tightened to connect the two components.

[0037] As the sliding beam 32 falls and contacts the top of the guide beam 33, the roller bearing 321 disengages from the top end face of the guide rail 331. The sliding beam 32 and the guide rail 33 are then connected by a connecting plate and bolts to prevent relative sliding between the two during operation, which would affect the stability of the cam mechanism 31 drive.

[0038] Furthermore, in a preferred embodiment, each cam mechanism 31 includes a drive member 3, which is connected to the cam 311 for driving the cam 311 to rotate. The driving component is driven by an electric motor. When the motor is powered off, the cam 311 rotates automatically under its own gravity to disengage from the key conveying assembly 2.

[0039] A maintenance method, comprising any one of the above-mentioned quick-maintenance key drop mechanism, the method comprising: S1: Adjust the height of the support beam 4 so that the support beam 4 is supported on the bottom of the other end of several piano key conveying components 2; S2: Rotate cam 311 so that several cams 311 disengage from the bottom of several key conveying assemblies respectively; S3: Remove the connector 35 that connects the sliding crossbeam 32 and the guide rail beam; S4: Slide the sliding crossbeam 32 and several cam mechanisms 31 along one end of the guide beam 33 to perform the inspection operation.

[0040] Even better, the above-mentioned maintenance and disassembly work can be completed during the continuous glass production process. At this time, the rollers on the key arm 21 continue to transport the glass. If there is any unqualified glass, it can be temporarily handed over to the terminal crushing system for processing.

[0041] In addition to the above, the present invention also has the following embodiments: Furthermore, as a preferred embodiment, the guide beam 33 is also provided with a fine-tuning component for fine-tuning the sliding crossbeam 32. When the sliding crossbeam 32 is installed on the guide beam 33, the sliding crossbeam 32 slides to the top of the guide beam 33, the height of the adjusting caster 34 is adjusted so that the adjusting caster 34 is disengaged from the ground, and then the eccentric shaft 322 is rotated to adjust the support height of the sliding crossbeam 32 so that the roller bearing 321 is disengaged from the guide rail 331, and the sliding crossbeam 32 is supported on the guide beam 33. At this time, the fine-tuning component can be used to fine-tune the sliding crossbeam 32 so that the holes of the connecting plate are aligned with the threaded holes on the sliding crossbeam 32 and the guide beam 33. Then the connecting plate is installed and fixed with bolts.

[0042] Preferably, the fine-tuning component includes two set screw holders 36, which are detachably mounted on both ends of the guide beam 33 by bolts. By rotating the set screws threaded onto the set screw holders 36, the set screws apply force to the end of the sliding crossbeam 32, thereby fine-tuning the position of the sliding crossbeam 32. It should be noted that during maintenance, the set screw holders 36 at the corresponding positions need to be removed to avoid interference between the set screw holders 36 and the sliding crossbeam 32.

[0043] Furthermore, as a preferred embodiment, a support wheel 23 is rotatably mounted at the bottom of each piano key conveyor roller, and the outer circumferential surface of the support wheel 23 contacts the outer circumferential surface of the cam 311.

[0044] Furthermore, as a preferred embodiment, each key conveyor roller includes a key arm 21, one end of which is rotatably mounted on the frame 1. Several conveyor rollers 22 are mounted on the key arm 21, and the several conveyor rollers 22 are arranged along the length of the key arm 21. A servo motor 6 and a drive shaft 7 are mounted on the frame 1. The servo motor 6 transmits power to the multi-stage series gears inside each key arm 21 through the drive shaft 7, so as to drive all the conveyor rollers 22 to rotate synchronously.

[0045] Even better, the support wheel 23 is rotatably located at the bottom of the key arm 21.

[0046] Furthermore, as a preferred embodiment, the top of the support beam 4 has a plurality of pads 41, which are respectively supported on the bottom of the other end of the plurality of piano key conveying assemblies 2 when the support beam 4 is installed in the upper hole.

[0047] The above description is merely a preferred embodiment of the present invention and does not limit the implementation and protection scope of the present invention. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A quick-access piano key drop mechanism, characterized in that, include: The frame comprises a plurality of key conveying assemblies, a drive assembly, and a support beam. The plurality of key conveying assemblies are arranged along the length of the frame, and one end of each key conveying assembly is rotatably mounted on the frame. The support beam is located below the other end of each key conveying assembly and can be adjusted longitudinally. The drive assembly is used to drive each key conveying assembly to swing. The driving component includes: A guide beam is provided along the length of the frame and fixed to the ground below several of the piano key conveying assemblies; A sliding crossbeam, which can be slidably mounted on the guide beam along the length of the guide beam; A plurality of cam mechanisms are mounted on the sliding crossbeam. The plurality of cam mechanisms are used to drive a plurality of piano key conveying assemblies to swing. Each cam mechanism includes a rotatable cam. The plurality of cams are supported on the bottom of the plurality of piano key conveying assemblies. By rotating the cams, the piano key conveying assemblies are driven to swing. A connector, detachably connected between the guide beam and the sliding crossbeam, for connecting the guide beam and the sliding crossbeam; The top of the guide beam has two guide rails, which are arranged in parallel, and each guide rail is arranged along the length direction of the guide beam. The sliding beam is provided with two sets of sliding components, which are located at both ends of the sliding beam. Each sliding component includes two roller bearings and two guide rollers rotatably mounted on the sliding beam. The two roller bearings are in rolling engagement with the top of the two guide rails, and the two guide rollers are in rolling engagement with the mutually distant sides of the two guide rails respectively; Adjustable casters are provided at all four corners of the sliding crossbeam, and the height of the adjustable casters can be adjusted. The sliding component also includes two eccentric shafts, which are rotatably mounted on the sliding beam. Both roller bearings are eccentrically sleeved outside the two eccentric shafts. By rotating the eccentric shafts, the roller bearings are eccentrically rotated, creating a height difference that allows the roller bearings to contact or disengage from the top end face of the guide rail, and from the top of the sliding beam to the top of the guide rail beam. When the roller bearings contact the top end face of the guide rail, the sliding beam is pushed upward and disengages from the top of the guide rail beam. When the roller bearings disengage from the top end face of the guide rail, the sliding beam falls and contacts the top of the guide rail beam.

2. The quick-access piano key drop mechanism according to claim 1, characterized in that, Each of the eccentric shafts is provided with a locking element between it and the sliding crossbeam for locking the eccentric shaft. Each locking element includes: an elastic pin plug installed on the sliding crossbeam and a locking pin hole radially disposed on the eccentric shaft. The elastic pin plug and the locking pin hole are locked together.

3. The quick-access piano key drop mechanism according to claim 2, characterized in that, One end of each of the eccentric shafts has a polygonal structure.

4. The quick-access piano key drop mechanism according to claim 1, characterized in that, The key drop mechanism further includes: two fixed legs, which are fixed to the ground, and a support beam installed between the two fixed legs. Each fixed leg is provided with an upper hole and a lower hole for installing the support beam. When the support beam is installed in the upper hole, the other end of a plurality of key conveying components is horizontally supported on the support beam. When the support beam is installed in the lower hole, the other end of a plurality of key conveying components is disengaged from the support beam.

5. The quick-access piano key drop mechanism according to claim 1, characterized in that, The connector includes several connecting plates, which are respectively connected to the sliding crossbeam and the guide rail beam by bolts.

6. The quick-access piano key drop mechanism according to claim 1, characterized in that, Each of the cam mechanisms includes a drive member that is connected to the cam drive and is used to drive the cam to rotate. The driving component is a motor drive.

7. A maintenance method, characterized in that, Including the quick-access piano key drop mechanism according to any one of claims 1-6, the method includes: S1: Adjust the height of the support beam so that the support beam is supported on the bottom of the other end of the plurality of piano key conveying assemblies; S2: Rotate the cams so that the cams disengage from the bottom of the key conveying assemblies respectively; S3: Remove the connector between the sliding crossbeam and the guide beam; S4: Slide the sliding crossbeam and several of the cam mechanisms along one end of the guide beam to perform the inspection operation.

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