CN217562238U

CN217562238U - Piano center disk deformation prevention structure and piano thereof

Info

Publication number: CN217562238U
Application number: CN202220690769.0U
Authority: CN
Inventors: 柳毅; 杨超; 凌绪华; 丁威
Original assignee: Yichang Jinbao Music Instrument Manufacture Co ltd
Current assignee: Yichang Jinbao Music Instrument Manufacture Co ltd
Priority date: 2022-03-28
Filing date: 2022-03-28
Publication date: 2022-10-11
Anticipated expiration: 2032-03-28

Abstract

The utility model provides a piano center disk shape structure and piano of preapring for an unfavorable turn of events, includes the big shelves of center disk, the big shelves of center disk include trough-shaped structural support piece, and set up a plurality of backup pads in the support piece, the inside backup pad that has held of support piece plays and supports firm effect, increases support piece's structural strength, and the big shelves stable in structure of center disk can also prevent to make support piece warp because of the pulling force of fastener. The utility model provides a piano, includes pedal system and well dish, the well dish pass support piece's first mounting hole and the second mounting hole of backup pad through first fastener connect in the upper portion of the big shelves of well dish, the pedal system is located the lower part of the big shelves of well dish is connected on the nut structure of the big shelves of well dish through the second fastener, and assembled structure is convenient to be dismantled, transported and assembled.

Description

Piano central disc anti-deformation structure and piano thereof

Technical Field

The utility model relates to a piano field especially relates to a piano center disk shape structure of preapring for an unfavorable turn of events to and an adopt this center disk shape structure of preapring for an unfavorable turn of events's piano.

Background

At present, the large middle disc gear of the existing middle disc anti-deformation device for the triangular piano on the market adopts a traditional structure and is basically a wood part, and the large middle disc gear has the defects of large weight, difficulty in processing, high cost, easiness in deformation, low strength and poor stability. The large wooden middle plate is of a solid structure and heavy, workers need to adopt a large number of machines and tools to process shapes, and in the process, in order to reduce deformation and guarantee functions, the large wooden middle plate is processed by adopting a wooden material which is good in quality and relatively high in cost.

Chinese patent document CN212934118U, published \ published: 2021/04/09, discloses a reinforced middle disc device for a piano, which comprises a middle disc body, wherein the middle disc body is of a strip-shaped rectangular structure, a plurality of through holes are uniformly and vertically formed in the middle disc body along the length direction, pull rods are inserted into the through holes, a fixed plate is arranged on one side of the middle disc body along the length direction, and the inner side of the fixed plate is fixedly connected with the end parts of the pull rods through threads. The device is characterized by simple structure and capability of reducing the warping deformation of the middle disc; but the fixing plate is a flat plate, and when a force is vertically applied to the plane of the flat plate, the flat plate is subjected to buckling deformation. The deformation of the wood is not in a single direction, and the stress structure stability of the fixing plate is not enough.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the first technical problem that will solve is: the problem of exist among the above-mentioned background art is solved, a stable in structure, non-deformable's piano center plate structure of preapring for an unfavorable turn of events is provided.

The utility model discloses another technical problem who solves is: the piano with the anti-deformation structure of the piano center plate is provided.

In order to realize the technical characteristics, the purpose of the utility model is realized as follows: the utility model provides a piano center disk shape structure of preapring for an unfavorable turn of events, includes the big shelves of center disk, its characterized in that: the middle disc big gear comprises a groove-shaped structure supporting piece and a plurality of supporting plates arranged in the supporting piece; the bottom of the supporting piece is provided with a plurality of nut mounting holes and a plurality of pairs of first mounting holes, and each nut mounting hole is provided with a nut structure in the supporting piece; the supporting plate corresponds to the first mounting hole respectively in position, and a second mounting hole penetrating through the supporting plate is arranged in a position corresponding to the first mounting hole.

The notches on two sides of the supporting piece extend inwards to form end parts, and the first mounting hole extends upwards to form a through hole.

The first mounting hole is a countersunk hole at one side of the lower part of the support.

The nut structure is an independent nut and is connected to the corresponding position of the nut mounting hole.

And a step is arranged at the joint of the nut and the nut mounting hole.

The nut structure is integrally formed through the support piece.

The nut structure is a flange extending through the nut mounting hole.

The support plate is provided with a bulge at an opening between two ends of the support member, and the bulge is flush with or slightly lower than the upper surface of the end part of the support member.

A piano comprises a pedal system and a middle disc, wherein the pedal system is connected with the middle disc through a middle disc large gear of the piano middle disc deformation prevention structure; the middle disc is connected to the upper portion of the large gear of the middle disc through a first fastener penetrating through a first mounting hole of the supporting piece and a second mounting hole of the supporting plate, and the pedal system is located on the lower portion of the large gear of the middle disc and connected to the nut structure of the large gear of the middle disc through a second fastener.

The utility model discloses there is following beneficial effect:

1. the supporting piece adopts a groove-shaped structure, can bear force from multiple sides, has high structural strength, and has stable structure no matter the force is applied to the supporting piece from the transverse direction or the longitudinal direction or from the two directions. The supporting plate is supported and accommodated in the supporting piece, and when the fastening piece enables the supporting piece to be connected with other parts, the supporting plate plays a role in supporting and stabilizing, so that the structural strength of the supporting piece is further increased, and the deformation of the supporting piece caused by the pulling force of the fastening piece can be prevented;

2. the middle plate large gear with the deformation-preventing structure is used as a middle connecting piece of the piano middle plate and the pedal system, so that the strength of the middle plate is improved, and the stability of the pedal system is also enhanced;

3. the pedal system and the large middle plate are of an assembled structure, so that the pedal system and the large middle plate are convenient to disassemble, transport and assemble.

Drawings

Fig. 1 is the utility model discloses the main structure sketch map of deformation structure is prevented to piano center disk.

Fig. 2 is the structural schematic diagram of the piano center disk deformation-preventing structure viewed from above.

Fig. 3 isbase:Sub>A schematic view of the cross-sectional structurebase:Sub>A-base:Sub>A in fig. 2.

Fig. 4 is a schematic view of the structure of the middle support plate of the present invention.

Fig. 5 is a schematic view of the nut structure of the present invention being independent.

Fig. 6 is a schematic view of the nut structure of the present invention.

Fig. 7 is an enlarged schematic view of the structure at B in fig. 5 according to the present invention.

Fig. 8 is the structural diagram of the piano of the present invention.

In the figure:

a pedal system 10, a second fastener 11;

a center plate 20, a first fastening member 21;

middle plate big rail 30, support 31, nut mounting hole 311, first mounting hole 312, end 313, opening 314, support plate 32, second mounting hole 321, protrusion 322, nut structure 33, step 331.

Detailed Description

The following describes embodiments of the present invention with reference to the accompanying drawings.

Referring to fig. 1 to 6, a piano center plate deformation preventing structure includes a center plate large rail 30, the center plate large rail 30 including a groove-shaped structural support 31, and a plurality of support plates 32 disposed inside the support 31; a plurality of nut mounting holes 311 and a plurality of pairs of first mounting holes 312 are arranged at the bottom of the supporting piece 31, and each nut mounting hole 311 is provided with a nut structure 33 in the supporting piece 31; the supporting plates 32 correspond to the first mounting holes 312, and second mounting holes 321 are disposed at positions corresponding to the first mounting holes 312. The supporting member 31 has a groove-shaped structure, so that the structural strength is increased, and the supporting member 31 is not deformed or is deformed by a small amount and is stable regardless of the force applied to the supporting member 31 from the transverse direction, the longitudinal direction or both. Further, the supporting plate 32 is supported and accommodated inside the supporting member 31, and when the supporting member 31 is connected to other components by using the fastening member, the supporting plate 32 plays a role of supporting and stabilizing inside, thereby further increasing the structural strength of the supporting member 31 and preventing the deformation of the supporting member 31 due to the tensile force of the fastening member. In the preferred scheme, the supporting member 31 is made of common metal, so that the processing is convenient and the cost is low; of course, other non-metallic materials may be used, but the processing is larger and the cost is higher. The supporting member 31 may be formed by a mold, or by bending, or by cold-press roll-bending. Both metal and non-metal materials can be formed through a die, so that the processing is convenient, but the die is limited, so that the die is more suitable for batch production with a single size; bending forming and cold-press roll bending forming are suitable for metal materials, and the bending forming is relatively flexible and can be suitable for processing of various sizes; in addition, the cold-pressing roll bending forming is suitable for large-batch production, the cut materials can be put into a cold-pressing roll bending forming machine for production, steel rings can also be used, the batch production of fixed sizes is realized, and the efficiency is high. The support plate 32 is preferably a wood material that not only provides sufficient structural strength, but also is lightweight and easy to carry.

In a preferred embodiment, as shown in fig. 3 and 5, the notches on both sides of the supporting member 31 extend inward to form end portions 313, and the first mounting holes 312 extend upward to form through holes through the end portions 313. The end portions 313 further reinforce the structural strength of the support 31, and the support plate 32 is engaged with the support 31, so that the structure is more stable, and the structural strength of the upper side and the left and right sides of the support 31 is further increased. The fastener is inserted at one end through a first mounting hole 312 at the bottom of the support member 31 and further upwardly through a second mounting hole 321 of the support plate 32 and protrudes from an end 313 of the support member 31 to be coupled with other components, so that the support member 31 and the support plate 32 are formed as a unitary structure.

In a preferred embodiment, as shown in fig. 5, the first mounting hole 312 is a countersunk hole at a side of the lower portion of the supporting member 31, so as to be engaged with a countersunk screw, and prevent the screw from protruding and interfering with the mounting of other components.

In a preferred embodiment, as shown in fig. 3, 5 and 7, the nut structure 33 is a separate nut and is connected to a position corresponding to the nut mounting hole 311. The independent nut can be a hexagonal nut or a round nut, and can also be a nut with other shapes, and the nut can be connected to the position of the nut mounting hole through a common method, such as welding. In addition to welding, it is also possible to eliminate structural deformation due to welding by screwing a thread provided on the outer periphery of the nut to a thread provided in the nut mounting hole, and the direction in which the nut is screwed to the nut mounting hole is preferably reversed so that the nut does not fall off when the bolt is tightened. The nut can also be a press riveting nut, and the press riveting nut is installed on the nut installation hole through a press riveting tool, so that the operation is convenient.

Further, as shown in fig. 5 and 7, a step 331 is provided at the joint of the nut and the nut mounting hole 311, so that the end of the nut is easily inserted and positioned at the position of the nut mounting hole 311.

In another preferred embodiment of the nut structure 33, as shown in fig. 6, the nut structure 33 is integrally formed with the support member 31, so that the problems of micro deformation of the support member 31 caused by welding, increase of parts and parts due to nut assembly, and complicated process can be solved.

Further, as shown in fig. 6, the nut structure 33 is a flange extending through the nut mounting hole 311, the flange can be formed by hot melting or deep drawing, and then is tapped to form the nut structure after forming.

In a preferred embodiment, as shown in fig. 3 and 4, the supporting plate 32 is provided with a protrusion 322 at the opening 314 between the two ends 313 of the supporting member 31, and the protrusion 322 is flush with or slightly lower than the upper surface of the ends 313 of the supporting member 31. The connection with other upper parts is facilitated, and the deformation of the upper parts caused by the protrusion 322 of the support plate 32 against other upper parts when the connection with other upper parts is made is prevented.

Referring to fig. 8, a piano comprises a pedal system 10 and a central disc 20, the pedal system 10 and the central disc 20 are connected through a central disc large step 30 of the above piano central disc deformation preventing structure; the middle plate 20 is connected to the upper portion of the middle plate large rail 30 by the first fastening member 21 passing through the first mounting hole 312 of the supporting member 31 and the second mounting hole 321 of the supporting plate 32, and the pedal system 10 is located at the lower portion of the middle plate large rail 30 and connected to the nut structure 33 of the middle plate large rail 30 by the second fastening member 11. The supporting member 31 is a groove-shaped structure, the structural strength is high, the structure is stable, the supporting plate 32 is arranged in the supporting member 31, when the supporting member 31 is connected with other components by using the fastening member, the supporting plate 32 plays a role in supporting and stabilizing, the structural strength of the supporting member 31 is increased, and the supporting member 31 can be prevented from being deformed due to the tensile force of the fastening member. The middle disc 20 is connected to the upper part of the middle disc large crosspiece 30 by the first fastening member 21 passing through the first mounting hole 312 of the supporting member 31 and the second mounting hole 321 of the supporting plate 32, the pedal system 10 is located at the lower part of the middle disc large crosspiece 30 and is connected to the nut structure 33 of the middle disc large crosspiece 20 by the second fastening member 11, and the assembly structure is convenient to disassemble, transport and assemble.

The utility model discloses a working process and principle:

in the specific installation process, the support plate 32 is firstly placed in the support member 31, and the first fastening member 21 passes through the first installation hole 312 at the bottom of the support member 31, further passes upward through the second installation hole 321 of the support plate 32, and extends out from the end 313 of the support member 31 to be connected with the installation position at the bottom of the middle disc 20, so that the middle disc 20 is fixed at the upper part of the middle disc large rail 30. The large middle plate rail 30 and the connected large middle plate 20 are then placed on the pedal system 10, and the second fastening member 11 is connected with the nut structure 33 in the support 31 of the large middle plate rail 30 after passing through the mounting hole of the pedal system 10. The disassembly, the transportation and the assembly are convenient.

Claims

1. The utility model provides a piano center disk shape structure of preapring for an unfavorable turn of events, includes the big shelves (30) of center disk, its characterized in that: the center console (30) comprises a groove-shaped structural support (31) and a plurality of support plates (32) arranged in the support (31); a plurality of nut mounting holes (311) and a plurality of pairs of first mounting holes (312) are formed in the bottom of the supporting piece (31), and a nut structure (33) is arranged in the supporting piece (31) through each nut mounting hole (311); the supporting plates (32) correspond to the first mounting holes (312) in position respectively, and second mounting holes (321) penetrating through the supporting plates are arranged in positions corresponding to the first mounting holes (312).

2. The deformation preventing structure for a piano center plate of claim 1, wherein notches at both sides of the supporting member (31) are extended inward to form end portions (313), and the first mounting holes (312) are extended upward through the end portions (313) to form through holes.

3. The deformation preventing structure for a piano center plate of claim 2, wherein the first mounting hole (312) is a counter bore at a side of a lower portion of the supporter (31).

4. The structure of preventing deformation of a piano center plate of claim 1, wherein the nut structure (33) is a separate nut coupled to a corresponding position of the nut installation hole (311).

5. The deformation preventing structure of a piano center plate of claim 4, wherein a step (331) is provided at a junction of the nut and the nut installation hole (311).

6. The deformation preventing structure of a piano center plate according to claim 1, wherein the nut structure (33) is integrally formed by a support (31).

7. The deformation preventing structure of a piano center plate of claim 6, wherein the nut structure (33) is a burring extending through the nut mounting hole (311).

8. The deformation preventing structure for a piano squab according to claim 1, wherein said supporting plate (32) is provided with a protrusion (322) at an opening (314) between both end portions (313) of the supporting member (31), said protrusion (322) being flush with or slightly lower than an upper surface of the end portion (313) of the supporting member (31).

9. A piano comprising a pedal system (10) and a center plate (20), and the piano center plate deformation preventing structure of any one of claims 1 to 8, characterized in that: the pedal system (10) is connected with the middle disc (20) through a middle disc large gear (30); the middle disc (20) is connected to the upper part of the middle disc large gear (30) through a first fastening piece (21) penetrating through a first mounting hole (312) of the support piece (31) and a second mounting hole of the support plate (32), and the pedal system (10) is positioned at the lower part of the middle disc large gear (30) and connected to the nut structure (33) of the middle disc large gear (30) through a second fastening piece (11).