Cutting and grinding tool for tail part of hammer head of grand piano

Abstract

The utility model discloses a grand piano hammer head tail cutting and grinding tool which comprises a base, a lifting bolt and a cutting and grinding clamp, and the lifting bolt is fixed at the bottom of the base and penetrates to the top of the base. The cutting and grinding clamp comprises a clamping plate which is installed on the lifting bolt and can be adjusted by the lifting bolt to move horizontally, rotate and ascend and descend, a hammer head placing table which is connected with the side edge of the clamping plate and is lower than the side edge of the clamping plate, and a spring clamp which is installed on the clamping plate and can clamp and fix a hammer head placed on the hammer head placing table. According to the utility model, the movement of the shaft can be realized, the hammer head can do circular motion by taking the bolt as the circle center, and the required tail radian of the hammer head can be cut and ground, so that the operation difficulty of an operator is greatly reduced, and the operation efficiency is improved. And the structural design of the tool is optimized, and the yield and the operation efficiency of replacement, repair and adjustment of the hammer head of the grand piano are improved and simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding equipment, in particular to a tool for cutting and grinding the tails of grand piano hammers. Background Art

[0002] Hammers are an important component of the piano's action. Since the piano is an instrument consisting of 88 keys and a metal string soundboard, the piano produces sound by generating vibrations when the hammers strike the strings, which in turn pass through the bridge and soundboard. The 88 keys correspond to 88 hammers, that is, the 88 hammers form a hammer group. Different hammers will produce different sounds after hitting the strings, so the quality of the hammers is crucial to the piano's tone.

[0003] During the preparation of the hammer, fibers protrude from the felt surface, increasing the roughness of the finished hammer and affecting the timbre of the finished piano. Therefore, the outer wall of the felt needs to be polished smooth. Currently, this polishing process is typically performed using a stand-alone fixture that is not adaptable to different types of belt sanders or other grinding machines. Furthermore, achieving extremely precise processing accuracy requires extensive operational experience when cutting and grinding the hammer. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] Therefore, the purpose of the present invention is to provide a tool for cutting and grinding the tail of a grand piano hammer, which can be applied to different types of belt sanders and grinding machines, has high processing accuracy, and does not require extensive operating experience.

[0006] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0007] A tool for cutting and grinding the tail of a grand piano hammer, comprising:

[0008] base;

[0009] A lifting bolt is fixed to the bottom of the base and extends to the top of the base;

[0010] The cutting and grinding fixture includes a clamping plate mounted on the lifting bolt and capable of horizontal movement, rotation, and elevation adjustment by the lifting bolt, a hammer head placement table connected to the side of the clamping plate and lower than the height thereof, a spring clamp mounted on the clamping plate and capable of clamping and fixing the hammer placed on the hammer head placement table, and a head screw for the knob on the side of the clamping plate;

[0011] Wherein, a hammer handle groove which passes through from top to bottom is provided at a position near the head screw on the side of the splint.

[0012] As a preferred solution of the grand piano hammer tail grinding tool described in the utility model, angle fine-tuning knobs are provided at the four corners of the bottom of the base, and a spirit level is provided on the top of the base.

[0013] As a preferred solution of the grand piano hammer tail cutting and grinding tool described in the utility model, the shape of the splint is triangular, the short side of the triangular splint is provided with an inclined surface, and the head screw knob is on the side wall of the short side of the triangular splint.

[0014] As a preferred solution of the grand piano hammer tail cutting and grinding tool described in the utility model, the lifting bolt includes a threaded barrel, a threaded column that cooperates with the threaded barrel to lift and lower the knob, and the splint is installed on the threaded column.

[0015] As a preferred solution of the grand piano hammer tail grinding tool described in the utility model, a sawtooth track is provided on the plywood;

[0016] The threaded column also includes an upper external thread, and a horizontal blocking piece is provided on the outer wall of the threaded column located below the upper external thread. The threaded column passes through the serrated track, and a threaded cap is provided on the upper knob of the upper external thread.

[0017] As a preferred solution of the grand piano hammer tail grinding tool described in the utility model, a knob portion is provided on the top of the threaded column.

[0018] As a preferred solution of the grand piano hammer tail cutting and grinding tool described in the utility model, the spring clamp includes a hinged seat installed on the clamping plate, a pressure plate hinged to the hinged seat in the middle, a spring arranged between the lower right side of the pressure plate and the clamping plate, and a pressure portion arranged at the end of the pressure plate.

[0019] Compared with the existing technology, the beneficial effects of the present invention are as follows: the present invention can realize the movement of the axis by adjusting the fixture platform through the lifting bolt, and make circular motion with the bolt as the center, cutting and grinding the required curvature of the hammer tail, greatly reducing the operating difficulty of the operator, and optimizing the structural design of the tool. In addition to the cutting and grinding fixture, by adding a spirit level and a multi-angle level adjustment base, the yield rate and operating efficiency of the replacement, repair and adjustment of the grand piano hammers are improved and simplified. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive labor. Among them:

[0021] Figure 1 This is a schematic diagram of the overall structure of a tool for cutting and grinding the tail of a grand piano hammer according to the present invention;

[0022] Figure 2 This is a disassembled diagram of the lifting bolt of a grand piano hammer tail grinding tool according to the present invention;

[0023] Figure 3 The utility model is a schematic structural diagram of a cutting and grinding fixture of a tool for cutting and grinding the tail of a grand piano hammer. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] Next, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, cross-sectional views of device structures may be partially enlarged and not to scale when describing the embodiments of the present invention. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0027] The utility model provides a cutting and grinding tool for the tail of a grand piano hammer, which is applicable to different types of sanding machines and grinding machines, has high processing precision, and does not require operators with rich operating experience.

[0028] Figure 1-Figure 3 The following is a schematic diagram of a cutting and grinding tool for the tail of a grand piano hammer according to the present invention. Figure 1-Figure 3 The present embodiment is a cutting and grinding tool for the tail of a grand piano hammer, the main body of which includes a base 100, a lifting bolt 200 and a cutting and grinding fixture 300.

[0029] The base 100 is used to be fixed on the fixed platform of the cutting and grinding machine slide and support the cutting and grinding fixture 300. In this embodiment, angle fine-tuning knobs 110 are provided at the four corners of the bottom of the base 100, and a spirit level 120 is provided on the top of the base 100. By observing the spirit level 120 and then adjusting the height and angle of the workbench through the angle fine-tuning knob 110, the angle and height of the base 100 are pre-adjusted when the work surface is uneven.

[0030] The lifting bolt 200 is fixed to the bottom of the base 100 and passes through the top of the base 100 to adjust the horizontal position, angle and height of the cutting and grinding fixture 300. Specifically, in this embodiment, the lifting bolt 200 includes a threaded barrel 210 and a threaded column 220 that cooperates with the threaded barrel 210 to be raised and lowered by turning the knob. The clamping plate 310 is installed on the threaded column 220. When the height of the clamping plate 310 needs to be adjusted, the height of the clamping plate 310 can be raised and lowered by turning the knob threaded column 220. In this embodiment, a sawtooth track 310b is provided on the clamping plate 310, and the threaded column 220 also includes an upper external thread 220a. The outer wall of the threaded column 220 is located at the lower part of the upper external thread 220a and is provided with a horizontal baffle 220b. The threaded column 220 passes through the serrated track 310b, and the knob on the upper external thread 220a is provided with a threaded cap 230. The splint 310 can be fixed or loosened by turning the knob threaded cap 230 so that the splint 310 can be horizontally moved relative to the lifting bolt 200 through the serrated track 310b to adjust the position of the splint 310, or the angle of the splint 310 can be horizontally rotated with the lifting bolt 200 as the axis to adjust the angle. Preferably, a knob portion 220c is provided on the top of the threaded column 220 to facilitate turning the knob of the threaded column 220.

[0031] The cutting and grinding fixture 300 is used to fix the hammer. Specifically, the cutting and grinding fixture 300 includes a clamping plate 310 installed on the lifting bolt 200 and adjustable by the lifting bolt 200 for horizontal movement, rotation and lifting, a hammer head placement table 320 connected to the side of the clamping plate 310 and lower than its height, a spring clamp 330 installed on the clamping plate 310 and capable of clamping and fixing the hammer placed on the hammer head placement table 320, and a top screw 340 with a knob on the side of the clamping plate 310, wherein the clamping plate 310 is in the shape of a triangle, the short side of the triangular clamping plate 310 is provided with an inclined surface 310c, and the knob of the top screw 340 is on the short side wall of the triangular clamping plate 310, and the spring clamp 330 includes a clamping plate 330 installed on the clamping plate 310 The hinge seat 330a on the plate 310, the pressing plate 330b hinged to the hinge seat 330a in the middle, the spring 330c arranged between the lower right side of the pressing plate 330b and the clamping plate 310, and the pressing portion 330d arranged at the end of the pressing plate 330b. When it is necessary to grind the hammer, the pressing portion 330d is moved upward, and the spring 330c is compressed. The hammer is placed on the hammer head placement table 320, and then the pressing portion 330d is released. At this time, the pressing portion 330d clamps the hammer on the hammer head placement table 320. When it is necessary to grind the tail of the hammer, the hammer handle is placed in the hammer handle groove 310a, and then the knob head screw 340 is turned to support and fix the tail of the hammer head for grinding.

[0032] While the present invention has been described above with reference to specific embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, as long as no structural conflicts exist, the various features of the embodiments disclosed herein may be combined with one another in any manner, and the omission of an exhaustive description of these combinations in this specification is solely for the sake of space and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A tool for cutting and grinding the tail of a grand piano hammer, characterized in that: include: Base (100); A lifting bolt (200) is fixed to the bottom of the base (100) and extends through the top of the base (100); The cutting and grinding fixture (300) comprises a clamping plate (310) mounted on the lifting bolt (200) and capable of being adjusted by the lifting bolt (200) to move horizontally, rotate and lift, a hammer head placement table (320) connected to the side of the clamping plate (310) and lower than the height thereof, a spring clamp (330) mounted on the clamping plate (310) and capable of clamping and fixing the hammer placed on the hammer head placement table (320), and a head screw (340) with a knob on the side of the clamping plate (310); A hammer handle groove (310a) extending vertically is provided on the side of the clamping plate (310) near the top screw (340).

2. A grand piano hammer tail cutting and grinding tool according to claim 1, characterized in that: Angle fine-tuning knobs (110) are provided at the four corners of the bottom of the base (100), and a level (120) is provided at the top of the base (100).

3. The grand piano hammer tail grinding tool according to claim 1, characterized in that: The shape of the clamping plate (310) is triangular, the short side of the triangular clamping plate (310) is provided with an inclined surface (310c), and the knob of the head screw (340) is on the side wall of the short side of the triangular clamping plate (310).

4. The grand piano hammer tail grinding tool according to claim 1, wherein: The lifting bolt (200) comprises a threaded barrel (210), a threaded column (220) that cooperates with the threaded barrel (210) to be raised and lowered by a knob, and the clamping plate (310) is mounted on the threaded column (220).

5. The tool for cutting and grinding the tail of a grand piano hammer according to claim 4, wherein: The clamping plate (310) is provided with a sawtooth track (310b); The threaded column (220) further comprises an upper external thread (220a), an outer wall of the threaded column (220) is provided with a horizontal baffle (220b) at the lower portion of the upper external thread (220a), the threaded column (220) passes through the sawtooth track (310b), and a threaded cap (230) is provided on the knob of the upper external thread (220a).

6. A grand piano hammer tail grinding tool according to claim 4 or 5, characterized in that: The top of the threaded column (220) is provided with a knob portion (220c).

7. The tool for cutting and grinding the tail of a grand piano hammer according to claim 1, wherein: The spring clamp (330) includes a hinge seat (330a) mounted on the clamping plate (310), a pressing plate (330b) hinged to the hinge seat (330a) at its middle, a spring (330c) arranged between the lower right side of the pressing plate (330b) and the clamping plate (310), and a pressing portion (330d) arranged at the end of the pressing plate (330b).

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