Clamp for machining arc-shaped inclined surface of hammer

Abstract

The utility model belongs to the technical field of piano manufacturing and maintenance, and particularly relates to a clamp for machining an arc-shaped inclined plane of a hammer, which comprises a mounting plate, a fixing plate is arranged at the top of the mounting plate, a transverse clamping groove is formed in the middle of the upper surface of the mounting plate, and vertical circular through holes are formed in the middle of the top wall of the fixing plate and the middle of the bottom wall of the mounting plate. A transverse long groove is formed in the position, under the clamping groove, of the middle of the bottom wall of the mounting plate and close to the right side, and the long groove is communicated with the through hole. The mounting plate is detachably and rotatably arranged on the top wall of the bottom plate, the metal shaft pin on the bottom plate is inserted into the slotted hole of the long slot, the side wall of the fixing plate is in threaded connection with a longitudinal fastening screw, and the end part of the fastening screw is positioned in the slot of the clamping slot. According to the utility model, the hammer can be quickly clamped, the tail part of the hammer can be subjected to arc-shaped processing, the hammer can be installed or not installed, the manual operation is realized, and the practicability is strong.

Description

Technical Field

[0001] The utility model relates to the technical field of piano manufacturing and maintenance, in particular to a clamp for processing the arc-shaped inclined surface of a piano hammer. Background Art

[0002] The string structure of the modern piano has been changed from the original in-line type to the cross type, and the resulting change is that the piano hammers have also changed from the original in-line type to an inclined type in the same direction as the strings; in addition, when a certain amount of force is used to play and the keyboard is held, the piano hammers are captured by the back guard on the keyboard and cannot move. This is also the second escapement device of the double longitudinal escapement system of the modern piano. If the tail of the hammer is not captured, the hammer will shake up and down under the action of the integrative nature of the movement, resulting in an unstable playing feel and making many sounds. If the same note is to be played continuously for multiple times at one time, the performance cannot be controlled and realized. Therefore, the keyboard back guard needs to form a fit with the tail of the hammer, so that the hammer will be successfully "captured" by the back guard when falling back, then, the coordination of the inner bevel angle of the hammer and the outer bevel angle of the back guard is very important in terms of size; therefore, when manufacturing the piano or replacing new hammers, the tail of the hammer needs to be polished to fit the back guard so that it can be better "captured" by the back guard; the previous practice was to use manual methods, using a file to polish one by one to fit, or use two straight wooden strips, bundle the hammer handles into a row, and polish them one row with a grinder, or put the hammers on a sanding machine to polish them visually. Among the above methods, first, it is time-consuming and labor-intensive, and the uniformity of the curvature and plane size cannot be guaranteed, and the operation can only be performed after the hammer and the hammer handle are installed and combined; therefore, we propose a clamp that can quickly clamp the hammer and accurately grind the curvature of the tail, so as to achieve the accuracy, consistency and high efficiency of the hammer during piano manufacturing and maintenance, and it can be suitable for hammers of various sizes and various angles. This tool is highly practical. Utility Model Content

[0003] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0004] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0005] A fixture for processing the arc shape of the inclined surface of a hammer, comprising:

[0006] A mounting plate, a fixing plate is arranged on the top of the mounting plate, a horizontal card slot is opened in the middle of the upper surface of the mounting plate, a vertical circular through hole is opened in the middle of the top wall of the fixing plate and the bottom wall of the mounting plate, the card slot is connected with the through hole, and a horizontal long groove is opened in the middle of the bottom wall of the mounting plate just below the card slot and to the right, and the long groove is connected with the through hole;

[0007] The bottom plate, the mounting plate is detachably and rotatably arranged on the top wall of the bottom plate, and the metal shaft pin on the bottom plate is inserted into the slot hole of the long slot.

[0008] As a preferred solution of the clamp for processing the arc-shaped bevel of a hammer described in the utility model, the side wall of the fixing plate is threadedly provided with a longitudinal fastening screw, and the end of the fastening screw is located in the groove of the slot.

[0009] As a preferred solution of the clamp for processing the arc-shaped bevel of a hammer described in the utility model, a transverse long screw is screwed on the right side of the mounting plate, and the end of the long screw is located in the groove of the long groove.

[0010] As a preferred solution of the clamp for processing the arc-shaped bevel of a hammer described in the utility model, an inclined bevel groove is provided at the lower left corner of the fixing plate, and a horizontal adjusting screw is threadedly provided at the upper left corner of the fixing plate.

[0011] As a preferred solution of the clamp for processing the arc-shaped inclined surface of a hammer described in the utility model, a non-slip pad is arranged at the bottom of the base plate, and the non-slip pad is made of rubber material.

[0012] As a preferred solution of the fixture for processing the arc-shaped inclined surface of a hammer described in the utility model, anti-slip grooves are provided on the front and rear side walls of the fixing plate.

[0013] As a preferred solution of the fixture for processing the arc-shaped bevel of a hammer described in the utility model, a vertical regulating screw is arranged at the upper left corner of the mounting plate, and the bottom end of the regulating screw passes through the bottom of the mounting plate.

[0014] The beneficial effects of the utility model are: quick clamping of the hammers can be achieved, arc processing can be performed on the tails of the hammers, and both installed and uninstalled hammers can be used, manual operation can be achieved, and the practicability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the implementation of the utility model, the utility model will be described in detail below in combination with the drawings and detailed implementation. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the mounting plate and its connecting parts of the utility model;

[0018] Figure 3 For this utility model Figure 2 Schematic diagram of the structure looking upward.

[0019] Figure 4 It is a structural schematic diagram of the utility model when the metal shaft pin is located inside the long groove.

[0020] In the figure: a mounting plate 100 , a fixing plate 110 , a slot 120 , a through hole 130 , a fastening screw 140 , a long slot 150 , a long screw 160 , a beveled slot 170 , an adjusting screw 180 , an anti-slip slot 190 , a bottom plate 200 , and a metal shaft pin 210 . DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0023] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general scale, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0024] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0025] See also Figure 1-Figure 4, which shows a schematic diagram of the structure of a fixture for machining the arc-shaped inclined surface of a hammer according to the present invention, please refer to Figure 1-Figure 4 , a fixture for processing the arc shape of the bevel of a hammer is introduced in detail.

[0026] A fixture for processing the arc shape of the inclined surface of a piano hammer, comprising a mounting plate 100, a fixing plate 110 is arranged on the top of the mounting plate 100, a transverse card slot 120 is opened in the middle of the upper surface of the mounting plate 100, a vertical circular through hole 130 is opened in the middle of the top wall of the fixing plate 110 and the bottom wall of the mounting plate 100, the card slot 120 is connected to the through hole 130, and a transverse long groove 150 is opened in the middle of the bottom wall of the mounting plate 100, just below the card slot 120 and to the right, and the long groove 150 is connected to the through hole 130;

[0027] The bottom plate 200 and the mounting plate 100 are detachably and rotatably arranged on the top wall of the bottom plate 200 , and the metal shaft pin 210 on the bottom plate 200 is inserted into the slot hole of the long slot 150 .

[0028] Furthermore, a longitudinal tightening screw 140 is threadedly provided on the side wall of the fixing plate 110 , and the end of the tightening screw 140 is located in the groove of the clamping slot 120 , and the hammer is placed in the long groove 150 , and the hammer is clamped and fixed by the tightening screw 140 .

[0029] Furthermore, a transverse long screw 160 is screwed on the right side of the mounting plate 100, and the end of the long screw 160 is located in the groove of the long groove 150. The tail of the hammer can be ground into an arc shape by a grinding device. Before grinding, the end of the long screw 160 is first pressed against the metal shaft pin 210. At this time, the mounting plate 100 and the hammer can rotate around the metal shaft pin 210, thereby grinding the tail of the hammer into an arc shape, and the radius of the arc can be adjusted by the long screw 160 under the mounting plate 100.

[0030] Furthermore, an inclined bevel groove 170 is provided at the lower left corner of the fixing plate 110 , and a transverse adjusting screw 180 is threadedly provided at the upper left corner of the fixing plate 110 .

[0031] Furthermore, an anti-skid pad is provided at the bottom of the base plate 200. The anti-skid pad is made of rubber material to improve the stability of the base plate 200 when it is placed.

[0032] Furthermore, anti-slip grooves 190 are provided on the front and rear side walls of the fixing plate 110 to facilitate user holding.

[0033] Furthermore, a vertical adjusting screw 101 is provided at the upper left corner of the mounting plate 100, and the bottom end of the adjusting screw 101 passes through the bottom of the mounting plate 100. The inclination of the mounting plate 100 can be adjusted by adjusting the screw 101, and the mounting plate 100 can be adjusted to a horizontal position in combination with a level meter.

[0034] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A fixture for processing the arc shape of the inclined surface of a hammer, characterized in that: include: A mounting plate (100), wherein a fixing plate (110) is arranged on the top of the mounting plate (100), a transverse slot (120) is provided in the middle of the upper surface of the mounting plate (100), a vertical circular through hole (130) is provided in the middle of the top wall of the fixing plate (110) and the bottom wall of the mounting plate (100), the slot (120) is connected to the through hole (130), and a transverse long slot (150) is provided in the middle of the bottom wall of the mounting plate (100) and is located directly below the slot (120) and to the right, and the long slot (150) is connected to the through hole (130); The bottom plate (200) is provided with the mounting plate (100) detachably and rotatably disposed on the top wall of the bottom plate (200), and the metal shaft pin (210) on the bottom plate (200) is inserted into the slot hole of the long slot (150).

2. A fixture for processing the arc shape of the hammer bevel according to claim 1, characterized in that: A longitudinal fastening screw (140) is threadedly provided on the side wall of the fixing plate (110), and the end of the fastening screw (140) is located in the groove of the clamping groove (120).

3. A fixture for processing the arc shape of the hammer bevel according to claim 1, characterized in that: A transverse long screw (160) is threadedly provided on the right side of the mounting plate (100), and the end of the long screw (160) is located in the groove of the long groove (150).

4. A fixture for processing the arc shape of the hammer bevel according to claim 1, characterized in that: An inclined bevel groove (170) is provided at the lower left corner of the fixing plate (110), and a transverse adjustment screw (180) is threadedly provided at the upper left corner of the fixing plate (110).

5. A fixture for processing the arc shape of the hammer bevel according to claim 1, characterized in that: The bottom of the base plate (200) is provided with an anti-skid pad, and the anti-skid pad is made of rubber material.

6. A fixture for processing the arc shape of the hammer bevel according to claim 1, characterized in that: Anti-slip grooves (190) are provided on the front and rear side walls of the fixing plate (110).

7. A fixture for machining the arc shape of the hammer slope according to claim 1, characterized in that: A vertical adjusting screw (101) is provided at the upper left corner of the mounting plate (100), and the bottom end of the adjusting screw (101) passes through the bottom of the mounting plate (100).

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