Musical instrument part end surface processing device
By combining the swing arm, turntable, and slider mechanism, the precise machining of the tubular structure of the key of a wind instrument is achieved, solving the problems of low milling efficiency and depth control in the existing technology, and improving the stability and feel of the instrument parts machining.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JAVA MUSICAL INSTR (JIASHAN) CO LTD
- Filing Date
- 2025-05-20
- Publication Date
- 2026-07-14
AI Technical Summary
In the existing technology, the coordination between the tubular structure of the key and the hinge of the instrument body affects the playing feel, and the lack of precise correction of the length and inner wall of the tubular structure of the key results in low milling efficiency and inability to control the milling depth of the end face.
The mechanism employs a swing arm, turntable, and slider to convert rotary drive into linear movement. A replaceable abutment cone axially abuts the articulated tube against the drill bit cutting edge. Combined with eccentric transmission, the cutting depth of the articulated tube end face is controlled to achieve precise cutting.
It enables precise cutting of the end face of the hinged tube, improves milling efficiency, effectively fixes the tube, controls the cutting depth of the end face, and enhances the playing feel and processing stability.
Smart Images
Figure CN224488387U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of musical instrument processing technology, specifically relating to a device for processing the end face of musical instrument parts. Background Technology
[0002] On wind instruments, keys are fitted to the air holes to control the airflow and produce different timbres. These keys typically have tubular structures that connect to the instrument's body via hinges, and a rebound mechanism ensures that the keys return to the open air hole position after being released. The connection between the key tubular structure and the instrument's hinge directly affects the feel during playing; therefore, further modifications to the length and inner wall of the key tubular structure are necessary.
[0003] Patent CN216541070U discloses a safety device to prevent the free fall of the milling clamping body of a steel pipe end milling machine. This device newly installs an anti-fall mechanism on the steel pipe end milling machine. This mechanism consists of components such as piston cylinder B, push-pull plate, connecting seat, and support rod. A three-way two-position direct-acting solenoid valve is used to regulate high-pressure air to control the extension and retraction of piston rod B. Piston rod B drives two support rods to slide within the guide bushing through the connecting seat and push-pull plate. After the steel pipe end milling operation is completed, the drive support rod extends outward into the inner circle of the upper semi-circular clamping body, steadily supporting the upper semi-circular clamping body to prevent it from falling, which is safe and reliable. Therefore, it effectively avoids the phenomenon of the upper semi-circular clamping body falling due to accidental failure or human error, and ensures the safety of workers during maintenance operations.
[0004] In the above scheme, the upper and lower jaws clamp and fix the pipe in the circumferential direction, which can keep the pipe stable during milling. However, the milling cutter acts on the axial end face of the pipe, and there is no control device in the axial direction. This not only reduces the milling efficiency of the milling cutter on the end face, but also makes it impossible to control the milling depth on the end face. Utility Model Content
[0005] The purpose of this invention is to address the aforementioned problems by providing a device for processing the end face of musical instrument parts that can solve the above-mentioned technical issues.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A device for processing the end face of musical instrument parts includes a processing table. A stop component that moves linearly on a slide rail is provided on the processing table. The stop component is hinged to one end of a swing arm. The other end of the swing arm is eccentrically hinged to a transmission turntable. The center of the transmission turntable is rotatably connected to the processing table. A circumferentially rotating drill bit is provided along the slide rail direction. The tip of the drill bit points to the stop top of the stop component.
[0008] In the instrument part end face processing device, the abutting assembly includes a slider and an abutting support. The slider is slidably engaged on the slide rail and connected to the swing arm. The abutting support is detachably disposed in the positioning groove on the top of the slider.
[0009] In the instrument part end face processing device, the top of the abutment support is provided with an abutment cone whose tip points towards the drill bit, and the abutment cone and the drill bit are on the same axis.
[0010] In the instrument part end face processing device, several annular stepped surfaces of different diameters are formed on the conical surface of the abutting cone, and the annular stepped surfaces are parallel to the bottom surface of the abutting cone.
[0011] In the instrument part end face processing device, the positioning groove is in clearance fit with the two side walls of the slide rail and the two sides of the top support.
[0012] In the instrument part end face processing device, a limit fixing block is provided on the processing table near the drill bit. A limit screw is threaded through the limit fixing block, and the end face of the limit screw abuts against the side of the slider moving in the direction of movement.
[0013] In the instrument part end face processing device, the drill bit body is provided with an axial cutting edge, and the end face of the drill bit is provided with a positioning push rod at the axial position, the positioning push rod pointing to the top of the push assembly.
[0014] In the instrument part end face processing device, the drill bit is installed at the output end of the rotary motor, and the rotary motor is fixedly mounted on the processing table.
[0015] In the instrument part end face processing device, a transmission shaft is provided at the center of the transmission turntable and is rotatably connected to the processing table. The line connecting the center of the transmission turntable and the hinge point of the swing arm and the abutment component is parallel to the movement trajectory of the abutment component.
[0016] In the instrument part end face processing device, the drive shaft passes through the processing table on the lower side and is provided with a worm gear, which meshes with a worm that is rotatably disposed on the lower side of the processing table.
[0017] The advantages of this utility model are:
[0018] The rotary drive is converted into linear movement through the swing arm, turntable and slider mechanism. With the help of the replaceable abutment cone, the articulated tube body is axially abutted against the drill bit cutting edge, so as to achieve precise cutting of the end face of the articulated tube body. In addition, the eccentric transmission can reduce the reverse movement of the abutment component due to cutting stress. It can not only effectively fix the articulated tube body, but also control the cutting depth of the end face of the articulated tube body. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0020] Figure 2 This is a schematic diagram of the overall support component of this utility model.
[0021] Figure 3 This is a schematic diagram of the transmission structure of this utility model.
[0022] Figure 4 This is a schematic diagram of the worm gear structure of this utility model.
[0023] Figure 5 This is a schematic diagram of the drill bit structure of this utility model.
[0024] In the diagram, the components are: machining table 1, slide rail 11, limit fixing block 12, limit screw 13, abutment assembly 2, slider 21, abutment support 22, positioning groove 23, abutment cone 24, swing arm 31, transmission turntable 32, transmission shaft 33, worm gear 34, worm 35, drill bit 41, axial cutting edge 42, positioning ejector rod 43, and rotary motor 44. Detailed Implementation
[0025] The following are specific embodiments of the utility model, which are described in conjunction with the accompanying drawings to further illustrate the technical solution of the utility model. However, the utility model is not limited to these embodiments.
[0026] like Figures 1-5 As shown, the instrument part end face processing device includes a processing table 1, on which a stop component 2 is provided that moves linearly on a slide rail 11. The stop component 2 is hinged to one end of a swing arm 31, and the other end of the swing arm 31 is eccentrically hinged to a transmission turntable 32. The center of the transmission turntable 32 is rotatably connected to the processing table 1. A circumferentially rotating drill bit 41 is provided along the slide rail 11, and the tip of the drill bit 41 points to the stop top of the stop component 2.
[0027] That is, the rotary drive is converted into linear movement through the swing arm, turntable and slider mechanism. With the help of the replaceable abutment cone, the articulated tube body is axially abutted against the drill bit cutting edge, so as to achieve precise cutting of the end face of the articulated tube body. In addition, the eccentric transmission can reduce the situation where the abutment component moves in the opposite direction due to cutting stress. It can not only effectively fix the articulated tube body, but also control the cutting depth of the end face of the articulated tube body.
[0028] In this embodiment, the abutting component 2 includes a slider 21 and an abutting support 22. The slider 21 is slidably engaged on the slide rail 11 and connected to the swing arm 31. The abutting support 22 is detachably disposed in the positioning groove 23 on the top of the slider 21.
[0029] The bottom of the slider has a sliding rail with a through groove, and the inside is equipped with a dustproof ring and a lubrication groove. The top surface of the slider has a rectangular positioning groove for installing supports of different sizes. It is pushed by a swing arm during sliding. When installing the abutment support 22, push the abutment support 22 into the positioning groove and tighten the screw.
[0030] In this embodiment, the top of the abutment support 22 is provided with an abutment cone 24 whose tip points towards the drill bit 41, and the abutment cone 24 and the drill bit 41 are on the same axis.
[0031] One end of the hinge tube is fitted onto the tip of the abutting cone. The conical surface contacts the inner orifice and pushes the hinge tube against the drill bit through the conical surface. The conical surface can be adapted to various sizes of pipe diameter.
[0032] In this embodiment, several annular stepped surfaces of different diameters are formed on the conical surface of the abutting vertebra 24, and the annular stepped surfaces are parallel to the bottom surface of the abutting vertebra 24.
[0033] A ring-shaped stepped step is machined on the conical surface using a precision lathe. The diameter is determined by the inner diameter of the hinge tube, so that it can be adapted to various inner hole sizes. The stepped surface can be flat and abut against the end face of the hinge tube, improving the stability of the hinge tube under axial force.
[0034] In this embodiment, the positioning groove 23 is fitted with the two side walls of the slide rail 11 in the same direction and the two sides of the top support 22 with clearance.
[0035] The guide surfaces on both sides of the positioning groove at the top of the slider cooperate with the guide shoulders on the outer side of the support to ensure that there is no lateral wobbling after the support is inserted.
[0036] In this embodiment, a limiting block 12 is provided on the processing table 1 near the drill bit 41. A limiting screw 13 is threaded through the limiting block 12, and the end face of the limiting screw 13 abuts against the side of the slider 21 in the direction of movement.
[0037] The end face of the limiting screw 13 is aligned with the side of the slider 21 moving in the direction of movement. When the slider 21 contacts the limiting screw 13, the movement of the slider 21 is restricted, thus achieving the required cutting depth of the end face of the hinge tube.
[0038] The length of the rod extending beyond the limiting block is adjusted by rotating the limiting screw, thereby setting the maximum distance the slider can move towards the drill bit.
[0039] In this embodiment, the drill bit 41 has an axial cutting edge 42 on its body, and a positioning push rod 43 is provided on the end face of the drill bit 41 at the axial position, with the positioning push rod 43 pointing to the top of the abutment assembly 2.
[0040] One or more straight cutting edges are machined on the drill body using an end mill or grinder to face or chamfer the end face of the gear tube. The positioning push rod does not have a cutting edge and is mainly used to extend into the inner hole of the tube to provide axial support to the tube in conjunction with the push cone.
[0041] In this embodiment, the drill bit 41 is installed at the output end of the rotary motor 44, and the rotary motor 44 is fixedly mounted on the processing table 1.
[0042] The motor uses a brushless small electric spindle, which is bolted to the table base through a standard flange. The output end is equipped with a drill bit, and the speed regulation is stable to meet the cutting needs of different materials.
[0043] In this embodiment, a transmission shaft 33 is provided at the center of the transmission turntable 32 and is rotatably connected to the processing table 1. The line connecting the center of the transmission turntable 32 and the hinge point of the swing arm 31 and the abutment component 2 is parallel to the movement trajectory of the abutment component 2.
[0044] The unidirectional rotation of the transmission turntable can realize the reciprocating movement of the abutment component on the slide rail. When the center of the transmission turntable 32, the hinge point of the swing arm 31 and the abutment component 2 and the movement trajectory are collinear, the abutment component cannot push the transmission turntable to rotate in the opposite direction to achieve a self-locking state. Furthermore, at other angles, it can also reduce the efficiency of the abutment component 2 in pushing the transmission turntable to rotate and reduce the distance of the slider moving in the opposite direction during cutting.
[0045] In this embodiment, the drive shaft 33 passes through the machining table 1 on the lower side and is provided with a worm gear 34, which meshes with a worm 35 rotatably disposed on the lower side of the machining table 1.
[0046] The drive shaft is coaxially mounted with the worm gear below, and the worm gear is supported by a lower bracket. The worm is mounted on the base and driven by a handwheel or motor. When the worm stops driving, it can further prevent the drive turntable 32 from being driven in the opposite direction by the slider, making the hinge tube body more stable when being cut.
[0047] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.
Claims
1. A processing device for the end face of musical instrument parts, comprising a processing table (1), characterized in that, The processing table (1) is provided with a stop assembly (2) that moves linearly on the slide rail (11). The stop assembly (2) is hinged to one end of the swing arm (31), and the other end of the swing arm (31) is eccentrically hinged to the transmission turntable (32). The center of the transmission turntable (32) is rotatably connected to the processing table (1). A circumferentially rotating drill bit (41) is provided along the direction of the slide rail (11), and the tip of the drill bit (41) points to the stop top of the stop assembly (2).
2. The instrument part end face processing device according to claim 1, characterized in that, The abutment assembly (2) includes a slider (21) and an abutment support (22). The slider (21) is slidably engaged on the slide rail (11) and connected to the swing arm (31). The abutment support (22) is detachably disposed in the positioning groove (23) on the top of the slider (21).
3. The instrument part end face processing device according to claim 2, characterized in that, The top of the abutment support (22) is provided with an abutment cone (24) with its tip pointing towards the drill bit (41), and the abutment cone (24) and the drill bit (41) are on the same axis.
4. The instrument part end face processing device according to claim 3, characterized in that, The cone surface of the abutting vertebra (24) is provided with several annular stepped surfaces of different diameters, and the annular stepped surfaces are parallel to the bottom surface of the abutting vertebra (24).
5. The instrument part end face processing device according to claim 2, characterized in that, The positioning groove (23) is in clearance fit with the two side walls of the slide rail (11) and the two sides of the top support (22).
6. The instrument part end face processing device according to claim 2, characterized in that, A limiting block (12) is provided on the processing table (1) near the drill bit (41). A limiting screw (13) is threaded through the limiting block (12). The end face of the limiting screw (13) abuts against one side of the slider (21) in the direction of movement.
7. The instrument part end face processing device according to claim 1, characterized in that, The drill bit (41) has an axial cutting edge (42) on its body, and a positioning rod (43) is provided on the end face of the drill bit (41) at the axial position. The positioning rod (43) points to the top of the abutment assembly (2).
8. The instrument part end face processing device according to claim 7, characterized in that, The drill bit (41) is installed at the output end of the rotary motor (44), which is fixedly mounted on the processing table (1).
9. The instrument part end face processing device according to claim 1, characterized in that, A transmission shaft (33) is provided at the center of the transmission turntable (32) and is rotatably connected to the processing table (1). The line connecting the center of the transmission turntable (32) and the hinge point of the swing arm (31) and the abutment component (2) is parallel to the movement trajectory of the abutment component (2).
10. The instrument part end face processing device according to claim 9, characterized in that, The drive shaft (33) passes through the machining table (1) on the lower side and is provided with a worm gear (34), which meshes with a worm (35) rotatably disposed on the lower side of the machining table (1).