Needle threading equipment for triangular string hammer handle shaft bracket

Abstract

The utility model discloses needle threading equipment for a triangular string mallet handle shaft bracket (hereinafter referred to as shaft bracket). The needle threading equipment comprises a workbench, a feeding mechanism and a needle threading mechanism. The feeding mechanism comprises a first rail, a discharging frame and a pushing device. The first rail is arranged on the workbench, the discharging frame is arranged above the first rail, and the pushing device is arranged at one end of the first rail; the needle threading mechanism comprises a needle threading tool, a needle supply device, a needle punching device, a through hole device and a limiting device; the input end of the needle threading tool is connected with the output end of the first track, the needle supply device is connected with the needle threading tool, the needle threading tool is provided with a needle threading channel penetrating through the two sides of the needle threading tool, and the needle punching device and the through hole device are oppositely arranged on the two sides of the needle threading tool and are aligned to the needle threading channel. And the limiting device is arranged above the needle threading tool.

Description

Technical Field

[0001] The utility model relates to the technical field of piano manufacturing and processing, in particular to a needle threading device for a hammer handle shaft frame of a grand piano. Background Art

[0002] like Figure 1 The figure shows a shaft bracket for the handle of a grand piano hammer. A pinhole is provided at the head end of the shaft bracket for installing the shaft pin. Nylon (called shaft lining nylon) adapted to the pinhole is provided in the pinhole to facilitate the connection between the shaft pin and the shaft bracket.

[0003] In order to improve the durability of the shaft lining, it needs to be soaked in emulsion and then dried before installing the bearing. However, during this process, the shaft lining will expand, which will affect the later installation of the bearing. Therefore, a needle needs to be inserted into the pinhole in advance to limit the expansion of the shaft lining, and the needle can be removed after drying.

[0004] In the past, needle threading on the shaft frame was generally done manually, which not only increased labor input but also made it difficult to improve production efficiency. Summary of the Invention

[0005] In order to overcome the above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a needle threading device for a grand piano hammer shank shaft frame, so as to realize the automation of needle threading, reduce the labor input and improve the production efficiency.

[0006] The first technical solution of the present utility model is as follows:

[0007] A needle threading device for a grand piano hammer shank shaft frame, comprising:

[0008] Workbench;

[0009] The feeding mechanism includes: a first track, a discharge rack, and a pushing device; the first track is arranged on the workbench, the discharge rack is arranged above the first track, and the pushing device is arranged at one end of the first track;

[0010] The needle threading mechanism includes: a needle threading tool, a needle supply device, an injection device, a through-hole device, and a limiting device; the input end of the needle threading tool is connected to the output end of the first track, the needle supply device is connected to the needle threading tool, and the needle threading tool is provided with a needle threading channel running through both sides thereof, the injection device and the through-hole device are relatively arranged on both sides of the needle threading tool, and the limiting device is arranged above the needle threading tool.

[0011] Furthermore, the discharge rack includes an inclined section and a bending section, one end of the bending section is connected to the inclined section, and the other end of the bending section faces the first track from directly above, the transmission path of the inclined section is a straight line, and the transmission path of the bending section is an arc.

[0012] Furthermore, the inclined section includes two first limit bars and a connecting plate, the two first limit bars are opposite and spaced apart, and the first limit bar has a groove; the two ends of the connecting plate are respectively connected to a corresponding first limit bar, and the multiple connecting plates are spaced apart along the path of the axis frame sliding down.

[0013] Furthermore, the first limiting strip includes a guide strip and a limiting plate, the guide strip is L-shaped, and includes a first supporting surface and a first axial limiting surface vertically connected, the limiting plate and the first supporting surface are parallel and spaced apart, and the limiting plate is connected to the first axial limiting surface.

[0014] Furthermore, the guide bar is extended relative to the limiting piece at the position of the input end of the inclined section, and the extended portion forms an input port.

[0015] Furthermore, the pushing device includes a first cylinder and a pushing block, the driving direction of the first cylinder is parallel to the path of the first track, and the pushing block is slidably arranged on the first track and is drivingly connected to the first cylinder.

[0016] Furthermore, the needle threading tool includes a second track and a needle threading seat, the input end of the second track is connected to the output end of the first track, the needle threading seat is connected to the second track and is located close to the injection device. The needle threading channel passes through the second track and the needle threading seat, and the needle supply device is connected to the needle threading seat.

[0017] Furthermore, the needle supply device includes a vibrating disk and a descending track, the output end of the vibrating disk is located above the needle threading seat, and the descending track connects the vibrating disk and the needle threading seat; there is a transmission channel in the descending track, and the transmission channel is connected to the needle threading channel.

[0018] Furthermore, the path of the transmission channel is a zigzag downward path.

[0019] Furthermore, the limiting device includes a limiting plate, a fourth cylinder and a pressure block, the limiting plate is fixed on the top surface of the second rail and is located on the side close to the input end of the second rail, the fourth cylinder is arranged above the second rail, and the pressure block is arranged at the output end of the fourth cylinder.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The shaft racks are output one by one from the feeding mechanism, and the needles are driven into the needle holes of the shaft racks by the needle threading mechanism to complete the needle threading work, thereby realizing the automation of the needle threading, reducing the labor input and improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0023] Figure 1 It is a perspective view of the shaft frame in the background art;

[0024] Figure 2 It is a top view of the needle threading device in the present utility model;

[0025] Figure 3 It is a three-dimensional diagram of the needle threading device in the present utility model;

[0026] Figure 4 This is a three-dimensional diagram of the needle threading device in the utility model from another perspective (excluding the material rack);

[0027] Figure 5 It is a three-dimensional diagram of the material discharging rack in the utility model;

[0028] Figure 6 It is a cross-sectional view of the lower slide track and the needle threading seat in the utility model;

[0029] Figure 7 It is a partial schematic diagram of the limiting device in the utility model;

[0030] Description of Figure Numbers:

[0031] 1- Workbench;

[0032] 21-first track; 22-discharging rack; 2201-input port; 221-inclined section; 2211-guide bar; 2212-limiting piece; 2213-connecting plate; 222-bending section; 23-pushing device; 231-first cylinder; 232-pushing block;

[0033] 31-needle threading tool; 301-needle threading channel; 311-second track; 312-needle threading seat; 32-needle feeding device; 321-vibrating plate; 322-sliding track; 302-transmission channel; 33-injection device; 331-second cylinder; 332-push rod; 34-through hole device; 341-third cylinder; 342-motor; 343-cone head; 35-limiting device; 351-fourth cylinder; 352-pressing block; 353-limiting plate; 354-elastic extrusion member;

[0034] 6-shaft frame; 61-shaft lining;

[0035] 7-Needle. DETAILED DESCRIPTION

[0036] To facilitate a better understanding of the purpose, structure, features, and efficacy of the present invention, the present invention is further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that the features shown in the drawings are not necessarily drawn to scale. In addition, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the usual meanings understood by people with ordinary skills in the field to which this disclosure belongs. The "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Connected" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right", "front", "back" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly. In addition, in the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0038] like Figure 2-7 As shown, this embodiment provides a needle threading device for a grand piano hammer handle shaft frame 6 (hereinafter referred to as: shaft frame 6), including: a workbench 1, a feeding mechanism and a needle threading mechanism arranged on the workbench 1; the shaft frames 6 are output one by one from the feeding mechanism, and the needle head 7 is driven into the needle hole of the shaft frame 6 through the needle threading mechanism to complete the needle threading work.

[0039] like Figure 2-3As shown, the feeding mechanism includes: a first track 21, a discharge rack 22, and a pushing device 23; the first track 21 is arranged on the workbench 1, the discharge rack 22 is arranged above the first track 21, and the pushing device 23 is arranged at one end of the first track 21; the shaft racks 6 are arranged in the discharge rack 22, and under the action of gravity, the shaft racks 6 fall one by one from the discharge rack 22 onto the first track 21, and the pushing device 23 is used to push the shaft racks 6 that fall into the first track 21 forward.

[0040] Conventional discharge racks 22 generally adopt a vertical structure (that is, materials are stacked up and down and fall vertically), but this structure is prone to material tilting and resulting in material jamming, which can cause equipment failure and shutdown, especially for long strips of materials with irregular shapes such as the shaft rack 6; in addition, when workers discharge materials into the vertical structure, they need to discharge materials at the highest point of the discharge rack 22. If the entrance end of the discharge rack 22 is set higher, it will cause inconvenience to the workers' operation. If the entrance end of the discharge rack 22 is set lower, the capacity will be reduced.

[0041] Therefore, if Figure 5 As shown, as a preferred solution, the discharge rack 22 is designed as a curved bridge structure, which includes an inclined section 221 and a bent section 222. One end of the bent section 222 is connected to the inclined section 221, and the other end faces the first track 21 from directly above. The transmission path of the inclined section 221 is a straight line, and the transmission path of the bent section 222 is an arc. The input end of the bent section 222 is tangent to the output end of the inclined section 221, and the output end of the bent section 222 is perpendicular to the first track 21. The shaft rack 6 slides on the inclined section 221 and falls vertically onto the first track 21 after passing through the bent section 222.

[0042] In this way, the shaft frame 6 will receive a supporting force during the sliding process to alleviate the speed difference at both ends of the shaft frame 6 when it slides down and causes it to tilt, so that the axis of the shaft frame 6 remains horizontal during the falling process, reducing the occurrence of material jamming; in addition, this structure reduces the height of the inlet end of the discharge rack 22, that is, under the same loading capacity, the inlet height of the discharge rack 22 is lower, which makes it easier for workers to put in the shaft frame 6, thereby improving the convenience of discharge of materials on the discharge rack.

[0043] In this embodiment, the curvature of the bending section 222 is 160 degrees.

[0044] like Figure 5As shown, further, the inclined section 221 includes two first limit bars and a connecting plate 2213, the two first limit bars are opposite and spaced apart, the first limit bar has a groove, and the two grooves limit one end of the shaft frame 6 respectively to form a path for the shaft frame 6 to slide down; the two ends of the connecting plate 2213 are respectively connected to a corresponding first limit bar, and multiple connecting plates 2213 are spaced apart along the path for the shaft frame 6 to slide down. The connecting plate 2213 connects and fixes the two first limit bars while exposing the middle part of the shaft frame 6, which is conducive to observing the arrangement and falling of the shaft frame 6, and also convenient for performing some basic operations on the shaft frame 6 in the discharge rack 22, such as pushing the shaft frame 6 out of the discharge rack 22 or adjusting the arrangement state when clamping the material.

[0045] like Figure 5 As shown, specifically, the first limiting strip includes a guide strip 2211 and a limiting plate 2212, the guide strip 2211 is L-shaped, and includes a first supporting surface and a first axial limiting surface vertically connected, the limiting plate 2212 and the first supporting surface are parallel and spaced apart, and the limiting plate 2212 is connected to the first axial limiting surface, thereby forming the groove.

[0046] like Figure 5 As shown above, the structure of the bending section 222 is substantially the same as that of the inclined section 221 , with the difference being that the path of the inclined section 221 is a straight line, while the path of the bending section 222 is an arc.

[0047] The slot at the input end of the general discharge rack 22 is small and can only accommodate the shaft rack 6. The operation of placing the shaft rack 6 into the discharge rack 22 is relatively troublesome and requires the shaft racks 6 to be placed one by one, which makes it difficult to perform large-scale operations. Figure 5 As shown, further, an input port 2201 is formed at the input end of the first limit bar, and the cross-section of the input port 2201 is L-shaped; specifically, the length of the guide bar 2211 is greater than the length of the limit plate 2212, and the limit plate 2212 and the guide bar 2211 are aligned close to one end of the bending section 222, so that the guide bar 2211 extends relative to the limit plate 2212 at the input end of the inclined section 221, and the extended part forms the input port 2201; in this way, workers can pick up multiple shaft racks 6 at a time and place them on the input port 2201 first, and the shaft rack 6 slides into the groove along the first supporting surface, which can eliminate the difficulty of aligning the shaft rack 6 with the groove when placing it, and multiple shaft racks 6 can be placed at one time, thereby improving the convenience and efficiency of material discharge.

[0048] like Figure 3-4As shown, further, the pushing device 23 includes a first cylinder 231 and a pushing block 232. The driving direction of the first cylinder 231 is parallel to the path of the first track 21. The pushing block 232 is slidably set on the first track 21 and is driven and connected to the first cylinder 231. When a shaft frame 6 falls onto the first track 21, the pushing block 232 pushes the shaft frame 6 forward from the tail end. After the pushing block 232 is reset, the next shaft frame 6 falls onto the first track 21 again, and the pushing block 232 continues to push the shaft frame 6 forward. On the first track 21, under the push of the pushing device 23, the rear shaft frame 6 pushes the front shaft frame 6 forward, thereby realizing the transportation of materials.

[0049] like Figure 2-3 As shown, the needle threading mechanism includes: a needle threading tool 31, a needle feeding device 32, an injection device 33, a through-hole device 34, and a limit device 35; the input end of the needle threading tool 31 is connected to the output end of the first track 21, the needle feeding device 32 is connected to the needle threading tool 31, the needle threading tool 31 is provided with a needle threading channel 301 running through both sides thereof, the injection device 33 and the through-hole device 34 are arranged on both sides of the needle threading tool 31 relative to each other and aligned with the needle threading channel 301, and the limit device 35 is arranged above the needle threading tool 31;

[0050] Specifically, the length of each shaft frame 6 is the same, the pushing stroke of the pushing device 23 is fixed, and the position of each shaft frame 6 entering the needle threading tool 31 is also fixed. Based on this, the needle threading channel 301 is opened, and the needle hole of the shaft frame 6 after entering the needle threading tool 31 and the needle threading channel 301 are on the same axis. The needle supply device 32 inputs the needle head 7 into the needle hole of the needle threading tool 31 one by one, and the limiting device 35 is used to press the shaft frame 6 onto the needle threading tool 31, and the through-hole device 34 is used to clear the blockage in the needle hole of the shaft frame 6; the injection device 33 is used to inject the needle head 7 on the needle threading channel 301 into the needle hole of the shaft frame 6.

[0051] like Figure 3 、 4 , 6, further, the needle threading tool 31 includes a second track 311 and a needle threading seat 312, the input end of the second track 311 is connected to the output end of the first track 21, the needle threading seat 312 is connected to the second track 311, and is located on the side close to the injection device 33, the needle threading channel 301 passes through the second track 311 and the needle threading seat 312, the needle supply device 32 is connected to the needle threading seat 312; the needle supply device 32 inputs the needles 7 one by one into the needle threading channel 301 located in the needle threading seat 312.

[0052] like Figure 3 、 4 , 6, further, the needle supply device 32 includes a vibration disk 321 and a descending track 322, the output end of the vibration disk 321 is located above the needle threading seat 312, and the descending track 322 connects the vibration disk 321 and the needle threading seat 312; the descending track 322 has a transmission channel 302, the transmission channel 302 is connected to the needle threading channel 301, the transmission channel 302 is tilted, and the extension direction of the transmission channel 302 is perpendicular to the axis of the needle 7, and the needle 7 slides along the transmission channel 302 to the needle threading channel 301.

[0053] like Figure 6 As shown, preferably, the path of the transmission channel 302 is a zigzag downward path. In this way, the transmission channel 302 is divided into multiple levels, so that the needle 7 slides down step by step to buffer the descending speed of the needle 7 and prevent the needle 7 from axially tilting and getting stuck.

[0054] like Figure 2-4 As shown, further, the injection device 33 includes a second cylinder 331 and a push rod 332; the push rod 332 is arranged at the output end of the second cylinder 331, and the diameter of the push rod 332 is adapted to the inner diameter of the needle threading channel 301. The second cylinder 331 drives the push rod 332 to slide in the needle threading channel 301 to push the needle 7 into the needle hole of the shaft frame 6.

[0055] like Figure 2-4 As shown, further, the through-hole device 34 includes a third cylinder 341, a motor 342 and a cone head 343, the motor 342 is arranged on the workbench 1, the motor 342 is slidably arranged on the workbench 1, and the motor 342 is connected to the output end of the third cylinder 341, and the cone head 343 is arranged at the output end of the motor 342; the third cylinder 341 drives the cone head 343 to pass through the needle transmission channel 301 and penetrate into the needle hole of the shaft frame 6, and the motor 342 drives the cone head 343 to rotate in the needle hole of the shaft frame 6 to clear the blockage in the needle hole.

[0056] like Figure 2 、 3, 7, further, the limiting device 35 includes a limiting plate 353, a fourth cylinder 351 and a pressure block 352, the limiting plate 353 is fixed to the top surface of the second track 311 and is located on the side close to the input end of the second track 311, the fourth cylinder 351 is arranged above the second track 311, and its output direction is vertically downward, the pressure block 352 is arranged at the output end of the fourth cylinder 351, and is located above the head end of the shaft frame 6, the bottom end of the pressure block 352 is convex to adapt to the shape of the head end of the shaft frame 6, the pressure block 352 is provided with a through groove for the needle 7 to pass through; through the cooperation of the pressure block 352 and the limiting plate 353, the two ends of the shaft frame 6 are pressed down and positioned.

[0057] like Figure 2 、 3 As shown in Figure 7, preferably, the limiting device 35 also includes an elastic extrusion member 354, which is arranged on the second rail 311. The elastic extrusion member 354 is used to extrude the shaft frame 6 from the horizontal side to limit the horizontal offset of the shaft frame 6; specifically, the elastic extrusion member 354 includes a spring and a push block, and the push block can be horizontally slidably arranged on the second rail 311, and its sliding direction is horizontal and perpendicular to the axis of the shaft frame 6, and the spring is arranged on the push block and the second rail 311.

[0058] In this embodiment, the output end of the second track 311 is connected to a conveyor belt, and the shaft frame 6 that has completed the injection enters the transmission belt under the push of the rear shaft frame 6, and enters the next process under the drive of the conveyor belt.

[0059] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A needle threading device for a grand piano hammer shank shaft frame, characterized in that: include: Workbench (1); The feeding mechanism comprises: a first track (21), a discharge rack (22), and a pushing device (23); the first track (21) is arranged on the workbench (1), the discharge rack (22) is arranged above the first track (21), and the pushing device (23) is arranged at one end of the first track (21); The needle threading mechanism comprises: a needle threading tool (31), a needle supply device (32), an injection device (33), a through-hole device (34), and a limit device (35); the input end of the needle threading tool (31) is connected to the output end of the first track (21), the needle supply device (32) is connected to the needle threading tool (31), the needle threading tool (31) is provided with a needle threading channel (301) running through both sides thereof, the injection device (33) and the through-hole device (34) are relatively arranged on both sides of the needle threading tool (31), and the limit device (35) is arranged above the needle threading tool (31).

2. The needle threading device for a grand piano hammer shank according to claim 1, characterized in that: The discharge rack (22) comprises an inclined section (221) and a bent section (222), one end of the bent section (222) is connected to the inclined section (221), and the other end of the bent section (222) faces the first track (21) from directly above, the transmission path of the inclined section (221) is a straight line, and the transmission path of the bent section (222) is an arc.

3. The needle threading device for a grand piano hammer shank according to claim 2, characterized in that: The inclined section (221) comprises two first limiting bars and a connecting plate (2213), wherein the two first limiting bars are arranged opposite to each other and at intervals, and the first limiting bar has a groove; the two ends of the connecting plate (2213) are respectively connected to a corresponding first limiting bar, and the plurality of connecting plates (2213) are arranged at intervals along the path along which the shaft frame (6) slides downward.

4. The needle threading device for a grand piano hammer shank according to claim 3, characterized in that: The first limiting strip comprises a guide strip (2211) and a limiting plate (2212); the guide strip (2211) is L-shaped and comprises a first supporting surface and a first axial limiting surface vertically connected; the limiting plate (2212) and the first supporting surface are parallel and spaced apart, and the limiting plate (2212) is connected to the first axial limiting surface.

5. The needle threading device for a grand piano hammer shank according to claim 4, characterized in that: The guide bar (2211) is extended relative to the limiting piece (2212) at the input end of the inclined section (221), and the extended portion forms the input port (2201).

6. The needle threading device for a grand piano hammer shank according to claim 1, characterized in that: The pushing device (23) includes a first cylinder (231) and a pushing block (232), wherein the driving direction of the first cylinder (231) is parallel to the path of the first track (21), and the pushing block (232) is slidably arranged on the first track (21) and is drivingly connected to the first cylinder (231).

7. The needle threading device for a grand piano hammer shank according to claim 1, characterized in that: The needle threading tool (31) includes a second track (311) and a needle threading seat (312), the input end of the second track (311) is connected to the output end of the first track (21), the needle threading seat (312) is connected to the second track (311), and is located on a side close to the injection device (33), the needle threading channel (301) passes through the second track (311) and the needle threading seat (312), and the needle supply device (32) is connected to the needle threading seat (312).

8. The needle threading device for a grand piano hammer shank according to claim 7, characterized in that: The needle supply device (32) comprises a vibration disk (321) and a descending track (322), wherein the output end of the vibration disk (321) is located above the needle threading seat (312), and the descending track (322) connects the vibration disk (321) and the needle threading seat (312); a transmission channel (302) is provided in the descending track (322), and the transmission channel (302) is connected to the needle threading channel (301).

9. The needle threading device for a grand piano hammer shank according to claim 8, characterized in that: The path of the transmission channel (302) is a zigzag downward path.

10. The needle threading device for a grand piano hammer shank according to claim 7, characterized in that: The limiting device (35) comprises a limiting plate (353), a fourth cylinder (351) and a pressing block (352); the limiting plate (353) is fixed on the top surface of the second track (311) and is located close to the input end of the second track (311); the fourth cylinder (351) is arranged above the second track (311); and the pressing block (352) is arranged at the output end of the fourth cylinder (351).

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