High-efficiency polishing device for hand sewing needle production

Abstract

The utility model relates to display production technical field discloses a kind of efficient polishing device for hand sewing needle production, including multiple support columns and support table, the top front end of support table is provided with blanking mechanism, the bottom end inside of support table is provided with polishing mechanism, the polishing mechanism includes motor, the bottom end inside of support table is fixedly connected in the outside of motor, the inside rotationally connected of support table has two driving shafts, the inside slidingly connected of driving shaft has sliding assembly, the outside of two sliding assemblies is slidably connected with fixed block, the proximal end of two fixed blocks is fixedly connected with whetstone. In the utility model, the fixation of whetstone is completed, the whole process is easy to operate, the whetstone replacement efficiency is improved by quick dismounting structure, so as to improve the polishing precision of whetstone, and improve the finished product qualification rate.

Description

Technical Field

[0001] This utility model relates to the field of display manufacturing technology, and in particular to a high-efficiency polishing device for the production of hand sewing needles. Background Technology

[0002] The production of hand sewing needles involves multiple processes, with polishing being a crucial step. Early hand sewing needle polishing processes were relatively simple, such as using manual labor or simple machinery to drive polishing stones. With technological advancements, the quality requirements for needles have become increasingly stringent, necessitating more precise and efficient polishing processes to ensure a smooth needle surface, sharp needle tip, and accurate dimensions to meet various needs in the sewing process. As the economy develops and the textile and garment industries grow, the demand for hand sewing needles continues to increase, prompting companies to research and adopt more advanced hand sewing needle production polishing equipment.

[0003] The polishing device for sewing machine needle production first feeds the hand sewing needle blank to be sharpened into the processing station of the sharpening machine through the feeding mechanism. The hand sewing needle is positioned manually or by a baffle. Then, the needle blank is clamped by a pneumatic gripper and other fixing mechanism to prevent displacement during sharpening. Next, the main motor drives the grinding wheel, diamond grinding wheel and other sharpening components to rotate at high speed. At the same time, the feeding mechanism pushes the needle frame slowly closer to the sharpening components. The micro-cutting action of the abrasive particles is used to remove excess metal from the tip of the needle blank. The sharpened needle blank is then output through the feeding channel.

[0004] In existing technologies, some high-efficiency grinding devices for hand sewing needle production have a fixed structure design for the grinding mold. The connection between the grinding mold and the main body of the device is made through multiple sets of bolts or welded rigid connectors. This means that the grinding mold needs to be replaced along with related components, which is a cumbersome process and makes the grinding mold replacement time-consuming. This seriously affects the continuity of hand sewing needle production. Therefore, a high-efficiency grinding device for hand sewing needle production is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a high-efficiency grinding device for hand sewing needle production. It aims to improve the problem that some existing high-efficiency grinding devices for hand sewing needle production have a serious impact on the production efficiency of hand sewing needles because the grinding mold and the main body are rigidly connected by bolts or welding. This results in the need to disassemble related parts simultaneously when replacing the grinding mold.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A high-efficiency grinding device for hand sewing needle production includes multiple support columns and a support platform. A feeding mechanism is located at the top front end of the support platform, and a grinding mechanism is located inside the bottom end of the support platform. The grinding mechanism includes a motor, which is externally and fixedly connected to the inside of the bottom end of the support platform. Two drive shafts are rotatably connected inside the support platform, and sliding components are slidably connected inside the drive shafts. Fixed blocks are slidably connected to the outside of each of the two sliding components, and a whetstone is fixedly connected to the adjacent ends of the two fixed blocks. Two rotating rods are rotatably connected inside the sliding components, and limit rods are rotatably connected to the distant ends of the two rotating rods. Support springs are fixedly connected to the adjacent sides of the two rotating rods. A sliding rod is fixedly connected to the outside of the sliding components. A limit shaft is slidably connected inside the drive shaft, and a return spring is fixedly connected inside the drive shaft.

[0008] As a further description of the above technical solution:

[0009] The feeding mechanism includes two fixed plates. The bottom of the two fixed plates is fixedly connected to the top of the support platform. A feeding frame is fixedly connected to an adjacent side of the two fixed plates. A support block is fixedly connected to the top of the fixed plates. A cylinder is fixedly connected inside the support block. A drive plate is fixedly connected to the drive end of the cylinder. Two rotating plates are rotatably connected inside the drive plate. Support frames are fixedly connected inside both the left and right ends of the feeding frame. A connecting shaft is rotatably connected inside the two rotating plates. A sliding plate is rotatably connected to the outside of the connecting shaft. A rotating roller is rotatably connected inside the feeding frame. Limit grooves are formed inside both support frames.

[0010] As a further description of the above technical solution:

[0011] Both of the sliding components include a sliding shaft, and the exterior of the two sliding shafts are slidably connected to the interior of the two driving shafts, and a sliding block is rotatably connected to the adjacent end of each of the two sliding shafts;

[0012] As a further description of the above technical solution:

[0013] A controller is fixedly connected to the top right end of the support platform. A drive mechanism is provided at the rear end of the controller. The drive mechanism includes a driver. The bottom of the driver is fixedly connected to the top of the support platform. Two support plates are fixedly connected to the top of the support platform. Rotating rollers are rotatably connected inside the two support plates. Two rotating disks are fixedly connected to the outside of the rotating rollers. A limit block is fixedly connected to the top of the support platform. A discharge frame is fixedly connected to the rear end of the top of the support platform.

[0014] As a further description of the above technical solution:

[0015] The exterior of the two sliding blocks is slidably connected to the interior of one of the two adjacent ends of the two drive shafts, and the exterior of the two sliding blocks is slidably connected to the interior of the two fixed blocks.

[0016] As a further description of the above technical solution:

[0017] The exterior of the plurality of limiting rods is slidably connected to the interior of the two fixed blocks, and the exterior of the two sliding rods is slidably connected to the interior of the two drive shafts;

[0018] As a further description of the above technical solution:

[0019] The two limiting shafts are slidably connected at their proximal ends to the two sliding rods at their distal ends, and the two reset springs are fixedly connected at their proximal ends to the two limiting shafts.

[0020] As a further description of the above technical solution:

[0021] The sliding plate is externally slidably connected to the inside of the feed frame, and the left and right ends of the connecting shaft are respectively slidably connected to the inside of the two support frames.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, by manually rotating and sliding the sliding rod, the sliding block drives the limiting rod to rotate, thereby quickly releasing the fixed relationship between the drive shaft and the fixed block, completing the disassembly of the whetstone. By pushing the whetstone, the sliding rod drives the sliding shaft to push the sliding block to slide, thereby causing the rotating rod to drive the limiting rod to rotate. The support spring releases the elastic force, allowing the limiting rod to embed into the interior of the fixed block, thus completing the fixation of the whetstone. The whole process is simple to operate, and the quick disassembly structure improves the efficiency of whetstone replacement, thereby improving the grinding accuracy of the whetstone and increasing the finished product qualification rate.

[0024] 2. In this utility model, the drive plate is moved by the cylinder, which in turn drives the rotating plate to rotate, and then drives the sliding plate to slide inside the feed frame. By adjusting the gap between the sliding plate and the bottom of the feed frame, the gap is widened when the sliding plate slides upward to ensure that the material falls smoothly, and the gap is narrowed when it slides downward to control the amount of material falling. This accurately matches the feeding speed of the hand sewing needle with the grinding speed, and avoids the feed frame from being blocked due to excessive feeding. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of a high-efficiency grinding device for the production of hand sewing needles proposed in this utility model.

[0026] Figure 2This is a schematic diagram of the rotating plate of a high-efficiency grinding device for hand sewing needle production proposed in this utility model.

[0027] Figure 3 This is a schematic diagram of the structure of the fixing block of a high-efficiency grinding device for hand sewing needle production proposed in this utility model;

[0028] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0029] Legend:

[0030] 1. Support column; 2. Support platform; 3. Controller; 4. Drive mechanism; 41. Driver; 42. Support plate; 43. Rotating roller; 44. Rotating disk; 45. Limiting block; 5. Feeding mechanism; 51. Fixing plate; 52. Feeding frame; 53. Supporting block; 54. Cylinder; 55. Drive plate; 56. Rotating plate; 57. Support frame; 58. Connecting shaft; 59. Sliding plate; 510. Rotating roller; 511. Limiting groove; 6. Grinding mechanism; 61. Motor; 62. Drive shaft; 63. Sliding assembly; 631. Sliding shaft; 632. Sliding block; 64. Fixing block; 65. Sharpening stone; 66. Rotating rod; 67. Limiting rod; 68. Support spring; 69. Sliding rod; 610. Limiting shaft; 611. Return spring; 7. Discharge frame. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figure 1 , Figure 3 and Figure 4This utility model provides an embodiment of a high-efficiency grinding device for hand sewing needle production, comprising multiple support columns 1 and support platforms 2. The support columns 1 and support platforms 2 provide stable support for the entire device during operation, preventing shaking. A controller 3 is fixedly connected to the top right end of the support platform 2. The controller 3 receives and processes signals to achieve automated control of the device. A drive mechanism 4 is provided at the rear end of the controller 3. The drive mechanism 4 is responsible for moving the hand sewing needle to be ground, realizing continuous grinding operation. The drive mechanism 4 includes a driver 41. The bottom of the driver 41 is fixedly connected to the top of the support platform 2. The driver 41 provides a power source, and the support platform 2 provides stable mounting for the driver 41 to prevent shaking during operation. Two support plates 42 are fixedly connected to the top of the support platform 2. A rotating roller 43 is rotatably connected inside the two support plates 42. The support plates 42 support and limit the rotation of the rotating roller 43, providing stable support for the rotation of the rotating roller 43 and preventing the rotating roller 43 from deviating during rotation. Two rotating disks 44 are fixedly connected to the outside of the rotating rod 43. The rotation of the rotating rod 43 drives the rotating disks 44 to rotate, which is used to move the hand sewing needle.

[0033] A limiting block 45 is fixedly connected to the top of the support platform 2. The limiting block 45 is used to limit the movement of the hand sewing needle and prevent it from deviating. A feeding mechanism 5 is provided at the front end of the top of the support platform 2. The feeding mechanism 5 is used to orderly transport the hand sewing needle to be polished to the polishing position. A polishing mechanism 6 is provided inside the bottom end of the support platform 2. The polishing mechanism 6 is used to polish the hand sewing needle. The polishing mechanism 6 includes a motor 61. The motor 61 is externally fixedly connected to the inside of the bottom end of the support platform 2. The motor 61 is used to provide driving force. The support platform 2 provides fixation for the operation of the motor 61 to prevent the motor 61 from shaking during operation. Two drive shafts 62 are rotatably connected inside the support platform 2. The drive shafts 62 rotate under the drive of the motor 61 to provide power transmission for the polishing action. A sliding component 63 is slidably connected inside the drive shafts 62. The drive shafts 62 provide sliding guidance for the sliding component 63 to prevent the drive shafts 62 from deviating during sliding and improve the sliding stability of the drive shafts 62. Both sliding components 63 include a sliding shaft 631. The two sliding shafts 631 are slidably connected to the inside of the two drive shafts 62. The drive shafts 62 provide a limit for the sliding of the sliding shafts 631 to prevent the sliding shafts 631 from deviating during the sliding process, thereby ensuring the stable sliding of the sliding shafts 631.

[0034] Each of the two sliding shafts 631 has a sliding block 632 rotatably connected to one of its adjacent ends. The sliding shafts 631 slide synchronously as they slide. The two sliding blocks 632 are slidably connected to the interior of one of their adjacent ends on the two drive shafts 62. The drive shafts 62 guide the sliding blocks 632, preventing them from deviating during sliding and ensuring stable sliding. Each of the two sliding components 63 has a fixed block 64 slidably connected to its exterior. The two sliding blocks 632 are slidably connected to the interior of the two fixed blocks 64. The fixed blocks 64 guide the sliding blocks 632, preventing them from deviating during sliding and improving their sliding stability. A whetstone 65 is fixedly connected to one of the adjacent ends of the two fixed blocks 64 by welding. The whetstone 65 supports the two fixed blocks 64 and is fixed to them by the two fixed blocks 64, thus fixing the whetstone 65 to the drive shaft 62. The sliding assembly 63 has two rotating rods 66 rotatably connected inside. The sliding assembly 63 is connected to the rotating rods 66 through a shaft. The sliding of the sliding assembly 63 provides power for the rotation of the rotating rods 66, so that the rotating rods 66 rotate inside the fixed block 64.

[0035] Both rotating rods 66 have rotatably connected limit rods 67 at their distal ends. Multiple limit rods 67 are externally slidably connected to the interiors of two fixed blocks 64. The rotating rods 66 are connected to the limit rods 67 via shafts. Rotation of the rotating rods 66 causes the two limit rods 67 to slide within the fixed blocks 64, thereby fixing the fixed blocks 64 and the drive shaft 62. Support springs 68 are fixedly connected to the adjacent sides of the two rotating rods 66. The two rotating rods 66 compress the support springs 68, causing them to deform. The release of the spring force by the support springs 68 causes the two rotating rods 66 to rotate, thus embedding the limit rods 67 into the interiors of the fixed blocks 64, completing the fixation of the fixed blocks 64 and the drive shaft 62.

[0036] The sliding assembly 63 is externally fixedly connected to two sliding rods 69. The two sliding rods 69 are slidably connected to the interiors of two drive shafts 62. The drive shafts 62 guide the sliding of the sliding rods 69, allowing the sliding assembly 63 to slide within the drive shafts 62 by manually pushing the sliding rods 69. A limiting shaft 610 is slidably connected internally to the drive shafts 62. The proximal ends of the two limiting shafts 610 are slidably connected to the distal ends of the two sliding rods 69. The drive shafts 62 and the sliding rods 69 guide the sliding of the limiting shafts 610, preventing them from shifting during sliding and thus improving the sliding stability of the limiting shafts 610. A return spring 611 is fixedly connected inside the drive shaft 62. The two return springs 611 are respectively fixedly connected at their proximal ends to the proximal ends of the two limiting shafts 610. The drive shaft 62 provides support for the return springs 611 to return to their original position. The rotation of the sliding rod 69 compresses the limiting shaft 610, causing the limiting shaft 610 to deform by compressing the return springs 611. The return springs 611 release their elasticity, causing the limiting shaft 610 to return to its original position and embed itself inside the sliding rod 69, thereby fixing the sliding rod 69. A discharge frame 7 is fixedly connected to the top rear end of the support platform 2. The discharge frame 7 is used to collect the polished hand sewing needles.

[0037] Reference Figure 1 and Figure 2 The feeding mechanism 5 includes two fixed plates 51, the bottoms of which are fixedly connected to the top of the support platform 2. The support platform 2 provides fixation for the fixed plates 51, improving their support stability. A feed frame 52 is fixedly connected to an adjacent side of the two fixed plates 51. The feed frame 52 is used to store hand sewing needles to be ground. The fixed plates 51 provide fixation for the feed frame 52, thereby improving its load-bearing capacity. A support block 53 is fixedly connected to the top of the fixed plates 51 by welding. The fixed plates 51 provide support for the support block 53, thereby improving its support capacity. A cylinder 54 is fixedly connected inside the support block 53. The support block 53 provides fixation for the cylinder 54, preventing it from shifting during operation and improving its stability. A drive plate 55 is fixedly connected to the drive end of the cylinder 54. Activating the cylinder 54 provides driving force to the drive plate 55, thereby moving the drive plate 55. The drive plate 55 has two rotating plates 56 rotatably connected inside. The drive plate 55 is connected to the rotating plates 56 via shafts, and the rotation of the rotating plates 56 is achieved by the movement of the drive plate 55. Support frames 57 are fixedly connected to the left and right ends of the feed frame 52. The support frames 57 provide sliding support, and the feed frame 52 provides fixation for the support frames 57, thereby improving the load-bearing capacity of the support frames 57.

[0038] Two rotating plates 56 are internally connected to a connecting shaft 58. The left and right ends of the connecting shaft 58 are slidably connected to the interiors of two support frames 57. The support frames 57 guide the sliding of the connecting shaft 58, and the rotation of the rotating plates 56 provides power for the sliding of the connecting shaft 58, allowing it to slide smoothly. A sliding plate 59 is externally connected to the connecting shaft 58 and slidably connected to the interior of a feed frame 52. The feed frame 52 guides the sliding of the sliding plate 59, and the sliding of the connecting shaft 58 drives the sliding plate 59 to slide stably within the feed frame 52, thereby controlling the amount of material. A rotating roller 510 is internally connected to the feed frame 52. The rotating roller 510 is made of rubber and has multiple grooves inside to guide and limit the movement of the hand sewing needle. Both support frames 57 have rectangular limit grooves 511 inside, which are adapted to the shape of the connecting shaft 58 to provide stable guidance for its sliding.

[0039] Working principle: When the device is started, the start controller 3 triggers the cylinder 54 to operate, which drives the drive plate 55 to reciprocate horizontally. This causes the drive plate 55 to rotate two rotating plates 56 via a shaft. The two rotating plates 56, in turn, drive the connecting shaft 58 to rotate via a shaft. Under the limit of the support frame 57, the connecting shaft 58 slides smoothly along the guide direction of the limiting groove 511. The outer side of the sliding plate 59 is in close contact with the inner wall of the feed frame 52, allowing the connecting shaft 58 to drive the sliding plate 59 to move during feeding. The inside of the frame 52 slides up and down. When the sliding plate 59 slides upward, the hand sewing needles to be ground stored in the feed frame 52 will fall through the gap between the sliding plate 59 and the bottom of the feed frame 52. When the sliding plate 59 slides downward, the gap narrows, which can control the number of hand sewing needles falling and achieve precise control of the material quantity. The falling hand sewing needles enter the inside of the rotating roller 510 through the feed frame 52. Under the control of the controller 3, the hand sewing needles are limited and guided to ensure that the hand sewing needles are transported in a uniform posture to the drive mechanism 4 area at the top of the support platform 2.

[0040] After the hand sewing needle is conveyed to the drive mechanism 4 area, the controller 3 sends a start signal to the driver 41, causing the driver 41 to drive the rotating roller 43 to rotate (the rotating roller 43 is stably supported by the support plate 42 to prevent rotational deviation). The rotating roller 43 drives the two rotating disks 44 to rotate synchronously. The rotating disks 44 will drive the hand sewing needle to move along the conveying path at the top of the support platform 2 through friction. At the same time, the limiting block 45 on the support platform 2 will laterally limit the hand sewing needle to prevent it from deviating during the movement and ensure that it is accurately conveyed to the grinding area.

[0041] When the hand sewing needle reaches the sharpening position, the motor 61 drives the two drive shafts 62 to rotate stably. The sliding component 63 inside the drive shaft 62 has been adjusted to a position suitable for the size of the hand sewing needle by the sliding rod 69. By manually pushing the sliding rod 69, the sliding shaft 631 and the sliding block 632 slide inside the drive shaft 62. The movement of the sliding block 632 will compress the support spring 68 and deform it. The return of the support spring 68 will push the rotating rod 66 to rotate, thereby causing the limiting rod 67 to embed into the fixing block 64, completing the fixation of the drive shaft 62 and the fixing block 64. At the same time, the limiting shaft 610 is embedded into the sliding rod 69 under the elastic force of the return spring 611, further fixing the position of the drive shaft 62, so that the sharpening stone 65 rotates synchronously with the drive shaft 62. When the hand sewing needle is driven by the rotating disk 44, it passes through the... When the needle passes through the whetstone 65, the high-speed rotating whetstone 65 polishes the surface of the hand sewing needle. After polishing, the hand sewing needle continues to move under the drive of the rotating disk 44 and finally enters the discharge frame 7 for collection, realizing continuous and automated polishing of hand sewing needles. When the whetstone 65 needs to be replaced, the sliding rod 69 is manually rotated and slid to drive the sliding shaft 631 to slide inside the drive shaft 62. This causes the sliding block 632 to drive the rotating rod 66 and the limiting rod 67 to rotate and retract, thus allowing the rotating rod 66 and the limiting rod 67 to enter the drive shaft 62. At this time, the drive shaft 62 and the fixing block 64 are released, and the whetstone 65 is disassembled, thereby realizing the replacement of the whetstone 65 and improving the polishing efficiency of the whetstone 65 for hand sewing needles.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency grinding device for hand sewing needle production, comprising multiple support columns (1) and a support platform (2), characterized in that: The support platform (2) is provided with a feeding mechanism (5) at the top front end and a grinding mechanism (6) is provided inside the bottom end of the support platform (2). The grinding mechanism (6) includes a motor (61), which is externally fixedly connected to the bottom of the support platform (2). The support platform (2) is internally rotatably connected to two drive shafts (62). The drive shafts (62) are internally slidably connected to sliding components (63). The two sliding components (63) are externally slidably connected to fixed blocks (64). The two fixed blocks (64) are fixedly connected to a whetstone (65) at their adjacent ends. The sliding components (63) are internally rotatably connected to two rotating rods (66). The two rotating rods (66) are internally rotatably connected to a limit rod (67) at their distant ends. The two rotating rods (66) are fixedly connected to a support spring (68) on their adjacent sides. The sliding components (63) are externally fixedly connected to a sliding rod (69). The drive shafts (62) are internally slidably connected to a limit shaft (610). The drive shafts (62) are internally fixedly connected to a return spring (611).

2. The high-efficiency grinding device for hand sewing needle production according to claim 1, characterized in that: The feeding mechanism (5) includes two fixed plates (51). The bottom of the two fixed plates (51) is fixedly connected to the top of the support platform (2). A feeding frame (52) is fixedly connected to the adjacent side of the two fixed plates (51). A support block (53) is fixedly connected to the top of the fixed plate (51). A cylinder (54) is fixedly connected inside the support block (53). A drive plate (55) is fixedly connected to the drive end of the cylinder (54). Two rotating plates (56) are rotatably connected inside the drive plate (55). Support frames (57) are fixedly connected inside both the left and right ends of the feeding frame (52). A connecting shaft (58) is rotatably connected inside the two rotating plates (56). A sliding plate (59) is rotatably connected to the outside of the connecting shaft (58). A rotating roller (510) is rotatably connected inside the feeding frame (52). Limit grooves (511) are opened inside the two support frames (57).

3. The high-efficiency grinding device for hand sewing needle production according to claim 1, characterized in that: Both of the sliding components (63) include a sliding shaft (631), the exterior of the two sliding shafts (631) are slidably connected to the interior of the two drive shafts (62), and a sliding block (632) is rotatably connected to the adjacent end of the two sliding shafts (631).

4. The high-efficiency grinding device for hand sewing needle production according to claim 1, characterized in that: A controller (3) is fixedly connected to the top right end of the support platform (2). A drive mechanism (4) is provided at the rear end of the controller (3). The drive mechanism (4) includes a driver (41). The bottom of the driver (41) is fixedly connected to the top of the support platform (2). Two support plates (42) are fixedly connected to the top of the support platform (2). Rotating rollers (43) are rotatably connected inside the two support plates (42). Two rotating disks (44) are fixedly connected to the outside of the rotating rollers (43). A limit block (45) is fixedly connected to the top of the support platform (2). A discharge frame (7) is fixedly connected to the rear end of the top of the support platform (2).

5. The high-efficiency grinding device for hand sewing needle production according to claim 3, characterized in that: The exterior of the two sliding blocks (632) is slidably connected to the interior of the two drive shafts (62) at their respective adjacent ends, and the exterior of the two sliding blocks (632) is slidably connected to the interior of the two fixed blocks (64).

6. The high-efficiency grinding device for hand sewing needle production according to claim 1, characterized in that: The exterior of the plurality of limiting rods (67) is slidably connected to the interior of the two fixed blocks (64), and the exterior of the two sliding rods (69) is slidably connected to the interior of the two drive shafts (62).

7. The high-efficiency grinding device for hand sewing needle production according to claim 1, characterized in that: The two limiting shafts (610) are slidably connected at their proximal ends to the two sliding rods (69) at their distal ends, and the two return springs (611) are fixedly connected at their proximal ends to the two limiting shafts (610).

8. The high-efficiency grinding device for hand sewing needle production according to claim 2, characterized in that: The sliding plate (59) is slidably connected to the inside of the feed frame (52) on the outside, and the left and right ends of the connecting shaft (58) are slidably connected to the inside of the two support frames (57) respectively.

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