A multi-purpose nylon core hand-held pulling device

Abstract

This invention relates to the field of hand tool technology, and more particularly to a multi-purpose handheld nylon core wire drawing device, comprising: a handle; a support frame disposed in a mounting hole in the handle; a triangular plate fixed to the support frame; a motor mounted in the middle of the triangular plate; a power transmission mechanism disposed on the triangular plate, wherein the motor drives a hollow drive shaft to rotate via the power transmission mechanism; and a working head detachably mounted on the hollow drive shaft. This invention adopts a modular working head design, allowing for quick replacement of the drive pulley and the nylon wheel, achieving multi-functional integration of belt sanding and nylon wheel wire drawing, thus overcoming the shortcomings of traditional handheld tools in terms of limited functionality and poor compatibility. The device is locked in place by a limit ring, ensuring stable and reliable operation of the working head during high-speed rotation and smooth power transmission, significantly improving the applicability and operational efficiency of the equipment.

Description

Technical Field

[0001] This invention relates to the field of hand tool technology, and more particularly to a multi-purpose handheld nylon core drawing device. Background Technology

[0002] In the field of metal surface treatment and decorative processing, wire drawing and polishing are core processes for improving the appearance and functionality of workpieces. Traditional wire drawing operations mostly use fixed equipment with special wire drawing wheels. Although this can produce uniform straight textures, the equipment is large and expensive, making it difficult to adapt to flexible operating scenarios such as small-batch, multi-variety processing or on-site repairs. At the same time, while ordinary handheld angle grinders are easy to operate, their excessively high speed and rigidity can easily cause scratches or uneven textures on the workpiece surface, making it difficult to meet the fine requirements of decorative wire drawing.

[0003] To balance portability and surface quality, the industry has developed flexible wire drawing wheels with nylon cores in recent years. These wheels embed abrasives such as alumina and silicon carbide into high-strength nylon material, combining elasticity and cutting force to effectively prevent overcutting. They are particularly suitable for fine wire drawing of stainless steel, aluminum alloys, and other metals. However, existing handheld wire drawing devices are mostly single-function designs, only compatible with specific nylon wheel specifications. They cannot meet users' needs for quick switching between different processes such as deburring, rough grinding, and fine polishing, often requiring multiple devices, increasing operating costs and complexity. On the other hand, belt sanders are widely used for grinding curved or irregularly shaped workpieces due to their continuous cutting, good heat dissipation, and easy replacement. However, currently available handheld belt sanders and wire drawing machines have significant structural differences; their drive methods, tensioning mechanisms, and interface standards are incompatible. No mature product has yet achieved efficient integration of nylon wire drawing wheels and belt sanders on the same main unit. Even if some tools claim to be "multifunctional", they often achieve this by using a bulky external adapter, sacrificing operational flexibility and overall stability.

[0004] In summary, there is an urgent need to develop a handheld wire drawing device that is compact, allows for quick head changes, and is compatible with both nylon wire drawing wheels and abrasive belts. Summary of the Invention

[0005] In order to overcome the shortcomings of existing handheld surface treatment tools, such as limited functionality, poor compatibility, difficulty in simultaneously meeting the needs of multiple processes such as nylon wheel drawing and belt sanding, and the bulky nature of the equipment and insufficient operational flexibility, this invention provides a multi-purpose handheld nylon core drawing device.

[0006] A multi-purpose handheld nylon core drawing device includes: a handle; a support frame disposed in a mounting hole in the handle; a triangular plate fixed to the support frame; a motor mounted in the middle of the triangular plate; a hollow drive shaft rotatably connected to the right side of the triangular plate; a power transmission mechanism disposed on the motor, the motor driving the hollow drive shaft to rotate through the power transmission mechanism; a working head detachably mounted on the hollow drive shaft; a driven pulley and a tensioning mechanism disposed on the triangular plate; an abrasive belt wound around the working head, the driven pulley and the tensioning mechanism; and a locking assembly disposed on the support frame for adjusting the working angle of the triangular plate.

[0007] As a preferred embodiment of the present invention, the power transmission mechanism includes: a pulley fixed to the output shaft of the motor, a pulley fixed to the front end of the hollow transmission shaft, and a flat belt wound around the two pulleys; the rear end of the hollow transmission shaft is threadedly connected to a limit ring.

[0008] As a preferred embodiment of the present invention, the working head is a drive pulley, which is keyed to a hollow transmission shaft.

[0009] As a preferred embodiment of the present invention, the working head is a nylon wheel, which is also keyed to the hollow drive shaft.

[0010] As a preferred embodiment of the present invention, the tensioning mechanism includes: a slider slidably connected to the upper part of a triangular plate, a first spring connected between the slider and the triangular plate, and a tensioning wheel rotatably connected to the slider; the sanding belt is wound around the working head, the driven pulley and the tensioning wheel, and the first spring drives the slider to drive the tensioning wheel to keep the sanding belt taut.

[0011] As a preferred embodiment of the present invention, the triangular plate is provided with a cooling component, the cooling component comprising: a fixed frame fixed to the triangular plate, a gas delivery pipe fixed to the fixed frame, blades disposed in the hollow drive shaft, and an air outlet frame disposed on the lower right side of the triangular plate; the inlet end of the gas delivery pipe is attached to the front end of the hollow drive shaft, and the outlet end is fixed to the air outlet frame; three evenly distributed oblique air outlets are opened on the bottom wall of the air outlet frame.

[0012] As a preferred embodiment of the present invention, the locking assembly includes: a fixed tooth fixed to the front side of the support frame, a locking tooth slidably connected to the handle, and a second spring connecting the locking tooth and the handle; the fixed tooth rotates with the support frame in the mounting hole of the handle, and the left side of the locking tooth has a locking groove that engages with the protruding tooth of the fixed tooth; a first bolt is threaded onto the handle, and the end of the first bolt abuts against the locking tooth to keep it engaged with the fixed tooth.

[0013] As a preferred embodiment of the present invention, an arc-shaped baffle is fitted on the hollow drive shaft, and a second bolt is threaded onto the triangular plate, with the rear end of the second bolt abutting against the front side of the arc-shaped baffle; an arc-shaped rubber pad is provided on the side of the arc-shaped baffle near the second bolt.

[0014] The beneficial effects of this invention are as follows: This invention adopts a modular working head design, and the active pulley and nylon wheel can be quickly replaced, realizing the multi-functional integration of belt sanding and nylon wheel wire drawing, which solves the shortcomings of traditional hand tools with single function and poor compatibility; by locking and fixing with limit rings, it ensures that the working head is stable and reliable during high-speed rotation, and the power transmission is smooth, which greatly improves the applicability and work efficiency of the equipment.

[0015] This invention uses a slider, a first spring, and a tensioning wheel to form an adaptive tensioning mechanism, which ensures that the abrasive belt maintains a constant tension during the grinding process, preventing slippage or loosening and ensuring processing quality. At the same time, the rotating blades in the hollow drive shaft generate a cooling airflow, which is blown onto the workpiece surface through the air outlet frame, effectively reducing the temperature of the processing area, preventing thermal deformation of the workpiece, and blowing away debris, thus improving the working environment.

[0016] This invention enables flexible adjustment of the working angle of the triangular plate and sanding belt through the positioning component, which can adapt to the processing requirements of irregular workpieces or specific angles; combined with the anti-splash design of the arc baffle, it effectively blocks the splashing of debris, improves the safety of operation, and has a compact overall structure and flexible operation, which significantly improves the precision processing level and user experience of the handheld wire drawing device. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram from the first perspective of the present invention.

[0018] Figure 2 This is a three-dimensional structural schematic diagram from the second perspective of the present invention.

[0019] Figure 3 This is a three-dimensional structural diagram of the slider, tension wheel, and first spring components of the present invention.

[0020] Figure 4 This is a three-dimensional structural diagram of the active pulley, driven pulley, and other components of the present invention.

[0021] Figure 5 This is a three-dimensional structural diagram of the gas delivery pipe, gas outlet frame, and blades of the present invention.

[0022] Figure 6 This is a three-dimensional structural diagram of the components such as the fixing tooth, the locking tooth, and the second spring of the present invention.

[0023] Figure 7 This is a three-dimensional structural diagram of the triangular plate and arc-shaped baffle of the present invention.

[0024] Reference numerals: 101_Handle, 102_Bearing frame, 103_Triangle plate, 104_Motor, 105_Hollow drive shaft, 106_Driving pulley, 1061_Sanding belt, 107_Driven pulley, 108_Slider, 109_Tensioner, 110_First spring, 111_Flat belt, 201_Fixed frame, 202_Gas delivery pipe, 203_Gas outlet frame, 204_Blade, 205_Limiting ring, 301_Fixed tooth, 302_Clamping tooth, 303_Second spring, 304_First bolt, 401_Arc-shaped baffle, 402_Second bolt. Detailed Implementation

[0025] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0026] Example 1: A multi-purpose handheld nylon core wire drawing device for wire drawing of metal workpiece surfaces, such as... Figures 1-4 As shown, the device includes a handle 101, a rotatable support frame 102 housed in a mounting hole of the handle 101, a triangular plate 103 fixedly connected to the support frame 102, a motor 104 mounted in the middle of the triangular plate 103, and a pulley fixedly connected to the output shaft of the motor 104 via a coupling; a hollow drive shaft 105 is rotatably connected to the right side of the triangular plate 103, and another pulley is fixedly connected to the front end of the hollow drive shaft 105; a flat belt 111 is wound around the two pulleys, forming a belt drive mechanism for transmitting power from the motor 104 to the hollow drive shaft 105; a drive pulley 106 or a nylon pulley is keyed to the hollow drive shaft 105. In any of the wheel types, the left side of the triangular plate 103 is rotatably connected to the driven pulley 107, and the upper part of the triangular plate 103 is slidably connected to the slider 108. The slider 108 and the triangular plate 103 are connected by a first spring 110. The slider 108 is rotatably connected to the tensioning wheel 109. The driving pulley 106, the driven pulley 107 and the tensioning wheel 109 are wound with sanding belt 1061. The slider 108 and the first spring 110 ensure that the tensioning wheel 109 always tensions the sanding belt 1061. The support frame 102 is provided with a locking assembly to control its rotation angle, which is used to adjust the working angle of the triangular plate 103 and the sanding belt 1061.

[0027] like Figure 4 As shown, specifically, the rear end of the hollow drive shaft 105 is threadedly connected to a limit ring 205, which is used to firmly fix the drive pulley 106 or the nylon wheel onto the hollow drive shaft 105 to prevent it from slipping and to ensure stable power transmission.

[0028] like Figure 5As shown, specifically, the triangular plate 103 is equipped with a cooling component for blowing air onto the workpiece grinding area to reduce the temperature of the workpiece during wire drawing and prevent thermal deformation. The cooling component includes a fixing frame 201 fixed to the triangular plate 103, a gas delivery pipe 202 fixed inside the fixing frame 201, the air inlet end of the gas delivery pipe 202 being in contact with the front end of the hollow drive shaft 105, the hollow drive shaft 105 having blades 204 inside, an air outlet frame 203 being provided on the lower right side of the triangular plate 103, and the air outlet end of the gas delivery pipe 202 being fixed to the air outlet frame 203.

[0029] When the motor 104 drives the hollow drive shaft 105 to rotate via the flat belt 111, the hollow drive shaft 105 drives the blades 204 to rotate synchronously. The rotating blades 204 use their tilt angle and airfoil cross section to push air from the rear to the front, realizing directional airflow to form wind. External cold air enters the gas delivery pipe 202 through the hollow drive shaft 105 and is finally blown onto the surface of the workpiece from the air outlet 203, which plays a role in cooling.

[0030] The bottom wall of the air outlet frame 203 has three evenly distributed oblique air outlets to better guide the air force to the surface of the workpiece and improve the cooling effect.

[0031] like Figure 6 As shown, specifically, the locking assembly includes a fixing tooth 301 fixed to the front side of the support frame 102, which can rotate within the mounting hole of the handle 101. The handle 101 has a slidably connected locking tooth 302 near its mounting hole, and the locking tooth 302 is connected to the handle 101 by symmetrically arranged second springs 303. The left side of the locking tooth 302 has a groove that engages with the protruding teeth of the fixing tooth 301. Through the engagement of the locking tooth 302 and the fixing tooth 301, the support frame 102 can be locked at the desired angle.

[0032] The handle 101 has a first bolt 304 threadedly connected to the side near the locking tooth 302, which is used to fix the locking tooth 302 and prevent it from loosening. When the first bolt 304 is screwed into the handle 101, the left end of the first bolt 304 abuts against the locking tooth 302, so that the locking tooth 302 firmly locks the fixing tooth 301, thereby achieving angle locking.

[0033] like Figure 7 As shown, specifically, the hollow drive shaft 105 is provided with an arc-shaped baffle 401, and the triangular plate 103 is threadedly connected with a second bolt 402, the rear end of the second bolt 402 being in contact with the front side of the arc-shaped baffle 401. The arc-shaped baffle 401 is used to block debris and prevent it from flying around, and its position can be adjusted to adapt to different working conditions; the side of the arc-shaped baffle 401 near the second bolt 402 is provided with an arc-shaped rubber pad to increase friction and facilitate tightening.

[0034] Working Principle: This device is used for surface treatment of metal workpieces, simultaneously meeting the needs of both belt abrasion (1061) and nylon wheel wire drawing. The specific working process is as follows: The motor 104 is started. The output shaft of the motor 104 drives the hollow transmission shaft 105 to rotate via a pulley and a flat belt 111, which in turn drives the drive pulley 106, which is keyed to it, to rotate. Since the abrasive belt 1061 is wound between the drive pulley 106, the driven pulley 107, and the tension pulley 109, the drive pulley 106 drives the abrasive belt 1061 to rotate through friction, causing the driven pulley 107 and the tension pulley 109 to rotate synchronously. The operator holds the handle 101 and brings the rotating abrasive belt 1061 into contact with the workpiece surface to perform the abrasion operation.

[0035] During the grinding process, when the abrasive belt 1061 is pressed against the workpiece, the lower side of the abrasive belt 1061 is under force. The tension wheel 109 moves slightly downward along with the slider 108, overcoming the elastic force of the first spring 110, to compensate for the change in the circumference of the abrasive belt 1061 and maintain a constant tension. When the abrasive belt 1061 detaches from the workpiece, the first spring 110 returns to its original position, pushing the slider 108 and the tension wheel 109 upward, so that the abrasive belt 1061 returns to its initial tension state. This mechanism ensures that the abrasive belt 1061 always adheres to the pulleys under various working conditions, preventing slippage or loosening.

[0036] When replacing the workpiece with a nylon wheel for wire drawing, first move the slider 108 downwards to compress the first spring 110, causing the tension wheel 109 to move downwards. This reduces the perimeter of the triangle formed by the driving pulley 106, the driven pulley 107, and the tension wheel 109, loosening the abrasive belt 1061, which can then be removed. Next, unscrew the limit ring 205, remove the driving pulley 106 from the hollow drive shaft 105, install the nylon wheel, and then tighten the limit ring 205 to secure it. This completes the replacement of the work head. Start the motor 104 to drive the nylon wheel to rotate, and the workpiece can be wire drawn.

[0037] To prevent debris from flying during wire drawing or grinding, the device is equipped with an arc-shaped baffle 401. The operator can loosen the second bolt 402, rotate the arc-shaped baffle 401 to a suitable position (to block debris without interfering with the nylon wheel), and then tighten the second bolt 402, with its end pressing against the rubber pad on the arc-shaped baffle 401 to achieve locking and positioning.

[0038] For irregularly shaped workpieces or specific machining angle requirements, the orientation of the triangular plate 103 can be adjusted. First, loosen the first bolt 304 to disengage it from the locking tooth 302; then rotate the triangular plate 103, causing the support frame 102 and the fixed tooth 301 to rotate within the mounting hole of the handle 101. During rotation, the inclined surface of the protruding tooth of the fixed tooth 301 pushes the locking tooth 302 to compress the second spring 303 and move it to the right; when the triangular plate 103 rotates to the desired angle, the second spring 303 pushes the locking tooth 302 to move to the left and reset, its groove engaging with the protruding tooth of the fixed tooth 301 to achieve initial positioning. Finally, tighten the first bolt 304 to abut against the locking tooth 302, preventing the locking tooth 302 from loosening, ensuring a secure angle lock, and avoiding deflection during operation.

[0039] During grinding or wire drawing, the hollow drive shaft 105 rotates with the motor 104, and the blades 204 inside rotate synchronously. The centrifugal force generated by the rotation of the blades 204 draws external cool air into the rear of the hollow drive shaft 105. The air flows through the inner cavity of the hollow drive shaft 105 into the gas delivery pipe 202, and is finally blown out from the three angled air outlets at the bottom of the air outlet frame 203, acting directionally on the surface of the workpiece. This airflow can effectively reduce the temperature of the processing area, prevent thermal deformation of the workpiece, and at the same time blow away surface debris, improving the working environment.

[0040] This device integrates 1061 belt sanding and nylon wheel wire drawing through a modular working head design and quick-change structure, solving the shortcomings of traditional handheld tools that are limited in function and have poor compatibility. Combined with angle adjustment, adaptive tensioning and cooling dust removal mechanisms, it significantly improves the flexibility of operation and the level of precision in processing.

[0041] Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that various changes or modifications can be made to the invention without departing from the principles and spirit of the invention as defined by the claims. Therefore, the detailed description of the embodiments in this disclosure is for illustrative purposes only and is not intended to limit the invention; rather, the scope of protection is defined by the content of the claims.

Claims

1. A multi-purpose nylon core hand-held wire drawing device characterized by, It includes: a handle (101); a support frame (102) disposed in the mounting hole of the handle (101); a triangular plate (103) fixed to the support frame (102); a motor (104) mounted in the middle of the triangular plate (103); a hollow drive shaft (105) rotatably connected to the right side of the triangular plate (103); a power transmission mechanism disposed on the motor (104), the motor (104) driving the hollow drive shaft (105) to rotate through the power transmission mechanism; a working head detachably mounted on the hollow drive shaft (105); a driven pulley (107) and a tensioning mechanism disposed on the triangular plate (103); an abrasive belt (1061) wound around the working head, the driven pulley (107) and the tensioning mechanism; and a positioning assembly disposed on the support frame (102) for adjusting the working angle of the triangular plate (103).

2. A multi-purpose nylon core hand-held stringing device as defined in claim 1, wherein, The power transmission mechanism includes: a pulley fixed to the output shaft of the motor (104), a pulley fixed to the front end of the hollow transmission shaft (105), and a flat belt (111) wound around the two pulleys; the rear end of the hollow transmission shaft (105) is threadedly connected to a limit ring (205).

3. A multi-purpose nylon core hand-held stringing device as defined in claim 2 wherein, The working head is a drive pulley (106), which is keyed to the hollow drive shaft (105).

4. A multi-purpose nylon core hand-held stringing device as defined in claim 2 wherein, The working head is a nylon wheel, which is also keyed to the hollow drive shaft (105).

5. A multi-purpose handheld nylon core drawing device as described in claim 1, characterized in that, The tensioning mechanism includes: a slider (108) slidably connected to the upper part of the triangle plate (103), a first spring (110) connected between the slider (108) and the triangle plate (103), and a tensioning wheel (109) rotatably connected to the slider (108); the sanding belt (1061) is wound around the working head, the driven pulley (107) and the tensioning wheel (109), and the first spring (110) drives the slider (108) to drive the tensioning wheel (109) to keep the sanding belt (1061) taut.

6. A multi-purpose handheld nylon core drawing device as described in claim 1, characterized in that, The triangular plate (103) is provided with a cooling component, which includes: a fixed frame (201) fixed to the triangular plate (103), a gas conveying pipe (202) fixed to the fixed frame (201), a blade (204) disposed in the hollow drive shaft (105), and an air outlet frame (203) disposed on the lower right side of the triangular plate (103); the air inlet end of the gas conveying pipe (202) is attached to the front end of the hollow drive shaft (105), and the air outlet end is fixed to the air outlet frame (203); the bottom wall of the air outlet frame (203) has three evenly distributed oblique air outlets.

7. A multi-purpose handheld nylon core drawing device as described in claim 1, characterized in that, The locking assembly includes: a fixed tooth (301) fixed to the front side of the support frame (102), a locking tooth (302) slidably connected to the handle (101), and a second spring (303) connected between the locking tooth (302) and the handle (101); the fixed tooth (301) rotates with the support frame (102) in the mounting hole of the handle (101), and the left side of the locking tooth (302) has a locking groove that meshes with the protrusion of the fixed tooth (301); a first bolt (304) is threaded onto the handle (101), and the end of the first bolt (304) abuts against the locking tooth (302) to keep it in a meshing state with the fixed tooth (301).

8. A multi-purpose nylon core hand-held stringing device as defined in claim 1, wherein, An arc-shaped baffle (401) is fitted on the hollow drive shaft (105), and a second bolt (402) is threaded onto the triangular plate (103). The rear end of the second bolt (402) abuts against the front side of the arc-shaped baffle (401). An arc-shaped rubber pad is provided on the side of the arc-shaped baffle (401) near the second bolt (402).

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