A hand-held lapping and polishing device based on eccentric wheel drive

Abstract

A hand-held grinding and polishing device based on eccentric wheel drive, comprising a fixed shell, an eccentric wheel drive assembly, a swing mechanism, an extension rod and a pull rod; wherein the swing mechanism is transversely arranged, the upper and lower sides of the swing mechanism are rotationally connected with the fixed shell through a rotating shaft; the rear end of the swing mechanism is provided with a fork-shaped swing rod, the inner side of the fork of the fork-shaped swing rod is connected with the outer side of the output end of the eccentric wheel drive assembly; the swing mechanism is provided with a guide through hole in the axial direction, the extension rod is arranged in the guide through hole, the outer periphery of the extension rod is slidingly connected with the guide through hole, the front end of the pull rod is hingedly connected with the rear end of the extension rod in the vertical direction, and the rear end of the pull rod is drivingly connected with the output end of the eccentric wheel drive assembly. The present application is driven by an eccentric wheel, has high reliability and stability, adopts a rolling friction pair to reduce the occurrence of device jamming, and creatively adopts a set of eccentric wheels to simultaneously provide power for left and right swinging and forward and backward movement, thereby reducing the equipment volume, increasing the stability and consistency of the output effect.

Description

Technical Field

[0001] This invention relates to the field of grinding and polishing equipment technology, and in particular to a handheld grinding and polishing device based on eccentric wheel drive. Background Technology

[0002] Polishing is a crucial step in mold making. With the increasing prevalence of plastic products, the requirements for their appearance quality are also rising. Therefore, the surface polishing quality of plastic mold cavities must be correspondingly improved, especially for molds with mirror-like or high-gloss surfaces, which require even higher surface roughness and thus more stringent polishing standards. Polishing not only enhances the aesthetics of the workpiece but also improves the corrosion resistance and wear resistance of the material surface. It also facilitates subsequent injection molding processes, such as making plastic products easier to demold and reducing production injection cycles. It is primarily used for grinding and polishing the interior of mold cavities and offers advantages such as ease of operation, wide applicability, and suitability for confined spaces.

[0003] Mold polishing is a polishing method that removes the protrusions after polishing by cutting and plastic deformation of the material surface to obtain a smooth surface. It generally uses oilstones, wool wheels, sandpaper, etc. At present, it is mainly done by hand in a back-and-forth and left-and-right reciprocating polishing operation, which is labor-intensive and inefficient.

[0004] Therefore, in view of the shortcomings of the existing technology, the present invention designs a handheld grinding and polishing device based on eccentric wheel drive to solve the above problems.

[0005] It should be noted that the above introduction to the technical background is only for the purpose of clearly and completely explaining the technical solution of the present invention and facilitating the understanding of those skilled in the art. It should not be assumed that the above content is known to those skilled in the art simply because it has been described in the background section of the present invention. Summary of the Invention

[0006] To overcome the shortcomings of the prior art, the present invention aims to provide a handheld grinding and polishing device based on eccentric wheel drive, which realizes the function of simultaneously performing left-right swing reciprocating motion and forward-backward reciprocating motion of the fixed chuck through a set of eccentric wheel mechanisms.

[0007] To achieve the above and other related objectives, the technical solution provided by this invention is: a handheld grinding and polishing device based on eccentric wheel drive, comprising a fixed housing, an eccentric wheel drive assembly, a swing mechanism, a telescopic rod, and a pull rod; wherein the swing mechanism is arranged laterally, and its upper and lower sides are rotatably connected to the fixed housing via rotating shafts; a fork-shaped swing arm is provided at the rear end of the swing mechanism, the inner side of the fork of the fork-shaped swing arm is connected to the outer side of the output end of the eccentric wheel drive assembly, driving the fork-shaped swing arm and the swing mechanism to perform left and right swinging reciprocating motion; the swing mechanism is provided with a guide through hole along the axial direction, the telescopic rod is disposed in the guide through hole, the outer periphery of the telescopic rod is slidably connected to the guide through hole, the front end of the pull rod is hinged to the rear end of the telescopic rod in the vertical direction, and the rear end of the pull rod is transmittedly connected to the output end of the eccentric wheel drive assembly, driving the pull rod and the telescopic rod to perform back and forth reciprocating motion; the eccentric wheel drive assembly is disposed on the fixed housing.

[0008] A preferred technical solution is as follows: the eccentric wheel drive assembly includes a drive motor, an eccentric wheel is provided at the output end of the drive motor, an eccentric shaft on the eccentric wheel is rotatably connected to the eccentric wheel, a first bearing is sleeved on the eccentric shaft, the top end of the eccentric shaft is connected to the rear end of the pull rod, and the first bearing is disposed in the fork of the fork-shaped rocker arm and movably connected thereto. The bearing reduces the friction between the rocker arm and the fork-shaped rocker arm, thereby increasing the output power of the handheld grinding and polishing device.

[0009] The preferred technical solution is that the width of the fork of the fork-shaped rocker arm is smaller than the diameter of the eccentric movement range of the first bearing, so as to ensure that the first bearing can drive the fork-shaped rocker arm to swing when it moves.

[0010] The preferred technical solution is that the center distance between the eccentric shaft and the eccentric wheel is adjustable, thereby expanding the application range.

[0011] The preferred technical solution is as follows: the middle part of the fork-shaped rocker arm is rotatably connected to the rotating shaft, and the front end of the fork-shaped rocker arm is provided with a lever. The top end of the lever is movably connected to the lower end of the swing mechanism, so that the fork-shaped rocker arm can output power to it from the front end of the swing mechanism.

[0012] The preferred technical solution is as follows: a second bearing is sleeved on the outer periphery of the lever, and a connecting groove is provided at the corresponding position of the swing mechanism and the lever, with the second bearing set in the connecting groove to reduce frictional resistance.

[0013] The preferred technical solution is that the front end of the telescopic rod is provided with a fixing clamp for holding an oilstone or file, which facilitates the disassembly and replacement of the oilstone and file.

[0014] The preferred technical solution is that the rotating shaft is rotatably connected to the swing mechanism through a third bearing to reduce frictional resistance.

[0015] The preferred technical solution is as follows: a fourth bearing is provided at the front end of the pull rod, and a hinge shaft is provided at the rear end of the telescopic rod. The fourth bearing is rotatably connected to the hinge shaft, which reduces frictional resistance and improves motion output efficiency.

[0016] The preferred technical solution is as follows: a linear bearing is provided in the guide hole, and the outer periphery of the telescopic rod is slidably connected to the inner side of the linear bearing to reduce the resistance encountered by the telescopic rod when it moves back and forth.

[0017] Due to the application of the above technical solution, the handheld grinding and polishing device based on eccentric wheel drive provided by the present invention has the following advantages compared with the prior art: (1) Driven by an eccentric wheel, the eccentric wheel mechanism has a relatively simple structure and high reliability and stability; it adopts a rolling friction pair, which has good durability and stability when subjected to a certain load, and can effectively reduce the occurrence of jamming in the working state of the handheld grinding and polishing device; (2) The creative use of a set of eccentric wheels provides power for both left and right swinging and forward and backward movement, which reduces the size of the equipment and allows it to be used in a small space. At the same time, it increases the stability and consistency of the output effect of the handheld grinding and polishing device, which helps to improve the precision of grinding and polishing operations. Attached Figure Description

[0018] Figure 1 This is an exploded view of a handheld grinding and polishing device based on eccentric wheel drive according to the present invention. Figure 2 This is a schematic diagram of the internal structure of a handheld grinding and polishing device based on eccentric wheel drive as described in Embodiment 1; Figure 3 This is a longitudinal sectional view of the internal structure of a handheld grinding and polishing device based on eccentric wheel drive as described in Embodiment 1; Figure 4 This is a schematic diagram of the internal structure of a handheld grinding and polishing device based on eccentric wheel drive as described in Embodiment 2; Figure 5 This is a longitudinal sectional view of the internal structure of a handheld grinding and polishing device based on eccentric wheel drive as described in Embodiment 2; Figure 6 This is a schematic diagram of the eccentric wheel in this invention.

[0019] In the above attached figures: 1. Fixed outer casing; 2. Eccentric wheel drive assembly; 21. Drive motor; 22. Eccentric wheel; 22a. Eccentric shaft; 22b. First bearing; 3. Swinging mechanism; 31. Rotating shaft; 31a. Third bearing; 32. Guide hole; 32a. Linear bearing; 33. Fork-shaped rocker arm; 33a. Lever; 33b. Second bearing; 34. Connecting groove; 4. Telescopic rod; 41. Fixed clamp; 42. Hinge shaft; 5. Pull rod; 51. Fourth bearing. Detailed Implementation

[0020] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0021] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "horizontal," "vertical," and "suspended," etc., do not mean that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0022] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Example 1: like Figure 1 As shown, this invention discloses a handheld grinding and polishing device based on an eccentric wheel drive, characterized by comprising a fixed outer shell 1, an eccentric wheel drive assembly 2, a swing mechanism 3, a telescopic rod 4, and a pull rod 5; the main components of the invention will be described in detail below: like Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, the eccentric wheel drive assembly 2 is mounted on the fixed housing 1. The eccentric wheel drive assembly 2 includes a drive motor 21. An eccentric wheel 22 is provided at the output end of the drive motor 21. An eccentric shaft 22a on the eccentric wheel 22 is rotatably connected to the eccentric wheel 22. The center distance between the eccentric shaft 22a and the eccentric wheel 22 is adjustable. A first bearing 22b is sleeved on the eccentric shaft 22a.

[0024] like Figure 1 , Figure 2 and Figure 3As shown, the swing mechanism 3 is placed horizontally, and its upper and lower ends are rotatably connected to the fixed housing 1 via a rotating shaft 31. The rotating shaft 31 is rotatably connected to the swing mechanism 3 via a third bearing 31a. It should be noted that the above structure is merely exemplary and not limiting. In this embodiment, the third bearing 31a is used as a connecting member, but in other embodiments, the rotating shaft 31 can be directly rotatably connected to the swing mechanism 3. The first bearing 22b is disposed in the fork of the fork-shaped swing rod 33 and is movably connected to it. The width of the fork of the fork-shaped swing rod 33 is smaller than the diameter of the range of motion of the first bearing 22b. The swing mechanism 3 is provided with a guide hole 32 along the axial direction, and a linear bearing 32a is disposed in the guide hole 32.

[0025] like Figure 1 , Figure 2 and Figure 3 As shown, the telescopic rod 4 is slidably connected to the inner side of the linear bearing 32a within the guide hole 32. The front end of the telescopic rod 4 is provided with a fixed chuck 41 for holding an oilstone or file, and the rear end of the telescopic rod 4 is provided with a hinge shaft 42.

[0026] like Figure 1 , Figure 2 and Figure 3 As shown, the front end of the pull rod 5 is provided with a fourth bearing 51, which is rotatably connected to the hinge shaft 42. The rear end of the pull rod 5 is movably connected to the first bearing 22b in the fork of the fork-shaped swing rod 33.

[0027] refer to Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, the principle of the present invention is as follows: The swing mechanism 3 is placed horizontally and limited by the rotating shaft 31, so that the swing mechanism 3 can swing left and right around the rotating shaft 31.

[0028] The swing mechanism 3 has a fork-shaped swing rod 33 at its rear end. The inner side of the fork of the fork-shaped swing rod 33 is connected to the first bearing 22b sleeved on the eccentric shaft 22a. As the eccentric wheel 22 rotates, the eccentric shaft 22a drives the first bearing 22b to perform circular motion. Since the width of the fork of the fork-shaped swing rod 33 is smaller than the diameter of the range of motion of the first bearing 22b, the first bearing 22b will push the fork-shaped swing rod 33 to swing back and forth during the motion, thereby causing the swing mechanism 3 to swing back and forth.

[0029] The telescopic rod 4 is installed in the guide through hole 32 of the swing mechanism 3. The telescopic rod 4 can move back and forth along the guide through hole 32. The rear end of the telescopic rod 4 is hinged to the front end of the pull rod 5. The rear end of the pull rod 5 is connected to the top end of the eccentric shaft 22a. As the eccentric wheel 22 drives the eccentric shaft 22a to perform circular motion, the eccentric shaft 22a will pull the rear end of the pull rod 5 to move together during the motion, thereby driving the telescopic rod 4 to move back and forth in the guide through hole 32. Because the rear end of the telescopic rod 4 is hinged to the front end of the pull rod 5, the left and right swing of the swing mechanism 3 and the forward and backward movement of the telescopic rod 4 can be carried out simultaneously, realizing the function of the fixed clamp 41 swinging left and right and moving forward and backward.

[0030] Example 2: like Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, the difference from Embodiment 1 is that the fork-shaped rocker arm 33 is an independent part. The middle part of the fork-shaped rocker arm 33 is rotatably connected to the rotating shaft 31. The front end of the fork-shaped rocker arm 33 is provided with a lever 33a. A second bearing 33b is sleeved on the outer periphery of the lever 33a. The swing mechanism 3 is provided with a connecting groove 34 at the corresponding position of the lever 33a. The second bearing 33b is disposed in the connecting groove 34. It should be noted that in this embodiment, the lever 33a and the connecting groove 34 are connected through the second bearing 33b. However, in other embodiments, the lever 33a and the connecting groove 34 can be directly movably connected.

[0031] refer to Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, the difference between the working principle and that of Example 1 is as follows: The fork-shaped rocker arm 33 is an independent component. The middle part of the fork-shaped rocker arm 33 is rotatably connected to the rotating shaft 31. The front end of the fork-shaped rocker arm 33 is provided with a lever 33a. The top end of the lever 33a is movably connected to the lower end of the swing mechanism 3. The inner side of the fork at the rear end of the fork-shaped rocker arm 33 is connected to the first bearing 22b sleeved on the eccentric shaft 22a. As the eccentric wheel 22 rotates, the eccentric shaft 22a drives the first bearing 22b to perform circular motion. During the motion, the first bearing 22b will push the fork-shaped rocker arm 33 to perform left and right swinging reciprocating motion. The lever 33a at the front end of the fork-shaped rocker arm 33 will drive the swing mechanism 3 to perform left and right swinging reciprocating motion.

[0032] Meanwhile, the telescopic rod 4 is installed in the guide through hole 32 of the swing mechanism 3. The telescopic rod 4 can move back and forth along the guide through hole 32. The rear end of the telescopic rod 4 is hinged to the front end of the pull rod 5. The rear end of the pull rod 5 is connected to the top end of the eccentric shaft 22a. As the eccentric wheel 22 drives the eccentric shaft 22a to perform circular motion, the eccentric shaft 22a will pull the rear end of the pull rod 5 to move together during the motion, thereby driving the telescopic rod 4 to move back and forth in the guide through hole 32.

[0033] In summary, the handheld grinding and polishing device based on eccentric wheel drive disclosed in this invention can achieve the function of simultaneously performing left-right swinging reciprocating motion and forward-backward reciprocating motion of the fixed chuck through a set of eccentric wheel drive outputs during use. It has the advantages of small size, anti-jamming, and high consistency of output operation effect.

[0034] The embodiments provided above are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A handheld grinding and polishing device based on eccentric wheel drive, characterized in that: The assembly includes a fixed housing (1), an eccentric wheel drive assembly (2), a swing mechanism (3), a telescopic rod (4), and a pull rod (5). The swing mechanism (3) is placed horizontally, and its upper and lower ends are rotatably connected to the fixed housing (1) through a rotating shaft (31). The swing mechanism (3) has a fork-shaped swing rod (33) at its rear end, and the inner side of the fork of the fork-shaped swing rod (33) is connected to the output end of the eccentric wheel drive assembly (2). The swing mechanism (3) has a guide hole (32) along the axial direction. The telescopic rod (4) is slidably connected to the guide hole (32). The front end of the pull rod (5) is hinged to the rear end of the telescopic rod (4) in the vertical direction. The rear end of the pull rod (5) is drivenly connected to the output end of the eccentric wheel drive assembly (2). The eccentric wheel drive assembly (2) is mounted on the fixed housing (1). The eccentric wheel drive assembly (2) includes a drive mechanism (3) and a pull rod (5). The drive motor (21) has an eccentric wheel (22) at its output end. The eccentric wheel (22) has an eccentric shaft (22a) that is rotatably connected to the eccentric wheel (22). The eccentric shaft (22a) is fitted with a first bearing (22b). The top end of the eccentric shaft (22a) is connected to the rear end of the pull rod (5). The first bearing (22b) is located in the fork of the fork-shaped rocker arm (33) and is movably connected to it. The width of the fork of the fork-shaped rocker arm (33) is smaller than the diameter of the range of motion of the first bearing (22b). The center distance between the eccentric shaft (22a) and the eccentric wheel (22) is adjustable. The middle part of the fork-shaped rocker arm (33) is rotatably connected to the rotating shaft (31). The front end of the fork-shaped rocker arm (33) has a lever (33a). The top end of the lever (33a) is movably connected to the lower end of the swing mechanism (3).

2. The handheld grinding and polishing device based on eccentric wheel drive according to claim 1, characterized in that: The lever (33a) is fitted with a second bearing (33b) on its outer periphery. The swing mechanism (3) is provided with a connecting groove (34) at the corresponding position of the lever (33a), and the second bearing (33b) is disposed in the connecting groove (34).

3. The handheld grinding and polishing device based on eccentric wheel drive according to claim 1, characterized in that: The front end of the telescopic rod (4) is provided with a fixed clamp (41) for holding an oilstone or file.

4. The handheld grinding and polishing device based on eccentric wheel drive according to claim 1, characterized in that: The rotating shaft (31) is rotatably connected to the swing mechanism (3) via a third bearing (31a).

5. A handheld grinding and polishing device based on eccentric wheel drive according to claim 1, characterized in that: The front end of the pull rod (5) is provided with a fourth bearing (51), and the rear end of the telescopic rod (4) is provided with a hinge shaft (42). The fourth bearing (51) is rotatably connected to the hinge shaft (42).

6. The handheld grinding and polishing device based on eccentric wheel drive according to claim 1, characterized in that: A linear bearing (32a) is provided inside the guide hole (32), and the outer periphery of the telescopic rod (4) is slidably connected to the inner side of the linear bearing (32a).

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