Eccentric rotary grinding device

Abstract

An eccentric rotary grinding device comprises a fixed shell, an eccentric wheel assembly, a supporting piece, a power motor and a connecting rod, a first mounting hole and a second mounting hole are formed in the upper end of the fixed shell, the supporting piece comprises an elastic rotary body, and an upper pin column and a lower pin column are arranged at the two shaft ends of the elastic rotary body respectively; the eccentric wheel assembly comprises an eccentric wheel seat and an eccentric shaft, a bearing groove is eccentrically arranged at the upper end of the eccentric wheel seat, and a chuck is arranged at the front end of the connecting rod. The supporting piece made of the elastic material serves as a movement fulcrum of the connecting rod for grinding, interference to movement of the eccentric wheel assembly at the rear end of the connecting rod is avoided, and grinding efficiency is improved. A chuck structure is arranged at the front end of the connecting rod for grinding, so that a file and oilstone can be conveniently mounted on a positioning plate; two driving modes of an electric motor and a pneumatic motor can be adopted, and the space occupation of the device is reduced by adopting the electric motor; and the handheld structure is perpendicular to the arrangement direction of the connecting rod for grinding, so that the operation difficulty of grinding the side wall of the mold cavity is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding and polishing equipment, in particular to an eccentric rotating grinding device. Background Art

[0002] The handheld grinding device is mainly used for grinding and polishing the inside of the mold cavity. It has the advantages of easy operation, strong applicability, and the ability to operate in a small space.

[0003] Chinese patent CN206393398U discloses a small-angle and small-gap grinder, which includes a main shell, an air motor, an eccentric block, a small shaft, an axial bearing, a center screw, a vibrating foot column, a grinding disc fixing part and an angle grinding disc. The main shell is provided with a large installation cavity and a small installation cavity arranged at a side position of the bottom of the large installation cavity. The air motor is arranged in the large installation cavity, and the vibrating foot column is located in the small installation cavity. The utility model has an ingenious and reasonable structural design. The middle position of the grinding disc fixing part is arranged at the lower end of the vibrating foot column. The eccentric block rotates under the drive of the air motor, and then drives the grinding disc fixing part to swing back and forth with the vibrating foot column as a fulcrum through the small shaft center, so as to achieve the purpose of small-gap and small-angle grinding, and the grinding efficiency is high and the grinding effect is good. In addition, the overall structure is compact, simple, small in size, light in weight, easy to operate and use, and conducive to wide promotion and application.

[0004] Although the above design improves the grinding efficiency, it is only suitable for sandpaper grinding and lacks an effective fixing structure for the file and the oilstone. At the same time, the vibrating foot column therein will produce great resistance to the movement of the eccentric device during the grinding operation. The transmission connection is prone to wear due to long-term use and the grinding efficiency of the grinder is low.

[0005] Therefore, in view of the deficiencies in the prior art, the utility model designs an eccentric rotating grinding device to solve the above problems.

[0006] It should be noted that the above introduction to the technical background is only for the convenience of clearly and completely explaining the technical solution of the utility model and facilitating the understanding of those skilled in the art. It cannot be considered that the above contents are well known to those skilled in the art simply because they are explained in the background technology of the utility model. Utility Model Content

[0007] In order to overcome the deficiencies in the above-mentioned prior art, the purpose of the utility model is to provide an eccentric rotary grinding device, which provides a movement fulcrum for a connecting rod by means of a support member with an elastic rotating body, utilizes the elasticity of the elastic rotating body to reduce the movement interference with the eccentric wheel assembly, and improves the output efficiency; at the same time, a chuck is arranged on the connecting rod to facilitate the installation and fixation of the file and the oilstone.

[0008] To achieve the above-mentioned purpose and other related purposes, the technical solution provided by the utility model is: an eccentric rotating grinding device, comprising a fixed shell, an eccentric wheel assembly, a support, a power motor and a connecting rod, the upper end of the fixed shell is provided with a first mounting hole and a second mounting hole, the support comprises an elastic rotating body, the upper and lower axial ends of the elastic rotating body are respectively provided with an upper pin and a lower pin; the lower pin is connected to the first mounting hole, the eccentric wheel assembly comprises an eccentric wheel seat and an eccentric shaft, a bearing groove is eccentrically provided at the upper end of the eccentric wheel seat, a bearing is provided in the bearing groove, the outer periphery of the eccentric shaft is connected to the inner side of the bearing, the eccentric wheel seat is arranged in the second mounting hole, the bottom of the eccentric wheel seat is transmission-connected to the output end of the power motor, a chuck is provided at the front end of the connecting rod, the rear section of the connecting rod is connected to the top of the eccentric shaft, and the front section of the connecting rod is connected to the upper pin.

[0009] The preferred technical solution is: a hand-held structure perpendicular to the setting direction of the connecting rod is provided at the lower end of the fixed shell.

[0010] The preferred technical solution is: the elastic rotating body is arranged as a wasp waist-shaped structure with thick ends and thin middle.

[0011] The preferred technical solution is that the elastic rotating body is made of rubber material to ensure its elasticity and certain strength.

[0012] The preferred technical solution is that the power motor is a pneumatic motor with stable output.

[0013] The preferred technical solution is that the power motor is an electric motor, which does not need to be connected to an air pipe and has a wider range of applications.

[0014] The preferred technical solution is that the chuck includes a slot, and a fastening hole is provided on one side of the slot for fixing the oilstone or the file in cooperation with a fastening bolt.

[0015] The preferred technical solution is: a void groove is further provided at the upper end of the fixed shell, and the first mounting hole and the second mounting hole are respectively arranged at the front and rear ends of the bottom of the void groove, so as to facilitate the disassembly and assembly of the eccentric wheel assembly and the support.

[0016] Due to the application of the above technical solution, the eccentric rotary grinding device provided by the utility model has the following advantages over the prior art:

[0017] (1) Using elastic material support as the fulcrum of the grinding connecting rod avoids interference with the movement of the eccentric wheel assembly at the rear end of the connecting rod, thereby improving the grinding efficiency;

[0018] (2) A chuck structure is provided at the front end of the connecting rod for grinding, which is convenient for installing the positioning plate for the file and the oilstone;

[0019] (3) It can be driven by electric motor or pneumatic motor. The use of electric motor can reduce the space occupied by the device and improve adaptability;

[0020] (4) The hand-held structure is set perpendicular to the connecting rod for grinding, which can reduce the difficulty of grinding the side wall of the mold cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram of an eccentric rotating grinding device of the utility model;

[0022] Figure 2 This is an exploded diagram of an eccentric rotating grinding device of the utility model;

[0023] Figure 3 It is a structural schematic diagram of a fixed housing in the utility model;

[0024] Figure 4 It is a structural schematic diagram of the eccentric wheel seat in the utility model;

[0025] Figure 5 It is a structural schematic diagram of the support member in the utility model;

[0026] Figure 6 for Figure 2 A partial enlarged view of point A in the middle.

[0027] In the above drawings, 1. fixed shell; 11. first mounting hole; 12. second mounting hole; 13. hand-held structure; 14. air avoidance groove; 2. eccentric wheel assembly; 21. eccentric wheel seat; 21a. bearing groove; 21b. bearing; 22. eccentric shaft; 3. support member; 31. elastic rotating body; 32. upper pin; 33. lower pin; 4. power motor; 5. connecting rod; 51. chuck; 51a. slot; 51b. fastening hole. DETAILED DESCRIPTION

[0028] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0029] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, terms such as "horizontal", "vertical", and "overhanging" do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only 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.

[0030] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] like Figure 1 As shown, the utility model discloses an eccentric rotary grinding device, including a fixed housing 1, an eccentric wheel assembly 2, a support member 3, a power motor 4 and a connecting rod 5. The main components of the utility model are described in detail below:

[0032] like Figure 1 , Figure 2 and Figure 3 As shown, the upper end of the fixed shell 1 is provided with a first mounting hole 11 and a second mounting hole 12, a hand-held structure 13 and an air-avoiding groove 14, and the first mounting hole 11 and the second mounting hole 12 are respectively arranged at the front and rear ends of the bottom of the air-avoiding groove 14.

[0033] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the eccentric wheel assembly 2 includes an eccentric wheel seat 21 and an eccentric shaft 22. A bearing groove 21a is eccentrically provided at the upper end of the eccentric wheel seat 21. A bearing 21b is provided in the bearing groove 21a. The outer periphery of the eccentric shaft 22 is connected to the inner side of the bearing 21b. The eccentric wheel seat 21 is arranged in the second mounting hole 12.

[0034] like Figure 1 , Figure 3 and Figure 5As shown, the support member 3 includes an elastic rotating body 31 made of rubber material, and the elastic rotating body 31 is a wasp waist structure with thick ends and thin middle; the upper and lower axial ends of the elastic rotating body 31 are respectively provided with an upper pin 32 and a lower pin 33; the lower pin 33 is connected to the first mounting hole 11. It should be noted that the above structure is only exemplary and not restrictive. In this embodiment, the elastic rotating body 31 is made of rubber, but in other embodiments, the elastic rotating body 31 can also be made of urethane foam.

[0035] like Figure 1 and Figure 2 As shown, the power motor 4 is an electric motor disposed at the lower end of the fixed housing 1, and its output end is transmission-connected to the bottom of the eccentric wheel seat 21. It should be noted that in this embodiment, the power motor 4 is an electric motor, but in other embodiments, the power motor 4 can also be a pneumatic motor.

[0036] like Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, a chuck 51 is provided at the front end of the connecting rod 5, and the chuck 51 includes a slot 51a, and a fastening hole 51b is provided on one side of the slot 51a; the rear section of the connecting rod 5 is connected to the top of the eccentric shaft 22, and the front section of the connecting rod 5 is connected to the upper pin 32, and the setting direction of the connecting rod 5 is perpendicular to the handheld structure 13.

[0037] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the principle of the utility model is: when in use, the power motor 4 drives the eccentric wheel assembly 2 to rotate, and the connecting rod 5 connected to the eccentric shaft 22 swings with the support member 3 as a fulcrum, thereby causing the chuck 51 and the file or oilstone fixed on the chuck 51 to swing. In this process, the elastic rotating body 31 is slightly bent by the force of the connecting rod 5 to cooperate with the eccentric movement of the eccentric shaft 22, thereby reducing the resistance of the support member 3 to the swing of the connecting rod 5 and improving the grinding efficiency.

[0038] The above embodiment provided by the utility model is only an example of the principle and effect of the utility model, and is not used to limit the utility model. Anyone familiar with this technology can modify or change the above embodiment without violating the spirit and scope of the utility model. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed by the utility model should still be covered by the claims of the utility model.

Claims

1. An eccentric rotating grinding device, Features: The invention comprises a fixed housing (1), an eccentric wheel assembly (2), a support member (3), a power motor (4) and a connecting rod (5); the upper end of the fixed housing (1) is provided with a first mounting hole (11) and a second mounting hole (12); the support member (3) comprises an elastic rotating body (31); upper and lower axial ends of the elastic rotating body (31) are respectively provided with an upper pin (32) and a lower pin (33); the lower pin (33) is connected to the first mounting hole (11); the eccentric wheel assembly (2) comprises an eccentric wheel seat (21) and an eccentric shaft (22); the eccentric wheel seat (21) is provided with an eccentric shaft (22); ) is eccentrically provided with a bearing groove (21a) at the upper end, a bearing (21b) is provided in the bearing groove (21a), the outer periphery of the eccentric shaft (22) is connected to the inner side of the bearing (21b), the eccentric wheel seat (21) is arranged in the second mounting hole (12), the bottom of the eccentric wheel seat (21) is transmission-connected to the output end of the power motor (4), a chuck (51) is provided at the front end of the connecting rod (5), the rear section of the connecting rod (5) is connected to the top of the eccentric shaft (22), and the front section of the connecting rod (5) is connected to the upper pin (32).

2. An eccentric rotary grinding device according to claim 1, Features: The lower end of the fixed housing (1) is provided with a hand-held structure (13) which is perpendicular to the setting direction of the connecting rod (5).

3. An eccentric rotating grinding device according to claim 1, Features: The elastic rotating body (31) is a wasp waist type structure.

4. An eccentric rotating grinding device according to claim 3, Features: The elastic rotating body (31) is made of rubber.

5. An eccentric rotating grinding device according to claim 1, Features: The power motor (4) is a pneumatic motor.

6. An eccentric rotating grinding device according to claim 1, Features: The power motor (4) is an electric motor.

7. An eccentric rotary grinding device according to claim 1, Features: The clamping head (51) comprises a slot (51a), and a fastening hole (51b) is provided on one side of the slot (51a).

8. An eccentric rotary grinding device according to claim 1, Features: The upper end of the fixed housing (1) is also provided with a clearance groove (14), and the first mounting hole (11) and the second mounting hole (12) are respectively arranged at the front and rear ends of the bottom of the clearance groove (14).

Images