Angle grinder convenient to clean
By modifying the connecting structure of the angle grinder and the output shaft, using limit structure and lubricating oil, the problem of difficulty in cleaning the angle grinder is solved, and a more convenient disassembly and lubrication effect is achieved.
Patent Information
- Application Number
- CN202323469652.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-19
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2033-12-19
AI Technical Summary
After long-term use of existing angle grinders, the grinding wheel and protective cover are prone to jamming, which makes it difficult to clean, especially the gland and screws are prone to jamming and difficult to disassemble.
A corner grinder is designed for easy cleaning. By modifying the connection structure between the gland and the output shaft, it is directly connected, and is fixed with a limit structure and elastic gasket to ensure that the bolts do not get stuck and at the limit. Pour lubricant into the groove to reduce loosening resistance.
It can still be easily and quickly disassembled when the grinding wheel is deformed or broken, reducing the difficulty of cleaning, and reducing the bolt loosening resistance through lubricating oil, improving the disassembly efficiency.
Smart Images
Figure CN222200015U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of angle grinders, and in particular to an angle grinder that is easy to clean. Background Art
[0002] An angle grinder is an electric tool that uses a high-speed rotating thin grinding wheel to cut and grind hard materials such as metal and stone. When in use, in order to prevent the flying of cutting or grinding debris and to prevent the operator from being cut by the grinding wheel, the angle grinder will be equipped with a nearly semicircular protective cover around the grinding wheel.
[0003] After long-term use, debris is easily stuck between the grinding wheel and the protective cover, so the grinding wheel and the protective cover need to be removed and cleaned regularly. In order to facilitate cleaning, the protective cover will be installed on the body of the angle grinder by means of a clamp. In addition, a motor for driving the grinding wheel to rotate is provided in the body. The output shaft of the motor is fixed with a screw. The grinding wheel is sleeved on the screw and is pressed and fixed on the output shaft by a gland connected to the screw thread. The existing body is also provided with a shaft lock button. By pressing the shaft lock button, the gland or the grinding wheel can be rotated by a tool to remove the grinding wheel.
[0004] However, angle grinders generally cut hard objects, which makes it easy for the grinding wheel to deform or break directly, resulting in the gland and the screw being easily stuck. It is also difficult to remove the grinding wheel using tools, which increases the difficulty of cleaning the angle grinder. Utility Model Content
[0005] The present invention provides an angle grinder that is easy to clean, so as to at least solve the above technical problems existing in the prior art, and can smoothly disassemble a stuck grinding wheel to better clean the angle grinder.
[0006] To achieve the above objectives, the present disclosure adopts the following technical solutions:
[0007] An angle grinder that is easy to clean, comprising a casing and a driving member arranged in the casing; the driving member has a rotating output shaft, a grinding wheel and a pressure cover are sleeved on the output shaft, the pressure cover comprises a lower cover abutting the grinding wheel and an upper cover tightly abutting the lower cover, a limiting structure for limiting the rotation of the upper cover relative to the output shaft is arranged between the upper cover and the output shaft; a protective cover for protecting the grinding wheel is detachably connected to the casing.
[0008] In one possible embodiment, a connecting hole for the output shaft to pass through is formed on the upper cover, the limiting structure includes a plurality of bolts and a limiting member arranged on the inner wall of the connecting hole, a limiting groove for the limiting member to slide is formed on the side wall of the output shaft, the limiting groove has an entry section and a tightening section that are connected to each other, the entry section is arranged along the axial direction of the output shaft, the tightening section is arranged along the circumferential direction of the output shaft, and the upper cover has threaded holes in an array along the circumferential direction for the bolts to be threadedly connected and pass through the upper cover and then abut against the lower cover.
[0009] In one possible implementation manner, the limiting groove further has a limiting section connected to one end of the abutting section away from the entry section, and the limiting section is connected to the inner wall of the abutting section away from the lower cover and is arranged along the axial direction of the output shaft.
[0010] In one embodiment, the number of the limiting grooves is two and they are symmetrically opened on the side wall of the output shaft along the axial center plane of the output shaft, and the number of the limiting members is also two and they are arranged on the upper cover at positions corresponding to the limiting grooves.
[0011] In one possible implementation manner, an oil inlet passage communicating with the limiting groove and the threaded hole is provided in the upper cover.
[0012] In one embodiment, an elastic gasket is provided between the upper cover and the lower cover.
[0013] In one possible implementation manner, a thickened portion is protrudingly provided on a surface of the gasket facing the upper cover at a position corresponding to each of the bolts, and the bolts are tightened against the thickened portion after passing through the upper cover.
[0014] In one possible implementation manner, the diameter of the thickened portion is greater than the diameter of the bolt, and a recessed groove for the end of the bolt to fit into is formed on a side of the thickened portion facing the upper cover.
[0015] In one possible implementation manner, a raised anti-slip portion is provided on a surface of the lower cover facing away from the upper cover.
[0016] In summary, the present disclosure includes at least one of the following beneficial effects:
[0017] 1. The existing structure of the threaded connection between the gland and the output shaft is modified to a direct sleeve connection. First, the lower cover is sleeved on the output shaft and abutted against the grinding wheel. Then, the limiter of the upper cover is aligned with the limiter groove and slid into it. Then, the upper cover is rotated to make the limiter enter the tight section. Finally, the bolt is threaded and penetrated with a threaded hole. The bolt presses the limiter in the limit section through a gasket, thereby fixing the entire gland and the grinding wheel on the output shaft. Even if the grinding wheel is deformed during use, the bolt will not be stuck, and disassembly is more convenient and quick.
[0018] 2. Pour the lubricating oil into the limit groove through the inlet section. The lubricating oil will enter the threaded hole through the oil inlet channel, thereby reducing the resistance when loosening the bolt and making it more time-saving and labor-saving to disassemble the grinding wheel.
[0019] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, in which:
[0021] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.
[0022] Figure 1 A schematic structural diagram of an angle grinder that is easy to clean according to an embodiment of the present disclosure is shown;
[0023] Figure 2 A schematic diagram showing the structure of the installation of the driving member and the output shaft according to the embodiment of the present disclosure is shown;
[0024] Figure 3 A schematic diagram of the structure of the output shaft and the upper cover connected in the embodiment of the present disclosure is shown;
[0025] Figure 4 An exploded view showing the connection between the output shaft and the upper cover in the embodiment of the present disclosure is shown;
[0026] Figure 5 A cross-sectional view showing the connection between the output shaft and the upper cover in an embodiment of the present disclosure is shown.
[0027] Explanation of the numbers in the figure: 1. Casing; 2. Driving part; 3. Output shaft; 31. Limiting groove; 311. Entry section; 312. Tightening section; 313. Limiting section; 4. Grinding wheel; 5. Pressure cover; 51. Lower cover; 511. Anti-slip part; 52. Upper cover; 521. Connecting hole; 522. Threaded hole; 523. Oil inlet channel; 6. Limiting structure; 61. Bolt; 62. Limiting part; 7. Gasket; 71. Thickened part; 72. Sink; 8. Protective cover; 9. Hoop. DETAILED DESCRIPTION
[0028] In order to make the purpose, features, and advantages of the present disclosure more obvious and easy to understand, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.
[0029] The following is combined with Figure 1-5 The present disclosure is described in further detail.
[0030] Reference Figure 1 The embodiment of the present disclosure provides an angle grinder that is easy to clean, including a housing 1 and a driving member 2 disposed in the housing 1; the driving member 2 has a rotating output shaft 3, a grinding wheel 4 and a pressure cover 5 are sleeved on the output shaft 3, the pressure cover 5 includes a lower cover 51 abutting against the grinding wheel 4 and an upper cover 52 abutting against the lower cover 51, and a limiting structure 6 is provided between the upper cover 52 and the output shaft 3 to limit the rotation of the upper cover 52 relative to the output shaft 3; a protective cover 8 for protecting the grinding wheel 4 is detachably connected to the housing 1. The existing structure of the pressure cover 5 being threadedly connected to the output shaft 3 is modified to be directly sleeved, the lower cover 51 is first sleeved on the output shaft 3 and abutted against the grinding wheel 4, and then the upper cover 52 is sleeved and fixed on the output shaft 3 through the limiting structure 6, so that the entire pressure cover 5 and the grinding wheel 4 are fixed on the output shaft 3, even if the grinding wheel 4 is deformed during use, the bolt 61 will not be stuck, and the disassembly is more convenient and quick, so that it is more convenient to clean the angle grinder.
[0031] Reference Figure 2 The driving member 2 is installed at one end of the housing. The driving member 2 may include a rotor and a stator for driving the rotor to rotate. The output end of the stator is connected to the output shaft 3 through a helical gear assembly, thereby driving the output shaft 3 to rotate at high speed. The material of the output shaft 3 is a metal with relatively high hardness, and preferably 40CR alloy structural steel. The output shaft 3 passes through the housing, and a connection cover is fixed on the housing. The output shaft 3 passes through the connection cover. A bearing is connected between the output shaft 3 and the connection cover. The protective cover 8 has a semicircular connection portion, which abuts against the outer surface of the connection cover. A clamp 9 for fixing the two is connected between the connection portion and the connection cover. When there are fewer debris between the grinding wheel 4 and the protective cover 8, the clamp 9 only needs to be unlocked to remove the protective cover 8 for cleaning, which is convenient and quick.
[0032] The material of the upper cover 52 and the lower cover 51 is preferably No. 45 carbon structural steel, and the upper cover 52 and the lower cover 51 can be formed separately by a casting method.
[0033] Reference Figure 3 and Figure 4The lower cover 51 is annular, and a raised anti-skid portion 511 is provided on one side of the lower cover 51 away from the upper cover 52. The anti-skid portion 511 may be an anti-skid pattern arrayed along the circumference of the lower cover 51. Because the lower cover 51 is pressed and fixed on the grinding wheel 4 instead of being fixed by a threaded rotation connection, the anti-skid portion 511 will not wear the surface of the grinding wheel 4 during installation. The anti-skid portion 511 can reduce the possibility of relative rotation between the pressure cover 5 and the grinding wheel 4, thereby improving the stability of the connection structure.
[0034] Reference Figure 4 and Figure 5 Specifically, the upper cover 52 is provided with a connection hole 521 for the output shaft 3 to pass through, the inner diameter of the connection hole 521 is consistent with the outer diameter of the output shaft 3, the limiting structure 6 includes a plurality of bolts 61 and a limiting member 62 arranged on the inner wall of the connection hole 521, the limiting member 62 is a limiting member 62 protruding from the inner wall of the connection hole 521, and the limiting member 62 is integrally cast with the upper cover 52. The side wall of the output shaft 3 is provided with a limiting groove 31 for the limiting member 62 to slide when the upper cover 52 is sleeved on the output shaft 3, the limiting groove 31 has a connected entry section 311 and a tight section 312, the entry section 311 is arranged along the axial direction of the output shaft 3, and the tight section 312 is arranged along the circumferential direction of the output shaft 3, the upper cover 52 has a circumferential array of threaded holes 522 for the bolts 61 to be threadedly connected and pass through the upper cover 52 to abut on the lower cover 51, the number of the threaded holes 522 is preferably four, and correspondingly, the number of the bolts 61 is four. During installation, first, the lower cover 51 is sleeved on the output shaft 3 and abutted against the grinding wheel 4, then the limiting piece 62 of the upper cover 52 is slid to the entry section 311 to the bottom of the entry section 311, and then the upper cover 52 is rotated to make the limiting piece 62 enter the tightening section 312, and finally the bolt 61 is threadedly connected and passed through the threaded hole 522, and the end of the bolt 61 is pressed against the lower cover 51, so that the limiting piece 62 of the upper cover 52 is pressed against the tightening section 312, thereby fixing the entire pressure cover 5 and the grinding wheel 4 on the output shaft 3, even if the grinding wheel 4 is deformed or broken, the bolt 61 will not be stuck, and disassembly and cleaning are more convenient and quick.
[0035] Further, see Figure 4 The limiting groove 31 also has a limiting section 313 connected to the end of the pressing section 312 away from the entry section 311. The limiting section 313 is connected to the inner wall of the pressing section 312 away from the lower cover 51 and is arranged along the axial direction of the output shaft 3. The length of the limiting section 313 is not less than the width of the limiting member 62. The lower cover 51 and the upper cover 52 are sequentially sleeved on the output shaft 3. After the bolt 61 is tightened, the limiting member 62 will enter the limiting section 313 and press against the inner wall of the limiting section 313 away from the limiting section 313, so that while fixing the upper cover 52 and the lower cover 51, the upper cover 52 can also be limited from rotating relative to the output shaft 3, thereby improving the stability of the connection structure between the pressure cover 5 and the output shaft 3, and further fixing the grinding wheel 4.
[0036] In one embodiment, the number of the limiting groove 31 can be one. In this embodiment, in order to reduce the possibility of the upper cover 52 tilting relative to the lower cover 51, refer to Figure 4 There are two limit grooves 31 and they are symmetrically arranged on the side wall of the output shaft 3 along the axial center plane of the output shaft 3. There are also two limit members 62 and they are arranged on the upper cover 52 at positions corresponding to the limit grooves 31, so that after tightening the bolts 61, the upper cover 52 and the lower cover 51 remain parallel to each other, thereby improving the connection stability. Moreover, it can effectively prevent the bolts 61 from getting stuck.
[0037] Furthermore, an elastic gasket 7 is provided between the upper cover 52 and the lower cover 51. The material of the gasket 7 can be rubber or sponge, preferably rubber with sealing properties, so as to avoid the possibility of a gap between the upper cover 52 and the lower cover 51, and further improve the stability of the connection structure. Moreover, a thickened portion 71 is provided on the side of the gasket 7 facing the upper cover 52 corresponding to the position of each bolt 61. After the bolt 61 passes through the upper cover 52, it is pressed against the thickened portion 71, which can make the bolt 61 connection tighter. Furthermore, the diameter of the thickened portion 71 is larger than the diameter of the bolt 61, and a recessed groove 72 for the end of the bolt 61 to fit and insert is provided on the side of the thickened portion 71 facing the upper cover 52, so as to limit the occurrence of the displacement of the bolt 61.
[0038] Further, in order to make the removal of the grinding wheel 4 more time-saving and labor-saving, refer to Figure 5 The upper cover 52 is also provided with an oil inlet channel 523 connected to the limit groove 31 and the threaded hole 522. The number of the oil inlet channels 523 is the same as the number of the threaded holes 522. Accordingly, each oil inlet channel 523 is connected to the oil inlet channel 523 closest to each threaded hole 522. When the lubricating oil is poured into the limit groove 31 through the inlet section 311, the lubricating oil will enter the threaded hole 522 through the oil inlet channel 523, thereby reducing the resistance when loosening the bolt 61 and further preventing the bolt 61 from getting stuck.
[0039] The implementation principle of the angle grinder disclosed in the present invention that is easy to clean is as follows:
[0040] The structure of the existing threaded connection between the pressure cover 5 and the output shaft 3 is modified to be directly sleeved. First, the lower cover 51 is sleeved on the output shaft 3 and abutted against the grinding wheel 4. Then, the limit piece 62 of the upper cover 52 is aligned with the entry section 311 and slides into the bottom of the entry section 311. The upper cover 52 is rotated to make the limit piece 62 enter the end of the tightening section 312. Finally, the bolt 61 is threaded and passed through the threaded hole 522. The end of the bolt 61 is pressed against the lower cover 51 through the gasket 7, so that the limit piece 62 of the upper cover 52 is pressed against the limit section 313, thereby fixing the entire pressure cover 5 and the grinding wheel 4 on the output shaft 3. Even if the grinding wheel 4 is deformed or broken, the bolt 61 will not be stuck. Lubricating oil can also be poured into the threaded hole 522 through the limit groove 31, and disassembly and cleaning are more convenient and quick.
[0041] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this disclosure can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions disclosed in this disclosure can be achieved, and this document does not limit this.
[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0043] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.
Claims
1. An angle grinder that is easy to clean, comprising a housing (1) and a driving member (2) arranged in the housing (1), characterized in that: The driving member (2) has a rotatable output shaft (3), a grinding wheel (4) and a pressure cover (5) are sleeved on the output shaft (3), the pressure cover (5) comprises a lower cover (51) abutting against the grinding wheel (4) and an upper cover (52) abutting against the lower cover (51), and a limiting structure (6) is provided between the upper cover (52) and the output shaft (3) to limit the rotation of the upper cover (52) relative to the output shaft (3); a protective cover (8) for protecting the grinding wheel (4) is detachably connected to the housing (1).
2. The angle grinder that is easy to clean according to claim 1, characterized in that: The upper cover (52) is provided with a connection hole (521) for the output shaft (3) to pass through, the limiting structure (6) comprises a plurality of bolts (61) and a limiting member (62) arranged on the inner wall of the connection hole (521), the side wall of the output shaft (3) is provided with a limiting groove (31) for the limiting member (62) to slide, the limiting groove (31) has an entry section (311) and a tightening section (312) which are connected to each other, the entry section (311) is arranged along the axial direction of the output shaft (3), and the tightening section (312) is arranged along the circumferential direction of the output shaft (3), and the upper cover (52) has a circumferential array of threaded holes (522) for the bolts (61) to be threadedly connected and to pass through the upper cover (52) and then abut against the lower cover (51).
3. The angle grinder that is easy to clean according to claim 2, characterized in that: The limiting groove (31) further comprises a limiting section (313) connected to one end of the abutting section (312) away from the entry section (311); the limiting section (313) is connected to the inner wall of the abutting section (312) away from the lower cover (51) and is arranged along the axial direction of the output shaft (3).
4. An angle grinder that is easy to clean according to claim 2 or 3, characterized in that: The number of the limiting grooves (31) is two and they are symmetrically arranged on the side wall of the output shaft (3) along the axial center plane of the output shaft (3); the number of the limiting members (62) is also two and they are arranged on the upper cover (52) at positions corresponding to the position of the limiting grooves (31).
5. The angle grinder that is easy to clean according to claim 2, characterized in that: An oil inlet passage (523) communicating with the limiting groove (31) and the threaded hole (522) is provided in the upper cover (52).
6. The angle grinder that is easy to clean according to claim 2, characterized in that: An elastic gasket (7) is provided between the upper cover (52) and the lower cover (51).
7. The angle grinder that is easy to clean according to claim 6, characterized in that: A thickened portion (71) is protrudingly provided on one side of the gasket (7) facing the upper cover (52) at a position corresponding to each of the bolts (61), and the bolts (61) are tightly pressed against the thickened portion (71) after passing through the upper cover (52).
8. The angle grinder that is easy to clean according to claim 7, characterized in that: The diameter of the thickened portion (71) is greater than the diameter of the bolt (61), and a recessed groove (72) for the end of the bolt (61) to be inserted into is provided on a side of the thickened portion (71) facing the upper cover (52).
9. The easy-to-clean angle grinder according to claim 1, characterized in that: A raised anti-slip portion (511) is provided on a side of the lower cover (51) facing away from the upper cover (52).