Rotary electric tool and shield structure thereof

Abstract

The utility model discloses a rotary electric tool and a protective cover structure thereof. The protective cover structure comprises a cutting blade, a protective cover and a position adjusting mechanism. The cutting blade has a first axis; the protective cover is provided with a second axis, and the protective cover and the cutting blade are coaxially arranged so that the first axis and the second axis can be located on the same straight line. The position adjusting mechanism enables the protective cover to rotate relative to the second axis and to be locked at a preset position. The protective cover is movably arranged, and the protective cover can rotate and is locked at a preset position. On one hand, mutual interference between the protective cover and a narrow or complex area can be avoided, and therefore the grinding or cutting angle and depth can be flexibly adjusted; and on the other hand, the operator can keep a comfortable holding posture, and hand muscle fatigue and aching pain of the operator caused by holding the angle grinder for a long time are avoided, so that the working efficiency and the operation continuity are guaranteed.

Description

Technical Field

[0001] This utility model generally relates to the field of angle grinder technology, and more particularly to a rotary power tool and its protective cover structure. Background Technology

[0002] In the field of power tools, power tools such as angle grinders are widely used in the construction and decoration industry and other industrial fields. Taking angle grinders as an example, this type of power tool has an internal motor to drive the cutting blade to rotate, and also has an internal push-button switch connected to the motor to start or stop the motor. Angle grinders have a very wide range of applications and many uses. They are often used to cut, grind, and brush metal and non-metal objects, such as common steel, steel plates, wood, tiles, stone, plastic sheets, etc. They are common and frequently used tools in people's lives.

[0003] When using an angle grinder, the protective cover of some angle grinders is fixed and cannot be adjusted, thus failing to meet different work requirements. Utility Model Content

[0004] This application aims to provide a rotary power tool and its protective cover structure, at least to solve the problem of adjusting the position of the protective cover according to actual usage needs.

[0005] This utility model provides a protective cover structure, including a cutting plate, a protective cover, and a position adjustment mechanism.

[0006] The cutting blade has a first axis; the protective cover has a second axis, and the protective cover is coaxially arranged with the cutting blade so that the first axis and the second axis are on the same straight line.

[0007] The position adjustment mechanism enables the protective cover to rotate relative to the second axis and lock in a preset position.

[0008] As an implementation method, the position adjustment mechanism includes an elastic buckle and a locking member. The elastic buckle has a first position and a second position. In the first position, the elastic buckle is disengaged from the locking member so that the protective cover can rotate relative to the second axis. In the second position, the elastic buckle is locked to the locking member so that the protective cover is locked in the preset position.

[0009] In one possible implementation, the elastic fastener includes a fastening post, a torsion spring, a pin, and a button. The fastening post has a first position and a second position. The button has a first mounting hole and a second mounting hole. The fastening post passes through the second mounting hole, and the end of the fastening post protrudes from the second mounting hole. The pin, on which the torsion spring is sleeved, is mounted in the first mounting hole. The button allows the fastening post to switch between the first position and the second position.

[0010] As an implementation method, the first mounting hole has a hollow area in the middle to form a first limiting area and a second limiting area with an interval, and the torsion spring is located between the first limiting area and the second limiting area.

[0011] As an alternative implementation, the locking element is a snap-fit ​​groove adapted to the snap-fit ​​post.

[0012] As an alternative implementation, a housing is also included, comprising a first portion and a second portion, wherein the length extension direction of the first portion is parallel to the length extension direction of either the first axis or the second axis, and the length extension direction of the second portion is perpendicular to the length extension direction of the first portion.

[0013] The buckle post is connected to the outside of the second part or the outside of the first part. The surface of the protective cover near the end of the buckle post is provided with a plurality of buckle grooves, which are arranged around the second axis.

[0014] As an implementation method, the protective cover is further provided with a connecting groove on the surface near the end of the buckle post. The connecting groove is arc-shaped and connects each of the buckle slots. In the first position, the buckle post is located in the connecting groove.

[0015] As an alternative implementation, the sidewall of the snap-fit ​​groove and the sidewall of the connecting groove are smoothly connected at the joint.

[0016] As one possible implementation, the protective cover is arranged in a fan shape.

[0017] This utility model also provides a rotary power tool, including the aforementioned protective cover structure.

[0018] The above solution utilizes a position adjustment mechanism to allow the protective cover to rotate relative to the second axis and lock in a preset position. The protective cover is movable, allowing it to rotate and lock in the preset position. This design prevents interference between the protective cover and narrow or complex areas, enabling flexible adjustment of grinding or cutting angles and depths. Furthermore, it allows the operator to maintain a comfortable grip, preventing hand muscle fatigue and soreness caused by prolonged holding of the angle grinder, thus ensuring work efficiency and operational continuity. Attached Figure Description

[0019] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of a protective cover structure provided in an embodiment of the present utility model;

[0021] Figure 2 An explosion diagram of a protective shield structure provided for an embodiment of this utility model. Figure 1 ;

[0022] Figure 3 An explosion diagram of a protective shield structure provided for an embodiment of this utility model. Figure 2 ;

[0023] Figure 4 A schematic diagram of the internal structure of a protective cover structure provided in an embodiment of this utility model. Figure 1 ;

[0024] Figure 5 A schematic diagram of the internal structure of a protective cover structure provided in an embodiment of this utility model. Figure 2 ;

[0025] Figure 6 This is a schematic diagram of the structure of the elastic buckle provided in the embodiment of the present utility model;

[0026] 10, helical gear mechanism, 11, gear disk, 12, power output shaft, and 13;

[0027] Elastic buckle 20, button 21, first mounting hole 211, first limiting area 2111, second limiting area 2112, second mounting hole 212, buckle post 22, pin 23, torsion spring 24;

[0028] Protective cover 30, locking fastener 31, buckle groove ag, connecting groove 32, cutting disc 40, machine housing 50, first part 51, second part 52. Detailed Implementation

[0029] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] Rotary power tools include angle grinders, polishers, cutters, and abrasive grinders. Angle grinders are used for grinding, cutting, and polishing materials such as metal, stone, and wood; polishers are used for surface polishing, such as on automobiles, metals, and stone; cutters are used for cutting metal, stone, and tiles; and abrasive grinders are used for grinding, deburring, and finishing metal workpieces.

[0032] The following examples use an angle grinder for illustration:

[0033] The angle grinder includes a grinding wheel and a protective cover 30. The grinding wheel is installed inside the protective cover 30, with a portion of the grinding wheel protruding from the cover. In practical applications, when the operator holds the angle grinder to cut a workpiece, such as steel, steel plate, wood, tile, stone, or plastic sheet, sparks or debris will fly when the grinding wheel contacts the workpiece. The protective cover 30 effectively prevents sparks or debris from flying during grinding, enhancing operational safety.

[0034] However, when the angle grinder is working in a narrow or complex area, the fixed protective cover 30 interferes with the narrow or complex area. Because the grinding (or cutting) angle and depth cannot be flexibly adjusted, it brings inconvenience to the grinding or cutting work. At the same time, holding the angle grinder for a long time will cause muscle fatigue and soreness in the operator's hands, affecting work efficiency and the continuity of operation.

[0035] Therefore, to address the aforementioned problems, this utility model proposes a protective cover structure. The protective cover 30 of the angle grinder is movably configured, allowing it to rotate and lock in a preset position. This design, on the one hand, prevents the protective cover 30 from interfering with narrow or complex areas, thus enabling flexible adjustment of the grinding or cutting angle and depth; on the other hand, it allows the operator to maintain a comfortable grip, preventing hand muscle fatigue and soreness caused by prolonged holding of the angle grinder, thereby ensuring work efficiency and operational continuity.

[0036] The following is at least in conjunction with the accompanying drawings. Figures 1-6 The angle grinder is further described as follows: The angle grinder includes a protective cover structure. The protective cover structure includes: a cutting disc 40, a protective cover 30, a position adjustment mechanism, a housing 50, and a helical gear mechanism 10. The cutting disc 40 can be a grinding wheel, a cutting wheel, a polishing wheel, etc.

[0037] The following examples use cutting disc 40 as the grinding wheel for illustration:

[0038] like Figure 2 and Figure 3 As shown, the housing 50 includes a first part 51 and a second part 52. The first part 51 has a first cavity, and the second part 52 has a second cavity, which communicates with the first cavity. Figure 4As shown, the helical gear mechanism 10 includes a gear disc 12, a helical gear 11, and a power output shaft 13 coaxially arranged with the gear disc 12. The helical gear 11 meshes with the gear disc 12, and the axis of the helical gear 11 is perpendicular to the axis of the gear disc 12. The helical gear 11 is located in the second cavity, and the gear disc 12 is located in the first cavity. The gear disc 12 and the helical gear 11 cooperate to drive the power output shaft 13 to rotate. The gear disc 12 is sleeved on the power output shaft 13, and a grinding wheel is sleeved on one end of the power output shaft 13. This arrangement enables the grinding wheel to rotate.

[0039] like Figure 2 and Figure 3 As shown, the protective cover 30 is fan-shaped and has a second axis; the grinding wheel has a first axis, and the protective cover 30 is coaxially arranged with the grinding wheel so that the first axis and the second axis are on the same straight line. A position adjustment mechanism allows the protective cover 30 to rotate relative to the second axis and lock in a preset position. Specifically, the length extension direction of the first part 51 is parallel to the extension direction of either the first or second axis, and the length extension direction of the second part 52 is perpendicular to the length extension direction of the first part 51.

[0040] The position adjustment mechanism is a unidirectional intermittent motion mechanism. This means the grinding wheel rotates clockwise or counterclockwise, pauses for a period after each rotation, and then resumes rotation. This motion allows the protective cover 30 to rotate intermittently and lock into a preset position. The position adjustment mechanism can be a ratchet mechanism, a Geneva wheel mechanism, an incomplete gear mechanism, etc.

[0041] In one specific embodiment, the position adjustment mechanism includes an elastic buckle 20 and a locking buckle 31. The elastic buckle 20 includes a first position and a second position. In the first position, the elastic buckle 20 is disengaged from the locking buckle 31 so that the protective cover 30 can rotate relative to the second axis. In the second position, the elastic buckle 20 is locked to the locking buckle 31 so that the protective cover 30 is locked in a preset position.

[0042] In detail, such as Figure 5 and Figure 6 As shown, the elastic buckle 20 includes a buckle post 22, a torsion spring 24, a pin 23, and a button 21. The buckle post 22 has a first position and a second position. The length extension direction of the buckle post 22 is parallel to the length extension direction of the first part 51, and the buckle post 22 is located on the outside of the first part 51. The upper end of the buckle post 22 is fixedly connected to the second part 52. Of course, it can be understood that the buckle post 22 can also be connected to the first part 51 or other suitable positions, and this embodiment does not limit this.

[0043] The button 21 has a first mounting hole 211 and a second mounting hole 212. A latching post 22 passes through the second mounting hole 212, and its lower end protrudes from the second mounting hole 212. A pin 23, fitted with a torsion spring 24, is installed in the first mounting hole 211. The first mounting hole 211 has a hollowed-out area in the middle to form a first limiting area 2111 and a second limiting area 2112 spaced apart. The torsion spring 24 is located between the first limiting area 2111 and the second limiting area 2112. Figure 6 As shown, this restricts the degree of freedom of the torsion spring 24 in the vertical direction, thereby ensuring that the torsion spring 24 is stably fitted onto the pin 23.

[0044] The locking element 31 is a locking groove adapted to the locking post 22. The surface of the protective cover 30 near the lower end of the locking post 22 has multiple locking grooves, which are arranged around the second axis. For example, as... Figure 3 and Figure 5 As shown, the protective cover 30 includes a cover surface and a cover side. The cover surface is fan-shaped, and the cover side is arc-shaped. The cover side is connected to the cover surface. Near the lower end of the cover surface close to the fastening post 22, multiple fastening grooves are recessed on the cover surface: fastening groove ag, which are arranged at equal intervals around the second axis.

[0045] like Figure 5 As shown, when the torsion spring 24 is not driven by an external force, the latching post 22 is in the second position, that is, the latching post 22 is located in the latching groove d, and the latching post 22 engages with the latching groove d to lock the protective cover 30 and prevent the protective cover 30 from rotating. When the operator presses the button 21, the torsion spring 24 is driven by an external force, causing the latching post 22 to switch from the second position to the first position. The latching post 22 is in the first position, that is, the latching post 22 is disengaged from the aforementioned latching groove d, thereby allowing the protective cover 30 to rotate. When the protective cover 30 rotates to a suitable position, that is, when the protective cover 30 does not interfere with narrow or complex areas, or when the operator can maintain a comfortable grip, and the operator does not press the button 21 at the current moment, the latching post 22 switches from the first position to the second position under the action of the torsion spring 24, and the latching post 22 engages with another corresponding latching groove (e.g., latching groove b) again.

[0046] As an implementation method, the protective cover 30 is also provided with a connecting groove 32 on the surface near the end of the buckle post 22. The connecting groove 32 is arc-shaped and connects each buckle groove. In the first position, the buckle post 22 is located in the connecting groove 32.

[0047] like Figure 3 and Figure 5As shown, a connecting groove 32 is also provided on the surface of the cover. The connecting groove 32 is arc-shaped and connects to the buckle groove ag. The axis corresponding to the connecting groove 32 is on the same straight line as the second axis. The depth of the connecting groove 32 is equal to the depth of the buckle groove. When the buckle post 22 switches from the second position to the first position, the buckle post 22 is in the first position and is currently located within the connecting groove 32. The connecting groove 32 has a limiting effect on the buckle post 22, preventing the force of the torsion spring 24 from being too large or too small. At the same time, the connecting groove 32 helps the buckle post 22 to be stably maintained in the first position.

[0048] As an implementation method, the sidewall of the snap-fit ​​groove and the sidewall of the connecting groove 32 are smoothly connected.

[0049] like Figure 5 As shown, the sidewalls of the snap-fit ​​groove a, b, c, d, e, and f smoothly transition from the sidewalls of the connecting groove 32 to the sidewalls of the snap-fit ​​groove 32. This design facilitates the smooth transition of the snap-fit ​​post 22 from the first position to the second position, preventing it from accidentally getting stuck in the first position.

[0050] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used above to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0051] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A protective cover structure, characterized in that, include: A cutting blade (40) having a first axis; A protective cover (30) having a second axis, the protective cover (30) being coaxially arranged with the cutting blade (40) so that the first axis and the second axis are on the same straight line; A position adjustment mechanism that enables the protective cover (30) to rotate relative to the second axis and lock in a preset position.

2. The protective cover structure according to claim 1, characterized in that, The position adjustment mechanism includes an elastic buckle (20) and a locking buckle (31). The elastic buckle (20) has a first position and a second position. In the first position, the elastic buckle (20) is disengaged from the locking buckle (31) so that the protective cover (30) can rotate relative to the second axis. In the second position, the elastic buckle (20) is locked to the locking buckle (31) so that the protective cover (30) is locked in the preset position.

3. The protective cover structure according to claim 2, characterized in that, The elastic buckle (20) includes a buckle post (22), a torsion spring (24), a pin (23), and a button (21). The buckle post (22) includes a first position and a second position. The button (21) has a first mounting hole (211) and a second mounting hole (212). The latching post (22) passes through the second mounting hole (212) and the end of the latching post (22) protrudes from the second mounting hole (212). The pin (23) on which the torsion spring (24) is sleeved is installed in the first mounting hole (211). The button (21) is used to switch the latching post (22) between the first position and the second position.

4. The protective cover structure according to claim 3, characterized in that, The first mounting hole (211) has a hollow area in the middle to form a first limiting area (2111) and a second limiting area (2112) with intervals, and the torsion spring (24) is located between the first limiting area (2111) and the second limiting area (2112).

5. The protective cover structure according to claim 3, characterized in that, The locking element (31) is a locking groove that is adapted to the locking post (22).

6. The protective cover structure according to claim 5, characterized in that, It also includes a housing (50), which comprises a first part (51) and a second part (52). The length extension direction of the first part (51) is parallel to the length extension direction of the first axis or the second axis, and the length extension direction of the second part (52) is perpendicular to the length extension direction of the first part (51). The buckle post (22) is connected to the outside of the second part (52) or the outside of the first part (51). The protective cover (30) has a plurality of buckle grooves on the surface near the end of the buckle post (22). The plurality of buckle grooves are arranged around the second axis.

7. The protective cover structure according to claim 6, characterized in that, The protective cover (30) is further provided with a connecting groove (32) on the surface near the end of the buckle post (22). The connecting groove (32) is arc-shaped and connects each of the buckle grooves. In the first position, the buckle post (22) is located within the connecting groove (32).

8. The protective cover structure according to claim 7, characterized in that, The sidewall of the buckle groove and the sidewall of the connecting groove (32) are smoothly connected.

9. The protective cover structure according to any one of claims 1-8, characterized in that, The protective cover (30) is arranged in a fan shape.

10. A rotary power tool, characterized in that, The protective structure includes any one of claims 1-9.

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