Handheld electric tool with protective cover

Abstract

The utility model discloses a handheld electric tool with a protective cover, which comprises a casing and a driving motor accommodated in the casing as a power source, the driving motor is provided with a first rotating axis, the protective cover is rotatably arranged on the casing, and a locking mechanism for locking rotation is arranged between the protective cover and the casing. The locking mechanism comprises a locking piece rotationally arranged on the machine shell and a receiving part arranged on the protective cover, a locking part matched with the receiving part is arranged on the locking piece, and the locking piece can swing relative to the machine shell around a second rotating axis on the machine shell, so that the locking part and the receiving part are matched to form locking or the locking part and the receiving part are separated to be matched for unlocking; in the use process, the protective cover is not prone to rotating relative to the machine shell, the locking piece can be shifted on the left side and the right side of the machine shell, and the use requirements of users with different habitual hands are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of electric tools, especially a kind of hand-held electric tool with protective cover. BACKGROUND

[0002] Hand-held electric tool is a kind of portable electric tool, usually using battery or other movable power supply to provide power, designed as hand-held operation, suitable for various different applications and working environment. Some of the electric tools are provided with protective cover to cover the outside of cutter to block the debris generated during operation, such as angle grinder, grinding machine, etc.

[0003] For example, the utility model patent CN202846314U discloses a protective cover assembly of angle grinder, which comprises a protective cover body. The protective cover body is an annular clamp with an opening. The opening of the clamp is provided with a fastening mechanism for adjusting the size of the opening. The two ends of the clamp are bent to form adjusting parts. The fastening mechanism comprises a screw and a nut. The screw passes through the two adjusting parts and is screwed with the nut. The protective cover body is clamped on the machine body by the annular clamp.

[0004] The protective cover is connected to the machine body of electric tool by the clamp structure. The clamp may be loosened due to the loosening between the screw and the nut, so that the protective cover may rotate relative to the machine body, which cannot form a good blocking effect. Even the protective cover may be separated from the machine body due to the loosening of the clamp. UTILITY MODEL CONTENT

[0005] Based on the above-mentioned protective cover connected to the machine body of electric tool by the clamp structure, the clamp is clamped by screw and nut. In the use process, the protective cover may rotate relative to the machine body due to the loosening between the screw and the nut, which cannot form a good protective effect. The utility model provides a hand-held electric tool with protective cover.

[0006] The utility model adopts the technical scheme that the hand-held electric tool with protective cover comprises a machine shell and a driving motor as a power source received in the machine shell. The driving motor has a first rotation axis. The machine shell is provided with a protective cover which can rotate. A locking mechanism for locking rotation is arranged between the protective cover and the machine shell. The locking mechanism comprises a locking piece rotatingly arranged on the machine shell and a receiving part arranged on the protective cover. The locking piece is provided with a locking part matched with the receiving part. The locking piece can swing relative to the machine shell around a second rotation axis on the machine shell, so that the locking part and the receiving part are matched to form locking or the locking part and the receiving part are disengaged to be unlocked. The second rotation axis is perpendicular or substantially perpendicular to the first rotation axis. The locking piece extends transversely to the left and right sides of the machine shell for external force to unlock.

[0007] A further preferred technical solution of this utility model is as follows: the locking part is a protruding locking block on the locking member, the receiving part is a locking groove provided on the top surface of the protective cover, and there are multiple locking grooves. The multiple locking grooves are evenly distributed around the rotation center of the protective cover and form at least a partial circle. The protective cover can rotate relative to the housing to change its relative position with the housing, and the locking block is engaged in a corresponding locking groove to form a lock.

[0008] A further preferred embodiment of this utility model is as follows: a return spring is provided between the locking member and the housing. The return spring is used to drive the locking member to swing towards the protective cover side so that the locking part and the receiving part can cooperate.

[0009] A further preferred technical solution of this utility model is as follows: the locking member can swing downward to a downward angled position to lock with the receiving part or swing upward to unlock. The left and right sides of the locking member are provided with a lever for the hand to swing and unlock. The lever is L-shaped and the two levers are located on the left and right sides of the housing respectively. When the locking member swings to the downward angled locking position, there is a space between the lever and the top of the protective cover for the finger to insert and lever.

[0010] A further preferred technical solution of this utility model is as follows: the locking component includes a horizontal plate and two connecting plates, the two connecting plates are respectively disposed at the left and right ends of the horizontal plate, the two connecting plates are respectively pivotally connected to the left and right sides of the housing, and the locking part is disposed in the middle of the horizontal plate.

[0011] A further preferred technical solution of this utility model is as follows: a mounting bracket for installing locking components is fixedly provided on the housing. The mounting bracket is provided with two connecting ears located on the left and right sides of the housing respectively. The two connecting plates are rotatably connected to the two connecting ears by pivots. The mounting bracket is provided with an upper positioning part extending downward. The middle part of the horizontal plate is provided with a lower positioning part opposite to the upper positioning part. The two ends of the return spring are respectively fitted onto the upper positioning part and the lower positioning part for positioning.

[0012] A further preferred embodiment of this utility model is that the connecting ear is provided with an anti-rotation part for the connecting plate to abut against.

[0013] A further preferred embodiment of this utility model is as follows: the housing includes a body shell, a handle fixed to the rear end of the body shell, and a head shell fixed to the front end of the body shell. A front cover is fixedly connected to the bottom of the head shell. The locking element is rotatably mounted on the front cover. A flange is provided on the head shell. The head shell is fixedly connected to the front side of the body shell through the flange. There is a gap between the lower part of the flange and the head shell and the front cover. The locking element swings up and down within the gap.

[0014] A further preferred embodiment of this utility model is as follows: the bottom of the front cover is provided with a protruding neck, the circumferential sidewall of the neck is provided with an annular groove, the inner side of the top of the protective cover is provided with a rim surrounding the outer side of the neck, the inner side of the rim is provided with a slider that slides in cooperation with the annular groove, the neck is fitted with a collar that surrounds and restricts the outer side of the rim, and the circumferential sidewall of the neck is provided with a connecting groove that connects the annular groove and the lower surface of the neck, the connecting groove being used for the slider to enter the annular groove.

[0015] A further preferred embodiment of this utility model is as follows: the protective cover rotates relative to the housing around a third rotation axis on the housing, the first rotation axis is perpendicular to the third rotation axis, and the first rotation axis and the third rotation axis form a plane, and the second rotation axis is perpendicular to the plane.

[0016] Compared with the prior art, the advantages of this utility model are that the protective cover is rotatably mounted on the housing, and a locking mechanism is set between the protective cover and the housing. The locking mechanism includes a locking member rotatably mounted on the housing and a receiving part mounted on the protective cover. The locking member has a locking part that cooperates with the receiving part. The locking member can swing relative to the housing around a second rotation axis on the housing. By swinging the locking member relative to the housing, the locking part cooperates with the receiving part to form a lock, thereby restricting the relative rotation between the protective cover and the housing and preventing the protective cover from rotating relative to the housing during use, thus achieving a more stable protective effect. In addition, the locking member extends laterally to the left and right sides of the housing, allowing the user to unlock the housing by swinging the locking member relative to the housing from either side. When holding the housing with the left hand, the user can use the right hand to move the locking member on the right side of the housing, and when holding the housing with the right hand, the user can use the left hand to move the locking member on the left side of the housing, which is convenient for users with different dominant hands. Attached Figure Description

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0018] Figure 1 This is a schematic diagram of the structure on the left side of the power tool;

[0019] Figure 2 This is a schematic diagram of the structure on the right side of the power tool;

[0020] Figure 3 Top view of power tools;

[0021] Figure 4 This is a diagram showing the disassembly of the protective cover and the casing;

[0022] Figure 5 This is a schematic diagram of the protective cover.

[0023] Figure 6 This is a cross-sectional diagram of the locked state.

[0024] Figure 7 This is a schematic diagram of the locking element mounted on the housing.

[0025] Figure 8 This is a schematic diagram of the locking mechanism.

[0026] Figure 9 A partial structural diagram of the unlocked state;

[0027] Figure 10 for Figure 9 A cross-sectional diagram;

[0028] Figure 11 for Figure 1 Enlarged view of a portion at point A;

[0029] Figure 12 for Figure 2 A magnified view of section B.

[0030] In the diagram: 1. Housing; 2. Handle; 3. Body housing; 4. Head housing; 5. Front cover; 6. Cutting tool; 7. Protective cover; 8. First rotation axis; 9. Third rotation axis; 10. Second rotation axis; 11. Actuating part; 12. Ring; 13. Locking part; 14. Edge; 15. Slider; 16. Receiving part; 17. Step; 18. Output shaft; 19. Neck; 20. Locking part; 21. Upper positioning part; 22. Mounting bracket; 23. Return spring; 24. Lower positioning part; 25. Flange; 26. Spacing; 27. Connecting ear; 28. Anti-rotation part; 29. ​​Annular groove; 30. Connecting groove; 31. Horizontal plate; 32. Connecting plate; 33. Space. Detailed Implementation

[0031] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0032] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0033] Figures 1-12As shown, the handheld power tool includes a housing 1, a drive motor housed inside the housing 1 as a power source, and a cutting tool 6. The drive motor has a first rotation axis 8. The cutting tool 6 is located on the front side of the housing 1 and is connected to the drive motor. The drive motor outputs rotational power to make the cutting tool 6 rotate for operation.

[0034] The housing 1 is provided with a protective cover 7 covering the outside of the cutter 6. The protective cover 7 can rotate relative to the housing 1 around the third rotation axis 9 on the housing 1. A locking mechanism for locking the rotation is provided between the protective cover 7 and the housing 1. The locking mechanism includes a locking member 13 rotatably disposed on the housing 1 and a receiving part 16 disposed on the protective cover 7. The locking member 13 is located above the protective cover 7. The locking member 13 is provided with a locking part 20 that cooperates with the receiving part 16. The locking member 13 can swing relative to the housing 1 around the second rotation axis 10 on the housing 1 so that the locking part 20 cooperates with the receiving part 16 to form a lock or the locking part 20 disengages from the receiving part 16 to unlock. The second rotation axis 10 is perpendicular or substantially perpendicular to the first rotation axis 8. The locking member 13 extends laterally to the left and right sides of the housing 1 for unlocking by external force.

[0035] This patent rotatably mounts the protective cover 7 onto the housing 1. A locking mechanism is provided between the protective cover 7 and the housing 1. The locking mechanism includes a locking member 13 rotatably mounted on the housing 1 and a receiving part 16 mounted on the protective cover 7. The locking member 13 has a locking part 20 that cooperates with the receiving part 16. The locking member 13 can swing relative to the housing 1 about a second rotation axis 10 on the housing 1. By swinging the locking member 13 relative to the housing 1, the locking part 20 cooperates with the receiving part 16 to form a lock, thereby limiting the protection. The relative rotation between the cover 7 and the housing 1 prevents the cover 7 from rotating relative to the housing 1 during use, achieving a more stable protective effect. In addition, the locking member 13 extends laterally to the left and right sides of the housing 1, allowing the user to unlock the housing 1 by swinging the locking member 13 relative to the housing 1 from either side. When holding the housing 1 with the left hand, the user can use the right hand to move the locking member 13 on the right side of the housing 1, and when holding the housing 1 with the right hand, the user can use the left hand to move the locking member 13 on the left side of the housing 1, making it convenient for users with different dominant hands.

[0036] The locking member 13 locks and unlocks by swinging up and down. When the locking member 13 swings down to a downward angled position, it engages with the receiving part 16 to lock or swings up to unlock. The left and right sides of the locking member 13 are provided with a lever part 11 for the user to swing and unlock. The two lever parts 11 are located on the left and right sides of the housing 1, respectively. When the locking member 13 swings to the downward angled locking position, there is a space 33 between the lever part 11 and the top of the protective cover 7 for the user to insert a finger. When unlocking, the user inserts a finger into the space 33 and then pushes the lever part 11 upward. The lever part 11 causes the locking member 13 to swing upward, disengaging the locking part 20 from the receiving part 16 and unlocking the device. Alternatively, the user can directly grasp the lever part 11 and push the locking member 13 upward to unlock the device.

[0037] Preferably, the toggle part 11 is L-shaped. The toggle part 11 protrudes from the left and right sides of the housing 1, making it convenient for the user to operate and unlock.

[0038] Preferably, the locking part 20 is a protruding locking block on the locking member 13, and the receiving part 16 is a locking groove provided on the top surface of the protective cover 7. There are multiple locking grooves, which are evenly distributed around the rotation center of the protective cover 7 and form a partial circle. The protective cover 7 can rotate relative to the housing 1 to change its relative position with the housing 1, and the locking block can be engaged in a corresponding locking groove to form a lock. The protective cover 7 can be rotated relative to the housing 1 to change the direction of the protective cover 7's blocking, so that it can still block the flying debris generated during operation in different working environments and positions, ensuring safety.

[0039] A return spring 23 is provided between the locking member 13 and the housing 1. The return spring 23 is used to drive the locking member 13 to swing towards the protective cover 7 so that the locking part 20 and the receiving part 16 cooperate. After the position of the protective cover 7 is adjusted and the locking member 13 is released, the return spring 23 acts on the locking member 13, causing the locking member 13 to swing towards the protective cover 7 so that the locking block cooperates with one of the opposite receiving parts 16. The return spring 23 can also limit the locking member 13 to the locked state.

[0040] The locking component 13 includes a horizontal plate 31 and two connecting plates 32. The two connecting plates 32 are respectively located at the left and right ends of the horizontal plate 31. The two connecting plates 32 are rotatably connected to the left and right sides of the housing 1 via pivots. The locking part 20 is located in the middle of the horizontal plate 31. The structure with connections at both ends makes the swinging process of the locking component 13 more stable.

[0041] Specifically, a mounting bracket 22 for mounting the locking component 13 is fixedly installed on the housing 1. The mounting bracket 22 has two connecting ears 27 located on the left and right sides of the housing 1, respectively. Two connecting plates 32 are pivotally connected to the two connecting ears 27. The mounting bracket 22 has an upper positioning part 21 extending downward, and the middle of the horizontal plate 31 has a lower positioning part 24 opposite to the upper positioning part 21. The two ends of the return spring 23 are respectively fitted onto the upper positioning part 21 and the lower positioning part 24 for positioning. The return spring 23 is located in the middle of the horizontal plate 31, so that when the return spring 23 pushes the locking component 13 downward, the force is more even, and it is not easy to tilt to one side and cause the rotation to be uneven.

[0042] The connecting ear 27 is provided with an anti-rotation part 28 for the connecting plate 32 to abut against. The anti-rotation part 28 is used to limit the maximum downward swing angle of the locking member 13, so as to prevent the locking member 13 from swinging too much when the protective cover 7 is not installed, thus affecting the installation of the protective cover 7.

[0043] The housing 1 includes a body shell 3, a handle 2 fixed to the rear end of the body shell 3, and a head shell 4 fixed to the front end of the body shell 3. The body shell 3 has a cavity for housing the drive motor. A front cover 5 is fixedly connected to the bottom of the head shell 4, forming a gear cavity between the front cover 5 and the head shell 4. A locking member 13 is rotatably mounted on the front cover 5. A flange 25 is provided on the head shell 4, and the flange 25 is fixedly connected to the front side of the body shell 3 by bolts. A gap 26 exists between the lower part of the flange 25 and the head shell 4 and the front cover 5. The locking member 13 swings up and down within the gap 26, eliminating the need for additional space 33 to accommodate the locking member 13, thus making the overall structure more compact. The front cover 5 is fixedly connected to the bottom of the head shell 4 by bolts. An output shaft 18 is installed in the gear cavity. The output shaft 18 is driven by a gear set to change direction with the motor shaft of the motor. The lower end of the output shaft 18 extends out of the front cover 5 and connects to the aforementioned cutting tool 6.

[0044] The bottom of the front cover 5 is provided with a protruding neck 19. The circumferential side wall of the neck 19 is provided with an annular groove 29. The top inner side of the protective cover 7 is provided with a rim 14 that surrounds the outside of the neck 19. The inner side of the rim 14 is provided with a slider 15 that slides in cooperation with the annular groove 29. The neck 19 is fitted with a collar 12 that surrounds and restricts the outside of the rim 14. The circumferential side wall of the neck 19 is provided with a connecting groove 30 that connects the annular groove 29 and the lower surface of the neck 19. The connecting groove 30 is used for the slider 15 to enter the annular groove 29. During installation, the collar 12 is first put on the outside of the rim 14, and then together they are put on the neck 19. During this process, the slider 15 enters the annular groove 29 from the connecting groove 30. Rotate the collar 12 and the protective cover 7 to make the slider 15 turn away from the top of the connecting groove 30, thus completing the installation of the protective cover 7.

[0045] Preferably, the protective cover 7 is semi-circular, and the rim 14 is semi-circular. This patent does not limit the shape of the protective cover 7 and the rim 14; they can also be three-quarters of a circle, two-thirds of a circle, etc.

[0046] A step 17 is provided on the neck 19 to limit the upper side of the collar 12, and the lower side of the collar 12 abuts against the top surface of the protective cover 7.

[0047] The protective cover 7 rotates relative to the housing 1 around the third rotation axis 9 on the housing 1. The third rotation axis 9 is coaxial with the output shaft 18. The first rotation axis 8 is perpendicular to the third rotation axis 9, and the first rotation axis 8 and the third rotation axis 9 form a plane. The second rotation axis 10 is perpendicular to the plane.

[0048] The above describes the handheld power tool with a protective cover provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments are only for the purpose of helping to understand this utility model and its core ideas. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A hand-held electric power tool with a protective shield, comprising a housing and a drive motor accommodated in the housing as a power source, the drive motor having a first rotational axis, characterized in that The protective cover is rotatably arranged on the casing, and a locking mechanism for locking rotation is arranged between the protective cover and the casing. The locking mechanism comprises a locking member rotatably arranged on the casing and a receiving portion arranged on the protective cover. The locking member is provided with a locking portion matched with the receiving portion. The locking member can swing relative to the casing about a second rotation axis of the casing to make the locking portion and the receiving portion matched to form locking or the locking portion and the receiving portion disengaged to be unlocked. The second rotation axis is perpendicular or substantially perpendicular to the first rotation axis. The locking member extends transversely to the left and right sides of the casing to be manually unlocked by external force.

2. The shielded hand-held power tool of claim 1, characterized in that The locking portion is a locking block protruding from the locking member. The receiving portion is a locking groove arranged on the top surface of the protective cover. The locking groove is provided with a plurality of locking grooves which are uniformly distributed around the rotation center of the protective cover and form at least a part of a circle. The protective cover can rotate relative to the casing to change the relative position with the casing and be locked by the locking block inserted into a corresponding locking groove.

3. The shielded hand-held power tool of claim 1, wherein, The locking member is provided with a reset spring arranged between the locking member and the casing. The reset spring drives the locking member to swing to one side of the protective cover to make the locking portion and the receiving portion matched.

4. The shielded hand-held power tool of claim 1, wherein, The locking member can swing downward to a slanting downward position to be locked with the receiving portion or swing upward to be unlocked. The left and right sides of the locking member are provided with a pulling portion for manually pulling the locking member to swing to be unlocked. The pulling portion is L-shaped, and the two pulling portions are respectively arranged on the left and right sides of the casing. When the locking member swings to the slanting downward locking position, the pulling portion and the top of the protective cover are provided with a space for fingers to enter and pull.

5. The shielded hand-held power tool of claim 3, wherein, The locking member comprises a horizontal plate and two connecting plates arranged at the left and right ends of the horizontal plate. The two connecting plates are respectively pivotally connected to the left and right sides of the casing. The locking portion is arranged on the middle part of the horizontal plate.

6. The shielded hand-held power tool of claim 5, characterized by The casing is fixedly provided with a mounting bracket for mounting the locking member. The mounting bracket is provided with two connecting ears respectively arranged on the left and right sides of the casing. The two connecting plates are respectively pivotally connected to the two connecting ears. The mounting bracket is provided with an upward positioning portion extending downward. The middle part of the horizontal plate is provided with a downward positioning portion opposite to the upward positioning portion. The two ends of the reset spring are respectively sleeved on the upward positioning portion and the downward positioning portion.

7. The shielded hand-held power tool of claim 6, characterized in that The connecting ear is provided with a rotation stopping portion for abutting against the connecting plate.

8. The shielded hand-held power tool of claim 1, wherein, The casing comprises a body shell, a handle fixed to the rear end of the body shell and a head shell fixed to the front end of the body shell. The bottom of the head shell is fixedly connected with a front cover. The locking member is rotatably arranged on the front cover. The head shell is fixedly connected with the front side of the body shell through a flange plate. The lower part of the flange plate has a spacing between the head shell and the front cover. The locking member swings up and down in the spacing.

9. The shielded hand-held power tool of claim 8, characterized by The bottom of the front cover is provided with a protruding neck portion. An annular groove is arranged on the circumferential sidewall of the neck portion. The top inner side of the protective cover is provided with a surrounding edge surrounding the outer side of the neck portion. An inner side of the surrounding edge is provided with a sliding block slidingly matched with the annular groove. A sleeve ring is sleeved on the neck portion and is limited outside the surrounding edge. A communication groove is arranged on the circumferential sidewall of the neck portion and communicates with the annular groove and the lower surface of the neck portion. The communication groove is used for the sliding block to enter the annular groove.

10. The shielded hand-held power tool of claim 1, wherein, The protective cover rotates relative to the casing about a third rotation axis on the casing, the first rotation axis is perpendicular to the third rotation axis, and the first rotation axis and the third rotation axis form a plane, and the second rotation axis is perpendicular to the plane.

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