Hand-held power tool with rotary handle

Abstract

The handheld electric tool comprises a machine shell, the handle, a working head, a power mechanism and a locking mechanism, a cylindrical connecting part is arranged on the machine shell, an annular rail groove is formed in the connecting part, the handle is provided with an opening allowing the connecting part to be inserted in, an inner ring edge in sliding fit with the annular rail groove is arranged on the inner wall of the handle, and the locking mechanism is arranged on the inner wall of the handle. The locking mechanism is used for locking relative rotation of the handle and the machine shell, the power mechanism is contained in the machine shell, the working head is connected with the power mechanism, at least one tensioning mechanism is arranged between the connecting part and the handle, and each tensioning mechanism comprises a jacking piece and a first elastic piece acting on the jacking piece to provide elastic supporting force. The back shore piece and the first elastic piece are supported between the handle and the connecting part, so that the rotating connecting position of the handle and the connecting part is in a tensioning state, a shaking gap is eliminated, shaking caused by the handle in the using process of a user is relieved, and the using safety of the machine and the user experience feeling are improved.

Description

Technical Field

[0001] The invention relates to an electric tool, in particular to a handheld electric tool with a rotating handle. Background Art

[0002] With the development of society and the advancement of science and technology, the demand for handheld power tools such as angle grinders, hedge trimmers, slotters, etc. is increasing, and their uses are becoming more and more extensive. In order to facilitate operation, the handles of some handheld power tools can be rotated and adjusted relative to the body, which greatly facilitates the use of handheld power tools at different workstations or different angles.

[0003] For example, patent CN209504031U discloses a rotation interlocking mechanism for the handle of an electric tool, which includes a body and a handle. The handle is rotatably arranged on the body through a locking mechanism. The locking mechanism includes a horizontal push button slidably arranged on the handle, and a return spring installed between the handle and the horizontal push button. The horizontal push button is provided with a locking block that is locked with the body, and the body is provided with a plurality of locking grooves that cooperate with the locking block for adjusting the angle of the handle.

[0004] In the existing handle rotation structure, the handle and the casing are rotationally connected, and there is a certain gap at the connection. The rotation connection has only one locking switch for locking the relative rotation, so that the gap cannot be well solved. The gap will cause the handle and the casing to shake, resulting in a poor user experience and posing certain safety hazards. Summary of the invention

[0005] Based on the above-mentioned power tool with a rotating handle, the handle and the casing are rotationally connected, and there is a certain gap at the connection. The rotating connection has only one locking switch for locking the relative rotation, so that the gap cannot be well solved. The gap will cause shaking between the handle and the casing, resulting in a poor user experience. The present invention provides a handheld power tool with a rotating handle.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a handheld electric tool with a rotating handle, including a housing, a handle, a working head, a power mechanism and a locking mechanism, the housing is provided with a cylindrical connecting part, the circumferential side wall of the connecting part is provided with an annular track groove required for the rotation of the handle, the end of the handle is provided with an opening for the connecting part to be inserted, the inner wall of the handle is provided with an inner ring edge that slides with the annular track groove, the handle is rotatably connected to the housing through the sliding cooperation between the inner ring edge and the annular track groove, the locking mechanism is used to lock the relative rotation of the handle and the housing, the power mechanism is accommodated in the housing, the working head is connected to the power mechanism, and the locking mechanism includes The invention comprises a locking member slidably arranged on the handle and a second elastic member installed between the locking member and the handle. At least two locking grooves are arranged on the end surface of the connecting part. The locking member is inserted into one of the locking grooves to lock the relative rotation of the handle and the casing. The locking member is moved to one side to disengage the locking groove to release the lock between the handle and the casing. At least one set of tensioning mechanism is arranged between the connecting part and the handle. The tensioning mechanism comprises a top support member and a first elastic member acting on the top support member to provide elastic supporting force. The top support member and the first elastic member are supported between the handle and the connecting part so that the rotational connection position of the handle and the connecting part is in a tensioned state to eliminate the shaking gap.

[0007] A further preferred technical solution of the present invention is: a first accommodating portion for accommodating a top support member and a first elastic member is provided on the handle, and the first elastic member is supported between the top support member and the handle, and when the locking member is rotated to be opposite to one of the locking grooves, the top support member is rotated to be opposite to one of the remaining locking grooves, and the top support member is supported against the lock groove.

[0008] A further preferred technical solution of the present invention is: two annular track grooves are provided on the circumferential side wall of the connecting part, and the two annular track grooves are separated by an annular spacing edge; two inner annular edges are provided on the inner wall of the handle, respectively slidingly cooperating with the two annular track grooves; two first limit blocks are provided on the annular spacing edge, and a second limit block is provided on the handle between the two inner annular edges; the second limit block is inserted between the two first limit blocks, and a space is formed between the two first limit blocks for the second limit block to slide relative to each other.

[0009] A further preferred technical solution of the present invention is: a through hole connected to the casing is provided on the end face of the connecting part, and a convex part is convexly provided on the inner wall of the through hole, and the number of the convex parts is the same as the locking groove. The locking groove is arranged on the convex part, and adjacent convex parts are connected by arc-shaped connecting ribs, and each connecting rib is combined to form an annular ring coaxial with the connecting part, and a circular bearing seat coaxial with the connecting part is provided inside the annular ring, and a plurality of circumferentially evenly distributed connecting beams are integrally formed on the periphery of the bearing seat, and any connecting beam extends outward along the radial direction of the bearing seat to the inner wall or the convex part of the connecting rib, and a fan-shaped hole is formed between two adjacent connecting beams, and the outer wall of the connecting rib is provided with a supporting rib extending to the inner wall of the through hole.

[0010] A further preferred technical solution of the present invention is: the supporting member is a sphere or a ball head or a tapered pin, the notch of the locking groove is provided with an expansion opening with a taper or an arc, and the supporting member abuts against the expansion opening.

[0011] A further preferred technical solution of the present invention is: a circular boss is provided on the casing, a first step is formed between the boss and the casing, the connecting portion is arranged on the end face of the boss, the connecting portion and the boss have different diameters and a second step is formed therebetween, and a raised ring is provided on the end face of one open end of the handle, and the ring is sleeved on the outer side of the boss.

[0012] A further preferred technical solution of the present invention is: the locking member includes a main body, the handle is provided with a second accommodating portion for accommodating the main body to slide inside, the main body is provided with a locking pin and a push plate that are plugged into and cooperate with the lock slot, the push plate extends out of the handle for hand pushing and pulling, and the handle is provided with a movable opening for the push plate to extend out.

[0013] A further preferred technical solution of the present invention is: the main body is provided with a front shielding plate located in front of the push plate and a rear shielding plate located behind the push plate, and both sides of the second accommodation portion are provided with a first slide groove that slidably cooperates with the front shielding plate and a second slide groove that slidably cooperates with the rear shielding plate.

[0014] When the push plate is pushed backward, the main body and the lock pin move backward to make the lock pin disengage from the lock slot, and the front shielding plate moves to the movable opening to form a shield;

[0015] When the push plate loses its force, the second elastic member pushes the main body and the lock pin forward so that the lock pin is inserted into the corresponding lock groove, and the rear shielding plate moves to the movable opening to form a shield.

[0016] A further preferred technical solution of the present invention is: there are four lock grooves, and the four lock grooves are arranged in a circular array on the end face of the connecting part with the axis of the connecting part as the center. The tensioning mechanism is provided in one group, and the tensioning mechanism and the locking mechanism are arranged at symmetrical positions on both sides of the rotation axis of the handle. A third step is provided between the lock pin and the main body. When the lock pin is inserted into the lock groove, the third step is against the end face of the connecting part. Two mounting platforms are provided in the handle, and the first accommodating part and the second accommodating part are respectively arranged on the two mounting platforms, and extension openings for extending the locking member and the supporting member are respectively provided on the end faces of the two mounting platforms opposite to the connecting part.

[0017] A further preferred technical solution of the present invention is that the direction of the force of the first elastic member supported between the handle and the supporting member is parallel to the rotation axis of the handle, and the sliding direction of the locking member relative to the handle is parallel to the rotation axis of the handle.

[0018] Compared with the prior art, the advantage of the present invention is that at least one group of tensioning mechanisms is arranged between the connecting part and the handle. The tensioning mechanism includes a top support member and a first elastic member acting on the top support member to provide elastic supporting force. The top support member and the first elastic member are supported between the handle and the connecting part, so that the rotational connection position of the handle and the connecting part is in a tensioned state, so as to eliminate the shaking gap, reduce the shaking of the handle caused by the user during use, improve the safety of the machine and the user experience, and prevent the user from abandoning the machine eventually due to the insecurity caused by the shaking of the handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0020] Figure 1 It is a schematic diagram of the overall structure of the electric tool;

[0021] Figure 2 is a cross-sectional schematic diagram of an electric tool;

[0022] Figure 3 for Figure 2 A local enlarged view of point A;

[0023] Figure 4 for Figure 2 A partial enlarged view of point B;

[0024] Figure 5 It is a transverse cross-sectional schematic diagram of an electric tool;

[0025] Figure 6 It is a schematic diagram of the structure of the front part of the power tool;

[0026] Figure 7 It is a schematic diagram of the structure of the rear part of the power tool;

[0027] Figure 8 This is a disassembled diagram of the handle part of the power tool;

[0028] Fig. 9 The structure of the motor housing is shown in Figure 1. Figure 1 ;

[0029] Fig.10 The structure of the motor housing is shown in Figure 1. Figure 2 ;

[0030] Fig.11 The structure of the locking part is shown in FIG. Figure 1 ;

[0031] Fig.12 The structure of the locking part is shown in FIG. Figure 2 ;

[0032] Fig.13 Schematic diagram of the internal structure of the right half shell;

[0033] Fig.14 Schematic diagram of the internal structure of the left half shell;

[0034] Fig.15 is a cross-sectional schematic diagram of the electric tool when the locking mechanism is in a locked state;

[0035] Fig.16 is a cross-sectional schematic diagram of the electric tool when the locking mechanism is in an unlocked state;

[0036] Fig.17 This is a diagram of the use state when the handle is rotated 90° clockwise relative to the housing;

[0037] Fig.18 It is a transverse cross-sectional schematic diagram of the electric tool with the handle rotated 90° clockwise relative to the housing;

[0038] Fig.19 This is a diagram of the use state when the handle is rotated 90° counterclockwise relative to the housing;

[0039] Fig. 20 This is a schematic transverse cross-sectional view of the power tool with the handle rotated 90° counterclockwise relative to the housing.

[0040] In the figure: 1, housing; 2, motor housing; 3, head housing; 4, working head; 5, handle; 6, housing groove; 7, push plate; 8, arc edge; 9, control switch; 10, rotation axis; 11, driving motor; 12, active bevel gear; 13, output shaft; 14, driven bevel gear; 15, second positioning groove; 16, second housing portion; 17, second elastic member; 18, movable opening; 19, main body; 20, positioning column; 21, mounting groove; 22, locking pin; 23, locking groove; 24, connecting portion; 25, inner ring edge; 26, annular track groove; 27, annular spacing edge; 28, third step; 29, first step; 30, boss; 31, second step; 32, collar; 33. Top support member; 34. Expanding; 35. First accommodating portion; 36. First positioning groove; 37. First elastic member; 38. First limiting block; 39. Second limiting block; 40. Locking member; 41. Opening; 42. Mounting platform; 43. Extension opening; 44. Electric wire; 45. Right half shell; 46. Left half shell; 47. Protrusion; 48. Connecting rib; 49. Through hole; 50. Support rib; 51. Bearing seat; 52. Connecting beam; 53. Fan-shaped hole; 54. Front shielding plate; 55. Rear shielding plate; 56. First mating block; 57. Arc-shaped convex rib; 58. Second mating block; 59. Slot; 60. Insert block; 61. Second slide groove; 62. First slide groove; 63. Holding center line. DETAILED DESCRIPTION

[0041] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It will be appreciated by those skilled in the art that these descriptions are only illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0042] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0043] Figure 1-Figure 20As shown, a handheld electric tool with a rotating handle includes a housing 1, a handle 5, a working head 4, a power mechanism and a locking mechanism. A cylindrical connecting portion 24 is provided on the housing 1, and an annular track groove 26 required for the rotation of the handle 5 is provided on the circumferential side wall of the connecting portion 24. An opening 41 for inserting the connecting portion 24 is provided at the end of the handle 5. An inner ring edge 25 that slides with the annular track groove 26 is provided on the inner wall of the handle 5. The handle 5 is rotatably connected to the housing 1 through the sliding fit between the inner ring edge 25 and the annular track groove 26, so that the handle 5 can be adjusted in angle by rotating relative to the housing 1 to meet the use of different workstations or different angular positions. When the handle 5 is rotated to adjust the angle relative to the housing 1, the inner ring edge 25 slides along the annular track groove 26. The locking mechanism is used to lock the relative rotation of the handle 5 and the housing 1 after the angle is adjusted. The power mechanism is accommodated in the housing 1, and the working head 4 is connected to the power mechanism. The power mechanism drives the working head 4 to move for operation. The handle 5 uses the axis of the connecting portion 24 as a rotation axis 10 , and the handle 5 rotates relative to the housing 1 around the rotation axis 10 .

[0044] Figure 2 , Figure 3 , Figure 8 , Fig.15 , Fig.16 As shown, the locking mechanism includes a locking member 40 slidably arranged on the handle 5, a second elastic member 17 installed between the locking member 40 and the handle 5, and at least two locking grooves 23 are provided on the end surface of the connecting portion 24. The locking member 40 is inserted into one of the locking grooves 23 to lock the relative rotation of the handle 5 and the housing 1. The locking member 40 is moved to one side so that the locking member 40 overcomes the elastic force of the second elastic member 17 and moves out of the locking groove 23, thereby releasing the lock between the handle 5 and the housing 1.

[0045] Figure 6 As shown, preferably, there are four lock slots 23, which are arranged in a circular array on the end face of the connecting portion 24 with the axial line of the connecting portion 24 as the center, so that the handle 5 can be rotated 90° relative to the housing 1 to enable the locking member 40 to rotate from a position opposite to one lock slot 23 to a position opposite to another adjacent lock slot 23.

[0046] Fig.11 , Fig.12 As shown, the locking member 40 includes a main body 19 slidably arranged in the handle 5, the main body 19 is provided with a locking pin 22 plugging into a locking groove 23 and a push plate 7 for the user to control the sliding of the main body 19, the handle 5 is provided with a second accommodating portion 16 for accommodating the main body 19 to slide therein, the push plate 7 extends out of the handle 5 for the user to push and pull with his hand, and the handle 5 is provided with a movable opening 18 for the push plate 7 to extend out.

[0047] Figure 1 , Figure 3As shown, a raised convex edge is provided on the outer wall of the handle 5, and the convex edge surrounds a receiving groove 6 for the extended push plate 7 to move inside. The above-mentioned movable opening 18 is arranged at the bottom of the receiving groove 6, and the top of the push plate 7 is higher than the edge of the groove of the receiving groove 6. The height of the groove of the receiving groove 6 gradually decreases from front to back. The front edge of the receiving groove 6 and the movable opening 18 are connected by an arc edge 8, so as to form a space for a finger to be inserted in the front of the movable opening 18 to push the push plate 7 to move backward. When in the locked state, the second elastic member 17 pushes The main body 19 and the locking pin 22 move forward until the locking pin 22 is inserted into the corresponding locking groove 23. At this time, the push plate 7 is in contact with or close to the front edge of the movable opening 18. When unlocking is required, the user pushes the push plate 7 backward by hand, so that the push plate 7 drives the main body 19 and the locking pin 22 to move backward, and the locking pin 22 disengages from the locking groove 23, thereby releasing the lock on the handle 5 and the connecting portion 24. At this time, the push plate 7 moves backward until it is in contact with or close to the rear edge of the movable opening 18.

[0048] Preferably, the width of the push plate 7 is equal to or substantially equal to the width of the movable opening 18, so that the forward and backward sliding of the main body 19 and the locking pin 22 is more stable.

[0049] Figure 3 , Figure 7 As shown, preferably, the second accommodating portion 16 is a second inner cavity for accommodating the main body 19 and the second elastic member 17, and a protruding opening 43 for the lock pin 22 to protrude is formed on the front side of the second inner cavity. The second elastic member 17 is a second return spring, which is supported between the main body 19 and the rear side of the second inner cavity and is used to push the main body 19 and the lock pin 22 forward. A positioning column 20 protruding backward is provided on the rear side of the main body 19, and a second positioning groove 15 for inserting the rear end of the second return spring is formed on the rear side of the second inner cavity. The rear end of the second return spring is inserted into the second positioning groove 15 and abuts against the inner wall of the rear side of the second positioning groove 15. The front end of the second return spring is sleeved on the outer side of the positioning column 20 and abuts against the rear side of the main body 19. The front inner wall of the second inner cavity can limit the forward movement of the main body 19, or the forward movement of the main body 19 can be limited by the push plate 7 abutting against the front edge of the movable opening 18, so as to limit the main body 19 from being pushed forward by the second return spring and leaving the second inner cavity.

[0050] The second elastic member 17 is not limited to a spring, and other elastic members are suitable for this patent, such as spring sheets.

[0051] Preferably, the lock pin 22 is cylindrical, and the lock groove 23 is a circular groove that matches the lock pin 22. The lock pin 22 can be integrally formed with the main body 19, or the lock pin 22 and the main body 19 can be two independent parts fixedly connected, for example, the front side of the main body 19 is provided with a mounting groove 21, and the lock pin 22 is inserted into the mounting groove 21 and is tightly fixed to the main body 19.

[0052] The main body 19 is provided with a front shielding plate 54 located in front of the push plate 7 and a rear shielding plate 55 located behind the push plate 7, and the two sides of the second accommodating portion 16 are provided with a first sliding groove 62 slidably matched with the front shielding plate 54 and a second sliding groove 61 slidably matched with the rear shielding plate 55.

[0053] Fig.15 , Fig.16 As shown, when the push plate 7 is subjected to a backward thrust, the push plate 7 drives the main body 19 and the locking pin 22 to move backward so that the locking pin 22 disengages from the locking groove 23, and the front shielding plate 54 moves to the movable opening 18 to form a shield; when the push plate 7 loses force, the second elastic member 17 pushes the main body 19 and the pin shaft forward so that the locking pin 22 is inserted into the corresponding locking groove 23, and the rear shielding plate 55 moves to the movable opening 18 to form a shield.

[0054] The front baffle plate 54 and the rear baffle plate 55 block the movable opening 18, which can prevent the internal structure of the handle 5 from being exposed from the movable opening 18 in the unlocked state or the locked state, making the structure more beautiful, and can play a certain role in preventing foreign objects from entering, thereby preventing foreign objects from entering the handle 5 from the movable opening 18 and affecting the movement of the main body 19. In addition, the sliding cooperation between the front baffle plate 54 and the first slide groove 62, and the sliding cooperation between the rear baffle plate 55 and the second slide groove 61 play a certain guiding role in the forward and backward movement of the main body 19 and the locking pin 22, making the forward and backward movement of the main body 19 and the locking pin 22 more stable, and making the locking effect more stable.

[0055] The front shielding plate 54 , the rear shielding plate 55 , the main body 19 , the push plate 7 and the positioning column 20 are integrally formed.

[0056] Figure 2 , Figure 4 As shown, at least one set of tensioning mechanism is provided between the connecting portion 24 and the handle 5, and the tensioning mechanism includes a top support member 33 and a first elastic member 37 acting on the top support member 33 to provide elastic supporting force. The top support member 33 and the first elastic member 37 are supported between the handle 5 and the connecting portion 24 so that the rotational connection position of the handle 5 and the connecting portion 24 is in a tensioned state, so as to eliminate the shaking gap, reduce the shaking of the handle 5 caused by the user during use, improve the safety of the machine and the user experience, and prevent the user from abandoning the machine eventually due to the insecurity caused by the shaking of the handle 5.

[0057] The direction of the force supported by the first elastic member 37 between the handle 5 and the supporting member 33 is parallel to the rotation axis 10 of the handle 5, so that the supporting effect of the supporting member 33 and the first elastic member 37 on the handle 5 and the connecting part 24 is optimal, and the shaking gap is better eliminated.

[0058] The sliding direction of the locking member 40 relative to the handle 5 is parallel to the rotation axis 10 of the handle 5, so that the locking member 40 is not easily stuck when moving to lock or unlock.

[0059] The handle 5 is provided with a first accommodating portion 35 for accommodating the top support member 33 and the first elastic member 37. The first elastic member 37 is supported between the top support member 33 and the handle 5. When the locking member 40 rotates to be opposite to one of the locking grooves 23, the top support member 33 rotates to be opposite to one of the remaining locking grooves 23, and the top support member 33 is supported against the locking groove 23.

[0060] When the handle 5 is rotated relative to the casing 1, the top support member 33 rotates with the handle 5, and the top support member 33 and the locking groove 23 form an extrusion so that the top support member 33 is pressed to move toward the side away from the end face of the connecting portion 24, and the top support member 33 moves out of the locking groove 23 and abuts against the end face of the connecting portion 24, and the top support member 33 continues to rotate with the handle 5 until the top support member 33 rotates to a position opposite to the next level of locking groove 23, and the first elastic member 37 pushes the top support member 33 forward so that the top support member 33 presses on the locking groove 23, so that during the process of the top support member 33 rotating with the handle 5, the top support member 33 jumps step by step between the above-mentioned four locking grooves 23, and when the top support member 33 falls on the locking groove 23, it will provide a stuck feedback to the operating hand, thereby improving the user experience when rotating, and through the cooperation between the top support member 33 and the locking groove 23, it can be ensured that the locking member 40 is facing the locking groove 23 to be inserted, which is convenient for operation.

[0061] Figure 6-Figure 10 As shown, preferably, the top support member 33 is a sphere or a ball head or a tapered pin, and the notch of the lock slot 23 is provided with a flared opening 34 with a taper or curvature, and the top support member 33 abuts against the flared opening 34, and the contact between the flared opening 34 and the top support member 33 increases the contact area, so that the top support member 33 is more stably supported between the connecting portion 24 and the handle 5, so as to achieve a better tensioning effect.

[0062] Figure 4 , Figure 7 As shown, preferably, the first accommodating portion 35 is a first inner cavity for accommodating the top support member 33 and the first elastic member 37, and the front side of the first inner cavity is formed with an extension port 43 for the top support member 33 to extend out, and the first elastic member 37 is a first return spring, which is supported between the top support member 33 and the rear side of the first inner cavity and is used to push the top support member 33 forward so that the top support member 33 can be supported on the end surface of the connecting portion 24, and the rear side of the first inner cavity is formed with a first positioning groove 36 for inserting the rear end of the first return spring, and the rear end of the first return spring is inserted into the first positioning groove 36 and rests on the inner wall of the rear side of the first positioning groove 36.

[0063] The first elastic member 37 is not limited to a spring, and other elastic members are suitable for this patent, such as spring sheets.

[0064] Figure 7 , Figure 8 As shown, preferably, the tensioning mechanism is provided with a group, the tensioning mechanism and the locking mechanism are provided at symmetrical positions on both sides of the rotation axis 10 of the handle 5, and a third step 28 is provided between the lock pin 22 and the main body 19. When the lock pin 22 is inserted into the lock slot 23, the third step 28 presses on the end face of the connecting portion 24. At this time, the main body 19 and the second elastic member 17 are also supported between the handle 5 and the housing 1 to provide tensioning force, and by providing the tensioning mechanism and the locking mechanism at symmetrical positions on both sides of the rotation axis 10, the tensioning force is more symmetrical and balanced, achieving a better tensioning effect. The number of tensioning mechanisms provided in this patent is not limited to one group, one group is only preferred, and two groups and multiple groups are applicable to this patent.

[0065] Two mounting platforms 42 are provided in the handle 5, and the two mounting platforms 42 are located on opposite sides of the handle 5. The first accommodating portion 35 and the second accommodating portion 16 are respectively arranged on the two mounting platforms 42. The end surfaces of the two mounting platforms 42 opposite to the connecting portion 24 are respectively provided with extension openings 43 for the locking member 40 and the supporting member 33 to extend out.

[0066] Figure 3 , Figure 4 As shown, preferably, two annular track grooves 26 are provided on the circumferential side wall of the connecting portion 24, and the two annular track grooves 26 are spaced apart by an annular spacing edge 27, and two inner annular edges 25 are provided on the inner wall of the handle 5, respectively slidingly cooperating with the two annular track grooves 26, and two first limit blocks 38 are provided on the annular spacing edge 27, and a second limit block 39 is provided on the handle 5 between the two inner annular edges 25, and the second limit block 39 is inserted between the two first limit blocks 38, and a space for the second limit block 39 to slide relative to each other is formed between the two first limit blocks 38, and the angle range of relative rotation of the handle 5 and the housing 1 is limited by the cooperation between the two first limit blocks 38 and the second limit block 39.

[0067] Figure 1 , Figure 5 , Figure 17-Figure 20As shown, for example, the locking grooves 23 on the end surface of the connecting portion 24 are respectively located at the upper, lower, left and right positions. When the handle 5 is at the 0° position, the locking pin 22 and the supporting member 33 are respectively stuck in the upper and lower locking grooves 23. The second limit block 39 is located between the two first limit blocks 38. The angle between the left side of the second limit block 39 and the first limit block 38 on the left is 90°, and the angle between the right side of the second limit block 39 and the first limit block 38 on the right is 90°. When the handle 5 is moved from the 0° position to the left, the locking pin 22 and the supporting member 33 are respectively stuck in the upper and lower locking grooves 23. The second limit block 39 is located between the two first limit blocks 38. When the casing 1 rotates 90° clockwise, the handle 5 is at the 90° position, the locking pin 22 and the top support member 33 rotate with the handle 5 to be stuck in the left and right locking grooves 23, and the second limit block 39 is pressed against the upper limit block 38 on the left. When the handle 5 rotates 90° counterclockwise from the 0° position relative to the casing 1, the handle 5 is at the -90° position, the locking pin 22 and the top support member 33 rotate with the handle 5 to be stuck in the left and right locking grooves 23, and the second limit block 39 is pressed against the upper limit block 38 on the right.

[0068] In addition, the two annular track grooves 26 are respectively slidably matched with the two inner ring edges 25, which increases the support area between the handle 5 and the connecting part 24, making the connection between the handle 5 and the connecting part 24 more stable, thereby reducing the shaking effect.

[0069] Fig.13 , Fig.14 As shown, the handle 5 includes a left half shell 46 and a right half shell 45. The left half shell 46 and the right half shell 45 are fixed by screws after being matched. The inner walls of the left half shell 46 and the right half shell 45 are provided with arcuate ribs 57. The left half shell 46 and the right half shell 45 are also provided with first matching blocks 56. When the left half shell 46 and the right half shell 45 are matched and connected, the arcuate ribs 57 on the left half shell 46 and the arcuate ribs 57 on the right half shell 45 are combined to form the above-mentioned inner ring edge 25. The first matching blocks 56 on the left half shell 46 and the first matching blocks 56 on the right half shell 45 are matched to form the above-mentioned two mounting platforms 42. The two groups of first matching blocks 56 are respectively enclosed to form the above-mentioned first accommodating portion 35 and the second accommodating portion 16. The above-mentioned second limit block 39 is also composed of the second matching blocks 58 on both sides when the left half shell 46 and the right half shell 45 are matched. This structure facilitates the processing of the handle 5 and the installation of the locking mechanism and the tensioning mechanism.

[0070] An insert block 60 is provided on one of the joint surfaces of the left half shell 46 and the right half shell 45, and a slot 59 is provided on the other joint surface. When the left half shell 46 and the right half shell 45 are matched, the insert block 60 is inserted into the slot 59 to locate the positions of the left half shell 46 and the right half shell 45, thereby facilitating the installation of the left half shell 46 and the right half shell 45.

[0071] A circular boss 30 is provided on the casing 1, and a first step 29 is formed between the boss 30 and the casing 1. The connecting portion 24 is arranged on the end face of the boss 30. The connecting portion 24 and the boss 30 have different diameters and a second step 31 is formed therebetween. A raised ring 32 is provided on the end face of one end of the handle 5 having an opening 41, and the ring 32 is sleeved on the outer side of the boss 30. The ring 32 cooperates with the boss 30 to increase the length of the sleeve connection between the handle 5 and the casing 1, thereby improving the stability of the connection between the handle 5 and the casing 1 and reducing the shaking between the handle 5 and the casing 1.

[0072] Fig.10 As shown, a through hole 49 communicating with the casing 1 is provided on the end face of the connecting portion 24, and a convex portion 47 is convexly provided on the inner wall of the through hole 49. The number of the convex portions 47 is the same as the locking groove 23, and one convex portion 47 is provided with the above-mentioned locking groove 23. Adjacent convex portions 47 are connected by arc-shaped connecting ribs 48, and each connecting rib 48 is combined to form an annular ring coaxial with the connecting portion 24. A circular bearing seat 51 coaxial with the connecting portion 24 is provided inside the annular ring, and a plurality of circumferentially uniformly distributed connecting beams 52 are integrally formed on the outer periphery of the bearing seat 51, and any connecting beam 52 extends radially outwardly from the bearing seat 51 to the inner wall of the connecting rib 48 or the convex portion 47, and a fan-shaped hole 53 is formed between two adjacent connecting beams 52, and a supporting rib 50 is provided on the outer wall of the connecting rib 48 to extend to the inner wall of the through hole 49.

[0073] Since the connection part 24 is generally made of plastic material, the plastic material is easily compressed and elastically deformed during use. The deformation of the connection part 24 is likely to increase the shaking gap between the casing 1 and the handle 5. The connecting ribs 48, the supporting ribs 50 and the connecting beams 52 cooperate to act as reinforcing ribs to increase the strength of the connection part 24, reduce the deformation of the connection part 24 during use, and thus reduce the shaking between the casing 1 and the handle 5.

[0074] The holes formed by the connecting ribs 48, the supporting ribs 50 and the connecting beams 52 can also be used to connect the wires 44 in the handle 5 to the housing 1, and can also be used for heat dissipation of the power mechanism. The power mechanism includes a drive motor 11 for outputting power, and one end of the drive motor 11 is supported by a bearing mounted on the bearing seat 51.

[0075] The handle 5 is provided with a control switch 9 .

[0076] The gripping centerline 63 of the handle 5 is parallel or substantially parallel to the rotation axis 10 of the handle 5 .

[0077] This structure can be applied to handheld power tools such as angle grinders, hedge trimmers, and slotting machines. For example, in this embodiment, when applied to an angle grinder, the housing 1 includes a motor housing 2 and a head housing 3, the head housing 3 is connected to the front end of the motor housing 2, the handle 5 is rotatably connected to the rear end of the motor housing 2, the rear end of the motor housing 2 has a connecting portion 24 for connecting with the handle 5, the power mechanism includes a driving motor 11 installed in the motor housing 2, an output shaft 13 arranged on the head housing 3, and a connecting portion 24 for connecting with the handle 5. The gear set between the output shaft 13 and the drive motor 11 is accommodated in the head shell 3. The gear set includes a meshing active bevel gear 12 and a driven bevel gear 14. The active bevel gear 12 is connected to the motor shaft of the drive motor 11, and the driven bevel gear 14 is connected to the output shaft 13. The working head 4 is a grinding disc installed on the output shaft 13. When the drive motor 11 is started, the gear set receives the power output by the drive motor 11 and transmits it to the output shaft 13. The output shaft 13 drives the grinding disc to rotate for grinding.

[0078] The handle 5 has three angular positions relative to the motor accommodating shell 2, namely 0°, 90°, and -90°. When in the 0° position, the grinding disc of the handle 5 is facing downward; when the handle 5 is rotated 90° clockwise relative to the motor accommodating shell 2, the handle 5 is in the 90° position, and the grinding disc of the handle 5 is facing to the right; when the handle 5 is rotated 90° counterclockwise relative to the motor accommodating shell 2, the handle 5 is in the -90 degree position, and the grinding disc of the handle 5 is facing to the left. By changing the relative angle of the handle 5 to the casing 1, the angle grinder can be suitable for use in different workstations or at different angular positions.

[0079] The handheld electric tool with a rotating handle provided by the present invention is introduced above. The principle and implementation mode of the present invention are described in this article by using specific examples. The description of the above embodiments is only used to help understand the present invention and its core ideas. It should be pointed out that for ordinary technicians in this technical field, the present invention can also be improved and modified without departing from the principle of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A handheld electric tool with a rotating handle, comprising a housing, a handle, a working head, a power mechanism and a locking mechanism, wherein the housing is provided with a cylindrical connecting portion, the circumferential side wall of the connecting portion is provided with an annular track groove required for the rotation of the handle, the end of the handle is provided with an opening for the connecting portion to be inserted, the inner wall of the handle is provided with an inner ring edge that slides with the annular track groove, the handle is rotatably connected to the housing through the sliding cooperation between the inner ring edge and the annular track groove, the locking mechanism is used to lock the relative rotation of the handle and the housing, the power mechanism is accommodated in the housing, and the working head is connected to the power mechanism, characterized in that: The locking mechanism includes a locking member slidably arranged on the handle, a second elastic member installed between the locking member and the handle, at least two locking grooves are arranged on the end surface of the connecting part, the locking member is inserted into one of the locking grooves to lock the relative rotation of the handle and the casing, and the locking member is moved to one side to disengage the locking groove to release the lock between the handle and the casing. At least one set of tensioning mechanism is provided between the connecting part and the handle, and the tensioning mechanism includes a top support member and a first elastic member acting on the top support member to provide elastic supporting force. The top support member and the first elastic member are supported between the handle and the connecting part so that the rotational connection position of the handle and the connecting part is in a tensioned state to eliminate the shaking gap.

2. The handheld power tool with a rotating handle according to claim 1, characterized in that: The handle is provided with a first accommodating portion for accommodating a top support member and a first elastic member, and the first elastic member is supported between the top support member and the handle. When the locking member rotates to be opposite to one locking groove, the top support member rotates to be opposite to one of the remaining locking grooves, and the top support member is supported against the locking groove.

3. The handheld power tool with a rotating handle according to claim 1, characterized in that: The circumferential side wall of the connecting part is provided with two annular track grooves, and the two annular track grooves are separated by an annular spacer edge. The inner wall of the handle is provided with two inner annular edges that are respectively slidably matched with the two annular track grooves. The annular spacer edge is provided with two first limit blocks set at intervals. The handle is provided with a second limit block between the two inner annular edges. The second limit block is inserted between the two first limit blocks, and a space is formed between the two first limit blocks for the second limit block to slide relative to each other.

4. The handheld power tool with a rotating handle according to claim 1, characterized in that: A through hole communicating with the casing is provided on the end face of the connecting part, and a convex part is convexly provided on the inner wall of the through hole. The number of the convex parts is the same as the locking groove. The locking groove is arranged on the convex part. Adjacent convex parts are connected by arc-shaped connecting ribs. Each connecting rib is combined to form an annular ring coaxial with the connecting part. A circular bearing seat coaxial with the connecting part is provided inside the annular ring. A plurality of circumferentially uniformly distributed connecting beams are integrally formed on the periphery of the bearing seat. Any connecting beam extends outwardly along the radial direction of the bearing seat to the inner wall or the convex part of the connecting rib. A fan-shaped hole is formed between two adjacent connecting beams. The outer wall of the connecting rib is provided with a supporting rib extending to the inner wall of the through hole.

5. The handheld power tool with a rotating handle according to claim 2, characterized in that: The supporting member is a sphere or a ball head or a tapered pin, the notch of the locking groove is provided with an expansion opening with a taper or an arc, and the supporting member abuts against the expansion opening.

6. The handheld power tool with a rotating handle according to claim 1, characterized in that: The casing is provided with a circular boss, a first step is formed between the boss and the casing, the connecting portion is arranged on the end face of the boss, the connecting portion and the boss have different diameters and a second step is formed therebetween, and the handle has an open end face on which a raised ring is provided, the ring being sleeved on the outer side of the boss.

7. The handheld power tool with a rotating handle according to claim 2, characterized in that: The locking member includes a main body, the handle is provided with a second accommodating portion for accommodating the main body to slide therein, the main body is provided with a locking pin and a push plate that are plugged into and cooperate with the lock groove, the push plate extends out of the handle for hand pushing and pulling, and the handle is provided with a movable opening for the push plate to extend out.

8. The handheld power tool with a rotating handle according to claim 7, characterized in that: The main body is provided with a front shielding plate located in front of the push plate and a rear shielding plate located in the rear of the push plate, and both sides of the second accommodation portion are provided with a first slide groove that slidably cooperates with the front shielding plate and a second slide groove that slidably cooperates with the rear shielding plate. When the push plate is pushed backward, the main body and the lock pin move backward to make the lock pin disengage from the lock slot, and the front shielding plate moves to the movable opening to form a shield; When the push plate loses its force, the second elastic member pushes the main body and the lock pin forward so that the lock pin is inserted into the corresponding lock groove, and the rear shielding plate moves to the movable opening to form a shield.

9. The handheld power tool with a rotating handle according to claim 7, characterized in that: There are four lock grooves, which are arranged in a circular array on the end surface of the connecting part with the axis of the connecting part as the center. There is one group of tensioning mechanisms, and the tensioning mechanism and the locking mechanism are arranged at symmetrical positions on both sides of the rotation axis of the handle. A third step is provided between the lock pin and the main body. When the lock pin is inserted into the lock groove, the third step is against the end surface of the connecting part. Two mounting platforms are provided in the handle, and the first accommodating part and the second accommodating part are respectively arranged on the two mounting platforms. Extension openings for extending the locking member and the supporting member are respectively provided on the end surfaces of the two mounting platforms opposite to the connecting part.

10. The handheld electric tool with a rotating handle according to claim 1, 2 or 9, characterized in that: The acting direction of the force supported by the first elastic member between the handle and the supporting member is parallel to the rotation axis of the handle, and the sliding direction of the locking member relative to the handle is parallel to the rotation axis of the handle.

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