Anti-shaking rotary handle structure of handheld electric tool

Abstract

The utility model discloses an anti-shake rotary handle structure of a handheld electric tool, which comprises a casing, a handle and a locking mechanism, the handle is rotatably connected onto the casing, the locking mechanism is used for locking relative rotation of the handle and the casing, at least one group of tensioning mechanism is arranged between the handle and the casing, and the tensioning mechanism is used for tensioning the handle and the casing. The tensioning mechanism comprises a jacking piece and a first elastic piece acting on the jacking piece and providing elastic supporting force, and the jacking piece and the first elastic piece are supported between the handle and the machine shell so that the rotating connecting position of the handle and the machine shell can be in a tensioned state, so that a shaking gap is eliminated, shaking caused by the handle in the using process of a user is relieved, and the user experience is improved. The use safety and the user experience of the machine are improved, and the situation that a user abandons the machine due to insecurity caused by shaking of the handle is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a handheld electric tool, especially a handheld electric tool's anti-shaking rotary handle structure. BACKGROUND

[0002] At present, many electric tools, especially handheld electric tools, such as angle grinders, hedge trimmers, slotting machines, etc., are usually provided with rotary handles, so that in different use occasions, the operator can adjust the orientation of the handle as needed to facilitate holding and force.

[0003] For example, the rotatable angle grinder disclosed in patent CN213164703U includes a shell, a handle, a drive assembly, a gear box and an abrasive wheel. The end of the shell and the handle are circular. The outer end face of the shell is provided with a track groove required for the rotation of the handle. The inner end face of the handle is provided with a catch matched with the track groove. When the handle is rotated, the catch slides along the track groove. The handle is integrally formed with a grooved support. The groove body of the support is assembled with a resilient element. The top of the resilient element is connected with a locking button. Under normal circumstances, the locking button leaves a movable gap with the support in the height direction. The inner end face of the shell is circumferentially distributed with at least two clamping grooves. The locking button is provided with a locking tongue with a free end that can be embedded in the clamping groove. Pressing the locking button can make the locking tongue disengage from the clamping groove to release the locking connection between the handle and the shell.

[0004] In the existing handle rotation structure, the handle and the shell are rotationally connected, and the connection has a certain gap. Only one locking switch is used to lock the relative rotation at the rotation connection, so the gap cannot be well solved. The gap can cause the handle and the shell to shake, resulting in poor user experience and certain safety hazards. INVENTION CONTENTS

[0005] Based on the above-mentioned electric tool with a rotary handle, the handle and the shell are rotationally connected, and the connection has a certain gap. Only one locking switch is used to lock the relative rotation at the rotation connection, so the gap cannot be well solved. The gap can cause the handle and the shell to shake, resulting in poor user experience and certain safety hazards. The utility model provides a handheld electric tool's anti-shaking rotary handle structure.

[0006] The utility model adopts the technical scheme that the handheld electric tool's anti-shaking rotary handle structure includes a shell, a handle and a locking mechanism. The handle is rotationally connected to the shell. The locking mechanism is used to lock the relative rotation of the handle and the shell. At least one set of tensioning mechanism is arranged between the handle and the shell. The tensioning mechanism includes a jacking piece and a first elastic piece that provides elastic support force on the jacking piece. The jacking piece and the first elastic piece are supported between the handle and the shell, so that the rotation connection position of the handle and the shell is in a tensioned state, thereby eliminating the shaking gap.

[0007] The further preferred technical scheme of the utility model is that the locking mechanism comprises a locking piece arranged on the handle and capable of sliding, and a second elastic piece arranged between the locking piece and the handle, at least two locking grooves are arranged on the casing, the locking piece is inserted into one of the locking grooves to lock the relative rotation between the handle and the casing, and the locking piece is moved to one side to make the locking piece disengage from the locking groove, so that the locking between the handle and the casing is released.

[0008] The further preferred technical scheme of the utility model is that a first accommodating part for accommodating the supporting piece and the first elastic piece is arranged on the handle, the first elastic piece is supported between the supporting piece and the handle, when the locking piece rotates to be opposite to one of the locking grooves, the supporting piece rotates to be opposite to one of the remaining locking grooves, and the supporting piece is supported on the locking groove.

[0009] The further preferred technical scheme of the utility model is that the supporting piece is a spherical body or a ball head or a tapered pin, the groove of the locking groove is provided with a flared portion with a taper or an arc, and the supporting piece is abutted on the flared portion.

[0010] The further preferred technical scheme of the utility model is that a cylindrical connecting part is arranged on the casing, an annular track groove required for the rotation of the handle is arranged on the circumferential side wall of the connecting part, an opening into which the connecting part is inserted is arranged on the end portion of the handle, and an inner ring edge in sliding cooperation with the annular track groove is arranged on the inner wall of the handle.

[0011] The further preferred technical scheme of the utility model is that a first limiting block is arranged on the outer periphery of the connecting part, a second limiting block is arranged on the inner wall of the handle, and the first limiting block and the second limiting block cooperate to limit the rotation range of the handle relative to the casing.

[0012] The further preferred technical scheme of the utility model is that the locking piece comprises a main body portion, a locking pin in plug-in cooperation with the locking groove and a push plate are arranged on the main body portion, the push plate is extended outside the handle for being pushed and pulled by the hand, an opening through which the push plate is extended is arranged on the handle, and a first step is arranged between the locking pin and the main body portion, and the first step is abutted on the casing when the locking pin is inserted into the locking groove.

[0013] The further preferred technical scheme of the utility model is that a front shielding plate located at the front portion of the push plate and a rear shielding plate located at the rear portion of the push plate are arranged on the main body portion,

[0014] When the push plate is subjected to a backward pushing force, the main body portion and the locking pin move backward to make the locking pin disengage from the locking groove, and the front shielding plate moves to the opening to form shielding;

[0015] When the push plate is subjected to a backward pushing force, the main body portion and the locking pin move backward to make the locking pin disengage from the locking groove, and the front shielding plate moves to the opening to form shielding;

[0016] The further preferred technical scheme of the utility model is: the direction of the locking piece relative to the handle moving is parallel with the rotation axis of the handle.

[0017] The further preferred technical scheme of the utility model is: the handle comprises left half shell and right half shell, the inner wall of left half shell and right half shell is equipped with arc convex rib, when left half shell and right half shell are closed and connected, the arc convex rib on left half shell and the arc convex rib on right half shell combine to form the inner ring edge.

[0018] Compared with the prior art, the utility model has the advantages that at least one set of tensioning mechanism is arranged between the handle and the casing, the tensioning mechanism comprises a supporting piece and a first elastic piece providing elastic supporting force on the supporting piece, the supporting piece and the first elastic piece are supported between the handle and the casing, the rotating connection position of the handle and the casing is in a tensioning state, the shaking gap is eliminated, the shaking of the handle during use is reduced, the use safety of the machine and the user experience are improved, and the insecurity caused by the shaking of the handle is prevented, so that the user finally gives up the machine. BRIEF DESCRIPTION OF DRAWINGS

[0019] The utility model will be further described in detail below in combination with the drawings and preferred embodiments, but the person skilled in the art will appreciate that these drawings are only drawn for the purpose of explaining the preferred embodiments, and therefore should not be regarded as limiting the scope of the utility model. In addition, unless specifically indicated, the drawings only schematically show the composition or structure of the described object conceptually and can contain exaggerated display, and the drawings are not necessarily drawn to scale.

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

[0021] Figure 2 It is the connection schematic diagram of casing and handle;

[0022] Figure 3 It is the cutaway schematic diagram of casing and handle connection;

[0023] Figure 4 It is Figure 3 It is the partial enlarged view of A of

[0024] Figure 5 It is the partial enlarged view of B of Figure 3

[0025] Figure 6 It is the transverse cutaway schematic diagram of electric tool;

[0026] Figure 7 It is the schematic diagram of left half shell separating from right half shell;

[0027] ​Figure 8 is an exploded view of the components;

[0028] Figure 9 is a structural diagram of the casing Figure 1 ;

[0029] Figure 10 is a structural diagram of the casing Figure 2 ;

[0030] Figure 11 is a structural diagram of the locking mechanism and the tensioning mechanism on the handle;

[0031] Figure 12 is a structural diagram of the right half shell;

[0032] Figure 13 is a structural diagram of the left half shell;

[0033] Figure 14 is a structural diagram of the locking member Figure 1 ;

[0034] Figure 15 is a structural diagram of the locking member Figure 2 ;

[0035] Figure 16 is a sectional view of the utility model in the locked state;

[0036] Figure 17 is a sectional view of the utility model in the unlocked state;

[0037] Figure 18 is a use state diagram of the handle rotating 90° clockwise relative to the casing of the electric tool;

[0038] Figure 19 is a transverse sectional view of the electric tool in the use state of the handle rotating 90° clockwise relative to the casing;

[0039] Figure 20 is a use state diagram of the handle rotating 90° counterclockwise relative to the casing of the electric tool;

[0040] Figure 21 is a transverse sectional view of the electric tool in the use state of the handle rotating 90° counterclockwise relative to the casing.

[0041] In the figure: 1, handle; 2, control switch; 3, push plate; 4, accommodating groove; 5, arc-shaped edge; 6, machine shell; 7, head shell; 8, polishing disc; 9, rotation axis; 10, holding center line; 11, second elastic member; 12, second positioning groove; 13, second accommodating portion; 14, positioning column; 15, main body portion; 16, mounting groove; 17, lock pin; 18, lock groove; 19, connecting portion; 20, first step; 21, annular track groove; 22, inner ring edge; 23, annular interval edge; 24, movable opening; 25, first positioning groove; 26, first elastic member; 27, first accommodating portion; 28, supporting member; 29, flared portion; 30, second step; 31, collar; 32, protruding column; 33, third step; 34, first limiting block; 35, locking member; 36, second limiting block; 37, left half shell; 38, right half shell; 39, bearing seat; 40, protruding portion; 41, connecting rib; 42, supporting rib; 43, connecting beam; 44, through hole; 45, opening; 46, mounting table; 47, extension opening; 48, first clamping block; 49, arc-shaped protruding rib; 50, second clamping block; 51, insertion slot; 52, insertion block; 53, front shielding plate; 54, rear shielding plate; 55, second sliding groove; 56, first sliding groove; 57, fan-shaped hole. DETAILED DESCRIPTION

[0042] Preferred embodiments of the present application will be described in detail below with reference to the attached drawings. Those skilled in the art will appreciate that the description herein is by way of example only and is not to be construed in any way to limit the scope of the present application.

[0043] It should be noted that like reference numerals in the various figures indicate like elements, and that, where possible, the same reference numbers are used in the various figures to indicate the same or similar elements. Only the essential elements of the application are shown and described, i.e., those elements necessary or desirable for an understanding of the application.

[0044] Figures 1-21 As shown, the anti-shaking rotating handle structure of the handheld electric tool comprises a machine shell 6, a handle 1 and a locking mechanism, the handle 1 is rotatably connected to the machine shell 6, the angle is adjusted by rotating the handle 1 relative to the machine shell 6 to meet the use of different workstations or different angle positions, and the locking mechanism is used to lock the relative rotation of the handle 1 and the machine shell 6 after the angle adjustment.

[0045] Figure 3 、 Figure 4 、 Figure 5 、 Figure 9 、 Figure 10 、 Figure 11As shown, the casing 6 is provided with a cylindrical connecting portion 19, and the circumferential side wall of the connecting portion 19 is provided with an annular track groove 21 required for the rotation of the handle 1. The end portion of the handle 1 is provided with an opening 45 for the insertion of the connecting portion 19. The inner wall of the handle 1 is provided with an inner annular edge 22 which is in sliding fit with the annular track groove 21. The handle 1 is rotatably connected to the casing 6 through the sliding fit of the inner annular edge 22 and the annular track groove 21. When the handle 1 is rotated relative to the casing 6 to adjust the angle, the inner annular edge 22 slides along the annular track groove 21. The handle 1 rotates about the axis of the connecting portion 19 as the rotation axis 9.

[0046] Figure 5 As shown, the locking mechanism includes a lock member 35 which is slidably arranged on the handle 1, and a second elastic member 11 which is arranged between the lock member 35 and the handle 1. The casing 6 is provided with at least two lock grooves 18 which are arranged on the end face of the connecting portion 19. The lock member 35 is inserted into one of the lock grooves 18 to lock the relative rotation between the handle 1 and the casing 6. The lock member 35 is moved to one side to disengage the lock member 35 from the lock groove 18 to release the locking between the handle 1 and the casing 6.

[0047] Figure 10 As shown, preferably, the number of the lock grooves 18 is four, and the four lock grooves 18 are arranged in a circular array about the axis of the connecting portion 19 on the end face of the connecting portion 19. The rotation of the handle 1 relative to the casing 6 by 90° can make the lock member 35 rotate from the position opposite to one of the lock grooves 18 to the position opposite to the adjacent one of the lock grooves 18.

[0048] Figure 14 、 Figure 15 As shown, the lock member 35 includes a main body portion 15 which is slidably arranged in the handle 1. The main body portion 15 is provided with a lock pin 17 which is in plug fit with the lock groove 18, and a push plate 3 which is used by the user to control the sliding of the main body portion 15. The handle 1 is provided with a second accommodating portion 13 for accommodating the sliding of the main body portion 15 in the handle 1. The push plate 3 extends out of the handle 1 for the user to push and pull. The handle 1 is provided with a movable opening 24 through which the push plate 3 extends.

[0049] Figures 1-4As shown, the outer wall of the handle 1 is provided with a raised edge, which forms a containing groove 4 for the extended push plate 3 to move in. The movable opening 24 is arranged at the bottom of the containing groove 4, the top of the push plate 3 is higher than the edge of the containing groove 4, the height of the containing groove 4 gradually decreases from front to back, the front side edge of the containing groove 4 is connected with the movable opening 24 through an arc-shaped edge 5 to form a space in front of the movable opening 24 for the fingers to extend in to push the push plate 3 to move backward. In the locked state, the second elastic member 11 pushes the main body 15 and the lock pin 17 to move forward to the state that the lock pin 17 is inserted into the opposite lock slot 18. At this time, the push plate 3 is attached to or close to the front side edge of the movable opening 24. When it is needed to unlock, the user pushes the push plate 3 backward by hand, so that the push plate 3 drives the main body 15 and the lock pin 17 to move backward, the lock pin 17 is separated from the lock slot 18, and the locking of the handle 1 and the connecting part 19 is released. At this time, the push plate 3 moves backward to be attached to or close to the rear side edge of the movable opening 24.

[0050] Preferably, the width of the push plate 3 is equal to or substantially equal to the width of the movable opening 24, so that the forward and backward sliding of the main body 15 and the lock pin 17 is more stable.

[0051] Preferably, the second containing part 13 is a second inner cavity for containing the main body 15 and the second elastic member 11, the front side of the second inner cavity is formed with an outlet 47 for the lock pin 17 to extend out, the second elastic member 11 is a second return spring, which is supported between the main body 15 and the rear side of the second inner cavity to push the main body 15 and the lock pin 17 to move forward. The rear side of the main body 15 is provided with a rearwardly protruding positioning column 14, the rear side of the second inner cavity is formed with a second positioning slot 12 for the rear end of the second return spring to be inserted into, the rear end of the second return spring is inserted into the second positioning slot 12 and abuts against the inner wall of the rear side of the second positioning slot 12, and the front end of the second return spring is sleeved on the outer side of the positioning column 14 and abuts against the rear side of the main body 15. The front side inner wall of the second inner cavity can limit the forward movement of the main body 15, or the forward movement of the main body 15 can also be limited by the abutment of the push plate 3 and the front side edge of the movable opening 24, so as to limit the main body 15 from being pushed forward by the second return spring to move out of the second inner cavity.

[0052] The second elastic member 11 is not limited to a spring, and other elastic members such as elastic sheets are also applicable to the present patent.

[0053] Preferably, the lock pin 17 is cylindrical, and the lock slot 18 is a circular slot matched with the lock pin 17. The lock pin 17 can be integrally formed with the main body 15, or the lock pin 17 and the main body 15 can be fixedly connected to form two separate parts, for example, the front side of the main body 15 is provided with a mounting slot 16, and the lock pin 17 is inserted into the mounting slot 16 to be fixedly connected with the main body 15.

[0054] Figure 16 ,Figure 17 As shown, the main body 15 is provided with a front shielding plate 53 located at the front of the push plate 3 and a rear shielding plate 54 located at the rear of the push plate 3, and the two sides of the second accommodating portion 13 are provided with a first sliding groove 56 slidingly matched with the front shielding plate 53 and a second sliding groove 55 slidingly matched with the rear shielding plate 54.

[0055] When the push plate 3 is subjected to a rearward pushing force, the push plate 3 drives the main body 15 and the locking pin 17 to move rearward so that the locking pin 17 is disengaged from the locking groove 18, and the front shielding plate 53 is moved to the active opening 24 to form a shielding; when the push plate 3 loses the force, the second elastic member 11 pushes the main body 15 and the pin shaft to move forward so that the locking pin 17 is inserted into the opposite locking groove 18, and the rear shielding plate 54 is moved to the active opening 24 to form a shielding.

[0056] The front shielding plate 53 and the rear shielding plate 54 shield the active opening 24, which can prevent the internal structure of the handle 1 from being exposed from the active opening 24 in the unlocked state or the locked state, make the structure more beautiful, and play a certain role in preventing foreign matters from entering, avoiding the influence of foreign matters entering the handle 1 from the active opening 24 on the movement of the main body 15, in addition, the sliding cooperation of the front shielding plate 53 and the first sliding groove 56 and the sliding cooperation of the rear shielding plate 54 and the second sliding groove 55 play a certain guiding role in the forward and rearward movement of the main body 15 and the locking pin 17, so that the forward and rearward movement of the main body 15 and the locking pin 17 is more stable, and the locking effect is more stable.

[0057] The front shielding plate 53, the rear shielding plate 54, the main body 15, the push plate 3 and the positioning column 14 are integrally formed.

[0058] Figure 5 , Figure 8 As shown, at least one set of tensioning mechanism is arranged between the handle 1 and the casing 6, the tensioning mechanism is supported between the connecting portion 19 and the handle 1, the tensioning mechanism includes a supporting member 28 and a first elastic member 26 acting on the supporting member 28 to provide an elastic supporting force, and the supporting member 28 and the first elastic member 26 are supported between the handle 1 and the connecting portion 19 so that the rotary connection position of the handle 1 and the connecting portion 19 is in a tensioning state, thereby eliminating the wobble gap, reducing the wobble of the handle 1 during use, improving the use safety and user experience of the machine, and preventing the insecurity caused by the wobble of the handle 1 from ultimately leading to the abandonment of the machine by the user.

[0059] The force acting direction of the first elastic member 26 supported between the handle 1 and the supporting member 28 is parallel to the rotation axis 9 of the handle 1, so that the supporting effect of the supporting member 28 and the first elastic member 26 acting on the handle 1 and the connecting portion 19 is optimal, and the wobble gap is better eliminated.

[0060] The sliding direction of the locking member 35 relative to the handle 1 is parallel to the rotation axis 9 of the handle 1, so that the locking member 35 is not easily stuck when moving to the locking or unlocking position.

[0061] The handle 1 is provided with a first accommodating portion 27 for accommodating the supporting member 28 and the first elastic member 26, and the first elastic member 26 is supported between the supporting member 28 and the handle 1. When the locking member 35 is rotated to be opposite to one of the locking grooves 18, the supporting member 28 is rotated to be opposite to one of the remaining locking grooves 18, and the supporting member 28 is supported on the locking groove 18.

[0062] When the handle 1 is rotated relative to the casing 6, the supporting member 28 rotates with the handle 1, and the supporting member 28 is pressed away from the end surface of the connecting portion 19 by being pressed by the locking groove 18. The supporting member 28 is moved out of the locking groove 18 and is supported on the end surface of the connecting portion 19. The supporting member 28 continues to rotate with the handle 1 until the supporting member 28 is rotated to be opposite to the next locking groove 18. The first elastic member 26 pushes the supporting member 28 to move forward so that the supporting member 28 is supported on the locking groove 18. Therefore, during the rotation of the supporting member 28 with the handle 1, the supporting member 28 is sequentially jumped between the four locking grooves 18. When the supporting member 28 falls on the locking groove 18, a user operating the handle 1 can feel a carding feedback, which improves the user experience during the rotation. In addition, the cooperation between the supporting member 28 and the locking groove 18 can ensure that the locking member 35 is opposite to the locking groove 18 to be inserted, which is convenient for operation.

[0063] Preferably, the supporting member 28 is a ball, a ball head or a tapered pin, and the locking groove 18 is provided with a flared portion 29 having a taper or an arc. The supporting member 28 is abutted on the flared portion 29. The flared portion 29 increases the contact area with the supporting member 28, so that the supporting member 28 is more stably supported between the connecting portion 19 and the handle 1, thereby improving the tensioning effect.

[0064] Preferably, the first accommodating portion 27 is a first inner cavity for accommodating the supporting member 28 and the first elastic member 26. The front side of the first inner cavity is formed with an extension opening 47 for the supporting member 28 to extend out of the first inner cavity. The first elastic member 26 is a first return spring supported between the supporting member 28 and the rear side of the first inner cavity for pushing the supporting member 28 to move forward, so that the supporting member 28 can be supported on the end surface of the connecting portion 19. The rear side of the first inner cavity is formed with a first positioning groove 25 for the rear end of the first return spring to be inserted into. The rear end of the first return spring is inserted into the first positioning groove 25 and is abutted on the inner wall of the rear side of the first positioning groove 25.

[0065] The first elastic member 26 is not limited to a spring, and other elastic members such as elastic sheets are also applicable to the present patent.

[0066] Figure 3 、 Figure 7As shown, preferably, the tensioning mechanism is provided with a set of tensioning mechanisms and locking mechanisms are symmetrically arranged on both sides of the rotation axis 9 of the handle 1, and the first step 20 is arranged between the locking pin 17 and the main body 15. When the locking pin 17 is inserted into the locking groove 18, the first step 20 is in contact with the end face of the connecting portion 19. At this time, the main body 15 and the second elastic member 11 also support the tensioning force between the handle 1 and the casing 6. By arranging the tensioning mechanism and the locking mechanism symmetrically on both sides of the rotation axis 9, the tensioning force is more symmetrical and balanced, and better tensioning effect is achieved. The number of tensioning mechanisms provided in the patent is not limited to one set. One set is preferred, and two or more sets are also applicable to the patent.

[0067] Figure 11 As shown, the handle 1 is provided with two installation tables 46, which are located on the opposite sides inside the handle 1. The first accommodating portion 27 and the second accommodating portion 13 are arranged on the two installation tables 46, respectively. The two installation tables 46 are respectively provided with an extension outlet 47 on the end face opposite to the connecting portion 19, for the extension of the locking member 35 and the supporting member 28.

[0068] The outer periphery of the connecting portion 19 is provided with a first limiting block 34, and the inner wall of the handle 1 is provided with a second limiting block 36. The first limiting block 34 and the second limiting block 36 limit the rotation range of the handle 1 relative to the casing 6.

[0069] Preferably, the circumferential side wall of the connecting portion 19 is provided with two annular track grooves 21, which are separated by an annular spacing edge 23. The inner wall of the handle 1 is provided with two inner ring edges 22 which are respectively in sliding cooperation with the two annular track grooves 21. The annular spacing edge 23 is provided with two first limiting blocks 34 which are spaced apart. The second limiting block 36 is arranged between the two inner ring edges 22 on the handle 1, and is inserted between the two first limiting blocks 34. The space for the relative sliding of the second limiting block 36 is formed between the two first limiting blocks 34. The cooperation between the two first limiting blocks 34 and the second limiting block 36 limits the relative rotation angle range of the handle 1 and the casing 6.

[0070] Figure 1 、 Figure 6 、 Figure 18 、 Figure 19 、 Figure 20 、 Figure 21As shown, for example, the lock slots 18 on the end face of the connecting part 19 are respectively located in the upper, lower, left and right four directions, when the handle 1 is at the 0° position, the lock pin 17 and the top support 28 are respectively clamped in the upper and lower two lock slots 18, the second limiting block 36 is located at the middle position between the two first limiting blocks 34, the angle between the left side of the second limiting block 36 and the left side of the first limiting block 34 is 90°, the angle between the right side of the second limiting block 36 and the right side of the first limiting block 34 is 90°, when the handle 1 is rotated 90° clockwise relative to the shell 6 from the 0° position, the handle 1 is at the 90° position, the lock pin 17 and the top support 28 are rotated with the handle 1 to be clamped in the left and right two lock slots 18, and the second limiting block 36 is limited by abutting against the left side of the first limiting block 34, when the handle 1 is rotated 90° counterclockwise relative to the shell 6 from the 0° position, the handle 1 is at the -90° position, the lock pin 17 and the top support 28 are rotated with the handle 1 to be clamped in the left and right two lock slots 18, and the second limiting block 36 is limited by abutting against the right side of the first limiting block 34.

[0071] In addition, the two annular track grooves 21 are respectively in sliding fit with the two inner ring edges 22, which increases the supporting position between the handle 1 and the connecting part 19, and makes the connection between the handle 1 and the connecting part 19 more stable, thereby reducing the shaking effect.

[0072] Figure 7 As shown, the handle 1 includes a left half shell 37 and a right half shell 38, which are fixed by screw connection after being closed, and the inner walls of the left half shell 37 and the right half shell 38 are respectively provided with arc-shaped ribs 49, and the left half shell 37 and the right half shell 38 are further provided with first closing blocks 48, when the left half shell 37 and the right half shell 38 are closed and connected, the arc-shaped ribs 49 on the left half shell 37 and the arc-shaped ribs 49 on the right half shell 38 are combined to form the above-mentioned inner ring edge 22, and the first closing blocks 48 on the left half shell 37 and the first closing blocks 48 on the right half shell 38 are closed to form the above-mentioned two installation tables 46, and the two groups of first closing blocks 48 respectively enclose the above-mentioned first accommodating part 27 and the second accommodating part 13, and the above-mentioned second limiting block 36 is also combined by two side second closing blocks 50 when the left half shell 37 and the right half shell 38 are closed, which facilitates the processing of the handle 1 and the installation of the locking mechanism and the tensioning mechanism.

[0073] Figure 12 、 Figure 13 As shown, one of the joint surfaces of the left half shell 37 and the right half shell 38 is provided with an insertion block 52, and the other joint surface is provided with an insertion slot 51, when the left half shell 37 and the right half shell 38 are closed, the insertion block 52 is inserted into the insertion slot 51 to position the left half shell 37 and the right half shell 38, which facilitates the installation of the left half shell 37 and the right half shell 38.

[0074] The connecting portion 19 is provided on the end face of the convex column 32, the connecting portion 19 and the convex column 32 have different diameters and a third step 33 is formed between the connecting portion 19 and the convex column 32, the handle 1 is provided with a protruding collar 31 on the end face of the opening 45, the collar 31 is sleeved on the outside of the convex column 32, the collar 31 and the convex column 32 cooperate to increase the length of the sleeve connection between the handle 1 and the casing 6, improve the stability of the connection between the handle 1 and the casing 6, and reduce the shaking between the handle 1 and the casing 6.

[0075] Figure 10 As shown, the end face of the connecting portion 19 is provided with a through hole 44 in communication with the casing 6, the inner wall of the through hole 44 is provided with a protruding portion 40, the number of the protruding portions 40 is the same as that of the locking grooves 18, one of the protruding portions 40 is provided with one of the locking grooves 18, the adjacent protruding portions 40 are connected by arc-shaped connecting ribs 41, the connecting ribs 41 are combined to form an annular ring coaxial with the connecting portion 19, a bearing seat 39 in the form of a circular ring coaxial with the connecting portion 19 is arranged inside the annular ring, a plurality of connecting beams 43 distributed in the circumferential direction are integrally formed on the outer periphery of the bearing seat 39, any one of the connecting beams 43 extends outwardly along the radial direction of the bearing seat 39 to the inner wall of the connecting rib 41 or the protruding portion 40, a sector-shaped hole 57 is formed between any two adjacent connecting beams 43, and the outer wall of the connecting rib 41 is provided with a supporting rib 42 extending to the inner wall of the through hole 44.

[0076] Since the connecting portion 19 is generally made of plastic material, the plastic material is easy to elastically deform under pressure during use, and the deformation of the connecting portion 19 is easy to increase the shaking gap between the casing 6 and the handle 1, the connecting rib 41, the supporting rib 42 and the connecting beam 43 cooperate to play the role of a reinforcing rib to improve the strength of the connecting portion 19, reduce the deformation of the connecting portion 19 during use, and thus reduce the shaking between the casing 6 and the handle 1.

[0077] Moreover, the holes formed by the interweaving of the connecting rib 41, the supporting rib 42 and the connecting beam 43 can also be used for the wires in the handle 1 to access the casing 6, and can also be used for heat dissipation of the structure in the casing 6. A driving motor for outputting power can be installed in the casing 6, and one end of the driving motor is supported by a bearing installed on the bearing seat 39.

[0078] The handle 1 is provided with a control switch 2.

[0079] The holding center line 10 of the handle 1 is parallel or substantially parallel to the rotation axis 9 of the handle 1.

[0080] The structure can be applied to a hand-held electric power tool such as an angle grinder, a hedge trimmer, a slotter, etc. For example, in the embodiment, when applied to an angle grinder, the front side of the casing 6 is connected to the head casing 7, the connecting part 19 is arranged at the rear end of the casing 6, the handle 1 is rotatably connected to the rear end of the casing 6, the driving motor is arranged in the casing 6, the head casing 7 is provided with an output shaft, the head casing 7 is provided with a gear set connecting the driving motor and the output shaft, the output shaft is connected to the polishing disc 8, and when the driving motor is started, the gear set receives the power output by the driving motor and transmits the power to the output shaft, the output shaft drives the polishing disc 8 to rotate for polishing.

[0081] The handle 1 has three angular positions of 0°, 90° and -90° relative to the motor accommodating casing. When in the 0° position, the disc surface of the polishing disc 8 faces downward when the handle 1 is held in a normal manner. When the handle 1 is rotated clockwise by 90° relative to the motor accommodating casing, the handle 1 is in the 90° position, and the disc surface of the polishing disc 8 faces rightward when the handle 1 is held in the normal manner. When the handle 1 is rotated counterclockwise by 90° relative to the motor accommodating casing, the handle 1 is in the -90° position, and the disc surface of the polishing disc 8 faces leftward when the handle 1 is held in the normal manner. By changing the relative angle between the handle 1 and the casing 6, the angle grinder can be applied to different workstations or used in different angular positions.

[0082] The anti-shaking rotating handle structure of the hand-held electric power tool is introduced above, and the principle and implementation mode of the utility model are described by applying specific examples. The above description of the embodiments is only used to help understand the utility model and the core idea. It should be pointed out that the utility model can be improved and modified in many ways without departing from the principle of the utility model, and these improvements and modifications also fall within the protection scope of the utility model claim.

Claims

1. A wobbling-resistant rotating handle structure for a handheld power tool, comprising a housing, a handle, and a locking mechanism, wherein the handle is rotatably connected to the housing, and the locking mechanism is used to lock the relative rotation of the handle and the housing, characterized in that, At least one tensioning mechanism is provided between the handle and the housing. The tensioning mechanism includes a top support member and a first elastic member that acts on the top support member to provide elastic support force. The top support member and the first elastic member support the handle and the housing so that the rotational connection position of the handle and the housing is in a tensioned state to eliminate wobbling gaps.

2. The anti-shake rotating handle structure of the handheld power tool according to claim 1, characterized in that, The locking mechanism includes a slidable locking member mounted on the handle and a second elastic member mounted between the locking member and the handle. The housing has at least two locking slots. The locking member is inserted into one of the locking slots to lock the relative rotation of the handle and the housing. Moving the locking member to one side causes it to disengage from the locking slot, thereby releasing the lock between the handle and the housing.

3. The anti-shake rotating handle structure of the handheld power tool according to claim 2, characterized in that, The handle is provided with a first receiving portion for accommodating the top support member and the first elastic member. The first elastic member is supported between the top support member and the handle. When the locking member rotates to be opposite to one of the locking slots, the top support member rotates to be opposite to one of the remaining locking slots, and the top support member abuts against the locking slot for support.

4. The anti-shake rotating handle structure of the handheld power tool according to claim 3, characterized in that, The top support is a sphere, a ball head, or a tapered pin, and the groove of the locking slot is provided with a flared opening with a taper or arc, and the top support abuts against the flared opening.

5. The anti-shake rotating handle structure of the handheld power tool according to claim 1, characterized in that, The housing is provided with a cylindrical connecting part, and the circumferential side wall of the connecting part is provided with an annular track groove for the handle to rotate. The end of the handle is provided with an opening for the connecting part to be inserted, and the inner wall of the handle is provided with an inner ring edge that slides with the annular track groove.

6. The anti-shake rotating handle structure of the handheld power tool according to claim 5, characterized in that, A first limiting block is provided on the outer periphery of the connecting part, and a second limiting block is provided on the inner wall of the handle. The first limiting block and the second limiting block cooperate to limit the range of rotation of the handle relative to the housing.

7. The anti-shake rotating handle structure of the handheld power tool according to claim 2 or 3, characterized in that, The locking component includes a main body, on which a locking pin and a push plate are provided for insertion and engagement with a locking groove. The push plate extends out of the handle for pushing and pulling by hand. The handle is provided with an opening for the push plate to extend out. A first step is provided between the locking pin and the main body. When the locking pin is inserted into the locking groove, the first step abuts against the housing.

8. The anti-shake rotating handle structure of the handheld power tool according to claim 7, characterized in that, The main body is provided with a front baffle plate located in front of the push plate and a rear baffle plate located behind the push plate. When the push plate is subjected to a backward pushing force, the main body and the locking pin move backward, causing the locking pin to disengage from the locking groove, and the front cover plate moves to the movable opening to form a cover. When the push plate loses force, the second elastic element pushes the main body and the locking pin forward, causing the locking pin to insert into the corresponding locking groove, and the rear baffle moves to the movable opening to form a blockage.

9. The anti-shake rotating handle structure of the handheld power tool according to claim 2, characterized in that, The direction in which the locking element moves relative to the handle is parallel to the rotation axis of the handle.

10. The anti-shake rotating handle structure of the handheld power tool according to claim 5, characterized in that, The handle includes a left half shell and a right half shell. Both the left and right half shells have arc-shaped ribs on their inner walls. When the left and right half shells are joined together, the arc-shaped ribs on the left half shell and the arc-shaped ribs on the right half shell combine to form the inner ring edge.

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