Auxiliary handle member and power tool

Abstract

The present invention relates to an auxiliary handle member and a power tool. The auxiliary handle member includes a handle portion extending axially and a fixing member connected to an axial end of the handle portion. The fixing member connects the auxiliary handle member to the power tool. The auxiliary handle member further includes an adjusting member located between the fixing member and the power tool. The adjusting member has a locked state and an unlocked state. When the adjusting member is in the locked state, the adjusting member abuts against the fixing member to fix the fixing member to the power tool. When the adjusting member is in the unlocked state, the adjusting member disengages from the fixing member and remains in the unlocked state to enable the fixing member to rotate freely relative to the power tool. In the present invention, by pressing the adjusting member, the fixing member can be conveniently controlled to be in the locked state or the unlocked state, so as to facilitate the operator to switch the angle of the auxiliary handle member, and the operation is simpler.

Description

Technical Field

[0001] The present invention relates to a power tool, and particularly to a power tool with an auxiliary handle member.

Background Art

[0002] Power tools for grooving are mainly used in industries such as decoration and construction. They are used to process grooves on the surfaces of walls, floors, etc. to accommodate wires, water pipes, etc. During the operation of such power tools, the operator operates by grasping the holding part at the rear end. However, since the body of the grooving machine is heavy, it is very inconvenient for users to operate the grooving machine with only one hand.

[0003] For the improvement of the above structure, reference can be made to U.S. Patent No. US9009982B1 announced on April 21, 2015, which discloses a cutting tool including a detachable auxiliary handle and a threaded handle hole provided at the working end of the housing. The auxiliary handle is attached in the threaded handle hole to provide an auxiliary grip for the operator during use. The above technical solution uses an auxiliary handle to provide additional holding to improve stability and facilitate the balance and control of the cutting tool. However, when screwing the auxiliary handle into the threaded handle hole, it takes a lot of time, and the installation and disassembly are not convenient; at the same time, the auxiliary handle can only be fixedly set at one angle and cannot meet the operation needs of different users.

[0004] In view of this, it is necessary to provide an improved auxiliary handle member and a power tool to overcome the defects of the prior art.

Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide an auxiliary handle member with multi-angle adjustment and comfortable operation and a power tool with the auxiliary handle member.

[0006] The present invention can solve the problems of the prior art by adopting the following technical solutions: An auxiliary handle member is connected to a power tool. The auxiliary handle member includes a handle portion extending axially and a fixing member connected to an axial end of the handle portion. The fixing member connects the auxiliary handle member to the power tool. The auxiliary handle member further includes an adjusting member located between the fixing member and the power tool. The adjusting member has a locked state and an unlocked state. When the adjusting member is in the locked state, the adjusting member abuts against the fixing member to fix the fixing member to the power tool. When the adjusting member is in the unlocked state, the adjusting member disengages from the fixing member and maintains the unlocked state to enable the fixing member to rotate freely relative to the power tool.

[0007] A further improvement solution is as follows: The adjusting component has a button installed inside the fixing component and a first elastic element that biases the button. One end of the first elastic element abuts against the button, and the other end abuts against the outer wall of the power tool.

[0008] A further improvement solution is as follows: The fixing component has a connecting sleeve that extends axially and is cylindrical, and a clamping leg and a supporting wall located at both axial ends of the connecting sleeve respectively. The clamping leg protrudes outward from the outer periphery of the connecting sleeve and is inserted into the power tool. The supporting wall is formed by extending inward from the inner wall of the connecting sleeve. The button is received inside the connecting sleeve and abuts against the supporting wall via the first elastic element.

[0009] A further improvement solution is as follows: The button has a pressing portion that protrudes from the fixing component, a connecting portion that extends axially from the pressing portion, and a recess that is recessed from the inner wall of the connecting portion. The adjusting component has a support pillar fixed to the power tool and a first rolling body installed inside the support pillar. The first rolling body is in form-fit engagement with the recess.

[0010] A further improvement solution is as follows: The support pillar is provided with a second groove that is recessed inward from the end face. The adjusting component has a locking button received inside the second groove, a second rolling body installed inside the support pillar, and a second elastic element located between the locking button and the support pillar. One end of the second elastic element abuts against the bottom surface of the second groove, and the other end abuts against the inner wall surface of the locking button. The locking button has a transition groove that is recessed inward from the outer periphery. The second rolling body is received inside the transition groove.

[0011] A further improvement solution is as follows: The adjusting component has a third elastic element received inside the support pillar. The first rolling body and the second rolling body are respectively located at both ends of the third elastic element. The support pillar is provided with a through hole that penetrates the side wall and communicates with the second groove. The first rolling body, the third elastic element, and the second rolling body are all received inside the through hole.

[0012] A further improvement solution is as follows: When the adjusting component is in the locked state, the first rolling body disengages from the recess and abuts against the inner wall surface of the connecting portion. The second rolling body disengages from the transition groove and abuts against the outer wall surface of the locking button. The first elastic element is in a first compressed state.

[0013] A further improvement solution is as follows: When the adjusting component is in the unlocked state, the first rolling body is radially locked inside the recess. The first elastic element is in a second compressed state. The resilience of the first elastic element in the second compressed state is greater than the resilience of the first elastic element in the first compressed state.

[0014] A further improvement solution is as follows: when the adjusting component switches from the locked state to the unlocked state, the first elastic element is compressed to the third pressing state and then rebounds to the first pressing state. The resilience of the first elastic element in the third pressing state is greater than that in the second pressing state. The second rolling body is pressed into the transition groove, and the second elastic element is compressed to have resilience. The first rolling body disengages from the recess via the resilience of the first elastic element in the third pressing state, and the second rolling body disengages from the transition groove via the resilience of the second elastic element.

[0015] A further improvement solution is as follows: the button has a clamping wing protruding outward from the outer periphery of the pressing part, and the fixing component has a clamping groove recessed inward from the inside of the supporting wall. The clamping wing and the clamping groove are in shape locking.

[0016] The present utility model can also adopt the following technical solution to solve the problems of the prior art: a power tool, including a guard assembly and an auxiliary handle member connected to the guard assembly; the auxiliary handle member includes a handle part, a fixing component connected to the handle part, and an adjusting component located between the fixing component and the guard assembly. The fixing component and the adjusting component lock the auxiliary handle member to the guard assembly. When the adjusting component is pressed relative to the fixing component, the fixing component rotates relative to the guard assembly.

[0017] Compared with the prior art, the present invention has the following beneficial effects: by pressing the adjusting component, it is possible to conveniently control the fixing component to be in the locked state or the unlocked state, so as to facilitate the operator to switch the angle of the auxiliary handle member, and the operation is simpler. At the same time, when the adjusting component is in the unlocked state, the first rolling body is locked in the recess, which can keep the adjusting component in the unlocked state without the operator pressing for a long time, and the operator experience is better.

Description of the Drawings

[0018] The following further describes the specific embodiments of the present invention in detail with reference to the drawings:

[0019] Figure 1 is a schematic diagram of the overall structure of the power tool of the present invention;

[0020] Figure 2 is Figure 1 a schematic diagram of the structure of the power tool shown after removing the housing;

[0021] Figure 3 is Figure 1 a cross-sectional view of the power tool shown;

[0022] Figure 4 isFigure 3 Schematic diagram of the adjusting assembly in the cutting device shown in the first state;

[0023] Figure 5 is Figure 4 Schematic diagram of the adjusting assembly in another state;

[0024] Figure 6 is Figure 3 Schematic diagram of the locking shaft mechanism in the cutting device shown;

[0025] Figure 7 is Figure 4 Schematic diagram of the outer sleeve in the adjusting assembly shown;

[0026] Figure 8 is Figure 4 Schematic diagram of the connection between the inner sleeve and the outer sleeve in the adjusting assembly shown;

[0027] Figure 9 is Figure 1 Exploded view of the auxiliary handle component in the power tool shown;

[0028] Figure 10 is Figure 9 Schematic diagram of the structure where the button is engaged with the second fixing part in the auxiliary handle component shown;

[0029] Figure 11 is Figure 9 Cross-sectional view of the adjusting part in the locked state;

[0030] Figure 12 is Figure 9 Cross-sectional view of the adjusting part in the unlocked state;

[0031] Figure 13 is Figure 9 Cross-sectional view of the adjusting part in the switching intermediate state.

[0032] Power tool 100, housing 1

[0033] Main housing 11, gripping part 12

[0034] Head housing 13, head housing cover 14

[0035] Air inlet 15, air outlet 16

[0036] Motor assembly 2, rotating shaft 21

[0037] Reduction mechanism 3, output shaft 4

[0038] Adjusting assembly 5, inner pressure plate 51

[0039] Base 511, first mounting part 512

[0040] The outer pressing plate 52 of the second installation part 513

[0041] The locking part 521 and the third installation part 522

[0042] The cutting disc 53 and the first cutting disc 531

[0043] The second cutting disc 532 and the sleeve assembly 54

[0044] The first clamping part 541 and the first base plate 5411

[0045] The first connecting part 5412 and the fixing hole 5413

[0046] The second clamping part 542 and the second base plate 5421

[0047] The second connecting part 5422 and the mark 5423

[0048] The indicating line 5424 and the shield assembly 6

[0049] The insertion slot 61 and the cover body 62

[0050] The hoop 63 and the auxiliary handle member 7

[0051] The handle part 71 and the first fixing part 72

[0052] The bending part 73 and the second fixing part 74

[0053] The connecting sleeve 741 and the clamping leg 742

[0054] The supporting wall 743 and the clamping groove 744

[0055] The button 75 and the pressing part 751

[0056] The clamping wing 752 and the connecting part 753

[0057] The first groove 754 and the annular groove 755

[0058] The recess 756 and the first elastic element 76

[0059] The support column 77 and the second groove 771

[0060] The through hole 772 and the first rolling body 78

[0061] The lock button 79 and the transition groove 791

[0062] The third groove 792 and the lock body 793

[0063] The second elastic element 80 and the second rolling body 81

[0064] The third elastic element 82, the fan assembly 9

[0065] The shaft locking mechanism 101, the clamping portion 1011

[0066] The locking button 1012, the spring 1013

Detailed implementation manners

[0067] The present invention will be further described in detail below in conjunction with the accompanying drawings and implementation manners.

[0068] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. For example, the terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship are only based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device / component referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0069] Please refer to Figures 1 to 3 As shown, the implementation manner of the present invention relates to a power tool 100, especially a grooving machine, which is widely used in occasions such as construction and decoration. The power tool 100 includes a housing 1, a motor assembly 2 installed in the housing 1, an output shaft 4 driven by the motor assembly 2, a reduction mechanism 3 connected between the motor assembly 2 and the output shaft 4, a fan assembly 9 installed on the motor assembly 2, a guard assembly 6 installed on the housing 1, and an adjustment assembly 5 connected to the output shaft 4. The adjustment assembly 5 installs a cutting blade 53 on the output shaft 4. The motor assembly 2 is started under the action of a power source, drives the reduction mechanism 3 and drives the output shaft 4 to rotate, so as to drive the cutting blade 53 to rotate at a high speed for cutting operations.

[0070] In the present implementation manner, the above-mentioned housing 1 includes a main housing 11 extending in the front-rear direction and having a longitudinal shape, a holding portion 12 extending rearward from the main housing 11, a head housing 13 connected to the front end of the main housing 11, and a head housing cover 14 fixedly connected to the head housing 13. The motor assembly 2 is disposed in the main housing 11, the reduction mechanism 3 and the output shaft 4 are disposed in the head housing 13. The rotating shaft 21 of the motor assembly 2 extends into the head housing 13 and meshes with the reduction mechanism 3; the output shaft 4 and the rotating shaft 21 are disposed substantially perpendicular to each other. One end of the output shaft 4 is connected to the reduction mechanism 3, and the other end protrudes outside the head housing 13. A cutting blade 53 and an adjustment assembly 5 are installed on the output shaft 4 protruding outside the head housing 13. The output shaft 4 drives the cutting blade 53 and the adjustment assembly 5 to rotate together.

[0071] In this embodiment, the above-mentioned shield assembly 6 is installed at the end of the head shell 13 and at least partially surrounds the cutting blade 53 to prevent the cutting blade 53 from causing harm to the user during operation. In combination with Figure 4 As shown, the shield assembly 6 has a housing 63 for receiving the cutting blade 53, a hoop 63 protruding outward from the end face of the housing 63, and a plug-in slot 61 penetrating the end face of the housing 63. The hoop 63 is fixed to the outer periphery of the head shell cover 14 to fix the shield assembly 6 to the head shell cover 14.

[0072] In this embodiment, the above-mentioned fan assembly 9 is installed on the rotating shaft 21. The machine shell 1 is further provided with an air inlet 15 and an air outlet 16. Specifically, the air inlet 15 is opened on the main body shell 11, and the air outlet 16 is opened on the head shell 13. The motor assembly 2 drives the fan assembly 9 to operate. The cooling air is inhaled through the air inlet 15, flows through the motor assembly 2, and then is discharged from the air outlet 16 to better cool the motor assembly 2.

[0073] Please refer to Figures 4 to 8 As shown, the above-mentioned adjusting assembly 5 includes an inner pressing plate 51 connected to the output shaft 4, an outer pressing plate 52 fixing the inner pressing plate 51, and a sleeve assembly 54 installed on the inner pressing plate 51. The cutting blade 53 includes a first cutting blade 531 installed on the inner pressing plate 51 and a second cutting blade 532 away from the first cutting blade 531. The first cutting blade 531 and the second cutting blade 532 are spaced apart by a certain distance, and the distance between the outermost sides of the two cutting blades is the cutting width L. The sleeve assembly 54 connects the first cutting blade 531 and the second cutting blade 532 and adjusts the distance between the first cutting blade 531 and the second cutting blade 532. By arranging the sleeve assembly 54 between the first cutting blade 531 and the second cutting blade 532, the cutting width L between the first cutting blade 531 and the second cutting blade 532 can be arbitrarily adjusted, greatly improving the applicability of the power tool 100 and meeting the diverse needs of users.

[0074] Specifically, the above-mentioned sleeve assembly 54 includes a first clamping member 541 connected to the first cutting blade 531 and a second clamping member 542 connected to the second cutting blade 532. The first clamping member 541 and the second clamping member 542 can be detachably fixedly connected in any way. Specifically, the first clamping member 541 is an inner sleeve, and the second clamping member 542 is an outer sleeve.

[0075] Further, the inner sleeve 541 includes a first substrate 5411 connected to the first cutting blade 531 and a first connecting portion 5412 extending from the end face of the first substrate 5411 toward the outer sleeve 542. The outer sleeve 542 includes a second substrate 5421 connected to the second cutting blade 532 and a second connecting portion 5422 extending from the end face of the second substrate 5421 toward the inner sleeve 541. The first connecting portion 5412 and the second connecting portion 5422 are detachably and fixedly connected, and the first connecting portion 5412 and the second connecting portion 5422 constitute an adjustment assembly for adjusting the distance between the first cutting blade 531 and the second cutting blade 532. A connecting portion for mutual connection is provided between the inner sleeve 541 and the outer sleeve 542 to achieve the fixation and disassembly of the inner and outer sleeves in a simple manner.

[0076] In this embodiment, the inner sleeve 541 includes a fixing hole 5413 penetrating through the first connecting portion 5412. A screw passes through the fixing hole 5413 and extends to the second connecting portion 5422 to fix the inner sleeve 541 and the outer sleeve 542 together. When it is necessary to change the cutting width L, only loosen the screw, then adjust the distance between the first cutting blade 531 and the second cutting blade 532, and finally tighten the screw again. It is not necessary to disassemble the outer pressing plate 52 for adjustment, and the structure is simple and the operation is easy.

[0077] Alternatively, the first connecting portion 5412 has a first thread, and the second connecting portion 5422 has a second thread, and the two connecting portions are connected together via the thread.

[0078] Please refer to Figure 7 and Figure 8 As shown, the second connecting portion 5422 is located inside the first connecting portion 5412. Further, the outer sleeve 542 further includes an indicating line 5424 provided on the outer peripheral wall of the second connecting portion 5422 and a mark 5423 corresponding to the indicating line 5424. There are multiple indicating lines 5424 and they are spaced along the axis of the output shaft 4. By providing the indicating line 5424 and the mark 5423 on the second connecting portion 5422 of the outer sleeve 542, the cutting width L between the first cutting blade 531 and the second cutting blade 532 is accurately shown to the user, which is more intuitive for the user when adjusting the cutting width L and the user experience is good.

[0079] In this embodiment, there are multiple marks 5423 and they are spaced along the circumference of the second connecting portion 5422; while the indicating line 5424 surrounds the entire outer peripheral wall of the second connecting portion 5422 so that the user can observe the indicating line 5424 at any angle.

[0080] Please refer to Figure 4 and Figure 5As shown in the figure, the sum of the thickness of the first cutting blade 531, the thickness of the first substrate 5411, and the length of the first connecting portion 5412 is L1, the sum of the thickness of the second cutting blade 532, the thickness of the second substrate 5421, and the length of the second connecting portion 5422 is L2, and the distance between the end of the first connecting portion 5412 and the end of the second connecting portion 5422 is L3. Among them, the values of L1 and L2 are fixed, and the value of L3 changes with the adjustment of the position of the cutting blade. The cutting width L = L1 + L2 - L3. According to this formula, the numerical calibration of the indicating line 5424 and the identifier 5423 can be calculated.

[0081] In this embodiment, the inner pressing plate 51 includes a base portion 511 connected to the output shaft 4, a first mounting portion 512 extending axially along the output shaft 4 from the end of the base portion 511, and a second mounting portion 513 extending radially outward along the output shaft 4 from the end face of the base portion 511. The first cutting blade 531, the inner sleeve 541, the second cutting blade 532, and the outer sleeve 542 are all sleeved on the outer periphery of the first mounting portion 512 and are mounted on the first mounting portion 512.

[0082] In this embodiment, the outer pressing plate 52 includes a locking portion 521 abutting against the first mounting portion 512 and a third mounting portion 522 extending from the end face of the locking portion 521 toward the base portion 511. The third mounting portion 522 is located inside the first mounting portion 512, and the third mounting portion 522 is fixed to the output shaft 4. Specifically, a first thread is provided on the inner wall surface of the third mounting portion 522 close to the output shaft 4, and a second thread is provided on the outer peripheral surface of the corresponding output shaft 4. The locking portion 521 of the outer pressing plate 52 presses against the first mounting portion 512 of the inner pressing plate 51 and locks the inner pressing plate 51 to the output shaft 4 through threaded connection.

[0083] Please refer to Figure 4 and Figure 5 As shown in the figure, the first substrate 5411, the first cutting blade 531, and the second mounting portion 513 are fixed together by screws, and the second substrate 5421 and the second cutting blade 532 are also fixed together by screws. Since the inner pressing plate 51 is fixed to the output shaft 4 and the first connecting portion 5412 of the inner sleeve 541 and the second connecting portion 5422 of the outer sleeve 542 are also fixed, the first cutting blade 531 and the second cutting blade 532 can maintain a stable state.

[0084] In this embodiment, along the axial direction of the output shaft 4, the first cutting blade 531, the second cutting blade 532, the inner sleeve 541, and the outer sleeve 542 are all located between the second mounting portion 513 and the locking portion 521.

[0085] Please also refer to Figure 6As shown, the above-mentioned power tool 100 further includes a locking shaft mechanism 101 connected to the reduction mechanism 3. The reduction mechanism 3 includes a card slot that is recessed inward; the locking shaft mechanism 101 includes a clamping portion 1011 extending into the card slot, a locking button 1012 connected to the end of the clamping portion 1011, and a spring 1013 biasing the locking button 1012. The locking button 1012 extends to the outside of the housing 1 for the user to press. The user presses the locking button 1012 against the force of the spring 1013, driving the clamping portion 1011 to engage in the card slot, and then the adjustment assembly 5 can be disassembled.

[0086] Please refer to Figures 9 to 11 As shown, the power tool 100 further includes an auxiliary handle member 7 connected to the guard assembly 6. The auxiliary handle member 7 is used to provide an additional grip for the operator, facilitating the control of the power tool 100.

[0087] Specifically, the auxiliary handle member 7 includes a handle portion 71 extending axially, a fixing member connected to one axial end of the handle portion 71, and an adjusting member located between the fixing member and the guard assembly. The fixing member and the adjusting member lock the auxiliary handle member 7 to the guard assembly 6. By pressing the adjusting member, the fixing member can rotate relative to the guard assembly 6.

[0088] Specifically, the adjusting member has a locked state and an unlocked state. When the adjusting member is in the locked state, the adjusting member abuts against the fixing member to fix the fixing member to the guard assembly 6; when the adjusting member is in the unlocked state, the adjusting member disengages from the fixing member and remains in the unlocked state, enabling the fixing member to move freely relative to the guard assembly 6, that is, to rotate around an axis parallel to the axis where the output shaft 4 is located.

[0089] In this embodiment, the handle portion 71 is located above the guard assembly 6 to prevent the operator from accidentally touching the cutting blade 53. Combining Figure 1 and Figure 2 As shown, the handle portion 71 is located at the front end of the main housing 11 and is disposed substantially perpendicular to the rotating shaft 21. The operator holds the handle portion 71 at the front end with one hand and the gripping portion 12 at the rear end with the other hand, which can relieve the hand fatigue caused by the forward tilt of the center of gravity of the power tool.

[0090] In this embodiment, the above-mentioned fixing member has a first fixing portion 72 connected to the handle portion 71, a second fixing portion 74 connected to the guard assembly 6, and a bent portion 73 located between the first fixing portion 72 and the second fixing portion 74. The handle portion 71 is threadedly connected to the first fixing portion 72 and is connected to the guard assembly 6 via the bent portion 73 and the second fixing portion 74. The handle portion 71 can rotate above the guard assembly 6 without interfering with the guard assembly 6.

[0091] Specifically, the second fixing part 74 has a connecting sleeve 741 that extends axially and is cylindrical, a clamping leg 742 and a supporting wall 743 respectively located at both axial ends of the connecting sleeve 741, and a plurality of clamping grooves 744 that are recessed inward from the inside of the supporting wall 743. The clamping leg 742 protrudes outward from the outer periphery of the connecting sleeve 741 and is inserted into the insertion groove 61, and the supporting wall 743 extends inward from the inner wall of the connecting sleeve 741. The snap - type installation method of the clamping leg 742 is simple and convenient, facilitating installation and disassembly.

[0092] In this embodiment, the above - mentioned adjusting component has a button 75 installed in the connecting sleeve 741, a first elastic element 76 that biases the button 75, a support pillar 77 fixed to the cover body 62, a first rolling body 78, a second rolling body 81 and a third elastic element 82 installed in the support pillar 77, a locking button 79 housed in the support pillar 77, and a second elastic element 80 located between the locking button 79 and the support pillar 77.

[0093] Specifically, the button 75 has a pressing part 751 that protrudes from the surface of the connecting sleeve 741, a clamping wing 752 that protrudes radially outward from the outer periphery of the pressing part 751, a connecting part 753 that extends axially from the pressing part 751, an annular groove 755 formed between the pressing part 751 and the connecting part 753, a first groove 754 that is recessed inward from the end face of the connecting part 753, and a recess 756 that is recessed from the inner wall of the connecting part 753. The clamping wing 752 is housed in the clamping groove 744 and is shape - locked with the clamping groove 744 to prevent the fixed part from shifting. At the same time, the first elastic element 76 is housed in the annular groove 755, one end of which abuts against the pressing part 751, and the other end abuts against the outer wall of the cover body 62, and the first elastic element 76 is in a first compressed state. The first elastic element 76 pushes the pressing part 751 towards the supporting wall 743, so that the clamping leg 741 abuts against the inner wall of the cover body 62, and the fixed part remains stationary relative to the shield assembly 6. The first groove 754 is sleeved on the outer periphery of the support pillar 77. By pressing the pressing part 751, the button 75 can slide along the outer peripheral surface of the support pillar 77 to guide the button 75.

[0094] In this embodiment, the above - mentioned support pillar 77 has a second groove 771 that is recessed inward from the end face and a through - hole 772 that penetrates the side wall of the support pillar 77 and communicates with the second groove 771. The second elastic element 80 is located between the support pillar 77 and the locking button 79, one end of which abuts against the bottom surface of the second groove 771 and the other end abuts against the inner wall surface of the locking button 79. The locking button 79 can slide along the inner wall of the support pillar 77. The first rolling body 78, the third elastic element 82 and the second rolling body 81 are all housed in the through - hole 722. The third elastic element 82 abuts the first rolling body 78 against the inner wall of the connecting part 753 and abuts the second rolling body against the outer wall of the locking button 79. At this time, the third elastic element 82 is in a pre - compressed state.

[0095] In this embodiment, the above-mentioned lock button 79 is installed in the accommodation cavity formed by the button 75 and the support column 77. The lock button 79 has a cylindrical lock body 793, a transition groove 791 that is recessed inward from the outer periphery of the lock body 793, and a third groove 792 that is recessed inward from the end face. The second elastic element 80 is housed in the third groove 792 and is guided by the inner wall of the lock body 793. One end of the second elastic element 80 abuts against the bottom surface of the second groove 771, and the other end abuts against the inner wall surface of the lock body 793. At this time, the second elastic element 80 is in a non-preloaded state.

[0096] As shown in combination with Figure 11 When the adjustment member is in the locked state, the pressing portion 751 and the support wall 743 are biased by the first elastic element 76 so that the two are away from the shield assembly 6 and are in close contact. At the same time, the locking wing 752 is locked in the card slot 744.

[0097] Specifically, the first rolling body 78 disengages from the recess 756 and abuts against the inner wall surface of the connecting portion 753. The second rolling body 81 disengages from the transition groove 791 and abuts against the outer wall surface of the lock body 793. At this time, the first elastic element 76 is in the initial first compression state, the second elastic element 80 is in a non-compressed state, and the third elastic element 82 is in a preloaded state.

[0098] As shown in combination with Figure 12 When the operator adjusts the angle of the auxiliary handle member 7, the pressing portion 751 is pressed to overcome the resilience of the first elastic element 76. The connecting portion 753 slides along the outer peripheral surface of the support column 77 toward the shield assembly 6. The third elastic element 80 biases the first rolling body 78 toward the connecting portion 753 until the first rolling body 78 is radially locked into the recess 756 so that the adjustment member is in the unlocked state as shown in Figure 12 That is, the fixed member can rotate freely to switch to a comfortable holding angle. At this time, the third elastic element 80 is in a non-preloaded state. Specifically, the locking wing 752 is away from the card slot 744, and there is a gap between the locking wing 752 and the inner wall of the support wall 743. The first rolling body 78 and the recess 756 can keep the adjustment member in the unlocked state until the operator presses the pressing portion 751 again to switch. At this time, the first elastic element 76 is in the second compression state, and the resilience of the first elastic element 76 in the second compression state is greater than the resilience of the first elastic element 76 in the first compression state. There is a gap between the lock button 79 and the inner wall of the pressing portion 751, and the second elastic element 80 is in a non-compressed state.

[0099] As shown in combination with Figure 13As shown, when the adjusting component switches from the unlocked state to the locked state, the pressing portion 751 is pressed again. The inner walls of the pressing portion 751 are engaged and drive the locking button 79 to move towards the shield assembly 6, biasing the second elastic element 80 to the compressed state, so that the second rolling body 78 slides into the transition groove 791, and the first rolling body 78 disengages from the recess 756. The adjusting component is in the switching intermediate state as shown in Figure 13 At this time, the first elastic element 76 is in the third compressed state and the third elastic element 82 is in the non-preloaded state. Since the resilience of the first elastic element 76 in the third compressed state is much greater than the resilience of the second elastic element 80 in the compressed state. When the operator releases the pressing portion 751, the first elastic element 76 quickly rebounds from the third compressed state to the first compressed state, and the connecting portion 753 slides away from the shield assembly 6. Since the third elastic element 82 is in the non-compressed state, when the connecting portion 753 slides past the position where the first rolling body 78 is located, the first rolling body 78 will not be pushed into the recess 756 again; at the same time, when the second elastic element 80 rebounds to the non-compressed state, it drives the second rolling body 81 to slide out of the transition groove 791.

[0100] In the present invention, the fixed component can be conveniently controlled to enter the locked state or the unlocked state by pressing the adjusting component, so as to facilitate the operator to switch the angle of the auxiliary handle member 7, and the operation is simpler; at the same time, when the adjusting component is in the locked state, the first rolling body 78 is locked in the recess 756, so that the adjusting component can be kept in the unlocked state without the operator pressing for a long time, and the operator experience is better.

[0101] The present invention is not limited to the above specific embodiments. It can be easily understood by those of ordinary skill in the art that, without departing from the principle and scope of the present invention, there are many other alternative solutions for the auxiliary handle member and the power tool of the present invention. The protection scope of the present invention shall be subject to the content of the claims.

Claims

1. An auxiliary handle member is connected to a power tool. The auxiliary handle member includes a handle portion extending axially and a fixing member connected to an axial end of the handle portion. The fixing member connects the auxiliary handle member to the power tool. It is characterized in that: The auxiliary handle member further includes an adjusting member located between the fixed member and the power tool. The adjusting member has a button installed in the fixed member, a first elastic element biasing the button, a support column fixed to the power tool, a first rolling body installed on the support column, and a third elastic element. The fixed member has a connecting sleeve, a clamping foot and a support wall connected to the connecting sleeve. The clamping foot is inserted into the power tool. The adjusting member has a locked state and an unlocked state. When the adjusting member is in the locked state, the button and the support wall are biased by the first elastic element, and the button abuts against the support wall so that the fixed member is fixed to the power tool. When the adjusting member is in the unlocked state, the first elastic element is compressed, the button disengages from the support wall, and the third elastic element abuts the first rolling body against the concave portion of the button, and the adjusting member maintains the unlocked state so that the fixed member can rotate freely relative to the power tool.

2. The auxiliary handle member according to claim 1, characterized in that: One end of the first elastic element abuts against the button, and the other end abuts against the outer wall of the power tool.

3. The auxiliary handle member according to claim 2, characterized in that: The fixed member has a connecting sleeve extending axially and having a cylindrical shape, and a clamping foot and a support wall respectively located at two axial ends of the connecting sleeve. The clamping foot protrudes outward from the outer periphery of the connecting sleeve and is inserted into the power tool. The support wall extends inward from the inner wall of the connecting sleeve. The button is received in the connecting sleeve and abuts against the support wall via the first elastic element.

4. The auxiliary handle member according to claim 2, characterized in that: The button has a pressing portion protruding from the fixed member, a connecting portion axially extending from the pressing portion, and a concave portion recessed from the inner wall of the connecting portion. The first rolling body is in form-fit engagement with the concave portion.

5. The auxiliary handle member according to claim 4, characterized in that: The support column is provided with a second groove recessed inward from the end face. The adjusting member has a locking button received in the second groove, a second rolling body installed in the support column, and a second elastic element located between the locking button and the support column. One end of the second elastic element abuts against the bottom surface of the second groove, and the other end abuts against the inner wall surface of the locking button. The locking button has a transition groove recessed inward from the outer periphery, and the second rolling body is received in the transition groove.

6. The auxiliary handle member according to claim 5, characterized in that: The first rolling body and the second rolling body are respectively located at two ends of the third elastic element. The support column is provided with a through hole penetrating the side wall and communicating with the second groove. The first rolling body, the third elastic element and the second rolling body are all received in the through hole.

7. The auxiliary handle member according to claim 5, characterized in that: When the adjusting member is in the locked state, the first rolling body disengages from the concave portion and abuts against the inner wall surface of the connecting portion, the second rolling body disengages from the transition groove and abuts against the outer wall surface of the locking button, and the first elastic element is in a first compressed state.

8. The auxiliary handle member according to claim 7, characterized in that: When the adjusting member is in the unlocked state, the first rolling body is radially locked in the concave portion, the first elastic element is in a second compressed state, and the resilience of the first elastic element in the second compressed state is greater than the resilience of the first elastic element in the first compressed state.

9. The auxiliary handle member according to claim 8, characterized in that: When the adjusting member switches from the locked state to the unlocked state, the first elastic element is compressed to the third pressing state and then rebounds to the first pressing state. The resilience of the first elastic element in the third pressing state is greater than that in the second pressing state. The second rolling body is pressed into the transition groove, and the second elastic element is compressed to have resilience. The first rolling body disengages from the recess via the resilience of the first elastic element in the third pressing state, and the second rolling body disengages from the transition groove via the resilience of the second elastic element.

10. The auxiliary handle member according to claim 3, characterized in that: The button has a locking wing protruding outward from the outer periphery of the pressing portion, and the fixing member has a locking groove recessed inward from the inside of the support wall. The locking wing and the locking groove are in shape engagement.

11. A power tool includes a guard assembly and an auxiliary handle member connected to the guard assembly. It is characterized in that: The auxiliary handle member includes a handle portion, a fixing member connected to the handle portion, and an adjusting member located between the fixing member and the shield assembly. The fixing member and the adjusting member lock the auxiliary handle member to the shield assembly. The adjusting member has a button installed in the fixing member, a first elastic element biasing the button, a support column fixed to the power tool, and a first rolling body and a third elastic element installed on the support column. The fixing member has a connecting sleeve, a locking leg and a support wall connected to the connecting sleeve. The locking leg is inserted into the power tool. When the adjusting member is pressed relative to the fixing member, the first elastic element is compressed, the button disengages from the support wall, and the third elastic element abuts the first rolling body against the recess of the button. The adjusting member remains in the unlocked state, and the fixing member rotates relative to the shield assembly.

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