CN115246111A - Mechanism for increasing hammer function of hand tool - Google Patents

Abstract

The present disclosure relates to the field of power tools, and more particularly, to a mechanism for increasing the hammering function of a hand tool. The utility model provides an increase mechanism of handheld tool hammering function, which comprises a housin, main shaft and output mechanism, output mechanism sets up the stopping portion, stopping portion includes the body and stops the ball, the body cover is established on the second rotates the piece, and with the casing rigid coupling, stopping portion has seted up the spacing groove, it sets up in the through-hole to stop the ball, and keep somewhere in the holding step under the state of sticking department and first rotation piece separation, break away from holding step top and get into the spacing inslot and restrict the second and rotate the piece and remove under the state of sticking department and first rotation piece butt. Through implementing this disclosed technical scheme, can switch handheld tool's operating mode at any time, mode is adjusted through non-adjustable ring or regulating switch's mode, can improve work efficiency, and its simple structure is stable, can guarantee better life under high strength operation.

Description

Mechanism for increasing hammer function of hand tool

Technical Field

The present disclosure relates to the field of power tools, and more particularly, to a mechanism for increasing the hammering function of a hand tool.

Background

At present, electric drills on the market are convenient to use in at least two modes, namely a common electric drill mode and an impact mode with impact. The existing electric drill adjusting mode is locked by an adjusting ring knob and an adjusting switch, and an adjusting structure used in the adjusting mode is realized by a rotating structure of a locking part of a clamp spring or a spring catch.

However, the existing adjusting part has single function and poor structural stability, and fine parts are easy to damage to influence construction during high-strength operation.

Disclosure of Invention

In order to solve the technical problem or at least partially solve the technical problem, the present disclosure provides a mechanism for increasing a hammering function of a handheld tool, including a housing, a spindle and an output mechanism, wherein the spindle includes a shaft body, and the spindle is disposed in the housing and is in rotational fit with the housing;

the output mechanism comprises a first rotating piece, a second rotating piece, a locking part, a stopping part and an elastic piece, wherein the elastic piece, the first rotating piece and the locking part are sequentially sleeved on the main shaft, and the elastic piece is abutted against the first rotating piece; the shaft body enables the first rotating piece and the locking part to be axially connected in a sliding mode relative to the main shaft, and enables the main shaft to drive the first rotating piece and the locking part to rotate circumferentially; an accommodating step is circumferentially arranged on one side, close to the first rotating piece, of the locking part, and the accommodating step and the locking part are in slope transition;

the second rotating part is sleeved on the locking part, a first through hole is formed in the side wall of the second rotating part, and an inclined surface mutually coupled with the first rotating part is arranged at the tail end of the second rotating part;

the stopping part comprises a body, a limiting groove and a first stopping part, the body is sleeved on the second rotating part and is fixedly connected with the shell, the limiting groove is formed in the inner wall of the body, the first stopping part is arranged in the first through hole, the locking part is kept on the accommodating step in a moving state towards the elastic part, and the locking part is separated from the accommodating step in a moving state away from the elastic part and enters the limiting groove to limit the second rotating part to rotate.

Optionally, the main shaft further comprises a mounting part, the mounting part is arranged at the end part of the shaft body, a power connecting part is arranged at the end part of the mounting part, and the power connecting part is used for being connected with a power output end of the machine tool.

Optionally, an installation part is arranged on the inner wall of one end of the shell, and the installation part is rotatably connected with the installation part.

Optionally, one end of the first rotating member is provided with a first mounting groove, the power connecting portion is disposed in the first mounting groove, and one end of the elastic member abuts against a groove bottom of the first mounting groove.

Optionally, a first resetting piece is arranged between the locking part and the first rotating piece, and a contraction pressure of the first resetting piece is smaller than that of the elastic piece.

Optionally, the casing cover is provided with a connecting piece, and the inner wall of the connecting piece is provided with a clamping part matched with the tool.

Optionally, a clamping portion is disposed at the other end of the locking portion opposite to the first rotating member, and the clamping portion and the locking portion are integrally formed and expose the housing.

Optionally, the clamping portion includes a clamping cavity, a pressing portion, a second reset member and a second stop member, the clamping cavity and the locking portion are integrally formed, and a second through hole is formed in a wall of the clamping cavity; the pressing part is sleeved on the outer wall of the clamping cavity in a sliding mode, a containing part is arranged on the inner wall of the pressing part, the second reset part is sleeved on the outer wall of the clamping cavity, one end of the second reset part is abutted to the pressing part, the diameter of the second stop part is larger than that of the second through hole, the second stop part is located, under the release state of the second reset part, one part of the second stop part is exposed out of the hole opening of the second through hole, and under the compression state of the second reset part, the second stop part is contained in the containing part and between the second through holes.

Optionally, the second rotates the piece with follow between the inner wall of casing the second rotates a piece circumference and sets up the bearing spare, the bearing spare makes the second rotate the piece and rotates smoothly and/or restriction the second rotates the piece axial displacement.

Optionally, a second mounting groove is formed in one end, opposite to the first rotating member, of the locking portion, a first resetting member is arranged in the second mounting groove, and one end of the first resetting member is abutted to the bottom of the second mounting groove.

Compared with the prior art, the beneficial effect of this disclosure is: according to the electric drill, the switching between the impact mode and the electric drill mode is realized through the structure of the output mechanism, and the efficiency can be improved during operation; the first stop piece is driven to move through pressing to achieve mode switching of the mechanism, so that structural stability under high-strength industry is met, and parts are not prone to damage, so that the service life is prolonged.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic cross-sectional view of the impact shutdown of the present disclosure;

FIG. 2 is a cross-sectional view of an impact state of the present disclosure

FIG. 3 is a second cross-sectional view of the impact state of the present disclosure;

fig. 4 is a schematic perspective view of a locking portion and a clamping cavity of the present disclosure;

FIG. 5 is a cross-sectional schematic view of a locking portion and a clamping cavity of the present disclosure;

FIG. 6 is a schematic structural view of a spindle of the present disclosure;

FIG. 7 is a schematic structural view of a first rotating member of the present disclosure;

FIG. 8 is a schematic view of a second rotatable member of the present disclosure;

FIG. 9 is a schematic cross-sectional view of the spindle, the first rotating member, the second rotating member, the resilient member and the bearing member of the present disclosure;

FIG. 10 is a schematic structural view of a housing of the present disclosure;

FIG. 11 is a schematic view of the construction of the mounting portion of the present disclosure;

FIG. 12 is a schematic structural view of a connector of the present disclosure;

fig. 13 is a schematic structural view of a body and a limiting groove of the stopping portion of the present disclosure.

Wherein, 1-shell; 15-a connector; 2-a main shaft; 21-a shaft body; 22-a mounting; 221-power connection; 3-an output mechanism; 31-a first rotating member; 313-a first mounting slot; 32-a second rotating member; 321-a first via; 323-a bearing member; 33-a locking portion; 331-an accommodation step; 332-a second mounting groove; 34-a stop portion; 340-a body; 341-a limit groove; 342-a first stop; 35-a first restoring member; 36-an elastic member; 4-a mounting portion; 5-a clamping part; 51-a clamping cavity; 511-a second via; 52-a pressing part; 521-a container; 53-a second restoring member; 54-a second stop; b-antiskid hand-held part.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.

It is noted that, in this document, relational terms such as "first" and "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

As shown in fig. 1 to 13, the present disclosure provides a mechanism for increasing a hammering function of a handheld tool, including a housing 1, a spindle 2 and an output mechanism 3, where the spindle 2 is disposed in the housing 1 and is rotationally matched with the housing 1, in a preferred embodiment of the present disclosure, the spindle 2 includes a shaft body 21 and an installation part 22, the installation part 22 is disposed at an end portion of the shaft body 21, an installation part 4 is disposed on an inner wall of one end of the housing 1, the installation part 22 is rotationally matched with the installation part 4 to enable the installation part 22 to rotate independently inside the installation part 4, and the installation part 22 rotatably supports internal components of the hammering mechanism; the mounting part 4 plays a role in fixing the axial horizontal position of the main shaft 2 in the shell 1; furthermore, a power connection part 221 is arranged at one end of the mounting part 22 exposed out of the mounting part 4, preferably, the power connection part 221 is a hexagonal prism or other polygonal structures, wherein end face teeth on the mounting part 4 are meshed with end face teeth on the hand-held tool machine, and the preferred mounting part 4 is connected with the shell 1 through a plug-in key so that the mounting part 4 and the shell 1 cannot rotate relatively; the hexagonal shaft of the power connection portion 221 is connected to a hexagonal hole of the hand-held power tool, and the function of transmitting rotation is completed.

The output mechanism 3 of the present disclosure includes a first rotating member 31, a second rotating member 32, a locking portion 33, a stopping portion 34 and an elastic member 36, wherein the elastic member 36, the first rotating member 31 and the locking portion 33 are sequentially sleeved on the main shaft 2, in the embodiment of the present disclosure, the elastic member 36 is abutted between the first rotating member 31 and the mounting member 22, and the preferable elastic member 36 may be a compression spring, an elastic rubber sleeve, and other structures with resilient performance, and can satisfy the effects of contracting after the first rotating member 31 applies pressure thereto and rebounding after releasing pressure, and the elastic member 36 with adaptive elasticity is selected according to different use requirements;

in a preferred embodiment, one end of the first rotating member 31 is opened with a first mounting groove 313, the elastic member 36 is disposed in the first mounting groove 313, and two ends of the elastic member respectively abut against the bottom of the first mounting groove 313 and the mounting member 22; a second mounting groove 332 is formed in one end, opposite to the first rotating member 31, of the locking portion 33, a first resetting member 35 is arranged in the second mounting groove 332, preferably, two ends of the first resetting member 35 are respectively abutted to the groove bottom of the second mounting groove 332 and the first rotating member 31, the first resetting member 35 can be a compression spring, the setting mode can better realize the conversion of the hammering function, and optionally, the contraction pressure of the first resetting member 35 is smaller than that of the elastic member 36, namely, the first resetting member 35 is easier to be compressed compared with the elastic member 36, so that the elastic member 36 is not compressed as much as possible, and the function switching is independently realized through the locking portion 33; in another embodiment of the present disclosure, the first returning member 35 is not provided, and the locking portion 33 is integrally formed with the first rotating member 31, so that the hammering function can be realized. The purpose of forming the first and second mounting grooves 313 and 332 in the preferred embodiment of the present disclosure is to make the movement state of the elastic member 36 and the first restoring member 35 more stable.

In some embodiments of the present disclosure, the first rotating element 31 and the locking portion 33 are axially slidably connected with respect to the shaft body 21, and the shaft body 21 drives the first rotating element 31 and the locking portion 33 to rotate circumferentially, a groove is provided on a specific shaft body 21, and a protrusion is provided inside the first rotating element 31 and the locking portion 33; or the shaft body 21 is provided with a groove, the first rotating member 31 and the locking part 33 are provided with concave parts inside, and a ball is arranged in the concave part; or the outer part of the shaft body 21 and the inner side of the first rotating member 31 and the locking part 33 are in a matched polygon shape; a preferable connection manner may be that the first rotating member 31 and the locking portion 33 are spline-connected with the shaft body 21;

in a preferred embodiment of the present disclosure, a receiving step 331 is circumferentially disposed on one side of the locking portion 33 close to the first rotating member 31, and the receiving step 331 and the locking portion 33 are in a transition of a slope, which enables the first stopping member 342 to smoothly enter the limiting groove 341 of the stopping portion 34 when the locking portion 33 moves upward toward the first rotating member 31, so as to satisfy smoothness of the switching mode.

The impact function of the present disclosure is realized by the mutual cooperation of the first rotating member 31, the second rotating member 32 and the elastic member 36, the second rotating member 32 is sleeved on the locking portion 33, the second rotating member 32 is provided with a first through hole 321, and the tail end of the second rotating member is provided with an inclined surface mutually coupled with the first rotating member 31. When the second rotating member 32 is restricted from rotating, the first rotating member 31 moves towards the elastic member 36 under the action of the inclined surface where the first rotating member 31 and the second rotating member 32 are coupled, and when the inclined surface rotates to the end, the elastic member 36 is suddenly released, and the first rotating member 31 generates impact motion;

in some embodiments, the stopping portion 34 of the present disclosure includes a body 340, a limiting groove 341 and a first stopping member 342, and preferably, the first stopping member 342 may be a ball-shaped body such as a steel ball to satisfy smoothness of the switching mode, or a stopper capable of moving on a slope; the body 340 is sleeved on the second rotating member 32 and is fixedly connected with the housing 1, the inner wall of the stopping portion 34 is provided with a limiting groove 341, the first stopping member 342 is disposed in the first through hole 321, and in a state that the locking portion 33 is far away from the elastic member 36, the first stopping member 342 is retained on the accommodating step 331, and in a state that the locking portion 33 is moving towards the elastic member 36, the first stopping member 342 is separated from the accommodating step 331 and enters the limiting groove 341 to limit the circumferential rotation of the second rotating member 32.

In a preferred embodiment, a connecting member 15 is fixedly sleeved on an outer wall of one end of the housing 1, which is provided with the mounting portion 4, an inner wall of the connecting member 15 is provided with a clamping portion adapted to a tool, the preferred clamping portion is a buckle, the connecting member 15 is connected with a handheld tool machine, and the connecting member 15 is connected with the handheld tool machine by using the buckle to realize quick connection.

In order to better realize the installation and fixation of the drill bit, the other end of the locking part 33 opposite to the first rotating part 31 is provided with a clamping part 5, the preferred clamping part 5 comprises a clamping cavity 51, a pressing part 52, a second resetting part 53 and a second stopping part 54, the clamping cavity 51 and the locking part 33 are integrally formed and exposed out of the shell 1, and the wall of the clamping cavity 51 is provided with a second through hole 511; the pressing part 52 is slidably sleeved on the outer wall of the clamping cavity 51, the accommodating part 521 is arranged on the inner wall of the pressing part 52, the second resetting part 53 is sleeved on the outer wall of the clamping cavity 51, two ends of the second resetting part are abutted against the pressing part 52 and the locking part 33, and the diameter of the second stopping part 54 is larger than that of the second through hole 511 so as to limit the second stopping part 54 from entering the clamping cavity 51; in the pressed state of the pressing portion 52, the second restoring member 53 is compressed by force, so that the accommodating portion 521 corresponds to the second through hole 511, the second stopping member 54 has a certain mobility between the accommodating portion 521 and the second through hole 511, and the second stopping member 54 can be pressed into the accommodating portion 521 by an inserted drill; in the non-pressed state, the accommodating part 521 is offset from the second through hole 511, the position of the second stopper 54 is fixed due to the reduced space, and a part of the second stopper 54 is exposed out of the opening of the second through hole 511, and the exposed part locks the inserted drill, so that the drill is mounted and fixed.

In some embodiments of the present disclosure, a bearing element 323 is disposed between the second rotating element 32 and the inner wall of the housing 1 along the circumferential direction of the second rotating element 32, the bearing element 323 limits the axial movement of the second rotating element 32, the optional bearing element 323 is a steel ball disposed in the circumferential direction of the second rotating element 32, sliding grooves that are matched with each other are disposed on the inner wall of the housing 1 and the outer wall of the second rotating element 32, the steel ball is disposed in the two sliding grooves, and the bearing element 323 can limit the axial movement of the second rotating element 32, and also can limit the movement of the second rotating element 32 toward the clamping portion 5 or the one-way direction of the mounting portion 4, so as to adapt to the requirements of various embodiments, and the most important function is to enable the second rotating element 32 to rotate smoothly in the housing 1 in a non-hammering state.

In a preferred embodiment of the present disclosure, a non-slip pad a is disposed on a pressing section of the pressing portion 52, so as to achieve an effect of convenient installation, and a non-slip handheld portion B is disposed on an outer wall of the casing 1, so as to better support the drill bit in an impact state.

The specific working conditions are as follows:

in the non-impact state of the present disclosure, the locking portion 33 is separated from the first rotating member 31 by the first restoring member 35 (i.e., the locking portion 33 moves away from the elastic member 36), the receiving step 331 corresponds to the through hole 321, the first stopping member 342 drops from the through hole 321 to the receiving step 331, in this state, the second rotating member 32 can rotate freely in the circumferential direction, and when the machine tool rotates, the main shaft 2 rotates and drives the first rotating member 31, the second rotating member 32, the locking portion 33 and the first stopping member 342 to rotate together. Since the first rotating member 31 and the second rotating member 32 do not rotate relative to each other, the power tool does not generate an impact function.

When the machine tool is equipped with a drill bit and starts to drill, the first reset piece 35 is compressed by pressing the human power to the target object, the locking part 33 moves towards the first rotating piece 31 (i.e. the locking part 33 moves towards the elastic piece 36), and the first stop piece 342 is pushed into the limit groove 341 of the stop part 34 under the action of the slope transition surface of the accommodating step 331 of the locking part 33, and the second rotating piece 32 stops rotating under the action of the first stop piece 342 because the body 340 is fixed with the housing and cannot rotate, and one part of the first stop piece 342 is in the through hole 321 of the second rotating piece 32 and the other part is pushed into the limit groove 341 of the stop part 34. The first rotating member 31 is driven by the main shaft 2 to rotate continuously, so that the first rotating member 31 and the second rotating member 32 rotate relatively, the first rotating member moves towards the direction of the elastic member 36 under the action of the inclined surface where the first rotating member and the second rotating member are coupled, at this time, the elastic member 36 is compressed, when the inclined surface rotates to the end, the elastic member 36 is released suddenly, the first rotating member 31 generates impact motion, the locking part 33 is impacted, and the locking part 33 transmits impact energy to the drill bit, so that the function of impact drilling is realized.

The previous description is only for the purpose of describing particular embodiments of the present disclosure, so as to enable those skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A mechanism for increasing the hammering function of a hand tool is characterized by comprising a shell (1), a main shaft (2) and an output mechanism (3),

the main shaft (2) comprises a shaft body (21), and the main shaft (2) is arranged in the shell (1) and is in running fit with the shell (1);

the output mechanism (3) comprises a first rotating piece (31), a second rotating piece (32), a locking part (33), a stopping part (34) and an elastic piece (36), the first rotating piece (31) and the locking part (33) are sequentially sleeved on the main shaft (2), and the elastic piece (36) is abutted against the first rotating piece (31); the shaft body (21) enables the first rotating piece (31) and the locking part (33) to be axially connected in a sliding mode relative to the main shaft (2), and enables the main shaft (2) to drive the first rotating piece (31) and the locking part (33) to rotate in the circumferential direction; an accommodating step (331) is circumferentially arranged on one side, close to the first rotating piece (31), of the locking part (33), and the accommodating step (331) and the locking part (33) are in slope transition;

the second rotating part (32) is sleeved on the locking part (33), a first through hole (321) is formed in the side wall of the second rotating part (32), and an inclined surface mutually coupled with the first rotating part (31) is formed at the tail end of the second rotating part;

the stopping part (34) comprises a body (340), a limiting groove (341) and a first stopping part (342), the body (340) is sleeved on the second rotating part (32) and is fixedly connected with the shell (1), the limiting groove (341) is arranged on the inner wall of the body (340), the first stopping part (342) is arranged in the first through hole (321), is retained on the accommodating step (331) when the locking part (33) moves towards the elastic part (36), and is separated from the accommodating step (331) to enter the limiting groove (341) to limit the rotation of the second rotating part (32) when the locking part (33) moves away from the elastic part (36).

2. A mechanism for adding a hammer function to a hand tool according to claim 1, wherein the main shaft (2) further comprises a mounting member (22), the mounting member (22) is arranged at an end of the shaft body (21), and a power connecting part (221) is arranged at an end of the mounting member (22), and the power connecting part (221) is used for being connected with a power output end of a machine tool.

3. A mechanism for adding a hammer function to a hand tool according to claim 2, wherein a mounting part (4) is provided on an inner wall of one end of the housing (1), and the mounting part (22) is rotatably connected to the mounting part (4).

4. The mechanism for increasing the hammering function of the handheld tool as claimed in claim 1, wherein one end of said first rotating member (31) is provided with a first mounting groove (313), said power connecting portion (36) is arranged in said first mounting groove (313), and one end of said elastic member (36) is abutted against the groove bottom of said first mounting groove (313).

5. A mechanism for increasing handheld tool hammer function according to claim 1, wherein a first return member (35) is provided between the locking portion (33) and the first rotatable member (31), the first return member (35) having a lower contraction pressure than the resilient member (36).

6. The mechanism for increasing the hammering function of the handheld tool is characterized in that a connecting piece (15) is sleeved and connected on the shell (1), and a clamping portion matched with a tool is arranged on the inner wall of the connecting piece (15).

7. A mechanism for increasing handheld tool hammering function according to claim 1 wherein the other end of the locking portion (33) opposite to the first rotary member (31) is provided with a clamping portion (5), the clamping portion (5) being integrally formed with the locking portion (3) and exposing the housing (1).

8. The mechanism for increasing the hammering function of the handheld tool as claimed in claim 7, wherein said clamping portion (5) comprises a clamping cavity (51), a pressing portion (52), a second reset member (53) and a second stop member (54), said clamping cavity (51) is integrally formed with said locking portion (33), and a second through hole (511) is provided on the groove wall of said clamping cavity (51); the pressing portion (52) is slidably sleeved on the outer wall of the clamping cavity (51), an accommodating portion (521) is arranged on the inner wall of the pressing portion (52), the second reset piece (53) is sleeved on the outer wall of the clamping cavity (51) and one end of the second reset piece is abutted to the pressing portion (52), the diameter of the second stop piece (54) is larger than that of the second through hole (511), the second stop piece (54) is partially exposed out of the hole of the second through hole (511) in the release state of the second reset piece (53), and the second stop piece (54) is accommodated between the accommodating portion (521) and the second through hole (511) in the compression state of the second reset piece (53).

9. A mechanism for increasing hand tool hammering function according to claim 1 wherein a bearing member (323) is provided between the second rotational member (32) and the inner wall of the housing (1) along the circumference of the second rotational member (32), the bearing member (323) smoothens the rotation of the second rotational member (32) and/or limits the axial movement of the second rotational member (32).

10. The mechanism for increasing hammer function of a handheld tool as recited in claim 1, wherein an end of the locking portion (33) opposite to the first rotating member (31) is provided with a second mounting groove (332), a first resetting member (35) is arranged in the second mounting groove (332), and one end of the first resetting member (35) abuts against a groove bottom of the second mounting groove (332).

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