Mechanism for adding a hammering function to a hand tool

Abstract

The present disclosure relates to the technical field of power tools, and particularly to a mechanism for adding a hammering function to a hand-held tool. The present disclosure provides a mechanism for adding a hammering function to a hand-held tool, including a housing, a main shaft, and an output mechanism. The output mechanism is provided with a stopping portion. The stopping portion includes a body and a stopping ball. The body is sleeved on a second rotating member and fixedly connected to the housing. The stopping portion is provided with a limiting groove. The stopping ball is arranged in a through hole and stays in the accommodating step in a state where the locking portion is separated from the first rotating member. In a state where the locking portion abuts against the first rotating member, it disengages from the top of the accommodating step and enters the limiting groove to restrict the movement of the second rotating member. By implementing the technical solution of the present disclosure, the working mode of the hand-held tool can be switched at any time, and the mode can be adjusted by means of a non-adjusting ring or an adjusting switch, which can improve the working efficiency. Its structure is simple and stable, and it can ensure a better service life under high-intensity operations.

Description

Technical Field

[0001] The present disclosure relates to the technical field of power tools, and particularly to a mechanism for adding a hammering function to a hand-held tool. Background Art

[0002] Currently, electric drills on the market provide at least two modes for convenient use, namely the normal electric drill mode and the impact mode with impact. The existing electric drill adjustment mode is adjusted by an adjustment ring knob and an adjustment switch lock, and the adjustment structure used in the above adjustment method utilizes a circlip or a spring retaining piece to lock a part of the rotating structure.

[0003] However, the existing adjustment components have a single function and poor structural stability, and the fine components are prone to damage during high-intensity operations, which affects the construction. Summary of the Invention

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a mechanism for adding a hammering function to a hand-held tool, including a housing, a main shaft, and an output mechanism. Among them, the main shaft includes a shaft body, the main shaft is arranged in the housing and is rotationally matched with the housing;

[0005] The output mechanism includes a first rotating member, a second rotating member, a locking portion, a stopping portion, and an elastic member. The elastic member, the first rotating member, and the locking portion are sequentially sleeved on the main shaft, and the elastic member abuts against the first rotating member; the shaft body enables the first rotating member and the locking portion to be axially slidably connected relative to the main shaft, and enables the main shaft to drive the first rotating member and the locking portion to rotate circumferentially; a receiving step is circumferentially arranged on one side of the locking portion close to the first rotating member, and the receiving step is in a ramp transition with the locking portion;

[0006] The second rotating member is sleeved on the locking portion, and a first through hole is arranged on the side wall of the second rotating member, and an inclined surface coupled with the first rotating member is arranged at the tail end thereof;

[0007] The stopping portion includes a body, a limiting groove, and a first stopping member. The body is sleeved on the second rotating member and is fixedly connected with the housing. The limiting groove is arranged on the inner wall of the body. The first stopping member is arranged in the first through hole and stays on the receiving step in the state where the locking portion moves towards the elastic member, and disengages from the receiving step and enters the limiting groove to limit the rotation of the second rotating member in the state where the locking portion moves away from the elastic member.

[0008] Optionally, the main shaft further includes a mounting member. The mounting member is arranged at the end of the shaft body, and a power connection portion is arranged at the end of the mounting member. The power connection portion is used for connecting with the power output end of the tool machine.

[0009] Optionally, an installation part is provided on the inner wall at one end of the housing, and the installation member is rotatably connected to the installation part.

[0010] Optionally, a first installation groove is formed at one end of the first rotating member, the elastic member is arranged in the first installation groove, and one end of the elastic member abuts against the bottom of the first installation groove.

[0011] Optionally, a first reset member is arranged between the locking part and the first rotating member, and the contraction pressure of the first reset member is less than that of the elastic member.

[0012] Optionally, a connecting member is sleeved on the housing, and a clamping part adapted to the tool is arranged on the inner wall of the connecting member.

[0013] Optionally, a clamping part is arranged at the other end of the locking part opposite to the first rotating member, and the clamping part is integrally formed with the locking part and exposes the housing.

[0014] Optionally, the clamping part includes a clamping cavity, a pressing part, a second reset member and a second stopping member. The clamping cavity is integrally formed with the locking part, and a second through hole is formed on the groove wall of the clamping cavity; the pressing part is slidably sleeved on the outer wall of the clamping cavity, a receiving part is arranged on the inner wall of the pressing part, the second reset member is sleeved on the outer wall of the clamping cavity and one end abuts against the pressing part, the diameter of the second stopping member is larger than that of the second through hole, and a part of the second stopping member exposes the orifice of the second through hole in the released state of the second reset member, and the second stopping member is accommodated between the receiving part and the second through hole in the compressed state of the second reset member.

[0015] Optionally, a bearing member is arranged circumferentially along the second rotating member between the second rotating member and the inner wall of the housing, and the bearing member enables the second rotating member to rotate smoothly and / or restricts the axial movement of the second rotating member.

[0016] Optionally, a second installation groove is formed at the end of the locking part opposite to the first rotating member, a first reset member is arranged in the second installation groove, and one end of the first reset member abuts against the bottom of the second installation groove.

[0017] Compared with the prior art, the beneficial effects of the present disclosure are as follows: Through the structure of the output mechanism, the present disclosure realizes the switching between the impact mode and the electric drill mode, which can improve the efficiency during operation; by pressing to drive the movement of the first stopping member to achieve the mode switching of the mechanism, the structural stability under high-intensity industry is satisfied, and the components are not easily damaged, thus extending the service life. Description of the Drawings

[0018] The accompanying drawings herein are incorporated into and constitute a part of this specification, showing embodiments consistent with the present disclosure and, together with the specification, are used to explain the principles of the present disclosure.

[0019] To more clearly illustrate the technical solutions in the embodiments of the present disclosure or in the prior art, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other accompanying drawings can also be obtained based on these drawings without creative efforts.

[0020] Figure 1 Schematic cross-sectional structure diagram of the shutdown in the impact state of the present disclosure;

[0021] Figure 2 One of the schematic cross-sectional structure diagrams of the impact state of the present disclosure

[0022] Figure 3 Another schematic cross-sectional structure diagram of the impact state of the present disclosure;

[0023] Figure 4 Schematic three-dimensional structure diagram of the locking part and the clamping cavity of the present disclosure;

[0024] Figure 5 Schematic cross-sectional structure diagram of the locking part and the clamping cavity of the present disclosure;

[0025] Figure 6 Schematic structure diagram of the main shaft of the present disclosure;

[0026] Figure 7 Schematic structure diagram of the first rotating part of the present disclosure;

[0027] Figure 8 Schematic structure diagram of the second rotating part of the present disclosure;

[0028] Figure 9 Schematic cross-sectional structure diagram of the main shaft, the first rotating part, the second rotating part, the elastic part and the bearing part of the present disclosure;

[0029] Figure 10 Schematic structure diagram of the housing of the present disclosure;

[0030] Figure 11 Schematic structure diagram of the installation part of the present disclosure;

[0031] Figure 12 Schematic structure diagram of the connecting part of the present disclosure;

[0032] Figure 13 Schematic structure diagram of the body and the limiting groove of the stopping part of the present disclosure.

[0033] Wherein, 1 - housing; 15 - connecting member; 2 - main shaft; 21 - shaft body; 22 - mounting member; 221 - power connection portion; 3 - output mechanism; 31 - first rotating member; 313 - first mounting groove; 32 - second rotating member; 321 - first through hole; 323 - bearing member; 33 - locking portion; 331 - receiving step; 332 - second mounting groove; 34 - stopping portion; 340 - body; 341 - limiting groove; 342 - first stopping member; 35 - first reset member; 36 - elastic member; 4 - mounting portion; 5 - clamping portion; 51 - clamping cavity; 511 - second through hole; 52 - pressing portion; 521 - receiving portion; 53 - second reset member; 54 - second stopping member; B - anti-slip hand-held portion. Detailed implementation manners

[0034] In order to more clearly understand the above-mentioned objects, features and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that, without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

[0035] In the following description, many specific details are set forth in order to fully understand the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present disclosure, rather than all of the embodiments.

[0036] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0037] Such as Figures 1 to 13As shown, the present disclosure provides a mechanism for enhancing the hammering function of a handheld tool, which includes a housing 1, a main shaft 2, and an output mechanism 3. The main shaft 2 is disposed within the housing 1 and is rotationally engaged with the housing 1. In a preferred embodiment of the present disclosure, the main shaft 2 includes a shaft body 21 and a mounting member 22. The mounting member 22 is provided at an end of the shaft body 21. An installation portion 4 is provided on the inner wall at one end of the housing 1. The mounting member 22 is rotationally engaged with the installation portion 4 to enable the mounting member 22 to rotate independently within the installation portion 4. The mounting member 22 rotatably supports the internal components of the hammering mechanism; the installation portion 4 serves to fix the axial horizontal position of the main shaft 2 within the housing 1; further, a power connection portion 221 is provided at an end of the mounting member 22 that protrudes from the installation portion 4. Preferably, the power connection portion 221 is a hexagonal prism or other polygonal structures. Among them, the upper end face teeth of the installation portion 4 are engaged with the end face teeth on the handheld tool machine. Preferably, the installation portion 4 and the housing 1 are connected by a plug-in key to prevent relative rotation between the two; the hexagonal shaft of the power connection portion 221 is connected to the hexagonal hole of the handheld tool machine to complete the transmission function of rotation.

[0038] 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. Among them, 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 abuts between the first rotating member 31 and the mounting member 22. Preferably, the elastic member 36 can be a compression spring, an elastic rubber sleeve, or other structures with resilience performance, which can meet the effect of contracting after the first rotating member 31 presses on it and rebounding after releasing pressure. Select an elastic member 36 with a suitable elasticity according to different usage requirements;

[0039] In a preferred embodiment, a first installation groove 313 is opened at one end of the first rotating member 31. The elastic member 36 is disposed within the first installation groove 313 and abuts against the bottom of the first installation groove 313 and the mounting member 22 at both ends respectively; a second installation groove 332 is opened at an end of the locking portion 33 opposite to the first rotating member 31. A first reset member 35 is disposed within the second installation groove 332. Preferably, both ends of the first reset member 35 abut against the bottom of the second installation groove 332 and the first rotating member 31 respectively. The first reset member 35 can be a compression spring. This setting method can better realize the conversion of the hammering function. Optionally, the contraction pressure of the first reset member 35 is less than the contraction pressure of the elastic member 36, that is, the first reset member 35 is more easily compressed than the elastic member 36, so as to ensure 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 reset member 35 is not provided, and the locking portion 33 and the first rotating member 31 are integrally formed, and the hammering function can also be realized. In the preferred embodiment of the present disclosure, the purpose of opening the first installation groove 313 and the second installation groove 332 is to make the movement states of the elastic member 36 and the first reset member 35 more stable.

[0040] In some embodiments of the present disclosure, the first rotating member 31 and the locking portion 33 are axially slidably connected relative to the shaft body 21, and the shaft body 21 drives the first rotating member 31 and the locking portion 33 to rotate circumferentially. Specifically, a groove is provided on the shaft body 21, and protrusions are provided on the inner sides of the first rotating member 31 and the locking portion 33; or a groove is provided on the shaft body 21, and recesses are provided on the inner sides of the first rotating member 31 and the locking portion 33, and spheres are provided in the recesses; or the outer portion of the shaft body 21 and the inner sides of the first rotating member 31 and the locking portion 33 are mating polygons; preferably, the connection method may be that the first rotating member 31 and the locking portion 33 are splined to the shaft body 21;

[0041] In a preferred embodiment of the present disclosure, a receiving step 331 is circumferentially provided on one side of the locking portion 33 close to the first rotating member 31. The receiving step 331 is in smooth transition with the slope of the locking portion 33. This slope 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 meet the smoothness of the switching mode.

[0042] The impact function of the present disclosure is realized through 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 an inclined surface coupled with the first rotating member 31 is provided at its tail end. When the rotational movement of the second rotating member 32 is restricted, under the action of the inclined surfaces where the first rotating member 31 and the second rotating member 32 are coupled, the first rotating member 31 moves toward the elastic member 36. When the inclined surface rotates to the end, the elastic member 36 is suddenly released, and the first rotating member 31 generates an impact movement;

[0043] 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. Preferably, the first stopping member 342 may be a spherical body such as a steel ball to meet the smoothness of the switching mode, or may be a stopper that can move on the slope; the body 340 is sleeved on the second rotating member 32 and is fixedly connected to the housing 1. A limiting groove 341 is provided on the inner wall of the stopping portion 34. The first stopping member 342 is disposed in the first through hole 321. And in the state where the locking portion 33 moves away from the elastic member 36, the first stopping member 342 remains on the receiving step 331. In the state where the locking portion 33 moves toward the elastic member 36, the first stopping member 342 disengages from the receiving step 331 and enters the limiting groove 341 to restrict the circumferential rotation of the second rotating member 32.

[0044] In a preferred embodiment, a connecting member 15 is sleeved and fixedly connected to the outer wall of one end of the housing 1 where the mounting portion 4 is provided. The inner wall of the connecting member 15 is provided with a clamping portion adapted to the tool. Preferably, the clamping portion is a snap fastener. The connecting member 15 is connected to the hand-held power tool. When connecting, the snap fastener is used on the connecting member 15 to achieve quick connection.

[0045] In order to better realize the installation and fixation of the drill bit, the present invention discloses a clamping part 5 is provided at the other end of the locking part 33 opposite to the first rotating part 31. The preferred clamping part 5 includes a clamping cavity 51, a pressing part 52, a second reset part 53 and a second stop part 54. The clamping cavity 51 and the locking part 33 are integrally formed and exposed from the shell 1. A second through hole 511 is provided on the groove wall of the clamping cavity 51; the pressing part 52 is slidably sleeved on the outer wall of the clamping cavity 51, and an accommodating part 521 is provided on the inner wall of the pressing part 52. The second reset part 53 is sleeved on the outer wall of the clamping cavity 51 and abuts against the pressing part 52 and the locking part 33 at both ends. The diameter of the second stop part 54 is larger than the second through hole 511. 11 in diameter, so as to limit the second stop member 54 from entering the clamping cavity 51; when the pressing portion 52 is in the pressing state, the second reset member 53 is compressed by force, so that the accommodating portion 521 corresponds to the position of the second through hole 511, so that the second stop member 54 has a certain degree of mobility between the accommodating portion 521 and the second through hole 511, and the second stop member 54 can be pressed into the accommodating portion 521 by the inserted drill bit; in the non-pressing state, the accommodating portion 521 and the second through hole 511 are staggered, and the position of the second stop member 54 is fixed due to the reduction in space, and part of the second stop member 54 is exposed from the opening of the second through hole 511, and the exposed part locks the inserted drill bit to achieve the installation and fixation of the drill bit.

[0046] In some embodiments of the present disclosure, a bearing member 323 is arranged between the second rotating member 32 and the inner wall of the shell 1 along the circumference of the second rotating member 32, and the bearing member 323 limits the axial movement of the second rotating member 32. The optional bearing member 323 is a steel ball arranged around the second rotating member 32. Mutually matching sliding grooves are provided on the inner wall of the shell 1 and the outer wall of the second rotating member 32, and the steel balls are arranged in the two sliding grooves. The bearing member 323 can limit the axial movement of the second rotating member 32, or it can limit the unidirectional movement of the second rotating member 32 in the direction of the clamping portion 5 or the mounting portion 4 to adapt to the requirements of various implementation methods. The most important function is to enable the second rotating member 32 to rotate smoothly in the shell 1 in a non-hammering state.

[0047] In a preferred embodiment of the present disclosure, an anti-skid pad A is provided on the pressing section of the pressing portion 52 to facilitate installation, and an anti-skid grip portion B is provided on the outer wall of the shell 1 to better support the drill bit in an impact state.

[0048] The specific working conditions are as follows:

[0049] In the non-impact state of the present disclosure, the locking portion 33 moves away from the first rotating member 31 under the action of the first reset member 35 (i.e., the locking portion 33 moves away from the elastic member 36). At this time, the receiving step 331 corresponds to the through hole 321, and the first stopping member 342 falls 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. 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 there is no relative rotation between the first rotating member 31 and the second rotating member 32, the machine tool does not generate an impact function.

[0050] When the machine tool is equipped with a drill bit and starts to perform a drilling operation, due to the manual pressing on the target object, the first reset member 35 is compressed, and the locking portion 33 moves towards the first rotating member 31 (i.e., the locking portion 33 moves towards the elastic member 36). At this time, the first stopping member 342 is pushed into the limiting groove 341 of the stopping portion 34 under the action of the ramp transition surface of the receiving step 331 of the locking portion 33. Since the body 340 is fixed to the housing and does not rotate, and a part of the first stopping member 342 is in the through hole 321 of the second rotating member 32 and the other part is pushed into the limiting groove 341 of the stopping portion 34, the second rotating member 32 stops rotating under the action of the first stopping member 342. The first rotating member 31 continues to rotate under the drive of the main shaft 2. In this way, a relative rotation is generated between the first rotating member 31 and the second rotating member 32. Under the action of the inclined surfaces coupled between the first rotating member and the second rotating member, the first rotating member moves towards the elastic member 36. At this time, the elastic member 36 is compressed. When the inclined surface rotates to the end, the elastic member 36 suddenly releases, and the first rotating member 31 generates an impact movement, hitting the locking portion 33. The locking portion 33 transmits the impact energy to the drill bit to realize the function of impact drilling.

[0051] The above are only specific embodiments of the present disclosure, enabling those skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to these embodiments described herein, but rather will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mechanism for increasing the hammering function of a hand tool, characterized in that, it includes a housing (1), a main shaft (2) and an output mechanism (3), wherein, the main shaft (2) includes a shaft body (21), the main shaft (2) is arranged in the housing (1) and is rotationally matched with the housing (1); the output mechanism (3) includes a first rotating member (31), a second rotating member (32), a locking portion (33), a stopping portion (34) and an elastic member (36), the elastic member (36), the first rotating member (31) and the locking portion (33) are sequentially sleeved on the main shaft (2), and the elastic member (36) abuts against the first rotating member (31); the shaft body (21) enables the first rotating member (31) and the locking portion (33) to be axially slidably connected relative to the main shaft (2), and enables the main shaft (2) to drive the first rotating member (31) and the locking portion (33) to rotate circumferentially; a receiving step (331) is circumferentially arranged on one side of the locking portion (33) close to the first rotating member (31), and the receiving step (331) is in a sloping transition with the locking portion (33); the second rotating member (32) is sleeved on the locking portion (33), a first through hole (321) is arranged on the side wall of the second rotating member (32), and an inclined surface coupled with the first rotating member (31) is arranged at its tail end; the stopping portion (34) includes a body (340), a limiting groove (341) and a first stopping member (342), the body (340) is sleeved on the second rotating member (32) and is fixedly connected with the housing (1), the limiting groove (341) is arranged on the inner wall of the body (340), the first stopping member (342) is arranged in the first through hole (321), and stays on the receiving step (331) in the state where the locking portion (33) moves towards the elastic member (36), and disengages from the receiving step (331) and enters the limiting groove (341) to limit the rotation of the second rotating member (32) in the state where the locking portion (33) moves away from the elastic member (36).

2. The mechanism for increasing the hammering function of a hand tool according to claim 1, characterized in that, the main shaft (2) further includes a mounting member (22), the mounting member (22) is arranged at the end of the shaft body (21), and a power connection portion (221) is arranged at the end of the mounting member (22), and the power connection portion (221) is used for connecting with the power output end of a tool machine.

3. The mechanism for increasing the hammering function of a hand tool according to claim 2, characterized in that, a mounting portion (4) is arranged on the inner wall of one end of the housing (1), and the mounting member (22) is rotationally connected with the mounting portion (4).

4. The mechanism for increasing the hammering function of a hand tool according to claim 1, characterized in that, One end of the first rotating member (31) is provided with a first installation groove (313), the elastic member (36) is arranged in the first installation groove (313), and one end of the elastic member (36) abuts against the bottom of the first installation groove (313).

5. The mechanism for increasing the hammering function of a hand tool according to claim 1, wherein, a first reset member (35) is arranged between the locking portion (33) and the first rotating member (31), and the contraction pressure of the first reset member (35) is less than that of the elastic member (36).

6. The mechanism for increasing the hammering function of a hand tool according to claim 1, characterized in that a connecting member (15) is sleeved and connected to the housing (1), and a clamping portion adapted to the tool is arranged on the inner wall of the connecting member (15).

7. The mechanism for increasing the hammering function of a hand tool according to claim 1, wherein, a clamping portion (5) is arranged at the other end of the locking portion (33) opposite to the first rotating member (31), and the clamping portion (5) is integrally formed with the locking portion (33) and exposed outside the housing (1).

8. The mechanism for increasing the hammering function of a hand tool according to claim 7, wherein, the clamping portion (5) includes a clamping cavity (51), a pressing portion (52), a second reset member (53) and a second stopping member (54). The clamping cavity (51) is integrally formed with the locking portion (33), and a second through hole (511) is arranged on the groove wall of the clamping cavity (51); the pressing portion (52) is slidably sleeved on the outer wall of the clamping cavity (51), a receiving portion (521) is arranged on the inner wall of the pressing portion (52), the second reset member (53) is sleeved on the outer wall of the clamping cavity (51) and one end abuts against the pressing portion (52), the diameter of the second stopping member (54) is larger than the diameter of the second through hole (511), and a part of the second stopping member (54) exposes the orifice of the second through hole (511) in the released state of the second reset member (53), and the second stopping member (54) is received between the receiving portion (521) and the second through hole (511) in the compressed state of the second reset member (53).

9. The mechanism for increasing the hammering function of a hand tool according to claim 1, wherein, a bearing member (323) is arranged circumferentially along the second rotating member (32) between the second rotating member (32) and the inner wall of the housing (1), and the bearing member (323) enables the second rotating member (32) to rotate smoothly and / or restricts the axial movement of the second rotating member (32).

10. The mechanism for increasing the hammering function of a hand tool according to claim 1, wherein, a second installation groove (332) is formed at the end of the locking portion (33) opposite to the first rotating member (31), a first reset member (35) is arranged in the second installation groove (332), and one end of the first reset member (35) abuts against the bottom of the second installation groove (332).

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