Impact Tools

Abstract

The present invention discloses an impact tool, comprising a frame, a motor housed in the frame, a transmission mechanism, an output shaft and an adjusting cup installed on the outer side of the frame, the motor drives the transmission mechanism to rotate, and drives the output shaft to perform a rotational output motion; the impact tool is provided with an impact mechanism and a rotation-stopping part, and the impact mechanism has a movable ratchet fixed to the output shaft, a hammer axially sliding on the output shaft and an elastic member sleeved on the output shaft, the movable ratchet and the hammer have mutually coupled inclined surfaces, in an impact mode, the rotation-stopping part abuts against the hammer, so that the hammer can only move axially but not rotationally, and the hammer moves on the inclined surface, and the impact function is realized under the release of the capacity of the elastic member, when only the electric drilling mode is required, the rotation-stopping pin is disengaged from the hammer, and the hammer and the movable ratchet rotate together, thereby realizing an impact mode with higher impact efficiency and improving work efficiency.

Description

Technical Field

[0001] The invention relates to an electric tool, in particular to an impact tool which can work in both an impact mode and an electric drill mode. Background Art

[0002] At present, the electric drills on the market provide at least two modes for easy use, for example, the two modes are the normal electric drill mode and the impact mode with impact. Please refer to the impact electric drill disclosed in the Chinese utility model patent No. CN206216621U published on June 6, 2017. In the screw gear position, the locking groove on the lower end face of the adjustment ring contacts the limiting convex part of the jump gear gasket, and the locking platform on the upper end face of the adjustment ring contacts the toggle rod of the impact conversion gasket, that is, the jump gear gasket is not locked at this time, and the impact conversion gasket is locked. The jump gear gasket moves up and down, so that the gear box can jump gear but cannot impact; when the torque cover rotates counterclockwise, the upper boss on the torque cover drives the lower boss on the adjustment ring to rotate, so that the adjustment ring rotates, and at this time the locking platform on the lower end face of the adjustment ring When the gear shift pad is in the locked state, the impact conversion pad is in the locked state, and the impact conversion pad is in the locked state.

[0003] However, the impact force of the above-mentioned mode of achieving impact through the locking groove is very limited. Since the movable space before and after the locking groove is limited, the impact force is insufficient and the working efficiency is low, so it cannot meet the impact work in a high environment.

[0004] In view of this, it is indeed necessary to provide an improved impact tool to overcome the defects of the prior art. Summary of the invention

[0005] In view of the deficiencies of the prior art, an object of the present invention is to provide an impact tool with high impact efficiency and at least dual purpose.

[0006] The technical solution adopted by the present invention to solve the problems of the prior art is: an impact tool, including a frame, a motor housed in the frame, a transmission mechanism, an output shaft and an adjusting cup installed on the outside of the frame, the motor drives the transmission mechanism to rotate, and drives the output shaft to perform a rotating output motion; the transmission mechanism has an impact mechanism and a stopper sleeved on the output shaft, the impact mechanism has a movable ratchet fixed to the output shaft, a hammer axially sliding on the output shaft and an elastic member sleeved on the output shaft, the movable ratchet and the hammer have mutually coupled inclined surfaces, the front end of the hammer is provided with a striking part and a guide groove located on the outside, the movable ratchet has an impacted part matched with the striking part, one end of the elastic member abuts against the tail end of the hammer, and the other end abuts against the frame; the stopper has a A stop pin and a rebound support member that pushes the stop pin to move, the adjustment cup has a cam block that abuts against one end of the stop pin; when the impact tool is in impact mode, the adjustment cup is rotated to make the cam block squeeze the stop pin to move, and the other end of the stop pin enters the guide groove of the hammer, the output shaft drives the moving ratchet to rotate and pushes the hammer to move axially along the inclined surface, after the inclined surfaces reach each other's apex and separate, the elastic member squeezes the hammer to accelerate the movement, and the striking part of the hammer strikes the impacted part of the moving ratchet; when the impact tool is only in drilling mode, the adjustment cup is rotated, the cam block is separated from the stop pin, and the rebound support member pushes the stop pin to move, when the other end of the stop pin leaves the guide groove of the hammer, the hammer and the moving ratchet rotate together.

[0007] A further improvement is as follows: the transmission mechanism has a gear box, one end of which is meshed with the motor, and the other end of which is meshed with the output shaft.

[0008] A further improvement scheme includes: the gear box has a first-stage transmission tooth, a second-stage transmission tooth and a third-stage transmission tooth that mesh with each other, the first-stage transmission tooth meshes with the motor, and the third-stage transmission tooth meshes with the output shaft.

[0009] Further improvement schemes include: the impact tool has a torsion adjustment spring and a transmission pin passing through the frame, one end of the torsion adjustment spring abuts against the adjustment cup, and the other end abuts against the transmission pin, and the other end of the transmission pin abuts against the inner gear ring of the third-stage transmission tooth. The rotation of the adjustment cup pushes the adjustment spring to move, and squeezes the transmission pin to move on the frame, pushing the transmission pin and the inner gear ring of the third-stage transmission tooth to achieve pre-tightening meshing action.

[0010] A further improvement scheme includes: the regulating cup has a rotating cup located on the outside and an inner ring engaged with the rotating cup, and the cam block is located on the inner ring.

[0011] A further improvement scheme includes: the adjusting cup and the frame are meshed with each other through threads.

[0012] A further improvement scheme includes: the impact tool has a chuck mounted on the end of the output shaft, and the output shaft drives the chuck to rotate.

[0013] A further improvement scheme includes: the frame has a rear seat and a front frame installed at the front end of the rear seat, the motor is installed on the rear seat, the gear box is located between the front frame and the rear seat, and the adjustment cup is installed on the front frame.

[0014] Further improvement schemes include: the impact tool has a speed regulating mechanism installed on the frame, the speed regulating mechanism has a speed regulating dial button and a steel wire that slides back and forth, the steel wire is fixed on the speed regulating dial button, and both ends are clamped on the inner gear ring of the second-stage transmission tooth to push the inner gear ring of the second-stage transmission tooth to move back and forth.

[0015] A further improvement scheme is as follows: the impact tool is a cordless lithium battery tool. Compared with the prior art, the present invention has the following beneficial effects: by providing the impact tool with an impact mechanism and a stopper, and the impact mechanism has a movable ratchet fixed to the output shaft, a hammer axially sliding on the output shaft, and an elastic member sleeved on the output shaft, the movable ratchet and the hammer have mutually coupled inclined surfaces, in the impact mode, the stopper abuts against the hammer, so that the hammer can only move axially but not rotate, and the hammer moves on the inclined surface, and the impact function is realized under the release of the capacity of the elastic member, when only the electric drill mode is required, the stopper pin is separated from the hammer, and the hammer and the movable ratchet rotate together, realizing an impact mode with higher impact efficiency and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings:

[0017] Figure 1 is a three-dimensional schematic diagram of the impact tool of the present invention;

[0018] Figure 2 yes Figure 1 Cross-sectional view of the impact tool along the AA direction;

[0019] Figure 3 yes Figure 1 A schematic diagram of a partial cutaway of a middle impact tool;

[0020] Figure 4 yes Figure 1 A three-dimensional schematic diagram of the middle inner ring and the stop pin;

[0021] Figure 5 It is an exploded schematic diagram showing the impact part;

[0022] Figure 6 yes Figure 5 A schematic diagram of a part of the structure from another angle;

[0023] Figure 7 yes Figure 1 A cross-sectional view along direction BB is shown;

[0024] Figure 8 yes Figure 7 Schematic diagram after the suspension pin is disengaged. DETAILED DESCRIPTION

[0025] Specific examples of the implementation methods of the present invention will be described in detail below, wherein the words for directions such as front, back, left, right, up, and down involved in the present application are described based on the schematic diagrams of the embodiments placed in the figures to facilitate understanding, but do not represent structural changes of the product in other usage environments, and the embodiments described in the following exemplary implementation methods do not represent all embodiments consistent with this patent application.

[0026] See also Figure 1 and Figure 2 As shown, an embodiment of the present invention discloses an impact tool. Of course, what is shown in the figure is an electric drill, and in particular, it relates to a multifunctional impact electric drill that can adjust the speed and impact. The impact tool includes a frame 1, a motor 2 accommodated in the frame 1, a transmission mechanism 3, an output shaft 4, and an adjustment cup 5 installed on the outside of the frame. The motor 2 drives the transmission mechanism 3 to rotate and drives the output shaft 4 to perform a rotational output motion. In this embodiment, the impact tool shows a cordless lithium-ion impact tool, and a battery pack 6 is installed on the lower side of the frame 1; the adjustment cup 5 and the frame 1 are engaged with each other through threads. The impact tool has a chuck 7 installed at the end of the output shaft 4, and the output shaft 4 drives the chuck 7 to rotate. The frame 1 has a handle 12 and a switch 13 installed on the handle.

[0027] Please refer to Figure 2 As shown, the frame 1 comprises a rear seat 10 and a front frame 11 installed at the front end of the rear seat, the motor 2 is installed on the rear seat 10 , and the adjustment cup 5 is installed on the front frame 11 .

[0028] The transmission mechanism 3 comprises an impact mechanism 31, a stopper 32 and a gear box 33 sleeved on the output shaft 4. One end of the gear box 3 is meshed with the motor 2, and the other end is meshed with the output shaft 4. The gear box 33 comprises a first-stage transmission tooth 330, a second-stage transmission tooth 331 and a third-stage transmission tooth 332 meshed with each other. The first-stage transmission tooth 330 is meshed with the motor 2, and the third-stage transmission tooth 332 is meshed with the output shaft 4. In this embodiment, the gear box 33 of the transmission mechanism 3 is located between the front frame 11 and the rear seat 10.

[0029] The impact tool has a speed regulating mechanism 8 mounted on a frame, the speed regulating mechanism 8 has a speed regulating dial 80 and a steel wire 81 that slides forward and backward. The steel wire 81 is fixed to the speed regulating dial 80, and both ends of the steel wire 81 are clamped on the inner gear ring 333 of the second-stage transmission gear 331 to push the inner gear ring 333 of the second-stage transmission gear 331 to move forward and backward.

[0030] See also Figures 3 to 8 As shown, the impact mechanism 31 has a movable ratchet 310 fixed to the output shaft 4, a hammer 311 axially sliding on the output shaft 4 and an elastic member 312 sleeved on the output shaft 4, the movable ratchet 310 and the hammer 311 have mutually coupled inclined surfaces 313, the front end of the hammer 311 is provided with a striking part 314 and a guide groove 315 located on the outside, the movable ratchet 310 has an impacted part 316 matched with the striking part 314, one end of the elastic member 312 abuts against the tail end of the hammer 311, and the other end abuts against the frame 1. In this embodiment, the other end of the elastic member 312 abuts against the bearing 40 of the output shaft 4.

[0031] The impact tool has a torsion adjustment spring 50 and a transmission pin 51 passing through the frame. One end of the torsion adjustment spring 50 abuts against the adjustment cup 5, and the other end abuts against the transmission pin 51. The other end of the transmission pin 51 abuts against the inner gear ring 334 of the third-stage transmission tooth 332. The rotation of the adjustment cup 5 pushes the adjustment spring 50 to move, and squeezes the transmission pin 51 to move on the frame 1, pushing the transmission pin 51 and the inner gear ring 334 of the third-stage transmission tooth 332 to achieve pre-tightening meshing action to provide different torque outputs.

[0032] The above-mentioned anti-rotation part 32 has a anti-rotation pin 320 passing through the frame and a rebound support member 321 that pushes the anti-rotation pin 320 to move, and the adjustment cup 5 has a cam block 52 that abuts against one end of the anti-rotation pin 320; in this embodiment, the adjustment cup 5 has a rotating cup 53 located on the outside and an inner ring 54 engaged with the rotating cup 53, and the above-mentioned cam block 52 is located on the inner ring 54. Since the inner ring can be made into a metal structure, the strength of the cam block 52 is increased. In addition, the rotating cup 53 can be made into a plastic part to reduce the weight of the impact tool.

[0033] In the impact tool of this embodiment, the impact tool can have multiple working modes, such as an impact working mode and a common electric drill mode. When the impact tool is in the impact mode, the adjustment cup 5 is rotated to squeeze the stop pin 320 to move, and the other end of the stop pin 320 enters the guide groove 315 of the hammer 311, and the output shaft 4 drives the ratchet 310 to rotate and push the hammer 311 to move along the inclined surface axis 313. After the inclined surfaces 313 reach the vertex A and separate, the elastic member 312 squeezes the hammer to accelerate the movement, and the striking part 314 of the hammer 311 is pressed against the hammer 311. The impacted portion 316 of the movable ratchet 310 performs a striking action; when the impact tool is in the electric drill mode, it is necessary to rotate the adjusting cup 5 again, the cam block 52 is separated from the stop pin 320, and the rebound support 321 pushes the stop pin 320 to move, when the other end of the stop pin 320 leaves the guide groove 315 of the hammer 311, at this time, the hammer 311 is in a free state, and the hammer 311 and the movable ratchet 310 are meshed with each other at an inclined surface and will rotate together.

[0034] The present invention provides an impact tool with an impact mechanism 31 and a stopper 32, and the impact mechanism has a movable ratchet 310 fixed to the output shaft 4, a hammer 311 axially sliding on the output shaft 4, and an elastic member 312 sleeved on the output shaft. The movable ratchet 310 and the hammer 311 have mutually coupled inclined surfaces 313. In the impact mode, the stopper abuts against the hammer, so that the hammer can only move axially but not rotate, and the hammer 311 moves on the inclined surface 313. When the capacity of the elastic member is released, the impact function is realized. When only the electric drill mode is required, the stopper is disengaged from the hammer, and the hammer and the movable ratchet rotate together, realizing an impact mode with higher impact efficiency and improving work efficiency. The movable ratchet 310 rotates together with the output shaft 4.

[0035] The present invention is not limited to the above specific embodiments. A person skilled in the art can easily understand that there are many alternatives for the impact tool of the present invention without departing from the principle and scope of the present invention. The protection scope of the present invention shall be subject to the content of the claims.

Claims

1. An impact tool, comprising a frame, a motor housed in the frame, a transmission mechanism, an output shaft and an adjustment cup mounted on the outside of the frame, wherein the motor drives the transmission mechanism to rotate and drives the output shaft to perform a rotational output motion; characterized in that: The transmission mechanism comprises an impact mechanism and a stopper sleeved on the output shaft, the impact mechanism comprises a movable ratchet fixed to the output shaft, a hammer axially sliding on the output shaft and an elastic member sleeved on the output shaft, the movable ratchet and the hammer have mutually coupled inclined surfaces, a striking portion and a guide groove located on the outside are provided at the front end of the hammer, the movable ratchet has an impacted portion matched with the striking portion, one end of the elastic member abuts against the tail end of the hammer, and the other end abuts against the frame; the stopper comprises a stopper pin passing through the frame and a rebound support member for pushing the stopper pin to move, and the adjustment cup comprises a cam block abutting against one end of the stopper pin; when the impact tool is used for impact In the striking mode, the adjusting cup is rotated to squeeze the cam block to move the stop pin, and the other end of the stop pin enters the guide slot of the hammer, the output shaft drives the moving ratchet to rotate and pushes the hammer to move axially along the inclined surface, and after the inclined surfaces reach each other's apex and separate, the elastic member squeezes the hammer to accelerate the movement, and the striking part of the hammer strikes the impacted part of the moving ratchet; when the impact tool is in the electric drill mode, the adjusting cup is rotated, the cam block is separated from the stop pin, and the rebound support member pushes the stop pin to move, and when the other end of the stop pin leaves the guide slot of the hammer, the hammer and the moving ratchet rotate together.

2. The impact tool according to claim 1, characterized in that: The transmission mechanism comprises a gear box, one end of which is meshed with the motor, and the other end of which is meshed with the output shaft.

3. The impact tool according to claim 2, characterized in that: The gear box comprises a first-stage transmission tooth, a second-stage transmission tooth and a third-stage transmission tooth which are meshed with each other. The first-stage transmission tooth is meshed with the motor, and the third-stage transmission tooth is meshed with the output shaft.

4. The impact tool according to claim 3, characterized in that: The impact tool comprises a torsion adjustment spring and a transmission pin passing through the frame, one end of the torsion adjustment spring abuts against the adjustment cup, and the other end abuts against the transmission pin, and the other end of the transmission pin abuts against the inner gear ring of the third-stage transmission tooth. The rotation of the adjustment cup pushes the adjustment spring to move, and squeezes the transmission pin to move on the frame, pushing the transmission pin and the inner gear ring of the third-stage transmission tooth to achieve pre-tightening meshing action.

5. The impact tool according to claim 1, characterized in that: The regulating cup comprises a rotating cup located at the outside and an inner ring engaged with the rotating cup, and the cam block is located on the inner ring.

6. The impact tool according to claim 5, characterized in that: The adjusting cup and the frame are meshed with each other through threads.

7. The impact tool according to claim 1, characterized in that: The impact tool has a chuck mounted on the end of an output shaft, and the output shaft drives the chuck to rotate.

8. The impact tool according to claim 4, characterized in that: The frame comprises a rear seat and a front frame installed at the front end of the rear seat, the motor is installed on the rear seat, the gear box is located between the front frame and the rear seat, and the regulating cup is installed on the front frame.

9. The impact tool according to claim 3, characterized in that: The impact tool has a speed regulating mechanism installed on a frame, the speed regulating mechanism has a speed regulating dial button and a steel wire that slides forward and backward. The steel wire is fixed on the speed regulating dial button, and both ends of the steel wire are clamped on the inner gear ring of the second-stage transmission gear to push the inner gear ring of the second-stage transmission gear to move forward and backward.

10. The impact tool according to claim 1, characterized in that: The impact tool is a cordless lithium-powered tool.

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