CN201267988Y - Impact conversion structure of electric tool - Google Patents

Abstract

An impact conversion structure of an electric tool includes a torque adjustment mechanism, a shifting mechanism connected to the torque adjustment mechanism, and an impact mechanism located in the shifting mechanism. The torque adjustment mechanism is used to set a single first torque member on the outside to cooperate with a second torque member located inside. The stroke can be switched by switching the single first torque member, thereby solving the defects of the prior art.

Description

Impact conversion structure of electric tools

technical field

The utility model relates to an impact conversion technology, in particular to an impact conversion mechanism of an electric tool.

Background technique

Electric tools are widely used in various industries such as construction, machinery, electric power, petrochemical, metallurgy, transportation, agriculture, etc. At the same time, because DIY (Do It Yourself) has become a trend, electric tools have become products that have entered the family, and are also There are related patent technologies, such as US Patent No. 5,277,127, US Patent No. 5,738,469, US Patent No. 6,533,093, and Taiwan Patent Certificate No. M2711281 utility model patent, etc.

Taking the power tools of electric drills as an example, they can be roughly divided into types such as hand drills, impact drills, and hammer drills, among which impact drills should be the most frequently used power tools. As the name implies, an impact drill is an electric tool that provides a hammering function while performing electric drilling operations. Impact drills are very similar to ordinary electric drills in appearance, and both have the design of changing front accessories. Users can attach screwdrivers, drill bits, or grinding tools according to different needs.

Generally speaking, the impact drill generally has a lock screw file, an electric drill file, and an impact file. When using the screw gear, the control gear must be adjusted to the screw gear; at this time, the impact drill will determine when to skip the gear according to the torque setting of the screw gear, and when the gear is skipped, the rotary motor of the impact drill continues to rotate, but the screwdriver remains stationary , the impact drill cannot output the maximum torque. When the electric drill gear is used, the rotary motor and the front-end drill bit always maintain the same action, output the maximum torque, and maintain no gear jump. When using the impact gear, in addition to maintaining the original electric drill gear function, the impact mechanism will be activated at the same time to provide a hammer-like impact effect, which can more efficiently perform drilling operations on cement walls or other hard objects.

In order to operate and adjust according to different needs, an impact conversion structure is usually designed between the rotary motor and the front-end accessories to meet the needs of mechanical operation and adjustment, and provide the user with a control interface for setting the impact drill, Figure 1a to Figure 1 3 is the existing impact conversion structure.

Fig. 1 a shows a kind of impact conversion structure of a single cup designed by someone, the output spindle 20 is arranged to pass through the torsion cup 22, and one end is exposed outside the torsion cup 22 for the installation of front-end fittings (not shown), while the other A motor (not shown) can be connected to one end. The torque cup 22 can be used to adjust the function of the impact drill. It has a gear marking area 222 for marking the screw gear and torque setting. For example, the larger the number, the stronger the torque. The marking part 2224 marks the position of the shock gear. When wanting to start the electric drill gear or the impact gear, the torque cup 22 must be rotated clockwise (for example) to turn from the lowest torque screw gear all the way to the electric drill gear or the impact gear.

As shown in Figure 1b, this existing impact conversion structure is formed by transmitting the rotational power to the output main shaft 20 through the planetary gear train 24 composed of the transmission tooth plate 242, the planetary gear 244, the planetary gear seat 246 and the internal gear 248. Yes, in addition to using the reduction ratio to increase the torque, the motor can also be kept rotating while the output spindle 20 remains stationary, that is, the so-called screw gear jump function can be realized. This prior art is realized by rotating the torsion cup 22, and the height of the adjusting screw 26 relative to the washer 28 can be positioned by the screw thread inside the torsion cup 22, so that the height compresses the compression spring 23, and then the compression spring 23 is compressed by the washer 28. The force is transmitted to the steel ball 21 to compress the internal gear 248, and the internal gear 248 cannot rotate due to the compression force, so as to achieve the purpose of torque control (or called shift control). In addition, there is a space between the adjustment screw 26 and the washer 28 that can accommodate the steel ball 21 to lift up. When the output spindle 20 is resisted (for example, screw locking operation), the internal gear 248 will start to rotate and pass through the steel ball 21. The contacting slope lifts up the steel ball 21, so that the internal gear 248 starts to rotate freely while the output main shaft 20 remains stationary, so that gear jumping can be realized. For the control of the electric drill gear or the impact gear without jumping gears, it can also be realized by changing the height of the adjustment screw 26 relative to the gasket 28 .

But this kind of prior art can't be reversely converted directly from the lowest torque screw gear to the electric drill gear or the impact gear; Similarly, after using the electric drill gear or the impact gear, if you want to switch to the screw gear, you must switch from the electric drill gear or the impact gear to the screw gear. Turn back to the screw gear in the reverse direction, and you cannot directly switch back to the screw gear from the electric drill gear or the impact gear in the forward direction. It can be seen from this that if the user wants to alternately use the screw gear, the electric drill gear, or the impact gear frequently, he must rotate the torque cup nearly 360 degrees each time, which is very inconvenient.

At the same time, this prior art simply utilizes the gear jump control method of rotating the torque cup 22 to press the adjustment screw 26, so it is difficult to clearly define the switching position between the highest torque screw gear and the electric drill gear, and the highest torque screw gear next to the high torque output electric drill gear is continued. , often provide the maximum torque beyond the general lock screw required. Moreover, when using this prior art, it is impossible to provide obvious stepped torque changes between the screw gear and the electric drill gear. In addition, in order to reduce the rising space of the steel ball 21, the user must rotate the torque cup 22 to push the adjustment screw. 26 to the extreme end, now the compression spring 23 has accumulated a very large elastic force, and it becomes very difficult to turn the torsion cup 22.

Fig. 2 shows a double-cup impact conversion structure, the impact conversion structure has two separately controlled torque cups 42 and 44, the upper torque cup 42 is mainly for the conversion between gears, the lower torque cup 44 is for the screw gear torque adjustment. FIG. 3 is also a double-cup impact conversion structure, which uses the same torque cup 22 as the single-cup impact conversion structure to control the torque of the screw gear, and the sliding push button 62 can directly convert different gears.

However, in the above two prior art, both the two control interfaces need to be adjusted simultaneously in the use of the screw gear, one for setting the screw gear and the other for setting the torque output, which is time-consuming and labor-intensive. At the same time, the parts required for the impact conversion structure of the double cups are complex, bulky and heavy, which cannot meet the lightness requirements of the electric tool, and the cost is relatively increased.

Furthermore, in terms of safety, regardless of the impact conversion structure of the aforementioned single cup or double cup, it can be directly switched from the screw gear to the electric drill gear, and there is no safety switch design. The impact gear will cause the loss of the jump gear function and output the maximum torque, or even activate the impact function, thereby causing damage to the screw body or the construction object.

In addition, the aforementioned existing technologies all use the torque cup to press the internal adjustment spring, thereby forcing the transmission mechanism to fail to jump gears. After long-term use, due to the elastic fatigue of the spring itself and the mechanical wear that may occur in the internal mechanical control mechanism, it will lead to failure. Execute the function of not skipping files accurately. Therefore, when using the aforementioned prior art, it is often found that even if the torque cup is in the position of the electric drill or the impact position, the gear jump still occurs. The solution is to replace the parts, so not only the durability of the product is greatly affected, but also the Aggravate the user's use cost burden.

It can be seen from the above that the switching stroke of the prior art is complicated, there is no safety protection switch, the locking of the jump gear is not accurate, there is no obvious stepwise torque change, and the switching switch is not easy. Therefore, how to propose a shock conversion technology to avoid the existing technology The various deficiencies in it are actually technical problems that are urgently desired to be solved at present.

Contents of the invention

In view of the above-mentioned shortcomings of the prior art, one of the purposes of the present utility model is to provide an impact conversion structure of an electric tool, so as to facilitate gear shifting.

Another object of the present utility model is to provide an impact switching structure of an electric tool, so as to quickly switch gears.

Another object of the present utility model is to provide an impact conversion structure of an electric tool, thereby providing safety protection.

Another object of the present invention is to provide an impact conversion structure of an electric tool, thereby simplifying the structure, reducing the weight, and further providing cost-effectiveness.

In order to achieve the above and other purposes, the utility model provides an impact conversion structure of an electric tool, the electric tool includes a gear box front shell and an output spindle passing through the gear box front shell, and the gear box front shell has a cylinder part and a flange part formed at one end of the cylindrical part, the impact conversion structure includes: a torque adjustment mechanism, which covers the front case of the gearbox, including a first torsion member rotatably coupled to the output spindle, A locating piece arranged in the first torsion piece, a fixing piece arranged on one side of the locating piece, and a second torsion piece set on the side of the fixing piece away from the locating piece; a jump gear mechanism, which connects the The torque adjustment mechanism includes an adjustment piece arranged on the flange portion, a plurality of jumping pieces pierced through the adjustment piece, and a plurality of first elastic pieces respectively arranged on each of the jumping pieces; and an impact mechanism, which It is passed on the output spindle for the torque adjustment mechanism to link the impact mechanism, including first and second impact conversion parts located in the flange part, and a second elastic spring disposed between the first and second impact conversion parts. part, and the first and second braking parts arranged on the side of the second impact conversion part away from the first impact conversion part.

In the impact conversion structure of the aforementioned electric tool, the first torsion member is a torsion cup and has a single control interface. The first torsion member is provided with an internal flange on one side, a convex portion on the inner wall, and a The groove on the other side away from the inner flange. The positioning part is an indicating positioning plate, the fixing part is a fixed ring, and is arranged between the positioning part and the second torsion part, and the second torsion part is a torsion ring.

The adjusting part can be an adjusting screw that is passed through the flange part, and the ring is provided with a plurality of openings for each jumping part to pass through, and an internal thread on the inner wall corresponding to the external thread of the flange part. , and a convex portion provided on the outer periphery. Each of these jumping gear parts can be a long jumping gear pin. Each of the first elastic parts is a compression spring sheathed on each of the jumping parts, and the length of each of the first elastic parts is shorter than that of each of the jumping parts.

The first and second impact conversion parts can be, for example, an upper impact conversion disc and a lower impact conversion disc, respectively, the second elastic member is, for example, a torsion spring, and the first and second braking parts can be mutually matched. ratchet.

Compared with the prior art, the utility model is equipped with a second torsion member inside, which can quickly switch from the first gear to the electric drill gear and the impact gear, and only the outer first torque cup rotates when turning from the first gear. The internal second torsion member does not move, and the output torque gradually increases from the first gear, so it can solve the existing single-cup impact conversion structure. From the first gear, it takes many gears to reach the final electric drill gear and impact gear. The inconvenience caused by the use, and the output torque change between two adjacent gears is not obvious, so the output torque cannot be increased sharply, and it solves the shortcomings of the existing double-cup impact conversion structure. Inconvenient operation due to the need to output torque, and the use of complex structure, large number of parts, high cost, high price, large volume, heavy weight, and inconvenient use caused by two torque cups controlling different functions separately.

At the same time, the first torsion member designed by the utility model must be lifted or pressed down before it can be transferred to the electric drill gear and the impact gear, so as to realize a sharp increase in the output torque, which can provide a relatively safe protection mechanism. In addition, compared with the prior art, the utility model has the advantages of simple structure, convenient use, superior performance, good practicability and cost-effectiveness, and actually overcomes the disadvantages of the prior art.

Description of drawings

1a and 1b are impact conversion structures of conventional electric tools, wherein FIG. 1a shows a schematic appearance of a single-cup impact conversion structure, and FIG. 1b is a cross-sectional view of FIG. 1a.

FIG. 2 is another conventional impact conversion structure of an electric tool, in which a double-cup impact conversion structure is shown.

FIG. 3 is yet another conventional impact conversion structure of an electric tool, in which another double-cup impact conversion structure is shown.

FIG. 4 is an exploded schematic diagram of an embodiment of the impact conversion structure of the electric tool of the present invention.

FIG. 5 is an assembly diagram of FIG. 4 .

6a and 6b are schematic diagrams of the first torsion member in the embodiment of the present invention.

Fig. 7 is a schematic diagram of a positioning member in an embodiment of the present invention.

Fig. 8a is a cross-sectional view of the embodiment of the present invention at the screw rack.

Fig. 8b is a partial schematic diagram of Fig. 8a.

Fig. 9a is a cross-sectional view of the embodiment of the present invention at the position of the electric drill.

Fig. 9b is a partial schematic diagram of Fig. 9a.

Fig. 10a is a cross-sectional view of the embodiment of the present invention at the impact position.

Fig. 10b is a schematic partial top view of Fig. 10a.

Fig. 10c is a schematic diagram when the shock gear is loaded and the shock is applied.

Fig. 10d is a schematic diagram when Fig. 10c is converted to a non-impact gear.

[Description of main component symbols]

1 Torque adjustment mechanism

11 The first torsion member

111 First Instruction Department

112 inner flange

113 Second Instruction Department

114 convex part

115 Third Instruction Department

116 grooves

12 screws

13 positioning parts

131 cylindrical part

133 steps

135 Flange

137 protrusion

14 platen

15 fixing parts

151 Convex

17 second torsion member

171 Concave

173 concave

175 gaps

177 Convex

18 third elastic member

19 first spacer

3 gear jump mechanism

31 adjustment parts

311 opening

313 internal thread

315 Convex

33 jump files

35 first elastic member

37 second spacer

5 impact mechanism

51 First Impact Conversions

511 Concave

513 First Extension

515 concave

52 pins

53 second impact conversion

531 Second extension

55 second elastic member

57 first brake

59 second brake part

7 Gearbox front housing

71 cylindrical part

73 Flange

731 external thread

8 reduction mechanism

9 output spindle

91 needle roller bearing

93 concave gasket

95 steel ball

20 output spindle

21 steel balls

22 torque cup

222 gear marking area

2222 Electric drill file marking department

2224 Shock file marking part

23 compression spring

24 planetary gear train

242 transmission chainring

244 planetary gear

246 planetary gear seat

248 internal gear

26 positioning adjustment screw

28 spacers

42, 44 Torque Cup

62 sliding push button

Detailed ways

The implementation of the present utility model is illustrated through specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

The following describes embodiments of the present invention with reference to the accompanying drawings. It should be noted that the present invention is applied to electric tools, such as electric drills, electric screwdrivers or other electric tools, and may include gear box front shells and wear The output shaft passes through the front housing of the gear box, and the front housing of the gear box has a cylindrical part and a flange part formed at one end of the cylindrical part, but in actual implementation, the various types, the number of components and the ratio are not the same as The diagrams and descriptions of this embodiment are limited, and can be changed according to actual design needs, and will be described here first.

Figures 4 to 10d are schematic diagrams drawn according to an embodiment of the impact conversion structure of the electric tool of the present invention, as shown in Figure 4, in this embodiment, the impact conversion structure includes a torque adjustment mechanism 1, connecting the The jump gear mechanism 3 of the torque adjustment mechanism 1 and the impact mechanism 5 located in the gear jump mechanism 3 .

As shown in FIG. 5 , the electric tool includes a gear box front shell 7 and an output spindle 9 passing through the gear box front shell 7 . The gear box front shell 7 has a cylindrical portion 71 and a flange portion 73 formed at one end of the cylindrical portion 71 , wherein the flange portion 73 is formed with a plurality of external threads 731 . Of course, the power tool can also include a deceleration mechanism 8 connected to the output spindle 9 to be connected to the drive source (not shown) of the power tool, because the deceleration mechanism 8 and the drive source can have Principle of action and setting position are not the main improvement technology of the utility model, so they will not be described in detail here.

The torque adjustment mechanism 1 covers the gear box front case 7, and includes a first torsion member 11 rotatably coupled to the output spindle 9, a positioning member 13 arranged in the first torsion member 11, and a positioning member 13 arranged in the first torsion member 11. The fixing part 15 on one side of the positioning part 13 and the second torsion part 17 disposed on the side of the fixing part 15 away from the positioning part 13 .

The jump gear mechanism 3 is connected to the torque adjustment mechanism 1, and includes an adjustment member 31 arranged on the flange portion 73, a plurality of jump gear members 33 pierced through the adjuster member 31, and separately arranged on each of the jump gear members 33. A plurality of first elastic members 35.

The impact mechanism 5 is passed through the output spindle 9, and includes first and second impact conversion parts 51 and 53 located in the flange part 73, and a The second elastic member 55, and the first and second braking members 57 and 59 arranged on the side of the second impact conversion member 53 away from the first impact conversion member 51, the rotation of the first torsion member 11 can make the The output spindle 9 drives the impact mechanism 5, so that the torque adjustment mechanism is linked with the impact mechanism.

As shown in Figure 6a, the first torsion member 11 of this embodiment can be a torsion cup (collar) and has a single control interface, that is to say, the first torsion member 11 is provided with a first indicating portion 111, a second The second indicating part 113 and the third indicating part 115 . The first indication part 111 is, for example, an impact gear indication part, the second indication part 113 is, for example, an electric drill gear indication part, and the third indication part 115 is, for example, a downward pressure indication part and is used to indicate that the first indication part 111 is rotated. The first torsion member 11 needs to be pressed down before the second indicating portion 113 is reached. Of course, the number of the aforementioned indicating parts is not limited to that described in this embodiment.

As shown in FIG. 6b in conjunction with FIG. 5 , the first torsion member 11 is provided with an inner flange 112 on one side, a convex portion 114 on the inner wall, and a groove 116 on the other side away from the inner flange 112 . In this embodiment, a plurality of internal flanges 112 are provided, and internal gear slots are formed between the internal flanges 112 .

As shown in FIG. 7 in conjunction with FIG. 4 and FIG. 5, the positioning member 13 can be an index plate, and has a cylindrical portion 131 accommodated in an opening at one end of the first torsion member 11, and bridges the first torsion member 11. A step portion 133 at one end of the flange portion 73 , a flange portion 135 partially expanded from the step portion 133 , and a protruding portion 137 protruding away from the flange portion 73 from one side of the flange portion 135 . In this embodiment, the cylindrical portion 131 is accommodated in the inner flange 112 , for example. The fixing member 15 can be a fixed ring, and is sandwiched between the positioning member 13 and the second torsion member 17, and has a protruding portion 151 on the periphery. The second torsion member 17 can be a torsion ring (adjust ring), and has a recess 171 annularly arranged on the periphery of the lower surface, corresponding to each of the protrusions 151 and recessed on the upper surface and spaced from each other. 173 , a notch 175 on the side, and a protrusion 177 (see FIG. 8 b ) extending toward the inner ring. The annular recess 171 is used to accommodate the third elastic member 18 such as a spring. In this embodiment, one side of the third elastic member 18 is located in the annular recess 171 , and the other side is connected against a flat first washer (washer) 19 , and the third elastic member 18 The length is greater than the concave depth of the annular concave portion 171 .

The adjusting member 31 can be an adjusting screw (adjust screw), and is passed through the flange portion 73, and for example, a plurality of (for example, 6 in this embodiment) openings 311 are arranged on the inner wall corresponding to the protrusion. The internal thread 313 of the external thread 731 of the edge 73 and the convex portion 315 arranged on the outer periphery, the convex portion 315 corresponds to the convex portion 114 of the first torsion member 11, so as to drive the first torsion member 11 when rotating The adjustment member 31. Each jumper member 33 is passed through the opening 311, and can be a long jumper pin (long pin), and contacts the first pad 19 with one end, and contacts the flat second pad (washer pin) with the other end. ) 37, and the second gasket 37 passes through the flange portion 73 and is disposed on the cylindrical portion 71. Each first elastic member 35 is sleeved on each jumper member 33 and is, for example, a compressing spring. In this embodiment, the length of each first elastic member 35 is shorter than the length of each jumper member 33 .

The first impact conversion member 51 and the second impact conversion member 53 can be an upper impact conversion disc (up changed disc) and a lower impact conversion disc (down changed disc) respectively. In this embodiment, a needle roller bearing 91 can be threaded to the output spindle 9 first, and then a concave washer 93 and a plurality of steel balls can be sequentially arranged on the side of the needle roller bearing 91 threaded to the output spindle 9 95, the upper surface of the first impact conversion member 51 has a concave portion 511 to set these steel balls 95, and the side of the first impact conversion member 51 is provided with a plurality (four in this embodiment) extending longitudinally away from the upper surface. ) the first extension portion 513, the first extension portion 513 can be, for example, a pillar. The second shock conversion member 53 has a plurality of second extensions 531 extending laterally corresponding to the first extensions 513 . In addition, in this embodiment, a pin 52 is provided on one side of the first impact conversion member 51 , as shown in FIG. 5 .

The second elastic member 55 is, for example, a torsion spring, and is arranged on the lower surface of the first impact conversion member 51, and is located in each of the first extension parts 513, so that it can be sandwiched between the first and second impacts. Between the conversion parts 51 and 53.

The first and second braking members 57 and 59 can be, for example, ratchets that cooperate with each other. One side of the impact conversion part 51, the second brake part 59 is passed through the output shaft 9 and is located on the side of the first brake part 57 away from the second impact conversion part 53, and the A gap is maintained between the first and second stoppers 57 and 59 without contact.

The operation mode of this embodiment will be described below.

Firstly, for easy understanding, the first torsion member 11 is omitted in FIG. 8 a , and the first torsion member 11 has fixed the pressure plate 14 to the gear box front shell 7 by screws 12 . As shown in Figure 8a, it is in the state of the screw gear, such as the free state in the first gear, the second torsion member 17 does not press the first washer 19, as shown in Figure 8b, the fixing member 15 The convex portion 151 is fixed to the concave portion 173 of the second torsion member 17, so that the second torsion member 17 cannot rotate; When the member 17 rotates, the adjustment member 31 also rotates clockwise, which can generate axial movement and thereby compress the first elastic members 35, and push up the first gasket 19 and the jump gears at this time. Part 33, that is, the jump gear, and the fixed part 15 and the second torsion member 17 cannot change positions, so that the jump gear is ensured.

When the adjusting member 31 rotates clockwise and descends, it will compress each of the first elastic members 35 , the pressure will increase, and the output torque will also increase accordingly. Therefore, it is possible to jump from the first gear to other gears (for example, there are 22 gears in total in this embodiment, but it is not limited thereto).

At the same time, since the first torsion member 11 is provided with the convex portion 114 on the inner wall, the positioning member 13 has the step portion 133 , the flange portion 135 partially expanded from the step portion 133 , and the flange portion 135 The protruding portion 137 protruding downwards on one side, for example, when the first torsion member 11 is rotated counterclockwise to the first gear or impact gear, the convex portion 114 can hit the flange portion 135 along the step portion 133 and stop Rotation; when, for example, turning the first torsion member 11 clockwise to the 22nd gear, the convex portion 114 can hit the other side of the flange portion 135 with the protruding portion 137 along the step portion 133, and stop the rotation .

In addition, when in the first gear, the first torsion member 11 can be pressed down, and the side of the positioning member 13 can be inserted into the gap 175 of the second torsion member 17 at the same time, then the second torsion member 17 can be driven to continue to the electric drill. gear, shock gear rotation.

As shown in FIG. 9 a and FIG. 9 b (without the schematic diagram of the first torsion member 11 ), it shows the state of being in the position of the electric drill, and the first torsion member 11 has been pressed down.

As shown in Figure 9a, the gear position has turned to the electric drill gear at this time, and the second torsion member 17 has dropped compared to Figure 8a; and as shown in Figure 9b, it is stuck under the convex portion 151 of the fixing member 15, so that Institutions cannot skip gears. Moreover, as shown in Figure 9b, the convex portion 177 of the second torsion member 17 has turned to the side of the latch 52; at this time, if the first torsion member 11 is turned counterclockwise, for example, the impact gear can be driven, that is, from The gear of the electric drill is switched to the impact gear.

As shown in Figures 10a to 10d, after shifting to the impact gear, the second torsion member 17 is still pressed by the convex portion 151 of the fixing member 15, and the gear cannot be skipped, and the latch 52 has been turned counterclockwise to the impact gear ; At this time, the output spindle 9 is subjected to axial pressure, the first extension 513 of the first impact conversion member 51 descends, and the first and second brake members 57 and 59 are engaged to realize the impact. When the impact resets, it needs to rely on the elastic force of the second elastic member 55 .

As shown in Figure 10c, when the impact gear is in place, the first extension 513 of the first impact conversion member 51 is turned away from the plane of the second impact conversion member 53, and the second extension portion 513 of the second impact conversion member 53 531 are staggered, so that the first and second brake members 57 and 59 realize impact. Wherein, the first impact conversion member 51 can have a concave portion 515 disposed on the first extension portion 513 for fixing the pin 52 .

As shown in Figure 10d, in the non-impact position, the first extension 513 of the first impact conversion part 51 is supported by the second extension 531 of the second impact conversion part 53, and the first brake part 57 cannot Dropped, so no impact.

It can be seen from the above that the utility model has only one torque cup in appearance, which is convenient to switch. At the same time, the second torsion member is set as an internal torsion ring, which can quickly switch from the first gear to the electric drill gear and the impact gear, which is convenient to use and has good practicability. In addition, turning clockwise from the first gear can only turn to the last gear (this embodiment is the 22nd gear, but not limited to this), at this time only the first external torsion member rotates, and the internal second torsion The components do not move, and the output torque gradually increases from the first gear. Furthermore, from the first gear, it is not possible to directly turn counterclockwise to the electric drill gear and the impact gear, and press the first external torsion member to turn counterclockwise to the electric drill gear, while the last gear (for example, the 22nd gear) cannot be turned to the electric drill gear. Impact gear; in this way, the first external torsion member must be lifted or pressed down to switch to the electric drill gear and impact gear to achieve a sharp increase in output torque, thereby increasing the safety protection mechanism.

The above-mentioned embodiments only illustrate the principles and effects of the present utility model, but are not intended to limit the present utility model. Any person skilled in the art can modify and change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the utility model should still be covered by the scope of the patent application described later.

Claims (12)

1, a kind of impact transformational structure of electric tool, this electric tool comprises tooth case fore shell and passes the output main shaft of this tooth case fore shell, and the flange part that this tooth case fore shell has cylindrical portion and is formed at this cylindrical portion one end is characterized in that, this impact transformational structure then comprises:

The torsion guiding mechanism, cover this tooth case fore shell, comprise rotation be bonded to first torsion elements of this output main shaft freely, be arranged on keeper in this first torsion elements, be arranged on this keeper a side fixture and be arranged on second torsion elements of this fixture away from a side of this keeper;

Trip-stop mechanism connects this torsion guiding mechanism, comprises the adjustment part that is arranged on this flange part, is arranged in a plurality of trip stop spares of this adjustment part and is separately positioned on respectively a plurality of first elastic components of this trip stop spare; And

Beater mechanism, be arranged in this output main shaft for this this beater mechanism of torsion guiding mechanism interlock, comprise that in this flange part first and second impacts bridgeware, is arranged on first and second and impacts second elastic component between bridgeware and be arranged on this and second impact bridgeware and first impact first and second brake component of a side of bridgeware away from this.

2, the impact transformational structure of electric tool as claimed in claim 1, wherein, this first torsion elements is a torsion cup, and has single control interface.

3, the impact transformational structure of electric tool as claimed in claim 1 is characterized in that: be provided with the inner flange that is positioned at a side in this first torsion elements, be positioned at the protuberance of inwall and be positioned at groove away from the opposite side of this inner flange.

4, the impact transformational structure of electric tool as claimed in claim 1, it is characterized in that: this keeper is an indication location-plate, and have the rank portion of the cylindrical portion that is located in this first torsion elements, one end opening, this flange part one end of cross-over connection, certainly the flange part that extends out of this rank portion part and from this flange part one side towards away from the outstanding protuberance of the direction of this flange part.

5, the impact transformational structure of electric tool as claimed in claim 1, it is characterized in that: this fixture is a retainer plate, and is located between this keeper and this second torsion elements, and has a protuberance that is positioned at periphery.

6, the impact transformational structure of electric tool as claimed in claim 1, it is characterized in that: this second torsion elements is a torsion circle, and have a ring-type be arranged on the lower surface periphery recess, be arranged with a plurality of recesses, be positioned at the breach of side and be positioned at the protuberance that extends towards inner ring in upper surface and each interval.

7, the impact transformational structure of electric tool as claimed in claim 1, it is characterized in that: this adjustment part is an adjustment screw, and be arranged in this flange part, and be equipped with a plurality of perforates, be positioned at inwall corresponding to the externally threaded internal thread of this flange part and the protuberance that is arranged on outer peripheral edges.

8, the impact transformational structure of electric tool as claimed in claim 7, it is characterized in that: respectively this trip stop spare is arranged in this perforate, and is a long trip stop pin, and with an end in contact one first pad, the other end then contacts one second pad.

9, the impact transformational structure of electric tool as claimed in claim 1 is characterized in that: respectively this first elastic component is to be sheathed on the respectively compression spring of this trip stop spare, and respectively the length of this first elastic component less than the length of this trip stop spare respectively.

10, the impact transformational structure of electric tool as claimed in claim 1, it is characterized in that: this first impact bridgeware and this second impact bridgeware are respectively and impact changeover panel on one and impact changeover panel once, this first side of impacting bridgeware then is provided with a plurality of first extensions of longitudinal extension away from this upper surface, and this second impact bridgeware then has corresponding respectively this first extension and a plurality of second extensions of horizontal expansion.

11, the impact transformational structure of electric tool as claimed in claim 10, it is characterized in that: this second elastic component is a torsion spring, and be arranged on this and first impact the lower surface of bridgeware, and be positioned at respectively within this first extension, be located in thus this first and second impact between the bridgeware.

12, the impact transformational structure of electric tool as claimed in claim 1 is characterized in that: this first and second brake component is the ratchet of working in coordination.

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