CN201098886Y - Electric tools with working mode quick switching device - Google Patents

Abstract

The utility model provides an electric tool with a working mode quick switching device comprising: a casing; a motor providing driving force; a gear box device for outputting torque; a first adjusting cup for adjusting the output torque of the third inner ring gear of the gear box; The second adjusting cup that realizes the quick change of the working mode of the tool; the locking part that selectively cooperates with the third ring gear through the second adjusting cup, and the locking part has two working positions, in the first working position The locking part cooperates with the third ring gear when in the second working position, and disengages from the third ring gear when in the second working position; the spring assembly cooperates with the locking part to provide elastic force for the locking part. The tool can quickly lock the rotation of the third inner ring gear by adjusting the working mode quick-changing device consisting of the working mode quick-changing cup, spring and locking parts, so as to realize the fast switching from the screwdriver working mode to the drilling working mode.

Description

Electric tools with working mode quick switching device

technical field

The utility model relates to an electric tool with a working mode quick switching device, in particular to an electric tool with at least two working modes of a drill and a screwdriver.

Background technique

The switching of currently known screwdrivers, drills and impact working modes is realized by one or two function regulating cups. A tool with only one adjusting cup. The adjusting cup is usually a torque adjusting cup. The tool can adjust the output torque of the screwdriver by turning the torque adjusting cup in the screwdriver working mode. In order to switch between different working modes, it is necessary to turn the torque adjusting cup to its extreme position, and the two extreme positions of the torque adjusting cup correspond to the drilling and impact working modes respectively. There are two adjustment cup tools, one adjustment cup is the torque adjustment cup, and the other adjustment cup is usually the impact mode adjustment cup. The torque adjusting cup can adjust the output torque of the screwdriver and realize the switching between the screwdriver and the drill. The shock mode adjustment cup is only used to select the shock mode.

Whether it is a tool with a single cup or a double cup, the same thing is that the torque adjustment cup is used to switch the working mode of the drill and the screwdriver. This kind of working mode switching method needs to turn the torque adjustment cup to its limit position, not only The operation is cumbersome, and the maintenance of the working mode after switching is unstable. It is easy to cause the tool to work unstable due to torque overload during the drilling process and affect the drilling quality.

Utility model content

In order to solve the problem of inconvenient and unstable switching between the two working modes of the drill and the screwdriver in the existing technical solution, the utility model provides an electric motor that uses double cups to realize the switching of multiple working modes. Tool, this kind of electric tool can not only realize fast switching between working modes, but also realize it in a convenient and reliable way.

The technical solution adopted by the utility model to solve the technical problem is: the tool has two adjustment cups, one is a torque adjustment cup that can realize the adjustment of the output torque of the tool and the switching between the two working modes of the screwdriver and the drill, and the other adjustment cup is A quick-change selection cup that realizes three working modes of tool selection screwdriver, drill and impact.

A work mode quick change device independent of tool torque adjustment is added between the gear box of the tool and the torque adjustment cup. It mainly includes a work mode selection cup, a locking part and a spring assembly. The working mode selection cup can rotate around the axis of the machine tool but move axially, and the tool can be quickly switched among the three working modes of screwdriver, drill and impact just by turning it according to the marking on the working mode selection cup. The locking part can be located at the first working position or the second working position under the adjustment of the working mode selection cup, so as to selectively cooperate with or disengage from the third ring gear of the torque output of the gearbox. The spring assembly exerts different elastic forces when the locking part is in different working positions, so as to keep the locking part moving in a predetermined track without loosening and failing.

The outstanding point of the utility model is that the fast switching among the three working modes of screwdriver, drilling and impact can be realized without complicated operation, and the effect after switching is safer and more stable.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a perspective view of an electric tool according to the present invention.

Fig. 2 is an exploded view of the front end of the tool according to the first embodiment of the present invention.

Fig. 3A is a structural view of the working mode selection cup according to the first embodiment of the present invention.

Fig. 3B is a structural diagram of the working mode selection cup according to the second and third embodiments of the present invention.

Fig. 4 is an assembly relationship diagram of the embodiment quick change device in Fig. 2 when it is in the screwdriver working mode.

Fig. 5 is an assembly diagram of the embodiment quick change device in Fig. 2 when it is in the drilling mode.

Fig. 6 is an assembly diagram of the quick change device according to the second embodiment of the present invention when it is in the screwdriver working mode.

Fig. 7 is an assembly diagram of the quick change device according to the second embodiment of the present invention when it is in the drilling mode.

Fig. 8 is an assembly diagram of the quick change device according to the third embodiment of the present invention when it is in the screwdriver working mode.

Fig. 9 is an assembly diagram of the quick change device according to the third embodiment of the present invention when it is in the drilling mode.

Detailed ways

The power tool shown in Figure 1 includes two adjusting cup structures, the adjusting cup on the side near the drill bit is the torque adjusting cup 11, and the adjusting cup on the side near the gear box is used to switch between the three working modes of drill, screwdriver and impact Select Cup 10 for the working mode. The torque adjustment cup 11 is mainly used when the tool is in the screwdriver working mode. In the tool shown in FIG. 1 , another working mode selection cup 10 is independent of the output torque adjustment of the tool. When the torque adjustment cup 11 indicates any output torque position, turn the work mode selection cup 10 along the direction marked "drill" on the tool as shown in Figure 1, so that it turns from the position indicating the "screwdriver" working mode to the direction indicated The position of the "drilling" working mode can quickly lock the rotation of the third inner ring gear 14 through the action of the working mode quick change device composed of the working mode quick change cup 10, spring 17 and locking part 18, so as to realize the screwdriver work Quick switch from mode to drill working mode. Similarly, when the screwdriver working mode is switched to the impact working mode, it is only necessary to turn the working mode selection cup 10 in the opposite direction of the auxiliary handle in Fig. According to the position of the "impact" working mode, by adjusting the cooperation relationship with the impact device located at the front end of the tool, the quick switch from the screwdriver working mode to the impact working mode is realized.

Figure 2 shows an exploded view of the front end of the tool according to the first embodiment of the present invention. The components located at the front end of the tool include: gearbox front housing 13, working mode quick change cup 10, third inner ring gear 14, steel ball 15, steel column 16, spring 17, pin 18, shaft lock hexagon piece 19, gasket 20. Fixed impact tooth 21, torsion spring 22, fixed conversion block 23, dynamic impact tooth 24, impact spring 25, simple bearing lower gasket 26, simple bearing 27, circlip 28, simple bearing upper gasket 29, dynamic conversion block 30, torque thread 32, torque cup 11, shrapnel bracket 33, positioning shrapnel 34, torque cup end plate 35 and output shaft 36. It can be seen from the figure that the working mode quick change device of this embodiment is composed of a working mode quick change cup 10 , a pin 18 and a spring 17 . Fig. 3A shows the structure of the quick change cup in working mode, at least one projection 37 is distributed around its central axis on its inner ring, and there is a bracket 38 on the outer end surface facing the side of the torque adjustment cup. The bracket 38 is used to control the fixed conversion block 23 at the front end of the tool. Turn the working mode quick change cup 10 in the direction marked with "impact" as shown in Figure 1, and adjust the matching relationship between the bracket on the quick change cup and the impact device at the front end of the tool, so as to realize the switching between the screwdriver and the impact working mode. The structure of the switching impact working mode adopted by the utility model is a known technology, so no more description will be made on switching the impact working mode here.

Fig. 4 shows the cooperation relationship of the quick change device when the tool of the first embodiment is in the screwdriver working mode. In this working mode, the working mode selection cup is indicated at the "screwdriver" position. The locking pin 18 in the quick change device is in the second working position, one end of which cooperates with the non-protruding surface 41 of the inner ring of the working mode selection cup 10, and the other end is separated from the third inner ring gear in the inner groove of the casing middle. Spring 17 is enclosed within on the pin, connects pin 18 and notch in the casing.

Fig. 5 shows the cooperation relationship of the quick change device when the tool of the first embodiment is in the drilling mode. Rotate the working mode selection cup 10 along the direction marked "drill" on the tool as shown in Figure 1, so that it turns from the position indicating "screwdriver" to the position indicating "drill". In this working mode, since the pin 18 has locked the rotation of the third ring gear, turning the torque adjusting cup 11 will no longer affect the output torque of the tool. At this time, the pin 18 in the quick-change device is in the first working position, and one end of the pin 18 cooperates with the protrusion surface 42 of the inner ring of the working mode selection cup 10, so that the other end is pushed along the axial direction of the output shaft, and stretches out under the pushing action. The groove in the housing cooperates with the third ring gear 14 to lock the third ring gear 14 so that it cannot rotate freely and output the maximum torque, thereby realizing the drilling working mode. The movement of the pin 18 causes the spring 17 to be further compressed, and the elastic force provided by the spring ensures that the pin 18 can be pushed back to the non-bulge surface of the inner ring of the quick change cup when the working mode selection cup 10 is turned back to the screwdriver working mode Cooperate.

Fig. 6 shows the second embodiment of the present invention, where the tool is in the working mode of the screwdriver and the cooperation relationship of the quick change device. As can be seen from the figure, the quick-change device of this embodiment is made up of a working mode quick-change cup 10', an annular locking part 18' and a spring 17'. The working mode quick change cup 10' as shown in Fig. 3B has at least one protrusion 37' distributed on its rear end surface around its central axis. Teeth are distributed on the inner and outer rings of the annular locking part 18', and the inner teeth can selectively cooperate with the teeth on the outer ring of the third gear ring, and the outer teeth cooperate with the inner side of the casing so that the locking part can only move along the output shaft 36. axial movement. At least one pillar is distributed on the front end face of the annular locking part 18' facing the drill bit direction, for connecting the working mode quick change cup 10', and is connected with the spring 17' on its rear end face facing the gear box direction. In this working mode, the ring-shaped locking part 18' is in the second working position, and the column cooperates with the convex surface 42' on the inner end surface of the working mode cup under the action of the working mode selection cup 10'. The annular locking part 18 ′ connected with the column is pushed axially to disengage from the third ring gear 14 , and the output torque of the tool can be adjusted by adjusting the torque adjusting cup 11 . The spring 17' connected to the rear end surface of the ring-shaped locking part 18' is squeezed to generate elastic force to ensure that the ring-shaped locking part can quickly return from the state of being separated from the gear when the ring-shaped locking part is switched from the screwdriver working mode to the drilling working mode. to match state. Figure 7 shows the cooperation relationship of the quick change device when the tool is in the drilling mode. Rotate the work mode selection cup 10' in the direction where the auxiliary handle shown in Figure 1 is, so that it turns from the indication "screwdriver" work mode to the "drill" work mode. In this working mode, the ring-shaped locking part 18' is in the first working position, and the column is matched with the non-bump surface 41' on the inner end surface of the quick-change cup in the working mode. At this time, the inner ring of the ring-shaped locking part 18' The teeth cooperate with the outer ring teeth of the third inner ring gear 14 . Since the locking part 18' cannot rotate, the rotation of the third ring gear 14 is locked, so that the tool can perform the working mode of drilling with a stable maximum output torque.

Fig. 8 shows the cooperation relationship of the quick change device according to the third embodiment of the present invention when the quick change device is in the screwdriver working mode. The place where the third embodiment has changed relative to the second embodiment is the structure of the locking part. The locking part that adopts in this embodiment is at least one pin 18 ". As can be seen from Fig. 8, Fig. 9, the operating principle of the working mode quick-changing device of the third embodiment is the same as that of the second embodiment. The rotating working mode The selection cup 10' makes the pin 18" in the first position, one end of which cooperates with the non-bulge surface 41' of the working mode selection cup 10', and the other end cooperates with the teeth on the outer ring of the third inner ring gear 14 to lock the third ring gear. The rotation of the gear ring 14 realizes the operation of the tool in the drill working mode (shown in FIG. 9 ). Rotate the work mode selection cup 10' in the opposite direction to make the pin 18 "second work mode, one end of which cooperates with the convex surface 42' of the work mode selection cup 10', and the other end disengages from the outer ring teeth of the third ring gear 14 Cooperate, so as to switch back to the screwdriver mode (as shown in Figure 8).

The utility model is not limited to the above-mentioned embodiments, any structure that uses a non-torque adjustment structure to realize fast switching between the screwdriver and the drill working mode, and others that can be easily thought of by those of ordinary skill in the art by virtue of the utility model Similar technical solutions are within the protection scope of the present utility model.

Claims (10)

1. the electric tool with the mode of operation apparatus for fast switching comprises:

Casing;

The motor of driving force is provided;

The gear box device of output torque;

First of regulating tooth roller box the 3rd ring gear output torque is regulated cup;

Second of implementation tool mode of operation quick change is regulated cup;

Regulate the Lock Part that cup optionally cooperates with described the 3rd ring gear by second, it is characterized in that described Lock Part has two operating positions, Lock Part cooperates with described the 3rd ring gear when first operating position, and Lock Part and described the 3rd ring gear break away from when second operating position.

2. the electric tool described in claim 1 is characterized in that the spring assembly that cooperates with described Lock Part provides elastic force for Lock Part.

3. the electric tool described in claim 2 is characterized in that the described second interior ring of regulating cup is distributed with a projection at least.

4. the electric tool described in claim 3 is characterized in that described Lock Part has a pin at least, and the lug surface that an end of selling when first operating position and second is regulated ring in the cup cooperates, the protruding cooperation on the outer shroud of the other end and the 3rd ring gear; An end of selling when second operating position cooperates with the second non-lug surface of regulating ring in the cup, and the other end breaks away from the 3rd ring gear.

5. the electric tool described in claim 4 is characterized in that described spring assembly can be to be enclosed within on the pin, is in compressive state when locking is positioned at first operating position.

6. the electric tool described in claim 2 is characterized in that described second regulates on the rear end face of cup and be distributed with a projection at least.

7. the electric tool described in claim 6 is characterized in that described Lock Part has a pin at least.The non-lug surface that an end of selling when first operating position and second is regulated the cup rear end face cooperates, and the projection on the outer shroud of the other end and the 3rd ring gear cooperates; An end of selling when second operating position cooperates with second lug surface of regulating ring in the cup, and the other end breaks away from the 3rd ring gear.

8. the electric tool described in claim 6 is characterized in that described Lock Part can be that an inner and outer ring all has tooth, and an end is regulated the ring that cup is connected by at least one pin with second.Pin cooperates with the second non-lug surface of regulating cup when first operating position, and ring cooperates with the 3rd ring gear; Pin cooperates with second lug surface of regulating cup when second operating position, and ring and the 3rd ring gear break away from.

9. the electric tool described in one of claim 7 or 8 is characterized in that described spring assembly is positioned at an end of Lock Part, is in compressive state when Lock Part is positioned at second operating position.

10. the electric tool described in claim 1 is characterized in that described second its front end face of adjusting cup has annular support, and regulating cup by second can optionally cooperate the percussion mechanism of support with the instrument front end.

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