CN218195000U - Electric tool - Google Patents

Abstract

The utility model relates to an electric tool technical field for solve the electric tool among the prior art and appear jumping the problem of shelves when using the maximum torsion value of setting for easily, provides an electric tool, including gear box, function switching structure and pressure adjustment structure, one end in the gear box is provided with the ring gear, and gear box overcoat function switching structure, function switching structure include impact ring, function switching ring and drive function switching ring pivoted function switching knob, and pressure adjustment structure includes pressure adjustment knob, wherein: the function switching ring is sleeved on the first cylindrical surface of the gear box, and a limiting part for controlling the function switching ring to move outwards along the axial direction of the first cylindrical surface of the gear box is further arranged on the first cylindrical surface of the gear box.

Description

Electric tool

Technical Field

The utility model relates to an assembling tool technical field specifically is an electric tool.

Background

As a commonly used decoration electric tool, for convenient use, the electric drill integrates three gears of a screw gear, an electric drill gear and an impact gear. When the electric tool is used, the user can realize the switching of gears by rotating the function switching knob on the electric tool, and the adjustment of the torque force can be realized by rotating the pressure adjusting knob.

Because the existing electric tool comprises a gear box, an inner gear ring, a function switching structure, a pressure adjusting structure, a bearing front end cover and the like, wherein the function switching structure comprises a function switching knob, a function switching ring and an impact ring, a spring is arranged between the impact ring and the pressure adjusting structure, one surface of the impact ring, which faces the inner gear ring, is provided with a plurality of bulges, steel balls are arranged at the tops of the bulges, and the inner gear ring is also provided with a plurality of bulges with circular arcs; if the impact ring is fixed in the axial direction, when the protrusions on the inner gear ring are contacted with the steel balls on the protrusions of the impact ring in the rotating process of the inner gear ring, the protrusions of the inner gear ring are resisted by the steel balls on the impact ring because the impact ring cannot move in the axial direction, and the protrusions of the inner gear ring and the steel balls reach the maximum contact ratio, so that the maximum set torque value is reached. In the use process of the existing electric tool, the situation of gear jumping is often easy when the maximum set torsion value is used, the normal use of the electric tool is influenced, and the working efficiency of a user is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides an electric tool to solve the electric tool among the prior art and appear jumping the problem of shelves easily in using the maximum settlement torsion value.

The utility model provides a basic scheme is: the utility model provides an electric tool, includes gear box, function switching structure and pressure regulation structure, and one end in the gear box is provided with the ring gear, and gear box overcoat function switching structure, function switching structure include impact ring, function switching ring and drive function switching ring pivoted function switching knob, and pressure regulation structure includes pressure regulation knob, wherein: the function switching ring is sleeved on the first cylindrical surface of the gear box, and a limiting piece for controlling the function switching ring to move outwards along the axial direction of the first cylindrical surface of the gear box is further arranged on the first cylindrical surface of the gear box.

The basic scheme has the beneficial effects that: after analyzing the problem that the conventional electric tool is likely to cause gear skipping when the maximum set torque value is used, it is found that, in the conventional electric tool, the function switching structure and the pressure adjusting structure are switched and adjusted in a rotating manner, so that in order to ensure that the function switching structure and the pressure adjusting structure can rotate smoothly, a gap is left between the function switching structure and the pressure adjusting structure in the axial direction, and the gap in the axial direction of the electric tool is also enlarged due to the fact that the middle thread is usually a trapezoidal thread, and furthermore, in the process of producing the electric tool, errors occur due to the fact that a die, a manufacturing process, an assembling process and the like, so that the gap in the axial direction of the electric tool is further enlarged, correspondingly, the gap in the axial direction between the inner gear ring and the impact ring is also enlarged, so that the distance of axial movement of the impact ring is enlarged, and the overlap ratio of the steel ball on the impact ring and the inner gear ring protruding portion is reduced, and therefore the gear skipping occurs.

Therefore, in the scheme, the mode of arranging the limiting part on the first cylindrical surface of the gear box is adopted, the axial movement of the switching ring is controlled by utilizing the limiting part control function, the mode of thread control is replaced, a series of axial gaps caused by a thread connection mode can be avoided, the axial gaps comprise axial gaps caused by assembly, manufacturing, threads and the like, so that the axial gap between the inner gear ring and the impact ring can be ensured within a normal range, namely, when the maximum set torsion value is reached, the maximum coincidence degree can be reached between the protrusions of the inner gear ring and the steel balls protruding on the impact ring, the problem of gear jumping when the maximum set torsion value is used can be avoided, the normal use of the electric tool is ensured, and the working efficiency is improved.

Further, the pressure adjustment structure includes pressure adjustment spring, and pressure adjustment spring's one end sets up on the pressure adjustment structure, and the other end passes behind locating part and the function switching ring and offsets with the impact ring. Has the advantages that: in this scheme, pass the setting that offsets with the impact ring behind locating part and the function switching ring with pressure adjusting spring, make things convenient for the inside installation of pressure adjusting spring at electric tool.

Further, a plurality of first protrusions are arranged on the outer circumference of the function switching ring. Has the beneficial effects that: in this scheme, first bellied setting up provides the impetus for rotating function switching ring, and the convenience is to the rotation of function switching ring, simple structure.

Further, the function switching knob is provided with a plurality of clamping grooves which are in interference fit with the first bulges along the axial direction of the first cylinder of the gear box. Has the advantages that: in this scheme, utilize draw-in groove and the protruding interference fit's of first protruding mode of setting on the function switching knob to have realized on the one hand that the function switching knob drives the rotation of function switching ring, on the other hand interference fit's mode can guarantee the zonulae occludens of function switching knob and function switching ring.

Furthermore, one side of the function switching ring, which is far away from the limiting part, is provided with a plurality of second bulges along the circumferential surface, and the impact ring is provided with a plurality of first grooves corresponding to the second bulges. Has the advantages that: in this scheme, the switching of gear can be realized to the cooperation that utilizes the second arch and first recess, and the function that can both realize brill or hammer drill rotates to the protruding arbitrary direction of controlling with first recess of second at function switching ring, and when the protruding and first recess of second corresponds, the function is the screw, and the pressure regulation structure will play a role this moment, can adjust by little to big through pressure adjustment knob, and the torsion value of segmentation regulation settlement.

Furthermore, the inner circumference of the impact ring is provided with a plurality of third bulges along the radial direction, and the third bulges are provided with cylinders in one-to-one correspondence. Has the beneficial effects that: in this scheme, the setting of arch and cylinder makes things convenient for pressure adjustment spring's setting, simple structure.

Furthermore, the pressure adjusting structure comprises a pressure adjusting spring, and the pressure adjusting spring penetrates through the limiting part and is sleeved on the cylinder in a function switching ring mode. Has the beneficial effects that: in this scheme, cup joint the pressure regulating spring on the cylinder, make things convenient for the connection of pressure regulating spring, simple structure.

Furthermore, the function switching knob is provided with a plurality of second grooves towards one end of the gearbox seat along the axial direction, the gearbox seat is provided with a rear reed, and a protruding part of the rear reed is inserted into the second grooves. Has the advantages that: in this scheme, under the gear state of difference, the bellying of back reed inserts in the second recess of difference, can realize the feedback that the gear switched through the cooperation of the second recess that sets up and back reed bellying, and the operator can know the gear and switch the result clearly, and the result is operated.

Further, the circumference of the function switching ring and the circumference of the impact ring are provided with a third groove opposite to the second groove. Has the advantages that: in this scheme, the setting of third recess makes things convenient for the cover of function switching knob on the gear box to establish.

Further, a bearing and a bearing front end cover for controlling the size of the front circumference of the second cylindrical surface of the gear box and the movement of the bearing are arranged on the front circumference and the front end surface of the second cylindrical surface of the gear box. Has the advantages that: in the scheme, the front end cover of the bearing is used for controlling the circumferential size and the movement of the bearing, and the structure is simple.

Furthermore, the gear box comprises a pressing plate, wherein the pressing plate is positioned on one side, far away from the gear box seat, of the front end cover of the bearing. Has the advantages that: in this scheme, the setting of clamp plate can avoid the bearing front end housing directly to receive external impact to reduce the probability that the bearing front end housing damaged appears, prolonged the life of bearing front end housing, can also prevent moving outward of bearing.

Further, the pressing plate is provided with two fourth protrusions facing the gear box base and controlling the circumferential rotation angle of the pressure adjusting knob. Has the advantages that: in this scheme, utilize two fourth archs that set up on the clamp plate to control pressure adjustment knob's rotation angle, simple structure.

Further, the bearing front end cover and the pressure plate comprise five holes corresponding to screw holes at the front end of a second cylinder of the gear box. Has the beneficial effects that: in this scheme, the angle error of initial installation can be controlled in the setting in the hole that corresponds with the screw on the clamp plate, and the setting in odd number hole can be prevented staying moreover.

Drawings

Fig. 1 is a schematic view of an embodiment of an electric tool according to the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a schematic structural view of the gearbox of FIG. 2;

FIG. 4 is a schematic view of the impingement ring of FIG. 2;

FIG. 5 is a schematic structural diagram of the functional switching ring of FIG. 2;

FIG. 6 is a schematic structural diagram of the function switching knob shown in FIG. 2;

FIG. 7 is a schematic view of the internal structure of FIG. 1;

FIG. 8 is a schematic structural view of the front end cap of the bearing of FIG. 2;

FIG. 9 is a schematic structural view of the front end cover of the bearing after the front spring plate is installed;

FIG. 10 is a schematic view of the platen of FIG. 2;

FIG. 11 is a schematic view of the pressure adjustment knob of FIG. 2;

FIG. 12 is a schematic view of the front end cap and the pressure plate of the bearing of FIG. 2 after they are connected;

FIG. 13 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 14 is a cross-sectional view taken at C-C of FIG. 1;

fig. 15 is a schematic view illustrating the rotation of the function switching ring of fig. 7.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a gear box 1, a clamping groove a10, an inner gear ring 11, a rear reed 14, a function switching knob 2, a second groove 20, a clamping groove 21, an impact ring 3, a third protrusion 31, a first groove 32, a function switching ring 4, a second protrusion 41, a first protrusion 42, a third groove 43, a clamping ring 5, a pressure adjusting knob 6, an adjusting groove 60, a pressure adjusting spring 61, a pressure adjusting seat 7, a bearing front end cover 8, a jack 80, a pressing plate 9, a fourth protrusion 92 and a front reed 93.

The embodiment is substantially as shown in figures 1, 2 and 7 of the accompanying drawings: the utility model provides an electric tool, includes gear box 1, function switching structure and pressure regulation structure, and gear box 1 overcoat has the function switching structure, is provided with ring gear 11 in the gear box 1, and a terminal surface of ring gear 11 is provided with a plurality of archs, and ring gear 11 is provided with 6 archs towards the one end axial of impact ring 3 in this embodiment at even interval, and bellied one end is circular-arc.

As shown in fig. 3-6, the function switching structure includes an impact ring 3, a function switching ring 4, and a function switching knob 2 for driving the function switching ring 4 to rotate, the function switching ring 4 is sleeved on a first cylindrical surface of the gear box 1, a limiting member for controlling the function switching ring 4 to move axially outwards along the first cylindrical surface of the gear box 1 is further disposed on the first cylindrical surface of the gear box 1, specifically, in this embodiment, the limiting member is a clamping ring 5, or the limiting member may also be a clamping ring or the like, a clamping groove a10 is disposed on the gear box 1, and the clamping ring 5 is disposed in the clamping groove a 10.

The outer circumference of the function switching ring 4 is provided with a plurality of first bulges 42, the inner side of the function switching knob 2 is provided with a plurality of clamping grooves 21 which are in interference fit with the first bulges 42 along the axial direction of a first cylinder of the gear box 1, the function switching knob 2 drives the function switching ring 4 to rotate through the matching of the clamping grooves 21 and the first bulges 42, specifically, the outer circumference of the function switching ring 4 is uniformly provided with three first bulges 42 at intervals, and correspondingly, the inner side of the function switching knob 2 is provided with three clamping grooves 21; the surface of the function switching ring 4 far away from the clamping ring 5 is provided with a plurality of second protrusions 41 along the circumferential surface, and the impact ring 3 is provided with a plurality of first grooves 32 corresponding to the second protrusions 41.

The function switching knob 2 is provided with a plurality of second grooves 20 in the axial direction toward one end of the gear box 1 seat, the gear box 1 seat is provided with a rear spring 14, and a convex part of the rear spring 14 is inserted into the second grooves 20, as shown in fig. 13. The circumference of the function switching ring 4 and the circumference of the impact ring 3 are each provided with a third groove 43 opposite to the second groove 20.

A plurality of third protrusions 31 are radially arranged on the inner circumference of the impact ring 3, the third protrusions 31 are provided with cylinders in a one-to-one correspondence manner, a plurality of steel balls are arranged on the other surface of the inner circumference of the impact ring 3, or a plurality of bosses are arranged on the other surface of the inner circumference of the impact ring 3, and one ends of the bosses facing the inner gear ring 11 are provided with the steel balls.

As shown in fig. 7-12, the pressure adjusting structure includes a pressure adjusting knob 6, a pressure adjusting spring 61 and a pressure adjusting seat 7, one end of the pressure adjusting spring 61 is disposed on the pressure adjusting seat 7, and the other end of the pressure adjusting spring passes through the limiting part and the function switching ring 4 and then abuts against the impact ring 3, specifically, a connecting column is disposed on the pressure adjusting seat 7, one end of the pressure adjusting spring 61 is sleeved on the connecting column, the other end of the pressure adjusting spring 61 passes through the clamping ring 5 and the function switching ring 4 and is sleeved on the cylinder on the impact ring 3, or connecting grooves are disposed at corresponding positions on the pressure adjusting seat 7 and the impact ring 3, and two ends of the pressure adjusting spring 61 are respectively disposed in the connecting grooves.

The front circumference and the front end face of the second cylindrical surface of the gear box 1 are provided with a bearing and a bearing front end cover 8 for controlling the size of the front circumference of the second cylindrical surface and the movement of the bearing. One side of the bearing front end cover 8, which is far away from the gear box 1 seat, is provided with a pressing plate 9, the pressing plate 9 is provided with two fourth protrusions 92 which face the gear box 1 seat and control the circumferential rotation angle of the pressure adjusting knob 6, and the bearing front end cover 8 is provided with a jack 80 matched with the fourth protrusions 92. The bearing front cover 8 and the pressure plate 9 comprise five holes corresponding to the screw holes of the second cylindrical front end of the gear box 1.

As shown in fig. 9, a front spring 93 is provided on the bearing front end cover 8, a plurality of adjustment grooves 60 are provided on the inner wall of the pressure adjustment knob 6, and adjustment projections of the front spring 93 are inserted into the adjustment grooves 60, as shown in fig. 14.

The specific implementation process is as follows: when the functional gear needs to be switched to a screw gear in use, the function switching knob 2 is rotated, the second protrusion 41 on the function switching ring 4 corresponds to the first groove 32 of the impact ring 3, as shown in fig. 7, so that the protrusion on the inner gear ring 11 collides with the steel ball on the impact ring 3 during the rotation of the inner gear ring 11, at this time, because the second protrusion 41 on the function switching ring 4 corresponds to the first groove 32 of the impact ring 3, a moving space is formed between the impact ring 3 and the function switching ring 4, the protrusion on the inner gear ring 11 extrudes the steel ball on the impact ring 3 to move outwards, the impact ring 3 moves outwards, so that the protrusion on the inner gear ring 11 is separated from the surface of the steel ball on the impact ring 3, and the inner gear ring 11 continues to rotate circumferentially, thereby achieving the function of screwing.

When the functional gear needs to be switched to a drill or hammer drill gear, as shown in fig. 15, the second protrusions 41 on the functional switching ring 4 rotate to any direction from left to right of the first grooves 32 of the impact ring 3, at this time, the second protrusions 41 of the functional switching ring 4 are staggered with the first grooves 32 of the impact ring 3, and the second protrusions 41 of the functional switching ring 4 abut against the circumferential surface of the impact ring 3, so that when the protrusions on the inner ring gear 11 collide with the steel balls on the impact ring 3 in the rotation process of the inner ring gear 11, the functional switching ring 4 cannot move outwards due to the action of the clamping ring 5, so as to abut against the movement of the impact ring 3, and then the protrusions on the inner ring gear 11 are abutted against the steel balls on the impact ring 3, so as to be incapable of continuing to rotate, and the protrusions on the inner ring gear 11 and the steel balls on the impact ring 3 reach the maximum overlap ratio, thereby realizing the drill or hammer drill function.

In the process of switching the function gears, when the function switching knob 2 is rotated, the protruding parts of the back spring pieces 14 are inserted into the different second grooves 20, so as to generate a sound, thereby prompting the user to complete the function gear switching.

When the pressure gear needs to be switched, the pressure adjusting structure plays a role at the moment, and the set torsion value can be adjusted from small to large by the pressure adjusting knob 6 in a sectional manner. When the set torsion value is adjusted, the pressure adjusting knob 6 is rotated, and the adjusting protrusions of the front reeds 93 on the front bearing cover 8 are inserted into the different adjusting grooves 60 on the pressure adjusting knob 6, so that the soft torque is adjusted from the minimum torque value to the maximum torque value, and a sound is generated to prompt the user that the pressure adjustment is completed, as shown in fig. 14.

Taking soft torque as an example, under a screw gear, in the process of rotating the pressure adjusting knob 6, the pressure adjusting spring 61 is gradually compressed, and when the pressure adjusting spring 61 is compressed to the shortest, the impact ring 3 will receive the maximum acting force given by the pressure adjusting spring 61, so as to realize the output of the maximum soft torque, and enable the electric tool to reach the maximum soft torque.

The above description is only for the embodiments of the present invention, and the common general knowledge of the known specific structures and characteristics in the schemes is not described herein too much, and those skilled in the art will know all the common technical knowledge in the technical field of the present invention before the application date or the priority date, can know all the prior art in this field, and have the ability to apply the conventional experimental means before this date, and those skilled in the art can combine their own ability to perfect and implement the schemes, and some typical known structures or known methods should not become obstacles for those skilled in the art to implement the present application. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (13)

1. The utility model provides an electric tool, includes gear box, function switching structure and pressure regulation structure, one end in the gear box is provided with the ring gear, the gear box overcoat the function switching structure, the function switching structure is including strikeing ring, function switching ring and drive function switching ring pivoted function switches the knob, the pressure regulation structure includes pressure regulation knob, its characterized in that: the function switching ring is sleeved on the first cylindrical surface of the gear box, and a limiting piece for controlling the function switching ring to move outwards along the axial direction of the first cylindrical surface of the gear box is further arranged on the first cylindrical surface of the gear box.

2. The power tool of claim 1, wherein: the pressure adjusting structure comprises a pressure adjusting spring, one end of the pressure adjusting spring is arranged on the pressure adjusting structure, and the other end of the pressure adjusting spring penetrates through the limiting part and the functional switching ring and then abuts against the impact ring.

3. The power tool of claim 1, wherein: the function switching ring is provided with a plurality of first bulges on the outer circumference.

4. The power tool of claim 3, wherein: the function switching knob is provided with a plurality of clamping grooves which are in interference fit with the first bulges along the axial direction of the first cylinder of the gear box.

5. The power tool according to any one of claims 1 to 4, wherein: one side of the function switching ring, which is far away from the limiting part, is provided with a plurality of second bulges along the circumferential surface, and the impact ring is provided with a plurality of first grooves corresponding to the second bulges.

6. The power tool of claim 5, wherein: the inner circumference of the impact ring is provided with a plurality of third bulges along the radial direction, and the third bulges are provided with cylinders in one-to-one correspondence.

7. The power tool of claim 6, wherein: the pressure adjusting structure comprises a pressure adjusting spring, and the pressure adjusting spring penetrates through the limiting part and the function switching ring and is sleeved on the cylinder.

8. The power tool of claim 7, wherein: the function switching knob faces towards one end of the gearbox base, a plurality of second grooves are formed in the axial direction of the gearbox base, the gearbox base is provided with a rear reed, and a protruding portion of the rear reed is inserted into the second grooves.

9. The power tool of claim 8, wherein: the circumference of the function switching ring and the circumference of the impact ring are provided with third grooves opposite to the second grooves.

10. The power tool of claim 9, wherein: and the front circumference and the front end surface of the second cylindrical surface of the gear box are provided with a bearing, a bearing front end cover for controlling the size of the front circumference of the second cylindrical surface of the gear box and the movement of the bearing.

11. The power tool of claim 10, wherein: the gearbox base is characterized by further comprising a pressing plate, wherein the pressing plate is located on one side, far away from the gearbox base, of the bearing front end cover.

12. The power tool of claim 11, wherein: the pressure plate is provided with two fourth bulges facing the gear box seat and controlling the circumferential rotation angle of the pressure adjusting knob.

13. The power tool of claim 12, wherein: the bearing front end cover and the pressure plate comprise five holes corresponding to screw holes at the front end of a second cylinder of the gear box.

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