CN218364551U - Hand-held electric tool - Google Patents

Abstract

The utility model relates to an electric tool technical field refers in particular to a hand-held type electric tool. The motor comprises a shell, wherein a motor, a gearbox and a battery assembly are arranged in the shell, and the gearbox is arranged at the front end of the motor; the casing includes: the outer wall of the rear part of the left machine shell is inwards sunken to form a first sunken part; the outer wall of the rear part of the right machine shell is inwards sunken to form a second sunken part, and the right machine shell can be connected with the left machine shell into a whole; the rear shell is sleeved at the rear sides of the left shell and the right shell, and the shapes of the first concave part and the second concave part are matched with the inner outline of the rear shell; and the damping ring is sleeved at the front end of the gearbox, and the edges of the damping ring are used for fixing the front ends of the right shell and the left shell. The mode that left casing and right casing are banded to the ring of using damping and back casing has reduced required bolt quantity and the through-hole quantity of seting up when left casing and right casing are connected, link when having reduced the manufacturing has also reduced fastening bolt's required time during the assembly to improve the production efficiency of manufacturing the product.

Description

Hand-held electric tool

Technical Field

The utility model relates to an electric tool technical field refers in particular to a hand-held type electric tool.

Background

The handheld electric tool is widely used by practitioners in industries such as construction and machinery due to the small size, portability and extremely high working efficiency. The common electric tool is usually assembled by connecting and fixing the housings on the left and right sides outside the motor and the gearbox. With the increasing social material level, electric tools are not only popular among the hands of various workers, but also start to step into many families, thereby having higher requirements on the aesthetic appearance of the electric tools and the comfort when users use the electric tools.

The prior technical scheme has the following defects:

1. the existing electric tool generally adopts the mode of directly connecting and fixing the machine shells on two sides, the connection mode generally adopts the screw connection, in order to screw the machine shells on two sides into a whole, holes need to be drilled on the machine shell on one side, and the drilled holes are not attractive, so that the integral aesthetic feeling of the electric tool is influenced.

2. The motor and the gearbox are limited in the shell in the existing electric tool is generally simple, when the electric tool is started, the generator and the gearbox vibrate, and the motor bearing abrasion can be accelerated by the vibration, so that the normal service life is greatly shortened, and meanwhile, the motor vibration can also enable the winding to slide downwards in an insulating mode. The vibration causes the motor end binding wire to be loosened, so that the end windings have the problems of mutual abrasion, reduction of insulation resistance, shortening of insulation service life and the like, and insulation breakdown can be caused in severe cases. In addition, the vibration of the motor can cause the damage of the dragged machine, the normal work of surrounding equipment is influenced, and the noise is large.

3. The scene of using electric tool is dark very often, and according to the difference of work kind and progress, the operator can put down electric tool, and under the dim scene, it is difficult to find electric tool sometimes to rely on the vision alone, also leads to the operator to be accidentally injured by electric tool easily.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a stable in structure, be convenient for make and assemble the hand-held type electric tool that the day appearance is pleasing to the eye, reducible motor vibration and be convenient for look for under dim condition.

The utility model aims at realizing the following steps:

a hand-held electric tool comprises a machine shell, wherein a motor, a gearbox and a battery assembly are arranged in the machine shell, and the gearbox is arranged at the front end of the motor;

the housing includes:

the outer wall of the rear part of the left machine shell is inwards sunken to form a first sunken part;

the outer wall of the rear part of the right machine shell is inwards sunken to form a second sunken part, and the right machine shell can be connected with the left machine shell into a whole;

the rear shell is sleeved at the rear sides of the left shell and the right shell, and the shapes of the first sunken part and the second sunken part are matched with the inner outline of the rear shell;

and the damping ring is sleeved at the front end of the gearbox, and the edge of the damping ring is fixed at the front ends of the right casing and the left casing.

Preferably, the terminal surface of damping ring is provided with the ring channel, left side casing front end shaping has chimb one, right side casing front end shaping has chimb two, chimb one with chimb two can the activity joint be in the ring channel.

Preferably, the damping ring is internally formed with a second limiting groove,

the outer wall of the front end of the gearbox is provided with a limiting bulge part which is used for being matched with the second limiting groove to carry out rotation limiting;

the outside of damping ring is provided with the stopper, right side casing with the shaping of left side casing have with the spacing groove one that the stopper matches.

Preferably, a plurality of sliding grooves IV and clamping holes II are formed in the first recessed part and the second recessed part, the clamping holes II and the sliding grooves IV are located on the same straight line, and an inclined plane II is formed at the tail end of the sliding grooves IV;

the rear shell is provided with a plurality of third buckles, and the third buckles are clamped into the second clamping holes after passing through the fourth sliding grooves;

preferably, a plurality of first buckles are arranged in the left shell;

a plurality of first clamping grooves corresponding to the first clamping buckles are formed in the right shell;

a plurality of second buckles are arranged in the left machine shell and the right machine shell;

a plurality of second clamping grooves corresponding to the second clamping buckles are formed in the rear shell;

positioning grooves are formed in the left machine shell and the right machine shell, positioning blocks are arranged on the rear machine shell, and the positioning blocks are matched with the positioning grooves;

be provided with the clamping part on the back casing, left side casing with right side casing shaping has chimb four, chimb four can be put into in the clamping part.

Preferably, the left casing and the right casing are both provided with a supporting frame,

the bearing frame is provided with a plurality of grooves,

the front end of the gearbox is provided with a first positioning part; the first positioning part abuts against the first step part;

the middle of the motor protrudes, step parts II are formed on two sides of the protrusion, and the positioning parts II abut against the step parts II;

and the third positioning part is provided with a third through hole in a forming mode, the gearbox is provided with a fixing part, and the fixing part is arranged in the third through hole in a penetrating mode and clamped and fixed by the third positioning part.

Preferably, a chuck is connected to a front end of the motor, and the fixing portion is disposed on the chuck;

the chuck is clamped on the gearbox, a limiting groove III is formed in the gearbox, the fixing part extends out of the limiting groove III, and the fixing part abuts against the limiting groove III;

the chuck is provided with a second connecting hole which is aligned with the first connecting hole on the motor, so that the motor and the chuck can be connected into a whole.

Compared with the prior art, the utility model outstanding and profitable technological effect is:

1. the utility model provides a mode that damping ring and back casing were encircleed is used respectively at electric tool's front and back both ends to required bolt quantity when having reduced left casing and right casing and connecting also reduces the quantity of the through-hole of seting up on the casing, the link of seting up the through-hole and the screw hole that corresponds when having reduced manufacturing. The time required for fastening the bolt is also reduced during assembly, so that the production efficiency of manufacturing the hand-held electric tool can be improved.

2. The utility model discloses only use a small amount of bolted connection left casing and right casing, back casing cover is in the rear side of left casing and right casing for wear to establish the bolt and the through-hole of seting up also can be covered by back casing, thereby in the outward appearance, make hand-held type electric tool level and more pleasing to the eye.

3. The utility model provides a motor and gearbox link into an integrated entity, are provided with a plurality of location portions in the casing about simultaneously, through the cooperation between location portion and the damping ring, can fix the position of motor and gearbox as far as, reduce the vibration of motor and gearbox to reduce the loss of part, prolong electric tool's life.

4. The volume of battery pack's lower volume is provided with the LED lamp, and it has the hole that the position corresponds to open simultaneously to sheathe in left casing, right casing and fixed for in dim space, electric tool's handle bottom can send the light, and convenient to use person looks for electric tool, also can confirm the position of electric tool handle simultaneously, avoids because the head or the switch that touch electric tool by mistake lead to the condition emergence that the operator is injured.

Drawings

Fig. 1 is a structural view of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

Figure 3 is a three-dimensional local part of the utility model

Fig. 4 is an exploded view of the present invention.

Fig. 5 is an enlarged view of a in fig. 3.

Fig. 6 is a schematic diagram of the connection between the left housing and the right housing of the present invention.

Fig. 7 is an enlarged view of B in fig. 3.

Fig. 8 is an enlarged view of C in fig. 4.

Fig. 9 is an enlarged view of D in fig. 3.

Fig. 10 is a block diagram of the damping ring, gearbox and motor of the present invention.

Fig. 11 is an exploded view of embodiment 2 of the present invention.

Fig. 12 is a schematic connection diagram of embodiment 2 of the present invention.

Fig. 13 is a structural view of the fixed sleeve of the present invention after connection.

Reference numerals are as follows: 1-a left housing; 11-convex edge one; 12-gap one; 13-a first recess; 14-convex edge three; 15-blind hole one of screw; 16-buckling one; 17-buckle two; 18-chute III; 181-bevel one; 19-clamping the first hole;

2-right casing; 21-convex edge two; 22-notch two; 23-a second recess; 24-groove one; 25-a first through hole; 26-a first clamping groove; 27-chute four; 271-inclined plane two; 28-clamp hole two;

3-a rear shell; 31-card slot two; 32-a positioning block; 33-positioning the groove; 34-convex edge four; 35-a clamping portion; 36-rear end cap; 37-blind screw holes II; 38-fastener III; 39-a fixture block; 391-positioning grooves;

4-fixing the sleeve; 41-positioning boss; 411-boss one; 412-lobe two; 42-fastener four; 43-buckling inclined top; 431-chute one; 432-chute two; 44-depressed part three; 45-light hole; 46-a battery eject button;

5-a damping ring; 51-an annular groove; 52-a second limiting groove; 53-through hole two; 54-a limiting block; 55-a first limit groove; 56-a vent hole;

6-a support frame; 61-positioning part one; 62-positioning part two; 63-positioning part three; 64-through hole three; 65-bearing curved surface;

7-a gearbox; 71-step one; 72-a limit boss; 73-a chuck; 74-a fixed part; 75-a third limiting groove; 76-fastener five; 77-chute five; 78-fixing hole; 79-connecting hole II;

8-an electric motor; 81-connecting hole one; 82-step two; 83-step three; 84-position part four;

9-a battery assembly; 91-LED lamps; 92-a light-transmitting plate;

10-machine shell.

Detailed Description

The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

The first embodiment is as follows:

the front-back-left-right positional relationship described herein is based on the positional relationship of the components of the power tool with respect to the user when the user holds the power tool and lifts the power tool.

The hand-held electric tool shown in fig. 1-4 comprises a housing 10, wherein an electric motor 8, a gearbox 7 and a battery pack 9 are installed in the housing 10, the gearbox 7 is arranged at the front end of the electric motor 8, the gearbox 7 and the electric motor 8 are positioned on the same axis, the gearbox 7 is connected with the electric motor 8 and a head of the electric tool, and the gearbox 7 can change the rotating speed output by a motor shaft of the electric motor 8, so that the rotating speed of the head of the electric tool can be adjusted.

The casing 10 includes:

the rear side of the left machine shell 1 is inwards sunken to form a first sunken part 13;

the rear side of the right casing 2 is inwards sunken to form a second sunken part 23, the right casing 2 can be connected with the left casing 1 to form a casing 10, the motor 8, the gearbox 7 and the battery pack 9 are arranged inside the integrally connected casing 10 and limited inside the integrally connected left casing 1 and right casing 2, so that the motor 8, the gearbox 7 and the battery pack 9 cannot be easily separated from the left casing 1 and the right casing 2. Wherein the gear box 7 and the motor 8 are disposed at an upper side of a case formed by connecting the left housing 1 and the right housing 2, the battery assembly 9 is disposed in a handle of the case formed by connecting the left housing 1 and the right housing 2, and the battery assembly 9 can be removed from a lower end of the handle.

And the rear shell 3 is sleeved at the rear sides of the left shell 1 and the right shell 2, and the shapes of the first concave part 13 and the second concave part 23 are matched with the outline of the rear shell 3, so that the rear shell 3 can be sleeved at the rear sides of the left shell 1 and the right shell 2 which are connected into a whole.

The damping ring 5 is sleeved at the front end of the gearbox 7, the damping ring 5 is fixed at the front ends of the right casing 2 and the left casing 1, the damping ring 5 can hoop the front ends of the left casing 1 and the right casing 2 which are connected into a whole, and meanwhile, the damping ring 5 is also connected with the shell of the gearbox 7, so that a relatively static state is formed among the left casing 1, the right casing 2 and the gearbox 7. When motor 8 starts, the gear in gearbox 7 also can rotate thereupon to can produce the vibration, and the state that keeps relative static between left casing 1, right casing 2 and the gearbox 7 can effectually reduce the collision between left casing 1, right casing 2 and the gearbox 7, reduces and takes place unnecessary loss owing to colliding with between the subassembly, thereby extension hand-held type electric tool's life.

Referring to fig. 2 to 5, an annular groove 51 is formed in an end surface of the damping ring 5, a first convex edge 11 is formed at a front end of the left housing 1, a second convex edge 21 is formed at a front end of the right housing 2, and the first convex edge 11 and the second convex edge 21 can be movably clamped in the annular groove 51.

And an annular groove 51 provided inside the damping ring 5 toward the left housing 1, the right housing 2 and the transmission case 7. The front end of the left casing 1 is formed with a convex edge one 11, the front end of the right casing 2 is formed with a convex edge two 21, the convex edge one 11 and the convex edge two 21 can be placed in the annular groove 51, and the convex edge one 11 and the convex edge two 21 abut against the inner wall of the annular groove 51.

Spaces matched with the edge contour of the damping ring 5 are formed between the convex edge I11 and the left machine shell 1 and between the convex edge II 21 and the right machine shell 2, so that the edge of the damping ring 5 is clamped by the left machine shell 1 and the right machine shell 2 to form fixation.

Due to the annular structure of the damping ring 5, the first flange 11 and the second flange 21 can generate opposite acting forces on the damping ring 5 in multiple directions, so that the damping ring 5 can be well limited in space movement. When the gearbox 7 vibrates, the damping ring 5 is also driven to vibrate, and at the moment, the annular groove 51 has a movement tendency of separating from one of the convex edges one 11 or the convex edges two 21, but the movement tendency is blocked by the other one of the convex edges one 11 or the convex edges two 21, so that a relative static movement state is kept among the left casing 1, the right casing 2 and the gearbox 7.

As shown in fig. 2 to 5, a second limiting groove 52 is formed inside the damping ring 5, and a second limiting protrusion 72 for cooperating with the second limiting groove 52 to limit rotation is provided on the outer wall of the front end of the transmission case 7.

The second limiting groove 52 and the gearbox 7 are provided with a plurality of limiting protrusions 72, and the number and the outline of the second limiting groove 52 are matched with the limiting protrusions 72, so that when the gearbox 7 is connected with the damping ring 5, the limiting protrusions 72 can be placed into the second limiting groove 52 in a one-to-one correspondence mode. Because the limiting convex part 72 is arranged on the power output shaft of the gearbox 7, the power output shaft of the gearbox 7 is not in a cylindrical shape any more, and when the limiting convex part 72 is placed in the second limiting groove 52 and is tightly meshed with the second limiting groove 52, the gearbox 7 and the motor 8 can be effectively prevented from rotating due to vibration.

And a second through hole 53 which is coaxial with the limiting boss 72 is formed in the second limiting groove 52, and the damping ring 5 and the gearbox 7 can be connected through a bolt through the second through hole 53, so that the connection between the damping ring 5 and the gearbox 7 is firmer.

The outer side of the damping ring 5 is provided with a limiting block 54, and the right casing 2 and the left casing 1 are formed with a limiting groove I55 matched with the limiting block 54.

And the limiting block 54 is arranged on the outer side of the damping ring 5, and a limiting groove I55 matched with the limiting block 54 is formed in the right casing 2 and the left casing 1, so that the limiting block 54 can be placed in the limiting groove I55 on the left casing 1 or the right casing 2. So that when the ring groove 51 is used to hoop the left casing 1 and the right casing 2, the limiting block 55 on the damping ring 5 also clamps the left casing 1 and the right casing 2, thereby further limiting the position between the left casing 1 and the right casing 2, and thus the connection between the left casing 1 and the right casing 2 is more tightly fastened.

As shown in fig. 2-8, the edge of the left housing 1 is provided with a plurality of flanges three 14. The inner side of the left casing 1 is also provided with a plurality of first screw blind holes 15. The number of the first screw blind holes 15 is three, and all the first screw blind holes 15 are located inside the first recess 13.

The edge of the right casing 2 is formed with a plurality of grooves 24, the positions and shapes of the grooves 24 correspond to the raised edge three 14, and when the left casing 1 is connected with the right casing 2, the raised edge three 14 and the grooves 24 are aligned with each other, and then the left casing 1 can be connected with the right casing 2 in an aligned manner. The raised edge three 14 and the groove one 24 not only play a role in determining the relative position between the left casing 1 and the right casing 2, but also can limit the relative displacement between the left casing 1 and the right casing 2 due to the engagement between the raised edge three 14 and the groove one 24, so that the connection between the left casing 1 and the right casing 2 can be more accurate.

In another alternative embodiment, an interference fit may be adopted between the raised edge three 14 and the groove one 24, and the friction force generated between the raised edge three 14 and the groove one 24 reinforces the connection between the left casing 1 and the right casing 2.

The right machine shell 2 is further provided with a first through hole 25, the first through hole 25 is aligned to the first screw blind hole 15, and a bolt can be connected with the first screw blind hole 15 after penetrating through the first through hole 25, so that the left machine shell 1 and the right machine shell 2 can be fastened secondarily by the bolt.

The first through hole 25 is located in the area of the second depressed part 23, the first left casing 1 and the second right casing 2 are connected into a whole, the bolt is adopted to reinforce the space between the first left casing 1 and the second right casing 2 for the second time, the rear casing 3 is connected with the first left casing 1 and the second right casing 2 at the moment, and the second depressed part 23 where the first through hole 25 is located can be shielded by the rear casing 3, so that the first through hole 25 cannot be directly observed in appearance, and the whole shell of the handheld electric tool is kept smooth and attractive.

A plurality of sliding grooves III 18 and clamping holes I19 are formed in the first sunken part 13, the clamping holes I19 and the sliding grooves III 18 are located on the same straight line, and inclined planes I181 are formed at the tail ends of the sliding grooves III 18;

the second concave part 23 is also provided with a plurality of sliding grooves IV 27 and clamping holes II 28, the clamping holes II 28 and the sliding grooves IV 27 are positioned on the same straight line, and the tail ends of the sliding grooves IV 27 are provided with inclined planes II 271;

the rear housing 3 is provided with a plurality of buckles three 38, the shape of the buckles three 38 is matched with the slide grooves three 18 and the slide grooves four 27, and the buckles three 38 can move along the slide grooves three 18 and the slide grooves four 27, and when the buckles three 38 move to the tail end of the slide grooves three 18 or the slide grooves four 27, the buckles three 38 can be pushed by the inclined surfaces one 181 or the inclined surfaces two 271, so that the buckles three 38 are placed into the clamping holes one 19 or the clamping holes two 28, and the rear housing 3 is clamped with the left housing 1 and the right housing 2.

The front end of the left casing 1 is provided with a first notch 12, the front end of the right casing 2 is provided with a second notch 22, and after the left casing 1 and the right casing 2 are connected, the first notch 12 can be aligned with the second notch 22. The first notch 12 and the second notch 22 can form a hollow groove matched with the outline of the limit block 54 after being aligned, when the limit block 54 on the damping ring 5 is placed into the hollow groove formed between the first notch 12 and the second notch 22, a locking effect can be formed on the left casing 1 and the right casing 2, and the left casing 1 and the right casing 2 are limited to move in the longitudinal direction, so that the left casing 1 and the right casing 2 are ensured not to move longitudinally relative to each other.

As shown in fig. 3-6, in the present embodiment, a total of four fasteners one 16 are provided in the left housing 1;

four first clamping grooves 26 corresponding to the first clamping buckles 16 are formed in the right shell 2, and when the left shell 1 is aligned with the right shell 2, the first clamping buckles 16 arranged on the left shell 1 can be accurately matched and meshed with the first clamping grooves 26, so that clamping connection is formed between the left shell 1 and the right shell 2.

Left side casing 1 and right casing 2's front end, rear end and lower extreme use damping ring 5 respectively, rear casing 3 hoops tightly with fixed cover 4, buckle 16 sets up between damping ring 5 and rear casing 3, between damping ring 5 and fixed cover 4 and on the position between rear casing 3 and fixed cover 4, thereby all there is firm tie point to keep the connection between left casing 1 and the right casing 2 on the edge that makes left casing 1 and right casing 2 connect, thereby make the weak position of connection that does not exist between left casing 1 and the right casing 2, make the connection between left casing 1 and the right casing 2 more stable, can provide better structural strength simultaneously, be difficult for taking place to receive the impact of external force and lead to the condition of left casing 1 and the separation of right casing 2.

In this embodiment, respectively be provided with two 17 of individual buckle in left casing 1 and the right casing 2, be provided with two 31 of draw-in groove that correspond two 17 of buckle in the back casing 3, after left casing 1 and right casing 2 accomplish to be connected, the lower extreme of back casing 3 passes through two 17 of buckle and two 31 joint of draw-in groove.

Positioning grooves 33 are formed in the left casing 1 and the right casing 2, positioning blocks 32 are arranged on the rear casing 3, the positioning blocks 32 are matched with the positioning grooves 33, and when the positioning blocks 32 are placed in the positioning grooves 33 and meshed with the positioning grooves 33, the lower end of the rear casing 3 is clamped with the left casing 1 and the right casing 2.

The positioning block 32 and the positioning groove 33 can also limit the longitudinal movement tendency of the rear housing 3 relative to the left housing 1 and the right housing 2.

The rear housing 3 is provided with a clamping part 35, the left housing 1 and the right housing 2 are formed with a convex edge four 34, and the convex edge four 34 can be placed in the clamping part 35. The clamping portion 35 and the four-convex-edge 34 can play a role in positioning, so that the alignment between the rear housing 3 and the left housing 1 and the right housing 2 is convenient, and the same movement tendency is kept between the clamping portion 35 and the four-convex-edge 34 in the horizontal direction.

The left casing 1, the right casing 2 and the rear casing 3 can be kept in a relatively static state through the mutual engagement of the positioning block 32 and the positioning groove 33 and the mutual clamping of the clamping part 35 and the four convex edges 34, so that the left casing 1, the right casing 2 and the rear casing 3 are connected into a whole.

A locking block 39 is formed on the edge of the rear housing 3, the contour of the locking block 39 matches with the positioning groove 391, and the positioning of the locking block 39 and the positioning groove 391 facilitates the alignment between the rear housing 3 and the left and right housings 1 and 2, thereby facilitating the process of assembling the rear housing 3 to the left and right housings 1 and 2.

As shown in fig. 2 to 11, a plurality of support brackets 6 are provided in the left housing 1 and the right housing 2, the support brackets 6 are used for limiting the positions of the motor 8 and the transmission case 7, and the shape of the surface of one side of the support brackets 6 contacting the motor 8 and the transmission case 7 is matched with the contours of the motor 8 and the transmission case 7, so that the support brackets 6 can support the motor 8 and the transmission case 7 and keep the head of the electric tool, the motor 8 and the transmission case 7 on the same straight line.

The head of the electric tool, the motor 8 and the gearbox 7 are kept on the same straight line, so that the operation of a user is facilitated, the experience of the user is improved, and meanwhile the positions of the motor 8 and the gearbox 7 are more conveniently fixed. The support part 6 surrounding the outer sides of the gearbox 7 and the motor 8 can also move through a space for limiting the movement of the gearbox 7 and the motor 8, and reduce the vibration generated by the gearbox 7 and the motor 8.

As shown in fig. 2 to 11, the support frame 6 is formed with,

the first positioning portion 61 and the first step portion 71 are formed at the front end of the gearbox 7, the first positioning portion 61 abuts against the first step portion 71, it is noted that the surface, facing the gearbox 7, of the first positioning portion 61 still plays a role in supporting the gearbox 7, and therefore the surface, facing the gearbox 7, of the first positioning portion 61 is arc-shaped and matched with the profile of the gearbox 7. Meanwhile, the surface of the first positioning portion 61 facing the rear side of the electric tool in the transverse direction abuts against the first stepped portion 71, thereby functioning to restrict the movement of the transmission case 7.

Positioning portion two 62 and motor 8 protrude from the middle, step two 82 and step three 83 are formed on two sides of the protrusion, positioning portion two 62 abuts against step two 82, it should be noted that the surface of positioning portion two 62 facing to motor 8 also plays a role in supporting motor 8, and therefore the surface of positioning portion two 62 facing to motor 8 is in an arc shape matching the contour of motor 8. And the surface of the second positioning portion 62 facing the front side of the power tool in the lateral direction abuts against the second stepped portion 82.

Through the cooperation of the first positioning part 61 and the second positioning part 62, the gearbox 7 and the motor 8 can be limited in one area, the moving space of the gearbox 7 and the motor 8 is reduced as much as possible, the supporting part 6 can be closer to the surfaces of the gearbox 7 and the motor 8, the gearbox 7 and the motor 8 are fixed, and the vibration possibly generated by the gearbox 7 and the motor 8 is reduced. Meanwhile, a supporting curved surface 65 matched with the contour of the motor 8 is formed between the first positioning part 61 and the second positioning part 62, the supporting curved surface 65 is arranged at the lower end of the motor 8, the supporting curved surface 65 matched with the contour of the motor 8 can better provide supporting force for the motor 8, and meanwhile, the contact area between the supporting curved surface 65 and the motor 8 can be increased due to the curved surface structure, so that the vibration generated by the motor 8 can be better limited while better supporting force is provided.

The surfaces of the positioning part III 63, which face the gearbox 7 and the motor 8, of the positioning part III are respectively attached to the gearbox 7 or the motor 8, wherein one side corresponding to the gearbox 7 is attached to the bottom end of the gearbox 7, and one side corresponding to the motor 8 is close to the step part III 83, and through the matching of the positioning part II 62 and the positioning part III 63, the moving space of the motor 8 can be limited, and the vibration generated by the motor 8 is further reduced.

A third through hole 64 is formed in the third positioning portion 63, a fixing portion 74 is arranged on the gearbox 7, and the fixing portion 74 penetrates through the third through hole 64.

Obviously, three positioning portions 63 are respectively disposed on the inner sides of the left casing 1 and the right casing 2, so that the transmission case 7 can be first placed into the left casing 1 or the right casing 2, and then connected to the other casing, and at this time, the fixing portion 74 can be inserted into the three through holes 64 and clamped and fixed by the three positioning portions 63.

And through the cooperation of location portion one 61 and location portion three 63, can restrict the space of the activity of gearbox 7, further reduce the vibration that gearbox 7 probably produced.

As shown in fig. 2 and 11, a positioning portion four 84 is further formed in the left casing 1 and the right casing 2, and the positioning portion four 84 directly abuts against the rear end of the motor 8, so that the positioning portion four 84 can provide a reaction force for the motor 8, and the positioning portion four 84 can better fix the position of the motor 8. The fourth positioning portion 84 is used as a main component for applying a reaction force to the motor 8, bears most of the force generated when the motor 8 vibrates, and can reduce the mutual acting force generated between the second step portion 82 and the second positioning portion 62, so that the component is better protected, and the service life of the component is prolonged.

The second embodiment:

as shown in fig. 11-13, the difference between the present embodiment and the first embodiment is that a fixing sleeve 4 is formed at the bottom end of the rear housing 3, and the fixing sleeve 4 is sleeved at the lower ends of the left housing 1 and the right housing 2.

After left casing 1 and right casing 2 link into an integrated entity, the lower extreme of left casing 1 and right casing 2 that link into an integrated entity can be waled to fixed cover 4 to make the connection between left casing 1 and the right casing 2 more firm, when can avoid the assembly simultaneously, need aim at the lower extreme of back casing 3 and casing 10 completely just can be connected back casing 3 with casing 10. And then

The fixing cover 4 is further provided with a battery eject button 46 so that the battery assembly 9 can be fixed in a handle formed after the left and right housings 1 and 2 are coupled, and the state of the battery assembly 9 can be controlled by the battery eject button 46.

The lower end of the left housing 1 is extended and formed with a first protrusion 411, and the lower end of the right housing 2 is extended and formed with a second protrusion 412.

The upper end of the fixing sleeve 4 is formed with a positioning convex part 41, and the outline of the positioning convex part 41 is matched with the outlines of the first convex part 411 and the second convex part 412, so that the fixing sleeve is accurately connected with the left casing 1 and the right casing 2. When the user uses the handheld electric tool, the first protruding portion 411 and the second protruding portion 412 are more smooth than flat surfaces, so that not only can friction be provided as support, but also the first protruding portion 411 and the second protruding portion 412 can generate reaction force to prevent the handheld electric tool from falling off from the hand of the user, and casualties and property loss are avoided.

The first bulge part 411, the second bulge part 412 and the fixing sleeve 4 enable the bottom end of the handle of the hand-held electric tool to form a bulge part, when a user holds the electric tool, the lower part of a palm can abut against the inclined plane of the bulge part, so that reaction force is generated between the first bulge part 411, the second bulge part 412 and the palm of the user, the user can be assisted to hold the electric tool better, the electric tool is prevented from falling off from the hand of the user, the user cannot feel monotonous in appearance, and the hand-held electric tool is more attractive compared with a handle with a flat surface.

The lower end of the left casing 1 is further formed with a first sliding groove 431, the lower end of the right casing 2 is further formed with a second sliding groove 432, a fastener inclined top 43 is formed in the first sliding groove 431 and the second sliding groove 432, a fastener fourth 42 is formed on the fixing sleeve 4, and the position of the fastener fourth 42 corresponds to the first sliding groove 431 and the second sliding groove 432.

When the snap four 42 is aligned with the first sliding groove 431 and the second sliding groove 432, the fixing sleeve 4 can be sleeved on the outer sides of the left casing 1 and the right casing 2, and when the snap four 42 moves to the tail end of the first sliding groove 431 and the second sliding groove 432, the snap inclined top 43 can be contacted with the snap four 42, and the snap four 42 is jacked up to enable the snap four 42 to be placed above the snap inclined top 43. And because the upper surface of the buckle lifter 43 is a plane, the lower surface of the buckle four 42 is also a plane, after the buckle four 42 is placed above the buckle lifter 43, longitudinal interaction force can only be generated between the buckle four 42 and the buckle lifter 43, the fixing sleeve 4 cannot be pushed to deform, the buckle four 42 cannot be separated from the upper part of the buckle lifter 43, and the left casing 1, the right casing 2 and the fixing sleeve 4 are fixed.

As shown in fig. 11-13, the bottom ends of the left housing 1 and the right housing 2 are formed with three recessed portions 44, and the fixing sleeve 4 is formed with a light-transmitting hole 45 at a position corresponding to the three recessed portions 44.

The bottom of battery pack 9 is provided with LED lamp 91 and light-passing board 92, and the position of light-passing board 92 corresponds the position of light-passing hole 45 to make LED lamp 91's light can see through light-passing board 92 and pass light-passing hole 45, thereby be convenient for in dim scene, the quilt is observed with the naked eye.

Set up light-emitting component on hand-held type electric tool, can effectively avoid because the user is in dim scene, because can't in time find hand-held type electric tool and work is delayed. In a dim scene, the accident of casualties and property loss caused by sudden starting of the handheld electric tool is more likely to occur due to the fact that a user cannot confirm the position of the handheld electric tool and the accident of mistaken collision occurs.

And set up the above problem of light-emitting component can effectual improvement, set up light-emitting component on handheld portion, more can let the user find handheld electric tool's position fast in time, can in time confirm handheld electric tool's safe position to can protect user's personal safety.

Example three:

as shown in fig. 2, 9 and 10, a chuck 73 is provided at the front end of the motor 8, and a fixing portion 74 is provided on the chuck 73. The chuck 73 is formed with a fifth snap 76, the inner side of the gear box 7 is provided with a fifth slide groove 77, and the tail end of the fifth slide groove 77 is provided with a fixing hole 78 in parallel. After the five buckles 76 move to the tail end of the five sliding grooves 77, the chuck 73 is rotated, the five buckles 76 can enter the fixing holes 78, and therefore the chuck 73 is clamped on the gearbox 7.

The gearbox 7 is formed with a third limit groove 75, and the width of the third limit groove 75 is equal to the width of the fifth slide groove 77 plus the width of the fixing hole 78, so that the third limit groove 75 does not influence the assembly speed in the process of clamping the chuck 73 to the gearbox 7.

Meanwhile, the fixing portion 74 protrudes from the third limiting groove 75, and one side surface of the fixing portion 74 abuts against the inner wall of the third limiting groove 75. The chuck 73 is provided with a second connecting hole 79, the second connecting hole 79 is aligned with a first connecting hole 81 on the motor 8, and the motor 8 and the chuck 73 can be integrally connected by means of pins or bolts.

Since one side surface of the fixing portion 74 abuts against the inner wall of the third limiting groove 75, when the motor 8 rotates due to vibration, the chuck 73 rotates together with the motor 8 and drives the transmission case 7 to rotate at the same speed, so that the transmission case 7 and the motor 8 are kept relatively stationary. So that no relative displacement between the gearbox 7 and the motor 8 occurs, which could affect the effect of the mechanical transmission or cause loss of components.

Example four:

as shown in fig. 2 and 12, the present embodiment is substantially the same as the first embodiment or the second embodiment, except that the upper portions of the left casing 1 and the right casing 2 are provided with second screw blind holes 37, and the rear casing 3 can be connected with the left casing 1 and the right casing 2 through bolts, so that the links among the left casing 1, the right casing 2 and the rear casing 3 are more stable.

In order to facilitate the screwing of the rear casing 3 with the left casing 1 and the right casing 2, the rear end of the rear casing 3 is provided with a hole, a rear end cover 36 is arranged at the hole, and the rear end cover 36 is clamped on the rear casing 3. When the rear case 3 is screwed with the left case 1 and the right case 2, the position of the second screw blind hole 37 can be clearly seen only by taking down the rear end cover 36, and the screwing work is completed.

The above embodiment is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited in this way, so: all equivalent changes made according to the structure, shape and principle of the utility model should be covered within the protection scope of the utility model.

Claims (7)

1. A hand-held electric tool comprises a machine shell (10), wherein a motor (8), a gearbox (7) and a battery component (9) are installed in the machine shell (10), and the gearbox (7) is arranged at the front end of the motor (8);

characterized in that the housing (10) comprises:

the outer wall of the rear part of the left machine shell (1) is inwards sunken to form a first sunken part (13);

the outer wall of the rear part of the right shell (2) is inwards sunken to form a second sunken part (23), and the right shell (2) can be connected with the left shell (1) into a whole;

the rear shell (3) is sleeved at the rear sides of the left shell (1) and the right shell (2), and the shapes of the first concave part (13) and the second concave part (23) are matched with the inner contour of the rear shell (3);

and the damping ring (5) is sleeved at the front end of the gearbox (7), and the edge of the damping ring (5) is fixed at the front ends of the right casing (2) and the left casing (1).

2. The hand-held electric tool as claimed in claim 1, wherein the end face of the vibration damping ring (5) is provided with an annular groove (51), the front end of the left housing (1) is formed with a first flange (11), the front end of the right housing (2) is formed with a second flange (21), and the first flange (11) and the second flange (21) can be movably clamped in the annular groove (51).

3. A hand held power tool according to claim 2, wherein the damping ring (5) is formed with a second limiting groove (52) on the inside,

the outer wall of the front end of the gearbox (7) is provided with a limiting boss (72) which is used for being matched with the second limiting groove (52) to carry out rotation limiting;

the outer side of the damping ring (5) is provided with a limiting block (54), and a first limiting groove (55) matched with the limiting block (54) is formed in the right casing (2) and the left casing (1).

4. A hand held power tool according to claim 1 or 3,

a plurality of sliding grooves IV (27) and clamping holes II (28) are formed in the first recessed portion (13) and the second recessed portion (23), the clamping holes II (28) and the sliding grooves IV (27) are located on the same straight line, and the tail ends of the sliding grooves IV (27) are provided with inclined planes II (271);

the rear shell (3) is provided with a plurality of third buckles (38), and the third buckles (38) are clamped into the second buckle holes (28) after passing through the fourth sliding groove (27).

5. A hand held power tool according to claim 4, wherein a plurality of snap-in units (16) are provided in the left housing (1);

a plurality of first clamping grooves (26) corresponding to the first clamping buckles (16) are formed in the right shell (2);

a plurality of second buckles (17) are arranged in the left shell (1) and the right shell (2);

a plurality of second clamping grooves (31) corresponding to the second clamping buckles (17) are formed in the rear shell (3);

positioning grooves (33) are formed in the left casing (1) and the right casing (2), positioning blocks (32) are arranged on the rear casing (3), and the positioning blocks (32) are matched with the positioning grooves (33);

be provided with clamping part (35) on back casing (3), left side casing (1) with right side casing (2) shaping has chimb four (34), chimb four (34) can be put into in clamping part (35).

6. A hand held power tool according to claim 1 or 5, wherein a support frame (6) is arranged in each of the left housing (1) and the right housing (2),

the supporting frame (6) is formed with a plurality of supporting rods,

the positioning part I (61), and a step part I (71) is formed at the front end of the gearbox (7); the first positioning part (61) abuts against the first step part (71);

a second positioning part (62), wherein the middle of the motor (8) protrudes, two stepped parts (82) are formed on two sides of the protrusion, and the second positioning part (62) abuts against the second stepped parts (82);

and the third positioning part (63) is provided with a third through hole (64), the gearbox (7) is provided with a fixing part (74), and the fixing part (74) is arranged in the third through hole (64) in a penetrating manner and is clamped and fixed by the third positioning part (63).

7. The hand-held power tool according to claim 6, wherein a chuck (73) is attached to a front end of the motor (8), and the fixing portion (74) is provided on the chuck (73);

the chuck (73) is clamped on the gearbox (7), a third limiting groove (75) is formed in the gearbox (7), the fixing part (74) extends out of the third limiting groove (75), and the fixing part (74) abuts against the third limiting groove (75);

the chuck (73) is provided with a second connecting hole (79), and the second connecting hole (79) is aligned with a first connecting hole (81) on the motor (8), so that the motor (8) and the chuck (73) can be connected into a whole.

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