CN218283849U

CN218283849U - Impact structure of electric drill

Info

Publication number: CN218283849U
Application number: CN202222493303.4U
Authority: CN
Inventors: 黄永林; 李咸进; 王剑
Original assignee: Ningbo Tianming Tools Co ltd
Current assignee: Ningbo Tianming Tools Co ltd
Priority date: 2022-09-21
Filing date: 2022-09-21
Publication date: 2023-01-13
Anticipated expiration: 2032-09-21

Abstract

The invention discloses an impact structure of an electric drill, which comprises a gear box shell (1), a fixed ratchet wheel (2), a rotary ratchet wheel (3), a mode adjusting sleeve (4), a torque adjusting sleeve (5), an output shaft (6) and a spring (7); in the impact mode of the electric drill, the deflector rod (10) is positioned at one end of the long hole (1.1) and is separated from the end surface of the convex strip (8.1). The impact structure of the electric drill is additionally provided with the positioning sleeve, so that the rotating ratchet wheel and the fixed ratchet wheel can be impacted by axially positioning between the positioning sleeve and the adjusting sleeve, the axial length size can be reduced without adjusting in the axial direction, and the durability can be improved without adopting a lug and groove structure.

Description

Impact structure of electric drill

Technical Field

The utility model relates to an electric tool technical field specifically says an impact structure of electric drill.

Background

There is an electric drill at present, possesses multiple mode: a screwed state, a drilling mode and an impact mode.

The prior art discloses an impact drill, and rotatory cover of assaulting can switch the function, and the rotatory cover of assaulting is detained all the time at gearbox casing front end on three gears and can not break away from. When the impact gear is impacted, a first protruding part on an impact support assembled on the impact output shaft corresponds to a second opening position on the impact rotating sleeve, the impact output shaft can move back and forth along the axial direction, after the front end of the impact output shaft is pressed, a rotating ratchet wheel on the impact output shaft can be contacted with a fixed ratchet wheel fixed on a small-diameter section, the rotating ratchet wheel can be separated from the fixed ratchet wheel under the action of a first elastic piece, namely an impact spiral spring, an impact function is generated in continuous contact and separation of the rotating ratchet wheel and the fixed ratchet wheel, and at the moment, the impact torque gasket is pressed by the impact rotating sleeve, so that the impact gear box has no tripping function. When drilling the shelves and screw shelves, strike first bellying top on the support and strike the terminal surface of rotatory cover, first bellying does not fall into the second opening, and rotatory ratchet can not contact with fixed ratchet this moment, strikes and bores and does not have the impact function. However, when the gear is drilled, the impact torsion gasket is pressed by the impact rotating sleeve, the impact gear box has no tripping function, and when the screw gear is drilled, the impact rotating sleeve does not press the impact torsion gasket, the impact torsion gasket is loosened and can jump back and forth, and the second elastic piece, namely the impact torsion helical spring, is used for adjusting the torsion.

The electric drill of the above structure has the following disadvantages: 1. the structure of the impact mode adopts that a first lug boss on an impact support assembled on an impact output shaft corresponds to a second opening position on an impact rotary sleeve, and the first lug boss is axially matched with the second opening position, so that the length of the head of the whole electric drill is increased, and the overall dimension of the whole electric drill is increased. 2. The outer surface of the small-diameter section is provided with a first groove in the axial direction, the inner surface of the small-diameter section is provided with a second groove in the axial direction, the circumferential outer surface of the fixed ratchet wheel is provided with a second bulge part in a forming mode, and the second bulge part is clamped in the second groove; the forming is provided with first lug on the circumference internal surface of impact torsion gasket, and the forming is provided with the second lug on the circumference internal surface of impact thread circle, and first lug and second lug all mutually support with first recess, and processing lug and recess process are complicated, and bellying, lug isotructure are limited to the restriction of size of a dimension and the impact force when switching moreover, and the durability is not enough, has cracked potential safety hazard.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide an increase position sleeve, make axial positioning come the real ratchet that makes between position sleeve and the adjusting collar and accomplish with fixed ratchet and strike, need not adjust at the axial, can reduce axial length size, and do not adopt lug and groove structure, can increase the impact structure of durable electric drill.

The technical scheme of the utility model is that an impact structure of electric drill is provided with following structure, including gear box casing, fixed ratchet, rotatory ratchet, mode adjusting sleeve, moment of torsion adjusting sleeve, output shaft and spring, the output shaft runs through in the gear box casing, fixed ratchet and rotatory ratchet cover are outside the output shaft and lie in the gear box casing; the method is characterized in that: the output shaft is provided with a positioning sleeve, the rotating ratchet wheel is positioned between the fixed ratchet wheel and the positioning sleeve, one end of the spring is abutted against the end face of the fixed ratchet wheel, and the other end of the spring is abutted against the end face of the positioning sleeve; be equipped with the impact adjustment cover in the gear box casing, the impact adjustment cover is just located between fixed ratchet and the rotatory ratchet outside the output shaft, the lateral wall of impact adjustment cover is equipped with the driving lever, the lateral wall of gear box casing is equipped with the slot hole, the driving lever passes the slot hole and outwards stretches out, the position sleeve be equipped with towards a plurality of sand grips of fixed ratchet, one of them sand grip corresponds with the slot hole, the driving lever lateral sliding is in the slot hole at the electric drill, is in drilling and screwdriver mode the driving lever just offsets with the terminal surface of sand grip when being located the one end of slot hole, at electric drill impact mode the driving lever is located the one end of slot hole and separates with the terminal surface of sand grip.

When the electric drill is in a drilling and screwdriver mode, the rotating ratchet wheel is separated from the fixed ratchet wheel, and when the electric drill is in an impact mode, the rotating ratchet wheel is abutted against the fixed ratchet wheel.

The outer wall of the impact adjusting sleeve is provided with positioning blocks, the number of the positioning blocks corresponds to that of the raised lines, the shifting rods are fixed with one of the positioning blocks, and the positioning blocks are uniformly distributed along the circumference.

The positioning block is staggered with the convex strip, and then the positioning sleeve pushes the rotary ratchet wheel to abut against the fixed ratchet wheel and can axially slide.

The top of the mode adjusting sleeve is provided with a notch, the outer end of the shifting rod is embedded into the notch, and the mode adjusting sleeve rotates circumferentially to drive the impact adjusting sleeve to rotate in the same direction.

After the structure more than adopting, the utility model has the advantages of it is following: because the position sleeve be equipped with towards a plurality of sand grips of fixed ratchet, one of them sand grip corresponds with the slot hole, the driving lever lateral sliding is in the slot hole, is in drilling and screwdriver mode at the electric drill the driving lever just offsets with the terminal surface of sand grip when being located the one end of slot hole, at electric drill impact mode the driving lever is located the one end of slot hole and separates with the terminal surface of sand grip. The impact adjusting sleeve is located between the fixed ratchet wheel and the rotating ratchet wheel and used for positioning the axial position of the rotating ratchet wheel, adjustment in the axial direction is not needed, the axial length size can be reduced, a lug and groove structure is not adopted, and durability can be improved.

As an improvement, when the electric drill is in a drilling and screwdriver mode, the rotating ratchet wheel is separated from the fixed ratchet wheel, and when the electric drill is in an impact mode, the rotating ratchet wheel is abutted against the fixed ratchet wheel, and the end face of the rotating ratchet wheel is abutted against the fixed ratchet wheel to provide an impact effect.

As an improvement, the outer wall of the impact adjusting sleeve is provided with positioning blocks, the number of the positioning blocks corresponds to that of the raised lines, the shifting rod is fixed with one of the positioning blocks, the positioning blocks are uniformly distributed along the circumference, and the shifting rod facilitates the mode impact adjusting sleeve to circumferentially drive the impact adjusting sleeve to circumferentially rotate.

As an improvement, the positioning block is staggered with the convex strip, then the positioning sleeve pushes the rotary ratchet wheel to abut against the fixed ratchet wheel and can axially slide, the positioning block abuts against the convex strip for positioning, and the dislocation can axially slide to realize the impact effect.

As an improvement, the top of the mode adjusting sleeve is provided with a notch, the outer end of the shifting rod is embedded into the notch, the mode adjusting sleeve rotates circumferentially to drive the impact adjusting sleeve to rotate in the same direction, and the mode adjusting sleeve is convenient to drive the impact adjusting sleeve to rotate in the same direction.

Drawings

Fig. 1 is an explosion schematic diagram of an impact structure of an electric drill of the present invention.

Fig. 2 is a schematic cross-sectional view of an impact structure of an electric drill according to the present invention.

Fig. 3 is the utility model discloses an electric drill's inside schematic diagram of impact structure.

Fig. 4 is the schematic diagram of the impact structure of the electric drill in the drilling and screwdriver modes.

Fig. 5 is a schematic diagram of an impact structure of an electric drill in an impact mode according to the present invention.

Shown in the figure:

1. the gear box comprises a gear box shell, 1.1 parts of long holes, 2 parts of fixed ratchets, 3 parts of rotating ratchets, 4 parts of mode adjusting sleeves, 4.1 parts of notches, 5 parts of torque adjusting sleeves, 6 parts of output shafts, 7 parts of springs, 8 parts of positioning sleeves, 8.1 parts of convex strips, 9 parts of impact adjusting sleeves, 9.1 parts of positioning blocks, 10 parts of shifting rods.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1-5, the utility model discloses an impact structure of electric drill, including gearbox casing 1, fixed ratchet 2, rotatory ratchet 3, mode adjusting collar 4, moment of torsion adjusting collar 5, output shaft 6 and spring 7, output shaft 6 runs through in the gearbox casing 1, fixed ratchet 2 and rotatory ratchet 3 cover just are located gearbox casing 1 outside output shaft 6.

The output shaft 6 is provided with a positioning sleeve 8, the rotating ratchet wheel 3 is positioned between the fixed ratchet wheel 2 and the positioning sleeve 8, one end of the spring 7 abuts against the end face of the fixed ratchet wheel 2, and the other end abuts against the end face of the positioning sleeve 8. The mode adjusting sleeve 4 is screwed with the gear box shell 1, so that the positioning sleeve 8 is abutted against the end face of the fixed ratchet 2 through the spring 7. And a bearing is arranged between the rotating ratchet wheel 3 and the positioning sleeve 8.

The gearbox shell 1 is internally provided with an impact adjusting sleeve 9, the impact adjusting sleeve 9 is sleeved outside the output shaft 6 and is positioned between the fixed ratchet 2 and the rotating ratchet 3, the side wall of the impact adjusting sleeve 9 is provided with a shift lever 10, the side wall of the gearbox shell 1 is provided with a long hole 1.1, the shift lever 10 penetrates through the long hole 1.1 and extends outwards, and the shift lever 10 swings to circumferentially rotate the impact adjusting sleeve 9.

The positioning sleeve 8 is provided with a plurality of convex strips 8.1 facing the fixed ratchet 2, one convex strip 8.1 corresponds to the long hole 1.1, and the shift lever 10 transversely slides in the long hole 1.1. The outer wall of the impact adjusting sleeve 9 is provided with positioning blocks 9.1, the number of the positioning blocks is corresponding to that of the convex strips 8.1, the deflector rod 10 is fixed with one of the positioning blocks 9.1, and the positioning blocks 9.1 are uniformly distributed along the circumference. The positioning block 9.1 is staggered with the convex strip 8.1, and then the positioning sleeve 8 pushes the rotary ratchet wheel 3 to abut against the fixed ratchet wheel 2 and can axially slide.

The top of the mode adjusting sleeve 4 is provided with a notch 4.1, the outer end of the deflector rod 10 is embedded in the notch 4.1, and the mode adjusting sleeve 4 rotates circumferentially to drive the impact adjusting sleeve 9 to rotate in the same direction.

As shown in fig. 4, when the electric drill is in the drilling and screwdriver mode, the shift lever 10 is located at one end of the elongated hole 1.1 and abuts against the end surface of the protruding strip 8.1, the rotating ratchet 3 is separated from the fixed ratchet 2, i.e. separated by the impact adjusting sleeve 9, and at this time, the positioning block 9.1 of the impact adjusting sleeve 9 corresponds to the protruding strip 8.1.

As shown in fig. 5, in the impact mode of the electric drill, the mode adjustment sleeve 4 is rotated, so that the shift lever 10 moves to one end of the long hole 1.1 and is separated from the end surface of the convex strip 8.1. At the moment, a positioning block 9.1 of the impact adjusting sleeve 9 is staggered with the convex strip 8.1, and the rotating ratchet wheel 3 is propped against the fixed ratchet wheel 2 under the action of the spring 7 and can axially move.

Claims

1. An impact structure of an electric drill comprises a gear box shell (1), a fixed ratchet wheel (2), a rotary ratchet wheel (3), a mode adjusting sleeve (4), a torque adjusting sleeve (5), an output shaft (6) and a spring (7), wherein the output shaft (6) penetrates through the gear box shell (1), and the fixed ratchet wheel (2) and the rotary ratchet wheel (3) are sleeved outside the output shaft (6) and are positioned in the gear box shell (1); the method is characterized in that: the output shaft (6) is provided with a positioning sleeve (8), the rotating ratchet wheel (3) is positioned between the fixed ratchet wheel (2) and the positioning sleeve (8), one end of the spring (7) is abutted against the end face of the fixed ratchet wheel (2), and the other end of the spring is abutted against the end face of the positioning sleeve (8); be equipped with impact adjusting sleeve (9) in gear box casing (1), impact adjusting sleeve (9) cover is just located between fixed ratchet (2) and rotatory ratchet (3) outside output shaft (6), the lateral wall of impact adjusting sleeve (9) is equipped with driving lever (10), the lateral wall of gear box casing (1) is equipped with slot hole (1.1), driving lever (10) pass slot hole (1.1) and outwards stretch out, a plurality of sand grips (8.1) of being equipped with towards fixed ratchet (2) of position sleeve (8), one of them sand grip (8.1) corresponds with slot hole (1.1), driving lever (10) lateral sliding is in slot hole (1.1), is in drilling and screwdriver mode at the electric drill driving lever (10) when being located the one end of slot hole (1.1) and offset with the terminal surface of sand grip (8.1), at electric drill impact mode driving lever (10) is located the one end of slot hole (1.1) and with the terminal surface separation of sand grip (8.1).

2. The impact structure of an electric drill according to claim 1, wherein: when the electric drill is in a drilling and screwdriver mode, the rotating ratchet wheel (3) is separated from the fixed ratchet wheel (2), and when the electric drill is in an impact mode, the rotating ratchet wheel (3) is abutted against the fixed ratchet wheel (2).

3. The impact structure of an electric drill according to claim 1, wherein: the outer wall of the impact adjusting sleeve (9) is provided with positioning blocks (9.1) the number of which corresponds to that of the raised lines (8.1), the shifting rod (10) is fixed with one of the positioning blocks (9.1), and the positioning blocks (9.1) are uniformly distributed along the circumference.

4. A power drill impact structure according to claim 3, wherein: the positioning block (9.1) and the convex strip (8.1) are staggered, and then the positioning sleeve (8) pushes the rotary ratchet (3) to abut against the fixed ratchet (2) and can axially slide.

5. A power drill impact structure according to claim 3, wherein: the top of the mode adjusting sleeve (4) is provided with a notch (4.1), the outer end of the deflector rod (10) is embedded into the notch (4.1), and the mode adjusting sleeve (4) rotates in the circumferential direction to drive the impact adjusting sleeve (9) to rotate in the same direction.