CN211039556U

CN211039556U - Torque adjusting mechanism of gear box and electric tool thereof

Info

Publication number: CN211039556U
Application number: CN201921128193.3U
Authority: CN
Inventors: 欧阳智
Original assignee: Zhejiang Minglei Tools Industry Co ltd
Current assignee: Zhejiang Minglei lithium energy technology Co., Ltd
Priority date: 2019-07-17
Filing date: 2019-07-17
Publication date: 2020-07-17
Anticipated expiration: 2029-07-17

Abstract

The utility model discloses a torque adjusting mechanism of a gear box and an electric tool thereof, which comprises a planetary gear box and an adjusting component; the adjusting component comprises a mounting seat, a moment gasket, an elastic pressing piece, a threaded sleeve and a torque cup; a ball pressing piece is arranged on the mounting seat, and a positioning block is convexly arranged on the end face of the gear disc facing the ball pressing piece; the periphery wall of the torque gasket is provided with a groove, and the inner wall of the torque cup is provided with axially distributed convex blocks which can tightly abut against the end face of the torque gasket or are positioned in the groove. The utility model has the advantages of it is following and effect: through the switching that different functions kept off is realized to the degree that compresses tightly of adjusting elasticity pressing part to the moment gasket, on the other hand directly carries on spacingly to the moment gasket through the lug that sets up on the moment of torsion cup, realizes strikeing the quick spacing that keeps off for need not to continue to rotate the moment of torsion cup again and compress tightly elasticity pressing part completely, make to strike and keep off the switching more laborsaving convenient.

Description

Torque adjusting mechanism of gear box and electric tool thereof

Technical Field

The utility model relates to a technical field, in particular to moment guiding mechanism of gear box and electric tool thereof.

Background

The electric tool is provided with a screw gear, an electric drill gear and an electric hammer gear, and various gear modes can meet different working requirements, so that the electric tool is widely applied to various industries at present. The electric tool has the operation principle that the gear system is utilized to transmit the power of the motor to the main shaft, and the main shaft can be matched with a proper clutch mechanism, so that the main shaft can provide a corresponding motion mode and output torque force to execute preset work.

The mode of operation of the power tool can be switched by rotating an adjusting ring arranged on the power tool. Generally, the adjusting ring displays torque value, screw gear symbol, electric drill gear symbol and electric hammer gear symbol. An operator needs to switch from a screw gear to an electric drill gear or an electric hammer gear, and the electric tool can be in the electric drill gear or the electric hammer gear only by rotating a large stroke to enable the adjusting ring to finish corresponding all torque values.

The applicant previously filed chinese patent publication No. CN108626326A, entitled "a gear box and an electric tool with the gear box", which discloses an electric tool, wherein a first extension spring is compressed by adjusting displacement of a threaded sleeve through rotation of a torque cup, and adjustment of different gears of the whole electric tool is realized through different pressures of the extension spring and a pair of torque gaskets.

Present moment of torsion keeps off position and all reaches up to 21 keeps off, circumference evenly distributed 21 keeps off on the moment of torsion cup promptly, if when switching to the impact fender position, need rotate earlier moment of torsion fender position to the highest grade and twist reverse 21 fender positions last promptly, expanding spring can block dead moment gasket completely, just can rotate to the impact fender position afterwards, but the design of general inside core structure, lead to needing great power just to rotate last impact fender position, it is very hard, find 20 function fender positions totally unnecessary in the use simultaneously.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a moment guiding mechanism of gear box has and switches to the laborsaving effect of impact fender position.

The above technical purpose of the present invention can be achieved by the following technical solutions: a torque adjustment mechanism of a gearbox comprises a planetary gearbox and an adjusting component;

the adjusting component comprises a mounting seat connected with the planetary gear box, a moment gasket sequentially sleeved on the mounting seat, an elastic pressing piece, a threaded sleeve abutting against one end of the elastic pressing piece, and a torque cup sleeved at the outer end of the threaded sleeve, and the torque cup is axially positioned and circumferentially rotates at the front end of the mounting seat;

a ball pressing piece is arranged on the mounting seat, one end of the ball pressing piece is abutted against the end face of a gear disc arranged on the planetary gear box, the other end of the ball pressing piece is abutted against the end face of the torque gasket, and a positioning block is convexly arranged on the gear disc towards the end face of the ball pressing piece;

the torque cup is characterized in that the torque gasket moves axially and is circumferentially positioned on the mounting seat, a groove is formed in the outer peripheral wall of the torque gasket, and the torque cup is provided with axially distributed convex blocks which can tightly abut against the end face of the torque gasket or are positioned in the groove.

Through adopting above-mentioned technical scheme, the thread bush is connected in the moment of torsion cup, the rotation through the moment of torsion cup has driven the axial displacement of thread bush for the thread bush orders about the compression that elasticity compressed tightly the piece, elasticity compressed tightly the back, the other end supports the moment gasket tightly, and then makes the moment gasket compress tightly the ball on the terminal surface of toothed disc, simultaneously because the setting of the locating piece on the toothed disc, it is spacing with the toothed disc that the realization elasticity compressed tightly the piece, thereby realize the switching of the function fender of the different moments of torsion of electric tool. On the other hand has the recess in the periphery distribution of moment gasket, and the inside lug that is provided with of moment of torsion cup when the lug is located the recess, the ball compresses tightly the piece and compresses tightly compressing tightly the compressing tightly of piece to the moment gasket through thread bush and elasticity, and the locating piece on the gear plate is spacing by the ball elastic component this moment, but because elasticity compresses tightly the piece and can be compressed, and then whole planetary gear box still can work. When lug and moment gasket in the moment of torsion cup supported tightly relatively, the position of moment gasket was fixed to it is that the ball compresses tightly a position and is injectd, and the toothed disc fixes a position, realizes changing into the impact head from the functional head. Compare in prior art, compress tightly the piece with elasticity and compare the gear disc location after the complete compression, need not to rotate the moment of torsion cup to last fender, therefore this mode operation is more laborsaving.

The utility model discloses a further set up to: the mounting base comprises a connecting base and an inserting column, a plurality of placing holes for the balls to be placed are formed in the connecting base, and the length of each ball pressing piece is larger than the axial length of each placing hole.

Through adopting above-mentioned technical scheme, the length that the ball compressed tightly the piece is greater than the length of placing the hole, and outstanding both ends in the connecting seat promptly can mutually butt with moment gasket and toothed disc terminal surface respectively, realize making the ball compress tightly the piece and have different pressure to the toothed disc when moment gasket displacement.

The utility model discloses a further set up to: the outer wall of the inserting column is convexly provided with a positioning strip, and the inner ring of the moment gasket is provided with a positioning groove for the insertion of the positioning strip.

Through adopting above-mentioned technical scheme, the moment gasket cover is established on this grafting post after, and the constant head tank cover is established on location strip outer wall, realizes circumference location, can axial displacement on the grafting post simultaneously for when elasticity compresses tightly the displacement that the piece can drive moment gasket, the moment gasket can not take place to rotate because of the rotation of moment of torsion cup, has ensured that the lug of moment of torsion cup can the butt on the moment gasket.

The utility model discloses a further set up to: the front end of the insertion column is connected with a positioning plate which is abutted against the front end of the torque cup.

Through adopting above-mentioned technical scheme, after the moment of torsion cup jointed on the grafting post, the locating plate is fixed to the grafting post on, and the terminal surface of locating plate still the butt simultaneously is on the preceding terminal surface of moment of torsion cup, has realized realizing for the axial positioning of grafting post when having avoided dropping on the moment of torsion cup and the grafting post, ensures that the moment of torsion cup can be on the grafting post continuously the pivoted drive thread bush compresses tightly elastic compressing member simultaneously.

The utility model discloses a further set up to: the inner wall of the torque cup is provided with a limiting ring for limiting the threaded sleeve, and the front end of the threaded sleeve is also provided with a positioning ring for abutting the elastic pressing piece.

Through adopting above-mentioned technical scheme, when the moment of torsion cup passes through the locating plate location on the plug column, the spacing ring that the inner wall set up can the one end of thread bush, forces the thread bush towards other end axial displacement. The holding ring that sets up on the thread bush is used for compressing tightly elasticity and compresses tightly the piece and realize compressing elasticity and compressing tightly the piece.

The utility model discloses a further set up to: and arc chamfers are arranged on two sides of the front end of the bump.

Through adopting above-mentioned technical scheme, when the moment of torsion cup rotates the in-process, the terminal surface that enters into recess and moment gasket of each lug homocycle, therefore the setting of this circular arc chamfer can make when the crisscross operation each other between lug and the moment gasket, both can not take place to block the emergence that leads to the phenomenon that the moment of torsion cup can not rotate after dying.

The utility model discloses a further set up to: the ball pressing pieces are two steel balls which are arranged in the placing holes.

Through adopting above-mentioned technical scheme, two steel balls constitute and make the ball compress tightly the piece and have longer length in, the width is narrower, therefore the less aperture of placing the hole greatly.

The utility model discloses a further set up to: the connecting seat and the planetary gear box are fixed through a flange seat.

Through adopting above-mentioned technical scheme, the connecting seat in the mount pad can be installed fixedly fast with planetary gear through the flange seat, improves production efficiency.

The utility model aims at providing an adjust laborsaving electric tool in fender position.

The above technical purpose of the present invention can be achieved by the following technical solutions: an electric tool comprises the torque adjusting mechanism of the gear box.

The utility model discloses a further set up to: the torque cup is provided with six gears, and when the torque cup rotates to an impact gear, the convex block abuts against the end face of the torque gasket.

Through adopting above-mentioned technical scheme, this electric tool only keeps off six, and five functions keep off and an impact keeps off, and when switching to the impact fender, the lug is kept off with moment gasket looks butt, realizes the complete spacing to the toothed disc promptly, therefore does not have to rotate full round and compress tightly the complete compaction of piece with elasticity and just can switch to the impact fender, operates more laborsavingly.

To sum up, the utility model discloses following beneficial effect has: through the switching that different functions kept off is realized to the degree that compresses tightly of adjusting elasticity pressing part to the moment gasket, on the other hand directly carries on spacingly to the moment gasket through the lug that sets up on the moment of torsion cup, realizes strikeing the quick spacing that keeps off for need not to continue to rotate the moment of torsion cup again and compress tightly elasticity pressing part completely, make to strike and keep off the switching more laborsaving convenient.

Drawings

FIG. 1 is an exploded schematic view of an adjustment mechanism;

FIG. 2 is a schematic structural view of a middle mount and a planetary gearbox;

FIG. 3 is an enlarged schematic view of section A of FIG. 1;

FIG. 4 is an exploded schematic view of the adjustment member;

FIG. 5 is a schematic diagram of the construction of the torque cup and torque washer;

fig. 6 is a cross-sectional view of the adjustment mechanism.

In the figure: 1. a planetary gear box; 1-1, a gear disc; 2. an adjustment member; 3. a mounting seat; 4. a moment pad; 5. an elastic pressing member; 6. a threaded sleeve; 7. a torque cup; 8. a ball hold down; 9. positioning blocks; 10. a groove; 11. a bump; 12. a connecting seat; 13. inserting the column; 14. placing holes; 15. a positioning bar; 16. positioning a groove; 17. positioning a plate; 18. a limiting ring; 19. a positioning ring; 20. chamfering with an arc; 21. steel balls; 22. and (4) a flange seat.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The first embodiment is as follows: a torque adjustment mechanism for a gearbox, see figure 1, comprises a planetary gearbox 1 with an output shaft, an adjustment member 2 connected to the planetary gearbox 1. The adjusting member 2 comprises a mounting seat 3, and the mounting seat 3 can also be used as an upper end cover of the planetary gear box 1. Wherein the mounting base 3 comprises a vertical column-shaped plug column 13 and a connecting base 12 connected with the planetary gear box 1. The adjusting component 2 further comprises a ball pressing piece 8 positioned in the connecting seat 12, a moment gasket 4, an elastic pressing piece 5, a threaded sleeve 6 and a torque cup 7 which are sequentially sleeved on the inserting column 13.

Referring to fig. 2 and 3, a flange seat 22 is provided on the outer peripheral side of connecting holder 12, and a flange seat 22 is also provided on planetary gear case 1 on the side facing connecting holder 12, and both are fastened by bolts. Six through placing holes 14 are uniformly distributed on the peripheral side of the connecting seat 12, a ball pressing piece 8 is placed in the placing holes 14, the ball pressing piece 8 comprises two steel balls 21 which are sequentially inserted in the placing holes 14, the length of the next ball pressing piece 8 is larger than the depth of the placing holes 14, and two ends of the next ball pressing piece protrude out of the outer end of the connecting seat 12. The planetary gear case 1 comprises a gear disc 1-1, the gear disc 1-1 is also used for positioning the position of the ball pressing piece 8 when the connecting base 12 is installed on the planetary gear case 1, meanwhile, six positioning blocks 9 are convexly arranged on the end face, and the upper ends of the positioning blocks 9 are arranged in a cambered surface mode.

Referring to fig. 1, the moment gasket 4 is firstly sleeved on the insertion column 13, and after the moment gasket 4 is inserted into the insertion column 13, the lower end surface of the moment gasket abuts against the ball pressing piece 8 protruding out of the connecting seat 12. Then, a spring as the elastic pressing piece 5 is sleeved on the plug column 13. On the other hand thread bush 6 can install earlier in moment of torsion cup 7, and the elasticity is installed and is pressed tightly the piece 5 after with this moment of torsion cup 7 cover and establish on this grafting post 13, compresses tightly this moment of torsion cup 7 with a locating plate 17 at last, and practical a plurality of bolts are fixed this locating plate 17 to the top of grafting post 13. The positioning plate 17 is abutted against the torque cup 7, and the rotation of the torque cup 7 is not influenced.

Referring to fig. 3, a plurality of axially extending positioning strips 15 are convexly arranged on the outer wall of the insertion column 13, and positioning grooves 16 matched with the positioning strips 15 in shape are arranged in the inner ring of the moment gasket 4, so that the moment gasket 4 is in a motion mode of circumferential positioning and axial movement after being inserted into the insertion column 13. The inner wall of the torque cup 7 is provided with a circle of limiting ring 18 for positioning the position of the threaded sleeve 6, and meanwhile, the torque cup 7 is also internally provided with an internal thread in threaded connection with the threaded sleeve 6, so that the threaded connection between the torque cup 7 and the threaded sleeve 6 is realized. On the other hand, one end of the threaded belt is provided with a positioning ring 19 which can position one end of the elastic pressing piece 5 inserted in the threaded sleeve 6.

When the torque cup 7 rotates, the screw sleeve 6 can be forced to rotate towards the connecting seat 12 due to the fact that the torque cup is axially positioned, the purpose of compressing the elastic compressing piece 5 is achieved, along with compression of the elastic compressing piece 5, after the pressure of the elastic compressing piece 5 on the torque gasket 4 is increased, the pressure of the torque gasket 4 on the ball compressing piece 8 is increased, and finally compression of the ball compressing piece 8 on the gear disc 1-1 is achieved. Along with the difference of the compression degree of the elastic pressing piece 5, the ball pressing piece 8 changes the external force required by the rotation of the gear disc 1-1, and further the adjustment of the multi-gear torque of the electric tool is realized.

Referring to fig. 5, torque cup 7 has a plurality of lugs 11 towards circumference distribution on the inner wall of torque gasket 4, and simultaneously torque gasket 4 periphery side evenly distributed has a plurality of recesses 10, and the recess 10 area is greater than the area of lug 11, and lug 11 is provided with circular arc chamfer 20 towards one end both sides of torque gasket 4 for lug 11 is by torque cup 7 when rotating, can follow recess 10 internal slipping to torque gasket 4's terminal surface on, and the operation is more laborsaving smooth and easy.

Referring to fig. 6, the torque cup 7 is axially fixed in position and when the torque cup 7 is rotated, the lugs 11 can be located in the recesses 10 or directly abut against the end face of the torque washer 4. When the lug 11 is positioned in the groove 10, the elastic pressing piece 5 applies pressure to the moment gasket 4, and when the lug 11 abuts against the moment gasket 4 along with rotation, the moment gasket 4 can be directly pressed by the position of the lug 11, the axial movement of the moment gasket 4 is positioned, the rotation of the gear disc 1-1 can be directly blocked, and the switching from the function gear to the impact gear is realized.

Example two: an electric tool comprises the adjusting mechanism described in the first embodiment, the adjusting mechanism is provided with a sixth gear, the torque cup 7 can rotate to the sixth gear only by rotating by a quarter of the angle, namely when the lug 11 of the torque cup 7 abuts against the torque gasket 4, the function gear is switched to the impact gear, and the elastic pressing piece 5 is pressed without rotating the torque cup 7 by one circle with a large force.

It should be noted here that the working principle of the electric tool in the present solution and the working principle of the gear box after being shifted are both prior art, and are not substantially related to the solution to be protected in the present solution, and therefore, will not be described again.

The specific embodiments are only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiments without inventive contribution as required after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. A torque adjustment mechanism for a gearbox comprises a planetary gearbox (1) and an adjustment member (2);

the adjusting component (2) comprises a mounting seat (3) connected with the planetary gear box (1), a moment gasket (4) sequentially sleeved on the mounting seat (3), an elastic pressing piece (5), a threaded sleeve (6) abutted against one end of the elastic pressing piece (5), and a torque cup (7) sleeved at the outer end of the threaded sleeve (6), wherein the torque cup (7) is axially positioned and circumferentially rotates at the front end of the mounting seat (3);

the method is characterized in that: a ball pressing piece (8) is arranged on the mounting seat (3), one end of the ball pressing piece (8) is abutted against the end face of a gear disc (1-1) arranged on the planetary gear box (1), the other end of the ball pressing piece is abutted against the end face of the moment gasket (4), and a positioning block (9) is arranged on the end face, facing the ball pressing piece (8), of the gear disc (1-1) in a protruding mode;

moment gasket (4) axial displacement and circumference location are on mount pad (3), and recess (10) have been seted up to the periphery wall, lug (11) that torque cup (7) inner wall axial distributes, lug (11) can support tightly moment gasket (4) terminal surface or be located in recess (10).

2. A torque adjustment mechanism for a gearbox according to claim 1 wherein: the mounting seat (3) comprises a connecting seat (12) and an inserting column (13), a plurality of placing holes (14) for placing the ball pressing pieces (8) are formed in the connecting seat (12), and the length of each ball pressing piece (8) is larger than the axial length of each placing hole (14).

3. A torque adjustment mechanism for a gearbox according to claim 2 wherein: the outer wall of the inserting column (13) is convexly provided with a positioning strip (15), and the inner ring of the moment gasket (4) is provided with a positioning groove (16) for inserting the positioning strip (15).

4. A torque adjustment mechanism for a gearbox according to claim 3 wherein: the front end of the inserting column (13) is connected with a positioning plate (17), and the positioning plate (17) is abutted to the front end of the torque cup (7).

5. A torque adjustment mechanism for a gearbox according to claim 4 wherein: the inner wall of the torque cup (7) is provided with a limiting ring (18) used for limiting the threaded sleeve (6), and the front end of the threaded sleeve (6) is further provided with a positioning ring (19) for abutting the elastic pressing piece (5).

6. A torque adjustment mechanism for a gearbox according to claim 5 wherein: arc chamfers (20) are arranged on two sides of the front end of the convex block (11).

7. A torque adjustment mechanism for a gearbox according to claim 6 wherein: the ball pressing pieces (8) are two steel balls (21) placed in the placing holes (14).

8. A torque adjustment mechanism for a gearbox according to claim 7 wherein: the connecting seat (12) and the planetary gear box (1) are fixed through a flange seat (22).

9. An electric power tool characterized in that: torque adjustment mechanism comprising a gearbox according to any of the claims 1-8.

10. A power tool according to claim 9, wherein: the torque cup (7) is provided with six gears, and when the torque cup (7) rotates to an impact gear, the convex block (11) abuts against the end face of the torque gasket (4).