CN218135140U

CN218135140U - Gear switching device of electric tool impact drill gearbox

Info

Publication number: CN218135140U
Application number: CN202222124419.0U
Authority: CN
Inventors: 夏玉亮; 阮中超
Original assignee: Yangzhou Yongsheng Gear Box Ind Co ltd
Current assignee: Yangzhou Yongsheng Gear Box Ind Co ltd
Priority date: 2022-08-12
Filing date: 2022-08-12
Publication date: 2022-12-27
Anticipated expiration: 2032-08-12

Abstract

A gear switching device of an electric tool percussion drill gear box relates to the technical field of electric tools and comprises a motor fixing seat, a lower body, a torque force seat, a speed change mechanism, a clutch and a main shaft; the torque force seat comprises a lower seat body and an upper shell, and a gear switching port is arranged on the upper shell and consists of an electric drill gear, a screw gear and an electric hammer gear; the main shaft penetrates through the lower base body and the upper shell, a fixed ratchet, a rotating ratchet, a switching ring and a bearing are arranged between the upper shell and the main shaft, a fixed claw is integrally arranged on the fixed ratchet, and the fixed claw is arranged at an electric drill stop and a screw stop of the upper shell; the rotary ratchet is connected with a middle spring, and the middle spring is arranged on the fixed ratchet; a lug is integrally arranged on the switching ring, the lug is arranged in the gear switching port and is positioned above the fixed claw, and a clamping groove is arranged on the lug; the upper part of the lower seat body is provided with a switching button which is sleeved outside the upper shell body, the switching button is connected with an axial guide rod, and the guide rod is arranged in the clamping groove. The utility model discloses it is convenient to switch.

Description

Gear shifting device of electric tool impact drill gear box

Technical Field

The utility model relates to an electric tool's technical field especially relates to electric tool strikes structure of boring gear box.

Background

The conventional impact drill is provided with three working modes, namely an electric drill gear, a screw gear and an electric hammer gear, and the traditional structure is a patent with the publication number of CN206216621U, the application number of 2016210532733 and the patent name of 'a gear adjusting device for the impact drill', the mode switching is adjusted by a knob, and the mode switching can be carried out only by screwing the knob to the bottom, so that the switching is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough of prior art, provide a shift auto-change over device who switches convenient electric tool and strike and bore gear box.

The purpose of the utility model is realized like this: the gear switching device of the impact drill gear box of the electric tool comprises a motor fixing seat, a lower body and a torque seat which are sequentially connected from bottom to top, wherein a speed change mechanism is arranged in the lower body and the torque seat, and the speed change mechanism is connected with a main shaft through a clutch; the torque force seat comprises a lower seat body and an upper shell which are integrally arranged, and a gear switching port is arranged on the upper shell and consists of an electric drill gear, a screw gear and an electric hammer gear; the main shaft penetrates through the lower base body and the upper shell, a fixed ratchet, a rotating ratchet, a switching ring and a bearing are sequentially arranged between the upper shell and the main shaft from bottom to top, a fixed claw is integrally arranged on the fixed ratchet, and the fixed claw is arranged at an electric drill stop and a screw stop of the upper shell; a gap is reserved between the rotating ratchet and the fixed ratchet, the rotating ratchet is connected with an intermediate spring, and the intermediate spring is arranged on the fixed ratchet; the switching ring is integrally provided with a convex block, the convex block is arranged in the gear switching port and is positioned above the fixed claw, and a clamping groove is formed in the convex block; a switching button is arranged above the lower seat body, the switching button is sleeved outside the upper shell and is connected with an axial guide rod, and the guide rod of the switching button is arranged in a clamping groove of the bump; a knob is arranged above the switching button, the upper end of the knob is connected with an upper cover plate, the upper cover plate is connected with the upper shell, the upper cover plate is arranged above the bearing, and the main shaft extends out of the upper cover plate; the switching button is rotated, the guide rod is rotated to the gear of the electric drill, the convex block of the switching ring is arranged above the fixed claw of the fixed ratchet, the rotating ratchet is not contacted with the fixed ratchet, and the speed change mechanism is connected with the main shaft through the clutch to output torque; the switching button is rotated, the guide rod is rotated to a screw stop, the convex block of the switching ring is arranged above the fixed claw of the fixed ratchet, the rotating ratchet is not contacted with the fixed ratchet, the speed change mechanism is connected with the main shaft through the clutch to output torque, the speed change mechanism is separated from the main shaft through the clutch, and the main shaft does not output torque; the switching button is rotated, the guide rod is rotated to the electric hammer stop, the convex block of the switching ring leaves the fixed claw of the fixed ratchet, the rotating ratchet is contacted with the fixed ratchet, the main shaft outputs torque to form an impact effect, and the convex block axially moves at the electric hammer stop.

Preferably, the torsion seat is connected with a limiting rod, the switching button is provided with an arc-shaped limiting groove, and the limiting rod of the torsion seat is arranged in the limiting groove of the switching button.

Preferably, two arc-shaped grooves are arranged on the inner wall of the upper shell; the fixed ratchets are provided with three fixed claws, one fixed claw is arranged at an electric drill stop and a screw stop of the upper shell, and the other two fixed claws are respectively arranged in the two arc-shaped grooves.

The utility model has the advantages that: the rotary switching button drives the guide rod, the convex block and the switching ring to rotate together, and the guide rod and the convex block move in the gear switching port, so that three modes of the electric drill gear, the screw gear and the electric hammer gear are switched. The utility model discloses a switching button comes the mode switch of independent control, but free switching under the optional state, and it is convenient to switch.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 isbase:Sub>A view frombase:Sub>A-base:Sub>A in fig. 1.

Fig. 3 is a partial schematic view of the shift to the screw gear.

FIG. 4 is a partial schematic view of a switch to an electric drill stop.

Fig. 5 is a cross-sectional view of fig. 4.

Fig. 6 is a partial schematic view of the shift to the hammer rail.

Fig. 7 is a schematic structural view of the torque base.

Fig. 8 is a view from B-B in fig. 7.

Fig. 9 is a view from direction C-C of fig. 7.

Fig. 10 is a perspective view of fig. 7.

Fig. 11 is a perspective view of the fixed ratchet.

FIG. 12 is a schematic view of the fixed ratchet installed on the torque socket.

Fig. 13 is a schematic structural diagram of the switch knob.

Fig. 14 is a perspective view of fig. 13.

Fig. 15 is an exploded view of fig. 1.

In the figure, 1 motor fixing seat, 2 lower body, 3 torsion seat, 31 lower seat body, 32 upper shell, 33 gear shift switching port, 331 electric drill shift, 332 screw shift, 333 electric hammer shift, 34 limit rod, 35 arc groove, 36 positioning table, 4 switching button, 41 guide rod, 42 limit groove, 5 knob, 6 main shaft, 7 speed change mechanism, 8 clutch, 81 upper steel ball, 82 steel column, 83 lower steel ball, 84 clutch spring, 9 fixed ratchet, 91 fixed pawl, 10 middle spring, 11 rotating ratchet, 12 switching ring, 13 bearing, 14 upper cover plate, 15 lug and 16 clamping groove.

Detailed Description

As shown in fig. 1 to 15, the gear shifting device of the gearbox of the impact drill of the electric tool comprises a motor fixing seat 1, a lower body 2 and a torque seat 3 which are sequentially connected from bottom to top, wherein the torque seat 3 comprises a lower seat body 31 and an upper shell 32 which are integrally arranged, a gear shifting port 33 is arranged on the upper shell 32, the gear shifting port 33 is composed of an electric drill gear 331, a screw gear 332 and an electric hammer gear 333, and two arc-shaped grooves 35 are arranged on the inner wall of the upper shell 32.

A speed change mechanism 7 (the speed change mechanism 7 comprises an inner gear ring, a planetary gear and a rotary disc, which is a mature technology) is arranged in the lower body 2 and the lower seat body 31, the speed change mechanism 7 is connected with the main shaft 6 through a clutch 8 (the clutch 8 comprises a clutch spring 84, a clutch gasket, an upper layer steel ball 81, a lower layer steel ball 83 and a layer of steel column 82, which is a mature technology, between the upper layer steel ball and the lower layer steel ball), the main shaft 6 penetrates through the lower seat body 31 and the upper shell 32, a fixed ratchet 9, a rotary ratchet 11, a switching ring 12 and a bearing 13 are sequentially arranged between the upper shell 32 and the main shaft 6 from bottom to top, three fixed claws 91 are integrally arranged on the fixed ratchet 9, and the three fixed claws 91 are uniformly distributed on the periphery of the fixed ratchet 9 as shown in fig. 12, wherein two fixed claws 91 are respectively arranged in two arc-shaped grooves 35, the other fixed claw 91 is arranged at an electric drilling gear 331 and a screw gear 332 of the upper shell 32, and a positioning table 36 is arranged at the electric hammer 333 to prevent the fixed claws 91 from rotating circumferentially.

A gap is arranged between the rotating ratchet 11 and the fixed ratchet 9, the rotating ratchet 11 is connected with the middle spring 10, and the middle spring 10 is arranged on the fixed ratchet 9. Three lugs 15 are integrally arranged on the switching ring 12, the three lugs 15 are uniformly distributed on the periphery of the switching ring 12, two of the lugs 15 are respectively arranged in the two arc-shaped grooves 35, the other lug 15 is arranged in the gear switching port 33 and is positioned above the fixed claw 91, and a clamping groove 16 is arranged on the lug 15 in the gear switching port 33. Set up switching button 4 in the top of lower pedestal 31, switching button 4 overlaps outside last casing 32, connects gag lever post 34 on lower pedestal 31, sets up arc spacing groove 42 on switching button 4, and gag lever post 34 of lower pedestal 31 sets up in the spacing groove 42 of switching button 4. When the switching knob 4 is rotated, the stopper is stopped by the engagement of the stopper rod 34 and the stopper groove 42. The switching button 4 is connected with an axial guide rod 41, and the upper end of the guide rod 41 is arranged in the clamping groove 16 of the projection 15.

A knob 5 is arranged above a switching button 4, the upper end of the knob 5 is connected with an upper cover plate 14, the upper cover plate 14 is connected with an upper shell 32, the upper cover plate 14 is arranged above a bearing 13, and a main shaft 6 extends out of the upper cover plate 14.

When the switching knob 4 is turned, as shown in fig. 4 and 5, the guide rod 41 is turned to the power drill stop 331, the projection 15 of the switching ring 12 is above the fixing claw 91 of the fixed ratchet 9, the switching ring 12 cannot descend, the rotating ratchet 11 is not in contact with the fixed ratchet 9, the switching knob 4 blocks the steel column 82 and the lower steel ball 83, and the speed change mechanism 7 is connected with the main shaft 6 through the clutch 8 to output torque.

Turning the switch knob 4, as shown in fig. 3, the guide rod 41 is turned to the screw stopper 332, the projection 15 of the switch ring 12 is above the fixing claw 91 of the fixing ratchet 9, the switch ring 12 cannot descend, and the rotating ratchet 11 is not in contact with the fixing ratchet 9; meanwhile, the steel ball 81 on the upper layer rotates to the position right above the steel column 82 (as shown in fig. 2), and the main shaft 6 outputs torque due to the rotation blockage of the steel ball 83 on the lower layer. When the upward jumping force of the lower steel balls 83 is larger than the pressure of the clutch spring 84, the clutch 8 separates the speed change mechanism 7 from the main shaft 6, and the main shaft 6 does not output torque.

When the switch button 4 is turned, as shown in fig. 6, the guide rod 41 is turned to the hammer stop 333, the projection 15 of the switch ring 12 is separated from the fixed claw 91 of the fixed ratchet 9, the switch ring 12 can descend, the projection 15 moves axially at the hammer stop 333, the rotating ratchet 11 is contacted with the fixed ratchet 9, the switch button 4 blocks the steel column 82 and the lower steel ball 83, and the torque output by the main shaft 6 forms an impact effect.

Claims

1. The gear switching device of the impact drill gear box of the electric tool comprises a motor fixing seat, a lower body and a torque seat which are sequentially connected from bottom to top, wherein a speed change mechanism is arranged in the lower body and the torque seat, and the speed change mechanism is connected with a main shaft through a clutch; the method is characterized in that: the torque force seat comprises a lower seat body and an upper shell which are integrally arranged, and a gear switching port is arranged on the upper shell and consists of an electric drill gear, a screw gear and an electric hammer gear; the main shaft penetrates through the lower base body and the upper shell, a fixed ratchet, a rotating ratchet, a switching ring and a bearing are sequentially arranged between the upper shell and the main shaft from bottom to top, a fixed claw is integrally arranged on the fixed ratchet, and the fixed claw is arranged at an electric drill stop and a screw stop of the upper shell; a gap is reserved between the rotating ratchet and the fixed ratchet, the rotating ratchet is connected with an intermediate spring, and the intermediate spring is arranged on the fixed ratchet; the switching ring is integrally provided with a convex block, the convex block is arranged in the gear switching port and is positioned above the fixed claw, and a clamping groove is formed in the convex block; a switching button is arranged above the lower seat body, the switching button is sleeved outside the upper shell and is connected with an axial guide rod, and the guide rod of the switching button is arranged in a clamping groove of the bump; a knob is arranged above the switching button, the upper end of the knob is connected with an upper cover plate, the upper cover plate is connected with the upper shell, the upper cover plate is arranged above the bearing, and the main shaft extends out of the upper cover plate;

the switching button is rotated, the guide rod is rotated to the electric drill gear, the convex block of the switching ring is arranged above the fixed claw of the fixed ratchet, the rotating ratchet is not contacted with the fixed ratchet, and the speed change mechanism is connected with the main shaft through the clutch to output torque;

the switching button is rotated, the guide rod is rotated to a screw stop, the convex block of the switching ring is arranged above the fixed claw of the fixed ratchet, the rotating ratchet is not contacted with the fixed ratchet, the speed change mechanism is connected with the main shaft through the clutch to output torque, the speed change mechanism is separated from the main shaft through the clutch, and the main shaft does not output torque;

the switching button is rotated, the guide rod is rotated to the electric hammer stop, the convex block of the switching ring leaves the fixed claw of the fixed ratchet, the rotating ratchet is contacted with the fixed ratchet, the main shaft outputs torque to form an impact effect, and the convex block axially moves at the electric hammer stop.

2. The gear shifting device of a power tool hammer drill gearbox according to claim 1, wherein: the torsion seat is connected with a limiting rod, the switching button is provided with an arc-shaped limiting groove, and the limiting rod of the torsion seat is arranged in the limiting groove of the switching button.

3. The gear shifting apparatus of a power tool percussion drill gearbox according to claim 1, wherein: two arc-shaped grooves are formed in the inner wall of the upper shell; the fixed ratchets are provided with three fixed claws, one fixed claw is arranged at an electric drill stop and a screw stop of the upper shell, and the other two fixed claws are respectively arranged in the two arc-shaped grooves.