CN208214403U - It is convenient for changing the angular bit of drill bit - Google Patents

Abstract

The utility model relates to a kind of angular bits for being convenient for changing drill bit, drill bit assembly is connected by single direction locking mechanism with transmission mechanism transmission, single direction locking mechanism includes trig loop, it is connected to the driving link of the output end of transmission mechanism, driving link has at least two to extend forward and circumferentially spaced convex block；Be connected to obtain driven member with drill bit assembly, and driven member includes cartridge part and the retainer for taking shape in cartridge part front end, and cartridge part is plugged in driving link, and there are the running clearances relatively rotated for the two between cartridge part and driving link；Retainer is located in trig loop and has gap therebetween, gap is divided into several circumferentially distributed tapered regions, it is equipped with a roller or a convex block in each tapered region, roller and the setting of convex block alternate intervals, the diameter of roller are greater than the miner diameter end of tapered region and are less than the bigger diameter end of tapered region；In the state that driving link is rotated relative to driven member, convex portion enters in adjacent tapered region and and roller-contact.

Description

It is convenient for changing the angular bit of drill bit

Technical field

The utility model belongs to the technical field of electric tool, and in particular to a kind of angular bit for being convenient for changing drill bit.

Background technique

Angular bit is called angular drill, angular electric hand drill, and work head is short, the arm of angle is away from small, can be difficult to operation in general electric drill Position easy manipulation provides perfect drilling effect for the operating location of narrow space.

Angular bit be frequently necessary in actual use dismounting or more bit change, and the drill bit of existing angular bit pass through as lower component with Transmission mechanism connection, as shown in Figure 1, drill bit assembly includes drill chuck 05 and the driving work of drill chuck 05 for installing drill bit Driving structure assembly, which includes the first drive shaft 01 being connected with drill chuck 05, fixing assembling in first First gear 02 in drive shaft 01, the second drive shaft 03 being connected with transmission mechanism, fixing assembling are in the second drive shaft 03 Second gear 04, the first gear 02 and second gear 04 engage.So when angular bit works, transmission mechanism is successively transmitted Power is to the second drive shaft 03, the first drive shaft 01 finally to drill bit；Conversely, the rotation of drill bit will lead to when dismantling drill bit Driving structure assembly rotates with, therefore in dismounting and change drill bit, needs fixed driving structure assembly on the other hand, the rotation of another hand Drill bit is dismantled, it is inconvenient and quite laborious, or even need two person cooperative works that could complete.

Utility model content

For the current state of the art, the technical problem to be solved by the utility model is to provide drive when a kind of disassembly drill bit What dynamic structural assembly will not rotate with it is convenient for changing the angular bit of drill bit.

Technical solution adopted by the utility model to solve the above technical problems is as follows: a kind of angular bit for being convenient for changing drill bit, Transmission mechanism including drill bit assembly and control drill bit assembly work for installing drill bit, it is characterised in that: the drill bit group Part is connected by single direction locking mechanism with transmission mechanism transmission, and the single direction locking mechanism includes:

Trig loop；

Driving link, is connected to the output end of transmission mechanism, the driving link have at least two extend forward and be circumferential between Every the convex block of setting；

Driven member is connected with drill bit assembly, and the driven member includes cartridge part and the stop for taking shape in cartridge part front end Portion, the cartridge part be plugged in driving link, and there are relatively rotate by a certain angle for the two between cartridge part and driving link Running clearance；

The retainer is located in trig loop and has gap therebetween, and the gap is divided into several circumferentially distributed wedges Shape area, the miner diameter end and the bigger diameter end between two miner diameter ends that the tapered region includes two sides, the width of the miner diameter end Less than the width of bigger diameter end, a roller or a convex block, the roller and convex block alternating are equipped in each tapered region Interval setting, the diameter of the roller are greater than the width of miner diameter end and are less than the width of bigger diameter end；In driving link with respect to driven member In the state of rotation, the convex portion, which enters in adjacent tapered region, shelters from miner diameter end, turns in driven member with respect to driving link In the state of dynamic, the roller is caught in miner diameter end.

The periphery contour of the retainer is polygon, and one is formed between each side of the polygon and trig loop The tapered region, retainer structure are simple and easy to manufacture.

To enable convex block that roller to be pushed to rotate synchronously, the driving link is equipped with the cavity portion being placed in for cartridge part, described It is circumferentially spaced on the periphery wall of cartridge part to be equipped at least two claws, it is convexly equipped on the peripheral wall of the cavity portion and the claw phase Match spaced protrusion, formed between adjacent projection it is fluted, the claw corresponding inserted in groove and therebetween With the running clearance.

To prevent trig loop generation from circumferentially rotating or axial displacement, energy is circumferentially convexly equipped on the periphery wall of the trig loop The key being placed in the keyway of angular bit, so that trig loop is fixedly installed in the shell of angular bit.

The drill bit assembly includes the drill chuck for installing drill bit, the driving mechanism assembly being connected with drill chuck, the driving Mechanism assembly include the first drive shaft being connected with drill chuck, fixing assembling in the first drive shaft first gear, with it is driven In the second gear in the second drive shaft, the first gear and second gear are nibbled for the second connected drive shaft of part, fixing assembling It closing, the power of transmission mechanism is finally transmitted to drill bit through driving link, driven member, and when rotary drilling-head, because driven member is by roller Limitation be not able to rotate, therefore driving structure assembly not can rotate, with drill bit easy to disassemble.

Compared with prior art, the advantages of the utility model: the utility model makes drill bit by setting single direction locking mechanism Power between component and transmission mechanism is transmitted by single direction locking mechanism, and such transmission mechanism can transmit power to drill bit group Part, and drill bit assembly is unable to reverse power transmission to transmission mechanism, so that the driving structure of drill bit assembly is total when dismantling drill bit At that will not rotate with drill chuck, make drill bit convenient disassembly.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of existing drill bit assembly；

Fig. 2 is the cross-sectional view of the utility model embodiment；

Fig. 3 is the partial structural diagram of Fig. 2；

Fig. 4 is the structural schematic diagram of the monodirectional locking structure of Fig. 3；

Fig. 5 is the bottom view of Fig. 4；

Fig. 6 is the decomposition diagram of Fig. 4；

Fig. 7 is the decomposition diagram of the other direction of Fig. 4.

Specific embodiment

The utility model is described in further detail below in conjunction with figure embodiment.

As shown in Fig. 2~7, the angular bit for being convenient for changing drill bit of this preferred embodiment includes the drill bit group for installing drill bit The transmission mechanism that part 1 and control drill bit assembly 1 work, drill bit assembly 1 are connected by single direction locking mechanism with transmission mechanism transmission. The driving mechanism assembly that drill bit assembly 1 includes the drill chuck 15 of installation drill bit, is connected with drill chuck 15, the driving mechanism assembly packet The first drive shaft 11 being connected with drill chuck 15, fixing assembling are included in first gear 12 and driven member 4 in the first drive shaft 11 Connected the second drive shaft 13, fixing assembling are in the second gear 14 in the second drive shaft 13, first gear 12 and second gear 14 engagements.

As also shown in e.g. figs. 4-7, single direction locking mechanism includes trig loop 2, driving link 3 and driven member 4, and trig loop 2 is fixedly installed In the key 21 being circumferentially convexly equipped in the shell of angular bit, on the periphery wall of trig loop 2 in the keyway 71 that can be placed in angular bit, keyway 71 It is opened on the internal perisporium of gear-box 7 of angular bit shell.

Driving link 3 is connected to the output end of transmission mechanism, and driven member 4 is connected with the second drive shaft 13.

Driven member 4 includes cartridge part 41 and the retainer 42 for taking shape in 41 front end of cartridge part, and cartridge part 41 is plugged in actively It is circumferentially spaced on the periphery wall of cartridge part 41 to set there are five claw 411 in the cavity portion 32 of part 3, projection on the peripheral wall of cavity portion 32 Have and match spaced protrusion 321 with claw 411, form fluted 322 between adjacent projection 321, claw 411 is corresponding to be inserted There is running clearance in groove 322 and between claw 411 and protrusion 321.In running clearance, driving link 3 and driven member 4 Between can relatively rotate by a certain angle.

There are five extension and circumferentially spaced convex blocks 31 forward for the tool of driving link 3, before which is located at cavity portion 32 End.Retainer 42 is located in trig loop 2 and has gap between retainer 42 and trig loop 2, which is divided into several circumferential directions point The tapered region 5 of cloth, the miner diameter end 51 and the bigger diameter end 52 between two miner diameter ends 51 that each tapered region 5 includes two sides are small The width d1 at diameter end 51 is less than the width d2 of bigger diameter end 52.

A roller 6 or a convex block 31, roller 6 and the setting of 31 alternate intervals of convex block, rolling are equipped in each tapered region 5 The diameter of column 6 be greater than miner diameter end 51 width d1 and be less than bigger diameter end 52 width d2.

The course of work of the angular bit of the present embodiment are as follows: when angular bit works, the power of transmission mechanism, which is transferred to driving link 3, to be made to lead Moving part 3 is rotated relative to driven member 4, and convex block 31 also rotates with it and part enters the adjacent tapered region 5 of its original present position Interior, convex block 31 shelters from miner diameter end 51 at this time；(i.e. claw 411 and protrusion 321 at this time after driving link 3 rotates through running clearance Between running clearance disappear, claw 411 and protrusion 321 contact), convex block 31 is contacted with roller 6, at this point, driven member 4 is in driving link It is rotated synchronously under 3 drive, roller 6 also rotates synchronously under the drive of convex block 31, and roller 6 is in the major diameter of tapered region 5 always End 52.

The rotation of driven member 4 drives the rotation of the second drive shaft 13, and second gear 14 rotates with and drives the engaged The rotation of one gear 12, the first drive shaft 11 rotate with and drill chuck 15 are driven to rotate.

When dismantling angular bit, the rotation of drill chuck 15 is driven through the first drive shaft 11, first gear 12, second gear 14, second Moving axis 13 finally transmits power to driven member 4, rotates driven member 4 relative to driving link 3, during driven member 4 rotates, rolling The location of column 6 is become the miner diameter end 51 of tapered region 5 from the bigger diameter end 52 of tapered region 5, when driven member 4 turns over running clearance When, roller 6 is stuck at miner diameter end 51, to limit continuing to rotate for driven member 4.At this point, continue rotary drilling-head, driving knot Structure assembly so can easily dismantle drill bit without continuing to rotate with drill bit because of the limitation of driven member 4.

In the present embodiment, the periphery contour of retainer 42 is polygon, each side 421 of polygon and trig loop 2 it Between form a tapered region 5,42 structure of retainer is simple and easy to manufacture.

Claims (5)

1. a kind of angular bit for being convenient for changing drill bit, including the drill bit assembly (1) and control drill bit assembly (1) work for installing drill bit The transmission mechanism of work, it is characterised in that: the drill bit assembly (1) is connected by single direction locking mechanism with transmission mechanism transmission, institute Stating single direction locking mechanism includes:

Trig loop (2), fixed setting；

Driving link (3), is connected to the output end of transmission mechanism, and the driving link (3) has at least two to extend forward and circumferential Spaced convex block (31)；

Driven member (4) is connected with drill bit assembly (1), and the driven member (4) includes cartridge part (41) and takes shape in cartridge part (41) retainer (42) of front end, the cartridge part (41) are plugged in driving link (3), and cartridge part (41) and driving link (3) Between there are the running clearances that can be relatively rotated by a certain angle for the two；

The retainer (42) is located in trig loop (2) and has gap therebetween, and the gap is divided into several circumferentially distributed Tapered region (5), tapered region (5) include the miner diameter end (51) of two sides and the bigger diameter end that is located between two miner diameter ends (51) (52), the width (d1) of miner diameter end (51) is less than the width (d2) of bigger diameter end (52), is equipped with a rolling in each tapered region (5) Column (6) or a convex block (31), the roller (6) and the setting of convex block (31) alternate intervals, the diameter of the roller (6) are big In miner diameter end (51) width (d1) and be less than bigger diameter end (52) width (d2)；It is rotated in driving link (3) relative to driven member (4) In the state of, the convex block (31), which partially enters in adjacent tapered region (5), shelters from miner diameter end (51), in driven member (4) phase In the state of driving link (3) rotation, the roller (6) is caught in miner diameter end (51).

2. the angular bit according to claim 1 for being convenient for changing drill bit, it is characterised in that: the periphery wheel of the retainer (42) Exterior feature is polygon, and between each side (421) and trig loop (2) of the polygon tapered region (5) described in formation one.

3. the angular bit according to claim 2 for being convenient for changing drill bit, it is characterised in that: the driving link (3), which is equipped with, to supply The cavity portion (32) of cartridge part (41) merging, it is circumferentially spaced on the periphery wall of the cartridge part (41) to be equipped at least two claws (411), it is convexly equipped on the peripheral wall of the cavity portion (32) and matches spaced protrusion (321) with the claw (411), it is adjacent Formed between protrusion (321) fluted (322), claw (411) corresponding inserted in the groove (322), and claw (411) and There is the running clearance between protrusion (321).

4. the angular bit according to claim 3 for being convenient for changing drill bit, it is characterised in that: the periphery wall of the trig loop (2) On be circumferentially convexly equipped with key (21) in the keyway (71) that can be placed in angular bit.

5. the angular bit according to claim 1 for being convenient for changing drill bit, it is characterised in that: the drill bit assembly (1) includes peace Fill the drill chuck (15) of drill bit, the driving mechanism assembly that is connected with drill chuck (15), the driving mechanism assembly includes and drill point Connected the first drive shaft (11) of head (15), fixing assembling are in first gear (12) and driven member on the first drive shaft (11) (4) connected the second drive shaft (13), fixing assembling are in the second gear (14) on the second drive shaft (13), the first gear (12) it is engaged with second gear (14).