CN202850869U

CN202850869U - Ground auger bit

Info

Publication number: CN202850869U
Application number: CN 201220595444
Authority: CN
Inventors: 李峰; 韦奇峰; 钱永富
Original assignee: YONGKANG VALID GARDEN MACHINE CO Ltd
Current assignee: YONGKANG VALID GARDEN MACHINE CO Ltd
Priority date: 2012-11-13
Filing date: 2012-11-13
Publication date: 2013-04-03
Anticipated expiration: 2022-11-13

Abstract

The utility model discloses a ground auger bit. The ground auger bit comprises a connecting shaft (1), a torsional spring (2), a bit casing pipe (3), a middle drill pipe (4), a screw blade (5), a bit front blade (6), a bit knifepoint (7), a bit knife blade (8) and a boss (9). The bit front blade (6) is fixedly connected with the middle drill pipe (4) and the bit knifepoint (7). The boss (9) is fixedly connected with the bit front blade (6) and the middle drill pipe (4). The bit knife blade (8) is fixed on the boss (9). The connecting shaft (1) is provided with a mandrel (12). The mandrel (12) is provided with a mandrel card slot (13) and sleeved inside the bit casing pipe (3). A positioning screw (14) matched with the mandrel card slot (13) is fixed on the bit casing pipe (3). The head part of the positioning screw (14) inserts into the mandrel card slot (13). The torsional spring (2) is sleeved and fixed on the connecting shaft (1) and the bit casing pipe (3). With the above structure used, the ground auger bit has the advantages of being simple and rational in structure, convenient to operate and use, low in labor intensity, high in work efficiency, long in service life and the like.

Description

Earth-boring bit

Technical field

The utility model relates to a kind of gardens and agriculture forestry planting instrument, particularly a kind of flexibly drill bit that is used for cutting the earth and burrows.

Background technology

In the Chinese garden planting process in order to plant trees or set up timber guardrail etc., perhaps the agriculture forestry planting industrial crops as building grape trellis, conceding the land to forestry is planted trees etc., all need to cut the earth on the ground and burrow, the method normal operation hand-operated tools of transmission digs a hole to plant trees etc., as use hoe, spade pick or spades etc., time-consuming again effort, inefficiency, labour intensity is large, and labour cost is high, in order to improve working conditions, increase work efficiency, reduce labour cost, people have developed some motor-driven shovelings instrument that burrows, but in use there is complex structure, application life is short, cost of production is high, uses the problems such as inconvenient.For this reason, many manufacturers and knowledgeable people have carried out development, but not yet have so far satisfied product to come out on the market.

Summary of the invention

For overcoming the existing motor-driven shoveling instrument above shortcomings that burrow, the purpose of this utility model provide a kind of simple and reasonable, easy for operation, labour intensity is low, the earth-boring bit of high efficiency, long service life.

The utility model solves the technical scheme that its technical problem adopts, it comprises connecting axle, torsion spring, bit sleeve, middle drilling pipe, helical blade, drill bit frontal lobe, drill bit point of a knife, drill tip, boss, middle drilling pipe is fixed on the bit sleeve, helical blade is fixed on the middle drilling pipe, the end of drilling pipe in the middle of the drill bit point of a knife is fixed on, described drill bit frontal lobe is fixedly connected with middle drilling pipe and drill bit point of a knife, boss is fixedly connected with drill bit frontal lobe and middle drilling pipe, and drill tip is fixed on the boss.

Described connecting axle is provided with mandrel, mandrel is provided with the mandrel draw-in groove, core sleeve is located in the bit sleeve, be fixed with the dog screw that matches with the mandrel draw-in groove on the bit sleeve, the head of dog screw inserts in the mandrel draw-in groove, torsion spring set is located on connecting axle and the bit sleeve, and the upper end of torsion spring is fixed on the connecting axle, and the lower end of torsion spring is fixed on the bit sleeve.

The blade of described drill tip is provided with the hack notch, and the blade of drill tip becomes 10 degree angles with level.

The end of drilling pipe is provided with slot in the middle of described, and the drill bit point of a knife is weldingly fixed on this slot.

After adopting said structure, have the following advantages compared with the prior art and effect; The one, owing to being connected by torsion spring between connecting axle and the bit sleeve, the core sleeve of connecting axle is located in the bit sleeve, be fixed with the dog screw that matches with the mandrel draw-in groove on the bit sleeve, can guarantee that connecting axle and bit sleeve relatively rotate, can not separate even unclamp at torsion spring fracture or fixed screw yet, torsion spring can prevent the injury of reactive torque active force, guarantees to operate safe and reliable.The 2nd, because the drill bit frontal lobe is fixedly connected with middle drilling pipe and drill bit point of a knife, boss is fixedly connected with drill bit frontal lobe and middle drilling pipe, and drill tip is fixed on the boss, bore power large, the shoveling efficient that burrows is high, drilling life of bit is long.The 3rd, because the blade of drill tip is provided with the hack notch, dig out the naturally broken disengaging of the soil block that comes, can alleviate load, the blade of drill tip becomes 10 degree angles with level, and the feed angle is reasonable.

Description of drawings

Fig. 1 is that master of the present utility model looks schematic diagram.

Fig. 2 is elevational schematic view of the present utility model.

Fig. 3 is that schematic diagram is looked on a left side of the present utility model.

Fig. 4 is decomposition texture schematic diagram of the present utility model

1 connecting axle wherein, 2 torsion springs, 3 bit sleeves, drilling pipes in the middle of 4,5 helical blades, 6 drill bit frontal lobes, 7 drill bit points of a knife, 8 drill tips, 9 bosses, 10 hack notches, 11 bearing pin installing holes, 12 mandrels, 13 mandrel draw-in grooves, 14 dog screws.

The specific embodiment

Fig. 1 is to shown in Figure 4, specific embodiments for a kind of earth-boring bit of the utility model, it comprises connecting axle 1, torsion spring 2, bit sleeve 3, middle drilling pipe 4, helical blade 5, drill bit frontal lobe 6, drill bit point of a knife 7, drill tip 8, boss 9, middle drilling pipe 4 is fixed on the bit sleeve 3, helical blade 5 is fixed on the middle drilling pipe 4, the end of drilling pipe 4 in the middle of drill bit point of a knife 7 is fixed on, described drill bit frontal lobe 6 is fixedly connected with middle drilling pipe 4 and drill bit point of a knife 7, boss 9 is fixedly connected with drill bit frontal lobe 6 and middle drilling pipe 4, and drill tip 8 is fixed on the boss 9.Described connecting axle 1 is provided with mandrel 12, mandrel 12 is provided with mandrel draw-in groove 13, mandrel 12 is set in the bit sleeve 3, be fixed with the dog screw 14 that matches with mandrel draw-in groove 13 on the bit sleeve 3, the head of dog screw 14 inserts in the mandrel draw-in groove 13, dog screw 14 plays connection function, can guarantee that connecting axle 1 can not separate with bit sleeve 3, torsion spring 2 is set on connecting axle 1 and the bit sleeve 3, the upper end of torsion spring 2 is fixed on the connecting axle 1 by screw, pad and nut, and the lower end of torsion spring 1 is fixed on the bit sleeve 3 by screw, pad and nut.

Be fixedly connected with the engine mission output shaft for the ease of connecting axle 1, described connecting axle 1 is provided with bearing pin installing hole 11.In order to make the plot of digging out naturally broken, the blade of described drill tip 8 is provided with hack notch 10, and in order to make the feed angle reasonable, the blade of drill tip 8 becomes 10 degree angles with level.In order to guarantee drill bit point of a knife 7 and middle drilling pipe 4 fixations, the end of described middle drilling pipe 4 is provided with slot, and drill bit point of a knife 7 is weldingly fixed on this slot.

The above; being an embodiment of the present utility model, is not that the utility model is made any pro forma restriction, is not breaking away from the technical solution of the utility model basis; the simple modification of having done, equivalent variations or modification all fall into protection domain of the present utility model.

Claims

1. earth-boring bit, comprise connecting axle (1), torsion spring (2), bit sleeve (3), middle drilling pipe (4), helical blade (5), drill bit frontal lobe (6), drill bit point of a knife (7), drill tip (8), boss (9), middle drilling pipe (4) is fixed on the bit sleeve (3), helical blade (5) is fixed on the middle drilling pipe (4), the end of drilling pipe (4) in the middle of drill bit point of a knife (7) is fixed on, it is characterized in that: described drill bit frontal lobe (6) is fixedly connected with middle drilling pipe (4) and drill bit point of a knife (7), boss (9) is fixedly connected with drill bit frontal lobe (6) and middle drilling pipe (4), and drill tip (8) is fixed on the boss (9).

2. earth-boring bit according to claim 1, it is characterized in that: described connecting axle (1) is provided with mandrel (12), mandrel (12) is provided with mandrel draw-in groove (13), mandrel (12) is set in the bit sleeve (3), be fixed with the dog screw (14) that matches with mandrel draw-in groove (13) on the bit sleeve (3), the head of dog screw (14) inserts in the mandrel draw-in groove (13), torsion spring (2) is set on connecting axle (1) and the bit sleeve (3), the upper end of torsion spring (2) is fixed on the connecting axle (1), and the lower end of torsion spring (1) is fixed on the bit sleeve (3).

3. earth-boring bit according to claim 1 and 2, it is characterized in that: the blade of described drill tip (8) is provided with hack notch (10), and the blade of drill tip (8) becomes 10 degree angles with level.

4. earth-boring bit according to claim 3 is characterized in that: the end of drilling pipe (4) is provided with slot in the middle of described, and drill bit point of a knife (7) is weldingly fixed on this slot.