CN207840232U - Compound crusher drill - Google Patents

Abstract

The utility model discloses a kind of compound crusher drills, including：Crusher drill ontology, the crusher drill ontology include bar portion and the abrasive drilling head being connect with the head end of the bar portion, which has at least one first cutting edge；Further include：Hole saw, the hole saw is fixedly provided on the crusher drill ontology, and positioned at first cutting edge close to the side of the bar portion, the hole saw and the crusher drill ontology rotation axis having the same, the hole saw include cylindrical body and are set at least one second cutting edge of the cylindrical body on first cutting edge one end.Compound crusher drill provided by the utility model has abrasive drilling head and hole saw, and abrasive drilling head is for tentatively punching, and hole saw uses building up by welding pattern, makes up the irregular phenomenon of hole wall of the first cutting edge cutting, the size to effective control hole and direction.

Description

Compound crusher drill

Technical field

The utility model is related to the field of medical instrument technology, more particularly to a kind of compound crusher drill.

Background technology

In some bone surgeries (under such as mirror the construction of minimally invasive spine surgical access perform the operation), it is sometimes desirable to in patient body Bone tissue is ground, and the crusher drill that power handle front end is generally set to by power handle driving rotates to carry out.It is existing Crusher drill generally include bar portion and be set to a spherical or cylindrical abrasive drilling head of the bar portion head end, abrasive drilling is arranged on head There is cutting edge.This crusher drill is in grinding process, because cutter head is constantly in rotary motion, and cutter head relies only on human hand to prop up Support, therefore bounce is easy tod produce, cause the size and Orientation in hole not easy to control.

Invention content

Present situation for the above-mentioned prior art, the utility model provide a kind of size and side that can effectively control and establish via hole To compound crusher drill.

In order to solve the above-mentioned technical problem, a kind of compound crusher drill provided by the utility model, including：Crusher drill sheet Body, the crusher drill ontology include bar portion and the abrasive drilling head being connect with the head end of the bar portion, which has at least one First cutting edge；Further include：Hole saw, the hole saw are fixedly provided on the crusher drill ontology, and are cut positioned at described first The side of the close bar portion of sword, the hole saw and the crusher drill ontology rotation axis having the same, which includes cylinder Shape body portion and it is set at least one second cutting edge of the cylindrical body on first cutting edge one end.

The outer end of second cutting edge rotates the straight of the circle to be formed around the rotation axis in one of the embodiments, Diameter is more than the maximum outside diameter of first cutting edge.

The internal face of the second cutting edge from the cylindrical body extends to peripheral surface in one of the embodiments,.

The cylindrical body is provided at least one on one end of first cutting edge in one of the embodiments, There is lip surface and rear blade surface, the lip surface and the rear blade surface to be crossed to form described second for the cutting portion of a tooth form, the cutting portion Cutting edge.

In one of the embodiments, the lip surface relative to the rotation axis with certain angle to the crusher drill The direction of rotation of ontology rolls oblique.

In one of the embodiments, at least one chip space is provided on the peripheral surface of the cylindrical body.

The chip space extends along the rotation axis direction in one of the embodiments,.

The hole saw and the crusher drill ontology are split structure in one of the embodiments, the hole saw setting Have and is set on the head end of the bar portion with the matched centre bore of the head end of the bar portion, the hole saw fixation.

The centre bore of the hole saw is stepped hole in one of the embodiments, and the end of the bar portion is and described The step of rank hole cooperation, and the anti-rotation knot for preventing the two from mutually rotating is provided between the hole saw and the head end of the bar portion Structure.

First cutting edge is arranged in the circumferential direction of the rotation axis in one of the embodiments, the abrasive drilling Front end chisel edge is additionally provided on the front end face on head.

There is compound crusher drill provided by the utility model abrasive drilling head and hole saw, abrasive drilling head to be punched for preliminary, and Hole saw uses building up by welding pattern, makes up the irregular phenomenon of hole wall of the first cutting edge cutting, to the size of effective control hole The direction and.

Advantageous effect possessed by the utility model additional technical feature will this specification specific embodiment part into Row explanation.

Description of the drawings

Fig. 1 is the dimensional structure diagram of the compound crusher drill in the utility model embodiment；

Fig. 2 is the sectional view of the compound crusher drill in the utility model embodiment；

Fig. 3 is the sectional view of the line A-A along Fig. 2；

Fig. 4 is the dimensional structure diagram of the hole saw in the utility model embodiment；

Fig. 5 is the front view of the hole saw in the utility model embodiment；

Fig. 6 is the side view of the hole saw in the utility model embodiment；

Fig. 7 is the close-up schematic view along Fig. 6 at A；

Fig. 8 is the dimensional structure diagram of the crusher drill ontology in the utility model embodiment.

Reference sign：10, crusher drill ontology；12, bar portion；14, abrasive drilling head；142, the first cutting edge；144, preceding Hold chisel edge；20, hole saw；22, cylindrical body；222, chip space；26, cutting portion；262, lip surface；264, rear blade surface；266, Two cutting edges；28, centre bore.

Specific implementation mode

Below with reference to the accompanying drawings and in conjunction with the embodiments the utility model is described in detail.It should be noted that not rushing In the case of prominent, the feature in following embodiment and embodiment can be combined with each other.

As shown in Figs. 1-3, the compound crusher drill of the utility model in one embodiment includes 10 He of crusher drill ontology Hole saw 20, wherein crusher drill ontology 10 includes bar portion 12 and the abrasive drilling head 14 being connect with the head end of the bar portion 12, the crusher drill Portion 14 has at least one first cutting edge 142；Hole saw 20 is fixedly provided on crusher drill ontology 10, and is located at described first The side of the close bar portion 12 of cutting edge 142, hole saw 20 and 10 rotation axis L having the same of crusher drill ontology are coaxial, The hole saw 20 includes cylindrical body 22 and is set on close described first cutting edge, 142 one end of the cylindrical body 22 extremely Few second cutting edge 266, wherein the second cutting edge 266 can be formed in the end face of 22 one end of cylindrical body, can also shape At the outer periphery in 22 one end of cylindrical body, it is preferable that the second cutting edge 266 is formed in cylindrical body 22 1 as shown in Figs. 1-3 The end face at end.The compound crusher drill of the utility model has abrasive drilling head 14 and hole saw 20, and abrasive drilling head 14 is for tentatively beating Hole, and hole saw 20 uses building up by welding pattern, makes up the irregular phenomenon of hole wall of the first cutting edge 142 cutting, to effectively control The size of drilling and direction.

Preferably, the outer end (one end i.e. far from rotation axis L) of second cutting edge 266 is around the rotation axis L The diameter of a circle that rotation is formed is more than the maximum outside diameter of first cutting edge 142.In this way, the hole of the first cutting edge 142 cutting Diameter is less than the aperture of the second cutting edge 266 cutting, and 142 hole of the first cutting edge can be corrected by allowing the second cutting edge 266 to participate in cutting Diameter.

As shown in figs. 4-7, in the present embodiment, second cutting edge 266 extends from the internal face of the cylindrical body 22 To peripheral surface, such stock-removing efficiency is higher.

As shown in figs. 4-7, in the present embodiment, along the cutting portion 26 for being provided at least one tooth form, this cuts the peripheral edge Cutting portion 26, there is lip surface 262 and rear blade surface 264, the lip surface 262 and the rear blade surface 264 to be crossed to form second cutting Sword 266.Preferably, the lip surface 262 relative to the rotation axis L with certain angle to the crusher drill ontology 10 Direction of rotation tilts, and such stock-removing efficiency is higher.

As shown in Figure 4,5, in the present embodiment, chip space 222 is provided on the peripheral surface of the hole saw 20, the chip space 222 between two neighboring second cutting edge 266.Preferably, the chip space 222 is along the directions the rotation axis L Extend.Abrasive drilling head 14 and hole saw 20 cut the bone bits that bone tissue generates and are discharged by chip space 222.

In order to facilitate processing, the hole saw 20 and the crusher drill ontology 10 in the present embodiment are split structure, institute It states hole saw 20 and is provided with and be set in the bar portion 12 with the matched centre bore 28 of the head end of the bar portion 12, the hole saw 20 Head end on, and the two is fixed together by welding.Preferably, the centre bore 28 of the hole saw 20 is stepped hole, described The end of bar portion 12 is the step coordinated with the stepped hole, and is arranged between the hole saw 20 and the head end of the bar portion 12 There is the anti-rotation structure for preventing the two from mutually rotating.As shown in figure 3, in the present embodiment, the cross section of the head end of bar portion 12 is flat, The cross section of the centre bore 28 of hole saw 20 is the flat to match with the head end of bar portion 12, forms anti-rotation structure.When 20 sets of hole saw When being located at the head end of bar portion 12, the two mutually rotation can be prevented.

As shown in figure 8, first cutting edge 142 is arranged in the circumferential direction of the rotation axis, the abrasive drilling head 14 Front end face on be additionally provided with front end chisel edge 144, front end chisel edge 144 can enhance crusher drill top cut efficiency.

Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed, But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to In the scope of protection of the utility model.

Claims (10)

1. a kind of compound crusher drill, including：

Crusher drill ontology, the crusher drill ontology include bar portion and the abrasive drilling head being connect with the head end of the bar portion, the abrasive drilling head With at least one first cutting edge；

It is characterized in that, further including：

Hole saw, the hole saw are fixedly provided on the crusher drill ontology and positioned at first cutting edge close to the bar portion Side, the hole saw and the crusher drill ontology rotation axis having the same, which includes cylindrical body and is set to this At least one second cutting edge of the cylindrical body on first cutting edge one end.

2. compound crusher drill according to claim 1, which is characterized in that the outer end of second cutting edge is around the rotation Axis rotates the maximum outside diameter that the diameter of a circle to be formed is more than first cutting edge.

3. compound crusher drill according to claim 1, which is characterized in that second cutting edge is from the cylindrical body Internal face extends to peripheral surface.

4. compound crusher drill according to claim 1, which is characterized in that the cylindrical body is close to first cutting edge One end on be provided with the cutting portion of at least one tooth form, which has lip surface and a rear blade surface, the lip surface and this after Blade surface is crossed to form second cutting edge.

5. compound crusher drill according to claim 4, which is characterized in that the lip surface relative to the rotation axis with Certain angle rolls oblique to the direction of rotation of the crusher drill ontology.

6. compound crusher drill according to claim 1, which is characterized in that be provided on the peripheral surface of the cylindrical body to A few chip space.

7. compound crusher drill according to claim 6, which is characterized in that the chip space prolongs along the rotation axis direction It stretches.

8. compound crusher drill as claimed in any of claims 1 to 7, which is characterized in that the hole saw and the mill Drill body is split structure, and the hole saw is provided with to be consolidated with the matched centre bore of the head end of the bar portion, the hole saw Surely it is set on the head end of the bar portion.

9. compound crusher drill according to claim 8, which is characterized in that the centre bore of the hole saw is stepped hole, described The end of bar portion is the step coordinated with the stepped hole, and is provided with and prevents between the hole saw and the head end of the bar portion The anti-rotation structure that the two mutually rotates.

10. compound crusher drill according to claim 1, which is characterized in that first cutting edge is arranged in the rotation In the circumferential direction of axis, front end chisel edge is additionally provided on the front end face on the abrasive drilling head.