Cross-shaped grooved eccentric drill

Abstract

The utility model discloses a cross belt groove eccentric drill which comprises a drill rod and a middle shaft arranged on the drill rod, a feeding screw is arranged on the middle shaft, a plurality of cutting edges are arranged on the middle shaft, the cutting edges form a cross drill bit, the lower portion of each cutting edge is located on the circumference of the upper portion of the middle shaft, and the lower portion of each cutting edge is located on the circumference of the lower portion of the middle shaft. And the drill bit is made of an alloy material. According to the utility model, a sharper structure is designed, so that the cutting effect is greatly improved, and the requirement of rapid cutting is better met.

Description

TECHNICAL FIELD

[0001] The utility model relates to eccentric drill technical field especially cross with groove eccentric drill. BACKGROUND

[0002] It is known that eccentric drill bit is a kind of drilling tool used with eccentric drill, and its design feature is that the central axis of drill bit has a certain deviation angle with drilling axis. However, the existing such as the announcement number CN221793303U of Chinese utility model patent discloses a kind of wear resistance eccentric drill, by the blade drill bit made of hard alloy is installed in the head of drill rod, improve the wear resistance, make the head more hard, blade edge more sharp, since two cutting edges, therefore, it is still not sharp enough when cutting, affect the cutting effect, therefore, it is necessary to improve the existing technology. SUMMARY

[0003] (One) technical problem to be solved

[0004] In view of the deficiencies in the prior art, the utility model provides a cross with groove eccentric drill, which is designed to be more sharp, greatly improves the cutting effect, and is more conducive to meeting the requirement of rapid cutting.

[0005] (Two) technical scheme to be taken

[0006] In order to achieve the above purpose, the technical scheme adopted by the utility model is:

[0007] A cross with groove eccentric drill, comprising drill rod and middle shaft arranged on the drill rod, feed screw is arranged on the middle shaft, a plurality of cutting edges are arranged on the middle shaft, the plurality of cutting edges form a cross-shaped drill bit, and the lower part of each cutting edge is located on the upper circumference of the middle shaft, and the drill bit is made of alloy material.

[0008] Preferably, the plurality of cutting edges are four, and the four cutting edges can better form the cross-shaped drill bit.

[0009] Preferably, a groove is arranged on each cutting edge.

[0010] Preferably, two grooves are arranged on each cutting edge.

[0011] Preferably, a transition part is arranged between the middle shaft and the drill rod, and the transition part is in the form of circular arc.

[0012] Preferably, the drill rod is in the form of hexagon, and at least one recess groove is arranged on the drill rod.

[0013] Preferably, the recess groove is two.

[0014] (Three) technical effects to be achieved

[0015] Compared with the prior art, the utility model has the advantages of:

[0016] First, the utility model discloses a plurality of cutting edges are arranged on the shaft, and the plurality of cutting edges form a cross-shaped drill bit, and the lower part of each cutting edge is located on the upper circumference of the shaft, which not only improves the cutting efficiency and effect, but also makes the cross-shaped drill bit more firm and durable, and greatly improves the service life.

[0017] Second, the drill bit is made of alloy material, which is beneficial to improve the service life and meet the use demand. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The utility model structural schematic diagram is shown.

[0019] Figure 2 The utility model axial drill bit structure schematic diagram is shown.

[0020] Figure 3 The utility model whole schematic diagram is shown.

[0021] Figure 4 The utility model three-dimensional schematic diagram is shown.

[0022] In the drawing: 1, drill rod, 2, shaft, 3, drill bit, 4, transition part, 11, recessed groove, 21, feed screw, 31, recess. DETAILED DESCRIPTION

[0023] In the description of the utility model, it needs to be explained that when an element is called "fixed to" or "arranged to" another element, it can be directly on another element or indirectly on another element. When an element is called "connected to" another element, it can be directly connected to another element or indirectly connected to another element.

[0024] In the description of the utility model, it needs to explain, the term "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and so on the direction or position relation indicated is based on the direction or position relation shown in the drawing, or it is the direction or position relation that the utility model product uses usually places, just is for the convenience of describing the utility model and simplifying the description, and is not the indication or the implied device or element that the indicated device or element must have a particular direction, constructs and operates therefore, therefore can not be understood as the limitation to the utility model. In addition, the term "first", "second", "third" and so on are only used to distinguish the description, and can not be understood as the indication or the implied relative importance. Therefore, the feature that is defined with "first", "second" can be explicit or implicitly include one or more features. In the description of the utility model, the meaning of "a plurality of" is two or two or more, unless otherwise specifically limited. The meaning of "several" is one or more, unless otherwise specifically limited.

[0025] In the description of the utility model, it also needs to explain that, unless otherwise specifically defined and limited, the term "set", "installation", "connection", "connection" should be broad sense, for example, can be fixed connection, can be detachable connection, or integrally connected, can be mechanical connection, can be directly connected, also can be indirectly connected through the intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0026] In order to make the purpose, technical scheme and advantages of the utility model more clear and explicit, the utility model is further described in detail below through the drawings and examples. However, it should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the scope of the utility model. In addition, in the following description, the description of the known structure and technology is omitted to avoid unnecessary confusion of the concept of the utility model.

[0027] Example one: refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4The utility model provides a cross belt groove eccentric drill, including the drill rod 1 and the middle shaft 2 of setting on the drill rod 1, be provided with the feed screw 21 on the middle shaft 2, be provided with multiple cutting edges on the middle shaft 2, and multiple cutting edges form the cross shape drill bit 3, and multiple cutting edges adopt four in this embodiment, four cutting edges can better form the cross shape drill bit 3, are more favorable to cutting drilling, greatly improve cutting efficiency and effect, are more favorable to satisfy use demand, and every cutting edge lower part is located on the middle shaft 2 upper periphery, and this setting greatly improves the structural firmness degree, and the drill bit 3 is made of alloy material, and this also is favorable to improve cutting effect and firmness intensity, is also favorable to improve the service life.

[0028] Example two: can be based on example one, as Figure 1 And Figure 2 Every cutting edge is provided with recess 31, and this is favorable to improve the rapid cooling effect, and improve the service life. In this embodiment, two recesses 31 are provided on each cutting edge. This reasonable setting facilitates implementation.

[0029] Example three: can be based on example one or example two, as Figure 1 , Figure 3 And Figure 4 Transition part 4 is arranged between middle shaft 2 and drill rod 1, and the transition part 4 is in the form of a circular arc. This setting improves the structural firmness.

[0030] Example four: can be based on example one or example two, as Figure 1 , Figure 3 And Figure 4 Drill rod 1 is in the form of a hexagon. This has better overall stability and can resist bending and torsion. At least one recess groove 11 is arranged on the drill rod 1. In this embodiment, two recess grooves 11 are provided. The two recess grooves 11 are more conducive to the secure connection between the drill rod 1 and the external arrangement.

[0031] The standard parts used in this application file can be purchased from the market. The specific connection mode of each part adopts conventional means such as bolts and rivets in existing technology, which will not be described in detail here.

[0032] It should be noted that although the above embodiments have been described in this paper, the patent protection scope of the utility model is not limited thereby. Therefore, based on the innovative concept of the utility model, the changes and modifications of the embodiments described in this paper, or the equivalent structure or equivalent process conversion made by using the contents of the utility model specification and drawings, directly or indirectly apply the above technical solutions to other related technical fields, are all included in the protection scope of the utility model patent.

Claims

1. A cross slot eccentric drill comprising a drill rod (1) and a mandrel (2) provided on the drill rod (1), the mandrel (2) being provided with a feed screw (21), characterized in that: The middle shaft (2) is provided with a plurality of cutting edges, and the plurality of cutting edges form a cross-shaped drill bit (3), and the lower part of each cutting edge is located on the upper circumference of the middle shaft (2), the drill bit (3) is made of alloy material, and the plurality of cutting edges are four, which can better form the cross-shaped drill bit (3), and each cutting edge is provided with a groove (31).

2. The garter slot eccentric as defined in claim 1 wherein: Each of the cutting edges is provided with two grooves (31).

3. A garter slot eccentric drill as claimed in claim 1 or 2 wherein: The transition part (4) is arranged between the middle shaft (2) and the drill rod (1), and the transition part (4) is in the shape of a circular arc.

4. The garter slot eccentric as defined in claim 1 or 2 wherein: The drill rod (1) is in the shape of a hexagon, and the drill rod (1) is provided with at least one recessed groove (11).

5. The garter slot eccentric as defined in claim 4 wherein: The recessed groove (11) is two.

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