CN211135647U

CN211135647U - Short and small thin drill bit extension device for easy-interference machining surface

Info

Publication number: CN211135647U
Application number: CN201921901912.0U
Authority: CN
Inventors: 张志恒; 师勇; 安跃军; 李明
Original assignee: Dalian Jinshi Pump Co ltd
Current assignee: Dalian Jinshi Pump Co ltd
Priority date: 2019-11-06
Filing date: 2019-11-06
Publication date: 2020-07-31
Anticipated expiration: 2029-11-06

Abstract

The utility model provides a short and small thin drill bit extension fixture for easy interference machined surface, belongs to the mechanical design field, the device includes drilling machine feed box, drilling machine main shaft non-rotation shaft section, top retaining member etc, drilling machine feed box bottom is equipped with drilling machine main shaft non-rotation shaft section, drilling machine main shaft non-rotation shaft section outside is equipped with the fixed hoop in top, the below of drilling machine main shaft non-rotation shaft section is equipped with drilling machine main shaft rotation section, the extension axle links to each other with the drill bit fastener through the drilling machine main shaft with drilling machine main shaft rotation section, the extension axle outside is equipped with the shell, extension axle lower part is equipped with short and small thin drill bit, short and small thin drill bit outside is equipped with flexible armour, flexible armour is scalable for short and small thin drill bit. An object of the utility model is to realize the extension of short and small thin drill bit to the further processing that is used for the easy processing face of interfering, in order to avoid the hidden danger that drill bit fracture, broken end splash simultaneously, provide a short and small thin drill bit extension fixture that is used for the easy processing face of interfering.

Description

Short and small thin drill bit extension device for easy-interference machining surface

Technical Field

The utility model belongs to the mechanical design field relates to a short and small thin drill bit extension fixture that is used for easy interference machined surface.

Background

The appearance of machining equipment such as drilling machines, lathes, planing machines, milling machines, boring machines and the like fully meets the machining requirements of the machining industry on parts with various appearance structures. The drilling machine is a universal machine tool with wide application, and can be used for drilling, reaming plane, tapping and the like on parts.

Fig. 1 shows a typical part to be machined (hereinafter referred to as "part to be machined") having an easily interfered machining surface 17, and the part to be machined 16 is an easily interfered machining surface of a part to be machined, and a plurality of small-bore through holes or grooves need to be drilled in the part 16. Chinese patent publication No.: CN204413233U, announcement date: 24.6.2015, a simple drill bit extension structure is disclosed, a drill handle of the structure is inserted into a mounting hole with the diameter of phi 6mm at the front end part of an extension rod, the processing requirement of an exhaust hole of a special part can be met, dryness and astringency with a workpiece cannot occur, the drill bit extension structure is wear-resistant and not easy to deform, rigidity required in a drilling process is guaranteed, the service life is long, and the investment cost is low. However, the mechanical reliability of the short and small drill bits can be affected by simply extending the drill bits, and the danger of drill bit breakage and head breakage splashing is very easy to occur in the process of drilling deep and lifting the drill bits, so that the production is affected and the danger is generated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to realize the extension of short and small thin drill bit to the further processing that is used for the easy processing face of interfering, in order to avoid the hidden danger that drill bit fracture, broken end splash simultaneously, provide a short and small thin drill bit extension fixture that is used for the easy processing face of interfering.

The utility model provides a technical scheme is:

a short and small thin drill bit extension device for an easily interfered machining surface comprises a drilling machine feeding box, a drilling machine spindle non-rotating shaft section, a top locking part, a top fixing hoop, a drilling machine spindle rotating section, a shell, a bearing, an extension shaft, a telescopic armor and a short and small thin drill bit, wherein the drilling machine spindle non-rotating shaft section is arranged at the bottom of the drilling machine feeding box, the top fixing hoop is arranged outside the drilling machine spindle non-rotating shaft section, the drilling machine spindle rotating section is arranged below the drilling machine spindle non-rotating shaft section, the extension shaft and the drilling machine spindle rotating section are connected with the drill bit fastener through the drilling machine spindle, the shell is arranged outside the extension shaft, the top of the shell is connected with the top fixing hoop, the bearing is arranged between the middle part of the extension shaft and the shell at a corresponding position, the short and small thin drill bit is arranged at the lower part of the extension shaft, the short, the telescopic armor is telescopic relative to short and small thin drill bits.

Preferably, a spring is arranged between the top of the telescopic armor and the bottom of the shell, and the spring is sleeved outside the telescopic armor.

Preferably, the lower end of the telescopic armor is higher than the lower end of the short and small drill bit when the spring is in a non-compressed state.

Preferably, a gap is left between the inner side of the upper end of the telescopic armor and the outer side of the lower end of the extension shaft.

Preferably, the middle outer side of the extension shaft is provided with a bearing inner ring, the shell is arranged at a position corresponding to the outer shell, the inner side of the rotating shaft is provided with a bearing outer ring, and the rotating shaft inner ring and the rotating shaft outer ring jointly form a bearing.

Preferably, the lower end of the extension shaft is provided with a mounting hole for a short and thin drill bit, and the middle part of the mounting hole is provided with a short and thin drill bit fastening piece.

Preferably, the side of the drilling machine feed box is provided with a drilling machine rocker.

Preferably, the telescopic armor is in a cylindrical shape matched with a short and small drill bit.

Compared with the prior art, the utility model discloses an advantage does with the effect: the utility model provides a short and small thin drill head extension fixture that is used for easy interference machined surface with flexible armour, the device can be firmly reliable install on current drilling machine, realizes the reliable extension of short and small thin drill head, adds in the outside of short and small thin drill head simultaneously and is equipped with flexible armour, reliably has avoided the danger that the drill head that probably takes place splits, the broken end splashes, and the processing application scope of part and operator's safety are treated in the protection, the current drilling machine of widen.

Drawings

Figure 1 is the utility model relates to a short and small thin drill bit extension fixture for easy interference machined surface.

In the attached figure 1: 1. drilling machine feed box, 2, the drilling machine rocker, 3, drilling machine main shaft non-rotation shaft section, 4, the top retaining member, 5, top shoulder junction retaining member, 6, the fixed hoop in top, 7, drilling machine main shaft rotation section, 8, drilling machine main shaft and drill bit fastener, 9, the shell, 10, the bearing, 11, the extension axle, 12, the spring, 13, short and small thin drill bit retaining member, 14, flexible armour, 15, short and small thin drill bit, 16, typical easy interference machined surface, 17, wait to process the part.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings.

The utility model relates to a short and small thin drill bit extension fixture that is used for easy interference machined surface with flexible armour, the device comprises top retaining member, the fixed hoop in top shoulder junction retaining member, top, shell, bearing, extension axle, spring, short and small thin drill bit retaining member, flexible armour.

The joint locking piece of the top locking piece and the top shoulder part has a locking function, can be of an existing structure, and only needs to have the detachable and lockable functions; the fastener is mounted on a top clamp which is mounted to the non-rotating section of the drill spindle to ensure that the entire top clamp is securely fastened to the non-rotating section of the drill spindle.

The shell is reliably connected with the top fastening hoop through the retaining member at the joint of the top shoulder part so as to ensure that the shell and the top fastening hoop are connected into a whole, a spring is welded at the bottom of the shell, and a telescopic armor is welded at the lower end of the spring.

The upper end of the extension shaft is fastened to the center of a drilling machine spindle and a drill bit fastener, a bearing inner ring is mounted on the outer side of the middle of the extension shaft, a bearing outer ring is arranged on the rotating shaft inner ring, the rotating shaft inner ring and the rotating shaft outer ring jointly form a bearing, a mounting hole for a short and small drill bit is formed in the lower end of the extension shaft, and the short and small drill bit fastener is arranged in the middle of the mounting hole.

The upper end of flexible armour is connected in the lower extreme of spring, there is the clearance in the inboard of flexible armour upper end and the lower extreme outside of extension axle, under the spring non-compression state, the lower extreme of flexible armour is a little higher than the lower extreme of short and small thin drill bit.

Example 1

Referring to fig. 1, a short and small drill bit extension device with a telescopic armor for an easily interfered machining surface is shown, and in order to facilitate description of the present invention, a part of the structure of a drill is shown in fig. 1. The upper end of the extension shaft 11 is inserted into the drilling machine spindle and the drill bit fastening piece 8 to fasten the drilling machine spindle and the drill bit fastening piece 8, and the upper end of the extension shaft 11 is reliably fastened in the drilling machine spindle and the drill bit fastening piece 8. The drilling spindle and bit fastener 8 construction is prior art.

The top fixing hoop 6 is sleeved on the non-rotating shaft section 3 of the drilling spindle, the whole top fastening hoop 6 is reliably fastened on the non-rotating shaft section 3 of the drilling spindle by fastening the top locking piece 4, and the shell 9 is further reliably connected with the top fastening hoop 6 by the top shoulder joint locking piece 5, so that the shell 9 and the top fastening hoop 6 are connected into a whole. The securing top retaining member 4, top shoulder joint retaining member 5 may be a bolt. The connection mode of the non-rotating shaft section 3 of the drilling machine spindle and the rotating section 7 of the drilling machine spindle belongs to the prior art.

The upper end of the short slender drill 15 is inserted into the mounting hole of the lower end of the extension shaft 11, and then the short slender drill 15 is securely fixed in the mounting hole of the lower end of the extension shaft 11 by the short slender drill locking member 13. The short slim drill locking piece 13 may be a screw.

When the short and small drill bit 15 is contacted with the typical easy-interference machining surface 16 of the part 17 to be machined and gradually deepens, the lower end of the telescopic armor 14 is gradually contacted with the typical easy-interference machining surface 16 of the part 17 to be machined, when the short and small drill bit 15 is further deepened, the telescopic armor 14 compresses the spring 12, when the short and small drill bit 15 is completely deepened and extended, the spring 12 pushes the telescopic armor 14 to move downwards under the action of elasticity and restore to an initial state, the telescopic armor 14 can effectively protect the short and small drill bit from being interfered with other parts of the part 17 to be machined in the processes of deepening, extending and moving, and the hidden danger of drill bit breakage and broken-end splashing can be avoided.

In this embodiment, the extension shaft 11 is made of a high-strength steel material, the spring 12 is made of a spring alloy steel, and other components are made of mechanically reliable metal materials, so that the short and thin drill bit can be effectively extended and applied to a machined surface where interference is likely to occur.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A short and small thin drill bit extension fixture for easy interference machined surface which characterized in that: the device comprises a drilling machine feeding box (1), a drilling machine spindle non-rotating shaft section (3), a top locking part (4), a top fixing hoop (6), a drilling machine spindle rotating section (7), a shell (9), a bearing (10), an extension shaft (11), a telescopic armor (14) and a small and small drill bit (15), wherein the drilling machine spindle non-rotating shaft section (3) is arranged at the bottom of the drilling machine feeding box (1), the top fixing hoop (6) is arranged outside the drilling machine spindle non-rotating shaft section (3), the drilling machine spindle rotating section (7) is arranged below the drilling machine spindle non-rotating shaft section (3), the extension shaft (11) and the drilling machine spindle rotating section (7) are connected with the drill bit fastener (8) through the drilling machine spindle, the shell (9) is arranged outside the extension shaft (11), the top of the shell (9) is connected with the top fixing hoop (6), the bearing is arranged between the middle part of the extension shaft (11) and the shell (9) at a, extension axle (11) lower part is equipped with short and small thin drill bit (15), short and small thin drill bit (15) outside is equipped with flexible armour (14), flexible armour (14) are scalable for short and small thin drill bit (15).

2. A short and small drill bit extension device for easily interfered machining surfaces according to claim 1, wherein: be equipped with spring (12) between flexible armour (14) top and shell (9) bottom, the outside of flexible armour (14) is located to spring (12) cover.

3. A short and small drill bit extension device for easily interfered machining surfaces according to claim 2, wherein: the lower end of the telescopic armor (14) is higher than the lower end of the short and thin drill bit (15) when the spring (12) is in a non-compressed state.

4. A short and small drill bit extension device for easily interfered machining surfaces according to claim 2, wherein: a gap is reserved between the inner side of the upper end of the telescopic armor (14) and the outer side of the lower end of the extension shaft (11).

5. A short and small drill bit extension device for easily interfered machining surfaces according to claim 1, wherein: the middle outer side of the extension shaft (11) is provided with a bearing inner ring, the shell (9) is arranged at a corresponding position, the inner side of the rotating shaft is provided with a bearing outer ring, and the bearing is formed by the rotating shaft inner ring and the rotating shaft outer ring together.

6. A short and small drill bit extension device for easily interfered machining surfaces according to claim 1, wherein: the lower end of the extension shaft (11) is provided with a mounting hole of a short and small drill bit, and the middle part of the mounting hole is provided with a short and small drill bit fastening piece.

7. A short and small drill bit extension device for easily interfered machining surfaces according to claim 1, wherein: and a drilling machine rocker (2) is arranged on the side edge of the drilling machine feeding box (1).

8. A short and small drill bit extension device for easily interfered machining surfaces according to claim 1, wherein: the telescopic armor (14) is in a cylindrical shape matched with the short and thin drill bit (15).