CN218015977U - Tool for drilling bottom of blind hole - Google Patents

Abstract

The utility model belongs to the technical field of machining equipment and specifically relates to a frock is used in drilling of blind hole bottom, and it includes upper bearing cap, lower bearing cap, input shaft, drive gear, output gear and drill bit, enclose between upper bearing cap and lower bearing cap and close and form the transmission room, input shaft tip fixed connection input gear, drill bit tip fixed connection output gear, input gear, drive gear and output gear mesh in proper order in the transmission room, and upper bearing cap and lower bearing cap are close to drill bit one side and set up the locating surface, the locating surface is the acute angle with drill bit axis contained angle alpha. The utility model can extend into the blind holes for drilling, and the tool can adapt to blind holes with different depths by adjusting the number of the transmission gears and the sizes of the upper bearing cover and the lower bearing cover; through setting up the locating surface of slope, shorten the frock tip thickness of drill bit one side, prevent that the frock tip from causing the interference when guaranteeing the drill bit normal operating, make the frock can satisfy the through-hole processing of hugging closely the hole bottom.

Description

Tool for drilling bottom of blind hole

Technical Field

The utility model belongs to the technical field of machining equipment and specifically relates to a frock is used in drilling of blind hole bottom.

Background

In the cylinder body course of working, need drill at the lateral wall position of two blind holes and make it link up, as shown in fig. 3, inside need stretch into the blind hole with the drilling tool during drilling, current drilling tool is difficult to satisfy deep hole machining's needs, and partial through-hole design is close to the position of hole bottom at the blind hole lateral wall simultaneously, and when drilling tool end structure's thickness was greater than the distance of through-hole and hole bottom, can make end structure cause the interference, leads to unable processing according to the design. In the existing production, the through hole machining can be carried out only by using an electric spark machining mode, but the mode has low efficiency and unstable machining quality and is not suitable for mass production.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the above problem, a frock is used in drilling of blind hole bottom is provided, the technical scheme of its adoption as follows:

the utility model provides a blind hole is frock for bottom drilling, includes upper bearing cap, lower bearing cap, input shaft, drive gear, output gear and drill bit, enclose between upper bearing cap and the lower bearing cap and close and form the transmission room, input shaft tip fixed connection input gear, drill bit tip fixed connection output gear, input gear, drive gear and output gear mesh in proper order in the transmission room, and upper bearing cap and lower bearing cap are close to drill bit one side and set up the locating surface, the locating surface is the acute angle with drill bit axis contained angle alpha.

On the basis of the scheme, the upper bearing cover is connected with the fixed cover in a butting mode on one side of the lower bearing cover, the lower bearing cover is connected with the fixed plate in a butting mode on one side of the upper bearing cover, and the fixed cover is connected with the fixed plate through the fixed bolt.

On the basis of the scheme, the input shaft penetrates through the upper bearing cover and then is arranged in the fixed sleeve, and the drill bit penetrates through the lower bearing cover.

Preferably, a wear-resistant bearing is arranged between the output gear and the lower bearing cover.

Preferably, the number of the transmission gears is multiple, and the number is set according to the depth of the blind hole.

The utility model has the advantages that: the tool can extend into the blind holes for drilling, and can adapt to the blind holes with different depths by adjusting the number of the transmission gears and the sizes of the upper bearing cover and the lower bearing cover; the thickness of the end part of the tool at one side of the drill bit is shortened by arranging the inclined positioning surface, so that the interference of the end part of the tool is prevented while the normal operation of the drill bit is ensured, and the tool can meet the requirement of processing a through hole tightly attached to the bottom of the hole; through fixed cover of bolted connection and fixed plate, can conveniently accomplish the fastening and the dismantlement of upper bearing cap and lower bearing cap, improve the structural strength of frock simultaneously.

Drawings

FIG. 1: the utility model has a schematic structure;

FIG. 2: the bottom structure of the utility model is schematically shown;

FIG. 3: the cylinder and the through hole to be processed are schematically shown in the structure.

Detailed Description

The invention will be further described with reference to the following drawings and examples:

in the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it is to be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1 and fig. 2, a blind hole bottom drilling tool comprises an upper bearing cover 21, a lower bearing cover 22, an input shaft 31, a transmission gear 33, an output gear 34 and a drill bit 36, wherein a transmission chamber 23 is formed between the upper bearing cover 21 and the lower bearing cover 22 in a surrounding manner, the upper bearing cover 21 is far away from the fixed sleeve 11 in a butt manner on one side of the lower bearing cover 22, the lower bearing cover 22 is far away from the fixed plate 12 in a butt manner on one side of the upper bearing cover 21, the fixed sleeve 11 is connected with the fixed plate 12 through a fixing bolt 13, so that the fastening and the dismounting of the upper bearing cover and the lower bearing cover are conveniently completed, and the structural strength of the tool is improved. The input shaft 31 is disposed in the fixed sleeve 11 after passing through the upper bearing cap 21, and the bit 36 passes through the lower bearing cap 22. The end part of the input shaft 31 is fixedly connected with an input gear 32, the end part of the drill bit 36 is fixedly connected with an output gear 34, the input gear 32, the transmission gears 33 and the output gear 34 are sequentially meshed in the transmission chamber 23, the number of the transmission gears 33 is multiple, the number of the transmission gears is set according to the depth of blind holes, and the transmission gears are matched with the upper bearing cover 21 and the lower bearing cover 22 with different sizes to adapt to different depths of the blind holes. A wear bearing 35 is provided between the output gear 34 and the lower bearing cap 22 to improve wear resistance at the connection position. The upper bearing cover 21 and the lower bearing cover 22 are provided with a positioning surface 24 on one side close to the drill bit 36, and an included angle alpha between the positioning surface 24 and the axis of the drill bit 36 is an acute angle. The locating surface 24 is parallel with the bottom surface of the blind hole during drilling, the drill bit 36 is gradually close to the bottom surface during drilling, so that the finished through hole is attached to the bottom surface as much as possible, the design requirements are met, meanwhile, the bottom surface is not damaged during drilling by controlling the angle of the included angle alpha, and the strength of the bottom surface of the cylinder barrel is ensured.

The present invention has been described above by way of example, but the present invention is not limited to the above-mentioned embodiments, and any modification or variation based on the present invention is within the scope of the present invention.

Claims (5)

1. The utility model provides a blind hole is frock for bottom drilling, its characterized in that includes upper bearing cap (21), lower bearing cap (22), input shaft (31), drive gear (33), output gear (34) and drill bit (36), enclose between upper bearing cap (21) and lower bearing cap (22) and close formation transmission room (23), input shaft (31) tip fixed connection input gear (32), drill bit (36) tip fixed connection output gear (34), input gear (32), drive gear (33) and output gear (34) mesh in proper order in transmission room (23), and upper bearing cap (21) and lower bearing cap (22) are close to drill bit (36) one side and set up locating surface (24), locating surface (24) are the acute angle with drill bit (36) axis contained angle alpha.

2. The tool for drilling the bottom of the blind hole as claimed in claim 1, wherein one side of the upper bearing cover (21) far away from the lower bearing cover (22) is abutted to the fixing sleeve (11), one side of the lower bearing cover (22) far away from the upper bearing cover (21) is abutted to the fixing plate (12), and the fixing sleeve (11) is connected with the fixing plate (12) through the fixing bolt (13).

3. The tool for drilling the bottom of the blind hole as claimed in claim 2, wherein the input shaft (31) penetrates through the upper bearing cover (21) and then is arranged in the fixing sleeve (11), and the drill bit (36) penetrates through the lower bearing cover (22).

4. The tool for drilling the bottom of the blind hole according to claim 1, wherein a wear-resistant bearing (35) is arranged between the output gear (34) and the lower bearing cover (22).

5. The tool for drilling the bottom of the blind hole is characterized in that the number of the transmission gears (33) is multiple and is set according to the depth of the blind hole.

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