Quick-cooling type drilling and tapping main shaft

Abstract

The utility model discloses a quick-cooling type drilling and tapping main shaft which comprises a shell, bearings, a shaft core, a broach rod, a tool holder, an outer space ring, an inner space ring and an internal heat dissipation groove, a plurality of bearings which are coaxially distributed are arranged in the shell, the bearings are coaxially connected with the shaft core, the broach rod is coaxially arranged in the shaft core, and the inner space ring is arranged in the broach rod. A broach handle coaxially connected with the broach rod is arranged at the outer end of the shaft core, an outer space ring is arranged on the inner wall of the shell, an inner space ring is arranged on the outer wall of the shaft core, the outer space ring and the inner space ring are aligned and sleeved between the adjacent bearings in a stacked mode, and a plurality of internal heat dissipation grooves are formed in the surface of the outer space ring. By means of the mode, according to the quick-cooling type drilling and tapping main shaft, the inner heat dissipation grooves are formed in the outer space rings, the outer heat dissipation grooves are formed in the shell, the overall heat dissipation efficiency of the outer space rings and the shell is improved through cooling liquid, accumulated heat energy from the inner space rings of the shaft core is quickly discharged, and the heat dissipation efficiency of the outer space rings and the shell is improved. Therefore, the heat dissipation performance of the spindle is obviously improved and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a drilling and tapping spindle field especially relates to a quick cooling type drilling and tapping spindle. BACKGROUND

[0002] The shaft core of the drilling and tapping spindle produces a large amount of accumulated heat in the high-speed operation process, and the heat cannot be quickly discharged from the inner spacer ring to the outside due to the small heat dissipation area of the shell of the drilling and tapping spindle. Affected by the high-temperature accumulated heat, the shaft core will be deformed, which will reduce the machining accuracy and cause the workpiece to be defective. SUMMARY

[0003] The utility model mainly solves the technical problem to provide a quick cooling type drilling and tapping spindle, set up internal heat dissipation groove on the outer spacer ring, and set up external heat dissipation groove on the shell, improve the overall heat dissipation efficiency of the outer spacer ring and the shell through the cooling liquid, and the accumulated heat energy on the inner spacer ring from the shaft core is quickly discharged, so that the spindle heat dissipation performance is significantly improved, and the service life is prolonged.

[0004] To solve the above technical problems, one technical scheme of the utility model is provided: a quick cooling type drilling and tapping spindle, comprising a shell, a bearing, a shaft core, a broach rod, a handle, an outer spacer ring, an inner spacer ring, an internal heat dissipation groove, the shell is provided with a plurality of coaxially distributed bearings, the bearing is coaxially connected with the shaft core, the shaft core is coaxially provided with the broach rod, the outer end of the shaft core is provided with the handle coaxially connected with the broach rod, the inner wall of the shell is provided with the outer spacer ring, the outer wall of the shaft core is provided with the inner spacer ring, the outer spacer ring and the inner spacer ring are aligned and nested between adjacent bearings, and a plurality of internal heat dissipation grooves are formed on the surface of the outer spacer ring.

[0005] In a preferred embodiment of the utility model, the outer spacer ring is embedded with a sealing ring pressed in the inner wall of the shell at both ends, and the internal heat dissipation groove and the inner wall of the shell form a closed space.

[0006] In a preferred embodiment of the utility model, the internal heat dissipation groove is filled with a cooling liquid.

[0007] In a preferred embodiment of the utility model, a plurality of external heat dissipation grooves are formed on the outer surface of the shell.

[0008] In a preferred embodiment of the utility model, the internal heat dissipation grooves are equally deep and equally spaced.

[0009] The utility model has the beneficial effects that the quick cooling type drilling and tapping spindle provided by the utility model sets up internal heat dissipation groove on the outer spacer ring, and sets up external heat dissipation groove on the shell, improves the overall heat dissipation efficiency of the outer spacer ring and the shell through the cooling liquid, and the accumulated heat energy on the inner spacer ring from the shaft core is quickly discharged, so that the spindle heat dissipation performance is significantly improved, and the service life is prolonged. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0011] Figure 1 This is a structural diagram of a preferred embodiment of a rapid-cooling drilling and tapping spindle of this utility model. Detailed Implementation

[0012] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0013] like Figure 1 As shown, the embodiments of this utility model include:

[0014] A rapid-cooling drilling and tapping spindle includes a housing 1, bearings 2, a spindle core 3, a drawbar 4, a tool handle 5, an outer spacer 6, an inner spacer 7, and internal heat dissipation grooves 8. The housing 1 contains several coaxially distributed bearings 2, with the spindle core 3 coaxially connected to each bearing 2. The drawbar 4 is coaxially disposed within the spindle core 3, and a tool handle 5 coaxially connected to the drawbar 4 is located at the outer end of the spindle core 3. The inner wall of the housing 1 has an outer spacer 6, and the outer wall of the spindle core 3 has an inner spacer 7. The outer spacer 6 and inner spacer 7 are aligned and stacked between adjacent bearings 2. The surface of the outer spacer 6 has several internal heat dissipation grooves 8.

[0015] The outer spacer 6 has sealing rings 9 embedded at both ends, which are pressed against the inner wall of the housing 1. The internal heat dissipation groove 8 and the inner wall of the housing 1 form a closed space.

[0016] Furthermore, the internal heat dissipation groove 8 is filled with coolant.

[0017] Furthermore, the outer surface of the housing 1 is provided with a plurality of external heat dissipation grooves 10.

[0018] Furthermore, the internal heat dissipation grooves 8 are arranged at equal depths and intervals.

[0019] The disc spring is arranged on the pull broach rod 4, the disc spring locks the tool handle 5 on the shaft core 3, the shaft core is connected to the power from the input end, the shaft core 3 rotates at high speed along with the power input, in the high-speed rotating process, the inner partition ring 7 rotates along with the shaft core 3, the heat accumulation of the shaft core 3 diffuses to the inner partition ring 7, the heat accumulation on the inner partition ring 7 diffuses to the outer partition ring 6, the heat accumulation on the outer partition ring 6 is finally transmitted to the shell 1, and the heat is radiated to the environment by the external heat dissipation groove 10 on the surface of the shell 1. Since the shell 1 of the drilling and tapping spindle has limited heat dissipation area, and the shell 1 and the outer partition ring 6 cannot be in good contact due to the gap therebetween, the shell 1 and the outer partition ring 6 simultaneously become the bottleneck of the heat dissipation of the heat accumulation on the inner partition ring 7. In order to solve the problem that the outer partition ring 6 and the shell 1 cannot quickly dissipate heat, the outer partition ring 6 and the shell 1 are respectively provided with two layers of heat dissipation grooves, the heat is quickly transmitted between the outer partition ring 6 and the shell 1 through the cooling liquid, so that the heat dissipation bottleneck is expanded, and the heat accumulation on the inner partition ring 7 is quickly discharged.

[0020] In conclusion, the utility model provides a kind of quick cooling type drilling and tapping spindle, internal heat dissipation groove 8 is set up on outer partition ring 6, and external heat dissipation groove 10 is set up on shell 1, the overall heat dissipation efficiency of outer partition ring 6 and shell 1 is improved by cooling liquid, the heat accumulation on the inner partition ring 7 from shaft core 3 can be quickly discharged, so as to significantly improve the spindle heat dissipation performance, prolong service life.

[0021] The above-mentioned is only the embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process conversion using the utility model specification content, or direct or indirect application in other related technical fields, is also included in the patent protection range of the utility model.

Claims

1. A quick cooling type tapping spindle characterized by comprising: The shell, bearing, shaft core, broach rod, handle, outer spacer ring, inner spacer ring and internal heat dissipation groove are arranged in the shell, the shaft core is coaxially connected with the bearing, the broach rod is coaxially arranged in the shaft core, the handle coaxially connected with the broach rod is arranged at the outer end of the shaft core, the outer spacer ring is arranged on the inner wall of the shell, the inner spacer ring is arranged on the outer wall of the shaft core, the outer spacer ring and the inner spacer ring are arranged in the adjacent bearings, and the outer spacer ring is provided with a plurality of internal heat dissipation grooves.

2. The rapid cooling type tapping spindle according to claim 1, characterized by The outer spacer ring is embedded with a sealing ring pressed in the inner wall of the shell, and the internal heat dissipation groove and the inner wall of the shell form a closed space.

3. The quick cooling type tapping spindle according to claim 1 or 2, characterized in that, The internal heat dissipation groove is filled with cooling liquid.

4. The quill of claim 1 wherein, The outer surface of the shell is provided with a plurality of external heat dissipation grooves.

5. The quill of claim 1 wherein, The internal heat dissipation grooves are arranged at equal depth and equal interval.

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