Power tool apron of high-rigidity tool turret

Abstract

The power tool apron of the high-rigidity tool turret comprises a main shaft cavity formed by covering a front door cover and a box body and a main shaft penetrating through the main shaft cavity, the two ends of the main shaft extend out of the main shaft cavity, one end of the main shaft forms a power output end connected with a tool chuck, and the other end of the main shaft forms a power input end. The main shaft comprises a first step section, a second step section, a first threaded section, a third step section and a second threaded section which are arranged in sequence; a first single-row tapered roller bearing and a second single-row tapered roller bearing are respectively sleeved between the main shaft cavity and the first step section and between the main shaft cavity and the second step section, a space ring assembly is arranged between the first cylindrical roller and the second cylindrical roller, and a first nut is screwed on the first threaded section, so that the second single-row tapered roller bearing, the space ring assembly and the first single-row tapered roller bearing are sequentially propped against one another; a plurality of deep groove ball bearings are arranged between the main shaft cavity and the third step section in a sleeved mode, and a second nut is screwed on the second threaded section so that the deep groove ball bearings can abut against one another in sequence. The structure is compact, small and exquisite, stable in operation, high in bearing capacity and high in rigidity.

Description

TECHNICAL FIELD

[0001] The utility model relates to power tool holder technical field especially relates to a high rigidity tool turret's power tool holder. BACKGROUND

[0002] Workpiece on numerical control lathe some milling or drilling process cannot be completed, lead to workpiece error increase, processing efficiency is low etc. problem. In order to solve these problems, produced by power tool holder on power tool turret and C shaft function cooperation, complete workpiece's milling, drilling, tapping etc. function.

[0003] The patent number ZL201821064512.4 of China discloses a kind of axial power tool holder for turning-milling combined machining center, mainly including tool holder body, main shaft assembled in the inner hole of tool holder body and tail joint fixed to the end of the tool holder body;The main shaft is externally sleeved with bearing, the bearing is contacted with the step in the inner hole of the tool holder body, and the bearing is locked on the main shaft from inside by lock nut;The main shaft is fixed to the tool holder body by flange cover.In the above structure, bearing is usually angular contact ball bearing, expensive and structure bearing capacity and rigidity are not enough. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problems in the above, and provides a kind of power tool holder of high rigidity tool turret.

[0005] The technical scheme of the utility model is:

[0006] The power tool holder of high rigidity tool turret described in the utility model, including the main shaft cavity formed by the front door cover and the box cover, the main shaft through the main shaft cavity, the main shaft both ends are externally extended from the main shaft cavity, one end forms the power output end connected tool holder, the other end forms power input end, characterized in that: the main shaft includes the first stage, the second stage, the first thread section, the third stage, the second thread section that first power output end is sequentially arranged to power input end direction;First single-row tapered roller bearing is sleeved between the main shaft cavity and the first stage, second single-row tapered roller bearing is sleeved between the main shaft cavity and the second stage, first single-row tapered roller bearing and second single-row tapered roller bearing are also equipped with spacer assembly between, first nut is screwed on the first thread section so that second single-row tapered roller bearing, spacer assembly, first single-row tapered roller bearing are sequentially abutted;A plurality of deep groove ball bearings are sleeved between the main shaft cavity and the third stage, adjusting washer is also equipped between deep groove ball bearing and the third stage, second nut is screwed on the second thread section so that a plurality of deep groove ball bearings, adjusting washer are sequentially abutted.

[0007] This structure adopts the form of coaxial arrangement of power input and output ends, which is reasonable, compact and small in size. In addition, a bearing support structure composed of single-row tapered roller bearings and deep groove ball bearings is adopted at both ends of the main shaft, which significantly improves the load-bearing capacity and rigidity of the main shaft, better bears the radial and axial forces during operation, operates stably and reliably, greatly extends the service life, and has low manufacturing costs.

[0008] Furthermore, in the power tool holder of the high-rigidity turret described in the present invention, the outer diameters of the first stage, the second stage, and the third stage decrease step by step, so that the spindle, bearings and other components can be installed quickly, and the installation flexibility is high.

[0009] Furthermore, in the power tool holder of the high-rigidity turret described in the utility model, the spacer assembly includes a first inner spacer, a second inner spacer, and an outer spacer. The first inner spacer and the second inner spacer are axially sleeved on the second stage, and the inner ring of the second single-row tapered roller bearing, the second inner spacer, the first inner spacer, and the inner ring of the first single-row tapered roller bearing are tightened by a first nut; the outer spacer is simultaneously sleeved outside the first inner spacer and the second inner spacer, and the outer ring of the second single-row tapered roller bearing, the outer spacer, and the outer ring of the first single-row tapered roller bearing are tightened by a first nut.

[0010] Furthermore, in the power tool holder of the high-rigidity turret described in the present invention, a cooling cavity is formed around the box body and the outer spacer, and the box body is provided with a first axial hole and a radial hole, and the radial hole passes through the outside of the box body to connect to the cooling cavity and is connected to the first axial hole; a second axial hole is provided on the front door cover, one end of the second axial hole is connected to the first axial hole, and the other end is connected to a water spray seat, and the water spray seat is located on the side of the power output end, and is used to cool the tool chuck, and at the same time, the cooling of the spindle is achieved through the cooling cavity surrounding the spindle.

[0011] Furthermore, in the power tool holder of the high-rigidity turret described in the present invention, two sealing rings are provided between the box body and the outer spacer ring, and the sealing rings are respectively located on both axial sides of the cooling cavity to prevent coolant leakage from both axial sides.

[0012] Furthermore, in the power tool holder of the high-rigidity turret described in the present invention, a first oil seal is provided between the main shaft and the front door cover, and a second oil seal is provided between the second nut and the box body, and the sealing effect is good.

[0013] Furthermore, in the power tool holder of the high-rigidity turret described in the present invention, the power output end is detachably connected to a flat head cover.

[0014] Furthermore, in the power tool holder of the high-rigidity turret described in the present invention, the first single-row tapered roller bearing and the second single-row tapered roller bearing are assembled back-to-back. This installation method can better withstand axial and radial loads, allowing the bearings to maintain better stability when subjected to force.

[0015] The beneficial effects of the utility model are:

[0016] The utility model adopts a coaxial arrangement of the power input and output ends, and the main shaft adopts a support structure that combines a back-to-back single-row tapered roller bearing group at one end and a deep groove ball bearing group at the other end, which effectively improves the stability of the main shaft support and has greater rigidity. At the same time, it makes the main shaft structure more compact, the operation is stable, and the cost is low.

[0017] The utility model has a good water cooling effect. By arranging the water spray seat on one side of the power output end to spray and cool the tool, the heat of the tool is quickly transferred, and efficient cooling of the tool is achieved. At the same time, combined with the cooling cavity surrounding the main shaft, synchronous cooling of the main shaft is achieved, thereby extending the overall service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 It is a cross-sectional schematic diagram of the present utility model.

[0020] Figure 3 This is a schematic diagram of the disassembly of the present utility model. DETAILED DESCRIPTION

[0021] The present invention will now be further described with reference to the accompanying drawings:

[0022] Reference Figure 1 、 Figure 2 and Figure 3 As shown, the power tool holder of the high-rigidity turret described in this embodiment includes a spindle cavity formed by the front door cover 1 and the box body 2, and a spindle 3 passing through the spindle cavity. Both ends of the spindle 3 extend out of the spindle cavity, one end forms a power output end connected to the tool chuck, and the other end forms a power input end. The power output end is detachably connected to a flat head cover 15.

[0023] The main shaft 3 includes a first stage 301, a second stage 302, a first thread segment 303, a third stage 304, and a second thread segment 305, which are arranged in sequence from the power output end to the power input end; the outer diameters of the first stage 301, the second stage 302, and the third stage 304 decrease step by step.

[0024] A first single-row tapered roller bearing 4 is sleeved between the main shaft cavity and the first stage 301, and a second single-row tapered roller bearing 5 is sleeved between the main shaft cavity and the second stage 302. A spacer assembly is also provided between the first single-row tapered roller bearing 4 and the second single-row tapered roller bearing 5. A first nut 9 is screwed on the first threaded section 305 to tighten the second single-row tapered roller bearing 5, the spacer assembly, and the first single-row tapered roller bearing 4 in sequence; the first single-row tapered roller bearing 4 and the second single-row tapered roller bearing 5 are assembled back to back. Specifically, the spacer assembly includes a first inner spacer 6, a second inner spacer 7, and an outer spacer 8. The first inner spacer 6 and the second inner spacer 7 are axially sleeved on the second stage 302, and the inner ring of the second single-row tapered roller bearing 5, the second inner spacer 7, the first inner spacer 6, and the inner ring of the first single-row tapered roller bearing 4 are tightened by the first nut 9; the outer spacer 8 is simultaneously sleeved outside the first inner spacer 6 and the second inner spacer 7, and the outer ring of the second single-row tapered roller bearing 5, the outer spacer 8, and the outer ring of the first single-row tapered roller bearing 4 are tightened by the first nut 9.

[0025] A plurality of deep groove ball bearings 11 are sleeved between the main shaft cavity and the third stage 304, and an adjusting washer 10 is also provided between the deep groove ball bearing 11 and the third stage 304. A second nut 12 is screwed on the second threaded section 305 to tighten the plurality of deep groove ball bearings 11 and the adjusting washer 10 in sequence.

[0026] A first oil seal 13 is provided between the main shaft 3 and the front door cover 1 , and a second oil seal 14 is provided between the second nut 12 and the box body 2 .

[0027] At the same time, this embodiment also designs a good water cooling structure, specifically combined with Figure 2 and Figure 3 The description is as follows. A cooling cavity 16 is formed around the housing 2 and the outer spacer 8. The housing 2 is provided with a first axial hole 201 and a radial hole 202. The radial hole 202 passes through the outside of the housing 2 and is connected to the cooling cavity 16 and is connected to the first axial hole 201. The front door cover 1 is provided with a second axial hole 101. One end of the second axial hole 101 is connected to the first axial hole 201, and the other end is connected to the water spray seat 18. Two sealing rings 17 are provided between the housing 2 and the outer spacer 8. The sealing rings 17 are respectively located on both axial sides of the cooling cavity 16. On the one hand, the coolant flows into the cooling cavity 16 from the radial hole 202 to achieve surround cooling of the spindle 3. It can also be sprayed from the radial hole 202 through the first axial hole 201 and the second axial hole 101 to the tool side by the water spray seat 18, thereby achieving rapid cooling of the tool.

[0028] During installation, the first oil seal 13, front door cover 1, first single-row tapered roller bearing 4, first inner spacer 6, second inner spacer 7, outer spacer 8, second single-row tapered roller bearing 5, and first nut 9 are sequentially inserted into the main shaft 3 and tightened with the first nut 9. After two sealing rings 17 are inserted onto the outer spacer 8, the main shaft 3 is inserted into the housing 2. Then, from the power output end, the adjusting washer 10 and multiple deep-groove ball bearings 11 are sequentially inserted and tightened with the second nut 12. Finally, the second oil seal 14 and flat head cover 15 are installed. This structure creates a coaxial power input and output arrangement, with the two ends of the main shaft 3 rotatably connected to the main shaft cavity via back-to-back single-row tapered roller bearings and deep-groove ball bearings, respectively. This provides low cost, compact structure, high rigidity, stable operation, and easy installation and disassembly.

[0029] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit this utility model. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, any equivalent modifications or alterations made by a person skilled in the art without departing from the spirit and technical concepts disclosed in this utility model are encompassed by the claims of this utility model.

Claims

1. The power tool holder of the high-rigidity turret includes a spindle cavity formed by the front door cover and the box body, and a spindle that passes through the spindle cavity. Both ends of the spindle extend out of the spindle cavity, one end forms a power output end connected to the tool chuck, and the other end forms a power input end. The characteristics are: The main shaft includes a first stage, a second stage, a first threaded section, a third stage, and a second threaded section, which are arranged in sequence from the power output end to the power input end; a first single-row tapered roller bearing is sleeved between the main shaft cavity and the first stage, a second single-row tapered roller bearing is sleeved between the main shaft cavity and the second stage, and a spacer assembly is also provided between the first single-row tapered roller bearing and the second single-row tapered roller bearing. A first nut is screwed on the first threaded section to tighten the second single-row tapered roller bearing, the spacer assembly, and the first single-row tapered roller bearing in sequence; a plurality of deep groove ball bearings are sleeved between the main shaft cavity and the third stage, and an adjusting washer is also provided between the deep groove ball bearing and the third stage. A second nut is screwed on the second threaded section to tighten the plurality of deep groove ball bearings and the adjusting washer in sequence.

2. The power tool holder of the high-rigidity turret according to claim 1, characterized in that: The outer diameters of the first stage, the second stage and the third stage decrease step by step.

3. The power tool holder of the high-rigidity turret according to claim 1, characterized in that: The spacer assembly includes a first inner spacer, a second inner spacer, and an outer spacer. The first inner spacer and the second inner spacer are axially sleeved on the second stage. The inner ring of the second single-row tapered roller bearing, the second inner spacer, the first inner spacer, and the inner ring of the first single-row tapered roller bearing are tightened by a first nut; the outer spacer is simultaneously sleeved outside the first inner spacer and the second inner spacer, and the outer ring of the second single-row tapered roller bearing, the outer spacer, and the outer ring of the first single-row tapered roller bearing are tightened by a first nut.

4. The power tool holder of the high-rigidity turret according to claim 3, characterized in that: A cooling cavity is formed between the box body and the outer spacer ring. The box body is provided with a first axial hole and a radial hole. The radial hole passes through the outside of the box body and is connected to the cooling cavity and is connected to the first axial hole; a second axial hole is provided on the front door cover, one end of the second axial hole is connected to the first axial hole, and the other end is connected to a water spray seat.

5. The power tool holder of the high-rigidity turret according to claim 3, characterized in that: Two sealing rings are provided between the box body and the outer spacer, and the sealing rings are respectively located on both axial sides of the cooling cavity.

6. The power tool holder of the high-rigidity turret according to claim 1, characterized in that: A first oil seal is provided between the main shaft and the front door cover, and a second oil seal is provided between the second nut and the box body.

7. The power tool holder of the high-rigidity turret according to claim 1, characterized in that: The power output end is detachably connected with a flat head cover.

8. The power tool holder of the high-rigidity turret according to claim 1, characterized in that: The first single-row tapered roller bearing and the second single-row tapered roller bearing are assembled in a back-to-back manner.

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