A motor direct drive tool turret and machine tool

Abstract

The utility model provides a kind of motor direct drive's tool turret and machine tool, belong to machine tool equipment field.Tool turret specifically includes stand, power component fixed on stand and tool disc driven by power component;Power component includes direct drive motor and rotation shaft coaxially connected by bearing with direct drive motor, one end of rotation shaft is power output end and other end is assembly end, bearing inner shaft sleeve of bearing is arranged in assembly end of rotation shaft;Its characterized in that, still include locking assembly, locking assembly is fixedly installed on assembly end of rotation shaft to make bearing inner shaft with motor rotor of direct drive motor assembly connection, and locking assembly and rotation shaft form radial stop fit connection between it.The application is by locking assembly bearing inner shaft and motor rotor press tightly assembly, ensure that power component has reliable fixed assembly structure between direct drive motor and rotation shaft through bearing in working process, and assembly operation is simple.

Description

Technical Field

[0001] This utility model relates to the field of machine tool equipment technology, and in particular to a motor-driven turret and machine tool. Background Technology

[0002] The turret is a core component of a CNC machine tool, mainly consisting of a column, a motor fixed to the column, a rotating shaft connected to the motor via bearings, and a tool head fixed to the end of the rotating shaft. Multiple mounting surfaces and slots are arranged on the circumference of the tool head for fixing turning tool holders or boring tool holders. Through precise motor control, the motor drives the rotating shaft to move the tool head, enabling operations such as indexing, tool changing, and controlling the high-speed rotation of the tools fixed on the tool head.

[0003] In existing turrets, the motor and bearing inner shaft are typically fixed by creating a step on the rotating shaft and then mounting a fixing plate at the step using screws. This fixing plate secures the bearing inner shaft. However, this method of fixing the bearing with a fixing plate is unsuitable for installation environments with limited space, and subsequent disassembly and maintenance of the turret are inconvenient. Furthermore, the screws are prone to loosening during shaft rotation, resulting in poor reliability of the motor-bearing-shaft fixing structure. This leads to increased rotational error of the shaft and affects the turret's operating accuracy. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art, and proposes a motor-driven turret and machine tool to improve the reliability of the fixed assembly structure between the motor and the rotating shaft in the turret, and ensure that the turret maintains high working accuracy.

[0005] This utility model proposes a direct-drive turret, including a column, a power assembly fixed on the column, and a cutter head driven by the power assembly; the power assembly includes a direct-drive motor and a rotating shaft coaxially connected to the direct-drive motor via a bearing, one end of the rotating shaft being a power output end and the other end being an assembly end, and the inner shaft of the bearing being sleeved on the assembly end of the rotating shaft; the invention is characterized by further including a locking assembly, which is fixedly installed on the assembly end of the rotating shaft to assemble and connect the inner shaft of the bearing with the motor mover of the direct-drive motor, and a radial stop fit connection is formed between the locking assembly and the rotating shaft.

[0006] Preferably, the assembly end is provided with a threaded section; the locking assembly includes a first nut and a second nut screwed onto the threaded section, and a stop washer sandwiched between the first nut and the second nut, wherein the stop washer forms a radial stop fit connection with the rotating shaft, the first nut and the second nut.

[0007] Preferably, the threaded section at the assembly end is provided with a first limiting part, and the inner ring wall of the stop washer is provided with a first stopping part, and a radial stopping fit connection is formed between the first stopping part and the first limiting part.

[0008] Preferably, the first limiting part is a limiting groove, and the first stopping part is a protrusion that can be inserted into the limiting groove.

[0009] Preferably, the limiting groove is configured as an elongated vertical groove extending along the rotation axis.

[0010] Preferably, the outer ring wall of the first nut has at least one first notch, and the outer ring wall of the second nut has at least one first notch; the outer ring wall of the stop washer has a plurality of second stop portions, some of the second stop portions are bent into the first notch to form a radial stop fit connection between the stop washer and the first nut, and some of the second stop portions are bent into the second notch to form a radial stop fit connection between the stop washer and the second nut.

[0011] Preferably, the mounting end of the rotating shaft extends at least partially beyond the lower end face of the direct drive motor.

[0012] Preferably, the power output end of the rotating shaft is provided with a connecting cap, the outer diameter of which is larger than the central shaft hole of the motor mover, and the connecting cap abuts against the upper end face of the direct drive motor.

[0013] Preferably, the power assembly also includes a motor housing that is detachably mounted on the lower end face of the direct drive motor; the mounting end of the rotating shaft extends out of the motor housing, and the mounting end of the rotating shaft is sealed to the motor housing by an oil seal.

[0014] Preferably, a reading sensor is provided in the bottom housing of the motor; after the power assembly is fixed to the column, the reading sensor is located in the wiring cavity inside the column, and a maintenance port communicating with the wiring cavity is provided on the vertical side wall of the column.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This application uses a locking assembly to assemble the rotating shaft. After the inner shaft of the bearing and the motor mover are pressed together, the locking assembly and the rotating shaft form a stop fit connection to prevent loosening. This ensures that the direct drive motor has a reliable fixed assembly structure between the bearing and the rotating shaft during operation. The assembly operation is simple and can also effectively avoid rotational errors caused by unreliable connection structures between the bearing and the rotating shaft of the direct drive motor. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the turret in this application.

[0018] Figure 2 This is a schematic diagram of the exploded structure of the turret in this application.

[0019] Figure 3 This is a three-dimensional structural diagram of the driving component.

[0020] Figure 4 This is a schematic diagram of the assembly structure of the rotating shaft and the assembly components.

[0021] Figure 5 This is a schematic diagram of the three-dimensional structure of the anti-rotation washer ring.

[0022] Figure 6 This is a structural schematic diagram of a partial cross-sectional view of the turret in this application.

[0023] Figure 7 This is a top view of the driving component. Detailed Implementation

[0024] To further illustrate the technical means and effects adopted by this application to achieve its intended purpose, the specific implementation methods, structures, features, and effects according to this application are described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0025] Combination Figure 1 and Figure 2 As shown, the turret includes a column 1, a power assembly 2 fixed on the column 1, and a tool disc 3 fixed on the power output end of the power assembly 2. Multiple mounting planes and mounting slots are arranged on the circumference of the tool disc 3 for fixing turning tool holders or boring tool holders.

[0026] As is well known, a turret is a key functional component used in CNC machine tools, mainly applied in mill-turn machines or machining centers, primarily to enable rapid tool switching and multi-angle machining.

[0027] Further integration Figures 3-7 As shown, the power assembly 2 specifically includes a direct drive motor 21 and a rotating shaft 22 coaxially connected to the direct drive motor 21 via a bearing. The direct drive motor 21 includes a coaxially arranged motor stator and a motor mover 211 driven to rotate by the motor stator; the bearing includes a coaxially arranged bearing outer ring 291 and bearing inner shaft 292; one end of the rotating shaft 22 is the power output end, from which the direct drive motor 21 extends, and the other end of the rotating shaft 22 is the assembly end. The bearing inner shaft 292 is fitted onto the assembly end of the rotating shaft 22, and the rotating shaft 22 presses the bearing inner shaft 292 and the motor mover 211 together through a locking assembly, thereby allowing the motor mover 211 to drive the rotating shaft 22 to rotate through the bearing.

[0028] The mounting end of the rotating shaft 22 is provided with a threaded section 222 and a first limiting portion 223 located on the threaded section 222. The locking assembly includes a first nut 24 and a second nut 26 screwed onto the threaded section 222, and a stop washer 25 sandwiched between the first nut 24 and the second nut 26; the inner ring wall of the stop washer 25 is provided with a first stop portion 251, which is in a stop-fit ​​connection with the first limiting portion 223 of the rotating shaft 22 to prevent the stop washer 25 from rotating relative to the rotating shaft 22; the outer ring wall of the stop washer 25 is provided with a plurality of second stop portions 252, which are in a stop-fit ​​connection with the first nut 24 and the second nut 26 respectively to prevent the first nut 24 and the second nut 26 from rotating relative to the rotating shaft 22.

[0029] Therefore, this application assembles the motor 21 with the mounting end of the rotating shaft 22 by means of a locking assembly. After the inner shaft 292 of the bearing and the moving part 211 of the motor are pressed together, the locking assembly and the rotating shaft 22 form a stop fit connection to prevent loosening. This ensures that the direct drive motor 21 has a reliable fixed assembly structure between the bearing and the rotating shaft 22 during the operation of the power assembly 2, and avoids rotational errors caused by unreliable connection structure between the direct drive motor 21 and the rotating shaft 22.

[0030] The first limiting part 223 of the rotating shaft 22 is a limiting groove, and the first stopping part 251 of the inner ring wall of the stopping washer 25 is a protrusion.

[0031] The limiting groove of the first limiting part 223 is usually set as an elongated vertical groove extending along the axial direction of the rotating shaft 22. When the stop washer 25 is fitted at different axial heights of the rotating shaft 22, the stop washer 25 can form a radial stop fit connection between the first stop part 251 and the first limiting part 223 of the rotating shaft 22.

[0032] The outer ring wall of the first nut 24 has at least one first recess 241, and the outer ring wall of the second nut 26 has at least one first recess 261. The multiple second stop portions 252 on the outer ring wall of the stop washer 25 are also protrusions. Some of the second stop portions 252 are engaged with the first recess 241, while some of the second stop portions 252 are engaged with the second recess 261.

[0033] The stop washer 25 is usually made of metal. During the assembly process, the first stop 251 and the second stop 252 can be bent relative to the body of the stop washer 25, so that the first stop 251 and the rotating shaft 22, and the second stop 252 and the first nut 24 and the second nut 26 respectively form a stop fit connection.

[0034] In addition, the power output end of the rotating shaft 22 is provided with a connecting cap 221, the outer diameter of which is larger than the central shaft hole of the motor mover 211. After the rotating shaft 22 is inserted into the central shaft hole of the motor mover 211, the connecting cap 221 abuts against the upper end face of the direct drive motor 21.

[0035] In addition, the connecting cap 221 is provided with a number of first connecting holes 225, and the cutter head 3 can be fixed to the connecting cap 221 of the rotating shaft 22 by screws engaging with the first connecting holes 225.

[0036] For example, the cutter head 3 is provided with several second connecting holes 31. By passing screws through the second connecting holes 31 and locking them with the corresponding first connecting holes 225, the connecting cap 221 of the cutter head 3 and the rotating shaft 22 are fixedly assembled.

[0037] During assembly, insert the assembly end of the rotating shaft 22 into the central shaft hole of the motor mover 211, so that the connecting cap 221 of the rotating shaft 22 abuts against the upper end face of the direct drive motor 21; then screw the first nut 24 into the assembly end of the rotating shaft 22, and then put the retaining washer 25 into the assembly end of the rotating shaft 22, so that the first retaining part 251 of the retaining washer 25 is inserted into the first limiting part 223 of the rotating shaft 22 to form a radial retaining fit connection; then screw the second nut into the assembly end of the rotating shaft 22; finally, tighten the first nut 24 and the second nut 26 into the threaded section 222 of the rotating shaft 22 respectively, bend and press part of the second retaining part 252 of the retaining washer 25 into the first recess 241 of the first nut 24 to form a radial retaining fit connection, and bend and press part of the second retaining part 252 of the retaining washer 25 into the second recess 261 of the second nut 26 to form a radial retaining fit connection.

[0038] To facilitate the assembly of the locking components onto the mounting end of the rotating shaft 22, the mounting end of the rotating shaft 22 is typically designed to extend at least partially beyond the lower end face of the direct drive motor 21, so that the assembly of the locking components is no longer limited by the size of the central shaft hole of the motor mover 211, making the operation simpler and more convenient.

[0039] As can be seen, the power output end of the rotating shaft 22 is engaged with the upper end face of the direct drive motor 21 through the connecting cap 221, while the assembly end of the rotating shaft 22 is assembled by pressing the inner shaft 292 of the bearing and the motor mover 211 together through the locking assembly, thus realizing the fixed assembly of the rotating shaft 22 with the direct drive motor 21 through the bearing. The assembly operation is simple and the assembly structure is firm and will not loosen.

[0040] Of course, in order to protect the motor mover 211, a limiting plate can also be fixed on the motor mover 211, and the upper end face of the bearing inner shaft 292 abuts against the limiting plate.

[0041] The power assembly 2 also includes a motor housing 23 that is detachably mounted on the lower end face of the direct drive motor 21. After the locking assembly is mounted to the mounting end of the rotating shaft 22 and the bearing inner shaft 292 and the motor mover 211 are pressed together, the motor housing 23 is then fixed to the lower end face of the direct drive motor 21.

[0042] The power assembly 2 is fixedly connected to the column 1 via the motor base housing 23. Specifically, the top of the column 1 is provided with a connecting plate 11, which is fixed to the motor base housing 23 by existing means such as screws, thereby fixing the power assembly 2 to the column 1.

[0043] In addition, the mounting end of the rotating shaft 22 extends out of the motor base 23, and the mounting end of the rotating shaft 22 is sealed to the motor base 23 by an oil seal.

[0044] A reading sensor 4 for detecting the rotation of the rotating shaft 22 is provided on the motor base 23. A wiring hole 231 is also provided on the motor base 23, through which power lines and signal lines extend to the inside of the direct drive motor 211.

[0045] Furthermore, the column 1 has a wiring cavity, and the connecting plate 11 has a clearance hole 12 that communicates with the wiring cavity. When the power assembly 2 is fixedly connected to the connecting plate 11 of the column 1 through the motor base 23, the reading sensor 4 and the part of the mounting end extending out of the motor base 23 both pass through the clearance hole 12 and are located in the wiring cavity.

[0046] To facilitate maintenance and repair of the reading sensor 4, a maintenance port 13 connected to the wiring cavity is provided on the vertical side wall of the column 1. The position of the maintenance port 13 is basically corresponding to the axial height position of the reading sensor 4 in the wiring cavity, so as to facilitate maintenance and repair of the reading sensor 4 through the maintenance port 13 during the use of the turret.

[0047] This application also discloses a machine tool that uses the aforementioned turret.

[0048] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A direct-drive turret, comprising a column, a power assembly fixed on the column, and a cutter head driven by the power assembly; the power assembly includes a direct-drive motor and a rotating shaft coaxially connected to the direct-drive motor via a bearing, one end of the rotating shaft being a power output end and the other end being an assembly end, the inner shaft of the bearing being sleeved on the assembly end of the rotating shaft; characterized in that, It also includes a locking assembly, which is fixedly installed on the assembly end of the rotating shaft to assemble and connect the inner shaft of the bearing with the motor mover of the direct drive motor, and the locking assembly and the rotating shaft form a radial stop fit connection.

2. The turret according to claim 1, characterized in that, The assembly end is provided with a threaded section; the locking assembly includes a first nut and a second nut screwed onto the threaded section, and a stop washer sandwiched between the first nut and the second nut. The stop washer forms a radial stop fit connection with the rotating shaft, the first nut and the second nut.

3. The turret according to claim 2, characterized in that, The threaded section at the assembly end is provided with a first limiting part, and the inner ring wall of the stop washer is provided with a first stopping part. The first stopping part and the first limiting part form a radial stopping fit connection.

4. The turret according to claim 3, characterized in that, The first limiting part is a limiting groove, and the first stopping part is a protrusion that can be inserted into the limiting groove.

5. The turret according to claim 4, characterized in that, The limiting groove is set as an elongated vertical groove extending along the rotation axis.

6. The turret according to claim 2, characterized in that, The outer ring wall of the first nut has at least one first notch, and the outer ring wall of the second nut has at least one first notch; the outer ring wall of the stop washer has multiple second stop portions, some of which are bent into the first notch to form a radial stop fit connection between the stop washer and the first nut, while some of which are bent into the second notch to form a radial stop fit connection between the stop washer and the second nut.

7. The turret according to claim 1, characterized in that, The mounting end of the rotating shaft extends at least partially beyond the lower end face of the direct drive motor.

8. The turret according to claim 1, characterized in that, The power output end of the rotating shaft is equipped with a connecting cap. The outer diameter of the connecting cap is larger than the central shaft hole of the motor mover, and the connecting cap abuts against the upper end face of the direct drive motor.

9. The turret according to any one of claims 1-8, characterized in that, The power assembly also includes a motor housing that can be detachably mounted on the lower end face of the direct drive motor; the mounting end of the rotating shaft extends out of the motor housing, and the mounting end of the rotating shaft is sealed to the motor housing through an oil seal; a reading sensor is provided in the motor housing; after the power assembly is fixed to the column, the reading sensor is located in the wiring cavity provided inside the column, and a maintenance port communicating with the wiring cavity is provided on the vertical side wall of the column.

10. A machine tool, characterized in that, The turret described in any one of claims 1-9 is adopted.

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