High-speed stable main shaft of torque motor

Abstract

The utility model discloses a high-speed stable main shaft of a torque motor, which comprises a shaft body, an axial through cavity is arranged in the shaft body, a core shaft is arranged in the cavity, an axial through cavity is arranged in the core shaft, a lifting shaft is arranged in the cavity, the bottom of the lifting shaft is connected with an elastic component, and the elastic component is connected with the core shaft. The tool bit is tightened through the tightening assembly, and a torque motor is arranged between the mandrel and the shaft body. Compared with a traditional mechanical spindle, the electric spindle is simpler in internal structure, more accurate and rapid in control mode and wider in application range; the high-speed motorized spindle can achieve the rotating speed of tens of thousands of revolutions per minute, compared with a traditional hydraulic spindle and a mechanical spindle, the rotating speed is higher, the machining efficiency and precision can be greatly improved, electric energy can be converted into mechanical energy, and therefore energy loss is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of main shafts, in particular to a high-speed stable main shaft of a torque motor. Background Art

[0002] The spindle is the axis on a machine tool that rotates the workpiece or tool. It typically consists of a spindle, bearings, and transmission components (gears or pulleys). In machines, it primarily supports transmission components such as gears and pulleys, transmitting motion and torque, as in the case of machine tool spindles. Some, like spindles, are used to clamp workpieces. With the exception of planers and broaching machines, where the primary motion is linear, most machine tools have spindles. The spindle's motion accuracy and structural rigidity are crucial factors in determining machining quality and cutting efficiency.

[0003] The mechanical spindle uses transmission gears or belts to transmit power, which has low working efficiency. The speed cannot be adjusted during use and the gears or belts need to be replaced to adjust the speed. The manufacturing process of the mechanical spindle is relatively simple, but the manufacturing precision requirements are extremely high and the manufacturing cost is relatively high. Utility Model Content

[0004] In order to solve the above technical problems, a high-speed stable main shaft of a torque motor is provided.

[0005] To achieve the above-mentioned purpose, the present invention is configured in a preferred embodiment as including a shaft body, an axially penetrating cavity is provided inside the shaft body, a core shaft is provided in the cavity, an axially penetrating cavity is provided inside the core shaft, a lifting shaft is provided in the cavity, a tensioning assembly is connected to the bottom of the lifting shaft, the cutter head is tightened or loosened by the tensioning assembly, and a torque motor is provided between the core shaft and the shaft body.

[0006] In a preferred embodiment, the present invention can be further configured as a high-speed stable main shaft of a torque motor, including a shaft body, an axially penetrating cavity is provided inside the shaft body, a core shaft is provided in the cavity, an axially penetrating cavity is provided inside the core shaft, a lifting shaft is provided in the cavity, the bottom of the lifting shaft is connected with a tensioning component, and the tool head is tightened or loosened by the tensioning component, a torque motor is provided between the core shaft and the shaft body, the tensioning component includes a pulling head, one end of the pulling head is connected to the lifting shaft, and the other end is inserted into the top of the pulling claw, and the pulling claw limits the pulling head, and the bottom of the pulling claw cooperates with the limiting cavity corresponding to the core shaft.

[0007] In a preferred embodiment, the present invention can be further configured as a high-speed stable main shaft of a torque motor, including a shaft body, an axially penetrating cavity is provided inside the shaft body, a core shaft is provided in the cavity, an axially penetrating cavity is provided inside the core shaft, a lifting shaft is provided in the cavity, the bottom of the lifting shaft is connected with a tensioning component, and the tool head is tightened or loosened by the tensioning component, a torque motor is provided between the core shaft and the shaft body, the tensioning component includes a pulling head, one end of the pulling head is connected to the lifting shaft, and the other end is inserted into the top of the pulling claw, and the pulling claw limits the pulling head, the bottom of the pulling claw cooperates with the limiting cavity corresponding to the core shaft, and the connection between the pulling head and the lifting shaft is a threaded connection.

[0008] In a preferred embodiment, the present invention can be further configured as a high-speed stable main shaft of a torque motor, including a shaft body, an axially penetrating cavity is provided inside the shaft body, a core shaft is provided in the cavity, an axially penetrating cavity is provided inside the core shaft, a lifting shaft is provided in the cavity, the bottom of the lifting shaft is connected with a tensioning component, and the cutter head is tightened or loosened by the tensioning component, a torque motor is provided between the core shaft and the shaft body, the tensioning component includes a pulling head, one end of the pulling head is connected to the lifting shaft, and the other end is inserted into the top of the pulling claw, and the pulling claw limits the pulling head, the bottom of the pulling claw cooperates with the limiting cavity corresponding to the core shaft, the connection between the pulling head and the lifting shaft is a threaded connection, and a disc spring is provided in the gap between the lifting shaft and the core shaft.

[0009] In a preferred embodiment, the present invention can be further configured as a high-speed stable main shaft of a torque motor, including a shaft body, an axially penetrating cavity is provided inside the shaft body, a core shaft is provided in the cavity, an axially penetrating cavity is provided inside the core shaft, a lifting shaft is provided in the cavity, the bottom of the lifting shaft is connected with a tensioning component, and the cutter head is tightened or loosened by the tensioning component, a torque motor is provided between the core shaft and the shaft body, the tensioning component includes a pulling head, one end of the pulling head is connected to the lifting shaft, and the other end is inserted into the top of the pulling claw, and the pulling claw restricts the pulling head, the bottom of the pulling claw cooperates with the limiting cavity corresponding to the core shaft, the connection between the pulling head and the lifting shaft is a threaded connection, a disc spring is provided in the gap between the lifting shaft and the core shaft, and a thrust ball bearing is provided between the top of the disc spring and the cover plate.

[0010] In a preferred embodiment, the utility model can be further configured as a high-speed stable main shaft of a torque motor, including a shaft body, an axially penetrating cavity is provided inside the shaft body, a core shaft is provided in the cavity, an axially penetrating cavity is provided inside the core shaft, a lifting shaft is provided in the cavity, the bottom of the lifting shaft is connected with a tensioning component, and the cutter head is tightened or loosened by the tensioning component, and a torque motor is provided between the core shaft and the shaft body, and the tensioning component includes a pulling head, one end of the pulling head is connected to the lifting shaft, and the other end is inserted into the top of the pulling claw, and the pulling claw restricts the pulling head, and the bottom of the pulling claw cooperates with the limiting cavity corresponding to the core shaft, and the connection between the pulling head and the lifting shaft is a threaded connection, and a disc spring is provided in the gap between the lifting shaft and the core shaft, a thrust ball bearing is provided between the top of the disc spring and the cover plate, and two groups of needle bearings stacked up and down are provided between the outer wall of the bottom of the core shaft and the inner wall corresponding to the shaft body.

[0011] In a preferred embodiment, the utility model can be further configured as a high-speed stable main shaft of a torque motor, including a shaft body, an axially penetrating cavity is provided inside the shaft body, a core shaft is provided in the cavity, a lifting shaft is provided inside the core shaft, and a loosening component is connected to the bottom of the lifting shaft, and the cutter head is loosened and tightened by the loosening component, and a torque motor is provided between the core shaft and the shaft body, and the loosening component includes a pulling head, one end of the pulling head is connected to the lifting shaft, and the other end is inserted into the top of the pulling claw, and the pulling claw restricts the pulling head, the bottom of the pulling claw cooperates with the limiting cavity corresponding to the core shaft, the connection between the pulling head and the lifting shaft is a threaded connection, a disc spring is provided in the gap between the lifting shaft and the core shaft, a thrust ball bearing is provided between the top of the disc spring and the cover plate, two groups of needle bearings stacked up and down are provided between the outer wall of the bottom of the core shaft and the inner wall corresponding to the shaft body, and a cooling channel is provided inside the shaft body, and the cooling channel is spirally arranged from top to bottom.

[0012] Beneficial effect: The high-speed stable spindle of a torque motor of the utility model has a simpler internal structure than the traditional mechanical spindle, and the control method is more precise and faster, and the scope of application is wider; the high-speed electric spindle can achieve a speed of up to tens of thousands of rpm, which is higher than the traditional hydraulic spindle and mechanical spindle. It can greatly improve the processing efficiency and accuracy, and can convert electrical energy into mechanical energy, thereby reducing energy loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0014] Figure 1 This is a cross-sectional view of the utility model.

[0015] In the figure, 1 is the shaft; 2 is the torque motor; 3 is the core shaft; 4 is the lifting shaft; 5 is the disc spring; 6 is the pulling head; and 7 is the pulling claw. DETAILED DESCRIPTION

[0016] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] like Figure 1 As shown, a torque motor high-speed stable spindle includes a shaft body 1, an axially penetrating cavity is provided inside the shaft body 1, a core shaft 3 is provided in the cavity, an axially penetrating cavity is provided inside the core shaft 3, a lifting shaft 4 is provided in the cavity, and a tensioning component is connected to the bottom of the lifting shaft 4, and the tool head is tightened or loosened by the tensioning component. A torque motor 2 is provided between the core shaft 3 and the shaft body 1, and the built-in torque motor 2 is used directly to drive the core shaft 3 to rotate, without the need for an external pulley group, thereby reducing the conversion and consumption of kinetic energy and achieving higher precision.

[0018] The tensioning assembly includes a pull head 6, one end of the pull head 6 is connected to the lifting shaft 4, and the other end is inserted into the top of the pull claw 7, and the pull claw 7 limits the pull head 6, and the bottom of the pull claw 7 cooperates with the limiting cavity corresponding to the core shaft 3. By pulling the lifting shaft 4, the pull head 6 will rise accordingly, and the pulling claw 7 will be driven to rise during the rising process. When the pulling claw 7 rises, it will cooperate with the limiting cavity of the core shaft 3 to tighten the bottom of the pulling claw 7, thereby clamping the tool head.

[0019] The connection between the pulling head 6 and the pulling shaft 4 is a threaded connection, which is more secure.

[0020] A disc spring is provided in the gap between the lifting shaft 4 and the core shaft 3, and a thrust ball bearing is provided between the top of the disc spring 5 and the cover plate, so that the lifting shaft 4 can be quickly returned to its original position when released after being pulled up.

[0021] Two sets of needle bearings stacked up and down are provided between the outer wall of the bottom of the core shaft 3 and the inner wall corresponding to the shaft body 1 to reduce the friction between the core shaft 3 and the shaft body 1.

[0022] A cooling channel is provided inside the shaft body 1 , and the cooling channel is spirally arranged from top to bottom, and the core shaft 3 is cooled through the cooling channel.

[0023] It should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity from another entity, but do not necessarily require or imply any actual relationship or order between these entities.

[0024] The above examples are merely illustrative of the present invention and do not limit the scope of protection of the present invention. Any design that is identical or similar to the present invention falls within the scope of protection of the present invention.

Claims

1. A torque motor high-speed stable spindle, characterized in that: The invention comprises a shaft body (1), wherein an axially penetrating cavity is arranged inside the shaft body (1), a core shaft (3) is arranged in the cavity, an axially penetrating cavity is arranged inside the core shaft (3), a lifting shaft (4) is arranged in the cavity, a tensioning assembly is connected to the bottom of the lifting shaft (4), and a cutter head is tightened or loosened by the tensioning assembly, and a torque motor (2) is arranged between the core shaft (3) and the shaft body (1).

2. A torque motor high-speed stable spindle according to claim 1, characterized in that: The tensioning assembly comprises a pull head (6), one end of which is connected to the lifting shaft (4), and the other end is inserted into the top of a pull claw (7), and the pull claw (7) limits the pull head (6), and the bottom of the pull claw (7) cooperates with the limiting cavity at the corresponding position of the core shaft (3).

3. A torque motor high-speed stable spindle according to claim 2, characterized in that: The connection between the pull head (6) and the lifting shaft (4) is a threaded connection.

4. A torque motor high-speed stable spindle according to claim 3, characterized in that: A disc spring (5) is provided in the gap between the lifting shaft (4) and the core shaft (3).

5. A torque motor high-speed stable spindle according to claim 4, characterized in that: A thrust ball bearing is arranged between the top of the disc spring (5) and the cover plate.

6. A torque motor high-speed stable spindle according to claim 5, characterized in that: Two sets of needle bearings stacked up and down are arranged between the outer wall at the bottom of the core shaft (3) and the inner wall at a position corresponding to the shaft body (1).

7. A torque motor high-speed stable spindle according to claim 6, characterized in that: A cooling channel is arranged inside the shaft body (1), and the cooling channel is arranged in a spiral shape from top to bottom.

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