Machine tool spindle head

Abstract

The utility model provides a machine tool spindle head which comprises a speed reduction assembly and a first motor and is characterized in that the speed reduction assembly comprises a first gear, a duplicate gear and a second gear, the duplicate gear comprises a first gear part and a second gear part, the first gear is provided with a first taper in the axis direction, and the second gear is provided with a second taper in the axis direction; the first gear part is provided with a third taper in the axis direction, the second gear part is provided with a fourth taper in the axis direction, the first gear is meshed with the first gear part, the second gear is meshed with the second gear part, the first gear is connected with the output end of the first motor, and a gasket is arranged between the first gear and the first motor. The gear transmission gap in the speed reduction assembly can be eliminated, and the machining precision and the working stability of a machine tool are improved.

Description

Technical Field

[0001] This utility model relates to the field of mechanical equipment technology, and in particular to a machine tool spindle head. Background Technology

[0002] CNC machine tools convert machining programs into machine tool control signals through a computer control system, enabling automatic machining of workpieces. They are characterized by high precision, high efficiency, and high degree of automation.

[0003] In CNC machine tool spindle heads, the gear transmission of the reduction assembly achieves power transmission and conversion of speed and torque through the meshing of gears. Excessive backlash in the gear transmission of the reduction assembly leads to decreased transmission accuracy, thus affecting the machining accuracy of the machine tool. During transmission, the gears are subjected to additional vibration and torque, further reducing machining accuracy and even introducing errors. Due to excessive gear backlash, the gears cannot mesh properly, easily causing phenomena such as gear jumping, wobbling, or booming, resulting in a lack of stability in machine tool operation and consequently affecting workpiece machining accuracy and work efficiency. Utility Model Content

[0004] Therefore, one objective of this utility model is to provide a machine tool spindle head to solve the problems mentioned in the background art and overcome the shortcomings of the existing technology.

[0005] To achieve the above objectives, this utility model provides a machine tool spindle head, including a reduction assembly and a first motor. The reduction assembly includes a first gear, a double gear, and a second gear. The double gear includes a first gear section and a second gear section. The first gear has a first taper along the axial direction, and the second gear has a second taper along the axial direction. The first gear section has a third taper along the axial direction, and the second gear section has a fourth taper along the axial direction. The first gear meshes with the first gear section, and the second gear meshes with the second gear section. The first gear is connected to the output end of the first motor, and a shim is provided between the first gear and the first motor.

[0006] Furthermore, the first taper direction gradually decreases from the tooth tip to the tooth root of the first gear, and the angle range of the first taper is 0.5 degrees to 10 degrees; the second taper direction gradually decreases from the tooth tip to the tooth root of the second gear, and the angle range of the second taper is 0.5 degrees to 10 degrees; the third taper direction gradually decreases from the tooth tip to the tooth root of the first gear, and the angle range of the third taper is 0.5 degrees to 10 degrees; the fourth taper direction gradually decreases from the tooth tip to the tooth root of the second gear, and the angle range of the fourth taper is 0.5 degrees to 10 degrees.

[0007] Furthermore, it also includes a housing and a shaft head body, with the shaft head body located inside the housing. The housing contains a roller cam assembly, which is connected to the shaft head body via a rotating shaft.

[0008] Furthermore, the roller cam assembly includes a roller and a cam, the roller meshes with the cam, the roller is connected to a second gear, and the cam is connected to the shaft head body via a rotating shaft that passes through the shaft head body, with the axis of the rotating shaft perpendicular to the axis of the shaft head body.

[0009] Furthermore, the output end of the first motor is connected to the roller via a reduction gear assembly, and the first motor is used to drive the roller.

[0010] Furthermore, a second motor is provided inside the shaft head body, and a connecting end is provided on the shaft head body. The second motor extends out from the connecting end, and a flange is provided at the connecting end. The flange is connected to the motor shaft of the second motor.

[0011] Furthermore, the housing includes a support portion and a connecting portion. The support portion is U-shaped and includes two support arms. The shaft head body is located between the two support arms, and the two ends of the rotating shaft are rotatably connected to the two support arms respectively.

[0012] Furthermore, the roller cam assembly is located within the connecting part.

[0013] Furthermore, the shaft is connected to the two support arms via bearings.

[0014] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0015] This invention achieves a tight engagement of the three gears by setting the first gear, the second gear, the first gear section, and the second gear section to taper, adjusting the axial position of the first gear by adjusting the thickness of the shims, and adjusting the axial position of the second gear section by adjusting the fixed shaft. This eliminates the backlash in the gear transmission and improves the machining accuracy and working stability of the machine tool.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of a machine tool spindle head according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of removing the outer shell from a machine tool spindle head according to an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of a speed reduction assembly and a roller cam assembly in a machine tool spindle head according to an embodiment of the present invention.

[0021] Wherein: 1-First gear; 2-Second gear; 3-First gear section; 4-Second gear section; 5-First motor; 6-Shim; 7-Housing; 8-Shaft; 9-Roller; 10-Cam; 11-Flange; 12-Support section; 13-Connecting section; 14-Groove; 15-Shaft head body; 16-Connecting end; 17-Fixed shaft. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] like Figures 1 to 3 As shown in the figure, a machine tool spindle head according to an embodiment of the present invention includes a reduction gear assembly and a first motor 5. The reduction gear assembly includes a first gear 1, a double gear, and a second gear 2. The double gear includes a first gear section 3 and a second gear section 4. The first gear 1 has a first taper along the axial direction, the second gear 2 has a second taper along the axial direction, the first gear section 3 has a third taper along the axial direction, and the second gear section 4 has a fourth taper along the axial direction. The first gear 1 meshes with the first gear section 3, and the second gear 2 meshes with the second gear section 4. The first gear 1 is connected to the output end of the first motor 5, and a shim 6 is provided between the first gear 1 and the first motor 5. A fixed shaft 17 is provided in the middle of the second gear section 4.

[0025] This invention provides tapered features to the first gear 1, the second gear 2, the first gear section 3, and the second gear section 4, and uses the thickness of the adjusting shim 6 to finely control the axial positioning of the first gear, and uses the fixed shaft 17 to precisely control the axial positioning of the second gear section 4, ensuring tight meshing between the gears, thereby effectively eliminating the backlash problem in gear transmission, and ultimately improving the machining accuracy and operational stability of the machine tool.

[0026] Specifically, the first taper direction gradually decreases from the tooth tip to the tooth root of the first gear 1, and the angle range of the first taper is 0.5 degrees to 10 degrees; the second taper direction gradually decreases from the tooth tip to the tooth root of the second gear 2, and the angle range of the second taper is 0.5 degrees to 10 degrees; the third taper direction gradually decreases from the tooth tip to the tooth root of the first gear 3, and the angle range of the third taper is 0.5 degrees to 10 degrees; the fourth taper direction gradually decreases from the tooth tip to the tooth root of the second gear 4, and the angle range of the fourth taper is 0.5 degrees to 10 degrees.

[0027] Furthermore, it also includes a housing 7 and a shaft head body 15. The shaft head body 15 is disposed inside the housing 7, and a roller 9 cam 10 assembly is provided inside the housing 7. The roller 9 cam 10 assembly is connected to the shaft head body 15 through a rotating shaft 8. The rotating shaft 8 is fixedly connected to the shaft head body 15.

[0028] Furthermore, the roller 9 and cam 10 assembly includes a roller 9 and a cam 10. The roller 9 meshes with the cam 10 and is connected to the second gear 2. The cam 10 is connected to the shaft head body 15 via a rotating shaft 8. The rotating shaft 8 passes through the shaft head body 15, and the axis of the rotating shaft 8 is perpendicular to the axis of the shaft head body 15.

[0029] In one embodiment, the cam 10 is coaxially connected to the rotating shaft 8, and one end of the roller 9 is rotatably connected to the support portion 12 of the housing 7.

[0030] Furthermore, the output end of the first motor 5 is connected to the roller 9 via a reduction gear assembly, and the first motor 5 is used to drive the roller 9. The roller 9 cam 10 assembly drives the rotating shaft 8 to rotate, thereby causing the shaft head body 15 to swing.

[0031] The centers of the first motor 5, roller 9, and cam 10 are located on the same horizontal plane, that is, the first motor 5, roller 9, and cam 10 are arranged side by side, and the axis of the output shaft of the first motor 5 is parallel to the axis of the roller 9.

[0032] Specifically, a second motor is installed inside the shaft head body 15. The shaft head body 15 has a connecting end 16, from which the second motor extends. A flange 11 is provided at the connecting end 16, and the flange 11 is connected to the motor shaft of the second motor. The flange 11 serves as a connecting structure for connecting and mounting the cutting tool. The motor shaft of the second motor drives the flange 11 to rotate, thereby causing the cutting tool to rotate and process the workpiece.

[0033] Furthermore, the housing 7 includes a support portion 12 and a connecting portion 13. The support portion 12 is U-shaped and includes two support arms. The shaft head body 15 is located between the two support arms, and both ends of the rotating shaft 8 are rotatably connected to the two support arms respectively. The upper surface of the housing 7 is provided with a groove 14 for accommodating the gear of the reduction assembly.

[0034] Furthermore, the roller 9 cam 10 assembly is located within the connecting part 13.

[0035] Furthermore, the rotating shaft 8 is connected to the two support arms via bearings.

[0036] The working principle of this utility model of a machine tool shaft head is as follows: by giving the first gear 1, the second gear 2, the first gear section 3 and the second gear section 4 a tapered feature, and by using the thickness of the adjusting shim 6 to finely control the axial positioning of the first gear 1, and by using the fixed shaft 17 to precisely control the axial positioning of the second gear section 4, the purpose of eliminating the backlash in the gear transmission is achieved.

[0037] Compared with the prior art, the present invention has the following advantages: by setting the first gear 1, the second gear 2, the first gear part 3 and the second gear part 4 with tapers, the present invention eliminates the backlash in gear transmission, thereby improving the machining accuracy and working stability of the machine tool.

[0038] It will be readily understood by those skilled in the art that this utility model includes any combination of the utility model content and specific embodiments described in the foregoing specification, as well as the various parts shown in the accompanying drawings. Due to space limitations and for the sake of brevity, not all of these combinations have been described in detail. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0039] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and alterations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A machine tool spindle head, comprising a reduction gear assembly and a first motor, characterized in that, The reduction assembly includes a first gear, a double gear, and a second gear. The double gear includes a first gear section and a second gear section. The first gear has a first taper along the axial direction, and the second gear has a second taper along the axial direction. The first gear section has a third taper along the axial direction, and the second gear section has a fourth taper along the axial direction. The first gear meshes with the first gear section, and the second gear meshes with the second gear section. The first gear is connected to the output end of the first motor, and a shim is provided between the first gear and the first motor.

2. A machine tool spindle head according to claim 1, characterized in that, The first taper direction gradually decreases from the tip of the first gear to the root of the first gear, and the angle range of the first taper is 0.5 degrees to 10 degrees; the second taper direction gradually decreases from the tip of the second gear to the root of the second gear, and the angle range of the second taper is 0.5 degrees to 10 degrees; the third taper direction gradually decreases from the tip of the first gear to the root of the first gear, and the angle range of the third taper is 0.5 degrees to 10 degrees; the fourth taper direction gradually decreases from the tip of the second gear to the root of the second gear, and the angle range of the fourth taper is 0.5 degrees to 10 degrees.

3. The machine tool spindle head according to claim 1, further comprising a housing and a spindle head body, characterized in that, The shaft head body is disposed inside the housing, and a roller cam assembly is provided inside the housing. The roller cam assembly is connected to the shaft head body through a rotating shaft.

4. A machine tool spindle head according to claim 3, characterized in that, The roller cam assembly includes a roller and a cam, the roller meshes with the cam, the roller is connected to the second gear, and the cam is connected to the shaft head body via a rotating shaft that passes through the shaft head body, with the axis of the rotating shaft perpendicular to the axis of the shaft head body.

5. A machine tool spindle head according to claim 4, characterized in that, The output end of the first motor is connected to the roller through the reduction gear assembly, and the first motor is used to drive the roller.

6. A machine tool spindle head according to claim 3, characterized in that, The shaft head body is equipped with a second motor inside. The shaft head body is provided with a connecting end. The second motor extends from the connecting end. The connecting end is provided with a flange, which is connected to the motor shaft of the second motor.

7. A machine tool spindle head according to claim 3, characterized in that, The housing includes a support portion and a connecting portion. The support portion is U-shaped and includes two support arms. The shaft head body is located between the two support arms, and the two ends of the rotating shaft are rotatably connected to the two support arms respectively.

8. A machine tool spindle head according to claim 6, characterized in that, The roller cam assembly is located within the connecting part.

9. A machine tool spindle head according to claim 7, characterized in that, The rotating shaft is connected to the two support arms via bearings.

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