Main axle box structure of horizontal lathe

Abstract

A spindle box structure of a horizontal lathe is characterized in that a spindle penetrates through the center of a spindle box, the front end of the spindle extends to the outer side of the spindle box, a spindle box rear end cover is mounted at the rear end of the spindle box, and a rear bearing matched with the rear end of the spindle is mounted on the spindle box rear end cover; a permanent magnet motor is mounted on the spindle, an inner rotor of the permanent magnet motor is fixed on the spindle, and an outer stator of the permanent magnet motor is fixed on the spindle box; a spindle bearing matched with the spindle is installed on the front portion of the spindle box body, and a spindle seal is arranged outside the spindle 5 on the front side of the spindle box body. According to the horizontal lathe main axle box structure, the permanent magnet motor is used for direct drive, a traditional structure is changed, assembly parts are reduced, the assembly difficulty is greatly reduced, a transmission chain is simplified through the direct drive structure, power transmission is more direct, gaps in the transmission chain are eliminated, and the transmission precision is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of machine tools. Background Art

[0002] The horizontal lathe is a machine tool that mainly uses a turning tool to turn the rotating workpiece. Drills, reamer drills, reamers, taps, dies and knurling tools can also be used on the lathe for corresponding processing. The spindle box of the horizontal lathe is used to support the spindle and make it rotate at various speeds. The cone hole at the front end of the spindle can be used to install the top, and the conical surface at the front end of the spindle can also be used to install the chuck and dial to clamp the workpiece. The traditional structure of the 2-meter horizontal lathe spindle box is mainly based on gear speed change, with many assembled parts, complex structure, low transmission accuracy, high cost and high assembly difficulty. Summary of the invention

[0003] In order to solve the above-mentioned problems existing in the gear speed change structure of the traditional horizontal lathe spindle box, the present invention provides a horizontal lathe spindle box structure.

[0004] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: a horizontal car spindle box structure, the spindle 5 is installed through the center of the spindle box body 10 and the front end of the spindle 5 extends to the outside of the spindle box body 10, the rear end cover 12 of the spindle box body is installed at the rear end of the spindle box body 10, and the rear bearing 16 matching with the rear end of the spindle 5 is installed on the rear end cover 12 of the spindle box body; a permanent magnet motor 11 is installed on the spindle 5, the inner rotor 17 of the permanent magnet motor 11 is fixed on the spindle 5, and the outer stator 18 of the permanent magnet motor is fixed on the spindle box body 10; a spindle bearing 4 matching with the spindle 5 is installed on the front part of the spindle box body 10, and a spindle seal 3 is provided on the front side of the spindle box body 10 located outside the spindle 5.

[0005] A plane bearing 7 matching the main shaft 5 is installed in the main shaft housing 10 at the rear side of the main shaft bearing 4 .

[0006] A bearing cover 13 is installed on the rear bearing 16 , and the bearing cover 13 is fixed on the rear end cover 12 of the spindle housing. A bearing seal 14 is installed outside the spindle 5 in the bearing cover 12 , and a bearing inner retaining ring 15 is installed at the rear end of the spindle 5 .

[0007] A sealing ring 9 is installed on the main shaft 5 at the rear side of the plane bearing 7 , and the sealing ring 9 is fixed on the main shaft housing 10 .

[0008] The front side of the spindle housing 10 is located outside the spindle seal 3 and the spindle seal box 2 is fixedly installed.

[0009] The chuck 1 is installed at the front end of the spindle 5.

[0010] The horizontal car spindle box structure of the present invention uses a permanent magnet motor as a direct drive, which changes the traditional structure, reduces the number of assembly parts, and greatly reduces the difficulty of assembly. The direct drive structure simplifies the transmission chain, transmits power more directly, eliminates the gap in the transmission chain, and improves the transmission accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a front cross-sectional structural diagram of the headstock of the horizontal lathe of the present invention.

[0012] In the figure: 1. chuck, 2. spindle sealing box, 3. spindle seal, 4. spindle bearing, 5. spindle, 6. spindle bearing locking nut, 7. plane bearing, 8. plane bearing locking nut, 9. sealing ring, 10. spindle housing, 11. permanent magnet motor, 12. rear end cover of spindle housing, 13. bearing pressure cover, 14. bearing seal, 15. bearing inner retaining ring, 16. rear bearing, 17. motor inner rotor, 18. motor outer stator. DETAILED DESCRIPTION

[0013] The headstock structure of the horizontal lathe of the present invention is as follows Figure 1 As shown, the chuck 1 is fixed to the spindle 5 by screws, the spindle sealing box 2 is fixed to the spindle housing 10 by screws, the spindle seal 3 is installed inside, and the spindle bearing 4 is fixed to the spindle housing 10 by the spindle bearing locking nut 6. The spindle 5 is installed through the center of the spindle housing 10 and the front end of the spindle 5 extends to the outside of the spindle housing 10. The rear end of the spindle housing 10 is installed with the rear end cover 12 of the spindle housing through its own conical surface and screws. The rear bearing 16 that matches the rear end of the spindle 5 is installed on the rear end cover 12 of the spindle housing. The rear bearing 16 is installed with a bearing pressure cover 13, and the bearing pressure cover 13 is fixed to the rear end cover 12 of the spindle housing by screws. A bearing seal 14 is installed inside the bearing pressure cover 12 and is located outside the spindle 5. An inner bearing retaining ring 15 is installed at the rear end of the spindle 5 to prevent the rear bearing 16 from moving laterally. A permanent magnet motor 11 is installed on the spindle 5, and an inner rotor 17 of the permanent magnet motor 11 is fixed to the spindle 5 by a key, and an outer stator 18 of the permanent magnet motor is fixed to the spindle housing 10 by a key and screws. A spindle bearing 4 that matches the spindle 5 is installed at the front of the spindle housing 10, and a spindle seal 3 is provided on the front side of the spindle housing 10 and is located outside the spindle 5. A plane bearing 7 matching the spindle 5 is installed in the spindle housing 10 at the rear side of the spindle bearing 4, and the plane bearing 7 is fixed to the spindle housing 10 through a plane bearing locking nut 8. A sealing ring 9 is installed on the spindle 5 at the rear side of the plane bearing 7, and the sealing ring 9 is fixed to the spindle housing 10.

[0014] Working principle: When the permanent magnet motor 11 is energized, the inner rotor 17 rotates, thereby driving the spindle 5 to rotate. The spindle 5 drives the chuck 1 mounted thereon to rotate, and the workpiece on the chuck 1 is processed, thereby realizing a direct drive structure of the motor and the spindle. The transmission accuracy is greatly improved through the coordinated use of the spindle bearing 4, the plane bearing 7, and the rear bearing 16, i.e., the sealing structure, on the spindle housing 10.

[0015] The present invention is described by way of embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the protection scope of the present invention.

Claims

1. A horizontal lathe spindle box structure, characterized in that: The spindle (5) is installed through the center of the spindle housing (10) and the front end of the spindle (5) extends to the outside of the spindle housing (10); the rear end of the spindle housing (10) is installed with a spindle housing rear end cover (12), and the rear bearing (16) matched with the rear end of the spindle (5) is installed on the rear end cover (12); the spindle (5) is installed with a permanent magnet motor (11), the inner rotor (17) of the permanent magnet motor (11) is fixed on the spindle (5), and the outer stator (18) of the permanent magnet motor is fixed on the spindle housing (10); the front part of the spindle housing (10) is installed with a spindle bearing (4) matched with the spindle (5), and the front side of the spindle housing (10) is provided with a spindle seal (3) outside the spindle (5).

2. The headstock structure of a horizontal lathe according to claim 1, characterized in that: A plane bearing (7) matched with the main shaft (5) is installed in the main shaft housing (10) at the rear side of the main shaft bearing (4).

3. The headstock structure of a horizontal lathe according to claim 1, characterized in that: A bearing cover (13) is installed on the rear bearing (16), and the bearing cover (13) is fixed on the rear end cover (12) of the spindle housing. A bearing seal (14) is installed outside the spindle (5) in the bearing cover (12), and a bearing inner retaining ring (15) is installed at the rear end of the spindle (5).

4. The headstock structure of a horizontal lathe according to claim 1, characterized in that: A sealing ring (9) is installed on the main shaft (5) at the rear side of the plane bearing (7), and the sealing ring (9) is fixed on the main shaft housing (10).

5. The headstock structure of a horizontal lathe according to claim 1, characterized in that: The front side of the spindle housing (10) is located outside the spindle seal (3) and a spindle seal box (2) is fixedly installed.

6. The headstock structure of a horizontal lathe according to claim 1, characterized in that: A chuck (1) is installed at the front end of the main shaft (5).

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