High-precision small vertical lathe spindle structure

Abstract

The utility model discloses a high-precision small vertical lathe spindle structure which comprises two double-row short cylindrical roller bearings, a high-precision angular contact thrust ball bearing, a magnetic grid encoder, a spindle core, a spindle and a cable, the number of the double-row short cylindrical roller bearings is two, and the number of the high-precision angular contact thrust ball bearing is one. The main shaft is arranged outside the shaft core, a double-row short cylindrical roller bearing and a high-precision angular contact thrust ball bearing are installed between the shaft core and the front end of the main shaft, and the double-row short cylindrical roller bearing and the high-precision angular contact thrust ball bearing are arranged in a front-back adjacent mode; a double-row short cylindrical roller bearing is arranged between the shaft core and the rear end of the main shaft; the double-row short cylindrical roller bearing and the high-precision angular contact thrust ball bearing are arranged at an interval; an end cover is installed on the tail portion of the rear end of the main shaft, a magnetic grid encoder is installed between the end cover and the shaft core, and the magnetic grid encoder is connected with a control system through a cable. According to the utility model, the high-precision and high-stability operation of the main shaft is effectively realized.

Description

Technical Field

[0001] This utility model relates to a high-precision small vertical lathe spindle structure, belonging to the field of mechanical technology. Background Technology

[0002] With the increasing demands for machining precision and efficiency in the manufacturing industry, traditional vertical lathe spindle structures suffer from problems such as high vibration, high temperature, and insufficient rigidity in high-speed, high-precision machining, making it difficult to meet the needs of modern precision machining. Therefore, there is an urgent need for a new type of high-precision, compact vertical lathe spindle structure to improve machining accuracy and stability. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, this utility model provides a high-precision small vertical lathe spindle structure. This structure effectively achieves high-precision and high-stability operation of the spindle and extends its lifespan by optimizing the bearing arrangement, lubrication method and detection device.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: a high-precision small vertical lathe spindle structure, including a double-row short cylindrical roller bearing, a high-precision angular contact thrust ball bearing, a magnetic encoder, a shaft core, a main spindle, and a cable. The number of double-row short cylindrical roller bearings is two, and the number of high-precision angular contact thrust ball bearings is one. The main spindle is located outside the shaft core. A double-row short cylindrical roller bearing and a high-precision angular contact thrust ball bearing are installed between the shaft core and the front end of the main spindle. The double-row short cylindrical roller bearing and the high-precision angular contact thrust ball bearing are arranged adjacent to each other, forming a front-end bearing group. A double-row short cylindrical roller bearing is installed between the shaft core and the rear end of the main spindle, forming a rear-end bearing group. The double-row short cylindrical roller bearing and the high-precision angular contact thrust ball bearing are arranged alternately, with a bearing clearance reserved. An end cap is installed at the rear end of the main spindle. A magnetic encoder is installed between the end cap and the shaft core. The magnetic encoder is connected to the cable, and the cable is connected to the control system.

[0005] Furthermore, the main spindle structure of this high-precision small vertical lathe is lubricated with imported grease, and the spindle bearing cavity is filled with imported grease.

[0006] The beneficial effects of this utility model are as follows: Through high-precision bearings and preload design, this utility model significantly improves the rotational accuracy and rigidity of the spindle; the optimized bearing arrangement and lubrication method effectively reduce vibration and temperature rise, ensuring the stability of the spindle during high-speed operation; the use of barium selenide composite grease extends the bearing life and reduces maintenance costs; the configuration of the magnetic encoder enables real-time monitoring of spindle speed and position, improving machining accuracy and reliability. Attached Figure Description

[0007] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0008] Figure 1 This is a schematic diagram of the structure of this utility model.

[0009] Numbering on the map:

[0010] 1. Double row short cylindrical roller bearing, 2. High-precision angular contact thrust ball bearing, 3. Magnetic encoder, 4. Shaft core, 5. Spindle, 6. Cable. Detailed Implementation

[0011] like Figure 1 As shown, a high-precision miniature vertical lathe spindle structure includes a double-row short cylindrical roller bearing 1, a high-precision angular contact thrust ball bearing 2, a magnetic encoder 3, a shaft core 4, a main spindle 5, and a cable 6. The number of double-row short cylindrical roller bearings 1 is two, and the number of high-precision angular contact thrust ball bearings 2 is one. The main spindle 5 is disposed outside the shaft core 4. A double-row short cylindrical roller bearing 1 and a high-precision angular contact thrust ball bearing 2 are installed between the shaft core 4 and the front end of the main spindle 5. The double-row short cylindrical roller bearing 1 and the high-precision angular contact thrust ball bearing 2 are arranged adjacent to each other. Two bearings constitute the front bearing assembly; a double-row short cylindrical roller bearing 1 is installed between the shaft core 4 and the rear end of the main shaft 5, which constitutes the rear bearing assembly. The double-row short cylindrical roller bearing 1 and the high-precision angular contact thrust ball bearing 2 are arranged alternately with a bearing clearance reserved; an end cover is installed at the rear end of the main shaft 5, and a magnetic encoder 3 is installed between the end cover and the shaft core 4. The magnetic encoder 3 is connected to the cable 6, which is connected to the control system; the main shaft structure of this high-precision small vertical lathe is lubricated with imported grease, and the bearing cavity of the main shaft is filled with imported grease.

[0012] During bearing installation, the high-precision double-row short cylindrical roller bearing 1 and the high-precision angular contact thrust ball bearing 2 of the front bearing assembly are precisely assembled and installed between the front end of the main shaft 5 and the shaft core 4. The high-precision double-row short cylindrical roller bearing 1 of the rear bearing assembly is precisely assembled and installed between the rear end of the main shaft 5 and the shaft core 4. The use of high-precision double-row short cylindrical roller bearing 1 enables radial support, ensuring high rigidity and high precision of the main shaft 5 in the radial direction. The high-precision angular contact thrust ball bearing 2 is used as a rolling guide in the axial direction to provide axial support and bear axial loads. Axial preload is applied to eliminate bearing clearance and improve the rigidity and rotational accuracy of the main shaft 5. The high-precision double-row short cylindrical roller bearing 1 at the rear end provides radial support, which, together with the front bearing assembly, ensures high stability of the main shaft 5 in both the radial and axial directions.

[0013] The spindle bearing cavity is filled with imported grease. Imported grease is used to ensure that the bearing is fully lubricated when rotating at high speed. Imported grease has good anti-wear properties and high temperature stability, which can effectively reduce friction and temperature rise and extend bearing life.

[0014] The detection device installation involves mounting the magnetic encoder 3 on the non-drive end of the spindle 5 and connecting it to the control system via cable 6. The magnetic encoder 3 is used to monitor the speed and position of the spindle 5 in real time to ensure machining accuracy. The configured cable 6 is used to transmit encoder signals, facilitating integration with the control system. Preload adjustment ensures high rigidity and high precision of the spindle 5 in both the axial and radial directions by adjusting the preload of the front bearing assembly.

Claims

1. A high-precision miniature vertical lathe spindle structure, characterized in that: The system includes a double-row short cylindrical roller bearing (1), a high-precision angular contact thrust ball bearing (2), a magnetic encoder (3), a shaft core (4), a main shaft (5), and a cable (6). There are two double-row short cylindrical roller bearings (1) and one high-precision angular contact thrust ball bearing (2). The main shaft (5) is located outside the shaft core (4). A double-row short cylindrical roller bearing (1) and a high-precision angular contact thrust ball bearing (2) are installed between the shaft core (4) and the front end of the main shaft (5). Ball bearings (2) are arranged adjacent to each other, forming the front bearing group; a double-row short cylindrical roller bearing (1) is installed between the shaft core (4) and the rear end of the main shaft (5), forming the rear bearing group. The double-row short cylindrical roller bearing (1) and the high-precision angular contact thrust ball bearing (2) are arranged at intervals, with a bearing clearance reserved; an end cover is installed at the tail of the rear end of the main shaft (5), and a magnetic encoder (3) is installed between the end cover and the shaft core (4). The magnetic encoder (3) is connected to the cable (6), and the cable (6) is connected to the control system.

2. The high-precision miniature vertical lathe spindle structure according to claim 1, characterized in that: This structure uses imported grease lubrication, and the spindle bearing cavity is filled with imported grease.

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