Spindle supporting structure of numerically controlled lathe

Abstract

The utility model relates to the technical field of numerically controlled lathes, and discloses a numerically controlled lathe spindle supporting structure which comprises a box body, a first end cover and a second end cover are installed at the two ends of the box body respectively, a spindle is movably connected between the first end cover and the second end cover in a sleeved mode, and limiting sleeves are installed at the two ends of the spindle. And a supporting mounting sleeve is movably sleeved in the box body. According to the spindle supporting structure of the numerically controlled lathe, the auxiliary plate installed on the side face of the first bearing is arranged at one end of the limiting sleeve, meanwhile, the auxiliary plate installed on the inner side of the auxiliary plate drives the second ball to be attached to the outer portion of the limiting sleeve, and the second ball reduces friction resistance when the limiting sleeve rotates; and through mutual oblique movement between the auxiliary plates, pressure generated when the main shaft moves towards the rear end can be applied, and the problem that after the first bearing is subjected to transverse pressure, the bearing is damaged is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of numerically controlled lathes, in particular to a main shaft supporting structure of a numerically controlled lathe. Background Art

[0002] The spindle components of CNC machine tools include the spindle, the spindle's supporting bearings and the transmission parts installed on the spindle, etc. The spindle components are important components of machine tools, and the advancement of their structure has become one of the symbols to measure the level of machine tools. Due to the high speed and high power of CNC, and no manual adjustment is required during the processing, the spindle components are required to have good rotation accuracy, structural rigidity, vibration resistance, thermal stability, wear resistance and maintenance of processing accuracy.

[0003] At present, during the installation and use of the lathe spindle support structure, the support bearing contains a bearing inside, and the bearing is sleeved on the outside of the spindle during operation. Since one side of the bearing will fit against one end of the spindle, the bearing can reduce the friction when the spindle rotates, thereby ensuring that the spindle rotates more smoothly. However, when the spindle of the machine tool is in use, when the spindle is subjected to pressure at one lateral end, the spindle will exert lateral pressure on the bearing, and the pressure will cause the bearing to shift to the outside of the spindle, thereby causing the spindle rotation trajectory to shift, thereby affecting the rotation efficiency of the spindle on the machine tool. For this reason, we propose a spindle support structure for CNC lathes. Utility Model Content

[0004] In view of the shortcomings of the existing CNC lathe spindle support structure, the utility model provides a CNC lathe spindle support structure, which has an auxiliary plate installed on one side of the first bearing, the auxiliary plate drives the auxiliary plate installed on the outside of the limit sleeve, and the second ball reduces the friction resistance between the main shaft and the limit sleeve. When the main shaft moves laterally, the auxiliary plate moves inside the auxiliary plate to release pressure, thereby avoiding extrusion and displacement of the position of the first bearing, thereby solving the problems raised in the above-mentioned background technology.

[0005] The utility model provides the following technical scheme: a spindle supporting structure of a CNC lathe comprises a box body, two ends of the box body are respectively installed with a first end cover and a second end cover, a spindle is movably sleeved between the first end cover and the second end cover, two ends of the spindle are installed with limiting sleeves, the inner movably sleeved with a support mounting sleeve of the box body, the outer side of the support mounting sleeve is installed with a positioning cross bar, the inner side of the positioning cross bar is fixedly connected with a positioning pin, one end of the support mounting sleeve is fixedly connected with a first baffle plate, the side of the first baffle plate is fixedly connected with a positioning column, the outer side of the positioning column is sleeved with a spring, the outer side of one end of the positioning column is movably sleeved with a second baffle plate, the outer side of the spindle is sleeved with a first bearing, a second bearing and a third bearing are sleeved in sequence, the lower end of the second bearing is installed with a bearing inner ring, a first ball is installed between the second bearing and the bearing inner ring, one side of the bearing inner ring is fixedly connected with an auxiliary plate, the inner side of the auxiliary plate is movably sleeved with the auxiliary plate, and a second ball is installed at one end of the auxiliary plate.

[0006] Preferably, the first end cover and the second end cover are mounted on the outside of the box body by fastening bolts, and the first end cover and the second end cover are arranged on the outside of the limiting sleeve.

[0007] Preferably, a slide groove is provided on the outside of the support installation sleeve, the positioning pin is movably sleeved inside the slide groove, and the positioning cross bar is arranged inside the guide groove provided inside the box body.

[0008] Preferably, the first bearing and the third bearing are mounted on the ends of the main shaft, and the first baffle is arranged on one side of the first bearing and the third bearing.

[0009] Preferably, an oblique groove is formed at one end of the auxiliary plate, the auxiliary plate is attached to the inner side of the auxiliary plate, and the second ball mounted on the side of the auxiliary plate is mounted on the side of the limiting sleeve.

[0010] Preferably, the second bearing is installed in the middle of the outer part of the main shaft, and the lower ends of the first bearing, the second bearing and the third bearing are all installed with first balls and bearing inner rings.

[0011] Preferably, the second baffle is installed outside the second bearing, and the spring is arranged between the first baffle and the second baffle.

[0012] Compared with the existing CNC lathe spindle support structure, the utility model has the following beneficial effects:

[0013] 1. The spindle supporting structure of the CNC lathe is arranged at one end of the limit sleeve through an auxiliary plate installed on the side of the first bearing, and the auxiliary plate installed on the inner side of the auxiliary plate makes the second ball fit the outside of the limit sleeve, and the second ball reduces the friction resistance when the limit sleeve rotates, and when the spindle is in use and pressure is applied to the rear end, the auxiliary plate and the auxiliary plate move obliquely with each other, and then the pressure generated by the movement of the spindle to the rear end can be processed, thereby avoiding the problem of bearing damage caused by lateral pressure on the first bearing.

[0014] 2. The spindle support structure of the CNC lathe is installed at both ends of the spindle through the support installation sleeve. According to the different lengths of the spindle, positioning cross bars of different lengths are installed on the outside of the support installation sleeve. After the positioning cross bar drives the positioning pin to be clamped in the inside of the support installation sleeve, the position between the positioning cross bar and the support installation sleeve is limited, and the positioning cross bar is clamped in the inside of the box. The positioning cross bar limits the position of the support installation sleeve to improve the stability of the equipment during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the main body of the utility model;

[0017] Figure 3 It is a partial enlarged structural schematic diagram of the support structure of the utility model;

[0018] Figure 4 It is a partial enlarged structural schematic diagram of the utility model;

[0019] Figure 5 This is an enlarged structural diagram of the utility model at A;

[0020] Figure 6 It is a schematic diagram of the enlarged structure of point B of the utility model.

[0021] In the figure: 1. box body; 2. first end cover; 3. second end cover; 4. support mounting sleeve; 5. positioning cross bar; 6. positioning pin; 7. first baffle plate; 8. positioning column; 9. spring; 10. second baffle plate; 11. first bearing; 12. second bearing; 13. third bearing; 14. first ball; 15. bearing inner ring; 16. auxiliary plate; 17. auxiliary inclined plate; 18. second ball; 19. main shaft; 20. limit sleeve. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 A spindle support structure for a numerically controlled lathe comprises a box body 1, a first end cover 2 and a second end cover 3 are respectively installed at both ends of the box body 1, the first end cover 2 and the second end cover 3 limit the position of the equipment, a spindle 19 is movably sleeved between the first end cover 2 and the second end cover 3, and a limiting sleeve 20 is installed at both ends of the spindle 19, a support installation sleeve 4 is movably sleeved inside the box body 1, a positioning cross bar 5 is installed outside the support installation sleeve 4, the positioning cross bar 5 is limited to the outside of the support installation sleeve 4, and the positioning cross bar 5 can limit the position between the two groups of support installation sleeves 4, a positioning pin 6 is fixedly connected to the inner side of the positioning cross bar 5, and a first baffle 7 is fixedly connected to one end of the support installation sleeve 4, and the first baffle 7 limits the positions of the first bearing 11 and the third bearing 13, and the side of the first baffle 7 is fixed A positioning column 8 is connected, and a spring 9 is sleeved on the outside of the positioning column 8. A second baffle 10 is movably sleeved on the outside of one end of the positioning column 8. The spring 9 pushes the second baffle 10 to move inward. At the same time, the second baffle 10 limits the position of the second bearing 12. The outside of the main shaft 19 is sleeved with the first bearing 11, the second bearing 12 and the third bearing 13 in sequence. A bearing inner ring 15 is installed at the lower end of the second bearing 12. A first ball 14 is installed between the second bearing 12 and the bearing inner ring 15. An auxiliary plate 16 is fixedly connected to one side of the bearing inner ring 15. An auxiliary plate 17 is movably sleeved on the inner side of the auxiliary plate 16. A second ball 18 is installed at one end of the auxiliary plate 17. The second ball 18 is installed on the side of the limiting sleeve 20 to reduce the friction resistance between the limiting sleeve 20 and the auxiliary plate 16.

[0024] See also Figure 2 The first end cover 2 and the second end cover 3 are installed on the outside of the box body 1 by fastening bolts, and the first end cover 2 and the second end cover 3 are arranged on the outside of the limiting sleeve 20. After the main shaft 19 is installed inside the box body 1, the first end cover 2 and the second end cover 3 are installed at both ends of the box body 1 at the same time, and the first end cover 2 and the second end cover 3 limit the position of the main shaft 19 inside the box body 1.

[0025] See also Figure 3 and Figure 5A slide groove is provided on the outside of the supporting and mounting sleeve 4, and the positioning pin 6 is movably sleeved inside the slide groove. The positioning cross bar 5 is arranged inside the guide groove provided inside the box body 1. A groove is provided on the outside of the supporting and mounting sleeve 4, and the supporting and mounting sleeve 4 drives the positioning cross bar 5 to be arranged inside the groove. The positioning cross bar 5 drives the position of the supporting and mounting sleeve 4 to be limited. At the same time, after the supporting and mounting sleeve 4 drives the positioning cross bar 5 to be movably sleeved inside the box body 1, the positioning cross bar 5 is clamped inside the guide groove provided inside the box body 1, that is, the stability of the supporting and mounting sleeve 4 is improved when the position inside the box body 1 is limited.

[0026] See also Figure 4 The first bearing 11 and the third bearing 13 are installed at the end of the main shaft 19, and the first baffle 7 is arranged on one side of the first bearing 11 and the third bearing 13. The first bearing 11 and the third bearing 13 are installed at the end of the main shaft 19. At the same time, the first baffle 7 limits the position of the first bearing 11 and the third bearing 13, thereby avoiding the problem of position deviation of the equipment.

[0027] See also Figure 5 An oblique groove is provided at one end of the auxiliary plate 17, and the auxiliary plate 17 is fitted on the inner side of the auxiliary plate 16. The second ball 18 installed on the side of the auxiliary plate 17 is installed on the side of the limiting sleeve 20. The second ball 18 is fitted on the outside of the limiting sleeve 20. When the limiting sleeve 20 applies pressure toward the rear end, the auxiliary plate 17 slides obliquely inside the auxiliary plate 16. The movement of the auxiliary plate 17 improves the buffering capacity of the equipment, and the second ball 18 is fitted on the outside of the limiting sleeve 20 to reduce the friction of the equipment.

[0028] See also Figure 5 The second bearing 12 is installed in the middle of the outside of the main shaft 19, and the lower ends of the first bearing 11, the second bearing 12 and the third bearing 13 are all installed with the first ball 14 and the bearing inner ring 15. The second bearing 12 is installed in the middle of the outside of the main shaft 19. The first bearing 11, the second bearing 12 and the third bearing 13 can reduce the friction force of the main shaft 19 when it rotates, thereby improving the rotation efficiency of the main shaft 19.

[0029] See also Figure 6 The second baffle plate 10 is installed on the outside of the second bearing 12, and the spring 9 is arranged between the first baffle plate 7 and the second baffle plate 10. The spring 9 is arranged between the first baffle plate 7 and the second baffle plate 10, and the second baffle plate 10 is pushed to move inward under the elastic action of the spring 9, thereby driving the second bearing 12 to be arranged in the middle part outside the main shaft 19, thereby improving the stability of the second bearing 12 when it is positioned outside the main shaft 19.

[0030] Working principle: When in use, the first bearing 11, the second bearing 12 and the third bearing 13 are sleeved on the outside of the main shaft 19 in sequence, and the limiting sleeves 20 are installed at both ends of the main shaft 19 for fixing. At the same time, the support installation sleeve 4 is sleeved on the outside of the first bearing 11 and the third bearing 13. According to the different lengths of the main shaft 19, the positioning cross bar 5 is controlled to be sleeved on the position of the support installation sleeve 4, and then the length between the two groups of support installation sleeves 4 is limited, and the second baffle 10 is pushed to move inward under the elastic action of the spring 9, and the second baffle 10 is sleeved on the second bearing 12. On the outside, the second bearing 12 is driven to move to the outside of the main shaft 19 to be centered. After the support mounting sleeve 4 is installed inside the box body 1, the support mounting sleeve 4 drives the positioning cross bar 5 to be clamped inside the box body 1, thereby improving the convenience and stability of the equipment during installation. A first end cover 2 and a second end cover 3 are installed at both ends of the box body 1. The first end cover 2 and the second end cover 3 can limit the position of the support mounting sleeve 4. At the same time, when the main shaft 19 rotates, the first bearing 11, the second bearing 12 and the third bearing 13 reduce the friction resistance of the first ball 14 during rotation, thereby improving the rotation effect of the equipment.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spindle support structure for a CNC lathe, comprising a box body (1), a first end cover (2) and a second end cover (3) being respectively installed at both ends of the box body (1), a spindle (19) being movably sleeved between the first end cover (2) and the second end cover (3), and limit sleeves (20) being installed at both ends of the spindle (19), characterized in that: The box body (1) is internally movably sleeved with a support mounting sleeve (4), the support mounting sleeve (4) is externally mounted with a positioning cross bar (5), the inner side of the positioning cross bar (5) is fixedly connected with a positioning pin (6), one end of the support mounting sleeve (4) is fixedly connected with a first baffle (7), the side of the first baffle (7) is fixedly connected with a positioning column (8), the outer side of the positioning column (8) is sleeved with a spring (9), the outer side of one end of the positioning column (8) is movably sleeved with a second baffle (10), the main shaft The outer part of the bearing (19) is sleeved with a first bearing (11), a second bearing (12) and a third bearing (13) in sequence; a bearing inner ring (15) is installed at the lower end of the second bearing (12); a first ball (14) is installed between the second bearing (12) and the bearing inner ring (15); an auxiliary plate (16) is fixedly connected to one side of the bearing inner ring (15); an auxiliary inclined plate (17) is movably sleeved on the inner side of the auxiliary plate (16); a second ball (18) is installed at one end of the auxiliary inclined plate (17).

2. The spindle support structure of a CNC lathe according to claim 1, characterized in that: The first end cover (2) and the second end cover (3) are mounted on the outside of the box body (1) by means of fastening bolts, and the first end cover (2) and the second end cover (3) are arranged on the outside of the limiting sleeve (20).

3. The spindle support structure of a CNC lathe according to claim 1, characterized in that: The support installation sleeve (4) is provided with a slide groove on the outside, the positioning pin (6) is movably sleeved inside the slide groove, and the positioning cross bar (5) is arranged inside a guide groove provided inside the box body (1).

4. The spindle support structure of a CNC lathe according to claim 1, characterized in that: The first bearing (11) and the third bearing (13) are installed at the ends of the main shaft (19), and the first baffle (7) is arranged on one side of the first bearing (11) and the third bearing (13).

5. The spindle support structure of a CNC lathe according to claim 1, characterized in that: An oblique groove is formed at one end of the auxiliary inclined plate (17), the auxiliary inclined plate (17) is fitted on the inner side of the auxiliary plate (16), and a second ball (18) mounted on the side of the auxiliary inclined plate (17) is mounted on the side of the limiting sleeve (20).

6. The spindle support structure of a CNC lathe according to claim 1, characterized in that: The second bearing (12) is installed in the middle of the outside of the main shaft (19), and the lower ends of the first bearing (11), the second bearing (12) and the third bearing (13) are all installed with a first ball (14) and a bearing inner ring (15).

7. The spindle support structure of a CNC lathe according to claim 1, characterized in that: The second baffle plate (10) is installed outside the second bearing (12), and the spring (9) is arranged between the first baffle plate (7) and the second baffle plate (10).

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