CN219504095U

CN219504095U - Pneumatic cold pressing device for rear bearing of precision spindle

Info

Publication number: CN219504095U
Application number: CN202222332933.3U
Authority: CN
Inventors: 刘秦岭; 蒙万想
Original assignee: Shenzhen Hino Precision Technology Co ltd
Current assignee: Shenzhen Hino Precision Technology Co ltd
Priority date: 2022-09-01
Filing date: 2022-09-01
Publication date: 2023-08-11
Anticipated expiration: 2032-09-01

Abstract

The utility model discloses a pneumatic cold pressing device for a rear bearing of a precision spindle, which comprises a spindle core and a cylinder head, wherein an angular contact ball bearing is sleeved on the outer surface of the spindle core, a bearing seat is arranged on the outer ring of the angular contact ball bearing, a spindle body is arranged at the lower end of the bearing seat, a cylinder piston is connected with the rear end of the spindle core in a threaded manner, a cylinder body is sleeved on the cylinder piston, an O-shaped sealing ring I is arranged at the left end of the cylinder body, and a quick connector I is arranged at the left end of the cylinder piston. The utility model aims to assemble the precise electric spindle under the condition of ensuring that the angular contact ball bearing is not damaged in a dust-free workshop environment, ensure that a bearing lubrication system is not affected, ensure the precision and performance of the precise electric spindle and the stability of product quality, simultaneously reduce the damage of the angular contact ball bearing caused by manual misoperation, ensure convenient and quick assembly of the angular contact ball bearing and reduce unnecessary cost loss.

Description

Pneumatic cold pressing device for rear bearing of precision spindle

Technical Field

The utility model relates to the technical field of precision electric spindle bearing assembly, in particular to a pneumatic cold pressing device for a rear bearing of a precision spindle.

Background

The precision motorized spindle in the prior market has higher requirements on various performances and precision, has high running and machining rotating speed, and often has the tolerance precision grade of P2-P4 for the used bearing. The high-precision bearing has higher assembly requirement, is required to be assembled in a dust-free workshop, has harsh environment and is required to keep the internal environment of the electric spindle clean in the assembly process. The high-precision bearing is in interference fit with the shaft core, is in small clearance fit with the bearing seat, is high in assembly difficulty, needs a certain skill, and cannot be allowed to be knocked violently in the assembly process of the high-precision bearing, otherwise, particle dust can fall into bearing grease to affect a lubrication system of the high-precision bearing. In particular, the angular contact ball bearings are prone to damage to the ball tracks by knocks without pre-tightening the angular contact ball bearings, thereby affecting the useful life of the spindle bearing. Meanwhile, the motor is a high-power density precise electric spindle, a motor stator needs a water cooling system, and therefore, a separate rear bearing seat is needed for the rear bearing of the precise electric spindle, and the assembly of the rear bearing of the precise electric spindle is limited to a certain extent in structure.

Disclosure of Invention

The utility model mainly aims to provide a pneumatic cold pressing device for a rear bearing of a precision main shaft, which can effectively solve the problems in the background technology.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a pneumatic cold pressing device of accurate main shaft rear bearing, includes axle core and cylinder head, there is angular contact ball bearing from the cover on the axle core surface, the bearing frame is installed to angular contact ball bearing outer lane, the main shaft body is installed to the bearing frame lower extreme, axle core rear end threaded connection has the cylinder piston, the cylinder body has been cup jointed on the cylinder piston, O shape sealing washer one is installed to the cylinder body left end, quick-operation joint one is installed to the cylinder piston left end.

Preferably, a threaded connection surface is formed at the position of the rear end thread of the shaft core and the thread of the cylinder piston, and the lower surface of the cylinder body is a cold-pressing bearing surface.

Preferably, the first quick connector, the cylinder body, the first O-shaped sealing ring, the cylinder piston and the second O-shaped sealing ring form a closed pressure cavity, and an external air pressure pipe is connected with the quick connector to form an air pressure pressing-in channel.

Preferably, the cylinder piston is provided with a second O-shaped sealing ring, the cylinder body is provided with a second quick connector and a second cylinder head respectively, the cylinder head is provided with a third O-shaped sealing ring and a fourth O-shaped sealing ring, the second quick connector, the cylinder body, the second O-shaped sealing ring, the cylinder piston, the cylinder head, the fourth O-shaped sealing ring and the third O-shaped sealing ring form a closed reset cavity, and the second quick connector is connected with an external air pressure pipe to form an air pressure reset channel.

Preferably, the cylinder cover, the O-shaped sealing ring IV, the O-shaped sealing ring III, the cylinder body, the quick connector II, the quick connector I, the O-shaped sealing ring I, the cylinder piston and the O-shaped sealing ring II form a pneumatic cold pressing device at the relative axial position, the sliding stroke of the cylinder of the pneumatic cold pressing device is 1.2-1.5 times of the thickness of the bearing, the cylinder cover, the O-shaped sealing ring IV, the O-shaped sealing ring III, the cylinder body, the quick connector II, the quick connector I and the O-shaped sealing ring I form a pneumatic sliding part at the relative axial position, and the cylinder piston, the O-shaped sealing ring I and the shaft core form a pneumatic fixing part at the relative axial position.

Preferably, the first quick connector and the second quick connector are externally connected with a pneumatic tube.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model aims to assemble a precise electric spindle under the condition of ensuring that an angular contact ball bearing is not damaged in a dust-free workshop environment, ensure that a bearing lubrication system is not affected, ensure the precision and performance of the precise electric spindle and ensure the stability of product quality.

2. The utility model can reduce the damage of the angular contact ball bearing caused by manual misoperation, and the angular contact ball bearing is convenient and quick to assemble, thereby reducing unnecessary cost loss.

3. The labor intensity of staff is reduced, the enthusiasm of staff work is increased, and meanwhile, the production efficiency is improved.

Drawings

FIG. 1 is a schematic diagram of the whole structure of a pneumatic cold pressing device for a rear bearing of a precision spindle;

FIG. 2 is a schematic diagram of the overall structure of a pneumatic cold pressing device for a rear bearing of a precision spindle;

fig. 3 is a schematic diagram of the overall structure of the position a of the pneumatic cold pressing device of the rear bearing of the precision spindle.

In the figure: 1. a shaft core; 2. angular contact ball bearings; 3. a rear bearing seat; 4. a cylinder block; 5. o-shaped sealing ring I; 51. o-shaped sealing rings II; 52. an O-shaped sealing ring III; 53. an O-shaped sealing ring IV; 6. a first quick connector; 61. the air pressure is pressed into the channel; 62. a pressure cavity; 7. a cylinder piston; 8. a second quick connector; 81. an air pressure reset channel; 82. resetting the cavity; 9. a cylinder head; 10. a main shaft body; 11. a threaded connection surface; 12. cold pressing the bearing surface.

Detailed Description

The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1-3, a pneumatic cold pressing device for a rear bearing of a precision spindle comprises a spindle core 1 and a cylinder cover 9, wherein an angular contact ball bearing 2 is sleeved on the outer surface of the spindle core 1, a bearing seat 3 is installed on the outer ring of the angular contact ball bearing 2, a spindle body 10 is installed at the lower end of the bearing seat 3, a cylinder piston 7 is connected with the rear end of the spindle core 1 in a threaded manner, a cylinder body 4 is sleeved on the cylinder piston 7, an O-shaped sealing ring I5 is installed at the left end of the cylinder body 4, and a quick connector I6 is installed at the left end of the cylinder piston 7.

The screw thread at the rear end of the shaft core 1 and the screw thread of the cylinder piston 7 form a screw thread connection surface 11, and the lower surface of the cylinder body 4 is a cold-pressing bearing surface 12.

The first quick connector 6, the cylinder body 4, the first O-shaped sealing ring 5, the cylinder piston 7 and the second O-shaped sealing ring 51 form a closed pressure cavity 62, and the first quick connector 6 is connected with an external air pressure pipe to form an air pressure pressing-in channel 61.

The cylinder piston 7 is provided with an O-shaped sealing ring II 51, the cylinder body 4 is provided with a quick connector II 8 and a cylinder cover 9 respectively, the cylinder cover 9 is provided with an O-shaped sealing ring III 52 and an O-shaped sealing ring IV 53, the quick connector II 8, the cylinder body 4, the O-shaped sealing ring II 51, the cylinder piston 7, the cylinder cover 9, the O-shaped sealing ring IV 53 and the O-shaped sealing ring III 52 form a closed reset cavity 82, and the quick connector II 8 is connected with an external air pressure pipe to form an air pressure reset channel 81.

The cylinder cover 9, the O-shaped sealing ring IV 53, the O-shaped sealing ring III 52, the cylinder body 4, the quick connector II 8, the quick connector I6, the O-shaped sealing ring I5, the cylinder piston 7 and the O-shaped sealing ring II 51 form a pneumatic cold pressing device at the relative axial position, the sliding stroke of the cylinder of the pneumatic cold pressing device is 1.2-1.5 times of the thickness of the bearing, the cylinder cover 9, the O-shaped sealing ring IV 53, the O-shaped sealing ring III 52, the cylinder body 4, the quick connector II 8, the quick connector I6 and the O-shaped sealing ring I5 form a pneumatic sliding part at the relative axial position, and the cylinder piston 7, the O-shaped sealing ring I5 and the shaft core 1 form a pneumatic fixing part at the relative axial position.

The first quick connector 6 and the second quick connector 8 are connected with an air pressure pipe.

The utility model relates to a pneumatic cold pressing device for a rear bearing of a precision spindle, which comprises the steps of firstly, fixing a shaft core 1 on a workbench when an angular contact ball bearing 2 behind the precision spindle is assembled, reversely placing the precision spindle, cleaning the surface of the angular contact ball bearing 2, and placing the angular contact ball bearing 2 to a guiding position of the shaft core 1 according to the angle orientation of a bearing pairing mode, wherein the outer diameter of the shaft core at the guiding position of the shaft core 1 is 5-10 mu m smaller than the inner diameter of the bearing. The small part of the outer ring of the shaft core 1 is sleeved in the bearing chamber of the rear bearing seat 3 to form a guiding function, the pneumatic cold pressing device 102 is cleaned, and the cylinder piston 7 is kept clean. Opening an air pressure pipe air valve at the air pressure reset channel 81 so as to enable air pressure to be filled in the reset cavity 82, resetting the air pressure cylinder body 4, removing the air pressure pipe after reset, screwing the air pressure pipe into the screw thread at the rear end of the shaft core 1 by the air pressure pipe piston 7 on the air pressure cold pressing device, fixing the air pressure pipe on the shaft core, enabling the air pressure fixing parts such as the air pressure piston 7 to be static relative to the mandrel, enabling the cold pressing bearing surface on the air pressure cylinder body 4 to cling to the inner and outer surfaces of the air pressure ball bearing 2, effectively preventing the particle bearing balls, then slowly adjusting the pressure of air pressure through the air pressure press channel 61 in the quick connector I6, enabling the air pressure sliding part to be slowly pressed along the axial position until the air pressure sliding stroke of the air pressure sliding part of the air pressure cold pressing device is ended, removing the air pressure pipe air valve at the air pressure reset channel 81, enabling the air pressure cylinder body 4 to be reset after reset, screwing the air pressure pipe after reset, fixing the air pressure pipe after reset, enabling the air pressure pipe piston 7 on the air pressure cold pressing device to be in the second particle bearing 2 to be placed to the guide position of the shaft core 1 according to the angle orientation of the bearing pairing mode, fixing the air pressure pipe piston 7 on the air pressure core 1 into the rear end of the shaft core 1, finally, enabling the air pressure sliding part to be slowly pressed into the air pressure pipe through the quick connector I6, and slowly adjusting the air pressure ball bearing to be pressed along the air pressure ball bearing 2 until the air pressure is slowly pressed along the air pressure contact through the air pressure channel through the quick connector I.

The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a pneumatic cold pressing device of accurate main shaft rear bearing, includes axle core (1) and cylinder head (9), its characterized in that: the novel self-locking type hydraulic cylinder is characterized in that an angular contact ball bearing (2) is sleeved on the outer surface of the shaft core (1), a bearing seat (3) is arranged on the outer ring of the angular contact ball bearing (2), a main shaft body (10) is arranged at the lower end of the bearing seat (3), a cylinder piston (7) is connected with the rear end of the shaft core (1) in a threaded mode, a cylinder body (4) is sleeved on the cylinder piston (7), an O-shaped sealing ring I (5) is arranged at the left end of the cylinder body (4), and a quick connector I (6) is arranged at the left end of the cylinder piston (7).

2. The pneumatic cold pressing device for the rear bearing of the precision spindle according to claim 1, wherein: a thread connection surface (11) is formed at the thread position of the rear end of the shaft core (1) and the thread position of the cylinder piston (7), and the lower surface of the cylinder body (4) is a cold-pressing bearing surface (12).

3. The pneumatic cold pressing device for the rear bearing of the precision spindle according to claim 1, wherein: the quick connector I (6), the cylinder body (4), the O-shaped sealing ring I (5), the cylinder piston (7) and the O-shaped sealing ring II (51) form a closed pressure cavity (62), and the quick connector I (6) is connected with an external air pressure pipe to form an air pressure pressing-in channel (61).

4. The pneumatic cold pressing device for the rear bearing of the precision spindle according to claim 1, wherein: the cylinder piston (7) is provided with an O-shaped sealing ring II (51), the cylinder body (4) is provided with a quick connector II (8) and a cylinder head (9) respectively, the cylinder head (9) is provided with an O-shaped sealing ring III (52) and an O-shaped sealing ring IV (53), the quick connector II (8), the cylinder body (4), the O-shaped sealing ring II (51), the cylinder piston (7), the cylinder head (9), the O-shaped sealing ring IV (53) and the O-shaped sealing ring III (52) form a closed reset cavity (82), and the quick connector II (8) is connected with an external air pressure pipe to form an air pressure reset channel (81).

5. The pneumatic cold pressing device for the rear bearing of the precision spindle according to claim 1, wherein: the pneumatic cold pressing device is characterized in that the cylinder cover (9), the O-shaped sealing ring IV (53) and the O-shaped sealing ring III (52), the cylinder body (4), the quick connector II (8), the quick connector I (6), the O-shaped sealing ring I (5), the cylinder piston (7) and the O-shaped sealing ring II (51) form a pneumatic cold pressing device at the relative axial position, the sliding stroke of the cylinder of the pneumatic cold pressing device is 1.2-1.5 times of the thickness of the bearing, the cylinder cover (9), the O-shaped sealing ring IV (53), the O-shaped sealing ring III (52), the cylinder body (4), the quick connector II (8), the quick connector I (6) and the O-shaped sealing ring I (5) form a pneumatic sliding part at the relative axial position, and the cylinder piston (7), the O-shaped sealing ring I (5) and the shaft core (1) form a pneumatic fixing part at the relative axial position.

6. A precision spindle rear bearing pneumatic cold pressing apparatus as defined in claim 3, wherein: the first quick connector (6) and the second quick connector (8) are connected with an air pressure pipe.