Upper drive main shaft of high-precision grinding machine

Abstract

The utility model discloses a high-precision grinding machine upper drive main shaft which comprises a piston sleeve of a cylindrical structure, an upper end cover is fixed to the left end of the piston sleeve through a screw, a lower end cover is fixed to the right end of the piston sleeve through a screw, and a main shaft is arranged in the middle of the interior of the piston sleeve. The center of the upper end cover and the center of the lower end cover are each provided with a through hole allowing the two ends of the spindle to pass through, a first angular contact ball bearing is arranged between the right end of the interior of the piston sleeve and the spindle, a bearing seat is fixedly installed on the right side of the lower end cover, a second angular contact ball bearing is arranged between the bearing seat and the spindle, and a stator is arranged on the inner side of the piston sleeve. The upper driving main shaft of the high-precision grinding machine is simple in structure, the motor and the main shaft are fused together, a high-power grinding shaft can be driven by using a low-power motor structure, the driving main shaft is connected by adopting two groups of bearings, and the two groups of bearings are mounted in a sealing manner, so that the friction force generated when the driving main shaft rotates is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of high-precision grinding machines, in particular to an upper drive spindle of a high-precision grinding machine. Background Art

[0002] A grinder refers to a grinder that uses a grinding tool coated with or embedded with abrasives to grind the surface of a workpiece. It is mainly used to grind high-precision planes, internal and external cylindrical surfaces, conical surfaces, spherical surfaces, threaded surfaces and other surfaces in the workpiece. Grinding is an important processing method in ultra-precision machining. Its advantages are high machining accuracy and a wide range of processing materials. In order to reduce the space occupied by the device, many top-driven spindles have appeared on the market, combining the spindle with the motor. For example, in the patent application publication number CN112658294A, although the motor and the spindle are integrated together, the spindle and the housing are still rigidly connected, which generates large friction and poor sealing effect. It cannot be cooled during operation, and the use effect is poor. Utility Model Content

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a high-precision grinding machine drive spindle with a simple structure. The motor and the spindle are integrated together. A low-power motor structure can drive a high-power grinding shaft. The drive spindles are connected by two sets of bearings, and the two sets of bearings are sealed and installed, which greatly reduces the friction generated when the drive spindle rotates, and can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-precision grinding machine has an upper drive spindle, comprising a piston sleeve of a cylindrical structure, the left end of the piston sleeve is fixed with an upper end cover by screws, and the right end of the piston sleeve is fixed with a lower end cover by screws, a spindle is provided in the middle of the interior of the piston sleeve, and the centers of the upper end cover and the lower end cover are provided with through holes for the two ends of the spindle to pass through, a group of angular contact ball bearings 1 is provided between the inner right end of the piston sleeve and the spindle, a bearing seat is fixedly installed on the right side of the lower end cover, and a group of angular contact ball bearings 2 is provided between the bearing seat and the spindle, a stator is provided on the inner side of the piston sleeve, a water-cooling structure is provided between the stator and the piston sleeve, the outer side of the spindle is connected to the rotor by a fastening plate, the rotor corresponds to the stator, and a cable connector is provided on the upper end cover.

[0005] Furthermore, two locking nuts are provided on the main shaft, and the two locking nuts lock angular contact ball bearing 1 and angular contact ball bearing 2 respectively. A TC skeleton rubber oil seal is provided between the locking nut on the left and the upper end cover, and a sealing boss is provided at the edge of the locking nut on the right, and an annular groove with the sealing boss is provided on one side of the lower end cover.

[0006] Furthermore, the water cooling structure includes a spiral water cooling channel arranged on the outside of the stator, and the piston sleeve is provided with two pipe joints identical to the two ends of the spiral water cooling channel. The two ends of the stator and the inner side of the spiral water cooling channel are sealed. When the main shaft of the device is working, external cooling water enters from one end of the spiral water cooling channel, then flows through the spiral water cooling channel and finally flows out from the other end, thereby cooling the device.

[0007] Furthermore, O-rings are respectively provided between the upper end cover, the lower end cover and the piston sleeve, and annular grooves corresponding to the O-rings are respectively provided on the upper end cover and the lower end cover. The O-rings make the connection and sealing effect between the upper end cover, the lower end cover and the piston sleeve better.

[0008] Compared with the existing technology, the beneficial effects of the utility model are: the high-precision grinding machine has a drive spindle with a simple structure, and the motor and the spindle are integrated together. A low-power motor structure can drive a high-power grinding shaft. The drive spindles are connected by two sets of bearings, and the two sets of bearings are sealed and installed, which greatly reduces the friction generated when the drive spindle rotates. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the structure of the utility model.

[0010] In the figure: 1 piston sleeve, 2 upper end cover, 3 lower end cover, 4 main shaft, 5 angular contact ball bearing 1, 6 bearing seat, 7 angular contact ball bearing 2, 8 stator, 9 water cooling structure, 91 spiral water cooling channel, 92 pipe joint, 10 fastening plate, 11 rotor, 12 locking nut, 13 TC skeleton rubber oil seal, 14 O-ring. DETAILED DESCRIPTION

[0011] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0012] See also Figure 1The utility model provides a technical solution: a high-precision grinding machine drives a main shaft, including a piston sleeve 1 of a cylindrical structure, the left end of the piston sleeve 1 is fixed with an upper end cover 2 by screws, and the right end of the piston sleeve 1 is fixed with a lower end cover 3 by screws, a main shaft 4 is provided in the middle of the piston sleeve 1, and the centers of the upper end cover 2 and the lower end cover 3 are provided with through holes for the two ends of the main shaft 4 to pass through, a group of angular contact ball bearings 5 ​​is provided between the right end of the piston sleeve 1 and the main shaft 4, a bearing seat 6 is fixedly installed on the right side of the lower end cover 3, and a group of Angular contact ball bearing 2 7, a stator 8 is provided on the inner side of the piston sleeve 1, a water cooling structure 9 is provided between the stator 8 and the piston sleeve 1, the outer side of the main shaft 4 is connected to the rotor 11 through a fastening plate 10, the rotor 11 corresponds to the stator 8, and a cable connector is provided on the upper end cover 2, two locking nuts 12 are provided on the main shaft 4, the two locking nuts 12 are respectively locked to the angular contact ball bearing 1 5 and the angular contact ball bearing 2 7, a TC skeleton rubber oil seal 13 is provided between the locking nut 12 on the left and the upper end cover 2, and a sealing boss is provided on the edge of the locking nut 12 on the right. One side of the lower end cover 3 is provided with an annular groove with a sealing boss. The water cooling structure 9 includes a spiral water cooling channel 91 arranged on the outside of the stator 8. The piston sleeve 1 is provided with two pipe joints 92 identical to the two ends of the spiral water cooling channel 91. The two ends of the stator 8 are sealed with the inner side of the spiral water cooling channel 91. When the main shaft 4 of the device is working, the external cooling water enters from one end of the spiral water cooling channel 91, then flows through the spiral water cooling channel 91 and finally flows out from the other end. In this way, the device is cooled. The upper end cover 2 and the lower end cover 3 are connected to the piston sleeve 1. O-rings 14 are respectively provided between the upper end cover 2 and the lower end cover 3, and annular grooves corresponding to the O-rings 14 are respectively provided on the upper end cover 2 and the lower end cover 3. The O-rings 14 make the connection and sealing effect between the upper end cover 2 and the lower end cover 3 and the piston sleeve 1 better. The high-precision grinding machine has an upper drive spindle with a simple structure. The motor and the spindle are integrated together. A low-power motor structure can drive a high-power grinding shaft. The drive spindles are connected by two sets of bearings, and the two sets of bearings are sealed. This greatly reduces the friction generated when the drive spindle rotates, and can be cooled during operation.

[0013] During use: the O-ring 14 is used to make the connection and sealing effect between the upper end cover 2 and the lower end cover 3 and the piston sleeve 1 better, and the rotor 11 and the stator 8 are energized to realize the function of the motor, thereby driving the main shaft 4 to rotate. The main shaft 4 is only connected through the angular contact ball bearing 1 5 and the angular contact ball bearing 2 7, which greatly reduces the friction generated by the main shaft 4 with other shells when rotating, or the ordinary exposed bearings enter with dust and generate greater friction. Therefore, a low-power motor structure can be used to drive a high-power grinding shaft, and the motor and the drive shaft are integrated together to reduce the space occupied by the device. When the main shaft 4 of the device is working, external cooling water enters from one end of the spiral water cooling channel 91, then flows through the spiral water cooling channel 91 and finally flows out from the other end, thereby cooling the device.

[0014] Although the 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 these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A high-precision grinding machine upper drive spindle, comprising a piston sleeve (1) of a cylindrical structure, characterized in that: The left end of the piston sleeve (1) is fixed with an upper end cover (2) by screws, and the right end of the piston sleeve (1) is fixed with a lower end cover (3) by screws. A main shaft (4) is provided in the middle of the interior of the piston sleeve (1). The centers of the upper end cover (2) and the lower end cover (3) are both provided with through holes for the two ends of the main shaft (4) to pass through. A group of angular contact ball bearings (1) is provided between the right end of the interior of the piston sleeve (1) and the main shaft (4). A bearing seat (6) is fixedly installed on the right side of the lower end cover (3). A group of angular contact ball bearings (2) (7) is provided between the bearing seat (6) and the main shaft (4). A stator (8) is provided on the inner side of the piston sleeve (1). A water cooling structure (9) is provided between the stator (8) and the piston sleeve (1). The outer side of the main shaft (4) is connected to a rotor (11) through a fixing plate (10). The rotor (11) corresponds to the stator (8), and a cable connector is provided on the upper end cover (2).

2. The high-precision grinding machine upper drive spindle according to claim 1, characterized in that: Two locking nuts (12) are provided on the main shaft (4), and the two locking nuts (12) are respectively used to lock the angular contact ball bearing 1 (5) and the angular contact ball bearing 2 (7). A TC skeleton rubber oil seal (13) is provided between the left locking nut (12) and the upper end cover (2). A sealing boss is provided at the edge of the right locking nut (12), and an annular groove is provided on one side of the lower end cover (3) to connect with the sealing boss.

3. The high-precision grinding machine upper drive spindle according to claim 1, characterized in that: The water cooling structure (9) includes a spiral water cooling channel (91) arranged outside the stator (8), and the piston sleeve (1) is provided with two pipe joints (92) identical to the two ends of the spiral water cooling channel (91), and the two ends of the stator (8) are sealed to the inner side of the spiral water cooling channel (91).

4. The high-precision grinding machine upper drive spindle according to claim 1, characterized in that: An O-ring (14) is provided between the upper end cover (2), the lower end cover (3) and the piston sleeve (1), and an annular groove corresponding to the O-ring (14) is provided on the upper end cover (2) and the lower end cover (3).

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