Sleeve shaft type eccentric grinding machine tool spindle shaft system

Abstract

The invention provides a sleeve shaft type eccentric grinding machine tool spindle shaft system, belongs to the technical field of grinding machine tools, and solves the problems that in the prior art, a grinding machine tool spindle shaft system is complex in structure, high in manufacturing cost and high in assembly precision requirement. The sleeve shaft driving motor drives the eccentric sleeve shaft to rotate through the sleeve shaft driving gear and the sleeve shaft driven gear, and the eccentric sleeve shaft is provided with a central through hole; one end of the grinding spindle is fixedly connected with an output shaft of the spindle driving motor, the other end of the grinding spindle is fixedly connected with the grinding disc, and the grinding spindle rotationally penetrates through a central through hole of the eccentric sleeve shaft; the central axis of the central through hole and the central axis of the eccentric sleeve shaft are parallel and spaced by a set distance, so that the central axis of the grinding main shaft and the central axis of the eccentric sleeve shaft are parallel and spaced by a set distance. The spindle shaft system of the sleeve shaft type eccentric grinding machine tool is simple in structure and low in requirement for assembly precision.

Description

Technical Field

[0001] The invention belongs to the technical field of grinding machine tools, and in particular relates to a main shaft system of a sleeve-type eccentric grinding machine tool. Background Art

[0002] As one of the core equipment in the manufacturing industry, the technological development level of grinding machinery directly determines the efficiency optimization of industrial production and the improvement of product quality. Among them, the spindle shaft system structure is the core functional unit of the grinding machine tool, and its kinematic characteristics play a decisive role in the performance of the grinding process. In the existing technology, a planetary gear shaft system structure is mostly used. Although this connection method realizes the complication of the motion trajectory of the abrasive particles, this structure has the following disadvantages: First, the structure is complex, including multiple precision gears, such as sun gears, planetary gears, inner ring gears, etc., and multiple precision shafts, such as central spindles, planetary gear shafts, etc., as well as complex planetary carrier structures and a large number of high-precision bearings, which have high manufacturing costs; second, the assembly accuracy requirements are high, and the meshing clearances between each planetary gear and the sun gear and inner ring gear need to be strictly adjusted to be consistent, otherwise it is easy to cause problems such as unbalanced load, vibration, noise and early wear.

[0003] Therefore, there is an urgent need for a grinding machine tool spindle system with a simple structure and low assembly precision requirements. Summary of the Invention

[0004] In view of this, in order to solve the problems of complex structure, high manufacturing cost and high assembly precision requirement of the grinding machine spindle system in the prior art, the present invention proposes a sleeve-type eccentric grinding machine spindle system.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A sleeve-type eccentric grinding machine tool spindle system, comprising: The supporting structure includes an outer shell and a sleeve shaft motor seat and a main shaft motor seat both fixedly arranged on the outer shell; The eccentric sleeve shaft system includes a sleeve shaft drive motor, a sleeve shaft drive gear, a sleeve shaft driven gear and an eccentric sleeve shaft. The sleeve shaft drive motor is fixedly arranged on the sleeve shaft motor seat. The sleeve shaft drive gear is fixedly sleeved on the output shaft of the sleeve shaft drive motor. The sleeve shaft drive gear and the sleeve shaft driven gear are meshed and matched. The sleeve shaft driven gear and the eccentric sleeve shaft are fixedly connected. The eccentric sleeve shaft is rotatably inserted into the outer shell. The eccentric sleeve shaft is provided with a central through hole. The grinding spindle shaft system includes a spindle drive motor, a grinding spindle and a grinding disc. The spindle drive motor is fixedly arranged on the spindle motor seat. One end of the grinding spindle is fixedly connected to the output shaft of the spindle drive motor, and the other end is fixedly connected to the grinding disc. The grinding spindle rotates and passes through the central through hole of the eccentric sleeve shaft. The central axis of the central through hole is parallel to the central axis of the eccentric sleeve and is spaced apart by a set distance, so that the central axis of the grinding spindle is parallel to the central axis of the eccentric sleeve and is spaced apart by a set distance.

[0006] As a preferred solution of the above-mentioned sleeve-type eccentric grinding machine main shaft system, the sleeve-type eccentric grinding machine main shaft system also includes a sliding eccentric coupling, the upper part of the sliding eccentric coupling is fixedly sleeved on the output shaft of the main shaft drive motor, and the lower part of the sliding eccentric coupling is fixedly sleeved on the grinding main shaft.

[0007] As a preferred solution of the above-mentioned sleeve-type eccentric grinding machine spindle shaft system, the sleeve-type eccentric grinding machine spindle shaft system also includes a spindle motor transmission key and a first grinding spindle transmission key, the sliding eccentric coupling and the output shaft of the spindle drive motor are connected through the spindle motor transmission key, and the grinding spindle and the sliding eccentric coupling are connected through the first grinding spindle transmission key.

[0008] As a preferred solution for the above-mentioned sleeve-type eccentric grinding machine main shaft system, the sleeve-type eccentric grinding machine main shaft system also includes an open locking ring and a locking screw. The open locking ring is fixedly arranged on the sleeve driven gear, and the two ends of the opening of the open locking ring are fastened and connected by the locking screw so that the open locking ring is fixedly sleeved on the eccentric sleeve.

[0009] As a preferred solution of the above-mentioned sleeve-type eccentric grinding machine spindle system, the sleeve-type eccentric grinding machine spindle system also includes a first spindle retaining ring, a first cylindrical roller bearing, a thrust ball bearing, a first spindle collar, a second cylindrical roller bearing, a second spindle collar and a second spindle retaining ring. The first cylindrical roller bearing, the thrust ball bearing and the second cylindrical roller bearing are all arranged between the grinding spindle and the eccentric sleeve shaft. The first spindle collar is fixedly sleeved on the grinding spindle, and the second spindle collar is fixedly penetrated into the eccentric sleeve shaft. The first spindle retaining ring is threadedly matched with the upper part of the grinding spindle. The lower end face of the outer ring of the first cylindrical roller bearing contacts the lower end face of the stepped hole on the upper part of the eccentric sleeve shaft. The first The upper end face of the inner ring of the cylindrical roller bearing contacts with the first spindle retaining ring, the end face of the upper seat ring of the thrust ball bearing contacts with the upper end face of the lower stepped hole of the eccentric sleeve shaft, the upper end face of the center ring of the thrust ball bearing contacts with the lower shoulder of the grinding spindle, the lower end face of the center ring contacts with the upper end face of the first spindle collar, the end face of the lower seat ring of the thrust ball bearing contacts with the upper end face of the second spindle collar, the upper end face of the inner ring of the second cylindrical roller bearing contacts with the lower end face of the first spindle collar, the upper end face of the outer ring of the second cylindrical roller bearing contacts with the wall of the lower stepped hole of the second spindle collar, the second spindle retaining ring is threaded with the grinding spindle, and the lower end face of the inner ring of the second cylindrical roller bearing contacts with the second spindle retaining ring.

[0010] As a preferred solution of the above-mentioned sleeve-type eccentric grinding machine main shaft system, the sleeve-type eccentric grinding machine main shaft system also includes a sleeve shaft end cover, which is fixedly arranged on the lower end of the eccentric sleeve shaft, and the grinding main shaft is passed through the sleeve shaft end cover.

[0011] As a preferred solution of the above-mentioned sleeve-type eccentric grinding machine spindle shaft system, the sleeve-type eccentric grinding machine spindle shaft system also includes a grinding disc connector, a second grinding spindle transmission key, a grinding disc connecting pin and a grinding disc connector retaining ring. The grinding disc connector is fixedly connected to the grinding spindle through the second grinding spindle transmission key, the grinding disc connecting pin fixes the grinding disc connector to the grinding disc, and the grinding disc connector retaining ring locks the grinding disc connector by engaging with the grinding spindle thread and abutting against the lower end of the grinding disc connector.

[0012] As a preferred solution of the above-mentioned sleeve-type eccentric grinding machine main shaft system, the sleeve-type eccentric grinding machine main shaft system also includes a sleeve motor transmission key and a fastening screw. The output shaft of the sleeve drive motor is passed through the sleeve drive gear. The sleeve motor transmission key is arranged in a keyway on the output shaft of the sleeve drive motor. The fastening screw squeezes the sleeve motor transmission key by cooperating with the threaded hole on the sleeve drive gear. The sleeve motor transmission key and the fastening screw are arranged vertically.

[0013] As a preferred solution of the above-mentioned sleeve-type eccentric grinding machine main shaft system, the sleeve-type eccentric grinding machine main shaft system also includes a first angular contact ball bearing and a second angular contact ball bearing, and the first angular contact ball bearing and the second angular contact ball bearing are both arranged between the eccentric sleeve and the outer shell, the upper end face of the inner ring of the first angular contact ball bearing contacts with the upper shoulder of the eccentric sleeve, and the lower end face of the outer ring of the first angular contact ball bearing contacts with the lower end face of the upper stepped hole of the outer shell; the lower end face of the inner ring of the second angular contact ball bearing contacts with the lower shoulder of the eccentric sleeve, and the upper end face of the outer ring of the second angular contact ball bearing contacts with the upper end face of the lower stepped hole of the outer shell.

[0014] As a preferred solution for the main shaft system of the above-mentioned sleeve-type eccentric grinding machine, the set distance is 2 mm.

[0015] Compared with the prior art, the present invention provides a sleeve-type eccentric grinding machine tool spindle system with the following beneficial effects: The present invention provides a sleeve-type eccentric grinding machine spindle system. In this sleeve-type eccentric grinding machine spindle system, a spindle drive motor drives the grinding spindle to rotate, which in turn drives the grinding disc to rotate. Thus, the spindle drive motor can drive the grinding spindle and the grinding disc to rotate. The sleeve-type eccentric grinding machine spindle system drives the sleeve-type eccentric grinding machine spindle drive gear to rotate, which in turn drives the sleeve-type eccentric grinding machine driven gear to rotate. Because the grinding spindle rotates through the eccentric sleeve, and the grinding spindle is eccentrically positioned relative to the eccentric sleeve, i.e., the central axis of the grinding spindle is parallel to the central axis of the eccentric sleeve and separated by a set distance, the sleeve-type eccentric grinding machine spindle system can drive the grinding spindle to rotate eccentrically. Therefore, during the grinding process, the axis position of the grinding disc does not remain fixed, but instead changes with the rotation of the grinding disc, complicating the abrasive particle trajectory and effectively avoiding a single trajectory. Furthermore, this sleeve-type eccentric grinding machine spindle system has a simple structure, low manufacturing cost, and low assembly precision requirements, making it easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings: Figure 1 It is a cross-sectional view of the main shaft system of the sleeve-type eccentric grinding machine provided by a specific embodiment of the present invention; Figure 2 It is a structural schematic diagram of the main shaft system of a sleeve-type eccentric grinding machine provided by a specific embodiment of the present invention; Figure 3 yes Figure 1 Schematic diagram of the structure at A in the middle; Figure 4 This is an assembly diagram of a grinding disc connector, a grinding disc connecting pin, and a grinding spindle of a sleeve-type eccentric grinding machine spindle shaft system provided by a specific embodiment of the present invention; Figure 5 It is a structural schematic diagram of the grinding disc connecting pin of the main shaft system of the sleeve-type eccentric grinding machine provided by a specific embodiment of the present invention; Figure 6 It is a structural schematic diagram of a grinding disc connector of a sleeve-type eccentric grinding machine main shaft system provided by a specific embodiment of the present invention; Figure 7 It is a structural schematic diagram of the grinding disk of the main shaft system of the sleeve-type eccentric grinding machine provided by a specific embodiment of the present invention.

[0017] In the picture: 1. Outer shell; 2. Sleeve shaft motor seat; 3. Spindle motor seat; 4. Sleeve shaft drive motor; 5. Sleeve shaft drive gear; 6. Sleeve shaft driven gear; 7. Eccentric sleeve shaft; 8. Spindle drive motor; 9. Grinding spindle; 10. Grinding disc; 11. First angular contact ball bearing; 12. Second angular contact ball bearing; 13. Sleeve shaft motor drive key; 14. Fastening screw; 15. Sliding eccentric coupling; 16. Spindle motor drive key; 17. First grinding spindle drive key; 18. First spindle retaining ring; 19. First cylindrical roller bearing; 20. Second cylindrical roller bearing; 21. Thrust ball bearing; 22. First spindle collar; 23. Second spindle collar; 24. Second spindle retaining ring; 25. Sleeve end cover; 26. Fixing screw; 27. Second grinding spindle drive key; 28. Grinding disc connector retaining ring; 29. ​​Grinding disc connector; 30. Grinding disc connecting pin; 31. Open locking ring; 291. Groove; 292. Channel; 101. Bump. DETAILED DESCRIPTION

[0018] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments of the present invention and the features therein can be combined with each other in the absence of conflict, and the embodiments described are only part of the embodiments of the present invention, not all of the embodiments.

[0019] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0020] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0021] In the description of this embodiment, terms such as "upper," "lower," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0022] See also Figure 1-7 Description of this embodiment: The present invention provides a sleeve-type eccentric grinding machine tool spindle shaft system, which includes a supporting structure, an eccentric sleeve shaft system and a grinding spindle shaft system. The supporting structure includes an outer shell 1 and a sleeve motor base 2 and a spindle motor base 3, both of which are fixedly arranged on the outer shell 1; the eccentric sleeve shaft system includes a sleeve drive motor 4, a sleeve drive gear 5, a sleeve driven gear 6 and an eccentric sleeve shaft 7. The sleeve drive motor 4 is fixedly arranged on the sleeve motor base 2, the sleeve drive gear 5 is fixedly sleeved on the output shaft of the sleeve drive motor 4, the sleeve drive gear 5 and the sleeve driven gear 6 are meshed and matched, and the sleeve driven gear 6 is engaged with each other. The eccentric sleeve 7 is fixedly connected to the outer shell 1 and rotatably extends through the eccentric sleeve 7. The eccentric sleeve 7 has a central through-hole. The grinding spindle system includes a spindle drive motor 8, a grinding spindle 9, and a grinding disc 10. The spindle drive motor 8 is fixedly mounted on the spindle motor base 3. One end of the grinding spindle 9 is fixedly connected to the output shaft of the spindle drive motor 8, and the other end is fixedly connected to the grinding disc 10. The grinding spindle 9 rotatably extends through the central through-hole of the eccentric sleeve 7. The central axis of the central through-hole is parallel to the central axis of the eccentric sleeve 7 and is separated by a set distance, thereby ensuring that the central axis of the grinding spindle 9 is parallel to the central axis of the eccentric sleeve 7 and is separated by a set distance. The spindle motor base 3 is fixedly connected to the outer shell 1 via a fixing screw 26.

[0023] In the main shaft system of this sleeve-type eccentric grinding machine, the main shaft drive motor 8 drives the grinding main shaft 9 to rotate, and the grinding main shaft 9 drives the grinding disc 10 to rotate, so that the main shaft drive motor 8 can drive the grinding main shaft 9 and the grinding disc 10 to rotate. The sleeve drive motor 4 drives the sleeve drive gear 5 to rotate, and the sleeve drive gear 5 drives the sleeve driven gear 6 to rotate, and the sleeve driven gear 6 drives the eccentric sleeve shaft 7 to rotate. Because the grinding main shaft 9 is rotated and penetrates the eccentric sleeve shaft 7, and the grinding main shaft 9 is eccentrically arranged relative to the eccentric sleeve shaft 7, that is, the central axis of the grinding main shaft 9 is parallel to the central axis of the eccentric sleeve shaft 7 and is separated by a set distance, the sleeve drive motor 4 can drive the grinding main shaft 9 to rotate eccentrically through the eccentric sleeve shaft 7. Therefore, during the grinding process, the axis position of the grinding disc 10 will not be fixed, but will change with the rotation of the grinding disc 10, making the trajectory of the abrasive particles complicated and effectively avoiding the simplification of the trajectory. Moreover, the main shaft system of the sleeve-type eccentric grinding machine has a simple structure, low manufacturing cost, low requirements on assembly precision, and is easy to assemble.

[0024] In this embodiment, the set distance is 2 mm, that is, the central axis of the grinding spindle 9 is parallel to the central axis of the eccentric sleeve shaft 7 and the distance between them is 2 mm.

[0025] Optionally, the sleeve-type eccentric grinding machine main shaft system further includes a sliding eccentric coupling 15, the upper portion of the sliding eccentric coupling 15 being fixedly sleeved on the output shaft of the main shaft drive motor 8, and the lower portion of the sliding eccentric coupling 15 being fixedly sleeved on the grinding main shaft 9. The output shaft of the main shaft drive motor 8 and the grinding main shaft 9 are connected via the sliding eccentric coupling 15.

[0026] Optionally, the spindle shaft system of the sleeve-type eccentric grinding machine also includes a spindle motor transmission key 16 and a first grinding spindle transmission key 17. The sliding eccentric coupling 15 is connected to the output shaft of the spindle drive motor 8 through the spindle motor transmission key 16, and the grinding spindle 9 is connected to the sliding eccentric coupling 15 through the first grinding spindle transmission key 17.

[0027] Optionally, the main shaft system of the sleeve-type eccentric grinding machine further includes a sleeve motor transmission key 13 and a fastening screw 14. The output shaft of the sleeve drive motor 4 is passed through the sleeve drive gear 5. The sleeve motor transmission key 13 is disposed in a keyway on the output shaft of the sleeve drive motor 4. The fastening screw 14 compresses the sleeve motor transmission key 13 by engaging with a threaded hole on the sleeve drive gear 5. The sleeve motor transmission key 13 and the fastening screw 14 are disposed perpendicularly. The sleeve motor transmission key 13 can fix the circumferential position of the sleeve drive gear 5 and the output shaft of the sleeve drive motor 4. The fastening screw 14 can compress the sleeve motor transmission key 13, thereby fixing the axial position of the sleeve drive gear 5.

[0028] Optionally, the spindle shaft system of the sleeve-type eccentric grinding machine further includes an open locking collar 31 and a locking screw. The open locking collar 31 is fixedly mounted on the sleeve driven gear 6. The two ends of the open end of the open locking collar 31 are fastened together by the locking screw so that the open locking collar 31 is fixedly sleeved on the eccentric sleeve 7. The sleeve driven gear 6 is connected to the eccentric sleeve 7 by the open locking collar 31 and the locking screw.

[0029] Optionally, the spindle shaft system of the sleeve-type eccentric grinding machine tool further includes a first spindle retaining ring 18, a first cylindrical roller bearing 19, a thrust ball bearing 21, a first spindle collar 22, a second cylindrical roller bearing 20, a second spindle collar 23 and a second spindle retaining ring 24. The first cylindrical roller bearing 19, the thrust ball bearing 21 and the second cylindrical roller bearing 20 are all arranged between the grinding spindle 9 and the eccentric sleeve shaft 7. The first spindle collar 22 is fixedly sleeved on the grinding spindle 9, and the second spindle collar 23 is fixedly penetrated into the eccentric sleeve shaft 7. The first spindle retaining ring 18 is threadedly engaged with the upper part of the grinding spindle 9. The lower end face of the outer ring of the first cylindrical roller bearing 19 contacts the lower end face of the stepped hole on the upper part of the eccentric sleeve shaft 7. The upper end face of the inner ring contacts the first spindle retaining ring 18, the upper seat ring end face of the thrust ball bearing 21 contacts the upper end face of the lower stepped hole of the eccentric sleeve 7, the upper end face of the center ring of the thrust ball bearing 21 contacts the lower shoulder of the grinding spindle 9, the lower end face of the center ring contacts the upper end face of the first spindle collar 22, the lower seat ring end face of the thrust ball bearing 21 contacts the upper end face of the second spindle collar 23, the upper end face of the inner ring of the second cylindrical roller bearing 20 contacts the lower end face of the first spindle collar 22, the upper end face of the outer ring of the second cylindrical roller bearing 20 contacts the lower stepped hole wall of the second spindle collar 23, the second spindle retaining ring 24 is threadedly matched with the grinding spindle 9, and the lower end face of the inner ring of the second cylindrical roller bearing 20 contacts the second spindle retaining ring 24.

[0030] The first cylindrical roller bearing 19 contacts the journal of the grinding spindle 9 and the lower end face of the stepped hole on the upper part of the eccentric sleeve shaft 7, transmitting the radial force of the eccentric movement of the grinding spindle 9. The first spindle retaining ring 18 locks the first cylindrical roller bearing 19 by cooperating with the upper thread of the grinding spindle 9; the upper race end face of the first thrust ball bearing 21 contacts the end face of the lower stepped hole of the eccentric sleeve shaft 7, the upper end face of the middle shaft ring contacts the lower shoulder of the grinding spindle 9, and the lower end face of the middle shaft ring contacts the upper end face of the first spindle shaft ring 22 The end face of the lower seat ring contacts the upper end face of the second spindle collar 23; the first spindle collar 22 is sleeved on the lower journal of the grinding spindle 9 and contacts the upper end face of the inner ring of the second cylindrical roller bearing 20. The second cylindrical roller bearing 20 is sleeved on the lower journal of the grinding spindle 9 and contacts the lower stepped hole wall of the second spindle collar 23 to transmit the radial force of the eccentric movement of the grinding spindle 9. The second spindle retaining ring 24 cooperates with the thread on the journal of the grinding spindle 9 to lock the inner ring of the second cylindrical roller bearing 20.

[0031] Optionally, the spindle shaft system of the sleeve-type eccentric grinding machine tool further includes a first angular contact ball bearing 11 and a second angular contact ball bearing 12. The first angular contact ball bearing 11 and the second angular contact ball bearing 12 are both arranged between the eccentric sleeve shaft 7 and the outer shell 1. The upper end face of the inner ring of the first angular contact ball bearing 11 contacts the upper shoulder of the eccentric sleeve shaft 7, and the lower end face of the outer ring of the first angular contact ball bearing 11 contacts the lower end face of the upper stepped hole of the outer shell 1; the lower end face of the inner ring of the second angular contact ball bearing 12 contacts the lower shoulder of the eccentric sleeve shaft 7, and the upper end face of the outer ring of the second angular contact ball bearing 12 contacts the upper end face of the lower stepped hole of the outer shell 1. The first angular contact ball bearing 11 and the second angular contact ball bearing 12 can transmit the axial force generated during the grinding process. Optionally, the spindle system of the sleeve-type eccentric grinding machine also includes a sleeve end cap 25, which is fixedly mounted on the lower end of the eccentric sleeve 7. The grinding spindle 9 passes through the sleeve end cap 25. The sleeve end cap 25 not only serves as a limiter, but also abuts the sleeve end cap 25 with the lower end of the inner ring of the second angular contact ball bearing 12, transmitting the axial force generated during the grinding process. The lower end of the outer ring of the second cylindrical roller bearing 20 abuts the sleeve end cap 25. The sleeve end cap 25 also prevents debris from entering the interior of the eccentric sleeve 7 during the grinding and other processes.

[0032] Optionally, the spindle shaft system of the sleeve-type eccentric grinding machine also includes a grinding disc connector 29, a second grinding spindle transmission key 27, a grinding disc connecting pin 30 and a grinding disc connector retaining ring 28. The grinding disc connector 29 is fixedly connected to the grinding spindle 9 through the second grinding spindle transmission key 27. The grinding disc connecting pin 30 fixedly connects the grinding disc connector 29 to the grinding disc 10. The grinding disc connector retaining ring 28 locks the grinding disc connector 29 by threaded engagement with the grinding spindle 9 and abutting against the lower end of the grinding disc connector 29.

[0033] The grinding spindle 9 transmits rotational motion to the grinding disc connector 29 via the second grinding spindle transmission key 27. A connecting protrusion 101 is provided in the middle of the grinding disc 10. It is understood that the protrusion 101 and the grinding disc 10 are integrally formed. The grinding disc connector 29 is provided with a groove 291 and a channel 292 that passes through the lower end. The protrusion 101 moves upward from the channel 292 in the vertical direction and then moves circumferentially into the groove 291. The protrusion 101 is located in the groove 291. The grinding disc connecting pin 30 is connected through the pin hole of the grinding disc connector 29 and is connected to the pin hole on the protrusion 101 in the middle of the grinding disc 10. It can be located to connect the grinding disc 10 to the grinding disc connector 29 and transmit rotational motion.

[0034] Obviously, the embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The embodiments do not describe all details in detail, nor do they limit the invention to the specific embodiments described. Numerous modifications and variations are possible based on the contents of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. It is not necessary and impossible to list all embodiments here.

Claims

1. A sleeve-type eccentric grinding machine tool spindle system, characterized in that: include: A supporting structure comprising an outer shell (1) and a sleeve shaft motor seat (2) and a main shaft motor seat (3) both fixedly arranged on the outer shell (1); An eccentric sleeve shaft system comprises a sleeve shaft driving motor (4), a sleeve shaft driving gear (5), a sleeve shaft driven gear (6) and an eccentric sleeve shaft (7); the sleeve shaft driving motor (4) is fixedly arranged on a sleeve shaft motor base (2); the sleeve shaft driving gear (5) is fixedly sleeved on an output shaft of the sleeve shaft driving motor (4); the sleeve shaft driving gear (5) and the sleeve shaft driven gear (6) are meshed and matched; the sleeve shaft driven gear (6) and the eccentric sleeve shaft (7) are fixedly connected; the eccentric sleeve shaft (7) is rotatably arranged in an outer shell (1); and the eccentric sleeve shaft (7) is provided with a central through hole; The grinding spindle shaft system comprises a spindle drive motor (8), a grinding spindle (9) and a grinding disc (10). The spindle drive motor (8) is fixedly arranged on the spindle motor seat (3). One end of the grinding spindle (9) is fixedly connected to the output shaft of the spindle drive motor (8), and the other end is fixedly connected to the grinding disc (10). The grinding spindle (9) rotates and passes through the central through hole of the eccentric sleeve shaft (7). The central axis of the central through hole is parallel to the central axis of the eccentric sleeve (7) and is spaced apart by a set distance, thereby making the central axis of the grinding spindle (9) parallel to the central axis of the eccentric sleeve (7) and spaced apart by a set distance.

2. The main shaft system of the sleeve-type eccentric grinding machine according to claim 1 is characterized in that: It also includes a sliding eccentric coupling (15), the upper part of the sliding eccentric coupling (15) is fixedly sleeved on the output shaft of the spindle drive motor (8), and the lower part of the sliding eccentric coupling (15) is fixedly sleeved on the grinding spindle (9).

3. The main shaft system of the sleeve-type eccentric grinding machine according to claim 2, characterized in that: It also includes a spindle motor transmission key (16) and a first grinding spindle transmission key (17), wherein the sliding eccentric coupling (15) is connected to the output shaft of the spindle drive motor (8) via the spindle motor transmission key (16), and the grinding spindle (9) is connected to the sliding eccentric coupling (15) via the first grinding spindle transmission key (17).

4. The main shaft system of the sleeve-type eccentric grinding machine according to claim 1, characterized in that: The invention also includes an open locking ring (31) and a locking screw. The open locking ring (31) is fixedly arranged on the sleeve driven gear (6). The two ends of the opening of the open locking ring (31) are fastened together by the locking screw so that the open locking ring (31) is fixedly sleeved on the eccentric sleeve (7).

5. The main shaft system of the sleeve-type eccentric grinding machine according to claim 1 is characterized in that: The grinding spindle (9) and the eccentric sleeve (7) are provided with a first main shaft retaining ring (18), a first cylindrical roller bearing (19), a thrust ball bearing (21), a first main shaft collar (22), a second cylindrical roller bearing (20), a second main shaft collar (23) and a second main shaft retaining ring (24). The first cylindrical roller bearing (19), the thrust ball bearing (21) and the second cylindrical roller bearing (20) are all arranged between the grinding spindle (9) and the eccentric sleeve (7). The first main shaft collar (22) is fixedly sleeved on the grinding spindle (9), and the second main shaft collar (23) is fixedly penetrated through the eccentric sleeve (7). The first main shaft retaining ring (18) is threadedly matched with the upper part of the grinding spindle (9). The lower end face of the outer ring of the first cylindrical roller bearing (19) contacts the lower end face of the stepped hole on the upper part of the eccentric sleeve (7). The upper end of the inner ring of the first cylindrical roller bearing (19) is in contact with the lower end face of the stepped hole on the upper part of the eccentric sleeve (7). The upper end face of the thrust ball bearing (21) contacts the upper end face of the lower stepped hole of the eccentric sleeve (7), the upper end face of the center ring of the thrust ball bearing (21) contacts the lower shoulder of the grinding spindle (9), the lower end face of the center ring contacts the upper end face of the first spindle shaft ring (22), the lower end face of the thrust ball bearing (21) contacts the upper end face of the second spindle shaft ring (23), the upper end face of the inner ring of the second cylindrical roller bearing (20) contacts the lower end face of the first spindle shaft ring (22), the upper end face of the outer ring of the second cylindrical roller bearing (20) contacts the wall of the lower stepped hole of the second spindle shaft ring (23), the second spindle retaining ring (24) is threadedly matched with the grinding spindle (9), and the lower end face of the inner ring of the second cylindrical roller bearing (20) contacts the second spindle retaining ring (24).

6. The main shaft system of the sleeve-type eccentric grinding machine according to claim 1, characterized in that: The invention also comprises a sleeve shaft end cover (25), which is fixedly arranged on the lower end of the eccentric sleeve shaft (7), and the grinding main shaft (9) is passed through the sleeve shaft end cover (25).

7. The main shaft system of the sleeve-type eccentric grinding machine according to claim 1, characterized in that: The invention also includes a grinding disc connector (29), a second grinding spindle transmission key (27), a grinding disc connecting pin (30) and a grinding disc connector retaining ring (28). The grinding disc connector (29) is fixedly connected to the grinding spindle (9) through the second grinding spindle transmission key (27). The grinding disc connecting pin (30) fixes the grinding disc connector (29) to the grinding disc (10). The grinding disc connector retaining ring (28) is threadedly engaged with the grinding spindle (9) and abuts against the lower end of the grinding disc connector (29) to lock the grinding disc connector (29).

8. The main shaft system of the sleeve-type eccentric grinding machine according to claim 1, characterized in that: The invention also includes a sleeve motor transmission key (13) and a fastening screw (14), wherein the output shaft of the sleeve drive motor (4) is passed through the sleeve drive gear (5), the sleeve motor transmission key (13) is arranged in a keyway on the output shaft of the sleeve drive motor (4), and the fastening screw (14) is pressed against the sleeve motor transmission key (13) by cooperating with the threaded hole on the sleeve drive gear (5), and the sleeve motor transmission key (13) and the fastening screw (14) are arranged vertically.

9. The main shaft system of the sleeve-type eccentric grinding machine according to claim 1, characterized in that: The invention also includes a first angular contact ball bearing (11) and a second angular contact ball bearing (12), wherein the first angular contact ball bearing (11) and the second angular contact ball bearing (12) are both arranged between the eccentric sleeve shaft (7) and the outer shell (1), wherein the upper end face of the inner ring of the first angular contact ball bearing (11) contacts the upper shaft shoulder of the eccentric sleeve shaft (7), and the lower end face of the outer ring of the first angular contact ball bearing (11) contacts the lower end face of the upper stepped hole of the outer shell (1); the lower end face of the inner ring of the second angular contact ball bearing (12) contacts the lower shaft shoulder of the eccentric sleeve shaft (7), and the upper end face of the outer ring of the second angular contact ball bearing (12) contacts the upper end face of the lower stepped hole of the outer shell (1).

10. The main shaft system of the sleeve-type eccentric grinding machine according to claim 1, characterized in that: The set distance is 2 mm.

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