High-speed and high-precision grinding machine main shaft

Abstract

The utility model discloses a high-speed high-precision grinding machine main shaft, which relates to the field of grinding machine main shafts and comprises a shaft body, a shaft sleeve and two sealing heads are sleeved at the outer end of the shaft body, a movable sleeve is arranged at the outer end of the shaft body and is movably connected with the movable sleeve through a bearing, and a fixed disc is fixedly arranged at the outer end of the movable sleeve. An end cover is arranged on the side, away from the shaft sleeve, of the fixing disc through a bolt, elastic assemblies are arranged on the two sides, close to the movable sleeve, of the sealing head, and each elastic assembly comprises a fixing base fixedly arranged at the outer end of the sealing head. One end of the shaft body is fixed on the movable sleeve, if the shaft body extends due to thermal expansion, the shaft body drives the movable sleeve to move and enables the guide rod to move relative to the fixed seat, so that the guide rod pulls the end piece and compresses the spring, and the expansion of the shaft body is buffered by utilizing the elastic force of the spring; damage to the whole grinding machine main shaft structure caused by thermal expansion of the shaft body is avoided.

Description

Technical Field

[0001] The utility model relates to the field of grinding machine spindles, in particular to a high-speed and high-precision grinding machine spindle. Background Art

[0002] A grinder is a commonly used processing equipment in the prior art. By driving grinding tools such as grinding wheels and grinding belts to operate at high speed, it can grind off the excess corners on the workpiece, and can also grind the rough parts of the workpiece surface to make its surface smoother.

[0003] The grinder spindle is an important component of the grinder, which is responsible for driving the grinding wheel to rotate and completing the grinding process of the workpiece. The grinder spindle is usually composed of a spindle, bearings, transmission parts and other parts. Depending on different usage requirements and working conditions, the structure and performance of the grinder spindle are also different.

[0004] In the prior art, the main shaft of a grinding machine is generally installed inside a sleeve, and two ends of the main shaft are respectively connected to two ends of the sleeve through bearings, such as a main shaft structure of a grinding machine with publication number CN205734427U.

[0005] Since the grinding machine spindle needs to rotate at high speed for a long time, frictional heat will inevitably occur. The grinding machine spindle made of metal is fixed in the sleeve, which will limit its expansion and easily cause damage to the structure of the grinding machine spindle. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a high-speed and high-precision grinding machine spindle, which will drive the movable sleeve to move and cause the guide rod to move relative to the fixed seat through the shaft body. The guide rod thereby pulls the end plate and compresses the spring. The elastic force of the spring is used to buffer the expansion of the shaft body, thereby preventing the shaft body from expanding due to heat and causing damage to the entire grinding machine spindle structure, thereby effectively solving the problems in the background technology.

[0007] To achieve the above purpose, the technical solution adopted by the utility model is: a high-speed and high-precision grinding machine spindle, including a shaft body, the outer end sleeve of the shaft body is provided with a shaft sleeve and two sealing heads, the two sealing heads are respectively fixed at the two ends of the shaft sleeve, and the outer end of the shaft body is provided with a moving sleeve and is movably connected with the moving sleeve through a bearing;

[0008] A fixed plate is fixedly provided at the outer end of the movable sleeve, an end cover is provided on the side of the fixed plate away from the shaft sleeve through bolts, and elastic components are provided on both sides of the sealing head close to the movable sleeve, and the elastic component includes a fixed seat fixedly provided at the outer end of the sealing head;

[0009] The fixing seat is provided with a guide rod penetrating the fixing seat, one end of the guide rod is fixedly connected to the fixing plate on the movable sleeve, the other end of the guide rod is fixedly provided with an end piece, a spring is provided between the end piece and the fixing seat and connected through the spring.

[0010] Furthermore, a bellows with telescopic function is provided between the sealing head close to the movable sleeve and the movable sleeve, and the sealing head and the movable sleeve are connected through the bellows.

[0011] Furthermore, the sealing head away from the movable sleeve is movably connected to the shaft body through a bearing, and a fixed plate is also fixedly provided at the outer end of the sealing head. The side of the fixed plate away from the sleeve is also provided with an end cover through bolts, so as to fix the shaft body to the sleeve and the sealing head.

[0012] Furthermore, an annular groove is provided on the inner wall of the sealing head, an external channel communicating with the inside of the annular groove is provided on the sealing head, and a threaded ring communicating with the external channel is fixedly provided at the outer end of the sealing head;

[0013] A sealing cover is arranged at the top of the threaded ring through a threaded sleeve, and an oil delivery pipe with a valve is fixedly arranged at the outer end of the sealing cover, so as to input the hydraulic oil into the annular groove.

[0014] Furthermore, a rubber ring is embedded on the inner wall of the sealing head, the outer side of the rubber ring closes the annular groove, the inner side of the rubber ring contacts the outer end of the shaft body, and mounting rings are fixed at both ends of the rubber ring. The mounting rings are detachably embedded on the inner wall of the sealing head, and the rubber ring plays a sealing role between the sealing head and the shaft body.

[0015] Furthermore, an external pipe is fixedly provided at the outer end of the shaft sleeve, and a sealing bolt is threadedly provided at the open end of the external pipe, so that lubricating oil can be input into the interior of the shaft body through the external pipe.

[0016] Compared with the prior art, the utility model provides a high-speed and high-precision grinding machine spindle, which has the following beneficial effects:

[0017] 1. By fixing one end of the shaft body on the movable sleeve, if the shaft body is elongated due to thermal expansion, the shaft body will drive the movable sleeve to move and make the guide rod move relative to the fixed seat. The guide rod will pull the end plate and compress the spring. The elastic force of the spring is used to buffer the expansion of the shaft body, avoiding the damage of the entire grinder spindle structure caused by the thermal expansion of the shaft body.

[0018] 2. By inputting hydraulic oil into the annular groove, the oil pressure can be adjusted while ensuring sealing, and then the contact strength between the rubber ring and the shaft can be flexibly adjusted to avoid excessive resistance to shaft rotation due to excessive contact strength between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the overall structure diagram of the utility model;

[0020] Figure 2 It is a top sectional view of the utility model;

[0021] Figure 3 For the utility model Figure 2 Enlarged view of part A in the middle;

[0022] Figure 4 For the utility model Figure 2 Enlarged view of middle part B;

[0023] Figure 5 It is a side sectional view of the sealing head of the utility model;

[0024] Figure 6 This is the internal structure diagram of the external pipe of the utility model.

[0025] In the figure: 1. shaft body; 2. shaft sleeve; 3. sealing head; 4. sealing cover; 5. elastic component; 501. fixing seat; 502. end piece; 503. guide rod; 504. spring; 6. end cover; 7. sealing bolt; 8. annular groove; 9. rubber ring; 10. external channel; 11. external tube; 12. mounting ring; 13. bellows; 14. movable sleeve; 15. bearing; 16. fixed plate. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention will be further described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figure 1-6 As shown, the utility model provides a high-speed and high-precision grinding machine spindle, including a shaft body 1, the outer end of the shaft body 1 is sleeved with a shaft sleeve 2 and two sealing heads 3, the two sealing heads 3 are respectively fixed at both ends of the shaft sleeve 2, and the outer end of the shaft body 1 is provided with a moving sleeve 14 and is movably connected to the moving sleeve 14 through a bearing 15;

[0028] A fixed plate 16 is fixedly disposed at the outer end of the movable sleeve 14, and an end cover 6 is disposed on the side of the fixed plate 16 away from the shaft sleeve 2 through bolts. Elastic components 5 are disposed on both sides of the sealing head 3 close to the movable sleeve 14, and the elastic components 5 include a fixed seat 501 fixedly disposed at the outer end of the sealing head 3;

[0029] The fixed seat 501 is provided with a guide rod 503 which passes through the fixed seat 501 , one end of the guide rod 503 is fixedly connected to the fixed plate 16 on the movable sleeve 14 , the other end of the guide rod 503 is fixedly provided with an end piece 502 , a spring 504 is provided between the end piece 502 and the fixed seat 501 and connected through the spring 504 .

[0030] A bellows 13 with a telescopic function is provided between the sealing head 3 close to the moving sleeve 14 and the moving sleeve 14 , and the sealing head 3 and the moving sleeve 14 are connected via the bellows 13 .

[0031] One end of the shaft body 1 is fixed on the movable sleeve 14, and the movable sleeve 14 is connected to one of the sealing heads 3 through the bellows 13. The bellows 13 can be retracted. When the shaft body 1 generates heat and expands due to friction during use, the shaft body 1 will stretch and drive the movable sleeve 14 to move, and the bellows 13 will also stretch. At the same time, the movement of the movable sleeve 14 will drive the guide rod 503 to move relative to the fixed seat 501. The guide rod 503 will pull the end piece 502 and compress the spring 504. The elastic force of the spring 504 is used to buffer the expansion of the shaft body 1 to prevent the shaft body 1 from expanding due to heat and causing damage to the entire grinder spindle structure.

[0032] One end of the shaft body 1 is connected and fixed to the shaft sleeve 2, such as Figure 1 , 2 As shown, the sealing head 3 away from the movable sleeve 14 is movably connected to the shaft body 1 through a bearing 15, and a fixed plate 16 is also fixedly provided at the outer end of the sealing head 3. The side of the fixed plate 16 away from the sleeve 2 is also provided with an end cover 6 by bolts, so as to fix the shaft body 1 to the sleeve 2 and the sealing head 3.

[0033] The shaft body 1 is movably connected to the sealing head 3 away from the movable sleeve 14 through the bearing 15. The outer ring width of the bearing 15 is greater than the inner ring. The inner ring of the bearing 15 located at the sealing head 3 is fixed to the outer end of the shaft body 1, and the outer ring is embedded in the inner side of the sealing head 3. An end cover 6 is provided through a fixed disk 16 on the sealing head 3. The end cover 6 restricts and fixes the bearing 15 to the inner side of the sealing head 3, thereby connecting and fixing one end of the shaft body 1 to the sealing head 3.

[0034] The shaft body 1 needs to be sealed during use, such as Figure 2 , 4 As shown in , 5, an annular groove 8 is provided on the inner wall of the sealing head 3, an external channel 10 communicating with the inner part of the annular groove 8 is provided on the sealing head 3, and a threaded ring communicating with the external channel 10 is fixedly provided at the outer end of the sealing head 3;

[0035] A sealing cover 4 is provided at the top of the threaded ring through a threaded sleeve, and an oil delivery pipe with a valve is fixedly provided at the outer end of the sealing cover 4 so as to input the hydraulic oil into the annular groove 8 .

[0036] A rubber ring 9 is embedded on the inner wall of the sealing head 3, and the outer side of the rubber ring 9 closes the annular groove 8. The inner side of the rubber ring 9 contacts the outer end of the shaft body 1. Mounting rings 12 are fixed at both ends of the rubber ring 9. The mounting rings 12 are detachably embedded in the inner wall of the sealing head 3. The rubber ring 9 plays a sealing role between the sealing head 3 and the shaft body 1.

[0037] The rubber ring 9 is embedded in the annular groove 8 on the inner wall of the sealing head 3, and the hydraulic oil is injected into the sealing cover 4. The hydraulic oil entering the sealing cover 4 flows into the annular groove 8 through the external channel 10. The rubber ring 9 is pushed by the oil pressure of the hydraulic oil so that the rubber ring 9 is in close contact with the shaft body 1, which can play a sealing role. The oil pressure can also be adjusted under the premise of ensuring the sealing, and then the contact strength between the rubber ring 9 and the shaft body 1 can be flexibly adjusted to avoid excessive resistance to the rotation of the shaft body 1 due to excessive contact strength between the two.

[0038] In order to reduce the friction during the rotation of the shaft 1, Figure 1 , 6 As shown, an external pipe 11 is fixedly provided at the outer end of the shaft sleeve 2 , and a sealing bolt 7 is threadedly provided at the open end of the external pipe 11 , and lubricating oil can be input into the shaft body 1 through the external pipe 11 .

[0039] Lubricating oil is input into the shaft sleeve 2 through the external pipe 11. During the high-speed rotation of the shaft body 1, the lubricating oil can be located between the shaft body 1 and the shaft sleeve 2 and form an oil film between the two to play a lubricating role, greatly reducing the wear of the shaft body 1 during use.

[0040] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A high-speed and high-precision grinding machine spindle, comprising a shaft body (1), wherein the shaft body (1) is provided with a shaft sleeve (2) and two sealing heads (3) at the outer end thereof, wherein the two sealing heads (3) are respectively fixedly arranged at the two ends of the shaft sleeve (2), wherein: The outer end of the shaft body (1) is provided with a movable sleeve (14) and is movably connected to the movable sleeve (14) via a bearing (15); A fixed plate (16) is fixedly provided at the outer end of the movable sleeve (14); an end cover (6) is provided on the side of the fixed plate (16) away from the shaft sleeve (2) through bolts; elastic components (5) are provided on both sides of the sealing head (3) close to the movable sleeve (14); the elastic component (5) includes a fixed seat (501) fixedly provided at the outer end of the sealing head (3); The fixed seat (501) is provided with a guide rod (503) penetrating the fixed seat (501); one end of the guide rod (503) is fixedly connected to a fixed plate (16) on the movable sleeve (14); the other end of the guide rod (503) is fixedly provided with an end plate (502); a spring (504) is provided between the end plate (502) and the fixed seat (501) and connected via the spring (504).

2. A high-speed and high-precision grinding machine spindle according to claim 1, characterized in that: A bellows (13) with telescopic function is provided between the sealing head (3) close to the moving sleeve (14) and the moving sleeve (14); the sealing head (3) and the moving sleeve (14) are connected via the bellows (13).

3. The high-speed and high-precision grinding machine spindle according to claim 1, characterized in that: The sealing head (3) away from the movable sleeve (14) is movably connected to the shaft body (1) via a bearing (15); a fixed disk (16) is also fixedly provided at the outer end of the sealing head (3); and an end cover (6) is also provided on the side of the fixed disk (16) away from the shaft sleeve (2) via bolts.

4. The high-speed and high-precision grinding machine spindle according to claim 1, characterized in that: An annular groove (8) is provided on the inner wall of the sealing head (3), an external channel (10) communicating with the inside of the annular groove (8) is provided on the sealing head (3), and a threaded ring communicating with the external channel (10) is fixedly provided at the outer end of the sealing head (3); A sealing cover (4) is provided at the top of the threaded ring via a threaded sleeve, and an oil delivery pipe with a valve is fixedly provided at the outer end of the sealing cover (4).

5. A high-speed and high-precision grinding machine spindle according to claim 4, characterized in that: A rubber ring (9) is embedded on the inner wall of the sealing head (3); the outer side of the rubber ring (9) closes the annular groove (8); the inner side of the rubber ring (9) contacts the outer end of the shaft body (1); mounting rings (12) are fixedly provided at both ends of the rubber ring (9); the mounting rings (12) are detachably embedded on the inner wall of the sealing head (3).

6. The high-speed and high-precision grinding machine spindle according to claim 1, characterized in that: An external pipe (11) is fixedly provided at the outer end of the shaft sleeve (2), and a sealing bolt (7) is threadedly provided at the open end of the external pipe (11).

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