Electric spindle with good sealing performance

Abstract

The electric spindle comprises a machine body and a spindle rotationally arranged in the machine body, a front end cover block is arranged on the spindle in the circumferential direction, a sealing ring block is arranged on the machine body, the sealing ring block is in clearance fit with the front end cover block, and a first protruding block is arranged on the side, close to the machine body, of the front end cover block in the circumferential direction; the sealing ring block is provided with a first rotating groove for containing the first protruding block, the side, close to the front end cover block, of the sealing ring block is provided with a second protruding block in the circumferential direction, and the front end cover block is provided with a second rotating groove for containing the second protruding block. A fixing ring block is arranged on the sealing ring block, a plurality of through holes allowing bolts to penetrate through are formed in the fixing ring block in the circumferential direction, the fixing ring block and the sealing ring block are fixed to the machine body through the bolts, a cover plate is arranged on the front end cover block in the circumferential direction, and the outer diameter of the cover plate is located on the sealing ring block. The electric spindle has the advantages that the sealing performance of the electric spindle is improved, and cooling liquid is not prone to entering the electric spindle.

Description

TECHNICAL FIELD

[0001] The application relates to the field of electric spindle technology, in particular to an electric spindle with good sealing performance. BACKGROUND

[0002] The electric spindle is an important component for driving machine tools, tool machines and the like, and can provide high-speed rotation and precise positioning functions. The electric spindle is provided with a tool at one end to cut, grind and process materials such as metals, plastics and graphite. The electric spindle often needs to spray cooling liquid on the processed parts for cooling during operation. Therefore, the tool end of the electric spindle often needs to be provided with a sealing structure with good sealing performance.

[0003] The common electric spindle sealing device adopts a rotating labyrinth seal. The high-pressure sprayed cooling liquid is used to cool the processed parts. The high-pressure sprayed cooling liquid is easy to splash. The rotating labyrinth seal cannot effectively prevent the cooling liquid from entering, has poor waterproof performance, and still has a small amount of cooling liquid entering the electric spindle, which damages the electric spindle. CONTENT OF THE INVENTION

[0004] In order to improve the sealing performance of the electric spindle and prevent the cooling liquid from entering the electric spindle, the application provides an electric spindle with good sealing performance.

[0005] The application provides an electric spindle with good sealing performance, which adopts the following technical scheme:

[0006] The electric spindle with good sealing performance comprises a machine body and a spindle rotatingly arranged in the machine body. A front end cover block is arranged on the spindle in a circumferential direction. A sealing ring block is arranged on the machine body. The sealing ring block is in clearance fit with the front end cover block. A first protrusion is arranged on the side of the front end cover block close to the machine body in a circumferential direction. A first rotating groove for accommodating the first protrusion is formed in the sealing ring block. The first protrusion is in clearance fit in the first rotating groove, and the first protrusion rotates in the first rotating groove. A second protrusion is arranged on the side of the sealing ring block close to the front end cover block in a circumferential direction. A second rotating groove for accommodating the second protrusion is formed in the front end cover block. The second protrusion is in clearance fit in the second rotating groove, and the second protrusion rotates in the second rotating groove. A fixing ring block is arranged on the sealing ring block. A plurality of through holes for bolts are formed in the fixing ring block in a circumferential direction. The fixing ring block and the sealing ring block are fixed on the machine body by the bolts. A cover plate is arranged on the front end cover block in a circumferential direction. The outer diameter of the cover plate is located on the sealing ring block.

[0007] By adopting the technical scheme, the front end cover block is fixed on the main shaft, the front end cover block is rotatably connected with the sealing ring block through the first protrusion, the main shaft rotates smoothly, and a first waterproof sealing effect is achieved, the second protrusion is matched with the second rotating groove, and the waterproof sealing effect of the electric spindle is further improved, the double sealing effect is achieved, the sealing ring block is fixed by the fixing ring block, the outer diameter of the cover plate is located on the sealing ring block, the cover plate covers the rotating gap between the front end cover block and the sealing ring block, the splashed cooling liquid cannot directly enter the gap between the front end cover block and the sealing ring block, the damage of the electric spindle is avoided, the sealing performance of the electric spindle is improved, and the cooling liquid cannot easily enter the electric spindle.

[0008] Optionally, a rotating block is arranged on the outer diameter of the cover plate in a circumferential direction, the rotating block is located on the fixing ring block, a rotating groove for accommodating the rotating block is arranged on the fixing ring block, and the cover plate is matched with the rotating groove in a gap.

[0009] By adopting the technical scheme, the rotating block on the cover plate is matched with the rotating groove in a gap, and the waterproof effect of the electric spindle is further improved.

[0010] Optionally, an inclined surface is arranged on the outer periphery of the front end cover block, and the inclined surface is inclined to the direction of the second rotating groove along the outer periphery.

[0011] By adopting the technical scheme, the distance from the front end cover block to the first protrusion is increased by the inclined surface, the cooling liquid cannot easily enter the first protrusion, and the waterproof sealing effect of the electric spindle is improved.

[0012] Optionally, a waterproof gasket is further arranged, a waterproof groove is arranged on one side of the front end cover block in a circumferential direction close to the inner diameter of the sealing ring block, and the waterproof gasket is arranged in the waterproof groove.

[0013] By adopting the technical scheme, the waterproof gasket plays a role of the last waterproof layer, and the cooling liquid cannot enter the electric spindle.

[0014] Optionally, a bearing seat is connected to the machine body, a rear end cover block is rotatably arranged on the machine body, and the rear end cover block is arranged at the end of the main shaft away from the front end cover block.

[0015] By adopting the technical scheme, the bearing seat enables the main shaft to stably rotate at a high speed and bear mechanical load and inertial force, and the rear end cover block seals the main shaft, so that the electric spindle is completely installed and can be operated.

[0016] Optionally, a spring collet is further arranged, an installation groove is arranged on the end of the main shaft close to the front end cover block, the spring collet is arranged in the installation groove, and an annular nut for fixing the spring collet is threadedly connected to the main shaft.

[0017] By adopting the technical scheme, the spring collet is clamped to the tool through the cooperation of the annular nut.

[0018] Optionally, the installation groove is provided with a water outlet hole, the water outlet hole is communicated with the inside of the main shaft, and the part of the main shaft located in the machine body is a hollow structure.

[0019] By adopting the above technical scheme, the water outlet hole enables the cooling liquid to be sprayed from the inside of the main shaft at high pressure when the electric main shaft is running, so that the machining parts are cooled.

[0020] Optionally, the fitting gap between the first protrusion and the first rotating groove, the second protrusion and the second rotating groove, and the cover plate and the rotating groove is 0.1-0.2 mm on one side.

[0021] By adopting the above technical scheme, the control of the fitting gap enables the main shaft to rotate smoothly, and the small gap makes it difficult for the cooling liquid to flow into the inside of the electric main shaft.

[0022] In summary, the present application has at least one of the following beneficial technical effects:

[0023] 1. The fitting of the first protrusion and the first rotating groove and the fitting of the second protrusion and the second rotating groove, and the cover plate covering the rotating gap between the front end cover block and the sealing ring block prevent the splashed cooling liquid from directly entering the gap between the front end cover block and the sealing ring block, the sealing performance of the electric main shaft is improved, the cooling liquid is difficult to enter the inside of the electric main shaft, and the electric main shaft is difficult to be damaged;

[0024] 2. The fitting of the rotating block and the rotating groove improves the waterproof effect of the electric main shaft;

[0025] 3. The waterproof gasket prevents the cooling liquid from entering the inside of the electric main shaft. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structure schematic view of the electric main shaft with good sealing performance of the embodiment.

[0027] Figure 2 is Figure 1 a partial enlarged view of A of

[0028] MARKED DESCRIPTION: 1, machine body; 2, main shaft; 3, front end cover block; 4, sealing ring block; 51, first protrusion; 52, first rotating groove; 53, second protrusion; 54, second rotating groove; 55, through hole; 56, cover plate; 57, rotating block; 58, rotating groove; 61, fixed ring block; 62, inclined surface; 63, waterproof groove; 64, bearing seat; 65, rear end cover block; 66, installation groove; 67, ring nut; 68, water outlet hole; 7, waterproof gasket; 8, spring collet. DETAILED DESCRIPTION

[0029] The present application will be further described in detail below in combination with the drawings and embodiments.

[0030] The embodiment of the application discloses an electric spindle with good sealing performance. Figure 1 , Figure 2 The electric spindle with good sealing performance comprises a body 1 and a spindle 2 rotatably connected in the body 1.

[0031] The body 1 is fixed with a sealing ring block 4, and the sealing ring block 4 is in clearance fit with the front end cover block 3. Figure 1 , Figure 2 The side, close to the body 1, of the front end cover block 3 is fixed with a first protruding block 51 in a circumferential direction, and the sealing ring block 4 is provided with a first rotating groove 52 for accommodating the first protruding block 51, the first protruding block 51 is in clearance fit in the first rotating groove 52 and rotates in the first rotating groove.

[0032] The side, close to the front end cover block 3, of the sealing ring block 4 is fixed with a second protruding block 53 in a circumferential direction, and the front end cover block 3 is provided with a second rotating groove 54 for accommodating the second protruding block 53, the second protruding block 53 is in clearance fit in the second rotating groove 54 and rotates in the second rotating groove. Figure 1 , Figure 2 The outer periphery of the front end cover block 3 is provided with an inclined surface 62, and the inclined surface 62 is inclined towards the second rotating groove 54 along the outer periphery.

[0033] The sealing ring block 4 is fixed with a fixed ring block 61, and the fixed ring block 61 is provided with a plurality of through holes 55 for bolts in a circumferential direction, and the body 1 is provided with threaded holes for threadedly connecting the bolts, the bolts pass through the through holes 55 and are threadedly connected in the threaded holes, and the fixed ring block 61 is fixed on the body 1 through the bolts and the sealing ring block 4. Figure 1 , Figure 2 The outer diameter of the cover plate 56 is located on the sealing ring block 4.

[0034] The outer diameter of the cover plate 56 is located on the sealing ring block 4. Figure 1 , Figure 2, the electric spindle with good sealing also comprises a waterproof gasket 7, the front end cover block 3 is provided with a waterproof groove 63 on one side of the inner diameter of the sealing ring block 4 in the circumferential direction, and the waterproof gasket 7 is arranged in the waterproof groove 63. Two groups of bearing seats 64 are connected in the machine body 1, the two bearing seats 64 are a group, the two groups of bearing seats 64 are respectively connected at two ends of the machine body 1, the main shaft 2 is rotatably connected in the two groups of bearing seats 64 through bearings, and the rear end cover block 65 is rotatably connected on the machine body 1 and is fixed at one end of the main shaft 2 away from the front end cover block 3.

[0035] The implementation principle of the electric spindle with good sealing in the embodiment of the application is as follows: when the electric spindle works, the high-pressure sprayed cooling liquid passes through the water outlet hole 68 and cools the machined parts through the tool, the outer diameter of the cover plate 56 is located on the sealing ring block 4, the cover plate 56 plays a role in covering the rotating gap between the front end cover block 3 and the sealing ring block 4, preventing the splashed cooling liquid from directly entering the gap between the front end cover block 3 and the sealing ring block 4, and playing a first resealing role, the gap cooperation between the first protrusion 51 and the first rotating groove 52 and between the second protrusion 53 and the second rotating groove 54 further improves the waterproof sealing effect of the electric spindle, has a double sealing effect, the waterproof gasket 7 further improves the waterproof sealing effect of the electric spindle, the multi-layer sealing structure of the electric spindle improves the sealing performance of the electric spindle, the cooling liquid is not easy to enter the inside of the electric spindle, and the electric spindle is not easy to be damaged due to the inflow of the cooling liquid.

[0036] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so: any equivalent changes made on the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. A motorized spindle with good sealing, comprising a body (1) and a spindle (2) rotatingly arranged in the body (1), characterized in that: The main shaft (2) is provided with a front end cover block (3) on the circumference, the machine body (1) is provided with a sealing ring block (4), the sealing ring block (4) is in clearance fit with the front end cover block (3), the front end cover block (3) is provided with a first protruding block (51) on the side close to the machine body (1) in the circumference, the sealing ring block (4) is provided with a first rotating groove (52) for accommodating the first protruding block (51), the first protruding block (51) is in clearance fit in the first rotating groove (52) and rotates in the first rotating groove (52), the sealing ring block (4) is provided with a second protruding block (53) on the side close to the front end cover block (3) in the circumference, the front end cover block (3) is provided with a second rotating groove (54) for accommodating the second protruding block (53), the second protruding block (53) is in clearance fit in the second rotating groove (54) and rotates in the second rotating groove (54), the sealing ring block (4) is provided with a fixed ring block (61), the fixed ring block (61) is provided with a plurality of through holes (55) for bolts in the circumference, the fixed ring block (61) and the sealing ring block (4) are fixed on the machine body (1) by bolts, the front end cover block (3) is provided with a cover plate (56) in the circumference, and the outer diameter of the cover plate (56) is located on the sealing ring block (4).

2. The electric spindle with good tightness according to claim 1, characterized in that: The cover plate (56) is provided with a rotating block (57) on the outer diameter in the circumference, the rotating block (57) is located on the fixed ring block (61), the fixed ring block (61) is provided with a rotating groove (58) for accommodating the rotating block (57), and the cover plate (56) is in clearance fit with the rotating groove (58).

3. The electric spindle with good tightness according to claim 1, characterized in that: The front end cover block (3) is provided with an inclined surface (62) on the outer periphery, and the inclined surface (62) is inclined to the direction of the second rotating groove (54) along the outer periphery.

4. The electric spindle with good tightness according to claim 1, characterized in that: A waterproof gasket (7) is further included, a waterproof groove (63) is provided on the side of the front end cover block (3) close to the inner diameter of the sealing ring block (4) in the circumference, and the waterproof gasket (7) is arranged in the waterproof groove (63).

5. The electric spindle with good tightness according to claim 1, characterized in that: The machine body (1) is connected with a bearing seat (64), the machine body (1) is provided with a rear end cover block (65) in rotation, and the rear end cover block (65) is arranged at the end of the main shaft (2) away from the front end cover block (3).

6. The electric spindle with good tightness according to claim 1, characterized in that: A spring collet (8) is further included, the end of the main shaft (2) close to the front end cover block (3) is provided with a mounting groove (66), the spring collet (8) is arranged in the mounting groove (66), and the main shaft (2) is threadedly connected with an annular nut (67) for fixing the spring collet (8).

7. The electric spindle with good tightness according to claim 6, characterized in that: The mounting groove (66) is provided with a water outlet hole (68) at the groove bottom, the water outlet hole (68) communicates with the inside of the main shaft (2), and the part of the main shaft (2) located in the machine body (1) is in a hollow structure.

8. The electric spindle with good tightness according to claim 3, characterized in that: The clearance between the first protruding block (51) and the first rotating groove (52), the second protruding block (53) and the second rotating groove (54), and the cover plate (56) and the rotating groove (58) is 0.1-0.2mm on one side.

Images