Dustproof electric spindle shell

Abstract

The utility model discloses a dustproof electric main shaft casing relates to lathe processing technical field, including main shaft casing, its inside is equipped with the intercommunication air inlet channel and first gas channel, and the front end installs main shaft outer end cover, sealing ring and main shaft inner end cover in proper order. Main shaft outer end cover is equipped with the second gas channel with first gas channel in, and sealing ring surface has the gas guide ring groove and internal gas guide hole that communicate therewith, and the interval of sealing ring and main shaft inner end cover forms "S" type channel and gas outlet channel. When gas supply, gas is blown to the tool processing area and removes the dirt from the gas outlet channel through each channel. When stopping, the "S" type channel design makes the external dust even if enters the gas outlet channel, also will be blocked at the corner or gap, cannot enter the main shaft internal bearing part. Effectively solved the problem that dust is easy to enter the main shaft inside when lathe stops, can protect the main shaft, prolong its life, reduce maintenance cost and downtime, guarantee lathe stable operation and processing quality.

Description

Technical Field

[0001] This utility model relates to the field of machine tool processing technology, and in particular to a dustproof electric spindle housing. Background Technology

[0002] In the field of machine tool processing, the electric spindle, as a core component, directly affects machining accuracy and efficiency through its performance and stability. To ensure smooth machining, air is typically blown into the tool machining area to remove metal debris from the workpiece surface. Existing electric spindle housings generally have corresponding air supply channels. During machine tool operation, air is blown into the air intake channels inside the electric spindle housing through an external air pipe. The air passes through each channel sequentially and is then blown out of the air outlet towards the tool machining area, promptly removing metal debris and ensuring continuous, high-quality machining of the workpiece.

[0003] However, existing electric spindle housings have significant shortcomings in dustproof design. When the machine tool stops and the spindle stops supplying air, the air outlets used for blowing air lose their function of blocking gas. At this time, dust from the outside air can easily enter the spindle through these outlets. The spindle usually contains critical components such as precision bearings, which have extremely high requirements for the working environment. Even tiny dust particles can adhere to the bearing surface, increasing bearing wear and affecting their operating accuracy and lifespan. As dust accumulates, the spindle's performance gradually declines, leading to reduced machining accuracy, increased noise, and even potential spindle failure, increasing maintenance costs and downtime, and seriously affecting the machine tool's production efficiency and product quality. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model proposes a dustproof electric spindle housing.

[0005] This utility model proposes a dustproof electric spindle housing, including a spindle housing with an inlet channel and a first outlet channel connected inside the spindle housing. An outer end cover is installed at the front end of the spindle housing, and an inner end cover is installed at the end of the outer end cover. A sealing ring is fixed between the outer end cover and the inner end cover. A second outlet channel communicating with the first outlet channel is opened inside the outer end cover. An air guide ring groove communicating with the second outlet channel is opened on the surface of the sealing ring. Several air guide holes communicating with the air guide ring groove are opened around the inside of the sealing ring. An "S"-shaped channel communicating with the air guide holes and an outlet channel communicating with the "S"-shaped channel are reserved between the sealing ring and the inner end cover.

[0006] Furthermore, the outer end cover of the spindle is integrally connected with a first convex ring and has a first planar annular groove, and the rear end of the inner end cover of the spindle is integrally connected with a second convex ring and has a second planar annular groove.

[0007] Furthermore, the first convex ring is located inside the second planar annular groove, and the second convex ring is located inside the first planar annular groove, and the two have complementary shapes.

[0008] Furthermore, a first barbed protrusion is integrally connected to the front end of the sealing ring, and a barbed ring groove is opened on the rear edge of the inner end cover of the spindle. The first barbed protrusion is located inside the inner end cover of the spindle.

[0009] Furthermore, a sloping annular groove is provided on the rear end surface of the spindle inner end cover and inside the sealing ring, and the sloping annular groove communicates with the air guide hole.

[0010] Furthermore, the "S"-shaped channel includes a beveled annular groove, a gap between the sealing ring and the inner end cover of the main shaft, and a gap between the barb ring groove and the first barb protruding ring.

[0011] The beneficial effects of this utility model are as follows: Through the unique "S"-shaped channel design, when the machine tool stops and the spindle stops supplying air, it can effectively block dust in the outside air from entering the spindle through the air outlet channel, avoid dust from causing wear to precision components (such as bearings) inside the spindle, significantly extend the service life of the spindle, reduce machine tool maintenance costs and downtime, and ensure stable operation and processing quality of the machine tool. Attached Figure Description

[0012] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0013] Figure 2 This is a half-sectional perspective view of the outer end cover of the spindle, the sealing ring, and the inner end cover of the spindle in this utility model.

[0014] Figure 3 This utility model Figure 2 Assembly diagram;

[0015] Figure 4 This is a schematic diagram of the gas flow path in this utility model.

[0016] In the diagram: 1. Spindle housing; 11. Inlet channel; 12. First air delivery channel; 2. Outer end cover of the spindle; 21. Second air delivery channel; 22. First convex ring; 23. First planar annular groove; 3. Sealing ring; 31. Air guide hole; 32. First barbed convex ring; 4. Inner end cover of the spindle; 41. Barbed annular groove; 42. Inclined annular groove; 43. Second convex ring; 44. Second planar annular groove; 5. Outlet channel. Detailed Implementation

[0017] Reference Figure 1-3 The dustproof electric spindle housing proposed in this utility model mainly consists of a spindle housing 1, an outer spindle end cover 2, a sealing ring 3, and an inner spindle end cover 4. Specifically:

[0018] The spindle housing 1 has an air intake channel 11 and a first air delivery channel 12 inside, and the air intake channel 11 is connected to the first air delivery channel 12. An air pipe connector is installed at the inlet of the air intake channel 11. The air pipe connector is tightly connected to the inlet of the air intake channel 11 using a standard threaded connection to ensure the sealing of the connection and prevent gas leakage. The air pipe connector is used to connect an external air pipe. Once the external air pipe is connected, gas can be blown into the air intake channel 11.

[0019] The spindle outer end cover 2 is installed at the front end of the spindle housing 1 and is fixed by multiple high-strength bolts. The bolts are evenly distributed on the connection surface between the spindle outer end cover 2 and the spindle housing 1 to ensure the stability of the connection. The spindle outer end cover 2 has a second air supply channel 21 inside, which is connected to the first air supply channel 12 inside the spindle housing 1 so that gas can smoothly enter the second air supply channel 21 from the first air supply channel 12. The spindle outer end cover 2 has a first convex ring 22 and a first planar annular groove 23 integrally connected inside. The cross-sectional shape of the first convex ring 22 is circular, and its surface is finely machined to have high dimensional accuracy and surface roughness to ensure good fit with subsequent components.

[0020] The sealing ring 3 is fixed between the outer end cover 2 and the inner end cover 4 of the spindle. A gas guide groove is opened on the surface of the sealing ring 3. The gas guide groove is connected to the second gas supply channel 21 inside the outer end cover 2 of the spindle, so that the gas coming out of the second gas supply channel 21 can enter the gas guide groove. Several gas guide holes 31 are evenly opened around the inside of the sealing ring 3. The gas guide holes 31 are connected to the gas guide groove. The gas is further transported from the gas guide groove through the gas guide holes 31. The front end of the sealing ring 3 is integrally connected with a first barbed protrusion ring 32. The shape of the first barbed protrusion ring 32 is barbed. Its design can enhance the connection stability between the sealing ring 3 and the inner end cover 4 of the spindle and prevent the sealing ring 3 from loosening or shifting during operation.

[0021] The inner end cover 4 of the spindle is installed at the end of the outer end cover 2 of the spindle and is fixedly connected to the outer end cover 2 of the spindle by multiple bolts. The rear end of the inner end cover 4 of the spindle is integrally connected with a second convex ring 43 and a second planar annular groove 44. The second convex ring 43 is located inside the first planar annular groove 23 of the outer end cover 2 of the spindle, and the first convex ring 22 is located inside the second planar annular groove 44 of the inner end cover 4 of the spindle. The shapes of the first convex ring 22 and the second planar annular groove 44, and the second convex ring 43 and the first planar annular groove 23 are complementary. This design not only enhances the connection strength between the outer end cover 2 of the spindle and the inner end cover 4 of the spindle, but also plays a good sealing role to prevent gas leakage and dust ingress.

[0022] A barbed ring groove 41 is provided on the rear edge of the inner end cover 4 of the spindle. The first barbed protrusion 32 of the sealing ring 3 is located inside the inner end cover 4 of the spindle, and the first barbed protrusion 32 and the barbed ring groove 41 cooperate with each other to further enhance the sealing effect.

[0023] An inclined annular groove 42 is provided on the rear end surface of the spindle inner end cover 4 and inside the sealing ring 3. The inclined annular groove 42 communicates with the air guide hole 31 on the sealing ring 3. After the gas enters the inclined annular groove 42 from the air guide hole 31, it flows along the specific direction of the inclined annular groove 42.

[0024] An "S"-shaped channel communicating with the air guide hole 31 is reserved between the sealing ring 3 and the inner end cover 4 of the spindle. The "S"-shaped channel includes a beveled annular groove 42, a gap reserved between the sealing ring 3 and the inner end cover 4 of the spindle, and a gap reserved between the barb annular groove 41 and the first barb protruding ring 32. The inner end cover 4 of the spindle is also provided with an air outlet channel 5 communicating with the "S"-shaped channel. The outlet direction of the air outlet channel 5 is towards the tool processing area.

[0025] Work process

[0026] When it is necessary to blow air into the tool machining area to remove chips, connect the external air pipe to the air inlet channel 11 through the air pipe connector. After the external air pipe is filled with air, the airflow will pass through the air inlet channel 11, the first air delivery channel 12, and the second air delivery channel 21 in sequence, and enter the air guide ring groove inside the spindle outer end cover 2. Then, the gas enters the inclined ring groove 42 from the air guide ring groove through several air guide holes 31. Next, the gas flows along the inclined ring groove 42, enters the gap reserved between the sealing ring 3 and the spindle inner end cover 4, passes through the gap reserved between the barb ring groove 41 and the first barb protruding ring 32, and finally blows out through the air outlet channel 5. The airflow will blow towards the tool machining area, blowing away the metal chips on the workpiece surface, thereby facilitating the continuous machining of the workpiece. The entire gas flow path is shown in the attached figure. Figure 4 As shown;

[0027] When the machine is stopped, due to the unique design of the "S"-shaped channel, even if external dust enters the spindle through the exhaust channel 5, it will be blocked at the corners of the first barbed protruding ring 32, the barbed ring groove 41, or even in the inclined ring groove 42. These complex channel structures prevent dust from smoothly entering the bearing parts inside the spindle, thus effectively protecting the spindle and extending its service life.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A dust-proof electric spindle housing comprising a spindle housing (1), characterized in that, The spindle housing (1) has an inlet channel (11) and a first air delivery channel (12) connected inside. The spindle housing (1) has an outer end cover (2) installed at the front end and an inner end cover (4) installed at the end. The outer end cover (2) and the inner end cover (4) are fixed together with a sealing ring (3). The outer end cover (2) has a second air delivery channel (21) connected to the first air delivery channel (12) inside. The sealing ring (3) has a guide ring groove connected to the second air delivery channel (21) on its surface. The sealing ring (3) has several guide holes (31) connected to the guide ring groove around its circumference. An "S"-shaped channel connected to the guide hole (31) and an outlet channel (5) connected to the "S"-shaped channel are reserved between the sealing ring (3) and the inner end cover (4).

2. The dust-proof electric main shaft housing according to claim 1, characterized by The outer end cover (2) of the spindle is integrally connected with a first convex ring (22) and has a first planar annular groove (23). The rear end of the inner end cover (4) of the spindle is integrally connected with a second convex ring (43) and has a second planar annular groove (44).

3. The dust-proof electric main shaft housing according to claim 2, characterized by The first convex ring (22) is located inside the second planar annular groove (44), and the second convex ring (43) is located inside the first planar annular groove (23), and the two are complementary in shape.

4. The dust-proof electric main shaft housing according to claim 1, characterized by, The sealing ring (3) is integrally connected to the front end with a first barbed protrusion ring (32), and the rear end edge of the spindle inner end cover (4) is provided with a barbed ring groove (41). The first barbed protrusion ring (32) is located inside the spindle inner end cover (4).

5. The dustproof electric spindle housing according to claim 1, characterized in that, An inclined annular groove (42) is provided on the rear end surface of the spindle inner end cover (4) and inside the sealing ring (3), and the inclined annular groove (42) is connected to the air guide hole (31).

6. The dustproof electric spindle housing according to claim 1, characterized in that, The "S"-shaped channel includes the inclined annular groove (42), the gap between the sealing ring (3) and the inner end cover (4) of the main shaft, and the gap between the barb ring groove (41) and the first barb protrusion ring (32).

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