A rear cover waterproof structure of a drill spindle

Abstract

The utility model discloses a rear cover waterproof structure of drilling and tapping main shaft relates to drilling and tapping main shaft accessory technical field, be used for the rear end of sealing shell of being sleeved on the main shaft, the shell is hollow structure and is sleeved on the main shaft, its characterized in that, including rear end cover, end cap and middle nut, the end cap and the middle nut all are sleeved on the main shaft, the end cap is connected on the middle nut, the rear end cover is sleeved on the end cap and the middle nut and is fixedly connected on the shell, one end of end cap is equipped with first annular boss, the annular boss is equipped with annular clamping groove, one end of rear end cover is equipped with the annular clamping strip of protruding, when the end cap is installed in the rear end cover end, the annular clamping strip is tightly inserted into the annular clamping groove, the utility model adopts the labyrinth seal design, reaches better sealing effect, effectively prevents the impurity such as cutting fluid and cutting chip and so on to enter the inside of main shaft.

Description

Technical Field

[0001] This utility model relates to the technical field of drilling and tapping spindle accessories, specifically a waterproof structure for the back cover of a drilling and tapping spindle. Background Technology

[0002] The spindle is a component used for machining in CNC machine tools. One end is connected to a motor, and the other end is connected to a cutting tool. Machining is achieved by driving the spindle through the motor.

[0003] During the machining process, a large amount of cutting fluid and chips will splash out. However, the existing drilling and tapping machine spindles are not well sealed, and impurities such as cutting fluid and chips can easily enter the spindle, affecting machining accuracy and spindle life. Utility Model Content

[0004] This utility model discloses a waterproof rear cover structure for a drilling and tapping spindle to solve the technical problem that impurities can easily enter the spindle.

[0005] To solve the above-mentioned technical problems, the present invention proposes the following optimized technical solution: A waterproof rear cover structure for a drilling and tapping spindle is used to fit onto the spindle and seal the rear end of the housing. The housing is a hollow structure and fits onto the spindle. The waterproof rear cover structure includes a rear end cover, end nuts, and a middle nut. The end nuts and the middle nut are both fitted onto the spindle. The end nuts are connected to the middle nut. The rear end cover is fitted onto the end nuts and the middle nut and is fixedly connected to the housing. One end of the end nut is provided with a first annular boss, the annular boss is provided with an annular groove, and one end of the rear end cover is provided with a raised annular strip. When the end nut is installed on the end of the rear end cover, the annular strip is tightly inserted into the annular groove.

[0006] Furthermore, the outer wall of the central nut is provided with three continuous first ring grooves forming a circle.

[0007] Furthermore, the outer wall of the central nut is provided with three continuous second ring grooves forming a circle.

[0008] Furthermore, the depth of the second groove is greater than the depth of the first groove.

[0009] Furthermore, the rear end cover is provided with a second annular protrusion, and the second annular protrusion is provided with a protruding strip. When the rear end cover is connected to the outer shell, the protruding strip is inserted into the hollow structure of the outer shell.

[0010] Furthermore, the present invention also includes a plurality of first bolts, wherein the end nut is connected to the middle nut by the first bolts.

[0011] Furthermore, the present invention also includes a second bolt, wherein the second annular boss is connected to the outer casing by the second bolt.

[0012] Furthermore, the outer wall of the spindle is provided with a first protrusion in a circle, and when the end nut is fitted onto the spindle, the inner wall of the end nut is locked with the first protrusion.

[0013] Furthermore, the outer wall of the spindle is provided with a second protrusion in a circle, the central nut is fitted on the spindle, and the inner wall of the central nut is engaged with the second protrusion.

[0014] The present invention has the following advantages over the prior art: The waterproof structure of the rear cover of the drilling and tapping spindle provided by this utility model is provided with a rear end cover, an end nut, and a middle nut. The end nut is provided with an annular boss, which has a sealing effect on the opening of the rear end cover. The annular boss is provided with an annular groove, and the rear end cover is provided with an annular retaining strip. The annular retaining strip is tightly inserted into the annular groove to form a labyrinth seal design, achieving a good sealing effect and effectively preventing impurities such as cutting fluid and cutting chips from entering the spindle. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the structure of the rear end cover of this utility model.

[0017] Figure 3 This is a schematic diagram of the structure of the middle nut of this utility model.

[0018] Figure 4 This is a schematic diagram of the end nut structure of this utility model.

[0019] In the diagram: 1. Main shaft; 2. Housing; 3. Rear end cover; 4. End nut; 5. Middle nut; 6. First annular boss; 7. Annular groove; 8. Annular retaining strip; 9. First groove; 10. Second groove; 11. Second annular boss; 12. Raised strip; 13. First bolt; 14. First protrusion; 15. Second protrusion. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] See Figures 1-4 A waterproof rear cover structure for a drilling and tapping spindle is used to fit onto the spindle 1 and seal the rear end of the housing 2. The housing 2 is a hollow structure and fits onto the spindle 1 to prevent impurities from entering the housing 2. The waterproof rear cover structure includes a rear end cover 3, an end nut 4, and a middle nut 5. The end nut 4 and the middle nut are both fitted onto the spindle 1. The end nut 4 is connected to the middle nut. The rear end cover 3 is fitted onto the end nut 4 and the middle nut 5 and is fixedly connected to the housing 2. One end of the end nut 4 is provided with a first annular boss 6. The height of the first annular boss 6 is sufficient to seal the opening of the outer casing 2. The annular boss is provided with an annular groove 7. One end of the rear end cover 3 is provided with a raised annular retaining strip 8. When the end nut 4 is installed at the end of the rear end cover 3, the annular retaining strip 8 is tightly inserted into the annular groove 7. The end nut 4 serves to seal the opening of the rear end cover 3. The cooperation between the annular retaining strip 8 and the annular groove 7 forms a labyrinth seal structure design. This labyrinth seal structure design serves to seal the opening of the rear end cover 3, thereby preventing impurities such as cutting fluid and cutting chips from entering the spindle 1.

[0022] In this embodiment, the outer wall of the middle nut 5 is provided with three continuous first ring grooves 9. The first ring grooves 9 make it easy for the rear end cover 3 to be fitted onto the middle nut 5, and the groove formed by the first ring grooves 9 and the inner wall of the rear end cover 3 can also accommodate cutting chips and other impurities, further preventing impurities from entering the spindle 1.

[0023] In this embodiment, the outer wall of the middle nut 5 is provided with three continuous second ring grooves 10. The second ring grooves 10 facilitate the rear end cover 3 to be fitted onto the middle nut 5, and the grooves formed by the second ring grooves 10 and the inner wall of the rear end cover 3 can also accommodate cutting chips and other impurities, further preventing impurities from entering the spindle 1.

[0024] In this embodiment, the depth of the second groove 10 is greater than the depth of the first groove 9, so the second groove 10 can accommodate more impurities and has a better effect in preventing impurities from entering the spindle 1.

[0025] In this embodiment, the rear end cover 3 is provided with a second annular protrusion 11. The height of the second annular protrusion 11 is sufficient to seal the opening of the outer shell 2, thereby achieving a sealing effect. The second annular protrusion 11 is provided with a protrusion 12. When the rear end cover 3 is connected to the outer shell 2, the protrusion 12 is inserted into the hollow structure of the outer shell 2. The protrusion 12 further prevents impurities from entering the interior of the main shaft 1 from the opening of the outer shell 2, thereby achieving a better dustproof effect.

[0026] In this embodiment, the present invention also includes a plurality of first bolts 13, and the end nut is connected to the middle nut 5 by the first bolts 13 to achieve the connection function.

[0027] In this embodiment, the present invention also includes a second bolt, and the second annular boss 11 is connected to the outer shell 2 by the second bolt to achieve the connection function.

[0028] In this embodiment, the outer wall of the spindle 1 is provided with a first protrusion 14 in a circle. When the end nut 4 is fitted onto the spindle 1, the inner wall of the end nut 4 is locked with the first protrusion 14, so that the end nut 4 can be fitted onto the spindle 1 more securely.

[0029] In this embodiment, the outer wall of the spindle 1 is provided with a second protrusion 15 in a circle, the middle nut 5 is fitted on the spindle 1, and the inner wall of the middle nut 5 is clamped to the second protrusion 15, so that the middle nut 5 can be fitted on the spindle 1 more securely.

[0030] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A waterproof rear cover structure for a drilling and tapping spindle, used to fit over the spindle and seal the rear end of a housing, wherein the housing is a hollow structure and fits over the spindle, characterized in that, It includes a rear end cap, end nuts, and a middle nut. The end nuts and the middle nut are both fitted onto the main shaft. The end nuts are connected to the middle nut. The rear end cap is fitted onto the end nuts and the middle nut and is fixedly connected to the outer casing. One end of the end nut is provided with a first annular boss, the annular boss is provided with an annular groove, and one end of the rear end cover is provided with a raised annular strip. When the end nut is installed on the end of the rear end cover, the annular strip is tightly inserted into the annular groove.

2. The waterproof structure for the rear cover of a drilling and tapping spindle according to claim 1, characterized in that, The outer wall of the central nut has three continuous first ring grooves forming a circle.

3. The waterproof structure for the rear cover of a drilling and tapping spindle according to claim 2, characterized in that, The outer wall of the central nut has three continuous second ring grooves forming a circle.

4. The waterproof structure of the rear cover of a drilling and tapping spindle according to claim 3, characterized in that, The depth of the second groove is greater than the depth of the first groove.

5. The waterproof structure for the rear cover of a drilling and tapping spindle according to claim 1, characterized in that, The rear end cover is provided with a second annular protrusion, and the second annular protrusion is provided with a protruding strip. When the rear end cover is connected to the outer shell, the protruding strip is inserted into the hollow structure of the outer shell.

6. The waterproof structure for the rear cover of a drilling and tapping spindle according to claim 1, characterized in that, It also includes several first bolts, and the end nuts are connected to the middle nut by the first bolts.

7. The waterproof structure for the rear cover of a drilling and tapping spindle according to claim 5, characterized in that, It also includes a second bolt, through which the second annular boss is connected to the housing.

8. The waterproof structure for the rear cover of a drilling and tapping spindle according to claim 1, characterized in that, The outer wall of the spindle is provided with a first protrusion in a circle. When the end nut is put on the spindle, the inner wall of the end nut is locked with the first protrusion.

9. The waterproof structure for the rear cover of a drilling and tapping spindle according to claim 1, characterized in that, The outer wall of the spindle is provided with a second protrusion in a circle, and the middle nut is fitted on the spindle, with the inner wall of the middle nut clamping the second protrusion.

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