Chuck sealing mechanism of machine tool

Abstract

The utility model relates to the field of clamping equipment, and discloses a chuck sealing mechanism of a machine tool, which comprises a box body, a front chuck is rotatably connected inside the box body, an oil seal mounting seat is sleeved outside the front chuck, an oil seal baffle ring is fixedly connected inside the oil seal mounting seat, a sealing seat is sleeved outside the front chuck, and the oil seal baffle ring is fixedly connected inside the sealing seat. A first flow guide plate is fixedly connected to the interior of the sealing seat, a second flow guide plate is fixedly connected to the interior of the sealing seat, a front chuck bearing is fixedly connected to the exterior of the front chuck, and a return oil collecting assembly is arranged in the front chuck bearing. According to the utility model, the lubricating oil thrown out of the chuck bearing is blocked by the first guide plate and the second guide plate, returns to the interior of the front chuck bearing through the first oil discharge hole and the second oil discharge hole, and then returns to the collection box in the box body through the oil return pipeline, so that the leakage of the lubricating oil is effectively prevented, and the sealing performance of equipment is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to clamping equipment field especially, it relates to a chuck sealing mechanism of machine tool. BACKGROUND

[0002] At present, the sealing mechanism of machine tool chuck is mainly used to prevent the machine tool chuck from leaking oil and prevent the tool table cooling water from entering the front chuck when threading. In fact, the original labyrinth oil sealing structure imports a good precedent, but it is not suitable for this threading machine, and the main problem is still the defect in the design of the chuck, but changing the chuck is not realistic due to cost problems.

[0003] In the prior art, the oil seal in the traditional sealing mechanism is in a rotating state under normal working conditions. The close fit between the oil seal lip and the shaft surface makes it difficult for moisture to penetrate from the outside. The labyrinth structure principle used by the oil seal is that when the oil tries to leak from the inside to the outside, the oil will enter the labyrinth channel. Due to the tortuosity of the labyrinth channel, the oil changes direction continuously in the channel, generating vortex and resistance. In this process, the kinetic energy of the oil is gradually consumed, increasing the resistance of the oil leakage.

[0004] However, in the prior art, the sealing mechanism drives the iron rotating labyrinth to rotate when rotating, and the rotating speed is fast and the rotating force is large. The installation position of the rotating labyrinth on the chuck is small and can only install M5 screw force, which is seriously insufficient. The screw is easy to cut off and slip, and the rotating labyrinth not only cannot prevent oil but also has the safety hazard of flying out and hurting people. Therefore, a chuck sealing mechanism of machine tool is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides a chuck sealing mechanism of machine tool, which aims to improve the poor oil and water prevention effect in the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A chuck sealing mechanism of machine tool, comprising a box body, a front chuck is rotatably connected inside the box body, an oil seal mounting seat is sleeved outside the front chuck, an oil seal blocking ring is fixedly connected inside the oil seal mounting seat, a sealing seat is sleeved outside the front chuck, a first flow guide plate is fixedly connected inside the sealing seat, a second flow guide plate is fixedly connected inside the sealing seat, a front chuck bearing is fixedly connected outside the front chuck, and a collecting assembly for oil return is arranged inside the front chuck bearing.

[0008] As a further description of the above technical scheme:

[0009] The bottom of the oil seal mounting seat is fixedly connected to the top of the sealing seat, the inside of the first flow guide plate is provided with a plurality of first oil discharge holes, and the inside of the sealing seat is provided with a plurality of second oil discharge holes.

[0010] As a further description of the above technical solution:

[0011] The inside of the front chuck is slidably connected with a plurality of clamping jaws, and the oil seal blocking ring and the first flow guide plate are provided with an oil seal in the middle.

[0012] As a further description of the above technical solution:

[0013] The collecting assembly comprises a main shaft mounting cylinder, the top of the main shaft mounting cylinder is fixedly connected to the bottom of the sealing seat, and the inside of the main shaft mounting cylinder is fixedly connected with a bearing bottom plate.

[0014] As a further description of the above technical solution:

[0015] The inner wall of the main shaft mounting cylinder is in contact with the outside of the front chuck, and the outside of the main shaft mounting cylinder is in contact with the inner wall of the front chuck bearing.

[0016] As a further description of the above technical solution:

[0017] The inside of the main shaft mounting cylinder is provided with a third oil discharge hole, the inside of the bearing bottom plate is provided with a fourth oil discharge hole, and the outside of the fourth oil discharge hole and the third oil discharge hole is fixedly connected with an oil return pipeline.

[0018] As a further description of the above technical solution:

[0019] The inside of the box body is slidably connected with a collecting box, and the other end of the two oil return pipelines is in contact with the inside of the collecting box.

[0020] The utility model has the advantages of the following beneficial effects:

[0021] 1、the utility model discloses, through first flow guide plate and second flow guide plate block the lubricating oil of chuck bearing inside throwing out, and through first oil discharge hole and second oil discharge hole and timely return to the bottom of front chuck bearing, the lubricating oil of front chuck bearing bottom storage returns to the collecting box in the inside of box body through the oil return pipeline connected to third oil discharge hole and fourth oil discharge hole, effectively prevent the leakage of lubricating oil, improve the sealing performance of equipment. DRAWINGS

[0022] Figure 1 A perspective view of a chuck sealing mechanism of a machine tool is provided for the utility model;

[0023] Figure 2 A box body structure schematic view of a chuck sealing mechanism of a machine tool is provided for the utility model;

[0024] Figure 3 A chuck sealing mechanism of a machine tool is provided with the front chuck bearing structure schematic view of the utility model;

[0025] Figure 4 A chuck sealing mechanism of a machine tool is provided with the oil seal mounting seat structure schematic view of the utility model.

[0026] Legend:

[0027] 1, box body; 2, front chuck; 3, clamping jaw; 4, collection box; 5, oil seal mounting seat; 6, oil seal blocking ring; 7, sealing seat; 8, first flow guide plate; 9, second flow guide plate; 10, second oil discharge hole; 11, oil seal; 12, first oil discharge hole; 13, main shaft mounting cylinder; 14, third oil discharge hole; 15, bearing bottom plate; 16, fourth oil discharge hole; 17, oil return pipeline; 18, front chuck bearing. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0029] Reference Figure 1 and Figure 4The utility model provides a chuck sealing mechanism of machine tool, including box body 1, the metal structure of box body 1 is the cuboid shape, its material usually selects the cast iron or steel material with high strength and good rigidity to provide stable reliable installation foundation and protective housing for each part in the inside, the inside rotation of box body 1 is connected with front chuck 2, and front chuck 2 is discoid, and front chuck 2 is the key component for clamping work piece of machine tool, and the high-precision shaft hole is equipped in the center position, realizes accurate rotary motion through the connection with machine tool spindle to drive the work piece being clamped to carry out processing operation. The outside of front chuck 2 is equipped with oil seal mounting seat 5, and oil seal mounting seat 5 is annular structure, and with the outer surface of front chuck 2, a certain gap cooperation is kept, can guarantee that front chuck 2 rotates smoothly, and can provide accurate positioning and stable support for the oil seal 11 of subsequent installation. The inside fixed connection of oil seal mounting seat 5 has oil seal baffle 6, and oil seal baffle 6 is circular ring protrusion, and the outside of front chuck 2 is equipped with sealing seat 7, and sealing seat 7 is also annular structure, and is installed in specific position to realize the sealing of the surrounding area of front chuck 2. The inside fixed connection of sealing seat 7 has first flow guide plate 8, and first flow guide plate 8 is circular ring protrusion structure, and the main function of first flow guide plate 8 is to guide the leakage oil or the impurity entering, and the inside fixed connection of sealing seat 7 has second flow guide plate 9, and second flow guide plate 9 further enhances the flow guide effect, and makes water, oil enter subsequent structure and collect, and the outside fixed connection of front chuck 2 has front chuck bearing 18, and front chuck bearing 18 is high-precision rolling bearing, and is equipped with rolling body such as ball or roller in its inside, and is installed between bearing inner ring and outer ring. The main role of front chuck bearing 18 is to support the rotary motion of front chuck 2, reduces the friction resistance between front chuck 2 and box body 1, and ensures that front chuck 2 can rotate smoothly and efficiently. The inside of front chuck bearing 18 is provided with the collection assembly of oil return.

[0030] Referring to Figures 3-4The bottom of the oil seal mounting seat 5 is fixedly connected to the top of the sealing seat 7, and is connected by welding, can bear a certain shearing force and tension, and ensures that the two do not have relative displacement during the operation of the machine tool. The inside of the first flow guide plate 8 is provided with a plurality of first oil discharge holes 12. The shape of the oil discharge holes is generally circular, and the diameter is accurately calculated. A smaller diameter can limit the flow of oil to some extent, avoid the oil from spilling due to too fast discharge, and cause the sealing to fail. The inside of the sealing seat 7 is provided with a plurality of second oil discharge holes 10. The second oil discharge holes 10 receive oil flowing out of the first oil discharge holes 12 of the first flow guide plate 8 on one hand, and discharge the oil into the inside of the subsequent collection assembly on the other hand. The inside of the front chuck 2 is slidably connected with a plurality of clamping jaws 3. The inside of the front chuck 2 is processed with a sliding groove or a clamping groove matched with the clamping jaws 3. The clamping jaws 3 are long strip-shaped metal parts, and one end of the clamping jaws 3 is generally processed with a clamping surface in contact with the workpiece. The clamping surface can have a toothed pattern or a special anti-slip treatment to enhance the clamping force and stability of the workpiece. The oil seal 11 is arranged between the oil seal retaining ring 6 and the first flow guide plate 8. The oil seal 11 is an annular sealing member made of rubber.

[0031] Referring to Figures 2-3 The inner wall of the main shaft mounting cylinder 13 is in contact with the outside of the front chuck 2. The main shaft mounting cylinder 13 is in a cylindrical shape to avoid oil and water leakage. The outside of the main shaft mounting cylinder 13 is in contact with the inner wall of the front chuck bearing 18. The outside dimension of the main shaft mounting cylinder 13 is accurately matched with the inner wall of the front chuck bearing 18 to provide an accurate installation positioning reference for the front chuck bearing 18. The inside of the main shaft mounting cylinder 13 is provided with a third oil discharge hole 14. The inside of the bearing bottom plate 15 is provided with a fourth oil discharge hole 16. The third oil discharge hole 14 and the fourth oil discharge hole 16 are circular through holes to discharge oil and avoid excessive accumulation of lubricating oil inside the main shaft mounting cylinder 13. The outside of the fourth oil discharge hole 16 and the third oil discharge hole 14 is fixedly connected with an oil return pipeline 17. The oil return pipeline 17 is an elongated pipeline made of rubber, and the inner wall is smooth to reduce the resistance of oil flow. The inside of the box body 1 is slidably connected with a collection box 4. The other end of the two oil return pipelines 17 is in contact with the inside of the collection box 4. The collection box 4 is generally a rectangular metal container to facilitate the reception of lubricating oil delivered by the oil return pipeline 17. The bottom and side of the collection box 4 is provided with a sliding block or a guide rail matched with the corresponding sliding groove or guide rail inside the box body 1, so that the collection box 4 can be conveniently pulled out or pushed in inside the box body 1 for collection and cleaning.

[0032] Working principle: the staff starts the motor to drive the front chuck 2 and the inner ring of the front chuck bearing 18 to rotate at high speed, the lubricating oil thrown out of the front chuck bearing 18 is first sprayed on the first guide plate 8 and the second guide plate 9 and is blocked by most of them, and is returned to the bottom of the front chuck bearing 18 in time through the first oil discharging hole 12 and the second oil discharging hole 10, the lubricating oil accumulated at the bottom of the front chuck bearing 18 is returned to the collecting box 4 in the box body 1 through the third oil discharging hole 14 and the fourth oil discharging hole 16. In this way, the bottom of the front chuck bearing 18 will not accumulate lubricating oil all the time, since the positions of the oil discharging holes are all lower than the lip of the oil seal 11, therefore, generally only a small amount of oil without throwing force remains at the lip of the oil seal 11, which is relatively easy to seal through the lip of the oil seal 11, even if the lip of the oil seal 11 is worn out by long-time operation, it does not matter, and not much lubricating oil will leak outside, because a large amount of lubricating oil has been discharged in advance from the oil discharging holes. As long as the oil discharging holes are dredged by compressed air through regular maintenance, it can avoid the accumulation of oil at the bottom of the front chuck bearing 18, and ensure that the lubricating oil at the bottom is always lower than the lip of the oil seal 11. Two O-ring static seals are installed at the connection between the oil seal mounting seat 5 and the sealing seat 7 to prevent lubricating oil from leaking through the connection, and to improve the sealing performance of the equipment.

[0033] Finally, it should be pointed out that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, it still can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A chuck sealing mechanism of a machine tool comprising a box (1), characterized in that: The inside of the box (1) is rotatably connected with a front chuck (2), the outside of the front chuck (2) is sleeved with an oil seal mounting seat (5), the inside of the oil seal mounting seat (5) is fixedly connected with an oil seal retaining ring (6), the outside of the front chuck (2) is sleeved with a sealing seat (7), the inside of the sealing seat (7) is fixedly connected with a first flow guide plate (8), the inside of the sealing seat (7) is fixedly connected with a second flow guide plate (9), the outside of the front chuck (2) is fixedly connected with a front chuck bearing (18), and the inside of the front chuck bearing (18) is provided with an oil collecting assembly.

2. A chuck seal mechanism for a machine tool according to claim 1, wherein: The bottom of the oil seal mounting seat (5) is fixedly connected to the top of the sealing seat (7), a plurality of first oil discharge holes (12) are formed in the inside of the first flow guide plate (8), and a plurality of second oil discharge holes (10) are formed in the inside of the sealing seat (7).

3. A chuck seal mechanism for a machine tool according to claim 1, wherein: The inside of the front chuck (2) is slidably connected with a plurality of clamping jaws (3), and an oil seal (11) is arranged between the oil seal retaining ring (6) and the first flow guide plate (8).

4. A chuck seal mechanism for a machine tool according to claim 1, wherein: The collecting assembly comprises a main shaft mounting cylinder (13), and the top of the main shaft mounting cylinder (13) is fixedly connected to the bottom of the sealing seat (7).

5. A chuck seal mechanism for a machine tool according to claim 4, wherein: The inner wall of the main shaft mounting cylinder (13) is in contact with the outside of the front chuck (2), and the outside of the main shaft mounting cylinder (13) is in contact with the inner wall of the front chuck bearing (18).

6. A chuck seal mechanism for a machine tool according to claim 4, wherein: The inside of the main shaft mounting cylinder (13) is provided with a third oil discharge hole (14), the inside of the bearing bottom plate (15) is provided with a fourth oil discharge hole (16), and the outside of the fourth oil discharge hole (16) and the third oil discharge hole (14) is fixedly connected with an oil return pipeline (17).

7. A chuck seal mechanism for a machine tool according to claim 6, wherein: The inside of the box (1) is slidably connected with a collecting box (4), and the other end of the two oil return pipelines (17) is in contact with the inside of the collecting box (4).

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