Center frame ejector head

Abstract

The utility model discloses a center frame top head, which relates to the technical field of machine tool equipment and is characterized in that a mounting groove is arranged on the end surface of one end of a mounting seat, a support roller and a tapered roller bearing which rotate in the same direction are sequentially and detachably mounted between two inner side walls of the mounting groove from inside to outside, and a shaft sleeve is sleeved on the outer ring surface of the tapered roller bearing; one side of the shaft sleeve abuts against and is matched with the supporting roller, the other side of the shaft sleeve extends out of the mounting groove, limiting pieces used for horizontally limiting the tapered roller bearing are arranged between the two end faces of the tapered roller bearing and the inner side wall of the adjacent mounting groove, and a connecting base connected with a machine tool is arranged on the end face of the other end of the mounting base. According to the utility model, the high stability of the center frame ejector head is realized, and great convenience is provided for subsequent overhaul and maintenance.

Description

Technical Field

[0001] This utility model relates to the field of machine tool equipment technology, and in particular to a center support mandrel. Background Technology

[0002] In the field of machine tool processing, the center rest is a key component used to support the workpiece and ensure machining accuracy. Traditional center rests usually use a fixed rest, but for heavy shaft machining, the fixed rest is very prone to wear and needs to be replaced frequently, resulting in wasted time. Therefore, existing center rests have begun to adopt a roller structure.

[0003] The center rest of the roller type structure uses a rotating tapered roller bearing to achieve an abutment fit with the machine tool center shaft. However, existing roller type center rests often use an interference fit to install the tapered roller bearing, which has the following drawbacks:

[0004] 1. Difficult disassembly: The interference fit of tapered roller bearings makes disassembly inconvenient during maintenance or replacement, increasing maintenance costs and time.

[0005] 2. Uneven stress: During the rotation of tapered roller bearings, the radial force depends entirely on the mounting shaft, which can easily lead to deformation of the mounting shaft or wear of the bearing inner ring, affecting service life.

[0006] 3. Insufficient stability and lack of effective horizontal limiting structure make the bearing prone to axial displacement or friction with the inner wall of the mounting groove, reducing rotational accuracy.

[0007] 4. Wear problem: The end face and inner ring surface of the bearing are often in direct contact with the center frame and mounting shaft. After long-term use, wear is likely to occur, requiring frequent replacement of the entire component, which is not economical.

[0008] Therefore, there is an urgent need for a center frame top that can overcome the above-mentioned shortcomings. Utility Model Content

[0009] In order to overcome the shortcomings of the prior art, this utility model discloses a center frame top head. This utility model not only achieves high stability of the center frame top head, but also provides great convenience for subsequent inspection and maintenance.

[0010] To achieve the above objectives, the present invention adopts the following technical solution:

[0011] A center support top includes a mounting base. One end face of the mounting base has a mounting groove. Between the two inner sidewalls of the mounting groove, a support roller and a tapered roller bearing rotating in the same direction are detachably mounted sequentially from the inside to the outside. A bushing is fitted on the outer ring surface of the tapered roller bearing. One side of the bushing abuts against the support roller, and the other side of the bushing protrudes outside the mounting groove. Limiting elements for horizontally limiting the tapered roller bearing are provided between both end faces of the tapered roller bearing and the adjacent inner sidewalls of the mounting groove. The other end face of the mounting base has a connecting seat for connecting to a machine tool.

[0012] Furthermore, the upper surface of the mounting base is provided with a mounting port A that passes through the mounting base and the mounting groove and is coaxially arranged with the tapered roller bearing. A mounting shaft A that is adapted to the mounting port A and is used for rotating the tapered roller bearing is detachably installed in the mounting port A.

[0013] Furthermore, at one end of the mounting port A, there are several limiting grooves evenly distributed along the inner wall of the port. The bottom surface of the limiting groove is provided with mounting screw holes. At one end of the mounting shaft A, there are several limiting plates that correspond to and fit with the limiting grooves. The limiting plates are provided with recessed screw holes that penetrate the limiting plates and correspond to the mounting screw holes. The corresponding recessed screw holes and mounting screw holes are provided with mounting screws A.

[0014] Furthermore, at the other end of the mounting port A, there are several limiting grooves evenly distributed along the inner wall of the port. At the other end of the mounting shaft A, there is a polygonal diameter reduction head. A limiting ring that matches the diameter reduction head is fitted on the diameter reduction head. Several limiting plates that correspond to the limiting grooves are evenly distributed on the outer wall of the limiting ring. The limiting plate has a recessed screw hole that penetrates the limiting plate and corresponds to the mounting screw hole. The corresponding recessed screw hole and mounting screw hole are equipped with mounting screws A.

[0015] Furthermore, the limiting component includes a sleeve and an annular plate. The outer diameter of the sleeve is adapted to the inner diameter of the tapered roller bearing, and the inner diameter of the sleeve is adapted to the diameter of the mounting port A. One end of the sleeve is provided with an annular plate coaxially arranged with the sleeve. The outer diameter of the annular plate is adapted to the outer diameter of the inner ring of the tapered roller bearing, and the inner diameter of the annular plate is adapted to the diameter of the mounting port A.

[0016] Furthermore, the upper surface of the mounting base is provided with a mounting port B that penetrates the mounting base and the mounting groove. A mounting shaft B that is compatible with the mounting port B and is used to rotate and install the support roller is detachably installed in the mounting port B.

[0017] Furthermore, the mounting base has fixing screw holes on the end face near the connecting base that are perpendicular to the mounting port B and pass through both ends of the mounting port B. Both ends of the mounting shaft B have threaded through holes that pass through the mounting shaft B and are respectively adapted to the two fixing screw holes. The corresponding fixing screw holes and threaded through holes are equipped with mounting screws B.

[0018] Furthermore, the end face of the connector away from the mounting base is provided with a connection port.

[0019] Compared with the prior art, the beneficial effects of this utility model are: by setting support rollers, when the tapered roller bearing is in contact with the machine tool center shaft on one side, it can limit the contact on the other side of the tapered roller bearing, thereby effectively reducing the radial force on the mounting shaft A and providing strong support for the horizontal stable rotation of the tapered roller bearing;

[0020] By setting a limiting plate, a reducing head, and a limiting ring at the end of the mounting shaft A, not only can the mounting shaft A be detachably installed, avoiding the problem of difficult disassembly of traditional tapered roller bearings with interference fit, but the vertical stability of the mounting shaft A can also be effectively guaranteed.

[0021] By setting a limiting component, not only can the tapered roller bearing be horizontally limited to ensure its stable rotation, but it can also effectively prevent wear between the tapered roller bearing and the inner wall of the mounting groove, thus facilitating subsequent maintenance and replacement.

[0022] This invention not only achieves high stability of the center rest mandrel, but also greatly facilitates subsequent inspection and maintenance, significantly extends the service life of the center rest mandrel, and significantly improves the accuracy and efficiency of machine tool processing, thus having significant practical value and economic benefits. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the mounting base structure of this utility model;

[0025] Figure 3 This is a schematic diagram of the limiting component structure of this utility model;

[0026] Figure 4 This is a schematic diagram of the mounting shaft A structure of this utility model;

[0027] Figure 5 This is a schematic diagram of the mounting shaft B structure of this utility model.

[0028] In the diagram: 1. Tapered roller bearing; 2. Bushing; 3. Mounting seat; 4. Limiting element; 5. Mounting shaft A; 6. Support roller; 7. Mounting shaft B; 8. Connecting seat; 9. Connecting port; 10. Mounting groove; 11. Mounting screw hole; 12. Limiting groove; 13. Mounting port A; 14. Fixing screw hole; 15. Mounting port B; 16. Annular plate; 17. Sleeve; 18. Mounting screw A; 19. Limiting plate; 20. Countersunk screw hole; 21. Reduction head; 22. Limiting ring; 23. Mounting screw B; 24. Threaded through hole. Detailed Implementation

[0029] The technical solution of this utility model will be described below with reference to the accompanying drawings of the embodiments of this utility model. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship, they are only corresponding to the drawings of this utility model for the convenience of describing this utility model, and do not indicate or imply that the device or element referred to must have a specific orientation.

[0030] Please refer to the instruction manual appendix. Figure 1-5 This utility model provides a technical solution:

[0031] Example 1: A center frame top includes a mounting base 3. One end face of the mounting base 3 is provided with a mounting groove 10. Between the two inner side walls of the mounting groove 10, a support roller 6 and a tapered roller bearing 1 that rotate in the same direction are detachably installed from the inside to the outside. Specifically, the upper surface of the mounting base 3 is provided with a mounting port A13 that passes through the mounting base 3 and the mounting groove 10 and is coaxially arranged with the tapered roller bearing 1. The inner diameter of the mounting port A13 is adapted to the inner diameter of the tapered roller bearing 1. A mounting shaft A5 adapted to the mounting port A13 is detachably installed in the mounting port A13. The mounting shaft A5 passes through the inner ring of the tapered roller bearing 1 to realize the rotational installation of the tapered roller bearing 1.

[0032] The upper surface of the mounting base 3 is provided with a mounting port B15 that passes through the mounting base 3 and the mounting groove 10 and is coaxially arranged with the support roller 6. A mounting shaft B7 that is adapted to the mounting port B15 can be detachably installed in the mounting port B15. The support roller 6 has an annular columnar structure. The mounting shaft B7 passes through the support roller 6 to realize the rotational installation of the support roller 6.

[0033] A bushing 2 is fitted on the outer ring surface of the tapered roller bearing 1. One side of the bushing 2 abuts against the support roller 6, and the other side of the bushing 2 protrudes outside the mounting groove 10. A connecting seat 8 is provided on the two end faces of the tapered roller bearing 1 and the other end face of the adjacent mounting seat 3. A connecting port 9 for connecting to the machine tool is provided on the end face of the connecting seat 8 away from the mounting seat 3.

[0034] In Example 2, to enable the detachable installation of the mounting shaft A5, several limiting grooves 12 are provided at one end of the mounting port A13, evenly distributed along the inner wall of the port. The end of the limiting groove 12 near the mounting port A13 is an open structure, and the bottom surface of the limiting groove 12 is provided with mounting screw holes 11. One end of the mounting shaft A5 is provided with several limiting plates 19 that correspond to and are adapted to the limiting grooves 12. The limiting plates 19 are provided with recessed screw holes 20 that penetrate the limiting plates 19 and correspond to the mounting screw holes 11. The corresponding recessed screw holes 20 and mounting screw holes 11 are provided with mounting screws A18. By engaging the limiting plates 19 and 12, the rotation of the mounting shaft A5 can be effectively prevented. Then, by connecting the mounting screws A18, the mounting shaft A5 can be fixedly installed.

[0035] To ensure the secure and stable installation of the mounting shaft A5, several limiting grooves 12 are evenly distributed along the inner wall of the mounting port A13 at the other end. The other end of the mounting shaft A5 is provided with a polygonal diameter reduction head 21. A limiting ring 22 that matches the diameter reduction head 21 is fitted on the diameter reduction head 21. Several limiting plates 19 that correspond to and match the limiting grooves 12 are evenly distributed on the outer wall of the limiting ring 22. The limiting plate 19 is provided with a recessed screw hole 20 that penetrates the limiting plate 19 and matches the mounting screw hole 11. The corresponding recessed screw hole 20 and mounting screw hole 11 are provided with mounting screws A18. The polygonal diameter reduction head 21 and limiting ring 22 at the other end of the mounting shaft A5 not only facilitate the subsequent disassembly and installation of the mounting shaft A5, but also further improve the security of the mounting shaft A5.

[0036] To enable the detachable installation of the mounting shaft B7, the end face of the mounting base 3 near the connecting base 8 is provided with fixing screw holes 14 that are perpendicular to the mounting port B15 and pass through both ends of the mounting port B15. Both ends of the mounting shaft B7 are provided with threaded through holes 24 that pass through the mounting shaft B7 and are respectively adapted to the two fixing screw holes 14. The corresponding fixing screw holes 14 and threaded through holes 24 are provided with mounting screws B23.

[0037] In Example 3, to achieve the rotating installation of the tapered roller bearing 1, the tapered roller bearing 1 not only needs to maintain horizontal stability, but its end face also needs to have a certain gap with the inner wall of the mounting groove 10. This means that during long-term rotation under stress, the tapered roller bearing 1 relies entirely on the mounting shaft A5 to maintain its horizontal stability, which can easily lead to deformation of the mounting shaft A5 or deformation of the inner ring surface of the tapered roller bearing 1. To ensure the horizontal stability of the tapered roller bearing 1, the inner wall of the mounting groove 10 is provided with a water-cooling device for the tapered roller bearing 1. The limiting component 4 of the flat limit is specifically a sleeve 17 and an annular plate 16. The outer diameter of the sleeve 17 is adapted to the inner diameter of the tapered roller bearing 1, and the inner diameter of the mounting port A13 is adapted to the inner diameter of the sleeve 17. One end of the sleeve 17 is provided with an annular plate 16 coaxially arranged with the sleeve 17. The outer diameter of the annular plate 16 is adapted to the outer diameter of the inner ring of the tapered roller bearing 1, and the inner diameter of the annular plate 16 is adapted to the diameter of the mounting port A13. The two limiting components 4 are mirror images of each other and are both inserted into the inner ring of the tapered roller bearing 1 through the sleeve 17.

[0038] During the rotation of the tapered roller bearing 1, the friction between the end face of the tapered roller bearing 1 and the inner wall of the mounting groove 10 is avoided by the partition of the annular plate 16, and the friction between the inner ring surface of the tapered roller bearing 1 and the mounting shaft A5 is avoided by the partition of the sleeve 17. By using the assembly of the limiting member 4 with the tapered roller bearing 1 and the mounting shaft A5, not only can the tapered roller bearing 1 maintain horizontal and stable rotation, but also wear of the tapered roller bearing 1 and the mounting groove 10 is avoided. Subsequently, only the limiting member 4 needs to be inspected and replaced.

[0039] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A center frame top, comprising a mounting base (3), characterized in that: The mounting base (3) has a mounting groove (10) on one end face. The two inner walls of the mounting groove (10) are detachably mounted from the inside to the outside, with a support roller (6) and a tapered roller bearing (1) rotating in the same direction. A bushing (2) is fitted on the outer ring surface of the tapered roller bearing (1). One side of the bushing (2) abuts against the support roller (6), and the other side of the bushing (2) protrudes to the outside of the mounting groove (10). Both ends of the tapered roller bearing (1) and the inner walls of the adjacent mounting groove (10) are provided with limiting parts (4) for horizontally limiting the tapered roller bearing (1). The other end face of the mounting base (3) is provided with a connecting seat (8) for connecting to the machine tool.

2. A center frame top head according to claim 1, characterized in that: The upper surface of the mounting base (3) is provided with a mounting port A (13) that passes through the mounting base (3) and the mounting groove (10) and is coaxially arranged with the tapered roller bearing (1). The mounting port A (13) is detachably installed with a mounting shaft A (5) that is compatible with the mounting port A (13) and is used to rotate the tapered roller bearing (1).

3. A center frame top head according to claim 2, characterized in that: At one end of the mounting port A (13), there are several limiting grooves (12) evenly distributed along the inner wall of the port. The bottom surface of the limiting groove (12) is provided with mounting screw holes (11). At one end of the mounting shaft A (5), there are several limiting plates (19) that correspond to and are adapted to the limiting grooves (12). The limiting plates (19) are provided with recessed screw holes (20) that penetrate the limiting plates (19) and are adapted to the mounting screw holes (11). The corresponding recessed screw holes (20) and mounting screw holes (11) are provided with mounting screws A (18).

4. A center frame top head according to claim 3, characterized in that: At the other end of the mounting port A (13), there are several limiting grooves (12) evenly distributed along the inner wall of the port. At the other end of the mounting shaft A (5), there is a polygonal diameter reduction head (21). A limiting ring (22) that matches the diameter reduction head (21) is fitted on the diameter reduction head (21). Several limiting plates (19) that correspond to the limiting grooves (12) are evenly distributed on the outer wall of the limiting ring (22). A recessed screw hole (20) that penetrates the limiting plate (19) and matches the mounting screw hole (11) is provided on the limiting plate (19). A mounting screw A (18) is provided in the corresponding recessed screw hole (20) and mounting screw hole (11).

5. A center frame top head according to claim 1, characterized in that: The limiting component (4) includes a sleeve (17) and an annular plate (16). The outer diameter of the sleeve (17) is adapted to the inner diameter of the tapered roller bearing (1). The inner diameter of the sleeve (17) is adapted to the diameter of the mounting port A (13). One end of the sleeve (17) is provided with an annular plate (16) coaxially arranged with the sleeve (17). The outer diameter of the annular plate (16) is adapted to the outer diameter of the inner ring of the tapered roller bearing (1). The inner diameter of the annular plate (16) is adapted to the diameter of the mounting port A (13).

6. A center frame top head according to claim 1, characterized in that: The upper surface of the mounting base (3) is provided with a mounting port B (15) that passes through the mounting base (3) and the mounting groove (10). A mounting shaft B (7) that is adapted to the mounting port B (15) and is used to rotate the mounting support roller (6) is detachably installed inside the mounting port B (15).

7. A center frame top head according to claim 6, characterized in that: The mounting base (3) has a fixing screw hole (14) on its end face near the connecting base (8) that is perpendicular to the mounting port B (15) and passes through both ends of the mounting port B (15). The mounting shaft B (7) has a threaded through hole (24) at both ends that passes through the mounting shaft B (7) and is adapted to the two fixing screw holes (14). The corresponding fixing screw hole (14) and threaded through hole (24) are provided with mounting screws B (23).

8. A center frame top head according to claim 1, characterized in that: The end face of the connector (8) away from the mounting base (3) is provided with a connector (9).

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