A four-jaw chuck for clamping large castings

Abstract

This utility model discloses a four-jaw chuck for clamping large castings. Belonging to the field of chuck accessories, it includes a chuck body with four jaws that can move and adjust radially. A fixing ring is provided on one end face of the chuck body, and the fixing ring and jaws are located on the same side of the chuck body. A rotating ring is rotatably connected to the fixing ring. An annular platform is provided on the outer end face of the rotating ring. Several radially threaded holes are provided on the circumferential sidewall of the annular platform, and fastening bolts are screwed into these holes. These fastening bolts can clamp the small circular stepped column of the large casting. This structure assists in adjusting the position of the large casting, enabling the four jaws of the four-jaw chuck to quickly and accurately engage.

Description

Technical Field

[0001] This utility model relates to the field of chuck accessories, specifically to a four-jaw chuck for clamping large castings. Background Technology

[0002] Clamping large castings requires the use of chucks during machining. For round castings, a three-jaw chuck can clamp and position the workpiece. However, when encountering large castings with irregular shapes, a four-jaw chuck is often needed, as each jaw can be adjusted individually.

[0003] However, we now face a large casting with a small stepped cylindrical column at one end and a large, irregular shape at the other. Because the stepped column is too short to be clamped by chucks, the four jaws of a four-jaw chuck must be used to secure the irregular shape's outer surface. In actual machining, due to the large size of the casting, adjusting the position of the chucks for precise clamping is extremely time-consuming.

[0004] In view of the problems existing in the prior art, this utility model designs and manufactures a four-jaw chuck for clamping large castings to overcome the above defects. Summary of the Invention

[0005] To address the problems existing in the prior art, this utility model provides a four-jaw chuck for clamping large castings, which can assist in adjusting the position of large castings, thereby enabling the four jaws of the four-jaw chuck to quickly and accurately engage.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a four-jaw chuck for clamping large castings, comprising a chuck body, wherein the chuck body is provided with four jaws, and the four jaws can be moved and adjusted in the radial direction of the chuck body;

[0007] A fixing ring is provided on one end face of the chuck body, and the fixing ring and the chuck claw are located on the same side of the chuck body;

[0008] A rotating ring is rotatably connected to the fixed ring. An annular platform is provided on the outer end face of the rotating ring. Several radial threaded holes are provided on the circumferential side wall of the annular platform. Fastening bolts are screwed into the radial threaded holes. Several fastening bolts can clamp the small circular stepped column of the large casting.

[0009] Preferably, the rotating ring has a plurality of rotating shafts arranged on the circumference of the side near the fixed ring, and bearings are rotatably connected to the rotating shafts;

[0010] The fixed ring has a groove on the side near the rotating ring, and several bearings can be fitted in the groove. The rotating ring rotates on the fixed ring through the bearings and the groove.

[0011] Preferably, the annular groove is configured as a stepped groove, the stepped groove including a narrow groove near the opening of the annular groove and a wide groove located inside the annular groove;

[0012] The width of the wide slot is equal to the diameter of the bearing, and the width of the narrow slot is less than the diameter of the bearing but greater than the diameter of the shaft.

[0013] The narrow groove sidewall is provided with an embedding groove corresponding to the number and position of the bearings. The embedding groove is connected to the wide groove, and the bearings can enter the wide groove through the embedding groove.

[0014] Preferably, the rotating shaft is provided as a shoulder screw, and the bearing is mounted on the shoulder screw;

[0015] The shoulder screw between the bearing and the rotating ring is provided with a collar, the diameter of which is smaller than the width of the narrow groove.

[0016] Preferably, a wear-resistant lubricating pad is also fitted on the collar, and the outer diameter of the wear-resistant lubricating pad is larger than the width of the wide groove.

[0017] Preferably, the claws are staggered with the radial threaded holes on the annular platform.

[0018] Preferably, after the jaws clamp and position the large casting, the fastening bolts are moved away from the large casting.

[0019] Preferably, the retaining ring is detachably connected to one end face of the chuck body.

[0020] The advantages of this utility model are:

[0021] 1. This utility model first uses several fastening bolts on the ring platform to initially clamp and position the small circular stepped column of the large casting. The large casting is then adjusted by rotating the rotating structure between the rotating ring and the fixed ring, which makes it more convenient and efficient. Finally, the chuck quickly corresponds to the clamping position. Compared with the traditional manual handling and adjustment, it not only reduces the labor intensity but also improves the clamping efficiency.

[0022] 2. This utility model utilizes several bearings arranged circumferentially to cooperate with the annular groove on the fixed ring, thereby realizing the relative rotation of the fixed ring and the rotating ring. Moreover, the use of the stepped groove structure to cooperate with the bearing restricts the axial movement of the rotating ring, ensuring the stability of the relative rotation between the rotating ring and the fixed ring. In addition, the bearing utilizes the embedding groove on the stepped groove to ensure that the bearing can enter the wide groove.

[0023] 3. This utility model utilizes a wear-resistant lubricating pad placed between the fixed ring and the rotating ring to ensure the stability of the two when they rotate relative to each other. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a four-jaw chuck used for clamping large castings;

[0025] Figure 2 This is a partial schematic diagram of the fit between the bearing and the stepped groove of this utility model;

[0026] Figure 3 This is a partial schematic diagram of the stepped groove of this utility model;

[0027] Figure 4 This is a front view of the rotating ring of this utility model;

[0028] Figure 5 This is a rear view of the rotating ring of this utility model;

[0029] Figure 6 This is a front view of the bearing of this utility model when it is fitted with the stepped groove.

[0030] In the diagram: 1. Chuck body; 2. Chuck jaws; 3. Fixed ring; 4. Rotating ring; 5. Ring platform; 6. Casting; 7. Fastening bolt; 8. Bearing; 9. Shoulder screw; 10. Collar; 11. Wear-resistant lubricating pad; 12. Radial threaded hole; 13. Wide slot; 14. Narrow slot; 15. Stepped slot; 16. Embedded slot. Detailed Implementation

[0031] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0032] like Figures 1 to 6 As shown, a four-jaw chuck for clamping large castings includes a chuck body 1, on which four jaws 2 are provided, and the four jaws 2 can be moved and adjusted in the radial direction of the chuck body 1.

[0033] Because the casting 6 to be processed is large in size and has a unique shape, the actual clamping and adjustment is time-consuming and labor-intensive. Specifically, one end of the casting 6 is a small circular stepped column, and the other end is a large irregular shape. Since the length of the small circular stepped column is too short to be clamped by the jaws 2, the four jaws 2 of the four-jaw chuck can only be used to fix the outer surface of the irregular shape. However, in the actual clamping process, the position of the casting 6 needs to be adjusted. The casting 6 is too large, so workers need to move and adjust it, which is time-consuming and labor-intensive. In order to solve the above problems, this utility model solves the problem through the following structure:

[0034] A fixing ring 3 is provided on one side end face of the chuck body 1. The fixing ring 3 and the chuck jaw 2 are located on the same side of the chuck body 1. The fixing ring 3 is detachably connected to one side end face of the chuck body 1 and can be removed when the large casting 6 does not need to be adjusted.

[0035] A rotating ring 4 is rotatably connected to the fixed ring 3. An annular platform 5 is provided on the outer end face of the rotating ring 4. Several radial threaded holes 12 are provided on the circumferential side wall of the annular platform 5. Fastening bolts 7 are screwed into the radial threaded holes 12. Several fastening bolts 7 can clamp the small circular stepped column of the large casting 6.

[0036] The chuck 2 and the radial threaded hole 12 on the annular platform 5 are staggered to prevent the chuck 2 from affecting the rotation of the tool and fastening bolt 7.

[0037] This utility model uses several fastening bolts 7 on the annular platform 5 to initially clamp and position the small circular stepped column of the large casting 6. The large casting 6 can then be adjusted more conveniently and efficiently by using the rotation structure between the rotating ring 4 and the fixed ring 3. Ultimately, the chuck 2 can quickly correspond to the clamping position. Compared with the traditional manual handling and adjustment, this not only reduces labor intensity but also improves clamping efficiency.

[0038] Specifically, the rotating ring 4 has several rotating shafts arranged around its circumference near the fixed ring 3, and bearings 8 are rotatably connected to the rotating shafts.

[0039] The fixed ring 3 has an annular groove on the side near the rotating ring 4, and several bearings 8 can fit into the annular groove. The rotating ring 4 rotates on the fixed ring 3 through the bearings 8 and the annular groove. The annular groove is specifically designed as a stepped groove 15, which includes a narrow groove 14 near the opening of the annular groove and a wide groove 13 located in the annular groove. The width of the wide groove 13 is equal to the diameter of the bearing 8, and the width of the narrow groove 14 is less than the diameter of the bearing 8 but greater than the diameter of the rotating shaft. The bearing 8 is located in the wide groove 13. The narrow groove 14 can restrict the axial movement of the rotating ring 4, ensuring the stability of the relative rotation between the rotating ring 4 and the fixed ring 3.

[0040] The narrow groove 14 has an embedding groove 16 on its side wall that corresponds to the number and position of the bearings 8. The embedding groove 16 is connected to the wide groove 13, and the bearings 8 can enter the wide groove 13 through the embedding groove 16.

[0041] The rotating shaft of this utility model is preferably provided as a shoulder screw 9, and the bearing 8 is provided on the shoulder screw 9. A collar 10 is provided on the shoulder screw 9 between the bearing 8 and the rotating ring 4. The diameter of the collar 10 is smaller than the width of the narrow groove 14. The collar 10 can prevent the bearing 8 from moving axially. A wear-resistant lubricating pad 11 is also provided on the collar 10. The outer diameter of the wear-resistant lubricating pad 11 is larger than the width of the wide groove 13. The wear-resistant lubricating pad 11 is placed between the fixed ring 3 and the rotating ring 4 to further ensure the stability of the two when they rotate relative to each other.

[0042] After the jaws 2 clamp and position the large casting 6, the fastening bolts 7 are moved away from the large casting 6. That is, only the jaws 2 are used to clamp and position the large casting 6. The function of the fastening bolts 7 is only for initial positioning and to facilitate the rotation and adjustment of the position of the large casting 6. The final clamping can be achieved by only the jaws 2, thus avoiding over-positioning.

[0043] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Furthermore, it should be understood that after reading the technical description of this utility model, those skilled in the art can make various alterations, modifications, and / or variations to this utility model, and all such equivalent forms also fall within the scope of protection defined by the appended claims.

Claims

1. A four-jaw chuck for clamping large castings, characterized in that, Includes a chuck body (1), on which four jaws (2) are provided, and the four jaws (2) can move and adjust in the radial direction of the chuck body (1); A fixing ring (3) is provided on one end face of the chuck body (1), and the fixing ring (3) and the chuck claw (2) are located on the same side of the chuck body (1); A rotating ring (4) is rotatably connected to the fixed ring (3). An annular platform (5) is provided on the outer end face of the rotating ring (4). Several radial threaded holes (12) are provided on the circumferential side wall of the annular platform (5). Fastening bolts (7) are screwed into the radial threaded holes (12). Several fastening bolts (7) can clamp the small circular stepped column of the large casting (6).

2. A four-jaw chuck for clamping large castings according to claim 1, characterized in that, The rotating ring (4) has several rotating shafts arranged around its circumference near the fixed ring (3), and bearings (8) are rotatably connected to the rotating shafts. The fixed ring (3) has an annular groove on the side near the rotating ring (4), and several bearings (8) can be fitted in the annular groove. The rotating ring (4) rotates on the fixed ring (3) through several bearings (8) and the annular groove.

3. A four-jaw chuck for clamping large castings according to claim 2, characterized in that, The annular groove is configured as a stepped groove (15), which includes a narrow groove (14) near the opening of the annular groove and a wide groove (13) located inside the annular groove. The width of the wide groove (13) is equal to the diameter of the bearing (8), and the width of the narrow groove (14) is less than the diameter of the bearing (8) but greater than the diameter of the shaft. The narrow groove (14) has an embedding groove (16) on its side wall that corresponds to the number and position of the bearings (8). The embedding groove (16) is connected to the wide groove (13), and the bearings (8) can enter the wide groove (13) through the embedding groove (16).

4. A four-jaw chuck for clamping large castings according to claim 3, characterized in that, The rotating shaft is provided with a shoulder screw (9), and the bearing (8) is provided on the shoulder screw (9); A collar (10) is provided on the shoulder screw (9) between the bearing (8) and the rotating ring (4), the diameter of which is smaller than the width of the narrow groove (14).

5. A four-jaw chuck for clamping large castings according to claim 4, characterized in that, The collar (10) is also fitted with a wear-resistant lubricating pad (11), the outer diameter of which is greater than the width of the wide groove (13).

6. A four-jaw chuck for clamping large castings according to claim 1, characterized in that, The claw (2) is staggered with the radial threaded hole (12) on the annular platform (5).

7. A four-jaw chuck for clamping large castings according to claim 1, characterized in that, After the jaws (2) clamp and position the large casting (6), the fastening bolts (7) move away from the large casting (6).

8. A four-jaw chuck for clamping large castings according to claim 1, characterized in that, The fixing ring (3) is detachably connected to one end face of the chuck body (1).

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