Variable-diameter positioning telescopic chuck

Abstract

The utility model relates to mechanical processing manufacturing technical field, concretely is a kind of variable-diameter positioning telescopic chuck, including base, inner support claw subassembly, rotary slide disc and rotating shaft, base is disc structure, several inner support claw subassembly with base center as circle center is evenly distributed and is installed on base, inner support claw subassembly is composed of inner support claw body and slide bar, the outside of inner support claw body is set into the convex annular surface, roller is installed on slide bar, slide bar is installed on base along with base radial slidingly, rotary slide disc is rotatably installed on base, rotating shaft is fixedly connected on rotary slide disc, arc-shaped slide way for guiding inner support claw subassembly along with base radial sliding when rotating is set on rotary slide disc and matched with roller. This variable-diameter positioning telescopic chuck is suitable for multiple size parts, easy to operate, reduces clamping stress, transmission and locking are reliable, lubrication is good, and wear is small, and structure is simple, and manufacturing cost is low.

Description

Technical Field

[0001] This utility model relates to the field of mechanical processing and manufacturing technology, specifically to a variable diameter positioning telescopic chuck. Background Technology

[0002] In the machining fields of aerospace and other industries, lathes and milling machines are often used to perform machining operations on many large, thin-walled parts. However, existing general-purpose chucks use a 3-point internal support method. When applied to large, thin-walled parts, this 3-point support mode will subject the product to significant stress, which will seriously affect the machining accuracy and make it difficult to meet the requirements of high-precision machining.

[0003] Using specialized tooling to clamp large, thin-walled parts may solve the problems caused by general-purpose chucks to some extent, but it will result in high tooling costs, waste of resources, and difficulty in controlling production costs.

[0004] Furthermore, the clamping process for large, thin-walled parts demands a high level of skill from operators. Due to the special nature of the parts and the complexity of clamping, ordinary workers often struggle to perform the clamping operation skillfully and accurately, leading to operational difficulties that not only affect production efficiency but may also cause quality problems due to improper operation. Therefore, developing a clamping tool that can effectively solve the above problems is urgently needed. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a variable diameter positioning telescopic chuck. This variable diameter positioning telescopic chuck is adaptable to parts of various sizes, is easy to operate, reduces clamping stress, has reliable transmission and locking, good lubrication and low wear, and has a simple structure and low manufacturing cost.

[0006] The technical solution of this utility model is as follows: A variable-diameter positioning telescopic chuck includes a base, inner support claw assemblies, a rotating slide plate, and a rotating shaft. The base is a disc structure, and several inner support claw assemblies are evenly distributed around the center of the base. Each inner support claw assembly consists of an inner support claw body and a slide rod. The outer side of the inner support claw body is provided with a raised annular surface. Rollers are installed on the slide rod, which is slidably mounted on the base along the radial direction of the base. The rotating slide plate is rotatably mounted on the base, and a rotating shaft is fixedly connected to the rotating slide plate. The rotating slide plate is provided with an arc-shaped slide rail that cooperates with the rollers to guide the inner support claw assemblies to slide radially along the base during rotation.

[0007] The base is provided with several guide grooves that cooperate with the slide rod, and the slide rod can slide radially along the guide grooves on the base.

[0008] An inner support claw cover is provided at the top of the guide groove. The inner support claw cover is fixedly connected to the base. A roller groove is provided on the inner support claw cover for the roller to slide through.

[0009] The rotary slide plate consists of a plate body and a cylindrical platform. The slide is set on the plate body. A rotary shaft insertion hole is set in the center of the rotary slide plate. A keyway is set in the rotary shaft insertion hole. The rotary shaft is fixedly connected to the rotary slide plate by a flat key. A central through hole is set in the center of the base. The cylindrical platform passes through the central through hole.

[0010] The rotating slide plate is rotatably mounted on the base via bearings.

[0011] The inner bearing ring cap and the outer bearing ring cap are fixedly connected to the rotating slide plate and the base, respectively, for fixing the inner and outer rings of the bearing.

[0012] A lubrication ring is installed between the top of the rotating slide plate and the top of the base.

[0013] The lubricating ring is made of polytetrafluoroethylene.

[0014] The top of the base is provided with a lubrication ring mounting groove, and the lubrication ring is installed in the lubrication ring mounting groove.

[0015] A locking plate for locking the rotating slide plate is fixedly installed on the base. A locking hole with clearance fit to the cylindrical platform is provided in the middle of the locking plate. The locking plate is divided into a fixed part and a movable part with the center of the locking hole as the boundary. One end of the movable part is completely separated from the fixed part, and the other end of the movable part is partially separated from the fixed part through a movable groove. The side of the movable part that is completely separated from the fixed part can move closer to or away from the cylindrical platform around the side of the partial separation. A locking screw hole is provided on the side of the fixed part that is completely separated. The movable part is moved closer to the cylindrical platform by the locking screw threaded into the locking screw hole on the side of the movable part that is completely separated, so that the locking plate locks the cylindrical platform.

[0016] The beneficial effects of this utility model are as follows: 1. This utility model discloses a variable diameter positioning telescopic chuck. The variable diameter positioning telescopic chuck, through the cooperation of the arc-shaped slide on the rotating slide plate and the roller on the inner support claw assembly, guides the inner support claw assembly to slide radially along the base when the rotating slide plate rotates, thereby changing the telescopic diameter of the chuck. This allows the chuck to automatically adjust the position of the inner support claw according to different part sizes, and the clamping diameter range is flexible and variable, which can meet the clamping requirements of parts of various sizes, greatly improving the versatility and adaptability of the chuck, and is especially suitable for clamping metal workpieces of various sizes in the fields of aviation and aerospace.

[0017] 2. The present invention discloses a variable diameter positioning telescopic chuck. The variable diameter positioning telescopic chuck has been optimized in design and the operation process is relatively simple. The operator can use the transmission shaft of the machine tool to realize the clamping and loosening of the inner support claw assembly. There is no need for complicated operation procedures and high skill level, which reduces the skill requirements of the operator, reduces problems caused by operation difficulties, and improves production efficiency.

[0018] 3. The present invention discloses a variable diameter positioning telescopic chuck. Compared with the three-point internal support method of the general chuck, the variable diameter positioning telescopic chuck adopts a method of evenly distributing multiple internal support claw components to clamp the workpiece, which improves the force points of workpiece clamping, makes the force on the workpiece more uniform, effectively reduces clamping stress, thereby improving the machining accuracy of the workpiece and ensuring product quality.

[0019] 4. This utility model discloses a variable diameter positioning telescopic chuck. The variable diameter positioning telescopic chuck has a stable and reliable structure. A guide groove is provided on the base, and the slide rod can slide radially along the guide groove on the base, providing precise guidance for the movement of the inner support claw assembly and ensuring the stability and accuracy of the movement of the inner support claw assembly. At the same time, an inner support claw cover is provided at the top of the guide groove, and a roller groove is provided on the inner support claw cover for the roller to slide through, which further restricts the movement trajectory of the inner support claw assembly, prevents it from deviating or shaking during movement, and improves the overall structural stability of the chuck.

[0020] 5. This utility model discloses a variable diameter positioning telescopic chuck. The variable diameter positioning telescopic chuck has reliable transmission and a stable connection. The rotating slide plate is rotatably mounted on the base through bearings and is fixedly connected to the rotating shaft through a flat key. This connection method ensures that the rotating shaft can reliably transmit power to the rotating slide plate, so that the rotating slide plate can rotate smoothly. At the same time, the bearing inner ring cover and bearing outer ring cover are fixedly connected to the rotating slide plate and the base respectively, which effectively fixes the inner and outer rings of the bearing, prevents the bearing from loosening or shifting during operation, and ensures the reliability and stability of the chuck transmission.

[0021] 6. This utility model discloses a variable-diameter positioning telescopic chuck. The chuck features a lubricating ring made of polytetrafluoroethylene (PTFE) installed between the top of the rotating slide plate and the top of the base. PTFE has a very low coefficient of friction, making it an excellent self-lubricating material. When the rotating slide plate is in operation, the lubricating ring utilizes its material properties to reduce friction, thereby reducing wear between the rotating slide plate and the base, extending the chuck's service life, and simultaneously reducing heat generated by friction, ensuring the chuck's normal operation. A lubricating ring mounting groove is provided on the top of the base, facilitating the installation and fixing of the lubricating ring and ensuring its stable lubrication function.

[0022] 7. This utility model discloses a variable diameter positioning telescopic chuck. The variable diameter positioning telescopic chuck has a reliable locking function. The locking plate fixedly installed on the base can effectively lock the rotating slide plate. The unique structural design of the locking plate allows its movable part to move closer to or away from the cylindrical platform around the partial separation side. Through the threaded engagement of the locking screw and the locking screw hole, one side of the movable part can be moved closer to the cylindrical platform, thereby realizing the locking plate locking the cylindrical platform and preventing the rotating slide plate from rotating unexpectedly during operation, ensuring the stability and safety of the chuck clamping the workpiece.

[0023] 8. The present invention discloses a variable diameter positioning telescopic chuck. The overall structure of the variable diameter positioning telescopic chuck is relatively simple, and the design and manufacturing process of its parts are relatively conventional. It can be manufactured using traditional machining methods without special processing procedures and equipment. This not only reduces the manufacturing cost of the chuck but also shortens the production cycle and improves production efficiency, which is conducive to large-scale promotion and application. At the same time, the simple structure also makes the maintenance of the chuck more convenient and reduces maintenance costs. Attached Figure Description

[0024] The advantages and solutions of this application will become clear to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this invention.

[0025] In the attached diagram: Figure 1 This is a three-dimensional exploded view of a variable diameter positioning telescopic chuck according to an embodiment of the present utility model; Figure 2 This is an exploded cross-sectional view of a variable diameter positioning telescopic chuck according to an embodiment of the present invention; Figure 3 This is a three-dimensional assembly diagram of a variable diameter positioning telescopic chuck according to an embodiment of the present utility model; Figure 4 This is a cross-sectional assembly diagram of a variable diameter positioning telescopic chuck according to an embodiment of the present utility model; Figure 5 This is a three-dimensional structural diagram of the base (partial cross-section) of a variable diameter positioning telescopic chuck according to an embodiment of the present utility model; Figure 6 This is a three-dimensional structural diagram (partial cross-section) of the bearing outer ring cover of a variable diameter positioning telescopic chuck according to an embodiment of the present utility model; Figure 7 This is a three-dimensional structural diagram of the inner support claw assembly of a variable diameter positioning telescopic chuck according to an embodiment of the present utility model. Figure 8This is a schematic cross-sectional view of the inner support claw assembly and roller of a variable diameter positioning telescopic chuck according to an embodiment of the present invention. Figure 9 This is a three-dimensional structural diagram of the inner support claw cover of a variable diameter positioning telescopic chuck according to an embodiment of the present utility model. Figure 10 This is a three-dimensional structural diagram of the lubrication ring of a variable diameter positioning telescopic chuck according to an embodiment of the present utility model; Figure 11 This is a three-dimensional structural diagram of the rotating slide plate of a variable diameter positioning telescopic chuck according to an embodiment of the present utility model; Figure 12 This is a three-dimensional structural diagram of the locking plate of a variable diameter positioning telescopic chuck according to an embodiment of the present utility model; Figure 13 This is a three-dimensional structural diagram of the rotating shaft of a variable diameter positioning telescopic chuck according to an embodiment of the present utility model. Figure 14 This is a three-dimensional structural diagram of a flat key for a variable-diameter positioning telescopic chuck according to an embodiment of the present utility model. Figure 15 This is a three-dimensional structural diagram of the bearing inner ring cover (partial cross-section) of a variable diameter positioning telescopic chuck according to an embodiment of the present utility model; The components represented by the various reference numerals in the diagram are: This utility model comprises: 1. Base, 110. Guide groove, 120. Lubricating ring mounting groove, 130. Central through hole, 2. Bearing, 3. Bearing outer ring cover, 4. Inner support claw assembly, 410. Inner support claw body, 420. Slide rod, 5. Inner support claw cover, 510. Roller groove, 6. Lubricating ring, 7. Rotary slide plate, 710. Slide, 720. Rotary shaft insertion hole, 730. Keyway, 740. Cylindrical platform, 8. Bearing inner ring cover, 9. Locking plate, 910. Locking hole, 920. Fixed part, 930. Movable part, 940. Movable groove, 10. Rotary shaft, 11. Flat key, 12. Roller, 13. Locking screw, 14. Roller shaft. Detailed Implementation

[0026] The variable diameter positioning telescopic chuck is suitable for various machine tools such as lathes, milling machines, and drilling machines. It is used for clamping metal workpieces with a rotation diameter of Φ456mm-Φ506mm, especially for large thin-walled parts in the aerospace field.

[0027] like Figures 1 to 15 As shown, the variable diameter positioning telescopic chuck consists of a base 1, a bearing 2, a bearing outer ring cover 3, an inner support claw assembly 4, an inner support claw cover 5, a lubrication ring 6, a rotating slide plate 7, a bearing inner ring cover 8, a locking plate 9, a rotating shaft 10, a flat key 11, a roller 12, a locking screw 13, and a roller shaft 14.

[0028] The base 1 is a disc structure with several guide grooves 110 that cooperate with the slide rod 420. The top is provided with a lubrication ring mounting groove 120 and the center has a central through hole 130.

[0029] The inner support claw assembly 4 consists of an inner support claw body 410 and a slide rod 420. The outer side of the inner support claw body 410 is a raised annular surface. The slide rod 420 is equipped with a roller 12 via a roller shaft 14. The roller shaft 14 is fixed on the slide rod 420, and the roller 12 is fitted on it. The slide rod 420 slides radially along the guide groove 110 on the base 1. The inner support claw assembly 4 is evenly distributed with the center of the base 1 as the center.

[0030] The inner support claw cover 5 is fixed to the top of the guide groove 110 of the base 1, and is provided with a roller groove 510 for the roller 12 to slide through.

[0031] The rotating slide plate 7 consists of a plate body and a cylindrical platform 740. The plate body is provided with an arc-shaped slide 710 that cooperates with the roller 12. There is a rotating shaft insertion hole 720 in the center, and a keyway 730 is provided in the hole. The rotating slide plate 7 is rotatably mounted on the base 1 through the bearing 2. The cylindrical platform 740 passes through the central through hole 130 of the base 1.

[0032] The bearing 2 is mounted on the base 1. The bearing outer ring cover 3 and the bearing inner ring cover 8 are fixed on the rotating slide plate 7 and the base 1, respectively, to fix the inner and outer rings of the bearing 2.

[0033] The lubrication ring 6 is made of polytetrafluoroethylene and is installed in the lubrication ring mounting groove 120 of the base 1, located between the top of the rotating slide plate 7 and the top of the base 1 to reduce friction.

[0034] The rotating shaft 10 is fixedly connected to the rotating shaft insertion hole 720 of the rotating slide plate 7 via a flat key 11.

[0035] The locking plate 9 is fixedly mounted on the base 1, and has a locking hole 910 in the center that fits with the cylindrical platform 740 with a clearance. The locking plate 9 is divided into a fixed part 920 and a movable part 930, with the center of the locking hole 910 as the boundary. One end of the movable part 930 is completely separated from the fixed part 920, while the other end is partially separated through a movable groove 940. The completely separated side of the fixed part 920 has a locking screw hole, and the completely separated side of the movable part 930 is threadedly engaged with the locking screw hole by a locking screw 13, causing one side of the movable part 930 to move closer to the cylindrical platform 740, thus locking the cylindrical platform 740.

[0036] The variable diameter positioning telescopic chuck drives the rotating shaft 10 to rotate left and right via the machine tool transmission shaft. The rotating shaft 10 transmits power to the rotating slide plate 7 via the flat key 11. When the rotating slide plate 7 rotates, the arc-shaped slide 710 on it drives the roller 12, thereby causing the inner support claw assembly 4 to slide radially along the base 1, realizing the change of the chuck's telescopic diameter. After clamping, the locking plate 9 is locked with the locking screw 13 to fix the rotating slide plate 7.

[0037] This variable diameter positioning telescopic chuck is easy to operate. Workers can clamp and release it using the machine tool drive shaft. The clamping range is Φ456mm-Φ506mm. The inner support claw assembly 4 can be automatically adjusted according to the size of the part. The clamping range can also be changed by replacing the inner support claw assembly 4.

[0038] This variable diameter positioning telescopic chuck is highly adaptable and can be installed on vertical and horizontal lathes and milling machines. It is connected to the machine tool via a base 1 and a rotating shaft 10, and is connected using a connecting shaft and a flat key.

[0039] This variable-diameter positioning telescopic chuck can reduce clamping stress. Multiple internal support jaw assemblies 4 are evenly distributed, improving the workpiece clamping force points. It can replace a general three-jaw chuck, reduce clamping stress on large thin-walled parts, and improve machining accuracy.

[0040] This variable-diameter positioning telescopic chuck has low manufacturing and maintenance costs, a simple structure, and can be manufactured using traditional machining without special processing steps. The design of components such as the lubrication ring 6 reduces wear and lowers maintenance costs.

Claims

1. A variable-diameter positioning telescopic chuck, characterized in that, The system includes a base (1), an inner support claw assembly (4), a rotating slide plate (7), and a rotating shaft (10). The base (1) is a disc structure. Several inner support claw assemblies (4) are evenly distributed around the center of the base (1) on the base (1). The inner support claw assembly (4) consists of an inner support claw body (410) and a slide rod (420). The outer side of the inner support claw body (410) is provided as a raised annular surface. A roller (12) is installed on the slide rod (420). The slide rod (420) can be slidably installed on the base (1) along the radial direction of the base (1). The rotating slide plate (7) is rotatably installed on the base (1). A rotating shaft (10) is fixedly connected to the rotating slide plate (7). The rotating slide plate (7) is provided with an arc-shaped slide (710) that cooperates with the roller (12) to guide the inner support claw assembly (4) to slide radially along the base (1) during rotation.

2. The variable diameter positioning telescopic chuck according to claim 1, characterized in that, The base (1) is provided with a plurality of guide grooves (110) that cooperate with the slide rod (420), and the slide rod (420) can slide radially along the guide grooves (110) on the base (1).

3. A variable diameter positioning telescopic chuck according to claim 2, characterized in that, An inner support claw cover (5) is provided on the top of the guide groove (110). The inner support claw cover (5) is fixedly connected to the base (1). A roller groove (510) is provided on the inner support claw cover (5) for the roller (12) to slide through.

4. A variable diameter positioning telescopic chuck according to claim 1, characterized in that, The rotating slide plate (7) consists of a plate body and a cylindrical platform (740). The slide (710) is set on the plate body. A rotating shaft insertion hole (720) is provided in the center of the rotating slide plate (7). A keyway (730) is provided in the rotating shaft insertion hole (720). The rotating shaft (10) is fixedly connected to the rotating slide plate (7) through a flat key (11). A central through hole (130) is provided in the center of the base (1). The cylindrical platform (740) passes through the central through hole (130).

5. A variable diameter positioning telescopic chuck according to claim 1, characterized in that, The rotating slide plate (7) is rotatably mounted on the base (1) via a bearing (2).

6. A variable diameter positioning telescopic chuck according to claim 5, characterized in that, The inner ring cover (8) and the outer ring cover (3) of the bearing (2) are fixedly connected to the rotating slide plate (7) and the base (1), respectively.

7. A variable diameter positioning telescopic chuck according to claim 4, characterized in that, A lubrication ring (6) is installed between the top of the rotating slide plate (7) and the top of the base (1).

8. A variable diameter positioning telescopic chuck according to claim 4, characterized in that, The lubricating ring (6) is made of polytetrafluoroethylene.

9. A variable diameter positioning telescopic chuck according to claim 4, characterized in that, The base (1) is provided with a lubrication ring mounting groove (120) on its top, and the lubrication ring (6) is installed in the lubrication ring mounting groove (120).

10. A variable diameter positioning telescopic chuck according to claim 1, characterized in that, A locking plate (9) for locking the rotating slide plate (7) is fixedly installed on the base (1). A locking hole (910) that fits with the cylindrical platform (740) is provided in the middle of the locking plate (9). The locking plate (9) is divided into a fixed part (920) and a movable part (930) with the center of the locking hole (910) as the boundary. One end of the movable part (930) is completely separated from the fixed part (920), and the other end of the movable part (930) is connected to the fixed part (920) through a movable part. The moving groove (940) is partially separated. The side of the moving part (930) and the fixed part (920) that is completely separated can move closer to or away from the cylindrical platform (740) around the side of the partial separation. A locking screw hole is provided on the side of the fixed part (920) that is completely separated. On the side of the moving part (930) that is completely separated, the locking screw (13) is threadedly engaged with the locking screw hole to move one side of the moving part (930) closer to the cylindrical platform (740) so that the locking plate (9) locks the cylindrical platform (740).

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