A motorless indexing chuck

Abstract

This invention provides a motorless indexing chuck, including a chuck housing, a lathe connection assembly for connecting to a lathe, a transmission clutch component, and a bidirectional transmission assembly. The output end of the bidirectional transmission assembly is connected to a clamping component. Power from the lathe is transmitted to the clamping drive assembly's clamping direct drive rod, providing power for both clamping and indexing rotation. This significantly reduces the overall size and weight of the chuck, simplifying the equipment structure. A damping sleeve controls the damping of the clamping drive screw, enabling indexing rotation of the workpiece. This achieves linked control of clamping and indexing rotation, simplifying the operation process. The transmission clutch component facilitates smooth switching of power between the clamping drive and the housing transmission.

Description

Technical Field

[0001] This invention relates to the field of auxiliary equipment for CNC machining equipment, and more specifically, to a motorless indexing and clamping chuck. Background Technology

[0002] In the field of machining, especially in lathe machining, indexing chucks are key tooling tools mainly used to achieve stable clamping of workpieces and indexing rotation of workpieces to achieve better machining accuracy and improve machining efficiency. However, existing indexing chucks generally suffer from unreasonable structural design and poor functional coordination, making it difficult to balance clamping stability, indexing accuracy and the need for lightweight equipment, which seriously restricts the improvement of machining efficiency and quality.

[0003] Existing indexing chucks generally require an independent drive motor to power the clamping and rotating mechanisms. As an independent component, the motor needs to be additionally mounted and fixed to the chuck or lathe frame, increasing the overall size and weight of the chuck. This results in a complex equipment structure, occupies more installation space around the machine tool, and significantly increases the manufacturing cost of the chuck. The installation and maintenance process of the independent motor is cumbersome, and the vibration generated during motor operation can be transmitted to the chuck body, affecting clamping and indexing accuracy, and may even lead to safety hazards such as wear of the transmission structure and loosening or falling off of the workpiece. Some hydraulically driven indexing chucks also require an independent hydraulic station, further increasing the complexity and operating cost of the equipment, and posing additional risks such as hydraulic oil leakage.

[0004] The indexing rotation and workpiece clamping actions of existing indexing chucks require separate control, lacking an effective linkage and coordination mechanism. In traditional indexing chucks, the clamping action and the indexing rotation action are driven by two independent transmission systems and control modules. The clamping action relies on one drive mechanism to clamp and release the jaws, while the indexing rotation relies on another drive mechanism to rotate the chuck body. The operation process of the separate control method is cumbersome, requiring operators to control the start, stop, and coordination of the two actions separately, increasing the difficulty and labor intensity of operation, and easily causing problems such as action delays and misalignments, resulting in low processing efficiency. The setting of two independent transmission systems increases the structural complexity of the chuck, affects the indexing accuracy and clamping stability, and makes it difficult to meet the requirements of high-precision and automated processing. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the above-mentioned conventional technology and provide a motorless indexing chuck that uses a machine tool to provide power to clamp and index the workpiece without affecting the workpiece processing.

[0006] The objective of this invention is achieved through the following technical measures: A motorless indexing and clamping chuck, characterized in that: it includes a chuck housing, the chuck housing is connected to a lathe connecting assembly for connecting to a lathe, the lathe connecting assembly is connected to a transmission clutch component, the transmission clutch component includes a clamping drive assembly, the output end of the clamping drive assembly is connected to the input end of a bidirectional transmission assembly, the output end of the bidirectional transmission assembly is connected to a clamping component, the clamping component includes a clamping transmission assembly, the clamping transmission assembly is drively connected to a main clamping assembly and an auxiliary clamping assembly, and the clamping drive assembly is connected to a movable clutch assembly. The component includes a movable clutch assembly connected to a housing transmission assembly, which is connected to a chuck housing. The clamping drive assembly includes a clamping direct drive rod, the output end of which is fixedly connected to a direct drive shaft. A drive clutch disc is fixedly connected to the outer side of the clamping direct drive rod. The movable clutch assembly includes a movable clutch disc, which is rotatably connected to the clamping direct drive rod. The housing transmission assembly includes a housing transmission sleeve, the outer side of which is fixedly connected to a housing transmission disk, which is fixedly connected to the chuck housing.

[0007] As an improvement: a drive lever is fixedly connected to one side surface of the drive clutch disc, a first engagement groove is formed on the drive clutch disc, a driven ring is fixedly connected to the side surface of the movable clutch disc near the drive clutch disc, a driven lever is fixedly connected to the driven ring, the drive lever and the driven lever are arranged on the same diameter circular path, and a second engagement groove is formed on the movable clutch disc, the second engagement groove is arranged in a position corresponding to the first engagement groove.

[0008] As an improvement: a locking tongue mounting groove is provided inside the outer casing transmission sleeve, one end of a locking tongue spring is fixedly connected to the locking tongue mounting groove, and the other end of the locking tongue spring is fixedly connected to an engaging transmission locking tongue, which is respectively engaged and connected with the first engaging groove and the second engaging groove.

[0009] As an improvement: a drive groove edge is provided on one side of the first fitting groove, a first separation slope is provided on the other side of the first fitting groove, a transmission groove edge is provided on one side of the second fitting groove, a second separation slope is provided on the other side of the second fitting groove, the drive groove edge and the transmission groove edge are provided correspondingly, and the first separation slope and the second separation slope are provided correspondingly.

[0010] As an improvement: the bidirectional transmission assembly includes a bidirectional transmission box, the input end of which is fixedly connected to a power transmission shaft, the power transmission shaft is fixedly connected to a direct drive transmission shaft, the other end of which is fixedly connected to a power transmission worm gear, and the power transmission worm gear is driven by a power transmission worm wheel.

[0011] As an improvement: the clamping transmission assembly includes a clamping power input rod, one end of which is fixedly connected to a power transmission worm gear, the other end of which is connected to the input end of a power reversing gearbox, the output end of which is fixedly connected to a clamping power output rod, and an auxiliary clamping worm and a main clamping worm are fixedly connected to the clamping power output rod.

[0012] As an improvement: the main clamping assembly includes a clamping drive screw, a screw damping sleeve is sleeved on the outside of the clamping drive screw, a screw drive worm gear is threadedly connected to the clamping drive screw, the screw drive worm gear is meshed with the main clamping worm, a clamping mounting plate is fixedly connected to the end of the clamping drive screw, and a plurality of clamping auxiliary plates are fixedly connected to the lower surface of the clamping mounting plate, and clamping limiting grooves are formed on the plurality of clamping auxiliary plates.

[0013] As an improvement: the auxiliary clamping assembly includes an auxiliary clamping screw, an auxiliary clamping worm gear is threaded onto the auxiliary clamping screw, the auxiliary clamping worm gear is meshed with the auxiliary clamping worm, and an auxiliary clamping plate is fixedly connected to the end of the auxiliary clamping screw.

[0014] As an improvement: the lathe connection assembly includes a lathe connection flange, a transmission connection flange is fixedly connected to the lathe connection flange, the transmission connection flange is fixedly connected to the clamping direct drive transmission rod near the center position, a bearing support ring is fixedly connected to the transmission connection flange near the outer circumference, and a housing rotation bearing ring is rotatably connected between the bearing support ring and the chuck housing.

[0015] By adopting the above technical solution, the present invention has the following advantages compared with the prior art: The lathe connection assembly allows the entire chuck to be mounted on the lathe without the need for a separate drive motor. The lathe's own power is used for propulsion, transmitting power to the clamping drive assembly's direct-drive transmission rod, providing power for both clamping and indexing rotation. This significantly reduces the overall size and weight of the chuck, simplifies the equipment structure, avoids the cumbersome process of installing and maintaining a separate motor, and eliminates the adverse effects of motor vibration on chuck clamping and indexing accuracy. It also reduces safety hazards such as wear on the transmission structure and workpiece loosening or falling off. A screw damping sleeve controls the damping of the clamping drive screw. When the main clamping assembly fully clamps the workpiece, the clamping drive screw breaks free from the damping sleeve, thus achieving indexing rotation of the workpiece. This achieves linked control of clamping and indexing rotation, simplifying the operation process and improving efficiency. The improved processing efficiency and coordination stability eliminate the need for operators to separately control the initiation and coordination of two actions, reducing operational difficulty and labor intensity, significantly improving processing efficiency, reducing structural complexity, and enhancing indexing accuracy and clamping stability. This meets the requirements of high-precision and automated processing. The integrated transmission clutch mechanism utilizes the lathe's power to drive the clamping components. When the lathe's power is transmitted to the clamping direct drive rod, the drive clutch disc rotates via the drive and driven blocks. The engagement transmission lock tongue engages with the first and second engagement slots, enabling smooth switching of power between clamping drive and housing transmission. It can drive the bidirectional transmission assembly and clamping transmission assembly, driving the main clamping assembly and auxiliary clamping assembly to complete workpiece indexing rotation and clamping, or it can drive the chuck housing to rotate via the housing transmission assembly to achieve workpiece processing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0018] Figure 3 This is a three-dimensional structural diagram of the clamping component of the present invention.

[0019] Figure 4 This is a schematic diagram of the connection structure between the bidirectional transmission component and the clamping transmission component in this invention.

[0020] Figure 5 yes Figure 2 Exploded view of the clutch component in the transmission system.

[0021] Figure 6 yes Figure 5 A schematic diagram of the three-dimensional structure from another perspective.

[0022] In the diagram: 1. Chuck housing; 2. Lathe connecting assembly; 21. Lathe connecting flange; 22. Transmission connecting flange; 23. Bearing support ring; 24. Housing rotating bearing ring; 3. Transmission clutch assembly; 31. Clamping drive assembly; 311. Clamping direct drive transmission rod; 312. Direct drive transmission shaft; 313. Drive clutch disc; 314. Drive lever; 315. First engagement groove; 316. Drive groove edge; 317. First separation slope; 32. Movable clutch assembly; 321. Movable clutch disc; 322. Driven lever ring; 323. Driven lever; 324. Second engagement groove; 325. Transmission groove edge; 326. Second separation slope; 33. Housing transmission assembly; 331. Housing transmission sleeve; 332. Lock tongue mounting groove; 333. Lock tongue spring. 334. Engaging transmission lock tongue; 335. Housing transmission disc; 4. Bidirectional transmission assembly; 41. Bidirectional transmission box; 42. Power transmission shaft; 43. Power transmission worm; 44. Power transmission worm wheel; 5. Clamping component; 51. Clamping transmission assembly; 511. Clamping power input rod; 512. Power reversing gearbox; 513. Clamping power output rod; 514. Auxiliary clamping worm; 515. Main clamping worm; 52. Main clamping assembly; 521. Clamping drive screw; 522. Screw drive worm wheel; 523. Screw damping sleeve; 524. Clamping mounting plate; 525. Clamping auxiliary plate; 526. Clamping limit groove; 53. Auxiliary clamping assembly; 531. Auxiliary clamping screw; 532. Auxiliary clamping worm wheel; 533. Auxiliary clamping plate. Detailed Implementation

[0023] Example: Figures 1 to 6As shown, a motorless indexing chuck includes a chuck housing 1. The chuck housing 1 is connected to a lathe connecting assembly 2 for connecting to a lathe. The lathe connecting assembly 2 is connected to a transmission clutch component 3. The transmission clutch component 3 includes a clamping drive assembly 31. The output end of the clamping drive assembly 31 is connected to the input end of a bidirectional transmission assembly 4. The output end of the bidirectional transmission assembly 4 is connected to a clamping component 5. The clamping component 5 includes a clamping transmission assembly 51. The clamping transmission assembly 51 is drively connected to a main clamping assembly 52 and an auxiliary clamping assembly 53. The clamping drive assembly 31 is connected to a movable clutch assembly 32. The movable clutch assembly 32 is connected to a housing transmission assembly 33. The housing transmission assembly 33 is connected to the chuck housing 1. The clamping drive assembly 31 includes a clamping direct drive transmission rod 311, the output end of which is fixedly connected to a direct drive transmission shaft 312, and a drive clutch disc 313 is fixedly connected to the outside of the clamping direct drive transmission rod 311. The movable clutch assembly 32 includes a movable clutch disc 321, which is rotatably connected to the clamping direct drive transmission rod 311. The housing transmission assembly 33 includes a housing transmission sleeve 331, and a housing transmission disc 335 is fixedly connected to the outside of the housing transmission sleeve 331. The housing transmission disc 335 is fixedly connected to the chuck housing 1.

[0024] The lathe connection assembly 2 transmits power from the lathe to the clamping direct drive transmission rod 311, which in turn transmits power to the direct drive shaft 312, and then directly to the bidirectional transmission assembly 4, thereby providing sufficient driving force for the clamping component 5.

[0025] A drive lever 314 is fixedly connected to one side surface of the drive clutch disc 313. A first engagement groove 315 is provided on the drive clutch disc 313. A driven ring 322 is fixedly connected to one side surface of the movable clutch disc 321 near the drive clutch disc 313. A driven lever 323 is fixedly connected to the driven ring 322. The drive lever 314 and the driven lever 323 are arranged on the same diameter circular path. A second engagement groove 324 is provided on the movable clutch disc 321. The second engagement groove 324 is positioned corresponding to the first engagement groove 315. After the workpiece is clamped, the lathe rotation direction is changed, which causes the drive clutch disc 313 to drive the drive lever 314, which in turn causes the driven lever ring 322 to move, thereby causing the movable clutch disc 321 to rotate, so that the first engagement groove 315 on the drive clutch disc 313 and the second engagement groove 324 on the movable clutch disc 321 are in the same position.

[0026] The outer casing transmission sleeve 331 has a latch mounting groove 332. One end of a latch spring 333 is fixedly connected to the latch mounting groove 332, and the other end of the latch spring 333 is fixedly connected to an engaging transmission latch 334. The engaging transmission latch 334 is engaged with a first engaging groove 315 and a second engaging groove 324. When the first engaging groove 315 and the second engaging groove 324 are in the same position, the latch spring 333 applies an inward force to the engaging transmission latch 334, thereby causing the engaging transmission latch 334 to simultaneously insert into the first engaging groove 315 and the second engaging groove 324, realizing the power transmission between the outer casing transmission sleeve 331 and the clamping direct drive transmission rod 311.

[0027] A drive groove edge 316 is provided on one side of the first fitting groove 315, and a first separation slope 317 is provided on the other side of the first fitting groove 315. A transmission groove edge 325 is provided on one side of the second fitting groove 324, and a second separation slope 326 is provided on the other side of the second fitting groove 324. The drive groove edge 316 and the transmission groove edge 325 are provided correspondingly, and the first separation slope 317 and the second separation slope 326 are provided correspondingly. When the drive groove edge 316 corresponds to the transmission groove edge 325, rotating the clamping direct drive transmission rod 311 will drive the outer housing transmission sleeve 331 to rotate synchronously, thereby driving the chuck outer housing 1. When the direct drive transmission rod 311 is clamped in reverse, the engagement transmission locking tongue 334 will compress the locking tongue spring 333 due to the setting of the first separation slope 317 and the second separation slope 326, thereby separating the engagement transmission locking tongue 334 from the first engagement groove 315 and the second engagement groove 324, thereby releasing the synchronous rotation of the clamping direct drive transmission rod 311 and the outer housing transmission sleeve 331.

[0028] The system enables smooth switching between clamping rotation and housing transmission. It can drive the bidirectional transmission assembly 4 and clamping transmission assembly 51, thereby driving the main clamping assembly 52 and auxiliary clamping assembly 53 to complete workpiece indexing rotation and clamping. Alternatively, it can drive the chuck housing 1 to rotate via the housing transmission assembly 33, enabling workpiece machining. The power transmission worm gear 43 and power transmission worm wheel 44 are meshed together with a gear ratio of 1:35, achieving power reduction and torque increase to ensure sufficient power for clamping operations. The power transmission worm wheel 44 is connected to the clamping power input rod 511 via a flat key, transmitting power to the clamping transmission assembly 51.

[0029] The clamping transmission assembly 51 includes a clamping power input rod 511, one end of which is fixedly connected to a power transmission worm gear 44, and the other end of which is connected to the input end of a power reversing gearbox 512. A clamping power output rod 513 is fixedly connected to the output end of the power reversing gearbox 512, and an auxiliary clamping worm gear 514 and a main clamping worm gear 515 are fixedly connected to the clamping power output rod 513. The power reversing gearbox 512 achieves a 90° reversal of power transmission, and the auxiliary clamping worm gear 514 and the main clamping worm gear 515 can be used to drive the main clamping assembly 52 and the auxiliary clamping assembly 53.

[0030] The main clamping assembly 52 includes a clamping drive screw 521, a screw damping sleeve 523 sleeved on the outside of the clamping drive screw 521, a screw drive worm gear 522 threadedly connected to the clamping drive screw 521, the screw drive worm gear 522 meshing with the main clamping worm gear 515, a clamping mounting plate 524 fixedly connected to the end of the clamping drive screw 521, and a plurality of clamping auxiliary plates 525 fixedly connected to the lower surface of the clamping mounting plate 524, each of the plurality of clamping auxiliary plates 525 having a clamping limiting groove 526. The screw-driven worm gear 522 drives the clamping drive screw 521 to move up and down, thereby driving the clamping mounting plate 524 to move up and down. The screw damping sleeve 523 applies a certain rotational resistance to the clamping drive screw 521 to prevent it from rotating during workpiece clamping. After the clamping drive screw 521 has finished clamping the workpiece, the screw-driven worm gear 522 continues to be driven, and the clamping drive screw 521 will overcome the resistance provided by the screw damping sleeve 523, causing it to rotate and thus driving the clamping mounting plate 524 to rotate. Multiple clamping auxiliary plates 525 can better clamp the workpiece. The clamping limiting groove 526 is V-shaped, which can better hold the surface of the arc-shaped workpiece, accurately positioning the workpiece and preventing displacement and shaking during processing.

[0031] The auxiliary clamping assembly 53 includes an auxiliary clamping screw 531, on which an auxiliary clamping worm gear 532 is threadedly connected. The auxiliary clamping worm gear 532 meshes with an auxiliary clamping worm 514. An auxiliary clamping plate 533 is fixedly connected to the end of the auxiliary clamping screw 531. The auxiliary clamping plate 533 mainly provides auxiliary clamping for the workpiece, preventing it from wobbling during processing due to a shift in the center of gravity, thus affecting processing accuracy.

[0032] The lathe connecting assembly 2 includes a lathe connecting flange 21, to which a transmission connecting flange 22 is fixedly connected. The transmission connecting flange 22 is fixedly connected to a clamping direct drive transmission rod 311 near its center. A bearing support ring 23 is fixedly connected to the outer circumference of the transmission connecting flange 22. A housing rotation bearing ring 24 is rotatably connected between the bearing support ring 23 and the chuck housing 1. The bearing support ring 23 is made of wear-resistant alloy steel and has an annular groove on its inner side. The housing rotation bearing ring 24 is embedded in the groove, realizing the rotational connection between the chuck housing 1 and the lathe connecting assembly 2, reducing the frictional resistance when the chuck housing 1 rotates, and ensuring the smoothness of the rotation of the chuck housing 1.

[0033] Working principle: When workpiece clamping is required, the lathe is driven to rotate, thereby causing the lathe connecting flange 21 to drive the transmission connecting flange 22, which in turn drives the clamping direct drive transmission rod 311 to rotate. This, in turn, drives the power transmission shaft 42 to rotate via the direct drive transmission shaft 312. Through the meshing transmission of the power transmission worm 43 and the power transmission worm wheel 44, the power is transmitted to the clamping power input rod 511. After reversing through the power reversing gearbox 512, the power is transmitted to the clamping power output rod 513. This output power is then driven by the auxiliary clamping worm 514 to move the auxiliary clamping assembly 53, which in turn moves the main clamping worm 51. 5. The main clamping assembly 52 is driven to rotate. The main clamping worm 515 engages with the screw drive worm wheel 522, which in turn drives the clamping drive screw 521. Under the damping action of the screw damping sleeve 523, the clamping drive screw 521 is prevented from rotating, so that the clamping drive screw 521 only moves downward, driving the clamping mounting plate 524 to clamp the workpiece. After clamping is completed, the main clamping worm 515 is driven to transmit power to the screw drive worm wheel 522. At this time, the clamping drive screw 521 breaks through the damping action of the screw damping sleeve 523, realizing the indexing rotation of the workpiece.

[0034] After clamping and indexing rotation are completed, the lathe is driven to reverse, causing the drive block 314 on the drive clutch disc 313 to rotate the driven block 323 on the movable clutch disc 321, so that the first engagement groove 315 and the second engagement groove 324 are in the same position. At this time, the locking tongue spring 333 drives the engagement transmission locking tongue 334 to insert into the first engagement groove 315 and the second engagement groove 324, driving the lathe to rotate forward. Under the action of the transmission groove edge 325 and the drive groove edge 316, the outer housing transmission sleeve 331 and the clamping direct drive transmission rod 311 rotate synchronously. The outer housing transmission sleeve 331 drives the outer housing transmission disc 335 to rotate, thereby causing the lathe to drive the chuck outer housing 1 to rotate.

[0035] After the machining is completed, the workpiece needs to be released and the lathe reversed so that the first separation slope 317 and the second separation slope 326 push the engagement transmission lock tongue 334 to disengage from the first engagement groove 315 and the second engagement groove 324, so that the outer housing transmission sleeve 331 and the clamping direct drive transmission rod 311 can rotate synchronously.

Claims

1. A motorless indexing and clamping chuck, characterized in that: The system includes a chuck housing (1), which is connected to a lathe connection assembly (2) for connecting to a lathe. The lathe connection assembly (2) is connected to a transmission clutch component (3), which includes a clamping drive assembly (31). The output end of the clamping drive assembly (31) is connected to the input end of a bidirectional transmission assembly (4). The output end of the bidirectional transmission assembly (4) is connected to a clamping component (5), which includes a clamping transmission assembly (51). The clamping transmission assembly (51) is drively connected to a main clamping assembly (52) and an auxiliary clamping assembly (53). The clamping drive assembly (31) is connected to a movable clutch assembly (32). A housing transmission assembly (33) is connected to a chuck housing (1). The clamping drive assembly (31) includes a clamping direct drive rod (311), the output end of which is fixedly connected to a direct drive shaft (312). A drive clutch disc (313) is fixedly connected to the outside of the clamping direct drive rod (311). A movable clutch assembly (32) includes a movable clutch disc (321), which is rotatably connected to the clamping direct drive rod (311). The housing transmission assembly (33) includes a housing transmission sleeve (331), the outside of which is fixedly connected to a housing transmission disc (335). The movable disc (335) is fixedly connected to the chuck housing (1). A drive lever (314) is fixedly connected to one side surface of the drive clutch disc (313). A first engagement groove (315) is provided on the drive clutch disc (313). A driven ring (322) is fixedly connected to the side surface of the movable clutch disc (321) near the drive clutch disc (313). A driven lever (323) is fixedly connected to the driven ring (322). The drive lever (314) and the driven lever (323) are arranged on the same diameter circular path. A second engagement groove (324) is provided on the movable clutch disc (321). The second engagement groove (324) is positioned corresponding to the first engagement groove (315). The housing transmission sleeve (331) has a locking tongue mounting groove (332) inside. One end of the locking tongue spring (333) is fixedly connected in the locking tongue mounting groove (332), and the other end of the locking tongue spring (333) is fixedly connected to the engagement transmission locking tongue (334). The engagement transmission locking tongue (334) is respectively engaged with the first engagement groove (315) and the second engagement groove (324). The main clamping assembly (52) includes a clamping drive screw (521). A screw damping sleeve (523) is sleeved on the outside of the clamping drive screw (521). The clamping drive screw (521) is threadedly connected to a screw drive worm gear (522), and a clamping mounting plate (524) is fixedly connected to the end of the clamping drive screw (521).The lower surface of the clamping mounting plate (524) is fixedly connected to multiple clamping auxiliary plates (525), and each of the multiple clamping auxiliary plates (525) is provided with a clamping limiting groove (526).

2. The motorless indexing chuck according to claim 1, characterized in that: A drive groove edge (316) is provided on one side of the first fitting groove (315), and a first separation slope (317) is provided on the other side of the first fitting groove (315). A transmission groove edge (325) is provided on one side of the second fitting groove (324), and a second separation slope (326) is provided on the other side of the second fitting groove (324). The drive groove edge (316) and the transmission groove edge (325) are provided in correspondence, and the first separation slope (317) and the second separation slope (326) are provided in correspondence.

3. The motorless indexing chuck according to claim 1, characterized in that: The bidirectional transmission assembly (4) includes a bidirectional transmission box (41), the input end of which is fixedly connected to a power transmission shaft (42), the power transmission shaft (42) is fixedly connected to a direct drive shaft (312), the other end of which is fixedly connected to a power transmission worm (43), and the power transmission worm (43) is connected to a power transmission worm wheel (44).

4. The motorless indexing chuck according to claim 3, characterized in that: The clamping transmission assembly (51) includes a clamping power input rod (511), one end of which is fixedly connected to a power transmission worm gear (44), and the other end of which is connected to the input end of a power reversing gearbox (512). The output end of the power reversing gearbox (512) is fixedly connected to a clamping power output rod (513), and an auxiliary clamping worm gear (514) and a main clamping worm gear (515) are fixedly connected to the clamping power output rod (513).

5. A motorless indexing chuck according to claim 4, characterized in that: The screw drive worm gear (522) is meshed with the main clamping worm (515).

6. The motorless indexing chuck according to claim 5, characterized in that: The auxiliary clamping assembly (53) includes an auxiliary clamping screw (531), an auxiliary clamping worm gear (532) is threaded onto the auxiliary clamping screw (531), the auxiliary clamping worm gear (532) is meshed with the auxiliary clamping worm (514), and an auxiliary clamping plate (533) is fixedly connected to the end of the auxiliary clamping screw (531).

7. The motorless indexing chuck according to claim 1, characterized in that: The lathe connection assembly (2) includes a lathe connection flange (21), which is fixedly connected to a transmission connection flange (22). The transmission connection flange (22) is fixedly connected to a clamping direct drive transmission rod (311) near the center position. A bearing support ring (23) is fixedly connected to the outer circumference of the transmission connection flange (22). A housing rotation bearing ring (24) is rotatably connected between the bearing support ring (23) and the chuck housing (1).

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