Tool clamp for milling artificial joint

Abstract

The invention relates to the field of precision machining, in particular to an artificial joint milling tool clamp which comprises an attaching unit, and the attaching unit comprises a connecting shaft rotationally arranged on a connecting sleeve, a first connecting block arranged on the connecting shaft, an abutting block arranged on the first connecting block and an attaching assembly arranged on the connecting shaft. According to the device, the two clamping assemblies are arranged to clamp different positions of the artificial joint in a sectional mode, meanwhile, through cooperation of the connecting shaft and the attaching assembly, the abutting block is matched with the contact face of the artificial joint, the artificial joint is evenly clamped, uneven stress of the artificial joint is prevented, the artificial joint is clamped to be immovable through one clamping assembly, and the clamping effect is good. The clamping position of the other clamping assembly is changed, so that the machine tool can comprehensively machine the artificial joint under the condition that the position state of the artificial joint is not changed, the posture of the artificial joint is prevented from being adjusted again, the operation difficulty is reduced, and the machining efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of precision machining, in particular to a fixture for milling artificial joints. Background Art

[0002] The main function of artificial joints is to replace natural joints that have lost function due to disease or injury, thereby relieving pain, improving joint function, and enhancing the patient's quality of life.

[0003] Due to individual differences among patients, some patients cannot perfectly match standardized artificial joints and need customized artificial joints or high-precision milling adjustments to standardized artificial joints to meet the patients' needs. However, due to the irregular shape of artificial joints, conventional clamps commonly used in current precision CNC machining machines are used to clamp artificial joints, which can easily lead to uneven force on the artificial joints when clamped, affecting the mechanical processing of the artificial joints. In addition, the clamped parts cannot be processed and the clamping state of the artificial joints needs to be readjusted. The operation steps are cumbersome and difficult. Summary of the Invention

[0004] In view of the problem in the above or existing technologies that the shape of artificial joints is irregular, conventional clamps commonly used in current precision CNC machining machines are used to clamp artificial joints, which easily leads to uneven force on the artificial joints when clamped, affecting the mechanical processing of the artificial joints, the present invention is proposed.

[0005] Therefore, the object of the present invention is to provide a fixture for milling an artificial joint.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: including a machine tool body, a turntable arranged on the machine tool body, a motor arranged on the machine tool body for driving the turntable, a hydraulic rod arranged on the motor, a clamping unit arranged on the driving end of the hydraulic rod, and also including a bonding unit arranged on the clamping unit, the bonding unit including a connecting shaft rotatably arranged on the connecting sleeve, a connecting block 1 arranged on the connecting shaft, an abutment block arranged on the connecting block 1, and a bonding assembly arranged on the connecting shaft; two groups of hydraulic rods are arranged on the turntable, and the driving directions of the two groups of hydraulic rods are the same; the artificial joint is clamped in sections by the clamping units on the two groups of hydraulic rods, and the artificial joint is further bonded in cooperation with the bonding unit to maintain the stability of the clamped artificial joint.

[0007] As a preferred solution of the tooling fixture for milling artificial joints of the present invention, the clamping unit includes a fixing component arranged on the driving end of the hydraulic rod, an adjusting component arranged on the fixing component, and a clamping component arranged on the adjusting component.

[0008] As a preferred solution of the tooling fixture for milling artificial joints of the present invention, the fixing component includes a fixed block arranged on the driving end of the hydraulic rod, a sliding hole arranged on the fixed block, a rotating block rotatably arranged on the fixed block, and a threaded hole one arranged on the rotating block and connected to the sliding hole.

[0009] As a preferred solution of the tooling fixture for milling artificial joints of the present invention, the adjustment component includes a screw rod slidably set on the fixed block and cooperating with the threaded hole 1, a limiting groove set on the screw rod 1 and cooperating with the sliding hole, and a fastening nut set on the screw rod 1.

[0010] As a preferred solution of the tooling fixture for milling artificial joints of the present invention, the clamping assembly includes a lifting block arranged on screw one, a gear rotatably arranged on the lifting block, screw two arranged at both ends of the gear and coaxial with the gear, the two groups of screw twos have opposite thread rotation directions, a worm arranged on the lifting block for driving the gear, and a connecting sleeve arranged on screw two.

[0011] As a preferred solution of the fixture for milling artificial joints of the present invention, the lifting block is provided with a movable cavity for cooperating with the connecting sleeve; the connecting sleeve is provided with a threaded hole 2 for cooperating with the screw rod 2.

[0012] As a preferred solution of the tooling fixture for milling artificial joints of the present invention, the fitting component includes a screw rod three arranged on the connecting shaft, a connecting block two rotatably arranged on the end of the screw rod three, and a rotating shaft two arranged on the connecting block two.

[0013] As a preferred solution of the fixture for milling artificial joints of the present invention, a rotating shaft 1 and a threaded hole 3 for matching with a screw rod 3 are provided on the connecting shaft.

[0014] As a preferred solution of the tooling fixture for milling artificial joints of the present invention, wherein: a movable groove is provided on the connecting block 1 to match the connecting shaft, and a connecting hole is provided on the movable groove 1 to match the rotating shaft 1.

[0015] As a preferred solution of the fixture for milling artificial joints of the present invention, the abutment block is provided with a movable groove 2 for matching the screw 3, and the inner wall of the connecting block 2 is provided with a connecting hole 2 for matching the rotating shaft 2.

[0016] The beneficial effects of the tooling fixture for milling artificial joints of the present invention: the present invention performs segmented clamping on different positions of the artificial joint through the setting of two groups of clamping components, and at the same time, through the cooperation of the connecting shaft and the fitting component, the abutment block cooperates with the contact surface of the artificial joint to uniformly clamp the artificial joint to prevent uneven force on the artificial joint. Then, one group of clamping components is used to clamp the artificial joint while changing the clamping position of the other group of clamping components. When the position state of the artificial joint itself remains unchanged, the machine tool can realize comprehensive processing of the artificial joint, avoid re-adjusting the posture of the artificial joint, reduce the difficulty of operation, and improve processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic diagram of the overall structure of the tooling fixture used for milling artificial joints.

[0019] Figure 2 This is a schematic diagram of the front view of the tooling fixture used for milling artificial joints.

[0020] Figure 3 This is a schematic diagram of the structure of the clamping unit of the tooling fixture used for milling of artificial joints.

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the fixed block of the fixture used for milling artificial joints.

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of the lifting block of the fixture used for milling of artificial joints.

[0023] Figure 6 This is a schematic diagram of the structure of the fitting unit of the tooling fixture used for milling of artificial joints.

[0024] Figure 7 This is a schematic diagram of the cross-sectional structure of the connecting block 1 of the fixture for milling artificial joints.

[0025] Figure 8 This is a schematic diagram of the structure of the connecting shaft of the fixture used for milling artificial joints.

[0026] Figure 9 This is a schematic diagram of the structure of the connecting block 1 of the fixture for milling artificial joints.

[0027] Figure 10This is a schematic diagram of the structure of the abutment block of the fixture used for milling artificial joints.

[0028] In the figure: 1. Machine tool body; 2. Turntable; 3. Motor; 4. Hydraulic rod; 5. Clamping unit; 51. Fixing assembly; 511. Fixing block; 512. Sliding hole; 513. Rotating block; 514. Threaded hole 1; 52. Adjusting assembly; 521. Screw 1; 522. Limiting groove; 523. Fastening nut; 53. Clamping assembly; 531. Lifting block; 5311. Movable cavity; 532. Gear; 533. Screw 2; 534. Worm; 535. Connecting sleeve; 5351. Threaded hole 2; 6. Fitting unit; 61. Connecting shaft; 611. Rotating shaft 1; 612. Threaded hole 3; 62. Connecting block 1; 621. Movable groove 1; 622. Connecting hole 1; 63. Abutment block; 631. Movable groove 2; 632. Connecting hole 2; 64. Fitting assembly; 641. Screw 3; 642. Connecting block 2; 643. Rotating shaft 2; 7. Artificial joint. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0030] Example 1, reference Figure 1-Figure 3, which is the first embodiment of the present invention, provides a fixture for milling artificial joints, which includes a machine tool body 1, a main body for precision machining of an artificial joint 7, a turntable 2 arranged on the machine tool body 1, which plays a role of connection and support, a motor 3 arranged on the machine tool body 1 for driving the turntable 2, which is used to drive the turntable 2 to rotate to cooperate with the machine tool body 1 in machining the artificial joint 7, a hydraulic rod 4 arranged on the motor 3, which is used for telescopic movement, a clamping unit 5 arranged on the driving end of the hydraulic rod 4, which is used to cooperate with the hydraulic rod 4 to clamp the artificial joint 7, and also includes a fitting unit 6 arranged on the clamping unit 5, which is used to cooperate with the clamping unit 5 to clamp the artificial joint 7 while keeping close contact with the contact surface of the artificial joint 7 to balance the force at the clamping point, and the fitting unit 6 includes a rotating device The connecting shaft 61 placed on the clamping unit 5 plays a connecting role. At the same time, when the contact position between the fitting unit 6 and the artificial joint 7 is in an inclined state, the fitting unit 6 is driven to tilt with the contact position as a whole, thereby increasing the contact area with the artificial joint 7 and improving the stability of the clamping and grasping. The connecting block 1 62 arranged on the connecting shaft 61 plays a connecting role. The abutment block 63 arranged on the connecting block 1 62 is used to contact the artificial joint 7. A soft material is provided on the side of the abutment block 63 that is in contact with the artificial joint 7 to prevent damage to the clamping position of the artificial joint 7. The fitting component 64 arranged on the connecting shaft 61 is used to adjust the deflection of the abutment block 63 to adapt to the irregular shape of the artificial joint 7, thereby increasing the clamping area of ​​the artificial joint 7 as much as possible, protecting the artificial joint 7 and improving the stability of the clamping. Two groups of hydraulic rods 4 are provided on the turntable 2. The driving directions of the two groups of hydraulic rods 4 are the same, and they are used to cooperate with the clamping unit 5 and the fitting unit 6 to clamp different positions of the artificial joint 7, thereby realizing segmented clamping. At the same time, when one group of hydraulic rods 4 drives the clamping unit 5 to clamp the artificial joint 7, the position of the artificial joint 7 is fixed. At this time, the other group of hydraulic rods 4 drives the clamping unit 5 to clamp other positions of the artificial joint 7, thereby improving the stability of the clamping. At the same time, through such placement, the clamping position of a single group of clamping units 5 can be changed, and the machine tool body 1 can realize the processing of the previously clamped position of the artificial joint 7 while keeping the position state of the artificial joint 7 unchanged. The artificial joint 7 is clamped in sections by the clamping units 5 on the two groups of hydraulic rods 4 , and the artificial joint 7 is further fitted with the fitting units 6 to maintain the stability of the clamped artificial joint 7 .

[0031] In summary, when the artificial joint 7 needs to be processed and adjusted, one of the hydraulic rods 4 is controlled to drive forward, and the artificial joint 7 is clamped by the clamping unit 5 on the corresponding hydraulic rod 4. At this time, the fitting unit 6 is adjusted to make the abutment block 63 fully fit with the artificial joint 7. At this time, the position of the artificial joint 7 is fixed. At this time, another group of hydraulic rods 4 is started to drive the clamping unit 5 and the fitting unit 6 above to clamp the artificial joint 7 again. Through such segmented clamping, the stability of the artificial joint 7 on the machine tool body 1 is further increased. At this time, the electric Machine 3 drives the entire fixture and the clamped artificial joint 7 to rotate through the turntable 2, which makes it convenient for the machine tool body 1 to process the artificial joint 7. At the same time, one group of clamping units 5 remains stationary, and the other group of clamping units 5 changes the clamping position, so that the machine tool body 1 can fully process all parts of the artificial joint 7. At the same time, the two groups of clamping units 5 adjust the clamping of different positions of the artificial joint 7, so that the position state of the artificial joint 7 can be freely changed, so that the artificial joint 7 can present various angles, which is convenient for the machine tool body 1 to perform precision processing on the artificial joint 7 with special shape.

[0032] Example 2, reference Figures 1-6 , which is the second embodiment of the present invention, differs from the previous embodiment in that: it provides a specific structure of the clamping unit 5 in the fixture for milling artificial joints. Compared with embodiment 1, the clamping unit 5 further includes a fixing component 51 provided on the driving end of the hydraulic rod 4, which plays a role of fixing and connecting, an adjusting component 52 provided on the fixing component 51, which is used to cooperate with the fixing component 51 to move up and down, and a clamping component 53 provided on the adjusting component 52, which is used to cooperate with the movement of the adjusting component 52 to approach the artificial joint 7 to be processed, clamp the artificial joint 7, and fix the position of the artificial joint 7.

[0033] Among them, the fixing component 51 includes a fixing block 511 arranged on the driving end of the hydraulic rod 4, which plays a fixing role, a sliding hole 512 arranged on the fixing block 511, which is used to adjust the component 52 to slide up and down, a rotating block 513 arranged on the fixing block 511, which is used to adjust the rotation, and a threaded hole 514 arranged on the rotating block 513 and connected to the sliding hole 512, which is used to cooperate with the rotating block 513 to adjust the position of the rotation adjustment component 52 on the fixed block 511.

[0034] Among them, the adjustment component 52 includes a screw 521 that is slidably set on the fixed block 511 and cooperates with the threaded hole 514, which is used to cooperate with the rotation of the threaded hole 514 to move up and down, a limiting groove 522 set on the screw 521 and cooperates with the sliding hole 512, which is used to cooperate with the sliding hole 512 to limit the movement trajectory of the screw 521 so that the screw 521 can only move up and down, and a fastening nut 523 set on the screw 521, which is used to cooperate with the rotating block 513 to fix the position of the screw 521 on the fixed block 511 to prevent the clamp from loosening during rotation.

[0035] Among them, the clamping assembly 53 includes a lifting block 531 arranged on the screw 1 521, which plays a connecting role and rotates the gear 532 arranged on the lifting block 531, and is used to rotate the screw 2 533 arranged at both ends of the gear 532 and coaxial with the gear 532. The two groups of screw 2 533 have opposite thread rotation directions and are used to cooperate with the gear 532 to rotate. The worm 534 arranged on the lifting block 531 for driving the gear 532 is used to adjust the rotation, drive the gear 532 to rotate, and thus drive the screw 2 533 to rotate, and the connecting sleeve 535 arranged on the screw 2 533 is used to move back and forth in cooperation with the rotation of the screw 2 533 to achieve clamping or loosening of the artificial joint 7.

[0036] The lifting block 531 is provided with a movable cavity 5311 that cooperates with the movement of the connecting sleeve 535 and is used to limit the movement of the connecting sleeve 535 so that the connecting sleeve 535 can only move back and forth in the movable cavity 5311 through the rotation of the screw 2 533; The connecting sleeve 535 is provided with a second threaded hole 5351 that matches the second screw rod 533 . The second screw rod 533 rotates through the second threaded hole 5351 to generate a pushing or pulling force on the connecting sleeve 535 , driving the connecting sleeve 535 to move back and forth in the movable cavity 5311 .

[0037] The rest of the structure is the same as that of Example 1.

[0038] In summary, when the artificial joint 7 needs to be clamped, the fastening nut 523 is rotated to move the fastening nut 523 away from the fixed block 511. At this time, the rotating block 513 is rotated to drive the screw 1 521 to move up and down on the fixed block 511 through the threaded hole 1 514, thereby driving the overall movement of the clamping assembly 53. When the clamping assembly 53 moves to the corresponding position, the worm 534 is rotated to drive the screw 2 533 to rotate through the gear 532, thereby driving the two sets of connecting sleeves 535 to open or close to clamp the artificial joint 7. At this time, the fitting unit 6 comes into contact with the artificial joint 7, and then cooperates with the clamping unit 5 to increase the clamping area with the artificial joint 7 to prevent uneven force on the clamped part of the artificial joint 7.

[0039] Example 3, reference Figures 1-10 This is the second embodiment of the present invention, which differs from the previous embodiment in that it provides a specific structure of a fitting assembly 64 in a fixture for milling an artificial joint. Compared to Example 2, fitting assembly 64 further includes a third screw 641 disposed on a connecting shaft 61 for rotating a second connecting block 642 disposed on the end of the third screw 641 to provide a connection, and a second rotating shaft 643 disposed on the second connecting block 642 for movably connecting the third screw 641 to the abutment block 63 via the second connecting block 642.

[0040] Among them, the connecting shaft 61 is provided with a rotating shaft 1 611 and a threaded hole 3 612 that cooperates with the screw 3 641. The rotating shaft 1 611 is used to movably connect the connecting shaft 61 and the connecting block 1 62. The threaded hole 3 612 is used to drive the screw 3 641 to move forward and backward when the screw 3 641 rotates, thereby pushing or pulling the abutment block 63 through the rotating shaft 2 643, controlling the deflection angle of the abutment block 63 to adapt to the shape of the artificial joint 7.

[0041] The connecting block 1 62 is provided with a movable groove 1 621 to match the connecting shaft 61 , and the movable groove 1 621 is provided with a connecting hole 1 622 to match the rotating shaft 1 611 . The movable groove 1 621 matches the rotating shaft 1 611 so that the connecting shaft 61 swings back and forth in the movable groove 1 621 .

[0042] Among them, the abutment block 63 is provided with a movable groove 2 631 that cooperates with the screw rod 3 641, and the inner wall of the connecting block 2 642 is provided with a connecting hole 2 632 that cooperates with the rotating shaft 2 643. The movable groove 2 631 cooperates with the rotating shaft 2 643, so that when the screw rod 3 641 pushes and pulls the abutment block 63, the connecting block 1 62 and the abutment block 63 use the rotating shaft 2 643 and the rotating shaft 1 611 as connection points respectively, and deflect to fit the shape of the artificial joint 7. At the same time, they cooperate with the connecting shaft 61 and the screw rod 3 641 to form a triangular support relationship, thereby maintaining the stability of the fit between the abutment block 63 and the artificial joint 7, thereby realizing protective clamping of the artificial joint 7.

[0043] The rest of the structure is the same as that of Example 2.

[0044] In summary, when the connecting sleeve 535 drives the fitting unit 6 to clamp the artificial joint 7, the abutment block 63 comes into contact with the artificial joint 7. When the contact position between the abutment block 63 and the artificial joint 7 is in an inclined state, the reaction force generated when the artificial joint 7 contacts the abutment block 63 drives the fitting unit 6 as a whole to deflect through the connecting shaft 61 to adapt to the contact surface between the abutment block 63 and the artificial joint 7. If the contact surface between the artificial joint 7 and the abutment block 63 is still an inclined surface relative to the abutment block 63, then Rotate screw three 641, screw three 641 pushes the abutment block 63 through shaft two 643. At this time, connecting block one 62 and abutment block 63 use shaft two 643 and shaft one 611 as connection points respectively, and deflect to fit the shape of artificial joint 7. At this time, shaft two 643 and shaft one 611 cooperate with connecting shaft 61 and screw three 641 to form a triangular support relationship, so that the abutment block 63 maintains this state, so that the contact surface of abutment block 63 and artificial joint 7 are stably fitted, and the position is stable for clamping the artificial joint 7.

[0045] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A fixture for milling an artificial joint, comprising a machine tool body (1), a turntable (2) arranged on the machine tool body (1), a motor (3) arranged on the machine tool body (1) for driving the turntable (2), a hydraulic rod (4) arranged on the motor (3), and a clamping unit (5) arranged on a driving end of the hydraulic rod (4), characterized in that: a laminating unit (6) disposed on the clamping unit (5), the laminating unit (6) comprising a connecting shaft (61) rotatably disposed on the connecting sleeve (535), a connecting block (62) disposed on the connecting shaft (61), an abutting block (63) disposed on the connecting block (62), and a laminating component (64) disposed on the connecting shaft (61); Two groups of hydraulic rods (4) are provided on the turntable (2), and the driving directions of the two groups of hydraulic rods (4) are the same; The artificial joint (7) is clamped in sections by the clamping units (5) on the two sets of hydraulic rods (4), and the artificial joint (7) is further fitted in cooperation with the fitting unit (6), thereby maintaining the stability of the clamped artificial joint (7).

2. The fixture for milling an artificial joint according to claim 1, characterized in that: The clamping unit (5) comprises a fixing assembly (51) arranged on the driving end of the hydraulic rod (4), an adjusting assembly (52) arranged on the fixing assembly (51), and a clamping assembly (53) arranged on the adjusting assembly (52).

3. The fixture for milling an artificial joint according to claim 2, characterized in that: The fixing assembly (51) includes a fixing block (511) provided on the driving end of the hydraulic rod (4), a sliding hole (512) provided on the fixing block (511), a rotating block (513) rotatably provided on the fixing block (511), and a threaded hole (514) provided on the rotating block (513) and communicating with the sliding hole (512).

4. The fixture for milling an artificial joint according to claim 3, characterized in that: The adjustment assembly (52) includes a screw rod (521) slidably disposed on the fixed block (511) and cooperating with the threaded hole (514), a limiting groove (522) disposed on the screw rod (521) and cooperating with the sliding hole (512), and a fastening nut (523) disposed on the screw rod (521).

5. The fixture for milling an artificial joint according to claim 4, characterized in that: The clamping assembly (53) includes a lifting block (531) provided on the screw rod (521), a gear (532) rotatably provided on the lifting block (531), a screw rod (533) provided at both ends of the gear rod (532) and coaxial with the gear rod (532), the two sets of screw rods (533) having opposite thread rotation directions, a worm (534) provided on the lifting block (531) for driving the gear rod (532), and a connecting sleeve (535) provided on the screw rod (533).

6. The fixture for milling an artificial joint according to claim 5, characterized in that: The lifting block (531) is provided with a movable cavity (5311) that cooperates with the movement of the connecting sleeve (535); The connecting sleeve (535) is provided with a second threaded hole (5351) that matches the second screw rod (533).

7. The fixture for milling an artificial joint according to claim 6, characterized in that: The fitting assembly (64) includes a screw rod 3 (641) arranged on the connecting shaft (61), a connecting block 2 (642) rotatably arranged on the end of the screw rod 3 (641), and a rotating shaft 2 (643) arranged on the connecting block 2 (642).

8. The fixture for milling an artificial joint according to claim 7, characterized in that: The connecting shaft (61) is provided with a rotating shaft 1 (611) and a threaded hole 3 (612) that matches the screw rod 3 (641).

9. The fixture for milling an artificial joint according to claim 8, characterized in that: The connecting block 1 (62) is provided with a movable groove 1 (621) matching the connecting shaft (61), and the movable groove 1 (621) is provided with a connecting hole 1 (622) matching the rotating shaft 1 (611).

10. The fixture for milling an artificial joint according to claim 9, characterized in that: The abutment block (63) is provided with a movable groove 2 (631) that matches the screw rod 3 (641), and the inner wall of the connection block 2 (642) is provided with a connection hole 2 (632) that matches the rotating shaft 2 (643).

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