A fixture for machining automobile gear VVT rotor cover

Abstract

The present invention relates to the technical field of rotor cover plate processing, and discloses a fixture for processing automobile gear VVT rotor cover plates, comprising a machine tool worktable, wherein a machining center tool is fixedly connected to the side of the machine tool worktable, a mounting plate is fixedly connected to the side of a supporting leg inside the machine tool worktable, an external fixing mechanism is fixedly connected to the top of the mounting plate, an internal fixing mechanism is fixedly connected to the top of the external fixing mechanism, a supporting mechanism is movably connected to the side of the mounting plate, and a support frame is fixedly connected to the top of the machine tool worktable, and a cover plate to be processed is placed on the top of the support frame; the hydraulic rod of the present invention drives the conical block to move downward through the connecting block, and the downward movement of the conical block causes the bending rod to rotate around the fixed axis, and after the bending rod rotates, it drives the upper arc block to move toward the cover plate to be processed, and the upper arc block moves the cover plate to be processed inward and presses it downward to fix it, automatically clamps and fixes the cover plate to be processed, improves the fixing speed, and avoids horizontal tilting of the cover plate.

Description

Technical Field

[0001] The present invention relates to the technical field of rotor cover plate processing, and more particularly to a fixture for processing a VVT rotor cover plate of an automobile gear. Background Art

[0002] VVT is the abbreviation of variable valve timing technology, which refers to the technology that optimizes combustion efficiency to improve power and fuel economy by adjusting the opening and closing time and angle of the engine's intake and exhaust valves. It usually controls the camshaft phase through hydraulic or solenoid valves to change the valve timing angle. The VVT ​​variable valve timing system is an indispensable part of the engine and is indispensable to the automotive industry.

[0003] The VVT ​​rotor cover is part of the VVT ​​phase actuator. Its main function is to seal and protect the internal mechanical components to ensure the normal operation of the hydraulic system. The VVT ​​rotor cover usually includes a stator, rotor, drive wheel, and cover. The stator is a torus with several compartments arranged around its inner wall. The rotor consists of a cylindrical portion and a wheel shaft portion located at one end of the cylindrical portion. The outer wall of the cylindrical portion is provided with several blades, which rotate in different compartments in a one-to-one manner. The drive wheel and cover are located at both ends of the stator.

[0004] When processing the current VVT rotor cover, it is necessary to process the center and the surrounding areas of the rotor cover. Therefore, when processing the center, it is necessary to fix it on the outside. When fixing the cover, since the surface of the cover is circular, the current fixing method is generally to position it manually. After the cover is fixed, the changed surface needs to be measured to avoid it from tilting.

[0005] After the outer side of the rotor cover is fixed, after the center processing is completed, if the outer side processing is carried out, the fixing fixture will hinder the processing tool, so the fixture needs to be disassembled and clamped again. Repeated clamping work will affect the overall processing efficiency. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a fixture for machining a VVT rotor cover plate of an automobile gear, so as to solve the technical problems raised in the background art.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a fixture for processing a VVT rotor cover plate of an automobile gear, comprising a machine tool worktable, the side surface of the machine tool worktable is fixedly connected to a machining center tool, the side surface of the inner support leg of the machine tool worktable is fixedly connected to a mounting plate, the top end of the mounting plate is fixedly connected to an external fixing mechanism, the top end of the external fixing mechanism is fixedly connected to an internal fixing mechanism, the side surface of the mounting plate is movably connected to a supporting mechanism, the top end of the machine tool worktable is fixedly connected to a supporting frame, and the top end of the supporting frame is placed on the cover plate to be processed; the external fixing mechanism includes a servo hydraulic that can provide power, the top end of the servo hydraulic is fixedly connected to a hydraulic rod, the top end of the hydraulic rod is fixedly connected to a connecting block, the top end of the connecting block is fixedly connected to a conical block, the four sides of the connecting block are movably connected to lower arc blocks, the top end of the lower arc block is fixedly connected to a bending rod, and the top end of the bending rod close to the side surface of the cover plate to be processed is fixedly connected to an upper arc block.

[0008] In a preferred embodiment, the central axis of the support frame coincides with the central axis of the external fixing mechanism, the bottom end of the support mechanism is fixedly connected to the top end of the machine tool worktable, and the external fixing mechanism is located on one side of the top end of the machine tool worktable.

[0009] In a preferred embodiment, the middle part of the bending rod is movably connected to a fixed shaft, the bottom end of the fixed shaft is fixedly connected to a fixed plate, the bottom end of the fixed plate is fixedly connected to the top end of the support mechanism, and the inside of the top end of the conical block is fixedly connected to the internal fixing mechanism.

[0010] In a preferred embodiment, the conical block is an inverted quadrangular pyramid, the side of the lower arc block is always in contact with the connecting block and the side of the conical block, the servo hydraulics can control the hydraulic rod to move in the vertical direction, and the internal fixing mechanism is located at the center of the top of the conical block.

[0011] In a preferred embodiment, the internal fixing mechanism includes a servo motor located in the conical block and fixedly connected to the conical block, the top of the servo motor is fixedly connected to a threaded rod, the side of the threaded rod is threadedly connected to a movable plate, the tops of the four sides of the movable plate are movably connected to support plates, the sides of the support plates are movably connected to rotating plates, the top of the rotating plate close to the side of the support plate is movably connected to an epitaxial block, and the side of the epitaxial block away from the rotating plate is fixedly connected to a top plate.

[0012] In a preferred embodiment, the bottom end of the top plate is movably connected to the top end of the threaded rod, the dead corners of the bottom end of the top plate are fixedly connected to a fixed rod, the side of the fixed rod is movably connected to the inner side of the movable plate, and the bottom end of the fixed rod is fixedly connected to the top end of the servo motor.

[0013] In a preferred embodiment, the bottom end of the rotating plate is fixedly connected to a connecting rod, and the bottom end of the connecting rod is fixedly connected to a fixing ball. When the fixing ball moves close to the threaded rod, the distance between the outer sides of the two fixing balls on a straight line is less than the diameter of the central through hole of the cover plate to be processed.

[0014] In a preferred embodiment, the support mechanism includes a fixed frame that can be fixed, the fixed frame is internally movably connected to a sliding block, the sliding block is internally movably connected to a limiting rod, the side of the sliding block close to the bending rod is fixedly connected to a support block, the side of the limiting rod is sleeved with a support spring, and the support spring is located on the side of the sliding block away from the support block.

[0015] Technical effects and advantages of the present invention:

[0016] 1. The present invention is provided with a conical block, a bending rod and an upper arc block. When the servo hydraulic pressure is activated, the hydraulic rod moves downward, and the hydraulic rod drives the conical block downward through the connecting block. The downward movement of the conical block causes the bending rod to rotate around the fixed axis. After the bending rod rotates, it drives the upper arc block to move toward the cover plate to be processed. The upper arc block moves the cover plate to be processed inward and presses it downward to fix it, automatically clamping and fixing the cover plate to be processed, improving the fixing speed and preventing the cover plate from tilting horizontally.

[0017] 2. The present invention is provided with a conical block, a movable plate and a support plate. After the inner part of the cover plate to be processed is processed, the conical block moves upward. After the conical block moves upward, the fixed ball is located above the cover plate to be processed. The servo motor is started to drive the threaded rod to rotate. The threaded rod rotates to move the movable plate upward. The movable plate drives the support plate to move upward, so that the fixed ball opens outward and is located inside the sink of the cover plate to be processed. The conical block moves downward, thereby fixing the center of the cover plate to be processed, making it easier to process the outer side of the cover plate to be processed.

[0018] 3. The present invention is provided with a support spring, a sliding block and a support block. When the outer side of the cover plate to be processed is processed, the side surface of the lower arc block contacts the side surface of the connecting block. At this time, the support spring will apply elastic force to the sliding block. The sliding block to which the elastic force is applied maintains the contact state between the support block and the connecting block, thereby making the upper arc block above stay away from the cover plate to be processed. At this time, it can avoid the machining center tool from accidentally colliding with the upper arc block when processing the cover plate to be processed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the overall decomposition structure of the present invention.

[0021] Figure 3Schematic diagram of the external fixation mechanism of the present invention.

[0022] Figure 4 It is a schematic diagram of the exploded structure of the external fixation mechanism of the present invention.

[0023] Figure 5 Schematic diagram of the internal fixation mechanism of the present invention.

[0024] Figure 6 It is a schematic diagram of the connection structure between the internal fixation mechanism and the tapered block of the present invention.

[0025] Figure 7 Schematic diagram of the exploded structure of the internal fixation mechanism of the present invention.

[0026] Figure 8 It is a schematic diagram of the support mechanism structure of the present invention.

[0027] The accompanying drawings are marked as follows: 1. Machine tool worktable; 2. Machining center tool; 3. Mounting plate; 4. External fixing mechanism; 401. Servo hydraulics; 402. Hydraulic rod; 403. Connecting block; 404. Conical block; 405. Lower arc block; 406. Bending rod; 407. Upper arc block; 408. Fixed shaft; 409. Fixed plate; 5. Internal fixing mechanism; 501. Servo motor; 502. Threaded rod; 503. Top plate; 504. Fixed rod; 505. Moving plate; 506. Extension block; 507. Rotating plate; 508. Connecting rod; 509. Fixed ball; 510. Support plate; 6. Support mechanism; 601. Fixed frame; 602. Sliding block; 603. Limiting rod; 604. Support spring; 605. Support block; 7. Support frame; 8. Processing cover plate. DETAILED DESCRIPTION

[0028] The technical solutions of the present invention will be described clearly and completely below in conjunction with the drawings in the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples. The fixture for processing the automotive gear VVT rotor cover plate involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] Reference Figure 1 and Figure 2The present invention provides a fixture for processing automobile gear VVT rotor cover plates, comprising a machine tool worktable 1, a machining center tool 2 is fixedly connected to the side of the machine tool worktable 1, a mounting plate 3 is fixedly connected to the side of the inner support leg of the machine tool worktable 1, the top of the mounting plate 3 is fixedly connected to an external fixing mechanism 4, the top of the external fixing mechanism 4 is fixedly connected to an internal fixing mechanism 5, the side of the mounting plate 3 is movably connected to a supporting mechanism 6, the top of the machine tool worktable 1 is fixedly connected to a supporting frame 7, a cover plate 8 to be processed is placed on the top of the supporting frame 7, the central axis of the supporting frame 7 coincides with the central axis of the external fixing mechanism 4, the bottom end of the supporting mechanism 6 is fixedly connected to the top of the machine tool worktable 1, and the external fixing mechanism 4 is located on one side of the top of the machine tool worktable 1.

[0030] In the embodiment of the present application, the external fixing mechanism 4 is located on one side of the top of the machine tool worktable 1, so the external fixing mechanism 4 performs clamping work on one side of the machine tool worktable 1, and the other side of the machine tool worktable 1 can perform other processing work, making the present application more flexible when used. The support frame 7 coincides with the central axis of the external fixing mechanism 4, and the two match each other, which is convenient for clamping the cover plate 8 to be processed. The top of the mounting plate 3 is fixedly connected to the external fixing mechanism 4, and the mounting plate 3 can support the external fixing mechanism 4 to ensure the stability of the external fixing mechanism 4 when working.

[0031] Reference Figure 3 and Figure 4 The external fixing mechanism 4 includes a servo hydraulic 401 that can provide power. The top of the servo hydraulic 401 is fixedly connected to a hydraulic rod 402. The top of the hydraulic rod 402 is fixedly connected to a connecting block 403. The top of the connecting block 403 is fixedly connected to a conical block 404. The four sides of the connecting block 403 are movably connected to a lower arc block 405. The top of the lower arc block 405 is fixedly connected to a bending rod 406. The top of the bending rod 406 close to the side of the cover plate 8 to be processed is fixedly connected to an upper arc block 407. The middle of the bending rod 406 A fixed shaft 408 is movably connected, and the bottom end of the fixed shaft 408 is fixedly connected to a fixed plate 409. The bottom end of the fixed plate 409 is fixedly connected to the top of the support mechanism 6. The inside of the top of the conical block 404 is fixedly connected to the internal fixing mechanism 5. The conical block 404 is an inverted quadrangular pyramid. The side of the lower arc block 405 is always in contact with the connecting block 403 and the side of the conical block 404. The servo hydraulics 401 can control the hydraulic rod 402 to move in the vertical direction. The internal fixing mechanism 5 is located at the center of the top of the conical block 404.

[0032] In the embodiment of the present application, after the hydraulic rod 402 moves downward, the conical block 404 will move downward. When the conical block 404 moves downward, the lower arc block 405 changes from contact with the connecting block 403 to contact with the side of the conical block 404. At this time, the lower arc block 405 drives the bending rod 406 to rotate around the fixed axis 408. After rotation, the upper arc block 407 above the bending rod 406 approaches the cover plate 8 to be processed, and finally the side of the bending rod 406 limits the side of the cover plate 8 to be processed, and the upper arc block 407 presses down on the top of the cover plate 8 to be processed. The four bending rods 406 automatically move the cover plate 8 to be processed to the center position of the support frame 7 and automatically fix the outside of the cover plate 8 to be processed. At this time, the center of the cover plate 8 to be processed can be processed, and positioning and clamping can be automatically performed.

[0033] Reference Figure 5 、 Figure 6 as well as Figure 7 The internal fixing mechanism 5 includes a servo motor 501 located in and fixedly connected to the conical block 404. The top of the servo motor 501 is fixedly connected to a threaded rod 502. The side of the threaded rod 502 is threadedly connected to a movable plate 505. The tops of the four sides of the movable plate 505 are movably connected to support plates 510. The side of the support plate 510 is movably connected to a rotating plate 507. The top of the rotating plate 507 close to the side of the support plate 510 is movably connected to an extension block 506. The side of the extension block 506 away from the rotating plate 507 is fixedly connected to the top plate 503. The bottom end of the top plate 503 is movably connected to the top of the threaded rod 502, and the dead corners of the bottom end of the top plate 503 are fixedly connected to the fixed rod 504. The side of the fixed rod 504 is movably connected to the inner side of the movable plate 505. The bottom end of the fixed rod 504 is fixedly connected to the top of the servo motor 501. The bottom end of the rotating plate 507 is fixedly connected to the connecting rod 508, and the bottom end of the connecting rod 508 is fixedly connected to the fixed ball 509. When the fixed ball 509 moves close to the threaded rod 502, the distance between the outer sides of the two fixed balls 509 on the straight line is less than the diameter of the central through hole of the cover plate 8 to be processed.

[0034] In the embodiment of the present application, when the servo motor 501 drives the threaded rod 502 to rotate, the movable plate 505 moves upward, and when the movable plate 505 moves upward, the support plate 510 moves upward, and when the support plate 510 moves upward, the rotating plate 507 rotates upward around the extension block 506. When the rotating plate 507 rotates upward, the rotating plate 507 drives the fixed ball 509 to rotate upward through the connecting rod 508. At this time, the fixed ball 509 opens outward, and the extension block 506 and the rotating plate 507, the rotating plate 507 and the support plate 510, and the support plate 510 and the movable plate 505 are all connected by a rotating shaft to ensure that they can rotate. The side of the fixed ball 509 contacts the side of the inner side of the sink of the cover plate 8 to be processed, so that the cover plate 8 to be processed is positioned. The servo motor 501 stops, and the conical block 404 moves downward to fix the cover plate 8 to be processed. The conical block 404 remains paused, thereby fixing the cover plate 8 to be processed. At this time, it is convenient to process the outside of the cover plate 8 to be processed. Therefore, when the center and the outside of the cover plate 8 to be processed are processed, the present application can automatically clamp and fix them respectively, with a high degree of automation and more precise processing.

[0035] Reference Figure 4 have Figure 8 The support mechanism 6 includes a fixed frame 601 that can be fixed, and the internal movably connected to the fixed frame 601 is a sliding block 602, and the internal movably connected to the sliding block 602 is a limiting rod 603. The side of the sliding block 602 close to the bending rod 406 is fixedly connected to the support block 605, and the side of the limiting rod 603 is sleeved with a support spring 604, and the support spring 604 is located on the side of the sliding block 602 away from the support block 605.

[0036] In the embodiment of the present application, when the lower part of the bending rod 406 moves close to the support block 605, the support block 605 will move toward the inside of the fixed frame 601. When the support block 605 moves, it will drive the sliding block 602 to move and compress the support spring 604. When the conical block 404 moves away from the side of the lower arc block 405, the side of the connecting block 403 contacts the side of the lower arc block 405, so the compressed support spring 604 will be reset, so that the support block 605 remains in contact with the bending rod 406, and then the upper part of the upper arc block 407 is away from the cover plate 8 to be processed, thereby avoiding the machining center tool 2 from accidentally colliding with the upper arc block 407 when processing the cover plate 8 to be processed, making the overall processing process of the present application safer.

[0037] The working principle of the present invention is as follows: when the cover plate 8 to be processed needs to be processed, the unprocessed cover plate 8 to be processed is placed above the support frame 7. After placement, the servo hydraulics 401 is started and drives the hydraulic rod 402 to move downward. When the hydraulic rod 402 moves downward, it drives the conical block 404 to move downward through the connecting block 403. When the conical block 404 moves downward, the lower arc block 405 changes from contact with the connecting block 403 to contact with the side of the conical block 404. At this time, the lower arc block 405 drives the bending rod 406 to rotate around the fixed axis 408. After rotation, the upper arc block 407 above the bending rod 406 approaches the cover plate 8 to be processed, and finally the side of the bending rod 406 is limited to the side of the cover plate 8 to be processed, and the upper arc block 407 presses down on the top of the cover plate 8 to be processed. The four bending rods 406 automatically move the cover plate 8 to be processed to the center position of the support frame 7, and the four upper arc blocks 407 can stably press down the cover plate 8 to be processed.

[0038] When the upper arc block 407 presses down the cover plate 8 to be processed, the machining center tool 2 processes the through hole and the sink on the inner side of the cover plate 8 to be processed. When the upper arc block 407 moves close to the cover plate 8 to be processed, the lower side of the bent rod 406 moves close to the support block 605, which causes the support block 605 to move toward the inside of the fixed frame 601. When the support block 605 moves, it drives the sliding block 602 to move and compresses the support spring 604.

[0039] After the inner portion of the cover plate 8 to be processed is processed, the servo hydraulics 401 drives the hydraulic rod 402 to move upward. When the hydraulic rod 402 moves upward, it drives the conical block 404 to move upward through the connecting block 403. At this time, the conical block 404 moves away from the side of the lower arc block 405. The side of the connecting block 403 contacts the side of the lower arc block 405. Therefore, the compressed support spring 604 will reset, so that the support block 605 maintains the contact state with the bending rod 406, thereby making the upper part of the upper arc block 407 away from the cover plate 8 to be processed;

[0040] When the conical block 404 moves upward, it drives the internal fixing mechanism 5 to move upward as a whole. At this time, the fixing ball 509 will move to the top of the sinking platform of the cover plate 8 to be processed. When the fixing ball 509 moves to the top of the cover plate 8 to be processed, the servo motor 501 is started. When the servo motor 501 is started, it drives the threaded rod 502 to rotate. When the threaded rod 502 rotates, the moving plate 505 moves upward. When the moving plate 505 moves upward, it drives the support plate 510 to move upward. When the support plate 510 moves upward, the rotating plate 507 rotates upward around the epitaxial block 506. When the rotating plate 507 rotates upward, the rotating plate 507 rotates upward. The plate 507 drives the fixing ball 509 to rotate upwards through the connecting rod 508. At this time, the fixing ball 509 opens outwards and is located in the sink of the cover plate 8 to be processed. The conical block 404 moves downwards, causing the fixing ball 509 to move downwards, and the side of the fixing ball 509 contacts the side of the inner part of the sink of the cover plate 8 to be processed, thereby positioning the cover plate 8 to be processed. The servo motor 501 stops, and the conical block 404 moves downwards to fix the cover plate 8 to be processed. The conical block 404 remains paused, thereby fixing the cover plate 8 to be processed. At this time, it is convenient to process the outer side of the cover plate 8 to be processed.

[0041] After the cover plate 8 to be processed is processed, the servo hydraulics 401 directly controls the conical block 404 to move upward. At this time, the conical block 404 will move the cover plate 8 to be processed upward. At this time, the servo motor 501 controls the threaded rod 502 to reverse, so that the fixed ball 509 shrinks inward, thereby loosening the cover plate 8 to be processed. After loosening, the fixed ball 509 shrinks to the inside of the support frame 7, and the servo hydraulics 401 drives the fixed ball 509 to move to the bottom of the support frame 7. At this time, the next cover plate 8 to be processed is processed.

[0042] Finally: The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fixture for machining a VVT rotor cover plate of an automobile gear, comprising a machine tool workbench (1), characterized in that: The side of the machine tool workbench (1) is fixedly connected to a machining center tool (2), the side of the inner support leg of the machine tool workbench (1) is fixedly connected to a mounting plate (3), the top of the mounting plate (3) is fixedly connected to an external fixing mechanism (4), the top of the external fixing mechanism (4) is fixedly connected to an internal fixing mechanism (5), the side of the mounting plate (3) is movably connected to a supporting mechanism (6), the top of the machine tool workbench (1) is fixedly connected to a supporting frame (7), and a cover plate (8) to be processed is placed on the top of the supporting frame (7); the external fixing mechanism (4) includes a movable A servo hydraulic system (401) provides power, wherein the top of the servo hydraulic system (401) is fixedly connected to a hydraulic rod (402), the top of the hydraulic rod (402) is fixedly connected to a connecting block (403), the top of the connecting block (403) is fixedly connected to a conical block (404), the four sides of the connecting block (403) are movably connected to lower arc blocks (405), the top of the lower arc block (405) is fixedly connected to a bending rod (406), and the top of the bending rod (406) close to the side of the cover plate (8) to be processed is fixedly connected to an upper arc block (407); The internal fixing mechanism (5) includes a servo motor (501) located in the conical block (404) and fixedly connected to the conical block (404); the top of the servo motor (501) is fixedly connected to a threaded rod (502); the side of the threaded rod (502) is threadedly connected to a movable plate (505); the tops of the four sides of the movable plate (505) are movably connected to support plates (510); the side of the support plate (510) is movably connected to a rotating plate (507); the top of the rotating plate (507) close to the side of the support plate (510) is movably connected to an extension block (506); the side of the extension block (506) away from the rotating plate (507) is fixedly connected to a top plate (503); The bottom end of the top plate (503) is movably connected to the top end of the threaded rod (502), the dead corners of the bottom end of the top plate (503) are fixedly connected to fixed rods (504), the side surfaces of the fixed rods (504) are movably connected to the inner side of the movable plate (505), and the bottom end of the fixed rods (504) is fixedly connected to the top end of the servo motor (501); The bottom end of the rotating plate (507) is fixedly connected to a connecting rod (508), and the bottom end of the connecting rod (508) is fixedly connected to a fixing ball (509), and when the fixing ball (509) moves close to the threaded rod (502), the distance between the outer sides of two fixing balls (509) on a straight line is smaller than the diameter of the central through hole of the cover plate (8) to be processed; The support mechanism (6) comprises a fixed frame (601) that can be fixed, a sliding block (602) being movably connected to the interior of the fixed frame (601), a limiting rod (603) being movably connected to the interior of the sliding block (602), a supporting block (605) being fixedly connected to the side of the sliding block (602) close to the bending rod (406), a supporting spring (604) being sleeved on the side of the limiting rod (603), and the supporting spring (604) being located on the side of the sliding block (602) away from the supporting block (605).

2. The fixture for machining the VVT ​​rotor cover of an automobile gear according to claim 1, characterized in that: The support frame (7) coincides with the central axis of the external fixing mechanism (4), the bottom end of the support mechanism (6) is fixedly connected to the top end of the machine tool workbench (1), and the external fixing mechanism (4) is located on one side of the top end of the machine tool workbench (1).

3. The fixture for machining the VVT ​​rotor cover of an automobile gear according to claim 1, characterized in that: The middle of the bending rod (406) is movably connected to a fixed shaft (408), the bottom end of the fixed shaft (408) is fixedly connected to a fixed plate (409), the bottom end of the fixed plate (409) is fixedly connected to the top end of the support mechanism (6), and the interior of the top end of the conical block (404) is fixedly connected to the internal fixing mechanism (5).

4. The fixture for machining the VVT ​​rotor cover of an automobile gear according to claim 3, characterized in that: The conical block (404) is in the shape of an inverted quadrangular pyramid. The side surface of the lower arc block (405) is always in contact with the side surface of the connecting block (403) and the conical block (404). The servo hydraulics (401) can control the hydraulic rod (402) to move in the vertical direction. The internal fixing mechanism (5) is located at the center of the top end of the conical block (404).

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