Fixture for mounting base processing

Abstract

This application relates to a fixture for machining a mounting base, belonging to the field of jewelry processing technology. It includes a base, positioning beads, a mounting seat, positioning posts, and a drive mechanism. The base is mounted on a machining center and has positioning holes. Multiple sliding grooves are formed on the sidewall of the positioning hole, communicating with it. One positioning bead slides within each groove. The mounting seat is mounted on the machining base, and the positioning posts are mounted on the mounting seat. The positioning posts have annular grooves for the positioning beads to engage. The drive mechanism is mounted on the base and drives the positioning beads to slide from the sliding grooves into the annular grooves. The operator moves the mounting seat so that the positioning post is inserted into the positioning hole. Then, the drive mechanism drives the positioning beads to slide from the sliding grooves into the annular grooves, allowing the multiple positioning beads to abut against the positioning posts, thereby fixing the positioning posts within the positioning holes. This completes the positioning and installation of the machining base on the machining center, effectively improving the convenience of installing the machining base.

Description

Technical Field

[0001] This application relates to the field of jewelry processing technology, and in particular to a fixture for processing mounting bases. Background Technology

[0002] When processing gold jewelry, it is necessary to process a groove on the processing base that matches the style of the gold jewelry, and then the gold jewelry of the desired style can be processed through the groove.

[0003] Currently, existing processing bases are generally fixed directly inside the processing center. When fixing the processing base, it is necessary to measure the position of the processing base, and then fix the processing base with a clamp, so that gold jewelry can be processed.

[0004] However, gold jewelry comes in a variety of styles, and different styles of processing bases are required to process different styles of gold jewelry. Each time a different processing base is changed, the position of the processing base needs to be measured in order to fix it and process it, which is quite cumbersome. Summary of the Invention

[0005] To improve the ease of installing and processing bases, this application provides a fixture for processing bases.

[0006] The technical solution provided in this application for a fixture for machining mounting bases is as follows: A fixture for machining a mounting base includes a base, positioning beads, a mounting seat, a positioning post, and a drive mechanism. The base is mounted on a machining center and has a positioning hole. Multiple sliding grooves are formed on the sidewall of the positioning hole, communicating with it. One positioning bead is slidably disposed within one of the sliding grooves. The mounting seat is mounted on the machining base, and the positioning post is mounted on the mounting seat. An annular groove is formed on the positioning post for the positioning bead to engage. The drive mechanism is mounted on the base and is used to drive the positioning bead to slide from the sliding groove into the annular groove.

[0007] By adopting the above technical solution, the staff first positions and installs the base on the machining center, then installs the mounting seat on the machining base to be processed, and then moves the mounting seat so that the positioning pin is inserted into the positioning hole. At this time, the annular groove and the sliding groove are connected. The staff drives the positioning ball from the sliding groove to the annular groove through the drive mechanism. Multiple positioning balls can then abut against the positioning pin respectively, thereby fixing the positioning pin in the positioning hole, completing the positioning and installation of the machining base on the machining center. This eliminates the process of measuring the machining base when installing it, effectively improving the convenience of installing the machining base.

[0008] Optionally, the drive mechanism includes an outer disk and a handle. The outer disk is rotatably mounted on a base. Multiple arc-shaped slots are eccentrically opened on the outer disk. One of the positioning beads is slidably mounted in one of the arc-shaped slots. The handle is mounted on the outer disk.

[0009] By adopting the above technical solution, the operator can rotate the handle, which in turn drives the outer disc to rotate, thereby causing the positioning bead to slide in the eccentrically opened arc-shaped slot. This allows the positioning bead to move towards the positioning post in the slide groove and get into the ring groove, effectively improving the convenience for the operator to move the positioning bead in the slide groove.

[0010] Optionally, the base is provided with a plurality of positioning blocks, and the mounting base is provided with a plurality of positioning slots for the positioning blocks to be engaged.

[0011] By adopting the above technical solution, when the worker moves the mounting base so that the positioning pin is inserted into the positioning hole, multiple positioning blocks are respectively locked into the corresponding positioning slots to position the mounting base, thereby improving the stability of the mounting base and thus improving the stability of the processing base.

[0012] Optionally, multiple positioning blocks are slidably disposed on a base toward the center of the positioning hole, and the base is provided with a sliding mechanism for driving the positioning blocks to slide.

[0013] By adopting the above technical solution, after multiple positioning blocks are inserted into their corresponding positioning slots, the staff can use a sliding mechanism to drive the positioning blocks to slide on the base toward the positioning post. The multiple positioning blocks can then be pressed against the positioning post to further position the positioning post and improve the stability of the positioning post in the positioning hole.

[0014] Optionally, the sliding mechanism includes a screw, a turntable, and a linkage assembly. The screw is rotatably mounted on a positioning block, and the turntable is coaxially mounted on the screw. The linkage assembly is mounted on the turntable and is used to drive the turntable to rotate.

[0015] By adopting the above technical solution, the operator can drive the turntable to rotate through the linkage component, which in turn drives the screw to rotate. The screw then allows the positioning block to slide on the base, improving the convenience for the operator to drive the positioning block to slide on the base.

[0016] Optionally, the linkage component includes a pull rope and a torsion spring. The pull rope is wound around a turntable and connected to a handle. The torsion spring is mounted on a base and connected to the turntable.

[0017] By adopting the above technical solution, when the operator rotates the handle, the handle can pull the rope, which in turn drives the turntable to rotate, effectively improving the convenience of the operator in driving the turntable to rotate; when the operator rotates the handle in the opposite direction, the handle releases the pull on the rope, and the torsion spring can drive the turntable to rotate in reverse, so that the positioning block releases the clamping against the positioning post, and the rope is rewound onto the turntable.

[0018] Optionally, the base is provided with multiple guide tubes, and one of the pull ropes is threaded through one of the guide tubes.

[0019] By adopting the above technical solution, the guide tube provides guidance for the movement of the pull rope, making the movement of the pull rope more stable when pulled by the handle.

[0020] Optionally, the base is provided with a limiting mechanism for restricting the rotation direction of the outer disk. The limiting mechanism includes a ratchet, a pawl, a spring, and a pushing assembly. The ratchet is coaxially disposed on the outer disk, the pawl is hinged to the base, the spring is disposed on the base, and the spring is connected to the pawl. The pushing assembly is disposed on the base and is used to drive the pawl away from the ratchet.

[0021] By adopting the above technical solution, when the operator rotates the handle to drive the outer disc in the direction that drives the positioning bead to engage with the ring groove, the outer disc drives the ratchet to rotate. The ratchet can disengage the pawl, allowing the ratchet to rotate normally. When the outer disc rotates to the point where the positioning bead is pressed against the ring groove, the spring drives the pawl to press against the ratchet, restricting the outer disc from rotating in the direction that drives the positioning bead away from the positioning post. This ensures that the positioning bead is stably pressed against the ring groove, improving the stability of the positioning bead when it is pressed against the positioning post. When it is necessary to release the positioning post, the operator pushes the component to drive the pawl away from the ratchet, at which point the outer disc can be driven to rotate in the direction that drives the positioning bead away from the positioning post.

[0022] Optionally, the pushing assembly includes a cam, a connecting rod, a worm gear, and a worm. The cam is rotatably mounted on the base and abuts against a pawl. The connecting rod is mounted on the cam. The worm gear is coaxially mounted on the connecting rod. The worm rotatably passes through the base and meshes with the worm gear.

[0023] By adopting the above technical solution, the operator rotates the worm gear, which drives the worm wheel to rotate. The worm wheel then drives the connecting rod to rotate, which in turn drives the cam to rotate. The cam then pushes the pawl away from the ratchet, releasing the restriction on the rotation direction of the ratchet. The operator can then rotate the worm gear in the opposite direction to make the pawl engage with the ratchet, effectively improving the operator's convenience in controlling whether the pawl engages with the ratchet.

[0024] Optionally, a guide groove is provided on the top wall of the slide, and the positioning bead is slidably disposed in the guide groove.

[0025] By adopting the above technical solution, the guide groove guides the positioning bead, improving the stability of the positioning column when it slides in the groove.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. Multiple positioning beads can be abutted against the positioning pins respectively, thereby fixing the positioning pins in the positioning holes, completing the positioning and installation of the machining base on the machining center, eliminating the need for workers to measure the machining base during installation, and effectively improving the convenience of installing the machining base; 2. After multiple positioning blocks are inserted into their corresponding positioning slots, the operator drives the positioning blocks to slide on the base toward the positioning post through a sliding mechanism. The multiple positioning blocks can then press against the positioning post to further position the positioning post. 3. When the outer disk rotates to the point where the positioning ball is pressed against the ring groove, the spring drives the pawl to press against the ratchet, restricting the outer disk from rotating in the direction that drives the positioning ball away from the positioning post, so that the positioning ball can be stably pressed against the ring groove, improving the stability of the positioning ball when it is pressed against the positioning post. Attached Figure Description

[0027] Figure 1 This is an exploded view of the base and mounting seat of the fixture for machining the mounting base according to an embodiment of this application.

[0028] Figure 2 This is a schematic diagram of the connection structure between the base and the positioning column in an embodiment of this application.

[0029] Figure 3 This is a schematic diagram of the mounting base and positioning column according to an embodiment of this application.

[0030] Figure 4 This is a schematic diagram of the drive mechanism and the limiting mechanism in an embodiment of this application.

[0031] Figure 5 This is a partial cross-sectional view of the base according to an embodiment of this application.

[0032] Figure 6 This is a structural schematic diagram of the base from another perspective of an embodiment of this application.

[0033] Figure 7 yes Figure 6 An enlarged schematic diagram of part A in the middle.

[0034] Reference numerals: 1. Base; 11. Positioning hole; 12. Slide groove; 13. Guide groove; 2. Positioning bead; 3. Mounting seat; 31. Positioning groove; 4. Positioning pin; 41. Annular groove; 5. Drive mechanism; 51. Outer disc; 511. Arc-shaped slot; 52. Handle; 6. Positioning block; 7. Sliding mechanism; 71. Screw; 72. Turntable; 73. Linkage assembly; 731. Pull rope; 732. Torsion spring; 8. Guide tube; 9. Limiting mechanism; 91. Ratchet; 92. Pad; 93. Spring; 94. Push assembly; 941. Cam; 942. Connecting rod; 943. Worm gear; 944. Worm; 10. Support block. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0036] This application discloses a fixture for machining mounting bases.

[0037] Reference Figure 1 The fixture for processing the mounting base includes a base 1, a positioning bead 2, a mounting seat 3, a positioning column 4, a drive mechanism 5, a positioning block 6, a sliding mechanism 7, and a limiting mechanism 9.

[0038] Reference Figure 1 , Figure 2 The base 1 is mounted on the machining center. In this embodiment, the base 1 also includes a mounting plate connected to the bottom of the base 1 by bolts. Space is left between the base 1 and the mounting plate for the installation of other components. The mounting plate is positioned on the machining center by bolts. The base 1 has a positioning hole 11. Multiple sliding grooves 12 are formed on the side wall of the positioning hole 11 and communicate with the positioning hole 11. In this embodiment, four sliding grooves 12 are formed circumferentially on the side wall of the positioning hole 11. One positioning bead 2 is slidably installed in one sliding groove 12. The diameter of the positioning bead 2 is the same as the width of the sliding groove 12. A guide groove 13 is formed on the top wall of the sliding groove 12 along the length of the sliding groove 12. The positioning bead 2 slides in the guide groove 13, which improves the stability of the positioning bead 2 when sliding in the sliding groove 12. In this embodiment, the end of the guide groove 13 near the center of the positioning hole 11 is not connected to the positioning hole 11, so that the guide groove 13 can limit the range in which the positioning bead 2 can slide out of the sliding groove 12 and prevent the positioning bead 2 from sliding out of the sliding groove 12 completely.

[0039] Reference Figure 3 , Figure 4The mounting base 3 is detachably mounted on the processing base to be processed by bolts. In this embodiment, a threaded sleeve is installed at the bottom of the mounting base 3, and the positioning pin 4 is threaded through the threaded sleeve, which facilitates the installation and removal of the positioning pin 4 by the operator. The positioning pin 4 has an annular groove 41 circumferentially opened. When the positioning pin 4 is inserted into the positioning hole 11, the annular groove 41 is connected to the slide groove 12. The driving mechanism 5 is installed on the base 1. The driving mechanism 5 is used to drive the positioning bead 2 to slide from the slide groove 12 into the annular groove 41. The driving mechanism 5 includes an outer plate 51 and a handle 52. The outer plate 51 is rotatably mounted on the bottom of the base 1 by a rotating shaft. Four arc-shaped slots 511 are eccentrically opened on the outer plate 51. One positioning bead 2 slides in one arc-shaped slot 511. The handle 52 is detachably mounted on the outer plate 51 by bolts. In this embodiment, a rubber anti-slip sleeve is installed on the handle 52. The rubber anti-slip sleeve increases the friction between the operator's hand and the handle 52 and improves the comfort of the operator when holding the handle 52.

[0040] The operator first installs the base 1 to the designated position on the machining center and then installs the mounting base 3 onto the machining base to be processed. The operator then moves the machining base so that the positioning pin 4 is inserted into the positioning hole 11. Once the slide groove 12 is connected to the annular groove 41, the operator rotates the handle 52, which in turn rotates the outer disk 51. Because the arc-shaped slot 511 is eccentrically positioned on the outer disk 51, the sidewall of the arc-shaped slot 511 presses against the positioning bead 2 as the outer disk 51 rotates. This causes the positioning bead 2 to move towards the positioning pin 4 within the slide groove 12. The positioning bead 2 then partially slides out of the slide groove 12, into the annular groove 41, and abuts against the inner wall of the slide groove 12. Multiple positioning pins... Positioning beads 2 are pressed against different sides of positioning pin 4, thereby positioning pin 4 in positioning hole 11, and then positioning and installing mounting base 3 and machining base. By positioning and installing base 1 on machining center in advance, the installation position of subsequent machining base can be determined, saving the process of measuring machining base when installing machining base, effectively improving the convenience of installing machining base. Furthermore, through the bolt connection between mounting base 3 and machining base, when different machining bases need to be processed, mounting base 3 only needs to be removed from the completed machining base, and then mounted on different machining bases, so as to complete the quick positioning and installation on machining center of different machining bases.

[0041] Reference Figure 4 , Figure 5A limiting mechanism 9 is installed on the base 1 to limit the rotation direction of the outer disk 51. The limiting mechanism 9 includes a ratchet 91, a pawl 92, a spring 93, and a pushing assembly 94. The ratchet 91 is coaxially mounted on the outer disk 51, and the pawl 92 is hinged to the base 1. The pawl 92 abuts against the ratchet 91. When the outer disk 51 drives the ratchet 91 to slide in the direction that drives the positioning bead 2 to engage with the ring groove 41, the ratchet 91 can push the pawl 92 away. The spring 93 is mounted on the base 1 and connected to the pawl 92. The spring 93 always has the function of driving the pawl 92. The tendency to abut against the ratchet 91; the push assembly 94 is mounted on the base 1 and is used to drive the pawl 92 away from the ratchet 91. The push assembly 94 includes a cam 941, a connecting rod 942, a worm gear 943 and a worm 944. The cam 941 is rotatably mounted on the base and abuts against the ratchet 91. The connecting rod 942 rotatably passes through the base 1 and is connected to the cam 941. The worm gear 943 is coaxially mounted on the connecting rod 942. The worm 944 rotatably passes through the base 1 and meshes with the worm gear 943.

[0042] When the operator rotates the handle 52 to drive the outer disk 51 to slide in the direction that drives the positioning bead 2 to engage with the annular groove 41, the outer disk 51 drives the ratchet 91 to rotate. The ratchet 91 can disengage the pawl 92 and rotate normally. When the positioning pin 4 is pressed against the inner wall of the annular groove 41, the pawl 92 is pressed against the ratchet 91 under the action of the spring 93, restricting the ratchet 91 from reversing, and thus restricting the outer disk 51 from sliding away from the positioning bead 2. This allows the positioning bead 2 to be stably pressed against the inner wall of the annular groove 41, improving the stability of the positioning pin 4 when it is engaged in the annular groove 41, and thus improving the stability of the positioning bead 2 when positioning the positioning pin 4. After the processing base is completed, when it needs to be removed, the operator rotates the worm gear 944. The worm gear 944 drives the worm wheel 943 to rotate, the worm wheel 943 drives the connecting rod 942 to rotate, and the connecting rod 942 drives the cam 941 to rotate. The cam 941 then... The pawl 92, which is pressed against the ratchet 91, can be disengaged. At this time, the pawl 92 is no longer in contact with the ratchet 91, and the ratchet 91 can rotate in both directions. The operator reverses the handle 52, which drives the outer disk 51 to rotate in reverse, causing the positioning bead 2 to slide away from the positioning post 4 in the slide groove 12. The positioning bead 2 is no longer in contact with the positioning post 4. The operator moves the processing base to drive the positioning post 4 out of the positioning hole 11. Then, the operator reverses the worm gear 944, causing the cam 941 to rotate, which allows the pawl 92 to re-engage with the ratchet 91. This effectively improves the operator's convenience in controlling whether the pawl 92 engages with the ratchet 91, and thus improves the operator's convenience in restricting the rotation direction of the outer disk 51. Furthermore, through the self-locking mechanism of the worm gear 943 and worm 944, the cam 941 can be stably positioned at the current angle after the operator rotates the worm gear 944 to drive the cam 941 to rotate to different angles.

[0043] Reference Figure 6 Four positioning blocks 6 are slidably mounted on the base 1 towards the center of the positioning post 4. In this embodiment, four receiving grooves are provided on the base 1, and the four positioning blocks 6 slide in one of the receiving grooves respectively. The sidewalls of the receiving grooves guide the sliding of the positioning blocks 6, improving the stability of the positioning blocks 6 when sliding on the base 1. Four positioning grooves 31 are provided at the bottom of the mounting base 3, one positioning groove 31 corresponds to one positioning block 6, and the width of the positioning groove 31 is the same as the width of the positioning block 6. In this embodiment, the corners of the top of the positioning blocks 6 are all chamfered, making it easier for the positioning blocks 6 to be inserted into the positioning grooves 31. Four support blocks 10 are also installed on the top of the base 1. The tops of the four support blocks 10 are located on the same horizontal plane. When the mounting base 3 abuts against the base 1, the four support blocks 10 support the bottom of the mounting base 3, improving the flatness and stability of the mounting base 3.

[0044] When the operator moves the processing base so that the positioning pin 4 is inserted into the positioning hole 11, the four positioning pins 4 are respectively inserted into the corresponding positioning slots 31. The positioning block 6 positions the installation position of the mounting base 3, and the four positioning blocks 6 can restrict the positioning pin 4 from rotating in the positioning hole 11, thereby improving the stability of the mounting base 3 and thus effectively improving the stability of the processing base.

[0045] Reference Figure 6 , Figure 7 A sliding mechanism 7 is installed on the base 1. The sliding mechanism 7 is used to drive the positioning block 6 to slide on the base 1 in a direction closer to or further away from the center of the positioning post 4. In this embodiment, the end of the positioning block 6 near the positioning hole 11 is arranged in an arc shape to adapt to the outer periphery of the positioning post 4, so that the positioning block 6 can have a larger contact area with the positioning post 4 when it abuts against the positioning post 4. The sliding mechanism 7 includes a screw 71, a turntable 72 and a linkage assembly 73. Four screws 71 are rotatably threaded through the base 1, and the four screws 71 are threaded through one positioning block 6 in a one-to-one correspondence. On the top, the turntable 72 is coaxially mounted on the screw 71; the linkage component 73 is mounted on the turntable 72, and the drive component is used to drive the turntable 72 to rotate. The drive component includes a pull rope 731 and a torsion spring 732. One end of the pull rope 731 is wound around the turntable 72 and the other end is connected to the handle 52. The pull rope 731 can be a non-elastic rope such as a steel rope or a nylon rope. In this embodiment, the pull rope 731 is a steel rope. One end of the torsion spring 732 is mounted on the base 1 and the other end is connected to the turntable 72. The torsion spring 732 always has the tendency to drive the turntable 72 to rotate and wind up the pull rope 731.

[0046] After the positioning block 6 is inserted into the positioning groove 31 and the positioning pin 4 is inserted into the positioning hole 11, the operator can rotate the handle 52 to lock the positioning pin 4 into the positioning hole 11. While the handle 52 rotates the outer disc 51, it also pulls the pull rope 731, causing the pull rope 731 to be released from the turntable 72. As the pull rope 731 is released from the turntable 72, it drives the turntable 72 to rotate. The turntable 72 then drives the screw 71 to rotate, causing the positioning block 6 to move towards the positioning pin 4. Thus, all four positioning blocks 6 are... The positioning block 6 clamps the positioning post 4 on different sides, further positioning the positioning post 4 and improving its stability within the positioning hole 11. The clamping process of the positioning block 6 on the positioning post 4 is completed simultaneously when the operator rotates the handle 52, without requiring additional operation from the operator. When the operator rotates the handle 52 in the opposite direction to release the positioning of the positioning post 4, the torsion spring 732 can drive the turntable 72 to slide in a direction that drives the positioning block 6 away from the positioning post 4. During the rotation of the turntable 72, the pull rope 731 is wound onto the turntable 72.

[0047] Reference Figure 6A guide tube 8 is installed on the outer peripheral wall of the base 1, and the pull rope 731 slides through the guide tube 8. The guide tube 8 protects the pull rope 731 to prevent damage to the pull rope 731, and the guide tube 8 can guide the movement of the pull rope 731, making the movement of the pull rope 731 more stable when pulled by the handle 52. At the same time, the guide tube 8 can also guide the pull ropes 731 wound on different turntables 72 to the same direction, so that the pull ropes 731 wound on different turntables 72 can be connected to the handle 52 in the same direction, making it convenient for the handle 52 to pull out four pull ropes 731 at the same time.

[0048] The implementation principle of a mounting base processing fixture in this application embodiment is as follows: The operator pre-installs the base 1 to a predetermined position on the machining center using bolts, and then installs the mounting base 3 onto the processing base to be processed using bolts. At this time, the operator only needs to move the processing base so that the positioning pin 4 is inserted into the positioning hole 11 and the four positioning blocks 6 are respectively engaged in the four positioning grooves 31. Then, the operator rotates the handle 52, which drives the outer disk 51 to rotate. The outer disk 51 can then drive the positioning bead 2 to partially slide out from the inner side of the slide groove 12 and press against the inner wall of the annular groove 41. At the same time, the handle 52 will pull... When the pull rope 731 is released from the turntable 72, it drives the turntable 72 to rotate. The turntable 72 drives the screw 71 to rotate, causing the positioning blocks 6 to slide towards the positioning post 4. The four positioning blocks 6 are pressed against the positioning post 4, realizing the accurate positioning and installation of the mounting base 3 and the machining center. This eliminates the need for workers to measure the machining base when installing it. Furthermore, when machining different machining bases, it is only necessary to install the mounting base 3 onto the different machining bases without moving the base 1, thus achieving quick positioning and installation of different machining bases and effectively improving the convenience of installing the machining base.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A fixture for machining mounting bases, characterized in that: The system includes a base (1), positioning beads (2), a mounting base (3), positioning pins (4), and a drive mechanism (5). The base (1) is mounted on a machining center and has a positioning hole (11). Multiple sliding grooves (12) are provided on the side wall of the positioning hole (11) and communicate with it. One positioning bead (2) is slidably disposed within one sliding groove (12). The mounting base (3) is mounted on a machining base, and the positioning pin (4) is mounted on the mounting base. On the mounting base (3), the positioning post (4) has an annular groove (41) for the positioning bead (2) to be inserted; the driving mechanism (5) is mounted on the base (1) and is used to drive the positioning bead (2) to slide from the slide groove (12) into the annular groove (41); the driving mechanism (5) includes an outer disk (51) and a handle (52), the outer disk (51) is rotatably mounted on the base (1), and the outer disk (51) has multiple arc-shaped slots (511) eccentrically opened, one of the positioning bead (2) being inserted into the annular groove (41). The bead (2) is slidably disposed in an arc-shaped slot (511), and the handle (52) is disposed on the outer plate (51); the base (1) is provided with a plurality of positioning blocks (6), and the mounting base (3) is provided with a plurality of positioning grooves (31) for the positioning blocks (6) to be inserted; the plurality of positioning blocks (6) are slidably disposed on the base (1) toward the center of the positioning hole (11), and the base (1) is provided with a sliding mechanism for driving the positioning blocks (6) to slide. 7); The sliding mechanism (7) includes a screw (71), a turntable (72) and a linkage component (73). The screw (71) is rotatably inserted on a positioning block (6), and the turntable (72) is coaxially arranged on the screw (71). The linkage component (73) is arranged on the turntable (72) and is used to drive the turntable (72) to rotate. A guide groove (13) is provided on the top wall of the slide groove (12), and the positioning bead (2) is slidably arranged in the guide groove (13).

2. The fixture for machining the mounting base according to claim 1, characterized in that: The linkage component (73) includes a pull rope (731) and a torsion spring (732). The pull rope (731) is wound around a turntable (72) and is connected to a handle (52). The torsion spring (732) is mounted on a base and is connected to the turntable (72).

3. The fixture for machining the mounting base according to claim 2, characterized in that: The base (1) is provided with a plurality of guide tubes (8), and a pull rope (731) is threaded through a guide tube (8).

4. The fixture for machining the mounting base according to claim 1, characterized in that: The base (1) is provided with a limiting mechanism (9) for limiting the rotation direction of the outer disk (51). The limiting mechanism (9) includes a ratchet (91), a pawl (92), a spring (93), and a pushing assembly (94). The ratchet (91) is coaxially disposed on the outer disk (51). The pawl (92) is hinged to the base (1). The spring (93) is disposed on the base (1) and connected to the pawl (92). The pushing assembly (94) is disposed on the base (1) and is used to drive the pawl (92) away from the ratchet (91).

5. The fixture for machining the mounting base according to claim 4, characterized in that: The pushing assembly (94) includes a cam (941), a connecting rod (942), a worm gear (943), and a worm (944). The cam (941) is rotatably mounted on the base and abuts against a pawl (92). The connecting rod (942) is mounted on the cam (941). The worm gear (943) is coaxially mounted on the connecting rod (942). The worm (944) rotatably passes through the base (1) and meshes with the worm gear (943).

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