Positioning device special for rotary body

Abstract

The utility model provides a special locating device for a revolving body, which comprises a locating mechanism and a clamping mechanism, the locating mechanism comprises a locating body, an unthreaded hole pin rod and a threaded pin rod, and the locating body is an annular body and is used for carrying out center reference locating on the revolving body; the unthreaded hole pin rod is matched with the threaded bottom holes through the positioning body, and positioning of the multiple threaded bottom holes is achieved. The threaded pin rod is used for completing threaded hole positioning after tapping; the clamping mechanism is arranged in the center of the positioning body and comprises a ring body, a driving unit and a plurality of connecting rods, and the connecting rods can form clamping and loosening states under the action of the driving unit. The utility model solves the technical problems that the operation error is large, the perpendicularity is poor and the assembly coordination of the threaded hole is poor when the threaded hole of the rotary body is manually drilled and tapped in the prior art.

Description

Technical Field

[0001] This utility model belongs to the field of inspection devices, and in particular relates to a special positioning device for rotating bodies. Background Technology

[0002] In the field of machining, especially for rotating workpieces with complex structures, precision and consistency are key factors affecting production efficiency and product quality. In existing technologies, the outer surface of rotating bodies typically contains multiple fiber optic grooves and threaded holes to meet the needs of subsequent assembly and use. For such rotating bodies, the number of fiber optic grooves is relatively large, and the machining of the threaded holes requires high precision, especially during assembly, where ensuring the consistency of the threaded holes is crucial. However, existing manual bench drill-and-tap methods have the following problems in practical operation:

[0003] The complex structure of the rotating body and uneven operation can lead to errors: The outer surface of the rotating body has multiple fiber grooves. The presence of these grooves makes it easy for the workpiece surface to have uneven operating forces during drilling and tapping operations by a fitter. Especially during manual tapping, it is impossible to guarantee the perpendicularity of the threaded hole, thus affecting the machining quality of the threaded hole.

[0004] Low precision of manual operation: In existing fitter operations, manual mechanical drilling and tapping of threaded holes is prone to operational errors due to limitations in the precision and stability of human operation. These errors manifest as inaccurate hole positions, poor thread assembly consistency, and especially the inability to guarantee the fit between multiple threaded holes, which brings significant difficulties to the subsequent assembly process.

[0005] Therefore, in existing technologies, manual drilling and tapping cannot effectively guarantee the accuracy and consistency of threaded holes, especially in mass production tasks, where the machining of threaded holes in rotating bodies presents significant quality control challenges. To address these issues, there is an urgent need to develop a dedicated positioning device for rotating bodies to ensure precise positioning and uniform machining of threaded holes during mechanical drilling and tapping, thereby improving the perpendicularity of the threaded holes and assembly consistency, and meeting the accuracy requirements of mass production. Utility Model Content

[0006] Details of one or more embodiments of the present invention are set forth in the following drawings and description to make other features, objects and advantages of the present application more readily apparent.

[0007] This utility model proposes a special positioning device for rotating bodies, which solves the technical problems of large operation error, poor perpendicularity, and poor coordination of threaded hole assembly when manually drilling and tapping threaded holes of rotating bodies in the prior art. It has the characteristics of high-precision positioning, simple operation, adaptability to complex structures, and improved production efficiency, and can effectively solve the error problem in threaded hole processing.

[0008] This utility model discloses a special positioning device for a rotating body. The rotating body has multiple threaded bottom holes along its circumferential direction on its rotating surface. The special positioning device is used for tapping these threaded bottom holes. The device includes: a positioning mechanism comprising a positioning body, a blanking pin, and a threaded pin. The positioning body is annular and inserted into the end of the rotating body with the threaded bottom holes, used to achieve center reference positioning during the threaded bottom hole machining process. The blanking pin passes through the positioning body and engages with the threaded bottom holes to position the multiple threaded bottom holes. The threaded pin is used to position the threaded holes after tapping. A clamping mechanism is installed in the center of the positioning body. The clamping mechanism includes an annular body, a drive unit installed in the center of the annular body, and multiple connecting rods. Each connecting rod is connected to the drive unit and can move back and forth along a preset path under the action of the drive unit, realizing the switching between clamping and releasing states.

[0009] In some embodiments, the preset path is a cam groove with a curved trajectory, and the connecting rod moves from a first position to a second position along the cam groove under the rotational motion of the drive unit; the first position is the position where the connecting rod is away from the center of the ring body, forming a clamping state and supporting the inner cavity of the positioning body; the second position is the position where the connecting rod is close to the center of the ring body, forming a loosening state and releasing the inner cavity of the positioning body.

[0010] In some embodiments, the positioning body is provided with an insertion groove for receiving the end of the rotating body, the shape of which matches the shape of the end of the rotating body to ensure a stable connection between the rotating body and the dedicated positioning device for the rotating body.

[0011] In some embodiments, the positioning body is provided with a first through hole corresponding to the threaded bottom hole, for inserting a light hole pin for positioning.

[0012] In some embodiments, the clamping mechanism further includes: a base; a stepped pivot shaft located at the center of the base; a turntable inserted on the stepped pivot shaft, the turntable and the stepped pivot shaft being connected by a drive unit, and the turntable having multiple cam grooves for the reciprocating movement of the connecting rod.

[0013] In some embodiments, the ring body is provided with a plurality of second through holes along the circumferential direction, one end of the connecting rod passes through the second through hole and moves back and forth along the second through hole to realize the switching between clamping and loosening states.

[0014] In some embodiments, the other end of the connecting rod is provided with a groove, and the two ends of the groove are provided with a through third hole. The turntable is inserted into the groove, and the cam groove of the turntable is located between the third through holes. The screw passes through the third through hole and connects to the turntable, so that the connecting rod moves back and forth along the cam groove track under the drive of the screw, thereby realizing the conversion between the clamping and releasing states.

[0015] In some embodiments, the drive unit is a bolt, which is fixedly connected to the stepped rotating shaft. The bolt drives the turntable to rotate, causing the connecting rod to move back and forth along the cam groove trajectory, thereby realizing the switching between clamping and releasing states.

[0016] In some embodiments, the movement of the link is defined by the geometry of the cam groove to ensure a smooth transition of the link between a first position and a second position.

[0017] In some embodiments, the rotary body positioning device further includes a limiting device, which includes: a limiting block mounted on a tap for tapping, for limiting the depth of the threaded hole; and a fastener for fastening the limiting block and the tap together.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. This utility model discloses a dedicated positioning device for rotating bodies. By setting up a positioning mechanism and a clamping mechanism, it achieves precise positioning and stable clamping of rotating bodies during the machining of threaded bottom holes, thereby solving the problems of insufficient positioning accuracy, instability of the rotating body during machining, and low machining efficiency in existing technologies. The positioning mechanism of this device utilizes the cooperation between the threaded pin and the threaded bottom hole to ensure the center reference positioning of the rotating body during machining, avoiding machining errors caused by the offset or shaking of the rotating body in traditional methods. In addition, the positioning function of the threaded pin after tapping further ensures the machining accuracy of the threaded hole.

[0020] 2. The clamping mechanism of this utility model drives multiple connecting rods to move along a preset path via a drive unit, achieving flexible switching between clamping and releasing. In particular, the preset path employs a curved cam groove design, allowing the connecting rods to smoothly transition to the clamping or releasing state under the rotational motion of the drive unit. This ensures that the positioning body tightly supports the inner cavity of the rotating body, effectively preventing movement or loosening of the rotating body during processing. Simultaneously, this design provides a high degree of automation; stable clamping and rapid release of the rotating body can be achieved through simple drive unit operation, greatly improving processing efficiency, reducing manual intervention, and enhancing the ease of operation and reliability of the entire positioning device.

[0021] 3. The structural design of this utility model also considers rotating bodies of different specifications and shapes. By precisely matching the insertion groove of the positioning body with the shape of the rotating body's end, the wide applicability of the positioning device is ensured, enabling stable positioning of various types of rotating bodies and expanding its application range. Furthermore, by setting first through holes on the positioning body that correspond one-to-one with the threaded bottom holes, the smooth hole pin can be quickly inserted, achieving simultaneous positioning of multiple threaded holes. This reduces the time spent on multiple positioning adjustments and further improves processing efficiency.

[0022] 4. This utility model also incorporates a limiting device, which precisely controls the depth during the tapping process, preventing damage or defects to the threaded hole due to over-processing, thus further improving processing stability and product quality. Overall, this utility model's rotary body-specific positioning device is not only compact and easy to operate, but also significantly improves processing accuracy and efficiency. It can be widely applied in the manufacturing of various rotary parts requiring high-precision thread processing, and is particularly suitable for rotary parts with high positioning difficulty, demonstrating promising market application prospects and promotional value. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0024] Figure 1 This is a schematic diagram of the special positioning device for a rotating body provided in an embodiment of the present invention, showing the rotating body in a clamped state.

[0025] Figure 2 This is a schematic diagram of the special positioning device for a rotating body provided in an embodiment of the present invention and the rotating body in the released state.

[0026] Figure 3 This is a schematic diagram of the structure of the rotary body positioning device provided in an embodiment of the present utility model;

[0027] Figure 4 This is a front view of the positioning body provided in an embodiment of the present utility model;

[0028] Figure 5 Provided for the embodiments of this utility model Figure 4 AA section view;

[0029] Figure 6 This is a front view of the clamping mechanism provided in an embodiment of the present utility model;

[0030] Figure 7 Provided for the embodiments of this utility model Figure 6 BB cross-sectional view;

[0031] Figure 8 This is a schematic diagram of the connecting rod provided in an embodiment of the present utility model;

[0032] Figure 9 A schematic diagram of the limiting device provided in the embodiment of this utility model.

[0033] Figure 10 This is a schematic diagram of the structure of the rotating body provided in the embodiment of this utility model;

[0034] In the above figures:

[0035] 1-Positioning mechanism; 101-Positioning body; 1011-Insert groove; 1012-First through hole; 102-Smooth hole pin; 103-Threaded pin; 2-Clamping mechanism; 201-Ring body; 2011-Second through hole; 202-Drive unit; 203-Connecting rod; 2031-Groove; 2032-Third through hole; 204-Turntable; 2041-Cam groove; 205-Base; 206-Stepped rotating shaft; 207-Screw; 3-Limiting device; 301-Limiting block; 302-Fastener; 4-First position; 5-Second position; A-Rotating body; A1-Threaded bottom hole. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described and explained below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments provided by this utility model without inventive effort are within the scope of protection of this utility model.

[0037] This utility model embodiment provides a special positioning device for a rotating body, see reference. Figures 1-10As shown, a special positioning device for a rotating body is disclosed. The rotating body A has multiple threaded holes A1 along its circumferential direction on its rotating surface. The special positioning device is used for tapping the threaded holes A1. The device includes a positioning mechanism 1 and a clamping mechanism 2. The positioning mechanism 1 includes a positioning body 101, a blanking pin 102, and a threaded pin 103. The positioning body 101 is annular and is inserted into the end of the rotating body A with the threaded holes A1, used to achieve center datum positioning during the machining of the threaded holes A1. The blanking pin 102... The positioning body 101 and threaded hole A1 are engaged. Positioning of multiple threaded holes A1 is achieved through the smooth hole pin 102. The threaded pin 103 is used to position the threaded holes after tapping. A clamping mechanism 2 is installed in the center of the positioning body 101. The clamping mechanism 2 includes a ring 201, a drive unit 202 installed in the center of the ring 201, and multiple connecting rods 203. Each connecting rod 203 is connected to the drive unit 202. Under the action of the drive unit 202, the connecting rod 203 moves back and forth along a preset path, realizing the switching between clamping and releasing states. This rotary body-specific positioning device ensures the precise alignment of multiple threaded holes A1 through the positioning mechanism 1. The ring structure of the positioning body 101 provides stable support for the positioning pin. The smooth hole pin 102 passes through the positioning body 101 and enters the threaded hole A1, thereby achieving accurate positioning. After tapping, the threaded pin 103 is inserted into the threaded hole for positioning, ensuring the stability of subsequent processing. The connecting rod 203 of the clamping mechanism 2 moves along a preset path via the drive unit 202. The clamping action of the connecting rod 203 securely fixes the rotating body A, thus maintaining precise positioning during processing. This implementation effectively improves the accuracy and stability of threaded hole machining. The combined positioning of the positioning body 101 and the hole pin 102 ensures precise alignment of the threaded hole, thereby reducing machining errors. Simultaneously, the clamping mechanism 2, through the drive unit 202, enables stable clamping and releasing operations, guaranteeing positioning stability during machining and improving processing efficiency.

[0038] In some embodiments, the diameter of the threaded pin 102 can be adjusted according to the size of the threaded bottom hole A1 to accommodate rotating bodies A of different specifications. Furthermore, the threaded pin 103 can also be modified according to the size of the threaded hole to ensure positioning accuracy.

[0039] Furthermore, the cam groove 2041, with a preset path of a curved trajectory, allows the connecting rod 203 to move from the first position 4 to the second position 5, or from the second position 5 to the first position 4, under the rotational motion of the drive unit 202. The first position 4 is where the connecting rod 203 is away from the center of the ring body 201, forming a clamped state and tightening the inner cavity of the positioning body 101; the second position 5 is where the connecting rod 203 is close to the center of the ring body 201, forming a released state and releasing the inner cavity of the positioning body 101. This invention utilizes the curved trajectory of the cam groove 2041 to control the position change of the connecting rod 203. Through the rotation of the drive unit 202, the connecting rod 203 moves along the cam groove 2041, thereby switching between the first position 4 and the second position 5. The movement path of connecting rod 203 is determined by the geometry of cam groove 2041. When connecting rod 203 is in the first position 4, it is away from the center of ring 201, forming a clamping state; when it is in the second position 5, connecting rod 203 retracts inward, releasing the inner cavity of positioning body 101. Using a curved trajectory cam groove 2041 to control the movement of connecting rod 203 enables precise and smooth clamping and releasing operations, reducing errors in the positioning and clamping process, and achieving mechanized operation without a complex control system. This design further improves the operating efficiency and positioning accuracy of the dedicated positioning device for rotary body A.

[0040] In some embodiments, the shape of the cam groove 2041 can be adjusted according to specific needs, employing more complex or simplified curves to adapt to different mechanical requirements. The length and diameter of the connecting rod 203 can also be adaptively adjusted according to specific needs.

[0041] Furthermore, the positioning body 101 is provided with an insertion groove 1011 for receiving the end of the rotating body A. The shape of the insertion groove 1011 matches the shape of the end of the rotating body A to ensure a stable connection between the rotating body A and the dedicated positioning device for the rotating body. The stable connection of the rotating body A is ensured by designing the insertion groove 1011 within the positioning body 101. The shape of the insertion groove 1011 is precisely designed to match the shape of the end of the rotating body A, thereby achieving a tight fit between the rotating body A and the positioning device, ensuring that no loosening or displacement occurs during processing. The matching insertion groove 1011 significantly improves the stability of positioning, avoiding offset or vibration caused by improper assembly during processing. This method simplifies the operation process and reduces the difficulty of workpiece positioning while improving assembly accuracy.

[0042] In some embodiments, the shape of the insertion slot 1011 can be customized according to the actual shape of the end of the rotating body A, for example, it can be designed as a circle, a square or other irregular shape. The size of the insertion slot 1011 can also be adjusted to accommodate rotating bodies A of different specifications, ensuring the diversity and adaptability of assembly.

[0043] Furthermore, the positioning body 101 is provided with first through holes 1012 corresponding one-to-one with the threaded bottom holes A1, for inserting the smooth hole pin 102 for positioning. By setting multiple first through holes 1012 corresponding to the threaded bottom holes A1 on the positioning body 101, accurate insertion and positioning of the smooth hole pin 102 can be achieved. Each threaded bottom hole A1 corresponds one-to-one with a first through hole 1012, thereby ensuring that the smooth hole pin 102 can be accurately inserted into each threaded bottom hole A1, ensuring positioning accuracy during the processing. Through the design of the first through holes 1012, the smooth hole pin 102 can quickly and accurately enter the threaded bottom hole A1 for positioning. This design not only simplifies the operation steps, but also significantly improves the positioning accuracy of the threaded bottom hole A1 and reduces processing errors. At the same time, it can adapt to the positioning needs of multiple threaded bottom holes A1, improving processing efficiency.

[0044] Furthermore, the clamping mechanism 2 also includes a base 205, a stepped rotating shaft 206, and a turntable 204. The stepped rotating shaft 206 is located at the center of the base 205, and the turntable 204 is inserted into the stepped rotating shaft 206. The turntable 204 and the stepped rotating shaft 206 are connected through a drive unit 202. The turntable 204 has multiple cam grooves 2041 for the reciprocating movement of the connecting rod 203. The movement of the connecting rod 203 is achieved through the cooperation of the base 205, the stepped rotating shaft 206, and the turntable 204. The stepped rotating shaft 206 is fixed to the center of the base 205 and provides rotational support. The turntable 204 is inserted into the stepped rotating shaft 206 and connected to the drive unit 202. When the drive unit 202 drives the turntable 204 to rotate, the cam grooves 2041 on the turntable 204 guide the connecting rod 203 to reciprocate along a predetermined path, thereby realizing the clamping and releasing action of the connecting rod 203. By incorporating the stepped rotating shaft 206 and the turntable 204 structure, the clamping mechanism 2 operates more stably and reliably. The cam groove 2041 on the turntable 204 can precisely control the movement trajectory of the connecting rod 203, ensuring smooth and vibration-free operation of the connecting rod 203 during clamping and releasing. The design of the stepped rotating shaft 206 increases the stability of the device, ensuring that the device is less prone to deviation or vibration during high-precision machining.

[0045] Furthermore, the ring 201 has multiple second through holes 2011 along its circumference. One end of the connecting rod 203 passes through the second through hole 2011 and moves back and forth along the second through hole 2011 to switch between clamping and releasing states. The movement of the connecting rod 203 is achieved through the second through holes 2011 on the ring 201. The ring 201 has multiple second through holes 2011 along its circumference, and one end of each connecting rod 203 passes through the second through hole 2011. Under the control of the drive unit 202, the connecting rod 203 moves back and forth within the second through hole 2011, thereby switching between clamping and releasing states of the rotating body A. This design ensures the stability of the movement of the connecting rod 203 within the ring 201. Through the constraint of the second through hole 2011, the connecting rod 203 will not deviate during movement, and the clamping or releasing action can be accurately achieved. The multi-through hole design allows multiple connecting rods 203 to work simultaneously, greatly improving the efficiency of the clamping operation.

[0046] Furthermore, the other end of the connecting rod 203 is provided with a groove 2031, and both ends of the groove 2031 are provided with through third holes 2032. The turntable 204 is inserted into the groove 2031, and the cam groove 2041 of the turntable 204 is located between the third holes 2032. The screw 207 passes through the third hole 2032 and connects to the turntable 204, so that the connecting rod 203 moves back and forth along the trajectory of the cam groove 2041 under the drive of the screw 207, realizing the conversion between the clamping and releasing states. By providing a groove 2031 at the end of the connecting rod 203, and using the third hole 2032 in the groove 2031, the connecting rod 203 and the turntable 204 are fixedly connected. The cam groove 2041 on the turntable 204 guides the connecting rod 203 to move along a predetermined trajectory. The screw 207 fixes the connecting rod 203 to the turntable 204 through the third through hole 2032. Driven by the screw 207, the connecting rod 203 reciprocates along the cam groove 2041, completing the clamping and releasing actions. This design makes the connection between the connecting rod 203 and the turntable 204 more stable. The tightening effect of the screw 207 through the third through hole 2032 effectively reduces the shaking generated by the connecting rod 203 during movement. By providing the groove 2031 on the connecting rod 203, it can be better embedded into the turntable 204, ensuring the smooth movement of the connecting rod 203 along the cam groove 2041, thereby improving the reliability of the device.

[0047] In some embodiments, the size and shape of the groove 2031 can be optimized according to the specific design of the connecting rod 203 and the turntable 204 to ensure a firm connection and smooth movement. The diameter and position of the third through hole 2032 can also be adjusted according to the size of the screw 207 to accommodate fasteners of different specifications. In addition, a quick-release screw 207 design can be used to improve the ease of maintenance and operation of the equipment.

[0048] Furthermore, the drive unit 202 is a bolt, which is fixedly connected to the stepped rotating shaft 206. The bolt drives the turntable 204 to rotate, causing the connecting rod 203 to reciprocate along the trajectory of the cam groove 2041, thus achieving the switching between clamping and releasing states. Using a bolt as the drive unit 202, with the bolt fixedly connected to the stepped rotating shaft 206, rotating the bolt drives the turntable 204 to rotate, thereby causing the connecting rod 203 to reciprocate along the trajectory of the cam groove 2041 on the turntable 204. Guided by the cam groove 2041, the connecting rod 203 achieves the switching between clamping and releasing states. Using a bolt as the drive unit 202 has the advantages of simple structure and convenient operation. Driving the turntable 204 by rotating the bolt achieves a stable and reliable transmission effect, reduces the failure rate, and facilitates equipment installation and maintenance. This design is suitable for applications requiring precise control of the connecting rod 203's movement, helping to improve overall machining accuracy.

[0049] Furthermore, the movement of the connecting rod 203 is defined by the geometry of the cam groove 2041 to ensure a smooth transition between the first position 4 and the second position 5. The movement of the connecting rod 203 is guided by a cam groove 2041 with a specific geometry. The geometry of the cam groove 2041 defines the movement trajectory of the connecting rod 203, enabling a smooth transition between the first position 4 (clamped state) and the second position 5 (released state), avoiding abrupt changes in movement. The optimized geometry of the cam groove 2041 ensures a smooth transition in the movement of the connecting rod 203, thereby reducing vibration and wear caused by discontinuous movement and extending the service life of the equipment. This design also improves the accuracy of clamping and releasing actions, further optimizing the positioning effect.

[0050] Furthermore, the rotary positioning device also includes a limiting device 3, which comprises a limiting block 301 and multiple fasteners 302. The limiting block 301 is mounted on the tap used for tapping and is used to limit the depth of the threaded hole. The fasteners 302 are used to securely connect the limiting block 301 and the tap. By installing the limiting block 301 on the tap and securing it to the tap with the fasteners 302, the movement depth of the tap is limited. The limiting block 301 ensures that the tap will not exceed the predetermined threaded hole depth during tapping, thereby controlling the machining accuracy. The limiting device 3 can precisely control the tapping depth, avoiding damage or substandard accuracy caused by over-tapping. This device is simple to operate, can quickly adjust the threaded hole depth, is suitable for different thread processing needs, and the connection of the fasteners 302 ensures the stability of the limiting block 301.

[0051] In some embodiments, the size and shape of the limiting block 301 can be adjusted according to different sizes of taps. The fastener 302 can also be a quick-tightening device for easy installation and removal.

[0052] The process of using the above-mentioned special positioning device for rotating bodies is as follows:

[0053] First, the positioning body 101 is installed at one end of the rotating body A, and the first through hole 1012 of the positioning body 101 is inserted through the hole pin 102 to achieve precise positioning of the threaded bottom hole A1. Then, the clamping mechanism 2 is activated, and the connecting rod 203 is clamped to the rotating body A by the drive unit 202 to ensure its stable fixation during processing. Next, the tapping operation is performed, and the tapping depth is controlled by the limit device 3. After tapping is completed, the thread pin 103 is used for repositioning. Finally, the clamping mechanism 2 is released, the positioning device is removed, the quality of the threaded hole is checked, and necessary post-processing is performed.

[0054] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A positioning device for a rotating body, wherein the rotating body has a plurality of threaded holes along the circumferential direction on its rotating surface, and the positioning device for tapping the threaded holes is characterized in that, The dedicated positioning device for the rotating body includes: The positioning mechanism includes a positioning body, a smooth hole pin, and a threaded pin. The positioning body is annular and is inserted into one end of a rotating body with a threaded bottom hole. It is used to achieve center reference positioning during the machining of the threaded bottom hole. The smooth hole pin passes through the positioning body and engages with the threaded bottom hole to achieve positioning of multiple threaded bottom holes. The threaded pin is used to complete the positioning of the threaded hole after tapping. A clamping mechanism is installed in the center of the positioning body. The clamping mechanism includes a ring body, a drive unit installed in the center of the ring body, and multiple connecting rods. Each connecting rod is connected to the drive unit. The connecting rod can move back and forth along a preset path under the action of the drive unit to realize the switching between clamping and releasing states.

2. The rotary body positioning device according to claim 1, characterized in that, The preset path is a curved trajectory cam groove, and the connecting rod moves from the first position to the second position or from the second position to the first position along the cam groove under the rotational motion of the drive unit; The first position is where the connecting rod is far from the center of the ring body, forming a clamped state and supporting and positioning the inner cavity of the main body; The second position is the position where the connecting rod is close to the center of the ring body, so as to form a released state and release the positioning body's internal cavity.

3. The rotary positioning device according to claim 1, characterized in that, The positioning body is provided with an insertion groove for receiving the end of the rotating body. The shape of the insertion groove matches the shape of the end of the rotating body to ensure a stable connection between the rotating body and the dedicated positioning device for the rotating body.

4. The special positioning device for rotating bodies according to claim 1, characterized in that, The positioning body is provided with a first through hole that corresponds one-to-one with the threaded bottom hole, for inserting a light hole pin for positioning.

5. The special positioning device for a rotating body according to claim 1, characterized in that, The clamping mechanism further includes: Base; A stepped pivot is located in the center of the base; A turntable is inserted on a stepped rotating shaft. The turntable and the stepped rotating shaft are connected by a drive unit. The turntable is provided with multiple cam grooves for the reciprocating movement of the connecting rod.

6. The special positioning device for rotating bodies according to claim 1, characterized in that, The ring body is provided with multiple second through holes along the circumferential direction. One end of the connecting rod passes through the second through hole and moves back and forth along the second through hole to realize the switching between clamping and loosening states.

7. The rotary body positioning device according to claim 5, characterized in that, The other end of the connecting rod is provided with a groove, and the two ends of the groove are provided with a through third hole. The turntable is inserted into the groove, and the cam groove of the turntable is located between the third holes. The screw passes through the third hole and connects to the turntable, so that the connecting rod moves back and forth along the cam groove track under the drive of the screw, realizing the conversion between clamping and releasing states.

8. The special positioning device for rotating bodies according to claim 1, characterized in that, The drive unit is a bolt, which is fixedly connected to the stepped rotating shaft. The bolt drives the turntable to rotate, causing the connecting rod to move back and forth along the cam groove trajectory, thereby realizing the switching between clamping and releasing states.

9. The special positioning device for rotating bodies according to claim 1, characterized in that, The movement of the link is defined by the geometry of the cam groove to ensure a smooth transition between the first and second positions.

10. The positioning device for a rotating body according to claim 1, characterized in that, It also includes a limiting device, the limiting device comprising: A limiting block, which is mounted on a tap used for tapping, is used to limit the depth of the threaded hole; Multiple fasteners are used to securely connect the limiting block and the tap.

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