Single drive dual control type clamping and rotating drive mechanism

Abstract

The application discloses a single-drive double-control type clamping rotary driving mechanism, which comprises a base, a driving motor, a clamping jaw mechanism, a transmission mechanism, a clutch mechanism and an intermediate rotary cylinder, the base is provided with a base through hole, the driving motor is installed on the base, the clamping jaw mechanism is located at one end of the base through hole, the intermediate rotary cylinder is installed in the base through hole, the intermediate rotary cylinder is connected with the hole wall of the base through hole through a rotary cylinder bearing, the rotary cylinder bearing is a one-way bearing, the transmission mechanism is installed in the base through hole and is connected with the rotating shaft of the driving motor and the clamping jaw mechanism respectively, the clamping jaw mechanism is installed at one end of the intermediate rotary cylinder, and the clutch mechanism is installed in the base through hole and is connected with the transmission mechanism and the intermediate rotary cylinder respectively. The application realizes the function that a driving motor is used to drive the transmission mechanism, the clamping jaw mechanism, the intermediate rotary cylinder and the clutch mechanism to rotate synchronously after clamping the workpiece, saves the purchase cost of the driving equipment, and reduces the volume and weight of the whole machine.

Description

TECHNICAL FIELD

[0001] The present application relates to a clamping and rotating driving mechanism capable of clamping a workpiece and driving it to rotate, in particular to a single-drive double-control clamping and rotating driving mechanism, and belongs to the technical field of rotating driving. BACKGROUND

[0002] In the lathe processing industry and the design of non-standard equipment similar to the lathe, during the ring cutting process of pipe or bar workpieces, the workpiece needs to be clamped first, then rotated, and then the ring cutting function is realized through tool feeding. Among them, the clamping method of the workpiece generally adopts a chuck or a jaw mechanism. The chuck generally drives the workpiece to be clamped by a hydraulic cylinder, and the jaw mechanism generally clamps the workpiece by driving multiple jaws installed in the circumferential direction by a motor. The rotating method drives the entire clamping mechanism to rotate by a motor.

[0003] The above-mentioned two consecutive actions of clamping and rotating are completed by independent driving in the traditional driving method, so two driving devices are needed, such as two driving motors or a driving motor and a driving hydraulic cylinder. This traditional structure has the following defects:

[0004] If the driving structure of the motor and the hydraulic cylinder is adopted, the hydraulic cylinder needs to rotate with the main shaft, so a hydraulic slip ring needs to be used. Long-term use of the hydraulic slip ring will cause problems such as oil leakage and failure. If two motors are used for driving, the internal motor and the cable outside also need to be connected through a slip ring, which will also cause problems such as slip ring wear and tear, poor contact or disconnection. In addition, two driving devices also have the problems of large overall structure, large mass and high failure rate.

[0005] In addition, when the equipment needs to be used in harsh environments such as ultra-high temperature, ultra-low temperature or strong radiation environment, the driving motor with resistance to these environments is quite expensive, and the use of two driving devices increases the production cost of enterprises. SUMMARY

[0006] The purpose of the present application is to provide a single-drive double-control clamping and rotating driving mechanism that can complete the clamping and rotating driving of a workpiece with only one driving device to solve the above problems.

[0007] The present application achieves the above-mentioned purpose through the following technical solutions:

[0008] The utility model provides a single drive double -controlled type clamping rotary drive mechanism, including base, drive motor and jaw mechanism, the base is equipped with the base through -hole of radial section is circular, drive motor is installed on the outer wall of base, jaw mechanism is located one end in base through -hole and can realize clamping function under the rotary drive of the rotary shaft of drive motor and realizes the function of loosening under the reverse rotary drive of rotary shaft of drive motor, the single drive double -controlled type clamping rotary drive mechanism still includes transmission mechanism, clutch and intermediate slewing cylinder, the intermediate slewing cylinder of cylinder body shape is installed in base through -hole and the center line of both coincides with each other, the outer wall of intermediate slewing cylinder and the hole wall of base through -hole are connected through slewing cylinder bearing, slewing cylinder bearing is one -way bearing, transmission mechanism is installed in base through -hole and is connected with rotary shaft of drive motor and jaw mechanism respectively, jaw mechanism is installed in one end of intermediate slewing cylinder, clutch is installed in base through -hole and is connected with transmission mechanism and intermediate slewing cylinder respectively, and the clutch is used for making intermediate slewing cylinder can not rotate relative to base before jaw mechanism completes clamping function and can rotate relative to base after jaw mechanism completes clamping function.

[0009] As preferred, in order to realize the preferred transmission process of idle start, gradual loading, driving clamping and rotating driving in turn, the transmission mechanism comprises a worm, a worm gear assembly, a transmission ring, a first compression spring, a follower ring, a friction ring and a hollow main shaft, the hollow main shaft in the shape of a cylinder is arranged in the central through hole of the intermediate rotary cylinder and the center lines of both coincide with each other, the through hole main shaft bearing is connected between the outer wall of the hollow main shaft near the first end of the two ends and the inner wall of the intermediate rotary cylinder, the worm gear assembly in the shape of a ring, the transmission ring in the shape of a ring, the follower ring in the shape of a ring and the friction ring in the shape of a ring are all sleeved on the outer wall of the hollow main shaft near the second end of the two ends through the central through holes of themselves and are arranged in turn and side by side in the axial direction, the worm gear assembly comprises a worm gear ring and a first spur gear ring which are arranged side by side and are integrally formed, a plurality of outward protruding worm gears are uniformly arranged on the circumferential outer wall of the worm gear ring and are connected with the worm gears on the worm through the worm gears, the worm is installed in the base through hole through the worm bearing and the axial direction of the worm is perpendicular to the axial direction of the base through hole, one end of the worm is connected with the rotating shaft of the driving motor through the corresponding through hole in the hole wall of the base through hole, a plurality of outward protruding strip-shaped spur gears are uniformly arranged on the circumferential outer wall of the first spur gear ring and the axial direction of the strip-shaped spur gears is parallel to the axial direction of the central through hole of the worm gear assembly, the central through hole of the worm gear assembly is connected with the outer wall of the hollow main shaft through the worm gear assembly bearing, the transmission ring comprises a disc which is extended to the radial outer peripheral direction, the second spur gear ring and the third spur gear ring are respectively arranged at the positions near the central through hole on the two sides of the disc in the axial direction, a plurality of strip-shaped spur gears which are protruded to the center line direction are uniformly arranged on the circumferential inner wall of the second spur gear ring, a plurality of outward protruding strip-shaped spur gears are uniformly arranged on the circumferential outer wall of the third spur gear ring, the strip-shaped spur gears of the second spur gear ring and the strip-shaped spur gears of the third spur gear ring are both parallel to the axial direction of the central through hole of the transmission ring, the second spur gear ring is sleeved outside the first spur gear ring and the strip-shaped spur gears of the second spur gear ring are connected with the strip-shaped spur gears of the first spur gear ring through engagement, the inner thread is arranged on the circumferential inner wall of the third spur gear ring, the outer thread is arranged on the outer wall of the hollow main shaft at the corresponding position of the third spur gear ring and is connected with the inner thread of the third spur gear ring through the outer thread, a plurality of strip-shaped spur gears which are protruded to the center line direction are uniformly arranged on the circumferential inner wall of the follower ring and the axial direction of the strip-shaped spur gears is parallel to the axial direction of the central through hole of the follower ring, the follower ring is sleeved outside the third spur gear ring through the central through hole of itself, the strip-shaped spur gears of the follower ring are connected with the strip-shaped spur gears of the third spur gear ring through engagement, a plurality of follower ring blind holes are uniformly arranged on the circular ring surface of one side of the follower ring which is close to the transmission ring, a plurality of transmission ring blind holes are uniformly arranged on the surface of one side of the disc of the transmission ring which is close to the follower ring in the circumferential direction, the two ends of a plurality of the first compression springs are respectively arranged in a plurality of the follower ring blind holes and a plurality of the transmission ring blind holes,The center through-hole wall of the friction ring is in close contact with the circumferential outer wall of the hollow spindle, one side of the circular surface of the friction ring is close to the side of the follow-up ring away from the drive ring, the other side of the circular surface of the friction ring is in close contact with the outward convex circular stepped surface on the circumferential outer wall of the hollow spindle, and the first end of the hollow spindle is close to and connected with the jaw mechanism.

[0010] As a preferred, in order to realize the reliable clamping function of the workpiece and drive the intermediate rotary cylinder to rotate synchronously, the jaw mechanism comprises a plurality of jaws, a plurality of pull rods, a plurality of pin shafts, a plurality of connecting screws, a plurality of drive screws and a driving disc, the jaw is isosceles triangle or similar isosceles triangle, and the two base angles of the jaw are large end and the vertex angle is small end, the large end of the plurality of jaws is respectively connected with one end of the plurality of pull rods through the plurality of pin shafts, the other end of the plurality of pull rods is respectively and uniformly installed on the corresponding circular end of the intermediate rotary cylinder, the small end of the plurality of jaws is close to the center line of the intermediate rotary cylinder and surrounds a clamping hole in a circular shape, the plurality of connecting screws are respectively located in the gap between the plurality of pull rods and the large end of the plurality of jaws and are connected with the first end of the hollow spindle, the plurality of drive screws are respectively connected with the driving disc and the large end of the plurality of connecting screws, the plurality of jaws are located between the driving disc and the first end of the hollow spindle, the side surface of the jaw close to the hollow spindle is provided with an outward convex jaw protruding strip, the first end of the hollow spindle is uniformly provided with a plurality of spindle grooves in the circumferential direction, and the plurality of jaw protruding strips are respectively arranged in the plurality of spindle grooves and can be blocked by the groove wall of the spindle groove after sliding in the spindle groove by an arc distance.

[0011] As a preferred, in order to facilitate the transmission mechanism to achieve the function of the intermediate rotary cylinder can not rotate relative to the base before the jaw mechanism completes the clamping function and can rotate relative to the base after the jaw mechanism completes the clamping function, the clutch mechanism comprises a clutch ring, a clutch rod and a second compression spring, the circular ring-shaped clutch ring is sleeved on the outer wall of the intermediate rotary cylinder through the central through hole and is located in the base through hole, a plurality of radial clutch ring through holes are uniformly arranged on the ring wall of the clutch ring in the circumferential direction, a ball is installed in each clutch ring through hole, the outer diameter of the ball is greater than the axial length of the clutch ring through hole, a plurality of rotary cylinder ball grooves are arranged on the circumferential outer wall of the intermediate rotary cylinder, which are uniformly distributed in the circumferential direction and are strip-shaped in the axial direction of the intermediate rotary cylinder, a plurality of first base ball grooves are arranged on the hole wall of the base through hole, which are uniformly distributed in the circumferential direction and are strip-shaped in the axial direction of the base through hole, a plurality of second base ball grooves are arranged on the hole wall of the base through hole, which are circular in the circumferential direction and intersect the middle sections of a plurality of first base ball grooves respectively, a plurality of balls on the clutch ring are simultaneously located in a plurality of rotary cylinder ball grooves and a plurality of first base ball grooves respectively, a plurality of clutch ring protrusions are arranged on the circumferential inner wall of the clutch ring, which are uniformly distributed in the circumferential direction and protrude towards the center line of the clutch ring, a plurality of rotary cylinder blind holes are arranged on the circumferential outer wall of the intermediate rotary cylinder, which correspond to a plurality of clutch ring protrusions respectively, a plurality of second compression springs are arranged in a plurality of rotary cylinder blind holes, one end of the second compression spring is in contact with one end of the corresponding clutch ring protrusion, the other end of the second compression spring is in contact with the end hole wall of the rotary cylinder blind hole away from the transmission ring, a plurality of rotary cylinder clutch holes are uniformly arranged on the circumferential direction of the cylinder wall of the intermediate rotary cylinder, one end of a plurality of rotary cylinder clutch holes corresponds to and communicates with a plurality of rotary cylinder blind holes respectively, the other end of a plurality of rotary cylinder clutch holes extends to the end surface of the intermediate rotary cylinder close to the transmission ring and is open, a plurality of clutch rods are arranged in a plurality of rotary cylinder clutch holes respectively, one end of a plurality of clutch rods is in contact with the other end of a plurality of clutch ring protrusions respectively, the other end of a plurality of clutch rods is close to the disc of the transmission ring and can be in contact with the disc of the transmission ring.

[0012] As preferred, in order to facilitate the installation of the rotary cylinder bearing and the setting of the rotary cylinder blind hole, the middle section of the outer wall of the intermediate rotary cylinder is protruded outward in the circumferential direction to form a rotary cylinder protruding ring, the rotary cylinder protruding ring is located between the two rotary cylinder bearings, the plurality of rotary cylinder blind holes respectively pass through the rotary cylinder protruding ring, and the plurality of rotary cylinder ball grooves are arranged on the outer wall of the rotary cylinder protruding ring.

[0013] As preferred, in order to facilitate better positioning of the clutch rod and prevent the disc of the transmission ring from moving too far in the direction close to the intermediate rotary cylinder, causing disengagement from the first straight tooth ring of the worm gear assembly, a positioning ring is arranged between the intermediate rotary cylinder and the transmission ring, the positioning ring is sleeved on the outer side of the follow-up ring and the friction ring through the central through hole of the positioning ring and does not contact each other, the positioning ring is connected with the corresponding end of the intermediate rotary cylinder, a plurality of positioning ring through holes are arranged on the ring wall of the positioning ring and uniformly distributed in the circumferential direction and axially through, and a plurality of clutch rods respectively pass through the plurality of positioning ring through holes.

[0014] The present application has the following advantages:

[0015] The present application has the following advantages:

[0016] The application adopts the transmission mechanism composed of the worm, the worm gear assembly, the transmission ring, the first compression spring, the follower ring, the friction ring and the hollow main shaft, the driving motor drives the worm to rotate, the worm drives the worm gear assembly to rotate, thereby driving the transmission ring and the follower ring to rotate synchronously, the no-load starting is realized, the transmission ring moves to the direction close to the intermediate rotary cylinder while rotating, the first compression spring extrudes the follower ring, the follower ring extrudes the friction ring, the gradual loading process is realized, the hollow main shaft is driven to rotate synchronously when the friction is large enough, the hollow main shaft drives a plurality of clamping jaws to rotate around the corresponding pin shafts, the clamping function of the workpiece is realized, the clamping jaws, the intermediate rotary cylinder and the clutch mechanism are driven to rotate synchronously after clamping, the rotation of the intermediate rotary cylinder is not limited at this time, so the intermediate rotary cylinder can rotate freely, and the preferred transmission process of no-load starting, gradual loading, clamping and rotary driving is finally realized.

[0017] The application adopts the clamping jaw mechanism composed of a plurality of clamping jaws, a plurality of pull rods, a plurality of pin shafts and a plurality of connecting screws, the clamping jaw mechanism drives the plurality of clamping jaws to rotate to realize the clamping function of the workpiece during the rotation of the hollow main shaft, the intermediate rotary cylinder is driven to rotate synchronously through the connecting structure between the clamping jaw and the hollow main shaft, the connecting screw, the driving screw, the driving disc and the pull rod after clamping, thereby realizing the rotary driving of the workpiece, and finally realizing the driving purpose of clamping and then rotating through one driving motor.

[0018] The application adopts the clutch mechanism composed of the clutch ring, the clutch rod and the second compression spring, when the transmission ring starts to rotate, the clutch ring moves close to the transmission ring under the elastic force of the second compression spring, at this time, the ball is located in the rotary cylinder ball groove and the first base ball groove and not in the second base ball groove, so the intermediate rotary cylinder cannot rotate relative to the base under the action of the ball, after the transmission ring rotates for a certain time, the disc of the transmission ring drives the clutch rod to move to the direction close to the second compression spring to overcome the elastic force of the second compression spring, thereby driving the clutch ring protrusion and the clutch ring to move to the direction close to the clamping jaw mechanism synchronously, until the ball is located in the second base ball groove, at this time, the ball can rotate in the second base ball groove, so the intermediate rotary cylinder can rotate relative to the base, and finally realizing the function of driving the transmission mechanism, the clamping jaw mechanism, the intermediate rotary cylinder and the clutch mechanism to rotate synchronously through the driving motor. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the perspective view of the single-drive double-control type clamping rotary driving mechanism;

[0020] Figure 2 is the perspective view of the base of the single-drive double-control type clamping rotary driving mechanism;

[0021] Figure 3 is the half cutaway perspective view of the single-drive double-control type clamping rotary driving mechanism;

[0022] Figure 4 is the half cutaway perspective view of hollow spindle, clamping jaw mechanism and intermediate rotary cylinder of single drive double control type clamping rotary drive mechanism of the present application;

[0023] Figure 5 is the front view of hollow spindle, clamping jaw mechanism and intermediate rotary cylinder of single drive double control type clamping rotary drive mechanism of the present application;

[0024] Figure 6 is the perspective view of worm wheel assembly of single drive double control type clamping rotary drive mechanism of the present application;

[0025] Figure 7 is the perspective view of transmission ring of single drive double control type clamping rotary drive mechanism of the present application;

[0026] Figure 8 is the perspective view of follow-up ring of single drive double control type clamping rotary drive mechanism of the present application;

[0027] Figure 9 is the perspective view of intermediate rotary cylinder of single drive double control type clamping rotary drive mechanism of the present application;

[0028] Figure 10 is the perspective view of clutch ring of single drive double control type clamping rotary drive mechanism of the present application. DETAILED DESCRIPTION

[0029] The present application is further described below in conjunction with the accompanying drawings:

[0030] As Figures 1-10As shown, the single-drive double-control clamping rotary drive mechanism of the present application comprises a base 1, a drive motor 5, a clamping jaw mechanism, a transmission mechanism, a clutch mechanism and an intermediate rotary cylinder 10, the base 1 is provided with a base through hole (not marked in the figure) with a circular radial section, the drive motor 5 is installed on the outer wall of the base 1, the clamping jaw mechanism is located at one end of the base through hole and can realize clamping function under the rotary drive of the rotating shaft of the drive motor 5 and realize loosening function under the reverse rotary drive of the rotating shaft of the drive motor 5 (this function is the function that the prior art can realize), the intermediate rotary cylinder 10 in the shape of a cylinder is installed in the base through hole and the center lines of the two coincide, the outer wall of the intermediate rotary cylinder 10 is connected with the hole wall of the base through hole through a rotary cylinder bearing 9, the rotary cylinder bearing 9 is a one-way bearing, the transmission mechanism is installed in the base through hole and connected with the rotating shaft of the drive motor 5 and the clamping jaw mechanism respectively, the clamping jaw mechanism is installed at one end of the intermediate rotary cylinder 10, the clutch mechanism is installed in the base through hole and connected with the transmission mechanism and the intermediate rotary cylinder 10 respectively, and the clutch mechanism is used to make the intermediate rotary cylinder 10 unable to rotate relative to the base 1 before the clamping jaw mechanism completes the clamping function and able to rotate relative to the base 1 after the clamping jaw mechanism completes the clamping function.

[0031] As shown, Figures 1-10 The present application also discloses the following more optimized specific structures, which can be combined with one or more of the following specific structures to form a more optimized technical solution according to actual needs.

[0032] In order to realize the preferred transmission process of idle start, gradual loading, driving clamping and rotary drive in sequence, the transmission mechanism comprises a worm 27, a worm gear assembly 20, a transmission ring 19, a first compression spring 18, a follower ring 17, a friction ring 16 and a hollow main shaft 21, the hollow main shaft 21 in the shape of a cylinder is placed in the central through hole 51 of the intermediate rotary cylinder 10 and the center lines of the two coincide, the outer wall of a section of the hollow main shaft 21 close to the first end (left end in Figure 3 and Figure 4 ) of the two ends is connected with the inner wall of the intermediate rotary cylinder 10 through a through hole main shaft bearing 15, the worm gear assembly 20 in the shape of a circular ring, the transmission ring 19 in the shape of a circular ring, the follower ring 17 in the shape of a circular ring and the friction ring 16 in the shape of a circular ring are all sleeved in the hollow main shaft 21 close to the second end (right end in Figure 3 and Figure 4The outer wall of the transmission ring 19 is provided with a plurality of blind holes 46, and the outer wall of the follower ring 17 is provided with a plurality of blind holes 47. The ends of the plurality of first compression springs 18 are respectively arranged in the plurality of blind holes 47 and the plurality of blind holes 46. The center through hole of the friction ring 16 is in close contact with the outer wall of the hollow spindle 21. One side of the annular surface of the friction ring 16 is close to the side of the follower ring 17 away from the transmission ring 19. The other side of the annular surface of the friction ring 16 is in close contact with the annular stepped surface protruding outward on the outer wall of the hollow spindle 21. The first end of the hollow spindle 21 is close to the jaw mechanism and connected with the jaw mechanism.

[0033] In order to realize reliable clamping function of workpiece (not shown in the figure) and drive intermediate rotary cylinder 10 synchronous rotation, the claw mechanism includes a plurality of claws 3, a plurality of pull rods 28, a plurality of pin shafts 29, a plurality of connecting screws (not marked in the figure), a plurality of drive screws 4 and a drive disc 2, the claw 3 is isosceles triangle (also can be isosceles triangle) and its two base angles one end is large, with its top angle one end is small, the large end of the plurality of claws 3 is respectively connected with one end of the plurality of pull rods 28 through the plurality of pin shafts 29, the other end of the plurality of pull rods 28 is respectively and uniformly installed on the corresponding ring-shaped end of the intermediate rotary cylinder 10, the small end of the plurality of claws 3 is close to the center line of the intermediate rotary cylinder 10 and surrounds a circular clamping hole 33 together, the plurality of connecting screws are respectively located in the gap between the plurality of pull rods 28 and the large end of the plurality of claws 3 and are respectively connected with the first end ring-shaped end surface of the hollow spindle 21, the plurality of drive screws 4 are respectively connected with the drive disc 2 and the large end screw hole of the plurality of connecting screws, the plurality of claws 3 are located between the drive disc 2 and the first end of the hollow spindle 21, the claw 3 is provided with an outer convex claw protruding strip 13 on the side surface close to the hollow spindle 21, a plurality of spindle grooves (not marked in the figure) are uniformly arranged on the first end ring-shaped end surface of the hollow spindle 21 along the circumferential direction, the plurality of claw protruding strips 13 are respectively arranged in the plurality of spindle grooves and can be blocked by the groove wall of the spindle groove after sliding a circular arc distance in the spindle groove.

[0034] To facilitate the cooperation with the transmission mechanism to achieve the function that the intermediate rotary cylinder 10 cannot rotate relative to the base 1 before the clamping jaw mechanism completes the clamping function and can rotate relative to the base 1 after the clamping jaw mechanism completes the clamping function, the clutch mechanism includes a clutch ring 12, a clutch rod 26 and a second compression spring 23. The circular ring-shaped clutch ring 12 is sleeved on the outside of the intermediate rotary cylinder 10 through the central through hole 52 thereof and is located in the base through hole. A plurality of radial clutch ring through holes (not labeled in the figure) are uniformly arranged on the ring wall of the clutch ring 12 in the circumferential direction. A ball 11 is installed in each of the clutch ring through holes. The outer diameter of the ball 11 is greater than the axial length of the clutch ring through hole. A plurality of rotary cylinder ball grooves 31 that are uniformly distributed in the circumferential direction and are strip-shaped in the axial direction of the intermediate rotary cylinder 10 are arranged on the circumferential outer wall of the intermediate rotary cylinder 10 at positions corresponding to the plurality of balls 11 on the clutch ring 12. A plurality of first base ball grooves 7 that are uniformly distributed in the circumferential direction and are strip-shaped in the axial direction of the base through hole are arranged on the hole wall of the base through hole at positions corresponding to the plurality of balls 11 on the clutch ring 12. A plurality of second base ball grooves 6 in the circumferential direction are arranged on the hole wall of the base through hole at positions corresponding to the plurality of balls 11 on the clutch ring 12. The circular second base ball grooves 6 respectively intersect the middle sections of the plurality of first base ball grooves 7. The plurality of balls 11 on the clutch ring 12 are respectively and simultaneously located in the plurality of rotary cylinder ball grooves 31 and the plurality of first base ball grooves 7. A plurality of clutch ring protrusions 25 that are uniformly distributed in the circumferential direction and protrude towards the center line of the clutch ring are arranged on the circumferential inner wall of the clutch ring 12. Radial rotary cylinder blind holes 24 are respectively arranged on the circumferential outer wall of the intermediate rotary cylinder 10 at positions corresponding to the plurality of clutch ring protrusions 25. The plurality of clutch ring protrusions 25 are respectively located in the plurality of rotary cylinder blind holes 24. The plurality of second compression springs 23 are located in the plurality of rotary cylinder blind holes 24. One end of the second compression spring 23 is in contact with one end of the corresponding clutch ring protrusion 25. The other end of the second compression spring 23 is in contact with the end hole wall of the rotary cylinder blind hole 24 away from the transmission ring 19. A plurality of axial rotary cylinder clutch holes 50 are uniformly arranged on the cylinder wall of the intermediate rotary cylinder 10 in the circumferential direction. One end of the plurality of rotary cylinder clutch holes 50 corresponds to and communicates with the plurality of rotary cylinder blind holes 24. The other end of the plurality of rotary cylinder clutch holes 50 extends to the end surface of the intermediate rotary cylinder 10 close to the transmission ring 19 and is open. The plurality of clutch rods 26 are respectively located in the plurality of rotary cylinder clutch holes 50. One end of the plurality of clutch rods 26 is respectively in contact with the other end of the plurality of clutch ring protrusions 25. The other end of the plurality of clutch rods 26 is close to the disc 39 of the transmission ring 19 and can be in contact with the disc 39 of the transmission ring 19.

[0035] In order to facilitate the installation of the rotary drum bearing 9 and the arrangement of the rotary drum blind hole 24, the middle section of the intermediate rotary drum 10 is outwardly convex to form a rotary drum convex ring 30, which is located between the two rotary drum bearings 9, and the plurality of rotary drum blind holes 24 respectively pass through the rotary drum convex ring 30, and the plurality of rotary drum ball grooves 31 are arranged on the outer wall of the rotary drum convex ring 30.

[0036] In order to facilitate the better positioning of the clutch rod 26 and prevent the disc 39 of the transmission ring 19 from moving too far towards the intermediate rotary drum 10, causing the first straight tooth ring 36 of the worm gear assembly 20 to disengage, a circular positioning ring 14 is arranged between the intermediate rotary drum 10 and the transmission ring 19, the positioning ring 14 is sleeved on the outer side of the follower ring 17 and the friction ring 16 through the central through hole, and the positioning ring 14 is connected with the corresponding end of the intermediate rotary drum 10, a plurality of positioning ring through holes (not marked in the figure) are arranged on the ring wall of the positioning ring 14, which are uniformly distributed in the circumferential direction and axially through, and the plurality of clutch rods 26 respectively pass through the plurality of positioning ring through holes.

[0037] Figure 2 It is also shown that the worm 27 passes through the through hole 8 connected with the rotating shaft of the driving motor 5, which is a conventional adaptive structure.

[0038] As Figures 1-10As shown, when in use, one end of a workpiece (not shown in the figure) is first placed in the clamping hole 33 surrounded by the plurality of clamping jaws 3, and then the drive motor 5 is started to rotate the worm 27, which drives the worm gear assembly 20 to rotate, thereby driving the transmission ring 19 and the follower ring 17 to rotate synchronously, achieving no-load start. At the same time, the clutch ring 12 is close to the transmission ring 19 under the elastic force of the second compression spring 23, and the ball 11 is located in the rotary cylinder ball groove 31 and the first base ball groove 7 at the same time and is not located in the second base ball groove 6, so that the intermediate rotary cylinder 10 cannot rotate relative to the base 1 under the action of the ball 11. Under the action of the threaded connection structure between the transmission ring 19 and the hollow main shaft 21, the transmission ring 19 rotates while moving towards the intermediate rotary cylinder 10, and the first compression spring 18 is pressed against the follower ring 17, and the follower ring 17 is pressed against the friction ring 16, achieving a gradual loading process. Finally, when the friction is large enough, the hollow main shaft 21 is driven to rotate synchronously. After the transmission ring 19 rotates for a certain period of time, the disc 39 of the transmission ring 19 pushes the clutch rod 26 to move towards the second compression spring 23 against the elastic force of the second compression spring 23, driving the clutch ring protrusion 25 and the clutch ring 12 to move towards the clamping jaw mechanism, until the ball 11 is located in the second base ball groove 6. At this time, the ball 11 can rotate in the second base ball groove 6, so that the intermediate rotary cylinder 10 can rotate relative to the base 1. At the same time, the hollow main shaft 21 drives the plurality of clamping jaws 3 to rotate around the corresponding pin shaft 29, the clamping hole 33 shrinks and becomes smaller, achieving the clamping function of the workpiece. After clamping, the intermediate rotary cylinder 10 is driven to rotate synchronously by the connection structure between the clamping jaw 3 and the hollow main shaft 21, the connecting screw, the drive screw 4, the drive disc 2 and the pull rod 28, thereby achieving the purpose of rotating the workpiece. Finally, the function of driving the transmission mechanism, the clamping jaw mechanism, the intermediate rotary cylinder 10 and the clutch mechanism to rotate synchronously by the drive motor 5 is achieved.

[0039] After the work is completed, the workpiece needs to be removed. At this time, the drive motor 5 is reversed to rotate. Since the rotary cylinder bearing 9 is a one-way bearing, the intermediate rotary cylinder 10 cannot rotate relative to the base 1 at this time. Correspondingly, the pull rod 28, the drive disc 2, the connecting screw and the drive screw 4 cannot rotate. At this time, the clamping jaw 3 can rotate in the opposite direction around the corresponding pin shaft 29, so that the clamping hole 33 increases and the workpiece is loosened, and the workpiece can be removed. At the same time, under the action of the threaded connection structure between the transmission ring 19 and the hollow main shaft 21, the transmission ring 19 rotates in the opposite direction while moving away from the intermediate rotary cylinder 10, loosening the compression of the follower ring 17 and the friction ring 16, achieving a gradual unloading process. Finally, when the friction is small enough, the hollow main shaft 21 is separated from the transmission ring 19, and the hollow main shaft 21 stops rotating, and the entire mechanism returns to its original state.

[0040] The above embodiments are only the preferred embodiments of the present application, and are not intended to limit the technical solutions of the present application, and any technical solutions that can be realized on the basis of the above embodiments without creative labor shall be considered to fall within the protection scope of the present application patent.

Claims

1. A single-drive, dual-control, clamping and rotating drive mechanism, comprising a base, a drive motor, and a clamping mechanism, wherein the base is provided with a base through-hole having a circular radial cross-section, the drive motor is mounted on an outer wall of the base, the clamping mechanism is located at one end of the base through-hole and is capable of performing a clamping function when driven by the rotating shaft of the drive motor and a releasing function when driven by the reverse rotation of the rotating shaft of the drive motor, characterized in that: The single-drive dual-control clamping rotation drive mechanism also includes a transmission mechanism, a clutch mechanism and an intermediate rotating cylinder. The cylindrical intermediate rotating cylinder is installed in the base through hole and the center lines of the two coincide with each other. The outer wall of the intermediate rotating cylinder is connected to the hole wall of the base through hole through a rotating cylinder bearing. The rotating cylinder bearing is a one-way bearing. The transmission mechanism is installed in the base through hole and is respectively connected to the rotating shaft of the drive motor and the clamping mechanism. The clamping mechanism is installed at one end of the intermediate rotating cylinder. The clutch mechanism is installed in the base through hole and is respectively connected to the transmission mechanism and the intermediate rotating cylinder. The clutch mechanism is used to prevent the intermediate rotating cylinder from rotating relative to the base before the clamping mechanism completes the clamping function and to enable it to rotate relative to the base after the clamping mechanism completes the clamping function.

2. The single-drive dual-control clamping and rotating drive mechanism according to claim 1, characterized in that: The transmission mechanism includes a worm, a worm gear assembly, a transmission ring, a first compression spring, a follower ring, a friction ring and a hollow main shaft. The cylindrical hollow main shaft is placed in the central through hole of the intermediate rotating cylinder and the center lines of the two coincide with each other. A section of the outer wall of the hollow main shaft near the first end of the two ends is connected to the through-hole main shaft bearing between the inner wall of the intermediate rotating cylinder. The annular worm gear assembly, the annular transmission ring, the annular follower ring and the annular friction ring are all sleeved on a section of the outer wall of the hollow main shaft near the second end of the two ends through their own central through holes and are arranged in parallel in the axial direction. The worm gear assembly includes a worm gear ring and a first spur gear ring arranged in parallel and integrally formed. A plurality of protrusions are evenly provided on the circumferential outer wall of the worm gear ring. The worm gear is meshed with the worm gear on the worm through the multiple worm gears, and the worm gear is installed in the base through hole through a worm bearing and its axial direction is perpendicular to the axial direction of the base through hole. One end of the worm gear passes through the corresponding through hole on the hole wall of the base through hole and is connected to the rotating shaft of the drive motor. A plurality of outwardly protruding strip-shaped straight teeth are evenly provided on the circumferential outer wall of the first spur gear ring, and the strip-shaped straight teeth are parallel to the axial direction of the central through hole of the worm gear assembly. The central through hole of the worm gear assembly is connected to the outer wall of the hollow main shaft through a worm gear assembly bearing. The transmission ring includes a disc extending in the radial peripheral direction, and a second spur gear ring and a third spur gear ring are respectively provided on both axial sides of the disc near the central through hole. The second spur gear ring A plurality of bar-shaped straight teeth protruding toward the center line are evenly provided on the inner circumferential wall, and a plurality of outward-protruding bar-shaped straight teeth are evenly provided on the outer circumferential wall of the third straight gear ring. The bar-shaped straight teeth of the second straight gear ring and the bar-shaped straight teeth of the third straight gear ring are both parallel to the axial direction of the central through hole of the transmission ring. The second straight gear ring is sleeved on the outside of the first straight gear ring and the bar-shaped straight teeth of the second straight gear ring are meshed with the bar-shaped straight teeth of the first straight gear ring. An internal thread is provided on the inner circumferential wall of the third straight gear ring, and an external thread is provided on the outer wall of the hollow main shaft at a position corresponding to the third straight gear ring and is connected to the internal thread of the third straight gear ring through the external thread. A plurality of bar-shaped straight teeth protruding toward the center line are evenly provided on the inner circumferential wall of the follower ring, and the bar-shaped straight teeth of the second straight gear ring and the third straight gear ring are parallel to the axial direction of the central through hole of the transmission ring. The second straight gear ring is sleeved on the outside of the first straight gear ring and the bar-shaped straight teeth of the second straight gear ring are meshed with the bar-shaped straight teeth of the first straight gear ring. The straight teeth are axially parallel to the central through hole of the follower ring, and the follower ring is sleeved on the outside of the third straight tooth ring through its own central through hole, and the bar-shaped straight teeth of the follower ring are meshed and connected with the bar-shaped straight teeth of the third straight tooth ring. A plurality of follower ring blind holes are evenly provided on the annular surface of the follower ring close to the transmission ring, and a plurality of transmission ring blind holes are evenly provided on the surface of the disk of the transmission ring close to the follower ring along the circumferential direction. The two ends of the plurality of first compression springs are respectively placed in the plurality of follower ring blind holes and the plurality of transmission ring blind holes. The wall of the central through hole of the friction ring is in close contact with the circumferential outer wall of the hollow main shaft, and the annular surface of one side of the friction ring is close to the side of the follower ring away from the transmission ring.The annular surface on the other side of the friction ring is in close contact with the outwardly convex annular step surface on the circumferential outer wall of the hollow main shaft, and the first end of the hollow main shaft is close to the clamping mechanism and connected to the clamping mechanism.

3. The single-drive dual-control clamping and rotating drive mechanism according to claim 2, characterized in that: The clamping mechanism includes multiple clamping jaws, multiple pull rods, multiple pins, multiple connecting screws, multiple driving screws and driving disks. The clamping jaws are in the shape of an isosceles triangle or a quasi-isosceles triangle with one end of its two bottom angles as the large end and one end of its top angle as the small end. The large ends of the multiple clamping jaws are respectively rotatably connected to one end of the multiple pull rods through the multiple pins, and the other ends of the multiple pull rods are respectively and evenly installed on the corresponding annular ends of the intermediate rotating cylinder. The small ends of the multiple clamping jaws are all close to the center line of the intermediate rotating cylinder and together surround a circular clamping hole. The multiple connecting screws are respectively located between the multiple pull rods and the multiple The gaps between the large ends of the clamping jaws are respectively connected to the circular end faces of the first end of the hollow main shaft, and the plurality of driving screws are respectively connected to the large end screw holes of the driving disk and the plurality of connecting screws. The plurality of clamping jaws are located between the driving disk and the first end of the hollow main shaft, and the surface of the clamping jaw close to the hollow main shaft is provided with an outwardly protruding clamping jaw ridge. The circular end face of the first end of the hollow main shaft is evenly provided with a plurality of main shaft grooves along the circumferential direction, and the plurality of clamping jaw ridges are respectively placed in the plurality of main shaft grooves and can be blocked by the groove wall of the main shaft groove after sliding a circular arc distance in the main shaft groove.

4. The single-drive dual-control clamping and rotating drive mechanism according to claim 2 or 3, characterized in that: The clutch mechanism includes a clutch ring, a clutch rod and a second compression spring. The annular clutch ring is sleeved on the outside of the intermediate rotating cylinder through its own central through hole and is located in the base through hole. A plurality of radial clutch ring through holes are evenly arranged on the ring wall of the clutch ring along the circumferential direction. A ball is installed in each of the clutch ring through holes. The outer diameter of the ball is greater than the axial length of the clutch ring through hole. A plurality of rotating cylinder ball grooves are evenly distributed along the circumferential direction and are strip-shaped in the axial direction of the intermediate rotating cylinder at positions corresponding to the plurality of balls on the clutch ring. A plurality of first base ball grooves are uniformly distributed in the circumferential direction and are strip-shaped in the axial direction of the base through hole at positions corresponding to the plurality of balls on the clutch ring on the hole wall of the base through hole; a second base ball groove is provided in the circumferential direction at positions corresponding to the plurality of balls on the clutch ring on the hole wall of the base through hole; the circular second base ball grooves intersect with the middle sections of the plurality of first base ball grooves respectively; the plurality of balls on the clutch ring are respectively placed in the plurality of rotating drum ball grooves and the plurality of first base ball grooves at the same time; the circumferential inner wall of the clutch ring is provided with A plurality of clutch ring protrusions are evenly distributed along the circumferential direction and protrude toward the center line of the clutch ring. Radial rotary drum blind holes are respectively provided at positions corresponding to the plurality of clutch ring protrusions on the circumferential outer wall of the intermediate rotary drum. The plurality of clutch ring protrusions are respectively placed in the plurality of rotary drum blind holes. The axial direction of the second compression spring is the same as the axial direction of the intermediate rotary drum. The plurality of second compression springs are placed in the plurality of rotary drum blind holes. One end of the second compression spring contacts one end of the corresponding clutch ring protrusion, and the other end of the second compression spring contacts one end of the rotary drum blind hole away from the transmission ring. The hole wall contacts, a plurality of axial rotating drum clutch holes are evenly provided on the cylinder wall of the intermediate rotating drum along the circumferential direction, one end of the plurality of rotating drum clutch holes corresponds to and communicates with the plurality of rotating drum blind holes one by one, the other end of the plurality of rotating drum clutch holes extends to the surface of one end of the intermediate rotating drum close to the transmission ring and opens, a plurality of clutch rods are respectively placed in the plurality of rotating drum clutch holes, one end of the plurality of clutch rods respectively contacts the other end of the plurality of clutch ring protrusions, and the other end of the plurality of clutch rods is close to the disk of the transmission ring and can contact the disk of the transmission ring.

5. The single-drive dual-control clamping and rotating drive mechanism according to claim 4, characterized in that: The middle section of the circumferential outer wall of the intermediate rotating drum protrudes toward the outer circumference to form a rotating drum convex ring. The rotating drum convex ring is located between the two rotating drum bearings. A plurality of rotating drum blind holes respectively pass through the rotating drum convex rings. A plurality of rotating drum ball grooves are provided on the outer wall of the rotating drum convex ring.

6. The single-drive dual-control clamping and rotating drive mechanism according to claim 4, characterized in that: A circular positioning ring is provided between the intermediate rotating cylinder and the transmission ring. The positioning ring is sleeved on the outside of the follower ring and the friction ring through its own central through hole without contacting each other. The positioning ring is connected to the corresponding end of the intermediate rotating cylinder. The ring wall of the positioning ring is provided with a plurality of positioning ring through holes that are evenly distributed along the circumferential direction and axially penetrated. The plurality of clutch rods respectively pass through the plurality of positioning ring through holes.

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