A turnover screwing device and an automatic clamping turnover tool thereof

Abstract

The present application relates to tooling fixture technical field, especially to a kind of turnover screwing equipment and its automatic clamping turnover tool, comprising: mounting bracket;Clamping arm assembly includes sliding pivot, rotary transmission assembly, support arm and jaw;First drive component is used to drive two support arms to move towards, to clamp workpiece;Second drive component is connected with two rotary transmission assemblies, to synchronously drive jaw to overturn;Linkage assembly is also provided between two clamping arm assemblies, linkage assembly includes adjusting plate and two adjusting rods;The middle articulation of adjusting plate is arranged on mounting bracket, two adjusting rods are respectively articulated at the two ends of adjusting plate, and the end away from adjusting plate is respectively articulated on the clamping arm assembly of corresponding side;Two adjusting rods act on adjusting plate, to realize the linkage of two clamping arm assemblies, make two sides clamping arm synchronous response, ensure the movement stability between two clamping arms, effectively avoid the risk of workpiece falling, improve the reliability of clamping.

Description

Technical Field

[0001] This invention relates to the field of tooling and fixture technology, and in particular to a screw-driving flipping device and its automatic clamping and flipping tooling. Background Technology

[0002] The cylinder body is generally a multi-faceted part, requiring the clamping of the cylinder body to simultaneously drive the rotation of two clamping arms to achieve machining of the workpiece on multiple surfaces. However, since the two clamping arms are controlled to move by separate drive components during the clamping process, it is difficult to ensure the synchronous response of the clamping arms, resulting in insufficient clamping on one side. During the flipping process, the workpiece is prone to falling off. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a screw-driving flipping device and its automatic clamping flipping fixture, which effectively solves the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: an automatic clamping and flipping fixture, comprising: Mounting rack; Two clamping arm assemblies are disposed opposite to each other on the mounting bracket. Each clamping arm assembly includes a sliding shaft, a rotary transmission component, a support arm, and a pawl, which are sequentially disposed on the sliding shaft along the clamping direction. The sliding shaft is rotatably disposed within the support arm, and the pawl is fixed to the end of the sliding shaft away from the rotary transmission component. The sliding shaft is axially slidably disposed inside the rotary transmission component. The first drive assembly is disposed on the mounting frame and is used to drive the two support arms to move toward each other so as to drive the two jaws to clamp the workpiece. The second drive assembly is mounted on the mounting bracket and connected to the two rotary transmission assemblies to synchronously drive the pawl on the sliding shaft to rotate. A linkage assembly is provided between the two clamping arm assemblies. The linkage assembly includes an adjusting plate and two adjusting rods. The middle of the adjusting plate is hinged to the mounting bracket. The two adjusting rods are respectively hinged to both ends of the adjusting plate, and the ends away from the adjusting plate are respectively hinged to the clamping arm assemblies on the corresponding sides. The two adjusting rods are diagonally arranged at the hinge points of the two clamping arm assemblies. When the first driving component drives the two clamping arm assemblies to move, the two adjusting rods will act on the adjusting plate to realize the linkage of the two clamping arm assemblies.

[0005] Furthermore, the mounting bracket includes a base, two sliding members disposed on the base, and a fixed bracket disposed on the two sliding members; The fixed bracket includes two connecting plates corresponding to the two sliding members, and a fixed plate perpendicular to the two connecting plates; The fixing plate includes a base plate, a front plate and two side plates disposed on the base plate, two clamping arm assemblies disposed on the front plate, and a second drive assembly disposed between the two side plates and connected to the two rotary transmission assemblies.

[0006] Furthermore, the rotary transmission assembly includes a support base and a sleeve rotatably disposed within the support base; Furthermore, the inner hole of the sleeve has at least one plane along the axial direction, and the sliding shaft has a bearing surface at one end of the sleeve that matches the plane.

[0007] Furthermore, the first drive assembly includes a sliding guide, a positioning plate, a first cylinder, and a second cylinder; The sliding guide is arranged along the clamping direction and includes two guide rods located in the same vertical plane and two slides slidably arranged on the two guide rods. The positioning plate is arranged between the two slides. The two clamping arm assemblies are respectively mounted on the corresponding slides. The first cylinder and the second cylinder are mounted back to back on the positioning plate. Their drive rods drive the two slides to move in opposite directions, so that the support arm drives the sliding shaft to slide, thereby realizing the clamping action of the two jaws.

[0008] Furthermore, a limiting member is provided on the sliding trajectory of the slide table, and a fixed groove for the limiting member to be embedded is provided on the side of the slide table near the mounting bracket; When the slide moves to the set clamping position, the limiting member extends into the fixed groove to lock the slide.

[0009] Furthermore, the second drive assembly includes a drive motor, a drive shaft, and two synchronous belt sets; the two synchronous belt sets are disposed at both ends of the drive shaft; The synchronous belt set includes a driving pulley and a driven pulley. The driving pulley is mounted on the driving shaft, and the driven pulley is mounted on the sleeve. The drive motor drives the driving shaft to rotate, and drives the two sleeves to rotate synchronously through the two synchronous belt sets, thereby causing the two chucks to rotate synchronously.

[0010] Furthermore, the sliding shaft includes a rotating shaft segment and a sliding shaft segment; The rotating shaft section is provided with a first bearing assembly, and a locking nut is provided at the end of the first bearing assembly away from the chuck. A second bearing assembly is provided on the sleeve located on the sliding shaft section, and retaining rings are provided at both ends of the second bearing assembly.

[0011] Furthermore, the support arm includes a sliding plate and a cantilever disposed on the sliding plate; A plate is provided on the four side walls along the circumferential direction at the end of the cantilever away from the sliding plate, and a bead hole is provided on the plate located on one side of the claw. A positioning bead is provided on the claw to cooperate with the bead hole.

[0012] Furthermore, the adjusting rod includes a middle rod and two fisheye connectors, the two fisheye connectors being screwed to both ends of the middle rod; During the movement of the two clamping arm assemblies, the lengths of the two adjusting rods are equal.

[0013] The present invention also provides a screw-driving flipping device, including the aforementioned automatic clamping and flipping fixture; And a push assembly disposed below the clamping and flipping fixture, used to lift the cylinder to be clamped between the two clamping arm assemblies; The press assembly and reaction arm bracket are disposed above the clamping and flipping fixture. The press assembly presses the parts inside the cylinder, and the reaction arm bracket is used to screw the assembled surfaces after press-fitting.

[0014] The beneficial effects of the present invention are as follows: The first driving component and the second driving component in the present invention can synchronously control the clamping and flipping actions of the two clamping arm assemblies, ensure the force balance between the two clamping arms, effectively ensure a more uniform force distribution during flipping and clamping, and through the setting of the linkage component, enable the clamping arms on both sides to respond synchronously, ensure the stability of the movement between the two clamping arms, effectively avoid the risk of workpiece falling, and improve the reliability of clamping. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a first-view structural diagram of the automatic clamping and flipping fixture in an embodiment of the present invention; Figure 2 This is a second-view structural diagram of the automatic clamping and flipping fixture in an embodiment of the present invention; Figure 3 This is a top view of the automatic clamping and flipping fixture in an embodiment of the present invention; Figure 4 for Figure 3 AA section view; Figure 5 This is a schematic diagram of the structure of the first drive component and the clamping arm assembly in an embodiment of the present invention; Figure 6 This is a schematic diagram showing the installation positions of the slide and the limiting member in an embodiment of the present invention; Figure 7 This is an exploded view of the rotary transmission assembly in an embodiment of the present invention; Figure 8 This is an exploded view of the support arm structure in an embodiment of the present invention; Figure 9 This is a schematic diagram illustrating the fit between the positioning bead and the positioning bead hole in an embodiment of the present invention; Figure 10 This is a schematic diagram of the screw-driving device in an embodiment of the present invention.

[0017] Reference numerals: 1. Mounting bracket; 11. Base; 12. Sliding component; 13. Fixed bracket; 131. Connecting plate; 132. Fixed plate; 2. Clamping arm assembly; 21. Sliding shaft; 211. Rotating shaft segment; 212. Sliding shaft segment; 22. Rotary transmission assembly; 221. Support base; 222. Sleeve; 23. Support arm; 231. Sliding plate; 232. Cantilever; 233. Plate; 23a. Positioning bead hole; 23b. Positioning bead; 24. Claw; 3. First Drive assembly; 31, sliding guide; 311, guide rod; 312, slide table; 312a, fixed slot; 32, positioning plate; 33, first cylinder; 34, second cylinder; 35, limiting component; 4, second drive assembly; 41, drive motor; 42, drive shaft; 43, synchronous belt group; 5, linkage assembly; 51, adjusting plate; 52, adjusting rod; 100, automatic clamping and flipping fixture; 200, pushing assembly; 300, press assembly; 400, reaction arm bracket. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] like Figures 1 to 9 An automatic clamping and flipping fixture 100 is shown, comprising: a mounting frame 1, two clamping arm assemblies 2, a first drive assembly 3, and a second drive assembly 4. The two clamping arm assemblies 2 are disposed opposite to each other on the mounting frame 1. Each clamping arm assembly 2 includes a sliding shaft 21, and a rotary transmission assembly 22, a support arm 23, and a jaw 24 sequentially disposed on the sliding shaft 21 along the clamping direction. The sliding shaft 21 is rotatably disposed within the support arm 23, and the jaw 24 is fixed at the end of the sliding shaft 21 away from the rotary transmission assembly 22. The sliding shaft 21 is axially slidably disposed within the rotary transmission assembly 22. The first drive assembly 3 is disposed on the mounting frame 1 and is used to drive the two support arms 23 to move toward each other, thereby driving the two jaws 24 to clamp the workpiece. The second drive assembly 4 is disposed on the mounting frame 1 and is connected to the two rotary transmission assemblies 22 to synchronously drive the jaws 24 on the sliding shaft 21 to flip. A linkage component 5 is provided between the two clamping arm assemblies 2. The linkage component 5 includes an adjusting plate 51 and two adjusting rods 52. The middle of the adjusting plate 51 is hinged to the mounting frame 1. The two adjusting rods 52 are respectively hinged to both ends of the adjusting plate 51, and the ends away from the adjusting plate 51 are respectively hinged to the corresponding clamping arm assemblies 2. The two adjusting rods 52 are diagonally arranged at the hinge points of the two clamping arm assemblies 2. When the first driving component 3 drives the two clamping arm assemblies 2 to move, the two adjusting rods 52 will act on the adjusting plate 51 to realize the linkage of the two clamping arm assemblies 2.

[0022] In this invention, when the workpiece moves between the two clamping arm assemblies 2, the first drive assembly 3 is activated to drive the two support arms 23 to move towards each other. When the first drive assembly 3 drives the two clamping arm assemblies 2 to perform a clamping action, the two adjusting rods 52 act on the adjusting plate 51 to make the adjusting plate 51 rotate counterclockwise, thereby realizing the linkage clamping of the two clamping arm assemblies 2 and ensuring the synchronicity of the clamping of the workpiece by the two jaws 24. After the clamping action is completed, the second drive assembly 4 is activated to drive the sliding shaft 21 to rotate, thereby realizing the flipping of multiple machined surfaces on the workpiece between the two jaws 24. In addition, during the moving clamping process, the first drive assembly 3 and the second drive assembly 4 are activated simultaneously, which can synchronously control the jaws 24 on the two sliding shafts 21 to rotate during the clamping process, so as to adjust to a suitable clamping position, thereby ensuring the reliability of the clamping. The first driving component 3 and the second driving component 4 in this invention can synchronously control the clamping and flipping actions of the two clamping arm assemblies 2, ensuring force balance between the two clamping arms, effectively ensuring a more uniform force distribution during flipping and clamping, and through the setting of the linkage component 5, the clamping arms on both sides respond synchronously, ensuring stable movement between the two clamping arms, effectively avoiding the risk of workpiece falling, and improving the reliability of clamping.

[0023] In a preferred embodiment of the present invention, the mounting frame 1 includes a base 11, two sliding members 12 disposed on the base 11, and a fixed bracket 13 disposed on the two sliding members 12. The base 11 provides the basic structure of the entire device, and through the sliding members 12 and the fixed bracket 13, the movement stability of the device and the workpiece clamping force can be ensured, thereby improving the accuracy and stability of the device. Specifically, the fixed bracket 13 includes two connecting plates 131 disposed corresponding to the two sliding members 12, and a fixed plate 132 disposed perpendicular to the two connecting plates 131. Further, the fixed plate 132 includes a base plate, a front plate and two side plates disposed on the base plate, two clamping arm assemblies 2 disposed on the front plate, and a second drive assembly 4 disposed between the two side plates and connected to two rotary transmission assemblies 22. By setting the base plate perpendicular to the front plate and the side plates perpendicularly disposed on the base plate and the front plate, the overall structural strength of the fixed plate 132 is enhanced. At the same time, by using the second drive assembly 4 to synchronously drive the two rotary transmission assemblies 22, the synchronicity and accuracy of the clamping and flipping operations can be ensured.

[0024] In addition, in this solution, the rotary transmission assembly 22 includes a support base 221 and a sleeve 222 rotatably disposed within the support base 221; and the inner hole of the sleeve 222 has at least one plane along the axial direction, and the sliding shaft 21 has a bearing surface matching the plane at one end of the sleeve 222. Preferably, the sliding shaft 21 has two parallel bearing surfaces, and the sleeve 222 has a through hole matching the sliding shaft 21. The sliding shaft 21 is limited within the sleeve 222 by the contact between the plane and the bearing surface. When the second drive assembly 4 drives the sleeve 222 to rotate, it achieves synchronous rotation with the sleeve 222. At the same time, under the action of the first drive assembly 3 and the planar structure, the sliding shaft 21 can slide along the axial direction, ensuring the reliability of the clamping force.

[0025] In a preferred embodiment of the present invention, the first driving assembly 3 includes a sliding guide 31, a positioning plate 32, a first cylinder 33, and a second cylinder 34. The sliding guide 31 is arranged along the clamping direction and includes two guide rods 311 located in the same vertical plane and two slides 312 slidably arranged on the two guide rods 311. The positioning plate 32 is arranged between the two slides 312. The two clamping arm assemblies 2 are respectively arranged on the corresponding slides 312. The first cylinder 33 and the second cylinder 34 are arranged back to back on the positioning plate 32. Their driving rods drive the two slides 312 to move in opposite directions, so that the support arm 23 drives the sliding shaft 21 to slide, thereby realizing the clamping action of the two claws 24.

[0026] By setting two guide rods 311, the two slides 312 can move along the same axis. Under the action of the first cylinder 33 and the second cylinder 34 on the positioning plate 32, the clamping process can be completed automatically, and the positions of the two clamping arm assemblies 2 are precisely positioned, thereby ensuring the accuracy and stability of workpiece clamping.

[0027] As a preferred embodiment of the above, in order to avoid the risk of the clamping arm falling due to displacement during the flipping process, a limiting member 35 is provided on the sliding trajectory of the slide table 312, and a fixed groove 312a for the limiting member 35 to be inserted is provided on the side of the slide table 312 near the mounting frame 1; when the slide table 312 moves to the set clamping position, the limiting member 35 extends into the fixed groove 312a to lock the slide table 312, preventing the slide table 312 from moving or loosening unexpectedly during operation, and ensuring the reliability of the clamping arm position.

[0028] In this invention, the second drive assembly 4 includes a drive motor 41, a drive shaft 42, and two synchronous belt sets 43. The two synchronous belt sets 43 are disposed at both ends of the drive shaft 42. Each synchronous belt set 43 includes a drive pulley and a driven pulley. The drive pulley is disposed on the drive shaft 42, and the driven pulley is disposed on the sleeve 222. The drive motor 41 drives the drive shaft 42 to rotate, and through the two synchronous belt sets 43, drives the two sleeves 222 to rotate synchronously, thereby causing the two jaws 24 to rotate synchronously. By setting the synchronous belt sets 43, energy loss is reduced, while ensuring that the two sleeves 222 rotate synchronously, thus making the clamping action of the two jaws 24 completely synchronized, improving the accuracy and stability of clamping. In addition, an idler pulley is provided on the side near the driving pulley, which effectively reduces the speed difference between the driving pulley and the driven pulley in the synchronous belt set 43, thereby reducing the slippage and loss of the synchronous belt and improving the transmission efficiency. At the same time, the idler pulley can also balance the tension and lateral forces in the synchronous belt set 43, reducing the lateral forces and pressures on the driving pulley and the driven pulley, which helps to extend the service life of the synchronous belt and the rollers.

[0029] In a preferred embodiment of the present invention, the sliding shaft 21 includes a rotating shaft section 211 and a sliding shaft section 212; the sliding function and the rotation function are separated. This separation design can reduce mutual interference and friction between the sliding component and the rotating component. A first bearing assembly is provided on the rotating shaft section 211, and a locking nut is provided at the end of the first bearing assembly away from the pawl 24; a second bearing assembly is provided on the sleeve 222 located on the sliding shaft section 212, and retaining springs are provided at both ends of the second bearing assembly. Specifically, the first bearing assembly is located on the rotating shaft section 211 and is fixed by the locking nut, which can provide support and fixation for the rotating shaft section 211, increasing the stability and rigidity of the system. At the same time, the second bearing assembly is located on the sliding shaft section 212, and retaining springs are fixed at both ends, which can support and fix the sliding shaft section 212, ensuring its stability and accuracy during the sliding process.

[0030] In a preferred embodiment of the present invention, the support arm 23 includes a sliding plate 231 and a cantilever 232 disposed on the sliding plate 231. The cantilever 232 is disposed on the outer edge of the sliding plate 231, and the distance from the cantilever 232 to the inner edge is sufficient to form a clamping space between the two cantilever 232s. A mounting plate 233 is provided on the circumferential sidewalls of the end of the cantilever 232 away from the sliding plate 231, which can increase the support and fixation of the claw 24, thereby improving the stability and accuracy of the system. Furthermore, the mounting plate 233 can provide support in the circumferential direction. The additional support area, along with the positioning bead 23b, fixes the position and angle of the chuck 24, preventing instability such as shaking or swaying during operation. A bead hole 23a is provided on the plate 233 on one side of the chuck 24, and a positioning bead 23b that mates with the bead hole 23a is provided on the chuck 24. This allows for accurate positioning and fixation of the chuck 24. The bead hole 23a ensures that the relative position and angle between the chuck 24 and the plate 233 remain constant, thus guaranteeing the stability and accuracy of the system.

[0031] Furthermore, in the preferred embodiment, the adjusting rod 52 includes a central rod and two fisheye connectors, which are screwed to both ends of the central rod. During the movement of the two clamping arm assemblies 2, the lengths of the two adjusting rods 52 are equal. This effectively avoids tilting of the clamping arm assembly 2 or uneven clamping force, thereby ensuring a smoother and more precise movement and clamping process of the clamping arm assembly 2.

[0032] like Figure 10 As shown, the present invention also provides a screw-driving flipping device, including an automatic clamping flipping fixture 100; And a push assembly 200 located below the clamping and flipping fixture, used to lift the cylinder to be clamped between the two clamping arm assemblies 2; The press assembly 300 and the reaction arm bracket 400 are set above the clamping and flipping fixture. The press assembly 300 presses the parts inside the cylinder, and the reaction arm bracket 400 is used to screw the assembled surfaces after press-fitting.

[0033] By setting up clamping and flipping fixtures, push assembly 200, press assembly 300 and reaction arm support 400, one-stop processing can be achieved, saving processing time, reducing intermediate links and improving production efficiency.

[0034] Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An automatic clamping and flipping fixture, characterized in that, include: Mounting rack; Two clamping arm assemblies are disposed opposite to each other on the mounting bracket. Each clamping arm assembly includes a sliding shaft, a rotary transmission component, a support arm, and a pawl, which are sequentially disposed on the sliding shaft along the clamping direction. The sliding shaft is rotatably disposed within the support arm, and the pawl is fixed to the end of the sliding shaft away from the rotary transmission component. The sliding shaft is axially slidably disposed inside the rotary transmission component. The first drive assembly is mounted on the mounting bracket and is used to drive the two support arms to move toward each other. The support arms drive the sliding shaft to slide, so as to drive the two jaws to clamp the workpiece. The second drive assembly is mounted on the mounting bracket and connected to the two rotary transmission assemblies to synchronously drive the pawl on the sliding shaft to rotate. A linkage assembly is provided between the two clamping arm assemblies. The linkage assembly includes an adjusting plate and two adjusting rods. The middle of the adjusting plate is hinged to the mounting bracket. The two adjusting rods are respectively hinged to both ends of the adjusting plate, and the ends away from the adjusting plate are respectively hinged to the clamping arm assemblies on the corresponding sides. The two adjusting rods are diagonally arranged at the hinge points of the two clamping arm assemblies. When the first driving component drives the two clamping arm assemblies to move, the two adjusting rods will act on the adjusting plate to realize the linkage of the two clamping arm assemblies.

2. The automatic clamping and flipping fixture according to claim 1, characterized in that, The mounting bracket includes a base, two sliding members disposed on the base, and a fixed bracket disposed on the two sliding members; The fixed bracket includes two connecting plates corresponding to the two sliding members, and a fixed plate perpendicular to the two connecting plates; The fixing plate includes a base plate, a front plate and two side plates disposed on the base plate, two clamping arm assemblies disposed on the front plate, and a second drive assembly disposed between the two side plates and connected to the two rotary transmission assemblies.

3. The automatic clamping and flipping fixture according to claim 1, characterized in that, The rotary transmission assembly includes a support base and a sleeve rotatably disposed within the support base; Furthermore, the inner hole of the sleeve has at least one plane along the axial direction, and the sliding shaft has a bearing surface at one end of the sleeve that matches the plane.

4. The automatic clamping and flipping fixture according to claim 1, characterized in that, The first drive assembly includes a sliding guide, a positioning plate, a first cylinder, and a second cylinder; The sliding guide is arranged along the clamping direction and includes two guide rods located in the same vertical plane and two slides slidably arranged on the two guide rods. The positioning plate is arranged between the two slides. The two clamping arm assemblies are respectively mounted on the corresponding slides. The first cylinder and the second cylinder are mounted back to back on the positioning plate. Their drive rods drive the two slides to move in opposite directions, so that the support arm drives the sliding shaft to slide, thereby realizing the clamping action of the two jaws.

5. The automatic clamping and flipping fixture according to claim 4, characterized in that, A limiting member is provided on the sliding trajectory of the slide table, and a fixed groove for the limiting member to be embedded is provided on the side of the slide table near the mounting frame; When the slide moves to the set clamping position, the limiting member extends into the fixed groove to lock the slide.

6. The automatic clamping and flipping fixture according to claim 3, characterized in that, The second drive assembly includes a drive motor, a drive shaft, and two synchronous belt sets; the two synchronous belt sets are disposed at both ends of the drive shaft; The synchronous belt set includes a driving pulley and a driven pulley. The driving pulley is mounted on the driving shaft, and the driven pulley is mounted on the sleeve. The drive motor drives the driving shaft to rotate, and drives the two sleeves to rotate synchronously through the two synchronous belt sets, thereby causing the two chucks to rotate synchronously.

7. The automatic clamping and flipping fixture according to claim 3, characterized in that, The sliding shaft includes a rotating shaft section and a sliding shaft section; The rotating shaft section is provided with a first bearing assembly, and a locking nut is provided at the end of the first bearing assembly away from the chuck. A second bearing assembly is provided on the sleeve located on the sliding shaft section, and retaining rings are provided at both ends of the second bearing assembly.

8. The automatic clamping and flipping fixture according to claim 1, characterized in that, The support arm includes a sliding plate and a cantilever mounted on the sliding plate; A plate is provided on the four side walls along the circumferential direction at the end of the cantilever away from the sliding plate, and a bead hole is provided on the plate located on one side of the claw. A positioning bead is provided on the claw to cooperate with the bead hole.

9. The automatic clamping and flipping fixture according to claim 1, characterized in that, The adjusting rod includes a middle rod and two fisheye connectors, and the two fisheye connectors are screwed to both ends of the middle rod. During the movement of the two clamping arm assemblies, the lengths of the two adjusting rods are equal.

10. A screw-driving flipping device, characterized in that, Includes the automatic clamping and flipping fixture as described in any one of claims 1-9; And a push assembly disposed below the clamping and flipping fixture, used to lift the cylinder to be clamped between the two clamping arm assemblies; The press assembly and reaction arm bracket are disposed above the clamping and flipping fixture. The press assembly presses the parts inside the cylinder, and the reaction arm bracket is used to screw the assembled surfaces after press-fitting.

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