Automatic Tightening Device for Diesel Engine Connecting Bolts

Abstract

The present invention discloses an automatic tightening device for diesel engine connecting bolts, which relates to the technical field of automatic bolt tightening. It includes a first linear module. A buffer correction member is provided on the outer wall of the tightening sleeve, and a centering clamping member is installed on the inner wall of the tightening sleeve on the side of the inclined surface series away from the bolt tightening head. By setting the buffer correction member in the present invention, when one end of the bolt tightening head fails to insert into the cross notch of the bolt, at this time, the bolt tightening head will push the bolt to move a certain distance, and then the bolt tightening head rotates to turn to a position aligned with the cross notch of the bolt, so as to accurately insert the bolt tightening head into the cross notch of the bolt. As the bolt tightening head continues to rotate and move, the arc-shaped baffle moves in a direction away from the center of the inclined surface series after moving a certain distance, thus preventing the bolt from tilting during the process of being screwed into the threaded hole and improving the accuracy of the bolt inserted into the threaded hole.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic bolt tightening, and specifically to an automatic tightening device for diesel engine connecting bolts. Background Art

[0002] The automatic bolt tightening machine is an important auxiliary device on the diesel engine assembly line. The existing automatic bolt tightening machine includes a tightening gun, a bolt tightening head installed at the output end of the tightening gun, a tightening sleeve installed at one end of the tightening gun, and a moving module for adjusting the position of the tightening gun.

[0003] Generally, when tightening a bolt, the tightening gun drives the bolt tightening head to move. During this process, if the opening of the bolt tightening head is not aligned with the cross-notch on the nut, the bolt will move when the bolt tightening head contacts the bolt, and one end of the tightening sleeve will be squeezed open by the nut when the bolt moves. In this way, the bolt cannot be limited during tightening, resulting in the bolt tilting when being screwed into the threaded hole, thus affecting the tightening effect of the bolt. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic tightening device for diesel engine connecting bolts to solve the problem of bolt deviation during tightening caused by misalignment of the bolt tightening head.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An automatic tightening device for diesel engine connecting bolts includes a first linear module. A second linear module is arranged on the top of the first linear module. A mounting seat is installed on the top of the second linear module. A tightening gun is arranged on the mounting seat. A tightening sleeve is installed at one end of the tightening gun. The output end of the tightening gun is connected to a bolt tightening head located inside the tightening sleeve. A bolt delivery pipe is installed on the outer wall of the tightening sleeve. An inclined surface linkage is fixedly installed on the inner wall of the tightening sleeve. A buffer correction member is arranged on the outer wall of the tightening sleeve. The outer wall of the tightening sleeve is connected through the buffer correction member to an arc-shaped baffle located inside the inclined surface linkage. A centering clamping member is installed on the inner wall of the tightening sleeve on the side of the inclined surface linkage away from the bolt tightening head.

[0006] As a further solution of the present invention: The buffer correction member includes a frustum connecting pipe installed outside the bolt tightening head. One end of the frustum connecting pipe away from the tightening sleeve is connected to a positioning sleeve. A water storage chamber is installed on the outer wall of the tightening sleeve. A first extrusion rod extending to the inner side of the tightening sleeve is inserted into the water storage chamber. One end of the first extrusion rod is installed with an extrusion plate located inside the water storage chamber. On one side of the extrusion plate, a second return spring connected to the inner wall of the water storage chamber is provided. The side of the water storage chamber away from the tightening sleeve is connected to a connecting pipe. A connecting chamber is installed on the outer wall of the end of the tightening sleeve away from the tightening gun. One end of the connecting chamber is provided with a sleeve connecting cylinder connected to the connecting pipe. A piston rod extending to the inner side of the connecting chamber is inserted into the sleeve connecting cylinder. A guide rod is installed inside the connecting chamber. A movable block is movably sleeved on the guide rod. A sleeve block is provided on the top of the movable block. On one side of the movable block, a first return spring connected to the inner wall of the connecting chamber and located outside the guide rod is provided. An insertion plate connected to the arc-shaped baffle is inserted into the sleeve block. One end of the insertion plate is provided with a limit post penetrating the sleeve block. Inclined guiding grooves and horizontal guiding grooves are formed on the inner wall of the connecting chamber. The limit post is slidably connected to the connecting chamber through the inclined guiding grooves and the horizontal guiding grooves.

[0007] As a further solution of the present invention: A ball is rotatably connected to one end of the arc-shaped baffle close to the bolt tightening head through a bearing. The center of the arc-shaped baffle is coaxial with the center of the inclined surface linkage.

[0008] As a further solution of the present invention: Chutes matching the limit posts are provided at the top and bottom of the sleeve block. The widths of the inclined guiding grooves and the horizontal guiding grooves are equal to the diameter of the limit post.

[0009] As a further solution of the present invention: The internal space of the water storage chamber is equal to the internal space of the sleeve connecting cylinder.

[0010] As a further solution of the present invention: The centering clamping member includes a mounting bracket installed at the top of the tightening sleeve and on the side of the bolt delivery pipe away from the tightening gun. A micro cylinder is installed at the top of the mounting bracket. The output end of the micro cylinder is connected to a U-shaped straight rack. Both sides of the tightening sleeve are rotatably connected to a transmission coupling shaft extending to the inside of the tightening sleeve. One end of the transmission coupling shaft located outside the tightening sleeve is installed with a first straight gear meshing with the U-shaped straight rack. One end of the transmission coupling shaft located inside the tightening sleeve is installed with an eccentric connecting pin. A clamping ring is installed on the inner wall of the tightening sleeve. One end of the clamping ring close to the inclined surface connecting ring is rotatably connected to a swing frame through a rotating shaft. A second straight gear is arranged inside the swing frame. A guide wheel is arranged at one end of the swing frame away from the second straight gear. A T-shaped insertion rod is inserted into the clamping ring. One end of the T-shaped insertion rod is provided with a shifting rack meshing with the second straight gear. One end of the clamping ring away from the inclined surface connecting ring is provided with a movable ring connected to the T-shaped insertion rod. The T-shaped insertion rod penetrates through the movable ring. A straight connection groove is opened at one end of the T-shaped insertion rod away from the shifting rack. The eccentric connecting pin is slidably connected to the T-shaped insertion rod through the straight connection groove. A protective bin is arranged on the outer wall of the tightening sleeve and below the bolt delivery pipe. The bottom of the protective bin is inserted with a second extrusion rod extending to the inside of the tightening sleeve. A moving contact piece is installed at the top of the second extrusion rod and inside the protective bin. A third return spring connected to the inner wall of the protective bin is arranged at the bottom of the moving contact piece. A static contact piece is installed on the inner wall of the protective bin and above the moving contact piece. A shifting contact piece is installed at one end of the sleeve block away from the insertion plate. A long strip contact piece in contact with the shifting contact piece is installed on the inner wall of the connection bin. An annular groove is opened on the outer side of one end of the bolt tightening head close to the bolt delivery pipe.

[0011] As a further solution of the present invention: The moving contact piece and the shifting contact piece are electrically connected through a wire. The long strip contact piece is electrically connected to the micro cylinder through a wire. The protective bin is electrically connected to an external power supply through a wire. The length of the long strip contact piece is equal to that of the inclined guiding groove.

[0012] As a further solution of the present invention: The center of the eccentric connecting pin and the center of the transmission coupling shaft are in a misaligned state. The width of the straight connection groove is the same as the diameter of the eccentric connecting pin.

[0013] As a further solution of the present invention: The number of the swing frames is multiple, and the multiple swing frames are equidistantly distributed along the center of the clamping ring.

[0014] As a further solution of the present invention: The diameter of the movable ring is the same as that of the clamping ring. The inner diameter of the inclined surface connecting ring is larger than the inner diameter of the movable ring.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. By setting a buffer correction component, when one end of the bolt tightening head is not inserted into the cross-notch of the bolt, the bolt tightening head will then push the bolt to move a certain distance. Subsequently, by rotating the bolt tightening head, the bolt tightening head can be rotated to a position aligned with the cross-notch of the bolt, so as to accurately insert the bolt tightening head into the cross-notch of the bolt. As the bolt tightening head continues to rotate and move, the arc-shaped baffle moves a certain distance and then moves away from the center of the inclined surface linkage circle. In this way, the arc-shaped baffle loses the limit on the bolt, so that the bolt loses the limit after being screwed into the threaded hole by a certain length. In this way, it can prevent the bolt from tilting during the process of being screwed into the threaded hole, and improve the accuracy of inserting the bolt into the threaded hole;

[0017] 2. By setting a centering clamping component, when the bolt tightening head moves towards the bolt in the tightening sleeve, the second extrusion rod will move upward under the guidance of the annular groove. At this time, the moving contact piece contacts the static contact piece, so that the micro cylinder can be energized and extended. At this time, the U-shaped straight rack will drive the first straight gear to rotate, so that the eccentric connecting pin drives the T-shaped insertion rod to move towards the swing frame, so that the shifting rack drives the swing frame to swing through the second straight gear, so as to clamp and limit one end of the bolt by the swing frame, making the central axis of the bolt align with the central axes of the inclined surface linkage and the bolt tightening head. In this way, the accuracy of the butt joint between the bolt tightening head and the bolt can be improved, and the bolt tightening quality can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a structural schematic diagram of the present invention;

[0019] Figure 2 is a schematic diagram of the internal structure of the tightening sleeve of the present invention;

[0020] Figure 3 is of the present invention Figure 2 enlarged view at A in;

[0021] Figure 4 is a connection schematic diagram of the water storage tank and the connection tank of the present invention;

[0022] Figure 5 is a schematic diagram of the internal structure of the connection tank of the present invention;

[0023] Figure 6 is a connection schematic diagram of the connection tank and the sleeve block of the present invention;

[0024] Figure 7 is a schematic diagram of the internal structure of the water storage tank of the present invention;

[0025] Figure 8 is a connection schematic diagram of the movable ring and the clamping ring of the present invention;

[0026] Figure 9 Schematic diagram of the connection between the T-shaped insertion rod and the transmission coupling shaft of the present invention.

[0027] In the figure: 1. First linear module; 2. Second linear module; 3. Mounting seat; 4. Tightening gun; 5. Tightening sleeve; 6. Bolt delivery pipe; 701. Water storage bin; 702. Connecting pipe; 703. Sleeve cylinder; 704. Connecting bin; 705. Frustum connecting pipe; 706. Positioning sleeve; 707. First extrusion rod; 708. Inclined surface link; 709. Arc baffle; 710. Insertion plate; 711. Sleeve block; 712. First return spring; 713. Guide rod; 714. Horizontal guide groove; 715. Inclined guide groove; 716. Movable block; 717. Limit post; 718. Piston rod; 719. Extrusion plate; 720. Second return spring; 801. First spur gear; 802. Mounting frame; 803. Protection bin; 804. U-shaped spur rack; 805. Micro cylinder; 806. Moving contact; 807. Static contact; 808. Third return spring; 809. Annular groove; 810. Second extrusion rod; 811. Long strip contact; 812. Shifting contact; 813. Movable ring; 814. T-shaped insertion rod; 815. Second spur gear; 816. Guide wheel; 817. Swing frame; 818. Shifting rack; 819. Transmission coupling shaft; 820. Direct connection groove; 821. Eccentric connecting pin; 822. Clamping ring; 9. Bolt tightening head. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following describes the embodiments according to the overall structure of the present invention.

[0030] Please refer to Figures 1 to 9 , in the embodiment of the present invention, an automatic tightening device for diesel engine connecting bolts includes a first linear module 1. A second linear module 2 is provided on the top of the first linear module 1. A mounting seat 3 is installed on the top of the second linear module 2. A tightening gun 4 is provided on the mounting seat 3. A tightening sleeve 5 is installed at one end of the tightening gun 4. A bolt tightening head 9 located inside the tightening sleeve 5 is connected to the output end of the tightening gun 4. A bolt conveying pipe 6 is installed on the outer wall of the tightening sleeve 5. An inclined surface series 708 is fixedly installed on the inner wall of the tightening sleeve 5. A buffer correction member is provided on the outer wall of the tightening sleeve 5. An arc-shaped baffle 709 located inside the inclined surface series 708 is connected to the outer wall of the tightening sleeve 5 through the buffer correction member. A centering clamping member is installed on the inner wall of the tightening sleeve 5 on the side of the inclined surface series 708 away from the bolt tightening head 9.

[0031] In this embodiment, when assembling the diesel engine, the tightening sleeve 5 is aligned with the threaded hole on the diesel engine through the cooperation of the first linear module 1 and the second linear module 2. Subsequently, the bolt is conveyed to the inside of the tightening sleeve 5 through the bolt conveying pipe 6, so that the bolt moves to the inside of the inclined surface linkage 708. The tightening gun 4 is started, and the movement of the bolt tightening head 9 driven by the tightening gun 4 is used to clamp and correct the bolt inside the inclined surface linkage 708 by the centering clamping member, so that the center of the bolt is aligned with the center of the inclined surface linkage 708, thereby aligning the bolt tightening head 9 with the bolt, and improving the accuracy of the butt joint between the bolt tightening head 9 and the bolt. When one end of the bolt tightening head 9 does not insert into the cross notch of the bolt, at this time, when the bolt tightening head 9 contacts the bolt, the buffer correction member is used to buffer the bolt. Then, as the tightening gun 4 drives the rotation of the bolt tightening head 9, the bolt tightening head 9 rotates to a position aligned with the cross notch of the bolt, thereby realizing the connection between the bolt tightening head 9 and the bolt. As the bolt tightening head 9 continues to rotate and move, part of the bolt will be screwed into the threaded hole. At this time, the centering clamping member loses the positioning and clamping of the bolt, and at the same time, the arc-shaped baffle 709 loses the shielding of the bolt under the action of the buffer correction member. Then, the bolt tightening head 9 continues to rotate and move to screw the bolt into the threaded hole. In this way, the bolt loses support after being screwed into the threaded hole, thereby preventing the bolt from tilting during the process of being screwed into the threaded hole and enhancing the tightening effect of the bolt.

[0032] Please refer specifically to Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7, the buffer correction member includes a frustum-shaped connecting pipe 705 installed outside the bolt tightening head 9. One end of the frustum-shaped connecting pipe 705 away from the tightening sleeve 5 is connected to a positioning sleeve 706. A water storage chamber 701 is installed on the outer wall of the tightening sleeve 5. A first extrusion rod 707 extending to the inside of the tightening sleeve 5 is inserted into the water storage chamber 701. One end of the first extrusion rod 707 is installed with an extrusion plate 719 located inside the water storage chamber 701. A second return spring 720 connected to the inner wall of the water storage chamber 701 is arranged on one side of the extrusion plate 719. A connecting pipe 702 is connected to the side of the water storage chamber 701 away from the tightening sleeve 5. A connecting chamber 704 is installed on the outer wall of the end of the tightening sleeve 5 away from the tightening gun 4. A sleeve 703 connected to the connecting pipe 702 is arranged at one end of the connecting chamber 704. A piston rod 718 extending to the inside of the connecting chamber 704 is inserted into the sleeve 703. A guide rod 713 is installed inside the connecting chamber 704. A movable block 716 is movably sleeved on the guide rod 713. A sleeve block 711 is arranged at the top of the movable block 716. A first return spring 712 connected to the inner wall of the connecting chamber 704 and located outside the guide rod 713 is arranged on one side of the movable block 716. An insertion plate 710 connected to the arc-shaped baffle 709 is inserted into the sleeve block 711. A limit post 717 penetrating the sleeve block 711 is arranged at one end of the insertion plate 710. An inclined guiding groove 715 and a horizontal guiding groove 714 are formed on the inner wall of the connecting chamber 704. The limit post 717 is slidably connected to the connecting chamber 704 through the inclined guiding groove 715 and the horizontal guiding groove 714.

[0033] In this embodiment, when the bolt tightening head 9 moves towards the inclined surface linkage 708, the frustum connecting pipe 705 moves along with the movement of the bolt tightening head 9. In this way, the bolt tightening head 9 can first come into contact with the bolt. When one end of the bolt tightening head 9 does not insert into the cross-notch of the bolt, the bolt tightening head 9 will then push the bolt to move a certain distance. At this time, the first return spring 712 contracts. Subsequently, by rotating the bolt tightening head 9, the bolt tightening head 9 is rotated to a position aligned with the cross-notch of the bolt. At this time, the arc-shaped baffle 709 will drive the bolt to move towards the bolt tightening head 9 under the action of the elastic restoring force of the first return spring 712, so as to accurately insert the bolt tightening head 9 into the cross-notch of the bolt. As the bolt tightening head 9 continues to rotate and move, the frustum connecting pipe 705 will then squeeze the first extrusion rod 707, causing the extrusion plate 719 to squeeze the solution inside the water storage chamber 701. In this way, the aqueous solution inside the water storage chamber 701 enters the sleeve cylinder 703 through the connecting pipe 702, so as to cause the piston rod 718 to push the sleeve block 711. At this time, the bolt will be screwed into the threaded hole under the action of the rotation and movement of the bolt tightening head 9. When the limit post 717 moves to the inside of the horizontal guiding groove 714, the limit post 717 will drive the insertion plate 710 to retract into the sleeve block 711 under the guiding action of the horizontal guiding groove 714, so as to cause the arc-shaped baffle 709 to move away from the center of the inclined surface linkage 708. In this way, the arc-shaped baffle 709 will lose the limit on the bolt. After that, when the bolt tightening head 9 moves, the positioning sleeve 706 contacts the first extrusion rod 707. At this time, by continuing to rotate and move the bolt tightening head 9, the bolt can be completely screwed into the threaded hole, so that the bolt loses the limit after being screwed into the threaded hole by a certain length. In this way, it can prevent the bolt from tilting during the process of being screwed into the threaded hole, and improve the accuracy of inserting the bolt into the threaded hole.

[0034] Please refer specifically to Figure 2 、 Figure 4 , a ball is rotatably connected to one end of the arc-shaped baffle 709 close to the bolt tightening head 9 through a bearing, and the center of the arc-shaped baffle 709 is coaxial with the center of the inclined surface linkage 708.

[0035] In this embodiment, by setting this structure, the friction between the bolt and the arc-shaped baffle 709 when they are separated is reduced, and the service life of the equipment is improved.

[0036] Please refer specifically to Figure 5 、 Figure 6 , chutes that fit the limit posts 717 are provided at the top and bottom of the sleeve block 711, and the widths of the inclined guiding groove 715 and the horizontal guiding groove 714 are equal to the diameter of the limit posts 717.

[0037] In this embodiment, when the movable block 716 is moved by setting this structure, the limit post 717 first drives the arc-shaped baffle 709 to move horizontally, and then drives the arc-shaped baffle 709 to move away from the center of the inclined surface linkage 708, so that the bolt loses support after being screwed into the threaded hole for a certain length.

[0038] Please refer particularly to Figure 6 , Figure 7 , the internal space of the water storage bin 701 is equal to the internal space of the sleeve tube 703.

[0039] In this embodiment, when the first pressing rod 707 contacts the positioning sleeve 706 and the aqueous solution inside the water storage bin 701 completely enters the sleeve tube 703, the piston rod 718 is fully extended, so as to prevent the arc-shaped baffle 709 from retracting into the connection bin 704 when the subsequent bolt tightening head 9 moves.

[0040] Please refer particularly to Figure 2 , Figure 3 , Figure 6 , Figure 8 , Figure 9, the center clamping member includes a mounting bracket 802 installed at the top of the tightening sleeve 5 and on the side of the bolt delivery pipe 6 away from the tightening gun 4. A micro cylinder 805 is installed at the top of the mounting bracket 802. The output end of the micro cylinder 805 is connected to a U-shaped straight rack 804. Both sides of the tightening sleeve 5 are rotatably connected to a transmission coupling shaft 819 extending to the inside of the tightening sleeve 5. One end of the transmission coupling shaft 819 located outside the tightening sleeve 5 is installed with a first spur gear 801 meshing with the U-shaped straight rack 804. One end of the transmission coupling shaft 819 located inside the tightening sleeve 5 is installed with an eccentric connecting pin 821. A clamping ring 822 is installed on the inner wall of the tightening sleeve 5. One end of the clamping ring 822 close to the inclined surface connecting ring 708 is rotatably connected to a swing frame 817 through a rotating shaft. A second spur gear 815 is arranged inside the swing frame 817. A guide wheel 816 is arranged at one end of the swing frame 817 away from the second spur gear 815. A T-shaped insertion rod 814 is inserted into the clamping ring 822. One end of the T-shaped insertion rod 814 is provided with a shifting rack 818 meshing with the second spur gear 815. One end of the clamping ring 822 away from the inclined surface connecting ring 708 is provided with a movable ring 813 connected to the T-shaped insertion rod 814. The T-shaped insertion rod 814 penetrates through the movable ring 813. A straight connection groove 820 is opened at one end of the T-shaped insertion rod 814 away from the shifting rack 818. The eccentric connecting pin 821 is slidably connected to the T-shaped insertion rod 814 through the straight connection groove 820. A protective chamber 803 is arranged on the outer wall of the tightening sleeve 5 and below the bolt delivery pipe 6. A second extrusion rod 810 extending to the inside of the tightening sleeve 5 is inserted into the bottom of the protective chamber 803. A moving contact piece 806 located inside the protective chamber 803 is installed at the top of the second extrusion rod 810. A third return spring 808 connecting the inner wall of the protective chamber 803 is arranged at the bottom of the moving contact piece 806. A static contact piece 807 is installed on the inner wall of the protective chamber 803 above the moving contact piece 806. A shifting contact piece 812 is installed at one end of the sleeve block 711 away from the insertion plate 710. A strip-shaped contact piece 811 contacting the shifting contact piece 812 is installed on the inner wall of the connection chamber 704. An annular groove 809 is opened on the outer side of one end of the bolt tightening head 9 close to the bolt delivery pipe 6.

[0041] In this embodiment, when the bolt tightening head 9 moves towards the bolt inside the tightening sleeve 5, the second pressing rod 810 will move upward under the guidance of the annular groove 809. At this time, the moving contact piece 806 contacts the static contact piece 807, so that the micro cylinder 805 can be energized and extended. At this time, the U-shaped straight rack 804 will drive the first straight gear 801 to rotate, so that the eccentric connecting pin 821 drives the T-shaped insertion rod 814 to move towards the swing frame 817, so that the shifting rack 818 drives the swing frame 817 to swing through the second straight gear 815, so as to clamp and limit one end of the bolt by the swing frame 817, so that the central axis of the bolt is aligned with the inclined surface connecting ring 708 and the central axis of the bolt tightening head 9, so as to improve the accuracy of the butt joint between the bolt tightening head 9 and the bolt, further improve the bolt tightening quality, and at the same time, the swing frame 817 also limits the bolt. When the arc-shaped baffle 709 moves towards the connecting bin 704, the displacement contact piece 812 is separated from the long strip contact piece 811. At this time, the micro cylinder 805 is powered off and restored, so as to restore the swing frame 817, so that the swing frame 817 loses the clamping and limiting of the bolt. After that, the bolt can pass through the clamping ring 822 and the movable ring 813 under the action of the rotation and movement of the bolt tightening head 9.

[0042] Please refer particularly to Figure 2 , Figure 3 , Figure 6 , Figure 8 , the moving contact piece 806 and the displacement contact piece 812 are electrically connected through a wire, the long strip contact piece 811 is electrically connected to the micro cylinder 805 through a wire, the protective bin 803 is electrically connected to an external power supply through a wire, and the length of the long strip contact piece 811 is equal to that of the inclined guiding groove 715.

[0043] In this embodiment, by setting this structure, when the static contact piece 807 contacts the moving contact piece 806 and the displacement contact piece 812 contacts the long strip contact piece 811, the micro cylinder 805 is energized and operates, so as to control the operation timing of the micro cylinder 805.

[0044] Please refer particularly to Figure 9 , the center of the eccentric connecting pin 821 and the center of the transmission connecting shaft 819 are in a misaligned state, and the width of the straight connecting groove 820 is the same as the diameter of the eccentric connecting pin 821.

[0045] In this embodiment, by setting this structure, when the transmission connecting shaft 819 rotates, the eccentric connecting pin 821 drives the movable ring 813 to move horizontally.

[0046] Please refer particularly to Figure 8 , the number of swing frames 817 is set to be multiple, and the multiple swing frames 817 are equidistantly distributed along the center of the clamping ring 822.

[0047] In this embodiment, by setting this structure, when the swing frame 817 swings, the bolt is supported and limited in multiple directions, so as to improve the accuracy of the butt joint between the bolt tightening head 9 and the bolt.

[0048] Please refer specifically to Figure 2 , Figure 8 , the diameters of the movable ring 813 and the clamping ring 822 are equal, and the inner diameter of the inclined surface connecting ring 708 is larger than the inner diameter of the movable ring 813.

[0049] In this embodiment, by setting this structure, the movement of the bolt is prevented from being hindered by the movable ring 813 and the clamping ring 822.

[0050] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A diesel engine connecting bolt automatic tightening device, comprising a first linear module (1), characterized in that: A second linear module (2) is arranged on the top of the first linear module (1), a mounting seat (3) is installed on the top of the second linear module (2), a tightening gun (4) is arranged on the mounting seat (3), a tightening sleeve (5) is installed at one end of the tightening gun (4), an output end of the tightening gun (4) is connected to a bolt tightening head (9) located on the inner side of the tightening sleeve (5), a bolt delivery pipe (6) is installed on the outer wall of the tightening sleeve (5), a bevel link (708) is fixedly installed on the inner wall of the tightening sleeve (5), a buffer correction piece is arranged on the outer wall of the tightening sleeve (5), the outer wall of the tightening sleeve (5) is connected to an arc-shaped baffle (709) located on the inner side of the bevel link (708) through the buffer correction piece, and a center clamping piece is installed on the inner wall of the tightening sleeve (5) located on the side of the bevel link (708) away from the bolt tightening head (9); The buffer correction member comprises a truncated cone connecting pipe (705) installed on the outside of the bolt tightening head (9), one end of the truncated cone connecting pipe (705) away from the tightening sleeve (5) is connected to a positioning sleeve (706), the outer wall of the tightening sleeve (5) is installed with a water storage bin (701), the interior of the water storage bin (701) is plugged with a first extrusion rod (707) extending to the inside of the tightening sleeve (5), one end of the first extrusion rod (707) is installed with a positioning sleeve (706) located in the water storage bin (701), and the positioning sleeve (706) is connected to the outer wall of the tightening sleeve (5). 1) an internal squeezing plate (719), one side of the squeezing plate (719) is provided with a second return spring (720) connected to the inner wall of the water storage bin (701), a side of the water storage bin (701) away from the tightening sleeve (5) is connected to a connecting pipe (702), an outer wall of the end of the tightening sleeve (5) away from the tightening gun (4) is provided with a connecting bin (704), one end of the connecting bin (704) is provided with a sleeve connecting tube (703) connected to the connecting pipe (702), The sleeve (703) is internally plugged with a piston rod (718) extending to the inner side of the connecting chamber (704); a guide rod (713) is installed on the inner side of the connecting chamber (704); a movable block (716) is movably sleeved on the guide rod (713); a sleeve block (711) is arranged on the top of the movable block (716); a first reset block (711) is arranged on one side of the movable block (716) and is connected to the inner wall of the connecting chamber (704) and is located on the outer side of the guide rod (713). A spring (712) is provided, a plug plate (710) connected to the arc-shaped baffle (709) is inserted into the interior of the sleeve block (711), a limiting column (717) penetrating the sleeve block (711) is provided at one end of the plug plate (710), an inclined guide groove (715) and a horizontal guide groove (714) are provided on the inner wall of the connecting bin (704), and the limiting column (717) is slidably connected to the connecting bin (704) through the inclined guide groove (715) and the horizontal guide groove (714).

2. The automatic tightening device for connecting bolts of a diesel engine according to claim 1, characterized in that: One end of the arc-shaped baffle (709) close to the bolt tightening head (9) is rotatably connected to a ball via a bearing, and the center of the arc-shaped baffle (709) is coaxial with the center of the inclined link (708).

3. The automatic tightening device for connecting bolts of a diesel engine according to claim 1, characterized in that: The top and bottom of the sleeve block (711) are both provided with sliding grooves that fit with the limiting column (717), and the widths of the inclined guide groove (715) and the horizontal guide groove (714) are equal to the diameter of the limiting column (717).

4. The automatic tightening device for connecting bolts of a diesel engine according to claim 1, characterized in that: The internal space of the water storage bin (701) is equal in size to the internal space of the sleeve (703).

5. The automatic tightening device for connecting bolts of a diesel engine according to claim 1, characterized in that: The center clamping member comprises a mounting frame (802) mounted on the top of the tightening sleeve (5) and located on the side of the bolt delivery pipe (6) away from the tightening gun (4); a micro cylinder (805) is mounted on the top of the mounting frame (802); the output end of the micro cylinder (805) is connected to a U-shaped spur rack (804); both sides of the tightening sleeve (5) are rotatably connected to a transmission shaft (819) extending to the inner side of the tightening sleeve (5); one end of the transmission shaft (819) located on the outer side of the tightening sleeve (5) is mounted with a first spur gear (801) meshing with the U-shaped spur rack (804); the transmission shaft (819) is located on the outer side of the tightening sleeve (5) ) is provided with an eccentric connecting pin (821) at one end on the inner side, a retaining ring (822) is provided on the inner wall of the tightening sleeve (5), one end of the retaining ring (822) close to the inclined link (708) is rotatably connected to a swing frame (817) via a rotating shaft, a second spur gear (815) is provided on the inner side of the swing frame (817), a guide wheel (816) is provided at one end of the swing frame (817) away from the second spur gear (815), a T-shaped plug rod (814) is plugged into the retaining ring (822), one end of the T-shaped plug rod (814) is provided with a shifting rack (818) meshing with the second spur gear (815), and the retaining ring (8 22) A movable ring (813) connected to a T-shaped plug rod (814) is provided at one end away from the inclined link (708), the T-shaped plug rod (814) passes through the movable ring (813), a direct connection groove (820) is provided at one end of the T-shaped plug rod (814) away from the shifting rack (818), an eccentric connecting pin (821) is slidably connected to the T-shaped plug rod (814) through the direct connection groove (820), the outer wall of the tightening sleeve (5) is provided with a protective bin (803) located below the bolt delivery pipe (6), the bottom of the protective bin (803) is plugged with a second extrusion rod (810) extending to the inner side of the tightening sleeve (5), and the second extrusion rod (810) ) is installed at the top of the protective chamber (803) and is located inside the protective chamber (803); the bottom of the movable contact piece (806) is provided with a third return spring (808) connected to the inner wall of the protective chamber (803); the inner wall of the protective chamber (803) is provided with a stationary contact piece (807) located above the movable contact piece (806); the end of the sleeve block (711) away from the plug plate (710) is installed with a shift contact piece (812); the inner wall of the connecting chamber (704) is installed with a long contact piece (811) in contact with the shift contact piece (812); and an annular groove (809) is provided on the outer side of one end of the bolt tightening head (9) close to the bolt conveying pipe (6).

6. The automatic tightening device for connecting bolts of a diesel engine according to claim 5, characterized in that: The movable contact piece (806) is electrically connected to the displacement contact piece (812) via a wire, the long contact piece (811) is electrically connected to the micro cylinder (805) via a wire, the protective compartment (803) is electrically connected to an external power supply via a wire, and the long contact piece (811) is equal in length to the inclined guide groove (715).

7. The automatic tightening device for connecting bolts of a diesel engine according to claim 5, characterized in that: The center of the circle of the eccentric connecting pin (821) is in a misaligned state with the center of the circle of the transmission connecting shaft (819), and the width of the direct connection groove (820) is the same as the diameter of the eccentric connecting pin (821).

8. The diesel engine connecting bolt automatic tightening device according to claim 5, characterized in that: The number of the swing frames (817) is multiple, and the multiple swing frames (817) are distributed at equal distances along the center of the clamping ring (822).

9. The automatic tightening device for connecting bolts of a diesel engine according to claim 5, characterized in that: The movable ring (813) and the locking ring (822) have the same diameter, and the inner wall diameter of the inclined link (708) is larger than the inner wall diameter of the movable ring (813).

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