Automobile assembling bolt tightening machine

Abstract

The invention discloses an automobile assembly bolt tightening machine, which relates to the technical field of automobile production lines and comprises an outer shell, a motor, an angle adjusting mechanism, a transmission sleeve, a tightening mechanism, a connecting shaft, a movable shell, a limiting locking groove, a limiting locking screw, a telescopic shell, a sliding hole and the like. The bolt tightening device has the advantages of being reasonable and simple in structure, low in production cost and convenient to install, a motor and gear transmission combined mode is adopted, the tightening head is effectively driven to work, bolt tightening operation can be stably achieved, the position of the telescopic shell can be conveniently adjusted by unscrewing and screwing the limiting locking screw, and therefore the requirements of different working positions can be flexibly met; the angle adjusting device has an accurate angle adjusting function, the transmission shaft can be accurately controlled to rotate by operating related parts through a unique angle adjusting mechanism and an inner hexagonal tool, then the connecting shaft is driven to rotate through meshing of the bevel gear set to achieve angle adjustment, the angle can be reliably locked after adjustment is completed, and the diversified bolt tightening angle requirements are met.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile production lines, and particularly relates to an automobile assembly bolt tightening machine. Background Art

[0002] With the rapid development of the automobile industry, the output of automobiles has been continuously increasing, and the quality standards have become increasingly stringent. In the automobile assembly process, bolt connection plays a crucial role. After all, many automobile components, such as engines, chassis, and bodies, need to be firmly assembled with the help of bolts. The traditional method of manually tightening bolts by workers has exposed many drawbacks. For example, it is difficult to ensure the consistency of the tightening torque. Different workers have different operating methods and uneven application of force, which easily results in uneven tightening torques of bolts. Excessive torque may damage the bolts and connecting components, while insufficient torque may cause loosening of the connection, posing a safety hazard to the operation of the automobile. At the same time, the existing automobile assembly bolt tightening machines also have obvious deficiencies. Their functions are relatively single, often only capable of performing basic tightening operations, lacking flexibility and adaptability. In particular, most of these tightening machines cannot adjust the tightening length and angle according to actual assembly requirements. When facing automobile components with different specifications and assembly requirements, they cannot flexibly adjust parameters, greatly limiting their application scope and assembly effect in complex automobile assembly processes, and it is difficult to meet the urgent needs of modern automobile industry for high-precision and diversified assembly operations. Summary of the Invention

[0003] The object of the present invention is to provide an automobile assembly bolt tightening machine to solve the problems that the existing automobile assembly bolt tightening machines have simple functions and cannot adjust the length and angle as required.

[0004] To solve the above problems, the present invention provides a technical solution: an automotive assembly bolt tightening machine, comprising a housing, a motor, an angle adjustment mechanism, a driving gear, a driven gear, a transmission sleeve, a tightening mechanism, a connecting shaft, a movable housing, a limit locking groove, a limit locking screw, a telescopic housing, and a sliding hole; the motor is fixedly connected to the inside of the left side of the housing, and a driving gear is fixedly connected to the output shaft on the lower right side of the motor; the sliding hole is horizontally formed in the center of the inside of the right side of the housing, and a limit locking screw is movably connected in a threaded hole provided on the upper right side of the sliding hole; the outside of the left side of the telescopic housing is movably connected to the inside of the sliding hole, and a horizontal limit locking groove is formed on the outside of the upper side of the telescopic housing; the outside of the lower side of the limit locking screw is connected to the inside of the limit locking groove; the outside of the left side of the transmission sleeve is movably connected to the center of the inside of the left side of the sliding hole, a driven gear is fixedly connected to the outside of the left side of the transmission sleeve, and the driven gear is connected to the driving gear, and the outside of the right side of the transmission sleeve is movably connected to the center of the inside of the left side of the telescopic housing; a connecting shaft is fixedly connected to the inside of the left side of the movable housing, and the outside of the connecting shaft is movably connected to the inside of the right side of the telescopic housing; the angle adjustment mechanism is arranged inside the housing and the telescopic housing, and the right side of the angle adjustment mechanism is connected to the connecting shaft; the tightening mechanism is arranged inside the transmission sleeve, the telescopic housing, and the movable housing.

[0005] Preferably, the specific structure of the angle adjustment mechanism includes a first transmission shaft, a first guide hole, a first spring, a second spring, a second guide hole, a slider, an internal hexagonal groove, a movable block, a cone, an inclined hole, a pin, a clamping hole, a first bevel gear, a second bevel gear, a spline shaft, a spline hole sleeve, a third bevel gear and a fourth bevel gear; the first transmission shaft is movably connected to the central inner part of the upper side of the outer housing, and a first bevel gear is fixedly connected to the outer part of the lower side of the first transmission shaft; the first guide hole is vertically arranged in the central inner part of the upper side of the first transmission shaft; the second guide hole is horizontally arranged in the inner part of the upper side of the first transmission shaft; the slider is horizontally movably connected to the inside of the second guide hole, a second spring is arranged between the left side of the slider and the left side surface of the second guide hole, an inclined hole is formed in the central inner part of the slider, and a pin is fixedly connected to the right end of the slider; the outer part of the movable block is horizontally movably connected to the inside of the first guide hole, a first spring is arranged between the bottom surface of the movable block and the bottom surface of the first guide hole, a cone is fixedly connected to the central outer part of the movable block, and the cone is located inside the inclined hole; there are several clamping holes, and several clamping holes are respectively and uniformly formed in the periphery of the central inner part of the upper side of the outer housing; the outside of the pin is respectively connected to the inside of the corresponding clamping hole; the internal hexagonal groove is formed in the central part of the top surface of the first transmission shaft; the left outer part of the spline shaft is movably connected to the central inner part of the left side of the transmission sleeve, a second bevel gear is fixedly connected to the left outer part of the spline shaft, and the second bevel gear is connected to the first bevel gear; the outer part of the spline hole sleeve is movably connected to the central inner part of the left side of the tightening mechanism, a spline hole arranged in the center of the spline hole sleeve is connected to the spline shaft, and a third bevel gear is fixedly connected to the right end of the spline hole sleeve; the fourth bevel gear is fixedly connected to the outer part of the central inner part of the connecting shaft, and the fourth bevel gear is connected to the third bevel gear.

[0006] Preferably, the top surface of the movable block is higher than the bottom surface of the internal hexagonal groove.

[0007] Preferably, a chamfer is arranged at the outer edge of the pin.

[0008] Preferably, the specific structure of the tightening mechanism includes an internal long groove, a movable sleeve, a convex long groove, a first transmission gear, an intermediate gear, a second transmission gear, a second transmission shaft and a tightening head; there are several internal long grooves, and several internal long grooves are respectively horizontally formed in the periphery of the inner wall of the transmission sleeve; several horizontal convex long grooves are arranged on the outer part of the movable sleeve, and the convex long grooves are respectively movably connected to the inner sides of the corresponding internal long grooves, and a first transmission gear is fixedly connected to the right end of the movable sleeve; the intermediate gear is movably connected to the outer part of the connecting shaft, and the left side of the intermediate gear is connected to the first transmission gear; the second transmission shaft is movably connected to the central inner part of the movable housing, a second transmission gear is fixedly connected to the left end of the second transmission shaft, and the second transmission gear is connected to the intermediate gear, and a tightening head is fixedly connected to the right end of the second transmission shaft.

[0009] Preferably, an internal hexagonal hole is formed in the outer part of the right side of the tightening head.

[0010] Preferably, the motor is a brushless motor.

[0011] Preferably, an anti-slip layer is provided on the outer surface of the outer housing.

[0012] Advantages of the present invention: (1) The present invention has the characteristics of reasonable and simple structure, low production cost, and convenient installation. By adopting the combined mode of motor and gear transmission, it effectively drives the tightening head to work, and can stably realize the bolt tightening operation. The position of the telescopic housing can be conveniently adjusted by loosening and tightening the limit locking screw, so as to flexibly adapt to the requirements of different working positions.

[0013] (2) The present invention has an accurate angle adjustment function. By using a unique angle adjustment mechanism and operating relevant components with an inner hexagon tool, the rotation of the transmission shaft can be precisely controlled. Then, the rotation of the connecting shaft is driven by the meshing of the bevel gear set to achieve angle adjustment. After the adjustment is completed, the angle can be reliably locked to meet the diverse bolt tightening angle requirements. Brief Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of the present invention.

[0015] Figure 2 It is Figure 1 a cross-sectional view of

[0016] Figure 3 a schematic structural diagram of the angle adjustment mechanism.

[0017] Figure 4 It is Figure 3 an enlarged view of position A in

[0018] Figure 5 a schematic structural diagram of the tightening mechanism.

[0019] 1 - outer housing; 2 - motor; 3 - angle adjustment mechanism; 4 - driving gear; 5 - driven gear; 6 - transmission sleeve; 7 - tightening mechanism; 8 - connecting shaft; 9 - movable housing; 10 - limit locking groove; 11 - limit locking screw; 12 - telescopic housing; 13 - sliding hole; 31 - transmission shaft one; 32 - guide hole one; 33 - spring one; 34 - spring two; 35 - guide hole two; 36 - slider; 37 - inner hexagon slot; 38 - movable block; 39 - cone; 310 - inclined hole; 311 - pin; 312 - clamping hole; 313 - bevel gear one; 314 - bevel gear two; 315 - spline shaft; 316 - spline hole sleeve; 317 - bevel gear three; 318 - bevel gear four; 71 - inner long groove; 72 - movable sleeve; 73 - convex long groove; 74 - driving gear one; 75 - intermediate gear; 76 - driving gear two; 77 - transmission shaft two; 78 - tightening head. Detailed Embodiments

[0020] AsFigure 1 and Figure 2 As shown in Figure 2 , the following technical solutions are adopted in this specific embodiment: An automobile assembly bolt tightening machine includes a housing 1, a motor 2, an angle adjustment mechanism 3, a driving gear 4, a driven gear 5, a transmission sleeve 6, a tightening mechanism 7, a connecting shaft 8, a movable housing 9, a limit locking groove 10, a limit locking screw 11, a telescopic housing 12, and a sliding hole 13. The motor 2 is fixedly connected to the inside of the left side of the housing 1, and the driving gear 4 is fixedly connected to the output shaft on the lower right side of the motor 2. The sliding hole 13 is horizontally opened in the center of the inside of the right side of the housing 1, and the limit locking screw 11 is movably connected to the threaded hole provided on the upper right side of the sliding hole 13. The outside of the left side of the telescopic housing 12 is movably connected to the inside of the sliding hole 13, and a horizontally arranged limit locking groove 10 is opened on the outside of the upper side of the telescopic housing 12. The outside of the lower side of the limit locking screw 11 is connected to the inner side of the limit locking groove 10. The outside of the left side of the transmission sleeve 6 is movably connected to the center of the inside of the left side of the sliding hole 13. The outside of the left side of the transmission sleeve 6 is fixedly connected to the driven gear 5, and the driven gear 5 is connected to the driving gear 4. The outside of the right side of the transmission sleeve 6 is movably connected to the center of the inside of the left side of the telescopic housing 12. The connecting shaft 8 is fixedly connected to the inside of the left side of the movable housing 9, and the outside of the connecting shaft 8 is movably connected to the inside of the right side of the telescopic housing 12. The angle adjustment mechanism 3 is arranged inside the housing 1 and the telescopic housing 12, and the right side of the angle adjustment mechanism 3 is connected to the connecting shaft 8. The tightening mechanism 7 is arranged inside the transmission sleeve 6, the telescopic housing 12, and the movable housing 9.

[0021] As Figure 3 and Figure 4As shown in the figure, the specific structure of the angle adjustment mechanism 3 includes a first transmission shaft 31, a first guide hole 32, a first spring 33, a second spring 34, a second guide hole 35, a slider 36, an internal hexagonal groove 37, a movable block 38, a cone 39, an inclined hole 310, a pin 311, a clamping hole 312, a first bevel gear 313, a second bevel gear 314, a spline shaft 315, a spline hole sleeve 316, a third bevel gear 317 and a fourth bevel gear 318; the first transmission shaft 31 is movably connected to the inside of the center of the upper side of the outer housing 1, and a first bevel gear 313 is fixedly connected to the outside of the lower side of the first transmission shaft 31; the first guide hole 32 is vertically arranged in the center of the inside of the upper side of the first transmission shaft 31; the second guide hole 35 is horizontally arranged in the inside of the upper side of the first transmission shaft 31; the slider 36 is horizontally movably connected to the inside of the second guide hole 35, a second spring 34 is arranged between the left side of the slider 36 and the left side surface of the second guide hole 35, an inclined hole 310 is formed in the center of the inside of the slider 36, and a pin 311 is fixedly connected to the right end of the slider 36; the outside of the movable block 38 is horizontally movably connected to the inside of the first guide hole 32, a first spring 33 is arranged between the bottom surface of the movable block 38 and the bottom surface of the first guide hole 32, a cone 39 is fixedly connected to the outside of the center of the movable block 38, and the cone 39 is located inside the inclined hole 310; there are several clamping holes 312, and several clamping holes 312 are respectively and evenly formed in the periphery of the inside of the center of the upper side of the outer housing 1; the outside of the pin 311 is respectively connected to the inside of the corresponding clamping hole 312; the internal hexagonal groove 37 is formed in the center of the top surface of the first transmission shaft 31; the outside of the left side of the spline shaft 315 is movably connected to the inside of the center of the left side of the transmission sleeve 6, a second bevel gear 314 is fixedly connected to the outside of the left side of the spline shaft 315, and the second bevel gear 314 is connected to the first bevel gear 313; the outside of the spline hole sleeve 316 is movably connected to the inside of the center of the left side of the tightening mechanism 7, a spline hole arranged in the center of the spline hole sleeve 316 is connected to the spline shaft 315, and a third bevel gear 317 is fixedly connected to the right end of the spline hole sleeve 316; the inside of the center of the fourth bevel gear 318 is fixedly connected to the outside of the connecting shaft 8, and the fourth bevel gear 318 is connected to the third bevel gear 317.

[0022] Among them, the top surface of the movable block 38 is higher than the bottom surface of the internal hexagonal groove 37; a chamfer is arranged at the outer edge of the pin 311.

[0023] As Figure 5As shown, the specific structure of the tightening mechanism 7 includes an inner long groove 71, a movable sleeve 72, a convex long groove 73, a first transmission gear 74, an intermediate gear 75, a second transmission gear 76, a second transmission shaft 77, and a tightening head 78. There are several inner long grooves 71, and the several inner long grooves 71 are respectively transversely formed around the inner wall of the transmission sleeve 6. The outer part of the movable sleeve 72 is provided with several transverse convex long grooves 73, and the convex long grooves 73 are respectively movably connected to the inner sides of the corresponding inner long grooves 71. The right end of the movable sleeve 72 is fixedly connected to the first transmission gear 74. The central part of the intermediate gear 75 is movably connected to the outside of the connecting shaft 8, and the left side of the intermediate gear 75 is connected to the first transmission gear 74. The second transmission shaft 77 is movably connected to the central part of the movable housing 9. The left end of the second transmission shaft 77 is fixedly connected to the second transmission gear 76, and the second transmission gear 76 is connected to the intermediate gear 75. The right end of the second transmission shaft 77 is fixedly connected to the tightening head 78.

[0024] Among them, an inner hexagonal hole is formed on the outer part of the right side of the tightening head 78. The motor 2 is a brushless motor. An anti-slip layer is provided on the outside of the outer housing 1.

[0025] The usage state of the present invention is as follows: The present invention has a reasonable and simple structure, low production cost, and is easy to install. When in use, first connect the power supply to the motor 2. After starting the motor 2, the output shaft on the lower right side of the motor 2 drives the driving gear 4 to rotate. The driving gear 4 meshes with the driven gear 5, so that the driven gear 5 drives the transmission sleeve 6 to rotate. The rotation of the transmission sleeve 6 drives the movable sleeve 72 to rotate, and the transmission gear 74 at the right end of the movable sleeve 72 rotates accordingly. The transmission gear 74 meshes with the intermediate gear 75, and the intermediate gear 75 drives the transmission gear 76 to rotate. The transmission gear 76 is fixed at the left end of the transmission shaft 77, so that the transmission shaft 77 rotates, and the tightening head 78 at the right end of the transmission shaft 77 also rotates accordingly. Put the tightening head 78 on the bolt, and the tightening operation of the bolt can be realized. And according to needs, by loosening the limit locking screw 11, the extending length of the telescopic housing 12 in the sliding hole 13 can be adjusted to adapt to different working position requirements. After adjustment, tighten the limit locking screw 11 again to make the outer side of its lower side connect with the inner side of the limit locking groove 10 on the outer side of the upper side of the telescopic housing 12 to lock the position of the telescopic housing 12. When the angle needs to be adjusted, insert an inner hexagon tool into the inner hexagon groove 37 at the center of the top surface of the transmission shaft 31. At the same time, move the movable block 38 downward. The spring 33 between the bottom surface of the movable block 38 and the bottom surface of the guide hole 32 is compressed. At the same time, the cone 39 on the outer part of the center of the movable block 38 moves downward. The cone 39 interacts with the inclined hole 310 inside the center of the slider 36, so that the slider 36 moves to the left. The spring 34 between the left side of the slider 36 and the left side surface of the guide hole 35 is compressed. The pin 311 at the right end of the slider 36 disengages from the clamping holes 312 around the center inside the upper side of the outer housing 1. Then rotate the inner hexagon tool to drive the transmission shaft 31 to rotate. The rotation of the transmission shaft 31 drives the spline shaft 315 to rotate through the meshing of the bevel gear 313 and the bevel gear 314. The spline shaft 315 drives the bevel gear 317 to rotate through the spline hole sleeve 316. The bevel gear 317 meshes with the bevel gear 318, so as to drive the connecting shaft 8 to rotate to realize angle adjustment. After adjusting to the appropriate angle, loosen the inner hexagon tool. Under the action of the spring 33 and the spring 34, the pin 311 is inserted into the corresponding clamping hole 312 again to lock the angle.

[0026] The control mode of the present invention is controlled by manual start or by existing automation technologies. The wiring diagram of the power element and the power supply are common knowledge in the art. And the present invention is mainly used to protect mechanical devices, so the control mode and wiring layout of the present invention will not be explained in detail.

[0027] In the description of the invention, it should be understood that the orientation or positional relationship indicated by terms such as "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the 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. Therefore, it should not be construed as a limitation on the invention.

[0028] In the invention, unless otherwise clearly specified and defined, terms such as "installed", "set", "connected", "fixed", "swiveling connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0029] The above shows and describes the basic principles, main features and advantages of the invention. Those skilled in the art should understand that the invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the invention. Without departing from the spirit and scope of the invention, the invention will have various changes and improvements, and these changes and improvements all fall within the scope of the invention claimed. The scope of the invention claimed is defined by the appended claims and their equivalents.

Claims

1. A bolt tightening machine for automobile assembly, characterized in that: It comprises an outer shell (1), a motor (2), an angle adjustment mechanism (3), a driving gear (4), a driven gear (5), a transmission sleeve (6), a tightening mechanism (7), a connecting shaft (8), a movable shell (9), a limit locking groove (10), a limit locking screw (11), a telescopic shell (12) and a sliding hole (13); The motor (2) is fixedly connected to the inside of the left side of the outer shell (1), and a driving gear (4) is fixedly connected to the output shaft on the lower right side of the motor (2); The sliding hole (13) is transversely opened in the center of the right side of the outer shell (1), and a limited locking screw (11) is movably connected to a threaded hole arranged on the upper right side of the sliding hole (13); The left outer portion of the telescopic housing (12) is movably connected to the inside of the sliding hole (13), and a transverse limiting locking groove (10) is provided on the upper outer portion of the telescopic housing (12); The outer portion of the lower side of the limit locking screw (11) is connected to the inner side of the limit locking groove (10); The left outer portion of the transmission sleeve (6) is movably connected to the left central interior of the sliding hole (13); the left outer portion of the transmission sleeve (6) is fixedly connected to a driven gear (5), and the driven gear (5) is connected to the driving gear (4); the right outer portion of the transmission sleeve (6) is movably connected to the left central interior of the telescopic housing (12); The left side of the movable housing (9) is fixedly connected to a connecting shaft (8), and the outside of the connecting shaft (8) is movably connected to the right side of the telescopic housing (12); The angle adjustment mechanism (3) is arranged inside the outer shell (1) and the telescopic shell (12), and the right side of the angle adjustment mechanism (3) is connected to the connecting shaft (8); The tightening mechanism (7) is arranged inside the transmission sleeve (6), the telescopic housing (12) and the movable housing (9).

2. The automobile assembly bolt tightening machine according to claim 1, characterized in that: The specific structure of the angle adjustment mechanism (3) includes a transmission shaft 1 (31), a guide hole 1 (32), a spring 1 (33), a spring 2 (34), a guide hole 2 (35), a slider (36), a hexagon socket (37), a movable block (38), a cone (39), a bevel hole (310), a latch (311), a clamping hole (312), a bevel gear 1 (313), a bevel gear 2 (314), a spline shaft (315), a spline hole sleeve (316), a bevel gear 3 (317) and a bevel gear 4 (318); The transmission shaft 1 (31) is movably connected to the central interior of the upper side of the outer shell (1), and the lower side of the transmission shaft 1 (31) is fixedly connected to a bevel gear 1 (313); The guide hole 1 (32) is vertically arranged in the center of the upper side of the transmission shaft 1 (31); The second guide hole (35) is arranged transversely inside the upper side of the first transmission shaft (31); The slider (36) is movably connected in a transverse manner inside the second guide hole (35); a second spring (34) is provided between the left side of the slider (36) and the left side of the second guide hole (35); an inclined hole (310) is provided in the center of the slider (36); and a latch (311) is fixedly connected to the right end of the slider (36); The outside of the movable block (38) is laterally movably connected to the inside of the guide hole (32); a spring (33) is provided between the bottom surface of the movable block (38) and the bottom surface of the guide hole (32); a cone (39) is fixedly connected to the outside of the central portion of the movable block (38), and the cone (39) is located inside the inclined hole (310); There are a plurality of the clamping holes (312), and the plurality of the clamping holes (312) are evenly arranged around the central inner part of the upper side of the outer shell (1); The outer sides of the latch pins (311) are respectively connected to the inner sides of the corresponding locking holes (312); The hexagonal groove (37) is provided at the center of the top surface of the first transmission shaft (31); The left outer portion of the spline shaft (315) is movably connected to the left central interior of the transmission sleeve (6), and the left outer portion of the spline shaft (315) is fixedly connected to a bevel gear 2 (314), and the bevel gear 2 (314) is connected to a bevel gear 1 (313); The spline hole sleeve (316) is externally movably connected to the central interior of the left side of the tightening mechanism (7); the spline hole arranged in the center of the spline hole sleeve (316) is connected to the spline shaft (315); and the right end of the spline hole sleeve (316) is fixedly connected to a bevel gear three (317); The central interior of the bevel gear four (318) is fixedly connected to the exterior of the connecting shaft (8), and the bevel gear four (318) is connected to the bevel gear three (317).

3. The automobile assembly bolt tightening machine according to claim 2, characterized in that: The top surface of the movable block (38) is higher than the bottom surface of the hexagonal socket (37).

4. The automobile assembly bolt tightening machine according to claim 2, characterized in that: The outer edge of the latch pin (311) is provided with a chamfer.

5. The automobile assembly bolt tightening machine according to claim 1, characterized in that: The specific structure of the tightening mechanism (7) comprises an inner long groove (71), a movable sleeve (72), a convex long groove (73), a transmission gear 1 (74), a transition gear (75), a transmission gear 2 (76), a transmission shaft 2 (77) and a tightening head (78); There are a plurality of inner long grooves (71), and the plurality of inner long grooves (71) are respectively and transversely opened around the inner wall of the transmission sleeve (6); The movable sleeve (72) is provided with a plurality of transverse convex long grooves (73) on the outside, and the convex long grooves (73) are movably connected to the inner sides of the corresponding inner long grooves (71), and the right end of the movable sleeve (72) is fixedly connected to a transmission gear 1 (74); The central interior of the transition gear (75) is movably connected to the exterior of the connecting shaft (8), and the left side of the transition gear (75) is connected to the transmission gear 1 (74); The second transmission shaft (77) is movably connected to the central interior of the movable housing (9); the left end of the second transmission shaft (77) is fixedly connected to the second transmission gear (76), and the second transmission gear (76) is connected to the transition gear (75); the right end of the second transmission shaft (77) is fixedly connected to the tightening head (78).

6. The automobile assembly bolt tightening machine according to claim 5, characterized in that: A hexagonal hole is formed on the right side of the tightening head (78).

7. The automobile assembly bolt tightening machine according to claim 1, characterized in that: The motor (2) is a brushless motor.

8. The automobile assembly bolt tightening machine according to claim 1, characterized in that: The outer portion of the outer shell (1) is provided with an anti-slip layer.

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