Tightening device for engine cylinder block

Abstract

The utility model relates to a tightening device for an engine cylinder block, which comprises a first disc and a second disc which are connected to two ends of a first connecting rod, and cameras are arranged in central holes of the first disc and the second disc; the first disc is connected with a third barrel, the third barrel is sleeved with a synchronous belt, and a rotating rod of a first servo motor is sleeved with the synchronous belt. The second disc is connected with a second servo motor, and a gear is fixed to the tail end of the second servo motor. A first guide rail is fixed on the second disc, a first sliding block and a second sliding block are slidably connected to the first guide rail, the first sliding block is connected with a first rack, the second sliding block is connected with a second rack, and the first rack and the second rack are meshed with the gear; and tightening guns are fixed on the first sliding block and the second sliding block. By means of the tightening device for the engine cylinder body, the problems that the position of a tightening gun is not accurate, the requirements of bolts of different sizes cannot be flexibly met, and accurate bolt tightening torque control cannot be achieved can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical manufacturing technical field, concretely relates to a kind of tightening device for engine cylinder. BACKGROUND

[0002] In the engine manufacturing and maintenance process, the tightening of bolts is an important step to ensure the reliability and safety of engine components. Traditional manual tightening method usually relies on manual operation, not only low efficiency, but also may appear due to improper operation or unevenly applied torque and lead to tightening quality problems. In order to improve the tightening efficiency and precision, in recent years, automatic tightening technology has been widely used. The existing automatic tightening device usually includes a mechanical arm, a tightening gun and a torque control system. However, these technologies still face some problems in practical application, such as inaccurate position of the tightening gun, inability to flexibly adapt to the needs of different size bolts, inability to achieve precise bolt tightening torque control, etc.

[0003] Therefore, the prior art has defects and needs to be improved and developed. SUMMARY

[0004] The utility model embodiment provides a kind of tightening device for engine cylinder, to solve the problem of inaccurate position of the tightening gun in prior art, inability to flexibly adapt to the needs of different size bolts, inability to achieve precise bolt tightening torque control.

[0005] The utility model discloses an embodiment provides a kind of tightening device for engine cylinder, it is characterized by, including the first disc and second disc respectively connected in the both ends of first connecting rod, the center of the first disc with the second disc is equipped with aperture, the axis of the first disc with the second disc is collinear, camera is arranged in the center aperture of the first disc with the second disc;The side of the first disc not being connected with the first connecting rod is fixedly connected with third cylinder, synchronous belt is sleeved on the outer contour of the third cylinder, the rotating rod of first servo motor is also sleeved in the synchronous belt, when the first servo motor starts, it is used to drive the third cylinder rotation;The side of the second disc being connected with the first connecting rod is also fixedly connected with second servo motor, the rotating rod of second servo motor is passed out from the second disc and fixed with gear at end, the gear is located in the side of the second disc not being connected with the first connecting rod;The side of the second disc not being connected with the first connecting rod is fixed with first guide rail, first sliding block and second sliding block are slidably connected on the first guide rail, first rack is fixed on the side of the first sliding block towards the gear, the tooth surface of the first rack is towards the gear, and the first rack is engaged with the gear;Second rack is fixed on the side of the second sliding block towards the gear, the tooth surface of the second rack is towards the gear, and the second rack is engaged with the gear;Tightening gun is respectively fixed on the first sliding block and the second sliding block, and the tightening gun is perpendicular to the second disc.

[0006] Further, it further includes first base and second base, the first base is connected with first pedestal, the first pedestal is fixed with the first servo motor and first cylinder;Second base is fixed on the second base, fourth cylinder is fixed in the second base, the fourth cylinder is not fixed in the second base on one end and is fixed with the camera, the axis of the fourth cylinder is collinear with the axis of the first cylinder;(The line of camera can be connected with external device in turn through fourth cylinder, second base, second base and external device, and external device includes power supply for powering camera, electronic equipment for receiving and processing camera data;)The third cylinder is sleeved in the first cylinder, and the gap between the third cylinder and the first cylinder is filled with filling material, the axis of the third cylinder and the first cylinder is collinear, the second cylinder is fixed on the outer contour of the third cylinder, the second cylinder is between the first cylinder and the second base, and the synchronous belt is sleeved on the outer contour of the second cylinder.

[0007] Further, the first base is fixed with a second guide rail, the bottom of the first base is fixed with a third sliding block, the third sliding block is slidingly connected to the second guide rail; the side of the first base away from the first base is further fixed with a pneumatic cylinder, the end of the piston rod of the pneumatic cylinder is fixed to the bottom of the first base, when the piston rod of the pneumatic cylinder is retracted, the third sliding block is driven to slide on the second guide rail to move the first base.

[0008] Further, the filling material is one of a steel ball and a rubber pad.

[0009] Further, the first cylinder, the second cylinder, the third cylinder and the fourth cylinder are plastic cylinders.

[0010] Further, the side of the second disc connected to the first guide rail is further fixed with a plurality of second connecting rods, the end of the plurality of second connecting rods not connected to the second disc is fixed with a lamp panel.

[0011] Further, the first disc and the second disc are covered with a cover.

[0012] Further, the first connecting rod has at least two, the radii between any adjacent first connecting rods are the same.

[0013] Further, the first connecting rod is connected to the first disc and the second disc by bolting.

[0014] Further, the first disc and the second disc are plastic discs.

[0015] Beneficial effects:

[0016] The utility model provides a kind of tightening device for engine cylinder, camera is compared by being photographed, determine whether the tightening gun is to pass gear, first rack, second rack variable pitch, and by second servo motor rotation, control the size of variable pitch, realize in complex working environment, tightening gun is accurately positioned to bolt position, improve tightening precision.Two tightening gun's position variable pitch is in place, then by cylinder first base is approached on second guide rail to engine cylinder, until the sleeve head of tightening gun is set on the bolt of engine cylinder, then tightening gun is tightened to the torque of setting, cylinder is retreated first base after tightening, first base is away from engine cylinder on second guide rail.First servo motor rotation, can let the position of two tightening guns be variable, after tightening gun is rotated to other bolt position that needs to be tightened, if variable pitch is needed to tightening gun, then variable pitch again, then repeat the action before, complete the tightening of bolt, realize the selection of tightening position and the control enrichment of tightening torque, to carry out dynamic adjustment according to actual situation, improve tightening quality.Through integrated camera, servo motor and gear transmission system, the accurate control of tightening gun position and variable pitch is realized, solve the problem that position and angle cannot be flexibly adjusted in prior art.In addition, the device adopts the way of camera photographing comparison, can monitor bolt position in real time during tightening, so as to ensure the precision and consistency of tightening process.The utility model provides a kind of tightening device for engine cylinder, can effectively improve the efficiency and precision of bolt tightening, reduce the dependence of manual operation, and improve the overall operation efficiency of production line by automatic control system.For engine manufacturing and maintenance of automobile, machinery and other industries, it has important practical application significance.

[0017] It should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below can be seen as being part of the inventive subject matter of the present disclosure, provided such concepts are not mutually inconsistent.

[0018] The foregoing and other aspects, embodiments and features of the present teachings can be better understood and appreciated from the following description of the embodiments of the present teachings taken together with the accompanying drawings. Other aspects, embodiments and features of the present teachings will be apparent from the description of the embodiments thereof, taken together with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings are not drawn to true scale. In the drawings, each same or like component is denoted with the same reference numeral. For the sake of clarity, not every component is marked in every drawing. Embodiments of various aspects of the present teachings will now be described, by way of example, with reference to the drawings, in which:

[0020] Figure 1A structure diagram of a tightening device for an engine cylinder without a cover shell in an embodiment of the present application.

[0021] Figure 2 Another angle structure diagram of a tightening device for an engine cylinder without a cover shell in an embodiment of the present application.

[0022] Figure 3 A partial structure diagram of a tightening device for an engine cylinder in an embodiment of the present application.

[0023] Figure 4 A structure diagram of a tightening device for an engine cylinder with a cover shell in an embodiment of the present application.

[0024] BRIEF DESCRIPTION OF THE DRAWINGS

[0025] First base 1; first pedestal 2; first servo motor 3; first cylinder 4; second base 5; second pedestal 6; synchronous belt 7; second cylinder 8; third cylinder 9; fourth cylinder 10; camera 101; first disc 11; first connecting rod 12; second disc 13; second servo motor 14; gear 15; first guide rail 16; first sliding block 17; first rack 18; second sliding block 19; second rack 20; tightening gun 21; second guide rail 22; third sliding block 23; cylinder 24; second connecting rod 25; lamp disc 26; cover shell 27. DETAILED DESCRIPTION

[0026] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of the present application. Unless otherwise defined, the technical terms or scientific terms used herein should be understood as the common meanings thereof by those of ordinary skill in the art.

[0027] The terms "first", "second", and similar terms used herein do not necessarily have any temporal or chronological significance, but are used to distinguish one element from another. Similarly, the singular forms "a", "an", and "the" do not necessarily denote the limitation of quantity, but denote the existence of at least one. The terms "comprises", "comprising", "includes", "including" and the like can mean the presence of a feature, item, component or element that can be present or added, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components or groups thereof. The terms "upper", "lower", "left", "right" and the like are used for the purpose of description only and are not intended to limit the relative position of the described objects.

[0028] In the prior art, the position of the tightening gun is not accurate, it cannot flexibly adapt to the needs of bolts of different sizes, and it cannot achieve precise bolt tightening torque control. When precisely tightening bolts of different sizes, the existing equipment is difficult to effectively adjust the position and angle of the tightening gun, resulting in the inability to adapt to diversified bolt structures. The selection of the tightening position and the control of the tightening torque of the traditional equipment are relatively single, and it is difficult to dynamically adjust according to the actual situation, causing fluctuations in the tightening quality. The prior art lacks an effective visual feedback mechanism, resulting in the inability of the tightening gun to accurately position the bolt position in a complex working environment, affecting the tightening precision.

[0029] In view of this, with reference to Figures 1-3The utility model discloses an embodiment provides a kind of tightening device for engine cylinder, including the first disc 11 and second disc 13 respectively connected in the both ends of first connecting rod 12, the center of first disc 11 and second disc 13 is equipped with aperture, the axis of first disc 11 and second disc 13 is collinear, and the center aperture of first disc 11 and second disc 13 is provided with camera 101;Camera 101 does not contact with first disc 11 or second disc 13, when first disc 11 or second disc 13 rotates, camera 101 is fixed different, with the same angle is photographed.The side of first disc 11 not being connected with first connecting rod 12 is fixedly connected with third cylinder 9, and synchronous belt 7 is sleeved on the outer contour of third cylinder 9, and the rotating rod of first servo motor 3 is also sleeved in synchronous belt 7, for driving third cylinder 9 to rotate when first servo motor 3 starts.The side of second disc 13 being connected with first connecting rod 12 is also fixedly connected with second servo motor 14, and the rotating rod of second servo motor 14 passes out from second disc 13 and is fixed with gear 15 at the end, and gear 15 is located at the side of second disc 13 not being connected with first connecting rod 12;The side of second disc 13 not being connected with first connecting rod 12 is fixed with first guide rail 16, and first guide rail 16 is slidably connected with first sliding block 17 and second sliding block 19, and the side of first sliding block 17 towards gear 15 is fixed with first rack 18, and the tooth surface of first rack 18 is towards gear 15, and first rack 18 is engaged with gear 15;The side of second sliding block 19 towards gear 15 is fixed with connecting block, and second rack 20 is fixed on connecting block, and the tooth surface of second rack 20 is towards gear 15, and second rack 20 is engaged with gear 15;First sliding block 17 and second sliding block 19 are respectively fixed with tightening gun 21, and tightening gun 21 is perpendicular to second disc 13.

[0030] Through camera 101 real-time shooting and comparing bolt position on engine cylinder, judge whether the distance of tightening gun 21 needs to be adjusted.First servo motor 3 drives third cylinder 9 to rotate, thereby driving synchronous belt 7 to drive second servo motor 14 to rotate, controls the engagement of gear 15, first rack 18 and second rack 20, and then adjusts the variable pitch of tightening gun 21, to ensure that tightening gun 21 reaches bolt position.After adjusting position, tightening gun 21 carries out the tightening operation of bolt.Realize accurate tightening of engine cylinder bolt, and can adjust the distance of tightening gun 21 to adapt to bolts in different positions.The real-time comparison function of camera 101 ensures the efficiency and accuracy of the tightening process.By using camera 101 to take pictures and compare bolt positions, and adjusting the position of tightening gun 21 according to the comparison result, the intelligentization and automation degree of the device is improved.The combination of gear 15, rack and servo motor realizes accurate adjustment of the position of tightening gun 21, avoiding the error and inefficiency of manual adjustment in traditional methods.Combining the cooperative work of first servo motor 3 and second servo motor 14, accurate tightening of different bolt positions is realized.

[0031] In some embodiments, referring to Figures 1-2 , the device further comprises a first base 1 and a second base 5, the first base 1 is connected with a first pedestal 2, the first pedestal 2 is fixed with a first servo motor 3 and a first cylinder 4; the second base 5 is fixed with a second pedestal 6, the second pedestal 6 is fixed with a fourth cylinder 10, the fourth cylinder 10 is fixed with a camera 101 at one end of the second pedestal 6, the axis of the fourth cylinder 10 is collinear with the axis of the first cylinder 4; the line of the camera 101 can be connected with external equipment through the fourth cylinder 10, the second pedestal 6, the second base 5 in turn, the external equipment includes a power supply for powering the camera 101, electronic equipment for receiving and processing camera 101 data; a third cylinder 9 is sleeved in the first cylinder 4, the gap between the third cylinder 9 and the first cylinder 4 is filled with a filler, the axis of the third cylinder 9 is collinear with the axis of the first cylinder 4, the outer contour of the third cylinder 9 is fixed with a second cylinder 8, the second cylinder 8 is between the first cylinder 4 and the second pedestal 6, the outer contour of the second cylinder 8 is sleeved with a synchronous belt 7.

[0032] The device reduces mechanical friction and supports the third cylinder 9 by filling the gap between the third cylinder 9 and the first cylinder 4 with a filler, improving the stability of the device. The axes of the first cylinder 4 and the fourth cylinder 10 are collinear, facilitating synchronous rotation. In addition, the device reduces the structure size and optimizes the power transmission path through the multi-layer cylinder structure. The use of the filler effectively reduces the friction between the cylinders, improving the smoothness and life of the device. The design of the multi-layer cylinder structure reduces the complexity of the device and improves the motion accuracy.

[0033] In some embodiments, the first base 1 is fixed with a second guide rail 22, the bottom of the first pedestal 2 is fixed with a third sliding block 23, the third sliding block 23 is slidingly connected to the second guide rail 22; the side of the first base 1 away from the first pedestal 2 is also fixed with a pneumatic cylinder 24, the end of the piston rod of the pneumatic cylinder 24 is fixed to the bottom of the first pedestal 2, when the piston rod of the pneumatic cylinder 24 extends and retracts, it is used to drive the third sliding block 23 to slide on the second guide rail 22 to move the first pedestal 2.

[0034] The first base 2 is driven to slide along the second guide rail 22 by the piston rod of the air cylinder 24, so that the tightening gun 21 can approach the engine block. When the air cylinder 24 is extended or retracted, the movement of the first base 2 is controlled to ensure that the tightening gun 21 can accurately reach the bolt position and complete the tightening task. The sliding of the first base 2 controlled by the air cylinder 24 can flexibly adjust the distance between the tightening gun 21 and the bolt, increasing the adaptability of the device, especially on engine blocks of different sizes and layouts. The sliding of the first base 2 controlled by the air cylinder 24 ensures that the device can still efficiently complete the task in complex environments, providing a high-precision control mechanism for the positioning of the tightening gun 21, avoiding the errors of manual adjustment in traditional methods.

[0035] In some embodiments, the filler is one of a steel ball and a rubber pad. After selecting the type of filler, the friction and motion efficiency are optimized according to its characteristics. Steel balls have a low friction coefficient, while rubber pads can provide a certain buffering effect to enhance the stability of the device. According to different types of fillers, the friction performance and motion efficiency of the device are optimized to meet the needs of different working conditions and improve the reliability of the device. Selecting different types of fillers as a means of friction reduction allows the device to adapt to a wider range of working environments and requirements.

[0036] In some embodiments, the first cylinder 4, the second cylinder 8, the third cylinder 9, and the fourth cylinder 10 are all plastic cylinders. Using plastic materials to manufacture reduces the overall weight of the equipment and lowers production costs. Plastic materials have good wear resistance and corrosion resistance, making them suitable for long-term use in industrial environments. Using plastic cylinders reduces the weight of the device, while the good physical properties of plastic materials ensure the stability and durability of the device during long-term use.

[0037] In some embodiments, the second disc 13 is connected to one side of the first guide rail 16 and is also fixed with a plurality of second connecting rods 25, and the ends of the plurality of second connecting rods 25 not connected to the second disc 13 are fixed with a lamp panel 26. A plurality of second connecting rods 25 are provided on the second disc 13 for connecting the lamp panel 26, which provides lighting function, facilitating the camera 101 to take pictures in low light environment to complete subsequent operations. The setting of the lamp panel 26 enhances the practicality of the device, especially in poor lighting conditions. The lamp panel 26 can provide additional lighting to ensure that the tightening operation can still be accurately performed in low light environments. The lamp panel 26 can be a rechargeable lamp panel, and the lamp beads are selected to be LED lamp beads.

[0038] In some embodiments, referring to Figure 4A cover 27 is provided between the first disk 11 and the second disk 13. The cover 27 prevents the internal components of the equipment from being contaminated or damaged by the external environment, ensuring the long-term stable operation of the equipment. The cover 27 effectively protects the internal structure of the equipment from external physical damage and increases the safety of the equipment.

[0039] In some embodiments, there are at least two first connecting rods 12, and the curvature between any two adjacent first connecting rods 12 is the same. This design, with the same number and curvature of the first connecting rods 12, makes the connection between the first disk 11 and the second disk 13 more stable, and also more stable during operation, avoiding errors caused by uneven design of the connecting rods. The first connecting rods 12 with the same curvature ensure the balance and accuracy of the device, improving the operational precision of the equipment.

[0040] In some embodiments, the first connecting rod 12 is connected to the first disk 11 and the second disk 13 by bolts. Connecting the first connecting rod 12 to the first disk 11 and the second disk 13 by bolts increases the replaceability of the structure. Different sizes of first connecting rods 12 can be selected for different sizes of engine blocks, and disassembly is quick and convenient.

[0041] In some embodiments, both the first disk 11 and the second disk 13 are made of plastic. The use of plastic disks further reduces the overall weight of the device while providing good corrosion resistance and wear resistance. The application of plastic disks ensures the device's lightweight and durability, improving its performance over long-term use.

[0042] This utility model provides a tightening device for engine cylinder blocks, mainly used for automatically tightening bolts on engine cylinder blocks. The device achieves precise tightening through the coordinated operation of multiple mechanical components, and the angle and position of the tightening gun 21 can be adjusted as needed to ensure that each bolt reaches the set torque requirement.

[0043] It has the following functions: 1. Automatic tightening: It can monitor and compare in real time through camera 101 to automatically determine whether the angle and position of the tightening gun 21 need to be adjusted, thereby ensuring the precise tightening of multiple bolts on the engine block. 2. Pitch adjustment: The gear 15 and the first rack 18 and second rack 20 in the device can adjust the working distance of the tightening gun 21 as needed to adapt to bolts in different positions. 3. Precise control: Through the coordinated work of the first servo motor 3 and the second servo motor 14, the first servo motor 3 controls the angle of the tightening gun 21, and the second servo motor 14 controls the pitch of the tightening gun 21, thereby precisely controlling the action of the tightening gun 21 and achieving precise tightening at multiple points. 4. Cylinder 24 drive: The piston rod of the cylinder 24 drives the first base 2 to slide on the second guide rail 22, thereby controlling the tightening gun 21 to move closer to or away from the engine block, realizing intelligent operation.

[0044] This utility model provides a tightening device for engine cylinder blocks, which uses multiple mechanical components to cooperate in completing the tightening task. The specific principle and steps are as follows: 1. The camera 101 captures and compares the positions of the engine cylinder block bolts to determine whether the tightening gun 21 needs adjustment: Driven by the first servo motor 3, the synchronous belt 7 rotates, causing the second cylinder 8 to rotate. The second cylinder 8 is fixed to the third cylinder 9, so the third cylinder 9 rotates accordingly. The rotation of the third cylinder 9 changes the angle of the two tightening guns 21 to the required position. Driven by the second servo motor 14, the gear 15 rotates, causing the meshing of the first rack 18 and the second rack 20 to change, thereby changing the distance between the two tightening guns 21 and completing the adjustment of the working distance of the tightening gun 21. 2. The piston rod of the cylinder 24 retracts, causing the first base 2 to slide on the second guide rail 22, so that the sleeve head of the tightening gun 21 can be fitted onto the bolt of the engine cylinder block, accurately contacting the bolt to achieve tightening. Since the tightening gun 21 can be selected as an adjustable torque tightening gun 21, tightening is achieved. 3. Tightening other bolts: The piston rod of cylinder 24 extends, causing the first base 2 to slide on the second guide rail 22, moving the tightening gun 21 away from the engine block. Driven by the first servo motor 3, the angle of the tightening gun 21 changes; driven by the second servo motor 14, the spacing of the tightening gun 21 changes, enabling the tightening gun 21 to tighten other bolts. 4. After all bolts are tightened, the piston rod of cylinder 24 extends, causing the first base 2 to slide on the second guide rail 22, moving the tightening gun 21 away from the engine block.

[0045] In summary, this utility model provides a tightening device for engine cylinder blocks. The camera 101 performs image comparison to determine whether the tightening gun 21 needs to change its pitch via gear 15, first rack 18, and second rack 20. The second servo motor 14 rotates to control the pitch change, enabling the tightening gun 21 to accurately position the bolt in complex working environments, thus improving tightening accuracy. After the two tightening guns 21 are in position, the cylinder 24 pulls the first base 2 along the second guide rail 22 towards the engine cylinder block until the sleeve head of the tightening gun 21 is fitted onto the bolt in the engine cylinder block. Then, the tightening gun 21 tightens to the set torque. After tightening, the cylinder 24 retracts to the first base 2, which then moves away from the engine cylinder block along the second guide rail 22. The rotation of the first servo motor 3 allows the positions of the two tightening guns 21 to change. After the tightening guns 21 rotate to the positions of other bolts that need tightening, if the torque needs to be changed, the torque is changed again, and then the previous actions are repeated to complete the tightening of the bolts. This enriches the selection of tightening positions and the control of tightening torque, allowing for dynamic adjustments based on actual conditions and improving tightening quality. By integrating the camera 101, servo motor, and gear 15 transmission system, precise control of the position and torque of the tightening guns 21 is achieved, solving the problem of inflexible position and angle adjustment in existing technologies. In addition, the device uses the camera 101 to take pictures and compare, enabling real-time monitoring of the bolt position during the tightening process, thereby ensuring the accuracy and consistency of the tightening process. This utility model provides a tightening device for engine cylinder blocks, which can effectively improve the efficiency and accuracy of bolt tightening, reduce reliance on manual operation, and improve the overall operating efficiency of the production line through an automated control system. It has important practical application significance for engine manufacturing and maintenance in industries such as automobiles and machinery.

[0046] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. A tightening device for an engine block, characterized by, The utility model provides a kind of camera crane, including respectively connecting the first connecting rod both ends first disc and second disc, the center of the first disc with the second disc is equipped with opening, the axis of the first disc with the second disc is collinear, the center opening of the first disc with the second disc is equipped with camera;The side of the first disc not being connected with the first connecting rod is fixedly connected with third cylinder, the outer contour of the third cylinder is equipped with synchronous belt, the synchronous belt is also equipped with the rotating rod of first servo motor, when the first servo motor starts, for driving the third cylinder rotates;The side of the second disc connecting the first connecting rod is also fixedly connected with second servo motor, the rotating rod of the second servo motor is out of the second disc and is fixed with gear at end, the gear is located in the side of the second disc not being connected with the first connecting rod;The side of the second disc not being connected with the first connecting rod is fixed with first guide rail, the first guide rail is slidably connected with first slider and second slider, the side of the first slider towards the gear is fixed with first rack, the tooth surface of the first rack faces the gear, and the first rack is engaged with the gear;The side of the second slider towards the gear is fixed with connecting block, the connecting block is fixed with second rack, the tooth surface of the second rack faces the gear, and the second rack is engaged with the gear;First slider and second slider are respectively fixed with tightening gun, and the tightening gun is perpendicular to the second disc.

2. A tightening device for an engine block according to claim 1, characterized in that, Also including first base and second base, the first base is connected with first pedestal, and the first pedestal is fixed with the first servo motor and first cylinder;The second base is fixed with second pedestal, and the fourth cylinder is fixed in the second pedestal, the end of the fourth cylinder not being fixed in the second pedestal is fixed with the camera, and the axis of the fourth cylinder is collinear with the axis of the first cylinder;The third cylinder is sleeved in the first cylinder, the gap between the third cylinder and the first cylinder is filled with filling material, the axis of the third cylinder is collinear with the axis of the first cylinder, the outer contour of the third cylinder is fixed with second cylinder, the second cylinder is between the first cylinder and the second pedestal, and the outer contour of the second cylinder is sleeved with the synchronous belt.

3. A tightening device for an engine block according to claim 2, characterized in that The first base is fixed with second guide rail, the bottom of the first pedestal is fixed with third slider, and the third slider is slidably connected to the second guide rail;The side of the first base away from the first pedestal is also fixed with air cylinder, and the end of the piston rod of the air cylinder is fixed on the bottom of the first pedestal, so that the third slider is slidably driven on the second guide rail to move the first pedestal when the piston rod of the air cylinder is retracted.

4. A tightening device for an engine block according to claim 2, characterized in that, The filling material is one of steel balls and rubber pads.

5. A tightening device for an engine block according to claim 2, characterized in that, The first cylinder, the second cylinder, the third cylinder and the fourth cylinder are all plastic cylinders.

6. A tightening device for an engine block according to claim 1, characterized in that, The side of the second disc connecting the first guide rail is also fixed with a plurality of second connecting rods, and the end of the plurality of second connecting rods not being connected with the second disc is fixed with lamp panel.

7. A tightening device for an engine block according to claim 1, characterized in that, The first disc and the second disc are covered by a cover.

8. A tightening device for an engine block according to claim 1, characterized in that, The first connecting rods are at least two, and the arc between any adjacent first connecting rods is the same.

9. A tightening device for an engine block according to claim 1, characterized in that, The first connecting rods are connected to the first disc and the second disc by bolts.

10. A tightening device for an engine block according to claim 9, characterized in that The first disc and the second disc are plastic discs.

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