Cylinder body tile cover bolt mounting and tightening production line

Abstract

The utility model provides a cylinder body tile cover bolt installing and tightening production line which comprises a conveying track, a bolt installing mechanism and a bolt tightening mechanism, the bolt installing mechanism and the bolt tightening mechanism are sequentially arranged along the conveying track, and the bolt installing mechanism comprises a bolt installing workbench, a bolt installing cylinder body jacking assembly, a bolt vibration disc, a bolt arranging assembly and a bolt installing assembly. The conveying track is used for conveying a cylinder body provided with bolts to the bolt tightening mechanism, the bolt tightening mechanism comprises a bolt tightening workbench, a bolt tightening cylinder body jacking assembly used for positioning the cylinder body and a tightening shaft assembly used for tightening the bolts, and the tightening shaft assembly is connected with a bolt tightening position adjusting assembly. According to the production line, the bolts can be automatically arranged, the bolts can be automatically placed into the corresponding mounting holes of the tile cover, meanwhile, the bolts are automatically tightened, and the production line has the advantages of being high in automation degree, high in tile cover bolt mounting efficiency and the like.

Description

Technical Field

[0001] The utility model mainly relates to the technical field related to engine cylinder blocks, in particular to a production line for installing and tightening cylinder block bearing cap bolts. Background Art

[0002] For an engine cylinder block, as Figure 1 shown, a plurality of bearing caps need to be installed thereon. When installing the bearing caps, generally according to the corresponding process requirements, first press-fit the pin bushings on the bearing caps (some bearing caps do not require press-fitting of pin bushings), then place the bearing caps in sequence at the corresponding installation positions of the engine cylinder block, and finally fasten them with bolts.

[0003] In the prior art, after the bearing caps are placed on the cylinder block, generally, bolts are manually inserted into the corresponding installation holes of the bearing caps, and then the bolts are tightened manually or by an automatic tightening machine, which has defects such as low efficiency and high manual labor intensity. Moreover, in the prior art, the automatic tightening equipment generally can only automatically tighten the bolts of one specification of bearing caps, and the equipment versatility is low. Therefore, it is necessary to design an automatic installation and tightening structure for bolts to install and tighten the bolts into the corresponding holes of the bearing caps by means of a manipulator, so as to improve the installation efficiency of the bearing cap bolts. Summary of the Utility Model

[0004] To solve the deficiencies of the current technology, the utility model combines the prior art and starts from practical applications to provide a production line for installing and tightening cylinder block bearing cap bolts, which can automatically sort the bolts, automatically put the bolts into the corresponding installation holes of the bearing caps, and simultaneously automatically tighten the bolts, having advantages such as high automation degree and high installation efficiency of the bearing cap bolts.

[0005] The technical solution of the utility model is as follows:

[0006] A production line for installing and tightening cylinder block bearing cap bolts includes a conveying track, a bolt installation mechanism and a bolt tightening mechanism arranged in sequence along the conveying track. Among them, the bolt installation mechanism includes a bolt installation workbench, a bolt installation cylinder block lifting assembly for positioning the cylinder block, a bolt vibrating disk for providing bolts for installation, a bolt sorting assembly for sorting bolts, and a bolt installation assembly for installing bolts. The conveying track is used to convey the cylinder block with installed bolts to the bolt tightening mechanism. The bolt tightening mechanism includes a bolt tightening workbench, a bolt tightening cylinder block lifting assembly for positioning the cylinder block, and a tightening shaft assembly for tightening bolts. The tightening shaft assembly is connected with a bolt tightening position adjusting assembly.

[0007] Further, a bolt installation cylinder lifting assembly is provided on the bolt installation workbench. A bolt vibrating disk is provided on one side of the bolt installation cylinder lifting assembly. A bolt sorting assembly is provided at the outlet position of the bolt vibrating disk. The bolt sorting assembly is used to sort two bolts into a group at a set spacing and lift the two bolts. Above the bolt sorting assembly, a bolt installation assembly is provided. The bolt installation assembly is used to clamp and convey the bolts sorted into a group into the valve cover installation holes on the cylinder block.

[0008] Further, the bolt installation cylinder lifting assembly includes a bolt installation cylinder positioning plate. A bolt installation cylinder lifting cylinder is connected below the bolt installation cylinder positioning plate. A bolt installation roller path blocking block is provided on one side of the bolt installation cylinder positioning plate. The bolt installation roller path blocking block is connected to a bolt installation roller path blocking cylinder.

[0009] Further, the bolt sorting assembly includes a receiving block. The receiving block has a receiving block inlet channel and a receiving block outlet channel that are perpendicular to each other. The receiving block inlet channel corresponds to the outlet of the bolt vibrating disk. A dividing plate is provided on one side of the receiving block outlet channel. Two bolt positioning grooves are provided on the dividing plate at a certain spacing. The dividing plate is connected to a dividing plate cylinder and can reciprocate, so that the two bolt positioning grooves sequentially correspond to the end of the receiving block outlet channel.

[0010] Further, the bolt sorting assembly further includes a pusher block. The pusher block is arranged in the receiving block outlet channel. The pusher block is connected to a pusher block cylinder. The pusher block is driven by the pusher block cylinder to move, so as to push the bolts in the receiving block outlet channel into the bolt positioning grooves on the dividing plate. The bolt sorting assembly further includes two lifting heads. The two lifting heads are respectively arranged below the bolt positioning grooves on the dividing plate. The two lifting heads are connected to a bolt lifting cylinder.

[0011] Further, the bolt installation assembly includes a bolt installation front-back moving assembly, a bolt installation left-right moving assembly, a bolt installation up-down moving assembly, and a fixture plate. A bolt clamping cylinder is installed on the fixture plate. The bolt clamping cylinder is connected to a bolt clamping head.

[0012] Further, four bolt clamping cylinders are provided. Each bolt clamping cylinder is connected to a bolt clamping head. The four bolt clamping cylinders are distributed in two on both sides of the fixture plate. Both the bolt vibrating disk and the bolt sorting assembly are provided in two groups.

[0013] Further, the bolt tightening position adjusting assembly includes a bolt tightening front-back moving assembly. A bolt tightening up-down moving assembly is installed on the bolt tightening front-back moving assembly. A tightening shaft assembly is installed on the bolt tightening up-down moving assembly.

[0014] Further, the tightening shaft assembly includes a tightening shaft frame body, on which two movable plates are arranged side by side left and right. Two tightening shafts are fixedly installed on each movable plate front and back. A guide rail slider is arranged below the two movable plates, and the distance between the two movable plates is adjusted by a tightening shaft adjusting assembly.

[0015] Further, the tightening shaft adjusting assembly includes a tightening shaft adjusting cylinder, one end of which is connected to one of the movable plates and the other end is connected to the other movable plate.

[0016] Advantages of the present utility model:

[0017] 1. The present utility model can realize automatic positioning of the engine cylinder block, automatic sorting of bolts, and automatic installation of bolts on the valve cover at the bolt installation station. The valve cover with bolts installed is automatically conveyed to the bolt tightening station along with the cylinder block through the conveying track. At the bolt tightening station, it can realize automatic positioning of the engine cylinder head and automatic tightening of bolts, and has the advantages of high automation degree and high efficiency in valve cover bolt installation.

[0018] 2. The structure of the bolt sorting assembly of the present utility model is ingeniously and reasonably designed, and can sort bolts at a set distance, which is convenient for the manipulator to grab and install bolts.

[0019] 3. The bolt installation assembly of the present utility model can realize multi-degree-of-freedom movement, and is flexible and convenient for grabbing and installing bolts.

[0020] 4. Two groups of bolt sorting assemblies are provided in the present utility model. The two sorting assemblies are designed with bolt positioning grooves with different distances according to the hole pitch requirements of the valve cover, so as to meet the bolt installation requirements of different specifications of valve covers. At the same time, the distance between the tightening heads in the present utility model can be adjusted. Cooperating with the two sorting assemblies at the bolt installation station, it can realize automatic installation and tightening of bolts for two specifications of valve covers. Description of the drawings

[0021] Attached Figure 1 It is a schematic structural diagram after the valve cover is installed on the cylinder block.

[0022] Attached Figure 2 It is a schematic overall structure diagram of the present utility model.

[0023] Attached Figure 3 It is a schematic overall structure diagram of the bolt installation mechanism.

[0024] Attached Figure 4 It is a schematic structural diagram of the bolt installation cylinder block lifting assembly.

[0025] Attached Figure 5 It is a schematic structural diagram of the bolt sorting assembly Figure 1 .

[0026] Appendix Figure 6 Structural schematic diagram of bolt sorting assembly Figure 2 .

[0027] Appendix Figure 7 Structural schematic diagram of bolt installation assembly.

[0028] Appendix Figure 8 Schematic diagram of the layout of bolt clamping cylinder

[0029] Appendix Figure 9 Structural schematic diagram of bolt tightening mechanism

[0030] Appendix Figure 10 Structural schematic diagram of tightening shaft assembly

[0031] Appendix Figure 11 Bottom view structural schematic diagram of tightening shaft assembly

[0032] Labels shown in the figure: 1. Cover; 2. Cylinder block; 3. Bolt; 4. Bolt installation workbench; 5. Bolt vibrating disk; 6. Bolt installation cylinder lifting assembly; 7. Bolt sorting assembly; 8. Bolt installation assembly; 9. Bolt installation cylinder lifting cylinder; 10. Bolt installation cylinder positioning plate; 11. Bolt installation track blocking cylinder; 12. Bolt installation track blocking block; 13. Material receiving block; 14. Pusher block cylinder; 15. Pusher block; 16. Dividing plate; 17. Bolt lifting cylinder; 18. Lifting head; 19. Material receiving block inlet channel; 20. Material receiving block outlet channel; 21. Bolt positioning groove; 22. Dividing plate cylinder; 23. Bolt installation front and back moving assembly; 24. Bolt installation left and right moving assembly; 25. Bolt installation up and down moving assembly; 26. Clamping plate; 27. Bolt clamping cylinder; 28. Bolt clamping head; 29. Conveyor track; 30. Bolt installation mechanism; 31. Bolt tightening mechanism; 32. Bolt tightening workbench; 33. Bolt tightening cylinder lifting assembly; 34. Tightening shaft assembly; 35. Bolt tightening front and back moving assembly; 36. Bolt tightening up and down moving assembly; 37. Movable plate; 38. Guide rail slider; 39. Tightening shaft; 40. Tightening shaft adjusting cylinder; 41. Tightening shaft frame. Detailed implementation manners

[0033] In combination with the accompanying drawings and specific embodiments, the present invention will be further described. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by this application.

[0034] Refer to Figure 1As shown, it is a schematic structural diagram of the cylinder block and bearing cap. In the figure, a total of 5 bearing caps 1 are installed on the cylinder block 2. The bearing caps 1 are installed on the cylinder block 2 at intervals in sequence and fixed by bolts 3. The cylinder block bearing cap bolt installation and tightening production line provided in this embodiment mainly realizes the installation of bolts in two parts. One part is that the bolt installation mechanism 30 first places the bolts 3 into the installation holes of the bearing caps 1 in sequence, and the other part is that the bolt tightening mechanism 31 tightens the bolts 3 installed in the installation holes of the bearing caps 1.

[0035] Reference Figure 2 As shown, it is a schematic overall structure diagram of this embodiment. The cylinder block bearing cap bolt installation and tightening production line mainly consists of three parts: a bolt installation mechanism 30, a bolt tightening mechanism 31, and a conveying track 29. The cylinder block 2 with the bearing cap 1 is automatically conveyed into this production line through the conveying track 29. When it reaches the position of the bolt installation mechanism 30, the cylinder block 2 is first positioned and lifted off the conveying track 29, and then the bolts are sequentially installed into the installation holes of the bearing cap 1 by the bolt installation mechanism 30. After that, the cylinder block 2 is lowered onto the conveying track 29 and conveyed to the position of the bolt tightening mechanism 31 along with the conveying track 29. At the position of the bolt tightening mechanism 31, the cylinder block 2 is first positioned and lifted off the conveying track 29, and then the bolt 3 is tightened by the corresponding tightening shaft.

[0036] Reference Figure 3 As shown in the figure, it is a schematic structural diagram related to the bolt installation mechanism 30 provided in this embodiment. The bolt installation mechanism 30 mainly includes a bolt installation workbench 4. At the bolt installation workbench 4, there is a bolt installation cylinder block lifting assembly 6. After the bearing cap 1 is placed on the cylinder block 2, it is conveyed to the position of the bolt installation workbench 4 through the conveying line, and then lifted and positioned by the bolt installation cylinder block lifting assembly 6, so as to facilitate the installation of the bolt 3. A bolt vibrating disk 5 is arranged on one side of the bolt installation cylinder block lifting assembly 6. The bolt vibrating disk 5 is mainly used to provide the bolts 3 used for installation. The outlet of the bolt vibrating disk 5 is a linear vibration, and the bolts 3 are sequentially conveyed to the outlet position through vibration. A bolt sorting assembly 7 is arranged at its outlet position. The bolt sorting assembly 7 mainly sorts the bolts so that two of them are in a group, and arranges and positions the two bolts 3 at the same spacing as the installation holes of the bearing cap 1 to facilitate the subsequent grasping of the bolt installation assembly 8. The bolt installation assembly 8 is arranged above the bolt sorting assembly 7, and it can realize multi-degree-of-freedom movement. It first moves to the position of the bolt sorting assembly 7 to grasp the bolt 3, and then moves to the corresponding position above the bearing cap 1 to put the bolt 3 into the installation hole of the bearing cap 1. After all the bolts 3 are installed, the cylinder block 2 can be transported to the bolt tightening mechanism 31 through the conveying track 29 to automatically tighten the bolt 3.

[0037] Reference Figure 4As shown in the figure, the bolt installation cylinder body lifting assembly 6 mainly includes a bolt installation cylinder body positioning plate 10. A bolt installation cylinder body lifting cylinder 9 is connected below the bolt installation cylinder body positioning plate 10. A bolt installation roller way blocking block 12 is arranged on one side of the bolt installation cylinder body positioning plate 10, and the bolt installation roller way blocking block 12 is connected to a bolt installation roller way blocking cylinder 11. When the cylinder body transported from the previous process reaches the position of the bolt installation workbench 4, the front end is blocked and limited by the raised bolt installation roller way blocking block 12, and the rear end is limited by the anti-retreat block. Then, the bolt installation cylinder body lifting cylinder 9 is started, so that the bolt installation cylinder body positioning plate 10 rises to separate the cylinder body from the conveying track, and then the bolt 3 is installed.

[0038] Reference Figure 5 And Figure 6 As shown in the figure, the bolt sorting assembly 7 mainly includes a material receiving block 13, a material dividing plate 16, and a material pushing block 15. Among them, the material receiving block 13 has a material receiving block inlet channel 19 and a material receiving block outlet channel 20 that are perpendicular to each other. The material receiving block inlet channel 19 corresponds to the outlet of the bolt vibrating disk 5, and the bolt 3 enters the material receiving block inlet channel 19 in sequence. The material pushing block 15 is arranged in the material receiving block outlet channel 20, and the material pushing block 15 is connected to a material pushing block cylinder 14. When the bolt enters the connection position of the material receiving block inlet channel 19 and the material receiving block outlet channel 20, the material pushing block cylinder 14 acts, so that the material pushing block 15 conveys the bolt 3 backward. A material dividing plate 16 is arranged at the end of the material receiving block outlet channel 20. Two bolt positioning grooves 21 with a certain distance are arranged on the material dividing plate 16, and the material dividing plate 16 is connected to a material dividing plate cylinder 22. The material dividing plate cylinder 22 controls the movement of the material dividing plate 16. First, one of the bolt positioning grooves 21 is aligned at the material receiving block outlet channel 20. Under the action of the material pushing block 15, a bolt enters the bolt positioning groove 21. Then, the material dividing plate cylinder 22 acts again, so that the other bolt positioning groove 21 is aligned at the material receiving block outlet channel 20. Under the action of the material pushing block 15, a bolt enters the other bolt positioning groove 21, thus realizing the arrangement of two bolts 3. Two lifting heads 18 are located below the two bolts 3, and the two bolts 3 are lifted under the action of the bolt lifting cylinder 17. At this time, the two bolts 3 are in the Figure 4 shown state, waiting to be grabbed by the bolt installation assembly 8.

[0039] Reference Figure 7 And Figure 8 As shown in the figure, the bolt installation assembly 8 of this embodiment includes a bolt installation front-back movement assembly 23, a bolt installation left-right movement assembly 24, a bolt installation up-down movement assembly 25, and a fixture plate 26. The multi-directional movement of the fixture plate 26 is driven by the bolt installation front-back movement assembly 23, the bolt installation left-right movement assembly 24, and the bolt installation up-down movement assembly 25, so as to grab the bolt and shift it to install on the valve cover.

[0040] Install a bolt clamping cylinder 27 on the fixture plate 26. The bolt clamping cylinder 27 is connected to a bolt clamping head 28. The bolt clamping head 28 is controlled by the bolt clamping cylinder 27 to clamp the bolt 3, and the bolt 3 is installed into the mounting hole of the valve cap through the bolt installation up-and-down movement assembly 25.

[0041] In this embodiment, four bolt clamping cylinders 27 are provided, and each bolt clamping cylinder 27 is connected to a bolt clamping head 28. In the structural design of this embodiment, the equipment can realize the installation of two different types of valve cap bolts. The difference between the two different types of valve caps lies in the different bolt installation spacings. Therefore, among the four bolt clamping heads 28, the two bolt clamping heads 28 on one side and the two bolt clamping heads 28 on the other side can be designed with different spacings to adapt to the installation of valve caps with different hole pitches. The spacing between the two bolt clamping heads 28 on each side is the same as the bolt positioning groove 21 in the corresponding bolt sorting assembly 7. That is, when installing the bolts, for one type of valve cap, use the corresponding set of bolt sorting assembly 7 and bolt clamping head 28, and for the other type of valve cap, use the corresponding other set of bolt sorting assembly 7 and bolt clamping head 28, so as to meet the installation requirements of the two valve caps.

[0042] After the bolt 3 passes through the bolt installation mechanism 30, it is placed in the corresponding mounting hole, but at this time the bolt is not tightened. Therefore, in this embodiment, a bolt tightening mechanism 31 is provided behind the bolt installation mechanism 30 to tighten a plurality of bolts 3.

[0043] Reference Figure 9 As shown, it is a schematic diagram of the relevant structure of the bolt tightening mechanism 31 in this embodiment. The bolt tightening mechanism 31 includes a bolt tightening workbench 32, a bolt tightening cylinder lifting assembly 33, and a tightening shaft assembly 34. The tightening shaft assembly 34 is connected to a bolt tightening position adjusting assembly. In this embodiment, when the cylinder transported by the conveying track 29 moves to the position of the bolt tightening workbench 32, the bolt tightening cylinder lifting assembly 33 acts to position and lift the cylinder away from the conveying track 29. Its structure and principle are the same as those of the bolt installation cylinder lifting assembly 6 of the bolt installation mechanism 30, and will not be further described here. After the cylinder is positioned, the position of the tightening shaft assembly 34 can be adjusted through the bolt tightening position adjusting assembly, so that the tightening shaft assembly 34 tightens the bolt 3.

[0044] In this embodiment, the bolt tightening position adjusting assembly mainly includes a bolt tightening front-and-back movement assembly 35 and a bolt tightening up-and-down movement assembly 36, which are used to adjust the front-and-back and up-and-down positions of the tightening shaft assembly 34, so that the tightening shaft assembly 34 tightens the bolts on the valve cap one by one.

[0045] Reference Figure 10 And Figure 11As shown, in this embodiment, the tightening shaft assembly 34 includes a tightening shaft housing 41.

[0046] On the tightening shaft housing 41, two movable plates 37 are arranged side by side left and right. The movable plates 37 are installed on the guide rail sliders 38 and can move in the left and right directions. On each movable plate 37, two tightening shafts 39 are fixedly installed front and back. Therefore, the tightening shaft assembly 34 includes a total of four tightening shafts and can tighten four bolts at one time. In this embodiment, the distance between the two movable plates 37 can be adjusted by a tightening shaft adjusting cylinder 40. As described above, in this embodiment, two specifications of valve cover bolts can be tightened. The difference between the two specifications of valve covers lies in the different installation distances of the bolts. Therefore, the position of the two movable plates 37 is adjusted by the tightening shaft adjusting cylinder 40 to further adjust the distance between the tightening shafts 39 so that it is applicable to the corresponding specification of the valve cover.

Claims

1. A production line for installing and tightening bolts of a cylinder block and a cylinder head cover, characterized in that, It includes a conveying track, a bolt installation mechanism and a bolt tightening mechanism arranged in sequence along the conveying track. Among them, the bolt installation mechanism includes a bolt installation workbench, a bolt installation cylinder lifting component for positioning the cylinder block, a bolt vibrating disk for providing bolts for installation, a bolt sorting component for sorting bolts, and a bolt installation component for installing bolts. The conveying track is used to convey the cylinder block with installed bolts to the bolt tightening mechanism. The bolt tightening mechanism includes a bolt tightening workbench, a bolt tightening cylinder lifting component for positioning the cylinder block, and a tightening shaft component for tightening bolts. The tightening shaft component is connected with a bolt tightening position adjusting component.

2. The cylinder block and head cover bolt installation and tightening production line according to claim 1, characterized in that The bolt installation cylinder lifting component is arranged on the bolt installation workbench. The bolt vibrating disk is arranged on one side of the bolt installation cylinder lifting component. The bolt sorting component is arranged at the outlet position of the bolt vibrating disk. The bolt sorting component is used to sort two bolts into a group according to a set spacing and lift the two bolts. The bolt installation component is arranged above the bolt sorting component. The bolt installation component is used to clamp and convey the bolts sorted into a group into the valve cover installation holes on the cylinder block.

3. The cylinder block and bearing cap bolt installation and tightening production line according to claim 2, characterized in that, The bolt installation cylinder lifting component includes a bolt installation cylinder positioning plate. A bolt installation cylinder lifting cylinder is connected below the bolt installation cylinder positioning plate. A bolt installation roller way blocking block is arranged on one side of the bolt installation cylinder positioning plate. The bolt installation roller way blocking block is connected with a bolt installation roller way blocking cylinder.

4. The cylinder block and head bolt installation and tightening production line according to claim 2, characterized in that, The bolt sorting component includes a receiving block. The receiving block has a receiving block inlet channel and a receiving block outlet channel that are perpendicular to each other. The receiving block inlet channel corresponds to the outlet of the bolt vibrating disk. A dividing plate is arranged on one side of the receiving block outlet channel. Two bolt positioning grooves with a certain spacing are arranged on the dividing plate. The dividing plate is connected with a dividing plate cylinder and can reciprocate, so that the two bolt positioning grooves sequentially correspond to the end of the receiving block outlet channel.

5. The cylinder block and head cover bolt installation and tightening production line according to claim 4, characterized in that, The bolt sorting component further includes a pushing block. The pushing block is arranged in the receiving block outlet channel. The pushing block is connected with a pushing block cylinder. The pushing block is driven by the pushing block cylinder to move, so as to push the bolts in the receiving block outlet channel into the bolt positioning grooves on the dividing plate. The bolt sorting component further includes two lifting heads. The two lifting heads are respectively arranged below the bolt positioning grooves on the dividing plate. The two lifting heads are connected with a bolt lifting cylinder.

6. The cylinder block and valve cover bolt installation and tightening production line according to claim 2, wherein The bolt installation component includes a bolt installation front-back moving component, a bolt installation left-right moving component, a bolt installation up-down moving component and a fixture plate. A bolt clamping cylinder is installed on the fixture plate. The bolt clamping cylinder is connected with a bolt clamping head.

7. The cylinder block and head cover bolt installation and tightening production line according to claim 6, characterized in that, Four bolt clamping cylinders are provided. Each bolt clamping cylinder is connected with a bolt clamping head. The four bolt clamping cylinders are distributed in two on both sides of the fixture plate. Two groups of the bolt vibrating disk and the bolt sorting component are provided.

8. The cylinder block and head bolt installation and tightening production line according to any one of claims 1-7, characterized in that, The bolt tightening position adjusting component includes a bolt tightening front-back moving component. A bolt tightening up-down moving component is installed on the bolt tightening front-back moving component. A tightening shaft component is installed on the bolt tightening up-down moving component.

9. The cylinder block and head bolt installation and tightening production line according to claim 8, wherein The tightening shaft assembly includes a tightening shaft housing, on which two movable plates are arranged side by side left and right. Two tightening shafts are fixedly installed on each movable plate front and back. A guide rail slider is arranged below the two movable plates, and the distance between the two movable plates is adjusted by a tightening shaft adjusting assembly.

10. The cylinder block and head bolt installation and tightening production line according to claim 9, characterized in that, The tightening shaft adjusting assembly includes a tightening shaft adjusting cylinder, one end of which is connected to one of the movable plates and the other end is connected to the other movable plate.

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