Measuring Device for Crankshaft Rotation Torque and Axial Clearance during Engine Assembly

Abstract

The present invention discloses a measuring device for the rotational torque and axial clearance of a crankshaft during engine assembly, which includes a first support frame and a second support frame. On the first support frame, there is a first axial component for pushing the crankshaft to move axially and a support component for supporting the curved surface box body through a first moving component. The first moving component can drive the first axial component and the support component to move back and forth. In the middle of the second support frame, there is a fixing component for fixing the bearing member. On the second support frame, there is a second axial component for pushing the crankshaft to move axially through a second moving component. The second moving component can drive the second axial component to move back and forth. The second axial component and the first axial component cooperate to measure the rotational torque and axial clearance of the crankshaft. During the engine assembly process, after the crankshaft assembly is completed, the rotational torque and axial clearance of the crankshaft can be measured, so that problems can be discovered in advance and the repair rate of engine assembly can be reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of engine assembly equipment, and particularly relates to a device for measuring the rotational torque and axial clearance of a crankshaft during engine assembly. Background Art

[0002] The axial clearance of an engine crankshaft is a very important dimension in an engine. If the clearance is too large, it will increase the axial movement and impact of the crankshaft, generate noise, increase the wear of each moving pair, reduce the service life, and in severe cases, the thrust washer will wear and fall off, resulting in the direct scrapping of the engine. If the clearance is too small, it is easy to cause jamming, or it is difficult to form an oil film between the thrust washer and the crankshaft, resulting in poor lubrication and wear. Over time, the clearance will continue to increase. In the prior art, when detecting the axial clearance of an engine crankshaft, it is usually detected after the engine assembly is completed. However, when it is detected that the axial clearance of the engine crankshaft is not within the design range, it is necessary to adjust the components inside the engine. During the adjustment, some components need to be disassembled, which leads to rework of the engine assembly, thus increasing the workload. Summary of the Invention

[0003] The present invention intends to provide a device for measuring the rotational torque and axial clearance of a crankshaft during engine assembly. During the engine assembly process, after the crankshaft is assembled, the rotational torque and axial clearance of the crankshaft can be measured, so as to discover problems in advance and reduce the repair rate of engine assembly.

[0004] For this purpose, the technical solution adopted by the present invention is as follows: A device for measuring the rotational torque and axial clearance of a crankshaft during engine assembly, including a first support frame arranged on one side of the engine assembly line and a second support frame arranged on the other side of the engine assembly line. A first axial component for pushing the crankshaft axially and a support component for supporting the curved surface box body are arranged on the first support frame through a first moving component. The first moving component can drive the first axial component and the support component to move back and forth. A fixing component capable of fixing a carrier is arranged in the middle of the second support frame. The carrier is arranged on a carrier component that can flow on the engine assembly line extending left and right. A second axial component capable of pushing the crankshaft axially is arranged on the second support frame through a second moving component. The second moving component can drive the second axial component to move back and forth. The second axial component and the first axial component cooperate to test the rotational torque and axial clearance of the crankshaft.

[0005] Preferably, in the above solution, the first axial component includes a first axial cylinder arranged on the first moving component. A head that can abut against the crankshaft is arranged at the output end of the first axial cylinder. When the first axial cylinder works, it can push the crankshaft axially through the head.

[0006] Further preferably, the support assembly includes a support cylinder disposed on the first moving assembly through a support plate, and a support pad located below the crankcase is provided at the output end of the support cylinder. When the support cylinder operates, it can push the support pad upward to support it below the crankcase.

[0007] Further preferably, the second axial assembly includes an axial moving plate disposed on the second moving assembly through a guide rail slider assembly and a second axial cylinder capable of driving the axial moving plate to axially move. A torque motor capable of driving the crankshaft transmission and testing torque is provided on the axial moving plate. A plug inserted into the end of the crankshaft is provided at the output end of the torque motor, and a mating groove is provided at a position corresponding to the crankshaft pin on the plug.

[0008] Further preferably, the fixing assembly includes upper clamping blocks and lower clamping blocks arranged opposite to each other up and down, and two upper clamping blocks and two lower clamping blocks are respectively arranged at intervals left and right. Clamping rollers are provided on all the upper clamping blocks and lower clamping blocks through clamping shafts. All the upper clamping blocks are correspondingly arranged on the second support frame, and each lower clamping block is arranged on the second support frame through a corresponding clamping assembly, and the clamping assembly can drive the lower clamping block to move up and down, so as to realize the loosening or clamping of the carrier.

[0009] Further preferably, the clamping assembly includes a clamping seat and a clamping cylinder. The clamping seat is arranged on the front side of the second support frame. The rear side of the upper end of the lower clamping block is hinged to the clamping seat. The clamping shaft and the clamping roller on the lower clamping block are arranged on the front side of the upper end of the lower clamping block. The clamping cylinder is arranged on the rear side of the second support frame, and the telescopic end of the clamping cylinder passes through the second support frame and is hinged to the rear side of the lower end of the lower clamping block. A coaxial rod is also arranged between the two lower clamping blocks.

[0010] Further preferably, a limiting assembly for limiting the lower limit position of the lower clamping block is also arranged on the second support frame. The limiting assembly includes a limiting cylinder arranged on the second support frame through a cylinder bracket. The output end of the limiting cylinder extends left and right. When the limiting cylinder operates, the output end of the limiting cylinder can extend below the lower limit position of the lower clamping block.

[0011] Further preferably, the first moving assembly and the second moving assembly have the same structure, and both include a moving plate and a moving cylinder. The moving plate is arranged on the corresponding support frame through a guide rail slider assembly. The moving cylinder is arranged on the corresponding support frame, and the output end is arranged on the moving plate.

[0012] Further preferably, a holding assembly for maintaining the state of the moving plate is arranged on the second moving assembly. The holding assembly includes a holding cylinder. A holding hole is arranged on the moving plate. When the second moving assembly moves in place, the holding cylinder operates and extends upward into the holding hole.

[0013] Further preferably, the carrier assembly includes a bottom plate and a support base. The bottom plate is used to drive the entire carrier assembly to move along with the engine assembly line. The carrier is used to support and fix the cylinder block. The bottom plate and the support base are connected by a rotating assembly that can rotate in the horizontal plane. The carrier is clamped to the upper end of the support base from top to bottom. A support surface that matches the cylinder block and is located inside the cylinder block is provided on the front side of the carrier. Fixing holes that extend front and back and can fix the cylinder block on the support surface are provided on the support surface. Clamping protrusions for clamping the carrier by a fixing component are provided at both the left and right ends of the rear side of the carrier. Clamping blocks that facilitate clamping are provided at both the upper and lower ends of each clamping protrusion. Clamping arc grooves facing the corresponding side are provided on each clamping block.

[0014] Further preferably, the carrier assembly further includes a fitting tray. The fitting tray is arranged on either the left or right side surface of the bottom plate through a fitting tray bracket. A bin bracket for placing a material bin, a crankshaft bracket for placing a crankshaft, a connecting rod cap bracket for placing a connecting rod cap, a piston connecting rod bracket for placing a piston connecting rod, a main bearing cap area for placing a main bearing cap, and a camshaft cap area for placing a camshaft cap are provided on the fitting tray.

[0015] Further preferably, clamping protrusions extend from both the left and right ends of the middle part of the carrier. Clamping chutes corresponding to the clamping protrusions are provided at the upper end of the support base. First rollers for reducing friction are provided on the front side, rear side, and bottom surface of the clamping chute. The first rollers are installed on the support base through corresponding roller shafts. Installation holes are provided on the support base at positions corresponding to each roller shaft and the first roller, and the heights of each first roller are not equal. A clamping block that matches the clamping chute is provided on the outside of each clamping protrusion. The first roller contacts the clamping block.

[0016] Further preferably, the rotating assembly includes a rotating disk and a cover plate. The cover plate is fixed above the bottom plate. An anti - detachment disk located inside the bottom plate is provided after the lower end of the rotating disk passes through the middle of the cover plate. A bearing is provided between the rotating disk and the cover plate. An anti - rotation assembly for preventing the rotating disk from rotating is provided on the rotating disk. The anti - rotation assembly includes an anti - rotation block, an anti - rotation seat, and an anti - rotation handle. The anti - rotation seat is installed on the cover plate. The middle part of the anti - rotation block is hinged to the anti - rotation seat. An anti - rotation clamping block is provided below the rotating disk. An anti - rotation groove is provided along the radial direction of the rotating disk on the bottom surface of the anti - rotation clamping block. One end of the anti - rotation block can be clamped from below onto the anti - rotation groove. The lower end of the anti - rotation handle is arranged at the other end of the anti - rotation block. The weight of the other end of the anti - rotation block is greater than that of one end. A second roller that protrudes upward from the anti - rotation block is provided at one end of the anti - rotation block.

[0017] Advantages of the present invention: During the engine assembly process, after the crankshaft assembly is completed, the rotational torque and axial clearance of the crankshaft can be detected, so that problems can be discovered in advance and the repair rate of engine assembly can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the present invention.

[0019] Figure 2 It is a schematic diagram of the support assembly and the first axial assembly of the present invention installed on the first support frame.

[0020] Figure 3 It is a schematic diagram of the fixing assembly and the second axial assembly of the present invention installed on the second support frame Figure 1 .

[0021] Figure 4 It is a schematic diagram of the fixing assembly and the second axial assembly of the present invention installed on the second support frame Figure 2 .

[0022] Figure 5 It is a schematic diagram of the installation of the fixing assembly of the present invention Figure 1 .

[0023] Figure 6 It is a schematic diagram of the installation of the fixing assembly of the present invention Figure 2 .

[0024] Figure 7 It is a schematic diagram of the installation of the second axial assembly of the present invention.

[0025] Figure 8 It is a schematic diagram of Embodiment 1 of the carrier assembly of the present invention Figure 1 (The clamping block and the clamping piece are separately arranged).

[0026] Figure 9 It is a schematic diagram of Embodiment 1 of the carrier assembly of the present invention Figure 2 (The clamping block and the clamping piece are separately arranged).

[0027] Figure 10 It is a schematic diagram of Embodiment 2 of the carrier assembly of the present invention Figure 1 (The clamping block and the clamping piece are arranged together).

[0028] Figure 11 It is a schematic diagram of Embodiment 2 of the carrier assembly of the present invention Figure 2 (The clamping block and the clamping piece are arranged together).

[0029] Figure 12 It is a structural schematic diagram of the anti-rotation assembly of the present invention.

[0030] Figure 13 It is a three-dimensional schematic diagram of the anti-rotation assembly of the present invention.

[0031] Reference numerals: Engine assembly line - A, First support frame - B, Second support frame - C, First moving assembly - D, First axial assembly - E, Support assembly - F, Fixing assembly - G, Carrier assembly - H, Second moving assembly - J, Second axial assembly - K, Base plate - 1, Support base - 2, Clamping slot - 2a, Mounting hole - 2b, Carrier - 3, Support curved surface - 3a, Fixing hole - 3b, Clamping projection - 3c, Clamping projection - 3d, Clamping block - 4, Clamping arc groove - 4a, First roller - 5, Roller shaft - 6, Clamping block - 7, Rotating disk - 8, Cover plate - 9, Anti - detachment disk - 10, Bearing - 11, Clamping shaft - 12, Anti - rotation block - 13, Anti - rotation seat - 14, Anti - rotation handle - 15, Anti - rotation clamping block - 16, Anti - rotation groove - 16a, Second roller - 17, Fitting disk - 18, Bin support - 18a, Crankshaft support - 18b, Connecting rod cap frame - 18c, Piston connecting rod frame - 18d, Main bearing cap area - 18e, Camshaft cap area - 18f, Fitting disk support - 19, Oil catch pan - 20, First axial cylinder - 21, Contact head - 22, Support plate - 23, Support cylinder - 24, Support pad - 25, Axial moving plate - 26, Second axial cylinder - 27, Torque motor - 28, Plug - 29, Upper clamping block - 30, Lower clamping block - 31, Clamping roller - 32, Clamping seat - 33, Clamping cylinder - 34, Coaxial rod - 35, Cylinder support - 36, Limiting cylinder - 37, Moving plate - 38, Moving cylinder - 39, Holding cylinder - 40. Detailed implementation mode

[0032] The present invention will be further described below through embodiments in conjunction with the accompanying drawings:

[0033] As Figure 1-13 shown, a device for measuring the rotational torque and axial clearance of a crankshaft during engine assembly mainly consists of a first support frame B, a second support frame C, a first moving assembly D, a first axial assembly E, a support assembly F, a fixing assembly G, a second moving assembly J, and a second axial assembly K. The first support frame B and the second support frame C are respectively arranged on the front and rear sides of the engine assembly line A. On the first support frame B, there is a first axial assembly E for pushing the crankshaft to move axially and a support assembly F for supporting the curved surface box body through the first moving assembly D. Moreover, the first moving assembly D can drive the first axial assembly E and the support assembly to move back and forth, that is, to move along the axial direction of the crankshaft.

[0034] A fixing component G capable of fixing the carrier 3 is arranged in the middle of the second support frame C, and the carrier 3 is arranged on a carrier component H that can flow on an engine assembly line A extending left and right. A second axial component K capable of pushing the crankshaft axially is also arranged on the second support frame C through a second moving component J, and the second moving component J can drive the second axial component K to move back and forth. By cooperating the second axial component K with the first axial component E, the rotational torque and axial clearance of the crankshaft can be tested.

[0035] The structures of the first moving component D and the second moving component J are the same, both including a moving plate 38 and a moving cylinder 39. The moving plate 38 is arranged on the corresponding support frame through a guide rail slider component, the moving cylinder 39 is arranged on the corresponding support frame, and the output end is arranged on the moving plate 38. When the moving cylinder works, it can drive the corresponding moving plate to move back and forth.

[0036] The specific structure of the first axial component E includes a first axial cylinder 21 arranged on the corresponding moving plate. A head 22 capable of abutting against the crankshaft is arranged at the output end of the first axial cylinder 21. When the first axial cylinder 21 works, it can push the crankshaft axially through the head 22, and the first axial cylinder can record the distance of pushing the crankshaft axially.

[0037] The specific structure of the support component F includes a support cylinder 24 arranged on the corresponding moving plate through a support plate 23, and a support pad 25 located below the crankshaft housing is arranged at the output end of the support cylinder 24. When the support cylinder 24 works, it can push the support pad 25 upward and make it support below the crankshaft housing.

[0038] The specific structure of the second axial component K includes an axially moving plate 26 arranged above the corresponding moving plate through a guide rail slider component and a second axial cylinder 27 capable of driving the axially moving plate 26 to move axially, and the second axial cylinder can record the distance of pushing the crankshaft axially. To measure the rotational torque, a torque motor 28 capable of driving the crankshaft to rotate and testing the torque is arranged on the axially moving plate 26. At the same time, a plug 29 inserted into the end of the crankshaft is arranged at the output end of the torque motor 28, and a mating groove is arranged at the position corresponding to the crankshaft pin on the plug 29.

[0039] In this application, through the cooperation of the second moving component and the torque motor, the plug can be inserted into the end of the crankshaft, and then the torque motor rotates to measure the torque of the crankshaft. The first axial cylinder first pushes the crankshaft backward, and then the second axial cylinder pushes the crankshaft forward. The thrust of the second axial cylinder is greater than that of the first axial cylinder. Therefore, through the cooperation of the first axial cylinder and the second axial cylinder, the axial clearance of the crankshaft can be measured.

[0040] After the plug is inserted into the crankshaft end, if the second moving component malfunctions, it will prevent normal torque measurement. A holding component is provided on the second moving component J to maintain the state of the moving plate 38. The holding component includes a holding cylinder 40. A holding hole is provided on the moving plate 38. When the second moving component J moves into place, the holding cylinder 40 operates and extends upward into the holding hole.

[0041] The carrier component includes a bottom plate 1 and a support seat 2. The bottom plate 1 is used to drive the entire carrier component to move along with the engine assembly line. The bottom plate 1 and the support seat 2 are connected by a rotating component that can rotate in the horizontal plane. The carrier 3 is snap-fitted onto the upper end of the support seat 2 from top to bottom. The rotating component is used to change the direction of the cylinder block placed on the carrier.

[0042] On the front side of the carrier 3, there is a support surface 3a that matches the cylinder block and is located inside the cylinder block. At the same time, on the support surface 3a, there are fixing holes 3b that extend front and back and can fix the cylinder block on the support surface. Fixing bolts for tightening the carrier and the cylinder block are provided in the fixing holes. To facilitate the fixation of the carrier component by each device on the engine assembly line, clamping protrusions 3c for the fixing component to clamp the carrier are provided at both the left and right ends of the rear side of the carrier 3. At both the upper and lower ends of each clamping protrusion 3c, there are clamping blocks 4 for easy clamping. Each clamping block 4 is provided with a clamping arc groove 4a facing the corresponding side. The clamping arc groove 4a of the upper clamping block faces upward, and the clamping arc groove 4a of the lower clamping block faces downward.

[0043] Since the carrier 3 is snap-fitted onto the upper end of the support seat 2 from top to bottom, the center of the support surface 3a can be below or above, and it is converted according to the assembly requirements of the crankcase.

[0044] To facilitate the snap-fitting between the carrier and the support seat, at both the left and right ends of the middle part of the carrier 3, there are extended clamping protrusions 3d. At the position of the support seat 2 corresponding to the clamping protrusions 3d, there are clamping grooves 2a. At the same time, on the front side, rear side, and bottom surface of the clamping groove 2a, there are first rollers 5 for reducing friction. The first rollers 5 are installed on the support seat 2 through corresponding roller shafts 6. To facilitate the installation of the roller shafts and the first rollers, installation holes 2b are provided on the support seat 2 at the positions corresponding to each roller shaft 6 and the first roller 5, and the heights of each first roller 5 are not equal.

[0045] Since the cylinder block is heavy, to increase the load-bearing capacity of the support seat, that is, to increase the contact area between the support seat and the carrier, clamping blocks 7 that match the clamping grooves are provided on the outside of each clamping protrusion 3d. The first rollers 5 are in contact with the clamping blocks 7. At the same time, the setting of the clamping blocks also prevents the length of the clamping protrusions from being too long, thereby reducing the risk of the clamping protrusions breaking.

[0046] In this embodiment, the clamping block and the clamping piece can also be integrally provided. At this time, there is no need to provide clamping protrusions and mounting protrusions on the carrier.

[0047] The rotating assembly includes a rotating disk 8 and a cover plate 9. The cover plate 9 is fixed above the bottom plate 1. The lower end of the rotating disk 8 passes through the middle of the cover plate 9 and is provided with an anti - detachment disk 10 located inside the bottom plate 1. To ensure the smooth rotation of the rotating disk, a bearing 11 is provided between the rotating disk and the cover plate 9. The bearing 11 can be set as a non - standard bearing formed by two inner and outer support rings and the rolling balls between the two support rings.

[0048] To prevent the rotating disk from rotating randomly when moving along with the assembly conveyor line, an anti - rotation assembly for preventing the rotation of the rotating disk 8 is provided on the rotating disk 8. The anti - rotation assembly includes an anti - rotation block 13, an anti - rotation seat 14, and an anti - rotation handle 15. The anti - rotation seat 14 is installed on the cover plate 9. The middle of the anti - rotation block 13 is hinged to the anti - rotation seat 14. An anti - rotation clamping block 16 is provided below the rotating disk 8. An anti - rotation groove 16a is provided along the radial direction of the rotating disk 8 on the bottom surface of the anti - rotation clamping block 16, and one end of the anti - rotation block 13 can be stuck in the anti - rotation groove 16a from below. The lower end of the anti - rotation handle 15 is arranged at the other end of the anti - rotation block 13. The weight of the other end of the anti - rotation block 13 is greater than that of one end, so that under the action of no external force, one end of the anti - rotation block 13 can always be inserted into the anti - rotation groove, thereby preventing the rotating disk from rotating. When the rotating disk needs to rotate, the other end of the anti - rotation block is lifted by the handle to achieve unlocking, and then the support seat can be rotated. In this embodiment, a plurality of anti - rotation clamping blocks can be provided at the bottom of the rotating disk as needed. Preferably, a notch for installing the anti - rotation clamping block is provided at the bottom of the rotating disk. To reduce friction, a second roller 17 protruding upward from the anti - rotation block is provided at one end of the anti - rotation block 13.

[0049] A fitting disk is equipped on the carrier assembly, and the fitting disk 18 is arranged on either the left or right side surface of the bottom plate 1 through a fitting disk bracket 19. On the fitting disk 18, there are provided a bin bracket 18a for placing the material box, a crankshaft bracket 18b for placing the crankshaft, a connecting rod cover rack 18c for placing the connecting rod cover, a piston - connecting rod rack 18d for placing the piston - connecting rod, a main bearing cover area 18e for placing the main bearing cover, a camshaft cover area 18f for placing the camshaft cover, etc., and each area can be set as needed.

[0050] To prevent the engine oil from dropping everywhere along with the assembly conveyor line during the engine assembly process, an oil - collecting tray 20 for collecting the engine oil is provided at the bottom of the support seat 2.

[0051] The specific structure of the fixing component G includes an upper clamping block 30 and a lower clamping block 31 which are arranged oppositely up and down, and two upper clamping blocks 30 and two lower clamping blocks 31 are respectively arranged at intervals left and right. Clamping rollers 32 are arranged on all the upper clamping blocks 30 and the lower clamping blocks 31 through clamping shafts 12. All the upper clamping blocks 30 are correspondingly arranged on the second support frame C, and each lower clamping block 31 is arranged on the second support frame C through a corresponding clamping component, and the clamping component can drive the lower clamping block 31 to move up and down, so as to realize the loosening or clamping of the bearing member 3.

[0052] The clamping component includes a clamping seat 33 and a clamping cylinder 34. The clamping seat 33 is arranged on the front side of the second support frame C. The rear side of the upper end of the lower clamping block 31 is hinged to the clamping seat 33, and the clamping shaft 12 and the clamping roller 32 on the lower clamping block 31 are arranged on the front side of the upper end of the lower clamping block 31. The clamping cylinder 34 is arranged on the rear side of the second support frame C, and the telescopic end of the clamping cylinder 34 passes through the second support frame C and is hinged to the rear side of the lower end of the lower clamping block 31. A coaxial rod 35 for keeping the two lower clamping blocks moving synchronously is also arranged between the two lower clamping blocks 31. The clamping cylinder is placed on the second support frame, and a baffle is arranged at the upper end of the clamping cylinder.

[0053] A limiting component for limiting the lower limit position of the lower clamping block 31 is also arranged on the second support frame C. The limiting component includes a limiting cylinder 37 arranged on the second support frame C through a cylinder bracket 36, and the output end of the limiting cylinder 37 extends left and right. When the limiting cylinder 37 works, the output end of the limiting cylinder 37 working can extend below the lower limit position of the lower clamping block 31.

[0054] To ensure that the lower clamping block can accurately clamp and fix the bearing member, a detection block is arranged at the rear side of the upper end of any one of the lower clamping blocks. At the same time, a position sensor for defining the two limit positions of the lower clamping block is arranged at the rear end of the second support frame through a sensor bracket, that is, the position of the lower clamping block is limited by the position sensor, so as to ensure that the bearing member can be accurately clamped and fixed.

[0055] During work, first fix the bearing member through the fixing component, then the first moving component and the second moving component work, so that the plug and the abutting head both abut on the two ends of the crankshaft. Then the support cylinder works, so that the support pad supports below the crankshaft housing. Then let the second moving component continue to work, and at the same time the torque motor also works, so that the plug can be inserted into the end of the crankshaft. Then keep the cylinder working to fix the position of the second moving component. Then let the torque motor work to measure the rotational torque of the crankshaft. After the rotational torque is measured, the first axial cylinder works first, and then the second axial cylinder works. Through the cooperation of the two axial cylinders, the axial clearance of the crankshaft is measured.

Claims

1. A measuring device for the rotational torque and axial clearance of a crankshaft during engine assembly, Characterized in that: It includes a first support frame (B) arranged on one side of the engine assembly line (A) and a second support frame (C) arranged on the other side of the engine assembly line. A first axial component (E) for pushing the crankshaft to move axially and a support component (F) for supporting the crankcase are arranged on the first support frame (B) through a first moving component (D). The first moving component (D) can drive the first axial component (E) and the support component to move back and forth. A fixing component (G) capable of fixing the bearing member (3) is arranged in the middle of the second support frame (C). The bearing member (3) is arranged on a bearing member assembly (H) that can flow on the engine assembly line (A) extending left and right. A second axial component (K) capable of pushing the crankshaft to move axially is arranged on the second support frame (C) through a second moving component (J). The second moving component (J) can drive the second axial component (K) to move back and forth. The second axial component (K) and the first axial component (E) cooperate to test the rotational torque and axial clearance of the crankshaft; The first axial component (E) includes a first axial cylinder (21) arranged on the first moving component (D). A head (22) that can abut against the crankshaft is arranged at the output end of the first axial cylinder (21). When the first axial cylinder (21) works, it can push the crankshaft to move axially through the head (22); The second axial component (K) includes an axially moving plate (26) arranged on the second moving component (J) through a guide rail slider component and a second axial cylinder (27) capable of driving the axially moving plate (26) to move axially. A torque motor (28) capable of driving the crankshaft to rotate and measuring torque is arranged on the axially moving plate (26). A plug (29) inserted into the end of the crankshaft is arranged at the output end of the torque motor (28), and a mating groove is arranged at the position corresponding to the crankshaft pin on the plug (29).

2. The measuring device for the rotational torque and axial clearance of a crankshaft during engine assembly according to claim 1, Characterized in that: The support component (F) includes a support cylinder (24) arranged on the first moving component (D) through a support plate (23). A support pad (25) located below the crankcase is arranged at the output end of the support cylinder (24). When the support cylinder (24) works, it can push the support pad (25) upward to support it below the crankcase.

3. The measuring device for the rotational torque and axial clearance of a crankshaft during engine assembly according to claim 1, Characterized in that: The fixed component (G) includes an upper clamping block (30) and a lower clamping block (31) which are arranged oppositely up and down, and two upper clamping blocks (30) and two lower clamping blocks (31) are respectively arranged at intervals left and right. Clamping rollers (32) are arranged on all the upper clamping blocks (30) and lower clamping blocks (31) through clamping shafts (12). All the upper clamping blocks (30) are correspondingly arranged on the second support frame (C). Each lower clamping block (31) is arranged on the second support frame (C) through a corresponding clamping component, and the clamping component can drive the lower clamping block (31) to move up and down, so as to realize the loosening or clamping of the carrier (3).

4. The device for measuring the crankshaft rotation torque and axial clearance during engine assembly according to claim 3, characterized in that: The clamping component includes a clamping seat (33) and a clamping cylinder (34). The clamping seat (33) is arranged on the front side of the second support frame (C). The rear side of the upper end of the lower clamping block (31) is hinged to the clamping seat (33). The clamping shaft (12) and the clamping roller (32) on the lower clamping block (31) are arranged on the front side of the upper end of the lower clamping block (31). The clamping cylinder (34) is arranged on the rear side of the second support frame (C), and the telescopic end of the clamping cylinder (34) passes through the second support frame (C) and is hinged to the rear side of the lower end of the lower clamping block (31). A coaxial rod (35) is also arranged between the two lower clamping blocks (31).

5. The device for measuring the crankshaft rotation torque and axial clearance during engine assembly according to claim 4, characterized in that: A limiting component for limiting the lower limit position of the lower clamping block (31) is further arranged on the second support frame (C). The limiting component includes a limiting cylinder (37) arranged on the second support frame (C) through a cylinder bracket (36). The output end of the limiting cylinder (37) extends left and right. When the limiting cylinder (37) works, the output end of the limiting cylinder (37) working can extend below the lower limit position of the lower clamping block (31).

6. The device for measuring the crankshaft rotation torque and axial clearance during engine assembly according to claim 1, characterized in that: The first moving component (D) and the second moving component (J) have the same structure, and both include a moving plate (38) and a moving cylinder (39). The moving plate (38) is arranged on the corresponding support frame through a guide rail slider assembly. The moving cylinder (39) is arranged on the corresponding support frame, and the output end is arranged on the moving plate (38).

7. The device for measuring the crankshaft rotation torque and axial clearance during engine assembly according to claim 6, characterized in that: A holding component for maintaining the state of the moving plate (38) is arranged on the second moving component (J). The holding component includes a holding cylinder (40). A holding hole is arranged on the moving plate (38). When the second moving component (J) moves in place, the holding cylinder (40) works and extends upward into the holding hole.

8. The device for measuring the crankshaft rotation torque and axial clearance during engine assembly according to claim 1, characterized in that: The carrier component (H) includes a bottom plate (1) and a support seat (2). The bottom plate (1) is used to drive the entire carrier component to move along with the engine assembly line. The carrier (3) is used to support and fix the cylinder block. The bottom plate (1) and the support seat (2) are connected by a rotating component that can rotate in the horizontal plane. The carrier (3) is clamped to the upper end of the support seat (2) from top to bottom. A support surface (3a) that matches the cylinder block and is located inside the cylinder block is provided on the front side of the carrier (3). Fixing holes (3b) that extend forward and backward and can fix the cylinder block on the support surface are provided on the support surface (3a). Clamping protrusions (3c) for the fixing component to clamp the carrier are provided at both the left and right ends of the rear side of the carrier (3). Clamping blocks (4) that facilitate clamping are provided at both the upper and lower ends of each clamping protrusion (3c). Clamping arc grooves (4a) facing the corresponding side are provided on each clamping block (4).

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