Diesel engine part assembling device

Abstract

The invention relates to the technical field of part assembling, and particularly discloses a diesel engine part assembling device which comprises a rack, a conveying mechanism used for conveying workpieces is arranged on the rack, multiple sets of tightening mechanisms corresponding to threaded holes in the workpieces in a one-to-one mode are further arranged on the rack, and each tightening mechanism comprises a barrel, a rotating shaft and a clamping assembly. The rotating shaft is located on the inner side of the barrel and is coaxial with the barrel, the barrel and the rotating shaft are both in lifting fit with the rack, the rotating shaft is in spiral lifting fit with the barrel at the same time, and the rotating shaft is in rotating fit with the barrel at the tail end of the stroke of the rotating shaft and the barrel. The clamping assembly is located at the lower end of the rotating shaft and used for movably clamping the end of the bolt. According to the assembling device, the tightening quality of the bolt on the diesel engine and the working efficiency of tightening operation are improved.

Description

Technical Field

[0001] The invention relates to the technical field of parts assembly, and in particular to a diesel engine parts assembly device. Background Art

[0002] In the production process of diesel engines, bolts are needed to fix the cylinder head and the cylinder block. In order to ensure the processing quality of the diesel engine, it is necessary to ensure that the bolts are fully tightened to avoid air leakage, water leakage, and oil leakage caused by poor bolt tightening quality. In order to ensure work efficiency, the bolts are often tightened by a bolt tightening device in related technologies.

[0003] The patent document with the authorization announcement number CN108839664B discloses a bolt tightening device, including a tightening assembly for tightening bolts, a first driving assembly for driving the tightening assembly to move along the Y direction, a second driving assembly connected to the first driving assembly and driving the tightening assembly to move along the X direction, and a detection assembly for detecting the model of the engine cylinder head. The tightening assembly includes a plurality of tightening shafts, each of which is provided with a bolt sleeve at the lower end, and the tightening shaft can rotate around its own axis and drive the bolt sleeve to rotate; The bolt tightening device of the patent document detects the model of the engine cylinder head through the detection component, and then the first drive component and the second drive component drive the tightening component to adjust the position according to the model of the engine cylinder head, and then drives the bolt sleeve to identify the cap by reversing the tightening shaft to ensure that the bolt sleeve can be aligned with the bolt on the engine cylinder head, and then drives the bolt sleeve to tighten the bolt by rotating the tightening shaft forward, and can adjust the torque of the bolt through the tightening shaft as needed to ensure that each bolt reaches the required torque, thereby improving the tightening efficiency and tightening quality.

[0004] During the production process, manual operation is required to place the bolts in the corresponding threaded holes of the engine cylinder head. Due to the long length of the bolts, when the bolts are placed in the threaded holes, the axial direction of the bolts will generally deviate from the axial direction of the threaded holes by a certain angle. When the bolts are tightened by the tightening device, the bolts may not be smoothly assembled with the threaded holes, and even the bolts or the threaded holes may be damaged. In addition, manually placing the bolts in the threaded holes will also cause different bolts to leak out of the threaded holes at different heights, which makes it inconvenient to tighten the bolts uniformly later. Summary of the invention

[0005] The present invention provides a diesel engine parts assembly device, aiming to solve the problem that the bolt tightening device in the related art cannot adjust the angle of the bolt when the bolt is off-axis with the threaded hole when tightening the bolt, and is inconvenient to adapt to bolts with different protruding heights, resulting in the problem that the bolt tightening quality is affected.

[0006] The diesel engine parts assembly device of the present invention includes a frame, on which a conveying mechanism for conveying workpieces is provided, and on which a plurality of tightening mechanisms corresponding one to one with the threaded holes on the workpieces are also provided, and the tightening mechanism includes a cylinder, a rotating shaft and a clamping assembly, wherein the rotating shaft is located inside the cylinder and is coaxially arranged with the cylinder, and the cylinder and the rotating shaft are both coordinated with the frame for lifting and lowering, and the rotating shaft is also coordinated with the spiral lifting and lowering of the cylinder, and the rotating shaft is rotatably coordinated with the cylinder at the end of its stroke with the cylinder, and the clamping assembly is located at the lower end of the rotating shaft and is used to movably clamp the end of the bolt.

[0007] The beneficial effects are as follows: the assembly efficiency and assembly quality of the diesel engine are improved; the rotating shaft of the tightening mechanism and the cylinder are spirally lifted and lowered in coordination, and rotated at the end of the stroke, so that the tightening position of the bolt can be accurately controlled; after the conveying mechanism conveys the workpiece to the lower side of the tightening mechanism, the cylinder and the rotating shaft move downward relative to the frame, and the clamping assembly on the lower side of the rotating shaft clamps and fixes the bolt, and then the clamping assembly descends with the rotation of the rotating shaft, and gradually tightens the bolt; the clamping assembly can flexibly clamp the end of the bolt to ensure that the bolt will not deviate during the tightening process, thereby improving the stability of the bolt position during the tightening process, thereby improving the assembly accuracy, reducing the deviation of the bolt relative to the threaded hole on the workpiece, and facilitating the bolt to be smoothly screwed into the threaded hole; and in the process of the clamping assembly clamping the bolt, the axial direction of the bolt is adjusted to keep the axial direction of the bolt consistent with the threaded hole, thereby improving the tightening quality of the bolt, and at the same time ensuring the assembly quality of the diesel engine, and reducing the problems of water leakage, air leakage and oil leakage of the diesel engine caused by poor bolt tightening quality; In addition, the rotating shaft and the cylinder are spirally lifted and lowered, so that when the bolt encounters resistance when being screwed in, the clamping assembly can be used to clamp the bolt and screw it out relative to the threaded hole, and the thread cooperation between the bolt and the threaded hole can be readjusted to avoid the problem of the bolt and the threaded hole being stuck or being damaged due to over-tightening.

[0008] Preferably, the clamping assembly includes a connecting member, a clamping member, a guide member and a connecting rod. The connecting member is located at the lower side of the rotating shaft. There are multiple clamping members. Each clamping member longitudinally penetrates the connecting member and slides with the connecting member along the radial direction of the connecting member. The guide member is spirally lifted and lowered with the rotating shaft. A connecting rod is hinged at the upper end of each clamping member. The upper end of the connecting rod is hinged to the guide member. A stop block is provided on the side wall of the cylinder, and the lower end face of the connecting member is movably abutted against the stop block.

[0009] The beneficial effects are: achieving high-precision and flexible clamping operation on the bolt, the spiral lifting and lowering cooperation of the guide part and the rotating shaft can accurately control the movement trajectory of the clamping part, ensuring that the clamping part always maintains coaxiality with the bolt during the tightening process, thereby improving the clamping accuracy, the block on the side wall of the cylinder and the lower end surface of the connecting part movably abut against each other, playing a limiting role, preventing the clamping assembly from excessive movement during the tightening process, and further ensuring the stability and accuracy of the clamping, the clamping part can automatically adjust the clamping force according to the tightening torque of the bolt through the linkage of the connecting rod and the guide part, avoiding damage to the bolt or unstable clamping due to excessive or insufficient clamping force, the clamping part slides along the radial direction of the connecting part, can adapt to bolts of different diameters and shapes, and improves the versatility and adaptability of the clamping assembly.

[0010] Preferably, the lower end of the rotating shaft is elastically connected to the connecting member.

[0011] The beneficial effect is that when the clamping assembly moves upward with the rotating shaft to screw out the bolt in the reverse direction, the bolt is prevented from detaching from the clamping assembly, the rotating shaft and the connecting piece are elastically connected, which effectively ensures the abutment strength between the connecting piece and the upper end surface of the bolt, and prevents the bolt from being screwed out synchronously with the clamping assembly when the clamping assembly is reversed.

[0012] Preferably, a second spiral groove is provided on the outer side of the lower end of the rotating shaft, and the guide member is slidably matched with the second spiral groove.

[0013] Preferably, a detection member is provided at the lower end of each clamping member, and the detection member is used to detect the distance between the clamping member and the surface of the workpiece.

[0014] The beneficial effects are: it is convenient to flexibly detect the tightening progress of the bolt, reduce the dependence on manual operation, and improve the work efficiency of the bolt tightening operation.

[0015] Preferably, an annular guide plate is also fixed on the rotating shaft, and the inner wall of the cylinder is provided with a spiral groove, and the guide plate is slidably matched with the spiral groove, and a guide cylinder is provided on the lower side of the guide plate, and the guide cylinder is rotatably sleeved on the outside of the rotating shaft, and the guide cylinder is connected to a driving structure that drives it to rotate relative to the rotating shaft, and the guide member is lifted and lowered in coordination with the guide cylinder.

[0016] Preferably, the driving structure includes a driving member, gear one and gear two, the driving member is fixed on the guide plate, the gear one is fixed to the driving end of the driving member, the gear two is fixed to the guide cylinder, and the gear one is meshed with the gear two.

[0017] Preferably, the lower end of the rotating shaft is also elastically connected to a touch rod, and the touch rod is longitudinally slidably matched with the rotating shaft.

[0018] Preferably, the side wall of the cylinder is also provided with a lubrication assembly, which includes a liquid inlet pipe, a guide pipe and a liquid outlet pipe, the liquid inlet pipe is connected to the guide pipe, the liquid outlet pipe is rotatably matched with the guide pipe and elastically connected, and the liquid outlet end of the liquid outlet pipe extends to the lower side of the bolt cap and elastically abuts against the bolt.

[0019] The beneficial effect is that when the bolt is pulled out due to resistance during tightening, the rod part of the bolt is lubricated, thereby reducing the friction between the bolt and the threaded hole when the bolt is tightened again, and facilitating smooth screwing of the bolt.

[0020] Preferably, the liquid inlet pipe is also connected to a liquid inlet device, and the lubricating liquid is stored in the liquid inlet device.

[0021] The beneficial effects of the present invention are: (1) The assembly efficiency and quality of the diesel engine are improved. The rotating shaft of the tightening mechanism and the cylinder are spirally lifted and lowered, and rotated at the end of the stroke, which can accurately control the tightening position of the bolt. After the conveying mechanism conveys the workpiece to the lower side of the tightening mechanism, the cylinder and the rotating shaft move downward relative to the frame, and the clamping assembly on the lower side of the rotating shaft clamps and fixes the bolt. Then the clamping assembly descends with the rotation of the rotating shaft and gradually tightens the bolt. The clamping assembly can flexibly clamp the end of the bolt to ensure that the bolt will not shift during the tightening process, thereby improving the stability of the bolt position during the tightening process, thereby improving the assembly accuracy, reducing the displacement of the bolt relative to the threaded hole on the workpiece, and facilitating the bolt to be smoothly screwed into the threaded hole. In the process of clamping the bolt, the clamping assembly adjusts the axial direction of the bolt to keep the axial direction of the bolt consistent with the threaded hole, thereby improving the tightening quality of the bolt and ensuring the assembly quality of the diesel engine. It also reduces the water leakage, air leakage, and oil leakage problems caused by poor bolt tightening quality in the diesel engine. In addition, the rotating shaft and the cylinder are spirally lifted and lowered, so that when the bolt encounters resistance when being screwed in, the clamping assembly can be used to clamp the bolt and screw it out relative to the threaded hole, and the thread cooperation between the bolt and the threaded hole can be readjusted to avoid the problem of the bolt and the threaded hole being stuck or being damaged due to over-tightening.

[0022] (2) High-precision and flexible clamping operation of the bolt is achieved. The spiral lifting and lowering cooperation of the guide part and the rotating shaft can accurately control the movement trajectory of the clamping part, ensuring that the clamping part always maintains coaxiality with the bolt during the tightening process, thereby improving the clamping accuracy. The block on the side wall of the cylinder and the lower end surface of the connecting part are movably abutted to play a limiting role, preventing the clamping component from excessive movement during the tightening process, further ensuring the stability and accuracy of the clamping. The clamping part can automatically adjust the clamping force according to the tightening torque of the bolt through the linkage of the connecting rod and the guide part, avoiding damage to the bolt or unstable clamping due to excessive or insufficient clamping force. The clamping part slides along the radial direction of the connecting part, which can adapt to bolts of different diameters and shapes, thereby improving the versatility and adaptability of the clamping component. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 yes Figure 1 main view.

[0025] Figure 3 It is a schematic diagram of the structure inside the cylinder in the present invention.

[0026] Figure 4 It is a structural schematic diagram of the connection between the clamping assembly and the rotating shaft in the present invention.

[0027] Figure 5 It is a schematic diagram of the state of the clamping bolt of the clamping assembly in the present invention.

[0028] Figure 6 yes Figure 5 main view.

[0029] Figure 7 It is a schematic diagram of the matching relationship among the guide cylinder, the guide member and the rotating shaft in the present invention.

[0030] Reference numerals: 1. Frame; 11. Workpiece; 2. Cylinder; 21. Spiral groove 1; 22. Rotating shaft; 23. Guide plate; 24. Driving member; 25. Guide cylinder; 26. Spiral groove 2; 27. Touch rod; 3. Connecting member; 31. Guide member; 32. Clamping member; 33. Connecting rod; 34. Compression spring; 4. Liquid inlet pipe; 41. Guide pipe; 42. Liquid outlet pipe; 5. Bolt. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0032] like Figure 1 and Figure 2 As shown, the diesel engine parts assembly device of the present invention includes a frame 1, and a conveying mechanism and a tightening mechanism are provided on the frame 1. The conveying mechanism is used to convey the workpiece 11 to be assembled. The conveying mechanism can convey the workpiece 11 through a conveyor belt. The specific structure and working method of the conveying mechanism belong to the prior art and will not be described in detail here. A plurality of threaded holes are provided on the workpiece 11 to be assembled. During the conveying process, the staff puts the bolts 5 into each threaded hole one by one. The workpiece 11 moves to the tightening mechanism with the conveying mechanism, and the tightening mechanism tightens the bolts 5 placed in the threaded holes. A plurality of sets of tightening mechanisms are provided on the frame 1, and each set of tightening mechanisms corresponds to the position of each threaded hole on the workpiece 11 one by one. To avoid cluttered lines, only one set of tightening mechanisms is shown in the figure.

[0033] like Figures 3 to 7 As shown, the tightening mechanism includes a barrel 2, a rotating shaft 22 and a clamping assembly. The barrel 2 is cylindrical. The barrel 2 and the rotating shaft 22 are both in coordination with the frame 1 for lifting and lowering. The barrel 2 and the rotating shaft 22 can be synchronously driven to lift and lower by a cylinder. The rotating shaft 22 is located on the inner side of the barrel 2 and is coaxially arranged with the barrel 2. The frame 1 is also provided with a motor for driving the rotating shaft 22 to rotate around its own axis. An annular guide plate 23 is fixed to the rotating shaft 22. A spiral groove 21 is provided on the inner wall of the barrel 2. The lower end of the spiral groove 21 is annular. The edge of the guide plate 23 is provided with a convex block that slides with the spiral groove 21. The motor drives the rotating shaft 2 When the guide plate 23 rotates, it rotates synchronously with the shaft 22, and the guide plate 23 slides relative to the spiral groove 21. When the guide plate 23 and the spiral groove 21 are slidably matched, the shaft 22 rotates and rises and falls relative to the cylinder 2. When the guide plate 23 moves to the lower end of the spiral groove 21, if the guide plate 23 does not change the rotation direction, it rotates and cooperates with the annular part of the spiral groove 21, that is, the guide plate 23 rotates along the same direction with the shaft 22 to the end of the stroke of the spiral groove 21 and then only rotates and cooperates with the cylinder 2. After the motor drives the shaft 22 to rotate in the reverse direction, the guide plate 23 rotates and moves upward along the spiral groove 21.

[0034] The clamping assembly is used to flexibly clamp the end of the bolt 5. The clamping assembly includes a connecting piece 3, a clamping piece 32, a guide piece 31 and a connecting rod 33. The connecting piece 3 is coaxial with the rotating shaft 22 and is located at the lower side of the rotating shaft 22. The connecting piece 3 can be an annular plate. The guide piece 31 is located on the upper side of the connecting piece 3 and is spirally lifted and lowered with the rotating shaft 22. A spiral groove 26 is provided on the outer side of the lower end of the rotating shaft 22. The guide piece 31 is sleeved on the outer side of the rotating shaft 22 and slidably cooperates with the spiral groove 26. The connecting piece 3 is evenly provided with a plurality of sliding grooves in the circumferential direction. The sliding grooves are arranged along the radial direction of the connecting piece 3. There are a plurality of clamping pieces 32, and preferably six clamping pieces 32 are arranged. When the clamping assembly clamps the bolt 5, each clamping piece 32 is respectively connected to the end of the bolt 5. The side surfaces of the parts are fitted together, and each clamping piece 32 longitudinally penetrates the connecting piece 3, and slides with each slide groove one by one along the radial direction of the connecting piece 3. The number of connecting rods 33 is consistent with the clamping pieces 32, and each connecting rod 33 is connected to each clamping piece 32 in a one-to-one correspondence. One end of the connecting rod 33 is hinged to the clamping piece 32, and the other end of the connecting rod 33 is hinged to the guide piece 31. When the guide piece 31 and the connecting piece 3 are relatively far away from each other, the connecting rod 33 pushes each clamping piece 32 to approach the axial direction of the rotating shaft 22, and each clamping piece 32 is used to clamp and fix the end of the bolt 5. When the guide piece 31 and the connecting piece 3 are relatively close to each other, the connecting rod 33 pushes each clamping piece 32 away from the axial direction of the rotating shaft 22, and each clamping piece 32 is separated from the end of the bolt 5.

[0035] The connecting piece 3 slides against the inner wall of the cylinder 2, and a stopper is provided on the lower side of the inner wall of the cylinder 2. The connecting piece 3 movably abuts against the stopper, and when the connecting piece 3 abuts against the stopper, the stopper blocks the connecting piece 3 from moving downward relative to the cylinder 2. The rotating shaft 22 and the connecting piece 3 are also elastically connected by a compression spring 34. After the workpiece 11 moves into place with the conveying mechanism, the tightening mechanism is longitudinally opposite to the threaded hole on the workpiece 11, and the cylinder 2 and the rotating shaft 22 move downward as a whole until the cylinder 2 cover is arranged on the outside of the bolt 5. When the motor drives the rotating shaft 22 to rotate, Under the guiding action of the guide plate 23 and the spiral groove 21, the rotating shaft 22 moves downward relative to the cylinder 2 while rotating in the cylinder 2, and the connecting member 3 stops moving after abutting against the block, and the rotating shaft 22 continues to move downward, the compression spring 34 is squeezed, and the guide member 31 and the connecting member 3 are relatively close to each other, and each clamping member 32 is away from the axial direction of the rotating shaft 22, and the cylinder 2 and the rotating shaft 22 continue to be driven to move downward as a whole until each clamping member 32 is on the outside of the end of the bolt 5, and each clamping member 32 is in an open state and opposite to the end of the bolt 5.

[0036] In order to facilitate the control of the downward movement distance of the cylinder 2 and the rotating shaft 22, the lower end of the rotating shaft 22 is also elastically connected to a feeler rod 27, and the feeler rod 27 is longitudinally slidably matched with the rotating shaft 22. The feeler rod 27 can be connected to the rotating shaft 22 through a spring. When the spring is naturally stretched, the lower end of the feeler rod 27 is located at the lower side of the clamping member 32. The rotating shaft 22 is also connected to a pressure sensor, and the upper end of the spring abuts against the pressure sensor. The frame 1 is also provided with a control unit. When the rotating shaft 22 descends to abut against the upper end surface of the bolt 5, the spring is squeezed and triggers the pressure sensor. The pressure sensor monitors the pressure change and feeds back the monitoring signal to the control unit. The control unit stops the cylinder driving the cylinder 2 and the rotating shaft 22 to move downward synchronously, and the motor continues to drive the rotating shaft 22 to rotate. While the rotating shaft 22 rotates, it moves downward relative to the cylinder 2, the feeler rod 27 is continuously compressed, and after the connecting member 3 contacts the block, each clamping member 32 opens relative to the end of the bolt 5. When each clamping member 32 moves to the side around the end of the bolt 5, the motor no longer drives the rotating shaft 22 to rotate.

[0037] The guide member 31 is also connected to a driving structure that drives it to rotate. The driving structure includes a driving member 24, a gear 1 and a gear 2. The driving member 24 is fixed on the guide plate 23. The driving member 24 can be a motor. The gear 1 is fixed to the driving end of the driving member 24. A guide cylinder 25 is rotatably sleeved on the outer side of the rotating shaft 22. The guide member 31 is longitudinally slidably matched with the guide cylinder 25. The gear 2 is fixed to the guide cylinder 25. The gear 1 is meshed with the gear 2. After the rotating shaft 22 stops rotating, the driving member 24 is started. The driving member 24 drives the guide cylinder 25 to rotate through the gear 1 and the gear 2. In other embodiments, the driving member 24 can also drive the guide cylinder 25 to rotate through a transmission belt or a transmission chain. The guide member 31 rotates with the guide cylinder 2 5 rotates synchronously. When the guide member 31 rotates, it moves upward relative to the rotating shaft 22 under the guiding action of the spiral groove 26. The spacing between the guide member 31 and the connecting member 3 gradually increases. Each connecting rod 33 pushes each clamping member 32 to move in the direction close to the axial direction of the rotating shaft 22. Each clamping member 32 gradually abuts against the end of the bolt 5. When the bolt 5 is manually placed in the threaded hole, the axial direction of the bolt 5 is generally deflected relative to the axial direction of the threaded hole. When each clamping member 32 gradually approaches the axial direction of the rotating shaft 22 and clamps the bolt 5, the axial direction of the bolt 5 can be adjusted while clamping and fixing the bolt 5, so that the axial direction of the bolt 5 is consistent with the axial direction of the threaded hole, which is convenient for the tightening mechanism to smoothly screw the bolt 5 into the threaded hole.

[0038] After the clamping assembly completes clamping and fixing the bolt 5, the driving member 24 stops working, and the cylinder that drives the barrel 2 and the rotating shaft 22 to descend and the motor that drives the rotating shaft 22 to rotate are restarted. At this time, the guide plate 23 has moved to the lower end of the spiral groove 21. In this rotation direction, the guide plate 23 and the rotating shaft 22 only rotate relative to the shell and no longer move downward relative to the barrel 2. The rotating shaft 22 and the barrel 2 descend synchronously, and the clamping assembly rotates and descends with the rotating shaft 22 and screws the bolt 5 into the threaded hole.

[0039] If, during the operation of screwing in the bolt 5, the bolt 5 and the threaded hole are blocked, the bolt 5 cannot be screwed in smoothly, that is, the bolt 5 does not rotate with the clamping assembly. When the clamping assembly rotates with the shaft 22, each clamping member 32 is squeezed by the end of the bolt 5 and moves in a direction away from the axial direction of the shaft 22, and pushes the connecting member 3 to move upward to overcome the elastic force of the compression spring 34. At this time, the shaft 22 moves downward. Since the position of the bolt 5 no longer changes, the pressure of the feeler rod 27 squeezing the spring increases. After the pressure sensor detects the pressure change, it feeds back a signal to the control unit. , and stop driving the cylinder 2 and the rotating shaft 22 to move downward to avoid damage to the bolt 5 and the threaded hole when forcibly tightening. Then the motor reverses to drive the rotating shaft 22 to rotate, and the guide plate 23 rotates with the rotating shaft 22 and rotates upward relative to the cylinder 2. The clamping assembly clamps the bolt 5 and moves upward with the rotating shaft 22, and pulls the bolt 5 out of the threaded hole for a distance, and then tightens the bolt 5. Adjust the bolt 5 to align the threads of the bolt 5 and the threaded hole, so that the bolt 5 can be pulled out and adjusted again after the bolt 5 is blocked from being screwed in, to ensure that the bolt 5 is screwed in smoothly.

[0040] In order to further ensure the smooth screwing of the bolt 5, lubricating oil can also be added to the rod of the bolt 5 when the bolt 5 is withdrawn from the threaded hole to improve the lubrication condition of the contact surface between the bolt 5 and the threaded hole. A lubrication assembly is also provided on the side wall of the cylinder 2. The lubrication assembly includes a liquid inlet pipe 4, a guide pipe 41 and a liquid outlet pipe 42. The liquid inlet pipe 4 is connected to a liquid inlet device. The lubricating liquid is stored in the liquid inlet device. The lubricating liquid in the liquid inlet device can be pumped into the liquid inlet pipe 4 by a pump body. The liquid inlet pipe 4 is connected to the guide pipe 41, and the liquid outlet pipe 42 is connected to the guide pipe 41. 41 is rotated to fit and elastically connected, the liquid outlet pipe 42 and the guide pipe 41 can be connected by a torsion spring, the liquid outlet end of the liquid outlet pipe 42 extends to the lower side of the bolt cap and elastically abuts against the bolt 5, and the end of the liquid outlet pipe 42 abuts against the bolt 5 under the action of the torsion spring. When the bolt 5 is pulled out relative to the threaded hole, the pump body can be started to pump the lubricating liquid into the liquid inlet pipe 4, the lubricating liquid further enters the guide pipe 41 and flows out from the liquid outlet pipe 42, and the outflowing lubricating liquid contacts the rod body of the bolt 5, thereby reducing the friction when the bolt 5 is screwed into the threaded hole again.

[0041] To facilitate the detection of whether the bolt 5 is screwed in place, a detection piece is provided at the lower end of the clamping piece 32. The detection piece is used to detect the distance between the clamping piece 32 and the surface of the workpiece 11. The detection piece can also be a pressure sensor. The detection piece is elastically connected to the clamping piece 32. After the bolt 5 is fully screwed in, the lower end of the clamping piece 32 contacts the surface of the workpiece 11 and squeezes the pressure sensor. After the pressure sensor is squeezed, it can transmit a signal to the control unit. After the control unit determines that the bolt 5 is screwed in place, it retracts the tightening mechanism and restores the initial state of the tightening mechanism, and after the subsequent workpiece 11 moves into place, continues to tighten the bolt 5 on the subsequent workpiece 11.

[0042] The diesel engine parts assembly device provided by the present invention is convenient for automatically adjusting the axial angle of the bolt when tightening the bolt, so that the axial direction of the bolt is consistent with the axial direction of the threaded hole, which is convenient for the bolt to be screwed in smoothly. When the bolt is blocked from being screwed in, the bolt is pulled out and the thread alignment of the bolt and the threaded hole is readjusted, thereby improving the assembly effect of the diesel engine and reducing the intervention of manual operation during the assembly process.

[0043] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A diesel engine parts assembly device, comprising a frame (1), wherein the frame (1) is provided with a conveying mechanism for conveying a workpiece (11), characterized in that: The frame (1) is also provided with a plurality of tightening mechanisms corresponding to the threaded holes on the workpiece (11). The tightening mechanisms include a cylinder (2), a rotating shaft (22) and a clamping assembly. The rotating shaft (22) is located inside the cylinder (2) and is coaxially arranged with the cylinder (2). The cylinder (2) and the rotating shaft (22) are both lifted and lowered in coordination with the frame (1). The rotating shaft (22) is also lifted and lowered in coordination with the cylinder (2) in a spiral manner. The rotating shaft (22) is rotationally engaged with the cylinder (2) at the end of its stroke with the cylinder (2). The clamping assembly is located at the lower end of the rotating shaft (22) and is used to movably clamp the end of the bolt (5).

2. The diesel engine parts assembly device according to claim 1, characterized in that: The clamping assembly comprises a connecting member (3), a clamping member (32), a guide member (31) and a connecting rod (33). The connecting member (3) is located at the lower side of the rotating shaft (22). There are a plurality of clamping members (32). Each clamping member (32) longitudinally penetrates the connecting member (3) and is slidably matched with the connecting member (3) along the radial direction of the connecting member (3). The guide member (31) is spirally lifted and lowered with the rotating shaft (22). The upper end of each clamping member (32) is hingedly connected to a connecting rod (33). The upper end of the connecting rod (33) is hingedly connected to the guide member (31). A stopper is provided on the side wall of the cylinder (2), and the lower end surface of the connecting member (3) is movably abutted against the stopper.

3. The diesel engine parts assembly device according to claim 2, characterized in that: The lower end of the rotating shaft (22) is elastically connected to the connecting member (3).

4. The diesel engine parts assembly device according to claim 2, characterized in that: A second spiral groove (26) is provided on the outer side of the lower end of the rotating shaft (22), and the guide member (31) is slidably matched with the second spiral groove (26).

5. The diesel engine parts assembly device according to claim 2, characterized in that: A detection member is provided at the lower end of each clamping member (32), and the detection member is used to detect the distance between the clamping member (32) and the surface of the workpiece (11).

6. The diesel engine parts assembly device according to claim 2, characterized in that: An annular guide plate (23) is also fixed on the rotating shaft (22). The inner wall of the cylinder (2) is provided with a spiral groove (21). The guide plate (23) is slidably matched with the spiral groove (21). A guide cylinder (25) is provided on the lower side of the guide plate (23). The guide cylinder (25) is rotatably sleeved on the outer side of the rotating shaft (22). The guide cylinder (25) is connected to a driving structure for driving it to rotate relative to the rotating shaft (22). The guide member (31) is lifted and lowered in coordination with the guide cylinder (25).

7. The diesel engine parts assembly device according to claim 6, characterized in that: The driving structure comprises a driving member (24), a first gear and a second gear, wherein the driving member (24) is fixed on the guide plate (23), the first gear is fixed to the driving end of the driving member (24), the second gear is fixed to the guide cylinder (25), and the first gear is meshed with the second gear.

8. The diesel engine parts assembly device according to claim 1, characterized in that: The lower end of the rotating shaft (22) is also elastically connected to a touch rod (27), and the touch rod (27) is longitudinally slidably matched with the rotating shaft (22).

9. The diesel engine parts assembly device according to claim 1, characterized in that: The side wall of the cylinder (2) is also provided with a lubrication assembly, the lubrication assembly comprising a liquid inlet pipe (4), a flow guide pipe (41) and a liquid outlet pipe (42), the liquid inlet pipe (4) being in communication with the flow guide pipe (41), the liquid outlet pipe (42) being rotationally matched with and elastically connected to the flow guide pipe (41), and the liquid outlet end of the liquid outlet pipe (42) extending to the lower side of the bolt cap and elastically abutting against the bolt (5).

10. The diesel engine parts assembly device according to claim 9, characterized in that: The liquid inlet pipe (4) is also connected to a liquid inlet device, and lubricating liquid is stored in the liquid inlet device.

Images