Transverse fine adjustment mechanism for crankshaft grinding positioning

Abstract

The present application relates to the technical field of crankshaft processing, and discloses a transverse fine adjustment mechanism for crankshaft grinding positioning, which comprises two mounting discs, a sliding plate is slidingly mounted on the mounting discs, a mounting groove is formed in the sliding plate, a rotating seat is rotatably mounted in the mounting groove, a top plate is arranged on the top surface of the rotating seat, three guide grooves are formed in the top plate and arranged in a ring array, and a clamping jaw is slidingly mounted in the guide groove; a counterweight plate is symmetrically and fixedly mounted on one end of the mounting disc close to the sliding plate, a counterweight frame is slidingly mounted on the counterweight plate, and a plurality of counterweight blocks are arranged on the counterweight frame; the position of the crankshaft can be adjusted in multiple degrees of freedom through the sliding of the mounting disc, so that the connecting rod journal can be conveniently moved to the corresponding position, without the need for repeated disassembly and assembly operations on the crankshaft, time and labor costs are saved, the mass on both sides of the shaft center is balanced through the counterweight frame and the counterweight blocks, the whole equipment is more stable, and the use safety of the equipment is protected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of crankshaft machining, in particular to a transverse fine adjustment mechanism for crankshaft grinding positioning. BACKGROUND

[0002] The crankshaft is the core power transmission component of the engine, which is a multi-convex crank structure. It converts the reciprocating linear motion of the piston into rotary motion through the connecting rod. The main journal and the connecting rod journal are alternately distributed with a certain eccentricity. It is widely used in power systems in the fields of automobiles, ships, engineering machinery, etc. Crankshaft grinding machining is to use high-precision numerical control grinding machine to realize one-time clamping with the main journal center line as the rotation reference by tracking grinding method or swing grinding process, and to complete the precision grinding of the main journal and the connecting rod journal in turn, to realize the whole process high-precision machining from rough grinding to fine grinding, and to meet the stringent requirements of the engine on the strength, stiffness and wear resistance of the crankshaft.

[0003] Through retrieval, the Chinese utility model patent with the publication number CN215147480U discloses a transverse fine adjustment mechanism for crankshaft grinding positioning, which comprises a large disc, a chuck fixing block, a chuck, a pressure plate, a cylindrical pin, a support rod, a first support block, a first screw rod, a disc spring, a pin shaft, a pin, a nut, a second screw rod, a second support block, a toothed inclined block and a reverse toothed inclined block. When adjusting the crankshaft, the inclined blocks are pushed by the screw rods left and right, the support rods are pushed by the inclined blocks, and the side first support blocks are adjusted with the support rods. The chuck is fixed on a special socket disc, which can realize adjustment of the connecting rod journal at different phase angles. The accurate angle is completed by the fine adjustment mechanism, which solves the problems of long adjustment time and very troublesome operation of the left and right positions of the traditional crankshaft grinding fine adjustment mechanism, and improves the grinding efficiency of the main journal.

[0004] When grinding the connecting rod journal, the clamping direction of the machining platform is still the main shaft axis direction as the axis, but the rotation axis during rotary grinding is the rotating connecting rod journal. At this time, since most of the mass of the crankshaft is located on the side of the connecting rod journal, the equipment needs to overcome the large inertia of the crankshaft during rotary machining, which can greatly affect the stability of the equipment and easily cause the equipment to vibrate under the large inertia, thereby causing machining errors and affecting the machining quality. In addition, since the crankshaft often contains multiple connecting rod journals with different axis directions, when machining different connecting rod journals, not only the deviation between the machining axis and the connecting rod journal axis needs to be adjusted by fine adjustment, but also the angle deviation between the connecting rod journal axis and the main shaft axis needs to be adjusted by fine adjustment, in order to ensure accurate machining of the connecting rod journal. When manually adjusting, not only is the operation complex and difficult, but also the crankshaft needs to be repeatedly clamped and unclamped, which makes adjustment inconvenient.

[0005] Therefore, a transverse fine adjustment mechanism for crankshaft grinding positioning is needed to solve the above problems. SUMMARY

[0006] The transverse fine adjustment mechanism for crankshaft grinding positioning is provided to solve the problems in the prior art.

[0007] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0008] The transverse fine adjustment mechanism for crankshaft grinding positioning comprises two mounting plates, a sliding plate slidably mounted on the mounting plates, a driving motor fixedly mounted on the mounting plates, a worm fixedly mounted on the output end of the driving motor, gear teeth fixedly mounted on the bottom of the sliding plate and matched with the worm, an installation groove formed in the sliding plate, a rotating seat rotatably mounted in the installation groove, a cover plate arranged on the sliding plate, a top plate arranged on the top surface of the rotating seat, a thimble fixedly mounted at the center of the top plate, three guide grooves in annular array formed in the top plate, a clamping jaw slidably mounted in the guide groove, an electric push rod fixedly mounted on the rotating seat, the other end of the electric push rod being fixedly connected with the clamping jaw, a main shaft fixedly mounted at the two ends of the crankshaft, the main shaft being arranged between the oppositely arranged clamping jaws, and a plurality of connecting rod shaft necks arranged on the crankshaft.

[0009] A counterweight plate is symmetrically fixedly mounted on one end of the mounting plate close to the sliding plate, a counterweight frame is slidably mounted on the counterweight plate, a plurality of counterweight blocks are arranged on the counterweight frame, an adjusting assembly is arranged on the counterweight plate, and an angle fine adjustment assembly is arranged on the rotating seat.

[0010] As a preferred technical scheme of the present application, a recess groove is formed in the counterweight plate, the two ends of the counterweight frame are slidably connected with the recess groove, the cover plate and the sliding plate are connected through bolts, the top plate and the rotating seat are connected through bolts, the adjusting assembly comprises a through hole formed in the counterweight plate and corresponding to the recess groove, a plurality of clamping grooves are symmetrically formed in the counterweight frame, a clamping pin matched with the clamping groove is slidably mounted in the through hole, a rotating ring is rotatably mounted at the bottom of the clamping pin, a spring one is fixedly mounted between the bottom of the rotating ring and the side wall of the through hole, and a fine adjustment mechanism is arranged on the counterweight frame.

[0011] As a preferred technical scheme of the present application, the fine adjustment mechanism comprises a bidirectional screw rod rotatably mounted on the cross rod of the counterweight frame, an adjusting handle is fixedly mounted in the middle of the bidirectional screw rod, a sliding block is symmetrically screwed at the two ends of the bidirectional screw rod, an installation frame is fixedly mounted on the sliding block, an installation rod is arranged on the installation frame, the counterweight block is slidably sleeved on the installation rod, a locking mechanism is arranged on the installation frame, and a storage mechanism is arranged on the counterweight plate.

[0012] As a preferred embodiment of the present invention, the locking mechanism includes a thread formed on the mounting rod, the mounting rod being rotatably connected to the mounting frame, a rotating handle being fixedly installed at one end of the mounting rod extending out of the mounting frame, and a baffle being threadedly connected to the mounting rod, the baffle being slidably connected to the mounting frame.

[0013] As a preferred embodiment of the present invention, the storage mechanism includes storage slots symmetrically formed on the mounting plate and the counterweight plate. A fixing post is fixedly installed at the bottom of the storage slot. A plurality of limiting holes are provided on the fixing post. A limiting ring is slidably fitted on the fixing post. A sliding groove is provided in the limiting ring. A locking plate is slidably installed in the sliding groove. A limiting post is fixedly installed at one end of the locking plate near the fixing post. A quick-locking mechanism is provided on the limiting ring.

[0014] As a preferred embodiment of the present invention, the quick-lock mechanism includes a push plate slidably installed in a slide groove, the top of the push plate extending out of the limiting ring, an inclined block adapted to the locking plate being fixedly installed on the push plate, and a spring being fixedly installed between the locking plate and the slide groove.

[0015] As a preferred embodiment of the present invention, the angle fine-tuning component includes a servo motor fixedly installed at the bottom of the mounting slot, a precision cam rotatably mounted at the output end of the servo motor, a plurality of needle roller bearings adapted to the precision cam rotatably mounted at the bottom of the rotating seat, a synchronization mechanism and a secondary fixing mechanism being provided on the gripper.

[0016] As a preferred embodiment of the present invention, the synchronization mechanism includes a guide disk rotatably mounted between the rotating seat and the top plate, the guide disk having three arc-shaped grooves, and a guide block slidably connected to the arc-shaped grooves being fixedly mounted at the bottom of the gripper.

[0017] As a preferred embodiment of the present invention, the secondary fixing mechanism includes a pressure groove formed at the bottom of the guide groove, a fixing plate fixedly installed on both sides of the bottom of the gripper and slidably connected to the pressure groove, a pressure plate groove formed at the top of the pressure groove, a pressure plate slidably installed in the pressure plate groove, and a screw hole corresponding to the pressure plate formed on the top plate, with a screw threaded into the screw hole.

[0018] As a preferred embodiment of the present invention, the top plate is provided with a guide hole corresponding to the pressure plate, the pressure plate is fixedly installed with a guide column that is slidably connected to the guide hole, and anti-slip grooves are provided on the top surface of the fixed plate and the bottom surface of the pressure plate.

[0019] The present invention has the following beneficial effects:

[0020] 1. By setting the rotating seat, counterweight plate and counterweight block, the crankshaft position can be adjusted in multiple degrees of freedom through the sliding plate sliding along the mounting disc and the rotatability of the rotating seat, so that the multiple connecting rod journals with different positions on the crankshaft can be conveniently moved to the appropriate position for grinding processing, without the need for repeated disassembly and assembly operations on the crankshaft, simplifying the processing flow, saving time and labor cost, balancing the mass on both sides of the shaft by placing different numbers of counterweight blocks in the counterweight frame, avoiding the shaking of the equipment during the rotating crankshaft processing, making the whole equipment more stable, which is beneficial to the safety of the equipment and improves the processing precision;

[0021] 2. By setting the clamping groove, bidirectional screw rod and mounting rod, the crankshaft and the counterweight are preliminarily adjusted and roughly balanced by pulling the clamping pin, rotating half a circle and sliding the counterweight frame, and the force arm acting on the two groups of counterweight blocks is further adjusted by rotating the adjusting handle to drive the bidirectional screw rod to rotate, so that the two sliding blocks and the mounting frame move relatively, and the overall center of gravity of the crankshaft and the counterweight is accurately adjusted to the rotating shaft, reducing the inertia effect and further improving the stability of the equipment during processing;

[0022] 3. By setting the pressing plate, fixed plate and screw rod, the pressing plate is pressed downward by tightening the bolt, moves along the guide hole under the action of the guide column, and then the fixed plate is secondarily extruded and fixed, improving the stability of the clamping jaw, preventing the crankshaft from loosening or shifting due to cutting force and other actions during processing, and ensuring the smooth processing;

[0023] 4. By setting the servo motor to drive the precision cam to rotate, the roller bearing drives the rotating seat to rotate under the action of the precision cam, realizing the adjustment of the angle of the crankshaft, the roller cam structure has the characteristics of stable transmission and high precision, and the rotation angle of the crankshaft can be accurately controlled, so as to meet the requirements of high-precision processing and improve the processing quality. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The structure diagram of the transverse fine adjustment mechanism for crankshaft grinding positioning is provided for the present application;

[0025] Figure 2 The multi-angle structure diagram of the transverse fine adjustment mechanism for crankshaft grinding positioning is provided for the present application;

[0026] Figure 3 The local explosion structure diagram of the transverse fine adjustment mechanism for crankshaft grinding positioning is provided for the present application;

[0027] Figure 4 The structure diagram of the angle fine adjustment assembly of the transverse fine adjustment mechanism for crankshaft grinding positioning is provided for the present application;

[0028] Figure 5The cross-sectional structure schematic view of the top plate of the transverse fine adjustment mechanism for crankshaft grinding positioning provided by the present application;

[0029] Figure 6 The structure schematic view of the adjusting assembly of the transverse fine adjustment mechanism for crankshaft grinding positioning provided by the present application;

[0030] Figure 7 The exploded structure schematic view of the adjusting assembly of the transverse fine adjustment mechanism for crankshaft grinding positioning provided by the present application;

[0031] Figure 8 The cross-sectional structure schematic view of the mounting disc of the transverse fine adjustment mechanism for crankshaft grinding positioning provided by the present application;

[0032] Figure 9 The structure schematic view of the storage mechanism of the transverse fine adjustment mechanism for crankshaft grinding positioning provided by the present application;

[0033] Figure 10 The Figure 5 The enlarged structure schematic view of A in the figure.

[0034] In the figure: 1, mounting disc; 2, sliding plate; 21, driving motor; 22, tooth; 3, mounting groove; 31, rotating seat; 32, cover plate; 33, top plate; 34, top pin; 35, guide groove; 36, clamping jaw; 37, electric push rod; 38, crankshaft; 39, main shaft; 310, connecting rod journal; 4, counterweight plate; 41, counterweight frame; 42, counterweight block; 43, clamping groove; 44, through hole; 45, clamping pin; 46, rotating ring; 47, spring one; 5, bidirectional screw rod; 51, adjusting handle; 52, sliding block; 53, mounting frame; 54, mounting rod; 55, baffle; 6, storage groove; 61, fixed column; 62, limiting hole; 63, limiting ring; 64, sliding groove; 65, push plate; 66, clamping plate; 67, inclined block; 68, spring two; 7, servo motor; 71, precision cam; 72, needle roller bearing; 73, guide disc; 74, guide block; 8, pressing groove; 81, fixed plate; 82, pressing plate; 83, screw hole; 84, screw rod; 85, guide hole; 86, guide column; 87, anti-skid groove. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application.

[0036] Reference Figures 1-10Transverse fine adjustment mechanism for crankshaft grinding positioning, including two mounting discs 1 and crankshafts 38, sliding plate 2 is slidingly installed on mounting disc 1, driving motor 21 is fixedly installed on mounting disc 1, worm is fixedly installed on the output end of driving motor 21, gear teeth 22 adapted to worm are fixedly installed on the bottom of sliding plate 2, mounting groove 3 is formed in sliding plate 2, rotating seat 31 is rotatably installed in mounting groove 3, cover plate 32 is arranged on sliding plate 2, top plate 33 is arranged on the top surface of rotating seat 31, thimble 34 is fixedly installed at the center of top plate 33, three guide grooves 35 arranged in annular array are formed in top plate 33, clamping jaw 36 is slidingly installed in guide groove 35, electric push rod 37 is fixedly installed on rotating seat 31, electric push rod 37 is fixedly connected with clamping jaw 36 at the other end, main shaft 39 is fixedly installed at the two ends of crankshaft 38, main shaft 39 is arranged between oppositely arranged clamping jaws 36, a plurality of connecting rod journal 310 are arranged on crankshaft 38;

[0037] Counterweight plate 4 is symmetrically fixedly installed on one end of mounting disc 1 close to sliding plate 2, counterweight frame 41 is slidingly installed on counterweight plate 4, a plurality of counterweight blocks 42 are arranged on counterweight frame 41, adjusting assembly is arranged on counterweight plate 4, angle fine adjustment assembly is arranged on rotating seat 31;

[0038] The sliding of sliding plate 2 along mounting disc 1 and the rotatability of rotating seat 31 can adjust the connecting rod journal 310 at different positions on crankshaft 38 to move to the appropriate position, without the need for repeated disassembly and assembly of crankshaft 38, greatly simplifying the processing flow, when the connecting rod journal 310 moves to the shaft center position, causing the mass distribution of crankshaft 38 to be uneven, the mass balance on both sides of the shaft center can be achieved by placing different number of counterweight blocks 42 in counterweight frame 41. Avoid the shaking of the equipment during the processing of rotating crankshaft 38 due to uneven mass, making the equipment more stable as a whole.

[0039] Reference Figure 1 , Figure 2 , Figures 6 to 8The counterweight plate 4 is provided with a displacement slot, the counterweight frame 41 is slidably connected to the displacement slot at both ends, the cover plate 32 is connected to the sliding plate 2 through bolts, the top plate 33 is connected to the rotating seat 31 through bolts, the adjusting assembly comprises a through hole 44 provided on the counterweight plate 4 and corresponding to the displacement slot, a plurality of clamping slots 43 are symmetrically provided on the counterweight frame 41, a clamping pin 45 is slidably installed in the through hole 44 and matched with the clamping slots 43, a rotating ring 46 is rotatably installed at the bottom of the clamping pin 45, a spring 47 is fixedly installed between the bottom of the rotating ring 46 and the sidewall of the through hole 44, and a fine adjustment mechanism is arranged on the counterweight frame 41; the fine adjustment mechanism comprises a bidirectional screw rod 5 rotatably installed on the cross rod of the counterweight frame 41, a regulating handle 51 fixedly installed in the middle of the bidirectional screw rod 5, sliding blocks 52 symmetrically screwed at both ends of the bidirectional screw rod 5, an installation frame 53 fixedly installed on the sliding blocks 52, an installation rod 54 arranged on the installation frame 53, and the counterweight blocks 42 slidably sleeved on the installation rod 54; a locking mechanism is arranged on the installation frame 53, and a storage mechanism is arranged on the counterweight plate 4; during the balancing process, coarse balancing is first performed, the clamping pin 45 is pulled, rotated by half a circle, and the counterweight frame 41 is slid to preliminarily adjust, the clamping pin 45 is reversely operated to realize coarse positioning, the regulating handle 51 is further rotated to drive the bidirectional screw rod 5 to rotate, and the two sliding blocks 52 and the installation frame 53 relatively move to finely adjust the force arm acting on the two groups of counterweight blocks 42; the coarse and fine combination balancing mode can adjust the overall gravity center of the crankshaft 38 and the counterweight to the rotating shaft, and reduce the inertia effect.

[0040] With reference to Figures 6 to 9 The locking mechanism comprises threads provided on the installation rod 54, the installation rod 54 is rotatably connected to the installation frame 53, a rotating handle is fixedly installed at one end of the installation rod 54 extending out of the installation frame 53, a baffle 55 is threadedly connected to the installation rod 54, and the baffle 55 is slidably connected to the installation frame 53; the storage mechanism comprises receiving grooves 6 symmetrically provided on the installation disc 1 and the counterweight plate 4, a fixed column 61 is fixedly installed at the bottom of the receiving groove 6, a plurality of limiting holes 62 are provided on the fixed column 61, a limiting ring 63 is slidably sleeved on the fixed column 61, a sliding groove 64 is provided in the limiting ring 63, a clamping plate 66 is slidably installed in the sliding groove 64, a limiting column is fixedly installed at one end of the clamping plate 66 close to the fixed column 61, and a quick locking mechanism is arranged on the limiting ring 63; the quick locking mechanism comprises a push plate 65 slidably installed in the sliding groove 64, the push plate 65 is arranged with the top extending out of the limiting ring 63, an inclined block 67 matched with the clamping plate 66 is fixedly installed on the push plate 65, and a spring 68 is fixedly installed between the clamping plate 66 and the sliding groove 64; the counterweight blocks 42 can be sleeved on the fixed column 61 when stored, a certain number of counterweight blocks 42 can be taken as needed when used, the clamping plate 66 is extruded by the inclined block 67 driven by the push plate 65 to make the limiting column slide out of the limiting hole 62, and the counterweight blocks 42 can be taken after the limiting ring 63 is removed, so that the taking process of the counterweight blocks 42 is simple and fast, the fixed column 61 is provided with limiting holes 62 corresponding to different numbers of counterweight blocks 42, and the remaining counterweight blocks 42 can be limited and fixed, thereby preventing movement during equipment rotation.

[0041] Referring to Figure 4 , the angle fine adjustment assembly comprises a servo motor 7 fixedly installed at the bottom of the installation groove 3, the output end of the servo motor 7 is rotatably installed with a precision cam 71, the bottom of the rotating seat 31 is rotatably installed with a plurality of needle bearings 72 matched with the precision cam 71, the clamping jaw 36 is provided with a synchronous mechanism, and the clamping jaw 36 is provided with a secondary fixing mechanism; the synchronous mechanism comprises a guide disc 73 rotatably installed between the rotating seat 31 and the top plate 33, the guide disc 73 is provided with three arc-shaped grooves, and the bottom of the clamping jaw 36 is fixedly installed with a guide block 74 in sliding connection with the arc-shaped grooves; the servo motor 7 drives the precision cam 71 to rotate, and then the needle bearings 72 drive the rotating seat 31 to rotate under the action of the precision cam 71, so that the angle of the crankshaft 38 is adjusted, the guide block 74 drives the guide disc 73 to rotate when the clamping jaw 36 moves, and then all the clamping jaws 36 are driven to move synchronously, so that concentric clamping is realized, the roller cam structure has the characteristics of stable transmission and high precision, and the rotating angle of the crankshaft 38 can be accurately controlled, so that the requirements of high-precision machining are met, and the machining quality is improved.

[0042] Referring to Figure 5 and Figure 10 , the secondary fixing mechanism comprises a pressing groove 8 formed in the bottom of the guide groove 35, and the bottom of the clamping jaw 36 is fixedly installed with a fixed plate 81 in sliding connection with the pressing groove 8, the top of the pressing groove 8 is provided with a pressing plate groove, the pressing plate groove is slidably installed with a pressing plate 82, the top plate 33 is provided with a screw hole 83 corresponding to the pressing plate 82, and the screw hole 83 is threadedly connected with a screw rod 84; the top plate 33 is provided with a guide hole 85 corresponding to the pressing plate 82, the pressing plate 82 is fixedly installed with a guide column 86 in sliding connection with the guide hole 85, and the top surface of the fixed plate 81 and the bottom surface of the pressing plate 82 are both provided with anti-skid grooves 87; after clamping, the pressing plate 82 is pressed downward by tightening the bolt, moves along the guide hole 85 under the action of the guide column 86, and then the fixed plate 81 is secondarily extruded and fixed, so that the stability of the clamping jaw 36 is improved, the crankshaft 38 is prevented from loosening or displacement due to cutting force and the like during machining, and the machining process is ensured to proceed smoothly.

[0043] The specific working principle of the present application is as follows:

[0044] In use, first, the main shaft 39 is aligned with the top pin 34 on the top plate 33, the main shaft 39 of the crankshaft 38 is clamped by driving the clamping jaw 36 through the electric push rod 37, and the sliding plate 2 is initially located at a position such that the rotating seat 31 is at the rotating axis, at this time, the grinding equipment is started, and the main shaft 39 of the crankshaft 38 can be ground, when the main shaft 39 is processed, the sliding plate 2 is driven to slide along the mounting disc 1 by the driving motor 21, the axis position of the connecting rod journal 310 when rotating is adjusted, at this time, since the axis of the connecting rod journal 310 and the axis of the main shaft 39 are not necessarily aligned with the diameter of the mounting disc 1, the rotating seat 31 and the top plate 33 can be rotated relative to the sliding plate 2 by rotating the rotating seat 31, the axis of the connecting rod journal 310 and the axis of the main shaft 39 are adjusted to be aligned with the diameter of the mounting disc 1, and then the position of the sliding plate 2 is adjusted, so that the axis of the connecting rod journal 310 is aligned with the axis when rotating, facilitating grinding of the connecting rod journal 310, the position of the crankshaft 38 is adjusted in multiple degrees of freedom by the rotatability of the rotating seat 31, facilitating movement of the connecting rod journal 310 to be ground to a suitable position, meeting the processing needs of the multiple connecting rod journals 310 with different positions on the crankshaft 38, without the need for repeated disassembly and assembly operations, facilitating use, when the connecting rod journal 310 moves to the selected axis, the mass distribution of the crankshaft 38 at this time is no longer uniform compared with the mounting disc 1, at this time, the mass on both sides of the axis can be counterbalanced by placing different numbers of counterweight blocks 42 in the counterweight frame 41, and then the entire device is more stable when rotating the crankshaft 38 for processing, enhancing the stability of processing, being conducive to protecting the safety of the device in use and improving the processing precision;

[0045] When the mass of the crankshaft 38 is counterbalanced, the counterweight blocks 42 are symmetrically placed on the mounting rods 54 in the two mounting frames 53, first, the pin 45 can be pulled and rotated by half a circle, so that the pin 45 is perpendicular to the slot 43 and cannot be embedded in the slot 43, at this time, the spring one 47 is stretched, and the torsion of the spring one 47 is released by rotating the rotating ring 46, at this time, the counterweight frame 41 is slid out to a certain position along the gap slot on the counterweight plate 4 for preliminary counterbalancing, after completion, the pin 45 is reversely rotated by half a circle, and the pin 45 is pulled back under the action of the spring one 47 and is clamped into the position of the corresponding slot 43, realizing rough counterbalancing of the weight of the crankshaft 38, further, the bidirectional screw rod 5 can be rotated by rotating the adjusting handle 51, the two sliding blocks 52 and the mounting frame 53 are driven to move relative to each other through opposite threads at both ends, the force arm of the two groups of counterweight blocks 42 is finely adjusted, thereby realizing fine adjustment of the counterbalancing effect, so that the overall center of gravity of the crankshaft 38 and the counterweight is located on the rotating shaft when rotating, avoiding shaking under the influence of inertia, and improving the stability of the device during processing;

[0046] The counterweight 42 can be sleeved on the fixing column 61 when being stored, and a certain number of counterweights 42 are taken as needed during use. The inclined block 67 is driven to extrude the clamping plate 66 by pinching the push plate 65, so that the limiting column slides out of the limiting hole 62. After the limiting ring 63 is removed, the counterweight 42 can be taken. The fixing column 61 is provided with limiting holes 62 corresponding to different numbers of counterweights 42, so as to conveniently limit and fix the remaining counterweights 42, prevent them from moving during rotation, and facilitate the use and storage of the counterweights 42.

[0047] The precision cam 71 is driven to rotate by the servo motor 7, so that the needle bearing 72 drives the rotating seat 31 to rotate under the action of the precision cam 71, the angle of the crankshaft 38 is adjusted, the precision of angle control is improved by the roller cam structure, the machining precision is improved, the guide disc 73 is driven to rotate by the guide block 74 when the clamping jaw 36 moves, so that all the clamping jaws 36 move synchronously, and the concentric clamping is realized.

[0048] After clamping, the screw rod 84 can be tightened to press the pressing plate 82 downward, so that the pressing plate 82 moves along the guide hole 85 under the action of the guide column 86, and the fixed plate 81 is secondarily extruded and fixed, the stability of the clamping jaw 36 is improved, and the anti-skid groove 87 can further improve the fixing effect of the pressing plate 82 on the fixed plate 81.

[0049] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A transverse fine-tuning mechanism for crankshaft grinding positioning, comprising two mounting plates and a crankshaft, wherein a sliding plate is slidably mounted on the mounting plates, a drive motor is fixedly mounted on the mounting plates, a worm gear is fixedly mounted on the output end of the drive motor, and teeth adapted to the worm gear are fixedly mounted on the bottom of the sliding plate, characterized in that, The sliding plate has an installation groove, in which a rotating seat is rotatably installed. The sliding plate is provided with a cover plate, and a top plate is provided on the top surface of the rotating seat. A pin is fixedly installed in the center of the top plate. The top plate has three guide grooves arranged in a circular array, in which a gripper is slidably installed. An electric push rod is fixedly installed on the rotating seat, and the other end of the electric push rod is fixedly connected to one of the grippers. A main shaft is fixedly installed at both ends of the crankshaft, and the main shaft is arranged between the grippers arranged opposite to each other. A plurality of connecting rod journals are provided on the crankshaft. A counterweight plate is symmetrically fixedly installed on one end of the mounting plate near the sliding plate. A counterweight frame is slidably installed on the counterweight plate. Several counterweight blocks are provided on the counterweight frame. An adjustment component is provided on the counterweight plate. An angle fine-tuning component is provided on the rotating seat. The counterweight plate has a clearance groove, and both ends of the counterweight frame are slidably connected to the clearance groove. The top plate and the rotating seat are connected by bolts, and the cover plate and the sliding plate are connected by bolts. The adjustment assembly includes a through hole on the counterweight plate corresponding to the clearance groove. Several slots are symmetrically provided on the counterweight frame. A locking pin adapted to the slot is slidably installed in the through hole. A rotating ring is rotatably installed at the bottom of the locking pin. A spring is fixedly installed between the bottom of the rotating ring and the side wall of the through hole. A fine-tuning mechanism is provided on the counterweight frame. The fine-tuning mechanism includes a bidirectional lead screw rotatably mounted on the crossbar of the counterweight frame, an adjustment handle fixedly mounted in the middle of the bidirectional lead screw, sliders symmetrically screwed to both ends of the bidirectional lead screw, an mounting frame fixedly mounted on the slider, a mounting rod provided on the mounting frame, the counterweight block slidingly mounted on the mounting rod, a locking mechanism provided on the mounting frame, and a storage mechanism provided on the counterweight plate. The storage mechanism includes symmetrically arranged storage slots on the mounting plate and the counterweight plate. A fixing post is fixedly installed at the bottom of the storage slot. Several limiting holes are opened on the fixing post. A limiting ring is slidably fitted on the fixing post. A sliding groove is opened in the limiting ring. A locking plate is slidably installed in the sliding groove. A limiting post is fixedly installed at the end of the locking plate near the fixing post. A quick-locking mechanism is provided on the limiting ring.

2. The transverse fine-tuning mechanism for crankshaft grinding positioning according to claim 1, characterized in that, The locking mechanism includes threads formed on the mounting rod, the mounting rod is rotatably connected to the mounting frame, a handle is fixedly installed at one end of the mounting rod extending out of the mounting frame, and a baffle is threadedly connected to the mounting rod, the baffle being slidably connected to the mounting frame.

3. The transverse fine-tuning mechanism for crankshaft grinding positioning according to claim 1, characterized in that, The quick-lock mechanism includes a push plate slidably installed in a slide groove, with the top of the push plate extending out of the limiting ring. An inclined block adapted to the locking plate is fixedly installed on the push plate, and a spring is fixedly installed between the locking plate and the slide groove.

4. The transverse fine-tuning mechanism for crankshaft grinding positioning according to claim 1, characterized in that, The angle fine-tuning component includes a servo motor fixedly installed at the bottom of the mounting slot, a precision cam rotatably mounted at the output end of the servo motor, a plurality of needle roller bearings adapted to the precision cam rotatably mounted at the bottom of the rotating seat, a synchronization mechanism and a secondary fixing mechanism provided on the gripper.

5. The transverse fine-tuning mechanism for crankshaft grinding positioning according to claim 4, characterized in that, The synchronization mechanism includes a guide plate rotatably mounted between the rotating seat and the top plate. The guide plate has three arc-shaped grooves, and a guide block that is slidably connected to the arc-shaped grooves is fixedly mounted at the bottom of the gripper.

6. The transverse fine-tuning mechanism for crankshaft grinding positioning according to claim 4, characterized in that, The secondary fixing mechanism includes a pressure groove formed at the bottom of the guide groove, and fixed plates that are slidably connected to the pressure groove are fixedly installed on both sides of the bottom of the gripper. A pressure plate groove is formed at the top of the pressure groove, and a pressure plate is slidably installed in the pressure plate groove. A screw hole corresponding to the pressure plate is formed on the top plate, and a screw is threaded into the screw hole.

7. The transverse fine-tuning mechanism for crankshaft grinding positioning according to claim 6, characterized in that, The top plate has guide holes corresponding to the pressure plate, and the pressure plate has guide columns that are slidably connected to the guide holes. Anti-slip grooves are provided on the top surface of the fixed plate and the bottom surface of the pressure plate.

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