CN212071118U - Universal fixture for turning three cranks of crankshaft - Google Patents
Universal fixture for turning three cranks of crankshaft Download PDFInfo
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- CN212071118U CN212071118U CN202020863466.5U CN202020863466U CN212071118U CN 212071118 U CN212071118 U CN 212071118U CN 202020863466 U CN202020863466 U CN 202020863466U CN 212071118 U CN212071118 U CN 212071118U
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- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 230000000903 blocking Effects 0.000 claims description 14
- 210000001847 Jaw Anatomy 0.000 claims description 6
- 210000000078 Claw Anatomy 0.000 claims description 3
- 230000000149 penetrating Effects 0.000 abstract description 3
- 238000003825 pressing Methods 0.000 description 14
- 230000000694 effects Effects 0.000 description 6
- 238000003754 machining Methods 0.000 description 6
- 230000000875 corresponding Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 239000011295 pitch Substances 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000009960 carding Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Abstract
The utility model discloses a universal fixture for turning three cranks of a crankshaft, which comprises a baffle disc, a turntable, a transition disc, a crankshaft clamping mechanism and a tail top plate assembly, wherein the baffle disc is fixedly connected with a main shaft of a horizontal lathe through a bolt hole in a penetrating manner by a bolt structure; a lead screw transmission assembly used for enabling the rotary table to move up and down along the baffle disc is arranged between the baffle disc and the rotary table, the rotary table is arranged on the lead screw transmission assembly, and the rotary table further comprises a locking mechanism used for locking and positioning the moved rotary table and a graduated scale assembly used for measuring the up-and-down movement amount of the rotary table; the transition disc is also provided with an indexing adjusting mechanism which is used for positioning and locking the transition disc after the transition disc rotates for 120 degrees; the crankshaft clamping mechanism is fixedly arranged at the center of the transition disc and used for clamping and fixing one end of a crankshaft to be machined, and the tail top plate assembly is used for limiting and supporting the other end of the crankshaft. The utility model discloses well eccentricity is adjustable accurate with the location, can satisfy the bent axle three throw processing of different eccentricities simultaneously.
Description
Technical Field
The utility model relates to an anchor clamps technical field, concretely relates to universal fixturing that car bent axle three turned.
Background
On C630 engine lathe equipment, when processing connecting rod diameter of axle to different eccentricity crankshafts, need special fixture, could accomplish the lathe work of crankshaft diameter of axle to increased the carding of crankshaft processing special fixture, and special fixture's structure is complicated, and the manufacturing cycle is long, and is with high costs, is unfavorable for the reduce cost of enterprise, and it is very necessary for this design a general type eccentricity adjustable crankshaft lathe work anchor clamps.
SUMMERY OF THE UTILITY MODEL
To the not enough of above-mentioned prior art, the utility model aims to solve the technical problem that: the utility model provides a car bent axle three throw universal fixturing, the eccentricity is adjustable and the location is accurate, can satisfy the bent axle three throw processing of different eccentricities simultaneously.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a universal fixture for turning three cranks of a crankshaft comprises a baffle disc, a rotary disc, a transition disc, a crankshaft clamping mechanism and a tail top plate assembly, wherein the baffle disc is provided with a plurality of bolt holes and fixedly connected with a main shaft of a horizontal lathe through a bolt hole penetrating bolt structure; a lead screw transmission assembly used for enabling the rotary table to move up and down along the blocking disc is arranged between the blocking disc and the rotary table so as to adapt to processing of crankshafts with different eccentric distances, the rotary table is arranged on the lead screw transmission assembly, and the rotary table further comprises a locking mechanism used for locking and positioning the moved rotary table and a graduated scale assembly used for measuring the up-and-down movement amount of the rotary table; the transition disc is concentric with the axis of the rotary disc, an annular groove is further formed in the rotary disc, the section of the annular groove is inverted T-shaped, a plurality of T-shaped bolts are arranged on the annular groove, screw holes for the T-shaped bolts to penetrate through are formed in the transition disc and are fixed through nuts, and the transition disc is controlled to rotate along the rotary disc through the tightness degree of the nuts so as to adjust the indexing; the transition disc is also provided with an indexing adjusting mechanism which is used for positioning and locking the transition disc after the transition disc rotates for 120 degrees; the crankshaft clamping mechanism is fixedly arranged at the center of the transition disc and used for clamping and fixing one end of a crankshaft to be machined, and the tail top plate assembly is used for limiting and supporting the other end of the crankshaft.
In the utility model, after the baffle disc is connected and fixed with the main shaft of the horizontal lathe, when the three-turn crankshaft is specifically processed, the turntable moves up and down by adjusting the lead screw transmission assembly, an eccentric distance is formed between the turntable and the rotation center of the lathe, the required eccentric distance is consistent with the numerical value on the graduated scale assembly and the required eccentric value, and after the adjustment is completed, the moved turntable is locked and positioned by the locking mechanism, so that the turntable is fixed with the baffle disc and can be processed; then add man-hour to the bent axle, need switch and add man-hour to the bent axle another side, at first with the transition dish on the nut back of unscrewing of T type bolt upper end, the carousel can be followed in order to adjust the graduation like this, and rotatory transition dish is adjusted to corresponding graduation, the utility model discloses in for three throw bent axle processing, for 120 turning, then adopt graduation adjustment mechanism to fix a position and lock, guarantee that its graduation is 120 +/-10', then screw the nut of T type bolt upper end again, guarantee that the transition dish is fixed with the carousel. Through the indexing adjusting mechanism, the indexing is accurate and uniform, and the operation is simple and reliable, so that each part of the three cranks of the crankshaft is machined; through bent axle fixture and the cooperation of tail roof subassembly, can realize the tight and location of clamp to bent axle both ends, its clamping range 30 ~ 120mm guarantees the stability of bent axle in the course of working.
In this scheme, through reciprocating of lead screw drive assembly drive carousel to realize arbitrary eccentricity in the certain limit, satisfy the bent axle processing of different eccentricities. In addition, the locking mechanism can fix the turntable which moves up and down at any eccentric distance, the stability is good, and the accuracy of the eccentric distance is not influenced by the deviation of the turntable caused by the shake in the machining process. Utilize the scale subassembly simultaneously, can accurately obtain the reading of eccentricity, also can be through the reading of visualing in bent axle course of working simultaneously, the error of correction and control eccentricity. Through the cooperation of the lead screw transmission assembly, the locking mechanism and the graduated scale assembly, the crankshafts with different eccentricities can be precisely positioned and machined, and the crankshafts are precisely machined, so that the machining precision of the crankshafts is improved. Through set up T type bolt on the carousel, the nut of T type bolt upper end is unscrewed the back, and the transition dish alright rotates in order to adjust the graduation along the carousel to realize the processing of every face of bent axle three turns.
Preferably, the lead screw transmission assembly comprises a lead screw and a nut, a guide seat for the lead screw to pass through is installed at the top of the baffle disc, a through hole is formed in the guide seat, a bearing is arranged at the through hole, and the lead screw vertically passes through the through hole and is rotatably connected with the guide seat through the bearing; the nut is positioned on the screw rod below the guide seat and forms a screw rod nut pair mechanism with the screw rod; the nut is characterized in that a screw rod is transversely arranged on one side of the nut, a screw hole for the nut screw rod to pass through is correspondingly formed in the center of the rotary table, the screw rod end of the nut passes through the screw hole of the rotary table and then fixes the rotary table on the nut through a locking nut, and the rotary table can move up and down through the rotation of the screw rod.
Like this, adopt the instrument to make the lead screw rotate, drive the carousel for keeping off the dish up-and-down motion to match and adjust the corresponding eccentricity of bent axle, make numerical value on the scale subassembly unanimous with the eccentric centre that needs alright, the stability that makes the carousel oscilaltion through screw-nut pair mechanism is good, the precision is higher.
Preferably, the locking mechanism comprises baffle plates arranged on the baffle disc and positioned at two sides of the rotary disc, the baffle plates are fixed on the baffle disc, a plurality of mounting grooves are formed in the baffle plates along the width direction, a stop block is arranged in each mounting groove, and the length of each stop block is greater than the groove width of each mounting groove so that a part of each stop block extends out of one side of the mounting groove; two sides of the back surface of the turntable facing the blocking disc are provided with connecting plates with L-shaped cross sections, the two connecting plates are positioned between the two baffles, and the bottoms of the connecting plates are contacted with the blocking disc; the part of the stop block extending out of the mounting groove faces the direction of the connecting plate, and the part of the stop block extending out of one side of the mounting groove is pressed on the upper surface of the horizontal part of the connecting plate, so that the stop disc and the rotary disc are limited and fixed; the mounting groove concave surface and the stop block are both provided with screw holes, bolts penetrate through the screw holes, penetrate through the stop plate and the stop block in sequence and protrude out of the upper surface of the stop block, and the end, protruding out of the upper surface of the stop block, of each bolt is matched with a nut and is tightly pressed on the connecting plate through the nut, so that the rotary table and the stop plate are locked and fixed.
Like this, after screw drive assembly eccentric adjustment accomplishes, the lead screw can rotate because of external force influence, thereby make the nut drive the carousel skew from top to bottom, influence its eccentric precision, consequently, through the dog on the baffle, the dog stretches out the upper surface that the part outside the mounting groove can be pressed at the connecting plate horizontal part, when needs eccentric adjustment, the nut on the dog is unscrewed, dog relative slip can be followed to the connecting plate on the carousel like this, after eccentric adjustment accomplishes, through the nut on screwing up the dog, make the dog stretch out the part outside the mounting groove sticiss on the connecting plate of carousel, accomplish the fixed of carousel.
Preferably, the crankshaft clamping mechanism is a self-centering three-jaw chuck, and comprises a chuck body and three jaws; the chuck body and the transition disc are provided with screw holes, hexagonal cylindrical screws penetrate through the screw holes, the hexagonal cylindrical screws penetrate through the transition disc and are screwed into the screw holes of the chuck body to fix the chuck body on the transition disc, and the chuck body is arranged at the rotating center of the transition disc; the jack catch is soft claw, and it has the keyway to open on one of them jack catch and the bent axle contact's the terminal surface, installs the key on the keyway, a part of key protrusion in the keyway is used for with treating that the bent axle link of processing goes up draw-in groove looks block.
Therefore, the adopted crankshaft clamping mechanism is a self-centering three-jaw chuck on the market, the clamping range can be 30mm to 120mm, and the clamping range is determined according to the shaft diameter of the crankshaft. After the chuck is installed, the bevel gear on the chuck is rotated by a wrench, the bevel gear drives the planar rectangular threads and then drives the three-jaw to move in a centripetal mode, and because the thread pitches of the planar rectangular threads are equal, the three-jaw movement distances are equal, and the automatic centering function is achieved. Simultaneously improve one of them jack catch in this scheme, open and have the keyway, install the key in the keyway to through the draw-in groove looks block that self has on key and the bent axle, improve bent axle fixture to the centre gripping effect of bent axle, the centre gripping stability is higher.
Preferably, the indexing adjustment mechanism comprises a screw-tail taper pin, three indexing holes which are distributed in the same radius with the center of the transition disc as the center of a circle are uniformly distributed on the transition disc and the rotary disc in the circumferential direction, the transition disc is indexed by 120 degrees with the center of a circle of the transition disc as the center, the indexing holes on the transition disc are through holes, the indexing holes on the rotary disc are blind holes, the screw-tail taper pin is inserted into the indexing holes which are overlapped with the transition disc and the rotary disc, and the threaded end of the screw-tail taper pin is positioned on the transition disc and matched with a nut.
Therefore, when the indexing needs to be adjusted, firstly, the nut on the T-shaped bolt on the transition disc is unscrewed, then the screw tail taper pin inserted in the indexing hole of the transition disc is taken down, so that the transition disc can rotate relatively along the rotary disc, and as the indexing hole is divided by 120 degrees, after the next indexing hole on the transition disc is superposed with the indexing hole on the rotary disc, the screw tail taper pin is inserted again, the nut is screwed at the top of the screw tail taper pin to be positioned, then the nut on the T-shaped bolt is screwed and fixed, and then the indexing adjustment of the transition disc is completed, so that different surfaces of the three-throw crankshaft are processed.
As optimization, the scale subassembly includes the main scale and attaches the vice chi that can slide on the main scale, and the main scale is vertical to be fixed on the fender dish and to be located the vertical one side of carousel, and the vice chi is fixed on the connecting plate on the carousel and with the main scale syntropy, vice chi and main scale sliding fit and vice chi paste in the scale mark surface of main scale to the up-and-down motion through the carousel drives the length direction motion of vice chi along the main scale.
Thus, the scale assembly is in the form of a main scale and an auxiliary scale, the scale is read in the same way as a vernier caliper, and the precision of the scale is +/-0.02 mm. The vertical movement of the turntable is obtained by reading the readings of the main scale and the auxiliary scale, so that the number of the eccentric distance of the main shaft is reflected, the accurate measurement of the eccentric distance of the crankshaft is displayed, and the processing precision is ensured.
To sum up, the beneficial effects of the utility model reside in that: the utility model discloses in, drive reciprocating of carousel through lead screw drive assembly to realize arbitrary eccentricity in the certain limit, satisfy the bent axle processing of different eccentricities. In addition, the locking mechanism can fix the turntable which moves up and down at any eccentric distance, the stability is good, and the accuracy of the eccentric distance is not influenced by the deviation of the turntable caused by the shake in the machining process. Utilize the scale subassembly simultaneously, can accurately obtain the reading of eccentricity, also can be through the reading of visualing in bent axle course of working simultaneously, the error of correction and control eccentricity. Through the cooperation of the lead screw transmission assembly, the locking mechanism and the graduated scale assembly, the crankshafts with different eccentricities can be precisely positioned and machined, and the crankshafts are precisely machined, so that the machining precision of the crankshafts is improved. Through set up T type bolt on the carousel, the nut of T type bolt upper end is unscrewed the back, and the transition dish alright rotates in order to adjust the graduation along the carousel to realize the processing of every face of bent axle three turns.
Drawings
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a right side view of FIG. 1;
FIG. 3 is a schematic structural view of the scale assembly of FIG. 1;
FIG. 4 is a schematic structural view of the tailgating assembly of FIG. 1;
fig. 5 is a schematic structural view of the blocking disk in fig. 1.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Reference numerals in the drawings of the specification include: the device comprises a catch disc 1, a guide seat 2, a screw rod 3, a nut 4, a rotary disc 5, a transition disc 6, a tail top plate assembly 7, a hexagonal cylindrical screw 8, a T-shaped bolt 9, a screw tail taper pin 10, a chuck body 11, a clamping jaw 12, a key 13, a baffle plate 14, a stop block 15, a main ruler 16, an auxiliary ruler 17, a connecting plate 18, a crankshaft 19 to be processed, an opening sleeve 20, a thimble sleeve 21, a screw rod 22, a pressing sleeve 23, a screw 24, a thread sleeve 25 and a pressure spring 26.
In the present embodiment, as shown in fig. 1 to 5, the universal fixture for turning three cranks of a crankshaft comprises a baffle disc 1, a rotary table 5, a transition disc 6, a crankshaft clamping mechanism and a tail top plate assembly 7, wherein the baffle disc 1 is provided with a plurality of bolt holes, and the baffle disc 1 is fixedly connected with a spindle of a horizontal lathe through a bolt hole penetrating bolt structure; a screw rod transmission assembly used for enabling the rotary table 5 to move up and down along the blocking disc 1 is arranged between the blocking disc 1 and the rotary table 5 so as to adapt to crankshaft machining with different eccentric distances, the rotary table 5 is installed on the screw rod transmission assembly, and the rotary table further comprises a locking mechanism used for locking and positioning the moved rotary table 5 and a graduated scale assembly used for measuring the up-and-down movement amount of the rotary table 5; the transition disc 6 is concentric with the axis of the rotary disc 5, the rotary disc 5 is also provided with an annular groove, the section of the annular groove is inverted T-shaped, the annular groove is provided with a plurality of T-shaped bolts 9, the transition disc 6 is provided with screw holes for the T-shaped bolts 9 to pass through and is fixed by a nut, so that the transition disc 6 is controlled to rotate along the rotary disc 5 by the tightness degree of the nut to adjust the indexing; the transition disc 6 is also provided with an indexing adjusting mechanism which is used for positioning and locking the transition disc after the transition disc rotates for 120 degrees; the crankshaft clamping mechanism is fixedly arranged at the center of the transition disc 6 and used for clamping and fixing one end of a crankshaft to be machined, and the tail top plate assembly 7 is used for limiting and supporting the other end of the crankshaft.
In the utility model, after the baffle disc 1 is connected and fixed with the main shaft of the horizontal lathe, when a three-turn crankshaft is specifically processed, the turntable 5 is moved up and down by adjusting the lead screw transmission assembly to form an eccentric distance with the rotation center of the lathe, the required eccentric distance is consistent with the numerical value on the graduated scale assembly and the required eccentric value, after the adjustment is completed, the movable turntable 5 is locked and positioned by the locking mechanism, so that the turntable 5 is fixed with the baffle disc 1 and can be processed; then add man-hour to the bent axle, need switch and add man-hour to the bent axle another side, at first with transition 6 on the nut back of unscrewing of T type bolt 9 upper end, transition dish 6 can be followed 5 rotations in order to adjust the graduation like this, rotatory transition dish 6 adjusts to corresponding graduation, the utility model discloses in for three bent axle processing, for 120 turning, then adopt graduation adjustment mechanism to fix a position and lock, guarantee that its graduation is 120 +/-10', then screw the nut of T type bolt 9 upper end again, guarantee that transition dish 6 is fixed with carousel 5. Through the indexing adjusting mechanism, the indexing is accurate and uniform, and the operation is simple and reliable, so that each part of the three cranks of the crankshaft is machined; through bent axle fixture and 7 subassemblies of tail roof subassembly mutually supporting, can realize the tight and location of clamp to bent axle both ends, its clamping range 30 ~ 120mm guarantees the stability of bent axle in the course of working.
In this scheme, through reciprocating of lead screw drive assembly drive carousel 5 to realize arbitrary eccentricity in the certain limit, satisfy the bent axle processing of different eccentricities. In addition, the locking mechanism can fix the turntable 5 which moves up and down at any eccentric distance, the stability is good, and the accuracy of the eccentric distance is not influenced by the deviation of the turntable 5 caused by the shake in the processing process. Utilize the scale subassembly simultaneously, can accurately obtain the reading of eccentricity, also can be through the reading of visualing in bent axle course of working simultaneously, the error of correction and control eccentricity. Through the cooperation of the lead screw transmission assembly, the locking mechanism and the graduated scale assembly, the crankshafts with different eccentricities can be precisely positioned and machined, and the crankshafts are precisely machined, so that the machining precision of the crankshafts is improved. Through set up T type bolt 9 on carousel 5, the nut of T type bolt 9 upper end is unscrewed the back, and transition dish 6 alright rotate in order to adjust the graduation along carousel 5 to realize the processing of every face of bent axle three turns.
In a specific embodiment, the lead screw transmission assembly comprises a lead screw 3 and a nut 4, a guide seat 2 for the lead screw 3 to pass through is installed at the top of the baffle disc 1, a through hole is formed in the guide seat 2, a bearing is arranged at the through hole, and the lead screw 3 vertically passes through the through hole and is rotatably connected with the guide seat 2 through the bearing; the nut 4 is positioned on the screw rod 3 below the guide seat 2 and forms a screw rod nut pair mechanism with the screw rod 3; the nut is characterized in that a screw rod is transversely arranged on one side of the nut, a screw hole for the screw rod of the nut to pass through is correspondingly formed in the center of the rotary table 5, the screw rod end of the nut passes through the screw hole of the rotary table 5 and then fixes the rotary table 5 on the nut through a locking nut, and therefore the screw rod rotates to achieve up-and-down movement of the rotary table 5.
Like this, adopt the instrument to make lead screw 3 rotate, drive carousel 5 for keeping off 1 up-and-down motion of dish to match and adjust the corresponding eccentricity of bent axle, make numerical value on the scale subassembly unanimous with the eccentric value that needs alright, make the stability of carousel 5 oscilaltion good through screw-nut pair mechanism, the precision is higher.
In a specific embodiment, the locking mechanism comprises baffle plates 14 arranged on the baffle disc 1 and positioned at two sides of the rotating disc 5, the baffle plates 14 are fixed on the baffle disc 1, a plurality of mounting grooves are formed in the baffle plates 14 along the width direction, a stop block is arranged in each mounting groove, and the length of each stop block is greater than the groove width of each mounting groove so that a part of each stop block extends out of one side of the mounting groove; two sides of the back surface of the turntable facing the blocking disc are provided with connecting plates 18 with L-shaped cross sections, the two connecting plates 18 are positioned between the two baffles, and the bottoms of the connecting plates are contacted with the blocking disc; the part of the stop block extending out of the mounting groove faces the direction of the connecting plate, and the part of the stop block extending out of one side of the mounting groove is pressed on the upper surface of the horizontal part of the connecting plate, so that the stop disc and the rotary disc are limited and fixed; all seted up the screw on mounting groove concave surface and the dog, wear to be equipped with the bolt on the screw, the bolt passes baffle and dog in proper order and protrusion in the dog upper surface, and the one end cooperation of bolt protrusion in dog upper surface has the nut and compresses tightly on the connecting plate through this nut to it is fixed with the locking of baffle 14 to make carousel 5.
Like this, after screw drive assembly eccentric adjustment is accomplished, lead screw 3 may rotate because of the influence of external force, thereby make the nut drive carousel 5 skew from top to bottom, influence its eccentric precision, consequently, through dog 15 on baffle 14, the horizontal part upper surface of connecting plate 18 can be pressed to the part that dog 15 stretches out outside the mounting groove, when needs eccentric adjustment, unscrew the nut on dog 15, connecting plate 18 on carousel 5 can follow dog 15 relative motion like this, after eccentric adjustment is accomplished, through screwing up the nut on dog 15, make the part that dog 15 stretches out outside the mounting groove sticis on connecting plate 18 of carousel 5, accomplish the fixed of carousel 5.
In a specific embodiment, the crankshaft clamping mechanism is a self-centering three-jaw chuck, and comprises a chuck body 11 and three jaws 12; the chuck body 11 and the transition disc 6 are provided with screw holes, hexagonal cylindrical screws 8 penetrate through the screw holes, the hexagonal cylindrical screws 8 penetrate through the transition disc 6 and are screwed into the screw holes of the chuck body 11 to fix the chuck body 11 on the transition disc 6, and the chuck body 11 is arranged at the rotating center of the transition disc 6; the jack catch 12 is soft claw, and it has the keyway to open on one of them jack catch 12 and the bent axle contact's the terminal surface, installs key 13 on the keyway, key 13 protrusion in a part of keyway be used for with treat the draw-in groove looks block on the bent axle link of processing.
Therefore, the adopted crankshaft clamping mechanism is a common self-centering three-jaw chuck on the market, the clamping range can be 30mm to 120mm, and the clamping range is determined according to the shaft diameter of the crankshaft. After the chuck is installed, the bevel gear on the chuck is rotated by a wrench, the bevel gear drives the planar rectangular threads and then drives the three-jaw to move in a centripetal mode, and because the thread pitches of the planar rectangular threads are equal, the three-jaw movement distances are equal, and the automatic centering function is achieved. Simultaneously, one of the clamping jaws 12 is improved, a key groove is formed in the inner end face of each clamping jaw, a key 13 is installed in each key groove, the key 13 is clamped with a clamping groove formed in the crankshaft, the clamping effect of the crankshaft clamping mechanism on the crankshaft is improved, and the clamping stability is higher.
In a specific embodiment, the indexing adjustment mechanism includes a screw-tail taper pin 10, three indexing holes distributed in the same radius with the center of the transition disc 6 as the center of circle are uniformly distributed in the circumferential direction of the transition disc 6 and the rotary disc 5, indexing is performed at 120 degrees with the center of circle of the transition disc 6 as the center, the indexing holes on the transition disc 6 are through holes, the indexing holes on the rotary disc 5 are blind holes, the screw-tail taper pin 10 is inserted into the indexing holes overlapped with the transition disc 6 and the rotary disc 5, and the threaded end of the screw-tail taper pin 10 is located on the transition disc 6 and is matched with a nut.
Thus, when the indexing needs to be adjusted, firstly, the nut on the T-shaped bolt 9 on the transition disc 6 is unscrewed, then the screw tail taper pin 10 inserted in the indexing hole of the transition disc 6 is removed, so that the transition disc 6 can relatively rotate along the rotary disc 5, and because the indexing hole is divided by 120 degrees, when the next indexing hole on the transition disc 6 is superposed with the indexing hole on the rotary disc 5, the screw tail taper pin 10 is inserted again, the nut is screwed at the top of the screw tail taper pin 10 to be positioned, then the nut on the T-shaped bolt 9 is screwed and fixed, the indexing adjustment of the transition disc 6 is completed, and therefore different surfaces of the three-crank shaft are processed.
In a specific embodiment, the scale assembly comprises a main scale 16 and an auxiliary scale 17 attached to the main scale 16 in a sliding manner, the main scale 16 is vertically fixed on the baffle disc 1 and located on one side of the turntable 5 in the vertical direction, the auxiliary scale 17 is fixed on a connecting plate 18 on the turntable 5 and is in the same direction as the main scale 16, the auxiliary scale 17 is in sliding fit with the main scale 16, and the auxiliary scale 17 is attached to the surface of a graduation line of the main scale 16 so as to drive the auxiliary scale 17 to move along the length direction of the main scale 16 through the up-and-down movement of the turntable 5.
Thus, the scale assembly takes the form of a main scale 16 and a secondary scale 17 which read in the same manner as a vernier caliper with an accuracy of ± 0.02 mm. The up-down movement amount of the turntable 5 is obtained by reading the readings of the main ruler 16 and the auxiliary ruler 17, so that the number of the eccentric distance of the main shaft is reflected, the accurate measurement of the eccentric distance of the crankshaft is displayed, and the processing precision is ensured.
In the specific implementation process, the tail top plate assembly 7 comprises a tail top plate body, a horizontal blind hole for the tail end of the crankshaft to be pushed into is formed in the middle of the tail top plate body, and an opening sleeve 20 matched with the aperture of the blind hole is arranged on the hole wall ring of the blind hole; three thimble sleeves 21 are further arranged in the tail roof, and the three thimble sleeves 21 are mounted at the bottom of the blind hole and used for abutting against the end face of the tail end of the crankshaft; the top of the tail top plate is provided with a transverse installation through hole, the middle position in the installation through hole is communicated with the blind hole, and the top of the opening sleeve protrudes out of one part in the installation through hole; a transverse pressing sleeve 23 penetrates through the mounting through hole, the pressing sleeve 23 is divided into a left pressing sleeve 23 and a right pressing sleeve 23 at the middle position of the mounting hole, and the opposite end faces of the left pressing sleeve 23 and the right pressing sleeve 23 respectively abut against the circumferential face of the opening sleeve 20; a screw rod 22 transversely penetrates through the pressing sleeve 23, the outer end of the screw rod 22 is positioned outside the mounting hole, and a threaded sleeve 25 matched with the screw rod 22 is mounted at the other end of the mounting hole; a pressure spring 26 is sleeved at the middle section of the screw rod 22, a section of variable cross section is arranged on two sides of the middle part of the pressing sleeve 23 for mounting the pressure spring 26, and two ends of the pressure spring 26 respectively abut against the variable cross section of the pressing sleeve 23; two screw holes are formed in two sides of the top of the tail top plate, screws 24 are arranged on the screw holes, rectangular grooves are formed in the positions, close to the positions right below the screw holes, of the pressing sleeves, and the lower ends of the screws 24 abut against the surfaces of the rectangular grooves of the pressing sleeves 23 to prevent the pressing sleeves 23 from rotating. The bottom in the blind hole of the tail top plate body is provided with a key groove, and a mounting key is arranged in the key groove and is used for being matched with a groove of a crankshaft to be processed so as to prevent the crankshaft from rotating.
Like this, when specifically using, the tail end of waiting to process bent axle 19 is decided in the blind hole of tail roof board, the tail end terminal surface of bent axle supports on three thimble cover 21, then through rotatory screw rod 22 outside the tail roof board mounting hole, screw rod 22 is rotatory in to the mounting hole, drive left pressure cover 23 and move right, screw 24 lower extreme supports at pressing cover 23 upper surface, make pressure cover 23 can not rotate, only can be axial motion in the mounting hole, under the effect of screw rod 22, left side pressure cover 23 moves right and extrudees the periphery of opening cover, make opening cover top take place extrusion deformation, then make the opening cover hug closely the bent axle surface in the blind hole, press from both sides the bent axle tightly, pressure spring 26 mainly plays the effect that resets to left side pressure cover 23. The crankshaft is tightly pushed through the ejector pin, and the opening sleeve clamps the crankshaft, so that the clamping stability of the tail end of the crankshaft is guaranteed under the clamping and pushing dual effects of the tail ejection plate assembly. Meanwhile, when crankshafts with different eccentricities are machined, different tail top plate assemblies need to be replaced to adapt to the change of the eccentricities.
Finally, it is noted that the above-mentioned embodiments illustrate rather than limit the invention, and that, while the invention has been described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The utility model provides a general fixture that car bent axle three turned, includes fender dish, carousel, transition dish, bent axle fixture and tail roof subassembly, its characterized in that: the baffle disc is provided with a plurality of bolt holes and fixedly connected with a main shaft of the horizontal lathe through a bolt structure penetrated by the bolt holes; a lead screw transmission assembly used for enabling the rotary table to move up and down along the blocking disc is arranged between the blocking disc and the rotary table so as to adapt to processing of crankshafts with different eccentric distances, the rotary table is arranged on the lead screw transmission assembly, and the rotary table further comprises a locking mechanism used for locking and positioning the moved rotary table and a graduated scale assembly used for measuring the up-and-down movement amount of the rotary table; the transition disc is concentric with the axis of the rotary disc, an annular groove is further formed in the rotary disc, the section of the annular groove is inverted T-shaped, a plurality of T-shaped bolts are arranged on the annular groove, screw holes for the T-shaped bolts to penetrate through are formed in the transition disc and are fixed through nuts, and the transition disc is controlled to rotate along the rotary disc through the tightness degree of the nuts so as to adjust the indexing; the transition disc is also provided with an indexing adjusting mechanism which is used for positioning and locking the transition disc after the transition disc rotates for 120 degrees; the crankshaft clamping mechanism is fixedly arranged at the center of the transition disc and used for clamping and fixing one end of a crankshaft to be machined, and the tail top plate assembly is used for limiting and supporting the other end of the crankshaft.
2. The universal clamp for three throws of a vehicle crankshaft as claimed in claim 1, characterized in that: the lead screw transmission assembly comprises a lead screw and a nut, a guide seat for the lead screw to pass through is mounted at the top of the baffle disc, a through hole is formed in the guide seat, a bearing is arranged at the through hole, and the lead screw vertically passes through the through hole and is rotatably connected with the guide seat through the bearing; the nut is positioned on the screw rod below the guide seat and forms a screw rod nut pair mechanism with the screw rod; the nut is characterized in that a screw rod is transversely arranged on one side of the nut, a screw hole for the screw rod of the nut to pass through is correspondingly formed in the center of the rotary table, the screw rod end of the nut passes through the screw hole of the rotary table and then fixes the rotary table on the nut through a locking nut, and the rotary table can move up and down through the rotation of the screw rod.
3. The universal clamp for three throws of a vehicle crankshaft as claimed in claim 1, characterized in that: the locking mechanism comprises baffle plates which are arranged on the baffle disc and positioned at two sides of the rotary disc, the baffle plates are fixed on the baffle disc, a plurality of mounting grooves are formed in the baffle plates along the width direction, a baffle block is arranged in each mounting groove, and the length of each baffle block is greater than the groove width of each mounting groove so that one part of each baffle block extends out of one side outside the mounting groove; two sides of the back surface of the turntable facing the blocking disc are provided with connecting plates with L-shaped cross sections, the two connecting plates are positioned between the two baffles, and the bottoms of the connecting plates are contacted with the blocking disc; the part of the stop block extending out of the mounting groove faces the direction of the connecting plate, and the part of the stop block extending out of one side of the mounting groove is pressed on the upper surface of the horizontal part of the connecting plate, so that the stop disc and the rotary disc are limited and fixed; the mounting groove concave surface and the stop block are both provided with screw holes, bolts penetrate through the screw holes, penetrate through the stop plate and the stop block in sequence and protrude out of the upper surface of the stop block, and the end, protruding out of the upper surface of the stop block, of each bolt is matched with a nut and is tightly pressed on the connecting plate through the nut, so that the rotary table and the stop plate are locked and fixed.
4. The universal clamp for three throws of a vehicle crankshaft as claimed in claim 1, characterized in that: the crankshaft clamping mechanism is a self-centering three-jaw chuck and comprises a chuck body and three jaws; the chuck body and the transition disc are provided with screw holes, hexagonal cylindrical screws penetrate through the screw holes, the hexagonal cylindrical screws penetrate through the transition disc and are screwed into the screw holes of the chuck body to fix the chuck body on the transition disc, and the chuck body is arranged at the rotating center of the transition disc; the jack catch is soft claw, and it has the keyway to open on one of them jack catch and the bent axle contact's the terminal surface, installs the key on the keyway, a part of key protrusion in the keyway is used for with the draw-in groove looks block on the bent axle link of treating processing.
5. The universal clamp for three throws of a vehicle crankshaft as claimed in claim 1, characterized in that: the indexing adjustment mechanism comprises a screw tail taper pin, three indexing holes which are distributed in the same radius with the center of the transition disc as the center of a circle are uniformly distributed in the circumferential direction of the transition disc and the rotary disc, indexing is performed according to 120 degrees with the center of the transition disc as the center, the indexing holes in the transition disc are through holes, the indexing holes in the rotary disc are blind holes, the screw tail taper pin is inserted into the indexing holes which are overlapped with the transition disc and the rotary disc, and the threaded end of the screw tail taper pin is positioned on the transition disc and matched with a nut.
6. The universal clamp for three throws of a vehicle crankshaft as claimed in claim 1, characterized in that: the scale assembly comprises a main scale and an auxiliary scale attached to the main scale in a sliding manner, the main scale is vertically fixed on the blocking disc and located on one side of the vertical direction of the rotary table, the auxiliary scale is fixed on a connecting plate on the rotary table and is in the same direction with the main scale, the auxiliary scale is in sliding fit with the main scale and attached to the surface of a scale mark of the main scale in a manner that the auxiliary scale is driven to move along the length direction of the main scale through the up-and-down movement of the rotary table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020863466.5U CN212071118U (en) | 2020-05-21 | 2020-05-21 | Universal fixture for turning three cranks of crankshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020863466.5U CN212071118U (en) | 2020-05-21 | 2020-05-21 | Universal fixture for turning three cranks of crankshaft |
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| Publication Number | Publication Date |
|---|---|
| CN212071118U true CN212071118U (en) | 2020-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020863466.5U Active CN212071118U (en) | 2020-05-21 | 2020-05-21 | Universal fixture for turning three cranks of crankshaft |
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| Country | Link |
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| CN (1) | CN212071118U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113320718A (en) * | 2021-06-21 | 2021-08-31 | 上海卫星工程研究所 | Novel replaceable module butt joint device |
| CN113829088A (en) * | 2021-11-30 | 2021-12-24 | 天津海鸥表业集团有限公司 | Core shifting claw positioning tool |
-
2020
- 2020-05-21 CN CN202020863466.5U patent/CN212071118U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113320718A (en) * | 2021-06-21 | 2021-08-31 | 上海卫星工程研究所 | Novel replaceable module butt joint device |
| CN113320718B (en) * | 2021-06-21 | 2022-12-13 | 上海卫星工程研究所 | Replaceable module butt joint device |
| CN113829088A (en) * | 2021-11-30 | 2021-12-24 | 天津海鸥表业集团有限公司 | Core shifting claw positioning tool |
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