CN111468990A - Internal combustion engine crankshaft finish machining process - Google Patents
Internal combustion engine crankshaft finish machining process Download PDFInfo
- Publication number
- CN111468990A CN111468990A CN202010356050.9A CN202010356050A CN111468990A CN 111468990 A CN111468990 A CN 111468990A CN 202010356050 A CN202010356050 A CN 202010356050A CN 111468990 A CN111468990 A CN 111468990A
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- Prior art keywords
- frame
- motor
- crankshaft
- clamping
- rotating
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
- B24B21/02—Machines or devices using grinding or polishing belts; Accessories therefor for grinding rotationally symmetrical surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
- B24B21/18—Accessories
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/07—Crankshafts
Abstract
The invention relates to a crankshaft finish machining process of an internal combustion engine, which uses a crankshaft finish machining device, wherein the crankshaft finish machining device comprises a base, a clamping unit and a polishing unit, the clamping unit is arranged on the front side of the upper end of the base, and the polishing unit is arranged on the rear side of the upper end of the base; according to the invention, by adopting a belt polishing mode, the effect of polishing the main journal and the connecting journal of the crankshaft simultaneously through one structure can be achieved by utilizing the elasticity of the belt, and the problem that the polishing device cannot be simultaneously and effectively attached to the main journal and the connecting journal, so that the finish machining effect on the crankshaft connecting journal is not obvious is solved; according to the invention, the rotating crankshaft is shaken in a left-right reciprocating manner, so that the polishing belt can completely polish the outer surface of the crankshaft journal, and the polishing belt is prevented from being incapable of completely covering the outer surface of the crankshaft journal.
Description
Technical Field
The invention relates to the technical field of engine processing, in particular to a finish machining process for a crankshaft of an internal combustion engine.
Background
The crankshaft is the most important component in the engine. It takes the force from the connecting rod and converts it into torque to be output by the crankshaft and drive other accessories on the engine. The crankshaft is subjected to the combined action of centrifugal force of the rotating mass, gas inertia force of periodic variation and reciprocating inertia force, so that the crankshaft is subjected to the action of bending and twisting load. Therefore, the crankshaft is required to have sufficient strength and rigidity, and the surface of the journal needs to be wear-resistant, work uniformly and balance well. The engine speed is generally referred to as the crankshaft speed.
The crankshaft is often required to be subjected to finish machining in the machining process of the crankshaft, and the following problems are often caused in the process of grinding the outer surface of a crankshaft journal: firstly, because the crankshaft comprises a main journal, a connecting journal and other parts, when the crankshaft rotates, the motion track of the connecting journal is consistent with the cam, so that the main journal and the connecting journal are not positioned on the same plane, and the motion track of the connecting journal is not positioned on the same plane, so that the grinding device cannot be effectively attached to the main journal and the connecting journal, and the finish machining effect on the crankshaft is not obvious; when crankshafts of different specifications face, the grinding blocks which are matched with the connecting shaft necks to feed need to be adjusted, so that the grinding blocks which are too large to be adjusted cannot fit with the motion tracks of the connecting shaft necks, and the finish machining effect of the connecting shaft necks is poor.
Disclosure of Invention
The invention aims to provide a finish machining process for a crankshaft of an internal combustion engine, which has the functions of simultaneously polishing a main journal and a connecting journal of the crankshaft and the like by automatically adjusting a belt, and solves the problems.
The finish machining process for the crankshaft of the internal combustion engine uses a crankshaft finish machining device, the crankshaft finish machining device comprises a base, a clamping unit and a polishing unit, and the finish machining method for the crankshaft by adopting the crankshaft finish machining device further comprises the following steps:
s1, loading operation: the crankshaft is fixedly clamped through the clamping unit;
s2, finishing operation: finishing the surface of the crankshaft fixed in step S1 by a grinding unit;
s3, drilling: opening oil holes in the crankshaft journal subjected to the finish machining in the step S2 in a manual or mechanical auxiliary mode;
s6, stacking and warehousing: putting the crankshafts provided with the oil holes in the step S3 into a warehouse, and stacking;
the front side of the upper end of the base is provided with a clamping unit, and the rear side of the upper end of the base is provided with a polishing unit; the clamping unit carries out effectual centre gripping to the bent axle, and the unit of polishing is polished crankshaft main journal and is connected the axle journal surface.
The clamping unit comprises a clamping seat, a rotating motor, a rotating cam, an auxiliary spring, a clamping mechanism and a rotating mechanism, a chute is formed in the upper end of the clamping seat, the clamping seat is connected with the chute in a sliding mode, the rotating motor is arranged on the inner wall of the lower end of the chute through a motor seat, the rotating cam is arranged at the upper end of the output end of the rotating motor, the auxiliary spring is arranged at the right end of the clamping seat, the clamping mechanism is arranged on the left side of the upper end of the clamping seat, and the rotating mechanism is; the fixture centre gripping fixed crankshaft's one end, rotary mechanism supports the other end of bent axle to supplementary bent axle is rotatory, and the rotating electrical machines drives the grip slipper through rotatory cam and feeds to the right side, and the auxiliary spring drives the grip slipper and resets to the left side, thereby when the unit of polishing is polished crankshaft main journal and is connected the journal surface, the grip slipper drives the reciprocal shake about the bent axle, thereby make the unit of polishing more comprehensive to the polishing of crankshaft main journal and connection journal surface.
The clamping mechanism comprises a clamping frame, a driving motor, a rotating frame, a switching motor, a threaded plate and a clamping block, wherein the clamping frame is arranged on the left side of the upper end of the base; the opening and closing motor drives the clamping block to feed inwards through the threaded plate, so that the clamping block fixes one end of the crankshaft, and the fixed crankshaft is driven to rotate through the driving motor.
The unit of polishing include the cylinder frame, rotate the post, the frame of polishing, the motor frame, grinding motor, grinding machanism, resilience mechanism and push down and change the handle, the cylinder frame bilateral symmetry is seted up in the base upper end, it passes through the bearing setting between the cylinder frame to rotate the post, the frame of polishing sets up in the cylinder upper end, the frame right-hand member of polishing is provided with the motor frame, be provided with grinding motor on the inner wall of motor frame right-hand member, grinding machanism sets up about the frame of polishing between the both ends inner wall, resilience mechanism sets up on cylinder frame outer end inner wall, it is provided with and pushes down and changes the handle. The grinding mechanism is driven to operate through the grinding motor, the grinding mechanism is driven to turn downwards to feed through manual operation of pressing and rotating, and therefore grinding treatment is conducted on the outer surfaces of the crankshaft main journal and the connecting journal which shake left and right in a reciprocating mode.
As a preferred scheme of the invention, the rotating mechanism comprises a feeding motor, a threaded column, a moving plate, a rotating port and a friction pad, the upper end of the clamping seat is provided with a feeding groove, the inner wall of the left end of the feeding groove is provided with the feeding motor through a motor seat, the right end of the output end of the feeding motor is provided with the threaded column, the moving plate is connected with the feeding groove in a sliding mode, the moving plate is connected with the threaded column in a threaded connection mode, the rotating port is arranged on the inner wall of the right end of the moving plate through a bearing, and the inner wall of the right end of the rotating. The feeding motor drives the moving plate to feed rightwards through the threaded column, the rotating port abuts against the other end of the crankshaft, and the friction pad increases friction between the crankshaft and the rotating port, so that the rotating port is driven to rotate together when the crankshaft rotates, and the rotating port is prevented from causing abrasion to the crankshaft.
As a preferable scheme of the invention, the cross section of the rotary port is a V-shaped structure with a leftward opening.
As a preferred scheme of the invention, the polishing mechanism comprises an L-type frame, a driving shaft, a driven shaft, a matching wheel and a polishing belt, wherein the L-type frame is arranged at the upper end of a rotating column, the driving shaft is arranged on the rear side of the inner wall of the left end of the L-type frame through a bearing, the driven shaft is arranged on the front side of the inner wall of the left end of the L-type frame through a bearing, the output end of the polishing motor is connected with the right end of the driving shaft through a coupler, the matching wheel is uniformly arranged on the outer wall of the rotating column through the bearing from left to right, the driving shaft, the driven shaft and the matching wheel are connected through the polishing belt, the driving shaft drives the driven shaft and the matching wheel to rotate through the polishing belt, the polishing belt polishes the outer surfaces of a crankshaft main journal and a connecting journal, the polishing belt has certain elasticity, so that the polishing belt can fit the motion track of the connecting journal, the contact area of the crankshaft main journal and the connecting journal is far larger than that of common polishing blocks.
As a preferable scheme of the invention, the rebounding mechanism comprises a supporting ring, a rotating plate, a baffle and a return spring, wherein the supporting ring is arranged on the inner wall of the rear end of the cylindrical frame, the rotating plate is arranged at the upper end of the rotating column, the baffle is arranged on the inner wall of the lower end of the cylindrical frame, the rotating plate and the baffle are connected through the return spring, and the return spring pushes the rotating plate to rotate upwards for return.
(III) advantageous effects
1. According to the invention, by adopting a belt polishing mode, the effect of polishing the main journal and the connecting journal of the crankshaft simultaneously through one structure can be achieved by utilizing the elasticity of the belt, and the problem that the polishing device cannot be simultaneously and effectively attached to the main journal and the connecting journal, so that the finish machining effect on the crankshaft connecting journal is not obvious is solved; according to the invention, the rotating crankshaft is shaken in a left-right reciprocating manner, so that the polishing belt can completely polish the outer surface of the crankshaft journal, and the polishing belt is prevented from being incapable of completely covering the outer surface of the crankshaft journal.
2. According to the invention, the driving shaft is driven to rotate by the arranged grinding motor, the driving shaft drives the driven shaft and the matching wheel to rotate by the grinding belt, the grinding belt carries out grinding treatment on the outer surfaces of the crankshaft main journal and the connecting journal, the grinding belt has certain elasticity, so that the grinding belt can be matched with the movement track of the connecting journal, the contact area between the grinding belt and the crankshaft main journal and the contact area between the grinding belt and the connecting journal are far larger than those of a common grinding block, and when crankshafts of different specifications are machined, the grinding belt can well complete grinding treatment without adjustment. .
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a process flow diagram of the present invention for finishing a crankshaft;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a cross-sectional view taken along section A-A of FIG. 2 in accordance with the present invention;
FIG. 4 is a cross-sectional view taken along section B-B of FIG. 2 in accordance with the present invention;
FIG. 5 is an enlarged view of a portion I of FIG. 3 in accordance with the present invention;
FIG. 6 is a schematic view of the structure of the rebounding mechanism of the present invention;
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
As shown in fig. 1 to 6, a finishing process for a crankshaft of an internal combustion engine uses a crankshaft finishing device, the crankshaft finishing device comprises a base 1, a clamping unit 2 and a grinding unit 3, and the finishing method for the crankshaft by using the crankshaft finishing device further comprises the following steps:
s1, loading operation: the crankshaft is fixedly clamped through the clamping unit 2;
s2, finishing operation: finishing the surface of the crankshaft fixed in step S1 by the grinding unit 3;
s3, drilling: opening oil holes in the crankshaft journal subjected to the finish machining in the step S2 in a manual or mechanical auxiliary mode;
s6, stacking and warehousing: putting the crankshafts provided with the oil holes in the step S3 into a warehouse, and stacking;
the front side of the upper end of the base 1 is provided with a clamping unit 2, and the rear side of the upper end of the base 1 is provided with a polishing unit 3; the clamping unit 2 is used for effectively clamping the crankshaft, and the polishing unit 3 is used for polishing the outer surfaces of a main journal and a connecting journal of the crankshaft.
The clamping unit 2 comprises a clamping seat 21, a rotating motor 22, a rotating cam 23, an auxiliary spring 24, a clamping mechanism 25 and a rotating mechanism 26, a sliding groove is formed in the upper end of the base 1, the clamping seat 21 is connected with the sliding groove in a sliding mode, the rotating motor 22 is arranged on the inner wall of the lower end of the sliding groove through a motor seat, the rotating cam 23 is arranged at the upper end of the output end of the rotating motor 22, the auxiliary spring 24 is arranged at the right end of the clamping seat 21, the clamping mechanism 25 is arranged on the left side of the upper end of the clamping seat 21, and the rotating mechanism 26 is arranged; fixture 25 centre gripping fixed crankshaft's one end, rotary mechanism 26 supports the other end of bent axle, and the supplementary bent axle is rotatory, rotating electrical machines 22 drives holder 21 through rotatory cam 23 and feeds right, and auxiliary spring 24 drives holder 21 and resets left, thereby when polishing unit 3 and polish crankshaft main journal and connection journal surface, holder 21 drives the reciprocal shake about the bent axle, thereby it is more comprehensive to make polishing unit 3 to the polishing of crankshaft main journal and connection journal surface.
The clamping mechanism 25 comprises a clamping frame 251, a driving motor 252, a rotating frame 253, an opening and closing frame 254, an opening and closing motor 255, a threaded plate 256 and a clamping block 257, wherein the clamping frame 251 is arranged on the left side of the upper end of the base 1, the driving motor 252 is arranged at the left end of the clamping frame 251 through a motor support, the rotating frame 253 is arranged on the inner wall of the clamping frame 251 through a bearing, the output end of the driving motor 252 is connected with the left end of the rotating frame 253 through a coupler, the opening and closing frame 254 is arranged at the inner end of the rotating frame 253, the opening and closing motor 255 is arranged on the inner wall of the left end of the opening and closing frame through a motor base, the threaded plate 256 is arranged at the right end of the output end of the opening and closing motor 255, clamping grooves are uniformly formed in the axial direction at the right; the opening and closing motor 255 drives the fixture block 257 to feed inwards through the threaded plate 256, so that one end of the crankshaft is fixed through the fixture block 257, and the fixed crankshaft is driven to rotate through the driving motor 252.
The rotating mechanism 26 comprises a feeding motor 261, a threaded column 262, a moving plate 263, a rotating opening 264 and a friction pad 265, a feeding groove is formed in the upper end of the clamping base 21, the feeding motor 261 is arranged on the inner wall of the left end of the feeding groove through a motor base, the threaded column 262 is arranged at the right end of the output end of the feeding motor 261, the moving plate 263 is connected with the feeding groove in a sliding mode, the moving plate 263 is connected with the threaded column 262 in a threaded connection mode, the rotating opening 264 is arranged on the inner wall of the right end of the moving plate 263 through a bearing, and the friction pad 265 is arranged on the inner wall of. The cross section of the rotary opening 264 is a V-shaped structure with a left opening. The feeding motor 261 drives the moving plate 263 to feed rightwards through the threaded column 262, and the moving plate 263 abuts against the other end of the crankshaft through the rotating port 264, and the friction pad 265 increases the friction between the crankshaft and the rotating port 264, so that the rotating port 264 is driven to rotate together when the crankshaft rotates, and the crankshaft is prevented from being abraded by the rotating port 264.
The grinding mechanism 36 comprises an L-shaped frame 361, a driving shaft 362, a driven shaft 363, a matching wheel 364 and a grinding belt 365, the L-shaped frame 361 is arranged at the upper end of the rotating column 32, the driving shaft 362 is arranged on the rear side of the inner wall of the left end of the L-shaped frame 361 through a bearing, the driven shaft 363 is arranged on the front side of the inner wall of the left end of the L-shaped frame 361 through a bearing, the output end of the grinding motor 35 is connected with the right end of the driving shaft 362 through a coupler, the matching wheel 364 is uniformly arranged on the outer wall of the rotating column 32 through a bearing from left to right, the driving shaft 362, the driven shaft 363 and the matching wheel 364 are connected through the grinding belt 365, the driving shaft 362 drives the driven shaft 363 and the matching main shaft 364 to rotate through the grinding belt 365, the grinding belt 365 grinds the outer surfaces of a crankshaft journal and a connecting journal, the grinding belt 365 has certain elasticity, so that the grinding belt 365 can be matched with the motion track of the connecting journal, and the contact area of the crankshaft main journal and the connecting journal is far larger than that the grinding block are used when cranks.
The rebounding mechanism 37 comprises a support ring 371, a rotating plate 372, a baffle 373 and a return spring 374, wherein the support ring 371 is arranged on the inner wall of the rear end of the cylindrical frame 31, the rotating plate 372 is arranged at the upper end of the rotating column 32, the baffle 373 is arranged on the inner wall of the lower end of the cylindrical frame 31, and the rotating plate 372 and the baffle 373 are connected through the return spring 374. The rotating plate 372 and the blocking plate 373 are connected through a return spring 374, and the return spring 374 pushes the rotating plate 372 to rotate upwards for return.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides an internal-combustion engine crankshaft finish machining technology, its used a crankshaft finish machining device, this crankshaft finish machining device includes base (1), clamping unit (2) and unit (3) of polishing, its characterized in that: the finish machining method for the crankshaft by adopting the crankshaft finish machining device further comprises the following steps:
s1, loading operation: the crankshaft is fixedly clamped through the clamping unit (2);
s2, finishing operation: finishing the surface of the crankshaft fixed in step S1 by a grinding unit (3);
s3, drilling: opening oil holes in the crankshaft journal subjected to the finish machining in the step S2 in a manual or mechanical auxiliary mode;
s6, stacking and warehousing: putting the crankshafts provided with the oil holes in the step S3 into a warehouse, and stacking;
the front side of the upper end of the base (1) is provided with a clamping unit (2), and the rear side of the upper end of the base (1) is provided with a polishing unit (3);
the clamping unit (2) comprises a clamping seat (21), a rotating motor (22), a rotating cam (23), an auxiliary spring (24), a clamping mechanism (25) and a rotating mechanism (26), a sliding groove is formed in the upper end of the base (1), the clamping seat (21) is connected with the sliding groove in a sliding mode, the rotating motor (22) is arranged on the inner wall of the lower end of the sliding groove through a motor seat, the rotating cam (23) is arranged at the upper end of the output end of the rotating motor (22), the auxiliary spring (24) is arranged at the right end of the clamping seat (21), the clamping mechanism (25) is arranged on the left side of the upper end of the clamping seat (21), and the rotating mechanism (26);
the clamping mechanism (25) comprises a clamping frame (251), a driving motor (252), a rotating frame (253), an opening and closing frame (254), an opening and closing motor (255), a threaded plate (256) and a clamping block (257), the clamping frame (251) is arranged on the left side of the upper end of the base (1), the driving motor (252) is arranged at the left end of the clamping frame (251) through a motor support, the rotating frame (253) is arranged on the inner wall of the clamping frame (251) through a bearing, the output end of the driving motor (252) is connected with the left end of the rotating frame (253) through a coupling, the opening and closing frame (254) is arranged at the inner end of the rotating frame (253), the opening and closing motor (255) is arranged on the inner wall of the left end of the opening and closing frame through a motor base, the right end of the output end of the opening and closing motor (255) is provided with a threaded plate (256), the right end of the opening and closing frame is uniformly provided with clamping grooves along the axial direction, the clamping block (257) is connected with the clamping;
polishing unit (3) including cylinder frame (31), rotate post (32), polish frame (33), motor frame (34), polishing motor (35), grinding machanism (36), resilience mechanism (37) and push down and change (38), cylinder frame (31) bilateral symmetry sets up in base (1) upper end, it sets up between cylinder frame (31) to rotate post (32) through the bearing, it sets up in the cylinder upper end to polish frame (33), it is provided with motor frame (34) to polish frame (33) right-hand member, be provided with polishing motor (35) on motor frame (34) right-hand member inner wall, grinding machanism (36) set up polish about frame (33) between the both ends inner wall, resilience mechanism (37) set up on cylinder frame (31) outer end inner wall, it is provided with push down and changes (38) to rotate post (32) right-hand member.
2. An internal combustion engine crankshaft finishing process according to claim 1, wherein: rotary mechanism (26) including feeding motor (261), screw thread post (262), movable plate (263), rotation mouth (264) and friction pad (265), the feed groove has been seted up to centre gripping seat (21) upper end, be provided with feeding motor (261) through the motor cabinet on the inner wall of feed groove left end, feeding motor (261) output right-hand member is provided with screw thread post (262), movable plate (263) are connected with the feed groove through the sliding mode, movable plate (263) are connected with screw thread post (262) through the threaded connection mode, rotation mouth (264) set up on movable plate (263) right-hand member inner wall through the bearing, be provided with friction pad (265) on rotation mouth (264) right-hand member inner wall.
3. An internal combustion engine crankshaft finishing process according to claim 2, wherein: the cross section of the rotary opening (264) is a V-shaped structure with a leftward opening.
4. The internal combustion engine crankshaft finish machining process according to claim 1, characterized in that the grinding mechanism (36) comprises an L-shaped frame (361), a driving shaft (362), a driven shaft (363), a matching wheel (364) and a grinding belt (365), the L-shaped frame (361) is arranged at the upper end of the rotating column (32), the driving shaft (362) is arranged on the rear side of the inner wall of the left end of the L-shaped frame (361) through a bearing, the driven shaft (363) is arranged on the front side of the inner wall of the left end of the L-shaped frame (361) through a bearing, the output end of the grinding motor (35) is connected with the right end of the driving shaft (362) through a coupling, the matching wheel (364) is uniformly arranged on the outer wall of the rotating column (32) through the bearing from left to right, and the driving shaft (362), the driven shaft (363).
5. An internal combustion engine crankshaft finishing process according to claim 1, wherein: rebound mechanism (37) including support ring (371), rotor plate (372), baffle (373) and reset spring (374), support ring (371) set up on cylinder frame (31) rear end inner wall, rotor plate (372) are provided with to rotor (32) upper end, are provided with baffle (373) on cylinder frame (31) lower extreme inner wall, link to each other through reset spring (374) between rotor plate (372) and the baffle (373).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010356050.9A CN111468990A (en) | 2020-04-29 | 2020-04-29 | Internal combustion engine crankshaft finish machining process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010356050.9A CN111468990A (en) | 2020-04-29 | 2020-04-29 | Internal combustion engine crankshaft finish machining process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111468990A true CN111468990A (en) | 2020-07-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010356050.9A Withdrawn CN111468990A (en) | 2020-04-29 | 2020-04-29 | Internal combustion engine crankshaft finish machining process |
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| CN (1) | CN111468990A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112221410A (en) * | 2020-11-05 | 2021-01-15 | 宁波辉驰泰新能源科技有限公司 | Preparation method of high polymer modified asphalt waterproof coating |
-
2020
- 2020-04-29 CN CN202010356050.9A patent/CN111468990A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112221410A (en) * | 2020-11-05 | 2021-01-15 | 宁波辉驰泰新能源科技有限公司 | Preparation method of high polymer modified asphalt waterproof coating |
| CN112221410B (en) * | 2020-11-05 | 2021-05-25 | 广州犀鳄建材有限公司 | Preparation method of high polymer modified asphalt waterproof coating |
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Application publication date: 20200731 |
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