CN117847197B - Crankshaft transmission structure and processing method - Google Patents
Crankshaft transmission structure and processing method Download PDFInfo
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- CN117847197B CN117847197B CN202410249307.9A CN202410249307A CN117847197B CN 117847197 B CN117847197 B CN 117847197B CN 202410249307 A CN202410249307 A CN 202410249307A CN 117847197 B CN117847197 B CN 117847197B
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- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The application relates to the technical field of mechanical transmission structures, and discloses a crankshaft transmission structure and a processing method, wherein the crankshaft transmission structure comprises a driving shaft, an eccentric shaft and a connecting shaft, and a connecting rod assembly which is connected in a cylinder unit compression groove in a sliding manner is arranged on the connecting shaft; the driving shaft is rotationally connected to the crank case, a gap is arranged between the crank case and the driving shaft, and sealing gaskets are arranged at two ends of the driving shaft positioned in the gap so as to form a lubricating liquid cavity; a driving shaft positioned in the lubricating liquid cavity is provided with a bidirectional thread, the end part of the crankcase corresponding to the lubricating liquid cavity is provided with a first liquid port, and the joint of the crankcase corresponding to the bidirectional thread is provided with a second liquid port; the first liquid port and the second liquid port are respectively connected to the lubricating liquid supply assembly. The application has the advantage of improving the lubrication effect between the transmission structures.
Description
Technical Field
The application relates to the technical field of mechanical transmission structures, in particular to a crankshaft transmission structure and a processing method.
Background
In the mechanical transmission structure, lubrication is often needed by using a lubricating liquid, and the lubricating liquid has a plurality of advantages, so that a layer of oil film can be formed between contact surfaces by the lubricating liquid, thereby reducing friction coefficient and reducing abrasion among mechanical parts. Meanwhile, heat is generated due to friction, and the lubricating liquid can also play a role in cooling, so that heat dissipation is facilitated. And the lubricating liquid can also carry impurities and particles on the surfaces of the mechanical parts, so that the surface cleanliness of the mechanical structure is maintained, and the abrasion and fault risks are reduced. The lubricating fluid generally contains rust-proof and corrosion-proof additives, and can form a protective film on the surface of a mechanical part to prevent corrosion of corrosion factors such as moisture, oxygen and the like. Under the condition of high-speed running or impact load, the lubricating liquid can play a certain role in buffering and damping, and mechanical parts are protected from being damaged.
For example, the crankshaft is subjected to the combined action of centrifugal force of rotating mass, periodically-changed gas inertia force and reciprocating inertia force, so that the crankshaft is subjected to bending and torsion load; a lubricating fluid is required for lubrication. The prior art CN219062401U discloses a forced lubrication device for crank drive, comprising a crank shaft, a bearing seat, an overflow valve and a lubrication pump outlet, wherein a crank bearing is arranged at one end opening of the bearing seat, the crank shaft is arranged at the crank bearing seat, the inner cavity of the bearing seat forms a lubrication oil inner box, the body of the bearing seat is provided with the overflow valve connected with the lubrication oil inner box and a cavity at the crank bearing, the upper end of the bearing seat is provided with the lubrication pump outlet for injecting lubrication oil into the lubrication oil inner box, and the lubrication pump outlet is connected with a lubrication oil suction pipe through a lubrication oil pump; a fixed sleeve is arranged at the communicating part of the overflow valve of the lubricating oil inner box, one end of the fixed sleeve is provided with a baffle ring, and an oil inlet bin is formed by the fixed sleeve and the inner cavity of the baffle ring; the upper end recess of fixed cover forms first cavity, and the intracavity of first cavity is equipped with the first filtration sponge that is used for blockking impurity entering overflow valve, and oil outlet and oil feed storehouse intercommunication have been seted up to the chamber wall of first cavity, and the outer end recess of backing ring forms the second cavity, and is equipped with the second filtration sponge that is used for blockking impurity entering bent axle and crank shaft bearing in the second cavity, and the second cavity passes through oil outlet and oil feed storehouse intercommunication, and oil feed storehouse is through filtering sponge injection lubricating oil to bent axle and crank shaft bearing department realization lubrication.
However, in the above-mentioned lubrication method, the lubrication liquid is pumped by pumping, and the lubrication liquid enters from the inlet to the outlet of the channel to be lubricated of the transmission structure, but the structure of the lubrication channel of the transmission structure is generally a curved space, and the movement direction of the lubrication liquid is uncontrolled, so that bubbles are easy to exist, the lubrication effect is poor, and the lubrication cannot be performed effectively and continuously, so that improvement is needed.
Disclosure of Invention
In order to improve the lubrication effect between transmission structures, the application provides a crankshaft transmission structure and a processing method.
On one hand, the crankshaft transmission structure provided by the application adopts the following technical scheme:
The crankshaft transmission structure comprises a driving shaft, an eccentric shaft and a connecting shaft, wherein a connecting rod assembly which is connected in a sliding manner in a compression groove of a cylinder unit is arranged on the connecting shaft; the driving shaft is rotationally connected to the crank case, a gap is arranged between the crank case and the driving shaft, and sealing gaskets are arranged at two ends of the driving shaft in the gap so as to form a lubricating liquid cavity; the driving shaft positioned in the lubricating liquid cavity is provided with a bidirectional thread, the end part of the crankcase corresponding to the lubricating liquid cavity is provided with a first liquid port, and the joint of the crankcase corresponding to the bidirectional thread is provided with a second liquid port; the first liquid port and the second liquid port are respectively connected to a lubricating liquid supply assembly.
By adopting the technical scheme, based on the rotation of the driving shaft, the bidirectional threads are utilized to push the lubricating liquid towards the second liquid port in opposite directions, so that the lubricating liquid can be pushed and lubricated in a set path and rotating mode, the lubricating liquid level is moved to pass through each part of the lubricating liquid cavity as much as possible, the generation of bubbles is reduced, and the lubricating effect is improved; according to the scheme, the structure between the crankshaft and the crankcase is improved, so that the lubricating liquid path is adjusted, lubricating oil can be conveyed according to a set path, and accordingly lubrication is performed, the possibility of bubble generation is reduced, and the lubricating effect is improved; in addition, the driving shaft can be reversely rotated, and the effect that the lubricating liquid is filled in the lubricating liquid cavity by multiple areas can be achieved. In this scheme, for the mode of pumping lubricating liquid among the prior art, utilize the rotation of drive shaft can provide power for the flow of lubricating liquid, accelerate the flow of lubricating liquid, perhaps in the rotation in-process of drive shaft, do not need to set up the power pump alone and pump the lubricating liquid, utilize the rotation of drive shaft indirect as the power supply to help reducing the energy consumption.
Optionally, one end of the driving shaft located in the lubricating liquid cavity is provided with a plurality of arc grooves along the circumference of the driving shaft, and the arc grooves are rotatably arranged at positions corresponding to the first liquid through holes.
Through adopting above-mentioned technical scheme, when first logical liquid mouth is the inlet, the arc groove is as guiding buffer tank, reduces the impact force that the lubricated liquid intracavity produced to the drive shaft that flows into, and at drive shaft pivoted in-process, the arc groove follows and rotates, and the lateral wall of adjacent arc groove can be regarded as the blade that stirs to be favorable to making the drive shaft play the effect of pump pressure.
Optionally, the bottom of arc wall sets up to the inclined plane, the bottom of arc wall is close to adjacent one side of sealing gasket is the low end, and corresponds first liquid port, the bottom of arc wall is close to one side of two-way screw thread sets up to the high end.
By adopting the technical scheme, the depth of the arc-shaped groove is changed, so that the lubrication liquid can be guided to flow into the gap in the lubrication liquid cavity, and a better lubrication effect can be realized.
Optionally, the arcuate slot extends in an axial direction of the drive shaft.
By adopting the technical scheme, the axially extending arc-shaped groove is beneficial to guiding the lubricating liquid to flow towards the bidirectional threads.
Optionally, the arcuate slot extends in an axial direction and a circumferential direction of the drive shaft.
Through adopting above-mentioned technical scheme for the arc groove is the heliciform, thereby is favorable to increasing the pumping effect of drive shaft to the lubricating liquid, promotes the lubricating liquid to flow according to the direction of setting for, reduces the lubricating liquid and produces the possibility of revealing towards deviating from pumping direction one side.
Optionally, the crankcase is close to the inner wall of arc wall is provided with flexible groove, be provided with the flexible butt subassembly of elasticity in the flexible groove, the flexible butt subassembly of elasticity includes elastic component and butt piece, elastic component one end fixedly connected to in the flexible groove, the other end fixedly connected to the butt piece, the butt piece is used for the butt to the inner wall of arc wall.
Through adopting above-mentioned technical scheme, realize the promotion to the intraductal lubrication liquid of arc through the butt piece in the flexible butt subassembly of elasticity for lubrication liquid receives the extrusion of arc wall inner wall, and the synchronous extrusion effect of butt piece, further increases the effect of drive shaft to the lubrication liquid pump.
Optionally, a filter gasket is disposed in the lubricating fluid cavity corresponding to the first fluid port, and the filter gasket is disposed between the arc-shaped groove and the bidirectional thread.
Through adopting above-mentioned technical scheme, filter the impurity that the gasket was favorable to filtering in the lubrication fluid, perhaps the lubrication fluid takes away from the lubrication fluid chamber impurity to be favorable to reducing impurity and to drive the wearing and tearing between the structure, improve lubricated effect.
Optionally, the bidirectional threads are male threads or female threads, and the thread pitch is greater than or equal to the width of the threads.
By adopting the technical scheme, the spiral shape of the male screw can effectively pump lubricating liquid when the male screw rotates. As the threads rotate, the lubrication fluid is gradually pushed to the thread interface of the bi-directional threads and is pushed to the second fluid port during rotation of the threads. This pumping action may promote circulation and distribution of the lubricating fluid in the lubricating fluid chamber.
Optionally, when the bidirectional thread is set as a female thread, the depth of the female thread gradually decreases or gradually increases from the first liquid through hole to the second liquid through hole; when the bidirectional threads are arranged as the convex threads, the height of the convex threads gradually decreases or gradually increases from the first liquid through hole to the second liquid through hole.
By adopting the technical scheme, the change of the thread depth is beneficial to adjusting the flow of the lubricating liquid.
On the other hand, the processing method of the crankshaft transmission structure provided by the application adopts the following technical scheme:
A method for machining a crank drive structure, based on any one of the above, comprising the steps of:
Semi-finish grinding the crankshaft and the crankcase;
finely grinding the crankshaft and the crank case;
finely boring the first liquid port, the second liquid port, the arc-shaped groove and the bidirectional threads;
Deburring the crankshaft and the crankcase after finish grinding;
Brushing the crankshaft and the crankcase after deburring;
cleaning the brushed crankshaft and the brushed crankcase;
Installing a filter gasket at the first liquid port;
the sealing gasket is sleeved on the driving shaft, and the driving shaft is installed in the crankcase.
In summary, the present application includes at least one of the following beneficial technical effects: the structure between the crankshaft and the crankcase is improved to realize the adjustment of a lubricated liquid path, so that the lubricating oil can be conveyed according to a set path, and the lubricating is performed, so that the possibility of bubble generation is reduced, and the lubricating effect is improved; in addition, the driving shaft can be reversely rotated, and the effect that the lubricating liquid is filled in the lubricating liquid cavity by multiple areas can be achieved.
Drawings
Fig. 1 is a schematic overall structure of an embodiment of the present application.
Fig. 2 is a cross-sectional view taken along A-A in fig. 1.
Fig. 3 is an enlarged view of a portion a in fig. 2.
Fig. 4 is a schematic diagram mainly illustrating a structure of a crankshaft in an embodiment of the present application.
Fig. 5 is a cross-sectional view taken along B-B in fig. 4.
Fig. 6 is a partial cross-sectional view of a bi-directional thread as a male thread.
Fig. 7 is a partial cross-sectional view of a bi-directional thread as a female thread.
Fig. 8 is a partial schematic view of a bi-directional thread being a female thread.
Fig. 9 is an enlarged schematic view of the portion B in fig. 8.
Reference numerals: 1. a drive shaft; 2. an eccentric shaft; 3. a connecting shaft; 4. a connecting rod assembly; 5. a crankcase; 6. a lubrication fluid passage; 7. a sealing gasket; 8. a lubricating fluid chamber; 9. a bi-directional thread; 10. a first liquid port; 11. a second liquid port; 12. an arc-shaped groove; 13. a telescopic slot; 14. an elastic member; 15. an abutment; 16. a filter pad; 17. filtering the micropores; 18. sealing the valve cover.
Detailed Description
The present application will be described in further detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
The embodiment of the application discloses a crankshaft transmission structure.
Referring to fig. 1 and 2, a crank driving structure includes a driving shaft 1, an eccentric shaft 2 and a connecting shaft 3 integrally formed, and a connecting rod assembly 4 slidably coupled in a compression groove of a cylinder unit of a compressor is installed on the connecting shaft 3. In the rotation hole where the drive shaft 1 is rotatably connected to the crank case 5, since there is a rotation relationship between the drive shaft 1 and the crank case 5, lubrication by a lubricating fluid is required in addition to the use of the rotation bearing to secure the rotation stability of the drive shaft 1.
Referring to fig. 2 and 3, a gap is provided between the inner side wall of the rotation hole of the crankcase 5 and the outer side wall of the driving shaft 1, and annular sealing gaskets 7 are installed on both ends of the driving shaft 1 in the gap in a sleeved manner to form a lubrication fluid cavity 8 in the rotation hole of the crankcase 5. The driving shaft 1 in the lubricating fluid cavity 8 is symmetrically provided with two-way threads 9. The crankcase 5 is provided with a first liquid port 10 corresponding to the lubricating liquid cavity 8 and two axial end parts along the driving shaft 1, and a second liquid port 11 is arranged at the joint of the crankcase 5 corresponding to the two-way screw 9. The first and second liquid ports 10 and 11 are connected to a lubricating liquid supply assembly, respectively, to realize a liquid path design of the lubricating liquid. The first liquid port 10 may be a liquid inlet, and the second liquid port 11 is a liquid outlet; or the first liquid port 10 can be a liquid outlet, and the second liquid port 11 is a liquid inlet; the whole direction of liquid inlet and liquid outlet is synchronous with the direction of pushing the lubricating liquid by the screw thread of the driving shaft 1, so that the flow and distribution uniformity of the lubricating liquid are accelerated by utilizing the bidirectional screw thread 9, and the lubricating effect is improved. In this embodiment, the lubrication fluid supply assembly is a lubrication fluid channel 6 provided on the inner wall of the crankcase 5, a sealing valve cover 18 is provided on the lubrication fluid channel 6, and the lubrication fluid is injected into the lubrication fluid channel 6 and is communicated with the first fluid port 10 and the second fluid port 11, so as to realize circulation of the lubrication fluid in the fluid path. The end of the crankcase 5 is fitted with a rolling bearing, not shown, outside the lubrication fluid chamber 8 to ensure rotational stability of the drive shaft 1.
Referring to fig. 4, 7 and 8, in the present embodiment, the bidirectional threads 9 may be provided as male threads or female threads, and the thread pitch may be equal to the width of the threads or greater than the width of the threads.
When the bi-directional thread 9 is provided as a male thread, the helical shape of the male thread is capable of pumping the lubricating fluid efficiently when it is rotated. As the screw thread rotates, the lubricating fluid is gradually pushed to the thread junction of the bi-directional screw thread 9 and is pushed to the second fluid port 11 during the rotation of the screw thread. This pumping action may promote circulation and distribution of the lubricating fluid in the lubricating-fluid chamber 8. If the male threads adopt the structural design with larger spacing, compared with the female threads with the same size, the female threads are beneficial to enlarging the containing space of the lubricating liquid, thereby improving the lubricating effect. The spiral shape of the female thread may also guide the flow direction of the lubricating liquid. The helical shape of the female thread may store a certain amount of lubricating fluid therein. Helping to ensure a continuous supply of lubricating fluid during rotation of the shaft to maintain a stable lubricating effect. By adopting the design of the concave thread, the gap of the lubricating liquid cavity 8 can be reduced, so that the leakage of the lubricating liquid can be reduced to a certain extent. The helical shape and close fit thereof effectively prevents the lubrication fluid from leaking out of the gap between the shaft and the threads.
There are several embodiments for the height or depth of the thread:
The male threads may be equal height threads; the female threads may be equal depth threads. Threads with equal height or depth are convenient to process, the flow rate of pumping lubricating liquid is basically unchanged, and the device is suitable for a lubricating structure of a transmission mechanism and needs the use working condition of pumping speed stability.
Or when the bidirectional screw 9 is provided as a male screw, the height of the male screw gradually decreases or gradually increases from the first liquid passage 10to the second liquid passage 11. Or when the bidirectional screw 9 is provided as a female screw, the depth of the female screw gradually decreases or gradually increases from the first liquid passage 10to the second liquid passage 11.
The flow rate of the lubricating fluid is regulated by the change of the thread depth. For example, when the driving shaft 1 rotates to push the lubricating fluid to rotate towards the middle part of the bidirectional thread 9, the depth of the concave thread gradually decreases from the two ends to the middle depth, and the volume of the lubricating fluid in the thread correspondingly decreases. Meaning that the amount of lubrication passing through the threads decreases during each revolution, thereby regulating the flow of lubrication. Meanwhile, when the depth of the concave thread is gradually reduced, the flow path of the lubricating liquid in the thread is shorter, and the flow resistance is correspondingly reduced, so that the lubricating liquid can reach the part to be lubricated more quickly, and the lubricating effect is improved. In addition, the shallower concave thread increases the contact area of the lubricating fluid with the surface of the drive shaft 1, thereby further improving the lubricating performance. As the depth of the female thread decreases, the clearance between the thread and the drive shaft 1 decreases accordingly, thereby helping to reduce the likelihood of lubricating fluid leaking out of the clearance between the thread and the shaft, maintaining efficient circulation and use of lubricating fluid within the lubricating fluid chamber 8. Furthermore, in some applications, it is desirable to tailor the depth of the female thread to specific lubrication requirements. For example, in some high speed rotation devices, shallower female threads are required to reduce leakage of lubrication fluid and friction losses. While in other applications where higher lubrication performance is required, deeper female threads are required to ensure adequate lubrication.
Referring to fig. 5 and 6, in order to further enhance the pumping effect on the lubricating fluid, the driving shaft 1 is located at a position where the lubricating fluid chamber 8 is close to the first fluid passage 10, and a plurality of arc-shaped grooves 12 are provided along the circumferential direction of the driving shaft 1. In the present embodiment, three centrally symmetrical arc-shaped grooves 12 are provided, and the circumferential opening degree of each arc-shaped groove 12 is 120 °. The depth of the arcuate slot 12 is varied in order to direct the flow of lubricating fluid into the gap in the lubricating fluid chamber 8; the bottom of the arc-shaped groove 12 is provided with an arc-shaped inclined surface, one side, close to the adjacent sealing gasket 7, of the bottom of the arc-shaped groove 12 is provided with a low end, and the side, close to the bidirectional threads 9, of the bottom of the arc-shaped groove 12 is provided with a high end, corresponding to the first liquid through hole 10. In the present embodiment, there are various extending directions of the arc-shaped groove 12, one extending in the axial direction of the drive shaft 1 and the other extending in the axial direction and the circumferential direction of the drive shaft 1, so that the arc-shaped groove 12 is spiral.
When the first liquid through port 10 is a liquid inlet, the arc-shaped groove 12 is used as a guiding buffer groove, so that the impact force generated by the flowing of the lubricating liquid into the lubricating liquid cavity 8 on the driving shaft 1 is reduced, and in the rotating process of the driving shaft 1, the arc-shaped groove 12 rotates along with the rotating process, and the side walls of the adjacent arc-shaped grooves 12 can be regarded as stirring blades, so that the driving shaft 1 can play a role of pumping pressure. The spiral extending arc is beneficial to increasing the pumping effect of the driving shaft 1 on the lubricating liquid, pushing the lubricating liquid to flow according to the set direction, and reducing the possibility of leakage of the lubricating liquid towards one side deviating from the pumping direction.
Referring to fig. 8 and 9, in order to further increase the pumping effect of the driving shaft 1 on the lubricating liquid, a telescopic slot 13 is provided at a position of the inner wall of the rotating hole of the crankcase 5, which is close to the arc slot 12, and an elastic telescopic abutting component is additionally provided in the telescopic slot 13. The elastic telescopic abutting component comprises an elastic piece 14 and an abutting piece 15, in the embodiment, the elastic piece 14 is provided as a spring, one end of the spring is fixedly connected into the telescopic groove 13, and the other end of the spring is fixedly connected to the abutting piece 15. The curved surface setting of arc wall 12 is laminated in the adaptation of butt spare 15, and the butt spare 15 is used for the position of butt arc wall 12 side wall all to be provided with the arc chamfer, so that follow the rotation of arc wall 12 and shrink the action, butt spare 15 is used for the butt to the inner wall of arc wall 12, and the spring is in compression state all the time. By means of the abutting piece 15 in the elastic telescopic abutting assembly, pushing of the lubricating liquid in the arc-shaped groove 12 is achieved, and the lubricating liquid is subjected to the inner wall of the arc-shaped groove 12 and synchronous pushing action of the abutting piece 15.
In order to improve the purity of the lubricating fluid, an annular filter gasket 16 is arranged at the position corresponding to the first fluid port 10 in a gap between the rotating hole and the driving shaft 1, and the filter gasket 16 is positioned between the arc-shaped groove 12 and the bidirectional threads 9. The filter gasket 16 is provided with the filter micropores 17 to filter impurities in the lubricating liquid or the impurities taken away by the lubricating liquid in the lubricating process, so that the purity of the lubricating liquid is improved, the abrasion between the impurities and the transmission structure is reduced, and the lubricating effect is improved.
The implementation principle of the crankshaft transmission structure of the embodiment of the application is as follows: based on the rotation of the driving shaft 1, the bidirectional threads 9 are utilized to push the lubricating liquid towards the second liquid through hole 11, so that the lubricating liquid can push and lubricate in a set path and rotating mode, the lubricating liquid moves through the parts of the lubricating liquid cavity 8 as much as possible, the generation of bubbles is reduced, and the lubricating effect is improved. According to the scheme, the structure between the crankshaft and the crank case 5 is improved, so that the lubrication liquid path is adjusted, the lubricating oil can be conveyed according to a set path, and therefore lubrication is carried out, the possibility of bubble generation is reduced, and the lubrication effect is improved; in addition, the driving shaft 1 can be reversely rotated, and the effect that the lubricating liquid is filled in the lubricating liquid cavity 8 by multiple areas can be achieved. In this scheme, for the mode of pumping the lubricating liquid among the prior art, utilize the rotation of drive shaft 1 can provide power for the flow of lubricating liquid, accelerate the flow of lubricating liquid, perhaps in the rotation in-process of drive shaft 1, do not need to set up the power pump alone and pump the lubricating liquid, utilize the rotation of drive shaft 1 to indirectly regard as the power supply to help reducing the energy consumption.
The embodiment of the application discloses a processing method of a crankshaft transmission structure, which comprises the following steps:
The crankshaft and the crank case 5 are semi-finely ground, redundant structures on the surface of the casting are removed by using equipment such as a lathe, a milling machine and the like, and the method is prepared for subsequent fine machining; the use of semi-finishing can quickly achieve a shape approaching the final size while ensuring a certain surface quality.
Finish grinding the crankshaft and crankcase 5; on the basis of semi-finish grinding, the dimensional accuracy and surface finish of the crankshaft and crankcase 5 are further improved. The method comprises the steps of finish milling, fine grinding and the like, and ensures the accuracy and surface quality of the characteristics of the outer diameter, the shaft shoulder and the like.
Finely boring a first liquid port 10, a second liquid port 11, an arc groove 12 and a bidirectional thread 9; and machining the crankshaft and the crank case 5 by adopting a fine boring device according to the set size specification. The precise positions and the sizes of the arc-shaped groove 12, the lubricating fluid cavity 8, the first fluid through hole 10 and the second fluid through hole 11 in the crank case 5 are ensured by processing equipment such as finish milling and fine grinding.
Deburring the refined crankshaft and the crankcase 5; deburring is to remove sharp edges and small pieces of metal that are created during machining to prevent scratching of other parts during assembly or use. Common deburring methods include mechanical deburring, chemical deburring, and the like.
Brushing the deburred crankshaft and the crankcase 5; brushing may further improve the surface quality of the crankshaft and crankcase 5, making it smoother. Is beneficial to reducing friction, improving wear resistance and enhancing the overall aesthetic degree of the product.
Cleaning the brushed crankshaft and the brushed crank case 5; thoroughly cleaning by using a cleaning agent or ultrasonic cleaning method and the like; can remove the impurities such as greasy dirt, metal filings and the like remained on the surfaces of the crankshaft and the crankcase 5 in the processing process.
The assembly process comprises the following steps:
The gasket 7 and the rotating bearing are fitted over the drive shaft 1, and then the drive shaft 1 is rotatably connected into the crankcase 5, ensuring that the gasket 7 is able to form an effective seal. The connecting rod assembly 4 is slidably coupled in the compression groove of the cylinder unit and assembled with the eccentric shaft 2 and the connecting shaft 3. The positions of all the assembly parts are ensured to be correct, the assembly is tight, and the clamping stagnation and the loosening phenomenon are avoided.
Mounting a filter gasket 16 to the first liquid port 10; the filter gasket 16 is required to be tightly matched with the liquid through hole during installation, so that liquid leakage is prevented. The filter gasket 16 is used for preventing impurities or metal particles from entering the liquid path and ensuring the normal operation of the transmission structure.
The gasket 7 is fitted over the drive shaft 1, and the drive shaft 1 is fitted into the crankcase 5. The purpose of the sealing gasket 7 is to prevent leakage of liquid or gas from the gap between the drive shaft 1 and the crankcase 5. During the installation process, it is necessary to ensure that the fitting accuracy and the installation order of the respective components are correct.
And the first liquid through port 10 and the second liquid through port 11 are respectively connected with the lubricating liquid supply assembly, so that the lubricating system can work normally.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (7)
1. The crankshaft transmission structure is characterized by comprising a driving shaft (1), an eccentric shaft (2) and a connecting shaft (3), wherein a connecting rod assembly (4) which is connected in a cylinder unit compression groove in a sliding way is arranged on the connecting shaft (3); the driving shaft (1) is rotationally connected to the crank case (5), a gap is arranged between the crank case (5) and the driving shaft (1), and sealing gaskets (7) are arranged at two ends of the driving shaft (1) positioned in the gap so as to form a lubricating fluid cavity (8); the driving shaft (1) positioned in the lubricating liquid cavity (8) is provided with a bidirectional thread (9), the end part of the crankcase (5) corresponding to the lubricating liquid cavity (8) is provided with a first liquid through port (10), and the junction of the crankcase (5) corresponding to the thread of the bidirectional thread (9) is provided with a second liquid through port (11); the first liquid port (10) and the second liquid port (11) are respectively connected to a lubricating liquid supply assembly; one end of the driving shaft (1) positioned in the lubricating liquid cavity (8) is provided with a plurality of arc grooves (12) along the circumferential direction of the driving shaft (1), and the arc grooves (12) are rotatably arranged at positions corresponding to the first liquid through holes (10); the bottom of the arc-shaped groove (12) is provided with an inclined surface, one side, close to the adjacent sealing gasket (7), of the bottom of the arc-shaped groove (12) is a low end, and corresponds to the first liquid through hole (10), and one side, close to the bidirectional thread (9), of the bottom of the arc-shaped groove (12) is a high end; the crankcase (5) is close to the inner wall of arc groove (12) is provided with flexible groove (13), be provided with flexible butt subassembly of elasticity in flexible groove (13), flexible butt subassembly of elasticity includes elastic component (14) and butt piece (15), elastic component (14) one end fixedly connected to in flexible groove (13), the other end fixedly connected to butt piece (15), butt piece (15) are used for the butt to the inner wall of arc groove (12).
2. Crank arrangement according to claim 1, characterized in that the arc-shaped groove (12) extends in the axial direction of the drive shaft (1).
3. Crank arrangement according to claim 1, characterized in that the arc-shaped groove (12) extends in the axial and circumferential direction of the drive shaft (1).
4. Crank drive structure according to claim 1, characterized in that a filter gasket (16) is arranged in the lubrication fluid chamber (8) corresponding to the first fluid port (10), and the filter gasket (16) is arranged between the arc-shaped groove (12) and the bidirectional screw thread (9).
5. Crank drive according to claim 1, characterized in that the bi-directional thread (9) is provided as a male or female thread, the thread pitch being equal to or larger than the width of the thread.
6. Crank arrangement according to claim 5, characterized in that the depth of the female thread (9) decreases or increases gradually from the first fluid port (10) to the second fluid port (11) when the female thread is provided; when the bidirectional screw thread (9) is set as a male screw thread, the height of the male screw thread gradually decreases or gradually increases from the first liquid through hole (10) to the second liquid through hole (11).
7. A method of manufacturing a crank drive structure based on a crank drive according to any one of claims 1-6, comprising the steps of:
Semi-finish grinding the crankshaft and crankcase (5);
finish grinding the crankshaft and crankcase (5);
finely boring a first liquid port (10), a second liquid port (11), an arc-shaped groove (12) and a bidirectional thread (9);
Deburring the refined crankshaft and the crankcase (5);
Brushing the deburred crankshaft and the crankcase (5);
cleaning the brushed crankshaft and the brushed crank case (5);
mounting a filter gasket (16) to the first liquid port (10);
the sealing gasket (7) is sleeved on the driving shaft (1), and the driving shaft (1) is installed in the crankcase (5).
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| CN202410249307.9A CN117847197B (en) | 2024-03-05 | 2024-03-05 | Crankshaft transmission structure and processing method |
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| CN202410249307.9A CN117847197B (en) | 2024-03-05 | 2024-03-05 | Crankshaft transmission structure and processing method |
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| CN117847197B true CN117847197B (en) | 2024-05-14 |
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| CN117847197A (en) | 2024-04-09 |
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