CN217271394U

CN217271394U - Diesel engine crankshaft

Info

Publication number: CN217271394U
Application number: CN202220208304.7U
Authority: CN
Inventors: 张爱东
Original assignee: Hangzhou Jiangbin Internal Combustion Engine Parts Co ltd
Current assignee: Hangzhou Jiangbin Internal Combustion Engine Parts Co ltd
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-08-23
Anticipated expiration: 2032-01-25

Abstract

The application discloses diesel engine crankshaft belongs to diesel engine accessory technical field, including the main shaft, a plurality of crank arms of the inner fixedly connected with of main shaft, two liang of a plurality of crank arms set up to a set of, through connecting rod journal fixed connection between two adjacent crank arms, the ring channel has all been seted up at the circumference wall middle part of a plurality of connecting rod journals, the activity ring has all been cup jointed in the inside of a plurality of ring channels that slides, form an annular chamber between the inner ring wall of a plurality of activity rings and the tank bottom portion of the ring channel that corresponds, a plurality of evenly distributed's circular slot has all been seted up to the left and right sides cell wall of a plurality of ring channels, the inside of a plurality of circular slots all is provided with the circular block. The buffer device can provide effective buffer for external force borne by the connecting rod journal in use, so that the connecting rod journal is not easy to break, and the service life is prolonged; the internal and external pressure difference of the annular cavity can be automatically balanced when the movable ring moves.

Description

Diesel engine crankshaft

Technical Field

The application relates to the technical field of diesel engine accessories, in particular to a diesel engine crankshaft.

Background

The crankshaft is the most important component in the engine. It receives the force from the connecting rod and converts it into torque to be output by crankshaft and drive other accessories on 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 enough strength and rigidity, and the surface of the journal needs to be wear-resistant, work uniformly and balance well;

general diesel engine crankshaft is because crank pin vertical fixation connects between two parallel crank arms, so concentrate on this junction internal stress, this part bears great external force in diesel engine working process, often can appear crackle and can produce the fracture even in this junction, generally take thickening crank arm or add the method of thick crankshaft diameter when solving the cracked problem of bent axle, this kind of structure is more consumptive material when production, make the bent axle comparatively heavy, reduce the flexibility of bent axle simultaneously, make crank pin fillet stress further increase, make the balance and the spatial arrangement of bent axle more difficult.

The existing diesel engine crankshaft is easy to crack when a connecting rod journal part bears large external force in use, and the crankshaft is easy to break due to the fact that stress directions are not consistent, so that the diesel engine crankshaft is provided.

SUMMERY OF THE UTILITY MODEL

The application provides a diesel engine crankshaft to the problem that the connecting rod journal part bears great external force and easily appears crackle in use that proposes among the above-mentioned background art, leads to the bent axle to take place fracture because of the atress direction is inconsistent easily simultaneously.

In order to achieve the purpose, the following technical scheme is adopted in the application:

the utility model provides a diesel engine crankshaft, includes the main shaft, a plurality of crank arms of the inner fixedly connected with of main shaft, it is a plurality of two liang of crank arms set up to a set of, adjacent two through connecting rod journal fixed connection, a plurality of the ring channel has all been seted up at the circumference wall middle part of connecting rod journal, and is a plurality of the equal slip of inside of ring channel has cup jointed the activity ring, and is a plurality of form an annular chamber between the inner ring wall of activity ring and the tank bottom portion of the ring channel that corresponds, and is a plurality of evenly distributed's circular slot is all seted up to the left and right sides cell wall of ring channel, and is a plurality of the inside of circular slot all is provided with the circular block, and is a plurality of the one end that the circular block deviates from mutually all extends to the outside of circular slot and with the rampart fixed connection of the activity ring that corresponds.

As a preferred embodiment, it is a plurality of evenly distributed's first draw-in groove has all been seted up to the interior rampart of activity ring, and is a plurality of the second draw-in groove has all been seted up with the position department of correspondence of a plurality of first draw-in grooves to the tank bottom of ring channel, and is a plurality of all be fixed with the spring between first draw-in groove and the second draw-in groove that corresponds, it is a plurality of the both ends of spring respectively with corresponding first draw-in groove and second draw-in groove looks joint.

As a preferable embodiment, a placing groove is formed in the middle of one end of each circular block, which is far away from the corresponding movable ring, a rolling ball is connected inside each placing groove in a sliding manner, and one end of each rolling ball extends to the outside of each placing groove and is connected with the bottom of each circular groove in a sliding manner.

In a preferred embodiment, a plurality of buffer sleeves are fixedly sleeved on the circumferential wall of each circular block.

In a preferred embodiment, each of the plurality of cushion sleeves is a corrosion-resistant rubber sleeve.

In a preferred embodiment, a plurality of the springs are all in a compressed state.

As a preferred embodiment, air guide holes are formed in positions corresponding to the positions of the left and right groove walls of the annular grooves and the annular cavity, and the other ends of the air guide holes are communicated with the positions, located on the two sides of the annular groove, of the circumferential wall of the connecting rod journal.

As a preferred embodiment, the inner edges of the openings of the plurality of air guide holes, which are far away from the corresponding springs, are fixedly connected with filter screens.

The beneficial effect of this application:

the crankshaft of the diesel engine is provided with the movable ring, the spring, the first clamping groove, the second clamping groove, the circular block and the circular groove, so that effective buffering can be provided for external force borne by the connecting rod journal in use, the connecting rod journal is not easy to break, and the service life is prolonged;

the crankshaft of the diesel engine can automatically balance the internal and external pressure difference of the annular cavity when the movable ring moves through the air guide hole and the filter screen.

Drawings

FIG. 1 is a schematic structural diagram of the present application;

FIG. 2 is a schematic view of the structure of the connecting rod journal and the movable ring of FIG. 1;

FIG. 3 is a side view of FIG. 2;

fig. 4 is an enlarged schematic view of a portion a of fig. 2.

Reference numbers in the figures: 1. a main shaft; 2. a connecting rod journal; 3. a crank arm; 4. a movable ring; 5. a ball bearing; 6. a circular block; 7. a buffer sleeve; 8. a spring; 9. a filter screen; 10. a gas-guide hole; 11. an annular cavity.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

Referring to fig. 1, a diesel engine crankshaft, including main shaft 1, a plurality of crank arms 3 of the inner fixedly connected with of main shaft 1, two liang of a plurality of crank arms 3 set up to a set of, through 2 fixed connection of connecting rod journal between two adjacent crank arms 3, the ring channel has all been seted up at the circumference wall middle part of a plurality of connecting rod journals 2, and the inside of a plurality of ring channels is all slided and is cup jointed movable ring 4.

Referring to fig. 3 and fig. 4, a plurality of evenly distributed's first draw-in groove has all been seted up to the interior rampart of a plurality of movable rings 4, the second draw-in groove has all been seted up with the position correspondence department of a plurality of first draw-in grooves to the tank bottom of a plurality of ring channels, all be fixed between a plurality of first draw-in grooves and the second draw-in groove that corresponds and be equipped with spring 8, a plurality of spring 8's both ends respectively with corresponding first draw-in groove and second draw-in groove looks joint, a plurality of spring 8 all are in compression state all the time, a plurality of spring 8 can provide elastic guard action power to connecting rod journal 2.

Referring to fig. 3 and 4, an annular cavity 11 is formed between the inner annular walls of the plurality of movable rings 4 and the bottoms of the corresponding annular grooves, a plurality of uniformly distributed circular grooves are formed in the left and right side groove walls of the plurality of annular grooves, and circular blocks 6 are arranged in the plurality of circular grooves. The ends of the circular blocks 6 which are far away from each other extend to the outside of the circular groove and are fixedly connected with the ring wall of the corresponding movable ring 4. The plurality of circular blocks 6 and the corresponding circular grooves are matched to provide limit for the movement of the movable ring 4. The circumference wall of a plurality of circular blocks 6 is all fixed to be cup jointed buffer sleeve 7, and buffer sleeve 7 can provide the buffering when the cell wall of circular block 6 and circular slot takes place to strike, and a plurality of buffer sleeves 7 are corrosion-resistant rubber cover, and corrosion-resistant rubber cover's long service life is difficult for receiving the corruption.

Referring to fig. 3 and 4, the placing groove has all been seted up at the one end middle part that corresponding activity ring 4 was kept away from to a plurality of circular lumps 6, and the equal sliding connection in inside of a plurality of placing grooves has ball 5, and the one end of a plurality of ball 5 all extends to the outside of placing groove and with the tank bottom sliding connection of circular slot. The balls 5 reduce the friction between the circular block 6 and the walls of the groove.

Referring to fig. 2 and 4, air vents 10 are respectively formed at positions corresponding to the left and right side groove walls of the plurality of annular grooves and the annular cavity, and the other ends of the plurality of air vents 10 are respectively communicated with the circumferential wall of the connecting rod journal 2 at two sides of the annular groove. The air-guide holes 10 can adjust the pressure difference between the inside and the outside of the annular cavity 11 when the movable ring 4 moves. The inner edges of the openings of the air guide holes 10 far away from the corresponding springs 8 are fixedly connected with filter screens 9. The filter screen 9 can prevent impurities from entering the air guide hole 10.

The working principle is as follows: when the connecting rod journal 2 rotates on the crankshaft, the connecting rod journal 2 drives the piston to rotate, the pressure of the piston on the connecting rod journal 2 extrudes the spring 8 through the movable ring 4, part of the pressure of the piston is converted into elastic potential energy of the spring 8, the circular groove can limit the circular block 6 and further limit the movable ring 4, and the application can effectively buffer external force borne by the connecting rod journal 2 in use, so that the connecting rod journal 2 is not easy to break, and the service life is prolonged; the internal and external pressure difference of the annular cavity 11 can be automatically balanced when the movable ring 4 moves.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The above description is only for the preferred embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art should be considered to be within the scope of the present application, and all equivalent substitutions and changes according to the technical solutions and the inventive concepts of the present application should be covered by the scope of the present application.

Claims

1. The utility model provides a diesel engine crankshaft, includes main shaft (1), its characterized in that, a plurality of crank arms (3) of the inner fixedly connected with of main shaft (1), it is a plurality of crank arm (3) two liang set up to a set of, adjacent two through connecting rod journal (2) fixed connection, a plurality of the ring channel has all been seted up at the circumference wall middle part of connecting rod journal (2), and is a plurality of activity ring (4) have all been cup jointed in the equal slip in inside of ring channel, and are a plurality of form an annular chamber (11) between the tank bottom portion of the interior rampart of activity ring (4) and the ring channel that corresponds, and is a plurality of evenly distributed's circular slot has all been seted up to the left and right sides cell wall of ring channel, and is a plurality of the inside of circular slot all is provided with circular block (6), and is a plurality of the one end that circular block (6) deviate from mutually all extends to the outside of circular slot and the rampart fixed connection of the rampart of activity ring (4) with corresponding.

2. The diesel engine crankshaft according to claim 1, wherein a plurality of first clamping grooves are uniformly formed in the inner annular wall of each of the movable rings (4), a plurality of second clamping grooves are formed in positions corresponding to the first clamping grooves at the bottoms of the annular grooves, springs (8) are fixedly arranged between the first clamping grooves and the corresponding second clamping grooves, and two ends of each of the springs (8) are respectively clamped with the corresponding first clamping grooves and the corresponding second clamping grooves.

3. The crankshaft of the diesel engine according to claim 1, characterized in that a placing groove is opened in the middle of one end of each circular block (6) far away from the corresponding movable ring (4), a rolling ball (5) is slidably connected inside each placing groove, and one end of each rolling ball (5) extends to the outside of each placing groove and is slidably connected with the bottom of each circular groove.

4. The diesel engine crankshaft according to claim 1, characterized in that the circumferential walls of the round blocks (6) are fixedly sleeved with buffer sleeves (7).

5. A diesel engine crankshaft according to claim 4, characterized in that a plurality of said cushion sleeves (7) are made of corrosion-resistant rubber.

6. A diesel engine crankshaft according to claim 2, characterized in that a plurality of said springs (8) are in compression at all times.

7. The crankshaft of the diesel engine according to claim 1, wherein air holes (10) are formed in the positions corresponding to the positions of the left and right side groove walls of the annular grooves and the annular grooves, and the other ends of the air holes (10) are communicated with the circumferential wall of the connecting rod journal (2) at the two sides of the annular groove.

8. The crankshaft of the diesel engine as claimed in claim 7, wherein the inner edges of the openings of the plurality of air guide holes (10) far away from the corresponding springs (8) are fixedly connected with filter screens (9).