CN111350751A

CN111350751A - Sectional type nodular cast iron crankshaft

Info

Publication number: CN111350751A
Application number: CN202010169069.2A
Authority: CN
Inventors: 周秉文; 程新民; 戴文尧
Original assignee: Jiangsu Songlin Automobile Parts Co ltd
Current assignee: Jiangsu Songlin Automobile Parts Co ltd
Priority date: 2020-03-12
Filing date: 2020-03-12
Publication date: 2020-06-30

Abstract

The invention discloses a sectional nodular cast iron crankshaft, which comprises a crankshaft main body and a flywheel, wherein one end of the crankshaft main body is integrally connected with an output shaft, the output shaft is sleeved with a connecting disc, the side wall of the output shaft is integrally and symmetrically provided with clamping blocks, the clamping blocks are symmetrically provided with first square grooves, one end of each first square groove is provided with a second square groove, one side of each second square groove is provided with a first placing groove, the first square grooves are inserted with first inserting blocks, the second square grooves are inserted with second inserting blocks, and the first placing grooves are integrally formed with first extrusion springs The maintenance brings convenience to the working personnel, improves the working efficiency and ensures the normal use of the crankshaft.

Description

Sectional type nodular cast iron crankshaft

Technical Field

The invention relates to the technical field of crankshafts, in particular to a sectional type nodular cast iron crankshaft.

Background

The nodular cast iron crankshaft is one of the nodular cast iron crankshafts which is widely applied in production, and compared with the traditional forged steel crankshaft, the nodular cast iron crankshaft has the advantages of simple and convenient manufacture and low cost, has the excellent characteristics of shock absorption, wear resistance, insensitivity to surface nick and the like which are not possessed by forged steel materials. The ductile iron has good matching property with bearing bushes made of babbitt metal, lead bronze and steel-backed aluminum alloy, the graphite has the functions of lubricating and storing lubricating oil, and the wear resistance of the graphite is better than that of steel; the impact resistance of the nodular cast iron is superior to that of steel under the condition of bearing small-energy multiple impact loads; the fatigue strength of the nodular cast iron crankshaft in the torsional and bending fatigue stress states can reach or even exceed that of a forged steel crankshaft through alloying, reasonable spheroidization, inoculation and the like.

At present, a flywheel is connected to the power output end of a nodular cast iron crankshaft, namely one end of a transmission connecting box and one end of a work doing device, the flywheel mainly serves to store energy and inertia outside the work doing stroke of an engine, and the output end of the crankshaft is usually connected with the flywheel in a screw fastening mode.

Disclosure of Invention

The invention aims to provide a sectional type nodular cast iron crankshaft to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a sectional type nodular cast iron crankshaft comprises a crankshaft main body and a flywheel, wherein an output shaft is integrally formed and connected at one end of the crankshaft main body, and a connecting disc is sleeved on the output shaft;

the side wall of the output shaft is symmetrically provided with clamping blocks in an integrated manner, the clamping blocks are symmetrically provided with first square grooves in the clamping blocks, one end of each first square groove is provided with a second square groove, one side of each second square groove is provided with a first placing groove, the first square grooves are provided with first inserting blocks in an inserting manner, the second square grooves are provided with second inserting blocks in an inserting manner, and the first placing grooves are internally provided with first extrusion springs in an integrated manner;

the second insert block is integrally formed at one end of the first insert block, the first insert block is integrally formed at the same end as the second insert block and is provided with a first return spring, the other end of the first return spring is integrally formed and connected in a first square groove, and the other end of the first insert block is provided with a first slope;

the other end of the first extrusion spring is integrally connected with a first extrusion block, the first extrusion block is slidably connected and arranged in the first placing groove, and a second slope is arranged at the other end of the first extrusion block;

the flywheel is provided with a circular through groove in the center in a penetrating manner, clamping grooves are symmetrically formed in the side sides of the circular through groove, clamping blocks are clamped in the clamping grooves, and square through grooves are symmetrically formed in the flywheel;

and locking structures are symmetrically arranged on the same side of the flywheel.

Preferably, the locking structure includes a fixing block, a third insert block, a fourth insert block, a second return spring, a second extruding spring, a clamping column, a slot, a limiting groove, a first extruding column, a second extruding column, a limiting ring, a connecting block, a fixed square groove, a third extruding spring, a second extruding block, a fourth extruding spring and a third extruding block, the fixing block is symmetrically arranged at the same side of the flywheel in an integrated manner, one end of the fixing block, in which the third square groove and the third square groove are arranged, is provided with a fourth square groove, the other end of the fourth square groove is provided with a slot, the lateral side of the third square groove is provided with a first circular groove, the third insert block is inserted in the third square groove, the fourth insert block is inserted in the fourth square groove, the first extruding column is inserted in the first circular groove, the fourth insert block is integrally formed at one end of the third insert block, the third insert block is integrally formed at the same end of the fourth insert block, and is provided with the second return spring, The second reset spring is integrally formed and connected with the other end of the second reset spring in a third square groove, a second accommodating groove is formed in the third insert block, a second extrusion spring is integrally formed and connected with a second extrusion spring in the second accommodating groove, a clamping column is slidably connected with the second extrusion spring in the second accommodating groove, the first extrusion column is integrally formed and arranged at one end of the second extrusion column, the second extrusion column is inserted and arranged in the second circular groove, the second circular groove is arranged at one end of the first circular groove, a limiting groove is formed in the second circular groove, a limiting ring is integrally formed and arranged at one end of the first extrusion column, the limiting ring is slidably connected in the limiting groove, a connecting block is inserted and arranged in the slot, a fixed square groove is formed at one side of the connecting block, a third accommodating groove is formed in the fixed square groove, and a third extrusion spring is integrally formed and arranged in the third accommodating groove, The third extrusion spring other end integrated into one piece connects and is provided with the second extrusion piece, the second extrusion piece sliding connection sets up in the third standing groove to the other end of second extrusion piece is provided with the third slope, the connecting block is provided with the fourth extrusion spring in the integrated into one piece equidistance with fixed square groove in being provided with fourth standing groove, the fourth extrusion spring other end integrated into one piece connects and is provided with the third extrusion piece, third extrusion piece sliding connection sets up in the fourth standing groove to the other end of third extrusion piece is provided with the fourth slope.

Preferably, the first extrusion column and the clamping column are arranged at corresponding positions, are arranged in the same number of groups, and have the same diameter, that is, when the clamping column reaches the position of the first extrusion column, the central lines of the first extrusion column and the clamping column are on the same straight line.

Preferably, the diameter of the limiting groove is larger than the diameter of the second circular groove and the outer diameter of the limiting ring at equal intervals, and the length of the limiting groove is equal to that of the clamping column.

Preferably, the connecting blocks correspond to the square through grooves in arrangement position and are arranged in the same number, and the length of the connecting blocks is greater than that of the square through grooves.

Preferably, the clamping grooves correspond to the clamping blocks in arrangement position and are arranged in the same number, and the cross section shapes of the notches of the clamping grooves are the same as that of the clamping blocks.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the crankshaft and the flywheel are fixedly connected, so that on one hand, better stability and firmness can be realized, and further, the normal output of output power is ensured, and the normal operation of the crankshaft is ensured, on the other hand, the crankshaft and the flywheel are conveniently connected and fixed, convenience is brought to workers for later detection and maintenance, the working efficiency is improved, and the normal use of the crankshaft is ensured.

Drawings

FIG. 1 is a right side schematic view of a connection structure according to the present invention;

FIG. 2 is a left side schematic view of the connection structure of the present invention;

FIG. 3 is a schematic exploded left side view of the connection structure of the present invention;

FIG. 4 is an exploded right side schematic view of the connection structure of the present invention;

FIG. 5 is a schematic view of the connection structure of the output shaft and the connecting disc of the present invention;

FIG. 6 is an enlarged view of a portion of the connection structure of FIG. 5 according to the present invention;

fig. 7 is a partial cross-sectional view of the locking structure of the present invention.

In the figure: the connecting structure comprises a crankshaft body 1, a flywheel 2, an output shaft 3, a connecting disc 4, a clamping block 5, a first inserting block 6, a second inserting block 7, a first return spring 8, a first extrusion spring 9, a first extrusion block 10, a circular through groove 11, a clamping groove 12, a square through groove 13, a locking structure 14, a fixing block 1401, a second inserting block 1402, a third inserting block 1403, a second return spring 1404, a second extrusion spring 1405, a clamping column 1406, a slot 1407, a limiting groove 1408, a first extrusion column 1409, a second extrusion column 1410, a limiting ring 1411, a connecting block 1412, a fixing square groove 1413, a third extrusion spring 1414, a second extrusion block 1415, a fourth extrusion spring 6 and a third extrusion block 1417.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below. The embodiments of the present invention, and all other embodiments obtained by a person of ordinary skill in the art without any inventive work, belong to the scope of protection of the present invention.

Referring to fig. 1 to 7, the present invention provides a technical solution: the invention relates to a sectional nodular cast iron crankshaft, which comprises a crankshaft main body 1 and a flywheel 2, wherein one end of the crankshaft main body 1 is integrally connected with an output shaft 3, and a connecting disc 4 is sleeved on the output shaft 3;

the side wall of the output shaft 3 is symmetrically provided with a fixture block 5 in an integrated manner, the fixture block 5 is symmetrically provided with a first square groove, one end of the first square groove is provided with a second square groove, one side of the second square groove is provided with a first placing groove, the first square groove is provided with a first inserting block 6 in an inserting manner, the second square groove is provided with a second inserting block 7 in an inserting manner, and the first placing groove is internally provided with a first extrusion spring 9 in an integrated manner;

the second insert block 7 is integrally formed at one end of the first insert block 6, the first insert block 6 is integrally formed with a first return spring 8 at the same end as the second insert block 7, the other end of the first return spring 8 is integrally formed and connected in a first square groove, and a first slope is arranged at the other end of the first insert block 6;

the other end of the first extrusion spring 9 is integrally connected with a first extrusion block 10, the first extrusion block 10 is slidably connected and arranged in the first placing groove, and a second slope is arranged at the other end of the first extrusion block 10;

a circular through groove 11 is formed in the center of the flywheel 2 in a penetrating mode, clamping grooves 12 are symmetrically formed in the side sides of the circular through groove 11, clamping blocks 5 are clamped in the clamping grooves 12, and square through grooves 13 are symmetrically formed in the flywheel 2;

the locking structures 14 are symmetrically arranged on the same side of the flywheel 2.

Further, the locking structure 14 includes a fixed block 1401, a third insertion block 1402, a fourth insertion block 1403, a second return spring 1404, a second pressing spring 1405, a clamping column 1406, an insertion groove 1407, a limiting groove 1408, a first pressing column 1409, a second pressing column 1410, a limiting ring 1411, a connecting block 1412, a fixed square groove 1413, a third pressing spring 1414, a second pressing block 1415, a fourth pressing spring 1416, and a third pressing block 1417, the fixed block 1401 is integrally formed and symmetrically disposed on the same side of the flywheel 2, the fixed block 1401 is provided with a third square groove, one end of the third square groove is provided with a fourth square groove, the other end of the fourth square groove is provided with an insertion groove 1407, the side of the third square groove is provided with a first circular groove, the third insertion block 1402 is inserted into the third square groove, the fourth insertion block 1403 is inserted into the fourth groove, the first pressing column 1409 is inserted into the first circular groove, the fourth insertion block 1403 is integrally formed at one end of the third insertion block 1402, a second return spring 1404 is integrally formed at the same end of the third insert block 1402 as the fourth insert block 1403, the other end of the second return spring 1404 is integrally formed and connected in a third square groove, a second placing groove is formed in the third insert block 1402, a second extrusion spring 1405 is integrally formed in the second placing groove, the other end of the second extrusion spring 1405 is integrally formed and connected with a clamp column 1406, the clamp column 1406 is slidably connected and arranged in the second placing groove, a first extrusion column 1409 is integrally formed at one end of a second extrusion column 1410, the second extrusion column 1409 is inserted and arranged in a second circular groove, the second circular groove is arranged at one end of the first circular groove, a limit groove 1408 is arranged in the second circular groove, a limit ring 1411 is integrally formed at one end of the first extrusion column 1409, the limit ring 1411 is slidably connected in the limit groove 1408, a connecting block 1412 is inserted and arranged at one side of the connecting block 1412, a third placing groove is formed in the fixed square groove 1413, a third extrusion spring 1414 is integrally formed in the third placing groove, a second extrusion block 1415 is integrally formed and connected at the other end of the third extrusion spring 1414, the second extrusion block 1415 is slidably connected and arranged in the third placing groove, a third slope is formed at the other end of the second extrusion block 1415, a fourth placing groove is formed in the same side of the connecting block 1412 with the fixed square groove 1413, a fourth extrusion spring 1416 is integrally formed and arranged in the fourth placing groove at equal intervals, a third extrusion block 1417 is integrally formed and connected at the other end of the fourth extrusion spring 1416, a third extrusion block 1417 is slidably connected and arranged in the fourth placing groove, and a fourth slope is formed at the other end of the third extrusion block 1417.

Further, the first pressing column 1409 and the card column 1406 are arranged at corresponding positions, the number of the arranged groups is the same, and the diameters of the two are the same, that is, when the card column 1406 reaches the position of the first pressing column 1409, the central lines of the two are on the same straight line.

Further, the diameter of the limit groove 1408 is larger than the diameter of the second circular groove, the outer diameter of the equidistant limit ring 1411, and the length of the limit groove 1408 is equal to the length of the catch 1406.

Further, the connecting block 1412 corresponds to the arrangement position of the square through grooves 13 and has the same number of groups, and the length of the connecting block 1412 is greater than that of the square through grooves 13.

Furthermore, the arrangement positions of the clamping grooves 12 and the clamping blocks 5 correspond to each other, the arrangement numbers are the same, and the cross-sectional shapes of the notches of the clamping grooves 12 are the same as the cross-sectional shapes of the clamping blocks 5.

The working state is as follows: in the invention, when the output shaft 3 on the output end of the crankshaft main body 1 is installed and connected with the flywheel 2, the clamping block 5 on the output shaft 3 is clamped in the clamping groove 12 in the flywheel 2, the connecting block 1412 is inserted in the square through groove 13, in the process that the clamping block 5 is clamped in the clamping groove 12, the first inserting block 6 is extruded to push the second inserting block 7 to move, the second inserting block 7 extrudes the first extruding block 10 to enable the first extruding spring 9 to be in an extruding state, so that the clamping connection between the clamping block 5 and the clamping groove 12 is firmer and more stable, when the connecting block 1412 is inserted in the square through groove 13, the connecting block 1412 passes through the square through groove 13 to be inserted in the inserting groove 1407, in the process that the connecting block 1412 is inserted in the square through groove 13, the third extruding block 1417 is extruded to enable the fourth extruding spring 1416 to be in an extruding state, so that the connecting block 1412 is inserted in the square through groove 13 more tightly, further, the connection and fixation stability is improved, when the connection block 1412 is inserted into the insertion groove 1407, the third insertion block 1402 is pressed, the third insertion block 1402 pushes the fourth insertion block 1403 to enter the fixed square groove 1413, in the process, the third insertion block 1402 extrudes the second extrusion block 1415, the third extrusion spring 1414 is in an extrusion state, the insertion of the connection block 1412 and the insertion groove 1407 is firmer, and when the clamp column 1406 on the third insertion block 1402 reaches the first round groove position, the clamp column 1406 is inserted and fixed in the first round groove under the action of the second extrusion spring 1405, and the fourth insertion block 1403 can be fixed in the fixed square groove 1413, so that the installation and fixation of the crankshaft main body 1 and the flywheel 2 are realized, the connection and fixation stability are good, on the other hand, when detection and maintenance are needed, only the second extrusion column 1410 is pressed, the first extrusion column 1409 is pushed to extrude the clamp column 1406 from the first round groove, the fourth insert 1403 is separated from the fixed square groove 1413 under the action of the second return spring 1404 and returns to the fourth square groove, and further the fixation of the flywheel of the crankshaft main body 1 can be quickly released, which is very convenient, therefore, the crankshaft and the flywheel 2 are fixedly connected through the invention, on one hand, better stability and firmness can be realized, further, the normal output of output power is ensured, and the normal operation of the crankshaft is ensured, on the other hand, the crankshaft and the flywheel 2 are more conveniently connected and fixed, which brings convenience to workers for later detection and maintenance, improves the working efficiency, and ensures the normal use of the crankshaft.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a sectional type nodular cast iron bent axle which characterized in that: the flywheel crankshaft comprises a crankshaft main body (1) and a flywheel (2), wherein an output shaft (3) is integrally formed and connected at one end of the crankshaft main body (1), and a connecting disc (4) is sleeved on the output shaft (3);

the side wall of the output shaft (3) is symmetrically provided with clamping blocks (5) in an integrated manner, the clamping blocks (5) are symmetrically provided with first square grooves, one end of each first square groove is provided with a second square groove, one side of each second square groove is provided with a first placing groove, the first square grooves are provided with first inserting blocks (6) in an inserted manner, the second square grooves are provided with second inserting blocks (7) in an inserted manner, and the first placing grooves are internally provided with first extrusion springs (9) in an integrated manner;

the second insert block (7) is integrally formed at one end of the first insert block (6), the first insert block (6) is integrally formed at the same end of the second insert block (7) with a first return spring (8), the other end of the first return spring (8) is integrally formed and connected in a first square groove, and a first slope is arranged at the other end of the first insert block (6);

the other end of the first extrusion spring (9) is integrally formed and connected with a first extrusion block (10), the first extrusion block (10) is slidably connected and arranged in the first placing groove, and a second slope is arranged at the other end of the first extrusion block (10);

a circular through groove (11) is arranged in the center of the flywheel (2) in a penetrating mode, clamping grooves (12) are symmetrically formed in the edge sides of the circular through groove (11), clamping blocks (5) are clamped in the clamping grooves (12), and square through grooves (13) are symmetrically formed in the flywheel (2);

the locking structures (14) are symmetrically arranged on the same side of the flywheel (2).

2. The segmented ductile iron crankshaft according to claim 1, wherein: the locking structure (14) comprises a fixing block (1401), a third inserting block (1402), a fourth inserting block (1403), a second reset spring (1404), a second extrusion spring (1405), a clamping column (1406), an inserting groove (1407), a limiting groove (1408), a first extrusion column (1409), a second extrusion column (1410), a limiting ring (1411), a connecting block (1412), a fixed square groove (1413), a third extrusion spring (1414), a second extrusion block (1415), a fourth extrusion spring (1416) and a third extrusion block (1417), wherein the fixing block (1401) is symmetrically arranged on the same side of the flywheel (2) in an integrated manner, the fixing block (1401) is provided with a third square groove, one end of the third square groove is provided with the fourth square groove, the other end of the fourth square groove is provided with the inserting groove (1407), the side of the third square groove is provided with a first circular groove, and the third inserting block (1402) and the fourth square groove are inserted in the third inserting block (1402), A fourth plug block (1403) is plugged in the fourth groove, a first extrusion column (1409) is plugged in the first circular groove, the fourth plug block (1403) is integrally formed and arranged at one end of the third plug block (1402), the third plug block (1402) is integrally formed and arranged with a second reset spring (1404) and the same end as the fourth plug block (1403) and is integrally formed and arranged in a third square groove, a second placing groove is arranged in the third plug block (1402), a second extrusion spring (1405) is integrally formed and arranged in the second placing groove, a clamping column (1406) is integrally formed and arranged at the other end of the second extrusion spring (1405), the clamping column (1406) is slidably arranged in the second placing groove, the first extrusion column (1409) is integrally formed and arranged at one end of the second extrusion column (1410), the second extrusion column (1410) is plugged and arranged in the second circular groove, The second circular groove is arranged at one end of the first circular groove, a limiting groove (1408) is arranged in the second circular groove, the second extrusion column (1410) is provided with a limiting ring (1411) in an integrated manner with one end of the first extrusion column (1409), the limiting ring (1411) is connected in the limiting groove (1408) in a sliding manner, the slot (1407) is connected with a connecting block (1412) in an inserting manner, one side of the connecting block (1412) is provided with a fixed square groove (1413), the fixed square groove (1413) is provided with a third placing groove, the third placing groove is provided with a third extrusion spring (1414) in an integrated manner, the other end of the third extrusion spring (1414) is connected with a second extrusion block (5) in an integrated manner, the second extrusion block (1415) is arranged in a sliding manner in the third placing groove, the other end of the second extrusion block (1415) is provided with a third slope, and the connecting block (1412) is provided with a fourth placing groove in the same side of the fixed square groove (1413), A fourth extrusion spring (1416) is arranged in the fourth placing groove in an integrally-formed and equidistant mode, a third extrusion block (1417) is arranged at the other end of the fourth extrusion spring (1416) in an integrally-formed and connected mode, the third extrusion block (1417) is arranged in the fourth placing groove in a sliding connection mode, and a fourth slope is arranged at the other end of the third extrusion block (1417).

3. The segmented ductile iron crankshaft according to claim 2, wherein: the first squeezing column (1409) and the clamping column (1406) are arranged at corresponding positions, the number of the arranged groups is the same, and the diameters of the two squeezing columns are the same, namely when the clamping column (1406) reaches the position of the first squeezing column (1409), the central lines of the two squeezing columns are on the same straight line.

4. The segmented ductile iron crankshaft according to claim 2, wherein: the diameter of the limiting groove (1408) is larger than the diameter of the second circular groove and the outer diameter of the equidistant limiting ring (1411), and the length of the limiting groove (1408) is equal to that of the clamping column (1406).

5. The segmented ductile iron crankshaft according to claim 2, wherein: the connecting blocks (1412) are corresponding to the square through grooves (13) in arrangement positions and are arranged in the same number, and the length of the connecting blocks (1412) is larger than that of the square through grooves (13).

6. The segmented ductile iron crankshaft according to claim 1, wherein: the clamping grooves (12) correspond to the clamping blocks (5) in arrangement position and are arranged in the same number, and the cross section of the groove openings of the clamping grooves (12) is the same as that of the clamping blocks (5).