Crankshaft structure

Abstract

The utility model belongs to the technical field of crankshafts, and particularly relates to a crankshaft structure which comprises a crank end, one end of the crank end is fixedly connected with a cam shaft transmission chain wheel installation shaft, and a key groove is formed in the outer surface of the cam shaft transmission chain wheel installation shaft. A first main bearing journal is fixedly mounted at the other end of the camshaft transmission chain wheel mounting shaft, a main journal oil way is formed in the first main bearing journal, a balance block is fixedly mounted at the other end of the first main bearing journal, and a crank pin journal is fixedly connected to the outer surface of the balance block. By means of the groove formed in the main journal, when the main journal and the crankshaft tile are matched with each other, the lubricating effect is better, the service life is prolonged, by means of the special balance block shape, the size of the flywheel is reduced, meanwhile, the performance of the flywheel is better, by means of the flange plate, the flywheel is more convenient to install, and operation is more stable after installation; and through the special design of the crank, the machining difficulty is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of crankshafts, and in particular relates to a crankshaft structure. Background Art

[0002] The crankshaft is a core component in an internal combustion engine. It undertakes the important task of converting the reciprocating linear motion of the piston into the rotational motion of the crankshaft, thereby driving other parts of the engine. It has the functions of power conversion and driving accessories, and has good bending and torsional resistance and wear resistance. Although main bearings with better performance are used at this stage, there is still a problem of wear caused by too small an amount of oil stored. Utility Model Content

[0003] In order to solve the problems raised in the above background technology, the utility model provides a crankshaft structure, which solves the problem of wear caused by too little oil storage even though the main bearing with better performance is used at the current stage.

[0004] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a crankshaft structure, comprising a crank end head, one end of the crank end head is fixedly connected to a camshaft drive sprocket mounting shaft, a keyway is provided on the outer surface of the camshaft drive sprocket mounting shaft, a first main bearing journal is fixedly installed on the other end of the camshaft drive sprocket mounting shaft, a main journal oil circuit is provided inside the first main bearing journal, a balancing block is fixedly installed on the other end of the first main bearing journal, a crank pin journal is fixedly connected to the outer surface of the balancing block, a crank pin oil hole is provided inside the crank pin journal, a crank is fixedly installed on the other end of the crank pin journal, a second main bearing journal is fixedly connected to the outer surface of the balancing block, and a flange is fixedly connected to the other end of the second main bearing journal.

[0005] Preferably, the number of the balancing weights is two groups, with two weights in each group, and each group is symmetrically arranged.

[0006] Preferably, a groove is formed around the outer surface of the main journal.

[0007] Preferably, the balancing block is fixedly connected to the crank via a crank pin journal.

[0008] Preferably, the two balancing blocks and the two cranks are fixedly connected by main journals.

[0009] Preferably, the two balancing weights in each group of balancing weights are in opposite directions.

[0010] Preferably, a keyway is provided on the outer surface of the crank end.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The crankshaft structure has a groove on the main journal, which makes the main journal and the crankshaft bush cooperate with each other, and its lubrication effect is better, which prolongs the service life. The special shape of the balance block reduces its volume and makes its performance more superior. The setting of the flange makes the installation of the flywheel more convenient and the operation is more stable after installation. The special design of the crank reduces the processing difficulty.

[0013] 2. The crankshaft structure, through the setting of the keyway on the outer surface of the crank end and the camshaft drive sprocket mounting shaft, makes the installation faster, more accurate and more precise. Through the setting of the main journal oil passage and the latch neck oil passage, the oil storage effect is better and the friction is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention, and together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation on the present invention. In the drawings:

[0015] Figure 1 It is a complete structural schematic diagram of the utility model;

[0016] Figure 2 This is a front view structural diagram of the utility model;

[0017] Figure 3 For the utility model Figure 2 Enlarged view of point A in the middle.

[0018] In the figure: 1. Crank end; 2. Camshaft drive sprocket mounting shaft; 3. First main bearing journal; 4. Main journal oil passage; 5. Keyway; 6. Balance block; 7. Main journal; 8. Crank; 9. Crank pin journal; 10. Crank pin oil hole; 11. Flange; 12. Second main bearing journal. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-3The utility model provides the following technical solutions: a crankshaft structure, including a crank end 1, one end of the crank end 1 is fixedly connected to a camshaft drive sprocket mounting shaft 2, the outer surface of the camshaft drive sprocket mounting shaft 2 is provided with a keyway 5, the other end of the camshaft drive sprocket mounting shaft 2 is fixedly installed with a first main bearing journal 3, the interior of the first main bearing journal 3 is provided with a main journal oil passage 4, the other end of the first main bearing journal 3 is fixedly installed with a balancing block 6, the outer surface of the balancing block 6 is fixedly connected to a crank pin journal 9, the interior of the crank pin journal 9 is provided with a crank pin oil hole 10, the other end of the crank pin journal 9 is fixedly installed with a crank 8, the outer surface of the balancing block 6 is fixedly connected to a second main bearing journal 12, and the other end of the second main bearing journal 12 is fixedly connected with a flange 11.

[0021] In this embodiment, the groove opened on the main journal 7 makes the lubrication effect better when the main journal 7 and the crankshaft bush cooperate with each other, thereby extending the service life. The special shape of the balancing block 6 reduces its volume while making its performance more superior. The setting of the flange 11 makes the installation of the flywheel more convenient and the operation more stable after installation. The special design of the crank 8 reduces the processing difficulty. The setting of the keyway 5 on the outer surface of the crank end 1 and the camshaft drive sprocket mounting shaft 2 makes the installation faster, more accurate and more precise. The setting of the main journal oil channel 3 and the pin neck oil channel 10 makes the oil storage effect better and reduces friction.

[0022] Specifically, the number of the balancing weights 6 is two groups, each group has two, and each group is symmetrically arranged. The symmetrical arrangement can reduce the vibration generated during operation.

[0023] Specifically, the outer surface of the main journal 7 is surrounded by grooves, and the oil storage capacity is improved and the friction is reduced by the arrangement of the grooves.

[0024] Specifically, the balancing block 6 and the crank 8 are fixedly connected via the crank pin journal 9. The connection of the crank pin journal 9 improves the performance of the device during operation.

[0025] Specifically, the two balancing blocks 6 and the two cranks 8 are fixedly connected by a main journal 7, and the connection of the main journal 7 makes the operation of the equipment more stable.

[0026] Specifically, the two balancing masses 6 in each group of balancing masses 6 are arranged in opposite directions and in opposite ways, so that the stability and durability during operation are improved.

[0027] Specifically, a keyway 5 is provided on the outer surface of the crank end 1. The keyway 5 makes it more convenient and quick to install related equipment.

[0028] The working principle or use process of the utility model is as follows: first, fix the crankshaft stud at the preset position of the engine, then install the crankshaft bushing, put the crankshaft in place, make the main journal 7 of the crankshaft fit each crankshaft bushing, then install another crankshaft bushing, fix the crankshaft with the main bearing cap, install the main thrust gasket, install the flywheel on the surface of the flange, set the sprocket on the outer surface of the camshaft drive sprocket mounting shaft 2, and set the pulley or shock absorber on the outer surface of the crank end 1.

[0029] Finally, it should be noted that the above is only the preferred embodiment of the utility model, and is not intended to limit the utility model. This specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, technicians in the field can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein by equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A crankshaft structure, comprising a crank end (1), characterized in that: One end of the crank end (1) is fixedly connected to a camshaft drive sprocket mounting shaft (2), the outer surface of the camshaft drive sprocket mounting shaft (2) is provided with a keyway (5), the other end of the camshaft drive sprocket mounting shaft (2) is fixedly installed with a first main bearing journal (3), the interior of the first main bearing journal (3) is provided with a main journal oil circuit (4), the other end of the first main bearing journal (3) is fixedly installed with a balancing block (6), the outer surface of the balancing block (6) is fixedly connected to a crank pin journal (9), the interior of the crank pin journal (9) is provided with a crank pin oil hole (10), the other end of the crank pin journal (9) is fixedly installed with a crank (8), the outer surface of the balancing block (6) is fixedly connected to a second main bearing journal (12), and the other end of the second main bearing journal (12) is fixedly connected with a flange (11).

2. A crankshaft structure according to claim 1, characterized in that: The number of the balancing weights (6) is two groups, each group has two, and each group is symmetrically arranged.

3. A crankshaft structure according to claim 1, characterized in that: The outer surface of the main journal (7) is surrounded by a groove.

4. A crankshaft structure according to claim 1, characterized in that: The balancing block (6) and the crank (8) are fixedly connected via a crank pin journal (9).

5. A crankshaft structure according to claim 2, characterized in that: The two balancing blocks (6) and the two cranks (8) are fixedly connected by a main journal (7).

6. A crankshaft structure according to claim 2, characterized in that: The two balancing masses (6) in each group of balancing masses (6) are arranged in opposite directions.

7. A crankshaft structure according to claim 1, characterized in that: The outer surface of the crank end (1) is provided with a keyway (5).

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