Engine crankshaft with good negative load capacity

Abstract

An engine crankshaft with good negative load capacity belongs to the technical field of engine crankshafts and comprises a connecting shaft, cranks, connecting rod journals, flanges, a reinforcing sleeve assembly and a crank main journal, the rear end of the connecting shaft is fixedly connected with a plurality of cranks, the backs of the cranks are fixedly connected with the connecting rod journals, the flange is fixed on the connecting rod journal at the rearmost end, and the reinforcing sleeve assembly is fixed on the connecting rod journal at the rearmost end. The rear end of the crank is fixedly connected with a crank main journal, and the multiple connecting rod journals and the multiple crank main journals are fixedly sleeved with reinforcing sleeve assemblies. The problem that in the background technology, when an existing engine crankshaft is subjected to suddenly-increased negative load, a main journal and a crankshaft diameter are prone to deformation and damage, and then irreversible damage is caused to an engine can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of engine crankshafts, in particular to an engine crankshaft with good load-bearing capacity. Background Art

[0002] An engine is a machine that can convert other forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. For example, internal combustion engines usually convert chemical energy into mechanical energy. The crank-connecting rod structure is the main moving part of the engine to achieve the working cycle and complete the energy conversion. It consists of a body group, a piston-connecting rod group, and a crankshaft-flywheel group. In the power stroke, the piston bears the gas pressure and moves linearly in the cylinder, which is converted into the rotational motion of the crankshaft through the connecting rod, and the power is output from the crankshaft to the outside. In the intake, compression and exhaust strokes, the flywheel releases energy and converts the rotational motion of the crankshaft into the linear motion of the piston.

[0003] When the existing engine crankshaft is subjected to a sudden increase in load, it is easy to cause deformation and damage to the main journal and crankshaft diameter, which will further cause irreversible damage to the engine. For this reason, an engine crankshaft with good load capacity is proposed. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems existing in the prior art and to provide an engine crankshaft with good load capacity.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An engine crankshaft with good load-bearing capacity comprises: a connecting shaft, a crank, a connecting rod journal, a flange, a reinforcing sleeve assembly and a crank main journal, wherein a plurality of cranks are fixedly connected to the rear end of the connecting shaft, a connecting rod journal is fixedly connected to the back side of the crank, a flange is fixed to the connecting rod journal at the rear end, a crank main journal is fixedly connected to the rear end of the crank, and a reinforcing sleeve assembly is fixedly mounted on the plurality of connecting rod journals and the plurality of crank main journals.

[0007] The reinforcement sleeve assembly includes: a fixed semi-ring sleeve, a support column, a convex edge, a positioning bolt, a reinforcement semi-ring sleeve, a reinforcement plate, a trapezoidal groove, a fixed notch, a connecting plate and a semi-oil hole. The fixed semi-ring sleeve is provided with two, and the two fixed semi-ring sleeves are buckled on the connecting rod journal and the crank main journal. The inner side surface of the fixed semi-ring sleeve is evenly provided with a plurality of the support columns, and the support columns are pressed against the surfaces of the connecting rod journal and the crank main journal. Both ends of the fixed semi-ring sleeve are provided with convex edges, and the two convex edges are respectively pressed against the crank, and the convex edges are fixedly connected to the crank by positioning bolts. Multiple groups of the reinforcement plates are fixed on the inner side surface of the reinforcement semi-ring sleeve, and each of the two The reinforcing plates form a group, each group of reinforcing plates is arranged in a triangle shape, and multiple groups of reinforcing plates are arranged continuously. The upper end of each group of reinforcing plates is fixedly connected to the inner side surface of the reinforcing semi-ring sleeve, and the lower end of each group of reinforcing plates is fixedly connected to the outer surface of the fixed semi-ring sleeve. Reinforcing plate oil holes are arranged on multiple reinforcing plates, and the outer wall of the reinforcing semi-ring sleeve is provided with a trapezoidal groove. Fixed notches are symmetrically arranged on the side wall of the convex edge, and the connecting plate is arranged in the fixed notch and fastened by fastening bolts. Multiple semi-oil holes are continuously arranged on the lower end surface of the fixed semi-ring sleeve wall along its length direction, and the semi-oil holes arranged on the upper and lower fixed semi-ring sleeves are combined to form a fixed sleeve oil hole.

[0008] The side end surface of the fixed semi-ring sleeve at the upper end is provided with a plurality of positioning posts along its length direction, and the side end surface of the fixed semi-ring sleeve at the lower end is provided with positioning holes matching the plurality of positioning posts along its length direction, and the positioning posts are inserted into the positioning holes.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] The utility model provides an engine crankshaft with good load capacity, which can solve the problem raised in the background technology that when the existing engine crankshaft is subjected to a sudden increase in load, the main journal and the crankshaft diameter are easily deformed and damaged, thereby causing irreversible damage to the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is the overall structural front view of the utility model;

[0012] Figure 2 2. It is a schematic diagram of a fixed half-ring structure;

[0013] Figure 3 It is a top view of the fixed half ring;

[0014] Figure 4 It is a partial enlarged view of the fixed half ring sleeve;

[0015] Figure 5 It is a schematic diagram of the connection structure between the fixed half ring sleeve and the crank;

[0016] Figure 6It is a schematic diagram of the reinforcement plate structure. DETAILED DESCRIPTION

[0017] The technical solution 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 of 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.

[0018] An engine crankshaft with good load-bearing capacity comprises: a connecting shaft 1, a crank 2, a connecting rod journal 3, a flange 4, a reinforcing sleeve assembly 5 and a crank main journal 6, wherein the rear end of the connecting shaft 1 is fixedly connected to a plurality of the cranks 2, the back of the crank 2 is fixedly connected to the connecting rod journal 3, the flange 4 is fixed to the connecting rod journal 3 at the rear end, the rear end of the crank 2 is fixedly connected to the crank main journal 6, and the reinforcing sleeve assembly 5 is fixedly mounted on the plurality of the connecting rod journals 3 and the plurality of the crank main journals 6.

[0019] The reinforcing sleeve assembly 5 includes: a fixed semi-ring sleeve 5-1, a support column 5-2, a flange 5-3, a positioning bolt 5-4, a reinforcing semi-ring sleeve 5-5, a reinforcing plate 5-6, a trapezoidal groove 5-7, a fixed notch 5-8, a connecting plate 5-9 and a semi-oil hole 5-10. The fixed semi-ring sleeve 5-1 is provided with two, and the two fixed semi-ring sleeves 5-1 are buckled on the connecting rod journal 3 and the crank main journal 6. The inner side surface of the fixed semi-ring sleeve 5-1 is evenly provided with a plurality of the supporting columns 5-2, and the supporting columns 5-2 are against the surfaces of the connecting rod journal 3 and the crank main journal 6. Both ends of the fixed semi-ring sleeve 5-1 are provided with flanges 5-3, and the two flanges 5-3 are respectively against the crank 2. The flange 5-3 is fixedly connected to the crank 2 by the positioning bolt 5-4. The inner side surface of the reinforcing semi-ring sleeve 5-5 is fixed with a plurality of groups of reinforcing Strengthening plate 5-6, each two reinforcing plates 5-6 form a group, each group of reinforcing plates 5-6 is arranged in a triangle shape, and multiple groups of reinforcing plates 5-6 are arranged continuously. The upper end of each group of reinforcing plates 5-6 is fixedly connected to the inner side of the reinforcing semi-ring sleeve 5-5, and the lower end of each group of reinforcing plates 5-6 is fixedly connected to the outer surface of the fixed semi-ring sleeve 5-1. Reinforcing plate oil holes are arranged on multiple reinforcing plates 5-6, and the outer wall of the reinforcing semi-ring sleeve 5-5 is provided with a trapezoidal groove 5-7. The side wall of the convex edge 5-3 is symmetrically provided with fixed notches 5-8, and the connecting plate 5-9 is arranged in the fixed notch 5-8 and fastened by fastening bolts. The lower end surface of the fixed semi-ring sleeve 5-1 wall is continuously provided with multiple semi-oil holes 5-10 along its length direction, and the semi-oil holes 5-10 arranged on the upper and lower two fixed semi-ring sleeves 5-1 are combined to form a fixed sleeve oil hole.

[0020] The side end surface of the fixed semi-ring sleeve 5-1 at the upper end is provided with a plurality of positioning posts along its length direction, and the side end surface of the fixed semi-ring sleeve 5-1 at the lower end is provided with positioning holes matching the plurality of positioning posts along its length direction, and the positioning posts are inserted into the positioning holes.

[0021] The working principle of this utility model is:

[0022] When in use, the two fixed half rings 5-1 are enclosed on the connecting rod journal 3 and the crank main journal 6, and the flange 5-3 and the crank 2 are fixed by the positioning bolts 5-4, and then the connecting plate 5-9 is set in the fixing notch 5-8 set on the flange 5-3 of the two fixed half rings 5-1, and the installation is completed by fastening with the fastening bolts; the connecting rod is installed in the trapezoidal groove 5-7 and fastened. The trapezoidal groove 5-7 can quickly position the connecting rod so that the connecting rod is set in the middle position of the shaft diameter, which is convenient for the subsequent installation of the connecting rod and the piston;

[0023] The crankshaft is installed at the required position of the engine. When the crank 2 works with the connecting rod, the fixed semi-annular sleeve 5-1, the reinforced semi-annular sleeve 5-5 and the reinforced plate 5-6 increase the load and capacity of the connecting rod journal 3 and the crank main journal 6. If the crank 2 is subjected to a load and the connecting rod presses the reinforced semi-annular sleeve 5-5, the pressure will be dispersed through the reinforced plate 5-6. If the load is too large, the connecting rod will exert pressure on the reinforced semi-annular sleeve 5-5, and the reinforced semi-annular sleeve 5-5 will transfer the force to the reinforced plate 5-6, and the reinforced plate 5-6 will deform and collapse to offset the load and. In this way, damage to the connecting rod journal 3 and the crank main journal 6 can be avoided, and the load-bearing capacity can be increased. During maintenance, the damaged fixed semi-annular sleeve 5-1 can be removed and a new fixed semi-annular sleeve 5-1 can be reinstalled.

[0024] When the crankshaft is in use, the lubricating oil enters into the interior of the fixed semi-ring sleeve 5-1 through the fixed sleeve oil holes surrounded by the semi-oil holes 5-10, and then can lubricate and dissipate heat to the connecting rod journal 3 and the crank main journal 6. At the same time, the lubricating oil enters through the reinforcing plate oil holes set in the reinforcing plate 5-6, and the continuously set reinforcing plates 5-6 are immersed in the lubricating oil, which can lubricate and dissipate heat to the reinforcing semi-ring sleeve 5-5, thereby reducing friction and the heat generated and increasing the service life of the crankshaft.

[0025] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An engine crankshaft with good load-bearing capacity, characterized in that: include: A connecting shaft (1), a crank (2), a connecting rod journal (3), a flange (4), a reinforcing sleeve assembly (5) and a crank main journal (6); the rear end of the connecting shaft (1) is fixedly connected to a plurality of the cranks (2); the back of the crank (2) is fixedly connected to a connecting rod journal (3); the flange (4) is fixed to the connecting rod journal (3) at the rear end; the rear end of the crank (2) is fixedly connected to the crank main journal (6); a reinforcing sleeve assembly (5) is fixedly mounted on the plurality of the connecting rod journals (3) and the plurality of the crank main journals (6); the reinforcing sleeve assembly (5) comprises: a fixed semi-ring sleeve (5-1), a supporting sleeve (5-2), a supporting sleeve (5-3), a reinforcing sleeve assembly (5-4), a reinforcing sleeve assembly (5-5), a reinforcing sleeve assembly (5-6), a reinforcing sleeve assembly (5-6), a reinforcing sleeve assembly (5-7), a reinforcing sleeve assembly (5-8), a reinforcing sleeve assembly (5-9), a reinforcing sleeve assembly (5-11), a reinforcing sleeve assembly (5-12), a reinforcing sleeve assembly (5-13), a reinforcing sleeve assembly (5-14), a reinforcing sleeve assembly (5-15), a reinforcing sleeve assembly (5-16), a reinforcing sleeve assembly (5-17), a reinforcing sleeve assembly (5-18), a reinforcing sleeve assembly (5-19), a reinforcing sleeve assembly (5-21), a reinforcing sleeve assembly (5-22), a reinforcing sleeve assembly (5-23), a reinforcing sleeve assembly (5-24), a reinforcing sleeve assembly (5-25), a reinforcing sleeve assembly (5-26), a reinforcing sleeve assembly (5-27), a reinforcing sleeve assembly (5-28), a reinforcing sleeve assembly (5-29), a reinforcing sleeve assembly (5-29), a reinforcing sleeve assembly A support column (5-2), a convex edge (5-3), a positioning bolt (5-4), a reinforcing semi-ring sleeve (5-5), a reinforcing plate (5-6), a trapezoidal groove (5-7), a fixing notch (5-8), a connecting plate (5-9) and a semi-oil hole (5-10); the fixing semi-ring sleeve (5-1) is provided in two pieces, the two fixing semi-ring sleeves (5-1) are buckled on the connecting rod journal (3) and the crank main journal (6); a plurality of the supporting columns (5-2) are evenly arranged on the inner side surface of the fixing semi-ring sleeve (5-1); the supporting columns (5-2) are pressed against the surfaces of the connecting rod journal (3) and the crank main journal (6); the fixing semi-ring sleeve (5-1) is provided with a plurality of supporting columns (5-2) on the inner side surface; the supporting columns (5-2) are pressed against the surfaces of the connecting rod journal (3) and the crank main journal (6); Both ends of the fixed semi-annular sleeve (5-1) are provided with convex edges (5-3), the two convex edges (5-3) respectively abut against the crank (2), the convex edges (5-3) are fixedly connected to the crank (2) via positioning bolts (5-4), a plurality of groups of reinforcing plates (5-6) are fixed to the inner side surface of the reinforcing semi-annular sleeve (5-5), each two reinforcing plates (5-6) form a group, each group of reinforcing plates (5-6) is arranged in a triangular shape, the plurality of groups of reinforcing plates (5-6) are arranged continuously, the upper end of each group of reinforcing plates (5-6) is fixedly connected to the inner side surface of the reinforcing semi-annular sleeve (5-5), and each group of reinforcing plates (5-6) is fixedly connected to the inner side surface of the reinforcing semi-annular sleeve (5-5). ) is fixedly connected to the outer surface of the fixed semi-ring sleeve (5-1), a plurality of the reinforcing plates (5-6) are each provided with a reinforcing plate oil hole, a trapezoidal groove (5-7) is provided on the outer wall of the reinforcing semi-ring sleeve (5-5), a fixing notch (5-8) is symmetrically provided on the side wall of the convex edge (5-3), the connecting plate (5-9) is arranged in the fixing notch (5-8) and is fastened by a fastening bolt, a plurality of the semi-oil holes (5-10) are continuously provided on the lower end surface of the wall of the fixed semi-ring sleeve (5-1) along its length direction, and the semi-oil holes (5-10) provided on the upper and lower fixed semi-ring sleeves (5-1) are combined to form a fixed sleeve oil hole.

2. An engine crankshaft with good load capacity according to claim 1, characterized in that: The side end surface of the fixed semi-ring sleeve (5-1) at the upper end is provided with a plurality of positioning posts along its length direction, and the side end surface of the fixed semi-ring sleeve (5-1) at the lower end is provided with positioning holes matching the plurality of positioning posts along its length direction, and the positioning posts are inserted into the positioning holes.

Images