CN213016568U - Steel thin-wall chromium-plated cylinder sleeve with conical structure at position above upper stop point - Google Patents

Abstract

The utility model provides a position has the steel thin wall chromium plating cylinder jacket of toper structure more than the top dead center. Comprises a lower end face, an outer surface, an inner surface, a shoulder part, an upper end face, a chromium coating and a part above the upper dead center of a piston; the geometric shape of the position above the upper dead point of the piston is improved from an inner cylindrical surface of the inner surface to a conical structure, so that the original inner surface is divided into two parts, namely the conical structure and the cylindrical surface; the conical structure is in the shape of a bell mouth and also has an inner surface and a chromium coating, the minimum dimension of the inner surface of the conical structure is also equal to the dimension of the inner cylindrical surface of the steel sleeve. The utility model discloses a move the piston to the position above the top dead center of steel cover and improve into the toper structure by interior cylinder face shape, process into the horn mouth shape, can not form the step in the work, reduce long-pending charcoal. The steel cylinder liner is suitable for being used as a steel thin-wall chromium plating cylinder liner.

Description

Steel thin-wall chromium-plated cylinder sleeve with conical structure at position above upper stop point

Technical Field

The utility model relates to a steel thin wall chromium plating cylinder jacket of automobile engine especially relates to the steel thin wall chromium plating cylinder jacket (hereinafter referred to as steel cover) that the position has the toper structure more than the top dead center.

Background

In the development of the automotive industry, the engine is an important component of the automobile, and the steel sleeve is an important part of the engine. Compared with the traditional cast iron sleeve, the steel sleeve has the advantages of small volume, light weight, energy conservation, environmental protection, long wear-resisting service life, convenient maintenance and the like, quickly replaces the application share of a part of cast iron sleeves, and is popular and favored by domestic and foreign customers.

After years of use, the steel sleeve has the defect of beauty, namely, after the upper dead center of the piston is worn out to form a step, carbon deposit is increased more quickly, the carbon deposit is easier to form when the piston goes out of the step, vicious cycle is caused, and the step is one of important reasons for causing engine failure. In order to prolong the service life of an engine, prolong the overhaul period and avoid the step generation of a steel sleeve top dead center in the work, experts, scholars and engineering technicians of a plurality of scientific research institutions and enterprises are attracted for years to pay for the steel sleeve top dead center, but the solution and the technical breakthrough are not found all the time.

Disclosure of Invention

In order to solve the piston top dead center wearing and tearing and go out the step and increase the carbon deposit, the utility model provides a position has the steel cover of toper structure more than the top dead center. The steel sleeve is improved into a conical structure from a cylindrical structure through the position above the top dead center, and is processed into a horn mouth shape, so that steps cannot be formed in the work, carbon deposit is reduced, and the technical problem that carbon deposit is increased in the steel sleeve is solved.

The utility model provides a scheme that technical problem adopted is:

the steel sleeve with the conical structure at the part above the upper dead point comprises a lower end surface, an outer surface, an inner surface, a shoulder part, an upper end surface, a chromium coating and the part above the upper dead point of the piston; the inner surface of the steel sleeve and the chromium coating are both inner cylindrical surfaces; the geometry of the position above the upper dead point of the piston is improved into a conical structure from the inner cylindrical surface of the inner surface, so that the original inner surface is divided into a conical structure and an inner surface; the conical structure is in a horn mouth shape, and is also provided with an inner surface and a chromium coating, wherein the minimum size of the inner surface is also equal to the working size of the inner cylindrical surface of the steel sleeve, and the inner surface is larger towards the upper end surface direction and can be larger than the working surface by 0.15 mm.

In order to further solve the technical problem to be solved by the invention, in the conical structure provided by the invention, when the steel sleeve is honed, the honing head extends out of the upper end surface of the steel sleeve for processing, so that the part above the upper dead point of the steel sleeve forms a bell mouth shape of the conical structure.

Furthermore, when the chromium plating layer with the conical structure is subjected to chromium plating, the part, above the top dead center position of the piston, of the anode rod is made into a conical shape, the inclination direction of the anode rod is opposite to that of the conical structure, and the inclination angle of the anode rod is symmetrical and corresponding to that of the conical structure, so that the chromium plating layer with the conical structure is thinner and thinner from the top dead center to the top, the inclination angle alpha of the conical structure is further increased under the condition that the length L of the conical structure is unchanged, and the step formation is avoided to generate.

The positive effect, because the utility model discloses a move the piston to the position above the top dead center of steel cover and improve into the toper structure by interior cylinder surface shape, process into the horn mouth shape, can not form the step in the work, reduce long-pending charcoal, further realize energy saving and emission reduction, reduce the car overhaul, prolonged engine life, produced economic benefits and social. The steel sleeve is suitable for use.

Drawings

FIG. 1 is a cross-sectional view of a prior art steel sleeve;

fig. 2 is a sectional view of the present invention;

figure 3 is a schematic view of the honing tool of the present invention;

fig. 4 is a schematic view of the chromium plating of the present invention.

In fig. 1, 1 is a lower end face, 2 is an outer face, 3 is an inner face, 4 is a shoulder portion, 5 is an upper end face, and 6 is a chromium plating layer.

In fig. 2, 7 is a conical structure, 8 is a piston, L is the length of the conical structure, and α is the inclination angle of the conical structure.

In fig. 3, 9, a honing head.

In fig. 4, 10 anode rods.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to the drawings, fig. 1 is a prior art steel sleeve, and fig. 2 shows an improved steel sleeve having a tapered structure at a position above an upper dead center according to the present invention. The steel sleeve is basically the same as the existing steel sleeve, and also comprises a lower end surface 1, an outer surface 2, an inner surface 3, a shoulder part 4, an upper end surface 5 and a chromium coating 6, wherein the inner surface 3 on one side of the upper end surface 5 is provided with a part which is consistent with the inner surface 3 and is above the upper dead center of the piston.

Different from the prior art, the position above the piston top dead center of steel cover, the geometry is improved into conical structure 7 by the inner cylinder face for former internal surface divide into conical structure 7 horn mouth shape and internal surface 3 two parts, the conical structure is the horn mouth shape, also has internal surface and chromium coating, its internal surface minimum dimension also equals steel cover internal cylinder face working dimension, it is bigger to go up the terminal surface direction more, can be 0.15mm bigger than the working face at the biggest, and conical structure 7 horn mouth shape avoids contacting with piston 8, thereby conical structure 7 can not form the step in work, reduce the production of long-pending charcoal.

In addition, as shown in fig. 3 in the specification, in the honing process of the steel sleeve having the conical structure at the position above the upper dead point, when the steel sleeve is honed, the honing head 9 extends out of the upper end surface 5 of the steel sleeve to be processed, and the conical structure 7 is formed.

Finally, as shown in fig. 4 in the specification, a steel sleeve chromium plating layer process with a conical structure is provided at a position above the top dead center, when the steel sleeve is subjected to chromium plating, the part of the anode rod 10 above the top dead center of the piston is made into a conical shape, the inclination direction of the anode rod is opposite to that of the conical structure 7, and the inclination angle of the anode rod corresponds to that of the conical structure, so that the chromium plating layer 6 with the conical structure is thinner and thinner from the top dead center to the top chromium plating layer, and the inclination angle α of the conical structure 7 is further increased under the condition that the length L of the conical structure is unchanged, thereby avoiding.

The length L of the conical structure is 10-15 mm, and the inclination angle alpha of the conical structure is 10-20'.

The working principle is as follows:

the utility model discloses a position above the steel cover piston top dead center among the prior art is improved into the toper structure by original cylindrical structure, forms horn mouth shape structure, prevents that the steel from putting the top dead center above the position and producing the step in work, has avoided the automobile engine trouble because of the carbon deposit leads to.

When an inner cylindrical surface is machined, the size of the horn mouth angle alpha is determined according to the length of the honing head 9 extending out of the upper end surface 5 of the steel sleeve, and the more the honing head extends out, the larger the angle alpha is; conversely, the less the protrusion, the smaller the angle α.

According to the principle that the deposition speed of the electroplated metal layer is in inverse proportion to the distance between the cathode and the anode, the part of the anode rod 10 above the top dead center of the piston is made into a conical shape, so that the purpose that the plated layer is thinner from the top dead center to the top can be achieved, and the angle alpha can be further increased on the basis of the honing process, namely the bell mouth is increased.

The working process is as follows:

the production process is finished in two aspects:

firstly, forming a size shaping procedure of an inner cylindrical surface inner hole, namely a honing procedure;

secondly, the electroplating process is carried out by improving the tool, namely the structural shape of the anode bar.

The utility model has the characteristics that:

the piston moves to a position above the upper stop point of the steel sleeve and is processed into a bell mouth shape, so that steps are not formed in the working process, carbon deposit is reduced, energy conservation and emission reduction are further realized, automobile overhaul is reduced, the service life of an engine is prolonged, and economic and social benefits are generated.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims (4)

1. The steel thin-wall chromium plating cylinder sleeve with the conical structure at the position above the upper stop point is characterized in that: comprises a lower end surface (1), an outer surface (2), an inner surface (3), a shoulder part (4), an upper end surface (5), a chromium coating (6) and a part above the upper stop point of a piston; the inner surface (3) of the steel sleeve and the chromium coating (6) are both inner cylindrical surfaces; the geometry of the position above the upper dead center of the piston is improved from the inner cylindrical surface of the inner surface (3) to the bell mouth shape of the conical structure (7), so that the original inner surface (3) is divided into the conical structure (7) and the inner surface (3); the conical structure (7) also has an inner surface (3) and a chromium coating (6), the smallest dimension of the conical surface of which is also equal to the dimension of the inner cylindrical surface of the steel sleeve.

2. The steel thin-wall chromium-plated cylinder liner with a conical structure above the top dead center according to claim 1, characterized in that:

when the inner surface of the conical structure (7) is honed, the honing head (9) extends out of the upper end surface (5) of the steel sleeve for processing, and the inner cavity of the cylindrical surface forms a horn mouth shape of the conical structure (7).

3. The steel thin-wall chromium-plated cylinder liner with a conical structure above the top dead center according to claim 1, characterized in that:

when the chromium plating layer (6) of the conical structure (7) is subjected to chromium plating, the part, above the upper dead center position of the piston, of the anode rod (10) is made into a conical shape, the inclination direction of the anode rod is opposite to that of the conical structure (7), the inclination angle of the anode rod symmetrically corresponds to that of the conical structure, so that the chromium plating layer (6) of the conical structure is thinner and thinner from the upper dead center to the upper part, the inclination angle alpha of the conical structure (7) is further increased under the condition that the length L of the conical structure is unchanged, and the step formation is avoided to generate carbon.

4. The steel thin-wall chromium-plated cylinder liner with a conical structure above the top dead center according to claim 1, characterized in that:

the length L of the conical structure is 10-15 mm, and the inclination angle alpha of the conical structure is 10-20'.

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