Cylinder sleeve structure avoiding motion envelope of connecting rod and engine

Abstract

The utility model discloses a cylinder sleeve structure avoiding connecting rod motion envelope and an engine, a groove is arranged in the lower area of a cylinder sleeve, and the groove is arranged on the offset side of the center line of a crankshaft hole so as to increase the distance between the cylinder sleeve and the center line of the crankshaft hole, so that the offset amount of the center line of the crankshaft hole can be increased, and meanwhile, the cylinder sleeve structure can avoid connecting rod motion envelope. A gap exists between the groove and the connecting rod movement envelope to increase the distance between the connecting rod and the cylinder sleeve, so that the cylinder sleeve does not interfere with the movement of the connecting rod, the lateral friction force of the piston is effectively reduced, and the heating efficiency of the engine is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of engine, concretely relates to a crankshaft offset engine. BACKGROUND

[0002] The center line of the crankshaft hole of the engine and the center line of the cylinder hole are usually designed as coplanar, which will cause large lateral friction force when the piston works, affect the service life of the piston and the output power of the engine, in order to reduce the lateral friction force when the piston works, in the prior art, the center line of the crankshaft hole of the engine and the center line of the cylinder hole are configured as not coplanar, so that the center line of the crankshaft hole is offset to the piston main thrust side by a certain distance.

[0003] The engine disclosed by the patent with the announcement number CN 214196480 U includes an engine cylinder body, a piston, a connecting rod and a crankshaft, the crankshaft is arranged in the main shaft hole of the engine cylinder body, one connecting rod is arranged between each piston and the crankshaft, the small end of the connecting rod is connected with the piston through a piston pin, the piston pin is arranged in the piston pin hole in the piston, the large end of the connecting rod is connected with the connecting rod journal of the crankshaft, and the center line of the crankshaft and the center line of the piston pin are both positively offset relative to the plane where the center line of the engine cylinder is located, so that the working noise of the engine is reduced, and the friction and wear between the piston and the cylinder wall are reduced.

[0004] However, offsetting the center line of the crankshaft hole relative to the center line of the engine cylinder will cause the gap between the connecting rod and the cylinder to be reduced, not only limits the offset amount of the center line of the crankshaft hole, but also interferes with the movement of the connecting rod, and cannot reduce the lateral friction force of the piston.

[0005] Therefore, how to effectively increase the offset amount of the center line of the crankshaft hole while enabling the connecting rod to move smoothly and effectively reducing the lateral friction force of the piston has become a problem to be solved in the field. UTILITY MODEL CONTENTS

[0006] In view of the defects of the prior art, the purpose of the utility model is to provide a cylinder sleeve structure capable of increasing the offset amount of the center line of the crankshaft hole, not interfering with the movement of the connecting rod and effectively reducing the lateral friction force of the piston.

[0007] In order to achieve the above purpose, the cylinder sleeve structure for avoiding the movement envelope of the connecting rod provided by the utility model is used to cooperate with the connecting rod, and includes a cylinder body, a cylinder sleeve, a crankshaft hole and a cylinder hole, the center line of the crankshaft hole is offset relative to the center line of the cylinder body,

[0008] The lower region of the cylinder sleeve is provided with a groove, the groove is arranged on the side offset by the center line of the crankshaft hole, and there is a gap between the groove and the movement envelope of the connecting rod.

[0009] Further, the gap is greater than or equal to 3mm.

[0010] Furthermore, the groove is provided on the main thrust side of the piston.

[0011] Furthermore, the groove corresponds to the connection area between the large end of the connecting rod and the rod body.

[0012] Furthermore, the groove is configured to have a rectangular cross-section.

[0013] In order to achieve the above-mentioned purpose, the engine provided by the present invention includes the cylinder liner structure that avoids the motion envelope of the connecting rod.

[0014] The utility model provides a cylinder liner structure and an engine for avoiding the motion envelope of the connecting rod. A groove is provided in the lower area of ​​the cylinder liner, and the groove is arranged on the side of the offset of the center line of the crankshaft hole to increase the distance between the cylinder liner and the center line of the crankshaft hole, so that the offset amount of the center line of the crankshaft hole can be increased. At the same time, there is a gap between the groove and the motion envelope of the connecting rod to increase the spacing between the connecting rod and the cylinder liner, so that the cylinder liner will not interfere with the movement of the connecting rod, thereby effectively reducing the lateral friction of the piston and improving the heating efficiency of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is an overall schematic diagram of the cylinder liner structure for avoiding the motion envelope of the connecting rod provided by the present invention;

[0017] Figure 2 for Figure 1 AA cross-sectional view;

[0018] Figure 3 for Figure 1 BB cross-sectional view;

[0019] Figure 4 Schematic diagram of the cooperation between the groove and the motion envelope of the connecting rod in the present invention;

[0020] Figure 5 It is a structural schematic diagram of the connecting rod in the utility model.

[0021] Reference numerals:

[0022] 1. Cylinder block; 2. Cylinder liner; 3. Crankshaft bore; 31. Crankshaft bore centerline; 4. Cylinder bore; 41. Cylinder bore centerline; 5. Groove; 6. Connecting rod motion envelope; 7. Connecting rod; 71. Big end; 72. Rod shaft; 73. Sidewall. DETAILED DESCRIPTION

[0023] In order to make the technical means, creation characteristics, achieve purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific drawings.

[0024] Referring to Figures 1 to 3 , it shows a cylinder sleeve structure provided by the utility model for avoiding connecting rod motion envelope.

[0025] As shown in the drawings, the cylinder sleeve structure for avoiding connecting rod motion envelope in the example is used to cooperate with the connecting rod 7, mainly comprising a cylinder body 1, a cylinder sleeve 2, a crankshaft hole 3 and a cylinder hole 4, and the crankshaft hole center line 31 is offset relative to the cylinder body center line 41.

[0026] Further, the lower region of the cylinder sleeve 2 is provided with a groove 5, the groove 5 is arranged on the side offset from the crankshaft hole center line 31 and there is a gap L between the groove 5 and the connecting rod motion envelope 6, so as to increase the offset amount of the crankshaft hole center line 31, so that the distance between the cylinder sleeve 2 and the connecting rod satisfies the connecting rod motion envelope 6, and the movement of the connecting rod 7 will not be interfered, thereby effectively reducing the lateral friction force of the piston.

[0027] In combination with Figure 2 and Figure 3 , specifically, the groove 5 is preferably arranged on the main thrust side of the piston, so that the distance between the connecting rod 7 and the cylinder sleeve 2 on the side where the connecting rod 7 releases energy under the pushing of the piston is increased, the connecting rod 7 can stably move and release, and will not be interfered by the cylinder sleeve 2, so that the movement of the piston in the cylinder is more stable, and the friction and wear between the piston and the cylinder sleeve 2 are reduced, and the lateral friction force of the piston is effectively reduced.

[0028] In combination with Figure 4 and Figure 5 , further, the groove 5 is arranged in the lower region of the cylinder sleeve 2 and corresponds to the connection region of the large end 71 and the shaft body 72 of the connecting rod 7, since the connection region of the large end 71 and the shaft body 72 of the connecting rod 7 is closest to the cylinder sleeve 2 in the movement process of the connecting rod 7, the groove 5 is configured to correspond to the connection region of the large end 71 and the shaft body 72, so as to effectively increase the distance between the cylinder sleeve 2 and the closest region of the connecting rod, so that the distance between the connecting rod and the cylinder sleeve 2 satisfies the requirement of the connecting rod motion envelope 6, and the connecting rod motion envelope 6 is the movement track of the connecting rod 7, thereby ensuring that the movement of the connecting rod 7 will not be interfered by the cylinder sleeve 2.

[0029] In combination with Figure 4 , preferably, the gap L between the groove 5 and the connecting rod motion envelope 6 is configured to be ≥3mm, which can provide sufficient movement distance for the connecting rod motion envelope 6, and also can increase the offset amount of the crankshaft hole center line 31, so as to effectively reduce the lateral friction force of the piston.

[0030] Here, the gap L between the groove 5 and the connecting rod motion envelope 6 can also be adaptively adjusted according to the connecting rod motion envelope 6.

[0031] As an example, in this example, the recess 5 is configured as a rectangular cross-section, so that the recess 5 can be adapted to the side wall 73 of the connecting rod 7, without interfering with the connecting rod movement.

[0032] In some embodiments, the cylinder block 1 is composed of a cast iron cylinder block, at this time, the cylinder liner 2 is not arranged, the recess 5 is directly arranged in the lower region of the cylinder block 1, and there is a gap L between the recess 5 and the connecting rod movement envelope 6.

[0033] Therefore, the cylinder liner structure for avoiding the connecting rod movement envelope provided by the utility model can increase the offset amount of the crankshaft hole center line 31 through the cooperation of the recess 5 and the connecting rod movement envelope 6, so that the cylinder liner 2 effectively avoids the connecting rod movement envelope 6, without causing the connecting rod movement interference, thereby effectively reducing the lateral friction force of the piston.

[0034] The utility model also provides an engine, the engine includes the cylinder liner structure for avoiding the connecting rod movement envelope composed of the above-mentioned scheme, so that the engine can work stably and reliably, and the heat generation efficiency of the engine is improved.

[0035] In some embodiments, the crankshaft hole center line 31 and the cylinder block center line 41 are not offset, that is, when the crankshaft hole center line 31 and the cylinder block center line 41 coincide as the same plane, the phenomenon that the gap between the connecting rod movement envelope 6 and the cylinder liner 2 does not meet the demand of the connecting rod movement envelope 6 will also occur, in this case, the cylinder liner structure for avoiding the connecting rod movement envelope provided by the utility model can also be used, that is, the corresponding recess 5 is arranged at the position of the cylinder liner 2 that does not meet the gap requirement, so as to meet the demand of the connecting rod movement envelope 6, without causing the interference with the connecting rod movement, thereby reducing the lateral friction force of the piston.

[0036] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above-mentioned embodiments, the above-mentioned embodiments and the description in the specification are only to illustrate the principle of the utility model, under the premise of not departing from the spirit and scope of the utility model, the utility model will also have various changes and improvements, these changes and improvements all fall within the scope of the utility model claimed for protection. The protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A cylinder liner structure that avoids the motion envelope of a connecting rod, used to cooperate with a connecting rod, comprising a cylinder block, a cylinder liner, a crankshaft hole and a cylinder hole, wherein the centerline of the crankshaft hole is offset relative to the centerline of the cylinder block, and characterized in that: A groove is provided in the lower area of ​​the cylinder liner. The groove is arranged on a side offset from the center line of the crankshaft hole and has a gap with the motion envelope of the connecting rod.

2. The cylinder liner structure for avoiding connecting rod motion envelope according to claim 1, characterized in that: The gap is ≥3mm.

3. The cylinder sleeve structure for avoiding connecting rod motion envelope according to claim 1, characterized in that: The groove is arranged on the main thrust side of the piston.

4. The cylinder sleeve structure for avoiding connecting rod motion envelope according to claim 1, characterized in that: The groove corresponds to the connection area between the large end of the connecting rod and the rod body.

5. The cylinder liner structure for avoiding connecting rod motion envelope according to claim 1, characterized in that: The groove is configured to have a rectangular cross-section.

6. An engine, characterized in that: A cylinder liner structure for avoiding connecting rod motion envelope according to any one of claims 1 to 5.

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