Integrated reversing engine crankcase assembly

Abstract

An integrated reversing engine crankcase assembly comprises a crankcase and a transmission case, a cylinder block mounting plane is arranged on the large head side of the crankcase assembly, and engine suspension mounting points are arranged on the periphery of the cylinder block mounting plane; a shaft hole of an output shaft and a mounting plane of a propeller are arranged on the small end side of the crankcase assembly; a piston type air supply pump is arranged on the left side of the crankcase assembly and takes air from the crankcase assembly. A reed valve air inlet is formed in the rear side of the crankcase assembly. The transmission case is connected with the crankcase, and a reversing structure is formed through gear meshing connection. The crankcase assembly is compact in structural design, the radial size of an engine is reduced, and the output direction is changed through gear transmission.

Description

Technical Field

[0001] This utility model relates to the field of two-stroke piston engine technology, specifically to an integrated commutation engine crankcase assembly. Background Technology

[0002] Commercially available engines, whether two-stroke or four-stroke, generally output power directly through the crankshaft, without changing the crankshaft's output direction. However, when mounted on specialized equipment or machinery, space constraints necessitate changing the crankshaft's output direction. For example, marine outboard motors or loitering munitions require a transmission system to alter the output direction. Traditional engines typically use belt drives, which suffer from short shelf lives, often hindering the engine's successful market entry. Summary of the Invention

[0003] To address the aforementioned problems, the purpose of this utility model is to provide an integrated reversing engine crankcase assembly. The crankcase assembly includes a crankcase and a transmission case. A cylinder block mounting plane is provided on the larger end side of the crankcase assembly, and engine mount points are arranged around this mounting plane. An output shaft bore and a propeller mounting plane are provided on the smaller end side of the crankcase assembly. A piston-type air pump is located on the left side of the crankcase assembly, drawing air from the crankcase assembly. A reed valve air inlet is located on the rear side of the crankcase assembly. The transmission case is connected to the crankcase via gear meshing, forming a reversing structure. The crankcase assembly has a compact design, reducing the engine's radial dimensions, and changes the output direction through gear transmission.

[0004] The crankcase assembly has a cylinder block mounting position and a crankcase scavenging passage on its large end side.

[0005] The air intake of the piston-type air pump is connected to the crankcase, and air is drawn from the crankcase, eliminating the need for a separate air intake port and increasing compactness.

[0006] The reed valve inlet is located on the rear side of the crankcase.

[0007] The transmission box is adjacent to the crankcase, and the output direction is changed through gear transmission. The output axis is on the same axis as the center line of the cylinder block. Attached Figure Description

[0008] Figure 1 This is the assembly drawing of this utility model;

[0009] In the picture:

[0010] 1-Crankcase assembly; 2-Crankcase; 3-Transmission case side cover; 4-Transmission case front cover.

[0011] Figure 2 This is a structural diagram of the crankcase assembly of this utility model;

[0012] In the picture:

[0013] 1-Crankcase assembly; 10-Cylinder block mounting surface; 20-Piston-type air pump; 30-Reed valve inlet; 40-Transmission box; 50-Crankcase; 60-Propeller mounting surface.

[0014] Figure 3 This is an attempt at the output end of the crankcase assembly of this utility model. Detailed Implementation

[0015] The structure of this utility model will be further described below with reference to the accompanying drawings.

[0016] like Figure 1 As shown, the assembly of this utility model includes a crankcase (2), a transmission box side cover (3), a transmission box front cover (4), and several fastening screws.

[0017] The transmission box side cover (3) and transmission box front cover (4) are combined with the crankcase (2), positioned by cylindrical pins, and fastened by a number of evenly distributed fastening screws to form a crankcase assembly (1).

[0018] like Figure 2 As shown, the main structure of the crankcase assembly of this utility model includes a cylinder block mounting plane (10), a piston-type air pump (20), a reed valve air inlet (30), a transmission box (40), a crankcase (50), and a propeller mounting plane (60). The cylinder block mounting plane (10) is provided with several cylinder block positioning holes and fastening bolt holes (12), and suspension mounting points (11) are provided around it; the piston-type air supply pump (20) is provided with an air intake hole that communicates with the crankcase and is directly driven by the crankshaft to provide high-pressure air; the reed valve inlet (30) is provided with a reed valve fastening bolt hole on its plane and a rubber groove is provided to improve the sealing performance; the transmission box (40) is connected to the crankcase (50) and is provided with multiple bearing seats to support the crankshaft and transmission shaft, complete the transmission and change the output direction, and the output axis is on the same axis as the cylinder block centerline; the propeller mounting plane is provided with a shaft hole (61) for the output shaft and a propeller mounting hole (62).

[0019] The crankcase assembly (1) has a compact structure design. While meeting the requirements of changing the output direction and the original functions of the engine, it reduces the overall size of the engine and improves the space utilization rate.

Claims

1. An integrated reversing engine crankcase assembly (1), comprising a crankcase (50) and a transmission box (40), wherein a cylinder block mounting plane (10) is provided on the large end side of the crankcase assembly (1), and engine mounting points (11) are provided around the cylinder block mounting plane (10); a shaft hole (61) for an output shaft and a propeller mounting hole (62) are provided on the small end side of the crankcase assembly; a piston-type air supply pump (20) is provided on the left side of the crankcase assembly (1), and the piston-type air supply pump (20) draws air from the crankcase (50); a reed valve air inlet (30) is provided on the rear side of the crankcase assembly (1); the transmission box (40) is connected to the crankcase (50) and forms a reversing structure through gear meshing; the crankcase assembly (1) has a compact structural design, reducing the radial dimension of the engine, and changing the output direction through gear transmission.

2. An integrated reversing engine crankcase assembly (1) according to claim 1, wherein the crankcase assembly has a cylinder block mounting position and a crankcase scavenging passage on the large end side.

3. An integrated reversing engine crankcase assembly (1) according to claim 1, wherein the air intake of the piston-type air pump (20) is connected to the crankcase (50) and air is taken from the crankcase (50).

4. An integrated reversing engine crankcase assembly (1) according to claim 1, wherein the reed valve inlet (30) is disposed on the rear side of the crankcase (50).

5. An integrated reversing engine crankcase assembly (1) according to claim 1, wherein the transmission box (40) is adjacent to the crankcase (50), and the output direction is changed by gear transmission, and the output axis is on the same axis as the cylinder block centerline.

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