Four-stroke gasoline engine box capable of preventing collision

Abstract

The anti-collision four-stroke gasoline engine case comprises a four-stroke engine body, a gear shell is assembled on one side wall of the four-stroke engine body, and a carburetor is assembled on the other side wall of the four-stroke engine body; an anti-collision protection plate is assembled at the bottom end of the four-stroke engine body, and an oil drainage hole is formed in the position, corresponding to an engine oil drainage opening of the four-stroke engine body, of the side wall of the anti-collision protection plate. A mounting hole is formed in the anti-collision protection plate, a fastener is assembled at the bottom end of the four-stroke engine body, and the fastener is inserted into the mounting hole; the four-stroke gasoline engine box capable of preventing collision is simple in structure and convenient to operate, the fastening piece is arranged at the bottom end of the four-stroke engine body, and the anti-collision protection plate is installed through the fastening piece, so that the bottom end of the engine body is protected, and the engine body is prevented from being damaged.

Description

Technical Field

[0001] This patent relates to the field of four-stroke engines, and more specifically to a collision-proof four-stroke gasoline engine case. Background Art

[0002] The working principle of a four-stroke engine is to output power by converting the up and down movement of the piston into the rotational movement of the crankshaft. The working process of a four-stroke engine is to convert the chemical energy of the fuel into the mechanical energy of the reciprocating motion of the piston. The four strokes of a four-stroke engine are intake stroke, compression stroke, power stroke and exhaust stroke. With the application of mechanization, there are many types of engines. For a single-cylinder four-stroke engine, when it is used, since the single-cylinder four-stroke engine will generate a lot of energy when working, most of the single-cylinder four-stroke engines will be used in agricultural machinery;

[0003] However, the single-cylinder four-stroke engine in the prior art still has some shortcomings. For example, the engine of agricultural machinery such as lawn mowers is often installed at the bottom of the machinery. Due to the complex agricultural terrain, when in use, the engine is at the bottom of the equipment and is prone to bumping and causing damage to the engine. Therefore, the prior art needs to be improved. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of this patent is to provide a collision-resistant four-stroke gasoline engine case.

[0005] The technical solution adopted by this patent to solve its technical problem is: a collision-proof four-stroke gasoline engine case, comprising a four-stroke engine body, a side wall of the four-stroke engine body is equipped with a gear housing;

[0006] The bottom end of the four-stroke engine body is equipped with an anti-collision guard plate, and the side wall of the anti-collision guard plate is provided with an oil drain hole at a position corresponding to the oil drain port of the four-stroke engine body;

[0007] The anti-collision guard plate is formed with a mounting hole, and the bottom end of the four-stroke engine body is equipped with a fastener, and the fastener is inserted into the mounting hole;

[0008] The fastener comprises a fastening screw and an anti-slip screw, and the fastening screw is externally threaded with a fastening nut;

[0009] An anti-slipping screw groove is formed at the bottom end of the fastening screw rod, and the anti-slipping screw rod is threadedly connected in the anti-slipping screw groove.

[0010] Furthermore, the outer part of the anti-slipping screw is sleeved with an anti-slipping cylinder, and the outer wall of the anti-slipping cylinder is equipped with three limiting columns, which are distributed in a triangle, and the inner wall of each limiting column is provided with a spiral groove matching with the fastening screw.

[0011] Furthermore, the inner wall of the anti-slipping cylinder is provided with a reverse internal thread, the outer part of the anti-slipping screw rod is provided with a reverse external thread at the joint between the anti-slipping cylinder and the anti-slipping cylinder, and the reverse internal thread and the reverse external thread match each other.

[0012] Furthermore, a rotating disk is installed at the end of the anti-slip screw, and a cross groove is provided on the outer wall of the rotating disk.

[0013] Furthermore, an annular groove is formed on the outer wall of the fastening nut, the end of the limiting column is arranged in the annular groove, a fixing ring is fixedly installed on the outer upper end of the fastening screw, and an annular pressure plate, a spring and an annular rubber sheet are mounted on the circumferential surface of the fastening screw.

[0014] Furthermore, a spark plug is installed at the upper end of the four-stroke engine body, two intake valves are arranged on the left side of the interior of the four-stroke engine body, two exhaust valves are arranged on the right side of the interior of the four-stroke engine body, a crank is installed on the lower side of the inner end of the four-stroke engine body, the upper end of the crank is rotatably connected to a connecting rod, the upper end of the connecting rod is fixedly connected to a piston, and a cylinder chamber is opened in the middle part of the inner end of the four-stroke engine body.

[0015] Furthermore, a positioning hole is provided on the side wall of the anti-collision guard plate at the mounting hole, and a mounting portion is assembled at the edge of the anti-collision guard plate.

[0016] The beneficial effects of this patent are:

[0017] The invention discloses a collision-proof four-stroke gasoline engine case, which has a simple structure and is easy to operate. Fasteners are arranged at the bottom end of a four-stroke engine body, and an anti-collision guard plate is installed through the fasteners, so that the bottom end of the engine body is protected to prevent damage to the engine body. Under the action of an anti-slip cylinder, a circumferential limit is implemented on a fastening nut to prevent the nut structure from rotating and causing tooth retreat. Under the meshing of a limiting column and a fastening screw, the anti-slip screw and the fastening screw are kept in a stable connection and limiting state. The engine case has a good tooth retreat prevention function, high connection strength, and extremely high connection stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of this patent.

[0019] Figure 2 It is a cross-sectional view of this patent.

[0020] Figure 3 This is a schematic diagram of the anti-collision guard plate of this patent.

[0021] Figure 4 It is a schematic diagram of the fastener of this patent.

[0022] Figure 5 It is a schematic diagram of the anti-drop tube of this patent.

[0023] Figure 6 It is a schematic diagram of the anti-slip screw of this patent.

[0024] Explanation of the accompanying drawings: 1 four-stroke engine body, 2 anti-collision guard plate, 3 gear housing, 4 fastener, 5 mounting hole, 6 fastening screw, 7 fastening nut, 8 anti-slip groove, 9 anti-slip cylinder, 10 anti-slip screw, 11 annular rotating groove, 12 fixing ring, 13 extrusion block, 14 annular pressure sheet, 15 annular rubber sheet, 16 spring, 17 limit column, 18 spiral groove, 19 reverse internal thread, 20 reverse external thread, 21 turntable, 22 positioning hole, 23 oil drain hole, 24 mounting part, 29 crank, 30 connecting rod, 31 exhaust valve, 32 cylinder chamber, 33 spark plug, 34 intake valve, 35 piston. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the contents of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to the application.

[0026] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 This is a schematic diagram of the structure of the present patent, a collision-proof four-stroke gasoline engine case, including a four-stroke engine body 1, a side wall of the four-stroke engine body 1 is equipped with a gear housing 3, the inner side of the gear housing 3 is rotatably connected with a starter shaft, the left end of the starter shaft is rotatably connected to the crank inside the four-stroke engine body 1, and the starter shaft is driven to work by the control of an external power source, and then the starter shaft drives the mechanism inside the engine body 1 to rotate, and then the mixed gas is ignited by sparks inside the four-stroke engine body 1, the burning gas expands rapidly, pushes the piston downward, and converts the internal energy into mechanical energy;

[0027] The bottom end of the four-stroke engine body 1 is equipped with an anti-collision guard plate 2, and the side wall of the anti-collision guard plate 2 is provided with an oil drain hole 23 at a position corresponding to the oil drain port of the four-stroke engine body 1. The anti-collision guard plate 2 is made of manganese steel. The oil drain hole 23 is provided to facilitate the replacement of the oil in the four-stroke engine body 1.

[0028] The anti-collision guard plate 2 is formed with a mounting hole 5, and the bottom end of the four-stroke engine body 1 is equipped with a fastener 4, which is inserted into the mounting hole 5;

[0029] The fastener 4 includes a fastening screw 6 and an anti-stripping screw 10. The outside of the fastening screw 6 is screwed with a fastening nut 7. The fastening screw 6 and the four-stroke engine body 1 are an integrated structure. The fastener 4 can be installed in the mounting hole 5. The fastening screw 6 and the fastening nut 7 cooperate to realize the bolt in the prior art, and an anti-stripping screw groove 8 is provided at the bottom end of the fastening screw 6. The anti-stripping screw 10 is screwed in. Three limiting columns 17 installed on the anti-stripping cylinder 9 outside the anti-stripping screw 10 support the fastening nut 7, thereby circumferentially limiting the fastening nut 7, and the spiral groove 18 on the limiting column 17 is engaged with the fastening screw 6, so as to limit the anti-stripping cylinder 9 and the anti-stripping screw 10, and then the anti-collision guard plate 2 is installed to the bottom end of the four-stroke engine body 1;

[0030] The bottom end of the fastening screw 6 is provided with an anti-slipping screw groove 8 , and the anti-slipping screw 10 is screwed into the anti-slipping screw groove 8 .

[0031] The outside of the anti-slip screw 10 is sleeved with an anti-slip cylinder 9, and three limiting columns 17 are installed on the outer wall of the anti-slip cylinder 9. The three limiting columns 17 are distributed in a triangle, and the inner wall of each limiting column 17 is provided with a spiral groove 18 that cooperates with the fastening screw 6. The thread on the outside of the anti-slip screw 10 is divided into two parts. The front part cooperates with the internal thread of the anti-slip groove 8, and the rear part cooperates with the reverse internal thread 19 of the anti-slip cylinder 9, so that the anti-slip cylinder 9 is installed on the outside of the anti-slip screw 10.

[0032] The inner wall of the anti-slip cylinder 9 is provided with a reverse internal thread 19, and the outer part of the anti-slip screw 10 and the anti-slip cylinder 9 are provided with a reverse external thread 20, and the reverse internal thread 19 and the reverse external thread 20 cooperate with each other. When the anti-slip screw 10 is screwed into the anti-slip screw groove 8, the anti-slip cylinder 9 will rotate accordingly, and when the limiting column 17 contacts the fastening nut 7, it can rotate in the annular rotating groove 11 until it contacts the inner wall of the annular rotating groove 11, thereby supporting the fastening nut 7 for circumferential limiting.

[0033] A turntable 21 is installed at the end of the anti-slip screw 10, and a cross groove is provided on the outer wall of the turntable 21. The turntable 21 is used to rotate the anti-slip screw 10, and the cross groove is used to facilitate operation with a screwdriver.

[0034] The outer wall of the fastening nut 7 is provided with an annular groove 11, the end of the limiting column 17 is arranged in the annular groove 11, a fixing ring 12 is fixedly installed on the outer upper end of the fastening screw 6, and the circumferential surface of the fastening screw 6 is covered with an annular pressure plate 14, a spring 16 and an annular rubber sheet 15.

[0035] A spark plug 33 is installed at the upper end of the four-stroke engine body 1, two intake valves 34 are arranged on the left side of the interior of the four-stroke engine body 1, and two exhaust valves 31 are arranged on the right side of the interior of the four-stroke engine body 1. A crank 29 is installed on the lower side of the inner end of the four-stroke engine body 1, and a connecting rod 30 is rotatably connected to the upper end of the crank 29, and a piston 35 is fixedly connected to the upper end of the connecting rod 30. A cylinder chamber 32 is opened in the middle of the inner end of the four-stroke engine body 1, and the cylinder chamber 32 is located between the intake valve 34 and the exhaust valve 31. The piston 35 slides up and down between the inner walls of the cylinder chamber 32. The four-stroke engine body 1 mixes air and fuel in a certain proportion into a good mixed gas, which is sucked into the four-stroke engine body 1 during the intake stroke. The mixed gas is compressed, ignited and burned to generate heat energy. The high-temperature and high-pressure gas acts on the top of the piston 35, pushing the piston 35 to perform reciprocating linear motion, and outputs mechanical energy to the outside through the connecting rod 30 and the crank 29. The four-stroke engine body 1 completes a working cycle through the four strokes of intake, compression, power and exhaust.

[0036] The side wall of the anti-collision guard plate 2 is provided with a positioning hole 22 at the mounting hole, and a mounting portion 24 is assembled at the edge of the anti-collision guard plate 1. The setting of the positioning hole 22 facilitates the installation of the anti-collision guard plate 2, and the installed anti-collision guard plate 2 can be fixed on the equipment through the mounting plate 24.

[0037] Working process and principle: When in use, install the anti-collision guard plate 2 at the bottom end of the four-stroke engine body 1, insert the fastening screw 6 into the mounting hole 5, and then screw the fastening nut 7 onto the screw 6, and then install the anti-slip cylinder 9 onto the anti-slip screw 10, and screw the anti-slip screw 10 into the anti-slip screw groove 8. While screwing in, the spiral groove 18 on the limiting column 17 will engage with the external thread of the fastening screw 6 until the end of the limiting column 17 is placed in the annular rotating groove 11 on the fastening nut 7, limit the fastening nut 7, and then install the four-stroke engine body 1 on the equipment.

[0038] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0039] 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. A collision-proof four-stroke gasoline engine case, comprising a four-stroke engine body (1), characterized in that: A gear housing (3) is mounted on one side wall of the four-stroke engine body (1); The bottom end of the four-stroke engine body (1) is equipped with an anti-collision guard plate (2), and a side wall of the anti-collision guard plate (2) is provided with an oil drain hole (23) at a position corresponding to the oil drain port of the four-stroke engine body (1); The anti-collision guard plate (2) is formed with a mounting hole (5), the bottom end of the four-stroke engine body (1) is equipped with a fastener (4), and the fastener (4) is inserted into the mounting hole (5); The fastener (4) comprises a fastening screw (6) and an anti-slip screw (10), and a fastening nut (7) is threadedly connected to the outside of the fastening screw (6); The bottom end of the fastening screw rod (6) is provided with an anti-slipping screw groove (8), and the anti-slipping screw rod (10) is screwed into the anti-slipping screw groove (8).

2. A collision-proof four-stroke gasoline engine case according to claim 1, characterized in that: The anti-slipping screw (10) is sleeved with an anti-slipping cylinder (9) on its exterior, and the outer wall of the anti-slipping cylinder (9) is provided with three limiting columns (17), which are distributed in a triangular shape, and the inner wall of each limiting column (17) is provided with a spiral groove (18) that matches the tightening screw (6).

3. A collision-proof four-stroke gasoline engine case according to claim 2, characterized in that: The inner wall of the anti-slip cylinder (9) is provided with a reverse internal thread (19), and the outer part of the anti-slip screw (10) where it fits with the anti-slip cylinder (9) is provided with a reverse external thread (20), and the reverse internal thread (19) and the reverse external thread (20) are matched.

4. A collision-proof four-stroke gasoline engine case according to claim 3, characterized in that: A rotating disk (21) is installed at the end of the anti-slip screw (10), and a cross groove is formed on the outer wall of the rotating disk (21).

5. The collision-proof four-stroke gasoline engine case according to claim 1, characterized in that: The outer wall of the fastening nut (7) is provided with an annular rotation groove (11), the end of a limiting column (17) is arranged inside the annular rotation groove (11), a fixing ring (12) is fixedly mounted on the outer upper end of the fastening screw (6), and the circumferential surface of the fastening screw (6) is covered with an annular pressure plate (14), a spring (16) and an annular rubber sheet (15).

6. The collision-proof four-stroke gasoline engine case according to claim 1, characterized in that: A spark plug (33) is installed at the upper end of the four-stroke engine body (1); two intake valves (34) are arranged on the left side of the interior of the four-stroke engine body (1); two exhaust valves (31) are arranged on the right side of the interior of the four-stroke engine body (1); a crank (29) is installed on the lower side of the inner end of the four-stroke engine body (1); a connecting rod (30) is rotatably connected to the upper end of the crank (29); a piston (35) is fixedly connected to the upper end of the connecting rod (30); and a cylinder chamber (32) is opened in the middle of the inner end of the four-stroke engine body (1).

7. The collision-proof four-stroke gasoline engine case according to claim 1, characterized in that: A positioning hole (22) is provided on the side wall of the anti-collision guard plate (2) at the mounting hole, and a mounting portion (24) is mounted on the edge of the anti-collision guard plate (2).

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