Scavenging passage of two-stroke engine capable of controlling opening and closing degree

Abstract

The utility model discloses a two-stroke engine scavenging duct capable of controlling the opening and closing degree, which comprises a scavenging duct main body, an opening degree adjusting mechanism is arranged on the side face of the scavenging duct main body, a fixed pressing strip is arranged on the outer side of the opening degree adjusting mechanism, and the opening degree adjusting mechanism comprises a throttle grille, a spring and an adjusting knob. The throttle grating is slidably mounted on the side end face of the scavenging duct body and elastically connected with the scavenging duct body through a spring, the adjusting knob is movably mounted at the outer end of the scavenging duct body, a first magnet fixedly connected is arranged on the side face of the throttle grating, and a second magnet fixedly connected with the adjusting knob is arranged at the tail end of the adjusting knob. The adjusting knob and the throttle grating repel each other through the first magnet and the second magnet. The two-stroke engine has the advantage that the scavenging duct can be adjusted, and the problems that in the prior art, a scavenging duct of a two-stroke engine cannot be adjusted, so that the fuel economic performance of the engine is reduced, and emission pollution is increased are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of two-stroke engines, in particular to a scavenging passage of a two-stroke engine with controllable opening and closing sizes. Background Art

[0002] In the field of two-stroke engines, the scavenging duct is the core part of the engine. In the design and optimization of two-stroke engines, the opening and closing size adjustment of the scavenging duct is a key factor, which is directly related to the engine's combustion efficiency, emission performance and overall operating stability.

[0003] The scavenging duct of a traditional two-stroke engine is often designed with a fixed size, which results in the vehicle being unable to fully meet the engine's refined requirements for airflow management under different operating conditions when facing complex and changeable operating conditions. This not only limits the engine performance, but also leads to reduced fuel economy, increased emission pollution, and insufficient operating stability. Therefore, a scavenging duct for a two-stroke engine with controllable opening and closing size is needed to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a scavenging duct of a two-stroke engine with controllable opening and closing size, which has the advantage of adjustable scavenging duct and solves the problem in the prior art that the scavenging duct of the two-stroke engine cannot be adjusted, resulting in reduced fuel economy performance of the engine and increased emission pollution.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a scavenging duct of a two-stroke engine with controllable opening and closing size, comprising a scavenging duct body, an opening adjustment mechanism is arranged on the side of the scavenging duct body, and a fixed pressure strip is arranged on the outer side of the opening adjustment mechanism;

[0006] The opening adjustment mechanism includes a throttle grille, a spring and an adjusting knob. The throttle grille is slidably mounted on the side end surface of the scavenging duct body and is elastically connected to the scavenging duct body through a spring. The adjusting knob is movably mounted on the outer end of the scavenging duct body. A first magnet fixedly connected to the side of the throttle grille is provided, and a second magnet fixedly connected to the end of the adjusting knob is provided. The adjusting knob and the throttle grille repel each other through the first magnet and the second magnet.

[0007] As a preferred scavenging duct of a two-stroke engine with controllable opening and closing size of the utility model, the side wall of the scavenging duct body is provided with a slide groove, and the throttle grille is provided with a limit plate cooperating with the slide groove, and the limit plate is installed in the slide groove and elastically connected with the scavenging duct body through a spring.

[0008] As a preferred embodiment of the scavenging passage of a two-stroke engine with controllable opening and closing size of the utility model, a throttle slot is provided on the throttle grille, and the throttle slot is an isosceles trapezoidal through hole.

[0009] As a preferred embodiment of the utility model of a scavenging duct of a two-stroke engine with controllable opening and closing size, the outer end face of the adjusting knob is provided with an external thread, the outer side of the scavenging duct body is provided with an internal threaded sleeve, and the adjusting knob is inserted into the internal threaded sleeve and threadedly connected thereto.

[0010] As a preferred embodiment of the scavenging passage of a two-stroke engine with controllable opening and closing size of the utility model, a clamping plate is arranged on the top of the regulating knob, and a vertical plate is arranged on the upper end surface of the clamping plate.

[0011] As a preferred embodiment of the scavenging passage of a two-stroke engine with controllable opening and closing size of the utility model, the side end surface of the clamping plate is provided with a clamping groove cooperating with the fixed pressure strip, and the clamping groove is a plurality of circular arc-shaped notches in a circumferential array.

[0012] As a preferred embodiment of the scavenging passage of a two-stroke engine with controllable opening and closing size of the utility model, an elastic part is arranged on the fixed pressure strip, and the elastic part is an arc-shaped convex structure.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. The utility model realizes non-contact driving between the adjusting knob and the throttle grille through the repulsive effect of the first magnet and the second magnet. This design allows the user to easily rotate the adjusting knob to accurately control the degree of spring compression, thereby pushing the throttle grille to slide along the slide groove, thereby realizing continuous adjustment of the throttle gap width, meeting the airflow management requirements under different working conditions, increasing the fuel economy performance of the engine, reducing emission pollution, and will not damage the sealing performance of the engine cavity, thereby ensuring the overall structural strength of the engine and improving the service life of the engine.

[0015] 2. The utility model forms a locking mechanism by designing the card plate and the card slot on the top of the adjustment knob and using it in conjunction with the fixed pressure strip. When adjusted into place, the fixed pressure strip falls into the card slot. Due to the elastic part design of the fixed pressure strip, it can provide appropriate resistance to prevent the adjustment knob from accidentally rotating due to vibration, ensuring that the adjusted state is maintained and will not change easily, thereby ensuring the stability of the scavenging duct size adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 2 For the utility model Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 This is a schematic diagram of the knob and the pressure strip in the present utility model in cooperation with each other;

[0019] Figure 4 It is a schematic diagram of the structure of the air-saving grille of the utility model.

[0020] In the figure: 1. scavenging duct body; 101. slide groove; 102. internal threaded sleeve; 2. opening adjustment mechanism; 201. spring; 202. air-throttle grille; 2021. limit plate; 2022. first magnet; 2023. air-throttle gap; 203. adjustment knob; 2031. second magnet; 2032. clamping plate; 2033. vertical plate; 2034. clamping groove; 204. fixed pressure strip; 2041. elastic part. DETAILED DESCRIPTION

[0021] See also Figure 1-Figure 4 A scavenging duct of a two-stroke engine with controllable opening and closing size comprises a scavenging duct body 1, an opening adjustment mechanism 2 is arranged on the side of the scavenging duct body 1, and a fixed pressure strip 204 is arranged on the outer side of the opening adjustment mechanism 2;

[0022] The opening adjustment mechanism 2 includes a throttle grille 202, a spring 201 and an adjusting knob 203. The throttle grille 202 is slidably mounted on the side end surface of the scavenging duct body 1 and is elastically connected to it through the spring 201. The adjusting knob 203 is movably mounted on the outer end of the scavenging duct body 1. A first magnet 2022 is fixedly connected to the side of the throttle grille 202. A second magnet 2031 is fixedly connected to it at the end of the adjusting knob 203. The adjusting knob 203 and the throttle grille 202 repel each other through the first magnet 2022 and the second magnet 2031.

[0023] Furthermore, a slide groove 101 is provided on the side wall of the scavenging duct body 1, and a limit plate 2021 cooperating with the slide groove 101 is provided on the throttle grille 202. The limit plate 2021 is installed in the slide groove 101 and elastically connected to the scavenging duct body 1 through a spring 201.

[0024] Under the elastic action of the spring 201, the limit plate 2021 drives the throttle grille 202 to move toward the end of the adjusting knob 203. The limit plate 2021 limits the sliding distance of the throttle grille 202 to prevent the throttle grille 202 from falling off the slide groove 101. At the same time, it can prevent the throttle grille 202 from being stuck due to uneven force. As the adjusting knob 203 is fed forward, the throttle grille 202 squeezes the spring 201 under the exclusion action of the first magnet 2022 and the second magnet 2031, and slides along the slide groove 101, so that different areas of the throttle gap 2023 on the throttle grille 202 are aligned with the scavenging duct body 1.

[0025] Furthermore, a throttle slot 2023 is provided on the throttle grille 202, and the throttle slot 2023 is an isosceles trapezoidal through hole.

[0026] When the throttle grille 202 is sliding, the width of the throttle gap 2023 opposite to the scavenging passage is gradually increased or decreased, thereby achieving the purpose of adjusting the opening and closing size of the scavenging passage.

[0027] Furthermore, an outer end surface of the adjusting knob 203 is provided with an external thread, an inner thread sleeve 102 is provided on the outer side of the scavenging duct body 1, and the adjusting knob 203 is inserted into the inner thread sleeve 102 and is threadedly connected thereto.

[0028] By rotating the adjusting knob 203 , the adjusting knob 203 is moved closer to or away from the throttle grille 202 , so that the adjusting grille is pressed against the spring 201 to slide under the action of the first magnet 2022 and the second magnet 2031 .

[0029] Furthermore, a clamping plate 2032 is disposed on the top of the adjusting knob 203 , and a vertical plate 2033 is disposed on the upper end surface of the clamping plate 2032 .

[0030] The vertical plate 2033 facilitates exertion of force to rotate the adjusting knob 203 , and the vertical plate 2033 facilitates determination of the rotation angle of the adjusting knob 203 , thereby facilitating precise adjustment of the feeding depth of the adjusting knob 203 .

[0031] Furthermore, a side surface of the clamping plate 2032 is provided with a clamping groove 2034 that cooperates with the fixed pressure strip 204, and the clamping groove 2034 is a plurality of circular arc-shaped notches in a circumferential array.

[0032] The pressure strip is pressed into the card slot 2034, thereby giving the card plate 2032 a certain rotation resistance, thereby preventing the adjustment knob 203 from rotating due to the vibration of the engine during the operation of the engine, thereby changing the opening of the scavenging duct body 1.

[0033] Furthermore, an elastic portion 2041 is provided on the fixed pressure strip 204 , and the elastic portion 2041 is an arc-shaped protruding structure.

[0034] Under the elastic force of the elastic part 2041, the fixed pressure strip 204 can be stuck in the slot 2034, and when the adjusting knob 203 is rotated forcefully, the fixed pressure strip 204 can be automatically picked up from the slot 2034 and enter the next slot 2034, which is convenient for adjusting the adjusting knob 203 and prevents the adjusting knob 203 from rotating under the action of the engine.

[0035] When the engine is adjusting the scavenging duct opening, the required opening degree of the scavenging duct is determined according to the working condition and performance requirements of the engine, the vertical plate 2033 of the adjusting knob 203 is held by hand, and the adjusting knob 203 is rotated according to the required opening degree. When rotating clockwise, due to the repulsive effect of the first magnet 2022 and the second magnet 2031 between the adjusting knob 203 and the throttle grille 202, the throttle grille 202 will slide along the slide groove 101 and squeeze the spring 201. When the adjusting knob 203 is rotated counterclockwise, the throttle grille 202 will rebound under the resetting effect of the spring 201. In the process of rotating the adjusting knob 203, the fixed pressure strip 204 falls into the card slot 2034 under its own elastic action, and provides a certain resistance to prevent the knob from rotating during the adjustment process or when the engine is running.

[0036] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A scavenging duct of a two-stroke engine with controllable opening and closing size, comprising a scavenging duct body (1), characterized in that: An opening adjustment mechanism (2) is provided on the side of the scavenging duct body (1), and a fixed pressure strip (204) is provided on the outer side of the opening adjustment mechanism (2); The opening adjustment mechanism (2) comprises a throttle grille (202), a spring (201) and an adjustment knob (203); the throttle grille (202) is slidably mounted on the side end surface of the scavenging duct body (1) and elastically connected thereto via the spring (201); the adjustment knob (203) is movably mounted on the outer end of the scavenging duct body (1); a first magnet (2022) fixedly connected thereto is disposed on the side surface of the throttle grille (202); a second magnet (2031) fixedly connected thereto is disposed at the end of the adjustment knob (203); the adjustment knob (203) and the throttle grille (202) repel each other via the first magnet (2022) and the second magnet (2031).

2. A scavenging passage of a two-stroke engine with controllable opening and closing size as claimed in claim 1, characterized in that: The side wall of the scavenging duct body (1) is provided with a slide groove (101), and the air throttle grille (202) is provided with a limit plate (2021) that cooperates with the slide groove (101), and the limit plate (2021) is installed in the slide groove (101) and is elastically connected to the scavenging duct body (1) through a spring (201).

3. A scavenging passage of a two-stroke engine with controllable opening and closing size as claimed in claim 2, characterized in that: The air-throttling grille (202) is provided with an air-throttling slit (2023), and the air-throttling slit (2023) is an isosceles trapezoidal through hole.

4. A scavenging passage of a two-stroke engine with controllable opening and closing size as claimed in claim 1, characterized in that: The outer end surface of the adjusting knob (203) is provided with an external thread, the outer side of the scavenging channel body (1) is provided with an internal thread sleeve (102), and the adjusting knob (203) is inserted into the internal thread sleeve (102) and is threadably connected thereto.

5. A scavenging passage of a two-stroke engine with controllable opening and closing size as claimed in claim 1, characterized in that: A clamping plate (2032) is provided on the top of the adjusting knob (203), and a vertical plate (2033) is provided on the upper end surface of the clamping plate (2032).

6. A scavenging passage of a two-stroke engine with controllable opening and closing size as claimed in claim 5, characterized in that: The side end surface of the clamping plate (2032) is provided with a clamping groove (2034) that cooperates with the fixed pressure strip (204), and the clamping groove (2034) is a plurality of circular arc-shaped notches in a circumferential array.

7. A scavenging passage of a two-stroke engine with controllable opening and closing size as claimed in claim 1, characterized in that: The fixed pressure strip (204) is provided with an elastic portion (2041), and the elastic portion (2041) is a circular arc convex structure.

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