Self-resetting flameout control mechanism

Abstract

The utility model belongs to the technical field of engine accessories, and particularly discloses a self-resetting flameout control mechanism which comprises a flameout stay wire, a mounting bracket, a flexible shaft fixing bracket and a tension spring, the flexible shaft fixing support is fixed at an engine end, the mounting support is fixed at a cab end, a guide groove is formed in the flexible shaft fixing support, and the flameout stay wire penetrates through the guide groove; a limiting piece is mounted at the head end of the flameout stay wire, a mounting groove is formed in the mounting support, the flameout stay wire penetrates through the mounting groove, and the limiting piece abuts against the peripheral side of the mounting groove; one end of the tension spring is connected to the flexible shaft fixing support, the other end of the tension spring is connected to one end of the flameout rocker arm, and the tail end of the flameout stay wire is connected to the other end of the flameout rocker arm. The fuel injection pump flameout rocker arm self-resetting device is applied to an engine with a fuel injection pump flameout rocker arm without a resetting function. The flexible shaft mounting bracket not only can position the accelerator cable and the flameout cable, but also can provide continuous pulling force for the flameout rocker arm, no additional structural member is added, the structure is simple, and the adaptive range is wide.

Description

Technical Field

[0001] This utility model belongs to the field of engine accessory technology, specifically relating to a self-resetting engine shutdown control mechanism. Background Technology

[0002] The current road roller uses a two-stage engine with its own shut-off electromagnet to control the shutdown. After ignition, the electromagnet is energized and controls the shutdown rocker arm to rotate clockwise, at which point the oil pump is in the oil supply state. After power is cut off, the shutdown rocker arm rotates counterclockwise under the action of gravity, at which point the oil pump is in the oil cut-off state. Under normal circumstances, the oil pump is in the oil cut-off state.

[0003] Market feedback indicates a high failure rate for flameout solenoids, with frequent replacements impacting customer usability. If solenoid control is not used, flameout can be achieved by controlling the flameout rocker arm via a flameout cable. Currently, common flameout control mechanisms on the market are complex, have limited compatibility, and are costly, failing to meet market demands. Utility Model Content

[0004] To address the problems of complex, limited, and costly existing flameout control structures, a self-resetting flameout control mechanism is proposed. This utility model provides the following technical solution:

[0005] A self-resetting engine shutdown control mechanism includes an engine shutdown cable for pulling an engine shutdown rocker arm, a mounting bracket for mounting the outer end of the engine shutdown cable, a flexible shaft fixing bracket for guiding the engine shutdown cable, and a tension spring for providing the elasticity required for reset. The upper end of the flexible shaft fixing bracket is provided with a guide groove, through which the engine shutdown cable passes. A limiting member is installed at the first end of the engine shutdown cable. The mounting bracket is provided with a mounting groove, through which the engine shutdown cable passes, and the limiting member abuts against the periphery of the mounting groove. One end of the tension spring is connected to the flexible shaft fixing bracket, the other end of the tension spring is connected to one end of the engine shutdown rocker arm, and the end of the engine shutdown cable is connected to the other end of the engine shutdown rocker arm.

[0006] Preferably, the extinguishing cable is curved and the included angle between the tangents at both ends of the curve is greater than 90 degrees.

[0007] Preferably, the flexible shaft fixing bracket includes a guide plate and a spring connecting plate for connecting a tension spring, which are fixedly connected to each other. The guide plate includes a mounting part, a connecting part and a guiding part connected in sequence. The spring connecting plate is vertically connected to the guiding part and connected to the tension spring at one end away from the guiding part. The mounting part is provided with a first threaded hole. The guide groove is provided on the guiding part. The fire-extinguishing cable is slidably connected or clearance-fitted to the guide groove.

[0008] Preferably, the guide section is provided with alternative guide grooves, and the guide grooves and alternative guide grooves are staggered vertically.

[0009] Preferably, the mounting portion and the connecting portion are connected in an L-shape, and the mounting portion is perpendicular to the connecting portion and the mounting portion.

[0010] Preferably, the mounting part, the connecting part, and the guiding part are respectively vertically connected to a first rib, a second rib, and a third rib.

[0011] Preferably, the first rib, the second rib, and the third rib are integrally formed with the spring plate.

[0012] Preferably, the mounting bracket includes a fixing plate, a connecting plate, and a positioning plate connected in sequence, and the mounting groove is disposed at the end of the positioning plate.

[0013] Preferably, the positioning plate is inclined, with its front end connected to the connecting plate and its end inclined upward.

[0014] Preferably, the fixing plate, connecting plate, and positioning plate are integrally formed.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This mechanism achieves the self-resetting function of the engine shutdown rocker arm through the elastic action of the tension spring. It can be directly applied to engines where the fuel injection pump shutdown rocker arm does not have a reset function, thus improving the ease of operation and safety of the engine.

[0017] 2. The flexible shaft mounting bracket can not only position the throttle cable and the engine stop cable, but also provide continuous tension to the engine stop rocker arm. No additional structural components are required, maintaining the simplicity of the structure. At the same time, it has high adaptability, is easy to replace in the market, and reduces maintenance costs.

[0018] 3. The tension spring provides stable tension, ensuring the smoothness of the engine shutdown rocker arm during the reset process, thereby improving the engine's fuel supply stability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the installation structure of the first end of the flameout pull cord of this utility model;

[0020] Figure 2 This is a schematic diagram of the installation structure of the end of the flameout pull cord of this utility model;

[0021] Figure 3 This is a schematic diagram of the specific structure of the mounting bracket of this utility model;

[0022] Figure 4 This is a schematic diagram of the overall main structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the specific structure of the flexible shaft fixing bracket of this utility model;

[0024] In the attached diagram: 1. Control box assembly; 2. Mounting bracket; 21. Fixing plate; 22. Connecting plate; 23. Positioning plate; 24. Mounting groove; 3. Limiting component; 4. Fire stop cable; 5. Engine assembly; 6. Flexible shaft fixing bracket; 61. Guide plate; 611. Mounting part; 612. Connecting part; 613. Guide part; 62. Spring connecting plate; 63. Reinforcing plate; 631. First rib; 632. Second rib; 633. Third rib; 64. Guide groove; 65. Alternate guide groove; 7. Tension spring; 8. Fire stop rocker arm. Detailed Implementation

[0025] The directional terms mentioned in the following embodiments, such as "up", "down", "left", and "right", are only for reference to the accompanying drawings. Therefore, the directional terms used are for illustration and not for limiting the invention of this utility model.

[0026] like Figure 1-5 As shown, a self-resetting engine shutdown control mechanism includes an engine shutdown cable 4 for pulling an engine shutdown rocker arm 8, a mounting bracket 2 for mounting the outer end of the engine shutdown cable 4, a flexible shaft fixing bracket 6 for guiding the engine shutdown cable 4, and a tension spring 7 for providing the elasticity required for reset. The flexible shaft fixing bracket 6 is fixed to the engine end, and the mounting bracket 2 is fixed to the cab end. The upper end of the flexible shaft fixing bracket 6 is provided with a guide groove 64, through which the engine shutdown cable 4 passes. A limiting member 3 is installed at the first end of the engine shutdown cable 4, and the mounting bracket 2 is provided with a mounting groove 24 through which the engine shutdown cable 4 passes. The mounting slot 24 is provided, and the limiting member 3 abuts against the periphery of the mounting slot 24; one end of the tension spring 7 is connected to the flexible shaft fixing bracket 6, and the other end of the tension spring 7 is connected to the lower end of the engine stop rocker arm 8, and the end of the engine stop cable 4 is hinged to the upper end of the engine stop rocker arm 8; it can realize the self-reset of the engine stop rocker arm 8, and can be directly applied to engines where the fuel injection pump stop rocker arm 8 does not have a reset function; the flexible shaft mounting bracket 2 can both position the throttle cable and the engine stop cable 4, and can also provide continuous tension to the engine stop rocker arm 8, without adding any additional structural parts, with a simple structure, good adaptability, and easy market replacement. The tension spring 7 provides stable tension, high reliability, crisp engine stop, and stable fuel supply.

[0027] Specifically, the flexible shaft fixing bracket 6 is fixed to the engine assembly 5, and the mounting bracket 2 is fixed to the side of the control box assembly 1 in the cab. The two ends of the tension spring 7 are fixed by washers, tension spring 7 bolts, and damping nuts. While commonly used compression springs are employed, their compressive force is less stable than their tensile force. This structure uses tension spring 7 bolts for fixing and damping nuts to prevent loosening, resulting in high structural stability. Adjusting the number of spring coils allows for setting the spring preload, resulting in different operating effects. The ideal setting ensures both stable fuel supply and comfortable operation.

[0028] Specifically, the engine shutdown cable has an arc-shaped bend with the angle between the tangents at both ends of the arc greater than 90 degrees, which optimizes the cable layout, reduces friction and resistance, and improves the smoothness of operation.

[0029] Specifically, the flexible shaft fixing bracket 6 includes a guide plate 61, a spring connecting plate 62 for connecting the tension spring 7, and a reinforcing plate 63 that are fixedly connected to each other. The guide plate 61 includes a mounting part 611, a connecting part 612, and a guiding part 613 connected in sequence. The spring connecting plate 62 is vertically connected to the guiding part 613 and is connected to the tension spring 7 at a section away from the guiding part 613. A first threaded hole is provided on the mounting part 611. A guide groove 64 is provided on the guiding part 613. The side wall of the flameout pull cable 4 abuts against the guide groove 64, which makes the structural stability of the flameout pull cable 4 higher.

[0030] Furthermore, the guide section 613 is provided with an alternative guide groove 65. The guide groove 64 and the alternative guide groove 65 are arranged in staggered steps, providing more installation and adjustment options and enhancing the flexibility of the mechanism.

[0031] Specifically, the mounting part 611 and the connecting part 612 are connected in an L-shape. The mounting part 611 is perpendicular to the connecting part 612 and the mounting part 612, making the mounting bracket 2 more stable and able to withstand greater tension.

[0032] Specifically, the reinforcing plate 63 includes a first rib 631, a second rib 632, and a third rib 633. The first rib 631, the second rib 632, and the third rib 633 are respectively vertically connected to the mounting part 611, the connecting part 612, and the guiding part 613, which can enhance the strength and rigidity of the flexible shaft fixing bracket 6 and improve the overall durability.

[0033] Specifically, the first rib 631, the second rib 632, the third rib 633, and the spring connecting plate 62 are integrally bent after stamping, resulting in high structural strength.

[0034] Specifically, the mounting bracket 2 includes, from bottom to top, a fixing plate 21, a connecting plate 22, and a positioning plate 23. The mounting groove 24 is located at the end of the positioning plate 23. The positioning plate 23 is inclined, and the front end of the positioning plate 23 is connected to the connecting plate 22. The end of the positioning plate 23 is inclined upward. In this embodiment, the limiting member 3 is T-shaped. The diameter of the lower vertical part of the T-shape is larger than the diameter of the extinguishing cable 4 and the width of the mounting groove 24. The two sides of the lower end of the T-shape abut against the two sides of the mounting groove 24 of the positioning plate 23. Under the action of gravity, it forms a self-limiting position to prevent the limiting member 3 and the extinguishing cable 4 from detaching from the positioning plate 23. The upper horizontal part of the T-shape forms a handle for easy manual operation.

[0035] Specifically, the fixing plate 21, the connecting plate 22, and the positioning plate 23 are integrally formed and can be bent to ensure structural strength and improve production efficiency.

Claims

1. A self-resetting flameout control mechanism, characterized in that, The device includes an exhaust cable (4) for pulling the exhaust rocker arm (8), a mounting bracket (2) for mounting the outer end of the exhaust cable (4), a flexible shaft fixing bracket (6) for guiding the exhaust cable (4), and a tension spring (7) for providing the elasticity required for resetting. The upper end of the flexible shaft fixing bracket (6) is provided with a guide groove (64), through which the exhaust cable (4) passes. A limiting member (3) is installed at the first end of the exhaust cable (4), and a mounting groove (24) is provided on the mounting bracket (2). The exhaust cable (4) passes through the mounting groove (24), and the limiting member (3) abuts against the periphery of the mounting groove (24). One end of the tension spring (7) is connected to the flexible shaft fixing bracket (6), the other end of the tension spring (7) is connected to one end of the exhaust rocker arm (8), and the end of the exhaust cable (4) is connected to the other end of the exhaust rocker arm (8).

2. The self-resetting flameout control mechanism according to claim 1, characterized in that, The extinguishing cable (4) is curved and the angle between the tangents at both ends of the curve is greater than 90 degrees.

3. The self-resetting flameout control mechanism according to claim 1, characterized in that, The flexible shaft fixing bracket (6) includes a guide plate (61) and a spring connecting plate (62) for connecting the tension spring (7) and are fixedly connected to each other. The guide plate (61) includes a mounting part (611), a connecting part (612) and a guide part (613) connected in sequence. The spring connecting plate (62) is vertically connected to the guide part (613) and connected to the tension spring (7) at one end away from the guide part (613). The mounting part (611) is provided with a first threaded hole. The guide groove (64) is provided on the guide part (613). The extinguishing cable (4) is slidably connected or clearance-fitted to the guide groove (64).

4. The self-resetting flameout control mechanism according to claim 3, characterized in that, The guide section (613) is provided with an alternative guide groove (65), and the guide groove (64) and the alternative guide groove (65) are staggered vertically.

5. The self-resetting flameout control mechanism according to claim 3, characterized in that, The mounting part (611) and the connecting part (612) are connected in an L-shape, and the mounting part (611) is perpendicular to the connecting part (612) and the mounting part (611).

6. The self-resetting flameout control mechanism according to claim 3, characterized in that, The mounting part (611), the connecting part (612), and the guiding part (613) are respectively vertically connected to the first rib (631), the second rib (632), and the third rib (633).

7. The self-resetting flameout control mechanism according to claim 6, characterized in that, The first rib (631), the second rib (632), and the third rib (633) and the spring plate (62) are integrally formed.

8. The self-resetting flameout control mechanism according to claim 1, characterized in that, The mounting bracket (2) includes a fixing plate (21), a connecting plate (22) and a positioning plate (23) connected in sequence, and the mounting groove (24) is located at the end of the positioning plate (23).

9. The self-resetting flameout control mechanism according to claim 8, characterized in that, The positioning plate (23) is inclined, the front end of the positioning plate (23) is connected to the connecting plate (22), and the end of the positioning plate (23) is inclined upward.

10. The self-resetting flameout control mechanism according to claim 8, characterized in that, The fixing plate (21), connecting plate (22), and positioning plate (23) are integrally formed.

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