Engine

Abstract

The invention provides an engine. The engine comprises an output component and a speed regulating component, the output component comprises a cylinder head, a cylinder body communicated with the cylinder head, a piston assembly installed in the cylinder body, a crankshaft in transmission connection with the piston assembly and a cam shaft in transmission connection with the crankshaft, and the cam shaft is installed in the cylinder body. The speed regulation component comprises a control mechanism, the control mechanism comprises a mounting plate mounted on the cylinder body, a control handle rotationally mounted on the mounting plate, a shifting fork shaft in transmission connection with the control handle and a shifting fork fixedly mounted on the shifting fork shaft, the shifting fork is connected with an oil injection pump, the oil injection pump is mounted on the cylinder body, and the control handle is rotationally mounted on the mounting plate. And one end of the spring is propped against the cam of the cam shaft. According to the engine, the shifting fork shaft is driven to rotate through the control handle, so that the shifting fork is driven to adjust the oil supply amount of the oil injection pump, throttle control over the engine is achieved, the complexity of the system is simplified, cost is low, and maintenance and replacement are easier.

Description

Technical Field

[0001] The present invention relates to the technical field of internal combustion engines, and in particular to an engine. Background Art

[0002] Equipment such as lawn mowers, snow blowers and tillers usually use internal combustion engines, in which the throttle control system is a critical component that has a significant impact on engine performance. The system controls the amount of fuel supplied by the injection pump by adjusting the position of the throttle adjustment arm, thereby achieving changes in engine speed.

[0003] With the advancement of science and technology and the development of agriculture, engines with electronic shift fork speed control have emerged. This system adjusts the throttle opening through solenoid valves and transmission devices, allowing more precise speed adjustment according to load and working conditions during operation. However, the structure of this system is relatively complex, the cost and maintenance costs are high, and its practicality is subject to certain limitations. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an engine to solve the technical problems in the prior art of adjusting the throttle opening through a solenoid valve and a transmission device, allowing more precise speed adjustment according to the load and working conditions during operation, however, the structure is relatively complex, the cost and maintenance expenses are high, and the practicality is subject to certain limitations.

[0005] The present invention provides an engine, comprising an output component and a speed regulating component;

[0006] The output component includes a cylinder head, a cylinder body connected to the cylinder head, a piston assembly installed in the cylinder body, a crankshaft drivingly connected to the piston assembly, and a camshaft drivingly connected to the crankshaft, wherein the camshaft is installed in the cylinder body;

[0007] The speed regulating component includes a control mechanism, which includes a mounting plate mounted on the cylinder body, a control handle rotatably mounted on the mounting plate, a shift fork shaft transmission-connected to the control handle, and a shift fork fixedly mounted on the shift fork shaft, wherein the shift fork is connected to a fuel injection pump, the fuel injection pump is mounted on the cylinder body, and one end of the fuel injection pump abuts against a cam of the camshaft;

[0008] The control handle drives the shift fork shaft to rotate, so as to drive the shift fork to adjust the oil supply of the fuel injection pump.

[0009] Furthermore, a fixing rod is rotatably mounted on the mounting plate, one of the two opposite ends of the fixing rod passes through the mounting plate and is connected to the control handle, and the other end is connected to a control arm; one end of the fork shaft is rotatably mounted on the mounting plate, and an adjusting arm is fixedly mounted on the fork shaft, and the adjusting arm and the control arm are connected by a tension spring.

[0010] Furthermore, a torsion spring is installed between the mounting plate and the control arm, and the torsion spring is sleeved on the outer surface of the fixing rod.

[0011] Furthermore, an arc-shaped groove is installed on the control handle, and a stud is installed on the mounting plate, and the stud is slidably connected in the arc-shaped groove.

[0012] Furthermore, two limit bolts are installed on the mounting plate, and the two limit bolts are respectively located on both sides of the control handle.

[0013] Furthermore, the speed regulating component also includes an adjusting mechanism, which includes a speed regulating gear transmission connected to the camshaft, two speed regulating flying blocks rotationally connected to the speed regulating gear, a speed regulating shaft installed on the speed regulating gear, and a speed regulating push plate sleeved on the speed regulating shaft, and the speed regulating push plate is connected to the fork shaft.

[0014] Furthermore, an adjusting block is installed on the shift fork shaft, and one end of the speed regulating push plate which is away from the speed regulating gear abuts against the adjusting block.

[0015] Furthermore, the speed regulating component also includes a flameout mechanism, which includes an opening and closing member, a reset member and a transmission member, one end of the opening and closing member passes through the mounting plate and is rotatably connected thereto, the reset member is sleeved on the opening and closing member, and both ends of the reset member are respectively connected to the mounting plate and the transmission member, one end of the transmission member is mounted on the opening and closing member and is located outside the reset member, and the transmission member is rotatably connected to the mounting plate to drive it to abut against the shift fork through the opening and closing member to shut down the fuel injection pump.

[0016] Furthermore, the reset member includes a reset spring, which is sleeved on the opening and closing member, and the two ends of the reset spring are respectively abutted against the mounting plate and the transmission member; the transmission member includes a support arm, which is installed on the opening and closing member and is located on the outside of the reset spring, so as to drive it to abut against the fork through the opening and closing member to close the fuel injection pump.

[0017] Furthermore, the speed regulating component also includes a limiting mechanism, which includes an outer stud and an inner stud, the outer stud is arranged on the engine, and a central through hole is arranged inside the outer stud, the central through hole is elastically connected to the inner stud, and one end of the inner stud abuts against the speed regulating arm to limit the rotation angle of the speed regulating arm.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The engine of the present invention drives the fork shaft to rotate by controlling the handle, thereby driving the fork to adjust the fuel supply of the fuel injection pump, thereby realizing throttle control of the engine, simplifying the complexity of the system, and having a low cost, and being easier to maintain and replace.

[0020] The engine of the present invention, the output component and the speed regulating component are all installed in the cylinder body, so that the structure of the engine is compact, the space occupation and the manufacturing cost are reduced, the engine is lighter and smaller in size as a whole, and the safety hazard of the user during use is also reduced.

[0021] The engine of the present invention realizes automatic adjustment of the engine speed through the adjustment mechanism composed of the speed regulating gear, the speed regulating fly block, the speed regulating shaft and the speed regulating push plate, so as to save more fuel, save energy, have high fuel efficiency, and have low noise and vibration.

[0022] The engine of the present invention, through the flameout mechanism composed of the opening and closing parts, the resetting parts and the transmission parts, not only simplifies the operation process and reduces the operation burden of the user during the continuous use of the diesel engine, but also greatly facilitates the next start of the diesel engine by keeping the opening and closing parts in a normally open state, so that the engine can be quickly restarted in an emergency, thereby meeting the needs of an efficient working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of an engine according to an embodiment of the present invention;

[0024] Figure 2 It is a partial structural schematic diagram of an engine according to an embodiment of the present invention;

[0025] Figure 3 The structure of the speed regulating component in the engine of one embodiment of the present invention is shown in FIG. Figure 1 ;

[0026] Figure 4 The structure of the speed regulating component in the engine of one embodiment of the present invention is shown in FIG. Figure 2 ;

[0027] Figure 5 The structure of the speed regulating component in the engine of one embodiment of the present invention is shown in FIG. Figure 3 ;

[0028] Figure 6 The structure of the regulating mechanism in the engine of one embodiment of the present invention is shown in FIG. Figure 1 ;

[0029] Figure 7 The structure of the regulating mechanism in the engine of one embodiment of the present invention is shown in FIG. Figure 2 ;

[0030] Description of Figure Numbers:

[0031] 11. Cylinder head; 12. Cylinder block; 121. Box body; 122. Box cover; 123. Interface; 13. Crankshaft; 14. Camshaft; 15. Fuel injection pump; 16. Oil pump;

[0032] 21. Mounting plate; 211. Stud; 212. Limit bolt; 22. Control handle; 221. Arc groove; 23. Fork shaft; 24. Fork; 25. Fixing rod; 26. Control arm; 27. Adjusting arm; 28. Tension spring; 29. ​​Torsion spring;

[0033] 31. Speed ​​regulating gear; 32. Speed ​​regulating fly block; 33. Speed ​​regulating shaft; 34. Speed ​​regulating push plate; 35. Adjusting block; 36. Pin hole seat; 37. Pin shaft;

[0034] 41. Opening and closing parts; 42. Resetting parts; 43. Transmission parts;

[0035] 51. External stud; 52. Internal stud.

[0036] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and beneficial effects of the present invention more clearly understood, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] In the description of the present invention, it should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of the present specification are only used to match the contents disclosed in the specification for people familiar with the technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in the present specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of the relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0039] like Figure 1-5As shown, an embodiment of the present invention provides an engine, including an output component and a speed regulating component; the output component includes a cylinder head 11, a cylinder body 12 connected to the cylinder head 11, a piston assembly installed in the cylinder body 12, a crankshaft 13 drivingly connected to the piston assembly, and a camshaft 14 drivingly connected to the crankshaft 13, and the camshaft 14 is installed in the cylinder body 12; the speed regulating component includes a control mechanism, and the control mechanism includes a mounting plate 21 mounted on the cylinder body 12, a control member rotatably mounted on the mounting plate 21 A handle 22, a fork shaft 23 transmission-connected to the control handle 22, and a fork 24 fixedly mounted on the fork shaft 23, wherein the fork 24 is connected to the fuel injection pump 15, and the fuel injection pump 15 is mounted on the cylinder body 12, and one end of the fork 24 abuts against the cam of the camshaft 14; wherein the control handle 22 drives the fork shaft 23 to rotate, so as to drive the fork 24 to adjust the fuel supply of the fuel injection pump 15; specifically, the fuel injection pump 15 includes an adjusting ball head for adjusting the amount of sprayed oil, and the fork 24 is provided with a U-shaped groove for accommodating the adjusting ball head.

[0040] In the embodiment of the present invention, the operator adjusts the speed or power of the engine as needed by rotating the control handle 22 installed on the mounting plate 21. The control handle 22 drives the fork shaft 23 to rotate. When the control handle 22 rotates, it drives the fork shaft 23 to rotate through a mechanical connection (such as a gear, a connecting rod, etc.). The rotation of the fork shaft 23 drives the fork 24 fixed thereon to move. The position change of the fork 24 directly affects the fuel supply amount adjustment mechanism of the fuel injection pump 15. When the fork 24 moves, it pushes or pulls the adjustment mechanism of the fuel injection pump 15, changes the effective stroke (angle) of the plunger of the fuel injection pump 15, and thereby adjusts the fuel supply amount of the fuel injection pump 15. When the fuel supply amount increases, the injection amount of the fuel injection pump 15 increases. The oil pump 15 delivers more fuel to the combustion chamber; when the fuel supply decreases, the amount of fuel delivered by the fuel injection pump 15 decreases, and because one end of the fuel injection pump 15 abuts against the cam of the camshaft 14, the rotation of the camshaft 14 causes the cam thereon to periodically push the plunger of the fuel injection pump 15, thereby realizing the timed injection of the fuel. By adjusting the fuel supply of the fuel injection pump 15, the amount of fuel injected each time can be changed, thereby affecting the output power and speed of the engine. As the fuel supply of the fuel injection pump 15 changes, the combustion efficiency and output power of the engine will also change accordingly. When the fuel supply increases, the engine output power increases and the speed increases; when the fuel supply decreases, the engine output power decreases and the speed decreases.

[0041] Specifically, Figure 1-2 As shown, in the embodiment of the present invention, the cylinder body 12 includes a box body 121 and a box cover 122, and the camshaft 14 is installed in the box body 121. The box body 121 and the box cover 122 are detachably connected together by bolts, so that the structure of the engine is compact and convenient for maintenance and installation. At the same time, the box body 121 is also provided with an interface 123 that can be connected to an external oil tank.

[0042] Specifically, Figure 3-5 As shown, in the embodiment of the present invention, a fixing rod 25 is rotatably mounted on the mounting plate 21, one end of the opposite ends of the fixing rod 25 passes through the mounting plate 21 to be connected to the control handle 22, and the other end is connected to a control arm 26; one end of the fork shaft 23 is rotatably mounted on the mounting plate 21, and an adjusting arm 27 is fixedly mounted on the fork shaft 23, and the adjusting arm 27 and the control arm 26 are connected by a tension spring 28. The operator adjusts the speed or power of the engine as needed by rotating the control arm 26 mounted on the fixing rod 25. The control arm 26 is realized by the handle 22. When the control handle 22 is rotated, the fixed rod 25 rotates accordingly. One end of the fixed rod 25 drives the control handle 22, and the other end drives the control arm 26. The rotation of the fixed rod 25 causes the control arm 26 to move. The position change of the control arm 26 will stretch or compress the tension spring 28. The tension spring 28 is connected between the adjustment arm 27 and the control arm 26. When the control arm 26 moves, the tension spring 28 will provide a reverse tension, so that the adjustment arm 27 rotates following the movement of the control arm 26. The tension of the tension spring 28 can ensure that the adjustment arm 27 rotates in the absence of external force. , the control handle 22 and the fork shaft 23 can automatically return to the initial position (usually the idle position), and because the adjustment arm 27 is fixed on the fork shaft 23, the rotation of the adjustment arm 27 will drive the fork shaft 23 to rotate, and the fork 24 is fixed on the fork shaft 23. With the rotation of the fork shaft 23, the fork 24 will also move. The movement of the fork 24 will push or pull the adjustment mechanism of the injection pump 15, change the effective stroke (angle) of the plunger of the injection pump 15, and thus adjust the fuel supply of the injection pump 15, that is, when the fuel supply increases, the injection pump 15 delivers more fuel to the combustion chamber. When the fuel supply decreases, the amount of fuel delivered by the injection pump 15 decreases. As the fuel supply of the injection pump 15 changes, the combustion efficiency and output power of the engine will also change accordingly; when the fuel supply increases, the engine output power increases and the speed increases; when the fuel supply decreases, the engine output power decreases and the speed decreases; when the control handle 22 is released, the restoring force of the tension spring 28 will return the control handle 22, the fixing rod 25, the control arm 26, the fork shaft 23 and the fork 24 to their initial positions, ensuring that the engine returns to an idle state or other predetermined working states.

[0043] Specifically, Figure 3-5 As shown, in the embodiment of the present invention, a torsion spring 29 is installed between the mounting plate 21 and the control arm 26, and the torsion spring 29 is sleeved on the outer surface of the fixing rod 25. When the control arm 26 moves, the torsion spring 29 provides a reverse torque so that the control arm 26 can stably follow the rotation of the fixing rod 25. The torque of the torsion spring 29 can ensure that when there is no external force, the control handle 22 and the fork shaft 23 can automatically return to the initial position (usually the idle position).

[0044] Specifically, Figure 3-5 As shown, in the embodiment of the present invention, an arc groove 221 is installed on the control handle 22, and a stud 211 is installed on the mounting plate 21. The stud 211 is slidably connected in the arc groove 221. The maximum rotation angle of the control handle 22 is limited by the cooperation between the stud 211 and the arc groove 221, so that the control handle 22 can only move within the range of the arc groove 221, so as to control the rotation angle of the fork shaft 23. At the same time, the control handle 22 can be fixed on the mounting plate 21 in cooperation with a butterfly nut to limit its rotation speed and avoid speed changes caused by misoperation.

[0045] Specifically, Figure 3-5 As shown, in an embodiment of the present invention, two limit bolts 212 are installed on the mounting plate 21, and the two limit bolts 212 are respectively located on both sides of the control handle 22. The two limit bolts 212 are abutted against the control handle 22 to further limit the moving distance of the control handle 22, that is, to limit the rotation angle of the control handle 22 to maintain the rotation speed unchanged.

[0046] like Figure 2 and Figure 6-7 As shown, in an embodiment of the present invention, the speed regulating component also includes an adjusting mechanism, which includes a speed regulating gear 31 transmission-connected to the camshaft 14, two speed regulating flying blocks 32 rotationally connected to the speed regulating gear 31, a speed regulating shaft 33 installed on the speed regulating gear 31, and a speed regulating push plate 34 sleeved on the speed regulating shaft 33, wherein the speed regulating push plate 34 is connected to the fork shaft 23; specifically, an adjusting block 35 is installed on the fork shaft 23, and one end of the speed regulating push plate 34 facing away from the speed regulating gear 31 abuts against the adjusting block 35.

[0047] When the engine speed increases, the speed regulating gear 31 rotates accordingly, and the speed regulating flyweight 32 opens outward due to the action of centrifugal force. The opening action of the speed regulating flyweight 32 is transmitted to the speed regulating push plate 34 through the speed regulating shaft 33. The speed regulating push plate 34 pushes the adjusting block 35 on the fork shaft 23, thereby pushing the fork shaft 23 to rotate. The fork 24 moves with the rotation of the fork shaft 23 to adjust the fuel supply of the injection pump 15, reduce the fuel supply, and thus reduce the engine speed. Conversely, when the engine speed decreases, the speed regulating flyweight 32 retracts inward, and the speed regulating push plate 34 moves in the reverse direction, pushing the adjusting block 35 to move in the reverse direction, increasing the fuel supply and increasing the engine speed, thereby realizing automatic adjustment of the fuel pressure and flow rate with the engine speed to achieve the purpose of speed regulation. Among them, when the speed regulating flyweight 32 opens outward due to the action of centrifugal force, it also drives the lubricating oil to splash into the oil channel of the crankshaft 13 as the flyweight rotates.

[0048] Specifically, Figure 6-7As shown, in the embodiment of the present invention, two groups of pin hole seats 36 are provided on the end face of the speed regulating gear 31, and pin holes are opened on the pin hole seats 36. A pin shaft 37 is installed between the pin hole and the through hole, so that the speed regulating flyweight 32 can be installed on the speed regulating gear 31 for installation. At the same time, the pin hole seats 36 also relatively isolate the speed regulating flyweight 32 from the surrounding engine oil to reduce the blockage of the engine oil to the speed regulating flyweight 32, thereby improving the working stability of the speed regulating mechanism, wherein the pin hole seat 36 and the speed regulating gear 31 are designed as one body to increase the overall strength.

[0049] Specifically, Figure 6-7 As shown, in the embodiment of the present invention, an oil pump 16 is provided on the speed regulating shaft 33 below the speed regulating gear 31, and the regulating mechanism is installed on the tank cover 122 through the oil pump 16. At the same time, the oil amount of the oil pump 16 will also change accordingly with the speed of the engine, thereby realizing automatic adjustment of the oil pressure and flow with the engine speed, so as to achieve the purpose of lubrication and cooling.

[0050] like Figure 3-5 As shown, in an embodiment of the present invention, the speed regulating component also includes a flameout mechanism, which includes an opening and closing member 41, a reset member 42 and a transmission member 43. One end of the opening and closing member 41 passes through the mounting plate 21 and is rotatably connected thereto. The reset member 42 is sleeved on the opening and closing member 41, and both ends of the reset member 42 are respectively connected to the mounting plate 21 and the transmission member 43. One end of the transmission member 43 is mounted on the opening and closing member 41 and is located on the outside of the reset member 42. The transmission member 43 is rotatably connected to the mounting plate 21 so as to drive it to abut against the shift fork 24 through the opening and closing member 41 to close the fuel injection pump 15.

[0051] When the engine is in operation, the operator drives the transmission member 43 by toggling (closing) the opening and closing member 41. The transmission member 43 will rotate on the mounting plate 21 and drive the adjusting ball head to rotate, thereby achieving the purpose of closing the injection pump 15, stopping the fuel delivery of the diesel engine, and stopping the engine. During this process, the transmission member 43 will twist the reset member 42 during movement; after the engine stops, the opening and closing member 41 is released, and the reset member 42 in a twisted state has elastic force, which will drive the opening and closing member 41 to rotate to drive the transmission member 43, so that the opening and closing member 41 is automatically reset to the open state, which not only simplifies the operating process, but also reduces the operating burden of the user during the continuous use of the engine, and by keeping the opening and closing member 41 in a normally open state, it greatly facilitates the next start of the engine, so that the engine can be quickly restarted in an emergency, thereby meeting the needs of an efficient working environment.

[0052] Specifically, Figure 3-5As shown, in the embodiment of the present invention, the reset member 42 includes a reset spring, which is sleeved on the opening and closing member 41, and the two ends of the reset spring are respectively in contact with the mounting plate 21 and the transmission member 43. When the external force disappears, the reset force of the reset spring will return the opening and closing member 41 and the transmission member 43 to their initial positions for the next operation; the transmission member 43 includes a support arm, which is mounted on the opening and closing member 41 and is located on the outside of the reset spring, so as to drive it to abut against the shift fork 24 through the opening and closing member 41 to close the injection pump 15. When the opening and closing member 41 is activated, the support arm will rotate with the opening and closing member 41, and the rotation of the support arm will drive the shift fork 24 to move, so as to close the injection pump 15 and stop the fuel supply, thereby ensuring that the engine returns to the idle state or stops completely.

[0053] like Figure 3-5 As shown, in the embodiment of the present invention, the speed regulating component also includes a limiting mechanism, which includes an outer stud 51 and an inner stud 52, the outer stud 51 is arranged on the engine, and a central through hole is arranged inside the outer stud 51, the central through hole is elastically connected to the inner stud 52, one end of the inner stud 52 abuts against the speed regulating arm 27 to limit the rotation angle of the speed regulating arm 27, when the regulating arm 27 rotates to a distance close to the maximum set angle, the regulating arm will contact the inner stud 52, the inner stud 52 abuts against the end of the regulating arm 27 away from the tension spring 28 through the elastic element, providing additional resistance to prevent the regulating arm 27 from continuing to rotate, the elastic force of the elastic element enables the inner stud 52 to smoothly abut against the regulating arm 27, avoiding the impact and damage that may be caused by the hard limit, and as the regulating arm 27 continues to try to rotate, the elastic element will be further compressed to increase the resistance until the maximum set angle is reached, so as to automatically adjust the engine speed fluctuation and minimize the speed fluctuation range.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than as a barrier. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An engine, characterized in that: Including output components and speed regulating components; The output component comprises a cylinder head (11), a cylinder body (12) connected to the cylinder head (11), a piston assembly installed in the cylinder body (12), a crankshaft (13) drivingly connected to the piston assembly, and a camshaft (14) drivingly connected to the crankshaft (13), wherein the camshaft (14) is installed in the cylinder body (12); The speed regulating component comprises a control mechanism, the control mechanism comprising a mounting plate (21) mounted on the cylinder body (12), a control handle (22) rotatably mounted on the mounting plate (21), a shift fork shaft (23) transmission-connected to the control handle (22), and a shift fork (24) fixedly mounted on the shift fork shaft (23), the shift fork (24) being connected to a fuel injection pump (15), the fuel injection pump (15) being mounted on the cylinder body (12), and one end of which abuts against a cam of the camshaft (14); The control handle (22) drives the shift fork shaft (23) to rotate, thereby driving the shift fork (24) to adjust the oil supply of the fuel injection pump (15).

2. An engine according to claim 1, characterized in that: A fixing rod (25) is rotatably mounted on the mounting plate (21); one end of the fixing rod (25) passes through the mounting plate (21) to be connected to the control handle (22), and the other end is connected to a control arm (26); one end of the shift fork shaft (23) is rotatably mounted on the mounting plate (21), and an adjusting arm (27) is fixedly mounted on the shift fork shaft (23); the adjusting arm (27) and the control arm (26) are connected via a tension spring (28).

3. An engine according to claim 2, characterized in that: A torsion spring (29) is installed between the mounting plate (21) and the control arm (26), and the torsion spring (29) is sleeved on the outer surface of the fixing rod (25).

4. An engine according to claim 2, characterized in that: The control handle (22) is provided with an arc-shaped groove (221), and the mounting plate (21) is provided with a stud (211), wherein the stud (211) is slidably connected in the arc-shaped groove (221).

5. An engine according to claim 2, characterized in that: Two limiting bolts (212) are installed on the mounting plate (21), and the two limiting bolts (212) are respectively located on two sides of the control handle (22).

6. An engine according to claim 1, characterized in that: The speed regulating component also includes an adjusting mechanism, which includes a speed regulating gear (31) drivingly connected to the camshaft (14), two speed regulating flying blocks (32) rotatably connected to the speed regulating gear (31), a speed regulating shaft (33) mounted on the speed regulating gear (31), and a speed regulating push plate (34) sleeved on the speed regulating shaft (33), wherein the speed regulating push plate (34) is connected to the shift fork shaft (23).

7. An engine according to claim 6, characterized in that: An adjusting block (35) is mounted on the shift fork shaft (23), and one end of the speed regulating push plate (34) that is away from the speed regulating gear (31) abuts against the adjusting block (35).

8. An engine according to claim 1, characterized in that: The speed regulating component also includes a flameout mechanism, which includes an opening and closing member (41), a reset member (42) and a transmission member (43). One end of the opening and closing member (41) passes through the mounting plate (21) and is rotatably connected thereto. The reset member (42) is sleeved on the opening and closing member (41), and two ends of the reset member (42) are respectively connected to the mounting plate (21) and the transmission member (43). One end of the transmission member (43) is mounted on the opening and closing member (41) and is located outside the reset member (42). The transmission member (43) is rotatably connected to the mounting plate (21) so as to drive the opening and closing member (41) to abut against the shift fork (24) so ​​as to shut down the fuel injection pump (15).

9. An engine according to claim 8, characterized in that: The reset member (42) comprises a reset spring, the reset spring is sleeved on the opening and closing member (41), and two ends of the reset spring are respectively in contact with the mounting plate (21) and the transmission member (43); the transmission member (43) comprises a support arm, the support arm is mounted on the opening and closing member (41) and is located on the outside of the reset spring, so as to drive the support arm to contact the shift fork (24) through the opening and closing member (41) to close the fuel injection pump (15).

10. An engine according to claim 1, characterized in that: The speed regulating component further comprises a limiting mechanism, which comprises an outer stud (51) and an inner stud (52). The outer stud (51) is arranged on the engine, and a central through hole is arranged inside the outer stud (51). The central through hole is elastically connected to the inner stud (52). One end of the inner stud (52) abuts against the speed regulating arm (27) to limit the rotation angle of the speed regulating arm (27).

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