A flywheel accessory drive structure for a diesel engine

Abstract

The present invention discloses a flywheel accessory drive structure of a diesel engine, including a flywheel arranged in a cabin and a follower wheel connected to an auxiliary component by transmission, and also includes a coupling mechanism, which includes a plurality of tension wheels arranged in a circumferential array along the flywheel, and a composite transmission belt is sleeved on the plurality of tension wheels, the follower wheel and the flywheel, and the composite transmission belt is assembled in the following two positions: the first position: the flywheel rotates slowly or stops. Specifically, it relates to a flywheel drive structure. During the ignition of the flywheel, the invention will be driven by an electric starter and be in a state of slow rotation. The composite transmission belt will be in the first position to decouple the flywheel. The electric starter drives the flywheel alone, and will not drive the composite transmission belt, thereby reducing the burden on the electric starter. When the flywheel rotates rapidly with the crankshaft, the composite transmission belt will couple the flywheel to drive the follower wheel to rotate.

Description

Technical Field

[0001] The invention relates to the technical field of flywheel drive, and in particular to a flywheel accessory drive structure of a diesel engine. Background Art

[0002] The crankshaft-flywheel assembly is a key component in the engine. It mainly converts the reciprocating motion of the piston into the rotational motion of the crankshaft. The flywheel plays a role in stabilizing operation and storing energy.

[0003] According to patent No. CN110513268B, publication (announcement) date: 2024-06-21, a driving structure of an air compressor on a gasoline engine is disclosed, including an air compressor and a supporting and adjusting bracket, the compressor pulley is driven to rotate by the crankshaft pulley of the gasoline engine; the compressor air inlet is connected to the pipeline behind the air filter of the gasoline engine, the compressor air outlet is connected to the vehicle pneumatic brake system, the compressor water inlet is connected to the gasoline engine warm air water intake, the compressor water outlet is connected to the gasoline engine warm air return water port, the compressor oil inlet is connected to the gasoline engine oil pressure port, and the compressor oil return port is connected to the gasoline engine oil pan; the driving structure solves the problem of mismatch between the air compressor speed and the gasoline engine speed, and at the same time solves the lubrication and cooling problems of the air compressor, providing a feasible solution for light trucks equipped with gasoline engines to use traditional air compressors.

[0004] In the prior art including the above-mentioned patent, the flywheel is coupled to the water pump, air compressor, oil pump and other components through a conveyor belt to provide power for the above-mentioned components. The flywheel needs to be electronically ignited before the engine is running. At this time, the flywheel is driven to rotate by the electric starter for ignition. However, the flywheel is always coupled to many components through the conveyor belt, which increases the driving burden of the electric starter. After long-term use, it is easy to be overloaded and unable to perform the ignition procedure normally. Summary of the invention

[0005] The purpose of the present invention is to provide a flywheel accessory drive structure for a diesel engine, aiming to solve the problem that the flywheel is always coupled with numerous components through a conveyor belt, and the electric starter is overloaded.

[0006] In order to achieve the above-mentioned object, the present invention provides the following technical solution: a flywheel accessory drive structure of a diesel engine, comprising a flywheel arranged in a cabin and a follower drive wheel connected to an auxiliary component in a transmission manner, and also comprising a coupling mechanism, which comprises a plurality of tensioning wheels arranged in a circumferential array along the flywheel, a composite transmission belt is sleeved on the plurality of tensioning wheels, the follower drive wheel and the flywheel, and the composite transmission belt is assembled at the following two stations:

[0007] First station: the flywheel rotates slowly or stops, so as to drive the plurality of tension wheels to stretch outward along the flywheel, so that the composite transmission belt is decoupled from the flywheel;

[0008] The second working station: the flywheel rotates rapidly to drive the plurality of tension wheels to approach the flywheel, so that the composite transmission belt is coupled to the flywheel.

[0009] Preferably, a convex sliding portion and a concave sliding portion are respectively provided at both ends of the composite transmission belt, and the convex sliding portion and the concave sliding portion are slidably connected to each other, so that the composite transmission belt can be extended and retracted as the tensioning wheel moves.

[0010] Preferably, the convex sliding portion and the concave sliding portion are unlocked when the composite transmission belt is switched to the first station, and are locked when the composite transmission belt is rotated and switched to the second station.

[0011] Preferably, the flywheel is provided with oblique coupling teeth in a circumferential array, the composite transmission belt is provided with an inner core belt, and the inner core belt is provided with oblique belt teeth coupled with the oblique coupling teeth in a linear array.

[0012] Preferably, the concave sliding portion is symmetrically provided with check teeth, the inner core belt is provided with flip teeth on the convex sliding portion, and the inner core belt is driven to move with the composite transmission belt to drive the flip teeth to flip and fit the check teeth for locking.

[0013] Preferably, a trapezoidal bar is provided on the convex sliding portion, and the convex sliding portion slides along the concave sliding portion as the tensioning wheel pushes against it, so that the trapezoidal bar pushes the concave sliding portion outward, so that the check tooth is away from the flip tooth.

[0014] Preferably, the coupling mechanism further comprises a bracket, the tensioning wheel is movably arranged on the bracket, a centrifugal plate is slidably connected to the flywheel, and the centrifugal plate rotates and slides with the flywheel to drive the tensioning wheel close to the flywheel.

[0015] Preferably, a push plate that fits the centrifugal plate is slidably connected to the bracket, the tensioning wheel is rotatably connected to the rotating sleeve, a second spring is arranged between the rotating sleeve and the bracket, and a pulling rope is arranged between the push plate and the rotating sleeve.

[0016] Preferably, the convex sliding portion is provided with a guide plate slidably connected to the concave sliding portion, and a first spring is provided between the guide plate and the concave sliding portion.

[0017] Preferably, a centrifugal overload ring is provided on the follower drive wheel, and the centrifugal overload ring is coupled or decoupled with the oblique belt teeth.

[0018] In the above technical scheme, a flywheel accessory drive structure of a diesel engine provided by the present invention has the following beneficial effects: during the ignition of the flywheel, it will be driven by the electric starter and be in a slow rotation state, the composite transmission belt will be in the first position to decouple the flywheel, the electric starter drives the flywheel alone, and will not drive the composite transmission belt, thereby reducing the burden on the electric starter, and when the flywheel rotates rapidly with the crankshaft, the composite transmission belt will couple the flywheel to drive the drive wheel to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1 An overall schematic diagram provided for an embodiment of the present invention;

[0021] Figure 2 An overall explosion diagram provided for an embodiment of the present invention;

[0022] Figure 3 for Figure 2 A in the middle is an enlarged schematic diagram;

[0023] Figure 4 An overall cross-sectional schematic diagram provided for an embodiment of the present invention;

[0024] Figure 5 for Figure 4 Middle B is an enlarged schematic diagram;

[0025] Figure 6 for Figure 2 Middle C shows an enlarged schematic diagram;

[0026] Figure 7 An exploded schematic diagram of a coupling and cutting mechanism provided in an embodiment of the present invention;

[0027] Figure 8 A schematic cross-sectional view of a composite transmission belt provided by an embodiment of the present invention;

[0028] Fig. 9 A cross-sectional schematic diagram of a coupling and cutting mechanism provided in an embodiment of the present invention.

[0029] Description of reference numerals:

[0030] 1. flywheel; 11. oblique coupling teeth; 12. slide frame; 2. composite transmission belt; 201. convex sliding part; 2011. movable groove; 2012. trapezoidal bar; 202. concave sliding part; 2021. backstop teeth; 21. inner core belt; 211. oblique belt teeth; 212. flip teeth; 22. guide plate; 221. first spring; 3. coupling and cutting mechanism; 30. bracket; 31. tensioning wheel; 32. rotating sleeve; 321. second spring; 33. push plate; 331. pulling rope; 34. centrifugal plate; 341. third spring; 4. follow-up drive wheel; 41. centrifugal overload ring; 411. slide groove; 42. outer arc block; 421. fourth spring. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0032] like Figure 1-9 As shown, a flywheel accessory drive structure of a diesel engine includes a flywheel 1 arranged in a cabin and a follower drive wheel 4 drivingly connected to an auxiliary component, and also includes a coupling mechanism 3, which includes a plurality of tensioning wheels 31 arranged in a circumferential array along the flywheel 1, and a composite transmission belt 2 is sleeved on the plurality of tensioning wheels 31, the follower drive wheel 4 and the flywheel 1, and the composite transmission belt 2 is assembled at the following two stations:

[0033] First station: the flywheel 1 rotates slowly or stops, so as to drive the plurality of tension wheels 31 to stretch outward along the flywheel 1, so that the composite transmission belt 2 is decoupled from the flywheel 1;

[0034] Second workstation: The flywheel 1 rotates rapidly to drive multiple tension wheels 31 to approach the flywheel 1 so that the composite transmission belt 2 is coupled to the flywheel 1 .

[0035] Specifically, the tensioning wheels 31 are arranged in an array along the circumference of the flywheel 1. When the engine is not started, the flywheel 1 stops with the crankshaft. At this time, multiple tensioning wheels 31 are stretched outward along the flywheel 1 to stretch the composite transmission belt 2 to expand, so that the composite transmission belt 2 is separated from the flywheel 1 for decoupling. At this time, when ignition is performed, the composite transmission belt 2 is in the first position, and the gear on the electric starter will extend out of the coupled flywheel 1, driving the flywheel 1 to rotate slowly for ignition, and the gear will automatically retract after ignition. At this time, the crankshaft is driven to rotate, causing the flywheel 1 to gradually rotate rapidly, causing the composite transmission belt 2 to switch to the second position, driving the tensioning wheel 31 close to the flywheel 1, so that the composite transmission belt 2 is coupled to the flywheel 1, thereby driving the follower drive wheel 4 to rotate, and driving the remaining auxiliary components to rotate, thereby reducing the burden on the electric starter.

[0036] Furthermore, the auxiliary components may be components that need to be driven, such as a water pump, an air compressor, and an oil pump. The auxiliary components are connected to the follow-up drive wheel 4 through a coupling to transmit power.

[0037] In the above technical solution, during the ignition of the flywheel 1, it will be driven by the electric starter and will be in a slow rotation state. The composite transmission belt 2 will be in the first position to decouple the flywheel 1. The electric starter will drive the flywheel 1 alone without driving the composite transmission belt 2, thereby reducing the burden on the electric starter. When the flywheel 1 rotates rapidly with the crankshaft, the composite transmission belt 2 will couple with the flywheel 1 to drive the drive wheel 4 to rotate.

[0038] As an embodiment provided by the present invention, a convex sliding portion 201 and a concave sliding portion 202 are respectively provided at both ends of the composite transmission belt 2, and the convex sliding portion 201 and the concave sliding portion 202 are slidably connected to each other so that the composite transmission belt 2 can be extended and retracted as the tensioning wheel 31 moves.

[0039] Specifically, the composite transmission belt 2 is a long strip. Figure 6 As shown, the two ends of the composite transmission belt 2 are respectively a convex sliding portion 201 and a concave sliding portion 202. The convex sliding portion 201 and the concave sliding portion 202 can slide to extend the sleeve range of the composite transmission belt 2, thereby adapting to the movement of the tensioning wheel 31, realizing the switching between the two stations of the composite transmission belt 2, and extending and retracting it.

[0040] During ignition, the composite transmission belt 2 is in the first working position, at which point the convex sliding portion 201 and the concave sliding portion 202 slide and stretch against each other, and the gear on the electric starter will extend out of the coupled flywheel 1, driving the flywheel 1 to rotate slowly for ignition, and after ignition, the gear will automatically retract, and the crankshaft is driven to rotate, causing the flywheel 1 to gradually rotate rapidly, causing the composite transmission belt 2 to switch to the second working position, driving the tensioning wheel 31 to approach the flywheel 1, and the convex sliding portion 201 and the concave sliding portion 202 slide close to each other, shortening the composite transmission belt 2 so that the composite transmission belt 2 is coupled to the flywheel 1.

[0041] As an embodiment provided by the present invention, the convex sliding portion 201 and the concave sliding portion 202 are unlocked when the composite transmission belt 2 is switched to the first station, and are locked when the composite transmission belt 2 is rotated and switched to the second station.

[0042] Specifically, when the flywheel 1 stops rotating, the convex sliding portion 201 and the concave sliding portion 202 will be unlocked because the flywheel 1 stops rotating, so that the tensioning wheel 31 will expand outward along the flywheel 1 to open the unlocked composite transmission belt 2 to achieve the switching of the first workstation. When the flywheel 1 rotates rapidly, the tensioning wheel 31 will gradually approach the flywheel 1. As the tensioning wheel 31 approaches, the composite transmission belt 2 will shrink and fit the flywheel 1 for coupling. After coupling, the convex sliding portion 201 and the concave sliding portion 202 are locked to ensure smooth transmission.

[0043] The stopped flywheel 1 stretches the tensioning wheel 31 outward. At this time, the composite transmission belt 2 is in the first position, the convex sliding portion 201 and the concave sliding portion 202 are in an unlocked state, and slide and stretch against each other. When ignition is performed, the gear on the electric starter will extend out to couple with the flywheel 1, driving the flywheel 1 to rotate slowly for ignition, and the gear will automatically retract after ignition. At this time, the crankshaft is driven to rotate, causing the flywheel 1 to gradually rotate rapidly, causing the composite transmission belt 2 to switch to the second position, driving the tensioning wheel 31 close to the flywheel 1, and the convex sliding portion 201 and the concave sliding portion 202 slide close to each other, shortening the composite transmission belt 2 so that the composite transmission belt 2 is coupled to the flywheel 1. After coupling, the convex sliding portion 201 and the concave sliding portion 202 are locked.

[0044] As an embodiment provided by the present invention, the flywheel 1 is provided with oblique coupling teeth 11 in a circumferential array, the composite transmission belt 2 is provided with an inner core belt 21, and the inner core belt 21 is provided with oblique belt teeth 211 coupled with the oblique coupling teeth 11 in a linear array.

[0045] Specifically, the inner core belt 21 and the composite transmission belt 2 are both made of rubber, the hardness of the inner core belt 21 is greater than that of the composite transmission belt 2, the flywheel 1 is coupled to the oblique belt teeth 211 on the inner core belt 21 through the oblique coupling teeth 11, and the oblique coupling teeth 11 and the oblique belt teeth 211 are both provided with inclined surfaces, and the two inclined surfaces are in contact with each other to avoid slipping.

[0046] As an embodiment provided by the present invention, the concave sliding portion 202 is symmetrically provided with check teeth 2021, and the inner core belt 21 is located on the convex sliding portion 201 and is provided with flip teeth 212. The inner core belt 21 is driven to move with the composite transmission belt 2 to drive the flip teeth 212 to flip and fit the check teeth 2021 for locking.

[0047] Specifically, the concave sliding portion 202 is symmetrically provided with check teeth 2021, the convex sliding portion 201 is provided with a movable groove 2011, and the flip tooth 212 passes through the movable groove 2011 and extends out of the convex sliding portion 201. When the flywheel 1 is coupled, the flywheel 1 will only couple with the inner core belt 21, so that the inner core belt 21 is driven to drive the composite transmission belt 2 to move, and the hardness of the composite transmission belt 2 is less than that of the inner core belt 21, so that the inner core belt 21 will drive the partial deformation of the composite transmission belt 2, so that the composite transmission belt 2 is restricted by the driving wheel 4 and deforms lagging, causing the flip tooth 212 to move outward along the movable groove 201, so that the flip tooth 212 can fit the check tooth 2021 for locking, and the check tooth 2021 and the flip tooth 212 are both provided with inclined surfaces, and the two inclined surfaces pull the two ends of the concave sliding portion 202 closer to fit the convex sliding portion 201 for secondary locking, thereby maintaining the contraction state of the composite transmission belt 2, maintaining coupling and transmitting power.

[0048] The stopped flywheel 1 causes the tensioning wheel 31 to stretch outward. At this time, the composite transmission belt 2 is in the first position, and the convex sliding part 201 and the concave sliding part 202 are in an unlocked state, sliding and stretching against each other. When ignition is performed, the gear on the electric starter will extend out to couple with the flywheel 1, driving the flywheel 1 to rotate slowly for ignition, and the gear will automatically retract after ignition. At this time, the crankshaft is driven to rotate, causing the flywheel 1 to gradually rotate rapidly, causing the composite transmission belt 2 to switch to the second position, driving the tensioning wheel 31 to approach the flywheel 1, and the convex sliding part 201 and the concave sliding part 202 slide close to each other, shortening the composite transmission belt 2 so that the oblique belt teeth 211 on the composite transmission belt 2 are coupled with the oblique coupling teeth 11 on the flywheel 1, and the inner core belt 21 will drive the composite transmission belt 2 to rotate. At this time, the flip tooth 212 moves outward along the movable groove 2011, so that the flip tooth 212 can fit the backstop tooth 2021 for locking.

[0049] As an embodiment provided by the present invention, a trapezoidal bar 2012 is arranged on the convex sliding portion 201, and the convex sliding portion 201 slides along the concave sliding portion 202 as the tensioning wheel 31 pushes, so that the trapezoidal bar 2012 pushes the concave sliding portion 202 outward, so that the check tooth 2021 is away from the flip tooth 212.

[0050] Specifically, the two inner walls of the concave sliding portion 202 are in an inclined state, corresponding to the trapezoidal bar 2012 on the convex sliding portion 201. When the convex sliding portion 201 extends along the concave sliding portion 202, the two inner walls of the concave sliding portion 202 are pushed outward by the large ends of the trapezoidal bar 2012 to ensure that the check tooth 2021 does not contact the flip tooth 212 when the inner core belt 21 is decoupled from the flywheel 1, thereby ensuring that the locking and unlocking of the convex sliding portion 201 and the concave sliding portion 202 operate normally at the first and second workstations.

[0051] The stopped flywheel 1 stretches the tensioning wheel 31 outwards. At this time, the composite transmission belt 2 is in the first position. The trapezoidal bar 2012 stretches the concave sliding portion 202 outwards as the tensioning wheel 31 pushes against it, so as to maintain the convex sliding portion 201 and the concave sliding portion 202 in an unlocked state, and slide and stretch each other. When igniting, the gear on the electric starter will extend out of the coupling flywheel 1, driving the flywheel 1 to rotate slowly for ignition, and the gear will automatically retract after ignition. At this time, the crankshaft is driven to rotate, so that the flywheel 1 The wheel 1 gradually rotates rapidly, so that the composite transmission belt 2 switches to the second working position, driving the tensioning wheel 31 close to the flywheel 1, and the convex sliding part 201 and the concave sliding part 202 slide close to each other, shortening the composite transmission belt 2, so that the oblique belt teeth 211 on the composite transmission belt 2 are coupled with the oblique coupling teeth 11 on the flywheel 1, and the inner core belt 21 will drive the composite transmission belt 2 to rotate. At this time, the flip tooth 212 moves outward along the movable groove 2011, so that the flip tooth 212 can fit the reverse stop tooth 2021 for locking.

[0052] As an embodiment provided by the present invention, the coupling mechanism 3 further includes a bracket 30, a tensioning wheel 31 is movably arranged on the bracket 30, a centrifugal plate 34 is slidably connected to the flywheel 1, and the centrifugal plate 34 rotates and slides with the flywheel 1 to drive the tensioning wheel 31 to approach the flywheel 1;

[0053] A push plate 33 that fits the centrifugal plate 34 is slidably connected to the bracket 30, the tension wheel 31 is rotatably connected to the rotating sleeve 32, a second spring 321 is arranged between the rotating sleeve 32 and the bracket 30, and a pulling rope 331 is arranged between the push plate 33 and the rotating sleeve 32.

[0054] Specifically, a guide groove is opened on the bracket 30, and the rotating sleeve 32 is rotatably connected in the guide groove. A second spring 321 is arranged between the rotating sleeve 32 and the guide groove, and a slide frame 12 is arranged on the flywheel 1. The centrifugal plate 34 is slidably connected to the slide frame 12, and a third spring 341 is arranged between the two. The pulling rope 331 is slidably connected to the cable groove in the guide groove. When the flywheel 1 rotates, the centrifugal plate 34 will overcome the pushing force of the second spring 321 and the third spring 341 as the centrifugal force of the flywheel 1 increases, thereby pushing the pushing plate 33 to move, so that the rotating sleeve 32 drives the tensioning wheel 31 to approach and move away from the flywheel 1, thereby realizing the station switching of the composite transmission belt 2.

[0055] The flywheel 1 stops rotating, the centrifugal force disappears, the second spring 321 pushes the rotating sleeve 32 to move the tension wheel 31 outward, and the composite transmission belt 2 is in the first position. The trapezoidal bar 2012 will push the concave sliding part 202 outward with the push of the tension wheel 31 to maintain the convex sliding part 201 and the concave sliding part 202 in an unlocked state, and slide and stretch each other. When ignition is performed, the gear on the electric starter will extend out of the coupling flywheel 1, driving the flywheel 1 to rotate slowly for ignition, and the gear will automatically retract after ignition. At this time, the crankshaft is driven to rotate, causing the flywheel 1 to gradually rotate rapidly. At this time, the centrifugal plate 3 As the centrifugal force of the flywheel 1 increases, the push force of the second spring 321 and the third spring 341 is overcome, thereby pushing the push plate 33 to move, so that the composite transmission belt 2 is switched to the second position, driving the tensioning wheel 31 close to the flywheel 1, and the convex sliding portion 201 and the concave sliding portion 202 slide close to each other, shortening the composite transmission belt 2, so that the oblique belt teeth 211 on the composite transmission belt 2 are coupled with the oblique coupling teeth 11 on the flywheel 1, and the inner core belt 21 drives the composite transmission belt 2 to rotate. At this time, the flip tooth 212 moves outward along the movable groove 2011, so that the flip tooth 212 can fit the backstop tooth 2021 for locking.

[0056] As an embodiment provided by the present invention, a guide plate 22 slidably connected to the concave sliding portion 202 is provided on the convex sliding portion 201 , and a first spring 221 is provided between the guide plate 22 and the concave sliding portion 202 .

[0057] Specifically, the first spring 221 is used to pull the convex sliding portion 201 to slide along the concave sliding portion 202 when the tensioning wheel 31 approaches the flywheel 1, so as to contract the composite transmission belt 2, and when the convex sliding portion 201 and the concave sliding portion 202 slide, the guide plate 22 plays a guiding role.

[0058] As the best embodiment provided by the present invention, a centrifugal overload ring 41 is provided on the follower drive wheel 4 , and the centrifugal overload ring 41 is coupled or decoupled with the oblique belt teeth 211 .

[0059] Specifically, a slide groove 411 is provided on the centrifugal overload ring 41, and an outer arc block 42 is slidably connected to the slide groove 411. A fourth spring 421 is provided between the outer arc block 42 and the slide groove 411. When the flywheel 1 rotates rapidly with the operation of the crankshaft, the outer arc block 42 is insufficient to generate the centrifugal force to overcome the fourth spring 421. At this time, the oblique belt teeth 211 will be stuck in the slide groove 411 to drive the drive wheel 4 to rotate. When the crankshaft accelerates significantly after refueling, the flywheel 1 is further accelerated, so that the outer arc block 42 overcomes the pulling force of the fourth spring 421 and slides to fill the slide groove 411. At this time, the oblique belt teeth 211 fit the outer arc block 42, so that the oblique belt teeth 211 can fit the outer arc block 42 and the outer wall of the centrifugal overload ring 41 to slide, so as to play a role of overload protection and prevent the flywheel 1 from rotating too fast and affecting the normal operation of auxiliary components.

[0060] When the flywheel 1 stops rotating, the centrifugal force disappears, and the second spring 321 pushes the rotating sleeve 32 to move the tensioning wheel 31 to stretch outward. At this time, the composite transmission belt 2 is in the first position, and the trapezoidal bar 2012 will stretch the concave sliding portion 202 outward as the tensioning wheel 31 pushes, so as to maintain the convex sliding portion 201 and the concave sliding portion 202 in an unlocked state, and slide and stretch each other. When igniting, the gear on the electric starter will extend out of the coupling flywheel 1, driving the flywheel 1 to rotate slowly for ignition, and the gear will automatically retract after ignition. At this time, the crankshaft is driven to rotate, causing the flywheel 1 to gradually rotate faster. At this time, the centrifugal plate 34 will overcome the pushing force of the second spring 321 and the third spring 341 as the centrifugal force of the flywheel 1 increases, thereby pushing the pushing plate 33 to move, so that The composite transmission belt 2 is switched to the second workstation, driving the tensioning wheel 31 close to the flywheel 1, and the convex sliding part 201 and the concave sliding part 202 slide close to each other, shortening the composite transmission belt 2, so that the oblique belt teeth 211 on the composite transmission belt 2 are coupled to the oblique coupling teeth 11 on the flywheel 1, and the inner core belt 21 will drive the composite transmission belt 2 to rotate. At this time, the flip tooth 212 moves outward along the movable groove 2011, so that the flip tooth 212 can fit the check tooth 2021 for locking. When the flywheel 1 is further accelerated, the outer arc block 42 overcomes the pulling force of the fourth spring 421 and slides to fill the slide groove 41. At this time, the oblique belt teeth 211 fit the outer arc block 42, so that the oblique belt teeth 211 can fit the outer arc block 42 and the outer wall of the centrifugal overload ring 41 to slide, so as to play a role in overload protection.

[0061] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A flywheel accessory drive structure for a diesel engine, comprising a flywheel (1) arranged in a cabin and a follower drive wheel (4) drivingly connected to an auxiliary component, characterized in that: It also comprises a coupling mechanism (3), which comprises a plurality of tensioning wheels (31) arranged in a circumferential array along the flywheel (1), a composite transmission belt (2) being sleeved on the plurality of tensioning wheels (31), the follower drive wheel (4) and the flywheel (1), and the composite transmission belt (2) being assembled at the following two stations: At the first workstation, the flywheel (1) is rotated slowly or stopped to drive the plurality of tension wheels (31) to be stretched outward along the flywheel (1), so that the composite transmission belt (2) is decoupled from the flywheel (1); Second workstation: the flywheel (1) rotates rapidly to drive the plurality of tension wheels (31) close to the flywheel (1), so that the composite transmission belt (2) is coupled to the flywheel (1); The composite transmission belt (2) is provided with a convex sliding portion (201) and a concave sliding portion (202) at both ends, respectively, and the convex sliding portion (201) and the concave sliding portion (202) are slidably connected to each other, so that the composite transmission belt (2) can be extended and retracted as the tensioning wheel (31) moves; The convex sliding portion (201) and the concave sliding portion (202) are unlocked when the composite transmission belt (2) switches to the first working position, and are locked when the composite transmission belt (2) rotates and switches to the second working position; The coupling mechanism (3) further comprises a bracket (30), the tension wheel (31) is movably arranged on the bracket (30), a centrifugal plate (34) is slidably connected to the flywheel (1), and the centrifugal plate (34) rotates and slides with the flywheel (1) to drive the tension wheel (31) to approach the flywheel (1); A push plate (33) that fits the centrifugal plate (34) is slidably connected to the bracket (30), the tension wheel (31) is rotatably connected to the rotating sleeve (32), a second spring (321) is provided between the rotating sleeve (32) and the bracket (30), and a pulling rope (331) is provided between the push plate (33) and the rotating sleeve (32).

2. A flywheel accessory drive structure for a diesel engine according to claim 1, characterized in that: The flywheel (1) is provided with oblique coupling teeth (11) in a circumferential array, the composite transmission belt (2) is provided with an inner core belt (21), and the inner core belt (21) is provided with oblique belt teeth (211) coupled to the oblique coupling teeth (11) in a linear array.

3. A flywheel accessory drive structure of a diesel engine according to claim 2, characterized in that: The concave sliding portion (202) is symmetrically provided with backstop teeth (2021), and the inner core belt (21) is provided with flipping teeth (212) on the convex sliding portion (201); the inner core belt (21) is driven to move along with the composite transmission belt (2) to drive the flipping teeth (212) to flip and fit the backstop teeth (221) for locking.

4. A flywheel accessory drive structure for a diesel engine according to claim 3, characterized in that: The convex sliding portion (201) is provided with a trapezoidal bar (2012), and the convex sliding portion (201) is pushed and slid along the concave sliding portion (202) by the tensioning wheel (31), so that the trapezoidal bar (2012) pushes the concave sliding portion (202) outward, so that the backstop tooth (2021) is away from the flip tooth (212).

5. A flywheel accessory drive structure for a diesel engine according to claim 1, characterized in that: The convex sliding portion (201) is provided with a guide plate (22) slidably connected to the concave sliding portion (202), and a first spring (221) is provided between the guide plate (22) and the concave sliding portion (202).

6. A flywheel accessory drive structure for a diesel engine according to claim 2, characterized in that: The follower drive wheel (4) is provided with a centrifugal overload ring (41), and the centrifugal overload ring (41) is coupled or decoupled with the oblique belt teeth (211).

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