Valve adjustment auxiliary device

Abstract

This invention relates to the field of valve adjustment technology, specifically disclosing a valve adjustment auxiliary device mounted on the flywheel of an engine. The device includes a drive assembly and a dial assembly. The drive assembly, mounted on the flywheel, includes an input shaft coaxial with the flywheel. One rotation of the input shaft causes the flywheel to drive the engine to complete one working cycle. The dial assembly includes a stationary dial, a moving dial, and a driver. The driver rotates coaxially with the stationary dial. The moving dial is coaxially mounted on the driver and has two states: connected and disconnected. The stationary dial has a pointer arranged radially and is fixed relative to the engine so that the pointer is at the 12 o'clock position. The moving dial has multiple graduations at equal angles around its axis, the number of graduations equal to the number of cylinders in the engine. This valve adjustment auxiliary device can precisely adjust each piston cylinder to the compression top dead center, thereby reducing deviations during valve clearance adjustment.

Description

TECHNICAL FIELD

[0001] The present application relates to the valve adjustment field, and particularly relates to a valve adjustment auxiliary device. BACKGROUND

[0002] In order to ensure the valve to be tightly closed, an appropriate gap is usually left between the valve rod end and the valve driving part when the engine is assembled in cold state, which is called valve gap. The valve gap has a great influence on the engine. If the gap is too small, the engine will not be tightly closed in hot state, which leads to power reduction or even valve burnout. If the valve gap is too large, it will cause the impact sound between the driving parts and between the valve and the valve seat, and will also aggravate the wear and tear and other faults. Therefore, whether the valve gap value is accurately adjusted has a great influence on the engine.

[0003] Generally, a mark hole is arranged on the flywheel of the engine. When the flywheel is rotated and the mark hole of the flywheel is located at the top dead center, the first piston cylinder of the engine is also at the compression top dead center. According to the ignition sequence of the engine, the flywheel is rotated by different angles to adjust the valves of each cylinder according to the requirements, until all the intake valves and exhaust valves of all the cylinders are adjusted.

[0004] However, the biggest problem in the current adjustment method is that when the operator rotates the flywheel, the angle of the flywheel rotation cannot be accurately controlled, which leads to a large deviation in the valve adjustment process. SUMMARY

[0005] The present application aims to provide a valve adjustment auxiliary device to solve the problem that when the operator rotates the flywheel, the angle of the flywheel rotation cannot be accurately controlled, which leads to a large deviation in the valve adjustment process.

[0006] The present application provides a valve adjustment auxiliary device arranged on the flywheel disc of an engine, which comprises:

[0007] A driving assembly arranged on the flywheel disc, the driving assembly comprising an input shaft coaxial with the flywheel disc, the input shaft rotates one revolution to drive the flywheel disc to complete one working cycle of the engine;

[0008] The dial assembly comprises a static dial, a dynamic dial and a driver, the driver is coaxially rotatably connected with the static dial, the dynamic dial is coaxially sleeved on the driver and fixedly connected with the driver, the driver is coaxially arranged with the input shaft and has two states of transmission connection and disconnection, the static dial is provided with a pointer in the radial direction, the static dial is fixed relative to the engine so that the pointer is located at the 12 o'clock direction of the static dial, and the dynamic dial is provided with a plurality of scale lines at equal angles around the axis of the dynamic dial, and the number of the scale lines is equal to the number of cylinders of the engine.

[0009] As a preferred technical solution of the valve adjustment auxiliary device, the driving assembly comprises a sun gear, a ring gear, a planet carrier and a plurality of planet gears, the ring gear is fixed relative to the engine and coaxially arranged with the flywheel disc, the input shaft is coaxially arranged on the sun gear, a plurality of planet gears can drive the flywheel disc to synchronously rotate around the axis of the flywheel disc, the planet carrier is rotatably connected with the input shaft, and a plurality of planet gears are rotatably arranged on the planet carrier.

[0010] As a preferred technical solution of the valve adjustment auxiliary device, the flywheel disc is provided with a plurality of bolts at intervals around the axis of the flywheel disc.

[0011] The driving assembly further comprises a plurality of driving sleeves, one-to-one correspondence exists among the plurality of planet gears, the plurality of driving sleeves and the plurality of bolts, the driving sleeve is arranged between the corresponding planet gear and the bolt and rotatably connected with the corresponding planet gear, the end face opposite to the driving sleeve and the bolt is concavely provided with a recess hole matched with the screw head of the bolt, and the screw head of the bolt is inserted into the recess hole.

[0012] As a preferred technical solution of the valve adjustment auxiliary device, the flywheel disc is provided with a plurality of bolts at intervals around the axis of the flywheel disc.

[0013] One-to-one correspondence exists among the plurality of planet gears and the plurality of bolts, the end face opposite to the planet gear and the corresponding bolt is concavely provided with a round hole, and the screw head of the bolt is inserted into the round hole.

[0014] As a preferred technical solution of the valve adjustment auxiliary device, the driving assembly further comprises a positioning wheel, the positioning wheel is simultaneously engaged with the sun gear and the ring gear, the positioning wheel is convexly provided with a positioning pin along the axis of the positioning wheel, and the positioning pin is inserted into the mark hole of the flywheel disc.

[0015] As a preferred technical solution of the valve adjustment auxiliary device, the static dial is fixedly connected with the ring gear.

[0016] As the preferred technical scheme of the valve adjusting auxiliary device, the driver comprises a driving shaft and a clutch, the driving shaft is rotationally arranged on the static dial and coaxially arranged with the static dial, and the clutch is used for enabling the driving shaft and the input shaft to have two states of transmission connection and disconnection.

[0017] As the preferred technical scheme of the valve adjusting auxiliary device, the static dial is provided with a first observation window, and the first observation window can observe the relative position of the pointer and the scale line on the dynamic dial.

[0018] And / or, the static dial is provided with a second observation window, and the second observation window can observe the relative position of the pointer and the mark hole of the flywheel disc.

[0019] As the preferred technical scheme of the valve adjusting auxiliary device, the engine is a four-stroke engine, and the transmission ratio of the driving assembly is 1:2.

[0020] As the preferred technical scheme of the valve adjusting auxiliary device, the engine is a two-stroke engine, and the transmission ratio of the driving assembly is 1:1.

[0021] The beneficial effects of the present application are:

[0022] The application provides a valve adjustment auxiliary device for being arranged on a flywheel disc of an engine, which comprises a driving assembly and a dial assembly. The driving assembly is arranged on the flywheel disc and comprises an input shaft coaxial with the flywheel disc. One rotation of the input shaft drives the flywheel disc to drive the engine to complete one working cycle. The dial assembly comprises a static dial, a dynamic dial and a driver. The driver is coaxially rotatably connected with the static dial, the dynamic dial is coaxially sleeved on the driver and fixedly connected with the driver, the driver is coaxially arranged with the input shaft and has two states of transmission connection and disconnection, the static dial is provided with a pointer in the radial direction, the static dial is fixed relative to the engine so that the pointer is located at the 12 o'clock direction of the static dial, and the dynamic dial is provided with a plurality of graduation lines at equal angles around the axis of the dynamic dial, and the number of the graduation lines is equal to the number of cylinders of the engine. After the valve adjustment auxiliary device is arranged on the flywheel disc, the driver is first adjusted to the state of transmission connection with the input shaft, then the driving assembly is driven to work through the driver, and the axis of the mark hole on the flywheel disc intersects with the pointer on the static dial. At this time, the first piston cylinder of the engine is at the compression top dead center. Then the driver is adjusted to the state of disconnection with the input shaft, the driver continues to rotate, the driver drives the dynamic dial to rotate, and then one graduation line on the dynamic dial coincides with the pointer. Then the driver is adjusted to the state of transmission connection with the input shaft again. When the valve clearance of the intake valve and the valve clearance of the exhaust valve corresponding to the first piston cylinder are adjusted, the flywheel disc and the dynamic dial are driven to rotate simultaneously by the driver. When the pointer coincides with another graduation line on the dynamic dial, another piston cylinder of the engine is at the compression top dead center, and then the valve clearance of the intake valve and the valve clearance of the exhaust valve corresponding to the piston cylinder are adjusted. The above operation is repeated until the pointer coincides with all the graduation lines on the dynamic dial, and then the valve clearance adjustment of all the valves of the engine is completed. The valve adjustment auxiliary device can accurately adjust each piston cylinder to the compression top dead center, and the deviation in the valve clearance adjustment process is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structural schematic view of the valve adjustment auxiliary device in the first embodiment of the application.

[0024] Figure 2 It is an exploded schematic view of the valve adjustment auxiliary device in the first embodiment of the application.

[0025] Figure 3 It is a side view of the valve adjustment auxiliary device in the first embodiment of the application. Figure 1 Figure 1 ;

[0026] Figure 4 It is a side view of the valve adjustment auxiliary device in the second embodiment of the application. Figure 1 Figure 2 ;

[0027] ​​Figure 5 Fig. 1 is a structural schematic diagram of the dial plate in the first embodiment of the present application;

[0028] Figure 6 Fig. 2 is a structural schematic diagram of the valve adjusting auxiliary device in the second embodiment of the present application;

[0029] Figure 7 Fig. 3 is a front view of the valve adjusting auxiliary device in the second embodiment of the present application; Figure 6 Fig. 4 is a side view of the valve adjusting auxiliary device in the second embodiment of the present application.

[0030] Fig. 5 is a sectional view of the valve adjusting auxiliary device in the second embodiment of the present application.

[0031] 100, flywheel plate; 101, bolt;

[0032] 11, input shaft; 12, sun gear; 13, ring gear; 14, planet carrier; 15, planet gear; 151, round hole; 16, driving sleeve; 161, recess; 17, positioning wheel;

[0033] 2, dial plate assembly; 21, static dial plate; 211, pointer; 212, first observation window; 213, second observation window; 22, dynamic dial plate; 221, scale line; 23, driver; 231, driving shaft; 232, clutch. DETAILED DESCRIPTION

[0034] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0035] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and moreover, the "above", "above" and "above" of the first feature on the second feature include the first feature above and obliquely above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature on the second feature include the first feature below and obliquely below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0036] In the description of the present application, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present application, and cannot be understood as a limitation of the present application.

[0038] As Figures 1-5As shown, the embodiment provides a valve adjustment auxiliary device for being arranged on the flywheel disc 100 of an engine, which comprises a driving assembly and a dial assembly 2. The driving assembly is arranged on the flywheel disc 100 and comprises an input shaft 11 coaxial with the flywheel disc 100. One rotation of the input shaft 11 drives the flywheel disc 100 to drive the engine to complete one working cycle. The dial assembly 2 comprises a static dial 21, a dynamic dial 22 and a driver 23. The driver 23 is coaxially rotatably connected with the static dial 21. The dynamic dial 22 is coaxially sleeved on the driver 23 and fixedly connected with the driver 23. The driver 23 is coaxially arranged with the input shaft 11 and has two states of transmission connection and disconnection. The static dial 21 is radially provided with a pointer 211. The static dial 21 is arranged to be relatively fixed with the engine so that the pointer 211 is located at the 12 o'clock direction of the static dial 21. The dynamic dial 22 is provided with a plurality of graduation lines 221 at equal angles around the axis of the dynamic dial 22. The number of the graduation lines 221 is equal to the number of the cylinders of the engine. After the valve adjustment auxiliary device is installed on the flywheel disc 100, first, the driver 23 is adjusted to the state of transmission connection with the input shaft 11. Then, the driver 23 drives the driving assembly to work, thereby making the axis of the mark hole on the flywheel disc 100 intersect with the pointer 211 on the static dial 21. At this time, the first piston cylinder of the engine is at the compression top dead center. Then, the driver 23 is adjusted to the state of disconnection with the input shaft 11. The driver 23 continues to rotate. At this time, the driver 23 drives the dynamic dial 22 to rotate, thereby making one graduation line 221 on the dynamic dial 22 coincide with the pointer 211. Then, the driver 23 is adjusted to the state of transmission connection with the input shaft 11 again. When the valve clearance of the intake valve and the valve clearance of the exhaust valve corresponding to the first piston cylinder are adjusted, the driver 23 drives the flywheel disc 100 and the dynamic dial 22 to rotate simultaneously. When the pointer 211 coincides with another graduation line 221 on the dynamic dial 22, another piston cylinder of the engine is at the compression top dead center. Then, the valve clearance of the intake valve and the valve clearance of the exhaust valve corresponding to the piston cylinder are adjusted. The above-mentioned actions are repeated until the pointer 211 coincides with all the graduation lines 221 on the dynamic dial 22. Then, the valve clearances of all the cylinders of the engine are adjusted.

[0039] Optionally, a number corresponding to the piston cylinder can be marked beside each graduation line 221 on the dynamic dial 22. For example, when the engine is a straight six-cylinder engine, six graduation lines 221 are provided on the dynamic dial 22. The numbers of the six graduation lines 221 are 1-5-3-6-2-4 in sequence. When the pointer 211 points to the 1 graduation line 221, the first piston cylinder is at the compression top dead center. When the pointer 211 points to the 5 graduation line 221, the fifth piston cylinder is at the compression top dead center. And so on.

[0040] Optionally, the driving assembly comprises the sun gear 12, the ring gear 13, the planet carrier 14 and the plurality of planet gears 15, the ring gear 13 is fixed relative to the engine and coaxially arranged with the flywheel disc 100, the input shaft 11 is coaxially arranged with the sun gear 12, the plurality of planet gears 15 can drive the flywheel disc 100 to rotate synchronously around the axis of the flywheel disc 100, the planet carrier 14 is rotationally matched with the input shaft 11, and the plurality of planet gears 15 are rotationally arranged on the planet carrier 14. In this embodiment, the input shaft 11 penetrates through the planet carrier 14 and is fixedly connected with the sun gear 12, the input shaft 11, the planet carrier 14 and the sun gear 12 are coaxially arranged, and the planet carrier 14 is rotationally matched with the input shaft 11 through a bearing. Since the ring gear 13 is fixed relative to the engine, the driver 23 drives the sun gear 12 to rotate, so that the sun gear 12 drives the plurality of planet gears 15 to rotate around the input shaft 11 while rotating around the sun gear 12, and then the plurality of planet gears 15 can drive the flywheel disc 100 to rotate synchronously around the axis of the flywheel disc 100.

[0041] Optionally, the flywheel disc 100 is spaced apart by a plurality of bolts 101 around the axis of the flywheel disc 100; the driving assembly further comprises a plurality of driving sleeves 16, the plurality of planet gears 15, the plurality of driving sleeves 16 and the plurality of bolts 101 are one-to-one corresponding, the driving sleeve 16 is arranged between the corresponding planet gear 15 and the bolt 101 and rotationally matched with the corresponding planet gear 15, the end face of the driving sleeve 16 opposite to the bolt 101 is concavely provided with a recess hole 161 matched with the screw head of the bolt 101, and the screw head of the bolt 101 is inserted into the recess hole 161. In this embodiment, the screw head of the bolt 101 is inserted into the recess hole 161, so that the driving sleeve 16 can drive the screw head to move along the radial direction perpendicular to the recess hole 161, and therefore the planet gear 15 can drive the flywheel disc 100 to rotate through the driving sleeve 16. Since the bolt 101 is fixedly connected with the flywheel disc 100 and the recess hole 161 is matched with the screw head, the driving sleeve 16 cannot rotate around its axis, and therefore the planet gear 15 and the driving sleeve 16 need to be rotationally matched.

[0042] Optionally, the planet gear 15 is convexly provided with a rotating shaft along the axis on one side limited by the flywheel disc 100, the end face of the driving sleeve 16 away from the flywheel disc 100 is concavely provided with a mounting groove, a bearing is fixedly arranged in the mounting groove, the rotating shaft of the planet gear 15 is inserted into the inner ring of the bearing in the mounting groove, and the rotating shaft is interference-fitted with the inner ring of the bearing.

[0043] As a preferred technical solution of the valve adjusting auxiliary device, the driving assembly further comprises a positioning wheel 17, the positioning wheel 17 is simultaneously meshed with the sun gear 12 and the ring gear 13, the positioning wheel 17 is convexly provided with a positioning pin along the axis of the positioning wheel 17, and the positioning pin is used for being inserted into the mark hole of the flywheel disc 100.

[0044] Optionally, the stationary dial 21 is fixedly connected to the gear ring 13. In this embodiment, the stationary dial 21 and the gear ring 13 are fixed by welding, screwing, or gluing. This arrangement allows the stationary dial 21 and the gear ring 13 to form a receiving cavity, in which the driver 23, sun gear 12, planet gears 15, etc., are all located. This arrangement can prevent the driver 23 and gears from causing injury to workers.

[0045] Optionally, the gear ring 13 is fixed to the flywheel disk 100 housing of the engine.

[0046] Optionally, the driver 23 includes a drive shaft 231 and a clutch 232. The drive shaft 231 is rotatably mounted on and coaxially arranged with the stationary dial 21. The clutch 232 is used to allow the drive shaft 231 and the input shaft 11 to have two states: transmission connection and disconnection. In this embodiment, when the clutch 232 drives the drive shaft 231 and the input shaft 11 to drive each other, the operator can drive the drive shaft 231 to rotate, thereby driving the input shaft 11 to rotate. When the clutch 232 disconnects the drive shaft 231 and the input shaft 11 from transmission connection, the operator can drive the drive shaft 231 to rotate, and the drive shaft 231 drives the clutch 232 to rotate.

[0047] Optionally, the stationary dial 21 is provided with a first observation window 212, which allows observation of the relative position of the pointer 211 and the graduation line 221 on the moving dial 22; and / or, the stationary dial 21 is provided with a second observation window 213, which allows observation of the relative position of the pointer 211 and the marking hole of the flywheel 100. In this embodiment, this arrangement facilitates observation by the operator.

[0048] Optionally, the engine is a four-stroke engine, and the transmission ratio of the drive assembly is 1:2. In this embodiment, the engine completes one working cycle when the crankshaft of the four-stroke engine rotates two revolutions. Therefore, when the valve clearance adjustment of the engine is completed, the flywheel 100 needs to rotate 720°. At this time, the corresponding moving dial 22 rotates 360°. Therefore, the transmission ratio of the drive assembly is 1:2.

[0049] Optionally, the engine is a two-stroke engine, and the transmission ratio of the drive assembly is 1:1. In this embodiment, the engine completes one working cycle when the crankshaft of the two-stroke engine rotates one revolution. Therefore, when the valve clearance adjustment of the engine is completed, the flywheel 100 needs to rotate 360°. At this time, the corresponding moving dial 22 rotates 360°, hence the transmission ratio of the drive assembly is 1:1.

[0050] Example 2

[0051] like Figure 6 and Figure 7As shown, this embodiment is basically the same as Embodiment 1, the only difference being how the planetary gears 15 drive the flywheel disk 100 to rotate. Optionally, multiple bolts 101 are spaced apart around the axis of the flywheel disk 100; the multiple planetary gears 15 and the multiple bolts 101 correspond one-to-one, and the end face of the planetary gear 15 opposite to the corresponding bolt 101 is recessed with a circular hole 151, and the screw head of the bolt 101 is inserted into the circular hole 151. In this embodiment, after the screw head of the bolt 101 is inserted into the circular hole 151, the screw head can still rotate around the axis of the planetary gear 15. Therefore, when the planetary gear 15 revolves, the planetary gear 15 can drive the screw head to rotate around the axis of the input shaft 11, thereby driving the flywheel disk 100 to rotate.

[0052] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A valve adjustment aid device for being provided on a flywheel disk (100) of an engine, characterized in that, The application relates to a flywheel disc (100) and a driving assembly. The driving assembly is arranged on the flywheel disc (100) and comprises an input shaft (11) coaxial with the flywheel disc (100), the input shaft (11) rotates one circle to drive the flywheel disc (100) to drive the engine to complete one working cycle. The dial plate assembly (2) comprises a static dial plate (21), a dynamic dial plate (22) and a driver (23), the driver (23) is coaxially matched with the static dial plate (21), the dynamic dial plate (22) is coaxially sleeved on the driver (23) and is fixedly connected with the driver (23), the driver (23) is coaxially arranged with the input shaft (11) and has two states of transmission connection and disconnection, the static dial plate (21) is provided with a pointer (211) in the radial direction, the static dial plate (21) is fixedly arranged opposite to the engine, so that the pointer (211) is located at the 12 o'clock direction of the static dial plate (21), and the dynamic dial plate (22) is provided with a plurality of graduation lines (221) at equal angles around the axis of the dynamic dial plate (22), the number of the graduation lines (221) is equal to the number of cylinders of the engine.

2. The valve timing assist device according to claim 1, characterized by The driving assembly comprises a sun gear (12), a ring gear (13), a planet carrier (14) and a plurality of planet gears (15), the ring gear (13) is fixedly arranged opposite to the engine and coaxially arranged with the flywheel disc (100), the input shaft (11) is coaxially arranged on the sun gear (12), the plurality of planet gears (15) can drive the flywheel disc (100) to synchronously rotate around the axis of the flywheel disc (100), and the planet carrier (14) is rotationally matched with the input shaft (11), and the plurality of planet gears (15) are rotationally arranged on the planet carrier (14).

3. The valve timing assist device according to claim 2, characterized by The flywheel disc (100) is provided with a plurality of bolts (101) at intervals around the axis of the flywheel disc (100). The driving assembly further comprises a plurality of driving sleeves (16), the plurality of planet gears (15), the plurality of driving sleeves (16) and the plurality of bolts (101) are one-to-one corresponding, the driving sleeve (16) is arranged between the corresponding planet gear (15) and the bolt (101) and is rotationally matched with the corresponding planet gear (15), and the end face of the driving sleeve (16) opposite to the bolt (101) is concavely provided with a recess hole (161) matched with the screw head of the bolt (101), and the screw head of the bolt (101) is inserted into the recess hole (161).

4. The valve timing assist device according to claim 2, characterized by The flywheel disc (100) is provided with a plurality of bolts (101) at intervals around the axis of the flywheel disc (100). The plurality of planet gears (15) and the plurality of bolts (101) are one-to-one corresponding, the end face of the planet gear (15) opposite to the corresponding bolt (101) is concavely provided with a round hole (151), and the screw head of the bolt (101) is inserted into the round hole (151).

5. The valve timing adjustment assist device according to claim 2, characterized by The drive assembly further comprises a positioning wheel (17) which is engaged with the sun gear (12) and the ring gear (13) at the same time, the positioning wheel (17) is provided with a positioning pin along the axis of the positioning wheel (17), the positioning pin is used for being inserted into the mark hole of the flywheel disc (100).

6. The valve timing assist device according to claim 2, characterized by The static dial (21) is fixedly connected with the ring gear (13).

7. Valve adjustment aid according to any of claims 1 to 6, characterized in that The driver (23) comprises a driving shaft (231) and a clutch (232), the driving shaft (231) is rotationally arranged on the static dial (21) and coaxially arranged with the static dial (21), the clutch (232) is used for making the driving shaft (231) and the input shaft (11) have two states of transmission connection and disconnection.

8. Valve adjustment aid according to any of claims 1 to 6, characterized in that The static dial (21) is provided with a first observation window (212), the first observation window (212) can observe the relative position of the pointer (211) and the scale line (221) on the dynamic dial (22); And / or, the static dial (21) is provided with a second observation window (213), the second observation window (213) can observe the relative position of the pointer (211) and the mark hole of the flywheel disc (100).

9. Valve adjustment aid according to any of claims 1-6, characterized in that The engine is a four-stroke engine, and the transmission ratio of the drive assembly is 1:

2.

10. The valve adjustment aid of any one of claims 1-6, wherein, The engine is a two-stroke engine, and the transmission ratio of the drive assembly is 1:1.

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