Four-cylinder engine balance shaft system

Abstract

The invention discloses a four-cylinder engine balance shaft system, and relates to the technical field of engine damping, the four-cylinder engine balance shaft system comprises a balance shaft main body and a four-cylinder driving device, the four-cylinder driving device is fixedly connected with a first fluted disc, the surface of the balance shaft main body is fixedly connected with a second fluted disc, and the first fluted disc is engaged with the second fluted disc; the inner wall of the balance shaft main body is fixedly connected with an inner shaft, a shaft arm of the inner shaft is fixedly connected with an eccentric shell, a balancing weight is arranged in the eccentric shell, the shaft arm of the inner shaft is connected with two auxiliary blocks in a sliding mode, the balance shaft further comprises an adjusting component, and the adjusting component is arranged on the eccentric shell so as to control the distance between the balancing weight and the inner shaft. The damping device further comprises a switching component for controlling the displacement speed of the balancing weight to change when the distance between the balancing weight and the inner shaft is changed, the damping device further comprises an auxiliary component, and through mutual cooperation of the structures, the damping device has the effects of facilitating maintenance of maintainers and timely guaranteeing a good damping function.

Description

Technical Field

[0001] The invention relates to the technical field of engine vibration reduction, in particular to a balance shaft system for a four-cylinder engine. Background Art

[0002] The engine is the source of power for the car to move forward. When it is in working state, the movement speed of the piston is relatively fast. When the piston is at the upper and lower dead points, its speed is zero, but the speed in the middle of the upper and lower dead points reaches the highest. Therefore, the movement speed of the piston is very uneven, which makes the piston make repeated high-speed linear motion in the cylinder, which will inevitably generate a large inertial force on the structural connection.

[0003] In order to eliminate this vibration, most people now use a balance shaft to offset it. Specifically, the balance shaft is a shaft equipped with an eccentric weight and rotates synchronously with the crankshaft. The reverse vibration force generated by the eccentric weight during rotation can achieve a good balance effect on the engine, thereby reducing engine vibration. Traditional balance shafts often fix the counterweight directly on the shaft rod. As the car ages, the degree of engine vibration will change compared to when it was new. At this time, the balance shaft is not suitable for engine shock absorption in this state. When the car is driven to the repair shop, it is extremely inconvenient to replace the equipment, and the resources of the balance shaft are also wasted. There is now a separation component for the eccentric weight and the balance shaft body, so that it can be easily removed during maintenance. However, this component still has the defect of being difficult to operate in actual applications. Maintenance personnel need to stock the balance shaft, which is inconvenient to inspect and maintain and greatly wastes the resources of the balance shaft. Therefore, the existing engine balance shaft assembly still needs to be improved. Summary of the invention

[0004] The purpose of the present invention is to provide a four-cylinder engine balance shaft system, which is convenient for maintenance personnel to maintain and ensures good shock absorption function in time, thereby solving the problems mentioned in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a four-cylinder engine balance shaft system, comprising a balance shaft body and a four-cylinder drive device, wherein a first toothed disc is fixedly connected to the four-cylinder drive device, a second toothed disc is fixedly connected to the surface of the balance shaft body, and the first toothed disc meshes with the second toothed disc; The inner wall of the balancing shaft body is fixedly connected with an inner shaft, the shaft arm of the inner shaft is fixedly connected with an eccentric housing, a counterweight block is arranged in the eccentric housing, and the shaft arm of the inner shaft is slidably connected with two auxiliary blocks; Also included is an adjusting component, which is arranged on the eccentric housing to control the distance between the counterweight block and the inner shaft; It also includes a switching component, which is in driving connection with the adjusting component, so as to change the speed of the displacement of the counterweight block when the distance between the counterweight block and the inner shaft is changed; An auxiliary component is also included so that when the switching component is in operation, the two auxiliary blocks perform circular arc displacement.

[0006] Optionally, the adjusting component includes: An adjusting shaft, the shaft arm of the adjusting shaft is rotatably connected to the inner wall of the eccentric shell, the shaft arm of the adjusting shaft is fixedly connected to a rotating cylinder, the outer wall of the rotating cylinder is provided with a displacement groove 1 and a displacement groove 2, the displacement groove 1 and the displacement groove 2 are symmetrically arranged, the groove walls of the displacement groove 1 and the displacement groove 2 are both slidably connected with a connecting block, the surfaces of the two connecting blocks are hinged with hinged rods, the ends of the two hinged rods are jointly hinged with an adjusting box, the inner wall of the eccentric shell is provided with a cavity for the displacement of the adjusting box, and a counterweight bag is buried in the adjusting box.

[0007] Optionally, the switching component includes: A fixed shaft, the shaft arm of the adjusting shaft is fixedly connected with an adjusting gear, the surface of the eccentric housing is slidably connected with a slide plate, the inner wall of the slide plate is rotatably connected with an inner toothed disc, the surface of the inner toothed disc is fixedly connected with the shaft arm of the fixed shaft, the shaft arm of the fixed shaft is fixedly connected with a switching gear, and the teeth of the inner toothed disc are meshed with the teeth of the adjusting gear; Also included are two groups of locking components arranged on the slide plate.

[0008] Optionally, the locking component includes: A push rod, the push rod is slidably connected to the inner wall of the slide, the end of the push rod is fixedly connected to a spring, the end of the spring is fixedly connected to the inner wall of the slide, the inner wall of the push rod is provided with two groups of inclined grooves, the groove walls of the two groups of inclined grooves are slidably connected with a locking shaft, the shaft arm of the locking shaft is fixedly connected with a locking rod, and the surface of the eccentric shell is provided with two locking openings, and the two locking openings are adapted to the size of the locking rod.

[0009] Optionally, the auxiliary components include: Two auxiliary rods are hinged on the surface of the slide plate, and ends of the two auxiliary rods are hinged to the surfaces of the two auxiliary blocks respectively.

[0010] Optionally, a transmission shaft is fixedly connected to the surface of the inner gear disk, an arm of the transmission shaft is rotatably connected to the inner wall of the skateboard, an end of the transmission shaft is fixedly connected to a torsion bar, and an anti-slip pattern is provided on the surface of the torsion bar.

[0011] Optionally, a button is fixedly connected to the end of the push rod, and a surface of the button is provided with anti-slip textures.

[0012] Optionally, a weight block is fixedly connected to the surface of the eccentric shell, and the specifications of the weight block are compatible with the specifications of the skateboard.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention makes it possible to change the distance between the counterweight bag and the inner shaft by cooperating with structures such as a rotating drum, a displacement slot and an adjustment box. Thus, when the inner shaft rotates, the deflection force brought by the eccentric shell will change. In this way, maintenance personnel do not need to find other accessories to replace during maintenance, which makes maintenance convenient.

[0014] 2. The present invention coordinates the structures such as the adjusting shaft, the adjusting gear and the switching gear, so that when the maintenance personnel drives the inner gear disk to drive the adjusting gear to move, it will rotate at a relatively slow speed. That is, at this time, the distance change speed between the counterweight bag and the inner shaft will be relatively slow. In this way, the maintenance personnel can better control and make the adjustment process more refined and further convenient to use.

[0015] Third, the present invention cooperates with the push rod, the inclined groove and the locking shaft, etc., so that the maintenance personnel need to press two fingers at the same time when unlocking. In this state, after the personnel press the two push rods, the slide plate is pinched. At this time, the personnel can directly move the slide plate, and the personnel unlocking process is more convenient. There is no need to deliberately keep the unlocked state, and the operation can be completed with one hand; At the same time, the symmetrical setting of the two sets of push rods also avoids the possibility of accidental touch.

[0016] Fourth, the present invention cooperates with structures such as auxiliary rods, slides and auxiliary blocks, so that personnel can intuitively see the current position of the slide by judging whether the two auxiliary blocks are in contact with each other through the position status of the two auxiliary blocks, thereby further improving the convenience of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is an axonometric view of the present invention; Figure 2 It is a right side view of the eccentric housing connection part of the present invention; Figure 3 It is a left side view of the eccentric housing connection part of the present invention; Figure 4 For the present invention Figure 3 A magnified view of the structure at B in the middle; Figure 5 It is a structural schematic diagram of the inner gear disc connection part of the present invention from a left perspective; Figure 6 For the present invention Figure 5 A magnified view of the structure at center A; Figure 7It is a schematic diagram of the cooperation between the locking rod and the push rod of the present invention; Figure 8 A schematic diagram of the position of the regulating box of the present invention in the cavity; Fig. 9 It is an exploded view of the matching structure of the inner gear disc, the adjusting gear and the slide plate of the present invention.

[0018] In the figure: 1. balancing shaft body; 2. four-cylinder drive device; 3. first gear disc; 4. second gear disc; 5. inner shaft; 6. eccentric housing; 7. counterweight; 8. adjusting shaft; 9. rotating drum; 10. displacement slot one; 11. displacement slot two; 12. connecting block; 13. hinged rod; 14. adjusting box; 15. cavity; 16. counterweight bag; 17. fixed shaft; 18. adjusting gear; 19. slide plate; 20. inner gear disc; 21. switching gear; 22. push rod; 23. spring; 24. inclined groove; 25. locking shaft; 26. locking rod; 27. locking mouth; 28. auxiliary block; 29. ​​auxiliary rod; 30. transmission shaft; 31. twist; 32. button; 33. load block. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] For example, see Figures 1 to 9 The present invention provides a four-cylinder engine balance shaft system, including a balance shaft body 1 and a four-cylinder drive device 2, a first gear plate 3 is fixedly connected to the four-cylinder drive device 2, a second gear plate 4 is fixedly connected to the surface of the balance shaft body 1, and the first gear plate 3 is meshed with the second gear plate 4.

[0021] The inner wall of the balancing shaft body 1 is fixedly connected with an inner shaft 5, the shaft arm of the inner shaft 5 is fixedly connected with an eccentric housing 6, a counterweight block 7 is arranged in the eccentric housing 6, and the shaft arm of the inner shaft 5 is slidably connected with two auxiliary blocks 28; It also includes an adjusting component, a switching component and an auxiliary component. The adjusting component is arranged on the eccentric housing 6, and the switching component is transmission-connected with the adjusting component.

[0022] In this embodiment, when the equipment is in use, the operation of the four-cylinder drive device 2 and the rotation of the first sprocket 3 drive the second sprocket 4 to rotate synchronously, so that the balance shaft body 1 can be rotated through the second sprocket 4, and then the inner shaft 5 can be rotated through the balance shaft body 1, so that the inner shaft 5 can drive the eccentric shell 6 thereon to perform a circumferential displacement, and the four-cylinder drive device 2 can be assisted by the synchronous circumferential displacement of the counterweight block 7 in the eccentric shell 6.

[0023] With the increase of service life, when the degree of vibration of the four-cylinder drive device 2 changes greatly, it is difficult to cooperate with the eccentric housing 6 in this state. At this time, the maintenance personnel can control the adjustment component to change the distance between the counterweight block 7 and the inner shaft 5. In this way, the balancing force brought by the eccentric housing 6 can be changed, so that it can be adjusted according to the actual situation without removing the components for replacement. During the adjustment process of the maintenance personnel, it can cooperate with the switching component to control the speed change when adjusting the distance between the counterweight block 7 and the inner shaft 5, so that the maintenance personnel can be more precise in adjustment and further convenient to use. Through the setting of the auxiliary components, when the eccentric housing 6 is displaced, the two auxiliary blocks 28 can be displaced in an arc, so that the maintenance personnel can be reminded of the connection state of the switching components through the state of the two auxiliary blocks 28, so as to avoid the situation where the personnel carelessly forget to reset after the maintenance is completed.

[0024] It is worth noting that the eccentric housing 6 drives the counterweight 7 to rotate, thereby offsetting the vibration force of the four-cylinder drive device 2. This process is mature in the prior art, and the specific principle will not be repeated here.

[0025] See also Figures 3 to 9 The adjusting component includes an adjusting shaft 8, the shaft arm of the adjusting shaft 8 is rotatably connected to the inner wall of the eccentric shell 6, the shaft arm of the adjusting shaft 8 is fixedly connected to a rotating drum 9, the outer wall of the rotating drum 9 is provided with a displacement groove 10 and a displacement groove 2 11, the displacement groove 10 and the displacement groove 2 11 are symmetrically arranged, the groove walls of the displacement groove 10 and the displacement groove 2 11 are both slidably connected with a connecting block 12, the surfaces of the two connecting blocks 12 are hinged with hinged rods 13, the ends of the two hinged rods 13 are jointly hinged with an adjusting box 14, the inner wall of the eccentric shell 6 is provided with a cavity 15 for displacement of the adjusting box 14, and a counterweight bag 16 is buried in the adjusting box 14.

[0026] In this embodiment, the maintenance personnel can control the rotation of the adjustment shaft 8. The rotation of the adjustment shaft 8 can make the rotating drum 9 rotate in the eccentric housing 6, and the rotation of the rotating drum 9 can make the displacement groove 10 and the displacement groove 2 11 thereon rotate synchronously. Since the displacement groove 10 and the displacement groove 2 11 are symmetrically arranged, that is, the curvature directions of the two are opposite, at this time, the synchronous rotation of the displacement groove 10 and the displacement groove 2 11 can make the two connecting blocks 12 displaced in opposite directions. Through the opposite displacement of the two connecting blocks 12, The connected hinged rods 13 can be pulled separately, so that the hinged rods 13 deflect synchronously with the connecting block 12 as the axis, and then the adjustment box 14 is displaced in the cavity 15 toward the direction close to the rotating drum 9 through the transmission of the hinged rod 13. In this way, the adjustment box 14 can synchronously drive the counterweight bag 16 to displace, and the distance between the counterweight bag 16 and the rotating drum 9 is changed, that is, the distance between the counterweight bag 16 and the inner shaft 5 is changed. In this way, when the inner shaft 5 rotates, the deflection force brought by the eccentric shell 6 will change.

[0027] Through the above method, the balancing force brought by the balancing shaft device can be adjusted, and maintenance personnel do not need to find other parts to replace during maintenance, which makes maintenance convenient.

[0028] See also Figures 3 to 9 The switching component includes a fixed shaft 17, the shaft arm of the adjusting shaft 8 is fixedly connected to an adjusting gear 18, the surface of the eccentric housing 6 is slidably connected to a slide plate 19, the inner wall of the slide plate 19 is rotatably connected to an inner gear plate 20, the surface of the inner gear plate 20 is fixedly connected to the shaft arm of the fixed shaft 17, the shaft arm of the fixed shaft 17 is fixedly connected to a switching gear 21, and the teeth of the inner gear plate 20 are meshed with the teeth of the adjusting gear 18.

[0029] Also included are two sets of locking components arranged on the slide plate 19 .

[0030] In this embodiment, during maintenance, the maintenance personnel can rotate the inner toothed disc 20, and the meshing adjusting gear 18 can be rotated by the rotation of the inner toothed disc 20, and the adjusting shaft 8 can be driven by the self-rotation of the adjusting gear 18. Combined with the above, the distance between the counterweight bag 16 and the inner shaft 5 can be changed. At the same time, during maintenance, the maintenance personnel can also first unlock the position state of the slide plate 19 by operating the locking component, and then move the slide plate 19 so that the slide plate 19 synchronously drives the inner toothed disc 20 to move. At this time, the teeth of the inner toothed disc 20 will be disengaged from the teeth of the adjusting gear 18, and then the slide plate 19 will be moved. The movement of plate 19 causes the teeth of switching gear 21 to mesh with the teeth of adjusting gear 18. At this time, when the maintenance personnel rotate the inner gear disc 20 again, the teeth matching the adjusting gear 18 change, and the larger transmission ratio of the inner gear disc 20 is changed to the smaller transmission ratio matching the switching gear 21. At this time, the maintenance personnel drive the rotation of the inner gear disc 20, and when driving the adjusting gear 18 to rotate, it will rotate at a relatively slow speed. That is, the distance change speed between the counterweight bag 16 and the inner shaft 5 will be relatively slow at this time. At this time, the maintenance personnel can better control it, making the adjustment process more refined and further convenient to use.

[0031] It is worth noting that in the above process, by setting up two sets of locking components, the position of the slide plate 19 will remain unchanged when the driving structure is in operation. Similarly, after the switching is completed, it will be automatically locked by the locking components.

[0032] See also Figure 6 and Figure 7 The locking component includes a push rod 22, and a button 32 is fixedly connected to the end of the push rod 22. The surface of the button 32 is provided with anti-slip grooves. When a person presses the button 32, the push rod 22 can be pushed. The anti-slip grooves can prevent the person's fingers from slipping when pressing.

[0033] See also Figures 3 to 7 The push rod 22 is slidably connected to the inner wall of the slide plate 19, and a spring 23 is fixedly connected to the end of the push rod 22. The end of the spring 23 is fixedly connected to the inner wall of the slide plate 19. The inner wall of the push rod 22 is provided with two groups of inclined grooves 24. The groove walls of the two groups of inclined grooves 24 are slidably connected with a locking shaft 25. The shaft arm of the locking shaft 25 is fixedly connected with a locking rod 26. The surface of the eccentric housing 6 is provided with two locking openings 27, and the two locking openings 27 are adapted to the size of the locking rod 26.

[0034] In this embodiment, the personnel can press the push rod 22 to make the push rod 22 compress the spring 23 to move. During the displacement of the push rod 22, the two sets of inclined slots 24 are synchronously driven to move, so that the locking shaft 25 slides along the groove wall of the inclined slot 24 under the push of the two sets of inclined slots 24, and then the locking rod 26 is displaced through the movement of the locking shaft 25, that is, the locking rod 26 is disengaged from the locking port 27. At this time, the maintenance personnel moves the slide plate 19 to complete the switching of the transmission ratio of the adjustment gear 18, and then releases the pressing state of the push rod 22. Under the elastic action of the spring 23, the push rod 22 is quickly reset. At this time, the locking rod 26 is synchronously and quickly displaced and inserted into the other locking port 27, so that the position of the slide plate 19 can be locked in two states; By adopting this method, firstly, the two push rods 22 are set so that the maintenance personnel need to press two fingers at the same time when unlocking. In this state, after the personnel presses the two push rods 22, the slide plate 19 is pinched. At this time, the personnel can directly move the slide plate 19, and the unlocking process of the personnel is more convenient. There is no need to deliberately maintain the unlocked state, and the operation can be completed with one hand. At the same time, the possibility of accidental touch is also avoided through the setting of two groups.

[0035] Embodiment 2, based on the above embodiment: See also Figures 3 to 5 The auxiliary components include two auxiliary rods 29 , both of which are hinged on the surface of the slide plate 19 , and the ends of the two auxiliary rods 29 are hinged to the surfaces of the two auxiliary blocks 28 , respectively.

[0036] In this embodiment, since the change between the two states is the change in the vertical position of the slide plate 19, in order to avoid carelessness of the maintenance personnel, the structure is not reset after the maintenance is completed. When the above-mentioned slide plate 19 is displaced, the two auxiliary rods 29 will be pushed, so that the two auxiliary rods 29 are displaced synchronously and deflected at the same time, so that the two auxiliary blocks 28 slide along the axial arm of the inner shaft 5. In this way, the maintenance personnel can intuitively see the current position state of the slide plate 19 by judging whether the two auxiliary blocks 28 are in contact with each other, thereby further improving the convenience of maintenance.

[0037] Embodiment 3, based on the above embodiment: See also Fig. 9 A transmission shaft 30 is fixedly connected to the surface of the inner gear disc 20, and the shaft arm of the transmission shaft 30 is rotatably connected to the inner wall of the slide plate 19. A twist knob 31 is fixedly connected to the end of the transmission shaft 30, and the surface of the twist knob 31 is provided with anti-slip patterns.

[0038] In this embodiment, the maintenance personnel can rotate the knob 31 so that the knob 31 drives the transmission shaft 30 to rotate, thereby driving the inner gear disk 20 to rotate through the rotation of the transmission shaft 30. Considering that the maintenance personnel's fingers may be contaminated with substances such as engine oil, the anti-slip texture is provided to prevent the maintenance personnel's fingers from slipping during operation.

[0039] Also, see Figure 2 and Figure 3 A weight block 33 is fixedly connected to the surface of the eccentric shell 6, and the specifications of the weight block 33 are adapted to the specifications of the slide plate 19. By setting the weight block 33, the weight on both sides of the eccentric shell 6 will be balanced when it rotates, that is, the weight of the weight block 33 only balances the weight of the slide plate 19 and the internal structure.

[0040] Working principle: When the four-cylinder engine balance shaft system is used, the operation of the four-cylinder drive device 2 and the rotation of the first toothed disc 3 drive the second toothed disc 4 to rotate synchronously, so that the balance shaft body 1 can be rotated through the second toothed disc 4, and then the inner shaft 5 can be rotated through the balance shaft body 1, so that the inner shaft 5 can drive the eccentric housing 6 thereon to perform circumferential displacement, and the circumferential displacement of the counterweight block 7 in the eccentric housing 6 can be used to assist the shock absorption of the four-cylinder drive device 2. As the service life increases, when the degree of vibration of the four-cylinder drive device 2 changes greatly, the maintenance personnel can rotate the knob 31 to rotate the inner toothed disc 20, and the meshing adjustment gear 18 can be rotated through the rotation of the inner toothed disc 20, and then the adjustment gear 18 can be adjusted. The transmission of the articulated shaft 8 causes the rotating drum 9 to rotate in the eccentric housing 6, thereby causing the displacement groove 10 and the displacement groove 2 11 thereon to rotate synchronously. Since the displacement groove 10 and the displacement groove 2 11 are symmetrically arranged, the two connecting blocks 12 can be displaced in opposite directions, thereby pulling the connected hinged rods 13 respectively, so that the hinged rods 13 are synchronously deflected with the connecting blocks 12 as axes, thereby causing the adjustment box 14 to be displaced in the cavity 15 toward the rotating drum 9 through the transmission of the hinged rod 13, so that the counterweight bag 16 in the adjustment box 14 can be synchronously displaced, that is, the distance between the counterweight block and the inner shaft 5 can be changed, so that the balancing force brought by the eccentric housing 6 can be changed, so that it can be adjusted according to the actual situation without removing the components for replacement; During the adjustment process, the maintenance personnel can first press the push rod 22 with two fingers to unlock the slide plate 19, and then move the slide plate 19, so that the teeth of the inner toothed disc 20 are disengaged from the teeth of the adjusting gear 18, and the teeth of the switching gear 21 are engaged with the teeth of the adjusting gear 18. Since the teeth matched with the adjusting gear 18 are changed, the larger transmission ratio of the inner toothed disc 20 is changed to the smaller transmission ratio matched with the switching gear 21. At this time, when the maintenance personnel drive the inner toothed disc 20 to rotate, the displacement speed of the counterweight bag 16 will change, that is, when the maintenance personnel drive the rotation of the inner toothed disc 20 and drive the adjusting gear 18 to rotate, the displacement speed will be relatively slow. In this way, when adjusting the distance between the counterweight bag 16 and the inner shaft 5, the distance change speed is slow, thereby making the adjustment process more refined. When the inspection is completed, the personnel can also visually see the current position of the slide plate 19 by judging whether the two auxiliary blocks 28 are in contact with each other, and judge whether to reset the device in turn, thereby further improving the convenience of inspection.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A four-cylinder engine balance shaft system, comprising a balance shaft body (1) and a four-cylinder drive device (2), characterized in that: A first toothed disc (3) is fixedly connected to the four-cylinder drive device (2), a second toothed disc (4) is fixedly connected to the surface of the balance shaft body (1), and the first toothed disc (3) is meshed with the second toothed disc (4); An inner shaft (5) is fixedly connected to the inner wall of the balancing shaft body (1); an eccentric housing (6) is fixedly connected to the shaft arm of the inner shaft (5); a counterweight (7) is arranged in the eccentric housing (6); and two auxiliary blocks (28) are slidably connected to the shaft arm of the inner shaft (5); The four-cylinder engine balance shaft system also includes: An adjusting component, the adjusting component being arranged on the eccentric housing (6) to control the distance between the counterweight (7) and the inner shaft (5); A switching component, the switching component being in driving connection with the adjusting component so as to control the speed of the displacement of the counterweight block (7) to change when the distance between the counterweight block (7) and the inner shaft (5) is changed; The auxiliary component is configured so that when the switching component is in operation, the two auxiliary blocks (28) perform circular arc displacement.

2. The four-cylinder engine balance shaft system according to claim 1, characterized in that: The adjusting component comprises: An adjusting shaft (8), wherein the shaft arm of the adjusting shaft (8) is rotatably connected to the inner wall of the eccentric housing (6), the shaft arm of the adjusting shaft (8) is fixedly connected to a rotating cylinder (9), the outer wall of the rotating cylinder (9) is provided with a displacement groove 1 (10) and a displacement groove 2 (11), the displacement groove 1 (10) and the displacement groove 2 (11) are symmetrically arranged, the groove walls of the displacement groove 1 (10) and the displacement groove 2 (11) are both slidably connected to a connecting block (12), the surfaces of the two connecting blocks (12) are both hinged with a hinge rod (13), the ends of the two hinge rods (13) are jointly hinged with an adjusting box (14), the inner wall of the eccentric housing (6) is provided with a cavity (15) for displacement of the adjusting box (14), and a counterweight bag (16) is embedded in the adjusting box (14).

3. The four-cylinder engine balance shaft system according to claim 2, characterized in that: The switching component comprises: A fixed shaft (17), the shaft arm of the adjusting shaft (8) is fixedly connected to an adjusting gear (18), the surface of the eccentric housing (6) is slidably connected to a slide plate (19), the inner wall of the slide plate (19) is rotatably connected to an inner toothed disc (20), the surface of the inner toothed disc (20) is fixedly connected to the shaft arm of the fixed shaft (17), the shaft arm of the fixed shaft (17) is fixedly connected to a switching gear (21), and the teeth of the inner toothed disc (20) mesh with the teeth of the adjusting gear (18); Also included are two sets of locking components arranged on the slide plate (19); The locking component comprises: A push rod (22), the push rod (22) is slidably connected to the inner wall of the slide plate (19), the end of the push rod (22) is fixedly connected to a spring (23), the end of the spring (23) is fixedly connected to the inner wall of the slide plate (19), the inner wall of the push rod (22) is provided with two groups of inclined grooves (24), the groove walls of the two groups of inclined grooves (24) are slidably connected to a locking shaft (25), and the shaft arm of the locking shaft (25) is fixedly connected to a locking rod (26).

4. The four-cylinder engine balance shaft system according to claim 3, characterized in that: Two locking openings (27) are provided on the surface of the eccentric housing (6), and the two locking openings (27) are adapted to the size of the locking rod (26).

5. The four-cylinder engine balance shaft system according to claim 4, characterized in that: The auxiliary components include: Two auxiliary rods (29), both of which are hinged on the surface of the slide plate (19), and ends of the two auxiliary rods (29) are respectively hinged on the surfaces of the two auxiliary blocks (28).

6. The four-cylinder engine balance shaft system according to claim 5, characterized in that: A transmission shaft (30) is fixedly connected to the surface of the inner gear disc (20), an axis arm of the transmission shaft (30) is rotatably connected to the inner wall of the slide plate (19), an end of the transmission shaft (30) is fixedly connected to a turning knob (31), and a surface of the turning knob (31) is provided with anti-slip patterns.

7. The four-cylinder engine balance shaft system according to any one of claims 4 to 6, characterized in that: The end of the push rod (22) is fixedly connected to a button (32), and the surface of the button (32) is provided with anti-slip patterns.

8. The four-cylinder engine balance shaft system according to claim 6, characterized in that: A load block (33) is fixedly connected to the surface of the eccentric housing (6), and the specifications of the load block (33) are compatible with the specifications of the slide plate (19).

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