A mechanical fuel supply mechanism and control method for a hybrid transmission

Abstract

The present invention discloses a mechanical fuel supply mechanism for a hybrid transmission, including a vehicle power output assembly. The vehicle power output assembly includes a housing, a support bearing is arranged on the housing, an output gear is installed outside the support bearing, a driving wheel is arranged on the output gear, and a differential is arranged in the housing. The layout of each component is reasonable, and the space utilization rate is high, which is conducive to installation and arrangement in the limited space of a hybrid vehicle, and has high reliability. The power transmission between the driving and driven wheels of the oil pump adopts a toothed chain to ensure the stability and reliability of power transmission. Its deformation increases control and other transmission components, which can prevent the synchronous belt from being connected to non-target variable speed transmission gear components, avoid transmission failures, and is convenient to control. At the same time, since the added angle adjustment component and adjustment gear component both adopt an electric drive mode, it is convenient to realize automatic control through an electronic control system, improving the response speed and control accuracy of the system.

Description

Technical Field

[0001] The present invention relates to the technical field of hybrid vehicles, and particularly to a mechanical oil supply mechanism and a control method for a hybrid transmission case. Background Art

[0002] In hybrid vehicles, the oil supply demand of the oil pump often changes with the operating conditions of the vehicle. Traditional oil supply mechanisms for hybrid transmission cases usually adopt oil pumps with fixed speeds, and it is difficult to flexibly adjust the oil supply volume according to actual demands. When the vehicle is in different driving states, such as idling, accelerating, or driving at high speeds, the oil pump with a fixed speed may result in too much or too little oil supply, thus affecting the performance and efficiency of the hybrid system. Excessive oil supply will cause energy waste, while insufficient oil supply may lead to problems such as insufficient lubrication of components and poor cooling effect, shortening the service life of components.

[0003] Therefore, there is a need for an oil supply mechanism that can flexibly adjust the rotation speed of the oil pump according to the actual operating conditions of the vehicle, so as to improve the performance and efficiency of the hybrid system, reduce energy consumption, and extend the service life of components.

[0004] Therefore, the existing technologies in the field of hybrid vehicles need to be further improved. Summary of the Invention

[0005] The purpose of the present invention is to provide a mechanical oil supply mechanism and a control method for a hybrid transmission case, which can realize the power input from the vehicle power output component to the input shaft of the oil pump motor or change the rotation speed of the input shaft, so as to flexibly adjust the oil supply volume of the oil pump according to different operating conditions of the vehicle, improve the performance and efficiency of the hybrid system, and reduce energy consumption.

[0006] To achieve the above purpose, the present invention adopts the following solutions:

[0007] A mechanical oil supply mechanism for a hybrid transmission case includes a vehicle power output component. On one side of the vehicle power output component, there is an input shaft of an oil pump motor. An angle rotation component fixedly connected to the vehicle power output component is sleeved outside the input shaft of the oil pump motor. A plurality of variable speed gear components with different diameters are evenly distributed around the center of the angle rotation component on the angle rotation component. A transmission gear component for meshing with the variable speed gear components at different angles is arranged at the upper end of the input shaft of the oil pump motor. Adjusting gear components are arranged on both sides of the angle rotation component;

[0008] A driving wheel is arranged at the output end of the vehicle power output component;

[0009] It further includes a synchronous belt. The synchronous belt is connected to the driving wheel, the two adjusting gear components, and one of the outermost variable speed gear components. The two adjusting gear components are used to stretch the synchronous belt to prevent the synchronous belt from connecting the remaining variable speed gear components.

[0010] Furthermore, the angle rotation assembly includes a fixed sleeve fixedly connected to the vehicle power output assembly, the circumferential outer wall of the fixed sleeve is provided with an annular groove, the annular groove is sleeved with a rotating ring body that can rotate an angle, and the outer wall of the fixed sleeve is provided with an angle adjustment assembly.

[0011] Furthermore, the angle adjustment assembly includes a driving motor arranged on one side of the fixed sleeve, a driving gear is arranged at the output end of the driving motor, a passive gear is arranged on the circumferential outer wall of the rotating ring body, and the driving gear and the passive gear are meshed for transmission.

[0012] Furthermore, the speed change gear assembly includes a shaft seat arranged on the rotating ring body, a rotating shaft is rotatably installed in the shaft seat, and a speed change gear is arranged at the end of the rotating shaft.

[0013] Furthermore, the transmission gear assembly includes a first transmission gear, a second transmission gear and a third transmission gear which are arranged on the upper end of the oil pump motor input shaft.

[0014] Furthermore, the number of the speed gears is three; the first transmission gear, the second transmission gear and the third transmission gear are stacked from top to bottom and are respectively meshed with a corresponding one of the speed gears for transmission;

[0015] The three speed change gears are arranged in a stacked manner from top to bottom.

[0016] Furthermore, the adjusting gear assembly comprises an electric guide rail arranged on the side wall of the fixed shaft sleeve, an electric slider is movably arranged in the electric guide rail, and an opening and closing gear is arranged on the electric slider.

[0017] Furthermore, the vehicle power output assembly includes a housing, a support bearing is provided on the housing, an output gear is installed on the outer sleeve of the support bearing, the driving wheel is provided on the output gear, a differential is provided in the housing, and a sprocket thrust bearing and a thrust bearing are provided between the output gear and the differential.

[0018] Furthermore, an oil pump is connected to the lower end of the oil pump motor input shaft.

[0019] A control method,

[0020] The following steps are included:

[0021] S1, detecting the current vehicle speed, providing a control module, and transmitting the real-time speed measurement information to the control module;

[0022] S2, the control module adjusts the rotation speed of the oil pump motor input shaft required by the oil pump according to the current vehicle speed information to ensure that the oil output and consumption are the same;

[0023] S3. The control module sends commands to the drive motor and the electric guide rail to operate, controlling the rotation amount of the drive motor and the displacement rotation amount of the electric guide rail;

[0024] S4. When the vehicle speed is relatively fast, the input shaft of the oil pump motor needs to rotate faster. At this time, different speed-changing gears are controlled to engage with the synchronous belt to achieve power input to the input shaft of the oil pump motor, and speed change is achieved by engaging different speed-changing gears to input to the input shaft of the oil pump motor;

[0025] S5. Since different speed-changing gears have different tension requirements for the synchronous belt when engaging with the synchronous belt, and at the same time, it is necessary to prevent the horizontally passing synchronous belt from touching other idling speed-changing gears, the electric guide rail is controlled to change the lateral displacement amount of the electric slider, thereby changing the opening and closing distance of the opening and closing gears.

[0026] In summary, the beneficial effects of the present invention compared with the prior art are as follows:

[0027] The present invention solves the deficiencies existing in the prior art in the technical field of hybrid vehicles. Through the structural arrangement of the present invention, it has the following advantages: the rotation speed is adjustable. By adjusting the angle rotation assembly, different-diameter speed-changing transmission gear assemblies are engaged with the transmission gear assembly, thereby changing the rotation speed of the input shaft of the oil pump motor and realizing flexible adjustment of the oil supply amount of the oil pump to adapt to different operating conditions of the vehicle. The structure is compact, the layout of each component is reasonable, and the space utilization rate is high, which is beneficial to installation and arrangement in the limited space of hybrid vehicles; the reliability is high. The cooperation of the synchronous belt and the adjustment gear assembly is adopted to ensure the stability and reliability of power transmission. At the same time, it prevents the synchronous belt from being connected to non-target speed-changing transmission gear assemblies, avoiding transmission failures. The control is convenient. Both the angle adjustment assembly and the adjustment gear assembly adopt electric drive methods, which are convenient for realizing automatic control through an electronic control system, improving the response speed and control accuracy of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a cross-sectional view of the mechanical oil supply mechanism of the hybrid box of the present invention;

[0029] Figure 2 It is a top view of the mechanical oil supply mechanism of the hybrid box of the first embodiment of the present invention;

[0030] Figure 3 It is a top view of the mechanical oil supply mechanism of the hybrid box of the second embodiment of the present invention;

[0031] Figure 4 It is a three-dimensional view of the parts of the present invention;

[0032] Figure 5 It is a top view of the parts of the present invention;

[0033] Figure 6It is a sectional view of the parts of the present invention. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Please refer to Figures 1-6 , the present invention provides a mechanical oil supply mechanism for a hybrid box, including a vehicle power output assembly 1. The vehicle power output assembly 1 includes a housing 101, and further includes a driving wheel 8. A support bearing 102 is arranged on the housing 101, an output gear 103 is installed outside the support bearing 102, the driving wheel 8 is arranged on the output gear 103, a differential 104 is arranged in the housing 101, a sprocket thrust bearing 105 and a thrust bearing 106 are arranged between the output gear 103 and the differential 104. One side of the vehicle power output assembly 1 is provided with an oil pump motor input shaft 2, and an adjustable speed gear assembly 1000 is arranged between the vehicle power output assembly 1 and the oil pump motor input shaft 2; a transmission assembly is connected between the vehicle power output assembly 1, two of the adjustment gear assemblies 6 and one of the variable speed gear assemblies 4. The power transmission of the oil pump driving main and driven wheels adopts a toothed chain; its deformation increase control and other transmission components can prevent the synchronous belt from being connected to non-target variable speed transmission gear components, avoid transmission failures, and is convenient to control. At the same time, since the added angle adjustment assembly and the adjustment gear assembly both adopt an electric drive mode, it is convenient to realize automatic control through an electronic control system, improving the response speed and control accuracy of the system.

[0036] The present invention further includes an output sprocket, a transmission gear 107, a driving sprocket 110, a driving sprocket bearing 108, an oil pump 100, a driven sprocket 111, an oil pump chain and a housing 101; the output sprocket is installed on the housing 101 through the support bearing 102, and the output sprocket is connected to the transmission gear 107 through a spline; the driving sprocket 110 is supported on the output sprocket through the driving sprocket bearing 108, the thrust bearing 106 prevents interference between the output sprocket and the driving sprocket 110, and there is a spline on the circumferential end face of the driving sprocket 110; the oil pump 100 is connected to the driven sprocket 111 through a spline.

[0037] The mechanical fuel supply mechanism of a hybrid box with adjustable speed gears includes a vehicle power output component 1. On one side of the vehicle power output component 1, there is an oil pump motor input shaft 2. The adjustable speed gear component 1000 includes an angular rotation component 3 fixedly sleeved outside the oil pump motor input shaft 2. A plurality of variable speed gear components 4 with different diameters are evenly distributed around the center of the angular rotation component 3 on the angular rotation component 3. At the upper end of the oil pump motor input shaft 2, there is a transmission gear component 5 for meshing with the variable speed gear components 4 at different angles. On both sides of the angular rotation component 3, there is an adjustment gear component 6 each;

[0038] The output end of the vehicle power output component 1 is provided with a driving wheel 8;

[0039] It also includes a synchronous belt 7. The synchronous belt 7 is connected to the driving wheel 8, the two adjustment gear components 6, and one of the outermost variable speed gear components 4. The two adjustment gear components 6 are used to stretch the synchronous belt 7 to prevent the synchronous belt 7 from connecting the remaining variable speed gear components 4;

[0040] When the vehicle power output component 1 works, power is output through the driving wheel 8 and transmitted to the variable speed gear 403 of the variable speed transmission gear component 4 connected to the synchronous belt 7 through the synchronous belt 7. The variable speed gear 403 meshes with the corresponding transmission gear of the transmission gear component 5, and the power is transmitted to the oil pump motor input shaft 2, thereby driving the oil pump to work.

[0041] When it is necessary to change the speed of the oil pump motor input shaft 2, the electronic control system sends a control signal to the driving motor 3041. The driving motor 3041 drives the driving gear 3042 to rotate. Through the meshing transmission of the driving gear 3042 and the driven gear 3043, the rotating ring body 303 rotates a certain angle in the annular groove 302, adjusts the target variable speed transmission gear component 4 to the outermost position, and meshes it with the synchronous belt 7. The remaining non-target variable speed transmission gear components 4 cannot mesh with the synchronous belt 7, realizing the change of speed input.

[0042] During the angle adjustment, the electronic control system controls the movement of the electric slider 602 in the electric guide rail 601 according to the position of the target variable speed transmission gear component 4, and adjusts the distance between the two opening and closing gears 603. The purpose is that when the synchronous belt 7 is connected to variable speed gears 403 with different diameters, the tension of the synchronous belt 7 is different, and the tension control is completed by adjusting the position of the opening and closing gears 603;

[0043] The synchronous belt 7 accurately connects the target variable speed transmission gear component 4 and stretches the synchronous belt 7 to prevent it from connecting the remaining variable speed transmission gear components 4.

[0044] When the vehicle is idling, the demand for the fuel supply of the fuel pump is relatively low. The angle rotation assembly 3 meshes the variable speed transmission gear assembly 4 with a smaller diameter with the transmission gear assembly 5, reducing the rotational speed of the input shaft 2 of the fuel pump motor, thereby reducing the fuel supply of the fuel pump and lowering the energy consumption.

[0045] When accelerating the vehicle, a larger fuel supply of the fuel pump is required. The angle rotation assembly 3 meshes the variable speed transmission gear assembly 4 with a larger diameter with the transmission gear assembly 5, increasing the rotational speed of the input shaft 2 of the fuel pump motor and increasing the fuel supply of the fuel pump to meet the lubrication and cooling requirements of the vehicle.

[0046] According to the specific requirements of the vehicle, a variable speed transmission gear assembly 4 with a suitable diameter can be selected to mesh with the transmission gear assembly 5, keeping the fuel supply of the fuel pump at a reasonable level, meeting the system requirements and avoiding energy waste.

[0047] The angle rotation assembly 3 described in the present invention includes a fixed shaft sleeve 301 fixedly connected to the vehicle power output assembly 1. An annular groove 302 is provided on the circumferential outer wall of the fixed shaft sleeve 301. A rotating ring body 303 capable of rotating an angle is sleeved on the annular groove 302. An angle adjustment assembly 304 is provided on the outer wall of the fixed shaft sleeve 301.

[0048] The angle adjustment assembly 304 described in the present invention includes a driving motor 3041 provided on one side of the fixed shaft sleeve 301. A driving gear 3042 is provided at the output end of the driving motor 3041. A driven gear 3043 is provided on the circumferential outer wall of the rotating ring body 303. The driving gear 3042 and the driven gear 3043 are in meshing transmission.

[0049] The variable speed gear assembly 4 described in the present invention includes a shaft seat 401 provided on the rotating ring body 303. A rotating shaft 402 is rotatably installed in the shaft seat 401. A variable speed gear 403 is provided at the end of the rotating shaft 402.

[0050] The transmission gear assembly 5 described in the present invention includes a first transmission gear 501, a second transmission gear 502, and a third transmission gear 503 provided at the upper end of the input shaft 2 of the fuel pump motor.

[0051] The number of the variable speed gears 403 described in the present invention is three; the first transmission gear 501, the second transmission gear 502, and the third transmission gear 503 are stacked from top to bottom and are respectively in meshing transmission with one corresponding variable speed gear 403;

[0052] The three variable speed gears 403 are stacked from top to bottom.

[0053] The adjustment gear assembly 6 of the present invention includes an electric guide rail 601 provided on the side wall of the fixed bushing 301. An electric slider 602 is movably arranged in the electric guide rail 601, and a closing and opening gear 603 is arranged on the electric slider 602.

[0054] The vehicle power output assembly 1 of the present invention includes a housing 101. A support bearing 102 is provided on the housing 101. An output gear 103 is installed outside the support bearing 102. The driving wheel 8 is arranged on the output gear 103. A differential 104 is arranged in the housing 101. A sprocket thrust bearing 105 and a thrust bearing 106 are arranged between the output gear 103 and the differential 104;

[0055] The working principle of the mechanical oil supply mechanism of this hybrid box is realized based on power transmission and speed coupling, which is specifically as follows:

[0056] Initial power transmission: The output sprocket, as the initial power end, is installed on the housing through a support bearing and is connected to the transmission gear by a spline. The power from the output sprocket is transmitted to the transmission gear through the spline.

[0057] Power split transmission: The transmission gear directly transmits the power to the differential housing. Part of the power obtained by the differential housing is output to the wheel end to drive the vehicle to travel; the other part is transmitted to the driving sprocket through a spline. The driving sprocket is supported on the output sprocket by a driving sprocket bearing, and the sprocket thrust bearing prevents interference between the two, so that the output sprocket and the driving sprocket can drive at different speeds.

[0058] Obtaining power for the oil pump: The output sprocket transmits the power to the driven sprocket through an oil pump chain. The driven sprocket is connected by a spline and outputs the power to the oil pump, thereby driving the oil pump to work. When the vehicle speed is relatively high, the rotation speed of the output sprocket increases, and the power transmitted to the oil pump increases, and the oil supply of the oil pump increases, providing more lubricating oil for the entire transmission system; when the vehicle speed is relatively low, the mechanical pump rotates slowly and has low loss. At this time, the electric pump can work to meet the system's demand for pressure oil.

[0059] The lower end of the input shaft 2 of the oil pump motor of the present invention is connected to an oil pump 100.

[0060] A control method for adjustable rotation speed gears includes the following steps

[0061] S1. Detect the current vehicle speed. There is a control module, and the real-time speed measurement information is transmitted to the control module;

[0062] S2. The control module adjusts the rotation speed of the input shaft 2 of the oil pump motor required by the oil pump 100 according to the current vehicle speed information to ensure that the oil output and consumption are the same;

[0063] S3. The control module sends commands to the drive motor 3041 and the electric guide rail 601 to operate, and controls the rotation amounts of the drive motor 3041 and the electric guide rail 601.

[0064] S4. When the vehicle speed is relatively high, the input shaft 2 of the oil pump motor needs to rotate faster. At this time, different speed-changing gears 403 are controlled to engage with the synchronous belt 7 to achieve power input to the input shaft 2 of the oil pump motor, and speed change is achieved by engaging different speed-changing gears 403 and inputting the speed change to the input shaft 2 of the oil pump motor.

[0065] S5. Since different speed-changing gears 403 require different tension forces for the synchronous belt 7 when engaging with the synchronous belt 7, and at the same time, it is also necessary to prevent the horizontally passing synchronous belt 7 from touching other idling speed-changing gears 403, the electric guide rail 601 is controlled to change the lateral displacement amount of the electric slider 602, thereby changing the opening and closing distance of the opening and closing gear 603.

[0066] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A mechanical fuel supply mechanism for a hybrid transmission, comprising a vehicle power output assembly (1), characterized in that: The vehicle power output assembly (1) includes a housing (101). A support bearing (102) is provided on the housing (101). An output gear (103) is installed outside the support bearing (102). It further includes a driving wheel (8). The driving wheel (8) is arranged on the output gear (103). A differential (104) is provided inside the housing (101). A sprocket thrust bearing (105) and a thrust bearing (106) are arranged between the output gear (103) and the differential (104). An adjustable speed gear assembly (1000) is arranged between the vehicle power output assembly (1) and the oil pump motor input shaft (2). On one side of the vehicle power output assembly (1), there is an oil pump motor input shaft (2). The adjustable speed gear assembly (1000) includes an angular rotation assembly (3) fixedly sleeved outside the oil pump motor input shaft (2). A plurality of variable speed gear assemblies (4) with different diameters are evenly distributed around the center of the angular rotation assembly (3) on the angular rotation assembly (3). A transmission gear assembly (5) for engaging the variable speed gear assemblies (4) at different angles is arranged at the upper end of the oil pump motor input shaft (2). Adjusting gear assemblies (6) are arranged on both sides of the angular rotation assembly (3). A transmission assembly is connected between the vehicle power output assembly (1), the two adjusting gear assemblies (6), and one of the variable speed gear assemblies (4). The transmission assembly includes a driving wheel (8) arranged at the output end of the vehicle power output assembly (1). It further includes a synchronous belt (7). The synchronous belt (7) is connected to the driving wheel (8), the two adjusting gear assemblies (6), and one of the outermost variable speed gear assemblies (4). The two adjusting gear assemblies (6) are used to stretch the synchronous belt (7) to prevent the synchronous belt (7) from connecting the remaining variable speed gear assemblies (4). The angular rotation assembly (3) includes a fixed shaft sleeve (301) fixedly connected to the vehicle power output assembly (1). An annular groove (302) is provided on the circumferential outer wall of the fixed shaft sleeve (301). A rotatable ring body (303) that can rotate an angle is sleeved on the annular groove (302). An angle adjustment assembly (304) is arranged on the outer wall of the fixed shaft sleeve (301). The angle adjustment assembly (304) includes a driving motor (3041) arranged on one side of the fixed shaft sleeve (301). A driving gear (3042) is arranged at the output end of the driving motor (3041). A driven gear (3043) is arranged on the circumferential outer wall of the rotatable ring body (303). The driving gear (3042) and the driven gear (3043) are in meshing transmission.

2. The mechanical fuel supply mechanism of a hybrid gearbox according to claim 1, characterized in that: It further includes an output sprocket, a transmission gear (107), a driving sprocket (110), a driving sprocket bearing (108), an oil pump (100), a driven sprocket (111), an oil pump chain, and a housing (101); the output sprocket is mounted on the housing (101) through the support bearing (102), and the output sprocket is connected to the transmission gear (107) through a spline; the driving sprocket (110) is supported on the output sprocket through the driving sprocket bearing (108), the thrust bearing (106) prevents interference between the output sprocket and the driving sprocket (110), and there is a spline on the circumferential end face of the driving sprocket (110); the oil pump (100) is connected to the driven sprocket (111) through a spline.

3. The mechanical oil supply mechanism of a hybrid transmission according to claim 2, characterized in that: The speed-changing gear assembly (4) includes a shaft seat (401) provided on the rotating ring body (303), a rotating shaft (402) is rotatably installed in the shaft seat (401), and a speed-changing gear (403) is provided at the end of the rotating shaft (402).

4. A mechanical oil supply mechanism for a hybrid transmission according to claim 3, characterized in that: The transmission gear assembly (5) includes a first transmission gear (501), a second transmission gear (502), and a third transmission gear (503) provided at the upper end of the input shaft (2) of the oil pump motor.

5. The mechanical fuel supply mechanism of a hybrid transmission according to claim 4, wherein: The number of the speed-changing gears (403) is three; the first transmission gear (501), the second transmission gear (502), and the third transmission gear (503) are stacked from top to bottom and are respectively meshed and driven with a corresponding one of the speed-changing gears (403); The three speed-changing gears (403) are stacked from top to bottom.

6. The mechanical oil supply mechanism of a hybrid transmission according to claim 5, characterized in that: The adjustment gear assembly (6) includes an electric guide rail (601) provided on the side wall of the fixed shaft sleeve (301), an electric slider (602) is movably provided in the electric guide rail (601), and a closing and opening gear (603) is provided on the electric slider (602); The oil pump (100) is connected to the lower end of the input shaft (2) of the oil pump motor.

7. A control method, including the hybrid box mechanical oil supply mechanism according to claim 6, characterized in that: It includes the following steps, S1. Detect the current vehicle speed, there is a control module, and transmit the real-time speed measurement information to the control module; S2. The control module adjusts the rotation speed of the input shaft (2) of the oil pump motor required by the oil pump (100) according to the current vehicle speed information to ensure that the oil output and consumption are the same; S3. The control module sends commands to the drive motor (3041) and the electric guide rail (601) to work, and controls the rotation amount of the drive motor (3041) and the displacement amount of the electric guide rail (601); S4. When the vehicle speed is relatively fast, the rotation of the input shaft (2) of the oil pump motor needs to be faster. At this time, control different speed-changing gears (403) to engage the synchronous belt (7) to realize power input to the input shaft (2) of the oil pump motor, and realize speed change input to the input shaft (2) of the oil pump motor through engaging different speed-changing gears (403) to realize speed change; S5. Since different speed-changing gears (403) require different tension forces for the synchronous belt (7) when engaging with the synchronous belt (7), and it is also necessary to prevent the laterally passing synchronous belt (7) from touching other idling speed-changing gears (403), the electric guide rail (601) is controlled to change the lateral displacement of the electric slider (602), thereby changing the opening and closing distance of the opening and closing gear (603).

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