How to operate the automobile fuel tank conversion valve

Abstract

The present invention discloses an operating method for an automobile fuel tank switching valve, which includes a housing, a gear transmission mechanism for driving a flat cam installed inside the housing, the flat cam being mounted on the outside of an oil channel shaft, the oil channel shaft being mounted inside the housing, the end face of the flat cam being machined with a cam groove, a cover plate being mounted on the housing, the oil channel shaft passing through the cover plate, and a total oil outlet being provided on the oil channel shaft outside the cover plate; a No. 1 oil inlet channel and a No. 2 oil inlet channel being provided on the housing, the flat cam being connected to a push rod switching device for switching the oil inlet connection between the two oil inlet channels. This switching valve adopts an automatic control method and can automatically switch between the two fuel tanks of the automobile, thereby improving switching efficiency. In addition, this switching valve has a simple structure and a stable working process, which improves its durability and extends its service life.

Description

[0001] This application is a divisional application. The original application number is: 201710267825.3. The original application invention name is: Automobile fuel tank conversion valve and operation method. The application date is: 2017-04-22. Technical Field

[0002] The invention belongs to the field of automobile fuel tank parts, and in particular relates to an operating method of an automobile fuel tank conversion valve. Background Art

[0003] At present, dual-tank vehicles usually have two fuel tanks. When the fuel in one tank is exhausted, the other tank needs to be opened. The existing switching valve structure is relatively complex, and most of them use manual switching valves to switch the oil circuit. Its switching efficiency is low, and its stability and durability are relatively poor. Therefore, it is necessary to design a switching valve for automatically switching between the two fuel tanks. Summary of the Invention

[0004] The present invention provides an operating method for an automobile fuel tank switching valve. The switching valve adopts an automatic control method and can automatically switch between two fuel tanks of the automobile, thereby improving switching efficiency. In addition, the switching valve has a simple structure and a stable working process, which improves its durability and extends its service life.

[0005] In order to solve the above technical problems, the present invention proposes the following technical solutions: an automobile fuel tank conversion valve, which includes a housing, a gear transmission mechanism for driving a flat cam is installed inside the housing, the flat cam is sleeved on the outside of the oil channel shaft, the oil channel shaft is installed inside the housing, the end face of the flat cam is processed with a cam groove, a cover plate is installed on the housing, the oil channel shaft passes through the cover plate, and a total oil outlet is provided on the oil channel shaft outside the cover plate; a No. 1 oil inlet channel and a No. 2 oil inlet channel are provided on the housing, and the flat cam is connected to a push rod switching device for switching the oil inlet connection between the two oil inlets.

[0006] The gear transmission mechanism includes a motor installed in a motor cavity inside the housing. A driving gear is installed on the output shaft of the motor. The driving gear and the driven gear on the outer edge of the planar cam form a gear meshing transmission.

[0007] The motor adopts a reduction servo motor, which is connected to a controller via a frequency converter. The controller is connected to a servo control button via a signal line to control the automatic rotation of the motor and its rotation phase angle.

[0008] There are two sets of push rod switching devices, including a first push rod switching device and a second push rod switching device; the two sets of push rod switching devices have the same structure; the first push rod switching device includes a push rod, and the two ends of the push rod are respectively supported on the positioning support holes on the oil channel shaft and the housing, and form a sliding fit. A ball mounting hole is processed on the end of the push rod that cooperates with the plane cam, and a ball is embedded and installed inside the ball mounting hole, and the ball and the cam groove form a rolling fit. A valve core is positioned and installed on the push rod through a shaft shoulder, and a return spring is set on the push rod between the valve core and the first oil channel plate, and a matching sealing ring is installed on the valve core, and the matching sealing ring cooperates with the end chamfer of the first oil channel and seals the first oil channel, thereby sealing and blocking the No. 2 oil inlet channel, and a plurality of first oil holes are evenly distributed on the first oil channel plate.

[0009] The structure of the second push rod switching device is the same as that of the first push rod switching device. The second push rod switching device cooperates with the second oil passage, the second oil passage plate and the second oil passage hole to switch the No. 1 oil inlet passage on and off.

[0010] A first sealing ring is provided between the cover plate and the oil channel shaft; a second sealing ring is provided between the matching end faces of the cover plate and the housing; and a third sealing ring is provided between the matching end faces of the oil channel shaft and the housing.

[0011] A fourth sealing ring is provided at the position where the ejector rods of the first ejector rod switching device and the second ejector rod switching device cooperate with the oil channel shaft.

[0012] The phase difference of the cam grooves on the end surface of the planar cam is 180 degrees, ensuring that when the planar cam rotates 180 degrees, the No. 1 oil inlet channel and the No. 2 oil inlet channel are in a closed state and an open state respectively.

[0013] The lower end surface of the planar cam is positioned and installed on the oil channel shaft through a positioning partition, and the upper end surface of the planar cam is positioned by a positioning ring, and the positioning ring is positioned and installed on the oil channel shaft through an elastic retaining ring, and the elastic retaining ring is installed on the shaft ring of the oil channel shaft.

[0014] The operating method of any one of the above-mentioned automobile fuel tank switching valves comprises the following steps:

[0015] The first step is to connect the No. 1 oil inlet and No. 2 oil inlet of the conversion valve to the first oil tank and the second oil tank through oil pipes, and connect the main oil outlet to the oil supply pipeline;

[0016] In the second step, the push rod of the second push rod switching device is initially located at the far end of the cam groove. At this time, the valve core of the second push rod switching device is pushed up by the return spring, so that the second oil passage is opened, thereby connecting the No. 1 oil inlet channel and the main oil outlet, and supplying oil to the oil supply pipeline;

[0017] In the third step, when the fuel in the first fuel tank is exhausted, the servo control button is pressed to rotate the motor, which in turn drives the planar cam to rotate, thereby rotating the phase angle of the planar cam 180 degrees. At this time, the phase angle of the cam slot is also changed by 180 degrees, causing the second push rod switching device to close the second oil passage and the first push rod switching device to open the first oil passage, thereby connecting the second oil inlet passage and the main oil outlet, and supplying oil to the oil supply pipeline;

[0018] In the fourth step, when the fuel in the second fuel tank is exhausted, the above operation process is repeated in the same way to finally realize the oil circulation supply of the two fuel tanks.

[0019] The present invention has the following beneficial effects:

[0020] 1. The three-way switching valve can automatically switch between the two fuel tanks, thereby ensuring that after the fuel in one tank is burned out, it automatically switches to the other tank through the flat cam, and finally ensures automatic switching between the two fuel tanks and smooth fuel supply.

[0021] 2. The motor can drive the driving gear, which can drive the plane cam, and the cam groove on the plane cam can drive the two push rod switching devices, thereby automatically switching between the first oil passage and the second oil passage, so that the No. 1 oil inlet channel and the No. 2 oil inlet channel are alternately connected to the main oil outlet, and the oil supply operation is carried out in sequence.

[0022] 3. Through the push rod switching device, during operation, the push rod cooperates with the cam groove of the flat cam to drive the push rod to move freely, thereby driving the matching sealing ring on the valve core to cooperate with the first oil passage and the second oil passage in a cyclic seal, and finally realizing the automatic connection between the No. 1 oil inlet passage, the No. 2 oil inlet passage and the total oil outlet, and realizing automatic switching between different oil tanks.

[0023] 4. The ball bearing provided at the end of the ejector rod can reduce the friction between the ejector rod and the cam groove, thereby playing a good role as a cam ejector rod.

[0024] 5. The 180-degree phase angle difference of the planar cam can ensure automatic switching between the two fuel tanks, realizing the alternating supply of fuel to the two tanks. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings and examples.

[0026] Figure 1 It is a main sectional view of the present invention.

[0027] Figure 2 The present invention Figure 1 Middle AA cross-section.

[0028] In the figure: housing 1, motor 2, motor cavity 3, threaded hole 4, cover plate 5, driving gear 6, output shaft 7, flat cam 8, cam groove 9, total oil outlet 10, oil channel shaft 11, first sealing ring 12, elastic retaining ring 13, positioning ring 14, positioning partition 15, second sealing ring 16, third sealing ring 17, No. 1 oil inlet channel 18, No. 2 oil inlet channel 19, second push rod switching device 20, second oil passage 21, second oil hole 22, second oil channel plate 23, first oil channel plate 24, first oil hole 25, first oil passage 26, return spring 27, matching sealing ring 28, valve core 29, push rod 30, fourth sealing ring 31, ball mounting hole 32, ball 33. DETAILED DESCRIPTION

[0029] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0030] Example 1:

[0031] like Figure 1-2 As shown, the automobile fuel tank switching valve includes a housing 1, within which is mounted a gear transmission mechanism that drives a flat cam 8. The flat cam 8 is mounted on the outside of an oil channel shaft 11, which is mounted within the housing 1. The end face of the flat cam 8 is machined with a cam groove 9. A cover plate 5 is mounted on the housing 1, through which the oil channel shaft 11 passes. A total oil outlet 10 is provided on the oil channel shaft 11 outside the cover plate 5. The housing 1 is provided with a first oil inlet 18 and a second oil inlet 19. The flat cam 8 is connected to a push rod switching device for switching the oil supply connection between the two oil inlet channels. During operation, the above-mentioned structure can drive the two push rod switching devices under the action of the flat cam 8, thereby automatically switching between the two oil inlet channels through the action of the two push rod switching devices.

[0032] Furthermore, the gear transmission mechanism includes a motor 2 mounted within a motor cavity 3 within the housing 1. A driving gear 6 is mounted on the output shaft 7 of the motor 2. This driving gear 6 forms a gear meshing transmission with a driven gear on the outer edge of a planar cam 8. During operation, the motor 2 drives the output shaft 7, which in turn drives the driving gear 6, which in turn drives the planar cam 8, which in turn drives the ejector rod switching device, achieving automatic switching between the two oil passages.

[0033] Furthermore, motor 2 utilizes a reduction servo motor, connected to a controller via a frequency converter. The controller, in turn, is connected to a servo control button via a signal line to control the automatic rotation of motor 2 and its rotational phase angle. During operation, the controller and frequency converter control the reduction servo motor, which in turn drives driving gear 6 to rotate a certain number of revolutions, thereby rotating planar cam 8 at a certain phase angle and cooperating with two ejector lever switching devices.

[0034] Furthermore, there are two sets of the push rod switching device, including a first push rod switching device and a second push rod switching device 20; the two sets of the push rod switching devices have the same structure; the first push rod switching device includes a push rod 30, the two ends of the push rod 30 are respectively supported on the positioning support holes on the oil channel shaft 11 and the housing 1, and form a sliding fit, and a ball mounting hole 32 is processed on the end of the push rod 30 that cooperates with the plane cam 8, and a ball 33 is embedded and installed inside the ball mounting hole 32, and the ball 33 forms a rolling fit with the cam groove 9. A valve core 29 is positioned and installed on the push rod 30 through a shaft shoulder, and a return spring 27 is sleeved on the push rod 30 between the valve core 29 and the first oil channel plate 24, and a matching sealing ring 28 is installed on the valve core 29, and the matching sealing ring 28 cooperates with the end chamfer of the first oil channel 26 and seals the first oil channel 26, thereby sealing and blocking the No. 2 oil inlet channel 19, and a plurality of first oil holes 25 are evenly distributed on the first oil channel plate 24. During operation, the plane cam 8 cooperates with the push rod 30 of the first push rod switching device and the second push rod switching device 20, and the valve core cooperates with the first oil passage 26 and the second oil passage 21 to finally achieve automatic switching between the two oil tanks.

[0035] Furthermore, the structure of the second push rod switching device 20 is the same as that of the first push rod switching device. The second push rod switching device 20 cooperates with the second oil passage 21, the second oil passage plate 23 and the second oil hole 22 to switch the No. 1 oil inlet passage 18 on and off.

[0036] Furthermore, a first sealing ring 12 is provided between the cover plate 5 and the oil channel shaft 11; a second sealing ring 16 is provided between the mating end surfaces of the cover plate 5 and the housing 1; and a third sealing ring 17 is provided between the mating end surfaces of the oil channel shaft 11 and the housing 1. During operation, these multiple sealing rings ensure sealing between the various components.

[0037] Furthermore, a fourth sealing ring 31 is provided at the position where the ejector rods of the first ejector rod switching device and the second ejector rod switching device 20 cooperate with the oil channel shaft 11 .

[0038] Furthermore, the phase difference of the cam groove 9 on the end surface of the planar cam 8 is 180 degrees, ensuring that when the planar cam 8 rotates 180 degrees, the first oil inlet passage 18 and the second oil inlet passage 19 are in the closed and open states respectively.

[0039] Furthermore, the lower end face of the planar cam 8 is positioned and mounted on the oil channel shaft 11 through a positioning baffle 15, and the upper end face of the planar cam 8 is positioned by a positioning ring 14, and the positioning ring 14 is positioned and mounted on the oil channel shaft 11 through an elastic retaining ring 13, and the elastic retaining ring 13 is mounted on the shaft ring of the oil channel shaft 11.

[0040] Example 2:

[0041] The operating method of any one of the above-mentioned automobile fuel tank switching valves comprises the following steps:

[0042] The first step is to connect the No. 1 oil inlet 18 and No. 2 oil inlet 19 of the conversion valve to the first oil tank and the second oil tank through oil pipes, and connect the main oil outlet 10 to the oil supply pipeline;

[0043] In the second step, initially, the push rod of the second push rod switching device 20 is located at the far end of the cam groove 9. At this time, the valve core of the second push rod switching device 20 is pushed up by the return spring, so that the second oil passage 21 is opened, thereby connecting the No. 1 oil inlet channel 18 and the main oil outlet 10, and supplying oil to the oil supply pipeline;

[0044] In the third step, when the fuel in the first fuel tank is exhausted, the servo control button is pressed to rotate the motor 2, which in turn drives the planar cam 8 to rotate, thereby causing the phase angle of the planar cam 8 to rotate 180 degrees. At this time, the phase angle of the cam slot 9 also changes 180 degrees, causing the second push rod switching device 20 to close the second oil passage 21 and the first push rod switching device to open the first oil passage 26. The second oil inlet passage 19 is connected to the main oil outlet 10, and oil is supplied to the oil supply pipeline.

[0045] In the fourth step, when the fuel in the second fuel tank is exhausted, the above operation process is repeated in the same way to finally realize the oil circulation supply of the two fuel tanks.

[0046] Based on the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this invention, and all of these changes and modifications are within the scope of protection of this invention. Matters not covered in this invention belong to the common knowledge of those skilled in the art.

Claims

1. The operating method of the automobile fuel tank conversion valve is characterized in that: The automobile fuel tank switching valve comprises a housing (1), wherein a gear transmission mechanism for driving a flat cam (8) is installed inside the housing (1), wherein the flat cam (8) is sleeved on the outside of an oil channel shaft (11), wherein the oil channel shaft (11) is installed inside the housing (1), wherein an end face of the flat cam (8) is machined with a cam groove (9), wherein a cover plate (5) is installed on the housing (1), wherein the oil channel shaft (11) passes through the cover plate (5), and wherein a total oil outlet (10) is provided on the oil channel shaft (11) outside the cover plate (5); wherein a No. 1 oil inlet passage (18) and a No. 2 oil inlet passage (19) are provided on the housing (1), wherein the flat cam (8) is connected to a push rod switching device for switching oil inlet connection between the two oil inlet passages; The gear transmission mechanism comprises a motor (2), the motor (2) being mounted inside a motor cavity (3) inside a housing (1), a driving gear (6) being mounted on an output shaft (7) of the motor (2), and the driving gear (6) and a driven gear on the outer edge of a planar cam (8) forming a gear meshing transmission; There are two sets of push rod switching devices, including a first push rod switching device and a second push rod switching device (20); the two sets of push rod switching devices have the same structure; the first push rod switching device includes a push rod (30), the two ends of the push rod (30) are respectively supported on the oil channel shaft (11) and the positioning support holes on the housing (1), and form a sliding fit, and a ball mounting hole (32) is processed on one end of the push rod (30) that matches the plane cam (8), and a ball (33) is embedded and installed inside the ball mounting hole (32), and the ball (33) is aligned with the cam groove. (9) forming a rolling fit, a valve core (29) is mounted on the push rod (30) through a shaft shoulder, a return spring (27) is sleeved on the push rod (30) between the valve core (29) and the first oil passage plate (24), a matching sealing ring (28) is mounted on the valve core (29), the matching sealing ring (28) is matched with the end chamfer of the first oil passage (26) and seals the first oil passage (26), thereby sealing the second oil inlet passage (19), and a plurality of first oil holes (25) are evenly distributed on the first oil passage plate (24); The structure of the second push rod switching device (20) is the same as that of the first push rod switching device. The second push rod switching device (20) cooperates with the second oil passage (21), the second oil passage plate (23) and the second oil passage hole (22) to switch the first oil inlet passage (18) on and off. The cam groove (9) on the end surface of the planar cam (8) has a phase difference of 180 degrees, ensuring that when the planar cam (8) rotates 180 degrees, the first oil inlet passage (18) and the second oil inlet passage (19) are in a closed state and an open state, respectively; The operation method comprises the following steps: The first step is to connect the No. 1 oil inlet passage (18) and the No. 2 oil inlet passage (19) of the conversion valve to the first oil tank and the second oil tank through oil pipes, and connect the main oil outlet (10) to the oil supply pipeline; In the second step, initially, the push rod of the second push rod switching device (20) is located at the far end of the cam groove (9). At this time, the valve core of the second push rod switching device (20) is lifted up by the return spring, so that the second oil passage (21) is opened, thereby connecting the No. 1 oil inlet passage (18) and the main oil outlet (10), and supplying oil to the oil supply pipeline; The third step is that when the fuel in the first fuel tank is exhausted, the servo control button is pressed to rotate the motor (2), thereby driving the plane cam (8) to rotate, thereby rotating the phase angle of the plane cam (8) by 180 degrees. At this time, the phase angle of the cam groove (9) is also converted by 180 degrees, so that the second push rod switching device (20) closes the second oil passage (21), and the first push rod switching device opens the first oil passage (26), thereby connecting the second oil inlet passage (19) and the main oil outlet (10), and supplying oil to the oil supply pipeline; In the fourth step, when the fuel in the second fuel tank is exhausted, the above operation process is repeated in the same way to finally realize the oil circulation supply of the two fuel tanks.

2. The method for operating the automobile fuel tank switching valve according to claim 1, characterized in that: The motor (2) adopts a reduction servo motor, the reduction servo motor is connected to a controller via a frequency converter, and the controller is connected to a servo control button via a signal line to control the automatic rotation of the motor (2) and the phase angle of its rotation.

3. The method for operating the automobile fuel tank switching valve according to claim 1, characterized in that: A first sealing ring (12) is provided between the cover plate (5) and the oil channel shaft (11); a second sealing ring (16) is provided between the end faces of the cover plate (5) and the housing (1); and a third sealing ring (17) is provided between the end faces of the oil channel shaft (11) and the housing (1).

4. The method for operating the automobile fuel tank switching valve according to claim 1, characterized in that: A fourth sealing ring (31) is provided at the position where the ejector rods of the first ejector rod switching device and the second ejector rod switching device (20) cooperate with the oil channel shaft (11).

5. The method for operating the automobile fuel tank switching valve according to claim 1, characterized in that: The lower end surface of the planar cam (8) is positioned and mounted on the oil channel shaft (11) via a positioning partition (15), and the upper end surface of the planar cam (8) is positioned via a positioning ring (14). The positioning ring (14) is positioned and mounted on the oil channel shaft (11) via an elastic retaining ring (13). The elastic retaining ring (13) is mounted on a shaft collar of the oil channel shaft (11).

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