Double-electromagnetic-valve oil way protection device

Abstract

The utility model relates to the technical field of clutch control, in particular to a double-electromagnetic-valve oil way protection device. The device comprises a valve body, two main oil ways are formed in the valve body, a mounting hole penetrating through the valve body and two oil outlets in one-to-one correspondence with the two main oil ways are formed in the valve body, a bush is arranged in the mounting hole, and a valve element is slidably connected into the bush. The valve element is provided with a first working position, a second working position and a third working position which are sequentially distributed in the axial direction of the lining. When the valve element is located at the first working position and the third working position, the two main oil ways communicate with the corresponding oil outlets through the valve element correspondingly, and when the valve element is located at the second working position, the valve element blocks a passage between the two first through holes and the corresponding second through holes. When the two electromagnetic valves are connected at the same time, the pressure oil drives the valve element to be located at the second working position, so that the valve element blocks the channels from the two main oil ways to the corresponding oil outlets, and the effect of preventing the two clutches from being connected and arranged at the same time is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of clutch control, and particularly relates to a double-solenoid valve oil circuit protection device. Background Art

[0002] In a marine gearbox, in order to avoid the solenoid valve losing power when the ship suddenly loses power during high-speed navigation, which may cause the clutch to burn out at high speeds, a solenoid valve with a power-off protection function is usually used. When the solenoid valve with a power-off protection function is used for electric connection, in case of sudden power failure, it can maintain the state of the solenoid valve unchanged and keep the state before power-off, which is beneficial to protecting the clutch.

[0003] At present, in a marine gearbox with a dual clutch, the oil circuits of the two clutches are independent of each other, and the two oil circuits are respectively controlled by two solenoid valves with a power-off protection function to respectively control the connection or disconnection of the two clutches. When a gearbox with a dual clutch uses two solenoid valves with a power-off protection function at the same time, since the two oil circuits are independent of each other and have no safety interlock function, there is a risk of the two clutches being connected at the same time due to misoperation in case of an emergency. Summary of the Utility Model

[0004] Aiming at the above defects, the technical problem to be solved by the utility model is to provide a double-solenoid valve oil circuit protection device, which can avoid the two oil circuits being connected at the same time, so as to avoid the risk of the two clutches being connected at the same time.

[0005] The above technical object of the utility model is achieved by the following technical solutions:

[0006] A double-solenoid valve oil circuit protection device, including a valve body. Two main oil circuits are provided inside the valve body. The inlets of the main oil circuits are located on the surface of the valve body. The valve body is provided with an installation hole penetrating through the valve body, and two oil outlets corresponding to the two main oil circuits one by one. Both ends of the installation hole are blocked by plug bodies. The outlet of the main oil circuit is communicated with the installation hole. A bushing is provided inside the installation hole. Two first through holes corresponding to the outlets of the two main oil circuits one by one, and second through holes corresponding to the two oil outlets one by one are provided on the bushing. A valve core is slidably connected inside the bushing. The valve core matches the bushing. Two oil channels are provided on the valve core. Limit columns are provided at both ends of the valve core. The diameter of the limit column is smaller than the diameter of the valve core. Elastic members are provided between both ends of the valve core and the corresponding plug bodies. Branch oil circuits corresponding to the two main oil circuits one by one are also provided inside the valve body. The outlet of the branch oil circuit is communicated with the installation hole. The outlets of the two branch oil circuits correspond to the two limit columns one by one. The valve core has a first working position, a second working position, and a third working position sequentially distributed along the axial direction of the bushing. When the valve core is in the first working position, the oil channel near the first end of the valve core is communicated with the adjacent first through hole and the second through hole. When the valve core is in the second working position, the valve core blocks the passage between the two first through holes and the corresponding second through holes. When the valve core is in the third working position, the oil channel near the second end of the valve core is communicated with the adjacent first through hole and the second through hole.

[0007] By adopting the above scheme, during use, two solenoid valves are installed on the valve body. The oil outlet ends of the two solenoid valves are communicated with the inlets of the corresponding main oil circuits. When both solenoid valves are turned on, pressure oil is introduced into both main oil circuits. The pressure oil enters the space jointly enclosed by the corresponding limit column, installation hole, plug body, and valve core through the corresponding main oil circuit and branch oil circuit. The pressure oil exerts a force on the valve core. Since the two forces are equal in magnitude and opposite in direction, the valve core will not move. Under the elastic force of the two elastic members, the valve core moves to the second working position. Since the valve core is subjected to the same axial pressure of the pressure oil at both ends, this enables the valve core to remain in place after moving to the second working position, thereby blocking the passage between the two first through holes and the corresponding second through holes, and neither of the two oil outlets will discharge oil, thus achieving the effect of preventing the two clutches from engaging and disengaging simultaneously.

[0008] Preferably, a retaining ring is sleeved on the limit post, and the retaining ring can slide relative to the limit post. When the valve core is in the second working position, both sides of the retaining ring are respectively abutted against the bushing and the corresponding elastic member. When the valve core is in the second working position, the elastic member abuts against the retaining ring, and the retaining ring abuts against the bushing. The retaining ring and the bushing bear the elastic force of the elastic member, which enables the valve core to be stably held in this position after being in the second working position. When the elastic force of one of the elastic members has a certain loss after working for a period of time and the elastic forces of the two elastic members are not equal, it is easy to cause the valve core to deviate from the second working position. However, since the retaining ring limits the stroke of the single-sided elastic member to push the valve core, it can ensure that the valve core can move to the second working position.

[0009] Preferably, the elastic member is a spring, and one end of the spring is sleeved on the limit post. Using a spring as the elastic member and sleeving one end on the limit post enables the spring to stably provide elastic force to the valve core.

[0010] Preferably, an oil drain hole is provided on the bushing, which is located between two first through holes and between two second through holes. A first oil drain channel communicating with the oil drain hole is provided on the valve body, and the outlet of the first oil drain channel is opened on the surface of the valve body. After the pressure oil in the main oil circuit enters the gap between the bushing and the valve core, it can enter the first oil drain channel through the oil drain hole on the bushing, and then the pressure oil can be connected to the oil tank outside the valve body through the first oil drain channel for continued use.

[0011] Preferably, an oil drain groove is circumferentially provided on the inner side of the bushing, and the oil drain groove is correspondingly communicated with the oil drain hole. The pressure oil entering the gap between the bushing and the valve core can more conveniently enter the oil drain hole through the annular oil drain groove for the pressure oil distributed on the circumferential surface of the valve core.

[0012] Preferably, a number of second oil drain channels are also provided on the valve body. The inlets of the second oil drain channels and the inlet of the main oil circuit are on the same side of the valve body, and the outlets of the second oil drain channels and the outlet of the first oil drain channel are on the same side of the valve body. The oil flowing out from the oil drain port on the solenoid valve can conveniently flow back into the oil tank through the second oil drain channels on the valve body.

[0013] Preferably, an oil return groove is provided at the bottom of the valve body, and the outlets of the first oil drain channel and the second oil drain channel are both located in the oil return groove. The oil flowing out from the first oil drain channel and the second oil drain channel is gathered in the oil return groove, and it is convenient for the oil to flow back into the oil tank through the oil return groove.

[0014] Preferably, the oil passage is an annular groove provided along the circumference of the valve core. Since the oil passage is an annular groove, the hydraulic oil in the first through hole can more conveniently enter the corresponding second through hole through the oil passage. The annular oil passage is simple to process.

[0015] Preferably, one end of the plug body located in the mounting hole is provided with a groove through which both the elastic member and the limiting post can pass. The groove provides a larger axial movement space for the limiting post, making the overall structure more compact.

[0016] Preferably, the valve body is further provided with an oil inlet and two oil outlet holes communicating with the oil inlet. The oil outlet holes and the inlet of the main oil passage are located on the same side of the valve body. The two oil outlet holes facilitate the connection with the oil inlet on the solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 is a perspective structural view of the present invention from a top-down perspective;

[0019] Figure 2 is a perspective structural view of the present invention from a bottom-up perspective;

[0020] Figure 3 is the front view of the present invention;

[0021] Figure 4 is Figure 3 a cross-sectional view taken along line b-b in

[0022] Figure 5 This Figure 3 a cross-sectional view taken along line c-c in

[0023] Figure 6 is a structural view of the present invention when the spool is in the first working position, sectioned along Figure 3 line c-c in

[0024] Figure 7 is Figure 3 a cross-sectional view taken along line a-a in

[0025] Figure 8 is the left view of the present invention;

[0026] Figure 9 is Figure 8 a cross-sectional view taken along line d-d in

[0027] Figure 10 is a perspective structural view of the present invention from a top-down perspective (hiding the solenoid valve);

[0028] Figure 11 It is a three-dimensional structural schematic diagram of the valve core in the present utility model;

[0029] Figure 12 It is a three-dimensional structural schematic diagram of the bushing in the upward view angle of the present utility model.

[0030] The reference numerals include: valve body 1, main oil passage 2, mounting hole 3, oil outlet 4, plug body 5, bushing 6, first through hole 7, second through hole 8, valve core 9, oil passage 10, limit post 11, elastic member 12, branch oil passage 13, retaining ring 14, oil drain hole 15, first oil drain passage 16, second oil drain passage 17, oil return groove 18, groove 19, oil inlet 20, oil outlet hole 21, oil drain groove 22, solenoid valve 23. Specific embodiments

[0031] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the following combines the attached Figures 1-12 drawings and specific embodiments to make a preferred and detailed description of the present utility model.

[0032] Please refer to Figures 1-12, A dual-solenoid valve oil circuit protection device provided in this embodiment includes a valve body 1. Two main oil circuits 2 are provided in the valve body 1, and the inlets of the main oil circuits 2 are located on the upper surface of the valve body 1. An installation hole 3 is provided in the valve body 1 and penetrates through the left and right sides of the valve body 1. Two oil outlets 4 corresponding to the two main oil circuits 2 are provided on the front side of the valve body 1. Both ends of the installation hole 3 are blocked by a plug body 5. The outlet of the main oil circuit 2 is communicated with the installation hole 3. The plug body 5 is preferably threadedly connected to the installation hole 3. A bushing 6 is provided in the installation hole 3. Two first through holes 7 corresponding to the outlets of the two main oil circuits 2 and two second through holes 8 corresponding to the two oil outlets 4 are provided on the bushing 6. Both the first through hole 7 and the second through hole 8 are distributed along the axial direction of the bushing 6. A valve core 9 is slidably connected in the bushing 6, and the diameter of the valve core 9 matches the inner diameter of the bushing 6. Two oil channels 10 are provided on the valve core 9. Limit posts 11 are provided at both the left and right ends of the valve core 9. The diameter of the limit post 11 is smaller than the diameter of the valve core 9. Elastic members 12 are provided between both ends of the valve core 9 and the corresponding plug bodies 5. A branch oil circuit 13 corresponding to and communicated with the two main oil circuits 2 is further provided in the valve body 1. The outlet of the branch oil circuit 13 is communicated with the installation hole 3. The outlets of the two branch oil circuits 13 correspond to the two limit posts 11 one by one. During use, the hydraulic oil in the main oil circuit 2 can enter the space enclosed by the corresponding limit post 11, valve core 9, bushing 6, plug body 5, and installation hole 3 through the branch oil circuit 13. The valve core 9 has a first working position, a second working position, and a third working position in sequence from right to left along the axial direction of the bushing 6. When the valve core 9 is in the first working position, the oil channel 10 near the first end of the valve core 9 is communicated with the adjacent first through hole 7 and second through hole 8, that is, the oil channel 10 in the left section of the valve core 9 is communicated with the first through hole 7 and the second through hole 8 in the left section of the bushing 6, thereby forming a passage for the left main oil circuit 2 to lead to the corresponding oil outlet 4. When the valve core 9 is in the second working position, the valve core 9 blocks the passage between the two first through holes 7 and the corresponding second through holes 8. When the valve core 9 is in the third working position, the oil channel 10 near the second end of the valve core 9 is communicated with the adjacent first through hole 7 and second through hole 8, that is, the oil channel 10 in the right section of the valve core 9 is communicated with the first through hole 7 and the second through hole 8 in the right section of the bushing 6, thereby forming a passage for the right main oil circuit 2 to lead to the corresponding oil outlet 4. Among them, the oil channel 10 can be a through hole radially penetrating the valve core 9 or a groove provided on the surface of the valve core 9, as long as the corresponding first through hole 7 and second through hole 8 can be communicated through the oil channel 10 when the valve core 9 is in the corresponding working position. The bushing 6 is specifically arranged in the installation hole 3 in a fixed connection manner. Please refer to Figure 10 , In this embodiment, preferably, the oil channel 10 is an annular groove provided along the circumferential direction of the valve core 9.

[0033] By adopting the above solution, during use, two solenoid valves 23 are installed on the top of the valve body 1. The solenoid valves 23 can specifically be existing power-off solenoid valves 23, and the specific models of the two solenoid valves 23 are 24SEY1-C10BW and 24SEY2-C10BW. The oil outlet ends of the two solenoid valves 23 are communicated with the inlets of the corresponding main oil passages 2. When both of the two solenoid valves 23 are turned on, pressure oil is introduced into both of the two main oil passages 2. The pressure oil enters the space jointly enclosed by the corresponding limit posts 11, mounting holes 3, plug bodies 5 and valve cores 9 through the corresponding main oil passages 2 and branch oil passages 13, and the pressure oil exerts a force on the valve core 9. Since the two forces are equal in magnitude and opposite in direction, the valve core 9 will not move. Under the elastic force of the two elastic members 12, the valve core 9 moves to the second working position. Since the valve core 9 is subjected to the same axial pressure of the pressure oil at both ends, the valve core 9 can remain in the second working position after moving, so that the valve core 9 blocks the passage between the two first through holes 7 and the corresponding second through holes 8, and no pressure oil is output from the two oil outlets 4, thereby achieving the effect of preventing the two clutches from being engaged and disengaged simultaneously.

[0034] Please refer to Figure 5 , a retaining ring 14 is sleeved on the limit post 11, and the retaining ring 14 can slide relative to the limit post 11. When the valve core 9 is in the second working position, both sides of the retaining ring 14 are respectively in contact with the bushing 6 and the corresponding elastic member 12. When the valve core 9 is in the second working position, the elastic member 12 is in contact with the corresponding retaining ring 14, and the retaining ring 14 is in contact with the corresponding bushing 6. The retaining ring 14 and the bushing 6 bear the elastic force of the elastic member 12, which enables the valve core 9 to stably remain in this position after being in the second working position. When the elastic force of one of the elastic members 12 has a certain loss after working for a period of time and the elastic forces of the two elastic members 12 are not equal in magnitude, it is easy to cause the valve core 9 to deviate from the second working position. However, since the retaining ring 14 limits the stroke of the single-sided elastic member 12 to push the valve core 9, it can ensure that the valve core 9 can move to the second working position.

[0035] In this embodiment, the elastic member 12 is preferably a spring, and one end of the spring is sleeved on the limit post 11.

[0036] Please refer to Figure 2 and 12 , in order to facilitate the discharge of oil between the gap between the inside of the bushing 6 and the valve core 9, preferably, an oil drain hole 15 is opened on the bushing 6. The oil drain hole 15 is located between the two first through holes 7 and between the two second through holes 8. The oil drain hole 15 is specifically opened on the lower side of the middle of the bushing 6. A first oil drain passage 16 communicating with the oil drain hole 15 is opened on the valve body 1, and the outlet of the first oil drain passage 16 is opened on the surface of the valve body 1. The outlet of the first oil drain passage 16 is specifically located on the lower surface of the valve body 1.

[0037] Please refer to Figure 5, an oil drain groove 22 is circumferentially formed on the inner side of the bushing 6, and the oil drain groove 22 is correspondingly communicated with the oil drain hole 15.

[0038] Please refer to Figure 2 and Figure 4 , in order to facilitate the oil discharged from the oil drain port of the solenoid valve 23 to flow back into the fuel tank, preferably, a plurality of second oil drain channels 17 are further formed on the valve body 1, and the number and positions of the second oil drain channels 17 are correspondingly set according to the oil drain port of the solenoid valve 23. The inlet of the second oil drain channel 17 and the inlet of the main oil path 2 are located on the same side of the valve body 1, and preferably on the upper side of the valve body 1 in this embodiment. The outlet of the second oil drain channel 17 and the outlet of the first oil drain channel 16 are located on the same side of the valve body 1, and preferably on the lower side of the valve body 1 in this embodiment. An oil return groove 18 is formed at the bottom of the valve body 1, and the outlets of the first oil drain channel 16 and the second oil drain channel 17 are both located in the oil return groove 18.

[0039] Please continue to refer to Figure 5 , in order to make the overall structure more compact, preferably, a groove 19 is formed at one end of the plug body 5 located in the mounting hole 3, through which the corresponding elastic member 12 and the limiting post 11 can pass simultaneously.

[0040] Please refer to Figure 2 and Figure 9 , an oil inlet 20 and two oil outlet holes 21 communicated with the oil inlet 20 are further formed on the valve body 1, and the oil outlet holes and the inlet of the main oil passage 10 are located on the same side surface of the valve body 1. Specifically, the oil inlet 20 is located on the left side of the valve body 1, and the oil outlet holes 21 are located on the upper side of the valve body 1.

[0041] It should be noted that the words indicating directions in this article, such as up and down, etc., are all set in the direction of Figure 1 , only for the convenience of description and have no other specific meanings.

[0042] It should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that an article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the article or device including the above elements.

[0043] In this article, specific examples are used to elaborate on the principle and implementation mode of the present utility model. The description of the above embodiments is only used to help understand the core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A dual solenoid valve oil circuit protection device, characterized in that: The invention comprises a valve body (1), wherein two main oil passages (2) are provided in the valve body (1), the inlets of the main oil passages (2) are located on the surface of the valve body (1), the valve body (1) is provided with a mounting hole (3) penetrating the valve body (1), and two oil outlets (4) corresponding to the two main oil passages (2) in a one-to-one manner, both ends of the mounting hole (3) are blocked by a plug body (5), the outlet of the main oil passage (2) is communicated with the mounting hole (3), a bushing (6) is provided in the mounting hole (3), and the bushing (6) is provided in the mounting hole (3). The sleeve (6) is provided with two first through holes (7) corresponding to the outlets of the two main oil passages (2) one by one, and a second through hole (8) corresponding to the two oil outlets (4) one by one. A valve core (9) is slidably connected in the sleeve (6). The valve core (9) matches the sleeve (6). Two oil passages (10) are provided on the valve core (9). Limiting columns (11) are provided at both ends of the valve core (9). The diameter of the limiting columns (11) is smaller than the diameter of the valve core (9). The valve core (9) An elastic member (12) is provided between the two ends of the valve body (1) and the corresponding plug body (5); a branch oil path (13) is provided in the valve body (1) and is connected to the two main oil paths (2) in a one-to-one correspondence; the outlet of the branch oil path (13) is connected to the mounting hole (3); the outlets of the two branch oil paths (13) are in a one-to-one correspondence with the two limit posts (11); the valve core (9) has a first working position, a second working position and a third working position which are sequentially distributed along the axial direction of the bushing (6); when the valve core (9) When the valve core (9) is in the first working position, the oil passage (10) near the first end of the valve core (9) is in communication with both the adjacent first through hole (7) and the second through hole (8); when the valve core (9) is in the second working position, the valve core (9) blocks the passages between the two first through holes (7) and the corresponding second through holes (8); when the valve core (9) is in the third working position, the oil passage (10) near the second end of the valve core (9) is in communication with both the adjacent first through hole (7) and the second through hole (8).

2. A dual solenoid valve oil circuit protection device as claimed in claim 1, characterized in that: A retaining ring (14) is sleeved on the limiting column (11), and the retaining ring (14) can slide relative to the limiting column (11). When the valve core (9) is located at the second working position, two sides of the retaining ring (14) respectively abut against the bushing (6) and the corresponding elastic member (12).

3. A dual solenoid valve oil circuit protection device as claimed in claim 1 or 2, characterized in that: The elastic member (12) is a spring, and a section of the spring is sleeved on the limiting column (11).

4. A dual solenoid valve oil circuit protection device as claimed in claim 3, characterized in that: The bushing (6) is provided with an oil drain hole (15), the oil drain hole (15) is located between the two first through holes (7) and between the two second through holes (8), the valve body (1) is provided with a first oil drain channel (16) connected to the oil drain hole (15), and the outlet of the first oil drain channel (16) is provided on the surface of the valve body (1).

5. A dual solenoid valve oil circuit protection device as claimed in claim 4, characterized in that: An oil drain groove (22) is provided on the inner side of the bushing (6) along the circumferential direction, and the oil drain groove (22) is correspondingly connected to the oil drain hole (15).

6. A dual solenoid valve oil circuit protection device as claimed in claim 5, characterized in that: The valve body (1) is also provided with a plurality of second oil drain channels (17); the inlet of the second oil drain channel (17) and the inlet of the main oil circuit (2) are located on the same side of the valve body (1); and the outlet of the second oil drain channel (17) and the outlet of the first oil drain channel (16) are located on the same side of the valve body (1).

7. A dual solenoid valve oil circuit protection device as described in any one of claims 4 to 6, characterized in that: An oil return groove (18) is provided at the bottom of the valve body (1), and the outlets of the first oil drain channel (16) and the second oil drain channel (17) are both located in the oil return groove (18).

8. A dual solenoid valve oil circuit protection device as claimed in claim 1, characterized in that: The oil passage (10) is an annular groove opened along the circumference of the valve core (9).

9. A dual solenoid valve oil circuit protection device as claimed in claim 1, characterized in that: One end of the plug body (5) located in the mounting hole (3) is provided with a groove (19) through which the elastic member (12) and the limiting column (11) can pass simultaneously.

10. A dual solenoid valve oil circuit protection device as claimed in claim 1, characterized in that: The valve body (1) is also provided with an oil inlet (20) and two oil outlet holes (21) connected to the oil inlet (20); the oil outlet holes (21) and the entrance of the main oil channel (10) are located on the same side of the valve body (1).

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