Brake oil supply valve

Abstract

The utility model relates to a brake oil supply valve which comprises an outer shell, a first inner shell, a second inner shell, a first piston and a second piston, an oil cup is arranged on the outer wall of the outer shell, a first conversion cavity is formed in the outer wall of the first inner shell, and the first conversion cavity is communicated with the oil cup through a first oil hole; the first piston is arranged in the second inner shell; the second piston is arranged in the first inner shell, a second conversion cavity is formed between the first piston and the second piston, and the second conversion cavity communicates with the first conversion cavity; a sealing cavity is formed in the first inner shell, a third conversion cavity is formed in the second piston, one end of the third conversion cavity communicates with the second conversion cavity through a one-way oil inlet structure, and the other end of the third conversion cavity communicates with the sealing cavity. The second piston is arranged in the first inner shell, in the moving range of the second piston, the inner wall of the first inner shell is smooth and continuous, the second piston does not pass through the oil hole, friction force borne by a sealing piece on the outer wall of the second piston is stable and even, and the service life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of integrated valves, in particular to a brake oil supply valve. Background Art

[0002] Traditional brake oil supply valve mechanism such as Figure 1 As shown, a piston 110 and an oil storage chamber 130 are provided in the housing 140, and an oil inlet 100 and an oil outlet 120 are provided at both ends of the oil storage chamber 130, respectively. When braking, the piston rod pushes the piston 110 to move toward the oil outlet 120, so that the piston 110 closes the oil inlet 100, and at the same time pushes the oil in the oil storage chamber 130 into the brake system for braking. After the braking is completed, the piston 110 is reset, and the oil inlet 100 is connected to the oil storage chamber 130 again. Since the piston 110 and the seal on the outer wall of the piston 110 constantly pass through the connection between the oil inlet 100 and the oil storage chamber 130, there is a large friction between the connection and the seal, and the frequent friction causes the seal to wear quickly and has a short service life. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a brake oil supply valve which can slow down the wear of the sealing element.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is: a brake oil supply valve, including an outer shell, a first inner shell, a second inner shell, a first piston and a second piston, the outer wall of the outer shell is provided with an oil cup, the first inner shell and the second inner shell are arranged inside the outer shell, and the outer wall of the first inner shell is provided with a first conversion chamber, and the first conversion chamber is connected with the oil cup through a first oil hole; the first piston is arranged in the second inner shell and slides with the second inner shell, and the first piston is connected with a driving mechanism; the second piston is arranged in the first inner shell and slides with the first inner shell, a second conversion chamber is provided between the first piston and the second piston, and the second conversion chamber is connected with the first conversion chamber through a connecting channel; a sealing chamber is provided in the first inner shell, and a third conversion chamber is provided in the second piston, one end of the third conversion chamber is connected with the second conversion chamber through a one-way oil inlet structure, and the other end is connected with the sealing chamber, and an oil drain hole is provided at the end of the sealing chamber away from the second piston.

[0005] Furthermore, the driving mechanism comprises a motor and a piston rod, and the piston rod is fixedly connected to the first piston.

[0006] Further, the one-way oil inlet structure includes a plug, which includes a first cylindrical section, a truncated cone section, a second cylindrical section and a third cylindrical section arranged in sequence from the second conversion chamber to the third conversion chamber, the diameters of the first cylindrical section and the third cylindrical section are smaller than the diameter of the second cylindrical section, and the outer wall of the second cylindrical section is provided with a flow channel axially penetrating the second cylindrical section; the second piston is provided with a through hole axially penetrating the second piston, and the through hole includes a first straight hole section, a tapered hole section, a second straight hole section, a third conversion chamber and a third straight hole section connected in sequence from the second conversion chamber to the sealing chamber, the first cylindrical section is slidably matched with the first straight hole section, the outer wall of the truncated cone section is fitted with the inner wall of the tapered hole section, the second cylindrical section is slidably matched with the second straight hole section, the third cylindrical section extends into the third conversion chamber, a support sleeve is provided in the third straight hole section, the inner diameter of the support sleeve is adapted to the outer diameter of the third cylindrical section, and a first spring is provided between the support sleeve and the second cylindrical section.

[0007] Furthermore, a second spring is arranged between the first piston and the second piston.

[0008] Furthermore, a push rod is provided at one end of the first piston facing the second piston.

[0009] Further, the connecting channel is arranged on the outer wall of one end of the second piston facing the first piston, and the connecting channel is connected with the second conversion chamber through the second oil hole, and is connected with the first conversion chamber 7 through the third oil hole 23 .

[0010] Furthermore, sealing rings are provided on the outer walls of the first inner shell on both sides of the first conversion chamber.

[0011] The beneficial effects of the utility model are as follows: the utility model arranges the first inner shell in the outer shell, and the second piston is arranged in the first inner shell. Within the moving range of the second piston, the inner wall of the first inner shell is smooth and continuous, the second piston will not pass through the oil hole, the friction force on the seal of the outer wall of the second piston is stable and uniform, and the service life is extended. When braking, the driving mechanism pushes the first piston to move in the direction of the second piston. When the first piston reaches the one-way oil inlet structure, the one-way oil inlet structure opens, and the oil in the oil cup enters the first conversion chamber through the first oil hole, and then enters the second conversion chamber through the connecting channel, and then enters the third conversion chamber through the one-way oil inlet structure, and finally enters the sealing chamber to supply oil to the sealing chamber. As the first piston continues to run, the one-way oil inlet structure closes, and the first piston pushes the second piston to move, providing braking power. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the prior art;

[0013] Figure 2 It is a schematic diagram of the main cross-sectional view of the utility model;

[0014] Figure 3 It is a schematic diagram of the plug;

[0015] Figure 4 is a schematic diagram of the second piston. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] The brake oil supply valve of the utility model is as follows Figure 2 , Figure 3 and Figure 4 As shown, it includes an outer shell 1, a first inner shell 2, a second inner shell 3, a first piston 4 and a second piston 5. The outer wall of the outer shell 1 is provided with an oil cup 6, the first inner shell 2 and the second inner shell 3 are arranged inside the outer shell 1, and the outer wall of the first inner shell 2 is provided with a first conversion chamber 7, and the first conversion chamber 7 is communicated with the oil cup 6 through a first oil hole 8; the first piston 4 is arranged in the second inner shell 3 and slides with the second inner shell 3, and the first piston 4 is connected to a driving mechanism; the second piston 5 is arranged in the first inner shell 2 and slides with the first inner shell 2, a second conversion chamber 9 is arranged between the first piston 4 and the second piston 5, and the second conversion chamber 9 is communicated with the first conversion chamber 7 through a connecting channel 10; a sealing chamber 12 is arranged in the first inner shell 2, and a third conversion chamber 11 is arranged in the second piston 5, one end of the third conversion chamber 11 is communicated with the second conversion chamber 9 through a one-way oil inlet structure, and the other end is communicated with the sealing chamber 12, and an oil discharge hole 13 is arranged at the end of the sealing chamber 12 away from the second piston 5.

[0018] The first inner shell 2 and the second inner shell 3 are both fixedly installed in the outer shell 1. The oil cup 6 is used to store oil and is fixed on the outer wall of the outer shell 1. The outer wall of the first inner shell 2 is provided with an annular groove, which serves as the first conversion chamber 7. The first oil holes 8 are provided on the outer shell 1 in the oil cup 6, and the number can be two, three, four, etc., so that the oil in the oil cup 6 can enter the first conversion chamber 7 through the first oil holes 8.

[0019] The driving mechanism is used to drive the first piston 4 to move axially. Specifically, the driving mechanism includes a motor 14 and a piston rod 15, and the piston rod 15 is fixedly connected to the first piston 4. The motor 14 can be a linear motor, etc., which is fixedly installed at the end of the outer shell 1 and drives the first piston 4 to move through the piston rod 15. The outer wall of the first piston 4 is provided with a seal, and the seal can be made of existing technology.

[0020] The outer wall of the second piston 5 is also provided with a seal to ensure the sealing between the second piston 5 and the first inner shell 2. There is a certain distance between the first piston 4 and the second piston 5, and the distance serves as the second conversion chamber 9. The one-way oil inlet structure can realize that the oil in the second conversion chamber 9 enters the third conversion chamber 11, while the oil in the third conversion chamber 11 cannot enter the second conversion chamber 9. The one-way oil inlet structure can be closed and opened, and its closing and opening are realized by the movement of the first piston 4. Specifically, the one-way oil inlet structure includes a plug 16, and the plug 16 includes a first cylindrical section 161, a truncated cone section 162, a second cylindrical section 163 and a third cylindrical section 164 which are arranged in sequence from the second conversion chamber 9 to the third conversion chamber 11. The diameters of the first cylindrical section 161 and the third cylindrical section 164 are smaller than the diameter of the second cylindrical section 163. The outer wall of the second cylindrical section 163 is provided with a flow channel 165 which axially penetrates the second cylindrical section 163; the second piston 5 is provided with a through hole which axially penetrates the second piston 5, and the through hole includes The first straight hole section 51, the tapered hole section 52, the second straight hole section 53, the third conversion chamber 11 and the third straight hole section 54 are connected in sequence from the second conversion chamber 9 to the sealing chamber 12. The first cylindrical section 161 is slidably matched with the first straight hole section 51, the outer wall of the frustum section 162 is fitted with the inner wall of the tapered hole section 52, the second cylindrical section 163 is slidably matched with the second straight hole section 53, the third cylindrical section 164 extends into the third conversion chamber 11, and a support sleeve 55 is arranged in the third straight hole section 54. The inner diameter of the support sleeve 55 is adapted to the outer diameter of the third cylindrical section 164, and a first spring 17 is arranged between the support sleeve 55 and the second cylindrical section 163.

[0021] The first cylindrical section 161, the truncated cone section 162, the second cylindrical section 163 and the third cylindrical section 164 can be formed in one piece or separately and then assembled into one piece by screw connection, welding connection and the like. The support sleeve 55 can be threadedly connected to the second piston 5 to play a positioning role, and the third conversion chamber 11 is connected to the sealing chamber 12 through the inner hole of the support sleeve 55. The first spring 17 is in a compressed state and has a certain elastic force. Under the action of this elastic force, the outer wall of the truncated cone section 162 can fit tightly against the inner wall of the tapered hole section 52, thereby closing the one-way oil inlet structure, and the oil cannot pass through the one-way oil inlet structure. The third cylindrical section 164 can extend into the inner hole of the support sleeve 55 and close the support sleeve 55. After the support sleeve 55 is closed, the passage between the third conversion chamber 11 and the sealing chamber 12 is closed, and the oil in the third conversion chamber 11 cannot enter the sealing chamber 12.

[0022] The working process of the utility model is as follows: the oil in the oil cup 6 enters the first conversion chamber 7 through the first oil hole 8, and the oil in the first conversion chamber 7 enters the second conversion chamber 9 through the connecting channel 10. Under normal conditions, the outer wall of the truncated cone section 162 fits the inner wall of the tapered hole section 52, the one-way oil inlet structure is closed, the third cylindrical section 164 does not enter the support sleeve 55, and the third conversion chamber 11 is connected with the sealing chamber 12. When braking, the driving mechanism drives the first piston 4 to move toward the direction of the second piston 5, exerts pressure on the oil in the second conversion chamber 9, and the oil pushes the plug 16 to move axially, and the first spring 17 is further compressed, and at the same time, a gap is formed between the outer wall of the truncated cone section 162 and the inner wall of the tapered hole section 52, and the oil in the second conversion chamber 9 can reach the second cylindrical section 163 through the gap, and then flow along the flow channel 165 of the outer wall of the second cylindrical section 163 to the third conversion chamber 11, and the oil in the third conversion chamber 11 enters the sealing chamber 12 through the inner hole of the support sleeve 55, so as to replenish the oil in the sealing chamber 12. As the first piston 4 continues to move, the plug 16 moves as a whole toward the sealed chamber 12. When the third cylindrical section 164 of the plug 16 extends into the support sleeve 55, the inner hole of the support sleeve 55 is closed, and the oil in the third conversion chamber 11 can no longer enter the sealed chamber 12. At this time, the first piston 4 pushes the second piston 5 to move as a whole toward the sealed chamber 12, applying pressure to the oil in the sealed chamber 12. The oil in the sealed chamber 12 reaches the brake system through the oil drain hole 13 to provide braking power. After the brake is completed, the drive mechanism drives the first piston 4 to reset, and the first spring 17 pushes the plug 16 to reset.

[0023] A push rod 19 is disposed at one end of the first piston 4 facing the second piston 5 . The diameter of the push rod 19 is less than or equal to the diameter of the first cylindrical section 161 . The push rod 19 can assist in pushing the first cylindrical section 161 to move axially.

[0024] A second spring 18 is provided between the first piston 4 and the second piston 5 , and the second spring 18 plays a role of buffering and shock absorption.

[0025] In the present invention, the connecting channel 10 is arranged on the outer wall of the second piston 5 at one end facing the first piston 4 , and the connecting channel 10 is connected with the second conversion chamber 9 through the second oil hole 21 , and is connected with the first conversion chamber 7 through the third oil hole 23 .

[0026] In order to prevent oil from leaking from the fitting gap between the outer housing 1 and the first inner housing 2 , sealing rings 22 are provided on the outer wall of the first inner housing 2 on both sides of the first conversion cavity 7 .

[0027] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. Brake oil supply valve, characterized by: The invention comprises an outer shell (1), a first inner shell (2), a second inner shell (3), a first piston (4) and a second piston (5); the outer wall of the outer shell (1) is provided with an oil cup (6); the first inner shell (2) and the second inner shell (3) are arranged inside the outer shell (1); the outer wall of the first inner shell (2) is provided with a first conversion chamber (7); the first conversion chamber (7) is communicated with the oil cup (6) through a first oil hole (8); the first piston (4) is arranged in the second inner shell (3) and is slidably matched with the second inner shell (3); the first piston (4) is connected to a driving mechanism; the second piston (5) is arranged in the second inner shell (3); A second conversion chamber (9) is provided in an inner housing (2) and slidably cooperates with the first inner housing (2); the first piston (4) and the second piston (5) are connected to the first conversion chamber (7) through a connecting passage (10); a sealing chamber (12) is provided in the first inner housing (2); a third conversion chamber (11) is provided in the second piston (5); one end of the third conversion chamber (11) is connected to the second conversion chamber (9) through a one-way oil inlet structure, and the other end is connected to the sealing chamber (12); an oil discharge hole (13) is provided at one end of the sealing chamber (12) away from the second piston (5).

2. The brake oil supply valve according to claim 1, characterized in that: The driving mechanism comprises a motor (14) and a piston rod (15), and the piston rod (15) is fixedly connected to the first piston (4).

3. The brake oil supply valve according to claim 1, characterized in that: The one-way oil inlet structure comprises a plug (16), the plug (16) comprising a first cylindrical section (161), a truncated cone section (162), a second cylindrical section (163) and a third cylindrical section (164) which are arranged in sequence from the second conversion chamber (9) to the third conversion chamber (11), the diameters of the first cylindrical section (161) and the third cylindrical section (164) being smaller than the diameter of the second cylindrical section (163), and the outer wall of the second cylindrical section (163) is provided with a flow channel (165) which axially penetrates the second cylindrical section (163); the second piston (5) is provided with a through hole which axially penetrates the second piston (5), and the through hole comprises a first straight section (165) which is connected in sequence from the second conversion chamber (9) to the sealing chamber (12). The invention relates to a hole section (51), a tapered hole section (52), a second straight hole section (53), a third conversion cavity (11) and a third straight hole section (54); the first cylindrical section (161) is slidably matched with the first straight hole section (51); the outer wall of the truncated cone section (162) is in contact with the inner wall of the tapered hole section (52); the second cylindrical section (163) is slidably matched with the second straight hole section (53); the third cylindrical section (164) extends into the third conversion cavity (11); a support sleeve (55) is arranged in the third straight hole section (54); the inner diameter of the support sleeve (55) is matched with the outer diameter of the third cylindrical section (164); and a first spring (17) is arranged between the support sleeve (55) and the second cylindrical section (163).

4. The brake oil supply valve according to claim 3, characterized in that: A second spring (18) is arranged between the first piston (4) and the second piston (5).

5. The brake oil supply valve according to claim 3, characterized in that: A push rod (19) is provided at one end of the first piston (4) facing the second piston (5).

6. The brake oil supply valve according to claim 1, characterized in that: The connecting channel (10) is arranged on the outer wall of one end of the second piston (5) facing the first piston (4), and the connecting channel (10) is connected to the second conversion chamber (9) through the second oil hole (21), and is connected to the first conversion chamber (7) through the third oil hole (23).

7. The brake oil supply valve according to claim 1, characterized in that: Sealing rings (22) are provided on the outer walls of the first inner shell (2) on both sides of the first conversion chamber (7).

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