Assistor with stable liquid level

Abstract

The utility model belongs to the field of assistor structures, and particularly discloses a liquid level stabilizing assistor which comprises a driving assembly, an oil storage assembly and a power assembly, and the power assembly comprises an oil cavity and an oil outlet hole formed in the oil cavity. The oil storage assembly comprises an oil storage cup used for feeding brake oil into the oil cavity. The driving assembly comprises an oil cylinder piston and a first driving piece used for driving the oil cylinder piston to slide, a sealing piece is arranged at the end of the oil cylinder piston and used for sealing the space in the circumferential direction of the oil cylinder piston and the space in the side wall of the oil cavity, and the sealing piece passes through the first communicating hole in the process that the oil cylinder piston slides relative to the oil cavity. An annular groove used for being communicated with the oil storage cup is formed in the oil cylinder piston, and a plurality of oil passing holes used for being communicated with the annular groove and the sealing piece are further formed in the oil cylinder piston. By the adoption of the scheme, the problems that when a gap exists between the piston and the inner wall of the oil cavity, the pushing effect on brake oil in the oil cavity is reduced, and oil feeding is slow or oil supplementing is insufficient can be solved.

Description

Technical Field

[0001] The utility model belongs to the field of booster structures, and in particular relates to a liquid level stabilizing booster. Background Art

[0002] The booster pump (also called booster) is one of the important components in the brake system of construction machinery. It is a product that converts air kinetic energy into hydraulic kinetic energy and outputs it with multiple force. During the use of construction machinery, the booster pump output system may have slow oil delivery or insufficient oil replenishment, causing brake fatigue failure of the brake system, which will affect the working performance or functional failure of the booster pump. Specifically, the working principle of the booster pump is: hydraulic kinetic energy is generated by the piston pushing the brake oil in the oil chamber to output, and when there is a gap between the piston and the inner wall of the oil chamber, the pushing effect on the brake oil in the oil chamber will be reduced, resulting in slow oil delivery or insufficient oil replenishment. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a liquid level stabilizing booster to solve the problem that when there is a gap between the piston and the inner wall of the oil chamber, the pushing effect on the brake oil in the oil chamber will be reduced, resulting in slow oil delivery or insufficient oil replenishment.

[0004] According to the embodiment of the utility model, the utility model adopts the following technical solution:

[0005] A liquid level stabilizing booster comprises a driving assembly, an oil storage assembly and a power assembly, the power assembly comprising an oil chamber and an oil outlet hole provided on the oil chamber; the oil storage assembly comprises an oil storage cup for introducing brake oil into the oil chamber, the oil storage cup is provided with a first connecting hole connected to the oil chamber; the driving assembly comprises a cylinder piston and a first driving member for driving the cylinder piston to slide, the end of the cylinder piston extends into the oil chamber, a sealing member is provided at the end of the cylinder piston, the sealing member is used to seal the space between the cylinder piston and the side wall of the oil chamber, and the sealing member passes through the first connecting hole during the sliding process of the cylinder piston relative to the oil chamber; an annular groove for connecting to the oil storage cup is provided on the cylinder piston, and a plurality of oil holes for connecting the annular groove and the sealing member are also provided on the cylinder piston.

[0006] Compared with the prior art, the utility model has the following beneficial effects:

[0007] In this solution, a seal is installed at the end of the cylinder piston to seal the gap between the cylinder piston and the inner wall of the oil chamber. When the cylinder piston drives the seal to move and pushes the brake oil in the oil chamber to move, in order to avoid the oil pressure of the brake oil squeezing the seal and causing seal failure, the annular groove and the oil storage cup are connected, and the brake oil can be filled into the annular groove. Through the oil hole, the brake oil generates oil pressure on the seal, that is, the seal is subjected to oil pressure on both sides, thereby ensuring the balance of force on the seal and further ensuring the sealing effect.

[0008] Furthermore, the first driving member includes an air cavity and a cylinder piston slidably connected in the air cavity, the cylinder piston is connected to the oil cylinder piston, and a return spring is installed between the cylinder piston and / or the oil cylinder piston and the inner wall of the air cavity.

[0009] Furthermore, a detection component for detecting the position of the cylinder piston is installed in the air cavity, and a second driving component for passing the brake oil into the annular groove is installed in the oil storage cup.

[0010] Furthermore, the detection member includes a displacement sensor installed in the air cavity.

[0011] Furthermore, the second driving member includes a slide plate slidably connected in the oil storage cup, and the slide plate is used to press the brake oil in the oil storage cup into the annular groove.

[0012] Furthermore, it also includes a controller, wherein a signal receiving end of the controller is used to receive a detection signal from the detection member, and a signal output end of the controller is used to control the opening and closing of the second driving member.

[0013] Furthermore, the air cavity and the oil cavity are separated by an isolating seat, the oil cylinder piston is slidably connected to the isolating seat, and a plurality of sealing rings are installed between the oil cylinder piston and the isolating seat along the axial direction thereof.

[0014] Furthermore, a limiting ring for clamping on the isolation seat is provided on the side wall of the oil cylinder piston.

[0015] Furthermore, the sealing element comprises a leather cup sealing ring installed at the end of the oil cylinder piston, and the end of the oil cylinder piston is provided with a groove for installing the leather cup sealing ring.

[0016] Furthermore, an oil inlet gap is provided between the side of the oil cylinder piston located at the annular groove facing away from the seal and the inner wall of the oil chamber, and the oil inlet gap is communicated with the annular groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model.

[0018] Figure 2 for Figure 1 Enlarged view of part A.

[0019] Figure 3 It is a schematic diagram of the overall structure of another implementation method of the utility model.

[0020] In the figure: 1. air cavity; 2. air inlet; 3. air outlet; 4. cylinder piston; 5. oil cylinder piston; 6. sealing ring; 7. isolation seat; 8. return spring; 9. oil cavity; 10. oil outlet; 11. sealing element; 12. annular groove; 13. limiting ring; 14. oil storage cup; 15. first connecting hole; 16. second connecting hole; 17. oil hole; 18. oil inlet gap; 19. slide plate; 20. mounting plate; 21. displacement sensor. DETAILED DESCRIPTION

[0021] The utility model is further described in detail below with reference to the accompanying drawings, and specific implementation methods are given.

[0022] like Figure 1 , Figure 2 As shown, the liquid level stabilizing booster includes a driving component, an oil storage component and a power component. The power component includes an oil chamber 9 and an oil outlet 10 opened on the oil chamber 9. When the device is applied to a braking system, the brake oil in the oil chamber 9 is discharged through the oil outlet 10 and can enter the oil cylinder of the caliper disc brake to implement braking. This is the conventional principle of the prior art and will not be elaborated in this embodiment.

[0023] The oil storage assembly includes an oil storage cup 14 for introducing brake oil into the oil chamber 9, and a first communication hole 15 communicating with the oil chamber 9 is formed on the oil storage cup 14. The driving assembly includes a cylinder piston 5 and a first driving member for driving the cylinder piston 5 to slide. The end of the cylinder piston 5 extends into the oil chamber 9, and the cylinder piston 5 is slidably connected in the oil chamber 9. The cylinder piston 5 slides to apply brake oil pressure in the oil chamber 9, and the brake oil is pushed to be discharged through the oil outlet 10.

[0024] The first driving member includes an air cavity 1 and a cylinder piston 4 slidably connected in the air cavity 1, and an air inlet hole 2 and an air outlet hole 3 are provided on the air cavity 1. The cylinder piston 4 is connected to the oil cylinder piston 5. In the actual design process, the cylinder piston 4 and the oil cylinder piston 5 can be connected by a fixed connection, or by a conventional detachable connection (such as a bolt connection) or other connection methods in the prior art, as long as the oil cylinder piston 5 can be driven to slide synchronously when the cylinder piston 4 slides. In the prior art, the braking system allows the compressed gas to enter the air cavity 1 through the air inlet hole 2 on the air cavity 1 and push the cylinder piston 4 to slide by stepping on the brake pedal. This is the conventional principle of the prior art and will not be elaborated in this embodiment. Of course, other methods can also be used to push the cylinder piston 4 to slide, such as directly introducing compressed gas into the air cavity 1. A return spring 8 is installed between the cylinder piston 4 and / or the oil cylinder piston 5 and the inner wall of the air cavity 1. Through the setting of the return spring 8, the cylinder piston 4 can automatically return. During the return process of the cylinder piston 4, the compressed gas in the air cavity 1 is discharged through the outlet hole 3.

[0025] The air chamber 1 and the oil chamber 9 are separated by the isolation seat 7, and the oil cylinder piston 5 is slidably connected to the isolation seat 7. A plurality of sealing rings 6 are installed between the oil cylinder piston 5 and the isolation seat 7 along their axial direction. The design of the sealing ring 6 prevents the brake oil in the oil chamber 9 from entering the air chamber 1. The side wall of the oil cylinder piston 5 is provided with a limit ring 13 for clamping on the isolation seat 7. The setting of the limit ring 13 can limit the maximum travel of the oil cylinder piston 5 sliding toward the air chamber 1.

[0026] A seal 11 is provided at the end of the cylinder piston 5. The seal 11 is used to seal the space around the cylinder piston 5 and the side wall of the oil chamber 9. When the cylinder piston 5 slides relative to the oil chamber 9, the seal 11 passes through the first connecting hole 15. Specifically, the seal 11 includes a leather cup seal installed at the end of the cylinder piston 5. The end of the cylinder piston 5 is provided with a groove for installing the leather cup seal. After the leather cup seal is placed in the groove, the end of the cylinder piston 5 is bolted to a mounting plate 20. The cross-section of the mounting plate 20 is L-shaped. One end of the mounting plate 20 is clamped on the end of the cylinder piston 5 by bolts, and the other end of the mounting plate 20 is against the leather cup seal. Figure 2 Taking the direction shown in as an example, in the initial state, the sealing member 11 is located on the left side of the first connecting hole 15. At this time, the first connecting hole 15 is connected to the oil chamber 9, and the brake oil in the oil storage cup 14 can enter the oil chamber 9. As the cylinder piston 5 slides to the right, the sealing member 11 passes through the first connecting hole 15 and is located on the right side of the first connecting hole 15. At this time, the first connecting hole 15 is no longer connected to the oil chamber 9, and the brake oil in the oil chamber 9 is discharged from the oil outlet hole 10 under the pressure of the cylinder piston 5.

[0027] The oil cylinder piston 5 is provided with an annular groove 12 for communicating with the oil storage cup 14. Specifically, the oil storage cup 14 is provided with a second communication hole 16, which is communicated with the annular groove 12. The annular groove 12 is arranged on the side of the seal 11 close to the air cavity 1. The oil cylinder piston 5 is also provided with a plurality of oil holes 17 for communicating with the annular groove 12 and the seal 11. By designing a plurality of oil holes 17, the purpose of transmitting the oil pressure to the seal 11 is achieved, and the problem of the annular groove 12 directly opening to the seal 11, which causes the oil cylinder piston 5 to weaken its supporting effect on the seal 11, is avoided.

[0028] An oil inlet slit 18 is provided between the side of the annular groove 12 of the oil cylinder piston 5 facing away from the seal 11 and the inner wall of the oil chamber 9, and the oil inlet slit 18 is connected to the annular groove 12. By designing the oil inlet slit 18, the side wall of the oil cylinder piston 5 and the inner wall of the oil chamber 9 do not contact each other. During the sliding process of the oil cylinder piston 5, the spatial volume of the oil inlet slit 18 increases or decreases. When the spatial volume of the oil inlet slit 18 increases, it is in a negative pressure state, and the brake oil in the oil storage cup 14 can be automatically drawn into the annular groove 12 and the oil inlet slit 18 through the second connecting hole 16.

[0029] During specific use, when braking is needed, compressed gas is introduced into the air chamber 1, the compressed gas pushes the cylinder piston 4 to slide, and the cylinder piston 4 drives the oil cylinder piston 5 to slide. When the seal 11 passes through the first connecting hole 15, the brake oil in the oil storage cup 14 can no longer enter the oil chamber 9, and the brake oil in the oil chamber 9 cannot enter the oil storage cup 14. The brake oil in the oil chamber 9 is pushed by the oil cylinder piston 5 to generate pressure, and is discharged through the oil outlet 10 for braking.

[0030] During the above process, the spatial volume of the oil inlet slit 18 increases and is in a negative pressure state. The brake oil in the oil storage cup 14 enters the annular groove 12 and the oil inlet slit 18 through the second connecting hole 16, and the brake oil generates oil pressure on the seal 11 through the oil hole 17, that is, the seal 11 is subjected to oil pressure on both sides, thereby ensuring the balance of the force on the seal 11 and further ensuring the sealing effect.

[0031] After braking is completed, the cylinder piston 4 and the oil cylinder piston 5 return quickly under the action of the return spring 8, and the brake oil in the oil inlet gap 18 returns to the oil storage cup 14, and the oil storage cup 14 and the oil chamber 9 are re-connected through the first connecting hole 15. If the brake oil discharged into the caliper disc brake cylinder through the oil outlet hole 10 cannot return to the oil chamber 9 through the oil outlet hole 10 in time due to its own viscosity, the brake oil in the oil storage cup 14 can also be replenished to the oil chamber 9 through the first connecting hole 15 in time.

[0032] In another embodiment of the present invention, in order to avoid insufficient oil pressure on the seal 11 caused by the brake oil entering the annular groove 12 and the oil inlet slit 18 only through the negative pressure of the oil inlet slit 18, in this embodiment, Figure 3 As shown, a detection component for detecting the position of the cylinder piston 4 is installed in the air cavity 1. Specifically, the detection component includes a displacement sensor 21 installed in the air cavity 1. The displacement sensor 21 is a sensor that can be used to detect displacement in the existing technology.

[0033] The oil storage cup 14 is provided with a second driving member for passing the brake oil into the annular groove 12. Specifically, the second driving member includes a slide plate 19 slidably connected to the oil storage cup 14. The slide plate 19 is used to press the brake oil in the oil storage cup 14 into the annular groove 12. In the actual design process, a cylinder can be designed to drive the slide plate 19 to slide. The cylinder is designed above the slide plate 19, but the output shaft of the cylinder and the slide plate 19 are not connected. The output shaft of the cylinder and the slide plate 19 are only offset against each other. When it is necessary to push the slide plate 19 to slide downward, the cylinder can push the slide plate 19 to slide downward for a certain distance and then reset it. The slide plate 19 relies on the subsequent oil pressure to slide upward and reset itself. Such a design can avoid the situation where the design of the cylinder limits the position of the slide plate 19, so that the brake oil in the oil storage cup 14 is not convenient to enter the oil chamber 9. The sliding of the cylinder piston 4 or the oil cylinder piston 5 is detected by the displacement sensor 21. When the sliding distance of the oil cylinder piston 5 can pass through the first connecting hole 15, the brake oil in the oil storage cup 14 can be pressurized, that is, the brake oil is pressurized by sliding down the slide plate 19, so as to quickly pass the brake oil into the annular groove 12 and the oil inlet gap 18.

[0034] In this embodiment, a controller is also included. The signal receiving end of the controller is used to receive the detection signal of the detection member, and the signal output end of the controller is used to control the opening and closing of the second driving member. Specifically, the controller receives the displacement signal of the displacement sensor 21. When the sliding distance of the cylinder piston 5 can pass through the first connecting hole 15, the controller controls the slide plate 19 to slide downward to press the brake oil in the oil storage cup 14 into the annular groove 12.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. Liquid level stabilizing booster, characterized by: It includes a driving component, an oil storage component and a power component. The power component includes an oil chamber and an oil outlet hole provided on the oil chamber. The oil storage component includes an oil storage cup for introducing brake oil into the oil chamber. The oil storage cup is provided with a first connecting hole connected to the oil chamber. The driving component includes a cylinder piston and a first driving component for driving the cylinder piston to slide. The end of the cylinder piston extends into the oil chamber. A sealing component is provided at the end of the cylinder piston. The sealing component is used to seal the space between the cylinder piston and the side wall of the oil chamber. During the sliding process of the cylinder piston relative to the oil chamber, the sealing component passes through the first connecting hole. An annular groove for connecting with the oil storage cup is provided on the cylinder piston. A plurality of oil holes for connecting the annular groove and the sealing component are also provided on the cylinder piston.

2. The liquid level stabilizing booster according to claim 1, characterized in that: The first driving member includes an air cavity and a cylinder piston slidably connected in the air cavity, the cylinder piston is connected to the oil cylinder piston, and a return spring is installed between the cylinder piston and / or the oil cylinder piston and the inner wall of the air cavity.

3. The liquid level stabilizing booster according to claim 2, characterized in that: A detection component for detecting the position of the cylinder piston is installed in the air cavity, and a second driving component for passing the brake oil into the annular groove is installed in the oil storage cup.

4. The liquid level stabilizing booster according to claim 3, characterized in that: The detection member includes a displacement sensor installed in the air cavity.

5. The liquid level stabilizing booster according to claim 3, characterized in that: The second driving member comprises a slide plate slidably connected in the oil storage cup, and the slide plate is used for pressing the brake oil in the oil storage cup into the annular groove.

6. The liquid level stabilizing booster according to claim 3, characterized in that: It also includes a controller, a signal receiving end of the controller is used to receive a detection signal from the detection member, and a signal output end of the controller is used to control the opening and closing of the second driving member.

7. The liquid level stabilizing booster according to claim 2, characterized in that: The air cavity and the oil cavity are separated by an isolating seat, the oil cylinder piston is slidably connected to the isolating seat, and a plurality of sealing rings are installed between the oil cylinder piston and the isolating seat along the axial direction thereof.

8. The liquid level stabilizing booster according to claim 7, characterized in that: The side wall of the oil cylinder piston is provided with a limiting ring for clamping on the isolation seat.

9. The liquid level stabilizing booster according to claim 1, characterized in that: The sealing element comprises a leather cup sealing ring installed at the end of the oil cylinder piston, and the end of the oil cylinder piston is provided with a groove for installing the leather cup sealing ring.

10. The liquid level stabilizing booster according to claim 1, characterized in that: An oil inlet slot is arranged between the oil cylinder piston on the side of the annular groove facing away from the seal and the inner wall of the oil cavity, and the oil inlet slot is communicated with the annular groove.

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