A vacuum booster for an automobile

Abstract

The utility model discloses a kind of automobile vacuum boosters, belong to vacuum booster technical field, including front shell, the side of front shell is equipped with first air pump, the side of first air pump is equipped with first air duct, the other side of front shell is equipped with rear shell, the side of rear shell is equipped with second air pump, the side of second air pump is equipped with second air duct, the utility model is equipped with diaphragm sliding mechanism, the mechanism can make diaphragm when being increased in one side air pressure, annular plate can be slid in the inside of annular groove, while annular plate drives sliding block to slide in the inside of sliding slot, and make positioning rod and positioning hole correspond to insert, to guarantee the stability of diaphragm sliding process, the utility model is equipped with diaphragm recovery mechanism, the mechanism can make diaphragm after sliding, can be automatically driven diaphragm to reset by the setting of recovery spring, to promote diaphragm and brake pedal fast reset.

Description

Technical Field

[0001] This utility model belongs to the field of vacuum booster technology, specifically relating to an automotive vacuum booster. Background Technology

[0002] A vacuum booster is a device used to increase the force applied by the driver to the pedal. Typically, a vacuum booster is located between the brake pedal and the master cylinder. It mainly consists of a front housing, a rear housing, and a diaphragm. The diaphragm divides the inner cavity into a vacuum chamber and a gas chamber, and the boosting effect is generated by the pressure difference between the two chambers.

[0003] Chinese patent application number 202120635254.6 discloses an automotive vacuum booster, comprising a front shell, a rear shell, and a diaphragm. The front and rear shells are sealed together to form a main cavity. The diaphragm is movable and spaced within the main cavity, and a reset elastic element is connected to the diaphragm. A first chamber is formed between the diaphragm and the front shell, and a vacuuming structure is connected to the front shell. A second chamber is formed between the diaphragm and the rear shell. The edge of the diaphragm has an annular rim, and the inner wall of the front shell has an annular groove. The annular rim is slidably fitted into the annular groove. A transmission structure is connected to the diaphragm. The end of the transmission structure extending to the outer side of the rear shell is used to connect with the brake pedal, and the end of the transmission structure extending to the outer side of the front shell is used to connect with a sensing element. The sensing element sends a start signal to the vacuuming structure when the transmission structure contacts the front shell, thereby vacuuming the first chamber. The original edge contact matching has been improved to a double-sided fit matching between the annular rim and the annular groove, improving the sealing effect and reliability.

[0004] Although the aforementioned patent enables the use of automotive vacuum boosters, the diaphragm, while able to slide due to pressure changes during braking, exhibits relatively poor overall stability. Furthermore, the diaphragm relies heavily on two sets of return springs for recovery during sliding, resulting in a relatively poor overall performance. Additionally, the individual springs are prone to deformation, further degrading the recovery effect. Utility Model Content

[0005] This invention provides an automotive vacuum booster to solve the problems mentioned in the background section.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an automotive vacuum booster, comprising a front housing, a first air pump mounted on the side of the front housing, a first air guide pipe mounted on the side of the first air pump, a rear housing mounted on the other side of the front housing, a second air pump mounted on the side of the rear housing, a second air guide pipe mounted on the side of the second air pump, a connecting rod mounted at the center of the interior of the front housing, a connecting seat mounted at the other end of the connecting rod, a spring mounted inside the connecting rod, a push rod mounted at the other end of the connecting seat, a diaphragm mounted inside the front housing, a diaphragm sliding mechanism mounted on the side of the diaphragm, and a diaphragm return mechanism mounted on the side of the diaphragm near the connecting seat.

[0007] Preferably, the diaphragm sliding mechanism includes an annular plate, a slider, a sliding groove, and an annular slot. An annular plate is installed on the side of the diaphragm, and an annular slot corresponding to the annular plate is opened on the inner wall of the front shell. A slider is installed on the side of the annular plate, and a sliding groove corresponding to the slider is opened on the inner wall of the annular slot.

[0008] Preferably, the diaphragm sliding mechanism further includes a positioning hole and a positioning rod, with the positioning rod installed inside the annular groove and a positioning hole corresponding to the positioning rod opened on the side of the annular plate.

[0009] Preferably, the diaphragm return mechanism includes a return spring, an inner rod, and a sleeve rod. The inner rod is installed on the side of the diaphragm, and the sleeve rod is installed at the other end of the inner rod. The return spring is sleeved on the outer surface of the inner rod and the sleeve rod.

[0010] Preferably, the diaphragm recovery mechanism further includes a limiting groove and a limiting block. The other end of the inner rod is located inside the sleeve rod and a limiting block is installed. The inner wall of the sleeve rod is provided with a limiting groove corresponding to the limiting block.

[0011] Preferably, the diaphragm recovery mechanism further includes an insertion hole, an insertion rod, and a fixing rod. A fixing rod is installed on the side of the limiting block, an insertion rod is installed inside the sleeve rod, and an insertion hole corresponding to the insertion rod is opened inside the fixing rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model incorporates a diaphragm sliding mechanism. When the diaphragm is subjected to an increase in air pressure on one side, it can drive the annular plate to slide inside the annular groove. At the same time, the annular plate drives the slider to slide inside the groove, and the positioning rod is inserted into the positioning hole to ensure the stability of the diaphragm sliding process.

[0014] 2. This utility model incorporates a diaphragm return mechanism, which allows the diaphragm to automatically reset after sliding via a return spring, thereby enabling the diaphragm and brake pedal to return to their original positions quickly. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the present invention;

[0016] Figure 2 This is an enlarged view of the diaphragm sliding mechanism of this utility model;

[0017] Figure 3 This is an enlarged view of the diaphragm recovery mechanism of this utility model;

[0018] In the diagram: 1. Front shell; 2. Connecting rod; 3. Spring; 4. First air guide tube; 5. First air pump; 6. Connecting seat; 7. Rear shell; 8. Diaphragm sliding mechanism; 81. Positioning hole; 82. Annular plate; 83. Slider; 84. Slide groove; 85. Annular groove; 86. Positioning rod; 9. Diaphragm return mechanism; 91. Return spring; 92. Inner rod; 93. Limiting groove; 94. Insertion hole; 95. Insertion rod; 96. Sleeve rod; 97. Fixing rod; 98. Limiting block; 10. Push rod; 11. Diaphragm; 12. Second air guide tube; 13. Second air pump. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1

[0021] Please see Figure 1-3 The present invention provides the following technical solution: an automotive vacuum booster, comprising a front housing 1, a first air pump 5 mounted on the side of the front housing 1, a first air guide pipe 4 mounted on the side of the first air pump 5, a rear housing 7 mounted on the other side of the front housing 1, a second air pump 13 mounted on the side of the rear housing 7, a second air guide pipe 12 mounted on the side of the second air pump 13, a connecting rod 2 mounted at the center of the interior of the front housing 1, a connecting seat 6 mounted at the other end of the connecting rod 2, a spring 3 mounted inside the connecting rod 2, a push rod 10 mounted at the other end of the connecting seat 6, a diaphragm 11 mounted inside the front housing 1, a diaphragm sliding mechanism 8 mounted on the side of the diaphragm 11, and a diaphragm return mechanism 9 mounted on the side of the diaphragm 11 near the connecting seat 6.

[0022] Specifically, the diaphragm sliding mechanism 8 includes an annular plate 82, a slider 83, a groove 84, and an annular groove 85. The annular plate 82 is installed on the side of the diaphragm 11, and the annular groove 85 corresponding to the annular plate 82 is opened on the inner wall of the front shell 1. The slider 83 is installed on the side of the annular plate 82, and the groove 84 corresponding to the slider 83 is opened on the inner wall of the annular groove 85.

[0023] By adopting the above technical solution, when the driver presses the brake pedal, the brake pedal drives the transmission structure and diaphragm 11 to move towards the front shell 1. At the same time, the transmission structure touches the sensing element located on the outside of the front shell 1. The sensing element sends a start signal to the air extraction structure, controlling the air extraction structure to work to draw the first chamber into a vacuum state. The pressure of the first chamber and the second chamber located on both sides of the diaphragm 11 is different, thus forming a pressure difference assist for the diaphragm 11 towards the front shell 1, which amplifies the driver's braking force and makes the actual pedal feel more realistic. When the diaphragm 11 moves towards the front shell 1, it drives the annular plate 82 to slide inside the annular groove 85. At the same time, the sliding of the annular plate 82 drives the slider 83 to slide inside the groove 84.

[0024] Specifically, the diaphragm sliding mechanism 8 also includes a positioning hole 81 and a positioning rod 86. The positioning rod 86 is installed inside the annular groove 85, and the side of the annular plate 82 has a positioning hole 81 corresponding to the positioning rod 86.

[0025] By adopting the above technical solution, when the annular plate 82 slides inside the annular groove 85, it will drive the positioning rod 81 to insert into the positioning hole 86, thereby improving the stability of the sliding process of the diaphragm 11.

[0026] In this embodiment, during use, when the driver depresses the brake pedal, the brake pedal drives the transmission structure and diaphragm 11 to move towards the front housing 1. Simultaneously, the transmission structure contacts the sensing element located on the outside of the front housing 1. The sensing element sends a start signal to the vacuum structure, controlling it to work and create a vacuum in the first chamber. The pressure difference between the first and second chambers on either side of the diaphragm 11 creates a pressure differential assist effect on the diaphragm 11 towards the front housing 1, amplifying the driver's braking force and making the actual braking feel more realistic. As the diaphragm 11 moves towards the front housing 1, it... The moving annular plate 82 drives the interior of the annular groove 85 to slide. At the same time, the sliding of the annular plate 82 drives the slider 83 to drive the interior of the sliding groove 84 to slide. Simultaneously, it will drive the positioning rod 86 to insert into the interior of the positioning hole 81, thereby ensuring the stability of the diaphragm 11 during the sliding process. When the driver releases the brake pedal, the diaphragm 11 moves towards the rear shell 7. At the same time, after the transmission structure separates from the sensing element, the start signal disappears. The sensing element first controls the air extraction structure to inflate the first chamber to increase the internal air pressure, causing the diaphragm 11, the transmission structure and the brake pedal to return to their positions quickly. Then, the sensing element de-energizes the air extraction structure to complete the entire braking process.

[0027] Example 2

[0028] The difference between this embodiment and Embodiment 1 is that the diaphragm return mechanism 9 includes a return spring 91, an inner rod 92, and a sleeve rod 96. The inner rod 92 is installed on the side of the diaphragm 11, and the sleeve rod 96 is installed on the other end of the inner rod 92. The return spring 91 is sleeved on the outer surface of the inner rod 92 and the sleeve rod 96.

[0029] By adopting the above technical solution, when the diaphragm 11 slides toward the inside of the front housing 1, it will drive the inner rod 92 to insert into the inside of the sleeve rod 96, and drive the return spring 91 on the surface to compress. When the driver releases the brake pedal, the return spring 91 returns to its original position, thereby driving the diaphragm 11 to return to its original position.

[0030] Specifically, the diaphragm recovery mechanism 9 also includes a limiting groove 93 and a limiting block 98. The other end of the inner rod 92 is located inside the sleeve rod 96 and a limiting block 98 is installed. The inner wall of the sleeve rod 96 is provided with a limiting groove 93 corresponding to the limiting block 98.

[0031] By adopting the above technical solution, the sliding of the diaphragm 11 will drive the inner rod 92 to slide, and the sliding of the inner rod 92 will drive the limiting block 98 to slide inside the limiting groove 93, thereby improving the stability of the sliding process of the inner rod 92.

[0032] Specifically, the diaphragm recovery mechanism 9 also includes an insertion hole 94, an insertion rod 95, and a fixing rod 97. The fixing rod 97 is installed on the side of the limiting block 98, the insertion rod 95 is installed inside the sleeve rod 96, and the fixing rod 97 has an insertion hole 94 corresponding to the insertion rod 95 inside.

[0033] By adopting the above technical solution, when the limiting block 98 slides, it will drive the insertion hole 94 inside the fixing rod 97 to be inserted into the corresponding insertion rod 95, thereby further improving the stability of the sliding process of the inner rod 92.

[0034] In this embodiment, when the diaphragm 11 slides towards the inside of the front housing 1, it will cause the inner rod 92 to insert into the inside of the sleeve rod 96 and cause the return spring 91 on the surface to compress. When the driver releases the brake pedal, the return spring 91 returns to its original position, thereby causing the diaphragm 11 to return to its original position. The sliding of the diaphragm 11 will cause the inner rod 92 to slide. The sliding of the inner rod 92 will cause the limiting block 98 to slide inside the limiting groove 93, thereby improving the stability of the sliding process of the inner rod 92. When the limiting block 98 slides, it will cause the insertion hole 94 inside the fixing rod 97 to be inserted into the corresponding insertion rod 95, thereby further improving the stability of the sliding process of the inner rod 92.

[0035] The working principle and usage process of this utility model are as follows: During use, when the driver depresses the brake pedal, the brake pedal drives the transmission structure and diaphragm 11 to move towards the front housing 1. Simultaneously, the transmission structure contacts the sensing element located on the outside of the front housing 1. The sensing element sends a start signal to the vacuum structure, controlling it to work and create a vacuum in the first chamber. The pressure difference between the first and second chambers on either side of the diaphragm 11 creates a pressure differential assist to the diaphragm 11 towards the front housing 1, amplifying the driver's braking force and making the actual braking feel more realistic. As the diaphragm 11 moves towards the front housing 1, it drives the annular plate 82 to slide inside the annular groove 85. Simultaneously, the sliding of the annular plate 82 drives the slider 83 to slide inside the sliding groove 84, and also causes the positioning rod 86 to insert into the positioning hole 81, thus ensuring the stability of the diaphragm 11 during sliding. When the driver releases the brake pedal... After the brake pedal is released, the diaphragm 11 moves towards the rear housing 7. At the same time, the start signal disappears after the transmission structure separates from the sensing element. The sensing element first controls the air extraction structure to inflate the first chamber to increase the internal air pressure, causing the diaphragm 11, transmission structure, and brake pedal to quickly return to their original positions. Then, the sensing element de-energizes the air extraction structure to complete the entire braking process. When the diaphragm 11 slides towards the inside of the front housing 1, it will drive the inner rod 92 to insert into the inside of the sleeve rod 96 and drive the return spring 91 on the surface to compress. When the driver releases the brake pedal, the return spring 91 returns to its original position, thereby driving the diaphragm 11 to return to its original position. The sliding of the diaphragm 11 will drive the inner rod 92 to slide. The sliding of the inner rod 92 will drive the limiting block 98 to slide inside the limiting groove 93, thereby improving the stability of the sliding process of the inner rod 92. When the limiting block 98 slides, it will drive the insertion hole 94 inside the fixed rod 97 to be inserted into the corresponding insertion rod 95, thereby further improving the stability of the sliding process of the inner rod 92.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automotive vacuum booster, comprising a front housing, characterized in that: A first air pump is installed on the side of the front shell, and a first air guide pipe is installed on the side of the first air pump. A rear shell is installed on the other side of the front shell, and a second air pump is installed on the side of the rear shell. A second air guide pipe is installed on the side of the second air pump. A connecting rod is installed at the center of the interior of the front shell, and a connecting seat is installed at the other end of the connecting rod. A spring is installed inside the connecting rod, and a push rod is installed at the other end of the connecting seat. A diaphragm is installed inside the front shell, and a diaphragm sliding mechanism is installed on the side of the diaphragm. A diaphragm return mechanism is installed on the side of the diaphragm near the connecting seat.

2. The automotive vacuum booster according to claim 1, characterized in that: The diaphragm sliding mechanism includes an annular plate, a slider, a sliding groove, and an annular slot. An annular plate is installed on the side of the diaphragm, and an annular slot corresponding to the annular plate is opened on the inner wall of the front shell. A slider is installed on the side of the annular plate, and a sliding groove corresponding to the slider is opened on the inner wall of the annular slot.

3. The automotive vacuum booster according to claim 2, characterized in that: The diaphragm sliding mechanism also includes positioning holes and positioning rods. The positioning rods are installed inside the annular groove, and the side of the annular plate has positioning holes corresponding to the positioning rods.

4. The automotive vacuum booster according to claim 1, characterized in that: The diaphragm return mechanism includes a return spring, an inner rod, and a sleeve rod. The inner rod is installed on the side of the diaphragm, and the sleeve rod is installed at the other end of the inner rod. The return spring is sleeved on the outer surface of the inner rod and the sleeve rod.

5. The automotive vacuum booster according to claim 4, characterized in that: The diaphragm recovery mechanism also includes a limiting groove and a limiting block. The other end of the inner rod is located inside the sleeve rod and a limiting block is installed. The inner wall of the sleeve rod is provided with a limiting groove corresponding to the limiting block.

6. The automotive vacuum booster according to claim 5, characterized in that: The diaphragm recovery mechanism also includes an insertion hole, an insertion rod, and a fixing rod. A fixing rod is installed on the side of the limiting block, an insertion rod is installed inside the sleeve rod, and an insertion hole corresponding to the insertion rod is opened inside the fixing rod.

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