Lightweight anti-lock brake

Abstract

The utility model relates to vehicle braking technical field more specifically, it relates to a kind of lightweight anti-lock brake, including shell, the piston of being equipped with oil passage and being connected with the driving element push-pull block, shell is non-wear-resistant material shell, piston is movably arranged in shell, push-pull block is connected with piston telescopic along the activity direction of piston, further include guide rod, guide rod is fixedly arranged in shell, the length direction of guide rod is parallel to the activity direction of push-pull block, push-pull block is sleeved on guide rod, and first gap is formed between push-pull block and the inner wall of shell, a kind of lightweight anti-lock brake of the utility model effectively avoids the abrasion of push-pull block to shell in the movement process, reduces the situation that metal scrap exists in oil, reduces the risk of oil pollution.

Description

Technical Field

[0001] This utility model relates to the field of vehicle braking technology, and in particular to a lightweight anti-lock braking system. Background Technology

[0002] Anti-lock braking systems (ABS) are safety brakes used in vehicles. When a vehicle's wheels are about to lock up, the ABS can prevent wheel lockup by applying high-frequency intermittent braking, thus keeping the vehicle under control.

[0003] Based on different anti-lock braking principles, there are currently several types of anti-lock brakes. One type includes a housing, a piston with an oil passage, and a push-pull block for external drive. The piston divides the housing into a first cavity for connecting a brake trigger (such as a grip) and a second cavity for connecting a brake actuator (such as a disc brake). The push-pull block is connected to the piston and controls its reciprocating motion. During anti-lock braking, as the push-pull block pushes and pulls the piston, it not only throttles the brakes but also causes the volume of the second cavity to change repeatedly, resulting in continuous changes in the braking pressure of the brake actuator, achieving a high-frequency, intermittent braking effect to prevent lock-up.

[0004] Nowadays, in pursuit of product lightweighting to facilitate the installation of similar anti-lock braking systems (ABS) on bicycles, e-bikes, and other two-wheeled vehicles, ABS housings are often made of lightweight materials such as aluminum alloys. However, some lightweight materials may have poor wear resistance. If the push-pull block guides the brake by maintaining contact with the inner wall of the housing, metal debris can easily accumulate in the hydraulic fluid, causing contamination. Utility Model Content

[0005] To address the problems existing in the background art, this application provides a lightweight anti-lock braking system.

[0006] The lightweight anti-lock braking system provided by this utility model adopts the following technical solution:

[0007] A lightweight anti-lock braking system (ABS) includes a housing, a piston with an oil passage, and a push-pull block connected to a drive component. The housing is made of a non-wear-resistant material. The piston is movably disposed within the housing. The push-pull block is telescopically connected to the piston along its direction of movement. The system further includes a guide rod, which is fixedly disposed within the housing. The length of the guide rod is parallel to the direction of movement of the push-pull block. The push-pull block is sleeved on the guide rod, and a first gap is formed between the push-pull block and the inner wall of the housing.

[0008] Preferably, two guide rods are provided.

[0009] Preferably, the two guide rods are distributed on the left and right sides of the piston.

[0010] Preferably, the two guide rods are distributed laterally along the push-pull block, and the lateral dimension of the push-pull block is greater than its longitudinal dimension.

[0011] Preferably, the guide rod is a round rod.

[0012] Preferably, the two opposite inner walls of the housing are respectively provided with a first insertion hole and a second insertion hole, and the first insertion hole and the second insertion hole are respectively for the two ends of the guide rod to be inserted.

[0013] Preferably, the housing is provided with a cover, which is used to open and close the internal space of the housing, and the inner wall of the cover serves as one of the inner walls of the housing, and the second insertion hole is opened on the inner wall of the cover.

[0014] Preferably, the depth of the first socket is greater than the depth of the second socket.

[0015] Preferably, it also includes a preload spring, which is sleeved on the guide rod, and the two ends of the preload spring abut against the push-pull block and the inner wall of the housing, respectively.

[0016] Preferably, the piston has a sealing groove circumferentially formed, and a sealing ring is fitted into the sealing groove. The sealing ring abuts against the piston and the inner wall of the housing, and a second gap is formed between the outer wall of the piston and the inner wall of the housing.

[0017] The beneficial effects of this utility model are as follows:

[0018] During anti-lock braking, as the push-pull block reciprocates against the piston, the two guide rods guide the movement of the push-pull block, ensuring that the push-pull block moves along a predetermined path. Since the push-pull block maintains a first gap with the inner wall of the housing, it can effectively prevent wear on the housing during the movement of the push-pull block, reduce the presence of metal debris in the oil, and reduce the risk of oil contamination. Attached Figure Description

[0019] Figure 1 This is a structural cross-sectional view of the lightweight anti-lock braking system in the embodiments of this application.

[0020] Explanation of reference numerals in the attached drawings: 1. Housing; 11. First cavity; 12. Second cavity; 2. Fork tube; 3. Piston; 31. Oil passage; 32. Sealing ring; 4. Push-pull block; 5. Eccentric shaft; 6. Guide rod; 61. First insertion hole; 62. Second insertion hole; 7. Cover; 8. Preload spring; 9. Positioning pin. Detailed Implementation

[0021] The following will combine Figure 1 The present invention will be further described in conjunction with the embodiments.

[0022] This embodiment discloses a lightweight anti-lock braking system.

[0023] Reference Figure 1 The lightweight anti-lock braking system includes a housing 1. In this embodiment, the housing 1 is preferably an aluminum alloy housing. The aluminum alloy housing has lightweight material properties, making the anti-lock braking system more suitable for two-wheeled vehicles with lightweight requirements, such as bicycles, electric bicycles, and electric bicycles. It can be preferably installed on the bicycle front fork tube 2 and / or rear fork tube to provide anti-lock braking effect for the front wheel and / or rear wheel of the bicycle.

[0024] Reference Figure 1 The housing 1 has a cavity and a first port and a second port connected to the cavity. The first port and the second port are connected to the vehicle's brake trigger and brake actuator respectively through oil circuits. For example, the first port is connected to the vehicle's grip through an oil circuit, and the second port is connected to the vehicle's disc brake through an oil circuit, so that the braking pressure generated at the grip is transmitted to the disc brake after passing through the anti-lock brake.

[0025] Reference Figure 1 The lightweight anti-lock braking system also includes a piston 3, which is disposed inside the housing 1. The piston 3 divides the cavity inside the housing 1 into a first cavity 11 and a second cavity 12. The first cavity 11 is connected to a first port, and the second cavity 12 is connected to a second port. The piston 3 has an axially formed oil passage 31 for oil to flow between the first cavity 11 and the second cavity 12. The piston 3 is axially reciprocating within the housing 1, so that the volumes of the first cavity 11 and the second cavity 12 change inversely proportionally with the movement of the piston 3.

[0026] Reference Figure 1 The lightweight anti-lock braking system also includes a push-pull block 4, which is movably disposed within the second cavity 12 of the housing 1. The push-pull block 4 is axially and telescopically connected to the end of the piston 3, and is used to push and pull the piston 3. When the push-pull block 4 retracts relative to the piston 3 and pushes the piston 3, it blocks the oil passage 31 and expands the volume of the second cavity 12, thereby reducing the braking pressure at the brake actuator. When the push-pull block 4 extends relative to the piston 3 and pulls the piston 3, it opens the oil passage 31 and restores the volume of the second cavity 12, thereby restoring the braking pressure at the brake actuator. Finally, during the reciprocating pushing and pulling of the piston 3 by the push-pull block 4, the brake actuator will repeatedly depressurize and maintain pressure, thereby achieving the anti-lock effect through high-frequency intermittent braking.

[0027] Reference Figure 1The lightweight anti-lock braking system also includes a drive component. In this embodiment, the drive component is a motor. The motor is connected to the oblong hole of the push-pull block 4 through the eccentric shaft 5, so that the rotational motion of the motor can be converted into the linear reciprocating motion of the push-pull block 4.

[0028] Reference Figure 1 Although the aluminum alloy housing can bring the benefit of lightweighting to the anti-lock brake, the poor wear resistance of the aluminum alloy housing means that if the push-pull block 4 is guided by maintaining contact with the inner wall of the aluminum alloy housing, metal debris can easily be present in the oil, causing oil contamination. To solve this problem, in this application, the lightweight anti-lock brake also includes a guide rod 6, which is preferably a wear-resistant rod, such as chromium-molybdenum alloy steel. The guide rod 6 is fixedly installed in the cavity of the housing 1, and the length direction of the guide rod 6 is parallel to the movement direction of the push-pull block 4. The push-pull block 4 is sleeved on the guide rod 6, and a first gap is formed between the push-pull block 4 and the inner wall of the housing 1.

[0029] Reference Figure 1 The guide rod 6 is a round rod, which is a standardized, finely ground or polished bar material. The manufacturing process is mature, and the mass production cost is lower than that of square rods. Therefore, using a round rod for the guide rod 6 optimizes the cost of the anti-lock braking system. Two guide rods 6 are provided. The arrangement of two guide rods 6 effectively constrains the rotational freedom of the push-pull block 4, ensuring that the push-pull block 4 maintains only a straight path for pushing and pulling the piston 3, avoiding the rotational problems that may occur in a single guide rod 6 system. The two guide rods 6 are distributed on the left and right sides of the piston 3, specifically along the transverse direction of the push-pull block 4. By symmetrically distributing the two guide rods 6, the pressure generated during the guiding process can be more evenly distributed on both guide rods 6, preventing excessive pressure on a single guide rod 6. Furthermore, the transverse dimension of the push-pull block 4 is larger than its longitudinal dimension. By distributing the two guide rods 6 along the transverse direction of the push-pull block 4, the span between the two guide rods 6 can be increased, thereby more effectively balancing the overturning moment and reducing the risk of slider jamming, vibration, or accelerated wear.

[0030] Reference Figure 1 The second cavity 12 of the housing 1 has a first insertion hole 61 and a second insertion hole 62 on its two opposite inner walls. The first insertion hole 61 and the second insertion hole 62 are respectively used for the two ends of a single guide rod 6 to be inserted. Since there are two guide rods 6, there are correspondingly two first insertion holes 61 and two insertion holes 62. In order to facilitate the insertion of the two ends of the guide rod 6 into the first insertion hole 61 and the second insertion hole 62, the two ends of the guide rod 6 are also chamfered.

[0031] Reference Figure 1A cover 7 is detachably provided on one side of the housing 1. The cover 7 is used to open and close the cavity of the housing 1 to facilitate the assembly and disassembly of the structure inside the cavity. In this embodiment, the inner wall of the cover 7 serves as the inner wall of one side of the cavity of the housing 1. The second insertion hole 62 is opened on the inner wall of the cover 7. When the cover 7 is opened, the two guide rods 6 are in a detachable state. When the cover 7 is closed, the two guide rods 6 are in a stable installation state, achieving the effect of facilitating the assembly and disassembly of the guide rods 6. Furthermore, both the first insertion hole 61 and the second insertion hole 62 are interference-fitted with the guide rods 6. The interference of the first insertion rod is greater than that of the second insertion rod, and the depth of the first insertion hole 61 is greater than the depth of the second insertion hole 62. This makes the end of the guide rod 6 inserted into the first insertion hole 61 more stable than the end inserted into the second insertion hole 62. Thus, after the cover 7 is opened, the guide rod 6 can still be fixed on the first insertion rod, preventing it from being easily pulled out when the cover 7 is opened, thereby reducing the risk of accidental disassembly.

[0032] Reference Figure 1 The lightweight anti-lock braking system also includes a preload spring 8, which is located within the second cavity 12. The two ends of the preload spring 8 abut against the inner walls of the push-pull block 4 and the housing 1, respectively. The preload spring 8 accumulates elastic force when the push-pull block 4 pulls the piston 3 and releases elastic force when the push-pull block 4 pushes the piston 3. Since the oil passage is blocked when the push-pull block 4 pushes the piston 3, the push-pull block 4 requires significant power to overcome the oil pressure and move. The release of the preload spring 8 at this time reduces the power output of the drive component, thereby effectively reducing the size of the drive component.

[0033] Reference Figure 1 There are two preload springs 8. The two preload springs 8 are respectively sleeved on the two guide rods 6. The two guide rods 6 can maintain the positional stability of the two preload springs 8, so that the preload springs 8 can stably perform their assisting function.

[0034] Reference Figure 1 The piston 3 has a circumferentially circumferentially formed sealing groove, and a sealing ring 32 is fitted into the sealing groove. The sealing ring 32 abuts against the inner wall of the piston 3 and the housing 1. When the push-pull block 4 blocks the oil passage 31 of the piston 3 to isolate the first cavity 11 from the second cavity 12, the sealing ring 32 is used to ensure the sealing between the outer side of the piston 3 and the inner wall of the cavity. Furthermore, a second gap is formed between the outer wall of the piston 3 and the inner wall of the housing 1.

[0035] Reference Figure 1 A pin hole is provided between the piston 3 and the push-pull block 4, and a positioning pin 9 is inserted into the pin hole. The positioning pin 9 can restrict the rotational freedom of the piston 3 without affecting the extension and retraction of the push-pull block 4 relative to the piston 3, so that the piston 3 can only maintain the degree of freedom of movement on the straight path and avoid the adverse effects of abnormal rotation.

[0036] The implementation principle of a lightweight anti-lock braking system in this embodiment is as follows: During the anti-lock braking process, as the push-pull block 4 reciprocates against the piston 3, the two guide rods 6 can guide the movement of the push-pull block 4, ensuring that the push-pull block 4 moves along a predetermined path. Since the push-pull block 4 and the piston 3 maintain a first gap and a second gap with the inner wall of the housing 1 respectively, the wear of the push-pull block 4 and the piston 3 on the housing 1 during the movement can be effectively avoided, reducing the presence of metal debris in the oil and reducing the risk of oil contamination.

[0037] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A lightweight anti-lock braking system (ABS) comprising a housing (1), a piston (3) having an oil passage (31), and a push-pull block (4) connected to a drive component, wherein the housing (1) is made of a non-wear-resistant material, the piston (3) is movably disposed within the housing (1), and the push-pull block (4) is telescopically connected to the piston (3) along the direction of movement of the piston (3), characterized in that: It also includes a guide rod (6), which is fixedly installed inside the housing (1). The length direction of the guide rod (6) is parallel to the movement direction of the push-pull block (4). The push-pull block (4) is sleeved on the guide rod (6), and a first gap is formed between the push-pull block (4) and the inner wall of the housing (1).

2. A lightweight anti-lock braking system according to claim 1, characterized in that: Two guide rods (6) are provided.

3. A lightweight anti-lock braking system according to claim 2, characterized in that: The two guide rods (6) are distributed on the left and right sides of the piston (3).

4. A lightweight anti-lock braking system according to claim 3, characterized in that: The two guide rods (6) are distributed laterally along the push-pull block (4), and the lateral dimension of the push-pull block (4) is greater than the longitudinal dimension.

5. A lightweight anti-lock braking system according to claim 1, characterized in that: The guide rod (6) is a round rod.

6. A lightweight anti-lock braking system according to claim 1, characterized in that: The housing (1) has a first insertion hole (61) and a second insertion hole (62) on its two opposite inner walls, respectively, and the first insertion hole (61) and the second insertion hole (62) are respectively used for the two ends of the guide rod (6) to be inserted.

7. A lightweight anti-lock braking system according to claim 6, characterized in that: The housing (1) is provided with a cover (7), which is used to open and close the internal space of the housing (1). The inner wall of the cover (7) serves as one of the inner walls of the housing (1), and the second insertion hole (62) is opened on the inner wall of the cover (7).

8. A lightweight anti-lock braking system according to claim 7, characterized in that: The depth of the first socket (61) is greater than the depth of the second socket (62).

9. A lightweight anti-lock braking system according to claim 1, characterized in that: It also includes a preload spring (8), which is sleeved on the guide rod (6), and the two ends of the preload spring (8) abut against the push-pull block (4) and the inner wall of the housing (1), respectively.

10. A lightweight anti-lock braking system according to claim 1, characterized in that: The piston (3) has a sealing groove in its circumference, and a sealing ring (32) is fitted in the sealing groove. The sealing ring (32) abuts against the inner wall of the piston (3) and the housing (1), and a second gap is formed between the outer wall of the piston (3) and the inner wall of the housing (1).

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