Vacuum booster push rod, brake system assembly and vehicle

Abstract

The utility model relates to the technical field of vehicle braking systems, and particularly discloses a vacuum booster push rod, a braking system assembly and a vehicle, the vacuum booster push rod comprises a push rod shaft and a connecting piece, one end of the push rod shaft is provided with a ball head, the ball head is used for being connected with a vacuum booster, and the connecting piece is provided with a connecting part and a hinging part. A threaded part is arranged at the other end of the push rod shaft, a threaded hole is formed in the connecting part and is in threaded connection with the threaded part, and the hinge part is of a plate-shaped structure, is used for being hinged to a pedal arm and is arranged on one side of the pedal arm. The hinged part of the connecting piece is arranged to be of the plate-shaped structure and is arranged on one side of the pedal arm, the connecting piece is in threaded connection with the push rod shaft while hinged connection is achieved, the connecting piece can be matched with push rod shafts of various specifications or sizes, and therefore the use scene is widened. The hinge part is arranged to be of the plate-shaped structure, the production process is simpler, the size of the plate-shaped structure is smaller, the weight is lighter, and improvement of light weight is better facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle braking systems, in particular to a vacuum booster push rod, a braking system assembly and a vehicle. Background Technique

[0002] A vehicle braking system adopting a vacuum booster form is provided with a vacuum booster. When the brake pedal is depressed, the pedal arm of the brake pedal drives the vacuum booster push rod to move. The other end of the vacuum booster push rod is connected to the vacuum booster. Thus, under the action of the vacuum booster, the piston of the master cylinder moves, and the brake fluid reaches the caliper through the brake pipeline, thereby braking the vehicle. The magnitude of the braking force depends on the amplitude of depressing the brake pedal. Therefore, the vacuum booster push rod often adopts a rigid part and is usually provided with a U-shaped fork structure to be connected to the pedal arm. However, the manufacturing process of the U-shaped fork structure is relatively cumbersome, including at least processes such as blanking, forming and punching. Moreover, the volume and weight of the U-shaped fork structure are relatively large, which is not conducive to weight reduction. Content of the Utility Model

[0003] The purpose of the utility model is to provide a vacuum booster push rod, a braking system assembly and a vehicle to solve the problems of cumbersome manufacturing process and unfavorable weight reduction existing in the prior art.

[0004] The utility model provides a vacuum booster push rod, which includes a push rod shaft and a connecting piece. One end of the push rod shaft is provided with a ball head, and the ball head is used for connecting with the vacuum booster. The connecting piece is provided with a connecting portion and a hinged portion. The other end of the push rod shaft is provided with a threaded portion. The connecting portion is provided with a threaded hole, and the threaded hole is threadedly connected with the threaded portion. The hinged portion is a plate-like structure and is used for hinged connection with the pedal arm. The hinged portion is arranged on one side of the pedal arm.

[0005] As a preferred technical solution of the vacuum booster push rod, it further includes a locking piece, and the locking piece is used for locking the threaded portion in the threaded hole.

[0006] As a preferred technical solution of the vacuum booster push rod, the locking piece is a nut, and the nut is threadedly connected to the threaded portion and can be abutted against the connecting portion.

[0007] As a preferred technical solution of the vacuum booster push rod, there are two nuts, and both of the two nuts are threadedly connected to the threaded portion to form a double-nut structure and are abutted against the connecting portion.

[0008] As a preferred technical solution of the vacuum booster push rod, the hinged portion is arranged parallel to the pedal arm, the hinged portion is provided with a hinged hole, and the extension line of the axis of the hinged hole is perpendicular to the side surface of the pedal arm.

[0009] As a preferred technical solution of the vacuum booster push rod, the hinged part is hingedly connected to the pedal arm through a hinge shaft.

[0010] The utility model provides a brake system assembly, including a brake pedal, a mounting bracket, and a vacuum booster push rod according to any of the above solutions. The brake pedal is provided with a mounting hole, and a rotating shaft passes through the mounting hole and rotatably connects the brake pedal to the mounting bracket. The hinged part is hingedly connected to the pedal arm of the brake pedal.

[0011] As a preferred technical solution of the brake system assembly, the mounting hole is set as an oblong hole, and the rotating shaft is arranged in the oblong hole.

[0012] As a preferred technical solution of the brake system assembly, the brake pedal includes a pedal pad and the pedal arm, and the pedal pad is detachably connected to the pedal arm.

[0013] The utility model provides a vehicle, including the brake system assembly according to the above solution.

[0014] The beneficial effects of the utility model are:

[0015] The utility model provides a vacuum booster push rod, which sets the hinged part of the connecting piece as a plate-like structure and arranges it on one side of the pedal arm. While realizing the hinged connection, the connecting piece is threadedly connected to the push rod shaft. The connecting piece can adapt to push rod shafts of various specifications or sizes, thereby broadening the usage scenarios. Setting the hinged part as a plate-like structure makes the production process simpler, and the plate-like structure has a smaller volume and lighter weight, which is more conducive to the improvement of lightweight.

[0016] The utility model provides a brake system assembly. By setting the vacuum booster push rod of the utility model, the lightweight of the brake system assembly is improved.

[0017] The utility model provides a vehicle. By setting the brake system assembly of the utility model, the local production process is simplified and the local lightweight is improved. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the connection between the vacuum booster push rod and the brake pedal in the embodiment of the utility model;

[0019] Figure 2 It is a schematic structural diagram of the vacuum booster push rod in the embodiment of the utility model;

[0020] Figure 3 It is a schematic structural diagram of the connection between the vacuum booster push rod and the brake pedal in another embodiment of the utility model.

[0021] In the figure:

[0022] 1. Push rod shaft; 11. Ball head; 12. Threaded part; 13. First nut; 14. Second nut; 2. Connecting member; 21. Connecting part; 22. Hinge part; 221. Hinge hole; 3. Hinge shaft; 4. Pedal arm; 41. Mounting hole; 5. Pedal pad. Detailed implementation manner

[0023] The technical solution of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0024] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature has a lower horizontal height than the second feature.

[0025] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "mount", "connect" and "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0026] The embodiments of the present utility model are described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0027] As Figure 1 - Figure 2 shown, the present utility model provides a push rod of a vacuum booster, which includes a push rod shaft 1 and a connecting member 2. The push rod shaft 1 and the connecting member 2 are detachably connected. One end of the push rod shaft 1 is provided with a ball head 11, and the other end is provided with a threaded portion 12. The ball head 11 is used to connect with the vacuum booster, and the threaded portion 12 is used to threadedly connect with the connecting member 2. The connecting member 2 is provided with a connecting portion 21 and a hinged portion 22. The connecting portion 21 is provided with a threaded hole, and the threaded hole is threadedly connected with the threaded portion 12. The hinged portion 22 is arranged in a plate-like structure and is used to be hingedly connected with the pedal arm 4. The hinged portion 22 is arranged on one side of the pedal arm 4. When the brake pedal is depressed, driven by the pedal arm 4, the connecting member 2 and the push rod shaft 1 move synchronously, and the connecting member 2 rotates relative to the pedal arm 4. The ball head 11 of the push rod shaft 1 pushes the vacuum booster assembly, so that the master cylinder supplies oil to the brake pipeline to achieve braking. The hinged portion 22 of the connecting member 2 is arranged in a plate-like structure, and the connecting portion 21 is arranged in a cylindrical structure. There is a smooth transition between the hinged portion 22 and the connecting portion 21. On the one hand, it ensures the structural strength of the connecting member 2 and avoids damage caused by local stress concentration. On the other hand, it can minimize the volume and weight of the connecting member 2 to the greatest extent while ensuring the structural strength, so as to facilitate weight reduction. For the U-shaped fork structure in the prior art, its production process requires at least processes such as blanking, forming and machining. In this embodiment, the hinged portion 22 of the connecting member 2 is arranged in a plate-like structure. From the production process, it can be directly machined after casting. In contrast, the production process of the connecting member 2 in this embodiment is simpler. In addition, the push rod shaft 1 and the connecting member 2 are threadedly connected. Therefore, when applicable to brake system assemblies with different layout forms, different specifications of push rod shafts 1 can be selected as required, and only the threaded portion 12 of the push rod shaft 1 needs to be matched with the connecting portion 21 of the connecting member 2, improving the standardization degree of parts and reducing the number of spare part models.

[0028] Furthermore, please refer to Figure 2 shown, the push rod of the vacuum booster further includes a locking member. The locking member is used to lock the threaded portion 12 in the threaded hole of the connecting portion 21, so that the push rod shaft 1 and the connecting member 2 are combined into a rigid body, ensuring the effective transmission of the movement of the brake pedal and making the different amplitudes of stepping on the brake pedal and the braking force uniquely determined. The locking member can be a locking screw or a nut. In this embodiment, a nut is preferably used. When the locking member is a locking screw, the locking screw is threadedly connected to the outside of the connecting portion 21 and can be abutted against the threaded portion 12 in the threaded hole to achieve locking. When the locking member is a nut, the nut is threadedly connected to the threaded portion 12 of the push rod shaft 1 and can be abutted against the connecting portion 21. After the threaded portion 12 and the connecting portion 21 are threadedly connected in place, the nut is screwed towards the connecting member 2 until it abuts against the connecting portion 21, so as to achieve the locking of the connecting member 2 and the push rod shaft 1 through the principle of double-thread locking.

[0029] Optionally, two nuts are provided. Both nuts are threadedly connected to the threaded portion 12 to form a double-nut structure and are abutted against the connecting portion 21. In this embodiment, the two nuts are a first nut 13 and a second nut 14 respectively. The first nut 13 is arranged close to the connecting member 2, and the second nut 14 is located on the side of the first nut 13 away from the connecting member 2. After the threaded portion 12 is threadedly connected to the connecting portion 21 in place, first screw the first nut 13 towards the connecting member 2 until it abuts against the connecting portion 21, and then screw the second nut 14 towards the first nut 13 until it abuts against the first nut 13. Thus, the first nut 13 and the second nut 14 form a double-nut structure, further enhancing the locking effect on the connecting member 2 and the push rod shaft 1.

[0030] Furthermore, the hinged portion 22 of the plate-like structure is arranged parallel to the pedal arm 4. The hinged portion 22 is provided with a hinged hole 221, and the extension line of the axis of the hinged hole 221 is perpendicular to the side surface of the pedal arm 4. After the brake pedal is depressed, the pedal arm 4 moves and drives the vacuum booster push rod to move. At the same time, relative rotation occurs between the hinged portion 22 and the pedal arm 4. Since the hinged portion 22 is arranged parallel to the pedal arm 4 and the extension line of the axis of the hinged hole 221 is perpendicular to the side surface of the pedal arm 4, there is no relative friction during the rotation of the hinged portion 22 relative to the pedal arm 4, reducing the wear of the components. One of the hinged portion 22 and the pedal arm 4 can be provided with a rotating shaft, and the other is rotatably sleeved on the rotating shaft; or the hinged portion 22 and the pedal arm 4 are hingedly connected by an additional hinge shaft 3. In this embodiment, it is preferably that the hinged portion 22 and the pedal arm 4 are hingedly connected by the hinge shaft 3, so that the hinge shaft 3 can be replaced separately when wear occurs, reducing the maintenance cost. One end of the hinge shaft 3 is connected to the pedal arm 4, and the other end passes through the hinged hole 221 of the hinged portion 22, and necessary limiting members are provided to limit the relative positions of the connecting member 2 and the pedal arm 4 to prevent the hinge shaft 3 from falling off. The structure of providing limiting members on the hinge shaft 3 to prevent relevant components from coming off can be selected from the existing technologies, so it will not be elaborated here.

[0031] The present utility model provides a brake system assembly, including a brake pedal, a mounting bracket, and the vacuum booster push rod in this embodiment. The mounting bracket is used to mount the brake pedal. The pedal arm 4 of the brake pedal is provided with a mounting hole 41, and a rotating shaft passes through the mounting hole 41 and rotatably connects the brake pedal to the mounting bracket. The hinged portion 22 is hingedly connected to the pedal arm 4 of the brake pedal. By providing the vacuum booster push rod in this embodiment, the weight of the brake system assembly is reduced, and its degree of light weight is improved.

[0032] Optionally, as Figure 3As shown, in other embodiments of the present utility model, the mounting hole 41 on the pedal arm 4 is provided as an oblong hole, and the rotating shaft is arranged in the oblong hole. The braking pedal force and the braking pedal stroke when stepping on the braking pedal can be changed by changing the position of the rotating shaft in the oblong hole.

[0033] Optionally, the pedal pad 5 of the braking pedal is detachably connected to the pedal arm 4, so that pedal pads 5 with different slopes can be replaced according to the usage habits of different users, improving the human-machine matching degree and the user experience.

[0034] The present utility model provides a vehicle, including the braking system assembly in this embodiment. By setting the braking system assembly in this embodiment, the local production process of the vehicle is simplified and the local light weight is improved.

[0035] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limiting the implementation manners of the present utility model. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the claims of the present utility model.

Claims

1. Vacuum booster push rod, characterized in that, Comprising: A push rod shaft (1), one end of the push rod shaft (1) is provided with a ball head (11), and the ball head (11) is used for connecting with a vacuum booster; A connecting member (2), the connecting member (2) is provided with a connecting portion (21) and a hinged portion (22), the other end of the push rod shaft (1) is provided with a threaded portion (12), the connecting portion (21) is provided with a threaded hole, the threaded hole is threadedly connected with the threaded portion (12), the hinged portion (22) is a plate-like structure and is used for hinged connection with a pedal arm (4), and the hinged portion (22) is arranged on one side of the pedal arm (4).

2. The push rod of the vacuum booster according to claim 1, characterized in that, It further comprises a locking member, and the locking member is used for locking the threaded portion (12) in the threaded hole.

3. The vacuum booster push rod according to claim 2, characterized in that, The locking member is a nut, and the nut is threadedly connected to the threaded portion (12) and can be abutted against the connecting portion (21).

4. The push rod of the vacuum booster according to claim 3, wherein There are two nuts, and both of the two nuts are threadedly connected to the threaded portion (12) to form a double-nut structure and are abutted against the connecting portion (21).

5. The push rod of the vacuum booster according to claim 1, wherein, The hinged portion (22) is arranged in parallel with the pedal arm (4), the hinged portion (22) is provided with a hinged hole (221), and the extension line of the axis of the hinged hole (221) is perpendicular to the side surface of the pedal arm (4).

6. The push rod of the vacuum booster according to claim 5, characterized in that, The hinged portion (22) and the pedal arm (4) are hinged and connected through a hinge shaft (3).

7. Brake system assembly, characterized in that, Comprising a brake pedal, a mounting bracket and a vacuum booster push rod as described in any one of claims 1-6, the brake pedal is provided with a mounting hole (41), a rotating shaft passes through the mounting hole (41) and rotatably connects the brake pedal to the mounting bracket, and the hinged portion (22) is hinged and connected to the pedal arm (4) of the brake pedal.

8. The brake system assembly according to claim 7, characterized in that, The mounting hole (41) is arranged as an oblong hole, and the rotating shaft is arranged in the oblong hole.

9. The brake system assembly according to claim 7, wherein The brake pedal comprises a pedal pad (5) and the pedal arm (4), and the pedal pad (5) is detachably connected to the pedal arm (4).

10. A vehicle, characterized in that, Comprising a brake system assembly as described in any one of claims 7-9.

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