Electronic power-assisted brake transmission rack

Abstract

The utility model discloses an electronic power-assisted brake transmission rack which comprises a transmission rack body, a hollow structure, a transmission tooth and a wear-resistant block, the hollow structure is arranged in the transmission rack body and penetrates through the transmission rack body, a weight reduction cavity is formed in the transmission rack body, grinding lines are arranged on the tooth surface of the transmission tooth, and the wear-resistant block is arranged on the transmission tooth. A groove body is formed in the back of the transmission rack body, and a wear-resisting block is embedded in the groove body. The weight of the rack is greatly reduced due to the hollow structure, and the energy consumption of the whole vehicle is reduced. The wear-resistant block is embedded in a groove body in the back of the rack and is made of a high-hardness composite material, so that the wear resistance is improved, and the meshing noise is reduced. And the transmission efficiency is high, and the brake response time is shortened due to the involute tooth profile design. And the modular design is suitable for various braking systems, and the installation efficiency is improved. In conclusion, the utility model provides the electronic power-assisted brake transmission rack which has the advantages of light weight, high wear resistance, low noise and high transmission efficiency.

Description

TECHNICAL FIELD

[0001] The utility model belongs to new energy automobile brake system technical field, concretely relates to an electronic power brake transmission rack. BACKGROUND

[0002] The electronic power brake rack is an important component of the electronic power brake system of a new energy automobile. It monitors the vehicle state and the braking intention of the driver in real time through an electronic control unit (ECU) and drives an electric motor or a hydraulic pump to provide power assistance for the brake system. This design aims to improve the accuracy, response speed, and driving comfort of braking while reducing energy consumption and emissions. The electronic power brake system is one of the core components of a new energy automobile. It monitors the vehicle state and the braking intention of the driver in real time through an electronic control unit (ECU) and drives the actuator to provide precise power assistance.

[0003] Traditional transmission racks are mostly solid structures, which have the following defects: 1. Heavy weight: The solid design makes the components heavy, increasing the energy consumption of the whole vehicle and not meeting the lightweight requirements of new energy vehicles. 2. Poor wear resistance: The rack and the transmission teeth are in long-term engagement, which is easy to wear and produce noise, affecting the driving comfort and the service life of the components. 3. Low transmission efficiency: The insufficient precision of the tooth design leads to a delay in the response of the braking force, affecting the safety of braking. 4. Complex installation: The traditional rack structure is redundant and has poor compatibility with surrounding components, increasing the assembly cost.

[0004] Although the existing technology improvement scheme such as the vacuum power pump can partially improve the braking efficiency, it still cannot solve the problems of lightweight and noise. Therefore, there is an urgent need for a transmission rack that has the advantages of lightweight, high wear resistance, low noise, and high transmission efficiency. UTILITY MODEL CONTENTS

[0005] To solve the problems in the above background technology, the utility model aims to provide a transmission rack for an electronic power brake that has the advantages of lightweight, high wear resistance, low noise, and high transmission efficiency.

[0006] To achieve the above technical purpose, the utility model adopts the following technical scheme:

[0007] An electronic power brake transmission rack includes a transmission rack body, a hollow structure, a transmission tooth, and a wear-resistant block. The transmission rack body has a hollow structure inside. The hollow structure penetrates the transmission rack body and forms a weight reduction cavity inside. The tooth surface of the transmission tooth is provided with grinding lines. The back of the transmission rack body is provided with a groove. The groove is embedded with a wear-resistant block.

[0008] Further limited, the groove and the wear-resistant block are in interference fit. This structure design can ensure the stability of the overall structure.

[0009] Further limited, the tooth profile of the transmission tooth is an involute structure, and the grinding trace is a spiral shape. Such a structural design reduces friction resistance and improves transmission efficiency.

[0010] Further limited, the cross section of the hollow structure is an ellipse or a rectangle, and the cavity wall thickness of the hollow structure is 1.5-2.5mm. Such a structural design reduces the weight of the part through the weight reduction cavity formed by the hollow structure.

[0011] Further limited, the wear-resistant block is made of silicon carbide ceramic or silicon nitride composite material, and the hardness is greater than or equal to 90HRA. Such a structural design can improve wear resistance and reduce meshing noise.

[0012] Further limited, the transmission rack body is made of medium carbon steel.

[0013] Further limited, the roughness Ra of the grinding trace is less than or equal to 0.4μm.

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

[0015] 1. Light weight: the hollow structure greatly reduces the weight of the rack, reduces the energy consumption of the whole vehicle, and realizes the light weight of the part.

[0016] 2. Low noise: the wear-resistant block is embedded in the groove in the back of the rack, and high-hardness composite material is used to improve wear resistance and reduce meshing noise. Meanwhile, the wear-resistant block also cooperates with the grinding trace to further reduce the running noise.

[0017] 3. High transmission efficiency: the involute tooth profile design shortens the brake response time, realizes the rapid response and precise control of the braking force.

[0018] 4. Easy assembly: the modular design is suitable for various brake systems, and the installation efficiency is improved.

[0019] In summary, the utility model provides an electronic power brake transmission rack which has the advantages of light weight, high wear resistance, low noise and high transmission efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] The utility model can be further illustrated by the non-limiting embodiments shown in the drawings;

[0021] Figure 1 It is a structure schematic view of an embodiment of the electronic power brake transmission rack of the utility model;

[0022] Figure 2 It is a structure schematic view of an embodiment of the electronic power brake transmission rack of the utility model;

[0023] Figure 3 It is a structure schematic view of an embodiment of the electronic power brake transmission rack of the utility model;

[0024] Figure 4 Figure 1 is a structural schematic diagram of an embodiment of the electronic power-assisted brake transmission rack of the present application.

[0025] The main element symbols are explained as follows: transmission rack body 1, hollow structure 2, transmission teeth 3, groove body 4, wear-resistant block 5, grinding lines 6. DETAILED DESCRIPTION

[0026] In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0027] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary skilled in the art without creative labor are within the scope of protection of the present application.

[0029] As Figure 1The utility model discloses an electronic power brake transmission rack, including transmission rack body 1, hollow structure 2, transmission tooth 3 and wear -resistant piece 5, hollow structure 2 is provided with in transmission rack body 1 inside, hollow structure 2 penetrates transmission rack body 1, and the inside forms weight reduction cavity, the tooth surface of transmission tooth 3 is provided with grinding lines 6, the back of transmission rack body 1 is provided with groove 4, and wear -resistant piece 5 is inlaid in the inside of groove 4.

[0030] In the practical application of the embodiment, the groove 4 and the wear-resistant piece 5 are in interference fit. Such a structure design can ensure the stability of the overall structure.

[0031] In the practical application of the embodiment, the tooth shape of the transmission tooth 3 is an involute structure, and the grinding lines 6 are spiral. Such a structure design reduces frictional resistance and improves transmission efficiency.

[0032] In the practical application of the embodiment, the cross section of the hollow structure 2 is oval or rectangular, and the cavity wall thickness of the hollow structure 2 is 1.5-2.5 mm. Such a structure design reduces the weight of the components by forming a weight reduction cavity in the hollow structure.

[0033] In the practical application of the embodiment, the wear-resistant piece 5 is made of silicon carbide ceramic or silicon nitride composite material, and the hardness is ≥90HRA. Such a structure design can improve wear resistance and reduce meshing noise.

[0034] In the practical application of the embodiment, the transmission rack body 1 is made of medium carbon steel.

[0035] In the practical application of the embodiment, the roughness Ra of the grinding lines 6 is ≤0.4 μm.

[0036] The working process and principle of the utility model include the following steps:

[0037] The hollow structure 2 is prepared by extrusion molding process, and then the transmission tooth 3 and the groove 4 are machined by numerical control milling;

[0038] Then, the wear-resistant piece 5 is heated to 200-250°C and pressed into the groove 4.

[0039] The transmission rack body 1 of the utility model adopts the hollow structure 2, forms a weight reduction cavity inside, and reduces the weight of the components. The wear-resistant piece 5 is inlaid in the groove 4 at the back of the rack, adopts high-hardness composite material, improves wear resistance, and reduces meshing noise. The transmission tooth 3 is precisely machined to form an involute tooth shape, the tooth surface is provided with grinding lines 6, frictional resistance is reduced, and transmission efficiency is improved. The groove 4 is designed with a back slot, and is in interference fit with the wear-resistant piece 5 to ensure the stability of the structure.

[0040] Example 1

[0041] The transmission rack body 1 is made of 7075-T6 aluminum alloy, the hollow structure 2 is an elliptical section with a wall thickness of 2.0 mm, the groove body 4 has a depth of 3 mm, and the wear-resistant block 5 is made of silicon carbide ceramic. The transmission teeth 3 are machined by a five-axis numerical control machine tool, the tooth surface is laser polished to form a spiral thread 6, and the roughness Ra=0.3 μm.

[0042] Example 2

[0043] The same as example 1 is not described again, the difference is that the hollow structure 2 is changed to a rectangular section with a wall thickness of 1.8 mm, the transmission rack body 1 is made of titanium alloy Ti-6Al-4V, and the wear-resistant block 5 is replaced by silicon nitride composite material. The grinding thread 6 is polished by a chemical polishing process, and the roughness Ra=0.35 μm.

[0044] Example 3

[0045] The same as example 1 is not described again, the difference is that the groove body 4 is designed as double-row staggered grooves, the wear-resistant block 5 is segmented and embedded, the hollow structure 2 is filled with porous sound-absorbing material such as polyurethane foam, and the noise is further reduced to below 60 dB.

[0046] Through bench test, the transmission rack brake response time of the utility model is ≤0.08 seconds, the noise is ≤63 dB, the weight is reduced by about 38% compared with traditional products, and the demand of new energy vehicles for high efficiency, silence and light weight is met.

[0047] The above examples only illustrate the principle and effect of the utility model, and are not used to limit the utility model. Any person skilled in the art can modify or change the above examples without departing from the spirit and scope of the utility model. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought of the utility model should be covered by the claims of the utility model.

Claims

1. An electronically assisted brake transmission rack characterised in that: Including transmission rack body (1), hollow structure (2), transmission gear (3) and wear block (5), the transmission rack body (1) is internally provided with hollow structure (2), the hollow structure (2) is through transmission rack body (1), and the inside is formed with weight reduction cavity, the tooth surface of transmission gear (3) is provided with grinding lines (6), the back of transmission rack body (1) is provided with groove (4), and the inside of groove (4) is inlaid with wear block (5).

2. An electronically assisted brake transmission rack according to claim 1, characterised in that: The groove (4) is in interference fit with the wear block (5).

3. An electronically assisted brake transmission rack according to claim 1, wherein: The tooth shape of the transmission gear (3) is an involute structure, and the grinding lines (6) are spiral.

4. An electronically assisted brake transmission rack according to claim 1, wherein: The cross section of the hollow structure (2) is oval or rectangular, and the cavity wall thickness of the hollow structure (2) is 1.5-2.5mm.

5. An electronically assisted brake transmission rack according to claim 1, wherein: The wear block (5) is made of silicon carbide ceramic or silicon nitride composite material, and the hardness is greater than or equal to 90HRA.

6. An electronically assisted brake transmission rack as claimed in claim 1, characterised in that: The transmission rack body (1) is made of medium carbon steel.

7. An electronically assisted brake transmission rack as claimed in claim 1, characterised in that: The roughness Ra of the grinding lines (6) is less than or equal to 0.4μm.

Images