Inhaul cable mechanism of automobile inhaul cable type electronic parking brake system

Abstract

The utility model provides an inhaul cable mechanism of an automobile inhaul cable type electronic parking brake system, and belongs to the technical field of automobile electronic parking brake system structures. According to the inhaul cable mechanism, due to the design that the arc-shaped protection pipe is fixedly connected to the balance block, the problems that in inhaul cable type electronic parking brake systems of vehicle types such as micro-face vehicles and van trucks in the prior art, after an end connector of the balance block abrades a plastic coating layer on the periphery of a main inhaul cable and a metal core wire in the main inhaul cable, the inhaul cable type electronic parking brake systems break down, and the service life of the main inhaul cable is affected are solved. And safety accidents are caused. The inhaul cable mechanism comprises a main inhaul cable, a balance block, an auxiliary inhaul cable and a protective pipe. One end of the auxiliary inhaul cable is connected with the right end of the balance block, and the other end is connected with a brake on an automobile right wheel; the protective tube is arc-shaped and is fixedly connected to the balance block, the left end of the protective tube is connected with the left end of the balance block, and the right end of the protective tube extends out of the balance block; one end of the main inhaul cable is connected with a controller, and the other end of the main inhaul cable penetrates in from the right end of the protection pipe, penetrates out from the left end of the protection pipe and then is connected with a brake of an automobile left wheel.

Description

Technical Field

[0001] This utility model belongs to the technical field of automotive electronic parking brake system structure, and in particular relates to a cable mechanism for an automotive cable-type electronic parking brake system. Background Technology

[0002] The automotive cable-operated electronic parking brake system is a transitional parking brake solution that combines traditional mechanical cables with modern electronic control. It retains some physical connection structures while incorporating intelligent control functions. It does not require the development of a new wiring harness layout, utilizing existing cable channels. Therefore, it does not require the reconstruction of the chassis architecture and can be upgraded on a traditional fuel vehicle platform. It perfectly balances the three major factors of cost, reliability, and user experience, and is therefore widely used in low, medium, and high-end vehicles, including microvans and vans.

[0003] The cable and counterweight are the two core mechanical components of this system. Through precise mechanical design, they work together to ensure the system's reliability, stability, and smooth operation. The cable, as the key link between the electric actuator and the brake caliper, converts the motor's rotational motion into linear tension, pushing the brake pads to clamp or release the brake disc. In the event of electronic system failure, the physical cable can be manually pulled to directly apply force to the braking mechanism, meeting the ISO international standard requirements for mechanical backup. The counterweight, by adjusting the center of gravity, keeps the equivalent effective tension of the cable constant at different operating angles, while simultaneously suppressing cable vibration.

[0004] In cable-operated electronic parking brake systems for vehicles such as minivans and vans, there are generally two cables: a main cable and a secondary cable. One end of the main cable is connected to the electronic parking brake controller (hereinafter referred to as the controller), and the other end of the main cable passes through the side of the balance block and then exits from the left end of the balance block to connect to the brake on the left wheel of the vehicle. One end of the secondary cable is connected to the right end of the balance block, and the other end of the secondary cable is connected to the brake on the right wheel of the vehicle (left and right are for illustrative purposes only and do not constitute a limitation).

[0005] One drawback of the above structure is that, because the main cable is equivalent to splitting into two intersecting directions from the counterweight, there is interference friction at the contact point between the main cable and the left end of the counterweight during braking. The counterweight is a metal riveted component, and during long-term braking of the car, the end joint of the counterweight will first wear away the plastic coating of the main cable, and then wear away the internal metal core wire, eventually causing the cable-operated electronic parking brake system to malfunction, and in severe cases, even causing a safety accident. Utility Model Content

[0006] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a cable mechanism for a cable-operated electronic parking brake system for automobiles, which solves the problem that in the prior art, the cable-operated electronic parking brake system of microvans, vans and other vehicles malfunctions and causes safety accidents after the end joint of the balance block wears down the plastic coating layer and the internal metal core wire of the main cable.

[0007] To achieve the above and other related objectives, this utility model provides a cable mechanism for an automotive cable-operated electronic parking brake system, comprising: a main cable, a counterweight, and an auxiliary cable; one end of the auxiliary cable is connected to the right end of the counterweight, and the other end is connected to the brake on the right wheel of the vehicle;

[0008] Also includes:

[0009] The protective tube is arc-shaped and fixed to the balance block. The left end of the protective tube is connected to the left end of the balance block, and the right end of the protective tube extends out of the balance block.

[0010] One end of the main cable is connected to the controller of the cable-operated electronic parking brake system, and the other end passes through the right end of the protective tube, exits from the left end of the protective tube, and then connects to the brake of the left wheel of the car.

[0011] As described above, the cable mechanism of the automotive cable-operated electronic parking brake system of this utility model has at least the following features:

[0012] Beneficial effects:

[0013] The cable mechanism of this automotive cable-operated electronic parking brake system features an arc-shaped protective tube fixed to a counterweight. The left end of the tube connects to the left end of the counterweight, while the right end extends out of the counterweight. One end of the main cable connects to the controller of the cable-operated electronic parking brake system, and the other end enters from the right end of the protective tube, exits from the left end, and connects to the brake of the left wheel. Compared to existing designs where one end of the main cable connects to the controller and the other end enters from the side of the counterweight and exits from the left end to connect to the brake of the left wheel, this protective tube reduces the size of the main cable and the counterweight. The angle between the blocks reduces wear on the cable caused by the end joints of the balance blocks, thus solving the problem in existing cable-operated electronic parking brake systems for vehicles such as microvans and vans where wear on the plastic coating and internal metal core of the main cable by the end joints of the balance blocks leads to malfunctions and safety accidents. Furthermore, the protective tube, fixed to the balance block, does not affect the original layout of the parking brake system, minimizing changes to the overall vehicle and avoiding adverse effects on other vehicle modules due to structural modifications. Moreover, the curved protective tube is easy to manufacture and install, effectively controlling production costs. Attached Figure Description

[0014] Figure 1 The diagram shown is a schematic of the cable mechanism of a cable-operated electronic parking brake system for automobiles according to this utility model.

[0015] Figure 2 The diagram shown is a schematic of the balance block and the protective tube of this utility model.

[0016] Component designation explanation

[0017] 1. Main cable, 2. Balance block, 3. Secondary cable, 4. Protective tube, 5. Controller, 6. Left wheel, 7. Right wheel, 8. Plastic coating, 9. Core wire, 10. End connector. Detailed Implementation

[0018] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0019] Please see Figures 1 to 2 It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0020] The following embodiments are for illustrative purposes only. These embodiments can be combined and are not limited to the content shown in any single embodiment below.

[0021] Please see Figure 1 This utility model provides a cable mechanism for a car cable-type electronic parking brake system. Similar to the cable-type electronic parking brake systems of existing microvans, vans and other vehicles, this mechanism also includes a main cable 1, a balance block 2 and an auxiliary cable 3. One end of the auxiliary cable 3 is connected to the right end of the balance block 2, and the other end is connected to the brake on the right wheel 7 of the car.

[0022] What distinguishes this cable mechanism from existing technologies is that it also includes:

[0023] like Figure 1 and Figure 2 The protective tube 4 shown is arc-shaped and fixed to the balance block 2. The left end of the protective tube 4 connects to the left end of the balance block 2, and the right end of the protective tube 4 extends out of the balance block 2. One end of the main cable 1 is connected to the controller 5 of the cable-operated electronic parking brake system, and the other end enters from the right end of the protective tube 4, exits from the left end, and then connects to the brake of the left wheel 6 of the vehicle. Compared to the prior art where one end of the main cable 1 is connected to the controller 5, and the other end of the main cable 1 enters from the side of the balance block 2 and then exits from the left end of the balance block 2 to connect to the brake of the left wheel 6, the protective tube 4 reduces the distance between the main cable 1 and the balance block 2. The angle between the end joint 10 of the balance block 2 and the cable is reduced, thus solving the problem in the prior art where the cable-type electronic parking brake system of microvans, vans and other vehicles malfunctions and causes safety accidents after the end joint 10 of the balance block 2 wears down the plastic coating layer 8 and the internal metal core wire 9 of the main cable 1. At the same time, the protective tube 4 is fixed to the balance block 2 without affecting the original layout of the parking brake system, and the change to the whole vehicle is small, avoiding adverse effects on other modules of the vehicle due to structural modifications. Moreover, the arc-shaped protective tube 4 is easy to produce and install, and the production cost is effectively controlled.

[0024] In another implementation, please refer to Figure 1 and Figure 2 The balance block 2 has a hollow structure. The outer wall of the protective tube 4 is fixed to the inner wall of the balance block 2, thereby reducing the extra space occupied by the protective tube 4 and reducing potential interference between parts. It also provides a mounting fulcrum for the protective tube 4 and facilitates the installation of pulleys or similar structures inside the balance block 2, so that the balance block 2 can move left and right to ensure the realization of the function of the balance block 2. As for the lateral movement structure of the balance block 2, it has been fully disclosed in the prior art and will not be described in detail here.

[0025] In another implementation, please refer to Figure 1 The balance block 2 and the protective tube 4 are made of the same metal material to facilitate production and subsequent installation.

[0026] In another implementation, please refer to Figure 1 The material of the balance block 2 is cast iron, which has the advantage of low production cost but poor corrosion resistance; or the material of the balance block 2 is aluminum alloy, which has the advantages of being lightweight, having good thermal conductivity and corrosion resistance, but the production cost is higher than that of cast iron; or the material of the balance block 2 is duplex stainless steel, which not only has better corrosion resistance than aluminum alloy, but also has higher yield strength, and correspondingly, the production cost is also the highest.

[0027] In another implementation, please refer to Figure 2The material of the plastic coating layer 8 of the cable is a modified polypropylene or polyethylene mixture. Its advantages are good wear resistance, low-temperature toughness (adapting to changes in vehicle temperature), and resistance to ultraviolet aging. The smooth surface can reduce frictional resistance with the guide / support. The disadvantage is that if it is too thin, it is prone to wear and breakage, and if it is too thick, it will affect the flexibility of the bending radius. Alternatively, the material of the plastic coating layer 8 of the cable is thermoplastic polyurethane elastomer. Its advantages are high elasticity, oil resistance (does not expand or deform when in contact with brake fluid), and excellent tear strength. The disadvantage is that the cost is higher. Alternatively, the material of the plastic coating layer 8 of the cable is nylon, which is suitable for high-temperature areas.

[0028] In another implementation, please refer to Figure 2 The core wire 9 of the cable is made of multiple strands of metal wire twisted together. Twisting is used to improve tensile strength, fatigue life, and uniform stress distribution. The metal wire is made of carbon steel with a galvanized outer layer, which has a certain degree of corrosion resistance and low production cost. Alternatively, the metal wire is made of stainless steel, which has better corrosion resistance than galvanized carbon steel. Or the metal wire is made of titanium-molybdenum alloy, which not only has better corrosion resistance but also reduces weight by 30% compared to stainless steel, but the cost is higher.

[0029] In summary, this utility model features an arc-shaped protective tube 4 fixed to the balance block 2. The left end of the protective tube 4 connects to the left end of the balance block 2, while the right end extends out of the balance block 2. One end of the main cable 1 is connected to the controller 5 of the cable-operated electronic parking brake system, and the other end passes through the right end of the protective tube 4, exits from the left end, and then connects to the brake of the left wheel 6. Compared to the prior art where one end of the main cable 1 is connected to the controller 5, and the other end of the main cable 1 enters from the side of the balance block 2 and then exits from the left end of the balance block 2 to connect to the brake of the left wheel 6, this design reduces the size of the main cable 1 and the balance block. The included angle between the two reduces the wear of the end joint 10 of the balance block 2 on the cable, thus solving the problem in the prior art of cable-type electronic parking brake systems in microvans, vans, and other vehicles where wear on the outer plastic coating layer 8 and the internal metal core wire 9 of the main cable 1 leads to malfunctions and safety accidents. At the same time, the protective tube 4, fixed to the balance block 2, does not affect the original layout of the parking brake system, resulting in minimal changes to the overall vehicle and avoiding adverse effects on other vehicle modules due to structural modifications. Furthermore, the arc-shaped protective tube 4 is easy to manufacture and install, effectively controlling production costs. Therefore, this utility model effectively overcomes the shortcomings of the prior art and has high industrial application value.

[0030] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A cable mechanism for a car cable-operated electronic parking brake system, comprising: Main cable, counterweight, and auxiliary cable; One end of the auxiliary cable is connected to the right end of the balance block, and the other end is connected to the brake on the right wheel of the car. Its characteristic is that it further includes: The protective tube is arc-shaped and fixed to the balance block. The left end of the protective tube is connected to the left end of the balance block, and the right end of the protective tube extends out of the balance block. One end of the main cable is connected to the controller of the cable-operated electronic parking brake system, and the other end passes through the right end of the protective tube, exits from the left end of the protective tube, and then connects to the brake of the left wheel of the car.

2. The cable mechanism of a cable-operated electronic parking brake system for automobiles according to claim 1, characterized in that: The balance block has a hollow structure, and the outer wall of the protective tube is fixedly connected to the inner wall of the balance block.

3. The cable mechanism of a cable-operated electronic parking brake system for automobiles according to claim 1, characterized in that: The balance block and the protective tube are made of the same metal material.

4. The cable mechanism of a cable-operated electronic parking brake system for automobiles according to claim 3, characterized in that: The balance block is made of cast iron, aluminum alloy, or duplex stainless steel.

5. The cable mechanism of a cable-operated electronic parking brake system for automobiles according to claim 1, characterized in that: The plastic coating of the cable is made of modified polypropylene, thermoplastic polyurethane elastomer, or nylon.

6. The cable mechanism of a cable-operated electronic parking brake system for automobiles according to claim 1, characterized in that: The core wire of the cable is made of multiple strands of metal wire twisted together. The metal wire is made of carbon steel, stainless steel, or titanium-molybdenum alloy with a galvanized outer layer.

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