A heavy-duty truck brake drum of ductile cast iron

Abstract

The utility model relates to the technical field of automobile manufacturing, especially to nodular cast iron heavy truck brake drum, include: drum body, heat dissipation subassembly and shock absorber disc, heat dissipation subassembly connects on drum body, heat dissipation subassembly includes heat dissipation disc, cooling hole, heat exchange pipe, cooling pipe, fixed ring, fixed block, memory alloy spring and connecting piece, heat dissipation disc connects in drum body outer wall, and the outer wall of heat dissipation disc all is set up with a plurality of cooling holes, and the inside connection cooling pipe of cooling hole, and the inside movable connection heat exchange pipe of cooling pipe, and the inner wall connection fixed ring of cooling pipe, and fixed ring connects fixed block, and fixed block sets opening and memory alloy spring connection, and connecting piece sets up on cooling pipe, shock absorber disc connects in drum body bottom, the utility model discloses through being installed memory alloy spring in the heat exchange pipe inner wall near rotating axle b place, makes cooling system to advance into high -efficient working condition, solves the problem of response lag, reaches nodular cast iron heavy truck brake drum practicability.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing technology, and in particular to a ductile iron heavy-duty truck brake drum. Background Technology

[0002] Braking systems for heavy-duty vehicles are crucial for ensuring the safe and efficient operation of large vehicles, as their weight and inertia make braking requirements far greater than those for light-duty vehicles. Efficient braking systems can effectively decelerate and stop vehicles to avoid accidents and improve driving stability. They can also reduce brake fatigue, extend the service life of brake components, thereby reducing maintenance costs and improving overall operating efficiency. Commonly used brake types are disc brakes and drum brakes, with drum brakes being the traditional braking system for heavy-duty vehicles.

[0003] Chinese Patent CN223062988U discloses a novel heavy-duty vehicle brake drum, comprising a drum body. The top of the drum body has multiple heat dissipation holes. A heat dissipation plate is fixedly connected to the outer wall of the drum body. The outer wall of the heat dissipation plate has multiple cooling holes. A cooling pipe is fixedly connected to the inner wall of each cooling hole. A heat exchange pipe is slidably connected to the inner wall of the cooling pipe. A cooling pipe is fixedly connected to the inner wall of the heat exchange pipe. A flow-limiting orifice is fixedly connected to the inner wall of the cooling pipe. In this invention, the rotation of the drum body drives the heat dissipation plate to rotate. Centrifugal force causes the liquid in the heat exchange pipe to flow and exchange heat with the liquid in the cooling pipe, achieving active and long-term cooling of the brake drum. This avoids high-temperature deformation of the brake drum, which can lead to a decrease in vehicle braking performance, improving vehicle safety and reducing the probability of accidents.

[0004] In high-frequency braking scenarios on long downhill slopes, the existing brake drums, although the liquid cooling system composed of heat exchange pipes and cooling pipes can achieve active cooling, in the initial braking stage, when the drum body temperature has not reached the critical value, the liquid flow speed driven by centrifugal force is slow, resulting in a lag in the response of the cooling system and an inability to quickly intervene in temperature control, which reduces the practicality of heavy-duty vehicle brake drums. Utility Model Content

[0005] To address the problems existing in the background technology, a ductile iron heavy-duty truck brake drum is proposed.

[0006] This utility model proposes a ductile iron heavy-duty truck brake drum, comprising: a drum body, a heat dissipation assembly, and a shock-absorbing disc;

[0007] The heat dissipation component is connected to the drum body;

[0008] The heat dissipation components include a heat sink, cooling holes, heat exchange tubes, cooling pipes, retaining rings, retaining blocks, shape memory alloy springs, and connectors;

[0009] The heat sink is connected to the outer wall of the drum body. Multiple cooling holes are opened on the outer wall of the heat sink. Cooling pipes are connected inside the cooling holes. Heat exchange pipes are movably connected inside the cooling pipes. Fixing rings are connected to the inner wall of the cooling pipes. Fixing rings are connected to fixing blocks. Fixing blocks are provided with openings and are connected to shape memory alloy springs. Connectors are set on the cooling pipes.

[0010] The shock-absorbing disc is connected to the bottom of the drum body.

[0011] Preferably, the inner wall of the drum is connected to a shock-absorbing pad, and an air trough a is provided in the middle of the drum body, with air trough a and air trough b provided at the bottom of the inner wall.

[0012] Preferably, the bottom of the air duct b is connected to the interior of the shock absorber.

[0013] Preferably, the top of the drum body is provided with multiple heat dissipation holes, and the top of the inner wall of the drum body is connected with a mounting ring, the top of which is provided with mounting holes.

[0014] Preferably, the connecting component includes a stop block, a limiting ring, a connecting rod, a rotating shaft a, and a rotating shaft b;

[0015] The baffle is slidably connected to the inner wall of the flow limiting hole, and the flow limiting hole is set on the cooling pipe. The bottom of the baffle is rotatably connected to the rotating shaft a, the outer wall of the rotating shaft a is rotatably connected to the connecting rod, and the bottom end of the connecting rod is rotatably connected to the rotating shaft b.

[0016] Preferably, the shape memory alloy spring is positioned close to the rotating shaft b, and the outer wall of the rotating shaft b is rotatably connected to the inside of the cooling tube.

[0017] Preferably, the top of the cooling pipe is connected to a sealing ring, and multiple cooling pipes are fixed at the same water level.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects:

[0019] This invention adds a shape memory alloy spring sheet to the inner wall of the heat exchange tube near the rotating shaft b. When the drum temperature is lower than the normal temperature, the shape memory alloy spring sheet is in a contracted state and does not affect the automatic flow of liquid. When the temperature exceeds the normal temperature or before the high temperature critical value, the shape memory alloy spring sheet expands due to heat, causing the push linkage to actively increase the gap between the stop and the flow limiting hole with the second rotating shaft as the fulcrum, accelerating the flow speed of coolant, enabling the cooling system to enter the efficient working state in advance, solving the response lag problem, and improving the practicality of ductile iron heavy truck brake drums. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the drum body structure in this utility model;

[0022] Figure 3 This is a schematic diagram of the cooling component structure in this utility model;

[0023] Figure 4 This is a schematic diagram of the connecting component structure in this utility model;

[0024] Figure 5 This is a schematic diagram of the shock-absorbing disc structure in this utility model.

[0025] Reference numerals in the attached diagram: 1. Drum body; 101. Vibration damping pad; 102. Air duct a; 103. Air duct b; 2. Heat sink; 201. Cooling hole; 3. Heat exchange tube; 301. Cooling tube; 302. Sealing ring; 303. Fixing ring; 304. Fixing block; 305. Memory alloy spring; 306. Stop block; 307. Limiting ring; 308. Connecting rod; 309. Rotating shaft a; 310. Rotating shaft b; 4. Heat dissipation hole; 5. Mounting ring; 6. Mounting hole; 7. Vibration damping plate. Detailed Implementation

[0026] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0027] Example 1

[0028] like Figure 1 - Figure 5 As shown, the present invention proposes a ductile iron heavy-duty truck brake drum, comprising: a drum body 1, a heat dissipation assembly, and a shock-absorbing disc 7; the heat dissipation assembly is connected to the drum body 1; the heat dissipation assembly includes a heat dissipation disc 2, cooling holes 201, heat exchange tubes 3, cooling pipes 301, a fixing ring 303, a fixing block 304, a shape memory alloy spring 305, and a connector; the heat dissipation disc 2 is connected to the outer wall of the drum body 1, and multiple cooling holes 201 are provided on the outer wall of the heat dissipation disc 2. The cooling pipes 301 are connected inside the cooling holes 201, and the heat exchange tubes 301 are movably connected inside the cooling pipes 301. The fixing rings 303 are connected to the inner wall of the cooling pipes 301, and the fixing rings 303 are connected to the fixing blocks 304. The fixing blocks 304 have openings and are connected to the shape memory alloy springs 305. The connector is provided on the cooling pipes 301; the shock-absorbing disc 7 is connected to the bottom of the drum body 1. By adding shape memory alloy springs 305, the convenient cooling system can enter a high-efficiency working state in advance, solving the problem of response lag and improving the practicality of ductile iron heavy truck brake drums.

[0029] To further explain, the inner wall of the drum body 1 is connected to the shock-absorbing pad 101, and the middle of the inner wall of the drum body 1 is provided with an air duct a102. The air duct a102 and the bottom of the inner wall are provided with an air duct b103. The bottom of the air duct b103 is connected to the interior of the shock-absorbing plate 7. Multiple heat dissipation holes 4 are opened on the top of the drum body 1. The top of the inner wall of the drum body 1 is connected to a mounting ring 5, and the top of the mounting ring 5 is provided with mounting holes 6. Multiple inclined grooves are opened on the outer wall of the shock absorber 7. The inclined grooves are inclined cylindrical holes. The bottom of the shock absorber 7 is connected to the isolation pad, which is made of polyurethane composite material. The compressed air in the air duct a102 flows to the shock absorber 7 through the air duct b103 and is blown out through the inclined groove. The isolation pad ensures that it can absorb vibration while being durable. The shock absorber pad 101 reduces the vibration when the brake shoe rubs against the inside of the drum body 1, improving the use of ductile iron heavy truck brake drum. The drum body 1 is made of ductile iron, which improves the practicality, strength and wear resistance of the drum body 1. The mounting hole 6 allows for connection and fixation with other components.

[0030] Example 2

[0031] like Figure 3 and Figure 4 As shown, this utility model proposes a ductile iron heavy-duty truck brake drum. Based on the above embodiments, this embodiment also details the specific components of the connecting parts and their mating methods.

[0032] Further explanation: The connecting components include a stop block 306, a limiting ring 307, a connecting rod 308, a rotating shaft a309, and a rotating shaft b310; the stop block 306 is slidably connected to the inner wall of the flow-limiting hole, and the flow-limiting hole is set on the cooling tube 301; the bottom of the stop block 306 is rotatably connected to the rotating shaft a309; the outer wall of the rotating shaft a309 is rotatably connected to the connecting rod 308; the bottom end of the connecting rod 308 is rotatably connected to the rotating shaft b310; a shape memory alloy spring 305 is set close to the rotating shaft b310; the outer wall of the rotating shaft b310 and the inside of the cooling tube 301 are rotatably connected; a sealing ring 302 is connected to the top of the cooling tube 301; and multiple cooling tubes 301 are all fixed at the same water level. A nameplate is placed near the edge of the top of the heat exchanger 2, displaying information about the brake drum for easy identification and use. The sealing ring 302 ensures a good seal between the heat exchanger pipe 3 and the cooling pipe 301, improving the connection and cooperation of the heat dissipation components. When a heavy vehicle brakes repeatedly or encounters a long downhill section, frequent braking causes the temperature of the drum body 1 to rise. The drum body 1 rotates along with the wheel, causing the heat exchanger 2 to rotate as well. Centrifugal force forces the liquid inside the heat exchanger pipe 3 to flow within it. This flow pushes the baffle 306 away from the flow-limiting orifice, allowing the liquid to flow smoothly. Rod 308 rotates along rotating shaft b310 and rotating shaft a309, thereby moving the stop block 306 backward along the limit ring 307. Conversely, when the flow is directed, the stop block 306 is brought into contact with the inner wall of the flow limiting hole, ensuring the direction of the flow. When the flow enters the cooling pipe 301, it will exchange heat with the liquid in the cooling pipe 301. When the cooled liquid flows to the other end of the heat exchange pipe 3, it will exchange heat with the outer wall of the drum body 1. At the same time, the liquid in the cooling pipe 301 will be cooled by the air flow in the cooling hole 201. Gas will also be blown into the drum body 1 from the heat dissipation hole 4 to cool it down at the same time.

[0033] The working principle of this utility model is as follows: A fixing ring 303 is installed inside the heat exchange tube 3 near the rotating shaft b310. The fixing ring 303 drives the fixing block 304. The fixing block 304 is connected to the shape memory alloy spring 305 through an opening, so that the shape memory alloy spring 305 is positioned close to the rotating shaft b310. The shape memory alloy spring 305 corresponds to the drum body 1 being in a contracted state when the temperature is below 150°C. 150°C is below the normal temperature of the drum body 1, so as not to affect the natural flow of liquid. When the brake drum temperature exceeds 180°C or before the critical value, the shape memory alloy spring 305 is heated. The expansion causes the push link 308 to increase the distance between the stop block 306 and the flow restrictor with the rotating shaft b310 as the fulcrum, thereby accelerating the flow speed of the liquid and enabling the heat dissipation and cooling system to enter a highly efficient working state in advance. This solves the problem of response lag. While maintaining the original advantages of active cooling and noise reduction, this new type of heavy-duty vehicle brake drum improves the response time of the cooling system and enhances the practicality of ductile iron heavy-duty truck brake drums. This improves the reliability and safety of the brake drum under complex working conditions of heavy-duty vehicles. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0034] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A ductile iron heavy-duty truck brake drum, characterized in that, include: Drum body (1); A heat dissipation component is connected to the drum body (1); The heat dissipation assembly includes a heat sink (2), cooling holes (201), heat exchange tubes (3), cooling tubes (301), a retaining ring (303), a retaining block (304), a shape memory alloy spring (305), and connectors; The heat sink (2) is connected to the outer wall of the drum (1). The outer wall of the heat sink (2) is provided with multiple cooling holes (201). The cooling holes (201) are connected to the cooling tubes (301). The cooling tubes (301) are movably connected to the heat exchange tubes (3). The inner wall of the cooling tubes (301) is connected to the fixing rings (303). The fixing rings (303) are connected to the fixing blocks (304). The fixing blocks (304) are provided with openings and connected to the shape memory alloy springs (305). The connecting parts are provided on the cooling tubes (301). And a shock absorber (7) is connected to the bottom of the drum body (1).

2. The ductile iron heavy-duty truck brake drum according to claim 1, characterized in that, The inner wall of the drum body (1) is connected to the shock-absorbing pad (101), and the middle of the drum body (1) is provided with an air trough a (102), and the air trough a (102) and the bottom of the inner wall are provided with an air trough b (103).

3. The ductile iron heavy-duty truck brake drum according to claim 2, characterized in that, The bottom of the air duct b (103) is connected to the interior of the shock absorber plate (7).

4. A ductile iron heavy-duty truck brake drum according to claim 2, characterized in that, Multiple heat dissipation holes (4) are provided on the top of the drum body (1), and an installation ring (5) is connected to the top of the inner wall of the drum body (1). An installation hole (6) is provided on the top of the installation ring (5).

5. A ductile iron heavy-duty truck brake drum according to claim 1, characterized in that, The connecting components include a stop (306), a limiting ring (307), a connecting rod (308), a rotating shaft a (309), and a rotating shaft b (310); The baffle (306) is slidably connected to the inner wall of the flow limiting hole, and the flow limiting hole is set on the cooling pipe (301). The bottom of the baffle (306) is rotatably connected to the rotating shaft a (309), the outer wall of the rotating shaft a (309) is rotatably connected to the connecting rod (308), and the bottom end of the connecting rod (308) is rotatably connected to the rotating shaft b (310).

6. A ductile iron heavy-duty truck brake drum according to claim 5, characterized in that, The shape memory alloy spring (305) is positioned close to the rotating shaft b (310), and the outer wall of the rotating shaft b (310) is rotatably connected to the inside of the cooling tube (301).

7. A ductile iron heavy-duty truck brake drum according to claim 6, characterized in that, The top end of the cooling pipe (301) is connected to a sealing ring (302), and multiple cooling pipes (301) are fixed at the same water level.

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