A high-temperature resistant tensioning wheel

Abstract

This application provides a high-temperature resistant tensioning wheel, including a support arm with a protruding extension and a bearing plate at both ends. The protruding extension has a connecting base for connecting to the vehicle body. The bearing plate has a protruding shaft and a roller is sleeved on it. Both sides of the roller have recesses, and the outer periphery of the roller has heat dissipation holes. The cooperation between the heat dissipation holes and the recesses can accelerate the flow of gas, thereby achieving a heat dissipation effect. The roller also has a receiving part with a through hole. The receiving part has a cavity with an overflow hole. One end of the overflow hole extends into the through hole. The receiving part also has a liquid inlet, which communicates with the cavity. External oil is introduced into the cavity through the liquid inlet and delivered to the connection between the roller and the protruding shaft through the overflow hole, thereby achieving lubrication of the contact position and avoiding overheating caused by dry friction, thus giving the tensioning wheel a high-temperature resistant effect.

Description

Technical Field

[0001] This application relates to the field of tensioner technology, and in particular to a high-temperature resistant tensioner. Background Technology

[0002] Tensioner pulleys are key auxiliary components in automotive transmission systems. They are mainly used to address the loosening of belts or chains due to wear, thermal expansion and contraction, and stretching during long-term use, ensuring the stable and efficient operation of the transmission system. They are widely used in core assemblies such as engines and gearboxes. During vehicle operation, tensioner pulleys are constantly exposed to high temperatures. However, existing tensioner pulleys lack heat dissipation structures, which can easily damage the material properties of key components, leading to tensioning failure and potential safety hazards. Utility Model Content

[0003] The purpose of this invention is to provide a high-temperature resistant tensioning wheel to solve the above-mentioned problems.

[0004] The technical solution of this application is implemented as follows:

[0005] This application provides a high-temperature resistant tensioning wheel, including a support arm, one end of the support arm has a protruding extension, the protruding extension has a connecting base, the other end of the support arm has a bearing plate, the bearing plate has a protruding shaft, a roller is sleeved on the protruding shaft, both sides of the roller are provided with recesses, the outer periphery of the roller is provided with heat dissipation holes, the heat dissipation holes are connected to the recesses, and a number of heat dissipation holes are provided and are spaced apart along the circumferential direction of the roller.

[0006] The roller also has a receiving part, which has a through hole through which the convex shaft passes. The receiving part has a cavity, which has an overflow hole. One end of the overflow hole extends into the through hole. Several overflow holes are provided and are spaced apart along the circumferential direction of the receiving part.

[0007] A liquid inlet is provided on the side of the receiving part away from the bearing plate, and the liquid inlet is connected to the cavity.

[0008] In one embodiment, a flow guiding component is provided in the recess, the flow guiding component is composed of two sets of spaced flow guiding plates, and the heat dissipation hole is located between the two sets of flow guiding plates;

[0009] Several flow guiding components are provided and distributed at intervals along the circumference of the roller component. The number of flow guiding components is the same as the number of heat dissipation holes.

[0010] In one embodiment, the outer periphery of the roller component is also provided with a groove for filling with lubricating oil, and the heat dissipation hole is located between two adjacent sets of grooves.

[0011] In one embodiment, the overflow hole is provided with inclined ends on both sides. By cooperating with the inclined ends, the diameter of the overflow hole away from the through hole is larger than the diameter of the overflow hole on the side closer to the through hole.

[0012] In one embodiment, the protruding extension has an opening, and a torsion spring is disposed in the opening. One end of the torsion spring is connected to the inner wall of the opening, and the other end is connected to the connecting base.

[0013] In one embodiment, the convex shaft has a threaded groove, a screw is threadedly connected to the threaded groove, and a pad is provided on the screw.

[0014] When the roller is fitted onto the cam and connected to the screw, the pad abuts against the receiving part.

[0015] In one embodiment, the deflector has an arc-shaped end, and two adjacent sets of deflectors face the same direction and form an airflow guiding area.

[0016] The advantages or beneficial effects of the above technical solutions include at least the following:

[0017] This application discloses a high-temperature resistant tensioning wheel, which is connected to a connecting base and a bearing plate via a support arm. A convex shaft on the bearing plate connects to a roller component. The roller component contacts the transmission belt or chain to perform the tensioning operation. Because the roller component has recesses on both sides with heat dissipation holes, external air can enter the heat dissipation holes through the recesses and be located at the contact position between the roller component and the transmission component during operation, thereby reducing the heat generated during contact. Furthermore, because the receiving part of the roller component has a cavity with overflow holes, when the cavity is filled with lubricating oil, the oil can flow between the roller component and the convex shaft, thereby providing lubrication during rotation, avoiding heat generated by friction, and cooperating with the heat dissipation holes to achieve a high-temperature resistance effect. This solves the problem that existing tensioning wheels lack a heat dissipation structure for themselves, which easily leads to tensioning failure and safety hazards. Attached Figure Description

[0018] The accompanying drawings illustrate exemplary embodiments of the present application and, together with the description thereof, serve to explain the principles of the present application. These drawings are included to provide a further understanding of the present application and are incorporated in and constitute a part of this specification.

[0019] Figure 1 An exploded view of the tensioning wheel according to an embodiment of this application is shown;

[0020] Figure 2 A structural schematic diagram of the tensioning wheel from one perspective of an embodiment of this application is shown;

[0021] Figure 3 A structural schematic diagram of the roller component according to an embodiment of this application is provided;

[0022] Figure 4 A cross-sectional structural schematic diagram of the roller component according to an embodiment of this application is shown;

[0023] Figure 5 Examples of this application are presented. Figure 4 Enlarged view of point A in the middle;

[0024] Reference numerals: 1. Support arm; 11. Protruding extension; 111. Torsion spring; 12. Bearing plate; 121. Protruding shaft;

[0025] 2. Connect the base;

[0026] 3. Roller component; 31. Recessed portion; 32. Heat dissipation hole; 33. Receiving portion; 331. Through hole; 332. Cavity; 333. Overflow hole; 3331. Inclined end; 334. Liquid inlet port; 34. Groove;

[0027] 4. Deflector plate; 41. Arc-shaped end;

[0028] 5. Screw; 51. Spacer block. Detailed Implementation

[0029] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While some embodiments of this application are shown in the drawings, it should be understood that this application can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this application. It should be understood that the drawings and embodiments of this application are for illustrative purposes only and are not intended to limit the scope of protection of this application.

[0030] It should be noted that, where there is no conflict, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] It should be understood that the term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc., mentioned in this application are used only to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0032] It should be noted that the terms "a" and "several" used in this application are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0033] The names of the messages or information exchanged between multiple devices in the embodiments of this application are for illustrative purposes only and are not intended to limit the scope of these messages or information.

[0034] Reference Figures 1-4 A high-temperature resistant tensioning wheel is provided, wherein the roller component 3 has recesses 31 on both sides and heat dissipation holes 32 on the outer periphery of the roller component 3. The heat dissipation holes 32 are connected to the recesses 31 and are arranged in several ways and distributed at intervals along the circumference of the roller component 3. The roller component 3 is the core rotating component of the tensioning wheel. During operation, it generates a large amount of heat due to friction with the belt and internal bushing. The design of the recesses 31 on both sides can significantly increase its surface area without increasing the overall volume of the roller component 3. At the same time, the heat dissipation holes 32 penetrate the outer periphery of the roller component 3 and are connected to the recesses 31, forming a three-dimensional heat dissipation channel on the outer periphery, inside and on both sides. The low-temperature air outside can contact the recesses 31 and the inner wall of the heat dissipation holes 32 and carry away the heat through heat conduction, effectively reducing the body temperature of the roller component 3 and avoiding local high temperature caused by heat concentration.

[0035] The roller component 3 also has a receiving part 33, which is provided with a through hole 331 through which the convex shaft component 121 passes. The receiving part 33 has a cavity 332, and an overflow hole 333 is provided in the cavity 332. One end of the overflow hole 333 extends into the through hole 331. Several overflow holes 333 are provided and are spaced apart along the circumferential direction of the receiving part 33. The cavity 332 of the receiving part 33 is a lubricating oil storage cavity, which can be injected with high-temperature grease. When the convex shaft component 121 passes through the through hole 331 and mates with the receiving part 33, the lubricating oil in the cavity 332 will continuously penetrate into the mating gap between the convex shaft component 121 and the through hole 331 through capillary action or rotational centrifugal force, forming a stable oil film layer that converts the dry friction between the components into wet friction.

[0036] The receiving part 33 is provided with a liquid inlet 334 on the side away from the bearing plate 12. The liquid inlet 334 is connected to the cavity 332. When adding lubricating oil, simply connect the oil gun to the liquid inlet 334 to directly inject oil into the cavity 332 without disassembling any parts, which greatly shortens the maintenance time.

[0037] Based on the above structure, the connecting base 2 is connected to the vehicle body component via the support arm 1, and the roller 3 is sleeved on the convex shaft 121 provided on the bearing plate 12, so that the roller 3 can rotate around the convex shaft 121 as the center, and the outer periphery of the roller 3 abuts against the belt to achieve tension during the transmission process. Since the roller 3 has heat dissipation holes 32 communicating with the recessed part 31, external air enters into the recessed part 31 and flows through the heat dissipation holes 32 during rotation, thereby reducing the tension between the outer periphery of the roller 3 and the belt. Contact temperature achieves heat dissipation. When the roller 3 and the cam shaft 121 rotate, friction is generated. By introducing external oil into the cavity 332 through the liquid inlet 334 and allowing it to permeate through the overflow hole 333 to the inner wall of the roller 3 and the outer periphery of the cam shaft 121, a lubrication effect is achieved. This reduces the friction between the two parts, avoids dry friction and high temperature caused by lack of oil, and solves the problem of insufficient heat dissipation of the existing tension wheel, which leads to a large amount of heat generated during operation, resulting in high temperature on the tension wheel and affecting the service life of the product.

[0038] In one embodiment, reference is made to Figure 1 , Figure 3 and Figure 4 A flow guiding component is provided in the recessed part 31. The flow guiding component consists of two sets of spaced flow guiding plates 4. The heat dissipation hole 32 is located between the two sets of flow guiding plates 4. Several flow guiding components are provided and spaced along the circumference of the roller 3. The number of flow guiding components is the same as the number of heat dissipation holes 32. When the tension wheel is working, the roller 3 rotates synchronously with the belt, driving the two sets of flow guiding plates 4 to rotate at high speed. The flow guiding plates 4 generate directional airflow through rotation, which guides the external low-temperature air along the channel between the flow guiding plates 4 and precisely guides it to the heat dissipation hole 32 in the middle. When the airflow passes through the heat dissipation hole 32, it forms convection with the high-temperature air inside the roller 3, quickly carrying away the heat generated by friction, and realizing active convection heat dissipation.

[0039] The guide plate 4 has an arc-shaped end 41. Two adjacent sets of guide plates 4 face the same direction and form an air guiding area. When the roller rotates, the arc-shaped end 41 can reduce the vortex loss of air flow compared with the straight edge end, allowing the external air to enter the guiding area more smoothly. The guide plates 4 facing the same direction form a directional guiding channel, and the airflow is accelerated in the guiding area, thereby enhancing the convective heat transfer efficiency.

[0040] In one embodiment, reference is made to Figure 1 , Figure 4 and Figure 5The outer periphery of the roller component 3 is also provided with a groove 34, which is used to fill lubricating oil. The heat dissipation hole 32 is located between two adjacent sets of grooves 34. When the roller component 3 comes into contact with the belt, the lubricating oil filled in the groove 34 forms an oil film layer, which converts the dry friction between the belt and the roller into wet friction, significantly reducing the coefficient of friction. As the roller component 3 rotates, the lubricating oil in the groove 34 can be evenly distributed on the outer periphery of the roller component 3, continuously maintaining the lubrication effect and avoiding local dry friction and high temperature caused by lack of oil. At the same time, the positions of the groove 34 and the heat dissipation hole 32 are staggered to ensure unobstructed heat dissipation channels and avoid heat dissipation failure caused by oil accumulation.

[0041] In one embodiment, reference is made to Figure 1 , Figure 4 and Figure 5 The overflow hole 333 has inclined ends 3331 on both sides. With the cooperation of the inclined ends 3331, the diameter of the overflow hole 333 away from the through hole 331 is larger than the diameter of the overflow hole 333 on the side closer to the through hole 331. When lubricating oil is injected into the tension wheel, the excess grease will flow to the overflow hole 333. The flared structure of the inclined ends 3331 plays a guiding role to quickly guide the excess grease into the overflow hole 333. At the same time, the variable diameter design with a wider outer diameter and a narrower inner diameter uses the fluid pressure difference to accelerate the discharge of grease, avoid stagnation in the channel, and ensure the lubrication effect.

[0042] In one embodiment, reference is made to Figure 1 and Figure 2 The protruding part 11 has an opening, and a torsion spring 111 is installed inside the opening. One end of the torsion spring 111 is connected to the inner wall of the opening, and the other end is connected to the connecting base 2. When the belt is working, it will become loose due to wear and thermal expansion and contraction, which will cause the contact pressure between the tension wheel and the belt to decrease and slippage will easily occur. When the belt is loose, the elastic deformation of the torsion spring 111 will release the elastic force, drive the connecting base 2 to rotate, and make the roller 3 press against the belt, automatically compensate for the belt slack, and maintain a stable tension.

[0043] In one embodiment, reference is made to Figure 1 and Figure 2The convex shaft 121 has a threaded groove, and a screw 5 is threadedly connected to the threaded groove. The screw 5 has a pad 51. When the roller 3 is sleeved on the convex shaft 121 and connected to the screw 5, the pad 51 abuts against the receiving part 33. When the tensioning wheel rotates at high speed, if the roller is not axially positioned, it is easy to move left and right due to vibration, which will cause edge friction between the inner hole of the roller 3 and the mating surface of the convex shaft 121, thereby aggravating wear and generating additional heat. Therefore, the screw 5 is fixed to the convex shaft 121 by threaded connection. After the pad 51 abuts against the receiving part 33, it forms an axial limit, locking the roller 3 in a fixed axial position to prevent movement. Moreover, the self-locking property of the threaded connection can ensure that the pressure of the pad 51 is stable, and it will not loosen even in a high temperature and vibration environment, thus maintaining the positioning effect.

[0044] In the description of this application, 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. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0045] Those skilled in the art should understand that the above embodiments are merely for illustrative purposes and are not intended to limit the scope of this application. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of this application.

Claims

1. A high-temperature resistant tensioning wheel, comprising a support arm, one end of which has a protruding extension, a connecting base on the protruding extension, and a bearing plate at the other end of the support arm, the bearing plate having a protruding shaft, and a roller being sleeved on the protruding shaft, characterized in that: Both sides of the roller are provided with recesses, and the outer periphery of the roller is provided with heat dissipation holes. The heat dissipation holes are connected to the recesses, and several heat dissipation holes are provided and distributed at intervals along the circumference of the roller. The roller component also has a receiving portion, the receiving portion is provided with a through hole through which the convex shaft component passes, the receiving portion has a cavity, the cavity is provided with an overflow hole, one end of the overflow hole extends into the through hole, and several overflow holes are provided and are spaced apart along the circumferential direction of the receiving portion. The receiving part is provided with a liquid inlet on the side away from the bearing plate, and the liquid inlet is connected to the cavity.

2. The high temperature resistant idler wheel of claim 1, wherein: A flow guiding component is provided in the recessed portion. The flow guiding component consists of two sets of spaced-apart flow guiding plates, and the heat dissipation hole is located between the two sets of flow guiding plates. The flow guiding components are provided in several portions and are distributed at intervals along the circumference of the roller component. The number of flow guiding components is the same as the number of heat dissipation holes.

3. The high temperature resistant idler wheel of claim 1, wherein: The outer periphery of the roller component is also provided with a groove for filling with lubricating oil, and the heat dissipation hole is located between two adjacent sets of the groove.

4. The high temperature resistant idler wheel of claim 1, wherein: The overflow hole has inclined ends on both sides. With the cooperation of the inclined ends, the diameter of the overflow hole away from the through hole is larger than the diameter of the overflow hole on the side closer to the through hole.

5. The high temperature resistant idler wheel of claim 1, wherein: The protruding part has an opening, and a torsion spring is provided in the opening. One end of the torsion spring is connected to the inner wall of the opening, and the other end is connected to the connecting base.

6. The high temperature resistant idler wheel of claim 1, wherein: The convex shaft has a threaded groove, and a screw is threadedly connected to the threaded groove. The screw has a pad. When the roller is sleeved on the convex shaft and connected to the screw, the pad abuts against the receiving part.

7. The high-temperature resistant tensioning wheel according to claim 2, characterized in that: The air guide plate has an arc-shaped end, and two adjacent sets of air guide plates face the same direction and form an air guiding area.

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