Low noise synchronous pulley

Abstract

The utility model is suitable for mechanical drive field, provide a kind of low noise synchronous pulley, including: synchronous pulley body, the synchronous pulley body is along wheel body circumferential direction and is equipped with the tooth slot of engagement connection with synchronous belt, annular groove is equipped on the tooth slot along synchronous pulley body wheel body circumferential direction;Flange, fixed installation is in synchronous pulley body both sides, and it is evenly equipped with multiple through holes with annular groove intercommunication on it in annular form. The utility model is compressed air under the action of synchronous belt under the tooth slot arranged thereon is regularly when high speed rotates, and the annular groove of cooperation arrangement can effectively destroy original smooth airflow path, disrupt periodic vortex, and cooperation through hole provides pressure relief passage for compressed air, fundamentally weaken the pneumatic noise source, the design of its slot effectively reduces rotational inertia, and promotes air convection, while giving consideration to lightweight and improve heat dissipation, and its symmetrical uniform processing mode also ensures that dynamic balance is not destroyed.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical transmission, and in particular relates to a low-noise synchronous belt pulley. Background Technology

[0002] Synchronous belt drive is a highly efficient and precise power transmission method. It works by meshing the belt teeth with the pulley teeth to ensure a precise synchronous relationship between the driving pulley and the driven pulley, combining the advantages of belt drive, chain drive and gear drive.

[0003] Traditional synchronous pulleys are mostly solid structures, with only some pulleys having mounting parts such as mounting holes. They cannot form an effective airflow channel, and the smooth surface of the pulley without grooves prevents airflow from flowing effectively, resulting in significant noise at high speeds. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a low-noise synchronous pulley, which aims to solve the problem mentioned in the background art that traditional synchronous pulleys are prone to generating large noise at high speeds.

[0005] This utility model embodiment is implemented as follows: a low-noise synchronous pulley includes:

[0006] The synchronous belt pulley body has a toothed groove along the circumferential direction of the pulley body that meshes with the synchronous belt, and an annular groove is formed on the toothed groove along the circumferential direction of the pulley body.

[0007] The flange is fixedly installed on both sides of the synchronous pulley body, and has multiple through holes that are evenly distributed in a ring and communicate with the annular groove.

[0008] As a further embodiment of this utility model: a mounting hole is fixedly provided at the center position of the synchronous pulley body for connecting with an external drive device.

[0009] As a further embodiment of this utility model, a keyway is also fixedly provided in the mounting hole.

[0010] As a further embodiment of this utility model: the inner wall surfaces of the annular groove and the through hole, as well as the side surface of the flange that contacts the synchronous belt, are all provided with a solid lubricating coating.

[0011] As a further embodiment of this utility model: the synchronous pulley body is integrally cast in one piece, and the tooth profile of the tooth groove is precision ground.

[0012] The beneficial effects of this utility model are as follows:

[0013] This utility model provides a low-noise synchronous pulley. When rotating at high speed, the toothed grooves on it will regularly compress air under the action of the synchronous belt. The annular grooves can effectively disrupt the original smooth airflow path and disrupt the periodic vortex. The through holes provide a pressure relief channel for the compressed air, which fundamentally reduces the aerodynamic noise source. Its slotted design effectively reduces the moment of inertia and promotes air convection. At the same time, it takes into account the weight reduction and improved heat dissipation. Its symmetrical and uniform processing method also ensures that the dynamic balance is not destroyed. Attached Figure Description

[0014] Figure 1 A three-dimensional structural diagram of a low-noise synchronous belt pulley provided for an embodiment of this utility model;

[0015] Figure 2 A front view of a low-noise synchronous belt pulley provided for an embodiment of this utility model;

[0016] Figure 3 A cross-sectional view at point AA of a low-noise synchronous pulley provided for an embodiment of this utility model;

[0017] Figure 4 This is a cross-sectional schematic diagram of a low-noise synchronous pulley provided for an embodiment of the present utility model.

[0018] In the attached diagram: 1. Synchronous pulley body, 2. Mounting hole, 21. Keyway 2, 3. Flange, 4. Tooth groove, 5. Annular groove, 6. Through hole. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0021] Please see Figures 1 to 4 This utility model embodiment provides a low-noise synchronous pulley, comprising:

[0022] The synchronous belt pulley body 1 has a toothed groove 4 that meshes with the synchronous belt along the circumferential direction of the pulley body 1, and an annular groove 5 is formed on the toothed groove 4 along the circumferential direction of the pulley body 1.

[0023] Flange 3 is fixedly installed on both sides of the synchronous pulley body 1, and multiple through holes 6 connected to the annular groove 5 are evenly opened on it in a ring.

[0024] In this embodiment, when rotating at high speed, the toothed grooves 4 on it will regularly compress the air under the action of the synchronous belt. The annular grooves 5 can effectively disrupt the original smooth airflow path and disrupt the periodic vortex. The through holes 6 provide a pressure relief channel for the compressed air, which fundamentally reduces the aerodynamic noise source. Its slotted design effectively reduces the moment of inertia and promotes air convection. At the same time, it takes into account both weight reduction and improved heat dissipation. Its symmetrical and uniform processing method also ensures that the dynamic balance is not disrupted.

[0025] In one embodiment, the axes of the multiple through holes 6 on the flange 3 can be set to be tilted at a set angle relative to the radial direction of the synchronous pulley body 1, thereby forming a vortex that guides the airflow to be discharged outward when the synchronous pulley body 1 rotates, enhancing the heat dissipation effect, and effectively centrifugally throwing out intruding dust, debris and other foreign objects, achieving self-cleaning, thereby maintaining long-term noise reduction performance and system reliability.

[0026] Please see Figures 1 to 4 In a preferred embodiment of this utility model, the synchronous pulley body 1 has a mounting hole 2 fixedly opened at the center position for connecting with an external drive device.

[0027] Furthermore, a keyway 21 is fixedly provided inside the mounting hole 2.

[0028] In practical applications, this embodiment facilitates the connection of the drive shaft or output shaft end through the fixed mounting hole 2. With the keyway 21, a key can be installed inside to ensure that power is accurately and reliably transmitted from the shaft to the synchronous pulley and synchronous belt during rotation.

[0029] Please see Figure 2 and Figure 4 In another preferred embodiment of this utility model, the inner wall surfaces of the annular groove 5 and the through hole 6, as well as the side surface of the flange 3 that contacts the synchronous belt, are all provided with a solid lubricating coating.

[0030] In practical applications, the lubricating coating provided in this embodiment can significantly reduce the coefficient of friction between the sidewall of the synchronous belt and the retaining ring flange 3, thereby reducing frictional vibration and noise at the source. At the same time, the lubricating coating on the surface of the annular groove 5 and the through hole 6 can further reduce the friction between the airflow and the hole wall, thereby suppressing temperature rise and extending the service life of the synchronous belt.

[0031] In one embodiment, the lubricating coating may be made of Teflon, molybdenum disulfide, or graphite.

[0032] Please see Figure 2 and Figure 4In another preferred embodiment of this utility model, the synchronous pulley body 1 is integrally cast in one piece, and the tooth profile of the tooth groove 4 is precision ground.

[0033] In practical applications, this embodiment ensures structural uniformity through one-time casting, while the precision grinding of the tooth groove 4 guarantees meshing accuracy and dynamic balance, further reducing vibration and impact noise.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A low noise synchronous pulley characterized by: include: Synchronous pulley body (1), the synchronous pulley body (1) has a toothed groove (4) that meshes with the synchronous belt along the circumferential direction of the pulley body, and an annular groove (5) is formed on the toothed groove (4) along the circumferential direction of the pulley body (1). The flange (3) is fixedly installed on both sides of the synchronous pulley body (1), and multiple through holes (6) connected to the annular groove (5) are evenly opened on it in a ring.

2. A low noise pulley as claimed in claim 1, wherein: The synchronous pulley body (1) has a fixed mounting hole (2) at its center position for connecting to an external drive device.

3. A low noise pulley as claimed in claim 2, wherein: A keyway (21) is also fixedly provided inside the mounting hole (2).

4. A low noise pulley as claimed in claim 1, wherein: The inner wall surfaces of the annular groove (5) and the through hole (6), as well as the side surface of the flange (3) that contacts the synchronous belt, are all provided with a solid lubricating coating.

5. A low noise pulley as claimed in claim 1, wherein: The synchronous pulley body (1) is integrally cast in one piece, and the tooth profile of its circumferential tooth groove (4) is precision ground.

Images