CN204267671U - A kind of synchronous belt wheel - Google Patents

Abstract

The utility model relates to a kind of synchronous belt wheel, the gear teeth are had at the outer surface of belt pulley, outer surface along whole belt pulley in the middle of the gear teeth of belt pulley is provided with an annular groove, the gear teeth of belt pulley are divided into first round teeth portion and second to take turns teeth portion by annular groove, between the gear teeth of first round teeth portion, tooth pitch is P, gear teeth bearing of trend and the belt pulley axle center line of first round teeth portion form angle a, between second gear teeth of taking turns teeth portion, tooth pitch is P ', and second takes turns the gear teeth bearing of trend of teeth portion and belt pulley axle center line, and to form angle be a '.The noise that the synchronous belt wheel that the utility model proposes produces when can reduce transmission.

Description

A synchronous drive pulley

technical field

The utility model relates to a pulley, in particular to a synchronous drive pulley.

Background technique

The synchronous drive pulley transmission is composed of a closed ring-shaped synchronous belt with equal pitch teeth on the inner peripheral surface and the corresponding pulley. As shown in FIG. 3 , a synchronous belt 8 is put on the periphery of the two pulleys 7 . When the whole device is in operation, the teeth of the synchronous belt 8 mesh with the tooth grooves of the pulley 7 to transmit power, and this mode of operation belongs to meshing transmission. Simultaneously, in order to prevent the synchronous belt 8 from moving axially or slipping out of the pulley 7 during the transmission process, ribs 9 are generally added on both sides of the pulley 7 to improve the reliability of the whole device operation.

In the traditional synchronous drive belt pulley transmission method, when the teeth of the synchronous belt mesh with the tooth grooves of the pulley, the air in the tooth grooves of the pulley is suddenly squeezed, forcing the air to be discharged from the tooth grooves of the pulley. Force, will make a sound, resulting in greater noise pollution. When the high speed is reached, that is, when the speed is 10000rpnm/min to 15000rpnm/min, the generated noise is more obvious. The analysis of the noise spectrum generated by the synchronous drive pulley shows that the generation of noise is related to the meshing frequency with the cogging and the harmonic frequency of the meshing frequency. At the same time, the impact force generated instantaneously when the teeth of the synchronous belt mesh with the tooth grooves of the pulley has a relatively large impact rigidity, which greatly reduces the service life of the synchronous belt and the pulley.

Utility model content

The technical problem to be solved by the utility model is to provide a synchronous drive pulley that reduces noise generated during transmission of the synchronous drive pulley.

In order to solve the above problems, the utility model proposes a synchronous drive belt pulley. There are gear teeth on the outer peripheral surface of the belt pulley, and an annular groove is arranged along the outer peripheral surface of the entire belt pulley in the middle of the teeth of the belt pulley. The annular groove connects the gear teeth of the belt pulley It is divided into the first gear part and the second gear part. The pitch between the teeth of the first gear part is P, and the extension direction of the teeth of the first gear part forms an angle a with the axis line of the pulley. The pitch between the teeth of the gear teeth is P', and the angle formed between the extension direction of the teeth of the second gear teeth and the axis line of the belt pulley is a'.

According to an embodiment of the present invention, the groove width of the annular groove is greater than 0.5mm and less than one-third of the width of the outer peripheral surface of the pulley.

According to an embodiment of the present invention, the groove depth of the annular groove is less than 50mm.

According to an embodiment of the present invention, the inter-tooth pitch P of the first gear tooth portion is equal to the inter-gear pitch P' of the second gear tooth portion.

According to an embodiment of the present invention, the angle value of the included angle a is the same as the angle value of the included angle a', and the gear extension direction of the first gear part is different from the gear extension direction of the second gear tooth part.

According to an embodiment of the present invention, the gear teeth of the first gear tooth portion and the gear teeth of the second gear tooth portion are staggered on both sides of the annular groove.

According to an embodiment of the present invention, the gear teeth of the first gear tooth portion and the gear teeth of the second gear tooth portion are arranged symmetrically on both sides of the annular groove.

In the utility model, an annular groove with sound-absorbing effect is arranged in the middle part of the outer peripheral tooth surface of the pulley, which effectively alleviates the impact force generated instantaneously when the synchronous drive pulley meshes with the tooth grooves during high-speed transmission, and reduces the work during transmission. Noise, thereby improving the service life of timing belt and pulley.

Description of drawings

Fig. 1 is the structural representation of belt pulley of the present utility model.

Fig. 2 is a structural schematic diagram of the outer peripheral surface of the pulley of the utility model.

Fig. 3 is a diagram of the use state of the pulley in the prior art.

Detailed ways

In order to further understand the utility model, the specific implementation will be described in detail below in conjunction with the accompanying drawings.

Fig. 1 is the structural representation of belt pulley of the present utility model. As shown in Figure 1, there are gear teeth 6 on the outer peripheral surface of the pulley 7, and an annular groove 5 is arranged along the outer peripheral surface of the entire pulley 7 in the middle of the outer peripheral surface of the pulley 7, and the annular groove 5 divides the teeth of the pulley into The first gear tooth portion 61 and the second gear tooth portion 62 . The pitch between the teeth of the first wheel tooth portion 61 is P, and the pitch between the teeth of the second wheel tooth portion is P’, and the pitch here refers to the pitch of two adjacent teeth on the pitch circle. The extension direction of the teeth of the first gear part forms an included angle a with the axis of the pulley, and the extension direction of the teeth of the second gear part forms an angle a' with the axis of the pulley.

Preferably, the groove width of the annular groove is greater than 0.5 mm and less than one third of the width of the outer peripheral surface of the pulley.

Preferably, the groove depth of the annular groove is less than 50mm. By designing the annular groove 5 in this way, a better noise reduction effect can be obtained.

Preferably, the inter-gear pitch P of the first gear tooth portion 61 is equal to the inter-gear pitch P’ of the second gear tooth portion 62.

Furthermore, the gear teeth of the first gear tooth portion 61 and the gear teeth of the second gear tooth portion 62 are staggered on both sides of the annular groove. As shown in FIG. 2 , the gear teeth of the first gear tooth portion 61 and the gear teeth of the second gear tooth portion 62 are staggered up and down by an angle on both sides of the annular groove 5 . According to another option of the embodiment of the present utility model, the angle value of the angle a is the same as the angle value of the angle a', and the gear extension direction of the first gear part 61 is different from the gear extension direction of the second gear tooth part 62, for better engagement.

Although FIG. 1 and FIG. 2 show that the gear teeth of the first gear tooth portion 61 and the gear teeth of the second gear tooth portion 62 are staggered from each other on both sides of the annular groove, it can be understood that another implementation not shown in the figures In the example, the gear teeth of the first gear tooth portion and the gear teeth of the second gear tooth portion can also be arranged symmetrically on both sides of the annular groove, that is, the gear teeth of the first gear tooth portion and the gear teeth of the second gear tooth portion The two sides of the annular groove are aligned one by one, and there is no mutual staggered angle.

In the utility model, an annular groove with sound-absorbing effect is arranged in the middle part of the outer peripheral tooth surface of the pulley, so that the transmission device can be made lighter and quieter, and the transmission efficiency and performance are the highest. In the case of high speed (10000rpnm/min-15000rpnm/min), the noise and vibration are reduced by 10 decibels compared with ordinary pulleys. The utility model is widely applicable to automobiles, textiles, printing and packaging equipment, sewing equipment, office equipment, laser engraving equipment, tobacco, financial equipment, stage lighting, communication food machinery, medical machinery, iron and steel machinery, petrochemical, instrumentation, various Various technical fields such as precision machine tools.

The embodiments of the utility model have been described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above embodiments. Although the utility model is disclosed as above with preferred embodiments, it is not used to limit the utility model, and any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the utility model. Therefore the protection scope of the present utility model should be as the criterion with the scope defined by the claims of the present utility model.

Claims (7)

1. a synchronous belt wheel, it is characterized in that, the outer surface of described belt pulley has the gear teeth, outer surface along whole belt pulley in the middle of the gear teeth of described belt pulley is provided with an annular groove, the gear teeth of described belt pulley are divided into first round teeth portion and second to take turns teeth portion by described annular groove, between the gear teeth of described first round teeth portion, tooth pitch is P, gear teeth bearing of trend and the described belt pulley axle center line of described first round teeth portion form angle a, between described second gear teeth of taking turns teeth portion, tooth pitch is P ', described second takes turns the gear teeth bearing of trend of teeth portion and described belt pulley axle center line forms angle a '.

2. a kind of synchronous belt wheel as claimed in claim 1, it is characterized in that, the groove width of described annular groove is greater than 0.5mm, and is less than 1/3rd of the outer surface width of described belt pulley.

3. a kind of synchronous belt wheel as claimed in claim 1, it is characterized in that, the groove depth of described annular groove is less than 50mm.

4. a kind of synchronous belt wheel as claimed in claim 1, is characterized in that, between the gear teeth that between the gear teeth of described first round teeth portion, tooth pitch P and described second takes turns teeth portion, tooth pitch P ' is equal.

5. a kind of synchronous belt wheel as claimed in claim 4, it is characterized in that, the angle value of described angle a is identical with the angle value of described angle a ', and the gear bearing of trend that the gear bearing of trend of described first gear part and described second takes turns teeth portion is different.

6. a kind of synchronous belt wheel as claimed in claim 4, it is characterized in that, the gear teeth and described second gear teeth of taking turns teeth portion of described first round teeth portion stagger mutually in the both sides of described annular groove.

7. a kind of synchronous belt wheel as claimed in claim 4, it is characterized in that, the gear teeth that the gear teeth of described first round teeth portion and described second take turns teeth portion are arranged in the bilateral symmetry of described annular groove.