CN215596324U

CN215596324U - Belt tightening and anti-vibration device

Info

Publication number: CN215596324U
Application number: CN202121816274.XU
Authority: CN
Inventors: 王福山
Original assignee: Shandong Information Industry Service Co ltd
Current assignee: Shandong Information Industry Service Co ltd
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2022-01-21
Anticipated expiration: 2031-08-05

Abstract

The utility model discloses a belt tight edge vibration eliminating device, which is used for eliminating vibration of a tight edge of a belt and comprises: a frame body; the upper pressing wheel is arranged on the frame body through an upper pressing wheel shaft and is jointed with the upper surface of the tight edge; the lower pressing wheel is arranged on the frame body through a lower pressing wheel shaft and is jointed with the lower surface of the tight edge. The belt tight edge vibration eliminating device based on the utility model can reduce the belt tight edge vibration and standing wave.

Description

Belt tightening and anti-vibration device

Technical Field

The utility model relates to a belt tight edge vibration eliminating device for belt vibration elimination.

Background

A belt drive is one of the most common drive mechanisms, which enables a long distance drive, but the drive efficiency is relatively low. Specifically, in the transmission process, because the acting force of the driving belt wheel and the driven belt wheel on the belt is different, the elongation rates generated by different sections of the belt ring of the belt are different, and the belt can generate elastic sliding in the transmission process. The elastic sliding is more pronounced when the driving pulley and the driven pulley are far apart. In the process of belt transmission, a longer section of the belt is suspended no matter the loose edge or the tight edge of the belt. When the suspended part is too long, the belt can vibrate or even form standing waves due to stretching and elastic sliding in the running process. Such vibration or standing waves can promote elongation and aged failure of the belt, further enhancing elastic slip and even belt stripping.

In view of this, in a belt drive mechanism, generation of vibration and standing waves is often mitigated by adapting a tensioner or the like. In an environment with an automatic tensioner, the tensioner is usually loose on one side, and the loose edge of the belt is divided into two shorter sections by the intervention of the tensioner, so that the vibration amplitude of the belt and the formation of standing waves are limited. However, for tight-edge applications, in order to avoid additional mechanical intervention and increase transmission losses, tensioners and the like are generally provided, and the longer belt length is more favorable for vibration enhancement and generation of standing waves.

In some implementations, the tight side and the loose side are simultaneously tensioned in a manner of controlling the center distance between the driving pulley and the driven pulley. Specifically, one belt wheel adopts a moving mode, the belt wheel is installed on a frame by adopting a guide structure, and one side of the belt wheel, which is opposite to the other belt wheel, is provided with a tensioning device to generate a force far away from the other belt wheel. The tensioning mode cannot change the essential characteristic of larger span of the two pulleys, and the mode depends on larger pulling force at two ends to perform straightening, so that the damage to the belt is relatively larger.

In particular, chinese patent document CN1474076A discloses a belt tensioning method in which one pulley is mounted on a frame and the other pulley is mounted on a seat frame, which is a pendulum frame. In this patent document, the above-mentioned problem is bound to occur in the case of a belt stretched by a rocker. Meanwhile, the swing frame can generate position change between the two belt wheels due to different belt elongation, and the change is not only reflected on the center distance, but also reflected on the height difference between the two belt wheels, so that the overall layout is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a belt tight edge vibration eliminating device capable of reducing belt tight edge vibration and standing wave.

In an embodiment of the present invention, there is provided a belt tight edge shivering apparatus for shivering a tight edge of a belt, including:

a frame body;

the upper pressing wheel is arranged on the frame body through an upper pressing wheel shaft and is jointed with the upper surface of the tight edge;

the lower pressing wheel is arranged on the frame body through a lower pressing wheel shaft and is jointed with the lower surface of the tight edge.

Optionally, the upper and lower rollers are offset in the direction of the expansion of the welt.

Optionally, the number of the upper pinch rollers is different from that of the lower pinch rollers, and the number difference is 1;

the upper pinch rollers are alternately arranged in the direction of the expansion of the tight edge.

Optionally, the pre-pressure of the upper press wheel on the upper surface of the tight edge is 0.

Optionally, the frame body has a cushioning portion to respond to the jerking of the tight side.

Optionally, the cushioning portion is an elastic damper.

Optionally, the elastic damper is a leaf spring.

In the embodiment of the utility model, the upper pinch roller and the lower pinch roller are correspondingly arranged on the upper belt surface side and the lower belt surface side of the tight edge of the belt, which is equivalent to limiting the tight edge of the belt, or providing a plurality of fulcrums for the suspended tight edge of the belt, so that the tight edge of the belt is changed into a plurality of sections, and each section of suspended part is shortened, thereby inhibiting vibration and standing wave and reducing the vibration of the tight edge of the belt.

Drawings

Fig. 1 is a schematic structural diagram of a belt tight edge vibration eliminating device in one embodiment.

In the figure: 1. elastic damper, 2, upper pinch roller, 3, tight edge, 4, frame body, 5, lower pinch roller.

Detailed Description

Since the principle of the present invention is relatively clear, the following description will be made only by taking the structure for the belt tight-edge shivering apparatus shown in fig. 1 as an example.

It is noted that the sagging of the tight side of the belt is not significant relative to the significant sagging of the loose side of the belt, but that a small amount of sagging produces a fluctuation in the belt loops, i.e., chatter, during belt driving.

In the embodiment of the utility model, the mode of providing the additional fulcrum is adopted to reduce the tremble generated by overlong tight edge of the belt, thereby prolonging the service life of the belt and reducing the noise.

It will be appreciated that upper pinch roller 2 and lower pinch roller 5, as shown in figure 1, necessarily have the ability to rotate, otherwise represented as a support rather than a wheel.

The belt tight edge shiver device shown in fig. 1 is applied to the tight edge 3 of a particular belt. The upper pressure wheel 2 and the lower pressure wheel 5 necessarily require a support, i.e. a frame 4, which frame 4 can be mounted on a wheel carrier or on the body of the machine to which the pulley mechanism is attached.

The frame body 4 is used for assembling the wheel body, and according to the general knowledge of mechanical principle, it should have the general structure of wheel body assembly, and will not be described again.

Specifically, regarding the upper pinch roller 2, it is installed on support body 4 through the upper pinch roller axle, and the upper pinch roller axle can adopt integrative structure with upper pinch roller 2, then installs on support body 4 through the bearing, perhaps passes through the bearing assembly between upper pinch roller 2 and the upper pinch roller axle, and the upper pinch roller axle is then fixed on support body 4.

Furthermore, the engagement of upper puck 2 with the upper surface of welt 3 does not necessarily represent a contact force, as will be appreciated by those skilled in the art.

In the preferred embodiment, the upper press wheel 2 engages exactly with the upper surface of the grip edge 3, or the pre-pressure between the upper surface of the grip edge 3 and the upper press wheel 2 is exactly 0.

The arrangement of the lower press wheel 5 is slightly different from that of the upper press wheel 2, and even if the tight edge 3 of the belt has visible or invisible sag due to natural deflection, and for the arrangement of the lower press wheel 5, the lower press wheel 5 is tangent to the tight edge 3 in an ideal state, namely an ideal straight state, as far as possible. It is thus found that it is desirable to determine the layout reference of the lower pinch roller 5, and since the clinch 3 has a natural sag, in other words, the lower pinch roller 5 is engaged with the lower surface of the clinch 3, and a substantial contact force is generated. But otherwise substantially conforms to the layout of upper puck 2.

In contrast, the upper press wheel 2 can also be designed to have the upper surface of the grip edge 3 in an ideal state as a design position so that the upper press wheel 2 is exactly engaged with the upper surface of the grip edge 3 in the ideal state.

In the structure shown in fig. 1, the upper pinch roller 2 and the lower pinch roller 5 are sequentially arranged at intervals in the direction in which the welt 3 extends, and are arranged with reference to the extending direction of the welt 3 regardless of the up and down. The addition conditions include upper and lower conditions, which are the conditions lost in FIG. 1.

In the preferred embodiment, the number of the upper pressing wheels 2 is different from that of the lower pressing wheels 5, and the number difference is 1, so that the common requirement of interval arrangement is met.

The position of upper pinch roller 2 and lower pinch roller 5 may be static, while in some embodiments, the position of upper pinch roller 2 and lower pinch roller 5 may have a floating space based on cushioning. The buffer device comprises a buffer part marked as a frame body 4 on the frame body 4, when the tight edge 3 generates vibration, the generated vibration acts on the upper pressing wheel 2 and the lower pressing wheel 5 in the form of mechanical waves, the rigid part transmits the mechanical waves relatively well, and the attenuation of the mechanical waves is relatively slow. The presence of the buffer portion effectively suppresses mechanical waves, thereby reducing the influence of chattering.

As for the buffer device, there are relatively many buffer devices available in the mechanical field, and even include, for example, a sponge, a cushion block made of rubber. While some damping devices are assembly structures, such as spring mounts, for example, gas springs may also be used in some applications.

In some embodiments, the damping device is made of a leaf spring, which has a certain rigidity and is easy to construct a support mounting seat, for example, a bearing seat is constructed on the leaf spring for mounting, for example, the upper pinch roller 2.

Claims

1. A tight limit shiver device of belt for shiver of the tight limit of belt, its characterized in that includes:

a frame body;

2. A belt lace oscillation device as claimed in claim 1, characterized in that the upper and lower pressure rollers are offset in the direction of the lace extension.

3. The belt tight edge shiver device as claimed in claim 2, wherein the number of the upper press wheels is different from that of the lower press wheels, and the difference in the number is 1;

4. A belt tight edge shiver device as claimed in any one of claims 1 to 3, wherein the pre-pressure of the upper pressing wheel on the upper surface of the tight edge is 0.

5. The belt tight edge shiver device as claimed in claim 1, wherein said frame body has a buffer portion to respond to the vibration of the tight edge.

6. The belt tight edge debouncing device of claim 5, wherein the cushioning portion is an elastic damper.

7. The belt tight edge shiver device of claim 6, wherein said elastic damper is a plate spring.