Dustproof automatic tensioning wheel

Abstract

The utility model relates to the technical field of tensioning wheels, in particular to a dustproof type automatic tensioning wheel which comprises a tensioning wheel body, a belt pulley, a dustproof cover and a bolt, arc-shaped installation cylinders are symmetrically arranged on the outer side of the belt pulley, dustproof strips are fixedly connected to the outer sides of the arc-shaped installation cylinders in a staggered mode, and the dustproof strips are arranged on the outer side of the belt pulley. The arc-shaped mounting barrel is arranged on the outer side of the base, the dust-proof strips are arranged on the outer side of the arc-shaped mounting barrel, and symmetrically-arranged mounting grooves are formed in the inner side of the arc-shaped mounting barrel, and the dust-proof strips are arranged on the outer side of the symmetrically-arranged arc-shaped mounting barrel through the structure composed of the arc-shaped mounting barrel, the dust-proof strips, the mounting grooves, the wear-resistant plastic V-shaped dust-proof rings and the like. The V-shaped dust-proof ring has the advantages that fluid is difficult to leak due to resistance generated by throttling of a zigzag gap, the self-sealing purpose is achieved, external dust is difficult to enter the V-shaped dust-proof ring, dust prevention is achieved, and the wear-resistant plastic V-shaped dust-proof ring mounted through the mounting groove can be prevented from being adhered and damaged when the V-shaped dust-proof ring leaves a factory and is painted due to the special shape of the wear-resistant plastic V-shaped dust-proof ring.

Description

Technical Field

[0001] The utility model relates to the technical field of tension pulleys, in particular to a dust-proof automatic tension pulley. Background Technique

[0002] A tension pulley is a follower pulley that presses on a belt to change the wrap angle of the pulley or control the tension of the belt. It is a tensioning device for belt drives. When the center distance of the belt cannot be adjusted, an automatic tension pulley can be used to tension the belt.

[0003] If the automatic tension pulley is not dust-proofed, dust is likely to enter the inside of the automatic tension pulley, and the accumulation of dust will have a certain impact on the use of the tension pulley and affect its working performance. Therefore, in view of the above problems, a dust-proof automatic tension pulley is proposed. Content of the Utility Model

[0004] The purpose of the utility model is to provide a dust-proof automatic tension pulley to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A dust-proof automatic tension pulley includes a tension pulley body, a belt pulley, a dust-proof cover and bolts. Symmetrically arranged arc-shaped mounting cylinders are provided on the outer side of the belt pulley. Dust-proof strips arranged in a staggered manner are fixedly connected to the outer side of the arc-shaped mounting cylinders. Symmetrically arranged mounting grooves are opened on the inner side of the arc-shaped mounting cylinders. Wear-resistant plastic V-shaped dust-proof rings are fixedly connected to the inner side of the mounting grooves. First screw holes with equal hole diameters are opened on the inner side of the arc-shaped mounting cylinders, and a number of second screw holes with equal hole diameters are opened on the inner side of the belt pulley.

[0007] Preferably, the first screw holes and the second screw holes are arranged in one-to-one correspondence, and the hole diameters of the first screw holes are equal to the hole diameters of the second screw holes.

[0008] Preferably, a number of arc-shaped grooves with equal groove diameters are opened on the inner side of the arc-shaped mounting cylinders, and rubber balls are fixedly connected to the inner side of the arc-shaped grooves. The rubber balls are in contact with the belt pulley.

[0009] Preferably, a semi-circular arc groove is opened on the inner side of the arc-shaped mounting cylinder, and elastic arc balls are fixedly connected to the inner side of the semi-circular arc groove. The elastic arc balls are in contact with the belt pulley, and adjacent elastic arc balls are in contact with each other.

[0010] Preferably, the wear-resistant plastic V-shaped dust-proof rings are symmetrically arranged and are in contact with the belt pulley.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] In the present utility model, a structure composed of an arc-shaped mounting cylinder, a dust-proof strip, a mounting groove, a wear-resistant plastic V-shaped dust-proof ring, etc. is provided. On the outer side of the symmetrically arranged arc-shaped mounting cylinders, staggered dust-proof strips are arranged. The combined staggered dust-proof strips are arranged in a maze. By using the throttling of the tortuous gap to generate resistance, it is difficult for the fluid to leak, achieving the purpose of self-sealing. At the same time, external dust is also difficult to enter, thus achieving dust-proofing. And the wear-resistant plastic V-shaped dust-proof ring installed through the mounting groove can avoid the bonding damage of the plastic dust-proof ring caused by factory painting due to its special shape. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0014] Figure 2 is a schematic diagram of the mounting structure at the arc-shaped mounting cylinder of the present utility model;

[0015] Figure 3 is of the present utility model Figure 2 schematic diagram of the structure at A;

[0016] Figure 4 is a schematic diagram of the dust-proof strip mounting structure of the present utility model;

[0017] Figure 5 is a schematic diagram of the structure at the wear-resistant plastic V-shaped dust-proof ring of the present utility model;

[0018] Figure 6 is a schematic diagram of the rubber ball mounting structure of the present utility model.

[0019] In the figure: 1. Tension pulley body; 2. Belt pulley; 3. Dust-proof cover; 4. Arc-shaped mounting cylinder; 5. Dust-proof strip; 6. Mounting groove; 7. Wear-resistant plastic V-shaped dust-proof ring; 8. Arc-shaped groove; 9. Semi-arc groove; 10. Elastic arc ball; 11. Rubber ball; 12. First screw hole; 13. Second screw hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0022] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Without contrary instructions, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus cannot be construed as limiting the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0024] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper", etc. can be used here to describe the spatial positional relationship of a device or feature shown in the figure with other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the figure of the device. For example, if the device in the attached drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations are made for the spatial relative descriptions used here.

[0025] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present utility model.

[0026] Please refer to Figures 1-6 , the present utility model provides a technical solution:

[0027] A dust-proof automatic tensioning pulley, comprising a tensioning pulley body 1, a belt pulley 2, a dust cover 3 and bolts. On the outer side of the belt pulley 2, symmetrically arranged arc-shaped mounting cylinders 4 are provided. On the outer side of the arc-shaped mounting cylinders 4, staggeredly arranged dust-proof strips 5 are fixedly connected. On the inner side of the arc-shaped mounting cylinders 4, symmetrically arranged mounting grooves 6 are opened. On the inner side of the mounting grooves 6, wear-resistant plastic V-shaped dust-proof rings 7 are fixedly connected. On the inner side of the arc-shaped mounting cylinders 4, first screw holes 12 with equal aperture sizes are opened. On the inner side of the belt pulley 2, a plurality of second screw holes 13 with equal aperture sizes are opened.

[0028] The first screw holes 12 and the second screw holes 13 are arranged in one-to-one correspondence, and the aperture sizes of the first screw holes 12 are equal to those of the second screw holes 13. This arrangement enables the bolts to penetrate through the first screw holes 12 and the second screw holes 13 simultaneously, thereby fixing the arc-shaped mounting cylinder 4 on the outer side of the pulley 2; a number of arc-shaped grooves 8 with equal groove diameters are formed on the inner side of the arc-shaped mounting cylinder 4, and rubber balls 11 are fixedly connected to the inner sides of the arc-shaped grooves 8. The rubber balls 11 are in contact with the pulley 2. This arrangement enables the installation of the rubber balls 11, making the connection between the arc-shaped mounting cylinder 4 and the pulley 2 a flexible connection; a semi-circular arc groove 9 is formed on the inner side of the arc-shaped mounting cylinder 4, and elastic arc-shaped balls 10 are fixedly connected to the inner side of the semi-circular arc groove 9. The elastic arc-shaped balls 10 are in contact with the pulley 2, and adjacent elastic arc-shaped balls 10 are in contact with each other. This arrangement enables the installation of the elastic arc-shaped balls 10, making the connection between the arc-shaped mounting cylinder 4 and the pulley 2 a flexible connection; the wear-resistant plastic V-shaped dust-proof rings 7 are arranged symmetrically and are in contact with the pulley 2. This arrangement enables the wear-resistant plastic V-shaped dust-proof rings 7 installed through the installation grooves 6 to avoid the situation of bonding damage to the plastic dust-proof rings during factory painting due to their special shape.

[0029] Workflow: When it is necessary to use the dust-proof automatic tensioning pulley to control the tension of the belt, the tensioning pulley body 1 is installed on the device, the dust-proof cover 3 is installed together with the pulley 2, and the pulley 2 is brought into contact with the belt. There may be dust floating in the environment where the pulley 2 is used. Align the first screw holes 12 of the arc-shaped mounting cylinder 4 with the second screw holes 13 of the pulley 2, and then penetrate bolts through the first screw holes 12 and the second screw holes 13 to fix the arc-shaped mounting cylinder 4 on the outer side of the pulley 2. On the outer sides of the symmetrically arranged arc-shaped mounting cylinders 4, there are staggered dust-proof strips 5. The combined staggered dust-proof strips 5 form a labyrinth setting. By using the throttling of the tortuous gaps to generate resistance, it is difficult for the fluid to leak, achieving the self-sealing purpose, thereby performing dust prevention. The wear-resistant plastic V-shaped dust-proof rings 7 installed through the installation grooves 6 can avoid the situation of bonding damage to the plastic dust-proof rings during factory painting due to their special shape. The rubber balls 11 installed through the arc-shaped grooves 8 and the elastic arc-shaped balls 10 installed through the semi-circular arc grooves 9 are both in contact with the pulley 2, making the connection between the arc-shaped mounting cylinder 4 and the pulley 2 a flexible connection, providing a certain degree of protection for the pulley 2 and the arc-shaped mounting cylinder 4.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dustproof automatic tensioner, comprising a tensioner body (1), a pulley (2), a dustproof cover (3) and a bolt, characterized in that: The outer side of the pulley (2) is provided with a symmetrically arranged arc-shaped mounting cylinder (4), the outer side of the arc-shaped mounting cylinder (4) is fixedly connected with a staggered dust strip (5), the inner side of the arc-shaped mounting cylinder (4) is provided with a symmetrically arranged mounting groove (6), the inner side of the mounting groove (6) is fixedly connected with a wear-resistant plastic V-shaped dust ring (7), the inner side of the arc-shaped mounting cylinder (4) is provided with a first screw hole (12) of equal diameter, and the inner side of the pulley (2) is provided with a plurality of second screw holes (13) of equal diameter.

2. The dustproof automatic tensioner according to claim 1, characterized in that: The first screw hole (12) and the second screw hole (13) are arranged in a one-to-one correspondence, and the diameter of the first screw hole (12) is equal to the diameter of the second screw hole (13).

3. The dustproof automatic tensioner according to claim 1, characterized in that: A plurality of arc-shaped grooves (8) with equal groove diameters are provided on the inner side of the arc-shaped installation cylinder (4), a rubber ball (11) is fixedly connected to the inner side of the arc-shaped groove (8), and the rubber ball (11) fits the pulley (2).

4. The dustproof automatic tensioner according to claim 1, characterized in that: A semi-arc groove (9) is provided on the inner side of the arc-shaped installation cylinder (4), and an elastic arc-shaped ball (10) is fixedly connected to the inner side of the semi-arc groove (9). The elastic arc-shaped ball (10) fits with the pulley (2), and adjacent elastic arc-shaped balls (10) fit with each other.

5. The dustproof automatic tensioner according to claim 1, characterized in that: The wear-resistant plastic V-shaped dustproof ring (7) is symmetrically arranged, and the wear-resistant plastic V-shaped dustproof ring (7) is in close contact with the pulley (2).

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