Automatic tensioning wheel

Abstract

The utility model relates to the technical field of automatic tensioning wheels, in particular to an automatic tensioning wheel which comprises a tensioning wheel body used for tensioning a belt, the tensioning wheel body comprises a base, double torsion springs, tensioning wheel arms, a belt wheel and a shaft sleeve, the tensioning wheel arms are arranged in front of the base, and the two sides of the base are arranged in a protruding mode. A double-torsion spring is arranged between the base and the tensioning wheel arm, a belt wheel is rotationally connected to one side of the tensioning wheel arm, a shaft sleeve penetrates through the middle of the belt wheel, the heat dissipation assembly comprises through holes and a heat conduction rod, and the through holes with the L-shaped sections are formed in the belt wheel. According to the tensioning wheel, the tensioning wheel body can meet the higher torque requirement through the double torsional springs arranged on the tensioning wheel body, the heat dissipation assembly arranged in the belt wheel has the heat dissipation effect in the using process, the dustproof assembly is arranged, the heat dissipation effect is good, the heat dissipation effect is good, and the service life of the tensioning wheel is prolonged. And a dustproof function is realized during heat dissipation.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic tensioning wheels, and specifically relates to an automatic tensioning wheel. Background Technique

[0002] A tensioning wheel is a follower wheel that presses on the belt to change the wrap angle of the pulley or control the belt tension. It is a tensioning device for belt drives. When installed, the belt must be in a tensioned state. An automatic tensioning wheel usually consists of components such as a torsion spring, bearings, and a pulley.

[0003] Since the outer side of the pulley of the automatic tensioning wheel is attached to the belt, heat is generated by the friction between the belt and the pulley. If it is not dissipated in time, it will affect the rotation of the pulley and reduce its lifespan. Therefore, an automatic tensioning wheel is proposed to address the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to provide an automatic tensioning wheel to solve the problem of inconvenient heat dissipation when the pulley is in use.

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

[0006] An automatic tensioning wheel includes a tensioning wheel main body for tensioning the belt. The tensioning wheel main body includes a base, a double torsion spring, tensioning wheel arms, a pulley, and a bushing. Tensioning wheel arms are provided in front of the base with protruding sides on both sides. A double torsion spring is provided between the base and the tensioning wheel arms. A pulley is rotatably connected to one side of the tensioning wheel arm. A bushing passes through the middle of the pulley. A heat dissipation component is provided inside the pulley. The heat dissipation component includes through holes and heat conducting rods. A number of through holes with an L-shaped cross-section are formed inside the pulley. Heat conducting rods with an L-shaped cross-section are closely attached inside the through holes formed inside the pulley.

[0007] Preferably, a dust-proof component is provided at the rear of the pulley. The dust-proof component includes a dust-proof cover, a dust-proof net, a rubber ring, and a positioning groove.

[0008] Preferably, a positioning groove is formed on the rear surface of the pulley, and a rubber ring is closely attached inside the positioning groove formed on the pulley.

[0009] Preferably, the rubber ring is fixedly connected to the dust-proof cover. An annular dust-proof net is provided in the middle of the dust-proof cover. One end of the dust-proof net is closely attached to the heat conducting rod.

[0010] Preferably, the dust-proof cover is closely attached to the pulley, and one end of the bushing is provided inside the dust-proof cover.

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

[0012] In the present utility model, through the provided tension pulley body, base, double torsion spring, tension pulley arm, belt pulley, bushing, heat dissipation component, through hole and heat conducting rod, the double torsion spring can meet higher torque requirements. After the belt and the belt pulley are in contact, heat is generated due to the friction between the belt and the belt pulley. Since the heat conducting rod is arranged in an L shape, the heat flows from the outer side of the belt pulley to the rear plate of the belt pulley through the heat conducting rod and dissipates, increasing the heat conduction effect at the belt pulley and avoiding the situation that the overheating of the belt pulley affects its service life. Through the provided dust-proof component, dust-proof cover, dust-proof net, rubber ring and positioning groove, the dust-proof cover is inserted into the positioning groove at the rear side of the belt pulley through the rubber ring for installation and fixation. At this time, one end of the dust-proof net is in contact with the heat conducting rod, making the heat conducting rod have a dust-proof effect, and dust is not easily introduced into the interior of the belt pulley through the heat conducting rod. By setting the double torsion spring on the tension pulley body, it can meet higher torque requirements. By setting the heat dissipation component inside the belt pulley, it has a heat dissipation effect during use. By setting the dust-proof component, it has a dust-proof function during heat dissipation. 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 installation structure of the tension pulley body of the present utility model;

[0015] Figure 3 is a schematic diagram of the cross-sectional structure of the belt pulley of the present utility model.

[0016] In the figure: 1, tension pulley body; 11, base; 12, double torsion spring; 13, tension pulley arm; 14, belt pulley; 15, bushing; 2, heat dissipation component; 21, through hole; 22, heat conducting rod; 3, dust-proof component; 31, dust-proof cover; 32, dust-proof net; 33, rubber ring; 34, positioning groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] 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 in 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.

[0018] 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 otherwise clearly specified in the context, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0019] 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 distinguishing the corresponding components. Without additional statements, the above terms have no special meanings, so it should not be construed as a limitation on the protection scope of the present invention.

[0020] Please refer to Figures 1-3 , the present utility model provides a technical solution:

[0021] An automatic tensioning pulley, comprising a tensioning pulley main body 1 for tensioning a belt. The tensioning pulley main body 1 includes a base 11, a double torsion spring 12, a tensioning pulley arm 13, a belt pulley 14 and a bushing 15. A tensioning pulley arm 13 is provided in front of the base 11 with two protruding sides. A double torsion spring 12 is provided between the base 11 and the tensioning pulley arm 13. A belt pulley 14 is rotatably connected to one side of the tensioning pulley arm 13. A bushing 15 penetrates through the middle of the belt pulley 14. A heat dissipation assembly 2 is provided inside the belt pulley 14. The heat dissipation assembly 2 includes through holes 21 and heat conducting rods 22. A plurality of through holes 21 with an L-shaped cross section are formed inside the belt pulley 14. Heat conducting rods 22 with an L-shaped setting are closely attached inside the through holes 21 formed inside the belt pulley 14. By setting the double torsion spring 12 of the tensioning pulley main body 1, higher torque requirements are met. By providing the heat dissipation assembly 2 inside the belt pulley 14, it has a heat dissipation effect during use. By providing a dust prevention assembly 3, it has a dust prevention function during heat dissipation.

[0022] A dust prevention assembly 3 is provided at the rear of the belt pulley 14. The dust prevention assembly 3 includes a dust cover 31, a dust screen 32, a rubber ring 33 and a positioning groove 34, which facilitates dust prevention at the belt pulley 14. A positioning groove 34 is formed on the rear surface of the belt pulley 14. The rubber ring 33 is closely attached inside the positioning groove 34 formed on the belt pulley 14, which facilitates the disassembly of the dust cover 31. The rubber ring 33 is fixedly connected to the dust cover 31. A dust screen 32 in a ring shape is provided in the middle of the dust cover 31. One end of the dust screen 32 is closely attached to the heat conducting rod 22, so that the heat conducting rod 22 has a dust prevention effect during the heat conduction process. The dust cover 31 is closely attached to the belt pulley 14. One end of the bushing 15 is provided inside the dust cover 31, which facilitates dust prevention at the bushing 15.

[0023] Working process: When the tensioner main body 1 is in use, it is first necessary to hold the base 11 by hand and install it in a suitable position. The belt bypasses the pulley 14. When the tensioner main body 1 is in the working state, through the double torsion springs 12 arranged in the base 11 and the tensioner arm 13, when the belt is in a slack state, the tensioner main body 1 can be automatically tensioned under the action of the elastic force of the double torsion springs 12. The pulley 14 and the belt rub against each other, generating heat on the outside of the pulley 14. The heat is transferred from one end of the heat conduction rod 22 in the pulley 14 to the other end and flows out from the rear side of the pulley 14, circulating and exchanging with the outside air for effective heat dissipation. Since a dust-proof component 3 is provided at the rear side of the pulley 14 and the dust-proof net 32 is at the joint with the heat conduction rod 22, the heat conduction rod 22 has a dust-proof effect during the heat dissipation process, and dust is not easily introduced into the inside of the pulley 14 through the heat conduction rod 22. When the dust-proof net 32 needs to be cleaned or the pulley 14 needs to be disassembled after long-term use, the dust-proof component 3 needs to be taken out, that is, the user holds the dust-proof cover 31 and pulls it backward, driving the rubber ring 33 away from the positioning groove 34 opened at the rear side of the pulley 14. After removal, the dust-proof cover 31 together with the dust-proof net 32 can be cleaned. By setting the double torsion springs 12 on the tensioner main body 1, it can meet higher torque requirements. By setting the heat dissipation component 2 in the pulley 14, it has a heat dissipation effect during use. By setting the dust-proof component 3, it has a dust-proof function during heat dissipation.

[0024] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. The standard parts used in this utility model can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art. Plus, the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here.

[0025] Although the embodiments of the present utility model 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 principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An automatic tensioner, comprising a tensioner body (1) for tensioning a belt, characterized in that: The tension wheel body (1) comprises a base (11), a double torsion spring (12), a tension wheel arm (13), a pulley (14) and a shaft sleeve (15); a tension wheel arm (13) is provided in front of the base (11) with protruding sides; a double torsion spring (12) is provided between the base (11) and the tension wheel arm (13); one side of the tension wheel arm (13) is rotatably connected to a pulley (14); a shaft sleeve (15) passes through the middle of the pulley (14); a heat dissipation component (2) is provided in the pulley (14); the heat dissipation component (2) comprises a through hole (21) and a heat conducting rod (22); a plurality of through holes (21) with L-shaped cross sections are provided in the pulley (14); and a heat conducting rod (22) with L-shaped cross sections is tightly fitted in the through holes (21) provided in the pulley (14).

2. The automatic tensioner according to claim 1, characterized in that: A dustproof assembly (3) is provided on the rear side of the pulley (14), and the dustproof assembly (3) comprises a dustproof cover (31), a dustproof net (32), a rubber ring (33) and a positioning groove (34).

3. The automatic tensioner according to claim 2, characterized in that: A positioning groove (34) is provided on the rear surface of the belt pulley (14), and a rubber ring (33) is tightly fitted in the positioning groove (34) provided on the belt pulley (14).

4. The automatic tensioner according to claim 2, characterized in that: The rubber ring (33) and the dust cover (31) are fixedly connected, and a dust screen (32) arranged in an annular shape is provided in the middle of the dust cover (31), and the dust screen (32) is tightly fitted to one end of the heat conducting rod (22).

5. The automatic tensioner according to claim 2, characterized in that: The dust cover (31) and the pulley (14) are tightly fitted, and one end of the shaft sleeve (15) is arranged inside the dust cover (31).

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