V-shaped tensioner capable of improving stability of belt wheel

Abstract

The utility model discloses a V-shaped tensioner for improving belt wheel stability, which comprises a pivot, a first belt wheel assembly, a second belt wheel assembly, a tensioning spring, a spring disc and an upper fixing piece, the first belt wheel assembly and the second belt wheel assembly are respectively sleeved on the pivot, the second belt wheel assembly is arranged above the first belt wheel assembly, and the spring disc is arranged on the upper fixing piece. The tensioning spring is connected to the shaft sleeve part of the first belt wheel assembly and the shaft sleeve part of the second belt wheel assembly in a sleeved mode, the first belt wheel assembly and the second belt wheel assembly are provided with limiting parts for limiting the upper end and the lower end of the tensioning spring respectively, the pivot is sleeved with the spring discs and located above the second belt wheel assembly, and the lower end of the pivot is provided with a lower limiting part. The upper fixing piece is fixedly connected to the upper end of the pivot. Through the spring disc and the tensioning spring, stability of tension of a transmission belt can be guaranteed, shaking of the belt is restrained, stability of a system is maintained, vibration and noise are reduced, the first belt wheel and the second belt wheel of the tensioner can be highly stable, and the working process of the tensioner is stable.

Description

Technical Field

[0001] The utility model relates to a field, in particular to a V-type tensioner for improving the stability of a pulley. Background Art

[0002] The automatic tensioner is a key component in the front-end accessory drive system of the engine. Its basic function is to maintain the constant tension of the transmission belt and prevent the belt from slipping. On this basis, it can also provide appropriate damping to attenuate the vibration in the accessory system and suppress the belt shaking to maintain the stability of the system and reduce vibration and noise. In the prior art, the V-type tensioner includes a pivot, a bushing and two groups of pulley assemblies arranged on the pivot. The friction between the control arms of the two groups of pulley assemblies is adjusted by a disc spring sheet on the pivot to adjust the resistance of the tensioner. However, the existing tensioner has poor stability in the height of the pulley. When the spring disc is compressed and deformed, the height of the pulley will produce a downward displacement under the action of pressure, which will make the stability of the tensioner worse. Therefore, it is necessary to improve the existing tensioner. Utility Model Content

[0003] The utility model aims to provide a V-type tensioner which can solve the problem of high instability of the pulley of the existing tensioner described in the background technology and improve the stability of the pulley.

[0004] To achieve the above purpose, the utility model is implemented through the following technical solutions: a V-type tensioner for improving the stability of the pulley, comprising a pivot, a first pulley assembly, a second pulley assembly, a tensioning spring, a spring disc and an upper fixing plate, the first pulley assembly and the second pulley assembly are respectively sleeved on the pivot, the second pulley assembly is located above the first pulley assembly, the tensioning spring is sleeved on the shaft sleeves of the first pulley assembly and the second pulley assembly, the first pulley assembly and the second pulley assembly are respectively provided with limiting portions for limiting the upper and lower ends of the tensioning spring, a plurality of spring discs are sleeved on the pivot and are located above the second pulley assembly, a lower limiting portion is provided at the lower end of the pivot, the lower limiting portion is arranged below the shaft sleeve of the first pulley assembly, and the upper fixing plate is fixedly connected to the upper end of the pivot.

[0005] In the above scheme, the first pulley assembly includes a first pulley, a first connecting arm and a lower tensioning seat, the first pulley is rotatably arranged at the outer end of the first connecting arm, the lower tensioning seat is fixedly arranged at the other end of the first connecting arm, a lower sleeve portion is arranged in the middle of the lower tensioning seat, the lower sleeve portion is sleeved on the lower part of the pivot, a first bushing is arranged in the shaft hole of the lower sleeve portion, a first end ring is arranged on the top of the first bushing, and the first end ring is arranged on the upper end surface of the lower sleeve portion. The friction between the first pulley assembly and the pivot can be reduced by arranging the first bushing, thereby extending its service life.

[0006] In the above scheme, the second pulley assembly includes a second pulley, a second connecting arm and an upper tensioning seat, the second pulley is rotatably arranged at the outer end of the second connecting arm, the upper tensioning seat is fixedly arranged at the other end of the second connecting arm, an upper sleeve portion is arranged in the middle of the upper tensioning seat, the upper sleeve portion is sleeved on the upper part of the pivot, a second bushing is arranged in the shaft hole of the upper sleeve portion, a second end ring is arranged on the top of the second bushing, the second end ring is arranged on the top of the upper tensioning seat, the spring disc is arranged above the second end ring, a tensioning groove opening downward is arranged on the outer side of the upper sleeve portion, the tensioning spring is arranged in the tensioning groove, and the lower part of the tensioning spring extends to the lower sleeve portion. The friction between the second pulley assembly and the pivot can be reduced by arranging the second bushing, thereby extending its service life. At the same time, the outer side of the tensioning spring can be limited by arranging the tensioning groove, so that the tensioning spring is kept outside the sleeve portions of the first pulley assembly and the second pulley assembly, so that the position of the tensioning spring is stable.

[0007] In the above scheme, a flat washer is arranged above the first end ring, and the flat washer is arranged below the second pulley assembly. By arranging the flat washer above the first end ring, the torsional resistance between the first pulley assembly and the second pulley assembly can be reduced, making the torsion more flexible.

[0008] In the above scheme, a flat washer is arranged above the second end ring, and the flat washer is arranged below the spring disc. By arranging the flat washer above the second end ring, the friction resistance of the upper end of the second pulley assembly can be reduced.

[0009] In the above solution, a lower gasket is provided between the lower limit portion and the lower end surface of the lower sleeve portion of the first pulley assembly. By providing the lower gasket, the friction resistance between the first pulley assembly and the lower limit portion of the pivot can be reduced.

[0010] In the above solution, the limiting part on the first pulley assembly is a limiting convex block arranged on the lower tensioning seat to limit the lower end of the tensioning spring. The limiting convex block can limit the lower end of the tensioning spring so that the tensioning spring cannot rotate circumferentially.

[0011] In the above solution, the limiting part on the second pulley assembly is a limiting block arranged in the tensioning groove to limit the upper end of the tensioning spring. The limiting block can limit the upper end of the tensioning spring so that the tensioning spring cannot rotate circumferentially.

[0012] The utility model has positive effects: 1) The V-type tensioner for improving the stability of the pulley of the utility model, the first pulley assembly and the second pulley assembly are respectively mounted on the pivot, and a spring disc is arranged above the second pulley assembly, and the spring disc can provide friction resistance to the first pulley assembly and the second pulley assembly through elastic deformation, limit the relative rotation of the first pulley assembly and the second pulley assembly, and provide damping and restoring elastic force for the relative rotation of the first pulley and the second pulley by arranging a tensioning spring, thereby ensuring the stability of the transmission belt tension, suppressing the belt shaking, maintaining the stability of the system, and reducing vibration and noise; 2) The V-type tensioner for improving the stability of the pulley of the utility model applies pressure to the first pulley assembly and the second pulley assembly through the elastic deformation of the spring disc, so that when the first pulley assembly and the second pulley assembly are in use, the height of the first pulley and the second pulley of the tensioner is stable, so that the working process of the tensioner is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the V-type tensioner of the utility model.

[0014] Figure 2 It is an exploded schematic diagram of the V-type tensioner of the utility model.

[0015] The accompanying drawings are marked as follows: pivot 1, lower limit portion 11, first pulley assembly 2, first pulley 21, first connecting arm 22, lower tensioning seat 23, lower sleeve portion 231, limit protrusion 232, first bushing 24, first end ring 25, flat washer 26, second pulley assembly 3, second pulley 31, second connecting arm 32, upper tensioning seat 33, upper sleeve portion 331, second bushing 34, second end ring 35, flat washer 36, tensioning groove 37, tensioning spring 4, spring disc 5, upper fixing plate 6, lower gasket 7. DETAILED DESCRIPTION

[0016] The technical solution of the utility model is described clearly and completely below through embodiments. Obviously, the described embodiments are only a part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] like Figure 1 and Figure 2 A V-type tensioner for improving pulley stability is shown, comprising a pivot 1, a first pulley assembly 2, a second pulley assembly 3, a tensioning spring 4, a spring disc 5 and an upper fixing plate 6.

[0018] The pivot 1 is an elongated cylindrical pivot, a lower limit portion 11 is provided at the lower end of the pivot 1 , an upper fixing plate 6 is provided at the top end of the pivot 1 , and the upper fixing plate 6 is fixedly connected to the pivot 1 .

[0019] The first pulley assembly 2 includes a first pulley 21, a first connecting arm 22 and a lower tensioning seat 23. The first pulley 21 is rotatably arranged at the outer end of the first connecting arm 22, and the lower tensioning seat 23 is fixedly arranged at the other end of the first connecting arm 22. A lower sleeve portion 231 is provided in the middle of the lower tensioning seat 23. The lower sleeve portion 231 is sleeved on the lower part of the pivot 1. A first bushing 24 is provided in the shaft hole of the lower sleeve portion 231. A first end ring 25 is provided at the top of the first bushing 24. The first end ring 25 is arranged on the upper end surface of the lower sleeve portion 231. A flat washer 26 is provided above the first end ring 25, and the flat washer 26 is arranged below the second pulley assembly 3. By arranging the flat washer 26 above the first end ring 25, the torsional resistance between the first pulley assembly 2 and the second pulley assembly 3 can be reduced, making the torsion more flexible.

[0020] On the lower tensioning seat 23, a limiting protrusion 232 is provided on the outer side of the lower sleeve portion 231, and the limiting protrusion 232 is used to limit the lower end of the tensioning spring 4. During installation, the lower end of the tensioning spring 4 abuts against the limiting protrusion 232, and the circumferential rotation of the tensioning spring 4 is limited by the limiting protrusion 232.

[0021] The second pulley assembly 3 includes a second pulley 31, a second connecting arm 32 and an upper tensioning seat 33. The second pulley 31 is rotatably arranged at the outer end of the second connecting arm 32, and the upper tensioning seat 33 is fixedly arranged at the other end of the second connecting arm 32. An upper shaft sleeve portion 331 is provided in the middle portion of the upper tensioning seat 33, and the upper shaft sleeve portion 331 is sleeved on the upper portion of the pivot 1. A second bushing 34 is provided in the axial hole of the upper shaft sleeve portion 331, and a second end ring 35 is provided on the top of the second bushing 34. The second end ring 35 is arranged on the top of the upper tensioning seat 33, and the spring disc 5 is arranged above the second end ring 35. A tensioning groove 37 with an opening downward is provided on the outer side of the upper shaft sleeve portion 331, and the tensioning spring 4 is arranged in the tensioning groove 37. A limit block for limiting the upper end of the tensioning spring 4 is provided in the tensioning groove 37. By setting the limit block, the upper end of the tensioning spring 4 can be limited so that the tensioning spring 4 cannot rotate circumferentially. The lower portion of the tensioning spring 4 extends to the limiting protrusion on the lower tensioning seat 23 of the first pulley assembly 2 .

[0022] A flat washer 36 is provided above the second end ring 35, and the flat washer 36 is provided below the spring disc 5. By providing the flat washer 36 above the second end ring 35, the friction resistance of the upper end portion of the second pulley assembly 3 can be reduced.

[0023] The spring disc 5 may have multiple pieces, for example, three spring discs may be used, and the three spring discs 5 are sleeved on the pivot 1 in alternating opposite bending directions and are located above the flat washer 36 , and the upper fixing plate 6 is fixedly connected to the upper end of the pivot 1 .

[0024] A lower stopper 11 is provided at the lower end of the pivot 1, and a lower gasket 7 is provided between the lower stopper 11 and the lower end surface of the lower sleeve 231 of the first pulley assembly 2. By providing the lower gasket 7, the friction resistance between the first pulley assembly 2 and the lower stopper 11 of the pivot 1 can be reduced.

[0025] The V-type tensioner for improving pulley stability of the utility model, when in use, the first pulley assembly and the second pulley assembly are used to tension the transmission belt. When the transmission belt vibrates, the friction resistance provided by the spring disc and the elastic force provided by the tensioning spring can block the movement of the transmission belt and eliminate the vibration of the transmission belt. At the same time, the tensioning spring can maintain a preset angle tension between the first pulley and the second pulley, so that the transmission belt remains in a tensioned state. The V-type tensioner for improving pulley stability of the utility model is provided with a spring disc above the second pulley assembly. The spring disc can provide a stable elastic force to the first pulley assembly and the second pulley assembly, so that the positions of the first pulley and the second pulley in the height direction are stable, and the transmission of the transmission belt is more stable.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A V-type tensioner for improving pulley stability, characterized in that: The invention comprises a pivot, a first pulley assembly, a second pulley assembly, a tensioning spring, a spring disc and an upper fixing plate. The first pulley assembly and the second pulley assembly are respectively sleeved on the pivot. The second pulley assembly is located above the first pulley assembly. The tensioning spring is sleeved on the shaft sleeves of the first pulley assembly and the second pulley assembly. The first pulley assembly and the second pulley assembly are respectively provided with limiting portions for limiting the upper and lower ends of the tensioning spring. A plurality of spring discs are sleeved on the pivot and are located above the second pulley assembly. A lower limiting portion is provided at the lower end of the pivot. The lower limiting portion is arranged below the shaft sleeve of the first pulley assembly. The upper fixing plate is fixedly connected to the upper end of the pivot.

2. The V-type tensioner for improving pulley stability according to claim 1, characterized in that: The first pulley assembly includes a first pulley, a first connecting arm and a lower tensioning seat, the first pulley is rotatably arranged at the outer end of the first connecting arm, the lower tensioning seat is fixedly arranged at the other end of the first connecting arm, a lower shaft sleeve portion is provided in the middle portion of the lower tensioning seat, the lower shaft sleeve portion is sleeved on the lower portion of the pivot, a first bushing is provided in the axial hole of the lower shaft sleeve portion, a first end ring is provided on the top of the first bushing, and the first end ring is provided on the upper end surface of the lower shaft sleeve portion.

3. The V-type tensioner for improving pulley stability according to claim 2, characterized in that: The second pulley assembly includes a second pulley, a second connecting arm and an upper tensioning seat. The second pulley is rotatably arranged at the outer end of the second connecting arm, and the upper tensioning seat is fixedly arranged at the other end of the second connecting arm. An upper shaft sleeve portion is provided in the middle portion of the upper tensioning seat, and the upper shaft sleeve portion is sleeved on the upper portion of the pivot. A second bushing is provided in the axial hole of the upper shaft sleeve portion, and a second end ring is provided on the top of the second bushing. The second end ring is arranged on the top of the upper tensioning seat, and the spring disc is arranged above the second end ring. A tensioning groove opening downward is provided on the outer side of the upper shaft sleeve portion, and the tensioning spring is arranged in the tensioning groove, and the lower part of the tensioning spring extends to the lower shaft sleeve portion.

4. The V-type tensioner for improving pulley stability according to claim 2, characterized in that: A flat washer is disposed above the first end ring and is disposed below the second pulley assembly.

5. The V-type tensioner for improving pulley stability according to claim 3, characterized in that: A flat washer is arranged above the second end ring and below the spring disc.

6. The V-type tensioner for improving pulley stability according to claim 1, characterized in that: A lower gasket is provided between the lower limiting portion and the lower end surface of the lower shaft sleeve portion of the first pulley assembly.

7. The V-type tensioner for improving pulley stability according to claim 2, characterized in that: The limiting portion on the first pulley assembly is a limiting protrusion arranged on the lower tensioning seat for limiting the lower end of the tensioning spring.

8. The V-type tensioner for improving pulley stability according to claim 3, characterized in that: The limiting portion on the second pulley assembly is a limiting block arranged in the tensioning groove for limiting the upper end of the tensioning spring.

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