CN217898674U - Tensioner, engine accessory system and engine - Google Patents

Abstract

The utility model relates to a tensioner, an engine accessory system and an engine, the tensioner comprises a base, a swing arm and a belt pulley, wherein, the base is provided with a pivot, the pivot is rotatably connected with a first end of the swing arm, a second end of the swing arm is rotatably connected with the belt pulley, a first sealing structure is arranged between the matching surfaces of the base and the swing arm, and a second sealing structure is arranged between one side of the swing arm far away from the base and the pivot; in application, two positions between the base and the swing arm need to be sealed, one position is the matching surface position between the only opening end of the base and the swing arm, and the other position is the matching position between one side of the swing arm far away from the base and the pivot, therefore, effective sealing between the swing arm and the base can be realized by arranging sealing structures at the matching surface position of the base and the swing arm and the matching position of the swing arm and the pivot respectively, the entry of dirt in the external environment is avoided, and the service life of the tensioner is prolonged so as to meet the market application requirements.

Description

Tensioner, engine accessory system and engine

Technical Field

The utility model relates to an engine attachment technical field, in particular to tensioning ware, engine attachment system and engine.

Background

Automobile engine annex system authentication is experimental, need carry out extremely abominable environmental test (soaking, salt fog, mud, high-pressure injection etc.) and be used for satisfying whole car test technical requirement, but present product design is because there is relative swing in tensioning ware swing arm and tensioning ware base, so there is the clearance between motion part and the static part, external environment foul can get into inside the part from the clearance, lead to tensioning ware internals to rust, it can influence the function of product corresponding to adhere to the dirt on part surface simultaneously, and then lead to the decay of part internals life-span, can't satisfy market application requirement.

SUMMERY OF THE UTILITY MODEL

A first object of the utility model is to provide a tensioner to improve the sealing performance between tensioner swing arm and the base, reduce or avoid the entering of external environment foul, prolong the life of tensioner in order to satisfy market application requirement.

A second object of the present invention is to provide an engine accessory system and an engine based on the tensioner.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a tensioner, includes base, swing arm and belt pulley, the base is provided with the pivot, the pivot with the first end rotatable coupling of swing arm, the second end of swing arm with belt pulley rotatable coupling, the base with be provided with first seal structure between the fitting surface of swing arm, the swing arm is kept away from one side of base with be provided with second seal structure between the pivot.

Optionally, the first sealing structure comprises:

the concave-convex matching structure is arranged between the matching surfaces of the base and the swing arm;

and the lip-shaped sealing ring is arranged between the groove and the protrusion of the concave-convex matching structure.

Optionally, the unsmooth cooperation structure including set up in the annular bulge of the first end of swing arm and set up in the annular groove of base, the annular bulge with the annular groove with the pivot is coaxial to be set up, the bellied inside wall of annular with be provided with between the inside wall of annular groove the lip seal circle.

Optionally, a limiting groove for limiting the lip-shaped sealing ring is formed between the inner side wall of the annular protrusion and the inner side wall of the annular groove, and the lip-shaped sealing ring is embedded in the limiting groove.

Optionally, the second sealing structure includes a sealing gasket, and the sealing gasket is in interference fit with the pivot and the swing arm, respectively.

Optionally, the sealing gasket includes a metal frame and a rubber layer covering the metal frame.

Optionally, the outer peripheral surface of the sealing gasket is a conical surface, the minimum diameter of the conical surface is smaller than the diameter of the containing groove of the swing arm for containing the sealing gasket, and the maximum diameter of the conical surface is larger than the diameter of the containing groove of the swing arm for containing the sealing gasket.

Optionally, a stepped surface is arranged at one end of the pivot matched with the sealing gasket, and the stepped surface is matched with the sealing gasket to limit the sealing gasket.

Optionally, the second end of the swing arm is rotatably connected to the pulley through a bearing, a sealing cover is disposed on one side of the pulley away from the second end of the swing arm, and the sealing cover is matched with the inner ring of the pulley to cover the bearing.

Optionally, the second end of the swing arm is provided with an annular extension portion extending towards the pulley, and the inner diameter of the annular extension portion is larger than the outer diameter of the inner ring of the pulley.

An engine accessory system comprising a tensioner as claimed in any preceding claim.

An engine comprising an engine accessory system as described above.

According to the technical scheme, the utility model discloses a tensioner, which comprises a base, a swing arm and a belt pulley, wherein the base is provided with a pivot, the pivot is rotatably connected with a first end of the swing arm, a second end of the swing arm is rotatably connected with the belt pulley, a first sealing structure is arranged between the matching surfaces of the base and the swing arm, and a second sealing structure is arranged between one side of the swing arm, which is far away from the base, and the pivot; in application, two positions between the base and the swing arm need to be sealed, one position is the matching surface position between the only opening end of the base and the swing arm, and the other position is the matching position between one side of the swing arm far away from the base and the pivot, therefore, effective sealing between the swing arm and the base can be realized by arranging sealing structures at the matching surface position of the base and the swing arm and the matching position of the swing arm and the pivot respectively, the entry of dirt in the external environment is avoided, and the service life of the tensioner is prolonged so as to meet the market application requirements.

The utility model also provides an engine accessory system and engine based on above-mentioned tensioning ware, because this engine accessory system and engine have adopted as above tensioning ware, consequently engine accessory system and engine reason should possess the beneficial effect of above-mentioned tensioning ware, no longer describe herein.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is an exploded view of a tensioner as disclosed in an embodiment of the present invention;

fig. 2 is a cross-sectional view of a tensioner as disclosed in an embodiment of the present invention.

Wherein:

1 is a base; 101 is a shell; 102 is a middle shell; 103 is a lining; 2 is a pivot; 3 is a bushing; 4 is a sealing gasket; 5 is a swing arm; 6 is a belt pulley; 7 is an assembling bolt; 8 is a sealing cover; 9 is a torsion spring; 10 is an annular bulge; 11 is an annular groove; 12 is a lip-shaped sealing ring; 13 is a containing groove; and 14 is a bearing.

Detailed Description

One of the cores of the utility model is to provide a tensioner, this tensioner's structural design makes it can improve the sealing performance between tensioner swing arm and the base, reduces or avoids the entering of external environment foul, and extension tensioner's life is in order to satisfy market application requirement.

The utility model discloses another core provides an engine attachment system and engine based on above-mentioned tensioning ware.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 and 2, fig. 1 is an exploded view of a tensioner according to an embodiment of the present invention, and fig. 2 is a sectional view of the tensioner according to an embodiment of the present invention.

The embodiment of the utility model provides an in disclose a tensioning ware, this tensioning ware includes base 1, swing arm 5 and belt pulley 6.

Wherein, base 1 is provided with pivot 2, and pivot 2 passes through bush 3 rotatable coupling with the first end of swing arm 5, and is provided with torsion spring 9 between swing arm 5 and the base 1 so that swing arm 5 resets, and swing arm 5's second end and belt pulley 6 rotatable coupling are provided with first seal structure between the fitting surface of base 1 and swing arm 5, and swing arm 5 keeps away from and is provided with the second seal structure between base 1's one side and the pivot 2.

It can be seen, compared with the prior art, the embodiment of the utility model provides a tensioner is in using, it needs to be sealed to have two between base 1 and the swing arm 5, one of which is base 1's only one open end and the fitting surface department between the swing arm 5, its two one sides and the 2 cooperation departments of pivot that keep away from base 1 for swing arm 5, consequently, it can realize the effective seal between swing arm 5 and the base 1 through setting up seal structure in base 1 and swing arm 5's fitting surface department and swing arm 5 and the 2 cooperation departments of pivot respectively, avoid the entering of foul among the external environment, the life of extension tensioner is in order to satisfy market application requirement.

Base 1 can adopt the integral type structure, also can adopt split type structure, as shown in fig. 1 in the embodiment of the utility model provides an embodiment, base 1 adopts split type structure, and base 1 includes shell 101, mesochite 102 and inside lining 103, can adopt modes fixed coordination such as joint, welding or spiro union between shell 101, mesochite 102 and the inside lining 103.

Specifically, as shown in fig. 2, in an embodiment of the present invention, the first sealing structure includes a concave-convex matching structure and a lip-shaped sealing ring 12, the concave-convex matching structure is disposed between the matching surfaces of the base 1 and the swing arm 5, the concave-convex matching structure forms a zigzag labyrinth sealing structure, the lip-shaped sealing ring 12 is disposed between the groove and the protrusion of the concave-convex matching structure, and one or more lip-shaped sealing rings 12 can be disposed in the labyrinth sealing structure, it should be noted that the labyrinth sealing structure can surround 2 circles of the pivot, and also can not be disposed as a circle, but only dispose the labyrinth sealing structure outside the belt pulley 6.

As shown in fig. 2, the concave-convex matching structure includes an annular protrusion 10 disposed at the first end of the swing arm 5 and an annular groove 11 disposed on the base 1, the annular protrusion 10 and the annular groove 11 are disposed coaxially with the pivot 2, a lip-shaped sealing ring 12 is disposed between the inner side wall of the annular protrusion 10 and the inner side wall of the annular groove 11, the lip of the lip-shaped sealing ring 12 faces the base 1, and two lips of the lip-shaped sealing ring 12 are respectively in contact fit with the inner side wall of the annular protrusion 10 and the inner side wall of the annular groove 11.

Further optimize above-mentioned technical scheme the embodiment of the utility model provides an in, be formed with between the inside wall of above-mentioned annular protrusion 10 and the inside wall of annular groove 11 and be used for carrying out spacing groove to lip seal 12, lip seal 12 inlays locates the spacing inslot to when avoiding rotating relatively between swing arm 5 and the base 1, lip seal 12 is along circumference drunkenness, influences the sealed effect between swing arm 5 and the base 1 fitting surface.

Specifically, lip seal 12 should adopt to have certain elasticity and wear-resisting material preparation to when guaranteeing sealed effect, increase of service life in the embodiment of the utility model provides an in, adopt wear-resisting HNBR rubber materials preparation lip seal 12.

Preferably, in the embodiment of the present invention, the second sealing structure includes a sealing gasket 4, the sealing gasket 4 is in interference fit with the pivot 2 and the swing arm 5 respectively, as shown in fig. 2, a side surface of the swing arm 5 away from the base 1 is provided with a containing groove 13, a depth of the containing groove 13 is not less than a thickness of the sealing gasket 4, so as to contain the sealing gasket 4, an outer peripheral surface of the sealing gasket 4 is in interference fit with an inner side wall of the containing groove 13, and an inner peripheral surface of the sealing gasket 4 is in interference fit with an outer peripheral surface of the pivot 2, so as to form a seal between the swing arm 5 and the pivot 2.

Further, in the embodiment of the present invention, the sealing gasket 4 includes a metal frame and a rubber layer coated outside the metal frame, and the rubber layer is made of HNBR rubber material the same as the lip-shaped sealing ring 12.

For avoiding friction production metal piece between metal framework and the swing arm 5 the embodiment of the utility model provides an in, still be provided with the damping gasket between seal gasket 4 and the swing arm 5, this damping gasket adopts non-metallic wear-resistant material to make to avoid direct contact friction between seal gasket 4's metal framework and the swing arm 5.

Preferably, in the embodiment of the present invention, as shown in fig. 1 and fig. 2, the outer peripheral surface of the sealing gasket 4 is a conical surface, the minimum diameter of the conical surface is smaller than the diameter of the accommodating groove 13 of the swing arm 5 for accommodating the sealing gasket 4, and the maximum diameter of the conical surface is larger than the diameter of the accommodating groove 13 of the swing arm 5 for accommodating the sealing gasket 4, so that when the sealing gasket 4 is loaded into the accommodating groove 13, the conical surface can play a role of guiding so as to load the sealing gasket 4, and simultaneously, the interference fit between the sealing gasket 4 and the swing arm 5 and the pivot 2 can be realized through the squeezing effect of the conical surface.

Further optimize above-mentioned technical scheme, in the embodiment of the utility model provides an, pivot 2 is provided with the step face with seal gasket 4 complex one end, and the step face cooperates with seal gasket 4 to carry on spacingly to seal gasket 4, when packing seal gasket 4 into pivot 2, this step face can carry on spacingly to seal gasket 4 to prevent seal gasket 4's side and swing arm 5 contact and increase the frictional force when swing arm 5 rotates.

In the embodiment of the present invention, the pivot 2 and the sealing gasket 4 are detachable structures, and in other embodiments, the pivot 2 and the sealing gasket 4 may be an integrated structure.

Preferably, the second end of the swing arm 5 is rotatably connected to the belt pulley 6 through a bearing 14, an inner ring of the bearing 14 is mounted at the second end of the swing arm 5 through a mounting bolt 7, an outer ring of the bearing 14 is sleeved in the inner ring of the belt pulley 6 to enable the belt pulley 6 to rotate relative to the second end of the swing arm 5, and the protection of the bearing 14 also becomes a problem to be considered in this structure, for this reason, in the embodiment of the present invention, as shown in fig. 2, a sealing cover 8 is disposed on a side of the belt pulley 6 away from the second end of the swing arm 5, and the sealing cover 8 is matched with the inner ring of the belt pulley 6 to cover the bearing 14, so as to protect the bearing 14, prevent dirt in an external environment from entering the bearing 14, and prolong the service life of the bearing 14.

Further optimizing the above technical solution, as shown in fig. 2, the second end of the swing arm 5 is provided with an annular extension portion extending towards the direction of the belt pulley 6, an inner diameter of the annular extension portion is larger than an outer diameter of an inner ring of the belt pulley 6, the annular extension portion can protect another side of the bearing 14 away from the sealing cover 8, and the probability that dirt enters the external environment from the side of the bearing 14 away from the sealing cover 8 is reduced.

An embodiment of the present invention further provides an engine accessory system, which includes the tensioner according to the above embodiment, and the tensioner according to the above embodiment is adopted in the engine accessory system, so that the technical effect of the engine accessory system is as described in the above embodiment.

Based on the above engine accessory system, the embodiment of the present invention further provides an engine, the engine includes the engine accessory system as described above, and since the engine employs the engine accessory system including the tensioner in the above embodiment, the technical effect of the engine is also referred to the above embodiment.

It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.

It should be understood that the use of "system," "device," "unit," and/or "module" herein is merely one way to distinguish between different components, elements, components, parts, or assemblies of different levels. However, other words may be substituted by other expressions if they accomplish the same purpose.

As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements. An element defined by the phrase "comprising a … …" does not exclude the presence of additional identical elements in a process, method, article, or apparatus that comprises the element.

In the description of the embodiments herein, "/" means "or" unless otherwise specified, for example, a/B may mean a or B; "and/or" herein is merely an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality" means two or more than two.

In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

If used herein, a flowchart is provided to illustrate operations performed by a system according to an embodiment of the present application. It should be understood that the preceding or following operations are not necessarily performed in the exact order in which they are performed. Rather, the steps may be processed in reverse order or simultaneously. Meanwhile, other operations may be added to the processes, or a certain step or several steps of operations may be removed from the processes.

It is also noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in an article or apparatus that comprises the element.

The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the core concepts of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (12)

1. The utility model provides a tensioner, its characterized in that, includes base, swing arm and belt pulley, the base is provided with the pivot, the pivot with the first end rotatable coupling of swing arm, the second end of swing arm with belt pulley rotatable coupling, the base with be provided with first seal structure between the fitting surface of swing arm, the swing arm is kept away from one side of base with be provided with second seal structure between the pivot.

2. The tensioner as in claim 1, wherein the first sealing structure comprises:

the concave-convex matching structure is arranged between the matching surfaces of the base and the swing arm;

and the lip-shaped sealing ring is arranged between the groove and the protrusion of the concave-convex matching structure.

3. The tensioner as in claim 2, wherein the male-female engagement structure comprises an annular protrusion disposed at the first end of the swing arm and an annular groove disposed in the base, the annular protrusion and the annular groove being disposed coaxially with the pivot shaft, the lip seal being disposed between an inner sidewall of the annular protrusion and an inner sidewall of the annular groove.

4. The tensioner as in claim 3, wherein a limiting groove for limiting the lip-shaped seal ring is formed between an inner side wall of the annular protrusion and an inner side wall of the annular groove, and the lip-shaped seal ring is embedded in the limiting groove.

5. The tensioner as in any one of claims 1-4, wherein the second sealing structure comprises a sealing gasket in interference fit with the pivot shaft and the swing arm, respectively.

6. The tensioner as in claim 5, wherein the sealing gasket comprises a metal frame and a rubber layer coated on the metal frame.

7. The tensioner as claimed in claim 6, wherein the outer peripheral surface of the sealing gasket is a tapered surface, the smallest diameter of the tapered surface is smaller than the diameter of the groove of the swing arm for accommodating the sealing gasket, and the largest diameter of the tapered surface is larger than the diameter of the groove of the swing arm for accommodating the sealing gasket.

8. The tensioner as in claim 6, wherein the end of the pivot shaft that engages the sealing gasket is provided with a step surface that engages the sealing gasket to limit the sealing gasket.

9. The tensioner as in any one of claims 1-4 and 6-8, wherein the second end of the swing arm is rotatably coupled to the pulley via a bearing, and a sealing cap is disposed on a side of the pulley away from the second end of the swing arm, and engages with the inner race of the pulley to cover the bearing therein.

10. The tensioner as in claim 9, wherein the second end of the swing arm is provided with an annular extension extending in a direction toward the pulley, the annular extension having an inner diameter dimension greater than an outer diameter dimension of the inner race of the pulley.

11. An engine accessory system comprising the tensioner of any one of claims 1-10.

12. An engine comprising the engine accessory system of claim 11.

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