CN220101925U - Torsional vibration damper, engine and vehicle - Google Patents

Abstract

The utility model provides a torsional vibration damper, an engine and a vehicle, wherein the torsional vibration damper comprises a connecting wheel and an inertia ring; the inertia ring is sleeved on the fifth wheel, and the inertia ring covers the outer peripheral wall of the fifth wheel; the outer diameters of the radial sections of the inertia ring away from the fifth wheel are equal. According to the torsional vibration damper provided by the utility model, the inertia ring sleeved on the fifth wheel covers the peripheral wall of the fifth wheel, so that the structure for driving engine accessories in the axial direction of the connecting wheel is removed on the basis of reserving the space for installing the inertia ring. The outer diameters of the radial sections of the inertia ring away from the fifth wheel are equal to eliminate the structure for driving engine accessories in the radial direction of the inertia ring on the basis of ensuring that the inertia ring can generate the required rotational inertia. The torsional vibration damper, the engine and the vehicle provided by the utility model have the advantages of low design difficulty, simple structure and low production and manufacturing difficulty, are beneficial to reducing the forming cost, and can avoid the cost waste caused by the arrangement of the structure for driving the engine accessories.

Description

Torsional vibration damper, engine and vehicle

Technical Field

The utility model relates to the technical field of vehicles, in particular to a torsional vibration damper, an engine and a vehicle.

Background

Along with the large-scale popularization and application of new energy automobiles, a special hybrid engine is generated, wherein a more remarkable point change is that engine accessories (such as a water pump, a cold air compressor and the like) are driven by traditional machinery instead of electricity. The mechanical drive is that a crankshaft torsional damper (Torsional Vibration Damper, or referred to as a torsional damper hereinafter simply as TVD) is connected to a crankshaft of an engine, and the TVD drives engine accessories by mounting a transmission member such as a belt or providing a transmission structure. When the engine accessory is changed to be electrically driven, the corresponding TVD only has the function of reducing engine torsional vibration.

However, in the related art, the TVD with the mechanical driving function is still used for the special hybrid engine, that is, the TVD is still provided with a structure for driving the engine accessories, which makes the TVD complicated in structure and high in molding cost.

Disclosure of Invention

The utility model provides a torsional vibration damper, an engine and a vehicle, which are used for solving the problems of complex structure and high forming cost caused by the fact that a TVD (transient voltage detector) for a hybrid engine is still provided with a structure for driving an engine accessory in the related art.

In view of the above object, a first aspect of the present utility model provides a torsional vibration damper, comprising: a fifth wheel and inertia ring; the inertia ring is sleeved on the connecting wheel, and the inertia ring covers the outer peripheral wall of the connecting wheel; the outer diameters of the radial sections of the inertia ring away from the fifth wheel are equal.

Further, the fifth wheel comprises a wheel disc and a rim connected to the outer edge of the wheel disc, a hub for connecting a crankshaft is arranged in the center of the wheel disc, and the inertia ring is sleeved on the outer side of the rim.

Further, the wheel disc is proximate an end of the rim.

Further, a rubber ring is further arranged between the rim and the inertia ring, and protrusions are arranged on the circumference of the inner circumference of the inertia ring towards the rim.

Further, the peripheral wall of the rim is provided with a groove matched with the protrusion.

Further, the wheel disc is uniformly distributed with at least two through holes around the center at intervals.

Further, the through hole is a kidney-shaped hole.

Based on the same inventive concept, a second aspect of the present utility model provides an engine comprising a torsional vibration damper as described in the first aspect.

Further, the engine also comprises a cylinder body and a housing connected with the cylinder body, wherein an accommodating space is formed between the housing and the cylinder body; the torsional vibration damper is located in the accommodating space.

Further, the housing is of an integrally formed structure, and the accommodating space is a closed space.

Further, the torsional vibration damper further comprises a rubber ring, and the rubber ring is oil-resistant and high-temperature-resistant.

Based on the same inventive concept, a third aspect of the present utility model provides a vehicle comprising a torsional vibration damper as described in the first aspect or an engine as described in the second aspect.

According to the torsional vibration damper provided by the utility model, the inertia ring sleeved on the connecting wheel covers the peripheral wall of the connecting wheel, so that the connecting wheel removes a structure for driving engine accessories in the axial direction of the connecting wheel on the basis of reserving the space for installing the inertia ring. The outer diameters of the radial sections of the inertia ring away from the fifth wheel are equal, and the structure for driving engine accessories in the radial direction of the inertia ring is eliminated on the basis of ensuring that the inertia ring can generate required rotary inertia.

The torsional vibration damper, the engine and the vehicle provided by the embodiment have low design difficulty, simple structure and low production and manufacturing difficulty, are beneficial to reducing the forming cost, and can avoid the cost waste caused by the arrangement of the structure for driving the engine accessory.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the description serve to explain, without limitation, the utility model. In the drawings:

FIG. 1 is a schematic view of a torsional vibration damper according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view taken along the direction A-A in FIG. 1;

FIG. 3 is a schematic illustration of an engine according to an embodiment of the present utility model;

FIG. 4 is a schematic illustration of an embodiment of the present utility model with a housing removed;

fig. 5 is a cross-sectional view of an engine according to an embodiment of the present utility model.

Reference numerals illustrate:

1. a torsional vibration damper; 1-1, connecting a wheel; 1-1 to 1, a rim; 1-1-1-1, grooves; 1-1-2, a wheel disc; 1-1-3, a hub; 1-1-4, through holes; 1-2, inertia ring; 1-2-1, protrusions; 1-3, rubber ring;

2. a cylinder; 2-1, an upper cylinder body; 2-2, lower cylinder;

3. a crankshaft; 4. an oil pan; 5. a housing; 6. TVD bolts; 7. an accommodation space.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, a further description of aspects of the present disclosure will be provided below. It should be noted that, without conflict, the embodiments of the present disclosure and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the disclosure.

As shown in fig. 1 and 2, the embodiment of the present disclosure provides a torsional vibration damper 1 including a fifth wheel 1-1 and an inertia ring 1-2; the inertia ring 1-2 is sleeved on the fifth wheel 1-1, and the inertia ring 1-2 covers the peripheral wall of the fifth wheel 1-1; the respective radial sections of the inertia ring 1-2 are equal in outer diameter away from the fifth wheel 1-1.

Optionally, the inertia ring 1-2 and the fifth wheel 1-1 are made of gray cast iron or steel, and the machining mode can be an integral molding mode such as casting or a mechanical machining mode such as milling.

The outer peripheral wall of the fifth wheel 1-1 is an annular wall where the outer contour of the radial cross section (e.g., the cross section in the direction of fig. 1) of the fifth wheel 1-1 is located. The outer peripheral wall of the inertia ring 1-2 is an annular wall where the outer contour of a radial cross section (e.g., a cross section in the direction of fig. 1) of the inertia ring 1-2 is located.

In the related art, a structure for driving engine accessories (such as a V-groove or the like, hereinafter referred to as an accessory driving structure) is generally provided on the outer peripheral wall of the fifth wheel 1-1 or the outer peripheral wall of the inertia ring 1-2. When provided on the peripheral wall of the fifth wheel 1-1, the peripheral wall of the fifth wheel 1-1 has a greater length in its axial direction (i.e., the x-direction in FIG. 2) so that the inertia ring 1-2 and accessory drive structure can be placed side-by-side on the peripheral wall of the fifth wheel 1-1 in the axial direction of the fifth wheel 1-1. This structure increases the structural complexity of the fifth wheel 1-1 on the one hand and the material and cost required to form the fifth wheel 1-1 on the other hand. In addition, since the inertia ring 1-2 is required to generate rotational inertia in accordance with design requirements when rotated, when the accessory driving structure is disposed on the outer peripheral wall of the inertia ring 1-2, the outer diameter of the inertia ring 1-2 is larger, and on the same time, the structural complexity of the inertia ring 1-2 is increased, and on the other hand, the material and cost required for molding the inertia ring 1-2 are increased.

For hybrid or electric engines and the like, which do not require mechanical drive for engine accessories, torsional vibration dampers do not require accessory drive arrangements. Therefore, in the torsional damper 1 provided in this embodiment, the outer peripheral wall of the fifth wheel 1-1 reserves a space for mounting the inertia ring 1-2, and the outer peripheral wall of the fifth wheel 1-1 has an axial length along the fifth wheel 1-1 that is less than or equal to the axial length of the inertia ring 1-2, i.e., the inertia ring 1-2 covers the outer peripheral wall of the fifth wheel 1-1. The axial length of the outer peripheral wall of the fifth wheel 1-1 in the torsional vibration damper 1 of the present embodiment is shorter than that of the fifth wheel 1-1 provided with the accessory drive structure. Meanwhile, the outer peripheral wall of the inertia ring 1-2 is formed by overlapping the outer contours of innumerable radial sections along the axial direction of the inertia ring 1-2, and as an accessory driving structure is not required to be arranged on the outer peripheral wall of the inertia ring 1-2, namely the outer diameter of the inertia ring 1-2 does not change in the axial direction, the outer diameters of the radial sections of the inertia ring 1-2 far away from the fifth wheel 1-1 are equal.

The torsional vibration damper 1 provided in this embodiment is simple in design, low in manufacturing difficulty, and capable of avoiding cost waste caused by the arrangement of the accessory drive structure.

As shown in FIGS. 1 and 2, in some embodiments, the fifth wheel 1-1 includes a wheel disc 1-1-2 and a rim 1-1-1 coupled to an outer edge of the wheel disc 1-1-2, the wheel disc 1-1-2 is centrally provided with a hub 1-1-3 for coupling with a crankshaft 3, and an inertia ring 1-2 is fitted around an outer side of the rim 1-1-1.

The torsional vibration damper 1 is fitted over the end of the crankshaft 3 of the engine via hubs 1-1-3, and the torsional vibration damper 1 and the crankshaft 3 are connected by fasteners such as bolts. The rim 1-1-1 is used for installing the inertia ring 1-2, and plays a role in bearing and supporting the inertia ring 1-2. The wheel disc 1-1-2 is used for connecting the wheel rim 1-1-1 and the wheel hub 1-1-3 into a whole, and ensuring that the rotational inertia generated by the inertia ring 1-2 can act on the crankshaft 3 to achieve the vibration reduction effect.

As shown in FIG. 2, in some embodiments, the wheel disc 1-1-2 is adjacent an end of the wheel rim 1-1-1.

When the torsional vibration damper 1 is mounted on the crankshaft 3, the hub 1-1-3 on the wheel disc 1-1-2 is abutted against the end part of the crankshaft 3, so that the wheel disc 1-1-2 is arranged at one end part of the rim 1-1, the distance that the crankshaft 3 axially extends into the rim 1-1-1 can be shortened, and the axial length of the crankshaft 3 can be shortened, so that the whole structure of the engine is more compact.

As shown in FIG. 2, in some embodiments, a rubber ring 1-3 is further arranged between the rim 1-1-1 and the inertia ring 1-2, and a protrusion 1-2-1 is arranged on the circumference of the inner circumferential wall of the inertia ring 1-2 facing the rim 1-1-1.

Optionally, the rubber ring 1-3 may also be secured to the inertia ring 1-2 and/or the rim 1-1-1 by vulcanization.

Alternatively, the protrusions 1-2-1 may be annular protrusions or bar-shaped protrusions uniformly distributed around the center of the inertia ring 1-2 at intervals.

The rubber ring 1-3 is fixed between the rim 1-1-1 and the inertia ring 1-2, the rubber ring 1-3 is deformed through the extrusion action of the bulge 1-2-1 arranged on the inertia ring 1-2 and facing the rim 1-1, and the axial position among the inertia ring 1-2, the rubber ring 1-3 and the connecting wheel 1-1 is ensured to be fixed.

As shown in FIG. 2, in some embodiments, the peripheral wall of rim 1-1-1 is provided with a recess 1-1-1-1 that mates with protrusion 1-2-1.

In order to further ensure the axial position fixing among the inertia ring 1-2, the rubber ring 1-3 and the connecting wheel 1-1, a groove 1-1-1 is arranged on the peripheral wall of the rim 1-1-1, an axial limiting structure can be formed between the bulge 1-2-1 and the groove 1-1-1, meanwhile, the bulge 1-2-1 of the inertia ring 1-2 can press part of the rubber ring 1-3 into the groove 1-1-1-1, and the possibility that the bulge 1-2-1 slides out of the groove 1-1-1 is reduced.

In some embodiments, as shown in FIGS. 1 and 2, the discs 1-1-2 are uniformly spaced around the center with at least two through holes 1-1-4 therethrough.

Optionally, a chamfer is arranged on the periphery of the hole opening of the through hole 1-1-4.

Optionally, four through holes 1-1-4 are arranged on the wheel disc 1-1-2.

Through holes 1-1-4 are arranged on the wheel disc 1-1-2, so that the weight and manufacturing cost of the wheel disc 1-1-2 are reduced in a mode of reducing the material of the wheel disc 1-1-2. Meanwhile, in order to ensure balance of the fifth wheel 1-1 when rotated, the through holes 1-1-4 need to be uniformly distributed around the center of the roulette wheel 1-1-2.

In some embodiments, as shown in FIGS. 1 and 2, the through holes 1-1-4 are kidney-shaped holes.

Compared with the round through holes 1-1-4, the through holes 1-1-4 on the wheel disc 1-1-2 are arranged as waist-shaped holes, so that the number of the through holes 1-1-4 can be reduced on the premise of the same weight reduction effect, the forming difficulty of the connecting wheel 1-1 is reduced, the forming die is simplified, and the forming cost is reduced.

Based on the same inventive concept, in combination with the description of the torsional vibration damper 1 of the above embodiments, this embodiment provides an engine, which has the corresponding technical effects of the torsional vibration damper 1 of the above embodiments, and will not be described herein again.

As shown in fig. 3, 4 and 5, an engine includes the torsional vibration damper 1 of any one of the embodiments described above.

As shown in fig. 3, 4 and 5, in some embodiments, the engine further includes a cylinder block 2 and a casing 5 connected to the cylinder block 2, and an accommodating space 7 is formed between the casing 5 and the cylinder block 2; the torsional vibration damper 1 is located in the accommodation space 7.

Optionally, the engine cylinder 2 comprises an upper cylinder 2-1 and a lower cylinder 2-2 positioned below the upper cylinder 2-1, the upper cylinder 2-1 is connected with the lower cylinder 2-2, and an oil pan 4 is also connected below the lower cylinder 2-2. The housing 5 is connected to one side of the upper cylinder 2-1 and the lower cylinder 2-2. The crankshaft 3 is mostly located in the cylinder body 2, one end of the crankshaft 3 extends out of the cylinder body 2 into the accommodating space 7, and the torsional vibration damper 1 is abutted to the end of the crankshaft 3 and connected with the crankshaft 3 through the TVD bolt 6 in threaded connection with the end of the crankshaft 3.

In the above-described torsion damper having a mechanical driving function, since the torsion damper needs to be mounted or provided with an accessory driving structure to drive engine accessories, the torsion damper must be provided outside the engine. Typically, the end of the crankshaft 3 of the engine extends beyond the housing 5 (or front housing) to connect with the torsional vibration damper. This requires two considerations, one is how to reduce the friction between the crankshaft 3 and the housing 5 to reduce the engine friction losses (i.e. the power lost by overcoming the friction during engine operation), and the other is how to improve the sealing between the crankshaft 3 and the housing 5.

In the torsional vibration damper 1 of the present embodiment, the mechanical driving function is eliminated, and the accessory driving structure is not required to be installed or installed, so that the torsional vibration damper 1 can be installed inside the engine, that is, in the accommodating space 7 formed by the cylinder 2 and the housing 5 and located therebetween. In this way, the crankshaft 3 does not rub against the housing 5 during rotation, and the friction loss of the whole engine can be effectively reduced. At the same time, since the crankshaft 3 of the engine no longer passes through the housing 5, there is no longer a need to take into account the sealing problem between the crankshaft 3 and the housing 5. Therefore, the torsional vibration damper 1 is placed in the accommodating space 7 inside the engine, the design difficulty of the housing 5 can be effectively reduced, and meanwhile, the material cost of the engine can be reduced due to the fact that accessories and sealing accessories for reducing friction are omitted, so that the management and assembly of parts of the engine are optimized and improved.

In addition, since the crankshaft 3 does not extend out of the housing 5 any more, the engine using the torsional vibration damper 1 of the above embodiment has a shorter axial length of the crankshaft 3, compared to the electric or hybrid engine of the related art, so that the overall structure of the engine is more compact, the design flexibility is greater, and the arrangement of the engine on the whole vehicle is extremely advantageous. Meanwhile, the length of the free end (one end for connecting the torsional vibration damper 1) at the front part of the engine crankshaft 3 is shortened, and under the condition of equivalent engine torsional vibration and swing, the vibration and Noise generated at the front end of the crankshaft 3 are also greatly reduced, so that the radiation Noise at the front end of the crankshaft 3 is effectively improved, the Noise, the vibration and the related performance of the sound vibration roughness (Noise, vibration and Harshness, abbreviated as NVH performance) of the whole vehicle are improved, and the driving comfort is improved.

As shown in fig. 5, in some embodiments, the housing 5 is an integrally formed structure, and the accommodating space 7 is a closed space.

Since the crankshaft 3 no longer passes through the casing 5 in the engine of the present embodiment, the casing 5 no longer needs to be provided with a through seal attachment mounting hole, and therefore, in order to improve the sealing performance of the engine, the casing 5 may be integrally formed by casting, stamping, or the like. Therefore, the accommodating space 7 can be made into a closed space only by ensuring the tightness of the connecting position of the housing 5 and the engine cylinder body 2, which is beneficial to improving the whole sealing performance of the engine.

In some embodiments, rubber rings 1-3 are oil-resistant and high temperature-resistant rubber rings.

Alternatively, rubber rings 1-3 are hydrogenated nitrile rubber (Hydrogenated nitrile rubber, HNBR) rings.

Since the rubber ring 1-3 is located inside the engine in the engine of the present embodiment, its working environment is high in temperature and contacts with a medium such as engine oil, the rubber ring 1-3 is required to have high temperature resistance, oil resistance, and the like.

Based on the same inventive concept, in combination with the description of the torsional vibration damper 1 and the engine of the above embodiment, the present embodiment provides a vehicle having the corresponding technical effects of the torsional vibration damper 1 and the engine of the above embodiment, and will not be described herein.

A vehicle includes the torsional vibration damper 1 or the engine of the above embodiment.

It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, 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 process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Claims (11)

1. A torsional vibration damper, comprising: a fifth wheel and inertia ring; the inertia ring is sleeved on the connecting wheel, and the inertia ring covers the outer peripheral wall of the connecting wheel; the outer diameters of the radial sections of the inertia rings far away from the connecting wheel are equal;

the connecting wheel comprises a wheel disc and a rim connected to the outer edge of the wheel disc, a hub for connecting a crankshaft is arranged in the center of the wheel disc, and the wheel disc is close to one end part of the rim;

and a housing is arranged on one side of the inertia ring away from the hub.

2. A torsional vibration damper according to claim 1, characterized in that the inertia ring is fitted over the outside of the rim.

3. A torsional vibration damper according to claim 2, characterized in that a rubber ring is also provided between the rim and the inertia ring, the inner circumferential wall of the inertia ring facing the rim being provided with a bulge.

4. A torsional vibration damper according to claim 3, characterized in that the peripheral wall of the rim is provided with a recess matching the projection.

5. A torsional vibration damper according to claim 2, characterized in that the wheel disc is provided with at least two through holes uniformly spaced around the centre.

6. The torsional vibration damper of claim 5, wherein the through hole is a kidney-shaped hole.

7. An engine comprising a torsional vibration damper as claimed in any one of claims 1 to 6.

8. The engine of claim 7, further comprising a cylinder and a housing coupled to the cylinder, the housing and the cylinder defining a receiving space therebetween; the torsional vibration damper is located in the accommodating space.

9. The engine of claim 8, wherein the housing is of unitary construction and the receiving space is a closed space.

10. The engine of claim 7, wherein the torsional vibration damper further comprises a rubber ring, the rubber ring being an oil-resistant, high temperature-resistant rubber ring.

11. A vehicle comprising a torsional vibration damper as claimed in any one of claims 1 to 6 or an engine as claimed in any one of claims 7 to 10.