An internal combustion engine dual mass flywheel with long life and low cost

Abstract

The utility model discloses a kind of double-mass flywheel of internal combustion engine with long life and low cost, including first mass and second mass, first mass and the side of second mass symmetrical with each other are provided with several groups linear spring groove along circumference, the both ends of linear spring groove are provided with spring support structure, spring guide sleeve and spring guide shaft are respectively arranged on both ends spring support structure, spring guide sleeve is sleeved on the outside of spring guide shaft, spring is sleeved on the outside surface of spring guide sleeve and spring guide shaft, first mass and second mass are connected by bearing and bearing snap spring between. The utility model replaces arc spring with linear spring, thereby eliminating the sliding friction between arc spring and other parts, in addition, the connecting disc and flywheel shell are removed on overall structure, the production manufacturing cost of double-mass flywheel can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of reciprocating piston internal combustion engine components, specifically to a dual-mass flywheel for internal combustion engines with long service life and low cost. Background Technology

[0002] The dual-mass flywheel in a reciprocating piston internal combustion engine is a key vibration damping and isolation device, primarily used to improve the smoothness of the engine and transmission system, reduce noise, and enhance overall power generation quality and driving experience. Its core functions are as follows:

[0003] 1. Effective isolation of engine crankshaft torsional vibration: This is its core function. A traditional flywheel is a single unit; the pulsating torque and vibration generated by the engine's periodic operation are directly transmitted to the generator (e.g., diesel generator sets) or transmission (e.g., automotive powertrain) and the entire drivetrain. The dual-mass flywheel, through its special structure, can almost completely filter out the torsional vibration of the engine crankshaft, especially in the low-speed range, significantly reducing noise and vibration. By attenuating the vibration transmitted from the engine to the drive system, the dual-mass flywheel effectively reduces the vibration and noise generated by components such as the generator, transmission, and chassis, making the engine run more smoothly and quietly. This is particularly important for diesel engines, which experience greater vibration, making them comparable to gasoline engines.

[0004] 2. Allows the engine to run smoothly at lower speeds: Because the resonance speed can be reduced to below the engine idle speed (for example, from 1300 rpm to 300 rpm), the engine can work stably in a lower speed range (including low idle speed), avoiding resonance in the operating speed range, which makes it possible to reduce fuel consumption and noise.

[0005] 3. Reduced crankshaft load: The primary mass of the dual-mass flywheel is smaller than that of the traditional integral flywheel, thus reducing the inertial torque and dynamic load applied to the crankshaft, which helps protect the crankshaft and extend its life.

[0006] However, as Figure 1 As shown, a traditional dual-mass flywheel includes a flywheel housing e, a first mass a, a second mass b, an elastic element c (arc spring), a bearing f, and a connecting disc d. The arc spring contacts other parts in multiple directions, and the external wear of the arc spring will be more severe after the dual-mass flywheel has been working for a long time.

[0007] Chinese utility model patent No. 2023217955090 discloses a dual-mass flywheel elastic element with a sidewall rolling support, including an arc spring (1), a spring sleeve (2), a lower rolling element support (3), a spherical rolling element (4), an upper rolling element support (5), and a screw (6). The arc spring (1) passes through the through hole of the spring sleeve (2) and is welded together. The lower rolling element support (3) is welded to the circumference of the spring sleeve (2). The upper rolling element support (5) is fixed above the lower rolling element support (3) by the screw (6). The spherical rolling element (4) is placed between the lower rolling element support (3) and the upper rolling element support (5). The above patent reduces spring wear by replacing the rolling friction between the arc spring and other parts with sliding friction. However, due to the characteristics of the arc spring's structure, the arc spring in the above utility model still cannot avoid sliding friction with other parts, and the wear problem is still relatively serious. Utility Model Content

[0008] The purpose of this invention is to propose a dual-mass flywheel for internal combustion engines with long life and low cost, in order to overcome the above-mentioned shortcomings in the prior art.

[0009] To achieve the above-mentioned technical objectives, the technical solution of this utility model is implemented as follows:

[0010] A dual-mass flywheel for internal combustion engines with long service life and low cost includes a first mass and a second mass. Several sets of linear spring grooves are symmetrically arranged circumferentially on the opposite side of the first mass and the second mass. Spring support structures are provided at both ends of the linear spring grooves. Spring guide sleeves and spring guide shafts are respectively provided on the spring support structures at both ends. The spring guide sleeves are sleeved on the outside of the spring guide shafts. Springs are sleeved on the outer surfaces of the spring guide sleeves and the spring guide shafts. The first mass and the second mass are connected by bearings and bearing retaining rings.

[0011] Preferably, the spring support structure includes a spherical support seat integrally formed with both ends of the linear spring groove. The spring guide sleeve is provided in the spherical support seat through an outer support of the guide sleeve. The outer support of the guide sleeve includes a first spring limiting protrusion integrally formed on the side of the spring guide sleeve and an outer circle support of the guide sleeve adapted to the spherical support seat. The spring guide shaft is provided in the spherical support seat through an outer support of the guide shaft. The outer support of the guide shaft includes a second spring limiting protrusion integrally formed on the side of the spring guide shaft and an outer circle support of the guide shaft adapted to the spherical support seat.

[0012] The beneficial effects of this utility model are as follows: This utility model uses a linear spring to replace the arc spring, thereby eliminating the sliding friction between the arc spring and other parts. In addition, the overall structure eliminates the connecting plate and flywheel housing, which can effectively reduce the production and manufacturing cost of the dual-mass flywheel. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the exploded structure of an existing dual-mass flywheel;

[0014] Figure 2 This is a schematic diagram of the structure of the dual-mass flywheel described in an embodiment of the present invention;

[0015] Figure 3 This is a cross-sectional structural schematic diagram of the dual-mass flywheel described in an embodiment of the present invention;

[0016] Figure 4 This is a structural schematic diagram of the first mass in an embodiment of the present invention;

[0017] Figure 5 This is a structural schematic diagram of the second mass in an embodiment of the present invention;

[0018] Figure 6 This is a schematic diagram of the installation structure of the spring described in an embodiment of this utility model;

[0019] Figure 7 This is a cross-sectional installation structure diagram of the spring described in an embodiment of this utility model.

[0020] Figure 8 This is a schematic diagram of the structure of the spring on the first mass in this embodiment of the present invention when it is compressed.

[0021] As shown in the figure:

[0022] 1-First mass; 2-Second mass; 3-Straight spring groove; 4-Spring guide sleeve; 5-Spring guide shaft; 6-Spring; 7-Bearing; 8-Bearing retaining ring; 9-Spherical support seat; 10-First spring limiting protrusion; 11-Guide sleeve outer circle support; 12-Second spring limiting protrusion; 13-Guide shaft outer circle support. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0024] like Figure 2-7As shown in the embodiment of this utility model, a dual-mass flywheel for internal combustion engines with long life and low cost includes a first mass 1 and a second mass 2. Two sets of linear spring grooves 3 are symmetrically arranged circumferentially on opposite sides of the first mass 1 and the second mass 2. Spring support structures are provided at both ends of the linear spring grooves 3. Each spring support structure includes a spherical support seat 9 integrally formed with both ends of the linear spring grooves 3. Spring guide sleeves 4 and spring guide shafts 5 are respectively provided on the spring support structures at both ends. The spring guide sleeves 4 are supported by an outer support within the spherical support seat 9. The outer support includes a first spring guide sleeve 4 integrally formed on the side of the spring guide sleeve 4. A spring limiting protrusion 10 and a guide sleeve outer circle support 11 adapted to the spherical support seat 9 are constituted. The spring guide shaft 5 is provided in the spherical support seat 9 through the guide shaft outer support. The guide shaft outer support includes a second spring limiting protrusion 12 integrally provided on the side of the spring guide shaft 5 and a guide shaft outer circle support 13 adapted to the spherical support seat 9. The spring guide sleeve 4 is sleeved on the outside of the spring guide shaft 5. The outer surfaces of the spring guide sleeve 4 and the spring guide shaft 5 are sleeved with a spring 6. The two ends of the spring 6 are restricted by the first spring limiting protrusion 10 and the second spring limiting protrusion 12. The first mass 1 and the second mass 2 are connected by a bearing 7 and a bearing retaining ring 8.

[0025] The principle of this utility model:

[0026] like Figure 8 As shown, during the operation of the dual-mass flywheel, when torsional vibration occurs between the first mass 1 and the second mass 2, the linear spring groove 3 on the first mass 1 (shown by the solid line in the figure) and the linear spring groove 3 on the second mass 2 (shown by the dashed line in the figure) become misaligned, compressing the spring 6 and significantly reducing noise and vibration. Since the spring 6 moves with the extension and retraction between the spring guide sleeve 4 and the spring guide shaft 5, it will not rub against other components, thus completely eliminating sliding friction loss and improving its service life.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dual-mass flywheel for internal combustion engines with long lifespan and low cost, comprising a first mass (1) and a second mass (2), characterized in that, Several sets of straight spring grooves (3) are symmetrically arranged along the circumferential direction on the side facing the first mass (1) and the second mass (2). Spring support structures are provided at both ends of the straight spring grooves (3). Spring guide sleeves (4) and spring guide shafts (5) are respectively provided on the spring support structures at both ends. The spring guide sleeves (4) are sleeved on the outside of the spring guide shafts (5). Springs (6) are sleeved on the outer sides of the spring guide sleeves (4) and the spring guide shafts (5). The first mass (1) and the second mass (2) are connected by bearings (7) and bearing retaining rings (8).

2. The dual-mass flywheel for internal combustion engines with long lifespan and low cost according to claim 1, characterized in that, The spring support structure includes a spherical support seat (9) integrally formed with both ends of the straight spring groove (3). The spring guide sleeve (4) is provided in the spherical support seat (9) through the outer support of the guide sleeve. The outer support of the guide sleeve consists of a first spring limiting protrusion (10) integrally formed on the side of the spring guide sleeve (4) and a guide sleeve outer circle support (11) adapted to the spherical support seat (9). The spring guide shaft (5) is provided in the spherical support seat (9) through the outer support of the guide shaft. The outer support of the guide shaft consists of a second spring limiting protrusion (12) integrally formed on the side of the spring guide shaft (5) and a guide shaft outer circle support (13) adapted to the spherical support seat (9).

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