A rear mount damping system for a gearbox

Abstract

The present invention discloses a rear mount vibration damping system in the technical field of vehicle suspension systems, aiming to solve the problems of single vibration damping mode in the prior art, poor vibration damping and attenuation performance in the horizontal and rotational directions, and difficulty in controlling stiffness and damping. It includes a rotating rod, a return spring and a supporting side plate. The rotating rods are hinged through a pin shaft, and the pin shaft is fixedly connected to the gearbox through a connecting mechanism; one end of the rotating rod is hinged with a shock absorber, the shock absorber is hinged with a supporting side plate, and the other end of the rotating rod is hinged with a supporting slider, and the supporting slider is slidably connected to the other supporting side plate; The present invention is applicable to engineering vehicles, has multiple shock absorption modes, good buffer shock absorption effect, meets the use requirements of complex shock absorption, noise reduction and large impact load bearing under actual working conditions, and also has ideal stiffness and damping effects, making the vibration and impact load attenuation effects of the power assembly reach the best, improving driving comfort and vibration fatigue life.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle suspension systems, and specifically relates to a rear mount vibration damping system for a gearbox. Background Art

[0002] Engineering vehicles carry heavy loads and operate in harsh environments. They travel and work on uneven roads for a long time, which reduces the service life of their components to a certain extent. At the same time, the vibration isolation performance of the powertrain suspension system has an important impact on the ride comfort of the vehicle. Its quality directly affects the transmission of engine vibration to the vehicle body and affects the NVH performance of the whole vehicle. To solve the above problems, the traditional rear mount of the engineering vehicle gearbox generally adopts a layout structure where a transverse leaf spring is lapped on the left and right frames or a crossbeam is installed on the left and right frames through rubber mounts.

[0003] However, this layout structure has a single vibration damping mode, mainly for vertical vibration isolation. It is difficult for rubber mounts to attenuate large impacts, and they are prone to torsion or fracture failure, resulting in the steel sleeve of the rear mount connection point of the gearbox coming out or even the housing cracking. It cannot meet the actual requirements of vibration reduction, noise reduction and bearing large impact loads, and the actual application effect is not good. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a rear mount vibration damping system for a gearbox, which solves the problems of the current rear mount vibration damping system for a gearbox, such as a single vibration damping mode, poor vibration damping and attenuation performance for horizontal and rotational vibrations, and difficulty in controlling the stiffness and damping of the rubber mount system.

[0005] To solve the above technical problems, the present invention is implemented by the following technical solutions:

[0006] The present invention provides a rear mount vibration damping system for a gearbox, including: a rotating rod, a return spring and a supporting side plate. The rotating rods are hinged to each other through a pin shaft, and the pin shaft is fixedly connected to the gearbox through a connecting mechanism;

[0007] One end of the rotating rod is hinged with a shock absorber, the shock absorber is hinged with a supporting side plate, the other end of the rotating rod is hinged with a supporting slider, the supporting slider is slidably connected with the other supporting side plate, and the shock absorber, the supporting slider and the supporting side plate are symmetrically arranged about the central axis of the pin shaft;

[0008] When subjected to vibration shock, the rotating rod displaces and exerts a force on the return spring, and then is reset by the reaction force of the return spring.

[0009] Further, the supporting side plate is L-shaped, the shock absorber is hinged with the inner side wall of the supporting side plate, and the supporting slider is slidably connected with the inner bottom wall of the supporting side plate.

[0010] Furthermore, reinforcing ribs are provided on the supporting side plates.

[0011] Furthermore, a supporting slide table is provided on the supporting side plate. A supporting slide groove for the supporting slider to slide is provided in the supporting slide table. A through groove communicating with the supporting slide groove is provided on the supporting slide table. The rotating rod passes through the through groove and is hinged to the supporting slider in the supporting slide groove.

[0012] Furthermore, a boss slide rail is provided in the supporting slide groove. A guiding groove is provided on the supporting slider. The supporting slider can slide along the boss slide rail through the guiding groove.

[0013] Furthermore, a stop pad is provided in the supporting slide groove. The stop pad is used to limit the jumping of the supporting slider.

[0014] Furthermore, a fixing seat is provided on the supporting side plate. The shock absorber is hinged to the fixing seat to realize the hinged connection between the shock absorber and the supporting side plate.

[0015] Furthermore, overlapping grooves are provided on the adjacent side walls between the rotating rods. The two rotating rods are overlapped with each other through the overlapping grooves so that the two rotating rods are in the same plane.

[0016] Furthermore, a disc is integrally formed on the rotating rod. When the two rotating rods are overlapped with each other through the overlapping grooves, the overlapping groove on one rotating rod is buckled with the disc on the other rotating rod.

[0017] Furthermore, the connecting mechanism includes a connecting column and a connecting plate. One end of the connecting column is fixedly connected to the pin shaft, and the other end of the connecting column is fixedly connected to the connecting plate. The connecting plate can be installed and fixed on the gearbox.

[0018] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0019] 1. By converting the vertical vibration, horizontal vibration or rotational vibration received into the relative rotation between the rotating rods and the sliding between the supporting slider and the supporting side plate, and then enabling the shock absorber and the return spring to attenuate the vibration and impact load during the process of being stretched or compressed, the present invention can have multiple shock absorption modes, has a good buffer shock absorption effect, good applicability, and can meet the use requirements of complex shock absorption, noise reduction and large impact load bearing under actual working conditions;

[0020] 2. The present invention can adjust and match the spring stiffness and shock absorber damping, so that the gearbox has an ideal stiffness and damping effect when bearing large load impacts or vibrations, making the vibration and impact load attenuation effect of the power assembly reach the best, thereby improving the driving comfort and the vibration fatigue life of the gearbox housing.

[0021] 3. The present invention drives the support slider to slide in the support chute by passing the rotating rod through the through groove, enabling the support slider to slide stably. Then, the support slider is limited by the cooperation of the convex platform slide rail and the guiding groove, thereby preventing the support slider from swinging left and right and extending its service life.

[0022] 4. The present invention overlaps the grooves to overlap and place two rotating rods in the same plane, which can reduce the torque on the pin shaft. Then, the overlapping grooves are engaged with the disc, enabling the two rotating rods to support each other, thereby improving the maximum impact resistance and ensuring the overall stability, with good actual use effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0024] Figure 1 is a schematic structural diagram of a rear suspension damping system of a gearbox provided by an embodiment of the present invention;

[0025] Figure 2 is Figure 1 a schematic structural diagram of the support slide of the rear suspension damping system of the gearbox shown;

[0026] Figure 3 is Figure 1 a schematic structural diagram of the rotating rod of the rear suspension damping system of the gearbox shown;

[0027] Figure 4 is Figure 1 a schematic structural diagram when the rotating rods of the rear suspension damping system of the gearbox shown overlap each other;

[0028] Figure 5 is Figure 1 a schematic structural diagram of the connecting mechanism of the rear suspension damping system of the gearbox shown;

[0029] In the figures: 1, rotating rod; 11, overlapping groove; 12, disc; 2, return spring; 3, support side plate; 4, pin shaft; 5, connecting mechanism; 51, connecting column; 52, connecting plate; 6, shock absorber; 7, support slider; 71, guiding groove; 8, support slide; 81, support chute; 82, through groove; 83, convex platform slide rail; 84, stop pad; 9, fixed seat. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The present invention will be further described below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0031] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0032] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0033] Embodiment 1:

[0034] As Figure 1 shown, the embodiment of the present invention provides a rear suspension damping system for a gearbox, including: a rotating rod 1, a return spring 2, and a support side plate 3. The rotating rods 1 are hinged to each other through a pin shaft 4, and the pin shaft 4 is fixedly connected to the gearbox through a connecting mechanism 5; one end of the rotating rod 1 is hinged to a shock absorber 6, the shock absorber 6 is hinged to a support side plate 3, the other end of the rotating rod 1 is hinged to a support slider 7, the support slider 7 is slidably connected to the other support side plate 3, and the shock absorber 6, the support slider 7, and the support side plate 3 are symmetrically arranged about the central axis of the pin shaft 4; when subjected to vibration shock, the rotating rod 1 displaces and applies a force to the return spring 2, and then the return is realized through the reaction force of the return spring 2.

[0035] During installation, the support side plates 3 are respectively fixedly installed on both sides inside the vehicle frame, and then the pin shaft 4 is fixedly connected to the gearbox arranged inside the vehicle frame through the connecting mechanism 5. At this time, the rear suspension damping system of the gearbox starts to support the gearbox.

[0036] It should be noted that the reset spring 2 is preferably arranged between the two rotating rods 1, but it can also be connected to one end of the rotating rod 1 and the other end to the vehicle frame or the supporting side plate 3; as long as it can use the pulling force or tension to push the rotating rod 1 to complete the reset, specific limitations are not made here, and the layout form can be adjusted accordingly according to the actual situation.

[0037] It can be understood that the vertical vibration mainly comes from the impact caused by the uneven road surface during driving, the horizontal vibration mainly comes from the centrifugal force during vehicle acceleration, deceleration or turning, and the rotational vibration mainly comes from the torque applied by the engine to the transmission.

[0038] When the transmission is subjected to vertical vibration, horizontal vibration or rotational vibration, the transmission rear mount damping system of the present invention can convert them into relative rotation between the rotating rods 1 and sliding between the supporting slider 7 and the supporting side plate 3, and cause the reset spring 2 and the shock absorber 6 to be stretched or compressed; then under the reaction force of the reset spring 2, the transmission rear mount damping system is reset. During this process, the shock absorber 6 attenuates the vibration and impact load when being stretched or compressed, playing a damping role.

[0039] The present invention can have multiple damping modes in the above manner, has good buffering and damping effects on vertical vibration, horizontal vibration or rotational vibration, has good applicability, and can meet the use requirements of complex vibration reduction, noise reduction and large impact load bearing under actual working conditions.

[0040] In addition, the present invention can adjust and match the spring stiffness and shock absorber damping of the mount damping system, so that when the transmission bears large load impacts or vibrations, it has ideal stiffness and damping effects, and another achieves the best attenuation effect of the vibration and impact load of the powertrain, thereby improving driving comfort and the vibration fatigue life of the transmission housing. However, due to production process factors, it is difficult to adjust the rubber mount of the traditional structure, so it does not have this effect.

[0041] In this embodiment, as Figure 1 shown, to improve the structural strength, the supporting side plate 3 is L-shaped, the shock absorber 6 is hinged to the inner side wall of the supporting side plate 3, the supporting slider 7 is slidably connected to the inner bottom wall of the supporting side plate 3, and the supporting side plate 3 is provided with reinforcing ribs.

[0042] Specifically, the setting method of the supporting slider 7 slidably connected to the inner bottom wall of the supporting side plate 3, through force analysis, it can be known that it can support the mount damping system and share most of the bearing pressure, avoiding the situation that the reset spring 2 bears too much pressure and causes fracture, improving the structural strength and extending the service life. The reinforcing ribs are used to improve the structural strength of the supporting side plate 3 and reduce stress concentration. Preferably, they are arranged on both sides of the supporting side plate 3, but no limitations are made on this, and they can also be in other positions.

[0043] In this embodiment, as Figure 2 shown, to improve the sliding stability of the support slider 7, a support slideway 8 is provided on the support side plate 3. A support chute 81 for the support slider 7 to slide is provided in the support slideway 8. A through groove 82 communicating with the support chute 81 is provided on the support slideway 8. The rotating rod 1 passes through the through groove 82 and is hinged to the support slider 7 in the support chute 81.

[0044] During use, the rotating rod 1 drives the support slider 7 to slide in the support chute 81 through the through groove 82 of the support slideway 8. The support chute 81 plays a role of limiting and guiding, enabling the support slider 7 to slide stably.

[0045] In this embodiment, a convex platform slide rail 83 is provided in the support chute 81, and a guiding groove 71 is provided on the support slider 7. The support slider 7 can slide along the convex platform slide rail 83 through the guiding groove 71.

[0046] Specifically, as Figure 2 shown, the convex platform slide rail 83 is preferably an isosceles trapezoid and is provided on the inner bottom wall of the support chute 81, while the guiding groove 71 is an isosceles trapezoid groove matching it. When the support slider 7 swings left and right in the support chute 81, a deflecting force will be generated on the hinge point between the rotating rod 1 and the support slider 7. After a long time, stress fatigue will occur, resulting in fracture and malfunction. Through the cooperation of the convex platform slide rail 83 and the guiding groove 71, further limitation of the support slider 7 can be achieved, thereby preventing the support slider 7 from swinging left and right in the support chute 81 and extending the service life.

[0047] In this embodiment, a stop pad 84 is provided in the support chute 81, and the stop pad 84 is used to limit the bouncing of the support slider 7.

[0048] Specifically, as Figure 2 shown, the stop pad 84 is preferably provided on both sides of the inner top wall of the support chute 81, made of a flexible material such as rubber, and there is a gap of 1 mm - 3 mm between it and the support slider 7. This can limit the bouncing of the support slider 7 under actual working conditions, thereby reducing the resulting noise and improving the driving effect.

[0049] In this embodiment, a fixed seat 9 is provided on the support side plate 3, and the shock absorber 6 is hinged to the fixed seat 9 to achieve the hinging of the shock absorber 6 and the support side plate 3.

[0050] Specifically, one end of the shock absorber 6 is hinged to the fixed seat 9, and the fixed seat 9 is fixedly connected to the support side plate 3 by bolts or rivets. This is convenient for installation on the premise of ensuring stability and improves production efficiency.

[0051] In this embodiment, the connecting mechanism 5 includes a connecting column 51 and a connecting plate 52. One end of the connecting column 51 is fixedly connected to the pin shaft 4, and the other end of the connecting column 51 is fixedly connected to the connecting plate 52. The connecting plate 52 can be installed and fixed on the gearbox.

[0052] During installation, the connecting plate 52 contacts the upper plane of the gearbox and is fixedly connected to the gearbox through bolts or other components with the same function. At this time, the pin shaft 4 is fixedly connected to the gearbox through the connecting column 51 and the connecting plate 52, which improves the stability of the connection and is convenient for installation, and the use effect is better.

[0053] Embodiment Two:

[0054] As Figure 3 shown, this embodiment provides a rear mount damping system for a gearbox. The difference from Embodiment One is that overlapping grooves 11 are provided on the adjacent side walls between the rotating rods 1. The two rotating rods 1 are overlapped with each other through the overlapping grooves 11 so that the two rotating rods 1 are in the same plane.

[0055] Specifically, the pin shaft 4 penetrates through the rotating rod 1 at the center of the overlapping groove 11, so that the rotating rod 1 can be overlapped with each other while being hinged to the pin shaft 4; the two rotating rods 1 are in the same plane, which can reduce the torque received by the pin shaft 4 and improve the maximum impact resistance, thereby enhancing the overall stability of the mount damping system.

[0056] In this embodiment, as Figure 4 shown, a disc 12 is integrally formed on the rotating rod 1. When the two rotating rods 1 are overlapped with each other through the overlapping grooves 11, the overlapping groove 11 on one rotating rod 1 is buckled with the disc 12 on the other rotating rod 1.

[0057] Specifically, through the engagement of the overlapping groove 11 and the disc 12, the two rotating rods 1 can support each other. Thus, when one of the rotating rods 1 is subjected to excessive force, the other rotating rod 1 can share part of the acting force for the pin shaft 4, avoiding the situation that the stress is too concentrated and causing the pin shaft 4 to break, improving the impact resistance of the mount damping system, and the actual use effect is good.

[0058] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A rear mount damping system for a gearbox, characterized in that, it includes: a rotating rod (1), a return spring (2) and a supporting side plate (3), the rotating rods (1) are hinged to each other through a pin shaft (4), and the pin shaft (4) is fixedly connected to the gearbox through a connecting mechanism (5); one end of the rotating rod (1) is hinged with a shock absorber (6), the shock absorber (6) is hinged to a supporting side plate (3), the other end of the rotating rod (1) is hinged with a supporting slider (7), the supporting slider (7) is slidably connected to the other supporting side plate (3), and the shock absorber (6), the supporting slider (7) and the supporting side plate (3) are symmetrically arranged about the central axis of the pin shaft (4); when subjected to vibration impact, the rotating rod (1) displaces and applies a force to the return spring (2), and then is reset by the reaction force of the return spring (2); wherein, the supporting side plate (3) is L-shaped, the shock absorber (6) is hinged to the inner side wall of the supporting side plate (3), and the supporting slider (7) is slidably connected to the inner bottom wall of the supporting side plate (3); a supporting slide table (8) is provided on the supporting side plate (3), a supporting chute (81) for the supporting slider (7) to slide is provided in the supporting slide table (8), a through groove (82) communicating with the supporting chute (81) is provided on the supporting slide table (8), and the rotating rod (1) passes through the through groove (82) and is hinged to the supporting slider (7) in the supporting chute (81); a convex rail (83) is provided in the supporting chute (81), a guiding groove (71) is provided on the supporting slider (7), and the supporting slider (7) can slide along the convex rail (83) through the guiding groove (71).

2. The rear mount damping system for a gearbox according to claim 1, characterized in that, the supporting side plate (3) is provided with reinforcing ribs.

3. The rear mount damping system for a gearbox according to claim 1, characterized in that, a stop pad (84) is provided in the supporting chute (81), and the stop pad (84) is used to limit the bouncing of the supporting slider (7).

4. The rear mount damping system for a gearbox according to claim 1, characterized in that, a fixing seat (9) is provided on the supporting side plate (3), and the shock absorber (6) is hinged to the fixing seat (9) to realize the hinging of the shock absorber (6) and the supporting side plate (3).

5. The rear mount damping system for a gearbox according to claim 1, characterized in that, overlapping grooves (11) are provided on the adjacent side walls between the rotating rods (1), and the two rotating rods (1) are overlapped with each other through the overlapping grooves (11) so that the two rotating rods (1) are in the same plane.

6. The rear mount damping system for a gearbox according to claim 5, characterized in that, a disc (12) is integrally formed on the rotating rod (1), when the two rotating rods (1) are overlapped with each other through the overlapping grooves (11), the overlapping groove (11) on one rotating rod (1) is buckled with the disc (12) on the other rotating rod (1).

7. The rear mount damping system for a gearbox according to any one of claims 1-6, characterized in that, The connecting mechanism (5) includes a connecting column (51) and a connecting plate (52). One end of the connecting column (51) is fixedly connected to the pin shaft (4), and the other end of the connecting column (51) is fixedly connected to the connecting plate (52). The connecting plate (52) can be installed and fixed on the gearbox.

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