Gearbox suspension system

Abstract

The invention discloses a gearbox suspension system which comprises a cross beam assembly and a suspension assembly, the cross beam assembly comprises a cross beam body, and the cross beam body comprises a first cross beam, a second cross beam, a connecting plate arranged between the two cross beams and two side plates connected with the two cross beams. Meanwhile, the cross beam assembly is rigidly connected with the frame, so that the torsional rigidity of the area of the frame is increased; the suspension assembly is detachably and flexibly connected with the gearbox, the suspension assembly is also detachably connected with the cross beam assembly, the resonance amplitude of the gearbox and the cross beam assembly can be reduced through the connection mode, and then the vibration comfort of the whole vehicle is improved; in addition, the mounting plate used for mounting the suspension assembly in the cross beam assembly is a bent steel plate, compared with a stamping plate, the rigidity of the mounting surface of the suspension assembly is improved, the vibration isolation performance is further improved, and finally the NVH performance of the whole vehicle is improved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile suspension, and in particular to a gearbox suspension system. Background Art

[0002] The gearbox suspension system is a buffer device installed between the gearbox and the vehicle frame. It has the following functions: (1) supporting the weight of the gearbox; (2) suppressing the dynamic displacement of the gearbox caused by external forces; (3) preventing the transmission of vibration from the gearbox to the vehicle frame. Therefore, the effect of the gearbox suspension system design directly affects the vibration transmission between the gearbox and the vehicle frame and the reliability of the gearbox, which in turn affects the NVH (noise, vibration, harshness) performance of the vehicle.

[0003] The gearbox suspension system mainly includes suspension pads and suspension beams. The suspension pads can attenuate the mutual vibration between the gearbox and the frame, and play a good vibration isolation role for the running vehicle. The main function of the suspension beam is to bear the load near the engine compartment and at the same time improve the torsional stiffness of the frame. Its good stiffness can greatly improve the NVH performance of the vehicle.

[0004] At present, most suspension beams are formed by stamping. Although the mass production cost of stamped suspension beams is low, there may be problems such as inconsistent thickness and cracks caused by stress concentration during stamping, which will lead to insufficient local stiffness of the suspension beam and poor vibration isolation ability, and then cause obvious engine idle jitter and other problems, which will make it difficult to control the NVH performance of the whole vehicle and easily cause the suspension beam to break and fail.

[0005] For example, the utility model patent with the authorization announcement number CN 203766507 U discloses a gearbox suspension beam and a gearbox suspension system having the beam. The gearbox suspension beam comprises: two connecting parts for connecting to the longitudinal beams on both sides of the frame; a curved surface connected to the fillets of the two connecting parts, the curved surface being formed by connecting a section of a horizontal surface and two sections of inclined fillets. The gearbox suspension beam adopts a curved surface structure in many places, which can enhance the anti-twisting performance of the suspension beam to a certain extent, but the stamping design makes the vibration isolation ability of the suspension beam poor. Summary of the invention

[0006] In order to solve the above problems, the present invention provides a gearbox suspension system, which can improve the vibration isolation performance while improving the stiffness and anti-twisting performance of the crossbeam.

[0007] The technical solution of the present invention to solve the above problems is as follows:

[0008] A gearbox suspension system includes a crossbeam assembly; the crossbeam assembly includes a crossbeam body, the crossbeam body includes: a first crossbeam and a second crossbeam having a horizontal portion and two inclined portions, the inclined portions are connected to the rounded corners at both ends of the horizontal portion, and the crossbeam body also includes: a connecting plate arranged between the first crossbeam and the second crossbeam, and a side plate connected to the inclined portions.

[0009] Preferably, the number of the connecting plates and the side plates is two.

[0010] Preferably, the first crossbeam and the second crossbeam are both hollow tubes; the connecting plate is fixedly connected to the inclined portion of the first crossbeam and the inclined portion of the second crossbeam.

[0011] Preferably, the mounting plate is a bent steel plate.

[0012] Preferably, the side plate comprises a vertical portion and a bent portion which are integrally connected, the bent portion is fixedly connected to the inclined portion, and the vertical portion is provided with a plurality of beam mounting holes.

[0013] Preferably, the number of the crossbeam mounting holes is at least 2.

[0014] Preferably, the crossbeam assembly also includes a connecting member connected to the side plate; the connecting member includes a vertical surface provided with a crossbeam auxiliary mounting hole and a horizontal surface connected to the vertical surface; the crossbeam auxiliary mounting hole corresponds to the crossbeam mounting hole.

[0015] Preferably, reinforcing ribs are provided between the horizontal surface and the vertical surface.

[0016] Preferably, the number of the auxiliary mounting holes of the crossbeam is at least 2.

[0017] Preferably, the beam assembly also includes a supporting portion arranged above the first horizontal portion of the beam and the second horizontal portion of the beam; the supporting portion includes a supporting frame fixedly connected to the first horizontal portion of the beam and the second horizontal portion of the beam, and a mounting plate arranged above the supporting frame.

[0018] Preferably, the support brackets are two hollow tubes, including a horizontal portion and two inclined portions connected to the rounded corners at both ends of the horizontal portion; the diameter of the support brackets is not greater than the diameters of the first beam and the second beam.

[0019] Preferably, suspension component mounting holes are provided on both left and right sides of the mounting plate; and a weight-reducing hole is provided in the middle of the mounting plate.

[0020] Preferably, the mounting plate is a bent steel plate.

[0021] Preferably, the gearbox suspension system also includes a suspension component arranged above the mounting plate; the suspension component includes a suspension frame, a rubber pad integrally connected to the suspension frame, and a support frame arranged above the rubber pad; the suspension frame is provided with a suspension component auxiliary mounting hole corresponding to the suspension component mounting hole.

[0022] Preferably, a plurality of gearbox mounting holes are provided on both sides of the support frame; a slot hole is provided in the middle of the support frame; and the support frame and the rubber pad are detachably connected via fasteners inserted through the slot hole and the rubber pad.

[0023] Preferably, the number of the gearbox mounting holes is at least 2.

[0024] The present invention has the following beneficial effects:

[0025] (1) The gearbox suspension system of the present invention comprises a crossbeam body including a first crossbeam, a second crossbeam, a connecting plate disposed between the two crossbeams, and two side plates connected to the two crossbeams. Compared with the design of stamping, the crossbeam rigidity and anti-twisting performance are improved. At the same time, the crossbeam assembly is rigidly connected to the frame, thereby increasing the torsional rigidity of the frame in this area.

[0026] (2) The gearbox suspension system of the present invention has a detachable flexible connection between the suspension assembly and the gearbox, and a detachable connection between the suspension assembly and the crossbeam assembly. This connection method can reduce the resonance amplitude between the gearbox and the crossbeam assembly, thereby improving the vibration comfort of the entire vehicle;

[0027] (3) The mounting plate used to install the suspension component in the crossbeam assembly is a bent steel plate. Compared with the stamped plate, it improves the stiffness of the mounting surface of the suspension component, thereby improving the vibration isolation performance and ultimately improving the NVH performance of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a gearbox suspension system disclosed in an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the beam assembly disclosed in an embodiment of the present invention:

[0030] Figure 3 A schematic diagram of the structure of a connecting piece disclosed in an embodiment of the present invention;

[0031] Figure 4 A schematic diagram of the structure of a suspension assembly disclosed in an embodiment of the present invention;

[0032] In the figure: 11-first crossbeam, 12-second crossbeam, 13-connecting plate, 14-side plate, 141-crossbeam mounting hole, 15-connecting piece, 151-crossbeam auxiliary mounting hole, 152-reinforcement rib, 21-supporting bracket, 22-mounting plate, 221-suspension component mounting hole, 222-weight reduction hole, 31-suspension frame, 311-suspension component auxiliary mounting hole, 32-rubber pad, 33-support frame, 331-gearbox mounting hole, 332-slot hole, 4-frame. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] A gearbox suspension system is arranged between the gearbox and the frame 4, such as Figure 1 As shown, it includes a crossbeam assembly and a suspension assembly, wherein the crossbeam assembly is connected to the frame 4, and the suspension assembly is installed on the crossbeam assembly and connected to the gearbox.

[0035] The beam assembly includes a beam body, such as Figure 2 As shown, the crossbeam body includes a first crossbeam 11 and a second crossbeam 12. Both crossbeams are hollow tubes. They are the same in size, structure and shape, and each includes a horizontal portion and two inclined portions. The inclined portions are arranged at both ends of the horizontal portion and connected to the rounded corners of the horizontal portion, and the two inclined portions are symmetrically arranged relative to the center line of the horizontal portion. The horizontal portion and the inclined portion are integrally connected, so that the first crossbeam 11 and the second crossbeam 12 are both roughly U-shaped, and the openings face upward. The first crossbeam 11 and the second crossbeam 12 are arranged in parallel, and the horizontal portions of the two crossbeams are in the same plane. Two connecting plates 13 are welded and fixed between the inclined portions of the two crossbeams. The connecting plates 13 are bent steel plates that match the bending angles of the rounded corners of the two crossbeams. The arrangement of the connecting plates 13 can improve the torsional rigidity of the crossbeam body.

[0036] The crossbeam body also includes two side plates 14 of the same size, structure and shape, and the two side plates 14 are fixedly connected to the first crossbeam 11 and the second crossbeam 12. The side plates 14 are stamped and include a vertical portion and a bent portion connected in one piece, wherein the bent portion is fixedly connected to the inclined portions of the two crossbeams by welding. A plurality of crossbeam mounting holes 141 are provided on the vertical portion, and in this embodiment, the number of the crossbeam mounting holes 141 is 3.

[0037] The crossbeam assembly also includes two connectors 15 of the same size, structure and shape, which are used to connect the crossbeam body to the frame 4. The connector 15 is L-shaped, including a horizontal surface and a vertical surface, and a plurality of crossbeam auxiliary mounting holes 151 are arranged on the vertical surface. In this embodiment, the number of the crossbeam auxiliary mounting holes 151 is also 3. The vertical surface of the connector 15 is detachably connected to the vertical portion of the side plate 14, and the crossbeam auxiliary mounting holes 151 correspond to the crossbeam mounting holes 141 and are fixed by bolts. The horizontal surface of the connector 15 is a welding surface, which is fixedly connected to the lower end surface of the longitudinal beam of the frame 4 by welding. After the connection, the top surface height of the crossbeam body is lower than the top surface height of the longitudinal beam of the frame 4. In addition, a plurality of reinforcing ribs 152 are evenly distributed between the horizontal surface and the vertical surface to improve the connection strength between the horizontal surface and the vertical surface.

[0038] The crossbeam assembly also includes a supporting portion for supporting the suspension assembly. The supporting portion includes a support frame 21, and the support frame 21 includes two hollow tubes, and the two hollow tubes are the same in size, structure and shape. The support frame 21 includes a horizontal portion and two inclined portions. The inclined portions are arranged at both ends of the horizontal portion and are connected to the rounded corners of the horizontal portion, and the two inclined portions are symmetrically arranged relative to the center line of the horizontal portion. The horizontal portion and the inclined portion are integrally connected, so that the support frame 21 is roughly U-shaped, and the opening faces downward. The hollow tubes constituting the support frame 21 are respectively arranged above the first crossbeam 11 and the second crossbeam 12, and the inclined portions of the support frame 21 are respectively fixedly connected to the horizontal portions of the two crossbeams by welding, and the diameter of the hollow tubes constituting the support frame 21 is smaller than the diameter of the first crossbeam 11 and the second crossbeam 12.

[0039] The supporting part also includes a mounting plate 22 for mounting a suspension component. The mounting plate 22 is welded above the horizontal portion of the support bracket 21, and includes a horizontal portion and a bent portion. The horizontal portion of the mounting plate 22 is fitted with the horizontal portion of the support bracket 21, and the bent portion is fitted with the inclined portion of the support bracket 21. A suspension component mounting hole 221 is provided on each of the left and right sides of the horizontal portion of the mounting plate 22 for mounting the suspension component. A weight reduction hole 222 is provided between the two suspension component mounting holes 221, which further reduces its own weight while ensuring stability, thereby achieving lightweight. The mounting plate 22 is a bent steel plate, which improves the rigidity and reliability of the mounting plate 22 compared to a stamped plate.

[0040] The suspension assembly is installed above the mounting plate 22, and is used to install the gearbox and play a role in vibration isolation. It includes a support frame 33, a suspension frame 31, and a rubber pad 32. Suspension assembly auxiliary mounting holes 311 are provided on both sides of the suspension frame 31. The suspension assembly auxiliary mounting holes 311 correspond to the suspension assembly mounting holes 221 of the mounting plate 22, so that the suspension frame 31 can be detachably mounted above the mounting plate 22. In this embodiment, the suspension assembly auxiliary mounting holes 311 are bolt holes, and the suspension frame 31 and the mounting plate 22 are detachably connected by bolts. The detachable and flexible connection between the mounting plate 22 and the suspension frame 31 can prevent the vibration generated by the gearbox connected to the suspension assembly from being transmitted to the crossbeam body, thereby improving the vibration isolation capability.

[0041] The rubber pad 32 and the suspension frame 31 are vulcanized to form an integrated structure, which effectively ensures vibration isolation. A rubber pad hole is vertically arranged in the middle of the rubber pad 32. The support frame 33 is arranged above the rubber pad 32. The support frame 33 includes a horizontal portion and two folded portions folded upward. A slot hole 332 is arranged in the middle of the horizontal portion. The slot hole 332 is coaxial with the rubber pad hole. The support frame 33 and the rubber pad 32 can be connected by long bolts. Two gearbox mounting holes 331 are arranged on each folded portion to facilitate the installation and fixation of the gearbox.

[0042] In the gearbox suspension system of the present invention, the crossbeam assembly is welded to the frame 4 through a connector 15, that is, the crossbeam assembly and the frame 4 are rigidly connected, so the crossbeam assembly can be basically equivalent to the frame crossbeam, which can increase the torsional stiffness of the frame 4 in this area; at the same time, the detachable connection between the gearbox and the suspension assembly, that is, the gearbox and the suspension assembly are flexibly connected, can effectively isolate the vibration of the gearbox, avoid the vibration from being transmitted to the frame 4 to the greatest extent, and ensure the NVH (noise, vibration, acoustic harshness) performance of the whole vehicle.

Claims

1. A gearbox suspension system, characterized in that: The invention comprises a crossbeam assembly; the crossbeam assembly comprises a crossbeam body, the crossbeam body comprises: a first crossbeam (11) and a second crossbeam (12) having a horizontal portion and two inclined portions, the inclined portions are connected to the rounded corners at both ends of the horizontal portion, and the crossbeam body further comprises: a connecting plate (13) arranged between the first crossbeam (11) and the second crossbeam (12), and a side plate (14) connected to the inclined portions.

2. A gearbox suspension system according to claim 1, characterized in that: The first crossbeam (11) and the second crossbeam (12) are both hollow tubes; the connecting plate (13) is fixedly connected to the inclined portion of the first crossbeam (11) and the inclined portion of the second crossbeam (12).

3. A gearbox suspension system according to claim 1, characterized in that: The side plate (14) comprises a vertical portion and a bent portion which are integrally connected, the bent portion is fixedly connected to the inclined portion, and the vertical portion is provided with a plurality of crossbeam mounting holes (141).

4. A gearbox suspension system according to claim 3, characterized in that: The crossbeam assembly also includes a connecting piece (15) connected to the side plate (14); the connecting piece (15) includes a vertical surface provided with a crossbeam auxiliary mounting hole (151) and a horizontal surface connected to the vertical surface; the crossbeam auxiliary mounting hole (151) corresponds to the crossbeam mounting hole (141).

5. A gearbox suspension system according to claim 2, characterized in that: The crossbeam assembly also includes a supporting portion arranged above the horizontal portion of the first crossbeam (11) and the horizontal portion of the second crossbeam (12); the supporting portion includes a supporting frame (21) fixedly connected to the horizontal portion of the first crossbeam (11) and the horizontal portion of the second crossbeam (12), and a mounting plate (22) arranged above the supporting frame (21).

6. A gearbox suspension system according to claim 5, characterized in that: The support brackets (21) are two hollow tubes, comprising a horizontal portion and two inclined portions connected to the rounded corners at both ends of the horizontal portion; the diameter of the support brackets (21) is not greater than the diameter of the first crossbeam (11) and the second crossbeam (12).

7. A gearbox suspension system according to claim 6, characterized in that: The left and right sides of the mounting plate (22) are both provided with suspension component mounting holes (221); and the middle of the mounting plate (22) is provided with a weight reduction hole (222).

8. The gearbox suspension system according to claim 5, characterized in that: The mounting plate (22) is a bent steel plate.

9. The gearbox suspension system according to claim 5, characterized in that: The gearbox suspension system also includes a suspension component arranged above the mounting plate (22); the suspension component includes a suspension frame (31), a rubber pad (32) integrally connected to the suspension frame (31), and a support frame (33) arranged above the rubber pad (32); the suspension frame (31) is provided with a suspension component auxiliary mounting hole (311) corresponding to the suspension component mounting hole (221).

10. A gearbox suspension system according to claim 9, characterized in that: A plurality of gearbox mounting holes (331) are provided on both left and right sides of the support frame (33); a slot hole (332) is provided in the middle of the support frame (33); and the support frame (33) and the rubber pad (32) are detachably connected via fasteners inserted through the slot hole (332) and the rubber pad (32).

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