Double-runner hydraulic mount

Abstract

The double-flow-channel hydraulic mount comprises a rubber main spring, and an upper liquid chamber arranged in an opening mode is formed in the bottom of the rubber main spring; the base is arranged below the rubber main spring; the double-flow-channel structure is arranged in the base, the double-flow-channel structure comprises an upper flow channel assembly and a lower flow channel assembly, and the double-flow-channel structure has a first state and a second state. Through the arrangement of the double-flow-channel structure, a gap between a decoupling diaphragm and a decoupling diaphragm cavity can be blocked by the decoupling diaphragm under the large amplitude of a vehicle; damping liquid passes through an annular flow channel in the upper metal flow channel piece, so that a large damping angle is obtained, and aftershock generated after an engine passes through a pit and a ridge is relieved; due to the fact that a gap is formed between the decoupling diaphragm and the decoupling diaphragm cavity under the small amplitude, damping liquid can flow into the metal lower flow channel piece from the gap, dynamic stiffness peak valleys are generated at 40 Hz, and therefore the dynamic stiffness of the hydraulic mount is reduced, the vibration isolation rate under the idle speed is increased, and the comfort of the whole vehicle is improved.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic mounts, in particular to a double-channel hydraulic mount. Background Art

[0002] The engine mount is one of the important components of the automobile chassis. Its main function is to connect the engine and the body and isolate the vibration from the road. At present, the hydraulic mount mainly reduces the aftershock attenuation of the engine after passing through pits and bumps. At the same time, it also needs to isolate the vibration caused by starting and idling. Since the damping peak frequency of the current common hydraulic mount under large amplitude is 10-15Hz, the dynamic stiffness at around 40Hz is relatively high, and the high-order vibration isolation rate at idle speed decreases. Therefore, a new hydraulic mount with relatively low dynamic stiffness at 40Hz is needed to increase the vibration isolation rate at idle speed.

[0003] In order to solve the above problems, a dual-channel hydraulic mount is provided. Summary of the invention

[0004] The present invention aims at the deficiencies in the prior art and provides the following technical solutions:

[0005] Dual-channel hydraulic mount, including:

[0006] A rubber main spring, wherein an upper liquid chamber arranged in an open manner is provided at the bottom of the rubber main spring;

[0007] A base, arranged below the rubber main spring;

[0008] A dual-flow channel structure is disposed in the base, the dual-flow channel structure includes an upper flow channel component and a lower flow channel component, the dual-flow channel structure has a first state and a second state, and the dual-flow channel structure can be switched between the first state and the second state;

[0009] An upper flow channel assembly is assembled in the base, and is provided with a decoupling membrane cavity, a decoupling membrane arranged in the decoupling membrane cavity, a plurality of damping holes are respectively arranged on two opposite sides of the decoupling membrane, and an annular flow channel is formed around the decoupling cavity, one end of which is connected to the upper liquid chamber;

[0010] A leather cup is arranged between the upper flow channel assembly and the base, wherein the middle of the leather cup forms an open lower liquid chamber, and the lower liquid chamber is communicated with the annular flow channel;

[0011] A lower flow channel assembly is disposed below the upper flow channel assembly and is in communication with the decoupling cavity and the lower liquid chamber;

[0012] First state: there is a gap between the decoupling diaphragm and the decoupling diaphragm cavity so that it can float, and the damping liquid flows from the upper liquid chamber through the decoupling cavity to the lower flow channel assembly, and then flows from the lower flow channel assembly to the lower liquid chamber to produce a damping effect;

[0013] Second state: the decoupling diaphragm is compressed, resulting in no gap around the decoupling diaphragm cavity, and the damping liquid flows through the annular flow channel to the lower liquid chamber to produce a damping effect.

[0014] The rubber main spring includes an upper frame, a lower frame and a rubber body which are vulcanized into one body. A connecting hole is provided on the rubber body. The upper frame is arranged around the outer periphery of the connecting hole. A bracket is arranged on the outer periphery of the rubber main spring and the base. The lower frame and the base are interference fit in the bracket.

[0015] It also includes a suspension arm assembled in the connecting hole and used for connecting with the engine.

[0016] The upper flow channel assembly also includes a metal upper flow channel component assembled in the base and an upper flow channel plate arranged above the metal upper flow channel component. The upper flow channel plate is engaged between the metal upper flow channel component and the rubber main spring. A flow channel opening is opened on the upper flow channel plate to connect the upper liquid chamber with the annular flow channel.

[0017] The metal upper flow channel component is provided with an upwardly extending annular protrusion, the annular flow channel is formed by the annular protrusion and the inner wall of the metal flow channel component, the annular protrusion forms a accommodating cavity, the accommodating cavity is provided with an integrally formed flow channel lower plate, the flow channel lower plate divides the accommodating cavity from top to bottom into chamber one and chamber two, the decoupling membrane cavity is formed by the chamber one and the flow channel upper plate, the damping holes are respectively formed on the flow channel upper plate and the flow channel lower plate, and the metal upper flow channel component is provided with a connecting port for connecting the annular flow channel with the lower liquid chamber.

[0018] The lower flow channel assembly includes a metal lower flow channel component which is arranged in the second chamber and mounted on the bottom of the flow channel lower plate through rivets, and a through hole which penetrates through the metal lower flow channel component and communicates with the lower liquid chamber.

[0019] A concave surface is formed downward on the metal lower flow channel component and around the through hole.

[0020] Beneficial effects of the present invention:

[0021] By setting up a double-channel structure, the gap between the decoupling diaphragm and the decoupling diaphragm cavity will be blocked by the decoupling diaphragm under large amplitude, and the damping liquid passes through the annular flow channel in the metal upper flow channel part to obtain a relatively large damping angle, thereby alleviating the aftershocks of the engine after passing over pits and bumps; under small amplitude, there is a gap between the decoupling diaphragm and the decoupling diaphragm cavity, and the damping liquid will flow from the gap to the metal lower flow channel part, resulting in dynamic stiffness peaks and valleys at 40Hz, thereby reducing the dynamic stiffness of the hydraulic suspension, increasing the vibration isolation rate at idle speed, and improving the comfort of the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is the front view of the overall structure of the present invention;

[0023] Figure 2 yes Figure 1 Section view along section line AA;

[0024] Figure 3 An exploded view of a local structure of the present invention;

[0025] Figure 4 It is a schematic structural diagram of the metal upper flow channel component of the present invention;

[0026] Figure 5 A bottom view of the metal upper flow channel member of the present invention;

[0027] Figure 6 It is a schematic diagram of the structure of the metal downflow channel member of the present invention;

[0028] Figure 7 This is a dynamic performance test diagram of the present invention.

[0029] Figure numerals: 10, bracket; 20, suspension arm; 30, rubber main spring; 31, upper frame; 32, lower frame; 33, rubber body; 331, connecting hole; 34, upper liquid chamber; 40, base; 50, flow channel upper plate; 501, flow channel outlet; 51, decoupling diaphragm; 52, metal upper flow channel component; 521, annular protrusion; 522, annular flow channel; 523, connecting port; 524, accommodating chamber; 525, flow channel lower plate; 53, leather cup; 54, metal lower flow channel component; 541, through hole; 542, concave surface; 55, lower liquid chamber; 56, damping hole. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] The double-channel hydraulic suspension comprises: a rubber main spring 30 and a base 40 arranged below the rubber main spring 30, wherein an upper liquid chamber 34 arranged in an open manner is arranged at the bottom of the rubber main spring 30, wherein the rubber main spring 30 comprises an upper frame 31, a lower frame 32 and a rubber body 33 vulcanized into one body, wherein a connecting hole 331 is arranged on the rubber body 33, wherein the upper frame 31 is arranged around the outer periphery of the connecting hole 331, wherein a bracket 10 is arranged on the outer periphery of the rubber main spring 30 and the base 40, wherein the lower frame 32 and the base 40 are interference fit in the bracket 10,

[0032] The upper liquid chamber 34 is filled with damping liquid. The rubber main spring 30 supports the engine and isolates the vibration transmitted from the engine to the vehicle body, ensuring that the engine can be stably mounted on the frame during vehicle operation. The upper frame 31 and the lower frame 32 can enhance the overall strength of the rubber main spring 30. The upper frame 31 can provide a stable mounting point for the engine, so that the engine can be firmly connected to the suspension system through the rubber main spring 30 and the upper frame 31. The lower frame 32 facilitates the installation between the rubber main spring 30 and the base 40. The bracket 10 allows the rubber main spring 30 and the base 40 to achieve an interference fit, thereby achieving a seal between the rubber main spring 30 and the base 40.

[0033] In one embodiment, reference Figure 1 , and also includes a suspension arm 20 assembled in the connecting hole 331, which is used to be connected to the engine and installed with the engine through the suspension arm 20.

[0034] In one embodiment, a dual-flow channel structure is disposed in the base 40, the dual-flow channel structure includes an upper flow channel component and a lower flow channel component, the dual-flow channel structure has a first state and a second state, and the dual-flow channel structure can be switched between the first state and the second state;

[0035] An upper flow channel assembly is assembled in the base 40, and is provided with a decoupling membrane cavity, a decoupling membrane 51 arranged in the decoupling membrane cavity, a plurality of damping holes 56 are respectively arranged on two opposite sides of the decoupling membrane, and an annular flow channel 522 is formed around the decoupling cavity and one end of the annular flow channel is connected to the upper liquid chamber;

[0036] A flow channel grid is formed between the multiple groups of damping holes 56, and the shape and size of the flow channel grid are adapted to the decoupling diaphragm, so that the decoupling diaphragm 51 can press the flow channel upper plate 50 or the flow channel lower plate 525, and seal the flow channel grid, so that the damping liquid no longer flows in the decoupling cavity;

[0037] The upper flow channel assembly further includes a metal upper flow channel member 52 assembled in the base 40 and a flow channel upper plate 50 disposed above the metal upper flow channel member 52. The flow channel upper plate 50 is engaged between the metal upper flow channel member 52 and the rubber main spring 30. A flow channel opening 501 is provided on the flow channel upper plate 50 to connect the upper liquid chamber 34 with the annular flow channel 522.

[0038] An upwardly extending annular protrusion 521 is provided in the metal upper flow channel member 52, and the annular flow channel 522 is formed by the annular protrusion 521 and the inner wall of the metal upper flow channel member 52, and the inner wall of the annular protrusion 521 forms a accommodating chamber 524, and a flow channel lower plate 525 is integrally formed in the accommodating chamber 524, and the flow channel lower plate 525 divides the accommodating chamber from top to bottom into chamber one and chamber two, and the decoupling membrane chamber is formed by the chamber one and the flow channel upper plate 50, and the damping holes 56 are respectively formed on the flow channel upper plate 50 and the flow channel lower plate 525, and a connecting port 523 for connecting the annular flow channel 522 with the lower liquid chamber 55 is opened in the metal upper flow channel member 52;

[0039] The annular protrusion 521 forms a sealing surface with the flow channel upper plate 50, so that the damping liquid in the decoupling cavity can only flow and transport through the damping hole 56;

[0040] A leather cup 53 is disposed between the upper flow channel assembly and the base 40 , and an open lower liquid chamber 55 is formed in the middle of the leather cup 53 , and the lower liquid chamber 55 is communicated with the annular flow channel 522 ;

[0041] The leather cup 53 is press-fitted between the base 40 and the metal upper flow channel component 52 , so that the leather cup 53 and the metal upper flow channel component 52 form a seal to prevent leakage of the lower liquid chamber 55 .

[0042] A lower flow channel assembly is disposed below the upper flow channel assembly and is in communication with the decoupling cavity and the lower liquid chamber 55;

[0043] The lower flow channel assembly includes a metal lower flow channel member 54 disposed in the second chamber and mounted on the bottom of the flow channel lower plate 525 by rivets, and a through hole 541 penetrating through the metal lower flow channel member 54 and communicating with the lower liquid chamber 55;

[0044] The edge of the flow channel lower plate 525 forms a sealing surface with the edge of the metal lower flow channel member 54 through rivets;

[0045] The damping liquid is uniformly distributed in the upper liquid chamber 34 and the lower liquid chamber 55. The decoupling diaphragm 51 is made of rubber and is used to buffer the flow of the damping liquid on both sides. The upper and lower surfaces of the decoupling diaphragm 51 have multiple groups of protrusions. Under the condition of large amplitude (i.e., the second state), the decoupling diaphragm can be tightly fitted with the flow channel upper plate 50 or the flow channel lower plate 525 by the impact of the damping liquid, so that the chamber 1 and the flow channel upper plate 50 enclose the decoupling diaphragm cavity and the decoupling diaphragm 51 without a gap so that the damping liquid passes through The metal lower flow channel member 54, so the damping liquid in the upper liquid chamber 34 enters the annular flow channel 522 on the metal upper flow channel member 52 through the flow channel opening 501 on the flow channel upper plate 50. Since the annular flow channel 522 is relatively long and has a small flow channel cross-sectional area, a relatively low damping peak frequency is obtained, which satisfies the rapid aftershock attenuation of the engine under the large amplitude of the whole vehicle, and obtains better comfort. The damping liquid entering the annular flow channel 522 enters the lower liquid chamber 55 through the connecting port 523;

[0046] Under the small amplitude working condition (i.e. the first state), the movement amplitude of the decoupling diaphragm 51 is very small, and there is a gap between the decoupling diaphragm 51 and the decoupling diaphragm cavity. Under the action of the damping liquid, the decoupling diaphragm 51 can float in the decoupling diaphragm cavity. Due to the small amplitude, the damping liquid cannot flow in the annular flow channel 522. Therefore, the damping liquid in the upper liquid chamber 34 can easily enter the metal lower flow channel part 54 through the damping hole 56, and is transported to the lower liquid chamber 55 through the through hole 541. Since the diameter of the through hole is relatively large and the length of the damping hydraulic flow channel is relatively short, the damping peak frequency is increased, so that the dynamic stiffness curve has peaks and valleys at around 40Hz, thereby reducing the dynamic stiffness of the device, obtaining a better idle vibration isolation rate, and improving NVH comfort.

[0047] In one embodiment, a concave surface 542 is formed downwardly on the metal lower runner member 54 and around the through hole 541, and a gap is formed between the metal lower runner member and the runner lower plate 525 through the concave surface, so as to facilitate the damping liquid in the decoupling cavity to enter the through hole 541.

[0048] Figure 7 It includes the dynamic stiffness curve at an amplitude of ±0.05mm from 0 to 100Hz and the damping curve at an amplitude of ±0.5mm.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. Double-channel hydraulic mount, characterized in that: include: A rubber main spring (30), wherein an upper liquid chamber (34) arranged in an open manner is provided at the bottom of the rubber main spring (30); A base (40) is arranged below the rubber main spring (30); A dual-flow channel structure is arranged in the base (40), the dual-flow channel structure comprises an upper flow channel component and a lower flow channel component, the dual-flow channel structure has a first state and a second state, and the dual-flow channel structure can be switched between the first state and the second state; An upper flow channel assembly is assembled in the base (40), the upper flow channel assembly is provided with a decoupling membrane cavity, a decoupling membrane (51) arranged in the decoupling membrane cavity, a plurality of damping holes (56) are respectively provided on two opposite sides of the decoupling membrane, and an annular flow channel (522) is formed around the decoupling cavity and one end of the annular flow channel is connected to the upper liquid chamber; A leather cup (53) is arranged between the upper flow channel assembly and the base (40), and an open lower liquid chamber (55) is formed in the middle of the leather cup (53), and the lower liquid chamber (55) is communicated with the annular flow channel (522); A lower flow channel assembly is disposed below the upper flow channel assembly and is in communication with the decoupling cavity and the lower liquid chamber (55); In the first state, there is a gap between the decoupling diaphragm (51) and the decoupling diaphragm cavity so that the decoupling diaphragm (51) can float, and the damping liquid flows from the upper liquid chamber (34) through the decoupling cavity to the lower flow channel component, and then flows from the lower flow channel component to the lower liquid chamber (55) to produce a damping effect; Second state: the decoupling diaphragm is compressed, resulting in no gap around the decoupling diaphragm cavity, and the damping liquid flows through the annular flow channel (522) to the lower liquid chamber (55) to produce a damping effect.

2. The dual-channel hydraulic mount according to claim 1, characterized in that: The rubber main spring (30) comprises an upper frame (31), a lower frame (32) and a rubber body (33) which are vulcanized into one piece, a connecting hole (331) is provided on the rubber body (33), the upper frame (31) is arranged around the outer periphery of the connecting hole (331), a bracket (10) is arranged on the outer periphery of the rubber main spring (30) and the base (40), and the lower frame (32) and the base (40) are interference fit in the bracket (10).

3. The dual-channel hydraulic mount according to claim 2, characterized in that: It also includes a suspension arm (20) assembled in the connection hole (331) and used for connecting with the engine.

4. The dual-channel hydraulic mount according to claim 1, characterized in that: The upper flow channel assembly also includes a metal upper flow channel component (52) assembled in the base (40) and a flow channel upper plate (50) arranged above the metal upper flow channel component (52), the flow channel upper plate is engaged between the metal upper flow channel component (52) and the rubber main spring (30), and a flow channel opening (501) is opened on the flow channel upper plate (50) to enable the upper liquid chamber (34) to communicate with the annular flow channel (522).

5. The dual-channel hydraulic mount according to claim 4, characterized in that: The metal upper flow channel component (52) is provided with an upwardly extending annular protrusion (521), and the annular flow channel (522) is formed by the annular protrusion (521) and the inner wall of the metal flow channel component (52), and the annular protrusion (521) forms a accommodating chamber (524), and a flow channel lower plate (525) is integrally formed in the accommodating chamber (524), and the flow channel lower plate (525) divides the accommodating chamber from top to bottom into chamber one and chamber two, and the decoupling membrane chamber is formed by the chamber one and the flow channel upper plate (50), and the damping hole (56) is respectively formed on the flow channel upper plate (50) and the flow channel lower plate (525), and a connecting port (523) for connecting the annular flow channel (522) with the lower liquid chamber (55) is opened in the metal upper flow channel component (52).

6. The dual-channel hydraulic mount according to claim 5, characterized in that: The lower flow channel assembly comprises a metal lower flow channel component (54) disposed in the second chamber and mounted on the bottom of the flow channel lower plate (525) by rivets, and a through hole (541) penetrating the metal lower flow channel component (54) and communicating with the lower liquid chamber (55).

7. The dual-channel hydraulic mount according to claim 6, characterized in that: A concave surface (542) is formed downwardly on the metal lower flow channel member (54) and around the through hole (541).

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