Vehicle, hydraulic mount and runner assembly of hydraulic mount

Abstract

The invention discloses a vehicle, a hydraulic mount and a flow channel assembly thereof, the flow channel assembly is provided with a first flow channel and a second flow channel which are not communicated with each other, and the flow channel assembly comprises a decoupling film; the first runner is used for communicating an upper cavity and a lower cavity of the hydraulic mount; the second flow channel can be communicated with the upper chamber and the lower chamber; the decoupling film has a free movement amount, can conduct or cut off a communication passage between the second flow channel and the upper chamber and between the second flow channel and the lower chamber when moving in a movement range of the decoupling film, and is configured to cut off the communication passage when being excited by a first amplitude and cut off the communication passage when being excited by a second amplitude. The decoupling film conducts the communication path, and the first amplitude is larger than the second amplitude. According to the flow channel assembly, the flow channel structure capable of being automatically opened and closed is additionally arranged, so that the hydraulic mount can have the performance of large amplitude, high damping, small amplitude and low rigidity.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a vehicle, a hydraulic suspension and a flow channel component thereof. Background Art

[0002] Generally, a hydraulic mount is provided between the powertrain (such as the engine) and the vehicle frame to reduce the bidirectional vibration transmission between the powertrain and the vehicle body and meet the overall smoothness and comfort requirements.

[0003] The working principle of hydraulic mount is to use the flow of liquid between the upper and lower chambers to dissipate vibration energy to achieve the purpose of vibration attenuation. In the related art, the hydraulic mount has a flow channel, which cannot take into account the ultra-low dynamic stiffness vibration isolation requirements of small amplitude at a specific frequency while obtaining large amplitude hydraulic damping vibration attenuation. Summary of the invention

[0004] The purpose of the present application is to provide a vehicle, a hydraulic suspension and a flow channel assembly thereof, wherein the flow channel assembly enables the hydraulic suspension to have the performance of large amplitude and high damping, and small amplitude and low stiffness by adding a flow channel structure that can be opened and closed autonomously.

[0005] In order to solve the above technical problems, the present application provides a flow channel assembly of a hydraulic mount, wherein the flow channel assembly has a first flow channel and a second flow channel which are not connected to each other, and the flow channel assembly includes a decoupling membrane;

[0006] The first flow channel is used to connect the upper chamber and the lower chamber of the hydraulic mount;

[0007] The second flow channel can communicate the upper chamber and the lower chamber;

[0008] The decoupling membrane has a free movement amount. When the decoupling membrane moves within its movement range, it can open or cut off the connecting path between the second flow channel and the upper chamber and the lower chamber. The decoupling membrane is configured to cut off the connecting path when excited by a first amplitude, and open the connecting path when excited by a second amplitude, and the first amplitude is greater than the second amplitude.

[0009] By adopting the above scheme, the flow channel assembly is provided with two flow channels, wherein the first flow channel can always connect the upper chamber and the lower chamber of the hydraulic suspension, and the second flow channel can be opened or closed autonomously according to the amplitude, so that the upper chamber can be connected with the lower chamber through the second flow channel according to the vibration conditions. In this way, the first flow channel can be used to achieve vibration attenuation under large amplitude conditions, and the second flow channel can be used to achieve vibration isolation under small amplitude conditions. The structural setting of the flow channel assembly enables the hydraulic suspension to have the performance of high damping for large amplitude and low stiffness for small amplitude.

[0010] The hydraulically suspended flow channel assembly as described above, the flow channel assembly includes an installation chamber, the installation chamber and the second flow channel are connected in series between the upper chamber and the lower chamber, and the installation chamber is communicated with the second flow channel; the decoupling membrane is located in the installation chamber, and the decoupling membrane can move up and down between the top wall and the bottom wall of the installation chamber.

[0011] The flow channel assembly of the hydraulic mount as described above, wherein the installation chamber is arranged close to the upper chamber relative to the second flow channel;

[0012] The cavity top wall has a through hole, and the through hole communicates with the installation cavity and the upper cavity;

[0013] The second flow channel has a first communication port and a second communication port, the second flow channel is communicated with the installation chamber through the first communication port, and the second flow channel is communicated with the lower chamber through the second communication port;

[0014] The decoupling film can open or close the first communication port when moving.

[0015] The flow channel assembly of the hydraulic mount as described above, the flow channel assembly comprises a flow channel body and a cover plate; at least a portion of the second flow channel is formed in the flow channel body;

[0016] The flow channel body has a mounting groove with a notch facing upward, the cover plate blocks the notch, the mounting chamber is formed between the cover plate and the mounting groove, the through hole is provided on the cover plate, the first connecting port is provided on the bottom wall of the mounting groove, a flow space is formed between the decoupling membrane and the cavity wall of the mounting chamber, and the flow space can connect the through hole and the first connecting port.

[0017] As described above, in the hydraulically suspended flow channel assembly, the second flow channel includes a second flow channel cavity provided on the flow channel body, the flow channel body has a second flow channel groove with a second opening facing downward, the flow channel assembly also includes a flow channel plate, the flow channel plate is fixedly connected to the flow channel body, the flow channel plate blocks the second opening, the second flow channel cavity is formed between the flow channel plate and the second flow channel groove, and the second connecting port is provided on the flow channel plate.

[0018] In the hydraulically mounted flow channel assembly as described above, the flow channel plate and the flow channel body are fixedly connected by interference fitting, riveting, welding or screwing.

[0019] As described above, in the hydraulically suspended flow channel assembly, the flow channel body has a first flow channel groove with a first opening facing upward, the cover plate also blocks the first opening, a first flow channel cavity is formed between the cover plate and the first flow channel groove, the cover plate has a first flow port, the first flow port connects the first flow channel cavity and the upper chamber, the flow channel body also has a second flow port, the second flow port connects the first flow channel cavity and the lower chamber; the first flow channel includes the first flow channel cavity, the first flow port and the second flow port.

[0020] In the flow channel assembly of the hydraulic mount as described above, the first flow channel cavity is an annular cavity, and the first flow channel cavity is arranged around the mounting groove.

[0021] In the hydraulically mounted flow channel assembly as described above, the cover plate has more than two through holes.

[0022] In the flow channel assembly of the hydraulic mount as described above, the number of the first communication ports is more than two, and / or the number of the second communication ports is more than two.

[0023] In the hydraulically suspended flow channel assembly as described above, the length parameter of the second flow channel is greater than the length parameter of the first flow channel; the length parameter of the second flow channel is the sum of the distances between each inlet end and each outlet end of the second flow channel; the length parameter of the first flow channel is the distance between the inlet end and the outlet end of the first flow channel in the arrangement direction of the upper chamber and the lower chamber.

[0024] The present invention also provides a hydraulic suspension, including a suspension body, the suspension body including a rubber main spring, a flow channel assembly and a flow channel base, the flow channel assembly is the flow channel assembly described in any one of the above items; the flow channel assembly is arranged between the rubber main spring and the flow channel base, an upper chamber is formed between the rubber main spring and the flow channel assembly, and a lower chamber is formed between the flow channel assembly and the flow channel base.

[0025] Since the above-mentioned flow channel assembly has the above-mentioned technical effects, the hydraulic mount including the flow channel assembly also has the same technical effects, which will not be discussed again here.

[0026] The hydraulic suspension as described above further includes a suspension shell and a suspension support arm, wherein the suspension shell is externally mounted on the suspension body, the suspension support arm is fixedly inserted into the suspension body, the suspension shell is used to connect to the vehicle body, and the suspension support arm is used to connect to the powertrain.

[0027] The present invention further provides a vehicle, comprising a vehicle body, a powertrain and a hydraulic suspension, wherein the hydraulic suspension is the hydraulic suspension described above, and the hydraulic suspension is connected between the vehicle body and the powertrain.

[0028] Since the hydraulic mount has the above-mentioned technical effects, the vehicle including the hydraulic mount also has the same technical effects, which will not be discussed again here. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A three-dimensional diagram of a hydraulic mount in an embodiment provided in the present application;

[0030] Figure 2 for Figure 1 A perspective view of the hydraulic mount from another perspective;

[0031] Figure 3 for Figure 1 The assembly diagram of the hydraulic mount shown;

[0032] Figure 4 for Figure 1 Schematic diagram of the assembly of the middle suspension body;

[0033] Figure 5 for Figure 4 A schematic cross-sectional view of an angle of the middle suspension body;

[0034] Figure 6 for Figure 4 A cross-sectional schematic diagram of the middle suspension body at another angle;

[0035] Figure 7 for Figure 4 A three-dimensional cross-sectional view of the mid-flow channel assembly;

[0036] Figure 8 for Figure 4 A schematic cross-sectional view of the mid-flow channel assembly;

[0037] Fig. 9 for Figure 4 Schematic diagram of the local structure of the mid-flow channel component;

[0038] Fig.10 The schematic diagram of the hydraulic mount provided for this application;

[0039] Fig.11 A damping curve diagram of a hydraulic mount in a specific embodiment when subjected to a large amplitude excitation is shown;

[0040] Fig.12 A dynamic stiffness curve diagram of a hydraulic mount in a specific embodiment when subjected to a small amplitude excitation is shown;

[0041] Fig.13 A three-dimensional diagram of a flow channel assembly in another embodiment provided by the present application;

[0042] Fig.14 for Fig.13 A schematic cross-sectional view of the flow channel assembly shown.

[0043] Description of reference numerals:

[0044] Hydraulic mount 1, a mount body 1-1, a mount housing 1-2, and a mount bracket 1-3;

[0045] Rubber main spring 11, upper insert 111, rubber body 112, lower insert 113;

[0046] The flow channel assembly 12, the cover plate 121, the through hole 121a, the decoupling membrane 122, the flow channel body 123, the installation chamber 123a, the cavity bottom wall 1231a, the flow channel plate 124, and the sealing member 125;

[0047] Flow channel base 13, rubber cup 131, base body 132;

[0048] Upper chamber 14a, lower chamber 14b;

[0049] First flow channel 15a, first flow opening 151a, second flow opening 152a, first flow channel cavity 153a;

[0050] The second flow channel 15b, the first communication port 151b, the second communication port 152b, the second flow channel cavity 153b,

[0051] Flow space 16a. DETAILED DESCRIPTION

[0052] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0053] For ease of understanding and concise description, the following text will describe the vehicle, hydraulic mount and its flow channel assembly together, and the beneficial effects will not be repeated.

[0054] The directional words such as upper and lower involved in this article are Figures 5 to 9 The locations of the components in the figure and the relative positional relationships between the components are defined as references only for the convenience of describing and understanding the technical solution. It should be understood that the use of the directional words does not constitute a limitation on the scope of protection.

[0055] Please refer to Figures 1 to 3 , Figure 1 A three-dimensional diagram of a hydraulic mount in an embodiment provided in the present application; Figure 2 for Figure 1 A perspective view of the hydraulic mount from another perspective; Figure 3 for Figure 1 Schematic diagram of the assembly of the hydraulic mount shown.

[0056] In this embodiment, the vehicle includes a vehicle body, a powertrain and a hydraulic mount 1, wherein the powertrain generally includes an engine, etc. The hydraulic mount 1 is connected between the vehicle body and the powertrain to reduce bidirectional vibration transmission between the powertrain and the vehicle body.

[0057] In this embodiment, the hydraulic suspension 1 includes a suspension body 1-1, a suspension shell 1-2 and a suspension support arm 1-3; the suspension body 1-1 is mainly used to provide the stiffness and damping angle characteristics of the hydraulic suspension 1, so as to realize the function of attenuating large-amplitude shaking of the powertrain and isolating small-amplitude shaking; the suspension shell 1-2 is externally mounted on the suspension body 1-1, relatively fixed to the suspension body 1-1, and used to be connected to the vehicle body. Generally, a mounting hole can be set on the suspension shell 1-2, and the suspension shell 1-2 is fixed to the vehicle body by fasteners such as bolts, so as to realize the connection between the suspension body 1-1 and the vehicle body. The suspension shell 1-2 and the suspension body 1-1 can be relatively fixed by interference fitting; one end of the suspension support arm 1-3 is fixedly inserted in the suspension body 1-1, and the other end is connected to the powertrain. The suspension support arm 1-3 and the suspension body 1-1 can also be relatively fixed by interference fitting.

[0058] In addition to the interference fit method mentioned above, the relative fixation between the suspension housing 1-2, the suspension bracket 1-3 and the suspension body 1-1 may also be in other forms.

[0059] Please refer to Figures 4 to 6 , Figure 4 for Figure 1 Schematic diagram of the assembly of the middle suspension body; Figure 5 for Figure 4 A schematic cross-sectional view of an angle of the middle suspension body; Figure 6 for Figure 4 A schematic cross-sectional view of the middle suspension body from another angle.

[0060] In this embodiment, the suspension body 1 - 1 includes a rubber main spring 11 , a flow channel assembly 12 and a flow channel base 13 .

[0061] The rubber main spring 11 includes an upper insert 111, a rubber body 112 and a lower insert 113. The upper end of the rubber body 112 has a through-hole structure for inserting the suspension bracket 1-3. The upper insert 111 is embedded in the area where the through-hole structure is located. The lower insert 113 is embedded in the rubber body 112 from the bottom of the rubber body 112. The upper insert 111 and the lower insert 113 play a supporting role for the rubber body 112. During processing, the upper insert 111, the lower insert 113 and the rubber body 112 can be integrally formed through a vulcanization process. The rubber main spring 11 has the stretchability and compressibility of rubber, and can provide the rigidity and damping performance of the hydraulic suspension 1.

[0062] The rubber body 112 also has an upwardly recessed portion below, which is used to cooperate with the flow channel assembly 12 to form an upper chamber 14 a of the hydraulic mount 1 .

[0063] The flow channel assembly 12 is located below the rubber main spring 11 and has a flow channel that can connect the upper and lower parts thereof.

[0064] The flow channel base 13 is located below the flow channel assembly 12. The flow channel base 13 includes a rubber leather cup 131 and a base body 132. The rubber leather cup 131 is elastic and is embedded between the base body 132. The inner cavity of the base body 132 has an upward annular step surface. The upper end opening of the rubber leather cup 131 has an outwardly bent flange, and the rubber leather cup 131 can be overlapped on the annular step surface of the base body 132 through its flange.

[0065] During assembly, the flow channel assembly 12 is supported by the annular step surface of the base body 132, and the flow channel assembly 12 can press the rubber cup 131 downward to position the rubber cup 131. Specifically, a groove can be provided at the bottom of the flow channel assembly 12, and the top of the rubber cup 131 can be embedded in the bottom groove of the flow channel assembly 12 to ensure positioning reliability.

[0066] The upper end of the base body 132 of the flow channel base 13 is assembled with the lower end of the rubber main spring 11 , and the flow channel assembly 12 is arranged between the rubber main spring 11 and the flow channel base 13 . The lower end of the rubber main spring 11 can extend into the base body 132 , pressing the flow channel assembly 12 against the annular step surface of the base body 132 .

[0067] After assembly, an upper chamber 14a is formed between the flow channel assembly 12 and the rubber main spring 11, and a lower chamber 14b is formed between the flow channel assembly 12 and the flow channel base 13. Figure 5 and Figure 6 Most of the cavity wall of the upper chamber 14a is formed by the rubber body 112 of the rubber main spring 11, and most of the cavity wall of the lower chamber 14b is formed by the rubber leather cup 131. In this way, the upper chamber 14a and the lower chamber 14b can be deformed. When subjected to vibration, the pressure in the cavity can be changed by deformation, so that the liquid filled in the cavity can flow to change the damping and stiffness of the hydraulic suspension 1.

[0068] Generally, a through hole connected to the flow channel of the flow channel assembly 12 is provided on the base body 132 of the flow channel base 13, and the through hole can connect the flow channel of the flow channel assembly 12 with the outside. The rubber main spring 11, the flow channel assembly 12 and the flow channel base 13 are assembled in liquid so that the internal chamber of the hydraulic mount 1 is filled with liquid, and then the through hole is sealed with a seal 125. In the illustrated example, the seal 125 is a sealing steel ball.

[0069] In actual applications, the shape and size of the upper chamber 14a and the lower chamber 14b can be set according to specific needs, and the shape and specific structure of the rubber main spring 11, the shape and specific structure of the flow channel base 13 can be set according to application needs.

[0070] The present application focuses on improving the structure of the flow channel assembly 12 , and by optimizing the flow channel structure, the hydraulic mount 1 can have the performance of large amplitude and high damping and small amplitude and low stiffness.

[0071] The structure of the flow channel assembly 12 is described in detail below.

[0072] Please refer to Figures 7 to 9 , Figure 7 for Figure 4 A three-dimensional cross-sectional view of the mid-flow channel assembly; Figure 8 for Figure 4 A schematic cross-sectional view of the mid-flow channel assembly; Fig. 9 for Figure 4 Schematic diagram of the partial structure of the mid-flow channel component.

[0073] In this embodiment, the flow channel assembly 12 has a first flow channel 15a and a second flow channel 15b that are not connected to each other; wherein the first flow channel 15a is used to connect the upper chamber 14a and the lower chamber 14b of the hydraulic mount 1, and the first flow channel 15a is in a normally open state, that is, the upper chamber 14a of the hydraulic mount 1 is always connected to the lower chamber 14b through the first flow channel 15a.

[0074] The flow channel assembly 12 includes a decoupling membrane 122, and the second flow channel 15b can connect the upper chamber 14a and the lower chamber 14b. The decoupling membrane 122 has a free movement amount. When the decoupling membrane 122 moves within its moving range, it can open or cut off the connecting path between the second flow channel 15b and the upper chamber 14a and the lower chamber 14b. That is to say, when the decoupling membrane 122 is in a position to connect the second flow channel 15b, the upper chamber 14a can be connected with the lower chamber 14b through the second flow channel 15b. When the decoupling membrane 122 is in a position to cut off the second flow channel 15b, the upper chamber 14a cannot be connected with the lower chamber 14b through the second flow channel 15b due to the restriction of the decoupling membrane 122. Specifically, when excited by a relatively large first amplitude, the decoupling membrane 122 cuts off the communication path between the second flow channel 15b and the upper chamber 14a or the lower chamber 14b. When excited by a relatively small second amplitude, the decoupling membrane 122 opens the communication path between the second flow channel 15b and the upper chamber 14a or the lower chamber 14b.

[0075] In application, when the hydraulic suspension 1 is subjected to a large amplitude excitation (generally above 0.3 mm), the liquid flows between the upper chamber 14a and the lower chamber 14b through the first flow channel 15a, which can provide a larger damping angle to attenuate the vibration; at this time, the decoupling membrane 122 will cut off the communication path between the second flow channel 15b and the upper chamber 14a and the lower chamber 14b, and the second flow channel 15b basically does not provide damping and vibration attenuation.

[0076] When the hydraulic mount 1 is subjected to a small amplitude excitation (generally less than 0.3 mm), generally the vibration excitation of the powertrain, the decoupling membrane 122 will move with a small amplitude, thereby opening the communication path between the second flow channel 15b and the upper chamber 14a and the lower chamber 14b, and the liquid can flow between the upper chamber 14a and the lower chamber 14b through the second flow channel 15b. At this time, the liquid can still flow between the upper chamber 14a and the lower chamber 14b through the first flow channel 15a. In this state, it is mainly affected by the second flow channel 15b, and a low dynamic stiffness with a small amplitude at a medium and high frequency can be obtained to achieve the effect of isolating vibration. In actual implementation, the vibration frequency and dynamic stiffness value corresponding to the lowest point dynamic stiffness can be adjusted by designing the structure size of the second flow channel 15b.

[0077] It should be pointed out that the aforementioned larger amplitude excitation and smaller amplitude excitation are relative concepts. During specific implementation, the hydraulic mount 1 can be set according to the amplitude of the specific application object.

[0078] Please refer to Figures 10 to 12 , Fig.10 The schematic diagram of the hydraulic mount provided for this application; Fig.11 A damping curve diagram of a hydraulic mount in a specific embodiment when subjected to a large amplitude excitation is shown; Fig.12 A dynamic stiffness curve diagram of a hydraulic mount in a specific embodiment when subjected to a small amplitude excitation is shown.

[0079] After the flow channel assembly 12 provided in the embodiment of the present application is applied to the hydraulic mount 1, its working principle is as follows: Fig.10 As shown, Fig.10 S represents a vibration displacement applied to the hydraulic mount 1, Ks represents the stiffness of the hydraulic mount 1, 15a represents the first flow channel, 15b represents the second flow channel, the first flow channel 15a is in a normally open state, and the second flow channel 15b can be opened or closed autonomously according to the amplitude excitation.

[0080] When the hydraulic mount 1 is subjected to low-frequency and large-amplitude excitation, the first flow channel 15a, which is normally open, works, and the second flow channel 15b is disconnected and does not work. Under the same conditions, the damping curves of the hydraulic mount 1 using the present solution and the existing hydraulic mount under low-frequency and large-amplitude excitation are compared, as shown in FIG. Fig.11As shown, the damping angle variation curve q1 of the hydraulic mount 1 of the present solution is compared with the damping angle variation curve q2 of the existing hydraulic mount, and the peak values ​​and corresponding peak frequencies of the two are basically the same. The existing hydraulic mount has only one flow channel connecting the upper and lower chambers. It can be seen that after the hydraulic mount 1 of the present solution adopts the flow channel assembly 12 with dual flow channels, it will not affect the performance of the hydraulic mount 1 at low frequency and large amplitude, and can still achieve vibration attenuation under large amplitude conditions.

[0081] When the hydraulic mount 1 is excited by medium-high frequency and small amplitude, the first flow channel 15a that is normally open works, and the second flow channel 15b that is connected also works. Under the influence of the second flow channel 15b, the hydraulic mount 1 can obtain a lower dynamic stiffness to achieve the function of isolating vibration. Under the same conditions, the dynamic stiffness curves of the hydraulic mount 1 using the present solution and the existing hydraulic mount under medium-high frequency and small amplitude excitation are compared, as shown in FIG. Fig.12 As shown, q3 represents the dynamic stiffness curve of the hydraulic mount 1 of the present solution under medium-high frequency and small amplitude excitation, and q4 represents the dynamic stiffness curve of the existing hydraulic mount under medium-high frequency and small amplitude excitation. The hydraulic mount 1 of the present solution can provide relatively small dynamic stiffness at a specific frequency. Fig.12 As shown, the specific frequency is 40 Hz, which is significantly lower than the dynamic stiffness that can be provided by the existing hydraulic mount.

[0082] From the above comparison, it can be seen that the flow channel component 12 of the hydraulic suspension 1 of the present solution, after adopting the second flow channel 15b which can be opened and closed autonomously according to the amplitude, can not only provide hydraulic damping under large amplitude conditions to achieve vibration attenuation, but also provide low stiffness under small amplitude adjustment to isolate vibration, and can take into account the performance required in both states, and achieve the NVH (Noise, Vibration, Harshness) comfort requirements of the whole vehicle under different working conditions.

[0083] In actual implementation, the vibration frequency and dynamic stiffness value corresponding to the lowest point dynamic stiffness can be adjusted by designing the structure and size of the second flow channel 15b, so that the hydraulic mount 1 can be set according to the actual working condition requirements of the vehicle.

[0084] In this embodiment, the flow channel assembly 12 includes an installation chamber 123a, the installation chamber 123a and the second flow channel 15b are connected in series between the upper chamber 14a and the lower chamber 14b, the installation chamber 123a is connected to the second flow channel 15b, and the decoupling membrane 122 is located in the installation chamber 123a. The decoupling membrane 122 can move up and down between the top wall and the bottom wall 1231a of the installation chamber 123a.

[0085] In this way, the area where the second flow channel 15b and the decoupling membrane 122 are located are connected in series between the upper chamber 14a and the lower chamber 14b. The decoupling membrane 122 will move slightly under small-amplitude vibration excitation, thereby achieving the conduction or cutoff of the connecting path between the second flow channel 15b and the upper chamber 14a and the lower chamber 14b. This structural setting is more convenient.

[0086] In actual implementation, the installation chamber 123a can be close to the upper chamber 14a relative to the second flow channel 15b, that is, the installation chamber 123a connects the upper chamber 14a and the second flow channel 15b, and the second flow channel 15b connects the lower chamber 14b; the installation chamber 123a can also be close to the lower chamber 14b relative to the second flow channel 15b, that is, the upper chamber 14a connects the second flow channel 15b, and the second flow channel 15b connects the lower chamber 14b through the installation chamber 123a.

[0087] The specific structural form of the flow channel assembly 12 is explained below by taking the installation chamber 123a being close to the upper chamber 14a relative to the second flow channel 15b as an example. When the installation chamber 123a is far away from the upper chamber 14a relative to the second flow channel 15b, the structure of the flow channel assembly 12 can be adaptively adjusted and will not be explained again.

[0088] Refer to Figures 7 to 9 In this embodiment, the installation chamber 123a is located above the second flow channel 15b, and between the second flow channel 15b and the upper chamber 14a; the top wall of the installation chamber 123a has a through hole 121a, which connects the installation chamber 123a and the upper chamber 14a; the second flow channel 15b has a first connecting port 151b and a second connecting port 152b, the second flow channel 15b is connected to the installation chamber 123a through the first connecting port 151b, and the second flow channel 15b is connected to the lower chamber 14b through the second connecting port 152b; the decoupling membrane 122 placed in the installation chamber 123a can open or close the first connecting port 151b of the second flow channel 15b when moving.

[0089] In specific applications, when the decoupling membrane 122 opens the first connecting port 151b during the up and down small amplitude movement, the flow path of the liquid in the flow component 12 is indicated by the dotted arrow in 7, and the specific flow path of the liquid between the upper chamber 14a and the lower chamber 14b through the second flow channel 15b is as follows: upper chamber 14a→through hole 121a→installation chamber 123a→first connecting port 151b→second flow channel 15b→second connecting port 152b→lower chamber 14b.

[0090] In actual implementation, the flow channel assembly 12 includes a flow channel body 123 and a cover plate 121, wherein at least a portion of the second flow channel 15b is formed on the flow channel body 123, the flow channel body 123 has a mounting groove with a notch facing upward, the cover plate 121 blocks the notch of the mounting groove, and the aforementioned mounting chamber 123a is formed between the cover plate 121 and the mounting groove. It can be understood that the cover plate 121 forms the top wall of the mounting chamber 123a, the aforementioned through hole 121a is provided on the cover plate 121, and the first connecting port 151b is provided on the bottom wall of the mounting groove, that is, the first connecting port 151b is formed on the bottom wall 1231a of the mounting chamber 123a. The decoupling membrane 122 is placed in the installation chamber 123a, and has free movement between the cover plate 121 and the cavity bottom wall 1231a. At the same time, in order to facilitate the flow of liquid between the installation chamber 123a and the second flow channel 15b, a flow space 16a is formed between the decoupling membrane 122 and the cavity wall of the installation chamber 123a. The flow space 16a can connect the through hole 121a and the first connecting port 151b. It can be understood that after the liquid flows into the installation chamber 123a from the through hole 121a, it actually flows in the flow space 16a formed between the cavity wall of the installation chamber 123a and the decoupling membrane 122.

[0091] Specifically, the second flow channel 15b includes a second flow channel cavity 153b provided on the flow channel body 123, the flow channel body 123 has a second flow channel groove with a second opening facing downward, the flow channel assembly 12 also includes a flow channel plate 124, the flow channel plate 124 blocks the second opening, and a second flow channel cavity 153b is formed between the flow channel plate 124 and the second flow channel groove, and the aforementioned second connecting port 152b is provided on the flow channel plate 124.

[0092] In actual implementation, the flow channel plate 124 and the flow channel body 123 can be fixedly connected by interference fitting, riveting, welding, screwing, etc.

[0093] At least part of the first flow channel 15a is also formed in the flow channel body 123. Specifically, the flow channel body 123 has a first flow channel groove with a first opening facing upward. The aforementioned cover plate 121 also blocks the first opening, and a first flow channel cavity 153a is formed between the cover plate 121 and the first flow channel groove. The cover plate 121 also has a first flow port 151a, and the first flow port 151a communicates with the first flow channel cavity 153a and the upper chamber 14a. The flow channel body 123 also has a second flow port 152a, the second flow port 152a connects the first flow channel cavity 153a and the lower chamber 14b. For the convenience of processing, the second flow port 152a is arranged on the bottom wall of the second flow channel groove; the first flow channel 15a includes the aforementioned first flow port 151a, the second flow port 152a and the first flow channel cavity 153a. The first flow port 151a and the second flow port 152a are in a normally open state, that is, the first flow channel 15a always connects the upper chamber 14a and the lower chamber 14b.

[0094] The structure of the flow channel assembly 12 integrates the first flow channel 15 a , the second flow channel 15 b , and the installation chamber 123 a for accommodating the decoupling membrane 122 , and the structure is relatively compact.

[0095] Furthermore, the first flow channel cavity 153a is an annular cavity, which is arranged around the installation groove, that is, around the installation chamber 123a. Of course, in actual arrangement, the first flow channel cavity 153a and the installation chamber 123a can also be arranged side by side or in other forms.

[0096] In the illustrated example, the flow channel assembly 12 is generally in the form of a rectangular parallelepiped. In actual applications, its specific shape may also be set to other forms.

[0097] In a specific implementation, since the cover plate 121 is located above the flow channel body 123, during assembly, the relative position between the cover plate 121 and the flow channel body 123 can be limited by the cooperation between the rubber main spring 11 and the flow channel base 13, such as Figure 5 and Figure 6 As shown in the figure, the annular step surface of the base body 132 of the flow channel base 13 supports the flow channel body 123, and the rubber main spring 11 presses the cover plate 121 downward on the flow channel body 123. After the rubber main spring 11 and the flow channel support 13 are relatively fixed, the cover plate 121 and the flow channel body 123 can be relatively fixed. Of course, in other embodiments, the cover plate 121 and the flow channel body 123 can also be fixedly connected by interference fitting, riveting, welding, screwing, etc.

[0098] In the illustrated example, the cover plate 121 is provided with a plurality of through holes 121a. In actual applications, the number and arrangement of the through holes 121a can be set as needed; the first flow channel 15a has a first flow port 151a and a second flow port 152a, and the second flow channel 15b has a first connecting port 151b and two second connecting ports 152b. In actual applications, the number of first flow ports 151a, the number of second flow ports 152a, the number of first connecting ports 151b and the number of second connecting ports 152b can all be set as needed.

[0099] As mentioned above, the structural design of the second flow channel 15b is related to the dynamic stiffness characteristics of the hydraulic mount 1 under small amplitude. The parameter characterizing the structural design of the second flow channel 15b can be the volume of the second flow channel 15b, which can be determined by the design of the flow channel length and the flow channel cross-sectional area. Figure 8In the example shown, the second flow channel 15b has a first communication port 151b and two second communication ports 152b. The two second communication ports 152b are symmetrical relative to the first communication port 151b. For the convenience of estimation and explanation, the diameters of the first communication port 151b and the second communication port 152b are set to be the same. In this way, the volume of the second flow channel 15b can be considered to be equal to the volume of the flow path from the first communication port 151b to the two second communication ports 152b. The first communication port 151b is adjacent to the left side ( Figure 8 The length of the flow channel between the first communication port 151b and the second communication port 152b on the right side is L1, and the length of the flow channel between the first communication port 151b and the second communication port 152b on the right side is L2. L1 and L2 are roughly the same, both 30 mm. It can be considered that the total flow channel length of the second flow channel 15b is L1+L2. According to the diameter Φ of the first communication port 151b = 12 mm, the cross-sectional area of ​​the flow channel can be estimated, and the volume of the second flow channel 15b can be determined in turn. In specific applications, the volume of the second flow channel 15b can be changed by adjusting the length or flow area of ​​the second flow channel 15b, thereby adjusting the dynamic stiffness characteristics of the hydraulic mount 1.

[0100] In specific settings, the length parameter of the second flow channel 15b is set to be greater than the length parameter of the first flow channel 15a.

[0101] The length parameter of the second flow channel 15b is the sum of the distances from each inlet end to each outlet end. Figures 7 to 9 Taking the flow channel assembly 12 shown in FIG. 1 as an example, the first communication port 151b is set as the inlet end of the second flow channel 15b, and the second communication port 152b is set as the outlet end of the second flow channel 15b. Figures 7 to 9 In the example shown, there is one first communication port 151 b and two second communication ports 152 b , so the length parameter of the second flow channel 15 b is the sum of the distances between the first communication port 151 and the two second communication ports 152 b .

[0102] The length parameter of the first flow channel 15a is the distance between the inlet and outlet of the first flow channel 15a in the arrangement direction of the upper chamber 14a and the lower chamber 14b. Figures 7 to 9 Taking the flow channel assembly 12 shown in FIG. 1 as an example, the first flow port 151a is set as the inlet end of the first flow channel 15a, and the second flow port 152a is set as the outlet end of the first flow channel 15a. Figure 5 As shown in the perspective, the upper chamber 14a and the lower chamber 14b are arranged in the vertical direction, so the length parameter of the first flow channel 15a is the distance between the first flow opening 151a and the second flow opening 152a in the vertical direction. In other words, Figure 7 and Fig. 9The structure of the flow channel component 12 shown can be considered that the first flow port 151a and the second flow port 152a are respectively located on the upper surface and the lower surface of the flow channel component 12, and the length parameter of the first flow channel 15a can be considered as the distance between the first flow port 151a and the second flow port 152 in the thickness direction of the flow channel component 12.

[0103] Apart from Figures 7 to 9 The flow channel assembly 12 shown in FIG. 1 may also have other structural forms, please refer to Fig.13 and Fig.14 , Fig.13 A three-dimensional diagram of a flow channel assembly in another embodiment provided by the present application; Fig.14 for Fig.13 A schematic cross-sectional view of the flow channel assembly shown.

[0104] In this embodiment, the flow channel assembly 12 includes a flow channel body 123 and a cover plate 121, wherein the formation method and shape of the first flow channel 15a are similar to those of Figures 7 to 9 In this embodiment, the second flow channel 15b is also located below the decoupling membrane 122, and is used to accommodate the installation chamber of the decoupling membrane 122 and the Figures 7 to 9 The structure in is similar and will not be repeated.

[0105] In this embodiment, the second flow channel 15b has only one first communication port 151b and one second communication port 152b. The second flow channel 15b penetrates the bottom wall of the installation groove and the bottom wall of the flow channel body 123. The second flow channel 15b is a structure of equal diameter holes, such as Fig.14 As shown, its diameter is Φ and the flow channel length is L. The flow channel volume can be adjusted according to these two parameters, thereby adjusting the dynamic stiffness characteristics. For example, the diameter Φ of the second flow channel 15b can be set to 14mm, and the flow channel length L can be set to 21mm. In this way, the flow channel cross-sectional area of ​​the second flow channel 15b is 154mm 2 .

[0106] exist Fig.13 and Fig.14 In the illustrated solution, the flow channel assembly 12 is not provided with a flow channel plate, and the structure is relatively simple.

[0107] In specific applications, the specific structural form of the flow channel component 12 can also be other, which will not be listed here one by one, as long as there is a first flow channel 15a that is always connected to the upper chamber 14a and the lower chamber 14b, and a second flow channel 15b that can be opened and closed autonomously according to the amplitude.

[0108] In specific settings, the length parameter of the second flow channel 15b is greater than the length parameter of the first flow channel 15a, wherein the length parameter of the second flow channel 15b is the sum of the distances from its each inlet end to each outlet end, and the length parameter of the first flow channel 15a is the distance between the inlet end and the outlet end of the first flow channel 15a in the arrangement direction of the upper chamber 14a and the lower chamber 14b.

[0109] Among them, the length parameter of the first flow channel 15a is the same as the aforementioned Figures 7 to 9 In this embodiment, the length parameter of the second flow channel 15b is actually Fig.14 The flow channel length L shown in FIG.

[0110] The above is a detailed introduction to a vehicle, a hydraulic suspension and a flow channel assembly provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A flow channel assembly of a hydraulic mount, characterized in that: The flow channel assembly comprises a first flow channel and a second flow channel which are not connected to each other, and the flow channel assembly comprises a decoupling membrane; The first flow channel is used to connect the upper chamber and the lower chamber of the hydraulic mount; The second flow channel can communicate the upper chamber and the lower chamber; The decoupling membrane has a free movement amount. When the decoupling membrane moves within its movement range, it can open or cut off the connecting path between the second flow channel and the upper chamber and the lower chamber. The decoupling membrane is configured to cut off the connecting path when excited by a first amplitude, and open the connecting path when excited by a second amplitude, and the first amplitude is greater than the second amplitude.

2. The flow channel assembly of the hydraulic mount according to claim 1, characterized in that: The flow channel assembly includes an installation chamber, the installation chamber and the second flow channel are connected in series between the upper chamber and the lower chamber, and the installation chamber is communicated with the second flow channel; the decoupling membrane is located in the installation chamber, and the decoupling membrane can move up and down between the top wall and the bottom wall of the installation chamber.

3. The flow channel assembly of the hydraulic mount according to claim 2, characterized in that: The installation chamber is arranged close to the upper chamber relative to the second flow channel; The cavity top wall has a through hole, and the through hole communicates with the installation cavity and the upper cavity; The second flow channel has a first communication port and a second communication port, the second flow channel is communicated with the installation chamber through the first communication port, and the second flow channel is communicated with the lower chamber through the second communication port; The decoupling film can open or close the first communication port when moving.

4. The flow channel assembly of the hydraulic mount according to claim 3, characterized in that: The flow channel assembly includes a flow channel body and a cover plate; at least a portion of the second flow channel is formed in the flow channel body; The flow channel body has a mounting groove with a notch facing upward, the cover plate blocks the notch, the mounting chamber is formed between the cover plate and the mounting groove, the through hole is provided on the cover plate, the first connecting port is provided on the bottom wall of the mounting groove, a flow space is formed between the decoupling membrane and the cavity wall of the mounting chamber, and the flow space can connect the through hole and the first connecting port.

5. The flow channel assembly of the hydraulic mount according to claim 4, characterized in that: The second flow channel includes a second flow channel cavity provided in the flow channel body, the flow channel body has a second flow channel groove with a second opening facing downward, the flow channel assembly also includes a flow channel plate, the flow channel plate is fixedly connected to the flow channel body, the flow channel plate blocks the second opening, the second flow channel cavity is formed between the flow channel plate and the second flow channel groove, and the second connecting port is provided in the flow channel plate.

6. The flow channel assembly of the hydraulic mount according to claim 5, characterized in that: The flow channel plate and the flow channel body are fixedly connected by interference fitting, riveting, welding or screwing.

7. The flow channel assembly of the hydraulic mount according to claim 4, characterized in that: The flow channel body has a first flow channel groove with a first opening facing upward, the cover plate also blocks the first opening, a first flow channel cavity is formed between the cover plate and the first flow channel groove, the cover plate has a first flow port, the first flow port connects the first flow channel cavity and the upper chamber, the flow channel body also has a second flow port, the second flow port connects the first flow channel cavity and the lower chamber; the first flow channel includes the first flow channel cavity, the first flow port and the second flow port.

8. The flow channel assembly of the hydraulic mount according to claim 7, characterized in that: The first flow channel cavity is an annular cavity, and the first flow channel cavity is arranged around the mounting groove.

9. The flow channel assembly of the hydraulic mount according to claim 4, characterized in that: The cover plate has more than two through holes.

10. The flow channel assembly of a hydraulic mount according to any one of claims 3 to 9, characterized in that: There are two or more first communication ports, and / or there are two or more second communication ports.

11. The flow channel assembly of a hydraulic mount according to any one of claims 1 to 9, characterized in that: The length parameter of the second flow channel is greater than the length parameter of the first flow channel; The length parameter of the second flow channel is the sum of the distances between each inlet end and each outlet end of the second flow channel; The length parameter of the first flow channel is the distance between the inlet end and the outlet end of the first flow channel in the arrangement direction of the upper chamber and the lower chamber.

12. A hydraulic mount, comprising a mount body, wherein the mount body comprises a rubber main spring, a flow channel assembly and a flow channel base, wherein: The flow channel component is the flow channel component described in any one of claims 1 to 11; the flow channel component is arranged between the rubber main spring and the flow channel base, an upper chamber is formed between the rubber main spring and the flow channel component, and a lower chamber is formed between the flow channel component and the flow channel base.

13. The hydraulic mount according to claim 12, characterized in that: It also includes a suspension shell and a suspension support arm, wherein the suspension shell is externally mounted on the suspension body, the suspension support arm is fixedly inserted into the suspension body, the suspension shell is used to be connected to the vehicle body, and the suspension support arm is used to be connected to the powertrain.

14. A vehicle comprising a body, a powertrain and a hydraulic mount, characterized in that: The hydraulic mount is the hydraulic mount according to claim 12 or 13, and the hydraulic mount is connected between the vehicle body and the powertrain.

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