Hydraulic bushing structure of auxiliary frame

Abstract

The invention discloses a hydraulic bushing structure of an auxiliary frame, which enables damping fluid to be in smooth transition in a flow channel, further reliably performs vibration reduction operation, and expands the application range of vibration reduction amplitude. The invention relates to a rubber spring assembly, which comprises a rubber main spring, the rubber main spring comprises a central framework, a peripheral framework and a rubber body, the rubber body is connected with the central framework and the peripheral framework, and two independent open cavities are formed on two sides of the rubber body; the plastic runner assembly comprises a first runner plate and a second runner plate, the first runner plate and the second runner plate are both arc-shaped runner plates, a first inlet and outlet is formed in the upper portion of the arc-shaped end of the first runner plate in the height direction, and a first runner groove which is concave in the thickness direction is formed in the outer surface of the first runner plate; a second inlet and outlet is formed in the lower portion of the arc-shaped end of the second runner plate in the height direction, and a second runner groove which is concave in the thickness direction is formed in the outer surface of the second runner plate. And a jacket.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic bushing structures, in particular to a hydraulic bushing structure of a subframe. Background Art

[0002] The subframe is the skeleton of the front and rear axles and is an integral part of the front and rear axles. The subframe is not a complete frame, but a bracket that supports the front and rear axles and suspension, so that the axles and suspension are connected to the "main frame" through it. The function of the subframe is to block vibration and noise and reduce its direct entry into the car. Existing subframes all use hydraulic bushing structures to perform vibration reduction operations.

[0003] Hydraulic bushings are a type of vibration-damping component widely used in automobiles. Compared with traditional rubber bushings, hydraulic bushings can provide greater viscous damping characteristics within a specific frequency range, thereby improving vehicle driving stability and safety.

[0004] The existing hydraulic bushing is mainly composed of a rubber main spring, a plastic flow channel assembly, a jacket and a damping fluid, wherein the rubber main spring is made of a rubber vulcanized central skeleton and a peripheral skeleton into a whole, and the plastic flow channel is used to circulate the viscous liquid in the two liquid chambers isolated on the rubber main spring, so that when the pressure difference between the two liquid chambers of the hydraulic bushing increases sharply, the pressure difference on both sides is adjusted by the flow of the damping fluid in the plastic flow channel. The setting positions of the inlets and outlets of the plastic flow channel connecting the liquid chambers on both sides of the prior art correspond to the middle position in the height direction of the liquid chamber. When the pressure difference is actually adjusted, when the damping fluid receives upper and lower pressures, the liquid chambers on both sides will squeeze the damping fluid into the corresponding inlets and outlets, thereby causing the damping fluid to have a greater impact in the flow channel, causing the jacket used to wrap the outer surface of the flow channel to bear a greater impact force, resulting in the need to thicken the jacket; and when the impact force of the damping fluid in the flow channel is large, the damping fluid body will vibrate in the flow channel, thereby further increasing the overall vibration, which will have a negative effect on vibration reduction. In order to ensure that the hydraulic bushing can reliably reduce vibration, it is urgent to develop a new hydraulic bushing structure. Summary of the invention

[0005] In view of the above problems, the present invention provides a hydraulic bushing structure of a subframe, which allows the damping fluid to smoothly transition in the flow channel, thereby reliably performing vibration reduction operations and expanding the applicable range of the vibration reduction amplitude.

[0006] A hydraulic bushing structure of a subframe, characterized in that it comprises: A rubber main spring, comprising a central frame, a peripheral frame, and a rubber body, wherein the rubber body is connected to the central frame and the peripheral frame, and two independent open cavities are formed on both sides of the rubber body; A plastic flow channel assembly, comprising a first flow channel plate and a second flow channel plate, both of which are arc-shaped flow channel plates, a first inlet and a second inlet are arranged at an upper position in the height direction of one arc-shaped end of the first flow channel plate, a first flow channel groove concave in the thickness direction is arranged on the outer surface of the first flow channel plate, the first flow channel groove extends from the first inlet and a second inlet toward the middle position in the height direction of the other arc-shaped end of the first flow channel plate, and forms a first guide notch, a second inlet and a second inlet are arranged at a lower position in the height direction of one arc-shaped end of the second flow channel plate, a second flow channel groove concave in the thickness direction is arranged on the outer surface of the second flow channel plate, the second flow channel groove extends from the second inlet and a second inlet toward the middle position in the height direction of the other arc-shaped end of the second flow channel plate, and forms a second guide notch; and coats; The exposed rubber body is divided into a top rubber mechanism, a center area rubber mechanism, and a bottom rubber mechanism in the height direction. The center area rubber mechanism includes a center baffle and arc-shaped baffles on both sides. The center baffle, the arc-shaped baffles on both sides, the top rubber mechanism, and the bottom rubber mechanism enclose two independent open cavities. The first flow channel plate and the second flow channel plate are respectively covered on the outer ends of the corresponding open cavities, so that the two open cavities become corresponding liquid chambers. The first guide notch and the second guide notch are connected, and the first flow channel groove and the second flow channel groove are combined to form a damping liquid flow channel groove. The outer sleeve is set on the outer surfaces of the first flow channel plate and the second flow channel plate; The outer sleeve is sleeved on the remaining outer circumference of the upper flange positioning mechanism of the rubber main spring excluding the top rubber mechanism, and the inner wall of the corresponding area of ​​the outer sleeve is arranged in close contact with the outer surfaces of the first flow channel plate and the second flow channel plate.

[0007] It is further characterized by: The top rubber mechanism includes a lower peripheral sealing ring, the bottom rubber mechanism includes an upper peripheral sealing ring, the upper inner wall of the outer sleeve is in close contact with the lower peripheral sealing ring of the top rubber mechanism, the lower inner wall of the outer sleeve is in close contact with the upper peripheral sealing ring of the bottom rubber mechanism, and the inner wall in the central area of ​​the outer sleeve is in close contact with the outer surfaces of the first flow channel plate and the second flow channel plate, so as to ensure reliable sealing assembly of the outer sleeve; The first flow channel includes a first upper horizontal flow channel, a first descending flow channel, and a first middle horizontal flow channel. The second flow channel includes a second middle horizontal flow channel, a second descending flow channel, and a first lower horizontal flow channel. The first upper horizontal flow channel is connected to the first middle horizontal flow channel through the first descending flow channel. The first middle horizontal flow channel and the second middle horizontal flow channel are located at the same height and are interconnected in a combined state. The second middle horizontal flow channel is connected to the first lower horizontal flow channel through the second descending flow channel, so that the entire damping liquid flow channel is reliably arranged. The depth and width of the first flow channel groove and the second flow channel groove are the same, ensuring that the pressure is stable and reliable without generating additional vibration; Preferably, except for the position close to the first inlet and outlet, at least one dividing baffle is further provided in the remaining flow channel grooves of the first flow channel groove, and the dividing baffle divides the first flow channel groove into a plurality of divided flow chambers with the same width; except for the position close to the second inlet and outlet, at least one dividing baffle is further provided in the remaining flow channel grooves of the second flow channel groove, and the dividing baffle divides the second flow channel groove into a plurality of divided flow chambers with the same width; the number of dividing baffles in the first flow channel groove and the second flow channel groove is the same; the divided flow chambers at corresponding height positions of the first flow channel groove and the second flow channel groove are interconnected and arranged; the outer surfaces of the corresponding dividing baffles are arranged closely against the inner wall of the outer sleeve; the dividing baffles are used to reliably reduce the pressure of the damping liquid flow channel groove for the first time, and to reduce the pressure of the damping liquid flowing out of the damping liquid flow channel groove again, so as to improve the vibration reduction effect of the entire hydraulic bushing; The liquid chamber corresponding to the first flow channel plate is the first liquid chamber, and the liquid chamber corresponding to the second flow channel plate is the second liquid chamber; the arc-shaped baffles on both sides are the first arc-shaped baffle and the second arc-shaped baffle; The first arc-shaped baffle corresponds to the joint position of the first guide groove of the first flow channel plate and the second guide groove of the second flow channel plate, the outer surface of the second arc-shaped baffle is provided with a stop column, the outer surface of the stop column is an arc surface, and the first guide cavity and the second guide cavity are respectively provided on both sides of the stop column, and the corresponding position of the outer sleeve is provided with a concave contoured arc groove, and the concave contoured arc groove is arranged to fit the outer surface of the stop column, and the first guide cavity and the second guide cavity are separated to form two independent cavities, and the first flow channel plate is provided with a first notch groove in the middle of the height direction corresponding to the position area of ​​the second arc-shaped baffle, and the first notch groove is retracted along the arc length direction to the surface area position of the first liquid chamber to form a first pressure relief channel opening, and the first liquid chamber passes through the first pressure relief channel opening, The first notch groove is connected to the first guide cavity, and the second flow channel plate is provided with a retracted second notch groove in the middle of the height direction corresponding to the position area of ​​the second arc-shaped baffle plate. The second notch groove is retracted along the arc length direction to the surface area position of the second liquid chamber to form a second pressure relief channel opening. The second liquid chamber is connected to the second guide cavity through the second pressure relief channel opening and the second notch groove. When the hydraulic pressure difference on both sides is too large and the pressure difference cannot be reliably relieved only through the damping liquid flow channel groove, the damping liquid on the side with greater pressure will form a gap between the concave contoured arc groove and the stop spacer column, thereby forming a passage, so that part of the damping liquid completes the pressure relief operation through the passage, which ensures the vibration reduction effect of the entire mechanism. Since the stop spacer column is made of plastic material, it has a reliable reset function and will not affect the normal vibration reduction function under other working conditions. Preferably, the stop column comprises an upper column and a lower column, the upper column comprises a first extended reinforcement portion close to the first notch groove, and a first inner end concave guide portion close to the second notch groove, and since the upper column mainly corresponds to the damping fluid of the upper pressure relief, such arrangement ensures reliable pressure relief; The lower partition column includes a second extended reinforcement portion close to the second notch groove and a second inner end concave guide portion close to the first notch groove. Since the lower partition column mainly corresponds to the damping liquid for lower pressure relief, such arrangement ensures reliable pressure relief; The inner volume of the first liquid chamber is larger than that of the second liquid chamber. In the actual vibration reduction process, the vibration transmitted from the bottom of the wheel to the vehicle body is generally greater than the pressure transmitted from the vehicle body to the bottom of the wheel. Therefore, the total volume of the damping liquid arranged in the first liquid chamber is larger than the total volume of the damping liquid arranged in the second liquid chamber, thereby optimizing the actual vibration reduction effect. The different inner cavity volumes of the two liquid chambers are set by the volume of the protrusions of the central baffle corresponding to each liquid chamber, the protrusion of the central baffle corresponding to the first liquid chamber is a first protrusion, and the protrusion of the central baffle corresponding to the second liquid chamber is a second protrusion, and the volume of the first protrusion is smaller than the volume of the second protrusion, so that the inner cavity volume of the first liquid chamber is larger than the inner cavity volume of the second liquid chamber; Preferably, the inner convex thicknesses of the first convex block and the second convex block are different, and the inner convex thickness of the first convex block is smaller than that of the second convex block; The first protrusion block and the second protrusion block are both arranged in the middle position area in the height direction of the liquid chamber, and the inner facades of the first protrusion block and the second protrusion block are also provided with a plurality of vertically penetrating inner concave guide grooves, and the exposed edges of the first protrusion block and the second protrusion block are both arc transitions to ensure smooth passage of the damping liquid; The inner surfaces of the corresponding liquid chambers of the first flow channel plate and the second flow channel plate are both provided with thickened protrusions, and the height positions of the thickened protrusions correspond to the corresponding height positions of the first protrusion blocks and the second protrusion blocks. The thickened protrusions and the corresponding first protrusion blocks and the second protrusion blocks form a narrow flow channel, which enables the damping liquid passing through the narrow flow channel to reliably resolve the vibration, thereby further ensuring the vibration reduction effect.

[0008] After adopting the structure of the present invention, the damping liquid is injected into the two liquid chambers, and the damping liquid flow channel groove is set as an upper inlet and outlet (first inlet and outlet) and a lower inlet and outlet (second inlet and outlet). The first flow channel groove and the second flow channel groove with the function of slow descent or slow rise are combined to form flow channels that circulate with each other, so that when the hydraulic bushing structure is subjected to vibration from the ground, the damping liquid flows from the first inlet and outlet along the damping liquid flow channel groove to the second inlet and outlet, and when the vibration is transmitted from the upper side to the lower side, the damping liquid flows from the second inlet and outlet along the damping flow channel groove to the first inlet and outlet, which makes the damping liquid in the damping liquid flow channel groove flow unidirectionally and continuously switches the flow direction, and the flow of the damping liquid is used to relieve pressure and reduce vibration; because the damping liquid in the damping liquid flow channel groove is always flowing in a unidirectional manner for damping and vibration reduction, it is ensured that the damping liquid in the damping liquid flow channel groove will not generate mixed flow vibration in the damping liquid flow channel groove, which makes the damping liquid transition smoothly in the flow channel, and then reliably performs vibration reduction operation, thereby expanding the applicable range of the vibration reduction amplitude. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 Explosion of the stereogram of the present invention Figure 1 ; Figure 3 Explosion of the stereogram of the present invention Figure 2 ; Figure 4 for Figure 1 A top view of Figure 5 for Figure 1 The main view; Figure 6 for Figure 4 Schematic diagram of AA cross-sectional structure; Figure 7 for Figure 5 Schematic diagram of BB cross-sectional structure; Figure 8 for Figure 5 Schematic diagram of CC cross-sectional structure; Fig. 9 for Figure 6 Schematic diagram of DD cross-sectional structure; Fig.10 The present invention removes the outer cover of the three-dimensional Figure 1 ; Fig.11 The present invention removes the outer cover of the three-dimensional Figure 2 ; Fig.12 The present invention removes the outer cover of the three-dimensional Figure 3 ; Fig.13 The present invention removes the outer cover of the three-dimensional Figure 4 ; Fig.14 It is a structural schematic diagram of a first flow channel groove provided with a separation baffle; The names corresponding to the serial numbers in the figure are as follows: Partition flow chamber 1, first liquid chamber 2, second liquid chamber 3, first arc-shaped baffle plate 4, second arc-shaped baffle plate 5, stop column 6, arc surface 601, upper column 602, lower column 603, first extension reinforcement portion 604, first inner end concave guide portion 605, second extension reinforcement portion 606, second inner end concave guide portion 607, first guide chamber 7, second guide chamber 8, thickened protrusion 9, narrow flow channel 91; Central frame 10, peripheral frame 20, rubber body 30, partition bar 40, first flow channel plate 50, first inlet and outlet 51, first flow channel groove 52, first upper horizontal flow channel groove 521, first descending flow channel groove 522, first middle horizontal flow channel groove 523, first guide notch 53, first notch 54, first pressure relief channel opening 55, second flow channel plate 60, second inlet and outlet 61, second flow channel groove 62, second middle horizontal flow channel groove 621, second descending flow channel groove 622, first lower horizontal flow channel groove 623, second guide notch 63, second notch 64, second pressure relief channel opening 65, central baffle 70, first protruding block 71, second protruding block 72, inner concave guide groove 73, damping liquid flow channel groove 80; Rubber main spring 100, top rubber mechanism 101, first concave stop positioning groove 1011, central area rubber mechanism 102, bottom rubber mechanism 103, second concave stop positioning groove 1031, upper flange positioning mechanism 104, lower peripheral sealing ring 105, upper peripheral sealing ring 106, plastic flow channel assembly 200, outer sleeve 300, concave contoured arc groove 301. DETAILED DESCRIPTION

[0010] A hydraulic bushing structure for a subframe, see Figure 1-Figure 14 , which includes a rubber main spring 100, a plastic flow channel component 200, and a jacket 300; The rubber main spring 100 includes a central frame 10, a peripheral frame 20, and a rubber body 30. The rubber body 30 connects the central frame 10 and the peripheral frame 20. Two independent open cavities are formed on both sides of the rubber body 30. The plastic flow channel assembly 200 includes a first flow channel plate 50 and a second flow channel plate 60. Both the first flow channel plate 50 and the second flow channel plate 60 are arc-shaped flow channel plates. A first inlet and outlet 51 is provided at the upper position in the height direction of one arc-shaped end of the first flow channel plate 50. A first flow channel groove 52 is provided on the outer surface of the first flow channel plate 50, which is concave in the thickness direction. The first flow channel groove 52 extends from the first inlet and outlet 51 toward the middle position in the height direction of the other arc-shaped end of the first flow channel plate 50 and forms a first guide notch 53. A second inlet and outlet 61 is provided at the lower position in the height direction of one arc-shaped end of the second flow channel plate 60. A second flow channel groove 62 is provided on the outer surface of the second flow channel plate 60, which is concave in the thickness direction. The second flow channel groove 62 extends from the second inlet and outlet 61 toward the middle position in the height direction of the other arc-shaped end of the second flow channel plate 60 and forms a second guide notch 63. The rubber main spring 100 is formed after the rubber body 30 is vulcanized on the central skeleton 10 and the peripheral skeleton 20. The exposed rubber body 30 is divided into a top rubber mechanism 101, a central region rubber mechanism 102, and a bottom rubber mechanism 103 in the height direction. The central region rubber mechanism 102 includes a central baffle 70 and arc-shaped baffles on both sides. The central baffle 70, the arc-shaped baffles on both sides, the top rubber mechanism 101, and the bottom rubber mechanism 103 are enclosed to form two independent open cavities. The first flow channel plate 50 and the second flow channel plate 60 are respectively covered on the outer ends of the corresponding open cavities, so that the two open cavities become corresponding liquid chambers. The first guide notch 53 and the second guide notch 63 are connected, and the first flow channel groove 52 and the second flow channel groove 62 are combined to form a damping liquid flow channel groove 80. The outer sleeve 300 is sleeved on the outer surfaces of the first flow channel plate 50 and the second flow channel plate 60. The outer sleeve 300 is sleeved on the outer circumference of the rubber main spring 100 except the upper flange positioning mechanism 104 of the top rubber mechanism 101 , and the inner wall of the corresponding area of ​​the outer sleeve 300 is arranged in close contact with the outer surfaces of the first flow channel plate 50 and the second flow channel plate 60 .

[0011] In a specific embodiment, the top rubber mechanism 101 includes a lower peripheral sealing ring 105, the bottom rubber mechanism 103 includes an upper peripheral sealing ring 106, the upper inner wall of the outer jacket 300 is in close contact with the lower peripheral sealing ring 105 of the top rubber mechanism 101, the lower inner wall of the outer jacket 300 is in close contact with the upper peripheral sealing ring 106 of the bottom rubber mechanism 103, and the inner wall of the central area of ​​the outer jacket 300 is in close contact with the outer surfaces of the first flow channel plate 50 and the second flow channel plate 60, so as to ensure reliable sealing assembly of the outer jacket 300; The first flow channel 52 includes a first upper horizontal flow channel 521, a first descending flow channel 522, and a first middle horizontal flow channel 523. The second flow channel 62 includes a second middle horizontal flow channel 621, a second descending flow channel 622, and a first lower horizontal flow channel 623. The first upper horizontal flow channel 521 is connected to the first middle horizontal flow channel 523 through the first descending flow channel 522. The first middle horizontal flow channel 523 and the second middle horizontal flow channel 621 are located at the same height and are interconnected in the combined state. The second middle horizontal flow channel 621 is connected to the first lower horizontal flow channel 623 through the second descending flow channel 622, which enables the entire damping liquid flow channel 80 to be reliably arranged. The first flow channel groove 52 and the second flow channel groove 62 have the same depth and width, which ensures that the pressure is stable and reliable without generating additional vibration.

[0012] Preferred embodiment (see Fig.14 ), except for the position near the first inlet and outlet 51, the first flow channel groove 52 is also provided with a dividing baffle 40 in the remaining flow channel grooves, and the dividing baffle 40 divides the first flow channel groove into two groups of divided flow chambers 1 with the same width. Except for the position near the second inlet and outlet 61, the second flow channel groove 62 is also provided with a dividing baffle 40 in the remaining flow channel grooves, and the dividing baffle 40 divides the second flow channel groove 62 into two groups of divided flow chambers 1 with the same width. The divided flow chambers 1 at corresponding height positions of the first flow channel groove 52 and the second flow channel groove 62 are arranged in correspondence and communication with each other, and the outer surface of the corresponding dividing baffle 40 is arranged close to the inner wall of the outer sleeve 300, and the dividing baffle 40 is used to reliably reduce the pressure of the damping liquid flow channel groove 80 that initially flows into the damping liquid flow channel groove 80, and to reduce the pressure of the damping liquid that flows out of the damping liquid flow channel groove 80 again to flow out, thereby improving the vibration reduction effect of the entire hydraulic bushing.

[0013] In the specific embodiment, the liquid chamber corresponding to the first flow channel plate 50 is the first liquid chamber 2, and the liquid chamber corresponding to the second flow channel plate 60 is the second liquid chamber 3; the arc-shaped baffles on both sides are the first arc-shaped baffle 4 and the second arc-shaped baffle 5; The first arc-shaped baffle plate 4 is arranged at the joint position of the first guide groove 53 of the first flow channel plate 50 and the second guide groove 63 of the second flow channel plate 60. The outer surface of the second arc-shaped baffle plate 5 is provided with a stop column 6. The outer surface of the stop column 6 is an arc surface 601. The first guide cavity 7 and the second guide cavity 8 are respectively arranged on both sides of the stop column 6. The corresponding position of the outer sleeve 300 is provided with a concave contoured arc groove 301. The concave contoured arc groove 301 is arranged in contact with the arc surface 601 of the stop column 6. The first guide cavity 7 and the second guide cavity 8 are separated to form two independent cavities. The first flow channel plate 50 is provided with a retracted first notch groove 54 in the middle of the height direction of the position area corresponding to the second arc-shaped baffle plate 5. The first notch groove 54 is retracted along the arc length direction to the surface area position of the first liquid chamber 2 to form a first pressure relief channel opening 55. The first liquid chamber 2 passes through the first pressure relief channel opening 5 5. The first notch groove 54 is connected to the first guide cavity 7. The second flow channel plate 60 is provided with a retracted second notch groove 64 in the middle of the height direction of the position area corresponding to the second arc-shaped baffle plate 5. The second notch groove 64 is retracted along the arc length direction to the surface position of the second liquid chamber 3 to form a second pressure relief channel opening 65. The second liquid chamber 3 is connected to the second guide cavity 8 through the second pressure relief channel opening 65 and the second notch groove 64. When the hydraulic pressure difference on both sides is too large and the pressure difference cannot be reliably relieved only through the damping liquid flow channel groove 80, the damping liquid on the side with greater pressure will form a gap between the concave contoured arc groove 301 and the stop partition column 6, and then form a passage, so that part of the damping liquid completes the pressure relief operation through the passage, which ensures the vibration reduction effect of the entire mechanism. Moreover, since the stop partition column 6 is made of plastic, it has a reliable reset function and will not affect the normal vibration reduction function under other working conditions.

[0014] In the preferred embodiment, the stopper column 6 includes an upper column 602 and a lower column 603. The upper column 602 includes a first extended reinforcement portion 604 near the first notch groove 54 and a first inner end concave guide portion 605 near the second notch groove 64. Since the upper column 602 mainly corresponds to the damping liquid of the upper pressure relief at the upper position, it is arranged in this way to ensure reliable pressure relief. The lower partition column 603 includes a second extended reinforcement portion 606 near the second notch groove 64 and a second inner end concave guide portion 607 near the first notch groove 54. Since the lower partition column 603 mainly corresponds to the damping fluid of the lower pressure relief at the lower position, it is arranged in this way to ensure reliable pressure relief; The structure of the stop partition column 6 allows the high-pressure damping liquid in the first liquid chamber 2 to be reliably depressurized along the upper partition column 602, and the high-pressure damping liquid in the second liquid chamber 3 to be reliably depressurized along the lower partition column 603, while the reverse pressure relief is cut off and cannot be carried out due to the existence of the concave guide part at the inner end.

[0015] In a specific embodiment, the inner cavity volume of the first liquid chamber 2 is larger than the inner cavity volume of the second liquid chamber 3. In the actual vibration reduction process, the vibration transmitted from the bottom of the wheel to the vehicle body is generally greater than the pressure transmitted from the vehicle body to the bottom of the wheel. Therefore, the total volume of the damping fluid arranged in the first liquid chamber 2 is larger than the total volume of the damping fluid arranged in the second liquid chamber 3, thereby optimizing the actual vibration reduction effect.

[0016] In a specific embodiment, the different inner cavity volumes of the two liquid chambers are set by the volume of the protruding block of each liquid chamber corresponding to the central baffle. The protruding portion of the central baffle 70 corresponding to the first liquid chamber 2 is the first protruding block 71, and the protruding portion of the central baffle 70 corresponding to the second liquid chamber 3 is the second protruding block 72. The volume of the first protruding block 71 is smaller than the volume of the second protruding block 72, so that the inner cavity volume of the first liquid chamber 2 is larger than the inner cavity volume of the second liquid chamber 3. In specific implementation, the protruding positions of the first protruding block 71 and the second protruding block 72 are the same, so that the inner convex thickness of the first protruding block 71 is smaller than the second protruding block 72, which can ensure that the inner cavity volume of the first liquid chamber 2 is larger than the inner cavity volume of the second liquid chamber 3.

[0017] In a preferred embodiment, the first protruding block 71 and the second protruding block 72 are both arranged in the middle position area in the height direction of the liquid chamber, and the inner facades of the first protruding block 71 and the second protruding block 72 are also provided with a plurality of vertically penetrating inner concave guide grooves 73, and the exposed edges of the first protruding block 71 and the second protruding block 72 are both arc transitions to ensure smooth passage of the damping liquid; The inner surfaces of the corresponding liquid chambers of the first flow channel plate 50 and the second flow channel plate 60 are both provided with thickened protrusions 9, and the height positions of the thickened protrusions 9 correspond to the corresponding height positions of the first protrusion blocks 71 and the second protrusion blocks 72. The thickened protrusions 9 and the corresponding first protrusion blocks 71 and the second protrusion blocks 72 form a narrow flow channel 91, which enables the damping liquid passing through the narrow flow channel 91 to reliably resolve the vibration, thereby further ensuring the vibration reduction effect.

[0018] In specific implementation, the lower edge of the top rubber mechanism 101 is respectively provided with a first concave stop positioning groove 1011 corresponding to the upper edge area of ​​the first flow channel plate 50 and the second flow channel plate 60, and the upper edge of the bottom rubber mechanism 103 is respectively provided with a second concave stop positioning groove 1031 corresponding to the lower edge area of ​​the first flow channel plate 50 and the second flow channel plate 60. The upper and lower edges of the first flow channel plate 50 and the second flow channel plate 60 are respectively positioned at the first concave stop positioning groove 1011 and the second concave stop positioning groove 1031 at corresponding positions, and the end edges of the first flow channel plate 50 and the second flow channel plate 60 corresponding to the first guide slot 53 and the second guide slot 63 are tightly arranged to ensure quick and convenient assembly.

[0019] Its working principle is as follows: the damping liquid flow channel groove is set as an upper inlet and outlet (first inlet and outlet) and a lower inlet and outlet (second inlet and outlet), and the first flow channel groove with a slow descent or slow rise function and the second flow channel groove are combined to form a flow channel that circulates with each other, so that when subjected to vibration from the ground, the bottom of the damping liquid is the force-bearing surface to perform a damping action, and finally the damping liquid on the upper layer becomes a pressure relief liquid, and then the damping liquid on the upper layer flows from the first inlet and outlet along the damping liquid flow channel groove to the second inlet and outlet. When the vibration is converted from the upper side to the lower side, the damping liquid flows from the second inlet and outlet along the damping flow channel groove to the first inlet and outlet; when the vehicle body transmits vibration to the ground, the upper force-bearing surface of the damping liquid performs a damping action, and finally the lower The damping liquid in the upper layer becomes the pressure relief liquid, and then the damping liquid in the lower layer flows from the second inlet and outlet along the damping liquid flow channel groove to the first inlet and outlet. When the vibration is converted from the lower side to the upper side, the damping liquid flows from the first inlet and outlet along the damping liquid flow channel groove to the second inlet and outlet. It enables the damping liquid in the damping liquid flow channel groove to flow rapidly in one direction and continuously switch the flow direction, and reliably performs pressure relief and vibration reduction through the flow of the damping liquid. Since the damping liquid in the damping liquid flow channel groove always performs one-way damping and vibration reduction flow, it ensures that the damping liquid in the damping liquid flow channel groove will not generate mixed flow vibration in the damping liquid flow channel groove, and it enables the damping liquid to smoothly transition in the flow channel, and then reliably performs vibration reduction operation. It also expands the applicable range of the amplitude of vibration reduction. In addition, when the vibration is greater than the limit of vibration reduction by only flowing the damping fluid through the damping fluid flow channel groove, the damping fluid at the pressure end will cause a gap to form between the concave contoured arc groove and the stop partition column, thereby forming a passage, so that part of the damping fluid can complete the pressure relief operation through the passage, which further expands the applicable range of the vibration reduction amplitude.

[0020] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0021] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A hydraulic bushing structure of a subframe, characterized in that: It includes: A rubber main spring, comprising a central frame, a peripheral frame, and a rubber body, wherein the rubber body is connected to the central frame and the peripheral frame, and two independent open cavities are formed on both sides of the rubber body; A plastic flow channel assembly, comprising a first flow channel plate and a second flow channel plate, both of which are arc-shaped flow channel plates, a first inlet and a second inlet are arranged at an upper position in the height direction of one arc-shaped end of the first flow channel plate, a first flow channel groove concave in the thickness direction is arranged on the outer surface of the first flow channel plate, the first flow channel groove extends from the first inlet and a second inlet toward the middle position in the height direction of the other arc-shaped end of the first flow channel plate, and forms a first guide notch, a second inlet and a second inlet are arranged at a lower position in the height direction of one arc-shaped end of the second flow channel plate, a second flow channel groove concave in the thickness direction is arranged on the outer surface of the second flow channel plate, the second flow channel groove extends from the second inlet and a second inlet toward the middle position in the height direction of the other arc-shaped end of the second flow channel plate, and forms a second guide notch; and coats; The exposed rubber body is divided into a top rubber mechanism, a center area rubber mechanism, and a bottom rubber mechanism in the height direction. The center area rubber mechanism includes a center baffle and arc-shaped baffles on both sides. The center baffle, the arc-shaped baffles on both sides, the top rubber mechanism, and the bottom rubber mechanism enclose two independent open cavities. The first flow channel plate and the second flow channel plate are respectively covered on the outer ends of the corresponding open cavities, so that the two open cavities become corresponding liquid chambers. The first guide notch and the second guide notch are connected, and the first flow channel groove and the second flow channel groove are combined to form a damping liquid flow channel groove. The outer sleeve is set on the outer surfaces of the first flow channel plate and the second flow channel plate; The outer sleeve is sleeved on the remaining outer circumference of the upper flange positioning mechanism of the rubber main spring excluding the top rubber mechanism, and the inner wall of the corresponding area of ​​the outer sleeve is arranged in close contact with the outer surfaces of the first flow channel plate and the second flow channel plate.

2. The hydraulic bushing structure of a subframe according to claim 1, characterized in that: The top rubber mechanism includes a lower peripheral sealing ring, the bottom rubber mechanism includes an upper peripheral sealing ring, the upper inner wall of the outer sleeve is in close contact with the lower peripheral sealing ring of the top rubber mechanism, the lower inner wall of the outer sleeve is in close contact with the upper peripheral sealing ring of the bottom rubber mechanism, and the inner wall in the central area of ​​the outer sleeve is arranged in close contact with the outer surfaces of the first flow channel plate and the second flow channel plate.

3. The hydraulic bushing structure of a subframe according to claim 1, characterized in that: The first flow channel includes a first upper horizontal flow channel, a first descending flow channel, and a first middle horizontal flow channel; the second flow channel includes a second middle horizontal flow channel, a second descending flow channel, and a first lower horizontal flow channel; the first upper horizontal flow channel is connected to the first middle horizontal flow channel through the first descending flow channel; the first middle horizontal flow channel and the second middle horizontal flow channel are located at the same height and are interconnected in a combined state; the second middle horizontal flow channel is connected to the first lower horizontal flow channel through the second descending flow channel.

4. The hydraulic bushing structure of a subframe according to claim 3, characterized in that: Except for the position near the first inlet and outlet, the other flow channels of the first flow channel are further provided with at least one dividing baffle, and the dividing baffle divides the first flow channel into a plurality of groups of divided flow chambers with the same width. Except for the position near the second inlet and outlet, the other flow channels of the second flow channel are further provided with at least one dividing baffle, and the dividing baffle divides the second flow channel into a plurality of groups of divided flow chambers with the same width. The number of dividing baffles in the first flow channel and the second flow channel are the same, and the divided flow chambers at corresponding height positions of the first flow channel and the second flow channel are arranged to be interconnected, and the outer surfaces of the corresponding dividing baffles are arranged close to the inner wall of the outer sleeve.

5. The hydraulic bushing structure of a subframe according to claim 1, characterized in that: The liquid chamber corresponding to the first flow channel plate is the first liquid chamber, and the liquid chamber corresponding to the second flow channel plate is the second liquid chamber; the arc-shaped baffles on both sides are the first arc-shaped baffle and the second arc-shaped baffle.

6. The hydraulic bushing structure of a subframe according to claim 5, characterized in that: The first arc-shaped baffle plate corresponds to the joint position of the first guide notch of the first flow channel plate and the second guide notch of the second flow channel plate, the outer surface of the second arc-shaped baffle plate is provided with a stop column, the outer surface of the stop column is an arc surface, and the first guide cavity and the second guide cavity are respectively provided on both sides of the stop column, and the corresponding position of the outer sleeve is provided with an inwardly concave contoured arc groove, and the inwardly concave contoured arc groove is arranged in contact with the outer surface of the stop column, and the first guide cavity and the second guide cavity are separated to form two independent cavities, and the first flow channel plate corresponds to the position area of ​​the second arc-shaped baffle plate in the height direction. A retracted first notch groove is provided on the part, and the first notch groove is retracted along the arc length direction to the surface area position of the first liquid chamber to form a first pressure relief channel opening, and the first liquid chamber is connected to the first guide cavity through the first pressure relief channel opening and the first notch groove, and a retracted second notch groove is provided in the middle part of the height direction of the position area of ​​the second arc-shaped baffle plate corresponding to the second flow channel plate, and the second notch groove is retracted along the arc length direction to the surface area position of the second liquid chamber to form a second pressure relief channel opening, and the second liquid chamber is connected to the second guide cavity through the second pressure relief channel opening and the second notch groove.

7. The hydraulic bushing structure of a subframe according to claim 6, characterized in that: The stop column comprises an upper column and a lower column, wherein the upper column comprises a first extending reinforcement portion close to the first notch groove and a first inner end concave guide portion close to the second notch groove; The lower partition column includes a second extended reinforcing portion close to the second notch groove and a second inner end concave guiding portion close to the first notch groove.

8. The hydraulic bushing structure of a subframe according to claim 5, characterized in that: The inner volume of the first liquid chamber is greater than the inner volume of the second liquid chamber.

9. The hydraulic bushing structure of a subframe according to claim 8, characterized in that: The different inner cavity volumes of the two liquid chambers are set by the volume of the protruding block of each liquid chamber corresponding to the central partition. The protruding portion of the central partition corresponding to the first liquid chamber is a first protruding block, and the protruding portion of the central partition corresponding to the second liquid chamber is a second protruding block. The volume of the first protruding block is smaller than the volume of the second protruding block, so that the inner cavity volume of the first liquid chamber is larger than the inner cavity volume of the second liquid chamber.

10. The hydraulic bushing structure of a subframe according to claim 9, characterized in that: The inner convex thicknesses of the first convex block and the second convex block are different, and the inner convex thickness of the first convex block is smaller than that of the second convex block; The first protrusion block and the second protrusion block are both arranged in the middle position area in the height direction of the liquid chamber. The inner facades of the first protrusion block and the second protrusion block are also provided with a plurality of vertically penetrating concave guide grooves. The exposed edges of the first protrusion block and the second protrusion block are both arc transitions.

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