Double rubber hydraulic bushing

Abstract

This embodiment relates to a dual-rubber hydraulic bushing, based on a medium inner tube and a main spring rubber section, with one liquid chamber and another liquid chamber arranged 180 degrees along the central axis of the medium inner tube. The space within the main spring rubber section is one liquid chamber. The space within the flow channel plate is the other liquid chamber. The two liquid chambers are connected by an inertial channel, and both are filled with damping fluid. When one side of the dual-rubber hydraulic bushing is subjected to an external load, the liquid chamber is compressed, and the fluid flows through the inertial channel to the other liquid chamber. During the fluid flow, the fluid overcomes the surface friction of the inertial channel, thereby converting the energy of external vibrations into heat energy, which is released into the atmosphere, thus achieving the purpose of vibration reduction and noise reduction. The dual-rubber hydraulic bushing simultaneously addresses and solves the vibration reduction and noise reduction performance as well as the durability performance of hydraulic bushings. The dual-rubber hydraulic bushing can meet the durability requirements of hydraulic bushings while ensuring their vibration reduction and noise reduction performance, improving the overall NVH performance of new energy vehicles.

Description

Technical Field

[0001] This application relates to the field of hydraulic bushing technology, and in particular to a double rubber hydraulic bushing. Background Technology

[0002] The commercial vehicle market is placing increasingly higher demands on the noise, vibration, and ride comfort performance of passenger vehicles, while the market demand for new energy vehicles is expected to continue to grow. Due to range constraints, the battery weight of new energy vehicles far exceeds that of the engine in traditional gasoline vehicles, resulting in an increase in overall vehicle weight. New energy vehicles experience excessive dynamic loads, and traditional double rubber bushings cannot provide the high-damping mechanical support required by conventional methods, while traditional hydraulic bushings cannot meet the heavy load requirements of new energy vehicles. Therefore, it is necessary to propose a double rubber hydraulic bushing to address the limitations of traditional hydraulic bushings in new energy vehicles. Utility Model Content

[0003] Therefore, it is necessary to propose a double rubber hydraulic bushing to address the shortcomings of traditional hydraulic bushings being unsuitable for use in new energy vehicles.

[0004] This application relates to a dual rubber hydraulic bushing, comprising:

[0005] Inner tube of medium;

[0006] A collision-resistant block is fitted onto the outer circumferential surface of the inner medium tube, with the inner circumferential surface of the collision-resistant block being attached to the outer circumferential surface of the inner medium tube.

[0007] An inner clamping shell is fitted onto the outer circumferential surface of the anti-collision block;

[0008] The main spring rubber part is sleeved on the outer peripheral surface of the inner clamping shell;

[0009] The intermediate frame part is fitted onto the outer peripheral surface of the main spring rubber part;

[0010] The flow channel plate includes a first sub-plate and a second sub-plate, which are attached to each other. The first sub-plate is arranged around the outer peripheral surface of the inner clamping shell, and the second sub-plate is arranged around the outer peripheral surface of the main spring rubber part. The first sub-plate abuts against the bottom and top of the intermediate frame part, and the second sub-plate abuts against the bottom and top of the intermediate frame part.

[0011] The outer shell covers the outer periphery of the intermediate skeleton.

[0012] This application relates to a dual-rubber hydraulic bushing, based on a medium inner tube and a main spring rubber section, with one liquid chamber and another liquid chamber arranged in a 180-degree direction along the central axis of the medium inner tube. The space within the main spring rubber section is one liquid chamber. The space within the flow channel plate is the other liquid chamber. The two liquid chambers are connected by an inertial channel, and both are filled with damping fluid. When one side of the dual-rubber hydraulic bushing is subjected to an external load, the liquid chamber is compressed, and the fluid flows through the inertial channel to the other liquid chamber. During the fluid flow, the fluid overcomes the surface friction of the inertial channel, thereby converting the energy of external vibrations into heat energy and releasing it into the atmosphere, thus achieving the purpose of vibration reduction and noise reduction. The dual-rubber hydraulic bushing simultaneously addresses and solves the problems of vibration reduction and noise reduction performance as well as durability. The dual-rubber hydraulic bushing can meet the durability requirements of hydraulic bushings while ensuring their vibration reduction and noise reduction performance, thereby improving the overall NVH performance of new energy vehicles. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a double rubber hydraulic bushing provided in an embodiment of this application.

[0014] Figure 2 This is a schematic diagram of the inner medium tube with a double rubber hydraulic bushing, provided as another embodiment of this application.

[0015] Figure 3 This is a schematic diagram of the structure of an anti-collision block with double rubber hydraulic bushings provided in an embodiment of this application.

[0016] Figure 4 This is a schematic diagram of the inner clamping shell of a double rubber hydraulic bushing, provided for another embodiment of this application.

[0017] Figure 5 This is a schematic diagram of the structure of a spring main support and a buffer pad of a double rubber hydraulic bushing provided in an embodiment of this application.

[0018] Figure 6 This is a schematic diagram of the main spring rubber section of a double rubber hydraulic bushing, provided as another embodiment of this application.

[0019] Figure 7 This is a schematic diagram of the structure of the intermediate skeleton of a double rubber hydraulic bushing according to an embodiment of this application.

[0020] Figure 8 This is a schematic diagram of the flow channel plate of a double rubber hydraulic bushing provided in another embodiment of this application.

[0021] Figure 9 This is a schematic diagram of the main spring rubber part and flow channel plate of a double rubber hydraulic bushing provided in another embodiment of this application.

[0022] Figure label:

[0023] 100 - Inner medium tube; 110 - Keyway; 200 - Anti-collision block; 210 - Annular tube; 220 - Limiting block;

[0024] 230 - Flow channel block; 231 - Flow channel; 300 - Inner clamping shell; 400 - Main spring rubber part;

[0025] 410 - Spring main support; 411 - Flow guide hole; 420 - Flow channel sidewall; 500 - Intermediate skeleton part;

[0026] 510 - Top ring; 520 - Bottom ring; 530 - Connecting ring; 540 - First accommodating space;

[0027] 550 - Second accommodating space; 600 - Flow channel plate; 610 - First dividing plate; 611 - First flow channel;

[0028] 620 - Second partition board; 700 - Outer shell; 800 - Buffer pad. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0030] This application provides a dual rubber hydraulic bushing.

[0031] like Figure 1 As shown in one embodiment of this application, a double rubber hydraulic bushing includes a medium inner tube 100, a collision block 200, an inner clamping shell 300, a main spring rubber part 400, an intermediate skeleton part 500, a flow channel 231 plate, and an outer shell 700.

[0032] The anti-collision block 200 is fitted onto the outer circumferential surface of the inner medium tube 100, and the inner circumferential surface of the anti-collision block 200 is attached to the outer circumferential surface of the inner medium tube 100.

[0033] like Figure 1 and Figure 4 As shown, the inner clamping shell 300 is sleeved on the outer peripheral surface of the anti-collision block 200.

[0034] The main spring rubber part 400 is sleeved on the outer peripheral surface of the inner clamping housing 300.

[0035] The intermediate skeleton part 500 is fitted onto the outer peripheral surface of the main spring rubber part 400.

[0036] like Figure 8As shown, the flow channel plate 600 includes a first sub-plate 610 and a second sub-plate 620. The first sub-plate 610 and the second sub-plate 620 are attached to each other. The first sub-plate 610 is disposed around the outer peripheral surface of the inner clamping housing 300, and the second sub-plate 620 is disposed around the outer peripheral surface of the main spring rubber part 400. The first sub-plate 610 abuts between the bottom and the top of the intermediate frame part 500, and the second sub-plate 620 abuts between the bottom and the top of the intermediate frame part 500.

[0037] like Figure 1 As shown, the outer shell 700 covers the outer peripheral surface of the intermediate skeleton part 500.

[0038] This embodiment relates to a dual-rubber hydraulic bushing, based on a medium inner tube 100 and a main spring rubber section 400, with one liquid chamber and another liquid chamber arranged at 180 degrees along the central axis of the medium inner tube 100. The space within the main spring rubber section 400 is one liquid chamber. The space within the flow channel 231 plate is the other liquid chamber. The two liquid chambers are connected by an inertial channel, and both are filled with damping fluid. When one side of the dual-rubber hydraulic bushing is subjected to an external load, one liquid chamber is compressed, and the fluid flows through the inertial channel to the other liquid chamber. During the fluid flow, the fluid overcomes the surface friction of the inertial channel, thereby converting the energy of external vibrations into heat energy and releasing it into the atmosphere, thus achieving the purpose of vibration reduction and noise reduction. The dual-rubber hydraulic bushing simultaneously addresses and solves the problems of vibration reduction and noise reduction performance as well as durability. Dual rubber hydraulic bushings can meet the durability requirements of hydraulic bushings while ensuring their vibration damping and noise reduction performance, thus improving the overall NVH performance (NVH, Noise, Vibration, Harshness) of new energy vehicles.

[0039] like Figure 2 As shown, in one embodiment of this application, the inner medium tube 100 is provided with a keyway 110. The keyway 110 is disposed in the inner cavity of the inner medium tube 100.

[0040] Specifically, the keyway 110 provided in the inner medium tube 100 can be a straight keyway 110. The keyway 110 is used to provide space for holding the vehicle suspension and to prevent relative rotation between the inner medium tube 100 and the vehicle suspension.

[0041] The inner cavity of the medium inner tube 100 may be provided with two keyways 110, and the two keyways 110 provided in the medium inner tube 100 are centrally symmetrical with respect to the central axis of the medium inner tube 100.

[0042] like Figure 3As shown, in one embodiment of this application, the anti-collision block 200 includes an annular tube 210, a limiting block 220, and a flow channel block 230. The limiting block 220 is disposed on the outer peripheral surface of the annular tube 210. The flow channel block 230 is disposed on the outer peripheral surface of the annular tube 210. The annular tube 210 is sleeved on the outer peripheral surface of the inner medium tube 100. The inner peripheral surface of the annular tube 210 is attached to the outer peripheral surface of the inner medium tube 100.

[0043] Specifically, the annular tube 210 is sleeved on the outer circumferential surface of the inner medium tube 100, and the annular tube 210 can rotate relative to the inner medium tube 100.

[0044] The anti-collision block 200 has a collapsible feature. This collapsible feature means that the anti-collision block 200 uses a material with lower strength compared to other structures in the dual rubber hydraulic bushing. This allows the anti-collision block 200 to undergo localized compression and deformation when subjected to external forces. This enables high-damping fluid flow within the dual rubber hydraulic bushing, which, through high-damping fluid friction and heat generation, suppresses and attenuates residual vibrations of the vehicle body, thereby improving the overall NVH characteristics of the vehicle.

[0045] Due to the increased weight of new energy vehicles, the weight of the battery in a new energy vehicle exceeds that of the engine in a traditional fuel vehicle, resulting in an increase in the overall vehicle weight and a change in the vehicle's center of gravity.

[0046] Regenerative braking in new energy vehicles leads to increased braking load and torque. Combined with the vehicle manufacturer's design, which results in larger vehicle size and the use of larger tires, the combined effect of these factors causes the suspension damping components of new energy vehicles to bear a much higher load than those of traditional gasoline vehicles.

[0047] When the center of gravity of the vehicle changes and the load on the suspension dampers changes, the collapsible feature of the anti-collision block 200 can adapt to the problem of increased weight of new energy vehicles.

[0048] Meanwhile, to address the increased impact on the vehicle caused by its increased weight when traversing rough roads and speed bumps, most new energy vehicle manufacturers utilize electronically controlled shock absorbers and air springs to reduce transient shocks. However, air springs, due to their low lateral stiffness, result in large residual vibrations from impacts that do not converge quickly. Therefore, the flow channel block 230 of the impact block can be used to implement high-damping hydraulic bushings to suppress and attenuate residual vibrations, thereby improving the overall NVH characteristics of the vehicle.

[0049] The annular tube 210 of the anti-collision block 200 facilitates the movement of other components of the double rubber hydraulic bushing relative to the media inner tube 100 of the double rubber hydraulic bushing.

[0050] The limiting block 220 of the anti-collision block 200 helps to maintain the stability of the main spring rubber part 400 and prevents the high-damping liquid of the main spring rubber part 400 from overflowing.

[0051] like Figure 3 As shown, in one embodiment of this application, the outer peripheral surface of the limiting block 220 is smoothly connected to the outer peripheral surface of the annular tube 210. The outer peripheral surface of the flow channel block 230 is provided with a plurality of flow channels 231. Each of the flow channels 231 is parallel to each other.

[0052] Specifically, the multiple flow channels 231 provided on the outer peripheral surface of the flow channel block 230 can connect the high-damping liquid in the liquid cavity through the inertial channel. The liquid cavity is filled with damping liquid ethylene glycol. When one side of the bushing is subjected to an external load, the liquid cavity is squeezed and the liquid flows to another liquid cavity through the inertial channel. During the liquid flow, the liquid overcomes the surface friction of the inertial channel, thereby converting the energy of external vibration into heat energy and releasing it into the atmosphere, thus achieving the purpose of vibration reduction and noise reduction.

[0053] like Figure 7 As shown, in one embodiment of this application, the intermediate frame portion 500 includes a top ring 510 and a bottom ring 520. The central axis of the top ring 510 coincides with the central axis of the bottom ring 520. At least one connecting ring piece 530 is provided between the top ring 510 and the bottom ring 520. The top of the connecting ring piece 530 is connected to the top ring 510. The bottom of the connecting ring piece 530 is connected to the bottom ring 520.

[0054] Specifically, the top ring 510 and bottom ring 520 of the intermediate skeleton part 500 can solve the vibration reduction, noise reduction and durability performance of the hydraulic bushing.

[0055] The increased weight of new energy vehicles leads to significantly higher stress on the dual rubber hydraulic bushings, typically more than 1.5 times that of traditional fuel vehicles. Due to space constraints, the size of the hydraulic bushings cannot be increased, making the rubber on the limiting block 220 of the hydraulic bushings prone to damage under the dynamic load of the vehicle. At least one connecting ring 530 between the top ring 510 and the bottom ring 520 prevents excessive dynamic deformation of components with crumple zones, such as the anti-collision block 200, thereby reducing technical issues such as contact noise, dynamic interference noise, and insufficient product durability.

[0056] like Figure 7As shown, in one embodiment of this application, both connecting ring pieces 530 are disposed between the top band ring 510 and the bottom band ring 520. A first accommodating space 540 and a second accommodating space 550 are provided between one connecting ring piece 530 and the other connecting ring piece 530. The first accommodating space 540 is on the same side of the two connecting ring pieces 530. The second accommodating space 550 is on the other side of the two connecting ring pieces 530.

[0057] Specifically, based on the inner medium tube 100 and the main spring rubber part 400, a liquid cavity and another liquid cavity are provided in the direction of 180 degrees along the central axis of the inner medium tube 100. The space in the main spring rubber part 400 is one liquid cavity. The space in the flow channel 231 plate is another liquid cavity. The two liquid cavities are connected by channels provided by the first accommodating space 540 and the second accommodating space 550, and the liquid cavities are filled with damping fluid. When one side of the double rubber hydraulic bushing is subjected to an external load, the liquid cavity is compressed, and the liquid flows to the other liquid cavity through the inertial channel. During the liquid flow, the liquid overcomes the surface friction of the inertial channel, thereby converting the energy of external vibration into heat energy and releasing it into the atmosphere, thus achieving the purpose of vibration reduction and noise reduction.

[0058] like Figure 6 and Figure 9 As shown, in one embodiment of this application, the main spring rubber part 400 includes a main spring support 410. The main spring support 410 is provided with a guide hole 411. The main spring support 410 is sleeved on the outer peripheral surface of the inner clamping housing 300. The flow channel block 230 is disposed in the guide hole 411. The flow channel block 230 passes through the guide hole 411.

[0059] Specifically, the main spring rubber part 400 can use the main spring support 410 as the main load-bearing body, and the guide hole 411 provided in the main spring support 410 can serve as an inertial channel between the two liquid chambers.

[0060] like Figure 3 and Figure 6 As shown, in one embodiment of this application, the main spring rubber portion 400 further includes a flow channel 231 sidewall. The top end of the flow channel 231 sidewall abuts against the top of the main spring support 410. The bottom end of the flow channel 231 sidewall abuts against the bottom of the main spring support 410. The flow channel 231 sidewall is attached to the inner clamping housing 300.

[0061] Specifically, the top of the sidewall of flow channel 231 abuts against the top of the main spring support 410, and the bottom of the sidewall of flow channel 231 abuts against the bottom of the main spring support 410. The side of the sidewall of flow channel 231 increases the complexity of the inertial channel of the guide hole 411 between the two liquid chambers. Based on the complexity of the inertial channel, the liquid overcomes the surface friction of the inertial channel, thereby converting the energy of external vibration into heat energy and releasing it into the atmosphere, thus achieving the purpose of vibration reduction and noise reduction.

[0062] In fact, a gap is provided between the side wall of the flow channel 231 and the inner clamping shell 300 so that when the liquid passes through the inertial channel, it overcomes the surface friction of the inertial channel, thereby converting the energy of external vibration into heat energy and releasing it into the atmosphere, thus achieving the purpose of vibration reduction and noise reduction.

[0063] like Figure 8 As shown, in one embodiment of this application, the first partition plate 610 is provided with a first flow channel 611. The first flow channel 611 is interconnected with the first accommodating space 540.

[0064] The dual rubber hydraulic bushing is also provided with a buffer pad 800. The buffer pad 800 is attached to the top of the outer casing 700.

[0065] Specifically, the first flow channel 611 set in the first partition plate 610 allows the liquid chamber to be squeezed when one side of the double rubber hydraulic bushing is subjected to an external load. The liquid flows to another liquid chamber through the inertial channel. During the flow of the liquid in the first flow channel 611, the liquid overcomes the surface friction of the first flow channel 611, thereby converting the energy of the external vibration into heat energy and releasing it into the atmosphere.

[0066] The 800 buffer pad is used to attenuate and cushion the impact of a vehicle passing over rough surfaces. It also prevents cracks from deepening once the rubber has cracked along its axial direction.

[0067] The technical features of the above embodiments can be combined arbitrarily, and the execution order of the method steps is not restricted. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A dual rubber hydraulic bushing characterized by, include: Inner tube of medium; A collision-resistant block is fitted onto the outer circumferential surface of the inner medium tube, with the inner circumferential surface of the collision-resistant block being attached to the outer circumferential surface of the inner medium tube. An inner clamping shell is fitted onto the outer circumferential surface of the anti-collision block; The main spring rubber part is sleeved on the outer peripheral surface of the inner clamping shell; The intermediate frame part is fitted onto the outer peripheral surface of the main spring rubber part; The flow channel plate includes a first sub-plate and a second sub-plate, which are attached to each other. The first sub-plate is arranged around the outer peripheral surface of the inner clamping shell, and the second sub-plate is arranged around the outer peripheral surface of the main spring rubber part. The first sub-plate abuts against the bottom and top of the intermediate frame part, and the second sub-plate abuts against the bottom and top of the intermediate frame part. The outer shell covers the outer periphery of the intermediate skeleton.

2. The dual rubber hydraulic bushing of claim 1, wherein, The inner tube of the medium is provided with a keyway; The keyway is located in the inner cavity of the medium tube.

3. The dual rubber hydraulic bushing of claim 2, wherein, The anti-collision block includes an annular tube, a limiting block, and a flow channel block; The limiting block is disposed on the outer circumferential surface of the annular tube; The flow channel block is disposed on the outer circumferential surface of the annular tube; The annular tube is sleeved on the outer circumferential surface of the inner tube of the medium; The inner circumferential surface of the annular tube is attached to the outer circumferential surface of the inner medium tube.

4. The dual rubber hydraulic bushing of claim 3, wherein, The outer peripheral surface of the limiting block is smoothly connected to the outer peripheral surface of the annular tube. The outer circumferential surface of the flow channel block is provided with multiple flow channels; Each of the aforementioned flow channels is parallel to the others.

5. The dual rubber hydraulic bushing of claim 4, wherein, The intermediate frame includes a top ring and a bottom ring; The central axis of the top ring coincides with the central axis of the bottom ring. At least one connecting ring is provided between the top belt ring and the bottom belt ring; The top of the connecting ring piece is connected to the top belt ring; The bottom of the connecting ring is connected to the bottom band ring.

6. The dual rubber hydraulic bushing of claim 5, wherein, Both connecting ring pieces are disposed between the top belt ring and the bottom belt ring; A first accommodating space and a second accommodating space are provided between one of the connecting ring pieces and the other connecting ring piece; The first accommodating space is on the same side of both connecting ring pieces; The second accommodating space is on the other side of the two connecting ring pieces.

7. The dual rubber hydraulic bushing of claim 6, wherein, The main spring rubber section includes the main spring support body; The main support of the spring is provided with a flow guide hole; The main spring support is sleeved on the outer circumferential surface of the inner clamping shell; The flow channel block is disposed in the flow guide hole; The flow channel block penetrates the flow guide hole.

8. The dual rubber hydraulic bushing of claim 7, wherein, The main spring rubber section also includes a flow channel sidewall; The top of the flow channel sidewall abuts against the top of the spring main support; The bottom end of the flow channel sidewall abuts against the bottom of the spring main support; The flow channel sidewall is attached to the inner clamping shell.

9. The dual rubber hydraulic bushing of claim 8, wherein, The first partition is provided with a first flow channel; The first flow channel is interconnected with the first accommodating space.

10. The dual rubber hydraulic bushing of claim 9, wherein, The double rubber hydraulic bushing is also provided with a buffer pad; The cushioning pad is attached to the top of the outer casing.

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