Rubber silicone oil suspension device for commercial vehicle cab

Abstract

The utility model relates to a suspension device technical field, specifically disclose a rubber silicon oil suspension device for commercial vehicle cab, including lower casing, the bottom end of lower casing is closed and is equipped with silicon oil accommodation cavity, silicon oil is filled in silicon oil accommodation cavity, the top opening of lower casing, the top opening of lower casing is equipped with lower flanging, install rubber main spring in lower casing, and rubber main spring includes upper casing and rubber block of integral vulcanization on upper casing, the top of upper casing is equipped with the upper flanging of cooperation with lower flanging, and the upper flanging is fixed together with lower flanging, the top of rubber main spring is fixedly installed in cab bottom, the bottom of rubber main spring is fixedly installed with metal gasket, under the unstressed state, silicon oil is located below metal gasket, the utility model installs between cab and frame, has outstanding damping and stability, excellent wide temperature range stability, high bearing and long life, intelligent frequency adaptability, promotes comprehensive comfort.

Description

Technical Field

[0001] This utility model relates to the field of suspension device technology, and in particular to a rubber silicone oil suspension device for the cab of a commercial vehicle. Background Technology

[0002] In commercial vehicles, the cab is mounted on the frame via several suspension points. The core function of these suspensions is to mitigate excitation from uneven road surfaces and the engine, thereby improving driver comfort. Early suspension bushings were commonly made of pure rubber, which were simple in structure and low in cost, but had low damping and were poor at suppressing low-frequency, high-amplitude vibrations (such as those from bumps, craters, and brake dive). This easily led to continuous shaking of the cab, failing to effectively dissipate vibration energy. Consequently, the cab would experience residual vibration and low-frequency shaking after being subjected to impacts, severely affecting driving comfort.

[0003] To improve performance, hydraulic suspension technology emerged. Traditional hydraulic suspension devices contain a fluid chamber, an inertial channel, and a decoupling membrane, utilizing the damping effect of the fluid flowing in the inertial channel to dissipate vibration energy. However, these suspensions often use traditional fluids such as ethylene glycol, which have poor viscosity-temperature stability, resulting in significant performance fluctuations in extremely cold or hot environments. The performance of traditional hydraulic suspensions is unstable, and the viscosity of the hydraulic oil used is significantly affected by temperature. At low temperatures, excessively high viscosity leads to excessive suspension stiffness and poor vibration isolation; at high temperatures, excessively low viscosity weakens the damping effect, affecting the control of large-amplitude vibrations. The cab suspension needs to withstand the weight of the cab itself (large static load) and complex dynamic forces. The decoupling membrane inside a traditional hydraulic suspension is prone to fatigue damage under long-term heavy loads, and the rubber main spring is prone to creep under long-term heavy pressure, resulting in cab sagging. It has poor durability and reliability, and it is difficult to achieve a good balance between effectively filtering high-frequency fine vibrations from the road surface (requiring low stiffness and low damping) and suppressing low-frequency large-amplitude swaying of the cab (such as cornering roll and braking pitch, requiring high damping). Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a rubber silicone oil suspension device for commercial vehicle cabs that overcomes the defects of existing cab suspensions, provides excellent damping characteristics, rapidly attenuates low-frequency cab sway, improves dynamic stability, ensures that the dynamic performance of the suspension remains stable over a wide temperature range, improves the load-bearing capacity and service life of the suspension, prevents cab sinking and early failure of decoupling components, synergistically optimizes high-frequency vibration isolation and low-frequency vibration suppression performance, and improves overall comfort.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a rubber silicone oil suspension device for a commercial vehicle cab, comprising a lower housing, a silicone oil receiving cavity enclosed at the bottom of the lower housing, the silicone oil receiving cavity being filled with silicone oil, an opening at the top of the lower housing, a downward flange at the top opening of the lower housing, a rubber main spring installed inside the lower housing, the rubber main spring comprising an upper housing and a rubber block integrally vulcanized on the upper housing, an upper flange at the top of the upper housing cooperating with the downward flange, the upper flange and the downward flange being pressed and fixed together, the top of the rubber main spring being fixedly installed at the bottom of the cab, and a metal gasket being fixedly installed at the bottom of the rubber main spring, wherein the silicone oil is located below the metal gasket in the unloaded state.

[0006] As a preferred technical solution, a metal inner core is integrally vulcanized at the center of the rubber block, and an upper threaded hole is opened at the top of the metal inner core. A double-ended bolt is installed in the upper threaded hole, and the top of the double-ended bolt is used to connect with the cab.

[0007] As a preferred technical solution, the rubber block is arranged around the metal inner core, and the two are integrally vulcanized. The lower end of the upper shell is vulcanized and embedded in the rubber block, and the upper end of the upper shell extends out of the rubber block and is provided with the upper flange. The metal inner core is thicker at the top and thinner at the bottom.

[0008] As a preferred technical solution, the bottom of the metal inner core is provided with a threaded hole, and a standard bolt is installed in the threaded hole. The standard bolt passes through the center hole of the metal washer and is threaded into the threaded hole.

[0009] As a preferred technical solution, the lower housing is a cylindrical housing, the metal gasket is a circular gasket, the outer diameter of the circular gasket is smaller than the inner diameter of the lower housing, and an inertial channel for the silicone oil to flow up and down is formed between the metal gasket and the inner wall of the lower housing.

[0010] As a preferred technical solution, the bottom center of the rubber block is recessed upwards, forming a buffer cavity with the metal gasket. The top of the rubber block protrudes from the upper surface of the lower housing. The middle part of the rubber block located below the upper housing is in close contact with the inner wall of the lower housing. An oil passage gap is left between the outer periphery of the bottom of the rubber block and the inner wall of the lower housing.

[0011] As a preferred technical solution, a sealing ring is provided on the outer periphery of the middle part of the rubber block, and the sealing ring is interference-fitted with the inner wall of the lower housing.

[0012] Due to the adoption of the above technical solution, the rubber silicone oil suspension device for commercial vehicle cab includes a lower housing, a silicone oil receiving cavity sealed at the bottom of the lower housing, the silicone oil receiving cavity being filled with silicone oil, an opening at the top of the lower housing, a downward flange at the top opening of the lower housing, a rubber main spring installed inside the lower housing, the rubber main spring including an upper housing and a rubber block integrally vulcanized on the upper housing, an upper flange at the top of the upper housing that cooperates with the downward flange, the upper flange and the downward flange being pressed and fixed together, the top of the rubber main spring being fixedly installed at the bottom of the cab, and a metal gasket being fixedly installed at the bottom of the rubber main spring. In the unloaded state, the silicone oil is located below the metal gasket. The beneficial effect of this utility model is that four of these devices are installed between the cab and the frame, the top of which is threaded to the cab by double-headed bolts, and the four limiting holes at the contact points of the upper and lower brackets are bolted to the frame. Each wheel corresponds to a silicone oil suspension device. This device reciprocates around its equilibrium position, and regardless of the frequency, its vibration is determined by external excitation. Within a certain frequency range, the higher the excitation frequency, the higher the vibration frequency of the silicone oil suspension. The lower housing, as the outer part, supports the suspension and houses the rubber spring and silicone oil. The lower housing and upper housing are tightly connected and fixed together through a flanged and press-fitting process. The two sealing protrusions of the rubber block form a sealing ring, which has an interference fit with the lower housing, increasing the friction between the rubber block and the lower housing, making the connection more stable. The resulting seal effectively prevents silicone oil leakage. Silicone oil is injected before the rubber spring is pressed into the housing. After injection, the rubber spring is pressed into the lower housing and flanged. This invention has the following beneficial effects: (1) Excellent damping and stability: The use of inertial channels combined with high viscosity silicone oil provides extremely high damping force for large amplitude vibrations, which can quickly attenuate low frequency shaking and impact of the cab, fundamentally improve vehicle dynamic stability and ride comfort, and enhance dynamic stability. (2) Excellent wide temperature range stability: Silicone oil has an extremely high viscosity index, and its viscosity changes very little with temperature. This ensures that the dynamic performance of the suspension remains stable over a wide temperature range (-40℃ to 80℃). Therefore, the damping and stiffness performance of this invention remains stable in both cold and hot environments, overcoming the performance shortcomings of traditional hydraulic suspensions; (3) High load-bearing capacity and long service life: The upper shell adopts a metal frame and a vulcanized structure with rubber main spring, which provides extremely high load-bearing capacity and creep resistance, effectively preventing cab sinking and early failure of decoupling components; (4) As a metal structural component, the inertial channel is more robust and durable than the traditional independent plastic channel. It mainly works under small amplitude, avoiding severe impact and having a longer lifespan. (5) Intelligent frequency adaptability: Through the coordinated design of inertial channel (high damping) + rubber main spring (low stiffness), the ideal dynamic characteristics of "soft at high frequency and hard at low frequency" are realized, which perfectly takes into account the dual needs of high frequency vibration isolation and low frequency vibration suppression, and improves the overall comfort. Attached Figure Description

[0013] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein: Figure 1 This is a perspective view of the rubber silicone oil suspension device for the cab of a commercial vehicle according to this utility model; Figure 2 This is a front view of the rubber silicone oil suspension device for the cab of a commercial vehicle according to this utility model; Figure 3 This is a cross-sectional view of the rubber silicone oil suspension device for the cab of a commercial vehicle according to this utility model; Figure 4 This is a top view of the rubber silicone oil suspension device for the cab of a commercial vehicle according to this utility model.

[0014] In the diagram: 1-Lower housing; 2-Silicone oil accommodating cavity; 3-Silicone oil; 4-Lower flange; 5-Rubber block; 6-Upper housing; 7-Upper flange; 8-Metal gasket; 9-Metal inner core; 10-Double-ended bolt; 11-Standard bolt; 12-Sealing ring; 13-Inertial channel; 14-Buffer cavity; 15-Oil passage gap. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Undoubtedly, those skilled in the art will recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

[0016] like Figures 1 to 4As shown, a rubber silicone oil suspension device for a commercial vehicle cab includes a lower housing 1. The bottom of the lower housing 1 is closed with a silicone oil receiving cavity 2, which is filled with silicone oil 3. The top of the lower housing 1 has an opening, and a downward-curved flange 4 is provided at the top opening. A rubber main spring is installed inside the lower housing 1. The rubber main spring includes an upper housing 6 and a rubber block 5 integrally vulcanized on the upper housing 6. The top of the upper housing 6 has an upper flange 7 that cooperates with the downward-curved flange 4. The upper flange 7 and the downward-curved flange 4 are pressed and fixed together. The top of the rubber main spring is fixedly installed at the bottom of the cab, and the bottom of the rubber main spring is fixedly installed at the bottom. A metal gasket 8 is fixedly installed. In the unloaded state, the silicone oil 3 is located below the metal gasket 8. Four of these devices are installed between the cab and the frame. The top is threaded to the cab via double-ended bolts, and the upper and lower brackets are bolted to the frame via four limiting holes at their contact points. Each wheel corresponds to one silicone oil 3 suspension device. The silicone oil 3 suspension device always reciprocates near its equilibrium position. Regardless of the frequency, the vibration of the silicone oil 3 suspension device is determined by external excitation. Within a certain frequency range, the higher the excitation vibration frequency, the higher the vibration frequency of the silicone oil 3 suspension. The lower housing 1, as the outer part, serves to support the suspension and house the rubber main spring and silicone oil 3. The lower housing 1 and the upper housing 6 are tightly connected and fixed together through a flange and pressing process. The two sealing protrusions of the rubber block 5 form a sealing ring 12, which has an interference fit with the lower housing 1, increasing the friction between the rubber block 5 and the lower housing 1, making the connection more stable. At the same time, the sealing effect effectively prevents the silicone oil 3 from overflowing. Silicone oil 3 is injected before the rubber main spring is press-fitted. After injection, the rubber main spring is pressed into the lower housing 1 and the edges are turned up. This utility model has the following beneficial effects: (1) Excellent damping and stability: The inertial channel 13 combined with high viscosity silicone oil 3 provides extremely high damping force for large amplitude vibration, which can quickly attenuate the low frequency shaking and impact of the cab, fundamentally improve the vehicle's dynamic stability and ride comfort, and enhance dynamic stability. (2) Excellent wide temperature range stability: Silicone oil 3 has an extremely high viscosity index, and its viscosity changes very little with temperature. This ensures that the dynamic performance of the suspension remains stable over a wide temperature range (-40℃ to 80℃). Therefore, the damping and stiffness performance of this invention remains stable in both cold and hot environments, overcoming the performance shortcomings of traditional hydraulic suspensions; (3) High load-bearing capacity and long service life: The upper shell 6 adopts a metal frame and a vulcanized structure with rubber main spring, which provides extremely high load-bearing capacity and creep resistance, effectively preventing cab sinking and early failure of decoupling components; (4) As a metal structural component, the inertial channel 13 is more robust and durable than the traditional independent plastic channel. It mainly works under small amplitude, avoiding severe impact and having a longer lifespan. (5) Intelligent frequency adaptability: Through the coordinated design of inertial channel 13 (high damping) + rubber main spring (low stiffness), the ideal dynamic characteristics of "soft at high frequency and hard at low frequency" are realized, which perfectly takes into account the dual needs of high frequency vibration isolation and low frequency vibration suppression, and improves the overall comfort.

[0017] like Figure 3 As shown, a metal inner core 9 is integrally vulcanized at the center of the rubber block 5. The top of the metal inner core 9 has an upper threaded hole, and a double-ended bolt 10 is installed within the threaded hole. The top of the double-ended bolt 10 is used for connection to the cab. The metal inner core 9 not only enhances the strength of the rubber main spring but also strengthens the connection with the double-ended bolt 10. The bottom of the double-ended bolt 10 is fixedly connected to the metal inner core 9, and the top of the double-ended bolt 10 is fixedly connected to the bottom of the cab.

[0018] like Figure 3 As shown, a rubber block 5 surrounds a metal inner core 9, and the two are integrally vulcanized. The lower end of the upper shell 6 is vulcanized and embedded within the rubber block 5. The upper end of the upper shell 6 extends outward from the rubber block 5 and has an upward-curved edge 7. The metal inner core 9 is thicker at the top and thinner at the bottom. The upper shell 6 serves to support the entire rubber block 5 from the outside. The upward-curved edge 7 is used to press with the downward-curved edge 4, making the rubber main spring an integral unit. The thicker top and thinner bottom of the metal inner core 9 not only provides space for the installation of the double-ended bolt 10 but also enhances the strength of the rubber main spring.

[0019] like Figure 3 As shown, the bottom of the metal inner core 9 has a threaded hole, and a standard bolt 11 is threaded into the threaded hole. The standard bolt 11 passes through the center hole of the metal washer 8 and is threaded into the threaded hole. The standard bolt 11 mainly serves to fix the metal washer 8. The center hole of the metal washer 8 is consistent with the outer diameter of the standard bolt 11. The metal washer 8 is used to compress the silicone oil 3 when encountering bumps, forcing the silicone oil 3 into the inertia channel 13 and the oil passage gap 15, thereby achieving shock absorption and cushioning of the vehicle.

[0020] like Figure 1 and Figure 3 As shown, the lower housing 1 is a cylindrical housing, and the metal gasket 8 is a circular gasket with an outer diameter smaller than the inner diameter of the lower housing 1. An inertial channel 13 is formed between the metal gasket 8 and the inner wall of the lower housing 1 for the vertical flow of silicone oil 3. The function of the inertial channel 13 is to allow the silicone oil 3 to pass through. When the vehicle encounters severe vibration, the rubber block 5 deforms and moves downward, causing the metal gasket 8 to press against the silicone oil 3, so that the silicone oil 3 flows into the inertial channel 13 and the oil passage gap 15, thus playing a buffering role.

[0021] like Figure 3As shown, the bottom center of the rubber block 5 is concave upwards, forming a buffer cavity 14 between it and the metal gasket 8. The top of the rubber block 5 protrudes from the upper surface of the lower housing 1. The middle part of the rubber block 5, located below the upper housing 6, fits tightly against the inner wall of the lower housing 1. An oil passage gap 15 is left between the outer periphery of the bottom of the rubber block 5 and the inner wall of the lower housing 1. When the vehicle encounters a slight bump, the rubber block 5 deforms and presses against the buffer cavity 14. The existence of the buffer cavity 14 provides space for the deformation of the rubber block 5 and absorbs the energy of the slight bump.

[0022] like Figure 3 As shown, a sealing ring 12 protrudes outward from the outer periphery of the middle part of the rubber block 5, and the sealing ring 12 is interference-fitted with the inner wall of the lower housing 1. Preferably, two sealing rings 12 are provided, which are interference-fitted with the lower housing 1 to increase the friction between the rubber block 5 and the lower housing 1, making the joint more stable. At the same time, the sealing effect formed can effectively prevent the silicone oil 3 from overflowing.

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A rubber silicone oil suspension device for a commercial vehicle cab, characterized in that: The device includes a lower housing (1), the bottom of which is closed with a silicone oil accommodating cavity (2), which is filled with silicone oil (3). The top of the lower housing (1) is open, and a lower flange (4) is provided at the top opening. A rubber main spring is installed inside the lower housing (1). The rubber main spring includes an upper housing (6) and a rubber block (5) integrally vulcanized on the upper housing (6). The top of the upper housing (6) is provided with an upper flange (7) that cooperates with the lower flange (4). The upper flange (7) and the lower flange (4) are pressed and fixed together. The top of the rubber main spring is fixedly installed at the bottom of the cab. A metal gasket (8) is fixedly installed at the bottom of the rubber main spring. In the unloaded state, the silicone oil (3) is located below the metal gasket (8).

2. The rubber silicone oil suspension device for a commercial vehicle cab as described in claim 1, characterized in that: The rubber block (5) has an integrally vulcanized metal core (9) at its center. The top of the metal core (9) has an upper threaded hole, and a double-ended bolt (10) is installed in the upper threaded hole. The top of the double-ended bolt (10) is used to connect to the cab.

3. The rubber silicone oil suspension device for a commercial vehicle cab as described in claim 2, characterized in that: The rubber block (5) is arranged around the metal inner core (9), and the two are integrally vulcanized. The lower end of the upper shell (6) is vulcanized and embedded in the rubber block (5). The upper end of the upper shell (6) extends out of the rubber block (5) and is provided with the upper flange (7). The metal inner core (9) is thicker at the top and thinner at the bottom.

4. The rubber silicone oil suspension device for a commercial vehicle cab as described in claim 2, characterized in that: The bottom of the metal core (9) is provided with a threaded hole, and a standard bolt (11) is installed in the threaded hole. The standard bolt (11) passes through the center hole of the metal washer (8) and is threaded in the threaded hole.

5. The rubber silicone oil suspension device for a commercial vehicle cab as described in claim 4, characterized in that: The lower housing (1) is a cylindrical housing, and the metal gasket (8) is a circular gasket. The outer diameter of the circular gasket is smaller than the inner diameter of the lower housing (1). An inertial channel (13) for the vertical flow of the silicone oil (3) is formed between the metal gasket (8) and the inner wall of the lower housing (1).

6. The rubber silicone oil suspension device for a commercial vehicle cab as described in any one of claims 1 to 5, characterized in that: The bottom center of the rubber block (5) is concave upwards, forming a buffer cavity (14) with the metal gasket (8). The top of the rubber block (5) protrudes from the upper surface of the lower housing (1). The middle part of the rubber block (5) located below the upper housing (6) is in close contact with the inner wall of the lower housing (1). An oil passage gap (15) is left between the bottom outer periphery of the rubber block (5) and the inner wall of the lower housing (1).

7. The rubber silicone oil suspension device for a commercial vehicle cab as described in claim 6, characterized in that: The rubber block (5) has a sealing ring (12) protruding outward from the middle outer periphery, and the sealing ring (12) is interference-fitted with the inner wall of the lower shell (1).

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