A hydraulic bushing structure for flow self-adjustment under multiple working conditions

Abstract

A kind of hydraulic bushing structure for flow self-regulation under multiple working conditions, including inner tube (1), rubber covering layer (2), outer sleeve layer (3), flow channel (4), flow pressure sensor (5) and dial piece type switch (6).The inner tube and outer sleeve layer are on the two sides of rubber covering layer;Rubber covering layer includes: four-way flow channel, intermediate flow channel, flow channel switch and flow pressure sensor.The present application senses the pressure difference on the two sides of dial piece type switch by flow pressure sensor, converts pressure signal into electric signal, controls the closure number of switch in different flow channels, and provides suitable damping for different load conditions.The flow channel arrangement form of the rubber covering layer of the hydraulic bushing of the present application makes the hydraulic bushing have the characteristics of flow self-regulation and controllable damping, the design of metal aluminum inner tube and outer sleeve layer makes the hydraulic bushing have the characteristics of good durability and light weight, which is beneficial to attenuate the vibration and impact of road excitation on vehicle body, and improve the smoothness of the vehicle.

Description

Technical Field

[0001] This invention relates to a hydraulic bushing structure for self-regulating flow under multiple operating conditions, belonging to the field of hydraulic component technology. Background Technology

[0002] Rubber bushings, as a type of damping element, are mainly installed in suspensions, subframes, and stabilizer bars, serving functions such as sealing, wear protection, and load bearing on mechanical components. Hydraulic bushings, as a common flexible connection tool in automotive connection structures, can meet the high damping and low dynamic stiffness characteristics that conventional rubber bushings cannot achieve. This helps to attenuate road excitation vibrations and impacts on the vehicle body, significantly improving overall vehicle ride comfort. The quality and performance of hydraulic bushings directly affect the operating efficiency and lifespan of the vehicle. The selection and use of bushings require scientific and reasonable planning and arrangement based on actual conditions. The bushing structure is mainly determined by the available space for the bushing in the application environment and the load that the application environment needs to withstand.

[0003] Existing hydraulic bushings on the market form a closed liquid chamber between a rubber cover layer and the inner wall of the outer jacket to store liquid. They often suffer from problems such as insignificant liquid flow regulation, uncontrollable damping, poor durability, poor sealing, inconvenient production, short service life, or low cost performance, which can seriously affect the noise, vibration, and smoothness of automobiles. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of insignificant liquid flow regulation effect and uncontrollable damping in existing hydraulic bushings, and to provide a hydraulic bushing structure with self-regulating flow under multiple working conditions.

[0005] The technical solution implemented by the present invention is as follows: a hydraulic bushing structure for self-regulating flow under multiple working conditions, comprising an inner tube, an outer sleeve, and a rubber covering layer. The rubber cover layer is a cylindrical structure with a cylindrical inner cavity connected to an inner tube at the center of its axis. Two rounded trapezoidal convex liquid chambers, gradually narrowing from top to bottom and from outside to inside along their symmetrical front and rear cylindrical sides, are formed in the rubber cover layer. The two liquid chambers are opposite each other relative to the axis of the rubber cover layer. The rubber cover layer has a four-way flow channel and a central flow channel with an annular groove structure, arranged symmetrically relative to the bushing along its axis. These channels form a flow channel with the inner wall of the outer layer, with a relatively narrow width at the contact point with the liquid chambers. The overall flow channel is convex in shape. A central flow channel switch, a four-way flow channel switch, and a flow and pressure sensor are respectively installed in the central flow channel and the four-way flow channel. Flow and pressure sensors are installed on both sides of the central flow channel switch and the four-way flow channel switch, adjusting the opening degree of the switch based on the flow and pressure difference. The flow and pressure sensors are installed in the central flow channel and the four-way flow channel of the hydraulic bushing, and each flow channel switch is connected to two flow and pressure sensors.

[0006] The hydraulic bushing structure senses the pressure difference on both sides of the flow channel switch through a flow and pressure sensor, converts the pressure signal into an electrical signal, controls the number of switches closed in different flow channels, and provides appropriate damping for different load conditions.

[0007] The top and bottom of the rubber cover layer are respectively provided with arc-shaped, rounded-corner convex buffer blocks that are symmetrical to the center of the rubber cover layer.

[0008] The flow channel switch is a toggle switch.

[0009] The four-way flow channel, the middle flow channel, and the rubber portion of the rubber cover layer are connected by a rounded transition.

[0010] The inner tube has a circular cylindrical cross-section. Five weight-reducing holes are arranged in the axial direction of the inner core. One circular weight-reducing hole passes through the central axis of the inner core, and four elongated kidney-shaped weight-reducing holes are close to the outer diameter of the inner core and are evenly arranged in the circumferential direction.

[0011] The outer jacket has a circular cross-section and a cylindrical structure, with a through hole along the axial direction of the outer jacket.

[0012] The rubber covering layer is embedded into the gap between the inner tube and the outer layer by high-temperature vulcanization and cooling treatment.

[0013] The inner tube is made of aluminum; the outer jacket is made of aluminum; and carbon black is added to the rubber covering layer.

[0014] The working principle of the hydraulic bushing structure for self-regulating flow under multiple working conditions of the present invention is as follows: The rubber covering layer 2 of this invention is provided with six equal-section intermediate flow channels 203 and four-way flow channels 204 connected to two liquid chambers 202. Intermediate flow channel switches, four-way flow channel switches, and flow and pressure sensors are respectively installed in the intermediate flow channels. When the hydraulic bushing is in a static state, both intermediate flow channel switches 205 and four-way flow channel switches 206 are closed, and the liquid is stationary with no flow. When the hydraulic bushing is operating under high-frequency, low-amplitude conditions, intermediate flow channel switch 205 is open, and four-way flow channel switch 206 is closed, with the liquid circulating only through intermediate flow channel 203. When the hydraulic bushing is operating under low-frequency, high-amplitude conditions, both intermediate flow channel switches 205 and four-way flow channel switches 206 are open, and the liquid circulates through intermediate flow channel 203 and four-way flow channel 204. Flow and pressure sensors are installed in the intermediate flow channels and four-way flow channels of the hydraulic bushing, and each flow channel switch (i.e., a toggle switch) is connected to two flow and pressure sensors. When liquid flows through the flow channel under different load conditions, the flow pressure sensor senses the pressure on both sides of the toggle switch. The pressure is measured by the deformation of the diaphragm on both sides of the switch. When pressure is applied to the diaphragm, the diaphragm deforms. By measuring the degree of deformation, the applied pressure difference is determined, controlling the number of switches closed in different flow channels and providing appropriate damping for different load conditions. This achieves self-regulation of flow rate under multiple operating conditions.

[0015] Compared with the prior art, the technological advancements of this invention are as follows: The self-regulating hydraulic bushing of this invention comprises, from the inside out, an inner tube, a rubber covering layer, and an outer sleeve. The inner tube is made of aluminum, and the aluminum inner tube, rubber covering layer, and outer sleeve are integrally formed. This arrangement of the aluminum inner tube and outer sleeve ensures the durability and lightweight characteristics of the bushing. The special structure of the rubber covering layer effectively regulates the flow rate of the liquid in the liquid chamber and improves the overall strength of the rubber covering layer. The flow channel arrangement of the rubber covering layer gives this hydraulic bushing the characteristics of self-regulating flow and controllable damping. The cooperation between the rubber covering layer and the outer sleeve ensures the sealing of the liquid chamber and prevents relative sliding of the rubber covering layer. This structure also simplifies the production complexity of the bushing, improves production efficiency, and reduces costs.

[0016] The flow self-regulating hydraulic bushing of the present invention has significant technical advantages over common bushings on the market in terms of structure, flow self-regulation, controllable damping, and ability to withstand complex load scenarios involving low-frequency large-amplitude and high-frequency small-amplitude conditions.

[0017] In summary, the flow self-regulating hydraulic bushing of the present invention has the characteristics of flow self-regulation and controllable damping, as well as certain durability and lightweight features. It shortens the production process, improves production efficiency, and reduces costs. It is suitable for load conditions that need to withstand complex interactions between low-frequency large amplitude conditions and high-frequency small amplitude conditions. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is another structural schematic diagram of the present invention; Figure 3 This is another structural schematic diagram of the present invention; Figure 4 This is a schematic diagram of the inner tube structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the rubber covering layer in an embodiment of the present invention; Figure 6 This is a schematic diagram of another structure of the rubber covering layer according to an embodiment of the present invention; Figure 7 This is a schematic diagram of another structure of the rubber covering layer according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the outer jacket layer in an embodiment of the present invention; Figure 9 This is an AA cross-sectional view of the rubber cover layer; Figure 10 This is a cross-sectional view of the rubber cover layer (BB). In the diagram: 1 is the inner tube; 2 is the rubber covering layer; 3 is the outer jacket layer; 4 is the flow channel; 5 is the flow and pressure sensor; 6 is the toggle switch; 101 is the surrounding weight reduction hole; 102 is the central weight reduction hole; 201 is the arc-shaped rounded corner boss; 202 is the hydraulic chamber; 203 is the middle flow channel; 204 is the four-way flow channel; 205 is the middle flow channel switch; 206 is the four-way flow channel switch. Detailed Implementation

[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

[0020] This embodiment discloses a hydraulic bushing structure for self-regulating flow under multiple operating conditions, such as... Figure 1 As shown, the flow-regulating hydraulic bushing structure of this embodiment includes an inner tube 1, a rubber covering layer 2, and an outer sleeve layer 3. The inner tube 1 is made of aluminum, and adopts a novel structure, such as... Figure 4 As shown, the structure is configured such that the cross-section of the inner tube 1 is circular, and five weight-reducing holes are arranged in the axial direction of the inner core. Four of these holes are elongated, waist-shaped, and 101, which are evenly distributed around the circumference and close to the outer diameter of the inner core. One weight-reducing hole 102 passes through the central axis of the inner core. This structure achieves weight reduction while ensuring the structural strength of the hydraulic bushing, and ensures sufficient contact between the inner tube 1 and the rubber cover layer 2, avoiding stress concentration.

[0021] The rubber cover layer 2 effectively improves the bushing's durability. To reduce the contact between the rubber cover layer 2 and the external environment, arc-shaped, rounded-corner boss-shaped bumpers 201 are provided at the top and bottom of the rubber cover layer 2, such as... Figure 2 and Figure 3 As shown. Two rounded trapezoidal boss-structured liquid chambers 202 are positioned symmetrically on the front and rear sides of the rubber cover layer 2, with no liquid chambers on the left and right sides. This enhances the durability of the rubber portion of the hydraulic bushing, reduces the risk of leakage, and simplifies maintenance. The rubber cover layer 2 is provided with six equal-section intermediate flow channels 203 and four-way flow channels 204 connected to the two liquid chambers 202, as shown. Figure 5 and sectional view Figure 9 and Figure 10 As shown; the intermediate flow channel 203 and the four-way flow channel 204 are convex shapes that are narrower near the liquid chamber 202. The rubber cover layer 2 is injected into the inner tube 1 and the outer layer 3 of the new structure bushing after adding carbon black material and vulcanizing at high temperature.

[0022] Figure 5 , Figure 6 and Figure 7 All of these are structural features of the hydraulic bushing rubber parts, corresponding to the number of closed paddle switches under different working conditions.

[0023] Figure 5 When in static setting state, both the intermediate flow channel switch 205 and the four-way flow channel switch 206 are closed, and the liquid is stationary with no flow. Figure 6 In order to achieve flow circulation of liquid only through the intermediate flow channel 203 under high frequency and small amplitude conditions, the intermediate flow channel switch 205 is opened and the four-way flow channel switch 206 is closed. Figure 7 To ensure proper operation under low-frequency, high-amplitude conditions, both the intermediate flow channel switch 205 and the four-way flow channel switch 206 are open, allowing liquid to circulate through the intermediate flow channel 203 and the four-way flow channel 204. The arrows in the diagram indicate the direction of liquid flow in the channels when the paddle switches are closed under different operating conditions. Flow and pressure sensors are installed in the intermediate and four-way flow channels of the hydraulic bushing, with each paddle switch connected to two flow and pressure sensors. The pressure on both sides of the paddle switches is sensed as liquid flows through the channels under different load conditions. The pressure is measured by the deformation of the diaphragms on both sides of the switches. When pressure is applied to the diaphragms, they deform. The degree of deformation is measured to determine the applied pressure difference, controlling the number of switches closed in different channels and providing appropriate damping for different load conditions.

[0024] like Figure 8As shown, the outer jacket 3 is made of aluminum. The outer jacket 3 has a structure that can be sealed with the rubber cover layer 2. The outer jacket 3 and the rubber cover layer 2 cooperate with each other. The structure of the outer jacket 3 can effectively improve the sealing performance of the liquid chamber 202, the intermediate flow channel 203 and the four-way flow channel 204, and also prevent the relative sliding between the rubber cover layer 2 and the outer jacket 3.

Claims

1. A hydraulic bushing structure for self-regulating flow under multiple operating conditions, comprising an inner tube, an outer sleeve, and a rubber covering layer, characterized in that, The rubber cover layer has two rounded trapezoidal convex liquid chambers with gradually narrowing corners from top to bottom and from outside to inside along its symmetrical front and rear cylindrical sides. The rubber cover layer has a four-way flow channel and a middle flow channel with an annular groove structure. The four-way flow channel and the middle flow channel are arranged symmetrically with respect to the bushing and form a flow channel between them and the inner wall of the outer layer. The width of the flow channel at the contact point with the liquid chamber is relatively narrow, and the flow channel is convex in shape. A middle flow channel switch is provided in the middle flow channel, and a four-way flow channel switch is provided in the four-way flow channel. Flow and pressure sensors are installed on both sides of the middle flow channel switch and the four-way flow channel switch. When the hydraulic bushing is in a static setting state, both the intermediate flow channel switch and the four-way flow channel switch are closed, and the liquid is stationary with no flow. When the hydraulic bushing is in a high-frequency, low-amplitude condition, the intermediate flow channel switch is open and the four-way flow channel switch is closed, and the liquid circulates only through the intermediate flow channel. When the hydraulic bushing is in a low-frequency, high-amplitude condition, both the intermediate flow channel switch and the four-way flow channel switch are open, and the liquid circulates through both the intermediate flow channel and the four-way flow channel. The hydraulic bushing structure senses the pressure difference on both sides of the flow channel switch through a flow and pressure sensor, converts the pressure signal into an electrical signal, controls the number of switches closed in different flow channels, and provides appropriate damping for different load conditions.

2. The hydraulic bushing structure for self-regulating flow under multiple operating conditions according to claim 1, characterized in that, The inner tube has a circular cylindrical cross-section. Five weight-reducing holes are arranged in the axial direction of the inner core. One circular weight-reducing hole passes through the central axis of the inner core, and the other four elongated weight-reducing holes are close to the outer diameter of the inner core and are evenly arranged in the circumferential direction.

3. The hydraulic bushing structure for self-regulating flow under multiple operating conditions according to claim 1, characterized in that, The outer jacket has a cylindrical structure with a circular cross-section, and a circular through hole is provided along the axial direction of the inner core, passing through the central axis of the outer jacket.

4. The hydraulic bushing structure for self-regulating flow under multiple operating conditions according to claim 1, characterized in that, The rubber covering layer is embedded into the gap between the inner tube and the outer layer by high-temperature vulcanization and cooling treatment.

5. A hydraulic bushing structure for self-regulating flow under multiple operating conditions according to claim 1, characterized in that, The top and bottom of the rubber cover layer are respectively provided with arc-shaped, rounded-corner convex buffer blocks that are symmetrical to the center of the rubber cover layer.

6. A hydraulic bushing structure for self-regulating flow under multiple operating conditions according to claim 1, characterized in that, The four-way flow channel, the middle flow channel, and the rubber portion of the rubber cover layer are connected by a rounded transition.

7. A hydraulic bushing structure for self-regulating flow under multiple operating conditions according to claim 1, characterized in that, The flow channel switch is a toggle switch.

8. A hydraulic bushing structure for self-regulating flow under multiple operating conditions according to claim 1, characterized in that, The inner tube is made of aluminum; the outer jacket is made of aluminum; and carbon black is added to the rubber covering layer.

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