Suspension device for automobile engine

Abstract

The invention relates to the technical field of suspension devices, in particular to a suspension device for an automobile engine, which comprises a laminated main body and a connecting arm mounted at the top end of the laminated main body and used for connecting the engine with an automobile body, the laminated main body comprises a wear-resistant outer layer, a damping transition layer arranged on the bottom surface of the wear-resistant outer layer and a tensile core layer arranged on the bottom surface of the damping transition layer, and the wear-resistant outer layer comprises a main body made of a composite ceramic microsphere reinforced polyurethane matrix and a carbon fiber reinforced composite material wrapping the outer layer of the main body. The wear-resistant outer layer reduces vibration energy and prevents the vibration energy from being transmitted to an automobile body, and when the engine vibrates at medium-high frequency, the damping transition layer reduces medium-high frequency vibration energy and prevents the medium-high frequency vibration energy from being transmitted to the automobile body, so that the aim that a worker does not need to periodically detect the suspension device while the automobile engine is fixedly supported is achieved; and the oil leakage condition of the stacked main body is avoided.

Description

Technical Field

[0001] This application relates to the technical field of suspension devices, and particularly to a suspension device for an automotive engine. Background Art

[0002] The suspension device for an automotive engine is an important component in the vehicle powertrain system. It is mainly used to fix and support the engine, and at the same time isolate the transmission of engine vibration to the vehicle body, improving the comfort and NVH (Noise, Vibration, and Harshness) performance of the vehicle. Its specific structure includes a base, a hydraulic suspension device installed on the base, and a bracket installed on the hydraulic suspension device for connecting the engine and the vehicle body. When the engine vibrates, it is transmitted to the hydraulic suspension device through the bracket. The liquid in the hydraulic suspension device flows, and the vibration energy is dissipated due to inertia, friction, and turbulence effects during the flow process, damping the engine.

[0003] However, the hydraulic suspension device may leak oil during use, affecting the damping effect of the hydraulic suspension device, and causing the staff to regularly detect the hydraulic suspension device to prevent oil leakage. Therefore, this application proposes a suspension device for an automotive engine, which can fix and support the automotive engine without the need for the staff to regularly detect the suspension device. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of this application is to provide a suspension device for an automotive engine, which can fix and support the automotive engine without the need for the staff to regularly detect the suspension device.

[0005] The above object of this application is achieved through the following technical solutions: A suspension device for an automotive engine includes a laminated main body and a connecting arm installed at the top of the laminated main body for connecting the engine and the vehicle body. The laminated main body includes a wear-resistant outer layer, a damping transition layer provided on the bottom surface of the wear-resistant outer layer, and a tensile core layer provided on the bottom surface of the damping transition layer. The wear-resistant outer layer includes a main body made of a composite ceramic microsphere-reinforced polyurethane matrix and a carbon fiber-reinforced composite material wrapped around the outer layer of the main body.

[0006] Furthermore, the damping transition layer includes a contact plate provided on the periphery of the wear-resistant outer layer, a support plate provided on the bottom surface of the wear-resistant outer layer and fixedly connected to the tensile core layer, a plurality of conical silica gel columns with one end provided on the upper surface of the support plate and the other end connected to the bottom surface of the contact plate, and a metal spring sleeved on the conical silica gel column and fixedly connected to the support plate and the contact plate at the upper and lower ends respectively. The end with the largest diameter of the conical silica gel column is fixedly connected to the support plate, and the end with the smallest diameter is connected to the contact plate.

[0007] By adopting the above technical solution, the staff installs the laminated main body on the vehicle body, then installs the connecting arm on the wear-resistant outer layer, and then installs the engine on the connecting arm. When the engine vibrates at low frequency, the vibrating force is transmitted to the wear-resistant outer layer. The carbon fiber reinforced composite material generates micro-deformation to compensate for the wear amount. The composite ceramic microsphere reinforced polyurethane matrix improves the surface hardness while maintaining the matrix elasticity, balances the wear resistance and impact resistance, reduces the vibration energy, and prevents it from being transmitted to the vehicle body. When the engine vibrates at medium and high frequencies, the vibration energy continues to be transmitted to the damping transition layer. The conical silica gel columns of the damping transition layer are compressed after receiving the vibration energy, and produce a non-linear stiffness change during compression. At the same time, the metal springs cooperate with the conical silica gel columns to form a multi-stage damping response, covering the high-frequency and medium-frequency vibration ranges, reducing the medium and high-frequency vibration energy, and preventing it from being transmitted to the vehicle body. It realizes the purpose of fixedly supporting the automotive engine without the need for staff to regularly detect the mounting device, and the laminated main body will not leak oil either.

[0008] Further, a ball head is embedded at the top end of the conical silica gel column, and the conical silica gel column is connected to the abutting plate through the ball head.

[0009] By adopting the above technical solution, although the setting of the damping transition layer can reduce the medium and high-frequency vibration energy and prevent it from being transmitted to the vehicle body, since the smallest diameter end of the conical silica gel column is connected to the abutting plate to form the effect of multi-stage damping, this causes the top end of the conical silica gel column to be prone to fatigue and the conical silica gel column to break. The setting of the ball head solves this technical problem. Through the setting of the sphere, the conical silica gel column is connected to the abutting plate through the ball head, so that the abutting plate can vibrate flatly at the top end of the conical silica gel column. That is, when the abutting plate can transmit the pressure to the conical silica gel column, it does not bend the top end of the conical silica gel column, thereby improving the service life of the conical silica gel column, and the multi-stage damping effect of the conical silica gel column still exists.

[0010] Further, a damping mechanism is provided between the wear-resistant outer layer and the damping transition layer.

[0011] Further, the damping mechanism includes a conical guide post and a spiral groove opened on the inner cavity of the conical guide post. The smallest diameter end of the conical guide post is fixedly connected to the bottom surface of the wear-resistant outer layer.

[0012] By adopting the above technical solution, although the setting of the ball head improves the service life of the conical silica gel column, since the conical silica gel column is not fixedly connected to the abutting plate, the vibration forces in the left-right and front-back directions cannot be effectively transmitted to the conical silica gel column. At this time, only the metal spring provides shock absorption for the wear-resistant outer layer, which may cause the damping transition layer to be unable to effectively reduce the medium and high-frequency vibration energy. The setting of the damping mechanism solves this technical problem. Through the setting of the damping mechanism, because the conical guide post is arranged between the wear-resistant outer layer and the damping transition layer, there is enough space to make the conical guide post larger (to prevent premature fracture of the end of the conical guide post fixedly connected to the bottom surface of the wear-resistant outer layer). The spiral channel extends the shear path of the vibration energy, enhances the medium and high-frequency energy consumption of the vibration energy, and assists the damping transition layer to effectively reduce the medium and high-frequency vibration energy.

[0013] Furthermore, the damping mechanism further includes an elastic energy storage plate arranged on the support plate and a buffer plate fixedly arranged on the elastic energy storage plate. A plurality of honeycomb-shaped through holes are formed in the buffer plate, and the top surface of the buffer plate is fixedly connected to the end with the largest diameter of the conical guide post.

[0014] By adopting the above technical solution, through the setting of the elastic energy storage plate and the buffer plate, when the conical guide post absorbs the vibration energy, the vibration energy is transmitted to the buffer plate through the spiral channel. The inner walls of the honeycomb-shaped through holes on the buffer plate are bent and compressed and deformed, converting the impact kinetic energy into the plastic deformation of the material, so that the buffer plate absorbs the transient impact load. At this time, the elastic energy storage plate is compressed and deformed to store energy when compressed, and slowly releases energy when unloaded, further improving the absorption rate of the damping mechanism for the vibration energy.

[0015] Furthermore, through holes penetrating the connecting arm are formed on both sides of one end of the connecting arm, and an installation structure for installing the connecting arm through the through holes is arranged on the top surface of the wear-resistant outer layer.

[0016] Furthermore, the installation structure includes two opposite installation plates arranged on the top surface of the wear-resistant outer layer, installation threaded holes formed on the opposite surfaces of the two installation plates and penetrating the installation plates, and installation bolts passing through the connecting arm and the installation plates through the through holes and the installation threaded holes.

[0017] By adopting the above technical solution, when installing the connecting arm on the wear-resistant outer layer, first place the connecting arm between the two installation plates and make the installation threaded holes opposite to the through holes, and then use the installation bolts to pass through the connecting arm and the installation plates through the through holes and the installation threaded holes, so that the connecting arm is fixed to the wear-resistant outer layer.

[0018] Furthermore, the elastic energy storage plate is mainly made of shape memory alloy.

[0019] By adopting the above technical solution, the elastic energy storage plate made of shape memory alloy stores elastic energy through phase transformation and slowly releases it after stress removal.

[0020] Further, the tensile core layer is composed of a reticular structure formed by interweaving aramid fibers and shape memory polymers, and the fiber orientation is arranged in a double helix along the principal stress direction.

[0021] By adopting the above technical solution, the double helix arrangement optimizes the anisotropic bearing capacity. When overloaded, the shape memory polymer undergoes molecular chain reconstruction to absorb energy, further enhancing the absorption rate of vibration energy by the laminated main body.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: Through the setting of the laminated main body, the staff installs the laminated main body on the vehicle body, then installs the connecting arm on the wear-resistant outer layer, and then installs the engine on the connecting arm. When the engine vibrates at low frequency, the vibration force is transmitted to the wear-resistant outer layer. The carbon fiber reinforced composite material generates micro-deformation to compensate for the wear amount. The composite ceramic microsphere reinforced polyurethane matrix improves the surface hardness while maintaining the elasticity of the matrix, balancing the wear resistance and impact resistance, reducing the vibration energy, and preventing it from being transmitted to the vehicle body. When the engine vibrates at medium and high frequencies, the vibration energy continues to be transmitted to the damping transition layer. The conical silica gel column of the damping transition layer is compressed after receiving the vibration energy, and a non-linear stiffness change occurs during compression. At the same time, the metal spring cooperates with the conical silica gel column to form a multi-stage damping response, covering the high-frequency and medium-frequency vibration ranges, reducing the medium and high-frequency vibration energy, and preventing it from being transmitted to the vehicle body. It realizes the purpose of fixedly supporting the automotive engine without the need for the staff to regularly detect the suspension device, and the laminated main body will not leak oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of the embodiment; Figure 2 is another view of the overall structure of the embodiment; Figure 3 is Figure 2 the enlarged view of part A in Figure 4 is an exploded view of the specific structure of the damping mechanism.

[0024] Reference numerals: 1, laminated main body; 10, wear-resistant outer layer; 11, damping transition layer; 110, abutting plate; 111, support plate; 112, conical silica gel column; 113, metal spring; 114, ball head; 12, tensile core layer; 2, connecting arm; 3, damping mechanism; 30, conical guide post; 31, spiral groove; 32, elastic energy storage plate; 33, buffer plate; 34, through hole; 4, mounting structure; 40, mounting plate; 41, mounting bolt. Detailed implementation mode

[0025] The following further elaborates on this application in conjunction with the attached drawings.

[0026] Example, referring to Figure 1 , a mounting device for an automotive engine, comprising a laminated main body 1 and a connecting arm 2 mounted on the top of the laminated main body 1 for connecting the engine and the vehicle body. The laminated main body 1 includes a wear-resistant outer layer 10, a damping transition layer 11 provided on the bottom surface of the wear-resistant outer layer 10, and a tensile core layer 12 provided on the bottom surface of the damping transition layer 11. The wear-resistant outer layer 10 includes a main body made of a composite ceramic microsphere-reinforced polyurethane matrix and a carbon fiber-reinforced composite material wrapped around the outer layer of the main body. The damping transition layer 11 includes an abutting plate 110 provided on the periphery of the wear-resistant outer layer 10, a support plate 111 provided on the bottom surface of the wear-resistant outer layer 10 and fixedly connected to the tensile core layer 12, a plurality of tapered silica gel columns 112 with one end provided on the upper surface of the support plate 111 and the other end connected to the bottom surface of the abutting plate 110, and a metal spring 113 sleeved on the tapered silica gel column 112 and fixedly connected to the support plate 111 and the abutting plate 110 at the upper and lower ends respectively. The end with the largest diameter of the tapered silica gel column 112 is fixedly connected to the support plate 111, and the end with the smallest diameter is connected to the abutting plate 110. The staff installs the laminated main body 1 on the vehicle body, then installs the connecting arm 2 on the wear-resistant outer layer 10, and then installs the engine on the connecting arm 2. When the engine vibrates at a low frequency, the vibration force is transmitted to the wear-resistant outer layer 10. The carbon fiber-reinforced composite material generates micro-deformation to compensate for the wear amount. The composite ceramic microsphere-reinforced polyurethane matrix improves the surface hardness while maintaining the elasticity of the matrix, balances the wear resistance and impact resistance, reduces the vibration energy, and prevents it from being transmitted to the vehicle body. When the engine vibrates at a medium and high frequency, the vibration energy continues to be transmitted to the damping transition layer 11. The tapered silica gel column 112 of the damping transition layer 11 is compressed after receiving the vibration energy, and generates a non-linear stiffness change during compression. At the same time, the metal spring 113 cooperates with the tapered silica gel column 112 to form a multi-stage damping response, covering the high-frequency and medium-frequency vibration ranges, reducing the medium and high-frequency vibration energy, and preventing it from being transmitted to the vehicle body. While achieving the purpose of fixedly supporting the automotive engine, it eliminates the need for staff to regularly detect the mounting device, and the laminated main body 1 will not leak oil. Moreover, the tensile core layer 12 is composed of a network structure formed by the interweaving of aramid fibers and shape memory polymers, and its fiber orientation is arranged in a double helix along the principal stress direction. The double helix arrangement optimizes the anisotropic load-bearing capacity, and the shape memory polymer undergoes molecular chain reconstruction to absorb energy during overload, further improving the vibration energy absorption rate of the laminated main body 1.

[0027] Although the setting of the damping transition layer 11 can reduce the medium and high frequency vibration energy and prevent it from being transmitted to the vehicle body, since the smallest diameter end of the conical silica gel column 112 is connected to the abutting plate 110 to form the effect of multi-stage damping, this causes the top end of the conical silica gel column 112 to be prone to fatigue and the conical silica gel column 112 to break. To solve this technical problem, referring to Figure 2 and Figure 3 In this embodiment, a ball head 114 is embedded at the top end of the conical silica gel column 112. The conical silica gel column 112 is connected to the abutting plate 110 through the ball head 114. Through the setting of the sphere, the conical silica gel column 112 is connected to the abutting plate 110 through the ball head 114, so that the abutting plate 110 can vibrate in a plane at the top end of the conical silica gel column 112. That is, when the abutting plate 110 can transmit the pressure to the conical silica gel column 112, it does not bend the top end of the conical silica gel column 112, thereby improving the service life of the conical silica gel column 112, and the effect of multi-stage damping of the conical silica gel column 112 still exists.

[0028] Although the setting of the ball head 114 improves the service life of the conical silica gel column 112, since the conical silica gel column 112 is not fixedly connected to the abutting plate 110, the vibration forces in the left-right and front-back directions cannot be effectively transmitted to the conical silica gel column 112. At this time, only the metal spring 113 provides shock absorption for the wear-resistant outer layer 10. At this time, it may cause the damping transition layer 11 to be unable to effectively reduce the medium and high frequency vibration energy. To solve this technical problem, referring to Figure 4 In this embodiment, a damping mechanism 3 is provided between the wear-resistant outer layer 10 and the damping transition layer 11. The damping mechanism 3 includes a conical guide post 30 and a spiral groove 31 opened on the inner cavity of the conical guide post 30. The smallest diameter end of the conical guide post 30 is fixedly connected to the bottom surface of the wear-resistant outer layer 10. Through the setting of the damping mechanism 3, because the conical guide post 30 is arranged between the wear-resistant outer layer 10 and the damping transition layer 11, there is enough space to make the conical guide post 30 larger (to prevent the end of the conical guide post 30 fixedly connected to the bottom surface of the wear-resistant outer layer 10 from breaking prematurely). The spiral channel extends the shear path of the vibration energy, enhances the medium and high frequency energy consumption of the vibration energy, and assists the damping transition layer 11 to effectively reduce the medium and high frequency vibration energy.

[0029] In this embodiment, the damping mechanism 3 further includes an elastic energy storage plate 32 disposed on the support plate 111 and a buffer plate 33 fixedly disposed on the elastic energy storage plate 32. A plurality of honeycomb-shaped through holes 34 are formed in the buffer plate 33. The top surface of the buffer plate 33 is fixedly connected to the end with the largest diameter of the conical guide post 30. Through the arrangement of the elastic energy storage plate 32 and the buffer plate 33, when the conical guide post 30 absorbs vibration energy, the vibration energy is transmitted to the buffer plate 33 through the spiral channel. The inner walls of the honeycomb-shaped through holes 34 on the buffer plate 33 are bent and compressed and deformed, converting the impact kinetic energy into the plastic deformation of the material, so that the buffer plate 33 absorbs the transient impact load. At this time, the elastic energy storage plate 32 is compressed and deformed to store energy when being compressed, and slowly releases the energy when unloading, further improving the absorption rate of the vibration energy by the damping mechanism 3. Moreover, the elastic energy storage plate 32 is mainly made of shape memory alloy. The elastic energy storage plate 32 made of shape memory alloy stores elastic energy through phase transformation and slowly releases it after the stress is removed.

[0030] In this embodiment, connection holes penetrating the connecting arm 2 are formed on both sides of one end of the connecting arm 2. An installation structure 4 for installing the connecting arm 2 through the connection holes is provided on the top surface of the wear-resistant outer layer 10. The installation structure 4 includes two opposite mounting plates 40 disposed on the top surface of the wear-resistant outer layer 10, installation threaded holes formed on the opposite surfaces of the two mounting plates 40 and penetrating the mounting plates 40, and installation bolts 41 passing through the connecting arm 2 and the mounting plates 40 through the connection holes and the installation threaded holes. When installing the connecting arm 2 on the wear-resistant outer layer 10, first place the connecting arm 2 between the two mounting plates 40 and align the installation threaded holes with the connection holes, and then use the installation bolts 41 to pass through the connecting arm 2 and the mounting plates 40 through the connection holes and the installation threaded holes, so that the connecting arm 2 is fixed to the wear-resistant outer layer 10.

[0031] Specific implementation process: Install the laminated main body 1 on the vehicle body, then place the connecting arm 2 between two mounting plates 40 and align the mounting threaded holes with the connecting holes. Then, use the mounting bolts 41 to pass through the connecting holes and mounting threaded holes, passing through the connecting arm 2 and the mounting plates 40, so that the connecting arm 2 is fixed to the wear-resistant outer layer 10. When the engine vibrates at low frequency, the vibration force is transmitted to the wear-resistant outer layer 10. The carbon fiber reinforced composite material generates micro-deformations to compensate for the wear amount. The composite ceramic microsphere reinforced polyurethane matrix improves the surface hardness while maintaining the matrix elasticity, balancing the wear resistance and impact resistance, reducing the vibration energy, and preventing it from being transmitted to the vehicle body. When the engine vibrates at medium and high frequencies, the vibration energy continues to be transmitted to the damping transition layer 11. The conical silica gel columns 112 of the damping transition layer 11 are compressed after receiving the vibration energy, and produce non-linear stiffness changes during compression. At the same time, the metal springs 113 cooperate with the conical silica gel columns 112 to form a multi-stage damping response, covering the high-frequency and medium-frequency vibration ranges, reducing the medium and high-frequency vibration energy, and preventing it from being transmitted to the vehicle body. At the same time, the vibration energy is transmitted to the buffer plate 33 through the spiral channel. The inner walls of the honeycomb-shaped through holes 34 on the buffer plate 33 are bent for compressive deformation, converting the impact kinetic energy into the plastic deformation of the material, so that the buffer plate 33 absorbs the transient impact load. At this time, the elastic energy storage plate 32 is compressed and deformed when compressed to store energy, and slowly releases it when unloaded.

[0032] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of the application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A suspension device for an automobile engine, characterized in that: The invention comprises a stacked body (1) and a connecting arm (2) installed at the top of the stacked body (1) for connecting an engine and a vehicle body, wherein the stacked body (1) comprises a wear-resistant outer layer (10), a damping transition layer (11) arranged on the bottom surface of the wear-resistant outer layer (10), and a tensile core layer (12) arranged on the bottom surface of the damping transition layer (11), wherein the wear-resistant outer layer (10) comprises a body made of a composite ceramic microsphere reinforced polyurethane matrix and a carbon fiber reinforced composite material wrapped on the outer layer of the body; The damping transition layer (11) comprises an abutment plate (110) arranged on the periphery of the wear-resistant outer layer (10), a support plate (111) arranged on the bottom surface of the wear-resistant outer layer (10) and fixedly connected to the tensile core layer (12), a plurality of conical silicone columns (112) with one end arranged on the upper surface of the support plate (111) and the other end connected to the bottom surface of the abutment plate (110), and a metal spring (113) sleeved on the conical silicone columns (112) and with upper and lower ends respectively fixedly connected to the support plate (111) and the abutment plate (110); one end of the conical silicone column (112) is fixedly connected to the support plate (111) and the other end is connected to the abutment plate (110).

2. A suspension device for an automobile engine according to claim 1, characterized in that: A ball head (114) is embedded in the top end of the conical silicone column (112), and the conical silicone column (112) is connected to the abutment plate (110) via the ball head (114).

3. The automobile engine suspension device according to claim 1, characterized in that: A damping mechanism (3) is provided between the wear-resistant outer layer (10) and the damping transition layer (11).

4. A suspension device for an automobile engine according to claim 3, characterized in that: The damping mechanism (3) comprises a conical guide column (30) and a spiral groove (31) formed on the inner cavity of the conical guide column (30); the end of the conical guide column (30) with the smallest diameter is fixedly connected to the bottom surface of the wear-resistant outer layer (10).

5. A suspension device for an automobile engine according to claim 4, characterized in that: The damping mechanism (3) further comprises an elastic energy storage plate (32) arranged on the support plate (111) and a buffer plate (33) fixedly arranged on the elastic energy storage plate (32), wherein the buffer plate (33) is provided with a plurality of honeycomb-shaped through openings (34), and the top surface of the buffer plate (33) is fixedly connected to the end of the tapered guide column (30) with the largest diameter.

6. The automobile engine suspension device according to claim 1, characterized in that: Connecting holes penetrating the connecting arm (2) are provided on both sides of one end of the connecting arm (2), and a mounting structure (4) for mounting the connecting arm (2) through the connecting holes is provided on the top surface of the wear-resistant outer layer (10).

7. A suspension device for an automobile engine according to claim 6, characterized in that: The mounting structure (4) comprises two mounting plates (40) arranged on the top surface of the wear-resistant outer layer (10) and facing each other, mounting threaded holes provided on the opposite sides of the two mounting plates (40) and penetrating the mounting plates (40), and mounting bolts (41) passing through the connecting holes and the mounting threaded holes and penetrating the connecting arms (2) and the mounting plates (40).

8. The automobile engine suspension device according to claim 5, characterized in that: The elastic energy storage plate (32) is made of shape memory alloy.

9. The automobile engine suspension device according to claim 1, characterized in that: The tensile core layer (12) is composed of a mesh structure in which aramid fibers and shape memory polymers are interwoven, and the fibers are arranged in a double helix along the main stress direction.

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