CN112248786A - An engine mount bracket resonance suppression mechanism - Google Patents

Abstract

A resonance suppression mechanism for an engine mount bracket relates to the field of engine brackets. The engine mount bracket resonance suppression mechanism includes two engine mount brackets respectively connected to both sides of the engine, a frame longitudinal beam and a vibration suppression component connected to the engine mount brackets in a one-to-one correspondence, and each vibration suppression component includes at least one A telescopic oil cylinder, two ends of the telescopic oil cylinder are respectively hinged with the engine and the corresponding engine mounting bracket. The engine mount bracket resonance suppression mechanism provided by the present application can utilize hydraulic oil cylinders to connect and improve the connection rigidity of the mount brackets, and restrain the amplitude of the engine mount brackets through the hydraulic oil cylinders, thereby improving the vibration isolation performance of the engine mount brackets.

Description

An engine mount bracket resonance suppression mechanism

technical field

The present application relates to the field of engine mounts, and in particular, to a resonance suppression mechanism for an engine mount mount.

Background technique

Off-road vehicles often use large-displacement commercial vehicle engines to meet the requirements of climbing and off-roading, but the large-displacement engines vibrate too much when running, and their NVH performance must meet the standards of passenger vehicles, which is very important for engine mounts. Vibration isolation performance puts forward higher requirements.

As shown in FIG. 1 , the existing automobile engine mount generally uses an engine mount bracket 110 to fix the engine 100 to the frame rail 120 , wherein the engine mount bracket 110 generally includes an engine side mount connected to the engine 100 . The bracket 111 , the frame side suspension bracket 112 connected with the frame side member 120 , and the suspension cushion 113 connected with the engine side suspension bracket 111 and the frame side suspension bracket 112 . In order to achieve reasonable frequency avoidance, it is a common practice to increase the stiffness of the active end mount bracket of the engine. Generally, the first-order mode of the active end mount bracket of the passenger car engine is >800Hz. The improvement of mounting vibration isolation performance of the large-displacement engine did not play any role. Through further analysis, it is found that although the first-order mode of the mount bracket is improved in the test, the first-order mode is only the free mode of the part itself. The stiffness weight is large (the mass of a single bracket exceeds 10kg), resulting in no increase in the actual first-order mode of the suspension bracket.

Therefore, there is a need for a device capable of improving the vibration isolation performance of the engine mount bracket and improving the connection rigidity of the mount bracket.

SUMMARY OF THE INVENTION

The purpose of the present application is to provide a resonance suppression mechanism for an engine mount bracket, which can connect and improve the connection rigidity of the mount bracket by using a hydraulic oil cylinder, and restrain the amplitude of the engine mount bracket through the hydraulic oil cylinder, thereby improving the performance of the engine mount bracket. Vibration isolation performance.

The embodiments of the present application are implemented as follows:

An embodiment of the present application provides a resonance suppression mechanism for an engine mount bracket, which includes two engine mount brackets connected to both sides of the engine respectively, and a frame longitudinal beam and a vibration suppression assembly that are connected to the engine mount brackets in a one-to-one correspondence. Each vibration suppression assembly includes at least one telescopic oil cylinder, and both ends of the telescopic oil cylinder are respectively hinged with the engine and the corresponding engine mount bracket.

In some optional embodiments, each vibration suppression assembly includes an oil pump, an oil storage tank, a diverter valve, and a plurality of telescopic oil cylinders arranged at intervals along the circumference of the corresponding engine mount bracket, the oil pump is communicated with the diverter valve, and the oil storage tank It is communicated with the shunt valve, and the shunt valve is communicated with each telescopic oil cylinder respectively.

In some alternative embodiments, the oil pump, oil storage tank and diverter valve are affixed to the corresponding frame rails.

In some alternative embodiments, the oil pump is in communication with the oil storage tank.

In some alternative embodiments, the axis of the telescopic cylinder is arranged at an angle of 30-75 degrees to the side of the engine.

In some alternative embodiments, the axis of the telescopic cylinder is arranged at an angle of 45-50 degrees to the side of the engine.

In some optional embodiments, a controller is further included, and the controller is configured to receive the engine speed signal and drive the oil pump of each vibration suppression assembly to open and close.

In some optional embodiments, it also includes two acceleration sensors electrically connected to the controller, the acceleration sensors are respectively used to detect the vibration of the two engine mount brackets; the controller is used to receive the acceleration signals detected by the two acceleration sensors , and drive the oil pump of each vibration suppression component to open and close.

The beneficial effects of the present application are: the engine mount bracket resonance suppression mechanism provided in this embodiment includes two engine mount brackets respectively connected to both sides of the engine, a frame longitudinal beam connected to the engine mount brackets in a one-to-one correspondence, and a damper Each vibration damping assembly includes at least one telescopic oil cylinder, and both ends of the telescopic oil cylinder are respectively hinged with the engine and the corresponding engine mount bracket. The engine mount bracket resonance suppression mechanism provided in this embodiment can utilize hydraulic cylinders to connect and improve the connection rigidity of the mount bracket, and restrain the amplitude of the engine mount bracket through the hydraulic cylinder, thereby improving the vibration isolation performance of the engine mount bracket.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the following drawings will briefly introduce the drawings that need to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic structural diagram of the connection between an existing engine mount bracket and an engine;

2 is a schematic structural diagram of the connection between the engine mount bracket resonance suppression mechanism and the engine provided in Embodiment 1 of the application;

3 is a schematic structural diagram of the connection between the engine mount bracket resonance suppression mechanism and the engine provided in Embodiment 2 of the present application.

In the figure: 100, engine; 110, engine suspension bracket; 111, engine side suspension bracket; 112, frame side suspension bracket; 113, suspension cushion; 120, frame longitudinal beam; 130, telescopic oil cylinder; 140, oil pump; 150, oil storage tank; 160, diverter valve; 170, controller; 180, acceleration sensor.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. The components of the embodiments of the present application generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application as claimed, but is merely representative of selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of the application is usually placed in use, and is only for the convenience of describing the application and simplifying the description, rather than indicating or implying The device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation of the present application. Furthermore, the terms "first", "second", "third", etc. are only used to differentiate the description and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhanging" etc. do not imply that a component is required to be absolutely horizontal or overhang, but rather may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", it does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "arrangement", "installation", "connection" and "connection" should be interpreted in a broad sense, for example, it may be a fixed connection, It can also be a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood in specific situations.

In this application, unless otherwise expressly specified and defined, a first feature "on" or "under" a second feature may include direct contact between the first and second features, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

The features and performance of the engine mount bracket resonance suppression mechanism of the present application will be further described in detail below with reference to the embodiments.

Example 1

As shown in FIG. 2 , an embodiment of the present application provides an engine mount bracket resonance suppression mechanism, which includes two engine mount brackets 110 connected to both sides of the engine 100 respectively, and two engine mount brackets 110 connected to the engine mount brackets 110 in a one-to-one correspondence. The frame rail 120 and the vibration suppression assembly; wherein, each engine mount bracket 110 includes an engine side mount bracket 111 connected with the engine 100 , a frame side mount bracket 112 connected with the corresponding frame rail 120 , and The suspension cushion 113 connecting the engine side suspension bracket 111 and the frame side suspension bracket 112 .

Each vibration suppression assembly includes four telescopic oil cylinders 130 , an oil pump 140 , an oil storage tank 150 and a diverter valve 160 , and the four telescopic oil cylinders 130 are respectively disposed on the upper, lower, left and right sides of the engine-side suspension bracket 111 in the corresponding engine suspension bracket 110 . The cylinder blocks of the four telescopic oil cylinders 130 are hinged with the engine 100 respectively, the cylinder rods of the four telescopic oil cylinders 130 are hinged with the engine side mounting brackets 111 in the corresponding engine mounting brackets 110, the oil pump 140, the oil storage tank 150 and the The diverter valve 160 is fixed on the corresponding frame rail 120 , the oil pump 140 communicates with the corresponding diverter valve 160 through an oil pipe, the oil storage tank 150 communicates with the corresponding diverter valve 160 through an oil pipe, and the oil pump 140 communicates with the corresponding oil storage tank 150 through an oil pipe. The oil pipes are connected, and the diverter valves 160 are respectively connected with the rodless cavities of the corresponding four telescopic oil cylinders 130 through oil pipes. A controller 170 is also fixed on one frame rail 120. The controller 170 is electrically connected to the oil pumps 140 of the two vibration suppression assemblies respectively. The controller 170 is used to receive the engine speed signal and drive the oil pumps 140 of the two vibration suppression assemblies. Opening and closing.

The engine mount bracket resonance suppression mechanism provided in this embodiment can effectively improve the strength of the engine mount bracket 110 and restrain the engine from running by providing vibration suppression components that are connected to the engine mount brackets 110 on both sides of the engine 100 in one-to-one correspondence. At the same time, it drives the resonance generated by the engine mount bracket 110, so as to achieve the purpose of improving the vibration isolation performance of the engine mount bracket 110, wherein the suppression component includes four telescopic oil cylinders arranged along the circumference of the engine side mount bracket 111 in the engine mount bracket 110. 130, and the cylinder body and the cylinder rod of the telescopic oil cylinder 130 are hinged with the engine 100 and the engine side suspension bracket 111 respectively, and an oil pump 140 and an oil storage tank are fixedly arranged on the frame longitudinal beam 120 correspondingly connected to the engine suspension bracket 110. 150 and the diverter valve 160, the hydraulic oil in the oil storage tank 150 can be passed through the diverter valve 160 into the rodless cavity of the four telescopic oil cylinders 130 through the oil pump 140, thereby driving the cylinder rods of the four telescopic oil cylinders 130 to extend to the engine. The engine side mount bracket 111 of the mount bracket 110 exerts pressure to restrain the engine side mount bracket 111 from vibrating when the engine 100 is running. Meanwhile, the four telescopic oil cylinders 130 are located in four directions corresponding to the engine side mount bracket 111 . , when the four telescopic oil cylinders 130 extend out of the cylinder rod at the same time, the present invention can stably limit the position of the engine side mount bracket 111 , effectively prevent the engine side mount bracket 111 from vibrating with the engine 100 and make the engine side mount bracket 110 vibrate. The resonance amplitude is reduced, so as to achieve the purpose of suppressing the resonance.

The oil pump 140, the oil storage tank 150 and the diverter valve 160 are fixed on the corresponding frame rails 120, which can reduce the vibration of the engine 100 during operation and prolong the service life of the oil pump 140, the oil storage tank 150 and the diverter valve 160; the oil pump 140 and the The corresponding diverter valve 160 is communicated through the oil pipe, the oil storage tank 150 is communicated with the corresponding diverter valve 160 through the oil pipe, and the oil pump 140 is communicated with the corresponding oil storage tank 150 through the oil pipe, which can ensure that sufficient hydraulic oil is injected by the oil pump 140 through the diverter valve 160. Inside each telescopic oil cylinder 130; the axis of the telescopic oil cylinder 130 is arranged at an angle of 45 degrees to the side of the engine 100, which can ensure that the two ends of the telescopic oil cylinder 130 stably press against the engine 100 and the engine side suspension bracket 111 of the engine suspension bracket 110. The controller 170 fixed on the frame rail 120 can receive the engine speed signal input from the outside, and drive the oil pumps 140 of the two vibration suppression components to open and close. When the engine speed exceeds the set target speed, the controller 170 controls the two oil pumps. 140 is turned on to input hydraulic oil into the eight telescopic oil cylinders 130 respectively, so as to suppress the vibration of the two engine mount brackets 110. When the engine speed is lower than the set target value, the controller 170 controls the two oil pumps 140 to turn off.

Example 2

As shown in FIG. 3 , the structure of the engine mount bracket resonance suppression mechanism provided in this embodiment is substantially the same as that of the engine mount bracket resonance suppression mechanism provided in Embodiment 1. The difference is that in this embodiment, each engine side mount bracket has 111 is provided with an acceleration sensor 180 electrically connected to the controller 170, the acceleration sensor 180 is used to detect the vibration of the corresponding engine side suspension bracket 111; the controller 170 is used to receive the acceleration signals detected by the two acceleration sensors 180, And drive the oil pump 140 of the two vibration suppression components to open and close.

The engine mount bracket resonance suppression mechanism provided in this embodiment detects the vibration of the corresponding engine side mount brackets 111 by the acceleration sensors 180 disposed on the two engine side mount brackets 111, and sends a signal to the controller 170 to control The oil pumps 140 of the two vibration suppression components are turned on and off. When the signal output by the acceleration sensor 180 exceeds the set value, the controller 170 controls the two oil pumps 140 to turn on and input hydraulic oil into the eight telescopic oil cylinders 130 respectively, thereby inhibiting the two engines. Due to the vibration of the side suspension bracket 111, when the signal output by the acceleration sensor 180 is lower than the set value, the controller 170 controls the two oil pumps 140 to turn off.

The embodiments described above are a part of the embodiments of the present application, but not all of the embodiments. The detailed descriptions of the embodiments of the application are not intended to limit the scope of the application as claimed, but are merely representative of selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

Claims (8)

1. The engine suspension support resonance suppression mechanism is characterized by further comprising vibration suppression assemblies in one-to-one correspondence with the engine suspension supports, each vibration suppression assembly comprises at least one telescopic oil cylinder, and two ends of each telescopic oil cylinder are hinged to the engine and the corresponding engine suspension supports respectively.

2. The engine mount bracket resonance suppression mechanism according to claim 1, wherein each of said vibration suppression assemblies comprises an oil pump, an oil storage tank, a flow divider valve, and a plurality of telescopic cylinders arranged at intervals along a circumference corresponding to said engine mount bracket, said oil pump being in communication with said flow divider valve, said oil storage tank being in communication with said flow divider valve, said flow divider valve being in communication with each of said telescopic cylinders, respectively.

3. The engine mount bracket resonance suppression mechanism according to claim 2, wherein said oil pump, said oil reservoir, and said flow divider valve are fixed to said corresponding frame rails.

4. The engine mount bracket resonance suppression mechanism according to claim 2, characterized in that the oil pump and the oil tank communicate.

5. The engine mount bracket resonance suppression mechanism of claim 1, wherein the axis of the telescopic cylinder is arranged at an angle of 30-75 degrees with respect to the engine side surface.

6. The engine mount bracket resonance suppression mechanism of claim 5, wherein the axis of the telescopic cylinder is arranged at an angle of 45-50 degrees with respect to the side surface of the engine.

7. The engine mount bracket resonance suppression mechanism according to claim 2, further comprising a controller for receiving an engine speed signal and driving the oil pump of each of the vibration suppression assemblies to open and close.

8. The engine mount bracket resonance suppression mechanism according to claim 7, further comprising two acceleration sensors electrically connected to said controller, said acceleration sensors being respectively configured to detect vibration conditions of two of said engine mount brackets; the controller is used for receiving acceleration signals detected by the two acceleration sensors and driving the oil pump of each vibration suppression component to be opened and closed.

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