Mounting method of vehicle-mounted air pump

Abstract

The invention discloses a mounting method of a vehicle-mounted air pump, the mounting method is applied to vibration reduction mounting of the vehicle-mounted air pump on a vehicle chassis, and the mounting method comprises the following steps: providing an adapter plate and a bottom plate, fixedly mounting the vehicle-mounted air pump on the adapter plate, and fixedly mounting the bottom plate on the vehicle chassis; providing shock absorbers, and selecting the target number and target dynamic stiffness of the shock absorbers through a preset mode, so that the frequency ratio between the first inherent frequency of the vehicle-mounted air pump and the second inherent frequency of the shock absorbers is greater than a first preset value; and the adapter plate is mounted on the bottom plate through the shock absorbers with the target number and the target dynamic stiffness. According to the technical scheme, after the adapter plate is installed on the bottom plate through the shock absorbers with the target number and the target dynamic stiffness, the shock absorbers can achieve the shock absorption and noise reduction effects on the vehicle-mounted air pump.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a method for installing a vehicle-mounted air pump. Background Art

[0002] With the rapid development of vehicle autonomous driving technology, autonomous vehicles have been widely used. Usually, autonomous driving vehicles require computing units to perceive the environment based on environmental information collected by multiple sensors (such as cameras, lidar, etc.) to make decisions on controlling the vehicle's driving to control the normal driving of the vehicle.

[0003] In order to enable the sensors to collect real environmental information and ensure the normal operation of autonomous driving, in the prior art, an on-board air pump is usually fixed directly in the vehicle as a high-pressure air source, and then the surfaces of multiple sensors are cleaned separately so that the sensors can collect real environmental information.

[0004] In the existing installation method of the vehicle-mounted air pump, usually a screw structure and a vibration-damping pad are directly used to fix the vehicle-mounted air pump on the vehicle chassis. Although the vibration-damping pad can absorb part of the vibration of the vehicle-mounted air pump, the main function of the vibration-damping pad is to ensure the stability of the connection between the vehicle-mounted air pump and the vehicle chassis, and its vibration-damping effect is slight. As a result, the vehicle-mounted air pump will generate greater vibration and noise during the driving of the vehicle. Summary of the invention

[0005] The main purpose of the present application is to provide a method for installing a vehicle-mounted air pump, aiming to improve the existing method for installing a vehicle-mounted air pump, which is usually directly installed and fixed on the vehicle chassis using a screw structure and a vibration-damping pad, resulting in the vehicle-mounted air pump generating greater vibration and noise.

[0006] To achieve the above object, the present application proposes a method for installing a vehicle-mounted air pump, the installation method comprising the following steps: Providing an adapter plate and a bottom plate, fixing the vehicle-mounted air pump on the adapter plate, and fixing the bottom plate on the vehicle chassis; providing a shock absorber, wherein a target number and a target dynamic stiffness of the shock absorber are selected in a preset manner so that a frequency ratio between a first natural frequency of the vehicle-mounted air pump and a second natural frequency of the shock absorber is greater than a first preset value; The adapter plate is mounted on the base plate via the target number of vibration dampers with the target dynamic stiffness.

[0007] In some embodiments of the present application, the step of selecting the number and dynamic stiffness of the shock absorbers in a preset manner so that the frequency ratio between the first natural frequency of the vehicle-mounted air pump and the second natural frequency of the shock absorber is greater than a first preset value includes: Calculating the second natural frequency of the shock absorber according to the current number, dynamic stiffness and load of the shock absorber; Calculating a first natural frequency of the vehicle-mounted air pump according to a rotation speed and a number of piston cylinders of the vehicle-mounted air pump; Calculating the frequency ratio according to the first natural frequency and the second natural frequency, and determining whether the frequency ratio is greater than a first preset value; If the frequency ratio is greater than the first preset value, the current number and dynamic stiffness of the shock absorbers are selected as the target number and the target dynamic stiffness respectively; If the frequency ratio is equal to or less than the first preset value, the number and / or dynamic stiffness of the shock absorbers are continuously adjusted until the frequency ratio is greater than the first preset value.

[0008] In some embodiments of the present application, the step of continuously adjusting the number or dynamic stiffness of the shock absorbers until the frequency ratio is greater than the first preset value includes: Selecting the current number of shock absorbers as the target number; The vibration absorber with a smaller dynamic stiffness value is gradually replaced until the frequency ratio is greater than the first preset value, and then the dynamic stiffness of the current vibration absorber is selected as the target dynamic stiffness.

[0009] In some embodiments of the present application, the step of continuously adjusting the number or dynamic stiffness of the shock absorbers until the frequency ratio is greater than the first preset value includes: Selecting the current dynamic stiffness of the shock absorber as the target dynamic stiffness; By gradually reducing the number of the vibration absorbers until the frequency ratio is greater than the first preset value, the current number of the vibration absorbers is selected as the target number.

[0010] In some embodiments of the present application, the step of calculating the second natural frequency of the vibration absorber according to the current number, dynamic stiffness and load of the vibration absorber includes: Obtaining specific values ​​of the number, dynamic stiffness and load of the shock absorber; according to The second natural frequency of the vibration absorber is calculated, where —The second natural frequency of the shock absorber, π—pi, k—dynamic stiffness of the shock absorber, m—load of the shock absorber, n—the number of shock absorbers.

[0011] In some embodiments of the present application, the step of obtaining the first natural frequency of the current vehicle-mounted air pump includes: Obtaining specific values ​​of the rotation speed and number of piston cylinders of the vehicle-mounted air pump; according to The first natural frequency of the vehicle-mounted air pump is calculated, wherein: —The first natural frequency of the vehicle air pump, r—the rotation speed of the vehicle air pump, N—the number of piston cylinders of the vehicle air pump.

[0012] In some embodiments of the present application, the step of selecting the target number and target dynamic stiffness of the shock absorber in a preset manner so that the frequency ratio between the first natural frequency of the vehicle-mounted air pump and the second natural frequency of the shock absorber is greater than a first preset value includes: The target number and target dynamic stiffness of the shock absorber are selected in a preset manner so that the frequency ratio between the first natural frequency of the vehicle-mounted air pump and the second natural frequency of the shock absorber is greater than a first preset value and less than a second preset value.

[0013] In some embodiments of the present application, the first preset value is A, 1.6≤A≤1.7, and the second preset value is B, 2.5≤B≤2.6.

[0014] In some embodiments of the present application, after the step of installing the adapter plate on the base plate by the vibration absorber having the target number and the target dynamic stiffness, the following step is also included: Performing a random vibration test on the mounting structure of the vehicle-mounted air pump to detect whether the structure of the vibrator meets the strength requirements; If the structure of the vibrator is not damaged after the random vibration test, it is judged that the structure of the shock absorber meets the preset strength requirement and the installation structure of the vehicle-mounted air pump passes the random vibration test; If the structure of the vibrator is damaged after the random vibration test, it is determined that the structure of the shock absorber does not meet the preset strength requirement, and it is necessary to provide a new shock absorber with the target dynamic stiffness to replace the shock absorber damaged after the random vibration test, and add different degrees of horizontal limiters to the mounting structure of the vehicle-mounted air pump until the mounting structure of the vehicle-mounted air pump passes the random vibration test.

[0015] In some embodiments of the present application, the step of adding different degrees of horizontal limit to the mounting structure of the vehicle-mounted air pump until the mounting structure of the vehicle-mounted air pump passes the random vibration test includes: Providing a surrounding plate, fixing the surrounding plate to the bottom plate, and allowing the surrounding plate to surround the peripheral side of the adapter plate; Providing a buffer pad, and fixing the buffer pad on the peripheral side of the adapter plate, so as to limit the movement of the adapter plate in the horizontal direction through the movable cooperation between the buffer pad and the enclosure plate; The number of the buffer pads is gradually increased until the mounting structure of the vehicle-mounted air pump passes the random vibration test.

[0016] The installation method of the vehicle-mounted air pump provided by the embodiment of the present invention selects the target number and target dynamic stiffness of the shock absorber by a preset method before installing the vehicle-mounted air pump on the vehicle chassis, so that the frequency ratio between the first natural frequency of the vehicle-mounted air pump and the second natural frequency of the shock absorber is greater than the first preset value. In this way, the frequency ratio of the main factor affecting the vibration transmission rate is set so that the target number and target dynamic stiffness of the shock absorber meet the requirements of having a vibration reduction effect. After the adapter plate is installed on the bottom plate through the shock absorber with the target number and target dynamic stiffness, the shock absorber can play a vibration reduction role on the vehicle-mounted air pump. In this way, during the driving process of the vehicle, the shock absorber can absorb the vibration generated by the vehicle-mounted air pump through the adapter plate, thereby playing a role in vibration reduction and noise reduction. At the same time, since the target number and target dynamic stiffness of the shock absorber are selected before the vehicle-mounted air pump is installed on the vehicle chassis, there is no need to repeat the experiment many times to determine the target number and target dynamic stiffness of the shock absorber, saving time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0018] Figure 1 A flowchart of an embodiment of a method for installing a vehicle-mounted air pump of the present application; Figure 2 A flowchart of step 20 of the method for installing a vehicle-mounted air pump of the present application; Figure 3 This is a schematic diagram of the structure of the vehicle-mounted air pump and its installation structure for this application; Figure 4 for Figure 3 Exploded view of the mounting structure.

[0019] Description of the drawings: 100. Mounting structure; 10. Bottom plate; 20. Adapter plate; 30. Shock absorber; 40. Enclosure; 50. Buffer pad; 200. On-vehicle air pump.

[0020] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0022] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] In addition, in this application, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0024] Please refer to Figure 1 , Figure 3 and Figure 4 The embodiment of the present application provides a method for installing a vehicle-mounted air pump, which is applied to the vibration reduction installation of the vehicle-mounted air pump on the vehicle chassis. The installation method includes the following steps: Step S10: providing an adapter plate and a bottom plate, fixing the vehicle-mounted air pump on the adapter plate, and fixing the bottom plate on the vehicle chassis; Step S20: providing shock absorbers, and selecting a target number and a target dynamic stiffness of the shock absorbers in a preset manner so that a frequency ratio between a first natural frequency of the vehicle-mounted air pump and a second natural frequency of the shock absorber is greater than a first preset value; Step S30: installing the adapter plate on the base plate by means of vibration absorbers with a target number and target dynamic stiffness.

[0025] The adapter plate 20 and the vehicle floor 10 are mainly used to provide installation positions for the shock absorber 30 and the vehicle air pump 200. They are usually made of metal, such as carbon steel, stainless steel, aluminum alloy, etc. They can also be made of wood. When the floor 10 is made of metal, it can be fixed to the vehicle floor 10 by welding. In other examples, the floor 10 can be fixed to the vehicle floor 10 by screw thread connection, rivet riveting, etc.

[0026] The shock absorber 30 includes but is not limited to a wire rope shock absorber 30, a metal rubber shock absorber 30, and a rubber shock absorber 30, and its main function is to reduce vibration and impact. It is understandable that based on the different materials of the shock absorber 30 itself, different types of shock absorbers 30 have different dynamic stiffnesses.

[0027] According to the calculation formula of the vibration transmissibility of forced vibration: ,in, — vibration transmissibility, —damping ratio, —Frequency ratio (the frequency ratio between the first natural frequency and the second natural frequency of the shock absorber); When the damping ratio is not considered, the vibration transmissibility of the forced vibration is calculated as follows: , it can be seen that the main parameter affecting the vibration transmissibility is the frequency ratio. Generally speaking, It can achieve a vibration reduction effect. In some examples, the first preset value may be 1.44.

[0028] The installation method of the vehicle-mounted air pump 200 provided in an embodiment of the present invention selects the target number and target dynamic stiffness of the shock absorber 30 by a preset method before installing the vehicle-mounted air pump 200 on the vehicle chassis, so that the frequency ratio between the first natural frequency of the vehicle-mounted air pump 200 and the second natural frequency of the shock absorber 30 is greater than the first preset value. In this way, the frequency ratio of the main factor affecting the vibration transmissibility is set, so that the target number and target dynamic stiffness of the shock absorber 30 meet the requirements of having a vibration reduction effect. After the adapter plate 20 is installed on the base plate 10 by the shock absorber 30 with the target number and target dynamic stiffness, the shock absorber 30 can play a vibration reduction role on the vehicle-mounted air pump 200. In this way, when the vehicle is driving, the shock absorber 30 can absorb the vibration generated by the vehicle-mounted air pump 200 through the adapter plate 20, thereby playing a role in vibration reduction and noise reduction. At the same time, since the target number and target dynamic stiffness of the shock absorbers 30 are selected before the vehicle air pump 200 is installed on the vehicle chassis, there is no need to repeat the experiment many times to determine the target number and target dynamic stiffness of the shock absorbers 30, thus saving time.

[0029] In some embodiments of the present invention, please refer to Figure 1 and Figure 2 , step S20 comprises: Step S21: Calculate the second natural frequency of the shock absorber according to the current number, dynamic stiffness and load of the shock absorber.

[0030] Step S22: Calculate the first natural frequency of the vehicle-borne air pump according to the rotation speed and the number of piston cylinders of the vehicle-borne air pump.

[0031] Step S23: Calculating a frequency ratio according to the first natural frequency and the second natural frequency, and determining whether the frequency ratio is greater than a first preset value.

[0032] Step S24: If the frequency ratio is greater than the first preset value, the current number and dynamic stiffness of the shock absorbers are selected as the target number and target dynamic stiffness respectively.

[0033] Step S25: If the frequency ratio is equal to or less than the first preset value, the number and / or dynamic stiffness of the shock absorbers are continuously adjusted until the frequency ratio is greater than the first preset value.

[0034] The dynamic stiffness of the shock absorber 30 refers to the ratio of the change in pressure (or tensile force) to which the shock absorber 30 is subjected to to the change in its displacement within a certain displacement range and at a certain frequency. Dynamic stiffness is an important parameter of the shock absorber 30. Usually, the dynamic stiffness of shock absorbers 30 of the same model is the same. For this, the dynamic stiffness parameter of the shock absorber 30 can be obtained by obtaining the model of the shock absorber 30. The load of the shock absorber 30 refers to the weight carried by the shock absorber 30. In the present application, the weight carried by the shock absorber 30 is the weight of the vehicle-mounted air pump 200 and the adapter plate 20. For this, the load parameter of the shock absorber 30 can be obtained by weighing the vehicle-mounted air pump 200 and the adapter plate 20.

[0035] It is understandable that the rotation speed and the number of piston cylinders of the vehicle-mounted air pump 200 have been set before leaving the factory. Therefore, the rotation speed and the number of piston cylinders of the vehicle-mounted air pump 200 can be directly obtained through the model of the vehicle-mounted air pump 200.

[0036] In this way, the frequency ratio between the first natural frequency and the second natural frequency can be quickly calculated through the above-mentioned method steps, so that when the frequency ratio is equal to or less than the first preset value, the number and / or dynamic stiffness of the shock absorber 30 can be quickly adjusted, thereby quickly making the frequency ratio greater than the first preset value to improve efficiency.

[0037] In some embodiments of the present invention, step S25 includes: The current number of shock absorbers is selected as the target number.

[0038] By gradually replacing the shock absorbers with smaller stiffness values ​​until the frequency ratio is greater than the first preset value, the dynamic stiffness of the current shock absorber is selected as the target dynamic stiffness.

[0039] In this way, the dynamic stiffness of the shock absorber 30 can be quickly adjusted through the above method steps to adjust the second natural frequency of the shock absorber 30.

[0040] In some embodiments of the present invention, step S25 includes: The dynamic stiffness of the current shock absorber is selected as the target dynamic stiffness.

[0041] By gradually reducing the number of shock absorbers until the frequency ratio is greater than a first preset value, the current number of shock absorbers is selected as the target number.

[0042] In this way, the number of vibration absorbers 30 can be quickly adjusted through the above method steps to adjust the second natural frequency of the vibration absorber 30.

[0043] In some embodiments of the present invention, step S25 includes: First, replace the shock absorber with a smaller dynamic stiffness value, and determine the dynamic stiffness value as the target dynamic stiffness.

[0044] According to the number and dynamic stiffness of the current vibration absorbers, the second natural frequency of the vibration absorbers is calculated.

[0045] A frequency ratio is calculated according to the first natural frequency and the second natural frequency, and it is determined whether the frequency ratio is greater than a first preset value.

[0046] If the frequency ratio is greater than the first preset value, the current number of shock absorbers is set to the target number.

[0047] If the frequency ratio is equal to or less than the first preset value, the number of shock absorbers is gradually reduced until the frequency ratio is greater than the first preset value.

[0048] In this way, the number and dynamic stiffness of the vibration absorbers 30 can be quickly adjusted through the above method steps to adjust the second natural frequency of the vibration absorbers 30.

[0049] In some embodiments of the present invention, step S25 includes: First reduce the number of shock absorbers and determine the dynamic stiffness value as the target dynamic stiffness.

[0050] Calculate the second natural frequency of the shock absorber according to the number and dynamic stiffness of the current shock absorber; A frequency ratio is calculated according to the first natural frequency and the second natural frequency, and it is determined whether the frequency ratio is greater than a first preset value.

[0051] If the frequency ratio is greater than the first preset value, the current dynamic stiffness of the shock absorber is selected as the target dynamic stiffness.

[0052] If the frequency ratio is equal to or less than the first preset value, the dynamic stiffness of the current shock absorber is selected as the target dynamic stiffness by gradually replacing shock absorbers with smaller dynamic stiffness values ​​until the frequency ratio is greater than the first preset value.

[0053] In this way, the number and dynamic stiffness of the vibration absorbers 30 can be quickly adjusted through the above method steps to adjust the second natural frequency of the vibration absorbers 30.

[0054] It should be emphasized that, in order to ensure the stability of the vehicle-mounted air pump 200 , the number of shock absorbers 30 is usually not less than three.

[0055] In some embodiments of the present invention, step S21 includes: Step S211: Obtain the specific values ​​of the number, dynamic stiffness and load of the shock absorbers.

[0056] Step S212: According to Calculate the second natural frequency of the shock absorber, where —The second natural frequency of the shock absorber, π—pi, k—dynamic stiffness of the shock absorber, m—load of the shock absorber, n—the number of shock absorbers.

[0057] In this way, the second natural frequency of the vibration absorber 30 can be accurately calculated through the above method steps.

[0058] In some embodiments of the present invention, step S22 includes: Step S221: Obtain specific values ​​of the rotation speed and number of piston cylinders of the vehicle-mounted air pump.

[0059] Step S222: According to Calculate the first natural frequency of the vehicle air pump, where —The first natural frequency of the vehicle air pump, r—the rotation speed of the vehicle air pump, N—the number of piston cylinders of the vehicle air pump.

[0060] In this way, the first natural frequency of the vehicle-mounted air pump 200 can be accurately calculated through the above method steps.

[0061] In some embodiments of the present invention, the step of selecting a target number and a target dynamic stiffness of the shock absorbers by a preset method so that the frequency ratio between the first natural frequency of the vehicle-mounted air pump and the second natural frequency of the shock absorber is greater than a first preset value includes: The target number and target dynamic stiffness of the shock absorbers are selected in a preset manner so that the frequency ratio between the first natural frequency of the vehicle-mounted air pump and the second natural frequency of the shock absorber is greater than a first preset value and less than a second preset value.

[0062] In this way, it can be ensured that the shock absorber 30 still has good supporting force, thereby ensuring the stability of the vehicle-mounted air pump 200.

[0063] In some examples, the first preset value is A, 1.6≤A≤1.7, and the second preset value is B, 2.5≤B≤2.6. Preferably, the first preset value is 1.65, and the second preset value is 2.6.

[0064] It should be emphasized that, after the setting of the above method, it can be determined that the shock absorber 30 has a vibration reduction effect on the vehicle-mounted air pump 200, but in order to improve the riding experience of passengers in the vehicle, it is necessary to preset a preset vibration reduction effect and compare it with the actual effect.

[0065] In some embodiments of the present invention, the installation method further comprises the following steps: The mounting structure of the vehicle-mounted air pump is subjected to an acceleration test to detect the vibration reduction effect of the shock absorber.

[0066] If the vibration reduction effect is greater than the preset vibration reduction effect, the acceleration test is passed.

[0067] If the vibration reduction effect is equal to or less than the preset vibration reduction effect, the acceleration test is passed by continuously adjusting the number and / or dynamic stiffness of the vibration absorbers until the vibration reduction effect ratio is greater than the preset vibration reduction effect.

[0068] In this way, the standardization of the installation method of the vehicle-mounted air pump 200 can be improved through the above-mentioned method steps.

[0069] Considering that after the vehicle air pump 200 is installed on the vehicle chassis through the above-mentioned installation method, the modal frequency of the vehicle system is lower, which improves the comfort of users riding in the vehicle, but this may reduce the reliability of the vehicle air pump installed on the vehicle chassis.

[0070] In some embodiments of the present invention, after the step of mounting the adapter plate on the base plate by using the shock absorbers with the target number and target dynamic stiffness, the following steps are also included: A random vibration test is performed on the mounting structure 100 of the vehicle-mounted air pump 200 to detect whether the structure of the vibrator meets the strength requirements.

[0071] If the structure of the vibrator is not damaged after the random vibration test, it is determined that the structure of the shock absorber 30 meets the preset strength requirement, and the mounting structure 100 of the vehicle-mounted air pump 200 passes the random vibration test.

[0072] If the structure of the vibrator is damaged after the random vibration test, it is determined that the structure of the shock absorber 30 does not meet the preset strength requirement, and a shock absorber 30 with a target dynamic stiffness must be provided again to replace the shock absorber 30 that is damaged after the random vibration test, and different degrees of horizontal limiters must be added to the mounting structure 100 of the vehicle-mounted air pump 200 until the mounting structure 100 of the vehicle-mounted air pump 200 passes the random vibration test.

[0073] In this way, through the above method steps, the vibration reduction effect of the shock absorber 30 on the vehicle air pump can be improved, and the reliability of the vehicle air pump 200 installed on the vehicle chassis can be improved.

[0074] In some embodiments of the present invention, please refer to Figure 3 and Figure 4 The steps of adding different degrees of horizontal limit to the mounting structure of the vehicle air pump until the mounting structure of the vehicle air pump passes the random vibration test include: A surrounding plate 40 is provided, fixedly connected to the base plate 10 , and arranged around the peripheral side of the adapter plate 20 .

[0075] A buffer pad 50 is provided and fixedly mounted on the peripheral side of the adapter plate 20 so as to limit the movement of the adapter plate 20 in the horizontal direction through the movable cooperation between the buffer pad 50 and the surrounding plate 40 .

[0076] The number of the buffer pads 50 is gradually increased until the mounting structure 100 of the vehicle-mounted air pump 200 passes the random vibration test.

[0077] In this way, the reliability of installing the vehicle-mounted air pump on the vehicle chassis can be further improved through the above-mentioned method steps.

[0078] In addition, in the above-mentioned method for installing the vehicle-mounted air pump, a second shock absorber may be provided, and the vehicle-mounted air pump is installed on the adapter plate through the second shock absorber.

[0079] The above description is only an optional embodiment of the present application, and does not limit the patent scope of the present application. All equivalent structural transformations made by using the contents of the present application specification and drawings under the inventive concept of the present application, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A method for installing a vehicle-mounted air pump, characterized in that: The installation method comprises the following steps: Providing an adapter plate and a bottom plate, fixing the vehicle-mounted air pump on the adapter plate, and fixing the bottom plate on the vehicle chassis; providing a shock absorber, wherein a target number and a target dynamic stiffness of the shock absorber are selected in a preset manner so that a frequency ratio between a first natural frequency of the vehicle-mounted air pump and a second natural frequency of the shock absorber is greater than a first preset value; The adapter plate is mounted on the base plate via the target number of vibration dampers with the target dynamic stiffness.

2. The installation method according to claim 1, characterized in that: The step of selecting the number and dynamic stiffness of the shock absorbers in a preset manner so that the frequency ratio between the first natural frequency of the vehicle-mounted air pump and the second natural frequency of the shock absorber is greater than a first preset value comprises: Calculating the second natural frequency of the shock absorber according to the current number, dynamic stiffness and load of the shock absorber; Calculating a first natural frequency of the vehicle-mounted air pump according to a rotation speed and a number of piston cylinders of the vehicle-mounted air pump; Calculating the frequency ratio according to the first natural frequency and the second natural frequency, and determining whether the frequency ratio is greater than a first preset value; If the frequency ratio is greater than the first preset value, the current number and dynamic stiffness of the shock absorbers are selected as the target number and the target dynamic stiffness respectively; If the frequency ratio is equal to or less than the first preset value, the number and / or dynamic stiffness of the shock absorbers are continuously adjusted until the frequency ratio is greater than the first preset value.

3. The installation method according to claim 2, characterized in that: The step of continuously adjusting the number or dynamic stiffness of the shock absorbers until the frequency ratio is greater than the first preset value comprises: Selecting the current number of shock absorbers as the target number; The vibration absorber with a smaller dynamic stiffness value is gradually replaced until the frequency ratio is greater than the first preset value, and then the dynamic stiffness of the current vibration absorber is selected as the target dynamic stiffness.

4. The installation method according to claim 2, characterized in that: The step of continuously adjusting the number or dynamic stiffness of the shock absorbers until the frequency ratio is greater than the first preset value comprises: Selecting the current dynamic stiffness of the shock absorber as the target dynamic stiffness; By gradually reducing the number of the vibration absorbers until the frequency ratio is greater than the first preset value, the current number of the vibration absorbers is selected as the target number.

5. The installation method according to claim 2, characterized in that: The step of calculating the second natural frequency of the shock absorber according to the current number, dynamic stiffness and load of the shock absorber comprises: Obtaining specific values ​​of the number, dynamic stiffness and load of the shock absorber; according to The second natural frequency of the vibration absorber is calculated, where —The second natural frequency of the shock absorber, π—pi, k—dynamic stiffness of the shock absorber, m—load of the shock absorber, n—the number of shock absorbers.

6. The installation method according to claim 2, characterized in that: The step of obtaining the first natural frequency of the current vehicle-mounted air pump comprises: Obtaining specific values ​​of the rotation speed and number of piston cylinders of the vehicle-mounted air pump; according to The first natural frequency of the vehicle-mounted air pump is calculated, wherein: —The first natural frequency of the vehicle air pump, r—the rotation speed of the vehicle air pump, N—the number of piston cylinders of the vehicle air pump.

7. The installation method according to claim 1, characterized in that: The step of selecting the target number and target dynamic stiffness of the shock absorbers in a preset manner so that the frequency ratio between the first natural frequency of the vehicle-mounted air pump and the second natural frequency of the shock absorber is greater than a first preset value comprises: The target number and target dynamic stiffness of the shock absorber are selected in a preset manner so that the frequency ratio between the first natural frequency of the vehicle-mounted air pump and the second natural frequency of the shock absorber is greater than a first preset value and less than a second preset value.

8. The installation method according to claim 7, characterized in that: The first preset value is A, 1.6≤A≤1.7, and the second preset value is B, 2.5≤B≤2.

6.

9. The installation method according to claim 8, characterized in that: After the step of installing the adapter plate on the base plate by the shock absorbers having the target number and the target dynamic stiffness, the following steps are also included: Performing a random vibration test on the mounting structure of the vehicle-mounted air pump to detect whether the structure of the vibrator meets the strength requirements; If the structure of the vibrator is not damaged after the random vibration test, it is judged that the structure of the shock absorber meets the preset strength requirement and the installation structure of the vehicle-mounted air pump passes the random vibration test; If the structure of the vibrator is damaged after the random vibration test, it is determined that the structure of the shock absorber does not meet the preset strength requirement, and it is necessary to provide a new shock absorber with the target dynamic stiffness to replace the shock absorber damaged after the random vibration test, and add different degrees of horizontal limiters to the mounting structure of the vehicle-mounted air pump until the mounting structure of the vehicle-mounted air pump passes the random vibration test.

10. The installation method according to claim 9, characterized in that: The step of adding different degrees of horizontal limit to the mounting structure of the vehicle-mounted air pump until the mounting structure of the vehicle-mounted air pump passes the random vibration test comprises: Providing a surrounding plate, fixing the surrounding plate to the bottom plate, and allowing the surrounding plate to surround the peripheral side of the adapter plate; Providing a buffer pad, and fixing the buffer pad on the peripheral side of the adapter plate, so as to limit the movement of the adapter plate in the horizontal direction through the movable cooperation between the buffer pad and the enclosure plate; The number of the buffer pads is gradually increased until the mounting structure of the vehicle-mounted air pump passes the random vibration test.

Images