Direct-driven vibration reduction test bench and test method

Abstract

The invention discloses a direct-drive vibration reduction test bench and a test method, and relates to the technical field of automobile part test. The direct-drive type vibration reduction test bench comprises a rack body, a direct-drive mechanism and a pressure applying assembly. The frame body is provided with a test area and a power area at an interval along a first direction; the direct drive mechanism is located in the power area, the drive end of the direct drive mechanism is provided with a drive push rod extending to the test area in the first direction, and the drive push rod is used for being connected with a tested piece; the pressure applying assembly is located in the testing area and is provided with a pressure applying table and a bearing seat which correspond to the driving push rod, and the pressure applying table is located on the side, facing the driving push rod, of the bearing seat in the first direction and used for being connected with the tested piece. By adopting the technology provided by the invention, the problem that the test speed is easy to reduce when the test bench performs large-stroke motion can be effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile component testing, and in particular to a direct-drive vibration reduction test bench and a testing method. Background Art

[0002] In the automotive field, dampers are generally used in the vibration reduction structure of tires. Their main function is to reduce vibration and impact to improve the stability of the automotive system and user comfort. In order to ensure its performance, safety and quality in actual applications, a test bench is generally required to help evaluate the dynamic response of the damper at different frequencies and amplitudes (simulating real working conditions).

[0003] However, traditional test benches mainly use hydraulic drive systems as power sources. Since the flow rate of the hydraulic oil and the piston movement speed of the hydraulic cylinder are limited by the power of the hydraulic pump and the system resistance, when the test stroke is relatively large, the use of the hydraulic drive system requires more hydraulic oil to drive the piston movement, resulting in problems such as reduced test speed and reduced test accuracy.

[0004] Based on this, a Chinese invention patent document (CN105651530A) discloses a vibration damper bench test device and method. The test bench in the Chinese invention patent document (CN105651530A) uses a servo motor as a driving source instead of a hydraulic system. However, the servo motor usually requires the addition of mechanical devices such as a reduction gearbox or a belt drive, and achieves precise position, speed and torque control through feedback control, which results in a high cost and occupies a large space, and does not show better test results in vibration damping tests. Summary of the invention

[0005] The present invention provides a direct-drive vibration reduction test bench and a test method, so as to solve the problem in the prior art that when the test bench performs a large-stroke movement, the test speed is easily reduced.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is to provide a direct-drive vibration reduction test bench, which includes: a frame, a direct-drive mechanism and a pressure component.

[0007] The frame is provided with a test area and a power area at intervals along a first direction; the direct drive mechanism is located in the power area, wherein the driving end of the direct drive mechanism is provided with a driving push rod extending along the first direction to the test area, and the driving push rod is used to connect with the test piece; the pressure assembly is located in the test area, and is provided with a pressure platform and a load-bearing seat corresponding to the driving push rod, wherein the pressure platform is located on the side of the load-bearing seat facing the driving push rod along the first direction, and is used to connect with the test piece.

[0008] The technical solution provided by the present invention has the following beneficial effects compared with the prior art: By dividing the frame into a test area and a power area, the test process of the test piece (damping shock absorber) is functionally divided. When testing the test piece, the staff only needs to open the test area to install the test piece, without making too many adjustments to the devices in the power area, thereby reducing the mutual interference between the devices in the test area and the power area.

[0009] Among them, a driving push rod is set at the driving end of the direct drive mechanism and is directly connected to one end of the test piece, and the other end of the test piece is connected to the pressure platform of the pressure component to perform the test operation. Specifically, the direct drive mechanism applies force to the test piece through the driving push rod to simulate the external road conditions (such as tension, compression, etc.) of the test piece under actual working conditions, and the pressure component simulates the load state of the test piece under actual working conditions. Compared with the traditional hydraulic drive method which is limited by the characteristics of hydraulic oil (such as viscosity, temperature, etc.), the direct drive mechanism is electrically driven, which can be more adaptable to high-frequency working conditions and respond quickly, and can simulate more complex road conditions for the test piece.

[0010] In addition, the direct drive mechanism has no stroke limit, avoiding the interference of stroke size on test speed. The direct drive design of the drive push rod can directly convert the electrical energy of the direct drive mechanism into the mechanical kinetic energy of the drive push rod, which reduces the intermediate transmission link compared to the servo motor (the current servo motor needs to be connected to the load through a transmission mechanism such as a gear box and belt), and can achieve higher positioning accuracy and system rigidity, and reduce the space occupied by the intermediate transmission mechanism, making the overall test bench structure more compact and occupying less space. The advantages of the direct drive mechanism's rapid response and high-precision control enable the direct drive motor to respond more quickly to start, stop and speed change commands in vibration reduction tests, meeting the testing needs of more simulated working conditions.

[0011] In some embodiments, the direct-drive vibration reduction test bench further includes a guide assembly having a plurality of guide columns penetrating the load-bearing seat along the first direction, so that the load-bearing seat can be suspended in the test area.

[0012] In current test benches, the upper test surface with multiple counterweights is usually fixed and rigidly connected to the frame of the entire test bench, which makes it susceptible to external vibrations and affects the test accuracy of the DUT. Counterweights are essentially used to simulate vehicle loads. Although their fixed design allows the load of the DUT to be adjustable, there is a certain difference from actual working conditions.

[0013] Therefore, by adopting the above technical solution, the floating setting of the load-bearing seat can effectively isolate the interference of external vibration, ensure the test accuracy of the test piece, and more accurately simulate the actual working condition of the test piece.

[0014] Furthermore, the load-bearing seat is also provided with a plurality of fixing sleeves, wherein the guide column passes through the fixing sleeves. By adopting the above technical solution, the load-bearing seat is installed through the fixing sleeves, so that the staff can adjust whether the current load-bearing seat is in a fixed state or a floating state, so that the load-bearing seat can adjust the actual installation position and test direction according to different test requirements.

[0015] In some embodiments, the frame is further provided with an upper end cover, wherein the guide assembly includes four guide columns, and the four guide columns are circumferentially arranged at four corners of the upper end cover.

[0016] By adopting the above technical solution, the current conventional test bench has only two guide columns. In order to ensure the stability of the load-bearing seat, for example, when multiple weights are installed on the load-bearing seat, increasing the number of guide columns to four can effectively improve the stability of the load-bearing seat.

[0017] In some embodiments, the power zone is further provided with a cooling system, and the cooling system includes a plurality of cooling channels circumferentially arranged on the direct drive mechanism, wherein a coolant can flow through the cooling channels. With the above technical solution, the coolant flowing through the plurality of cooling channels takes away the heat generated during the operation of the direct drive mechanism, thereby reducing the ambient temperature of the direct drive mechanism, increasing the service life of the direct drive motor, and allowing it to exhibit a greater thrust effect under the same volume.

[0018] In some embodiments, an elastic component is further provided at the bottom of the power zone along the first direction, one end of the elastic component is connected to the bottom of the frame, and the other end is connected to the direct drive mechanism.

[0019] By adopting the above technical solution, an elastic component is provided at the bottom of the direct-drive mechanism to offset the load of the moving part (ie, the mover) of the direct-drive mechanism, thereby improving the output efficiency and dynamic performance of the direct-drive mechanism.

[0020] In some embodiments, the pressure assembly further includes a plurality of weights, which are located along the first direction on a side of the load-bearing seat away from the pressure platform, wherein the upper end cover is provided with a hollow groove corresponding to the load-bearing seat.

[0021] By adopting the above technical solution, the hollow groove of the upper end cover can facilitate the staff to install the weights located in the test area from the upper end of the test bench, so as to improve the operational safety of the staff when adjusting the test parameters.

[0022] In some embodiments, the load-bearing seat is further provided with an acceleration sensor and / or the weight is further provided with the acceleration sensor, and the acceleration sensor can monitor the dynamic response of the tested object during the test in real time. The acceleration sensor can reflect the vibration suppression effect of the tested object, that is, the vibration reduction performance of the tested object, by accurately capturing the change of vibration acceleration.

[0023] In some embodiments, the test area is further provided with one or more grating rulers extending along the first direction, wherein the grating rulers are parallel to the push rod.

[0024] By adopting the above technical solution, when testing the workpiece, since the driving push rod of the direct-drive mechanism continuously performs up and down reciprocating motion, the grating ruler can effectively detect the current position of the workpiece and feed back to the driver of the direct-drive mechanism, thereby realizing precise control of the test position.

[0025] In some embodiments, the present application also provides a testing method, which is applied to the above-mentioned direct-drive vibration reduction test bench, including: obtaining test parameters and adjusting the driving parameters of the direct-drive mechanism according to the test parameters; obtaining the weight of the weight of the pressure component corresponding to the test parameters and the relative position of the pressure component in the guide component; starting the direct-drive mechanism according to the test parameters, wherein the direct-drive mechanism and the pressure component are respectively connected to the test piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work, among which: Figure 1 It is a front view of the internal structure of an embodiment of a direct-drive vibration reduction test bench provided by the present invention; Figure 2 It is a three-dimensional diagram of the internal structure of an embodiment of a direct-drive vibration reduction test bench provided by the present invention; Figure 3 It is a stereoscopic diagram of the external structure of an embodiment of a direct-drive vibration reduction test bench provided by the present invention; Figure 4 It is a front view of the connection between a guide assembly and a load-bearing seat of an embodiment of a direct-drive vibration reduction test bench provided by the present invention; Figure 5 It is a schematic diagram of the connection between a guide assembly and a load-bearing seat of an embodiment of a direct-drive vibration reduction test bench provided by the present invention; Figure 6is a top view of an embodiment of a direct-drive vibration reduction test bench provided by the present invention; Figure 7 It is a partial structural stereogram of an embodiment of a direct-drive vibration reduction test bench provided by the present invention; Figure 8 The figure is a front view of the internal structure of an embodiment of a power zone of a direct-drive vibration reduction test bench provided by the present invention.

[0027] In the figure: 10. Frame; 11. Test area; 110. Observation window; 12. Power area; 120. Fan; 13. Upper cover; 130. Hollow groove; 14. Bottom plate; 20. Direct drive mechanism; 21. Drive push rod; 30. Pressure assembly; 31. Pressure platform; 32. Load-bearing seat; 320. Weight; 321. Fixed sleeve; 40. Guide assembly; 41. Guide column; 50. Cooling system; 51. Cooling channel; 52. Cooling water inlet; 53. Cooling water outlet; 60. Elastic assembly; 70. Grating scale. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] See also Figures 1 to 3 As shown, Figure 1 A front view of the internal structure of an embodiment of a direct-drive vibration reduction test bench provided by the present application is shown; Figure 2 A three-dimensional diagram of the internal structure of an embodiment of a direct-drive vibration reduction test bench provided by the present application is shown; Figure 3 A stereoscopic diagram of the external structure of an embodiment of a direct-drive vibration reduction test bench provided by the present application is shown.

[0030] In the following implementation scheme, combined with Figures 1 to 3 As shown, the direct-drive vibration reduction test bench comprises: a frame 10, a direct-drive mechanism 20 and a pressure assembly 30. The frame 10 is provided with a test area 11 and a power area 12 at intervals along the first direction; the direct-drive mechanism 20 is located in the power area 12, wherein the driving end of the direct-drive mechanism 20 is provided with a driving push rod 21 extending along the first direction to the test area 11, and the driving push rod 21 is used to connect with the test piece; the pressure assembly 30 is located in the test area 11, and is provided with a pressure platform 31 and a bearing seat 32 corresponding to the driving push rod 21, wherein the pressure platform 31 is located along the first direction on the side of the bearing seat 32 facing the driving push rod 21, and is used to connect with the test piece.

[0031] In the embodiment of the present application, the test process of the device under test is functionally partitioned by dividing the frame 10 into the test area 11 and the power area 12. When testing the device under test, the staff only needs to open the test area 11 to install the device under test, without making too many adjustments to the devices in the power area 12, thereby reducing the mutual interference between the devices in the test area 11 and the power area 12. Figure 3 As shown, a partition is provided between the test area 11 and the power area 12, and the guide column 41 described below passes through the partition and is fixed by the partition.

[0032] The test area 11 is also provided with a cabinet door fixed by hinges, so that the staff has a larger space (ie, the test area 11) to install the test piece.

[0033] In some application scenarios, the test piece may be an active damper or a passive damper. The active damper uses an electronic, hydraulic or pneumatic control system to actively sense and respond to the vehicle's suspension movement; the passive damper relies on its internal mechanical structure and material properties to absorb and damp the vibration and impact of the vehicle.

[0034] Among them, a driving push rod 21 is set at the driving end of the direct drive mechanism 20 to be directly connected to one end of the test piece and the other end is connected to the pressure platform 31 of the pressure component 30 to perform the test operation. In some application scenarios, the driving push rod 21 applies force to the test piece to simulate the road conditions (tension, compression or rotation, etc.) that the test piece (active shock absorber or passive shock absorber) may encounter under actual working conditions, and the pressure component 30 serves as the load of the test piece.

[0035] The traditional hydraulic drive method is limited by the characteristics of hydraulic oil (such as viscosity, temperature, etc.), and there is a delay during the test process, which is easy to affect the vibration reduction effect evaluation of the tested part. The above-mentioned direct drive mechanism 20 is electrically driven, and the electrical energy is directly converted into the mechanical kinetic energy of the drive push rod 21, so that it can respond quickly and is more suitable for high-frequency working conditions. Compared with the servo drive system with an intermediate transmission mechanism, under the same torque requirement, the servo motor needs to have a larger output and a higher use cost.

[0036] Exemplarily, the direct-drive mechanism 20 may be a linear motor, which has the advantages of fast response and high-precision control. It can respond more quickly to start, stop and speed change instructions in vibration reduction tests, meet the testing requirements of more simulated working conditions of the test piece, and is more suitable for the power source in the above-mentioned test bench.

[0037] In some embodiments, in combination Figure 3As shown, the test area 11 also has a plurality of observation windows 110 arranged in an array, so that when the device under test is in a test state, the staff can observe the test state of the internal device under test through the observation window 110 to make timely adjustments.

[0038] Combination Figures 4 to 5 As shown, Figure 4 A front view showing a connection between a guide assembly 40 and a load-bearing seat 32 of a direct-drive vibration reduction test bench provided by the present application; Figure 5 A schematic diagram of the connection between a guide assembly 40 and a load-bearing seat 32 of a direct-drive vibration reduction test bench provided by the present application is shown.

[0039] In some embodiments, the direct-drive vibration reduction test bench also includes a guide assembly 40, which has a plurality of guide columns 41 that penetrate the load-bearing seat 32 along a first direction, so that the load-bearing seat 32 can be suspended in the test area 11, and reduces the deflection phenomenon that may be caused by a single or two guide columns 41, further optimizing the test accuracy and reliability of the load-bearing seat 32.

[0040] In current test benches, the upper test surface with multiple counterweights (such as weights 320) is usually fixed and rigidly connected to the frame 10 of the entire test bench, which makes it susceptible to interference from external vibrations. Therefore, in the embodiment of the present application, the weight bearing seat 32 is connected to the guide column 41, and the weights 320 on the weight bearing seat 32 are relatively independent from the guide column 41. Figure 4 As shown, the weight 320 is fixed to the upper end of the load-bearing seat 32, and a plurality of guide pillars 41 respectively penetrate the load-bearing seat 32, thereby realizing the floating setting of the load-bearing seat 32, so that it can effectively isolate the interference of external vibration, so as to more accurately simulate the dynamic working conditions and ensure the test accuracy of the test piece. Among them, the load-bearing seat 32 is suspended in the test area 11, which can improve the response speed to the vibration of the direct drive mechanism 20 and reduce the interference of external vibration. In some application scenarios, the load-bearing seat 32 and the weight 320 are used as the load of the test piece to simulate the automobile load of the test piece under actual working conditions. The staff can adjust the load-bearing seat 32 to a floating state or a fixed state according to the actual test requirements.

[0041] For example, in combination Figure 5 As shown, the load-bearing seat 32 is also provided with a plurality of fixing sleeves 321, wherein the guide column 41 passes through the fixing sleeves 321, so as to install the load-bearing seat 32 through the fixing sleeves 321, so that the current load-bearing seat 32 can be adjusted to be in a fixed state or a floating state according to the actual application scenario, so that the load-bearing seat 32 can adapt to different test requirements, and the actual installation position and test direction can be adjusted. For example, when testing the vertical suspension pressure, the load-bearing seat 32 is in a fixed state.

[0042] See also Figure 6 As shown, Figure 6 A top view of an embodiment of a direct-drive vibration reduction test bench provided by the present application is shown.

[0043] In some embodiments, the frame 10 is further provided with an upper end cover 13 , wherein the guide assembly 40 includes four guide pillars 41 , and the four guide pillars 41 are circumferentially arranged at four corners of the upper end cover 13 .

[0044] In the embodiment of the present application, compared with the current conventional test bench which has only two guide pillars 41, in order to ensure the stability of the load-bearing seat 32, for example, when multiple weights 320 are installed on the load-bearing seat 32, increasing the guide pillars 41 to four can effectively improve the stability of the load-bearing seat 32.

[0045] In some embodiments, the pressure assembly 30 further includes a plurality of weights 320 , which are located along the first direction on a side of the load-bearing seat 32 away from the pressure platform 31 , wherein the upper end cover 13 is provided with a hollow groove 130 corresponding to the load-bearing seat 32 .

[0046] In the embodiment of the present application, the hollow groove 130 of the upper end cover 13 can facilitate the staff to install the weight 320 located in the test area 11 from the upper end of the test bench, so as to improve the operational safety of the staff when adjusting the test parameters.

[0047] In some embodiments, the load-bearing seat 32 is also provided with an acceleration sensor, or the weight 320 is provided with an acceleration sensor, or both the load-bearing seat 32 and the Mafa are provided with acceleration sensors. Among them, the acceleration sensor can monitor the dynamic response of the tested object in real time during the test process, and can reflect the vibration suppression effect of the tested object, that is, the vibration reduction performance of the tested object, by accurately capturing the change of vibration acceleration.

[0048] In some embodiments, the test area 11 is further provided with one or more grating rulers 70 extending along the first direction, wherein the grating rulers 70 are parallel to the push rod.

[0049] In the embodiment of the present application, the grating ruler 70 (i.e., the grating ruler displacement sensor) is a measurement feedback device that works using the optical principle of the grating. It can achieve accurate measurement of displacement through optical principles, such as accurate measurement of the load-bearing seat, and transmit the measurement data to the controller in real time.

[0050] When testing the test piece, since the driving push rod 21 of the direct drive mechanism 20 continuously performs up and down reciprocating motion, the grating ruler 70 can effectively detect the current position of the test piece and feed back to the driver of the direct drive mechanism 20, thereby realizing precise control of the test position.

[0051] For example, in combination Figure 6As shown, the grating ruler 70 passes through the upper end cover 13 along the first direction, and two grating rulers 70 parallel to each other are provided to ensure the accuracy of the position detection of the load-bearing seat 32.

[0052] See also Figures 7 and 8 As shown, Figure 7 A partial structural stereogram of an embodiment of a direct-drive vibration reduction test bench provided by the present application is shown; Figure 8 A front view of the internal structure of a power zone 12 of an embodiment of a direct-drive vibration reduction test bench provided by the present application is shown.

[0053] In some embodiments, the power zone 12 is further provided with a cooling system 50 , and the cooling system 50 includes a plurality of cooling channels 51 circumferentially arranged on the direct drive mechanism 20 , wherein a coolant can flow through the cooling channels 51 .

[0054] In the embodiment of the present application, the coolant flowing through the plurality of cooling channels 51 takes away the heat generated during the operation of the direct drive mechanism 20, thereby reducing the ambient temperature of the direct drive mechanism 20, increasing the service life of the direct drive motor, and allowing it to exhibit a greater thrust effect under the same volume. Exemplarily, the coolant may be cooling water, which enters the cooling channel 51 through the cooling water inlet and flows through the cooling channel 51 to the cooling water outlet.

[0055] The cooling channel 51 is disposed around the direct drive mechanism 20. In some application scenarios, the power area 12 is further provided with a plurality of fans 120 and a plurality of air holes to ensure air circulation in the power area 12.

[0056] In some embodiments, in combination Figure 8 As shown, an elastic component 60 is further disposed at the bottom of the power area 12 along the first direction. One end of the elastic component 60 is connected to the bottom of the frame 10 , and the other end is connected to the direct drive mechanism 20 .

[0057] In the embodiment of the present application, an elastic component 60 is provided at the bottom of the direct drive mechanism 20 to offset the load of the moving part (i.e., the mover) of the direct drive mechanism 20, thereby improving the output efficiency and dynamic performance of the direct drive mechanism 20. Figure 8 As shown, the elastic component 60 can be a plurality of springs, and the springs are used to offset the motion load of the direct drive mechanism 20. For example, when the linear motor is working, it will have a reaction force along the guide rail toward the spring side, and the elastic force of the spring can effectively offset the reaction force. Among them, the application does not limit the number and elastic coefficient of the springs, for example, four, six or eight springs can be set.

[0058] In some embodiments, the present application also provides a testing method, which is applied to the above-mentioned direct-drive vibration reduction test bench, including: obtaining test parameters and adjusting the driving parameters of the direct-drive mechanism 20 according to the test parameters; obtaining the weight 320 of the pressure assembly 30 corresponding to the test parameters and the relative position of the pressure assembly 30 located in the guide assembly 40; starting the direct-drive mechanism 20 according to the test parameters, wherein the direct-drive mechanism 20 and the pressure assembly 30 are respectively connected to the test piece.

[0059] In the embodiment of the present application, the adjustment of the driving parameters of the direct drive mechanism 20 is realized by the controller, and the controller is connected to the acceleration sensor and the grating ruler 70 for communication to realize data feedback control, wherein, those skilled in the art should understand that the embodiments of the present invention can be provided as methods, systems or computer program products. Those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus the necessary general hardware platform, and of course, by hardware. Based on such an understanding, the above technical solution can be essentially or partly contributed to the prior art in the form of a software product, which can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of each embodiment or some parts of the embodiment.

[0060] The above description is only an implementation mode of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly used in other related technical fields, should be included in the protection scope of the present invention.

Claims

1. A direct-drive vibration reduction test bench, characterized in that: include: A frame, wherein the frame is provided with a test area and a power area at intervals along a first direction; A direct drive mechanism, the direct drive mechanism is located in the power area, wherein a driving end of the direct drive mechanism is provided with a driving push rod extending along the first direction to the test area, and the driving push rod is used to connect with the tested object; A pressure assembly is located in the test area and is provided with a pressure platform and a load-bearing seat corresponding to the driving push rod, wherein the pressure platform is located on the side of the load-bearing seat facing the driving push rod along the first direction and is used to connect with the test piece.

2. The direct-drive vibration reduction test bench according to claim 1, characterized in that: The direct-drive vibration reduction test bench also includes a guide assembly, which has a plurality of guide columns that penetrate the load-bearing seat along the first direction, so that the load-bearing seat can be suspended in the test area.

3. The direct-drive vibration reduction test bench according to claim 2, characterized in that: The load-bearing seat is also provided with a plurality of fixing sleeves, wherein the guide column passes through the fixing sleeves.

4. The direct-drive vibration reduction test bench according to claim 2, characterized in that: The frame is also provided with an upper end cover, wherein the guide assembly includes four guide posts, and the four guide posts are circumferentially arranged at four corners of the upper end cover.

5. The direct-drive vibration reduction test bench according to claim 1, characterized in that: The power zone is also provided with a cooling system, which includes a plurality of cooling channels circumferentially arranged on the direct drive mechanism, wherein a coolant can flow through the cooling channels.

6. The direct-drive vibration reduction test bench according to claim 1, characterized in that: An elastic component is further provided at the bottom of the power zone along the first direction, one end of the elastic component is connected to the bottom of the frame, and the other end is connected to the direct drive mechanism.

7. The direct-drive vibration reduction test bench according to any one of claims 1 to 6, characterized in that: The pressure assembly further includes a plurality of weights, which are located along the first direction on a side of the load-bearing seat away from the pressure platform, wherein the upper end cover is provided with a hollow groove corresponding to the load-bearing seat.

8. The direct-drive vibration reduction test bench according to claim 7, characterized in that: The load-bearing seat is further provided with an acceleration sensor and / or the weight is further provided with the acceleration sensor.

9. The direct-drive vibration reduction test bench according to any one of claims 1 to 6, characterized in that: The test area is further provided with one or more grating rulers extending along the first direction, wherein the grating rulers are parallel to the push rod.

10. A testing method, characterized in that: The direct-drive vibration reduction test bench according to any one of claims 1 to 9 comprises: Acquiring test parameters, and adjusting driving parameters of the direct drive mechanism according to the test parameters; Obtaining the weight of the weight of the pressure-applying assembly corresponding to the test parameter and the relative position of the pressure-applying assembly to the guide assembly; The direct drive mechanism is started according to the test parameters, wherein the direct drive mechanism and the pressure-applying assembly are respectively connected to the test piece.

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