A twelve-degree-of-freedom windshield displacement test bench

Abstract

This invention discloses a twelve-degree-of-freedom windshield displacement test bench, belonging to the technical field of windshield displacement test benches. It includes two symmetrically arranged motion assemblies spaced apart. Each motion assembly comprises a base, a lateral motion platform, a longitudinal motion platform, a roll motion platform, a pitch motion platform, a yaw motion platform, and a lifting motion platform. A gap exists between the lifting motion platforms of the two motion assemblies to accommodate the windshield. Each unilateral motion assembly has six degrees of freedom, and the bilateral motion assemblies form twelve degrees of freedom. This simulates the relative positional relationship of the two carriages, more closely matching the actual positional state, making the windshield's working state more consistent with the complex loads and positional changes experienced during actual operation, thus ensuring the authenticity and accuracy of the test data. Furthermore, the lateral motion platform, longitudinal motion platform, and lifting motion platform all utilize electric cylinders for movement. Compared to ball screw drive mechanisms, electric cylinders offer better protection and do not require additional protective sleeves.

Description

Technical Field

[0001] This invention relates to the field of windshield displacement test bench technology, and in particular to a twelve-degree-of-freedom windshield displacement test bench. Background Technology

[0002] The windshield is a crucial component connecting adjacent carriages, primarily used to reduce air resistance, ensure airtightness, reduce noise, and improve passenger comfort. The quality of the windshield directly affects the safety and comfort of train operation. During train operation, complex relative movements occur between adjacent carriages, subjecting the ends of the windshield to multi-degree-of-freedom motion inputs. Because the windshield is a vital link between two carriages, its structural design must undergo thorough testing and verification to ensure sufficient safety.

[0003] Currently, there are two main traditional methods for windshield quality testing. The first method involves testing with a real train on actual tracks. While this method can reflect real-world operating conditions, it suffers from drawbacks such as high manpower and material resources, long testing cycles, and high costs. The second method utilizes windshield displacement testing rigs. Existing testing rigs are mostly six-degree-of-freedom structures, where one end simulates X, Y, and Z-axis movement, and the other end simulates rotation around the X, Y, and Z axes to simulate the relative positional relationship between two carriages. This differs somewhat from the actual working state of the windshield and makes it difficult to accurately reflect the complex loads and positional changes experienced by the windshield during actual operation, resulting in less accurate and realistic test data.

[0004] Therefore, there is an urgent need to develop a windshield displacement testing device that can realistically simulate the displacement and stress state of the windshield in actual operation, while significantly reducing the investment of test resources. Summary of the Invention

[0005] The purpose of this invention is to solve the aforementioned technical problems by providing a twelve-degree-of-freedom windshield displacement test bench. A single-sided motion assembly has six degrees of freedom, and a double-sided motion assembly forms twelve degrees of freedom. This simulates the relative positional relationship between the two carriages, more closely reflecting their actual orientation. This makes the windshield's working state more consistent with the complex loads and positional changes experienced during actual operation, thereby ensuring the authenticity and accuracy of the test data. Furthermore, the lateral motion platform, longitudinal motion platform, and lifting motion platform all utilize electric cylinders for movement. Compared to ball screw drive mechanisms, electric cylinders offer better protection and eliminate the need for additional protective covers.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention discloses a twelve-degree-of-freedom windshield displacement test bench, comprising two kinematic assemblies spaced apart and symmetrically arranged; each kinematic assembly includes a base, a lateral motion platform, a longitudinal motion platform, a roll motion platform, a pitch motion platform, a yaw motion platform, and a lifting motion platform, wherein the lifting motion platforms of the two kinematic assemblies have a gap between them for mounting a windshield; wherein, The transverse motion platform is slidably connected to the base along the X-axis, and the base is provided with a transverse drive electric cylinder for driving the transverse motion platform. The longitudinal motion platform is slidably connected to the transverse motion platform along the Y-axis, and the transverse motion platform is provided with a longitudinal drive electric cylinder for driving the longitudinal motion platform. The rolling motion platform is rotatably connected to the longitudinal motion platform about the X-axis, and the rolling motion platform is provided with a rolling drive mechanism for driving the rolling motion platform. The pitch motion platform is rotatably connected to the roll motion platform about the Y-axis, and the roll motion platform is provided with a pitch drive mechanism for driving the pitch motion platform. The yaw motion platform is rotatably connected to the pitch motion platform about the Z-axis, and the pitch motion platform is provided with a yaw drive mechanism for driving the yaw motion platform. The lifting motion platform is slidably connected to the yaw motion platform along the Z-axis, and the yaw motion platform is equipped with a lifting drive electric cylinder for driving the lifting motion platform.

[0007] In one embodiment, the base is further provided with a transverse linear guide rail extending along the X-axis direction. The transverse motion platform is slidably connected to the transverse linear guide rail via a transverse slider assembly. The cylinder body of the transverse drive electric cylinder is rotatably connected to the base via a transverse fisheye bearing. The piston rod of the transverse drive electric cylinder is rotatably connected to the transverse motion platform via a transverse fisheye joint.

[0008] In one embodiment, the transverse motion platform is further provided with a longitudinal linear guide rail extending along the Y-axis direction. The longitudinal motion platform is slidably connected to the longitudinal linear guide rail via a longitudinal slider assembly. The cylinder body of the longitudinal drive electric cylinder is rotatably connected to the transverse motion platform via a longitudinal fisheye bearing. The piston rod of the longitudinal drive electric cylinder is rotatably connected to the longitudinal motion platform via a longitudinal fisheye joint.

[0009] In one embodiment, the longitudinal motion platform is further provided with a roll shaft, the roll motion platform is rotatably connected to the roll shaft, the roll drive mechanism includes a roll drive electric cylinder, the cylinder body of the roll drive electric cylinder is rotatably connected to the roll motion platform through a roll fisheye bearing, and the piston rod of the roll drive electric cylinder is rotatably connected to the longitudinal motion platform through a roll fisheye joint.

[0010] In one embodiment, the pitch motion platform is further provided with a pitch axis whose axis is parallel to the Y-axis, and the pitch axis is rotatably connected to the roll motion platform.

[0011] In one embodiment, the pitch drive mechanism includes two sets of pitch drive electric cylinders, each set including at least one pitch drive electric cylinder. The cylinder body of the pitch drive electric cylinder is rotatably connected to the roll motion platform via a pitch fisheye bearing, and the piston rod of the pitch drive electric cylinder is rotatably connected to the pitch motion platform via a pitch fisheye joint. The piston rods of the two sets of pitch drive electric cylinders are respectively located on both sides of the center line of the pitch motion platform in the Y-axis direction.

[0012] In one embodiment, the yaw motion platform is further provided with a yaw axis whose axis is set along the Z-axis, and the yaw axis is rotatably connected to the pitch motion platform.

[0013] In one embodiment, the yaw drive mechanism includes two sets of yaw drive electric cylinders, each set including at least one of the yaw drive electric cylinders. The cylinder body of the yaw drive electric cylinder is rotatably connected to the pitch motion platform through a yaw fisheye bearing, and the piston rod of the yaw drive electric cylinder is rotatably connected to the yaw motion platform through a yaw fisheye joint. The piston rods of the two sets of yaw drive electric cylinders are respectively located on both sides of the center line of the yaw motion platform in the Y-axis direction.

[0014] In one embodiment, the yaw motion platform is further provided with a lifting linear guide rail extending along the Z-axis direction. The lifting motion platform is slidably connected to the lifting linear guide rail via a lifting slider assembly. The cylinder body of the lifting drive electric cylinder is rotatably connected to the yaw motion platform via a lifting fisheye bearing. The piston rod of the lifting drive electric cylinder is rotatably connected to the lifting motion platform via a lifting fisheye joint.

[0015] In one embodiment, the lifting platform is provided with a mounting plate for installing the windshield.

[0016] The present invention achieves the following technical effects compared to the prior art: In this invention, both motion assemblies can simulate movement along the X, Y, and Z axes, as well as rotation around these axes. A single-sided motion assembly has six degrees of freedom, while a double-sided assembly provides twelve degrees of freedom. The simulated relative positional relationship between the two carriages more closely matches the actual positional state, making the windshield's working state more consistent with the complex loads and positional changes experienced in actual operation, thus ensuring the authenticity and accuracy of the test data. Furthermore, the lateral motion platform, longitudinal motion platform, and lifting motion platform all utilize electric cylinders for movement. Compared to ball screw drive mechanisms, electric cylinders offer better protection and do not require additional protective covers.

[0017] The other technical solutions of this invention achieve the following technical effects compared to the prior art: 1. The cylinder bodies of each electric cylinder are connected by fisheye bearings, and the piston rods are connected by fisheye joints. Both fisheye bearings and fisheye joints are essentially spherical bearings, which can adapt to the deformation of each platform, reduce the additional load caused by platform deformation, and at the same time reduce the installation accuracy requirements.

[0018] 2. The pitch motion platform uses two sets of electric cylinders (at least two) driven synchronously, which can avoid the pitch platform being subjected to force on one side, reduce the risk of deformation of the pitch platform, and reduce the load on a single electric cylinder, thus improving fatigue strength. At the same time, compared with a single set of electric cylinders (at least one), a passage is left between the two sets of electric cylinders, which makes it easier for the experimenters to move the required items into the windshield during the windshield test. For the sake of stability, a single set of electric cylinders (at least one) usually needs to be placed in the middle position, which is inconvenient for the experimenters to move the test items (such as sandbags, which serve as windshield loads to simulate the weight of passengers and cargo) into and out of the windshield.

[0019] 3. The yaw motion platform adopts two sets of electric cylinders (at least two electric cylinders) for synchronous drive, which can avoid the yaw platform being subjected to force on one side, reduce the risk of deformation of the yaw platform, reduce the load on a single electric cylinder, and improve fatigue strength. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained by analyzing these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of the twelve-degree-of-freedom windshield displacement test bench in an embodiment of the present invention; Figure 2 This is a front view of the twelve-degree-of-freedom windshield displacement test bench in an embodiment of the present invention. Figure 3 This is a right-view stereoscopic structural diagram of the motion assembly on the left side in an embodiment of the present invention; Figure 4 This is a left-side stereoscopic view of the motion assembly on the left side in an embodiment of the present invention; Figure 5 This is a frontal three-dimensional structural diagram of the motion assembly on the left side in an embodiment of the present invention; Figure 6 This is a top-view three-dimensional structural diagram of the base in an embodiment of the present invention; Figure 7 This is a three-dimensional structural diagram illustrating the connection relationship between the base and the transverse motion platform in an embodiment of the present invention; Figure 8 This is a front view structural diagram illustrating the connection relationship between the base and the transverse motion platform in an embodiment of the present invention; Figure 9 This is a top-view three-dimensional structural diagram of the lateral motion platform in an embodiment of the present invention; Figure 10 This is a bottom-view three-dimensional structural diagram of the lateral motion platform in an embodiment of the present invention; Figure 11 This is a top-view three-dimensional structural diagram of the longitudinal motion platform in an embodiment of the present invention; Figure 12 This is a bottom-view three-dimensional structural diagram of the longitudinal motion platform in an embodiment of the present invention; Figure 13 This is a left-side structural schematic diagram of the connection relationship between the longitudinal motion platform and the lateral motion platform in an embodiment of the present invention; Figure 14 This is a top-view three-dimensional structural diagram of the roll motion platform in an embodiment of the present invention; Figure 15 This is a bottom-view three-dimensional structural diagram of the roll motion platform in an embodiment of the present invention; Figure 16 This is a three-dimensional structural diagram illustrating the connection relationship between the roll motion platform and the pitch motion platform in an embodiment of the present invention; Figure 17 This is a right-side three-dimensional structural diagram of the pitch motion platform in an embodiment of the present invention; Figure 18 This is a left-side stereoscopic structural diagram of the pitch motion platform in an embodiment of the present invention; Figure 19 This is a three-dimensional structural diagram illustrating the connection relationship between the pitch motion platform and the yaw motion platform in an embodiment of the present invention; Figure 20 This is a left-side stereoscopic structural diagram of the yaw motion platform in an embodiment of the present invention; Figure 21 This is a right-side stereoscopic view of the yaw motion platform in an embodiment of the present invention. Figure 22 This is a three-dimensional structural diagram illustrating the connection relationship between the yaw motion platform and the lifting motion platform in an embodiment of the present invention; Figure 23 This is a left-side stereoscopic view of the lifting motion platform in an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures: 1. Sport assembly; 2. Windshield mounting plate; 3. Windshield; 11. Base; 12. Lateral motion platform; 13. Longitudinal motion platform; 14. Roll motion platform; 15. Pitch motion platform; 16. Yaw motion platform; 17. Lifting motion platform; 111. Base frame; 112. Base foot pad; 113. Lateral drive electric cylinder; 114. Lateral electric cylinder bracket; 115. Lateral linear guide; 116. Lateral fisheye joint; 117. Lateral fisheye bearing; 118. Lateral slider; 119. Lateral slider transition plate; 121. Lateral motion frame; 122. Lateral slider mounting plate; 123. Lateral joint bracket; 124. Longitudinal drive electric cylinder; 125. Longitudinal linear guide; 126. Longitudinal fisheye joint; 127. Longitudinal slider; 128. Longitudinal slider transition plate; 129. Longitudinal fisheye bearing; 131. Longitudinal motion frame; 132. Longitudinal slider mounting plate; 133. Longitudinal joint bracket; 134. Roll shaft bracket; 135. Roll shaft; 136. Roll joint bracket; 141. Roll motion frame; 142. Roll axis bearing housing; 143. Pitch axis bearing housing; 144. Roll drive electric cylinder; 145. Pitch fisheye bearing; 146. Roll fisheye bearing; 147. Pitch drive electric cylinder; 148. Pitch fisheye joint; 149. Roll fisheye joint; 151. Pitch motion frame; 152. Pitch axis; 153. Pitch axis bracket; 154. Lower yaw bearing housing; 155. Upper yaw bearing housing; 156. Yaw fisheye bearing; 157. Yaw drive electric cylinder; 158. Yaw fisheye joint; 159. Pitch joint bracket; 161. Yaw motion frame; 162. Lifting linear guide rail; 163. Lifting drive cylinder; 164. Lifting cylinder bracket; 165. Yaw joint bracket; 166. Yaw shaft; 167. Lifting fisheye bearing; 168. Lifting fisheye joint; 171. Lifting motion frame; 172. Lifting joint bracket; 173. Lifting slider assembly. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments analyzed and obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The purpose of this invention is to provide a twelve-degree-of-freedom windshield displacement test bench to solve the problems existing in the prior art. Both motion assemblies can simulate movement along the X, Y, and Z axes, as well as rotation around these axes. That is, a single-sided motion assembly has six degrees of freedom, and a double-sided motion assembly forms twelve degrees of freedom. The simulated relative positional relationship between the two carriages is more consistent with the actual positional state, making the windshield's working state more consistent with the complex loads and positional changes experienced in actual operation, thereby ensuring the authenticity and accuracy of the test data. Furthermore, the lateral motion platform, longitudinal motion platform, and lifting motion platform all use electric cylinders for movement. Compared to ball screw drive mechanisms, electric cylinders offer better protection and do not require additional protective sleeves.

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figures 1 to 23 As shown, this embodiment provides a twelve-degree-of-freedom windshield displacement test bench, including two motion assemblies 1. The two motion assemblies 1 are spaced apart and symmetrically arranged. Each motion assembly 1 includes a base 11, a lateral motion platform 12, a longitudinal motion platform 13, a roll motion platform 14, a pitch motion platform 15, a yaw motion platform 16, and a lifting motion platform 17.

[0027] Specifically: The transverse motion platform 12 is slidably connected to the base 11 along the X-axis. The base 11 is provided with a transverse drive electric cylinder 113, which is used to drive the transverse motion platform 12 to move along the X-axis.

[0028] The longitudinal motion platform 13 is slidably connected to the transverse motion platform 12 along the Y-axis. The transverse motion platform 12 is provided with a longitudinal drive electric cylinder 124, which is used to drive the longitudinal motion platform 13 to move along the Y-axis.

[0029] The roll motion platform 14 is rotatably connected to the longitudinal motion platform 13 around the X-axis. The longitudinal motion platform 13 is provided with a roll drive mechanism, which is used to drive the roll motion platform 14 to rotate around the X-axis.

[0030] The pitch motion platform 15 is rotatably connected to the roll motion platform 14 around the Y-axis. The roll motion platform 14 is equipped with a pitch drive mechanism, which is used to drive the pitch motion platform 15 to rotate around the Y-axis.

[0031] The yaw motion platform 16 is rotatably connected to the pitch motion platform 15 around the Z-axis. The pitch motion platform 15 is equipped with a yaw drive mechanism, which is used to drive the yaw motion platform 16 to rotate around the Z-axis.

[0032] The lifting motion platform 17 is slidably connected to the yaw motion platform 16 along the Z-axis. The yaw motion platform 16 is equipped with a lifting drive electric cylinder 163, which is used to drive the lifting motion platform 17 to move along the Z-axis.

[0033] There is a gap between the lifting platforms 17 of the two motion assemblies 1, which allows the windshield 3 to be installed.

[0034] Working principle: The bases 11 of the two motion assemblies 1 are installed horizontally, with the X-axis horizontal, the Y-axis horizontal, and the Z-axis vertical. The two ends of the windshield 3 are installed between the lifting platforms 17 of the two motion assemblies 1. Both motion assemblies 1 can simulate movement along the X, Y, and Z axes, as well as rotation around these axes, simulating the relative positional relationship of the two carriages and enabling the testing of the windshield 3. Since each motion assembly 1 has six degrees of freedom, the two motion assemblies 1 together form twelve degrees of freedom, ensuring that the simulated carriages conform to their actual positional states. This makes the working state of the windshield 3 more consistent with the complex loads and positional changes experienced in actual operation, thus guaranteeing the authenticity and accuracy of the test data.

[0035] In one embodiment of this example, the base 11, the lateral motion platform 12, the longitudinal motion platform 13, the roll motion platform 14, the pitch motion platform 15, the yaw motion platform 16, and the lifting motion platform 17 are stacked sequentially from bottom to top.

[0036] In one embodiment of this invention, the base 11 is further provided with a transverse linear guide rail 115, which extends along the X-axis. The transverse motion platform 12 is slidably connected to the transverse linear guide rail 115 via a transverse slider assembly. The cylinder body of the transverse drive cylinder 113 is rotatably connected to the base 11 via a transverse fisheye bearing 117, and the piston rod of the transverse drive cylinder 113 is rotatably connected to the transverse motion platform 12 via a transverse fisheye joint 116. The extension and retraction of the piston rod of the transverse drive cylinder 113 drives the transverse motion platform 12 to move along the transverse linear guide rail 115 (X-axis direction). The transverse fisheye joint 116 and the transverse fisheye bearing 117 are essentially fisheye bearings, also known as joint bearings, which can reduce the installation accuracy requirements and accommodate the deformation of the base 11 and the transverse motion platform 12, reducing the additional load caused by the deformation of the base 11 and the transverse motion platform 12.

[0037] In one embodiment of this invention, the base 11 is located at the bottom of the motion assembly 1. The base 11 includes a base frame 111, a base foot plate 112, and a transverse electric cylinder bracket 114. The base foot plate 112 is located at the bottom of the base frame 111 and is used to support and fix the entire motion assembly 1. The transverse linear guide rails 115 of the transverse drive electric cylinder 113 are all mounted on the base frame 111. The transverse electric cylinder bracket 114 is mounted on the base frame 111, and two transverse fisheye bearings 117 are mounted on the transverse electric cylinder bracket 114. The two transverse fisheye bearings 117 are respectively located on both sides of the transverse drive electric cylinder 113, and the cylinder body of the transverse drive electric cylinder 113 is mounted on the two transverse fisheye bearings 117.

[0038] In one embodiment of this invention, the transverse slider assembly includes a transverse slider 118, a transverse slider transition plate 119, and a transverse slider mounting plate 122. The transverse slider 118 is slidably connected to the transverse linear guide rail 115, the transverse slider transition plate 119 is mounted on the transverse slider 118, and the transverse slider mounting plate 122 is mounted on the transverse motion platform 12. The transverse slider mounting plate 122 is used to connect with the transverse slider transition plate 119, and the connection method can be welding or bolting.

[0039] In one embodiment of this invention, the base frame 111 may be welded from metal profiles, such as steel.

[0040] In one embodiment of this invention, the transverse motion platform 12 is further provided with a longitudinal linear guide rail 125, which extends along the Y-axis. The longitudinal motion platform 13 is slidably connected to the longitudinal linear guide rail 125 via a longitudinal slider assembly. The cylinder body of the longitudinal drive cylinder 124 is rotatably connected to the transverse motion platform 12 via a longitudinal fisheye bearing 129, and the piston rod of the longitudinal drive cylinder 124 is rotatably connected to the longitudinal motion platform 13 via a longitudinal fisheye joint 126. The extension and retraction of the piston rod of the longitudinal drive cylinder 124 enables the longitudinal motion platform 13 to move along the longitudinal linear guide rail 125 (Y-axis direction). The longitudinal fisheye bearing 129 and the longitudinal fisheye joint 126 are essentially fisheye bearings, which reduces the installation accuracy requirements and can accommodate the deformation of the transverse motion platform 12 and the longitudinal motion platform 13, reducing the additional load caused by the deformation of the transverse motion platform 12 and the longitudinal motion platform 13.

[0041] In one embodiment of this invention, the lateral motion platform 12 includes a lateral motion frame 121, a lateral joint bracket 123, and a longitudinal electric cylinder bracket. The lateral slider mounting plate 122 and the lateral joint bracket 123 are both located at the bottom of the lateral motion frame 121. The lateral slider mounting plate 122 is connected to the lateral slider transition plate 119. The lateral joint bracket 123 is connected to a lateral fisheye joint 116. A longitudinal linear guide rail 125 is mounted above the lateral motion frame 121. Two longitudinal fisheye bearings 129 are mounted on the longitudinal electric cylinder bracket. The cylinder body of the longitudinal drive electric cylinder 124 is mounted on the two longitudinal fisheye bearings 129, and the piston rod of the longitudinal drive electric cylinder 124 is mounted with a longitudinal fisheye joint 126, which is connected to the longitudinal motion platform 13.

[0042] In one embodiment of this invention, the longitudinal slider assembly includes a longitudinal slider 127, a longitudinal slider transition plate 128, and a longitudinal slider mounting plate 132. The longitudinal slider 127 is slidably connected to a longitudinal linear guide 125, and the longitudinal slider transition plate 128 is mounted on the longitudinal linear guide 125. The longitudinal slider mounting plate 132 is mounted on the longitudinal motion platform 13. The longitudinal slider mounting plate 132 is used to connect with the longitudinal slider transition plate 128 to mount the longitudinal motion platform 13 onto the transverse motion platform 12.

[0043] In one embodiment of this invention, the transverse motion frame 121 may be welded from metal profiles, such as steel.

[0044] In one embodiment of this invention, a roll shaft 135 is further provided on the longitudinal motion platform 13. The roll motion platform 14 is rotatably connected to the roll shaft 135. The roll drive mechanism includes a roll drive electric cylinder 144, the cylinder body of which is rotatably connected to the roll motion platform 14 via a roll fisheye bearing 146, and the piston rod of which is rotatably connected to the longitudinal motion platform 13 via a roll fisheye joint 149.

[0045] In one embodiment of this invention, the longitudinal motion platform 13 comprises a longitudinal motion frame 131, a longitudinal joint bracket 133, a roll shaft bracket 134, and a roll joint bracket 136. The longitudinal joint bracket 133 is mounted on the side of the longitudinal motion platform 13, and is connected to the piston rod of the longitudinal drive cylinder 124 via a longitudinal fisheye joint 126. The roll shaft bracket 134 is mounted above the longitudinal motion frame 131, and a roll shaft 135 is mounted on the roll shaft bracket 134. The roll joint bracket 136 is mounted above the longitudinal motion frame 131. The roll joint bracket 136 is connected to a roll fisheye joint 149 on the piston rod of the roll drive cylinder 144.

[0046] In one embodiment of this example, the pitch motion platform 15 is further provided with a pitch axis 152, the axis of the pitch axis 152 is parallel to the Y axis, and the pitch axis 152 is rotatably connected to the roll motion platform 14.

[0047] In one embodiment of this invention, the pitch drive mechanism includes two sets of pitch drive cylinders 147, each set including at least one pitch drive cylinder 147. The cylinder body of each pitch drive cylinder 147 is rotatably connected to the roll motion platform 14 via a pitch spherical bearing 145, and the piston rod of each pitch drive cylinder 147 is rotatably connected to the pitch motion platform 15 via a pitch spherical joint 148. The piston rods of the two sets of pitch drive cylinders 147 are respectively located on both sides of the centerline of the pitch motion platform 15 in the Y-axis direction.

[0048] In one embodiment of this invention, the roll motion platform 14 includes a roll motion frame 141, a roll axis bearing seat 142, a pitch axis bearing seat 143, a pitch cylinder bracket, and a roll cylinder bracket. The roll axis bearing seat 142 is installed at the bottom of the roll motion platform 14 and connects to the roll axis 135 on the longitudinal motion platform 13, supporting the roll motion platform 14 and enabling connection with the longitudinal motion platform 13. The pitch axis bearing seat 143 is installed at the bottom of the front end of the roll motion platform 14 and connects to and supports the pitch axis 152 on the pitch motion platform 15. The pitch cylinder bracket is installed above the roll motion platform 14, and a pitch spherical bearing 145 is mounted on the pitch cylinder bracket for connecting to the cylinder body of the pitch drive cylinder 147. The piston rod of the pitch drive cylinder 147 is connected to the pitch motion platform 15 via a pitch spherical joint 148. A roll cylinder bracket is mounted on the roll motion platform 14. A roll spherical bearing 146 is mounted on the roll cylinder bracket, which is used to connect the cylinder body of the roll drive cylinder 144. The roll spherical joint 149 on the piston rod of the roll drive cylinder 144 is connected to the roll joint bracket 136. Driven by the roll drive cylinder 144, the roll motion platform 14 achieves roll motion relative to the longitudinal motion platform 13 around the roll axis 135. A pitch drive cylinder 147 is used to drive the pitch motion platform 15, which achieves pitch motion relative to the roll motion platform 14 around the pitch axis 152.

[0049] In one embodiment of this invention, the rolling motion frame 141 may be welded from metal profiles, such as steel.

[0050] In one embodiment of this invention, the yaw motion platform 16 is further provided with a yaw axis 166, the axis of which is set along the Z-axis. The yaw axis 166 is rotatably connected to the pitch motion platform 15.

[0051] In one embodiment of this invention, the yaw drive mechanism includes two sets of yaw drive electric cylinders 157, each set including at least one yaw drive electric cylinder 157. The cylinder body of the yaw drive electric cylinder 157 is rotatably connected to the pitch motion platform 15 via a yaw fisheye bearing 156, and the piston rod of the yaw drive electric cylinder 157 is rotatably connected to the yaw motion platform 16 via a yaw fisheye joint 158. The piston rods of the two sets of yaw drive electric cylinders 157 are respectively located on both sides of the centerline of the yaw motion platform 16 in the Y-axis direction.

[0052] In one embodiment of this invention, the pitch motion platform 15 includes a pitch motion frame 151, a pitch axis bracket 153, an upper yaw bearing seat 155, a lower yaw bearing seat 154, a pitch joint bracket 159, and a yaw cylinder bracket. The pitch axis bracket 153 is mounted on both sides of the bottom of the pitch motion frame 151. One end of the pitch axis 152 is mounted on the pitch axis bracket 153, and the other end of the pitch axis 152 is connected to the pitch axis bearing seat 143 of the roll motion platform 14. The upper yaw bearing seat 155 is connected above the front end of the pitch motion frame 151, and the lower yaw bearing seat 154 is connected below it. The upper yaw bearing seat 155 and the lower yaw bearing seat 154 are each connected to a yaw axis 166 via their respective bearings. The yaw cylinder bracket is mounted on the side above the pitch motion frame 151. A yaw fisheye bearing 156 is mounted on the yaw cylinder bracket for connection to the cylinder body of the yaw drive cylinder 157. The pitch joint bracket 159 is mounted on the back side of the pitch motion frame 151. The pitch joint bracket 159 is used to connect the pitch fisheye joint 148 on the piston rod of the pitch drive electric cylinder 147.

[0053] Driven by the pitch drive cylinder 147, the pitch motion platform 15 performs pitch motion (rotation about the Y-axis) relative to the roll motion platform 14 around the pitch axis 152. Driven by the yaw drive cylinder 157, the yaw motion platform 16 performs yaw motion (rotation about the Z-axis) relative to the pitch motion platform 15.

[0054] In one embodiment of this invention, the pitch motion frame 151 may be welded from metal profiles, such as steel.

[0055] In one embodiment of this invention, the yaw motion platform 16 is further provided with a lifting linear guide rail 162, which extends along the Z-axis. The lifting motion platform 17 is slidably connected to the lifting linear guide rail 162 via a lifting slider assembly 173. The cylinder body of the lifting drive electric cylinder 163 is rotatably connected to the yaw motion platform 16 via a lifting fisheye bearing 167, and the piston rod of the lifting drive electric cylinder 163 is rotatably connected to the lifting motion platform 17 via a lifting fisheye joint 168.

[0056] In one embodiment of this invention, the yaw motion platform 16 includes a yaw motion frame 161, a lifting linear guide rail 162, a lifting electric cylinder bracket 164, and a yaw joint bracket 165. The lifting linear guide rail 162 is installed at the front end of the yaw motion frame 161. The lifting linear guide rail 162 connects to and supports the lifting motion platform 17 and provides guidance for it. The lifting electric cylinder bracket 164 is installed on the yaw motion frame 161, and a lifting fisheye bearing 167 is installed on the lifting electric cylinder bracket 164. The lifting fisheye bearing 167 is connected to the cylinder body of the lifting drive electric cylinder 163. A lifting fisheye joint 168 is provided on the piston rod of the lifting fisheye bearing 167, and the lifting fisheye joint 168 is connected to the lifting motion platform 17. The yaw joint bracket 165 is installed on both sides of the yaw motion frame 161, and the yaw joint bracket 165 is used to connect to the yaw fisheye joint 158 ​​of the yaw drive electric cylinder 157.

[0057] There are two yaw shafts 166, one installed at the bottom and the other inside the yaw motion frame 161. The bottom yaw shaft 166 is connected to the lower yaw bearing seat 154 of the pitch motion platform 15, while the inner yaw shaft 166 is connected to the upper yaw bearing seat 155 of the pitch motion platform 15. Driven by the yaw drive electric cylinder 157, the yaw motion platform 16 moves around the yaw shafts 166, yawing relative to the pitch motion platform 15.

[0058] In one embodiment of this invention, the lifting slider assembly 173 includes a lifting slider, a lifting slider transition plate, and a lifting slider mounting plate. The lifting slider is slidably connected to the lifting linear guide rail 162, the lifting slider transition plate is mounted on the lifting slider, and the lifting slider mounting plate is mounted on the lifting motion platform 17. The lifting motion platform 17 is connected to the lifting slider transition plate via the lifting slider mounting plate.

[0059] In one embodiment of this invention, the lifting platform 17 is provided with a windshield mounting plate 2 for mounting a windshield 3. The windshield 3 and the windshield mounting plate 2 can be connected by bolts. The windshield mounting plate 2 can be connected to the lifting platform 17 by welding or bolts.

[0060] In one embodiment of this invention, the lifting platform 17 includes a lifting frame 171 and a lifting joint bracket 172. Both the lifting slider mounting plate and the lifting joint bracket 172 are mounted at the rear end of the lifting frame 171. The lifting joint bracket 172 is connected to the lifting spherical joint 168 of the lifting drive cylinder 163. To achieve the connection and lifting motion of the lifting motion platform 17 and the yaw motion platform 16.

[0061] In one embodiment of this invention, both the windshield mounting plate 2 and the lifting motion frame 171 have hollowed-out channels in the middle, which facilitates the experimenters to move the required items into the windshield 3 during the experiment.

[0062] In one embodiment of this example, each electric cylinder may be a servo electric cylinder.

[0063] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A twelve-degree-of-freedom windshield displacement test bench, characterized in that, The system includes two symmetrically arranged motion assemblies spaced apart. Each motion assembly comprises a base, a lateral motion platform, a longitudinal motion platform, a roll motion platform, a pitch motion platform, a yaw motion platform, and a lifting motion platform. A gap exists between the lifting motion platforms of the two motion assemblies, allowing for the installation of a windshield. The transverse motion platform is slidably connected to the base along the X-axis, and the base is provided with a transverse drive electric cylinder for driving the transverse motion platform. The longitudinal motion platform is slidably connected to the transverse motion platform along the Y-axis, and the transverse motion platform is provided with a longitudinal drive electric cylinder for driving the longitudinal motion platform. The rolling motion platform is rotatably connected to the longitudinal motion platform about the X-axis, and the rolling motion platform is provided with a rolling drive mechanism for driving the rolling motion platform. The pitch motion platform is rotatably connected to the roll motion platform about the Y-axis, and the roll motion platform is provided with a pitch drive mechanism for driving the pitch motion platform. The yaw motion platform is rotatably connected to the pitch motion platform about the Z-axis, and the pitch motion platform is provided with a yaw drive mechanism for driving the yaw motion platform. The lifting motion platform is slidably connected to the yaw motion platform along the Z-axis, and the yaw motion platform is equipped with a lifting drive electric cylinder for driving the lifting motion platform.

2. The twelve-degree-of-freedom windshield displacement test bench according to claim 1, characterized in that, The base is also provided with a transverse linear guide rail extending along the X-axis. The transverse motion platform is slidably connected to the transverse linear guide rail via a transverse slider assembly. The cylinder body of the transverse drive electric cylinder is rotatably connected to the base via a transverse fisheye bearing. The piston rod of the transverse drive electric cylinder is rotatably connected to the transverse motion platform via a transverse fisheye joint.

3. The twelve-degree-of-freedom windshield displacement test bench according to claim 1, characterized in that, The transverse motion platform is also provided with a longitudinal linear guide rail extending along the Y-axis. The longitudinal motion platform is slidably connected to the longitudinal linear guide rail via a longitudinal slider assembly. The cylinder body of the longitudinal drive electric cylinder is rotatably connected to the transverse motion platform via a longitudinal fisheye bearing. The piston rod of the longitudinal drive electric cylinder is rotatably connected to the longitudinal motion platform via a longitudinal fisheye joint.

4. The twelve-degree-of-freedom windshield displacement test bench according to claim 3, characterized in that, The longitudinal motion platform is also provided with a roll shaft, and the roll motion platform is rotatably connected to the roll shaft. The roll drive mechanism includes a roll drive electric cylinder. The cylinder body of the roll drive electric cylinder is rotatably connected to the roll motion platform through a roll fisheye bearing, and the piston rod of the roll drive electric cylinder is rotatably connected to the longitudinal motion platform through a roll fisheye joint.

5. The twelve-degree-of-freedom windshield displacement test bench according to claim 1, characterized in that, The pitch motion platform is also provided with a pitch axis whose axis is parallel to the Y-axis, and the pitch axis is rotatably connected to the roll motion platform.

6. The twelve-degree-of-freedom windshield displacement test bench according to claim 5, characterized in that, The pitch drive mechanism includes two sets of pitch drive electric cylinders, each set including at least one pitch drive electric cylinder. The cylinder body of the pitch drive electric cylinder is rotatably connected to the roll motion platform through a pitch fisheye bearing. The piston rod of the pitch drive electric cylinder is rotatably connected to the pitch motion platform through a pitch fisheye joint. The piston rods of the two sets of pitch drive electric cylinders are respectively located on both sides of the center line of the pitch motion platform in the Y-axis direction.

7. The twelve-degree-of-freedom windshield displacement test bench according to claim 1, characterized in that, The yaw motion platform is also provided with a yaw axis whose axis is set along the Z-axis, and the yaw axis is rotatably connected to the pitch motion platform.

8. The twelve-degree-of-freedom windshield displacement test bench according to claim 7, characterized in that, The yaw drive mechanism includes two sets of yaw drive electric cylinders, each set including at least one yaw drive electric cylinder. The cylinder body of the yaw drive electric cylinder is rotatably connected to the pitch motion platform through a yaw fisheye bearing. The piston rod of the yaw drive electric cylinder is rotatably connected to the yaw motion platform through a yaw fisheye joint. The piston rods of the two sets of yaw drive electric cylinders are respectively located on both sides of the center line of the yaw motion platform in the Y-axis direction.

9. The twelve-degree-of-freedom windshield displacement test bench according to claim 1, characterized in that, The yaw motion platform is also provided with a lifting linear guide rail extending along the Z-axis. The lifting motion platform is slidably connected to the lifting linear guide rail through a lifting slider assembly. The cylinder body of the lifting drive electric cylinder is rotatably connected to the yaw motion platform through a lifting fisheye bearing. The piston rod of the lifting drive electric cylinder is rotatably connected to the lifting motion platform through a lifting fisheye joint.

10. The twelve-degree-of-freedom windshield displacement test bench according to claim 1, characterized in that, The lifting platform is equipped with a mounting plate for installing the windshield.

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