Yaw rotation bearing type twelve-degree-of-freedom wind shield displacement test bench

Abstract

This invention discloses a 12-DOF windshield displacement test bench with a yaw bearing, 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 yaw motion platform, a pitch motion platform, a roll motion platform, a longitudinal motion platform, and a lifting motion platform connected in sequence. The yaw motion platform is driven by a yaw drive mechanism, which includes a yaw bearing and a yaw power unit. A single-sided motion assembly has six degrees of freedom, and the double-sided motion assembly forms twelve degrees of freedom. The simulated relative posture of the two carriages more closely matches the real posture, ensuring the authenticity and accuracy of the test data. Furthermore, the longitudinal motion platform is located in the penultimate position, and the yaw motion platform is located in the second-to-last position, guided and supported by a yaw bearing, which reduces the risk of deformation of the longitudinal and yaw motion platforms.

Description

Technical Field

[0001] This invention relates to the field of windshield displacement test bench technology, and in particular to a yaw bearing type 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 12-DOF windshield displacement test bench with a yaw bearing. The single-sided motion assembly has six degrees of freedom, and the double-sided motion assembly forms twelve degrees of freedom, making the simulated relative positional relationship between the two carriages more consistent with the real positional state. This ensures that the windshield's working state more closely matches the complex loads and positional changes experienced during actual operation, thereby guaranteeing the authenticity and accuracy of the test data. Furthermore, the longitudinal motion platform is located in the penultimate position among all motion platforms, reducing the force on the Y-direction movement, making it lighter, and extending its service life. The yaw motion platform is located in the second-to-last position in the sequence of motion platforms, and uses a yaw bearing for guidance and support, making yaw motion simpler and reducing the risk of deformation of the yaw motion platform.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention discloses a yaw slewing bearing type twelve-degree-of-freedom windshield displacement test bench, comprising two kinematic assemblies spaced apart and symmetrically arranged; each kinematic assembly comprises a base, a lateral motion platform, a yaw motion platform, a pitch motion platform, a roll motion platform, a longitudinal motion platform, and a lifting motion platform connected in sequence, wherein the lifting motion platforms of the two kinematic assemblies have a gap between them for installing a windshield; The lateral motion platform is driven by a lateral drive mechanism and can move along the X-axis; The yaw motion platform is driven by a yaw drive mechanism and can rotate around the Z-axis; The pitch motion platform is driven by a pitch drive mechanism and can rotate around the Y-axis; The rolling motion platform is driven by a rolling drive mechanism and can rotate around the X-axis; The longitudinal motion platform is driven by a longitudinal drive mechanism and can move along the Y-axis; The lifting motion platform is driven by a lifting drive mechanism and can move around the Z-axis; The yaw drive mechanism includes a yaw slewing bearing and a yaw power unit. The lateral motion platform and the yaw motion platform are rotatably connected through the yaw slewing bearing, and the yaw power unit is used to drive the yaw motion platform to rotate.

[0007] In one embodiment, the yaw bearing includes an inner ring and an outer ring. The inner ring is fixedly connected to the lateral motion platform, and the outer ring is fixedly connected to the yaw motion platform. The inner ring is a gear ring. The yaw power device includes a yaw drive motor and a gear. The yaw drive motor is connected to the yaw motion platform, and the gear is coaxially fixedly connected to the output shaft of the yaw drive motor. The gear meshes with the gear ring.

[0008] In one embodiment, the yaw drive motor is an electric motor.

[0009] In one embodiment, the base is provided with a transverse linear guide rail extending along the X-axis, and the transverse motion platform is slidably connected to the transverse linear guide rail via a transverse slider assembly; the transverse drive mechanism includes a transverse drive electric cylinder, the cylinder body of the transverse drive electric cylinder is rotatably connected to the base via a transverse fisheye bearing, and the piston rod of the transverse drive electric cylinder is rotatably connected to the transverse motion platform via a transverse fisheye joint.

[0010] In one embodiment, the pitch motion platform is provided with a pitch axis whose axis is parallel to the Y-axis, and the pitch axis is rotatably connected to the yaw 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 pitch motion platform through a pitch fisheye bearing, and the piston rod of the pitch drive electric cylinder is rotatably connected to the yaw motion platform through a pitch fisheye joint. The two sets of pitch drive electric cylinders are respectively located on both sides of the center point of the pitch motion platform in the Y-axis direction.

[0012] In one embodiment, the roll motion platform is provided with a roll shaft, which is rotatably connected to the pitch motion platform; the roll drive mechanism includes two sets of roll drive electric cylinders, 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. The two sets of roll drive electric cylinders are respectively located on both sides of the center point of the roll motion platform in the X-axis direction.

[0013] In one embodiment, the rolling motion platform is provided with a longitudinal linear guide rail extending along the Y-axis direction, and the longitudinal motion platform is slidably connected to the longitudinal linear guide rail via a longitudinal slider assembly; the longitudinal drive mechanism includes two sets of longitudinal drive electric cylinders, the cylinder body of the longitudinal drive electric cylinder is rotatably connected to the rolling motion platform via a longitudinal fisheye bearing, and the piston rod of the longitudinal drive electric cylinder is rotatably connected to the longitudinal motion platform via a longitudinal fisheye joint, and the two sets of longitudinal drive electric cylinders are respectively located on both sides of the center point of the rolling motion platform in the Y-axis direction.

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

[0015] In one embodiment, the lifting platform is provided with a windshield 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 resembles 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 longitudinal motion platform is located in the penultimate position among all motion platforms, reducing the force on the Y-axis movement, making it lighter, and increasing its service life. Since the cumulative movement distance of the longitudinal motion platform's drive mechanism is the longest during windshield fatigue testing, the lifespan of the Y-axis directly determines the lifespan of the test bench. Therefore, reducing the load in the Y-axis improves the fatigue life of the test bench. The yaw motion platform is located in the second-to-last position in the sequence of motion platforms, and uses yaw bearings for guidance and support, making yaw movement simpler and reducing the risk of deformation of the yaw motion platform.

[0017] The other technical solutions of this invention achieve the following technical effects compared to the prior art: 1. The yaw motion platform uses a yaw slewing bearing for rotation guidance and support. Combined with the yaw drive motor and gear drive method, compared with the stretching drive method through two yaw shafts and yaw drive electric cylinder, the yaw motion is simpler and the deformation of the yaw motion platform is reduced.

[0018] 2. The rolling motion platform adopts the coordinated drive of two sets of rolling drive electric cylinders, making the rolling motion easier.

[0019] 3. 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. 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 schematic diagram of the yaw bearing type twelve-degree-of-freedom windshield displacement test bench in an embodiment of the present invention; Figure 2 This is a front view structural schematic diagram of the yaw bearing type 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 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 top-view three-dimensional structural diagram of the lateral motion platform in an embodiment of the present invention; Figure 9 This is a bottom-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 showing the connection relationship between the lateral motion platform and the yaw motion platform in an embodiment of the present invention; Figure 11 This is a top-view three-dimensional structural diagram showing the connection relationship between the lateral motion platform and the yaw motion platform in an embodiment of the present invention; Figure 12 This is a front view schematic diagram of the connection relationship between the lateral motion platform and the yaw motion platform in an embodiment of the present invention; Figure 13 This is a bottom-view three-dimensional structural diagram of the yaw motion platform in an embodiment of the present invention; Figure 14 This is a top-view three-dimensional structural diagram of the yaw motion platform in an embodiment of the present invention; Figure 15 This is a top-view three-dimensional structural diagram of the pitch motion platform in an embodiment of the present invention; Figure 16 This is a three-dimensional structural diagram illustrating the connection relationship between the pitch motion platform and the roll motion platform in an embodiment of the present invention; Figure 17 This is a left-side three-dimensional structural diagram of the roll motion platform in an embodiment of the present invention; Figure 18 This is a right-side three-dimensional structural diagram of the roll motion platform in an embodiment of the present invention; Figure 19 This is a right-view three-dimensional structural diagram illustrating the connection relationship between the roll motion platform and the longitudinal motion platform in an embodiment of the present invention. Figure 20 This is a left-side stereoscopic view of the longitudinal motion platform in an embodiment of the present invention; Figure 21This is a right-view stereoscopic structural diagram of the longitudinal motion platform in an embodiment of the present invention; Figure 22 This is a left-view three-dimensional structural diagram illustrating the connection relationship between the longitudinal motion platform and the lifting motion platform in an embodiment of the present invention; Figure 23 This is a right-view three-dimensional structural diagram illustrating the connection relationship between the longitudinal motion platform and the lifting motion platform in an embodiment of the present invention; Figure 24 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. Yaw motion platform; 14. Pitch motion platform; 15. Roll motion platform; 16. Longitudinal 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 rail; 116. Lateral spherical joint; 117. Lateral spherical bearing; 121. Lateral motion frame; 122. Lateral joint support; 123. Lateral slider assembly; 124. Inner ring; 131. Yaw motion frame; 132. Yaw drive motor; 133. Pitch bearing housing; 134. Pitch joint support; 135. Outer ring; 136. Gear; 141. Pitch motion frame; 142. Pitch axis; 143. Roll bearing housing; 144. Pitch cylinder bracket; 145. Pitch drive cylinder; 146. Roll joint bracket; 147. Pitch fisheye joint; 148. Pitch fisheye bearing; 151. Roll motion frame; 152. Roll shaft; 153. Roll electric cylinder bracket; 154. Roll drive electric cylinder; 155. Longitudinal electric cylinder bracket; 156. Longitudinal drive electric cylinder; 157. Longitudinal linear guide; 158. Longitudinal fisheye joint; 159. Longitudinal fisheye bearing; 161. Longitudinal motion frame; 162. Longitudinal slider assembly; 163. Lifting slider assembly; 164. Longitudinal joint support; 165. Lifting joint support; 171. Lifting motion frame; 172. Lifting linear guide rail; 173. Lifting electric cylinder bracket; 174. Lifting drive electric cylinder; 175. Lifting fisheye joint; 176. Lifting fisheye bearing. 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 12-DOF windshield displacement test bench with a yaw bearing, to solve the problems existing in the prior art. A single-sided motion assembly has six degrees of freedom, while a double-sided motion assembly forms twelve degrees of freedom. The simulated relative posture of the two carriages more closely matches the real posture, ensuring the authenticity and accuracy of the test data. Furthermore, the longitudinal motion platform is located in the penultimate position, which reduces the risk of deformation, lowers the load, and increases the fatigue life of the longitudinal motion platform, thereby extending the overall lifespan of the test bench. The yaw motion platform is located in the second-to-last position and uses a yaw bearing for guidance and support, which reduces the risk of deformation of the yaw motion platform.

[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 24 As shown, this embodiment provides a yaw bearing type 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 yaw motion platform 13, a pitch motion platform 14, a roll motion platform 15, a longitudinal motion platform 16, and a lifting motion platform 17 connected in sequence. There is a gap between the lifting motion platforms 17 of the two motion assemblies 1 for mounting a windshield 3.

[0027] Specifically: The transverse motion platform 12 is driven by a transverse drive mechanism and can move along the X-axis; The yaw motion platform 13 is driven by a yaw drive mechanism and can rotate around the Z-axis; The pitch motion platform 14 is driven by a pitch drive mechanism and can rotate around the Y-axis; The roll motion platform 15 is driven by a roll drive mechanism and can rotate around the X-axis; The longitudinal motion platform 16 is driven by a longitudinal drive mechanism and can move along the Y-axis; The lifting motion platform 17 is driven by a lifting drive mechanism and can move around the Z-axis; The yaw drive mechanism includes a yaw slewing bearing and a yaw power unit. The lateral motion platform 12 and the yaw motion platform 13 are rotatably connected by the yaw slewing bearing. The yaw power unit is used to drive the bearing ring (outer ring 135 or inner ring 124, depending on which one is connected to the yaw motion platform 13) connected to the yaw slewing bearing to rotate, so as to drive the yaw motion platform 13 to rotate around the Z-axis.

[0028] 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.

[0029] In one embodiment of this invention, the base 11, the lateral motion platform 12, the yaw motion platform 13, the pitch motion platform 14, the roll motion platform 15, the longitudinal motion platform 16, and the lifting motion platform 17 are stacked sequentially. Specifically, the base 11 is located at the bottom of the motion assembly 1. The lateral motion platform 12 is mounted on the upper end of the base 11 and moves up and down relative to the base 11, reciprocating in the X direction relative to the base 11. The yaw motion platform 13 is mounted on the lateral motion platform 12 and rotates around the Z-axis (yaw motion) relative to the lateral motion platform 12. The pitch motion platform 14 is mounted on the yaw motion platform 13 and swings around the Y-axis (pitch motion) relative to the yaw motion platform 13. The roll motion platform 15 is mounted on the yaw motion platform 13 and swings around the X-axis (roll motion) relative to the yaw motion platform 13. The longitudinal motion platform 16 is mounted at the front end of the roll motion platform 15 and reciprocates in the Y direction relative to the roll motion platform 15. The lifting motion platform 17 is installed at the front end of the longitudinal motion platform 16 and performs Z-axis reciprocating motion relative to the longitudinal motion platform 16.

[0030] In one embodiment of this invention, the yaw bearing includes an inner ring 124 and an outer ring 135. The inner ring 124 is fixedly connected to the lateral motion platform 12 (usually by welding or bolting), and the outer ring 135 is fixedly connected to the yaw motion platform 13 (usually by welding or bolting). The inner ring 124 is a gear ring. The yaw power unit includes a yaw drive motor 132 and a gear 136. The yaw drive motor 132 is fixedly connected to the yaw motion platform 13. The gear 136 is coaxially connected (fixedly connected) to the output shaft of the yaw drive motor 132, and the gear 136 meshes with the gear ring (inner ring 124). The yaw drive motor 132 drives the gear 136, causing the gear 136 to move along the inner wall of the gear ring (inner ring 124), thereby realizing the rotation of the yaw drive motor 132 about the Z-axis.

[0031] In one embodiment of this example, the yaw drive motor 132 is an electric motor or a hydraulic motor.

[0032] In one embodiment of this invention, a transverse linear guide rail 115 extending along the X-axis is provided on the base 11. The transverse motion platform 12 is slidably connected to the transverse linear guide rail 115 via a transverse slider assembly 123. The transverse drive mechanism includes a transverse drive electric cylinder 113, the cylinder body of which is rotatably connected to the base 11 via a transverse fisheye bearing 117, and the piston rod of which is rotatably connected to the transverse motion platform 12 via a transverse fisheye joint 116.

[0033] In one embodiment of this invention, 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 drive electric cylinder 113 and the transverse linear guide rail 115 are both mounted on the base frame 111. The transverse electric cylinder bracket 114 is mounted on the base frame 111 and is used to connect the transverse drive electric cylinder 113 and the base frame 111. Two transverse fisheye bearings 117 are mounted on the transverse electric cylinder bracket 114, and the cylinder body of the transverse drive electric cylinder 113 is mounted on the two transverse fisheye bearings 117. The transverse drive electric cylinder 113 is used to drive and connect the transverse motion platform 12. The transverse linear guide rail 115 is mounted on the top of the base frame 111 and is used to connect to and support the transverse motion platform 12, and to provide guidance for it.

[0034] In one embodiment of this invention, the base frame 111 may be welded from metal profiles, such as steel.

[0035] In one embodiment of this invention, the lateral motion platform 12 includes a lateral motion frame 121, a lateral joint bracket 122, and a lateral slider assembly 123. The lateral slider assembly 123 is mounted on the bottom of the lateral motion frame 121 and connected to the lateral linear guide rail 115 on the base 11. The lateral joint bracket 122 is located at the front end of the bottom of the lateral motion frame 121 and is connected to the lateral fisheye joint 116 of the lateral drive cylinder 113, thereby connecting the base 11 and the lateral drive cylinder 113. The lateral motion frame 121 includes a lateral frame portion and a yaw bearing mounting plate, with the yaw bearing mounting plate located above the lateral frame portion. The inner ring 124 of the yaw bearing is mounted above the yaw bearing mounting plate. The inner ring 124 of the yaw bearing has a mounting hole for connecting and fixing to the yaw bearing mounting plate. The inner wall of the inner ring 124 has ring teeth for meshing with the gear 136 on the yaw motion platform 13. The inner ring 124 of the yaw bearing cooperates with the outer ring 135 of the yaw bearing on the yaw motion platform 13 to form a yaw bearing and complete the yaw motion around the Z-axis.

[0036] In one embodiment of this invention, the transverse motion frame 121 may be welded from metal profiles, such as steel.

[0037] In one embodiment of this example, the pitch motion platform 14 is provided with a pitch axis 142, the axis of the pitch axis 142 is parallel to the Y-axis, and the pitch axis 142 is rotatably connected to the yaw motion platform 13.

[0038] In one embodiment of this invention, the pitch drive mechanism includes two sets of pitch drive electric cylinders 145, each set including at least one pitch drive electric cylinder 145. The cylinder body of the pitch drive electric cylinder 145 is rotatably connected to the pitch motion platform 14 via a pitch fisheye bearing 148, and the piston rod of the pitch drive electric cylinder 145 is rotatably connected to the yaw motion platform 13 via a pitch fisheye joint 147. The two sets of pitch drive electric cylinders 145 are respectively located on both sides of the center point of the pitch motion platform 14 in the Y-axis direction.

[0039] In one embodiment of this invention, the yaw motion platform 13 includes a yaw motion frame 131, a pitch bearing housing 133, and a pitch joint bracket 134. The pitch bearing housing 133 is installed at both ends of the yaw motion frame 131, connecting to the pitch axis on the pitch motion platform 14, supporting the pitch motion platform 14, and connecting it to the yaw motion platform 13. The pitch joint bracket 134 is installed at the rear end of the yaw motion frame 131, connecting to the pitch fisheye joint 147 of the pitch drive electric cylinder 145. The yaw drive motor 132 is installed inside the yaw motion frame 131. The yaw motion frame 131 includes a yaw frame portion and a yaw mounting plate. The yaw mounting plate is installed below the yaw frame portion, connecting and fixing the outer ring 135 of the yaw slewing bearing. The outer ring 135 of the yaw slewing bearing has mounting holes for connecting and fixing to the yaw mounting plate. The outer ring 135 and the inner ring 124 on the transverse motion platform 12 cooperate to form a yaw slewing bearing, which completes the yaw motion around the Z-axis.

[0040] In one embodiment of this invention, a roll shaft 152 is provided on the roll motion platform 15, and the roll shaft 152 is rotatably connected to the pitch motion platform 14. The roll drive mechanism includes two sets of roll drive electric cylinders 154. The cylinder body of the roll drive electric cylinder 154 is rotatably connected to the roll motion platform 15 via a roll spherical bearing, and the piston rod of the roll drive electric cylinder 154 is rotatably connected to the longitudinal motion platform 16 via a roll spherical joint. The two sets of roll drive electric cylinders 154 are respectively located on both sides of the center point of the roll motion platform 15 in the X-axis direction.

[0041] In one embodiment of this invention, the pitch motion platform 14 includes a pitch motion frame 141, a roll bearing housing 143, a pitch cylinder bracket 144, and a roll joint bracket 146. A pitch shaft 142 is mounted at both ends of the pitch motion frame 141, connecting the yaw motion platform 13 and supporting the pitch motion platform 14. Roll bearing housings 143 are mounted at both ends of the pitch motion frame 141, connecting and supporting the roll motion platform 15. The roll joint bracket 146 is mounted at the left end of the pitch motion frame 141 and connected to the roll fisheye joint of the roll drive cylinder 154. The pitch fisheye joint 147 of the pitch drive cylinder 145 is connected to the pitch joint bracket 134 on the yaw motion platform 13. The pitch cylinder bracket 144 is installed at the rear end of the pitch motion frame 141. Each pitch cylinder bracket 144 has two pitch fisheye bearings 148 mounted on it, and the two pitch fisheye bearings 148 are connected to the cylinder body of the pitch drive cylinder 145. Driven by the pitch drive cylinder 145, the pitch motion platform 14 performs pitch motion relative to the yaw motion platform 13 around the pitch axis 142.

[0042] In one embodiment of this invention, the pitch motion frame 141 may be welded from metal profiles, such as steel.

[0043] In one embodiment of this invention, the rolling motion platform 15 is provided with a longitudinal linear guide rail 157 extending along the Y-axis. The longitudinal motion platform 16 is slidably connected to the longitudinal linear guide rail 157 via a longitudinal slider assembly 162. The longitudinal drive mechanism includes two sets of longitudinal drive cylinders 156. The cylinder body of the longitudinal drive cylinder 156 is rotatably connected to the rolling motion platform 15 via a longitudinal fisheye bearing 159, and the piston rod of the longitudinal drive cylinder 156 is rotatably connected to the longitudinal motion platform 16 via a longitudinal fisheye joint 158. The two sets of longitudinal drive cylinders 156 are respectively located on both sides of the center point of the rolling motion platform 15 in the Y-axis direction.

[0044] In one embodiment of this invention, the roll motion platform 15 includes a roll motion frame 151, a roll electric cylinder bracket 153, and a longitudinal electric cylinder bracket 155. A roll shaft 152 is installed at both the front and rear ends of the roll motion frame 151, both facing rearward, supporting the roll motion platform 15 and connecting it to the pitch motion platform 14 to complete the roll motion. The roll spherical joint of the roll drive electric cylinder 154 is connected to the roll joint bracket 146 on the pitch motion platform 14. The roll electric cylinder bracket 153 is installed at the left end of the roll motion frame 151, and each roll electric cylinder bracket 153 is equipped with two roll spherical bearings, which are connected to the cylinder body of the roll drive electric cylinder 154. Driven by the roll drive electric cylinder 154, the roll motion platform 15 performs roll motion relative to the pitch motion platform 14 around the roll shaft 152. A longitudinal linear guide 157 is mounted at the front end of the roll motion frame 151 to connect to and support the longitudinal motion platform 16 and provide guidance for it. A longitudinal electric cylinder bracket 155 is mounted at the middle of the front end of the roll motion frame 151. Each longitudinal electric cylinder bracket 155 has two longitudinal fisheye bearings 159 mounted on it, and the cylinder body of the longitudinal drive electric cylinder 156 is mounted between the two longitudinal fisheye bearings 159. The longitudinal drive electric cylinder 156 drives the longitudinal motion platform 16, which moves along the longitudinal linear guide 157, achieving movement along the Y-axis.

[0045] In one embodiment of this invention, the rolling motion frame 151 may be welded from metal profiles, such as steel.

[0046] In one embodiment of this invention, the lifting motion platform 17 is provided with a lifting linear guide 172 extending along the Z-axis direction. The lifting linear guide 172 is slidably connected to the longitudinal motion platform 16 via a lifting slider assembly 163. The lifting drive mechanism includes a lifting drive electric cylinder 174. The cylinder body of the lifting drive electric cylinder 174 is rotatably connected to the lifting motion platform 17 via a lifting fisheye bearing 176, and the piston rod of the lifting drive electric cylinder 174 is rotatably connected to the longitudinal motion platform 16 via a lifting fisheye joint 175.

[0047] In one embodiment of this invention, the longitudinal motion platform 16 includes a longitudinal motion frame 161, a longitudinal joint bracket 164, and a lifting joint bracket 165. A longitudinal slider assembly 162 and a lifting slider assembly 163 are respectively installed at the front and rear ends of the longitudinal motion frame 161, thereby connecting the longitudinal motion platform 16 to the roll motion platform 15 and to the lifting motion platform 17, respectively, thus enabling the movement of the longitudinal motion platform 16 and the lifting motion platform 17. The longitudinal joint bracket 164 is installed at the rear end of the longitudinal motion frame 161 and is used to connect the longitudinal fisheye joint 158 ​​of the longitudinal drive cylinder 156. The lifting joint bracket 165 is installed above the longitudinal motion frame 161 and is used to connect the lifting fisheye joint 175 of the lifting drive cylinder 174.

[0048] In one embodiment of this invention, the longitudinal motion frame 161 may be welded from metal profiles, such as steel.

[0049] In one embodiment of this invention, the lifting platform 17 includes a lifting frame 171 and a lifting cylinder bracket 173. A lifting linear guide rail 172 is mounted at the rear end of the lifting frame 171 and connected to a lifting slider assembly 163 on the longitudinal platform 16, thus connecting the lifting platform 17 and the longitudinal platform 16, and enabling the lifting movement of the lifting platform 17. The lifting cylinder bracket 173 is mounted above the lifting platform 17, and two lifting spherical bearings 176 are mounted on the bracket. The cylinder body of the lifting drive cylinder 174 is mounted between the two lifting spherical bearings 176, and the lifting spherical joint 175 of the lifting drive cylinder 174 is connected to the lifting joint bracket 165 on the longitudinal platform 16. The lifting drive cylinder 174 drives the lifting platform 17 to move along the lifting linear guide rail 172, thereby achieving lifting movement along the Z-axis.

[0050] In one embodiment of this invention, the lifting frame 171 may be welded from metal profiles, such as steel.

[0051] In one embodiment of this example, the lifting platform 17 is provided with a windshield mounting plate 2, which is used for the installation of the windshield 3.

[0052] 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.

[0053] In one embodiment of this example, each electric cylinder may be a servo electric cylinder.

[0054] 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 yaw turntable bearing type twelve-degree-of-freedom wind shield displacement test bench, characterized in that, The device includes two symmetrically arranged motion assemblies with a spacing between them; each motion assembly includes a base, a lateral motion platform, a yaw motion platform, a pitch motion platform, a roll motion platform, a longitudinal motion platform, and a lifting motion platform connected in sequence, and there is a gap between the lifting motion platforms of the two motion assemblies for installing a windshield. The lateral motion platform is driven by a lateral drive mechanism and can move along the X-axis; The yaw motion platform is driven by a yaw drive mechanism and can rotate around the Z-axis; The pitch motion platform is driven by a pitch drive mechanism and can rotate around the Y-axis; The rolling motion platform is driven by a rolling drive mechanism and can rotate around the X-axis; The longitudinal motion platform is driven by a longitudinal drive mechanism and can move along the Y-axis; The lifting motion platform is driven by a lifting drive mechanism and can move around the Z-axis; The yaw drive mechanism includes a yaw slewing bearing and a yaw power unit. The lateral motion platform and the yaw motion platform are rotatably connected through the yaw slewing bearing, and the yaw power unit is used to drive the yaw motion platform to rotate.

2. The yaw turntable bearing type twelve-degree-of-freedom wind shield displacement test bench according to claim 1, characterized in that, The yaw slewing bearing includes an inner ring and an outer ring. The inner ring is fixedly connected to the lateral motion platform, and the outer ring is fixedly connected to the yaw motion platform. The inner ring is a gear ring. The yaw power device includes a yaw drive motor and a gear. The yaw drive motor is connected to the yaw motion platform, and the gear is coaxially fixedly connected to the output shaft of the yaw drive motor. The gear meshes with the gear ring.

3. The yaw turntable bearing type twelve-degree-of-freedom wind shield displacement test bench according to claim 2, characterized in that, The yaw drive motor is an electric motor.

4. The yaw turntable bearing twelve-degree-of-freedom wind shield displacement test bench according to claim 1, characterized in that, The base is provided with a transverse linear guide rail extending along the X-axis direction, and the transverse motion platform is slidably connected to the transverse linear guide rail through a transverse slider assembly; the transverse drive mechanism includes a transverse drive electric cylinder, the cylinder body of the transverse drive electric cylinder is rotatably connected to the base through a transverse fisheye bearing, and the piston rod of the transverse drive electric cylinder is rotatably connected to the transverse motion platform through a transverse fisheye joint.

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

6. The yaw turntable bearing twelve-degree-of-freedom wind shield 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 pitch motion platform through a pitch fisheye bearing, and the piston rod of the pitch drive electric cylinder is rotatably connected to the yaw motion platform through a pitch fisheye joint. The two sets of pitch drive electric cylinders are respectively located on both sides of the center point of the pitch motion platform in the Y-axis direction.

7. The yaw turntable bearing twelve-degree-of-freedom wind shield displacement test bench according to claim 1, characterized in that, The roll motion platform is equipped with a roll shaft, which is rotatably connected to the pitch motion platform. The roll drive mechanism includes two sets of roll drive electric cylinders. 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. The two sets of roll drive electric cylinders are respectively located on both sides of the center point of the roll motion platform in the X-axis direction.

8. The yaw turntable bearing twelve-degree-of-freedom wind shield displacement test bench according to claim 7, characterized in that, The rolling motion platform is 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 longitudinal drive mechanism includes two sets of longitudinal drive electric cylinders. The cylinder body of the longitudinal drive electric cylinder is rotatably connected to the rolling 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. The two sets of longitudinal drive electric cylinders are respectively located on both sides of the center point of the rolling motion platform in the Y-axis direction.

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

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

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