Test bench
By designing a test bench with a frame section and a multi-link linkage mechanical device, the problem of existing devices being unable to adjust the pitch angle and move and position was solved, thereby improving testing efficiency and making the device easier to use.
Patent Information
- Application Number
- CN202423296013.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing vehicle surround view system testing devices cannot easily adjust the pitch angle and position, resulting in a cumbersome testing process, excessive device size, and difficulties in transportation and deployment, thus affecting testing efficiency.
A test bench was designed, which includes a frame and a multi-link linkage mechanical device. The pitch angle between the main frame and the bottom frame is adjusted by a motor-driven lead screw and geometric linkage. Combined with telescopic rods and casters, it supports the flexible movement and folding storage of the device.
It enables precise angle adjustment between the main frame and the bottom frame, improves testing efficiency, simplifies the operation process, reduces transportation and setup difficulties, and adapts to multi-site testing needs.
Smart Images
Figure CN223727423U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to vehicle detection technical field especially relates to a test bench. BACKGROUND
[0002] Vehicle surround view system plays a vital role in the modern automobile field, it can effectively reduce the blind area of the driver, greatly improves the driving safety. In numerous performance evaluation indexes, image quality is undoubtedly the key item. At present, corresponding national mandatory standard is in the revision stage.
[0003] According to the latest revised national standard requirement, surround camera image test needs to be carried out in the road site, and big size test picture card (plane size is 2 meters * 2 meters) is used. The big size test picture card can more accurately simulate the actual scene, ensures the reliability of test result. Test picture card needs to be accurately and conveniently moved and installed angle adjustment through specific device, and its purpose is to make the picture card present the minimum image distortion in surround system. This is because image distortion can affect the accurate judgment of the driver to the surrounding environment, thereby reducing the driving safety. Therefore, in the test process, it needs to involve repeated adjustment, and the repeated confirmation of the personnel in the cabin, only in this way can the test requirement of surround camera be met.
[0004] However, due to the relatively new test requirement, there is a lack of corresponding mature device in the market at present. After investigation, it is found that the existing device has many problems, first, the pitch angle adjustable and mobile positioning can not be conveniently realized, which makes the test process become tedious and reduces the test efficiency. Secondly, the whole device does not have folding function, resulting in the device being too large in size, which can not meet the use requirement of convenient and rapid arrangement. In actual test, the test site needs to be frequently replaced, and the device that is too large in size not only has transportation difficulty, but also is very time-consuming to arrange, which seriously affects the test efficiency. UTILITY MODEL CONTENTS
[0005] In view of the above problems of prior art, the utility model provides a test bench, which is convenient to adjust the pitch angle and improves the test efficiency.
[0006] Specifically, the utility model provides a test bench for testing vehicle surround view system, comprising,
[0007] Frame part, including main frame and bottom frame, one side of the main frame and bottom frame is hinged, the main frame is used for carrying standard test picture card;
[0008] Multi-link mechanical device, including motor drive part, screw rod, geometric linkage, transmission shaft and connecting rod, the motor drive part is fixed on the bottom frame, the motor drive part is used for driving the rotation of the screw rod, the rotation of the screw rod drives the geometric linkage to act, one end of the connecting rod is connected with the transmission shaft, the other end is connected with the main frame, the geometric linkage is driven to the connecting rod through the transmission shaft, so as to adjust the pitch angle between the main frame and the bottom frame.
[0009] According to an embodiment of the utility model, the bottom frame is rectangular frame, be equipped with reinforcing column inside, be equipped with fixed block on the reinforcing column, the screw rod is screwed with the fixed block, the screw rod passes the fixed block and is connected with one end of the geometric linkage.
[0010] According to an embodiment of the utility model, one long side of the bottom frame is hinged with one side of the main frame, the length direction of the reinforcing column and screw rod is parallel, and is perpendicular to the length direction of the bottom frame, the length direction of the transmission shaft is perpendicular to the length direction of the reinforcing column and screw rod.
[0011] According to an embodiment of the utility model, the motor drive part is fixedly arranged on the reinforcing column, and the transmission shaft is fixed on the bottom frame and can rotate relative to the bottom frame under the driving of the geometric linkage.
[0012] According to an embodiment of the utility model, the motor drive part includes a mounting seat, a motor and a display device fixed on the mounting seat, the mounting seat is fixed on the reinforcing column, and the display device is used to display the pitch angle value between the main frame and the bottom frame.
[0013] According to an embodiment of the utility model, the motor drive part further includes a mobile power supply, the mobile power supply is fixedly arranged on the mounting seat, and the mobile power supply is used to supply power to the motor and the display device.
[0014] According to an embodiment of the utility model, the motor drive part further includes a controller, the controller is used to receive external instructions and drive the motor to rotate according to the external instructions.
[0015] The controller is further used to calculate the rotation angle of the output shaft of the drive motor, calculate the pitch angle value between the main frame and the bottom frame according to the rotation angle, and display the pitch angle value through the display device.
[0016] According to an embodiment of the utility model, the test bench further includes a telescopic rod, the bottom of the telescopic rod is arranged on the bottom frame, and the top of the telescopic rod is arranged on the main frame, and the telescopic rod is used to provide support for the main frame.
[0017] According to one embodiment of the utility model, the bottom frame is provided with universal wheels at the bottom.
[0018] According to one embodiment of the utility model, the frame part is a folding structure, and the main frame and the bottom frame are formed by a plurality of rectangular frames spliced through rotating joints.
[0019] The test bench provided by the utility model can meet the surround view camera image test, conveniently adjust the pitch angle between the main frame and the bottom frame through the multi-connecting-rod linkage mechanical device, is convenient to operate, and improves the test efficiency.
[0020] It should be understood that the above general description and the following detailed description of the utility model are exemplary and illustrative, and are intended to provide further explanation of the utility model as claimed in the claims. BRIEF DESCRIPTION OF DRAWINGS
[0021] The accompanying drawings are included to provide a further understanding of the utility model, and they are incorporated and constitute a part of the present application, the drawings show the embodiments of the utility model, and together with the present specification, play the role of explaining the principles of the utility model. In the drawings:
[0022] Figure 1 The structural schematic view of the test bench of one embodiment of the utility model is shown.
[0023] Figure 2 The structural schematic view of the test bench of one embodiment of the utility model at the pitch angle 60 ° is shown.
[0024] Figure 3 The perspective view of Figure 2 .
[0025] Figure 4 The structural schematic view of the test bench of one embodiment of the utility model at the pitch angle 20 ° is shown.
[0026] Figure 5 The perspective view of Figure 4 .
[0027] Figure 6 The structural schematic view of the multi-connecting-rod linkage mechanical device of one embodiment of the utility model is shown.
[0028] Figure 7 The perspective view of Figure 6 .
[0029] Figure 8 The partial enlarged schematic view of Figure 6 .
[0030] Figure 9 The structural schematic view of the frame part of one embodiment of the utility model is shown.
[0031] Figure 10 is Figure 9 a perspective view.
[0032] Wherein, the above figures include the following reference signs:
[0033] Test bench 100
[0034] Frame part 101
[0035] Multi-link linkage mechanism 102
[0036] Main frame 103
[0037] Bottom frame 104
[0038] Motor driving part 105
[0039] Lead screw 106
[0040] Geometric link 107
[0041] Transmission shaft 108
[0042] Link 109
[0043] Reinforcing column 110
[0044] Fixed block 111
[0045] Mounting seat 112
[0046] Motor 113
[0047] Display device 114
[0048] Mobile power supply 115
[0049] Controller 116
[0050] Telescopic rod 117
[0051] Universal wheel 118
[0052] Handle 119
[0053] Rotary joint 120 DETAILED DESCRIPTION
[0054] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.
[0055] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way limiting to the application and its applications or uses. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort fall within the scope of the present application.
[0056] It should be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular forms are intended to include the plural forms, unless the context clearly indicates otherwise, and it should be further understood that the terms "comprise" and / or "include" as used herein specify the presence of stated features, steps, operations, devices, components and / or combinations thereof.
[0057] Unless specifically stated otherwise, the relative arrangements of the components and steps illustrated in these embodiments and the numerical expressions and values set forth in the examples are not limiting. It should be understood that the various parts of the drawings are not necessarily drawn to scale, and that, for the purpose of convenience and clarity, not all components and steps can be shown in a given figure. Techniques, methods, and devices known to those of ordinary skill in the art can not be discussed in detail, but rather can be assumed to be known by those of ordinary skill in the art. In the examples shown and discussed herein, any specific values should be interpreted as merely illustrative and not as a limitation on the scope of the exemplary embodiments. Thus, other examples of the exemplary embodiments can have different values. It is noted that like references and labels can be used to denote like items throughout the drawings, and thus, once an item is defined in one drawing, it is not necessary to further discuss it in further drawings.
[0058] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are generally based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, without the opposite indication, these orientation words do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component.
[0059] For purposes of the description hereinafter, spatial relations terms are used, such as "above", "below", "upper", "lower", and the like, to describe the relative position of one element, or features, to another element, or feature, as the figure is configured. These spatial terms are used in the present disclosure to describe the relative position of one element, or feature, to another element, or feature, as the figure is configured. It is to be understood that the spatial terms are intended to encompass different orientations of the device in use or operation, in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, or rotated by 90°, or in another orientation, the spatial terms "above" and "below" are to be interpreted accordingly. Thus, for example, the term "above" can encompass both a position above and a position below. The device can be otherwise oriented (rotated 90° or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
[0060] In addition, it should be pointed out that the use of "first", "second" and the like words to limit parts, only for the convenience of the corresponding parts to distinguish, such as no other declaration, the above words have no special meaning, therefore can not be understood as limiting the scope of the application. In addition, although the terms used in the present application are selected from the commonly known and used terms, some terms mentioned in the specification of the present application may be selected by the applicant according to his or her judgment, and the detailed meaning of which is described in the relevant part of the description. In addition, the present application is required to be understood not only by the actual terms used, but also by the meaning contained in each term.
[0061] Figure 1 The structural schematic diagram of the test bench of one embodiment of the present application is shown. Figure 2 The structural schematic diagram of the test bench of one embodiment of the present application is shown. Figure 3 The structural schematic diagram of the test bench of one embodiment of the present application is shown. Figure 2 The structural schematic diagram of the test bench of one embodiment of the present application is shown. Figure 4 The structural schematic diagram of the test bench of one embodiment of the present application is shown. Figure 5 The structural schematic diagram of the test bench of one embodiment of the present application is shown. Figure 4 The structural schematic diagram of the test bench of one embodiment of the present application is shown. As shown in the figure, a test bench 100 for testing a vehicle surround view system mainly comprises a frame part 101 and a multi-link linkage mechanical device 102.
[0062] The frame part 101 includes a main frame 103 and a bottom frame 104, and the main frame 103 and the bottom frame 104 are hinged on one side. The main frame 103 is used to carry a standard test chart (not shown in the figure). The main function of the main frame 103 in the whole structure is to carry the standard test chart, so it needs to have enough strength and stability in design to ensure that it can safely and reliably support the standard test chart. In actual use, the size and structure of the main frame 103 will be designed according to the specifications of the standard test chart, so as to adapt to the test chart. The bottom frame 104 provides a basic support for the main frame 103, and through the hinged connection with the main frame 103, the main frame 103 can be rotated within a certain angle range, so as to conveniently adjust the angle and position of the standard test chart to meet the needs under different test conditions. This hinged design makes it convenient to adjust the pitch angle of the frame part 101, and is suitable for folding storage. Figure 2 The pitch angle of the frame part 101 of the test bench 100 in Figure 4 is 20°.
[0063] Figure 6 The structure diagram of the multi-link linkage mechanical device of one embodiment of the utility model is shown. Figure 7 is Figure 6 a perspective view. As shown in the figure, the multi-link linkage mechanical device 102 includes a motor drive part 105, a lead screw 106, a geometric linkage 107, a transmission shaft 108 and a linkage 109. In combination with Figure 1 and Figure 3 shown, the motor drive part 105 is fixed on the bottom frame 104, and the motor drive part 105 is used to drive the lead screw 106 to rotate. When the motor drive part 105 starts, enough power is generated to drive the lead screw 106 to rotate. The rotation of the lead screw 106 will further drive the geometric linkage 107 to act. One end of the linkage 109 is connected with the transmission shaft 108, and the other end is connected with the main frame 103. In this example, two linkages 109 are arranged at both ends of the transmission shaft 108. In the process of adjusting the pitch angle between the main frame 103 and the bottom frame 104, the geometric linkage 107 drives the linkage 109 through the transmission shaft 108. By accurately controlling the operation of the motor drive part 105, the rotation speed and direction of the lead screw 106 can be accurately controlled, and then the action amplitude and direction of the geometric linkage 107 can be accurately adjusted. With the help of the transmission shaft 108, the geometric linkage 107 transmits the motion to the linkage 109, so that the linkage 109 can drive the main frame 103 to adjust the pitch angle relative to the bottom frame 104.
[0064] In some examples, reference is made to Figure 3The bottom frame 104 is a rectangular frame, and a reinforcing column 110 is arranged inside the bottom frame 104. A fixed block 111 is arranged on the reinforcing column 110. The screw rod 106 is threadedly connected with the fixed block 111, and the screw rod 106 is connected with one end of the geometric connecting rod 107 through the fixed block 111. The bottom frame 104 is in a rectangular frame structure, which improves the stability and practicability of the lifting structure. The reinforcing column 110 is arranged inside the bottom frame 104 to improve the structural strength of the bottom frame 104, so that the bottom frame 104 can better bear the force from various directions. The fixed block 111 is arranged on the reinforcing column 110, and the fixed block 111 plays a role of reinforcing connection and support. The screw rod 106 is connected with the fixed block 111 in a threaded manner. On the one hand, the threaded connection can realize the accurate movement of the screw rod 106 in the fixed block 111, and the fixed block 111 has a guiding effect, so that the accurate displacement control of the screw rod 106 in the axial direction can be realized. On the other hand, the threaded connection has good self-locking performance, which can prevent the screw rod 106 from moving in an unintended manner to a certain extent. After the screw rod 106 passes through the fixed block 111, the screw rod 106 is connected with one end of the geometric connecting rod 107. This design makes the rotation of the screw rod 106 directly transmitted to the geometric connecting rod 107, so as to drive the geometric connecting rod 107 to move. By controlling the rotation of the screw rod 106, the motion state of the geometric connecting rod 107 can be accurately controlled, and then the accurate control of the entire multi-linkage mechanical device 102 can be realized.
[0065] In some examples, one long side of the bottom frame 104 is hingedly connected with one side of the main frame 103. The length direction of the reinforcing column 110 and the screw rod 106 is parallel to the length direction of the bottom frame 104. This layout makes the screw rod 106 move in a direction perpendicular to the length direction of the bottom frame 104 when the screw rod 106 rotates, so as to effectively transmit the power of the motor driving part 105 to the geometric connecting rod 107. At the same time, the length direction of the reinforcing column 110 is parallel to the length direction of the screw rod 106, which can better bear the force generated by the rotation of the screw rod 106 through the fixed block 111, so as to ensure the structural stability of the entire device. The length direction of the transmission shaft 108 is perpendicular to the length direction of the reinforcing column 110 and the screw rod 106. The perpendicular arrangement of the transmission shaft 108 makes the power transmission of the entire device more efficient and accurate, and can ensure the stability and precision of the main frame 103 when adjusting the pitch angle.
[0066] In some examples, the motor driving part 105 is fixedly arranged on the reinforcing column 110, and the transmission shaft 108 is fixed on the bottom frame 104 and can rotate relative to the bottom frame 104 under the driving of the geometric linkage 107. The reinforcing column 110 generally has high structural strength and stability, and can provide reliable support for the motor driving part 105 to ensure that the motor 113 will not shake or displace due to external interference during operation, so as to ensure that the motor 113 can stably output power to drive the screw rod 106 to rotate. The transmission shaft 108 can be fixed on the bottom frame 104 away from the hinged main frame 103 through a plurality of bearing seats, which makes the transmission shaft 108 have a stable basis during power transmission. At the same time, the transmission shaft 108 can rotate relative to the bottom frame 104 under the driving of the geometric linkage 107. When the geometric linkage 107 moves under the action of the motor driving part 105 and the screw rod 106, it can transmit power to the transmission shaft 108. Since the transmission shaft 108 has a fixed relationship with the bottom frame 104, it can rotate relative to the bottom frame 104 by taking the bottom frame 104 as a reference. This rotation can further drive the connecting rod 109 connected thereto to move, thereby adjusting the pitch angle of the main frame 103. The rotation characteristics of the transmission shaft 108 enable the entire multi-linkage mechanical device 102 to realize accurate angle adjustment and meet the requirements of the standard test chart angle under different test conditions.
[0067] Figure 8 is Figure 6 a partial enlarged schematic view. As shown in the figure, in some examples, the motor driving part 105 includes a mounting seat 112, and a motor 113 and a display device 114 fixed on the mounting seat 112. The mounting seat 112 is fixed on the reinforcing column 110 to ensure the stability of the motor 113 and the display device 114 during operation. The display device 114 is used to display the pitch angle value between the main frame 103 and the bottom frame 104. The motor 113 is connected with the screw rod 106 through an output shaft, and the motor 113 drives the screw rod 106 to rotate, thereby driving the geometric linkage 107 and other components to move and adjust the pitch angle of the main frame 103. During the test, the operator can intuitively understand the current pitch angle of the main frame 103 through the display device 114, so as to accurately adjust according to the actual needs. The accuracy and real-time performance of the display device 114 can help the operator better master the running state of the device and improve the efficiency and accuracy of the test. At the same time, the existence of the display device 114 also makes the operation of the entire device more convenient, reduces the operation difficulty and the possibility of errors.
[0068] In some examples, the motor driving part 105 further comprises a mobile power supply 115 fixedly arranged on the mounting seat 112, which is used to supply power to the motor 113 and the display device 114. By using the mobile power supply 115, it is not necessary to rely on fixed power sockets, and the device can be freely moved and used in different test sites, greatly improving the applicability and operability of the device. The mobile power supply 115 is fixed on the mounting seat 112, which can ensure that the connection between the mobile power supply 115 and the motor 113 and the display device 114 is more stable and reliable. During the operation or movement of the device, the stability of power supply will not be affected by the shaking or displacement of the mobile power supply 115, thereby ensuring the normal work of the motor 113 and the display device 114.
[0069] In some examples, the motor driving part 105 further comprises a controller 116, which is used to receive external instructions and drive the motor 113 to rotate according to the external instructions. The controller 116 is also used to calculate the rotation angle of the output shaft of the motor 113, calculate the pitch angle value between the main frame 103 and the bottom frame 104 according to the rotation angle, and display it through the display device 114. In actual application, the operator can send instructions to the controller 116 through external equipment, such as adjusting the pitch angle of the main frame 103 to a specific value, etc. After receiving these external instructions, the controller 116 can accurately drive the motor 113 to rotate according to the requirements of the instructions. The receiving function of such external instructions makes the operation of the whole device more flexible and convenient, and can be quickly adjusted according to different test requirements. At the same time, the controller 116 also has the function of calculating the rotation angle of the output shaft of the motor 113. Through the accurate calculation of the rotation angle of the output shaft of the motor 113, the controller 116 can further calculate the output distance of the lead screw 106, the rotation angle of the transmission shaft 108, and then calculate the pitch angle value between the main frame 103 and the bottom frame 104. This calculation process needs to consider many factors such as the transmission ratio of the motor 113 and the lead screw 106, the motion characteristics of the geometric connecting rod 107, etc., to ensure that the calculated pitch angle value is accurate and reliable. Finally, the controller 116 displays the calculated pitch angle value through the display device 114. The operator can real-time know the current pitch angle of the main frame 103, so as to make more accurate adjustment and control.
[0070] In some examples, the motor driving part 105 further comprises a remote controller for remotely operating the controller 116. The remote controller can be wirelessly connected to the controller 116 through a Wi-Fi module or a Bluetooth module. The operator in a safe area several meters or even tens of meters away from the device can issue precise instructions to the motor driving part 105 through the remote controller, thereby realizing the remote adjustment of the pitch angle between the main frame 103 and the bottom frame 104.
[0071] In some examples, referenceFigure 2 and Figure 3 The test bench 100 further comprises telescopic rods 117, the bottom of which is arranged on the bottom frame 104 and the top of which is arranged on the main frame 103, and the telescopic rods 117 are used to provide support for the main frame 103. In the embodiment, two air spring telescopic rods 117 are arranged on both sides of the free end of the main frame 103 and the bottom frame 104. As an example but not limitation, the test bench 100 can comprise more telescopic rods 117 to provide effective support for the main frame 103. In a conventional test scenario, the pitch angle of the main frame 103 needs to be frequently adjusted to adapt to diversified test conditions. When the angle is changed each time, the stress condition of the main frame 103 changes and the center of gravity also shifts. At this time, the telescopic rods 117 can provide reliable support force, which is conducive to the adjustment of the pitch angle, and can resist the additional load generated by the position change of the main frame 103, preventing the main frame 103 from shaking, deviating and other conditions that affect the test precision.
[0072] In some examples, universal wheels 118 are arranged at the bottom of the bottom frame 104. The universal wheels 118 have the ability of 360° omnidirectional rotation, so that the test bench 100 is convenient to move. Referring to Figure 3 A handle 119 is arranged on one side of the bottom frame 104. Whether in a spacious large test site or in a relatively cramped laboratory space, the operator only needs to pull the handle 119 to easily move the test bench 100 to the desired position with the help of the universal wheels 118. Moreover, the universal wheels 118 usually have a brake device, and when the test bench 100 is moved to the position, the operator steps on the brake to stably lock the wheels and fix the test bench 100. It is ensured that the test bench 100 will not be randomly displaced in the subsequent test process, so as to maintain the precision and stability of the test environment.
[0073] Figure 9 A structural schematic view of a frame part of an embodiment of the utility model is shown. Figure 10 is Figure 9 A perspective view. As shown in the figure, in some examples, the frame part 101 is a folding structure, and the main frame 103 and the bottom frame 104 are formed by a plurality of rectangular frames through rotating joints 120. The splicing structure makes the frame part 101 have high flexibility and portability. When daily storage or test site transfer is needed, each rectangular frame can smoothly rotate around the rotating joint 120, and folding is easily realized. The frame originally occupying a large space can be quickly compressed in volume, greatly facilitating storage and transportation.
[0074] As is apparent to those skilled in the art, various modifications and changes can be made to the above-described exemplary embodiments of the present application without departing from the spirit and scope of the present application. Therefore, it is intended that the present application cover modifications and changes as long as they come within the scope of the appended claims and their equivalents.
Claims
1. A test stand for testing a surround view system of a vehicle, characterized by The utility model relates to a kind of standard test card holder, including, Frame part, including main frame and bottom frame, one side of the main frame and bottom frame is hinged, the main frame is used to carry standard test card; Multi-linkage mechanical device, including motor drive part, screw rod, geometric linkage, transmission shaft and connecting rod, the motor drive part is fixed on the bottom frame, the motor drive part is used to drive the screw rod rotation, the screw rod drives the geometric linkage to act after rotation, one end of the connecting rod is connected with the transmission shaft, the other end is connected with the main frame, the geometric linkage is driven to the connecting rod by the transmission shaft, to adjust the pitch angle between the main frame and bottom frame.
2. The test bed of claim 1, wherein, The bottom frame is a rectangular frame, and a reinforcing column is arranged inside the rectangular frame. A fixing block is arranged on the reinforcing column. The screw rod is in threaded cooperation with the fixing block. The screw rod passes through the fixing block and is connected with one end of the geometric linkage.
3. The test bed of claim 2, wherein, One long side of the bottom frame is hinged with one side of the main frame. The length direction of the reinforcing column and the screw rod is parallel to the length direction of the bottom frame. The length direction of the transmission shaft is perpendicular to the length direction of the reinforcing column and the screw rod.
4. The test bed of claim 2, wherein, The motor drive part is fixedly arranged on the reinforcing column. The transmission shaft is fixed on the bottom frame and can rotate relative to the bottom frame under the driving of the geometric linkage.
5. The test bed of claim 2, wherein, The motor drive part includes a mounting seat, a motor and a display device fixed on the mounting seat. The mounting seat is fixed on the reinforcing column. The display device is used to display the pitch angle value between the main frame and the bottom frame.
6. The test bed of claim 5, wherein, The motor drive part further includes a mobile power supply. The mobile power supply is fixedly arranged on the mounting seat. The mobile power supply is used to supply power to the motor and the display device.
7. The test bed of claim 5, wherein, The motor drive part further includes a controller. The controller is used to receive external instructions and drive the motor to rotate according to the external instructions. The controller is further used to calculate the rotation angle of the output shaft of the motor, calculate the pitch angle value between the main frame and the bottom frame according to the rotation angle, and display the pitch angle value through the display device.
8. The test bed of claim 1, wherein, The utility model further includes an extension rod. The bottom of the extension rod is arranged on the bottom frame. The top of the extension rod is arranged on the main frame. The extension rod is used to provide support for the main frame.
9. The test bed of claim 1, wherein, Universal wheels are arranged at the bottom of the bottom frame.
10. The test bed of claim 1, wherein, The frame part is a folding structure. The main frame and the bottom frame are formed by a plurality of rectangular frames through rotating joints.