Jacking mechanism for tested driving assembly of off-line test board
By designing a test drive assembly top pressure mechanism including a top pressure bracket, a servo cylinder and a multi-directional sideways mechanism on the downline test bench, a single clamping method for the tested powertrain in the prior art is solved. The problem is that the stable down-pressure and fixation of the test assembly is achieved for larger weight and longer length, extending the service life of the servo cylinder.
Patent Information
- Application Number
- CN202421184776.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-05-28
AI Technical Summary
The clamping positioning method of the measured powertrain in the existing offline test bench is relatively simple, and there is a lack of a compression device that can press down the measured powertrain, making it difficult to adapt to the measured total with larger weight and longer length. become.
A test drive assembly top pressure mechanism of the downline test bench is designed, including a top pressure bracket, a servo cylinder and a multi-directional sideways shift mechanism. The servo electric cylinder moves up and down through the screw, and adjusts the four azimuth position of the multi-directional sideways mechanism to achieve downward pressure and positioning of the four-point position of the assembly under test.
Through the design of the top pressure mechanism, the powertrain to be tested can be effectively clamped up and down, adapted to different models and shapes of the test assembly, and extended the service life of the servo cylinder by dispersing the reaction force.
Smart Images
Figure CN222439134U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of automobile starting assembly testing, in particular to a top pressing mechanism of a tested driving assembly of an offline test bench. Background Art
[0002] Hybrid transmission assembly, electric drive powertrain, and reducer are key components in the vehicle transmission system. The vehicle manufacturer has high requirements for their performance and reliability. Accurately measuring the performance data of the powertrain is the basis for ensuring the continuous optimization of the transmission design during the development process. Therefore, during the development of the powertrain, the powertrain bench test with various types of performance tests is an indispensable and important link.
[0003] In recent years, with the rapid development of new energy vehicles, the gearboxes that match their powertrains have shown a trend of high speed development, and various structural forms of powertrains have also emerged in an endless stream. At present, when conducting off-line testing on the powertrain, the assembly to be tested must first be transported to the tested station through a conveying platform, and then the assembly to be tested must be clamped and fixed on the tested station through the wall panels or clamping devices on both sides of the tested station, and then the assembly to be tested is docked with the dynamometer or drive motor, and then tested according to the program settings. The clamping method of the assembly to be tested on the above-mentioned off-line test bench is relatively simple, and is not suitable for some assemblies to be tested that are heavier and longer. In response to the above-mentioned problems, the applicant intends to improve the clamping method of the assembly to be tested, and to press the assembly to be tested on the conveying platform by pressing down. However, there is no device in the existing off-line test bench that can press down and compact the assembly to be tested. Summary of the invention
[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide a pressing mechanism for a drive assembly under test of an offline test bench, so as to solve the problem that the clamping and positioning method for the assembly under test in the existing offline test bench is relatively single, and there is a lack of a clamping device that can press down the assembly under test.
[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0006] A pressure mechanism for a tested drive assembly of an offline test bench is installed on a bench base of the test bench, located above a conveying platform, and includes a pressure bracket, the pressure bracket includes a horizontally arranged mounting frame and four columns fixedly installed at the lower end of the mounting frame, a plurality of servo electric cylinders are arranged in the mounting frame, the servo electric cylinder includes a cylinder body and a lead screw with one end rotatably arranged in the cylinder body, one end of the lead screw is connected to a driving member in the cylinder body through a coupling, and the other end extends out of the cylinder body; each servo electric cylinder is vertically arranged and assembled on the mounting frame through a multi-directional lateral shift mechanism, the multi-directional lateral shift mechanism can drive the corresponding servo electric cylinder to translate forward, backward, left and right and position; the lead screw of each servo electric cylinder can move up and down along its axial direction and position under the drive of the corresponding driving member. In this way, after the top-pressing mechanism is installed directly on the base of the bench and above the conveying platform, the screw rods of each servo electric cylinder in the top-pressing mechanism can move up and down, so that after each screw rod moves down, it will abut against the assembly to be measured, and the assembly to be measured will be pressed against the assembly tray, thus clamping and fixing the assembly to be measured up and down. The top-pressing bracket can not only be used to install the servo electric cylinder, but also can disperse the reaction force generated after the downward pressure through the top-pressing bracket when the servo electric cylinder presses and positions the assembly to be measured, thereby ensuring the service life of the servo electric cylinder. Each servo electric cylinder is installed on the top-pressing bracket through a side-shifting mechanism. The multi-directional side-shifting mechanism can realize the position adjustment of the servo motor in four directions: front, back, left, and right. Therefore, according to the model and shape of the assembly to be measured, the position of the servo electric cylinder can be fine-tuned, so that after the screw rod moves down, the abutment position is flat, and the downward pressure is more stable.
[0007] Furthermore, a force transmission bracket is fixedly installed on the mounting frame of the top pressure bracket, and the force transmission bracket includes four force transmission vertical rods whose lower ends are fixedly connected to the mounting frame, and a top plate is provided at the upper ends of the four force transmission vertical rods, and a gap is provided between the top plate and each servo electric cylinder; each multi-directional lateral shift mechanism is connected to the cylinder body of the corresponding servo electric cylinder through an elastic part, and when the lead screw in each servo electric cylinder moves downward and abuts against the measured drive assembly, the cylinder body of each servo electric cylinder can move upward, and the upper end abuts against the top plate. In this way, the force transmission bracket is set up, after the lead screw of each servo electric cylinder moves downward and counteracts the assembly to be measured, the lead screw will be subjected to a reverse force from the assembly to be measured, and this reverse force will cause the top of the servo electric cylinder to move slightly upward after passing through the servo electric cylinder, thereby counteracting the top plate of the force transmission bracket. After the reaction force is transmitted to the top plate, it is transmitted to the force transmission vertical rod under the top plate, the mounting frame and the column of the top pressure bracket in turn, and finally transmitted to the base of the bench, thereby effectively reducing the force on the top pressure bracket. At the same time, after adopting the above structure, the servo electric cylinder can directly transmit the reaction force to the top plate, thereby effectively reducing the force on the servo electric cylinder and effectively improving the service life of the servo electric cylinder.
[0008] Furthermore, the installation frame is square, and there are four servo electric cylinders, which are respectively arranged corresponding to the four sides of the installation frame; the force transmission vertical rods are distributed in a rectangular shape along the inner side of the installation frame, and a guide slide rail is fixedly installed on each force transmission vertical rod, and a limit plate is fixed on the upper and lower ends of the guide slide rail, and a guide slider matched with the guide slide rail is fixedly installed on the cylinder body of each servo electric cylinder, and the guide slider can move up along the guide slide rail when the cylinder body of the servo electric cylinder moves up. In this way, when pressing down, the screw rods in the four servo electric cylinders move down respectively, so that the downward pressure of four points can be achieved, the measured assembly is subjected to balanced force, and the pressing is more stable. The set guide slide rail can ensure the orientation of the cylinder body in the servo electric cylinder, and at the same time, the limit plate can limit the sliding distance.
[0009] Further, the multi-directional lateral movement mechanism is composed of a left-right sliding mechanism and a front-back sliding mechanism, the front-back sliding mechanism is slidably mounted on the left-right sliding mechanism, including an upper mounting plate and an intermediate plate arranged parallel to the lower portion of the upper mounting plate, the end portion of the upper mounting plate is provided with a slot, which is clamped on the cylinder body of the corresponding servo electric cylinder; two first guide rails are provided at the lower end of the upper mounting plate along the length direction of the upper mounting plate, and two first slide grooves matching the first guide rails are provided at the upper end of the intermediate plate; the left-right sliding mechanism includes a lower mounting plate, two second guide rails are provided on the lower mounting plate along the length direction thereof, and two second slide grooves corresponding to the second guide rails are provided at the lower end of the intermediate plate. In this way, each servo electric cylinder can be horizontally moved through the left-right sliding mechanism to adjust the left-right position, and at the same time, can also be adjusted in the front-back position after moving in the front-back direction through the front-back sliding mechanism, so that in actual application, the pressing position of the corresponding servo electric cylinder can be adjusted according to the shape of the assembly to be measured, so as to ensure that each screw end can be pressed and matched with the assembly to be measured, and adapt to the pressing of different models of the assembly to be measured. The left and right sliding mechanisms and the front and rear sliding mechanisms slide by means of the cooperation of the slide grooves and the guide rails, and the sliding distance is controlled and the positioning after sliding is achieved by means of cylinder driving.
[0010] Furthermore, the elastic member is a spring, which is arranged vertically and sleeved on a positioning pin; an L-shaped connecting plate is fixed on the cylinder body of each servo electric cylinder, and the positioning pin passes through the upper mounting plate and is fixed to the connecting plate. In this way, the installed positioning pin can be used for sleeve installation of the spring, and at the same time, the nail head part of the positioning pin can limit the spring, and can be compressed when the cylinder body moves up, and after the screw rod moves up, the cylinder body returns to the initial position under the action of the spring.
[0011] Furthermore, the upper mounting plate and the lower mounting plate are both moved by a screw drive mechanism, and the screw drive mechanism includes a drive motor fixedly mounted on the ends of the upper mounting plate and the lower mounting plate, a threaded rod is provided at the lower end of the upper mounting plate and the upper end of the lower mounting plate along the length direction thereof, and the output shaft of the drive motor is in transmission connection with the corresponding threaded rod; an adjustment nut matched with the threaded rod is also fixedly mounted on the lower mounting plate and the lower mounting plate. In this way, through the threaded matching of the threaded rod and the adjustment nut, the adjustment nut can be moved along the length direction of the threaded rod after the threaded rod is rotated, thereby realizing the position adjustment of the upper mounting plate and the lower mounting plate.
[0012] Furthermore, a driving pulley is sleeved on the output shaft of each driving motor, and a driven pulley is installed under the upper mounting plate and the lower mounting plate, and the driving pulley and the driven pulley are connected by a transmission belt; the threaded pull rod is sleeved and fixed on the driven pulley. In this way, the output shaft of the driving motor and the threaded pull rod are connected by a belt transmission mechanism to achieve power transmission, and the structure is stable and compact. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a structural schematic diagram of the top pressing mechanism of the driving assembly under test in the embodiment;
[0014] Figure 2 for Figure 1 A top view of
[0015] Figure 3 It is an enlarged three-dimensional structural schematic diagram of the servo electric cylinder and the multi-directional side shift mechanism in the embodiment;
[0016] Figure 4 for Figure 3 Side view of
[0017] Figure 5 for Figure 4 A schematic diagram of the enlarged structure of the middle part A;
[0018] Figure 6 for Figure 4 Top view of the . DETAILED DESCRIPTION
[0019] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.
[0020] It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In the description of the utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invention product is usually placed when used, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", etc. do not mean that the components are absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0021] like Figure 1-Figure 6As shown, the tested driving assembly pressing mechanism of the offline test bench provided in this embodiment is installed on the bench base of the test bench, located above the conveying platform, and includes a pressing bracket, the pressing bracket includes a horizontally arranged mounting frame 2 and four columns 1 fixedly installed at the lower end of the mounting frame 2, and a plurality of servo electric cylinders 5 are arranged in the mounting frame 2, the servo electric cylinder 5 includes a cylinder body 51 and a lead screw 52 with one end rotatably arranged in the cylinder body 51, one end of the lead screw 52 is connected to the driving member in the cylinder body 51 through a coupling, and the other end extends out of the cylinder body 51; each servo electric cylinder 5 is vertically arranged and assembled on the mounting frame 2 through a multi-directional lateral shifting mechanism 6, the multi-directional lateral shifting mechanism can drive the corresponding servo electric cylinder 5 to translate forward, backward, left and right and position; the lead screw 52 of each servo electric cylinder 5 can move up and down along its axial direction and position under the drive of the corresponding driving member. In this way, after the top-pressing mechanism is directly installed on the pedestal base and above the conveying platform, the screw rods 52 of each servo electric cylinder 5 in the top-pressing mechanism can move up and down, so that after each screw rod 52 moves down, it abuts against the assembly to be measured on the conveying platform, and the assembly to be measured is pressed against the assembly tray, so that the assembly to be measured is clamped and fixed up and down. The top-pressing bracket can not only be used to install the servo electric cylinder 5, but also can disperse the reaction force generated after the downward pressure through the top-pressing bracket when the servo electric cylinder 5 presses and positions the assembly to be measured, thereby ensuring the service life of the servo electric cylinder 5. Each servo electric cylinder 5 is installed on the top-pressing bracket through a side-shifting mechanism, and the multi-directional side-shifting mechanism 6 can realize the position adjustment of the servo motor in four directions: front, back, left, and right, so as to fine-tune the position of the servo electric cylinder 5 according to the model and shape of the assembly to be measured, so that after the screw rod 52 moves down, the abutting position is flat, and the downward pressure is more stable.
[0022] Furthermore, a force transmission bracket is fixedly installed on the mounting frame 2 of the top pressure bracket, and the force transmission bracket includes four force transmission vertical rods 3 whose lower ends are fixedly connected to the mounting frame 2, and a top plate 4 is provided at the upper ends of the four force transmission vertical rods 3, and there is a gap between the top plate 4 and each servo electric cylinder 5; each multi-directional lateral displacement mechanism 6 is connected to the cylinder body 51 of the corresponding servo electric cylinder 5 through an elastic member 9, and when the lead screw 52 in each servo electric cylinder 5 moves downward and abuts against the measured drive assembly, the cylinder body 51 of each servo electric cylinder 5 can move upward, and the upper end abuts against the top plate 4. In this way, the force transmission bracket is set up, after the lead screw 52 of each servo electric cylinder 5 moves downward and counteracts the measured assembly, the lead screw 52 will be subjected to a reverse force from the measured assembly, and this reverse force will cause the top of the servo electric cylinder 5 to move slightly upward after passing through the servo electric cylinder 5, thereby counteracting the top plate 4 of the force transmission bracket, and after the reaction force is transmitted to the top plate 4, it is transmitted to the force transmission vertical rod 3 under the top plate 4, the mounting frame 2 of the top pressure bracket, and the column 1 in turn, and finally transmitted to the stand base, thereby effectively reducing the force on the top pressure bracket. At the same time, after adopting the above structure, the servo electric cylinder 5 can directly transmit the reaction force to the top plate 4, thereby effectively reducing the force on the servo electric cylinder 5 and effectively improving the service life of the servo electric cylinder 5.
[0023] Furthermore, the multi-directional lateral movement mechanism is composed of a left-right sliding mechanism 7 and a front-back sliding mechanism 6. The front-back sliding mechanism 6 is slidably mounted on the left-right sliding mechanism 7, and includes an upper mounting plate 61 and an intermediate plate 62 arranged parallel to the upper mounting plate 61. A card slot is provided at the end of the upper mounting plate 61, which is clamped on the cylinder body 51 of the corresponding servo electric cylinder 5; two first guide rails 63 are provided at the lower end of the upper mounting plate 61 along the length direction of the upper mounting plate 61, and two first slide grooves 64 matching the first guide rails 63 are provided at the upper end of the intermediate plate 62; the left-right sliding mechanism 7 includes a lower mounting plate 71, and two second guide rails 72 are provided on the lower mounting plate 71 along its length direction, and two second slide grooves 65 corresponding to the second guide rails 72 are provided at the lower end of the intermediate plate 62. In this way, each servo electric cylinder 5 can move horizontally through the left and right sliding mechanism 7 to adjust the left and right position. At the same time, it can also adjust the front and rear position after moving in the front and rear direction through the front and rear sliding mechanism 6. Therefore, in practical applications, the pressing position of the corresponding servo electric cylinder 5 can be adjusted according to the shape of the assembly to be tested, so as to ensure that the end of each screw rod 52 can be pressed and matched with the assembly to be tested, and adapt to the pressing of different models of the assembly to be tested. The left and right sliding mechanism 7 and the front and rear sliding mechanism 6 slide by the combination of the slide groove and the guide rail, and the sliding distance is controlled by the cylinder drive, and the positioning after sliding is realized.
[0024] like Figure 1 , Figure 2As shown, the installation frame 2 in this embodiment is square, and there are four servo electric cylinders 5, which are respectively arranged corresponding to the four sides of the installation frame 2; the force transmission vertical rods 3 are distributed in a rectangular shape along the inner side of the installation frame 2, and a guide slide rail is fixedly installed on each force transmission vertical rod 3, and a limit plate is fixed at the upper and lower ends of the guide slide rail, and a guide slider matched with the guide slide rail is fixedly installed on the cylinder body 51 of each servo electric cylinder 5, and the guide slider can move up along the guide slide rail when the cylinder body 51 of the servo electric cylinder 5 moves up. In this way, when pressing down, the screw rods 52 in the four servo electric cylinders 5 move down respectively, so that the pressing of four points can be achieved, the measured assembly is subjected to balanced force, and the pressing is more stable. The set guide slide rail can ensure the orientation of the cylinder body 51 in the servo electric cylinder 5, and at the same time, the limit plate can limit the sliding distance.
[0025] Furthermore, the elastic member 9 is a spring, which is arranged vertically and sleeved on a positioning pin 10; an L-shaped connecting plate 53 is fixed on the cylinder body 51 of each servo electric cylinder 5, and the positioning pin 10 passes through the upper mounting plate 61 and is fixed to the connecting plate 53. In this way, the installed positioning pin 10 can be used for sleeve installation of the spring, and at the same time, the nail head part of the positioning pin 10 can limit the spring, and can be compressed when the cylinder body 51 moves up, and after the screw rod 52 moves up, the cylinder body 51 returns to the initial position under the action of the spring.
[0026] like Figure 3-Figure 6 As shown, the upper mounting plate 61 and the lower mounting plate 71 are both moved by a screw drive mechanism 8, and the screw drive mechanism 8 includes a drive motor 81 fixedly mounted on the ends of the upper mounting plate 61 and the lower mounting plate 71, and a threaded rod 82 is provided at the lower end of the upper mounting plate 61 and the upper end of the lower mounting plate 71 along the length direction thereof, and the output shaft of the drive motor 81 is transmission-connected with the corresponding threaded rod 82; an adjustment nut 83 matching with the threaded rod 82 is also fixedly mounted on the lower end of the upper mounting plate 61 and the lower mounting plate 71. In this way, through the threaded matching of the threaded rod 82 and the adjustment nut, the adjustment nut 83 can be moved along the length direction of the threaded rod 82 after the threaded rod 82 rotates, thereby realizing the position adjustment of the upper mounting plate 61 and the lower mounting plate 71.
[0027] Furthermore, a driving pulley is sleeved on the output shaft of each driving motor 81, and a driven pulley is installed under the upper mounting plate 61 and on the lower mounting plate 71. The driving pulley and the driven pulley are connected by a transmission belt; the threaded pull rod 82 is sleeved and fixed on the driven pulley. In this way, power transmission is realized between the output shaft of the driving motor 81 and the threaded pull rod 82 through a belt transmission mechanism, and the structure is stable and compact.
[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the technical solution. Ordinary technicians in this field should understand that those modifications or equivalent replacements of the technical solution of the utility model without departing from the purpose and scope of the technical solution of the utility model should be included in the scope of the claims of the utility model.
Claims
1. A tested drive assembly pressing mechanism of an offline test bench is installed on a test bench base and located above a conveying platform, characterized in that: It includes a top pressure bracket, which includes a horizontally arranged installation frame and four columns fixedly installed at the lower end of the installation frame. A plurality of servo electric cylinders are arranged in the installation frame. The servo electric cylinder includes a cylinder body and a screw rod with one end rotatably arranged in the cylinder body, one end of the screw rod is connected to a driving member in the cylinder body through a coupling, and the other end extends out of the cylinder body; each servo electric cylinder is vertically arranged and assembled on the installation frame through a multi-directional lateral shift mechanism, and the multi-directional lateral shift mechanism can drive the corresponding servo electric cylinder to translate forward, backward, left and right and position; the screw rod of each servo electric cylinder can move up and down and position along its axial direction under the drive of the corresponding driving member.
2. The tested drive assembly pressing mechanism of the offline test bench according to claim 1 is characterized in that: A force transmission bracket is also fixedly installed on the mounting frame of the top pressure bracket, and the force transmission bracket includes four force transmission vertical rods whose lower ends are fixedly connected to the mounting frame, and a top plate is provided at the upper ends of the four force transmission vertical rods, and a gap is provided between the top plate and each servo electric cylinder; each multi-directional lateral shift mechanism is connected to the cylinder body of the corresponding servo electric cylinder through an elastic part, and when the lead screw in each servo electric cylinder moves downward and abuts against the measured drive assembly, the cylinder body of each servo electric cylinder can move upward, and the upper end abuts against the top plate.
3. The tested drive assembly pressing mechanism of the offline test bench according to claim 2 is characterized in that: The installation frame is square, and four servo electric cylinders are provided, and the four servo electric cylinders are respectively arranged corresponding to the four sides of the installation frame; the force transmission vertical rods are distributed in a rectangular shape along the inner side of the installation frame, and a guide slide rail is fixedly installed on each force transmission vertical rod, and a limit plate is fixed at the upper and lower ends of the guide slide rail. A guide slider that cooperates with the guide slide rail is fixedly installed on the cylinder body of each servo electric cylinder, and the guide slider can move up along the guide slide rail when the cylinder body of the servo electric cylinder moves up.
4. The tested drive assembly pressing mechanism of the offline test bench according to claim 1, 2 or 3, characterized in that: The multi-directional lateral movement mechanism is composed of a left-right sliding mechanism and a front-back sliding mechanism. The front-back sliding mechanism is slidably installed on the left-right sliding mechanism, including an upper mounting plate and an intermediate plate arranged parallel to the lower portion of the upper mounting plate. A card slot is provided at the end of the upper mounting plate, which is clamped on the cylinder body of the corresponding servo electric cylinder; two first guide rails are provided at the lower end of the upper mounting plate along the length direction of the upper mounting plate, and two first slide grooves matching the first guide rails are provided at the upper end of the intermediate plate; the left-right sliding mechanism includes a lower mounting plate, two second guide rails are provided on the lower mounting plate along the length direction thereof, and two second slide grooves corresponding to the second guide rails are provided at the lower end of the intermediate plate.
5. The tested drive assembly pressing mechanism of the offline test bench according to claim 2 or 3, characterized in that: The elastic member is a spring, which is arranged vertically and sleeved on a positioning pin; an L-shaped connecting plate is fixed on the cylinder body of each servo electric cylinder, and the positioning pin is fixed to the connecting plate after passing through the upper mounting plate.
6. The tested drive assembly pressing mechanism of the offline test bench according to claim 4 is characterized in that: The upper mounting plate and the lower mounting plate are both moved by a screw drive mechanism, and the screw drive mechanism includes a drive motor fixedly mounted on the ends of the upper mounting plate and the lower mounting plate, and a threaded pull rod is provided along the length direction of the lower end of the upper mounting plate and the upper end of the lower mounting plate, and the output shaft of the drive motor is transmission-connected with the corresponding threaded pull rod; adjusting nuts matching the threaded pull rod are also fixedly mounted on the lower end of the upper mounting plate and the lower mounting plate.
7. The tested drive assembly pressing mechanism of the offline test bench according to claim 6 is characterized in that: A driving pulley is sleeved on the output shaft of each driving motor, and a driven pulley is installed under the upper mounting plate and the lower mounting plate. The driving pulley and the driven pulley are connected by a transmission belt; the threaded pull rod is sleeved and fixed on the driven pulley.