Pre-tightening force loading device

Abstract

The invention provides a pretightening force loading device, and relates to the technical field of spaceflight assistance, the device comprises a loading mechanism, a support frame and a hydraulic pump, the loading mechanism comprises a force sensor, at least two hydraulic cylinders, a first cross beam plate, a loading mounting plate, a screw pin, a positioning loading assembly and a fixing assembly, the loading installation plate is detachably laid above the supporting frame, the at least two hydraulic cylinders are evenly arranged at the two ends of the upper surface of the loading installation plate and connected with the hydraulic pump through hydraulic pipelines, the first cross beam plate is connected to the ends, away from the loading installation plate, of the at least two hydraulic cylinders, and the force sensor is installed on the first cross beam plate. The positioning loading assembly is arranged on the lower surface of the loading mounting plate and abuts against the upper surface of the main body part of the pressed product, the connecting end of the screw pin is connected with a pre-tightening rod of the pressed product, and the fixed end of the screw pin is connected with the force sensor through the fixing assembly. The pretightening device can automatically and safely load pretightening force and can move to the space where a pressed product is located.

Description

Technical Field

[0001] The present invention relates to the field of aerospace auxiliary technology, and in particular to a preload force loading device. Background Art

[0002] Before a satellite is launched, many components, such as solar panels, antennas, and gimbals, need to be pressed against the surface of the satellite to resist vibrations during the launch process. When the satellite reaches the predetermined orbit, these components are unlocked and released so that they can be unfolded and reach working condition.

[0003] In the prior art, torque wrenches or hydraulic tools are mainly used to manually load preload (compression force) on components. Although this can press the components against the surface of the star, torque wrenches and hydraulic tools cannot automatically complete the preload, which is time-consuming and labor-intensive. Moreover, when the preload reaches several tons or more than ten tons, it is difficult for torque wrenches and hydraulic tools to effectively load preload on components. In addition, some hydraulic tools are large in size and inconvenient to move, making it difficult to handle preload work in a small space. Summary of the invention

[0004] The present invention aims to solve at least one of the above problems.

[0005] In order to solve the above problems, the present invention provides a preload force loading device, including a loading mechanism, a support frame and a hydraulic pump, wherein the support frame and the hydraulic pump are both mounted on a device mounting plate, and the loading mechanism is mounted on the support frame. The loading mechanism includes a force sensor, at least two hydraulic cylinders, a first cross beam plate, a loading mounting plate, a screw pin, a positioning loading assembly and a fixing assembly, wherein the loading mounting plate is detachably laid on the top of the support frame, at least two hydraulic cylinders are evenly arranged at both ends of the upper surface of the loading mounting plate, and are connected to the hydraulic pump through a hydraulic pipeline, the first cross beam plate is connected to one end of at least two hydraulic cylinders away from the loading mounting plate, the force sensor is mounted on the first cross beam plate, the positioning loading assembly is arranged on the lower surface of the loading mounting plate, and abuts against the upper surface of the main body of the pressed product, and the force sensor, the first cross beam plate, the loading mounting plate and the positioning loading assembly are all provided with a through hole adapted to the screw pin at the center, the connecting end of the screw pin passes through each of the through holes and is connected to the preload rod of the pressed product, and the fixed end of the screw pin is connected to the force sensor through the fixing assembly.

[0006] Optionally, the positioning and loading assembly includes a torque loading sleeve, a load-bearing sleeve and a center positioning tool, the torque loading sleeve is sleeved on the connecting end of the screw pin, the load-bearing sleeve is sleeved on the torque loading sleeve, and the upper surface of the load-bearing sleeve is connected to the loading mounting plate, and the lower surface of the load-bearing sleeve abuts against the upper surface of the main body of the pressed product, the center positioning tool is sleeved on the load-bearing sleeve, and the upper surface of the center positioning tool is connected to the loading mounting plate, and the lower surface of the center positioning tool abuts against the upper surface of the main body of the pressed product.

[0007] Optionally, one end of the torque loading sleeve away from the pressed product is arranged between the first cross beam plate and the loading mounting plate, and is provided with a connection interface matching with a torque wrench.

[0008] Optionally, the fixing assembly includes a bearing nut, a ball head washer and a locking nut which are sequentially sleeved on the fixed end of the screw pin, the outer diameters of the bearing nut, the ball head washer and the locking nut decrease sequentially, and the lower surface of the bearing nut abuts against the upper surface of the force sensor.

[0009] Optionally, the preload force loading device further comprises a second cross beam plate, the second cross beam plate is laid between at least two of the hydraulic cylinders and the upper surface of the loading mounting plate, and a through hole adapted to the screw pin is opened at the center of the second cross beam plate.

[0010] Optionally, the preload force loading device further includes a pressure overflow protection module, and the pressure overflow protection module is arranged at one end of the hydraulic pipeline close to the hydraulic cylinder.

[0011] Optionally, the pressure overflow protection module includes a pressure overflow valve, which is arranged at one end of the hydraulic pipeline close to the hydraulic cylinder and is used to open when the pressure value of the hydraulic pipeline exceeds a pressure relief threshold.

[0012] Optionally, the preload force loading device further comprises a pressure gauge, and the pressure gauge is arranged at one end of the hydraulic pipeline close to the hydraulic pump.

[0013] Optionally, the preload force loading device further includes a shunt oil circuit block, and the shunt oil circuit block is arranged on the hydraulic pipeline.

[0014] Optionally, the preload force loading device further includes a monitoring module, and the monitoring module is electrically connected to the force sensor and the hydraulic pump respectively.

[0015] The beneficial effects of a preload force loading device of the present invention are:

[0016] The loading mounting plate of the loading mechanism is detachably laid on the upper surface of the support frame, so that the loading mechanism can be disassembled and moved to the space where the pressed product is located to load the preload force, thereby increasing the portability and flexibility of the device. The hydraulic cylinder, the first crossbeam plate and the force sensor are sequentially installed on the upper surface of the loading mounting plate, and the hydraulic cylinder is connected to the hydraulic pump through a hydraulic pipeline, so that the first crossbeam plate and the force sensor can automatically move in the direction away from the loading mounting plate under the action of the hydraulic cylinder, and then connected to the force sensor through the fixed end of the screw pin through the fixing assembly, and the connecting end of the screw pin sequentially passes through each through hole and is connected to the preload rod of the pressed product, and when the force sensor moves in the direction away from the loading mounting plate, the screw pin can be driven to automatically move in the direction away from the loading mounting plate, thereby pulling the preload rod of the pressed product upward to provide the tension required for loading the preload force of the pressed product, and automatically load the tension force on the pressed product. At this time, the pressed product has an overall upward movement tendency under the action of the preload rod, but since the positioning and loading assembly is arranged on the lower surface of the loading mounting plate and abuts against the upper surface of the main body of the pressed product, the upward movement tendency of the upper surface of the main body of the pressed product is blocked under the action of the positioning and loading assembly, that is, the positioning and loading assembly applies pressure to the upper surface of the main body of the pressed product. When the tension on the preload rod continues to increase, the pressure on the upper surface of the main body of the pressed product also continues to increase, thereby reaching the pressure required for loading the preload force, realizing automatic pressure loading on the pressed product, so as to complete the preload force loading of the pressed product, and the loading mechanism includes at least two hydraulic cylinders, which can complete the loading of a large number of levels of preload force, and is monitored by a force sensor to ensure the safe loading of the preload force and improve the stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a preload force loading device provided in an embodiment of the present invention;

[0018] Figure 2 One of the structural schematic diagrams of the loading mechanism provided by the embodiment of the present invention;

[0019] Figure 3 A second structural schematic diagram of a loading mechanism provided by an embodiment of the present invention;

[0020] Figure 4 A schematic diagram of the structure of a monitoring module provided in an embodiment of the present invention.

[0021] Description of reference numerals:

[0022] 1. Loading mechanism; 11. Force sensor; 12. Hydraulic cylinder; 13. First crossbeam; 14. Loading mounting plate; 15. Screw pin; 16. Positioning loading assembly; 161. Torque loading sleeve; 162. Load-bearing sleeve; 163. Center positioning tooling; 17. Fixing assembly; 171. Load-bearing nut; 172. Ball head gasket; 173. Locking nut; 18. Second crossbeam; 2. Support frame; 3. Hydraulic pump; 4. Device mounting plate; 5. Pressed product; 51. Preload rod; 52. First main body; 53. Second main body; 6. Overpressure protection module; 61. Overpressure valve; 7. Pressure gauge; 8. Diverter oil block; 9. Monitoring module; 91. Intelligent display controller; 92. Controller mounting seat; 93. Support rod; 94. Rotation locking screw; 95. Support base. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0024] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0025] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0026] In view of the problems existing in the above-mentioned related technologies, such as Figures 1 to 3As shown, a preload force loading device provided by an embodiment of the present invention comprises a loading mechanism 1, a support frame 2 and a hydraulic pump 3, wherein the support frame 2 and the hydraulic pump 3 are both mounted on a device mounting plate 4, the loading mechanism 1 is mounted on the support frame 2, the loading mechanism 1 comprises a force sensor 11, at least two hydraulic cylinders 12, a first cross beam plate 13, a loading mounting plate 14, a screw pin 15, a positioning loading assembly 16 and a fixing assembly 17, the loading mounting plate 14 is detachably laid on top of the support frame 2, at least two of the hydraulic cylinders 12 are evenly arranged at both ends of the upper surface of the loading mounting plate 14, and are connected to the hydraulic pump 3 through a hydraulic pipeline, the first The crossbeam plate 13 is connected to one end of at least two of the hydraulic cylinders 12 away from the loading mounting plate 14, the force sensor 11 is installed on the first crossbeam plate 13, the positioning and loading assembly 16 is arranged on the lower surface of the loading mounting plate 14, and abuts against the upper surface of the first main body 52 of the pressed product 5, and the force sensor 11, the first crossbeam plate 13, the loading mounting plate 14 and the positioning and loading assembly 16 are all provided with through holes adapted to the screw pin 15, the connecting end of the screw pin 15 passes through each of the through holes and is connected to the preload rod 51 of the pressed product 5, and the fixed end of the screw pin 15 is connected to the force sensor 11 through the fixing assembly 17.

[0027] It can be understood that the pressed product 5 includes a pre-tightening rod 51, a first main body 52 and a second main body 53, the first main body 52 and the pre-tightening rod 51 are threadedly connected, the pre-tightening rod 51 is arranged to pass through the central axis of the first main body 52, and the second main body 53 is below the first main body 52, and the end of the pre-tightening rod 51 away from the screw pin 15 is connected to the second main body 53, and the pre-tightening force loading device of this embodiment is used to apply a pre-tightening force to the pressed product 5 so that the first main body 52 and the second main body 53 are locked, that is, the pre-tightening rod 51 moves upward, pulls the second main body 53 close to the first main body 52, and locks the first main body 52 and the second main body 53 through the reaction force of the positioning loading assembly 16 on the first main body 52. ​​The pressed product 5 can be a component on a satellite, and after the satellite enters the space orbit, the first main body 52 and the second main body 53 are separated.

[0028] Specifically, the support frame 2 and the hydraulic pump 3 are both mounted on the device mounting plate 4, the loading mechanism 1 is mounted on the support frame 2, the support frame 2 is composed of a plurality of support rods, and the plurality of support rods are evenly erected on the device mounting plate 4, a threaded hole is provided at one end of the support rod connected to the loading mounting plate 14, and a through hole or a threaded hole is provided at the connection between the loading mounting plate 14 and the support rod, so that the loading mounting plate 14 can be detachably connected to the support frame 2 by bolts. The hydraulic pump 3 can be an electrically controlled hydraulic pump. Figures 2 to 3As shown, the loading mechanism 1 includes a force sensor 11, at least two hydraulic cylinders 12, a first cross beam plate 13, a loading mounting plate 14, a screw pin 15, a positioning loading assembly 16 and a fixing assembly 17. The at least two hydraulic cylinders 12 are evenly arranged at both ends of the upper surface of the loading mounting plate 14, and are connected to the hydraulic pump 3 through a hydraulic pipeline, so that the hydraulic cylinders 12 can be extended and retracted under the action of the hydraulic oil driven by the hydraulic pump 3, thereby providing a preload force. The first cross beam plate 13 completely covers the end of the at least two hydraulic cylinders 12 away from the loading mounting plate 14, that is, covers the upper ends of the at least two hydraulic cylinders 12, so as to transmit the preload force to the force sensor 11 installed on the first cross beam plate 13. The positioning loading assembly 16 is arranged on the lower surface of the loading mounting plate 14, and abuts against the upper surface of the first main body 52 of the pressed product 5. The force sensor 11, the first cross beam plate 13 and the center of the positioning and loading assembly 16 are all provided with a through hole adapted to the screw pin 15, so that the connecting end of the screw pin 15 is inserted through the through hole of the force sensor 11, and sequentially passes through other through holes to be connected with the preload rod 51 of the pressed product 5, and the fixed end of the screw pin 15 is connected to the force sensor 11 through the fixing assembly 17, the fixed end of the screw pin 15 is provided with an external thread, and the through hole wall of the force sensor 11 is provided with an internal thread adapted to the external thread, so that the fixed end of the screw pin 15 can be connected with the The force sensor 11 is threadedly connected and fixed by the fixing assembly 17, so that the force sensor 11 transmits the preload force to the screw pin 15. The connection end of the screw pin 15 is hollow inside and provided with an internal thread. The preload rod 51 is provided with a corresponding external thread. The connection end of the screw pin 15 can be threadedly connected with the preload rod 51 by screwing the screw pin 15, and under the action of the thread, the preload rod 51 is screwed into the connection end of the screw pin 15 until the thread is fully engaged, thereby transmitting the preload force to the preload rod 51 for preload loading. Exemplarily, the force sensor 11 can be a tension and pressure sensor.

[0029] When the preload force is loaded, the hydraulic cylinder 12 extends. Since the cylinder body of the hydraulic cylinder 12 is fixed on the upper surface of the loading mounting plate 14, the first cross beam plate 13 connected to the free end of the hydraulic cylinder 12 moves in a direction away from the loading mounting plate 14, that is, moves upward. Since the force sensor 11 is installed on the upper surface of the first cross beam plate 13, and the fixed end of the screw pin 15 is connected to the force sensor 11 through the fixing assembly 17, and the connecting end of the screw pin 15 is connected to the preload rod 51, the first cross beam plate 13 will move with the force sensor 11 when it moves, and the force sensor 11 will then move. The screw pin 15 is driven, thereby applying an upward pulling force to the preload rod 51. At this time, since the positioning and loading assembly 16 is arranged on the lower surface of the loading mounting plate 14 and abuts against the upper surface of the first main body 52 of the pressed product 5, the first main body 52 of the pressed product 5 cannot move upward with the screw pin 15. In other words, the positioning and loading assembly 16 applies a reaction force, i.e., pressure, to the first main body 52 of the pressed product 5. The preload force loading of the pressed product 5 can be completed by applying a pulling force to the preload rod 51 of the pressed product 5 and a pressure to the first main body 52 of the pressed product 5.

[0030] In this embodiment, the loading mounting plate 14 of the loading mechanism 1 is detachably laid on the upper surface of the supporting frame 2, so that the loading mechanism 1 can be disassembled and moved to the space where the pressed product 5 is located to load the preload force, thereby increasing the portability and flexibility of the device. The hydraulic cylinder 12, the first cross beam plate 13 and the force sensor 11 are sequentially mounted on the upper surface of the loading mounting plate 14, and the hydraulic cylinder 12 is connected to the hydraulic pump 3 through a hydraulic pipeline. The first cross beam plate 13 and the force sensor 11 can be automatically moved in a direction away from the loading mounting plate 14 under the action of the hydraulic cylinder 12, and then connected to the force sensor 11 through the fixed end of the screw pin 15 through the fixing assembly 17. The connecting end of the screw pin 15 passes through the through holes in sequence and is connected to the preload rod 51 of the pressed product 5. When the force sensor 11 moves in a direction away from the loading mounting plate 14, the screw pin 15 can be driven to automatically move in a direction away from the loading mounting plate 14, thereby pulling the preload rod 51 of the pressed product 5 upward to provide the tension required for loading the preload force of the pressed product 5, and automatically load the pressed product 5 with tension. At this time, the pressed product 5 has an overall upward movement tendency under the action of the preload rod 51, but since the positioning and loading assembly 16 is arranged on the lower surface of the loading mounting plate 14 and abuts against the upper surface of the first main body 52 of the pressed product 5, the upper surface of the first main body 52 of the pressed product 5 has an upward movement tendency blocked under the action of the positioning and loading assembly 16, that is, the positioning and loading assembly 16 applies pressure to the upper surface of the first main body 52 of the pressed product 5. When the tension on the preload rod 51 continues to increase, the pressure on the upper surface of the first main body 52 of the pressed product 5 also continues to increase, thereby reaching the pressure required for loading the preload force, realizing automatic pressure loading on the pressed product 5, so as to complete the preload force loading of the pressed product 5, and the loading mechanism 1 includes at least two hydraulic cylinders 12, which can complete the loading of a large number of levels of preload force, and is monitored by the force sensor 11 to ensure the safe loading of the preload force and improve the stability of the device.

[0031] Optionally, the positioning and loading assembly 16 includes a torque loading sleeve 161, a load-bearing sleeve 162 and a center positioning tool 163, the torque loading sleeve 161 is sleeved on the connecting end of the screw pin 15, the load-bearing sleeve 162 is sleeved on the torque loading sleeve 161, and the upper surface of the load-bearing sleeve 162 is connected to the loading mounting plate 14, the lower surface of the load-bearing sleeve 162 abuts against the upper surface of the first main body 52 of the pressed product 5, the center positioning tool 163 is sleeved on the load-bearing sleeve 162, and the upper surface of the center positioning tool 163 is connected to the loading mounting plate 14, and the lower surface of the center positioning tool 163 abuts against the upper surface of the first main body 52 of the pressed product 5.

[0032] Specifically, Figure 3As shown, the positioning and loading assembly 16 includes a torque loading sleeve 161, a load-bearing sleeve 162 and a center positioning tool 163. The torque loading sleeve 161, the load-bearing sleeve 162 and the center positioning tool 163 are all hollow sleeve structures. The torque loading sleeve 161 is sleeved on the connecting end of the screw pin 15 and moves with the screw pin 15. The load-bearing sleeve 162 is sleeved on the torque loading sleeve 161, and the upper surface of the load-bearing sleeve 162 can be connected to the loading mounting plate 14 by a nylon screw, and the lower surface of the load-bearing sleeve 162 abuts against the upper surface of the first main body 52 of the pressed product 5. The center positioning tool 163 is sleeved on the load-bearing sleeve 162, and the upper surface of the center positioning tool 163 is connected to the loading mounting plate 14, and the lower surface of the center positioning tool 163 abuts against the upper surface of the first main body 52 of the pressed product 5.

[0033] Optionally, the end of the torque loading sleeve 161 away from the pressed product 5 is arranged between the first cross beam plate 13 and the loading mounting plate 14, and is provided with a connection interface matching with a torque wrench.

[0034] Specifically, Figure 2 As shown, the end of the torque loading sleeve 161 away from the pressed product 5 is arranged between the first crossbeam plate 13 and the loading mounting plate 14, and is provided with a connecting interface matching the torque wrench. The lower surface of the torque loading sleeve 161 is provided with a hexagonal groove, and the top of the preload rod 51 corresponding to the lower surface of the torque loading sleeve 161 is in the shape of a hexagonal nut. The hexagonal groove of the torque loading sleeve 161 is engaged with the hexagonal nut of the preload rod 51. After the loading of the hydraulic cylinder 12 is completed, it can be connected to the connecting interface of the torque loading sleeve 161 through a matching torque wrench, and the torque loading sleeve 161 is screwed by the torque wrench. The torque loading sleeve 161 rotates to tighten the preload rod 51 to complete the final preload force loading.

[0035] Optionally, the fixing assembly 17 includes a bearing nut 171, a ball head washer 172 and a locking nut 173 which are sequentially sleeved on the fixed end of the screw pin 15, the outer diameters of the bearing nut 171, the ball head washer 172 and the locking nut 173 are successively reduced, and the lower surface of the bearing nut 171 abuts against the upper surface of the force sensor 11.

[0036] Specifically, Figure 3As shown, the fixing assembly 17 includes a bearing nut 171, a ball head gasket 172 and a locking nut 173 which are sequentially sleeved on the fixed end of the screw pin 15. The outer diameters of the bearing nut 171, the ball head gasket 172 and the locking nut 173 decrease sequentially, and the thicknesses of the bearing nut 171 and the locking nut 173 are relatively large, and the lower surface of the bearing nut 171 abuts against the upper surface of the force sensor 11. After the connecting end of the screw pin 15 is inserted into the through hole of the force sensor 11 and sequentially passes through the other through holes to be connected with the preload rod 51 of the pressed product 5, the bearing nut 171, the ball head gasket 172 and the locking nut 173 are sequentially installed on the fixed end of the screw pin 15, and the locking nut 173 is screwed to lock the fixed end of the screw pin 15 with the force sensor 11, thereby transmitting the preload force.

[0037] Optionally, the preload loading device further comprises a second cross beam plate 18 , which is laid between at least two of the hydraulic cylinders 12 and the upper surface of the loading mounting plate 14 , and a through hole adapted to the screw pin 15 is opened at the center of the second cross beam plate 18 .

[0038] Specifically, Figure 2 and Figure 3 As shown, the preload loading device also includes a second cross beam plate 18, which is laid between at least two hydraulic cylinders 12 and the upper surface of the loading mounting plate 14 to increase the force-bearing area of ​​the loading mounting plate 14, thereby protecting the loading mounting plate 14 and extending the life of the loading mounting plate 14. A through hole adapted to the screw pin 15 is opened in the center of the second cross beam plate 18 so that the screw pin 15 can pass through.

[0039] Optionally, the preload force loading device further includes an overpressure protection module 6 , and the overpressure protection module 6 is disposed at one end of the hydraulic pipeline close to the hydraulic cylinder 12 .

[0040] Specifically, Figure 1 As shown, the preload force loading device further includes an overpressure protection module 6, which is arranged at one end of the hydraulic pipeline close to the hydraulic cylinder 12. When the preload force exceeds the preset upper pressure limit, the overpressure protection module is activated, and even if the hydraulic pump 3 continues to pressurize, the pressure in the hydraulic pipeline will not exceed the preset upper pressure limit. The preset upper pressure limit can be adjusted according to the actual needs of the pressed product 5.

[0041] Optionally, the pressure relief protection module 6 includes a pressure relief valve 61 , which is disposed at one end of the hydraulic pipeline close to the hydraulic cylinder 12 and is configured to open when the pressure value of the hydraulic pipeline exceeds a pressure relief threshold.

[0042] Specifically, Figure 1As shown, the overflow protection module 6 includes a pressure relief valve 61, which is arranged at one end of the hydraulic pipeline close to the hydraulic cylinder 12, and is used to open when the pressure value of the hydraulic pipeline exceeds the pressure relief threshold to relieve the pressure of the hydraulic pipeline to ensure the safety of loading.

[0043] Optionally, the preload force loading device further includes a pressure gauge 7 , and the pressure gauge 7 is disposed at one end of the hydraulic pipeline close to the hydraulic pump 3 .

[0044] Specifically, Figure 1 As shown, the preload force loading device further includes a pressure gauge 7, which is disposed at one end of the hydraulic pipeline close to the hydraulic pump 3 and is used to detect the pressure of the hydraulic pipeline.

[0045] Optionally, the preload force loading device further includes a flow-dividing oil circuit block 8, and the flow-dividing oil circuit block 8 is arranged on the hydraulic pipeline.

[0046] Specifically, Figure 1 As shown, the preload force loading device also includes a shunt oil block 8, which is arranged on the hydraulic pipeline, and the number of shunt oil blocks 8 can be set according to actual conditions. The shunt oil block can evenly distribute the pressure of the hydraulic pipeline to multiple branches, ensuring that the loading force of each hydraulic cylinder is consistent, and improving the loading accuracy and reliability.

[0047] In one embodiment, multiple hydraulic quick-connect interfaces are distributed in the hydraulic pipeline to meet the loading requirements of multiple loading devices. The hydraulic pipelines of various loading devices can be easily connected and disconnected, thereby improving the flexibility and maintainability of the device.

[0048] Optionally, the preload force loading device further includes a monitoring module 9 , and the monitoring module 9 is electrically connected to the force sensor 11 and the hydraulic pump 3 , respectively.

[0049] Specifically, Figure 1 As shown, the preload loading device also includes a monitoring module 9, which is electrically connected to the force sensor 11. The monitoring module 9 monitors the preload in real time and displays the preload value result. The monitoring module 9 can control the hydraulic pump 3 to perform preload fine-tuning operation according to the obtained preload value result to meet different loading force requirements.

[0050] In one embodiment, the monitoring module 9 includes an intelligent display controller 91, a controller mounting seat 92, a support rod 93, a rotation locking screw 94 and a support base 95. The intelligent display controller 91 is electrically connected to the force sensor 11 and the hydraulic pump 3 respectively, monitors the preload in real time and displays the preload value result, and can cooperate with the hydraulic pump 3 to perform preload fine-tuning operation to meet different loading force requirements. The intelligent display controller 91 is installed on the controller mounting seat 92, the controller mounting seat 92 is connected to one end of the support rod 93, and the controller mounting seat 92 can rotate based on one end of the support rod 93, the other end of the support rod 93 is connected to the support base 95, and the support base 95 is fixedly installed on the device mounting plate 4, and the rotation locking screw 94 is provided on the support rod 93, which is used to switch the rotation function of the controller mounting seat 92.

[0051] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A preload loading device, characterized in that: The invention comprises a loading mechanism (1), a support frame (2) and a hydraulic pump (3), wherein the support frame (2) and the hydraulic pump (3) are both mounted on a device mounting plate (4), the loading mechanism (1) is mounted on the support frame (2), the loading mechanism (1) comprises a force sensor (11), at least two hydraulic cylinders (12), a first cross beam plate (13), a loading mounting plate (14), a screw pin (15), a positioning loading assembly (16) and a fixing assembly (17), the loading mounting plate (14) is detachably laid on top of the support frame (2), at least two hydraulic cylinders (12) are evenly arranged at both ends of the upper surface of the loading mounting plate (14), and are connected to the hydraulic pump (3) through a hydraulic pipeline, the first cross beam plate (13) is connected to the loading mounting plate (14), and the loading mounting plate (14) is connected to the loading mounting plate (14). The force sensor (11) is connected to one end of at least two of the hydraulic cylinders (12) away from the loading mounting plate (14), the force sensor (11) is installed on the first cross beam plate (13), the positioning loading assembly (16) is arranged on the lower surface of the loading mounting plate (14) and abuts against the upper surface of the main body of the pressed product (5), and the centers of the force sensor (11), the first cross beam plate (13), the loading mounting plate (14) and the positioning loading assembly (16) are all provided with through holes adapted to the screw pin (15), the connecting end of the screw pin (15) passes through each of the through holes and is connected to the preload rod (51) of the pressed product (5), and the fixed end of the screw pin (15) is connected to the force sensor (11) through the fixing assembly (17).

2. The preload force loading device according to claim 1, characterized in that: The positioning and loading assembly (16) comprises a torque loading sleeve (161), a load-bearing sleeve (162) and a center positioning tool (163); the torque loading sleeve (161) is sleeved on the connecting end of the screw pin (15); the load-bearing sleeve (162) is sleeved on the torque loading sleeve (161), and the upper surface of the load-bearing sleeve (162) is connected to the loading mounting plate (14); the lower surface of the load-bearing sleeve (162) abuts against the upper surface of the main body of the pressed product (5); the center positioning tool (163) is sleeved on the load-bearing sleeve (162), and the upper surface of the center positioning tool (163) is connected to the loading mounting plate (14); the lower surface of the center positioning tool (163) abuts against the upper surface of the main body of the pressed product (5).

3. The preload force loading device according to claim 2, characterized in that: One end of the torque loading sleeve (161) away from the pressed product (5) is arranged between the first cross beam plate (13) and the loading mounting plate (14), and is provided with a connection interface matching a torque wrench.

4. The preload force loading device according to claim 1, characterized in that: The fixing assembly (17) comprises a bearing nut (171), a ball head washer (172) and a locking nut (173) which are sequentially sleeved on the fixing end of the screw pin (15); the outer diameters of the bearing nut (171), the ball head washer (172) and the locking nut (173) decrease sequentially, and the lower surface of the bearing nut (171) abuts against the upper surface of the force sensor (11).

5. The preload force loading device according to claim 1, characterized in that: It also includes a second cross beam plate (18), which is laid between at least two of the hydraulic cylinders (12) and the upper surface of the loading mounting plate (14), and a through hole adapted to the screw pin (15) is opened at the center of the second cross beam plate (18).

6. The preload force loading device according to claim 1, characterized in that: It also comprises an overpressure protection module (6), wherein the overpressure protection module (6) is arranged at one end of the hydraulic pipeline close to the hydraulic cylinder (12).

7. The preload force loading device according to claim 6, characterized in that: The pressure relief protection module (6) comprises a pressure relief valve (61), which is arranged at one end of the hydraulic pipeline close to the hydraulic cylinder (12) and is used to open when the pressure value of the hydraulic pipeline exceeds a pressure relief threshold.

8. The preload force loading device according to claim 1, characterized in that: It also includes a pressure gauge (7), which is arranged at one end of the hydraulic pipeline close to the hydraulic pump (3).

9. The preload force loading device according to claim 1, characterized in that: It also includes a flow-dividing oil circuit block (8), and the flow-dividing oil circuit block (8) is arranged on the hydraulic pipeline.

10. The preload force loading device according to any one of claims 1 to 9, characterized in that: It also includes a monitoring module (9), which is electrically connected to the force sensor (11) and the hydraulic pump (3) respectively.

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