An electromagnetic loading testing device suitable for tension, torsion, and shear.

Abstract

This invention discloses an electromagnetic loading testing device suitable for tension, torsion, and shear testing in the field of experimental equipment technology. It includes a base, a bidirectional lead screw pair, a clamping block, a first electric bolt lock, a hollow column, an electric clamp, a drive plate, a telescopic rotation device, a coil, a first gear, a rack, a second electric bolt lock, a rotating plate, a mounting ring, a stop block, and a crossbar. The coil's up-and-down movement and rightward outward movement cause the upper and lower drive plates to be compressed upwards and pushed downwards. The upper drive plate can be horizontally pushed after rotating to the right. The rack drives the first gear to rotate, thus rotating the electric clamp. This causes the rod between the clamping block and the electric clamp to be compressed, stretched, and torsiond. The thrust provided by the coil is adjusted by controlling the voltage. Strain gauges are attached to the rod to conduct the test. This device uses electromagnetic loading as a power source, has a compact structure, is easy to operate, and is innovative.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, specifically to an electromagnetic loading testing device suitable for tension, torsion, and shear tests. Background Technology

[0002] High-strength bolts have become an efficient connection method for main load-bearing structures in the aerospace field. In aerospace manufacturing, the smooth shank of a high-strength bolt not only increases the connection performance of bolted structures but also improves the stress distribution and fatigue performance of the hole wall through appropriate interference fit. After the bolt shank is driven into the hole wall of the connection structure, the actual stress situation under the influence of interference is very complex. The bolted area of ​​the connection structure is simultaneously subjected to one or more combinations of forces such as shear, tension, and torsion. Studying the actual stress situation of the bolt shank in the hole wall is essential for the selection of bolt fasteners and the design of joint dimensions for main load-bearing structures. This can be extended to the stress testing of bolt fasteners after manufacturing, enabling them to be used in different applications. However, current bolt fastener stress testing devices mainly rely on hydraulic devices to complete tensile, compressive, and torsional tests. As a power source, the hydraulic device is bulky and not conducive to handling and installation; it also increases the overall size of the equipment and the floor space required. Based on this, this invention designs an electromagnetic loading testing device suitable for tension, torsion, and shear tests to solve the above problems. Summary of the Invention

[0003] The purpose of this invention is to provide an electromagnetic loading test device suitable for tension, torsion and shear tests, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an electromagnetic loading test device suitable for tension, torsion, and shear tests, comprising a base, with support columns fixed at the center of both sides of the upper surface of the base, a circular perforated plate horizontally fixed between the tops of the two support columns, an electric push rod vertically fixed at the center of both sides of the upper surface of the circular perforated plate, a top plate horizontally fixed between the tops of the two electric push rods, a bidirectional lead screw pair rotatably mounted on the lower surface of the top plate, clamping blocks fixed at the bottom of the moving blocks on both sides of the bidirectional lead screw pair, a moving column slidably inserted into the circular perforated plate, a pair of first electric locks symmetrically inserted laterally into the inner wall of the circular perforated plate, the outer ends of the pins of the first electric locks being connected to the outer wall of the moving column via a slider-slide groove assembly, a hollow column rotatably mounted on the vertical axis of the moving column, an electric clamp fixed at the top of the hollow column, a pair of manual telescopic rods symmetrically screwed vertically to the center of both sides of the bottom of the moving column, a support plate fixed between the bottoms of the two manual telescopic rods, and a clamp mounted on the upper surface of the support plate and the bottom of the moving column. A one-way lead screw pair is horizontally rotatably installed between the rear sides of the two supporting columns via a fixed side plate. A telescopic rotating device is horizontally installed in front of the moving block of the one-way lead screw pair. A connecting plate is installed at the front end of the telescopic rotating device, and a coil is fixed on the upper surface of the connecting plate. The coil is connected to the mains power through a coil power supply system. A circular groove is provided at the bottom of the moving column. A first gear is fixedly sleeved at the end of the hollow column. A rack is horizontally engaged with the outer side of the first gear and slides against the inner wall of the circular groove. The inner wall of the circular groove is slidably engaged with an inverted T-shaped block extending to the circumference. The outer end of the inverted T-shaped block is inserted into a second electric bolt lock through a stepped blind hole. A rotating shaft is rotatably mounted on the upper part of the inner wall of the stepped blind hole via a torsion spring. A rotating plate is fixed to the outer side of the rotating shaft. A mounting ring is fixed to the outer end of the rotating plate. The drive plate is coaxially embedded in the surface of the mounting ring. A stop block is fixed to the outer end of the pin of the second electric bolt lock, which is inserted into the rotating shaft through the blind hole. A crossbar is fixed to the outer side of the inverted T-shaped block. The outer wall of the crossbar is connected to the end of the rack.

[0005] Preferably, the coil power supply system includes a switch K1 connected in series with one end of the low-voltage AC power supply, a resistor R1 connected in series with the other end of the switch K1, an adjustable transformer T connected in series with the other end of the resistor R1, the other end of the primary winding of the adjustable transformer T connected in series with the other end of the low-voltage AC power supply, one end of the secondary winding of the adjustable transformer T grounded, and the other end connected in series with a rectifier D1 and a resistor R2, the other end of the resistor R2 connected in parallel with one end of the coil and a capacitor bank C1, the other end of the capacitor bank C1 connected in series with a switch K2, and the other end of the switch K2 connected in parallel with a ground wire and the other end of the coil.

[0006] Preferably, a first telescopic square tube section is vertically and rotatably mounted on the upper surface of the base parallel to the support column. An L-shaped plate is mounted between the upper outer wall of the first telescopic square tube section and the outer wall of the lead screw of the bidirectional lead screw pair via a bearing. The outer end of the lead screw of the bidirectional lead screw pair and the top end of the first telescopic square tube section are connected via a bevel gear pair. A first forward and reverse motor is mounted on the rear right side of the upper surface of the base. A worm gear assembly is mounted between the bottom of the outer wall of the first telescopic square tube section and the upper surface of the base via a bearing seat. A third electric lock is installed between the first forward and reverse motor and the worm of the worm gear assembly. A first conical friction wheel pair is installed between the outer end of the motor shaft of the first forward and reverse motor, the outer end of the pin of the third electric lock, and the end of the worm. The conical friction wheel of the first conical friction wheel pair is rotatably sleeved with the pin of the third electric lock, and the rest are fixedly sleeved.

[0007] Preferably, a first drive shaft parallel to the motor shaft is mounted on the rear side of the first reversible motor via a bearing housing. The outer wall of the first drive shaft is connected to the outer end of the one-way lead screw pair via a first sprocket and chain assembly. A fourth electric lock is horizontally mounted between the first drive shaft and the motor shaft. The outer end of the first drive shaft, the outer end of the motor shaft of the first reversible motor, and the outer end of the pin of the fourth electric lock are also connected via a first conical friction wheel pair. The conical friction wheel of the first conical friction wheel pair is rotatably sleeved with the pin of the fourth electric lock, while the rest are fixedly sleeved.

[0008] Preferably, a light shaft is horizontally fixed to the rear side of the fixed side plate of the unidirectional lead screw assembly, and a limiting ring that is slidably sleeved on the surface of the light shaft is fixed to the rear side of the moving block of the unidirectional lead screw assembly.

[0009] Preferably, the telescopic rotating device includes an inverted F-shaped plate connected to the top of the moving block of the one-way lead screw pair. A threaded rod and threaded sleeve assembly and a second telescopic square tube section are horizontally rotatably installed above the outer side of the inverted F-shaped plate. The outer end of the threaded sleeve of the threaded rod and threaded sleeve assembly is fitted with a horizontal tube with teeth on the middle of its outer wall via a bearing. The horizontal tube is horizontally fixedly inserted into the rear side of the connecting plate. The threaded rod and threaded sleeve assembly is located above the second telescopic square tube section. The bottom of the threaded sleeve is rotatably connected to the moving end of the second telescopic square tube section via a bearing seat. A second gear is fixedly sleeved on the outer end of the second telescopic square tube section. The second gear meshes with the teeth on the middle of the outer wall of the horizontal tube. Second forward and reverse rotation devices are fixedly installed on the middle and lower outer sides of the inner wall of the inverted F-shaped plate, respectively. The motor and the second drive shaft are horizontally and rotatably mounted. The outer end of the second drive shaft is connected to the outer wall of the second telescopic square tube section through the second sprocket and chain assembly. The inner wall of the inverted F-shaped plate is equipped with a fifth electric lock and a sixth electric lock respectively. The threaded rod end of the threaded rod and threaded sleeve assembly, the outer end of the fifth electric lock pin, the middle of the outer wall of the sixth electric lock pin, the motor shaft of the second forward and reverse motor, and the inner end of the second drive shaft are connected by a second conical friction wheel pair. The conical friction wheel of the second conical friction wheel pair is rotatably sleeved with the outer end of the fifth electric lock pin and the middle of the outer wall of the sixth electric lock pin, and the rest are fixedly sleeved. The outer end of the sixth electric lock pin is fixed with a friction block that fits against the inner wall of the conical friction wheel on the second drive shaft.

[0010] Preferably, a first electric rotary joint is installed on the outer surface of the horizontal tube, and the wires of the first electric rotary joint are connected in series to the coil power supply system.

[0011] Preferably, a second electric rotary joint connected in series with the power supply line of the electric clamp is installed at the center of the bottom of the hollow column.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention can make the upper and lower driving plates be squeezed upward and pushed downward by the up-and-down flipping and rightward outward flipping of the coil, and the upper driving plate can be pushed horizontally after rotating to the right. The rack drives the first gear to rotate, thereby realizing the rotation of the electric clamp, which in turn makes the rod between the clamp block and the electric clamp squeezed, stretched and twisted. The thrust provided by the coil is adjusted by controlling the voltage. Strain gauges are attached to the rods to carry out the test. The device uses electromagnetic loading as a power source, has a compact structure, is easy to operate, and is innovative. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of the present invention;

[0015] Figure 2 for Figure 1 Above view of the moving column;

[0016] Figure 3 for Figure 2 Sectional view at point AA;

[0017] Figure 4 This is a schematic diagram of the coil power supply system of the present invention;

[0018] Figure 5 for Figure 1 Top view of the connecting plate;

[0019] Figure 6 for Figure 5 Schematic diagram of the telescopic rotating device;

[0020] Figure 7 for Figure 2 Partial view.

[0021] The attached diagram lists the components represented by each number as follows:

[0022] 1-Base, 2-Support column, 3-Circular hole plate, 4-Electric push rod, 5-Top plate, 6-Double-direction screw pair, 7-Clamping block, 8-Moving column, 9-First electric bolt lock, 10-Hollow column, 11-Electric clamp, 12-Manual telescopic rod, 13-Support plate, 14-One-way screw pair, 15-Drive plate, 16-Connecting plate, 17-Coil, 18-Telescopic rotating device, 19-First forward and reverse motor, 20-First telescopic square tube section, 21-L-shaped plate, 22-First drive shaft, 23-First sprocket and chain assembly, 24-Fourth electric bolt lock, 25-Third electric bolt lock, 26-Worm gear assembly, 27-First conical friction wheel pair, 28-Mounting ring, 2 9-First gear, 30-Rack, 31-Inverted T-block, 32-Rotating plate, 33-Second electric bolt lock, 34-Rotating shaft, 35-Stop block, 36-Horizontal bar, 37-Second electric rotary joint, 80-Circular groove, 1800-Inverted F-shaped plate, 1801-Threaded rod and threaded sleeve assembly, 1802-Second telescopic square tube section, 1803-Horizontal tube, 1804-Second gear, 1805-Second forward and reverse motor, 1806-Second drive shaft, 1807-Second sprocket and chain assembly, 1808-Fifth electric bolt lock, 1809-Sixth electric bolt lock, 1810-Friction block, 1811-Second conical friction wheel pair, 1812-First electric rotary joint. Detailed Implementation

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

[0024] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0025] Please see Figure 1-3This invention provides a technical solution: an electromagnetic loading test device suitable for tension, torsion, and shear tests, comprising a base 1, with support columns 2 fixed at the center of both sides of the upper surface of the base 1, a circular perforated plate 3 horizontally fixed between the tops of the two support columns 2, an electric push rod 4 vertically fixed at the center of both sides of the upper surface of the circular perforated plate 3, a top plate 5 horizontally fixed between the tops of the two electric push rods 4, a bidirectional lead screw pair 6 rotatably mounted in the lower surface of the top plate 5, clamping blocks 7 fixed at the bottom of the moving blocks on both sides of the bidirectional lead screw pair 6, and a moving column 8 slidably inserted into the circular perforated plate 3. A pair of first electric bolt locks 9 are symmetrically inserted into the inner wall of the perforated plate 3. The outer ends of the bolts of the first electric bolt locks 9 are connected to the outer wall of the moving column 8 through a slider groove assembly. A hollow column 10 is rotatably installed on the vertical axis of the moving column 8. An electric clamp 11 is fixed to the top of the hollow column 10. A pair of manual telescopic rods 12 are symmetrically screwed vertically to the bottom two sides of the moving column 8. A support plate 13 is fixed between the bottoms of the two manual telescopic rods 12. A drive plate 15 is installed on the upper surface of the support plate 13 and the bottom of the moving column 8. The rear sides of the two support columns 2 are... A one-way lead screw pair 14 is horizontally rotatably installed through a fixed side plate. A telescopic rotating device 18 is horizontally installed in front of the moving block of the one-way lead screw pair 14. A connecting plate 16 is installed at the front end of the telescopic rotating device 18. A coil 17 is fixed on the upper surface of the connecting plate 16. The coil 17 is connected to the mains power through a coil power supply system. A circular groove 80 is provided at the bottom of the moving column 8. A first gear 29 is fixedly sleeved at the end of the hollow column 10. A rack 30 is horizontally engaged with the outer side of the first gear 29 and slides against the inner wall of the circular groove 80. The inner wall of the circular groove 80... An inverted T-shaped block 31 extending to the circumference is slidably engaged in the diameter direction. A second electric bolt lock 33 is inserted into the outer end of the inverted T-shaped block 31 through a stepped blind hole. A rotating shaft 34 is rotatably mounted on the upper part of the inner wall of the stepped blind hole via a torsion spring. A rotating plate 32 is fixed to the outer side of the rotating shaft 34. An installation ring 28 is fixed to the outer end of the rotating plate 32. A drive plate 15 is coaxially embedded in the surface of the installation ring 28. A stop block 35, which is inserted into the rotating shaft 34 through a blind hole, is fixed to the outer end of the pin of the second electric bolt lock 33. A crossbar 36 is fixed to the outer side of the inverted T-shaped block 31. The outer wall of the crossbar 36 is connected to the end of the rack 30.

[0026] Please see Figure 4The coil power supply system includes a switch K1 connected in series with one end of the low-voltage AC power supply. A resistor R1 is connected in series with the other end of switch K1. An adjustable transformer T is connected in series with the other end of the resistor R1. The other end of the primary winding of the adjustable transformer T is connected in series with the other end of the low-voltage AC power supply. One end of the secondary winding of the adjustable transformer T is grounded, and the other end is connected in series with a rectifier D1 and a resistor R2. The other end of the resistor R2 is connected in parallel with one end of coil 17 and a capacitor bank C1. The other end of the capacitor bank C1 is connected in series with a switch K2. The other end of switch K2 is connected in parallel with a ground wire and the other end of coil 17. The capacitor bank C1 obtains energy as follows: First, the charging circuit is turned on by switch K1. The low-voltage AC power (220V) is stepped up by the adjustable transformer T. The AC power is then rectified by rectifier D1 into DC power. The DC power charges the capacitor bank C1 until it is fully charged. Then the charging circuit is turned off. In this way, the capacitor bank C1 has a certain amount of energy, which can provide energy in the discharge circuit. The electromagnetic thrust... in: The magnetic flux density on the upper surface of the driving chip; To drive the magnetic induction intensity on the lower surface of the chip; and The value is obtained by measuring the magnetic induction intensity signal; μ is the magnetic permeability of the medium.

[0027] Please see Figure 1 and 5 A first telescopic square tube section 20 is vertically and rotatably mounted on the upper surface of the base 1, parallel to the support column 2. An L-shaped plate 21 is mounted between the upper outer wall of the first telescopic square tube section 20 and the outer wall of the lead screw of the double-acting lead screw pair 6 via a bearing. The outer end of the lead screw of the double-acting lead screw pair 6 and the top end of the first telescopic square tube section 20 are connected by a bevel gear pair. A first forward and reverse motor 19 is mounted on the rear right side of the upper surface of the base 1. A worm gear assembly 26 is mounted between the bottom of the outer wall of the first telescopic square tube section 20 and the upper surface of the base 1 via a bearing seat. A [missing information - likely a gear or component] is installed between the first forward and reverse motor 19 and the worm of the worm gear assembly 26. A first conical friction wheel pair 27 is installed between the outer end of the motor shaft of the first reversible motor 19, the outer end of the pin of the third electric lock 25, and the end of the worm gear. The conical friction wheel of the first conical friction wheel pair 27 is rotatably sleeved with the pin of the third electric lock 25, while the rest is fixedly sleeved. When the third electric lock 25 is energized and extended, the first reversible motor 19 can cooperate with the first conical friction wheel pair 27 to make the worm gear assembly 26 rotate in both directions. In turn, the first telescopic square tube section 20 can rotate in both directions. Through the bevel gear pair, the bidirectional lead screw pair 6 can rotate in both directions. In turn, the clamping block 7 can be used to clamp the rod.

[0028] Furthermore, a first drive shaft 22 parallel to the motor shaft is mounted on the rear side of the first reversible motor 19 via a bearing housing. The outer wall of the first drive shaft 22 is connected to the outer end of the one-way lead screw pair 14 via a first sprocket and chain assembly 23. A fourth electric lock 24 is horizontally mounted between the first drive shaft 22 and the motor shaft. The outer end of the first drive shaft 22, the outer end of the motor shaft of the first reversible motor 19, and the outer end of the pin of the fourth electric lock 24 are also connected via a first conical friction wheel pair 27. The conical friction wheel of the first conical friction wheel pair 27 is rotatably sleeved with the pin of the fourth electric lock 24, while the rest are fixedly sleeved. When the fourth electric lock 24 is energized and extended, the first reversible motor 19, in conjunction with the first conical friction wheel pair 27, can make the first drive shaft 22 rotate in both directions, thereby enabling the one-way lead screw pair 14 to rotate in both directions, causing it to drive the connecting plate 16 to move left and right.

[0029] Furthermore, a light shaft is horizontally fixed to the rear side of the fixed side plate of the one-way lead screw assembly 14, and a limiting ring that slides onto the surface of the light shaft is fixed to the rear side of the moving block of the one-way lead screw assembly 14 to prevent the lead screw of the one-way lead screw assembly 14 from bending.

[0030] Please see Figure 6The telescopic rotating device 18 includes an inverted F-shaped plate 1800 connected to the top of the moving block of the one-way lead screw pair 14. A threaded rod and threaded sleeve assembly 1801 and a second telescopic square tube section 1802 are horizontally rotatably installed above the outer side of the inverted F-shaped plate 1800. A horizontal tube 1803 with teeth on its outer wall is mounted to the outer end of the threaded sleeve of the threaded rod and threaded sleeve assembly 1801 via a bearing. The horizontal tube 1803 is horizontally fixedly inserted into the rear side of the connecting plate 16. The threaded rod and threaded sleeve assembly 1801 is located above the second telescopic square tube section 1802. The bottom of the threaded sleeve is rotatably connected to the moving end of the second telescopic square tube section 1802 via a bearing seat. The second telescopic square tube... A second gear 1804 is fixedly sleeved on the outer end of section 1802. The second gear 1804 meshes with the teeth in the middle of the outer wall of the horizontal tube 1803. A second forward and reverse motor 1805 is fixedly installed on the middle and lower outer side of the inner wall of the inverted F-shaped plate 1800, and a second drive shaft 1806 is horizontally and rotatably mounted therethrough. The outer end of the second drive shaft 1806 is connected to the outer wall of the second telescopic square tube section 1802 through a second sprocket and chain assembly 1807. A fifth electric bolt lock 1808 and a sixth electric bolt lock 1809 are respectively installed on the upper and lower inner sides of the inner wall of the inverted F-shaped plate 1800. The threaded rod end of the threaded rod and threaded sleeve assembly 1801 and the fifth electric bolt lock 1809 are also connected. The outer end of the 8th electric bolt, the middle part of the outer wall of the sixth electric bolt 1809, the motor shaft of the second forward / reverse motor 1805, and the inner end of the second drive shaft 1806 are connected by a second conical friction wheel pair 1811. The conical friction wheel of the second conical friction wheel pair 1811 is rotatably sleeved with the outer end of the fifth electric bolt 1808 and the middle part of the outer wall of the sixth electric bolt 1809, while the rest are fixedly sleeved. The outer end of the sixth electric bolt 1809 is fixed with a friction block 1810 that fits against the inner wall of the conical friction wheel on the second drive shaft 1806. When the fifth electric bolt 1808 is energized and extends, the second forward / reverse motor 1805 extends through the second conical friction wheel. The wheel assembly 1811 can extend and retract the threaded rod and threaded sleeve assembly 1801. When the sixth electric bolt lock 1809 is energized and extends, the second forward and reverse motor 1805 can cooperate with the second conical friction wheel assembly 1811 to make the second drive shaft 1806 rotate forward and reverse. Then, the second sprocket and chain assembly 1807 can be used to make the second telescopic square tube section rotate forward and reverse. Through the meshing of the teeth of the second gear 1804 with the middle of the outer wall of the horizontal tube 1803, the horizontal tube 1803 drives the connecting plate 16 to rotate. When the sixth electric bolt lock 1809 is de-energized, the bolt retracts, and the friction block 1810 squeezes and limits the conical friction wheel on the second drive shaft 1806 to prevent the connecting plate 16 from rotating.

[0031] Furthermore, a first electric rotary joint 1812 is installed on the outer surface of the horizontal tube 1803. The wires of the first electric rotary joint 1812 are connected in series to the coil power supply system for easy power connection.

[0032] Please see Figure 7A second electric rotary joint 37, which is connected in series with the power supply line of the electric clamp 11, is installed at the center of the bottom of the hollow column 10 for safe power connection.

[0033] When using the electromagnetic loading test device for tension, torsion and shear of the present invention: the rod with strain gauges attached to the surface and connected to the computer detection system is clamped between the electric clamp 11 and the clamping block 7. At the same time, the position of the moving column 8 is adjusted by the first electric lock 9 so that the upper driving plate 15 is close to the coil 17. The coil 17 is energized to generate an upward thrust, which is used to detect the compression and shear effect of the rod.

[0034] Then, the coil 17 is rotated downward by the telescopic rotating device 18. The manual telescopic rod 12 is adjusted so that the driving plate 15 below can be brought closer to the coil 17. The rod is then clamped between the electric clamp 11 and the clamping block 7. The coil 17 is energized to generate a downward pulling force, which is used to detect the tensile effect of the rod.

[0035] Disassemble the manual telescopic rod 12, rotate the mounting ring 28 to rotate the drive plate 15 90 degrees to the right, then connect the second electric lock 33 to limit the stop 35, and use the one-way screw pair 14 and telescopic rotation device 18 to move the coil 17 to the right and rotate it to face the drive plate 15. The coil 17 is energized, generating a rightward thrust. The rack 30 drives the first gear 29 to rotate. The torque is calculated to detect the torsional effect of the rod.

[0036] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0037] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An electromagnetic loading test device suitable for tension, torsion, and shear tests, comprising a base (1), characterized in that: Support columns (2) are fixed to the middle of both sides of the upper surface of the base (1). A circular hole plate (3) is horizontally fixed between the tops of the two support columns (2). An electric push rod (4) is vertically fixed to the middle of both sides of the upper surface of the circular hole plate (3). A top plate (5) is horizontally fixed between the tops of the two electric push rods (4). A bidirectional lead screw pair (6) is installed through the lower surface of the top plate (5). Clamping blocks (7) are fixed to the bottom of the moving blocks on both sides of the bidirectional lead screw pair (6). A moving column (8) is slidably inserted into the circular hole plate (3). A pair of first electric bolt locks (9) are symmetrically inserted into the center of the inner wall of the circular hole plate (3). The outer end of the pin of the first electric bolt lock (9) is connected to the outer wall of the moving column (8) through a slider groove assembly. A hollow column (10) is rotatably installed on the vertical axis of the moving column (8). An electric clamp (11) is fixed to the top of the hollow column (10). A pair of manual telescopic rods (12) are vertically screwed symmetrically to the center of the bottom of the moving column (8). A support plate (13) is fixed between the bottoms of the two manual telescopic rods (12). A drive plate (15) is installed on the upper surface of the support plate (13) and the bottom of the moving column (8). A one-way screw pair (1) is horizontally rotatably installed between the rear sides of the two support columns (2) through a fixed side plate. 4) A telescopic rotating device (18) is horizontally installed in front of the moving block of the one-way screw pair (14). A connecting plate (16) is installed at the front end of the telescopic rotating device (18). A coil (17) is fixed on the upper surface of the connecting plate (16). The coil (17) is connected to the mains power through a coil power supply system. A circular groove (80) is provided at the bottom of the moving column (8). A first gear (29) is fixedly sleeved at the end of the hollow column (10). A rack (30) is horizontally meshed on the outer side of the first gear (29) and slides against the inner wall of the circular groove (80). A toothed rack extending to the periphery slides against the inner wall of the circular groove (80) in the diameter direction. The inverted T-shaped block (31) has a second electric bolt lock (33) inserted into its outer end through a stepped blind hole. A rotating shaft (34) is mounted on the upper part of the inner wall of the stepped blind hole through a torsion spring. A rotating plate (32) is fixed on the outer side of the rotating shaft (34). An installation ring (28) is fixed on the outer end of the rotating plate (32). The driving plate (15) is coaxially embedded in the surface of the installation ring (28). A stop block (35) is fixed on the outer end of the pin of the second electric bolt lock (33) through a blind hole to which the rotating shaft (34) is inserted. A crossbar (36) is fixed on the outer side of the inverted T-shaped block (31). The outer wall of the crossbar (36) is connected to the end of the rack (30).

2. The electromagnetic loading test device suitable for tension, torsion, and shear tests according to claim 1, characterized in that: The coil power supply system includes a switch K1 connected in series with one end of the low-voltage AC power supply. The other end of the switch K1 is connected in series with a resistor R1. The other end of the resistor R1 is connected in series with an adjustable transformer T. The other end of the primary winding of the adjustable transformer T is connected in series with the other end of the low-voltage AC power supply. One end of the secondary winding of the adjustable transformer T is grounded, and the other end is connected in series with a rectifier D1 and a resistor R2. The other end of the resistor R2 is connected in parallel with one end of the coil (17) and a capacitor bank C1. The other end of the capacitor bank C1 is connected in series with a switch K2. The other end of the switch K2 is connected in parallel with a ground wire and the other end of the coil (17).

3. The electromagnetic loading test device suitable for tension, torsion, and shear tests according to claim 1, characterized in that: A first telescopic square tube section (20) is vertically and rotatably mounted on the upper surface of the base (1) parallel to the support column (2). An L-shaped plate (21) is mounted between the upper outer wall of the first telescopic square tube section (20) and the outer wall of the double-acting screw pair (6) via a bearing. The outer end of the double-acting screw pair (6) and the top end of the first telescopic square tube section (20) are connected by a bevel gear pair. A first forward and reverse motor (19) is mounted on the rear right side of the upper surface of the base (1). The bottom of the outer wall of the first telescopic square tube section (20) A worm gear assembly (26) is installed between the base (1) and the upper surface of the base (1) via a bearing seat. A third electric lock (25) is installed between the first reversible motor (19) and the worm of the worm gear assembly (26). A first conical friction wheel pair (27) is installed between the outer end of the motor shaft of the first reversible motor (19), the outer end of the pin of the third electric lock (25), and the end of the worm. The conical friction wheel of the first conical friction wheel pair (27) is rotatably sleeved with the pin of the third electric lock (25), and the rest are fixedly sleeved.

4. The electromagnetic loading test device suitable for tension, torsion, and shear tests according to claim 3, characterized in that: The first drive shaft (22) parallel to the motor shaft is mounted on the rear side of the first reversible motor (19) through a bearing seat. The outer wall of the first drive shaft (22) is connected to the outer end of the one-way screw pair (14) through a first sprocket and chain assembly (23). A fourth electric lock (24) is horizontally mounted between the first drive shaft (22) and the motor shaft. The outer end of the first drive shaft (22), the outer end of the motor shaft of the first reversible motor (19), and the outer end of the pin of the fourth electric lock (24) are also connected through a first conical friction wheel pair (27). The conical friction wheel of the first conical friction wheel pair (27) is rotatably sleeved with the pin of the fourth electric lock (24), and the rest are fixedly sleeved.

5. The electromagnetic loading test device suitable for tension, torsion, and shear tests according to claim 4, characterized in that: A light shaft is horizontally fixed on the rear side of the fixed side plate of the one-way screw pair (14), and a limiting ring that is slidably sleeved on the surface of the light shaft is fixed on the rear side of the moving block of the one-way screw pair (14).

6. The electromagnetic loading test device suitable for tension, torsion, and shear tests according to claim 1, characterized in that: The telescopic rotating device (18) includes an inverted F-shaped plate (1800) connected to the top of the moving block of the one-way lead screw pair (14). A threaded rod and threaded sleeve assembly (1801) and a second telescopic square tube section (1802) are horizontally rotatably installed above the outer side of the inverted F-shaped plate (1800). A horizontal tube (1803) with teeth set in the middle of its outer wall is mounted on the outer end of the threaded sleeve of the threaded rod and threaded sleeve assembly (1801) via a bearing. The horizontal tube (1803) is horizontally fixedly inserted into the rear side of the connecting plate (16). The threaded sleeve assembly (1801) is located above the second telescopic square tube section (1802). The bottom of the threaded sleeve is rotatably connected to the moving end of the second telescopic square tube section (1802) through a bearing seat. A second gear (1804) is fixedly sleeved on the outer end of the second telescopic square tube section (1802). The second gear (1804) meshes with the teeth in the middle of the outer wall of the horizontal tube (1803). A second forward and reverse motor (1805) and a horizontal motor are fixedly installed on the middle and lower parts of the outer side of the inner wall of the inverted F-shaped plate (1800). A second drive shaft (1806) is rotatably mounted through the shaft. The outer end of the second drive shaft (1806) is connected to the outer wall of the second telescopic square tube section (1802) via a second sprocket and chain assembly (1807). A fifth electric bolt lock (1808) and a sixth electric bolt lock (1809) are respectively installed on the inner side of the inner wall of the inverted F-shaped plate (1800). The threaded rod end of the threaded rod and threaded sleeve assembly (1801), the outer end of the pin of the fifth electric bolt lock (1808), the middle part of the outer wall of the pin of the sixth electric bolt lock (1809), and the first electric bolt lock (1809) are all connected to the outer wall of the second telescopic square tube section (1802). The motor shaft of the two forward and reverse motors (1805) and the inner end of the second drive shaft (1806) are connected by a second conical friction wheel pair (1811). The conical friction wheel of the second conical friction wheel pair (1811) is rotatably sleeved with the outer end of the pin of the fifth electric lock (1808) and the middle part of the outer wall of the pin of the sixth electric lock (1809), while the rest are fixedly sleeved. The outer end of the pin of the sixth electric lock (1809) is fixed with a friction block (1810) that is in contact with the inner wall of the conical friction wheel on the second drive shaft (1806).

7. The electromagnetic loading test device suitable for tension, torsion, and shear tests according to claim 6, characterized in that: A first electric rotary joint (1812) is installed on the outer surface of the horizontal tube (1803), and the wires of the first electric rotary joint (1812) are connected in series to the coil power supply system.

8. The electromagnetic loading test device suitable for tension, torsion, and shear tests according to claim 1, characterized in that: A second electric rotary joint (37) is installed at the bottom center of the hollow column (10) and connected in series with the power supply line of the electric clamp (11).

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