Square and round electromagnetic drive Hopkinson bar clamp capable of being freely switched

Abstract

The utility model relates to the field of dynamic mechanical test fixtures, and discloses a square and circular free switching electromagnetic drive Hopkinson bar fixture which comprises a frame, a fixing component is mounted at the top of the frame, top mounting grooves are formed in two sides of the top of the frame, a top roller is arranged between the two top mounting grooves, and a top roller is mounted on the top of the frame. Side adjusting assemblies are installed on the two sides of the frame correspondingly, a bottom adjusting assembly is installed in the middle of the frame, lifting assemblies are installed on the two sides of the outer wall of the frame correspondingly, lifting assemblies are installed on the two sides of the inner bottom wall of the frame correspondingly, each side adjusting assembly comprises a side plate, and each side plate is fixedly connected to the side wall of the frame through two second fixing bolts. According to the utility model, the height of the bottom roller is adjusted by means of the two lifting assemblies on the inner side, the four surfaces of the rod piece are ensured to be positioned among the top roller, the bottom roller and the two guide wheels, the adaptive adjustment of the clamp is completed, the clamp does not need to be frequently replaced to adapt to different rod pieces, and the efficiency of testing the mechanical property of a material by the device is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to dynamic mechanical test fixture field especially relates to a square, circular free switching electromagnetic drive hopkinson bar fixture. BACKGROUND

[0002] Engineering materials often encounter complex dynamic load of multidirectional, multi-intensity and multi-rate in practical application, and usually, in order to ensure the stability of the mechanical properties of materials, Hopkinson bar is used as a classical method of dynamic mechanical test, and the device realizes efficient test on the mechanical properties of materials through the cooperation of incident bars and transmission bars, wherein the incident bars and the transmission bars need to be fixed through specific fixture assemblies in the installation process in order to accurately match the launching device, and then the incident bars and the transmission bars are installed.

[0003] The applicant has previously applied for a micro dual-shaft synchronous electromagnetic drive Hopkinson bar experimental test device with the application number "202520093472X", which comprises a bottom plate, the top center of the bottom plate is fixedly connected with an experimental platform, and the experimental platform is cross-shaped, two adjacent ends of the experimental platform are each provided with an electromagnetic ejection assembly, the other two ends of the experimental platform are each provided with a buffer bin, the buffer bin is internally provided with a buffer assembly, the top center of the experimental platform is provided with a test block, and the top of the experimental platform is provided with a plurality of support assemblies, two adjacent support assemblies are internally provided with an incident bar, and the other two adjacent support assemblies are internally provided with a transmission bar; and the applicant has previously applied for a multi-dimensional electromagnetic drive Hopkinson test device with the application number "2024104890468", the main body frame is composed of two cross-arranged support plates, a transmitter and an incident bar are sequentially mounted on the top of one end of the support plate, a transmission bar is arranged on the top of the other end of the support plate, a plurality of support mechanisms are arranged on the support plate, and the incident bar and the transmission bar are connected with the support plate through the support mechanisms, that is, the incident bar and the transmission bar need to be fixed by a fixture, but the diameters of the incident bars and the transmission bars used for testing different materials are different, so different types of incident bars and transmission bars need to be fixed by corresponding matching fixtures, which leads to the fact that when high-strength and multi-type material mechanical property tests are performed, workers need to frequently replace incident bars and transmission bars, and multiple different fixtures are used, resulting in low test efficiency, and therefore a square, circular free switching electromagnetic drive Hopkinson bar fixture is proposed. UTILITY MODEL CONTENTS

[0004] In order to make up for the above shortcomings, the utility model provides a square, circular free switching electromagnetic drive Hopkinson bar fixture, which aims at improving the problem that multiple different types of fixtures are needed to install incident bars and transmission bars when different types of material mechanical property tests are performed in the prior art, which greatly affects the test efficiency.

[0005] To achieve the above object, the utility model discloses the following technical scheme:

[0006] A square, round free switching electromagnetic drive hopkinson bar fixture, including frame, the fixed assembly is installed on the top of frame, the top installation slot is set up in both sides of the top of frame, the top roller is equipped between two top installation slots, the side adjusting assembly is installed on both sides of frame, the bottom adjusting assembly is installed in the middle of frame, the lifting assembly is installed on both sides of the outer wall of frame, the lifting assembly is installed on both sides of the inner bottom wall of frame,

[0007] The side adjusting assembly includes a side plate, the side plate is fixedly connected to the side wall of the frame through two fixed bolts, a sleeve is fixedly connected to the middle of the side plate, an adjusting rod is slidably connected in the sleeve, a wheel carrier is fixedly connected to one end of the adjusting rod, a guide wheel is rotatably connected to the middle of the wheel carrier, a handle is fixedly connected to the other end of the adjusting rod, and a limiting bolt is threadedly connected to the outer wall of the sleeve.

[0008] Further description of the above technical scheme:

[0009] The fixed assembly includes a top cover placed on the top of the frame, a fixed bolt one is arranged at each corner of the top cover, the bottom end of the fixed bolt one penetrates the top cover and is threadedly connected to the top of the frame, mounting bolts are threadedly connected to both sides of the middle of the top cover, and the bottom end of the mounting bolt penetrates the top cover and abuts against the outer wall of the top roller.

[0010] Further description of the above technical scheme:

[0011] The bottom adjusting assembly includes two adjusting seats, the adjusting seats are fixedly connected to the inside of the frame through two fixed bolts three, and a bottom roller is rotatably connected between the two adjusting seats.

[0012] Further description of the above technical scheme:

[0013] The lifting assembly includes a base fixedly connected to the bottom of the frame, a housing is fixedly connected to one side of the top of the base, a support frame is slidably connected in the housing, a sliding block is fixedly connected to the bottom end of the outer wall of the support frame, a lead screw is threadedly connected in the support frame, the bottom end of the lead screw penetrates the base and is fixedly connected with a driven gear, a first transmission gear is rotatably connected in the base, a second transmission gear is fixedly connected to the top of the first transmission gear, a motor is fixedly connected to the other side of the top of the base, a driving gear is fixedly connected to the output end of the motor, the driving gear and the first transmission gear are engaged, and the second transmission gear and the driven gear are engaged.

[0014] As a further description of the above technical solutions:

[0015] The sliding block is slidably connected to the inner wall of the shell, and the bottom end of the lead screw is rotatably connected to the top of the base.

[0016] As a further description of the above technical solutions:

[0017] The bottom of the driven gear is rotatably connected to the inner bottom wall of the base.

[0018] As a further description of the above technical solutions:

[0019] Two of the support frames have their top ends fixedly connected to the bottom of the two sleeves, and the other two support frames have their top ends rotatably connected to the bottom of the bottom roller.

[0020] As a further description of the above technical solutions:

[0021] The frame has an upper adjusting hole and a lower adjusting hole sequentially formed from top to bottom on both sides, the adjusting rod penetrates through the upper adjusting hole, and the adjusting seat is slidably connected inside the lower adjusting hole.

[0022] The utility model has the following beneficial effects:

[0023] 1、The utility model discloses a side adjusting assembly is arranged on the frame, and the adjusting rod is rotatably connected to the sleeve, and the two guide rollers are rotatably connected to the sleeve, and the bottom roller is rotatably connected to the base, and the driven gear is rotatably connected to the base.

[0024] 2、The utility model discloses a side adjusting assembly is arranged on the frame, and the adjusting rod is rotatably connected to the sleeve, and the two guide rollers are rotatably connected to the sleeve, and the bottom roller is rotatably connected to the base, and the driven gear is rotatably connected to the base. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A perspective view of a square and circular free switching electromagnetic drive Hopkinson bar clamp is provided.

[0026] Figure 2A side adjusting assembly structural schematic view of a square and circular freely switched electromagnetic driving Hopkinson bar clamp is provided in the utility model.

[0027] Figure 3 A lifting assembly structural schematic view of a square and circular freely switched electromagnetic driving Hopkinson bar clamp is provided in the utility model.

[0028] Figure 4 A bottom adjusting assembly structural schematic view of a square and circular freely switched electromagnetic driving Hopkinson bar clamp is provided in the utility model.

[0029] Figure 5 A frame structural schematic view of a square and circular freely switched electromagnetic driving Hopkinson bar clamp is provided in the utility model.

[0030] Figure 6 For Figure 5 The enlarged view of A in the middle.

[0031] Legend:

[0032] 1, frame; 2, top cover; 3, fixed bolt one; 4, mounting bolt; 5, top mounting groove; 6, top roller; 7, side plate; 8, fixed bolt two; 9, sleeve; 10, adjusting rod; 11, wheel carrier; 12, guide wheel; 13, handle; 14, limit bolt; 15, base; 16, shell; 17, support frame; 18, sliding block; 19, lead screw; 20, driven gear; 21, first transmission gear; 22, second transmission gear; 23, motor; 24, driving gear; 25, adjusting seat; 26, bottom roller; 27, fixed bolt three; 28, upper adjusting hole; 29, lower adjusting hole. Specific implementation

[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0034] Refer to Figure 1 And Figure 6The utility model provides a kind of embodiment: a square, circular free switching electromagnetic drive hopkinson bar fixture, including frame 1, frame 1 is made of aluminium alloy material, guarantee light while also can satisfy the support strength required by test experiment.Frame 1 top is equipped with fixed assembly, frame 1 top two sides are equipped with top mounting groove 5, top roller 6 is equipped between two top mounting grooves 5, top roller 6 is limited in the inside of two top mounting grooves 5 by fixed assembly, avoid its appearance drop-off condition, guarantee the stability of fixture when being tested use.Frame 1 two sides are equipped with side adjusting assembly, side adjusting assembly can be adjusted according to the diameter length of bar, to adapt to the bar use of different diameter length.Frame 1 middle part is equipped with bottom adjusting assembly, the clamping height of fixture can be adjusted according to the height of bar by bottom adjusting assembly, further improve the application range of fixture.Frame 1 outer wall two sides are equipped with lifting assembly, the height of side adjusting assembly is adjusted by two lifting assemblies outside, ensure that the side surface center line of side adjusting assembly and bar keeps level.Frame 1 inner bottom wall two sides are equipped with lifting assembly, the position of bottom adjusting assembly is adjusted by two lifting assemblies inside, then realize the clamping range of fixture is adjusted according to the height of bar.

[0035] Referring to Figure 1 And Figure 2 Side adjusting assembly includes side plate 7, side plate 7 is fixedly connected in the side wall of frame 1 by two fixed bolts two 8, corresponding two vertical grooves for the up-down movement of fixed bolt two 8 are formed on the side wall of frame 1, nut structure corresponding with fixed bolt two 8 is installed in the inside of vertical groove, when the position of fixed bolt two 8 is adjusted, nut structure will move up and down along with side plate 7, and when fixed bolt two 8 is tightened, side plate 7 can be fixed on the outside wall of frame 1.Sleeve 9 is fixedly connected in the middle part of side plate 7, adjusting rod 10 is slidably connected in the inside of sleeve 9, one end of adjusting rod 10 is fixedly connected with wheel carrier 11, wheel carrier 11 is rotatably connected with guide wheel 12 in the middle part, the other end of adjusting rod 10 is fixedly connected with handle 13, limit bolt 14 is threadedly connected on the outer wall of sleeve 9, when limit bolt 14 is loosened, the friction between adjusting rod 10 and sleeve 9 is reduced sharply, at this time, staff can adjust the position of adjusting rod 10 in the inside of sleeve 9 by pulling handle 13, then adjust the position of guide wheel 12, so that the distance between two guide wheels 12 can be adjusted according to the size of bar, and then limit bolt 14 is tightened, so that limit bolt 14 tightly abuts adjusting rod 10 in the inside of sleeve 9, then increase the friction between adjusting rod 10 and sleeve 9, realize the fixing effect of adjusting rod 10 and sleeve 9.

[0036] Referring to Figure 1 And Figure 6The fixed assembly comprises a top cover 2 arranged on the top of the frame 1, and the top cover 2 is provided with a fixing bolt 1 arranged at each corner, the bottom end of the fixing bolt 1 penetrates through the top cover 2 and is screwed on the top of the frame 1, and the middle part of the top cover 2 is screwed with a mounting bolt 4 arranged at each side, the bottom end of the mounting bolt 4 penetrates through the top cover 2 and abuts against the outer wall of the top roller 6, the top cover 2 and the frame 1 are fixed through the four fixing bolts 1 arranged at the four corners, so that the mounting bolt 4 limits the top roller 6 between the two top mounting grooves 5 after being screwed, thereby ensuring that the top roller 6 is stable when abutting against the rod.

[0037] With reference to Figure 1 and Figure 4 The bottom adjusting assembly comprises two adjusting seats 25 fixedly connected in the frame 1 through two fixing bolts 3, and the structure is similar to the side plate 7 of the side adjusting assembly, and two vertical grooves are arranged at the corresponding positions of the side edges of the frame 1, and nuts are arranged in the vertical grooves, which are used for fixing the adjusting seat 25 and facilitating the up-down movement of the adjusting seat 25 to adjust the height of the bottom roller 26. The bottom roller 26 is rotatably connected between the two adjusting seats 25, and the bottom end of the rod is supported by the bottom roller 26, which cooperates with the top roller 6 at the top and the two guide wheels 12 at the side edges to realize the omnibearing clamping and fixing of the rod, thereby ensuring the stability of the rod and enabling the rod to move in the clamp after being stressed, and then impacting the test block to test the mechanical properties.

[0038] With reference to Figure 1 and Figure 3 The lifting assembly comprises a base 15 fixedly connected at the bottom of the frame 1, the top side of the base 15 is fixedly connected with a housing 16, the housing 16 is slidably connected with a support frame 17, the support frame 17 is limited by the housing 16 to ensure that the support frame 17 can be stable when moving up and down. The outer wall of the support frame 17 is fixedly connected with a sliding block 18 at the bottom end, and the cooperation between the sliding block 18 and the housing 16 ensures that the support frame 17 will not appear to be selected during the movement. The support frame 17 is screwedly connected with a lead screw 19 in the inside, the bottom end of the lead screw 19 penetrates through the base 15 and is fixedly connected with a driven gear 20, the inside of the base 15 is rotatably connected with a first transmission gear 21, the top of the first transmission gear 21 is fixedly connected with a second transmission gear 22, the other side of the top of the base 15 is fixedly connected with a motor 23, the output end of the motor 23 is fixedly connected with a driving gear 24, the driving gear 24 and the first transmission gear 21 are engaged, the second transmission gear 22 and the driven gear 20 are engaged, the motor 23 drives the driving gear 24 to rotate, and the cooperation between the driving gear 24 and the first transmission gear 21, the second transmission gear 22 and the driven gear 20 increases the output torque of the motor 23, which is then transmitted to the lead screw 19 to make it rotate, the lead screw 19 rotates to drive the support frame 17 to move up and down, thereby adjusting the height of the side adjusting assembly and the height of the bottom adjusting assembly.

[0039] With reference to Figure 1 And Figure 3 The slider 18 is slidably connected to the inner wall of the shell 16, and through the cooperation of the slider 18 and the shell 16, the support frame 17 can be kept stable during movement, and the cooperation between the lead screw 19 and the lead screw 19 ensures stable lifting activity. The bottom end of the lead screw 19 is rotatably connected to the top of the base 15, so that the lead screw 19 can be stably supported on the base 15 to avoid shaking, and the stability of the lifting assembly during operation is ensured. The bottom of the driven gear 20 is rotatably connected to the inner bottom wall of the base 15, so that the driven gear 20 is more stable during power transmission. The top ends of two support frames 17 are fixedly connected to the bottoms of two sleeves 9, respectively, so that the height of the side adjusting assembly can be adjusted when the support frames 17 move up and down. The top ends of the other two support frames 17 are rotatably connected to the bottom ends of the bottom rollers 26, respectively, so that the height of the bottom rollers 26 can be adjusted when the support frames 17 move up and down to adapt to different types of rod use.

[0040] With reference to Figure 1 , Figure 2 , Figure 4 And Figure 5 The upper adjusting hole 28 and the lower adjusting hole 29 are sequentially provided on the frame 1 from top to bottom, the adjusting rod 10 penetrates the upper adjusting hole 28, and the adjusting seat 25 is slidably connected inside the lower adjusting hole 29. Through the cooperation of the upper adjusting hole 28 and the lower adjusting hole 29, the side adjusting assembly and the bottom adjusting assembly can move up and down on the frame 1, and then the position of the rod can be adaptively adjusted according to the size of the rod.

[0041] Working principle: when installing the incident rod and the transmission rod, the incident rod and the transmission rod are inserted from the gap between the top roller 6 and the bottom roller 26, so that the upper and lower ends of the incident rod and the transmission rod are in contact with the bottom of the top roller 6 and the top of the bottom roller 26, respectively, and the upper and lower ends of the incident rod and the transmission rod are limited, and the two sides of the incident rod and the transmission rod also contact the two guide rollers 12 on the two sides, thereby realizing the effect of limiting and fixing the four sides of the incident rod and the transmission rod, and through the fixation of the upper and lower and left and right four sides, the clamp can not only adapt to the test use of square rod, but also adapt to the test use of circular rod, greatly improving the adaptability of the clamp in the Hopkinson bar dynamic mechanical testing device. At this time, the incident rod can be pushed into the front end of the Hopkinson bar dynamic mechanical testing device, and the transmission rod can be installed on the corresponding impact end of the Hopkinson bar dynamic mechanical testing device, and then the device can be started, the power generated by the launching part pushes the incident rod pile foundation test block, and then the force is transmitted to the transmission rod by the test block, and then the transmission rod acts on the pile foundation sensor to realize the test of the force.

[0042] When different diameter and length size of incident rod and transmission rod need to be installed, the staff only needs to loosen the limiting bolt 14 on the sleeve 9 corresponding to the size of the incident rod and the transmission rod, so that the limiting bolt 14 is loosened, at this time the adjusting rod 10 and the sleeve 9 are in an unlocked state, the staff can adjust the position of the two adjusting rods 10 inside the sleeve 9 according to the width of the incident rod and the transmission rod, and then adjust the distance between the two guide wheels 12, so that the distance is the same as the width of the new model of incident rod and transmission rod, and then tighten the limiting bolt 14 to lock the adjusting rod 10 inside the sleeve 9, and then lock the position of the two guide wheels 12. Then loosen the fixing bolt two 8, so that the side plate 7 and the frame 1 are unlocked, at this time the corresponding lifting assembly under it is started, the motor 23 drives the driving gear 24 to rotate, and then the driving gear 24 drives the first transmission gear 21 to rotate, and then the first transmission gear 21 drives the second transmission gear 22 at the top to rotate, and then the second transmission gear 22 drives the driven gear 20 to rotate, and then the second transmission gear 22 drives the lead screw 19 connected to it to rotate, and then drives the support frame 17 to move up or down inside the housing 16, and then the side adjusting assembly is pushed up or down by the support frame 17, and then the adjusting rod 10 in the side adjusting assembly moves up and down in the upper adjusting hole 28, until the centers of the two guide wheels 12 and the two side surface centers of the incident rod are aligned, then tighten the fixing bolt two 8 on the side plate 7 again to fix the side adjusting assembly on the frame 1, and complete the adjustment of the side adjusting assembly.

[0043] Then loosen the two fixing bolts three 27 on the adjusting seat 25, so that the adjusting seat 25 and the frame 1 are unlocked, and then start the two lifting assemblies at the bottom of the bottom roller 26, adjust the height of the bottom roller 26, so that the bottom surface of the new model of incident rod and transmission rod contacts with the bottom roller 26, and at the same time ensure that the top surface of the incident rod and the transmission rod contacts with the top roller 6, and then tighten the fixing bolt three 27 again to fix the adjusting seat 25 and the frame 1, and then complete the adjustment of the clamp adaptability, so that the clamp can adapt to the use of various models of incident rod and transmission rod, and can also be used for fixing square and circular rod, which greatly improves the test efficiency of the parkinson rod dynamic mechanical testing device, and the clamp device of the application can adapt to all rod with diameter of φ30-100 when in use.

[0044] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A square, circular free switching electromagnetic driven Hopkinson bar clamp comprising a frame (1), characterized in that: The frame (1) top is provided with a fixing assembly, both sides of the frame (1) top are provided with a top mounting slot (5), a top roller (6) is arranged between the two top mounting slots (5), a side adjusting assembly is arranged on both sides of the frame (1), a bottom adjusting assembly is arranged on the middle of the frame (1), a lifting assembly is arranged on both sides of the outer wall of the frame (1), and a lifting assembly is arranged on both sides of the inner bottom wall of the frame (1); The side adjusting assembly comprises a side plate (7), the side plate (7) is fixedly connected to the side wall of the frame (1) through two fixed bolts (8), a sleeve (9) is fixedly connected to the middle of the side plate (7), an adjusting rod (10) is slidably connected in the sleeve (9), a wheel frame (11) is fixedly connected to one end of the adjusting rod (10), a guide wheel (12) is rotatably connected to the middle of the wheel frame (11), a handle (13) is fixedly connected to the other end of the adjusting rod (10), and a limiting bolt (14) is threadedly connected to the outer wall of the sleeve (9).

2. A square, circular free switch electromagnetic driven Hopkinson bar fixture according to claim 1, characterized in that: The fixing assembly comprises a top cover (2) arranged on the top of the frame (1), the top cover (2) is provided with a fixed bolt (3) at four corners, the bottom end of the fixed bolt (3) penetrates the top cover (2) and is threadedly connected to the top of the frame (1), and the middle of the top cover (2) is provided with an installation bolt (4) on both sides, the bottom end of the installation bolt (4) penetrates the top cover (2) and abuts against the outer wall of the top roller (6).

3. A square, circular free switch electromagnetic driven Hopkinson bar fixture according to claim 2, characterized in that: The bottom adjusting assembly comprises two adjusting seats (25), the adjusting seats (25) are fixedly connected to the inside of the frame (1) through two fixed bolts (27), and a bottom roller (26) is rotatably connected between the two adjusting seats (25).

4. A square, circular free switch electromagnetic driven Hopkinson bar fixture according to claim 3, characterized in that: The lifting assembly comprises a base (15) fixedly connected to the bottom of the frame (1), a housing (16) fixedly connected to one side of the top of the base (15), a support frame (17) slidably connected in the housing (16), a sliding block (18) fixedly connected to the bottom end of the outer wall of the support frame (17), a lead screw (19) threadedly connected in the support frame (17), a driven gear (20) fixedly connected to the bottom end of the lead screw (19), a first transmission gear (21) rotatably connected in the base (15), a second transmission gear (22) fixedly connected to the top of the first transmission gear (21), a motor (23) fixedly connected to the other side of the top of the base (15), a driving gear (24) fixedly connected to the output end of the motor (23), the driving gear (24) and the first transmission gear (21) are engaged, and the second transmission gear (22) and the driven gear (20) are engaged.

5. A square, circular free switch electromagnetic driven Hopkinson bar clamp according to claim 4, characterized in that: The sliding block (18) is slidably connected to the inner wall of the housing (16), and the bottom end of the lead screw (19) is rotatably connected to the top of the base (15).

6. A square, circular free switch electromagnetic driven Hopkinson bar clamp according to claim 4, characterized in that: The bottom end of the driven gear (20) is rotatably connected to the inner bottom wall of the base (15).

7. A square, circular free switch electromagnetic driven Hopkinson bar clamp according to claim 4, characterized in that: Two top ends of the support frames (17) are fixedly connected with the bottom of the two sleeves (9) respectively, and the other two top ends of the support frames (17) are rotatably connected with the bottom of the two ends of the bottom roller (26) respectively.

8. A square, circular free switch electromagnetic driven Hopkinson bar clamp according to claim 4, characterized in that: The frame (1) is provided with an upper adjusting hole (28) and a lower adjusting hole (29) from top to bottom on both sides, the adjusting rod (10) penetrates through the upper adjusting hole (28), and the adjusting seat (25) is slidably connected in the lower adjusting hole (29).

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