An impact pendulum device

Abstract

The present invention discloses an impact pendulum device, comprising a mounting frame, a swing arm and a hammer head, wherein the swing arm is a telescopic rod structure, the upper end of the swing arm is hinged with the mounting frame through a hinge assembly extending forward and backward through a hinge axis, the lower end of the swing arm is coaxially connected with an adjusting basket bolt, the hammer head comprises a base plate block, a plurality of counterweight plates, a striker, a plurality of first connecting bolts, and a spring, the top of the base plate block is fixedly connected with the lower end of the adjusting basket bolt, the hammer head is formed by fixing a certain number of counterweight plates on the base plate block through the first connecting bolt and the connecting nut, and the mass of the hammer head is flexibly adjusted by installing different numbers of counterweight plates, thereby realizing free adjustment of the impact momentum; the striker is abutted with the counterweight plate on the far right through the spring, realizing elastic buffer design, and the impact stiffness of the hammer head can be adjusted by replacing springs with different stiffnesses. The present invention can be applied to reinforced concrete structure tests.

Description

Technical Field

[0001] The invention relates to the field of reinforced concrete structure testing, in particular to an impact pendulum device. Background Art

[0002] With the rapid development of the national economy, the living standards of the people are getting higher and higher, and the transportation facilities are becoming more and more perfect. The number of highway bridges is increasing day by day, and the number of cross-line bridges and cross-sea bridges is also increasing. Although these traffic settings have facilitated people's travel, the frequency of vehicles hitting bridge piers and cargo ships hitting cross-sea bridges has also increased. The impact tests designed by various researchers for concrete structures such as bridges can be roughly divided into the following categories: one is real vehicles hitting real bridge piers, and the other is the design of impact impact devices hitting model structures. There are roughly two categories in the impact impact device, one is a model car, and the other is an impact pendulum. The existing pendulum design is relatively simple. The disadvantages of the existing pendulum are: the adjustment degree of its swing arm length is small, and it cannot adapt to the impact test under different swing arm lengths; the pendulum mass cannot be freely adjusted, and the impact momentum adjustment is clumsy; the stiffness of the pendulum impact end is not adjustable, and it is often hard contact; the impact data during impact cannot be measured, and is often obtained through theoretical calculations, and the results are unreliable. As a result, it is difficult to control the major impact parameters. During repeated tests, the test data fluctuates greatly, and the experimental accuracy is difficult to guarantee. Summary of the invention

[0003] The purpose of the present invention is to provide an impact pendulum device to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] The technical solutions adopted to solve the above technical problems are:

[0005] An impact pendulum device comprises a mounting frame, a swing arm and a hammer head, the swing arm is vertically arranged, the swing arm is a telescopic rod structure, the upper end of the swing arm is hinged to the mounting frame through a hinge assembly extending forward and backward through a hinge axis, the lower end of the swing arm is coaxially connected with an adjusting basket bolt, the hammer head comprises a base plate block, a plurality of counterweight plates, an impact rod, a plurality of first connecting bolts, and a spring, the top of the base plate block is fixedly connected to the lower end of the adjusting basket bolt, the base plate block is provided with a first through hole and a plurality of first mounting holes, the axes of which are both extended left and right, and a plurality of counterweight plates are evenly arranged on the left side of the base plate block at intervals left and right. On the right side, the counterweight plate is provided with a second through hole coaxially arranged with the first through hole, a plurality of second mounting holes coaxially arranged with the plurality of first mounting holes in one-to-one correspondence, a plurality of first connecting bolts, a plurality of first mounting holes and a plurality of second mounting holes correspond one-to-one respectively, the first connecting bolt passes through the coaxial second mounting hole and the first mounting hole and is threadedly connected with a connecting nut, the left end of the impact rod passes through the second through hole on the right side, the first through hole and the second through hole on the left side from right to left in sequence and is threadedly connected with a locking nut, an impact seat is fixed at the right end of the impact rod, and the spring is sleeved on the impact rod between the impact seat and the rightmost counterweight plate.

[0006] As a further improvement of the above technical solution, the swing arm rod includes an upper rod tube and a lower rod tube which are fitted into each other, the upper rod tube has a plurality of upper connecting holes evenly distributed along the axial direction, the lower rod tube has a plurality of lower connecting holes partially along the axial direction, the lower part of the upper rod tube is connected to the upper part of the lower rod tube by a plurality of second connecting bolts, the second connecting bolts are connected between the corresponding upper connecting holes and the lower connecting holes, the upper end of the upper rod tube is hinged to the mounting frame, and the lower end of the lower rod tube is connected to the upper end of the adjusting basket bolt.

[0007] As a further improvement of the above technical solution, the mounting bracket includes two articulated lifting ears arranged at an interval front to back, the articulated lifting ears are provided with fixing holes with axes delayed front to back, the articulated assembly includes an articulated screw and a sleeve with axes extending front to back, the articulated screw includes two threaded sections respectively arranged at the front and rear ends of the articulated screw, and an optical axis section arranged in the middle of the articulated screw, the sleeve is sleeved on the optical axis section, the front and rear ends of the articulated screw pass through the fixing holes on the two articulated lifting ears and are threadedly connected with fixing nuts, and the upper end of the swing arm rod is fixedly connected to the outer side wall of the middle of the sleeve.

[0008] As a further improvement of the above technical solution, a plurality of positioning holes are provided on the top of the hinged lifting ear.

[0009] As a further improvement of the above technical solution, triangular reinforcement plates are welded on the left and right sides between the upper end of the swing arm and the outer side wall of the sleeve.

[0010] As a further improvement of the above technical solution, a concave hole is opened on the right part of the impact seat, and an impact force sensor is installed in the concave hole. The leftmost counterweight plate is connected to a hammer lifting ear and has a plurality of installation slots, and speed sensors are installed on the plurality of installation slots.

[0011] As a further improvement of the above technical solution, a limiting ring is welded on the right side wall of the rightmost counterweight plate, and the counterweight plate is in contact with the spring via the limiting ring.

[0012] As a further improvement of the above technical solution, the adjusting basket bolt includes four vertically arranged steel bars, two adjusting nuts extending vertically along two axes, and two adjusting screws. The four steel bars are arranged in a rectangular shape when viewed from above, and the two adjusting nuts are vertically arranged between the four steel bars. The steel bars are welded to the outer side walls of the adjusting nuts, and the two adjusting screws are threadedly connected to the two adjusting nuts respectively. The adjusting screw on the upper side is coaxially fixedly connected to the lower end of the swing arm rod, and the adjusting screw on the lower side is fixedly connected to the top of the substrate block.

[0013] The beneficial effects of the present invention are as follows: when in use, the mounting frame is fixed on the steel beam, the telescopic length of the swing arm rod is adjusted to achieve coarse adjustment of the length of the swing arm rod, and the adjusting basket bolt can be rotated to achieve fine adjustment of the length of the swing arm rod, thereby achieving arbitrary adjustment of the length of the swing arm rod and adapting to impact tests under different swing arm lengths. The hammer head is formed by fixing a certain number of counterweight plates on the base plate block through the first connecting bolt and the connecting nut. By installing different numbers of counterweight plates, the mass of the hammer head can be flexibly adjusted, and the impact momentum can be freely adjusted; the impact seat is abutted against the counterweight plate on the far right through a spring to achieve an elastic buffer design, and the impact stiffness of the hammer head can be adjusted by replacing springs with different stiffnesses. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments;

[0015] Figure 1 1 is a side elevation view of an embodiment of the impact pendulum device provided by the present invention, wherein two arrows indicate upward and downward directions, and two arrows indicate left and right directions, respectively;

[0016] Figure 2 yes Figure 1 In the partial enlarged view A, the two arrows indicate upward and downward directions, and the two arrows indicate left and right directions, respectively;

[0017] Figure 3 yes Figure 1 A partial enlarged view of B;

[0018] Figure 41 is a front elevation view of an embodiment of the impact pendulum device provided by the present invention, wherein two arrows indicate upward and downward directions respectively, and two arrows indicate forward and backward directions respectively;

[0019] Figure 5 yes Figure 4 In the partial enlarged view C, the two arrows indicate upward and downward directions, and the two arrows indicate forward and backward directions, respectively;

[0020] Figure 6 This is a right side view of an embodiment of the rightmost counterweight plate provided by the present invention;

[0021] Figure 7 is a side view of an embodiment of the rightmost substrate block provided by the present invention;

[0022] Figure 8 This is a left side view of an embodiment of the leftmost counterweight plate provided by the present invention;

[0023] Fig. 9 The figure is a top view of an embodiment of the rightmost adjusting turnbuckle bolt provided by the present invention. DETAILED DESCRIPTION

[0024] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0025] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In the description of the present invention, if there are words such as "several", it means one or more, "more" means more than two, greater than, less than, exceed, etc. are understood as not including the number, and above, below, within, etc. are understood as including the number.

[0027] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0028] Reference Figures 1 to 9 , an impact pendulum device of the present invention is implemented as follows:

[0029] An impact pendulum device comprises a mounting frame 100, a swing arm 200 and a hammer head 300, wherein the swing arm 200 is arranged vertically, and the swing arm 200 is a telescopic rod structure, wherein the upper end of the swing arm 200 is hinged to the mounting frame 100 through a hinge assembly extending forward and backward through a hinge axis, and the lower end of the swing arm 200 is coaxially connected with an adjusting basket bolt 210, and the hammer head 300 comprises a base plate block 310, a plurality of counterweight plates 320, an impact rod 330, a plurality of first connecting bolts 340, and a spring 350, wherein the top of the base plate block 310 is fixedly connected to the lower end of the adjusting basket bolt 210, and the base plate block 310 is provided with a first through hole 311 and a plurality of first mounting holes 312, both of which are arranged with axes extending left and right, and a plurality of counterweight plates 320 are evenly arranged on the left and right sides of the base plate block 310 in a left-right interval arrangement. On the side, the counterweight plate 320 is provided with a second through hole 321 coaxially arranged with the first through hole 311, and a plurality of second mounting holes 322 coaxially arranged with the plurality of first mounting holes 312, a plurality of first connecting bolts 340, a plurality of first mounting holes 312 and a plurality of second mounting holes 322 respectively correspond to each other, and the first connecting bolt 340 passes through the coaxial second mounting hole 322 and the first mounting hole 312 and is threadedly connected with a connecting nut 341, and the left end of the impact rod 330 passes through the second through hole 321 on the right side, the first through hole 311 and the second through hole 321 on the left side from right to left in sequence and is threadedly connected with a locking nut 331, and an impact seat 332 is fixed at the right end of the impact rod 330, and the spring 350 is sleeved on the impact rod 330 between the impact seat 332 and the rightmost counterweight plate 320.

[0030] When in use, the mounting frame 100 is fixed on the steel beam, and the telescopic length of the swing arm rod 200 is adjusted to achieve coarse adjustment of the length of the swing arm rod 200. The basket bolt 210 can also be rotated to adjust the length of the swing arm rod 200, thereby achieving arbitrary adjustment of the length of the swing arm rod 200 and adapting to impact tests under different swing arm lengths. The hammer head 300 is formed by fixing a certain number of counterweight plates 320 on the base plate block 310 through the first connecting bolt 340 and the connecting nut 341. By installing different numbers of counterweight plates 320, the mass of the hammer head 300 can be flexibly adjusted, and the impact momentum can be freely adjusted; the impact seat 332 is abutted against the rightmost counterweight plate 320 through the spring 350 to achieve an elastic buffer design, and the impact stiffness of the hammer head 300 can be adjusted by replacing the springs 350 with different stiffnesses.

[0031] In some embodiments, the swing arm rod 200 includes an upper rod tube 220 and a lower rod tube 230 that are fitted together. The upper rod tube 220 has a plurality of upper connecting holes 221 evenly distributed along the axial direction, and the lower rod tube 230 has a plurality of lower connecting holes locally along the axial direction. The lower part of the upper rod tube 220 and the upper part of the lower rod tube 230 are connected by a plurality of second connecting bolts 240, and the second connecting bolts 240 are connected between the corresponding upper connecting holes 221 and the lower connecting holes. The upper end of the upper rod tube 220 is hinged to the mounting frame 100, and the lower end of the lower rod tube 230 is connected to the upper end of the adjusting basket bolt 210. When roughly adjusting the length of the swing arm rod 200, unscrew the second connecting bolt 240, then adjust the telescopic length between the upper rod tube 220 and the lower rod tube 230, and make the corresponding upper connecting hole 221 correspond to the corresponding lower connecting hole one by one, and then connect the corresponding second connecting bolt 240 between the corresponding upper connecting hole 221 and the lower connecting hole to achieve locking and fixation between the upper rod tube 220 and the lower rod tube 230.

[0032] In some embodiments, the mounting bracket 100 includes two articulated ears 110 spaced apart in front and back, the articulated ears 110 are provided with fixing holes with axes delayed in front and back, the articulated assembly includes an articulated screw 400 and a sleeve 500 with axes extending in front and back, the articulated screw 400 includes two threaded sections 410 respectively arranged at the front and rear ends of the articulated screw 400, and an optical axis section arranged in the middle of the articulated screw 400, the sleeve 500 is sleeved on the optical axis section, the front and rear ends of the articulated screw 400 pass through the fixing holes on the two articulated ears 110 and are threadedly connected with fixing nuts 430, and the upper end of the swing arm rod 200 is fixedly connected to the outer side wall in the middle of the sleeve 500. During the test, two hinged lifting ears 110 are installed on the steel beam at intervals in front and back, and the sleeve 500 is connected to the two hinged lifting ears 110 by using the hinge screw 400. Lubricating oil is applied to the inner wall of the sleeve 500 to form a hinge node with a single degree of freedom swing.

[0033] In some embodiments, a plurality of positioning holes are provided on the top of the hinged lifting lug 110. The hinged lifting lug 110 is fixedly connected to the steel beam by bolts passing through the positioning holes on the hinged lifting lug 110.

[0034] In some embodiments, triangular reinforcement plates 510 are welded on the left and right sides between the upper end of the swing arm 200 and the outer side wall of the sleeve 500. The swing arm 200 and the sleeve 500 are welded, and two triangular reinforcement plates 510 are added at the welding point to reinforce the node.

[0035] In some embodiments, a concave hole is provided at the right part of the impact seat 332, and an impact force sensor is installed in the concave hole. The leftmost counterweight plate 320 is connected to a hammer lifting lug 323 and has a plurality of mounting slots 324, and a velocity sensor is installed on the plurality of mounting slots 324. A piezoelectric impact force sensor is pre-installed on the impact surface of the impact seat 332, and an acceleration sensor or a velocity sensor is installed at the tail of the hammer head 300, so that the physical parameters of the hammer head 300 when impacting the component can be monitored throughout the process.

[0036] In some embodiments, a limiting ring 325 is welded on the right side wall of the rightmost counterweight plate 320, and the counterweight plate 320 abuts against the spring 350 through the limiting ring 325. The limiting ring 325 can limit the spring 350.

[0037] In some embodiments, the adjusting basket bolt 210 includes four vertically arranged steel bars 211, two adjusting nuts 212 extending up and down with axes, and two adjusting screws 213. The four steel bars 211 are arranged in a rectangular shape when viewed from above, and the two adjusting nuts 212 are arranged up and down between the four steel bars 211. The steel bars 211 are welded to the outer walls of the adjusting nuts 212. The two adjusting screws 213 are threadedly connected to the two adjusting nuts 212 respectively. The adjusting screw 213 on the upper side is coaxially fixedly connected to the lower end of the swing arm rod 200, and the adjusting screw 213 on the lower side is fixedly connected to the top of the substrate block 310.

[0038] The use process of this impact pendulum device is:

[0039] First, two hinged lifting eyes 110 are installed under the steel beam by bolts;

[0040] Pass the hinge screw 400 through the sleeve 500 at the upper end of the swing arm 200 and the fixing hole on the hinge lug 110, and then tighten the fixing nuts 430 at both ends of the hinge screw 400 to complete the installation of the swing arm 200 rotation point;

[0041] Install the upper rod tube 220 and the lower rod tube 230, select the corresponding positions of the upper connecting hole 221 and the lower connecting hole, and connect the second connecting bolt 240 between the corresponding upper connecting hole 221 and the lower connecting hole;

[0042] Connect the adjusting turnbuckle bolt 210 to the base plate block 310, and fine-tune the length of the swing arm 200 by adjusting the turnbuckle bolt 210. After the adjustment is completed, tighten the adjusting turnbuckle bolt 210;

[0043] A certain number of counterweight plates 320 are fixed on the base plate block 310 by means of first connecting bolts 340 and connecting nuts 341;

[0044] The impact rod 330 is passed through the spring 350, the right counterweight plate 320, the base plate 310, and the left counterweight plate 320 at one time, and finally tightened by the locking nut 331;

[0045] The impact force sensor is mounted on the impact seat 332, and the acceleration sensor and the velocity sensor are mounted on the tail of the hammer head 300;

[0046] The hammer lifting lug 323 is connected by a rope, and when the hammer head 300 is raised to a predetermined height, the hook is instantly released, and the hammer head 300 hits the test piece under the action of its own weight to complete the impact.

[0047] The preferred embodiments of the present invention are specifically described above, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An impact pendulum device, characterized in that: include: Mounting bracket (100); The swing arm rod (200) is arranged vertically, and the swing arm rod (200) is a telescopic rod structure. The upper end of the swing arm rod (200) is hingedly connected to the mounting frame (100) via a hinge assembly extending forward and backward along a hinge axis, and the lower end of the swing arm rod (200) is coaxially connected to an adjusting turnbuckle bolt (210); The hammer head (300) comprises a base block (310), a plurality of counterweight plates (320), a striking rod (330), a plurality of first connecting bolts (340), and a spring (350); the top of the base block (310) is fixedly connected to the lower end of the adjusting basket bolt (210); the base block (310) is provided with a first through hole (311) and a plurality of first mounting holes (312) whose axes are both extended left and right; the plurality of counterweight plates (320) are arranged at intervals left and right and are evenly arranged on the left and right sides of the base block (310); the counterweight plate (320) is provided with a second through hole (321) coaxially arranged with the first through hole (311), and a plurality of second mounting holes coaxially arranged in a one-to-one correspondence with the plurality of first mounting holes (312). (322), a plurality of first connecting bolts (340), a plurality of first mounting holes (312) and a plurality of second mounting holes (322) correspond to each other one by one, the first connecting bolts (340) pass through the coaxial second mounting holes (322) and the first mounting holes (312) and are then threadedly connected with a connecting nut (341), the left end of the impact rod (330) passes through the second through hole (321) on the right side, the first through hole (311) and the second through hole (321) on the left side in sequence from right to left and is then threadedly connected with a locking nut (331), a strike seat (332) is fixed at the right end of the impact rod (330), and the spring (350) is sleeved on the impact rod (330) between the strike seat (332) and the rightmost counterweight plate (320); The swing arm rod (200) comprises an upper rod tube (220) and a lower rod tube (230) which are fitted together, the upper rod tube (220) being evenly distributed with a plurality of upper connection holes (221) along the axial direction, the lower rod tube (230) being partially provided with a plurality of lower connection holes along the axial direction, the lower portion of the upper rod tube (220) being connected to the upper portion of the lower rod tube (230) via a plurality of second connection bolts (240), the second connection bolts (240) being connected between the corresponding upper connection holes (221) and the lower connection holes, the upper end of the upper rod tube (220) being hinged to the mounting frame (100), and the lower end of the lower rod tube (230) being connected to the upper end of the adjusting basket bolt (210); The mounting frame (100) comprises two hinged lifting ears (110) arranged at a front-to-back interval, the hinged lifting ears (110) are provided with fixing holes whose axes are arranged in a front-to-back delayed manner, the hinge assembly comprises a hinged screw (400) and a sleeve (500) whose axes both extend in a front-to-back manner, the hinged screw (400) comprises two threaded sections (410) respectively arranged at the front and rear ends of the hinged screw (400), and an optical axis section arranged in the middle of the hinged screw (400), the sleeve (500) is sleeved on the optical axis section, the front and rear ends of the hinged screw (400) pass through the fixing holes on the two hinged lifting ears (110) and are threadedly connected to fixing nuts (430), and the upper end of the swing arm rod (200) is fixedly connected to the outer side wall in the middle of the sleeve (500); A plurality of positioning holes are provided on the top of the hinged lifting ear (110); A triangular reinforcement plate (510) is welded on the left and right sides between the upper end of the swing arm (200) and the outer side wall of the sleeve (500); A concave hole is provided on the right side of the impact seat (332), and an impact force sensor is installed in the concave hole; the leftmost counterweight plate (320) is connected to a hammer lifting lug (323) and has a plurality of mounting slots (324); and speed sensors are installed on the plurality of mounting slots (324); A limiting ring (325) is welded to the right side wall of the rightmost counterweight plate (320); the counterweight plate (320) abuts against the spring (350) via the limiting ring (325) to achieve an elastic buffer design, and the impact stiffness of the hammer head (300) can be adjusted by replacing the spring (350) with different stiffness; The adjusting turnbuckle bolt (210) comprises four steel bars (211) arranged vertically, two adjusting nuts (212) extending vertically along two axes, and two adjusting screws (213). The four steel bars (211) are arranged in a rectangular shape in a plan view. The two adjusting nuts (212) are arranged vertically between the four steel bars (211). The steel bars (211) are welded to the outer side walls of the adjusting nuts (212). The two adjusting screws (213) are respectively threadedly connected to the two adjusting nuts (212). The adjusting screw (213) on the upper side is coaxially fixedly connected to the lower end of the swing arm rod (200), and the adjusting screw (213) on the lower side is fixedly connected to the top of the base plate block (310).

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