CN113532819B - Safety helmet tension-compression testing machine - Google Patents
Safety helmet tension-compression testing machine Download PDFInfo
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- CN113532819B CN113532819B CN202110690226.9A CN202110690226A CN113532819B CN 113532819 B CN113532819 B CN 113532819B CN 202110690226 A CN202110690226 A CN 202110690226A CN 113532819 B CN113532819 B CN 113532819B
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- 238000007906 compression Methods 0.000 title claims abstract description 23
- 230000006835 compression Effects 0.000 claims abstract description 11
- 230000003014 reinforcing effect Effects 0.000 claims description 105
- 230000002787 reinforcement Effects 0.000 claims description 46
- 238000001514 detection method Methods 0.000 claims description 25
- 238000009434 installation Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 230000003028 elevating effect Effects 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims description 4
- 238000004873 anchoring Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 18
- 235000017491 Bambusa tulda Nutrition 0.000 description 18
- 241001330002 Bambuseae Species 0.000 description 18
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 18
- 239000011425 bamboo Substances 0.000 description 18
- 230000000630 rising effect Effects 0.000 description 6
- 239000007787 solid Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a safety helmet tension-compression testing machine, which comprises a frame, wherein a fixing mechanism, a testing mechanism and a lifting mechanism are arranged on the frame, the fixing mechanism is arranged at the upper end of the frame, the testing mechanism is arranged at the lower side of the fixing mechanism, the lifting mechanism drives the testing mechanism to move up and down, the fixing mechanism comprises a fixing cylinder, a fixing cap seat and a fixing assembly, the fixing cylinder is horizontally and rotatably arranged on the frame, the fixing cap seat is fixedly arranged on the outer side wall of the fixing cylinder, and the fixing assembly is arranged on the fixing cylinder and can keep the fixing cylinder fixed relative to the frame; the test mechanism comprises a test table, a test disc and a test assembly, wherein the test table is arranged on the rack in a vertical sliding mode, and the test disc is rotatably arranged on the top surface of the test table. The safety helmet can greatly save the time for disassembling and replacing the testing assembly and the fixing cap seat, and is convenient for rapidly detecting the tension and compression performance of a single safety helmet.
Description
Technical Field
The invention relates to the field of safety helmet detection equipment, in particular to a safety helmet tension-compression testing machine.
Background
The safety helmet is a shallow dome hat made of steel or similar materials and used for protecting the top of the head, and consists of a helmet shell, a helmet liner, a lower cheek band and a rear hoop. The cap shell is hemispherical, and the impact and puncture kinetic energy of the hit objects is mainly borne by the cap shell. A certain space is reserved between the cap shell and the cap liner, and the instantaneous impact force can be buffered and dispersed, so that the direct damage to the head is avoided or reduced. The tension and compression performance is a requirement for the basic technical performance of the safety helmet.
At present, in order to test the tension and compression performance of the safety helmet, a safety helmet tension and compression testing machine is often required to be used. As shown in fig. 1, the safety helmet tensile and compressive testing machine generally comprises a frame, a fixing frame is installed at the upper part of the frame, a testing frame is installed at the lower part of the frame, a lifting assembly for driving the testing frame to move up and down is also installed on the frame, the fixing frame is used for installing a safety helmet, and a detection head for detecting the strength of the safety helmet is installed on the testing frame. The detection head is usually a tension sensor provided with a hook or a pressure sensor provided with a thin steel column. When the stability degree of connection between the cap hoop of the safety helmet and the safety helmet is required to be measured, the detection head is replaced by a tension sensor, a hook on the tension sensor hooks the cap hoop of the safety helmet, and then the test frame is driven to be far away from the safety helmet until the cap hoop is separated from the safety helmet, and the numerical value of the tension sensor is read. When the pressure resistance of the safety helmet needs to be measured, the detection head is replaced by the pressure sensor, then the test frame is driven to be close to the safety helmet, the thin steel column is extruded to the safety helmet, and the value of the pressure sensor is read until the safety helmet is damaged.
With respect to the above related art, the inventor considers that at present, when the tension and compression performance of the safety helmet is measured, the position where the safety helmet is installed needs to be replaced midway, and there is a problem that the time spent in adjusting the fixing frame and the detecting head is relatively long, and the tension and compression performance of the single safety helmet is inconvenient to detect quickly.
Disclosure of Invention
In order to improve the problem that the time spent is more when adjusting mount and detecting the head, the quick tension and compression performance to single safety helmet detection of inconvenience, this application provides a safety helmet tension and compression testing machine.
The application provides a safety helmet draws pressure test machine adopts following technical scheme:
the safety helmet tension-compression testing machine comprises a frame, wherein a fixing mechanism, a testing mechanism and a lifting mechanism are arranged on the frame, the fixing mechanism is arranged at the upper end of the frame, the testing mechanism is arranged at the lower side of the fixing mechanism, the lifting mechanism drives the testing mechanism to move up and down, the fixing mechanism comprises a fixing cylinder, a fixing cap seat and a fixing assembly, the fixing cylinder is horizontally and rotatably arranged on the frame, the fixing cap seat is fixedly arranged on the outer side wall of the fixing cylinder, and the fixing assembly is arranged on the fixing cylinder and can keep the fixing cylinder fixed relative to the frame; the testing mechanism comprises a testing table, a testing disc and a testing component, wherein the testing table is installed on the machine frame in a vertical sliding mode, the testing disc is installed on the top surface of the testing table in a rotating mode, the testing component is divided into a tension detecting head and a pressure detecting head, the tension detecting head and the pressure detecting head are all installed at the edge of the testing disc, the tension detecting head comprises a tension sensor and a tension hook, the tension sensor is fixedly installed on the testing disc, the tension hook is fixedly installed at the upper end of the tension sensor, the pressure detecting head comprises a pressure sensor and a pressure column, the pressure sensor is fixedly installed on the testing disc, and the pressure column is vertically and fixedly installed on the top surface of the pressure sensor.
Through adopting above-mentioned technical scheme, with pulling force detection head and pressure detection head all install on the test disc, and fixed cap seat fixed mounting is on the fixed section of thick bamboo that rotates the setting, when needs detect, can pass through rotatory test disc and fixed cap seat to the position of convenient regulation test assembly. When the connection strength between the helmet hoop and the safety helmet is required to be detected, the tension detection head is rotated to the lower part of the fixed helmet seat, the fixed helmet seat is positioned on the top surface of the fixed barrel, and after the safety helmet is mounted on the fixed helmet seat, the helmet hoop of the safety helmet can be easily hooked by the tension hook. When the compressive capacity of the safety helmet needs to be detected, the pressure detection head is rotated to the lower side of the fixing cap seat, the fixing cap seat is positioned on the bottom surface of the fixing barrel, the safety helmet is fixedly installed on the fixing cap seat, the opening of the safety helmet is vertically upwards, and the pressure column can be easily abutted to the safety helmet. The safety helmet can greatly save the time for disassembling and replacing the testing assembly and the fixing cap seat, and is convenient for rapidly detecting the tension and compression performance of a single safety helmet.
Optionally, fixed subassembly include solid fixed ring and fixed pin, gu fixed ring is provided with one with all fixing on the fixed section of thick bamboo lateral surface in the frame, two solid fixed rings are parallel to each other and the axis collineation, all seted up the fixed pinhole on the solid fixed ring, fixed pin can wear to establish the fixed pinhole on two solid fixed rings simultaneously.
Through adopting above-mentioned technical scheme, through passing the fixed pin on two solid fixed rings simultaneously, make the position of two fixed blocks keep fixed to make the fixed section of thick bamboo keep fixed for the frame, can not rotate along the axis of fixed section of thick bamboo, thereby can fix the fixed cap seat of installing on the fixed section of thick bamboo, be convenient for follow-up detection.
Optionally, the testing mechanism still include and consolidate the subassembly, consolidate the subassembly and including consolidating the grip block, consolidate a section of thick bamboo and consolidate the stay cord, consolidate the grip block horizontal slip and set up on the testboard top surface, consolidate the grip block and be provided with two, and set up relatively in the both sides of test disc, consolidate the slip direction of grip block towards the center department of test disc, consolidate the grip block and offered long banding grip groove on being close to the side of test disc, grip groove horizontal setting, and both ends all coincide with the side of consolidating the grip block about the grip groove, consolidate the grip block and remove to the adjacent position department with test disc, the edge of test disc all inlays and establishes in the grip groove, consolidate a section of thick bamboo fixed mounting on the bottom surface of test disc, and consolidate the axis collineation of section of thick bamboo and test disc, consolidate one end of stay cord is first end, and consolidate a section of thick bamboo and be connected, consolidate the other end of stay cord is the second end, and be connected with consolidate the grip block, consolidate the grip block and can make and consolidate the stay cord winding on consolidating a section of thick bamboo, and pulling consolidate the grip block and adjacent with test disc.
Through adopting above-mentioned technical scheme, consolidate the section of thick bamboo and install on the bottom surface of test disc, make consolidate the section of thick bamboo and can rotate along with test disc in the lump, connect the reinforcement stay cord on consolidate the section of thick bamboo and be difficult for interfering with test assembly. The reinforcing cylinder can be wound on the reinforcing cylinder when rotating, so that the reinforcing clamping block is pulled to move towards the test disc until the edge of the test disc is embedded in the clamping groove. In the case that the test components are all installed at the edge of the test disc, the test disc is easily damaged by tilting when the test is performed. The edge of the test disc is embedded in the clamping groove, so that the test disc can be supported during detection, and the test disc is well protected.
Optionally, a reinforcing chute is formed on the top surface of the test bench, and the reinforcing clamping block is embedded in the reinforcing chute and moves along the reinforcing chute; the width of the opening of the reinforcing chute is larger than the width of the widest part in the cross section of the reinforcing chute, a reinforcing rack is fixedly arranged on the inner side wall of the reinforcing chute, the side face provided with teeth in the reinforcing rack is attached to the reinforcing clamping block, the teeth in the reinforcing rack incline towards one side close to the test disc, a reinforcing lock hole is formed in the adjacent side face of the reinforcing clamping block and the reinforcing rack, a reinforcing lock tongue is arranged in the reinforcing lock hole, and a reinforcing elastic piece which is used for pushing the reinforcing lock tongue to stretch out is arranged in the reinforcing lock hole.
Through adopting above-mentioned technical scheme, make consolidate the stable removal of grip block along consolidating the spout, when consolidate the grip block and remove, consolidate the elastic component and can promote to consolidate spring bolt and centre gripping rack laminating to because consolidate the tooth in the rack and incline towards the one side that is close to the test disc, thereby make consolidate the grip block and only can remove along the one side towards the test disc. And when the reinforcing clamping block moves to the position for supporting the test disc, the position of the reinforcing clamping block is stable, the phenomenon of deflection is not easy to occur, and the test disc is well supported.
Optionally, the side surface of the inner side wall of the clamping groove, which is positioned at the upper side, is an upper bottom surface, the side surface of the inner side wall of the clamping groove, which is positioned at the lower side, is a lower bottom surface, and the height of one side, which is close to the test disc, of the upper bottom surface is higher than the height of one side, which is far from the test disc, of the other side, which is close to the test disc, of the lower bottom surface is lower than the height of one side, which is far from the test disc.
Through adopting above-mentioned technical scheme, because the last bottom surface and the lower bottom surface of grip slot are the inclined plane, when consolidate the grip block and remove to can with the adjacent position department of test disc, can be through the last bottom surface and the stable centre gripping of lower bottom surface of grip slot test disc, make test disc and consolidate the structure between the grip block and keep stable.
Optionally, the top surface of the test bench is provided with a mounting groove, the bottom surface of the mounting groove is provided with a reinforcing groove, the diameter of the reinforcing groove is smaller than that of the mounting groove, and the lower end of the reinforcing cylinder is arranged in the reinforcing groove in a penetrating manner; the bottom surface of the reinforcing groove is provided with a lower limit groove, the bottom surface of the lower end of the reinforcing cylinder is fixedly provided with a lower limit block, the cross sections of the lower limit groove and the lower limit block are fan-shaped, the length of the lower limit block is smaller than that of the lower limit groove, the bottom surface of the lower limit block and the bottom surface of the lower limit groove are inclined surfaces and can be tightly attached, and the inclined surfaces are gradually raised along the clockwise or anticlockwise direction; the upper limiting block is fixedly arranged on the outer side wall of the reinforcing cylinder, the upper limiting block is located in the mounting groove, the upper guide block is fixedly arranged on the inner side wall of the mounting groove, the cross sections of the upper limiting block and the upper guide block are fan-shaped, the length of the upper limiting block is smaller than that of the upper guide block, the top surface of the upper limiting block and the bottom surface of the upper guide block are inclined surfaces and can be tightly attached, the gradually rising direction of the inclined surface of the upper limiting block is the same as the gradually rising direction of the inclined surface of the lower limiting groove, when the test disc rotates to the position of the pressure detection head located at the lower side of the fixing mechanism, the gradually rising direction of the inclined surface of the lower limiting groove is opposite to the gradually rising direction of the inclined surface of the second end to the first end in the reinforcing pull rope, and when the test disc rotates to the position of the tension detection head located at the lower side of the fixing mechanism, the gradually rising direction of the second end to the first end in the reinforcing pull rope is the same as the gradually rising direction of the inclined surface of the lower limiting groove.
Through adopting above-mentioned technical scheme, consolidate the section of thick bamboo and wear to establish in consolidate the inslot and can rotate along self axis to drive the test disc and rotate. When detecting the joint strength between cap hoop and the safety helmet, whole test disc is being driven upwards to remove, and the top surface of last stopper and the laminating of the bottom surface of last guide block this moment make the bottom surface of going up the guide block follow and go up the guide block and remove to the eminence to make whole test disc rotate towards the direction that the bottom surface height of last guide block risees gradually. Because when the test disc rotates to the position that the tension detection head is located the fixed establishment downside, the direction that the second end to the first end in the reinforcement stay cord twined on the reinforcement section of thick bamboo is the same with the direction that the inclined plane height of lower spacing groove risees gradually, therefore when the test disc rotated towards the direction that the bottom surface height of upper guide block risees gradually, can take up the reinforcement stay cord gradually, make two consolidate the clamping block and move towards one side that is close to test disc center department, the last bottom surface and the lower bottom surface of cooperation clamping groove, the support that can be more stable has the test disc.
When the pressure resistance of the safety helmet needs to be detected, the whole test disc is driven to move downwards, and at the moment, the bottom surface of the lower limiting block is attached to the bottom surface of the lower limiting groove, so that the lower limiting block moves from high to low along the bottom surface of the lower limiting groove, and the whole test disc rotates towards the direction that the height of the bottom surface of the lower limiting groove is gradually reduced. Because when the test disc rotates to the position that the pressure detection head is located the fixed establishment downside, consolidate the direction that the second end to first end twined on the reinforcement section of thick bamboo and the inclined plane height of lower spacing groove rise gradually the opposite direction in the stay cord, consequently the test disc rotates towards the direction that the bottom surface height of lower spacing groove reduces gradually, can take up gradually and consolidate the stay cord, makes two anchor clamps removal towards one side that is close to test disc center department, and the last bottom surface and the lower bottom surface of cooperation grip groove support the test disc that can be more stable.
Optionally, the frame on install telescopic machanism, telescopic machanism includes expansion bracket, telescopic link, flexible anchor nail, expansion bracket level and slidable mounting in the frame, telescopic link level and fixed mounting are on the expansion bracket, and the axis of telescopic link is parallel with the direction of movement of expansion bracket, flexible anchor nail installs on the expansion bracket to can with the frame butt, make the expansion bracket keep fixedly for the frame, fixed cylinder level and rotation are installed on the telescopic link.
Through adopting above-mentioned technical scheme, through removing the expansion bracket, can drive the telescopic link and remove, and then make the fixed section of thick bamboo of rotating and installing on the telescopic link also remove in the lump, when detecting the safety helmet of installing on the fixed section of thick bamboo, can calibrate the position of safety helmet, make the safety helmet can align with test assembly.
Optionally, elevating system include lifting base, lifting screw and elevator motor, lifting base is along vertical direction slidable mounting in the frame, has seted up the lift screw hole of vertical setting on the lifting base, lifting screw is vertical to rotate and install in the frame, and lifting screw wears to establish at lifting screw hole, elevator motor drives lifting screw and rotates.
Through adopting above-mentioned technical scheme, through starting elevator motor, can drive the lift lead screw and rotate. Lifting base matched with threads of lifting screw rod can stably rise and fall, and detection is facilitated.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the safety helmet can greatly save the time for disassembling and replacing the testing assembly and the fixing cap seat, and is convenient for rapidly detecting the tension and compression performance of a single safety helmet.
2. The test disc can be supported more stably.
Drawings
Fig. 1 is a schematic structural view of an embodiment.
Fig. 2 is a schematic structural view of the telescopic mechanism and the fixing mechanism.
Fig. 3 is a schematic structural view of the test mechanism.
Fig. 4 is a schematic structural diagram of the tensile force detecting head after hiding part of the test stand and when the tensile force detecting head is located at the lower side of the fixing cap seat.
Fig. 5 is a schematic installation view of the reinforcing tongue.
Fig. 6 is a schematic structural diagram of the pressure detecting head after hiding part of the test stand and when the pressure detecting head is located at the lower side of the fixing cap.
Reference numerals illustrate: 1. a frame; 2. a telescoping mechanism; 21. a telescopic cylinder; 22. a telescopic frame; 23. a telescopic rod; 24. a telescopic anchoring nail; 25. a unit bar; 3. a fixing mechanism; 31. a fixed cylinder; 32. fixing the cap seat; 33. a fixing assembly; 331. a fixing ring; 332. fixing pins; 333. a fixing pin hole; 4. a lifting mechanism; 41. a lifting plate; 42. lifting a base; 43. lifting the screw rod; 44. a lifting motor; 5. a testing mechanism; 51. a test bench; 511. a mounting groove; 512. a reinforcing groove; 52. testing the disc; 53. a testing component; 531. a tension detecting head; 5311. a tension sensor; 5312. a tension hook; 532. a pressure detection head; 5321. a pressure sensor; 5322. a pressure column; 6. a reinforcement assembly; 61. a reinforcement cylinder; 62. reinforcing the chute; 63. reinforcing the clamping blocks; 631. a clamping groove; 64. reinforcing the rack; 641. reinforcing a lock hole; 642. reinforcing the elastic member; 643. reinforcing the lock tongue; 65. reinforcing a pull rope; 66. a lower limit groove; 661. a lower limiting block; 67. an upper guide block; 671. and an upper limiting block.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-6.
The embodiment of the application discloses a safety helmet tension-compression testing machine. Referring to fig. 1 and 2, the helmet tension-compression testing machine comprises a frame 1, and a telescopic mechanism 2, a fixing mechanism 3, a lifting mechanism 4 and a testing mechanism 5 are arranged on the frame 1. Wherein, fixed establishment 3 and telescopic machanism 2 all set up in the upper end department of frame 1, and test mechanism 5 sets up in the lower extreme department of frame 1 and is located the downside of fixed establishment 3, and elevating system 4 drive test mechanism 5 reciprocates.
Referring to fig. 1 and 2, the telescopic mechanism 2 includes a telescopic cylinder 21, a telescopic frame 22, a telescopic rod 23, and a telescopic anchor pin 24; the telescopic cylinder 21 is fixedly arranged at the upper end of the frame 1, and the axis of the telescopic cylinder 21 is horizontally arranged. The telescopic frame 22 is integrally formed with a unit rod 25, and the unit rod 25 is inserted into the telescopic tube 21 and is movable along the axis of the telescopic tube 21. The telescopic rod 23 is integrally formed on the telescopic frame 22, and the telescopic rod 23 is parallel to the unit rod 25. The telescopic anchor nail 24 passes through the telescopic cylinder 21 and can be abutted against the unit rod 25, so that the position of the unit rod 25 is kept fixed.
Referring to fig. 1 and 2, the fixing mechanism 3 includes a fixing barrel 31, a fixing cap 32, and a fixing assembly 33, where the fixing barrel 31 is sleeved on the telescopic rod 23 and can rotate with the axis of the telescopic rod 23 as a rotation axis. The fixing cap 32 is fixedly installed on the outer side surface of the fixing cylinder 31. The fixing cylinder 31 can be rotated to adjust the angle of the fixing cap 32. The fixing assembly 33 includes fixing rings 331 and fixing pins 332, one fixing ring 331 is integrally formed on each of one end of the telescopic rod 23 and the outer side surface of the fixing cylinder 31, and the two fixing rings 331 are parallel to each other. The two fixing rings 331 are provided with fixing pin holes 333, and the fixing pins 332 are arranged in the fixing pin holes 333 in a penetrating manner. When the fixing cap 32 rotates to the upper side of the fixing barrel 31 and the lower side of the fixing barrel 31, the fixing pins 332 can be simultaneously inserted into the fixing pin holes 333 on the two fixing rings 331, so that the fixing barrel 31 can not rotate along the axis thereof, and the position of the fixing barrel 31 is fixed.
Referring to fig. 1 and 2, the lifting mechanism 4 includes a lifting plate 41, a lifting base 42, a lifting screw 43 and a lifting motor 44, the lifting plate 41 is vertically installed on the frame 1, lifting guide rails vertically arranged are respectively installed on the left side edge and the right side edge of the lifting plate 41, the lifting base 42 is slidably installed on the lifting guide rails, lifting threaded holes vertically arranged are formed in the lifting base 42, the lifting screw 43 is vertically and rotatably installed on the frame 1, and the lifting screw 43 is in threaded fit with the inner side wall of the lifting threaded holes, and the lifting motor 44 drives the lifting screw 43 to rotate.
Referring to fig. 3 and 4, the test mechanism 5 includes a test bed 51, a test disc 52, a test assembly 53, and a reinforcement assembly 6. The test stand 51 is fixedly mounted on the elevation base 42. A circular mounting groove 511 is formed in the center of the top surface of the test board 51, a circular reinforcing groove 512 is formed in the bottom surface of the mounting groove 511, and the diameter of the reinforcing groove 512 is smaller than that of the mounting groove 511. The reinforcing component 6 comprises a reinforcing cylinder 61, the reinforcing cylinder 61 is integrally formed on the bottom surface of the test disc 52, and the reinforcing cylinder 61 is arranged in the reinforcing groove 512 in a penetrating manner and can rotate along the axis of the reinforcing groove 512, so that the test disc 52 is driven to rotate. The test assembly 53 includes a tension test head 531 and a pressure test head 532, both the tension test head 531 and the pressure test head 532 are disposed at the edge of the test disc 52, and the positions of the tension test head 531 and the pressure test head 532 are disposed opposite to each other. The tension detecting head 531 includes a tension sensor 5311 and a tension hook 5312, the tension sensor 5311 being fixedly mounted on the top surface of the test disc 52, the tension hook 5312 being fixedly mounted on the top surface of the tension sensor 5311. The pressure detection head 532 includes a pressure sensor 5321 and a pressure column 5322, the pressure sensor 5321 being fixedly mounted on the top surface of the test disc 52, and the pressure column 5322 being fixedly mounted on the top surface of the pressure sensor 5321.
Referring to fig. 4 and 5, the reinforcement assembly 6 includes a reinforcement chute 62 formed on the top surface of the test stand 51, and the reinforcement chute 62 has a long strip shape and an inverted T-shaped groove structure. The reinforcement slide grooves 62 are provided one on each side of the installation groove 511, and the axes of the two reinforcement slide grooves 62 are collinear and pass through the axis of the installation groove 511. A reinforcing clamping block 63 is slidably mounted in each of the two reinforcing sliding grooves 62. The side surface of the reinforcing clamping block 63, which is close to the test disc 52, is provided with a long clamping groove 631, the clamping groove 631 is horizontally arranged, and the left end and the right end of the clamping groove 631 are overlapped with the side surface of the reinforcing clamping block 63. The side surface of the inner side wall of the clamping groove 631, which is positioned at the upper side, is an upper bottom surface, the side surface of the upper bottom surface, which is positioned at the lower side, is higher than the side far from the test disc 52, and the side of the lower bottom surface, which is positioned at the lower side, is lower than the side far from the test disc 52. When the reinforcing clamping block 63 is moved to a position adjacent to the test disc 52, the edge of the test disc 52 is embedded in the clamping groove 631. A reinforcement rack 64 is fixedly installed on the bottom surface of the reinforcement chute 62, and a side surface having teeth in the reinforcement rack 64 is located on the upper side, and the teeth in the reinforcement rack 64 are inclined toward a side near the test disc 52. A reinforcing lock hole 641 is formed in the bottom surface of the reinforcing clamp block 63, a spring serving as a reinforcing elastic member 642 is installed in the reinforcing lock hole 641, and a reinforcing lock tongue 643 is installed at one end of the reinforcing elastic member 642 away from the bottom surface of the reinforcing lock hole 641. The reinforcing elastic member 642 can push the reinforcing latch 643 to protrude into the reinforcing latch hole 641, thereby tightly fitting the reinforcing latch 643 with the teeth in the reinforcing rack 64. The reinforcement clip 63 can move only along the reinforcement chute 62 toward one side at the center of the test disc 52 with the cooperation of the reinforcement rack 64 and the reinforcement tongue 643. The reinforcing locking tab 643 may be pulled back into the reinforcing locking aperture 641 when reverse movement is desired. The reinforcement rope 65 is connected to the outer side surface of the reinforcement cylinder 61, the reinforcement rope 65 has a first end and a second end at both ends, the first end of the reinforcement rope 65 is connected to the reinforcement cylinder 61, and the second end of the reinforcement rope 65 is connected to the reinforcement clamp block 63. The reinforcement cylinder 61 is rotated and the reinforcement cord 65 is wound around the reinforcement cylinder 61 and pulls the reinforcement clamp block 63 adjacent to the test disc 52.
Referring to fig. 4 and 6, a lower limit groove 66 is formed in the bottom surface of the reinforcement groove 512, and a lower limit block 661 is fixedly mounted on the bottom surface of the lower end of the reinforcement cylinder 61. The cross sections of the lower limit groove 66 and the lower limit block 661 are fan-shaped, the length of the lower limit block 661 is smaller than that of the lower limit groove 66, and the bottom surface of the lower limit block 661 and the bottom surface of the lower limit groove 66 are inclined surfaces and can be tightly attached. From the top view, the bottom surface of the lower stopper 661 gradually rises in height in the clockwise direction. An upper guide block 67 is fixedly installed on the inner side wall of the installation groove 511, an upper limit block 671 is fixedly installed on the outer side wall of the reinforcement cylinder 61, and the upper limit block 671 is located in the installation groove 511. The cross sections of the upper limiting block 671 and the upper guide block 67 are fan-shaped, the length of the upper limiting block 671 is smaller than that of the upper guide block 67, and the top surface of the upper limiting block 671 and the bottom surface of the upper guide block 67 are inclined surfaces and can be tightly attached. The bottom surface of the upper stopper 671 is also gradually raised in height in the clockwise direction.
Referring to fig. 4 and 6, when the test disc 52 is rotated to a position where the tension detecting head 531 is located at the lower side of the fixing mechanism 3, the direction in which the second end to the first end of the reinforcement cord 65 is wound around the reinforcement cylinder 61 is clockwise. When the test disc 52 is rotated to a position where the pressure detection head 532 is located at the lower side of the fixing mechanism 3, the direction in which the second end to the first end of the reinforcement cord 65 is wound around the reinforcement cylinder 61 is counterclockwise.
The implementation principle of the safety helmet tension-compression testing machine provided by the embodiment of the application is as follows: both the tension detecting head 531 and the pressure detecting head 532 are mounted on the testing disc 52, and the fixing cap 32 is fixedly mounted on the fixing drum 31 which is rotatably arranged, so that the position of the testing component 53 can be conveniently adjusted by rotating the testing disc 52 and the fixing cap 32 when detection is required. When the connection strength between the cap hoop and the safety helmet is required to be detected, the tension detection head 531 is rotated below the fixed cap seat 32, the fixed cap seat 32 is positioned on the top surface of the fixed barrel 31, and after the safety helmet is installed on the fixed cap seat 32, the cap hoop of the safety helmet can be easily hooked by the tension hook 5312. When the pressure resistance of the safety helmet needs to be detected, the pressure detection head 532 is rotated to the lower side of the fixing cap seat 32, the fixing cap seat 32 is located on the bottom surface of the fixing barrel 31, when the safety helmet is fixedly installed on the fixing cap seat 32, the opening of the safety helmet is vertically upwards, and the pressure column 5322 can be easily abutted to the safety helmet. The time for disassembling and replacing the test component 53 and the fixing cap seat 32 can be greatly saved, and the pulling and pressing performance of a single safety cap can be conveniently and rapidly detected.
And the direction in which the second end to the first end of the reinforcement stay 65 is wound around the reinforcement cylinder 61 is clockwise when the connection strength between the cap band and the helmet is detected. At this time, the whole test disc 52 is driven to move upwards, at this time, the top surface of the upper limit block 671 is attached to the bottom surface of the upper guide block 67, so that the upper limit block 671 moves clockwise, and the whole test disc 52 rotates clockwise, so that the reinforcing pull rope 65 is gradually tensioned, the two reinforcing clamping blocks 63 move towards one side close to the center of the test disc 52, and the test disc 52 can be supported more stably by matching with the upper bottom surface and the lower bottom surface of the clamping groove 631.
And when it is necessary to detect the pressure resistance of the helmet, the direction in which the second end to the first end of the reinforcement cord 65 is wound around the reinforcement cylinder 61 is counterclockwise. The whole test disc 52 is driven to move downwards, at this time, the bottom surface of the lower limiting block 661 is attached to the bottom surface of the lower limiting groove 66, so that the lower limiting block 661 rotates anticlockwise, and the whole test disc 52 rotates anticlockwise, the reinforcing pull rope 65 is gradually tensioned, the two reinforcing clamping blocks 63 move towards one side close to the center of the test disc 52, and the test disc 52 can be supported more stably by matching with the upper bottom surface and the lower bottom surface of the clamping groove 631.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (6)
1. The utility model provides a safety helmet draws pressure testing machine, includes frame (1), installs fixed establishment (3), testing mechanism (5) and elevating system (4) on frame (1), and fixed establishment (3) set up in the upper end department of frame (1), and testing mechanism (5) set up the downside at fixed establishment (3), elevating system (4) drive testing mechanism (5) reciprocate, its characterized in that: the fixing mechanism (3) comprises a fixing cylinder (31), a fixing cap seat (32) and a fixing assembly (33), wherein the fixing cylinder (31) is horizontally and rotatably arranged on the frame (1), the fixing cap seat (32) is fixedly arranged on the outer side wall of the fixing cylinder (31), and the fixing assembly (33) is arranged on the fixing cylinder (31) and can enable the fixing cylinder (31) to be fixed relative to the frame (1); the testing mechanism (5) comprises a testing table (51), a testing disc (52) and a testing component (53), wherein the testing table (51) is installed on the rack (1) in a vertically sliding mode, the testing disc (52) is installed on the top surface of the testing table (51) in a rotating mode, the testing component (53) is divided into a tension detecting head (531) and a pressure detecting head (532), the tension detecting head (531) and the pressure detecting head (532) are installed at the edge of the testing disc (52), the tension detecting head (531) comprises a tension sensor (5311) and a tension hook (5312), the tension sensor (5311) is fixedly installed on the testing disc (52), the tension hook (5312) is fixedly installed at the upper end of the tension sensor (5311), the pressure detecting head (532) comprises a pressure sensor (5321) and a pressure column (5322), the pressure sensor (5321) is fixedly installed on the testing disc (52), and the pressure column (5322) is vertically and fixedly installed on the top surface of the pressure sensor (5321); the test mechanism (5) further comprises a reinforcing assembly (6), the reinforcing assembly (6) comprises a reinforcing clamping block (63), a reinforcing cylinder (61) and a reinforcing pull rope (65), the reinforcing clamping block (63) is horizontally arranged on the top surface of the test table (51) in a sliding mode, the reinforcing clamping block (63) is provided with two blocks and is oppositely arranged on two sides of the test disc (52), the sliding direction of the reinforcing clamping block (63) faces the center of the test disc (52), a long clamping groove (631) is formed in the side surface of the reinforcing clamping block (63) close to the test disc (52), the clamping groove (631) is horizontally arranged, the left end and the right end of the clamping groove (631) are overlapped with the side surface of the reinforcing clamping block (63), when the reinforcing clamping block (63) moves to the position adjacent to the test disc (52), the edge of the test disc (52) is embedded in the clamping groove (631), the reinforcing cylinder (61) is fixedly arranged on the bottom surface of the test disc (52), the axis of the reinforcing cylinder (61) is collinear with the axis of the test disc (52), the reinforcing cylinder (65) is arranged on the first end of the reinforcing cylinder (61) in a winding mode, the reinforcing cylinder (65) can be connected with the reinforcing cylinder (65) at the reinforcing end of the reinforcing cylinder (65) in a winding mode, and the reinforcing cylinder (65 at the other end can be connected with the reinforcing cylinder (65), the reinforcing clamping block (63) is pulled to be adjacent to the test disc (52), the top surface of the test table (51) is provided with a mounting groove (511), the bottom surface of the mounting groove (511) is provided with a reinforcing groove (512), the diameter of the reinforcing groove (512) is smaller than that of the mounting groove (511), and the lower end of the reinforcing cylinder (61) is arranged in the reinforcing groove (512) in a penetrating mode; a lower limit groove (66) is formed in the bottom surface of the reinforcing groove (512), a lower limit block (661) is fixedly arranged on the bottom surface of the lower end of the reinforcing cylinder (61), the cross sections of the lower limit groove (66) and the lower limit block (661) are fan-shaped, the length of the lower limit block (661) is smaller than that of the lower limit groove (66), the bottom surface of the lower limit block (661) and the bottom surface of the lower limit groove (66) are inclined surfaces and can be tightly attached, and the inclined surfaces are gradually raised along the clockwise or anticlockwise direction; an upper limit block (671) is fixedly arranged on the outer side wall of the reinforcement cylinder (61), the upper limit block (671) is located in the installation groove (511), an upper guide block (67) is fixedly arranged on the inner side wall of the installation groove (511), the cross sections of the upper limit block (671) and the upper guide block (67) are fan-shaped, the length of the upper limit block (671) is smaller than that of the upper guide block (67), the top surface of the upper limit block (671) and the bottom surface of the upper guide block (67) are inclined surfaces and can be tightly attached, the direction of gradually increasing the inclined surface height of the upper limit block (671) is the same as the direction of gradually increasing the inclined surface height of the lower limit groove (66), when the test disc (52) rotates to the position of the pressure detection head (532) located at the lower side of the fixing mechanism (3), the direction of gradually increasing the second end in the reinforcement pull rope (65) is opposite to the direction of gradually increasing the inclined surface height of the lower limit groove (66), and the direction of gradually increasing the second end in the reinforcement pull rope (65) when the test disc (52) rotates to the position of the tension detection head (531) located at the lower side of the fixing mechanism (3).
2. The helmet tension-compression testing machine according to claim 1, wherein: the fixing assembly (33) comprises a fixing ring (331) and a fixing pin (332), wherein the fixing ring (331) is fixedly arranged on the frame (1) and the outer side face of the fixing barrel (31), the two fixing rings (331) are parallel to each other and are collinear in axis, the fixing ring (331) is provided with a fixing pin hole (333), and the fixing pin (332) can penetrate through the fixing pin holes (333) on the two fixing rings (331) simultaneously.
3. The helmet tension-compression testing machine according to claim 1, wherein: the top surface of the test bench (51) is provided with a reinforcing chute (62), and a reinforcing clamping block (63) is embedded in the reinforcing chute (62) and moves along the reinforcing chute (62); the opening width of consolidate spout (62) is greater than the width of the widest part department in consolidate spout (62) cross section, fixedly mounted has on the inside wall of consolidate spout (62) consolidates rack (64), be provided with the side and consolidate grip block (63) laminating of tooth in consolidate rack (64), and consolidate the tooth in rack (64) and incline towards one side that is close to test disc (52), consolidate and offered on grip block (63) and consolidate adjacent side of rack (64) consolidate lockhole (641), consolidate install in lockhole (641) consolidate tongue (643) and promote consolidate elastic component (642) that consolidate tongue (643) stretches out, consolidate when tongue (643) and centre gripping rack laminating, consolidate grip block (63) only can be along one side towards test disc (52).
4. A helmet tension and compression tester according to claim 3, wherein: the side surface of the inner side wall of the clamping groove (631) positioned at the upper side is an upper bottom surface, the side surface of the inner side wall positioned at the lower side is a lower bottom surface, the height of one side of the upper bottom surface, which is close to the test disc (52), is higher than the height of one side, which is far away from the test disc (52), of the upper bottom surface, and the height of one side of the lower bottom surface, which is close to the test disc (52), is lower than the height of one side, which is far away from the test disc (52).
5. The helmet tension-compression testing machine according to claim 1, wherein: the telescopic mechanism (2) is mounted on the frame (1), the telescopic mechanism (2) comprises a telescopic frame (22), a telescopic rod (23) and telescopic anchoring nails (24), the telescopic frame (22) is horizontally and slidably mounted on the frame (1), the telescopic rod (23) is horizontally and fixedly mounted on the telescopic frame (22), the axis of the telescopic rod (23) is parallel to the moving direction of the telescopic frame (22), the telescopic anchoring nails (24) are mounted on the telescopic frame (22) and are abutted to the frame (1), the telescopic frame (22) is kept fixed relative to the frame (1), and a fixed cylinder (31) is horizontally and rotatably mounted on the telescopic rod (23).
6. The helmet tension-compression testing machine according to claim 1, wherein: the lifting mechanism (4) comprises a lifting base (42), a lifting screw rod (43) and a lifting motor (44), wherein the lifting base (42) is slidably installed on the frame (1) along the vertical direction, a lifting threaded hole which is vertically arranged is formed in the lifting base (42), the lifting screw rod (43) is vertically and rotatably installed on the frame (1), the lifting screw rod (43) is arranged in the lifting threaded hole in a penetrating mode, and the lifting motor (44) drives the lifting screw rod (43) to rotate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110690226.9A CN113532819B (en) | 2021-06-22 | 2021-06-22 | Safety helmet tension-compression testing machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110690226.9A CN113532819B (en) | 2021-06-22 | 2021-06-22 | Safety helmet tension-compression testing machine |
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| CN113532819A CN113532819A (en) | 2021-10-22 |
| CN113532819B true CN113532819B (en) | 2024-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110690226.9A Active CN113532819B (en) | 2021-06-22 | 2021-06-22 | Safety helmet tension-compression testing machine |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114608747B (en) * | 2022-05-11 | 2022-07-22 | 滨州市检验检测中心(滨州市纺织纤维检验所、滨州市厨具产品质量检验中心) | Stainless steel kitchen equipment horizontal test equipment |
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