CN116840071A - Automatic detection equipment for static four-point bending of bone fracture plate - Google Patents
Automatic detection equipment for static four-point bending of bone fracture plate Download PDFInfo
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- CN116840071A CN116840071A CN202310971188.3A CN202310971188A CN116840071A CN 116840071 A CN116840071 A CN 116840071A CN 202310971188 A CN202310971188 A CN 202310971188A CN 116840071 A CN116840071 A CN 116840071A
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- 208000010392 Bone Fractures Diseases 0.000 title claims abstract description 42
- 238000001514 detection method Methods 0.000 title claims abstract description 31
- 238000013001 point bending Methods 0.000 title claims abstract description 22
- 230000003068 static effect Effects 0.000 title claims abstract description 22
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 29
- 238000007599 discharging Methods 0.000 claims abstract description 28
- 239000000758 substrate Substances 0.000 claims abstract description 17
- 238000000926 separation method Methods 0.000 claims abstract description 4
- 230000007246 mechanism Effects 0.000 claims description 37
- 239000003638 chemical reducing agent Substances 0.000 claims description 20
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 8
- 210000000078 claw Anatomy 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000002457 bidirectional effect Effects 0.000 claims description 2
- 230000035939 shock Effects 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 13
- 238000000338 in vitro Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides automatic detection equipment for static four-point bending of a bone plate, which belongs to the technical field of in-vitro test equipment of three types of medical instruments, and comprises the following components: the device comprises a bottom cabinet, an upper rack, a discharging structure, a carrying structure, a loading structure, a lower tool and an upper tool; a substrate is arranged at the top of the bottom cabinet; the upper frame is arranged above the bottom cabinet and plays a role in protection and separation; the discharging structure is arranged on the base plate and used for placing the bone fracture plate to be detected; the conveying structure is arranged on the base plate and is used for conveying the bone fracture plate on the discharging structure to the lower tool; the loading structure is arranged on the base plate and can drive the upper tool to move towards the lower tool to apply load to the bone fracture plate. The device provided by the invention can automatically carry out four-point bending detection on the bone fracture plate, saves trouble and labor, meets the requirement of testing a large number of samples, and has the advantages of high detection precision and small deviation, and the automatic movement of the roll shaft of the device can accurately control the position.
Description
Technical Field
The invention relates to the technical field of in-vitro test equipment of three types of medical instruments, in particular to static four-point bending automatic detection equipment of a bone fracture plate.
Background
The static mechanical property in-vitro test of the trauma bone fracture plate is mainly based on the standard YY/T0342 determination of bending strength and rigidity of surgical implant bone fracture plate, four-point bending static test is carried out by the device through four roll shafts, the two roll shafts on the inner side load the bone fracture plate to be tested, and the two roll shafts on the outer side support. The static performance indexes of the bending strength and the equivalent bending rigidity of the bone fracture plate can be calculated according to the parameters, wherein the applied load, the corresponding displacement curve, the distance between the two inner side roller shafts and the distance between the inner side roller shafts are recorded during the test.
At present, static four-point bending test equipment of the bone fracture plate is mainly manually operated, operators adjust corresponding upper tools and lower tools according to the hole pitch of the bone fracture plate, so that the distance between an inner side roller shaft and an inner side roller shaft is the required distance, then the bone fracture plate is manually placed on the tools, displacement and load are cleared, a start button is pressed to load, and the equipment records displacement and load curves.
Therefore, there are some problems in the test process due to the judgment of the operator: 1. the distance between the roll shafts cannot be measured accurately, and because an operator can not measure the distance between the roll shaft centers directly through a caliper, great measurement deviation exists; 2. the upper tool and the lower tool are not horizontal due to the problem of frequent disassembly and assembly of the upper tool and the lower tool, and micro-motion in the vertical direction exists; 3. the upper tool and the lower tool cannot be completely centered due to manual adjustment of the roll shafts, namely, the two roll shafts on the inner side deviate to one side of the roll shaft on the outer side; 4. the manual bone fracture plate placement is easy to deviate and rotate in the horizontal direction, and the width direction of the bone fracture plate cannot be completely vertical to the roll shaft; 5. when the load is too large, the roll shaft is easy to displace because the operator does not lock the tool completely. In addition, because the number of the bone fracture plates is very large, hundreds of bone fracture plates are available, each bone fracture plate is tested in a large sample, tens of bone fracture plates in the same model are required to be tested, and the operation is tedious and time-consuming.
In summary, there are many problems in the static four-point bending mechanical performance test of the bone plate at present, these problems all affect the test result, and the test is very dependent on the experimental literacy, experience and endurance of the operator, so the automatic static four-point bending detection device of the bone plate is provided to solve these problems.
Disclosure of Invention
The invention aims to provide automatic detection equipment for static four-point bending of a bone fracture plate.
In order to solve the technical problems, the aim of the invention is realized as follows:
an automated detection device for static four-point bending of a bone plate, comprising: the device comprises a bottom cabinet, an upper rack, a discharging structure, a carrying structure, a loading structure, a lower tool and an upper tool; a substrate is arranged at the top of the bottom cabinet; the upper frame is arranged above the bottom cabinet and plays a role in protection and separation; the discharging structure is arranged on the base plate and used for placing the bone fracture plate to be detected; the conveying structure is arranged on the base plate and is used for conveying the bone fracture plate on the discharging structure to the lower tool; the loading structure is arranged on the base plate and can drive the upper tool to move towards the lower tool to apply load to the bone fracture plate;
the discharging structure comprises a sponge vacuum sucker and a photoelectric sensor; the sponge vacuum sucker is used for sucking the bone fracture plate; the photoelectric sensor is used for detecting whether the bone fracture plate is placed on the sponge vacuum chuck;
the carrying structure comprises a SCARA robot, a feeding paw, a discharging paw and a vision system; the SCARA robot is mounted on the substrate; the feeding paw, the discharging paw and the vision system are all arranged at the execution part of the SCARA robot; the feeding paw is used for carrying the bone fracture plate from the sponge vacuum chuck to the lower tool; the blanking paw is used for carrying the bone fracture plate from the lower tool to the sponge vacuum chuck; the vision system is used for assisting in carrying so as to ensure that the carrying position is correct;
the loading structure comprises a portal frame and a moving mechanism; the portal frame is fixed on the substrate; the upper tool is arranged on the portal frame through the moving mechanism and can move up and down;
the lower tool comprises two roll shafts; the roll shaft is movably arranged on the substrate through a roll shaft moving mechanism;
the upper tool comprises an upper tool mounting plate, a weighing sensor and an upper tool roll shaft assembly; the upper tool mounting plate is connected with the moving mechanism of the loading structure; the upper tooling roll shaft assembly is connected with the upper tooling mounting plate through the weighing sensor and is identical to the lower tooling in structure.
On the basis of the scheme and as a preferable scheme of the scheme, the bottom cabinet comprises a bottom cabinet frame, a bottom cabinet door and casters; the top of the bottom cabinet frame is provided with the base plate, the side face of the bottom cabinet frame is provided with the bottom cabinet door, and the bottom of the bottom cabinet frame is provided with the trundles.
On the basis of the scheme, and as a preferable scheme of the scheme, the upper rack comprises a rack frame body and a rack door; the frame body is arranged on the bottom cabinet; the frame door is arranged on the side face of the frame body.
On the basis of the scheme and as a preferable scheme of the scheme, the feeding paw comprises a plurality of vacuum chucks in a linear array, and the vacuum chucks are provided with spring buffer structures for absorbing load impact during grabbing; the discharging paw is a clamping jaw cylinder; the vision system comprises a camera and a light source, and can shoot the position and the posture of the bone fracture plate in real time.
On the basis of the above scheme and as a preferable scheme of the above scheme, the moving mechanism comprises a ball screw, a linear guide shaft, a coupler, a right angle speed reducer, a double-shaft speed reducer, a speed reducing motor, a transmission shaft and a laser ranging sensor; the two ball screws are vertically arranged on the base plate, and one end of each ball screw is connected with a right-angle speed reducer arranged below the base plate through the coupler; the linear guide shafts are vertically arranged on the substrate; the upper tool mounting plate is connected with the ball screw and the linear guide shaft to realize lifting movement; the double-shaft speed reducer is arranged below the base plate, is connected with the two right-angle speed reducers through the transmission shaft in a bidirectional manner, and is connected with the speed reducing motor through a coupler; the laser ranging sensor is arranged at the top of the portal frame and used for measuring the displacement of the upper tool.
On the basis of the scheme, and as a preferable scheme of the scheme, the roll shaft moving mechanism comprises a heavy-load linear guide rail, a roll shaft mounting block, a floating joint and a linear push-out motor; the roll shaft is arranged on the roll shaft installation block; the roll shaft mounting block is arranged on the heavy-duty linear guide rail in a sliding mode, and one end of the roll shaft mounting block is connected with the linear push-out motor through the floating joint.
On the basis of the scheme, and as a preferable scheme of the scheme, the roll shaft moving mechanism further comprises a drag chain and a micro photoelectric sensor; the drag chain is arranged on one side of the heavy-duty linear guide rail, and one end of the drag chain is connected with the roll shaft mounting block; the miniature photoelectric sensor is arranged between the two roll shaft installation blocks and used for preventing the two roll shaft installation blocks from being too close to each other.
On the basis of the above scheme and as a preferable scheme of the above scheme, the roll shaft moving mechanism further comprises a locking cylinder and a locking mechanism; the locking mechanism comprises a plurality of connecting rods, hinge pins and locking rods; the locking rod is L-shaped, threads are arranged on the surface of the horizontal section and are matched with screw holes formed in the roll shaft mounting block, and the end part of the locking rod is a ball head and can be abutted against the heavy-load linear guide rail; the end part of the vertical section is hinged with one end of the connecting rod through the hinge pin, and the connecting rod can slide relative to the hinge pin; the connecting rod is connected with the locking cylinder push rod, and the locking cylinder is arranged on the roll shaft installation block.
On the basis of the above scheme and as a preferable scheme of the above scheme, the roller shaft moving mechanism further comprises a grating ruler assembly, wherein the grating ruler assembly is used for accurately positioning the roller shaft and comprises a grating origin positioning block, a grating ruler and a detection unit; the grating ruler is fixed on the substrate; the grating origin positioning blocks are arranged at two ends of the grating ruler; the detection unit is fixed on the roller shaft installation block and can slide along the grating ruler.
The beneficial effects of the invention are as follows:
1. the device provided by the invention can automatically perform four-point bending detection on the bone fracture plate, saves trouble and labor, and meets the requirement of testing a large number of samples.
2. The distance between the two roll shafts can be known by controlling the linear push-out motor to accurately control the moving distance of the roll shafts, so that the adjustment and control of the distance between the roll shafts are facilitated, the distance between the two roll shafts can be obtained by driving the roll shafts to move through the linear push-out motor, tooth measurement is not needed, and measurement deviation is avoided. Meanwhile, the distance between the two roll shafts can be accurately obtained by matching with the grating ruler.
3. The upper and lower tools are driven by the roll shaft moving mechanism to move for controlling the distance, repeated disassembly and assembly are not needed, and the problems that the roll shaft is not horizontal and the roll shaft is jogged in the vertical direction due to disassembly and assembly are avoided; meanwhile, the upper tool and the lower tool do not need manual adjustment, and the problem of misalignment of the two roll shafts can be avoided.
4. One side of the roll shaft is provided with a locking mechanism, so that the problem that the accuracy of detection is influenced by the displacement of the roll shaft due to overlarge load can be avoided.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention.
Fig. 2 is a schematic view of the hidden bottom cabinet and the upper frame structure of the present invention.
Fig. 3 is a schematic view of another view angle structure of the hidden bottom cabinet and the upper frame of the present invention.
Fig. 4 is a schematic diagram of the discharging structure of the present invention.
Fig. 5 is a schematic diagram of a carrying structure according to the present invention.
FIG. 6 is a diagram of a loading structure according to the present invention
FIG. 7 is a schematic diagram of a portion of a loading structure according to the present invention.
Fig. 8 is a schematic diagram of the lower tooling structure of the present invention.
Fig. 9 is a schematic structural diagram of an upper tool of the present invention.
Fig. 10 is a schematic view of a locking cylinder and locking mechanism of the present invention.
In the figure: 1. a bottom cabinet; 11. a substrate; 12. a bottom cabinet frame; 13. a bottom cabinet door; 14. casters; 2. an upper frame; 21. a frame body of the frame; 22. a frame door; 3. a discharging structure; 31. a sponge vacuum chuck; 32. a photoelectric sensor; 4. a carrying structure; 41. SCARA robot; 42. feeding claws; 421. a vacuum chuck; 43. discharging claws; 44. a vision system; 5. loading a structure; 51. a portal frame; 52. a ball screw; 53. a linear guide shaft; 54. a coupling; 55. a right angle speed reducer; 56. a double-shaft speed reducer; 57. a speed reducing motor; 58. a transmission shaft; 59. a laser ranging sensor; 6. a lower tool; 61. a roll shaft; 62. heavy-duty linear guide rails; 63. a roll shaft mounting block; 64. a floating structure; 65. a linear push-out motor; 66. a drag chain; 67. a micro photoelectric sensor; 68. locking the air cylinder; 681. a connecting rod; 682. a hinge pin; 683. a locking lever; 69. a grating ruler assembly; 691. a grating origin positioning block; 692. a grating ruler; 693. a detection unit; 7. loading a tool; 71. an upper tool mounting plate; 72. a weighing sensor; 73. and (5) mounting the tooling roll shaft assembly.
Detailed Description
The invention will be further described with reference to the drawings and specific examples.
As shown in fig. 1 to 3, an automated detection device for static four-point bending of a bone plate, comprising: the automatic feeding device comprises a bottom cabinet 1, an upper frame 2, a discharging structure 3, a carrying structure 4, a loading structure 5, a lower tool 6 and an upper tool 7.
The base cabinet 1 has a barrier protection function, and a base plate 11 is arranged at the top. The upper frame 2 is arranged above the bottom cabinet 1 and plays a role in protection and separation. The discharging structure 3 is arranged on the base plate 11 and is used for placing the bone fracture plate to be detected and the bone fracture plate after detection. The carrying structure 4 is arranged on the base plate 11 and is used for carrying the bone fracture plate between the discharging structure 3 and the lower tool 6. The loading structure 5 is arranged on the base plate 11 and can drive the upper tool 7 to move downwards to the tool 6 to apply load to the bone fracture plate. The upper and lower workers each include two rollers to apply load to the bone plate.
The base cabinet 1 comprises a base cabinet frame 12, a base cabinet door 13 and casters 14. The base plate 11 is arranged at the top of the bottom cabinet frame 12, the bottom cabinet door 13 is arranged on the side face of the base cabinet frame, the casters 14 are arranged at the bottom of the base cabinet frame, and the casters 14 facilitate the whole mobile equipment. The base cabinet frame 12 cooperates with the base cabinet door 13 to form a closed space for isolating and protecting the circuits and structures therein. 2. The cabinet door 13 is mounted in the door frame of the cabinet frame 12, which facilitates inspection with the internal control circuits and equipment. Further, the base cabinet 1 further comprises a cooling fan, a master switch, a pneumatic triple piece, a power socket and a USB socket. The radiator fan mainly dissipates heat to electrical equipment of the base cabinet 1, the master switch is used for controlling a power switch, the pneumatic triple piece is used for preprocessing an air source, the power socket is connected with an external power supply for supplying power, the USB socket is connected with an internal industrial personal computer, and USB flash disk backup test data can be inserted.
The upper chassis 2 includes a chassis frame 21 and a chassis door 22. The frame body 21 is arranged on the bottom cabinet 1; the frame door 22 is arranged on the side surface of the frame body 21, and door-inhale sensors are arranged on the frame door 22 and the frame body 21 and used for detecting whether the frame door 22 is closed or not, so that the operation safety is ensured. The top of the frame body 21 is provided with a three-color alarm lamp for alarming and prompting equipment, and the frame body 21 is also provided with a touch screen, an emergency stop button, an operation button box and a safety grating; the touch screen is used for operating and displaying real-time data; the emergency stop button is used for emergency stop in emergency; the operation button box can control operations such as starting, suspending, lifting and the like; the safety grating is used for avoiding personnel and articles entering an operation space when the equipment runs, and affecting safety.
As shown in fig. 4, the discharging structure 3 includes a sponge vacuum chuck 31 and a photoelectric sensor 32. The sponge vacuum chuck 31 is used to hold the bone plate. The photoelectric sensor 32 is used to detect whether the bone plate is placed on the sponge vacuum chuck 31. The operator places the bone plate on the sponge vacuum chuck 31, detects whether the bone plate is placed on the chuck through two correlation photoelectric sensors 32 of crisscross arrangement, adsorbs the bone plate through the sponge chuck and is fixed in on the chuck.
As shown in fig. 5, the handling structure 4 comprises a SCARA robot 41, a loading gripper 42, a unloading gripper 43 and a vision system 44. The SCARA robot 41 is mounted on the substrate 11, and the feeding gripper 42, the discharging gripper 43 and the vision system 44 are mounted on the execution part of the SCARA robot 41. Wherein, the material loading hand claw 42 is used for carrying the bone plate from sponge vacuum chuck 31 to lower frock 6, and unloading hand claw 43 is used for carrying the bone plate from lower frock 6 to sponge vacuum chuck 31, and vision system 44 is used for assisting the transport in order to ensure that the transport position is correct. Preferably, the loading jaw 42 includes a linear array of several vacuum cups 421 for sucking up the bone plate, and the vacuum cups 421 are provided with spring-cushioning structures to absorb load shock during grabbing. Each vacuum chuck 421 corresponds to a vacuum generator for generating a vacuum suction force. The discharging claw 43 is a claw cylinder, judges the position of the inner side roller shaft middle bone fracture plate through the displacement of the roller shaft when the test is completed, grabs through the claw and is placed on the sponge vacuum chuck 31 again. The vision system 44 includes a camera and an annular light source for photographing the position and posture of the bone plate on the sponge vacuum chuck 31 to adjust the posture of the feeding paw 42 and automatically judge the position of the discharge, so that the discharge can be accurately placed on the outer side roller shaft of the lower tool 6.
As shown in fig. 6 and 7, the loading structure 5 includes a gantry 51 and a moving mechanism. The gantry 51 is fixed to the substrate 11. The upper tool 7 is installed on the portal frame 51 through a moving mechanism and can move up and down. Specifically, the moving mechanism includes a ball screw 52, a linear guide shaft 53, a coupling 54, a right angle speed reducer 55, a double-shaft speed reducer 56, a speed reduction motor 57, a transmission shaft 58, and a laser ranging sensor 59. The two ball screws 52 are vertically arranged on the base plate 11, are connected to the inner sides of the two side columns of the portal frame 51 through connecting frames, and the lower ends of the ball screws are connected with a right-angle speed reducer 55 arranged below the base plate 11 through a coupler 54. The linear guide shafts 53 are vertically provided on the substrate 11, fixed to the inner sides of the two side columns of the gantry 51 by a link, and disposed beside the ball screw 52. The upper tool mounting plate 71 of the upper tool 7 is connected with the ball screw 52 and the linear guide shaft 53 to realize lifting movement. The double-shaft speed reducer 56 is arranged below the base plate 11, and two sides of the double-shaft speed reducer 56 are connected with the two right-angle speed reducers 55 through transmission shafts 58 and are connected with the speed reducing motor 57 through the shaft couplings 54. The laser ranging sensor 59 is disposed at the top center of the gantry 51 and is used for measuring the displacement of the upper tool 7, so that an internal program draws a load displacement curve.
The coupler 54, the right angle reducer 55, the double-shaft reducer 56, the gear motor 57 and the transmission shaft 58 are all arranged below the base plate 11 and are hidden in the bottom cabinet 1. The gear motor 57 drives the ball screw 52 to rotate, and the ball screw 52 drives the upper tool mounting plate 71 to lift.
As shown in fig. 8, the lower tool 6 includes two rollers 61, and the two rollers 61 are movably disposed on the substrate 11 by a roller moving mechanism so as to adjust the distance between the two rollers 61.
Wherein the roller shaft moving mechanism comprises a heavy-duty linear guide rail 62, a roller shaft mounting block 63, a floating joint 64 and a linear push-out motor 65. The roll shaft 61 is mounted on a roll shaft mounting block 63, the roll shaft mounting block 63 is slidably arranged on a heavy-duty linear guide rail 62, one end of the roll shaft mounting block is connected with a linear push-out motor 65 through a floating joint 64, and tiny assembly interference between a motor push rod and the guide rail is absorbed through the floating joint 64. The heavy load linear guide 62 is fixed to the base plate 11. The two linear pushing motors 65 control the movement of the two roller shafts 61, respectively, and the movement distances can be adjusted, respectively.
Further, the roller shaft moving mechanism further includes a drag chain 66 and a micro photoelectric sensor 67. The drag chain 66 is disposed on one side of the heavy-duty linear guide 62, and one end is connected to the roller shaft mounting block 63, thereby improving the stability of movement. The micro photoelectric sensor 67 is disposed between the two roller shaft mounting blocks 63, and is used for preventing the two roller shaft mounting blocks 63 from being collided too close.
Still further, as shown in fig. 10, the roller shaft moving mechanism further includes a lock cylinder 68 and a lock mechanism. When the roller shaft mounting block 63 reaches the position, the locking mechanism including a plurality of links 681, hinge pins 682 and locking bars 683 is pushed by the locking cylinder 68 to lock the roller shaft mounting block 63 against movement. The locking rod 683 is L-shaped, the surface of the L-shaped horizontal section is provided with threads which are matched with screw holes formed on the roll shaft mounting block 63, and the end part of the locking rod is a ball head and can be abutted on the heavy-duty linear guide rail 62; the end of the L-shaped vertical section is hinged with one end of the connecting rod 681 through the hinge pin 682, and the connecting rod 681 can slide relative to the hinge pin 682, and the locking rod 683 cannot interfere after being screwed into the feeding displacement. The link 681 is connected to the push rod of the lock cylinder 68, and the lock cylinder 68 is provided on the roller shaft mounting block 63. In this embodiment, two links 681 are hinged to each other.
Preferably, to accurately measure the distance traveled by the roller 61, the roller movement mechanism further includes a grating scale assembly 69. The grating scale assembly 69 is used for accurately measuring the position of the roller shaft 61, and comprises a grating origin positioning block 691, a grating scale 692 and a detection unit 693. The grating scale 692 is fixed on the substrate 11; grating origin positioning blocks 691 are provided at both ends of grating scale 692. The detection unit 693 is fixed to the roller shaft mounting block 63, is slidable along the grating scale 692,
as shown in fig. 9, the upper tool 7 includes an upper tool mounting plate 71, a load cell 72, and an upper tool roller assembly 73. The upper fixture mounting plate 71 is connected with a moving mechanism of the loading structure 5, and is driven by the moving mechanism to lift. The upper tooling roll shaft assembly 73 is connected with the upper tooling mounting plate 71 through the weighing sensor 72, and the structure of the upper tooling roll shaft assembly is the same as that of the lower tooling 6. Preferably, the number of the weighing sensors 72 is three to ensure the reliability of the connection of the two, and the load in the quasi-static state is obtained by the accumulated result of the three weighing sensors 72.
The working process comprises the following steps: firstly, placing the bone plate on the discharging structure 3, then carrying the bone plate on a roller shaft 61 of a lower tool 6 by a carrying structure 4, then driving an upper tool 7 to descend under the drive of a loading structure 5 to contact with the bone plate and apply load for detection, and carrying the bone plate back to the discharging structure 3 by the carrying structure 4 after the detection is completed.
The foregoing describes in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the invention by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.
Claims (9)
1. An automated detection device for static four-point bending of a bone plate, comprising: the device comprises a bottom cabinet (1), an upper frame (2), a discharging structure (3), a carrying structure (4), a loading structure (5), a lower tool (6) and an upper tool (7); a base plate (11) is arranged at the top of the bottom cabinet (1); the upper frame (2) is arranged above the bottom cabinet (1) and plays a role in protection and separation; the discharging structure (3) is arranged on the base plate (11) and is used for placing a bone fracture plate to be detected; the conveying structure (4) is arranged on the base plate (11) and is used for conveying the bone fracture plate on the discharging structure (3) to the lower tool (6); the loading structure (5) is arranged on the base plate (11) and can drive the upper tool (7) to move towards the lower tool (6) to apply load to the bone fracture plate;
the discharging structure (3) comprises a sponge vacuum sucker (31) and a photoelectric sensor (32); the sponge vacuum sucker (31) is used for sucking the bone fracture plate; the photoelectric sensor (32) is used for detecting whether the bone fracture plate is placed on the sponge vacuum sucker (31);
the carrying structure (4) comprises a SCARA robot (41), a feeding paw (42), a discharging paw (43) and a vision system (44); the SCARA robot (41) is mounted on the substrate (11); the feeding paw (42), the discharging paw (43) and the vision system (44) are all arranged at the execution part of the SCARA robot (41); the feeding paw (42) is used for carrying the bone fracture plate from the sponge vacuum chuck (31) to the lower tool (6); the blanking paw (43) is used for carrying the bone fracture plate from the lower tool (6) to the sponge vacuum chuck (31); the vision system (44) is used for assisting in carrying to ensure that the carrying position is correct;
the loading structure (5) comprises a portal frame (51) and a moving mechanism; the portal frame (51) is fixed on the substrate (11); the upper tool (7) is arranged on the portal frame (51) through the moving mechanism and can move up and down;
the lower tool (6) comprises two roll shafts (61); the roll shaft (61) is movably arranged on the substrate (11) through a roll shaft moving mechanism;
the upper tool (7) comprises an upper tool mounting plate (71), a weighing sensor (72) and an upper tool roll shaft assembly (73); the upper tool mounting plate (71) is connected with the moving mechanism of the loading structure (5); the upper tooling roll shaft assembly (73) is connected with the upper tooling mounting plate (71) through the weighing sensor (72), and is identical to the lower tooling (6) in structure.
2. The automatic detection device for static four-point bending of a bone plate according to claim 1, wherein the bottom cabinet (1) comprises a bottom cabinet frame (12), a bottom cabinet door (13) and casters (14); the top of the bottom cabinet frame (12) is provided with the base plate (11), the side face of the bottom cabinet frame is provided with the bottom cabinet door (13), and the bottom of the bottom cabinet frame is provided with the trundles (14).
3. The automatic detection device for static four-point bending of a bone plate according to claim 1, wherein the upper frame (2) comprises a frame (21) and a frame door (22); the frame body (21) is arranged on the bottom cabinet (1); the frame door (22) is arranged on the side face of the frame body (21).
4. The automated detection device for static four-point bending of bone plates according to claim 1, wherein the feeding claw (42) comprises a plurality of vacuum chucks (421) in a linear array, and the vacuum chucks (421) are provided with spring buffer structures to absorb load shocks during grabbing; the discharging paw (43) is a clamping jaw cylinder; the vision system (44) includes a camera and a light source to capture bone plate position and pose in real time.
5. The automatic detection device for static four-point bending of a bone plate according to claim 1, wherein the moving mechanism comprises a ball screw (52), a linear guide shaft (53), a coupler (54), a right angle speed reducer (55), a double-shaft speed reducer (56), a speed reducing motor (57), a transmission shaft (58) and a laser ranging sensor (59); the two ball screws (52) are vertically arranged on the base plate (11), and one end of each ball screw is connected with a right-angle speed reducer (55) arranged below the base plate (11) through the coupler (54); the number of the linear guide shafts (53) is two, and the linear guide shafts are vertically arranged on the base plate (11); the upper tool mounting plate (71) is connected with the ball screw (52) and the linear guide shaft (53) to realize lifting movement; the double-shaft speed reducer (56) is arranged below the base plate (11), is connected with the two right-angle speed reducers (55) through the transmission shafts (58) in a bidirectional manner, and is connected with the speed reducing motor (57) through the coupling (54); the laser ranging sensor (59) is arranged at the top of the portal frame (51) and is used for measuring the displacement of the upper tool (7).
6. The automated bone plate static four-point bending detection device according to claim 1, wherein the roller movement mechanism comprises a heavy-duty linear guide (62), a roller mounting block (63), a floating joint (64), and a linear push-out motor (65); the roll shaft (61) is mounted on the roll shaft mounting block (63); the roll shaft mounting block (63) is slidably arranged on the heavy-duty linear guide rail (62), and one end of the roll shaft mounting block is connected with the linear push-out motor (65) through the floating joint (64).
7. The automated bone plate static four-point bending detection apparatus of claim 6, wherein the roller movement mechanism further comprises a drag chain (66) and a micro photoelectric sensor (67); the drag chain (66) is arranged on one side of the heavy-duty linear guide rail (62), and one end of the drag chain is connected with the roll shaft mounting block (63); the miniature photoelectric sensor (67) is arranged between the two roll shaft mounting blocks (63) and is used for preventing the two roll shaft mounting blocks (63) from being too close to collide.
8. The automated bone plate static four-point bending detection apparatus of claim 6, wherein the roller movement mechanism further comprises a locking cylinder (68) and a locking mechanism; the locking mechanism comprises a plurality of connecting rods (681), a hinge pin (682) and a locking rod (683); the locking rod (683) is L-shaped, threads are arranged on the surface of the horizontal section and are matched with screw holes formed in the roll shaft mounting block (63), and the end part of the locking rod is a ball head and can be abutted on the heavy-load linear guide rail (62); the vertical section end is hinged with one end of the connecting rod (681) through the hinge pin (682), and the connecting rod (681) can slide relative to the hinge pin (682); the connecting rod (681) is connected with the push rod of the locking cylinder (68), and the locking cylinder (68) is arranged on the roll shaft mounting block (63).
9. The automated bone plate static four-point bending detection apparatus of claim 6, wherein the roller movement mechanism further comprises a grating scale assembly (69), the grating scale assembly (69) for accurate positioning of the roller shaft (61) comprising a grating origin positioning block (691), a grating scale (692), a detection unit (693); -the grating scale (692) is fixed to the substrate (11); the grating origin positioning blocks (691) are arranged at two ends of the grating ruler (692); the detection unit (693) is fixed to the roller shaft mounting block (63) and is slidable along the grating ruler (692).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310971188.3A CN116840071A (en) | 2023-08-02 | 2023-08-02 | Automatic detection equipment for static four-point bending of bone fracture plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310971188.3A CN116840071A (en) | 2023-08-02 | 2023-08-02 | Automatic detection equipment for static four-point bending of bone fracture plate |
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| Publication Number | Publication Date |
|---|---|
| CN116840071A true CN116840071A (en) | 2023-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310971188.3A Pending CN116840071A (en) | 2023-08-02 | 2023-08-02 | Automatic detection equipment for static four-point bending of bone fracture plate |
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| CN (1) | CN116840071A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118168949A (en) * | 2024-05-10 | 2024-06-11 | 正合医疗科技（常州）有限公司 | Bone fracture plate test device |
-
2023
- 2023-08-02 CN CN202310971188.3A patent/CN116840071A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118168949A (en) * | 2024-05-10 | 2024-06-11 | 正合医疗科技（常州）有限公司 | Bone fracture plate test device |
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