Bone screw tension and torsion testing machine

Abstract

The utility model discloses a bone screw tension-torsion testing machine, which comprises a working seat, a stretching detection mechanism, a sleeving and pressing mechanism and a mounting and adjusting mechanism, and is characterized in that the stretching detection mechanism comprises a stretching cylinder, a sliding rail, a connecting block, a sliding block and a detection block assembly; the sleeving and pressing mechanism comprises an adjusting plate, a mounting plate, a sleeve, a bottom ring, a locking ring, a locking groove, a sliding pin and a handle, the mounting and adjusting mechanism comprises a longitudinal plate, a lateral plate, an adjusting hole, an adjusting bolt, a knob and an adjusting nut, a stretching cylinder and a sliding rail ensure the uniformity and stability of tension, and a sliding block and a detection block assembly accurately press the two sides of a bone screw. According to the device, the test accuracy is improved, accurate compression of the bone screws is achieved, the compression stability and reliability are ensured, the device adapts to different test environments and requirements, the stability and safety of the device are ensured through the bottom plate, and shaking or inclination in the test process is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to bone screw detection technical field, more specifically, it relates to a bone screw pull -twist testing machine. BACKGROUND

[0002] The bone screw pull -twist testing machine is a kind of equipment specially used to test the mechanical properties of bone screw, and is mainly used to evaluate the strength and durability of bone screw under the condition of torsion.

[0003] In the prior art, first, part of device bone screw cannot be stably installed on testing machine, cannot carry out effective tension and torsion test, bone screw can be loose or fall off in the test process, lead to test failure, cannot obtain effective test data, bone screw can suddenly loosen or fly out in the test process, cause security risk to operator and equipment, the loosening or falling off of bone screw can damage other components of testing machine, increase repair cost and downtime, second, part of device cannot be detected position adjustment according to need, cannot adapt to different test environment and demand, cannot be accurately adjusted according to the size and shape of bone screw, can lead to inaccurate force point in the test process, influence the precision of test result, increase the complexity and workload of operation. UTILITY MODEL CONTENT

[0004] (I) technical problem solved

[0005] In view of the problems in the prior art, the utility model provides a bone screw pull -twist testing machine to solve the technical problems that bone screw cannot be stably installed on testing machine, cannot be position adjusted according to need mentioned in background art.

[0006] (II) technical scheme

[0007] To achieve the above object, the utility model provides following technical scheme: a kind of bone screw pull-torsion testing machine, including work seat, extension detection mechanism, suit compression mechanism and installation adjusting mechanism, the extension detection mechanism includes extension cylinder, slide rail, connecting block, sliding block and detection block assembly, extension cylinder is installed on the end face of work seat, slide rail is arranged on work seat, sliding block is slidably installed on slide rail, and detection block assembly is installed at both ends of sliding block, connecting block is installed at one side of sliding block, one end of extension cylinder is connected with connecting block, two sides detection block assembly reciprocate and compress the both sides of bone screw, the suit compression mechanism includes adjusting plate, mounting plate, sleeve, bottom ring, lock ring, lock slot, sliding pin and handle, adjusting plate is installed at both ends of work seat, mounting plate is installed at the bottom end of sleeve, bottom ring is installed at one side of sleeve, one end of lock ring is rotatably connected with one end of bottom ring, lock slot is arranged on lock ring, sliding pin is limitingly slidably arranged on the side surface of sleeve, handle is installed at one end of sliding pin, sliding pin can be inserted into lock slot and lock ring is fixed on bottom ring.

[0008] The utility model further sets up, the installation adjusting mechanism includes longitudinal plate, lateral plate, adjusting hole, adjusting peg, knob and adjusting nut, work seat is fixedly installed on longitudinal plate, lateral plate is installed at both sides of mounting plate, adjusting nut is installed at the top end of lateral plate, and a plurality of adjusting holes are throughly arranged on adjusting plate and longitudinal plate, adjusting peg can pass through different adjusting holes and extend through lateral plate and be connected with adjusting nut, knob is installed at one end of adjusting peg.

[0009] The utility model further sets up, the side surface of sleeve is equipped with compression frame, and compression cylinder and guide frame are installed on compression frame, and the stability and reliability of compression cylinder and guide frame are ensured, and the reliability of operation is improved.

[0010] The utility model further sets up, one end of compression cylinder extends through compression frame and is connected with compression plate, one end surface of compression plate is equipped with compression block, and the accurate compression of bone screw is realized by compression plate, and the accuracy and reliability of test are improved.

[0011] The utility model further sets up, the suit compression mechanism is symmetrically installed, and the both ends of bone screw are pressed by the symmetric compression block, the stability and reliability of compression are ensured, and the reliability of operation is improved.

[0012] The utility model further sets up, one end of compression plate is equipped with guide rod, and guide rod is slidably guided in cooperation with guide frame, and the stable sliding of compression plate is ensured, and the reliability of operation is improved.

[0013] The utility model further provides for, install rubber pad on the lock ring and bottom ring, and the inner wall of rubber pad is tightly pressed to the outer surface of bone screw, and rubber pad ensures the stable compression of bone screw, improves the accuracy and reliability of test.

[0014] The utility model further provides for, install bottom plate on the bottom of longitudinal board, bottom plate is contacted with the ground of required position, bottom plate ensures the stability and security of device, improves the reliability of operation.

[0015] (Three) beneficial effect

[0016] Compared with the prior art, the utility model provides a bone screw tension and torsion testing machine, has the following beneficial effects:

[0017] The utility model sets up the extension and draw detection mechanism, and the extension and draw cylinder and slide rail ensure the uniformity and stability of pulling force, and the sliding block and detection block assembly are accurately pressed to both sides of bone screw, improve the accuracy of test, through the setting of detection block assembly, the size and change of pulling force are recorded in real time, provide detailed test data, be convenient for subsequent analysis, the automation control of extension and draw cylinder reduces the complexity and error of manual operation, improves test efficiency and accuracy.

[0018] The utility model sets up the set compression mechanism, and the adjusting plate, mounting plate, sleeve, bottom ring and lock ring ensure the stable fixation of bone screw, prevent loosening or falling off, realize the accurate compression of bone screw, ensure the stability and reliability of compression, and the guide rod and guide frame ensure the stable sliding of compression plate, prevent deviation and jam, improve the reliability of operation, and the rubber pad is tightly pressed to the outer surface of bone screw, ensures the stable compression of bone screw, improves the accuracy and reliability of test.

[0019] The utility model sets up the installation adjusting mechanism, and longitudinal board, lateral board, adjusting hole, adjusting bolt and knob provide flexible position adjustment, adapt to different test environment and demand, and bottom plate ensures the stability and security of device, prevents shaking or inclination during test process, protects the safety of operator and equipment, and the adjusting nut is connected with adjusting bolt, ensures the fixation and stability of adjusting bolt, prevents loosening and falling off. ACCURACY

[0020] Figure 1 It is the overall structure schematic drawing of device in unused state in the utility model;

[0021] Figure 2 It is the structure schematic drawing of device back portion in the utility model;

[0022] Figure 3 It is the structure schematic drawing of extension and draw detection mechanism and set compression mechanism in the utility model;

[0023] Figure 4The structure schematic diagram of the sleeving and pressing mechanism and the installation and adjusting mechanism is shown in the utility model.

[0024] Figure 5 The structure schematic diagram of the sleeving and pressing mechanism and the installation and adjusting mechanism is shown in the utility model.

[0025] In the drawing: 1, work seat; 2, stretch cylinder; 3, slide rail; 4, connecting block; 5, sliding block; 6, detection block assembly; 7, adjusting plate; 8, mounting plate; 9, sleeve; 10, bottom ring; 11, lock ring; 12, lock groove; 13, sliding pin; 14, handle; 15, vertical plate; 16, lateral plate; 17, adjusting hole; 18, adjusting bolt; 19, twist; 20, adjusting nut; 21, pressing frame; 22, pressing cylinder; 23, guide frame; 24, pressing block; 25, guide rod; 26, rubber pad; 27, bottom plate; 401, pressing plate. DETAILED DESCRIPTION

[0026] It should be noted that the embodiments and the features in the embodiments in the present application can be combined with each other without conflict.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as that generally understood by the person skilled in the art to which the present application belongs.

[0028] In the utility model, the orientation such as "up, down" is generally directed to the direction shown in the drawing, or is directed to the vertical, perpendicular or gravity direction, unless otherwise specified; similarly, for the convenience of understanding and description, "left, right" is generally directed to the left and right shown in the drawing; "inner, outer" refers to the inner and outer relative to the contour of each component itself, but the above orientation words are not used to limit the utility model.

[0029] Please refer to Figures 1-5The utility model provides a kind of bone screw pull-torsion testing machine, including work seat 1, stretch detection mechanism, sheathed compression mechanism and installation adjusting mechanism, stretch detection mechanism includes stretch cylinder 2, slide rail 3, connecting block 4, sliding block 5 and detection block assembly 6, stretch cylinder 2 is installed on the end face of work seat 1, slide rail 3 is arranged on work seat 1, sliding block 5 is slidably installed on slide rail 3, and detection block assembly 6 is installed at both ends of sliding block 5, connecting block 4 is installed on the side of sliding block 5, one end of stretch cylinder 2 is connected with connecting block 4, both sides detection block assembly 6 reciprocate and press to the both sides of bone screw, sheathed compression mechanism includes adjusting plate 7, mounting plate 8, sleeve 9, bottom ring 10, lock ring 11, lock slot 12, sliding pin 13 and handle 14, adjusting plate 7 is installed at both ends of work seat 1, mounting plate 8 is installed at the bottom end of sleeve 9, bottom ring 10 is installed on one side of sleeve 9, one end of lock ring 11 is rotatably connected with one end of bottom ring 10, lock slot 12 is arranged on lock ring 11, sliding pin 13 is limitingly and slidably arranged on the side surface of sleeve 9, handle 14 is installed at one end of sliding pin 13, and sliding pin 13 can be extended into lock slot 12 to fix lock ring 11 on bottom ring 10.

[0030] In the embodiment, one end of stretch cylinder 2 is connected with connecting block 4, stretch cylinder 2 starts to work, sliding block 5 is pushed to slide along slide rail 3, sliding block 5 slides on slide rail 3, drives detection block assembly 6 to move to the both sides of bone screw, both sides detection block assembly 6 reciprocate and move to the both sides of bone screw and apply force, detection block assembly 6 transmits force to bone screw, the size and change of force are recorded by detection device, and the mechanical properties of bone screw are analyzed, at this time, bone screw is placed in sleeve 9, lock ring 11 is manually rotated, one end of lock ring 11 is matched with bottom ring 10, lock slot 12 on lock ring 11 is aligned with sliding pin 13, sliding pin 13 is pushed by handle 14, sliding pin 13 is extended into lock slot 12, lock ring 11 is fixed on bottom ring 10, and the stability of sleeve 9 is ensured, and compression cylinder 22 starts to work, compression plate 401 is pushed to move to the both ends of bone screw, compression block 24 on compression plate 401 gradually compresses the both ends of bone screw, and the stability and accuracy of detection process are ensured.

[0031] Installation adjusting mechanism includes longitudinal plate 15, lateral plate 16, adjusting hole 17, adjusting bolt 18, knob 19 and adjusting nut 20, work seat 1 is fixedly installed on longitudinal plate 15, lateral plate 16 is installed on the both sides of mounting plate 8, adjusting nut 20 is installed on the top end of lateral plate 16, a plurality of adjusting holes 17 are throughly arranged on adjusting plate 7 and longitudinal plate 15, adjusting bolt 18 can pass through different adjusting holes 17 and extend through lateral plate 16 and be connected with adjusting nut 20, knob is installed at one end of adjusting bolt 18.

[0032] In this embodiment, the position needs to be adjusted according to the length of the bone screw, the appropriate adjusting hole 17 is selected, the adjusting bolt 18 is inserted through the selected adjusting hole 17 and extends through the lateral plate 16 to be connected with the adjusting nut 20, the adjusting bolt 18 is manually adjusted by the knob, the adjusting bolt 18 is fixed in the adjusting hole 17, the stable position of the working seat 1 is ensured, the bottom plate 27 is in contact with the ground at the required position, and the stability and levelness of the whole device are ensured.

[0033] Please refer to Figures 1-5 , as a supplementary embodiment of the bone screw tension-torsion testing machine, the sleeve 9 is provided with a pressing frame 21 on the side surface, the pressing frame 21 is provided with a pressing cylinder 22 and a guide frame 23, one end of the pressing cylinder 22 extends through the pressing frame 21 and is connected with the pressing plate 401, one end surface of the pressing plate 401 is provided with a pressing block 24, the sleeve pressing mechanism is symmetrically arranged, the symmetric pressing blocks 24 are opposite to the two ends of the bone screw, one end of the pressing plate 401 is provided with a guide rod 25, the guide rod 25 is slidably guided in cooperation with the guide frame 23, the lock ring 11 and the bottom ring 10 are provided with rubber pads 26, the inner wall of the rubber pad 26 is in contact with the outer surface of the bone screw, the bottom of the vertical plate 15 is provided with a bottom plate 27, and the bottom plate 27 is in contact with the ground at the required position.

[0034] More specifically, by installing the adjusting mechanism, selecting the appropriate adjusting hole 17, and fixing the adjusting bolt 18 through the adjusting hole 17, the stable position of the working seat 1 is ensured, the bone screw to be detected is installed in the sleeve 9, the lock ring 11 is fixed on the bottom ring 10 by cooperation of the lock ring 11 and the sliding pin 13, the stability of the sleeve 9 is ensured, the pressing cylinder 22 is started, the two ends of the bone screw are pressed by the pressing plate 401 and the pressing block 24, the fixation of the material is ensured, the extension and stretching cylinder 2 is started, the sliding block 5 is pushed to slide along the sliding rail 3, the detection block assembly 6 gradually presses the two sides of the bone screw, the tension or pressure is applied, the change of the tension or pressure is recorded by the detection device, and the mechanical properties of the bone screw are analyzed.

[0035] In summary, when the extension and stretching mechanism needs to be operated, one end of the extension and stretching cylinder 2 is connected with the connecting block 4, the extension and stretching cylinder 2 starts to work, the sliding block 5 is pushed to slide along the sliding rail 3, the sliding block 5 slides on the sliding rail 3, the detection block assembly 6 is driven to move to the two sides of the bone screw, the two detection block assemblies 6 on the two sides reciprocate to the two sides of the bone screw and apply force, the detection block assembly 6 transmits the force to the bone screw, the size and change of the force are recorded by the detection device, and the mechanical properties of the bone screw are analyzed.

[0036] When the operation of the compression mechanism is needed, the bone screw is placed in the sleeve 9, the lock ring 11 is manually rotated, one end of the lock ring 11 is matched with the bottom ring 10, the lock slot 12 on the lock ring 11 is aligned with the sliding pin 13, the sliding pin 13 is pushed by the handle 14 and extended into the lock slot 12, the lock ring 11 is fixed on the bottom ring 10, the stability of the sleeve 9 is ensured, the compression cylinder 22 starts to work, the compression plate 401 is pushed to move towards the two ends of the bone screw, the compression blocks 24 on the compression plate 401 gradually compress the two ends of the bone screw, and the stability and accuracy of the detection process are ensured.

[0037] When the operation of the adjusting mechanism is needed, the position needs to be adjusted according to the length of the bone screw, the appropriate adjusting hole 17 is selected, the adjusting bolt 18 is inserted through the adjusting hole 17 and extended through the lateral plate 16 to be matched with the adjusting nut 20, the adjusting bolt 18 is manually adjusted by the knob, the adjusting bolt 18 is fixed in the adjusting hole 17, the stable position of the working seat 1 is ensured, the bottom plate 27 is in contact with the ground at the required position, and the stability and horizontality of the whole device are ensured.

[0038] By installing the adjusting mechanism, the appropriate adjusting hole 17 is selected, the adjusting bolt 18 is inserted through the adjusting hole 17 and fixed, the stable position of the working seat 1 is ensured, the bone screw to be detected is installed in the sleeve 9, the lock ring 11 is fixed on the bottom ring 10 by the cooperation of the lock ring 11 and the sliding pin 13, the stability of the sleeve 9 is ensured, the compression cylinder 22 is started, the two ends of the bone screw are compressed by the compression plate 401 and the compression blocks 24, the fixation of the material is ensured, the extension cylinder 2 is started, the sliding block 5 is pushed to slide along the slide rail 3, the detection block assembly 6 gradually presses the two sides of the bone screw, the tension or pressure is applied, the change of the tension or pressure is recorded by the detection device, and the mechanical properties of the bone screw are analyzed.

[0039] In all the schemes mentioned above, the connection between the two components can be selected according to the actual situation, such as welding, bolt and nut cooperation connection, bolt or screw connection or other known connection mode, which will not be repeated here. In the above, when the fixed connection is mentioned, welding is preferred, although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A bone screw pull-out and torsion testing machine comprising a working seat (1), a stretching and pulling detection mechanism, a sleeving and pressing mechanism and a mounting and adjusting mechanism, characterized in that: The stretching detection mechanism comprises a stretching cylinder (2), a slide rail (3), a connecting block (4), a sliding block (5) and a detection block assembly (6), the stretching cylinder (2) is installed on the end face of the working seat (1), the slide rail (3) is arranged on the working seat (1), the sliding block (5) is slidingly installed on the slide rail (3), and the detection block assembly (6) is installed at two ends of the sliding block (5); the connecting block (4) is installed on one side of the sliding block (5), one end of the stretching cylinder (2) is connected with the connecting block (4), the sleeve pressing mechanism comprises an adjusting plate (7), a mounting plate (8), a sleeve (9), a bottom ring (10), a locking ring (11), a locking groove (12), a sliding pin (13) and a handle (14), the adjusting plate (7) is installed at two ends of the working seat (1), the mounting plate (8) is installed at the bottom end of the sleeve (9), the bottom ring (10) is installed on one side of the sleeve (9), one end of the locking ring (11) is rotatably connected with one end of the bottom ring (10), the locking groove (12) is arranged on the locking ring (11), the sliding pin (13) is slidingly arranged on the side surface of the sleeve (9), and the handle (14) is installed at one end of the sliding pin (13).

2. A bone screw pull-out and torque testing machine as claimed in claim 1, characterized in that: The mounting adjusting mechanism comprises a longitudinal plate (15), a lateral plate (16), an adjusting hole (17), an adjusting bolt (18), a knob (19) and an adjusting nut (20), the working seat (1) is fixedly installed on the longitudinal plate (15), the lateral plate (16) is installed on both sides of the mounting plate (8), the adjusting nut (20) is installed at the top end of the lateral plate (16), a plurality of adjusting holes (17) are throughly arranged on the adjusting plate (7) and the longitudinal plate (15), the adjusting bolt (18) can pass through different adjusting holes (17) and extend through the lateral plate (16) and be connected with the adjusting nut (20), and the knob is installed at one end of the adjusting bolt (18).

3. A bone screw pull-out and torque testing machine as defined in claim 1, wherein: The side surface of the sleeve (9) is provided with a pressing frame (21), and the pressing frame (21) is provided with a pressing cylinder (22) and a guide frame (23).

4. A bone screw pull-out and torque testing machine as defined in claim 3, wherein: One end of the pressing cylinder (22) extends through the pressing frame (21) and is connected with a pressing plate (401), and one end surface of the pressing plate (401) is provided with a pressing block (24).

5. A pull-out and torque tester for bone screws as defined in claim 4, characterized in that: The sleeve pressing mechanism is symmetrically arranged, and the symmetric pressing blocks (24) are opposite to the two ends of the compression bone screw.

6. A pull-out and torque tester for bone screws as defined in claim 4, characterized in that: One end of the pressing plate (401) is provided with a guide rod (25), and the guide rod (25) is slidingly guided in cooperation with the guide frame (23).

7. A pull-out and torque tester for bone screws as defined in claim 1, characterized in that: The locking ring (11) and the bottom ring (10) are provided with rubber pads (26), and the inner wall of the rubber pad (26) presses the outer surface of the compression bone screw.

8. A pull-out and torque tester for bone screws as defined in claim 2, characterized in that: The bottom of the longitudinal plate (15) is provided with a bottom plate (27), and the bottom plate (27) is in contact with the ground at a required position.

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