CN117848630A - Fatigue test device for balance tension spring - Google Patents
Fatigue test device for balance tension spring Download PDFInfo
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- CN117848630A CN117848630A CN202410251374.4A CN202410251374A CN117848630A CN 117848630 A CN117848630 A CN 117848630A CN 202410251374 A CN202410251374 A CN 202410251374A CN 117848630 A CN117848630 A CN 117848630A
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- 238000009661 fatigue test Methods 0.000 title claims abstract description 40
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- 238000012360 testing method Methods 0.000 description 9
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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
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
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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
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Abstract
The invention relates to the technical field of fatigue tests, and discloses a fatigue test device for a balance tension spring, which comprises: the machine table is connected with a clamping unit, a loading unit and an annular detection unit, wherein the loading unit is connected to a cross beam at the top of the machine table and used for driving an upper clamping plate of the clamping unit to move in the vertical direction, a lower clamping plate of the clamping unit is connected to a table top at the bottom of the machine table, two ends of a balance tension spring to be detected are respectively connected with the upper clamping plate and the lower clamping plate, the annular detection unit is connected to the side wall of the machine table and can slide along the vertical direction, the annular detection unit surrounds the balance tension spring, and a camera used for acquiring a surface image of the balance tension spring is connected to the annular detection unit. According to the invention, different fatigue test conditions can be set for the balance tension spring according to the stroke, the movement speed and the movement times of the spring set by a user, the power source is stable, the movable annular detection unit acquires surface images of all positions of the balance tension spring, and the crack and failure conditions of the balance tension spring are monitored.
Description
Technical Field
The invention relates to the technical field of fatigue tests, in particular to a fatigue test device for a balance tension spring.
Background
The spring fatigue refers to the process that the microstructure and materials in the spring change due to repeated bending and stretching actions and periodical load influence in the use process of the mechanical spring, so that the mechanical property of the spring is gradually reduced, and the defects such as cracks, defects, scars and the like generated by the spring material are common causes of fatigue fracture of the spring. The balance tension spring is a spring product, and a fatigue test is required when the balance tension spring leaves a factory.
In the prior art, as in the chinese patent of application number 202321213880.1, a spring fatigue degree check out test set for spring production is disclosed, including check out test set body and support, the surface of check out test set body and the tip fixed connection of support, the internally mounted of support has the pneumatic cylinder, the output rigid coupling and the last diaphragm of pneumatic cylinder, the inside of support is equipped with protection machanism, the inside of check out test set body is equipped with adjustment mechanism. The device covers the spring body through the cover body, if the spring body breaks, broken spring residues cannot be sputtered out, and the safety of the test is improved. However, in the test process, a detector observes the surface of the spring through naked eyes, so that the crack and failure condition on the spring cannot be accurately monitored. Accordingly, there is a need for a balance tension spring fatigue test apparatus that at least partially addresses the problems of the prior art.
Disclosure of Invention
In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description. The summary of the invention is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
In order to solve the above problems at least in part, the present invention provides a fatigue test apparatus for a balance tension spring, comprising:
the machine table is connected with a clamping unit, a loading unit and an annular detection unit, wherein the loading unit is connected to a cross beam at the top of the machine table and used for driving an upper clamping plate of the clamping unit to move in the vertical direction, a lower clamping plate of the clamping unit is connected to a table top at the bottom of the machine table, two ends of a balance tension spring to be detected are respectively connected with the upper clamping plate and the lower clamping plate, the annular detection unit is connected to the side wall of the machine table and can slide along the vertical direction, the annular detection unit surrounds the balance tension spring, and a camera used for acquiring a surface image of the balance tension spring is connected to the annular detection unit.
Preferably, the upper clamping plate is internally connected with a force sensor and a distance sensor, the force sensor is used for detecting the tensile force received when the upper clamping plate is connected with the balance tension spring, the free state of the balance tension spring is estimated, and the distance sensor is used for detecting the length of the balance tension spring.
Preferably, the loading unit includes: the hydraulic cylinder is connected to the cross beam at the top of the machine table, and the bottom end of the rod part of the hydraulic cylinder is connected with the upper clamping plate; the guide rods are connected to the top end of the upper clamping plate and are in sliding connection with guide holes in the cross beam at the top of the machine table, and the number of the guide rods is at least two.
Preferably, the lateral wall of the machine table is connected with a guide rail and a screw rod, the annular detection unit is slidably connected in the guide rail, the screw rod is in threaded connection with the end part of the annular detection unit, and the bottom end of the screw rod is connected with the output end of the screw rod motor.
Preferably, the annular detection unit includes:
the fixed seat is provided with a wedge-shaped sliding block at one end, the wedge-shaped sliding block is connected in the guide rail in a sliding manner, and a threaded hole in the center of the fixed seat is in threaded connection with the screw rod;
the first support frames are connected to the side surfaces of the fixing base at one end, and the first support frames are symmetrically arranged on the two sides of the fixing base;
arc detects the frame, and arc detects the frame and articulates in a support frame other end, and two arc detects the frame symmetry setting and around forming annular space, evenly is connected with a plurality of camera installing frames on the arc detects the frame, and camera leg joint is in the camera installing frame, installs the camera on the camera support.
Preferably, the arc detection frame is connected with a worm wheel on a hinge shaft of the first support frame, one end of a worm is rotationally connected to the end part of the fixed seat through a worm rotating shaft, the worm is simultaneously meshed with the two worm wheels, and the other end of the worm is connected with an adjusting knob.
Preferably, the annular detection unit further includes: the horizontal rod section of the retainer is arranged in a telescopic way, two ends of the retainer are bent downwards, and two ends of the retainer are respectively connected with the top of the arc-shaped detection frame and the top of the fixing seat in a rotating way.
Preferably, the annular detection unit comprises an angle adjustment assembly comprising:
the second support is connected to the upper surface and the lower surface of the fixed seat, bends towards the worm direction, and a vertically arranged sliding rod is connected to the bending end of the second support;
the sliding frames are arranged to be connected to the two sliding rods in a rotating mode at the same time, and the sliding frames and the sliding rods slide relatively;
the arc-shaped adjusting frame is connected to the other end of the sliding frame and arranged outside the arc-shaped detecting frame, and a tensioning spring is connected between the arc-shaped adjusting frame and the fixing seat.
Preferably, the camera mounting frame is horizontally connected with a center rod, the middle part of the camera support is rotationally connected to the center rod, the inner side end of the camera support is connected with the camera, an adjusting groove is formed in the arc-shaped adjusting frame in a penetrating manner, the outer side end of the camera support is connected with the adjusting groove, and the camera support is not separated from the arc-shaped adjusting frame.
Preferably, one side of the fixing seat, which is close to the worm, is rotationally connected with a first gear and a cam, the first gear and the cam are coaxially arranged, a worm rotating shaft penetrates through the first gear and the cam and rotates relatively, one side of the gear is in meshed connection with a second gear, the second gear rotating shaft is connected with an output end of a motor arranged on the fixing seat, and the cam is connected in the sliding frame and always keeps contact with the sliding frame.
Compared with the prior art, the invention at least comprises the following beneficial effects:
according to the fatigue test device for the balance tension spring, provided by the invention, different fatigue test conditions can be set for the balance tension spring according to the stroke, the movement speed and the movement times of the spring set by a user, the power source is stable, the movable annular detection unit is arranged on the machine, the balance tension spring is monitored in an omnibearing manner, the surface images of all positions of the balance tension spring are obtained, the crack and failure conditions of the balance tension spring are monitored, and the fatigue test device plays a guiding role in the test process.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of a conventional spring fatigue test apparatus;
FIG. 2 is a schematic structural view of a fatigue testing device for a balance tension spring according to the present invention;
FIG. 3 is a schematic diagram of the structure of the annular detecting unit in the present invention;
FIG. 4 is a schematic view of an angle adjusting assembly according to the present invention;
FIG. 5 is a schematic view of a partial structure of a camera mounting frame according to the present invention;
FIG. 6 is a schematic diagram of a sliding frame according to the present invention;
FIG. 7 is a schematic view showing the installation structure of the clamping plate adjusting unit of the present invention;
FIG. 8 is a first angular configuration of the clamping plate adjusting unit of the present invention;
FIG. 9 is a second angular schematic view of the clamping plate adjusting unit of the present invention;
fig. 10 is a schematic view of a partial structure of the vicinity of the toothed ring in the clamping plate adjusting unit of the present invention.
In the figure: 1. a machine table; 2. a clamping plate is arranged on the upper part; 3. a clamping plate is arranged under the lower part; 4. a balance tension spring; 5. a hydraulic cylinder; 6. a guide rod; 7. a guide rail; 8. a screw rod; 9. a wedge-shaped slide block; 11. a fixing seat; 12. a first supporting frame; 13. an arc-shaped detection frame; 14. a camera mounting frame; 15. a camera bracket; 16. a worm wheel; 17. a worm; 18. an adjustment knob; 19. a retainer; 20. a worm shaft; 21. a second supporting frame; 22. a slide bar; 23. a sliding frame; 24. an arc-shaped adjusting frame; 25. tensioning the spring; 26. a central rod; 27. a first gear; 28. a cam; 29. an adjustment tank; 31. fixing the column; 32. a toothed ring; t-frame; t-shaped rack slots; t-shaped slider; 36. fluted disc; 37. a fluted disc shaft; 38. a turntable; 39. bending a rod; 40. a first connecting rod; 41. a second connecting rod; 42. a connecting column; 43. a support rod; 44. a guide chute; 45. and a guide block.
Detailed Description
The present invention is described in further detail below with reference to the drawings and examples to enable those skilled in the art to practice the invention by referring to the description.
It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
Example 1:
as shown in fig. 2, the present invention provides a fatigue test apparatus for a balance tension spring, comprising:
the machine table 1, be connected with clamping unit on the machine table 1, loading unit and annular detecting element, loading unit connects on machine table 1 top crossbeam, be used for driving clamping unit's last clamping board 2 to follow vertical direction and remove, clamping unit's lower clamping board 3 is connected on machine table 1 bottom mesa, wait to detect balanced extension spring 4 both ends are connected with last clamping board 2 and lower clamping board 3 respectively, annular detecting element connects in machine table 1 lateral wall, and can follow vertical direction and slide, annular detecting element encircles balanced extension spring 4 setting, be connected with the camera that is used for obtaining balanced extension spring 4 surface image on the annular detecting element.
The loading unit includes: the hydraulic cylinder 5 and the guide rod 6 are connected with the top cross beam of the machine table 1, and the bottom end of the rod part of the hydraulic cylinder 5 is connected with the upper clamping plate 2; the guide rods 6 are connected to the top end of the upper clamping plate 2 and are in sliding connection with guide holes in a cross beam at the top of the machine table 1, and the number of the guide rods 6 is at least two.
The working principle and the beneficial effects of the technical scheme are as follows:
when the fatigue test device for the balance tension spring is used, two ends of the balance tension spring 4 to be detected are respectively connected and fixed with the upper clamping plate 2 and the lower clamping plate 3 of the clamping unit, and when the fatigue test device is used for detecting, the loading unit moves the clamping plate 2 to enable the balance tension spring 4 to be in a free state, namely, the length of the balance tension spring in an unstressed state is maintained; according to the spring travel, the movement speed and the movement times set by a user, the movement mode of the loading unit, namely the movement mode of the hydraulic cylinder 5, is set, the upper clamping plate 2 is driven to move through the hydraulic cylinder 5, the balance tension spring 4 is circularly stretched and loaded, the number of loading times is detected through a counter, and the guiding effect of the guide rod 6 is ensured, so that the loading direction is accurate. In the test process, the annular detection unit surrounds the outer side of the balance spring 4, the plurality of cameras arranged on the annular detection unit shoot all the angle positions of the balance spring 4, the annular detection unit moves in the vertical direction to shoot different heights of the balance spring 4, so that crack conditions of all the positions of the balance spring 4 can be obtained, and crack image data are stored and can be displayed on the display screen for reference evaluation of detection personnel.
Through the above-mentioned structural design, provide a fatigue test device for balanced extension spring, can set for different fatigue test conditions to balanced extension spring 4 according to the spring stroke that the user set for, movement speed and number of times of movement, set up the action mode of loading unit, and the power supply is stable, set up mobilizable annular detecting element on board 1, carry out the omnidirectional monitoring to balanced extension spring 4, acquire the surface image of balanced extension spring 4 each position department, monitor the crackle and the failure condition of balanced extension spring 4, play the instruction effect to the test process.
Example 2:
on the basis of the above embodiment 1, a force sensor for detecting the tensile force received when the upper clamping plate 2 is connected with the balance tension spring 4, evaluating the free state of the balance tension spring 4, and a distance sensor for detecting the length of the balance tension spring 4 are connected in the upper clamping plate 2.
The working principle and the beneficial effects of the technical scheme are as follows:
a force sensor is arranged in the upper clamping plate 2 and used for detecting the pulling pressure applied when the upper clamping plate 2 is connected with the balance tension spring 4, when the balance spring 4 is in a free state, namely the balance spring 4 is not subjected to the pulling pressure, the value detected by the force sensor is extremely small or no detection data, a unit is loaded under the condition before the fatigue test, so that the balance spring 4 is in the free state, and the distance between the upper clamping plate 2 and the lower clamping plate 3 is detected through a distance sensor and is set to be the initial length of the balance spring 4; after the fatigue test is finished, the loading unit is adjusted again, so that the balance spring 4 is in a free state again, the distance between the upper clamping plate 2 and the lower clamping plate 3 is detected through the distance sensor again, the fatigue length of the balance spring 4 is set, and the deformation condition of the balance spring 4 after the fatigue test can be obtained through the comparison of the fatigue length and the initial length.
Example 3:
as shown in fig. 2, on the basis of the above embodiment 1, the side wall of the machine 1 is connected with a guide rail 7 and a screw rod 8, the annular detection unit is slidably connected in the guide rail 7, the screw rod 8 is screwed with the end of the annular detection unit, and the bottom end of the screw rod 8 is connected with the output end of the screw rod motor.
The working principle and the beneficial effects of the technical scheme are as follows:
the lateral wall of board 1 is provided with lead screw 8, and lead screw 8 and annular detecting element tip spiro union, and when annular detecting element altitude mixture control, start lead screw motor drive lead screw 8 and rotate, lead screw 8 drive annular detecting element reciprocates, and guide rail 7 plays the guide effect to annular detecting element.
Example 4:
as shown in fig. 3 to 6, on the basis of the above embodiment 1, the ring-shaped detection unit includes:
the fixed seat 11, one end of the fixed seat 11 is provided with a wedge-shaped sliding block 9, the wedge-shaped sliding block 9 is connected in the guide rail 7 in a sliding manner, and a threaded hole in the center of the fixed seat 11 is in threaded connection with the screw rod 8;
one end of the first support frame 12 is connected to the side face of the fixed seat 11, and the first support frames 12 are symmetrically arranged on two sides of the fixed seat 11;
the arc detects frame 13, and arc detects frame 13 articulates in support frame one 12 other end, and two arc detects frame 13 symmetry sets up and around forming annular space, evenly is connected with a plurality of camera installing frame 14 on the arc detects frame 13, and camera support 15 connects in camera installing frame 14, installs the camera on the camera support 15.
The working principle and the beneficial effects of the technical scheme are as follows:
when the annular detection unit is used, the annular detection unit is connected with the guide rail 7 and the screw rod 8 through the fixing seat 11; wedge slider 9 sliding connection on fixing base 11 guarantees in guide rail 7 that fixing base 11 is difficult for deviating from in the direction, and fixing base 11 both sides set up support frame one 12, support fixedly to arc detection frame 13 through support frame one 12, a plurality of camera installing frame 14 that set up on the arc detection frame 13 for fixed camera. Through above-mentioned structural design, set up a plurality of cameras around balanced extension spring 4, carry out the multi-angle to balanced extension spring 4 and shoot in coordination, effectively realize the comprehensive control of balanced extension spring 4 each height and angular position department, discovery crackle and failure position that can be more timely reduce the degree of difficulty of manual observation crackle.
Example 5:
as shown in fig. 3 to 6, on the basis of the above embodiment 4, a worm wheel 16 is connected to the hinge shaft of the arc detection frame 13 and the first support frame 12, one end of a worm 17 is rotatably connected to the end of the fixed seat 11 through a worm rotating shaft 20, the worm 17 is simultaneously engaged with and connected to the two worm wheels 16, and the other end of the worm 17 is connected to an adjusting knob 18.
The annular detection unit further includes: the retainer 19, the horizontal pole section of retainer 19 telescopic setting, the both ends of retainer 19 buckle downwards, and the both ends of retainer 19 are connected with arc detection frame 13 top and fixing base 11 top rotation respectively.
The working principle and the beneficial effects of the technical scheme are as follows:
when the balance tension spring 4 is subjected to a fatigue test, the different diameters of the balance tension spring 4 influence the shooting effect of the camera. Therefore, an adjusting component is arranged, when in use, the adjusting knob 18 is rotated to drive the worm 16 to rotate, the worm 16 is meshed with the worm wheels 16 at two sides to drive the two worm wheels 16 to synchronously rotate, so that the arc-shaped detection frame 13 can be synchronously unfolded or folded. When 13 exhibition framves of arc detection frame, the annular detection space that its formed is bigger, can adapt to the great balanced extension spring 4 of diameter, guarantees the distance between camera and the balanced extension spring 4, guarantees the shooting effect.
The arc detection frame 13 is connected with the fixed seat 11 through the retainer 19, so that the connection stability between the arc detection frame 13 and the fixed seat 11 can be maintained, the shaking in the moving process is reduced, and a stable mounting platform is provided for the camera; the horizontal rod end of the weapon retainer 19 is telescopically arranged, so that the weapon retainer can adapt to different position states of the arc-shaped detection frame 13, and the weapon retainer is not blocked from moving.
Example 6:
as shown in fig. 3 to 6, on the basis of the above-described embodiment 5, the ring-shaped detecting unit includes an angle adjusting assembly including:
the second support frame 21 is connected to the upper surface and the lower surface of the fixed seat 11, and bends towards the direction of the worm 17, and a vertically arranged slide bar 22 is connected to the bending end of the second support frame 21;
the sliding frames 23, the sliding frames 23 are arranged to be connected to two sliding rods 22 in a rotating way at the same time, and the sliding frames 23 and the sliding rods 22 slide relatively;
the arc-shaped adjusting frame 24, the arc-shaped adjusting frame 24 is connected with the other end of the sliding frame 23 and arranged outside the arc-shaped detecting frame 13, and a tensioning spring 25 is connected between the arc-shaped adjusting frame 24 and the fixed seat 11.
The camera mounting frame 14 is internally and horizontally connected with a center rod 26, the middle part of a camera support 15 is rotationally connected to the center rod 26, the inner side end of the camera support 15 is connected with a camera, an adjusting groove 29 is penetrated and arranged in an arc-shaped adjusting frame 24, the outer side end of the camera support 15 is connected with the adjusting groove 29, and the camera support 15 is not separated from the arc-shaped adjusting frame 24.
The fixed seat 11 is connected with a first gear 27 and a cam 28 in a rotating way on one side close to the worm 17, the first gear 27 and the cam 28 are coaxially arranged, the worm rotating shaft 20 penetrates through the first gear 27 and the cam 28 and rotates relatively, a second gear is connected to one side of the first gear 27 in a meshed way, the second gear rotating shaft is connected with an output end of a motor arranged on the fixed seat 11, and the cam 28 is connected in the sliding frame 23 and keeps contact with the sliding frame 23 all the time.
The working principle and the beneficial effects of the technical scheme are as follows:
when the arc-shaped detection frame 13 does not move to carry out targeted shooting detection on the part of the balance tension spring 4, the motor is started to drive the gear II rotating shaft to rotate, the gear II is meshed with the gear I27 to drive the gear I27 to rotate, the gear I27 drives the cam 28 to synchronously rotate, through holes for the worm wheel rotating shaft 20 to pass through are formed in the centers of the gear I27 and the cam 27, and the worm wheel rotating shaft 20 passes through the gear I27 and the cam 28 and can relatively rotate, so that interference on the worm wheel rotating shaft 20 does not occur; the cam 28 is always in contact with the sliding frame 23, and the sliding frame 23 is driven to slide on the sliding rod 22 along with the rotation of the cam 28, namely, the height of the sliding frame 23 is adjusted, and the sliding frame 23 drives the arc-shaped adjusting frame 24 to synchronously rotate, so that the height of the arc-shaped adjusting frame 24 is adjusted. The arc-shaped adjusting frame 24 drives the outer side end of the camera support 15 to rotate, so that the angle of the camera is adjusted, the camera is subjected to line shooting in a preset range of the current position, an expansion image of a crack at the current position is conveniently obtained, and a basis is provided for crack expansion and failure prediction. A limiting groove and a limiting column are respectively arranged in the camera bracket 15 and the adjusting groove 29, and sufficient space for the movement of the limiting column is reserved in the limiting groove, so that the camera bracket 15 can slide relative to the arc-shaped adjusting frame 24 but is not separated; the arc-shaped adjusting frame 24 can be pulled to synchronously rotate when the arc-shaped detecting frame 13 rotates.
Through the above structural design, through the camera rotation, enlarge the shooting scope of camera in current position, effectively realized the pertinence shooting to balanced extension spring 4 current position preset range, be convenient for acquire the extension image of current position crackle, provide the basis to crack extension and inefficacy prediction, the adjustment process passes through cam 28 drive realization, and the transmission is steady, keeps the stability that the camera was shot, reduces the image shake.
Example 7:
on the basis of the above embodiment 5, the mode of detecting movement in the vertical direction in embodiment 4 is set to the first detection mode, the mode of detecting partial rotation in embodiment 6 is set to the second detection mode, and the controller performs a fatigue test according to a mechanical simulation analysis of the balance tension spring 4, specifically:
s100, calculating the theoretical life of the balance tension spring 4 according to the specification and the size of the balance tension spring 4;
s200, establishing a finite element model of the balance tension spring 4, applying tension to perform simulation calculation, and determining the fatigue failure position, namely a weak point, of the balance tension spring 4;
s300, performing a fatigue test on the balance tension spring 4, stopping tension loading when the stretching times reach 10%, 20% and 90% of the preset service life, starting the annular detection unit to adopt a first detection mode, and acquiring a full-range surface image of the balance tension spring 4 for evaluation;
s400, determining an actual crack area or a weak point according to the surface image of the balance tension spring 4, comprehensively analyzing to obtain a detection point, moving the annular detection unit to the detection point, and starting a second detection mode; when the surface of the balance tension spring 4 has cracks, setting the maximum crack position as a detection point; when no crack appears on the surface of the balance tension spring 4, the weak point obtained by simulation calculation is set as a detection point;
and S500, loading is continued until the balance tension spring 4 fails, and at the moment, the fatigue test is completed, so that the actual service life and crack extension trend of the balance tension spring 4 are obtained.
Example 8:
as shown in fig. 7 to 10, on the basis of the above embodiment 1, a clamping plate adjusting unit is provided at the lower part of the machine 1, the clamping plate adjusting unit including:
the guide chute 44 is arranged on the table top at the bottom of the machine table 1, the guide chute 44 is connected with a guide block 45 in a sliding way, and the guide block 45 is connected with the lower clamping plate 3;
the fixed column 31, the fixed column 31 connects in the cavity of the bottom of the machine 1, the fixed column 31 connects with the electrical machinery;
the gear ring 32, the gear ring 32 rotates and sets up in the outside of the fixed column 31, and connect with motor output shaft through the drive mechanism, the gear ring 32 is set up coaxially with fixed column 31;
the T-shaped frame 33, the T-shaped frame 33 is connected to the side end of the fixed column 31 and extends towards the direction of the guide block 45, the T-shaped frame 33 is provided with a T-shaped frame groove 34 along the length direction, the T-shaped frame groove 34 is slidably connected with a T-shaped slide block 35, and a spring is connected between the T-shaped slide block 35 and the end part of the T-shaped frame groove 34;
the fluted disc 36, the fluted disc 36 center rotates and connects to the fluted disc shaft 37 on the top of the T-type slide block 35, the fluted disc 36 is set up as the oval fluted disc;
the turntables 38, the turntables 38 are rotatably connected to the cross beam of the T-shaped frame 33, and the two turntables 38 are symmetrically arranged along the width direction of the T-shaped frame 33;
the bent rod 39, one end of the bent rod 39 is connected to the fluted disc shaft 37, and the other end is eccentrically hinged to the turntable 38;
one end of the first connecting rod 40 and one end of the second connecting rod 41 are mutually hinged, the other end of the first connecting rod 40 is connected to the turntable 38, and the other end of the second connecting rod 41 extends towards the direction of the guide block 45;
the connecting column 42, the connecting column 42 connects to another end of the second connecting rod 41, and connect to the lower side of the guide block 45;
the bracing piece 43, bracing piece 43 connect between fixed column 31 and spliced pole 42, and bracing piece 43 sets up to the telescopic, includes a plurality of relative slip pole sections on the bracing piece 43, and each pole section size reduces gradually by fixed column 31 to spliced pole 42 direction, and the inside relative seal of each pole section is provided with one-way admission valve and one-way air outlet valve on the bracing piece 43.
The working principle and the beneficial effects of the technical scheme are as follows:
when the balance tension spring 4 is used, the balance tension spring cannot always bear force along the length direction, so that the stress state of the balance tension spring 4 is simulated more truly in a fatigue test, and the installation angle of the balance tension spring 4 is required to be adjusted. The balance tension spring 4 can form a preset angle by moving the position of the lower clamping plate 3 to be staggered with the upper clamping plate 2. When the clamping plate adjusting unit is used, a motor on the fixed column 31 is started, the motor drives the toothed ring 32 to rotate through a transmission mechanism, and one implementation mode of the transmission mechanism is as follows: the inner wall of the toothed ring 32 is provided with a latch, a driving gear is connected to the output shaft of the motor, and the toothed ring 32 is driven to rotate through the meshing transmission of the driving gear and the latch. The toothed ring 32 is meshed with the toothed disc 36 for transmission when rotating, and the toothed disc 36 is an oval toothed disc, so that when the toothed disc 36 rotates, the center of the toothed disc 36 moves along the horizontal direction, the toothed disc shaft 37 drives the T-shaped sliding block 35 to slide along the T-shaped frame groove 34, and the T-shaped frame groove 34 plays a role in guiding the movement of the toothed disc shaft 37, so that the T-shaped sliding block can horizontally reciprocate in the direction of the guiding block 45. The fluted disc shaft 37 drives the bent rod 39 to move, the other end of the bent rod 39 drives the rotary disc 38 to rotate, the rotary disc 38 simultaneously expands or closes the first two connecting rods 40, when the first two connecting rods 40 are simultaneously expanded, the second two connecting rods 41 are also expanded, the distance between the fixed column 31 and the connecting column 42 is reduced, and the connecting column 42 pulls the guide block 45 to enable the lower clamping plate 3 to move to one side, so that the position of the lower clamping plate 3 is adjusted in the positive direction; when the two first connecting rods 41 are close to each other, the two second connecting rods 41 are also close to each other, the distance between the fixed column 31 and the connecting column 42 is increased, and the connecting column 42 pulls the guide block 45 to enable the lower clamping plate 3 to move to the other side, so that the position of the lower clamping plate 3 is reversely adjusted. When the connecting column 42 moves, the supporting rod 43 is driven to stretch, each rod section of the supporting rod 43 contracts or expands along the horizontal direction, the connecting column 42 is guided, and when each rod section contracts, the one-way air outlet valve is opened, so that air flow is discharged; when each rod section is unfolded, the one-way air inlet valve is opened, and the one-way air inlet valve is closed, so that the support rods 43 are not moved after being unfolded to a preset position, and the stability of the lower clamping plate 3 in the fatigue test process is maintained.
Through the structural design, the position of the lower clamping plate 3 is fixed by adopting a mode of combining air pressure support and mechanical support, particularly, when the supporting rods 43 are unfolded, air can be fed in one direction, so that the inside of the supporting rods 43 can keep stable air pressure to avoid the reverse movement of the connecting columns 42; the oval fluted disc 36 and the eccentric connection turntable 38 are adopted, the resistance to overcome in the transmission link and the transmission is increased, the possibility of the reverse movement of the connecting column 42 is reduced, more effective support is provided for the connecting column 42, the stability of the lower clamping plate 3 in the fatigue test process is maintained, and the angle of the balance tension spring 4 is more accurate.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (10)
1. A fatigue test device for a balance tension spring, comprising:
the device comprises a machine table (1), wherein a clamping unit is connected to the machine table (1), a loading unit and an annular detection unit are connected to a top cross beam of the machine table (1), an upper clamping plate (2) for driving the clamping unit moves along the vertical direction, a lower clamping plate (3) of the clamping unit is connected to a table top at the bottom of the machine table (1), two ends of a balance tension spring (4) to be detected are respectively connected with the upper clamping plate (2) and the lower clamping plate (3), the annular detection unit is connected to the side wall of the machine table (1) and can slide along the vertical direction, the annular detection unit surrounds the balance tension spring (4) and is connected with a camera for acquiring surface images of the balance tension spring (4).
2. The fatigue test device for the balance tension spring according to claim 1, wherein the upper clamping plate (2) is connected with a force sensor and a distance sensor, the force sensor is used for detecting the tensile force received when the upper clamping plate (2) is connected with the balance tension spring (4), the free state of the balance tension spring (4) is evaluated, and the distance sensor is used for detecting the length of the balance tension spring (4).
3. The fatigue testing device for a balance tension spring according to claim 1, wherein the loading unit comprises: the hydraulic cylinder (5) and the guide rod (6), the hydraulic cylinder (5) is connected to the top cross beam of the machine table (1), and the bottom end of the rod part of the hydraulic cylinder (5) is connected with the upper clamping plate (2); the guide rods (6) are connected to the top end of the upper clamping plate (2) and are in sliding connection with guide holes in the cross beam at the top of the machine table (1), and the number of the guide rods (6) is at least two.
4. The fatigue test device for the balance tension spring according to claim 1, wherein the side wall of the machine table (1) is connected with a guide rail (7) and a screw rod (8), the annular detection unit is slidably connected in the guide rail (7), the screw rod (8) is in threaded connection with the end part of the annular detection unit, and the bottom end of the screw rod (8) is connected with the output end of a screw rod motor.
5. The fatigue testing device for a balance tension spring according to claim 4, wherein the ring-shaped detecting unit comprises:
the device comprises a fixed seat (11), wherein one end of the fixed seat (11) is provided with a wedge-shaped sliding block (9), the wedge-shaped sliding block (9) is connected in a guide rail (7) in a sliding manner, and a threaded hole in the center of the fixed seat (11) is in threaded connection with a screw rod (8);
one end of the first support frame (12) is connected to the side face of the fixed seat (11), and the two first support frames (12) are symmetrically arranged on two sides of the fixed seat (11);
arc detects frame (13), and arc detects frame (13) articulates in support frame one (12) other end, and two arc detects frame (13) symmetry sets up and around forming annular space, evenly is connected with a plurality of camera installing frame (14) on arc detects frame (13), and camera support (15) are connected in camera installing frame (14), install the camera on camera support (15).
6. The fatigue test device for the balance tension spring according to claim 5, wherein a worm wheel (16) is connected to a hinge shaft of the arc-shaped detection frame (13) and the first support frame (12), one end of a worm (17) is rotatably connected to the end of the fixed seat (11) through a worm rotating shaft (20), the worm (17) is simultaneously meshed with the two worm wheels (16), and the other end of the worm (17) is connected with an adjusting knob (18).
7. The fatigue testing device for a balance tension spring according to claim 5, wherein the ring-shaped detecting unit further comprises: the horizontal rod section of the retainer (19) is arranged in a telescopic mode, two ends of the retainer (19) are bent downwards, and two ends of the retainer (19) are respectively connected with the top of the arc-shaped detection frame (13) and the top of the fixing seat (11) in a rotating mode.
8. The fatigue testing device for a balance tension spring according to claim 6, wherein the annular detecting unit includes an angle adjusting assembly, the angle adjusting assembly including:
the second support frame (21), the second support frame (21) is connected to the upper and lower surfaces of the fixed seat (11), and bends towards the direction of the worm (17), and a slide bar (22) arranged vertically is connected to the bending end of the second support frame (21);
the sliding frames (23), the sliding frames (23) are arranged to be connected to two sliding rods (22) in a rotating mode at the same time, and the sliding frames (23) and the sliding rods (22) slide relatively;
the arc-shaped adjusting frame (24), the arc-shaped adjusting frame (24) is connected to the other end of the sliding frame (23) and arranged on the outer side of the arc-shaped detecting frame (13), and a tensioning spring (25) is connected between the arc-shaped adjusting frame (24) and the fixed seat (11).
9. The fatigue test device for the balance tension spring according to claim 8, wherein a center rod (26) is horizontally connected in the camera mounting frame (14), the middle part of the camera support (15) is rotationally connected to the center rod (26), the inner side end of the camera support (15) is connected with the camera, an adjusting groove (29) is formed in the arc-shaped adjusting frame (24) in a penetrating manner, the outer side end of the camera support (15) is connected with the adjusting groove (29), and the camera support (15) is not separated from the arc-shaped adjusting frame (24).
10. The fatigue test device for the balance tension spring according to claim 9, wherein one side of the fixed seat (11) close to the worm (17) is rotatably connected with a first gear (27) and a cam (28), the first gear (27) and the cam (28) are coaxially arranged, the worm rotating shaft (20) penetrates through the first gear (27) and the cam (28) and rotates relatively, one side of the first gear (27) is in meshed connection with a second gear, the second gear rotating shaft is connected with an output end of a motor arranged on the fixed seat (11), and the cam (28) is connected in the sliding frame (23) and keeps contact with the sliding frame (23) all the time.
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| CN202410251374.4A CN117848630B (en) | 2024-03-06 | 2024-03-06 | Fatigue test device for balance tension spring |
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| CN202410251374.4A CN117848630B (en) | 2024-03-06 | 2024-03-06 | Fatigue test device for balance tension spring |
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| CN117848630B CN117848630B (en) | 2024-05-14 |
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| CN102692347A (en) * | 2012-05-08 | 2012-09-26 | 浙江工业大学 | Camera automatic regulating image acquisition device and method for fatigue crack propagation test |
| CN206177561U (en) * | 2016-09-22 | 2017-05-17 | 儒拉玛特自动化技术(苏州)有限公司 | Fine or not detection mechanism of extension spring |
| CN210036547U (en) * | 2019-08-07 | 2020-02-07 | 东莞市瑞科智能科技有限公司 | Spring detection machine |
| CN116558857A (en) * | 2023-06-16 | 2023-08-08 | 中国第一汽车股份有限公司 | Air spring assembly test system and method |
| CN117168793A (en) * | 2023-09-27 | 2023-12-05 | 深圳市中深爱的寝具科技有限公司 | Spring fatigue detection device and method |
| CN220322688U (en) * | 2023-05-19 | 2024-01-09 | 安吉旺利转椅配件股份有限公司 | Spring fatigue degree detection equipment for spring production |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102692347A (en) * | 2012-05-08 | 2012-09-26 | 浙江工业大学 | Camera automatic regulating image acquisition device and method for fatigue crack propagation test |
| CN206177561U (en) * | 2016-09-22 | 2017-05-17 | 儒拉玛特自动化技术(苏州)有限公司 | Fine or not detection mechanism of extension spring |
| CN210036547U (en) * | 2019-08-07 | 2020-02-07 | 东莞市瑞科智能科技有限公司 | Spring detection machine |
| CN220322688U (en) * | 2023-05-19 | 2024-01-09 | 安吉旺利转椅配件股份有限公司 | Spring fatigue degree detection equipment for spring production |
| CN116558857A (en) * | 2023-06-16 | 2023-08-08 | 中国第一汽车股份有限公司 | Air spring assembly test system and method |
| CN117168793A (en) * | 2023-09-27 | 2023-12-05 | 深圳市中深爱的寝具科技有限公司 | Spring fatigue detection device and method |
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