CN113267418B - Chain hinge pair wear resistance test device and method - Google Patents
Chain hinge pair wear resistance test device and method Download PDFInfo
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- CN113267418B CN113267418B CN202110719963.7A CN202110719963A CN113267418B CN 113267418 B CN113267418 B CN 113267418B CN 202110719963 A CN202110719963 A CN 202110719963A CN 113267418 B CN113267418 B CN 113267418B
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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
- G01N3/56—Investigating resistance to wear or abrasion
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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
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
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Abstract
The utility model provides a vice wear test device of chain hinge and method, relates to chain wear test technical field, the hinge vice include part A and part B, test device include the workstation, fixed square mounting bracket, the loading unit and the pendulum shaft unit of locating the workstation upper surface, the method part is through loading unit and pendulum shaft unit simulation hinge pair motion friction to friction performance quantitative analysis of hinge pair. The invention provides a chain hinge pair wear resistance test device and method, which can eliminate irrelevant interference, realize a wear resistance test of a chain appointed hinge pair, ensure accurate and controllable test parameters and realize quantitative analysis of the wear resistance of the chain hinge pair.
Description
Technical Field
The invention relates to the technical field of chain wear-resisting tests, in particular to a chain hinge pair wear-resisting test device and method.
Background
The chain is an assembly formed by connecting components which are the same or have the same interval in series in a kinematic pair mode, the service life of the chain is directly determined by the wear resistance of the chain, and a wear resistance test of a chain hinge pair is necessary.
At present, the wear resistance test widely adopted in the industry takes chain elongation detection under test conditions within a certain time as a main evaluation standard. The chain is usually worn out and led to the rapid elongation because of some kind or some parts bad emergence in it, and the appearance of other hinge pair wearability in the system is easily covered to the short slab effect. The existing equipment and the existing experimental method are not suitable for the wear resistance test of the designated hinge pair of the chain, and the whole wear resistance of the chain cannot be more accurately verified because the independence research cannot be carried out on the designated hinge pair.
Disclosure of Invention
The invention provides a chain hinge pair wear resistance test device and method, which can eliminate irrelevant interference, realize a wear resistance test of a chain appointed hinge pair, ensure accurate and controllable test parameters and realize quantitative analysis of the wear resistance of the chain hinge pair.
In order to realize the purpose, the technical scheme of the invention is as follows:
a chain hinge pair wear-resistance test device comprises a component A and a component B, and the test device comprises a workbench, a square mounting frame fixedly arranged on the upper surface of the workbench, a loading unit and a swing shaft unit;
the swing shaft unit comprises bearings symmetrically arranged on two side walls of the mounting frame, hollow step shafts with two ends in interference fit with inner rings of the bearings, the outer diameter of the middle section of each hollow step shaft is larger than that of the sections at the two ends, abdicating grooves penetrating through the inside and the outside of each hollow step shaft are respectively arranged at the upper part and the lower part of the middle section, one end of each hollow step shaft extends outwards and is in transmission connection with a driving mechanism through a crank rocker device, and the hollow step shafts perform swing motion under the driving of the driving mechanism;
the loading unit comprises a loading sleeve fixedly connected to the upper surface of the top end of the mounting frame, a rotating cap arranged above the loading sleeve and a pressurizing rod arranged in the loading sleeve, the upper end and the lower end of the loading sleeve are open, the lower end of the loading sleeve penetrates through the top of the mounting frame to enter the mounting frame, the longitudinal section of the pressurizing rod is of a convex structure, the bottom end of the pressurizing rod is fixedly connected with the mounting plate, the surface of the inner side wall of the rotating cap is in threaded connection with the outer surface of the loading sleeve, the upper end of the convex structure can slidably penetrate through the top wall of the rotating cap and extend upwards, and a loading spring is sleeved on the periphery of the upper section of the convex structure and positioned between the upper surface of the lower section of the convex structure and the lower surface of the top wall of the rotating cap;
the lateral wall fixed surface of mounting panel install the first fixed subassembly that is used for fixed part A, the centre bore of hollow step axle in be equipped with the fixed subassembly of second that is used for fixed part B, first fixed subassembly when cooperating with the fixed subassembly of second, part A and part B constitute the chain hinge pair, apply the frictional force between part A and the part B through rotatory commentaries on classics cap, the rocking motion through hollow step axle drives part A and part B simulation motion friction, pressure, actuating mechanism's movement frequency and duration through the loading spring and the vice wear resistance of part A and part B's wearing and tearing volume quantitative analysis hinge.
Preferably, the driving mechanism is a motor fixedly arranged on the upper surface of the workbench, an output shaft of the motor is fixedly connected with an adjusting disc, the outer surface of the adjusting disc is provided with a T-shaped groove, two ends of the T-shaped groove penetrate through the side wall surface of the adjusting disc, the width of a groove body of the T-shaped groove facing to one side of the motor 1 is larger than that of a groove body away from one side of the motor, a T-shaped nut is connected in the T-shaped groove in a sliding mode, 3 threaded holes penetrating through the upper end face and the lower end face are uniformly distributed in the T-shaped nut, the inner diameter of the threaded hole in the middle is larger than that of the threaded holes on the two sides, positioning bolts are arranged in the threaded holes on the two sides, and the T-shaped nut and the T-shaped groove are locked through the positioning bolts; the central line of the T-shaped groove is intersected with the axis of the adjusting disc;
the crank rocker device comprises a connecting rod, fisheye joints and swing blocks, wherein the fisheye joints and the swing blocks are fixedly arranged at two ends of the connecting rod, a driving shaft is screwed in a threaded hole in the middle of a T-shaped nut, the axis of the driving shaft is separated from the axis of an adjusting plate, the end part of the driving shaft is connected with the corresponding fisheye joint, the other fisheye joint is connected with the swing block through a hinged shaft arranged at the top end of the swing block, the swing block is of a convex structure, and the lower part of the swing block is provided with a mounting hole penetrating through the front end face and the rear end face and is fixedly connected with one end, extending outwards from the hollow step shaft, of the mounting hole.
Preferably, the component A is a sleeve, the component B is a pin shaft, the first fixing assembly is a sleeve fixing block, a round hole penetrating through the left end face and the right end face is formed in the lower portion of the sleeve fixing block, the sleeve is in clearance fit with the round hole, a jackscrew hole penetrating through the round hole is further formed in the bottom end of the side wall of the round hole, a positioning screw is screwed in the jackscrew hole, and the sleeve is fixed through the positioning screw; the second fixing assembly is 2 pin shaft clamping sleeves, the pin shaft is clamped between opposite ends of the 2 pin shaft clamping sleeves, the pin shaft clamping sleeves are of a tubular structure, the outer surface of the tubular structure is in clearance fit with the inner surface of a central hole of the hollow stepped shaft, a strip-shaped groove along the axial direction of the pin shaft clamping sleeves is formed in the side wall of the tubular structure, a first guiding and positioning mechanism which is matched with the inner surface of the central hole of the hollow stepped shaft and the outer surface of the pin shaft clamping sleeves is arranged on the inner surface of the central hole of the hollow stepped shaft, the first guiding and positioning mechanism is used for limiting the pin shaft clamping sleeves to move left and right along the axial direction of the central hole of the hollow stepped shaft, openings of the strip-shaped groove face to the rear side, a first positioning threaded hole is further formed in the rear side wall of the hollow stepped shaft, a locking bolt is screwed in the first positioning threaded hole, the upper surface of the lower end wall of the strip-shaped groove is of a rack structure, a gear is arranged at the end of the locking bolt, and the gear is in meshed connection with the rack structure.
Preferably, the lower section of the convex structure of the pressurizing rod is connected with the inner surface of the loading sleeve through a second guiding and positioning mechanism, the second guiding and positioning mechanism comprises a guide groove longitudinally penetrating through the upper end face and the lower end face of the lower section of the convex structure and a guide key longitudinally arranged on the inner surface of the loading sleeve, and the guide key is slidably connected with the guide groove and limits the pressurizing rod to move only in the vertical direction.
Preferably, the rear wall of the loading sleeve opposite to the bottom end of the pressurizing rod is further provided with a second positioning threaded hole penetrating through the inside and the outside of the loading sleeve, a limit bolt is screwed in the second positioning threaded hole, and the inner side end of the limit bolt is matched with the bottom end of the pressurizing rod and used for limiting the maximum downward stroke of the pressurizing rod.
Preferably, the upper part of the outer surface of the upper section of the convex structure of the pressurizing rod is also provided with scale marks for marking the expansion and contraction amount of the loading spring.
Preferably, the adjusting disc is provided with nut adjusting plates on the side wall surfaces at the two ends of the T-shaped groove, the nut adjusting plates are fixedly connected with the adjusting disc through bolts, the nut adjusting plates are provided with adjusting bolts extending into the T-shaped groove, and the end parts of the adjusting bolts are abutted to the end parts of the T-shaped nuts.
Preferably, the middle part of the outer surface of the loading sleeve is provided with a flange plate, and the loading sleeve is fixedly connected with the upper surface of the top end of the mounting frame through the flange plate.
Preferably, the outer surface of the rotating cap is uniformly distributed with a plurality of blind holes for connecting the rotating handle around the axis.
A chain hinge pair wear resistance test method comprises the following steps:
(1) Mounting the component A on the first fixing assembly, and fixing the first fixing assembly on the mounting plate; one end of the component B is arranged in one of the second fixing assemblies, and the positions of the 2 second fixing assemblies in the central hole of the hollow step shaft are adjusted to reserve a space for the first fixing assembly to insert;
(2) Inserting the pressurizing rod into the loading sleeve through a second guiding and positioning mechanism; adjusting the position of the pressurizing rod to enable the component A to be opposite to the component B, rotating the locking bolt to enable the 2 first fixing assemblies to move oppositely, enabling the component A and the component B to be mutually matched to form a chain hinge pair, and fixing the other end of the component B through an opposite second fixing assembly;
(3) Screwing the limiting bolt in the second positioning threaded hole, installing a loading spring with a corresponding model and screwing the loading spring into the rotating cap;
(4) Adjusting the position of the T-shaped nut on the adjusting disc to set the swing amplitude of the component B, and turning on the motor to perform operation test;
(5) Rotating the rotating cap to compress the loading spring, and loading the pressure between the component A and the component B according to the indication of the scale marks;
(6) Setting the rotating speed and the duration time of the motor as test parameters, and carrying out a wear-resistant test under the parameters;
(7) And quantitatively analyzing the wear-resisting property of the hinge pair according to the pressure of the loading spring, the rotating speed and the duration of the motor and the wear loss of the component A and the component B.
The chain hinge pair wear resistance test device and method provided by the invention have the following beneficial effects:
1. the wear-resisting test of the single kinematic pair is redesigned as the direction, so that independent variables and additional interference are reduced, and the wear-resisting performance independent test of the chain-appointed hinge pair is realized.
2. Through changing the anchor clamps, realize the vice wear resistance detection test of different models of chain, different kind hinge on same equipment. The concrete types comprise pin shaft-sleeve, sleeve-roller, toothed chain plate-pin shaft and the like.
3. The wear-resisting property of the chain hinge pair to be tested can be quantitatively analyzed, and all relevant parameters to be tested are accurate and controllable. The controllable parameters include: the test duration, the contact area and the region of the test part, the relative motion speed, the relative motion angle, the reciprocating motion times, the loading force and the like.
4. The equipment structure is reliable, compact and small. The occupied area is smaller, the reliability is improved, the running time is longer, and the speed selectable range is larger.
Drawings
FIG. 1: the invention is a schematic three-dimensional structure;
FIG. 2 is a schematic diagram: the internal structure of the invention is sectioned;
FIG. 3: a plan view of the crank and rocker mechanism of the present invention;
FIG. 4 is a schematic view of: the invention is a schematic diagram of a safety limiting hole;
FIG. 5: the invention discloses a side sectional view of a sleeve fixing block;
FIG. 6: the invention discloses a structural schematic diagram of a pin shaft clamping sleeve;
01: fastening screw hole, 02: round hole, 03: sleeve, 04: set screw, 05: round pin axle clamping sleeve, 06: pin shaft, 07: fastening screw hole, 08: fastening bolt, 09: go up arm lock, 010: lower arm lock, 011: stopper, 1: motor, 2: adjustment dial, 3: nut adjusting plate, 4: "T" nut, 5: fisheye joint, 6: drive shaft, 7: connecting rod, 8: a swing block, 9: hollow step shaft, 10: bearing seat, 11: bearing, 12: loading sleeve, 13: turning cap, 14: pressure lever, 15: spring-loaded, 16: second fixing member, 17: first fixing member, 18: locking bolt, 19: spacing bolt, 20: mounting frame, 21: table, 22: groove of stepping down, 23: mounting plate, 24: fastening screw, 25: guide key, 26: guide groove, 27: strip groove, 28: a rack structure.
Detailed Description
In the following, embodiments of the present invention are described in detail in a stepwise manner, which is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
The invention can realize the wear-resisting tests of hinge pairs with different types and types of chains by replacing the clamp. For convenience of description, the specific embodiment takes a sleeve-pin shaft hinge pair as an example, and the corresponding clamps are uniformly replaced by a sleeve clamping block and a pin shaft clamping sleeve; parts are uniformly replaced by sleeves and pin shafts, but the parts cannot be used as the limitation of the scheme, and the types of the specific hinge pairs can refer to the beneficial effect part of the invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are only used for describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation and a specific orientation configuration and operation, and thus, the present invention is not to be construed as being limited thereto.
In one embodiment, the invention relates to a chain hinge pair wear test device, as shown in fig. 1 to 4:
the hinge pair comprises a component A and a component B, and the test device comprises a workbench 21, a square mounting rack 20 fixedly arranged on the upper surface of the workbench 21, a loading unit and a swing shaft unit;
the swing shaft unit comprises bearings 11 symmetrically arranged on two side walls of the mounting frame 20, a hollow step shaft 9 with two ends in interference fit with inner rings of the bearings 11, the outer diameter of the middle section of the hollow step shaft 9 is larger than that of sections at two ends, abdicating grooves 22 penetrating through the inside and the outside of the hollow step shaft 9 are respectively arranged at the upper part and the lower part of the middle section, one end of the hollow step shaft 9 extends outwards and is in transmission connection with a driving mechanism through a crank rocker device, and the hollow step shaft 9 does swinging motion under the driving of the driving mechanism;
the loading unit comprises a loading sleeve 12 fixedly connected to the upper surface of the top end of the mounting frame 20, a rotating cap 13 arranged above the loading sleeve, and a pressurizing rod 14 arranged in the loading sleeve 12, wherein the upper end and the lower end of the loading sleeve 12 are open, the lower end of the loading sleeve 12 penetrates through the top of the mounting frame 20 to enter the mounting frame 20, the longitudinal section of the pressurizing rod 14 is of a convex structure, the bottom end of the pressurizing rod 14 is also fixedly connected with a mounting plate 23, the surface of the inner side wall of the rotating cap 13 is in threaded connection with the outer surface of the loading sleeve 12, the upper end of the convex structure can slidably penetrate through the top wall of the rotating cap 13 and extend upwards, and a loading spring 15 is sleeved between the upper surface of the lower section of the convex structure and the lower surface of the top wall of the rotating cap 13 at the periphery of the upper section of the convex structure;
the lateral wall fixed surface of mounting panel 23 install the first fixed subassembly 17 that is used for fixed part A, the centre bore of hollow step axle 9 in be equipped with the fixed subassembly 16 of second that is used for fixed part B, first fixed subassembly 17 and the fixed subassembly 16 of second when matching, part A and part B constitute the chain hinge pair, through rotatory cap 13 application part A and the frictional force between the part B, the rocking motion through hollow step axle 9 drives part A and part B simulation motion friction, pressure through loading spring 15, actuating mechanism's frequency of motion and duration and the vice wear resistance of the wearing and tearing volume quantitative analysis hinge of part A and part B.
In the present embodiment, the hinge pair constituted by the component a and the component B includes: the "pin shaft-sleeve", "sleeve-roller", "toothed chain plate-pin shaft", wherein the first fixing component 17, i.e. the sleeve fixing block, for fixing the sleeve 03 is shown in fig. 5; a second fixing component 16, namely a pin shaft clamping sleeve 05, for clamping the pin shaft 06 is shown in fig. 6, when in use, the two ends of the pin shaft are clamped by an upper clamping arm 09 and a lower clamping arm 010, and meanwhile, the pin shaft clamping sleeve 05 is pushed to move by a gear through rotating a locking bolt 18, and the two ends of the pin shaft are squeezed tightly by limiting blocks 011 at the two sides; by analogy, the structure of the sleeve fixing block can also be used for fixing the roller, and the pin shaft clamping sleeve can also be used for clamping the sleeve through size adjustment, so that a 'sleeve-roller' hinge pair is constructed; similarly, the size of the sleeve fixing block is adjusted to enable the chain plate hole of the tooth-shaped chain plate to be opposite to the round hole, and then the pin shaft is fixed through the pin shaft clamping sleeve, so that the tooth-shaped chain plate-pin shaft hinge pair can be realized.
In a further embodiment, as shown in fig. 1-4, the driving mechanism is a motor 1 fixedly arranged on the upper surface of the worktable 21, an output shaft of the motor 1 is fixedly connected with an adjusting disc 2, the outer surface of the adjusting disc is provided with a T-shaped groove (not shown in the figure) with two ends penetrating through the side wall surface of the adjusting disc, the width of the groove body of the T-shaped groove facing to one side of the motor 1 is larger than that of the groove body far away from one side of the motor, a T-shaped nut 4 is connected in the T-shaped groove in a sliding manner, 3 threaded holes penetrating through the upper end surface and the lower end surface are uniformly distributed on the T-shaped nut 4, the inner diameter of the threaded hole in the middle is larger than that of the threaded holes at two sides, positioning bolts (not shown in the figure) are arranged in the threaded holes at two sides, and the T-shaped nut and the T-shaped groove are locked by the positioning bolts; the central line of the T-shaped groove is intersected with the axis of the adjusting disc;
the crank rocker device comprises a connecting rod 7, fisheye joints 5 fixedly arranged at two ends of the connecting rod 7 and a swing block 8, wherein a driving shaft 6 is screwed in a threaded hole in the middle of a T-shaped nut 4, the axis of the driving shaft 6 is separated from the axis of the adjusting plate 2, the end part of the driving shaft 6 is connected with the corresponding fisheye joint 5, the other fisheye joint 5 is connected with the top end of the swing block 8 through a hinged shaft arranged at the top end of the swing block, the swing block 8 is of a convex structure, and the lower part of the swing block 8 is provided with a mounting hole penetrating through the front end face and the rear end face and fixedly connected with one end, extending outwards, of the hollow step shaft through the mounting hole.
In this embodiment, the motor 1 drives the hollow step shaft 9 to swing repeatedly by the crank rocker device, thereby achieving the effect of simulating the friction of the chain hinge pair. The T-shaped nut 4 can be adjusted in position in the T-shaped groove to adjust the swing amplitude of the component B, and the rotation speed of the motor determines the swing frequency of the component B.
In a further embodiment, as shown in fig. 2, 4 and 5, the component a is a sleeve, the component B is a pin, the first fixing assembly 17 is a sleeve fixing block, the lower part of the sleeve fixing block is provided with a circular hole penetrating through the left and right end faces, the sleeve 03 is in clearance fit with the circular hole 02, the bottom end of the side wall of the circular hole is further provided with a jackscrew hole (not marked in the figure) penetrating through the inside and outside of the circular hole, and the jackscrew hole is threaded with a positioning screw 04 and fixes the sleeve by the positioning screw; the second fixing component 16 is 2 pin shaft clamping sleeves, the pin shaft is clamped between opposite ends of the 2 pin shaft clamping sleeves, the pin shaft clamping sleeves are tubular structures, the outer surfaces of the tubular structures are in clearance fit with the inner surfaces of the center holes of the hollow stepped shafts, strip-shaped grooves 27 along the axial direction of the pin shaft clamping sleeves 05 are formed in the side walls of the tubular structures, the inner surfaces of the center holes of the hollow stepped shafts are clamped with the pin shaft, first guiding and positioning mechanisms (the structures of the first guiding and positioning mechanisms refer to the following second guiding and positioning mechanisms) which are matched with each other are arranged on the outer surfaces of the tubular structures, the first guiding and positioning mechanisms are used for limiting the pin shaft clamping sleeves to move left and right along the axial direction of the center holes of the hollow stepped shafts, openings of the strip-shaped grooves face the rear sides, first positioning threaded holes are further formed in the rear side walls of the hollow stepped shafts, locking bolts 18 are screwed in the first positioning threaded holes, the upper surfaces of the groove walls of the lower ends of the strip-shaped grooves 27 are rack structures 28, the end portions of the locking bolts 18 are provided with gear wheels which are in meshed connection with the rack structures 28.
In this embodiment, through rotatory locking bolt 18, the distance between 2 round pin axle clamping sleeves 05 can be adjusted, thereby install the round pin axle between 2 round pin axle clamping sleeves through the groove of stepping down 22 of hollow step axle bottom, and insert the round pin axle in the sleeve in the groove of stepping down 22 male sleeve fixed block along upper portion, thereby make round pin axle and sleeve constitute the chain hinge pair, rethread rotatory locking bolt 18, can press from both sides the round pin axle of centre gripping tightly, thereby avoid the relative rotation between round pin axle and the hollow step axle. Furthermore, the friction force between the pin shaft and the sleeve can be adjusted by adjusting the height of the pressurizing rod.
In a further embodiment, as shown in fig. 2, the lower section of the "convex" structure of the pressing rod 14 is connected with the inner surface of the loading sleeve 12 through a second guiding and positioning mechanism, the second guiding and positioning mechanism comprises a guiding groove 26 longitudinally penetrating through the upper and lower end surfaces of the lower section of the "convex" structure, and a guiding key 25 longitudinally arranged on the inner surface of the loading sleeve 12, the guiding key 25 is slidably connected with the guiding groove 26 and limits the pressing rod 14 to move only in the up-down direction.
In this embodiment, the pressurizing rod 14 moves up and down, so as to adjust the position of the sleeve fixing block, so that the open end of the sleeve is opposite to the pin shaft, and the pin shaft can be fed into the sleeve by rotating the locking bolt 18, thereby forming a chain hinge pair; similarly, as described above, after the hinge pair is formed, the loading spring 15 is installed, and the rotating cap 13 is rotated, so that friction force is generated between the contact surfaces of the sleeve and the pin shaft.
In a further embodiment, as shown in fig. 2 and 4, the rear wall of the loading sleeve 12 opposite to the bottom end of the pressure rod 14 is further provided with a second positioning threaded hole penetrating through the loading sleeve, a limiting bolt 19 is screwed in the second positioning threaded hole, and the inner end of the limiting bolt is matched with the bottom end of the pressure rod 14 and used for limiting the maximum downward stroke of the pressure rod 14.
In this embodiment, the limit bolt 19 can prevent the hollow step shaft from being blocked in swinging or the hinge pair part from being damaged due to the fact that the pressurizing rod moves downwards too much.
In a further embodiment, as shown in fig. 1-4, the upper part of the outer surface of the upper section of the "convex" structure of the pressure rod 14 is further provided with a scale mark for marking the expansion and contraction amount of the loading spring 5.
In this embodiment, when the pressure lever 14 is at the set working height and constitutes a chain hinge pair, the loading spring 15 is installed, the rotating cap 13 is rotated, and the contraction amount of the loading spring 15 can be obtained according to the scale of the downward movement of the rotating cap 13, so that the pressure of the contact surface of the sleeve and the pin shaft can be calculated.
In a further embodiment, as shown in fig. 1 to 4, the side wall surfaces of the adjusting disk 2 at both ends of the T-shaped groove are further provided with nut adjusting plates 3, the nut adjusting plates 3 are fixedly connected with the adjusting disk through bolts, and the nut adjusting plates 3 are further provided with adjusting bolts extending into the T-shaped groove, and the end portions of the adjusting bolts abut against the end portions of the T-shaped nuts.
In this embodiment, the T-shaped nut 4 can be further fixed by the nut adjusting plate to prevent loosening in the test process, and the T-shaped groove can be adapted to T-shaped nuts 4 of different models.
In a further embodiment, as shown in fig. 1-4, a flange is provided at the middle of the outer surface of the loading sleeve 14, and the loading sleeve is fixedly connected with the upper surface of the top end of the mounting frame through the flange.
In a further embodiment, as shown in fig. 1, 3 and 4, the outer surface of the rotating cap 13 is further provided with a plurality of blind holes uniformly distributed around the axis for connecting the rotating handle. After the handle is inserted, the rotating cap is convenient to rotate.
In a further embodiment, as shown in FIGS. 1-4:
a chain hinge pair wear resistance test method comprises the following steps:
(1) Mounting the component a on the first fixing unit 17, and fixing the first fixing unit 17 on the mounting plate 23; one end of the component B is arranged in one of the second fixing assemblies, and the positions of the 2 second fixing assemblies in the central hole of the hollow step shaft are adjusted to reserve a space for the first fixing assembly to insert;
(2) Inserting the pressurizing rod 14 into the loading sleeve 12 through a second guiding and positioning mechanism; adjusting the position of the pressure rod 14 to enable the component A to be opposite to the component B, rotating the locking bolt 18 to enable the 2 first fixing assemblies 16 to move oppositely, enabling the component A and the component B to be matched with each other to form a chain hinge pair, and fixing the other end of the component B through an opposite second fixing assembly;
(3) Screwing the limiting bolt 19 in the second positioning threaded hole, installing a loading spring 15 with a corresponding model and screwing the loading spring into the rotating cap 13;
(4) Adjusting the position of a T-shaped nut on the adjusting disc to set the swing amplitude of the component B, and starting a motor to perform operation test;
(5) Rotating the rotating cap to compress the loading spring, and loading the pressure between the component A and the component B according to the indication of the scale marks;
(6) Setting the rotating speed and the duration time of the motor as test parameters, and carrying out a wear-resistant test under the parameters;
(7) And quantitatively analyzing the wear-resisting property of the hinge pair according to the pressure of the loading spring 15, the rotating speed and the duration of the motor and the wear amount of the component A and the component B.
The embodiment discloses a method for performing a wear resistance test on a chain hinge pair by using the device of the invention, which is completely different from the traditional chain wear resistance test method, the traditional method is to load the whole chain onto equipment for testing, and in the test process, the whole chain is judged to be unqualified in wear resistance possibly due to disqualification of individual hinge pair, on one hand, related personnel can not know the wear resistance of the chain exactly, misleading is generated, and the misleading is mistaken that the whole wear resistance of the chain is weak; on the other hand, the occurrence of misleading also causes the chain to be determined as a defective product, thereby causing waste of production data.
When the chain wear resistance testing device is used, wear resistance tests can be performed on each hinge pair aiming at a selected chain sample, and the hinge pair in which the chain wear resistance problem occurs can be accurately known through the tests, so that defective parts are really found out, and the root cause of the product quality problem is found according to the defective parts, so that the quality of products can be really improved through the test detection of the chain wear resistance testing device, and the waste of materials is avoided.
Claims (9)
1. A chain hinge pair wear resistance test device is characterized in that: the hinge pair comprises a component A and a component B, and the test device comprises a workbench, a square mounting rack fixedly arranged on the upper surface of the workbench, a loading unit and a swing shaft unit;
the swing shaft unit comprises bearings symmetrically arranged on two side walls of the mounting frame, hollow step shafts with two ends in interference fit with inner rings of the bearings, the outer diameter of the middle section of each hollow step shaft is larger than that of the sections at the two ends, abdicating grooves penetrating through the inside and the outside of each hollow step shaft are respectively arranged at the upper part and the lower part of the middle section, one end of each hollow step shaft extends outwards and is in transmission connection with a driving mechanism through a crank rocker device, and the hollow step shafts perform swing motion under the driving of the driving mechanism;
the loading unit comprises a loading sleeve fixedly connected to the upper surface of the top end of the mounting frame, a rotating cap arranged above the loading sleeve and a pressurizing rod arranged in the loading sleeve, the upper end and the lower end of the loading sleeve are open, the lower end of the loading sleeve penetrates through the top of the mounting frame to enter the mounting frame, the longitudinal section of the pressurizing rod is of a convex structure, the bottom end of the pressurizing rod is fixedly connected with the mounting plate, the surface of the inner side wall of the rotating cap is in threaded connection with the outer surface of the loading sleeve, the upper end of the convex structure can slidably penetrate through the top wall of the rotating cap and extend upwards, and a loading spring is sleeved on the periphery of the upper section of the convex structure and positioned between the upper surface of the lower section of the convex structure and the lower surface of the top wall of the rotating cap;
the surface of the side wall of the mounting plate is fixedly provided with a first fixing assembly for fixing a component A, a second fixing assembly for fixing a component B is arranged in a central hole of the hollow step shaft, when the first fixing assembly is matched with the second fixing assembly, the component A and the component B form a chain hinge pair, friction force between the component A and the component B is exerted through a rotating cap, the component A and the component B are driven to simulate motion friction through the swinging motion of the hollow step shaft, and the wear resistance of the hinge pair is quantitatively analyzed through the pressure of a loading spring, the motion frequency and duration of a driving mechanism and the wear loss of the component A and the component B;
the part A is a sleeve, the part B is a pin shaft, the first fixing assembly is a sleeve fixing block, the lower part of the sleeve fixing block is provided with a round hole penetrating through the left end surface and the right end surface, the sleeve is in clearance fit in the round hole, the bottom end of the side wall of the round hole is also provided with a jackscrew hole penetrating through the inside and the outside of the round hole, a positioning screw is screwed in the jackscrew hole, and the sleeve is fixed through the positioning screw; the second fixing assembly is 2 pin shaft clamping sleeves, the pin shaft is clamped between opposite ends of the 2 pin shaft clamping sleeves, the pin shaft clamping sleeves are of a tubular structure, the outer surface of the tubular structure is in clearance fit with the inner surface of a central hole of the hollow stepped shaft, a strip-shaped groove along the axial direction of the pin shaft clamping sleeves is formed in the side wall of the tubular structure, a first guiding and positioning mechanism which is matched with the inner surface of the central hole of the hollow stepped shaft and the outer surface of the pin shaft clamping sleeves is arranged on the inner surface of the central hole of the hollow stepped shaft, the first guiding and positioning mechanism is used for limiting the pin shaft clamping sleeves to move left and right along the axial direction of the central hole of the hollow stepped shaft, openings of the strip-shaped groove face to the rear side, a first positioning threaded hole is further formed in the rear side wall of the hollow stepped shaft, a locking bolt is screwed in the first positioning threaded hole, the upper surface of the lower end wall of the strip-shaped groove is of a rack structure, a gear is arranged at the end of the locking bolt, and the gear is in meshed connection with the rack structure.
2. The wear test device for the chain hinge pair as claimed in claim 1, wherein: the driving mechanism is a motor fixedly arranged on the upper surface of the workbench, an output shaft of the motor is fixedly connected with an adjusting disc, the outer surface of the adjusting disc is provided with a T-shaped groove, two ends of the T-shaped groove penetrate through the side wall surface of the adjusting disc, the width of a groove body of the T-shaped groove facing one side of the motor 1 is larger than that of a groove body away from one side of the motor, a T-shaped nut is connected in the T-shaped groove in a sliding mode, 3 threaded holes penetrating through the upper end face and the lower end face are uniformly distributed in the T-shaped nut, the inner diameter of the threaded hole in the middle is larger than that of the threaded holes on two sides, positioning bolts are arranged in the threaded holes on two sides, and the T-shaped nut and the T-shaped groove are locked through the positioning bolts; the central line of the T-shaped groove is intersected with the axis of the adjusting disc;
the crank rocker device comprises a connecting rod, fisheye joints and swing blocks, wherein the fisheye joints and the swing blocks are fixedly arranged at two ends of the connecting rod, a driving shaft is screwed in a threaded hole in the middle of a T-shaped nut, the axis of the driving shaft is separated from the axis of an adjusting plate, the end part of the driving shaft is connected with the corresponding fisheye joint, the other fisheye joint is connected with the swing block through a hinged shaft arranged at the top end of the swing block, the swing block is of a convex structure, and the lower part of the swing block is provided with a mounting hole penetrating through the front end face and the rear end face and is fixedly connected with one end, extending outwards from the hollow step shaft, of the mounting hole.
3. The wear test device for the chain hinge pair as claimed in claim 1, wherein: the lower section of the convex structure of the pressurizing rod is connected with the inner surface of the loading sleeve through a second guiding and positioning mechanism, the second guiding and positioning mechanism comprises a guide groove longitudinally penetrating through the upper end face and the lower end face of the lower section of the convex structure and a guide key longitudinally arranged on the inner surface of the loading sleeve, and the guide key is slidably connected with the guide groove and limits that the pressurizing rod can only move in the up-and-down direction.
4. A chain hinge pair wear test device as claimed in claim 3, wherein: the rear wall of the loading sleeve opposite to the bottom end of the pressurizing rod is also provided with a second positioning threaded hole penetrating through the inside and the outside of the loading sleeve, a limiting bolt is screwed in the second positioning threaded hole, and the inner side end of the limiting bolt is matched with the bottom end of the pressurizing rod and used for limiting the maximum downward stroke of the pressurizing rod.
5. The wear test device of claim 4, wherein: the upper part of the outer surface of the upper section of the convex structure of the pressurizing rod is also provided with scale marks for marking the expansion amount of the loading spring.
6. The wear test device of claim 5, wherein: the adjusting plate is located the lateral wall surface at "T" shape groove both ends and still is equipped with the nut adjusting plate respectively, the nut adjusting plate pass through bolt and adjusting plate fixed connection, and still be equipped with the adjusting bolt who extends into "T" shape inslot on the nut adjusting plate, adjusting bolt's tip and the tip of "T" shape nut offset.
7. The wear test device of claim 6, wherein: the middle part of the outer surface of the loading sleeve is provided with a flange plate, and the loading sleeve is fixedly connected with the upper surface of the top end of the mounting frame through the flange plate.
8. The wear test device of claim 7, wherein: the outer surface of the rotating cap is also uniformly distributed with a plurality of blind holes used for connecting a rotating handle around the axis.
9. A wear-resisting test method for a chain hinge pair is characterized by comprising the following steps: the chain hinge pair wear resistance test device adopting the claim 8 comprises the following steps:
(1) Mounting the component A on the first fixing assembly, and fixing the first fixing assembly on the mounting plate; one end of the component B is arranged in one of the second fixing assemblies, and the positions of the 2 second fixing assemblies in the central hole of the hollow step shaft are adjusted to reserve a space for the first fixing assembly to insert;
(2) Inserting the pressurizing rod into the loading sleeve through the second guiding and positioning mechanism; adjusting the position of the pressurizing rod to enable the component A to be opposite to the component B, rotating the locking bolt to enable the 2 first fixing assemblies to move oppositely, enabling the component A and the component B to be mutually matched to form a chain hinge pair, and fixing the other end of the component B through an opposite second fixing assembly;
(3) Screwing the limiting bolt in the second positioning threaded hole, installing a loading spring with a corresponding model and screwing the loading spring into the rotating cap;
(4) Adjusting the position of a T-shaped nut on the adjusting disc to set the swing amplitude of the component B, and starting a motor to perform operation test;
(5) Rotating the rotating cap to compress the loading spring, and loading the pressure between the component A and the component B according to the indication of the scale marks;
(6) Setting the rotating speed and the duration time of the motor as test parameters, and carrying out a wear-resistant test under the parameters;
(7) And quantitatively analyzing the wear-resisting property of the hinge pair according to the pressure of the loading spring, the rotating speed and the duration of the motor and the wear loss of the component A and the component B.
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