CN220063334U - Automobile third-order gradual change stiffness leaf spring fatigue test device - Google Patents
Automobile third-order gradual change stiffness leaf spring fatigue test device Download PDFInfo
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- CN220063334U CN220063334U CN202321651968.1U CN202321651968U CN220063334U CN 220063334 U CN220063334 U CN 220063334U CN 202321651968 U CN202321651968 U CN 202321651968U CN 220063334 U CN220063334 U CN 220063334U
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- 230000007246 mechanism Effects 0.000 claims abstract description 56
- 238000012360 testing method Methods 0.000 claims abstract description 27
- 230000008878 coupling Effects 0.000 claims abstract description 12
- 238000010168 coupling process Methods 0.000 claims abstract description 12
- 238000005859 coupling reaction Methods 0.000 claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 75
- 239000010959 steel Substances 0.000 claims description 75
- 238000006073 displacement reaction Methods 0.000 claims description 4
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- 230000007547 defect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000819 phase cycle Methods 0.000 description 1
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- 230000000750 progressive effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract
The utility model provides a third-order gradual change rigidity leaf spring fatigue test device of car, includes longmen gallows assembly, second order auxiliary spring and ends and bump the mechanism, power unit, coupling mechanism and workstation, longmen gallows assembly is fixed in on the workstation, and the third-order gradual change rigidity leaf spring assembly is hung to the below, and second order auxiliary spring ends and bumps the mechanism and carry out spacingly to second order auxiliary spring, and power unit drives the up-and-down motion of third order gradual change rigidity leaf spring assembly, and power unit includes ejector pin and vertical direction antifriction cover assembly, motor assembly and flywheel crank link mechanism assembly. The utility model integrates the above structures to form the bench for simulating the real vehicle motion state of the whole plate spring, so that the durability test of the third-order gradual change rigidity plate spring can be realized, the durability test of the bench compatible with the second-order rigidity plate spring can be realized, the bench is suitable for the durability test of plate spring benches with different spans, and simultaneously, the plate spring associated parts can be integrally arranged on the bench to verify the durability of the bench, and the bench has the advantages of wide compatibility, high flexibility and high accuracy in simulating the whole plate spring vehicle motion.
Description
Technical Field
The utility model relates to the technical field of steel plate spring test detection, in particular to an automobile third-order gradual change stiffness steel plate spring fatigue test device.
Background
The leaf spring is one kind of elastic element widely used in automobile suspension, and is one elastic beam with similar strength and comprising several alloy spring sheets of equal width and different length. The three-stage gradual change stiffness steel plate spring is mainly applied to light and medium-sized trucks and mainly plays roles of bearing, guiding and transferring force, but due to the structural characteristics of the three-stage gradual change stiffness steel plate spring, when the three-stage gradual change stiffness steel plate spring is impacted by load, strong friction can be generated between steel plates, two friction surfaces can generate two motion friction forces in different directions, and a single sheet or a whole stack is broken after the three-stage gradual change stiffness steel plate spring reaches the fatigue limit, so that potential breaking risks are required to be exploded out through a relatively accurate plate spring rack endurance test before the road test, the durable risk of the plate spring road test can be avoided to a certain extent, road test resources and cost are saved, and the road test verification period is accelerated.
The utility model patent with publication number of CN207351662U provides a leaf spring fatigue test device, which can verify the loading arrangement and fatigue life of a suspension of a leaf spring and check the fatigue life of a connecting piece, but the technology has the following defects: 1. the leaf spring is not in the whole vehicle assembled state; 2. the back ear of the plate spring can not swing around the front ear, and the simulation state and the actual use have access; 3. the endurance test can not be carried out on the third-order gradual change stiffness steel plate spring, and the application range is not wide.
The utility model patent with publication number of CN113945346A also provides a leaf spring fatigue test device, can adjust the interval between two support cross shafts, change and support the cross shaft to and be applicable to the leaf spring of different specifications and test, simulate the actual service environment of leaf spring to a certain extent, but this technique still has following shortcoming: 1. the leaf spring is not in the whole vehicle assembled state; 2. the leaf spring only swings with the two ends and the center of the leaf spring is motionless, and the leaf spring can be in and out of the simulation state and the actual use; 3. the endurance test can not be carried out on the third-order gradual change stiffness steel plate spring, and the application range is not wide.
Disclosure of Invention
The utility model aims to provide a device for testing fatigue of a third-order gradual change stiffness steel plate spring of an automobile, which is used for simulating the actual automobile motion state of a plate spring, improving the test accuracy, integrally installing plate spring related parts (a front lug winding bush, a rear lug winding bush, a lifting lug bush, a buffer block and a second-order spring anti-collision block) on a rack, verifying the durability of the plate spring related parts together, saving the rack endurance period of each related part of the plate spring, and overcoming the defects in the prior art.
The technical scheme adopted by the utility model is as follows: the utility model provides an automobile third-order gradual change rigidity leaf spring fatigue test device, includes longmen gallows assembly, second order auxiliary spring and ends and bump the mechanism, power unit, coupling mechanism and workstation, longmen gallows assembly is fixed in on the workstation, and the lower hoist and mount third-order gradual change rigidity leaf spring assembly, second order auxiliary spring ends and bumps the mechanism and locate between longmen gallows assembly and the third-order gradual change rigidity leaf spring assembly, carries out spacingly to the second order auxiliary spring of third-order gradual change rigidity leaf spring assembly, power unit passes through coupling mechanism and drives the up-and-down motion of third-order gradual change rigidity leaf spring assembly, and power unit includes ejector pin and vertical direction antifriction cover assembly, motor assembly and flywheel crank link mechanism assembly belt are connected, and ejector pin and vertical direction antifriction cover assembly, coupling mechanism are connected gradually to flywheel crank link mechanism assembly upper end, and third-order gradual change rigidity leaf spring assembly are connected to coupling mechanism upper end.
The further technical scheme is as follows: the gantry crane assembly comprises a longitudinal beam assembly and a cross beam assembly, the longitudinal beam assembly comprises two longitudinal beam main bodies which are symmetrically arranged, the cross beam assembly comprises a cross beam main body, a front lifting lug support and a rear lifting lug support, the cross beam main body is arranged between the two longitudinal beam main bodies, two ends of the cross beam main body are fixed with the upper ends of the longitudinal beam main bodies through two fixed connection plates, the front lifting lug support and the rear lifting lug support are respectively and fixedly connected below the cross beam main body, two support connection plates are connected to two sides of the front lifting lug support, the lower ends of the support connection plates are connected with the front lifting lug ends of a third-order gradient stiffness steel plate spring assembly through bolts, a rear lifting lug sleeve is arranged in the rear lifting lug support, two ends of the rear lifting lug sleeve and two lifting lug side plates are connected in an external rotating mode, and the lower ends of the lifting lug side plates are connected with the rear lifting lug ends of the third-order gradient stiffness steel plate spring assembly through bolts in a rotating mode.
Further: the third-order gradual change rigidity leaf spring assembly comprises a third-order gradual change rigidity leaf spring, a rear axle buffer block, a lower clamping plate and a connecting seat plate, wherein the rear axle buffer block, the third-order gradual change rigidity leaf spring, the lower clamping plate and the connecting seat plate are sequentially arranged from top to bottom and are locked by two U-shaped bolts, the lower part of the connecting seat plate is connected with a connecting mechanism, the front coil lug end of the third-order gradual change rigidity leaf spring is connected with a support connecting plate, and the rear coil lug end is rotationally connected with a rear lifting lug sleeve and a lifting lug side plate through a rear lifting lug bushing.
Further: the flywheel crank connecting rod mechanism assembly comprises a flywheel, a crankshaft assembly, a bearing support seat and a connecting rod, wherein the flywheel is connected with a motor assembly belt, an output shaft of the flywheel is connected with a near-end crank block of the crankshaft assembly, the crankshaft assembly is fixed with the ground through the bearing support seat, an eccentric rod at a crank position of the crankshaft assembly is connected with a bearing at the lower end of the connecting rod, and the upper end of the connecting rod is connected with a push rod and a vertical guide antifriction sleeve assembly.
Further: the push rod and vertical guide antifriction sleeve assembly comprises a push rod and a vertical guide antifriction sleeve, the vertical guide antifriction sleeve is fixed on a workbench, the lower end of the push rod is connected with a connecting rod bearing, the upper end of the push rod passes through the vertical guide antifriction sleeve and then is in threaded connection with a base connecting plate, and the base connecting plate is connected with a connecting mechanism.
Further: the connecting mechanism comprises a base, a mandrel and an outer steel sleeve, wherein the lower part of the base is fixed with a base connecting plate, the mandrel is arranged on the base, two ends of the mandrel are fixedly connected with the base, a limiting groove is formed in the axial direction of the mandrel, the outer steel sleeve is sleeved outside the mandrel, a ball is arranged between the outer steel sleeve and the mandrel, the upper end of the outer steel sleeve is further connected with the third-order gradual change stiffness steel plate spring assembly through a lifting lug, and the third-order gradual change stiffness steel plate spring assembly can be driven to slide left and right along the mandrel.
Further: the second-order auxiliary spring anti-collision mechanism comprises a second-order auxiliary spring front anti-collision bracket, a second-order auxiliary spring front anti-collision block, a second-order auxiliary spring rear anti-collision bracket, a second-order auxiliary spring rear anti-collision block and a rear axle anti-collision bracket, wherein the second-order auxiliary spring front anti-collision bracket, the rear axle anti-collision bracket and the second-order auxiliary spring rear anti-collision bracket are fixed below a beam main body, the second-order auxiliary spring front anti-collision block is arranged below the second-order auxiliary spring front anti-collision bracket and corresponds to the second-order auxiliary spring front end of the third-order gradual-change stiffness steel plate spring assembly, the second-order auxiliary spring rear anti-collision block is arranged below the second-order auxiliary spring rear anti-collision bracket and corresponds to the second-order auxiliary spring rear end of the third-order gradual-change stiffness steel plate spring assembly, and the rear axle anti-collision bracket corresponds to the rear axle buffer block of the third-order gradual-change stiffness steel plate spring assembly.
Further: reinforcing plates are arranged on two sides of two longitudinal beam main bodies of the gantry crane assembly, and the lower part of the gantry crane assembly is fixedly arranged on a workbench through a bottom connecting plate.
Further: and a displacement sensor is arranged below the base connecting plate.
Further: and two ends of the outer steel sleeve are respectively provided with a blocking piece and a gasket.
By adopting the technical scheme, the fatigue test device for the three-stage gradual change stiffness steel plate spring of the automobile has the following beneficial effects:
1. the utility model relates to an automobile third-order gradual change stiffness steel plate spring fatigue test device, which integrates a gantry crane assembly, a second-order auxiliary spring anti-collision mechanism, a power mechanism and the like to form a rack for simulating the real automobile motion state of a whole plate spring, so that the test accuracy is improved, meanwhile, the device is compatible with various plate springs, not only can the endurance test of the third-order gradual change stiffness plate spring be realized, but also the endurance test of the rack of the second-order gradual change stiffness plate spring can be realized, the device is applicable to the endurance test of plate spring racks of different spans, and simultaneously, plate spring associated parts (a front lug bush, a rear lug bush, a buffer block and a second-order spring anti-collision block) can be integrally arranged on the rack to verify the durability together, the rack endurance period of each associated part of the plate spring is saved, the compatibility is wide, the flexibility is high, and the motion accuracy of the simulated plate spring is high;
2. according to the utility model, the motor assembly is adopted to drive the flywheel to rotate, the crankshaft assembly is adopted to drive the connecting rod to push the ejector rod to reciprocate in the vertical direction, the horizontal mandrel and the ball of the connecting mechanism realize the vertical movement of the ejector rod and the horizontal movement function of the plate spring assembly in a certain range under the condition of rotating around the front ear rolling point, so that the movement condition of the plate spring in a real vehicle state is finally simulated, the test is more in accordance with the actual movement condition of the plate spring, and the accuracy is higher;
3. the utility model has simple structure, can be improved by additionally arranging the gantry crane based on the conventional CEG fatigue tester, can be manufactured again, has low cost, is easy to realize, and has high market popularization value;
4. the utility model adopts the second-order auxiliary spring collision stopping mechanism, plays a limiting role on the plate spring assembly, simulates the upper limit of the plate spring assembly in the whole vehicle movement process, simultaneously prevents the fatigue life of the plate spring assembly from being reduced due to excessive deformation, and ensures the service life of the plate spring assembly in the design range.
The technical characteristics of the fatigue test device for the three-stage gradual change stiffness steel plate spring of the automobile are further described below with reference to the accompanying drawings and the embodiment.
Drawings
FIG. 1 is a schematic diagram of an overall structure of an automobile third-order gradient stiffness leaf spring fatigue test device according to an embodiment of the utility model;
FIG. 2 is a schematic view of a gantry hanger assembly according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of a three-stage progressive rate leaf spring assembly according to an embodiment of the present utility model;
FIG. 4 is a schematic diagram of a connection structure between a motor assembly and a flywheel crank-link mechanism assembly according to a first embodiment of the present utility model;
FIG. 5 is a schematic view of a connecting mechanism according to a first embodiment of the present utility model;
FIG. 6 is a schematic diagram of a second-order auxiliary spring anti-collision mechanism according to an embodiment of the present utility model.
In the figure:
1-gantry hanger assembly, 101-fixed connection plate, 102-rear lug sleeve, 103-rear lug bracket, 104-lug side plate, 105-reinforcing plate, 106-cross beam body, 107-front lug bracket, 108-bracket connection plate, 109-longitudinal beam body, 110-bottom connection plate, 2-second order auxiliary spring anti-collision mechanism, 201-second order auxiliary spring rear anti-collision block, 202-second order auxiliary spring rear anti-collision bracket, 203-rear axle anti-collision bracket, 204-second order auxiliary spring front anti-collision bracket, 205-second order auxiliary spring front anti-collision block, 3-third order gradual stiffness steel plate spring assembly, 301-U-shaped bolt, 302-rear axle buffer block, 303-rear lug bushing, 304-third order gradual stiffness steel plate spring, 305-lower clamp plate, 306-connecting seat plate, 4-connecting mechanism, 401-outer steel sleeve, 402-blocking plate, 403-base, 503-spacer, 405-mandrel, 406-ball, 5-ejector pin and vertical guide friction sleeve assembly, 501-vertical guide friction sleeve, 502-ejector pin, displacement sensor, 504-base, 6-connecting plate, 7-crank assembly, 7-crank bearing assembly, 702-bearing assembly, 8-bearing assembly.
Detailed Description
Example 1
The utility model provides an automobile third-order gradual change rigidity leaf spring fatigue test device, is used for simulating the motion state of the whole automobile of third-order gradual change rigidity leaf spring, test device includes gantry hanger assembly 1, second order auxiliary spring ends bumps mechanism 2, power unit, coupling mechanism 4 and workstation 8, gantry hanger assembly 1 is fixed in on the workstation 8, and the third-order gradual change rigidity leaf spring assembly 3 is hoisted to the below, second order auxiliary spring ends bumps mechanism 2 locates between gantry hanger assembly 1 and the third-order gradual change rigidity leaf spring assembly 3, carries out spacing to the second order auxiliary spring of third-order gradual change rigidity leaf spring assembly 3, power unit drives the third-order gradual change rigidity leaf spring assembly 3 through coupling mechanism 4 and reciprocates, and power unit includes ejector pin and perpendicular direction antifriction sleeve assembly 5, and motor assembly 6 and flywheel crank link mechanism assembly 7 belt coupling, and ejector pin and perpendicular direction antifriction sleeve assembly 5, coupling mechanism 4 are connected gradually to flywheel crank link mechanism assembly 7 upper end, and coupling mechanism 4 upper end connection third-order gradual change rigidity leaf spring assembly 3 can also realize that three-order gradual change rigidity leaf spring assembly 3 is high-phase-shifting, and the endurance plate spring can be simultaneously verified at the same time, the high-cycle-phase plate spring is compatible with the motion, and the endurance plate spring is also high in the endurance-phase-cycle-dependent, and is compatible to the test.
As shown in fig. 2, the gantry crane assembly 1 comprises a longitudinal beam assembly and a transverse beam assembly, the longitudinal beam assembly comprises two longitudinal beam main bodies 109 which are symmetrically arranged left and right, reinforcing plates 105 are welded on two sides of the longitudinal beam main bodies 109, two bottom connecting plates 110 are welded below the longitudinal beam main bodies, the bottom connecting plates 110 are fixedly connected with a workbench 8 through bolts and nuts, so that the two longitudinal beam main bodies 109 are fixed on the workbench 8, the transverse beam assembly comprises a transverse beam main body 106, a front ear bracket 107 and a rear ear bracket 103, the transverse beam main body 106 is arranged between the two longitudinal beam main bodies 109, two ends of the transverse beam main bodies are fixed with the upper ends of the longitudinal beam main bodies 109 through two fixed connecting plates 101, the front ear bracket 107 and the rear ear bracket 103 are welded on two ends of the lower end of the transverse beam main body 106 respectively, the front ear bracket connecting plates 107 are connected with the front ear ends of a third-stage gradient steel plate spring assembly 3 through bolts, the rear ear sleeve 102 is welded in the rear ear bracket 103, two ends of the rear sleeve 102 are rotationally connected with two side plates 104 through the rear ear bracket 103, and the lower ends of the lifting ears 104 are rotationally connected with the third-stage gradient steel plate spring assembly through the rear ear spring assembly.
As shown in fig. 3, the third-order gradient stiffness steel plate spring assembly 3 comprises a third-order gradient stiffness steel plate spring 304, a rear axle buffer block 302, a lower clamping plate 305 and a connecting seat plate 306, wherein the rear axle buffer block 302, the third-order gradient stiffness steel plate spring 304, the lower clamping plate 305 and the connecting seat plate 306 are sequentially arranged from top to bottom and are locked by two U-shaped bolts 301 and nuts, namely, the U-shaped bolts 301 are respectively sleeved outside the third-order gradient stiffness steel plate spring 304 and clamped, the upper end compresses the rear axle buffer block 302 and the third-order gradient stiffness steel plate spring 304, the lower end passes through the lower clamping plate 305 and the connecting seat plate 306 and then is matched and locked and fixed with the nuts, the lower part of the connecting seat plate 306 is connected with the connecting mechanism 4, the front rolling lug end of the third-order gradient stiffness steel plate spring 304 is connected with the bracket connecting plate 108 of the gantry crane assembly 1, the rear lug end is rotationally connected with the rear lug sleeve 102 and the lug side plate 104 through two rear lug bushings 303, one side lug side plate of the rear lug support 103 is a lug side plate welding assembly with two bolts welded up and down, the upper bolts simultaneously penetrate through the two rear lug bushings 303 and the rear lug sleeve 102 (the two rear lug bushings 303 are arranged in the rear lug sleeve 102), then penetrate through the other side lug side plate and are fastened by nuts, and the lower bolts sequentially penetrate through the rear lug end of the third-order gradient stiffness steel plate spring 304 and the other side lug side plate and are fastened by nuts, so that the rear lug end of the third-order gradient stiffness steel plate spring 304 is hoisted under the gantry crane assembly 1, the two lug side plates can rotate around the rear lug sleeve 102, and the rear lug end can move in a left-right arc manner, so that the plate spring movement more accords with the real vehicle movement condition.
As shown in fig. 4, the flywheel crank-link mechanism assembly 7 includes a flywheel 701, a crank shaft assembly 702, a bearing support 703 and a link 704, the flywheel 701 is connected with a motor assembly 6 by a belt, an output shaft of the flywheel 701 is connected with a proximal crank block of the crank shaft assembly 702, the crank shaft assembly 702 is fixed with the ground by the bearing support 703, an eccentric rod at a crank position of the crank shaft assembly is connected with a bearing at a lower end of the link 704, and an upper end of the link 704 is connected with a push rod and a vertical guide antifriction sleeve assembly 5.
As shown in fig. 4, the ejector rod and vertical guiding antifriction sleeve assembly 5 includes an ejector rod 502 and a vertical guiding antifriction sleeve 501, the vertical guiding antifriction sleeve 501 is vertically fixed on the workbench 8, the lower end of the ejector rod 502 is connected with a connecting rod 704 through a bearing, the upper end of the ejector rod passes through the vertical guiding antifriction sleeve 501 and is in threaded connection with a base connecting plate 504, the base connecting plate 504 is connected with the connecting mechanism 4, and a displacement sensor 503 is arranged below the base connecting plate.
As shown in fig. 5, the connection mechanism 4 includes a base 403, a mandrel 405 and an outer steel sleeve 401, the lower part of the base 403 is connected and fixed with a base connection plate 504 through a bolt and a nut, the mandrel 405 is disposed on the base 403, two ends of the mandrel are connected and fixed with the base 403, an axial direction of the mandrel is provided with a limit groove, the outer steel sleeve 401 is sleeved outside the mandrel 405, a ball 406 is disposed between the mandrel and the mandrel 405, the ball 406 is disposed in the limit groove, two ends of the outer steel sleeve 401 and two sides of the ball 406 are respectively provided with a blocking piece 402 and a gasket 404, the upper end of the outer steel sleeve 401 is also connected with a connection seat plate 306 of the third-order gradual stiffness steel plate spring assembly 3 through a lifting lug through a bolt and nut, and the third-order gradual stiffness steel plate spring assembly 3 can be driven to slide left and right along the mandrel 405.
The motor assembly 6 drives the flywheel 701 to rotate through a belt and drives the connecting rod 704 to push the ejector rod 502 to reciprocate back and forth in the vertical direction through the crank shaft assembly 702, and the mandrel 405 and the ball 406 of the connecting mechanism 4 can realize the vertical movement of the ejector rod 502 and the left and right movement of the outer steel sleeve 401, so that the third-order gradual-change stiffness steel plate spring assembly 3 performs up and down compression movement and performs point rotation movement around the front coiled lug, has the function of horizontally moving within a certain range, and finally completely simulates the movement condition of the third-order gradual-change stiffness steel plate spring assembly 3 in a real vehicle state.
As shown in fig. 6, the second-order auxiliary spring front-end collision stopping mechanism 2 includes a second-order auxiliary spring front-end collision stopping bracket 204, a second-order auxiliary spring front-end collision stopping block 205, a second-order auxiliary spring rear-end collision stopping bracket 202, a second-order auxiliary spring rear-end collision stopping block 201 and a rear axle collision stopping bracket 203, wherein the second-order auxiliary spring front-end collision stopping bracket 204, the rear axle collision stopping bracket 203 and the second-order auxiliary spring rear-end collision stopping bracket 202 are connected and fixed below the beam main body 106 through bolts and nuts, the second-order auxiliary spring front-end collision stopping block 205 is arranged below the second-order auxiliary spring front-end collision stopping bracket 204 and corresponds to the second-order auxiliary spring front end of the third-order gradual-stiffness steel plate spring assembly 3, the second-order auxiliary spring rear-end collision stopping block 201 is arranged below the second-order auxiliary spring rear-end collision stopping bracket 202 and corresponds to the second-end auxiliary spring rear end of the third-order gradual-stiffness steel plate spring assembly 3, and the rear axle collision stopping bracket 203 corresponds to the rear axle buffer block 302 of the third-order gradual-stiffness steel plate spring assembly 3.
The utility model can integrate a third-order gradual change stiffness steel plate spring assembly, a rear lifting lug bush, a lifting lug side plate welding assembly, a lifting lug side plate, a rear axle buffer block, a U-shaped bolt and a second-order auxiliary spring front and rear anti-collision block in a real vehicle on the device, then inputs the prepressing test stroke, amplitude and frequency of the plate spring at a computer control interface to control the movement of the plate spring, simulates the real vehicle plate spring assembly to rotate around a front lifting lug fixed point in a certain range, and the rear lifting lug and the lifting lug side plate of the plate spring can swing around the rear lifting lug bush axis along with the front lifting lug fixed point, thus simulating the rotation and translation characteristics of a plate spring center mounting point in a certain range and reflecting the real accuracy of the plate spring movement.
Example two
The third-order gradient stiffness steel plate spring fatigue test device for the automobile has the structure basically the same as that of the first embodiment, and is different in that: the testing device does not comprise a workbench, two longitudinal beam main bodies and the reinforcing plate of the gantry crane assembly are directly fixed with a ground base, and the vertical guide antifriction sleeve is fixed with the ground through a support bracket.
Example III
The third-order gradient stiffness steel plate spring fatigue test device for the automobile has the structure basically the same as that of the first embodiment, and is different in that: the test device does not comprise a connecting mechanism, and the upper ends of the ejector rod and the vertical guide antifriction sleeve assembly are connected with the third-order gradual change stiffness leaf spring assembly through a universal joint fork structure.
The above embodiments are merely preferred embodiments of the present utility model, the structure of the present utility model is not limited to the forms of the above embodiments, and any modifications, equivalents, etc. within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. The utility model provides a car third order gradual change rigidity leaf spring fatigue test device which characterized in that: the test device comprises a gantry hanging frame assembly (1), a second-order auxiliary spring collision stopping mechanism (2), a power mechanism, a connecting mechanism (4) and a workbench (8), wherein the gantry hanging frame assembly (1) is fixed on the workbench (8), a third-order gradual change stiffness steel plate spring assembly (3) is hoisted below, the second-order auxiliary spring collision stopping mechanism (2) is arranged between the gantry hanging frame assembly (1) and the third-order gradual change stiffness steel plate spring assembly (3), the second-order auxiliary spring of the third-order gradual change stiffness steel plate spring assembly (3) is limited, the power mechanism drives the third-order gradual change stiffness steel plate spring assembly (3) to move up and down through the connecting mechanism (4), the power mechanism comprises a push rod and a vertical guide antifriction sleeve assembly (5), a motor assembly (6) and a flywheel crank connecting rod mechanism assembly (7), the motor assembly (6) is connected with a flywheel crank connecting rod assembly (7) through a belt, the upper end of the flywheel connecting rod assembly (7) is sequentially connected with the push rod and the vertical guide antifriction assembly (5) and the connecting mechanism (4), and the upper end of the connecting mechanism (4) is connected with the third-order gradual change stiffness steel plate spring assembly (3).
2. The automobile third-order gradual change stiffness steel plate spring fatigue test device according to claim 1, wherein: the gantry crane assembly (1) comprises a longitudinal beam assembly and a cross beam assembly, the longitudinal beam assembly comprises two longitudinal beam main bodies (109) which are symmetrically arranged, the cross beam assembly comprises a cross beam main body (106), a front lifting lug support (107) and a rear lifting lug support (103), the cross beam main body (106) is arranged between the two longitudinal beam main bodies (109), two ends of the cross beam main body are fixedly connected with the upper ends of the longitudinal beam main bodies (109) through two fixed connecting plates (101), the front lifting lug support (107) and the rear lifting lug support (103) are fixedly connected below the cross beam main body (106), two support connecting plates (108) are connected to two sides of the front lifting lug support (107), the lower ends of the support connecting plates (108) are connected with the front lifting lug ends of the third-order gradual-change stiffness steel plate spring assembly (3) through bolts, the rear lifting lug support (103) is internally provided with rear lifting lug sleeves (102), two ends of each rear lifting lug sleeve (102) and two side plates (104) are rotatably connected outside the rear lifting lug support (103), and the lower ends of each side plate (104) are rotatably connected with the rear lifting lug ends of the third-order gradual-change stiffness steel plate spring assembly (3) through bolts.
3. The automobile third-order gradual change stiffness steel plate spring fatigue test device according to claim 2, wherein: third order gradual change rigidity leaf spring assembly (3) include third order gradual change rigidity leaf spring (304), rear axle buffer block (302), lower plate (305) and connect bedplate (306), rear axle buffer block (302), third order gradual change rigidity leaf spring (304), lower plate (305) and connect bedplate (306) from last to setting gradually down and by two U type bolts (301) locking, connect bedplate (306) below and coupling mechanism (4) are connected, preceding reel end linking bridge connecting plate (108) of third order gradual change rigidity leaf spring (304), and the back reel end is connected with back lug sleeve (102), lug curb plate (104) rotation through back lug bush (303).
4. The automobile third-order gradual change stiffness steel plate spring fatigue test device according to claim 1, wherein: the flywheel crank-connecting rod mechanism assembly (7) comprises a flywheel (701), a crankshaft assembly (702), a bearing support seat (703) and a connecting rod (704), wherein the flywheel (701) is connected with a motor assembly (6) through a belt, an output shaft of the flywheel (701) is connected with a near-end crank block of the crankshaft assembly (702), the crankshaft assembly (702) is fixed with the ground through the bearing support seat (703), an eccentric rod at a crank position of the crankshaft assembly is connected with a bearing at the lower end of the connecting rod (704), and the upper end of the connecting rod (704) is connected with a push rod and a vertical guide antifriction sleeve assembly (5).
5. The device for testing fatigue of the three-stage gradual change stiffness steel plate spring of the automobile according to claim 4 is characterized in that: the push rod and vertical guide antifriction sleeve assembly (5) comprises a push rod (502) and a vertical guide antifriction sleeve (501), the vertical guide antifriction sleeve (501) is fixed on a workbench (8), the lower end of the push rod (502) is connected with a connecting rod (704) through a bearing, the upper end of the push rod passes through the vertical guide antifriction sleeve (501) and then is in threaded connection with a base connecting plate (504), and the base connecting plate (504) is connected with a connecting mechanism (4).
6. The automobile third-order gradual change stiffness steel plate spring fatigue test device according to claim 5, wherein: coupling mechanism (4) include base (403), dabber (405) and outer steel bushing (401), base (403) below is fixed with base connecting plate (504), and on base (403) was located in dabber (405), both ends were connected fixedly with base (403), and its axial is taken spacing recess, outer steel bushing (401) overlaps outside dabber (405), establishes ball (406) with between dabber (405), its upper end still with third-order gradual change rigidity leaf spring assembly (3) are connected through the lug, can drive third-order gradual change rigidity leaf spring assembly (3) and slide about dabber (405).
7. The device for testing fatigue of the three-stage gradual change stiffness steel plate spring of the automobile according to claim 3, wherein the device comprises the following components: the second-order auxiliary spring anti-collision mechanism (2) comprises a second-order auxiliary spring front anti-collision support (204), a second-order auxiliary spring front anti-collision block (205), a second-order auxiliary spring rear anti-collision support (202), a second-order auxiliary spring rear anti-collision block (201) and a rear axle anti-collision support (203), the second-order auxiliary spring front anti-collision support (204), the rear axle anti-collision support (203) and the second-order auxiliary spring rear anti-collision support (202) are fixed below the beam main body (106), the second-order auxiliary spring front anti-collision block (205) is arranged below the second-order auxiliary spring front anti-collision support (204) and corresponds to the second-order auxiliary spring front end of the third-order gradual-change stiffness steel plate spring assembly (3), the second-order auxiliary spring rear anti-collision block (201) is arranged below the second-order auxiliary spring rear anti-collision support (202) and corresponds to the second-order auxiliary spring rear end of the third-order gradual-change stiffness steel plate spring assembly (3), and the rear axle anti-collision support (203) corresponds to the rear axle buffer block (302) of the third-order gradual-change stiffness steel plate spring assembly (3).
8. The automobile third-order gradual change stiffness steel plate spring fatigue test device according to claim 2, wherein: reinforcing plates (105) are arranged on two sides of two longitudinal beam main bodies (109) of the gantry crane assembly (1), and the lower part of the gantry crane assembly is fixedly arranged on a workbench (8) through a bottom connecting plate (110).
9. The automobile third-order gradual change stiffness steel plate spring fatigue test device according to claim 5, wherein: a displacement sensor (503) is arranged below the base connecting plate (504).
10. The automobile third-order gradual change stiffness steel plate spring fatigue test device according to claim 6, wherein: both ends of the outer steel sleeve (401) are respectively provided with a blocking piece (402) and a gasket (404).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321651968.1U CN220063334U (en) | 2023-06-27 | 2023-06-27 | Automobile third-order gradual change stiffness leaf spring fatigue test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321651968.1U CN220063334U (en) | 2023-06-27 | 2023-06-27 | Automobile third-order gradual change stiffness leaf spring fatigue test device |
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| Publication Number | Publication Date |
|---|---|
| CN220063334U true CN220063334U (en) | 2023-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321651968.1U Active CN220063334U (en) | 2023-06-27 | 2023-06-27 | Automobile third-order gradual change stiffness leaf spring fatigue test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220063334U (en) |
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- 2023-06-27 CN CN202321651968.1U patent/CN220063334U/en active Active
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