CN113933170B - Leaf spring rigidity testing arrangement - Google Patents
Leaf spring rigidity testing arrangement Download PDFInfo
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- CN113933170B CN113933170B CN202111191751.2A CN202111191751A CN113933170B CN 113933170 B CN113933170 B CN 113933170B CN 202111191751 A CN202111191751 A CN 202111191751A CN 113933170 B CN113933170 B CN 113933170B
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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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
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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
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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
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
Abstract
The application discloses a leaf spring stiffness testing device, which relates to the technical field of vehicle leaf spring detection and comprises a fixed plate and a dynamic stiffness testing mechanism, wherein the dynamic stiffness testing mechanism is positioned at the top of the fixed plate, two sides of the front surface of the fixed plate are fixedly provided with auxiliary spring brackets, leaf spring bodies are placed at the tops of the two auxiliary spring brackets, a fixed assembly is rotationally arranged at the bottom end of a thrust rod in the dynamic stiffness testing mechanism, an upper transmission assembly is rotationally arranged at the left side of the bottom of a top plate in the dynamic stiffness testing mechanism, and a lower transmission assembly is rotationally arranged at the left side of the back of the fixed plate. According to the application, the positioning of the leaf spring body can be automatically completed in the process that the fixing assembly descends to the top of the leaf spring body, complicated manual operation is not needed, the disassembly and assembly efficiency of the leaf spring body is effectively improved, the overall testing efficiency is further improved, and the influence on the production rhythm of enterprises due to low quality inspection efficiency is avoided.
Description
Technical Field
The application relates to the technical field of detection of vehicle steel plate leaf springs, in particular to a steel plate spring stiffness testing device.
Background
The leaf spring assembly is generally composed of a single leaf spring or a plurality of leaf springs, can bear vertical load during operation, can bear transverse and longitudinal load, and also serves as a guide mechanism. Static stiffness refers to the ability to resist deformation under static load, and dynamic stiffness refers to the ability to resist deformation under dynamic load, i.e., the dynamic force required per unit amplitude. In general, the stiffness of a leaf spring suspension system is equal to that of the leaf spring, so that only the stiffness of the leaf spring is often considered, but the influence factors after actual assembly are not considered, for example, in real vehicle assembly, in order to enable an automobile to have an understeer trend, the front and rear lugs of the leaf spring have a larger height difference, and a certain angle is formed between the central line of the front and rear lugs of the leaf spring and a horizontal line, so that a certain difference exists between the leaf spring stiffness and the leaf spring stiffness.
The issued patent of patent application publication number CN 106556499B discloses a leaf spring stiffness testing device comprising: the fixing frame comprises a fixing frame body, wherein a plate spring is obliquely fixed on the fixing frame body, and the plate spring is fixed through a fixing seat which is arranged at the top of the plate spring in a matched mode through a saddle bolt in the middle; the bottom end of the thrust rod is rotationally connected with the fixed seat; a pressure sensor provided at the tip of the thrust rod; the vibration exciter is connected with the thrust rod through the pressure sensor. According to the scheme, a load with certain amplitude and frequency is input through a vibration exciter as required, the left and right sides of the plate spring are fixed, the height is inconsistent to simulate the dynamic load condition, a thrust rod acts on a plate spring assembly, a pressure sensor records the load, the deformation quantity of the plate spring under the fixed load is measured, the characteristic curve of the rigidity of the plate spring under the loading and unloading states is drawn further, and then the dynamic rigidity of the plate spring is tidied according to a specified method.
However, after the device is actually used, the research and development personnel in the field find that the device still has some defects, and obviously, in order to effectively test the leaf spring, the leaf spring in an inclined state needs to be fixed, the fixing mode comprises the steps of bearing the leaf spring by using two auxiliary spring supports, sleeving the left end of the leaf spring on a left lifting lug support, sleeving the right end of the leaf spring on a right lifting lug support and connecting a saddle bolt with a fixed seat, so that the operation is complicated, more time is consumed, and meanwhile, the operation is required to be repeated reversely when the device is dismounted, so that the actual test efficiency is too low, and the production rhythm of enterprises is seriously influenced.
Therefore, it is necessary to invent a leaf spring stiffness testing device to solve the above-mentioned problems.
Disclosure of Invention
The application aims to provide a leaf spring stiffness testing device which is used for solving the problems in the background technology.
In order to achieve the above purpose, the present application provides the following technical solutions: the utility model provides a leaf spring rigidity testing arrangement, includes fixed plate and dynamic stiffness testing mechanism, dynamic stiffness testing mechanism is located the fixed plate top, the fixed plate openly both sides are all fixed and are provided with vice spring bracket, two vice spring bracket top has placed the leaf spring body, the distance rod bottom in the dynamic stiffness testing mechanism rotates and is provided with fixed subassembly, roof bottom left side in the dynamic stiffness testing mechanism rotates and is provided with drive assembly, the left side rotates behind the fixed plate and is provided with down drive assembly, go up drive assembly and lower drive assembly transmission connection, the fixed movable bracket subassembly that is provided with in slip sleeve right side in the lower drive assembly, the fixed trigger mechanism that is provided with in screw thread lantern ring top in the lower drive assembly, when the lifter in the dynamic stiffness testing mechanism descends, the rack synchronous decline in the drive assembly, and then make the gear in the lower drive assembly drive second screw rod take place to rotate, and the direction that is close to the fixed plate moves, when the lifter descends to first threshold value, and the second bracket rod passes the second bracket rod and the jack rod in the second bracket rod and carries out the fixed bracket rod and carries out the jack-up-down distance rod, and the jack bolt when the second jack rod passes down in the fixed plate spring body and the jack-up end of the jack rod, the jack rod in the fixed plate when reaching the fixed plate and the fixed plate in the jack rod of the jack rod.
Preferably, the dynamic stiffness testing mechanism comprises a top plate, a hydraulic cylinder, a vibration exciter, a pressure sensor, a lifting plate and a thrust rod, wherein the hydraulic cylinder is fixedly arranged at the top of the top plate, an output shaft of the hydraulic cylinder penetrates through the top of the top plate and extends to the bottom of the top plate to be fixedly connected with the vibration exciter, the pressure sensor is fixedly arranged at the bottom of the vibration exciter, the lifting plate is fixedly arranged at the bottom of the pressure sensor, and the thrust rod is rotationally arranged on the right side of the bottom of the lifting plate.
Preferably, the fixed subassembly includes fixing base, accommodation hole, middle slide, sideslip way, intermediate lever, first spring, side lever and arc cardboard, the fixing base rotates with the distance rod bottom and is connected, accommodation hole, side slide, side lever and arc cardboard all are provided with four, four the accommodation hole is seted up in fixing base bottom four corners respectively, the intermediate lever is seted up inside the fixing base, and its opening extends to fixing base back middle part, four the sideslip way is seted up respectively on the intermediate slide both sides wall, the intermediate lever slides and sets up inside the intermediate slide, first spring one end and intermediate lever fixed connection and the other end and intermediate slide inner wall fixed connection, four the side lever slides respectively and sets up in four sideslips inboardly, and all with intermediate lever fixed connection, four the arc cardboard is located four accommodation hole inboards respectively, and respectively with four side lever fixed connection.
Preferably, the upper transmission assembly comprises a lifting rod and a rack, wherein the lifting rod is fixedly arranged on the left side of the bottom of the lifting plate, and the rack is fixedly arranged on the bottom of the right side of the lifting rod.
Preferably, the lower transmission assembly comprises a second screw rod, a gear, a thread lantern ring, an elastic member and a sliding sleeve, wherein the second screw rod is rotationally connected with the fixed plate through a bearing, the gear is slidably arranged at the rear end of the second screw rod and meshed with the rack, the thread lantern ring is sleeved outside the second screw rod and is in threaded connection with the second screw rod, the elastic member and the sliding sleeve are both slidably sleeved outside the second screw rod, and one end of the elastic member is fixedly connected with the thread lantern ring and the other end of the elastic member is fixedly connected with the sliding sleeve.
Preferably, the movable support assembly comprises a back plate, a first support rod, a movable plate and a second support rod, wherein the back plate is fixedly arranged on the right side of the sliding sleeve, the first support rod is fixedly arranged on the left side of the front surface of the back plate, the movable plate is rotatably arranged on the right side of the front surface of the back plate, and the second support rod is fixedly arranged at the bottom of the front surface of the movable plate.
Preferably, the trigger mechanism comprises an L-shaped connecting rod and a trigger push plate, wherein the L-shaped connecting rod is fixedly arranged at the top of the threaded lantern ring, the trigger push plate is fixedly arranged at the end part of the L-shaped connecting rod, and the trigger push plate is positioned at the rear side of the fixing assembly.
Preferably, the elastic component includes second spring, interior slip casing, outer slip casing, telescopic link, connecting plate, spout, slider, third spring and connecting pipe, the second spring cup joints and sets up in the second screw rod outside, and its one end and interior slip casing fixed connection and the other end and outer slip casing fixed connection, interior slip casing cup joints respectively with outer slip casing and sets up in second spring outside both ends, just interior slip casing slides and sets up in outer slip casing inboard, interior slip casing and screw thread lantern ring fixed connection, outer slip casing and slip sleeve fixed connection, the telescopic link is fixed to be set up in interior slip casing right side, connecting plate fixed connection is in the telescopic link tip, the spout is seted up on the second screw rod, the slider slides and sets up in spout inside and with gear fixed connection, third spring one end and slider fixed connection and other end and spout inner wall fixed connection, cup joint sets up in the second screw rod outside and with gear fixed connection, the connecting plate passes through the bearing rotation and cup joints and sets up in the outside.
The application has the technical effects and advantages that:
according to the application, the fixed assembly, the upper transmission assembly, the lower transmission assembly, the movable bracket assembly and the trigger mechanism are arranged, so that when the lifting plate in the dynamic stiffness testing mechanism descends, the rack in the upper transmission assembly is driven to synchronously descend, and the second screw rod in the lower transmission assembly is further rotated, at the moment, the threaded lantern ring in the lower transmission assembly drives the movable bracket assembly and the trigger mechanism to move towards the direction close to the fixed plate, when the descending distance of the lifting plate reaches a first threshold value, the first bracket rod and the second bracket rod in the movable bracket assembly penetrate through the fixed plate under the drive of the sliding sleeve and enter the positioning holes at two ends of the steel plate spring body, the steel plate spring body is positioned, and when the descending distance of the lifting plate reaches a second threshold value, the accommodating hole in the fixed assembly is sleeved on the outer side of the saddle bolt at the top of the steel plate spring body, and the trigger push plate in the trigger mechanism pushes the middle rod in the fixed assembly under the drive of the threaded lantern ring, so that the arc clamping plate spring body is clamped at the top of the saddle bolt.
Drawings
Fig. 1 is a schematic overall front view of the present application.
Fig. 2 is a schematic view showing a bottom cross-sectional structure of the fixing assembly of the present application.
Fig. 3 is a schematic front view of the upper transmission assembly of the present application.
Fig. 4 is a schematic top view of the lower transmission assembly, the movable bracket assembly and the trigger mechanism of the present application.
Fig. 5 is a schematic front view of the movable bracket assembly of the present application.
Fig. 6 is a schematic top view of the elastic member of the present application.
In the figure: 1. a fixing plate; 11. a secondary spring support; 12. a leaf spring body; 2. a dynamic stiffness testing mechanism; 21. a top plate; 22. a hydraulic cylinder; 23. a vibration exciter; 24. a pressure sensor; 25. a lifting plate; 26. a thrust rod; 3. a fixing assembly; 31. a fixing seat; 32. a receiving hole; 33. a middle slideway; 34. a side slideway; 35. an intermediate lever; 36. a first spring; 37. a side bar; 38. an arc-shaped clamping plate; 4. an upper transmission assembly; 41. a lifting rod; 42. a rack; 5. a lower transmission assembly; 51. a second screw; 52. a gear; 53. a threaded collar; 54. an elastic member; 55. sliding the sleeve; 541. a second spring; 542. an inner slide housing; 543. an outer slide housing; 544. a telescopic rod; 545. a connecting plate; 546. a chute; 547. a slide block; 548. a third spring; 549. a connecting pipe; 6. a movable bracket assembly; 61. a back plate; 62. a first bracket bar; 63. a movable plate; 64. a second bracket rod; 7. a trigger mechanism; 71. an L-shaped connecting rod; 72. triggering the push plate.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Example 1
The application provides a leaf spring stiffness testing device as shown in figures 1-6, which comprises a fixed plate 1 and a dynamic stiffness testing mechanism 2, wherein the dynamic stiffness testing mechanism 2 is positioned at the top of the fixed plate 1, two sides of the front surface of the fixed plate 1 are fixedly provided with auxiliary spring brackets 11, leaf spring bodies 12 are arranged at the tops of the two auxiliary spring brackets 11, a fixed component 3 is rotatably arranged at the bottom end of a thrust rod 26 in the dynamic stiffness testing mechanism 2, an upper transmission component 4 is rotatably arranged at the left side of the bottom of a top plate 21 in the dynamic stiffness testing mechanism 2, a lower transmission component 5 is rotatably arranged at the left side of the back of the fixed plate 1, the upper transmission component 4 is in transmission connection with the lower transmission component 5, a movable bracket component 6 is fixedly arranged at the right side of a sliding sleeve 55 in the lower transmission component 5, a trigger mechanism 7 is fixedly arranged at the top of a threaded collar 53 in the lower transmission component 5, when the lifting plate 25 in the dynamic stiffness testing mechanism 2 descends, the rack 42 in the upper transmission assembly 4 is driven to synchronously descend, so that the gear 52 in the lower transmission assembly 5 drives the second screw rod 51 to rotate, at the moment, the threaded collar 53 in the lower transmission assembly 5 drives the movable bracket assembly 6 and the trigger mechanism 7 to move towards the direction close to the fixed plate 1, when the descending distance of the lifting plate 25 reaches a first threshold value, the first bracket rod 62 and the second bracket rod 64 in the movable bracket assembly 6 penetrate through the fixed plate 1 and enter into the positioning holes at the two ends of the steel plate spring body 12 under the driving of the sliding sleeve 55, the steel plate spring body 12 is positioned, when the descending distance of the lifting plate 25 reaches a second threshold value, the accommodating hole 32 in the fixed assembly 3 is sleeved on the outer side of the riding bolt at the top of the steel plate spring body 12, meanwhile, the trigger push plate 72 in the trigger mechanism 7 pushes the middle rod 35 in the fixed assembly 3 under the drive of the threaded lantern ring 53, so that the arc-shaped clamping plate 38 clamps the top of the saddle bolt on the leaf spring body 12.
It should be further noted that, the vibration exciter 23 and the pressure sensor 24 in the dynamic stiffness testing mechanism 2 belong to the technologies disclosed in the prior art, and do not belong to the essential technical features of the present application, so the specific structure and model of the present application are not described herein.
As shown in fig. 1, the dynamic stiffness testing mechanism 2 includes a top plate 21, a hydraulic cylinder 22, a vibration exciter 23, a pressure sensor 24, a lifting plate 25 and a thrust rod 26.
More specifically, the hydraulic cylinder 22 is fixedly arranged at the top of the top plate 21, the output shaft of the hydraulic cylinder 22 penetrates through the top of the top plate 21 and extends to the bottom of the top plate 21 to be fixedly connected with the vibration exciter 23, the pressure sensor 24 is fixedly arranged at the bottom of the vibration exciter 23, the lifting plate 25 is fixedly arranged at the bottom of the pressure sensor 24, the thrust rod 26 is rotatably arranged at the right side of the bottom of the lifting plate 25, so that when the leaf spring body 12 is placed at the tops of the auxiliary spring brackets 11 on the two sides of the front surface of the fixed plate 1, the two auxiliary spring brackets 11 bear and primarily limit the leaf spring body 12, the hydraulic cylinder 22 drives the output shaft of the hydraulic cylinder 22 to extend, the output shaft of the hydraulic cylinder 22 extends and then drives the vibration exciter 23, the pressure sensor 24, the lifting plate 25, the thrust rod 26 and the fixing component 3 to synchronously descend, at the moment, the fixing component 3 presses the top of the leaf spring body 12, after the vibration exciter 23 acts on the leaf spring body 12, a load with a certain amplitude and a certain frequency is generated by the vibration exciter 23, the load is acted on the leaf spring body 12, the vibration exciter 23 records the load, the corresponding relation between the deformation amount and the load of the leaf spring body 12 after the load is applied, so that the leaf spring body 12 is plotted under the condition of the load, and the characteristic curve of the leaf spring is set according to the method of the leaf spring stiffness change of the leaf spring body 12.
As shown in fig. 2, the fixing assembly 3 includes a fixing base 31, a receiving hole 32, a middle slide 33, a side slide 34, a middle bar 35, a first spring 36, side bars 37, and an arc-shaped clamping plate 38.
More specifically, fixing base 31 and thrust rod 26 bottom rotate to be connected, hold hole 32, sideslip way 34, side lever 37 and arc cardboard 38 all are provided with four, four hold hole 32 respectively offer in fixing base 31 bottom four corners, middle slide 33 is offered in fixing base 31 inside, and its opening extends to fixing base 31 back middle part, four sideslip way 34 is offered respectively on middle slide 33 both sides wall, middle pole 35 slides and sets up in middle slide 33 inside, first spring 36 one end and middle pole 35 fixed connection and the other end and middle slide 33 inner wall fixed connection, four side lever 37 slides respectively and sets up in four side slides 34 inboardly, and all with middle pole 35 fixed connection, four arc cardboard 38 is located four respectively and holds hole 32 inboardly, and respectively with four side lever 37 fixed connection to when middle pole 35 is pushed forward, middle pole 35 drives four arc cardboard 38 and moves in four inside holding hole 32 through four side levers 37, and then makes four arc cardboard 38 can promote respectively in two outside two side levers 35 when the automatic cladding is not pushed down by two side levers 35, and the reset bolt 37 is relieved to the both ends when the middle lever 35 is simultaneously reset to the side lever, and the bolt is passed through to the side lever 35.
As shown in fig. 3, the upper transmission assembly 4 includes a lifting rod 41 and a rack 42.
More specifically, the lifting rod 41 is fixedly disposed at the left side of the bottom of the lifting plate 25, and the rack 42 is fixedly disposed at the bottom of the right side of the lifting rod 41, so that when the lifting rod 41 drives the rack 42 to descend, it can drive the second screw 51 to rotate through the gear 52 in the lower transmission assembly 5.
As shown in fig. 4, the lower transmission assembly 5 includes a second screw 51, a gear 52, a threaded collar 53, an elastic member 54, and a sliding sleeve 55.
More specifically, the second screw rod 51 is rotatably connected with the fixing plate 1 through a bearing, the gear 52 is slidably disposed at the rear end of the second screw rod 51 and is meshed with the rack 42, the threaded collar 53 is sleeved on the outer side of the second screw rod 51 and is in threaded connection with the second screw rod 51, the elastic member 54 is slidably sleeved on the outer side of the second screw rod 51 with the sliding sleeve 55, one end of the elastic member 54 is fixedly connected with the threaded collar 53, and the other end of the elastic member 54 is fixedly connected with the sliding sleeve 55, so that when the second screw rod 51 rotates, the movable bracket assembly 6 and the triggering mechanism 7 can be driven to move through the threaded collar 53 and the sliding sleeve 55.
Meanwhile, the movable bracket assembly 6 includes a back plate 61, a first bracket bar 62, a movable plate 63, and a second bracket bar 64.
More specifically, the back plate 61 is fixedly arranged on the right side of the sliding sleeve 55, the first support rod 62 is fixedly arranged on the left side of the front side of the back plate 61, the movable plate 63 is rotatably arranged on the right side of the front side of the back plate 61, and the second support rod 64 is fixedly arranged at the bottom of the front side of the movable plate 63, so that under the driving of the sliding sleeve 55, the back plate 61 drives the first support rod 62 and the second support rod 64 to penetrate through the fixed plate 1 and respectively enter into positioning holes at two ends of the leaf spring body 12, and the leaf spring body 12 is positioned.
In addition, the triggering mechanism 7 includes an L-shaped connecting rod 71 and a triggering push plate 72.
More specifically, the L-shaped connecting rod 71 is fixedly disposed at the top of the threaded collar 53, the trigger push plate 72 is fixedly disposed at the end of the L-shaped connecting rod 71, and the trigger push plate 72 is located at the rear side of the fixing component 3, so that the trigger push plate 72 moves in a direction close to the fixing plate 1 under the driving of the threaded collar 53, and then pushes the intermediate rod 35 in the fixing component 3.
Example 2
Unlike the above embodiment, after actual study by those skilled in the art, it is found that, in the process of actually testing the leaf spring by the above device, when the leaf spring breaks due to unqualified quality, the lifting plate 25 will drive the upper transmission assembly 4 to excessively descend, and at this time, the gear 52 will drive the trigger mechanism 7 to excessively push the fixing assembly 3, so that the side rod 37 and the arc clamping plate 38 are damaged and deformed, as shown in fig. 6, for the above situation:
the present application makes the elastic member 54 include a second spring 541, a inner sliding housing 542, an outer sliding housing 543, a telescopic link 544, a connection plate 545, a chute 546, a slider 547, a third spring 548, and a connection pipe 549.
More specifically, the second spring 541 is sleeved outside the second screw rod 51, one end of the second spring 541 is fixedly connected with the inner sliding casing 542, the other end of the second spring 541 is fixedly connected with the outer sliding casing 543, the inner sliding casing 542 and the outer sliding casing 543 are respectively sleeved at two ends of the outer side of the second spring 541, the inner sliding casing 542 is slidably arranged inside the outer sliding casing 543, the inner sliding casing 542 is fixedly connected with the threaded collar 53, the outer sliding casing 543 is fixedly connected with the sliding sleeve 55, the telescopic rod 544 is fixedly arranged on the right side of the inner sliding casing 542, the connecting plate 545 is fixedly connected with the end of the telescopic rod 544, the sliding groove 546 is formed in the second screw rod 51, the sliding block 547 is slidably arranged inside the sliding groove 546 and is fixedly connected with the gear 52, one end of the third spring 548 is fixedly connected with the sliding block 547, the other end of the third spring 54549 is sleeved outside the second screw rod 51 and is fixedly connected with the gear 52, and the connecting plate 545 is rotatably sleeved outside the connecting pipe 549 through a bearing.
As can be seen from the above description, when the plate spring breaks and causes the hydraulic cylinder 22 to drive the lifting plate 25 to excessively descend, the second screw rod 51 continues to rotate under the driving of the gear 52 at this time, so that the threaded collar 53 pushes the inner sliding housing 542, and when the threaded collar 53 drives the trigger mechanism 7 to trigger the fixing assembly 3, the telescopic rod 544 is already stretched to the maximum state, so as to continue moving the inner sliding housing 542 inside the outer sliding housing 543, the telescopic rod 544 pulls the sliding slot 546 through the connecting plate 545, and the sliding slot 546 pulls the gear 52, and due to the arrangement of the sliding block 547, the gear 52 drives the sliding block 547 to slide in the direction close to the fixing plate 1 inside the sliding slot 546, and then to disengage from the rack 42, so that no transmission occurs, and the second screw rod 51 is no longer driven to rotate, thereby avoiding excessive triggering of the fixing assembly 3 by the trigger mechanism 7 caused by excessive driving of the second screw rod 51 by the gear 52.
The working principle of the application is as follows:
in the actual use process, the hydraulic cylinder 22 is in a shortened state, and a technician can place the leaf spring body 12 on the tops of the auxiliary spring brackets 11 on the two sides of the front surface of the fixed plate 1, and the two auxiliary spring brackets 11 bear the load of the leaf spring body 12 and primarily limit the leaf spring body;
at this time, the technician can make the hydraulic cylinder 22 drive the output shaft to extend, and the output shaft of the hydraulic cylinder 22 extends to drive the vibration exciter 23, the pressure sensor 24, the lifting plate 25, the thrust rod 26 and the fixing component 3 to synchronously descend;
in the process of descending the lifting plate 25, when the descending distance of the lifting plate 25 reaches a first threshold value, the lifting plate 25 drives the rack 42 to descend through the lifting rod 41, the rack 42 drives the gear 52 to rotate when descending, the gear 52 drives the threaded collar 53 to move in the direction of approaching the fixed plate 1 on the outer side of the gear 52, meanwhile, the threaded collar 53 pushes the sliding sleeve 55 through the elastic member 54 when moving, and the sliding sleeve 55 drives the first bracket rod 62 and the second bracket rod 64 to pass through the fixed plate 1 through the back plate 61 and respectively enter into positioning holes at two ends of the leaf spring body 12 to position the leaf spring body 12, and at the moment, the sliding sleeve 55 is attached to the fixed plate 1;
as the lifting plate 25 continues to descend, the threaded collar 53 continues to move, the sliding sleeve 55 does not move any more, the elastic member 54 is compressed, when the descending distance of the lifting plate 25 reaches a second threshold value, the accommodating hole 32 is sleeved on the outer side of the saddle bolt at the top of the leaf spring body 12, and meanwhile the push plate 72 is triggered to push the middle rod 35 in the fixing assembly 3 under the drive of the threaded collar 53, so that the arc clamping plate 38 clamps the top of the saddle bolt on the leaf spring body 12;
then starting a vibration exciter 23, wherein the vibration exciter 23 generates a load with certain amplitude and frequency, the load acts on the leaf spring body 12 through a thrust rod 26, the vibration exciter 23 records the load, and the dynamic stiffness of the leaf spring body 12 is tidied according to a specified method by measuring the corresponding relation between the deformation amount of the leaf spring body 12 and the load after the load is applied, so that a change characteristic curve of the stiffness of the leaf spring body 12 is drawn under the condition of dynamic load;
after the test is finished, the hydraulic cylinder 22 drives the vibration exciter 23, the pressure sensor 24, the lifting plate 25, the thrust rod 26 and the fixing assembly 3 to synchronously rise, at the moment, the triggering push plate 72 is driven by the threaded sleeve ring 53 to not push the middle rod 35 any more, and the middle rod 35 automatically drives the side rod 37 and the arc clamping plate 38 to reset under the elasticity of the first spring 36, so that the limit of the riding bolt is relieved;
simultaneously, the sliding sleeve 55 drives the back plate 61 to move backwards, so that the first bracket rod 62 and the second bracket rod 64 are separated from the positioning holes at the two ends of the leaf spring body 12, and a technician can take down the leaf spring body 12 from the tops of the two auxiliary spring brackets 11.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present application, and although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present application.
Claims (3)
1. The utility model provides a leaf spring rigidity testing arrangement, includes fixed plate (1) and dynamic stiffness testing mechanism (2), dynamic stiffness testing mechanism (2) are located fixed plate (1) top, fixed plate (1) openly both sides are all fixed to be provided with vice spring bracket (11), two leaf spring body (12), its characterized in that have been placed at vice spring bracket (11) top: the bottom end of a thrust rod (26) in the dynamic stiffness testing mechanism (2) is rotatably provided with a fixed component (3), the left side of the bottom of a top plate (21) in the dynamic stiffness testing mechanism (2) is rotatably provided with an upper transmission component (4), the left side of the back of the fixed plate (1) is rotatably provided with a lower transmission component (5), the upper transmission component (4) is in transmission connection with the lower transmission component (5), the right side of a sliding sleeve (55) in the lower transmission component (5) is fixedly provided with a movable bracket component (6), the top of a threaded sleeve ring (53) in the lower transmission component (5) is fixedly provided with a triggering mechanism (7), when a lifting plate (25) in the dynamic stiffness testing mechanism (2) descends, a rack (42) in the upper transmission component (4) is driven to synchronously descend, a gear (52) in the lower transmission component (5) is further driven to rotate a second screw (51), at the moment, the threaded sleeve (53) in the lower transmission component (5) drives the movable bracket component (6) and the triggering mechanism (7) to move towards the fixed plate (1) in the direction of approaching to the first lifting plate (25), and when the descending distance reaches a first threshold value, the first bracket rod (62) and the second bracket rod (64) in the movable bracket assembly (6) pass through the fixed plate (1) and enter into positioning holes at two ends of the leaf spring body (12) under the drive of the sliding sleeve (55), the leaf spring body (12) is positioned, when the descending distance of the lifting plate (25) reaches a second threshold value, the accommodating hole (32) in the fixed assembly (3) is sleeved on the outer side of a saddle bolt at the top of the leaf spring body (12), and meanwhile, the triggering push plate (72) in the triggering mechanism (7) pushes the middle rod (35) in the fixed assembly (3) under the drive of the threaded sleeve ring (53) so that the arc-shaped clamping plate (38) clamps the top of the saddle bolt on the leaf spring body (12);
the fixing assembly (3) comprises a fixing seat (31), containing holes (32), a middle slide way (33), side sliding ways (34), a middle rod (35), a first spring (36), side rods (37) and an arc clamping plate (38), wherein the fixing seat (31) is rotationally connected with the bottom end of a thrust rod (26), the containing holes (32), the side sliding ways (34), the side rods (37) and the arc clamping plate (38) are all four, the four containing holes (32) are respectively formed in four corners at the bottom of the fixing seat (31), the middle slide way (33) is formed in the fixing seat (31), an opening of the middle slide way extends to the middle part of the back of the fixing seat (31), the four side slide ways (34) are respectively formed in two side walls of the middle slide way (33), the middle rod (35) is slidably arranged in the middle slide way (33), one end of the first spring (36) is fixedly connected with the middle rod (35) and the other end of the side rod is fixedly connected with the inner wall of the middle slide way (33), the four side rods (37) are respectively slidably arranged on the inner sides of the four side slide ways (34), and the four side rods (37) are respectively fixedly connected with the four side rods (37) and the four side rods (37) are respectively fixedly connected with the four side rods (37 respectively;
the upper transmission assembly (4) comprises a lifting rod (41) and a rack (42), wherein the lifting rod (41) is fixedly arranged at the left side of the bottom of the lifting plate (25), and the rack (42) is fixedly arranged at the bottom of the right side of the lifting rod (41);
the lower transmission assembly (5) comprises a second screw (51), a gear (52), a threaded sleeve (53), an elastic member (54) and a sliding sleeve (55), wherein the second screw (51) is rotationally connected with the fixed plate (1) through a bearing, the gear (52) is slidably arranged at the rear end of the second screw (51) and meshed with the rack (42), the threaded sleeve (53) is sleeved on the outer side of the second screw (51) and is in threaded connection with the second screw (51), the elastic member (54) and the sliding sleeve (55) are slidably sleeved on the outer side of the second screw (51), one end of the elastic member (54) is fixedly connected with the threaded sleeve (53) and the other end of the elastic member (54) is fixedly connected with the sliding sleeve (55);
the movable bracket assembly (6) comprises a back plate (61), a first bracket rod (62), a movable plate (63) and a second bracket rod (64), wherein the back plate (61) is fixedly arranged on the right side of the sliding sleeve (55), the first bracket rod (62) is fixedly arranged on the left side of the front surface of the back plate (61), the movable plate (63) is rotatably arranged on the right side of the front surface of the back plate (61), and the second bracket rod (64) is fixedly arranged at the bottom of the front surface of the movable plate (63);
the trigger mechanism (7) comprises an L-shaped connecting rod (71) and a trigger push plate (72), wherein the L-shaped connecting rod (71) is fixedly arranged at the top of the threaded sleeve ring (53), the trigger push plate (72) is fixedly arranged at the end part of the L-shaped connecting rod (71), and the trigger push plate (72) is positioned at the rear side of the fixing assembly (3).
2. The leaf spring stiffness testing apparatus of claim 1, wherein: the dynamic stiffness testing mechanism (2) comprises a top plate (21), a hydraulic cylinder (22), a vibration exciter (23), a pressure sensor (24), a lifting plate (25) and a thrust rod (26), wherein the hydraulic cylinder (22) is fixedly arranged at the top of the top plate (21) and an output shaft of the hydraulic cylinder penetrates through the top of the top plate (21) and extends to the bottom of the top plate (21) to be fixedly connected with the vibration exciter (23), the pressure sensor (24) is fixedly arranged at the bottom of the vibration exciter (23), the lifting plate (25) is fixedly arranged at the bottom of the pressure sensor (24), and the thrust rod (26) is rotatably arranged at the right side of the bottom of the lifting plate (25).
3. A leaf spring rate testing apparatus according to claim 2, wherein: the elastic component (54) comprises a second spring (541), a sliding shell (542), an outer sliding shell (543), a telescopic rod (542), a connecting plate (545), a sliding groove (546), a sliding block (547), a third spring (548) and a connecting pipe (549), wherein the second spring (541) is sleeved outside the second screw rod (51), one end of the second spring (541) is fixedly connected with the sliding shell (542) and the other end of the second spring is fixedly connected with the outer sliding shell (543), the sliding shell (542) and the outer sliding shell (543) are respectively sleeved at two ends outside the second spring (541), the sliding shell (542) is arranged on the inner side of the outer sliding shell (543), the sliding shell (542) is fixedly connected with the sliding sleeve (55), the telescopic rod (544) is fixedly arranged on the right side of the inner sliding shell (542), the connecting plate (544) is fixedly connected with the end of the telescopic rod (544), the sliding groove (546) is respectively sleeved on the two ends of the second spring (541), the sliding shell (542) is fixedly connected with the inner wall (546) and the sliding sleeve (53) is fixedly connected with the inner wall (546) of the sliding sleeve (55), the connecting pipe (549) is sleeved on the outer side of the second screw rod (51) and is fixedly connected with the gear (52), and the connecting plate (545) is rotatably sleeved on the outer side of the connecting pipe (549) through a bearing.
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| CN208125349U (en) * | 2018-04-02 | 2018-11-20 | 重庆红旗金龙弹簧有限公司 | A kind of automobile leaf spring rigidity test equipment |
| CN208547453U (en) * | 2018-06-09 | 2019-02-26 | 金剑 | A kind of dedicated verifying attachment of few-leaf-spring |
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2021
- 2021-10-13 CN CN202111191751.2A patent/CN113933170B/en active Active
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| US6199427B1 (en) * | 1997-12-04 | 2001-03-13 | Intercomp Company | Apparatus and method for testing leaf springs |
| KR101731885B1 (en) * | 2015-12-08 | 2017-05-08 | 대원강업주식회사 | Apparatus for testing spring constant of leaf spring |
| CN106323612A (en) * | 2016-08-22 | 2017-01-11 | 安徽江淮汽车股份有限公司 | Vertical force-bearing bench testing method for plate spring |
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