CN109506947B - Corner rotation loading device for fatigue strength test equipment of automobile seat framework - Google Patents
Corner rotation loading device for fatigue strength test equipment of automobile seat framework Download PDFInfo
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Abstract
The invention relates to a corner rotation loading device for fatigue strength test equipment of an automobile seat framework, wherein a test seat is fixedly connected and installed above a machine base through a seat installation platform, and a position detection sensor is installed on one side of the upper surface of the machine base through a support; the adjusting mechanism is fixedly connected to the other side of the upper surface of the machine base; the servo motor is arranged on an installation platform of the adjusting mechanism, and the electric servo motor is connected with an angle adjuster on the test seat framework through a speed reducer, a universal coupling and a rotating hand wheel; a torque sensor is connected between the speed reducer and the universal coupling and used for detecting load torque in real time, the servo motor is connected with the control system, and the control system controls the servo motor to drive the angle adjuster on the seat framework to rotate through the speed reducer, the universal coupling and the rotating hand wheel according to the detection standard requirement of the fatigue strength of the seat framework. The device can meet the detection requirements of fatigue strength test standards of related automobile seat frameworks of different types and sizes.
Description
Technical Field
The invention relates to a test device for testing fatigue strength of an automobile seat framework, in particular to a corner (angle adjuster) rotating and loading device for testing fatigue strength of various automobile front row seat frameworks in the automobile industry.
Background
The safety of automobile seats is classified as one of the most important indicators in the overall performance of automobiles by the global automobile industry. Since the car seat is not only a seating device but also a protection device, ensuring the safety of the car seat is an important task of designing and checking the car seat, and the fatigue strength of the seat frame is an important influence factor on the safety and life of the car seat. Therefore, the fatigue strength of the seat framework is a necessary safety performance detection index in the production and manufacturing processes of various automobile seats, is an important means for ensuring the product performance, improving the product quality and checking the product reliability, and the fatigue strength test of the newly developed seat product or the seat product produced on site cannot be carried out. The fatigue strength test of the automobile seat frame includes a fatigue strength test in which the automobile seat frame continuously rotates relative to the pelvis for ten thousand times at a constant rotational speed at a predetermined load between the backrest and the pelvis, and is an important test required for the fatigue test of the automobile seat.
The fatigue strength test of the automobile seat framework detects whether parts such as a backrest framework, a sitting basin framework, an angle adjuster and the like of the seat framework generate failure conditions such as insufficient strength, deformation and the like, insufficient welding strength of the whole seat, abnormal sound generated by the framework and the like in the production and use processes so as to ensure the safety of an automobile and the seat thereof in the operation process, ensure the personal and property safety of drivers and passengers, and provide technical parameter basis for the improvement design and the optimization structure of automobile parts.
The automobile industry in China is rapidly developed, the automobile keeping quantity is increased year by year, and new higher requirements are put forward on detection equipment of automobiles and related parts. Most of the detection equipment for the automobile seat in the current market is test equipment with complex structure, rich functions and higher technical requirements, so that the problems of inconvenient operation, insufficient adjustment and automatic compensation performance and the like of engineering technicians are caused. The field of automobile seat framework fatigue strength detection tests requires a method and equipment which are simple in structure and can fully meet the requirements of relevant seat test standards so as to meet the requirements of simple and convenient seat detection tests and wide adaptability to different types and sizes of seats.
Disclosure of Invention
The invention aims to provide a corner rotating loading device for automobile seat framework fatigue strength test equipment, which comprises a corner (angle adjuster) rotating fatigue detection control and position adjustment structure, and meets the detection requirements of fatigue strength test standards of related automobile seat frameworks of different types and sizes; the device can solve the problems of loading control and position adjustment of the seat framework in the prior art, which can continuously perform reciprocating relative rotation motion for ten thousand times at a certain rotating speed between the backrest and the pelvis under the action of specified load in the fatigue strength test of the seat framework of the automobile, and the like.
In order to achieve the purpose, the technical scheme of the invention is as follows: a corner rotation loading device for fatigue strength test equipment of an automobile seat framework comprises a base, a support, a seat mounting platform, a position detection sensor, a test seat, a rotating hand wheel, a universal coupling, a torque sensor, a servo motor, a speed reducer and an adjusting mechanism, wherein the test seat is fixedly connected and mounted above the base through the seat mounting platform, and the position detection sensor is mounted on one side of the upper surface of the base through the support; the adjusting mechanism is fixedly connected to the other side of the upper surface of the machine base; the servo motor is arranged on an installation platform of the adjusting mechanism, and the electric servo motor is connected with an angle adjuster on the test seat framework through a speed reducer, a universal coupling and a rotating hand wheel; the servo motor is connected with the control system, and the control system controls the servo motor to drive the angle adjuster on the seat framework to rotate through the speed reducer, the universal coupling and the rotating hand wheel according to the detection standard requirement of the fatigue strength of the seat framework, so as to drive the backrest framework to do forward and backward reciprocating relative rotation motion according to the requirement.
The adjusting mechanism consists of a longitudinal lifting mechanism and a transverse moving mechanism, and the transverse moving mechanism is fixedly arranged on the longitudinal lifting mechanism.
The longitudinal lifting mechanism comprises a basic platform, a middle regulator, a longitudinal adjusting rod system, an auxiliary platform and four groups of vibration reduction supporters. The base platform is connected with the auxiliary platform through a longitudinal adjusting rod system, and the longitudinal adjusting rod system is hinged with the base platform and the auxiliary platform through hinges; the four groups of vibration reduction supporters are arranged between the base platform and the auxiliary platform; the middle of the longitudinal adjusting rod system is provided with a middle adjuster, and the auxiliary platform is driven to ascend and descend by the forward and backward bidirectional rotation of the middle adjuster.
The transverse moving mechanism comprises a dovetail-shaped sliding block, a transverse adjusting rod system, a transverse moving side plate, a mounting platform, a middle adjuster, a transverse fixing side plate and a transverse moving slide rail. The transverse moving slide rail is connected with the mounting platform through a transverse moving side plate and a transverse fixing side plate, the upper end of the transverse moving side plate is fixedly connected with the mounting platform, the lower end of the transverse moving side plate is matched and slidably connected with the transverse moving slide rail through a dovetail-shaped slide block, the lower end of the transverse fixing side plate is fixedly connected with the transverse moving slide rail, and the upper end of the transverse fixing side plate is in contact connection with the mounting platform; the transverse moving side plate is connected with the transverse fixed side plate through a transverse adjusting rod system, and the transverse adjusting rod system is connected with the transverse moving side plate and the transverse fixed side plate through hinge structures; the middle of the transverse adjusting rod system is provided with a middle adjuster; the installation platform is driven to move left and right by the positive and negative bidirectional rotation of the middle regulator.
The middle adjuster consists of a left-handed screw, an adjusting column, a fastener, a fastening screw and a right-handed screw, wherein the adjusting column is provided with a long round hole for mounting the fastener and is cylindrical in shape, one side of the adjusting column is connected with the left-handed screw through a left-handed thread, the other side of the adjusting column is connected with the right-handed screw through a right-handed thread, and the left-handed screw and the right-handed screw are respectively connected with the fastener in the long round hole of the adjusting column and locked through the fastening screw; and rotating the adjusting column to enable the left-handed screw and the right-handed screw to simultaneously extend outwards or contract inwards.
The damping support consists of a mounting seat, an adjusting nut, a thrust ball bearing, a support guide post, a compression spring, a linear bearing block, a linear bearing and a support sleeve, wherein the support guide post is mounted on the mounting seat through the adjusting nut and the thrust ball bearing, the support guide post is connected with the support sleeve through the linear bearing block and the linear bearing, and the compression spring is connected between the linear bearing block at the lower end of the support sleeve and the upper end surface of the lower part of the support guide post.
The invention has the beneficial effects that:
the device can solve the problems that in the prior art, in the fatigue strength test of the automobile seat framework, the loading control of the back-and-forth relative rotation motion and the position adjustment of the seat framework under the action of specified load between the backrest and the pelvis are continuously carried out for ten thousand times at a certain rotating speed, and the like.
The device not only can be suitable for fatigue strength detection tests of the front seat framework of the automobile, but also can be suitable for fatigue life tests in the fields of folding equipment (such as folding bicycles, folding beds and folding seats) and the like, and can be popularized to most of fatigue strength test equipment which rotates or swings equipment or parts around a fixed shaft by configuring proper connecting parts and adjusting control parameters.
In the corner rotating loading device, two dimensions are used as main adjusting directions and one dimension is used as a secondary adjusting direction in a combined mode, so that the application of the device can meet the test requirements of seats or related parts with different sizes, and an ideal space test position requirement is met. The rotary loading device can be suitable for more extensive centering and position adjustment and other simple supporting occasions.
Drawings
FIG. 1 is a schematic structural diagram of a corner rotation loading device according to the present invention;
FIG. 2 is a schematic view of an adjusting mechanism;
FIG. 3 is a schematic view of the longitudinal (Z) lift mechanism in operation;
FIG. 4 is a schematic view of the operation state of the lateral (X) moving mechanism;
wherein: (a) an operating state, (b) a maximum movement state;
FIG. 5 is a schematic view of the longitudinal adjuster in two extreme operating states;
wherein: (a) a post-contraction state, (b) a post-extension state;
FIG. 6 is a schematic view of a mounting platform configuration;
FIG. 7 is a schematic view of a structure of a laterally movable slide rail;
wherein: (a) a front view, (b) a top view;
FIG. 8 is a schematic view of a vibration-damping support;
FIG. 9 is a schematic view of the mounting base structure;
wherein: (a) a front view, (b) a top view;
FIG. 10 is a schematic view of an adjusting nut;
wherein: (a) a front view, (b) a top view;
FIG. 11 is a schematic view of a support guide post structure;
FIG. 12 is a schematic view of a support sleeve construction;
FIG. 13 is a schematic view of four shock absorber mounting locations.
Detailed Description
The invention is further described with reference to the following figures and examples.
As shown in fig. 1, the corner rotation loading device of the present invention mainly comprises a machine base 1, a support 2, a seat mounting platform 3, a position detection sensor 4, a test seat 5, a rotating hand wheel 6, a universal coupling 7, a torque sensor 8, a servo motor 9, a speed reducer 10, an adjusting mechanism 11, etc. A plurality of T-shaped grooves are distributed on the base 1 and used for fixedly mounting components on the base. The seat mounting platform 3 is mounted above the machine base 1 through bolt connection. The test seat 5 is mounted above the seat mounting platform 3 through a bolt connection. The position detection sensor 4 is mounted on the upper side of the machine base 1 through a bracket 2. The adjusting mechanism 11 is installed on the other side of the upper surface of the machine base 1 through bolt connection. The servo motor 9 is arranged on an installation platform of the adjusting mechanism 11, and the electric servo motor 9 is connected with the test seat 5 through a speed reducer 10, a universal coupling 7 and a rotating hand wheel 6. The torque sensor 8 may display the measured movement torque.
According to the requirement of the detection standard of the fatigue strength of the seat framework, the servo motor 9 drives the angle adjuster on the seat framework to rotate through the speed reducer 10, the universal coupling 7 and the rotating hand wheel 6 under the instruction of the control system, so as to drive the backrest framework to do forward and reverse reciprocating relative rotation motion according to a certain requirement. The decelerator 10 reduces the rotation speed of the servo motor 9 to a rotation speed that meets the detection test standard and increases the output torque. The universal coupling 7 is used for connecting the speed reducer 8 and the rotating hand wheel 6. The torque sensor 8 is used to detect the load torque in real time.
As shown in fig. 2, the adjusting mechanism 11 is composed of a longitudinal elevating mechanism and a lateral moving mechanism. The transverse moving mechanism is fixedly arranged on the longitudinal lifting mechanism.
As shown in FIG. 3, the longitudinal (Z) lifting mechanism comprises a base platform 11-1, a longitudinal adjuster 11-2, a longitudinal adjusting rod system 11-3, an auxiliary platform 11-11 and four groups of vibration reduction supporters 11-12. The basic platform 11-1 and the auxiliary platform 11-11 are connected through a longitudinal adjusting rod system 11-3, and the longitudinal adjusting rod system 11-3 is hinged with the basic platform 11-1 and the auxiliary platform 11-11 through hinges. Four groups of damping supporters 11-12 are arranged between the basic platform 11-1 and the auxiliary platform 11-11. The middle of the longitudinal adjusting rod system 11-3 is provided with a longitudinal adjuster 11-2.
As shown in FIG. 4, the transverse moving mechanism comprises a dovetail-shaped sliding block 11-4, a transverse adjusting rod system 11-5, a transverse moving side plate 11-6, a mounting platform 11-7, a transverse adjuster 11-8, a transverse fixing side plate 11-9 and a transverse moving slide rail 11-10. The transverse moving slide rail 11-10 is connected with the mounting platform 11-7 through a transverse moving side plate 11-6 and a transverse fixing side plate 11-9, the upper end of the transverse moving side plate 11-6 is fixedly connected with the mounting platform 11-7, the lower end of the transverse moving side plate is in matched sliding connection with the transverse moving slide rail 11-10 through a dovetail-shaped slide block 11-4, the lower end of the transverse fixing side plate 11-9 is fixedly connected with the transverse moving slide rail 11-10, and the upper end of the transverse fixing side plate is in contact connection with the mounting platform 11-7; the transverse moving side plate 11-6 is connected with the transverse fixed side plate 11-9 through a transverse adjusting rod system 11-5, and a transverse regulator 11-8 is arranged in the middle of the transverse adjusting rod system 11-5. The connection between the transverse adjusting rod system 11-5 and the transverse moving side plate 11-6 and the transverse fixed side plate 11-9 adopts a hinge structure. The operation state of the lateral movement mechanism is shown in fig. 4(a), and the maximum movement amount is shown in fig. 4 (b).
Each part of the corner rotating and loading device has the functions and effects that:
the adjusting mechanism 11 can meet the detection position requirements of different sizes and different types of seat test pieces. The adjusting mechanism is divided into a longitudinal (Z) lifting mechanism and a transverse (X) moving mechanism, as shown in figure 2. The longitudinal (Z) lifting mechanism (as shown in fig. 3) is used for adapting to the requirement of adjusting the central height of the corner rotation loading device and the automobile seat frame angle adjuster, and the longitudinal (Z) lifting mechanism drives the auxiliary platform to ascend and descend through the forward and reverse bidirectional rotation of the middle adjuster 2. The transverse (X) moving mechanism (as shown in fig. 4) drives the mounting platform to move left and right through the forward and reverse bidirectional rotation of the intermediate regulator 8, so as to meet the requirement of adjusting the position of the corner rotation loading device and the X direction of the automobile seat frame angle adjuster.
The characteristics and the effects of each part in the adjusting mechanism 11 are as follows:
1) a base platform for mounting and supporting the components;
2) longitudinal (Z) adjuster (as shown in fig. 5) -consisting of a left-handed screw 21, an adjusting post 22, a fastener 23, a fastening screw 24, a right-handed screw 25, etc. Used for adjusting the vertical position movement of the longitudinal lifting mechanism. The adjusting column 22 is of an internal thread structure, one side of the adjusting column is provided with left-hand threads, the other side of the adjusting column is provided with right-hand threads, and the shape of the adjusting column is cylindrical. Which is provided with an oblong hole for mounting a fastener 23. One side of the adjusting column 22 is connected with a left-handed screw 21 through left-handed threads, the other side of the adjusting column is connected with a right-handed screw 25 through right-handed threads, and the left-handed screw 21 and the right-handed screw 25 are respectively connected with a fastening piece 23 in a long round hole of the adjusting column and locked through a fastening screw 24. When the adjusting device works, the fastening screw 24 on the fastening piece 23 is unscrewed, the adjusting column 22 is rotated, and the two threaded rod pieces connected with the adjusting column 22 are respectively provided with left-handed threads and right-handed threads which are matched with the inner threads of the adjusting column 22. The head of the threaded rod is an unthreaded round rod and is a fastening part. When the lifting device works, the adjusting column 22 is rotated, and the two threaded rod pieces connected with the adjusting column 22 extend outwards at the same time as shown in fig. 5(b) or contract inwards as shown in fig. 5(a), so that the vertical position of the longitudinal lifting mechanism is driven to move;
3) a longitudinal adjustment linkage-for adjusting the longitudinal position of the longitudinal movement mechanism in cooperation with the longitudinal adjuster.
4) The dovetail-shaped sliding block is connected with the transverse moving side plate through a screw, is arranged in a dovetail groove of the transverse moving slide rail, and transversely moves along the transverse moving slide rail together with the transverse moving side plate.
5) The transverse adjusting rod system is arranged on the vertical central planes of the transverse moving side plate and the transverse fixed side plate and is used for adjusting the transverse position of the transverse moving mechanism in cooperation with the transverse adjuster.
6) The lateral moving side plate moves laterally along with the lateral adjusting rod system and drives the mounting platform to move laterally. A dovetail-shaped sliding block is arranged below the transverse moving side plate.
7) A mounting platform (shown in FIG. 6), wherein a mounting area C is used for mounting a servo motor (a speed reducer), a torque sensor and the like; the round hole A is connected with the transverse moving side plate, the round hole B is connected with the transverse fixing side plate, and the length of the round hole is the transverse adjusting distance;
8) and the transverse adjuster is used for adjusting the transverse position movement of the transverse moving mechanism. The structure is the same as that of the longitudinal regulator;
9) a lateral fixed side plate for fixing and limiting the non-moving side of the lateral moving mechanism;
10) the transverse moving slide rail (as shown in fig. 7(a) and (b)) is of a dovetail groove structure, has the characteristics of high motion precision, good rigidity and good stability, and can stably guide and support the mechanism. The transverse moving slide rail is connected with the auxiliary platform through a bolt, a bolt hole on one side of the transverse moving slide rail is an oblong hole, so that the arrangement direction of the slide rail can be subjected to certain angle eccentric adjustment along the moving direction, and the requirement on centering of the rotating central axis of a seat test specimen and the rotating central axis of a servo motor (reducer) is met;
11) an auxiliary platform for mounting and supporting the components associated with the lateral movement mechanism;
12) the vibration reduction support (as shown in figure 8) supports the auxiliary platform and all relevant parts mounted on the auxiliary platform, reduces and reduces vibration generated during rotation caused by mounting errors and the like, and improves the stability of test operation.
The vibration reduction support 11-12 is composed of a mounting seat 31, an adjusting nut 32, a thrust ball bearing 33, a support guide column 34, a compression spring 35, a linear bearing block 36, a linear bearing 37, a support sleeve 38 and the like. The upper surface of the mounting seat 31 is provided with a support guide post 34 through an adjusting nut 32 and a thrust ball bearing 33, the support guide post 34 is connected with a support sleeve 38 through a linear bearing block 36 and a linear bearing 37, and a compression spring 35 is connected between the linear bearing block 36 at the lower end of the support sleeve 38 and the upper end surface of the lower part of the support guide post 34.
1) The mounting seat is used for mounting and fixing the shock absorption support on the foundation platform and supporting parts such as a guide post, a compression spring and the like thereon, and is shown in fig. 9(a), (b);
2) an adjusting nut for adjusting the working state of the compression spring and adjusting the height of the longitudinal position of the shock-absorbing support, see fig. 10(a), (b);
3) the thrust ball bearing bears axial force, reduces friction between the adjusting nut and the support guide post, and facilitates position adjustment of the adjusting nut.
4) Support guide posts-longitudinal position movement guides for the vibration-damping support, see fig. 11;
5) the compression spring mainly plays a role in absorbing vibration and buffering. The adjusting rod system connects the basic platform and the auxiliary platform, the longitudinal height of the adjusting rod system is always shorter than the length of the vibration reduction supporter when no load exists, and the compression spring is always in a compression state and keeps a certain pretightening force by adjusting the adjusting nut, so that the vibration absorption, the buffering and the supporting are realized.
6) The linear bearing block is used for fixing and positioning the linear bearing;
7) the linear bearing is used for guiding the support guide post to stably move up and down so as to reduce friction;
8) support sleeve-longitudinal movement space for installing linear bearings and solidifying support guide posts, see fig. 12;
the working principle of the vibration reduction support device is as follows:
longitudinal (Z-direction) position adjustment, vibration damping and support:
four sets of vibration-damping supporters 11-12 are distributed diagonally and symmetrically (see fig. 13), and the longitudinal adjusting rod is positioned at the middle position D of the base platform. The lower end surface of the adjusting nut is initially positioned at the lower end of the threaded portion of the mounting seat.
The longitudinal (Z-direction) lifting mechanism ascends or descends, and is locked by adjusting a longitudinal adjuster to a proper height position; and adjusting an adjusting nut in the vibration reduction support to enable a compression spring in the vibration reduction support to bear load and keep certain pre-pressure, and simultaneously eliminate a gap existing in the longitudinal lifting mechanism. The vibration reduction supporter is in a working state.
When the angular rotation loading device and a test object are mounted in a non-neutral mode to generate unbalance loading and vibration during working, because the structural design that the overall rigidity of the longitudinal (Z direction) lifting mechanism in the Z direction is far lower than that of the vibration reduction support device is adopted in the design, the load, vibration or unbalance loading borne by all the longitudinal (Z direction) lifting mechanisms is borne by compression springs in the vibration reduction support device, good vibration reduction and following are achieved, the angular rotation loading device is always in a good working state, and the stability of the load is kept.
In order to prevent the compression spring from changing in performance in the long-term use process, the adjusting nut can be adjusted and corrected according to the situation, and the pre-pressure of the compression spring is improved or reduced.
The four vibration reduction supporters can enable the whole rotation angle rotation loading device to be more stably supported, so that the working stability and reliability of the rotation angle rotation loading device are improved.
The linear bearing is arranged, so that the good integrity and following performance of the whole support in working can be guaranteed, and the working resistance of the longitudinal lifting mechanism in adjustment can be reduced.
Adjusting the position of a transverse (X-direction) moving mechanism:
the transverse (X-direction) moving mechanism consists of a transverse moving slide rail, a transverse adjusting rod system, a transverse adjuster, a mounting platform, a transverse moving side plate, a dovetail-shaped slide block, a transverse fixing side plate and the like. At the initial stage of adjustment, the connection between the transverse fixed side plate and the auxiliary platform is kept, and the connecting screw between the transverse fixed side plate and the mounting platform is loosened; the transverse moving side plate is kept fastened with a connecting bolt of the mounting platform, a transverse regulator is adjusted, and the transverse moving side plate, the dovetail-shaped sliding block, the mounting platform and the like are driven by a transverse adjusting rod system to synchronously move; the transverse adjusting rod system extends forwards or retracts backwards along the guide direction of the transverse moving slide rail, the arrangement direction of the transverse moving slide rail can be slightly eccentric by an angle along the moving direction so as to adapt to the deviation of the axis of the test installation of the seat test piece, and all connecting bolts of the transverse moving mechanism are locked after being adjusted to a proper position.
A position detection device is arranged at a relevant position of the test seat, and once the device acts wrongly or the test seat is excessively deformed, if the rotation angle of the test seat exceeds the specification and the like, an alarm is given immediately and an instruction is given to stop the whole test device. Meanwhile, when a person enters a certain position in the test area, a warning signal is also given, so that the test process is prevented from being influenced or generating a safety problem.
The working principle of the corner rotating loading device is as follows:
after the seat to be tested is installed and fixed, the transverse (X) moving mechanism performs initial adjustment on the position and the central axis, after the seat reaches a specified position, the longitudinal (Z) adjuster in the mechanism is adjusted, the longitudinal lifting mechanism ascends or descends, and the longitudinal adjuster is adjusted to a proper position and locked. And adjusting the adjuster and the transverse moving slide rail in the transverse moving mechanism again to enable the rotation center of the corner rotating loading device to correspond to the center of the angle adjuster in the test seat, and locking the related fixing bolt. The working position of the corner rotating loading device in the Y direction is directly adjusted and determined when the device is installed on the base platform.
A servo motor of the lower rotating angle loading device is controlled by a control system to apply torque through a speed reducer, a coupling, a torque sensor and other components, and real-time detection is carried out on the load torque of the test seat. The servo motor drives the test seat to complete specified reciprocating forward and reverse rotation actions at a certain rotating speed according to the requirements of test programs until the cycle times required by the test are reached. Because the rigidity of the vibration reduction support and the rigidity of the longitudinal lifting mechanism are different, once unbalance loading and vibration caused by the unequal installation of the corner rotation loading device and the test object occur during working, the load and the vibration or the unbalance loading borne by all the longitudinal (Z-direction) lifting mechanisms are borne by compression springs in the vibration reduction support, good vibration reduction and following are realized, the corner rotation loading device is always in a good working state, and the stability of the load is kept.
The corner rotation loading device of the invention is characterized in that:
1) the corner rotating and loading device can realize X, Y, Z position adjustment in the three-dimensional coordinate direction;
2) the corner rotating loading device can realize quick and convenient position adjustment and control the motion of the test seat, and has enough position adjustment range to adapt to the test space requirements of the fatigue strength of the automobile seats of different types and sizes;
3) the adopted longitudinal and transverse regulators are in threaded adjustment structures, so that the adjustment position can be accurate;
4) the thrust ball bearing is used for connecting the longitudinal guide post and the adjusting nut, can bear the downward axial force of the adjusting device, reduces the friction between the adjusting nut and the supporting guide post, and facilitates the position adjustment of the adjusting nut.
5) The longitudinal lifting mechanism adopts structural combinations with different rigidities, and once unbalance loading and vibration caused by unequal factors of installation of the corner rotation loading device and a test object occur during work, the load and the vibration or the unbalance loading borne by all the longitudinal (Z-direction) lifting mechanisms are borne by the compression springs in the vibration damping support at the moment, good vibration damping and following are realized, the corner rotation loading device is always in a good working state, and the stability of the load is kept.
6) The arrangement direction of the transverse moving slide rail can be adjusted in a certain angle eccentricity way along the moving direction so as to adapt to the installation centering eccentricity of a test specimen, thereby realizing the adjustment of the transverse moving mechanism in the position and direction;
7) the transverse moving rod system is positioned on the vertical central plane of the transverse moving side plate and the transverse fixing side plate, one end (right) of the transverse moving rod system is fixed, and the other end (left) of the transverse moving rod system drives the transverse moving side plate to realize parallel movement, so that the accuracy of adjusting the position is ensured.
8) The four vibration reduction support device combinations are designed, so that the whole rotary loading system is more stably supported, and the working stability and reliability of the corner rotary loading device are improved;
9) the arrangement of the linear bearing in the vibration reduction support can ensure good following performance in work and reduce the working resistance in the adjustment of the longitudinal lifting mechanism;
10) a position detection device is arranged at a relevant position of the test seat, and once the device acts wrongly or the test seat excessively deforms, an alarm is given immediately and an instruction is given to stop the whole test device; meanwhile, when a person enters a certain position in the test area, a warning signal is also given, so that the test process is prevented from being influenced or generating a safety problem, and the multifunctional test bed has multiple functions.
11) The corner rotation loading device is composed of parts such as a servo motor, a coupler, a speed reducer, a torque sensor, a platform and an adjusting mechanism, control and position adjustment of reciprocating relative rotation movement between the backrest and the pelvis for thousands of times under the action of specified loads at a certain rotating speed can be completed according to control instructions in the test process, and the detection requirements of fatigue strength test standards of related automobile seat frameworks of different types and sizes are met.
12) Other test subjects than car seats can be completed.
Claims (6)
1. The utility model provides a rotatory loading device of corner for car seat skeleton fatigue strength test equipment, includes frame, support, seat mounting platform, position detection sensor, experimental seat, rotates hand wheel, universal joint, torque sensor, servo motor, reduction gear, guiding mechanism, its characterized in that: the test seat is fixedly connected and installed above the base through a seat installation platform, and the position detection sensor is installed on one side of the upper surface of the base through a support; the adjusting mechanism is fixedly connected to the other side of the upper surface of the machine base; the adjusting mechanism is internally provided with a vibration damping support, the vibration damping support consists of a mounting seat, an adjusting nut, a thrust ball bearing, a support guide post, a compression spring, a linear bearing block, a linear bearing and a support sleeve, the support guide post is mounted on the mounting seat through the adjusting nut and the thrust ball bearing, the support guide post is connected with the support sleeve through the linear bearing block and the linear bearing, and the compression spring is connected between the linear bearing block at the lower end of the support sleeve and the upper end surface of the lower part of the support guide post; the servo motor is arranged on an installation platform of the adjusting mechanism and is connected with an angle adjuster on the test seat framework through a speed reducer, a universal coupling and a rotating hand wheel; the servo motor is connected with the control system, and the control system controls the servo motor to drive the angle adjuster on the seat framework to rotate through the speed reducer, the universal coupling and the rotating hand wheel according to the detection standard requirement of the fatigue strength of the seat framework, so as to drive the backrest framework to do forward and backward reciprocating relative rotation motion according to the requirement.
2. The corner rotation loading device for the fatigue strength test equipment of the automobile seat frame according to claim 1, characterized in that: the adjusting mechanism consists of a longitudinal lifting mechanism and a transverse moving mechanism, and the transverse moving mechanism is fixedly arranged on the longitudinal lifting mechanism.
3. The corner rotation loading device for the fatigue strength test equipment of the automobile seat frame according to claim 2, characterized in that: the longitudinal lifting mechanism comprises a basic platform, a middle regulator, a longitudinal adjusting rod system, an auxiliary platform and four groups of vibration reduction supporters, wherein the basic platform is connected with the auxiliary platform through the longitudinal adjusting rod system, and the longitudinal adjusting rod system is hinged with the basic platform and the auxiliary platform through hinges; the four groups of vibration reduction supporters are arranged between the base platform and the auxiliary platform; the middle of the longitudinal adjusting rod system is provided with a middle adjuster, and the auxiliary platform is driven to ascend and descend by the forward and backward bidirectional rotation of the middle adjuster.
4. The corner rotation loading device for the fatigue strength test equipment of the automobile seat frame according to claim 3, characterized in that: the four groups of vibration reduction supporters are symmetrically distributed in the diagonal direction, and the longitudinal adjusting rod is positioned in the middle of the base platform.
5. The corner rotation loading device for the fatigue strength test equipment of the automobile seat frame according to claim 2, characterized in that: the transverse moving mechanism comprises a dovetail-shaped sliding block, a transverse adjusting rod system, a transverse moving side plate, an installation platform, a middle regulator, a transverse fixing side plate and a transverse moving sliding rail, the transverse moving sliding rail is connected with the installation platform through the transverse moving side plate and the transverse fixing side plate, the upper end of the transverse moving side plate is fixedly connected with the installation platform, the lower end of the transverse moving side plate is matched and slidably connected with the transverse moving sliding rail through the dovetail-shaped sliding block, the lower end of the transverse fixing side plate is fixedly connected with the transverse moving sliding rail, and the upper end of the transverse fixing side plate is in contact connection; the transverse moving side plate is connected with the transverse fixed side plate through a transverse adjusting rod system, and the transverse adjusting rod system is connected with the transverse moving side plate and the transverse fixed side plate through hinge structures; the middle of the transverse adjusting rod system is provided with a middle adjuster; the installation platform is driven to move left and right by the positive and negative bidirectional rotation of the middle regulator.
6. The corner rotation loading device for the fatigue strength test equipment of the automobile seat frame according to claim 3 or 5, characterized in that: the middle adjuster consists of a left-handed screw, an adjusting column, a fastener, a fastening screw and a right-handed screw, wherein the adjusting column is provided with a long round hole for mounting the fastener and is cylindrical in shape, one side of the adjusting column is connected with the left-handed screw through a left-handed thread, the other side of the adjusting column is connected with the right-handed screw through a right-handed thread, and the left-handed screw and the right-handed screw are respectively connected with the fastener in the long round hole of the adjusting column and locked through the fastening screw; and rotating the adjusting column to enable the left-handed screw and the right-handed screw to simultaneously extend outwards or contract inwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811248108.7A CN109506947B (en) | 2018-10-25 | 2018-10-25 | Corner rotation loading device for fatigue strength test equipment of automobile seat framework |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811248108.7A CN109506947B (en) | 2018-10-25 | 2018-10-25 | Corner rotation loading device for fatigue strength test equipment of automobile seat framework |
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| CN109506947A CN109506947A (en) | 2019-03-22 |
| CN109506947B true CN109506947B (en) | 2021-05-11 |
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| CN201811248108.7A Active CN109506947B (en) | 2018-10-25 | 2018-10-25 | Corner rotation loading device for fatigue strength test equipment of automobile seat framework |
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| CN113173227B (en) * | 2021-04-30 | 2023-07-25 | 中船黄埔文冲船舶有限公司 | Test method of turning plate bed |
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| KR100976763B1 (en) * | 2008-08-18 | 2010-08-18 | (주) 신형엔지니어링 | A tester for height adjustment device of car seat |
| CN100585354C (en) * | 2008-10-30 | 2010-01-27 | 上海应用技术学院 | Torque detection device for automobile seat angle adjuster |
| CN202433132U (en) * | 2011-12-08 | 2012-09-12 | 佛吉亚(上海)管理有限公司 | Height adjusting torque automatic test device of height adjustor for seat basin framework of automobile seat |
| CN204301904U (en) * | 2014-12-25 | 2015-04-29 | 重庆延锋江森汽车部件系统有限公司 | Angle regulating device for seat of vehicle reverberation matrix method testing arrangement |
| CN106735499B (en) * | 2016-12-13 | 2018-11-06 | 重庆市鹏舟机械厂 | Lath cutter |
| CN108458168B (en) * | 2018-03-20 | 2023-08-25 | 华中科技大学 | Intelligent constant force vibration reduction support |
| CN108458034B (en) * | 2018-03-20 | 2024-04-19 | 华中科技大学 | Load-adjustable metal zero-stiffness vibration isolator |
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