CN113358385A - Fatigue test system and method for seat multi-linkage mechanism - Google Patents
Fatigue test system and method for seat multi-linkage mechanism Download PDFInfo
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- CN113358385A CN113358385A CN202110523584.0A CN202110523584A CN113358385A CN 113358385 A CN113358385 A CN 113358385A CN 202110523584 A CN202110523584 A CN 202110523584A CN 113358385 A CN113358385 A CN 113358385A
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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- G01M99/001—Testing of furniture, e.g. seats or mattresses
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Abstract
The invention discloses a fatigue test system and a test method for a seat multi-linkage mechanism. The multi-linkage mechanism is a core component of the novel comfortable health seat. Due to the lack of a multi-linkage fatigue test method and system, the quality of multi-linkage mechanisms produced by a plurality of manufacturers is different. The test system comprises a base, two backrest headrest combined test mechanisms and two chair leg test mechanisms, wherein the two backrest headrest combined test mechanisms and the two chair leg test mechanisms are installed on the base. The combined test mechanism for the backrest and the headrest comprises a first mounting seat and a combined swinging assembly. The joint swing assembly includes a first swing frame, a backrest swing jaw, and a headrest swing jaw. The leg test mechanism includes a second mount and a leg swing assembly. The chair leg swinging component comprises a second swinging frame and a chair leg swinging claw. According to the invention, the bottom of the backrest, the headrest and the tops of the chair legs of the chair are shaken in a reciprocating manner, so that an accelerated test of a chair fatigue test is realized, and the fatigue performance of the chair after long-time use can be rapidly obtained.
Description
Technical Field
The invention belongs to the technical field of intelligent manufacturing, and particularly relates to a method and a system for testing fatigue of a multi-linkage mechanism of a seat for designing and manufacturing seats in the chair industry, which fill the blank of the conventional multi-linkage mechanism fatigue test technology.
Background
The multi-linkage mechanism is a core component of a novel comfortable health seat, and various seat back linkage mechanisms are published on the market. Due to the lack of a fatigue test method and a fatigue test system for multiple linkage mechanisms, the quality of the multiple linkage mechanisms produced by a plurality of manufacturers is different, and the method is mainly shown in the following steps: the stress concentration causes the local premature damage of the mechanism, the uneven stress causes serious or eccentric wear, the improper design and material selection causes the over-deformation and even breakage of the mechanism, and the like. In addition, the design standard of a multi-linkage mechanism for the novel comfortable health seat is lacked, and the high-quality development process of an enterprise is influenced. Therefore, chair manufacturing enterprises urgently need a fatigue test method and a fatigue test system for a multi-linkage mechanism of a chair, so that the design and manufacturing level of the enterprises is improved on one hand, and the quality of novel chairs is improved on the other hand.
Disclosure of Invention
The invention aims to provide a fatigue test method and a fatigue test system for a multi-linkage mechanism of a seat.
The invention discloses a fatigue test system for a seat multi-linkage mechanism, which comprises a base, two backrest and headrest combined test mechanisms and two chair leg test mechanisms, wherein the two backrest and headrest combined test mechanisms and the two chair leg test mechanisms are arranged on the base. The combined test mechanism for the backrest and the headrest comprises a first mounting seat and a combined swinging assembly. The joint swinging assembly is arranged on one side of the top of the first mounting seat. The joint swing components in the two chair leg testing mechanisms are arranged oppositely. The combined swinging assembly comprises a first swinging frame, a backrest swinging claw and a headrest swinging claw. The first swinging frame is rotatably connected to the first mounting seat and is driven to rotate by a power element. The backrest swinging clamping jaw is installed on the outer side surface of the backrest swinging block and deviates from the rotating axis of the first swinging frame and the first installation seat. The backrest swinging clamping jaw is installed on the outer side surface of the backrest swinging block and deviates from the rotating axis of the first swinging frame and the first installation seat. The headrest swinging claw is arranged on the outer side surface of the backrest swinging block and is arranged at an interval with the backrest swinging claw. The headrest swinging claw is driven by a power element to swing.
The chair leg testing mechanism comprises a second mounting seat and a chair leg swinging assembly. The chair leg swinging component is arranged on one side of the top of the second mounting seat. The chair leg swinging components in the two backrest headrest joint testing mechanisms are arranged oppositely. The chair leg swinging component comprises a second swinging frame and a chair leg swinging claw. The second swinging frame is rotatably connected to the second mounting seat and is driven to rotate by the power element. The chair leg swinging clamping jaw is arranged on the outer side surface of the chair leg swinging block and deviates from the rotating axis of the second swinging frame and the second mounting seat.
Preferably, the base is provided with a clamp for fixing the tested seat. The positions of the backrest and headrest combined testing mechanism and the chair leg testing mechanism on the base can be adjusted.
Preferably, the first swing frame is mounted on the first mounting seat through a first mounting driving assembly. The first installation driving assembly comprises a first swinging shaft, a first bearing, a first flat key and a backrest swinging motor. The first swinging shaft is supported on the top of the first mounting seat through a first bearing. The first swing shaft is driven to rotate by a backrest swing motor. The bottom of the backrest swing block is connected with the first swing shaft through a first flat key. The backrest swinging claw comprises two backrest clamping arms arranged at intervals. The symmetry planes of the two backrest clamping arms pass through the rotation axes of the swing frame and the first mounting seat. The distance between the two backrest clamping arms is adjusted by installing cushion blocks with different thicknesses on the inner sides of the backrest clamping arms or sleeving outer sleeves with different sizes on the backrest clamping arms.
Preferably, the headrest swing claw is mounted on the first swing frame through a first mounting driving assembly. The second mounting driving assembly comprises a headrest swinging motor, a second bearing and a second swinging shaft. The second swing shaft is supported on the first swing frame via a second bearing. The second swing shaft is driven to rotate by a headrest swing motor. The outer end of the second swing shaft is eccentrically fixed with a headrest swing claw. The headrest swing claw comprises a connecting part and two headrest clamping arms which are fixed on the connecting part and arranged at intervals. The symmetry planes of the two headrest clamping arms pass through the axis of the second swinging shaft. The distance between the two headrest clamping arms is adjusted by mounting cushion blocks with different thicknesses on the inner sides of the headrest clamping arms or sleeving jackets with different sizes on the headrest clamping arms.
Preferably, the joint swing assembly further comprises a backrest loading assembly. The backrest loading assembly is installed on the outer side of the first swing frame and is positioned between the backrest swing claw and the headrest swing claw. The backrest loading assembly comprises a backrest loading cylinder and a backrest loading clamp. The cylinder body of the backrest loading cylinder which is vertically arranged is fixed with the outer side surface of the first swing frame. And a backrest loading clamp is arranged at the outer end of the piston rod of the backrest loading cylinder. The back loading clamp is capable of clamping a back of the seat.
The chair leg swinging assembly also comprises a chair leg loading assembly. The chair leg loading assembly is arranged on the outer side of the second swinging frame. The chair leg loading assembly comprises a chair leg loading cylinder and a chair leg loading clamp. The cylinder body of the vertically arranged chair leg loading cylinder is fixed with the outer side surface of the second swing frame. A chair leg loading clamp is arranged at the outer end of the piston rod of the chair leg loading cylinder. The leg loading clamp can clamp the legs.
Preferably, the first swing frame comprises a backrest swing block, a first position adjusting frame and a second fixing screw rod. The first position adjusting frame is arranged at the top of the backrest swinging block through a second fixing screw rod and is adjustable in position. The backrest swinging claw is arranged on the backrest swinging block. The headrest swinging claw is arranged on the first position adjusting frame.
Preferably, the second swing frame is mounted on the second mounting seat through a third mounting driving assembly. The third installation driving component comprises a second swinging shaft, a third bearing, a second flat key and a chair leg swinging motor. The second swing shaft is supported on the second mount via a third bearing. The second swinging shaft is driven to rotate by the chair leg swinging motor. The top of the chair leg swinging block is connected with the second swinging shaft through a second flat key. The chair leg swing claw comprises two chair leg clamping arms arranged at intervals. The symmetry plane of the two chair leg clamping arms passes through the axis of the second swinging shaft. The distance between the two chair leg clamping arms is adjusted by installing cushion blocks with different thicknesses on the inner sides of the chair leg clamping arms or sleeving outer sleeves with different sizes on the chair leg clamping arms.
Preferably, the second swing frame comprises a chair leg swing block, a second position adjusting frame and a fourth fixing screw rod. The second position adjusting frame is arranged at the top of the chair leg swinging block through a fourth fixing screw rod. A plurality of fourth mounting holes are formed in the top of the chair leg swinging block, the fourth mounting holes are sequentially arranged from top to bottom, and the fourth fixing screw penetrates through different fourth mounting holes to adjust the position of the second position adjusting frame. The chair leg swinging claw is arranged on the chair leg swinging block. The chair leg loading assembly is arranged on the second position adjusting frame.
Preferably, the first mounting seat comprises a first supporting seat, a first fixing screw, a first bracket and a first connecting plate. Two first supporting seats which are arranged side by side and at intervals are fixed on the base. First supports are installed on the two first supporting seats through first fixing screw rods. A plurality of first mounting holes are formed in the first supporting seat and are sequentially arranged from top to bottom. The height of the first support is adjusted by passing the first fixing screw through different first mounting holes.
The second mounting seat comprises a second supporting seat, a third fixing screw rod, a second support and a second connecting plate. Two second supporting seats which are arranged side by side and at intervals are fixed on the base. And the two second supporting seats are provided with second supports through third fixing screw rods. A plurality of third mounting holes are formed in the second supporting seat and are sequentially arranged from top to bottom, and the position of the second support is adjusted in a mode that the third fixing screw penetrates through different third mounting holes.
The test method of the fatigue test system of the seat multi-linkage mechanism comprises the following specific steps:
fixing the tested seat on the base, aligning the rotation axis of the first swing frame with the joint of the backrest and the seat surface of the tested seat, and aligning the second swing frame with the joint of the front legs and the seat surface of the tested seat.
And secondly, rotating the first swing frame to be aligned with the backrest of the tested seat. The second swing frame is rotated to a state of being aligned with the front leg. And clamping the bottom of the tested seat back by using the back swinging claw. And (3) clamping the headrest of the tested seat by using the headrest swinging clamping claw. And clamping the middle part of the backrest of the tested seat by using a backrest loading clamp. The swing claw of the chair leg is used for clamping the top of the front chair leg of the tested seat. And clamping the front chair leg of the tested seat by using the chair leg loading clamp.
And thirdly, ventilating a backrest loading cylinder to enable the backrest loading clamp to apply lifting force to the tested seat backrest. The chair leg loading cylinder is ventilated, so that the chair leg swinging clamping claw exerts an upward lifting force on the front chair leg of the tested seat
And fourthly, carrying out forward and reverse reciprocating swing on the backrest swing claw, the headrest swing claw and the chair leg swing claw, and respectively testing the backrest, the headrest and the front chair leg of the tested seat.
And step five, after the preset swinging times or duration is reached, separating the tested seat from the two backrest headrest combined testing mechanisms and the two chair leg testing mechanisms, and detaching the base. And checking whether the tested seat is damaged or not.
The invention has the beneficial effects that:
1. the invention provides a fatigue test system and a method for a multi-linkage mechanism of a seat by designing a backrest and headrest combined test mechanism and a chair leg test mechanism, solves the technical problem of the fatigue test of the multi-linkage mechanism of the existing novel comfortable healthy seat, and can improve the design and manufacturing level of enterprises and the quality of the novel seat. Therefore, the method has remarkable economic, social and environmental benefits.
2. According to the invention, the bottom of the backrest, the headrest and the tops of the chair legs of the chair are shaken in a reciprocating manner, so that an accelerated test of a chair fatigue test is realized, and the fatigue performance of the chair after long-time use can be rapidly obtained.
3. The invention advances the progress of one-step fatigue test in a cylinder loading mode, and is beneficial to the large-batch fatigue performance test of the seat.
Drawings
FIG. 1 is a schematic view (top view) of the overall structure of the present invention;
FIG. 2 is a schematic view of the relative positions of the backrest headrest joint test mechanism and the leg rest test mechanism on the same side of the chair of the present invention (cross-sectional view taken along section A-A in FIG. 1);
FIG. 3 is a schematic view of a leg test mechanism of the present invention (cross-sectional view taken along section B-B in FIG. 1);
fig. 4 is a schematic view of a test mechanism of the present invention (cross-sectional view of section C-C in fig. 1).
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, a fatigue testing system for a seat multi-linkage mechanism comprises a base 1, and two backrest and headrest combined testing mechanisms i and two seat leg testing mechanisms ii which are installed on the base 1. The base 1 is installed and is the rectangle and arrange and position adjustable chair leg mounting fixture for fix the seat on base 1, avoid the seat to wholly take place to remove in the test procedure. The two backrest headrest joint testing mechanisms I arranged side by side and the two chair leg testing mechanisms II arranged side by side are arranged in a rectangular mode and are adjustable in position, so that the chair can adapt to seats of different sizes. The two backrest headrest joint testing mechanisms I are respectively used for carrying out fatigue testing on two front chair legs of the seat. And the two chair leg testing mechanisms II are respectively used for carrying out fatigue testing on two sides of the seat backrest.
As shown in fig. 2, 3 and 4, the combined testing mechanism i for the backrest and the headrest comprises a first mounting seat and a combined swinging component. And the joint swinging assembly is arranged on one side of the top of the first mounting seat and is used for swinging and lifting loading on a backrest and a headrest of the seat. The joint swinging assemblies in the two chair leg testing mechanisms II are oppositely arranged. The first mounting seat includes a first supporting seat 12, a first fixing screw 13, a first bracket 14, and a first connecting plate 27. Two first supporting seats 12 arranged side by side and at intervals are fixed on the base 1. The two first supporting seats 12 are respectively provided with a first bracket 14 through two first fixing screws 13, and the height of the first bracket 14 is adjustable. Specifically, the first supporting seat 12 is provided with a plurality of first mounting holes sequentially arranged from top to bottom, and the height of the first bracket 14 can be adjusted by passing the first fixing screw 13 through different first mounting holes. Both ends of the bottom surface of the first connecting plate 27 are fixed to the top ends of the two first brackets 14, respectively.
The joint swing assembly includes a first swing frame, a first mounting drive assembly, a back swing pawl 17, a back loading assembly, a second mounting drive assembly, and a head restraint swing pawl 23. The first mounting drive assembly includes the first swing shaft 16, the first bearing 31, the first flat key 32, and the backrest swing motor 25. Both ends of the first swing shaft 16 are supported by the two first brackets 14 through first bearings 31, respectively. The backrest swinging motor 25 is fixed to the top of one of the first brackets 14, and the output shaft is fixed coaxially with one end of the first swinging shaft 16. The first swing frame includes a backrest swing block 15, a first position adjustment frame 18, and a second set screw 19. The bottom of the backrest swing block 15 is connected with the other end of the first swing shaft 16 through a first flat key 32. The top end of the backrest swinging block 15 is provided with a mounting groove. The bottom end of the first position adjustment bracket 18 extends into the mounting recess. The first position adjusting frame 18 is mounted on the top of the backrest swing block 15 through two second fixing screws 19, and the height of the first position adjusting frame is adjustable. Specifically, a plurality of second mounting holes are formed in two sides of the mounting groove in the top of the backrest swing block 15, and the height of the first position adjusting frame 18 can be adjusted by passing a second fixing screw 19 through the different second mounting holes.
The backrest swing claw 17 is fixed to an outer side surface of the backrest swing block 15 and positioned above the first swing shaft 16. The backrest swinging claw 17 comprises two backrest clamping arms arranged at intervals. The plane of symmetry of the two backrest latch arms passes through the axis of the first pivot axis 16. The two backrest clamping arms are used for clamping the bottom of one side of the backrest. The distance between the two backrest clamping arms is adjusted in a mode that cushion blocks with different thicknesses are installed on the inner sides of the backrest clamping arms or sleeves with different sizes are sleeved on the backrest clamping arms, so that the backrest clamping arms are suitable for seat backings with different widths, and the swinging effect of the backrest is improved.
The second mount drive assembly includes the headrest swing motor 26, the second bearing 33, and the second swing shaft 22. The second pivot axis 22 is supported on the first position adjustment bracket 18 via a second bearing 33. A headrest swing motor 26 is fixed to the top of the first position adjustment bracket 18, and an output shaft is fixed to the inner end of the second swing shaft 22. A headrest swing claw 23 is eccentrically fixed to an outer end of the second swing shaft 22. The headrest swing claw 23 includes a connecting portion, and two headrest retaining arms fixed to the connecting portion and arranged at an interval. The connecting part is fixed with the second swinging shaft. The symmetry plane of the two headrest arms passes through the axis of the second swing shaft 22. The two headrest clamping arms are used for clamping the headrest at the top of the backrest. The distance between the two headrest clamping arms is adjusted in a mode that cushion blocks with different thicknesses are installed on the inner sides of the headrest clamping arms or jackets with different sizes are sleeved on the headrest clamping arms, so that the headrest clamping device is suitable for seat headrests with different widths, and the swinging effect on a backrest is improved.
The back loading assembly is mounted on the outside of the first position adjustment bracket 18 between the back swing pawl 17 and the headrest swing pawl 23. The back loading assembly includes a back loading cylinder 21 and a back loading fixture 20. The cylinder body of the vertically arranged backrest loading cylinder 21 is fixed with the outer side surface of the first position adjusting frame 18. A backrest loading clamp 20 is mounted at the outer end of the piston rod of the backrest loading cylinder 21. The backrest loading clamp 20 adopts an electric or manual clamping jaw (the clamping jaw belongs to the prior art, so the structure is not shown in detail in the figure), and can clamp the middle part of the seat backrest to apply a lifting loading force to the seat backrest by matching with the backrest loading cylinder 21.
And the chair leg testing mechanism II comprises a second mounting seat and a chair leg swinging assembly. The chair leg swinging assembly is installed on one side of the top of the second installation seat and used for swinging, lifting and loading the front chair leg of the chair. The second mounting seat comprises a second supporting seat 2, a third fixing screw rod 4, a second bracket 28 and a second connecting plate 11. Two second supporting seats 2 which are arranged side by side and at intervals are fixed on the base 1. The second supports 28 are mounted on the two second supporting seats 2 through the two third fixing screw rods 4, and the heights of the second supports 28 are adjustable. Specifically, a plurality of third mounting holes are formed in the second support seat 2, and the third fixing screw 4 penetrates through different third mounting holes, so that the height of the second support 28 can be adjusted. The two ends of the bottom surface of the second connecting plate 11 are fixed to the top ends of the two second brackets 28, respectively.
The chair leg swinging component comprises a second swinging frame, a third mounting driving component, a chair leg swinging claw 9 and a chair leg loading component. The third mounting drive assembly includes the second swing shaft 10, the third bearing 30, the second flat key 29 and the leg swing motor 24. Both ends of the second swing shaft 10 are supported by the two first brackets 28 via third bearings 30, respectively. The leg swing motor 24 is fixed to the top of one of the first brackets 28, and the output shaft is fixed coaxially with one end of the second swing shaft 10. The second swinging frame comprises a chair leg swinging block 8, a second position adjusting frame 3 and a fourth fixing screw 7. The top of the leg swing block 8 is connected to the other end of the second swing shaft 10 by a second flat key 29. The bottom of the chair leg swinging block 8 is provided with a mounting groove. The bottom end of the second position adjusting frame 3 extends into the mounting groove. The second position adjusting frame 3 is arranged at the top of the chair leg swinging block 8 through two fourth fixing screw rods 7, and the height of the second position adjusting frame is adjustable. Specifically, a plurality of fourth mounting holes are formed in two sides of the mounting groove in the top of the chair leg swing block 8, and the distance from the second position adjusting frame 3 to the second swing shaft 10 can be adjusted by passing the fourth fixing screw 7 through different fourth mounting holes.
The leg swing claw 9 is fixed on the outer side surface of the leg swing block 8 and is positioned on the lower side of the second swing shaft 10. The leg swing claw 9 includes two leg clamp arms arranged at intervals. The symmetry plane of the two leg catch arms passes through the axis of the second pivot axis 10. The two chair leg clamping arms are used for clamping the tops of the chair legs. The distance between the two chair leg clamping arms is adjusted by installing cushion blocks with different thicknesses on the inner sides of the chair leg clamping arms or sleeving jackets with different sizes on the chair leg clamping arms, so that the chair leg clamping device is suitable for chair legs with different widths, and the swinging effect of the chair legs is improved.
The chair leg loading component is arranged on the outer side of the second position adjusting frame 3 and is lower than the chair leg swinging claw 9. The leg loading assembly includes a leg loading cylinder 5 and a leg loading clamp 6. The cylinder body of the chair leg loading cylinder 5 which is vertically arranged is fixed with the outer side surface of the second position adjusting frame 3. A chair leg loading clamp 6 is arranged at the outer end of the piston rod of the chair leg loading cylinder 5. The chair leg loading clamp 6 adopts an electric or manual clamping jaw (the clamping jaw belongs to the prior art, so the structure is not shown in detail in the figure), can clamp the middle part of the chair leg of the chair, and is matched with the chair leg loading air cylinder 5 to apply lifting loading force to the chair leg of the chair.
The test method of the fatigue test system of the seat multi-linkage mechanism comprises the following specific steps:
adjusting the positions of the two backrest headrest combined testing mechanisms I and the two chair leg testing mechanisms II according to the size of the tested chair. The tested seat is fixed on the base 1, so that the two backrest headrest combined testing mechanisms I and the two chair leg testing mechanisms II are respectively positioned at four corners of the seat. The height of the first bracket 14 in the combined test mechanism i for a back rest and headrest is adjusted so that the first pivot axis 16 is aligned with the joint of the back and seat surfaces of the seat to be tested. The height of the second bracket 28 in the leg test mechanism ii is adjusted so that the second swing axis 10 is aligned with the joint of the front leg and the seat surface of the seat under test.
And step two, the backrest swinging motor 25 drives the first swinging shaft 16 to rotate, so that the inclination angle of the first swinging frame is the same as that of the backrest. The leg swing motor 24 drives the second swing shaft 10 to rotate so that the angle of inclination of the second swing frame is the same as the angle of inclination of the legs. The backrest swing claws 17 are used to catch the bottom of the measured seat backrest. The headrest of the seat to be measured is caught by the headrest swing claws 23. The middle of the backrest of the seat under test is clamped using the backrest loading fixture 20. The swing claw 9 of the chair leg is used for clamping the top of the front chair leg of the tested seat. The front chair leg of the tested chair is clamped by a chair leg loading clamp 6.
And step three, ventilating the backrest loading cylinder 21, so that the backrest loading clamp 20 exerts a lifting force on the tested seat backrest. The chair leg loading cylinder 5 is ventilated, so that the chair leg swinging claw 9 exerts an upward force on the front chair leg of the tested chair
And step four, the backrest swinging motor 25, the headrest swinging motor 26 and the chair leg swinging motor 24 respectively carry out forward and reverse reciprocating rotation according to respective preset amplitudes, so that the backrest swinging claw 17, the headrest swinging claw 23 and the chair leg swinging claw 9 carry out forward and reverse reciprocating swinging, and the backrest, the headrest and the front chair leg of the tested seat are respectively subjected to swinging tests.
And step five, after the shaking test reaches the preset shaking times or duration, separating the tested seat from the two backrest headrest combined testing mechanisms I and the two chair leg testing mechanisms II, and detaching the base 1. And checking whether the tested seat has damage including looseness of the joint. Thereby realizing the fatigue accelerated test to the seat.
Claims (10)
1. A fatigue test system for a seat multi-linkage mechanism comprises a base (1), two backrest and headrest combined test mechanisms and two chair leg test mechanisms, wherein the two backrest and headrest combined test mechanisms and the two chair leg test mechanisms are installed on the base (1); the method is characterized in that: the backrest headrest joint test mechanism comprises a first mounting seat and a joint swinging assembly; the joint swinging assembly is arranged on one side of the top of the first mounting seat; the joint swinging assemblies in the two chair leg testing mechanisms are oppositely arranged; the combined swinging assembly comprises a first swinging frame, a backrest swinging claw (17) and a headrest swinging claw (23); the first swing frame is rotationally connected to the first mounting seat and is driven to rotate by the power element; the backrest swinging claw (17) is arranged on the outer side surface of the backrest swinging block (15) and deviates from the rotating axis of the first swinging frame and the first mounting seat; the backrest swinging claw (17) is arranged on the outer side surface of the backrest swinging block (15) and deviates from the rotating axis of the first swinging frame and the first mounting seat; the headrest swinging claw (23) is arranged on the outer side surface of the backrest swinging block (15) and is arranged at an interval with the backrest swinging claw (17); the headrest swinging claw (23) is driven by a power element to swing;
the chair leg testing mechanism comprises a second mounting seat and a chair leg swinging assembly; the chair leg swinging assembly is arranged on one side of the top of the second mounting seat; the chair leg swinging components in the two backrest headrest combined testing mechanisms are arranged oppositely; the chair leg swinging component comprises a second swinging frame and a chair leg swinging claw (9); the second swinging frame is rotatably connected to the second mounting seat and is driven to rotate by the power element; the chair leg swing clamping jaws (9) are arranged on the outer side surface of the chair leg swing block (8) and deviate from the rotation axis of the second swing frame and the second mounting seat.
2. The fatigue testing system for the multi-linkage mechanism of the seat as claimed in claim 1, wherein: the base (1) is provided with a clamp for fixing the tested seat; the positions of the backrest headrest combined testing mechanism and the chair leg testing mechanism on the base (1) can be adjusted.
3. The fatigue testing system for the multi-linkage mechanism of the seat as claimed in claim 1, wherein: the first swing frame is arranged on the first mounting seat through a first mounting driving assembly; the first installation driving assembly comprises a first swinging shaft (16), a first bearing (31), a first flat key (32) and a backrest swinging motor (25); the first swinging shaft (16) is supported on the top of the first mounting seat through a first bearing (31); the first swinging shaft (16) is driven to rotate by a backrest swinging motor (25); the bottom of the backrest swing block (15) is connected with a first swing shaft (16) through a first flat key (32); the backrest swinging claw (17) comprises two backrest clamping arms which are arranged at intervals; the symmetry planes of the two backrest clamping arms pass through the rotation axes of the swing frame and the first mounting seat; the distance between the two backrest clamping arms is adjusted by installing cushion blocks with different thicknesses on the inner sides of the backrest clamping arms or sleeving outer sleeves with different sizes on the backrest clamping arms.
4. The fatigue testing system for the multi-linkage mechanism of the seat as claimed in claim 1, wherein: the headrest swinging claw (23) is arranged on the first swinging frame through a first mounting driving component; the second mounting driving assembly comprises a headrest swinging motor (26), a second bearing (33) and a second swinging shaft (22); the second swing shaft (22) is supported on the first swing frame through a second bearing (33); the second swinging shaft (22) is driven to rotate by a headrest swinging motor (26); a headrest swing claw (23) is eccentrically fixed at the outer end of the second swing shaft (22); the headrest swing claw (23) comprises a connecting part and two headrest clamping arms which are fixed on the connecting part and are arranged at intervals; the symmetry planes of the two headrest clamping arms pass through the axis of the second swinging shaft (22); the distance between the two headrest clamping arms is adjusted by installing cushion blocks with different thicknesses on the inner sides of the headrest clamping arms or sleeving jackets with different sizes on the headrest clamping arms.
5. The fatigue testing system for the multi-linkage mechanism of the seat as claimed in claim 1, wherein: the joint swinging assembly also comprises a backrest loading assembly; the backrest loading assembly is arranged on the outer side of the first swing frame and is positioned between the backrest swing claw (17) and the headrest swing claw (23); the backrest loading assembly comprises a backrest loading cylinder (21) and a backrest loading clamp (20); a cylinder body of a backrest loading cylinder (21) which is vertically arranged is fixed with the outer side surface of the first swing frame; a backrest loading clamp (20) is arranged at the outer end of a piston rod of the backrest loading cylinder (21); a backrest-loading clamp (20) capable of clamping the backrest of the seat; the chair leg swinging assembly also comprises a chair leg loading assembly; the chair leg loading assembly is arranged on the outer side of the second swinging frame; the chair leg loading assembly comprises a chair leg loading cylinder (5) and a chair leg loading clamp (6); the cylinder body of the vertically arranged chair leg loading cylinder (5) is fixed with the outer side surface of the second swing frame; a chair leg loading clamp (6) is arranged at the outer end of a piston rod of the chair leg loading cylinder (5); the chair leg loading clamp (6) can clamp the chair leg.
6. The fatigue testing system for the multi-linkage mechanism of the seat as claimed in claim 1 or 5, wherein: the first swinging frame comprises a backrest swinging block (15), a first position adjusting frame (18) and a second fixing screw rod (19); the first position adjusting frame (18) is arranged at the top of the backrest swinging block (15) through a second fixing screw rod (19) and is adjustable in position; the backrest swing claw (17) is arranged on the backrest swing block (15); a headrest swing claw (23) is mounted on the first position adjustment frame (18).
7. The fatigue testing system for the multi-linkage mechanism of the seat as claimed in claim 1, wherein: the second swing frame is arranged on the second mounting seat through a third mounting driving assembly; the third installation driving component comprises a second swinging shaft (10), a third bearing (30), a second flat key (29) and a chair leg swinging motor (24); the second swinging shaft (10) is supported on the second mounting seat through a third bearing (30); the second swinging shaft (10) is driven to rotate by a chair leg swinging motor (24); the top of the chair leg swinging block (8) is connected with a second swinging shaft (10) through a second flat key (29); the chair leg swing claw (9) comprises two chair leg clamping arms which are arranged at intervals; the symmetrical surfaces of the two chair leg clamping arms pass through the axis of the second swinging shaft (10); the distance between the two chair leg clamping arms is adjusted by installing cushion blocks with different thicknesses on the inner sides of the chair leg clamping arms or sleeving outer sleeves with different sizes on the chair leg clamping arms.
8. The fatigue testing system for the seat multi-linkage mechanism as recited in claim 5, wherein: the second swinging frame comprises a chair leg swinging block (8), a second position adjusting frame (3) and a fourth fixing screw rod (7); the second position adjusting frame (3) is arranged at the top of the chair leg swinging block (8) through a fourth fixing screw rod (7); a plurality of fourth mounting holes are formed in the top of the chair leg swinging block (8) and are sequentially arranged from top to bottom, and the position of the second position adjusting frame (3) is adjusted by penetrating a fourth fixing screw (7) through different fourth mounting holes; the chair leg swing claw (9) is arranged on the chair leg swing block (8); the chair leg loading component is arranged on the second position adjusting frame (3).
9. The fatigue testing system for the multi-linkage mechanism of the seat as claimed in claim 1, wherein: the first mounting seat comprises a first supporting seat (12), a first fixing screw (13), a first bracket (14) and a first connecting plate (27); two first supporting seats (12) which are arranged side by side and at intervals are fixed on the base (1); the two first supporting seats (12) are respectively provided with a first bracket (14) through a first fixing screw rod (13); a plurality of first mounting holes are formed in the first supporting seat (12) and are sequentially arranged from top to bottom; the height of the first bracket (14) is adjusted by passing a first fixing screw (13) through different first mounting holes; the second mounting seat comprises a second supporting seat (2), a third fixing screw (4), a second bracket (28) and a second connecting plate (11); two second supporting seats (2) which are arranged side by side and at intervals are fixed on the base (1); a second support (28) is arranged on each of the two second supporting seats (2) through a third fixing screw rod (4); a plurality of third mounting holes are formed in the second supporting seat (2) and are sequentially arranged from top to bottom, and the position of the second support (28) is adjusted in a mode that the third fixing screw (4) penetrates through different third mounting holes.
10. The test method of the fatigue test system for the seat multi-linkage mechanism as claimed in claim 5, wherein:
fixing a tested seat on a base (1), aligning the rotation axis of a first swing frame with the joint of the backrest and the seat surface of the tested seat, and aligning the joint of a second swing frame with the joint of the front legs and the seat surface of the tested seat;
the first swing frame rotates to be aligned with the backrest of the tested seat; the second swing frame rotates to be aligned with the front chair leg; a backrest swinging claw (17) is used for clamping the bottom of the tested seat backrest; a headrest swing claw (23) is used for clamping the headrest of the seat to be detected; clamping the middle part of the backrest of the seat to be tested by using a backrest loading clamp (20); the top of the front chair leg of the tested seat is clamped by a chair leg swinging claw (9); clamping the front chair leg of the tested seat by using a chair leg loading clamp (6);
ventilating a backrest loading cylinder (21) to enable a backrest loading clamp (20) to apply lifting force to the tested seat backrest; the chair leg loading cylinder (5) is ventilated, so that the chair leg swinging claw (9) applies lifting force to the front chair leg of the tested chair
The backrest swinging claw (17), the headrest swinging claw (23) and the chair leg swinging claw (9) perform forward and reverse reciprocating swinging, and the backrest, the headrest and the front chair leg of the tested seat are respectively tested;
after the preset swinging times or duration is reached, separating the tested seat from the two backrest headrest combined testing mechanisms and the two chair leg testing mechanisms, and detaching the base (1); and checking whether the tested seat is damaged or not.
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| CN202110523584.0A CN113358385B (en) | 2021-05-13 | 2021-05-13 | Fatigue test system and method for seat multi-linkage mechanism |
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|---|---|
| CN113358385B (en) | 2022-09-02 |
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