A bus seat durability testing device

Abstract

The present invention discloses a durability testing device for bus seats, comprising a control device, a test bench and an impact component arranged on the test bench, wherein the test bench is also used to carry the bus seat to be tested, and is characterized in that the impact component comprises a vertical impact component and a horizontal impact component, the control device is used to control the start and stop actions of the vertical impact component and the horizontal impact component, the vertical impact component is used to apply an alternating load in a vertical direction to a seat plate to perform a durability test on the seat plate, the horizontal impact component is used to apply an alternating load in a horizontal direction to a seat back plate to perform a durability test on the seat back plate, and the testing device can be used for alternating load durability tests of the seat plate and the back plate.

Description

Technical Field

[0001] The invention belongs to the field of automobile seat production, and in particular relates to a bus seat durability testing device. Background Art

[0002] Buses are the main means of transportation between cities, between urban and rural areas, and within the city. There is a large flow of people on buses. As people get up and sit down, and as the car brakes and accelerates, bus seats will age faster, so fatigue durability testing is one of the important test indicators for bus seats. The structural shapes of bus seats vary. A bus seat manufacturer generally has several or even more than a dozen different seat products. Because there are many types of seats, it is difficult to completely unify the test standards and test methods of seats. For the seat product market, if the seat comfort is not considered, the longer the durability of the seat, the better its quality.

[0003] Existing bus seats or similar products generally use heavy objects to repeatedly hit them to test fatigue durability strength. The number of repeated impacts can reach tens of thousands or even hundreds of thousands of times. However, the test equipment used to test seat fatigue durability is mostly dedicated test equipment. If different seat products are equipped with a separate test equipment, the production cost will be greatly increased. Furthermore, the safety of the test process must also be considered during the long-term durability test.

[0004] The invention patent with application number 201110460510.3 discloses "Seat Vertical Impact Test Device and Test Method". The test device includes a test bench, a mounting bracket, an impact component and a lifting mechanism. It can be seen from its specification that the test device is an open test device, and the impact force of its impact component is provided by weights. The structure is complex. Combined with its drawings, it can be seen that the test device cannot be used for fatigue durability testing of seat back panels.

[0005] The invention patent with application number 201510157613.0 discloses a method for testing the vertical impact durability of a seat. The method is to first fix the seat to the base of the test machine and hang a heavy object on the crossbeam, use the coarse adjustment device and fine adjustment device of the test machine to adjust the initial drop height of the heavy object, and use the upper and lower suction cups and telescopic gas rod of the test machine to move up and down to achieve the free fall of the heavy object to hit the seat. Combined with the content of its specification, it can be seen that the test process of the test device is complicated and is only suitable for fatigue testing of seat panels in the vertical direction. Summary of the invention

[0006] In view of the above technical problems, the present invention provides a bus seat durability testing device, which is suitable for durability testing of different types of bus seats. One device can be used for both vertical impact testing and horizontal impact testing.

[0007] The technical solution of the present invention is:

[0008] A bus seat durability test device comprises a control device, a test bench and an impact component arranged on the test bench, the test bench is also used to carry the bus seat to be tested, characterized in that the impact component comprises a vertical impact component and a horizontal impact component, the control device is used to control the start and stop of the vertical impact component and the horizontal impact component, the vertical impact component is used to apply an alternating load in a vertical direction to a seat plate to perform a durability test on the seat plate, the horizontal impact component is used to apply an alternating load in a horizontal direction to a seat back plate to perform a durability test on the seat back plate, and the test device can be used for alternating load durability test of the seat plate and the back plate.

[0009] The test bench of the present invention comprises a base for carrying a seat and a bracket formed by connecting a column, a first cross column and a second cross column, each of which has a guide rail, wherein the lower end of the column is fixedly connected to the base, and the upper end of the column is connected via the first cross column or the second cross column;

[0010] The vertical impact component includes a vertical cylinder and a vertical impact block, the vertical impact block is fixedly connected to the push rod of the vertical cylinder, the vertical cylinder is fixedly installed on a first liftable crossbeam, both ends of the first liftable crossbeam are connected with a lifting mechanism, the lifting mechanism is arranged between the first cross column and the base of the test bench, the upper end of the lifting mechanism is connected to the first cross column, so that the lifting mechanism can drive the first liftable crossbeam to move up and down;

[0011] The horizontal impact component includes a horizontal cylinder and a horizontal impact block, the horizontal impact block is fixedly connected to the push rod of the horizontal cylinder, the horizontal cylinder is fixedly installed on a second liftable beam, and the two ends of the second liftable beam are respectively connected to two different columns, so that the second liftable beam can move up and down relative to the column.

[0012] The base of the test bench of the present invention is provided with a plurality of "T"-shaped slots which are parallel to each other and distributed at equal distances. The "T"-shaped slots are used to fix and install a support for supporting a seat, and the support is fixedly connected to the seat body.

[0013] The chair body of the present invention comprises a seat plate and a back plate connected to each other.

[0014] As a feasible implementation mode of the present invention, preferably, the bracket of the present invention is a rectangular frame including four vertical columns, two first horizontal columns, and two second horizontal columns, wherein the lower ends of the two vertical columns are connected to the base of the test bench, and the upper ends are connected through the first horizontal column to form a side support, and the upper ends of the two parallel side supports are connected through two second horizontal columns.

[0015] The side supports of the bracket of the present invention further include a first middle cross column connecting two upright columns in the middle, and the first middle cross columns of the two side supports on the bracket are arranged at the same height.

[0016] The first middle horizontal column of the present invention is provided with a guide rail, and the lifting mechanism is a screw lifting mechanism, each lifting mechanism includes a screw, an upper horizontal guide plate, and a lower horizontal guide plate, the upper and lower ends of the screw are respectively connected to the upper horizontal guide plate and the lower horizontal guide plate, the upper horizontal guide plate is connected to the first horizontal column so that the upper horizontal guide plate can move in the horizontal direction, and the lower horizontal guide plate is connected to the first middle horizontal column so that the lower horizontal guide plate can move in the horizontal direction, each lifting mechanism also includes an intermediate plate threadedly connected to the screw, the intermediate plate is fixedly connected to the first liftable beam, the screw passes through the intermediate plate and the intermediate plate is arranged between the upper horizontal guide plate and the lower horizontal guide plate connected to the screw.

[0017] Each lifting mechanism of the present invention also includes two guide rods arranged on both sides of the screw rod, the two ends of the guide rods are respectively connected to the upper horizontal guide plate and the lower horizontal guide plate, the guide rods pass through the middle plate and there is a gap between the guide rods and the middle plate, so that the middle plate can move up and down between the upper horizontal guide plate and the lower horizontal guide plate.

[0018] One end of the lead screw of each lifting mechanism of the present invention is connected with a transmission wheel, and the transmission wheels of the lifting mechanisms are connected and rotated synchronously through belts or transmission chains so that the lifting mechanisms can be lifted and lowered synchronously.

[0019] The connecting surfaces of the upright column, the first horizontal column, the second horizontal column and the first intermediate horizontal column of the bracket of the present invention are each provided with two parallel "T"-shaped grooves to form respective guide rail grooves. The first horizontal column or the first intermediate horizontal column or the upright column of the bracket is fixedly connected to the lifting mechanism or the second liftable beam through bolts and the guide rail grooves.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1. The present invention is used for durability testing of the seat plate and the back plate of a bus seat. The cylinder provides an alternating load to increase the stability of the test process. The bracket is composed of a vertical column, a first horizontal column, and a second horizontal column to form a frame structure with certain safety protection, which further ensures the safety during the test.

[0022] 2. The bracket arranged on the test bench of the present invention is composed of a column with a guide rail and a horizontal column. The impact component is installed on the column or the horizontal column through its connecting component. The height and horizontal position of the impact component are easy to adjust, which improves the applicability of the test device and can be used for fatigue durability tests of seat panels and back panels of seats with different technical requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Figure 1 It is a three-dimensional structural schematic diagram of a bus seat durability testing device of the present invention;

[0025] Figure 2 It is a front view of a seat plate test condition of a bus seat durability test device of the present invention;

[0026] Figure 3 A side view of a bus seat durability testing device of the present invention in a seat plate testing condition;

[0027] Figure 4 The present invention is a side view of a back panel test condition of a bus seat durability test device.

[0028] Description of Reference Numerals

[0029] 1-base; 2-column; 3-first horizontal column; 4-second horizontal column; 5-middle column; 6a-first middle horizontal column; 6b-second middle horizontal column; 7-vertical impact block; 8-vertical cylinder; 9-first liftable beam; 10-middle plate; 11-lower horizontal guide plate; 12-upper horizontal guide plate; 13-screw; 14-guide rod; 15-transmission wheel; 16-horizontal impact block; 17-horizontal cylinder; 18-second liftable beam; 19-seat; 20-support; 21-support bottom plate; 22-"T" slot, 23-control device. DETAILED DESCRIPTION

[0030] A bus seat durability test device includes a control device, a test bench and an impact component arranged on the test bench. The test bench is also used to carry the bus seat to be tested. The impact component includes a vertical impact component and a horizontal impact component. The control device is used to control the start and stop of the vertical impact component and the horizontal impact component. The vertical impact component is used to apply an alternating load in the vertical direction to the seat plate to perform a durability test on the seat plate. The horizontal impact component is used to apply an alternating load in the horizontal direction to the seat back plate to perform a durability test on the seat back plate. The test device can also be used for alternating load durability tests on the seat plate and the back plate. Figure 1As shown in Figure 4, the test bench includes a base 1 for carrying a seat and a bracket composed of a column 2, a first cross column 3, and a second cross column 4, each of which has a guide rail. The base 1 is a large-mass metal plate that can ensure stability during the test. The lower end of the column 2 is fixedly connected to the base 1, and the upper end of the column 2 is connected through the first cross column 3 or the second cross column 4. Specifically, the bracket is a rectangular frame including four columns 2, two first cross columns 3, and two second cross columns 4, wherein the lower ends of the two columns 2 are connected to the base 1 of the test bench, and the upper ends are connected through the first cross column 3 or the second cross column 4. A side support is formed by connecting through the first cross column 3, and the upper ends of the two parallel side supports are connected by two second cross columns 4 to form the frame of the bracket. The side support of the bracket also includes a first intermediate cross column 6a connecting the two columns 2 in the middle, and the first intermediate cross column 6a is provided with a guide rail. The first intermediate cross columns 6a of the two side supports on the bracket are arranged at the same height, and a side surface of the bracket adjacent to the side support is used to place or remove seats, and the other side surface does not need to place or remove seats, so a second intermediate cross column 6b connecting the two side supports is provided on the side surface to stabilize the device.

[0031] Two parallel "T"-shaped grooves are provided on the connecting surfaces of the bracket's column 2, first cross column 3, second cross column 4 and first intermediate cross column 6a to form respective guide grooves, and the guide grooves can be connected and fixed to the impact component by bolts to facilitate height adjustment or horizontal adjustment of the impact component.

[0032] The impact component includes a vertical impact component and a horizontal impact component. The vertical impact component includes a vertical cylinder 8 and a vertical impact block 7. The vertical impact block 7 is fixedly connected to the push rod of the vertical cylinder 8. The vertical cylinder 8 is fixedly installed on a first liftable crossbeam 9. Both ends of the first liftable crossbeam 9 are connected with a lifting mechanism. The lifting mechanism is arranged between the first cross column 3 and the base 1 of the test bench. The upper end of the lifting mechanism is connected to the first cross column 3.

[0033] The lifting mechanism is a screw lifting mechanism, and the vertical impact component adopts two lifting mechanisms, each lifting mechanism includes a screw 13, an upper horizontal guide plate 12, and a lower horizontal guide plate 11. The upper and lower ends of the screw 13 are respectively connected to the upper horizontal guide plate 12 and the lower horizontal guide plate 11. The upper horizontal guide plate 12 is connected to the guide groove of the first horizontal column 3, so that the upper horizontal guide plate 12 can be moved and adjusted in the horizontal direction. The lower horizontal guide plate 11 is connected to the guide groove of the first intermediate horizontal column 6a so that the lower horizontal guide plate 11 can be moved and adjusted in the horizontal direction. In this way, the position of the vertical impact component in the horizontal direction can be adjusted to adapt to the seat impact position. Each lifting mechanism also includes an intermediate plate 10 threadedly connected to the screw 13, the intermediate plate 10 is fixedly connected to the first liftable crossbeam 9, the screw 13 passes through the intermediate plate 10, and the intermediate plate 10 is arranged between the upper horizontal guide plate 12 and the lower horizontal guide plate 11 connected to the screw. Each lifting mechanism also includes two guide rods 14 arranged on both sides of the screw rod 13, and the two ends of the guide rod 14 are respectively connected to the upper horizontal guide plate 12 and the lower horizontal guide plate 11. The guide rod 14 passes through the middle plate 10 and there is a gap between the guide rod 14 and the middle plate 10, so that the middle plate 10 plays a guiding role when moving up and down between the upper horizontal guide plate 12 and the lower horizontal guide plate 11.

[0034] One end of the screw rod 13 of each lifting mechanism is connected to a transmission wheel 15, and the transmission wheels 15 of each lifting mechanism are connected and rotated synchronously through a belt or a transmission chain so that each lifting mechanism can be lifted and lowered synchronously, and the lifting mechanism can drive the first liftable crossbeam 9 to lift and lower;

[0035] The horizontal impact component includes a horizontal cylinder 17 and a horizontal impact block 16. The horizontal impact block 16 is fixedly connected to the push rod of the horizontal cylinder 17. The horizontal cylinder 17 is fixedly installed on a second liftable beam 18. The two ends of the second liftable beam 18 are respectively connected to the guide grooves on two different columns, so that the second liftable beam 18 can move up and down relative to the column 2, so as to facilitate the vertical height adjustment of the horizontal impact component to suit the testing of seat panels of different heights.

[0036] As a preferred embodiment, a plurality of "T"-shaped slots 22 which are parallel to each other and equidistantly distributed are provided on the base 1 of the test bench. The "T"-shaped slots 22 are used to fix a support 20 for supporting a seat. The support 20 is fixedly connected to the seat body to fix the seat position. The lower end of the support 20 has a support base plate 21, and the support base plate 21 can be fixedly installed at the "T"-shaped slot 22 by bolts. A plurality of "T"-shaped slots 22 can be used to connect different support base plates.

[0037] As a preferred embodiment, the vertical cylinder and the horizontal cylinder drive the vertical impact block or the horizontal impact block to provide a load of 0 to 300N, with a loading frequency of 30 times / min. 150,000 impacts are performed at the center of the seat plate or the center of the back plate. If the seat has no abnormal phenomena such as damage, cracks, or significant deformation, it means that the seat has passed the durability test.

[0038] A control device 23 is installed on the bracket. The loading action of the vertical cylinder and the horizontal cylinder can be achieved by a microcontroller such as a PLC controller of the control device 23 combined with an electromagnetic valve to control the inflation and deflation of the cylinder. This is the content of the prior art and will not be elaborated here.

[0039] The above embodiments of the present invention are not intended to limit the protection scope of the present invention, and the implementation modes of the present invention are not limited thereto. All other modifications, replacements or changes made to the above structures of the present invention based on the above contents of the present invention, in accordance with common technical knowledge and customary means in the art, without departing from the above basic technical ideas of the present invention, should fall within the protection scope of the present invention.

Claims

1. A bus seat durability test device, comprising a control device, a test bench and an impact component arranged on the test bench, wherein the test bench is also used to carry a bus seat to be tested, characterized in that: The impact component includes a vertical impact component and a horizontal impact component. The control device is used to control the start and stop of the vertical impact component and the horizontal impact component. The vertical impact component is used to apply an alternating load in the vertical direction to the seat plate to perform a durability test on the seat plate. The horizontal impact component is used to apply an alternating load in the horizontal direction to the seat back plate to perform a durability test on the seat back plate. The test device can also be used for alternating load durability tests on the seat plate and the back plate. The base of the test bench is provided with a plurality of "T"-shaped grooves which are parallel to each other and are distributed at equal distances. The "T"-shaped grooves are used to fix and install a support for carrying a seat, and the support is fixedly connected to the seat body; The test bench includes a base for carrying a seat and a bracket formed by connecting a column, a first cross column, and a second cross column, each of which has a guide rail. The lower end of the column is fixedly connected to the base, and the upper end of the column is connected through the first cross column or the second cross column. The vertical impact component includes a vertical cylinder and a vertical impact block, the vertical impact block is fixedly connected to the push rod of the vertical cylinder, the vertical cylinder is fixedly installed on a first liftable crossbeam, both ends of the first liftable crossbeam are connected with a lifting mechanism, the lifting mechanism is arranged between the first cross column and the base of the test bench, the upper end of the lifting mechanism is connected to the first cross column, so that the lifting mechanism can drive the first liftable crossbeam to move up and down; The horizontal impact component includes a horizontal cylinder and a horizontal impact block, the horizontal impact block is fixedly connected to the push rod of the horizontal cylinder, the horizontal cylinder is fixedly installed on a second liftable beam, and the two ends of the second liftable beam are respectively connected to two different columns, so that the second liftable beam can move up and down relative to the column; The bracket is a rectangular frame including four upright posts, two first horizontal posts, and two second horizontal posts, wherein the lower ends of the two upright posts are connected to the base of the test bench, and the upper ends are connected to form a side support through the first horizontal posts, and the upper ends of the two parallel side supports are connected through the two second horizontal posts; The side support of the bracket also includes a first middle cross column connecting two upright columns in the middle, and the first middle cross columns of the two side supports on the bracket are arranged at the same height; The first intermediate horizontal column is provided with a guide rail, and the lifting mechanism is a screw lifting mechanism, each lifting mechanism includes a screw, an upper horizontal guide plate, and a lower horizontal guide plate, the upper and lower ends of the screw are respectively connected to the upper horizontal guide plate and the lower horizontal guide plate, the upper horizontal guide plate is connected to the first horizontal column so that the upper horizontal guide plate can move in the horizontal direction, and the lower horizontal guide plate is connected to the first intermediate horizontal column so that the lower horizontal guide plate can move in the horizontal direction, each lifting mechanism also includes an intermediate plate threadedly connected to the screw, the intermediate plate is fixedly connected to the first liftable cross beam, the screw passes through the intermediate plate and the intermediate plate is arranged between the upper horizontal guide plate and the lower horizontal guide plate connected to the screw.

2. The bus seat durability testing device according to claim 1, characterized in that: Each lifting mechanism also includes two guide rods arranged on both sides of the screw rod, the two ends of the guide rods are respectively connected to the upper horizontal guide plate and the lower horizontal guide plate, the guide rods pass through the middle plate and there is a gap between the guide rods and the middle plate, so that the middle plate can move up and down between the upper horizontal guide plate and the lower horizontal guide plate.

3. The bus seat durability testing device according to claim 2, characterized in that: One end of the lead screw of each lifting mechanism is connected with a transmission wheel, and the transmission wheels of the lifting mechanisms are connected by belts or transmission chains and rotate synchronously so that the lifting mechanisms can be lifted and lowered synchronously.

4. The bus seat durability testing device according to claim 3, characterized in that: Two parallel "T"-shaped grooves are provided on the connecting surfaces of the upright column, the first horizontal column, the second horizontal column and the first intermediate horizontal column of the bracket to form respective guide rail grooves. The first horizontal column or the first intermediate horizontal column or the upright column of the bracket is fixedly connected to the lifting mechanism or the second liftable crossbeam through bolts and the guide rail grooves.

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