A multifunctional test device for bus seat strength testing

Abstract

The present invention discloses a multifunctional testing device for bus seat strength test, comprising a control device, a test bench and a force-applying component arranged on the test bench, the test bench is also used to carry the bus seat to be tested, characterized in that the force-applying component comprises a vertical force-applying component and a horizontal force-applying component, the vertical force-applying component is used to apply a constant load in a vertical direction to the seat plate of the seat to test the strength of the seat plate of the seat, the horizontal force-applying component is used to apply a constant load in a horizontal direction to the back plate of the seat to test the strength of the back plate of the seat, and the control device is used to control the start and stop action of the force-applying component. The present invention can be used for strength tests of multiple positions such as the seat plate and back plate of a bus seat at the same time.

Description

Technical Field

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

[0002] Buses are the main means of transportation between cities, between urban and rural areas, and within cities in China. According to incomplete statistics, there are currently about 800,000 buses in China. A major feature of buses is that the distance between two stops is short and the road conditions are complex. In some first-tier cities in China, passenger congestion is a common phenomenon. To ensure the safety of passengers, bus seats are generally equipped with handrails for standing passengers. In order to cope with the complex road conditions and passenger conditions of buses, such as frequent braking and acceleration of buses, and high mobility of personnel, car seats are key facilities to ensure passenger safety. Therefore, bus seats must not only meet the riding comfort, but also strictly guarantee their strength and other mechanical properties.

[0003] Every year, a large number of new buses are put into use, and a large number of bus seats need to be repaired and replaced. New bus seats need to undergo rigorous testing after production to ensure product quality. The main components of bus seats are the seat plate, back plate, seat armrests and vehicle fixings of the seat, and the strength of these components must meet the strength requirements. These technical indicators need to be tested, and the existing test equipment needs to be equipped with multiple test devices to complete a series of seat tests. The test device occupies a large area, which greatly affects the production cost.

[0004] With this in mind, a new seat testing facility had to be developed. Summary of the invention

[0005] In view of the above technical problems, the present invention provides a multifunctional testing device for bus seat strength testing, which is suitable for strength testing of different components on various types of bus seats.

[0006] The technical solution of the present invention is:

[0007] The present invention provides a multifunctional testing device for testing the strength of bus seats, comprising a control device, a test bench and a force-applying 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 force-applying component comprises a vertical force-applying component and a horizontal force-applying component, wherein the vertical force-applying component is used to apply a constant load in a vertical direction to the seat plate of the seat to test the strength of the seat plate of the seat, and the horizontal force-applying component is used to apply a constant load in a horizontal direction to the back plate of the seat to test the strength of the back plate of the seat, and the control device is used to control the start and stop actions of the force-applying component.

[0008] The test bench of the present invention comprises a base and a bracket for carrying a seat, wherein the bracket comprises a plurality of upright posts with guide rails, and a plurality of upright posts are connected by a cross post to form the bracket;

[0009] The vertical force-applying component includes a vertical cylinder and a vertical force-applying template connected to a push rod of the vertical cylinder, and the cylinder body of the vertical cylinder is connected to the guide rail of the column through a first liftable crossbeam, so that the vertical cylinder can move up and down relative to the column;

[0010] At least one group of horizontal force-applying components is provided, and each group of horizontal force-applying components includes a horizontal cylinder and a horizontal force-applying template connected to the push rod of the horizontal cylinder. The horizontal cylinder is connected to the guide rail of the column through a second liftable crossbeam, so that the horizontal cylinder can move up and down relative to the column.

[0011] The front ends of the push rods of the vertical cylinder and the horizontal cylinder of the present invention are connected to respective push plates, and the push plates are fixedly connected to the vertical force-applying template or the horizontal force-applying template;

[0012] The push plate is also fixedly connected with a guide rod, which passes through the first liftable crossbeam to guide when the push rod of the vertical cylinder performs telescopic movement, and the guide rod passes through the second liftable crossbeam to guide when the horizontal cylinder performs telescopic movement.

[0013] The present invention provides two groups of horizontal force-applying components, and the two groups of horizontal force-applying components are arranged in parallel up and down, and simulated loads can be applied simultaneously at different heights of the back plate to test the strength of the back plate.

[0014] The base of the test bench of the present invention is also provided with a plurality of parallel "T"-shaped slots, and the support component of the seat or the vehicle fixing component of the seat is fixedly connected to the base of the test bench through bolts and the "T"-shaped slots. The "T"-shaped slot structure can be used for the installation and fixing of different structural parts, thereby improving the applicability of the base.

[0015] The present invention can also be used to test the strength of a seat armrest. The vertical force application template can be connected to the seat armrest via a force transmission component, and a vertical pulling force is applied to the armrest to test the strength of the armrest. The horizontal force application template can be connected to the seat armrest via a force transmission component, and a horizontal pulling force is applied to the armrest to test the strength of the armrest.

[0016] The present invention can also be used for strength testing of vehicle fixings of seats. The vehicle fixings of the seats are fixed to the base of the test bench. The vehicle fixings are fixedly connected to the indirect force-receiving components. A constant load in the horizontal direction is applied to the indirect force-receiving components through the horizontal force-applying template to test the strength of the vehicle fixings.

[0017] As a preferred implementable manner, the bracket of the present invention has four columns, the columns are arranged in the vertical direction and distributed in a rectangular shape, the lower ends of the columns are fixedly connected to the base, and the upper ends of the columns are connected through cross columns so that the bracket forms a stable frame, and the cross columns include a first cross column and a second cross column, two first cross columns are provided, each first cross column connects two columns, and the middle parts of the two first cross columns are connected through the second cross column.

[0018] Compared with the prior art, the present invention has the following significant effects:

[0019] The present invention can meet the strength test of the seat plate and the back plate of a bus seat by arranging the vertical force-applying component and the horizontal force-applying component on the same test bench. The present invention can also be used for the strength test of the seat back armrests and the vehicle fixings of the seat. It integrates multiple testing functions in one, replaces the original multiple testing devices, and reduces the equipment investment and land investment in seat testing.

[0020] The present invention uses a cylinder as a power source, and the force-applying component is fixed to the bracket of the test bench through a guide rail connection, which is convenient for adjusting the test position such as the height of the test device. It is suitable for testing various types of bus seats, has strong versatility, and is suitable for industry promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Figure 1 It is a three-dimensional structural schematic diagram of a multifunctional testing device for bus seat strength testing of the present invention;

[0023] Figure 2 It is a front view of a multifunctional testing device for testing the strength of bus seats according to the present invention;

[0024] Figure 3 It is a side view of a back plate strength test working condition of a multifunctional test device for bus seat strength test of the present invention;

[0025] Figure 4 It is a side view of a backrest armrest strength test working condition of a multifunctional test device for bus seat strength test of the present invention;

[0026] Figure 5 The present invention is a side view of a working condition of a vehicle fixing strength test part of a bus seat of a multifunctional testing device for testing the strength of a bus seat.

[0027] Description of Reference Numerals

[0028] 1-base; 2-column; 3-first horizontal column; 4-second horizontal column; 5-first liftable crossbeam; 6-vertical force template; 7-vertical cylinder; 8-high-position second liftable crossbeam; 9-high-position horizontal force template; 10-high-position horizontal cylinder; 11-low-position second liftable crossbeam; 12-low-position horizontal force template; 13-low-position horizontal cylinder; 14-support base plate; 15-seat; 16-"T" slot; 17-backrest armrest; 18-support component or vehicle fixing; 19-indirect force-receiving component; 20-control device. DETAILED DESCRIPTION

[0029] like Figure 1 -3 is a multifunctional testing device for bus seat strength testing, comprising a control device 20, a test bench and a force-applying component arranged on the test bench, the test bench comprising a base 1 and a bracket for carrying a seat 15, the bracket comprising four columns 2 with guide rails, the columns 2 are arranged in the vertical direction and distributed in a rectangular shape, the lower ends of the columns 2 are fixedly connected to the base 1, and the upper ends of the columns 2 are connected through cross columns so that the bracket forms a stable frame, the cross columns comprise a first cross column 3 and a second cross column 4, two first cross columns 3 are arranged, each first cross column connects two columns, and the middle parts of the two first cross columns are connected through a second cross column 4.

[0030] The force-applying component includes a vertical force-applying component and a horizontal force-applying component. The vertical force-applying component includes a vertical cylinder 7 and a vertical force-applying template 6 connected to the push rod of the vertical cylinder 7. The cylinder body of the vertical cylinder 7 is connected to the guide rail of the column 2 through the first liftable crossbeam 5, so that the vertical cylinder 7 can move up and down relative to the column 2; the vertical force-applying component is used to apply a constant load in the vertical direction to the seat plate of the seat to test the strength of the seat plate of the seat. Among them, the column can be a column with a guide rail groove, so that the liftable crossbeam can be connected to the guide rail groove and locked on the column by bolts. Other similar columns with locking and adjustment function rails can also be used.

[0031] There are two groups of horizontal force-applying components, which are arranged in parallel up and down, including a high-level horizontal force-applying component consisting of a high-level horizontal cylinder 10 and a high-level horizontal force template 9, and a low-level horizontal force-applying component consisting of a low-level horizontal cylinder 13 and a low-level horizontal force-applying component 12. The high-level horizontal cylinder 10 is connected to the guide rail of the column 2 through a high-level second liftable crossbeam 8, and the low-level horizontal cylinder 13 is connected to the guide rail of the column 2 through a low-level second liftable crossbeam 11, so that both the high and low-level horizontal cylinders can move up and down relative to the column 2, so that the horizontal force-applying component applies a constant horizontal load to two different heights of the back panel of the seat 15 to test the strength of the back panel of the seat. The control device 20 is installed on a column, which controls the inflation and deflation of the cylinder through a microcontroller such as a PLC combined with an electromagnetic valve, and then controls the start and stop action of the force-applying component. This scheme is a prior art and will not be repeated here.

[0032] The front ends of the push rods of the vertical cylinder 7, the high-position horizontal cylinder 10, and the low-position horizontal cylinder 13 are all connected with respective push plates. The push plate connected to the vertical cylinder is fixedly connected to the vertical force template 6; the push plate connected to the horizontal cylinder is fixedly connected to the horizontal force template.

[0033] A guide rod is also fixedly connected to the push plate. The push plate connected to the vertical cylinder passes through the first liftable crossbeam 5 and serves as a guide component when the push rod of the vertical cylinder 7 makes a telescopic movement. The push plate connected to the horizontal cylinder passes through the second liftable crossbeam in the high and low positions and serves as a guide component when the high and low horizontal cylinders make a telescopic movement.

[0034] The base 1 of the test bench is also provided with a plurality of parallel "T"-shaped slots 16, and the support member 18 of the seat 15 is fixedly connected to the base 1 of the test bench by bolts and the "T"-shaped slots 16. The "T"-shaped slot structure enables the base 1 to be used for the installation and fixation of different structural parts, thereby improving the applicability of the base.

[0035] In this embodiment, the strength test method of each component of the seat is carried out in accordance with the standard "Strength of Plastic Seats and Vehicle Fixings of Urban Buses" issued by the Ministry of Industry and Information Technology of the People's Republic of China on May 6, 2014. The standard number is QC / T 964-2014, and the structure of the force template is designed according to the requirements of the standard.

[0036] The test methods for the strength of each seat component are briefly described as follows:

[0037] Strength test of seat plate:

[0038] The seat 15 is fixedly installed at a suitable position of the base 1 of the test bench through a supporting component 18 with a supporting base plate 14, and the vertical cylinder 7 and the vertical force template 6 are adjusted to a suitable height through the first liftable crossbeam 5. Then the vertical cylinder 7 is started, and a vertical thrust is applied to the middle of the seat plate of the seat through the vertical force template 6 to determine whether the seat plate is damaged or has unacceptable deformation.

[0039] Strength test of seat back panel:

[0040] like Figure 3 As shown, adjust the high-position second liftable crossbeam 8 so that the high-position horizontal force-applying template 9 is located 0.70m to 0.80m above the seat installation plane, and apply a horizontal forward thrust of 1000±50N;

[0041] Adjust the low-position second liftable crossbeam 11 so that the low-position horizontal force-applying template 12 is located 0.45m to 0.55m above the seat installation plane, and apply a horizontal forward thrust of 200±50N;

[0042] Judgment method: The force should be applied simultaneously for at least 0.2s, 1) the maximum displacement of the center point of force application cannot be greater than 300mm.

[0043] 2) During the test, the seat parts, seat mounting parts and their accessories are not completely separated, and the structural parts of the seat or its accessories have no breaks or sharp corners or edges that may cause human injury.

[0044] Strength test of backrest and armrest:

[0045] like Figure 4 As shown, after rotating the seat 180°, adjust it to a suitable position and re-fix it on the base 1, adjust the vertical force template 6 to a suitable height, connect the vertical force template 6 to the seat backrest armrest 17 through a force transmission component such as a flat nylon rope of sufficient strength, apply a vertical tension of 1135±50N to the backrest armrest, and maintain this value for more than 0.2s. The starting position of the force is in the middle of the backrest armrest, and the force width is 50±10mm;

[0046] Adjust the high-position horizontal force template 9 to a suitable height, connect the seat backrest armrest through a flat nylon rope, apply a horizontal pulling force of 1135±50N to the backrest armrest, and maintain this value for more than 0.2s. The starting position of the force is in the middle of the backrest armrest, and the force width is 50±10mm. If the backrest armrest has no breakage, no separation, and no sharp corners or sharp edges that can cause injury to people, the strength measurement is qualified.

[0047] Strength test of vehicle fixings:

[0048] like Figure 5 As shown, the vehicle fixing part 18 of the seat is fixed on the base 1 of the test bench. The vehicle fixing part 18 is fixedly connected with the indirect force-receiving component 19. The indirect force-receiving component 19 is a rigid tripod connected by square tubes. A constant load of 5000±50N in the horizontal direction is applied to the indirect force-receiving component 19 at 0.75m above the installation plane of the vehicle fixing part and the indirect force-receiving component through a high-position or low-position horizontal force-applying template, and maintained for at least 0.2s. If the vehicle fixing part can withstand the test force within the specified time, the strength of the vehicle fixing part is qualified. After the test, permanent deformation of the vehicle fixing part or its surrounding area is allowed, including partial breakage or damage of the fixing part and the connecting bolts (or connecting parts).

[0049] 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 multifunctional testing device for bus seat strength testing, comprising a control device, a test bench and a force-applying 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 force-applying component includes a vertical force-applying component and a horizontal force-applying component, wherein the vertical force-applying component is used to apply a constant load in a vertical direction to the seat plate of the seat to test the strength of the seat plate of the seat, and the horizontal force-applying component is used to apply a constant load in a horizontal direction to the back plate of the seat to test the strength of the back plate of the seat, and the control device is used to control the start and stop actions of the force-applying component; The test bench comprises a base and a bracket for carrying a seat, wherein the bracket comprises a plurality of upright posts with guide rails, and a plurality of upright posts are connected by a cross post to form the bracket; The vertical force-applying component includes a vertical cylinder and a vertical force-applying template connected to a push rod of the vertical cylinder, and the cylinder body of the vertical cylinder is connected to the guide rail of the column through a first liftable crossbeam, so that the vertical cylinder can move up and down relative to the column; The horizontal force-applying components are provided with at least one group, each group of which includes a horizontal cylinder and a horizontal force-applying template connected to the push rod of the horizontal cylinder, and the horizontal cylinder is connected to the guide rail of the column through a second liftable crossbeam, so that the horizontal cylinder can move up and down relative to the column; The front ends of the push rods of the vertical cylinder and the horizontal cylinder are connected to respective push plates, and the push plates are fixedly connected to the vertical force-applying template or the horizontal force-applying template; The push plate is also fixedly connected with a guide rod, which passes through the first liftable crossbeam and serves as a guide component when the push rod of the vertical cylinder performs telescopic movement, and the guide rod passes through the second liftable crossbeam and serves as a guide component when the horizontal cylinder performs telescopic movement; The vertical force application template is also connected to the backrest armrest of the seat through a force transmission component, and a vertical pulling force is applied to the backrest armrest to test the strength of the backrest armrest; The horizontal force application template is also connected to the backrest armrest of the seat through a force transmission component, and a horizontal pulling force is applied to the backrest armrest to test the strength of the backrest armrest.

2. The multifunctional testing device for bus seat strength testing according to claim 1, characterized in that: The horizontal force applying components are provided in two groups, and the two groups of horizontal force applying components are arranged in parallel up and down.

3. The multifunctional testing device for bus seat strength testing according to claim 1, characterized in that: The base of the test bench is also provided with a plurality of parallel "T"-shaped slots, and the support component of the seat or the vehicle fixing part of the seat is fixedly connected to the base of the test bench through bolts and the "T"-shaped slots.

4. The multifunctional testing device for bus seat strength testing according to claim 1, characterized in that: The base of the test bench is also used to fix the vehicle fixing part of the seat, and the vehicle fixing part is fixedly connected to the indirect force-receiving component. A constant load in the horizontal direction is applied to the indirect force-receiving component through the horizontal force-applying template to test the strength of the vehicle fixing part.

5. The multifunctional testing device for bus seat strength testing according to any one of claims 1 to 4, characterized in that: The bracket has four columns, which are arranged in the vertical direction and distributed in a rectangular shape. The lower ends of the columns are fixedly connected to the base, and the upper ends of the columns are connected through cross columns so that the bracket forms a stable frame. The cross columns include first cross columns and second cross columns. Two first cross columns are provided, each first cross column connects two columns, and the middle parts of the two first cross columns are connected through the second cross column.

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