A tensile testing device

Abstract

This invention discloses a tensile testing device, including a base and a tensile device disposed on the base for providing tensile force to the test piece. The tensile device is connected to a traction component for connecting to the test piece. The base also has a lifting device for allowing the test piece to move vertically and an adjustment device disposed between the lifting device and the tensile device. The adjustment device drives the traction component to move, thereby adjusting the direction of the tensile force on the test piece. This tensile testing device is not affected by the testing site, requires less manpower, can test different types of test pieces, and also satisfies the multi-functional testing requirement of a single base, such as tensile testing of auxiliary components of the test piece. Furthermore, this tensile testing device is accurate, convenient, and quick to use, not only improving work efficiency but also solving safety issues associated with manual testing.

Description

Technical Field

[0001] This invention relates to the field of automobile manufacturing technology, and in particular to a tensile testing device. Background Technology

[0002] As people's living standards improve, they are paying more and more attention to travel safety. The automotive industry has also established standards and testing standards for various components related to safety issues, and the safety of seats has also been subject to corresponding standards.

[0003] Seat quality directly impacts driver safety, and currently, accurate measurement of seat tensile strength is still unavailable. Existing seat tensile performance tests require installing the seat in the vehicle, securing it with ropes, suspending the ropes with a crane, determining the required test angle, and applying the necessary tensile force to the upper rear of the seat. The tensile test then determines whether the seat meets design requirements. However, current tensile testing methods require manual operation, making it difficult to control the standard test angle, and ensuring consistent control over the magnitude of the tensile force and adjustments in different directions and positions. Furthermore, manual tensile testing poses a significant safety hazard to the testing personnel.

[0004] Therefore, how to avoid affecting the accuracy of seat testing due to manual operation is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a tensile testing device that can accurately test the tensile strength of seats, is convenient and quick to use, not only improves work efficiency, but also avoids the safety issues of manual operation.

[0006] To achieve the above objectives, the present invention provides a tensile testing device, including a base and a tensile device disposed on the base for providing tensile force to a test piece. The tensile device is connected to a traction component for connecting to the test piece. The base is further provided with a lifting device for allowing the test piece to move in a vertical direction and an adjustment device disposed between the lifting device and the tensile device. The traction component is moved by the adjustment device to adjust the direction of the tensile force on the test piece.

[0007] Optionally, the base includes a first body and a second body. The first body has an opening slot for mounting the lifting device and a plate assembly for fixing the adjusting device. The second body has mounting holes for fixing the tensioning device.

[0008] Optionally, the plate assembly includes two vertical plates for fixing the adjustment device, and the two vertical plates are connected by a horizontal plate.

[0009] Optionally, the lifting device includes a cylinder seat and a lifting shaft that can telescopically move relative to the cylinder seat, and the lifting shaft can extend out of the opening slot.

[0010] Optionally, the top end of the lifting shaft is connected to a mounting plate, which is used to install the test piece. The first body is also provided with a mounting groove that nests with the mounting plate. The mounting plate is provided with a plurality of first screw holes, and the mounting groove is provided with a plurality of second screw holes that correspond one-to-one with the first screw holes for bolt connection to fix the mounting plate.

[0011] Optionally, the lifting shaft is connected to the first body via a radial thrust rolling bearing.

[0012] Optionally, the adjustment device includes two cylinders fixed to the plate assembly and two cylinder shafts corresponding to the cylinders. The top ends of the two cylinder shafts are connected to an adjustment beam, and the middle of the adjustment beam is provided with a first hook for the traction assembly to pass over.

[0013] Optionally, the pulling device includes a motor mounting base fixed to the second body and a forward and reverse motor mounted on the motor mounting base. The forward and reverse motor has a rotating shaft and a winding coil disposed on the rotating shaft and connected to the traction assembly.

[0014] Optionally, the base is further provided with a second hook for guiding the traction assembly and preventing the traction assembly from deviating.

[0015] Optionally, the traction assembly includes a rope, a force sensor, and a hook, with the force sensor connected between the rope and the hook.

[0016] Compared to the aforementioned background technology, this invention designs a tensile testing device to address different requirements of seat tensile testing. Currently, seat tensile testing suffers from problems such as difficulty in installing different seat models, human error in manual tensile testing, difficulty in controlling the test tensile force, inconsistent complexity and repeatability of multiple seat tensile tests, safety concerns, and low efficiency in manual testing. Therefore, it is necessary to provide a tensile testing device that can solve the above problems.

[0017] Specifically, the aforementioned tensile testing equipment includes a base, a lifting device, an adjusting device, a tensile device, and a traction assembly. The lifting device, adjusting device, and tensile device are all mounted on the base. One end of the traction assembly is connected to the tensile device, and the other end is connected to the test piece. The tensile device provides tensile force to the test piece, the lifting device allows the test piece to move vertically, and the adjusting device is located between the lifting device and the tensile device. The adjusting device drives the traction assembly to adjust the direction or angle of the tensile force on the test piece. Thus, during the tensile test, the test piece is mounted on top of the lifting device, and the traction assembly is used to hold the front end of the test piece. The adjusting device is slowly raised until the traction assembly reaches the corresponding test angle, and then the tensile device is activated, putting the traction assembly in a taut state, thereby achieving tensile testing of the test piece under corresponding tensile force magnitude, direction, and angle.

[0018] The aforementioned tensile testing equipment is not affected by the test site, requires little manpower, can test different types of test pieces, and also meets the multi-functional testing requirements of a single base, such as tensile testing of auxiliary parts of the test piece; at the same time, the tensile testing equipment is accurate and convenient to use, which can not only improve work efficiency, but also solve the safety problems of manual testing. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the tensile testing equipment provided in an embodiment of the present invention;

[0021] Figure 2 This is a structural schematic diagram of the tensile testing equipment provided in an embodiment of the present invention from another angle;

[0022] Figure 3 for Figure 1 A schematic diagram of the central lifting device.

[0023] in:

[0024] 01-Test piece, 1-Base, 11-First body, 111-Opening slot, 112-Plate assembly, 1121-Vertical plate, 1122-Horizontal plate, 113-Mounting slot, 12-Second body, 13-Second hook, 2-Lifting device, 21-Cylinder seat, 22-Lifting shaft, 23-Radial thrust rolling bearing, 24-Mounting plate, 3-Adjusting device, 31-Cylinder barrel, 32-Cylinder shaft, 33-First hook, 34-Adjusting beam, 4-Tension device, 41-Motor mounting seat, 42-Forward and reverse motor, 43-Winding coil, 44-Rotating shaft, 5-Traction assembly, 51-Rope, 52-Force sensor, 53-Hook. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] The core of this invention is to provide a tensile testing device that can accurately test the tensile strength of seats, is convenient and quick to use, not only improves work efficiency, but also avoids the safety issues of manual operation.

[0027] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] It should be noted that the directional terms such as "upper end," "lower end," "left side," and "right side" mentioned below are defined based on the accompanying drawings in the instruction manual.

[0029] Please refer to Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a schematic diagram of the tensile testing equipment provided in an embodiment of the present invention; Figure 2 This is a structural schematic diagram of the tensile testing equipment provided in an embodiment of the present invention from another angle; Figure 3 for Figure 1 A schematic diagram of the central lifting device.

[0030] The tensile testing equipment provided in this embodiment of the invention can be used for tensile testing of automobile seats and seat accessories (such as seat belts or seat belt retractor locking devices). The equipment includes a base 1, a lifting device 2, an adjusting device 3, a tensile device 4, and a traction component 5. The lifting device 2, the adjusting device 3, and the tensile device 4 can be respectively located at the front end, middle end, and rear end of the base 1. One end of the traction component 5 is connected to the tensile device 4, and the other end is connected to the test piece 01. The tensile device 4 is used to provide tensile force to the test piece 01. The lifting device 2 is used to allow the test piece 01 to move in the vertical direction, thereby adjusting the height of the test piece 01. The adjusting device 3 is located between the lifting device 2 and the tensile device 4. The adjusting device 3 drives the traction component 5 to move to adjust the angle or direction of the tensile force on the test piece 01.

[0031] Of course, depending on actual needs, the above-mentioned traction component 5 includes a rope 51, a force sensor 52 and a hook 53, wherein the force sensor 52 is connected between the rope 51 and the hook 53, one end of the rope 51 is connected to the tension device 4, and the other end is connected to the force sensor 52.

[0032] It should be noted that, according to the testing standards, the fixing brackets between the seat and the battery cover or engine hood of a counterbalanced vehicle, as well as the locking device between the cover and the vehicle chassis, should have sufficient strength when flipped backward from the fixed plane. The seat fixing brackets should be able to withstand a force of 2250N applied in the (45±5)° direction. The connection between the traction assembly 5 and the seat can refer to the existing technology.

[0033] In this way, during the tensile test, the test piece 01 is installed on the top of the lifting device 2, and the front end of the test piece 01 is covered by the traction component 5; the adjusting device 3 is slowly lifted until the traction component 5 reaches the corresponding test angle, and then the tensile device 4 is turned on to put the traction component 5 in a taut state, so as to realize the tensile test of the test piece 01 under the corresponding tensile force magnitude and direction (angle).

[0034] The aforementioned tensile testing equipment is not affected by the test site, requires little manpower, and can test different models of test pieces 01. It also meets the multi-functional testing requirements of a single base 1, such as tensile testing of auxiliary components of the test piece 01 (tensile testing of seat belts and tensile testing of seat belt retractor locking devices). At the same time, the tensile testing equipment is accurate and convenient to use, which can not only improve work efficiency but also solve the safety problems of manual testing.

[0035] Specifically, the base 1 can be configured as a base 1 assembled from large sheet metal parts. The base 1 can include a first body 11 and a second body 12. The height of the first body 11 is greater than the height of the second body 12. The first body 11 is used to install the lifting device 2 and the adjusting device 3, and the second body 12 is used to install the tensioning device 4. The first body 11 is provided with an opening slot 111 for installing the lifting device 2 and a plate assembly 112 for fixing the adjusting device 3. The second body 12 is provided with a mounting hole for fixing the tensioning device 4. The mounting hole can be configured as a threaded hole.

[0036] The top surface of the first body 11 is also provided with a connection hole for the lifting shaft 22 of the lifting device 2 to extend out of the opening slot 111; the plate assembly 112 can be specifically configured to include two vertical plates 1121 for fixing and installing the adjustment device 3, the two vertical plates 1121 are connected by a horizontal plate 1122 (or a horizontal bar), and the structure of the vertical plate 1121 can be configured as a trapezoidal plate.

[0037] The aforementioned lifting device 2 can be configured as a hydraulic cylinder, including a cylinder seat 21 and a lifting shaft 22 that can extend and retract relative to the cylinder seat 21. The bottom of the cylinder seat 21 is connected to the first body 11, and the lifting shaft 22 can extend out of the opening slot 111. The aforementioned lifting device 2 can directly input a fixed amount of hydraulic oil through the hydraulic oil inlet to realize the extension and retraction of the lifting shaft 22.

[0038] In addition, a mounting plate 24 is connected to the top of the lifting shaft 22. The mounting plate 24 is used to mount the test piece 01. Correspondingly, the first body 11 is also provided with a mounting groove 113 that nests with the mounting plate 24. The mounting plate 24 is provided with several first screw holes, and the mounting groove 113 is provided with several second screw holes that correspond one-to-one with the first screw holes for bolt connection to fix the mounting plate 24. When the mounting plate 24 is embedded in the mounting groove 113, the mounting plate 24 can be fixed and locked by screwing the bolts into the first screw holes and the corresponding second screw holes in succession, so as to ensure that the lifting device 2 is not damaged during the seat tensile test. The mounting plate 24 is also provided with mounting holes of unequal spacing to facilitate the installation and fixing of different models of seats.

[0039] More specifically, the lifting shaft 22 is connected to the first body 11 via a radial thrust bearing 23, which is located within the connecting hole. When the lifting shaft 22 pushes the mounting plate 24 away from the mounting groove 113, the lifting shaft 22 can rotate relative to the base 1 under the action of the radial thrust bearing 23, thereby adjusting the seat's orientation. It should be noted that the seat cannot rotate when the mounting plate 24 is embedded in the mounting groove 113; the seat can only rotate when the mounting plate 24 is pushed away from the mounting groove 113. Of course, the seat's height and orientation can also be adjusted in other ways, such as using a ball screw. The configuration of the radial thrust bearing 23 or the ball screw can be found in existing technology and will not be elaborated upon here.

[0040] In this embodiment, the adjusting device 3 may be configured to include two cylinders 31 fixed on the plate assembly 112 and two cylinder shafts 32 that correspond one-to-one with the cylinders 31. The top ends of the two cylinder shafts 32 are connected to an adjusting crossbeam 34. The middle of the adjusting crossbeam 34 is provided with a first hook 33 for the traction assembly 5 to pass around. The first hook 33 is located on the adjusting crossbeam 34 near the tension device 4, that is, at the rear, so as to guide the rope 51.

[0041] The two cylinders 31 can be fixed to the two vertical plates 1121 of the first body 11 by bolts respectively, and the two cylinder shafts 32 can move up and down synchronously; the height of the first hook 33 can be adjusted by the up and down movement of the two cylinder shafts 32 so that the first hook 33 and the seat maintain a test angle required for the test, which is the angle at which the rope 51 applies tension to the seat.

[0042] To optimize the above embodiment, the base 1 is further provided with a second hook 13 for guiding the traction component 5 and preventing the traction component 5 from deviating. The second hook 13 is provided on the second body 12 and is adjacent to the first body 11.

[0043] Furthermore, the tensioning device 4 can be configured to include a motor mounting base 41 fixed to the second body 12 and a forward / reverse motor 42 fixed to the motor mounting base 41. The forward / reverse motor 42 has a rotating shaft 44 and a winding coil 43 disposed on the rotating shaft 44 and connected to the traction assembly 5. The motor mounting base 41 is firmly fixed to the second body 12 by bolts. The spline groove of the rotating shaft 44 at the front end of the forward / reverse motor 42 matches the mounting hole of the winding coil 43, and the winding coil 43 is fixed to the rotating shaft 44 by bolts in the middle.

[0044] It is important to note that the winding coil 43, the second hook 13, and the first hook 33 are all positioned in the middle of the base 1 to ensure the stability of the tensile test. In this way, one end of the rope 51 is bound to the winding coil 43, passing over both the first hook 33 and the second hook 13, while the other end is connected to the force sensor 52. The other end of the force sensor 52 is connected to the pull hook 53. This design allows for real-time monitoring of the tension value of the rope 51 during the test. Of course, different pull hooks 53 can be used depending on the specific tensile test.

[0045] In summary, the following operating procedures can be followed during the experiment:

[0046] Install the lower end of the seat onto the mounting plate 24, and then put the traction assembly 5 onto the front end of the seat;

[0047] Slowly raise the two cylinder shafts 32 of the adjusting device 3 until the rope 51 reaches the corresponding test angle;

[0048] Start the forward and reverse motor 42 (forward rotation) to put the rope 51 in a taut state, and then stop the forward and reverse motor 42 after the force sensor 52 is returned to zero;

[0049] Restart the forward and reverse motor 42 to make the tension sensor 52 reach the force required for the seat tension test.

[0050] Once the above operations are completed, a seat tension test can be performed.

[0051] After one test, start the forward and reverse motor 42 (reverse) again to put the rope 51 in a state of no force and release the rope 51 on the seat;

[0052] Start the lifting device 2 to lift the mounting plate 24 away from the base 1, rotate the seat angle, then lower the lifting device 2 to fix the mounting plate 24, and repeat tests 1-4 to complete the seat tension test in different positions.

[0053] In addition, the hook 53 on the rope 51 can be replaced to conduct tensile tests on the seat belt and the seat belt retractor locking device. As long as the angle and force of the tension are maintained during the test, a series of seat tensile tests can be completed successfully. The tensile tests on the seat belt and the seat belt retractor locking device can be performed in accordance with existing technical standards.

[0054] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0055] The tensile testing equipment provided by this invention has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the solution and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A tensile testing device, characterized in that, The device includes a base (1) and a tension device (4) provided on the base (1) for providing tension to the test piece (01). The tension device (4) is connected to a traction assembly (5) for connecting to the test piece (01). The base (1) is also provided with a lifting device (2) for allowing the test piece (01) to move in the vertical direction and an adjustment device (3) provided between the lifting device (2) and the tension device (4). The adjustment device (3) drives the traction assembly (5) to move, so as to adjust the direction of the tension on the test piece (01). The base (1) includes a first body (11), which has an opening slot (111) for mounting the lifting device (2). The lifting device (2) includes a cylinder seat (21) and a lifting shaft (22) that can extend and retract relative to the cylinder seat (21), and the lifting shaft (22) can extend out of the opening slot (111). The top surface of the first body (11) also has a connecting hole for the lifting shaft (22) of the lifting device (2) to extend out of the opening slot (111). The top end of the lifting shaft (22) is connected to a mounting plate (24), which is used to install the test piece (01). The first body (11) is also provided with a mounting groove (113) that nests with the mounting plate (24). The lifting shaft (22) is connected to the first body (11) through a radial thrust rolling bearing (23). The mounting plate (24) is also provided with mounting holes of unequal spacing to facilitate the installation and fixing of test pieces (01) of different models. When the mounting plate (24) is embedded in the mounting groove (113), the test piece (01) cannot rotate. Only when the mounting plate (24) is pushed away from the mounting groove (113) can the test piece (01) rotate.

2. The tensile testing equipment according to claim 1, characterized in that, The base (1) also includes a second body (12), the first body (11) having a plate assembly (112) for fixing the adjustment device (3), and the second body (12) having mounting holes for fixing the tension device (4).

3. The tensile testing equipment according to claim 2, characterized in that, The plate assembly (112) includes two vertical plates (1121) for fixing the adjustment device (3) and the two vertical plates (1121) are connected by a horizontal plate (1122).

4. The tensile testing equipment according to claim 1, characterized in that, The mounting plate (24) has a plurality of first screw holes, and the mounting groove (113) has a plurality of second screw holes that correspond one-to-one with the first screw holes for bolt connection to fix the mounting plate (24).

5. The tensile testing equipment according to claim 2, characterized in that, The adjustment device (3) includes two cylinders (31) fixed on the plate assembly (112) and two cylinder shafts (32) that correspond one-to-one with the cylinders (31). The top ends of the two cylinder shafts (32) are connected to an adjustment beam (34). The middle of the adjustment beam (34) is provided with a first hook (33) for the traction assembly (5) to pass around.

6. The tensile testing equipment according to claim 2, characterized in that, The tensioning device (4) includes a motor mounting base (41) fixed on the second body (12) and a forward and reverse motor (42) mounted on the motor mounting base (41). The forward and reverse motor (42) is provided with a rotating shaft (44) and a winding coil (43) provided on the rotating shaft (44) and connected to the traction assembly (5).

7. The tensile testing apparatus according to any one of claims 1 to 5, characterized in that, The base (1) is also provided with a second hook (13) for guiding the traction component (5) to prevent the traction component (5) from deviating.

8. The tensile testing equipment according to claim 7, characterized in that, The traction assembly (5) includes a rope (51), a force sensor (52), and a hook (53), wherein the force sensor (52) is connected between the rope (51) and the hook (53).

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