Automobile seat headrest strength testing device

Abstract

The utility model discloses an automobile seat headrest strength testing device which comprises a fixing frame, a first telescopic hydraulic cylinder, a sliding block, a rotating frame, a second telescopic hydraulic cylinder, a sleeve, a guide block, a testing rod, a spherical surface testing head, a pressing plate, a touch switch, a guide rod and a spring. The rear end of a cylinder body of the first telescopic hydraulic cylinder is installed on the fixing frame in a hinged mode, and the sliding block is installed on the rotating frame in a sliding mode. When a gap is formed between the spherical testing head and the pressing plate, an electric signal of the touch switch is switched off, the control module controls the sound alarm device to remind that the installation strength of the headrest is unqualified, a tester does not need to manually detect and judge the headrest after the pressure maintaining test, and the headrest can be directly disassembled after being unqualified without waiting for the end of the static pressure test time. The testing efficiency is improved, and the testing precision can be improved through the testing device under the condition that a small amount of displacement of the headrest occurs.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile seat testing, in particular to a vehicle seat headrest strength testing device. Background Art

[0002] Car seats are held to the same importance as the entire vehicle, with their safety and comfort directly impacting the overall quality of the vehicle. Existing car seat headrest strength testing equipment requires an operator to inspect the headrest for deformation or displacement after the static pressure test. This testing method relies heavily on the tester, making it difficult for operators to detect even millimeter-level deformation or displacement, resulting in a lack of high test accuracy. Furthermore, during the static pressure test, the operator must wait 10-15 minutes before verifying the headrest's compliance, hindering testing efficiency. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a vehicle seat headrest strength testing device which has high testing accuracy, high testing efficiency and the ability to perform self-feedback alarm.

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: A car seat headrest strength testing device, including a fixed frame, a first telescopic hydraulic cylinder, a slider, a rotating frame, a second telescopic hydraulic cylinder, a sleeve, a guide block, a test rod, a spherical test head, a pressure plate, a touch switch, a guide rod, and a spring, the rotating frame is hingedly mounted on the fixed frame, the rear end of the cylinder body of the first telescopic hydraulic cylinder is hingedly mounted on the fixed frame, the slider is slidably mounted on the rotating frame, the piston rod of the first telescopic hydraulic cylinder is hingedly mounted on the slider, the cylinder body and sleeve of the second telescopic hydraulic cylinder are both fixedly mounted on the rotating frame, and the sleeve is fixedly mounted inside. The guide block is installed, and the test rod is slidably installed in the guide block. The rear end of the test rod is fixedly connected to the piston rod of the second telescopic hydraulic cylinder. The pressure plate is fixedly installed at the front end of the test rod. Four guide rods are distributed in a rectangular shape and fixedly installed on the spherical test head. The outer end of the guide rod is slidably installed on the pressure plate. The outer end of the guide rod is also fixedly sleeved with a limit ring. The spring is sleeved on the guide rod. The spherical test head and the pressure plate are correspondingly provided with accommodating grooves. The two ends of the spring act on the bottom of the accommodating groove. The touch switch is fixedly installed on the left plate surface of the pressure plate, and the right side surface of the spherical test head is provided with an accommodating notch that matches the touch switch.

[0005] Furthermore, an adjusting bolt is threadedly installed in the accommodating notch.

[0006] Furthermore, a guide sleeve is fixedly mounted on the pressing plate, and the guide rod is slidably mounted in the guide sleeve.

[0007] Furthermore, the sleeve and the guide block are fixed by screw threading.

[0008] Compared with the prior art, the benefits of the present invention are as follows: when the test device is performing a static pressure test on the strength of a car seat headrest, if the headrest is displaced during the pressure holding time, a gap will appear between the spherical test head and the pressure plate under the action of the spring force, the electrical signal of the touch switch will be disconnected, and the control module will control the sound alarm device to remind the user that the installation strength of the headrest is unqualified. The test personnel do not need to manually inspect and judge the headrest after the pressure holding test, and the headrest can be directly removed if it is unqualified without waiting for the static pressure test time to end, thereby improving the test operation efficiency. At the same time, when the headrest is slightly displaced, the test accuracy can be improved by using the present test device. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The present invention will be further described below with reference to the accompanying drawings.

[0010] Figure 1 It is a schematic diagram of the internal structure of the present utility model.

[0011] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure at M. DETAILED DESCRIPTION

[0012] The present invention is described in detail below in conjunction with specific embodiments:

[0013] like Figure 1 and Figure 2The vehicle seat headrest strength testing device shown in the figure includes a fixed frame 1, a first telescopic hydraulic cylinder 11, a slider 12, a rotating frame 2, a second telescopic hydraulic cylinder 3, a sleeve 4, a guide block 41, a test rod 5, a spherical test head 6, a pressure plate 7, a touch switch 71, a guide rod 8, and a spring 9. The rotating frame 2 is hingedly mounted on the fixed frame 1, the rear end of the cylinder body of the first telescopic hydraulic cylinder 11 is hingedly mounted on the fixed frame 1, the slider 12 is slidably mounted on the rotating frame 2, the piston rod of the first telescopic hydraulic cylinder 11 is hingedly mounted on the slider 12, the cylinder body and sleeve 4 of the second telescopic hydraulic cylinder 3 are both fixedly mounted on the rotating frame 2, the guide block 41 is fixedly mounted in the sleeve 4, the test rod 5 is slidably mounted in the guide block 41, and the test rod 5, the rear end is fixedly connected to the piston rod of the second telescopic hydraulic cylinder 3, the pressure plate 7 is fixedly mounted on the front end of the test rod 5, and four guide rods 8 are fixedly mounted on the spherical test head 6 in a rectangular distribution. The outer ends of the guide rods 8 are slidably mounted on the pressure plate 7, and the outer ends of the guide rods 8 are also fixedly sleeved with a limit ring 81. The spring 9 is sleeved on the guide rod 8. The spherical test head 6 and the pressure plate 7 are correspondingly provided with accommodating grooves, and the two ends of the spring 9 act on the bottom of the accommodating grooves. The touch switch 71 is fixedly mounted on the left side of the pressure plate 7, and the right side of the spherical test head 6 is provided with an accommodating notch 60 that cooperates with the touch switch 71. The control module and the sound alarm device are also included. The sound alarm device and the touch switch 71 are connected to the control module through a circuit.

[0014] An adjusting bolt 61 is threadedly installed in the accommodating notch 60. When the touch switch 71 is pressed onto the adjusting bolt 61, the switch is closed. By rotating the relative installation position of the adjusting bolt 61 and the spherical test head 6, the sensitivity of the touch switch 71 can be improved.

[0015] A guide sleeve 72 is fixedly mounted on the pressure plate 7, and the guide rod 8 is slidably mounted in the guide sleeve 72. Since the pressure plate 7 is relatively thin, the guiding effect of the guide sleeve 72 can improve the straightness of the guide rod 8 when it moves.

[0016] The sleeve 4 and the guide block 41 are screwed together and fixed by screws 42, so that the guide block 41 can be disassembled and replaced after being worn.

[0017] When performing a strength test on the headrest of the car seat 10, the first telescopic hydraulic cylinder 11 is started to drive the rotating frame 2 to rotate until the second telescopic hydraulic cylinder 3 is in a vertical state with the headrest and then stops. The piston rod of the second telescopic hydraulic cylinder 3 is started to extend, pushing the test rod 5, the pressure plate 7, and the spherical test head 6 to move outward. When the spherical test head 6 contacts the headrest, the test rod 5 and the pressure plate 7 continue to move outward to overcome the elastic force of the spring 9. The spring 9 is gradually compressed into the accommodating groove, the pressure plate 7 is pressed and contacted with the spherical test head 6, and the touch switch 71 contacts the spherical test head. After the test head 6 makes contact and moves, it sends an electrical signal to the control module until the test pressure between the spherical test head 6 and the headrest reaches a preset value. The second telescopic hydraulic cylinder 3 stops moving and a pressure holding test is performed. When the static pressure test holding time is reached, the headrest installation strength is qualified. If the headrest is displaced during the static pressure test holding time, the spherical test head 6 is pushed to separate from the pressure plate 7 under the action of the elastic force of the spring 9. At this time, the electrical signal of the touch switch 71 is disconnected, and the control module controls the sound alarm device, indicating that the headrest installation strength is unqualified.

Claims

1. A vehicle seat headrest strength testing device, characterized by: The invention comprises a fixed frame (1), a first telescopic hydraulic cylinder (11), a slider (12), a rotating frame (2), a second telescopic hydraulic cylinder (3), a sleeve (4), a guide block (41), a test rod (5), a spherical test head (6), a pressure plate (7), a touch switch (71), a guide rod (8), and a spring (9), wherein the rotating frame (2) is hingedly mounted on the fixed frame (1), the rear end of the cylinder body of the first telescopic hydraulic cylinder (11) is hingedly mounted on the fixed frame (1), the slider (12) is slidably mounted on the rotating frame (2), the piston rod of the first telescopic hydraulic cylinder (11) is hingedly mounted on the slider (12), the cylinder body and the sleeve (4) of the second telescopic hydraulic cylinder (3) are both fixedly mounted on the rotating frame (2), the guide block (41) is fixedly mounted in the sleeve (4), the test rod (5) The test rod (5) is slidably mounted in the guide block (41), the rear end of the test rod (5) is fixedly connected to the piston rod of the second telescopic hydraulic cylinder (3), the pressure plate (7) is fixedly mounted on the front end of the test rod (5), and four guide rods (8) are fixedly mounted on the spherical test head (6) in a rectangular distribution. The outer ends of the guide rods (8) are slidably mounted on the pressure plate (7), and the outer ends of the guide rods (8) are also fixedly sleeved with a limit ring (81). The spring (9) is sleeved on the guide rods (8). The spherical test head (6) and the pressure plate (7) are correspondingly provided with accommodating grooves, and the two ends of the spring (9) act on the bottom of the accommodating groove. The touch switch (71) is fixedly mounted on the left side of the pressure plate (7), and the right side of the spherical test head (6) is provided with an accommodating notch (60) that matches the touch switch (71).

2. The vehicle seat headrest strength testing device according to claim 1, characterized in that: An adjusting bolt (61) is threadedly installed in the accommodating notch (60).

3. The vehicle seat headrest strength testing device according to claim 1, characterized in that: A guide sleeve (72) is fixedly mounted on the pressure plate (7), and the guide rod (8) is slidably mounted in the guide sleeve (72).

4. The vehicle seat headrest strength testing device according to claim 1, characterized in that: The sleeve (4) and the guide block (41) are screwed together and fixed by screws (42).

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