Device and method for testing the life of electric push rods

Abstract

The present invention provides a device and method for life testing of electric push rods, belonging to the technical field of testing devices. The device includes a test frame base, a mid-section position adjustment component, a tailstock bracket, a control component and a load component. The test frame base is used as an installation base. The mid-section position adjustment component is used to adjust the electric push rod to be tested to the mid-section position. The tailstock bracket is used to fix the electric push rod to be tested and move with the mid-section position adjustment component. The control component is used to control the movement of the mid-section position adjustment component and the electric push rod to be tested. The load component is used to fix the electric push rod to be tested and provide a load counterweight. The above-mentioned device can effectively simulate and verify the two failure risks of single-point wear accumulation of the electric push rod and self-locking of the telescopic rod angle, which is more in line with the actual use scenario of the electric push rod, making the test results more accurate, and can more scientifically and effectively guide the improvement of the reliability of the electric push rod. In addition, the present device can also adapt to electric push rods of different lengths and different strokes to carry out life tests.

Description

Technical Field

[0001] The present invention relates to a testing device, and in particular to a device and method for testing the life of an electric push rod. Background Art

[0002] Electric push rods are often used in the mechanism modules of kitchen appliances. As driving components, electric push rods play a vital role in the mechanism modules. Their reliability determines the stable operation of the mechanism modules.

[0003] To verify the reliability of electric push rods and identify problems in advance to improve their structure, it is necessary to conduct endurance life tests on them. The current testing method used by various manufacturers is: the push rods are arranged vertically or horizontally, a load rope is connected to the front end of the push rods, and the push rods pull the load rope to perform a telescopic movement to conduct life tests.

[0004] The aforementioned test device has two unresolved shortcomings: First, it operates under a constant load, with no force fluctuations on the push rod. The test operation state is relatively biased, resulting in relatively uniform wear on all parts, making it impossible to simulate the potential failure risk of cumulative wear at a single point. Second, the test process does not include the influence of the push rod's own weight, making it impossible to simulate the potential failure risk of the push rod's telescopic rod's self-locking angle. These two failure modes have a significant impact on the reliability of the push rod. The aforementioned test device cannot effectively simulate the test, necessitating the invention of a completely new test device and method. Summary of the Invention

[0005] The purpose of the present invention is to provide a device for testing the life of an electric push rod. The device effectively simulates and verifies the two failure risks of single-point wear accumulation of the electric push rod and self-locking of the telescopic rod angle. It is more in line with the actual use scenarios of the electric push rod, making the test results more accurate, and can more scientifically and effectively guide the improvement of the reliability of the electric push rod.

[0006] The present invention also aims to provide a testing method using the above device.

[0007] To achieve the purpose of the present invention, the present invention adopts the following technical solutions:

[0008] According to one aspect of the present invention, there is provided a device for testing the life of an electric push rod, comprising:

[0009] A test stand base, provided on the test platform and serving as a mounting base for other components of the device except the test stand base;

[0010] A mid-section position adjustment component is installed at the rear end of the test stand base and is used to adjust the electric push rod to be tested to the mid-section position;

[0011] A tailstock support, mounted on the middle position adjustment assembly, is used to fix the end of the electric push rod to be tested and moves with the middle position adjustment assembly;

[0012] A control assembly, mounted on the test stand base, for controlling the movement of the mid-section position adjustment assembly and the electric push rod to be tested; and

[0013] The load assembly is installed at the front end of the test stand base and is used to fix the front end of the electric push rod to be tested and provide a load counterweight.

[0014] According to one embodiment of the present invention, the front end and the rear end of the test stand base are respectively provided with a first protrusion and a second protrusion, the first protrusion is used to install the load assembly, and the second protrusion is higher in the front and lower in the back, and is used to install the middle position adjustment assembly, so that the middle position adjustment assembly can slide along the second protrusion.

[0015] According to one embodiment of the present invention, the mid-section position adjustment component includes:

[0016] a slider, mounted on the test stand base and capable of sliding relative to the test stand base; and

[0017] The telescopic adjustment push rod has its end mounted on the rear end of the test stand base through a quick-release structure, and its head end mounted on the slider through a quick-release structure, and drives the slider to slide.

[0018] According to one embodiment of the present invention, the mid-section position adjustment assembly further comprises:

[0019] A scale, mounted on the base of the test stand, for quickly finding the middle position; and

[0020] A notch is formed at the tailstock support for aligning the scale in the scale.

[0021] According to an embodiment of the present invention, the end of the electric push rod to be tested is installed on the tailstock bracket through a quick-release structure.

[0022] According to one embodiment of the present invention, the control component includes:

[0023] Control buttons, used to generate external control instructions; and

[0024] The controller is connected to the control button, the middle position adjustment component and the electric push rod to be tested, and is used to receive the external control instructions of the control button and convert them into internal control instructions to control the operation of the middle position adjustment component and the electric push rod to be tested.

[0025] According to one embodiment of the present invention, the load assembly includes:

[0026] A load simulation frame, comprising a counterweight frame and a support frame, wherein the counterweight frame is arranged in a horizontal direction, has a slot at one end for mounting a counterweight block, and is connected to the support frame at the other end, and the angle between the support frame and the counterweight frame is an obtuse angle; and

[0027] The counterweight block is inserted into the slot of the counterweight frame.

[0028] According to an embodiment of the present invention, when the electric push rod to be tested is located at a middle position, an angle between a push rod center line of the electric push rod to be tested and a center line of the support frame is a right angle.

[0029] According to another aspect of the present invention, a method for testing the life of the electric push rod described above is provided, and the method is performed according to the following steps:

[0030] Install the electric push rod to be tested in place, obtain relevant data of the electric push rod to be tested, and calculate the initial middle position of the electric push rod to be tested;

[0031] Adjust the electric push rod to be tested to the initial middle position, and after all the installation connections are reliable, click the control component, the life test begins, the control component drives the electric push rod to be tested to extend into place and reach the current limit A1 to stop, after an interval of 2s, the control component drives the electric push rod to be tested to retract into place and reach the current limit A2 to stop, this is one cycle, after an interval of 2s, enter the next cycle, until it stops working after running 30,000 times, and the test is completed.

[0032] According to one embodiment of the present invention, the relevant data includes the stroke L1 of the electric push rod to be tested and the minimum retracted length L2 of the electric push rod to be tested, and the initial middle position L0 is calculated, L0=L2+L1 / 2.

[0033] An embodiment of the present invention has the following advantages or beneficial effects:

[0034] The present invention's device for testing the life of an electric push rod includes a test stand base, a mid-section position adjustment assembly, a tailstock bracket, a control assembly, and a load assembly. This device can effectively simulate and verify two failure risks: accumulated single-point wear on the push rod and self-locking of the telescopic rod angle. This device better fits the actual use scenarios of the push rod, making the test results more accurate and providing more scientific and effective guidance for improving the reliability of the push rod. Furthermore, the device can also be adapted to carry out life tests on push rods of different lengths and travels. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the accompanying drawings.

[0036] Figure 1 is a schematic perspective view of a device for testing the life of an electric push rod according to an exemplary embodiment;

[0037] Figure 2 is based on Figure 1 A schematic perspective view showing the mid-section position adjustment assembly and its mounting relationship with the test stand base;

[0038] Figure 3 is based on Figure 1 A schematic perspective view showing the installation state of the electric push rod to be tested before testing;

[0039] Figure 4 is based on Figure 1 A schematic perspective view showing the installation relationship between the control assembly, the test stand base, and the mid-section position adjustment assembly;

[0040] Figure 5 is based on Figure 1 A schematic three-dimensional diagram showing the installation relationship between the electric push rod to be tested and the test frame base, the middle position adjustment component, the control component and the load component;

[0041] Figure 6 is based on Figure 1 A schematic perspective view showing a measuring scale structure in a mid-section position adjustment assembly;

[0042] Figure 7 is based on Figure 1 A schematic three-dimensional diagram showing the installation relationship between the load assembly, the test frame base, the mid-section position adjustment assembly and the control assembly.

[0043] The description of the accompanying drawings is as follows:

[0044] 100 devices,

[0045] 10 test stand base, 11 first protrusion, 12 second protrusion,

[0046] 20 middle position adjustment component, 21 slider, 22 telescopic adjustment push rod, 23 scale,

[0047] 30 tailstock support, 31 notch,

[0048] 40 control component, 41 control button, 411 middle position reduction button, 412 test start button, 413 middle position increase button, 42 controller,

[0049] 50 load assembly, 51 load simulation frame, 511 counterweight frame, 512 support frame, 52 counterweight block,

[0050] 60 electric push rods to be tested,

[0051] 70 quick release structure, 71 pin, 72 bushing, 73 cotter pin. DETAILED DESCRIPTION

[0052] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0053] The terms "a", "an", "the", and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.

[0054] like Figure 1-Figure 7 As shown, Figure 1 is a schematic perspective view of a device for testing the life of an electric push rod according to an exemplary embodiment. Figure 2 is based on Figure 1 A schematic perspective view showing the mid-section position adjustment assembly and its installation relationship with the test stand base. Figure 3 is based on Figure 1 A schematic three-dimensional diagram showing the installation state of the electric push rod to be tested before testing. Figure 4 is based on Figure 1 A schematic three-dimensional diagram showing the installation relationship between the control component, the test frame base and the mid-section position adjustment component. Figure 5 is based on Figure 1 A schematic three-dimensional diagram showing the installation relationship between the electric push rod to be tested and the test frame base, the middle position adjustment component, the control component and the load component. Figure 6 is based on Figure 1 A schematic perspective view showing the structure of the measuring scale in the mid-section position adjustment assembly. Figure 7 is based on Figure 1 A schematic three-dimensional diagram showing the installation relationship between the load assembly, the test frame base, the mid-section position adjustment assembly and the control assembly.

[0055] like Figure 1 See also Figure 2-Figure 7The device 100 for testing the life of an electric push rod in this embodiment can generally include: a test frame base 10, a mid-section position adjustment component 20, a tailstock support 30, a control component 40, and a load component 50. The test frame base 10 is set on the test platform and can be installed on the test platform by screws during implementation. The test frame base 10 serves as an installation base for other parts in the device 100 except the test frame base 10. The mid-section position adjustment component 20 is installed at the rear end of the test frame base 10 and is used to adjust the electric push rod 60 to be tested to the mid-section position. The tailstock support 30 is installed at the mid-section position adjustment component 20 and is used to fix the end of the electric push rod 60 to be tested and move with the mid-section position adjustment component 20. The control component 40 is installed at the test frame base 10 and is used to control the movement of the mid-section position adjustment component 20 and the electric push rod 60 to be tested. The load component 50 is installed at the front end of the test frame base 10 and is used to fix the front end of the electric push rod 60 to be tested and provide a load counterweight.

[0056] In this example, if Figure 1 As shown, through the above structure, the electric push rod 60 to be tested simulates the actual installation environment, takes into account the influence of the deadweight of the electric push rod 60 to be tested, and the load is close to the actual load, which can effectively simulate the actual test and obtain more accurate test results. Therefore, this embodiment can effectively simulate and verify the two failure risks of single-point wear accumulation of the electric push rod and self-locking of the telescopic rod angle, which is more in line with the actual use scenario of the electric push rod, making the test results more accurate and guiding the improvement of the reliability of the electric push rod in a more scientific and effective way.

[0057] In this example, if Figure 1 As shown, the middle position adjustment component 20 can be electrically adjusted through the control component 40, and can be adapted to carry out life tests on the electric push rods 60 to be tested with different lengths and different strokes.

[0058] In this example, the load simulation frame 51 can add or remove counterweights 52 according to actual test needs to meet different load test requirements.

[0059] In a preferred embodiment of the present invention, Figure 1 As shown, the front end of the test stand base 10 is provided with a first protrusion 11 for mounting the load assembly 50. The rear end of the test stand base 10 is provided with a second protrusion 12, which is higher in the front and lower in the back, for mounting the mid-section position adjustment assembly 20, allowing the mid-section position adjustment assembly 20 to slide along the second protrusion 12.

[0060] In a preferred embodiment of the present invention, Figure 2 See also Figure 1 、 Figure 3-Figure 7The middle position adjustment assembly 20 includes: a slider 21 and a telescopic adjustment push rod 22. The slider 21 is inserted into the second protrusion 12 of the test frame base 10. The slider 21 can slide relative to the second protrusion 12 of the test frame base 10, and can limit the pin 1 from falling out during the sliding process. The end of the telescopic adjustment push rod 22 is installed at the rear end hole of the test frame base 10 through a quick release structure 70. The head end of the telescopic adjustment push rod 22 is installed on the slider 21 through the quick release structure 70, and drives the slider 21 to slide. Each quick release structure 70 includes a pin 1, a shaft sleeve 72, and a cotter pin 73.

[0061] In a preferred embodiment of the present invention, Figure 6 See also Figure 1-Figure 5 The mid-section position adjustment assembly 20 further includes a scale 23 and a notch 31. The scale 23 is mounted on the test stand base 10 and is used to quickly find the mid-section position. The notch 31 is formed in the tailstock support 30 and is used to align the scale on the scale 23.

[0062] In a preferred embodiment of the present invention, Figure 3 See also Figure 5 The end of the electric push rod 60 to be tested is mounted on the tailstock support 30 through a quick release structure 70. Figure 5 As shown, the tailstock support 30 is fixed to the top surface of the slider 21 by mounting bolts. The front end of the electric push rod to be tested is installed through the quick release structure 70 and the top hole of the load assembly 50. Each quick release structure 70 includes a pin 1, a shaft sleeve 72, and a cotter pin 73.

[0063] In a preferred embodiment of the present invention, Figure 4 See also Figure 1-Figure 3 , Figure 5-Figure 7 , the control assembly 40 includes: a control button 41 and a controller 42. The control button 41 is used to generate external control instructions. The control button 41 may include a test start button 412, a mid-section position reduction button 411, and a mid-section position increase button 413, all of which are installed on the side facade of the test frame base 10. The controller 42 is connected to the control button 41, the mid-section position adjustment component 20 and the electric push rod to be tested 60, and is used to receive the external control instructions of the control button 41 and convert them into internal control instructions, controlling the mid-section position adjustment component 20 and the electric push rod to be tested 60 to work. The controller 42 is fixed to the inner side of the test frame base 10 by mounting bolts. During specific implementation, the controller 42 can be implemented by a chip, and can also be implemented by a chip and a signal circuit.

[0064] In a preferred embodiment of the present invention, Figure 7 See also Figures 1-6 The load assembly 50 includes a load simulation frame 51 and a counterweight 52. Figure 7As shown, the load simulation frame 51 is mounted to the test frame base 10 via a pin 1 and a cotter pin 73. The load simulation frame 51 includes a counterweight frame 511 and a support frame 512. The counterweight frame 511 is arranged horizontally. One end of the counterweight frame 511 has a slot for mounting a counterweight 52. The other end of the counterweight frame 511 is connected to the support frame 512. The included angle between the support frame 512 and the counterweight frame 511 is an obtuse angle. The counterweight 52 is inserted into the slot of the counterweight frame 511.

[0065] In a preferred embodiment of the present invention, Figure 1 As shown, when the electric push rod 60 to be tested is in the middle position, the angle between the push rod centerline of the push rod 60 to be tested and the centerline of the support frame 512 is a right angle. β = 90°. More specifically, the center of gravity of the load simulation frame 51 coincides with the axis of the pin of the load simulation frame 51. Combined with the aforementioned position of β = 90°, these two conditions ensure that the weight of the counterweight block 52 is applied to the electric push rod to be tested in a 1:1 ratio, eliminating the need for conversion.

[0066] According to another aspect of the present invention, a method for testing an electric push rod life test apparatus 100 is provided, and the method is performed according to the following steps:

[0067] Install the electric push rod to be tested, obtain relevant data of the electric push rod to be tested, and calculate the initial mid-section position of the electric push rod to be tested 60. The relevant data includes the stroke L1 of the electric push rod to be tested 60 and the minimum retracted length L2 of the electric push rod to be tested 60. The initial mid-section position L0 is calculated as L0 = L2 + L1 / 2.

[0068] like Figure 6 As shown, the reading corresponding to the notch 31 on the side of the tailstock support 30 is the initial mid-position. Press the mid-position reduction button 411 and the mid-position increase button 413 to adjust the reading to equal L0. Press and hold the mid-position reduction button 411 and the mid-position increase button 413 to continuously adjust the mid-position by 1mm. Each press of the mid-position reduction button 411 or the mid-position increase button 413 causes the telescopic adjustment push rod 22 to extend or retract 1mm. Each 1mm extension or retraction of the telescopic adjustment push rod 22 corresponds to a 1mm increase or decrease in the actual mid-position.

[0069] When the initial middle section position is adjusted to the right position, the present invention achieves a fixed condition: Figure 2 As shown in FIG, when the electric push rod to be tested reaches the middle of its stroke, the angle β between its axis and the load simulation frame 51 is 90°. This position is the benchmark for the entire life test.

[0070] Adjust the electric push rod 60 to be tested to the initial middle position, and after all the installation connections are reliable, press the control component 40, the life test begins, the control component 40 drives the electric push rod to be tested to extend into position and stop at the current limit A1, after an interval of 2s, the control component drives the electric push rod to be tested to retract into position and stop at the current limit A2, this is one cycle, and enter the next cycle after an interval of 2s, until it stops working after running 30,000 times, and the test is completed.

[0071] In the embodiments of the present invention, the term "plurality" refers to two or more, unless otherwise specified. Terms such as "installed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art will understand the specific meanings of these terms in the embodiments of the present invention based on specific circumstances.

[0072] In the description of the embodiments of the present invention, it should be understood that the terms "upper" and "lower" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the embodiments of the present invention.

[0073] Throughout this specification, terms such as "one embodiment" and "a preferred embodiment" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0074] The above is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations are possible in the present invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A device for testing the life of an electric push rod, characterized in that: include: A test stand base (10), arranged on the test platform, serving as a mounting base for other parts of the device (100) except the test stand base (10); A mid-section position adjustment component (20) is installed at the rear end of the test stand base (10) and is used to adjust the electric push rod (60) to be tested to the mid-section position; A tailstock support (30) is mounted on the middle position adjustment assembly (20) and is used to fix the end of the electric push rod (60) to be tested and moves with the middle position adjustment assembly (20); A control assembly (40) is mounted on the test stand base (10) and is used to control the movement of the middle position adjustment assembly (20) and the electric push rod (60) to be tested; as well as A load assembly (50) is mounted at the front end of the test stand base (10) and is used to fix the front end of the electric push rod (60) to be tested and provide a load counterweight; The load assembly (50) comprises: A load simulation frame (51) comprising a counterweight frame (511) and a support frame (512), wherein the counterweight frame (511) is arranged in a horizontal direction, has a slot at one end for mounting a counterweight block (52), and is connected to the support frame (512) at the other end, and an angle between the support frame (512) and the counterweight frame (511) is an obtuse angle; and A counterweight block (52) is inserted into a slot of the counterweight frame (511); The front and rear ends of the test stand base (10) are respectively provided with a first protrusion (11) and a second protrusion (12), wherein the first protrusion (11) is used to install the load assembly (50), and the second protrusion (12) is high at the front and low at the rear, and is used to install the middle position adjustment assembly (20), so that the middle position adjustment assembly (20) can slide along the second protrusion (12).

2. The device for testing the life of an electric push rod according to claim 1, characterized in that: The mid-section position adjustment component (20) comprises: A slider (21) is mounted on the test stand base (10) and is slidable relative to the test stand base (10); and The telescopic adjustment push rod (22) has a distal end mounted on the rear end of the test stand base (10) via a quick-release structure (70), and a distal end mounted on the slider (21) via a quick-release structure (70), and drives the slider (21) to slide.

3. The device for testing the life of an electric push rod according to claim 2, characterized in that: The mid-section position adjustment component (20) further includes: A scale (23) mounted on the test stand base (10) for quickly finding the middle position; and A notch (31) is formed at the tailstock support (30) for aligning the scale in the scale (23).

4. The device for testing the life of an electric push rod according to claim 1, characterized in that: The end of the electric push rod (60) to be tested is mounted on the tailstock support (30) via a quick-release structure (70).

5. The device for testing the life of an electric push rod according to claim 1, characterized in that: The control component (40) includes: A control button (41) for generating external control instructions; and The controller (42) is connected to the control button (41), the middle position adjustment component and the electric push rod (60) to be tested, and is used to receive the external control instructions of the control button (41) and convert them into internal control instructions to control the operation of the middle position adjustment component and the electric push rod (60) to be tested.

6. The device for testing the life of an electric push rod according to claim 1, characterized in that: When the electric push rod (60) to be tested is located at a mid-section position, the included angle between the push rod centerline of the electric push rod (60) to be tested and the centerline of the support frame (512) is a right angle.

7. A method for testing the life of an electric push rod according to any one of claims 1 to 6, characterized in that: Follow the steps below: Install the electric push rod to be tested in place, obtain relevant data of the electric push rod to be tested, and calculate the initial middle position of the electric push rod to be tested (60); After adjusting the electric push rod (60) to be tested to the initial middle position and all the installation connections are reliable, click the control component (40), the life test test starts, the control component (40) drives the electric push rod to be tested to extend to the position and reaches the current limit A1 to stop, after an interval of 2s, the control component (40) drives the electric push rod to be tested to retract to the position and reaches the current limit A2 to stop, this is one cycle, after an interval of 2s, enter the next cycle, until it stops working after running 30,000 times, and the test is completed.

8. The testing method according to claim 7, characterized in that: The relevant data include the stroke L1 of the electric push rod to be tested and the minimum retracted length L2 of the electric push rod to be tested, and the initial middle position L0 is calculated, L0=L2+L1 / 2.

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