Method and equipment for testing performance of flat jacking support special for motor home

Abstract

The invention relates to the technical field of flat roofs special for limousines, in particular to a performance test method and test equipment for a flat jacking support special for a limousine. The method comprises the following steps: 1, resetting equipment, controlling an electric push rod through a touch screen of a control unit, operating the electric push rod to rise, and driving a connecting plate to lift upwards; secondly, a support for jacking the flat jacking special for the motor home is placed on the mounting plate; thirdly, the electric push rod is operated to descend; fourthly, a connector of a force value sensor is connected to a computer, an electric push rod is operated to descend, at the moment, a connecting plate starts to make contact with a support, and self-locking force of a driving push rod and an air spring in the support forms upward resultant force through the action of a support force arm; and after the downward action of the upper electric push rod exceeds the resultant force, the bracket is pushed to descend downwards. The invention provides the performance test method and test equipment for the flat jacking bracket special for the motor home, which have the advantages of more accurate test result, good stability, high detection efficiency and the like.

Description

Technical Field

[0001] This invention relates to the field of RV-specific flat roof technology, and in particular to a performance testing method and testing equipment for an RV-specific flat roof lift bracket. Background Technology

[0002] With the development of society, people's requirements for RVs are getting higher and higher. The flat roof of the RV has changed from a fixed height to an adjustable one, which can be raised or lowered at any time without affecting the normal use of the RV. Among them, the bracket used for raising and lowering the flat roof needs to be tested for performance when it is installed on the roof to ensure that its structural strength is sufficient and to avoid safety accidents.

[0003] Chinese patent CN208653795U discloses an electric linear actuator testing device, including a frame, a cylinder, and an MCU controller. The cylinder is fixed to the upper end of the frame, and a support plate for supporting the electric linear actuator is provided at the lower end of the frame. An upper connecting component is provided on the extended end of the cylinder, and a lower connecting component is provided on the support plate. A force sensor for detecting the thrust and pull provided by the extended end of the cylinder is provided between the extended end of the cylinder and the upper connecting component. A proportional valve for changing the air intake of the cylinder is provided in the air circuit of the cylinder. The MCU controller is connected to the force sensor and the proportional valve respectively. This utility model uses a cylinder instead of traditional weights for counterweighting, which reduces the size and provides real-time data monitoring and control, resulting in higher testing accuracy. It also eliminates the need for manual weight counterweighting, effectively improving the testing efficiency of electric linear actuators. At the same time, it has high versatility and can test electric linear actuators of different sizes and specifications.

[0004] However, when measuring the support with this technical solution, the single push rod may cause uneven force on the support, which will lead to inaccurate test results. In addition, it does not have an anti-tipping design, which makes it easy to shake and cause eccentricity, resulting in large test errors. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a performance testing method for a flat-top pop-up bracket specifically designed for RVs. This method uses two electric push rods to press down synchronously to test the bracket's performance, ensuring uniform force distribution and consistent downward pressure at all points. Furthermore, the self-locking force of the internal drive push rods and gas springs transmits the force to a force sensor via the bracket's lever arm, which in turn transmits the force to a computer. This allows for a more intuitive observation of changes in the forces acting on the bracket, thus ensuring the accuracy of the test results.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A performance testing method for a RV-specific flat-top pop-up bracket includes the following steps: Step 1: Reset the equipment. Control the electric push rod via the touch screen of the control unit. Operate the electric push rod to rise, which will lift the connecting plate upwards to leave enough space. Part Two: Place the RV-specific flat-top pop-up bracket onto the mounting plate and secure it; Step 3: Operate the electric push rod to lower the connecting plate to a position 5mm away from the upper plane of the bracket. Step 4: Connect the force sensor connector to the computer and operate the electric push rod to descend. At this time, the connecting plate begins to contact the bracket. Because the bracket being tested is a combination of manual and automatic operation, the self-locking force of the internal drive push rod and the gas spring forms an upward resultant force through the bracket lever arm. After the upper electric push rod acts downward beyond this resultant force, it pushes the bracket to descend.

[0007] Preferably, in the fourth step, it is necessary to ensure that the force on the bracket is uniform on the contact area with the connecting plate, and to ensure that the downward pressure at each point is consistent. At this time, it is necessary to control the downward distance deviation of the two electric push rods to be within 0.3mm.

[0008] Preferably, the downlink distance deviation is achieved through the synchronization Hall function of the synchronization controller. Once the Hall value sampling of the two electric push rods exceeds 400 pulse deviations, the controller will report an error, E02 Hall is not synchronized, which indicates that the self-locking capability output of the bracket is uneven. At this time, the force detection of the bracket is unqualified, and the internal force design of the bracket needs to be adjusted.

[0009] A performance testing device for a RV-specific flat-top pop-up bracket, used to implement the above-described performance testing method for a RV-specific flat-top pop-up bracket, is characterized by comprising: a frame, wherein the frame is provided from top to bottom with: a first limiting plate, a second limiting plate, a connecting plate, a mounting plate, and a receiving plate; two electric push rods are vertically and fixedly connected to the first limiting plate and the second limiting plate, and the ends of the electric push rods are fixedly connected to the connecting plate; and the bracket is disposed between the connecting plate and the mounting plate.

[0010] Preferably, two guide posts are provided between the second limiting plate and the receiving plate, and the connecting plate is slidably connected to the guide posts.

[0011] Preferably, both sides of the connecting plate and the mounting plate that are in contact with the bracket are provided with protective plates, and the bracket is installed between the two protective plates.

[0012] Preferably, the force sensor is provided on the receiving plate, and the top of the force sensor abuts against the lower end face of the mounting plate.

[0013] Preferably, the mounting plate is fixedly connected to the guide post.

[0014] Preferably, the connecting plate is fixedly connected to the top of the bracket and the mounting plate is fixedly connected to the bottom of the bracket by fasteners.

[0015] Preferably, the first limiting plate, the second limiting plate, the connecting plate, the mounting plate, and the receiving plate are all spaced apart.

[0016] The beneficial effects of this invention are as follows: (1) The present invention makes the two electric push rods stable and firm enough by passing through the two limiting plates in sequence and fixing them so that they will not deviate during operation, thereby ensuring the accuracy of the test results. The connecting plate at the output end of the electric push rod is slidably connected to the two guide columns, which can ensure that the movement trajectory of the connecting plate is absolutely vertical and stable during the test, prevent lateral force interference, and further ensure the accuracy of the test data.

[0017] (2) By setting guard plates on both sides of the connecting plate and the mounting plate that are connected to the bracket, and installing the bracket between the two guard plates, the present invention can prevent the bracket from being slightly twisted or slipping laterally under stress, thus ensuring the safety and continuity of the test results.

[0018] (3) The present invention improves the speed of force transmission by having the top of the force sensor just abut against the lower end of the mounting plate, and the direct contact can quickly and clearly transmit the test load (such as pressure) to the force sensor, thereby further ensuring the accuracy of the test results.

[0019] In summary, the present invention has the advantages of more accurate test results, better stability, and higher detection efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a force value curve of the self-locking force of the bracket of the present invention; Figure 3 This is a continuation of the force value curve of the self-locking force of the bracket of the present invention; Figure 4 This is a force curve of the self-locking force of the drive push rod in this invention; Figure 5 This is a force curve of the self-locking force of the gas spring of the present invention; Figure 6 This is the front view of the present invention; Figure 7 This is a side view of the present invention. Detailed Implementation

[0021] 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.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] Example 1 like Figure 1 As shown in the figure, this embodiment provides a performance testing method for a RV-specific flat-top pop-up bracket, including the following steps: Step 1: Reset the equipment. Control the electric push rod 2 through the touch screen of the control unit. Operate the electric push rod 2 to rise, which will drive the connecting plate 13 to lift upward, leaving enough space. Part Two: Place the RV-specific flat-top pop-up bracket 3 on the mounting plate 14 and fix it in place, specifically by connecting the series screws. Step 3: Operate the electric push rod 2 to descend, which will bring the connecting plate 13 down to a distance of 5mm from the upper plane of the bracket 3. Step 4: Connect the connector of the force sensor 18 to the computer and operate the electric push rod 2 to descend. At this time, the connecting plate 13 begins to contact the bracket 3. Because the bracket 3 being tested is a combination of manual and automatic operation, the self-locking force of the internal drive push rod 31 and the gas spring 32 forms an upward resultant force through the action of the bracket 3 lever arm 33. After the upper electric push rod 2 acts downward beyond this resultant force, it pushes the bracket 3 to descend.

[0024] In the fourth step, it is necessary to ensure that the force on the contact area between the bracket 3 and the connecting plate 13 is uniform, and that the downward pressure at each point is consistent. At this time, it is necessary to control the downward distance deviation of the two electric push rods 2 to be within 0.3mm.

[0025] The downward distance deviation is achieved through the synchronization Hall function of the synchronization controller. Once the Hall value sampling of the two electric push rods 2 exceeds 400 pulse deviations, the controller will report an error, E02 Hall is not synchronized, which indicates that the self-locking capability output of the bracket 3 is uneven. At this time, the force detection of the bracket 3 is unqualified, and the internal force design of the bracket 3 needs to be adjusted.

[0026] Meanwhile, based on the internal gearbox and lead of the drive push rod 31, the mechanical deviation caused by this deviation is calculated to be 0.3mm.

[0027] In this embodiment, except for the initial stage where the support 3 overcomes its self-locking force (initially overcoming the starting compression force of the gas spring 32 inside the support 3 and the initial friction of the lead screw nut inside the drive push rod 31), the force changes during the remaining descent process are linear, and are collected in real time by the force sensor 18 and transmitted to the computer to form a complete force-displacement curve, such as... Figure 2 and Figure 3 As shown, bracket 3, model P04LM-1, has a critical self-locking force of 1340N, a self-locking force of 1000N when the first half is relatively stable, and a minimum self-locking force of 670N; Figure 4 As shown, the drive push rod 31, model number 38 push rod-139 / 10*10-1, has a critical self-locking force of 1940N and a self-locking force of 800N after stabilization.

[0028] Of course, such as Figure 5 As shown, by analyzing the slope of the curve and the force values ​​at key nodes (such as the force value that changes the motion state of the support 3 during initial startup, and the force value at the point of sudden drop caused by the change in the internal angle of the support 3 before it closes), the self-locking performance of the support 3 can be accurately determined. The gas spring 32, model (Fangyuan) No. 1, has a capacity of 4300N and has been running for 20,000 times. Its initial value is 4300N and its maximum value is 5800N.

[0029] In addition, the stability of motion (the difference in force between the two force points of the support 3 and the electric push rod 2 during the motion can be obtained by the current corresponding to the two electric push rods 2) and the structural strength (the structural strength is the overall strength of the support 3 that meets the basic requirement of not producing plastic deformation when the electric push rod 2 is overloaded or when a force much larger than the rated lifting weight of the support 3 is applied) meet the design requirements; the whole test process is controllable and repeatable, which effectively improves the accuracy and efficiency of the test.

[0030] Example 2 like Figure 6 and Figure 7 As shown, components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 2 and Embodiment 1 is as follows: This embodiment provides a performance testing device for a RV-specific flat-top pop-up bracket 3, used to implement a performance testing method for a RV-specific flat-top pop-up bracket 3 as described in Embodiment 1. The device includes a frame 1, which, from top to bottom, is provided with: a first limiting plate 11, a second limiting plate 12, a connecting plate 13, a mounting plate 14, and a receiving plate 15. Two electric push rods 2 are vertically and fixedly connected to the first limiting plate 11 and the second limiting plate 12, and the ends of the electric push rods 2 are fixedly connected to the connecting plate 13. The bracket 3 is disposed between the connecting plate 13 and the mounting plate 14. Both the first limiting plate 11 and the second limiting plate 12 can be fixedly connected to the frame 1 by bolts. Their function is to fix and support the electric push rods 2, preventing positional deviation during operation, improving stability, and thus ensuring test results.

[0031] Two guide posts 16 are provided between the second limiting plate 12 and the receiving plate 15. The connecting plate 13 is slidably connected to the guide posts 16, which can ensure that the movement trajectory of the connecting plate 13 is absolutely vertical and stable during the test, prevent lateral force interference, and ensure the accuracy of the test data. The two ends of the guide posts 16 can also be fixed to the second limiting plate 12 and the receiving plate 15 by bolts.

[0032] Meanwhile, the electric push rod 2 can be driven by a Hall motor and a T-type lead screw and nut to precisely control the extension and retraction position, provide the main downward pressing power, and a force sensor is installed at the front end to monitor the applied force value in real time. The electric push rod 2 can communicate through the touch screen via the I / O interface to realize the detection of the force value of a single push rod and the instantaneous current, and it contains a limit switch.

[0033] In this embodiment, the electric push rod 2 is connected to a controller. The controller has a push rod pulse detection function. It detects the number of motor rotations based on the Hall element at the tail of the electric push rod 2, thereby detecting the relative position signal of the push rod extension. At the same time, the control unit detects the current of the two electric push rods 2. It operates normally as long as it does not exceed the predetermined value (push rod protection current). If the current exceeds the value, it reports an error and stops, thereby protecting the safe operation of the entire system.

[0034] In this embodiment, the connecting plate 13 and the mounting plate 14 are respectively provided with guard plates 17 on both sides of the end face that are in contact with the bracket 3. The bracket 3 is installed between the two guard plates 17. The guard plates 17 play a limiting role, which can prevent the bracket 3 from being slightly twisted or slipped laterally under force, and ensure the safety and continuity of the test results. The guard plates 17 can be fixed to the connecting plate 13 and the mounting plate 14 with multiple bolts.

[0035] In this embodiment, the force sensor 18 is provided on the receiving plate 15, and the top of the force sensor 18 just abuts against the lower end face of the mounting plate 14. Direct contact can quickly and clearly transmit the test load (such as pressure) to the force sensor 18, thereby further ensuring the accuracy of the test results. The receiving plate 15 can be fixedly connected to the frame 1 by several bolts.

[0036] In this embodiment, the mounting plate 14 is fixedly connected to the guide post 16, providing a rigid and stable mounting reference for the bottom of the bracket 3, which can prevent the bracket 3 from shifting during the test.

[0037] In this embodiment, a dual-column guide is adopted, and a specially designed bracket 3 mounting panel is used to fit the upper and lower guide rail mounting surfaces of the bracket 3 for the RV-specific flat-top pop-up bracket. At the same time, front and rear guard plates 17 are used to prevent the bracket 3 from tilting during compression and avoid the danger of overturning. The double-layer bottom plate design isolates the lower plane of the bracket 3 from the force sensor 18, and guides the force through the lower plate, so that the force value is transmitted more accurately.

[0038] Of course, the connecting plate 13 and the top of the bracket 3, as well as the mounting plate 14 and the bottom of the bracket 3, are fixedly connected by fasteners 19. The fasteners 19 are preferably bolts to ensure rigid connection and effective force transmission.

[0039] In addition, the first limiting plate 11, the second limiting plate 12, the connecting plate 13, the mounting plate 14, and the receiving plate 15 are all spaced apart to ensure that there is enough space between each layer and to avoid movement interference.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A performance testing method for a flat-top pop-up bracket specifically for RVs, characterized in that, Includes the following steps: Step 1: Reset the equipment. Control the electric push rod via the touch screen of the control unit. Operate the electric push rod to rise, which will lift the connecting plate upwards to leave enough space. Part Two: Place the RV-specific flat-top pop-up bracket onto the mounting plate and secure it; Step 3: Operate the electric push rod to lower the connecting plate to a position 5mm away from the upper plane of the bracket. Step 4: Connect the force sensor connector to the computer and operate the electric push rod to descend. At this time, the connecting plate begins to contact the bracket. Because the bracket being tested is a combination of manual and automatic operation, the self-locking force of the internal drive push rod and the gas spring forms an upward resultant force through the bracket lever arm. After the upper electric push rod acts downward beyond this resultant force, it pushes the bracket to descend.

2. The performance testing method for a RV-specific flat-top pop-up bracket according to claim 1, characterized in that, In the fourth step, it is necessary to ensure that the force on the bracket is uniform on the contact area with the connecting plate, and to ensure that the downward pressure at each point is consistent. At this time, it is necessary to control the downward distance deviation of the two electric push rods to be within 0.3mm.

3. The performance testing method for a RV-specific flat-top pop-up bracket according to claim 2, characterized in that, Downward distance deviation is achieved through the synchronization Hall function of the synchronous controller. Once the Hall value sampling of the two electric push rods exceeds 400 pulse deviations, the controller will report an error, E02 Hall is not synchronized, which indicates that the self-locking capability output of the bracket is uneven. At this time, the force detection of the bracket is unqualified, and the internal force design of the bracket needs to be adjusted.

4. A performance testing device for a RV-specific flat-top pop-up bracket, used to implement the performance testing method for a RV-specific flat-top pop-up bracket as described in any one of claims 1-3, characterized in that, The system includes a frame, which is provided from top to bottom with a first limiting plate, a second limiting plate, a connecting plate, a mounting plate, and a receiving plate. Two electric push rods are vertically and fixedly connected to the first and second limiting plates, and the ends of the electric push rods are fixedly connected to the connecting plate. The bracket is disposed between the connecting plate and the mounting plate.

5. The performance testing equipment for a RV-specific flat-top pop-up bracket according to claim 4, characterized in that, Two guide posts are provided between the second limiting plate and the receiving plate, and the connecting plate is slidably connected to the guide posts.

6. The performance testing equipment for a RV-specific flat-top pop-up bracket according to claim 4, characterized in that, The connecting plate and the mounting plate are each provided with a protective plate on both sides of the end face that is in contact with the bracket, and the bracket is installed between the two protective plates.

7. The performance testing equipment for a RV-specific flat-top pop-up bracket according to claim 4, characterized in that, The force sensor is provided on the receiving plate, and the top of the force sensor just abuts against the lower end face of the mounting plate.

8. The performance testing equipment for a RV-specific flat-top pop-up bracket according to claim 5, characterized in that, The mounting plate is fixedly connected to the guide post.

9. The performance testing equipment for a RV-specific flat-top pop-up bracket according to claim 4, characterized in that, The connecting plate is fixedly connected to the top of the bracket and the mounting plate is fixedly connected to the bottom of the bracket by fasteners.

10. The performance testing equipment for a RV-specific flat-top lift-up bracket according to claim 4, characterized in that, The first limiting plate, the second limiting plate, the connecting plate, the mounting plate, and the receiving plate are all spaced apart.

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