Subway sliding plug door linear bearing service life testing machine

Abstract

The invention discloses a service life testing machine for a linear bearing of a subway sliding plug door. The service life testing machine comprises a rack; the sliding cylinder assembly is connected with the rack, and the sliding cylinder assembly is provided with a linear bearing; the rack assembly is connected with the rack, and the rack assembly is provided with a linear bearing; the axial loading assembly is connected with the sliding cylinder assembly; the radial loading assemblies abut against the sliding barrel assembly and the hanging frame assembly respectively; and the driving assemblies are connected with the sliding barrel assembly or the hanging frame assembly. According to the invention, through the axial loading assembly, the radial loading assembly and the driving assembly, the real use scene of the linear bearing of the subway sliding plug door is simulated, and the reliability of the test result of the service life testing machine is improved.

Description

Technical Field

[0001] The invention relates to the technical field of subways, and in particular to a subway plug door linear bearing life testing machine. Background Art

[0002] With the rapid development of urban rail transit, subway, as an efficient and environmentally friendly public transportation tool, has gradually become an important mode of travel in many cities. Various electromechanical equipment in the subway system needs to have good performance and high reliability during repeated use, especially the door control system of subway vehicles, whose normal operation directly affects the safety and riding experience of passengers. One of the core components of the door control system is the plug-in door linear bearing, which plays a key role in achieving the smooth opening and closing of the door body. In practical applications, the plug-in door linear bearing is often in a complex working environment and needs to withstand forces in multiple directions. Therefore, it is particularly important to perform fatigue life testing on subway plug-in door linear bearings, which can not only evaluate its long-term performance, but also provide reliable data support for design and improvement. Traditional bearing life test methods often use manual loading or simple mechanical loading methods. These methods are not only inefficient, but also difficult to accurately control the loading conditions, resulting in the inability to guarantee the accuracy and repeatability of the test results. In addition, due to the lack of effective real-time monitoring means, it is impossible to accurately capture the slight changes in the bearing during operation, which in turn affects the accurate evaluation of the bearing life. Therefore, it is very necessary to provide a subway plug-in door linear bearing life tester.

[0003] However, one of the shortcomings of the relevant existing technologies is that it is impossible to simulate the actual usage scenarios of subway plug door linear bearings, resulting in low reliability of the evaluation results. Summary of the invention

[0004] The present invention aims to solve at least one of the above technical problems.

[0005] In order to solve the above problems, the first purpose of the present invention is to provide a subway plug door linear bearing life testing machine, which includes: a frame; a slide assembly, the slide assembly is connected to the frame, and the slide assembly is provided with a linear bearing; a bracket assembly, the bracket assembly is connected to the frame, and the bracket assembly is provided with a linear bearing; an axial loading assembly, the axial loading assembly is connected to the slide assembly; at least two radial loading assemblies, the radial loading assemblies are respectively abutted against the slide assembly and the bracket assembly; at least two drive assemblies, the drive assembly is connected to the slide assembly or the bracket assembly.

[0006] By simulating the actual operating environment and load conditions of subway doors, the test results can more realistically reflect the performance of linear bearings in actual use, thereby improving the reliability and accuracy of the test. The axial loading component simulates the collision effect when closing the door, the radial loading component simulates the force caused by the door's own weight, and the drive component simulates the push-pull force when the door is opened and closed. Compared with field tests conducted in a real subway environment, the use of this test machine can be carried out in a laboratory environment, avoiding additional costs and risks that may be incurred due to restrictions on site conditions. By conducting rapid and multiple tests in a controllable test environment, the test cycle can be effectively shortened. The detailed data and analysis results that can be obtained during the test can help engineers optimize the design and production process of subway plug door linear bearings and further improve the performance and life of the product.

[0007] In the above technical solution, the driving assembly includes: a driving electric cylinder; a driving connection assembly, the driving connection assembly is connected to the driving electric cylinder, the driving connection assembly is connected to the slide assembly or the hanger assembly, and the driving connection assembly includes a tension and compression sensor.

[0008] The magnitude and speed of the loading force are precisely controlled by electronic control to ensure that the loading process is stable and repeatable. The drive cylinder and the slide assembly or the hanger assembly are connected through the drive connection assembly to ensure that the loading force can be accurately transmitted and applied. The tension and compression sensors are installed on the drive connection assembly to monitor and record the changes in the loading force in real time. This helps to accurately control the loading conditions during the test and ensure that the loading force remains within the set range. At the same time, the loading parameters can be adjusted in time to avoid overload or underload. The tension and compression sensors can record detailed data during the loading process, which can be used to analyze the performance changes of the linear bearing and evaluate its life and reliability. According to the real-time data provided by the tension and compression sensors during the test, the loading force can be dynamically adjusted to ensure that the loading conditions during the test are closer to the actual use.

[0009] In any of the above technical solutions, the driving connection component has a traction state and a pushing state. In the traction state, the tension and compression sensor is started; in the pushing state, the tension and compression sensor is turned off.

[0010] In the traction state, the drive connection component applies a pulling force in one direction, and the tension and compression sensor is started for monitoring. The tension and compression sensor only works when the tension needs to be monitored, reducing unnecessary energy consumption and wear. In the push state, the axial loading component simulates the collision effect of the door. To avoid damage to the tension and compression sensor, the tension and compression sensor will be turned off in the push state. The resistance of the linear bearing is detected by the tension and compression sensor. If the resistance exceeds the set threshold value, the test ends. This setting can accurately test the life of the linear bearing and improve the reliability of the test results.

[0011] In any of the above technical solutions, the drive connection assembly also includes: a connecting plate, which is connected to the slide assembly or the hanger assembly; a pressing sleeve, in which the tension and compression sensor is located, and the pressing sleeve is connected to the connecting plate.

[0012] The compression sleeve can protect the tension and compression sensor from external environmental influences such as dust, vibration and impact, and extend the service life of the sensor. The connecting plate is connected to the slide assembly or the hanger assembly, making the overall installation of the drive connection assembly more convenient. The connecting plate can be used as a platform for fixing and connecting, simplifying the installation steps. The tension and compression sensor is located in the compression sleeve and installed through the connecting plate, which makes the entire drive connection assembly have a high level of modularity and facilitates maintenance and replacement of sensors. The compression sleeve can effectively isolate the influence of external vibration on the tension and compression sensor, ensuring the accuracy and stability of the measurement results. The compression sleeve fixes the tension and compression sensor in a relatively stable position, reducing the measurement error caused by the movement of the sensor.

[0013] In any of the above technical solutions, the axial loading assembly includes: a base, which is connected to the frame; an axial pressure sensor, which is connected to the base; a first elastic member, an axial pressure guide column is provided between the first elastic member and the axial pressure sensor; and an impact sleeve, which is located at one end of the first elastic member close to the slide assembly.

[0014] The impact sleeve is located at one end of the first elastic member close to the slide assembly, which can further provide a buffering effect, reduce the impact of the slide assembly and the test object, and protect the integrity of the test object. The axial pressure guide column ensures that the axial force during the loading process can be accurately transmitted to the axial pressure sensor, reducing energy loss and irregular loading, and improving loading efficiency and accuracy. The axial pressure sensor can monitor and record the force value during the loading process in real time to ensure the accuracy and credibility of the data. At the same time, the buffering effect of the first elastic member and the impact sleeve can reduce fluctuations in the test and improve the reliability of the data.

[0015] In any of the above technical solutions, the axial loading assembly also includes an impact plate, and the impact plate is connected to the slide cylinder assembly.

[0016] The impact plate can be used as a buffer element to reduce the direct impact between the slide assembly and the impact sleeve. Through the buffering effect of the impact plate, it can ensure that the slide assembly is subjected to sufficient force without being easily damaged, thereby improving the reliability of the test results. In addition, the impact plate can be connected to multiple slide assemblies at the same time, and multiple sets of linear bearings can be tested at the same time, thereby improving the working efficiency of the test machine. The impact plate can reduce interference during the loading process and improve the accuracy and credibility of the measurement data of the axial pressure sensor, ensuring that the test results are more reliable.

[0017] In any of the above technical solutions, the radial loading assembly includes: a pressure regulating sleeve; a second elastic member, the second elastic member is connected to the pressure regulating sleeve; a radial pressure sensor, and a radial pressure guide column is provided between the radial pressure sensor and the second elastic member.

[0018] The radial pressure sensor is used to accurately measure the applied radial force. The radial pressure sensor can monitor and record the force value during the loading process in real time, ensuring the accuracy and traceability of the loading operation. The radial pressure guide column ensures that the radial force can be accurately transmitted to the radial pressure sensor. This reduces the error during the loading process and improves the accuracy of the loading. The modular design of the radial loading assembly makes the entire loading assembly easy to maintain and adjust. For example, if the radial pressure sensor needs to be replaced or the loading parameters need to be adjusted, it can be easily operated. The radial pressure sensor can monitor and record the force value during the loading process in real time, ensuring the accuracy and credibility of the data. At the same time, the buffering effect of the second elastic member can reduce fluctuations in the test and improve the reliability of the data.

[0019] In any of the above technical solutions, the testing machine also includes a measurement and control device, which is communicatively connected with the axial loading component, the radial loading component, and the driving component.

[0020] The measurement and control device can monitor and control the working status of the axial loading component, radial loading component and drive component in real time. Through precise control and adjustment, the accuracy and reliability of the loading operation are ensured. The measurement and control device can collect the force value data of the axial loading component and the radial loading component, as well as the working parameters of the drive component in real time to ensure the integrity and accuracy of the data. The measurement and control device can automatically adjust the loading parameters, such as loading speed, loading force, etc., according to the test requirements, simplify the operation steps and improve work efficiency. The measurement and control device can record all data during the test, including loading force, loading speed, time, etc., to facilitate subsequent data analysis and processing. The measurement and control device can analyze the collected data in real time and generate a test report to help users better understand the test results and provide a basis for subsequent improvements and optimizations. The measurement and control device is equipped with a user interface, through which users can intuitively monitor and control the various parameters of the test machine, improve the convenience and comfort of operation, and the measurement and control device supports remote operation and monitoring, which is convenient for users to operate and manage in different locations and improve flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be discussed below. Obviously, the technical solutions described in conjunction with the drawings are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments and their drawings can be obtained based on the embodiments shown in these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of a subway plug sliding door linear bearing life testing machine provided by the present invention.

[0023] Figure 2 It is another schematic diagram of a subway plug door linear bearing life testing machine provided by the present invention.

[0024] Figure 3 It is another schematic diagram of a subway plug door linear bearing life testing machine provided by the present invention.

[0025] Figure 4 It is another schematic diagram of a subway plug door linear bearing life testing machine provided by the present invention.

[0026] Figure 5 It is another schematic diagram of a subway plug door linear bearing life testing machine provided by the present invention.

[0027] In the figure: 100-frame, 200-slide assembly, 300-hanging bracket assembly, 400-axial loading assembly, 410-base, 420-axial pressure sensor, 430-first elastic member, 440-axial pressure guide column, 450-impact sleeve, 460-impact plate, 500-radial loading assembly, 510-pressure regulating sleeve, 520-second elastic member, 530-radial pressure sensor, 540-radial pressure guide column, 600-driving assembly, 610-driving electric cylinder, 620-driving connecting assembly, 621-tension and compression sensor, 622-connecting plate, 623-pressing sleeve. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purpose, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0029] like Figure 1 , Figure 2As shown, an embodiment of the present invention provides a subway plug door linear bearing life testing machine, which includes: a frame 100; a slide assembly 200, the slide assembly 200 is connected to the frame 100, and the slide assembly 200 is provided with a linear bearing; a bracket assembly 300, the bracket assembly 300 is connected to the frame 100, and the bracket assembly 300 is provided with a linear bearing; an axial loading assembly 400, the axial loading assembly 400 is connected to the slide assembly 200; at least two radial loading assemblies 500, the radial loading assembly 500 is respectively abutted against the slide assembly 200 and the bracket assembly 300; at least two drive assemblies 600, the drive assembly 600 is connected to the slide assembly 200 or the bracket assembly 300; a measurement and control device, the measurement and control device is communicatively connected with the axial loading assembly 400, the radial loading assembly 500, and the drive assembly 600.

[0030] In this embodiment, the test machine is divided into a long guide column linear bearing test group and a short guide column linear bearing test group. The long guide column linear bearing test group is used to test the linear bearings in the slide assembly 200, and the short guide column linear bearing test group is used to test the linear bearings in the bracket assembly 300. There are two linear bearings in each slide assembly 200 and one linear bearing in each bracket assembly 300. The long guide column linear bearing test group can test two slide assemblies 200 at the same time, and the short guide column linear bearing test group can test two bracket assemblies 300 at the same time. The slide assembly 200 in the subway plug door needs to withstand the gravity of the door, the thrust and pull during opening and closing, and the impact when closing the door. The axial loading assembly 400 simulates the door closing impact, the radial loading assembly 500 simulates the door gravity, and the driving assembly 600 simulates the door push and pull, so as to achieve the effect of truly simulating the use scenario of the slide assembly 200, so that the test results of the linear bearings on the slide assembly 200 are more reliable. The hanger assembly 300 in the subway plug door needs to bear the overall gravity of the door, the thrust and pull when opening and closing the door. The gravity of the door is simulated by the radial loading assembly 500, and the push and pull when opening and closing the door is simulated by the driving assembly 600, so as to achieve the effect of truly simulating the use scenario of the hanger assembly 300, so that the test results of the linear bearing on the hanger assembly 300 are more reliable. In addition, the measurement and control device is provided with a display and a control console. Through the measurement and control device, the number of tests, the force size when the driving assembly 600 pushes and pulls, the collision force size simulated by the axial loading assembly 400, and the gravity size of the door simulated by the radial loading assembly 500 can be set. Since the hanger assembly 300 and the slide assembly 200 need to bear different forces, the measurement and control device can adjust the force simulated by each component according to the actual force situation. And by setting the corresponding threshold value, when the driving assembly 600 tests that the resistance to the linear bearing reaches the threshold value, it is considered that the linear bearing has reached the life limit, the test is stopped, and the corresponding data is integrated.

[0031] like Figure 5As shown, in any of the above embodiments, the driving component 600 includes: a driving electric cylinder 610; a driving connection component 620, the driving connection component 620 is connected to the driving electric cylinder 610, the driving connection component 620 is connected to the slide assembly 200 or the hanger assembly 300, and the driving connection component 620 includes a tension and compression sensor 621; the driving connection component 620 has a traction state and a pushing state, in the traction state, the tension and compression sensor 621 is started, and in the pushing state, the tension and compression sensor 621 is turned off; a connecting plate 622, the connecting plate 622 is connected to the slide assembly 200 or the hanger assembly 300; a pressing sleeve 623, the tension and compression sensor 621 is located in the pressing sleeve 623, and the pressing sleeve 623 is connected to the connecting plate 622.

[0032] In this embodiment, the driving assembly 600 is divided into a driving electric cylinder 610 and a driving connection assembly 620. The driving electric cylinder 610 is mainly used to generate a stable thrust or pull, and the driving connection assembly 620 is used to connect with the slide assembly 200 or the hanger assembly 300. The connecting plate 622 in the driving connection assembly 620 is directly connected to the slide assembly 200 or the hanger assembly 300, the pressing sleeve 623 is connected to the driving electric cylinder 610, and the tension and compression sensor 621 is arranged on the inner side of the pressing sleeve 623 to play a certain protective role. The tension and compression sensor 621 has a small range and high precision, and can quickly and accurately measure the resistance of the slide assembly 200 or the hanger assembly 300, that is, the linear bearing sliding. Therefore, when the driving component 600 is in a pushing state to simulate the closing of a subway door, because the simulated door closing of the slide assembly 200 will simulate the door closing impact, the tension and compression sensor 621 will be turned off to avoid damage to the tension and compression sensor 621 due to the impact. When the driving component 600 is in a traction state to simulate the opening of a subway door, the tension and compression sensor 621 will be turned on to measure its resistance. If the resistance of the linear bearing reaches the threshold value, the test will be stopped and the corresponding data will be integrated.

[0033] like Figure 3 As shown, in any of the above embodiments, the axial loading assembly 400 includes: a base 410, which is connected to the frame 100; an axial pressure sensor 420, which is connected to the base 410; a first elastic member 430, and an axial pressure guide column 440 is provided between the first elastic member 430 and the axial pressure sensor 420; an impact sleeve 450, which is located at one end of the first elastic member 430 close to the slide assembly 200; and an impact plate 460, which is connected to the slide assembly 200.

[0034] In this embodiment, the impact plate 460 is connected to the slide assembly 200, and the slide assembly 200 is pushed all the way to the impact sleeve 450, so that the impact sleeve 450 collides with the impact plate 460, and transmits the corresponding force to the slide assembly 200, so as to simulate the collision when closing the door. An axial pressure guide column 440 is provided between the first elastic member 430 and the axial pressure sensor 420, which can better transmit the force generated during the collision to the axial pressure sensor 420, obtain corresponding data, and improve the authenticity of the simulation.

[0035] like Figure 4 As shown, in any of the above embodiments, the radial loading assembly 500 includes: a pressure regulating sleeve 510; a second elastic member 520, the second elastic member 520 is connected to the pressure regulating sleeve 510; a radial pressure sensor 530, and a radial pressure guide column 540 is provided between the radial pressure sensor 530 and the second elastic member 520.

[0036] In this embodiment, the radial pressure sensor 530 is provided with a pressure regulating sleeve 510, and the compression degree of the second elastic member 520 can be adjusted by adjusting the position of the pressure regulating sleeve 510, thereby simulating the gravity effect generated by doors of different weights. A radial pressure guide column 540 is provided between the radial pressure sensor 530 and the second elastic member 520, which can better obtain the elastic force generated by the second elastic member 520, and further better adjust the compression degree of the second elastic member 520 to truly simulate the gravity generated by the door.

[0037] In the present invention, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "connect" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "upper" and "lower" etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing 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 orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0039] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0040] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A subway plug door linear bearing life testing machine, characterized in that: include: Rack(100); A slide assembly (200), the slide assembly (200) being connected to the frame (100), and a linear bearing being provided inside the slide assembly (200); A hanger assembly (300), the hanger assembly (300) being connected to the frame (100), and a linear bearing being provided inside the hanger assembly (300); An axial loading assembly (400), the axial loading assembly (400) being connected to the slide assembly (200); At least two radial loading assemblies (500), the radial loading assemblies (500) respectively abutting against the slide assembly (200) and the hanger assembly (300); At least two drive assemblies (600), wherein the drive assemblies (600) are connected to the slide assembly (200) or the hanger assembly (300).

2. The subway plug door linear bearing life testing machine according to claim 1 is characterized in that: The driving assembly (600) comprises: Driving electric cylinder (610); A drive connection assembly (620), wherein the drive connection assembly (620) is connected to the drive electric cylinder (610), the drive connection assembly (620) is connected to the slide assembly (200) or the hanger assembly (300), and the drive connection assembly (620) includes a tension and compression sensor (621).

3. The subway plug door linear bearing life testing machine according to claim 2 is characterized in that: The drive connection assembly (620) has a pulling state and a pushing state. In the traction state, the tension and compression sensor (621) is activated; In the pushing state, the tension and compression sensor (621) is turned off.

4. The subway plug door linear bearing life testing machine according to claim 2 is characterized in that: The drive connection assembly (620) further includes: A connecting plate (622), the connecting plate (622) being connected to the slide assembly (200) or the hanger assembly (300); A pressing sleeve (623), wherein the tension and compression sensor (621) is located inside the pressing sleeve (623), and the pressing sleeve (623) is connected to the connecting plate (622).

5. The subway plug door linear bearing life testing machine according to claim 1 is characterized in that: The axial loading assembly (400) comprises: A base (410), the base (410) being connected to the frame (100); An axial pressure sensor (420), the axial pressure sensor (420) being connected to the base (410); A first elastic member (430), wherein an axial pressure guide column (440) is provided between the first elastic member (430) and the axial pressure sensor (420); An impact sleeve (450), the impact sleeve (450) being located at an end of the first elastic member (430) close to the slide cylinder assembly (200).

6. The subway plug door linear bearing life testing machine according to claim 5 is characterized in that: The axial loading assembly (400) further comprises an impact plate (460), wherein the impact plate (460) is connected to the slide cylinder assembly (200).

7. The subway plug door linear bearing life testing machine according to claim 1 is characterized in that: The radial loading assembly (500) comprises: Pressure regulating sleeve (510); a second elastic member (520), the second elastic member (520) being connected to the pressure regulating sleeve (510); A radial pressure sensor (530), wherein a radial pressure guide column (540) is provided between the radial pressure sensor (530) and the second elastic member (520).

8. The subway plug door linear bearing life testing machine according to claim 1 is characterized in that: It also includes a measurement and control device, which is communicatively connected to the axial loading assembly (400), the radial loading assembly (500), and the driving assembly (600).

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