Shaft distance adjusting and longitudinal servo centering device for bogie static load test bed

Abstract

The utility model relates to an axle distance adjustment and longitudinal servo centering device for a bogie static load test bed. The axle distance adjustment and longitudinal servo centering device for the bogie static load test bed comprises at least four weighing modules, each weighing module comprises a linear guide assembly, a weighing assembly, a displacement sensor, a rack and a driving mechanism, the weighing assemblies and the linear guide assemblies are assembled in a matched mode, the weighing assemblies are configured to slide along the linear guide assemblies, and the linear guide assemblies are configured to slide along the displacement sensors. The displacement sensor is configured to detect the displacement value of the weighing assembly, the length direction of the rack is parallel to the length direction of the linear guide assembly, the driving mechanism comprises a servo motor and a driving gear, the driving gear drives the driving gear to rotate, the servo motor and the weighing assembly are fixedly assembled, and the driving gear is meshed with the rack. According to the weighing module, the weighing assembly has the advantages of being high in moving speed, high in moving precision, accurate in displacement value and the like, so that the bogie static load test bed wheelbase adjustment and longitudinal servo centering device has the advantages of being high in working efficiency and high in precision.

Description

Technical Field

[0001] The present application relates to the field of rail transportation technology, and in particular to a wheelbase adjustment and longitudinal servo centering device for a bogie static load test bench. Background Art

[0002] Railway vehicle bogie static load test benches are widely used in the manufacturing, inspection, and maintenance of rail transit vehicles. They are a key piece of equipment for ensuring bogie performance and quality. Static load testing can promptly identify and resolve bogie problems, improving the safety and reliability of rail vehicles.

[0003] In the related art, the weighing assembly in the static load test bench is driven to move by manual or hydraulic cylinder drive. For the manual drive form, there are problems of low efficiency, low precision and high labor cost. For the hydraulic cylinder drive form, there are problems of low efficiency, low precision, large size of the hydraulic cylinder, complex structure, and high equipment cost. Utility Model Content

[0004] Based on this, it is necessary to provide a bogie static load test bench wheelbase adjustment and longitudinal servo centering device to address the problems of low efficiency and low precision of the bogie static load test bench wheelbase adjustment and longitudinal servo centering device.

[0005] The wheelbase adjustment and longitudinal servo centering device of the bogie static load test bench includes:

[0006] At least four weighing modules, each weighing module including a linear guide assembly, a weighing assembly, a displacement sensor, a rack, and a drive mechanism;

[0007] The weighing assembly is assembled in cooperation with the linear guide assembly, and the weighing assembly is configured to slide along the linear guide assembly;

[0008] The displacement sensor is configured to detect a displacement value of the weighing component;

[0009] The length direction of the rack is parallel to the length direction of the linear guide assembly;

[0010] The driving mechanism includes a servo motor and a driving gear. The driving gear drives the driving gear to rotate. The servo motor is fixedly assembled with the weighing component, and the driving gear is engaged with the rack.

[0011] In one embodiment, the weighing assembly includes a weighing body and a sliding fitting, the sliding fitting being fixed to the weighing body and configured to be slidably fitted with the linear guide assembly.

[0012] In one embodiment, the linear guide assembly is two parallel linear guide rails;

[0013] The sliding fitting comprises four sliders, wherein every two sliders are configured to be slidingly fitted with one linear guide rail;

[0014] The weighing body includes a wheel bearing platform in the shape of a regular quadrilateral and four support columns. In the thickness direction of the wheel bearing platform, one end of the four support columns is connected to the bottom of the wheel bearing platform, and the other ends of the four support columns are respectively connected to the four sliders.

[0015] In one embodiment, the rack and the displacement sensor are both arranged between two linear guide rails.

[0016] In one embodiment, the driving mechanism further includes a reducer, which is transmission-connected between the servo motor and the driving gear.

[0017] In one embodiment, the displacement sensor is a magnetostrictive displacement sensor.

[0018] In one embodiment, the number of the racks is two, and the drive gear is meshed between the two racks that are spaced apart.

[0019] In one embodiment, the weighing module further includes a mounting bracket configured to securely assemble the servo motor and the weighing assembly.

[0020] In one embodiment, the wheelbase adjustment and longitudinal servo centering device of the bogie static load test bench further includes:

[0021] at least two weighing bottom beams, each weighing bottom beam having a longitudinal centerline;

[0022] Each weighing bottom beam is provided with two groups of weighing modules, and the two groups of weighing modules are configured to be symmetrically arranged on the weighing bottom beam based on the longitudinal center line.

[0023] In one embodiment, the wheelbase adjustment and longitudinal servo centering device of the bogie static load test bench has a vertical longitudinal center reference line and a transverse center reference line, and the intersection of the longitudinal center reference line and the transverse center reference line is the center point of the wheelbase adjustment and longitudinal servo centering device of the bogie static load test bench;

[0024] The two weighing bottom beams are configured to be symmetrically arranged based on the longitudinal center reference line, and the longitudinal center lines both coincide with the transverse center reference line.

[0025] The aforementioned bogie static load test bench wheelbase adjustment and longitudinal servo centering device, because the weighing module drives the weighing assembly to move via a drive mechanism and is provided with a displacement sensor for detecting the displacement of the weighing assembly, not only improves the moving speed of the weighing assembly but also determines the displacement value of the weighing assembly, thereby providing the bogie static load test bench wheelbase adjustment and longitudinal servo centering device with the advantage of high operating efficiency. Furthermore, the drive mechanism utilizes a servo motor to drive the rotation of a drive gear, which meshes with the rack to move the weighing assembly relative to the linear guide assembly. This effectively controls the movement accuracy of the weighing assembly, thereby providing the bogie static load test bench wheelbase adjustment and longitudinal servo centering device with the advantage of high precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the coordination of a linear guide assembly, a weighing assembly, and a drive mechanism according to an embodiment of the present application.

[0027] Figure 2 Schematic diagram of the coordination of a displacement sensor, a rack, and a weighing bottom beam according to an embodiment of the present application.

[0028] Figure 3 3D is a perspective view of a weighing unit according to an embodiment of the present application.

[0029] Figure 4 1. A top view of a wheelbase adjustment and longitudinal servo centering device for a bogie static load test bench according to an embodiment of the present application.

[0030] Figure 5 Schematic diagram of the structure of a bogie according to one embodiment of the present application.

[0031] Figure Number:

[0032] 1. Linear guide assembly; 10. Linear guide rail; 10a. First linear guide rail; 10b. Second linear guide rail;

[0033] 2. Weighing assembly; 21a. Wheel bearing platform; 21b. Support column; 22. Slider; 22a. First slider; 22c. Third slider; 22d. Fourth slider;

[0034] 3. Displacement sensor; 30. Magnetostrictive displacement sensor; 30a. Measuring rod; 30b. Moving part; 30c. Connecting part;

[0035] 4. Rack;

[0036] 5. Driving mechanism; 51. Servo motor; 52. Driving gear; 53. Reducer;

[0037] 6. Mounting bracket; 61. Assembly plate; 62. Support plate;

[0038] 100, weighing unit; 101, weighing bottom beam; S1, longitudinal center line;

[0039] 200. Wheelbase adjustment and longitudinal servo centering device for bogie static load test bench; L1, longitudinal center reference line; L2, transverse center reference line;

[0040] 100a, first weighing unit; 100b, second weighing unit;

[0041] 2a, first weighing assembly; 2b, second weighing assembly; 2c, third weighing assembly; 2d, fourth weighing assembly;

[0042] 300, bogie; 301, first wheel; 302, second wheel; 303, third wheel; 304, fourth wheel. DETAILED DESCRIPTION

[0043] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0044] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0045] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0046] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0047] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0048] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0049] Combine Figures 1 to 4 As shown, according to some embodiments of the present application, the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200 includes at least four sets of weighing modules, wherein Figure 1 and Figure 2 As shown, the weighing module includes a linear guide component 1, a weighing component 2, a displacement sensor 3, a rack 4 and a driving mechanism 5.

[0050] See Figure 1 and Figure 2As shown, the weighing assembly 2 is assembled with the linear guide assembly 1 and is configured to slide along the linear guide assembly 1. It can also be understood that the weighing assembly 2 can move relative to the linear guide assembly 1 along the length direction of the linear guide assembly 1. The displacement sensor 3 is configured to detect the displacement value of the weighing assembly 2 so that the displacement sensor 3 is used to detect the displacement value of the weighing assembly 2 during the relative movement of the weighing assembly 2 and the linear guide assembly 1.

[0051] See Figure 1 and Figure 2 As shown, the drive mechanism 5 includes a servo motor 51 and a drive gear 52. The servo motor 51 is fixedly assembled with the weighing assembly 2. The servo motor 51 drives the drive gear 52 to rotate, so that the drive gear 52 engages with the rack 4 for transmission. The length direction of the rack 4 is parallel to the length direction of the linear guide assembly 1, thereby achieving the effect of the servo motor 51 driving the weighing assembly 2 to move relative to the linear guide assembly 1. It should be noted that the servo motor 51 has the characteristics of precise control of position, speed and torque.

[0052] Servo motor 51 drives gear 52, which meshes with rack 4. This allows precise control of the relative movement of weighing assembly 2 and linear guide assembly 1, with a precision of ±0.1 mm. This also simplifies maintenance. Displacement sensor 3 is configured to detect the displacement of weighing assembly 2, enabling more accurate control of its displacement.

[0053] In summary, since the weighing module drives the weighing assembly 2 to move via the drive mechanism 5 and is provided with a displacement sensor 3 for detecting the displacement of the weighing assembly 2, it is not only possible to increase the movement speed of the weighing assembly 2, but also to determine the displacement value of the weighing assembly 2, thereby enabling the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200 to have the advantage of high working efficiency. In addition, in the drive mechanism 5, a servo motor 51 is used to drive the drive gear 52 to rotate, and the drive gear 52 is meshed with the rack 4 to transmit the movement of the weighing assembly 2 relative to the linear guide assembly 1. This effectively controls the movement accuracy of the weighing assembly 2, thereby enabling the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200 to have the advantage of high precision. In addition, the weighing module also has the advantages of simple structure and low maintenance cost.

[0054] See Figure 1 As shown, in some embodiments, the weighing assembly 2 includes a weighing body and a sliding fitting, the sliding fitting is fixed to the weighing body, and the sliding fitting is configured to slide with the linear guide assembly 1 .

[0055] For example, combined Figure 4 and Figure 5As shown, in a bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200, a weighing element is configured to carry a bogie wheel and detect the load on the wheel. Because the sliding mating element is slidably mounted on the linear guide assembly 1 and is fixedly connected to the weighing element, the sliding mating element moves relative to the linear guide assembly 1 along its length, thereby achieving the effect of moving the weighing assembly 2 along the length of the linear guide assembly 1.

[0056] In the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200, since the weighing component 2 can move relative to the linear guide component 1, the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200 can be applied to bogies with different wheelbases, thereby improving the versatility of the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200.

[0057] See Figure 1 As shown, in some embodiments, the weighing body includes a wheel-bearing platform 21 a in the shape of a regular quadrilateral and four support columns 21 b , and correspondingly, the sliding fitting includes four sliders 22 .

[0058] See Figure 1 As shown, in the thickness direction of the wheel bearing platform 21a (ie Figure 1 ), one end of each of the four support columns 21b is connected below the wheel support platform 21a, and the other ends of the four support columns 21b are connected to four sliders 22 in a one-to-one correspondence. Furthermore, the linear guide assembly 1 comprises two parallel linear guide rails 10. Of the four sliders 22 of the sliding mating member, every two sliders 22 are configured to slide with one linear guide rail 10, thereby achieving the effect of moving the weighing assembly 2 relative to the linear guide assembly 1.

[0059] For example, see Figure 1 As shown, the structure of the wheel supporting platform 21a is a rectangular plate, and the four sliders 22 are respectively the first slider 22a, the second slider, the third slider 22c and the fourth slider 22d. In the width direction of the wheel supporting platform 21a, the first slider 22a and the second slider are located on one side of the wheel supporting platform 21a, and the third slider 22c and the fourth slider 22d are located on the other side of the wheel supporting platform 21a.

[0060] In addition, in the length direction of the wheel supporting platform 21a, the first slider 22a and the third slider 22c are both located on the front side of the wheel supporting platform 21a, and the second slider and the fourth slider 22d are both located on the rear side of the wheel supporting platform 21a, and in the width direction of the wheel supporting platform 21a, the first slider 22a and the third slider 22c are symmetrically arranged, and the second slider and the fourth slider 22d are symmetrically arranged, so that the first slider 22a, the second slider, the third slider 22c and the fourth slider 22d are evenly arranged along the circumference of the wheel supporting platform 21a.

[0061] See Figure 1 As shown, the two linear guide rails 10 are respectively a first linear guide rail 10a and a second linear guide rail 10b, the first slider 22a and the second slider are both assembled on the first linear guide rail 10a, and the third slider 22c and the fourth slider 22d are both assembled on the second linear guide rail 10b.

[0062] In the above example, the force exerted by the wheel on the wheel bearing platform 21a can be evenly applied to the two linear guides 10 (i.e., the first linear guide 10a and the second linear guide 10b) through the four sliders 22, thereby ensuring the smoothness of the relative sliding between the weighing component 2 and the linear guide component 1, and reducing the impact on the movement accuracy of the weighing component 2.

[0063] It should be noted that, in the above embodiment, the weighing assembly 2 is described as having four support columns 21b and the sliding mating member including four sliders 22. However, the present application does not impose any specific restrictions on the number of support columns 21b and the corresponding number of sliders 22. For example, the weighing assembly 2 may also have six support columns 21b and six corresponding sliders 22.

[0064] Combine Figure 2 and Figure 3 As shown, the rack 4 and the displacement sensor 3 are both arranged between two linear guide rails 10, which makes the structure of the weighing module compact.

[0065] For example, see Figure 3 As shown, when both linear guides 10 are fixedly mounted on the weighing base beam 101, they are spaced apart in a direction perpendicular to their lengths (i.e., their widths). The rack 4 and displacement sensor 3 are both fixed to the weighing base beam 101 and positioned between the two linear guides 10. This prevents the rack 4 and displacement sensor 3 from occupying additional space within the weighing base beam 101, achieving a compact weighing module structure.

[0066] See Figure 1As shown, in some embodiments, the driving mechanism 5 also includes a reducer 53, which is transmission-connected between the servo motor 51 and the driving gear 52. The reducer 53 is used to reduce the power output by the servo motor 51 and increase the torque, so that when the weighing assembly 2 carries a bogie with a large mass, the servo motor 51 can still drive the weighing assembly 2 to move.

[0067] In addition to its basic speed reduction function, reducer 53 also has a certain speed regulation capability. It can adjust the speed of its output shaft according to operating requirements, thereby adjusting the speed of drive gear 52 to meet different operating conditions. Reducer 53 can reduce the no-load operation of servo motor 51, thereby stabilizing the machine's operating performance, reducing vibration and shock, and improving the stability and reliability of drive mechanism 5.

[0068] See Figure 2 As shown, in some embodiments, displacement sensor 3 is a magnetostrictive displacement sensor 30, which includes a measuring rod 30a and a movable member 30b. The movable member 30b moves relative to the measuring rod 30a. Magnetostrictive displacement sensor 30 is a high-precision measurement device based on the magnetostrictive effect. It can accurately detect the absolute position of the movable member 30b and the measuring rod 30a, thereby measuring the actual displacement of the movable member 30b.

[0069] For example, see Figure 2 As shown, the measuring rod 30a is fixedly installed on the weighing bottom beam 101, and the movable part 30b can be movably assembled on the measuring rod 30a so that the movable part 30b can move relative to the measuring rod 30a, and the movable part 30b also has a connecting part 30c, which is used to connect with the weighing component 2, so that when the weighing component 2 moves relative to the linear guide component 1, the weighing component 2 drives the movable part 30b to move, thereby realizing that the magnetostrictive displacement sensor 30 is used to detect the displacement value of the weighing component 2.

[0070] In some embodiments, the displacement sensor 3 may also be any one of linear sensors such as a resistive linear displacement sensor, an inductive linear displacement sensor, and a photoelectric linear displacement sensor.

[0071] In some embodiments, the number of racks 4 can be configured as two, and the drive gear 52 is meshed between the two spaced-apart racks 4. It can also be understood that one drive gear 52 is simultaneously meshed with two symmetrically arranged racks 4 for transmission. The drive gear 52 is meshed with the racks 4 to transmit transmission, so that the drive gear 52 moves relative to the rack 4 along the length of the rack 4. By providing one drive gear 52 to simultaneously mesh with two symmetrically arranged racks 4, the risk of the drive gear 52 and the rack 4 slipping during the movement of the drive gear 52 along the length of the rack 4 can be avoided, thereby improving the stability of the drive gear 52, thereby enabling more precise control of the relative movement accuracy of the weighing assembly 2 and the linear guide assembly 1.

[0072] See Figure 1 As shown, in some embodiments, the weighing module also includes a mounting bracket 6, which is configured to fix the servo motor 51 and the weighing component 2. When the servo motor 51 drives the driving gear 52 to rotate, the driving gear 52 engages with the rack 4 to transmit the weighing component 2 so that the weighing component 2 slides along the linear guide component 1.

[0073] For example, see Figure 1 As shown, the mounting bracket 6 includes an assembly plate 61 and a support plate 62, and the assembly plate 61 and the support plate 62 are vertically connected. When the mounting bracket 6 is installed on the weighing component 2, the extension direction of the assembly plate 61 (the width direction or length direction of the assembly plate 61) is parallel to the thickness direction of the wheel bearing platform 21a, and the support plate 62 is arranged parallel to the wheel bearing platform 21a.

[0074] In the thickness direction of the support plate 62 (ie Figure 1 ), the reducer 53 is fixedly mounted above the support plate 62, and the servo motor 51 is fixed above the reducer 53 to achieve the effect of the servo motor 51 being fixedly mounted on the mounting bracket 6, so that the servo motor 51 is fixedly connected to the weighing assembly 2 through the mounting bracket 6.

[0075] In addition, the support plate 62 is formed with an escape hole for escaping the output shaft of the reducer 53, so that the output shaft of the reducer 53 passes through the support plate 62 and is fixedly connected to the drive gear 52. The servo motor 51 is configured to drive the input shaft of the reducer 53 to rotate, so that the output shaft of the reducer 53 drives the drive gear 52 to rotate.

[0076] See Figure 3As shown, in some embodiments of the present application, the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200 further includes at least two weighing beams 101, each weighing beam 101 having a longitudinal centerline S1. It can also be understood that, in the length direction of the weighing beam 101, the centerline of the weighing beam 101 is the longitudinal centerline S1. Each weighing beam 101 is provided with two sets of weighing modules, and the two sets of weighing modules are configured to be symmetrically arranged on the weighing beam 101 based on the longitudinal centerline S1.

[0077] Combine Figure 2 and Figure 3 As shown, two groups of linear guide assemblies 1, two displacement sensors 3, and two racks 4 are stacked and fixed on the weighing base beam 101 based on the longitudinal center line S1, and two groups of weighing assemblies 2 are respectively assembled on the linear guide assemblies 1 to achieve the effect that the two groups of weighing assemblies 2 are configured to be symmetrically arranged on the weighing base beam 101 based on the longitudinal center line S1.

[0078] See Figure 2 As shown, by driving the weighing components 2 in the two weighing modules to move closer to or away from each other, that is, one weighing component 2 moves toward the left and the other weighing component 2 moves toward the right, or one weighing component 2 moves toward the right and the other weighing component 2 moves toward the left, the spacing between the two weighing components 2 in the length direction of the weighing base beam 101 is adjusted, so that the wheelbase adjustment and longitudinal servo centering device 200 of the bogie static load test bench is suitable for bogies with different wheelbases.

[0079] See Figure 4 As shown, according to some embodiments of the present application, the wheelbase adjustment and longitudinal servo centering device 200 of the bogie static load test bench has a vertical longitudinal center reference line L1 and a transverse center reference line L2, and the intersection of the longitudinal center reference line L1 and the transverse center reference line L2 is the center point of the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200.

[0080] The two weighing bottom beams 101 in the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200 are configured to be symmetrically arranged based on the longitudinal center reference line L1, and the longitudinal center line S1 coincides with the transverse center reference line L2.

[0081] For example, see Figure 4As shown, a bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200 having two weighing units 100 is used as an example for description. Each weighing unit 100 includes a weighing base beam 101 and two weighing modules. The two weighing units 100 are respectively a first weighing unit 100a and a second weighing unit 100b. The two weighing assemblies 2 in the first weighing unit 100a are respectively a first weighing assembly 2a and a second weighing assembly 2b, and the two weighing assemblies 2 in the second weighing unit 100b are respectively a third weighing assembly 2c and a fourth weighing assembly 2d. Figure 4 The X direction shown in is the longitudinal direction of the wheelbase adjustment and longitudinal servo centering device 200 of the bogie static load test bench. Figure 4 The Y direction shown in the figure is the lateral direction of the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200. It should be noted that the longitudinal center reference line L1 is a straight line intersecting the midpoint of the longitudinal dimension of the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200, and the transverse center reference line L2 is a straight line intersecting the midpoint of the transverse dimension of the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200.

[0082] See Figure 5 As shown, the bogie 300 has two wheelsets, wherein each wheelset has two wheels, and the four wheels are a first wheel 301 , a second wheel 302 , a third wheel 303 and a fourth wheel 304 . Figure 5 The X direction shown in is the length direction of the bogie 300, Figure 5 The Y direction shown in FIG. 3 is the width direction of the bogie 300 . Figure 5 The center reference line L3 shown in FIG is a straight line intersecting the midpoint of the longitudinal dimension of the bogie 300, and the center reference line L4 is a straight line intersecting the midpoint of the transverse dimension of the bogie 300. The intersection of the center reference line L3 and the center reference line L4 is the center point of the bogie 300. It should also be noted that the distance between the axis of the first wheel 301 and the axis of the second wheel 302 along the length direction of the bogie 300 is the wheelbase of the bogie 300.

[0083] Combine Figure 4 and Figure 5As shown, when a bogie 300 is placed on the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200, the first wheel 301 is located on the first weighing assembly 2a, the second wheel 302 is located on the second weighing assembly 2b, the third wheel 303 is located on the third weighing assembly 2c, and the fourth wheel 304 is located on the fourth weighing assembly 2d. Thus, by adjusting the longitudinal spacing between the first weighing assembly 2a and the second weighing assembly 2b, as well as the longitudinal spacing between the third weighing assembly 2c and the fourth weighing assembly 2d, the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200 can be adapted to bogies with different wheelbases.

[0084] In the height direction of the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200, the higher the degree of overlap between the center point of the bogie 300 and the center point of the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200, the more accurate the test data. Therefore, in the process of testing the bogie 300 using the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200, it is necessary to ensure that the center point of the bogie 300 and the center point of the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200 overlap in the height direction.

[0085] In some embodiments, when the bogie 300 is just placed on the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200, it is easily affected by the inertia force of the bogie 300, so that the bogie 300 moves in the left and right directions of the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200. It can also be understood that when affected by the inertia force of the bogie 300, the center point of the bogie 300 and the center point of the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200 are staggered in the height direction. Therefore, before using the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200 to test the bogie 300, the center point of the bogie 300 needs to be moved to coincide with the center point of the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200.

[0086] For example, during the longitudinal movement of the bogie 300 along the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200, at least one of the first weighing assembly 2a, the second weighing assembly 2b, the third weighing assembly 2c, and the fourth weighing assembly 2d is controlled and driven to move, thereby achieving the effect of longitudinal movement of the bogie 300 along the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200. For example, if the center point of the bogie 300 is located to the right of the center point of the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200, the first weighing assembly 2a is controlled and driven to move toward the left, while the bogie 300 drives the second weighing assembly 2b, the third weighing assembly 2c, and the fourth weighing assembly 2d to move toward the left at the same time, thereby achieving the effect of longitudinal movement of the bogie 300 along the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200, thereby achieving the center point of the bogie 300 coinciding with the center point of the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200. It should be noted that when the first weighing component 2a is in an actively moving state, the driving mechanism 5 for driving the first weighing component 2a to move is working. At this time, the driving mechanisms 5 for driving the second weighing component 2b, the third weighing component 2c and the fourth weighing component 2d are in a power-off state to avoid interfering with the driving mechanism 5 for driving the first weighing component 2a to move.

[0087] In some embodiments, the displacement sensor 3 in the weighing module is communicatively connected to the servo motor 51, and the displacement sensor 3 is configured to control the operating state of the servo motor 51. The displacement sensor 3 measures the displacement value of the corresponding weighing assembly 2 and calculates the offset between the weighing assembly 2 and the center point of the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200. The servo motor 51 then drives the weighing assembly 2 to a corresponding position based on the offset, thereby achieving the effect of aligning the center point of the bogie 300 with the center point of the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200.

[0088] It should also be added that the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200 includes two independent weighing units 100. In this way, for the transportation process of the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200, two weighing units 100 need to be transported. This can effectively reduce the space occupied by the bogie static load test bench wheelbase adjustment and longitudinal servo centering device 200, thereby reducing transportation costs and facilitating handling.

[0089] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0090] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A wheelbase adjustment and longitudinal servo centering device for a bogie static load test bench, characterized in that: include: At least four weighing modules, each weighing module comprising a linear guide assembly, a weighing assembly, a displacement sensor, a rack, and a drive mechanism; The weighing assembly is assembled in cooperation with the linear guide assembly, and the weighing assembly is configured to slide along the linear guide assembly; The displacement sensor is configured to detect a displacement value of the weighing assembly; The length direction of the rack is parallel to the length direction of the linear guide assembly; The driving mechanism includes a servo motor and a driving gear. The driving gear drives the driving gear to rotate. The servo motor is fixedly assembled with the weighing component, and the driving gear is engaged with the rack.

2. The wheelbase adjustment and longitudinal servo centering device for a bogie static load test bench according to claim 1, characterized in that: The weighing assembly includes a weighing body and a sliding fitting member, wherein the sliding fitting member is fixed to the weighing body and is configured to be slidably fitted with the linear guide assembly.

3. The wheelbase adjustment and longitudinal servo centering device for a bogie static load test bench according to claim 2, characterized in that: The linear guide assembly is two parallel linear guide rails; The sliding fitting comprises four sliders, wherein every two sliders are configured to be slidingly fitted with one linear guide rail; The weighing body includes a wheel supporting platform in the shape of a regular quadrilateral and four support columns. In the thickness direction of the wheel supporting platform, one end of the four support columns is connected to the bottom of the wheel supporting platform, and the other ends of the four support columns are respectively connected to the four sliders in a one-to-one correspondence.

4. The wheelbase adjustment and longitudinal servo centering device for a bogie static load test bench according to claim 3, characterized in that: The rack and the displacement sensor are both arranged between the two linear guide rails.

5. The wheelbase adjustment and longitudinal servo centering device for a bogie static load test bench according to claim 1, characterized in that: The driving mechanism further includes a reducer, which is transmission-connected between the servo motor and the driving gear.

6. The wheelbase adjustment and longitudinal servo centering device for a bogie static load test bench according to claim 1, characterized in that: The displacement sensor is a magnetostrictive displacement sensor.

7. The wheelbase adjustment and longitudinal servo centering device for a bogie static load test bench according to claim 1, characterized in that: The number of the racks is configured to be two, and the driving gear is engaged between the two racks disposed at intervals.

8. The wheelbase adjustment and longitudinal servo centering device for a bogie static load test bench according to claim 1, characterized in that: Also included is a mounting bracket configured to securely assemble the servo motor and the weighing assembly.

9. The wheelbase adjustment and longitudinal servo centering device for a bogie static load test bench according to any one of claims 1 to 8, characterized in that: Also includes: at least two weighing bottom beams, each weighing bottom beam having a longitudinal centerline; Each weighing bottom beam is provided with two groups of weighing modules, and the two groups of weighing modules are configured to be symmetrically arranged on the weighing bottom beam based on the longitudinal center line.

10. The wheelbase adjustment and longitudinal servo centering device for a bogie static load test bench according to claim 9, characterized in that: It has a vertical longitudinal center reference line and a transverse center reference line, and the intersection of the longitudinal center reference line and the transverse center reference line is the center point of the wheelbase adjustment and longitudinal servo centering device of the bogie static load test bench; The two weighing bottom beams are configured to be symmetrically arranged based on the longitudinal center reference line, and the longitudinal center lines both coincide with the transverse center reference line.

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