Testing device for locomotive spring parking cylinder and use method

Abstract

The invention relates to a testing device for a locomotive spring parking cylinder and a using method, the testing device comprises a base, a support, a connecting frame, a spring parking cylinder installation limiting mechanism and a testing mechanism, the support is connected to the base, the spring parking cylinder installation limiting mechanism is arranged in the connecting frame, the testing mechanism is installed on the support, and the testing mechanism comprises an ejector rod. A pressure sensor is installed on the ejector rod, the connecting frame is connected with the base in a height-adjustable mode, in the testing process, a screw at the output end of the spring parking cylinder can be in butt joint with the ejector rod, and after the screw at the output end of the spring parking cylinder acts, the spring parking cylinder is tested based on readings of the pressure sensor. The test device can efficiently and reliably complete the detection of all items such as brake release action test, manual release test, leakage test, brake force test and the like before the spring parking cylinder leaves a factory, and provides powerful guarantee for the product quality of the spring parking cylinder and the parking safety of a locomotive vehicle on a track, especially on a ramp.

Description

Technical Field

[0001] The present invention relates to the technical field of locomotive spring parking cylinder design, and in particular to a test device for a locomotive spring parking cylinder and a use method thereof. Background Art

[0002] The locomotive unit brake is a mechanical device that implements the locomotive braking function and provides braking force for the locomotive. The spring parking cylinder is a basic braking device used in a variety of export locomotives to implement the parking brake of the locomotive. Effective performance testing is the prerequisite for reliable product quality assurance.

[0003] When the locomotive or vehicle is running, the spring parking cylinder is filled with compressed air of the designed pressure, which compresses the spring and keeps the parking brake in the released state. After the locomotive or vehicle stops, to keep it in the parked state, the compressed air in the spring parking cylinder can be completely discharged into the atmosphere by operating the brake handle. The force of the spring is amplified by the brake lever connected to the outside of the spring parking cylinder, so that the brake shoe presses the wheel pair tread, generating a strong friction force and implementing the parking brake. This effectively prevents the occurrence of slipping accidents and ensures the parking safety of locomotives and vehicles on the track, especially on ramps. In the case of failure of the common brake, the spring parking cylinder can also be used for emergency braking. Before the locomotive or vehicle is put back into operation, the brake handle should be operated to allow compressed air to enter the spring parking cylinder and compress the spring to restore the parking brake to the released state. The manual release lever can also be pulled to achieve manual release. At this time, the lock between the screw and nut inside the spring parking cylinder is released, and the two rotate relative to each other, causing the spring to stretch and the spring force to be released, thereby achieving the release of the parking brake. When this operation is adopted, the spring parking cylinder needs to be refilled with compressed air that meets the design pressure in order to reset its function. When the spring parking cylinder is exhausted again, the ability to apply the parking brake is restored.

[0004] Working principle Figure 1 As shown, when there is no pressure in the cylinder a1, the bellows a2 drives the screw a4 and the crosshead a5 to move to the right under the push of the spring a3, so that the brake shoe a7 rests on the wheel a8, producing a braking effect. When pneumatic relief is performed, the control valve a9 is moved to the air supply position, and the pressure of the main air cylinder enters the right side of the bellows a2 to compress the spring a3, and drives the screw a4 and the crosshead a5 to move to the left together, and through the brake lever a6, the brake shoe a7 connected to it leaves the wheel a8, and is in a relieved state. When the locomotive vehicle has no power or wind source, to relieve the spring parking cylinder, just pull the manual relief rod, and the screw a4 will extend under the action of the spring and non-self-locking thread to achieve manual relief.

[0005] When testing the existing locomotive spring parking cylinder, the assembled spring cylinder is placed on the work platform, and the sealing of the brake is tested by the pressure holding machine. The spring cylinder is filled with 500Kpa of air and the pressure is maintained for 3 minutes. The leakage cannot exceed 10Kpa. If it exceeds this range, it will be reassembled and tested again. If it is qualified, it can be sent to the next process to test the brake itself. The motion guide part of the traditional comprehensive test device adopts two rigid guide rails for sliding fit (with large resistance; high requirements for dimensional and geometric tolerance processing accuracy, and difficult to adjust the disadvantages) or two pairs of linear bearings and guide columns (with small resistance; but high requirements for dimensional and geometric tolerance processing accuracy, and difficult to adjust the disadvantages). Because of the manufacturing tolerances of the tested spring parking cylinder and the test bench, and the gap between the mounting bolts and bolt holes of the spring parking cylinder, the braking force output axis and the center of the test guide motion part will not coincide, resulting in a large internal resistance, resulting in a low measured braking force. Some qualified spring parking cylinders are judged as unqualified. At the same time, it may cause abnormal motion function and inadequate relief action. Summary of the invention

[0006] In response to the technical problems raised above, a test device and a method for using a spring parking cylinder for a locomotive having good adaptability and adjustment capabilities are provided.

[0007] The technical means adopted by the present invention are as follows:

[0008] A test device for a locomotive spring parking cylinder comprises a base, a bracket, a connecting frame, a spring parking cylinder installation limit mechanism and a testing mechanism, wherein the bracket is connected to the base, the spring parking cylinder installation limit mechanism is arranged in the connecting frame, the testing mechanism is installed on the bracket, the testing mechanism comprises a push rod, a pressure sensor is installed on the push rod, and the connecting frame is connected to the base in an adjustable height. During the test, the output end screw of the spring parking cylinder can dock with the push rod. After the output end screw of the spring parking cylinder is actuated, the spring parking cylinder is tested based on the indication of the pressure sensor.

[0009] Furthermore, the testing mechanism also includes a first connecting shaft, a second connecting shaft, a bearing, a guide wheel, an installation box and connecting bolts. A plurality of connecting bolts are installed on the bracket, and the ends of the connecting bolts are fixedly connected to the first connecting shaft. A positioning groove is opened inside the other end of the first connecting shaft, and the second connecting shaft is connected in a limited sliding manner in the positioning groove. A bearing is installed on the second connecting shaft, and a guide wheel is fixedly connected to the bearing. The guide wheel is limitedly slidably connected to the installation box, and the top rod is installed on the installation box.

[0010] Furthermore, the height of the connecting frame is adjustably connected to the base based on a height adjustment device, and the height adjustment device includes a first servo motor, a first bidirectional threaded rod, a moving block, a push rod and a connecting plate, the first servo motor is arranged on the base, the output shaft of the first servo motor is connected to the first bidirectional threaded rod, and a plurality of moving blocks are connected to the first bidirectional threaded rod, and the upper end of each moving block is rotatably connected to a push rod, and the other end of the push rod is rotatably connected to the connecting plate, and the connecting plate is connected to the connecting frame.

[0011] Furthermore, a protective shell is sleeved on the outside of the connecting frame.

[0012] Furthermore, the bottom of the moving block fits with the inner bottom end surface of the base.

[0013] Furthermore, the spring parking cylinder installation limit mechanism includes a vertical clamping mechanism and a horizontal clamping mechanism, the vertical clamping mechanism includes a second servo motor, a second bidirectional threaded rod, a transmission belt, a connecting block and a clamping plate, the second servo motor is installed in the connecting frame, the output shaft of the second servo motor is connected to the second bidirectional threaded rod, and another second bidirectional threaded rod parallel to the second bidirectional threaded rod is arranged on the other side of the connecting frame, the transmission belt is arranged on the second bidirectional threaded rod, and two connecting blocks are arranged on each of the second bidirectional threaded rods, and the two connecting blocks on the same horizontal line are connected to the corresponding clamping plates, and the two connecting blocks on the same horizontal line are symmetrically distributed on the left and right sides of the second bidirectional threaded rod, and the vertical clamping of the spring parking cylinder is completed by the arranged clamping plate; the horizontal clamping mechanism includes a double-headed motor, a transmission threaded rod, a horizontal plate and a baffle, the double-headed motor is arranged in the clamping plate, the transmission threaded rods are arranged on both sides of the double-headed motor, the transmission threaded rods are connected to the horizontal plate, and the baffle is connected to the horizontal plate, and the horizontal clamping of the spring parking cylinder is completed by the baffle.

[0014] Furthermore, the cross section of the baffle is a right-angled trapezoid.

[0015] Furthermore, a rubber pad is installed on the clamping plate.

[0016] Furthermore, a slot is provided in the first connecting shaft, a return spring is fixedly connected in the second connecting shaft, the other end of the return spring is fixedly connected to a clamping rod, the clamping rod is limitedly slidably connected in the second connecting shaft, the end of the clamping rod is snap-connected in the slot, a traction rope is fixedly connected to the clamping rod, the traction rope is limitedly slidably connected in the second connecting shaft, and the end of the traction rope is fixedly connected to a connecting ring.

[0017] The present invention also discloses a method for using the above-mentioned test device for the locomotive spring parking cylinder, comprising the following steps:

[0018] Place the locomotive spring parking cylinder on the clamping plate, and complete the clamping and limiting of the locomotive spring parking cylinder by installing the limiting mechanism of the spring parking cylinder;

[0019] By controlling the height adjustment device, the spring parking cylinder and the mounting box are aligned;

[0020] Push the installation box to move on the guide wheel to adjust the use position of the installation box. After the installation box is adjusted, turn the connecting bolts to fix the installation box;

[0021] By supplying air to the locomotive's spring parking cylinder, when the spring parking cylinder can operate normally, the pressure sensor on the push rod can be pushed for inspection. If the spring parking cylinder is unqualified and damaged and cannot be used, the pressure sensor will not be pressurized and a smooth inspection can be performed.

[0022] Furthermore, during the test, when the test device has been working for a long time, the staff completes the disassembly of the guide wheel by pulling the connecting ring outward; after the guide wheel is inspected, maintained or replaced, the staff pulls the connecting ring on the second connecting shaft outward again, and at the same time inserts the second connecting shaft into the positioning groove on the first connecting shaft to complete the snap-on installation of the guide wheel.

[0023] Compared with the prior art, the present invention has the following advantages: the present invention realizes precise adjustment and alignment of the braking force output axis and the center of the test guide motion part, thereby reducing the mechanism movement resistance caused by inaccurate alignment; and takes measures to reduce the friction resistance of the entire mechanism, thereby minimizing the internal resistance of the equipment and effectively ensuring the detection accuracy.

[0024] The brake test device designed by the present invention can effectively detect various performance indicators of the brake itself. This test device can efficiently and reliably complete the detection of all items such as brake\relief action test, hand relief test, leakage test, braking force test, etc. before the spring parking cylinder leaves the factory, providing a strong guarantee for the product quality of the spring parking cylinder and the parking safety of locomotives and vehicles on tracks, especially on ramps. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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 briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 This is a schematic diagram of the spring parking cylinder principle.

[0027] Figure 2 It is a schematic diagram of the overall structure of the present invention.

[0028] Figure 3 It is a front view of a partial device of the present invention under perspective.

[0029] Figure 4 It is a top view of a partial device of the present invention under perspective.

[0030] Figure 5 for Figure 4 A magnified view of part A.

[0031] Figure 6 It is a right side sectional view of the present invention.

[0032] Figure 7 This is a schematic diagram of the installation limit mechanism of the spring parking cylinder of the present invention.

[0033] Figure 8 It is a structural schematic diagram of the guide wheel disassembly and assembly part of the present invention.

[0034] Fig. 9 for Figure 8 Top view of the .

[0035] In the figure: 1, base; 2, bracket; 3, connecting bolt; 4, bearing; 5, guide wheel; 6, installation box; 7, push rod; 8, pressure sensor; 9, spring parking cylinder of the locomotive to be tested; 10, first servo motor; 11, first bidirectional threaded rod; 12, moving block; 13, push rod; 14, connecting plate; 15, connecting frame; 16, second servo motor; 17, second bidirectional threaded rod; 18, transmission belt; 19, protective shell; 20, connecting block; 21, splint; 22. rubber pad; 23. first connecting shaft; 24. positioning groove; 25. clamping groove; 26. second connecting shaft; 27. return spring; 28. clamping rod; 29. ​​traction rope; 30. connecting ring; 31. double-headed motor; 32. transmission threaded rod; 33. cross plate; 34. baffle; a1. cylinder; a2. bellows; a3. spring; a4. screw; a5. crosshead; a6. brake lever; a7. brake shoe; a8. wheel; a9. control valve. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0039] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0040] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0041] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0042] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0043] The spring parking cylinder of the present invention has the following advantages: 1. Small size, light weight, compact structure and easy installation. 2. Automatic action, safe and reliable, with large braking force. 3. Can replace the hand brake of the locomotive, saving space under the vehicle. 4. No iron shoe brake is required on the rails during parking, preventing accidental scratches between the wheels and the rails. 5. Installed on some special vehicles, it can ensure safe operation on long and steep slopes. Especially in the case of insufficient air filling, it can ensure that the vehicle will not be released.

[0044] Before the spring parking cylinder leaves the factory, it needs to complete the brake\relief action test, hand relief test, leakage test, braking force test and other test points, and can only be sent out after all the test points are qualified. The test device responsible for performance testing should be able to complete the test of all the above points reliably and efficiently.

[0045] For this reason, Figures 1 to 7As shown, the embodiment of the present invention discloses a test device for a spring parking cylinder of a locomotive, the device comprises a base 1, a bracket 2, a connecting frame 15, a spring parking cylinder installation limit mechanism and a test mechanism, the bracket 2 is connected to the base 1, the spring parking cylinder installation limit mechanism is arranged in the connecting frame 15, the test mechanism is installed on the bracket 2, the test mechanism comprises a push rod 7, a pressure sensor 8 is installed on the push rod 7, the connecting frame 15 is connected to the base 1 with adjustable height, during the test, the output end screw of the spring parking cylinder 9 can dock with the push rod 7, after the output end screw of the spring parking cylinder is actuated, the spring parking cylinder 9 is tested based on the indication of the pressure sensor 8. During the specific test process, an electrical control cabinet with a proportional valve is equipped to complete the control of the compressed air used in the test.

[0046] The base 1 is the installation foundation of the bracket 2 and the connecting frame 15, and at the same time, it increases the height of the operating position of the personnel during the test, so that it conforms to ergonomics and is convenient for experimental operation. The spring parking cylinder installation limit mechanism is the installation component of the spring parking cylinder, which enables the spring parking cylinder to maintain the correct installation position during the performance test, and at the same time has sufficient strength to withstand the reaction force caused by the braking force test. Through the test mechanism, the braking\relieving action and braking force test of the spring parking cylinder are carried out, and the pressure sensor and motion guide device are set to ensure that the pressure sensor is aligned with the braking force axis, the movement is smooth and has the smallest possible mechanism movement resistance, and at the same time has sufficient strength to withstand the braking force.

[0047] Further, the test mechanism also includes a first connecting shaft 23, a second connecting shaft 26, a bearing 4, a guide wheel 5, an installation box 6 and a connecting bolt 3. A plurality of connecting bolts 3 are installed on the bracket, and the end of the connecting bolt 3 is fixedly connected to the first connecting shaft 23. A positioning groove 24 is provided inside the other end of the first connecting shaft 23, and the second connecting shaft 26 is limitedly slidably connected in the positioning groove 24. The second connecting shaft 26 is installed with a bearing 4, and the guide wheel 5 is fixedly connected to the bearing 4. The guide wheel 5 is limitedly slidably connected to the installation box 6, and the installation box 6 is installed with the push rod 7. The push rod 7 is installed at the center of one side of the installation box 6 to ensure that the push rod 7 can smoothly cooperate with the pressure sensor 8 for detection and viewing.

[0048] Further, the height of the connecting frame is adjustable and connected to the base based on a height adjustment device, and the height adjustment device includes a first servo motor 10, a first bidirectional threaded rod 11, a moving block 12, a push rod 13 and a connecting plate 14. The first servo motor 10 is arranged on the base 1, and the output shaft of the first servo motor 10 is connected to the first bidirectional threaded rod 11. A plurality of moving blocks 12 are connected to the first bidirectional threaded rod 11. The upper end of each moving block 12 is rotatably connected to a push rod 13, and the other end of the push rod 13 is rotatably connected to the connecting plate 14, and the connecting plate 14 is connected to the connecting frame 15. The first bidirectional threaded rod 11 is rotatably connected to the base 1. The connecting bolts 3 are symmetrically distributed on the left and right sides of the bracket 2. The connecting bolts 3 correspond to the second connecting shaft 26 through the first connecting shaft 23, and the second connecting shaft 26 corresponds to the guide wheel 5 through the bearing 4, which can ensure that the connecting bolts 3 and the guide wheel 5 can be stably installed and used on the installation box 6.

[0049] Furthermore, a protective shell 19 is sleeved on the outside of the connecting frame 15 .

[0050] Furthermore, the bottom of the moving block 12 is in contact with the bottom end surface of the base 1, so that the moving block 12 can be supported by the bottom end surface of the base 1 to move smoothly.

[0051] Furthermore, the spring parking cylinder installation limit mechanism includes a vertical clamping mechanism and a horizontal clamping mechanism, the vertical clamping mechanism includes a second servo motor 16, a second bidirectional threaded rod 17, a transmission belt 18, a connecting block 20 and a clamping plate 21, the second servo motor 16 is installed in the connecting frame 15, the output shaft of the second servo motor 16 is connected to the second bidirectional threaded rod 17, another second bidirectional threaded rod parallel to the second bidirectional threaded rod 17 is arranged on the other side of the connecting frame 15, the transmission belt 18 is arranged on the second bidirectional threaded rod 17, each of the second bidirectional threaded rods 17 is provided with two connecting blocks 20, and the two connecting blocks 20 on the same horizontal line The two connecting blocks 20 connected to the corresponding clamping plate 21 and on the same horizontal line are symmetrically distributed on the left and right sides of the second bidirectional threaded rod 17, which can ensure that the connecting blocks 20 on both sides can smoothly drive the clamping plate 21 to move so as to clamp and limit; the vertical clamping of the spring parking cylinder is completed by the set clamping plate 21; the horizontal clamping mechanism includes a double-headed motor 31, a transmission threaded rod 32, a horizontal plate 33 and a baffle 34, the double-headed motor 31 is arranged in the clamping plate 21, the transmission threaded rod 32 is arranged on both sides of the double-headed motor 31, the transmission threaded rod 32 is connected to the horizontal plate 33, and the baffle 34 is connected to the horizontal plate 33, and the horizontal clamping of the spring parking cylinder is completed by the baffle 34. The second bidirectional threaded rod 17 is rotatably connected to the connecting frame 15, and the baffles 34 are symmetrically distributed on both sides of the horizontal plate 33.

[0052] Furthermore, the baffle plate 34 is welded and fixed on the transverse plate 33 , and the cross section of the baffle plate 34 is a right-angle trapezoid.

[0053] Furthermore, a rubber pad 22 is installed on the clamping plate 21 .

[0054] Furthermore, a clamping slot 25 is provided in the first connecting shaft 23, a reset spring 27 is fixedly connected in the second connecting shaft 26, a clamping rod 28 is fixedly connected to the other end of the reset spring 27, the clamping rod 28 is limitedly slidably connected in the second connecting shaft 26, the end of the clamping rod 28 is clamped and connected in the clamping slot 25, a traction rope 29 is fixedly connected to the clamping rod 28, the traction rope 29 is limitedly slidably connected in the second connecting shaft 26, and the end of the traction rope is fixedly connected to a connecting ring 30. By using the cooperation of the clamping rod 28 and the clamping slot 25, the second connecting shaft 26 can be conveniently and stably clamped and installed and disassembled and separated, and then the disassembly, inspection, maintenance and replacement of the guide wheel 5 can be conveniently completed, thereby effectively avoiding the problem that the guide wheel 5 is worn out after long-term use, resulting in a decrease in subsequent detection accuracy.

[0055] The present invention also discloses a method for using the above-mentioned test device for the locomotive spring parking cylinder, comprising the following steps:

[0056] The spring parking cylinder 9 is placed on the splint 21. When the spring parking cylinder 9 is clamped and limited, the second servo motor 16 on the connecting frame 15 can be turned on. The second servo motor 16 drives the second bidirectional threaded rod 17 to rotate. When the second bidirectional threaded rod 17 rotates, it can smoothly drive the second bidirectional threaded rods 17 on both sides to rotate through the transmission belt 18 in the protective shell 19. When the second bidirectional threaded rod 17 rotates, it can drive the connecting blocks 20 on both sides to move. When the connecting blocks 20 on both sides move inward at the same time, it can drive the splint 21 to move at the same time. The splint 21 can cooperate with the rubber pad 22 to clamp and limit the spring parking cylinder 9 smoothly. At the same time, the double-headed motor 31 in the splint 21 is turned on. The double-headed motor 31 drives the transmission threaded rods 32 on both sides to operate. The transmission threaded rod 32 can drive the cross plate 33 to move when it rotates. When the cross plates 33 on both sides move inward at the same time, the cross plate 33 can drive the baffles 34 on both sides to contact the spring parking cylinder 9. At this time, under the joint action of the inclined surfaces of the baffles 34 on both sides, the left and right clamping limits and the front and rear clamping limits of the spring parking cylinder 9 can be completed at the same time. Cooperating with the upper and lower clamping limits of the upper and lower side clamping plates 21, the all-round clamping and fixing of the spring parking cylinder 9 can be conveniently completed to avoid the deviation of the spring parking cylinder 9 during detection and affect the stability of use. After the limit of the spring parking cylinder 9 is completed, when it is necessary to align the spring parking cylinder 9 with the installation box 6, the first servo motor 10 on the base 1 can be turned on, and the first servo motor 10 drives the first bidirectional threaded rod 11 to rotate. When the first bidirectional threaded rod 11 rotates, it can drive the moving blocks 12 on both sides to move at the same time. When the moving blocks 12 on both sides move outward, the moving blocks 12 can smoothly pull the connecting plate 14 down through the push rod 13, and the connecting plate 14 can smoothly adjust the use height of the connecting frame 15 to improve the stability of use, so as to adjust and align the use position of the spring parking cylinder 9.

[0057] The output end of the spring parking cylinder 9 is connected to the installation box 6. If the position of the installation box 6 needs to be moved and adjusted, the connecting bolt 3 can be rotated to loosen the installation box 6 on the guide wheel 5. After the installation box 6 is unobstructed, the installation box 6 can be pushed to move on the guide wheel 5 to adjust the use position of the installation box 6. At the same time, the guide wheel 5 can rotate smoothly on the connecting bolt 3 through the bearing 4. After the adjustment of the installation box 6 is completed, the connecting bolt 3 can be rotated to fix the installation box 6, and the installation box 6 on the lifting bracket 2 can be used smoothly. Then, the spring parking cylinder 9 is operated with air supply. When the spring parking cylinder 9 can operate normally, the pressure sensor 8 on the push rod 7 can be pushed for inspection. If the spring parking cylinder 9 is unqualified, damaged and cannot be used, the pressure sensor 8 will not be pressurized, and a smooth inspection is carried out. There are four connecting bolts 3 on the bracket 2 as the rotation center of the guide wheel 5. The depth of the thread of each connecting bolt 3 screwed into the bracket 2 can be adjusted to achieve accurate alignment between the center of the installation box 6 and the braking force output axis, thereby reducing the movement resistance of the mechanism caused by misalignment. In addition, the guide wheel 5 is equipped with a bearing 4, so that the guide wheel 5 and the installation box 6 mating part can use rolling friction instead of sliding friction, further reducing the movement resistance of the mechanism. Because of the effective adjustment capability, the overall size and shape and position tolerance machining accuracy of the test device are low. Through the above improvements, the internal resistance of the equipment is minimized, and the detection accuracy is significantly improved while completing the detection function.

[0058] After the test device has been working for a long time, the staff can pull the connecting ring 30 outwards. At this time, under the traction of the connecting ring 30, the traction rope 29 can be pulled to drive the clamping rods 28 on both sides to move toward the inside of the second connecting shaft 26 at the same time, until the clamping rods 28 move out of the clamping grooves 25 on both sides of the first connecting shaft 23. At this time, the second connecting shaft 26 can be easily disengaged from the positioning groove 24 on the first connecting shaft 23, completing the disassembly of the guide wheel 5. Similarly, after the guide wheel 5 is inspected, maintained or replaced, the staff can pull the connecting ring 30 on the second connecting shaft 26 outwards again and insert the second connecting shaft 26 into the After the guide wheel 5 is disassembled, the guide wheel 5 can be easily disassembled, inspected, maintained and replaced by the guide wheel 5, thereby effectively avoiding the problem of long-term use of the guide wheel 5 and causing wear and tear.

[0059] The motion guide part of the test device innovatively adopts the combination of adjustable guide wheel 5 and integral slide rail. The comprehensive test device is installed on the base 1 through the bracket 2, and the pressure sensor 8 for testing the braking force is also installed on the bracket 2. The main body of the motion part is an integral slide rail (the slot of the first connecting shaft 23), the right end of which is connected to the screw rod of the spring parking cylinder outputting the braking force, and the left end is equipped with a top rod 7 for transmitting the braking force to the pressure sensor 8. Four adjustable guide wheels 5 (two on each side) are installed on the bracket 2, and the connection between the bracket 2 and the slide rail is realized through the guide grooves on both sides of the slide rail. The bracket 2 has four rotating shafts installed with threads as the rotation center of the adjustable guide wheel. By adjusting the depth of the threads of a single rotating shaft screwed into the bracket 2, the slide rail can be moved horizontally relative to the spring parking cylinder mounting seat, and even rotated to a certain extent, so as to achieve accurate alignment of the slide rail center with the braking force output axis, and reduce the mechanism movement resistance caused by misalignment. The adjustable guide wheel is equipped with a cylindrical roller bearing, so that the guide wheel and the slide rail can use rolling friction instead of sliding friction, further reducing the movement resistance of the mechanism. Because of the effective adjustment capability, the overall size and shape and position tolerance machining accuracy of the test device are low. Through the above improvements, the internal resistance of the equipment is minimized, and the detection accuracy is significantly improved while completing the detection function.

[0060] When the brake body is tested through the installation box, the brake body can be connected to the installation box. If the installation box needs to be moved, the connecting bolts can be loosened to push the installation box to move on the guide wheel. The guide wheel can rotate smoothly on the connecting bolts through the bearing. After adjusting the installation box, the connecting bolts can be rotated to fix the installation box. When the brake body is running, the brake body can be smoothly tested by the pressure sensor on the top rod to check whether the brake body can be used and operated normally.

[0061] When the brake body needs to be limited and fixed by the setting of the connecting frame, the second servo motor can be turned on to drive the second bidirectional threaded rod to rotate. When the second bidirectional threaded rod rotates, the transmission belt can be used to smoothly drive the second bidirectional threaded rods on both sides to rotate. When the second bidirectional threaded rod rotates, it can drive the connecting blocks on both sides to move smoothly. When the connecting blocks move, they can drive the clamping plates to move at the same time. The clamping plates on both sides can clamp and limit the brake body smoothly to avoid the impact of offset on the detection stability. Through the rotation of the first bidirectional threaded rod, the push rod can be driven to move through the moving block, and the push rod can pull the connecting plate to drive the connecting frame to move, which is convenient for adjusting the use position of the connecting frame for its inspection.

[0062] By cooperating with the provided clamping rod and the clamping slot, the second connecting shaft can be conveniently and stably engaged, installed, disassembled and separated, and the disassembly, inspection, maintenance and replacement of the guide wheel can be conveniently completed, thereby effectively avoiding the problem of wear of the guide wheel after long-term use, resulting in reduced subsequent detection accuracy, and increasing the diversity of use and detection accuracy of the test device.

[0063] The adjustable guide wheel of the present invention is internally equipped with a cylindrical roller bearing, so that the guide wheel and the slide rail matching part can use rolling friction instead of sliding friction, further reducing the movement resistance of the mechanism. At the same time, it has sufficient strength to withstand the reaction force caused by the braking force test.

[0064] The present invention can conveniently and stably engage and install and disassemble the second connecting shaft through the cooperation of the arranged clamping rod and the clamping groove, thereby conveniently completing the disassembly, inspection, maintenance and replacement of the guide wheel, thereby effectively avoiding the problem of wear of the guide wheel due to long-term use, resulting in reduced subsequent detection accuracy, and increasing the use diversity and detection accuracy of the test device.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A test device for a locomotive spring parking cylinder, characterized in that: It includes a base, a bracket, a connecting frame, a spring parking cylinder installation limit mechanism and a testing mechanism, the bracket is connected to the base, the spring parking cylinder installation limit mechanism is arranged in the connecting frame, the testing mechanism is installed on the bracket, the testing mechanism includes a push rod, and a pressure sensor is installed on the push rod. The connecting frame is connected to the base in an adjustable height. During the test, the output end screw of the spring parking cylinder can be connected with the push rod. After the output end screw of the spring parking cylinder is actuated, the spring parking cylinder is tested based on the indication of the pressure sensor.

2. The test device for locomotive spring parking cylinder according to claim 1, characterized in that: The testing mechanism also includes a first connecting shaft, a second connecting shaft, a bearing, a guide wheel, an installation box and connecting bolts. A plurality of connecting bolts are installed on the bracket, and the ends of the connecting bolts are fixedly connected to the first connecting shaft. A positioning groove is provided inside the other end of the first connecting shaft, and the second connecting shaft is limitedly slidably connected in the positioning groove. A bearing is installed on the second connecting shaft, and a guide wheel is fixedly connected to the bearing. The guide wheel is limitedly slidably connected to the installation box, and the top rod is installed on the installation box.

3. The test device for locomotive spring parking cylinder according to claim 1, characterized in that: The height of the connecting frame is adjustably connected to the base based on a height adjustment device, and the height adjustment device includes a first servo motor, a first bidirectional threaded rod, a moving block, a push rod and a connecting plate. The first servo motor is arranged on the base, and the output shaft of the first servo motor is connected to the first bidirectional threaded rod. A plurality of moving blocks are connected to the first bidirectional threaded rod, and the upper end of each moving block is rotatably connected to a push rod, and the other end of the push rod is rotatably connected to the connecting plate, and the connecting plate is connected to the connecting frame.

4. The test device for locomotive spring parking cylinder according to claim 1, characterized in that: The connecting frame is sleeved with a protective shell on the outside.

5. The test device for the spring parking cylinder of a locomotive according to claim 3, characterized in that: The bottom of the moving block is in contact with the inner bottom end surface of the base.

6. The test device for the spring parking cylinder of a locomotive according to claim 1, characterized in that: The spring parking cylinder installation limit mechanism includes a vertical clamping mechanism and a horizontal clamping mechanism. The vertical clamping mechanism includes a second servo motor, a second bidirectional threaded rod, a transmission belt, a connecting block and a clamping plate. The second servo motor is installed in a connecting frame. The output shaft of the second servo motor is connected to the second bidirectional threaded rod. Another second bidirectional threaded rod parallel to the second bidirectional threaded rod is arranged on the other side of the connecting frame. The transmission belt is arranged on the second bidirectional threaded rod. Two connecting blocks are arranged on each of the second bidirectional threaded rods. The two connecting blocks on the same horizontal line are connected to the corresponding clamping plates. The two connecting blocks on the same horizontal line are symmetrically distributed on the left and right sides of the second bidirectional threaded rod. The vertical clamping of the spring parking cylinder is completed by the arranged clamping plate; the horizontal clamping mechanism includes a double-headed motor, a transmission threaded rod, a horizontal plate and a baffle. The double-headed motor is arranged in the clamping plate. The transmission threaded rods are arranged on both sides of the double-headed motor. The transmission threaded rods are connected to the horizontal plate, and the baffle is connected to the horizontal plate. The horizontal clamping of the spring parking cylinder is completed by the baffle.

7. The test device for the spring parking cylinder of a locomotive according to claim 6, characterized in that: A rubber pad is installed on the clamping plate.

8. The test device for a locomotive spring parking cylinder according to claim 2, characterized in that: A slot is provided in the first connecting shaft, a reset spring is fixedly connected in the second connecting shaft, the other end of the reset spring is fixedly connected to a clamping rod, the clamping rod is limitedly slidably connected in the second connecting shaft, the end of the clamping rod is snap-connected in the slot, a traction rope is fixedly connected to the clamping rod, the traction rope is limitedly slidably connected in the second connecting shaft, and the end of the traction rope is fixedly connected to a connecting ring.

9. A method for using the test device for a locomotive spring parking cylinder according to any one of claims 1 to 8, characterized in that: The steps include: Place the locomotive spring parking cylinder on the clamping plate, and complete the clamping and limiting of the locomotive spring parking cylinder by installing the limiting mechanism of the spring parking cylinder; By controlling the height adjustment device, the spring parking cylinder and the mounting box are aligned; Push the installation box to move on the guide wheel to adjust the use position of the installation box. After the installation box is adjusted, turn the connecting bolts to fix the installation box; By supplying air to the locomotive's spring parking cylinder, when the spring parking cylinder can operate normally, the pressure sensor on the push rod can be pushed for inspection. If the spring parking cylinder is unqualified and damaged and cannot be used, the pressure sensor will not be pressurized and a smooth inspection can be performed.

10. The method according to claim 9, characterized in that During the test, when the test device has been working for a long time, the staff completes the disassembly of the guide wheel by pulling the connecting ring outward; after the guide wheel is inspected, maintained or replaced, the staff pulls the connecting ring on the second connecting shaft outward again, and inserts the second connecting shaft into the positioning groove on the first connecting shaft to complete the snap-on installation of the guide wheel.

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