An overspeed braking detection fixture

Abstract

This utility model provides an overspeed braking detection fixture, comprising: a drive device connected to a centrifugal trigger for driving the centrifugal trigger to rotate and trigger an action; a transmission device positioned between the centrifugal trigger and the braking assembly, receiving the trigger action and transmitting it to the braking assembly to activate the brake; and a hydraulic power system connected to the braking assembly to provide hydraulic pressure to the braking assembly. This overspeed braking detection fixture solves the technical problem in related technologies where overspeed braking devices for monorail cranes can only be tested on the entire vehicle, resulting in low testing efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of overspeed braking testing fixtures for monorail cranes, specifically to an overspeed braking detection fixture. Background Technology

[0002] The explosion-proof diesel engine monorail locomotive for coal mines is an auxiliary transportation device used underground, and stable, safe, and reliable operation is of paramount importance. Therefore, the system is equipped with numerous safety measures, such as overspeed braking. This is because, during operation, especially when descending slopes under load, the locomotive may experience overspeeding or stalling. If obstacles are encountered in the tunnel, the locomotive may not be able to brake in time, with potentially serious consequences. To address this, the locomotive has been equipped with a braking protection device combining centrifugal overspeed braking and hydraulic valve return oil. Originally, this device was installed on the locomotive for whole-vehicle testing, which was inefficient. With the increasing number of products produced by the company, online debugging can no longer meet production demands.

[0003] Therefore, under the premise of relevant technical conditions, how to conduct faster and more accurate simulation tests of the overspeed braking device of a monorail is a technical problem that needs to be solved by those skilled in the art.

[0004] Therefore, existing technologies need further development. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and provide an overspeed braking detection fixture to solve the technical problem that the overspeed braking device of monorail crane locomotive can only be tested on the whole vehicle, resulting in low testing efficiency.

[0006] To achieve the above technical objectives, the present invention adopts the following technical solution: It provides an overspeed braking detection fixture, comprising: a driving device connected to a centrifugal trigger, the driving device driving the centrifugal trigger to rotate, causing the centrifugal trigger to generate a triggering action; a transmission device disposed between the centrifugal trigger and the braking assembly, the transmission device receiving the triggering action of the centrifugal trigger and transmitting the triggering action to the braking assembly to activate the brake; and a hydraulic power system connected to the braking assembly, the hydraulic power system providing hydraulic pressure to the braking assembly.

[0007] Furthermore, the hydraulic power system includes an oil tank and an oil pump connected to the oil tank. The oil tank's return port and outlet port are respectively connected to the brake hydraulic cylinder in the brake assembly. The oil pump delivers hydraulic oil from the oil tank to the brake hydraulic cylinder.

[0008] Furthermore, a directional valve in the braking assembly is provided between the oil tank and the brake hydraulic cylinder. The operating handle of the directional valve can abut against the transmission device to switch the directional valve between a first connected state and a second connected state. When the operating handle of the directional valve abuts against the transmission device, the directional valve is in the first connected state, and the rod chamber of the brake hydraulic cylinder is connected to the oil outlet of the oil tank. When the centrifugal trigger generates a triggering action and the operating handle of the directional valve is disconnected from the transmission device, the directional valve is in the second connected state, and the rod chamber of the brake hydraulic cylinder is connected to the oil return port of the oil tank, and the braking assembly activates the brake.

[0009] Furthermore, the drive device includes a hydraulic motor, the output shaft of which is connected to a centrifugal trigger, and the hydraulic motor is connected to the oil return port and oil outlet of the oil tank respectively. The oil pump delivers the hydraulic oil in the oil tank to the hydraulic motor.

[0010] Furthermore, the overspeed braking detection fixture includes a speed measuring device, which includes: a transmission assembly, which includes a first pulley and a second pulley, the first pulley being drivenly connected to the output shaft of the drive device, and the second pulley being drivenly connected to the first pulley; a speed measuring shaft, on which the second pulley is mounted, and a detection part protruding from the speed measuring shaft; and a detection sensor, which includes a proximity switch, and the proximity switch is correspondingly arranged with the detection part arranged on the speed measuring shaft.

[0011] Furthermore, the overspeed braking detection fixture includes a speed measuring device, which includes: a transmission assembly, which includes a first pulley and a second pulley, the first pulley being drivenly connected to the output shaft of the drive device, and the second pulley being drivenly connected to the first pulley; a speed measuring shaft, on which the second pulley is mounted; and a detection sensor, which includes a rotary encoder, which is mounted on the speed measuring shaft.

[0012] Furthermore, the overspeed braking detection fixture includes a display instrument, which is connected to the detection sensor signal and is used to display the rotational speed of the centrifugal trigger.

[0013] Furthermore, the overspeed braking detection fixture includes a mounting base plate, on which a drive unit, a transmission unit, and a reversing valve are mounted.

[0014] Furthermore, the overspeed braking testing fixture includes a mounting bracket for fixing the reversing valve in the braking assembly, and the mounting bracket is fixedly mounted on the mounting base plate.

[0015] Furthermore, the overspeed braking detection fixture includes a mounting plate for fixing the centrifugal trigger. The mounting plate is connected to the output shaft of the drive device, and a retaining edge is provided at the edge of the mounting plate, which abuts against the outer peripheral surface of the centrifugal trigger.

[0016] Beneficial effects:

[0017] 1. By integrating the drive unit, transmission unit, and hydraulic power system, the close cooperation between the components ensures that the entire process from overspeed triggering to braking triggering and then to actual braking can be completed quickly and accurately. The overspeed braking detection fixture can quickly, efficiently, and reliably simulate the actual running state of the locomotive, detect the performance of the tested component, improve production efficiency, reduce testing costs, and solve the technical problem that the overspeed braking device of monorail locomotive can only be tested on the whole vehicle, resulting in low testing efficiency.

[0018] 2. The overspeed braking detection fixture in this embodiment, based on hydraulic transmission control technology and electrical control technology, uses a hydraulic motor to simulate the rotation of the overspeed braking device when the locomotive is moving. The power unit controls and drives the hydraulic motor, which in turn drives the centrifugal trigger to rotate, simulating a scenario where the locomotive stalls. A reversing valve is connected between the oil tank and the brake hydraulic cylinder for return oil braking of the brake hydraulic cylinder. A pulley drives the speed measuring shaft to rotate. The speed of the centrifugal trigger is calculated by a proximity switch that detects the speed measuring shaft's rotation, and the speed is displayed in real time on a display instrument. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overspeed braking detection fixture used in this embodiment of the utility model;

[0020] Figure 2 This is a front view of the mounting base plate of the overspeed braking detection fixture used in this embodiment of the utility model;

[0021] Figure 3 This is a rear view of the mounting base plate of the overspeed braking detection fixture used in this embodiment of the utility model;

[0022] Figure 4 This is a top view of the mounting base plate of the overspeed braking detection fixture used in this embodiment of the utility model;

[0023] Figure 5 This is a side view of the mounting base plate of the overspeed braking detection fixture used in this embodiment of the utility model;

[0024] Figure 6 This is a schematic diagram of the brake hydraulic cylinder of the overspeed braking detection fixture used in this embodiment of the utility model;

[0025] Figure 7 This is a schematic diagram of the internal structure of the centrifugal trigger of the overspeed braking detection fixture used in this embodiment of the utility model;

[0026] Figure 8 This is the book Figure 7 AA section view in the middle;

[0027] Figure 9This is a schematic diagram of the hydraulic principle of the overspeed braking detection fixture used in this embodiment of the utility model;

[0028] Figure 10 This is a schematic diagram of the local hydraulic principle of the overspeed braking detection tool used in this embodiment of the utility model when it is in a braking state;

[0029] Figure 11 This is a schematic diagram of the local hydraulic principle of the overspeed braking detection fixture used in this embodiment of the utility model when the brake is released.

[0030] The above figures include the following reference numerals:

[0031] 10. Centrifugal trigger; 102. Moving rod; 103. Left swing block; 104. Right swing block; 105. Housing; 106. Cover; 20. Brake hydraulic cylinder; 30. Reversing valve; 301. Operating handle; 302. Roller; 40. Brake spring;

[0032] 1. Drive unit; 11. Axle; 2. Transmission device; 3. Hydraulic power system; 31. Oil tank; 311. Oil return port; 312. Oil outlet; 32. Oil pump; 33. Motor; 34. Oil return filter; 35. Air filter; 36. Overflow valve; 37. Solenoid directional valve; 38. Liquid level relay; 39. Connecting valve; 4. Speed ​​measuring device; 41. First pulley; 42. Second pulley; 43. Speed ​​measuring shaft; 44. Detection section; 45. Detection sensor; 5. Display instrument; 6. Mounting base plate; 7. Fixing bracket; 8. Mounting plate; 81. Edge retainer; 9. Test bench. Detailed Implementation

[0033] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0034] According to an embodiment of this utility model, an overspeed braking detection fixture is provided. Please refer to [link / reference]. Figures 1 to 11It includes: a drive device 1, which is connected to the centrifugal trigger 10 and drives the centrifugal trigger 10 to rotate, causing the centrifugal trigger 10 to trigger; a transmission device 2, which is located between the centrifugal trigger 10 and the braking assembly, receives the trigger action of the centrifugal trigger 10 and transmits the trigger action to the braking assembly to activate the brake; and a hydraulic power system 3, which is connected to the braking assembly and provides hydraulic pressure to the braking assembly.

[0035] Specifically, the drive unit 1 is directly or indirectly connected to the centrifugal trigger 10 via its output shaft. When the drive unit 1 is started, the power it provides causes the centrifugal trigger 10 to start rotating. As the rotational speed increases, the centrifugal force gradually increases. When the rotational speed reaches or exceeds the preset value, the internal mechanical structure of the centrifugal trigger 10 will displace or deform, thereby causing the centrifugal trigger 10 to trigger. This ensures that the centrifugal trigger 10 can trigger the braking system at the set speed, simulating the scenario of overspeed triggering when the locomotive stalls, without relying on the entire vehicle for speed simulation, greatly improving the flexibility and efficiency of the test.

[0036] Specifically, the transmission device 2 is positioned between the centrifugal trigger 10 and the braking assembly. It is responsible for receiving the trigger signal from the centrifugal trigger 10 and transmitting it to the braking assembly to activate the brakes. In this embodiment, when the centrifugal trigger 10 is triggered due to reaching a set speed, the trigger signal is first captured by the transmission device 2 and converted into a form suitable for the braking assembly to recognize, further triggering the braking assembly to activate the brakes. This achieves a rapid response from overspeed triggering to braking triggering, simulating the actual braking system of a locomotive.

[0037] In some embodiments, the transmission device 2 includes a fork, one end of which is corresponding to the moving rod of the centrifugal trigger 10, and the other end of which is corresponding to the operating handle 301. The fork is rotatably configured and is used to trigger the braking assembly to activate the braking.

[0038] Specifically, the hydraulic power system 3 is connected to the braking assembly and is mainly used to provide the required hydraulic pressure to the braking assembly. When braking is required, the pressure in the braking hydraulic cylinder is adjusted according to the trigger action transmitted by the transmission device 2, thereby driving the braking mechanism to perform the braking operation.

[0039] By integrating the drive unit 1, the transmission unit 2, and the hydraulic power system 3, the close cooperation between the components ensures that the entire process from overspeed triggering to braking triggering and then to actual braking can be completed quickly and accurately. The overspeed braking detection fixture can quickly, efficiently, and reliably simulate the actual running state of the locomotive, detect the performance of the tested component, improve production efficiency, reduce testing costs, and solve the technical problem that the overspeed braking device of the monorail locomotive can only be tested on the whole vehicle, resulting in low testing efficiency.

[0040] The following describes the specific structure of a centrifugal trigger suitable for testing with the overspeed braking detection fixture in this application. The centrifugal trigger consists of a moving rod 102, a left swing block 103, a right swing block 104, a housing 105, and a centrifugal trigger cover 106. When the wheel axle 11 rotates, it drives the mounting plate 8 to rotate. When the speed reaches a certain value, the left swing block 103 and the right swing block 104 rotate under the action of centrifugal force, pressing down on the moving rod 102. The moving rod 102 will extend out of the housing 105 and touch the shift fork, causing the end of the shift fork to disengage from the roller 302 of the reversing valve, thereby causing the reversing valve 30 to switch.

[0041] Specifically, the sling block in the centrifugal trigger 10, upon reaching a certain rotational speed, throws out the moving rod 102, which then disengages from the roller 302 of the reversing valve 30 via a shift fork. Hydraulic oil in the rod chamber of the brake hydraulic cylinder 20 returns to the oil tank 31 through the reversing valve 30, and the force of the brake spring 40 extends the piston rod of the brake hydraulic cylinder, thereby braking the locomotive. The use of this testing method and device improves the efficiency of locomotive factory inspection.

[0042] In the overspeed braking detection fixture of this embodiment, see... Figure 9 The hydraulic power system 3 includes an oil tank 31 and an oil pump 32 connected to the oil tank 31. The oil return port 311 and the oil outlet 312 of the oil tank 31 are respectively connected to the brake hydraulic cylinder 20 in the brake assembly. The oil pump 32 delivers hydraulic oil from the oil tank 31 to the brake hydraulic cylinder 20. By providing hydraulic oil to the brake hydraulic cylinder 20 through the oil tank 31, the pressure in the rod chamber of the brake hydraulic cylinder 20 can be changed by controlling the return oil, thereby controlling the extension of the piston rod of the brake hydraulic cylinder 20 and thus braking the locomotive.

[0043] See Figure 6 The braking assembly also includes a brake hydraulic cylinder 20 and a brake spring 40 for braking the drive unit. When hydraulic oil enters the rod chamber of the brake hydraulic cylinder 20, the piston rod retracts, compressing the brake spring 40 and opening the brake. The hydraulic oil in the rod chamber of the brake hydraulic cylinder 20 is depressurized and returned to the oil through the reversing valve 30, the brake spring 40 is released, and the brake hydraulic cylinder 20 extends its piston rod under the action of the brake spring 40, thus braking the locomotive.

[0044] In the overspeed braking detection fixture of this embodiment, see... Figure 2 and Figure 9 A reversing valve 30 in the braking assembly is provided between the oil tank 31 and the brake hydraulic cylinder 20. The operating handle 301 of the reversing valve 30 can abut against the transmission device 2 to switch the reversing valve 30 between a first connected state and a second connected state. When the operating handle 301 of the reversing valve 30 abuts against the transmission device 2, the reversing valve 30 is in the first connected state, and the rod chamber of the brake hydraulic cylinder 20 is connected to the oil outlet 312 of the oil tank 31. The centrifugal trigger 10 generates a trigger action, the operating handle 301 of the reversing valve 30 is disconnected from the transmission device 2, the reversing valve 30 is in the second connected state, the rod chamber of the brake hydraulic cylinder 20 is connected to the oil return port 311 of the oil tank 31, and the braking assembly activates the brake. Specifically, the reversing valve 30 is connected between the oil tank 31 and the brake hydraulic cylinder 20, and a roller 302 is installed on the operating handle 301 of the reversing valve 30 for the return oil braking of the brake hydraulic cylinder.

[0045] Specifically, the overspeed braking detection fixture includes a swing frame, which can provide some support for the centrifugal trigger 10. One end of the swing frame is fitted onto the axle 11 at the center hole, and the other end is coaxially mounted with a shift fork at the center hole. One end of the shift fork contacts the roller 302 of the reversing valve 30. When the roller 302 of the reversing valve 30 is pressed against the roller 302, the reversing valve 30 is in the first connected state, and the hydraulic oil enters the rod chamber of the brake hydraulic cylinder 20.

[0046] Specifically, one end of the shift fork contacts the roller 302, pressing against the roller 302 to reverse the direction of the reversing valve, switching the reversing valve to the first connected state. The rod chamber of the brake hydraulic cylinder 20 is connected to the oil outlet 312 of the oil tank 31, allowing hydraulic oil to freely enter and exit the hydraulic cylinder. When the hydraulic oil enters the rod chamber of the brake hydraulic cylinder 20, the piston rod retracts, compressing the brake spring 40. At this time, the brake assembly is activated, ready to brake at any time.

[0047] When the centrifugal trigger 10 triggers, the lever 102 extends out of the housing and touches the shift fork, causing the shift fork to disengage from the reversing valve roller 302. The operating handle 301 of the reversing valve 30 is disconnected from the transmission device 2, thereby causing the reversing valve 30 to reverse and switch to the second connected state. The hydraulic oil in the rod chamber of the brake hydraulic cylinder 20 is depressurized and returned to the oil through the reversing valve 30. The brake spring 40 is released, and the brake hydraulic cylinder piston rod extends under the action of the brake spring, thereby braking the locomotive and ensuring that the braking system can respond quickly and accurately when an overspeed is detected.

[0048] In the overspeed braking detection fixture of this embodiment, see... Figure 3 and Figure 9The drive unit 1 includes a hydraulic motor, the output shaft of which is driven by the centrifugal trigger 10. The hydraulic motor is connected to the return port 311 and the outlet port 312 of the oil tank 31. The oil pump 32 delivers hydraulic oil from the oil tank 31 to the hydraulic motor. With the above configuration, the oil tank 31 provides hydraulic oil to the brake hydraulic cylinder 20, provides power for the rotation of the hydraulic motor, and the hydraulic motor drives the centrifugal trigger 10 to rotate.

[0049] The hydraulic principle of hydraulic power system 3 is as follows, see below. Figure 9 The motor 33 drives the oil pump 32 to draw hydraulic oil from the oil tank 31. The hydraulic oil discharged from the outlet of the oil pump 32 passes through the relief valve 36 to stabilize the system pressure, and excess hydraulic oil flows back to the oil tank 31 through the relief valve 36. The hydraulic oil enters the hydraulic motor through a set of solenoid directional valves 37, and enters the brake hydraulic cylinder 20 through the connecting valve 39. The rod chamber of the brake hydraulic cylinder 20 is connected to the connecting valve 39 by a directional valve 30. The level relay 38 on the oil tank is used to detect the hydraulic oil level in the oil tank 31. When the level is lower than the set value, the motor 33 is controlled to stop rotating, and the hydraulic oil pump 32 stops drawing oil from the oil tank 31 to prevent the oil pump 32 from being damaged by cavitation. The system's return oil enters the oil tank through the return oil filter 34, effectively filtering impurities in the hydraulic oil and protecting the oil pump 32. The air filter 35 is used to filter the hydraulic oil when adding hydraulic oil to the oil tank. It also ensures atmospheric pressure balance in the oil tank caused by changes in the hydraulic oil level during system operation by communicating with the atmosphere, thus preventing cavitation damage to the oil pump.

[0050] Specifically, see Figure 11 When the directional valve switches to the first connected state, hydraulic oil reaches the directional valve 30 through the connecting valve 39, and then enters the rod chamber of the brake hydraulic cylinder 20. At this time, the brake assembly is in the released state; see also Figure 10 When the directional valve 30 switches to the second connected state, the hydraulic oil in the rod chamber of the brake hydraulic cylinder 20 is connected to the return oil line through the directional valve 30, and the hydraulic oil in the rod chamber returns to the oil tank 31. At this time, the brake assembly is in the braking state.

[0051] In the overspeed braking detection fixture of this embodiment, see... Figure 2-4The overspeed braking detection fixture includes a speed measuring device 4, which comprises: a transmission assembly including a first pulley 41 and a second pulley 42, the first pulley 41 being drivenly connected to the output shaft of the drive device 1, and the second pulley 42 being connected to the first pulley 41 via a belt drive; a speed measuring shaft 43 on which the second pulley 42 is mounted, and a detection part 44 protruding from the speed measuring shaft 43; and a detection sensor 45 including a proximity switch, which is correspondingly configured with the detection part 44 on the speed measuring shaft 43. Specifically, the first pulley 41 and the second pulley 42 are connected via a belt drive. The speed measuring device 4 calculates the rotational speed of the centrifugal trigger 10 based on the detection result of the proximity switch and tests whether the centrifugal trigger 10 can be triggered after the rotational speed reaches a set value.

[0052] Specifically, a protruding protrusion (i.e., detection part 44) is provided on the end face of the speed measuring shaft. A proximity switch is provided corresponding to the protrusion. When the speed measuring shaft 43 rotates the proximity switch, the proximity switch can sense the protruding detection part 44 on the speed measuring shaft. The rotational speed of the centrifugal trigger 10 can be calculated based on the sensing result of the proximity switch.

[0053] In the overspeed braking detection fixture of this embodiment, see... Figure 2 The overspeed braking detection fixture includes a speed measuring device 4, which comprises: a transmission assembly including a first pulley 41 and a second pulley 42, the first pulley 41 being drivenly connected to the output shaft of the drive device 1, and the second pulley 42 being drivenly connected to the first pulley 41; a speed measuring shaft 43 on which the second pulley 42 is mounted; and a detection sensor 45 including a rotary encoder mounted on the speed measuring shaft 43. In some embodiments, an encoder may also be used to obtain the rotational speed of the centrifugal trigger 10.

[0054] In the overspeed braking detection fixture of this embodiment, see... Figure 2 The overspeed braking detection fixture includes a display instrument 5, which is connected to the detection sensor 45. The display instrument 5 is used to display the rotational speed of the centrifugal trigger 10. In this way, the speed of the centrifugal trigger obtained by the speed measuring device 4 is displayed on the display instrument in real time.

[0055] In the overspeed braking detection fixture of this embodiment, see... Figure 2 The overspeed braking detection fixture includes a mounting base plate 6, on which a drive device 1, a transmission device 2, and a reversing valve 30 are mounted.

[0056] In some embodiments, the mounting base plate 6 is used to mount structures such as hydraulic motors, centrifugal trigger assemblies, reversing valve assemblies, shift fork assemblies, display instruments, proximity switches, first pulley 41, second pulley 42, and belts.

[0057] In the overspeed braking detection fixture of this embodiment, see... Figure 2 and Figure 4 The overspeed braking detection fixture includes a fixing frame 7, which is used to fix the reversing valve 30 in the braking assembly. The fixing frame 7 is fixedly mounted on the mounting base plate 6.

[0058] In the overspeed braking detection fixture of this embodiment, see... Figure 2 and Figure 4 , Figure 8 The overspeed braking testing fixture includes a mounting plate 8, which is used to fix the centrifugal trigger 10. The mounting plate 8 is connected to the output shaft of the drive device 1. A retaining edge 81 is provided at the edge of the mounting plate 8, which abuts against the outer peripheral surface of the centrifugal trigger 10. Specifically, the mounting plate 8 has a disc-shaped structure. The mounting plate 8 is directly connected to the output shaft of the drive device 1 and can rotate coaxially with the output shaft. The centrifugal trigger 10 is mounted on the mounting plate 8 with bolts and can be easily removed from the mounting plate 8, thus facilitating the testing of different centrifugal triggers 10. The retaining edge 81 is for additional safety protection. The retaining edge 81 is in close contact with the outer peripheral surface of the centrifugal trigger 10, effectively preventing radial displacement or accidental detachment of the centrifugal trigger that may occur during high-speed rotation.

[0059] The overspeed braking detection fixture includes a wheel axle 11, one end of which is fixedly connected to the output shaft of the first drive device 1, and the other end of which is equipped with a mounting plate 8.

[0060] In some embodiments, the overspeed braking detection fixture includes a test bench 9, on which a mounting base plate 6 is mounted, the extension direction of the mounting base plate 6 being perpendicular to the test bench 9.

[0061] In this application, the centrifugal trigger 10 is the first test component, and the reversing valve 30 is the second test component. The test is conducted to determine whether the centrifugal trigger 10 and the reversing valve 30 can complete the triggering and reversing actions when the rotational speed reaches the set value.

[0062] This embodiment of the overspeed braking detection fixture, based on hydraulic transmission control technology and electrical control technology, uses a hydraulic motor to simulate the rotation of the overspeed braking device when a locomotive is running. The power unit controls and drives the hydraulic motor, which in turn drives the centrifugal trigger 10 to rotate, simulating a scenario where the locomotive stalls. A reversing valve 30 is connected between the oil tank 31 and the brake hydraulic cylinder 20 for return oil braking of the brake hydraulic cylinder. A pulley drives the speed measuring shaft 43 to rotate. The speed of the centrifugal trigger 10 is calculated by a proximity switch that detects the speed measuring shaft 44 via a detection unit 44 on the speed measuring shaft, and the speed is displayed in real time on the display instrument 5. This testing method and fixture can quickly, efficiently, and reliably simulate the actual operating state of a locomotive, detect the performance of the tested component, improve production efficiency, and reduce the costs associated with going online.

[0063] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0064] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0065] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0066] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0067] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. An overspeed braking detection fixture, characterized in that, include: A driving device (1) is connected to a centrifugal trigger (10) for driving the centrifugal trigger (10) to rotate, so that the centrifugal trigger (10) generates a triggering action. The transmission device (2) is disposed between the centrifugal trigger (10) and the braking assembly. The transmission device (2) receives the triggering action of the centrifugal trigger (10) and transmits the triggering action to the braking assembly to activate the braking. A hydraulic power system (3) is connected to the braking assembly and is used to provide hydraulic pressure to the braking assembly.

2. The overspeed braking detection fixture according to claim 1, characterized in that, The hydraulic power system (3) includes an oil tank (31) and an oil pump (32) connected to the oil tank (31). The oil return port (311) and oil outlet (312) of the oil tank (31) are respectively connected to the brake hydraulic cylinder (20) in the brake assembly. The oil pump (32) delivers the hydraulic oil in the oil tank (31) to the brake hydraulic cylinder (20).

3. The overspeed braking detection fixture according to claim 2, characterized in that, A reversing valve (30) in the braking assembly is provided between the oil tank (31) and the brake hydraulic cylinder (20). The operating handle (301) of the reversing valve (30) can abut against the transmission device (2) so that the reversing valve (30) can switch between a first connected state and a second connected state. When the operating handle (301) of the reversing valve (30) abuts against the transmission device (2), the reversing valve (30) is in the first connected state, and the rod chamber of the brake hydraulic cylinder (20) and the oil outlet (312) of the oil tank (31) are connected. When the centrifugal trigger (10) generates a trigger action, and the operating handle (301) of the reversing valve (30) is disconnected from the transmission device (2), the reversing valve (30) is in the second connected state, the rod chamber of the brake hydraulic cylinder (20) is connected to the oil return port (311) of the oil tank (31), and the brake assembly starts braking.

4. The overspeed braking detection fixture according to claim 2, characterized in that, The drive device (1) includes a hydraulic motor, the output shaft of which is driven and connected to the centrifugal trigger (10). The hydraulic motor is connected to the oil return port (311) and oil outlet port (312) of the oil tank (31) respectively. The oil pump (32) delivers the hydraulic oil in the oil tank (31) to the hydraulic motor.

5. The overspeed braking detection fixture according to claim 1, characterized in that, The overspeed braking detection fixture includes a speed measuring device (4), which includes: The transmission assembly includes a first pulley (41) and a second pulley (42), wherein the first pulley (41) is drivenly connected to the output shaft of the drive device (1), and the second pulley (42) is drivenly connected to the first pulley (41). Speed ​​measuring shaft (43), on which a second pulley (42) is mounted, and a detection part (44) protrudes from the speed measuring shaft (43). The detection sensor (45) includes a proximity switch, which is correspondingly disposed with the detection unit (44) disposed on the speed measuring shaft (43).

6. The overspeed braking detection fixture according to claim 1, characterized in that, The overspeed braking detection fixture includes a speed measuring device (4), which includes: The transmission assembly includes a first pulley (41) and a second pulley (42), wherein the first pulley (41) is drivenly connected to the output shaft of the drive device (1), and the second pulley (42) is drivenly connected to the first pulley (41). Speed ​​measuring shaft (43), on which a second pulley (42) is mounted; The detection sensor (45) includes a rotary encoder, which is mounted on the speed measuring shaft (43).

7. The overspeed braking detection fixture according to claim 5 or 6, characterized in that, The overspeed braking detection fixture includes a display instrument (5), which is connected to the detection sensor (45) and is used to display the rotational speed of the centrifugal trigger (10).

8. The overspeed braking detection fixture according to claim 3, characterized in that, The overspeed braking detection fixture includes a mounting base plate (6), on which the drive device (1), the transmission device (2), and the reversing valve (30) are mounted.

9. The overspeed braking detection fixture according to claim 8, characterized in that, The overspeed braking detection fixture includes a fixing frame (7), which is used to fix the reversing valve (30) in the braking assembly. The fixing frame (7) is fixedly mounted on the mounting base plate (6).

10. The overspeed braking detection fixture according to claim 1, characterized in that, The overspeed braking detection fixture includes a mounting plate (8), which is used to fix the centrifugal trigger (10). The mounting plate (8) is connected to the output shaft of the drive device (1). A retaining edge (81) is provided at the edge of the mounting plate (8), and the retaining edge (81) abuts against the outer peripheral surface of the centrifugal trigger (10).

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