An urban rail wheelset running-in test bench

Abstract

The present invention belongs to the field of rail transit technology, and in particular, relates to a running-in test bench for urban rail wheelsets. The hydraulic support rods are symmetrically distributed on both sides of a through-type strip steel rail in a group of two, and the top ends of the two groups of hydraulic support rods on the same side are connected to axle box support fixtures; a support truss is erected on the upper end of the outer side of the hydraulic support rod, and a pair of through-type operating load loading pumps are symmetrically arranged on the top plate of the support truss. The wheelset drive assembly is pushed to the upper end of the hydraulic support rod along the through-type strip steel rail, and the axle box support fixture and the axle box body sleeved at both ends of the wheelset drive assembly are kept clamped and fixed by the synchronous lifting of the four groups of hydraulic support rods. It replaces the overhead crane with a track, which is convenient for manually pushing the wheelset drive, reducing the process of the traditional running-in test bench requiring an overhead crane to lift the wheelset drive, thereby reducing the lifting time and lifting safety risks of the wheelset drive; in addition, the operating load is added to simulate the real state, and the test accuracy is higher.

Description

Technical Field

[0001] The invention belongs to the technical field of rail transportation, and in particular relates to an urban rail wheelset running-in test bench. Background Art

[0002] With the expansion of the urban rail transit industry over the years, the subway, as an important part of the urban transportation network, has become an indispensable part of urban residents' travel. The urban rail wheelset drive is a key component of subway vehicles, and its reliability is directly related to the safety and comfort of subway vehicles.

[0003] As a key component of subway vehicles, wheelset drives require professional maintenance after one five-year operation. These maintenance wheelset drives undergo a running-in test. This involves applying a certain driving force to the power input shaft of the wheelset gearbox through an external power mechanism. This forces the wheelset into high-speed circular motion through a secondary gear transmission. The driving force generated by this circular motion is transmitted to the steel components of the subway's running gear via the double-row cylindrical roller bearings within the wheelset axlebox.

[0004] Through patent search, there are mainly several types of existing wheelset drive running-in test devices:

[0005] 1. Application No. CN201911362091.2 uses a pulley drive method to apply a certain driving force to the gearbox power input shaft. This method may occur under high-speed movement. During the rotation of the pulley, there is a relative slip phenomenon between the belt and the power pulley. This phenomenon will cause distortion of the driving force transmission during the running-in of the wheelset. Therefore, the pulley drive cannot effectively simulate the actual operating speed of the urban rail wheelset in real service status.

[0006] 2. Application number CN201610005258.X uses a self-centering positioning clamping device. Before the wheelset drive is run-in tested, multiple operators are required to cooperate and the wheelset drive is lifted by an overhead crane. In addition, the axle boxes on both sides of the wheelset drive are not attached with the urban rail vehicle operating load during the wheelset running-in test. Only the wheelset drive no-load running-in test is conducted, which cannot simulate the wheelset drive running-in conditions during the actual operation of the urban rail vehicle.

[0007] 3. Application No. CN201520785944.4, uses a special loading mechanism to press the wheelset to be tested onto the running-in mechanism for the running-in test. No gearbox support structure is provided. There is a risk of imbalance in the center of gravity of the wheelset drive under high running-in speed conditions during the wheelset running-in test, which causes severe vibration of the overall structure of the wheelset drive, affecting the evaluation of the gearbox vibration level during the wheelset drive running-in test assessment.

[0008] Therefore, proposing a liftable urban rail wheelset drive running-in test device has great significance in this technical field. Summary of the Invention

[0009] In order to solve the defects and shortcomings of the existing technology, the purpose of the present invention is to provide a running-in test bench for urban rail wheelsets with a simple structure, reasonable design and easy use. It uses rails instead of overhead cranes, which facilitates manual pushing of wheelset drives, reduces the process of overhead crane lifting wheelset drives required in traditional running-in test benches, thereby reducing the wheelset driving lifting time and lifting safety risks; in addition, the addition of operating loads simulates the real state, and the test accuracy is higher.

[0010] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: it comprises a through-type strip rail, a hydraulic support rod, a wheelset drive assembly, an axle box support tooling, a support truss, an operating load loading pump, a suspension connecting rod, and a running-in drive box. The through-type strip rail passes through the running-in test workshop, and the hydraulic support rods are symmetrically distributed in pairs on both sides of the through-type strip rail to form a four-point matrix structure, and the top ends of the two groups of hydraulic support rods on the same side are connected to the axle box support tooling; a support truss is set on the upper end of the outer side of the hydraulic support rods distributed in the four-point matrix, and a pair of through-type operating load loading pumps are symmetrically provided on the top plate of the support truss. A load loading pump is operated, and the load loading pump is kept corresponding to the axle box support tooling; the wheelset drive assembly is pushed to the upper end of the hydraulic support rod distributed in a four-point matrix manner along the through-type strip steel rail, and the axle box support tooling and the axle box body sleeved at both ends of the wheelset drive assembly are kept clamped and fixed through the synchronous lifting of the four groups of hydraulic support rods, and the height of the hydraulic support rod is further adjusted to connect the suspension connecting rod at the lower end of the support truss top plate with the gear box in the middle of the wheelset drive assembly, so that the running-in drive box is connected to the universal joint extended on the side of the gear box, and the telescopic rod of the load loading pump is supported in the circular insert at the upper end of the axle box body to simulate pressure.

[0011] Preferably, the axle box body is an integrated structure, with ears on both sides of the front end of the axle box body, folding legs on the bottom of the rear end of the axle box body, and a circular seat on the top of the axle box body; a rotating shaft slot is provided in the middle of the axle box body, and the rotating shaft in the middle of the wheelset drive assembly is inserted into the rotating shaft slot, and the outside of the rotating shaft slot is sealed by the shaft end cover.

[0012] Preferably, the axle box support tooling includes a support base plate, an axle box body nylon locking frame, an inverted U-shaped positioning fixing seat, and a straight positioning fixing seat; the axle box body nylon locking frame is provided at the front end of the upper surface of the support base plate; the inverted U-shaped positioning fixing seat and the straight positioning fixing seat are respectively fixed to the axle box body nylon locking frame and the rear end of the support base plate by bolts.

[0013] Preferably, the front end of the axle box body is clamped in the middle reserved groove of the axle box body nylon locking frame, and the two ears are fixed to the two sides of the top of the axle box body nylon locking frame through an inverted U-shaped positioning fixing seat; the folding legs are fixed on the supporting base plate through the cooperation of the straight positioning fixing seat.

[0014] Preferably, the support truss consists of a support platform and H-shaped columns on both sides; the upper surface of the support platform is provided with a pair of running load loading pumps, and the lower surface of the support platform is connected with a suspension connecting rod and a running-in drive box, and a drive motor is fixed inside the running-in drive box.

[0015] Preferably, the track spacing of the through-type bar rails is consistent with the wheel spacing of the wheelset drive assembly, and the track spacing of the through-type bar rails is adjusted accordingly when used for detecting an extra-wide wheelset drive assembly.

[0016] Preferably, the operating load loading pump is plugged into the circular socket at the upper end of the axle box body to apply an operating load to the axle box body of the wheelset to be tested, simulating the running-in condition of the urban rail wheelset during actual operation.

[0017] After adopting the above structure, the beneficial effects of the present invention are:

[0018] 1. The present invention takes into account the convenience of transporting the wheelset drive, eliminates the traditional method of using an overhead crane to lift the wheelset drive on the running-in test bench, and uses rails instead of overhead cranes, thereby reducing the lifting time and lifting safety risks of the wheelset drive, and thus facilitating the design of the wheelset drive running-in test rhythm;

[0019] 2. The load application mechanism proposed in the present invention can apply an operational load to the axle box of the wheelset to be tested, simulating the wheelset drive running-in condition during the actual operation of an urban rail vehicle;

[0020] 3. The axle box support device proposed in the present invention effectively fixes the axle box body, thereby ensuring that the axle box body is not subject to mechanical vibration wear during the wheelset running-in test. It can take into account the versatility of the use of different wheelset drive axle box structures in multiple projects, and can also quickly perform the installation, disassembly and point calibration of the wheelset drive unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention is described in detail through the following specific implementations and drawings.

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 For the present invention Figure 1 Frontal view of;

[0024] Figure 3This is a schematic diagram of fixing the wheelset assembly of the present invention;

[0025] Figure 4 For the present invention Figure 3 Left view of;

[0026] Figure 5 This is a structural diagram of the axle box 10 of the present invention;

[0027] Explanation of the reference numerals: through-type strip rail 1, hydraulic support rod 2, wheelset drive assembly 3, axle box support tooling 4, support truss 5, running load loading pump 6, suspension connecting rod 7, running-in drive box 8, gear box 9, axle box body 10, circular insert 11, support base plate 40, axle box body nylon locking frame 41, inverted U-shaped positioning fixing seat 42, straight positioning fixing seat 43, ear 101, folding leg 102, rotating shaft slot 103, and axle end cover 104. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention is described below using specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0029] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, the accompanying drawings only show structures and / or processing steps closely related to the solutions according to the present invention, while other details that are not closely related to the present invention are omitted.

[0030] See Figure 1-Figure 5As shown, this specific embodiment adopts the following technical solutions: it includes a through-type strip rail 1, a hydraulic support rod 2, a wheelset drive assembly 3, an axle box support tooling 4, a support truss 5, an operating load loading pump 6, a suspension connecting rod 7, and a running-in drive box 8. The through-type strip rail 1 passes through the running-in test workshop, and the hydraulic support rods 2 are symmetrically distributed in pairs on both sides of the through-type strip rail 1 to form a four-point matrix structure, and the top ends of the two groups of hydraulic support rods 2 on the same side are connected to the axle box support tooling 4; a support truss 5 is set on the upper end of the outer side of the hydraulic support rods 2 distributed in the four-point matrix, and a pair of through-type operating trusses are symmetrically arranged on the top plate of the support truss 5. Load loading pump 6, the running load loading pump 6 keeps corresponding to the axle box support tooling 4; the wheelset drive assembly 3 is pushed to the upper end of the hydraulic support rod 2 distributed in a four-point matrix manner along the through-type strip rail 1, and the axle box support tooling 4 and the axle box body 10 sleeved at both ends of the wheelset drive assembly 3 are kept clamped and fixed through the synchronous lifting of the four groups of hydraulic support rods 2. The height of the hydraulic support rod 2 is further adjusted to connect the suspension connecting rod 7 at the lower end of the top plate of the support truss 5 with the gear box 9 in the middle of the wheelset drive assembly 3, and the running drive box 8 is connected to the universal joint extended on the side of the gear box 9. The telescopic rod of the running load loading pump 6 is supported in the circular insert 11 at the upper end of the axle box body 10.

[0031] Furthermore, the hydraulic support rod 2 is adjusted in height by a built-in pneumatic hydraulic pump. The hydraulic support rod 2 is connected to the axle box support tooling 4 and has the function of adjusting the ground clearance of the wheelset drive, which can ensure that the wheelset drive has sufficient ground clearance during the running-in test, thereby ensuring that the wheel tread is at a sufficient safety distance from the rail surface of the strip rail 1.

[0032] Furthermore, the suspension connecting rod 7 at the front end of the gear box 9 is mechanically connected at one end to the top support platform of the support truss 5 through a high-strength external hexagon bolt, and at the other end to the mounting seat of the gear box 9 through a high-strength external hexagon bolt, to ensure that the gear box is in a stable state during the running-in process and to prevent it from vibrating up and down to create a safety risk.

[0033] Furthermore, the running-in drive device 8 is mechanically connected to the top support platform of the support truss 5 through a running-in drive height adjustment screw, and is mechanically connected to the gear box 9 through a universal joint. The running-in drive device 8 generates a driving force through the electric motor inside it, and transmits the driving force to the gear box 9 through the universal joint. The gear box 9 transmits the driving force to the axle through the secondary gear transmission inside it, causing the axle to rotate. The rotation of the axle drives the rotation of the wheels and bearings, thereby simulating the wheelset drive running-in condition during the actual operation of the urban rail wheels.

[0034] Among them, the axle box body 10 is an integrated structure, with ears 101 provided on both sides of the front end of the axle box body 10, a folding leg 102 provided at the bottom of the rear end of the axle box body 10, and a rotating shaft slot 103 provided in the middle of the axle box body 10. The rotating shaft in the middle of the wheelset drive assembly 3 is inserted into the rotating shaft slot 103, and the outer side of the rotating shaft slot 103 is sealed by the shaft end cover 104; a circular insert 11 is provided at the top of the axle box body 10; the axle box support tooling 4 is connected to the top of the four-point matrix distributed hydraulic support rod 2 by bolts. The entire axle box support tooling 4 is connected, and an integrated integrated design is adopted, including a support base plate 40, an axle box body nylon locking frame 41, an inverted U-shaped positioning fixing seat 42, and a straight positioning fixing seat 43. The internal sub-components of the entire axle box support device (support base plate 40, axle box body nylon locking frame 41, inverted U-shaped positioning fixing seat 42, and straight positioning fixing seat 43) do not need to be disassembled and assembled separately during each operation, which can take into account the versatility of the use of different wheelset drive axle box structures in multiple projects, and at the same time can quickly perform the installation, disassembly and point calibration of the wheelset drive assembly 3.

[0035] Furthermore, the front end of the axle box body 10 is clamped in the middle reserved groove of the axle box body nylon locking frame 41, and the two ear edges 101 are fixed on both sides of the top of the axle box body nylon locking frame 41 through an inverted U-shaped positioning fixing seat 42; the folding legs 102 are fixed on the supporting base plate 40 through the cooperation of the straight positioning fixing seat 43.

[0036] In addition, the support truss 5 is composed of a support platform and H-shaped columns on both sides; the H-shaped columns are arranged in parallel on the pit base, and the top support platform is arranged on the top of a pair of H-shaped columns. The pair of H-shaped columns, the pit base and the top support platform form a test space that allows the wheelset to be tested to pass through; the upper surface of the support platform is provided with a pair of operating load loading pumps 6, and the lower surface of the support platform is connected to the suspension connecting rod 7 and the running-in drive box 8, and the running-in drive box 8 is fixed with a drive motor inside; the support truss 5 is located on both sides of the four-point matrix distributed hydraulic support rod 2; the operating load loading pump 6 is connected to the top support platform of the support truss 5 by multi-layer and multi-pass inert gas shielded welding, and it applies an operating load to the axle box body 10 of the wheelset to be tested, which can simulate the wheelset drive running-in working condition during the actual operation of the urban rail vehicle.

[0037] The present invention eliminates the traditional running-in test bench's method of using an overhead crane to lift the wheelset drive, and uses rails instead of the overhead crane, thereby reducing the wheelset drive lifting time and lifting safety risks, which is beneficial to the rhythmic design of the wheelset drive running-in test; and the proposed load application mechanism can apply an operating load to the axle box body located at the wheelset to be tested, simulating the wheelset drive running-in condition during the actual operation of the urban rail vehicle; in addition, the axle box support device effectively fixes the axle box body, thereby ensuring that the axle box body is not subject to mechanical vibration wear during the wheelset running-in test, and can take into account the versatility of the use of different wheelset drive axle box structures in multiple projects.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

[0039] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An urban rail wheelset running-in test bench, characterized by: It includes a through-type strip rail, a hydraulic support rod, a wheelset drive assembly, an axle box support tooling, a support truss, an operating load loading pump, a suspension connecting rod, and a running-in drive box. The through-type strip rail passes through the running-in test workshop. The hydraulic support rods are symmetrically distributed in pairs on both sides of the through-type strip rail to form a four-point matrix structure, and the top ends of the two groups of hydraulic support rods on the same side are connected to the axle box support tooling; a support truss is set on the upper end of the outer side of the hydraulic support rod distributed in the four-point matrix, and a pair of through-type operating load loading pumps are symmetrically set on the top plate of the support truss. The load loading pump is kept corresponding to the axle box support tooling; the wheelset drive assembly is pushed to the upper end of the hydraulic support rod distributed in a four-point matrix manner along the through-type strip rail, and the axle box support tooling and the axle box body sleeved at both ends of the wheelset drive assembly are kept clamped and fixed through the synchronous lifting of the four sets of hydraulic support rods. The height of the hydraulic support rod is further adjusted to connect the suspension connecting rod at the lower end of the support truss top plate with the gear box in the middle of the wheelset drive assembly, so that the running-in drive box is connected to the universal joint extended on the side of the gear box, and the telescopic rod of the load loading pump is supported in the circular insert at the upper end of the axle box body to simulate pressure; The axle box support fixture comprises a support base plate, a nylon locking bracket for the axle box body, an inverted U-shaped positioning fixing seat, and a straight positioning fixing seat; the front end of the upper surface of the support base plate is provided with the nylon locking bracket for the axle box body; the inverted U-shaped positioning fixing seat and the straight positioning fixing seat are respectively fixed to the nylon locking bracket for the axle box body and the rear end of the support base plate by bolts; The axle box body is an integrated structure, and ears are provided on both sides of the front end of the axle box body. The front end of the axle box body is clamped in the reserved groove in the middle of the nylon locking frame of the axle box body, and the two ears are fixed to the two sides of the top of the nylon locking frame of the axle box body through an inverted U-shaped positioning fixing seat. The rear end bottom of the axle box body is provided with folding legs, and the folding legs are fixed to the supporting base plate through the cooperation of the straight positioning fixing seat. A circular insert is provided at the top of the axle box body, and a rotating shaft slot is provided in the middle of the axle box body. The rotating shaft in the middle of the wheelset drive assembly is inserted in the rotating shaft slot, and the outer side of the rotating shaft slot is sealed by the shaft end cover.

2. The urban rail wheelset running-in test bench according to claim 1, characterized in that: The support truss consists of a support platform and H-shaped columns on both sides; a pair of running load loading pumps are provided on the upper surface of the support platform, and a suspension connecting rod and a running-in drive box are connected to the lower surface of the support platform, and a drive motor is fixed inside the running-in drive box.

3. The urban rail wheelset running-in test bench according to claim 1, characterized in that: The track spacing of the through-type strip rails is consistent with the wheel pair spacing of the wheelset drive assembly.

4. The urban rail wheelset running-in test bench according to claim 1, characterized in that: The operating load loading pump is plugged into the circular socket at the upper end of the axle box body to apply an operating load to the axle box body of the wheelset to be tested, simulating the running-in condition of the urban rail wheelset during actual operation.

5. The urban rail wheelset running-in test bench according to claim 1, characterized in that: The running-in drive box generates driving force through the electric motor inside it, and transmits the driving force to the gear box through the universal joint. The gear box drives the wheels and bearings to rotate through the internal secondary gear transmission.

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