Test tool for dynamic sealing performance of joint bearing of motor train unit

Abstract

The application discloses a dynamic sealing test tool for joint bearings of a motor train unit, which comprises a tool seat and a joint bearing to be detected, a through hole is arranged on the end face of the tool seat and is recessed to accommodate the inner ring of the joint bearing to be detected, a driving part is arranged on the tool seat to drive the outer ring of the joint bearing to be detected to swing, and a water spraying part is arranged on the tool seat to spray water to the joint bearing to be detected when the joint bearing swings. The application solves the problem that the prior art lacks a joint bearing detection tool for simulating the actual operation condition of the joint bearings on the motor train unit and simulating rainy weather to detect the waterproof performance of the joint bearings.

Description

Technical Field

[0001] The present invention relates to the technical field of joint bearing detection tooling, in particular to a dynamic sealing performance testing tooling for joint bearings of electric train sets. Background Art

[0002] In the prior art, the joint bearings at the connection of the EMU carriages will swing during the operation of the EMU, and will be splashed by rainwater in rainy weather. If the sealing performance of the joint bearings on the EMU is low, the splashing rainwater will enter the interior of the joint bearings and corrode the bearings, causing them to fail in operation, thereby affecting the safety of the train. However, the prior art lacks a joint bearing detection tooling that simulates the actual operating conditions of the joint bearings on the EMU and simulates rainy weather to detect the waterproof performance of the joint bearings. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the present invention provides a dynamic sealing test tool for the joint bearings of EMUs, which solves the problem in the existing technology that there is a lack of a joint bearing detection tool that simulates the actual operating conditions of the joint bearings on EMUs and simulates rainy weather to detect the waterproof performance of the joint bearings.

[0004] To achieve the above-mentioned purpose, the present invention provides a dynamic sealing test tool for the joint bearings of EMUs, comprising a tool seat and the joint bearings to be tested, wherein the end face of the tool seat is recessed and provided with a through hole for partially accommodating the inner ring of the joint bearings to be tested, the tool seat is provided with a driving member for driving the outer ring of the joint bearings to be tested to swing, and the tool seat is provided with a water spraying member for spraying water to the joint bearings to be tested when they swing.

[0005] The above technical solution is beneficial in that: the operator places the joint bearing to be tested on the through hole, and then drives the joint bearing to be tested to swing through the driving part, so as to simulate the operating condition of the joint bearing during the actual operation of the EMU, and when the driving part drives the joint bearing to be tested to swing, the water spraying part sprays water towards the joint bearing to be tested, so as to simulate the actual working condition of the joint bearing being eroded by rainwater in rainy weather, and after the water spraying part continues to spray water for a certain period of time, the operator can remove the joint bearing and observe its waterproof condition, so as to determine the sealing performance of the joint bearing, and thereby determine whether the joint bearing is compliant, to ensure that the sealing performance of the joint bearing is excellent during subsequent actual operation, and further ensure that the joint bearing will not be eroded by rainwater on rainy days, resulting in failure of the joint bearing operation.

[0006] The application further provides that the tool seat is provided with a support frame, the driving member comprises a driving motor arranged on the support frame, the driving motor output end is coaxially arranged with the joint bearing shaft hole to be detected, a disc is arranged on the driving motor output end, the driving motor output end is connected with the center of the top surface of the disc, and a contact head for applying a certain torque to the outer ring of the joint bearing to be detected and making it swing when the disc rotates axially is arranged eccentrically on the bottom surface of the disc.

[0007] The above technical solution has the advantages that when the joint bearing to be detected needs to be driven to swing, the driving motor starts the output end to drive the disc to rotate axially, at this time, the disc rotates and makes the contact head arranged eccentrically thereon slide circumferentially on the joint bearing along the central shaft direction of the joint bearing, so that the torque applied by the driving motor can be transmitted to the outer ring of the joint bearing to be detected through the contact head, and then the joint bearing to be detected is driven to swing, so as to simulate the actual operating condition; the arrangement of the contact head in the above technology ensures that the joint bearing to be detected can normally swing, and the eccentric arrangement of the contact head on the disc enables the disc to apply a certain torque to the joint bearing to be detected through the contact head when the disc rotates axially, so that the joint bearing to be detected can normally swing, and the joint bearing can produce composite swing in three directions when the contact head drives the joint bearing to be detected to swing, thereby simulating the actual operating condition of the joint bearing during actual operation of the motor car.

[0008] The application further provides that the support frame is provided with a first through hole for the driving motor output end to pass through, the top surface of the support frame is provided with a support block for supporting the driving motor, the support block is provided with a second through hole for the driving motor output end to pass through, a matched angular contact bearing is sleeved on the driving motor output end, the outer ring of the matched angular contact bearing is arranged in abutment with the inner peripheral wall of the second through hole, a support plate for abutting against the side wall of the matched angular contact bearing is arranged in the first through hole, and the support plate is detachably connected with the bottom surface of the support block.

[0009] The above technical solution has the advantages that the arrangement of the support block in the above technology can support the driving motor, so as to ensure that the driving motor output end can normally guide and drive the disc to rotate, when the driving motor applies torque to the joint bearing to be detected through the contact head, a reaction force will be generated, the reaction force will be transmitted to the driving motor through the contact head, and the arrangement of the matched angular contact bearing in the above technology can prevent the reaction force from acting on the driving motor, thereby avoiding the influence of the output torque of the driving motor.

[0010] The present invention further provides: a force plate is provided on the outer ring of the joint bearing to be tested, the central axis of the force plate is coaxially arranged with the central axis of the disc, a radial joint bearing is provided on the contact head, the contact head and the end face of the force plate are clearance-matched, the outer peripheral wall of the radial joint bearing is movably arranged on the force plate and its outer peripheral wall is partially in contact with the end face of the force plate.

[0011] The benefits of adopting the above technical solution are: the setting of the force plate in the above technology enables the torque applied by the driving motor to act on the force plate through the contact head, and then be transmitted to the joint bearing to be detected by the force plate, thereby ensuring that the torque can be normally applied to the joint bearing to be detected and drive the joint bearing to be detected to swing. At the same time, the setting of the radial joint bearing enables the angle to be adaptively adjusted when the joint bearing to be detected swings, thereby ensuring that the radial joint bearing can slide on the force plate and act on the torque applied by the driving motor on the force plate, so that the force plate transmits the torque and drives the joint bearing to be detected to swing.

[0012] The present invention further provides that: the force-bearing plate and the outer ring of the spherical bearing to be tested are detachably connected by bolts.

[0013] The benefits of adopting the above technical solution are: the force plate and the outer ring of the joint bearing to be tested can be detachably connected, which makes it convenient for the operator to install the joint bearing to be tested on the through hole. At the same time, force plates of different diameters can be installed according to the size of the joint bearing to be tested, so that joint bearings of different sizes to be tested can also be tested, thereby improving the scope of application.

[0014] The present invention further provides that: the water spraying part includes a plurality of nozzles, and the plurality of nozzles are arranged circumferentially around the through hole along the central axis of the through hole, the output ends of the plurality of nozzles are all arranged toward the connection between the outer ring and the inner ring of the joint bearing to be tested, and the input ends of the plurality of nozzles are all water inlet ends for connecting to the output end of an external water pump.

[0015] The benefits of adopting the above technical solution are: in the above technology, several nozzles are arranged circumferentially around the through hole along the central axis of the through hole, so that the water flow sprayed by several nozzles can be sprayed on the connection between the outer ring and the inner ring of the joint bearing to be tested, and then its waterproof sealing performance is tested, thereby simulating the actual operating conditions of the joint bearing; in the above technology, the water inlet end of the nozzle is connected to the output end of the external water pump, and the external water pump is an existing technology, which is used to pressurize the water flow for transmission, so its structure and function will not be described in detail.

[0016] The present invention is further provided with: a first opening passing through the inner wall surface of the through hole, a second opening passing through the inner ring of the joint bearing to be tested, the first opening and the second opening are aligned, a positioning screw is threadedly connected to the first opening, one end of the positioning screw passes through the second opening and is threadedly connected to the second opening, a supporting rib is raised on the outer peripheral wall of the positioning screw, and the supporting rib is buckled on the outer peripheral wall of the inner ring of the joint bearing to be tested.

[0017] The benefits of adopting the above technical solution are: the operator can fix the inner ring of the joint bearing to be tested on the through hole through the positioning screw, thereby ensuring that when the outer ring of the joint bearing to be tested swings, the inner ring of the joint bearing to be tested shakes, causing the joint bearing to be tested to disengage from the through hole or overturn, thereby avoiding test failure. At the same time, the setting of the positioning screw, the first opening and the second opening in the above technology facilitates disassembly and assembly by the operator, and improves the detection efficiency; the setting of the supporting rib in the above technology can support and support the inner ring of the joint bearing to be tested, thereby preventing the inner ring of the joint bearing to be tested from shaking or disengaging from the through hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional view of the present invention;

[0019] Figure 2 It is a front sectional view of the present invention. DETAILED DESCRIPTION

[0020] The application provides a dynamic sealing test tool for joint bearing of motor train unit, which comprises a tool seat 1 and a joint bearing 2 to be detected, a through hole 11 is arranged on the end surface of the tool seat 1 and is used for locally accommodating the inner ring of the joint bearing 2 to be detected, a driving part is arranged on the tool seat 1 and is used for driving the outer ring of the joint bearing 2 to be detected to swing, a water spraying part is arranged on the tool seat 1 and is used for spraying water to the joint bearing 2 to be detected when it swings, a support frame 12 is arranged on the tool seat 1, the driving part comprises a driving motor 3 arranged on the support frame 12, the output end of the driving motor 3 is coaxially arranged with the shaft hole of the joint bearing 2 to be detected, a disc 31 is arranged on the output end of the driving motor 3, the output end of the driving motor 3 is connected with the center of the top surface of the disc 31, an eccentric contact head 32 is arranged on the bottom surface of the disc 31 and is used for applying a certain torque to the outer ring of the joint bearing 2 to be detected and making it swing when the disc 31 rotates axially, a first through hole 121 is arranged on the support frame 12 and is used for penetrating the output end of the driving motor 3, a support block 13 is arranged on the top surface of the support frame 12 and is used for supporting the driving motor 3, a second through hole 131 is arranged on the support block 13 and is used for penetrating the output end of the driving motor 3, a matched angular contact bearing 33 is sleeved on the output end of the driving motor 3, the outer ring of the matched angular contact bearing 33 is arranged in close contact with the inner wall of the second through hole 131, a support plate 14 is arranged in the first through hole 121 and is used for abutting against the side wall of the matched angular contact bearing 33, the support plate 14 is detachably connected with the bottom surface of the support block 13, a stress plate 4 is arranged on the outer ring of the joint bearing 2 to be detected, the central shaft of the stress plate 4 is coaxially arranged with the central shaft of the disc 31, a radial joint bearing 41 is arranged on the contact head 32, the contact head 32 is arranged in clearance fit with the end surface of the stress plate 4, the outer peripheral wall of the radial joint bearing 41 is movably arranged on the stress plate 4 and partially abuts against the end surface of the stress plate 4, the stress plate 4 is detachably connected with the outer ring of the joint bearing 2 to be detected through bolts, the water spraying part comprises a plurality of nozzles 5, the nozzles 5 are arranged in a ring around the central axis of the through hole 11, the output ends of the nozzles 5 are all arranged towards the connecting part between the outer ring and the inner ring of the joint bearing 2 to be detected, the input ends of the nozzles 5 are all water inlet ends used for being connected with the output end of an external water pump, a first opening 111 is arranged on the inner wall of the through hole 11, a second opening 21 is arranged on the inner ring of the joint bearing 2 to be detected, the first opening 111 is arranged in alignment with the second opening 21, a positioning screw 22 is threadedly connected with the first opening 111, one end of the positioning screw 22 penetrates into the second opening 21 and is threadedly connected with the second opening 21, a support stop 221 is arranged on the outer peripheral wall of the positioning screw 22, and the support stop 221 abuts against the outer peripheral wall of the inner ring of the joint bearing 2 to be detected.

[0021] In the above technology, the outer ring of the spherical plain bearing to be tested is marked as 23 in the accompanying drawings of the specification, and the inner ring of the spherical plain bearing to be tested is marked as 24 in the accompanying drawings of the specification.

[0022] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A dynamic sealing test tool for EMU joint bearings, characterized by: The invention comprises a tooling seat and a joint bearing to be detected, wherein the end surface of the tooling seat is recessed and provided with a through hole for partially accommodating the inner ring of the joint bearing to be detected, the tooling seat is provided with a driving member for driving the outer ring of the joint bearing to be detected to swing, the tooling seat is provided with a water spraying member for spraying water to the joint bearing to be detected when it swings, the tooling seat is provided with a support frame, the driving member comprises a driving motor arranged on the support frame, the output end of the driving motor is coaxially arranged with the shaft hole of the joint bearing to be detected, a disc is provided on the output end of the driving motor, and the output end of the driving motor is aligned with the center of the top surface of the disc The disc is connected at the center, and a contact head is eccentrically arranged on the bottom surface of the disc for applying a certain torque to the outer ring of the joint bearing to be detected and causing it to swing when the disc rotates axially. A force plate is arranged on the outer ring of the joint bearing to be detected, and the central axis of the force plate is coaxially arranged with the central axis of the disc. A radial joint bearing is arranged on the contact head, and the contact head is clearance-matched with the end face of the force plate. The outer peripheral wall of the radial joint bearing is movably arranged on the force plate and its outer peripheral wall is partially in contact with the end face of the force plate. The force plate and the outer ring of the joint bearing to be detected are detachably connected by bolts.

2. The dynamic sealing performance test tool for EMU joint bearings according to claim 1, characterized in that: The support frame is provided with a first through-hole for the output end of the driving motor to pass through, and a support block for supporting the driving motor is provided on the top surface of the support frame. A second through-hole for the output end of the driving motor to pass through is provided on the support block. A paired angular contact bearing is sleeved on the output end of the driving motor, and the outer ring of the paired angular contact bearing is fitted with the inner circumferential wall of the second through-hole. A support plate for abutting against the side wall of the paired angular contact bearing is provided in the first through-hole, and the support plate is detachably connected to the bottom surface of the support block.

3. The dynamic sealing performance test tool for EMU joint bearings according to claim 1 is characterized by: The water spraying part includes a plurality of nozzles, which are arranged circumferentially around the through hole along the central axis of the through hole. The output ends of the plurality of nozzles are all arranged toward the connection between the outer ring and the inner ring of the joint bearing to be tested, and the input ends of the plurality of nozzles are all water inlet ends for connecting to the output end of an external water pump.

4. The dynamic sealing performance test tool for EMU joint bearings according to claim 1, characterized in that: A first opening is passed through the inner wall of the through hole, and a second opening is passed through the inner ring of the joint bearing to be tested. The first opening is aligned with the second opening, and a positioning screw is threadedly connected to the first opening. One end of the positioning screw passes through the second opening and is threadedly connected to the second opening. A supporting rib is raised on the outer peripheral wall of the positioning screw, and the supporting rib is buckled on the outer peripheral wall of the inner ring of the joint bearing to be tested.

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