Automatic measuring device for bending moment of universal shaft of motor train unit

Abstract

The present application relates to the technical fields of universal shaft bending moment detection, and particularly relates to a high-speed train universal shaft bending moment automatic measuring device, which comprises a base, a bending moment measuring device and a turnover device, the bending moment measuring device is arranged on the base, the measuring end of the bending moment measuring device is in abutment with the side surface of the flange plate close to the cross shaft, and the turnover device is connected with the through hole on the flange plate; the bending moment measuring device comprises a stand, a linkage cylinder, a bearing base, a bearing, a swing rod, a torque sensor, a fixed plate and a positioning plate, the linkage cylinder is installed at the top end of the stand, the output end of the linkage cylinder is connected with the bearing base, two bearings are arranged on the bearing base, one end of the swing rod is located between the two bearings, the other end of the swing rod is connected with the top end of the torque sensor, one end of the fixed plate is connected with the bottom end of the torque sensor, and the other end of the fixed plate is connected with the positioning plate. The bending moment measuring device can measure the bending moment of the universal shaft, and a large amount of manpower is saved.

Description

Technical Field

[0001] This invention belongs to the field of universal joint bending moment detection technology, and particularly relates to an automatic measuring device for the bending moment of a universal joint in a high-speed train. Background Technology

[0002] During high-speed rail operation, the universal joint is a key component for power transmission. As high-speed rail speeds continue to increase, the performance of the universal joint places higher demands on the stability and safety of the train. The universal joint of a high-speed rail consists of two flanges on either side and a drive shaft in the middle, connected by a cross-shaped universal joint. When transmitting power, the bending moment around the cross-shaped universal joint is a critical stress parameter; abnormal fluctuations in this bending moment are often precursors to wear or failure. However, current methods for detecting the bending moment of high-speed rail universal joints are inadequate, relying solely on manual measurement. Manual measurement is susceptible to factors such as operator experience and operating conditions, making it impossible to eliminate random errors caused by human interference. Furthermore, manual measurement cannot guarantee the perpendicularity of the universal joint flange end face to the rotation center of the universal joint shaft. Therefore, an automatic bending moment measuring device for high-speed train universal joints has been developed. Summary of the Invention

[0003] In view of this, the present invention aims to provide an automatic measuring device for the bending torque of the universal joint of a high-speed train, which solves the problem that the perpendicularity between the flange end face of the universal joint and the rotation center of the universal joint shaft cannot be guaranteed during manual measurement. At the same time, it solves the problems that manual measurement is constrained by variables such as personnel experience and operating conditions, and cannot eliminate random errors caused by human interference, resulting in difficulty in maintaining a uniform level of accuracy in measurement results and additional torque during torque measurement.

[0004] To achieve the above objectives, the technical solution created by this invention is implemented as follows:

[0005] An automatic measuring device for the bending moment of a universal joint in a high-speed train is provided for measuring the bending moment of the universal joint. The universal joint includes a main shaft, a cross shaft, and a flange. The cross shaft is connected to the end of the main shaft, and the flange is installed at the end of the cross shaft. The automatic measuring device for the bending moment of the universal joint in a high-speed train includes:

[0006] The base includes a worktable, support legs, and adjustable feet. The top of the support legs is connected to the corner of the bottom surface of the worktable, and the bottom of the support legs is threaded to the adjustable feet for adjusting the flatness and height of the worktable.

[0007] An end support device is installed on the worktable to support the cross shaft;

[0008] An axial end face positioning device is located on one side of the support platform. The output end of the axial end face positioning device abuts against the side of the flange and is used to position the flange.

[0009] The bending moment measuring device is set on the workbench. The measuring end of the bending moment measuring device abuts against the side of the flange near the cross shaft. The bending moment measuring device and the axial end face positioning device position the flange.

[0010] The flipping device is located between the support platform and the axial end face positioning device. The flipping device is connected to the through hole on the flange and is used to drive the flange to flip.

[0011] An end-face clamping device is mounted on a flipping device and is used to clamp the flange.

[0012] The bending moment measuring device includes a column, a linkage cylinder, a bearing base, bearings, a swing arm, a torque sensor, a fixing plate, and a positioning plate. The bottom end of the column is fixed to the worktable, the linkage cylinder is installed at the top of the column, and the output end of the linkage cylinder is connected to the bearing base. Two bearings are installed on the bearing base. One end of the swing arm is located between the two bearings, and the other end of the swing arm is connected to the top of the torque sensor. One end of the fixing plate is connected to the bottom end of the torque sensor, and the other end of the fixing plate is connected to the positioning plate. The linkage cylinder extends and retracts along the axial direction of the main shaft, causing the bearing base to move back and forth. The two bearings apply force to the swing arm, which drives the torque sensor and the fixing plate to rotate. The positioning plate and the end face clamping device clamp the end of the flange away from the cross axis, so that the flange moves synchronously with the fixing plate, and the bending moment when the main shaft rotates around the cross axis is measured.

[0013] The bottom surface of the positioning plate has an arc-shaped groove that matches the outer wall of the flange near the cross shaft.

[0014] The bearing base includes a vertical plate and a horizontal plate. The vertical plate is connected to the output end of the linkage cylinder. One end of the horizontal plate is connected to the middle of the vertical plate, and the other end of the horizontal plate is suspended. Two bearings are set at both ends of the top surface of the horizontal plate through a rotating shaft. The rocker arm is located between the two bearings and can be rolled to the outer wall of the bearing. The rocker arm is driven to swing through the two bearings.

[0015] Furthermore, the end-face clamping device includes a vertical cylinder, a partition plate, a ball bearing, an eccentric shaft, a cam, a vertical piston cylinder, a push plate, and a guide post. The output end of the vertical cylinder is connected to the ball bearing through the partition plate. The top of the positioning plate is connected to the ball bearing. The top of the eccentric shaft is connected to the side of the ball bearing near the vertical piston cylinder. The cam is rotatably connected to the bottom of the eccentric shaft. The output end of the vertical piston cylinder is connected to the push plate. The push plate can move along the height direction of the guide post. The bottom end of the push plate abuts against the other end of the cam. The cam and the positioning plate clamp the end of the flange away from the cross shaft, preventing the flange from moving axially along the main shaft.

[0016] The cam includes a cam body, a cam rod, a cam hole, and an arc-shaped surface. One end of the cam body is an arc-shaped surface, and the other end of the cam body is connected to one end of the cam rod, with the arc-shaped surface located below the cam rod. The cam hole is opened at the connection between the cam body and the cam rod. The cam hole is rotatably connected to the eccentric shaft bracket through a rotating shaft. The top surface of the other end of the cam rod abuts against the push plate. When the cam rod is subjected to force by the push plate, it pushes the cam rod downward, causing the arc-shaped surface of the cam body to move upward, and together with the positioning plate, clamps the end of the flange away from the cross shaft.

[0017] The ball bearing includes a ball bearing body, a connecting body, ball bearing holes, and a ball bearing. The tops of the four connecting bodies are connected to the corners of the bottom surface of the ball bearing body. Ball bearing holes are provided on the sides of the connecting bodies near the positioning plates. Positioning holes are provided on the positioning plates near the ball bearing holes. A ball bearing is placed between the ball bearing hole and the corresponding positioning hole. When the vertical cylinder works, the output end of the vertical cylinder drives the ball bearing body to move downward through the partition plate. The ball bearing body drives the positioning plate and the cam to move downward to both sides of the flange away from the cross shaft end, and the positioning plate contacts the outer wall of the flange near the cross shaft. The output end of the vertical piston cylinder drives the push plate to move along the height direction of the guide column, pushing the cam rod, so that the cam body and the positioning plate clamp the end of the flange away from the cross shaft.

[0018] The bottoms of both connecting bodies protrude outward to form positioning mounting blocks, and the top of the eccentric shaft bracket is installed between the two positioning mounting blocks.

[0019] When the positioning plate and cam body clamp the end of the flange away from the cross shaft, the rocker arm is located between the two bearings.

[0020] Furthermore, the flipping device includes a flipping plate, a flipping hole, a spring plunger, a pull block, a pull rod, a positioning sleeve, a pull rod ear plate, a thickened block, and a clamping plate. The flipping plate has a flipping hole at its end. The spring plunger passes through the through hole and the flipping hole on the flange and is rotatably connected to the pull block. A positioning sleeve is fitted on the end of the pull rod near the pull block. The pull rod can reciprocate within the positioning sleeve. The positioning sleeve and the pull rod ear plate are rotatably connected by a pin. The pull rod ear plate 87 is fixed to one side of the thickened block. The thickened block, the clamping plate, and the flipping plate are connected by a rotating shaft. The flipping plate can rotate along the axis of the rotating shaft, while the thickened block and the clamping plate do not rotate. The flipping plate rotates 90° by pushing and pulling the pull rod and moving the pull block. After the A end of the cross shaft is tested, the flipping plate drives the universal joint to rotate 90° around its axis to test the torque at the B end of the cross shaft.

[0021] The top surface of the thickened block is recessed inward to form a groove, and the bottom end of the guide post extends into the groove and connects with the side wall of the groove.

[0022] The side of the clamping plate has a rectangular through hole, through which the eccentric shaft bracket and the cam body pass. The vertical cylinder and the vertical piston cylinder are respectively installed on both sides of the clamping plate, and both the vertical cylinder and the vertical piston cylinder are located above the rectangular through hole.

[0023] Furthermore, the axial end face positioning device includes a cylinder positioning seat and a horizontal cylinder. The cylinder positioning seat is set on the worktable, and the horizontal cylinder is installed on the cylinder positioning seat. The output end of the horizontal cylinder is connected to the thickening block. When the horizontal cylinder extends to its limit position, the thickening block drives the flipping plate to abut against the end face of the flange away from the cross shaft. After positioning is completed, the horizontal cylinder retracts, and the thickening block drives the flipping plate away from the flange.

[0024] Furthermore, it also includes a support platform, which is set on the workbench to support the flange. The support platform includes a support column, a follower platform, and a universal ball bearing. The support column is connected to the workbench and is connected to the corner of the bottom surface of the follower platform through the universal ball bearing. The follower platform can support the flange and swing as the flange rotates.

[0025] Furthermore, it also includes an axial propulsion device, which is located on the side of the follower platform away from the tilting plate. One end of the axial propulsion device is connected to the bottom surface of the worktable, and the other end of the axial propulsion device abuts against the flange.

[0026] Furthermore, the axial propulsion device includes a propulsion cylinder, a cylinder seat, a crossbeam, a pressure arm, a pressure arm shaft, a connecting block, and a rotating wheel. One end of the propulsion cylinder is hinged to the cylinder seat, which is connected to the bottom surface of the worktable. The output end of the propulsion cylinder is hinged to the middle of the crossbeam. Both ends of the crossbeam are connected to the middle of the two pressure arms. A rotating wheel is provided at the top of the pressure arm, and the rotating wheel is in rolling connection with the flange. The bottom ends of the two pressure arms are connected by the pressure arm shaft, and both ends of the pressure arm shaft are connected to the connecting block. The connecting block is connected to the top surface of the worktable by bolts. The propulsion cylinder drives the pressure arm to swing, which in turn drives the rotating wheel on the pressure arm to push the flange to move.

[0027] Furthermore, the end support device includes a right-angle positioning plate, a vertical moving cylinder, and a positioning block. The horizontal part of the right-angle positioning plate is connected to the worktable surface. The vertical moving cylinder is installed on the vertical part of the right-angle positioning plate. Both the vertical moving cylinder and the vertical part of the right-angle positioning plate pass through the worktable surface. The positioning block is connected to the output end of the vertical moving cylinder, and the shaft end of the cross shaft is supported by the positioning block.

[0028] Furthermore, it also includes a support mechanism for supporting the spindle. The support mechanism includes a support base and a radial positioning base. Both the support base and the radial positioning base are set on the worktable surface for supporting the spindle. There are two support bases and two radial positioning bases, with the two radial positioning bases set between the two support bases.

[0029] The support base includes a support frame and rollers. The support frame is set on the top surface of the worktable, and the rollers are symmetrically arranged on the top surface of the support frame. The rollers are used to support the spindle and can drive the spindle to rotate along its axis.

[0030] Furthermore, the radial positioning seat includes a cylinder bracket, a lifting cylinder, a radial roller frame, and a positioning roller. The cylinder bracket is set on the worktable, the lifting cylinder is installed on the top surface of the cylinder bracket, the output end of the lifting cylinder is connected to the bottom end of the radial roller frame, and the positioning roller is rotatably set on the radial roller frame. The positioning roller is used to support the main shaft and can drive the main shaft to move axially.

[0031] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0032] (1) The bending moment measuring device created by the present invention can measure the bending moment of the universal joint, saving a lot of manpower and solving the problem that the flange end face of the universal joint cannot be guaranteed to be perpendicular to the rotation center of the main shaft when measuring manually. At the same time, it solves the problem that manual measurement is constrained by variables such as personnel experience and operating status, which makes it difficult to maintain a uniform level of accuracy in the measurement results.

[0033] (2) The present invention creates a method to clamp the end of the flange away from the cross shaft by means of a cam and a positioning plate, thereby preventing the flange from moving axially along the main shaft.

[0034] (3) The push-pull rod created by the present invention drives the pull block to move and realizes the rotation of the flip plate by 90°; after the detection of the A end of the cross shaft is completed, the flipping drives the main shaft to rotate 90° around its axis and the torque is detected at the B end of the cross shaft.

[0035] (4) When the horizontal cylinder of the present invention extends to the limit position, the thickened block drives the flipping plate to abut against the end face of the flange away from the cross shaft. After the positioning is completed, the horizontal cylinder retracts and the thickened block drives the flipping plate away from the flange.

[0036] (5) The follow-up platform created by the present invention can support the flange and swing as the flange rotates.

[0037] (6) The propulsion cylinder created by the present invention drives the pressure arm to swing, and the roller on the pressure arm pushes the flange to move, thereby realizing the universal joint moving along the axial direction.

[0038] (7) The positioning block created by the present invention is made of soft material and contacts the end of the cross shaft to avoid scratching the end of the cross shaft. When the output end of the vertical moving cylinder extends, the positioning block will rise to the predetermined position and press against the end of the cross shaft to position the end of the cross shaft. Attached Figure Description

[0039] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0040] Figure 1 A schematic diagram of the structure of an automatic measuring device for bending torque of a universal joint shaft in a high-speed train, as described in an embodiment of the present invention;

[0041] Figure 2 for Figure 1 Schematic diagram of the middle base;

[0042] Figure 3 for Figure 1 A schematic diagram of the bending moment measuring device;

[0043] Figure 4 for Figure 3 Schematic diagram of the connection structure between the bearing base and the bearing;

[0044] Figure 5 for Figure 3 Structural diagram of the central column;

[0045] Figure 6 for Figure 1 Schematic diagram of the middle end face clamping device;

[0046] Figure 7 for Figure 6 Schematic diagram of the middle cam;

[0047] Figure 8 for Figure 6 A schematic diagram of the structure of the projectile ball;

[0048] Figure 9 for Figure 1 A schematic diagram of the structure of the inverting device;

[0049] Figure 10 for Figure 9 Schematic diagram of the structure of the central flip plate;

[0050] Figure 11 for Figure 9 Schematic diagram of the middle tie rod lug plate;

[0051] Figure 12 for Figure 9 Schematic diagram of the middle plate;

[0052] Figure 13 for Figure 1 Schematic diagram of the connection structure of the bending moment measuring device, the tilting device, and the flange;

[0053] Figure 14 for Figure 1 Schematic diagram of the central axis end face positioning device;

[0054] Figure 15 for Figure 1 A schematic diagram of the structure of the central support platform;

[0055] Figure 16 for Figure 1 Schematic diagram of the central axis propulsion device;

[0056] Figure 17 for Figure 16 Schematic diagram of the structure of the cylinder block;

[0057] Figure 18 for Figure 16 Schematic diagram of the connection structure of the middle crossbeam, the pressure arm, and the pressure arm shaft;

[0058] Figure 19 for Figure 16 Schematic diagram of the middle connecting block;

[0059] Figure 20 for Figure 1 Schematic diagram of the mid-end support device;

[0060] Figure 21 for Figure 20 Schematic diagram of the middle positioning block;

[0061] Figure 22 for Figure 1 Schematic diagram of the middle support base;

[0062] Figure 23 for Figure 1 A schematic diagram of the radial positioning seat.

[0063] Explanation of reference numerals in the attached figures:

[0064] 10. Spindle; 11. Cross shaft; 12. Flange;

[0065] 20. Base; 21. Work surface; 22. Support legs; 23. Adjustable feet;

[0066] 30. Support mechanism; 31. Support base; 32. Radial positioning base;

[0067] 311. Support frame; 312. Rollers;

[0068] 321. Cylinder bracket; 322. Lifting cylinder; 323. Radial roller bracket; 324. Positioning roller;

[0069] 40. End support device; 41. Right-angle positioning plate; 42. Vertical moving cylinder; 43. Positioning block;

[0070] 50. Support platform; 51. Support column; 52. Follow-up platform;

[0071] 60. Axial end face positioning device; 61. Cylinder positioning seat; 62. Horizontal cylinder;

[0072] 70. Bending moment measuring device; 71. Column; 72. Linkage cylinder; 73. Bearing base; 74. Bearing; 75. Swing rod; 76. Torque sensor; 77. Fixing plate; 78. Positioning plate;

[0073] 731. Vertical board; 732. Horizontal board;

[0074] 781. Arc-shaped groove; 782. Positioning hole;

[0075] 80. Tilting device; 81. Tilting plate; 82. Tilting hole; 83. Spring plunger; 84. Pull block; 85. Pull rod; 86. Positioning sleeve; 87. Pull rod ear plate; 88. Thickened block; 89. Clamping plate;

[0076] 811. Flip-over plate main body; 812. Flip-over connecting plate;

[0077] 871. Ear plate body; 872. Inverted U-shaped fixing plate;

[0078] 881. Groove;

[0079] 891. Rectangular through hole;

[0080] 90. End face clamping device; 91. Vertical cylinder; 92. Partition plate; 93. Ball body; 94. Eccentric shaft bracket; 95. Cam; 96. Vertical piston cylinder; 97. Push plate; 98. Guide column;

[0081] 931. Main body of the marble; 932. Connecting body; 933. Marble hole; 934. Positioning and mounting block;

[0082] 951. Cam body; 952. Cam rod; 953. Cam hole; 954. Arc-shaped surface;

[0083] 100. Axial propulsion device; 101. Propulsion cylinder; 102. Cylinder seat; 103. Crossbeam; 104. Pressure arm; 105. Pressure arm shaft; 106. Connecting block; 107. Rotary wheel;

[0084] 1021. Cylinder base; 1022. Boss; 1023. Connecting hole;

[0085] 1041. Diagonal bar; 1042. Curved bar; 1043. Horizontal bar; 1044. Rotating ring. Detailed Implementation

[0086] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not constitute a limitation thereof.

[0087] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0088] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0089] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0090] The invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0091] like Figures 1 to 5As shown, an automatic measuring device for the bending moment of a universal joint in a high-speed train is used to measure the bending moment of the universal joint. The universal joint includes a main shaft 10, a cross shaft 11, and a flange 12. The cross shaft 11 is connected to the end of the main shaft 10, and the flange 12 is installed on the end of the cross shaft 11. The automatic measuring device for the bending moment of the universal joint in a high-speed train includes:

[0092] The base 20 includes a worktable 21, support legs 22, and adjusting feet 23. The top of the support legs 22 is welded and fixed to the corner of the bottom surface of the worktable 21, and the bottom of the support legs 22 is threadedly connected to the adjusting feet 23 to adjust the flatness of the worktable 21. The worktable 21 has a reserved groove for the installation of the support seat 31, the radial positioning seat 32, and the axial propulsion device 100. The end support device 40, the support platform 50, the axial end face positioning device 60, the end face clamping device 90, the bending moment measuring device 70, and the flipping device 80 are installed on the worktable 21 by screws.

[0093] An end support device 40 is provided on the worktable 21 to support the cross shaft 11.

[0094] An axial end face positioning device 60 is provided on one side of the support platform 50. The output end of the axial end face positioning device 60 abuts against the side of the flange 12 and is used to position the flange 12.

[0095] A bending moment measuring device 70 is set on a workbench 21. The measuring end of the bending moment measuring device 70 abuts against the side of the flange 12 near the cross shaft 11. The bending moment measuring device 70 and the axial end face positioning device 60 position the flange 12.

[0096] The flipping device 80 is disposed between the support platform 50 and the axial end face positioning device 60. The flipping device 80 is connected to the through hole on the flange 12 and is used to drive the flange 12 to flip.

[0097] The end face clamping device 90 is mounted on the flipping device 80 and is used to clamp the flange 12.

[0098] The bending moment measuring device 70 includes a column 71, a linkage cylinder 72, a bearing base 73, bearings 74, a rocker arm 75, a torque sensor 76, a fixing plate 77, and a positioning plate 78. The bottom end of the column 71 is fixed to the worktable 21. The linkage cylinder 72 is installed at the top of the column 71, and its output end is connected to the bearing base 73. Two bearings 74 are provided on the bearing base 73. One end of the rocker arm 75 is located between the two bearings 74, and the other end of the rocker arm 75 is connected to the top of the torque sensor 76. The fixing plate 77... One end is connected to the bottom end of the torque sensor 76, and the other end of the fixing plate 77 is connected to the positioning plate 78. The linkage cylinder 72 drives the bearing base 73 to reciprocate along the axial extension of the main shaft 10. The two bearings 74 apply force to the rocker arm 75. The rocker arm 75 drives the torque sensor 76 and the fixing plate 77 to rotate. The positioning plate 78 and the end face clamping device 90 clamp the end of the flange 12 away from the cross shaft 11 so that the flange 12 moves synchronously with the fixing plate 77, and the bending torque of the main shaft 10 when it rotates around the cross shaft 11 is measured.

[0099] The bottom surface of the positioning plate 78 has an arc-shaped groove 781, which is adapted to the outer wall of the flange 12 near the cross shaft 11.

[0100] The bearing base 73 includes a vertical plate 731 and a horizontal plate 732. The vertical plate 731 is connected to the output end of the linkage cylinder 72. One end of the horizontal plate 732 is connected to the middle of the vertical plate 731, and the other end of the horizontal plate 732 is suspended. Two bearings 74 are set at both ends of the top surface of the horizontal plate 732 through a rotating shaft. The rocker arm 75 is located between the two bearings 74 and can be rolled to the outer wall of the bearings 74. The rocker arm 75 is driven to swing through the two bearings 74.

[0101] The linkage cylinder 72 includes two cylinders. One cylinder is mounted on the top of the column 71, and its output end is connected to the other cylinder. The output end of the other cylinder is connected to the bearing base 73. The stroke is increased by linking the two cylinders.

[0102] like Figure 1 , Figures 6 to 8As shown, the end face clamping device 90 includes a vertical cylinder 91, a partition 92, a ball body 93, an eccentric shaft 94, a cam 95, a vertical piston cylinder 96, a push plate 97, and a guide post 98. The output end of the vertical cylinder 91 is connected to the ball body 93 through the partition 92. The top end of the positioning plate 78 is connected to the ball body 93. The top end of the eccentric shaft 94 is connected to the side of the ball body 93 near the vertical piston cylinder 96. The cam 95 is rotatably connected to the bottom of the eccentric shaft 94. The output end of the vertical piston cylinder 96 is connected to the push plate 97. The push plate 97 can move along the height direction of the guide post 98. The bottom end of the push plate 97 abuts against the other end of the cam 95. The cam 95 and the positioning plate 78 clamp the end of the flange 12 away from the cross shaft 11, preventing the flange 12 from moving axially along the main shaft 10.

[0103] The cam 95 includes a cam body 951, a cam rod 952, a cam hole 953, and an arc surface 954. One end of the cam body 951 is the arc surface 954, and the other end of the cam body 951 is connected to one end of the cam rod 952, with the arc surface 954 located below the cam rod 952. The cam hole 953 is opened at the connection between the cam body 951 and the cam rod 952. The cam hole 953 is rotatably connected to the eccentric shaft bracket 94 via a rotating shaft. The top surface of the other end of the cam rod 952 abuts against the push plate 97. When the cam rod 952 is subjected to force by the push plate 97, it pushes the cam rod 952 to move downward, causing the arc surface 954 of the cam body 951 to move upward, and together with the positioning plate 78, clamps the end of the flange 12 away from the cross shaft 11.

[0104] The ball body 93 includes a ball body 931, connecting bodies 932, ball holes 933, and balls. The tops of the four connecting bodies 932 are connected to the bottom corners of the ball body 931. Ball holes 933 are provided on the sides of the connecting bodies 932 near the positioning plate 78. Positioning holes 782 are provided on the positioning plate 78 near the ball holes 933. Balls are positioned between the ball holes 933 and the corresponding positioning holes 782. When the vertical cylinder 91 operates, the vertical cylinder 91... The output end drives the ball body 93 to move downward through the partition plate 92. The ball body 93 drives the positioning plate 78 and the cam 95 to move downward to both sides of the flange 12 away from the end of the cross shaft 11, and the positioning plate 78 contacts the outer wall of the flange 12 near the cross shaft 11. The output end of the vertical piston cylinder 96 drives the push plate 97 to move along the height direction of the guide column 98, pushing the cam rod 952, so that the cam body 951 and the positioning plate 78 clamp the end of the flange 12 away from the cross shaft 11.

[0105] The bottoms of the two connecting bodies 932 protrude outward to form positioning mounting blocks 934, and the top of the eccentric shaft bracket 94 is installed between the two positioning mounting blocks 934.

[0106] When the positioning plate 78 and the cam body 951 clamp the end of the flange 12 away from the cross shaft 11, the rocker arm 75 is located between the two bearings 74.

[0107] A guide protrusion is provided on one side of the push plate 97, and a guide groove is provided on the side of the guide post 98. The guide protrusion extends into the guide groove, and the guide is guided by the cooperation of the guide groove and the guide protrusion to guide the movement direction of the push plate 97.

[0108] The cam 95 and positioning plate 78 of the end clamping device 90 clamp the end of the flange 12 away from the cross shaft 11. During bending moment measurement, the rotational force is transmitted to the main shaft 10 and the cross shaft 11 through the cam 95 and positioning plate 78, ensuring that the distance from the end face of the flange 12 to the rotation center of the cross shaft 11 is 110mm, and ensuring that the flange 12 and the main shaft 10 are perpendicular during the measurement process.

[0109] like Figure 1 , Figures 9 to 13 As shown, the flipping device 80 includes a flipping plate 81, a flipping hole 82, a spring plunger 83, a pull block 84, a pull rod 85, a positioning sleeve 86, a pull rod ear plate 87, a thickened block 88, and a clamping plate 89. The flipping plate 81 has a flipping hole 82 at its end. The spring plunger 83 passes through the through hole and the flipping hole 82 on the flange 12 and is rotatably connected to the pull block 84. A positioning sleeve 86 is fitted onto the end of the pull rod 85 near the pull block 84. The pull rod 85 can reciprocate within the positioning sleeve 86. The positioning sleeve 86 and the pull rod ear plate 89 are connected. The components 7 are rotatably connected by a pin. The pull rod ear plate 87 is fixed to one side of the thickened block 88. The thickened block 88, the clamping plate 89 and the flip plate 81 are connected by a rotating shaft. The flip plate 81 can rotate along the axis of the rotating shaft. The thickened block 88 and the clamping plate 89 do not rotate. The flip plate 81 is rotated 90° by pushing and pulling the pull rod 85 to drive the pull block 84 to move. After the A end of the cross shaft 11 is tested, the flip plate 81 drives the main shaft 10 to rotate 90° around its axis to test the torque at the B end of the cross shaft 11.

[0110] The flip plate 81 includes a flip plate body 811 and a flip connecting plate 812. The outer wall of the flip plate body 811 protrudes outward to form four flip connecting plates 812. A flip hole 82 is provided on the side of one flip connecting plate 812. The flip hole 82 is located near the end of the flip connecting plate 812 away from the flip plate body 811.

[0111] The pull rod ear plate 87 includes an ear plate body 871 and an inverted U-shaped fixing plate 872. The ear plate body 871 is disposed on the top surface of the inverted U-shaped fixing plate 872. Both the ear plate body 871 and the inverted U-shaped fixing plate 872 are fixed to the side of the thickened block 88 by screws. The pull rod 85 is disposed inside the inverted U-shaped fixing plate 872 and is connected to the two vertical parts of the inverted U-shaped fixing plate 872 by a pin, so that the pull rod 85 can swing around the pin.

[0112] The top surface of the thickened block 88 is recessed inward to form a groove 881. The bottom end of the guide post 98 extends into the groove 881 and is connected to the side wall of the groove 881.

[0113] A rectangular through hole 891 is provided on the side of the clamping plate 89. The eccentric shaft bracket 94 and the cam body 951 pass through the rectangular through hole 891. The vertical direction cylinder 91 and the vertical direction plunger cylinder 96 are respectively installed on both sides of the clamping plate 89, and both the vertical direction cylinder 91 and the vertical direction plunger cylinder 96 are located above the rectangular through hole 891.

[0114] like Figure 1 , Figure 14 As shown, the axial end face positioning device 60 includes a cylinder positioning seat 61 and a horizontal cylinder 62. The cylinder positioning seat 61 is fixed to the worktable 21 by bolts, and the horizontal cylinder 62 is installed on the cylinder positioning seat 61 by bolts. The output end of the horizontal cylinder 62 is connected to the thickening block 88 by bolts. When the horizontal cylinder 62 extends to its limit position, the thickening block 88 drives the flipping plate 81 to abut against the end face of the flange 12 away from the cross shaft 11. The end face clamping device 90 works, clamping the end of the flange 12 away from the cross shaft 11 by the cam 95 and the positioning plate 78, and measuring the bending moment. After positioning is completed, the horizontal cylinder 62 retracts, and the thickening block 88 drives the flipping plate 81 away from the flange 12.

[0115] like Figure 1 , Figure 15 As shown, it also includes a support platform 50, which is set on the workbench 21 and is used to support the flange 12. The support platform 50 includes four support columns 51, a follower platform 52 and a universal ball bearing. The four support columns 51 are bolted to the workbench 21, and the four support columns 51 are respectively connected to the corner of the bottom surface of the follower platform 52 through the universal ball bearing. The follower platform 52 can support the flange 12 and swing as the flange 12 rotates.

[0116] During bending moment detection, the end face of flange 12 moves with the follower platform 52. The weight and friction of the end face of flange 12 itself prevent it from affecting the measurement results. The follower platform 52 can ensure that the end face of flange 12 is perpendicular to the shaft of spindle 10.

[0117] like Figure 1 , Figures 16 to 19 As shown, it also includes an axial propulsion device 100, which is disposed on the side of the follower platform 52 away from the tilting plate 81. One end of the axial propulsion device 100 is connected to the bottom surface of the worktable 21, and the other end of the axial propulsion device 100 abuts against the flange 12.

[0118] The axial propulsion device 100 includes a propulsion cylinder 101, a cylinder seat 102, a crossbeam 103, a pressure arm 104, a pressure arm shaft 105, a connecting block 106, and a rotating wheel 107. One end of the propulsion cylinder 101 is hinged to the cylinder seat 102, and the cylinder seat 102 is fixedly connected to the bottom surface of the worktable 21 by bolts. The output end of the propulsion cylinder 101 is hinged to the middle part of the crossbeam 103, and both ends of the crossbeam 103 are bolted to the middle parts of the two pressure arms 104. The pressure arm 104 is connected by a roller 107 at its top end, which is rolled to the flange 12. The bottom ends of the two parallel pressure arms 104 are connected by a pressure arm shaft 105. The two ends of the pressure arm shaft 105 are connected to a connecting block 106, which is bolted to the top surface of the worktable 21. The pressure arm 104 is swung by a push cylinder 101, which in turn drives the roller 107 on the pressure arm 104 to move the flange 12.

[0119] The propulsion cylinder 101 is tilted. When the output end of the propulsion cylinder 101 extends and drives the pressure arm 104 to swing, the pressure arm 104 presses against the flange 12 and drives the main shaft 10 to move along the axial direction until the propulsion cylinder 101 moves to the predetermined position. At this time, the main shaft 10 reaches the detection position and constrains the universal joint by one degree of freedom. The flange 12 and the main shaft 10 are in a perpendicular state through the cooperation of the thickening block 88.

[0120] The pressure arm 104 includes a diagonal bar 1041, an arc-shaped bar 1042, a horizontal bar 1043, and a rotating ring 1044. The bottom end of the diagonal bar 1041, the top end of the arc-shaped bar 1042, and one end of the horizontal bar 1043 are connected. A rotating wheel 107 is rotatably mounted on the top end of the diagonal bar 1041. The end of the crossbeam 103 is connected to the other end of the horizontal bar 1043. The bottom end of the arc-shaped bar 1042 is connected to the rotating ring 1044, which is sleeved on the pressure arm shaft 105. When the propulsion cylinder 101 works, the crossbeam 103 pushes the two pressure arms 104 to swing along the pressure arm shaft 105. The rotating wheel 107 at the end of the pressure arm 104 applies force to the flange 12, pushing the flange 12 to drive the cross shaft 11 and the main shaft 10 to move.

[0121] The cylinder base 102 includes a cylinder base 1021, a boss 1022, and a connecting hole 1023. The cylinder base 1021 is fixed to the bottom surface of the worktable 21 by screws. The boss 1022 is installed on the bottom surface of the cylinder base 1021. The end of the boss 1022 away from the cylinder base 1021 is provided with a connecting hole 1023. The connecting hole 1023 is connected to the end of the propulsion cylinder 101 through a rotating shaft. The boss 1022 and the propulsion cylinder 101 can rotate around the rotating shaft.

[0122] The crossbeam 103 has a connecting protrusion on the middle of the side away from the pressure arm 104. The output end of the propulsion cylinder 101 is connected to a Y-shaped fork. The Y-shaped fork and the connecting protrusion are connected by a pin, and the Y-shaped fork and the connecting protrusion can swing along the axis of the pin.

[0123] like Figure 1 , Figures 20 to 21 As shown, the end support device 40 includes a right-angle positioning plate 41, a vertical moving cylinder 42, and a positioning block 43. The horizontal part of the right-angle positioning plate 41 is connected to the worktable surface 21 by bolts. The vertical moving cylinder 42 is installed on the vertical part of the right-angle positioning plate 41. Both the vertical moving cylinder 42 and the vertical part of the right-angle positioning plate 41 pass through the worktable surface 21. The positioning block 43 and the output end of the vertical moving cylinder 42 are connected by countersunk bolts. The positioning block 43 supports the shaft end of the cross shaft 11.

[0124] The positioning block 43 has a trapezoidal cross section. The top of the positioning block 43 abuts against the cross shaft 11. The positioning block 43 is made of soft material and contacts the shaft end of the cross shaft 11 to avoid scratching the shaft end of the cross shaft 11. When the output end of the vertical moving cylinder 42 extends, the positioning block 43 will rise to the predetermined position and press against the shaft end of the cross shaft 11 to position the end of the cross shaft 11.

[0125] like Figure 1 , Figures 22 to 23 As shown,

[0126] It also includes a support mechanism 30, which is used to support the spindle 10. The support mechanism 30 includes a support base 31 and a radial positioning base 32. Both the support base 31 and the radial positioning base 32 are set on the worktable surface 21 and are used to support the spindle 10. There are two support bases 31 and two radial positioning bases 32. The two radial positioning bases 32 are set between the two support bases 31.

[0127] The support base 31 includes a support frame 311 and rollers 312. The support frame 311 is disposed on the top surface of the worktable 21. Rollers 312 are symmetrically disposed on the top surface of the support frame 311. The rollers 312 are mounted on the support frame 311 by pins. The spindle 10 under test is suspended on the two rollers 312 and the radial positioning seat 32. The rollers 312 are used to support the spindle 10 and can drive the spindle 10 to rotate along its axis. The radial positioning seat 32 is used to support the spindle 10 and can drive the spindle 10 to move axially.

[0128] The radial positioning seat 32 includes a cylinder bracket 321, a lifting cylinder 322, a radial roller frame 323, and a positioning roller 324. The cylinder bracket 321 is mounted on the worktable 21. The lifting cylinder 322 is mounted on the top surface of the cylinder bracket 321. The output end of the lifting cylinder 322 is connected to the bottom end of the radial roller frame 323. The positioning roller 324 is rotatably mounted on the radial roller frame 323. The positioning roller 324 is used to support the main shaft 10. The lifting cylinder 322 drives the main shaft 10 to complete the lifting action. The positioning roller 324 can drive the main shaft 10 to move along the axial direction.

[0129] After completing the detection of the highest rotational torque value of the two cross shafts 11 at one end of the universal joint, the device is returned to its original position after manual confirmation of exit. The universal joint is then removed from the equipment and rotated 180° using a gantry crane before being re-clamped onto the equipment. The detection process is repeated. The preset detection content is completed, the detection report is output, and the subsequent process is executed after manual confirmation.

[0130] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A device for automatically measuring the bending moment of a universal shaft of a motor train unit, for measuring the bending moment of a universal shaft, the universal shaft comprising a main shaft, a cross shaft and a flange, the shaft end of the main shaft being connected with the cross shaft, the shaft end of the cross shaft being installed with the flange, characterized in that, The automatic measuring device for the bending moment of the universal shaft of a motor train unit comprises: a base including a workbench and support legs, the top ends of the support legs being connected to the bottom corners of the workbench; an end support device arranged on the workbench for supporting the cross shaft; an axial end face positioning device, the output end of which abuts against the side of the flange plate for positioning the flange plate; a bending moment measuring device, the measuring end of which abuts against the side of the flange plate close to the cross shaft for positioning the flange plate; a turnover device connected to the flange plate for turning over the flange plate; an end face clamping device mounted on the turnover device for clamping the flange plate; the bending moment measuring device comprises a stand, a linkage cylinder, a bearing base, bearings, a swing lever, a torque sensor, a fixed plate and a positioning plate, the bottom end of the stand being fixed to the workbench, the linkage cylinder being mounted at the top end of the stand, the output end of the linkage cylinder being connected to the bearing base, two bearings being arranged on the bearing base, one end of the swing lever being located between the two bearings, the other end of the swing lever being connected to the top end of the torque sensor, one end of the fixed plate being connected to the bottom end of the torque sensor, the other end of the fixed plate being connected to the positioning plate, the bearing base being reciprocated along the axial direction of the main shaft by the linkage cylinder, the two bearings applying force to the swing lever, the swing lever driving the torque sensor and the fixed plate to rotate, and the end part of the flange plate away from the cross shaft being clamped by the positioning plate and the end face clamping device, so that the flange plate moves synchronously with the fixed plate, and the bending moment of the main shaft rotating around the cross shaft is measured.

2. The EMU cardan shaft bending moment automatic measuring device according to claim 1, characterized in that: the end face clamping device comprises a vertical direction cylinder, a partition plate, a ball body, an eccentric shaft support, a cam, a vertical direction plunger cylinder, a push plate and a guide column, the output end of the vertical direction cylinder being connected to the ball body through the partition plate, the top end of the positioning plate being connected to the ball body, the top end of the eccentric shaft support being connected to the side of the ball body close to the vertical direction plunger cylinder, the cam being rotatably connected to the bottom of the eccentric shaft support, the output end of the vertical direction plunger cylinder being connected to the push plate, the push plate moving along the height direction of the guide column, the bottom end of the push plate abutting against the other end of the cam, and the end part of the flange plate away from the cross shaft being clamped by the cam and the positioning plate to avoid the flange plate moving along the axial direction of the main shaft.

3. The EMU cardan shaft bending moment automatic measuring device according to claim 2, characterized in that: The turnover device comprises a turnover plate, a turnover hole, a spring plunger, a pulling block, a pulling rod, a positioning sleeve, a pulling rod ear plate, a thickened block and a clamping plate, an end of the turnover plate is provided with the turnover hole, the spring plunger passes through the through hole on the flange plate and the turnover hole, and is rotationally connected with the pulling block, the end of the pulling rod close to the pulling block is sleeved with the positioning sleeve, the pulling rod reciprocally moves in the positioning sleeve, the positioning sleeve and the pulling rod ear plate are rotationally connected through a pin shaft, the pulling rod ear plate is fixed to one side of the thickened block, the thickened block, the clamping plate and the turnover plate are connected through a rotating shaft, the turnover plate rotates along the axis of the rotating shaft, the pulling rod is pushed and pulled to drive the pulling block to move and drive the turnover plate to rotate; when the A end of the cross shaft finishes detection, the turnover plate drives the universal shaft to rotate 90° around the axis thereof to detect the torque of the B end of the cross shaft; The top surface of the thickened block is inwardly recessed in the middle to form a groove, the bottom end of the guide column extends into the groove and is connected with the side wall of the groove; The side surface of the clamping plate is provided with a rectangular through hole, the eccentric shaft support and the cam pass through the rectangular through hole, the vertical direction cylinder and the vertical direction plunger cylinder are respectively installed on the two sides of the clamping plate, and the vertical direction cylinder and the vertical direction plunger cylinder are located above the rectangular through hole.

4. The EMU cardan shaft bending moment automatic measuring device according to claim 3, characterized in that: The axial end surface positioning device comprises a cylinder positioning seat and a horizontal direction cylinder, the cylinder positioning seat is arranged on the workbench surface, the horizontal direction cylinder is installed on the cylinder positioning seat, the output end of the horizontal direction cylinder is connected with the thickened block, when the output end of the horizontal direction cylinder extends to the limit position, the thickened block drives the turnover plate to abut against the end surface of the flange plate away from the cross shaft and is positioned, and when the positioning is finished, the output end of the horizontal direction cylinder is retracted to drive the turnover plate away from the flange plate through the thickened block.

5. The EMU card universal shaft bending moment automatic measuring device according to claim 4, characterized in that: Further comprising a supporting platform, the supporting platform is arranged on the workbench surface and is used for supporting the flange plate; the supporting platform comprises a supporting column, a follow-up platform and a universal ball bearing, the supporting column is connected with the workbench surface, the supporting column is connected with the bottom corner of the follow-up platform through the universal ball bearing, the follow-up platform supports the flange plate and swings with the rotation of the flange plate.

6. The EMU card universal shaft bending moment automatic measuring device according to claim 5, characterized in that: Further comprising an axial advancing device, the axial advancing device is arranged on the side of the follow-up platform away from the turnover plate, one end of the axial advancing device is connected with the bottom surface of the workbench surface, and the other end of the axial advancing device abuts against the flange plate.

7. The EMU cardan shaft bending moment automatic measuring device according to claim 6, characterized in that: The axial propulsion device comprises a propulsion cylinder, a cylinder base, a crossbeam, a pressing arm, a pressing arm shaft, a connecting block and a rotating wheel, one end of the propulsion cylinder is hingedly connected with the cylinder base, the cylinder base is connected with the bottom surface of the workbench surface, the output end of the propulsion cylinder is hingedly connected with the middle part of the crossbeam, the two ends of the crossbeam are connected with the middle parts of the two pressing arms, the top end of the pressing arm is provided with the rotating wheel, the rotating wheel is rollingly connected between the flange plate, the bottom ends of the two pressing arms are connected through the pressing arm shaft, the two ends of the pressing arm shaft are respectively connected with the connecting blocks, the connecting blocks are connected with the top surface of the workbench surface through bolts, the pressing arm is swung through the propulsion cylinder, and the rotating wheel on the pressing arm drives the flange plate to move.

8. The EMU card universal shaft bending moment automatic measuring device according to claim 1, characterized in that: The end support device comprises a right-angle positioning plate, a vertical direction moving cylinder and a positioning block, the horizontal part of the right-angle positioning plate is connected with the workbench surface, the vertical direction moving cylinder is installed on the vertical part of the right-angle positioning plate, the vertical direction moving cylinder and the vertical part of the right-angle positioning plate penetrate through the workbench surface, the positioning block is connected with the output end of the vertical direction moving cylinder, and the shaft end of the cross shaft is supported through the positioning block.

9. The EMU card universal shaft bending moment automatic measuring device according to claim 1, characterized in that: The support mechanism is further included for supporting the main shaft, the support mechanism comprises a support base and a radial positioning base, the support base and the radial positioning base are both arranged on the workbench surface and used for supporting the main shaft, the number of the support base and the radial positioning base is both two, and two radial positioning bases are arranged between two support bases. The support base comprises a support frame and a roller, the top surface of the support frame is symmetrically provided with the rollers, the rollers are used for supporting the main shaft and driving the main shaft to rotate along the axis.

10. The EMU card universal shaft bending moment automatic measuring device according to claim 9, characterized in that: The radial positioning base comprises a cylinder support, a lifting cylinder, a radial roller frame and a positioning roller, the cylinder support is arranged on the workbench surface, the lifting cylinder is installed on the top surface of the cylinder support, the output end of the lifting cylinder is connected with the bottom end of the radial roller frame, the positioning roller is rotationally arranged on the radial roller frame, and the positioning roller is used for supporting the main shaft and driving the main shaft to move along the axial direction.

Images