Device for measuring free rotation angle and pressure of car coupler and tail frame

Abstract

The utility model discloses a car coupler and tail frame free rotation angle and pressure measuring device, which is provided with a scale assembly and a pointer assembly, the axis of an arc-shaped dial of the scale assembly coincides with the axis of a simulation pin column, a pointer of the pointer assembly is positioned in the middle of a car coupler, and the extension direction of the pointer assembly is parallel to the extension direction of the car coupler. The numerical value pointed by the pointer can be directly read, the free rotation angle of the car coupler and the tail frame can be quickly and accurately obtained, other parameters do not need to be measured, and the angle parameters are more accurate; besides, a fixing assembly is arranged, the tail frame is clamped through two clamping plates, the stability of the tail frame in the measuring process is guaranteed, the fixing assembly comprises a first clamping structure and a second clamping structure, preliminary fixing and secondary fixing are achieved, the fixing stability is improved, and it is guaranteed that the tail frame does not shake in the measuring process.

Description

Technical Field

[0001] The utility model relates to the technical field of locomotive safety operation detection equipment, in particular to a device for measuring the free rotation angle and pressure of a coupler and a tail frame. Background Art

[0002] The train cars are connected to each other by couplers, which are in turn connected to the tail frame mounted on the cars. Under a large coupling pressure, if the coupler rotation angle is too large, the coupler will become unstable, the lateral force of the wheel axle will exceed the standard, and the locomotives will have different degrees of lateral deviation. In severe cases, the locomotive may derail. Therefore, for the safe operation of the locomotive, the free rotation angle of the coupler and the tail frame needs to be measured when the coupler and the tail frame leave the factory. In the patent "Couple Free Rotation Angle Measuring Device and Coupler Free Rotation Angle Measuring Method" (Announcement No. CN 113654446 B), a coupler free rotation angle measuring device is disclosed. The device installs an angle disc on the coupler tail frame through a base, and then installs a tip on the coupler through a support seat. The tip points to the angle disc to form an observable angle. The angle between the coupler and the rotating axis of the angle disc is then used to form multiple triangles through other measurement data. The angle between the axis of the coupler and the coupler pin, that is, the free rotation angle between the coupler and the coupler tail frame, is finally obtained through trigonometric functions.

[0003] However, since the axis of the hook tail pin and the axis of the rotation axis of the angle plate are not on the same vertical line, it is necessary to measure the distance L1 between the two. Not only does this require other measuring tools, but the hook tail pin is located below the angle plate, making it inconvenient for users to measure. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a device for measuring the free rotation angle and pressure of a coupler and a tail frame.

[0005] The utility model provides a device for measuring the free rotation angle and pressure of a coupler and a tail frame, which is used to measure the free rotation angle between the coupler and the tail frame, and includes:

[0006] A simulated pin is rotatably connected between the coupler and the tail frame;

[0007] A scale assembly includes an arc-shaped scale plate provided on the top of the simulated pin, wherein the axis of the arc-shaped scale plate coincides with the axis of the simulated pin, and an angle scale line is provided on the top surface of the arc-shaped scale plate near the edge of the coupler;

[0008] The pointer assembly comprises a central column arranged at the center position of the coupler, an indicator needle is provided at the top end of the central column, and an extending direction of the indicator needle is parallel to the extending direction of the coupler.

[0009] According to the technical solution provided in the embodiment of the present application, a limiting ring is provided at the bottom end of the simulated pin, a slot is provided at the top end of the simulated pin, a U-shaped card is inserted into the slot, and the arc-shaped dial is provided at the top end of the U-shaped card.

[0010] According to the technical solution provided in the embodiment of the present application, the pointer assembly includes a mounting plate arranged in the middle of the coupler, the extension direction of the mounting plate is perpendicular to the extension direction of the coupler, and magnetic clamps are provided at both ends of the bottom surface of the mounting plate, and the two magnetic clamps are close to each other and respectively fit with the two side walls of the coupler.

[0011] According to the technical solution provided in the embodiment of the present application, the measuring device further includes a base plate, a fixing assembly is provided in the middle of the base plate, and the fixing assembly is used to clamp the tail frame.

[0012] According to the technical solution provided in the embodiment of the present application, the fixing assembly includes:

[0013] a vertical plate, disposed in the middle of the base plate, with its normal direction being the second direction;

[0014] Two clamping plates are respectively arranged on both sides of the tail frame along the first direction, and the bottom ends of the two clamping plates are each provided with a limiting slot, and the inner wall of the limiting slot is in contact with the outer surface of the top of the vertical plate;

[0015] The first clamping structure includes a plurality of shaft seats arranged along the first direction at the top end of the vertical plate, and an adjusting shaft is rotatably connected in the middle of each shaft seat. Two externally threaded sleeves are provided on the outer sleeve of the adjusting shaft, and the two externally threaded sleeves are respectively threadedly connected to the two clamping plates to drive the two clamping plates to move along the first direction. The first direction and the second direction are perpendicular to each other.

[0016] According to the technical solution provided in the embodiment of the present application, the fixing assembly also includes a second clamping structure, which includes two internally threaded barrels respectively arranged at the top ends of the two clamping plates, the thread rotation directions of the two internally threaded barrels are opposite, and the internal threads of the two internally threaded barrels are connected by a stud.

[0017] According to the technical solution provided in the embodiment of the present application, an adjustment ring is installed at one end of the stud, and a crank is provided at one end of the adjustment shaft.

[0018] According to the technical solution provided in the embodiment of the present application, the measuring device further includes a pressure measuring component, which is used to measure the pressure exerted on the simulated pin when the coupler and the tail frame are compressed and pulled.

[0019] According to the technical solution provided in the embodiment of the present application, the pressure measuring assembly includes several pressure gauge bodies arranged on the substrate, each of the pressure gauge bodies is connected to a pressure gauge probe at one end, the top and bottom ends of the analog pin are provided with an embedding groove close to the indicator needle side, and the middle part of the analog pin is also provided with an embedding groove away from the indicator needle side, and each of the pressure gauge probes is respectively arranged in each of the embedding grooves.

[0020] According to the technical solution provided in the embodiment of the present application, a positioning through-hole is provided through the middle of the simulated pin, a positioning post is provided at the top edge of the substrate, and the simulated pin is positioned by passing through the positioning through-hole through the positioning post.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] The utility model is provided with a scale assembly and a pointer assembly. The axis of the arc-shaped scale plate of the scale assembly coincides with the axis of the analog pin. The indicator needle of the pointer assembly is located in the middle position of the coupler and its extension direction is parallel to the extension direction of the coupler. Therefore, when measuring, the value pointed by the indicator needle can be directly read, and the free rotation angle of the coupler and the tail frame can be obtained quickly and accurately without the need to measure other parameters. The angle parameter is more accurate.

[0023] In addition, a fixing assembly is provided, which uses two clamping plates to clamp the tail frame to ensure the stability of the tail frame during the measurement process. The fixing assembly includes a first clamping structure and a second clamping structure to achieve initial fixation and secondary fixation, thereby improving the stability of the fixation and ensuring that the tail frame will not shake during the measurement process.

[0024] Furthermore, a pressure measuring assembly is provided. During the measurement process, the coupler is pulled, and the pressure value of the simulated pin is displayed on the pressure gauge body through the pressure gauge probe provided on the simulated pin, so that the user can measure the pressure between the coupler and the tail frame. Based on the measured value, the user can simulate the load of the coupler, so that the measurement of the free turning angle is more in line with the actual situation and the measured value is more accurate. Furthermore, the pressure measuring assembly also includes positioning holes and positioning columns to realize the positioning of the simulated pin, ensure the accurate position of the pressure gauge probe, and avoid the pressure measurement deviation caused by the position offset of the pressure gauge probe.

[0025] It should be understood that the contents described in the summary of the utility model are not intended to limit the key or important features of the embodiments of the utility model, nor are they intended to limit the scope of the utility model. Other features of the utility model will become easier to understand through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments made with reference to the following drawings:

[0027] Figure 1 A schematic structural diagram of a device for measuring the free rotation angle and pressure of a coupler and a tail frame provided in an embodiment of the present application;

[0028] Figure 2 A schematic cross-sectional view of a device for measuring the free rotation angle and pressure of a coupler and a tail frame provided in an embodiment of the present application;

[0029] Figure 3 A schematic cross-sectional view of a fixed component in a device for measuring the free rotation angle and pressure of a coupler and a tail frame provided in an embodiment of the present application;

[0030] Figure 4 Schematic diagram of the connection structure of the scale assembly and the simulation pin in a device for measuring the free rotation angle and pressure of a coupler and tail frame provided in an embodiment of the present application.

[0031] Numbers in the figure:

[0032] 1. Coupler;

[0033] 2. Tail frame;

[0034] 3. Simulated pin; 31. Limiting collar;

[0035] 4. Scale assembly; 41. Arc scale plate; 42. U-shaped card; 43. Slot;

[0036] 5. Pointer assembly; 51. Mounting plate; 52. Center column; 53. Indicator needle; 54. Magnetic clamp;

[0037] 6. Substrate;

[0038] 7. Fixing assembly; 71. Vertical plate; 72. Clamping plate; 73. Shaft seat; 74. Adjusting shaft; 75. Externally threaded sleeve; 76. Internally threaded sleeve; 77. Stud; 78. Limiting slot; 79. Crank handle; 710. Adjusting ring;

[0039] 8. Pressure measuring assembly; 81. Pressure gauge body; 82. Pressure gauge probe; 83. Fitting groove; 84. Positioning column; 85. Positioning through hole. DETAILED DESCRIPTION

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are intended only to illustrate the relevant utility model and are not intended to limit the scope of the utility model. It should also be noted that, for ease of description, only the portions relevant to the utility model are shown in the accompanying drawings.

[0041] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] Please refer to Figures 1 to 4 The embodiment of the present utility model provides a device for measuring the free rotation angle and pressure of a coupler and a tail frame, which is used to measure the free rotation angle between a coupler 1 and a tail frame 2, comprising:

[0043] The simulated pin 3 is rotatably connected between the coupler 1 and the tail frame 2; wherein the coupler 1 and the tail frame 2 have mounting holes between adjacent ends, and the simulated pin 3 is inserted into each mounting hole to achieve the rotational connection between the coupler 1 and the tail frame 2;

[0044] The scale assembly 4 includes an arc-shaped scale plate 41 provided on the top of the simulated pin 3. The axis of the arc-shaped scale plate 41 coincides with the axis of the simulated pin 3. The top surface of the arc-shaped scale plate 41 is provided with an angle scale line near the edge of the coupler 1.

[0045] The pointer assembly 5 includes a center column 52 provided at the center of the coupler 1 , and an indicator needle 53 is provided at the top of the center column 52 . The extending direction of the indicator needle 53 is parallel to the extending direction of the coupler 1 .

[0046] like Figure 1 and Figure 4 As shown, since the axis of the arc-shaped scale plate 41 of the scale assembly 4 coincides with the axis of the analog pin 3, the indicator needle 53 of the pointer assembly 5 is located in the middle position of the coupler 1, and its extension direction is parallel to the extension direction of the coupler 1. Therefore, when measuring, the value pointed by the indicator needle 53 can be directly read, and the free rotation angle of the coupler 1 and the tail frame 2 can be obtained quickly and accurately without the need to measure other parameters. The angle parameter is more accurate.

[0047] In some embodiments, a limiting collar 31 is provided on the bottom end of the simulated pin 3, a slot 43 is provided on the top end of the simulated pin 3, a U-shaped card 42 is inserted into the slot 43, and an arc-shaped scale plate 41 is provided on the top end of the U-shaped card 42;

[0048] like Figure 1 and Figure 4As shown, the bottom end of the U-shaped card 42 abuts against the top end of the tail frame 2, and the top end of the limiting ring 31 abuts against the bottom end of the tail frame 2, limiting the position of the simulation pin 3 to prevent the simulation pin 3 from falling from the connection. In addition, the U-shaped card 42 is placed horizontally, and it has two cross bars. The arc-shaped dial 41 is provided at the top end of the upper cross bar, and the cross bar located below is inserted into the slot 43 to complete the installation of the U-shaped card 42. Optionally, when the inner wall of the U-shaped card 42 abuts against the outer side surface of the simulation pin 3, the installation of the U-shaped card 42 is completed, and the positioning of the arc-shaped dial 41 is realized, that is, the cross bar below the U-shaped card 42 is inserted into the slot 43, and moves along the slot 43 until it stops and the installation positioning is completed.

[0049] In some embodiments, the pointer assembly 5 includes a mounting plate 51 disposed in the middle of the coupler 1. The mounting plate 51 extends in a direction perpendicular to the extension direction of the coupler 1. Magnetic clamps 54 are provided at both ends of the bottom surface of the mounting plate 51. The two magnetic clamps 54 are close to each other and respectively adhere to the two side walls of the coupler 1.

[0050] like Figure 1 As shown, the center column 52 is arranged on the mounting plate 51, and the coupler 1 is clamped by two magnetic clamps 54, so that the center column 52 is installed in the middle position of the coupler 1. The magnetic clamps 54 improve the stability after installation and reduce the factors causing the shaking of the pointer assembly 5. Furthermore, it will not interfere with the removal of the pointer assembly 5 for the measurement of the next coupler 1.

[0051] In some embodiments, the measuring device further includes a base plate 6 , a fixing assembly 7 is provided in the middle of the base plate 6 , and the fixing assembly 7 is used to clamp the tail frame 2 ;

[0052] like Figure 1 、 Figure 2 and Figure 3 As shown, the tail frame 2 is clamped by the fixing assembly 7. When the measuring device is used, no other clamps are needed, making the measuring device more convenient to use.

[0053] In some embodiments, the fixing assembly 7 includes:

[0054] The vertical plate 71 is provided in the middle of the base plate 6, and its normal direction is the second direction;

[0055] Two clamping plates 72 are respectively provided on both sides of the tail frame 2 along the first direction. The bottom ends of the two clamping plates 72 are provided with a limiting slot 78, and the inner wall of the limiting slot 78 is in contact with the outer surface of the top of the vertical plate 71;

[0056] The first clamping structure includes a plurality of shaft seats 73 arranged along a first direction at the top of the vertical plate 71. An adjusting shaft 74 is rotatably connected to the middle of each shaft seat 73. Two externally threaded sleeves 75 are provided on the outer sleeve of the adjusting shaft 74. The two externally threaded sleeves 75 are respectively threadedly connected to the two clamping plates 72, driving the two clamping plates 72 to move along the first direction. The first direction and the second direction are perpendicular to each other.

[0057] like Figure 1 、 Figure 2 and Figure 3 As shown, the external threads of the two externally threaded sleeves 75 rotate in opposite directions, and the two clamping plates 72 are penetrated by internally threaded holes, which are respectively connected to the threads of the corresponding externally threaded sleeves 75. When clamping, the tail frame 2 is placed above the adjusting shaft 74 and the adjusting shaft 74 is rotated. If there is no restriction, the clamping plates 72 will rotate along with it. However, in this embodiment, the threaded action of the externally threaded sleeves 75 and the internally threaded holes is combined with the vertical plate 71 provided in the limiting slot 78 to limit the rotation of the clamping plates 72, so that the two clamping plates 72 are close to each other and abut against the two end faces of the tail frame 2 to achieve preliminary fixation.

[0058] In some embodiments, the fixing assembly 7 further includes a second clamping structure, which includes two internally threaded barrels 76 respectively provided at the top ends of the two clamping plates 72. The threads of the two internally threaded barrels 76 are in opposite directions, and a stud 77 is connected to the internal threads of the two internally threaded barrels 76.

[0059] like Figure 2 and Figure 3 As shown, after the initial fixation, the stud 77 is rotated. Since the threads of the two internally threaded tubes 76 have opposite rotation directions, the two internally threaded tubes 76 and the corresponding clamping plates 72 can be driven closer to each other, further abutting the two end surfaces of the tail frame 2, achieving secondary fixation, improving the clamping effect, and ensuring the stable installation of the tail frame 2. Optionally, the outer wall of the internally threaded tube 76 abuts the inner wall of the tail frame 2. When the coupler 1 is pulled, the internally threaded tube 76 limits the movement of the tail frame 2, thereby improving the stability of the tail frame 2.

[0060] In some embodiments, an adjustment ring 710 is mounted on one end of the stud 77, and a crank 79 is provided on one end of the adjustment shaft 74; Figure 1 and Figure 3 As shown, rotating the adjustment ring 710 drives the stud 77 to rotate, and the adjustment shaft 74 can also be driven to rotate by the crank 79, thereby improving the convenience of rotation and solving the problem that it is inconvenient for the user to rotate only the stud 77 or the adjustment shaft 74.

[0061] In some embodiments, the measuring device further includes a pressure measuring assembly 8, which is used to measure the pressure exerted on the simulated pin 3 when the coupler 1 and the tail frame 2 are compressed and pulled;

[0062] like Figure 1 and Figure 2As shown, the user measures the pressure between the coupler 1 and the tail frame 2. Based on the measured value, the user can simulate the load of the coupler 1, so that the measurement of the free rotation angle is more consistent with the actual situation and the measured value is more accurate.

[0063] In some embodiments, the pressure measuring assembly 8 includes a plurality of pressure gauge bodies 81 disposed on the substrate 6. Each pressure gauge body 81 has a pressure gauge probe 82 connected to one end. The top and bottom ends of the simulated pin 3, near the indicator needle 53, are provided with an embedding groove 83. The middle portion of the simulated pin 3, away from the indicator needle 53, is also provided with an embedding groove 83. Each pressure gauge probe 82 is respectively disposed in each embedding groove 83.

[0064] like Figure 1 and Figure 2 As shown, since the coupler 1 will be pulled away from the tail frame 2 during the simulation test, four engaging grooves 83 are provided. The engaging grooves 83 at the top and bottom ends correspond to the mounting hole positions of the tail frame 2, and are oriented in the direction of pulling the coupler 1. Therefore, the pressure gauge probes 82 provided inside the two engaging grooves 83 abut against the tail frame 2 to measure the pressure of the tail frame 2 on the simulated pin 3. Similarly, the two engaging grooves 83 in the middle correspond to the mounting holes of the coupler 1, and are oriented opposite to the other engaging grooves 83. The pressure gauge probes 82 provided inside the two engaging grooves 83 abut against the coupler 1 to measure the pressure of the coupler 1 on the simulated pin 3. Two pressure gauges are provided for measuring both pressures to avoid the situation where only one pressure gauge is prone to deviation, thereby improving the accuracy of the measurement.

[0065] In some embodiments, a positioning hole 85 is provided through the middle of the simulated pin 3, and a positioning post 84 is provided on the top edge of the substrate 6. The simulated pin 3 is positioned by passing through the positioning hole 85 via the positioning post 84;

[0066] like Figure 2 and Figure 4As shown, by cooperating with the positioning post 84 and the positioning through hole 85, the simulation pin 3 is positioned in the vertical direction and the rotation of the simulation pin 3 is restricted. When in use, it is only necessary to move the simulation pin 3 upwards and then fit the coupler 1 and the tail frame 2 onto the simulation pin 3 through the mounting hole. The vertical movement along the positioning post 84 can ensure the stability of the simulation pin 3, avoid the position deviation of each fitting groove 83, and ensure the accuracy of pressure measurement. Optionally, a receiving groove corresponding to the magnetic clamp 54 is provided at the top of the base plate 6. After the measurement is completed, The simulation pin 3 can be placed on the top surface of the substrate 6 by passing the positioning post 84 through the positioning hole 85, and the pointer assembly 5 can be placed on the top surface of the substrate 6 by placing it in the receiving groove through the magnetic clamp 54, so as to finally realize the storage of the entire device and avoid the loss of parts; further optionally, the cross-section of the positioning post 84 is formed by a combination of a semicircle and a triangle, the diameter edge line of the semicircle coincides with one edge line of the triangle, and the outer edge of the cross-section of the positioning post 84 is matched with the inner edge of the cross-section of the positioning hole 85, so that the simulation pin 3 will not rotate when stored.

[0067] In this specification, the terms "connect," "install," and "fix" should be understood broadly. For example, "connect" can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0068] Throughout this specification, terms such as "one embodiment" or "some embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0069] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A device for measuring the free rotation angle and pressure of a coupler and a tail frame, used for measuring the free rotation angle between a coupler (1) and a tail frame (2), characterized in that: include: A simulated pin (3) is rotatably connected between the coupler (1) and the tail frame (2); A scale assembly (4) includes an arc-shaped scale plate (41) provided on the top of the simulated pin (3), wherein the axis of the arc-shaped scale plate (41) coincides with the axis of the simulated pin (3), and an angle scale line is provided on the top surface of the arc-shaped scale plate (41) near the edge of the coupler (1); The pointer assembly (5) comprises a center column (52) arranged at the center position of the coupler (1), an indicator needle (53) is provided at the top end of the center column (52), and the extending direction of the indicator needle (53) is parallel to the extending direction of the coupler (1).

2. The device for measuring the free rotation angle and pressure of the coupler and tail frame according to claim 1, characterized in that: The bottom end of the simulated pin (3) is sleeved with a limiting collar (31), the top end of the simulated pin (3) is provided with a slot (43), a U-shaped card (42) is inserted into the slot (43), and the arc-shaped scale plate (41) is arranged on the top end of the U-shaped card (42).

3. The device for measuring the free rotation angle and pressure of the coupler and tail frame according to claim 2, characterized in that: The pointer assembly (5) comprises a mounting plate (51) arranged in the middle of the coupler (1), the extension direction of the mounting plate (51) being perpendicular to the extension direction of the coupler (1), and magnetic clamping blocks (54) being provided at both ends of the bottom surface of the mounting plate (51), the two magnetic clamping blocks (54) being close to each other and respectively fitting with the two side walls of the coupler (1).

4. The device for measuring the free rotation angle and pressure of the coupler and tail frame according to claim 1, characterized in that: The measuring device further comprises a base plate (6), a fixing assembly (7) is provided in the middle of the base plate (6), and the fixing assembly (7) is used for clamping the tail frame (2).

5. The device for measuring the free rotation angle and pressure of the coupler and tail frame according to claim 4, characterized in that: The fixing assembly (7) comprises: A vertical plate (71) is provided in the middle of the base plate (6), and its normal direction is the second direction; Two clamping plates (72) are respectively arranged on both sides of the tail frame (2) along the first direction, and the bottom ends of the two clamping plates (72) are each provided with a limiting slot (78), and the inner wall of the limiting slot (78) is in contact with the outer surface of the top of the vertical plate (71); The first clamping structure includes a plurality of shaft seats (73) arranged along a first direction at the top end of the vertical plate (71), and an adjusting shaft (74) is rotatably connected to the middle part of each shaft seat (73). The adjusting shaft (74) is provided with two external threaded sleeves (75) on the outer sleeve, and the two external threaded sleeves (75) are respectively threadedly connected to the two clamping plates (72) to drive the two clamping plates (72) to move along the first direction, and the first direction and the second direction are perpendicular to each other.

6. The device for measuring the free rotation angle and pressure of the coupler and tail frame according to claim 5, characterized in that: The fixing assembly (7) further includes a second clamping structure, which includes two internally threaded cylinders (76) respectively provided at the top ends of the two clamping plates (72), wherein the threads of the two internally threaded cylinders (76) are in opposite directions, and the internal threads of the two internally threaded cylinders (76) are connected to a stud (77).

7. The device for measuring the free rotation angle and pressure of the coupler and tail frame according to claim 6, characterized in that: An adjusting ring (710) is installed at one end of the stud (77), and a crank (79) is provided at one end of the adjusting shaft (74).

8. The device for measuring the free rotation angle and pressure of the coupler and tail frame according to claim 4, characterized in that: The measuring device further comprises a pressure measuring assembly (8), and the pressure measuring assembly (8) is used to measure the pressure exerted on the simulation pin (3) when the coupler (1) and the tail frame (2) are pressed and pulled.

9. The device for measuring the free rotation angle and pressure of the coupler and tail frame according to claim 8, characterized in that: The pressure measuring assembly (8) includes a plurality of pressure gauge bodies (81) arranged on the substrate (6), each of the pressure gauge bodies (81) is connected to a pressure gauge probe (82) at one end, the top and bottom ends of the simulation pin (3) are provided with an embedding groove (83) close to the indicator needle (53), and the middle part of the simulation pin (3) is also provided with an embedding groove (83) away from the indicator needle (53), and each of the pressure gauge probes (82) is respectively arranged in each of the embedding grooves (83).

10. The device for measuring the free rotation angle and pressure of the coupler and tail frame according to claim 9, characterized in that: A positioning through hole (85) is provided through the middle of the simulated pin (3), and a positioning column (84) is provided on the top edge of the base plate (6). The simulated pin (3) is positioned by passing through the positioning through hole (85) via the positioning column (84).

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