Centering mechanism for rod and push-pull force testing device for rod

Abstract

The utility model relates to the technical field of rod-shaped structure centering, and discloses a rod-used centering mechanism and a rod-used push-pull force testing device, the rod-used centering mechanism is used for assisting coaxial butt joint of two rod-shaped structures, the two rod-shaped structures are respectively a first rod and a second rod, the rod-used centering mechanism comprises a sensor carrier and a coaxial assembly, a tilt angle sensor parallel to the axis of the sensor carrying seat is arranged on the sensor carrying seat, one end of the sensor carrying seat is detachably and coaxially connected with the connecting end of the first rod, the tilt angle sensor can return to zero, and the other end of the sensor carrying seat is detachably and coaxially connected with the connecting end of the second rod. The second rod can be stressed to swing until the tilt angle sensor returns to zero for the second time; the coaxial assembly is detachably connected to the first rod and / or the second rod and used for indicating whether the first rod and the second rod are coaxial or not, and the first rod and / or the second rod can be stressed to horizontally move till the first rod and the second rod are coaxial. The device is simple in structure, wide in application range, capable of assisting two rods to be adjusted to be coaxial, time-saving and labor-saving, and high in butt joint coaxiality of the two rods.

Description

Technical Field

[0001] This utility model relates to the field of rod-shaped structure centering technology, and in particular to a rod centering mechanism and a rod push-pull force testing device. Background Technology

[0002] With the advancement of science and technology, the requirements for processing precision, installation precision, and alignment precision of various equipment or components are becoming increasingly stringent. For example, fields such as optics and mechanical welding demand high alignment precision. Similarly, in axial force testing, the coaxiality of the measured rod and the force-applying rod directly affects the accuracy of the tested structure. In the testing of friction force in dual valves, the coaxiality of the valve stem and the push-pull force directly affects the accuracy of the measured push-pull force, thus affecting the accuracy of the measured friction force. In existing technologies, the alignment of the two rods is typically measured after moving and docking them, followed by minor adjustments or the use of alignment sensors. However, during the process of adjusting the coaxial alignment of the two rods, it is difficult to precisely adjust the coaxiality to the preset precision.

[0003] Therefore, there is an urgent need for a rod centering mechanism and a rod push-pull force testing device to solve the above problems. Utility Model Content

[0004] Based on the above, the purpose of this utility model is to provide a rod centering mechanism and a rod push-pull force testing device, which has low cost, wide applicability, can assist two rods in adjusting to coaxiality, saves time and effort, and makes the coaxiality of the two rods high.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A rod alignment mechanism is provided to assist in the coaxial connection of two rod-shaped structures, wherein the two rod-shaped structures are a first rod and a second rod, and the rod alignment mechanism includes:

[0007] A sensor carrier is provided with an inclination sensor that is parallel to the axis of the sensor carrier. One end of the sensor carrier is detachably coaxially connected to the connection end of the first rod. The inclination sensor can be zeroed. The other end of the sensor carrier is detachably coaxially connected to the connection end of the second rod. The second rod can be swung under force until the inclination sensor returns to zero twice.

[0008] A coaxial assembly, detachably connected to the first rod and / or the second rod, is used to indicate whether the first rod and the second rod are coaxial, and the first rod and / or the second rod can be translated under force to make the first rod and the second rod coaxial.

[0009] As a preferred embodiment of a linkage centering mechanism, the coaxial assembly includes:

[0010] A coaxial fixture includes a first section and a second section that are coaxial. The outer dimensions of the first section are the same as those of the first rod, and the outer dimensions of the second section are the same as those of the second rod.

[0011] A coaxial sleeve is provided, on which a first dial indicator and a second dial indicator are circumferentially spaced and vertically arranged. The coaxial sleeve is detachably coaxially fitted onto the first section and spaced coaxially fitted onto the second section. The measuring rods of the first and second dial indicators abut against the outer periphery of the second section and can both be adjusted to zero. One end of the coaxial sleeve is detachably coaxially fitted onto the connecting end of the first rod, and the other end is detachably spaced onto the connecting end of the second rod. The measuring rods of the first and second dial indicators abut against the outer periphery of the connecting end of the second rod. The first rod and / or the second rod can be forcefully moved to the point where the first and second dial indicators are zeroed a second time.

[0012] As a preferred embodiment of a rod centering mechanism, the coaxial fixture further includes a third section, wherein when the first and second sections are fitted inside the coaxial sleeve, the third section abuts against one end of the coaxial sleeve.

[0013] As a preferred embodiment of a rod centering mechanism, one end of the coaxial sleeve is provided with a first limiting groove and a second limiting groove, and the outer periphery of the connecting end of the first rod is provided with a first limiting protrusion and a second limiting protrusion. The first limiting groove and the second limiting groove can simultaneously engage with the first limiting protrusion and the second limiting protrusion for limiting, respectively.

[0014] As a preferred embodiment of the rod centering mechanism, one end of the sensor carrier is provided with a first sleeve hole, and the other end is provided with a second sleeve hole. The axes of the first sleeve hole and the second sleeve hole coincide. The connecting end of the first rod can be fitted into the first sleeve hole, and the shape and size of the outer periphery of the connecting end of the first rod are adapted to the shape and size of the first sleeve hole. The connecting end of the second rod can be fitted into the second sleeve hole, and the shape and size of the outer periphery of the connecting end of the second rod are adapted to the shape and size of the second sleeve hole.

[0015] As a preferred embodiment of a rod-type centering mechanism, the outer wall of the sensor carrier has a planar mounting surface, which is parallel to the axis of the sensor carrier, and the tilt sensor is detachably mounted on the mounting surface.

[0016] As a preferred embodiment of a lever alignment mechanism, the lever alignment mechanism further includes:

[0017] An angle adjustment assembly includes a fixed base, a pitch frame, and a yaw rotary table. The pitch frame is rotatably mounted on the fixed base in the Y direction, and the yaw rotary table is rotatably mounted on the pitch frame along its axis.

[0018] Mounting base, the second rod is detachably connected to the mounting base, the mounting base is detachably connected to the yaw rotary table, and the second rod can swing with the rotation of the pitch frame and the yaw rotary table.

[0019] As a preferred embodiment of the rod centering mechanism, the rod centering mechanism further includes a push-pull mechanism, which includes an adjustment component and an X-direction drive source. The X-direction drive source is adjustablely disposed on the adjustment component along the Y and Z directions. The first rod is connected to the drive end of the X-direction drive source along its length direction, and the X-direction drive source can drive the first rod to move along the X direction.

[0020] As a preferred solution for a lever-type centering mechanism, it also includes

[0021] The first rod sleeve has one end for detachable coaxial connection to the end of the first rod facing the second rod, forming the connecting end of the first rod.

[0022] The second rod sleeve has one end for detachable coaxial connection to the end of the second rod facing the first rod, forming the connection end of the second rod. The second rod sleeve and the first rod sleeve are detachably connected.

[0023] A rod push-pull force testing device includes the rod centering mechanism described in any of the above technical solutions.

[0024] The beneficial effects of this utility model are as follows:

[0025] This invention provides a rod alignment mechanism. By coaxially connecting a sensor carrier to the connecting end of a first rod, and then zeroing the tilt sensor, the overall angle of the tilt sensor is made the same as the angle of the line containing the first rod. The sensor carrier is then removed and connected to the connecting end of a second rod. The tilt sensor detects the tilt angle of the second rod. By adjusting the angle of the second rod until the tilt sensor displays zero, the second rod is parallel to the first rod. The first rod and / or the second rod are then moved according to the indication of the coaxial assembly until the coaxial assembly indicates that the first and second rods are coaxial, thus achieving coaxiality between the first and second rods and ensuring the alignment accuracy. This mechanism is suitable not only for applications requiring high coaxiality of rod-shaped structures but also for axial force testing. This rod alignment mechanism has a simple structure and operation, and high alignment efficiency.

[0026] This utility model also provides a push-pull force testing device for a rod, including the above-mentioned rod centering mechanism, which has high push-pull force testing accuracy and can effectively reduce the influence of lateral force on the test results. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the sensor carrier structure from one perspective provided in an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the sensor carrier from another perspective provided in an embodiment of the present invention;

[0030] Figure 3 This is a side view of a sensor carrier mounting an angle sensor from one perspective, provided in an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the first rod sleeve provided in this embodiment of the utility model;

[0032] Figure 5 This is a schematic diagram of the structure of the second rod sleeve provided in this embodiment of the utility model;

[0033] Figure 6 This is a cross-sectional view of the sensor carrier sleeved on the first rod sleeve provided in this embodiment of the utility model;

[0034] Figure 7 This is a cross-sectional view of the sensor carrier sleeve on the second rod sleeve provided in this embodiment of the utility model;

[0035] Figure 8 This is a schematic diagram of the coaxial fixture provided in this embodiment of the utility model;

[0036] Figure 9 This is a schematic diagram of the structure of the coaxial sleeve provided in this embodiment of the utility model;

[0037] Figure 10 This is a side view of the coaxial sleeve equipped with the first and second dial indicators provided in this embodiment of the utility model;

[0038] Figure 11 This is a cross-sectional view of the coaxial sleeve fitted onto the coaxial fixture according to an embodiment of the present invention;

[0039] Figure 12 This is a cross-sectional view of the coaxial sleeve provided in this embodiment of the utility model, fitted onto the first rod sleeve and the second rod sleeve;

[0040] Figure 13 This is a schematic diagram of the structure of the connecting sleeve provided in an embodiment of the present utility model;

[0041] Figure 14 This is a schematic diagram of the structure of the rod push-pull force testing device provided in one view according to an embodiment of the present invention;

[0042] Figure 15 This is a side view of the push-pull force testing device for a rod provided in this embodiment of the utility model. Figure 1 (The first and second poles are not connected);

[0043] Figure 16 This is a top view of the push-pull force testing device for rods provided in this embodiment of the utility model;

[0044] Figure 17 This is a schematic diagram of the push-pull force testing device for a rod from another perspective, provided in an embodiment of this utility model;

[0045] Figure 18 This is a partial structural schematic diagram of the angle adjustment component provided in this embodiment of the utility model;

[0046] Figure 19 This is a schematic diagram of the structure of the fixing base provided in an embodiment of the present utility model;

[0047] Figure 20 This is a side view of the push-pull force testing device for a rod provided in this embodiment of the utility model. Figure 2 (Connecting the first and second poles.)

[0048] In the picture:

[0049] 100, First lever; 1001, First limiting protrusion; 1002, Second limiting protrusion; 200, Second lever;

[0050] 1. Sensor carrier; 101. First sleeve hole; 102. Second sleeve hole; 2. Tilt sensor; 3. Coaxial assembly; 31. Coaxial fixture; 311. First section; 312. Second section; 313. Third section; 32. Coaxial sleeve; 321. First dial indicator; 322. Second dial indicator; 3201. First limiting groove; 3202. Second limiting groove; 4. First rod sleeve; 41. First connecting screw; 5. Second rod sleeve; 51. Second connecting screw; 6. Connecting sleeve;

[0051] 7. Angle adjustment assembly; 71. Mounting base; 72. Pitch frame; 73. Pitch drive source; 74. Locking component; 741. Locking pin; 742. Limiting head; 743. Offset fork; 75. Yaw drive source; 76. Yaw rotary table;

[0052] 8. Push-pull mechanism; 81. Adjustment component; 811. Z-axis lifting mechanism; 8111. Support frame; 8112. Moving frame; 8113. Z-axis drive source; 812. Y-axis moving mechanism; 8121. Y-axis drive source; 8122. Y-axis moving plate; 82. X-axis drive source;

[0053] 9. Mounting bracket;

[0054] 10. Force sensor. Detailed Implementation

[0055] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0056] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0057] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0058] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used solely for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "first" and "second" are merely used for descriptive distinction and have no special meaning.

[0059] like Figures 1 to 20As shown, this embodiment provides a rod alignment mechanism for assisting the coaxial docking of two rod-shaped structures, namely a first rod 100 and a second rod 200. The cross-sections of the first rod 100 and the second rod 200 can be, but are not limited to, circular or rectangular shapes. The following description uses cylindrical first rods 100 and 200 as an example. Specifically, the rod alignment mechanism includes a sensor carrier 1 and a coaxial sleeve 32. An inclination sensor 2 parallel to the axis of the sensor carrier 1 is mounted on the sensor carrier 1. One end of the sensor carrier 1 is detachably coaxially connected to the connecting end of the first rod 100, and the inclination sensor 2 can return to zero. The other end of the sensor carrier 1 is detachably coaxially connected to the connecting end of the second rod 200, and the second rod 200 can be swung under force until the inclination sensor 2 returns to zero a second time. Preferably, the inclination sensor 2 is a triaxial inclination sensor 2. Before aligning the first rod 100 and the second rod 200, their orientations need to be adjusted to ensure they are parallel to each other. Then, their coaxiality needs to be adjusted to ensure they are aligned on a straight line, thus improving the subsequent alignment accuracy, such as enhancing the accuracy of push-pull force tests. When aligning the first rod 100 and the second rod 200, first, coaxially connect the sensor carrier 1 to the connecting end of the first rod 100. Then, zero the tilt sensor 2, ensuring its overall angle is the same as the angle of the line containing the first rod 100. Remove the sensor carrier 1 and connect it to the connecting end of the second rod 200. The tilt sensor 2 will then detect the tilt angle of the second rod 200. By adjusting the angle of the second rod 200 until it reads zero, the second rod 200 is parallel to the first rod 100. For example, before adjusting the first rod 100 and the second rod 200 to be parallel, with the extension direction of the first rod 100 as the X direction, the first rod 100 and the second rod 200 are set opposite each other. After connecting the sensor carrier 1 to the connecting end of the second rod 200, the second rod 200 is adjusted around the Y-axis and around the Z-axis to bring the tilt sensor 2 to zero, thus achieving spatial parallelism between the second rod 200 and the first rod 100. By using the sensor carrier 1 with the tilt sensor 2 mounted, the relative spatial angle between the first rod 100 and the second rod 200 can be quickly and accurately located, making the first rod 100 and the second rod 200 spatially parallel. The structure and operation are simple, and the centering efficiency is high.

[0060] In this embodiment, as Figures 1 to 3As shown, the outer wall of the sensor carrier 1 has a planar mounting surface, which is parallel to the axis of the sensor carrier 1. The tilt sensor 2 is detachably mounted on the mounting surface. The planar mounting surface facilitates stable mounting of the tilt sensor 2 and ensures that the tilt sensor 2, after installation, has the same angle as the axis of the sensor carrier 1, guaranteeing measurement accuracy. For example, the tilt sensor 2 is detachably connected to the mounting surface by several bolts, resulting in high structural strength and good stability.

[0061] Specifically, one end of the sensor carrier 1 is provided with a first sleeve hole 101, and the other end is provided with a second sleeve hole 102. The axes of the first sleeve hole 101 and the second sleeve hole 102 coincide. The connecting end of the first rod 100 can be fitted into the first sleeve hole 101, and the shape and size of the outer periphery of the connecting end of the first rod 100 are adapted to the shape and size of the first sleeve hole 101. The connecting end of the second rod 200 can be fitted into the second sleeve hole 102, and the shape and size of the outer periphery of the connecting end of the second rod 200 are adapted to the shape and size of the second sleeve hole 102. Through this fitting, the sensor carrier 1 and the first rod 100, as well as the sensor carrier 1 and the second rod 200, can be quickly and conveniently coaxially connected, improving work efficiency.

[0062] Furthermore, the rod alignment mechanism also includes a coaxial assembly 3, which is detachably connected to the first rod 100. The coaxial assembly 3 indicates whether the first rod 100 and the second rod 200 are coaxial, allowing the first rod 100 and / or the second rod 200 to be translated under force until they are coaxial. After adjusting the second rod 200 and the first rod 100 to be parallel, the first rod 100 and / or the second rod 200 are moved parallel to each other along the Y and Z directions according to the indication of the coaxial assembly 3 until the coaxial assembly 3 indicates that the first rod 100 and the second rod 200 are coaxial. This achieves the coaxiality of the first rod 100 and the second rod 200, ensuring the docking accuracy of the first rod 100 and the second rod 200. This mechanism is suitable not only for applications requiring high coaxiality of rod-shaped structures but also for axial force testing. The rod alignment mechanism has a simple structure and operation, and high alignment efficiency.

[0063] In this embodiment, as Figures 8 to 10As shown, the coaxial assembly 3 includes a coaxial fixture 31 and a coaxial sleeve 32. The coaxial fixture 31 includes a first section 311 and a second section 312, which are coaxial. The outer dimensions of the first section 311 are the same as those of the first rod 100, and the outer dimensions of the second section 312 are the same as those of the second rod 200. A first dial indicator 321 and a second dial indicator 322 are circumferentially spaced and vertically arranged on the coaxial sleeve 32. The extension lines of the measuring rods of the first dial indicator 321 and the second dial indicator 322 both pass through the axis of the coaxial sleeve 32. The coaxial sleeve 32 is detachably coaxially fitted onto the... The first segment 311 and the spacer coaxially sleeved in the second segment 312, the measuring rods of the first dial indicator 321 and the second dial indicator 322 abut against the outer periphery of the second segment 312 and can both be adjusted to zero, one end of the coaxial sleeve 32 is detachably coaxially sleeved on the connecting end of the first rod 100, and the other end is detachably spaced on the connecting end of the second rod 200, the measuring rods of the first dial indicator 321 and the second dial indicator 322 abut against the outer periphery of the connecting end of the second rod 200, the first rod 100 and / or the second rod 200 can be forcefully moved to the second zeroing of the first dial indicator 321 and the second dial indicator 322. In normal operation (when no object is being measured), the measuring rods of dial indicators 321 and 322 will extend directly to their maximum range. Before coaxial adjustment, after placing the coaxial sleeve 32 on the coaxial fixture 31, zero the first and second dial indicators 321 and 322. After removing the coaxial sleeve 32, the measuring rods of the first and second dial indicators 321 and 322 will automatically reset, and the data displayed on the first and second dial indicators 321 and 322 will be negative. Then, the coaxial sleeve 32 is placed on the second rod 200. At this time, the end of the measuring rod of the first dial indicator 321 abuts against the outer peripheral wall of the second rod 200 and / or the second dial indicator. The end of the measuring rod of 322 abuts against the outer peripheral wall of the second rod 200. The measuring rods of the first dial indicator 321 and / or the second dial indicator 322 are compressed under force. The data displayed on the first dial indicator 321 and / or the second dial indicator 322 is the deviation value of the first segment 311 and the second rod 200. Then, the first rod 100 is moved so that the first rod 100 is fitted into the other end of the coaxial sleeve 32. The outer wall of the first rod 100 contacts the inner wall of the coaxial sleeve 32. The first rod 100 and / or the second rod 200 are translated until the data displayed on the first dial indicator 321 and the second dial indicator 322 both return to zero twice, which means that the second rod 200 and the first rod 100 have reached coaxiality. The first dial indicator 321 and the second dial indicator 322 have a scale division of 0.01 mm. When the first dial indicator 321 and the second dial indicator 322 are zeroed, it can be determined that the coaxiality of the second rod 200 and the first rod 100 is less than 0.1 mm.

[0064] Preferably, the coaxial fixture 31 further includes a third section 313. When the first section 311 and the second section 312 are fitted inside the coaxial sleeve 32, the third section 313 abuts against one end of the coaxial sleeve 32. By providing the third section 313, it is convenient to limit the coaxial fixture 31 and the coaxial sleeve 32, and it is also convenient to assemble and disassemble the coaxial fixture 31 and the coaxial sleeve 32.

[0065] More preferably, one end of the coaxial sleeve 32 is provided with a first limiting groove 3201 and a second limiting groove 3202, and the outer periphery of the connecting end of the first rod 100 is provided with a first limiting protrusion 1001 and a second limiting protrusion 1002. The first limiting groove 3201 and the second limiting groove 3202 can simultaneously engage with the first limiting protrusion 1001 and the second limiting protrusion 1002 respectively. When the coaxial sleeve 32 and the first rod 100 are sleeved, the first limiting groove 3201 and the second limiting groove 3202 engage with the first limiting protrusion 1001 and the second limiting protrusion 1002, making the relative position of the coaxial sleeve 32 and the first rod 100 relatively stable, which plays a role in limiting and stabilizing, effectively preventing the coaxial sleeve 32 from rotating relative to the first rod 100, and ensuring alignment accuracy.

[0066] In another embodiment, the coaxial assembly 3 includes a centering device, which comprises a laser emitter and a receiving target. One of the laser emitter and the receiving target is detachably connected to the first rod 100, and the other is detachably connected to the second rod 200. By receiving the laser emitted by the laser emitter through the receiving target, the concentricity of the first rod 100 and the second rod 200 can be obtained. By translating the first rod 100 and / or the second rod 200 until the coaxiality reaches a preset accuracy, for example, when the coaxiality is less than 0.1 mm, the centering is completed. By first adjusting the spatial parallelism of the first rod 100 and the second rod 200, it is easier to adjust the coaxiality subsequently through the coaxial assembly 3, thereby improving the centering accuracy.

[0067] Furthermore, such as Figures 4 to 12As shown, the rod centering mechanism also includes a first rod sleeve 4 and a second rod sleeve 5. One end of the first rod sleeve 4 is used to detachably and coaxially connect the end of the first rod 100 facing the second rod 200 to form the connecting end of the first rod 100, for example, by threading it onto the first rod 100. One end of the second rod sleeve 5 is used to detachably and coaxially connect the end of the second rod 200 facing the first rod 100 to form the connecting end of the second rod 200, for example, by threading it onto the second rod 200. By setting the first sleeve 4 and the second sleeve 5, the connection between the sensor carrier 1 and the coaxial assembly 3 is facilitated, avoiding wear or scratches to the first rod 100 and the second rod 200 caused by frequent disassembly and assembly. Moreover, the first sleeve 4 and the second sleeve 5 can be preset with multiple models. Each model of the first sleeve 4 is adapted to a model of the first rod 100, and each model of the second sleeve 5 is adapted to a model of the second rod 200. The connection surfaces of the first sleeve 4 and the second sleeve 5 with the sensor carrier 1 and the coaxial assembly 3 are consistent for different models. That is, the inner diameter of the end of the first sleeve 4 connected to the first rod 100 is adjustable, and the inner diameter of the end of the second sleeve 5 connected to the second rod 200 is adjustable. This allows the rod centering mechanism to be applicable to coaxial docking of different models of rod-shaped structures, saving costs, expanding the scope of application, and improving practicality.

[0068] Specifically, a first connecting portion is provided at the other end of the first rod sleeve 4 extending along its axis, and a second connecting portion is provided at the other end of the second rod sleeve 5 extending along its axis. The first and second connecting portions are detachably connected. After the first rod 100 and the second rod 200 are aligned using the sensor carrier 1 and the coaxial assembly 3, the coaxial docking of the first rod 100 and the second rod 200 is achieved by connecting the first and second connecting portions. For example, the first and second connecting portions are connected by a connecting sleeve 6. The first connecting portion is a first connecting screw 41 protruding along the axial direction of the first rod sleeve 4, and the second connecting portion is a second connecting screw 51 protruding along the axial direction of the second rod sleeve 5. The two ends of the connecting sleeve 6 can be threadedly connected to the first connecting screw 41 and the second connecting screw 51, respectively. When connecting the first rod 100 and the second rod 200, rotate the connecting sleeve 6 and move the first rod 100 and / or the second rod 200 along the X direction, so that the first connecting screw 41 is screwed into one end of the connecting sleeve 6 and the second connecting screw 51 is screwed into the other end of the connecting sleeve 6. The connection has better stability and higher structural strength, achieving stable connection of the first rod 100 and the second rod 200.

[0069] In this embodiment, as Figures 14 to 20As shown, the centering mechanism for the rod also includes an angle adjustment component 7 and a mounting base 9. The angle adjustment component 7 includes a fixed base 71, a pitch frame 72, and a yaw rotary table 76. The pitch frame 72 is rotatably mounted on the fixed base 71 in the Y direction, and the yaw rotary table 76 is rotatably mounted on the pitch frame 72 along its axis. The second rod 200 is detachably connected to the mounting base 9, and the mounting base 9 is detachably connected to the yaw rotary table 76. The second rod 200 can swing with the rotation of the pitch frame 72 and the yaw rotary table 76, that is, the angle of the second rod 200 relative to the fixed base 71 is adjustable in the Y direction and the Z direction, respectively. During alignment, the second rod 200 is mounted on the mounting base 9, and then the mounting base 9 is mounted on the yaw rotary table 76, for example, by bolt connection. By rotating the pitch frame 72 and the yaw rotary table 76, the tilt sensor 2 fitted on the second rod 200 is brought back to zero, meaning the second rod 200 can be adjusted to be parallel to the first rod 100, improving the alignment accuracy of the first rod 100 and the second rod 200. By driving the push-pull force component, the first rod 100 is moved along the X direction, applying a pulling or pushing force to the second rod 200. The pulling or pushing force detected by the force sensor 10 at this time is the pulling or pushing force applied by the first rod 100 to the second rod 200. By setting the angle of the second rod 200 relative to the fixed base 71 to be adjustable and the position of the first rod 100 to be adjustable, the flexibility of use is good, and the accuracy of testing axial pushing and pulling forces is high.

[0070] Specifically, the angle adjustment assembly 7 also includes a pitch drive source 73 and a yaw drive source 75. The pitch drive source 73 is mounted on the fixed base 71 and drives the pitch frame 72. The yaw drive source 75 drives the yaw rotary table 76 and can drive the yaw rotary table 76 to rotate around its own axis. The axis of the yaw rotary table 76 is perpendicular to the Y direction. The second rod 200 is detachably mounted on the yaw rotary table 76 via the mounting base 9. By driving the yaw rotary table 76 to rotate through the yaw drive source 75, the second rod 200 is driven to rotate, thereby realizing the swing of the second rod 200 relative to the X direction, that is, it can drive the second rod 200 to be adjusted to be parallel to the line where the first rod 100 is located.

[0071] For example, a yaw rotary table 76 is rotatably mounted on the pitch frame 72 via a rotary shaft. The rotary shaft is connected to the pitch frame 72 via a rotating rolling bearing. The second rod 200 can be fixed to the yaw rotary table 76 via a mounting base 9. The yaw drive source 75 includes a stepper motor and a right-angle planetary reducer. The stepper motor drives the right-angle planetary reducer, and the rotary shaft is connected to the right-angle planetary reducer via a coupling. During the movement, the stepper motor provides power to drive the right-angle planetary reducer, which in turn drives the yaw rotary table 76 to move back and forth. The speed of the yaw rotary table 76 moving back and forth during operation is controlled by the stepper motor. Preferably, the right-angle planetary reducer is also connected to an electromagnetic power-off brake, which ensures timely braking in the event of an accidental power failure, thereby ensuring the safety of the dual-valve friction force testing device.

[0072] For example, the pitch drive source 73 includes a drive stepper motor and a worm gear reducer. The fixed base 71 includes a fixed base plate and two opposing support plates vertically mounted on the fixed base plate. The pitch frame 72 is rotatably connected between the two support plates via a rotary shaft. The rotary shaft is rotatably connected to the two support plates via two rolling bearings. The pitch frame 72 and the rotary shaft are connected via splines. The drive end of the drive stepper motor is connected to the input end of the worm gear reducer, and the output end of the worm gear reducer is connected to the rotary shaft. The drive motor drives the rotary shaft to rotate via a reverse-locking worm gear reducer, thereby adjusting the pitch angle of the pitch frame 72 by ±3°. The reverse-locking worm gear reducer can achieve reverse self-locking at any position.

[0073] Preferably, the angle adjustment assembly 7 further includes a locking member 74, which is disposed on the fixed base 71 and can be connected to or released from the pitch frame 72 to limit its rotation relative to the fixed base 71, or to release the pitch frame 72 to allow it to rotate relative to the fixed base 71. When the pitch frame 72 has rotated to its designated position, the locking member 74 further secures the pitch frame 72 and the fixed base 71, increasing the rigidity of the pitch frame 72 during testing. More preferably, multiple locking members 74 are provided, and these multiple locking members 74 can be connected to one or two support plates at intervals.

[0074] For example, the lock 74 includes a locking pin 741 and an offset fork 743. The offset fork 743 is rotatably connected to one end of the locking pin 741, and the other end of the locking pin 741 is provided with a limiting head 742. A first limiting hole is provided on the support plate, and a second limiting hole is provided on the pitch frame 72. The locking pin 741 is movably inserted through the first limiting hole and the second limiting hole. By rotating the offset fork 743, the locking pin 741 can be moved to a position where the lock head abuts against or moves away from the side of the pitch frame 72 that is away from the support plate. Preferably, the second limiting hole is a stepped hole, with the smaller section of the stepped hole facing the first limiting hole and the larger section facing away from the first limiting hole.

[0075] Specifically, the offset fork 743 includes a U-shaped plate and a locking handle. One end of the locking pin 741 is rotatably connected between the U-shaped plates via a rotating pin. When the locking handle is subjected to force, it causes the U-shaped plate to rotate around the rotating pin. The end of the U-shaped plate can rotate to abut against the side of the support plate away from the pitch frame 72. At this time, the locking pin 741 moves away from the pitch frame 72 until the limiting head 742 abuts against the step surface in the step hole, thereby achieving relative fixation of the pitch frame 72 and the fixed seat 71. When the locking handle is subjected to force, it causes the U-shaped plate to continue rotating around the rotating pin or to rotate in the opposite direction. The end of the U-shaped plate moves away from the support plate away from the pitch frame 72. At this time, the locking pin 741 moves away from the support plate until the limiting head 742 moves away from the pitch frame 72 away from the support plate, thereby releasing the pitch frame 72 and the fixed seat 71. Of course, in other embodiments, the locking member 74 can also be other structures. For example, the locking member 74 is a set screw threaded to the support plate. By rotating the set screw, the set screw moves along the Y direction, thereby causing the set screw to abut against or move away from the pitch frame 72, thus fixing or releasing the pitch frame 72 and the fixed seat 71.

[0076] Furthermore, the rod alignment mechanism also includes a push-pull mechanism 8, which is arranged opposite to the angle adjustment component 7 along the X direction. The push-pull mechanism 8 includes an adjustment component 81 and an X-direction drive source 82. The X-direction drive source 82 is adjustablely positioned on the adjustment component 81 in the Y and Z directions. The first rod 100 is detachably connected to the drive end of the X-direction drive source 82 along its length, and the X-direction drive source 82 can drive the first rod 100 to move along the X direction. When aligning the first rod 100 and the second rod 200 using the coaxial component 3, the adjustment component and the X-direction drive source 82 can drive the first rod 100 to translate, so that the first rod 100 moves until it is finally coaxial with the second rod 200.

[0077] Specifically, the adjustment assembly 81 includes a Y-axis moving mechanism 812 and a Z-axis lifting mechanism 811. The Z-axis lifting mechanism 811 includes a support frame 8111, a moving frame 8112, and a Z-axis drive source 8113. The moving frame 8112 is slidably connected to the support frame 8111 along the Z-direction, preferably connected to the support frame 8111 via a slide rail and a slider to improve sliding smoothness. The Z-axis drive source 8113 drives the moving frame 8112 to slide along the Z-direction. The Y-axis moving mechanism 812 is disposed on the moving frame 8112, and the X-axis drive source 82 is disposed on the Y-axis moving mechanism 812. By driving the moving frame 8112 to slide on the support frame 8111 through the Z-axis drive source 8113, the position of the Y-axis moving mechanism 812 in the Z-direction is adjusted, thereby realizing the position adjustment of the X-axis drive source 82 in the Z-direction.

[0078] Preferably, the support frame 8111 adopts a symmetrical structure, including two opposing side webs, with the Z-axis drive source 8113 located between the two side webs, resulting in better structural compactness and higher structural strength. More preferably, the support frame 8111 is provided with weight-reduction holes, which reduces its weight without affecting structural strength, thus saving costs and facilitating transportation.

[0079] For example, the Z-axis drive source 8113 includes a drive motor and a worm gear jack. The drive motor drives the worm gear jack, which in turn drives the movable frame 8112. The drive motor drives the worm gear jack to move, thereby causing the movable frame 8112 to move along the Z-direction. Of course, in other embodiments, the Z-axis drive source 8113 can be other types, such as a drive cylinder.

[0080] More specifically, the Y-axis moving mechanism 812 includes a Y-axis drive source 8121 and a Y-axis moving plate 8122. The Y-axis drive source 8121 is mounted on the moving frame 8112 and is connected to a control module. The control module can control the start and stop of the Y-axis drive source 8121. The Y-axis drive source 8121 drives the Y-axis moving plate 8122 to move along the Y direction. The Y-axis moving plate 8122 is preferably slidably mounted on the moving frame 8112 via a slide rail and a slider to improve the smoothness and stability of the movement. The X-axis drive source 82 is mounted on the Y-axis moving plate 8122. For example, the Y-axis drive source 8121 includes a drive motor and a lead screw. The drive motor drives one end of the lead screw, enabling the lead screw to rotate. A lead screw nut is provided on the Y-axis moving plate 8122, and the lead screw is threadedly connected to the lead screw nut. By driving the lead screw to rotate through the drive motor, the Y-axis moving plate 8122 is driven to slide along the Y direction on the moving frame 8112, thereby realizing the position adjustment of the X-axis drive source 82 in the Y direction. Of course, in other embodiments, the Y-axis drive source 8121 can also be other types, such as a drive cylinder.

[0081] After the position of the first rod 100 is adjusted by the adjustment component 81, coaxial adjustment is performed by the coaxial component 3 and the push-pull mechanism 8 to make the first rod 100 and the second rod 200 coaxial. Then, the connecting sleeve 6 is used to connect the connecting ends of the first rod 100 and the second rod 200, realizing the coaxial connection of the first rod 100 and the second rod 200. This rod centering mechanism has low cost, wide applicability, and can assist in adjusting the two rods to coaxiality, saving time and effort, and resulting in a high degree of coaxiality between the two rods. The coaxial connection of the first rod 100 and the second rod 200 after using the connecting sleeve 6 has better coaxiality, which facilitates axial push-pull force testing. Moreover, the push-pull force test can be achieved by driving the first rod 100 to move through the X-direction drive source 82.

[0082] like Figures 14 to 20As shown, this embodiment also provides a rod push-pull force testing device for testing the pulling or pushing force applied by the first rod 100 to the second rod 200. The rod push-pull force testing device includes the first rod 100, the second rod 200, and the aforementioned rod alignment mechanism. By using the aforementioned rod alignment mechanism to coaxially align the first rod 100 and the second rod 200, the coaxiality of the first rod 100 and the second rod 200 is high, thereby improving the accuracy of the push-pull force test. Preferably, during the push-pull force test, a force sensor 10 is provided on the X-direction drive source 82. For example, the first rod 100 is connected to the X-direction drive source 82 through the force sensor 10, or a drive element with a built-in force sensor 10 is used.

[0083] By using the X-direction drive source 82 to drive the first rod 100 to move and test the axial push-pull force of the first rod 100 and the second rod 200, it can be applied to various mechanical testing fields, such as the friction force test of a dual valve, testing the friction force between the valve stem and the sealing packing inside the valve body. The valve stem is the second rod 200 mentioned above. The first rod 100 is driven to move by the X-direction drive source 82 to apply the axial push-pull force. That is, by using the above-mentioned rod centering mechanism, the coaxiality of the valve stem and the driving direction of the X-direction drive source 82 is high, which is beneficial to improving the accuracy of the push-pull force test and reducing the influence of lateral force on the accuracy of the push-pull force test.

[0084] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A rod alignment mechanism for assisting in the coaxial docking of two rod-shaped structures, wherein the two rod-shaped structures are a first rod and a second rod, characterized in that, The rod centering mechanism includes: A sensor carrier is provided with an inclination sensor that is parallel to the axis of the sensor carrier. One end of the sensor carrier is detachably coaxially connected to the connection end of the first rod. The inclination sensor can be zeroed. The other end of the sensor carrier is detachably coaxially connected to the connection end of the second rod. The second rod can be swung under force until the inclination sensor returns to zero twice. A coaxial assembly, detachably connected to the first rod and / or the second rod, is used to indicate whether the first rod and the second rod are coaxial, and the first rod and / or the second rod can be translated under force to make the first rod and the second rod coaxial.

2. The centering mechanism for a rod according to claim 1, characterized in that, The coaxial assembly includes: A coaxial fixture includes a first section and a second section that are coaxial. The outer dimensions of the first section are the same as those of the first rod, and the outer dimensions of the second section are the same as those of the second rod. A coaxial sleeve is provided, on which a first dial indicator and a second dial indicator are circumferentially spaced and vertically arranged. The coaxial sleeve is detachably coaxially fitted onto the first section and spaced coaxially fitted onto the second section. The measuring rods of the first and second dial indicators abut against the outer periphery of the second section and can both be adjusted to zero. One end of the coaxial sleeve is detachably coaxially fitted onto the connecting end of the first rod, and the other end is detachably spaced onto the connecting end of the second rod. The measuring rods of the first and second dial indicators abut against the outer periphery of the connecting end of the second rod. The first rod and / or the second rod can be forcefully moved to the point where the first and second dial indicators are zeroed a second time.

3. The centering mechanism for a rod according to claim 2, characterized in that, The coaxial fixture further includes a third section, which abuts against one end of the coaxial sleeve when the first and second sections are fitted inside the coaxial sleeve.

4. The centering mechanism for a rod according to claim 2, characterized in that, One end of the coaxial sleeve is provided with a first limiting groove and a second limiting groove, and the outer periphery of the connecting end of the first rod is provided with a first limiting protrusion and a second limiting protrusion. The first limiting groove and the second limiting groove can simultaneously engage with the first limiting protrusion and the second limiting protrusion respectively for limiting.

5. The centering mechanism for a lever according to any one of claims 1-4, characterized in that, The sensor carrier has a first sleeve hole at one end and a second sleeve hole at the other end. The axes of the first sleeve hole and the second sleeve hole coincide. The connecting end of the first rod can be fitted into the first sleeve hole. The shape and size of the outer periphery of the connecting end of the first rod are adapted to the shape and size of the first sleeve hole. The connecting end of the second rod can be fitted into the second sleeve hole. The shape and size of the outer periphery of the connecting end of the second rod are adapted to the shape and size of the second sleeve hole.

6. The centering mechanism for a lever according to any one of claims 1-4, characterized in that, The outer wall of the sensor carrier has a planar mounting surface, which is parallel to the axis of the sensor carrier. The tilt sensor can be detachably mounted on the mounting surface.

7. The centering mechanism for a lever according to any one of claims 1-4, characterized in that, The rod centering mechanism further includes: An angle adjustment assembly includes a fixed base, a pitch frame, and a yaw rotary table. The pitch frame is rotatably mounted on the fixed base in the Y direction, and the yaw rotary table is rotatably mounted on the pitch frame along its axis. Mounting base, the second rod is detachably connected to the mounting base, the mounting base is detachably connected to the yaw rotary table, and the second rod can swing with the rotation of the pitch frame and the yaw rotary table.

8. The centering mechanism for a lever according to any one of claims 1-4, characterized in that, The rod centering mechanism further includes a push-pull mechanism, which includes an adjustment component and an X-direction drive source. The X-direction drive source is adjustablely positioned on the adjustment component along the Y and Z directions. The first rod is detachably connected to the drive end of the X-direction drive source along its length direction. The X-direction drive source can drive the first rod to move along the X direction.

9. The centering mechanism for a lever according to any one of claims 1-4, characterized in that, Also includes The first rod sleeve has one end for detachable coaxial connection to the end of the first rod facing the second rod, forming the connecting end of the first rod. The second rod sleeve has one end for detachable coaxial connection to the end of the second rod facing the first rod, forming the connection end of the second rod. The second rod sleeve and the first rod sleeve are detachably connected.

10. A push-pull force testing device for a rod, characterized in that, Including the centering mechanism for the rod as described in any one of claims 1-9.

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