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

Abstract

The invention 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 a first rod and a second rod correspondingly, and 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] The invention relates to the technical field of rod-shaped structure centering, and in particular to a rod centering mechanism and a rod push-pull force testing device. Background Art

[0002] With the advancement of science and technology, the requirements for processing accuracy, installation accuracy, alignment accuracy, etc. of various equipment or parts are getting higher and higher. For example, in the field of optics, mechanical welding, etc., higher alignment accuracy is required, or in the field of axial force testing, the coaxiality of the measured rod and the force rod directly affects the accuracy of the test structure. Among them, when testing the friction force of the double valve, the coaxiality of the valve stem and the push-pull force directly affects the accuracy of the measured push-pull force, that is, it affects the accuracy of the measured friction force. In the prior art, it is generally measured whether the two rods are aligned after moving the two rods together, and then roughly fine-tuning is performed or a centering sensor is used to assist in the adjustment. However, in the process of adjusting the coaxial alignment of the two rods, it is difficult to accurately adjust the coaxiality to the preset accuracy.

[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. Summary of the invention

[0004] Based on the above, the purpose of the present invention is to provide a rod centering mechanism and a rod push-pull force testing device, which have low cost and wide application range, can assist in adjusting the two rods to be coaxial, save time and effort, and make the coaxiality of the two rods higher.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A rod centering mechanism is used to assist two rod-shaped structures in coaxial docking, wherein the two rod-shaped structures are a first rod and a second rod, and the rod centering mechanism comprises:

[0007] A sensor carrier, on which an inclination sensor parallel to the axis of the sensor carrier is arranged, one end of the sensor carrier is detachably coaxially connected to the connecting end of the first rod, and the inclination sensor can be reset to zero, and the other end of the sensor carrier is detachably coaxially connected to the connecting end of the second rod, and the second rod can be forced to swing until the inclination sensor is reset to zero for the second time;

[0008] The coaxial assembly is detachably connected to the first rod and / or the second rod, and is used to indicate whether the first rod and the second rod are coaxial. The first rod and / or the second rod can be forced to translate until the first rod and the second rod are coaxial.

[0009] As a preferred solution of a rod centering mechanism, the coaxial assembly comprises:

[0010] A coaxial fixture, comprising a coaxial first section and a coaxial second section, wherein 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, on which a first dial indicator and a second dial indicator are circumferentially spaced and vertically arranged, the coaxial sleeve has a removable coaxial contact sleeve on the first section and an interval coaxial sleeve on the second section, the measuring rods of the first dial indicator and the second dial indicator touch the outer periphery of the second section and can both be adjusted to zero, one end of the coaxial sleeve has a removable coaxial contact sleeve on the connecting end of the first rod, and the other end has a removable interval sleeve on the connecting end of the second rod, the measuring rods of the first dial indicator and the second dial indicator touch the outer periphery of the connecting end of the second rod, and the first rod and / or the second rod can be forced to translate to the first dial indicator and the second dial indicator for a second zeroing.

[0012] As a preferred solution of a rod centering mechanism, the coaxial fixture further includes a third section, and when the first section and the second section are sleeved in the coaxial sleeve, the third section abuts against one end of the coaxial sleeve.

[0013] As a preferred solution for a rod centering mechanism, a first limiting groove and a second limiting groove are provided at one end of the coaxial sleeve, and a first limiting protrusion and a second limiting protrusion are provided on the outer periphery of the connecting end of the first rod, and the first limiting groove and the second limiting groove can respectively cooperate with the first limiting protrusion and the second limiting protrusion at the same time.

[0014] As a preferred solution for a rod centering mechanism, a first set of holes is provided at one end of the sensor carrier, and a second set of holes is provided at the other end, the axes of the first set of holes and the second set of holes coincide, the connecting end of the first rod can be sleeved in the first set of holes, and the shape and size of the outer periphery of the connecting end of the first rod are compatible with the shape and size of the first set of holes, the connecting end of the second rod can be sleeved in the second set of holes, and the shape and size of the outer periphery of the connecting end of the second rod are compatible with the shape and size of the second set of holes.

[0015] As a preferred solution of the rod centering mechanism, the outer wall of the sensor carrier is formed with a planar mounting surface, the mounting surface is parallel to the axis of the sensor carrier, and the inclination sensor is detachably mounted on the mounting surface.

[0016] As a preferred solution of a rod centering mechanism, the rod centering mechanism further comprises:

[0017] An angle adjustment assembly, comprising a fixed seat, a pitch frame and a yaw rotating platform, wherein the pitch frame is rotatably arranged on the fixed seat in the Y direction, and the yaw rotating platform is rotatably arranged on the pitch frame along its axis;

[0018] The second rod is detachably connected to the mounting seat, the mounting seat is detachably connected to the yaw rotating platform, and the second rod can swing with the rotation of the pitch frame and the yaw rotating platform.

[0019] As a preferred solution of a rod centering mechanism, the rod centering mechanism also includes a push-pull force mechanism, which includes a positioning assembly and an X-direction driving source, the X-direction driving source is adjustably arranged on the positioning assembly along the Y direction and the Z direction, the first rod is connected to the driving end of the X-direction driving source along its length direction, and the X-direction driving source can drive the first rod to move along the X direction.

[0020] As a preferred solution of the rod centering mechanism, it also includes

[0021] A first rod sleeve, one end of which is used for detachably coaxially connecting the first rod toward one end of the second rod to form a connecting end of the first rod;

[0022] A second rod sleeve has one end for detachably coaxially connecting the second rod toward one end of the first rod to form a connecting end of the second rod, and the second rod sleeve and the first rod sleeve are detachably connected.

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

[0024] The beneficial effects of the present invention are:

[0025] The present invention provides a rod centering mechanism, which is achieved by coaxially connecting a sensor carrier to the connecting end of a first rod, and then zeroing the inclination sensor, that is, making the overall angle of the inclination sensor the same as the angle of the straight line where the first rod is located; removing the sensor carrier, and connecting the sensor carrier to the connecting end of a second rod, at which time the inclination sensor detects the inclination of the second rod, and by adjusting the angle of the second rod, making the inclination sensor display zero, the second rod is parallel to the first rod. Then, the first rod and / or the second rod is moved according to the indication of the coaxial component until the coaxial component indicates that the first rod and the second rod are coaxial, that is, the coaxiality of the first rod and the second rod is achieved, and the docking accuracy of the first rod and the second rod is ensured. The rod centering mechanism is not only suitable for fields with high requirements for the coaxiality of rod-shaped structure docking, but also suitable for the field of axial force testing. The rod centering mechanism has simple structure and operation, and high centering efficiency.

[0026] The present invention also provides a push-pull force testing device for a rod, comprising 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 result. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0028] Figure 1 is a schematic diagram of the structure of a sensor carrier provided by an embodiment of the present invention at a viewing angle;

[0029] Figure 2 is a schematic structural diagram of a sensor carrier provided by an embodiment of the present invention at another viewing angle;

[0030] Figure 3 is a side view of a sensor carrier carrying a tilt sensor at a viewing angle provided by an embodiment of the present invention;

[0031] Figure 4 is a structural schematic diagram of a first rod sleeve provided by an embodiment of the present invention;

[0032] Figure 5 is a schematic structural diagram of a second rod sleeve provided by an embodiment of the present invention;

[0033] Figure 6 is a cross-sectional view of a sensor carrier sleeve on a first rod sleeve provided by an embodiment of the present invention;

[0034] Figure 7 is a cross-sectional view of a sensor carrier provided by an embodiment of the present invention sleeved on a second rod sleeve;

[0035] Figure 8 is a schematic structural diagram of a coaxial fixture provided by an embodiment of the present invention;

[0036] Fig. 9 is a schematic structural diagram of a coaxial sleeve provided by an embodiment of the present invention;

[0037] Fig.10 It is a side view of a first dial indicator and a second dial indicator mounted on a coaxial sleeve provided by an embodiment of the present invention;

[0038] Fig.11 is a cross-sectional view of a coaxial sleeve provided by an embodiment of the present invention being sleeved on a coaxial fixture;

[0039] Fig.12is a cross-sectional view of a coaxial sleeve provided by an embodiment of the present invention sleeved on a first rod sleeve and a second rod sleeve;

[0040] Fig.13 is a schematic structural diagram of a connecting sleeve provided by an embodiment of the present invention;

[0041] Fig.14 is a schematic structural diagram of a rod push-pull force testing device at a viewing angle provided by an embodiment of the present invention;

[0042] Fig.15 The side view of the push-pull force testing device for a rod provided by an embodiment of the present invention Figure 1 (the first rod and the second rod are not connected);

[0043] Fig.16 is a top view of a rod push-pull force testing device provided by an embodiment of the present invention;

[0044] Fig.17 is a schematic structural diagram of a rod push-pull force testing device provided by an embodiment of the present invention from another perspective;

[0045] Fig.18 is a partial structural schematic diagram of an angle adjustment assembly provided by an embodiment of the present invention;

[0046] Fig.19 is a schematic structural diagram of a fixing base provided by an embodiment of the present invention;

[0047] Fig. 20 The side view of the push-pull force testing device for a rod provided by an embodiment of the present invention Figure 2 (The first rod and the second rod are connected).

[0048] In the figure:

[0049] 100, first rod; 1001, first limiting protrusion; 1002, second limiting protrusion; 200, second rod;

[0050] 1. Sensor carrier; 101. First set of holes; 102. Second set of holes; 2. Inclination 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 limit groove; 3202. Second limit 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. Fixed seat; 72. Pitch frame; 73. Pitch drive source; 74. Locking piece; 741. Locking pin; 742. Limiting head; 743. Offset fork; 75. Yaw drive source; 76. Yaw rotating table;

[0052] 8. Push-pull mechanism; 81. Position adjustment assembly; 811. Z-direction lifting mechanism; 8111. Support frame; 8112. Moving frame; 8113. Z-direction driving source; 812. Y-direction moving mechanism; 8121. Y-direction driving source; 8122. Y-direction moving plate; 82. X-direction driving source;

[0053] 9. Mounting seat;

[0054] 10. Force sensor. DETAILED DESCRIPTION

[0055] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0056] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0058] In the description of the present embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0059] like Figures 1 to 20 As shown, this embodiment provides a rod centering mechanism, which is used to assist the coaxial docking of two rod-like structures, the two rod-like structures are respectively a first rod 100 and a second rod 200, the cross-sections of the first rod 100 and the second rod 200 can be selected but not limited to circular, rectangular, etc., and the following takes the first rod 100 and the second rod 200 as cylindrical as an example. Specifically, the rod centering mechanism includes a sensor carrier 1 and a coaxial sleeve 32, the sensor carrier 1 is provided with an inclination sensor 2 parallel to the axis of 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 be zeroed, and 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 forced to swing until the inclination sensor 2 is zeroed twice. Among them, the inclination sensor 2 is preferably a three-axis inclination sensor 2. Before docking the first rod 100 and the second rod 200, it is necessary to first adjust the directions of the first rod 100 and the second rod 200 so that the first rod 100 and the second rod 200 are parallel to each other, and then adjust the coaxiality of the first rod 100 and the second rod 200, that is, the first rod 100 and the second rod 200 are located in a straight line, so as to improve the subsequent docking accuracy of the first rod 100 and the second rod 200, for example, to improve the subsequent push-pull force test accuracy of the first rod 100 and the second rod 200. When aligning the first rod 100 and the second rod 200, first connect the sensor carrier 1 coaxially to the connecting end of the first rod 100, and then zero the inclination sensor 2, that is, make the overall angle of the inclination sensor 2 the same as the angle of the straight line where the first rod 100 is located; remove the sensor carrier 1, and connect the sensor carrier 1 to the connecting end of the second rod 200. At this time, the inclination sensor 2 detects the inclination of the second rod 200. By adjusting the angle of the second rod 200, the inclination sensor 2 displays zero, and 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, the first rod 100 and the second rod 200 are arranged opposite to each other with the extension direction of the first rod 100 being the X direction, and after the sensor carrier 1 is connected to the connecting end of the second rod 200, the second rod 200 is adjusted to rotate around the Y direction axis and around the Z direction axis to return the inclination sensor 2 to zero, so that the second rod 200 and the first rod 100 are spatially parallel. By using the sensor carrier 1 loaded with the inclination sensor 2, the relative spatial angle of the first rod 100 and the second rod 200 can be quickly and accurately found, so that the first rod 100 and the second rod 200 are spatially parallel, the structure and operation are simple, and the centering efficiency is high.

[0060] In this embodiment, if Figures 1 to 3As shown, the outer wall of the sensor carrier 1 is formed with a flat mounting surface, which is parallel to the axis of the sensor carrier 1, and the inclination sensor 2 can be detachably mounted on the mounting surface. The flat mounting surface facilitates the stable mounting of the inclination sensor 2, and also makes the inclination sensor 2 have the same angle as the axis of the sensor carrier 1 after installation, thereby ensuring the measurement accuracy. For example, the inclination sensor 2 is detachably connected to the mounting surface by a plurality of bolts, and has a high structural strength and good stability.

[0061] Specifically, a first set of holes 101 is provided at one end of the sensor carrier 1, and a second set of holes 102 is provided at the other end. The axes of the first set of holes 101 and the second set of holes 102 coincide with each other. The connecting end of the first rod 100 can be sleeved in the first set of holes 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 set of holes 101. The connecting end of the second rod 200 can be sleeved in the second set of holes 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 set of holes 102. Through the sleeve connection, the sensor carrier 1 and the first rod 100 as well as the sensor carrier 1 and the second rod 200 can be coaxially connected quickly and conveniently, thereby improving work efficiency.

[0062] Furthermore, the rod centering mechanism also includes a coaxial component 3, which is detachably connected to the first rod 100 and is used to indicate whether the first rod 100 and the second rod 200 are coaxial. The first rod 100 and / or the second rod 200 can be forced to translate until the first rod 100 and the second rod 200 are coaxial. After adjusting the second rod 200 to be parallel to the first rod 100, the first rod 100 and / or the second rod 200 are moved in parallel along the Y direction and the Z direction according to the indication of the coaxial component 3 until the coaxial component 3 indicates that the first rod 100 and the second rod 200 are coaxial, that is, the coaxiality of the first rod 100 and the second rod 200 is achieved, and the docking accuracy of the first rod 100 and the second rod 200 is ensured. It is not only suitable for fields with high requirements for the coaxiality of rod-shaped structures, but also suitable for the field of axial force testing. The rod centering mechanism has simple structure and operation, and high centering efficiency.

[0063] In this embodiment, if 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 coaxial first section 311 and a second section 312. 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. The coaxial sleeve 32 is provided with a first dial indicator 321 and a second dial indicator 322 at intervals along the circumferential direction and vertically. The extension lines of the measuring rods of the first dial indicator 321 and the second dial indicator 322 pass through the axis of the coaxial sleeve 32. The coaxial sleeve 32 has a detachable coaxial contact sleeve. The first section 311 and the spaced coaxial sleeve are in the second section 312, the measuring rods of the first dial indicator 321 and the second dial indicator 322 are in contact with the outer periphery of the second section 312, and both can be adjusted to zero, one end of the coaxial sleeve 32 is a removable coaxial contact sleeve at the connecting end of the first rod 100, and the other end is a removable spacer sleeve at the connecting end of the second rod 200, the measuring rods of the first dial indicator 321 and the second dial indicator 322 are in contact with the outer periphery of the connecting end of the second rod 200, and the first rod 100 and / or the second rod 200 can be forced to translate to the first dial indicator 321 and the second dial indicator 322 for a second zeroing. In the normal state (when there is no object to be measured), the measuring rods of the first dial gauge 321 and the second dial gauge 322 will directly extend to the farthest point, that is, the maximum measuring range. Before the coaxial adjustment, after the coaxial sleeve 32 is put on the coaxial fixture 31, the first dial gauge 321 and the second dial gauge 322 are reset to zero. After the coaxial sleeve 32 is removed, the measuring rods of the first dial gauge 321 and the second dial gauge 322 are automatically reset. At this time, the data displayed on the first dial gauge 321 and the second dial gauge 322 are negative values; then the coaxial sleeve 32 is put on the second rod 200, and the end of the measuring rod of the first dial gauge 321 contacts the outer peripheral wall of the second rod 200 and / or the second dial gauge The end of the measuring rod 322 contacts the outer wall of the second rod 200, and the measuring rod of the first dial gauge 321 and / or the measuring rod of the second dial gauge 322 shrinks under force, and the data displayed on the first dial gauge 321 and / or the second dial gauge 322 is the deviation value between the first section 311 and the second rod 200; then move the first rod 100 so that the first rod 100 is inserted 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, and translate the first rod 100 and / or the second rod 200 until the data displayed on the first dial gauge 321 and the second dial gauge 322 are both reset to zero for the second time, indicating that the second rod 200 and the first rod 100 are coaxial. The graduation value of the first dial gauge 321 and the second dial gauge 322 is 0.01 mm. When the first dial gauge 321 and the second dial gauge 322 are reset to zero, 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 sleeved in 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 disassemble and assemble the coaxial fixture 31 and the coaxial sleeve 32.

[0065] More preferably, a first limiting groove 3201 and a second limiting groove 3202 are provided at one end of the coaxial sleeve 32, and a first limiting protrusion 1001 and a second limiting protrusion 1002 are provided at the outer periphery of the connecting end of the first rod 100, and the first limiting groove 3201 and the second limiting groove 3202 can respectively cooperate with the first limiting protrusion 1001 and the second limiting protrusion 1002 at the same time. When the coaxial sleeve 32 and the first rod 100 are sleeved, the first limiting groove 3201 and the second limiting groove 3202 cooperate with the first limiting protrusion 1001 and the second limiting protrusion 1002 to make the relative position of the coaxial sleeve 32 and the first rod 100 relatively stable, which plays a role in limiting stability, can effectively prevent the coaxial sleeve 32 from rotating relative to the first rod 100, and ensure the centering accuracy.

[0066] In another embodiment, the coaxial assembly 3 includes a centering instrument, which includes 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. The concentricity of the first rod 100 and the second rod 200 can be obtained by receiving the laser emitted by the laser emitter by the receiving target. The centering is completed 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. By first adjusting the spatial parallelism of the first rod 100 and the second rod 200, it is convenient to adjust the coaxiality through the coaxial assembly 3 later, thereby improving the centering accuracy.

[0067] Furthermore, if 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 for detachably coaxially connecting the first rod 100 toward one end of the second rod 200 to form a connecting end of the first rod 100, for example, by being threaded on the first rod 100, and one end of the second rod sleeve 5 is used for detachably coaxially connecting the second rod 200 toward one end of the first rod 100 to form a connecting end of the second rod 200, for example, by being threaded on the second rod 200. By providing the first rod sleeve 4 and the second rod sleeve 5, the connection between the sensor carrier 1 and the coaxial assembly 3 is facilitated, and frequent disassembly and assembly can avoid wear or scratches on the first rod 100 and the second rod 200. The first rod sleeve 4 and the second rod sleeve 5 can be preset in multiple models, each model of the first rod sleeve 4 is adapted to a model of the first rod 100, and each model of the second rod sleeve 5 is adapted to a model of the second rod 200. The connecting surfaces of the first rod sleeve 4 and the second rod sleeve 5 of different models with the sensor carrier 1 and the coaxial assembly 3 are consistent, that is, the inner diameter of the end of the first rod sleeve 4 connected to the first rod 100 is adjustable, and the inner diameter of the end of the second rod sleeve 5 connected to the second rod 200 is adjustable, so that the rod centering mechanism can be applicable to the coaxial docking of rod-like structures of different models, saving costs, expanding the scope of application and improving practicality.

[0068] Specifically, the other end of the first rod sleeve 4 is provided with a first connection portion extending along its axis, and the other end of the second rod sleeve 5 is provided with a second connection portion extending along its axis, and the first connection portion and the second connection portion are detachably connected. After the first rod 100 and the second rod 200 are aligned by 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 connection portion and the second connection portion. Exemplarily, the first connection portion and the second connection portion are connected by a connecting sleeve 6, the first connection portion is a first connecting screw 41 protruding along the axial direction of the first rod sleeve 4, and the second connection portion is a second connecting screw 51 protruding along the axial direction of the second rod sleeve 5, and 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 docking the first rod 100 and the second rod 200, the connecting sleeve 6 is rotated, and the first rod 100 and / or the second rod 200 are moved along the X direction at the same time, 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 stability is better and the structural strength is higher, thereby achieving stable docking of the first rod 100 and the second rod 200.

[0069] In this embodiment, if Figures 14 to 20As shown, the rod centering mechanism also includes an angle adjustment component 7 and a mounting seat 9. The angle adjustment component 7 includes a fixed seat 71, a pitch frame 72 and a yaw rotating table 76. The pitch frame 72 is rotatably arranged on the fixed seat 71 in the Y direction. The yaw rotating table 76 is rotatably arranged on the pitch frame 72 along its axis. The second rod 200 is detachably connected to the mounting seat 9. The mounting seat 9 is detachably connected to the yaw rotating table 76. The second rod 200 can swing with the rotation of the pitch frame 72 and the yaw rotating table 76, that is, the second rod 200 is adjustable relative to the fixed seat 71 with the Y direction and the Z direction as the axis angle respectively. During the alignment, the second rod 200 is mounted on the mounting seat 9, and then the mounting seat 9 is mounted on the yaw rotating table 76, for example, by bolt connection, and then the pitch frame 72 and the yaw rotating table 76 are rotated so that the inclination sensor 2 on the second rod 200 is reset to zero again, that is, the second rod 200 can be adjusted to be parallel to the first rod 100, thereby improving the docking accuracy of the first rod 100 and the second rod 200. The first rod 100 is driven to move along the X direction by the push-pull member, and a pulling force or a pushing force is applied to the second rod 200. At this time, the pulling force or the pushing force detected by the force sensor 10 is the pulling force or the pushing force applied to the second rod 200 by the first rod 100. By setting the second rod 200 to have an adjustable angle relative to the fixing seat 71 and an adjustable position of the first rod 100, the flexibility of use is better and the accuracy of testing the axial push-pull force is higher.

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

[0071] Exemplarily, a yaw rotating table 76 is arranged on the pitch frame 72 through a rotating shaft, the rotating shaft is connected to the pitch frame 72 through a rotating rolling bearing, and the second rod 200 can be fixed on the yaw rotating table 76 through a mounting seat 9; the yaw driving source 75 includes a stepper motor and a right-angle planetary reducer, the stepper motor drives the right-angle planetary reducer, and the rotating shaft is connected to the right-angle planetary reducer through a coupling. The stepper motor provides power to drive the right-angle planetary reducer during the movement process, and the right-angle planetary reducer drives the yaw rotating table 76 to move back and forth. During the operation, the speed of the yaw rotating table 76 moving back and forth is controlled by the stepper motor. Preferably, the right-angle planetary reducer is also connected to an electromagnetic power-off brake, which can ensure timely braking in the event of an accidental power failure, thereby ensuring the safety of the use of the dual-valve friction test device.

[0072] Exemplarily, the pitch drive source 73 includes a driving stepper motor and a worm gear reducer, the fixed seat 71 includes a fixed base plate and two opposite support plates vertically arranged on the fixed base plate, the pitch frame 72 is rotatably connected between the two support plates through a rotating shaft, the rotating shaft is rotatably connected to the two support plates through two rolling bearings, the pitch frame 72 is connected to the rotating shaft through a spline, the driving end of the driving 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 rotating shaft. The driving motor drives the rotating shaft to rotate through the reverse self-locking worm gear reducer to achieve a pitch angle adjustment of the pitch frame 72 of plus or minus 3°, and the reverse self-locking worm gear reducer can achieve reverse self-locking at any position.

[0073] Preferably, the angle adjustment assembly 7 further includes a lock 74, which is disposed on the fixed seat 71 and can be connected to the pitch frame 72 or release the pitch frame 72 to limit the rotation of the pitch frame 72 relative to the fixed seat 71, or release the pitch frame 72 so that the pitch frame 72 can rotate relative to the fixed seat 71. When the pitch frame 72 is rotated into place, the pitch frame 72 and the fixed seat 71 are further fixed by the lock 74 to increase the rigidity of the pitch frame 72 during the test. More preferably, a plurality of locks 74 are provided, and the plurality of locks 74 can be connected to one or two support plates at intervals.

[0074] Exemplarily, the lock member 74 includes a lock pin 741 and an offset fork 743, the offset fork 743 is rotatably connected to one end of the lock pin 741, a limit head 742 is arranged at the other end of the lock pin 741, a first limit hole is provided on the support plate, a second limit hole is provided on the pitch frame 72, the lock pin 741 is movably penetrated through the first limit hole and the second limit hole, and the lock pin 741 can be driven to move to the side of the lock head abutting against or away from the pitch frame 72 away from the support plate by rotating the offset fork 743. Preferably, the second limit hole is a stepped hole, the small hole section of the stepped hole faces the first limit hole, and the large hole section faces away from the first limit hole.

[0075] When the locking cam 741 is in the state of being moved away from the support plate, the locking cam 742 is in the state of being moved away from the support plate, thereby the locking cam 742 and the support plate 71 are in the state of being moved away from the support plate. Of course, in other embodiments, the locking member 74 may also be other structures. For example, the locking member 74 is a top screw threadedly connected to the support plate. By rotating the top screw, the top screw moves along the Y direction, so that the top screw abuts against or moves away from the pitch frame 72, thereby achieving the fixation or release of the pitch frame 72 and the fixing seat 71.

[0076] Furthermore, the rod centering mechanism also includes a push-pull mechanism 8, which is arranged relative to the angle adjustment component 7 along the X direction, and includes a positioning component 81 and an X-direction drive source 82, and the X-direction drive source 82 is arranged on the positioning component 81 in an adjustable manner in the Y direction and the Z direction, and the first rod 100 is detachably connected to the driving end of the X-direction drive source 82 along its length direction, and the X-direction drive source 82 can drive the first rod 100 to move along the X direction. When the coaxial component 3 is used to align the first rod 100 and the second rod 200, the first rod 100 can be driven to translate through the adjustment component and the X-direction drive source 82, so that the first rod 100 moves to the final coaxiality with the second rod 200.

[0077] Specifically, the positioning assembly 81 includes a Y-direction moving mechanism 812 and a Z-direction lifting mechanism 811. The Z-direction lifting mechanism 811 includes a support frame 8111, a moving frame 8112 and a Z-direction driving source 8113. The moving frame 8112 is connected to the support frame 8111 in a sliding manner along the Z direction, preferably connected to the support frame 8111 through a slide rail and a slider to improve the sliding smoothness. The Z-direction driving source 8113 drives the moving frame 8112 to drive the moving frame 8112 to slide along the Z direction. The Y-direction moving mechanism 812 is arranged on the moving frame 8112, and the X-direction driving source 82 is arranged on the Y-direction moving mechanism 812. The moving frame 8112 is driven to slide on the support frame 8111 by the Z-direction driving source 8113, which drives the Y-direction moving mechanism 812 to adjust its position in the Z direction, thereby realizing the position adjustment of the X-direction driving source 82 in the Z direction.

[0078] Preferably, the support frame 8111 adopts a bilaterally symmetrical structure, including two side webs arranged opposite to each other, and the Z-direction drive source 8113 is located between the two side webs, so that the structure is more compact and has a higher structural strength. More preferably, the support frame 8111 is provided with weight-reducing holes to reduce its weight without affecting the structural strength, which is conducive to cost saving and convenient transportation.

[0079] Exemplarily, the Z-direction driving source 8113 includes a driving motor and a worm gear elevator, the driving motor drives the worm gear elevator, the worm gear elevator drives the moving frame 8112, and the driving motor drives the worm gear elevator to move, thereby driving the moving frame 8112 to move along the Z direction. Of course, in other embodiments, the Z-direction driving source 8113 can also be other, such as a driving cylinder.

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

[0081] After the position of the first rod 100 is adjusted by the positioning assembly 81, the coaxial adjustment is performed through the coaxial assembly 3 and the push-pull mechanism 8, so that the first rod 100 and the second rod 200 are coaxial, and then the connecting end of the first rod 100 and the connecting end of the second rod 200 are connected by the connecting sleeve 6 to achieve the coaxial connection of the first rod 100 and the second rod 200. The rod centering mechanism has low cost and a wide range of applications. It can assist the two rods in adjusting to coaxiality, saving time and effort, and making the two rods have a higher coaxiality. The first rod 100 and the second rod 200 after the coaxial connection using the connecting sleeve 6 have a better coaxiality, which is convenient for axial push-pull force testing, and 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, the present embodiment also provides a rod push-pull force testing device for testing the pulling force or pushing force applied by the first rod 100 to the second rod 200, and the rod push-pull force testing device comprises the first rod 100, the second rod 200 and the above-mentioned rod centering mechanism. By adopting the above-mentioned rod centering 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, so that the push-pull force test accuracy is high. Preferably, during the push-pull force test, a force sensor 10 is set 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 driving element with a built-in force sensor 10 is used.

[0083] By driving the first rod 100 to move through the X-direction driving source 82 to 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 friction test of double valves, testing the friction between the valve stem and the sealing packing in the valve body, the valve stem is the above-mentioned second rod 200, and the first rod 100 is driven to move by the X-direction driving source 82 to apply the axial push-pull force, that is, by adopting the above-mentioned rod centering mechanism, the coaxiality of the valve stem and the driving direction of the X-direction driving source 82 is relatively high, which is beneficial to improving the push-pull force test accuracy and reducing the influence of lateral force on the push-pull force test accuracy.

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

Claims

1. A rod centering mechanism, used to assist two rod-like structures in coaxial docking, the two rod-like structures being a first rod and a second rod, characterized in that: The rod centering mechanism comprises: A sensor carrier, on which an inclination sensor parallel to the axis of the sensor carrier is arranged, one end of the sensor carrier is detachably coaxially connected to the connecting end of the first rod, and the inclination sensor can be reset to zero, and the other end of the sensor carrier is detachably coaxially connected to the connecting end of the second rod, and the second rod can be forced to swing until the inclination sensor is reset to zero for the second time; The coaxial assembly is detachably connected to the first rod and / or the second rod, and is used to indicate whether the first rod and the second rod are coaxial. The first rod and / or the second rod can be forced to translate until the first rod and the second rod are coaxial.

2. The rod centering mechanism according to claim 1, characterized in that: The coaxial assembly comprises: A coaxial fixture, comprising a coaxial first section and a coaxial second section, wherein 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, on which a first dial indicator and a second dial indicator are circumferentially spaced and vertically arranged, the coaxial sleeve has a removable coaxial contact sleeve on the first section and an interval coaxial sleeve on the second section, the measuring rods of the first dial indicator and the second dial indicator touch the outer periphery of the second section and can both be adjusted to zero, one end of the coaxial sleeve has a removable coaxial contact sleeve on the connecting end of the first rod, and the other end has a removable interval sleeve on the connecting end of the second rod, the measuring rods of the first dial indicator and the second dial indicator touch the outer periphery of the connecting end of the second rod, and the first rod and / or the second rod can be forced to translate to the first dial indicator and the second dial indicator for a second zeroing.

3. The rod centering mechanism according to claim 2, characterized in that: The coaxial fixture further includes a third section. When the first section and the second section are sleeved in the coaxial sleeve, the third section abuts against one end of the coaxial sleeve.

4. The rod centering mechanism according to claim 2, characterized in that: A first limiting groove and a second limiting groove are provided at one end of the coaxial sleeve, and a first limiting protrusion and a second limiting protrusion are provided on the outer periphery of the connecting end of the first rod. The first limiting groove and the second limiting groove can respectively cooperate with the first limiting protrusion and the second limiting protrusion at the same time.

5. The rod centering mechanism according to any one of claims 1 to 4, characterized in that: A first set of holes is provided at one end of the sensor carrier, and a second set of holes is provided at the other end, the axes of the first set of holes and the second set of holes coincide, the connecting end of the first rod can be sleeved in the first set of holes, 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 set of holes, the connecting end of the second rod can be sleeved in the second set of holes, 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 set of holes.

6. The rod centering mechanism according to any one of claims 1 to 4, characterized in that: A planar mounting surface is formed on the outer wall of the sensor carrier. The mounting surface is parallel to the axis of the sensor carrier. The inclination sensor can be detachably mounted on the mounting surface.

7. The rod centering mechanism according to any one of claims 1 to 4, characterized in that: The rod centering mechanism also includes: An angle adjustment assembly, comprising a fixed seat, a pitch frame and a yaw rotating platform, wherein the pitch frame is rotatably arranged on the fixed seat in the Y direction, and the yaw rotating platform is rotatably arranged on the pitch frame along its axis; The second rod is detachably connected to the mounting seat, the mounting seat is detachably connected to the yaw rotating platform, and the second rod can swing with the rotation of the pitch frame and the yaw rotating platform.

8. The rod centering mechanism according to any one of claims 1 to 4, characterized in that: The rod centering mechanism also includes a push-pull force mechanism, which includes a positioning assembly and an X-direction drive source. The X-direction drive source is adjustably arranged on the positioning assembly along the Y direction and the Z direction. The first rod is detachably connected to the driving 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.

9. The rod centering mechanism according to any one of claims 1 to 4, characterized in that: Also includes A first rod sleeve, one end of which is used for detachably coaxially connecting the first rod toward one end of the second rod to form a connecting end of the first rod; A second rod sleeve has one end for detachably coaxially connecting the second rod toward one end of the first rod to form a connecting end of the second rod, and 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: The invention comprises a rod centering mechanism as described in any one of claims 1 to 9.

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