Angular measurement mechanism for a part

Abstract

The application provides an angle measuring mechanism for parts, comprising a workbench, a bearing ring fixed on the top of the workbench through a connecting piece, at least two positioning assemblies slidably connected on the bearing ring and capable of extending into the interior of a bent pipe port and self-centering, and an annular angle scale arranged on the upper surface of the bearing ring; the positioning assembly is slidably connected on the bearing ring through a connecting part, and the positioning assembly comprises three positioning parts in a triangular shape, the three positioning parts extend into the interior of the bent pipe port, and the three positioning parts can be synchronously expanded and contracted. The application provides a bent pipe angle quick measuring device based on double positioning assemblies, and high efficiency, self-positioning and accurate measurement of bent pipe parts can be realized. The three positioning parts in a triangular shape are used to realize accurate positioning of the center line of the port, and the measuring result is directly displayed through the annular angle scale. The device has self-adapting function and can be compatible with bent pipe parts of different specifications.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of angle measurement, in particular to an angle measurement mechanism for a part. BACKGROUND

[0002] In the field of industrial manufacturing, such as automotive, aerospace, shipbuilding and pipeline manufacturing industries, bent pipe parts are widely used in fluid transportation, structural support and space layout optimization scenarios. The accuracy of the bend angle is crucial for the installation precision of the parts and the performance of the system. Therefore, angle measurement of bent pipe parts is an important link to ensure product quality.

[0003] Traditional bend angle measurement methods usually rely on manual operation, using simple angle rulers or laser measurement devices. These methods can meet the basic needs, but have the following problems:

[0004] (1) Difficulty in positioning: due to the complex shape of the bent pipe, the center axis of the port is often difficult to accurately align, resulting in large measurement angle error.

[0005] (2) Low measurement efficiency: traditional measurement methods require repeated adjustment of equipment or measurement position, making it difficult to adapt to the fast and efficient batch measurement needs of the production line.

[0006] (3) Poor adaptability: different specifications and shapes of bent pipes require separate adjustment of measurement tools or fixtures, complicating the operation and affecting efficiency.

[0007] (4) Measurement results are unstable: due to the influence of manual operation experience, measurement tool stability and external environment, the consistency and reliability of the measurement results are difficult to guarantee.

[0008] To solve the above problems, the industry has tried to introduce automated measurement equipment or improve the structure of the measurement tool to improve measurement accuracy and efficiency, but existing solutions often have complex structures, high costs, and cannot balance universality and ease of use. Therefore, developing a simple structure, easy to use, and capable of realizing fast self-positioning and accurate measurement of the bend angle measurement device has become a technical problem that the industry needs to solve.

[0009] Therefore, an angle measurement mechanism for a part is provided to solve the above problems. SUMMARY

[0010] The present application provides an angle measurement mechanism for a part to solve the problems of difficult positioning, low efficiency, poor adaptability and unstable results in existing bend angle measurement methods.

[0011] The present application solves the above technical problems by the following technical solutions:

[0012] The application provides an angle measuring mechanism for a part, comprising a workbench, a bearing ring fixed on the top of the workbench through a connecting piece, at least two positioning assemblies slidably connected to the bearing ring and capable of extending into the interior of a bent pipe port and self-centering, and an annular angle scale arranged on the upper surface of the bearing ring;

[0013] The positioning assembly is slidably connected to the bearing ring through a connecting part, and the positioning assembly comprises three positioning parts arranged in a triangular shape, the three positioning parts extend into the interior of the bent pipe port, and the three positioning parts can be synchronously expanded and contracted.

[0014] The two positioning assemblies in the expanded state extend into the two ports of the bent pipe part in sequence, the three positioning parts on the positioning assembly extending into the interior of the bent pipe port are simultaneously compressed inward, the three positioning parts arranged in a triangular shape position the center line of the positioning assembly on the center axis of the bent pipe port, after the two positioning assemblies extend into the bent pipe part in sequence, the bent pipe part is also positioned, so that self-positioning is realized, and the included angle between the center lines of the two positioning assemblies is the angle of the bent pipe part, and then the angle of the bent pipe part is read through the annular angle scale.

[0015] Through the corresponding two positioning assemblies, the bent pipe part can be quickly positioned, so that the angle of the bent pipe can be quickly measured.

[0016] In the technical solution, the connecting part comprises two arc-shaped bearing plates, and the two bearing plates are slidably connected to the annular sliding grooves on the upper part and the side wall of the bottom of the bearing ring, respectively.

[0017] A bearing frame is arranged on the inner ring side wall of the bearing ring and connected to the two bearing plates, the two bearing plates are arranged symmetrically with respect to each other, a bearing rod group arranged in a horizontal direction is fixed to the surface center of the bearing frame, the bearing plate slides on the bearing ring through the sliding groove, so that the positioning assembly has a moving ability, and the positioning of the bent pipe part is facilitated, the bearing rod group is composed of at least one columnar rod, and the positioning assembly is slidably connected to the inner cavity of the end of the bearing rod group.

[0018] A reading plate is fixed to the bearing plate and located on the top of the angle scale, and the reading plate and the center line of the positioning assembly are located on the same vertical plane.

[0019] During the positioning of the bent pipe part, the bearing plate slides on the sliding groove, so as to drive the positioning assembly to move on the bearing ring, so that the positioning assembly can extend into the port of the bent pipe part.

[0020] After the positioning of the bent pipe part is completed, the included angle of the bent pipe part is read through the positions of the reading plates of the two positioning assemblies on the angle scale.

[0021] The positioning assembly comprises a mounting rod, one end of the mounting rod is slidably connected inside the bearing rod group port, the positioning assembly is moved by sliding of the mounting rod inside the bearing rod port, the positioning assembly is conveniently extended into the port inner cavity of the elbow pipe part, the other end of the mounting rod is fixed with a connecting block, and the surface of the mounting rod is slidably connected with a moving ring.

[0022] The positioning part comprises a support rod which is obliquely arranged towards the side of the bearing ring, one end of the support rod is rotatably connected to the connecting block, the middle segment area of the support rod is rotatably connected to one end of a transmission rod, the other end of the transmission rod is rotatably connected to the surface of the moving ring, the surface of the mounting rod between the moving ring and the connecting block is sleeved with a first spring, and the two ends of the first spring are fixed to the moving ring and the connecting block respectively, when the first spring is not subjected to external force, the positioning part is in a branched state, and the whole positioning assembly is in an unfolded state.

[0023] The support member in a spherical structure is fixed to the end of the support rod.

[0024] Further, an inner measurement assembly arranged on the positioning part is further included, the inner measurement assembly comprises a transmission part arranged in a horizontal direction and a limiting part capable of moving the transmission part in the horizontal direction, the transmission part is connected to the support member, the transmission part and the limiting part are connected to each other in transmission, the limiting part slides on the mounting rod, and adjacent limiting parts are connected to each other through connecting arc plates.

[0025] The transmission part comprises two connecting shafts arranged in a same line, both the connecting shafts are fixed to the outer surface of the support member, and the connecting line between the center lines of the two connecting shafts penetrates the center of the support member, the center line of the connecting shaft penetrates the center of the support member, that is, the distance from the connecting frame to the topmost end point of the support member along the vertical direction is the radius of the connecting member, so as to obtain the inner diameter of the elbow port, the connecting shaft is perpendicular to the plane in which the rotating track of the corresponding positioning part is located, and the surface of the connecting shaft is sleeved with a sleeve ring.

[0026] The transmission frame is bifurcated at one end to form two end rods which are connected to the two sleeve rings on the same support member, and the independent end rod at the other end is connected to the limiting part, and the transmission frame is arranged in a horizontal direction.

[0027] The three inner measurement assemblies can point to three inner diameters of the inner wall of the elbow pipe, multiple data can be obtained at one time, and the accuracy of the measurement result is improved.

[0028] Further, the limiting part comprises a "door" shaped guiding frame, a transmission frame is arranged in the inner cavity of the guiding frame, the transmission frame is slidingly sleeved on the surface of the transmission frame, the inner cavity of the transmission frame is a quadrangular structure, two symmetrical outer walls of the transmission frame in the horizontal direction are fixedly provided with quadrangular limiting square rods, the two limiting square rods respectively penetrate through the through grooves on the two outer walls of the guiding frame, the through grooves are also in a quadrangular structure, the limiting square rods slide on the through grooves, and a first length scale is arranged on the outer wall of the guiding frame;

[0029] A base is fixed at the bottom of the guiding frame, the bottom surface of the base is arc-shaped and is attached to the surface of the mounting rod, and adjacent two bases are connected to each other through connecting arc plates, and the connecting arc plates and the bases jointly form an annular structure sleeved on the surface of the mounting rod.

[0030] When one end of the supporting part drives the transmission frame to move, the other end of the transmission frame slides in the inner cavity of the transmission frame, the transmission frame is always in a horizontal position during the driving process of the transmission frame by the supporting part, meanwhile, the transmission frame slides downward under the pressing of the transmission frame, the limiting square rods on the two sides of the transmission frame slide on the through grooves on the guiding frame, so that the transmission frame is always in a horizontal position during the vertical movement of the transmission frame driven by the supporting part, and the inner diameter of the elbow pipe is marked on the first length scale through the horizontal movement of the transmission frame.

[0031] In the technical scheme, an external measurement assembly is further arranged on the periphery of the positioning assembly and connected to the bearing rod group, the external measurement assembly comprises two symmetrical and telescopic clamping parts, the clamping parts are clamped on the outer wall of the elbow pipe, and a marking plate is connected to the moving end of the clamping part.

[0032] The two clamping parts are vertically arranged, and the connecting line of the central axes between the two clamping parts passes through the center line of the positioning assembly.

[0033] The connecting line of the central axes between the two clamping parts passes through the center line of the positioning assembly, that is, the connecting line of the central axes between the two clamping parts passes through the center line of the positioned elbow pipe port, when the two clamping parts abut against the outer wall of the elbow pipe, the spacing between the two clamping parts can reflect the outer diameter size of the elbow pipe, so that the measurement of the outer diameter of the elbow pipe is completed.

[0034] Specifically, the external measurement assembly further comprises a mounting frame, the mounting frame is wrapped outside the positioning assembly, a fixed plate is fixed on the pad on the mounting frame, and the clamping part is fixed on the fixed plate.

[0035] Two symmetrical "L" shaped connecting plates, one end of the connecting plate is fixed on the mounting frame, the other end of the connecting plate is fixed on the surface of the limiting ring, and the limiting ring is slidingly sleeved on the surface of one of the rod members of the bearing rod group.

[0036] Specifically, the clamping part comprises an inner rod and an outer rod which are sleeved with each other, the outer rod is sleeved on the surface of the inner rod, the inner rod is fixed on the bottom of the fixed plate, the surface of the inner rod is sleeved with a second spring, and two ends of the second spring are fixed on the inner rod and the outer rod respectively;

[0037] The bottom end of the outer rod is fixed with a connecting sleeve with a spherical surface, the connecting sleeve is sleeved on the surface of the self-rotating ball, and the exposed part of the self-rotating ball is less than one half of the surface area of the self-rotating ball, that is, the self-rotating ball can rotate in the inner cavity of the connecting sleeve;

[0038] The surface of the outer rod is fixed with an identification plate, the outer edge top end of the self-rotating ball close to one side of the positioning group is on the same horizontal plane as the end of the identification plate, and the end of the identification plate points to the second length scale table on the connecting plate on the same side.

[0039] By rotating the connecting plate and the mounting frame to drive the two clamping parts to rotate on the outer wall of the elbow pipe, the continuous multi-point measurement of the outer wall of the elbow pipe can be realized, and multiple groups of data can be obtained to facilitate the judgment of the manufacturing precision of the elbow pipe parts.

[0040] Further, the traction part comprises a traction rope, one end of the traction rope passes through the fixed plate, the inner rod and is connected to the inner cavity end wall of the outer rod in sequence, the other end of the traction rope passes through the top of the guide wheel and the bottom of the guide wheel in the vertical direction and is connected to the synchronous rod arranged in the horizontal direction, the guide wheel and the guide wheel are installed on the fixed plate, and the synchronous rod penetrates the connecting plate and is connected to the vertical rod;

[0041] The two vertical rods corresponding to the two clamping parts are connected through a synchronous part, the synchronous part is wrapped outside the bearing rod group, and a handle is fixed on the vertical rod.

[0042] The two clamping parts are driven by the traction part to shrink away from the side of the positioning assembly, and then the whole outer measurement assembly is moved until the clamping parts are moved to the specified position outside the elbow pipe, the traction part no longer binds the clamping parts, the clamping parts are elongated under the action of the second spring, and the clamping parts are clamped on the outer wall of the elbow pipe.

[0043] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be combined arbitrarily, that is, the preferred examples of the present application are obtained.

[0044] The present application provides a kind of based on double positioning assembly's elbow pipe parts angle quick measurement device, can realize the efficient, self-positioning and accurate angle measurement of elbow pipe parts, its beneficial effects are as follows:

[0045] (1) quick positioning and accurate measurement

[0046] Through the cooperation of the two positioning assemblies that can extend into the elbow port, the three positioning parts on the positioning assembly are distributed in a triangular shape and can be compressed inward at the same time, so that the center line of the positioning assembly is accurately positioned on the center axis of the elbow port. At the same time of positioning, the elbow-shaped part is automatically adjusted to the measuring state, so that the angle of the elbow can be quickly measured, greatly improving the measurement efficiency and accuracy, and being especially suitable for batch measurement demand in production line.

[0047] (2) Self-adaptive design and strong compatibility

[0048] Since the three positioning parts on the positioning assembly have the inward compression function, they can adapt to the actual size and shape changes of the elbow port, without the need for additional adjustment to be compatible with elbow-shaped parts of different specifications, thereby significantly improving the versatility and adaptability of the device.

[0049] (3) Intuitive and accurate angle measurement

[0050] The angle of the elbow is read out in real time through the angle scale of the ring structure, avoiding the cumbersome calculation steps and human error problems in the traditional measurement method. This design not only provides intuitive angle display, but also ensures high reliability and high accuracy of angle measurement, effectively improving the stability and repeatability of the measurement results.

[0051] (4) Simple structure and convenient use

[0052] The device adopts a simple mechanical structure design, avoiding the use of complex electronic components, with the advantages of low cost and convenient maintenance. In addition, the operation process is simple, and only the positioning assembly needs to be inserted into the two ends of the elbow to complete the positioning and angle measurement, without the need for professional skills, suitable for quick application by operators in various scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0053] Figure 1 It is a structural schematic diagram of the whole application;

[0054] Figure 2 It is a schematic diagram of the position relationship between the elbow-shaped part to be detected and the positioning assembly;

[0055] Figure 3 It is a schematic diagram of the overall structure of the external measurement assembly;

[0056] Figure 4 It is a schematic diagram of the position relationship between the elbow-shaped part to be detected and the positioning assembly with the external measurement assembly;

[0057] Figure 5 It is a schematic diagram of the bottom structure of the workbench;

[0058] Figure 6 It is a schematic diagram of the structure of the positioning assembly;

[0059] Figure 7 Structure diagram of the positioning assembly with internal measurement assembly of the present application;

[0060] Figure 8 Structure diagram of the positioning assembly with internal measurement assembly of the present application;

[0061] Figure 9 Structure diagram of the positioning assembly with internal measurement assembly of the present application;

[0062] Figure 10 Structure diagram of the positioning assembly with internal measurement assembly of the present application;

[0063] Figure 11 Structure diagram of the positioning assembly with internal measurement assembly of the present application;

[0064] Figure 12 Structure diagram of the positioning assembly with internal measurement assembly of the present application; Figure 11 Structure diagram of the positioning assembly with internal measurement assembly of the present application;

[0065] Figure 13 Structure diagram of the positioning assembly with internal measurement assembly of the present application;

[0066] Figure 14 Structure diagram of the positioning assembly with internal measurement assembly of the present application;

[0067] Figure 15 Structure diagram of the positioning assembly with internal measurement assembly of the present application; Figure 4 Structure diagram of the positioning assembly with internal measurement assembly of the present application;

[0068] Explanation of reference numerals

[0069] 1, workbench; 11, connecting piece;

[0070] 2, bearing ring; 21, angle scale; 22, annular sliding slot;

[0071] 3, bearing plate; 31, bearing frame; 32, reading plate;

[0072] 4, bearing rod group;

[0073] 5, positioning assembly; 51, mounting rod; 511, guide slot; 52, support rod; 521, support piece; 53, connecting block; 54, transmission rod; 55, moving ring; 56, first spring;

[0074] 6, internal measurement assembly; 61, guide frame; 611, through slot; 612, base; 62, transmission frame; 621, connecting shaft; 622, sleeve ring; 63, transmission frame; 64, limiting square rod; 65, connecting arc plate; 66, sliding block;

[0075] 7, outer measuring assembly; 71, mounting frame; 72, connecting plate; 73, limiting ring; 74, fixed plate; 75, clamping part; 751, outer rod; 752, connecting sleeve; 753, self-rotation ball; 754, inner rod; 755, second spring; 756, guide wheel; 757, guide wheel; 758, traction rope; 76, synchronous rod; 77, vertical rod; 771, handle; 78, synchronous part; 79, identification plate;

[0076] a, the elbow part to be detected. DETAILED DESCRIPTION

[0077] The application will be further described in the following examples, but the application is not limited to the examples.

[0078] As Figure 1 shown, the angle measuring mechanism for the part includes a workbench 1, the top of the workbench 1 is fixed with a bearing ring 2 through a connecting piece 11, at least two positioning assemblies 5 which can extend into the inside of the elbow port and are self-centering are slidably connected on the bearing ring 2, and an annular angle scale 21 is arranged on the upper surface of the bearing ring 2.

[0079] The positioning assembly 5 is slidably connected on the bearing ring 2 through a connecting part, the positioning assembly 5 includes three positioning parts which are distributed in a triangular shape, the three positioning parts extend into the inside of the elbow port, and the three positioning parts can be synchronously expanded and contracted.

[0080] The two positioning assemblies 5 in the expanded state extend into the two ports of the elbow part in turn, the three positioning parts on the positioning assembly 5 which extends into the inside of the elbow port are simultaneously compressed inward, the three positioning parts which are distributed in a triangular shape position the center line of the positioning assembly 5 on the center axis of the elbow port, after the two positioning assemblies 5 extend into the elbow part in turn, the elbow part is also positioned, so that self-positioning is realized, at this time, the included angle between the center lines of the two positioning assemblies 5 is the angle of the elbow part, and then the angle of the elbow part is read out through the annular angle scale 21.

[0081] Through the corresponding two positioning assemblies 5, the elbow part can be quickly positioned, so that the angle of the elbow can be quickly measured.

[0082] Example one

[0083] As one of the embodiments in the technical solution, as Figure 2 and Figure 4 shown, the connecting part includes two arc-shaped bearing plates 3, and the two bearing plates 3 are slidably connected on the annular sliding grooves 22 on the upper part and the bottom side wall of the bearing ring 2 respectively.

[0084] A bearing frame 31 is arranged on the inner ring side wall of the bearing ring 2 and connected to the two bearing plates 3, the two bearing plates 3 are arranged symmetrically to each other, a bearing rod group 4 is arranged on the surface center of the bearing frame 31 in the horizontal direction, the bearing plate 3 is slid on the bearing ring 2 through a sliding groove, so that the positioning assembly 5 has the movement ability, which is convenient for positioning the elbow type part, the bearing rod group 4 is composed of at least one columnar rod, the positioning assembly 5 is slidably connected in the end cavity of the bearing rod group 4;

[0085] As shown in Figure 15 , a reading plate 32 is fixed on the bearing plate 3, and the reading plate 32 is located on the top of the angle scale table 21, and the center line of the reading plate 32 and the positioning assembly 5 are in the same vertical plane.

[0086] In the process of positioning the elbow type part, the bearing plate 3 is slid on the sliding groove, so as to drive the positioning assembly 5 to move on the bearing ring 2, so as to facilitate the positioning assembly 5 to extend into the port of the elbow type part.

[0087] After the positioning of the elbow type part is completed, the included angle of the elbow type part is read out through the positions of the two positioning assemblies 5 on the angle scale table 21.

[0088] As shown in Figure 6 , the positioning assembly 5 comprises a mounting rod 51, one end of the mounting rod 51 is slidably connected in the port of the bearing rod group 4, the mounting rod 51 is slid in the port of the bearing rod to move the positioning assembly 5, which is convenient for the positioning assembly 5 to extend into the port cavity of the elbow type part, the other end of the mounting rod 51 is fixed with a connecting block 53, and the surface of the mounting rod 51 is slidably connected with a moving ring 55.

[0089] The positioning part comprises a support rod 52 which is arranged obliquely towards the side of the bearing ring 2, the support rod 52 is rotatably connected to the connecting block 53, one end of a transmission rod 54 is rotatably connected to the middle segment area of the support rod 52, the other end of the transmission rod 54 is rotatably connected to the surface of the moving ring 55, a first spring 56 is sleeved on the surface of the mounting rod 51 between the moving ring 55 and the connecting block 53, and the two ends of the first spring 56 are fixed on the moving ring 55 and the connecting block 53 respectively, when the first spring 56 is not affected by external force, the positioning part is in the state of being spread, and the whole positioning assembly 5 is in the state of being unfolded.

[0090] The support member 521 of the spherical structure is fixed at the end of the support rod 52.

[0091] The end of the support rod 52 is bent to form a curved part which is away from the mounting rod 51, the support member 521 is lifted through the curved part, so as to contact the inner wall of the elbow type part.

[0092] In the process that the positioning assembly 5 extends into the inner cavity of the elbow port, the supporting rod 52 first contacts the end of the elbow part, and the supporting rod 52 rotates to the side direction of the mounting rod 51 in the process that the positioning assembly 5 moves, and the supporting rod 52 pushes the transmission rod 54 to move in the process of rotation, so as to drive the moving ring 55 to move on the surface of the mounting rod 51, realize the transition of the positioning assembly 5 from the unfolded state to the contracted state, and until the supporting pieces 521 on the three positioning parts are all abutted on the inner wall of the elbow port, at this time, the positioning of the elbow port is completed.

[0093] In the above process, the first spring 56 is elongated, and the supporting piece 521 is abutted on the inner wall of the elbow port through the reaction force of the first spring 56.

[0094] In the process of positioning, one of the ports of the elbow is fixed first, and then the other port is fixed.

[0095] Embodiment two

[0096] As one of the embodiments in the technical solution, an inner measurement assembly 6 is arranged on the positioning part, as shown in Figures 7-10 The inner measurement assembly 6 includes a transmission part arranged in the horizontal direction and a limiting part capable of moving the transmission part in the horizontal direction, the transmission part is connected with the supporting piece 521, and the transmission part and the limiting part are connected with each other, the limiting part slides on the mounting rod 51, and adjacent limiting parts are connected with each other through the connecting arc plate 65.

[0097] The transmission part includes two connecting shafts 621 arranged in a collinear manner, both of the two connecting shafts 621 are fixed on the outer surface of the supporting piece 521, and the connecting line between the center lines of the two connecting shafts 621 penetrates the center of the ball of the supporting piece 521, the center line of the connecting shaft 621 penetrates the center of the ball of the supporting piece 521, that is, the distance from the connecting frame to the topmost end point of the supporting piece 521 in the vertical direction is the radius of the connecting piece 11, which is convenient for obtaining the inner diameter of the elbow port, the connecting shaft 621 is perpendicular to the plane in which the rotation track of the corresponding positioning part is located, and the surface of the connecting shaft 621 is sleeved with a sleeve ring 622.

[0098] The transmission frame 62 is bifurcated at one end to form two end rods connected to the two sleeve rings 622 on the same supporting piece 521, and the independent end rod at the other end is connected with the limiting part, and the transmission frame 62 is arranged in the horizontal direction.

[0099] As the positioning part extends into the inside of the bend, the three positioning parts retract inward simultaneously. That is, the support member 521 on the positioning part retracts inward. While the retracting support member 521 drives the transmission part to move inward synchronously, the limiting part causes the transmission frame 62 to move horizontally until the support member 521 on the positioning part touches the inner wall of the bend. At this time, the position of the transmission frame 62 can reflect the inner diameter of the bend.

[0100] The three internal measuring components 6 can measure the inner diameter at three points on the inner wall of the bend, and can obtain multiple data at once, thus improving the accuracy of the measurement results.

[0101] The limiting part includes a "door"-shaped guide frame 61. A transmission frame 63 is provided in the inner cavity of the guide frame 61. The transmission frame 63 is slidably sleeved on the surface of the transmission frame 62, and the inner cavity of the transmission frame 63 is a cuboid structure. Two cuboid limiting rods 64 are fixed on the two symmetrical outer walls of the transmission frame 63 in the horizontal direction. The two limiting rods 64 pass through the through slots 611 on the two outer walls of the guide frame 61. The through slots 611 are also cuboid structures. The limiting rods 64 slide on the through slots 611. A first length scale is provided on the outer wall of the guide frame 61.

[0102] The base 612 is fixed to the bottom of the guide frame 61. The bottom surface of the base 612 is arc-shaped and fits against the surface of the mounting rod 51. Two adjacent bases 612 are connected to each other by a connecting arc plate 65. The connecting arc plate 65 and the base 612 together form an annular structure that fits onto the surface of the mounting rod 51.

[0103] When the support member 521 drives one end of the transmission frame 62 to move, the other end of the transmission frame 62 slides inside the transmission frame 63. The transmission frame 63 keeps the transmission frame 62 in a horizontal position during the process of being driven by the support member 521. At the same time, the transmission frame 63 slides down under the pressure of the transmission frame 62. The limiting square rods 64 on both sides of the transmission frame 63 slide on the through grooves 611 on the guide frame 61, thereby ensuring that the support member 521 drives the transmission frame 62 to remain in a horizontal position during the vertical movement. The inner diameter of the bend is marked on the first length scale by the horizontally moving transmission frame 62.

[0104] An indicator plate for size compensation can be provided on the top of the transmission frame 62, and the top of the reading plate 32 is on the same plane as the topmost end of the support 521 along the vertical direction.

[0105] At least one of the bases 612 has a slider 66 fixed on its arc-shaped bottom surface, and the slider 66 is slidably connected in the guide groove 511 on the mounting rod 51.

[0106] The limiting part can slide on the surface of the mounting rod 51.

[0107] Example three

[0108] As one of the embodiments in the technical solution, as shown in Figure 3 and Figures 11-13 The outer measuring assembly is arranged on the periphery of the positioning assembly 5 and connected to the bearing rod group 4, and comprises two symmetrically arranged and telescopic clamping parts 75 which are clamped on the outer wall of the elbow pipe, and a mark plate 79 is connected to the moving end of the clamping part 75.

[0109] The two clamping parts 75 are arranged vertically, and the connecting line of the central axes between the two clamping parts 75 passes through the center line of the positioning assembly 5.

[0110] The connecting line of the central axes between the two clamping parts 75 passes through the center line of the positioning assembly 5, that is, the connecting line of the central axes between the two clamping parts 75 passes through the center line of the positioned elbow port. When the two clamping parts 75 are both abutted on the outer wall of the elbow pipe, the spacing between the two clamping parts 75 can reflect the outer diameter size of the elbow pipe, thereby completing the measurement of the outer diameter of the elbow pipe.

[0111] The outer measuring assembly further comprises a mounting frame 71 which is wrapped outside the positioning assembly 5, a fixed plate 74 is fixed on the base plate on the mounting frame 71, and the clamping part 75 is fixed on the fixed plate 74.

[0112] Two symmetrically arranged "L"-shaped connecting plates 72 are fixed at one end of the mounting frame 71, and the other end of the connecting plate 72 is fixed on the surface of the limiting ring 73 which is slidingly sleeved on the surface of one of the rod members of the bearing rod group 4.

[0113] The bearing rod group 4 is composed of at least one rod member. When the bearing rod group 4 is composed of two or more rod members, the adjacent two rod members are slidingly sleeved with each other, and the limiting ring 73 is slidingly sleeved on the surface of the rod member close to the positioning assembly 5.

[0114] The rod members constituting the bearing rod group 4 are all of tubular structure.

[0115] Specifically, as shown in Figure 14 The clamping part 75 comprises an inner rod 754 and an outer rod 751 which are slidingly sleeved with each other, the outer rod 751 is sleeved on the surface of the inner rod 754, the inner rod 754 is fixed on the bottom of the fixed plate 74, a second spring 755 is sleeved on the surface of the inner rod 754, and the two ends of the second spring 755 are fixed on the inner rod 754 and the outer rod 751 respectively.

[0116] The bottom end of the outer rod 751 is fixed with a spherical connecting sleeve 752. The connecting sleeve 752 is fitted on the surface of the rotating ball 753. The exposed part of the rotating ball 753 is less than half of the surface area of ​​the rotating ball 753 itself, that is, the rotating ball 753 can rotate in the inner cavity of the connecting sleeve 752.

[0117] The outer rod 751 has a marking plate 79 fixed on its surface. The top edge of the outer edge of the rotating ball 753 near the positioning group is on the same horizontal plane as the end of the marking plate 79, and the end of the marking plate 79 points to the second length scale on the connecting plate 72 on the same side.

[0118] Both clamping parts 75 are clamped on the surface of the bent tube. The rebound force of the second spring 755 causes the rotating ball 753 on the clamping part 75 to press against the outer wall of the bent tube. The distance between the contact points between the two rotating balls 753 and the outer wall of the bent tube is the outer diameter of the bent tube. The distance between the two marking plates 79 is the outer diameter of the bent tube at the point being measured. The distance between the two marking plates 79 is the outer diameter of the bent tube at the point being measured.

[0119] At the same time, by rotating the connecting plate 72 and the mounting bracket 71, the two clamping parts 75 are driven to rotate on the outer wall of the bend, thereby enabling continuous multi-point measurement of the outer wall of the bend and obtaining multiple sets of data to facilitate the judgment of the manufacturing accuracy of bend-type parts.

[0120] Preferred, such as Figure 13 As shown, it also includes a traction unit, which includes a traction rope 758. One end of the traction rope 758 passes through the fixing plate 74 and the inner rod 754 in sequence and is connected to the inner cavity end side wall of the outer rod 751. The other end of the traction rope 758 passes vertically over the top of the guide wheel 756 and the bottom of the guide wheel 757 in sequence and is connected to the synchronization rod 76 arranged in the horizontal direction. The guide wheel 756 and the guide wheel 757 are both mounted on the fixing plate 74. The synchronization rod 76 passes through the connecting plate 72 and is connected to the vertical rod 77.

[0121] Two vertical rods 77 corresponding to the two clamping parts 75 are connected by a synchronizing member 78, which is wrapped around the outside of the bearing rod group 4. A handle 771 is fixed on the vertical rod 77.

[0122] The traction unit drives the two clamping parts 75 to retract towards the side away from the positioning component 5, and then moves the entire outer measuring component 7 until the clamping part 75 moves to the designated position outside the bend. The traction unit no longer restrains the clamping part 75, and the clamping part 75 extends under the action of the second spring 755 until the clamping part 75 is clamped on the outer wall of the bend.

[0123] The vertical rod 77 is pulled by the hand 771 to move to the side direction away from the positioning assembly 5, and the vertical rod 77 drives the traction rope 758 connected therewith to move, and the outer rod 751 connected with the traction rope 758 moves to the side direction away from the positioning assembly 5, and the outer rod 751 slides on the surface of the inner rod 754, and the clamping part 75 is contracted.

[0124] In the above process, the second spring 755 is compressed.

[0125] The present application is not limited to the above-mentioned embodiments, and any changes in shape or structure fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims, and those skilled in the art can make various changes or modifications to the embodiments without departing from the principles and essence of the present application, and such changes and modifications fall within the scope of the present application.

Claims

1. An angular measuring mechanism for a part, comprising a worktable (1), characterized in that: The workbench (1) top is fixed with a bearing ring (2) through a connecting piece (11), at least two positioning assemblies (5) which can extend into the internal of the elbow port and are self-centering are slidably connected on the bearing ring (2), and an annular angle scale (21) is arranged on the upper surface of the bearing ring (2); The positioning assembly (5) is slidably connected on the bearing ring (2) through a connecting part, the positioning assembly (5) comprises three positioning parts which are distributed in a triangular shape, the three positioning parts extend into the internal of the elbow port, and the three positioning parts can be synchronously expanded and contracted; The connecting part comprises two arc-shaped bearing plates (3), and the two bearing plates (3) are slidably connected on the annular sliding grooves (22) on the upper part and the bottom sidewall of the bearing ring (2); A bearing frame (31) is arranged on the inner ring sidewall of the bearing ring (2) and is connected on the two bearing plates (3), the two bearing plates (3) are symmetrically arranged, a bearing rod group (4) which is arranged in the horizontal direction is fixed on the surface center of the bearing frame (31), the bearing rod group (4) is composed of at least one columnar rod, and the positioning assembly (5) is slidably connected in the end internal cavity of the bearing rod group (4); A reading plate (32) is fixed on the bearing plate (3) and is located on the top of the angle scale (21), and the center line of the reading plate (32) and the positioning assembly (5) are in the same vertical plane; The positioning assembly (5) comprises a mounting rod (51), one end of the mounting rod (51) is slidably connected in the internal of the port of the bearing rod group (4), the other end of the mounting rod (51) is fixed with a connecting block (53), and a moving ring (55) is slidably connected on the surface of the mounting rod (51); The positioning part comprises a support rod (52) which is arranged in a slanting manner towards one side of the bearing ring (2), the support rod (52) is rotatably connected on the connecting block (53), one end of a transmission rod (54) is rotatably connected on the middle segment area of the support rod (52), the other end of the transmission rod (54) is rotatably connected on the surface of the moving ring (55), a first spring (56) is sleeved on the surface of the mounting rod (51) between the moving ring (55) and the connecting block (53), and the two ends of the first spring (56) are fixed on the moving ring (55) and the connecting block (53) respectively; A support piece (521) in a spherical structure is fixed on the end of the support rod (52).

2. The angular measurement mechanism for a part of claim 1, wherein: An internal measuring assembly (6) is further arranged on the positioning part, the internal measuring assembly (6) comprises a transmission part which is arranged in the horizontal direction and a limiting part which can move the transmission part in the horizontal direction, the transmission part and the support piece (521) are connected with each other, the transmission part and the limiting part are transmissionally connected with each other, the limiting part slides on the mounting rod (51), and adjacent limiting parts are connected with each other through connecting arc plates (65).

3. The angular measurement mechanism for a part of claim 2, wherein: The transmission part comprises two connection shafts (621) arranged in a collinear manner, both of which are fixed on the outer surface of the support member (521), and the line connecting the center lines of the two connection shafts (621) passes through the center of the support member (521), the connection shaft (621) is perpendicular to the plane in which the positioning part rotation track is located, and the surface of the connection shaft (621) is sleeved with a collar (622); The transmission frame (62) is bifurcated at one end to form two end rods respectively connected to the two collars (622) on the same support member (521), and the independent end rod at the other end is connected to the limiting part, and the transmission frame (62) is arranged in a horizontal direction.

4. The angular measurement mechanism for a part of claim 3, wherein: The limiting part comprises a guide frame (61) in the shape of a "door", a transmission frame (63) is arranged in the inner cavity of the guide frame (61), the transmission frame (63) is sleeved on the surface of the transmission frame (62) in a sliding manner, two symmetrical outer walls of the transmission frame (63) in the horizontal direction are both fixed with a limiting square rod (64) in the shape of a square, the two limiting square rods (64) respectively pass through the through slot (611) on the outer wall on both sides of the guide frame (61), the through slot (611) is also in the shape of a square, the limiting square rod (64) slides on the through slot (611), and a first length scale is arranged on the outer wall of the guide frame (61); A base (612) is fixed on the bottom of the guide frame (61), the bottom surface of the base (612) is arc-shaped and adheres to the surface of the mounting rod (51), and adjacent two bases (612) are connected to each other through a connecting arc plate (65).

5. The angular measurement mechanism for a part of claim 1, wherein: It also comprises an external measurement assembly arranged on the periphery of the positioning assembly (5) and connected to the bearing rod group (4), the external measurement assembly comprises two symmetrical and telescopic clamping parts (75) arranged on the outer wall of the elbow pipe, and a mark plate (79) is connected to the moving end of the clamping part (75); Both of the two clamping parts (75) are arranged in a vertical direction, and the line connecting the center axes of the two clamping parts (75) passes through the center line of the positioning assembly (5).

6. The angular measurement mechanism for a part of claim 5, wherein: The external measurement assembly further comprises a mounting frame (71) wrapped outside the positioning assembly (5), a fixed plate (74) is fixed on the base plate on the mounting frame (71), and the clamping part (75) is fixed on the fixed plate (74); Two symmetrical "L"-shaped connecting plates (72) are arranged, one end of the connecting plate (72) is fixed on the mounting frame (71), and the other end of the connecting plate (72) is fixed on the surface of the limiting ring (73), and the limiting ring (73) is sleeved on the surface of one rod of the bearing rod group (4) in a sliding manner.

7. The angular measurement mechanism for a part of claim 6, wherein: The clamping part (75) comprises an inner rod (754) and an outer rod (751) sleeved with each other, the outer rod (751) is sleeved on the surface of the inner rod (754), the inner rod (754) is fixed on the bottom of the fixed plate (74), the surface of the inner rod (754) is sleeved with a second spring (755), and two ends of the second spring (755) are fixed on the inner rod (754) and the outer rod (751) respectively; The bottom end of the outer rod (751) is fixed with a connecting sleeve (752) of a spherical surface structure, the connecting sleeve (752) is sleeved on the surface of the self-rotating ball (753), and the exposed part of the self-rotating ball (753) is less than one half of the surface area of the self-rotating ball (753) itself; The surface of the outer rod (751) is fixed with an identification plate (79), the outer edge top end of the self-rotating ball (753) close to the positioning group side is on the same horizontal plane with the end of the identification plate (79), and the end of the identification plate (79) points to the second length scale table on the same side connecting plate (72).

8. The angular measurement mechanism for a part of claim 7, wherein: The traction part comprises a traction rope (758), one end of the traction rope (758) passes through the fixed plate (74), the inner rod (754) and is connected to the inner cavity end wall of the outer rod (751), the other end of the traction rope (758) is connected with the synchronous rod (76) arranged in the horizontal direction by passing through the top of the guide wheel (756) and the bottom of the guide wheel (757) in the vertical direction, the guide wheel (756) and the guide wheel (757) are both installed on the fixed plate (74), and the synchronous rod (76) is connected with the vertical rod (77) after penetrating through the connecting plate (72); The two vertical rods (77) corresponding to the two clamping parts (75) are connected through the synchronizing part (78), the synchronizing part (78) is wrapped outside the bearing rod group (4), and the vertical rod (77) is fixed with a handle (771).

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