Angle measuring mechanism for part

Abstract

The invention provides an angle measuring mechanism for a part, which comprises a workbench, a bearing ring is fixed at the top of the workbench through a connecting piece, at least two self-centering positioning assemblies capable of extending into the port of a bent pipe are slidably connected to the bearing ring, and an annular angle dial gauge is arranged on the upper surface of the bearing ring; the positioning assembly is connected to the bearing ring in a sliding mode through a connecting part, the positioning assembly comprises three positioning parts distributed in a delta shape, and the three positioning parts stretch into the end opening of the bent pipe and can be synchronously unfolded and contracted. The invention provides an elbow pipe angle rapid measuring device based on double positioning assemblies. Efficient, self-positioning and accurate measurement of elbow pipe parts can be realized. Precise positioning of the center line of the port is achieved through the three positioning parts distributed in the shape of the Chinese character'pin ', and the measurement result is visually displayed through the annular angle dial gauge. The device has a self-adaptive function and can be compatible with bent pipe parts of different specifications.

Description

Technical Field

[0001] This invention relates to the field of angle measurement, specifically to an angle measuring mechanism for parts. Background Technology

[0002] In industrial manufacturing sectors such as automotive, aerospace, shipbuilding, and piping, bent pipe components are widely used in fluid transport, structural support, and spatial layout optimization. The accuracy of the bend angle is crucial for the component's installation precision and system performance. Therefore, measuring the angle of bent pipe components is a vital step in ensuring product quality.

[0003] Traditional methods for measuring pipe bending angles typically rely on manual operation, using simple angle gauges or laser measuring devices. While these methods meet basic requirements, they suffer from the following problems:

[0004] (1) Difficulty in positioning: Due to the complex shape of the bend, the central axis of the port is often difficult to align accurately, resulting in a large error in the measurement angle.

[0005] (2) Low measurement efficiency: Traditional measurement methods require repeated adjustments to equipment or measurement positions, which is difficult to adapt to the needs of fast and efficient batch measurement in production lines.

[0006] (3) Poor adaptability: Different specifications and shapes of bent pipes require separate adjustment of measuring tools or fixtures, which complicates the operation and affects efficiency.

[0007] (4) Unstable measurement results: Due to the influence of human operating experience, the stability of measuring tools and the external environment, the consistency and reliability of measurement results are difficult to guarantee.

[0008] To address these issues, the industry has attempted to improve measurement accuracy and efficiency by introducing automated measurement equipment or refining the structure of measurement tools. However, existing solutions are often complex, costly, and fail to balance versatility and ease of use. Therefore, developing a simple, user-friendly pipe bending angle measuring device capable of rapid self-positioning and accurate measurement has become a pressing technical challenge for the industry.

[0009] Therefore, an angle measuring mechanism for parts is provided to address the above-mentioned problems. Summary of the Invention

[0010] This invention provides an angle measurement mechanism for parts to address the problems of difficult positioning, low efficiency, poor adaptability, and unstable results in existing methods for measuring the angle of bent pipes.

[0011] The present invention solves the above-mentioned technical problems through the following technical solutions:

[0012] The present invention provides an angle measuring mechanism for parts, including a worktable, a bearing ring fixed to the top of the worktable by a connector, at least two self-centering positioning components that can extend into the inside of a bent pipe port are slidably connected to the bearing ring, and an annular angle scale is provided on the upper surface of the bearing ring.

[0013] The positioning component is slidably connected to the bearing ring via a connecting part. The positioning component includes three positioning parts arranged in a triangular pattern. The three positioning parts extend into the inside of the bent pipe port, and the three positioning parts can be expanded and contracted synchronously.

[0014] Two positioning components in the unfolded state are inserted into the two ends of the bent tube-shaped part in sequence. The three positioning parts on the positioning components inserted into the bent tube ends are simultaneously compressed inward. The three positioning parts, which are arranged in a triangular pattern, position the center line of the positioning components to the central axis at the bent tube end. After the two positioning components are inserted into the bent tube-shaped part in sequence, the bent tube-shaped part is also positioned, thus achieving self-positioning. At this time, the included angle between the center lines of the two positioning components is the angle of the bent tube-shaped part. Then, the angle of the bent tube-shaped part is read through the angle scale of the annular structure.

[0015] The two corresponding positioning components can be used to quickly locate the bent tube-shaped parts, thereby allowing for rapid measurement of the bend angle.

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

[0017] A support frame extends beyond the inner ring sidewall of the support ring and is connected to two support plates. The two support plates are symmetrically arranged. A support rod assembly arranged in a horizontal direction is fixed at the center of the surface of the support frame. The support plates slide on the support ring through a sliding groove, thereby enabling the positioning component to move and facilitating the positioning of bent pipe parts. The support rod assembly consists of at least one columnar rod, and the positioning component is slidably connected to the inner cavity at the end of the support rod assembly.

[0018] A reading plate is fixed on a support plate and located at the top of an angle scale. The reading plate and the center line of the positioning component are on the same vertical plane.

[0019] During the positioning of bent pipe parts, the support plate slides on the slide groove, thereby driving the positioning component to move on the support ring, so that the positioning component can be inserted into the port of the bent pipe part.

[0020] After positioning the bent pipe parts, the included angle of the bent pipe parts can be read by observing the position of the reading plates corresponding to the two positioning components on the angle scale.

[0021] In this technical solution, the positioning component includes a mounting rod. One end of the mounting rod is slidably connected to the inside of the bearing rod assembly port. The positioning component is moved by sliding the mounting rod inside the bearing rod port, which facilitates the positioning component to extend into the port cavity of the bent pipe-like part. A connecting block is fixed to the other end of the bearing rod assembly, and a movable ring is slidably connected to the surface of the bearing rod assembly.

[0022] The positioning part includes a support rod inclined toward the bearing ring side. The support rod is rotatably connected to the connecting block. One end of the transmission rod is rotatably connected to the middle section of the support rod. The other end of the transmission rod is rotatably connected to the surface of the moving ring. A first spring is sleeved on the surface of the mounting rod between the moving ring and the connecting block. The two ends of the first spring are respectively fixed to the moving ring and the connecting block. When the first spring is not subjected to external force, the positioning part is in the open state, and the entire positioning assembly is in the unfolded state.

[0023] A spherical support member, which is fixed to the end of a support rod.

[0024] Furthermore, it also includes an internal measuring component disposed on the positioning part. The internal measuring component includes a transmission part disposed in the horizontal direction and a limiting part that allows the transmission part to move in the horizontal direction. The transmission part is connected to the support member and the transmission part and the limiting part are connected to each other in a driving connection. The limiting part slides on the mounting rod, and adjacent limiting parts are connected to each other through a connecting arc plate.

[0025] The transmission part includes two connecting shafts that are collinearly distributed. Both connecting shafts are fixed on the outer surface of the support member, and the line connecting the center lines of the two connecting shafts passes through the center of the ball of the support member. The center line of the connecting shaft passes through the center of the ball of the support member. That is, the distance from the connecting frame to the topmost point of the support member in the vertical direction is the radius of the connecting member, which makes it easy to determine the inner diameter of the bend port. The connecting shaft and the plane where the rotation trajectory of the corresponding positioning part is located are perpendicular to each other. The surface of the connecting shaft is fitted with a collar.

[0026] The transmission frame has one end forked into two end rods that are respectively connected to two collars on the same support member, and the other end of the independent end rod is connected to the limiting part, and the transmission frame is arranged in a horizontal direction.

[0027] The three internal measuring components can measure the inner diameter at three points on the inner wall of the bend, allowing for multiple data acquisitions at once and improving the accuracy of the measurement results.

[0028] Furthermore, the limiting part includes a "door"-shaped guide frame, and a transmission frame is provided in the inner cavity of the guide frame. The transmission frame is slidably sleeved on the surface of the transmission frame, and the inner cavity of the transmission frame is a cuboid structure. Two cuboid limiting rods are fixed on the two symmetrical outer walls of the transmission frame in the horizontal direction. The two limiting rods pass through the through slots on the two outer walls of the guide frame, and the through slots are also cuboid structures. The limiting rods slide on the through slots. A first length scale is provided on the outer wall of the guide frame.

[0029] The base is fixed to the bottom of the guide frame. The bottom surface of the base is arc-shaped and fits against the surface of the mounting rod. Adjacent bases are connected to each other by connecting arc plates. The connecting arc plates and the bases together form a ring structure that fits onto the surface of the mounting rod.

[0030] When the support component moves one end of the transmission frame, the other end of the transmission frame slides inside the transmission frame. The transmission frame keeps the transmission frame in a horizontal position throughout the process of being driven by the support component. At the same time, the transmission frame slides down under the pressure of the transmission frame, and the limiting square rods on both sides of the transmission frame slide on the through grooves on the guide frame. This ensures that the support component keeps the transmission frame in a horizontal position throughout the vertical movement. The inner diameter of the bend is marked on the first length scale by the horizontally moving transmission frame.

[0031] This technical solution also includes an external measuring component, which is disposed around the positioning component and connected to the bearing rod assembly. The external measuring component includes two symmetrically arranged and retractable clamping parts, which clamp onto the outer wall of the bent pipe, and a marking plate is connected to the moving end of the clamping part.

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

[0033] The line connecting the central axes of the two clamping parts passes through the center line of the positioning component, that is, the line connecting the central axes of the two clamping parts passes through the center line of the positioned bend port. When both clamping parts are against the outer wall of the bend, the distance between the two clamping parts can reflect the outer diameter of the bend, thus completing the measurement of the outer diameter of the bend.

[0034] Specifically, the external measuring component also includes a mounting bracket, which is wrapped around the positioning component. A fixing plate is fixed on the pad on the mounting bracket, and a clamping part is fixed on the fixing plate.

[0035] Two symmetrically arranged "L"-shaped connecting plates, one end of which is fixed to the mounting bracket and the other end of which is fixed to the surface of the limiting ring. The limiting ring is slidably sleeved on the surface of one of the rods in the bearing rod assembly.

[0036] Specifically, the clamping part includes an inner rod and an outer rod that slide and are sleeved together. The outer rod is sleeved on the surface of the inner rod, the inner rod is fixed on the bottom of the fixing plate, and a second spring is sleeved on the surface of the inner rod. The two ends of the second spring are respectively fixed on the inner rod and the outer rod.

[0037] The bottom end of the outer rod is fixed with a spherical connecting sleeve. The connecting sleeve is fitted on the surface of the rotating sphere. The exposed part of the rotating sphere is less than half of the surface area of ​​the rotating sphere itself, that is, the rotating sphere can rotate in the inner cavity of the connecting sleeve.

[0038] The outer rod is fixed with a marking plate. The top edge of the outer edge of the rotating ball near the positioning group is on the same horizontal plane as the end of the marking plate, and the end of the marking plate points to the second length scale on the connecting plate on the same side.

[0039] By rotating the connecting plate and mounting bracket, the two clamping parts 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 help determine the manufacturing accuracy of bend-type parts.

[0040] Furthermore, it also includes a traction unit, which includes a traction rope. One end of the traction rope passes through the fixed plate and the inner rod in sequence and is connected to the inner cavity end side wall of the outer rod. The other end of the traction rope passes vertically over the top and bottom of the guide wheel in sequence and is connected to the synchronization rod arranged in the horizontal direction. The guide wheel and the guide wheel are both mounted on the fixed plate. The synchronization rod passes through the connecting plate and is connected to the vertical rod.

[0041] The two vertical rods corresponding to the two clamping parts are connected by a synchronizing element, which is wrapped around the outside of the bearing rod assembly. A handle is fixed on the vertical rod.

[0042] The traction unit drives the two clamping parts to retract towards the side away from the positioning component. Then, the entire outer measuring component is moved until the clamping parts move to the designated position outside the bend. The traction unit no longer restrains the clamping parts, and the clamping parts extend under the action of the second spring until the clamping parts are clamped on the outer wall of the bend.

[0043] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0044] This invention provides a rapid angle measurement device for curved tubular parts based on dual positioning components, which can achieve efficient, self-positioning, and accurate angle measurement of curved tubular parts. Its beneficial effects are as follows:

[0045] (1) Rapid positioning and precise measurement

[0046] Through the coordinated action of two positioning components that can extend into the bend port, the three positioning parts on the positioning components are arranged in a triangular shape and can compress inward simultaneously, accurately positioning the centerline of the positioning components onto the central axis of the bend port. Simultaneously with positioning, the bend-shaped part is automatically adjusted to the measurement state, enabling rapid measurement of the bend angle, significantly improving measurement efficiency and accuracy, making it particularly suitable for batch measurement needs in production lines.

[0047] (2) Adaptive design and strong compatibility

[0048] Because the three positioning parts on the positioning assembly have an inward compression function, they can adapt to the actual size and shape changes of the bent pipe port, and can be compatible with bent pipe parts of different specifications without additional adjustment, which significantly improves the versatility and adaptability of the device.

[0049] (3) Angle measurement is intuitive and accurate

[0050] The angle of the bend can be read in real time using an angle scale with a ring structure, avoiding the cumbersome calculation steps and human error problems of traditional measurement methods. This design not only provides an intuitive angle display, but also ensures high reliability and high accuracy of angle measurement, effectively improving the stability and repeatability of measurement results.

[0051] (4) Simple structure and easy to use

[0052] This device employs a simple mechanical structure design, avoiding the use of complex electronic components, and boasts advantages such as low cost and convenient maintenance. Furthermore, the operation process is simple; positioning and angle measurement can be completed simply by inserting the positioning components sequentially into both ends of the curved pipe. No professional skills are required, making it suitable for operators to quickly apply in various scenarios. Attached Figure Description

[0053] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0054] Figure 2 This is a schematic diagram showing the positional relationship between the bent pipe part to be detected in this invention and the positioning component;

[0055] Figure 3 This is a schematic diagram of the overall structure of the external measurement component of the present invention;

[0056] Figure 4 This is a schematic diagram showing the positional relationship between the bent pipe part to be detected and the positioning component with external measuring components in this invention;

[0057] Figure 5 This is a bottom view of the structure of the worktable of the present invention;

[0058] Figure 6 This is a schematic diagram of the positioning component of the present invention;

[0059] Figure 7 This is a schematic diagram of the positioning component with an internal measurement component of the present invention;

[0060] Figure 8 This is a side view of the positioning component with an internal measurement component of the present invention.

[0061] Figure 9 This is a rear view structural schematic diagram of the positioning component with internal measurement component of the present invention;

[0062] Figure 10 This is a schematic diagram of the front side view of the positioning component with internal measurement component of the present invention;

[0063] Figure 11 This is a side view of the overall structure of the present invention;

[0064] Figure 12 For the present invention Figure 11 Schematic diagram of the cross-sectional structure at point AA;

[0065] Figure 13 This is a cross-sectional schematic diagram of the external measuring component of the present invention;

[0066] Figure 14 This is a schematic diagram of the clamping part of the present invention;

[0067] Figure 15 For the present invention Figure 4 A magnified schematic diagram of the structure at point I.

[0068] Explanation of reference numerals in the attached figures

[0069] 1. Workbench; 11. Connector; 2. Bearing ring; 21. Angle scale; 22. Annular groove; 3. Bearing plate; 31. Bearing frame; 32. Reading plate; 4. Bearing rod assembly; 5. Positioning assembly; 51. Mounting rod; 511. Guide groove; 52. Support rod; 521. Support component; 53. Connecting block; 54. Transmission rod; 55. Moving ring; 56. First spring; 6. Internal measuring assembly; 61. Guide frame; 611. Through groove; 612. Base; 62. Transmission frame; 621. Connecting shaft; 622. Collar; 6 3. Transmission frame; 64. Limiting square rod; 65. Connecting arc plate; 66. Slider; 7. External measuring assembly; 71. Mounting bracket; 72. Connecting plate; 73. Limiting ring; 74. Fixing plate; 75. Clamping part; 751. Outer rod; 752. Connecting sleeve; 753. Rotating ball; 754. Inner rod; 755. Second spring; 756. Guide wheel; 757. Guide wheel; 758. Traction rope; 76. Synchronizing rod; 77. Vertical rod; 771. Handle; 78. Synchronizing component; 79. Marking plate; a. Bent pipe parts to be inspected. Detailed Implementation

[0070] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments.

[0071] like Figure 1 As shown, the angle measuring mechanism for parts includes a worktable 1. A bearing ring 2 is fixed to the top of the worktable 1 by a connector 11. At least two self-centering positioning components 5 that can extend into the inside of the bent pipe port are slidably connected to the bearing ring 2. An annular angle scale 21 is provided on the upper surface of the bearing ring 2.

[0072] The positioning component 5 is slidably connected to the bearing ring 2 via a connecting part. The positioning component 5 includes three positioning parts arranged in a triangular shape. The three positioning parts extend into the inside of the bent pipe port, and the three positioning parts can be expanded and contracted synchronously.

[0073] Two positioning components 5 in the unfolded state are inserted into the two ports of the bent tube-shaped part in sequence. The three positioning parts on the positioning components 5 inserted into the port of the bent tube are simultaneously compressed inward. The three positioning parts distributed in a triangular shape position the center line of the positioning components 5 to the central axis at the port of the bent tube. After the two positioning components 5 are inserted into the bent tube-shaped part in sequence, the bent tube-shaped part is also positioned, thereby achieving self-positioning. At this time, the included angle between the center lines of the two positioning components 5 is the angle of the bent tube-shaped part. Then, the angle of the bent tube-shaped part is read through the angle scale 21 of the annular structure.

[0074] The two corresponding positioning components 5 can be used to quickly position the bent tube-shaped parts, thereby allowing the angle of the bend to be measured quickly.

[0075] Example 1

[0076] As one embodiment of this technical solution, such as Figure 2 and Figure 4 As shown, the connecting part includes two arc-shaped support plates 3, and the two support plates 3 are slidably connected to the annular grooves 22 on the upper part and the bottom side wall of the support ring 2, respectively.

[0077] The support frame 31 extends beyond the inner ring sidewall of the support ring 2 and is connected to two support plates 3. The two support plates 3 are symmetrically arranged. A support rod group 4 arranged in a horizontal direction is fixed at the center of the surface of the support frame 31. The support plates 3 slide on the support ring 2 through the sliding groove, thereby enabling the positioning component 5 to move and facilitating the positioning of bent pipe parts. The support rod group 4 is composed of at least one columnar rod. The positioning component 5 is slidably connected in the inner cavity of the end of the support rod group 4.

[0078] like Figure 15As shown, the reading plate 32 is fixed on the support plate 3 and is located at the top of the angle scale 21. The reading plate 32 and the center line of the positioning component 5 are on the same vertical plane.

[0079] During the positioning of bent pipe parts, the support plate 3 slides on the slide groove, thereby driving the positioning component 5 to move on the support ring 2, so that the positioning component 5 can extend into the port of the bent pipe part.

[0080] After the positioning of the bent pipe part is completed, the included angle of the bent pipe part can be read by the position of the reading plate 32 corresponding to the two positioning components 5 on the angle scale 21.

[0081] like Figure 6 As shown, the positioning component 5 includes a mounting rod 51. One end of the mounting rod 51 is slidably connected to the inside of the port of the bearing rod group 4. The positioning component 5 can be moved by sliding the mounting rod 51 inside the port of the bearing rod, so that the positioning component 5 can be inserted into the port cavity of the bent pipe part. The other end of the bearing rod group 4 is fixed with a connecting block 53, and a moving ring 55 is slidably connected to the surface of the bearing rod group 4.

[0082] The positioning part includes a support rod 52 inclined towards the bearing ring 2. The support rod 52 is rotatably connected to the connecting block 53. One end of the transmission rod 54 is rotatably connected to the middle section 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. The two ends of the first spring 56 are respectively fixed to the moving ring 55 and the connecting block 53. When the first spring 56 is not subjected to external force, the positioning part is in the open state, and the entire positioning assembly 5 is in the unfolded state.

[0083] A spherical support member 521 is fixed to the end of the support rod 52.

[0084] The end of the support rod 52 is bent away from the support rod 51 to form a raised curved part. The curved part lifts the support member 521 so that the support member 521 can contact the inner wall of the bent tube part.

[0085] During the process of the positioning component 5 extending into the inner cavity of the bent pipe port, the support rod 52 first contacts the end of the bent pipe part. As the positioning component 5 moves, the support rod 52 rotates towards the side of the mounting rod 51. During the rotation, the support rod 52 pushes the transmission rod 54 to move, thereby driving the moving ring 55 to move on the surface of the mounting rod 51, realizing the transition of the positioning component 5 from the unfolded state to the retracted state, until the support members 521 on the three positioning parts all abut against the inner wall of the bent pipe port, at which point the positioning of the bent pipe port is completed.

[0086] During the above process, the first spring 56 is stretched, and the reaction force of the first spring 56 causes the support 521 to abut against the inner wall of the bend port.

[0087] When positioning, first fix one port of the bend, and then fix the other port.

[0088] Example 2

[0089] As one embodiment of this technical solution, it also includes an internal measuring component 6 disposed on the positioning part, such as... Figure 7-10 As shown, the internal measuring component 6 includes a transmission part arranged in the horizontal direction and a limiting part that allows the transmission part to move in the horizontal direction. The transmission part is connected to the support member 521, and the transmission part and the limiting part are connected to each other in a driving connection. The limiting part slides on the mounting rod 51, and adjacent limiting parts are connected to each other through a connecting arc plate 65.

[0090] The transmission part includes two collinearly distributed connecting shafts 621. Both connecting shafts 621 are fixed on the outer surface of the support member 521, and the line connecting the center lines of the two connecting shafts 621 passes through the center of the ball of the support member 521. The center line of the connecting shaft 621 passes through the center of the ball of the support member 521. That is, the distance from the connecting frame to the top vertical end of the support member 521 is the radius of the connecting member 11, which makes it easy to determine the inner diameter of the bend port. The connecting shaft 621 is perpendicular to the plane where the rotation trajectory of the corresponding positioning part is located. A collar 622 is sleeved on the surface of the connecting shaft 621.

[0091] The transmission frame 62 has one end forked into two end rods that are respectively connected to two collars 622 on the same support member 521, and the other end of the independent end rod is connected to the limiting part. The transmission frame 62 is arranged in a horizontal direction.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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 a ring structure that fits onto the surface of the mounting rod 51.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] The limiting part can slide on the surface of the mounting rod 51.

[0100] Example 3

[0101] As one embodiment of this technical solution, such as Figure 3 as well as Figure 11-13 As shown, it also includes an external measuring component, which is disposed around the positioning component 5 and connected to the bearing rod group 4. The external measuring component includes two symmetrically arranged and retractable clamping parts 75, which are clamped on the outer wall of the bent pipe, and a marking plate 79 is connected to the moving end of the clamping part 75.

[0102] Both clamping parts 75 are arranged vertically, and the line connecting the central axes of the two clamping parts 75 passes through the center line of the positioning component 5.

[0103] The line connecting the central axes of the two clamping parts 75 passes through the center line of the positioning component 5, that is, the line connecting the central axes of the two clamping parts 75 passes through the center line of the positioned bent pipe port. When both clamping parts 75 are against the outer wall of the bent pipe, the distance between the two clamping parts 75 can reflect the outer diameter of the bent pipe, thereby completing the measurement of the outer diameter of the bent pipe.

[0104] The external measuring component also includes a mounting bracket 71, which is wrapped around the outside of the positioning component 5. A fixing plate 74 is fixed on the pad on the mounting bracket 71, and a clamping part 75 is fixed on the fixing plate 74.

[0105] Two symmetrically arranged "L"-shaped connecting plates 72, one end of which is fixed to the mounting bracket 71, and the other end of which is fixed to the surface of the limiting ring 73. The limiting ring 73 is slidably sleeved on the surface of one of the rods in the bearing rod group 4.

[0106] The load-bearing rod group 4 consists of at least one rod. When the load-bearing rod group 4 consists of two or more rods, the two adjacent rods are slidably sleeved with each other, and the limiting ring 73 is slidably sleeved on the surface of the rod near the positioning component 5.

[0107] All the members constituting the load-bearing rod group 4 are tubular structures.

[0108] Specifically, such as Figure 14 As shown, the clamping part 75 includes an inner rod 754 and an outer rod 751 that are slidably sleeved on 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 fixing plate 74. A second spring 755 is sleeved on the surface of the inner rod 754. The two ends of the second spring 755 are respectively fixed on the inner rod 754 and the outer rod 751.

[0109] 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.

[0110] The outer rod 751 is fixed with a marking plate 79. 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.

[0111] 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 of measurement. The distance between the two marking plates 79 is the outer diameter of the bent tube at the point of measurement.

[0112] 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.

[0113] 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.

[0114] 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.

[0115] 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 binds 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.

[0116] By pulling the handle 771, the vertical rod 77 is moved away from the positioning component 5. The vertical rod 77 drives the traction rope 758 connected to it to move. The outer rod 751 connected to the traction rope 758 then moves away from the positioning component 5. The outer rod 751 slides on the surface of the inner rod 754, and the clamping part 75 retracts.

[0117] During the above process, the second spring 755 is compressed.

[0118] This invention is not limited to the embodiments described above. Any changes in shape or structure shall fall within the protection scope of this invention. The protection scope of this invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of this invention, but all such changes and modifications shall fall within the protection scope of this invention.

Claims

1. An angle measuring mechanism for parts, comprising a worktable (1), characterized in that: The top of the workbench (1) is fixed with a bearing ring (2) by a connector (11). At least two self-centering positioning components (5) that can extend into the inside of the bent pipe port are slidably connected on the bearing ring (2). The upper surface of the bearing ring (2) is provided with an annular angle scale (21). The positioning component (5) is slidably connected to the bearing ring (2) through the connecting part. The positioning component (5) includes three positioning parts distributed in a triangular shape. The three positioning parts extend into the inside of the bent pipe port, and the three positioning parts can be expanded and contracted synchronously.

2. The angle measuring mechanism for parts as described in claim 1, characterized in that: The connecting part includes two arc-shaped support plates (3), and the two support plates (3) are slidably connected to the annular grooves (22) on the upper part and bottom side wall of the support ring (2); The support frame (31) extends beyond the inner ring sidewall of the support ring (2) and is connected to two support plates (3). The two support plates (3) are symmetrically arranged. A support rod group (4) arranged in the horizontal direction is fixed at the center of the surface of the support frame (31). The support rod group (4) is composed of at least one columnar rod. A positioning component (5) is slidably connected in the inner cavity of the end of the support rod group (4). The reading plate (32) is fixed on the support plate (3) and is located at the top of the angle scale (21). The center line of the reading plate (32) and the positioning component (5) are on the same vertical plane.

3. The angle measuring mechanism for parts as described in claim 2, characterized in that: The positioning component (5) includes a mounting rod (51), one end of which is slidably connected to the inside of the port of the bearing rod assembly (4), and the other end of the bearing rod assembly (4) is fixed with a connecting block (53). A movable ring (55) is slidably connected to the surface of the bearing rod assembly (4). The positioning part includes a support rod (52) inclined toward the bearing ring (2) side. The support rod (52) is rotatably connected to the connecting block (53). One end of the transmission rod (54) is rotatably connected to the middle section 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). The two ends of the first spring (56) are respectively fixed on the moving ring (55) and the connecting block (53). A spherical support member (521) is fixed to the end of a support rod (52).

4. The angle measuring mechanism for parts as described in claim 3, characterized in that: It also includes an internal measuring component (6) disposed on the positioning part. The internal measuring component (6) includes a transmission part disposed in the horizontal direction and a limiting part that allows the transmission part to move in the horizontal direction. The transmission part is connected to the support member (521) and the transmission part and the limiting part are connected to each other in a driving connection. The limiting part slides on the mounting rod (51) and adjacent limiting parts are connected to each other through a connecting arc plate (65).

5. The angle measuring mechanism for parts as described in claim 4, characterized in that: The transmission unit includes two collinearly distributed connecting shafts (621). Both connecting shafts (621) are fixed on the outer surface of the support member (521), and the line connecting the center lines of the two connecting shafts (621) passes through the center of the ball of the support member (521). The connecting shafts (621) are perpendicular to the plane where the rotation trajectory of the corresponding positioning part is located. A collar (622) is sleeved on the surface of the connecting shafts (621). The transmission frame (62) has one end forked to form two end rods that are respectively connected to two collars (622) on the same support member (521), and the other end of the independent end rod is connected to the limiting part, and the transmission frame (62) is arranged in a horizontal direction.

6. The angle measuring mechanism for parts as described in claim 5, characterized in that: The limiting part includes a "door" shaped guide frame (61), and 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). A cuboid-shaped limiting rod (64) is 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 grooves (611) on both sides of the outer wall of the guide frame (61). The through grooves (611) are also cuboid in structure. The limiting rods (64) slide on the through grooves (611). A first length scale is provided on the outer wall of the guide frame (61). 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 connecting arc plates (65).

7. The angle measuring mechanism for parts as described in claim 1, characterized in that: It also includes an external measuring component, which is set around the positioning component (5) and connected to the bearing rod group (4). The external measuring component includes two symmetrically arranged and retractable clamping parts (75), which are clamped on the outer wall of the bend, and a label plate (79) is connected to the moving end of the clamping part (75). Both clamping parts (75) are arranged vertically, and the line connecting the central axes of the two clamping parts (75) passes through the center line of the positioning component (5).

8. The angle measuring mechanism for parts as described in claim 7, characterized in that: The external measuring component also includes a mounting bracket (71), which is wrapped around the outside of the positioning component (5). A fixing plate (74) is fixed on the pad on the mounting bracket (71), and a clamping part (75) is fixed on the fixing plate (74). Two symmetrically arranged "L"-shaped connecting plates (72) are provided. One end of the connecting plate (72) is fixed on the mounting bracket (71), and the other end of the connecting plate (72) is fixed on the surface of the limiting ring (73). The limiting ring (73) is slidably sleeved on the surface of one of the rods in the bearing rod group (4).

9. The angle measuring mechanism for parts as described in claim 8, characterized in that: The clamping part (75) includes an inner rod (754) and an outer rod (751) that are slidably sleeved together. 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 fixing plate (74). A second spring (755) is sleeved on the surface of the inner rod (754). The two ends of the second spring (755) are respectively fixed on the inner rod (754) and the outer rod (751). The bottom end of the outer rod (751) is fixed with a spherical connecting sleeve (752), which 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). 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.

10. The angle measuring mechanism for a part as described in claim 9, characterized in that: It also includes a traction unit, which includes a traction rope (758). One end of the traction rope (758) passes through the fixed plate (74) and the inner rod (754) in sequence and is connected to the inner end side wall of the outer rod (751). The other end of the traction rope (758) passes through the top of the guide wheel (756) and the bottom of the guide wheel (757) in sequence in the vertical direction and is connected to the synchronous rod (76) arranged in the horizontal direction. The guide wheel (756) and the guide wheel (757) are both installed on the fixed plate (74). The synchronous rod (76) passes through the connecting plate (72) and is connected to the vertical rod (77). 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).

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