Measuring device for inner spherical surface of ball seat
The ball seat inner surface measurement device addresses inefficiencies in existing methods by using a vertical movement mechanism and three-jaw measurement claws to efficiently and accurately measure inner spherical surfaces, reducing the need for costly three-coordinate machines.
Patent Information
- Application Number
- CN202510621190.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-14
- Publication Date
- 2025-07-15
AI Technical Summary
In the prior art, the size detection of the spherical surface in the focal mount is difficult, traditional detection tools cannot effectively measure it, and the three-coordinate instruments are priced and small in quantity, resulting in low detection frequency and inability to detect defective products in time.
A spherical measurement device in the ball seat is designed, including a work table, a clamping part, a measuring end and a vertical moving part. Through a three-claw measuring claw, the inner contour dimension of the inner spherical surface is measured in real time, and the claw body adjustment mechanism and data acquisition unit are combined to achieve efficient measurement.
It improves the efficiency of spherical measurement in the focal mount, can measure multiple parameters simultaneously, reduces the detection cost, and achieves efficient and accurate inner spherical detection.
Smart Images
Figure CN120313541A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of inner spherical surface measurement, and particularly relates to a measuring device for the inner spherical surface of a ball seat. Background Art
[0002] The ball joint of the lower arm of an automobile is an important part of the chassis suspension system. It elastically connects the vehicle body and the axle, playing a role in buffering the impact force from the road surface during vehicle driving and improving the riding comfort.
[0003] The ball joint of the lower swing arm of an automobile includes a ball head and a ball seat. During the processing of the ball seat and the ball head, it is necessary to detect the dimensions of the ball head and the ball seat. The ball head can be detected by a micrometer and a vernier caliper. However, since the ball seat has a spherical surface structure inside, traditional detection tools can only detect the non-spherical dimensions inside the ball seat, and it is difficult to detect the spherical dimensions. It is necessary to detect by a coordinate measuring machine. However, due to the high price of the coordinate measuring machine, factories are generally equipped with fewer of them. Therefore, the detection tasks of the coordinate measuring machine are generally very heavy. For the detection of a certain product, it is impossible to detect each batch and take multiple samples, that is, the number of detection samples is small and the detection frequency is low. When defective products appear, they cannot be found in time. Therefore, the present application proposes a measuring device for the inner spherical surface of a ball seat. Summary of the Invention
[0004] The purpose of the present invention is to provide a measuring device for the inner spherical surface of a ball seat to solve the problem of high difficulty in detecting the dimensions of the inner spherical surface of the ball seat in the current lower ball head.
[0005] To achieve the above purpose, the present invention provides the following technical solutions: A measuring device for the inner spherical surface of a ball seat, including a workbench. The workbench includes a vertical support and a horizontal tabletop. A clamping part is arranged on the horizontal tabletop to clamp the workpiece. The measuring device further includes: A measuring end. The measuring end includes a connecting seat, three measuring claws and a claw body adjusting mechanism. The measuring claws are evenly distributed circumferentially around the axis of the connecting seat. The measuring claw includes a fixed claw hinged on the connecting seat and a lever sensor fixedly connected to the end of the fixed claw away from the connecting seat. The claw body adjusting mechanism is connected to the measuring claw and the connecting seat to drive the measuring claw to rotate on the connecting seat; A vertical moving part fixedly connected to the vertical support. The connecting seat is fixedly connected to the output end of the vertical moving part. The vertical moving part is used to drive the measuring end to move up and down; A control part and a data acquisition unit. The control part is used to control the operation of the measuring claw and the vertical moving part. The data acquisition unit is electrically connected to the lever sensor to acquire the detection data of the lever sensor.
[0006] Further, a polygonal central hole is provided at the center of the connecting seat, and the claw body adjusting mechanism includes: A core rod slidably connected within the central hole, the core rod being a polygonal rod; A hinge seat fixedly connected to the end of the core rod, an external thread being provided at one end of the core rod away from the hinge seat; A connecting rod, the two ends of the connecting rod being respectively hinged to the hinge seat and the fixed claw; A threaded tube sleeved on the core rod; An adjusting motor, the output end of the adjusting motor being fixedly connected to one end of the threaded tube away from the core rod, the adjusting motor being fixedly connected to the connecting seat. When the adjusting motor rotates, the core rod moves along its axis under the drive of the threaded tube.
[0007] Further, the vertical moving part includes: A fixed housing, the fixed housing being cylindrical; A moving housing slidably connected within the fixed housing, the moving housing being cylindrical, the end of the moving housing being fixedly connected to the measuring end, at least two groups of limiting grooves (evenly distributed around the axis of the moving housing) being provided on the outer side of the moving housing, and limiting blocks cooperating with the limiting grooves being provided within the fixed housing to enable it to move only along its own axis; A worm gear threaded sleeve rotatably connected within the fixed housing, an external thread being provided on the outer side of the moving housing, an internal thread being provided on the inner side of the worm gear threaded sleeve, and the worm gear threaded sleeve being threadedly connected to the moving housing; A worm rotatably connected within the fixed housing, the worm meshing with the outer worm gear part of the worm gear threaded sleeve; A moving motor fixedly connected to the fixed outer shell for driving the worm to rotate.
[0008] Further, the vertical moving part further includes; A rotating part for driving the measuring end to rotate to measure the circular runout of the inner spherical surface.
[0009] Further, the rotating part includes: A rotating housing, the rotating housing being cylindrical with openings at both ends, the rotating housing being fixedly connected to the connecting seat; A first motor seat fixedly connected to the end of the rotating housing away from the connecting seat; A limiting plate, the limiting plate being rotatably connected to the first motor seat, the limiting plate being fixedly connected to the moving housing; A rotating motor fixedly connected to the inside of the moving housing, and an output shaft of the rotating motor is fixedly connected to an end of the first motor base away from the rotating housing.
[0010] Furthermore, the workbench further includes: A clamping table, and the clamping part is fixedly connected to the clamping table; A horizontal adjustment part and a universal support, the horizontal adjustment part and the universal support are connected between the clamping tables, the universal support is arranged at the central position of the clamping table, and the horizontal adjustment part is used to adjust the inclination angle of the clamping table.
[0011] Furthermore, the universal support is a ball head structure, a support ball seat is fixedly connected to the clamping table, the universal support includes a support column fixedly connected to the horizontal table and a support ball head fixedly connected to an end of the support column, and the support ball seat is sleeved on the support ball head; The horizontal adjustment part is an electric telescopic structure, there are three groups of horizontal adjustment seats, and the three groups of horizontal adjustment seats are evenly distributed circumferentially around the axis of the universal support of the clamping table. Two ends of the horizontal adjustment part are respectively connected to the horizontal tabletop and the clamping table through ball pin structures, and the inclination angle of the clamping table is adjusted by the telescopic movement of the horizontal adjustment part.
[0012] Furthermore, the horizontal adjustment part includes: An inclined support tube, the inclined support tube is in a cylindrical shape with an opening at one end, the closed end of the inclined support tube is connected to the horizontal tabletop through a ball pin structure, and an inner retaining ring is arranged at the opening of the inclined support tube; An axially-shaped electromagnet fixedly connected to the inside of the inclined support tube, and the axially-shaped electromagnet is located at the bottom of the inclined support tube; A movable support, one end of the movable support is located inside the inclined support tube, and the other end is connected to the clamping table through a ball pin structure. A permanent magnet is fixedly connected to the end of the movable support located inside the inclined support tube, and the axially-shaped electromagnet repels the permanent magnet after being energized; A compression spring located inside the inclined support tube, the compression spring is sleeved on the movable support, and two ends of the compression spring abut against the inner retaining ring and the end of the movable support.
[0013] Furthermore, the clamping part includes: A clamping seat, the clamping seat is disc-shaped, there are three groups of limit sliding grooves evenly distributed circumferentially around the axis of the clamping seat on the clamping seat, and plugs are fixed at the ends of the limit sliding grooves close to the outside; A clamping slider slidably connected in the limit sliding groove, a clamping rod is vertically arranged on the clamping slider, and a tension spring is connected between the plug and the clamping slider; Clamping cover, three groups of limiting holes evenly distributed circumferentially around the axis of the clamping cover are arranged on the side of the clamping cover. The limiting holes are waist-shaped holes. A limiting screw is connected to the outside of the clamping seat by a thread. The limiting screw is located in the limiting hole. Three groups of arc-shaped holes evenly distributed circumferentially around the axis of the clamping cover are also arranged on the end face of the clamping cover. The arc-shaped holes are divergently arranged. The clamping rod is located in the arc-shaped holes. When the clamping cover rotates, it drives the clamping slider to slide in the limiting chute.
[0014] Further, the clamping rod is detachably connected to the clamping slider.
[0015] In summary, compared with the prior art, the present invention has the following beneficial effects: The spherical seat inner spherical surface measuring device disclosed in the embodiment of the present invention controls the three-jaw measuring claw to move along the axis of the spherical seat inner spherical surface through the vertical moving part. During the movement, the measuring claw measures the radius of the sectional circle of the inner spherical surface along different sections in real time, so as to measure the inner contour size of the inner spherical surface. Compared with the traditional measuring structure, the present invention has the advantages of high measuring efficiency and the ability to measure multiple parameters simultaneously. Description of the Drawings
[0016] Figure 1 It is a schematic structural diagram of the spherical seat inner spherical surface measuring device disclosed in the embodiment of the present invention.
[0017] Figure 2 It is the front view of the spherical seat inner spherical surface measuring device disclosed in the embodiment of the present invention.
[0018] Figure 3 It is Figure 2 The sectional view taken along A-A in
[0019] Figure 4 It is Figure 3 The partial enlarged view at I in
[0020] Figure 5 It is Figure 3 The partial enlarged view at II in
[0021] Figure 6 It is Figure 3 The partial enlarged view at III in
[0022] Figure 7 It is a schematic overall structural diagram of the vertical moving part and the measuring end in the spherical seat inner spherical surface measuring device disclosed in the embodiment of the present invention.
[0023] Figure 8 It is a schematic internal structural diagram of the clamping part in the spherical seat inner spherical surface measuring device disclosed in the embodiment of the present invention.
[0024] Figure 9Schematic diagram of the structure of the horizontal adjustment part in the inner spherical surface measuring device disclosed in the embodiment of the present invention.
[0025] Figure 10 Schematic diagram of the structure of the limit screw in the inner spherical surface measuring device disclosed in the embodiment of the present invention.
[0026] Figure 11 Schematic diagram of the structure of the measuring end in the inner spherical surface measuring device disclosed in the embodiment of the present invention.
[0027] Figure 12 Schematic diagram of the structure of the measuring end and the rotating part in the inner spherical surface measuring device disclosed in the embodiment of the present invention.
[0028] Figure 13 Partial schematic diagram of the structure of the vertical moving part in the inner spherical surface measuring device disclosed in the embodiment of the present invention.
[0029] Reference numerals: 100, workbench; 110, vertical support; 120, horizontal tabletop; 130, clamping table; 131, support ball seat; 132, ball seat cover; 140, horizontal adjustment part; 141, inclined support tube; 142, movable support; 143, permanent magnet; 144, compression spring; 145, axial electromagnet; 146, shaft cover; 150, universal support; 151, support column; 152, support ball head; 200, vertical moving part; 210, fixed housing; 211, lower housing; 212, upper housing; 213, dust cover; 220, moving housing; 221, limit groove; 230, worm gear thread sleeve; 240, worm; 250, moving motor; 260, rotating part; 261, rotating housing; 262, first motor base; 263, limit plate; 264, second motor base; 265, rotating motor; 300, clamping part; 310, clamping cover; 311, handle; 312, arc hole; 320, clamping seat; 321, limit sliding groove; 330, limit screw; 340, clamping slider; 341, clamping rod; 350, plug; 360, tension spring; 400, measuring end; 410, connecting seat; 420, measuring claw; 421, fixed claw; 422, lever sensor; 423, positioning groove; 424, positioning block; 425, fastening nail; 430, claw body adjusting mechanism; 431, core rod; 432, hinge seat; 433, connecting rod; 434, threaded tube; 435, adjusting motor. Detailed implementation manners
[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0031] As Figures 1 to 4 shown, a spherical surface measuring device inside a ball seat provided by an embodiment of the present invention includes a workbench 100, a vertical moving part 200, a clamping part 300, and a measuring end 400. The workbench 100 includes a vertical support 110 and a horizontal platform 120. The vertical moving part 200 is arranged on the vertical support 110. The clamping part 300 is arranged on the horizontal platform 120. The measuring end 400 is arranged on the vertical moving part 200. The vertical moving part 200 is used to drive the measuring end 400 to move up and down. The clamping part 300 is used to clamp a workpiece. Among them, the measuring end 400 includes a connecting seat 410, three groups of measuring claws 420, and a claw body adjusting mechanism 430. The connecting seat 410 is fixedly connected to the output end of the vertical moving part 200. The measuring claws 420 are evenly distributed circumferentially around the axis of the connecting seat 410. The measuring claws 420 include a fixed claw 421 hinged to the connecting seat 410 and a lever sensor 422 fixedly connected to the end of the fixed claw 421 away from the connecting seat 410. The claw body adjusting mechanism 430 is connected to the measuring claws 420 and the connecting seat 410 to drive the measuring claws 420 to rotate on the connecting seat 410. The measuring device further includes a control part and a data acquisition unit. The control part is used to control the operation of the measuring claws 420 and the vertical moving part 200. The data acquisition unit is electrically connected to the lever sensor 422 to acquire the detection data of the lever sensor 422.
[0032] In this embodiment, when measuring the inner spherical surface, the workpiece is clamped by the clamping portion 300. First, the measuring claws 420 are controlled to contract by the claw body adjusting mechanism 430, so that the measuring heads of the lever sensors 422 approach each other. The measuring end 400 is controlled to move downward by the vertical moving portion 200, and the measuring heads of the lever sensors 422 penetrate into the inner spherical surface. The measuring program is started, and the control portion controls the measuring claws 420 to rotate outward through the claw body adjusting mechanism 430 until the lever sensors 422 detect a preset reading, indicating that the measuring heads of the lever sensors 422 abut against the side wall of the inner spherical surface. The radius of the inner spherical surface is calculated through the built-in mapping function (the functional relationship between the preset reading and the control parameters in the claw body adjusting mechanism 430 and the actually measured inner diameter). The vertical moving portion 200 drives the measuring end 400 to move along the axis of the inner spherical surface, so as to read the radius change of the inner spherical surface along the axis, and then obtain the inner contour of the inner spherical surface. Through the inner contour of the inner spherical surface, the coaxiality, radius, etc. of each inner spherical surface can be judged, and whether the processing of the inner spherical surface is qualified can be judged. When moving the measuring claws 420 into the workpiece, it can be realized by manually controlling the operation of the vertical moving portion 200.
[0033] The inner spherical surface measuring device disclosed in the embodiment of the present invention controls the three-jaw measuring claws 420 to move along the axis of the inner spherical surface of the ball seat through the vertical moving portion 200. During the movement, the measuring claws 420 measure the radii of the sectional circles of the inner spherical surface along different sections in real time, so as to measure the inner contour dimensions of the inner spherical surface. Compared with the traditional measuring structure, the present invention has the advantages of high measuring efficiency and the ability to measure multiple parameters simultaneously.
[0034] Specifically, in this embodiment, as Figure 1 shown, the workbench 100 includes a vertical support 110 and a horizontal table 120. The vertical support 110 is fixedly connected to the horizontal table 120 by screws. The vertical support 110 is an L-shaped structure with an arc-shaped corner at the turning point, so that the vertical support 110 is convenient to grasp. The vertical moving portion 200 is fixedly connected to the end of the vertical support 110 away from the horizontal table 120 by bolts. A connecting surface is provided at the end of the vertical support 110 to connect the vertical moving portion 200.
[0035] As a preferred implementation manner in this embodiment, the workbench 100 further includes a clamping table 130, a horizontal adjustment part 140, and a universal support 150. The clamping part 300 is fixed on the clamping table 130. The clamping table 130 is connected to the horizontal table 120 through the horizontal adjustment part 140 and the universal support 150. The horizontal adjustment part 140 is used to adjust the inclination angle of the clamping table 130, so that the movement track of the measuring end 400 is collinear with the axis of the inner spherical surface of the workpiece. Due to errors in the casting of the workpiece, fixture, and the frame, when the clamping part 300 clamps the workpiece, it is impossible to ensure that the inner spherical surface and the vertical moving part 200 are coaxial with a single clamping, and multiple clamps will reduce the detection efficiency. To further improve the measurement efficiency and achieve the purpose of being able to measure after a single clamping, this embodiment sets the horizontal adjustment part 140 to adjust the inclination angle of the clamping table 130. During the process of adjusting the inclination angle of the clamping table 130, by reading the measurement values of the three lever sensors 422, the measurement values of the three lever sensors 422 are made the same. At this time, the plane where the measurement heads of the three lever sensors 422 are located is perpendicular to the axis of the inner spherical surface of the workpiece, that is, the movement track of the measuring end 400 is collinear with the axis of the inner spherical surface of the workpiece. When the vertical moving part 200 controls the movement of the measuring end 400, the measuring end 400 can move along the axis of the inner spherical surface of the workpiece; Specifically, the clamping table 130 is of a flat plate structure, the universal support 150 is of a ball head structure. A support ball seat 131 is fixedly connected to the clamping table 130. The universal support 150 includes a support column 151 fixedly connected to the horizontal table 120 and a support ball head 152 fixedly connected to the end of the support column 151 away from the horizontal table 120. The support ball seat 131 is sleeved on the support ball head 152. A ball seat cover 132 is fixedly connected to the support ball seat 131 through bolts so that the support ball head 152 is clamped inside the support ball seat 131, so that the clamping table 130 can only rotate around the center of the ball of the support ball head 152. The ball seat cover 132 is annular, and the ball seat cover 132 is fixedly connected to the support ball seat 131 through bolts. Three groups of horizontal adjustment parts 140 are provided, and the three groups of horizontal adjustment parts 140 are evenly distributed circumferentially around the axis of the support column 151. The horizontal adjustment part 140 is an electric telescopic structure. The two ends of the horizontal adjustment part 140 are respectively hinged to the clamping table 130 and the horizontal table 120 through ball pin structures. The axis of the horizontal adjustment part 140 is vertical to the axis of the clamping table 130 (in the in-situ state, that is, at this time the clamping table 130 is parallel to the horizontal table 120). According to the principle that three points determine a plane, by respectively adjusting the telescopic lengths of the three groups of horizontal adjustment parts 140, the inclination angle of the clamping table 130 can be adjusted. The universal support 150 plays the role of supporting and limiting the clamping table 130; Preferably, as Figure 4 and Figure 9 shown, the horizontal adjustment part 140 includes an inclined support tube 141, a movable support 142, a permanent magnet 143, a compression spring 144 and an axial electromagnet 145. The inclined support tube 141 is a cylindrical body with an opening at one end. An inner retaining ring is provided at the opening of the inclined support tube 141. A first ball head is provided at the end of the inclined support tube 141 far from the opening. The axial electromagnet 145 is fixedly connected to the bottom end inside the inclined support tube 141 by means of gluing or screwing. One end of the movable support 142 is slidably connected inside the inclined support tube 141. The permanent magnet 143 is fixedly connected to the end of the movable support 142 located inside the movable support 142 by means of gluing or screwing. After the axial electromagnet 145 is energized, it repels the movable support 142. The compression spring 144 is sleeved on the part of the movable support 142 located inside the inclined support tube 141. Both ends of the compression spring 144 abut against the end of the movable support 142 and the inner retaining ring. When the axial electromagnet 145 is not energized, the axial electromagnet 145 attracts the movable support 142. At this time, the clamping table 130 is parallel to the horizontal table 120. A second ball head is provided at the end of the movable support 142 far from the inclined support tube 141. The second ball head is connected to the clamping table 130. A first ball pin seat is provided on the horizontal table 120. A second ball pin seat is provided on the clamping table 130. The first ball pin seat is connected to the first ball head, and the second ball pin seat is connected to the second ball head. Both the first ball pin seat and the second ball pin seat are made of plastic. Since plastic has a certain elasticity, during installation, the first ball head and the second ball head can be directly pressed into the first ball pin seat and the second ball pin seat, making the horizontal adjustment part 140 easy to replace; The axial electromagnet 145 includes a coil and an iron core. The coil is wound around the outside of the iron core. The shape of the axial electromagnet 145 is axial; Since the magnetism of the axial electromagnet 145 is related to the magnitude of the current, when controlling the extension of the movable support 142, by applying a voltage to the axial electromagnet 145, the axial electromagnet 145 repels the permanent magnet 143, and the compression spring 144 is compressed. The repulsive force of the compression spring 144 and the axial electromagnet 145 forms a balance. When a preset magnitude of pressure is applied, the elongation length of the movable support 142 can be obtained through calculation or experiment. Therefore, when adjusting the inclination angle of the clamping table 130, by applying different magnitudes of voltage to different axial electromagnets 145, the clamping table 130 is tilted on the universal support 150, thereby adjusting the angle of the workpiece; Preferably, the end of the inclined support tube 141 far from the opening is sealed by a shaft cover 146, so that the inclined support tube 141 forms a cylindrical shape with an opening at one end. The shaft-shaped electromagnet 145 is fixedly connected to the shaft cover 146. The shaft cover 146 is fixedly connected to the inclined support tube 141 by threaded connection. The first ball head and the shaft cover 146 are of an integral structure. The second ball head is threadedly connected to the movable support 142.
[0036] In this embodiment, the clamping part 300 is fixedly connected to the clamping table 130 by screws, as Figure 1 、 Figure 2 and Figure 8As shown, the clamping part 300 includes a clamping cover 310 and a clamping base 320. The clamping cover 310 is in the shape of a round cover, and the clamping base 320 is in the shape of a disc. The clamping base 320 is fixedly connected to the clamping table 130 by screws. When the clamping table 130 is horizontal, the axis of the clamping base 320 is collinear with the moving track of the measuring end 400. There are three groups of limiting sliding grooves 321 evenly distributed circumferentially around the axis of the clamping base 320 on the clamping base 320. The limiting sliding grooves 321 are T-shaped grooves. The ends of the three groups of limiting sliding grooves 321 coincide on the axis of the clamping base 320. A clamping slider 340 is slidably connected in the limiting sliding groove 321. A vertically arranged clamping rod 341 (taking the workbench 100 placed on a horizontal measuring table as an example) is fixedly connected to the clamping slider 340. A plug 350 is fixed at the end of the limiting sliding groove 321 close to the outside. The plug 350 is located in the open groove provided at the end of the clamping base 320 in the limiting sliding groove 321. When the clamping cover 310 is buckled on the clamping base 320, the plug 350 is located between the clamping cover 310 and the clamping base 320. A tension spring 360 is connected between the plug 350 and the clamping slider 340. The two ends of the tension spring 360 are hooked on the clamping slider 340 and the plug 350. Three groups of limiting holes evenly distributed circumferentially around the axis of the clamping cover 310 are provided on the side of the clamping cover 310. The limiting holes are waist-shaped holes. A limiting screw 330 is threadedly connected to the outside of the clamping base 320. The limiting screw 330 is located in the limiting hole. The limiting screw 330 is used to fix the clamping cover 310 so that the clamping cover 310 can only rotate a preset angle along the axis of the clamping base 320. Three groups of arc-shaped holes 312 evenly distributed circumferentially around the axis of the clamping cover 310 are also provided on the end face of the clamping cover 310. The arc-shaped holes 312 are divergently arranged. The clamping rod 341 is located in the arc-shaped holes 312. When the clamping cover 310 rotates, it drives the clamping slider 340 to slide in the limiting sliding groove 321. A handle 311 is also fixedly connected to the outside of the clamping cover 310. The handle 311 facilitates the user to rotate the clamping cover 310; As Figure 10 shown, a cylindrical limiting section is provided at the middle position of the limiting screw 330. The limiting section is slidably connected in the limiting hole; Taking Figure 1The clamping block 310 is pressed against the locking cam 341 to release the locking cam 342, and the locking cam 343 is pressed against the locking cam 344 to release the locking cam 346. Preferably, the clamping rod 341 is detachably connected to the clamping slider 340 via a threaded structure, so that the clamping rod 341 can be easily replaced with different lengths to adapt to ball head seats of different sizes.
[0037] As a preferred implementation in this embodiment, Figure 1 and Figure 11 As shown, the connecting seat 410 is disc-shaped, and a hexagonal center hole is provided at the center of the connecting seat 410. One end of the fixing claw 421 is hinged on the connecting seat 410, and the other end of the fixing claw 421 is fixedly connected to the lever sensor 422. A square positioning groove 423 is provided at the end of the fixing claw 421 away from the connecting seat 410, and a square positioning block 424 is provided at the end of the lever sensor 422. The positioning block 424 is inserted into the positioning groove 423. The lever sensor 422 and the positioning groove 423 are connected by a fastening nail 425. The fastening nail 425 passes through the fixing claw 421 and the lever sensor 422. The positioning groove 423, the positioning block 424 and the fastening nail 425 are used to limit the lever sensor 422, so that the lever sensor 422 can be replaced without shaking during measurement. Preferably, the claw body adjusting mechanism 430 includes a core rod 431, a hinge seat 432, a connecting rod 433, a threaded tube 434 and an adjusting motor 435. The core rod 431 is a hexagonal prism rod, and the core rod 431 is slidably connected in the central hole. The hinge seat 432 is located at the end of the core rod 431. Two ends of the connecting rod 433 are respectively hinged to the hinge seat 432 and the fixed claw 421. The hinge seat 432 and the core rod 431 are of an integral structure or are fixedly connected by screws. The core rod 431 can only slide along its axis under the limitation of the central hole. An external thread is provided at the end of the core rod 431 away from the hinge seat 432. The threaded tube 434 is sleeved on the core rod 431. One end of the threaded tube 434 away from the core rod 431 is fixedly connected to the output end of the adjusting motor 435 through a key shaft structure. The adjusting motor 435 is fixedly connected to the connecting seat 410. When the adjusting motor 435 rotates, the core rod 431 moves along its axis driven by the threaded tube 434, so as to push the hinge seat 432 to move linearly. The hinge seat 432 drives the fixed claw 421 to swing through the connecting rod 433, so as to adjust the measuring range of the measuring end 400; In this embodiment, as Figure 6 and Figure 12 as Figure 12 shown, the adjusting motor 435 is fixedly connected to the connecting seat 410 through a rotating housing 261. The rotating housing 261 is a cylindrical shape with openings at both ends. Two ends of the rotating housing 261 are respectively fixedly connected to the connecting seat 410 and the adjusting motor 435 through bolts; It should be noted that the shape of the core rod 431 and the shape of the central hole can also be other polygons, such as a square.
[0038] As a preferred implementation manner in this embodiment, as Figure 1 、 Figure 7 and Figure 12 、 Figure 13As shown, the vertical moving part 200 includes a fixed housing 210, a moving housing 220, a worm gear thread sleeve 230, a worm 240, and a moving motor 250. The fixed housing 210 is integrally cylindrical. An installation structure for the worm gear thread sleeve 230, the worm 240, and the limiting structure of the worm 240 is provided in the middle part of the fixed housing 210. The fixed housing 210 is fixedly connected to the vertical support 110 by bolts. The moving housing 220 is cylindrical. The end of the moving housing 220 is fixedly connected to the measuring end 400. At least two groups (three groups are provided in this embodiment) of limiting grooves 221 evenly distributed around the axis of the moving housing 220 are provided on the outer side of the moving housing 220. The limiting grooves are arranged along the axis direction of the moving housing 210. Limiting blocks matching the limiting grooves 221 are provided in the fixed housing 210, so that the moving housing 220 cannot rotate. External threads are provided on the outer side of the moving housing 220, and internal threads are provided on the inner side of the worm gear thread sleeve 230. The worm gear thread sleeve 230 is threadedly connected to the moving housing 220, so that when the worm gear thread sleeve 230 rotates, it can drive the moving housing 220 to move along its axis. The worm 240 is rotatably connected in the fixed housing 210. The worm 240 meshes with the worm gear thread sleeve 230. The moving motor 250 is fixedly connected to the fixed housing 210 by bolts. The output shaft of the moving motor 250 is connected to the worm 240 by a key shaft to drive the worm 240 to rotate. When it is necessary to move the measuring end 400, the moving motor 250 drives the worm 240 to rotate, the worm 240 drives the worm gear thread sleeve 230 to rotate, and the worm gear thread sleeve 230 drives the moving housing 220 to move, thereby driving the measuring end 400 to move; Specifically, as Figure 3 and Figure 5 shown, the fixed housing 210 includes a lower housing 211 and an upper housing 212. Both the lower housing 211 and the upper housing 212 are cylindrical with openings at both ends. The lower housing 211 and the upper housing 212 are connected by a flange structure. One end of the lower housing 211 and the upper housing 212 where they are connected has a larger opening, and annular limiting steps are provided in both the lower housing 211 and the upper housing 212 to install the worm gear thread sleeve 230, so that the worm gear thread sleeve 230 can only rotate around its own axis. A cylindrical structure communicating with the inside of the lower housing 211 is also provided on the side of the lower housing 211 near the end of the fixed housing 210. The worm 240 is rotatably connected to the cylindrical structure. The moving motor 250 is fixedly connected to the cylindrical structure by a flange structure, and the moving motor 250 also serves as a sealing cover for the cylindrical structure; One end of the upper housing 212 away from the lower housing 211 is further provided with a dust cover 213. The dust cover 213 is a rubber cover. The dust cover 213 is fixed to the inner side of the upper housing 212 through a slot structure. The horizontal platform 120 is sleeved on the lower housing 211, and the horizontal platform 120 is fixedly connected to the lower housing 211 by screws; When the vertical moving part 200 controls the measuring end 400 to move along the axis, by reading the readings of the three lever sensors 422, the radius of each section of the circle can be calculated, and the coaxiality of the inner spherical surface can also be detected.
[0039] As a preferred implementation mode in this embodiment, as Figure 6 and Figure 12 shown, the vertical moving part 200 further includes a rotating part 260. The rotating part 260 is used to drive the measuring end 400 to rotate, so as to detect the circular runout of the inner spherical surface; When detecting the circular runout of the inner spherical surface, the rotating part 260 drives the measuring end 400 to rotate, and by reading the reading of one of the lever sensors 422, the circular runout of the inner spherical surface can be read; Preferably, the rotating part 260 includes a rotating housing 261, a first motor base 262, a limiting plate 263, a second motor base 264 and a rotating motor 265. The rotating housing 261 is in a cylindrical shape with openings at both ends. Both the first motor base 262 and the second motor base 264 are in a cylindrical structure. The rotating housing 261 is fixedly connected to the connecting seat 410 by screws. The first motor base 262 is fixedly connected to one end of the rotating housing 261 away from the connecting seat 410 by screws. The adjusting motor 435 is fixedly connected inside the first motor base 262. A connecting ring is arranged between the first motor base 262 and the rotating housing 261. The adjusting motor 435 is fixedly connected to the connecting ring by screws. One end of the first motor base 262 away from the rotating housing 261 is fixedly connected to the output shaft of the rotating motor 265 by key shaft fitting. The limiting plate 263 is in an annular structure. The limiting plate 263 is rotatably connected to one end of the first motor base 262 away from the rotating housing 261 by an elastic circlip. A connecting pipe is arranged at one end of the first motor base 262 away from the rotating housing 261. The rotating motor 265 and the limiting plate 263 are arranged on the connecting pipe. The second motor base 264 is in a cylindrical structure. The edge of the second motor base 264 and the limiting plate 263 are fixedly connected to the end of the moving housing 220 by screws. The rotating motor 265 is located inside the moving housing 220. The moving housing 220 is in a cylindrical shape with openings at both ends. The rotating motor 265 is fixedly connected to the second motor base 264 by screws. The rotating housing 261, the first motor base 262, the limiting plate 263, the second motor base 264 and the rotating motor 265 are coaxially arranged; When controlling the rotation of the measuring end 400, the rotating motor 265 drives the connecting seat 410 to rotate through the first motor base 262 and the rotating housing 261, so as to control the rotation of the measuring end 400.
[0040] In this embodiment, in order to reduce the measurement error caused by assembly error, when establishing the mapping function, the relationship between the measured value and the control function can be established by means of machine training. For example, a measuring block with a standard size (a ring structure with a preset inner diameter) is set. Taking the control values of the vertical moving part 200 and the claw body adjusting mechanism 430 as independent variables and the measured value as the dependent variable, by measuring the size of the standard block, recording the measured value of the lever sensor 422, the rotation position of the adjusting motor 435, the shaft positions of the moving motor 250 and the rotating motor 265 at this size, etc., through multiple measurements, the mapping function is established by means of function fitting, so that the measured value can be directly calculated by reading the control parameters during measurement.
[0041] The terms used in the present invention are for the purpose of describing particular embodiments only and are not intended to limit the present invention. The singular forms "a", "the" and "said" as used in the present invention and the appended claims are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
[0042] It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to a determination".
[0043] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A measuring device for the inner spherical surface of a tee, comprising a workbench, the workbench including a vertical support and a horizontal tabletop, and a clamping portion is provided on the horizontal tabletop to clamp a workpiece, characterized in that, It further includes: A measuring end, the measuring end includes a connecting seat, three groups of measuring claws and a claw body adjusting mechanism. The measuring claws are evenly distributed circumferentially around the axis of the connecting seat. The measuring claws include fixed claws hinged to the connecting seat and lever sensors fixedly connected to the ends of the fixed claws away from the connecting seat. The claw body adjusting mechanism is connected to the measuring claws and the connecting seat to drive the measuring claws to rotate on the connecting seat; A vertical moving part fixedly connected to the vertical support. The connecting seat is fixedly connected to the output end of the vertical moving part. The vertical moving part is used to drive the measuring end to move up and down; A control part and a data acquisition unit. The control part is used to control the working of the measuring claws and the vertical moving part. The data acquisition unit is electrically connected to the lever sensor to collect the detection data of the lever sensor.
2. The spherical surface measuring device for the tee according to claim 1, wherein, A polygonal center hole is provided at the center of the connecting seat. The claw body adjusting mechanism includes: A core rod slidably connected in the center hole. The core rod is a polygonal rod body; A hinge seat fixedly connected to the end of the core rod. An external thread is provided at the end of the core rod away from the hinge seat; A connecting rod, the two ends of the connecting rod are respectively hinged to the hinge seat and the fixed claw; A threaded tube sleeved on the core rod; An adjusting motor, the output end of the adjusting motor is fixedly connected to the end of the threaded tube away from the core rod. The adjusting motor is fixedly connected to the connecting seat. When the adjusting motor rotates, the core rod moves along its axis driven by the threaded tube.
3. The inner spherical surface measuring device of a tee according to claim 1 or 2, characterized in that The vertical moving part includes: A fixed housing, the fixed housing is cylindrical; A moving housing slidably connected in the fixed housing. The moving housing is cylindrical. The end of the moving housing is fixedly connected to the measuring end. At least two groups of limit grooves (evenly distributed around the axis of the moving housing) are provided on the outer side of the moving housing. Limit blocks are provided in the fixed housing to cooperate with the limit grooves so that it can only move along its own axis; A worm gear threaded sleeve rotatably connected in the fixed housing. An external thread is provided on the outer side of the moving housing, and an internal thread is provided on the inner side of the worm gear threaded sleeve. The worm gear threaded sleeve is threadedly connected to the moving housing; A worm rotatably connected in the fixed housing. The worm meshes with the worm gear part on the outer side of the worm gear threaded sleeve; A moving motor fixedly connected to the fixed outer shell for driving the worm to rotate.
4. The spherical inner surface measuring device of the tee according to claim 3, wherein The vertical moving part further includes; A rotating part for driving the measuring end to rotate to measure the circular runout of the inner spherical surface.
5. The spherical inner surface measuring device of the tee according to claim 4, characterized in that, The rotating part includes: A rotating housing, the rotating housing is cylindrical with openings at both ends. The rotating housing is fixedly connected to the connecting seat; A first motor seat fixedly connected to the end of the rotating housing away from the connecting seat; A limit plate, the limit plate is rotatably connected to the first motor seat. The limit plate is fixedly connected to the moving housing; A rotating motor fixedly connected in the moving housing. The output shaft of the rotating motor is fixedly connected to the end of the first motor seat away from the rotating housing.
6. The spherical inner surface measuring device of the tee according to claim 1 or 2, characterized in that The workbench further includes: Clamping table, with the clamping part fixedly connected to the clamping table; Horizontal adjustment part and universal support, the horizontal adjustment part and the universal support are connected between the clamping tables, the universal support is arranged at the central position of the clamping table, and the horizontal adjustment part is used to adjust the inclination angle of the clamping table.
7. The ball seat inner spherical surface measuring device according to claim 6, characterized in that The universal support is a ball head structure, a support ball seat is fixedly connected to the clamping table, the universal support includes a support column fixedly connected to the horizontal table and a support ball head fixedly connected to the end of the support column, and the support ball seat is sleeved on the support ball head; The horizontal adjustment part is an electric telescopic structure, there are three groups of horizontal adjustment seats, and the three groups of horizontal adjustment seats are evenly distributed circumferentially around the axis of the universal support of the clamping table. The two ends of the horizontal adjustment part are respectively connected to the horizontal table surface and the clamping table through ball pin structures, and the inclination angle of the clamping table is adjusted by the telescopic movement of the horizontal adjustment part.
8. The spherical inner surface measuring device of the tee according to claim 7, wherein The horizontal adjustment part includes: Oblique support tube, the oblique support tube is a cylindrical shape with an opening at one end, the closed end of the oblique support tube is connected to the horizontal table surface through a ball pin structure, and an inner retaining ring is arranged at the opening of the oblique support tube; Axial electromagnet fixedly connected inside the oblique support tube, the axial electromagnet is located at the bottom of the oblique support tube; Movable support, one end of the movable support is located inside the oblique support tube, and the other end is connected to the clamping table through a ball pin structure. A permanent magnet is fixedly connected to the end of the movable support located inside the oblique support tube, and the axial electromagnet repels the permanent magnet after being energized; Compression spring located inside the oblique support tube, the compression spring is sleeved on the movable support, and both ends of the compression spring abut against the inner retaining ring and the end of the movable support.
9. The inner spherical surface measuring device of a tee according to claim 1 or 2, characterized in that The clamping part includes: Clamping seat, the clamping seat is disc-shaped, there are three groups of limiting sliding grooves evenly distributed circumferentially around the axis of the clamping seat on the clamping seat, and plugs are fixed at the ends of the limiting sliding grooves close to the outside; Clamping slider slidably connected in the limiting sliding groove, a clamping rod is arranged vertically on the clamping slider, and a tension spring is connected between the plug and the clamping slider; Clamping cover, there are three groups of limiting holes evenly distributed circumferentially around the axis of the clamping cover on the side of the clamping cover, the limiting holes are waist-shaped holes, a limiting screw is threadedly connected to the outside of the clamping seat, and the limiting screw is located in the limiting hole. There are also three groups of arc-shaped holes evenly distributed circumferentially around the axis of the clamping cover on the end face of the clamping cover, the arc-shaped holes are divergently arranged, the clamping rod is located in the arc-shaped holes, and when the clamping cover rotates, it drives the clamping slider to slide in the limiting sliding groove.
10. The spherical inner surface measuring device of the tee according to claim 9, characterized in that, The clamping rod is detachably connected to the clamping slider.