High efficiency inclined double shaft protractor plate

Abstract

The application relates to the technical field of index plates, in particular to a high-efficiency inclined double-shaft index plate which comprises a first rotating component and a moving unit. The first rotating component comprises a first index plate and a first camshaft, and a plurality of first rollers capable of sliding along preset motion tracks are uniformly distributed on the outer wall of the first index plate; a first cam with an arc surface is fixedly arranged on the first camshaft, the first cam forms a continuous curved groove, and the first rollers are embedded in the curved groove. The moving unit can drive the first rollers to slide along the preset motion tracks on the first index plate, so that the contact position of the first rollers and the cam with an arc surface when the first camshaft stops rotating is changed; when the working platform is at a specific angle for a long time, the meshing area of the first rollers and the first cam with an arc surface is prevented from being excessively worn due to long-term partial load, the wear degree is reduced, and the service life of the first index plate and the first camshaft is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of protractor, in particular to a high-efficiency inclined double-shaft protractor. BACKGROUND

[0002] The inclined double-shaft protractor is a high-precision numerical control equipment applied in the field of mechanical processing. The inclined double-shaft protractor is based on a base and is equipped with a double-rotation shaft mechanism composed of an inclined shaft and a rotating shaft. The power transmission is realized through a servo motor drive and a worm gear transmission system. In combination with a positioning detection device such as a grating ruler or an encoder and a workbench, the inclined double-shaft protractor can be fixed on a machine tool workbench and clamp a workpiece. The components are connected through mechanical assembly and signal connection to form a linkage system. After installation, adjustment, workpiece clamping and parameter setting, the inclined double-shaft protractor can realize rapid positioning and processing of multiple surfaces and multiple angles of a workpiece, and is widely used in high-precision processing of complex parts such as molds, aerospace and automobile parts. After processing, the equipment can be reset and cleaned. Many workpieces have inclined surfaces, inclined holes or complex spatial curved surfaces. In order to enable the tool to cut in a suitable posture, the workbench needs to be adjusted to a specific angle through the inclined shaft to ensure the processing precision and surface quality. However, when the inclined shaft is at a specific angle, the gravity of the workbench and the workpiece will cause the worm gear pair to bear continuous eccentric load, which will cause the friction and extrusion of the specific meshing area to be intensified, and the wear of this area will be much more serious than other angles, and the wear will become more and more serious with the extension of processing time. This will reduce the positioning accuracy of the protractor, cause the size deviation of the workpiece, the insufficient surface precision, and even scrap; at the same time, it will shorten the service life of the worm gear pair, increase the maintenance and replacement cost, reduce the production efficiency, and affect the stability of the equipment. SUMMARY

[0003] Therefore, it is necessary to provide a high-efficiency inclined double-shaft protractor to solve the problem of serious wear of the worm gear pair when the inclined shaft is at a specific angle.

[0004] The above-mentioned purpose is realized by the following technical scheme:

[0005] A high-efficiency inclined double-shaft protractor, comprising:

[0006] a base.

[0007] A first rotating assembly includes a first index plate and a first camshaft, both of which are rotationally connected to the base, and the axis of the first index plate is perpendicular to the axis of the first camshaft; the outer wall of the first index plate is uniformly distributed with a plurality of first rollers in the circumferential direction, and the plurality of first rollers can move on the first index plate; the outer wall surface of the first camshaft is fixedly provided with a first cam, which is arranged on the outer wall of the first camshaft along the axis of the first camshaft to form a continuous curved groove, and the plurality of first rollers are embedded in the curved groove; when the first camshaft rotates, the first cam can guide the first rollers to move along a preset motion trajectory, and the wall surface of the first cam can also push the first rollers to move around their own axes.

[0008] A moving unit is configured to drive the plurality of first rollers to move on the first index plate along the preset motion trajectory to change the contact position of the plurality of first rollers with the cam when the first camshaft stops rotating.

[0009] A driving assembly is configured to provide power for the rotation of the first camshaft and the moving unit.

[0010] Further, on the outer wall of the first index plate, the plurality of first rollers in the same axial direction include at least a first sub-roller and a second sub-roller, the first sub-roller is coaxially fixedly provided with a first gear near one end of the first index plate, and the second sub-roller is coaxially fixedly provided with a second gear near one end of the first index plate; after the first camshaft stops rotating, the moving unit drives the first sub-roller and the second sub-roller to move towards each other, so that the first gear meshes with the second gear.

[0011] Further, on the outer wall of the first index plate, the plurality of first rollers in the same circumferential direction include at least a first sub-roller and a third sub-roller abutting each other, the curved groove is divided into a plurality of grooves along the axial direction of the first camshaft, the first sub-roller and the third sub-roller are located in the same groove, the first sub-roller can abut against one side wall surface of the first cam, and the third sub-roller can abut against the other side wall surface of the first cam.

[0012] Further, the first sub-roller is coaxially fixedly provided with a first gear near one end of the first index plate, and the third sub-roller is coaxially fixedly provided with a third gear near one end of the first index plate, and the first gear meshes with the third gear.

[0013] Further, the mobile unit comprises a plurality of first sliding rails and a transmission structure, the first sliding rails are fixedly installed on the outer peripheral wall surface of the first index plate, the first sliding rails extend along the preset movement track, and one first roller is slidingly connected to one first sliding rail; the driving assembly drives the first roller to move on the first sliding rail through the transmission structure.

[0014] Further, the transmission structure comprises a plurality of first transmission ropes, the first roller is coaxially and rotationally provided with a first supporting block at one end close to the first index plate, the first supporting block is embedded in the first sliding rail, and one first transmission rope is fixedly connected to both ends of the first supporting block; the driving assembly can drive the first transmission rope to move so as to drive the first supporting block to move in the first sliding rail.

[0015] Further, the transmission structure further comprises a plurality of first transmission gears and a first large gear, the first transmission gears are rotationally and uniformly connected to the first index plate in the circumferential direction, one first transmission rope is wound around one first transmission gear, the first large gear is coaxially and rotationally connected to the first index plate, and the first large gear is engaged with the first transmission gears at the same time; the driving assembly can drive the first large gear to rotate.

[0016] Further, the transmission structure further comprises a plurality of supporting wheels, the supporting wheels are rotationally installed on the wall surface of the first index plate, and one first transmission rope is wound around the supporting wheels.

[0017] Further, the first rotating assembly further comprises a fixing rod, the fixing rod can penetrate through the first roller and is fixedly connected to the first supporting block, and the fixing rod is used for limiting the first roller from being separated from the first supporting block.

[0018] Further, the mobile unit further comprises a workbench and a second rotating assembly, the workbench is rotationally connected to the base, the second rotating assembly has the same structure as the first rotating assembly, the first rotating assembly is used for driving the workbench to rotate perpendicularly to the axis of the workbench, and the second rotating assembly is used for driving the workbench to rotate around the axis of the workbench.

[0019] The mobile unit has the following beneficial effects:

[0020] The application provides a high-efficiency inclined double-shaft index plate, which comprises a first rotating assembly and a moving unit.

[0021] The moving unit can drive the first rollers to slide on the first index plate, change the contact position of the first rollers with the cam surface when the first cam shaft stops rotating, thereby avoiding the situation that a single area of the cam surface and the first rollers bears the eccentric load for a long time when the workbench surface is at a specific angle, making the wear evenly distributed, reducing the local excessive wear, and prolonging the service life of the first index plate and the first cam shaft. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The structure schematic diagram of the high-efficiency inclined double-shaft index plate provided by an embodiment of the application is shown in the figure.

[0023] Figure 2 The sectional view of the high-efficiency inclined double-shaft index plate provided by an embodiment of the application is shown in the figure.

[0024] Figure 3 The sectional view of the high-efficiency inclined double-shaft index plate provided by an embodiment of the application is shown in the figure. Figure 2 The partial enlarged view of A in the figure.

[0025] Figure 4 The structure schematic diagram of the first rotating assembly and the moving unit in the high-efficiency inclined double-shaft index plate provided by an embodiment of the application is shown in the figure.

[0026] Figure 5 The sectional view of the first rotating assembly and the moving unit in the high-efficiency inclined double-shaft index plate provided by an embodiment of the application is shown in the figure. Figure 4 The partial enlarged view of B in the figure.

[0027] Figure 6 The sectional view of the first rotating assembly and the moving unit in the high-efficiency inclined double-shaft index plate provided by an embodiment of the application is shown in the figure. Figure 4 The partial enlarged view of C in the figure.

[0028] Figure 7 The sectional view of the first rotating assembly and the moving unit in the high-efficiency inclined double-shaft index plate provided by an embodiment of the application is shown in the figure.

[0029] Figure 8 The sectional view of the first rotating assembly and the moving unit in the high-efficiency inclined double-shaft index plate provided by an embodiment of the application is shown in the figure. Figure 4 The sectional view of the first rotating assembly and the moving unit in the high-efficiency inclined double-shaft index plate provided by an embodiment of the application is shown in the figure.

[0030] Figure 9 The sectional view of the first rotating assembly and the moving unit in the high-efficiency inclined double-shaft index plate provided by an embodiment of the application is shown in the figure.Figure 8 a sectional view along the direction of D-D;

[0031] Figure 10 For Figure 9 a local enlarged view at E.

[0032] Wherein:

[0033] 110, base; 120, workbench; 130, first box; 140, second box;

[0034] 210, first camshaft; 211, first cam; 220, first index plate; 221, first rotation shaft; 230, first roller; 231, first support block; 232, fixed rod; 240, first sub-wheel; 241, first gear; 250, second sub-wheel; 251, second gear; 260, third sub-wheel; 261, third gear;

[0035] 310, first slide rail; 320, first transmission rope; 321, support wheel; 330, first transmission gear; 340, first bull gear;

[0036] 420, second rotation motor. DETAILED DESCRIPTION

[0037] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0038] The serial numbers of components in the present application, such as “first”, “second”, etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The “connection” and “coupling” in the present application include direct and indirect connection (coupling) unless otherwise specified. In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise” and the like are based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0039] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature is "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in horizontal height than the second feature. The first feature is "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in horizontal height than the second feature.

[0040] Reference is made below Figures 1 to 10 The high-efficiency inclined double-shaft index plate provided by the embodiment of the present application is described.

[0041] The high-efficiency inclined double-shaft index plate provided by the embodiment of the present application includes a support assembly, a first rotating assembly, a second rotating assembly and a driving assembly.

[0042] The support assembly includes a base 110, a workbench 120, a first box 130 and a second box 140. The base 110 is fixedly placed on an external fixed support surface as a mounting basis for other components, and provides stable support for the overall structure. The workbench 120 is rotationally connected to the base 110, and is used to support workpieces and provide positioning reference for subsequent machining; the workbench 120 is provided with a clamping structure for clamping workpieces to be machined. The first box 130 is fixedly connected to the side wall surface of the base 110, and the workbench 120 can rotate on the first box 130 in a direction perpendicular to its own axis, and the first box 130 is used to provide a relatively isolated working environment for the first rotating assembly. The second box 140 is rotationally connected to the base 110, and the workbench 120 can rotate on the second box 140 about its own axis, and the second box 140 is used to provide a relatively isolated working environment for the second rotating assembly.

[0043] The first rotating assembly includes a first index plate 220 and a first camshaft 210. The first index plate 220 coaxially extends out a first rotating shaft 221, and is rotationally connected to the first box 130 through the first rotating shaft 221. The end of the first rotating shaft 221 away from the first index plate 220 is rotationally connected to the workbench 120, and the rotation of the first index plate 220 can directly drive the workbench 120 to move synchronously with the first rotating shaft 221 perpendicular to its own axis, thereby realizing the axial indexing of the workbench 120. The first camshaft 210 is rotationally connected to the first box 130, and the axis of the first camshaft 210 is arranged perpendicular to the axis of the first index plate 220.

[0044] The outer wall surface of the first index plate 220 is uniformly provided with a plurality of first rollers 230 in the circumferential direction, the axes of the plurality of first rollers 230 are all perpendicular to the axis of the first index plate 220, and the plurality of first rollers 230 are rotationally connected to the first index plate 220. The outer wall surface of the first camshaft 210 is fixedly provided with a first cam surface 211 along the axis, the first cam surface 211 forms a continuous curved groove on the first camshaft 210, and the plurality of first rollers 230 are embedded in the curved groove and meshed with the first cam surface 211. When the first camshaft 210 rotates, the first cam surface 211 can guide the first roller 230 to move along a preset motion trajectory to drive the first index plate 220 to rotate around its own axis, and the meshing of the first cam surface 211 and the first roller 230 drives the first roller 230 to rotate around its own axis.

[0045] The second rotating assembly is used to drive the workbench surface 120 to rotate around its own axis to realize the circumferential indexing of the workbench surface 120.

[0046] The driving assembly is used to provide power for the first rotating assembly and the second rotating assembly, and the driving assembly comprises a first rotating motor used to drive the first camshaft 210 in the first rotating assembly to rotate.

[0047] In use, the workpiece to be processed is placed on the workbench surface 120, and the workpiece is fixed by the clamping structure of the workbench surface 120 to prevent displacement of the workpiece during processing.

[0048] The driving assembly is started, the first rotating motor drives the first camshaft 210 to rotate, and the first cam surface 211 on the first camshaft 210 rotates synchronously. Since the plurality of first rollers 230 are embedded in the curved groove formed by the first cam surface 211, the rotation of the first cam surface 211 drives the first roller 230 to move along a preset motion trajectory, thereby driving the first index plate 220 to rotate around its own axis. The first rotating shaft 221 is rotationally connected to the workbench surface 120 at the end away from the first index plate 220, and the rotation of the first index plate 220 synchronously drives the workbench surface 120 to rotate, so that the workbench surface 120 can rotate on the first box body 130 perpendicular to its own axis, thereby adjusting the inclination angle of the workbench surface 120. At the same time, the driving assembly provides power for the second rotating assembly, the second rotating assembly drives the workbench surface 120 to rotate around its own axis, so that the workbench surface 120 can rotate circumferentially on the second box body 140 to complete the circumferential indexing of the workpiece. Under the cooperation of the first rotating assembly and the second rotating assembly, the workbench surface 120 drives the workpiece to be adjusted to the required inclination angle and circumferential position.

[0049] When the workpiece reaches the preset machining position, the driving assembly stops the power output to the first rotating assembly and the second rotating assembly, the meshing relationship between the first cam 211 and the first roller 230 and the second rotating assembly together ensure that the position of the workbench top 120 is fixed, and at this time, the workpiece can be machined. After the machining is completed, the driving assembly is started again, and the above-mentioned angle adjustment process is repeated to position the next machining position of the workpiece until all machining processes are completed. After the machining is completed, the driving assembly is turned off, the clamping structure on the workbench top 120 is loosened to clamp the workpiece, and the machined workpiece is removed.

[0050] However, when the workbench top 120 is at a certain angle, the gravity of the workbench top 120 and the workpiece will form a continuous eccentric load force, which is transmitted to the first cam shaft 210 and the first index plate 220 through the connection relationship. Since the first cam 211 of the first cam shaft 210 is in meshing state with the first roller 230 of the first index plate 220, the eccentric load force will act on the specific meshing area of the first cam 211 and the first roller 230, causing the friction and extrusion degree of the meshing area to be significantly aggravated, so that the wear speed of the meshing area at the specific angle is much higher than that of the meshing area at other angles, thereby causing uneven wear of the first cam 211 and the first roller 230 in the corresponding area.

[0051] Therefore, the high-efficiency inclined double-shaft index plate provided by the embodiment of the present application further comprises a moving unit, the moving unit being used for driving the plurality of first rollers 230 in the first rotating assembly to move on the first index plate 220 along a preset movement track, so as to realize wear dispersion by changing the contact position of the first roller 230 and the first cam 211.

[0052] Specifically, the moving unit comprises a first sliding rail 310 and a transmission structure.

[0053] The first sliding rail 310 is fixedly installed on the outer wall surface of the first index plate 220, and the first sliding rail 310 extends along the direction of the preset movement track of the first roller 230. The end of the first roller 230 close to the first index plate 220 is rotationally provided with a first supporting block 231, the first supporting block 231 is rotationally matched with the first roller 230, and the first supporting block 231 is embedded in the first sliding rail 310, and the first supporting block 231 and the first sliding rail 310 are used for enabling the first roller 230 to move on the first index plate 220.

[0054] The transmission structure comprises a plurality of first transmission ropes 320, a plurality of first transmission gears 330 and a first bull gear 340. Two ends of each first transmission rope 320 are fixedly connected to a first supporting block 231, and the first transmission rope 320 is arranged around the outer wall surface and the inner wall surface of the first index disc 220 to form a closed force transmission path. The plurality of first transmission gears 330 are uniformly distributed on the inner circumferential wall surface of the first index disc 220 in the circumferential direction of the first index disc 220, and the first transmission gears 330 are rotationally connected to the first index disc 220, and the axis of the first transmission gears 330 is parallel to the axis of the first index disc 220. The first transmission gears 330 are provided with a concave gear segment and a gear segment in the axial direction, and one first transmission rope 320 is arranged on the concave gear segment of one first transmission gear 330. The first bull gear 340 is coaxially rotationally connected to the first index disc 220, and the first bull gear 340 is simultaneously engaged with the gear segments of the plurality of first transmission gears 330.

[0055] The drive assembly further comprises a second rotation motor 420. The second rotation motor 420 is used to drive the first bull gear 340 to rotate.

[0056] In the normal use process, the second rotation motor 420 drives the first bull gear 340 to rotate synchronously with the first index disc 220. At this time, the first transmission gears 330 will rotate around their own axes due to the rotation of the first bull gear 340 because the first transmission gears 330 are engaged with the first bull gear 340, but the first index disc 220 will drive the first transmission gears 330 to revolve around the axis of the first index disc 220 because the first transmission gears 330 are rotationally connected to the first index disc 220, so that there is no relative sliding along the meshing surface between the first bull gear 340 and the first transmission gears 330, that is, the first bull gear 340 and the first transmission gears 330 will not produce relative rotation. When the first bull gear 340 and the first transmission gears 330 do not rotate relative to each other, the first transmission gears 330 cannot generate pulling force or pushing force on the first transmission ropes 320, and the first transmission ropes 320 remain in a stationary state on the first transmission gears 330, thereby making the first rollers 230 unable to move in the axial direction on the first index disc 220, and finally realizing the relative position fixation of the first rollers 230 and the first index disc 220.

[0057] When the contact position of the first roller 230 and the first cam 211 needs to be changed, the second rotating motor 420 drives the first gear wheel 340 to rotate relatively on the first index plate 220. At this time, the rotating speed of the first gear wheel 340 and the rotating speed of the first index plate 220 form a difference. Since the first transmission gear 330 is in engagement with the first gear wheel 340, and the first transmission gear 330 is rotationally connected to the first index plate 220, the relative rotation of the first gear wheel 340 will force the first transmission gear 330 to additionally rotate around its own axis while revolving around the axis of the first index plate 220. This rotation causes the relative sliding along the engagement surface between the first gear wheel 340 and the first transmission gear 330, i.e., the relative rotation of the first gear wheel 340 and the first transmission gear 330. When the first gear wheel 340 and the first transmission gear 330 rotate relatively, the rotation of the first transmission gear 330 will exert a pulling force or a pushing force on the first transmission rope 320 wound thereon. The first transmission rope 320 will displace along the outer circumferential surface of the first transmission gear 330 under the action of the force. Since the two ends of the first transmission rope 320 are fixedly connected to the first support block 231 of the first roller 230, the displacement of the first transmission rope 320 will drive the first support block 231 to move on the first sliding rail 310 of the first index plate 220, thereby changing the relative position of the first roller 230 on the first index plate 220, and achieving the change of the contact position of the first roller 230 and the first cam 211 when the workbench top 120 is at a specific angle.

[0058] Thus, by driving the first roller 230 to move on the first index plate 220 through the moving unit, the contact position of the first roller 230 and the first cam 211 is changed, the frictional extrusion generated by the eccentric load is dispersed to multiple regions of the first cam 211, the wear distribution on the first cam 211 is uniform, the wear rate of a specific region of the first cam 211 is significantly reduced, the service life of the first rotating assembly is prolonged, and the positioning accuracy stability of the first index plate 220 at each angle is ensured.

[0059] It can be understood that after the first camshaft 210 stops rotating, the first large gear 340 exerts a force on the first roller 230 in the direction of the preset motion trajectory, causing the first roller 230 to slide along the first slide rail 310 in the axial direction of the first index plate 220. Since the first cam 211 has stopped, the curved groove only serves as a guide and support for the first roller 230 and does not generate a circumferential force on the first index plate 220 due to the movement of the first roller 230 in the direction of the preset motion trajectory. Therefore, the timing of the movement unit driving the first roller 230 to move on the first index plate 220 can be varied. For example, the movement unit can drive the first roller 230 to move on the first index plate 220 before the workbench surface 120 adjusts the angle, to adjust the contact position of the first roller 230 with the first cam 211; or the movement unit can drive the first roller 230 to move on the first index plate 220 after the workbench surface 120 completes the angle adjustment, to adjust the contact position of the first roller 230 with the first cam 211. However, the timing of the movement unit driving the first roller 230 to move on the first index plate 220 should ensure that the engagement state of the first roller 230 with the first cam 211 remains stable, does not affect the normal transmission of the first rotating assembly, and can complete the switching of the contact position when the workbench surface 120 is at a specific angle, to ensure uniform wear distribution.

[0060] It can be understood that the first rotating motor and the second rotating motor 420 can both be servo motors, which have precise speed control, position control, and torque output capabilities, and can meet the driving requirements.

[0061] The servo motor can output different pulse signals through the control system to achieve precise speed regulation and thus output different rotating powers. The servo motor also includes a drive module that receives the pulse signals from the control system. The frequency of the pulse signals directly determines the target speed of the motor. The higher the frequency, the faster the target speed of the motor; the lower the frequency, the slower the target speed.

[0062] When the control system needs the servo motor to output more power, the control system increases the pulse signal frequency to set a higher target speed, and at this time the drive module increases the current supplied to the motor winding. The increase in current causes a stronger electromagnetic driving torque to be generated inside the motor to overcome the load resistance and accelerate to the target speed. Conversely, when the output power needs to be reduced, the control system reduces the pulse signal frequency, the drive module reduces the supply current, the electromagnetic torque generated by the motor decreases, the speed decreases, and the output power correspondingly decreases.

[0063] When the first gear wheel 340 needs to rotate synchronously with the first index plate 220, the control system sends matching pulse signals to the first rotation motor and the second rotation motor 420, so that the rotation angular velocity and direction of the first gear wheel 340 are completely consistent with those of the first index plate 220. At this time, the first rotation motor and the second rotation motor 420 output corresponding power that can maintain synchronous rotation; when the first gear wheel 340 needs to rotate relatively with the first index plate 220, the control system adjusts the pulse signals sent to the second rotation motor 420, so that the rotation speed of the second rotation motor 420 is different from that of the first rotation motor driving the first index plate 220 to rotate. The second rotation motor 420 outputs corresponding power that can drive the first gear wheel 340 to rotate relatively with the first index plate 220, thereby realizing the rotation of the first gear wheel 340 relative to the first index plate 220. The control system of the servo motor can accurately control the operating state of the first rotation motor and the second rotation motor 420, and ensure that the first index plate 220 and the first gear wheel 340 realize synchronous rotation or relative rotation.

[0064] It can be understood that the second rotation motor 420 is directly associated with the first gear wheel 340, and the rotation angle, rotation direction and output torque and other parameters output by the second rotation motor 420 can directly reflect the movement state of the first roller 230.

[0065] When the second rotation motor 420 drives the first gear wheel 340 to rotate relative to the first index plate 220, the meshing relationship between the first gear wheel 340 and the first transmission gear 330 will be converted into the displacement of the first transmission rope 320, thereby driving the first roller 230 to move along the axial direction of the first index plate 220. The rotation angle of the second rotation motor 420 driving the first gear wheel 340 relative to the first index plate 220 has a fixed proportional relationship with the movement distance of the first roller 230. The second rotation motor 420 drives the first gear wheel 340 to rotate a specific angle relative to the first index plate 220, and the rotation angle of the first transmission gear 330 can be accurately calculated through the transmission ratio of the first transmission rope 320 to obtain the movement amount of the first roller 230. Therefore, by monitoring the rotation angle, rotation direction and output torque change of the second rotation motor 420 in real time, the relative position relationship between the first roller 230 and the first cam 211 can be accurately judged and calculated.

[0066] Particularly, when the first camshaft 210 rotates, the first cam 211 generates a pushing force on the first roller 230 on the first index plate 220, and drives the first index plate 220 to rotate to realize angle adjustment. In this process, the side wall of the first cam 211 is in an inclined structure, and the pushing force on the first roller 230 has a radial component, which is deviated from the rotation axis of the first index plate 220, thereby forming an additional torque deviated from the rotation axis of the first index plate 220. The torque deviated from the axis will force the first index plate 220 to have a slight deflection tendency in a direction other than the rotation axis, but since the first index plate 220 is rigidly constrained by the first rotation shaft 221, the deflection cannot be realized, and thus the torque is converted into additional friction between the first index plate 220 and the first rotation shaft 221. The additional friction is superimposed on the basic frictional resistance when the first index plate 220 rotates, and finally causes the rotation resistance of the first index plate 220 during angle adjustment to increase significantly, affecting the smoothness and driving efficiency of the adjustment.

[0067] The movement of the mobile unit changes the position of the first roller 230 on the first index plate 220, and thus changes the contact point of the first roller 230 and the first cam 211. When the contact position of the first roller 230 and the first cam 211 changes, the pushing force direction of the first cam 211 on the first roller 230 is adjusted, so that the radial component of the pushing force of the first cam 211 on the first roller 230 is closer to the rotation axis of the first index plate 220, thereby reducing the additional torque deviated from the axis of the first index plate 220. Thus, by changing the contact position of the first roller 230 and the first cam 211, the radial component distribution of the pushing force is optimized, and the rotation resistance of the first index plate 220 during angle adjustment is reduced.

[0068] Further, the high-efficiency inclined double-shaft index plate provided by the embodiment of the present application further comprises a pressure sensor, an angle sensor and a control system.

[0069] The pressure sensor is fixedly installed on the first camshaft 210, and is used to detect the machining load of the first camshaft 210 in real time during rotation. The machining load includes static load and dynamic load. The static load is the load generated by the gravity of the worktable surface 120 and the workpiece, and the dynamic load is the impact force and vibration load generated during machining. The angle sensor is fixedly arranged on the first rotation shaft 221, and is used to detect the inclination angle of the worktable surface 120, i.e., the rotation angle of the first index plate 220 in real time.

[0070] The control system is in signal connection with the pressure sensor, the angle sensor and the moving unit, and can receive the processing load data transmitted by the pressure sensor and the angle data transmitted by the angle sensor. During use, the control system acquires and records the processing load of the first camshaft 210 and the corresponding processing duration of the workbench top 120 at different inclination angles in real time through synchronous detection of the pressure sensor and the angle sensor. All detection data are uploaded to the control system and stored to form complete historical working data.

[0071] Based on the historical working data, the control system establishes a relationship curve between the inclination angle of the workbench top 120 and the wear degree of the meshing area of the first roller 230 and the first cam 211 according to the rule that the greater the processing load and the longer the processing duration, the greater the wear degree. Through the relationship curve, the control system can clearly identify the angle that is most likely to cause serious wear of the meshing area among all the inclination angles of the workbench top 120, and sort all the angles according to the wear severity. According to the sorting result, the control system controls the frequency of the moving unit driving the first roller 230 to move on the first index plate 220: for the angle with the most serious wear degree, the control system controls the moving unit to adjust the position of the first roller 230 at the shortest time interval, i.e., the highest adjustment frequency; for the angle with lighter wear degree, the adjustment time interval is the longest, i.e., the lowest adjustment frequency. Wherein, the adjustment amplitude of the moving unit driving the first roller 230 to move on the first index plate 220 is fixed each time the position of the first roller 230 is adjusted, so as to ensure the stability and predictability of the adjustment. In this way, the wear of the meshing area of the first roller 230 and the first cam 211 at all angles is kept uniform, which significantly prolongs the service life of the first camshaft 210 and the first index plate 220, and at the same time ensures the long-term stability of the positioning accuracy of the workbench top 120.

[0072] Further, the transmission structure further comprises a support wheel 321. The support wheel 321 is a cylindrical wheel body, and the axis of the support wheel 321 is perpendicular to the axis of the first index plate 220. A plurality of support wheels 321 are uniformly distributed and rotatably installed on the outer peripheral wall surface of the first index plate 220, and the support wheel 321 is rotatably connected with the first index plate 220 to ensure that the support wheel 321 can rotate around its own axis. A first transmission rope 320 is wound around the plurality of support wheels 321, and the support wheel 321 supports the first transmission rope 320 to keep the first transmission rope 320 at a predetermined distance from the wall surface of the first index plate 220, avoiding direct contact between the first transmission rope 320 and the outer peripheral wall surface of the first index plate 220. During use, when the first transmission rope 320 moves under the driving of the first transmission gear 330, the first transmission rope 320 wound around the support wheel 321 will drive the support wheel 321 to rotate synchronously, thereby avoiding direct friction between the first transmission rope 320 and the outer peripheral wall surface of the first index plate 220.

[0073] Further, the first rotating assembly further comprises a fixing rod 232, which is used to prevent the first roller 230 from being separated from the first supporting block 231. The fixing rod 232 is a rod-shaped structure with external threads. The first supporting block 231 is provided with internal threads matched with the external threads of the fixing rod 232. The fixing rod 232 is fixedly connected with the first supporting block 231 through threads and is coaxially arranged with the first roller 230. The fixing rod 232 penetrates through the first roller 230 and is screwed into the first supporting block 231 to form a stable threaded connection with the first supporting block 231. In this way, the fixing rod 232 ensures that the first roller 230 is always connected with the first supporting block 231, avoids the transmission failure of the first rotating assembly caused by the separation of the first roller 230, and guarantees the continuity and stability of the meshing transmission between the first index plate 220 and the first cam shaft 210.

[0074] In one of the embodiments, after the first cam shaft 210 stops rotating, the first index plate 220 and the first cam shaft 210 only rely on the friction force between the first arc cam 211 and the first roller 230 to keep relatively static, which is easy to cause a slight relative displacement due to the gravity biasing of the workbench top 120 and the workpiece or machining vibration, resulting in a decrease in positioning accuracy.

[0075] Based on this, in order to lock the first index plate 220 and the first cam shaft 210 after the first cam shaft 210 stops rotating, at least the first sub-roller 240 and the second sub-roller 250 are included in the plurality of first rollers 230 arranged on the outer wall of the first index plate 220 along the same axial direction, and the first sub-roller 240 and the second sub-roller 250 can both move along a preset movement track on the first index plate 220. The first sub-roller 240 is coaxially fixedly provided with a first gear 241 at one end close to the first index plate 220, the second sub-roller 250 is coaxially fixedly provided with a second gear 251 at one end close to the first index plate 220, and the first gear 241 and the second gear 251 can be meshed with each other.

[0076] In the use process, when the first cam shaft 210 completes rotation and stops under the drive of the first rotating motor, the moving unit drives the first sub-roller 240 and the second sub-roller 250 to move on the first index plate 220 and move close to each other until the first gear 241 and the second gear 251 are completely meshed. At this time, the first gear 241 and the second gear 251 form a rigid connection to limit the relative rotation of the first sub-roller 240 and the second sub-roller 250.

[0077] When the first gear 241 meshes with the second gear 251, if the first cam 211 makes the first sub-wheel 240 and the second sub-wheel 250 have a positive rotation trend due to the gravity bias of the workbench top 120 and the workpiece or machining vibration, the first gear 241 will rotate positively with the first sub-wheel 240, driving the second gear 251 to rotate reversely, but the second gear 251 cannot rotate reversely due to the limitation of the same direction rotation trend of the second sub-wheel 250; conversely, if the second gear 251 wants to rotate positively with the second sub-wheel 250, it will also be prevented by the same direction rotation trend of the first gear 241.

[0078] Thus, by moving the moving unit to drive the first sub-wheel 240 and the second sub-wheel 250 to approach each other, the first gear 241 meshes with the second gear 251, fixing the relative position of the first index plate 220 and the first cam shaft 210, realizing the locking of the first index plate 220 and the first cam shaft 210, improving the relative position stability of the first index plate 220 and the first cam shaft 210 in the stopped state, and ensuring the positioning accuracy of the workbench top 120 at a specific angle not to be disturbed by external force.

[0079] In one embodiment, a small gap must be kept between the single first roller 230 and the side wall of the first cam 211 to avoid the first roller 230 simultaneously sticking to the two side walls of the first cam 211, causing the first index plate 220 to rotate and jam. When the first cam shaft 210 rotates positively, the first cam 211 pushes the first roller 230 to move, at which time the first roller 230 sticks to the first cam 211; but when the first cam shaft 210 rotates reversely, the side wall of the first cam 211 that contacts the first roller 230 is separated from the first roller 230, and the gap between the first roller 230 and the other side wall of the first cam 211 is eliminated by the rotation of the first cam shaft 210. This gap elimination process will cause a time difference, resulting in the first index plate 220 failing to respond immediately to the reverse rotation of the first cam shaft 210, causing transmission lag.

[0080] Based on this, on the outer wall of the first index plate 220, a plurality of first rollers 230 distributed along the same circumference include at least the first sub-wheel 240 and the third sub-wheel 260. The first sub-wheel 240 and the third sub-wheel 260 are in mutual abutment along the circumference of the first index plate 220, and the abutment surface always maintains close contact. The curved groove is divided into a plurality of independent grooves along the axial direction of the first cam shaft 210, the first sub-wheel 240 and the third sub-wheel 260 are always located in the same groove, and the positions of the first sub-wheel 240 and the third sub-wheel 260 in the groove are symmetrically distributed. The first sub-wheel 240 can abut against one side wall of the first cam 211, and the third sub-wheel 260 can abut against the other side wall of the first cam 211.

[0081] In use, when the first camshaft 210 rotates, the two side walls of the first cam 211 push the first sub-wheel 240 and the third sub-wheel 260 to move synchronously. The first sub-wheel 240 always keeps in contact with one side wall of the first cam 211, and the third sub-wheel 260 always keeps in contact with the other side wall of the first cam 211. The first sub-wheel 240 and the third sub-wheel 260 transmit the rotating motion of the first camshaft 210 to the first index plate 220 through the rolling friction. When the first camshaft 210 reverses rotation, the side walls of the first cam 211 push the first sub-wheel 240 and the third sub-wheel 260 reversely. Since the first sub-wheel 240 and the third sub-wheel 260 keep in contact with the two side walls of the first cam 211 without clearance, the reverse driving force of the first cam 211 can be transmitted to the first index plate 220 instantaneously.

[0082] Thus, by the contact of the first sub-wheel 240 with one side wall of the first cam 211 and the contact of the third sub-wheel 260 with the other side wall of the first cam 211, the transmission clearance between the first camshaft 210 and the first index plate 220 is eliminated. Meanwhile, the contact of the first sub-wheel 240 with one side wall of the first cam 211 and the contact of the third sub-wheel 260 with the other side wall of the first cam 211 disperse the transmission load of the first camshaft 210 to the two contact points between the first cam 211 and the first sub-wheel 240 and the third sub-wheel 260, so that the load borne by the first sub-wheel 240 and the third sub-wheel 260 is reduced, further reducing the energy loss in the rolling process.

[0083] Further, the first sub-wheel 240 is coaxially fixed with the first gear 241 at one end close to the first index plate 220, and the third sub-wheel 260 is coaxially fixed with the third gear 261 at one end close to the first index plate 220, and the first gear 241 and the third gear 261 always mesh. In use, when the first cam 211 pushes the first sub-wheel 240 and the third sub-wheel 260 to rotate around their own axes, the first gear 241 rotates synchronously with the first sub-wheel 240, and the third gear 261 rotates synchronously with the third sub-wheel 260. The first gear 241 and the third gear 261 make the first sub-wheel 240 and the third sub-wheel 260 rotate synchronously, completely eliminating the relative sliding or misaligned rotation that may occur between the first sub-wheel 240 and the third sub-wheel 260, thereby reducing the rotating resistance of the first sub-wheel 240 and the third sub-wheel 260 and reducing the energy loss in the power transmission process.

[0084] In one embodiment, the second rotating assembly has the same structure as the first rotating assembly.

[0085] The second rotating assembly comprises a second index plate and a second camshaft. The second index plate is coaxially fixed to extend out of a second rotating shaft. The second index plate is rotationally connected to the second box 140 through the second rotating shaft. An end of the second rotating shaft away from the second index plate is rotationally connected to the workbench top 120. Rotation of the second index plate can directly drive the workbench top 120 to move synchronously around the axis of the second rotating shaft, so as to realize the circumferential indexing of the workbench top 120. The second camshaft is rotationally connected to the second box 140. The axis of the second camshaft is perpendicular to the axis of the second index plate. The outer wall surface of the second index plate is uniformly provided with a plurality of second rollers in the circumferential direction. The axes of the plurality of second rollers are perpendicular to the axis of the second index plate. The plurality of second rollers are rotationally connected to the second index plate. The outer wall surface of the second camshaft is fixedly provided with a second cam along the axis. The second cam forms a continuous second curved groove on the second camshaft. The plurality of second rollers are embedded in the second curved groove and meshed with the second cam. When the second camshaft rotates, the second cam can guide the second rollers to move along the preset motion trajectory, so as to drive the second index plate to rotate around its axis. Meanwhile, the meshing of the second cam and the second rollers can drive the second rollers to rotate around their axes.

[0086] The moving unit comprises a plurality of second sliding rails and a second transmission structure. The second sliding rails are fixedly connected to the outer wall of the second index plate and extend along the preset motion trajectory of the second rollers. An end of the second roller close to the second index plate is rotationally provided with a second support block. The second support block is embedded in the second sliding rail, so that the second roller can slide on the second index plate along the preset motion trajectory. The second transmission structure comprises a plurality of second transmission ropes, a plurality of second transmission gears and a second large gear. The second transmission ropes are fixedly connected to both ends of the second support block and are wound around the outer and inner wall surfaces of the second index plate. The second transmission gears are uniformly distributed on the inner wall surface of the second index plate in the circumferential direction of the second index plate and are rotationally connected to the second index plate. One second transmission rope is wound around one second transmission gear. The second large gear is coaxially rotationally connected to the second index plate and is simultaneously meshed with the plurality of second transmission gears.

[0087] The driving assembly further comprises a third rotating motor and a fourth rotating motor. The third rotating motor is used to drive the second camshaft to rotate. The fourth rotating motor is used to drive the second large gear to rotate.

[0088] The structure of the second rotating assembly is consistent with that of the first rotating assembly, so as to ensure that the circumferential indexing movement of the workbench top 120 has the same high precision, high stability and low wear characteristics as the inclination angle adjustment, and realizes the same performance of the double-axis movement.

[0089] Any combination of the technical features in the above embodiments can be made, and for the sake of brevity, not all possible combinations are described above. However, any combination of the technical features is deemed to be within the scope of the present disclosure as long as such a combination does not result in an inconsistency.

[0090] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but should not be understood as a limitation on the scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A high-efficiency inclined double-axis protractor, characterized by, The utility model relates to a kind of first rotating assembly, including: Base; First rotating assembly, the first rotating assembly includes first index plate and first camshaft, the first index plate and the first camshaft are rotationally connected to the base, the axis of the first index plate is vertically arranged with the axis of the first camshaft;Multiple first rollers are uniformly distributed on the outer wall of the first index plate along the circumference, and multiple first rollers can move on the first index plate;First cam surface cam is fixedly arranged on the outer wall surface of the first camshaft, and the first cam surface cam is arranged on the outer wall of the first camshaft along the axis of the first camshaft, to form continuous curved surface groove, and multiple first rollers are embedded in the curved surface groove, when the first camshaft rotates, the first cam surface cam can guide first roller to move along preset motion trajectory, and the wall surface of the first cam surface cam can also push first roller to move around its axis; Moving unit, the moving unit is used to drive multiple first rollers to move on the first index plate along the preset motion trajectory, to change the contact position of multiple first rollers with the cam surface cam when the first camshaft stops rotating; Driving assembly, the driving assembly is used to provide power for the rotation of the first camshaft and the moving unit.

2. The high-efficiency tilt bi-axial index plate of claim 1, wherein, On the outer wall of the first index plate, multiple first rollers in the same axial direction at least include first sub-wheel and second sub-wheel, the first sub-wheel is fixedly arranged with first gear coaxially near one end of the first index plate, the second sub-wheel is fixedly arranged with second gear coaxially near one end of the first index plate, after the first camshaft stops rotating, the moving unit drives the first sub-wheel and the second sub-wheel to approach each other, so that the first gear is engaged with the second gear.

3. The high-efficiency tilt double-axial index plate of claim 1, wherein, On the outer wall of the first index plate, multiple first rollers in the same circumferential direction at least include first sub-wheel and third sub-wheel abutting each other, the curved surface groove is divided into multiple grooves along the axial direction of the first camshaft, the first sub-wheel and the third sub-wheel are located in the same groove, the first sub-wheel can abut against one side wall surface of the first cam surface cam, and the third sub-wheel can abut against the other side wall surface of the first cam surface cam.

4. The high-efficiency tilt bi-axial index plate of claim 3, wherein, The first sub-wheel is fixedly arranged with first gear coaxially near one end of the first index plate, and the third sub-wheel is fixedly arranged with third gear coaxially near one end of the first index plate, and the first gear is engaged with the third gear.

5. The high-efficiency tilt double-axial index plate of claim 1, wherein, The moving unit includes multiple first sliding rails and transmission structure, multiple first sliding rails are fixedly installed on the outer circumferential wall surface of the first index plate, the first sliding rail extends along the preset motion trajectory, and one first roller is slidingly connected to one first sliding rail;The driving assembly drives the first roller to move on the first sliding rail through the transmission structure.

6. The high-efficiency tilt bi-axial index plate of claim 5, wherein, The transmission structure comprises a plurality of first transmission ropes, the first roller is coaxially arranged with a first supporting block near one end of the first index plate, the first supporting block is embedded in the first slide rail, one end of the first transmission rope is fixedly connected to both ends of the first supporting block, and the driving assembly can drive the first transmission rope to move to drive the first supporting block to move in the first slide rail.

7. The high-efficiency tilt bi-axial index plate of claim 6, wherein, The transmission structure further comprises a plurality of first transmission gears and a first large gear, a plurality of the first transmission gears are uniformly rotationally connected to the first index plate in the circumferential direction, one of the first transmission gears is wound with one of the first transmission ropes, the first large gear is coaxially rotationally connected to the first index plate, and the first large gear is simultaneously engaged with a plurality of the first transmission gears; the driving assembly can drive the first large gear to rotate.

8. The high-efficiency tilt bi-axial index plate of claim 6, wherein, The transmission structure further comprises a plurality of supporting wheels, a plurality of the supporting wheels are rotationally installed on the wall surface of the first index plate, and one of the first transmission ropes is wound on a plurality of the supporting wheels.

9. The high-efficiency tilt bi-axial index plate of claim 6, wherein, The first rotating assembly further comprises a fixing rod, the fixing rod can penetrate through the first roller, is fixedly connected to the first supporting block, and is used for limiting the first roller from being separated from the first supporting block.

10. The high-efficiency tilt bi-axial index plate of claim 1, wherein, Further comprising a workbench and a second rotating assembly, the workbench is rotationally connected to the base, the first rotating assembly is used for driving the workbench to rotate perpendicularly to the axis of the workbench, and the second rotating assembly is used for driving the workbench to rotate around the axis of the workbench.

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