Planetary gear internal and external tooth angular error measuring device

Abstract

The application provides a planetary gear inner and outer tooth angular error measuring device, and relates to the technical field of detection. The device comprises a positioning mechanism and a measuring mechanism. The positioning mechanism comprises a positioning table and multiple positioning pins. The multiple positioning pins are connected with the positioning table. At least one of the multiple positioning pins is a floating pin. The floating pin is slidably connected with the positioning table. Each positioning pin is used for engaging with an inner tooth groove of a planetary gear. The measuring mechanism is connected with the positioning mechanism and is used for acquiring inner and outer tooth angular errors of a to-be-detected planetary gear. The measuring device can consider both measuring efficiency and measuring precision, has low operation cost and high reliability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of detection, in particular to a planetary gear inner and outer tooth angular error measuring device. BACKGROUND

[0002] In order to ensure the transmission accuracy of the precision speed reducer, the inner and outer tooth angular error of the planetary gear needs to be strictly controlled. The existing planetary gear angular error measuring device adopts the spline shaft and planetary gear spline hole cooperation mode to measure the inner and outer tooth angular error. However, the planetary gear spline hole is not usually subjected to finish machining after heat treatment, and the tooth thickness error is large. The spline core rod is used to measure the same batch of planetary gears, and the spline shaft and spline hole are inserted and cooperated to realize positioning and calibration, and then the angular error is measured by using the measuring head sensor.

[0003] The inventor found that the existing planetary gear inner and outer tooth angular error measuring device has the following shortcomings:

[0004] Efficiency and measurement accuracy cannot be considered at the same time. SUMMARY

[0005] The purpose of the present application is to provide a planetary gear inner and outer tooth angular error measuring device which can simultaneously consider measurement efficiency and measurement accuracy.

[0006] The embodiment of the present application is implemented as follows:

[0007] The present application provides a planetary gear inner and outer tooth angular error measuring device, comprising:

[0008] A positioning mechanism and a measuring mechanism, the positioning mechanism comprises a positioning table and a plurality of positioning pins, the plurality of positioning pins are connected with the positioning table, and at least one of the plurality of positioning pins is provided as a floating pin, the floating pin is slidably connected with the positioning table, and each positioning pin is used for engaging with the inner tooth groove of the planetary gear; the measuring mechanism is connected with the positioning mechanism, and is used for acquiring the inner and outer tooth angular error of the measured planetary gear.

[0009] In an optional embodiment, the floating pin is connected with the positioning table through a first elastic member, and the first elastic member is used to make the floating pin have an outward movement trend.

[0010] In an optional embodiment, the positioning mechanism further comprises a locking member, the locking member has a locking position and an unlocking position which are switched with each other, when being in the locking position, the locking member is inserted into a locking area surrounded by the plurality of positioning pins, and the locking member is in elastic contact with the floating pin and can overcome the elastic force of the first elastic member and make the floating pin have an inward movement trend; when being in the unlocking position, the locking member is away from the locking area.

[0011] In an optional embodiment, the locking member comprises a main body and a second elastic member connected with the main body; when in the locking position, the main body and the second elastic member are inserted into the locking area, and the second elastic member can abut against the floating pin to make the floating pin have a tendency of moving from inside to outside.

[0012] In an optional embodiment, the floating pin is provided with a positioning groove, and the second elastic member can be clamped into the positioning groove when in the locking position.

[0013] In an optional embodiment, each positioning pin is provided with a first guide inclined surface away from one side of the positioning table, or the locking member is provided with a second guide inclined surface, the first guide inclined surface is used to abut against the locking member to make the floating pin have a tendency of moving from inside to outside, and the second guide inclined surface is used to abut against the plurality of positioning pins to make the floating pin have a tendency of moving from inside to outside.

[0014] In an optional embodiment, the positioning table is provided with a fixing hole, the floating pin is slidably connected with the fixing hole, and the floating pin and the fixing hole are relatively fixed in the circumferential direction of the floating pin.

[0015] In an optional embodiment, the measuring mechanism comprises a mounting seat, a measuring block, a guide block and a probe sensor, the mounting seat is fixedly connected with the positioning table, the measuring block is slidably connected with the mounting seat in a first direction and the two are clearance fit, the guide block is slidably connected with the positioning table in a second direction and the two are relatively fixed in the first direction, the measuring block is slidably connected with the guide block in the first direction and the two are relatively fixed in the second direction, so that the measuring block can drive the guide block to slide relative to the positioning table in the second direction, and the probe sensor is connected with the mounting seat to obtain the position of the measuring block.

[0016] In an optional embodiment, the positioning table is provided with a first guide groove, the guide block is slidably connected with the first guide groove in the second direction, and the guide block is provided with a second guide groove, the measuring block is slidably connected with the second guide groove in the first direction.

[0017] In an optional embodiment, the measuring mechanism further comprises an adjusting screw, an adjusting nut and a third elastic member, the adjusting screw is slidably connected with the mounting seat in a first direction, one end of the adjusting screw is connected with the measuring block, the adjusting nut is screwed with the adjusting screw and located on the side of the mounting seat away from the measuring block, and the third elastic member abuts against the mounting seat and the measuring block to make the measuring block have a tendency of moving close to the planetary gear.

[0018] The beneficial effects of the embodiment of the present application are:

[0019] In summary, the planetary gear inner and outer tooth angular error measuring device provided by the embodiment can reduce the size of the area surrounded by the plurality of positioning pins by moving the floating pin from outside to inside when positioning the planetary gear, so as to facilitate the simultaneous insertion of the plurality of positioning pins into the spline holes of the planetary gear to complete the rough positioning. After the plurality of positioning pins are inserted into the spline holes of the planetary gear, the position of the floating pin is adjusted to engage with the corresponding inner tooth groove of the planetary gear, so that the plurality of positioning pins cooperate to fix the planetary gear on the positioning table to achieve precise positioning of the planetary gear. Since the position of the floating pin can be adjusted as needed, the plurality of positioning pins will not be in interference fit with the spline holes of the planetary gear before positioning, reducing the positioning difficulty and improving the positioning efficiency, thereby improving the measuring efficiency. At the same time, after positioning is completed, the floating pin can be closely engaged with the corresponding inner tooth groove by adjusting the position of the floating pin, avoiding the gap fit condition, and the measurement error caused by the gap fit is not easy to occur, so that the measurement accuracy is high and the measurement result is accurate. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0021] Figure 1 is a structural schematic diagram of a standard planetary gear or a planetary gear to be measured;

[0022] Figure 2 is an application schematic diagram of the planetary gear inner and outer tooth angular error measuring device of the embodiment of the present application;

[0023] Figure 3 is a structural schematic diagram of the planetary gear inner and outer tooth angular error measuring device of the embodiment of the present application;

[0024] Figure 4 is an exploded structural schematic diagram of the planetary gear inner and outer tooth angular error measuring device of the embodiment of the present application;

[0025] Figure 5 is a planar structural schematic diagram of the planetary gear inner and outer tooth angular error measuring device of the embodiment of the present application;

[0026] Figure 6The sectional structure schematic view of the planetary gear inner and outer tooth angular error measuring device of the embodiment of the present application is shown in the figure.

[0027] Figure 7 The structure schematic view of the positioning table of the embodiment of the present application is shown in the figure.

[0028] Figure 8 The structure schematic view of the fixed pin of the embodiment of the present application is shown in the figure.

[0029] Figure 9 The structure schematic view of the floating pin of the embodiment of the present application is shown in the figure.

[0030] Icon:

[0031] 001 - the planetary gear to be measured; 011 - the phase tooth groove; 012 - the relative tooth groove; 013 - the measuring tooth groove; 002 - the first direction; 003 - the second direction; 100 - the positioning mechanism; 110 - the positioning table; 111 - the first fixed hole; 112 - the second fixed hole; 113 - the first assembly hole; 114 - the first guide groove; 115 - the first anti-rotation plane; 116 - the step; 120 - the fixed pin; 121 - the first pin body; 122 - the first limiting block; 123 - the second anti-rotation plane; 124 - the first positioning groove; 125 - the first guide inclined surface; 130 - the floating pin; 131 - the second pin body; 132 - the second limiting block; 133 - the third limiting block; 134 - the abutting plane; 135 - the second positioning groove; 136 - the second guide inclined surface; 140 - the first elastic member; 150 - the locking member; 160 - the second elastic member; 161 - the clamping part; 170 - the anti-falling elastic member; 180 - the anti-falling screw; 190 - the assembly screw; 200 - the measuring mechanism; 210 - the mounting seat; 211 - the second assembly hole; 220 - the measuring block; 230 - the guide block; 231 - the second guide groove; 240 - the probe sensor; 250 - the adjusting screw; 260 - the adjusting nut; 270 - the third elastic member. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0034] It should be noted that like reference numerals and letters refer to like items throughout the accompanying drawings, and once an item is defined in one drawing, it is not necessary to further define and explain it in subsequent drawings.

[0035] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed during use, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first", "second", "third", and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0036] In addition, the terms "horizontal", "vertical", and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0037] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided", "mounted", "connected", "linked" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] At present, when testing the inner and outer tooth angular error of a planetary gear, a spline shaft is usually used to position the spline hole of the planetary gear. Since the spline shaft is uniformly distributed with a number of spline grooves equal to the number of spline grooves in the spline hole, each spline groove has a manufacturing tolerance, and the cumulative tolerance of multiple spline grooves is large. The spline shaft and the spline hole are prone to interference fit or clearance fit. As such, the dimensional tolerance of the spline shaft itself will cause a large positioning error, reducing the positioning accuracy. Specifically, when the interference fit occurs, the planetary gear and the spline shaft are difficult to disassemble and assemble, the assembly efficiency is low, the testing efficiency is low, and the cost is high. When the clearance fit occurs, the tooth thickness error will cause the spline shaft to rotate during measurement, and the rotation angle is recorded as the angular error, resulting in low measurement accuracy.

[0039] In view of this, the designer designs a planetary gear inner and outer tooth angular error measuring device, which can improve the measuring precision on the premise of ensuring the assembly efficiency, that is, can take into account the measuring efficiency and measuring precision at the same time.

[0040] Please combine Figures 3-9 In the embodiment, the planetary gear inner and outer tooth angular error measuring device comprises a positioning mechanism 100 and a measuring mechanism 200. The positioning mechanism 100 is used for positioning a standard planetary gear or a planetary gear to be measured 001, and the positioning mechanism 100 can be adaptively adjusted according to the size of the spline hole of the planetary gear, so as to ensure that the positioning mechanism 100 is tightly matched with the spline hole, and to improve the interference fit and the clearance fit. The measuring mechanism 200 can measure the inner and outer tooth angular error of the planetary gear after positioning.

[0041] Please combine Figure 3 , Figure 4 , Figures 7-9 In the embodiment, optionally, the positioning mechanism 100 comprises a positioning table 110, a plurality of positioning pins, a first elastic member 140, a locking member 150, a second elastic member 160 and an anti-dropping elastic member 170. The plurality of positioning pins are connected with the positioning table 110, and at least one of the plurality of positioning pins is set as a floating pin 130, and the floating pin 130 is slidably connected with the positioning table 110. Each positioning pin is used for engaging with the inner tooth groove of the planetary gear.

[0042] It should be noted that the first elastic member 140, the second elastic member 160 and the anti-dropping elastic member 170 can be a spring, a spring piece or a rubber piece. For example, in the embodiment, the first elastic member 140 is a spring, and the second elastic member 160 and the anti-dropping elastic member 170 are spring pieces.

[0043] It should be noted that the number of positioning pins is set as required. For example, in the embodiment, the number of positioning pins is two, one of which is a floating pin 130, and the other is a fixed pin 120. The fixed pin 120 is fixed on the positioning table 110, and the floating pin 130 is slidably connected with the positioning table 110 in the first direction 002, and the floating pin 130 is connected with the positioning table 110 through the first elastic member 140. The first elastic member 140 makes the floating pin 130 have a movement trend close to the fixed pin 120. The floating pin 130 and the fixed pin 120 are both used for being inserted into the spline hole of the planetary gear, and can be engaged with two spline grooves one by one respectively, so as to realize positioning.

[0044] When in use, the floating pin 130 is close to the fixed pin 120 due to the elastic force of the first elastic member 140, the distance between the floating pin 130 and the fixed pin 120 is small, and the distance is smaller than the diameter of the spline hole of the planetary gear, so that the planetary gear is sleeved on the floating pin 130 and the fixed pin 120 through the spline hole, meanwhile, the fixed pin 120 is engaged with one spline groove in the spline hole, then the locking member 150 is inserted between the floating pin 130 and the fixed pin 120, and the second elastic member 160 is located between the locking member 150 and the floating pin 130, the elastic force of the second elastic member 160 is greater than that of the first elastic member 140, so that the second elastic member 160 can overcome the elastic force of the first elastic member 140 and push the floating pin 130 away from the fixed pin 120, the floating pin 130 is engaged with another spline groove in the spline hole, so that the positioning of the planetary gear is completed. The floating pin 130 is abutted in the spline groove through the elastic force of the second elastic member 160, the contact between them is reliable, the floating pin 130 and the spline groove are neither prone to interference fit nor prone to clearance fit, and the positioning effect is good.

[0045] Please refer to Figure 1 and Figure 2 It should be noted that the spline groove on the planetary gear engaged with the fixed pin 120 can be called the phase tooth groove 011, the spline groove engaged with the floating pin 130 can be called the relative tooth groove 012, and the external tooth groove matched with the measuring mechanism 200 can be called the measuring tooth groove 013. When the planetary gear is positioned, the measuring mechanism 200 is matched with the measuring tooth groove 013, so that the inner and outer tooth angular error can be obtained.

[0046] Please refer to Figure 7 Optionally, the positioning table 110 has a top surface and a bottom surface, and the bottom surface is used to support on the workbench surface. The top surface is provided with a first fixed hole 111, a second fixed hole 112, a first assembly hole 113 and a first guide groove 114. The first guide groove 114, the first fixed hole 111 and the second fixed hole 112 are arranged in sequence in the first direction 002. The first guide groove 114 is a strip-shaped groove and extends in the second direction 003 perpendicular to the first direction 002. The first fixed hole 111 is a circular hole, and two opposite first anti-rotation planes 115 are arranged on the hole wall of the first fixed hole 111. The second fixed hole 112 is provided with a step 116, and the height of the step 116 is higher than that of the bottom of the second fixed hole 112. The first assembly hole 113 extends along the first direction 002, one end of the first assembly hole 113 extends to the outer circumferential surface of the positioning table 110, and the other end communicates with the side of the second fixed hole 112 away from the step 116, and at least part of the first assembly hole 113 can be provided as a threaded hole section.

[0047] Please refer to Figure 8Optionally, the fixing pin 120 comprises a first pin body 121 and a first limiting block 122 connected with each other. The first pin body 121 is a cylinder, and the first limiting block 122 is a rectangular block. Two second anti-rotation planes 123 are arranged on the first pin body 121 oppositely. A first positioning groove 124 is arranged on the side of the first limiting block 122 away from the first pin body 121. The first limiting block 122 is spaced apart from the anti-rotation planes in the axial direction of the first pin body 121, and a first guide inclined surface 125 is arranged on the side of the first limiting block 122 away from the anti-rotation planes.

[0048] Please combine Figure 9 Optionally, the floating pin 130 comprises a second pin body 131, a second limiting block 132 and a third limiting block 133 connected with each other. The second pin body 131 is a cylinder, and an abutting plane 134 is arranged on the second pin body 131. The second limiting block 132 and the third limiting block 133 are both rectangular blocks. The second limiting block 132 and the third limiting block 133 are arranged in a spaced apart manner in the axial direction of the second pin body 131. The second limiting block 132 is arranged close to the abutting plane 134. A second positioning groove 135 is arranged on the side of the third limiting block 133 away from the second pin body 131, and a second guide inclined surface 136 is arranged on the side of the third limiting block 133 away from the second limiting block 132.

[0049] Please combine Figure 3 and Figure 4 Meanwhile, the locking piece 150 has two mounting side surfaces arranged oppositely. One second elastic piece 160 is mounted on each mounting side surface. The second elastic piece 160 is provided with an outwardly protruding clamping portion 161. When the locking piece 150 is inserted between the floating pin 130 and the fixing pin 120, the two second elastic pieces 160 abut against the first pin body 121 and the second pin body 131 respectively, so that the second pin body 131 has a movement tendency away from the first pin body 121, and the first pin body 121 and the second pin body 131 can reliably abut against the spline groove of the planetary gear, achieving accurate positioning. When the locking piece 150 is inserted to a proper position, the clamping portions 161 of the two second elastic pieces 160 are clamped with the first positioning groove 124 and the second positioning groove 135 respectively, so as to stabilize the positions of the locking piece 150, the fixing pin 120 and the floating pin 130.

[0050] It should be understood that, since the first guide slope 125 is arranged on the first limiting block 122, the second guide slope 136 is arranged on the third limiting block 133, and the locking member 150 is inserted between the floating pin 130 and the fixed pin 120, the locking member 150 first contacts the first guide slope 125 and the second guide slope 136, the first guide slope 125 and the second guide slope 136 have the function of guiding the locking member 150, the interference between the locking member 150 and the fixed pin 120 and the floating pin 130 is reduced, and the locking member 150 is facilitated to be inserted between the fixed pin 120 and the floating pin 130. Obviously, in other embodiments, a guide slope can be arranged on the locking member 150, the guide slope can be an annular taper, and when the locking member 150 is inserted, the guide slope also has the function of guiding the locking member 150 to be inserted between the fixed pin 120 and the floating pin 130.

[0051] In other embodiments, the locking member 150 and the second elastic member 160 can be an integrated structure, that is, part or all of the locking member 150 can be arranged as an elastic body structure, which can overcome the elastic force of the first elastic member 140 and make the floating pin 130 and the fixed pin 120 abut against the planet gear. For example, the locking member 150 can be arranged as a rubber body, and the structure of the second elastic member 160 can be omitted.

[0052] The assembly mode of the positioning mechanism 100 provided in the embodiment is as follows:

[0053] Please combine Figures 3-6The first pin body 121 of the fixing pin 120 is inserted into the first fixing hole 111, and the second anti-rotation plane 123 on the first pin body 121 is attached to the corresponding first anti-rotation plane 115 in the first fixing hole 111, so that the fixing pin 120 cannot rotate relative to the first fixing hole 111, and the fixing pin 120 is in interference fit with the first fixing hole 111. The second pin body 131 of the floating pin 130 and the second limiting block 132 are inserted into the second fixing hole 112, the third limiting block 133 and the first limiting block 122 are opposite, and the first positioning groove 124 and the second positioning groove 135 are consistent in height. The first elastic member 140 is arranged in the first assembly hole 113, one end of the first elastic member 140 is in contact with the abutting plane 134 on the second pin body 131, the assembly screw 190 is screwed into the first assembly hole 113, and the assembly screw 190 is in abutment with the end of the first elastic member 140 away from the second pin body 131. In this way, the first elastic member 140 makes the floating pin 130 have a movement trend close to the fixing pin 120, and makes the second pin body 131 abut against the side of the step 116, thereby limiting the minimum distance between the fixing pin 120 and the floating pin 130. The anti-disengagement screw 180 is screwed onto the step 116, and the anti-disengagement screw 180 can abut against the side of the second limiting block 132 close to the third limiting block 133, thereby preventing the floating pin 130 from disengaging from the top of the second fixing hole 112. At the same time, the anti-disengagement elastic member 170 is arranged in the second fixing hole 112, and the anti-disengagement elastic member 170 is in abutment with the second pin body 131, so that the second pin body 131 has a movement trend in the second direction 003, and the second pin body 131 is always in abutment with the hole wall of the second fixing hole 112. In this way, the floating pin 130 can only slide relative to the positioning table 110 in the first direction 002, the movement of the floating pin 130 is stable and reliable, and the positioning of the planetary gear is facilitated.

[0054] It should be noted that when the positioning mechanism 100 is used to position the planetary gear, the locking member 150 has a locking position and an unlocking position which are switched with each other. When in the unlocking position, the locking member 150 is not inserted between the fixing pin 120 and the floating pin 130, and at this time, the distance between the floating pin 130 and the fixing pin 120 is smallest under the action of the first elastic member 140, thereby facilitating the assembly of the planetary gear. When in the locking position, the locking member 150 is inserted between the floating pin 130 and the fixing pin 120, and the floating pin 130 and the fixing pin 120 are both abutted on the planetary gear through the second elastic member 160.

[0055] Please refer to Figures 2-4In the embodiment, the measurement mechanism 200 comprises a mounting base 210, a measurement block 220, a guide block 230, a probe sensor 240, an adjusting screw 250, an adjusting nut 260 and a third elastic member 270. The mounting base 210 is fixedly connected with the positioning table 110 by screws or bolts. The measurement block 220 is connected with the mounting base 210 by the adjusting screw 250, the adjusting nut 260 and the third elastic member 270. The measurement block 220 can slide relative to the mounting base 210 in the first direction 002. The measurement block 220 and the mounting base 210 are clearance-fitted in the second direction 003, so that the measurement block 220 can also slide relative to the mounting base 210 in the second direction 003. The guide block 230 is slidably connected with the first guide groove 114 in the second direction 003, and the two are relatively fixed in the first direction 002. The guide block 230 is provided with a second guide groove 231. The measurement block 220 and the second guide groove 231 are slidably connected in the first direction 002, and the two are relatively fixed in the second direction 003, so that the measurement block 220 can drive the guide block 230 to slide relative to the positioning table 110 in the second direction 003. The probe sensor 240 is connected with the mounting base 210, and is used to obtain the position of the measurement block 220. By setting the guide block 230 to limit the movement mode of the measurement block 220, the measurement block 220 is prevented from rotating relative to the positioning table 110 during the measurement process, so as to affect the measurement precision.

[0056] Optionally, the mounting base 210 is provided with a second assembly hole 211 extending in the first direction 002, the adjusting screw 250 is arranged in the second assembly hole 211, and both ends of the adjusting screw 250 extend out of the second assembly hole 211, wherein one end of the adjusting screw 250 is connected with the measuring block 220, and the other end of the adjusting screw 250 is screwed with the adjusting nut 260, that is, the mounting base 210 is located between the adjusting nut 260 and the measuring block 220. The third elastic member 270 is a spring, the third elastic member 270 is sleeved on the adjusting screw 250, one end of the third elastic member 270 abuts against the measuring block 220, and the other end of the third elastic member 270 abuts against the mounting base 210. The position of the knob adjusting nut 260 on the adjusting screw 250 can be changed, so that the elastic force of the third elastic member 270 can be adjusted, the third elastic member 270 has the elastic force to push the measuring block 220 to the measuring tooth groove 013 of the planetary gear, and the measuring block 220 can reliably abut against the measuring tooth groove 013. Moreover, the adjusting screw 250 and the second assembly hole 211 are gap-fitted, and the gap is greater than the displacement amount of the measuring block 220 in the tangent direction of the gear circle (the second direction 003) caused by the inner and outer tooth angular error of the planetary gear 001. Specifically, when the knob adjusting nut 260 has a movement trend close to the measuring block 220, since the adjusting nut 260 is limited by the mounting base 210, the adjusting screw 250 drives the measuring block 220 to move away from the planetary gear, and the compression amount of the third elastic member 270 increases, at this time, the planetary gear is facilitated to be assembled. After the planetary gear is positioned, the adjusting nut 260 is reversely rotated, and under the driving of the third elastic member 270, the measuring head abuts against the measuring tooth groove 013 of the planetary gear.

[0057] Optionally, the measuring head sensor 240 can be fixed on the mounting base 210 through a screw, the measuring head sensor 240 can acquire the displacement of the measuring head in the second direction 003, so as to acquire the inner and outer tooth angular error through the data. The measuring head sensor 240 is a known structure, and will not be specifically described in the embodiment. For example, the measuring head sensor 240 is a distance sensor.

[0058] The use mode of the planetary gear inner and outer tooth angular error measuring device provided in the embodiment is as follows:

[0059] Please refer to Figure 1 and Figure 2The standard planetary gear is positioned by the positioning mechanism 100 first, then the measuring block 220 is abutted with the measuring tooth groove 013 of the standard planetary gear, the probe sensor 240 is adjusted to be zeroed, so that the calibration of the probe sensor 240 is realized. Then, the standard planetary gear is removed, the planetary gear to be measured 001 is positioned by the positioning mechanism 100, and the measuring block 220 is abutted with the measuring tooth groove 013 of the planetary gear to be measured 001, the corresponding data is obtained by the probe sensor 240, and the inner and outer tooth angular error of the planetary gear to be measured 001 can be calculated.

[0060] The planetary gear positioning operation is convenient and flexible, the positioning efficiency is high, and the positioning pin can be closely combined with the spline hole, so that the positioning effect is good. In the inserting process of the measuring block 220 and the measuring tooth groove 013 of the planetary gear, the measuring block 220 will not be deflected, and the accuracy of the measurement result is high.

[0061] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A device for measuring the internal and external tooth angle error of a planetary gear, characterized in that, include: The system includes a positioning mechanism and a measuring mechanism. The positioning mechanism comprises a positioning platform and multiple positioning pins, all of which are connected to the positioning platform. At least one of the positioning pins is configured as a floating pin, which is slidably connected to the positioning platform. Each positioning pin is used to mesh with the internal tooth groove of a planetary gear. The measuring mechanism is connected to the positioning mechanism and is used to obtain the internal and external tooth angle errors of the planetary gear under test. The floating pin is connected to the positioning platform via a first elastic element, which is used to give the floating pin a tendency to move from the outside to the inside. The positioning mechanism further includes a locking member, which has a lock position and an unlock position that can be switched between each other. When in the lock position, the locking member is inserted into the locking area formed by the multiple positioning pins, and the locking member is in elastic contact with the floating pin, and can overcome the elastic force of the first elastic member and make the floating pin have a tendency to move from the inside to the outside. When in the unlock position, the locking member leaves the locking area.

2. The planetary gear internal and external tooth angle error measuring device according to claim 1, characterized in that: The locking element includes a main body and a second elastic element, the second elastic element being connected to the main body; when in the locked position, the main body and the second elastic element are inserted into the locking area, and the second elastic element can abut against the floating pin, so that the floating pin has a tendency to move from the inside out.

3. The planetary gear internal and external tooth angle error measuring device according to claim 2, characterized in that: The floating pin is provided with a positioning groove, and the second elastic element can be engaged in the positioning groove when it is in the locked position.

4. The planetary gear internal and external tooth angle error measuring device according to any one of claims 1-3, characterized in that: Each of the positioning pins has a first guide slope on the side away from the positioning platform, or a second guide slope is provided on the locking member. The first guide slope is used to abut against the locking member to make the floating pin have a tendency to move from the inside out; the second guide slope is used to abut against the multiple positioning pins to make the floating pin have a tendency to move from the inside out.

5. The planetary gear internal and external tooth angle error measuring device according to claim 1, characterized in that: The positioning platform is provided with a fixing hole, and the floating pin is slidably connected to the fixing hole, and the floating pin and the fixing hole are fixed relative to each other in the circumferential direction of the floating pin.

6. The planetary gear internal and external tooth angle error measuring device according to claim 1, characterized in that: The measuring mechanism includes a mounting base, a measuring block, a guide block, and a probe sensor. The mounting base is fixedly connected to the positioning stage. The measuring block is slidably connected to the mounting base in a first direction with a clearance fit. The guide block is slidably connected to the positioning stage in a second direction, and the two are relatively fixed in the first direction. The measuring block and the guide block are slidably connected in the first direction and relatively fixed in the second direction, so that the measuring block can drive the guide block to slide relative to the positioning stage in the second direction. The probe sensor is connected to the mounting base and is used to obtain the position of the measuring block.

7. The planetary gear internal and external tooth angle error measuring device according to claim 6, characterized in that: The positioning platform is provided with a first guide groove, and the guide block is slidably connected to the first guide groove in the second direction; the guide block is provided with a second guide groove, and the measuring block is slidably connected to the second guide groove along the first direction.

8. The planetary gear internal and external tooth angle error measuring device according to claim 7, characterized in that: The measuring mechanism further includes an adjusting screw, an adjusting nut, and a third elastic element. The adjusting screw is slidably connected to the mounting base in a first direction. One end of the adjusting screw is connected to the measuring block. The adjusting nut is screwed to the adjusting screw and located on the side of the mounting base away from the measuring block. The third elastic element abuts against both the mounting base and the measuring block to give the measuring block a tendency to move closer to the planetary gear.

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