Connection arm and educational robot

Abstract

The application belongs to the technical field of intelligent robots, and particularly relates to a connecting arm and an educational robot. The connecting arm comprises: a first connecting part comprising a first sleeve and a first side wall, the first side wall being connected with the first sleeve; a second connecting part comprising a sleeve cover part and a second side wall, the second side wall being connected with the sleeve cover part, the sleeve cover part being covered on the first sleeve, the first sleeve and the sleeve cover part being matched to fix a first driving member, and the second side wall and the first side wall being oppositely connected; and a rotating inner support, the rotating inner support being rotationally clamped between the first sleeve and the sleeve cover part, and the rotating inner support and the first side wall being matched to fix a second driving member. The technical scheme of the application aims to solve the problems of the existing building block teaching aid, such as complex system structure, too large difficulty and unsuitability for cultivating the scientific interest of students in teaching.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of teaching aids, and particularly relates to a connecting arm and an educational robot. BACKGROUND

[0002] In today's increasingly developed technology, talent training is very important, and accordingly, the guidance and inspiration of the science and technology interest of primary and secondary school students and college students in the education link is particularly important. Especially for primary and secondary school students, their science and technology interest is in the budding stage, and it is necessary to correctly and beneficially guide and inspire the science and technology interest of primary and secondary school students.

[0003] At present, the science and technology education method for primary and secondary school students is classroom learning, and teachers first explain science and technology knowledge to students, and then students understand the theory. This is a typical classroom teaching method, which obviously lacks the process of hands-on practice. Students face boring books and face difficult science and technology knowledge, and are inevitably intimidated, making it difficult for students to develop a strong interest in science.

[0004] Even if some schools or interest summer camps arrange a hands-on segment in the teaching process, the teaching aids used are relatively complex, such as building block teaching aids. For example, a building block teaching aid walking system involves a suspension mechanism, a brake mechanism, a steering mechanism, and the like. For primary and secondary school students, the system structure is complex and difficult, and is not suitable for teaching to cultivate the science interest of primary and secondary school students. SUMMARY

[0005] The application aims to provide a connecting arm and an educational robot, and aims to solve the problem of the complex system structure of the walking system in the existing building block teaching aid, which is too difficult and is not suitable for teaching to cultivate the science interest of primary and secondary school students.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the application is: a connecting arm, comprising:

[0007] A first connecting portion comprising a first sleeve and a first side wall, the first side wall being connected with the first sleeve;

[0008] A second connecting portion comprising a sleeve cover portion and a second side wall, the second side wall being connected with the sleeve cover portion, the sleeve cover portion being covered on the first sleeve, the first sleeve and the sleeve cover portion being matched to fix a first driving member, and the second side wall and the first side wall being oppositely connected;

[0009] A rotating inner support, the rotating inner support being rotationally clamped between the first sleeve and the sleeve cover portion, the rotating inner support and the first side wall being matched to fix a second driving member.

[0010] In an embodiment, the second side wall and the first side wall are connected to form opposite first and second avoiding openings, the first side wall is provided with a first mounting through hole at a position opposite to the first sleeve, the rotating inner support comprises a second sleeve and a curved frame, two ends of the curved frame are connected to the second sleeve, the second sleeve is rotationally clamped between the first sleeve and the cylinder cover, the curved frame can rotate through the first avoiding opening or the second avoiding opening, the curved frame is provided with a second mounting through hole at a position opposite to the second sleeve, and the first mounting through hole and the second mounting through hole are used for mounting two mounting lugs of the second driving member.

[0011] In an embodiment, the curved frame is shaped as a track profile, and the curved frame is smoothly transitioned towards the outer side wall of the first mounting through hole.

[0012] In an embodiment, the curved frame is provided with a recessed groove towards the outer side wall of the first mounting through hole, and the extension direction of the recessed groove is consistent with the extension direction of the curved frame.

[0013] In an embodiment, the first sleeve is provided with a plurality of notches at intervals towards the end of the cylinder cover, the cylinder cover covers the notches to form a sliding guide groove, the inner wall of the second sleeve is provided with a plurality of clamping protrusions, each clamping protrusion is located in one of the notches in a one-to-one correspondence, and the clamping protrusion slides in the sliding guide groove, the periphery of the cylinder cover is provided with a stop protrusion, the clamping protrusion and the stop protrusion are arranged at intervals, and the clamping protrusion and the stop protrusion are matched to clamp and fix one side wall of a clamping groove of an output end shell of the first driving member.

[0014] In an embodiment, the number of notches is two, the two notches are symmetrically arranged relative to the center axis of the first sleeve, and the number of clamping protrusions is two, the two clamping protrusions are symmetrically arranged relative to the center axis of the second sleeve.

[0015] In an embodiment, one side of each clamping protrusion towards the stop protrusion is arranged as a curved surface protruding towards the stop protrusion.

[0016] In an embodiment, the curved frame is curved and shaped as a track profile, and the curved frame is smoothly arranged towards the outer side wall of the first mounting through hole.

[0017] In an embodiment, the curved frame is provided with a recessed groove towards the outer side wall of the first mounting through hole, and the extension direction of the recessed groove is consistent with the extension direction of the curved frame.

[0018] According to another aspect of the present application, an educational robot is provided. Specifically, the educational robot comprises the connecting arm as described above.

[0019] The present application has at least the following beneficial effects:

[0020] The application provides an educational robot and a connecting arm used in the educational robot.

[0021] Moreover, students can understand the structural design of the connecting arm, deeply understand the structural assembly relationship among the first connecting part, the second connecting part and the rotating inner support, and deeply explore how the first connecting part, the second connecting part and the rotating inner support are matched to install and fix the driving part, thereby leading students to cultivate the cognition and desire for scientific knowledge from simple to complex, and to cultivate strong interest in science. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor under the premise of the drawings.

[0023] Figure 1 The assembly structure diagram of the wheel group structure assembled by the connecting arm in the educational robot of the embodiment of the present application;

[0024] Figure 2 The exploded view of the wheel group structure assembled by the connecting arm in the educational robot of the embodiment of the present application;

[0025] Figure 3 The assembly structure diagram of the connecting arm in the educational robot of the embodiment of the present application;

[0026] Figure 4 The exploded view of the connecting arm in the educational robot of the embodiment of the present application;

[0027] Figure 5 The assembly structure diagram of the driving part in the educational robot of the embodiment of the present application Figure 1 ;

[0028] Figure 6 The assembly structure diagram of the driving part in the educational robot of the embodiment of the present application Figure 2 ;

[0029] Figure 7 The exploded view of the wheel and the driving part in the educational robot of the embodiment of the present application;

[0030] Figure 8 An assembly structure schematic diagram of the walking system of the educational robot of the embodiment of the present application is formed by assembling four wheel groups;

[0031] Figure 9 An assembly structure schematic diagram of the walking system of the educational robot of the embodiment of the present application is formed by assembling four wheel groups;

[0032] Figure 10 An assembly structure schematic diagram of the walking system of the educational robot of the embodiment of the present application is formed by assembling four wheel groups; Figure 1 ;

[0033] Figure 11 An assembly structure schematic diagram of the walking system of the educational robot of the embodiment of the present application is formed by assembling four wheel groups; Figure 1 ;

[0034] Figure 12 An assembly structure schematic diagram of the walking system of the educational robot of the embodiment of the present application is formed by assembling four wheel groups; Figure 2 ;

[0035] Figure 13 An assembly structure schematic diagram of the walking system of the educational robot of the embodiment of the present application is formed by assembling four wheel groups; Figure 2 ;

[0036] Figure 14 An assembly structure schematic diagram of the walking system of the educational robot of the embodiment of the present application is formed by assembling four wheel groups; Figure 13 An enlarged schematic diagram of A in the above figure;

[0037] Figure 15 An assembly structure schematic diagram of the expandable mechanical arm and the adapter of the educational robot of the embodiment of the present application;

[0038] Figure 16 An assembly structure schematic diagram of the expandable mechanical arm and the adapter of the educational robot of the embodiment of the present application;

[0039] Figure 17 An assembly structure schematic diagram of the head end section arm of the expandable mechanical arm of the educational robot of the embodiment of the present application;

[0040] Figure 18 An assembly structure schematic diagram of the head end section arm of the expandable mechanical arm of the educational robot of the embodiment of the present application;

[0041] Figure 19 An assembly structure schematic diagram of the tail end structure of the expandable mechanical arm of the educational robot of the embodiment of the present application;

[0042] Figure 20 An assembly structure schematic diagram of the tail end structure of the expandable mechanical arm of the educational robot of the embodiment of the present application. DETAILED DESCRIPTION

[0043] The embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar components are denoted by the same or similar reference numerals throughout the drawings. The embodiments described below are exemplary and are intended to explain the present application, and should not be understood as limiting the present application.

[0044] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying 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.

[0045] In addition, the terms "first", "second", and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second", and the like can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0046] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between 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.

[0047] As shown in Figure 1 , Figure 2 , Figures 8 to 13 The educational robot of the embodiments of the present application adopts a wheeled walking system. Preferably, the wheeled walking system includes four wheel group structures 10, as shown in Figure 1 and Figure 8 The four wheel group structures 10 are of the same structure, and each wheel group structure 10 has independent adjustment functions, wherein the adjustment functions include lifting or lowering the overall height of the intelligent vehicle and independently adjusting the speed of the wheels 11.

[0048] As shown in Figure 1 and Figure 2As shown in the drawings, each wheel set structure 10 comprises a wheel 11, a connecting arm 12 and two driving members 13. The connecting arm 12 serves as a supporting installation carrier of the wheel set structure 10, one of the driving members 13 is installed at a first end of the connecting arm 12, and the other driving member 13 and the wheel 11 are detachably assembled to form a driving wheel module.

[0049] As shown in the drawings, Figures 2 to 4 The connecting arm 12 comprises a first connecting portion 121, a second connecting portion 122 and a rotating inner support 123.

[0050] As shown in the drawings, Figure 4 The first connecting portion 121 comprises a first sleeve 1211 and a first side wall 1212, and the two ends of the first side wall 1212 are connected to the first sleeve 1211 to form the first connecting portion 121 with a track-shaped contour (the contour of the first side wall 1212 is half of a track shape). The first sleeve 1211 is located at a first end of the first connecting portion 121, and the first side wall 1212 forms a second end of the first connecting portion 121 opposite the first sleeve 1211. As shown in the drawings, Figure 2 and Figure 4 A plurality of clamping holes 1213 are formed on the first sleeve 1211 and are distributed circumferentially around the central axis of the first sleeve 1211, and as shown in the drawings, Figure 3 and Figure 4 A first installation through hole 1214 is formed on the first side wall 1212 as the second end of the first connecting portion 121.

[0051] As shown in the drawings, Figure 4 The second connecting portion 122 comprises a sleeve cover portion 1221 corresponding to the first sleeve 1211 and a second side wall 1222, and the two ends of the second side wall 1222 are connected to the sleeve cover portion 1221 to form a track shape consistent with the half track shape of the first side wall 1212. The sleeve cover portion 1221 is provided with a plurality of hooks 1223 corresponding to the plurality of clamping holes 1213, and the sleeve cover portion 1221 is adaptively covered on the first sleeve 1211, and each hook 1223 is buckled in the corresponding clamping hole 1213. Specifically, the peripheral edge of the sleeve cover portion 1221 is provided with a stop protrusion 1224, and the end of the first sleeve 1211 towards the sleeve cover portion 1221 is provided with a plurality of notches 1215, as shown in the drawings, Figure 2 and Figure 4 When the sleeve cover portion 1221 is covered on the first sleeve 1211, the notches 1215 and the sleeve cover portion 1221 form a sliding guide groove. Specifically, there are two symmetrical notches 1215 on the end of the first sleeve 1211. When the sleeve cover portion 1221 is covered on the first sleeve 1211, the second side wall 1222 is adaptively butted against the first side wall 1212 and fixed together by screws. As shown in the drawings, Figure 3As shown, the first side wall 1212 and the second side wall 1222 abut to form two opposite first avoiding openings 1231 and second avoiding openings 1232, and the first mounting through hole 1214 is located on the second side wall 1222 between the first avoiding openings 1231 and the second avoiding openings 1232.

[0052] As shown, Figure 4 The rotating inner support 123 includes a second sleeve 1233 and a curved frame 1234, two ends of the curved frame 1234 are connected to the second sleeve 1233 to form a track-shaped rotating inner support 123, and the curved frame 1234 is smoothly arranged towards the outer side wall of the first mounting through hole 1214, preferably in a circular arc. The second sleeve 1233 is located at the first end of the rotating inner support 123, and the curved frame 1234 forms the second end of the rotating inner support 123 opposite the second sleeve 1233. The second sleeve 1233 is rotatably sleeved on the first sleeve 1211, and the inner wall of the second sleeve 1233 is provided with a plurality of clamping protrusions 1235, each clamping protrusion 1235 is correspondingly located in the notch 1215, and the corresponding second sleeve 1233 is provided with two opposite clamping protrusions 1235. Then the second connecting part 122 is coveringly connected to the first connecting part 121, at this time the second sleeve 1233 is blocked by the sleeve cover part 1221 and cannot be separated from the first sleeve 1211, and the clamping protrusions 1235 and the stop protrusions 1224 are spaced apart.

[0053] When the second connecting part 122 is coveringly connected to the first connecting part 121, the curved frame 1234 can pass through the first avoiding opening 1231 or the second avoiding opening 1232, and the clamping protrusion 1235 can slide in the sliding guide groove during the rotation of the rotating inner support 123 around the central axis of the first sleeve 1211. When the curved frame 1234 is located at a spatial position between the first avoiding opening 1231 and the second avoiding opening 1232, the clamping protrusion 1235 is located at the middle position of the notch 1215, that is, at this time the curved frame 1234 can be rotated towards the first avoiding opening 1231 and pass through the first avoiding opening 1231, and can also be rotated towards the second avoiding opening 1232 and pass through the second avoiding opening 1232. The curved frame 1234 as the second end of the rotating inner support 123 is provided with a second mounting through hole 1236, when the curved frame 1234 is located at a spatial position between the first avoiding opening 1231 and the second avoiding opening 1232, at this time the second mounting through hole 1236 and the first mounting through hole 1214 are opposite and have a spacing therebetween. And the curved frame 1234 as the second end of the rotating inner support 123 forms a recessed groove 1237 towards the outer side wall of the first mounting through hole 1214, the extension direction of the recessed groove 1237 is consistent with the extension direction of the curved frame 1234.

[0054] As shown, Figure 5 and Figure 6As shown, the driving member 13 comprises a first housing 131, a second housing 132, an output end housing 133 and internal components (not shown, the internal components generally comprise a circuit board, a driving motor, a speed reduction mechanism and an output shaft, etc., which are basically the same as the internal components of the existing steering gear, thus not described again). The first housing 131 and the second housing 132 are fixedly connected to each other to form an assembly inner space, specifically, the first housing 131 and the second housing 132 are fixedly connected by screwing a plurality of screws therebetween, and the internal components are installed in the assembly inner space. The output end housing 133 is installed on the output shaft of the internal components, and the output end housing 133 and the output shaft rotate synchronously, that is, the output end housing 133 rotates relative to the first housing 131 and the second housing 132. Specifically, the output shaft of the internal components extends from one end of the second housing 132 away from the first housing 131, and the output end housing 133 is located at the one end of the second housing 132 away from the first housing 131. Further, the first housing 131 is provided with a plurality of mounting lugs 1311, which are uniformly spaced around the central axis of the first housing 131, and preferably, the first housing 131 is provided with two opposite mounting lugs 1311. Moreover, each mounting lug 1311 is hollow, so that the cable of the internal components can be arranged in the hollow mounting lug 1311, or a plug-in terminal is installed in the hollow mounting lug 1311, and then the cable of the internal components is connected to the plug-in terminal. The side wall of the one end of the output end housing 133 away from the first housing 131 is provided with a plurality of insertion openings 1331 and clamping grooves 1332 corresponding to the insertion openings 1331, which are circumferentially spaced around the central axis of the output end housing 133. Preferably, the output end housing 133 is provided with two opposite insertion openings 1331 and corresponding two clamping grooves 1332.

[0055] As shown in Figure 1 and Figure 2 Two driving members 13 are assembled to the connecting arm 12, one of which is installed at the first end of the connecting arm 12, and the other of which is installed at the second end of the connecting arm 12. Among them, the first end of the connecting arm 12 is formed by the first end of the first connecting part 121, the first end of the second connecting part 122 and the first end of the rotating inner support 123; and the second end of the connecting arm 12 is formed by the second end of the first connecting part 121, the second end of the second connecting part 122 and the second end of the rotating inner support 123.

[0056] As shown in Figure 1 and Figure 2As shown, when one of the driving members 13 is installed to the first end of the connecting arm 12, specifically, the output end shell 133 of the driving member 13 is installed to the first end of the connecting arm 12. Specifically, the output end shell 133 is inserted into the first sleeve 1211, and the two locking protrusions 1235 are inserted into the two corresponding insertion openings 1331. Wherein, before the output end shell 133 is inserted into the first sleeve 1211, the curved frame 1234 of the rotating inner support 123 is first turned out from the position between the first avoiding opening 1231 and the second avoiding opening 1232 to pass through the first avoiding opening 1231 or the second avoiding opening 1232. After the output end shell 133 is inserted into the first sleeve 1211, the rotating inner support 123 is then turned back to the position between the first avoiding opening 1231 and the second avoiding opening 1232, at this time, the locking protrusions 1235 slide into the locking grooves 1332 along the locking grooves 1332. Wherein, the side of the locking protrusions 1235 towards the stop protruding edge 1224 is set as a protruding curved surface, which can be an arc curved surface, or a two-way wedge-shaped surface spliced by two planes with opposite inclined directions, so that the locking protrusions 1235 can more easily slide into the locking grooves 1332. At this time, the side groove wall of the locking grooves 1332 is stopped by the mutual cooperation of the locking protrusions 1235 and the stop protruding edge 1224, at this time, the side groove wall of the locking grooves 1332 abuts against the stop protruding edge 1224. In this way, the driving member 13 is completed to be installed to the first end of the connecting arm 12.

[0057] As Figure 1 and Figure 2As shown, when installing another driving member 13 to the second end of the connecting arm 12, specifically, installing the first housing 131 of this driving member 13 to the second end of the connecting arm 12. Specifically, when inserting the driving member 13 installed to the first end of the connecting arm 12 into the first sleeve 1211, at the same time, the driving member 13 installed to the second end of the connecting arm 12 is placed into the runway-shaped space formed by the abutment of the first side wall 1212 and the second side wall 1222, and one of the two installation lugs 1311 on the first housing 131 of the driving member 13 passes through the first installation through hole 1214. Then, in the process of rotating the inner rotating support 123 back to the position between the first avoiding port 1231 and the second avoiding port 1232, the other installation lug 1311 on the first housing 131 of the driving member 13 corresponds to enter the recessed groove 1237, and slides along the recessed groove 1237 until the installation lug 1311 passes into the second installation through hole 1236. In the process of sliding the installation lug 1311 along the recessed groove 1237, the second side wall 1222 is slightly elastically deformed by the extrusion of the installation lug 1311, so that the installation lug 1311 can slide along the recessed groove 1237 and pass into the second installation through hole 1236. In this way, the two installation lugs 1311 pass into the first installation through hole 1214 and the second installation through hole 1236 respectively, so as to limit the first housing 131 from being detached from the second end of the connecting arm 12, and the two installation lugs 1311 abut against the first side wall 1212 and the second side wall 1222 respectively, so as to clamp the first housing 131 between the first side wall 1212 and the second side wall 1222 without loosening.

[0058] After placing the two driving members 13 into the corresponding positions of the first end and the second end of the connecting arm 12 respectively, rotating the inner rotating support 123 back to the position between the first avoiding port 1231 and the second avoiding port 1232 can simultaneously complete the installation of the two driving members 13 on the connecting arm 12.

[0059] As Figure 7As shown, the wheel 11 comprises a support shell 111, a rotating end cover 112 and a tire 113. The tire 113 is integrally formed of rubber material, and has a certain degree of elasticity and can be elastically expanded to be tightly fitted on the outer circumferential surface of the support shell 111 as a wheel surface. The support shell 111 is provided with a receiving space 1111, and the inner wall of the receiving space 1111 is provided with a plurality of cantilever arms 1112 arranged in a circumferential direction, preferably two cantilever arms 1112 arranged in a central symmetry. Further, the inner wall of the receiving space 1111 is provided with a stepped surface 1113 corresponding to the cantilever arms 1112, and the free ends of the cantilever arms 1112 and the stepped surface 1113 form an assembly opening 1114. The inner side wall of the rotating end cover 112 is provided with a plurality of clamping lugs 1121 extending in a radial direction, preferably two oppositely arranged clamping lugs 1121. When the rotating end cover 112 is installed to the support shell 111, the two clamping lugs 1121 are respectively arranged corresponding to the two assembly openings 1114, so that the assembly openings 1114 are slightly opened, and the clamping lugs 1121 enter between the cantilever arms 1112 and the stepped surface 1113. Normally, when the assembly openings 1114 are not expanded, the clamping lugs 1121 are difficult to be separated from between the cantilever arms 1112 and the stepped surface 1113, so as to limit the rotating end cover 112 on the support shell 111. Further, the clamping lugs 1121 can rotate and slide between the cantilever arms 1112 and the stepped surface 1113.

[0060] As shown in Figure 7 When the wheel 11 and the driving member 13 are assembled, specifically, the wheel 11 is installed to the output end shell 133. The output end shell 133 of the driving member 13 is inserted into the receiving space 1111, and the insertion opening 1331 and the corresponding clamping lug 1121 are aligned with each other until the clamping lug 1121 enters the insertion opening 1331. Then, the rotating end cover 112 is rotated, so that the clamping lug 1121 slides into the clamping groove 1332 along the clamping groove 1332. In this way, one side groove wall of the clamping groove 1332 is stopped by the clamping lug 1121 and the cantilever arm 1112, and at this time, the one side groove wall of the clamping groove 1332 abuts against the cantilever arm 1112. In this way, the installation of the wheel 11 and the driving member 13 is completed, and the driving wheel module (the driving wheel module corresponds to the second end of the connecting arm 12) is assembled.

[0061] As shown in Figures 8 to 13 After the four wheel group structures 10 are assembled, the four wheel group structures 10 are assembled to the vehicle body main body 20, so as to complete the structural assembly of the wheeled walking system of the educational robot.

[0062] As shown in Figures 8 to 13 As shown in Figure 13As shown, the accommodation space 211 is used to install the fixed battery 40, master module 30 and other components. The bottom cover 22 is installed and fixed to the bottom of the vehicle body frame 21 by a plurality of bolts 23. The main body profile shape of the vehicle body frame 21 is a cuboid, and both sides of the bottom of the vehicle body frame 21 are provided with open accommodation grooves 212 along the length direction of the educational robot. Moreover, a plurality of first insertion grooves 213 are provided on the groove wall of the side of the accommodation groove 212 opposite to the bottom cover 22, and specifically, three first insertion grooves 213 are provided on the groove wall of each side of the accommodation groove 212 of the vehicle body frame 21. Correspondingly, a plurality of second insertion grooves 221 are provided on both sides of the bottom cover 22 along the length direction of the educational robot, and the plurality of second insertion grooves 221 and the plurality of first insertion grooves 213 correspond one by one, that is, three second insertion grooves 221 are provided on both sides of the bottom cover 22.

[0063] As shown in Figure 8 and Figure 9 After the assembly of each wheel group structure 10 is completed, the first shell 131 of the driving member 13 at the first end of the connecting arm 12 in each wheel group structure 10 will be installed and fixed to the vehicle body main body 20. As shown in Figure 9 , taking the assembly process of one of the wheel group structures 10 assembled to the left rear end position of the vehicle body main body 20 as an example. Specifically, one of the two mounting lugs 1311 of the first shell 131 of the driving member 13 at the first end of the connecting arm 12 is inserted into the first insertion groove 213 at the left rear end position of the vehicle body frame 21, and then the bottom cover 22 is covered to the bottom of the vehicle body frame 21, so that the other mounting lug 1311 is aligned and inserted into the second insertion groove 221 at the left rear end position of the bottom cover 22, and then the bolts 23 are screwed to connect and fix the bottom cover 22 to the bottom of the vehicle body frame 21. At this time, the two mounting lugs 1311 are respectively inserted into the first insertion groove 213 and the second insertion groove 221, thereby restricting the driving member 13 from being separated from the vehicle body frame 21 and the bottom cover 22. Moreover, the groove wall of the accommodation groove 212 is provided with a first abutting recess 214 corresponding to the position of each first insertion groove 213, which is adapted to the corresponding outer wall position of the first shell 131, and the bottom cover 22 is provided with a second abutting recess 222 corresponding to the position of each second insertion groove 221, which is adapted to the corresponding outer wall position of the first shell 131. When the bottom cover 22 is connected and fixed to the bottom of the vehicle body frame 21 by the bolts 23, the first abutting recess 214 and the second abutting recess 222 respectively abut the corresponding outer wall position of the first shell 131, thereby clamping and fixing the first shell 131, preventing the driving member 13 from shaking relative to the vehicle body main body 20, that is, preventing the wheel group structure 10 from shaking relative to the vehicle body main body 20.

[0064] As shown in Figure 9 and Figure 11As shown, the front end and the rear end of the vehicle body frame 21 are both provided with a third insertion slot 215 along the length direction of the educational robot, and correspondingly, the front end and the rear end of the bottom cover 22 are both provided with a fourth insertion slot 223, and the third insertion slot 215 at the front end of the vehicle body frame 20 is opposite to the fourth insertion slot 223, and the third insertion slot 215 at the rear end of the vehicle body frame 20 is opposite to the fourth insertion slot 223. And the front end of the vehicle body frame 21 is provided with a third abutting recess 216 corresponding to the position of the third insertion slot 215, and the rear end of the vehicle body frame 21 is provided with a third abutting recess 216 corresponding to the position of the third insertion slot 215, and correspondingly, the front end of the bottom cover 22 is provided with a fourth abutting recess 224 corresponding to the position of the fourth insertion slot 223, and the rear end of the bottom cover 22 is provided with a fourth abutting recess 224 corresponding to the position of the fourth insertion slot 223.

[0065] In another embodiment of the educational robot, as shown in FIG. 6, Figures 10 to 13 As shown, the front end and the rear end of the vehicle body frame 21 are both provided with a third insertion slot 215 along the length direction of the educational robot, and correspondingly, the front end and the rear end of the bottom cover 22 are both provided with a fourth insertion slot 223, and the third insertion slot 215 at the front end of the vehicle body frame 20 is opposite to the fourth insertion slot 223, and the third insertion slot 215 at the rear end of the vehicle body frame 20 is opposite to the fourth insertion slot 223. And the front end of the vehicle body frame 21 is provided with a third abutting recess 216 corresponding to the position of the third insertion slot 215, and the rear end of the vehicle body frame 21 is provided with a third abutting recess 216 corresponding to the position of the third insertion slot 215, and correspondingly, the front end of the bottom cover 22 is provided with a fourth abutting recess 224 corresponding to the position of the fourth insertion slot 223, and the rear end of the bottom cover 22 is provided with a fourth abutting recess 224 corresponding to the position of the fourth insertion slot 223.

[0066] The balance car type educational robot uses a gyroscope (not shown) to detect the overall balance of the intelligent vehicle. The gyroscope and the main control module 30 are electrically connected. When the gyroscope detects that the overall balance of the intelligent vehicle is unbalanced, the gyroscope sends an unbalanced signal to the main control module 30, and then the main control module 30 sends an adjustment signal to the driving member 13 of the two driving wheel modules according to the unbalanced signal after receiving the unbalanced signal, so that the two driving members 13 quickly respond to adjust the overall balance of the intelligent vehicle, so that the intelligent vehicle restores balance.

[0067] As shown in FIG. 6, Figure 13As shown, the main control module 30 and battery 40 are assembled, thus the accommodating space 211 is divided into a lower space with a smaller volume and an upper space with a larger volume. The lower space extends directly from the bottom of the upper space, meaning the upper and lower spaces are interconnected. The battery 40 is installed in the lower space, and the main control module 30 is installed in the upper space. Furthermore, the horizontal circumferential contour shape of the upper space matches the contour shape of the main control module 30, and the horizontal circumferential contour shape of the lower space matches the contour shape of the battery 40. Further, the height of the upper space matches the thickness of the main control module 30, and the height of the lower space matches the height of the battery 40, allowing the main control module 30 to be directly stacked on the battery 40, with the corresponding terminals of both directly contacting each other to achieve electrical connection.

[0068] like Figure 13 As shown, the battery 40 has elastic buckles 41 on its sidewalls, and correspondingly, the lower space has corresponding locking interfaces 2113 on its sidewalls that mate with the elastic buckles 41. Specifically, along the length of the educational robot, the battery 40 has an elastic buckle 41 on both its front and rear sidewalls, and the lower space also has corresponding locking interfaces 2113 on its front and rear sidewalls. When the battery 40 is placed in the lower space, the elastic buckles 41 engage with the locking interfaces 2113, thus preventing the battery 40 from falling out of the lower space and preventing it from moving up and down. After the battery 40 is placed, the main control module 30 can be directly placed into the upper space.

[0069] The main body 20 also includes a roof 24.

[0070] In the educational robot of this application, the top cover 24 can be detachably fitted onto the top of the vehicle frame 21 via a snap-fit ​​structure, thereby sealing the main control module 30 placed in the upper space and preventing the main control module 30 from detaching from the upper space. Furthermore, the inner wall of the top cover 24 abuts against the top wall of the main control module 30, thus fixing the main control module 30 between the top cover 24 and the battery 40. By disengaging the snap-fit ​​structure, the top cover 24 can be removed from the vehicle frame 21, allowing for maintenance, replacement, and other operations on components such as the main control module 30 and the battery 40.

[0071] In one embodiment, the top cover 24 can be locked to the top of the vehicle frame 21 by multiple screws, thereby covering the main control module 30 placed in the upper space and preventing the main control module 30 from coming out of the upper space. Furthermore, the inner wall of the top cover 24 abuts against the top wall of the main control module 30, thus fixing the main control module 30 between the top cover 24 and the battery 40. The top cover 24 can be removed from the vehicle frame 21 by unscrewing the screws, allowing for maintenance, replacement, and other operations on components such as the main control module 30 and the battery 40.

[0072] In one embodiment, as shown in Figure 13 one side of the top cover 24 is reversibly mounted to the vehicle body frame 21 by a pin shaft 25, and the other side of the top cover 24 opposite to the pin shaft 25 is provided with a barb, and the corresponding position of the vehicle body frame 21 is provided with a buckle position 217. When the top cover 24 is reversed around the pin shaft 25 to cover the top of the vehicle body frame 21, the barb and the buckle position 217 are locked with each other, thereby capping the master control module 30 placed in the upper space and preventing the master control module 30 from falling out of the upper space. Moreover, the inner wall of the top cover 24 abuts against the top wall of the master control module 30, so that the master control module 30 is fixed between the top cover 24 and the battery 40. By unlocking the barb and the buckle position 217, the top cover 24 can be reversed around the pin shaft 25 from the vehicle body frame 21 to be opened, and then the master control module 30, the battery 40 and other components can be maintained, replaced and the like.

[0073] As shown in Figure 15 and Figure 16 the educational robot further comprises a mechanical arm 50, which is detachably mounted to the vehicle body frame 21 through an adapter 51.

[0074] As shown in Figure 13 and Figure 14 along the length direction of the educational robot, the left and right sides of the top opening of the vehicle body frame 21 are each provided with a plurality of access openings 218 and a plurality of clamping grooves 219, the plurality of clamping grooves 219 and the plurality of access openings 218 are one-to-one corresponding and communicating, and each clamping groove 219 is located at the same side direction of the corresponding access opening 218. Specifically, the left and right sides of the top opening of the vehicle body frame 21 are each provided with two access openings 218 and two clamping grooves 219.

[0075] As shown in Figure 15 and Figure 16 along the length direction of the educational robot, the left and right sides of the adapter 51 are each provided with a plurality of clamping blocks 511. Specifically, the left and right sides of the adapter 51 of the present embodiment are each provided with two clamping blocks 511.

[0076] When the mechanical arm 50 is assembled to the vehicle body frame 21 through the adapter 51, the top cover 24 needs to be removed from the top of the vehicle body frame 21 first, so that each access opening 218 on the top of the vehicle body frame 21 is exposed. Then, each clamping block 511 of the adapter 51 is aligned with the corresponding each access opening 218, so that each clamping block 511 enters from the corresponding each access opening 218. Then, the adapter 51 is pushed flat, so that each clamping block 511 slides into the corresponding clamping groove 219. In this way, the adapter 51 is clamped and fixed on the vehicle body frame 21, that is, the mechanical arm 50 is assembled on the vehicle body frame 21 through the adapter 51.

[0077] In order to prevent the clamping block 511 from sliding out of the clamping groove 219 and causing the mechanical arm 50 to be detached from the vehicle body frame 21, the upper surface (and / or the lower surface) of each clamping block 511 is provided with at least one anti-extraction protrusion 512, as shown in Figure 15 Correspondingly, the upper groove wall (and / or the lower groove wall) of the clamping groove 219 is provided with at least one matching protrusion 2191, as shown in Figure 14 During the sliding of the clamping block 511 into the clamping groove 219, the anti-extraction protrusion 512 is pressed against the matching protrusion 2191, and the anti-extraction protrusion 512 passes over the matching protrusion 2191, so that the matching protrusion 2191 can block the anti-extraction protrusion 512, thereby preventing the clamping block 511 from sliding out of the clamping groove 219.

[0078] When it is necessary to remove the mechanical arm 50 from the vehicle body frame 21, the adapter 51 is pulled to make the clamping block 511 slide towards the entrance 218, so that the anti-extraction protrusion 512 is again pressed against the matching protrusion 2191, and then passes over the matching protrusion 2191, so that the clamping block 511 can be detached from the entrance 218.

[0079] The mechanical arm 50 is an extensible mechanical arm, that is, the extension length of the mechanical arm 50 can be extended, and the activity freedom and activity flexibility of the mechanical arm 50 are not affected. As shown in Figure 15 and Figure 16 The mechanical arm 50 includes a head end section arm 513, a terminal section arm 514, at least one connecting arm 12, and a plurality of driving members 13. The following will be described by taking the mechanical arm 50 provided with only one connecting arm 12 as an example to illustrate the structural design of the mechanical arm 50.

[0080] As shown in Figure 17 and Figure 18 The head end section arm 513 is provided with a first section arm support shell 5131, a head end main support 5132, and a head end auxiliary support 5133.

[0081] As shown in Figure 18 The head end main support 5132 is provided with a first fork-shaped portion and a first curved portion, the first curved portion is shaped in a half track type, and the two ends of the half track type of the first curved portion have two connection positions with the first fork-shaped portion, and the connection line direction of the two connection positions is perpendicular to the connection line direction of the two fork arms of the first fork-shaped portion. The first section arm support shell 5131 and the two fork arms of the first fork-shaped portion are fixedly connected and located between the two fork arms of the first fork-shaped portion. The position of the first curved portion opposite to the first section arm support shell 5131 is provided with a first fixed through hole 5134, and the inner wall of the elbow position of the first curved portion is smoothly arranged.

[0082] As shown in Figure 18As shown, the head end sub-support 5133 is provided with a second forked portion and a second curved portion, the second curved portion is shaped as a half track type, and the two ends of the half track type of the second curved portion have two connection positions with the second forked portion, the connecting line direction of the two connection positions is perpendicular to the connecting line direction of the two prongs of the second forked portion. The two prongs of the second forked portion are rotationally installed on the first section arm support shell 5131, and the first section arm support shell 5131 is located between the two prongs of the second forked portion. The position opposite to the first section arm support shell 5131 of the second curved portion is provided with a second fixed through hole 5135, and the outer wall of the curved position of the second curved portion is smoothly arranged. The outer wall corresponding to the second fixed through hole 5135 of the second curved portion is provided with a head end recess groove 5136, and the extension direction of the head end recess groove 5136 is consistent with the extension direction of the track type of the second curved portion.

[0083] That is, the first forked portion and the second forked portion jointly constitute a first end portion of the U-shaped structure of the head end section arm 513, and the first curved portion and the second curved portion jointly constitute a second end portion which is curvedly shaped, and the first end portion and the second end portion are orthogonally arranged. In the specific application of the head end section arm 513, the output end shell of a driving member 13 is fixedly installed on the first end portion of the head end section arm 513 (i.e. the output end shell of the driving member 13 is fixedly installed on the first section arm support shell 5131 which is fixedly connected with the two prongs of the first forked portion), and the shell of another driving member 13 is fixedly installed on the second end portion of the head end section arm 513.

[0084] As Figure 18As shown, the first arm support shell 5131 includes a head end shell 51311 and a head end rotating end cap 51312. The two fork arms of the first fork-shaped portion and the two fork arms of the second fork-shaped portion are connected to the outer walls of both sides of the head end shell 51311. The head end rotating end cap 51312 is rotatably mounted on the head end shell 51311. Specifically, the head end shell 51311 has a head end placement space 51313. The inner wall of the head end placement space 51313 has a plurality of circumferentially spaced head end cantilever arms 51314, preferably two centrally symmetrical head end cantilever arms 51314. Furthermore, the inner wall of the head end placement space 51313 has a head end stepped surface 51315 corresponding to the head end cantilever arm 51314, and a head end assembly opening 51316 is formed between the free end of the head end cantilever arm 51314 and the head end stepped surface 51315. The inner wall of the rotating end cap 51312 is provided with a plurality of radially extending end catches 51317, preferably two oppositely arranged end catches 51317. When the rotating end cap 51312 is installed onto the end housing 51311, the two end catches 51317 are respectively aligned with the two end mounting openings 51316, allowing the end mounting openings 51316 to open slightly, thereby allowing the end catches 51317 to enter between the end cantilever 51314 and the end stepped surface 51315. Under normal circumstances, when the end mounting opening 51316 is not expanded, the end catches 51317 are difficult to disengage from between the end cantilever 51314 and the end stepped surface 51315, thus confining the rotating end cap 51312 to the end housing 51311. Furthermore, the head end latch 51317 can rotate and slide between the head end cantilever 51314 and the head end stepped surface 51315, and the head end latch 51317 and the head end cantilever 51314 are spaced apart.

[0085] like Figure 16 As shown, when installing a drive unit 13 onto the first arm support housing 5131, specifically, the output end housing 133 of the drive unit 13 is installed onto the first arm support housing 5131. The output end housing 133 of the drive unit 13 is inserted into the head end placement space 51313, aligning the insertion port 1331 and the corresponding head end catch 51317 until the head end catch 51317 enters the insertion port 1331. Then, the head end rotating end cap 51312 is rotated, causing the head end catch 51317 to slide into the catch groove 1332. In this way, one side wall of the catch groove 1332 is blocked by the cooperation of the head end catch 51317 and the head end cantilever 51314, thus abutting the head end cantilever 51314. This completes the installation of the drive unit 13 and the first arm support housing 5131.

[0086] Then, the other driving member 13 is installed to the second end of the head link arm 513, specifically, the first housing 131 of the driving member 13 is installed between the first bending part and the second bending part. As shown in Figure 16 the second bending part is first rotated out so that the second fixed through hole 5135 is no longer opposite to the first fixed through hole 5134, then the first housing 131 of the driving member 13 is put into the half track-shaped space of the first bending part, and one mounting lug 1311 of the first housing 131 of the driving member 13 is inserted into the first fixed through hole 5134. Then, the second bending part is rotated back into the head main support 5132, and the other mounting lug 1311 of the first housing 131 of the driving member 13 is correspondingly inserted into the head recessed groove 5136 and slides along the head recessed groove 5136 until the mounting lug 1311 is inserted into the second fixed through hole 5135. During the sliding of the mounting lug 1311 along the head recessed groove 5136, the second bending part is slightly elastically deformed by the extrusion of the mounting lug 1311, so that the mounting lug 1311 can slide along the head recessed groove 5136 and be inserted into the second fixed through hole 5135. In this way, the two mounting lugs 1311 are respectively inserted into the first fixed through hole 5134 and the second fixed through hole 5135, so that the first housing 131 is limited and cannot be separated from the second end, and the two mounting lugs 1311 respectively abut against the inner wall of the first bending part and the outer wall of the second bending part, so that the first housing 131 is clamped between the head main support 5132 and the head auxiliary support 5133 and cannot be loosened.

[0087] Then, the output end housing 133 of the driving member 13 installed to the second end of the head link arm 513 is installed to the first end of the connecting arm 12. Then, the third driving member 13 of the mechanical arm 50 is installed to the second end of the connecting arm 12.

[0088] Finally, the end link arm 514 and the output end housing 133 of the third driving member 13 are installed, and the mechanical arm 50 provided with only one connecting arm 12 is assembled. As shown in Figure 19 and Figure 20As shown, the end link arm 514 comprises a tail rotating end cover 5140, a tail sleeve 5141 and a tail operating part 5142, and the tail operating part 5142 is fixedly connected to the outer wall of the tail sleeve 5141. The tail operating part 5142 can be a humanoid palm, a suction cup assembly, a fork or a mechanical clamp device. The tail operating part 5142 of the embodiment is preferably a mechanical clamp device, which is widely used in the prior art and will not be described here. Specifically, the tail sleeve 5141 is provided with a tail placing space 5143, and the inner wall of the tail placing space 5143 is provided with a plurality of tail cantilever arms 5144 arranged in a circumferential direction, preferably two tail cantilever arms 5144 arranged in a central symmetry. Moreover, the inner wall of the tail placing space 5143 is provided with a tail stepped surface 5145 corresponding to the tail cantilever arm 5144, and a tail assembly opening 5146 is formed between the free end of the tail cantilever arm 5144 and the tail stepped surface 5145. The inner side wall of the tail rotating end cover 5140 is provided with a plurality of tail lugs 5147 extending in a radial direction, preferably two tail lugs 5147 arranged oppositely. When the tail rotating end cover 5140 is installed to the tail sleeve 5141, the two tail lugs 5147 are respectively corresponding to the two tail assembly openings 5146, so that the tail assembly openings 5146 are slightly opened, so that the tail lugs 5147 enter between the tail cantilever arms 5144 and the tail stepped surface 5145. Under normal circumstances, when the tail assembly openings 5146 are not expanded, the tail lugs 5147 are difficult to separate from between the tail cantilever arms 5144 and the tail stepped surface 5145, thereby limiting the tail rotating end cover 5140 on the tail sleeve 5141. Moreover, the tail lugs 5147 can rotate and slide between the tail cantilever arms 5144 and the tail stepped surface 5145. The output end shell 133 of the third driving member 13 is inserted into the tail placing space 5143, so that the insertion port 1331 and the corresponding tail lug 5147 are aligned with each other, until the tail lug 5147 enters the insertion port 1331. Then, the tail rotating end cover 5140 is rotated, so that the tail lug 5147 slides into the slot 1332 along the slot 1332. In this way, one side of the slot 1332 is stopped by the tail lug 5147 and the tail cantilever arm 5144, and at this time, one side of the slot 1332 abuts against the tail cantilever arm 5144.

[0089] When it is necessary to expand the extension length of the mechanical arm 50, the number of the connecting arms 12 and the number of the driving members 13 required to be added can be selected according to the actual extension length required to be expanded by the mechanical arm 50, and all the connecting arms 12 and the driving members 13 are sequentially connected to form an expansion module of the mechanical arm 50. Then, the expansion module connected in series is connected in series with the head end link arm 513 and the tail end link arm 514 to complete the expansion of the mechanical arm 50.

[0090] As shown in Figure 15 and Figure 16 illustrated, the driving member 13 and the adapter 51 of the mechanical arm 50 mounted to the first arm support shell 5131 are connected and fixed. Specifically, the adapter 51 includes an adapter plate frame 5101, a first adapter seat shell 5102 and a second adapter seat shell 5103.

[0091] As shown in Figure 15 and Figure 16 illustrated, along the length direction of the educational robot, the left and right side edges of the adapter plate frame 5101 are each protrudingly provided with a plurality of clamping blocks 511, preferably, the left and right side edges are each protrudingly provided with two clamping blocks 511.

[0092] As shown in Figure 16 illustrated, the first adapter seat shell 5102 can be a separate component relative to the adapter plate frame 5101, at this time the first adapter seat shell 5102 is fixedly installed on the adapter plate frame 5101 by a plurality of screws; the first adapter seat shell 5102 can also be an integral part of the structure formed with the adapter plate frame 5101. As shown in Figure 16 illustrated, the first adapter seat shell 5102 includes a bottom shell 51021, a first side wall 51022 and a second side wall 51023. In this embodiment, the bottom shell 51021 is preferably fixedly installed on the adapter plate frame 5101 by a plurality of screws. The first side wall 51022 and the second side wall 51023 are connected to the bottom shell 51021 in opposition, so that two opposite limiting notches 51024 are formed between the first side wall 51022 and the second side wall 51023. And, the end outer wall of the first side wall 51022 and the second side wall 51023 away from the bottom shell 51021 is provided with a first buckling 51025.

[0093] As shown in Figure 16 illustrated, the second adapter seat shell 5103 is provided with a through channel 51031, the inner wall of the through channel 51031 is provided with two opposite avoiding grooves 51032 and two second buckles 51033, the connecting line between the two avoiding grooves 51032 and the connecting line between the two second buckles 51033 are perpendicular to each other. The second buckles 51033 and the first buckles 51025 cooperate with each other to limit the second adapter seat shell 5103 on the first adapter seat shell 5102, specifically, the bottom shell 51021, the first side wall 51022 and the second side wall 51023 of the first adapter seat shell 5102 pass through the through channel 51031, and then the bottom shell 51021 is fixedly installed on the adapter plate frame 5101 by a plurality of screws, at this time, the first buckles 51025 block the second buckles 51033, so that the second adapter seat shell 5103 cannot be separated from the first adapter seat shell 5102.

[0094] As shown in Figure 16As shown, when the driving member 13 and the adapter 51 of the mechanical arm 50 mounted to the first arm support shell 5131 are assembled, two avoiding grooves 51032 of the second adapter shell 5103 are aligned with two limiting notches 51024 of the first adapter shell 5102, then two mounting lugs 1311 of the driving member 13 enter into the two limiting notches 51024 through the two avoiding grooves 51032, and the mounting lugs 1311 abut to the bottom of the limiting notches 51024. At this time, the outer wall surface of the mounting lugs 1311 away from the bottom of the limiting notches 51024 is basically flat with the wall surface of the second buckling convex 51033 towards the first adapter shell 5102, then the second adapter shell 5103 is rotated, so that the mounting lugs 1311 are clamped between the second buckling convex 51033 and the bottom of the limiting notches 51024, at this time, two ends of each first buckling convex 51025 are buckled on the side surface of the two second buckling convexes 51033 towards the driving member 13 respectively. And the end surface openings of the two mounting lugs 1311 are exposed between the first adapter shell 5102 and the second adapter shell 5103, thereby facilitating the installation of the plug-in terminals.

[0095] The above only represents the preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A connecting arm, characterized in that The connecting arm comprises: a first connecting part comprising a first sleeve and a first side wall connected with the first sleeve; a second connecting part comprising a sleeve cover and a second side wall connected with the sleeve cover, the sleeve cover covering the first sleeve, the first sleeve and the sleeve cover cooperating to fix a first driving member, the second side wall and the first side wall oppositely connected; a rotating inner support rotatably clamped between the first sleeve and the sleeve cover, the rotating inner support and the first side wall cooperating to fix a second driving member; by rotating the rotating inner support to fix the two driving members, the output end shell of the first driving member is fixedly clamped in the first sleeve, and meanwhile, the opposite two mounting lugs on the shell of the second driving member are clamped between the rotating inner support and the first side wall, one of the first driving member and the second driving member being used to connect to a body of an educational robot, and the other of the first driving member and the second driving member being used to connect to a wheel.

2. The connecting arm according to claim 1, wherein the second side wall and the first side wall are connected to form opposite first and second avoiding openings, the first side wall is provided with a first mounting through hole at a position opposite to the first sleeve, the rotating inner support comprises a second sleeve and a curved frame, both ends of the curved frame are connected to the second sleeve, the second sleeve is rotatably clamped between the first sleeve and the sleeve cover, the curved frame can rotate through the first avoiding opening or the second avoiding opening, the curved frame is provided with a second mounting through hole at a position opposite to the second sleeve, and the first mounting through hole and the second mounting through hole are used to mount and fix the two mounting lugs of the second driving member.

3. The connecting arm according to claim 2, wherein the curved frame is shaped as a racetrack profile, and the curved frame is smoothly transitioned towards the outer side wall of the first mounting through hole.

4. The connecting arm according to claim 3, wherein the curved frame is provided with a recessed groove towards the outer side wall of the first mounting through hole, and the extension direction of the recessed groove is consistent with the extension direction of the curved frame.

5. The connecting arm according to claim 2, wherein a plurality of notches are provided on the end of the first sleeve towards the sleeve cover, the sleeve cover covers the notches to form a sliding guide groove, the inner wall of the second sleeve is provided with a plurality of clamping protrusions, each of the clamping protrusions is located in the notch one by one, and the clamping protrusions slide in the sliding guide groove, the peripheral edge of the sleeve cover is provided with a stop protrusion, the clamping protrusions and the stop protrusion are arranged in intervals, and the clamping protrusions and the stop protrusion cooperate to clamp and fix one side groove wall of the clamping groove of the output end shell of the first driving member.

6. The connecting arm according to claim 5, wherein The number of the gaps is two, the two gaps are symmetrically arranged relative to the central axis of the first sleeve, and the number of the locking protrusions is two, the two locking protrusions are symmetrically arranged relative to the central axis of the second sleeve.

7. The connecting arm according to claim 5, wherein, The side of each locking protrusion facing the stop protruding edge is arranged as a curved surface protruding towards the stop protruding edge.

8. The connecting arm according to any one of claims 2-7, wherein, The curved frame is bent into a track-type profile, and the curved frame is smoothly arranged towards the outer side wall of the first mounting through hole.

9. The connecting arm according to claim 8, wherein, The curved frame is provided with a recessed groove towards the outer side wall of the first mounting through hole, and the extension direction of the recessed groove is consistent with the extension direction of the curved frame.

10. An educational robot, characterized by The connecting arm according to any one of claims 1-9.

Images