The invention provides a portable gear hobbing machine for teaching demonstration. The portable gear hobbing machine comprises a box body machine frame, a position-changing mechanism, a driving mechanism, a roll-cutting mechanism, a worm and gear transmission mechanism, a bevel gear transmission mechanism and a synchronous pulley transmission mechanism. The driving mechanism is connected with the position-changing mechanism through the worm and gear transmission mechanism. Transmission is achieved between the driving mechanism and the roll-cutting mechanism through the bevel gear transmission mechanism and the synchronous pulley transmission mechanism. A workpiece clamping device is vertically arranged on the position-changing mechanism. The portable gear hobbing machine is particularly suitable for visually demonstrating the generating method gear machining principle in classroom teaching, and has the advantages of being small and exquisite in size, compact in structure, low in manufacturing cost, convenient to carry, easy to operate, high in safety, ideal in teaching demonstration effect and the like.

Portable gear hobbing machine for teaching demonstration

The invention discloses a gear train teaching aid. A gear train teaching aid high in integration level is not available in the prior art. The gear train teaching aid comprises an outer rack, an inner rack, a power input component, an inner rack driving component and a planetary gear train. The planetary gear train comprises a planetary carrier, a planetary carrier shaft, a sun gear, a transmission shaft component and an output shaft component. The sun gear is fixedly connected with the inner rack, the planetary carrier is fixed to the planetary carrier shaft, the power input component drives the planetary carrier shaft, a transmission shaft input gear of the transmission shaft component is meshed with the sun gear, a first output shaft gear, a second output shaft gear and an elliptical gear are all fixed to an output shaft, transmission shaft output gears in three types are meshed with the first output shaft gear, the second output shaft gear and the elliptical gear respectively, one end of a connecting head is connected with the planetary carrier shaft through a bearing, the other end of the connecting head is fixed to one end of the output shaft, and the inner rack driving component drives an inner rack. The gear train teaching aid meets the needs for aided teaching of gear grain classification, planetary gear trains, elliptical gear transmission characteristics and conversion gear trains.

Gear train teaching aid

The invention discloses an electromechanical integrated universal teaching platform comprising a rack, a control system and a human-machine interface operating system, and further comprising an independent freely detachable and assembled three-phase asynchronous variable-frequency drive module, a direct current speed-regulation drive module, a stepping motor drive module and/or a servo motor drive module. A standard electromechanical integrated universal teaching device provided by the invention meets most of teaching program requirements of electromechanical integrated teaching materials, and has the characteristics of openness, innovativeness and property of participation; and therefore, a trainee can easily comprehensively handle the application development and integration of an electromechanical integration technology, the education on the aspects, such as machine design, electric automatization, automatic control, machine assembly, sensor technology and pneumatic technology, can be facilitated, the practical training of skills, such as motor drive and control technology, design and application of a PLC (programmable logic controller) control system, network communication technology and high-level language programming, is obtained, and the abilities of design, assembly, debugging and the like all can be comprehensively improved.

Electromechanical integrated universal teaching platform

The invention discloses a verification instrument for gear center distance severability, and belongs to the field of demonstration teaching tools A driving gear rotation device drives a driving gear to rotate, and the driving gear transmits torque to a driven gear through tooth profile meshing; the change of angular displacement between the driving gear and the driven gear is detected through a detection unit in real time and is displayed through a digital display device; the consistency of the instantaneous transmission ratio of gear transmission is determined by observing the synchronization of the change of the rotating angle between the driving gear and the driven gear; the center distance between the driving gear and the driven gear is changed through a center distance adjusting device; under different center distance conditions, experiments are performed many times so that the gear center distance severability can be verified The novel demonstration teaching tool is provided for classroom teaching of the gear center distance severability content of an involute profile; besides, as the verification instrument is organically combined with the theoretical teaching modes of text representation and formula derivation, boring knowledge points can be displayed vividly, and the effect of classroom teaching is effectively improved

Verification instrument for gear center distance severability

The invention relates to a numerically-controlled gear shaper comprising a shaper body, a workbench, a post and a transmission box. The workbench and the transmission box are arranged on the shaper body, the post is arranged at the upper end of the transmission box and is provided with an electric box and an operating panel, and the operating panel corresponds to a cutter holder on the side of the post. The numerically-controlled gear shaper further comprises a main moving system, a cutter relieving moving system, a radial feeding moving system, a spindle rotating moving system, a workbench rotating moving system and a spindle stopping moving system. The numerically-controlled gear shaper is simple in structure and reasonable in design; the upper and lower travelling distances are long and adjustable in return of a cutter shaft, the cutting force is sufficient, the cutter shaft has high rotating accuracy, and shutdown inertance is small.

Numerically-controlled gear shaper

The utility model relates to a gear shaping machine tool for teaching, which is used for demonstrating the process of machining a gear in teaching by a generation method. A mechanical transmission system of a gear shaping machine is driven by a motor connecting belt or outputs power manually; a main shaft is driven to rotate, move up and down and do cutter relieving motion by the mechanical transmission system; and meanwhile, a workpiece rotary table is driven to rotate and do feed motion. The gear shaping machine tool has a simple and intuitive structure and an appropriate size, is convenient to operate, and can be used for deepening the understanding of a student on the working principle of making an involute-cylindrical gear by the generation method through a gear shaping experiment during teaching. Moreover, the student can also intuitively study various mechanical transmission devices.

Lihong Mao

Papers

Gear shaping machine tool for teaching