Table Tennis is a sport that everyone likes. But In today's treat time as gold, it is not easy to want to find a time to accompany a beginner; secondly, more and more the people want their table tennis technology higher, but they have no rivals. On this basis, in order to really make the table tennis training completely out of accompanying training, in this paper, the training machine and training system of table tennis have been studied.

The Multi-functional medical bed has been designed to the patient whose life cant been provided for oneself, critically ill patients, and the special needs of paralyzed patients. In the paper, through market research and according to the structure of existing medical bed, a manual medical bed has been designed; And the bed board, lift back and leg mechanism, defecation device and eat device of the medical bed have been discussed; the feasibility analysis of the motion mechanism has been carried and the basic design parameters of the product have been determined; on the basis, the main structure for medical bed has been carried on the design and calculation. The results showed that function of the medical bed is reliable, the structure is reasonable, and it is in line with the requirements of ergonomics. Especially, some of these institutions have been optimized and replace to use more convenient and quickly.

Based on the survey of existing brush cutter and the analysis of the known conditions, this paper mainly studied design mechanism and principle of brush cutter, and carried on calculation and calibration of spiral bevel gear cutting machine parts, so as to ensure that the design of brush cutter is safe, efficient, simple, comfortable and environmentally friendly. Product after research is of reliable performance, convenient operation, low noise and zero smoke and higher safety factor, making it get more extensive application in the industry.

In order to improve the sealing quality and reduce the labor intensity of people, the stepping motors have been adopted in the salver mechanical transmission part and sealing part of the original sealing machine. In the paper, salver feeding and control system of sealing machine have been designed. The results have been obtained such as control principle diagram of the control system, equivalent circuit diagram and outer wiring diagram of PLC and PLC control program. It can realize the automatic control of the sealing machine. Improved sealing machine has the characteristic of simple mechanical transmission parts, advanced control system, small human error, low fault rate and easy operation.

With technology changing rapidly, design of sealing machine for bagged food is also already at the leading edge of the times. This single-layer film and sealing a variety of composite membrane is widely used in food, pharmaceutical, seed, chemical, light industry and other departments. In modern life, it can say that we have all the time with the "seal" has a direct or indirect contact. Therefore, the design of a simple food vacuum bag-sealing machine, it went into the family, Is the common expectations of consumers.In paper, principle of sealing machine for bagged food has been discussed and the vacuum sealing machine including use function and art function has been designed. The sealing machine is fit for home and can prevent food in refrigerator dehydrating, mixing smell, deteriorating etc.