5 results about "Tooth abrasion" patented technology

The invention discloses a production method and application of toothpaste-grade calcium pyrophosphate, the production method comprises the following steps: mixing calcium hydrophosphate with a magnesium source, heating to 750-830 DEG C at a rate of 4-6 DEG C / min, calcining for 2-4 hours, then carrying out three-gradient cooling on the calcined product, and finally crushing to obtain the toothpaste-grade calcium pyrophosphate, wherein the three-gradient cooling comprises the steps of heating and slowly cooling to 500 DEG C at the speed of 10-15 DEG C / min, then naturally cooling to 100-150 DEG C, and finally cooling to below 50 DEG C at the speed of 3-5 DEG C / min. The prepared toothpaste-grade calcium pyrophosphate is high in beta-phase conversion rate, small in tooth abrasion value, uniform in particle size distribution, excellent in performance when applied to toothpaste grinding materials and wide in application prospect.

The utility model belongs to the technical field of transmission shafts, and particularly relates to a non-welding spherical tooth transmission shaft which comprises an inter-shaft connecting pipe, a first spherical tooth coupler and a second spherical tooth coupler are symmetrically connected to the two ends of the inter-shaft connecting pipe, each of the first spherical tooth coupler and the second spherical tooth coupler comprises a spherical tooth seat, and spherical tooth shafts are connected to the spherical tooth seats in a meshed mode. The self-aligning ball gear is characterized in that one end, close to the ball gear seat, of the ball gear shaft is fixedly connected with a self-aligning assembly, and an arc-shaped surface is arranged at the position, corresponding to the self-aligning assembly, of the ball gear seat. The faults of transmission efficiency reduction, abnormal sound and the like caused by center offset of the outer spherical tooth part after the inner and outer spherical teeth are worn are avoided, the service life of the product is prolonged, and the use effect is improved.

The utility model discloses a buckle connecting device based on bracketless invisible corrector. The device includes bracketless invisible corrector, connecting groove body and connecting head, and the front part of bracketless invisible corrector is provided with connecting groove body, and bracketless invisible corrector and connecting groove body are integrally made, and connecting head is connected with bracketless invisible corrector by cooperation with connecting groove body, and connecting groove body and connecting head are all provided with arc part that is in accord with the front side of bracketless invisible corrector, and the arc part between connecting groove body and connecting head is connected through ball head structure. The device can conveniently and stably install components to upper dentition or lower dentition, and can extend to outside of oral cavity through connecting head, and does not need glue and tooth abrasion, and is a non-invasive, convenient and painless connecting device.

The invention belongs to the technical field of bucket tooth abrasion testing, and particularly relates to an excavator bucket tooth abrasion testing device and method. Comprising a bucket; a U-shaped handrail; the bucket is connected with a plurality of bucket teeth; the U-shaped holding rod is arranged at the top of the excavator bucket, and the excavator bucket is located in the opening range of the U-shaped holding rod; a retention self-clamping unit is arranged on the U-shaped handrail; the retention self-clamping unit comprises a retention T plate; the two retention T plates are mounted at the two ends of the U-shaped handrail respectively; two first bases are connected to the side face of the U-shaped handrail. The opposite faces of the two first bases are jointly connected with a main sliding rail. The main slide rail is provided with a decontamination and loss measurement device; by means of the technical scheme, attachments such as soil blocks attached to the bucket teeth can be actively and synchronously cleaned during testing, the influence on the testing result of the bucket teeth is avoided, the testing precision is improved, the labor intensity of workers is reduced, the attachments do not need to be manually cleaned, the using effect of the device is improved, and therefore the overall testing efficiency is improved.

The invention discloses a reliability analysis method for an intelligent harmonic reducer of a robot body, and aims to solve the problems that the reliability analysis of an existing harmonic reducer neglects the load uncertainty, does not consider the influence of intelligent sensor installation and is low in model and actual fitting degree. The method comprises the following steps: establishing component models of a flexible gear, a rigid gear, a wave generator and an intelligent film sensor; model simplification is carried out on tooth meshing of the flexible gear and the rigid gear, cementing of the flexible gear and the sensor and contact of the flexible gear and the wave generator. Sampling in a range of [0, 30] N / m by adopting DOE optimal Latin hypercube design to obtain a variable load sample; inputting the variable load to the dynamic model for simulation; and evaluating the reliability based on transmission precision, tooth abrasion loss, strain and back clearance indexes. According to the method, the accuracy and practicability of reliability analysis of the intelligent harmonic reducer are improved, and the method is suitable for full-life-cycle state sensing requirements of a robot in an intelligent scene.